Wide field-of-view virtual image projector
First Claim
1. A method comprising:
- receiving data corresponding to a virtual image;
controlling an illuminator to inject first light rays into a first diffraction grating of a rod light guide effective to diffract the first light rays out of the rod light guide at a first range of angles and into a slab light guide; and
controlling the illuminator to inject second light rays into a second diffraction grating of the rod light guide effective to diffract the second light rays out of the rod light guide at a second range of angles and into the slab light guide, the first diffraction grating substantially parallel to the second diffraction grating on a first surface of the rod light guide, the first diffraction grating having a first spatial frequency that is different than a second spatial frequency of the second diffraction grating, the first spatial frequency causing the first diffraction grating to project the first diffracted light rays at the first range of angles, and the second spatial frequency causing the second diffraction grating to project the second diffracted light rays at the second range of angles, and the slab light guide configured to generate the virtual image.
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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.
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Citations
20 Claims
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1. A method comprising:
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receiving data corresponding to a virtual image; controlling an illuminator to inject first light rays into a first diffraction grating of a rod light guide effective to diffract the first light rays out of the rod light guide at a first range of angles and into a slab light guide; and controlling the illuminator to inject second light rays into a second diffraction grating of the rod light guide effective to diffract the second light rays out of the rod light guide at a second range of angles and into the slab light guide, the first diffraction grating substantially parallel to the second diffraction grating on a first surface of the rod light guide, the first diffraction grating having a first spatial frequency that is different than a second spatial frequency of the second diffraction grating, the first spatial frequency causing the first diffraction grating to project the first diffracted light rays at the first range of angles, and the second spatial frequency causing the second diffraction grating to project the second diffracted light rays at the second range of angles, and the slab light guide configured to generate the virtual image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. One or more computer-readable storage media comprising instructions stored thereon that, responsive to execution by one or more processors, perform operations comprising:
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receiving data corresponding to a virtual image; controlling an illuminator to inject first light rays into a first diffraction grating of a rod light guide effective to diffract the first light rays out of the rod light guide at a first range of angles and into a slab light guide; controlling the illuminator to inject second light rays into a second diffraction grating of the rod light guide effective to diffract the second light rays out of the rod light guide at a second range of angles and into the slab light guide, the first diffraction grating substantially parallel to the second diffraction grating on a first surface of the rod light guide, the first diffraction grating having a first spatial frequency that is different than a second spatial frequency of the second diffraction grating, the first spatial frequency causing the first diffraction grating to project the first diffracted light rays at the first range of angles, and the second spatial frequency causing the second diffraction grating to project the second diffracted light rays at the second range of angles, and the slab light guide configured to generate the virtual image. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification