Detection, analysis and correction of disparities in a display system utilizing disparity sensing port

Patent metadata

Field	Value
Publication number	US-12335453-B2
Application number	US-202117561411-A
Country	US
Kind code	B2
Filing date	Dec 23, 2021
Priority date	Dec 23, 2021
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

According to examples, a system for detection, analysis and correction of disparities in display systems utilizing one or more disparity sensing port is described. The system may include a processor and a memory storing instructions. In addition, the system may include a first lens including a first waveguide for displaying a first image and a second lens including a second waveguide for displaying a second image. Furthermore, the system may include a first projector associated with the first lens to propagate first display light associated with the first image, a second projector associated with the second lens to propagate second display light associated with the second image and a disparity sensing port to receive the first display light and the second display light to determine a disparity associated with the first image and the second image.

First claim

The invention claimed is:

1. A display system, comprising:
a wearable eyewear arrangement, comprising:
a first lens assembly comprising:
a first projector to propagate first display light associated with a first image; and
a first waveguide for propagating the first image to a first eye of a user; and

a second lens assembly comprising:
a second projector to propagate second display light associated with a second image; and
a second waveguide for propagating the second image to a second eye of a user;

a bridge to couple the first lens assembly and the second lens assembly;
a disparity sensing port to receive the first display light and the second display light, wherein the first display light and the second display light are unused light; and
a processing system comprising:
a processor; and
a memory storing instructions, wherein the processing system is to:

compare the received first display light and the received second display light; and
determine, based on the comparison of the received first display light and the received second display light, at least one disparity associated with the first image and the second image.

2. The system of claim 1 , wherein the wearable eyewear arrangement further comprises a disparity sensing detector to measure the first display light and the second display light.

3. The system of claim 1 , wherein the first waveguide is comprised of a substrate and a photopolymer layer, and wherein the photopolymer layer includes one or more gratings.

4. The system of claim 3 , wherein the one or more gratings are volume Bragg gratings (VBGs).

5. The system of claim 3 , wherein the one or more gratings include an inbound volume Bragg grating (VBG), a first middle volume Bragg grating (VBG), a second middle volume Bragg grating (VBG) and an outbound volume Bragg grating (VBG).

6. The system of claim 3 , wherein the one or more gratings are tiled.

7. The system of claim 1 , wherein the disparity sensing port is located on the bridge of the wearable eyewear arrangement.

8. The system of claim 1 , wherein the wearable eyewear arrangement further comprises:
a first temple arm, wherein the first projector is located near the first temple arm; and
a second temple arm, wherein the second projector is located near the second temple arm.

9. The system of claim 1 , wherein the disparity is a misalignment between the first image propagated by the first waveguide and the second image propagated by the second waveguide.

10. The system of claim 9 , wherein the processing system is to determine a correction comprising a shifting of one of the first image propagated by the first waveguide and the second image propagated by the second waveguide based on the misalignment.

11. An apparatus, comprising:
a first projector to propagate first display light associated with a first image;
a second projector to propagate second display light associated with a second image; and
a disparity sensing port to receive the first display light and the second display light to determine a disparity associated with the first image and the second image, wherein the first display light and the second display light are unused light.

12. The apparatus of claim 11 , wherein the first projector is associated with a first lens and the second projector is associated with a second lens.

13. The apparatus of claim 12 , wherein the first lens includes a waveguide comprising one or more volume Bragg gratings (VBGs).

14. The apparatus of claim 11 , further comprising a disparity sensing detector to measure aspects of the first display light and the second display light.

15. A method for detecting a disparity in a display device, comprising:
implementing a disparity port in the display device;
utilizing the disparity port to receive light associated with an image displayed by the display device, wherein the light associated with the image is unused light; and
implementing a disparity sensing detector to measure the light associated with the image displayed by the display device.

16. The method of claim 15 , further comprising:
analyzing measured data associated with the light associated with the image; and
determining a correction associated with the measured data to correct a disparity associated with the image displayed by the display device.

17. The method of claim 16 , wherein the correction associated with the measured data is a shifting of an image projected by a lens of the display device.

18. The system of claim 1 , wherein the disparity sensing port is located between two (2) millimeters (mm) and ten (10) millimeters (mm) above the first waveguide and the second waveguide.

19. The apparatus of claim 13 , wherein the disparity sensing port is located between two (2) millimeters (mm) and ten (10) millimeters (mm) above the waveguide.

20. The method of claim 17 , wherein the lens includes a waveguide, and wherein the disparity sensing port is located between two (2) millimeters (mm) and ten (10) millimeters (mm) above the waveguide.

Assignees

• Meta Platforms Tech Llc

Inventors

• Yang Yang
• Lam Wai Sze Tiffany
• Meiser Dominic
• Chi Wanli

Classifications

• H04N2013/0081

  Depth or disparity estimation from stereoscopic image signals · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/014

  comprising information/image processing systems · CPC title

• G02B2027/0138

  comprising image capture systems, e.g. camera · CPC title

• G02B2027/0134

  of stereoscopic type · CPC title