Projection-display apparatus and method providing improved brightness of projected color image
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United States of America Patent
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Aug 25, 1998
Grant Date -
N/A
app pub date -
Dec 11, 1996
filing date -
Dec 12, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods and apparatus are disclose for obtaining a bright projected color image. In a representative apparatus, polarized beam splitters (one for each primary color of an image to be projected) separate p-polarized light and s-polarized light for each of the primary colors. Each separated s-and p-polarized light for each color enters a respective spatial light modulator. For each primary color, modulated light fluxes produced by the two spatial light modulators, which perform modulation of the same image, are analyzed and integrated by the polarized beam splitters. The analyzed and integrated light fluxes for each primary color are color integrated, either by projection using separate projection lenses for each color, or by a cross-dichroic prism followed by projection using a single lens.
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