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US 7,802,889 B2Granted
Color wheel module for a projection apparatus
AssigneeYoung Optics Inc.
InventorsLong-Sheng Liao, Sung-Nan Chen, Yi-Hsueh Chen
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Abstract
A color wheel module includes a color wheel having a side face defining a plurality of color regions and a detection region, a light source for emitting light beams toward the side face of the color wheel and a light detection device for detecting the light beams from the color regions and the detection region in order to locate position of the color regions and the detection region.
Claims13
A color wheel module for a projection apparatus, comprising:
- a color wheel having a side face defining a plurality of color regions, a retainer, and a detection region on said plurality of color regions;
- wherein a distance between said detection region and a center of said side face is bigger than a radius of said retainer, and a distance between said detection region and said center of said side face is smaller than an outer radius of said color region;
- a light source for emitting light beams toward said detection region;
- and
- a light detection device for detecting said light beams from said side face in order to locate position of said color regions and said detection region.
2 more elements
Dependencies are inferred from the claim text.