Electrochromic device
US4726664A · kind A · utility
20Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Mar 24, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1557
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrochromic device comprising an oxidation coloring substance coloring in an oxidized state and a reduction coloring substance coloring in a reduced state which are formed on the surfaces of a pair of electrodes, respectively, and an electrolyte held between the two substances, wherein the oxidation coloring substance is a double salt containing an iron hexacyanoferrate and the reduction coloring substance is a tungsten-oxalic acid compound. The electrochromic device has a long life suitable for actual applications and a short response time and can operate at low applied voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.