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 .