Optical emission device

US4907044A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Franz Schellhorn · Regensburg, DE
• Guenter Waitl · Regensburg, DE

Key dates

• Filing date: Jul 14, 1989
• Grant date: Mar 6, 1990
• Expiry date: Jul 14, 2009

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2224/48247

Abstract

An optical emission device with an emitter semiconductor chip and a cover intended to be suitable for backlighting areas, the device having a comparatively low structural height and low packing density. The cover has a light aperture formed using a convex and concave lens for radiating light in a solid angle of maximum size. This device can also be used in combination with an additional external reflector and diffusion screen.