LED backlight module as a light source to replace the traditional cold cathode fluorescent lamps (CCFLs), not only has a thin power-saving, small size, long life, low voltage, start the fast benefits, along with the concept of environmental protection. For notebook computers, depending on the processor and the size, the power consumption of the LCD panel is about one-third of the whole machine, LED low power consumption, use of time in NB with LED backlight can be extended more than 1.5 hours; and with the LED light guide plate thickness from 2mm to 0.6mm (13.3 inches), the thickness of the screen can be thinned, the whole weight will be reduced; each CCFL contain about 2mg of mercury, the use of LED as a light source can to reduce mercury use. If you use the RGB three-color hybrid white, can provide better color saturation, color TV screen will be more vivid. LED can be the control of the regional dynamics, extinguished in some areas when the black screen in order to improve the contrast, but also energy saving. The LED fast response, using three-color RGB LED LCD with a quick response, use of color sequential (Color Sequituonal), omitting the use of color filters.
LED luminous efficiency is only 20 ~ 40lm / W, better than CCFL is 80lm / W, while the cost is too high is the biggest weakness of the LED backlight module. A CCFL with a high-brightness LEDs are priced at $ 1.5 from top to bottom, but the number of led high bay used is far more than the CCFL. In addition, the LED heat dissipation is poor, large-size TV fashion needs coupled with the cooling substrate will be an expense. Each one of the LED color decay at different rates, long-term use will be colored uneven.