Image display device having a plurality of basic-color projection units

1. An image display device comprising

a plurality of projection units, each of which having a light source section emitting one of basic-color lights, a spatial light modulation section modulating the basic-color light emitted from the light source section according to an image signal, and a projection system projecting an image based on the basic-color light modulated by the spatial light modulation section onto a screen, wherein

the projection units are arranged in an array, and a plurality of the images, each of which is projected by each of the projection units, are combined on the screen to form a composite image, and

wherein the images projected by adjacent projection units emitting the same basic-color light are arranged so as to be partially superposed at peripheral portions of the images.

2. The image display device according to claim 1 , wherein the projection units are orthogonally arranged in a grid array arrangement.

3. The image display device according to claim 1 , wherein the images based on the basic-color lights combined on the screen are superposed in areas corresponding to an orthogonal grid array arrangement of the projection units.

4. The image display device according to claim 1 , wherein the projection units are arranged in a staggered array arrangement.

5. The image display device according to claim 1 , wherein the images based on the basic-color lights combined on the screen are superposed in areas corresponding to a staggered array arrangement of the projection units.

6. The image display device according to claim 1 ,

wherein the projection units include:

a plurality of first polarized light projection units each of which projecting an image of a first polarization; and

a plurality of second polarized light projection units each of which projecting an image of a second polarization, and

wherein each of the first polarized light projection units projects onto the screen the image formed from one of the basic-color lights, each of the second polarized light projection units projects onto the screen the image formed from one of the basic-color lights, and the images projected by the first polarized light projection units and by the second polarized light projection units are combined on the screen to form a composite image.

7. The image display device according to claim 6 , further comprising glasses having a transmission portion for one eye of a viewer which transmits only the first polarized light projected from the first polarized light projection units via the screen, and a transmission portion for the other eye of the viewer which transmits only the second polarized light projected from the second polarized light projection units via the screen.

8. The image display device according to claim 6 , wherein the first polarized light projection units and the second polarized light projection units are orthogonally arranged in a grid array arrangement.

9. The image display device according to claim 6 , wherein the images, each of which is formed from one of the basic-color lights, combined on the screen to form a composite image are superposed in an area corresponding to an orthogonal array arrangement of the first polarized light projection units and the second polarized light projection units.

10. The image display device according to claim 6 , wherein the first polarized light projection units and the second polarized light projection units are arranged in a staggered array arrangement.

11. The image display device according to claim 6 , wherein the images, each of which is formed from one of the basic-color lights, combined on the screen to form a composite image are superposed in an area corresponding to a staggered array arrangement of the first polarized light projection units and the second polarized light projection units.

12. The image display device according to claim 1 , wherein the spatial light modulation section has a light emission face emitting the basic-color light, the light emission face is positioned to be perpendicular to an optical axis of the projection system, and a center axis of a light beam emitted from the light emission face is shifted from the optical axis of the projection system.

13. An image display device comprising

a plurality of projection units, each of which having a light source section emitting one of basic-color lights, a spatial light modulation section modulating the basic-color light emitted from the light source section in response to an image signal, and a projection system projecting an image based on the basic-color light modulated by the spatial light modulation section onto a first surface,

wherein the projection units include:

a plurality of first polarized light projection units each of which projecting an image of a first polarized light; and

a plurality of second polarized light projection units each of which projecting an image of a second polarization, and

wherein each of the first polarized light projection units projects onto the first surface the image formed from one of basic-color lights, each of the second polarized light projection units projects onto the first surface the image formed from one of the basic-color lights, and the images projected by the first polarized light projection units and by the second polarized light projection units are combined on the first surface to form a composite image, and

wherein each of the projection units has an emission face emitting one of the basic-color lights, and the emission faces are arranged side by side on a second surface which is in a prescribed position with respect to the first surface.

14. The image display device according to claim 13 , further comprising glasses having a transmission portion for one eye of a viewer which transmits only the first polarized light projected from the first polarized light projection units via the first surface, and a transmission portion for the other eye of the viewer which transmits only the second polarized light projected from the second polarized light projection units via the first surface.

15. The image display device according to claim 13 , wherein the emission faces are arranged side by side on the second surface, in a first direction and in a second direction different from the first direction.

16. The image display device according to claim 13 , wherein the emission faces are arranged in mutual proximity on the second surface.

17. The image display device according to claim 13 , wherein each of the projection units has an emission face emitting one of the basic-color lights, and at least two of the projection units project from the emission faces basic-color lights being the same each other so that images of the same basic-color light are projected adjacent to each other on the first surface.

18. The image display device according to claim 13 , wherein the projection units include:

a first basic-color light projection unit projecting a first basic-color light;

a second basic-color light projection unit projecting a second basic-color light; and

a third basic-color light projection unit projecting a third basic-color light,

wherein the emission face of first basic-color light projection unit, the emission face of second basic-color light projection unit, and the emission face of third basic-color light projection unit are arranged in a staggered array arrangement on the second surface.

19. The image display device according to claim 13 , wherein the spatial light modulation section has a light emission face emitting the basic-color light, the light emission face is positioned to be perpendicular to an optical axis of the projection system, and a center axis of a light beam emitted from the light emission face is shifted from the optical axis of the projection system.