Controlled analogue driver system
US6346903B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for generating a low-consumption controlling analogue voltage of stable value adapted for controlling LCD display segments that comprises an input circuit receiving an analogue voltage of given nominal value adapted to generate a picture analogue voltage of reduced value in a ratio k. A driver circuit is provided to receive the picture analogue voltage as a reference signal and a picture signal derived and reduced in the same ratio k from the low-consumption analogue voltage and comprises a differential amplifier supplied with a first and a second constant voltage value for outputting a first and a second switch control pulse. A switching circuit comprising a first switching branch outputting an amplified auxiliary switch control pulse synchronous with the reference signal and a second switching branch controlled by the amplified auxiliary switch control pulse is adapted to outputting the low-consumption analogue voltage switched to the analogue voltage of given value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.