Apparatus and method for processing a projected image, and projection display system

1. An apparatus for processing a projected image, the apparatus comprising:

at least one processor; and

a memory communicatively connected with the at least one processor, the memory storing instructions executable by the at least one processor, the instructions executed by the at least one processor to cause the at least one processor to:

obtain an image to be projected, and a resolution of the image to be projected;

divide the image to be projected into multiple pixel blocks, each pixel block comprising N pixels;

generate N frames of images, each of the N frames of images including only one of the N pixels from each of the multiple pixel blocks at a same respective position in each pixel block, a resolution of each of the N frames of images no higher than a resolution of an optical valve, wherein N is a positive integer greater than 1, and a projection path of the image to be projected passes a beam angle varying device configured to adjust imaging positions of the N frames of images;

determine offset angles for the beam angle varying device to image the N frames of images according to a division pattern of the pixel blocks and relative positions of the pixels in the pixel blocks; and

display the N frames of images in a time-division mode by adjusting offset angles of the beam angle varying device sequentially according to the determined offset angles for the beam angle varying device, wherein the imaging positions of the N frames of images are offset from each other.

2. The apparatus according to claim 1 , wherein each pixel block comprises J adjacent pixels in a row direction, and K adjacent pixels in a column direction, wherein J is a positive integer more than 1 and less than N, K is a positive integer more than 1 and less than N, and a product of J and K is N.

3. The apparatus according to claim 2 , wherein a value of J is determined according to the number of pixels in a row direction of the image to be projected, and the number of pixels in a row direction of the optical valve, and a value of K is determined according to the number of pixels in a column direction of the image to be projected, and the number of pixels in a column direction of the optical valve.

4. The apparatus according to claim 1 , wherein the resolution of the image to be projected is higher than the resolution of the optical valve.

5. A projection display system, comprising:

a light source;

an optical valve;

an apparatus for processing a projected image;

a beam angle varying device; and

a lens, wherein:

the beam angle varying device is arranged between the optical valve and the lens, and is configured to adjust imaging positions of N frames of images;

the light source is configured to illuminate the optical valve, so that the optical valve projects the image frames, which are output by the beam angle varying device to the lens for imaging, and projected onto a projection medium, thus resulting in the projected image; and

the apparatus for processing a projected image comprises:

at least one processor; and

a memory communicatively connected with the at least one processor, the memory storing instructions executable by the at least one processor, the instructions executed by the at least one processor to cause the at least one processor to:

obtain an image to be projected, and a resolution of the image to be projected;

divide the image to be projected into multiple pixel blocks, each pixel block comprising N pixels;

generate N frames of images, each of the N frames of images including only one of the N pixels from each of the multiple pixel blocks at a same respective position in each pixel block, a resolution of each of the N frames of images no higher than a resolution of the optical valve, wherein N is a positive integer greater than 1; and

display the N frames of images in a time-division mode, wherein imaging positions of the N frames of images are offset from each other.

6. The system according to claim 5 , wherein each pixel block comprises J adjacent pixels in a row direction, and K adjacent pixels in a column direction, wherein J is a positive integer more than 1 and less than N, K is a positive integer more than 1 and less than N, and a product of J and K is N.

7. The system according to claim 6 , wherein a value of J is determined according to the number of pixels in a row direction of the image to be projected, and the number of pixels in the row direction of the optical valve, and a value of K is determined according to the number of pixels in a column direction of the image to be projected, and the number of pixels in a column direction of the optical valve.

8. The system according to claim 5 , wherein a projection path of the image to be projected passes a beam angle varying device configured to adjust imaging positions of the N frames of images; and

the instructions are executed by the at least one processor to further cause the at least one processor:

to determine offset angles required for the beam angle varying device to image the N frames of images, according to a division pattern of the pixel blocks, and relative positions of the pixels in the pixel blocks; and

to display the N frames of images in the time-division mode by adjusting the offset angles of the beam angle varying device sequentially according to the determined offset angles required for the beam angle varying device.

9. The system according to claim 5 , wherein the resolution of the image to be projected is higher than the resolution of the optical valve.

10. A method for processing a projected image, the method comprising:

obtaining an image to be projected, and a resolution of the image to be projected;

dividing the image to be projected into multiple pixel blocks, each pixel block comprising N pixels;

generating N frames of images, each of the N frames of images including only one of the N pixels from each of the multiple pixel blocks at a same respective position in each pixel block, a resolution of each of the N frames of images no higher than resolution of an optical valve, wherein N is a positive integer greater than 1, and a projection path of the image to be projected passes a beam angle varying device configured to adjust imaging positions of the N frames of images;

determining offset angles for the beam angle varying device to image the N frames of images according to a division pattern of the pixel blocks and relative positions of the pixels in the pixel blocks; and

displaying the N frames of images in a time-division mode by adjusting offset angles of the beam angle varying device sequentially according to the determined offset angles for the beam angle varying device, wherein the imaging positions of the N frames of images are offset from each other.

11. The method according to claim 10 , wherein each pixel block comprises J adjacent pixels in a row direction, and K adjacent pixels in a column direction, wherein both J and K are positive integers more than 1 and less than N, and a product of J and K is N.

12. The method according to claim 11 , wherein a value of J is determined according to the number of pixels in a row direction of the image to be projected, and the number of pixels in a row direction of the optical valve, and a value of K is determined according to the number of pixels in a column direction of the image to be projected, and the number of pixels in a column direction of the optical valve.

13. The method according to claim 10 , wherein the resolution of the image to be projected is higher than the resolution of the optical valve.

14. The apparatus according to claim 1 , wherein imaging positions of pixels at the same positions in two adjacent frames of images overlap one other.

15. The system according to claim 5 , wherein imaging positions of pixels at the same positions in two adjacent frames of images overlap one other.

16. The method according to claim 10 , wherein imaging positions of pixels at the same positions in two adjacent frames of images overlap one other.