Color permuting light projector
AssigneeHewlett-Packard Development Company, L.P.
InventorLaurence Meade Hubby, Jr.
Life of this patent
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Abstract
A light projector includes a light source configured to output a light beam, a display screen configured to display a color image containing pixels, and a color filter positioned between the light source and the projection screen. The light projector also includes a device for sequentially permuting colors of the pixels for a plurality of frames. The device includes at least one of a device for shifting a position of the color filter with respect to the light beam and a device for shifting a path of the light beam that passes through the color filter.
Claims11
A light projector comprising:
- a light source configured to output a light beam;
- a display screen configured to display a color image containing pixels;
- a color filter positioned between the light source and the projection screen, said color filter comprising a mosaic of tiles having one of “n” number of colors, wherein “n” is equal to the number of color components used to display the color image on the display screen, and wherein the tiles are arranged in a spatially intermixed color pattern;
- a device for sequentially permuting colors of the pixels for a plurality of frames, said device comprising a mechanical device for shifting the position of the color filter;
- and
- a light valve positioned between the light source and the color filter, such that, the light beam from the light source impinges upon the light valve prior to passing through the color filter.
A method for permuting colors in a color image having pixels, said method comprising:
- positioning a light valve in a light beam path;
- positioning a color filter having spatially intermixed colors per pixel downstream of the light valve along the light beam path;
- and
- sequentially permuting colors of the pixels for a plurality of frames to display the color image by shifting the position of the color filter using a mechanical device, wherein the step of shifting the position of the color filter further comprises:
- shifting the color filter to a first position to display a first color at a first pixel location during a first frame;
- shifting the color filter to a second position to display a second color at the first pixel location during a second frame;
- and
- shifting the color filter to a third position to display a third color at the first pixel location during a third frame.
A system for permuting colors in a color image having pixels, said system comprising:
- means for filtering a light beam supplied from a light valve into a plurality of colors;
- and
- means for sequentially permuting the colors of the pixels, said means for sequentially permuting comprising a mechanical device for shifting the position of the means for filtering, wherein the means for sequentially permuting the colors of the pixels is configured to:
- shift the means for filtering to a first position to display a first color at a first pixel location during a first frame;
- shift the means for filtering to a second position to display a second color at the first pixel location during a second frame;
- and
- shift the means for filtering to a third position to display a third color at the first pixel location during a third frame.
A computer readable storage medium on which is embedded one or more computer programs, said one or more computer programs implementing a method for permuting colors in a color image having pixels, wherein the color image is displayed through a light valve positioned in a light beam path and a color filter having spatially intermixed colors per pixel positioned downstream of the light valve along the light beam path, said one or more computer programs comprising a set of instructions for:
- shifting the position of the color filter using a mechanical device to sequentially permute colors of the pixels for a plurality of frames to display the color image, wherein the step of shifting the position of the color filter further comprises:
- shifting the color filter to a first position to display a first color at a first pixel location during a first frame;
- shifting the color filter to a second position to display a second color at the first pixel location during a second frame;
- and
- shifting the color filter to a third position to display a third color at the first pixel location during a third frame.
Dependencies are inferred from the claim text.