White light devices using non-polar or semipolar gallium containing materials and phosphors

US8558265B2 · kind B2 · utility

Assignee

• SORAA, INC. · US

Inventors

• James W. Raring · Lompoc, US
• Eric M. Hall · Rochester Hills, US
• Mark P. D'Evelyn · Fremont, US

Key dates

• Filing date: Jan 27, 2012
• Grant date: Oct 15, 2013
• Expiry date: Mar 11, 2032

Classification

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

Abstract

A packaged optical device includes a substrate having a surface region with light emitting diode devices fabricated on a semipolar or nonpolar GaN substrate. The LEDs emit polarized light and are characterized by an overlapped electron wave function and a hole wave function. Phosphors within the package are excited by the polarized light and, in response, emit electromagnetic radiation of a second wavelength.