Multi-mode color filter
AssigneeTexas Instruments Incorporated
InventorMichael T. Davis
Life of this patent
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Abstract
A multi-mode color filter 400 having an inner hub region 402 used to mount the color filter 400 to a motor shaft. A first track 404 and a second track 406 of color filter segments are formed on the color filters as is an optional clear track 406. The first and second tracks each have a different set of color filters. One set of filters is chosen to improve image brightness, another set is selected to improve color saturation. Typically, the set of filters used to improve brightness includes one or more clear segments, while the set of filters selected to improve color saturation does not. Depending on the image being projected, the user or the display controller moves the color wheel to select a particular filter set.
Claims40
A color filter comprising:
- a center hub portion;
- a first track comprised of a first plurality of color filters around a perimeter of said hub portion;
- and
- a second track comprised of a second plurality of color filters around a perimeter of said first track.
A display system comprising:
- a light source producing a beam of light;
- a color filter comprising:
- a center hub portion;
- a first track comprised of a first plurality of color filters around a perimeter of said hub portion;
- and
- a second track comprised of a second plurality of color filters around a perimeter of said first track;
- and
- a spatial light modulator receiving said filtered beam of light and selectively modulating said filtered beam of light in response to electronic image data.
A method of producing a color image, comprising:
- providing a beam of white light;
- providing a color filter having first track comprised of a plurality of color filters and a second track comprised of a plurality of color filters;
- moving said color filter to position one of said first and second tracks in said beam of light;
- spinning said color filter to sequentially filter said beam of light;
- selectively modulating said filtered beam of light in response to electronic image data;
- and
- focusing said selectively modulated beam of light onto an image plane.
Dependencies are inferred from the claim text.