Drive apparatus for a liquid crystal display screen
US5614923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Jul 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3696
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved drive apparatus for a LC display screen is provided. The inventioned drive apparatus includes a programmable time setting means for changing drive currents in accordance with the size of the LC display screen. Depending upon the size of the LC display screen, it is necessary to change the drive current for charging up the display as promptly as possible at an initial stage of operation. The inventioned drive apparatus includes at least one time setting register means for programmably pre-setting a time according to the size of the display screen and a circuit selection means for providing a low resistor selection signal and a high resistor selection signal in accordance with the pre-set time of the time setting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.