Color control by alteration of wavelength converting element

US7462502B2 · kind B2 · utility

Assignee

• Philips Lumileds Lighting Company LLC · US

Inventors

• Steven Paolini · Saratoga, US
• Michael D. Camras · San Jose, US
• Oscar Arturo Chao Pujol · Santa Clara, US
• Frank M. Steranka · San Jose, US
• John E. Epler · San Jose, US

Key dates

• Filing date: May 31, 2006
• Grant date: Dec 9, 2008
• Expiry date: Dec 14, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/855

Abstract

A light emitting device is produced by depositing a layer of wavelength converting material over the light emitting device, testing the device to determine the wavelength spectrum produced and correcting the wavelength converting member to produce the desired wavelength spectrum. The wavelength converting member may be corrected by reducing or increasing the amount of wavelength converting material. In one embodiment, the amount of wavelength converting material in the wavelength converting member is reduced, e.g., through laser ablation or etching, to produce the desired wavelength spectrum.