According to the Taiwan Information Technology Information Center (MIC), the LED backlight application has gradually shifted from Japanese manufacturers to American South Korean and Taiwanese manufacturers in recent years, from small size to full size, from the Japanese market to the global market. However, due to high cost and poor cooling, and the module specifications have not been standardized, LED backlighting is still only appealing to light and thin NB products, and the penetration rate is only slightly higher than 10%. The larger Monitor and TV mounting rates are still low. It is expected that with the improvement of LED luminous efficiency, LED chip prices, and the establishment of module standardization, under the thrust of the brand business and the panel plant's thrust, NB LED backlight loading rate will continue to grow, to the 2011 global NB product LED The backlight loading rate may exceed 50%, making it a mainstream backlight source.
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The savvy news, MIC pointed out that the biggest difference between LED backlight and CCFL backlight is that the LED backlight has no mercury, power saving, the package thickness is only about 0.4-0.6mm, and the power consumption is low (the current 40-inch TV power consumption is about 160W), high color saturation, etc., but due to LED backlight has the disadvantage of poor heat dissipation, and the current cost is still high, to calculate the cost of 40-inch TV module needs 360 US dollars, plus LED backlight technology is still in the development stage, module It has not been standardized (for example, with different Convertor Boards, different pin numbers, etc.), but at the same time, it faces the competition of CCFL mercury-free, next-generation display technologies such as OLED and SED, and W-OLEDs and CNTs. The main applications of backlights are still large and medium-sized products. As for the applications of Monitor and TV, the proportion is still low.
Among them, NB products have always been thin and light. Since the Japanese manufacturers FUJITSU and Sony took the lead in adopting LED backlighting in 2005, other NB manufacturers also followed suit, including Toshiba, ASUS, APPLE, DELL, HP, Acer, LG, and 2008. Lenovo and other NB manufacturers have launched LED backlight NB products, statistics to May 2008, NB LED backlight mounting rate has been 10%. It is expected that as the LED luminous efficiency continues to increase, the price of LED chips continues to decline, and with the development of standard module specifications, the LED backlight loading rate of NB products may exceed 50% by 2011, and 50%-60% in 2012. Become the mainstream backlight of NB.
As for Monitor, although Samsung, CMO, Acer, and other manufacturers currently offer LED backlight products, the current pick-up rate is only 0.3%. It is expected that the LED backlight loading rate will still only be 7% in 2011 and will exceed 10% in 2012. LCD TV's LED backlight loading rate is due to cost factors, the current loading rate is lower, only 0.09%, the current application vendors only Samsung, Sony, but LG and SHARP also plans to launch 47-inch and 52-inch panel within this year .
MIC estimates that the LED backlighting rate for LCD TV products may still only reach 4.5% by 2011, and may reach 10% by 2012. However, it is expected that CCFL mercury-free and next-generation display technologies and backlight sources will continue to influence. LCD TV products LED backlight application ratio.
According to MIC research data, LED wafers have experienced the development of red light, yellow-green light, blue light, green light, and white light. Since 1998, they have been used in the backlight of small-size color LCD panels, and have gradually developed in the development of backlight applications for medium-size and large-inch color LCD panels. . At present, the main application types are W-LED and RGB-LED. Among them, W-LED is turned into white light in the package, the color saturation is low (NTSC 42%-98%), the light is small, and the luminous efficiency is high (60 lm/ W), low power consumption, simple circuit design, small number of use, suitable for low consumption, IT applications with low color image quality requirements.
RGB-LEDs are three LEDs that are turned into white light outside the package, with high color saturation (NTSC 105%-150%), large calendering space, low luminous efficiency (10-60lm/W), high power consumption, and circuit design It is more complex and uses more stars. It is suitable for audiovisual application products with high colorization. The type of LED backlight is divided into side light type and direct type. The side light is placed on the bottom or the upper and lower sides of the panel. There are more liquid crystal panels with smaller area, and the lower type is placed under the panel, with a larger area. There are more liquid crystal panels.