Constant current supply drive for electrochromic displays of the segmented type
US4201985A · kind A · utility
8Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1977 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | May 24, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A driving circuit is provided for an electro-optical display which includes an electrochromic material and a predetermined number of display segments, various combinations of display segments defining different desired display patterns. The electrochromic phenomenon is developed within the electro-optical display upon a flow of current supplied through the display segments. The driving circuit is constructed so as to supply a predetermined amount of the flow of current to the display segments during variations of the light absorption properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.