Reprojection OLED display for augmented reality experiences

• US 9,443,355 B2
• Filed: 06/28/2013
• Issued: 09/13/2016
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Chan, Calvin, Margolis, Jeffrey Neil, Pearson, Andrew, Shetter, Martin, Michail, Ashraf Ayman, Corlett, Barry
• Primary Examiner(s): ZALALEE, SULTANA MARCIA
• Application Number:
  US13/931,554
• Publication Number:
  US 20150002542A1
• Time in Patent Office: 1,173 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/048 Interaction techniques based on graphical user interfaces [GUI]
• CPC Class Codes: G06T 19/006 Mixed reality object pose determination, tracking or camera calibration for mixed reality G06T7/00
• CPC Class Codes: G06T 2207/30244 Camera pose
• CPC Class Codes: G06T 3/02 Affine transformations for image registration G06T3/147; for image mosaicing G06T3/4038
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G09G 2300/0804 Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements
• CPC Class Codes: G09G 2340/0435 Change or adaptation of the frame rate of the video stream
• CPC Class Codes: G09G 2340/0464 Positioning
• CPC Class Codes: G09G 2340/0471 Vertical positioning
• CPC Class Codes: G09G 2340/0478 Horizontal positioning
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/007 Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels
• CPC Class Codes: G09G 3/3225 using an active matrix

Abstract

Methods for generating and displaying images associated with one or more virtual objects within an augmented reality environment at a frame rate that is greater than a rendering frame rate are described. The rendering frame rate may correspond with the minimum time to render images associated with a pose of a head-mounted display device (HMD). In some embodiments, the HMD may determine a predicted pose associated with a future position and orientation of the HMD, generate a pre-rendered image based on the predicted pose, determine an updated pose associated with the HMD subsequent to generating the pre-rendered image, generate an updated image based on the updated pose and the pre-rendered image, and display the updated image on the HMD. The updated image may be generated via a homographic transformation and/or a pixel offset adjustment of the pre-rendered image by circuitry within the display.

Claims

1. A mobile device, comprising:

one or more processors configured to determine a first predicted pose and a second predicted pose associated with the mobile device, the first predicted pose corresponds with a first point in time and the second predicted pose corresponds with a second point in time subsequent to the first point in time, the one or more processors configured to acquire a rendered image, the one or more processors configured to determine a first homographic transformation based on the first predicted pose and determine a second homographic transformation based on the second predicted pose, the one or more processors configured to generate a first portion of an updated image by causing the first homographic transformation to be applied to a first portion of the rendered image and generate a second portion of the updated image by causing the second homographic transformation to be applied to a second portion of the rendered image; and

a see-through display configured to display the updated image.

2. The mobile device of claim 1, wherein:

the see-through display configured to generate the first portion of the updated image by applying a first pixel offset adjustment to the first portion of the rendered image and to generate the second portion of the updated image by applying a second pixel offset different from the first pixel offset to the second portion of the rendered image.

3. The mobile device of claim 2, wherein:

the see-through display configured to apply the first pixel offset adjustment by loading a first image associated with the first portion of the rendered image into a pixel array of the see-through display and shifting the first image while the first image is stored within the pixel array using circuitry integrated within the pixel array.

4. The mobile device of claim 2, wherein:

the see-through display configured to apply the first pixel offset adjustment by loading a first image associated with the first portion of the rendered image into a buffer of the see-through display and shifting the first image within the buffer.

5. The mobile device of claim 1, wherein:

the one or more processors configured to generate the second portion of the updated image while the first portion of the updated image is displayed using the see-through display.

6. The mobile device of claim 1, wherein:

the first homographic transformation comprises an affine transformation.

7. The mobile device of claim 1, wherein:

the mobile device comprises a head-mounted display device; and

the see-through display comprises an OLED display.

8. A method for displaying images, comprising:

determining a first predicted pose and a second predicted pose associated with a mobile device, the first predicted pose corresponds with a first point in time and the second predicted pose corresponds with a second point in time subsequent to the first point in time;

acquiring a rendered image;

determining a first homographic transformation to be applied to a first portion of the rendered image based on the first predicted pose;

determining a second homographic transformation to be applied to a second portion of the rendered image based on the second predicted pose;

generating a first portion of an updated image by applying the first homographic transformation to the first portion of the rendered image using the mobile device;

generating a second portion of the updated image by applying the second homographic transformation to the second portion of the rendered image using the mobile device; and

displaying the updated image on a display of the mobile device.

9. The method of claim 8, wherein:

the generating the first portion of the updated image includes-applying a first pixel offset adjustment to the first portion of the rendered image; and

the generating the second portion of the updated image includes applying a second pixel offset different from the first pixel offset to the second portion of the rendered image.

10. The method of claim 9, wherein:

the applying the first pixel offset adjustment includes loading a first image associated with the first portion of the rendered image into a pixel array of the display and shifting the first image while the first image is stored within the pixel array using circuitry integrated within the pixel array.

11. The method of claim 9, wherein:

the applying the first pixel offset adjustment includes loading a first image associated with the first portion of the rendered image into a buffer of the display and shifting the first image within the buffer.

12. The method of claim 8, wherein:

the generating the second portion of the updated image includes generating the second portion of the updated image while the first portion of the updated image is displayed using the display.

13. The method of claim 8, wherein:

the first homographic transformation comprises an affine transformation.

14. The method of claim 8, further comprising:

acquiring a pose history associated with the mobile device; and

determining a current pose of the mobile device prior to the determining the first predicted pose, the determining the first predicted pose includes determining the first predicted pose based on the current pose and the pose history.

15. The method of claim 14, wherein:

the pose history includes an acceleration and a velocity of the mobile device prior to determining the first predicted pose.

16. The method of claim 8, wherein:

the mobile device comprises a head-mounted display device; and

the display comprises an OLED display.

17. One or more storage devices containing processor readable code for programming one or more processors to perform a method for displaying images using an HMD comprising the steps of:

acquiring a pose history associated with the HMD, the pose history corresponds with a time period prior to a first point in time;

determining a current pose associated with the HMD corresponding with the first point in time;

determining a first predicted pose associated with the HMD corresponding with a second point in time subsequent to the first point in time, the determining a first predicted pose includes determining the first predicted pose based on the current pose and the pose history;

determining a second predicted pose associated with the HMD corresponding with a third point in time subsequent to the second point in time;

acquiring a rendered image;

determining a first homographic transformation to be applied to a first portion of the rendered image based on the first predicted pose;

determining a second homographic transformation to be applied to a second portion of the rendered image based on the second predicted pose;

generating a first portion of an updated image by applying the first homographic transformation to the first portion of the rendered image;

generating a second portion of the updated image by applying the second homographic transformation to the second portion of the rendered image; and

displaying the updated image on a display of the HMD.

18. The one or more storage devices of claim 17, wherein:

the generating the first portion of the updated image includes loading a first image associated with the first portion of the rendered image into a pixel array of the display and shifting the first image while the first image is stored within the pixel array using circuitry integrated within the pixel array.

19. The one or more storage devices of claim 17, wherein:

the generating the first portion of the updated image includes loading a first image associated with the first portion of the rendered image into a pixel array of the display and shifting the first image in both a first pixel direction and a second pixel direction orthogonal to the first pixel direction while the first image is stored within the pixel array using circuitry integrated within the pixel array.

20. The one or more storage devices of claim 17, wherein:

the generating the second portion of the updated image includes generating the second portion of the updated image while the first portion of the updated image is displayed using the display.