Method and apparatus for forming visible images
US4175836A · kind A · utility
12Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1977 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Apr 4, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/163
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for causing coloration of an electrochromic material includes passing through the material an electrical pulse above a coloration threshold potential for the material and of a predetermined polarity and subsequently applying a D. C. potential of the same polarity to the material of a magnitude less than the threshold potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.