Output circuit, data driver, and display device
US8988402B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2011 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45728
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An output circuit includes a differential amplifier circuit, an output amplifier circuit, a control circuit, input and output terminals, and first to third supply terminals applied with first to third supply voltages, respectively. The third supply voltage is set a voltage between the first and second supply voltages. The differential amplifier circuit differentially receives signals of the input and output terminals. The output amplifier circuit includes first and second transistors of different conduction type each other coupled in series between the first and third supply terminals via the output terminal, and having control terminals coupled to first and second output nodes of the differential amplifier circuit, respectively. The control circuit includes a third transistor and a switch, and controls the third transistor being in a diode coupling mode between the first supply terminal and the control terminal of the first transistor for a given period of the output period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.