LED Televisions | The Communication Blog

Sunday, November 15, 2009

LED Televisions

By Ricky Strauss

Television manufacturers continue to work to create a better and more pleasing viewing experience for consumers. The new craze in film watching and TV gaming opens up the TV electronic world to discover more realistic pictures through color perfection and clarity. Through this venture, many different types of bulbs and lighting sources have been tested and tried. While many have shown great success, the desire for even better continues. The newest discovery being Light Emitting Diode (LEDs) in 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.

As great as owning a LED HDTV sounds, it is not a purchase to make without a serious consideration of cost. An LED HDTV may cost the buyer $4000. However, serious TV gamers and film watchers will likely find that the capabilities of the LED HDTV to portray fast motion is well worth the money spent. Many claim that they never imagined the difference in picture until viewing the screen. Those concerned about the environment and energy consumption also believe that the 40% cut by the LED TV sets off the upfront cost.

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.

LEDs group together to form small dots or pixels in a LED screen. While all LED screens offer high resolution, the amount of resolution depends greatly on the pixels. Red, blue, and green pixels work together to form other colors as well as white. The distance between the pixels on a LED screen is known as pixel pitch. The smaller the pixel pitch of the screen, the closer the pixels resulting in a higher resolution. High quality LED screens may contain over 9000 pixels per meter. These LED screens are limited to 40 inches or larger.

The LED monitor has also broken ground in the electronics world. While many were happy with their flat panel LCD monitor, the color produced simply did not satisfy manufacturers. The LED monitor out produces the LCD model when it comes to creating accurate and precise color. However, this beautiful color does not come without cost. NEC has the first LED monitor with a high end price range of over $6000. In addition to displaying perfect color, the company also contributes part of its creation to the fact that Mercury is found in fluorescent backlights. Afraid of upcoming strict shipping restrictions, they claim to have made an environmental decisions as well as a color one.

All reviews and indicators point to LED technology as being the electronic of the future. While high cost and screen size limitations are a factor in the LED world now, manufacturers show promise of working through these issues. In given time, LED electronics could possibly be a normal in the homes of all television watchers.

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