Projector and projector system

1. A projector that projects an image on a screen, comprising:

plural image generating units that generate image lights representing the image;

a main body housing that houses the plural image generating units; and

plural projection optical units that are provided in the main body housing to respectively correspond to the plural image generating units and project the image lights generated by the plural image generating units on the screen, each of the plural image generating units is a separate unit from each of the plural projection optical units, and each of the plural image generating units and the plural projection optical units being disposed adjacent to each other, substantially in a straight line, wherein under the condition that the projector is projecting the image on the screen, the straight line is parallel to the screen.

2. The projector according to claim 1 , wherein

each of the plural image generating units generates the image light representing a partial image corresponding to a part of a display area in an image projected on the screen, and

each of the plural projection optical units projects the image light generated by each of the plural image generating units on the display area corresponding to the partial image on the screen.

3. The projector according to claim 1 , wherein

the main body housing has plural planes that form an outer surface, and

the plural projection optical units are provided on a same plane in the main body housing.

4. The projector according to claim 1 , further comprising:

plural light source units,

the plural image generating units, the plural projection optical units and the plural light source units being disposed adjacent to each other, substantially in a straight line.

5. The projector according to claim 1 , wherein an optical axis of image light projected from one of the plural projection optical units located at an end of the line of the plural projection optical units inclines in a direction opposite to a direction in which the other projection optical units adjacent to the one of the plural projection optical units are located.

6. The projector according to claim 1 , further comprising:

a light source and

a light distributing unit that distributes the light from the light source to the respective plural image generating units.

7. The projector according to claim 1 , wherein an extending and retracting unit that extends and retracts the main body housing in a direction in which the plural projection optical units are connected.

8. The projector according to claim 7 , wherein the extending and retracting unit includes a holding unit that holds a state in which the main body housing is extended or retracted.

9. The projector according to claim 7 , further comprising:

an extension and retraction detecting unit that detects an extension/retraction distance of the extended or retracted main body housing; and

an image adjusting unit that adjusts, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.

10. The projector according to claim 9 , wherein the image adjusting unit includes an expansion and reduction adjusting unit that expands and reduces, according to the extension/retraction distance detected by the extension and retraction detecting unit, an image projected on the screen.

11. The projector according to claim 9 , wherein the image adjusting unit includes an optical-axis adjusting unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, optical axes of image lights projected from the plural projection optical units.

12. The projector according to claim 9 , wherein the image adjusting unit includes an autofocus unit that moves, according to the extension/retraction distance detected by the extension and retraction detecting unit, focuses of projection lights projected from the plural projection optical units.

13. The projector according to claim 9 , wherein the image adjusting unit includes a keystone-distortion correction unit that corrects, according to the extension/retraction distance detected by the extension and retraction detecting unit, a keystone distortion of an image projected on the screen.

14. The projector according to claim 7 , wherein

each of the plural image generating units generates the image light representing a partial image corresponding to a part of a display area in an image projected on the screen, and

each of the plural projection optical units projects the image light generated by the image generating unit on the display area corresponding to the partial image on the screen.

15. A projector that projects an image on a screen, comprising:

plural image generating units that generate image lights representing the image;

a main body housing that houses the plural image generating units;

plural projection optical units in the main body housing to respectively correspond to the plural image generating units, each of the plural image generating units is a separate unit from each of the plural projection optical units, and each of the plural image generating units and the plural projection optical units being disposed adjacent to each other, substantially in a straight line, wherein under the condition that the projector is projecting the image on the screen, the straight line is parallel to the screen; and

an imaging sensor that is provided between the plural projection optical units.

16. The projector according to claim 7 , wherein

the extending and contracting unit includes a first section, a second section and a third section, and

the first section housing a first projection optical unit, the second section housing a second projection optical unit and the third section disposed between the first section and second section and slidably connected to each of the first section and second section.

17. A projector that projects an image on a screen, comprising:

plural image generating units that generate image lights representing the image;

a main body housing that houses the plural image generating units;

plural projection optical units that are provided in the main body housing to respectively correspond to the plural image generating units and project the image lights generated by the plural image generating units on the screen, each of the plural image generating units and the plural projection optical units being disposed adjacent to each other, substantially in a straight line; and

an extending and retracting unit that extends and retracts the main body housing in a direction in which the plural projection optical units are connected, wherein

the extending and contracting unit includes a first section, a second section and a third section, and

the first section housing a first projection optical unit, the second section housing a second projection optical unit and the third section disposed between the first section and second section and slidably connected to each of the first section and second section.