LED Backlight Light Source Composition

It is mainly composed of light source, light guide plate, optical film, plastic frame, etc. The backlight has the characteristics of high brightness, long life and uniform light emission. At present, there are mainly three types of backlight sources: EL, CCFL and LED, which can be divided into edge type and direct type according to the distribution position of the light source. With the continuous development of LCD modules to be brighter, lighter and thinner, edge-lit CCFL backlights have become the mainstream of backlight development.

Electroluminescent (EL) backlights are thin and lightweight, and provide uniform light. Its power consumption is very low, and the required working voltage is 80-100Vac. The inverter that provides the working voltage can convert the input of 5/12/24Vdc into an AC output. However, the service life of EL backlight is limited (the average service life is 3000 to 5000 hours under the condition of 50% brightness, and the service life will be greatly shortened at higher brightness levels). Therefore, the ideal inverter for EL backlighting The device allows the output voltage and frequency to increase as the EL bulb ages, extending the useful life of displays employing EL's backlit light sources.