Electrostatic video display drive circuitry and displays incorporating same
US6317108A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2000 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Apr 25, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0209
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a low-cost, programmable electronically actuated, continuous use traffic sign including a pixellated display matrix, the display matrix being electronically actuatable to display a desired traffic information image display suitable for roadside and other vehicular use where it may be clearly viewed by direct sunlight during the day and by illumination at night. A preferred display is electrostatically actuated for low power requirements and comprises pixels which have spiral rollout shutters. The display can be remotely programmed and controlled, via a modem, and may be solar or battery powered, powered by a local power network or from a combination of the foregoing. Low-cost film technology manufacturing methods are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.