The LCD television is a flat-panel television which utilizes a Liquid Crystal Display technology. It has two layers of glass which are polarized and stuck together. The liquid crystals are held in one of the layers. These liquid crystals pass, or block the light, to produce images on the screen when the electric current passes through it. However, the crystals do not produce their own light. The light comes from the series of fluorescent lamps at the back of the screen. There are millions of shutters arranged in a grid, which open and close to release and trap some of the light that is not needed to create images. Then each shutter is paired with a colored filter which produces a sub-pixel. These are so small, that when they combine, they create a single pixel, which appears to be a single spot of color on the screen. With the help of the fluorescent lamps, the images created by the liquid crystals become visible to the viewer.LCD television produces high image quality. They can be made very thin, which makes them less space-consuming, and the user can hang them anywhere. This makes them appealing to buyers.
LED TV’s are actually very much like LCD TV’s. They also have a flat-screen which utilizes Liquid Crystal Display technology. The only difference is their source of light, which is at the back of the screen. The LCD TV uses fluorescent lamps, and the LED TV uses LED (Light Emitting Diodes). Manufacturers make a big deal out of LED back lighting because LCD sets using the technology are generally more energy efficient. There are other benefits as well, but to understand them we must take a closer look at the implementation of LED back lighting. There are two types of LED back lighting. One is referred to as Edge lighting, and the other is called Full-Array lighting.
• Edge-lit: LEDs are placed along the edges of the LCD panel
• Full array: Rows of LEDs are placed behind the entirety of the LCD panel
LED TV’s are LCD TV’s with a new back light system. They are newly developed for LCD’s because Light Emitting Diodes are said to give more balance in color saturation, and use less power than the fluorescent lamps. LED TV’s are the newest versions, and that’s why they are currently more expensive than the standard LCD TV’s.
Which is Better? Edge-lit or Full Array?
Each system has advantages and disadvantages, and the one that’s right for you depends on your needs and desires. Edge-lit sets are typically much thinner and lighter than those that use a full array because the lighting source takes up less space. Full-array sets are thicker and heavier, but they make up for that with local dimming, which means one section of the LED panel can be dimmed while other sections remain bright. That improves blacks and contrast in the resulting picture.
In short, sets that use full-array back lighting tend to produce the best picture of all LCD TVs. Those that use edge lighting sacrifice picture quality but are the lightest and thinnest TVs on the market.
Is LED Worth It?
Before you run out and buy an LCD TV with LED back lighting, you should consider one important factor – price. LED-backlit TVs are great, but they’re still more expensive than their fluorescent-lit peers. If picture quality is extremely important to you, I suggest spending a little more money to enjoy the benefits of full-array LED back lighting. If you’re willing to pay a premium to have the thinnest TV on the block, edge-lit is the way to go. If, on the other hand, you’re a bargain shopper, you will probably be able to satisfy yourself – and your wallet – with a well-made fluorescent-lit set.
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