Tiled waveguide display with a wide field-of-view
AssigneeMeta Platforms Technologies, LLC
InventorPasi Saarikko
Life of this patent
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Abstract
A waveguide display includes light sources, a source waveguide, an output waveguide, and a controller. Light from each of the light sources is coupled into the source waveguide. The source waveguide includes gratings with a constant period determined based on the conditions for total internal reflection and first order diffraction of the received image light. The emitted image light is coupled into the output waveguide at several entrance locations. The output waveguide outputs expanded image lights at a location offset from the entrance location, and the location/direction of the emitted expanded image light is based in part on the orientation of the light sources. Each of the expanded image light is associated with a field of view of the expanded image light emitted by the output waveguide.
Claims14
A source waveguide assembly comprising:
- a waveguide body;
- a first entrance area configured to in-couple a first image light corresponding to a first portion of an image from a first light source into the waveguide body;
- a second entrance area configured to in-couple a second image light corresponding to a second portion of the image from a second light source into the waveguide body, the second portion of the image different than the first portion of the image;
- a first exit area configured to output expanded first image light, the expanded first image light being the first image light expanded along two opposite directions;
- and
- a second exit area configured to output expanded second image light, the expanded second image light being the second image light expanded along the two opposite directions.
A method comprising:
- in-coupling, at a first entrance area, a first image light corresponding to a first portion of an image from a first light source into a waveguide body;
- in-coupling, at a second entrance area, a second image light corresponding to a second portion of the image from a second light source into the waveguide body, the second portion of the image different than the first portion of the image;
- expanding the first image light along two opposite directions;
- expanding the second image light along two opposite directions;
- outputting, at a first exit area, the expanded first image light;
- and
- outputting, at a second exit area, the expanded second image light.
Dependencies are inferred from the claim text.