Image display system with channel selection device

• US 20080043209A1
• Filed: 08/18/2006
• Published: 02/21/2008
• Est. Priority Date: 08/18/2006
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Chang, Nelson Liang An, Damera-Venkata, Niranjan, Widdowson, Simon
• Application Number:
  US11/506,566
• Publication Number:
  US 20080043209A1
• Time in Patent Office: Days
• US Class Current: 353/94
• CPC Class Codes: G03B 21/26 Projecting separately subsidiary matter simultaneously with main image
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026
• CPC Class Codes: H04N 9/3188 Scale or resolution adjustment scaling in general G06T3/40; resolution modifying circuits for displays in general G09G5/391

Abstract

An image display system includes a first projector configured to project a first sub-frame onto a display surface to form at least a portion of a first image, a second projector configured to project a second sub-frame onto the display surface simultaneous with the projection of the first sub-frame to form at least a portion of a second image, the second sub-frame at least partially overlapping with the first image on the display surface, and a channel selection device configured to simultaneously allow a viewer to see the first image and prevent the viewer from seeing the second image.

Claims

1. An image display system comprising:

a first projector configured to project a first sub-frame onto a display surface to form at least a first portion of a first image;

a second projector configured to project a second sub-frame onto the display surface simultaneous with the projection of the first sub-frame to form at least a first portion of a second image, the second sub-frame at least partially overlapping with the first image on the display surface; and

a channel selection device configured to simultaneously allow a viewer to see the first image and prevent the viewer from seeing the second image.

2. The image display system of claim 1 wherein the channel selection device is configured to selectively allow the viewer to see either the first image or the second image.

3. The image display system of claim 1 wherein the channel selection device is configured to selectively prevent the viewer from seeing either the first image or the second image.

4. The image display system of claim 1 further comprising:

a third projector configured to project a third sub-frame onto the display surface simultaneous with the projection of the first sub-frame to form at least a second portion of the first image; and

a sub-frame generator configured to generate at least the first and the third sub-frame based on a first geometric relationship between a hypothetical reference projector and each of the first and the third projectors.

5. The image display system of claim 4 further comprising:

a fourth projector configured to project a fourth sub-frame onto the display surface simultaneous with the projection of the first sub-frame to form at least a second portion of the second image; and

wherein the sub-frame generator is configured to generate at least the second and the fourth sub-frame based on a second geometric relationship between the hypothetical reference projector and each of the second and the fourth projectors.

6. The image display system of claim 1 wherein the channel selection device includes a first projector comb filter configured to filter a first set of frequency ranges from the first projector, wherein the channel selection device includes a second projector comb filter configured to filter a second set of frequency ranges from the second projector, wherein the first set of frequency ranges differs from the second set of frequency ranges, and wherein the channel selection device includes a first viewer comb filter configured to filter the first set of frequency ranges.

7. The image display system of claim 6 wherein the first projector includes the first projector comb filter, and wherein the second projector includes the second projector comb filter.

8. The image display system of claim 6 wherein the channel selection device includes a second viewer comb filter configured to filter the second set of frequency ranges.

9. The image display system of claim 1 wherein the channel selection device includes a first polarizer configured to polarize the first image from the first projector using a first polarization, a second polarizer configured to polarize the second image from the second projector using a second polarization that is a complement of the first polarization.

10. The image display system of claim 1 wherein the channel selection device includes at least one shutter device.

11. The image display system of claim 1 wherein the channel selection device includes a lenticular array configured to direct the first image so that the viewer can see the first image and direct the second image so that the viewer cannot see the second image.

12. A method comprising:

displaying a first video stream on a display surface with at least a first projector to form a first set of displayed images;

displaying a second video stream on the display surface with at least a second projector simultaneous with displaying the first video stream to form a second set of displayed images, that second video stream at least partially overlapping with the first video stream on the display surface; and

providing a channel selection device configured to select at least one of the first set of displayed images and the second set of displayed images for viewing by a viewer.

13. The method of claim 12 further comprising:

displaying a third video stream on the display surface using at least a third projector simultaneous with displaying the first video stream such that third video stream at least partially overlaps with the first video stream on the display surface; and

wherein the channel selection device is configured to select at least one of the first video stream, the second video stream, and the third video stream for viewing.

14. The method of claim 12 further comprising:

filtering a first set of frequency ranges from the first video stream prior to the first set of displayed images appearing on the display surface; and

filtering a second set of frequency ranges from the second set of displayed images prior to the second video stream appearing on the display surface, the second set of frequency ranges differing from the first set of frequency ranges; and

filtering first set of frequency ranges from the first and the second sets of displayed images subsequent to the first and the second sets of displayed images appearing on the display surface.

15. The method of claim 12 further comprising:

polarizing the first video stream with a first polarization prior to the first set of displayed images appearing on the display surface; and

polarizing the second video stream with a second polarization that differs from the first polarization prior to the second set of displayed images appearing on the display surface; and

filtering the first and the second sets of displayed images with the first polarization subsequent to the first and the second sets of displayed images appearing on the display surface.

16. The method of claim 13 further comprising:

displaying the first video stream on the display surface with at least the first projector and a third projector using first and second sub-frames formed according to a geometric relationship between the first and the third projectors to form the first set of displayed images.

17. A system comprising:

a first set of projectors configured to project a first video stream onto a display surface;

a second set of projectors configured to project a second video stream onto the display surface so that the second video stream at least partially and simultaneously overlaps with the first video stream on the display surface; and

a channel selection device configured to allow one of a first channel that includes only the first video stream, a second channel that includes only the second video stream, and a third channel that includes both of the first video stream and the second video stream to be seen by a first viewer.

18. The system of claim 17 wherein the channel selection device is configured to selectively allow a different one of the first channel, the second channel, and the third channel to be seen by a second viewer.

19. The system of claim 17 further comprising:

a sub-frame generator;

wherein the first set of projectors includes at least two projectors,

wherein the a sub-frame generator is configured to generate a first plurality of sub-frames that form the first video stream according to a first geometric relationship between the first set of projectors, and wherein the first set of projectors are configured to simultaneously project the first plurality of sub-frames.

20. The system of claim 19 wherein the second set of projectors includes at least two projectors, wherein the a sub-frame generator is configured to generate a second plurality of sub-frames that form the second video stream according to a second geometric relationship between the second set of projectors, and wherein the second set of projectors are configured to simultaneously project the second plurality of sub-frames.