Patent · US Active

White light illumination device

US9506626B2 · kind B2 · utility

6Cited by

7References

14Claims

0Family size

Assignee

Schott AG · DE

Inventors

Volker Hagemann · Klein-Winternheim, DE
Bernd Woelfing · Mainz, DE

Key dates

Filing date	Sep 22, 2014
Grant date	Nov 29, 2016
Priority date	—
Expiry date	Jan 3, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An illumination device for generating white light is provided. The device includes a converter and a filter. The converter has a Ce:YAG ceramic, which converts blue excitation light into yellow light of a color location near the white point in the chromaticity diagram. The filter attenuates a light fraction below 530 nm so as to obtain the white light.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.