DUMP PATH LIGHT INTENSITY SENSING IN LIGHT PROJECTOR
First Claim
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1. A light projection system comprising:
- a projection subsystem configured at least to project an image;
an image forming subsystem comprising;
a light source subsystem configured at least to generate light, anda light modulation subsystem configured at least to cause the light to follow either a light dump path or an image path in a manner consistent with image data, the light dump path not leading to the projection subsystem, and the image path leading to the projection subsystem; and
a light-intensity-measurement subsystem configured at least to determine an intensity of the light and comprising a light-intensity sensor in the light dump path.
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Abstract
In a light projection system, potentially hierarchical levels of light intensity control ensure proper laser-light output intensity, color channel intensity, white point, left/right image intensity balancing, or combinations thereof. The light projection system can include a light intensity sensor in an image path, in a light-source subsystem light-dump path, in a light-modulation subsystem light-dump path, in a position to measure light leaked from optical components, or combinations thereof.
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Citations
14 Claims
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1. A light projection system comprising:
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a projection subsystem configured at least to project an image; an image forming subsystem comprising; a light source subsystem configured at least to generate light, and a light modulation subsystem configured at least to cause the light to follow either a light dump path or an image path in a manner consistent with image data, the light dump path not leading to the projection subsystem, and the image path leading to the projection subsystem; and a light-intensity-measurement subsystem configured at least to determine an intensity of the light and comprising a light-intensity sensor in the light dump path. - View Dependent Claims (2, 3, 4, 5)
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6. A method for measuring light intensity generated by a light projection system, the method comprising:
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generating light from a light source subsystem; directing the light, by a light modulation subsystem, along either an image path or a light dump pat in a manner consistent with image data, the image path leading to a projection subsystem configured at least to project an image, and the light dump path not leading to the projection subsystem; and determining an intensity of the light with in image sensor in the light dump path. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification