Taiwan manufacturers are very optimistic about the prospects of LED backlight technology

In Taiwan, Yokohama at the CMO panel manufacturers in Japan (CMO) and (AUO) are AUO prospects for LED backlight technology said full optimism. Using LED as the backlight module can provide better brightness and color, which shows the brilliant color degree than fluorescent backlight current (CCFL) higher than 25%; most of the planar LCD TV display, use cold cathode fluorescent lamp (CCFL) as back light. CCFL is effective, but its brightness will fade over time, the color will change, the service life is between 15000 to 25000 hours. In addition, CCFL light source covers only 75% of the color space defined by NTSC.

LED backlight technology using 47 inches LCD TV

However, LED also has some more serious congenital defects, the most troubled by the industry should be the issue of luminous efficiency of LED. As the backlight of the LED device to the majority of white light type, while the white light LED devices at the beginning of luminous efficiency is not high, resulting in a low screen brightness. At present, the luminous efficiency of CCFL cold cathode fluorescent lamp can reach 50-100lm/W (LM / W), and white LED devices in the beginning the luminous efficiency is only 20lm/w or less, which is LED in the beginning is not suitable for LCD backlight display. Fortunately, the progress in this field is very rapid, white LED luminous efficiency to increase the annual increase of 60%, so far, the luminous efficiency of white LED devices through 50lm/w, to reach the practical level. The industry hopes to be able to before 2007, the luminous efficiency of white LED will be raised to a high level of 75lm/w, when using the LED device as a backlight LCD monitor will not have any technical barriers.

Another major drawback of LED devices is that the cost is high, the current price of the LED backlight module components is about 5 times of CCFL, the larger the screen size, the higher the cost of using LED backlight technology. With the increase in production capacity, the cost of LED backlight will decline rapidly, is expected in 2006 the price of LED backlight can be reduced to about 2 times the CCFL backlight, just a step away from the popularity of large-scale.