When people first encounter LCD liquid crystal screens, they often hear about LED backlights, but have never quite understood what it actually is. This article provides a simple introduction to what LED backlights mean, hoping it will be helpful to everyone.

Backlight is a light source located behind the liquid crystal display (LCD), whose illumination directly affects the visual effects of the liquid crystal module (LCM). The LCD itself does not emit light; it displays images or characters as a result of modulating light. It is widely used in industries such as small household appliances, touchscreens, cars, electric vehicles, mobile phones, tablets, GPS, and solar cells.

LED backlighting utilizes light-emitting diodes (LEDs) as the backlighting source. By using different semiconductor materials, LEDs with various light-emitting characteristics can be obtained. The LEDs currently in commercial use can produce colors such as red, green, blue, cyan, orange, amber, and white.

The advantages of using LED backlighting include a thinner profile at approximately 5 cm, a wide color gamut reaching 105% of NTSC, and a black light output that can be reduced to 0.05 lumens, leading to a contrast ratio of up to 10,000:1 on LCD TVs. Additionally, LED backlight sources also offer a lifespan of 100,000 hours.