US 12,517,365 B2 · Display for augmented reality or virtual reality

Abstract

An AR or VR display device. First and third input gratings receive light of a first color from first and second projectors, respectively, coupling the light into a first waveguide. Second and fourth input gratings receive light of a second color from the first and second projectors, respectively, coupling the light into a second waveguide. An output diffractive optical element couples light out of the waveguides towards a viewing position. The first and second projectors provide light to the input diffractive optical elements in directions that are at a first and second angle, respectively, to a waveguide normal vector. The output diffractive optical element couples light out of the waveguides in a first range of angles for light from the first projector and in a second range of angles for light from the second projector, the first range of angles and the second range of angles differing but partially overlapping.

Claims20

Dependent claims

A device, comprising:

a waveguide assembly, comprising at least one waveguide;
a first input diffractive optical element positioned in or on the waveguide assembly to receive light from a first direction that is at a first angle to a waveguide normal vector and to couple the light into the at least one waveguide;
a second input diffractive optical element positioned in or on the waveguide assembly to receive light from a second direction that is at a second angle to the waveguide normal vector and to couple the light into the at least one waveguide;
and
an output diffractive optical element positioned in or on the waveguide assembly to couple light out of the at least one waveguide towards a notional viewing position;
wherein the output diffractive optical element is configured to couple light out of the at least one waveguide in a first range of angles for light from the first direction and in a second range of angles for light from the second direction, wherein the first range of angles and the second range of angles are different;
and
wherein the first and second angles are angled respectively away from the output diffractive optical element.

5 more elements

A method for projecting light via an augmented reality or virtual reality display device, comprising:

receiving light from a first direction;
directing the light received from the first direction toward a first input diffractive optical element positioned in or on at least one waveguide in a direction that is at a first angle to a waveguide normal vector;
coupling the light received from the first direction into at the least one waveguide;
receiving light from a second direction;
directing the light received from the second direction toward a second input diffractive optical element positioned in or on the at least one waveguide in a direction that is at a second angle to the waveguide normal vector;
coupling the light received from the second direction into the at least one waveguide;
and
coupling light out of the at least one waveguide towards a notional viewing position via an output diffractive optical element positioned in or on the at least one waveguide;
wherein the output diffractive optical element is configured to couple light out of the at least one waveguide in a first range of angles for light received from the first direction and in a second range of angles for light received from the second direction;
and
wherein the first and second angles are angled respectively away from the output diffractive optical element.

8 more elements

Dependencies are inferred from the claim text.

Display for augmented reality or virtual reality

Life of this patent

Display for augmented reality or virtual reality

Life of this patent

Abstract

Claims20