Light emitting device including multiple OLEDs

US8179029B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Herbert Friedrich Boerner · Aachen, DE
• Stefan Peter Grabowski · Neuss, DE
• Hans-Helmut Bechtel · Roetgen, DE

Key dates

• Filing date: Feb 7, 2007
• Grant date: May 15, 2012
• Expiry date: Feb 7, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/3031

Abstract

The present invention relates to a light emitting device (30) having at least a first (10) and a second light emitting element (20), with the first light emitting element (10) emitting a first light (1) and the second light emitting element (20) emitting a second light (2), each light emitting element (10,20) being an OLED (10,20), the OLED (10,20) comprising a sandwich structure with a substrate (14,24), a first (11,21) and a second electrode (12,22) and an organic layer (13,23) being provided between the first (11,21) and the second electrode (12,22), a light (3) leaving the light emitting device (30), wherein at least a part of said light (3) is provided by a superposition of the first (1) and the second light (2).