Radiation emitting device

US10582585B2 · kind B2 · utility

Assignee

• Osram OLED GMBH · DE

Inventors

• Peter Brick · Regensburg, DE
• Stefan Grötsch · Regensburg, DE
• Stephan Pawlik · Regensburg, DE
• Michael Wittmann · Alteglofsheim, DE
• Uli Hiller · Bad Abbach, DE

Key dates

• Filing date: Jan 24, 2019
• Grant date: Mar 3, 2020
• Expiry date: Jan 24, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/30
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A radiation emitting device is disclosed. In an embodiment a radiation emitting device includes a pixelated optoelectronic semiconductor chip configured to emit a first radiation having a first peak wavelength, a conversion element or color control medium configured to convert at least a portion of the first radiation into a second radiation having a second peak wavelength and a color control element including a semiconductor diode configured to absorb a portion of the first and/or second radiation, wherein devise is configured to emit radiation of a first color temperature composed mainly of the first and second radiations when a reverse voltage is applied to the semiconductor diode and to emit radiation of a second color temperature composed mainly of the first and second radiations and a third radiation with a third peak wavelength generated by the absorbed first and/or second radiation in the semiconductor diode when a forward voltage is applied to the semiconductor diode.