Virtual image device
AssigneeMicrosoft Technology Licensing, LLC
InventorsAdrian Travis, Jaron Z. Lanier, Joel S. Kollin
Life of this patent
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Abstract
This document describes various apparatuses embodying, and techniques for implementing, a virtual image device. The virtual image device includes a projector and a lens configured to generate a virtual image as well as two diffraction gratings, substantially orthogonally-oriented to each other, that act to increase a field-of-view of the virtual image. The virtual image device can be implemented as a pair of eyeglasses and controlled to generate the virtual image in front of lenses of the eyeglasses so that a wearer of the eyeglasses, looking through the lenses of the eyeglasses, sees the virtual image.
Claims20
A virtual image device comprising:
- a projector configured to output light rays;
- a lens configured to receive the light rays from the projector and to generate a virtual image;
- and two diffraction gratings, positioned proximate the lens, to increase a field-of-view of the virtual image, the two diffraction gratings substantially orthogonally-oriented to each other, a first diffraction grating of the two diffraction gratings configured to increase a vertical field-of-view of the virtual image and a second diffraction grating of the two diffraction gratings configured to increase a horizontal field-of-view of the virtual image.
A head-mounted display device comprising:
- a pupil tracker configured to locate a position of a first pupil and a position of a second pupil of a wearer of the head-mounted display device;
- a first projector configured to inject light rays into a first wedge light guide effective to generate a first virtual image based on the position of the first pupil;
- a second projector configured to inject light rays corresponding to the virtual image into a second wedge light guide effective to generate a second virtual image based on the position of the second pupil;
- two liquid crystal diffraction gratings, substantially orthogonally-oriented to each other, comprising:
- a horizontal liquid crystal diffraction grating configured to increase a vertical field-of-view of the first virtual image and the second virtual image;
- and
- a vertical liquid crystal diffraction grating configured to increase a horizontal field-of-view of the first virtual image and the second virtual image.
A virtual image device comprising:
- a pupil tracker configured to locate positions of pupils of a viewer;
- a projector configured to output light rays;
- a lens configured to receive the light rays from the projector and to generate a virtual image based on the position of the pupils of the viewer;
- and
- two diffraction gratings, positioned proximate the lens, to increase a field-of-view of the virtual image, the two diffraction gratings substantially orthogonally-oriented to each other.
Dependencies are inferred from the claim text.