OLED: Organic Light Emitting Display, the Organic Light Emitting Display, on the mobile phone LCD belong to new species, known as 'dream' monitor. OLED display technology and the traditional LCD display in a different way, no need backlight, with very thin organic materials coating and glass substrates, when a current through the organic material will glow. And OLED display screen can do much lighter, more visual Angle, and can significantly save electricity. But while technology better in the future OLED will replace such as TFT LCD, but organic light-emitting display technology there are defects such as short service life, large screen difficult. The abbreviation of LED's Light Emitting Diode Light Emitting Diode. Leds can be divided into two categories: one is the LED single pipe application, including the back light LED, infrared LED, etc. ; The other is LED display, at present, China and international in the LED base material manufacturing there is a certain gap, but in terms of LED display, and the level of design and production technology in China with the international synchronization. LED display is a display device composed of light emitting diode array. It adopts low voltage scanning drive, has: less consumption, long service life, low cost, high brightness, low malfunction, large Angle of view, the visual distance, etc.