Green phosphor converted light emitting diode

US6682207B2 · kind B2 · utility

Assignee

• Lumileds Lighting US, LLC · US

Inventors

• Andreas Weber · Salzburg, AT
• Gregory M. Cutler · Cupertino, US
• William Trutna · Atherton, US
• Gerd O. Muller · Berlin, DE
• Regina Muller-Mach · Mühldorf a. Inn, DE

Key dates

• Filing date: Jun 22, 2001
• Grant date: Jan 27, 2004
• Expiry date: Oct 28, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/851
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A light emitting device comprises a light emitting diode that emits primary light and a SrGa2S4:Eu2+ phosphor material capable of absorbing at least a portion of the primary light and emitting secondary light. The secondary light includes a wavelength longer than a wavelength of the primary light.