Patent · US Expired

Apparatus for electrolytic clear display on a dull base

US4431989A · kind A · utility

3Cited by

4References

16Claims

0Family size

Assignee

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

Hubert Grange · Grenoble, FR
Robert Meyer · Meylan, FR

Key dates

Filing date	Jun 30, 1981
Grant date	Feb 14, 1984
Priority date	—
Expiry date	Jun 30, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG02F1/1533
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Electrolytic device for light display on a dark background comprising a light source which illuminates a cell formed by two insulating walls between which is an electrolyte. One wall has an electrode comprising a plurality of segments for display and the other wall has a counter-electrode. The display is obtained by electrochemical deposition of dark coating material on the electrode.

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