Display device including a spatial light modulator with plural image regions

• US 7,172,288 B2
• Filed: 07/31/2003
• Issued: 02/06/2007
• Est. Priority Date: 07/31/2003
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Williams, David, Pate, Michael A., Cole, Jim, Allen, Will
• Primary Examiner(s): Perkey; W. B.
• Assistant Examiner(s): Cruz; Magda
• Application Number:
  US10/632,634
• Publication Number:
  US 20050024593A1
• Time in Patent Office: 1,286 Days
• Field of Search: 353/31, 353/34, 345/30, 349/62, 349/25, 359/11
• US Class Current: 353/31
• CPC Class Codes: G03B 21/00 Projectors or projection-type viewers; Accessories therefor devices for changing pictures G03B23/00

Abstract

A display device includes a spatial light modulator and a light generator. The spatial light modulator may have an array of modulating elements with a plurality of image regions. The light generator may be configured to direct a different one of a plurality of substantially stationary light bands onto each of a plurality of the image regions of the array of modulating elements.

Claims

1. A display device comprising:

a spatial light modulator having a two-dimensional array of modulating elements forming a plurality of two-dimensional multi-pixel image regions;

a light generator configured to direct a different one of a plurality of separate light bands onto each of the plurality of image regions; and

a controller including a spatial image separator configured to assign received image information to a corresponding one of the image regions, the controller being configured to control modulation of the spatial light modulator appropriate to produce a separate multi-pixel image in each image region.

2. The display device of claim 1, where the plurality of light bands includes at least one of a red light band, a green light band, and a blue light band.

3. The display device of claim 1, where the light generator is configured to direct the plurality of bands of light onto image regions having at least one aligned edge.

4. The display device of claim 3, where the image regions are of the same size.

5. The display device of claim 4, where the array of modulating elements has a generally rectangular shape with adjacent sides having relative sizes, and the image regions have generally rectangular shapes with adjacent sides having relative sizes different than the relative sizes of the array of modulating elements.

6. The display device of claim 1, where the light bands are of different colors, and the controller is configured to control modulation of the spatial light modulator appropriate to produce differently colored component images of a composite image.

7. A display device comprising:

a spatial light modulator having an array of modulating elements forming a plurality of image regions;

a light generator configured to direct a different one of a plurality of light bands onto each of the plurality of image regions;

a buffer adapted to receive image data for an image and buffer the image data to create a frame of the image;

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image from the image data, the second sub-frame being spatially offset from the first sub-frame, the image processing unit cooperating with the spatial light modulator to modulate at least one of the image regions according to the first and second sub-frames; and

a display device adapted to alternately display the first sub-frame in a first position and the second sub-frame in a second position spatially offset from the first position.

8. The display device of claim 7, where each sub-frame includes a matrix of pixels, and the display device is adapted to overlap pixels of the first sub-frame with pixels of the second sub-frame.

9. The display device of claim 7, where the second sub-frame is spatially offset at least one of a vertical distance and a horizontal distance from the first sub-frame, and wherein the display device is adapted to shift display of the second sub-frame from display of the first sub-frame by the at least one of the vertical distance and the horizontal distance.

10. The display device of claim 7, where the image processing unit and spatial light modulator cooperate to modulate a first image region with the first sub-frame and to modulate a second image region with the second sub-frame.

11. A display device comprising:

a light source configured to produce multi-spectral light;

a spatial light modulator configured to modulate light received in a plurality of regions according to component images of a received composite Image;

an optical separator configured to separate multi-spectral light into a plurality of separate and differently colored light bands, and to direct each of the light bands onto a respective one of the regions of the array;

an optical combiner configured to combine the modulated light bands into a composite light band; and

a controller configured to control modulation of the spatial light modulator appropriate to produce differently colored multi-pixel component images of a multi-pixel composite image, the controller including a spatial image separator configured to assign received image information to a corresponding one of the image regions based on color.

12. The display device of claim 11, further comprising projection optics configured to direct the composite light band toward a display medium.

13. A display device comprising:

a spatial light modulator having a two-dimensional array of modulating elements configured to spatially modulate incident light; and

a controller configured to control modulation of the spatial light modulator appropriate to produce a differently-colored multi-pixel component image, in each of a plurality of separate two-dimensional image regions of the array of modulating elements according to received image information, the multi-pixel component images corresponding to images of different colors that when combined by concurrently displaying them on the same region of a display medium, form a multi-pixel composite color image, where the controller further includes a spatial image separator configured to assign received image information to a corresponding one of the image regions to produce a corresponding multi-pixel component image in the image region.

14. A display device comprising:

a spatial light modulator having an array of modulating elements configured to spatially modulate incident light; and

a controller configured to control modulation of the spatial light modulator appropriate to produce an image in each of a plurality of separate image regions of the array of modulating elements according to received image information, the controller comprising;

a buffer adapted to receive image data for the image and buffer the image data to create a frame of the image; and

an image processing unit adapted to define a first sub-frame and at least a second sub-frame for the frame of the image from the image data, the second sub-frame being spatially offset from the first sub-frame, the image processing unit cooperating with the spatial light modulator to modulate at least one of the image regions according to the first and second sub-frames;

wherein the display device further comprises a display device adapted to display the first sub-frame in a first position and the second sub-frame in a second position spatially offset from the first position.

15. The display device of claim 14, where each sub-frame includes a matrix of pixels, and the display device is adapted to overlap pixels of the first sub-frame with pixels of the second sub-frame.

16. The display device of claim 14, where the second sub-frame is spatially offset at least one of a vertical distance and a horizontal distance from the first sub-frame, and wherein the display device is adapted to shift display of the second sub-frame from display of the first sub-frame by the at least one of the vertical distance and the horizontal distance.

17. The display device of claim 14, where the image processing unit and spatial light modulator cooperate to modulate a first image region.