TV purchase these your attention yet

LED is better than LCD picture quality

This rumor logic is clear: Since the LED TV is the latest out, then the quality is certainly better than in the past with CCFL backlight ( commonly known as LCD) LCD TV is good. What this really true ?
As mentioned earlier , LED TV's biggest advantage is long life , high brightness, low power consumption, small size. As to the quality better than that of LCD, but also depends on the spectral characteristics of the LED , high- performance focusing on only those LED TVs , by using particles of a high-performance LED , combined panel and picture quality processing techniques to achieve high quality. In addition , in the past , when the LED TV does not appear , there are many high-end LCD TV by using a high performance CCFL backlight and panel to achieve a high quality , which is the same reason.

5 = buy buy LCD TV panels


LCD panel LCD TV sets accounted for more than 70 % of the cost , this is not to deny the fact . But does that mean that buying a TV panel is to buy it ? The answer is of course no.
The following reasons:

1 , the LCD panel only occupy a larger share of the costs of the machine . For "good" TV and " bad" TV is the same.

2 , bucket theory tells us that the key factor in determining good or bad thing is how short the shortest piece of board , rather than how long the longest piece of board . So if only the LCD panel is good,20x4 lcd display the other bad parts , but also can not make a good TV.

3 , even the best LCD panel plant , out of the products have quality differences. Can not say that so and so long as it is produced in a liquid crystal panel is good, so and so is the production of LCD panels bad .

6 , hard screen than the soft screen strong , impact

This statement is more popular in the last year , many consumers once considered hard-screen LCD TV in front of the screen adds an extra layer of protection , so the more solid , impact resistance. At that time a lot of sales in stores selling television sets in order to prove himself with a "hard screen" , will hand to knock , push the TV screen , in order to prove their strong sales of the TV screen , and durable.
In fact, the difference between hard and soft-screen in the direction of the liquid crystal molecules are arranged just different decision . Hard screen and no additional protective layer on the surface, so it does not seem to be more solid than the soft screen , impact resistance.

In fact , the biggest difference between hard and soft-screen or display different characteristics , focusing on hard screen color reproduction of authenticity , but generally not as soft contrast screen ; soft screen contrast generally good , but the color is more obvious tendency . In fact, this is the difference in style ,Character LCD Modules and physical structure , is strong, durable , and no significant relationship .

3D movies really hurt the eyes do

3D TV is a recently popular new things . But now there are a lot of people say that 3D movies hurt the eyes ,character oled then it really true ?
3D content itself is actually no damage to the eyes . Because we humans are in fact seen every day 3D stereoscopic images . There are still a number of medical institutions in the use of 3D content for young people to correct myopia and treatment , we can see , 3D does not contradict itself and the vision health .

As some people get dizzy watching 3D , uncomfortable , this is actually about and display device itself . For example, some 3D TV in 3D mode due to the lower refresh rate, flicker strong sense , it is easy to arouse the viewer's visual fatigue ; also some 3D sources when shooting because there is no good debugging equipment, resulting depth of field problems, this picture also being looked likely to cause visual fatigue and even nausea , TFT LCD Display uncomfortable. All these questions can not blame onto 3D concept.

LCD screen, PDP screen, DLP big-screen TV wall

In the growing field of surveillance technology, high-definition monitor will also be a shining star, re-examine it in the light of the world around us. With the increasing development of monitoring technology, high-definition surveillance technology as one of the main directions of development, combined with network technology brings new changes, competition in the market continue to meet demand, tend to think about a rational, high-definition monitors are is a high-profile, high demand into our world.

LCD LCD TV wall mosaic

LCD LCD splicing DID Korea currently represented on the display market although there SHARP, LG, NEC and other brands, but DID outshine its excellent value for money in the LCD panel stitching techniques. The so-called large-screen LCD LCD, LCD display unit is the use of mosaic way through splicing control software system to implement a large-screen display screen body mosaic effect.

As a TV wall mosaic display terminals, OLED Display Despite these advantages, but as a mosaic TV wall display unit, its shortcomings are fatal: it is the current patchwork teach their large, and the display unit in the three largest TV wall mosaic, so many Users had to reluctantly give up. LCD TV wall mosaic with a thin, light weight, low power consumption, long life, no radiation, etc., and its delicate screen, high resolution, excellent performance on key performance indicators, has made it become the mainstream of development prospects.

Large plasma-screen TV wall system

Plasma display panels (PDP) is a use of gas discharge display technology, which works with the lamp is very similar. It uses a light emitting element such as a plasma tube, each plasma tube corresponds to a pixel on the screen, the screen as a glass substrate, spaced from the substrate, forming a discharge space. Filled into the discharge space neon, xenon, an inert gas mixture as a working medium, the inner surface of two glass substrates coated with a metal oxide conductive film as the excitation electrode. The plasma discharge generates ultraviolet rays, ultraviolet rays excite phosphor coated with red, green and blue phosphor screen, visible light emitting phosphor screen, the image appears. When added to the voltage on the electrodes, the discharge space of the mixed gas plasma discharge phenomenon will occur, also known as plasma effects.

DLP TV wall system

DLP. This technique is to first go through a digital video signal processing, and then the light is projected. Specifically, DLP projection technology is the application of a digital micromirror chip (DMD) to do the key elements to achieve digital optical processing. The principle is that a light source by an integrator (Integrator), homogenizing the light, the three primary colors through a color wheel (ColorWheel), separating the light into R, G, B three colors, and then imaged by the lens color DMD on.

Currently, more common large-screen TV wall system, according to work is usually divided into three main types of display units: low temperature 160x160 lcd TV wall mosaic display unit, PDP display unit and DLP rear projection TV wall mosaic mosaic display unit. The former two of which belong to the flat panel display unit splicing system, which belongs to the projection unit splicing system.

Some advantages of commercial LCD display

There are a lot of users do not understand, commercial and civilian display screen exactly what is the difference? Today, the difference between a simple presentation on screen between commercial and residential, hoping to help netizens.

1, clarity

Common display devices support only a few TV common resolution specified in the instructions. Because the resolution is only a few civilian television signals, television LCD screen resolution as long as several civilian users based on common use was more effective treatment, a special resolution will result in the video. Commercial display with intuitive features to reflect the image quality, combined with full 1920 x 1080 resolution display for the field of radio and television equipment selection, the LCD screen is the preferred choice of professional display resolution is automatically adjusted according to the display resolution output rate (regardless if they had to support); its high reliability and high-definition display capabilities will ensure that you can record high-definition video edited, the video signal is displayed in the viewer a complete front.

2, stability

Commercial display products usually require 24 hours non-stop operation to meet the needs of a variety of information display, and a display device using the environment than the civilian environment is much worse, the performance of the product which made a higher demand.

And compared to the ordinary display devices, the design, the current commercial display, power, temperature and resistance to electrical interference, capacity and electric shocks margin and the average time between failures are much larger than the former. In the selection of components, various components of the voltage characteristics, current, temperature, humidity and other providers must use significantly higher than TV components; commercial display must also use fully shielded metal case ensure electromagnetic compatibility and interference.

Normal aging display device manufacturing machine in the pipeline is usually energized about 8 hours at room temperature, and the aging machine supplier obvious need in the high temperature and humidity in a closed environment of aging pipeline aging electricity for more than 24 hours to ensure the machine stability. On installation, commissioning, especially components and the aging process requirements, business requirements are significantly higher.

3, Panel

Although commercial and civilian display TFT LCD panels are used, but there is a big difference between them. The biggest difference between them mainly in the size of the liquid crystal molecules, image processing and color, brightness and contrast, viewing angle and so on.

Ordinary LCD display is more important to performance of the entire screen, a small part of the request is not very demanding, more important is the use of a liquid crystal can reduce the cost of macromolecules. Liquid crystal molecules than ordinary LCD panel 256x64 oled display screen to big business, because commercial display when viewing distance is generally not more than one meter, the most important thing is to show the details of the liquid crystal molecules are smaller, Of course, this panel cost is more expensive.

4, the interface

Of course, there are many common display devices also have a RS-232 control port, but its use is basically just used to control lighting, etc., and can not be achieved in industrial control. Because the feeder demand, commercial displays general use industrial port, such as the color RGBBNC with interface and professional video interface DVI-D self-locking mechanism and so on. In addition, suppliers can be significant S232 serial control, password control and open up to more than 200, to adapt to a variety of industrial environments. Easy to use multi-display, not by remote control can control all display devices, and be able to assist, boot time, delay boot, self-test machines and other industrial requirements.

With the continuous development of display technology, in addition to civil, many display manufacturers have launched a commercial display products, these products are mainly used in many public display areas like subways, airports, shopping malls, etc., used to display a variety of real-time Information for people's daily life provides a great convenience. TFT LCD Displays has become a modern society, people work and live essential equipment.

LCD panel can show the number of colors

In the purchase of Graphic LCD Display TV, in addition to often see the screen size, resolution, brightness, contrast, response time specification parameters, often we will find that there is a word called "Colors." Different brands and models of LCD TVs for the description of the number of different colors, the corresponding figure is night and day to another, some marked only 16.7 million, some labeled as 1 billion, as well as a more exaggerated marked as 28.9 billion. So, what these numbers represent what the meaning behind its products can reflect much difference between it?
 
LCD TV can show a number of colors by what factors determine it?

First, we have to be cognizant of two completely different concepts, one is the LCD panel can show the number of colors, an internal circuit is capable of handling the number of colors, both of which are related to the lcd modules TV can be displayed delicate color gradation extent.

LCD panel can show the number of colors

LCD panel can be expressed by the number of colors inherent physical characteristics of the panel decision. According to the basic principle of the liquid crystal display image, the liquid crystal molecules by two glass substrates attached to the upper and lower driving voltage between the occurrence of the corresponding deflection angle, the light through the liquid crystal layer when the angular deflection according to the size of the liquid crystal to obtain different levels of transmission, the This is reflected in the panel have different levels of gray scale contrast. When light passes through the liquid crystal layer needs through the filter, the filter corresponding to each pixel is divided into red, green, and blue small squares, the original white light from these small squares separated out after filtration , the entire panel can present a variety of colors, which is colorful screen display panel simple principle.

LCD driving principle


The liquid crystal panel of the full color image forming process
From the above description it can be seen, the panel can be expressed by the number of colors of the liquid crystal drive deflection angle of the degree of sensitivity. Assuming deflection voltage variation and LCD is divided into 256 steps, then when the voltage generating a step change in the liquid crystal along the angle of deflection of an order, so the panel can show a color change of order; However, if the voltage to produce a step change When the liquid crystal molecules did not produce a corresponding first-order angular deflection, then no one step on the performance of the panel color changes.

Therefore,OLED Module  there is a liquid crystal panel, the number of colors can be expressed concept, which is determined by the panel of the innate physical properties. As in the display people tend to care about what is TN panel or a VA panel, largely because TN panels can be demonstrated by the number of colors as rich VA panel, showing a level of less than VA panel screen delicate vivid. Of course, the above description is idealized assumption, I just hope that this can be expressed in a more intuitive and easier to describe the problem.

Plasma maintenance Cheats

With the current plasma TV technology updates, and more friends to buy a plasma TV, especially like to see blockbusters and friends to play the game even more keen on plasma TVs, lcd module plasma TVs this is because the technical advantage. Here I explore with you when maintenance Plasma TV will pay attention to.
1 Remember to avoid the heat, tide, dust

High-power plasma TV is well known, so we must ensure that its cooling effect, or if improper cooling on plasma screens will cause fatal injuries, and even burned. When the TV is turned on items not covered in the machine, and pay attention to ventilation. Resting period of time to pay attention to every clean dirt, dust and static electricity to prevent this "invisible killer", and to pay attention to moisture.

2 Avoid long-term fixed image

Early plasma products in a long time after use prone to the phenomenon of localized scorch the screen, so the screen long stay in a screen, just like people do not quite work and no rest in each state of the plasma chamber shine long the same circumstances, the screen will stay on the screen like a shadow lingering. So be sure not to let the long-term plasma TV on the same screen freeze, to avoid such irreparable damage.

3 Wipe the screen to be careful

On the screen by the electrostatic attraction of dust is inevitable, we often want to clean the screen. But did you know that if improper cleaning can also cause damage to the screen, and then to the quality of the effects regret. First, wipe the screen not too often, and the best special screen cleaning material or soft cotton cloth. Also, lcm module do not use chemicals to clean, otherwise it will damage the screen surface is used to enhance the effect of the oxide protective film screen. Water is not very good cleaners, because it will leave water marks on the screen. It is preferable to use a plasma screen cleaner.

4 Remove TV technician to please

If you need to remove plasma TV, be sure not to do it yourself. Because you do not know what parts more critical components, damage to yourself once a key component will cause TV Mishap, so then may outweigh the need to replace parts. And with the high-voltage plasma screen is, and very easy to dismantle an electric shock, this is closely related to life events. Refrain from reckless act.

How to solve the mosaic screen Huaping phenomenon of aging and

LCD splicing screen because it is easy to work long hours to make certain pixels overheating, once more than the limit will lead to permanent damage , which formed often say " dead pixels ." Since Character LCD Module splicing screen pixel is constituted by the LCD , so when the full load continuously for 96 hours or more , it will accelerate to its aging , even when serious burn. So, if you must work long hours , it is best able to let it rest for a while intermittent , or often in different time intervals to change the screen contents appear , because the state is waiting for work to reduce the brightness , or in screen saver mode operate under a will , which require little effort not only retard aging of the LCD screen , and avoid hardware damage occurred .

In addition , LCD whether any problems , prohibit self- assembled LCD splicing screen ( special is especially interested in the general DIY ) , once the LCD splicing screen is not working properly you can find vendors to help solve. Since the LCD backlight assembly transformer off after a certain time is still possible with the 1000V high voltage ( albeit micro-current ) , not specialists if not handled properly may result in failure of the new component .

Moreover , COG LCD Module screen is very fragile delicate, impact resistance is poor. This is because the LCD contains a lot of precision glass element and agile delicate electrical components , once subjected to strong shock will cause the LCD screen , and other related components damaged. So be sure to avoid strong impact shocks. At the same time , but also pay attention not to exert pressure on the LCD screen surface , such as a screen with a finger pointing the site , it is very likely to cause dead pixel number of moves.

Besides, if find LCD splicing screen surface dirt , accurate method should be used to remove dirt . It is best to use a medium soft, non-fibrous material, such as cotton , lens tissue or a soft cloth, and then gently wipe stained with a little glass cleaner , prohibit the use of alcohol, a class of chemical solution , nor can the rough cloth or paper items , as these substances prone to scratches. Here to remind everyone that , do not spray cleaning agents directly to the surface of the screen appear , it is very easy to flow inside the screen causes the OLED Display screen internal short-circuit fault , resulting in unnecessary losses.

Splicing screen Huaping problems

One : Check the Character LCD Display splicing screen and graphics card connection is loose. Poor contact will result in a " clutter ", " noise " is the most common form of Huaping phenomenon .

Two : Check the graphics card is overclocked . If excessive overclocking graphics cards , usually irregular , intermittent stripes. At this time , it should be appropriate to reduce the overclock . Note , first of all to reduce the memory frequency .

Three : Check the graphics quality . If after replacing graphics Huaping problems , and in the use of the first and second trick did not work , the card should be checked against electromagnetic interference and electromagnetic shielding whether the quality of clearance. Specific approach is: some of the parts that may cause electromagnetic interference as far away from graphics card installed ( such as hard disk ) , look Huaping disappears. If it is determined that the electromagnetic shielding function graphics , but off , replace the video card, or home-made shield .

Four : Check the lcd module splicing screen resolution or refresh rate is set too high. LCD splicing screen resolution is generally lower than CRT monitors , if more than the manufacturer's recommended best resolution , there may Huaping phenomenon.

Five : Verify installed an incompatible graphics card driver. This is generally easy to ignore , because the graphics driver updates faster and faster ( especially NVIDIA graphics card ) , some users are always eager to install the latest version of the driver . In fact , some of the latest test version of the driver either , either graphics or game for a specialized version optimized for the use of such drives can sometimes lead to the emergence of Huaping . Therefore , it is recommended that you try to use Microsoft-certified drivers , the best use of graphics drivers provided by the manufacturer .

Six : If you use more than five strokes later, still can not solve the problem , there may splicing OLED Module screen quality problems. In this case, replace the other monitor to be tested.

Teach you choose the best low-cost monitors

LCD monitor when using the computer in our daily electronic devices take a long time to face , and the display is radiated more products , for large brands of LCD monitors its internal layout is more reasonable , done in the electromagnetic radiation shielding is in place .

Metallic shield layer is indispensable to monitor the original low

Electromagnetic radiation is the electromagnetic energy in the form of electromagnetic waves propagating through space phenomenon , OLED Display it is commonly referred to as the propagation velocity of light. Electromagnetic radiation according to their wavelength, frequency arranged in a number of frequency bands , the formation of the electromagnetic spectrum . The higher the frequency the greater the energy of the quantum of radiation and its biological effects is stronger .

The liquid crystal display screen electromagnetic radiation best approach is covered in a metallic shield radiation . We understand that the metal shield may be cut off the spread of electromagnetic radiation , but also conducive to heat transfer . From disassemble the figure we can see that the metal layer does not need very thick , just and accurate coverage of the radiation source to solve the problem . But the cottage manufacturers will still be the overall cost in order to solve these parts. ( Such as sales of low-cost display appearance of the material made ​​of metal , which is also without care, the same metal can shield electromagnetic radiation )
Our approach: Although the choice to choose when the monitor heavy weight , but there are cottage within the display with the addition of other insignificant weight , so that consumers can not tell. So the easiest way to purchase a flat hand will monitor ( screen facing up ) , lcd module another person on the phone to the back of the display , such as the signal format becomes less , it indicates that the monitor has a metal shield , and in the work . Of course, this method is somewhat time-consuming, but also need to disassemble , can be considered a very simple way .

Optional TV not just look at the panel

LCD panel LCD monitors can largely determine the brightness , contrast, color , viewing angle , the LCD panel is fast developing part of the LCD panel and LCD monitors are very closely linked, its production , and marketing pros and cons environment and other factors bearing on the quality of the LCD display itself , price and market trends, as an LCD monitor about 80% of its costs are concentrated in the panel, then let consumers buy TV time as long as attention panel everything will be fine yet ?

Let the salesperson at the store in consultation television , they tend to talk about a TV panel with you , usually they will give you about the advantages of television , and then let the other TV and its own TV comparison , another thing to You What indoctrination ; " original screen ,graphic lcd display module the best performance . Which screen with Taiwan , the general quality " sort of argument. So this argument has no real basis for it ? Let 's explore it.

It is understood that compose an LCD TV parts including: LCD panel, backlight control, image processing circuit , the external interface circuit and housing . Certainty on the quality of which play a role in the panel , the backlight and the image processing circuit section tube . A good TV is not a simple superposition of these parts , need to be very careful design and adjustment.

Like " bucket theory ", as affecting the performance of the TV to watch a lot of factors . For example, the number of bit processing circuit , the dynamic picture compensation / optimization technology , a TV signal reception and processing power and so on. Although the lcd module panel on the machine's cost and performance occupy an important position , but if we just blindly pursue this one indicator is advanced , it may fall into one and runs counter to the original intention of the point .

LPL biggest feature on -screen using IPS technology, with high viewing angle , fast response , accurate color reproduction , cheap advantage. The main disadvantage is the poor performance of black , more prone to leakage problems . LPL pixel screen showing a relatively large scale shape. S-LCD LCD panel, belonging PVA (PatternedVerticalAlignment, vertical alignment configuration ) VA technical areas , is the successor of MVA technology and developers . And its overall performance has not lag behind the latter , has a wide viewing angle and fast response time , pixel is scaly , but more than the shape of LPL much smaller scale .

LCD splicing screen "war " LED display

Customers often consult the difference between lcd and led , LCD splicing screen with LED display which is better ? Here a more comprehensive explanation of the difference between the next lcd and led in the end is what ? LCD splicing screen with LED display characteristics and main applications in what place ? led and lcd difference really so great?

I. What is LCD? What is the lcd module splicing screen ?

LCD stands for liquid crystal displays. LiquidCrystalDisplay , mainly TFT, UFB, TFD, STN LCD and other types of procedure entry point could not be located in the dynamic link library .

LCD splicing screen with LCD display unit splicing of the way through splicing control software system , to achieve the effect of a large-screen display splicing screen body . There are now common splicing 5.3MM 55-inch ultra-narrow LCD splicing , 6.7MM 46-inch Ultra Narrow mini lcd module splicing screen , 47 -inch LCD stitching, 60 inch and 40 inch LCD Video Wall Narrow LCD splicing system .

Second, what is LED? What is a LED display ?

LED is the acronym for Light Emitting Diode LightEmittingDiode . LED applications can be divided into two categories: one LED display ; Second, single-tube LED applications, including backlight LED, infrared LED and so on . LED display now , China's basic design and production technology level and international synchronization. LED display is formed by light-emitting diodes arranged in a display device 5000 yuan a single computer configuration . It uses low- voltage scan driver with : low power consumption , long life , low cost , high brightness , less failure, large visual distance and other characteristics .

LCD splicing screen features

1 , high brightness

LCD screen with TV and PC compared , DID LCD splicing screen has a higher brightness. TFT LCD Displays TV or PC screen brightness generally only 250 ~ 300cd/m2, while DID LCD screen brightness can reach more than 700cd/m2 .

2 , High Contrast

DID LCD splicing screen has a 1200:1 , even up to 10,000:1 contrast ratio, than conventional LCD PC or TV to more than double the normal projection of three.

3 , better color saturation

Ordinary CRT color saturation of only 50 %, while DIDLCD can reach 80% -92 % of the high color saturation , which benefited from professional development products for the DID color calibration technology , through this technology, in addition to still images color calibration, but also on the dynamic screen color calibration , so as to ensure accurate and stable image output .

4 , a wider viewing angle

PVA (PatternedVerticalAlignment) technology that is " vertical image adjustment technology" , the use of this technology, viewing angles up to dual 180 ° ( horizontal and vertical )OLED Module .

5 , better reliability

Ordinary LCD TVs , PC monitors design, does not support the night of continuous use , DID LCD screen for monitoring center, exhibition center designed to support 7x24 hours of continuous use .

6, pure flat panel display

LCD flat panel display equipment , is truly flat screen monitors , no curvature at the big picture , no distortion.

7 , slim narrow design

DID have a large product display area at the same time , there are thin , light weight advantages , easy to splice and installation. Splicing dedicated LCD screen, narrow its excellent design , making it the edge even in a single centimeter or less, such a small edge effect will not affect the overall display screen .

How to identify the original color TV

As living standards improve, everyone on the brand and quality appliances are increasingly critical, while imports of household electrical appliances will naturally be more popular. But in the purchase process, consumers are buying is difficult to clearly identify whether imported appliances is original .TFT LCD Displays By following highlights we will be better able to distinguish whether you purchase home appliances original products .

First , look on the box is printed with the trademark or brand , its upper right corner or small fonts printed on the bottom right corner of the word , and only after the registration of the company recognized the quality of products , the right to use this package , while the cottage or counterfeit there will not be such a logo. Meanwhile, in the electrical back cover will usually be clearly identified producing countries ( such as Japan MadeinJAPAN) or production areas ( such as Hong Kong manufacturing MadeinHongKong), through which identity can be distinguished in the local manufacturing or in the overseas subsidiaries. Some appliances not marked origin, can be checked by using the manual ,COG LCD Module  if the instructions printed on the printing Home location can be determined that the product is assembled in the production .

Second, cottage or counterfeit often use to add, delete , change the way of foreign brands to imitate , and even that is a complete theft trademarks to cheat . At the time of purchase , the consumer must pay attention to the product packaging or instructions on the label which company produced , in order to confirm whether the company's products.

Look at the LCD panel

IPS Panel : IPS panels are the advantages of high viewing angle , fast response , accurate color reproduction , the LCD panel of high-end products . The display panel technology enhances the dynamic display , watching sporting events, action movies and other sports program is faster to get a better picture quality. Carefully look at the screen ,16x2 lcd display if you see is the direction toward the left scaly pixels , plus hard screen , then you can determine the IPS panel .
PLS panel: Currently advertised professional screen IPS display viewing angle can reach 178 degrees , according SMD introduced the newly developed Super PLS screen viewing angle has been significantly improved once again , doubling compared to IPS . Not only is the viewing angle has increased substantially, new LCD screen brightness increased by 10% compared to IPS ; By eliminating the need to use a polarizer and other expensive parts, the production cost of the LCD screen is also reduced by 15% .
MVA panel : MVA panels are now used more high-end LCD panel type , belonging wide viewing angle panel . MVA It is the use of the LCD at rest is not a traditional tower , but a biased point of rest ; when voltage is applied to the liquid crystal molecules changed to allow the backlight level much more quickly through , so that we can significantly shorten the display time , but also because of changes to the LCD 20ms or less. Molecular alignment , allowing wider viewing angle . On the increase in the angle up to 160 degrees.
TN panel : TN panel in addition to a relatively low cost , but also has a more rapid response time , which is only from the performance parameters can be seen : a lot of TN liquid crystal display panel after the overdrive , its value can be achieved 2ms or 1ms, which for gaming enthusiasts, the response time is a very important indicator , 128x64 oled this is the advantage of being TN panels can not be replaced .
Before the mainstream market, the LCD panel display with a wide range of products available at present wide viewing angle , the conventional TN panels still still play it to the heat. The design and function of these panels there is a very big difference , reflecting the display industry step by step development of the track. Combinations between different panels created a monitor has different strengths and advantages , the difference of expression to give consumers more choices.

LCD splicing screen routine maintenance of dirt cleaning tips

LCD splicing screen is no longer a luxury few decades ago , along with the popularization of intelligent LCD splicing screen applications are increasingly being used as the LCD splicing technology LCD splicing screen life has also been extended , ordinary LCD splicing screen backlight life of 10,000 to 30,000 hours , while the LCD splicing screen backlight life can reach 5-10 million hours or more , of course, with our daily maintenance is closely Contact our routine maintenance not only the life of the LCD splicing but also has a significant impact on the relationship between LCD splicing screen display effect when used , so the LCD splicing screen for routine maintenance is necessary .
Maintenance of the LCD splicing screen , we have involved in the clean-up of dust , a seemingly simple operation actually there are a lot of tips on cleaning up the dust when the surface of the screen .lcd module First, we can at the screen with mouth blowing gently , gently blow off the dust on the screen . For that part did not blow off the dust , use a dedicated LCD cleaning cloth stitching on the LCD screen gently wipe , wipe when the attention of the force should be small , do not use the screen to rub vigorously . Clean fingerprints on the screen . Clean fingerprints on the screen need to use special screen cleaner and a dedicated LCD cleaning cloth , first we dedicated LCD splicing screen cleaner pour a little to a dedicated LCD cleaning cloth , and then use the dedicated LCD cleaning cloth fingerprint area gently wipe , wipe clean with a dry soft towel to gently wipe the screen clean.
Clean up the oil on the screen . For the need to use alcohol, with a dedicated LCD cleaning cloth stained with a little alcohol , and then gently with oil in the area gently wipe , wipe clean with a dry towel immediately after the wipe clean the screen . Can not dip too much alcohol , alcohol will have a corrosive effect screen , wipe with a towel immediately after going to wipe the screen .
Here we must be reminded that when the Character LCD Modules splicing wall profiles found dirt , put another way to use the correct dirt quit . Use the best media is soft, non-fibrous material , such as cotton , lens tissue or soft cloth , etc., and then stick a small amount of glass cleaner wipe it quietly agent to stop the use of alcohol a class of chemical solution , nor can the rough the cloth or paper goods , since such materials prone to scratches. Here to remind you that , do not spray directly into a clean economy presents on the screen , it is easy to flow inside the screen so that the external LCD screens showing short obstructed, resulting in unnecessary losses.

Chargers and common mode noise

Capacitive touch screen devices is a major problem is that the charger emits high-frequency noise intensity touch performance will decline. Some mobile devices plugged into the charger only provide limited touch capabilities, or connect the charger does not apply when the device can not use the charger display information, in order to cope with high noise charger issue. The best solution to say it is not perfect.graphic lcd display module A quick look online forums and message boards related information, we can find a touchscreen device by charger noise problem is widespread and has made some consumers feel a headache.
Just as a standard USB charging interface rapid promotion in mobile devices, which also spawned a large number of low-cost aftermarket option market charger. Many chargers are more concerned about cost issues, without attention to performance, these chargers using inexpensive components, or the lack of common-mode noise can help reduce specific components.
The power and ground supply voltage with respect to ground voltage fluctuation, but between maintaining the same pressure, it will form a common mode noise. Such fluctuations only in the ground-coupled fingers touch screen that can affect the performance of the touch screen. Finger pressed with the same electric potential, mobile power and ground relative to its volatility will lead to noise injected by a finger touch screen. The amount of charge injected depends on the peak-to-peak voltage of noise.
In addition, the amount of the charge transport is also affected by two factors significantly affect: the fingers and the contact area between the touch screen and the touch screen overlay thickness of the lens.
The higher the capacitance, means injection of the touch screen, the greater the noise. In this case, the capacitance of a parallel plate is formed on one side by the finger contact area, the other side of the reception by the touch screen sensor electrode. First, TFT Display Module with the finger in contact with the touch screen area increases, the capacitance also increases accordingly proportional. However, since the receiving electrode from extremely narrow row or column form, the actual function of the diameter of the fingers.

LCD splicing screen technology applications at the mall

Supermarkets, department stores , specialty stores and other large establishments often have some discounts , events and other information, with its large screen LCD splicing screen , full HD , etc. can make these exciting places information in terms of how much space is to the fore, show to every one to patronize customers, thereby promoting consumption ; Meanwhile, narrow , ultra-narrow , seamless large-screen color lcd display module splicing system can also be advertised in the above large establishments , make the picture vivid and bright , bright delicate display even in a busy mall also stand out from the noisy environment , seize the attention of new customers to bring more new business opportunities !
LCD splicing screen application analysis :
1, large , high-definition lcd module video wall mosaic showing all the mall can be the perfect product , no matter in which area , space, angle can attract consumers with a good eye , user-friendly shopping needs ;
2 , Play product discounts , events and other information, to attract more users to the consumer, and thus bring more benefits to the mall ;
3 , shopping malls larger flow of people , can its excellent , perfect picture playback businesses product or corporate advertising , to the mall to bring additional advertising effectiveness.

Factory network video surveillance system analysis

Factory video surveillance system preliminary design to meet the needs of existing resources and network performance , front-end video capture subsystem , the monitoring center video management system construction are to meet the Ministry of Public Security "to carry out urban Security Alarm System Construction Work" performance requirements , and strive to run the system is stable , reliable data storage , archiving video data on a regular basis .
First, the video surveillance system to protect plant and public activity areas of staff safety , security equipment and other important facilities and property safety , prevention of sabotage activities, and accidents , the first time made ​​the process of incident recording, handling and accountability for the timely provide strong evidence .Character LCD Display This is the basic function of video surveillance requirements. Another important aspect of the video surveillance system can be factory daily production process , play a supporting role in the production , production line unattended .
According to government requirements and internal management of production safety regulations , and in accordance with the relevant national standards , combined with the plant needs to develop a network video monitoring video monitoring system functions to achieve the following objectives:
1 ) Video capture function: capture video front-end video capture system and follow the transmission requirements for compression , encoding , converts through Access Gateway , meet in a digital format of the information transmitted over the Internet exchange .
2 ) video transmission function: After compression, encoding video information , in accordance with the work flow in a factory dedicated network for transmission , according to the security management authority, constitute transmission network system at all levels . Same time be able to meet the monitoring system management needs, transferred to the superior system and stored.
3 ) The information processing functions : Distribution of the received video information system, etc., COG LCD Module according to the classification and attribution video processing, the call processing information stored .
4 ) video storage and backup functions: video monitoring center server information, system logs should be stored historical data storage and backup information is available in a network system based on permissions playback.
5 ) System Control Function : According to authorized users of the network control command sent to the front-end system, the monitoring center and authorized end users to call any way monitor images and control.

Nonlinear distortion of the video signal

Signal distortion caused in the transmission signal itself to be transmitted related to the amplitude ,20x4 lcd display this distortion , said nonlinear distortion between the input signal the output is not a simple linear relationship. Equation : U2 = K (U1) U1, the transfer function K (U1) is not only a function of frequency or time , and is a function of the input signal .
Nonlinear distortion caused by the nonlinear components , and their effect on the parameters with which the signal level is changed ( by the size of the impact signal level ) . Transmission system nonlinear dynamic range and signal related to a wide range of distortion from the signal components can be divided into the following:
· Luminance signal nonlinear distortion
· Chroma gain nonlinear distortion
· Chroma phase nonlinear distortion
· Chromaticity ,lcm module luminance intermodulation distortion
· Differential gain
· Differential phase distortion
And synchronization signal static nonlinear distortion
· Synchronous signal dynamic nonlinear distortion
6 line time waveform distortion
Reflecting the line frequency to 500KHz IF distortion , on behalf of the larger size of the image content changes in brightness in the horizontal direction , frequency distortion will cause the image horizontally ill , causing severe horizontal tail, somewhat similar to the RGBHV signals "LF response bad "fault.

Splicing unit slim and lightweight LCD liquid crystal mosaic

English full name of the LCD Liquid Crystal Display, LCD is the structure of two parallel glass in which the liquid crystal placed , two pieces of glass with a plurality of vertical and horizontal center of the small wire rod through the energization to control the crystal or molecular changes direction , reflecting the light generated screen.
LCD consists of two glass composition, thickness of 1mm, during which the liquid crystal material containing a uniform distance apart . Because the liquid crystal material itself is not light , so both sides of the screen with the lamp as a light source , and in the back there is a backlit lcd module panel ( or even light panels ) and reflective film, backlit panels are composed of a fluorescent substance can emit light , its main function is to provide a uniform background light .
Light emitted by the backlight passing through the polarizing filter layer after the first layer containing the liquid crystal droplets thousands crystal layer . The droplets of the liquid crystal layer are included in the small cell structure, one or more cells constitute one pixel on the screen . Between the glass and the liquid crystal material is a transparent electrode , the electrode is divided into rows and columns , the intersection of row and column , the voltage is changed by changing the optical state of the liquid crystal , the liquid crystal material acts like a small light valve .
The liquid crystal material is the control circuit portion and a peripheral driving circuit portion . When the LCD of the electrode generating an electric field , the liquid crystal molecules will be distorted , and thus will pass through one of the refraction of light in a regular , and then through the second layer of the filter layer filtering is displayed on the screen .
The LCD is only in recent years developed a splicing technology , its greatest advantage is its low power consumption , light weight , long life, no radiation, screen brightness uniformity , OLED Module etc., but the biggest drawback is that LCD larger patchwork . Only a fraction of a millimeter and DLP patchwork is unable to compete . The display requires very sophisticated users, a little bit of regret , which is currently only occupy LCD splicing key factor in low-end market .
To reduce patchwork , patchwork gives users reduce the interval sense , LCD manufacturers have been stitching also constantly work with. In recent years , has introduced a more narrow patchwork LCD splicing unit , from the initial 7.3mm, to 6.7mm, and then in 2011 launched a new 5.5 mm LCD splicing unit , lead the way , and continue to get a breakthrough in terms patchwork , setting off a wave of LCD splicing again and again .

Touch screen use and maintenance points

Due to technical limitations and equipment in different environments, as water droplets on the screen, dust and other contamination does not work properly, so the touch screen is also the same as with ordinary machines require regular maintenance. And because the touch screen is a variety of electrical equipment highly integrated touch one machine, so the use and maintenance should pay attention to some of the following questions:
A) before turning on the screen with a soft dry cloth;
2) water or beverage falls screen causes the software to stop the reaction, which is due to water droplets and the finger having similar characteristics, need to wipe the water droplets;
3) Touch screen controller can automatically determine the dust, but too much dust will reduce the sensitivity of the touch screen, Graphic LCD Display just use a dry cloth to wipe clean the screen;
4) application of glass cleaner dirty fingerprints on the touch screen and oil;
5) strict accordance with procedures and off the power, turn off the power in the reverse order;
6) generate a large number of temporary files on your hard drive, or if you frequently break off without exiting Windows directly, will soon lead to hard disk for errors. Therefore, the need to periodically run Scandisk scan the hard disk error, the application can set the password for the best way to exit the application and Windows re-power;
7) pure touch screen program does not require the mouse cursor, the cursor will only make the user can not concentrate;
8) should choose the most adequate application uses a simple anti-mouse mode, because of the complex model requires sacrifice latency and system resources;
9), as the deteriorating environmental conditions, periodically clean the touch screen to open the nose and the inner surface of the reflective stripes. Specific method is: Open the cover on both sides of the machine, you can find the front nose withhold release latch organs, open the body to release the latch. Lift the front of the nose, you can see the touch screen control card, unplug the touch screen cable, removable head to head back and touch screen. Look carefully at fixed touch screen method, remove the touch screen cleaning, be careful not to use cardboard or hard cloth, Character LCD Modules do not scratch the reflective stripes. Finally, in reverse order and the original structure will head recovery;
10) belong to man-machine interface touch-screen machine control engineering Copyright, fever than larger, it is necessary to take on the touch screen to cool the body and the surrounding environment measures.

Touch-screen technology used in industrial control application

I. Overview
Industrial touch screen, industrial display by touch even as one of the men and machines of the intelligent interface. It is an alternative to traditional control buttons and indicator lights intelligent operation display terminal. It can be used to set parameters, display data, monitor device status, to curves / animation and other forms depicting automation control process. More convenient, more expressive, and simplify the control program for the PLC, powerful touch screen to create a friendly interface. As a special touch screen computer peripherals, it is the most simple, convenient, a natural human-computer interaction. It gives the media a new look, is a very attractive new multimedia interactive devices.
Second, the principle of industrial touch screen
Touch screen system generally includes a touch screen controller (card) and touch detection device in two parts. Among them, the touch screen controller (card) The main role of the touch point detection device to receive touch information CONTROL ENGINEERING China Copyright, and convert it into contact coordinates, and then sent to CPU, it also can receive commands sent to the CPU and to be implemented: touch detection device is usually installed in front of the display, the main role is to detect the user's touch position and send it to the touch screen control card.
1 Touch Display Module
Resistive touch screen screen body part is a match with the display surface of the multi-layer composite film by a layer of glass or plexiglass as a grass surface is coated with a layer of transparent conductive layer control engineering Copyright, above and then covered with a layer of outer surface hardening treatment, smooth scratch-resistant plastic layer, an inner surface of which is coated with a transparent conductive layer between the two conductive layers are many small (less than one thousandth inch) of the transparent insulating isolation points separate them .
When a finger touches the screen, usually two conductive layers insulated from each other in touch with a contact point, because of which a conductive layer is connected to the Y-axis direction 5V uniform voltage field, making the detection of the voltage from zero to zero, this is detected by the controller on-state after the A / D conversion, and the voltage value obtained can be compared to 5V Y axis coordinates of the touch point, the coordinates of the same reason, the X-axis This resistive touch screen technology is that all the common basic principles. Resistive type touch screen technology is the key material. Lead resistance screen according to number of hours, divided into four or five lines, six lines, multi-wire resistive touch screen. Resistive touch screens in the glass surfaces were painted two OTI transparent conductive metal oxide layer, the outermost layer of OTI as a conductive coating, the second layer precision through OTI is attached to the network anyway in both directions of +5 V to 0V voltage field, OTI between two layers of transparent to small isolated point separated. When a finger touches the screen,OLED Module two conductive layer OTI will be a contact point, the computer detects the voltage and current simultaneously calculate the location of the touch, the reaction speed of 10-20ms.
Five-wire resistive touch screen of the outer conductive layer using good ductility nickel deposit coating materials, the outer conductive layer due to frequent touch, use good ductility nickel deposit materials in order to prolong life, but the technology costs more expensive. Nickel-gold conductive layer scalability is good, but only for transparent conductors, is not suitable as a resistive touch screen face, because it is high conductivity, and the metal is very difficult to achieve a uniform thickness, suitable for voltage distribution layer, only as a probe layer.
Resistive touch screen is a completely isolated from the outside of the work environment, not afraid of dust and water vapor, which can be used to touch any object that can be used to draw and write, more suitable for industrial control and office use. Resistive touch screen is a common drawback is that because the outer layer of the composite film with plastic material, people do not know or use too much force may scratch the whole touch sharp touch screen scrapped as a result. However, within limits,TFT LCD Module only scratch injured outside the conductive layer, the outer layer of conductive scratch for five-wire resistive touch screen is not related, while the four-wire resistive touch screen is fatal.
2 logic control and communication modules
Logic control module contains the 24V DC input (18-32) power, SDRAM memory and CF memory cards, 10/100BaseT Ethernet ports can be used for file transfer, printing and communication with the programmable controller 232 serial port that can be used to connect mouse, keyboard, or print meter USB port. Embedded in the circuit board inside the CPU chip, charge of the display input, output and processing of communication data. Communication module is responsible for a particular network transport, in order to improve the data transfer rate.

Narrow LCD project implemented several key points

55-inch Ultra Narrow LCD Video Wall LCD55, most Narrow LCD bilateral patchwork of only 5.3mm, LCD splicing hit a current listing of LCD splicing products patchwork narrowest record , but also the first time exceeded the LCD stitching patchwork 6mm or less, which also indicates that LCD display market will usher in another round of development climax.
A complete set of large-screen LCD splicing systems, in addition to the forefront of the screen , the will to involve computers, networks , video surveillance, integrated wiring and numerous peripherals and many other devices , these features also created a large-screen LCD splicing system install complex and difficult characteristics. In fact, in addition to these features , the large-screen display system for engineers not only have excellent engineers and technicians , but also have strong project management and operational capacity , only to have these features in order to respond flexibly to various installation projects .
LCD splicing project proposal : large-screen lcd graphic display splicing system project can be divided into four distinct phases , namely: project planning, preliminary survey , project implementation and post-project . Among these four stages , pre- survey and implementation of the project is very important, if these two stages in the implementation process problems, will seriously affect the progress of the projects and the quality of the projects . Before the implementation of the project -based investigation and implementation of two parts which need to pay attention to what ?
First, the LCD splicing preliminary engineering survey points: pre-construction survey in addition to the construction site in person to understand the investigation , they also need to conduct a detailed and customer communication , and make the overall construction project planning , as these largely determine project cycle length , cost control, and the presentation of the final results , it is necessary to pay special attention.
1, first : Install the equipment on the ground to be flat. Because the entire LCD large screen splicing system weight is very large especially rear stitching, its technology determines its cabinet is very large, and very heavy, so if the floor is ceramic tile installation of equipment , it must first confirm whether it can withstand such weight , Graphic LCD Module preferably fixed on another device antistatic floor on the ground, in order to ensure long-term ground by heavy deformation.
2 , followed by the wiring : LCD large screen splicing system wiring, power lines and signal lines to be separated in order to avoid unnecessary interference with the signal ; another large LCD screen according to the specifications , the cabinet position , the signal source location is calculated required for a variety of cable lengths , number of joints and the signal line names. But also confirm with the customer , project pipeline channel is available to meet the actual needs, in order to continue follow-up work .
3 , ambient light : Because LCD splicing screen brightness of the product is relatively limited, if the system's ambient light is too bright , the picture effect would have been affected . Under normal circumstances, required within 4 meters in front of the screen is dark , it is best not to install fluorescent tubes can be installed concealed downlights , light to shine directly on the screen can not and must have a separate switch. In addition to the installation of tube lights and large screen devices in parallel , try to make the work area has adequate lighting , but will not have a significant impact on the screen , the screen may be near the incoming light ( such as windows ) , if necessary, to be blocked while the device is running best to turn off the light , in order to ensure normal operation of equipment .
4, the framework requires : Considering the LCD splicing screen installation and ease of maintenance , the frame must be removable edging edging . Outside the framework of the fight away from the wall along the side ( up and down about four sides ) set aside about 25mm clearance on each side , a large video wall should be increased according to the number of columns margin . In addition , in order to post into the box maintenance, repair channel principle is not less than 1.2m wide. Removable side bar to hold the edge of the screen 3-5mm is appropriate, in the box and the screen is fully in place, and finally fixed removable trim.
5 , air-conditioning ( depending on the project may be ) : In the pit lane , the need to install air-conditioning or outlet, ensure that the ventilation equipment in good condition . Outlet should be located as far away from LCD Video Wall (1m or so good ) , and the outlet box directly facing the wind can not blow hot and cold in order to avoid uneven screen damage .

Large-screen display technology advantage analysis

From space, time limits video conferencing has become the most popular business conference modes, large-screen display solutions through convenient Internet transmission lines and commercial LCD display with high-definition multimedia display device , the ultra-high -resolution images and CD -quality stereo audio, and real-time transmission environmental conditions , Character LCD Modules so that participants feel immediate and interactive communication , provide the user with an immersive "face to face " experience .
Currently , video conferencing solutions have been widely used in many Fortune 500 companies , effectively saving enterprise travel costs, so that the work efficiency of decision making has been effectively improved.
In recent years , the domestic market, large-screen mosaic wall , the LCD display wall products meteoric rise to become the industry is a major bright spot. LCD splicing technology, as a new large-screen application technology categories , and its unique features are becoming market applications to change the traditional pattern of tiled display great strength . Taken to prison + control room, Graphic LCD Module into the commercial center for the characteristics of the liquid crystal display wall products are becoming more widely achieved within the traditional DLP Video Wall can not do all sorts of miracles.

LCD LFD large-screen system technology advantages

LCD46H splicing LCD large screen display system is designed according to user needs . It the most remarkable SAMSUNG DID LCD high definition ultra narrow digital display technology, splicing technology , multi-screen applications such as image processing technology integrated into one , forming a high-brightness , high- definition, high intelligent control , 192x64 lcd methods of operation advanced large screen display system .
Through this LCD large screen display system can achieve the production dispatching system computer image and video image information together, show that the formation of a fully functional, technologically advanced displays images and information management control systems for video surveillance, multimedia display , production , scheduling, monitoring needs , and complete replace the existing analog screen for public display,lcm module monitor , manage to provide an interactive and flexible system to adapt to the evolving public displays , meetings, production, scheduling work . In order to make timely judgments and processing, real-time monitoring and centralized control.
We designed this LCD large screen display system has a number of important industries in the domestic large-screen display applications system use, and the industry and users alike !

True green LED TV

LED backlighting and edge light is an important factor in the rise of the implementation of the EU RoHS Directive . The Directive stipulates that from 1 July 2006 onwards, the EU member states to eliminate sales of electronic devices in the lead, cadmium, mercury , OLED Module hexavalent chromium , polybrominated biphenyls and polybrominated diphenyl ethers and other substances. And Mercury is CCFL lamps and other types of fluorescent lighting the main ingredients. LED lights then do not use mercury.
In power consumption , compared with the ordinary CRT TV , flat panel TV power consumption considerably , many consumers of the energy situation on TV are quite concerned . It is understood that in 2008 sales of 12 million flat-screen TV , such as by working four hours a day every TV , lcd module every year on the need to consume 2.4 billion kWh of electricity , the equivalent of several large sum of annual generation capacity of thermal power plants .
The LED brightness can be carried out with the initiative to adjust the screen brightness , energy efficient compared to LCD TVs can reach more than 30% . This performance in some dark scenes images , only need to adjust the backlighting of the necessary area ( on the screen showed black or dark part ) local lighting , which can to show you a chiaroscuro effect of natural high-quality images .

Large-screen LCD splicing Security Industry Solutions

With the large screen display applications more widely, but for different areas of the terminal display device requirements are different , resulting in industry- differentiated demand for more and more significant . So, faced with different industries to provide targeted solutions is becoming more important , professional sound solutions for the industry has naturally become a major competitive market between manufacturers one of the factors .
For LCD splicing products,TFT LCD Display by virtue of its high-definition display, flexible mosaic pattern , thin body , long life and energy-saving environmental protection and many other advantages , the relatively high requirements for patchwork of small fields monitoring collar favored. SME 's command and control the contents of the main display video signal based, for the integrity of the screen is not very high , more is to consider how to use the LCD splicing alternative to upgrade the old-fashioned CRT display device , as a relatively cost-effective LCD splicing high, so the LCD splicing in the field of security applications are more and more attention .
For the application of the security industry large-screen, displays the contents of the security industry due mainly to monitor the main screen , monitor screen is relatively independent , so the picture is not roaming and superimposed strong demand , of course, some of these more complex security monitoring block is indispensable . In general, small and medium sized project is no need to configure the splice . On the other hand ,COG LCD Display a relatively large screen of the security industry , and often have been encoded preceding signal into a digital signal, if the big screen on even before then decoded into an analog signal , which will reduce the display , will increase the cost of equipment . For the application of the security industry big -screen feature , manufacturers have to set its own brand of proven solutions , it can well meet the needs of customers the security field .
With LCD splicing technology continues to mature and the costs continue to decline , LCD splicing positioning become more " people" , and LCD splicing system incorporates more networks, smart technology, continuously expand the field of application , the future market prospects are very broad .

Large-screen LCD splicing debugging method correctly interpret

LCD splicing both individually as a monitor , they can assemble into large screen use . According to different needs and achieve big variable is also variable small Variety large screen features: a single split -screen display , single-screen alone, any combination of display , full-screen LCD stitching, double stitching LCD splicing screen , vertical screen display, image borders optional compensation or cover , support for digital signal roaming, zooming stretching, cross-screen display , a variety of plans to set up and run display , full HD signal real-time processing . LCD splicing is a complete finished product, ie, hang with , installation is as simple as building blocks , single or multiple LCD splicing are very simple to use and install . lcd module stitching around the edges only 9mm width , surface protective layer also with tempered glass , built-in smart temperature alarm circuit and the unique " fast casual" cooling system. Everything, not only adapt to the digital signal input , the analog signal support is also very unique . LCD splicing series of products using the world's most unique and cutting-edge digital processing technology, allowing users to truly experience the full HD screen effect .
So, so perfect large screen display system really that simple? Answer is no, how to properly debug LCD splicing screen is not as easy as people think .
Normally, LCD splicing system hardware installation does not have a lot of time is also relatively simple , and debugging more complex compared to the latter . Video wall system debugger, the image appears unclear. If the display is not satisfactory , especially in low light , blurred edges of the image (the source resolution is too high) stack aliasing interference fringe image sense ( or drop-frame ) , the result is: a liquid crystal mosaic image does not contain a clear phenomenon. Immediately to determine whether the product is not available. Image, control products, such as system , matrix switchers , splitters, signal transmission cable , transmission, processing and display display terminal , DVD, video cameras, computers , etc., etc. Displayed video source.
Exclude the need to pay attention to two points:
The first : to check the first question bear certain period of time , checks will be deleted once the issue is resolved , you can save time in other parts of the checks can be . First of all, one by one, the only way to form a terminal display resolution and signal source display resolution, not only for point to point , and if this problem is not solved, are excluded from all devices on it to verify the video signal , graphic lcd modules If you want to reach the end dependent on the adaptation or the display format can be greatly improved the brightness of the image , or replace the device's display terminal zoom you can increase conversion device such as the use of that change the nature of the signal , the video signal can be improved VGA video signal .
Second, please see the body to make the losses to a minimum standard distance range image and signal source impedance bandwidth between the matrix switcher. Finally, the focus and convergence of the display device is normal , the signal processing circuit is good. The most important are as follows. High ground , reliable, good line of construction , so that the signal ground , solid interface cables neatly separated , and the force and strict as power, signal lines, such as UPS, AC power connectors at both ends of the total number of tags and manage a simple test .
Analysis: according to the symptoms , if not synchronized , synchronous interface cable, and transmission equipment , control and display terminal synchronizing signal source frequency range of the inspection point. By analyzing the test time is too long, the picture is too small , ghost , transmission cables , to confirm whether it is a solution to increase the signal amplifier and other equipment, or lane changes . Concentrated bad, you can adjust the display terminal.

LCD large screen display wall of the viewing angle

LCD large screen and large-screen CRT display wall , there is still a shortcoming, which is tilted at an angle if the user will not see the image on the screen . For this early use of laptop users must have some experience, using a laptop computer , front screen image is the most clear , if angle is tilted to a certain angle will see the screen image . Up to what point can see the screen images , this angle is the viewing angle. Viewing angle can be divided into horizontal viewing angle and vertical viewing angle . For this shortcoming , LCD manufacturers have made ​​the development of a great effort , and now the LCD viewing angle can reach 140 degrees , in fact, no one actually so inclined angle to see the screen . For professional users, always facing the screen majority.
As for the resolution, brightness , contrast, in terms of these indicators , LCD monitors and CRT monitors basically the same. If the lcd module on the technical indicators perfectly acceptable , and that the only consideration is the price , just a year ago , big screen LCD 's price is unacceptable , the hundreds of million, and now with the LCD mass production , cost reduction , LCD has come to a reasonable price , and with 17 -inch LCD monitor , it is now the price is about 4500 yuan or so, here we should not ignore a problem, that is the same as LCD monitors unlike CRT monitors there is an effective display area , said 17-inch LCD monitor effective display area is 17 inches, which is 19-inch CRT monitor with an effective display area is basically the same . Now 19 inch CRT market price of about 3,000 yuan, the gap between 1,500 yuan, 1,500 yuan in exchange for which zero radiation , screen flicker , takes a long time glued to the screen for the graphics / video design, publishing and other professional field in terms of users is how to enjoy it !
LCD large screen display wall in recent years gradually into people's lives and work of the new display carrier. Due to its stylish, low radiation , energy-saving , space-saving , splicing gap is small, image stabilization, clearly , by the majority of users. With the market launch , the decline in prices , so that more users have the opportunity to use this product. Therefore, using OLED Module wall units , all walks of life began to be promoted and applied . Now has become a large-scale exhibitions , public places, video conferencing, multi-purpose hall , television , entertainment, television monitors and other places essential to the display device.

Soft edge fusion splicing system

Soft edge fusion splicing system is a complex system engineering , usually form a complete set of soft edge fusion splicing system requires the following equipment:
1 screen : the screen to the audience the most intuitive visual impact, screen selection is essential. First make sure the entire screen is seamless , we can ensure picture perfect display .
2 Projector: projector screen to the big screen directly affects the quality of the display, is also very important , so careless . low temperature 128x64 lcd Maximize the use of 3-DMD projector technology to ensure a good color reproduction . End 3-LCD projector can be used, but in the color consistency adjustment above comparison takes a lot of time .
3 Soft Edge fusion splicing processor : soft edge fusion splicing processor determines a large screen display main content and speed of the processor is good or bad , the signal processing speed of the source , the picture resolution , the quality of soft edge fusion , have a role can not be underestimated .
4 Signal processing apparatus :Character LCD Modules  a signal processing device includes a signal source type of conversion, the signal switching , signal amplification and transmission , for large -screen display is very important.
5 . Centralized control equipment : large-screen display system, a wide variety of equipment , number of projectors , matrix number larger than the number of signal sources , centralized control device can better help you quickly deal with the switching signal selection , convenience efficient operation of the control device , the rapid increase in work efficiency and accuracy.
6 Peripherals : Peripheral devices include signal source desktop access systems , cables , connectors , cabinets, power supply and so on.

TFT-LCDCELL process diagrams

TFT-LCDCell manufacturing process of the array after the process, which is based on the Array front glass substrate, a glass substrate and color filter combined and inserted between the two glass substrates a liquid crystal (LC). Main processes include: cleaning, orientation film coated PI layer, friction orientation, printed plastic frame and pad printing Silver Point spray powder, assembly, cutting & lobes, filling liquid crystal detection.

First, the substrate using the lotion, brush, Character LCD Module ultrasound, IR, UV and other devices, the above remove particulates and oil, in order to ensure the cleanliness of the substrate condition.

That has formed on the substrate layer washed 500Ao ~ 1200Ao (0.05μm ~ 0.12μm) PI films uniform. By rubbing the alignment grooves on the PI film manufacturing orientation of the liquid crystal sequentially ordered.

After using the screen printing method, will be required to transfer to the CF frame plastic substrate to provide CF / ITO substrate is then necessary to make the Edge with plastic box. The agent is spread evenly spaced on the substrate for maintaining uniform spacing between the upper and lower substrates.

In stage heating, prompting the box on the CF substrate plastic softening of position after completion of the bit to impose pressure, plastic box by the CF and the ITO substrate adhesion, and finally do the right position fix, complete assembly work. The substrate assembly complete stack neatly sealed with the fixture, to impose a uniform pressure, 320x240 lcd display and into sealed with high temperature baking furnace, the substrate temperature can be maintained 150 ℃, 90 minutes or more to ensure that the sealant is fully cured spaced molding.

The completion of the assembly sealed with glass panels, according to the size of the necessary requirements to breed diamond knife, cut out the cut marks on the glass cutting / lobes.

Panel into the empty vacuum tank, exhaust after impregnation liquid crystal injection port, nitrogen breaking vacuum, using a pressure difference and the capillarity effect, so that the liquid crystal injected into an empty panel.

Attached to the elliptical polarizer on the panel below. Create contrast with its polarizing and phase difference plate compensation chromogenic make the picture clear.

Three-dimensional image display applications

Currently three-dimensional image display is mainly used in the workstation (workstation), comics, cartoons and other animation, medical purposes, educational purposes as well as aviation, automotive simulation teaching, game console and other fields. Such as medical uses stereoscopic endoscopy, stereoscopic microscopes, the use of surgical guidance system, the use of CT, MRI medical diagnosis, visual function tests, Character LCD Modules medical education, medical training and so on.

Although the new generation of three dimensional stereoscopic display resolve many shortcomings, and dramatically increase the viewing stereoscopic range, but it also faces inadequate consumer awareness, expensive, single use only face challenges such as practical. For single use issues, the current plan has drawn more toward the direction of exploring, developing multi-user stereoscopic display,Serial Lcd Display Module in addition to production of precision, mass production and ripple control is one of the items to be overcome. Three-dimensional images expected future market will be with the software and hardware technology continues to expand, which means keep abreast of the pulse of the market, the timely provision of related technologies become more important.

LCD CRT reason out

The mid-1990s, along with the LCD technology matures, liquid crystal display (LCD) as a new display device is also beginning to the market. When the LCD is hand-picked successor to CRT, the user is also devoted more attention to its attention, and also have devoted more enthusiasm and expectations. At the same time, about the shortcomings and drawbacks of lcm module began unrestricted been repeated, which is even let some users began to LCD expressed disdain and dissatisfaction. Coupled with the high price, it seems that in addition to light and environmentally friendly LCD outside, in other places, have no merit:

High response time, and you will have no interest in the game will become

Garbage general color, not to mention the plot is also reluctance to see photos

Life, a period of time the screen will be cast, brightness sharp decline

Contrast, in front of the CRT is simply not worth mentioning

Viewing angle, eyes slightly deflected

These inherent flaws LCD also aroused much controversy, but we need to see clearly, with the advances in technology, these defects are also the long fade out of our sight. Moreover, LCD is more active in the market expansion of the CRT. Past shortcomings and even become LCD comeback killer.

Gray from faster response time, more superior than CRT color performance, close to the limit of the viewing angle and higher contrast, brightness, we take a look at the specific COG LCD Module is how to CRT as deadly!

What advocates locking 19-inch LCD computer

Higher prices also equipped with high-quality

According to Sina an LCD display on the survey results show that more than 1.01 million ballots 82.4% chose the much more expensive than CRT monitors LCD monitors. People hoping for LCD computer psychology is evident.

Analysts believe that if the 15-inch QVGA lcd computer rage is the inevitable demand for consumer health, consumer comfort pursuit spawned a 17-inch LCD PC's popularity, so now the majority of users of visual desire, is bound to 19 inch LCD into the PC market center stage.

19-inch LCD computer text processing is no longer just stay in this level, in the aspect of today's broadband, digital clusters in the world, the computer's multimedia processing capabilities have become increasingly demanding. "A computer can easily and quickly dump a variety of digital devices in the pictures, videos and personalized editing; whether it has a mass of digital throughput, allow consumers freedom to exchange data; whether facilitate contacts, high-speed a variety of audio and video data download and transfer; and, ultimately, whether a customer through a computer interface, to bring consumers a more pleasant shopping experience, will become a 19-inch LCD computer consumers consider the new standard. "experts said," Based on this , including a display area, viewing angle, resolution, or even outside of fashion elements, etc. factors, determines the Graphic LCD Display computer is to 19 inches to the era of rapidly moving into the mainstream. "

Organic thin film deposition process

OLED device in a high vacuum deposition chamber plurality of organic material film, the film quality is related to the quality and life of the device key. In the vacuum chamber has a plurality of heating boat evaporation sources and the corresponding thickness monitoring system, graphic lcd 128x64 ITO glass substrate fixing means, and the metal mask means (Mask). A relatively high vapor pressure organic materials, the evaporation temperature at 100-500 ℃ between, on their characteristics:
1, high vapor pressure (150-450 ℃).
2, easy to decompose under high temperature conditions, volatility.
3, good thermal conductivity foam state.
Depositing an organic material film in the evaporator, the evaporation rate is controlled lose 3-5Å / s, so that the substrate of Φ60 mm film uniformity range of up to 350Å ± 25Å. Heating the boat with good thermal conductivity, easy to control the evaporation rate. Common heating molybdenum boat and tantalum metal heating boat, in order to make more uniform heating, plus quartz boat cover, that the heating be buffered. During the vapor deposition of organic material film, generally the substrate kept at room temperature, to prevent damage to the organic material film temperature, evaporation rate should not too fast or too slow, uneven thickness of the film is too thick. Evaporation of a variety of materials were carried out in several vacuum chamber, to prevent cross-contamination. The production of the color OLED device, comprising an organic dopant material film formation,Lcd display modules to take dopant material with the matrix material of the evaporation process, the general control of dopant materials 0.5-2% (of the number of moles of the matrix material ), required in the control matrix material and evaporation to the strict control of the dopant concentration in the matrix material.

Organic material deposition FAQ

A) the effective use of materials, low
Effective options currently available to manufacturers is very limited, the system designed to be extremely efficient use of expensive organic material and the dopant; Character LCD Display present utilization is generally lower than 10% or less, full-color lower utilization of the production process.
B) dopant (Dopant) is difficult to accurately control the concentration of
With dopant of 0.5 to 1% low dispersion rates, the result of the system, and temperature control, and the physical and chemical properties of the substance itself, such that the concentration ratio is not easy to control, and the concentration of the dopant is an important factor in the device structure, which makes the production process requires precision and maneuverability more difficult.
C) deposition rate instability
Deposition material purity and temperature control system approach led to deposition rate instability.
D) the coating uniformity of the substrate is not
This is mainly because the evaporation source and the heating boat design lack of specificity of the organic material.
E) contamination of the vacuum chamber
Because the material utilization is poor, lcd graphic display so causing a great part of the material may stick to the walls and other parts and become dust sources that affect the manufacturing yield of the device. For deposition coating uniformity enough, the Japanese VieetechJapan company provides a solution to the problem (see below), it is through the narrow mouth wide bottom and large capacity PBN crucible, providing an R & D and production applications loaded on organic material of the device. In particular, it is designed for organic materials Thermoball particles, poor thermal conductivity of organic materials can solve problem of low utilization and materials; with two-stage heating and temperature measurement, PID temperature control system, can be done in a timely manner and to achieve accurate temperature feedback Temperature differences within ± 0.1 ℃, can stabilize the evaporation rate; other special dopant DopantInsert and PID temperature control system, so that 0.5 to 1% of the proportion of constant and stable dopant.

Cleanroom technology applications in several hot issues currently

I. Introduction
Cleanroom air velocity / ACH, has been a concern in cleanroom design issues, with the clean room to increase pollution control results and final stage filter efficiency, etc., on the relevant norms, guidelines and other recommendations made or reference values ​​are conservative, there are many discussions; FFU in the application of the feared noise, damage repair and other issues have been resolved in practice, with the continuous improvement of FFU, FFU on whether to adopt the return air system is also a Hot: Suspended molecular contamination (AMC) control in the microelectronics and IC industry has been growing on the agenda, attention. The following cases were on these issues as summarized and analyzed.

Two. Airflow velocity
2.1 For recommended applications or reference values
Clean indoor air speed under certain cleanliness to determine, with the clean room use and other specific circumstances vary, it is not only affected by the amount of dust and indoor filter efficiency is also affected by other factors, in terms of industrial clean rooms, cleanliness and choices affect flow rate of the main factors are:
(1) indoor sources: building components, the number of personnel and operational activities, process equipment, process materials and processing technology itself, are all dust sources of release, according to the specific circumstances vary, vary greatly;
(2) indoor air flow pattern and distribution: unidirectional flow requires uniform and equal flow lines, but will be subject to changes in process equipment and personnel arrangement and location of activities such as the formation of local vortex interference; rather than unidirectional flow requires sufficient mixing, Avoid dead ends and temperature stratification;
(3) purification time (recovery time) control requirements: clean room or accidental releases of pollutants into the air or gas flow during normal operation is interrupted or intermittent convection currents or other movement of persons and equipment will result in the deterioration of cleanliness , return to the original time to determine the cleanliness of the gas flow velocity purification; the purification time control requirements depend on this time frame (lower cleanliness deterioration), the product of the quality and yield of the production capacity of impact;
(4) the final stage of the filter efficiency: COG LCD Module in a certain amount of dust indoors under high efficiency filters can be used to reduce the flow rate; energy should be considered as a high efficiency filters and reduce the flow rate, or a lower efficiency filter and the higher flow rate, in order to the product flow and least resistance;
(5) economic considerations: excessive air velocity resulting in an increase in investment and operating costs, the appropriate air velocity above factors reasonably comprehensive, too often unnecessary, does not necessarily have an effect;
(6) low demand for cleanliness cleanroom, sometimes ventilation frequency depends on the indoor heat requirements.
These factors are difficult to quantify, can only be analyzed and compared and estimates. Therefore, in engineering applications, for cleanroom air velocity tends to refer to the relevant norms, OLED Display Module guidelines and other recommendations or reference value, and then the specific circumstances of the estimated impact of the above factors were determined after comprehensive consideration.
Air velocity for unidirectional flow clean room; non-unidirectional flow clean room ventilation frequency is preferred because it is difficult to measure accurately airflow velocity; also littered with late-stage filtration rate to reflect, and can be used for various types of air flow clean room, generally covered with 100% relative to the flow rate of 0.5m / s (100fpm), 25% relative to 0.125m / s (25fpm). Current relevant norms, guidelines and other recommendations or reference values ​​are shown in Table 1.
Note: 1, ISO14644-4 for the air velocity / ACH is clear as reference materials listed in the table only for microelectronics and IC factories; right column ISO5 only pharmaceutical grade air velocity> 0.2m / s, right ISO6 ~ 8 级 Jiewei lists reference values.
2, (M) refers to the mixed flow, N refers to the non-unidirectional flow; * refers to the isolation of pollution has taken effective measures to clean areas.

Component parts of FFU control unit

FFU control can be broadly divided multi-gear switching, continuous adjustment, computer control, such as several, but the functions are single control, zoning control, alarm, TFT Lcd Modules running status display.

But what causes FFU in such a long time has not been widely applied? There are three issues dominate.

First: the noise problem. You can think about at the time of the production process level, together with the noise of thousands of wind turbines would be?

Second: the pressure balance. To a large static pressure box, each with a different corner of the fan is able to get a balanced pressure, which at the time also can not be guaranteed.

Third: maintenance issues. FFU itself cost is relatively high, if it can not guarantee the life of the motor, then replace will bring additional investments. These are caused when companies do not choose to use FFU of the main reasons.
With the development of technology, these problems become easily.

One, first reduce the fan noise itself, character oled plus the unique duct design, improved efficiency of the fan, but also greatly reduces the noise

Second, the development of computers, advanced computer control system to solve the high-volume FFU pressure imbalance in the

Third, raise the level of the production process, extending the life of the fan; German EBM-quality centrifugal fan with long life, maintenance, small vibration and other features, the working life of 50,000 hours or more.

Antistatic agent in the world will have a wide range of applications

Antistatic agent market in North America is expected to 2004 years ago, the average annual growth rate of about 4%, to use point of view, most of the use of electronic appliances and on food packaging materials. The terms of the types from the antistatic agent, ethylamine class multi-use polyolefin, as electronic equipment packaging; while quaternary ammonium compounds are often used in PVC, such as industrial conveyor belts, disk packaging and bottles, etc.; fatty acid esters are more use of internal antistatic polyolefin use. European antistatic agent market will have an estimated annual growth rate of 2.5%, on purpose, mainly used in polystyrene, ABS and other styrenic polymer processing, due to add antistatic agent usually has a lubricating efficacy, it is sometimes difficult to distinguish with a lubricant. In Japan, an antistatic agent mainly of 0.1% to 0.2% of the concentration of mixed plastic being, as accurate as the mixing amount of the product on the type of polymer, wherein the polypropylene is the most frequently used products antistatic agent , followed by PVC and ABS. Antistatic agents throughout the Japanese usage rate is expected in 2003 nonionic / cationic antistatic agent used about 5,000 tons, the future will also be about 1% growth rate continues to grow.

The terms of the types of antistatic agents, polymer-type antistatic agent is the most promising permanent products, particularly the use in precision machinery is the growth of popular expectations. This is due to household appliances, electronic equipment used by the electronic circuit, when the electrostatic accumulation is excessive, Character LCD Modules poor contact may occur the situation, hence, have to prevent excessive accumulation of static electricity in this high-performance anti-
Static agent needs to be quite optimistic about the future. But so far the use of more surfactant adsorbed on the plastic surface moisture in the air to produce the effect of preventing static electricity, but because of vaporization, surface cleaning and other reasons, often making antistatic effect disappears or is contaminated, then the high dependence on humidity, in the case of drying effect is poor, so non-surfactant polymer products become better product.

Molding a polymeric antistatic agent is dispersed in the resin play a fixed effect, OLED Display and the low-molecular type (surfactant system), compared, and show a direct effect after molding, is not volatile, will not be affected by exposure contamination after cleaning effect is not reduced, etc., but the drawback is that only low-molecular type antistatic agent than the added quantity.

Currently polymeric permanent antistatic agent, compared with a surfactant system, it is still high-priced products, the manufacturers themselves without a permanent antistatic agent technology, inevitable costs will be relatively enhanced. At present, because of both the price, there are still considerable differences, there is currently a permanent antistatic agent penetration is still low, but the future along with the IT market needs and future expansion of the market, as well as other incentives under falling prices, have helped in the product market expansion.