According to the technology types of LED backlight: currently, it can be divided into RGB-LED and white led. The former takes advantage of the ability of dynamic partition backlight technology and the excellent light source of three-color RGB LED, which has a qualitative leap in color and contrast compared with the traditional backlight. Therefore, it is usually applied to high-end TV products, which generally cost more than RMB 3W. The latter is a relatively common type of LED backlight, which is also widely used in laptops and LIQUID crystal displays. White LED backlight usually absorbs the light from the edge of the display, which is different from RGB LED and the direct backlight of traditional backlight.
According to the incident position of the back light source, LED backlight module can be divided into two categories according to the incident position of the light source: straight down type RGB-LED, straight down type white LED, side light type white LED, etc.
The difference between RGB-LED and white LED: RGB LED color gamlette performance slightly better, the disadvantage is high cost, the price of TV finished products is not acceptable to ordinary consumers; While the white LED light source, although slightly inferior to RGB LED in color gambit, but its relatively high contrast and technology cost is RGB-LED can not be compared.
Difference between straight down type and side in type: LED side light source is emitted from both sides of the body, and the light is projected onto the panel by the built-in light guide plate with high light transmittance. Maximum limit LCD thickness is compared with the side of the light source, direct under back light LED to dynamic backlight control, so do some dark scene in the image, only need to adjust the necessary backlight area (on the picture is black or dark part) of local lighting, which can show a contrast natural high quality graphics.

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