Method of control for an electrolytic display cell and especially a cell of the metal halide type and a circuit for the application of said method
US4255238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jun 13, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/163
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The electrolytic display cell comprises a plurality of electrodes having suitable shapes for character display, a counter-electrode and an electrolyte. A negative voltage is applied to one of the electrodes for writing on said electrode and a positive voltage is applied for erasure. On completion of erasure, the voltage between electrode and counter-electrode has a tendency to rise to a threshold value corresponding to a parasitic reaction. The end of the erasure pulses is determined by the instant at which the electrode--counter-electrode voltage rises to the threshold voltage corresponding to the production of a parasitic reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.