LCD for non luminous display device, need with the help of a backlight can achieve the functions of display.Backlight performance is good or bad, except will directly affect the imaging quality of the LCD back light accounts for 3-5% of LCD module, the cost of electricity consumed more accounted for 75% of the module, is very important component in the LCD module.High precision, large size LCD, must have a high performance of backlight technology and cooperate, so when the LCD industry efforts to develop new applications at the same time, the high performance processing for backlight technology (e.g., high brightness, low cost, low consumption of electrochemical, lightweight, etc.) also play a role of behind.