About the LED-Backlight LCD Television

A LED-Backlight LCD TV (as known as LEDBLCDTV in factories) is actually an LCD TV that uses LED backlighting instead of CCFLs which was used in traditional LCD televisions. It is not a true LED display but is often called “LED TV” by some manufacturers. The use of LED backlighting has a dramatic impact, resulting in a thinner panel, less power consumption and heat dissipation, and a brighter display with better contrast levels.
An LED display is a video display which uses light-emitting diodes. A LED panel is a small display, or a component of a larger display. They are typically used outdoors in store signs and billboards, and in recent years have also become commonly used in destination signs on public transport vehicles or even as part of transparent glass area. LED panels are sometimes used as form of lighting, for the purpose of general illumination, task lighting, or even stage lighting rather than display.
The LEDs can come in three forms:
1. Dynamic RGB LEDs (which are positioned behind the panel): This method of backlighting allows dimming to occur in locally specific areas of darkness on the screen. This can show truer blacks, whites and PRs at much higher dynamic contrast ratios, at the cost of less detail in small bright objects on a dark background, such as star fields.
2. White Edge-LEDs (positioned around the rim of the screen using a special diffusion panel to spread the light evenly behind the screen most commonly): This method of backlighting allows for LED-backlit TVs to become extremely thin. The light is diffused across the screen by a special panel which produces a uniform color range across the screen.
3. A full-array of LEDs (which are arranged behind the screen but are incapable of dimming or brightening individually): Many brands use LED backlighting technology and may offer a range of benefits over CCFL LCD TVs such as reduced energy consumption, better contrast and brightness, greater colour range, more rapid response to changes in scene and a capacity to provide the means to render an image more accurately.
TV manufacturers can use an LED backlight instead of the Cold Cathode Fluorescent Lamps (LCD-CCFL) used in most LCD televisions. LCD-based televisions described as ‘LED TVs’ are different from self-illuminating Organic light-emitting diode (OLED), OEL or AMOLED display technologies. In the UK, the ASA (Advertising Standards Authority) has made it clear in prior correspondence that it does not object to the use of the term ‘LED TV’, but does require it to be clarified in any advertising. There are several methods of backlighting an LCD panel using LEDs including the use of either White or RGB (Red, Green and Blue) LED arrays positioned behind the panel; and Edge-LED lighting, which uses white LEDs arranged around the inside frame of the TV along with a light diffusion panel to spread the light evenly behind the LCD panel.
Differences between LED-backlit and CCFL-backlit LCD displays:
LED-backlit LCD TVs differ from conventional CCFL-backlit LCD TVs in the following: (a) Produce images with greater dynamic contrast; (b) With Edge-LED lighting they can be extremely slim. Models on the market can be approximately one inch thick; (c) Offer a wider color gamut, especially when RGB-LED backlighting is used; (d) Less environmental pollution on disposal; (e) Higher price; (f) Generally 20-30% lower power consumption.