Display apparatus output circuit selectively providing positive and negative voltages realized in reduced area in a simple configuration
US11756501B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2022 |
| Grant date | Sep 12, 2023 |
| Priority date | — |
| Expiry date | Feb 15, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0291
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An output circuit includes a first switch that outputs a positive voltage signal received via a first node when in an ON state, a second switch that outputs a negative voltage signal received via a second node when in an ON state, third and fourth switches that set the first and second nodes to a reference power supply voltage when in an ON state, a first voltage follower circuit that supplies a voltage obtained by shifting a voltage of the positive voltage signal supplied to the first node to a negative side by a predetermined voltage difference to a gate of the first switch, and a second voltage follower circuit that supplies a voltage obtained by shifting a voltage of the negative voltage signal supplied to the second node to a positive side by a predetermined voltage difference to a gate of the second switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.