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DLP, or digital light processing, is also called DMD, Digital Micromirror Device. It is a process that was developed by Texas Instruments for high quality image reproduction. It is based on the movements of a multitude of micromirrors that reflect more or less light to rebuild the detail and contrast values of an image through a video or overhead projector lens. Colour is reconstituted by a code wheel that contains several red, blue and green segments and rotates between the lamp and the matrix at a synchronised speed. The number of mirrors determines the image resolution. A new generation of DLPs composed of three matrices for the three primary colours makes it possible to dispense with the code wheel on some very up-market video projectors.


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