Display with pre-incoupling diffractive element
AssigneeGoogle Inc.
InventorThomas Hoekman
Life of this patent
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Abstract
The present disclosure provides a diffractive element between a light engine and a waveguide and a corresponding incoupler architecture for eyewear displays. The eyewear display includes a light engine to project light associated with displaying an image; a waveguide including a plurality of incouplers; and a diffractive element between the light engine and the waveguide to receive the light projected by the light engine, split the light into a plurality of diffraction orders of light, and direct one diffraction order of light of the plurality of diffraction orders of light to one incoupler of the plurality of incouplers.
Claims23
An eyewear display comprising:
- a light engine to project light associated with displaying an image;
- a waveguide comprising a plurality of incouplers;
- and
- a diffractive element between the light engine and the waveguide to receive the light projected by the light engine, split the light into a plurality of diffraction orders of light, and direct one diffraction order of light of the plurality of diffraction orders of light to one incoupler of the plurality of incouplers.
A method to direct light in an eyewear display, the method comprising:
- projecting, from a light engine, light associated with displaying an image;
- receiving, at a diffractive element, the light and splitting it into a plurality of diffraction orders of light;
- and
- incoupling, at each of a plurality of incouplers on a waveguide, a corresponding diffraction order of light of the plurality of diffraction orders of light such that it is propagated along with waveguide by total internal reflection (TIR).
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Dependencies are inferred from the claim text.