Output circuit, data driver circuit and display device
US8653893B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2011 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Aug 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0289
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An output circuit includes a differential input stage, an output amplifier stage, a current control circuit; an input terminal, an output terminal. The current control circuit includes a first circuit that includes a second current source connected between a first power supply terminal and the second current mirror, and exercises control of switching between activating the second current source to couple a current from the second current source to a current on an input side of the first current mirror, and deactivating the second current source, depending on whether or not the input voltage is higher by more than a first preset value than the output voltage; and a second circuit that includes a third current source connected between the second power supply terminal and the first current mirror, and exercises control of switching between activating the third current source to couple a current from the third current source to a current on an input side of the second current mirror, and deactivating the third current source, depending on whether or not the input voltage is lower by more than a second preset value than the output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.