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LCD is the abbreviation for liquid crystal display. But LCD can’t emit light by its own, LED backlight panel is the light source of LCD. “LCD backlight” means that LED backlight for LCD. “LCD backlight” and “LED backlight” are actually the same thing.
Round RGB LED Backlight panel with Dart Target Shape
Green LED Backlight Module With Direction Arrow Shape
Blue LED Backlight Unit With Square Shape and Middle Square Hole
Blue LED Backlight Panel With Square Shape and Middle Round Hole
Ring Shape Blue LED Backlight Module
Square Shape RGB LED Backlight Unit
Ladder-shaped Small RGB LED Backlight Panel
Oblong Shape White LED Backlight Module
Blue LED backlight Unit With Ladder-shaped Light Guide Plate
Oblong Yellow LED Backlight Panel for Learning Machine
Red LED Backlight Module for Baby Toy
Green LED Backlight Unit for Indicator Lamp
Oblong Green LED Backlight Panel
White LED Backlight Module for Remote Control
White LED Backlight Unit for Medical Equipment
Hexagonal Blue LED Backlight Panel for Communication Module
A brief introduction for backlights
Because the LCD panel gives no lights of its own, there must be an outside light source attached to it. The Backlight which is an optical component provides lights for LCD display products. In simple terms, it is a very important component for LCD display. Therefore, it is a non-standard product which is attached to LCD display.
Backlight products could be divided into 2 categories according to the position of the light source.
1) Bottom backlight:the light source is at the bottom of light guide plate.
Composition: plastic shell, PCB board, tube core glue, reflection film and diffusion film,
Feature: It is relatively thicker and there are limitations on the design of the backlight module.
2) Edge backlight: the light source is at the edge of light guide plate. And it could be divided into black and white screen edge backlight, colorful screen edge backlight and CCFL edge backlight according to its assembly and applications.
2.1 Black and white screen edge backlight: LED lamps which are wielded to the PCB board emits lights through light guide plate.
Composition:light guide plate, PCB board, LED lamp, diffusion film and reflection film
Feature: the black and white screen edge backlight which compares to the bottom backlight can save a lot of LED lamps, space and energy. The thickness could range from 0.7mm-2.0mm according to the need of design. Nowadays, it is widely used in MP3&4, mobile phones and so on.
2.2 Colorful screen edge backlight: LED lamps which are wielded to the PCB board emits lights through light guide plate and prism brightness enhancement film.
Composition: light guide plate, PCB board, LED lamp, diffusion film,reflection film and prim brightness enhancement film.
Feature: it is very thin, bright and low power consumption. It is widely used in mobile phone, PDA and other modules.
2.3 CCFL backlight edge backlight: it uses CCFL as light source.
Composition: light guide plate, PCB board, CCFL, diffusion film, reflection film and prim brightness enhancement film.
Feature: it is brighter than LED backlight, but it takes a longer start up times (about 3 minutes). Furthermore, it is not environment friendly. So it is no longer in used in a lot of countries, especially EU countries.