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TV Types (p. 1 of 2)

Since the arrival of television in the 1950s, there is an evolution in different technologies that allow people to receive signals and display broadcast programs on a screen.

The earliest technology is the carthode ray tube (CRT). First, there were black & white units, then came color. A TV with a CRT is essentially a heavy box that sits on the floor or a table. These came with a dial or buttons preset to specific stations. Many of them have rabbit ears, loop or bow-tie antennas at the back for picking up local broadcasts.

Besides a tube type TV, there are other choices available. These include: plasma, LCD (liquid-crystal display) and HDMI compatible computer monitors that you can hang on your wall.

There were attempts to make miniture sets with screens less than 5". With digital signals, people often think of getting the HD-TV experience with a large set. There are also attempts to make portable devices for receiving TV signals anywhere.

The main differences between TV types is the size, lifespan in # hours the unit will operate and the resolution that can be displayed. Any TV can receive free digital signals as long as you have an ATSC converter. To make use of high-resolution theater-experience from TV viewing, you need a TV certified as HDTV (High Definition) and stations that broadcast in the HD format. Otherwise, you can watch your programs in the lower SD or Standard Definition format at 480 lines. Most people do not consider a computer monitor as a TV. When you put a TV card or an USB TV receiver device to a computer, you can watch digital TV broadcasts.

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