A method for projecting a color image, and a method for projecting an image.

Abstract

It can provide high optical throughput, high contrast, and a wide color gamut. [Solution] An image display device and method may spatially modulate multiple color channels using a single image sensor, such as a digital mirror device (DMD). The color channels may include optical steering elements, such as phase modulators. The steered light from the optical steering elements may be combined with additional light or replaced to better display bright images. These techniques may be provided together or applied individually.

Claims

1. A method for projecting color images, The step of illuminating the image sensor with incident light of a certain color, A step of operating the image sensor to spatially modulate the incident light. Equipped with, The step of illuminating the image sensor is based on the brightness or power level of the color in the color image. I) A step in which, in the first mode of operation, the light of the color is directed onto a phase modulator that is controlled to provide a phase pattern that steers the light of the color to a desired position on the image sensor, II) The stage in which the system operates in the second mode, a. Light of the aforementioned color is directed from the light source onto the image sensor without interacting with the phase modulator, or b. The light of the aforementioned color is directed onto a phase modulator controlled to provide a phase pattern that steers the light of the aforementioned color to a desired position on the image sensor, and is combined with additional light of the aforementioned color, and the combined light is directed onto the image sensor. One of the stages selectively possessing, method.

2. The aforementioned additional light is diffused. The method according to claim 1.

3. By combining the aforementioned additional light with the steered light steered by the phase modulator, a light beam is generated that illuminates the image sensor from a common direction. The method according to claim 1 or 2.

4. The additional light includes light collected from the DC spot generated by the phase modulator. The method according to any one of claims 1 to 3.

5. The additional light includes light from an additional light source. The method according to any one of claims 1 to 4.

6. The light steered by the phase modulator has a first polarization, the additional light has a second polarization different from the first polarization, and the light steered by the phase modulator is combined with the additional light in a polarization beam splitter. The method according to any one of claims 1 to 5.

7. The light steered by the phase modulator has a first wavelength, the additional light has a second wavelength different from the first wavelength, and the light steered by the phase modulator is combined with the additional light in the dichroic element. The method according to any one of claims 1 to 6.

8. The first wavelength and the second wavelength differ by 20 nm or less than 20 nm. The method according to claim 7.

9. The aforementioned light of the aforementioned color is emitted by a light source that emits light having two polarization state components, The method comprises the step of separating the components of the emitted light, The additional light includes one of the components of the emitted light. The light steered by the phase modulator is composed of the other component of the emitted light. The method according to any one of claims 1 to 8.

10. The process includes a step of passing the emitted light through a polarization shift element and controlling the polarization shift element to change the relative intensity of the components in the two polarization states based on the brightness of the projected image, thereby changing the ratio of the light in each of the separated components. The method according to claim 9.

11. The light of a certain color is directed onto a phase modulator that is controlled to provide a phase pattern that steers the light of a certain color to a desired position on the image sensor. The additional light of the aforementioned color is combined with the steered light, The combined light, including the steered light and the additional light, is directed onto the image sensor. The process includes the step of illuminating the image sensor with light of the color, A method for projecting an image.

12. The additional light includes light collected from the DC spot generated by the phase modulator. The method according to claim 11.

13. The aforementioned additional light is diffused. The method according to claim 11 or 12.

14. The light steered by the phase modulator has a first polarization, the additional light has a second polarization different from the first polarization, and the light steered by the phase modulator is combined with the additional light in a polarization beam splitter. The method according to any one of claims 11 to 13.

15. By combining the aforementioned additional light with the steered light steered by the phase modulator, a light beam is generated that illuminates the image sensor from a common direction. The method according to any one of claims 11 to 14.

16. The light steered by the phase modulator has a first wavelength, the additional light has a second wavelength different from the first wavelength, and the light steered by the phase modulator is combined with the additional light in the dichroic element. The method according to any one of claims 11 to 15.

17. The first wavelength and the second wavelength differ by 20 nm or less than 20 nm. The method according to claim 16.

18. The aforementioned light of the aforementioned color is emitted by a light source that emits light having two polarization state components, The method comprises the step of separating the components of the emitted light, The additional light includes one of the components of the emitted light. The light steered by the phase modulator is composed of the other component of the emitted light. The method according to any one of claims 11 to 17.

19. The process includes a step of passing the emitted light through a polarization shift element and controlling the polarization shift element to change the relative intensity of the components in the two polarization states based on the brightness of the projected image, thereby changing the ratio of the light in each of the separated components. The method according to claim 18.

Images