Waveguide concentrator for light source

US11493760B2 · kind B2 · utility

Assignee

• Meta Platforms Technologies, LLC · US

Inventors

• Daniel Guenther Grief · Redmond, US
• Scott Charles McEldowney · Redmond, US
• Stephen John Holmes · Redmond, US
• Chadwick Brian Martin · Kirkland, US
• Stephen James McNally · Camas, US
• John Michael Goward · Ayr, GB

Key dates

• Filing date: May 2, 2019
• Grant date: Nov 8, 2022
• Expiry date: Apr 27, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L25/0753
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A light source or projector for a near-eye display includes a light source subassembly optically coupled to a waveguide concentrator. The light source subassembly may include several semiconductor chips each hosting an array of emitters such s superluminescent light-emitting diodes. The semiconductor chips may be disposed side-by-side, with their emitting sides or facets coupled to the waveguide concentrator, which provides a tight array of output light ports on a common output plane of the concentrator. The output diverging beams at the array of output light ports are coupled to a collimator, which collimates the beams and couples them to an angular scanner for scanning the collimated light beams together across the field of view of the display.