Light emitting devices with improved light extraction efficiency

US8049234B2 · kind B2 · utility

Assignee

• Philips Lumileds Lighting Company LLC · US

Inventors

• Michael D. Camras · San Jose, US
• Michael R. Krames · Los Altos, US
• Wayne L. Snyder · Palo Alto, US
• Frank M. Steranka · San Jose, US
• Robert C. Taber · Palo Alto, US
• John Uebbing · Palo Alto, US
• Douglas W. Pocius · Fremont, US
• Troy Trottier · San Jose, US
• Christopher H. Lowery · Chester, US
• Gerd O. Mueller · San Jose, US
• Regina B. Mueller-Mach · San Jose, US
• Gloria Hofler · Sunnyvale, US

Key dates

• Filing date: Oct 8, 2007
• Grant date: Nov 1, 2011
• Expiry date: Feb 3, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/819

Abstract

Light emitting devices with improved light extraction efficiency are provided. The light emitting devices have a stack of layers including semiconductor layers comprising an active region. The stack is bonded to a transparent optical element.