Display device

• US 6,193,375 B1
• Filed: 09/21/1998
• Issued: 02/27/2001
• Est. Priority Date: 09/22/1997
• Status: Expired due to Fees

• Current Assignee: Minolta Co., Ltd. (Konica Minolta Inc.)
• Original Assignee: Minolta Co., Ltd. (Konica Minolta Inc.)
• Inventors: Sato, Akira, Nagata, Hideki
• Primary Examiner(s): DOWLING, WILLIAM C
• Application Number:
  US09/157,379
• Time in Patent Office: 890 Days
• Field of Search: 353/30, 353/34, 353/37, 353/48, 353/49, 353/82, 353/50, 353/94, 359/449, 359/451, 359/630, 359/631, 359/204, 345/9, 345/7, 348/757, 348/780, 348/782, 348/783, 348/793, 348/800, 348/745, 348/747, 352/69, 352/70, 352/133, 352/134
• US Class Current: 353/30
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066
• CPC Class Codes: G03B 37/04 with cameras or projectors providing touching or overlapping fields of view
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026

Abstract

A display device for projecting a plurality of aligned imaged produced by scanning, the projection being accomplished without producing borders between images. This display device monitors the shear between images, and the amount of the shear is fed back to the scanning units to eliminate the shear.

Claims

1. A display device, comprising:

a plurality of light sources;

a plurality of scanners for scanning light emitted from the light sources and for forming a plurality of images;

a screen onto which is projected an array of the plurality of scanned images; and

a controller for adjusting the scanning ranges of said scanners relative to one another to align the plurality of scanned images projected onto said screen.

2. A display device of claim 1, wherein the array of images are projected onto the screen from behind, relative to a viewer.

3. A display device of claim 1, wherein the screen has a plurality of portions, each of which displays one of the scanned images.

4. A display device of claim 3, wherein the each portion is flat.

5. A display device of claim 4, wherein each portion is inclined with respect to another portion.

6. A display device of claim 1, wherein the screen is spherical.

7. A display device, comprising:

a light source which emits a light;

a dividing device which divides the emitted light into a plurality of lights;

a plurality of scanners for scanning the plurality of divided lights and for forming a plurality of images;

a screen onto which is projected an array of the plurality of scanned images; and

a controller for adjusting the scanning ranges of said scanners relative to one another to align the plurality of scanned images projected onto said screen.

8. A display device of claim 7, wherein the array of images are projected onto the screen from behind, relative to a viewer.

9. A display device of claim 7, wherein the screen has a plurality of portions, each of which displays one of the scanned images.

10. A display device of claim 9, wherein the each portion is flat.

11. A display device of claim 10, wherein each portion is inclined with respect to another portion.

12. A display device of claim 7, wherein the screen is spherical.

13. A display device of claim 7, wherein the images projected on the screen are intermediate images.

14. A display device of claim 7, further comprising:

a sensor for monitoring a border area between images; and

wherein said controller controls a position of the image on the screen based on an output of the sensor.

15. A display device, comprising:

a plurality of light sources;

a plurality of scanners for scanning light emitted from the light sources and for forming a plurality of images;

a screen onto which is projected an array of the plurality of scanned images;

a sensor for monitoring a border area between images; and

a controller for controlling a position of the image on the screen based on an output of the sensor.

16. A display device of claim 15, wherein the array of images are projected onto the screen from behind, relative to a viewer.

17. A display device of claim 15, wherein the screen has a plurality of portions, each of which displays one of the scanned images.

18. A display device of claim 17, wherein the each portion is flat.

19. A display device of claim 18, wherein each portion is inclined with respect to another portion.

20. A display device of claim 15, wherein the screen is spherical.