Organic electroluminescent optocouplers

US8417081B2 · kind B2 · utility

Assignee

• Cambridge Display Technology Limited · GB

Inventors

• Julian Carter · Chesterton, GB
• Jonathan Halls · Cambridge, GB

Key dates

• Filing date: Jun 19, 2007
• Grant date: Apr 9, 2013
• Expiry date: Jun 19, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K39/30

Abstract

An optocoupler including: a substrate comprising a photodetector; a transparent electrically-insulating layer disposed over the photodetector; and an organic electroluminescent device having an organic electroluminescent layer disposed between a first and a second electrode disposed over the transparent electrically-insulating layer; the photodetector arranged to detect light emitted from the organic electroluminescent device; wherein the optocoupler comprises a second current path between the first and second electrodes in addition to a first current path between the first and second electrode which in operation causes the organic electroluminescent layer to emit light.