Wide field-of-view virtual image projector
First Claim
1. A virtual image projector comprising:
- a rod light guide embossed with at least a first diffraction grating and a second diffraction grating that is substantially parallel to the first diffraction grating on a first surface of the rod light guide, the first diffraction grating configured to receive first light rays from an illuminator and to project first diffracted light rays from the rod light guide at a first range of angles, and the second diffraction grating configured to receive second light rays from the illuminator and to project second diffracted light rays from the rod light guide at a second range of angles; and
a slab light guide configured to receive the first diffracted light rays and the second diffracted light rays, and to project the first diffracted light rays and the second diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of-view.
2 Assignments
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Accused Products
Abstract
A wide field-of-view virtual image projector includes a rod light guide that is embossed with at least a first diffraction grating and a second diffraction grating that is substantially parallel to the first diffraction grating. The first diffraction grating is configured to receive a first light ray, and to project first diffracted light rays from the rod light guide at a first range of angles. The second diffraction grating is configured to receive a second light ray, and to project second diffracted light rays from the rod light guide at a second range of angles. The virtual image projector further includes a slab light guide configured to receive the first diffracted light rays and the second diffracted light rays, and to diffract the first diffracted light rays and the second diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of view.
369 Citations
20 Claims
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1. A virtual image projector comprising:
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a rod light guide embossed with at least a first diffraction grating and a second diffraction grating that is substantially parallel to the first diffraction grating on a first surface of the rod light guide, the first diffraction grating configured to receive first light rays from an illuminator and to project first diffracted light rays from the rod light guide at a first range of angles, and the second diffraction grating configured to receive second light rays from the illuminator and to project second diffracted light rays from the rod light guide at a second range of angles; and a slab light guide configured to receive the first diffracted light rays and the second diffracted light rays, and to project the first diffracted light rays and the second diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of-view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A head-mounted display device comprising:
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an illuminator configured to inject light rays into a rod light guide embossed with at least four substantially parallel diffraction gratings, each of the four substantially parallel diffraction gratings having different spatial frequencies; the rod light guide configured to receive the light rays from the illuminator, and the different spatial frequencies configured to diffract the light rays out of the four substantially parallel diffraction gratings at a wide range of angles, the wide range of angles equal to the sum of a range of angles of each of the four substantially parallel diffraction gratings; and a slab light guide positioned proximate the rod light guide, the slab light guide embossed with diffraction gratings that are substantially perpendicular to the four substantially parallel diffraction gratings, the slab light guide configured to receive diffracted light rays from the rod light guide, and to project the diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of-view. - View Dependent Claims (14, 15, 16, 17)
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18. A head-mounted display device comprising:
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an illuminator configured to inject light rays into a rod light guide embossed with at least two substantially parallel diffraction gratings positioned on a first surface of the rod light guide; the rod light guide configured to receive the light rays from the illuminator, and the at least two substantially parallel diffraction gratings configured to diffract the light rays out of the at least two substantially parallel diffraction gratings at a wide range of angles; and a slab light guide configured to receive the diffracted light rays from the rod light guide, and to project the diffracted light rays out of the slab light guide to generate a virtual image with a wide field-of-view. - View Dependent Claims (19, 20)
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Specification