LCD Television

Liquid Crystal Display technology or LCD technology for short has been around for many years through displays used in several common daily use devices. Whether it is displaying numbers in calculators, or time in digital clocks and watches, or letters and images in laptops, or setting the time and power in microwaves, or the favorite music number in a CD player all depend on LCD technology even though one may not be aware of its presence. Another gadget using LCD technology that is becoming hugely popular is the LCD television.

LCD televisions use LCD panels for displaying the images � thin and flat devices consisting of a no. of pixels or picture elements that illuminate depending on the signal passed through them. These pixels are made up of thin film transistors (TFT). The TFT is a kind of field effect transistor containing layers of metallic, dielectric and semiconductor material...

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Satellite Television

Geo stationary satellites are satellites that are positioned about 36,500 kilometers or 22,300 above the Earth's equator, in a region called the Clarke's belt and rotate at the same speed as the Earth and hence appear stationary to an observer on the Earth. Satellite television receives TV signals that are beamed from the Earth and reflected from these satellites on to a TV dish. These orbiting satellites have capacity to carry several hundred TV channels through their transponders and enable a viewer to receive them anywhere on the Earth.

These transponders operate in various signal bands like C band, Ka band, Ku band etc. These bands are comparable to VHF, UHF etc. frequency bands of radio signals. The TV signals from the satellites are received through dish antennas usually parabolic in shape as small as 18 inches or as large as 9 meters in diameter...

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Comcast Cable Television: Largest Telecom Company in the US

Comcast Cable has risen to become the largest telecommunication company in the Unites States since it began in 1963. Its offerings have expanded to include broadband telephone, broadband internet, and digital televisions. Comcast remains on the cutting edge of the technology and continues to deliver the newest technology to its users.

The history of Comcast Cable

Comcast was founded in Tupelo, Mississippi by Daniel Aaron, Julian A. Brodsky, and Ralph J Roberts but was originally known as American Cable Systems. Then in 1969, they moved the company headquarters to Pennsylvania and became known as the Comcast Corporation...

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