Pixel adjusting at display controller for electronic display stabilization
The locations of pixels in a frame are adjusted at a display controller after the frame has been generated by a graphics processing unit (GPU) or other processor and provided to the display controller. The adjusting of the pixel locations therefore occurs as close as possible to a display panel in a display system, thereby supporting rapid changes to pixel positions.
1. A method comprising:
receiving at a display controller a first frame for display, the first frame generated based on a first pose of a user;
displaying the first frame at the display controller;
after displaying the first frame, adjusting at the display controller, based on movements of the user to a second pose, locations of pixels of a first set of pixels of the first frame to generate a first modified frame; and
displaying the first modified frame at the display controller.
2. The method of claim 1 , wherein receiving the first frame comprises receiving the first frame from a processor, and further comprising:
receiving control signaling from the processor; and
wherein adjusting the locations of the first set of pixels comprises adjusting the locations of the first set of pixels based on the control signaling.
3. The method of claim 1 , further comprising:
receiving at the display controller a second frame for display;
adjusting at the display controller locations of pixels of a second set of pixels of the second frame to generate a second modified frame; and
displaying the second modified frame at the display controller.
4. The method of claim 3 , wherein the locations of the second set of pixels in the second frame are different than the locations of the first set of pixels in the first frame.
5. The method of claim 3 , wherein adjusting the first set of pixels comprises applying a first transform to the first set of pixels and adjusting the second set of pixels comprises applying a second transform to the second set of pixels, the second transform different from the first transform.
6. The method of claim 1 , further comprising:
storing the first frame at a buffer of the display controller; and
wherein adjusting the locations of the first set of pixels comprises applying a memory address offset to memory accesses for the first set of pixels.
7. The method of claim 1 , further comprising:
storing the first frame at a buffer of the display controller; and
wherein adjusting the locations of the first set of pixels comprises multiplexing outputs of segments of the buffer to shift the locations of the first set of pixels.
8. A method implemented at a head mounted display (HMD) comprising:
receiving at a display controller a first frame for display, the first frame generated based on a first pose of the HMD;
displaying the first frame at the HMD;
after displaying the first frame, based on identified motion of the HMD, adjusting at the display controller positions of a first set of pixels of the first frame to generate a first modified frame; and
displaying the first modified frame at the HMD.
9. The method of claim 8 , wherein receiving the first frame comprises receiving the first frame from a processor, and further comprising:
receiving control signaling from the processor; and
wherein adjusting the positions of the first set of pixels comprises adjusting the positions of the first set of pixels based on the control signaling.
10. The method of claim 8 , further comprising:
receiving at the display controller a second frame for display;
adjusting at the display controller positions of a second set of pixels of the second frame to generate a second modified frame; and
displaying the second modified frame.
11. The method of claim 10 , wherein the positions of the second set of pixels in the second frame are different than the positions of the first set of pixels in the first frame.
12. The method of claim 8 , further comprising:
storing the first frame at a buffer of the display controller; and
wherein adjusting the positions of the first set of pixels comprises applying a memory address offset to memory accesses for the first set of pixels.
13. The method of claim 8 , further comprising:
storing the first frame at a buffer of the display controller; and
wherein adjusting the positions of the first set of pixels comprises multiplexing outputs of segments of the buffer to shift the positions of the first set of pixels.
14. A display controller comprising:
a buffer to store a first frame for display, the first frame generated based on a first pose of a user's head;
a display panel to display the first frame; and
a pixel position adjustment module to, after display of the first frame, adjust positions of a first set of pixels of the first frame to generate a first modified frame based a movement of the user's head to a second pose.
15. The display controller of claim 14 , wherein:
the display controller is to receive the first frame from a processor;
the display controller is to receive control signaling from the processor; and
the pixel position adjustment module is to adjust the first set of pixels based on the control signaling.
16. The display controller of claim 14 , wherein:
the buffer is to store a second frame for display;
the pixel position adjustment module is to adjust positions of a second set of pixels of the second frame to generate a second modified frame; and
the display panel is to display the second modified frame.
17. The display controller of claim 16 , wherein the positions of the second set of pixels in the second frame are different than the positions of the first set of pixels in the first frame.
18. The display controller of claim 16 , wherein the pixel position adjustment module is to adjust the first set of pixels comprises by applying a first transform to positions of the first set of pixels and to adjust the second set of pixels comprises by applying a second transform to the second set of pixels, the second transform different from the first transform.
19. The display controller of claim 14 , wherein the pixel position adjustment module comprises:
an address adjustment module to adjust the positions of the first set of pixels by applying a memory address offset to memory accesses for the first set of pixels.
20. The display controller of claim 14 , wherein the pixel position adjustment module comprises
a multiplexer to adjust the positions of the first set of pixels by multiplexing outputs of segments of the buffer applied to the display panel.