Matrix display systems
US5014048A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/367
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix addressed liquid crystal display system suitable for TV purposes, driven by applying to one of the conductors associated with each display element drive signals comprising a selection signal portion for setting a display condition followed by a sustain signal portion for sustaining that condition for an interval prior to receipt of the next selection signal, the magnitude of the sustain signal is decreased over its duration, thereby avoiding vertical cross-talk problems or the need to increase the number of diode structures. The sustain signal is decreased gradually, either continuously or in steps, so as to minimise the mean voltage across the non-linear element, and preferably in accordance with the decay time constant of the liquid crystal material of the display element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.