Method and apparatus to manage light and reduce blur in microdisplay based light engines
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United States of America Patent
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Issued Date -
Apr 19, 2007
app pub date -
Oct 14, 2005
filing date -
Oct 14, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Light is managed through the use of a light shutter. The light shutter is, for example, a variable retarder in series with a reflective linear polarizer in a polarized light beam. A comet tail effect caused by transition latencies of pixels in microdisplays of a light engine is effectively removed by closing the shutter during pixel transition times. In addition to suppressing the comet tail effect, the light shutter may also be used to level light intensity (or brightness) of an input light source that supplies a light engine, and may be used to adjust the input light intensity to more effectively utilize a full modulation range of modulating devices in the light engine.
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