Virtual/augmented reality system having reverse angle diffraction grating

US10935792B2 · kind B2 · utility

Assignee

• Magic Leap, Inc. · US

Inventors

• Ivan Li Chuen Yeoh · Tampa, US
• Hui-Chuan Cheng · Pembroke Pines, US
• Lionel Ernest Edwin · Hollywood, US
• David Tinch · Fort Lauderdale, US
• William Hudson Welch · Fort Lauderdale, US

Key dates

• Filing date: Apr 23, 2019
• Grant date: Mar 2, 2021
• Expiry date: Apr 23, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F3/013
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A display subsystem for a virtual image generation system comprises a planar waveguide apparatus, an optical fiber, at least one light source configured for emitting light from a distal end of the optical fiber, and a mechanical drive assembly to which the optical fiber is mounted as a fixed-free flexible cantilever. The drive assembly is configured for displacing a distal end of the optical fiber about a fulcrum in accordance with a scan pattern, such that the emitted light diverges from a longitudinal axis coincident with the fulcrum. The display subsystem further comprises an optical modulation apparatus configured for converging the light from the optical fiber towards the longitudinal axis, and an optical waveguide input apparatus configured for directing the light from the optical modulation apparatus down the planar waveguide apparatus, such that the planar waveguide apparatus displays one or more image frames to an end user.