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LCD Projector ( Sanyo, Infocus, Optoma, etc)
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LCD Projector ( Sanyo, Infocus, Optoma, etc)
An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern analog of the slide projector or overhead projector. To display images, LCD ( liquid crystal display) projectors typically send light from a Metal halide lamp through a prism that separates light to three poly silicone panels – one each for the red, green, and blue components of the video signal. As polarized light passes through the panels ( combination of polarizer, LCD panel and analyzer) , individual pixels can be opened to allow light to pass or closed to block the light. The combination of open and closed pixels can produce a wide range of colors and shades in the projected image.
Metal Halide lamps are used because they output an ideal color temperature and a broad spectrum of color. These lamps also have the ability to produce an extremely large amount of light within a small area: current projectors average about 2.000-15.000 ANSI lumens.
Other technologies, such as DLP and LCOS are also becoming more popular in modestly priced video projection.
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