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US 11,347,185 B2Granted
Displaying three-dimensional objects
AssigneePacific Light & Hologram, Inc.
InventorsKamran Qaderi, Stephen John Hart, Robert Alan Hess, Jonathan Seamus Blackley
Life of this patent
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Abstract
Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, a system includes a display having a plurality of display elements and an optical device configured to diffract a plurality of different colors of light to the display. The optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors.
Claims27
A system comprising:
- a display comprising a plurality of display elements;
- an optical device configured to diffract a plurality of different colors of light to the display, wherein the optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors;
- an illuminator arranged adjacent to the optical device and configured to provide the plurality of different colors of light to the optical device, wherein the illuminator comprises a plurality of light emitting elements each configured to emit a corresponding color of light;
- a prism element between the illuminator and the optical device and configured to receive the plurality of different colors of light from an input surface of the prism element;
- one or more expansion gratings adjacent an exit surface of the prism element, each of the one or more expansion gratings configured to expand a beam profile of a different corresponding color of light by a factor in at least one dimension;
- and
- one or more reflectors downstream of the one or more expansion gratings, each of the one or more reflectors being configured to reflect a respective color of light into the optical device, wherein a tilt angle of each of the one or more reflectors is independently adjustable to cause a uniformity of diffraction from the optical device to the display.
4 more elements
A system comprising:
- an illuminator configured to provide a plurality of different colors of light, wherein the illuminator comprises a plurality of light emitting elements each configured to emit a corresponding color of light;
- and
- an optical device arranged adjacent to the illuminator and configured to receive the plurality of different colors of light from the illuminator and diffract the plurality of different colors of light, wherein the optical device is configured such that, when the plurality of different colors of light is incident on the optical device, the optical device separates light of individual colors of the different colors while suppressing crosstalk between the different colors;
- a prism element between the illuminator and the optical device and configured to receive the plurality of different colors of light from an input surface of the prism element;
- one or more expansion gratings adjacent an exit surface of the prism element, each of the one or more expansion gratings configured to expand a beam profile of a different corresponding color of light by a factor in at least one dimension;
- and
- one or more reflectors downstream of the one or more expansion gratings, each of the one or more reflectors being configured to reflect a respective color of light into the optical device, wherein a tilt angle of each of the one or more reflectors is independently adjustable to cause a uniformity of diffraction from the optical device.
4 more elements
A system comprising:
- a display comprising a plurality of display elements;
- an optical device arranged adjacent to the display and configured to diffract a plurality of different colors of light to the display;
- an illuminator arranged adjacent to the optical device and configured to provide the plurality of different colors of light to the optical device, wherein the illuminator comprises a plurality of light emitting elements each configured to emit a corresponding color of light;
- a prism element between the illuminator and the optical device and configured to receive the plurality of different colors of light from an input surface of the prism element;
- one or more expansion gratings adjacent an exit surface of the prism element, each of the one or more expansion gratings configured to expand a beam profile of a different corresponding color of light by a factor in at least one dimension;
- one or more reflectors downstream of the one or more expansion gratings, each of the one or more reflectors being configured to reflect a respective color of light into the optical device, wherein a tilt angle of each of the one or more reflectors is independently adjustable to cause a uniformity of diffraction from the optical device to the display;
- and
- a controller coupled to the display and configured to:
- obtain graphic data comprising respective primitive data for a plurality of primitives corresponding to an object in a three-dimensional space;
- determine, for each of the plurality of primitives, an electromagnetic (EM) field contribution to each of the plurality of display elements of the display by calculating, in a three-dimensional coordinate system, an EM field propagation from the primitive to the display element;
- generate, for each of the plurality of display elements, a sum of the EM field contributions from the plurality of primitives to the display element;
- and
- transmit, for each of the plurality of display elements, a respective control signal based on the sum of the EM field contributions to the display element for modulation of at least one property of the display element.
10 more elements
Dependencies are inferred from the claim text.