LED LCD HDTV

Although LCD HDTV picture quality keeps improving, LCD still falls short of th best plasma TVs, especially when it comes to color reproduction and contrast. The fluorescent baklight used for LCD TVs is one limiting factor.

Standard fluorescent backlights can only reproduce about 72% of the brodcast TV color range, while"wide-range" fluroscents expdnd that to around 90%. The LED backlight system in the newest LCD HDTVs (Samsung is first to market with this new technology) actually reproduces 105% of tha range. Images look more real, with deeply saturated reds, blues, and greens, plus more natural skin tones.

Local dimming delivers deep black levels
On typical LCD TVs, the backlight fully illuminates the entire screen at all times, no matter what's happening in the video image. To re-create a dark area, the LCD screen's liquid crystals need to block the illumination coming from the backlight. But, it's difficult to block 100% of the light -- a big reason "LCD BLACK" usually looks more like dark gray. Local dimming technology take advantage of the brightness and speed of LEDs. The LED array is divided into a grid of many independently controllable sections, to accurately display bright and dark areas.