Bistable display with permuted excitation
US5034736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3685
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid-crystal display system includes a display having a bistable liquid-crystal material, such as a ferroelectric material, and two sets of electrodes disposed substantially perpendicularly to each other and on opposite sides of a layer of the liquid-crystal material. In each set of electrodes, drive circuitry is connected via resistors to front terminals of each of the electrodes, and via resistors to back terminals of each of the electrodes. The drive circuitry provides further that drivers having equal number of output drive ports are coupled via a network of electrical conductors to the front terminals and the back terminals of electrodes in each set of the electrodes in accordance with an arrangement wherein the front terminals are arranged in groups such that, within each group, the front terminals are connected to corresponding ports of a driver. A similar arrangement is provided for the connection of the back ports to a driver subject to the proviso that the terminals in the various groups are coupled to the driver ports by a permuted arrangement allowing each electrode in a set of electrodes to be unambiguously identified by a pair of driver ports wherein one port of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.