Picture projection apparatus
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United States of America Patent
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-
May 27, 2003
Grant Date -
Sep 13, 2001
app pub date -
Feb 16, 2001
filing date -
Feb 18, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image projection apparatus according to the present invention includes a prime color component selection unit, made up of a temporal color separation sub-unit and a spatial color separation sub-unit, a modulation unit on which falls a light beam split in its optical path by the prime color component selection unit, and a projection unit for synthesizing and projecting the light beams from first and second spatial modulation sub-units of the modulation unit. In the image projection apparatus, the first and second spatial modulation sub-units perform spatial modulation on images corresponding to respective different prime color components. In the image projection apparatus of the present invention, two spatial modulation units are used, thus simplifying the structure and reducing the size as compared to the so-called three-plate type image projection apparatus employing three spatial modulation sub-units.
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