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LCD TV LED will replace CCFL1 future trends
Since 2008, LED backlight gradually into industrialization, expanding market share. Used in notebook computers from the beginning, and now used in monitors, LCD TV, LED backlight products are constantly emerging, growing market share.
Is compared to CCFL , LED have many advantages, especially in environmental protection is important, therefore, along with cost reduction, market expansion, LED industries a great impact on CCFL backlight, CCFL has may eventually replace the LED out of the market.
3M (China) Optical Business Development Manager for the big screen blocking Guanglei accepting "of China Electronics News" interview, said, LED technology will become mature and popularity of new liquid crystal industry growth drivers. From a consumer point of view will create a new selling point and liquid crystal display applications, thereby stimulating consumer demand; from the producer level, with the LED will be conducted to promote technological upgrading and industrial transformation, and thus continue to attract talent and investment.
LED and cold cathode fluorescent lamp compared to advantages are manifold. The first is energy saving, cold cathode fluorescent lamp of the optical efficiency of 60lm / W, while the current business of the LED efficiency has reached twice this value, the samples in the laboratory can also re-doubled. Secondly, LED backlight mechanical structure will bring great changes in the design. Because the small size and the LED directional light, and can greatly reduce the traditional backlight in the thickness of light guide plate, even without light guide.
In addition, the cold cathode fluorescent lamp, mercury is the high cost and very harmful to the environment of a substance. From an environmental point of view, LED gradually replace cold cathode fluorescent lamp will be an inevitable result.
LED backlight applications could have caused disruptive changes. "3M as early as five years ago began using the company's core technology platform, development of LED can give full play to the characteristics of the optical and mechanical systems. LED to LCD has only just begun to bring changes in the subsequent development we will wait and see." Blocking light Lei said.
LED backlight is still inadequate
While the LED backlight obvious advantages, but still needs improvement. LED manufacturing and packaging technologies, especially large-size CCFL backlight is relatively immature, and in the LED manufacturer of LED used for backlight is not very specific technical requirements. From the packaging side, is more suitable for LED lighting package, and not used to mixing of light from the backlight on demand. "Commercialization of LED is still not high luminous efficiency, color gamut and light effects of conflict, we must achieve a breakthrough, while the price of LED also higher.
CCFL backlight has a leading position in the backlight. The display size from other products such as notebooks, monitors, to large size products such as LCD TV, CCFL backlight backlight products has been the largest share of. Currently, large-size backlight side, CCFL backlight because of its low cost and sophisticated technology, account for most of the market. At the same time, major manufacturers have added a new CCFL backlight technology, to the added energy, such as scanning backlight, dynamic backlighting. Adding new technologies to improve the quality of the liquid crystal display, reducing power consumption.
Optical Co., Ltd. Anhui steady Run-Sheng Chen, general manager also believed that a large size backlight current mainstream technologies and products remains CCFL.LED widely applied in optical efficiency, cost, heat and so on are all there to promote barrier.
Although the prospects for the development of LED backlighting, LED light source technology, but at this stage from perfect. Including cost, efficiency, and brightness uniformity control problems still need technical improvements. LED light source for the nature, different from the line source of CCFL. Used in backlight LED, need to light all of the handling of extraordinary stress
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