Color display from a single light valve

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United States of America Patent

PATENT NO 4552441
SERIAL NO

06625926

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A color display is produced by overlaying two images from a single light valve. Filters are used to select the two primary colors used in the display. The two projection beams are folded and merged onto a dichroic mirror where they combine so that they follow an identical path to the screen. The dichroic mirror is positioned so that the two projection beams are equivalent when they strike the dichroic mirror. The dichroic mirror is an interference filter which reflects the spectral band passed by the first filter over a range of incident angles and transmits the spectral band passed by the second filter over the same range of angles.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dewey, Anthony G San Jose, CA 5 85

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