Method to generate high efficient devices which emit high quality light for illumination

US7554257B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Benjamin Claus Krummacher · Regensburg, DE
• Mathew K. Mathai · Monroeville, US
• Vi-En Choong · Tempe, US
• Stelios A. Choulis · Limassol, CY

Key dates

• Filing date: Jun 22, 2005
• Grant date: Jun 30, 2009
• Expiry date: Nov 20, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K59/38
• WIPO field: Micro-structural and nano-technology
• WIPO sector: Chemistry

Abstract

An electroluminescent apparatus includes an OLED device emitting light in the blue and green spectrums, and at least one down conversion layer. The down conversion layer absorbs at least part of the green spectrum light and emits light in at least one of the orange spectra and red spectra.