Optics: image projectors – Composite projected image – Multicolor picture
Patent
1996-12-17
1999-02-09
Dowling, William
Optics: image projectors
Composite projected image
Multicolor picture
353 84, 345 32, G03B 2114
Patent
active
058684808
ABSTRACT:
A projection apparatus provides a projection engine that supplies polarized light to a dielectric filter (or diffraction grating). The dielectric filter provides an array of pixels that each pass selected colors of light and reflect other colors. Each pixel is subpixelated (for example, red, green, and blue subpixels) so that a single subpixel passes a selected color (for example, red) and reflects the other colors (for example, green and blue). A digital micromirror device has an array of mirrors that correspond in number to the number of subpixels of the dielectric filter. Each of the mirrors provide "on" and "off" positions for selectively transmitting a desired color of light from the mirror to an image screen. The image screen receives light reflected by selected of the mirrors of the array of micromirrors when the selected mirrors are in the "on" position. The micromirror device can be controlled with a computer, television, signal, video signal, or the like.
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Compaq Computer Corporation
Dowling William
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