Light emitting device with a non-activated luminescent material

US7855393B2 · kind B2 · utility

Assignee

• TRIDONIC OPTOELECTRONICS GMBH · AT

Inventors

• Sven Rösler · Eisenach, DE
• Sylke Rösler · Eisenach, DE
• Wolfgang Kempfert · Bad Liebenstein, DE
• Detlef Starick · Berlin, DE
• Peter Pachler · Graz, AT
• Stefan Tasch · Fehring, AT
• Paul R. Hartmann · Escondido, US
• Hans Hoschopf · Fehring, AT

Key dates

• Filing date: Jan 8, 2007
• Grant date: Dec 21, 2010
• Expiry date: Jan 8, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a light emitting device having a radiation emitting element, for example a light emitting diode, and a luminescent material which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material. The diffusing particles are of non-activated luminescent material, through which production is simplified.