led edge lit lcd panel quotation

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led edge lit lcd panel quotation

There are two types of LED TV - edge-lit and back-lit televisions. So what is the difference, and is it important? Find out everything you need to know.

This type of lamp has managed to produce high-quality televisions. But, there have always been disadvantages to this technology, such as poor contrast ratios and color reproduction.

Different parts of the screen can have the blocks of lights switched on or off at any time, which gives the TV a much better contrast ratio than a traditional LCD TV.

Therefore, a back-lit LED TV with local dimming produces a better picture, which helps it to create an image comparable with other TV technologies like OLED.

A downside is that the power consumption of these TVs can be greater than standard LCD or edge-lit televisions – especially those models which use RGB LEDs.

The advantage over an edge-lit TV is that the lighting will usually be more uniform across the screen – eliminating the light-pooling of edge-lit screens.

The lights in edge-lit LED televisions are placed around the perimeter of the LCD screen – and the light they emit spreads across the back of the panel using a series of ‘light guides.’

led edge lit lcd panel quotation

Samsung announced its new lineup of "LED TVs" at CES in January, and gave CNET editors a walk-through today to preview the technology. The company also set prices, and as expected, it"ll cost you a fortune to take one of these thin models home.

The name "LED TV" sounds simple enough, but it"s important to remember that these inch-thin sets are actually otherwise normal LCD (liquid-crystal display) TVs that use LEDs (light-emitting diodes) instead of the standard fluorescent backlights. But it gets even more confusing. We"ve reviewed LED-based LCD displays before, most recently the Sony KDL-55XBR8 and Samsung LN46A950--the two best-performing LCD TVs we"ve ever tested. A lot of the credit for those TVs" excellent picture quality can be attributed to their local dimming technology; groups of LEDs behind the screen can be dimmed or turned off to achieve those deep, inky blacks we all love so much.

The 2009 Samsung LED TVs we"re previewing here do not utilize local dimming, so we don"t expect them to match the picture quality of the local dimming sets. Of course, we"ll know more once we can review one. In the meantime, we"ll refer to the new displays as "edge-lit LED-based LCDs." More complex, we know, but also quite a bit more accurate.

The slideshow above goes into the nitty-gritty behind, or along the edge of, the technology. The short story is that the LEDs themselves are arranged along all four edges of the screen, and a special "light guide" sends light toward the middle. The result, according to the company, is similar uniformity characteristics to standard backlit LCD displays.

The downside is that they"re extremely expensive. The cheapest model, the 32-inch UN32A6000 ($1,599), will cost more than twice as much as the company"s standard 1080p 32-incher, model LN32B530 ($749) does. The 46-inch UN46B6000 ($2,799) pictured at the top commands a $700 premium over the equivalent standard 120Hz set, model LN46B650 ($2099). The step-up LED-based LCDs cost more for extra features like