Electrostatic display device
US4160583A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Mar 28, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Mar 28, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F9/372
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrostatic display device includes a casing with a pair of side walls, a fixed electrode having a cylindrical surface and a ridge at the upper most portion of the surface, a pair of flaps of resilient sheet electrode standing adjacent to the fixed electrode along the inner surface of the side walls, and a layer of insulating material provided on the outer surface of the fixed electrode and/or the inner surface of the resilient sheet electrode, whereby upon applying a voltage to the electrodes, the resilient flaps are attracted to the cylindrical surface of the fixed electrode and cover the same in a moment, changing the appearance of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.