US 12,591,145 B2 · Achromatic beam deflector for light-efficient display panel

Abstract

A device includes an array of light sources configured to emit light beams, and a metasurface including a plurality of nanostructures and configured to receive and deflect the light beams emitted by the array of light sources. The metasurface includes a plurality of regions. Nanostructures in different regions of the plurality of regions are configured to deflect center light rays (with peak intensity) of the light beams into different directions towards a target, such as display optics of a near-eye display. In some embodiments, nanostructures in each region of the plurality of regions are configured to deflect center light rays of light beams of two or more different colors into a same direction or similar directions towards the target.

Claims20

Dependent claims

A device comprising:

an array of light sources configured to emit light;
and
a metasurface including a plurality of nanostructures and configured to receive and deflect the light emitted by the array of light sources, wherein:
the metasurface includes a plurality of regions, and each light source in the array of light sources corresponds to different regions of the plurality of regions;
the array of light sources include a variable pitch that is smaller at a center of the array of light sources and larger toward a periphery of the array of light sources;
and
nanostructures in the different regions of the plurality of regions are configured to deflect normally incident light from each light source corresponding to the different regions of the plurality of regions into different directions towards an eyebox.

4 more elements

A near-eye display comprising:

an array of light sources configured to emit light beams;
display optics configured to collect and project the light beams emitted by the array of light sources towards an eyebox of the near-eye display;
and
a metasurface between the array of light sources and the display optics, the metasurface including a plurality of nanostructures and configured to receive and deflect the light beams emitted by the array of light sources towards the display optics, wherein:
the metasurface includes a plurality of regions, and each light source in the array of light sources corresponds to different regions of the plurality of regions;
the array of light sources include a variable pitch that is smaller at a center of the array of light sources and larger toward a periphery of the array of light sources;
and
nanostructures in the different regions of the plurality of regions are configured to deflect center light rays of the light beams from each light source corresponding to the different regions of the plurality of regions into different directions towards the display optics.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/948,887Filed 20 Sep 2022 · us provisional application

Priority

29 Sep 2021

Published

US 2023/0101633 A130 Mar 2023

Granted

31 Mar 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G02B 27/4227
Having a diffractive optical element [DOE] contributing to image formation, e.g. whereby modulation transfer function MTF or optical aberrations…:…
G02B 1/002
Optical elements characterised by the material of which they are made; Optical coatings for optical elements: made of materials engineered to…
G02B 5/1809
Diffraction gratings: with pitch less than or comparable to the wavelength
G02B 5/1828
Diffraction gratings: having means for producing variable diffraction

Achromatic beam deflector for light-efficient display panel

Life of this patent

Achromatic beam deflector for light-efficient display panel

Life of this patent

Abstract

Claims20