Electrochromic display device
US4773740A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1987 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Oct 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1525
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrochromic display device which comprises a display electrode comprising a transparent substrate, a transparent electrode formed on an inner surface of the transparent substrate and an electrochromic material layer for display made of tungsten oxide and formed on the transparent electrode; a counter electrode comprising a substrate, a conductive layer formed on an inner surface of the substrate and an activated carbon fiber material; and a spacer provided between the display electrode and the counter electrode with their inner surfaces facing each other to define, between them, an electrolyte chamber, which is filled with an electrolyte comprising a lithium salt and at least one of the tertiary alkyl ammonium salts and quarternary alkyl ammonium slats dissolved in a non-aqueous medium containing a small amount of water, which device has increased original injected charge which can last for a long time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.