White LED backlight driving circuit design and analysis oled module

In recent years, the industry began extensive use of LED replacement CCFL and EL as the LCD backlight (background lighting for short), compared to CCFL, EL. The LED has the following advantages:OLED Display
1) allows a more realistic color LCD with LED backlight can provide 130% of the NTSC color scale, only 70% of the CCFL. Levels expansion of the LCD image chroma saturation, more realistic;
2) allows the LCD thinner, the 18-inch LCD module, LED backlight thickness 4mm to 6mm, CCFL 8mm ~ 12nm;
3) long life, up to 50,000 hours;
4) comply with environmental requirements, LEDs do not contain mercury,
5) compared with the EL backlight, LED backlight is not generated in the scrambler. Thus, LED backlight is widely used in the field of PC, TV, car audio, cell phone, communication equipment, personal digital assistant (PDA) and watch, it has become the leading products of the LCD backlight market.
2002 LED market demand accounts for about 60% of the backlight market demand, at present, green, red, blue and white LED as a backlight of the LCD, due to price factors, the green LED in the mainstream, accounting for 80 of the LED backlight % of their rated current to 2mA to 20mA brightness 600mcd. Due to the higher cost of white LED, is mainly used for the color screen mobile phone and PDA backlight color as well as car dashboard lighting.serial display modules