Patent · US Expired

Electrochromic display cell II

US4508432A · kind A · utility

2Cited by

1References

14Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Helmut Freller · Westerburg, DE
Konrad Mund

Key dates

Filing date	Sep 21, 1982
Grant date	Apr 2, 1985
Priority date	—
Expiry date	Sep 21, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/155
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An electrochromic display cell is described which has a front electrode of an electrochromic material, especially tungsten trioxide or iridium oxide, layered on a support surface and a rear electrode of vitreous carbon layered on a support surface. The rest potential and large capacity of the rear electrode permit a fast image cycle time at the front electrode and obviate the need to reverse potential polarity during cycling.

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