LCD projectors are systems that display or project information or video onto a surface. LCD stands for liquid crystal display, the technology used to project images. LCD projectors are the technological descendants of overhead and slide projectors, older systems which serve the same purpose. LCD projectors are most commonly used for displaying images in presentations or lectures, but are also used in home theater applications.
Video signals are comprised of three colors: red, green, and blue. LCD projectors contain a separate glass panel for each. Each panel consists of two plates of glass with a layer of liquid crystal between them. When a charge is applied, the crystals open to allow light through or close to block it. This opening and closing of pixels is what forms the image.
LCD projectors use dichroic mirrors to split the light from the input source into red, green, and blue components. Each then passes through the corresponding panel, where pixels form an image. The three colors are then recombined in a prism before being projected through a lens.LCD projectors use separate panels for each color because it results in better color saturation than using a single panel for all three. For more information about LCD projector please click here http://www.wisegeek.com/what-are-lcd-projectors.htm
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