Projection display device
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United States of America Patent
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-
May 1, 2007
Grant Date -
Mar 31, 2005
app pub date -
Sep 15, 2004
filing date -
Sep 26, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The projection display device stores, in a frame memory, a shot image of a test pattern for cases where the obstacle is not represented in the region of the projection; compares, at a comparison unit, a shot image of the test pattern for the case where the obstacle is represented in the region of the projection, with the stored shot image of the test pattern in order to detect an obstacle present in the region of the projection; generates, at an image-mask enlargement-processing unit, an image mask section having a region larger than the region of the detected obstacle; and effects, at a luminance control unit, a control to reduce the luminance in the image mask section.
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Cited Art Landscape
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