Optical module having pixel shifting mechanism transitioning to first state or second state, method for controlling the same, and projection-type display apparatus

1. An optical module comprising:

a light modulator that modulates light and includes a plurality of pixels;

a pixel shift mechanism, and

a light incident position swapping mechanism,

wherein the pixels of the light modulator each include a first sub-pixel on which a first color light flux or a second color light flux is incident, a second sub-pixel on which a color light flux different from the color light flux incident on the first sub-pixel out of the first color light flux and the second color light flux is incident, and a third sub-pixel and a fourth sub-pixel on which a third color light flux is incident,

the pixel shift mechanism transitions to

a first state in which the third sub-pixel is located on a first position and the fourth sub-pixel is located on a second position, or

a second state in which the third sub-pixel is located on a third position and the fourth sub-pixel is located on a fourth position,

the light incident position swapping mechanism swaps the first color light for the second color light on the first sub-pixel and swaps the second color light for the first color light on the second sub-pixel, in the first state, and

the light incident position swapping mechanism swaps the second color light for the first color light on the first sub-pixel and swaps the first color light for the second color light on the second sub-pixel, in the second state.

2. The optical module according to claim 1 ,

wherein the pixel shift mechanism transitions to the first state or the second state in a cycle that is half a rewriting cycle for a display screen,

the light incident position swapping mechanism swaps the first color light or the second color light in a cycle that is half of the rewriting cycle for the display screen,

a timing of transitioning by the pixel shift mechanism and a timing of swapping by the light incident position swapping mechanism are different each other.

3. The optical module according to claim 1 , wherein the third color light is green light.

4. The optical module according to claim 1 ,

wherein the first position and the third position are arranged in a first direction, and

the second position and the fourth position are arranged in the first direction but differ in a second direction that intersects the first direction from the first position and the third position.

5. The optical module according to claim 1 ,

wherein the first sub-pixel and the third sub-pixel are arranged in a first direction and

the second sub-pixel and the fourth sub-pixel are arranged in the first direction in positions different in a second direction that intersects the first direction from the positions of the first sub-pixel and the third sub-pixel.

6. The optical module according to claim 5 ,

wherein

the first sub-pixel, the second sub-pixel, the third sub-pixel, and the fourth sub-pixel are arranged in a matrix formed of two rows and two columns.

7. The optical module according to claim 1 ,

wherein the pixel shift mechanism performs

a first shift operation in which the pixel shift mechanism transitions from the first state to the second state, and

a second shift operation in which the pixel shift mechanism transitions from the second state to the first state.

8. The optical module according to claim 1 ,

wherein the pixel shift mechanism shifts an optical path of video image light modulated by the light modulator.

9. The optical module according to claim 1 ,

wherein the pixel shift mechanism shifts a position of the light modulator.

10. A projection-type display apparatus comprising:

the optical module according to claim 1 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

11. A projection-type display apparatus comprising: the optical module according to claim 2 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

12. A projection-type display apparatus comprising:

the optical module according to claim 3 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

13. A projection-type display apparatus comprising:

the optical module according to claim 4 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

14. A projection-type display apparatus comprising:

the optical module according to claim 5 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

15. A projection-type display apparatus comprising:

the optical module according to claim 6 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

16. A projection-type display apparatus comprising:

the optical module according to claim 7 ; and

a projection optical system that enlarges and projects video image light incident from the optical module.

17. A method for controlling an optical module including a light modulator, a pixel shift mechanism, and a light incident position swapping mechanism,

the light modulator modulating light and including a plurality of pixels,

the pixels of the light modulator each including a first sub-pixel on which a first color light flux or a second color light flux is incident, a second sub-pixel on which a color light flux different from the color light flux incident on the first sub-pixel out of the first color light flux and the second color light flux is incident, and a third sub-pixel and a fourth sub-pixel on which a third color light flux is incident,

the method comprising:

causing the pixel shift mechanism to transition to

a first state in which the third sub-pixel is located on a first position and the fourth sub-pixel is located on a second position, or

a second state in which the third sub-pixel is located on a third position and the fourth sub-pixel is located on a fourth position, and

causing the light incident position swapping mechanism to

swap the first color light for the second color light on the first sub-pixel and swap the second color light for the first color light on the second sub-pixel, in the first state, and

swap the second color light for the first color light on the first sub-pixel and swap the first color light for the second color light on the second sub-pixel, in the second state.

18. The method for controlling an optical module according to claim 17 ,

causing the first color light and then the second color light to be incident on the first sub-pixel and the second color light and then the first color light to be incident on the second sub-pixel in the first state; and

causing the second color light and then the first color light to be incident on the first sub-pixel and the first color light and then the second color light to be incident on the second sub-pixel in the second state.

19. The method for controlling an optical module according to claim 17 , the method further comprising:

performing a first shift operation in which the pixel shift mechanism transitions from the first state to the second state, and

performing a second shift operation in which the pixel shift mechanism transitions from the second state to the first state.

20. The method for controlling an optical module according to claim 19 , the method further comprising

shifting the light modulator in a direction that intersects a direction in which the third sub-pixel and the fourth sub-pixel are arranged in the first shift operation and the second shift operation.