US 2025/0093657 A1 · Diffractive Waveguide Combiners with Compensated-Wrap for Rainbow Mitigation

Abstract

Embodiments herein are generally directed to a waveguide display assembly and a near-eye display system incorporating the waveguide display assembly. In an embodiment, the waveguide display includes a light engine, a waveguide combiner, an input coupling grating, and one or more coupling gratings exposed to an ambient environment of the waveguide display assembly. The waveguide combiner extends across a user's eye at a wrap angle θwrap(xy) relative to a waveguide plane, and the light engine is configured to project light toward the input coupling grating at a compensation angle θCl so as to increase the grating vector of the exposed gratings and reduce the angles and wavelengths at which light can be diffracted and coupled by the exposed grating into the waveguide combiner to the user's eye.

Claims20

Dependent claims

A waveguide display assembly, comprising:

a light engine to project light;
a waveguide combiner configured to extend across a user's eye at a wrap angle θwrap(xy) relative to a waveguide plane;
an input coupling grating for coupling light from the light engine into the waveguide combiner;
and
one or more coupling gratings exposed to an ambient environment of the waveguide display assembly, wherein the waveguide plane is substantially parallel with an eyebox plane in front of the user's eye, and the light engine is configured to project light toward the input coupling grating at a compensation angle θCl determined using the wrap angle θwrap(xy) and following equation:
θ
CI
=
90
⁢
°
-
(
2
×
θ
wrap
⁡
(
xy
)
)
.

20 more elements

A near-eye display system, comprising:

a frame,
a light engine to project light;
and
a waveguide display comprising:
a waveguide combiner configured to extend across a user's eye at a wrap angle θwrap(xy) relative to a waveguide plane;
an input coupling grating for coupling light from the light engine into the waveguide combiner;
and
one or more coupling gratings formed on or in a surface of the waveguide combiner and exposed to an ambient environment of the waveguide display assembly,
wherein the waveguide plane is substantially parallel with an eyebox plane in front of the user's eye, and the light engine is configured to project light toward the input coupling grating at a compensation angle θCl determined using the wrap angle θwrap(xy) and following equation:
θ
CI
=
90
⁢
°
-
(
2
×
θ
wrap
⁡
(
xy
)
)
.

24 more elements

Dependencies are inferred from the claim text.

Diffractive Waveguide Combiners with Compensated-Wrap for Rainbow Mitigation

Life of this patent

Diffractive Waveguide Combiners with Compensated-Wrap for Rainbow Mitigation

Life of this patent

Abstract

Claims20