Electric memory detector in an ECD driver
US4300138A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Nov 9, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an electrochromic display comprising a back plate electrode, a plurality of display electrodes, and a reference electrode available for maintaining the potential of the respective display electrodes at a fixed value, there is provided a detector for sensing the counter electromotive force which is developed between the display electrodes and the reference electrode in a manner such that there is created a remarkable difference in the output voltage signal thereof between in the colored state and in the bleached state. Therefore, the output signal from the detector indicates whether the electrochromic display is held in the colored state or the bleached state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.