Optical module, method for controlling the same, and projection-type display apparatus
An optical module includes a light modulator that modulates light and includes a plurality of pixels, and a pixel shift mechanism. The pixels of the light modulator each include a first sub-pixel on which a first color light flux is incident, a second sub-pixel on which a second color light flux is incident, a third sub-pixel on which a third color light flux is incident, and a fourth sub-pixel on which one of the first color light flux, the second color light flux, and third color light flux is incident. The pixel shift mechanism includes a first state, a second state, and a third state. The first color light flux is incident on the fourth sub-pixel in the first state. The second color light flux is incident on the fourth sub-pixel in the second state. The third color light flux is incident on the fourth sub-pixel in the third state.
1. An optical module comprising:
a light modulator that modulates light and includes a plurality of pixels; and
a pixel shift mechanism,
wherein the pixels of the light modulator each include a first sub-pixel on which a first color light flux is incident, a second sub-pixel on which a second color light flux is incident, a third sub-pixel on which a third color light flux is incident, and a fourth sub-pixel on which one of the first color light flux, the second color light flux, and third color light flux is incident,
the pixel shift mechanism includes a first state, a second state, and a third state,
the first color light flux is incident on the fourth sub-pixel in the first state,
the second color light flux is incident on the fourth sub-pixel in the second state, and
the third color light flux is incident on the fourth sub-pixel in the third state.
2. The optical module according to claim 1 ,
wherein the pixel shift mechanism performs a first shift operation of causing the first state to transition to the second state, a second shift operation of causing the second state to transition to the third state, and a third shift operation of causing the third state to transition to the first state.
3. The optical module according to claim 2 ,
wherein the light modulator is shifted toward a first direction in the first shift operation,
the light modulator is shifted toward a second direction that intersects the first direction in the second shift operation, and
the light modulator is shifted toward a third direction opposite to the first direction and a fourth direction opposite to the second direction in the third shift operation.
4. The optical module according to claim 3 ,
wherein the first sub-pixel and the second sub-pixel are arranged in the first direction, and
the third sub-pixel and the fourth sub-pixel are arranged in the first direction in positions different in the second direction from positions of the first sub-pixel and the second sub-pixel.
5. The optical module according to claim 4 ,
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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
11. A method for controlling an optical module including a light modulator and a pixel shift 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 is incident, a second sub-pixel on which a second color light flux is incident, a third sub-pixel on which a third color light flux is incident, and a fourth sub-pixel on which one of the first color light flux, the second color light flux, and the third color light flux is incident,
the method comprising:
causing the first color light flux to be incident on the fourth sub-pixel in a first state;
causing the second color light flux to be incident on the fourth sub-pixel in a second state; and
causing the third color light flux to be incident on the fourth sub-pixel in a third state.
12. The method for controlling an optical module according to claim 11 , the method further comprising:
performing a first shift operation of causing the first state to transition to the second state;
performing a second shift operation of causing the second state to transition to the third state; and
performing a third shift operation of causing the third state to transition to the first state.