Virtual, augmented, and mixed reality systems and methods

Patent metadata

Field	Value
Publication number	US-10529063-B2
Application number	US-201715683677-A
Country	US
Kind code	B2
Filing date	Aug 22, 2017
Priority date	Aug 22, 2016
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A virtual, augmented, or mixed reality display system includes a display configured to display virtual, augmented, or mixed reality image data, the display including one or more optical components which introduce optical distortions or aberrations to the image data. The system also includes a display controller configured to provide the image data to the display. The display controller includes memory for storing optical distortion correction information, and one or more processing elements to at least partially correct the image data for the optical distortions or aberrations using the optical distortion correction information.

First claim

The invention claimed is:

1. A virtual, augmented, or mixed reality display system comprising:
a display configured to display distortion-corrected image data, the display comprising one or more optical components which introduce optical distortions or aberrations to the distortion-corrected image data, wherein the display comprises a plurality of at least partially distinct optical paths; and
a display controller configured to provide the distortion-corrected image data to the display, the display controller comprising:
memory for storing optical distortion correction information, wherein the optical distortion correction information comprises separate optical distortion correction information for respective colors of the optical paths of the display, and
one or more processing elements to at least partially correct non-distortion-corrected image data for the optical distortions or aberrations using the optical distortion correction information;

wherein the display controller is configured to pre-distort the non-distortion-corrected image data to obtain the distortion-corrected image data by determining a distortion-corrected pixel at a first location (x, y) for the distortion-corrected image data based on one or more non-distortion-corrected pixels near a different second location (x′, y′) in the non-distortion-corrected image data received by the display controller; and
wherein the display controller is configured to use the optical distortion correction information to determine the second location (x′, y′) in the non-distortion-corrected image data.

2. The system of claim 1 , wherein the optical distortion correction information is used by the display controller to pre-distort the non-distortion-corrected image data in a way that is at least partially inversely related to the optical distortions or aberrations.

3. The system of claim 1 , wherein the (x′, y′) coordinates of the second location are fractional numbers.

4. The system of claim 3 , wherein the display controller is configured to determine the distortion-corrected pixel at the first location (x, y) by interpolating between a plurality of non-distortion-corrected pixels surrounding the second location (x′, y′).

5. The system of claim 4 , wherein the display controller uses bilinear interpolation.

6. The system of claim 1 , wherein the optical distortion correction information is stored in the form of one or more lookup tables.

7. The system of claim 6 , wherein the one or more lookup tables are stored in a compressed format, and wherein the display controller is configured to expand the one or more lookup tables before correcting for the optical distortions or aberrations using the optical distortion correction information.

8. The system of claim 1 , wherein the optical distortion correction information further comprises information for performing one or more image warp operations, and wherein the display controller is further configured to perform the one or more image warp operations on the non-distortion-corrected image data.

9. The system of claim 1 , wherein the display is configured to display the colors sequentially.

10. A method in a virtual, augmented, or mixed reality display system, the method comprising:
providing distortion-corrected image data to be shown on a display, the display comprising one or more optical components which introduce optical distortions or aberrations to the distortion-corrected image data, wherein the display comprises a plurality of at least partially distinct optical paths;
storing optical distortion correction information, wherein the optical distortion correction information comprises separate optical distortion correction information for respective colors of the optical paths of the display;
at least partially correcting non-distortion-corrected image data for the optical distortions or aberrations using the optical distortion correction information; and
displaying the distortion-corrected image data to the user with the display;
wherein the act of at least partially correcting the non-distortion-corrected image data comprises:
pre-distorting the non-distortion-corrected image data to obtain the distortion-corrected image data by determining a distortion-corrected pixel at a first location (x, y) for the distortion-corrected image data based on one or more non-distortion-corrected pixels near a different second location (x′, y′) in the non-distortion-corrected image data; and
using the optical distortion correction information to determine the second location (x′, y′) in the non-distortion-corrected image data.

11. The method of claim 10 , further comprising using the optical distortion correction information to pre-distort the non-distortion-corrected image data in a way that is at least partially inversely related to the optical distortions or aberrations.

12. The method of claim 10 , wherein the (x′, y′) coordinates of the second location are fractional numbers.

13. The method of claim 12 , further comprising determining the distortion-corrected pixel at the first location (x, y) by interpolating between a plurality of non-distortion-corrected pixels surrounding the second location (x′, y′).

14. The method of claim 13 , further comprising using bilinear interpolation.

15. The method of claim 10 , further comprising storing the optical distortion correction information in the form of one or more lookup tables.

16. The method of claim 15 , further comprising storing the one or more lookup tables in a compressed format, and expanding the one or more lookup tables before correcting for the optical distortions or aberrations using the optical distortion correction information.

17. The method of claim 10 , wherein the optical distortion correction information further comprises information for performing one or more image warp operations, and further comprising performing the one or more image warp operations on the non-distortion-corrected image data.

18. The method of claim 10 , wherein the display is configured to display the colors sequentially.

Assignees

• Magic Leap Inc

Inventors

• Rodriguez Jose Felix
• Perez Ricardo Martinez

Classifications

• G06T2207/10024

  Color image · CPC title

• G09G2370/04

  Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller · CPC title

• G06F3/14 Primary

  Digital output to display device {; Cooperation and interconnection of the display device with other functional units} · CPC title

• G06T2210/44

  Morphing · CPC title

• G06T3/4007

  based on interpolation, e.g. bilinear interpolation (image demosaicing G06T3/4015; edge-driven or edge-based scaling G06T3/403) · CPC title