Virtual and augmented reality systems and methods

Patent metadata

Field	Value
Publication number	US-9791700-B2
Application number	US-201414555585-A
Country	US
Kind code	B2
Filing date	Nov 27, 2014
Priority date	Nov 27, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

Configurations are disclosed for presenting virtual reality and augmented reality experiences to users. The system may comprise an image-generating source to provide one or more frames of image data in a time-sequential manner, a light modulator configured to transmit light associated with the one or more frames of image data, a substrate to direct image information to a user's eye, wherein the substrate houses a plurality of reflectors, a first reflector of the plurality of reflectors to reflect transmitted light associated with a first frame of image data at a first angle to the user's eye, and a second reflector to reflect transmitted light associated with a second frame of the image data at a second angle to the user's eye.

First claim

What is claimed is:

1. A system for displaying virtual content, the system comprising:
an image-generating source device that oscillates or vibrates to transmit one or more frames of image data in a time-sequential manner;
a light modulator configured to transmit light associated with the one or more frames of the image data;
a substrate comprising a plurality of substrate subsections to direct the light that comprises curved wavefronts from the light modulator to a user's eye by using at least a plurality of reflectors housed in the substrate to render the image information in focus in the user's eye;
a first reflector of the plurality of reflectors to reflect transmitted light associated with a first frame of the image data at a first angle to the user's eye; and
a second reflector to reflect transmitted light associated with a second frame of the image data at a second angle to the user's eye, wherein
each reflector of the plurality of reflectors has a selectively variable angle of reflection, and
each reflector is configured such that a refractive index of the each reflector is varied in an analog manner based in part or in whole upon a total number of sub-frames in the first frame or the second frame as well as a refresh rate at which the one or more frames are presented to the user's eye.

2. The system of claim 1 , wherein the plurality of reflectors are switchable.

3. The system of claim 1 , wherein the plurality of reflectors are electro-optically active.

4. The system of claim 1 , wherein the refractive index is varied to match a corresponding refractive index of the substrate.

5. The system of claim 1 , further comprising:
a high-frequency gating layer configurable to be placed in between the substrate and the user's eye, the high-frequency gating layer having an aperture that is controllably movable.

6. The system of claim 5 , wherein the aperture of the high-frequency gating layer is moved in a manner such that the image data is selectively transmitted only through the light that is reflected through the aperture, and one or more reflectors housed in the substrate are blocked by the high-frequency gating layer.

7. The system of claim 5 , wherein the aperture comprises an LCD (liquid crystal display) aperture.

8. The system of claim 5 , wherein the aperture comprises a micro-electro-mechanical systems (MEMS) array.

9. The system of claim 1 , wherein the first angle is identical to the second angle.

10. The system of claim 1 , wherein the first angle is different from the second angle.

11. The system of claim 1 , further comprising a first lens to steer a set of light rays through a nodal point and to the user's eye, wherein the first lens is configurable to be placed on the substrate and in front of the first reflector such that the set of light rays exiting the first reflector passes through the first lens before reaching the user's eye.

12. The system of claim 11 , further comprising a second lens to compensate for the first lens, the second lens configurable to be placed on the substrate and on a side opposite to another side on which the first lens is placed, thereby resulting in zero magnification.

13. The system of claim 1 , wherein the first reflector of the plurality of reflectors comprises a curved reflective surface to collect a set of light rays associated with the image data into a single output point before being delivered to the user's eye.

14. The system of claim 13 , wherein the curved reflector comprises a parabolic reflector.

15. The system of claim 13 , wherein the curved reflector comprises an elliptical reflector.

16. A method for displaying virtual content to a user, the method comprising:
providing one or more light patterns associated with one or more frames of image data in a time-sequential manner from an image-generating source that oscillates or vibrates to a substrate that comprises a plurality of substrate subsections;
modulating the one or more light patterns into one or more modulated light patterns that comprise curved wavefronts via a light modulator;
reflecting the one or more modulated light patterns associated with the one or more frames of image data via a substrate to an exit pupil by using at least a plurality of reflectors housed in the substrate to variably direct light toward the exit pupil and to render the one or more frames in focus in a user's eye;
selectively varying an angle of reflection of a reflector of the plurality of reflectors; and
selectively varying a refractive index of the reflector in an analog manner based in part or in whole upon a total number of sub-frames in the first frame or the second frame as well as a refresh rate at which the one or more frames are presented to the user's eye.

17. The method of claim 16 , wherein the plurality of reflectors are switchable.

18. The method of claim 16 , wherein the plurality of reflectors are electro-optically active.

19. The method of claim 16 , wherein the refractive index is varied to match a corresponding refractive index of the substrate.

20. The method of claim 16 , further comprising:
placing a high-frequency gating layer in between the substrate and the user's eye, the high-frequency gating layer having an aperture that is controllably movable.

21. The method of claim 20 , wherein the aperture of the high-frequency gating layer is moved in a manner such that the image data is selectively transmitted only through light that is reflected through the aperture, and one or more reflectors housed in the substrate are blocked by the high-frequency gating layer.

22. The method of claim 20 , wherein the aperture comprises an LCD (liquid crystal display) aperture.

23. The method of claim 20 , wherein the aperture comprises a micro-electro-mechanical systems (MEMS) array.

24. The method of claim 16 , further comprising
steering, through a first lens, a set of light rays exiting the substrate through a nodal point and to the user's eye, wherein the first lens is configurable to be placed in between the substrate and the user's eye.

25. The method of claim 24 , further comprising
compensating an effect of the first lens through a second lens, the second lens configurable to be placed on the substrate and on a side opposite to another side on which the first lens is placed, the second lens resulting in zero magnification of light from an outside environment.

26. The method of claim 16 , wherein the reflector of the plurality of reflectors comprises a curved reflective surface to collect a set of light rays associated with the image data into a single output point before being delivered to the user's eye.

27. The method of claim 26 , wherein the reflector comprises a parabolic reflector.

28. The method of claim 26 , wherein the reflector comprises an elliptical reflector.

29. The method of claim 16 , wherein the plurality of reflectors housed in the substrate relay a wavefront to the user's eye.

30. The method of claim 29 , wherein the wavefront comprises a collimated wavefront.

31. The method of claim 29 , wherein the wavefront comprises a curved wavefront.

32. The method of claim 30 , wherein the collimated wavefront is perceived as coming from an infinite depth plane by the user's eye.

33. The method of claim 31 , wherein the curv

Assignees

• Magic Leap Inc

Inventors

• Schowengerdt Brian T

Classifications

• G02B30/24

  involving temporal multiplexing, e.g. using sequentially activated left and right shutters · CPC title

• G02B6/40

  having fibre bundle mating means · CPC title

• G06T13/40

  of characters, e.g. humans, animals or virtual beings · CPC title

• G02F1/17

  based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 · CPC title

• H04N13/361

  Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background · CPC title