PROJECTION-TYPE DISPLAY AND CONTROL THEREOF
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United States of America Patent
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app pub date -
Oct 8, 2013
filing date -
May 28, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A projection display device that includes a set of light source units (e.g., lasers or LEDs) and a control mechanism that monitors performance of each of the units, as well as external factors, e.g., time, ambient temperature, etc. is provided. The control mechanism may dynamically adjust each light source unit, for example, to maximize longevity. In operation, an optical modulator is configured to selectively transmit light produced by a subset of the light source units according to video data included in a video signal provided to the projection-type display device. A projection lens system is configured to project light transmitted by the optical modulator along a projection path. A sensor detects real time readings related to the performance of the set of light source units. In accordance with the readings, a control circuitry dynamically controls the laser set to dynamically vary the luminance of the set of light source units.
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