LED TV


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LED TV

A flat panel LCD TV set that uses LEDs (light emitting diodes) for its backlight source rather than the traditional cold cathode fluorescent lamps (see CCFL). Smaller, more power efficient and having a greater optical range than the fluorescents, LEDs produce deeper blacks and more saturated color. In 2005, Sony was the first to sell an LED TV.

Although the TV is really an LCD TV, and the LEDs are secondary components, the industry branded them as LED TVs to avoid monikers such as "LED backlit TV" or "LED-based LCD TV." Today, most TV sets are LED TVs.

White or RGB
White LEDs are less costly, while red, green and blue (RGB) LEDs provide a richer color gamut.

Backlights: Direct Lit, Edge Lit and Full Array
There are three "local dimming" backlight techniques for LED TVs, all of which dynamically dim the light behind the black areas of the image to make them darker.

The more economical direct-lit method uses LEDs in a sparse array across the back. Because the LEDs are farther away from the screen to allow each light to spread to more pixels, direct-lit TVs are as thick as the older CCFL fluorescent lamp LCD TVs.

Edge-lit LED TVs beam light to the back of the screen from the sides and allow for ultra-thin cases. Although some designs provide selective dimming, they are not as effective as the full array. In addition, they have a tendency to be brighter at the edges than at the center.

The full array covers the entire back of the screen with LEDs. Although the case is thicker than edge-lit designs, the full array provides better details in shadows and more contrast than the other methods. See ULED, LED, LCD, flat panel TV and Dolby HDR.


A 55" Samsung LED TV
Using edge-lit LEDs rather than fluorescent tubes, this Samsung TV is only 1.2" deep. Introduced in 2008, it was amazingly thin compared to previous LCD TVs. (Image courtesy of Samsung, www.samsung.com)







More Than Six Feet Wide
In 2012, Sharp introduced a 90" smart LED TV, the world's largest. The 3D set includes apps for Netflix, Hulu Plus and other services and has Wi-Fi built in. In 2013, Samsung bested this dimension with a 95" model.
References in periodicals archive ?
Sharp is also showcasing the highly acclaimed, award-winning ELITE LED TV series.
In addition to the shootouts, editors put together lists of the top LED TVs and Plasma TVs for the 2013 year.
Regarding the company's lunch of 3D and LED TV models, Kim said, the major goal is to become the pioneer of such advanced products rather than only pursuing higher market share.
Reuters has reported that the overall LED TV market is expected to be about 4.
All of these driver ICs match perfectly with the new AS1390 combination boost controller / buck converter, which is optimized for the power needs of LED TV backlights.
If the LED technology can improve further and LED prices can really go down, the LED TV market will grow very fast.
A graph comparing LED TV backlighting options (direct, segment edge and edge dimming) is available: http://www.
Industry analysts pointed out that Samsung's orders for LED TV panels should be in the 40-inch range initially and then 46-inch products might be added.
Integrated Wireless Internet allows for seamless connectivity to your wireless home network, to stream your favorite movies and music from the internet to your Unisen Immersive Sound LED TV.
Tenders are invited for Supply of laptop / computer peripherals / LED TV / refrigerator / Digital camera / water purifier / chair / table /audio system utensils for the year 201S-16 with following specifications for furnishing Administrative building cum training centre of Centre of Excellence, Deras: Table 14 chair, helvolving chair, desk 3 seater chair, instructor table, chair, book shelf, table, chair table chair.