Light-emitting devices utilizing nanoparticles

US7083490B2 · kind B2 · utility

Assignee

• Philips Lumileds Lighting Company LLC · US

Inventors

• Gerd O. Mueller · San Jose, US
• Regina B. Mueller-Mach · San Jose, US
• Dietrich Bertram · Aachen, DE
• Thomas Juestel · Aachen, DE
• Peter Josef Schmidt · Aachen, DE
• Joachim Opitz · Aachen, DE

Key dates

• Filing date: Jan 11, 2005
• Grant date: Aug 1, 2006
• Expiry date: Jan 30, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882

Abstract

Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.