Method of driving electrochromic display device and electrochromic display device therefor
US4322133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1979 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Dec 11, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of driving an electrochromic display device and the electrochromic display device therefor the latter including an electrochromic display cell having two opposed substrates at least one of which is transparent, a plurality of electrodes respectively applied to the opposed substrates and an electrochromic substance held in contact with said plurality of electrodes between said opposed substrates so as to reversibly vary its light absorbing characteristics by an electric current applied to the electrodes, and a driving circuit coupled to the electrochromic display cell for driving the latter, wherein erasing the display of the electrochromic cell is done in such a manner that the erasing current will be stopped eventually by the electrochromic substance itself in order to secure complete erasure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.