The Principle of LED backlights display

The  Principle of LED backlights  displayRGB  LED backlights display can deliver an enormous color gamut to screens. When using three separate LEDs (additive color) the backlight can produce a color spectrum that closely matches the color filters in the LCD pixels themselves. In this way, the filter passband can be narrowed so that each color component lets only a very narrow band of spectrum through the LCD.
 This improves the efficiency of the LED backlights display since less light is blocked when white is displayed. Also, the actual red, green, and blue points can be moved farther out so that the   LED backlights display is capable of reproducing more vivid colors. CCFL backlighting has also improved in this respect. Many current LCD models, from cheap TN-displays to color proofing S-IPS or S-PVA panels, have wide gamut CCFLs representing more than 95% of the NTSC color specification.