Patent · US Active

Opposed gratings in a waveguide display

US10444510B1 · kind B1 · utility

37Cited by
0References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 2, 2017
Grant dateOct 15, 2019
Priority date—
Expiry dateAug 2, 2037

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B2027/0178
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A waveguide display includes a light source assembly, an output waveguide, and a controller. The light source assembly emits an image light that propagates along an input wave vector. The output waveguide includes a waveguide body with two opposite surfaces. The output waveguide includes a first grating receiving an image light propagating along the input wave vector, a second grating, and a third grating positioned opposite to the second grating and outputting an expanded image light with wave vectors matching the input wave vector. The controller controls the illumination of the light source assembly to form a two-dimensional image.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.