Patent · US Expired

Sign, especially a number plate for a motor vehicle

US7698842B2 · kind B2 · utility

4Cited by

9References

18Claims

0Family size

Assignees

VOLKSWAGEN AKTIENGESELLSCHAFT · DE
Fitzke Werberechnik · DE

Inventors

Michael FITZKE · Lehre, DE
Michael Mueller · Gifhorn, DE

Key dates

Filing date	Jan 17, 2003
Grant date	Apr 20, 2010
Priority date	—
Expiry date	Nov 17, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH05B33/145
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A plate, e.g., a license plate for motor vehicles, includes a base body which is made of an electrically conductive material, or has an electrically conductive layer applied either directly or via a further layer. Thus, the electrically conductive base body or its electrically conductive coating forms a first electrode of a flat capacitor. A layer having an electroluminescent pigmentation is applied on the base body or the electrically conductive layer. The electroluminescent coating may be applied by various methods, e.g., spray painting, brushing, special screen-printing methods, etc. To create the electrical field, it may be necessary to apply to the electroluminescent layer an electrically conductive layer for forming the second electrode.

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