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One of the earliest electronic displays is the cathode-ray tube (CRT), which was first demonstrated in 1897 and made commercial in 1922. [1] The CRT consists of an electron gun that forms images by firing electrons onto a phosphor-coated screen. The earliest CRTs were monochrome and were used primarily in oscilloscopes and black and white ...
In 2008, LCD TV shipments were up 33 percent year-on-year compared to 2007 to 105 million units. [10] In 2009, LCD TV shipments raised to 146 million units (69% from the total of 211 million TV shipments). [11] In 2010, LCD TV shipments reached 187.9 million units (from an estimated total of 247 million TV shipments). [12] [13]
Digital TV can support more than one program in the same channel bandwidth. [131] It is an innovative service that represents the first significant evolution in television technology since color television in the 1950s. [132] Digital TV's roots have been tied very closely to the availability of inexpensive, high-performance computers.
As an inherently digital device, the LCD can natively display digital data from a DVI or HDMI connection without requiring conversion to analog. Some LCD panels have native fiber-optic inputs in addition to DVI and HDMI. [156] Many LCD monitors are powered by a 12 V power supply, and if built into a computer can be powered by its 12 V power supply.
Electronic visual displays include television sets, computer monitors, and digital signage. They are ubiquitous in mobile computing applications like tablet computers, smartphones, and information appliances. Many electronic visual displays are informally referred to as touch screens.
LCD: Flat 115 [10] 292 TV, computer monitor: Yes LCD self-contained rear-projection: Flat lenticular: 70 [11] 178 TV: Yes LCD front-projection: Flat (limited only by brightness) TV or presentation Yes DLP self-contained rear-projection Flat lenticular: 120 [12] 305 TV: Yes DLP front-projection Flat (limited only by brightness) TV or ...
The elements of a simple broadcast television system are: . An image source. This is the electrical signal that represents a visual image, and may be derived from a professional video camera in the case of live television, a video tape recorder for playback of recorded images, or telecine with a flying spot scanner for the transfer of motion pictures to video).
A generic LCD TV, with speakers on either side of the screen. Liquid-crystal-display televisions (LCD TV) are television sets that use liquid-crystal displays to produce images. LCD televisions are much thinner and lighter than CRTs of similar display size and are available in much larger sizes (e.g., 90-inch or 230-centimetre diagonal). When ...