Micro-LED design for chief ray walk-off compensation

US11309464B2 · kind B2 · utility

Assignee

• Facebook Technologies, LLC · US

Inventors

• Stephan Lutgen · Regensburg, DE
• Francois Olivier · Cork, IE
• Vasily Zabelin · Suwon-si, KR
• William Henry · Cork, IE
• Markus Broell · Cork, IE
• Thomas Lauermann · Heilbronn, DE
• David Massoubre · Cork, IE
• Daniel Bryce Thompson · Walnut Creek, US
• Michael Jason Grundmann · San Jose, US

Key dates

• Filing date: Apr 3, 2020
• Grant date: Apr 19, 2022
• Expiry date: Jun 16, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0112
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Techniques disclosed herein relate to micro light emitting diodes (micro-LEDs) for a display system. A display system includes an array of micro light emitting diodes (micro-LEDs), an array of output couplers optically coupled to the array of micro-LEDs and configured to extract light emitted by respective micro-LEDs in the array of micro-LEDs, a waveguide display, and display optics configured to couple the light emitted by the array of micro-LEDs and extracted by the array of output couplers into the waveguide display. Each output coupler in the array of output couplers is configured to direct a chief ray of the light emitted by a respective micro-LED in the array of micro-LEDs to a different respective direction.