Color control by alteration of wavelength converting element

US7902566B2 · kind B2 · utility

Assignees

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL
• 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: Nov 24, 2008
• Grant date: Mar 8, 2011
• Expiry date: Nov 24, 2028

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.