Friday, 26 June 2015



LED-backlit LCD TV is the use of light-emitting diodes (LED) as a liquid crystal display backlight TV. this does not mean that television use light-emitting diodes for image display With the light-emitting diode TVs increasingly competitive market, coupled with the light emitting diode applications matures, various TV manufacturers have actively into the light-emitting diode-backlit LCD TV, an attempt at a home television on the occasion of regime change can come out on top.

Types of light-emitting diode backlight technology;

LED back-light technology can be divided into direct type (direct back-lit or full LED array back-lit) and side-illuminated (edge LED back-lit) are two, and light-emitting diodes which are used in direct-divided into white light diode and red, green and blue light-emitting diode two kinds.

1-Direct type light-emitting diode backlight technology;

Direct type LED back-light technology is the more pieces of light-emitting diodes arranged in an array, placed behind the LCD diffuser and directly illuminated LCD. Thus, the direct type can comply with different parts of the screen brightness changes quickly fine-tune the brightness of the light-emitting diode, greatly improve the level of dynamic contrast ratio to the plasma display. The disadvantage is the need to use a large number of light-emitting diodes, and higher prices.
Had a direct type LED back-light use white LED, also used red, green and blue color LEDs (RGB LED) using RGB LED can have a wider spectrum of light, that have a wider color field.

2-Side-light emitting diode backlight technology;

Side-light emitting diode backlight technology is to white light emitting diodes on four sides of the LCD, LCD size with the LCD after a close reflective film, light emitting diodes LCD with photos from the gap between the reflective film inside, reflective film on a specially designed micro LED lighting pattern can come back after the LCD according to the light for 90 ° reflection. These reflective sheet was fine in the case without astigmatism sheet also enables the average light-emitting diode light distribution to shine LCD back.

Conventional side-illuminated light-emitting diode backlight brightness compliance can not quickly adjust brightness change different parts of the screen, but recent changes in vendor compliance screen success with the side illuminated LED technology limited quickly adjust brightness.