LCD TV, 2009 highlights five trends forecast - LCD TV, plasma TV - household appliances
After several years of market cultivation, domestic consumers LCD TV Increasing the awareness levels, in July 2008 the ground begin broadcasting HD signals, in August Beijing
Olympics HD signals will be broadcast live all greatly boost to consumer enthusiasm, and the country to stimulate domestic demand, "
Home Appliances The countryside "policy in depth, in 2008 compared with the domestic LCD TV sales in 2007 increased significantly. From the 2008 LCD TV development, it shows many new highlights, LCD TV performance, increased research and development of various brands inputs, LED backlight, speed-driven, digital technology has been integrated machine launch the application; appearance aspects of thin, floating design makes the LCD TV is more humane; price more than the mainstream 40-inch large screen LCD TV prices continue to hit new low for the mass consumer; competition with plasma, LCD TV sales have been fully occupied market advantage. Now, we look to see the development of LCD TVs, 2009 5 big bright spot.
LED backlight system, LCD TV Listing 08 LCD TV industry's most technically innovative than highlight the use of LED backlighting system. LCD TVs use the traditional cold cathode fluorescent tube is the light source (ie CCFL), long life, but the technology is mature, there are many drawbacks: First, color gamut (the range of color expression) is small, usually only to NTSC (National Television Systems Committee) standard of 72% color gamut; second cold cathode fluorescent tubes contain a small amount of mercury, do not meet environmental standards; Third, Leaky is widespread, low-temperature start problems, slow response time.
CCFL cold cathode fluorescent tube backlight (left), RGB-LED backlight system (right) RGB-LED backlight, is the liquid crystal Panel Divided into multiple regions, each piece of the region activated by the four independent LED light emitting respectively red, blue, each one LED, Green 2 LED, the composition of RGGB-LED light-emitting unit. Based on the actual screen display needs to activate different regions of the LED modules, LED modules highlighted region more high brightness, LED modules Diablo region is the slightest light or do not activate, so that the whole screen can show a higher dynamic contrast . LED backlight system, the most significant advantage is that you can expand the color reproduction and high contrast. By selecting the appropriate wavelength LED and the matching color film, LED backlight color reproduction range can reach the standard NTSC color gamut of 105% or even 120% or more. But the LED backlight system drive circuit is a complex than CCFL Backlight backlit LCD TV backlight large, so a higher technical requirements.
RGB-LED driver according to the screen active area (left) and full activation (right) shows results Now published by the LED backlight system, the Big Three foreign brands Sony , Sharp, Samsung, and made the Hisense. The models involved are the flagship series: Sony X4500 series, Sharp XS1A series, Samsung A950 series and the Hisense T08 series, can be expected in 2009 will have more models and consumers. First listed is the Sony X4500 series, this series LCD TV is only 55 inches of a size, model is KDL-55X4500. Although the 55X4500's color gamut is only 96.09%, did not fully meet the standard NTSC color gamut, but far more than ordinary CCFL backlight color around 72% of the system performance capabilities. Quality performance from the evaluation, as well as with other brands WCG-CCFL Wide Color Gamut flagship screen contrast look, 55X4500 enrich the performance of delicate colors, the transition smooth, black sink capacity is very good. However, more than 50,000 yuan from the 55X4500 listing price of view, not many users can be accepted.
Sony KDL-55X4500
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