Virtual and augmented reality systems and methods having unequal numbers of component color images distributed across depth planes

Patent metadata

Field	Value
Publication number	US-10466480-B2
Application number	US-201715399548-A
Country	US
Kind code	B2
Filing date	Jan 5, 2017
Priority date	Jan 7, 2016
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

Images perceived to be substantially full color or multi-colored may be formed using component color images that are distributed in unequal numbers across a plurality of depth planes. The distribution of component color images across the depth planes may vary based on color. In some embodiments, a display system includes a stack of waveguides that each output light of a particular color, with some colors having fewer numbers of associated waveguides than other colors. The stack of waveguides may include by multiple pluralities (e.g., first and second pluralities) of waveguides, each configured to produce an image by outputting light corresponding to a particular color. The total number of waveguides in the second plurality of waveguides is less than the total number of waveguides in the first plurality of waveguides, and may be more than the total number of waveguides in a third plurality of waveguides, in embodiments where three component colors are utilized.

First claim

What is claimed is:

1. A display system comprising:
a display configured to display image content on a plurality of depth planes by outputting a plurality of component color images, the display comprising:
a waveguide stack comprising:
a first plurality of waveguides, each of the first plurality of waveguides comprising first outcoupling optical elements configured to selectively outcouple light of a first component color, wherein each of the first plurality of waveguides is configured to output light of the first component color with a different amount of wavefront divergence than other waveguides of the first plurality of waveguides;
a second plurality of waveguides, each of the second plurality of waveguides comprising second outcoupling optical elements configured to selectively outcouple light of a second component color, wherein each of the second plurality of waveguides is configured to output light of the second component color with a different amount of wavefront divergence than other waveguides of the second plurality of waveguides; and
a third plurality of waveguides, each of the third plurality of waveguides comprising third outcoupling optical elements configured to selectively outcouple light of a third component color, wherein each of the third plurality of waveguides is configured to output light of the third component color with a different amount of wavefront divergence than other waveguides of the second plurality of waveguides,

wherein the light of the first component color comprises light having a wavelength within a first wavelength range, wherein the light of the second component color comprises light having a wavelength within a second wavelength range, and wherein the light of the third component color comprises light having a wavelength within a third wavelength range,
wherein the first plurality of waveguides totals a greater number of waveguides than the second plurality of waveguides.

2. The system of claim 1 , wherein the second plurality of waveguides totals a greater number of waveguides than the first plurality of waveguides.

3. The system of claim 1 , wherein different amounts of wavefront divergence correspond to different depth planes,
wherein a spacing between depth planes of the first plurality of waveguides is different from a spacing between depth planes of the second plurality of waveguides.

4. The system of claim 1 , wherein an exit pupil is associated with light forming each component color image, wherein exit pupil sizes vary with the color of the component color images.

5. The system of claim 1 , wherein the display is configured to output light to form the component color images, the light having an exit beam size less than 5 mm.

6. The system of claim 5 , wherein the exit beam size varies with the color of the component color image.

7. The system of claim 1 , wherein the system comprises a frame configured to be worn by a viewer, wherein the display is attached to the frame.

8. The system of claim 1 , wherein the display is configured to output two sets of component color images, one set for each eye, wherein a progression of distances between successive depth planes is different between the depth planes of each set.

9. The system of claim 1 , further comprising optical elements or an image processing module for introducing blur to the component color images.

10. The system of claim 9 , wherein the optical elements or image processing module are configured to introduce different amounts of blur to component color images of different colors.

11. The system of claim 1 , wherein a first pixel size for the component first color images are different than a second pixel size for the component second color images.

12. The system of claim 11 , further comprising component third color images, wherein a third pixel size for the component third color images is different than the first or second pixel sizes.

13. The system of claim 11 , wherein the component color images comprise more than three colors.

14. The system of claim 1 , further comprising a controller configured to distribute, between two neighboring depth planes, the luminance of a point between the neighboring depth planes.

15. The system of claim 1 , wherein the display is configured to output two sets of component color images, one set for each eye, wherein a total number of depth planes is different between the depth planes of each set.

16. The system of claim 1 , wherein the display is configured to output two sets of component color images, one set for each eye, wherein focal distances for corresponding depth planes is different between the depth planes of each set.

17. The system of claim 1 , wherein the display comprises optical elements configured to output light with set amounts of wavefront divergence, wherein each set amount of wavefront divergence corresponds to one of the plurality of depth planes.

Assignees

• Magic Leap Inc

Inventors

• Schowengerdt Brian T
• Hua Hong
• Cheng Hui-Chuan
• Peroz Christophe

Classifications

• G02B5/18 Primary

  Diffraction gratings {(holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44)} · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B2027/0132

  comprising binocular systems · CPC title

• G02B6/0076

  Stacked arrangements of multiple light guides of the same or different cross-sectional area · CPC title

• G02B2027/0125

  Field-of-view increase by wavefront division · CPC title