Light-emitting diode with a structured surface

US6649939B1 · kind B1 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventor

• Ralph Wirth · Lappersdorf, DE

Key dates

• Filing date: Jun 25, 2002
• Grant date: Nov 18, 2003
• Expiry date: Jun 25, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/819

Abstract

For improving the light output, a light-emitting diode has at least one section of a light exit-side surface covered with a plurality of truncated pyramids. Light radiations, which are emitted by a light-generating layer, enter into the truncated pyramids through a base area and are efficiently coupled out of the sidewalls of the pyramids.