Phase control backlight
First Claim
1. A display device comprising:
- a backlight comprising an illuminator and a light guide, the light guide including;
a liquid crystal layer positioned within a central plane of the light guide; and
a diffraction grating, the illuminator configured to inject light rays into the light guide, and the diffraction grating configured to diffract light rays out of the light guide;
a display positioned in front of the backlight;
a sensor configured to collect viewer positional data to determine a position in space of each pupil of a viewer relative to the display; and
a controller configured to control the liquid crystal layer to cause the diffracted light rays to converge to a concentration point that corresponds to the position in space of each pupil of the viewer, the display configured to display an image to each pupil of the viewer when the diffracted light rays converge to the concentration point that corresponds to the position in space of each pupil of the viewer.
2 Assignments
0 Petitions
Accused Products
Abstract
This document describes techniques and apparatuses for implementing a phase control backlight. A phase control backlight is configured to concentrate light to each pupil of a viewer of a display to cause images to be displayed to each pupil of the viewer. The phase control backlight can include an illuminator and a light guide that includes a diffraction grating. The light guide is configured to receive light rays from the illuminator, and to diffract light rays out of the light guide via the diffraction grating. In accordance with various embodiments, the light guide can be controlled to alter a phase of the light rays as the light rays are guided within the light guide to cause the diffracted light rays to converge to a concentration point that corresponds to a position in space of each pupil of the viewer.
317 Citations
20 Claims
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1. A display device comprising:
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a backlight comprising an illuminator and a light guide, the light guide including; a liquid crystal layer positioned within a central plane of the light guide; and a diffraction grating, the illuminator configured to inject light rays into the light guide, and the diffraction grating configured to diffract light rays out of the light guide; a display positioned in front of the backlight; a sensor configured to collect viewer positional data to determine a position in space of each pupil of a viewer relative to the display; and a controller configured to control the liquid crystal layer to cause the diffracted light rays to converge to a concentration point that corresponds to the position in space of each pupil of the viewer, the display configured to display an image to each pupil of the viewer when the diffracted light rays converge to the concentration point that corresponds to the position in space of each pupil of the viewer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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receiving viewer positional data corresponding to a position in space of each pupil of a viewer of a display; controlling an illuminator to inject a light ray into a light guide that includes; a liquid crystal layer positioned within a central plane of the light guide; and a diffraction grating; and controlling the liquid crystal layer to alter a phase of the light ray within the light guide to cause light rays to diffract out of the light guide via the diffracting grating and converge to a concentration point that corresponds to the position in space of each pupil of the viewer of the display. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A backlight comprising:
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an illuminator; and a light guide comprising; a liquid crystal layer positioned within a central plane of the light guide; and a diffraction grating, the light guide configured to receive light rays from the illuminator, and to diffract the light rays out of the light guide via the diffraction grating, the liquid crystal layer configured to alter a direction of the light rays propagating in the light guide to cause the diffracted light rays to converge to a concentration point. - View Dependent Claims (17, 18, 19, 20)
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Specification