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3 Des 2009

LED Televisions

By Ricky Strauss

Watching television is a favourite pass time to people all over the globe. In fact, using the TV to play games and watch movies has become such an important part of the lives of society, that manufactures continue to search for ways to enhance the television experience. In most cases, this includes a clearer picture, a bigger screen, or better sound. All of these aspects are wrapped up into the latest TVs inventions known as the LED high definition television.

From the trial of using LEDs for color and clarity in screen projection has evolved the LED television. LEDs are better than fluorescent or incandescent bulbs at directing light in a single direction. These television have much the same features as LCD TVs except that they make use of LEDs. The LEDs are either placed along the outer edges of the screen or across the back of it. Television with perimeter LEDs are edge-lit and televisions with LEDs in the back are back -lit.

The methods of LED technology that manufacturers use for creating LED televisions create two different perspectives for viewers. When the LEDs are placed along the side of the televisions, the screen depth size capabilities are reduced greatly. The screen can be thinner due to the lack of LEDs in the back. An edge lit TV also costs less than a back lit LED TV. However, when the LEDs are used across the back of the televisions, deeper and darker blacks are formed. The LEDs can actually be shut off so no light comes through. In the television world this is referred to as local dimming.

The cost of the clarity and color improvements with a LED HDTV comes with a cost. An upgrade to one of these televisions may cost the buyer up to $4000. Yet, with the upgrade the viewer gains much intensity in action films and gaming. LED TVs are more efficient at creating excellent pictures of fast motions. The LED HDTV manufacturers also claim that television cuts energy consumption by 40%.

Once the decision to upgrade has been made, there are several factors to consider before shopping for a new TV. A careful comparison should be made between LED TVs, LCD TVs, and Plasma TVs. The newest of the three, LED TVs, offer larger screen options. Their viewing angle is still short of the plasma but the reflective screen and burn out issue are not a problem.

When looking at terms associated with a LED screen, the word high definition will likely arise. All LED TVs has full high definition but not to the same degree. The LEDs in a LED screen combine to form little pixels or dots that contribute to the visual output. These red, blue, and green pixels work together to form all other colors including white. On some screens, a group of 9000 LEDs may be located within any one meter. In this case, the LEDs would be close together with a small pitch, space between them. A TV with a small pixel pitch has higher definition than screens with larger pixel pitch.

In addition to LEDs making their way into the world of television, they are now breaking ground with the LED monitor. The once popular flat screen LCD monitor has been outdone when it comes to color accuracy and precision. The LED monitors are created without metal that is found in other bulb type monitors. NEC is one of the first to put the LED monitor on the market with a cost reaching up to $6000 or more to purchase.

While there is no rush to run out and upgrade all electronic screens to LED screens, it does appear that this is where the future of viewing is headed. In given time the cost of the screens along with the size capabilities will decrease making LED TVs a common sight in homes everywhere.

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