Selecting electrode drive circuit for a matrix liquid crystal display
US4843252A · kind A · utility
2Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Aug 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0289
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A selecting electrode drive circuit is capable of providing drive pulses of twice as high having an amplitude twice as large as the breakdown voltage of semiconductor devices used in the circuit. The drive pulses thus provided are applied to selecting electrodes of a matrix type display device and the driving circuit includes a pulse generator for generating a train of reference pulses, a power supply connected to the pulse generator for level-shifting the reference pulses by the crest value of the power supply and a switching circuit is powered by the power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.