Today's flat panel TV market turns out to be squandering charming eyes . Not only in terms of price , quality , performance is fairly mature traditional LCD TVs are very active, and accelerate the adoption of LED LCD TVs and 3D TVs also debut should not be underestimated . So for consumers, how do we buy into a versatile products?
LCD TV panels accounted for more than 70% of the cost , is the core component of LCD TVs. Notably , the panel on the market are "hard screen" and "soft screen " points. Soft -screen liquid crystal molecules recovery is slow , the screen is unstable. In contrast, hard screen has a clear advantage : When the touch , no " Watermark " phenomenon. Even when subjected to external forces beating and shaking , it will not interfere with a hard screen showing a smooth, clear picture. For this reason , IPS hard screen technology also has ultra-stable hard screen , and " touch the selected hard screen " LCD TV selection method has also been widely used.
LED TVs are hot at that time , it has a stylish ultra-thin , fine quality , green energy-saving features, is the perfect choice for many consumers eyes. However , note that , LED LCD TV market is divided into direct type and edge-lit . The difference is that side- advantage in the slim design and cost , but also the most widely used applications ; rather direct style is more concerned about the quality of user choice. Also , buy a high- quality LED LCD TV screen to distinguish between hard and soft .Graphic LCD
Display As the molecular conversion speed hard-screen LCD screen 10 times faster than the soft , so when displaying fast motion picture , better able to ensure a clear , smooth and realistic effects .
For in the initial stage of 3D TV , the general view is that the industry , 3D TV on the LCD screen of the requirements will be more stringent than 2D TV. Because the 3D TV technology is relying on the principle of super-fast screen refresh rate and shutter glasses fit , so that the two vice complete picture formed at different times of persistence visual overlay. For this reason , many manufacturers have chosen the response speed of the liquid crystal molecules advantage of IPS hard screen panel. With Trumotion480Hz technology , 3D realization of a second screen is refreshed 480 times , and through the " flashing light " technology compatible , to minimize the result of his eyes " about interference " occurred " ghosting and dizziness ," and so on. Therefore, in the 3D TV can withstand a higher price , the one based on 3D TVs IPS hard screen technology will become the first choice .
Bluntly "LCD TV screen is the pick ! ", Although somewhat definitely speaks these words , but considering the merits of the Serial Lcd
Display Module and image quality for LCD TVs have a decisive impact on the election -screen LCD TV really is purchase of a key ring .
color lcd display module
color lcd display module
2014年1月2日星期四
CCFL LCD backlight Analysis of strengths and weaknesses
Most LCD monitors on the market are based on CCFL (cold cathode fluorescent lamp ) backlight. CCFL backlight design are mainly two: " side-in " and " straight sets " type , but because of the side- by optical light guide design allows high attrition rates , thereby allowing the backlight brightness of the subject , the brightness of the larger panel size lower , in general, when the liquid crystal panel size over 15 inches , the backlight brightness will be significantly reduced. So we use at home are usually large-size LCD Teluk style .
Teluk type CCFL backlight module does not require a light guide plate , breakage problems are more dull , so I do not need the brightness enhancement film , especially a minority brightness enhancement film industry's patented technology , expensive, Telok style guide can be omitted brightness enhancement film and the optical plate , the cost can be significantly reduced.
But here and there is a problem , the use of Teluk type CCFL backlight LCD, panel size larger the proportion of the cost of its share of the higher backlight module , there was statistical point out that the same is to use straight sets type CCFL backlight module , when 15 inches backlight module cost only 23 % of the total , but it increased to 30 inches by 37% , and the estimate to 57 inches , backlight module cost share will reach 50% . So, Teluk type CCFL backlight only suitable for use in 30 inches or so medium-sized LCD, is not suitable for use in the design of a larger area .OLED Display Meanwhile , CCFL is the use of mercury to produce the gas discharge lighting, although the RoHS EU entered into , as long as "Mercury " dose below standard still acceptable , but no one can guarantee the future is likely to raise the standard to zero content ( do not allow use ) , then CCFL will not be used, or be diverted to non-mercury type CCFL.
Even non-mercury type CCFL technically feasible, but is still confined CCFL light tube of gas-discharge electron illumination , light tubes resistant to external force is limited by the resistance , the larger the collision will cause light pipe rupture, so the lighting failure. And in order to enhance the brightness of the screen , you must increase the number of fluorescent tubes , and then the optical density of the light pipe arrangement is too large will have a huge amount of heat , which will heat the liquid crystal forming a great challenge. Therefore, in order to ensure the heat, the only viable solution is to increase the volume of the liquid crystal.
Incidentally that the use of large -inch CCFL lcd module TV on the number of fluorescent tubes , light pipe length must also be increased due to the number of inches and growth, but longer CCFL light tube with both ends of the middle of the light pipe will prone to brightness and color MURA MURA problems , thereby affecting all of the backlight light , in order to continue to maintain the light are , you must spend to enhance light diffusion film have degrees, but the proliferation of film will bring light transmittance of breakage , reducing the brightness , the results had to reduce the brightness to increase the number of the light pipe to the reinforcing way , but the previously described : the light pipe will increase the heat difficult to design , to increase the thickness of the backlight module , the power consumption increases even under statistics, electricity CCFL backlight LCD TV accounted for 90% of overall electricity consumption high . So, change the backlight technology is one of a change in the direction of the current LCD picture quality .
Teluk type CCFL backlight module does not require a light guide plate , breakage problems are more dull , so I do not need the brightness enhancement film , especially a minority brightness enhancement film industry's patented technology , expensive, Telok style guide can be omitted brightness enhancement film and the optical plate , the cost can be significantly reduced.
But here and there is a problem , the use of Teluk type CCFL backlight LCD, panel size larger the proportion of the cost of its share of the higher backlight module , there was statistical point out that the same is to use straight sets type CCFL backlight module , when 15 inches backlight module cost only 23 % of the total , but it increased to 30 inches by 37% , and the estimate to 57 inches , backlight module cost share will reach 50% . So, Teluk type CCFL backlight only suitable for use in 30 inches or so medium-sized LCD, is not suitable for use in the design of a larger area .OLED Display Meanwhile , CCFL is the use of mercury to produce the gas discharge lighting, although the RoHS EU entered into , as long as "Mercury " dose below standard still acceptable , but no one can guarantee the future is likely to raise the standard to zero content ( do not allow use ) , then CCFL will not be used, or be diverted to non-mercury type CCFL.
Even non-mercury type CCFL technically feasible, but is still confined CCFL light tube of gas-discharge electron illumination , light tubes resistant to external force is limited by the resistance , the larger the collision will cause light pipe rupture, so the lighting failure. And in order to enhance the brightness of the screen , you must increase the number of fluorescent tubes , and then the optical density of the light pipe arrangement is too large will have a huge amount of heat , which will heat the liquid crystal forming a great challenge. Therefore, in order to ensure the heat, the only viable solution is to increase the volume of the liquid crystal.
Incidentally that the use of large -inch CCFL lcd module TV on the number of fluorescent tubes , light pipe length must also be increased due to the number of inches and growth, but longer CCFL light tube with both ends of the middle of the light pipe will prone to brightness and color MURA MURA problems , thereby affecting all of the backlight light , in order to continue to maintain the light are , you must spend to enhance light diffusion film have degrees, but the proliferation of film will bring light transmittance of breakage , reducing the brightness , the results had to reduce the brightness to increase the number of the light pipe to the reinforcing way , but the previously described : the light pipe will increase the heat difficult to design , to increase the thickness of the backlight module , the power consumption increases even under statistics, electricity CCFL backlight LCD TV accounted for 90% of overall electricity consumption high . So, change the backlight technology is one of a change in the direction of the current LCD picture quality .
2013年11月3日星期日
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.
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.
2013年11月2日星期六
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 .
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 .
2013年8月19日星期一
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.
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.
2013年5月10日星期五
TFT-LCD to see 4K New Hope
Is currently the 4K panel on the market with full HD FHD panel price difference is about 50%, with the 4K panel yield improvement and cost, it is expected that when the 4K panel with FHD panel price difference is less than 30% of the whole plant will produce more The big attraction. 4k technology is 4096 x 2160 pixel resolution, which is four times the resolution of HDTV, belongs to the ultra-high-definition resolution. In fact, the production of other technical panel can also reach the 4k level. TFT-LCD panels "4K" very mature, OLED is still in the early industrialization, many of the technical aspects of the advantage does not reflect the product application. At the same time, the short term is difficult to reduce the price is relatively high.
In the consumer market, consumers gradually recognized the large-size TV, increase the demand for large-size panels, global TFT-LCD LCD panel demand growth rebounded to 14% in 2012. Slow down year by year after the global TFT-LCD panel production capacity growth in 2006 reached 55% in 2011 to 15% in 2012, only 7% is forecast in 2013, in 2014 the global TFT LCD Module panel production capacity increase will be further reduced to 4%. The market forecast will become the trend of the large size of the LCD panel demand will continue to maintain double-digit growth in the next two years. Global LCD panel production capacity slowdown as well as to enhance the market demand, the industry supply and demand changes in the relationship.
In the third quarter of 2012, just warming global panel market, Huaxing power three months in advance to achieve design capacity, the fourth quarter net profit of 3.9 billion, the first year of the 8.5 generation line operation profit. 4k for the entire TV industry chain has injected new vitality. Among them, the LCD panel production enterprises will be the first to benefit. After nearly two years of recession, the global LCD panel industry in the second half of 2012 ushered in returning to the pick up.Character LCD Display
Functional concept of the "3D", "Smart TV", consumers are starting to become more pragmatic, quality become an important factor affecting the purchase. TV industry in recent years into a size and price competition, and the 4K bring TV hardware technology upgrades. 4k product prices more popular domestic brand 50 inch 4k TV priced at about 10,000 yuan, has little difference with the high-end HDTV. Although the source of the film is less, but for the television industry, the hardware first is the norm. 4K other products such as cameras, projectors launched website launched the 4K movie download, 4K TV development is widely optimistic.
4k ultra high definition "in 2013 has become the most popular one of the IT vocabulary, TFT-LCD display industry hope to see a new development.
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