Luminaire with controllable light emission

US10416377B2 · kind B2 · utility

Assignee

• Cree, Inc. · US

Inventors

• Claudio Girotto · Lompoc, US
• Eric Tarsa · Goleta, US
• Nathan Snell · Raleigh, US
• James Ibbetson · Lompoc, US
• Mark Youmans · Goleta, US
• Theodore Lowes · Lompoc, US
• Bernd Keller · Lompoc, US
• Ethan Creasman · Morrisville, US
• Randall Levy Bernard · Cary, US
• William L. Dungan · Cary, US

Key dates

• Filing date: Mar 6, 2017
• Grant date: Sep 17, 2019
• Expiry date: Mar 9, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12083
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A luminaire includes a first waveguide having a first primary light emitting surface directed in a first direction and a first secondary light emitting surface directed in a second direction. A second waveguide having a second primary light emitting surface directed in the second direction and a second secondary light emitting surface directed in the first direction. A first plurality of LEDs are optically coupled to the first waveguide and a second plurality of LEDs are optically coupled to the second waveguide. The first and second waveguides are independently operable. The first and second plurality of LEDs may comprise LED groups where each of the LED groups are independently controllable. The light emission pattern and light properties of the emitted light are controllable.