LED Backlighting

Refers to use LED backlighting emitting diode (LED) to as LCD screen back light. And the traditional CCFL (cold cathode tube) back light, LED compared with low power consumption, low calorific value, high brightness, life is long, etc, are expected to replace conventional backlighting system in recent years thoroughly.

overview

In recent years, back light development soon, there have been new technology, new product launch, LED backlighting gradually entered the industrialization, have certain scale, CCFL, compared with obvious energy saving LED, LED backlighting remains need improvements, domestic upstream kit factory follow international situation, the technical exchanges and interaction of improvement and popularizing sample products etc is LED into the large size LCD backlighting, as the biggest obstacle to field one of important fittings in LCD products, the back light of recent development soon, there have been new technology, new product launch. Which LED (light emitting diode) backlighting market share in increase gradually. On a laptop, monitors and televisions and other products, the original has been using cold cathode fluorescent lamps (CCFL) back light, from the start of 2008, notebooks and monitor the use of product in expanding LED backlighting. Relevant statistics shows that in the first quarter of 2009, LED backlighting shipments for the same period in 2008 is eight times. Meanwhile the skillfulness in CCFL LCD TV field, with the 2008 launched the first paragraph, the domestic market LED backlighting on television LED backlighting TV product also springing up appeared in the market.

Backlighting definition

In the electronic industry, backlighting is a kind of lighting form, are often used in LCD display. Backlighting type and the former light type differs from the side or backlight behind and before irradiation, light just as its name implies is from the front illuminate. They are used to increase the lighting in low light environment degree, and computer monitors, LCD screen brightness, in order to show a similar way with CRT produce light.

Its illuminant may be the incandescent light bulb, electro-optic panel (ELP took), light emitting diode (LED), cold cathode tube (CCFL), etc. The entire surface lightning panel provide uniform light, but other backlight model USES the light source is never even astigmatism to provide uniform light.

The backlight can be any a kind of color, monochromatic LCD usually have yellow, green, blue, white backlit. But color display USES white white light, because of its cover most color.

By use LED backlighting in small, cheap LCD panel. His light is usually color, although white backlighting are becoming more common. Lightning panel is frequently used in large display, then uniform backlighting is very important. The lightning panel need to go through high voltage ac drive, this section by the use of flow changing device loop to provide. Cold cathode tube used in like a computer display, color is often white, this also need to reverse flow changing device and astigmatism with editor. Incandescent backlighting is in need of high brightness was used, but its shortcoming is the life of incandescent bulb quitelimited, and can produce quite a lot of heat.

LED backlit LCD can improve the colour performance. LED by three discrete LED light that generate it, provide quite identical LCD like some filter color device own color spectrum.