Driving circuit for a matrix-addressed liquid crystal display device
US4082430A · kind A · utility
45Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1977 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jan 21, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a driving circuit for a liquid crystal display matrix, a source of a direct or low-frequency voltage is connected to drive the selected row and column electrodes, and a high frequency voltage is connected to the driving circuit so that the high frequency potential is effective in combination with the low frequency or direct voltage at non-frequency voltage is effective at the selected crossovers. The high frequency voltage suppresses changes in the optical properties of the liquid crystal at the non-selected crossovers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.