Rear projection type display apparatus
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United States of America Patent
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-
Mar 22, 2011
Grant Date -
Nov 8, 2007
app pub date -
May 4, 2007
filing date -
May 8, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A rear projection type display apparatus, comprises an output unit that modulates a light from a light source to output a projection light; an image formation unit that has one or more optical elements, and that subjects the projection light that is output from the output unit to form an image; a Fresnel screen that displays the projection light that is subjected to form an image; a light detection unit that is disposed at a position on which a reflected light from the Fresnel screen focuses, and that detects rays; and a control unit that controls an output of the projection light by the output unit based on the rays that are detected at the light detection unit.
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