LED Backlight

LED (light emitting diode) backlights are the most popular type of backlight for small and medium LCDs. A new trend has begun where even large displays such as, laptops, desktop monitors, and LCD TVs have LED backlights. The advantages of LEDs are its low cost, long life, no EMI interference, low operational voltage, and ease of brightness control. One disadvantage in larger displays is that too many LEDs increase the power consumption and will generate heat as a result. However, this problem will soon be overcome. LED backlights come in several different colors: yellow-green, orange, amber, pure green, blue, and white. There are two basic LED backlight designs: Bottom (array) and edge lit. The bottom (array) lit configuration has several LEDs mounted uniformly behind the display, which provides uniformity and brighter lighting, but also consumes more power and requires thicker LED backlights. The Edge lit configuration consists of LEDs mounted to one side or corner, which offers a thinner package and consumes less power. The edge lit design occupies 98% of the LED backlight market for small to medium LCD modules.

Array LED backlight

Side lit LED backlight