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US 10,852,558 B2Granted
Near-eye display (NED) system and method using flexible reflector
AssigneeFacebook Technologies, LLC
InventorsWai Sze Tiffany Lam, Ying Geng, Scott McEldowney
Life of this patent
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Abstract
A device and method are provided. The device comprises a reflector having variable optical power; and a waveguide display assembly optically coupled to the reflector and having a light source. The waveguide display assembly is configured to guide light from the light source to transmit in a first direction towards the reflector for a first optical path, and in a second direction towards an eye-box of the device for a second optical path. The reflector is configured to reflect the light in the first direction towards the eye-box.
Claims20
A device, comprising:
- a reflector having variable optical power;
- and
- a waveguide display assembly optically coupled to the reflector and including:
- a waveguide optically coupled to a light source and configured to receive a light emitted by the light source;
- a phase-modulator disposed between the waveguide and the reflector;
- and
- a polarizer disposed between the waveguide and an eye-box of the device, wherein:
- the waveguide is configured to output a first portion of the light having a first polarization toward the phase-modulator and the reflector, and output a second portion of the light having the first polarization toward the polarizer,
- the phase-modulator and the reflector are configured to receive the first portion of the light having the first polarization from the waveguide, and output the first portion of the light having a second polarization toward the waveguide and the polarizer, and
- the polarizer is configured to transmit the first portion of the light having the second polarization, and block the second portion of the light having the first polarization that is incident onto the polarizer.
7 more elements
A method, comprising:
- outputting, by a waveguide, a first portion of a light having a first polarization from a light source toward a phase-modulator and a reflector;
- outputting, by the waveguide, a second portion of the light having the first polarization toward a polarizer;
- receiving, by the phase-modulator and the reflector, the first portion of the light having the first polarization from the waveguide, and outputting the first portion of the light having a second polarization toward the waveguide and the polarizer;
- transmitting, by the polarizer, the first portion of the light having the second polarization;
- and
- blocking, by the polarizer, the second portion of the light having the first polarization that is incident onto the polarizer.
3 more elements
Dependencies are inferred from the claim text.