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A CRT projector is a video projector that uses a small, high-brightness cathode ray tube (CRT) as the image generating element. The image is then focused and enlarged onto a screen using a lens kept in front of the CRT face. The first color CRT projectors came out in the early 1950s.
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...
Glass display tube is evacuated and carries risk of implosion if improperly handled. May be risky and expensive to repair due to complexity of the display; [52] units with mercury CCFL backlight lamps are an environmental health hazard [53] Screen itself cannot be repaired if the gas used to generate images leaks [54]
In 1980, Mitsubishi introduced the first large-scale video board, [7] the Diamond Vision, which was a large screen using cathode-ray tube technology similar to traditional tube televisions. [2] The first demonstration of the technology was during the 1980 Major League Baseball All-Star Game in Dodger Stadium , Los Angeles .
Super Fine Pitch tubes naturally fall into this category, as do some Sony Trinitron SDTVs that cannot physically resolve 1080 lines of vertical resolution, but the term Hi-Scan is commonly used to refer to Sony Trinitron HDTVs that do not feature an SFP tube. 16:9 Enhanced WEGA models differ from original WEGA models mainly in their ability to ...
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