Patent · US Active

Electroluminescent device

US7952270B2 · kind B2 · utility

1Cited by

5References

14Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Hans-Helmut Bechtel · Roetgen, DE
Wolfgang Busselt · Roetgen, DE
Peter Josef Schmidt · Aachen, DE

Key dates

Filing date	Jul 4, 2006
Grant date	May 31, 2011
Priority date	—
Expiry date	Apr 21, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH10K50/125
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electroluminescent device comprising at least one electroluminescent light source (2) with an electroluminescent layer (21) for emitting a primary radiation with an emission characteristic around a mean emission direction (5), and at least one light-converting element (3) for converting at least part of the primary radiation into a secondary radiation, wherein the shape of the light-converting element (3) is adapted to the emission characteristic of the electroluminescent light source (2) so as to generate a defined correlated color temperature as a function of a viewing angle (10).

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