Patent · US Active

Waveguide-based displays with exit pupil expander

US10025093B2 · kind B2 · utility

27Cited by

7References

18Claims

0Family size

Assignee

MICROSOFT TECHNOLOGY LICENSING, LLC · US

Inventors

Richard Andrew Wall · Kirkland, US
Tuomas Vallius · Espoo, FI
Mikko Juhola · Muurla, FI

Key dates

Filing date	Apr 13, 2016
Grant date	Jul 17, 2018
Priority date	—
Expiry date	May 17, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0174
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A near eye or heads up display system includes a scan beam projector engine, an optical waveguide, and an exit pupil expander (EPE) optically coupled between the scan beam projector engine and the optical waveguide. The EPE improves the optical performance of the display system. The EPE could include a diffusive optical element, diffractive optical element, micro-lens array (MLA), or relay of aspherical lenses. A dual MLA EPE may have cells that prevent cross-talk between adjacent pixels. A dual MLA EPE may have a non-periodic lens array. The optical power of one MLA may be different from the other MLA.

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