Wavelength-converting casting composition and its use

US6066861A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Klaus Höhn · Taufkirchen, DE
• Alexandra Debray · Regensburg, DE
• Peter Schlotter · Glückstadt, DE
• Ralf Schmidt · Nuremberg, DE
• Jürgen Schneider · Kirchzarten, DE

Key dates

• Filing date: May 20, 1998
• Grant date: May 23, 2000
• Expiry date: May 20, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The wavelength-converting casting composition is based on a transparent epoxy casting resin with a luminous substance admixed. The composition is used in an electroluminescent component having a body that emits ultraviolet, blue or green light. An inorganic luminous substance pigment powder with luminous substance pigments is dispersed in the transparent epoxy casting resin. The luminous substance is a phosphorous group of the general formula A.sub.3 B.sub.5 X.sub.12 :M, and the luminous substance pigments have particle sizes<20 .mu.m and a mean grain diameter d.sub.50 <5 .mu.m.