Patent · US Active

Multilayer body with electrically controllable optically active systems of layers

US7940340B2 · kind B2 · utility

7Cited by

129References

21Claims

0Family size

Assignees

PolyIC GmbH & Co. KG · DE
LEONHARD KURZ Stiftung & Co. KG · DE

Inventors

Klaus Ludwig · Erlangen, DE
Wolfgang Clemens · Puschendorf, DE

Key dates

Filing date	Jul 4, 2006
Grant date	May 10, 2011
Priority date	—
Expiry date	Jul 30, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG03H2260/12
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A multilayer body (1) having an optically active first layer system (10) is described, in which case the first layer system (10) is an optically variable device (OVD), and the optical effect of the first layer system (10) can be influenced by an electrically controllable second layer system (20).

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