Light-emitting component and method of operating a light-emitting component

US11391440B2 · kind B2 · utility

Assignee

• Osram OLED GMBH · DE

Inventors

• Hubert Halbritter · Dietfurt, DE
• Thomas Schwarz · Rhede, DE

Key dates

• Filing date: Sep 11, 2019
• Grant date: Jul 19, 2022
• Expiry date: Sep 11, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2300/023
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Light-emitting component includes a light source and a dimming element arranged downstream of the light source in a radiation direction. The dimming element includes a dimming layer. The light source includes at least one emitter which is configured to emit light. A brightness of a light emitted by the light-emitting component is adjustable. The brightness is partially adjustable by way of a pulse width modulated and/or amplitude modulated operating signal for the emitter, and the brightness is partially adjustable by way of partial absorption and/or reflection of the light emitted by the emitter in the dimming element. A dimming capability of the dimming layer increases along an extension direction transverse to the radiation direction. The dimming layer is displaceable along the extension direction relative to the light source. A degree of absorption and/or reflection of light emitted by the emitter is variably adjustable.