Tungsten niobate electrochromic device
US4225216A · kind A · utility
16Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1979 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Feb 21, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1524
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an electro-optical device in which color changes are electrically induced in an electrochromic material which is a single or polycrystalline niobium tungstate represented approximately by the formula W.sub.9 Nb.sub.8 O.sub.47. The device comprises an ion source and a source of an electrical field which may be reversible so as to produce coloring and bleaching of the electrochromic material. Due to high corrosion resistance of such material, the ion source may conveniently be a hydrous electrolyte.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.