Common voltage calibration circuit and driving method thereof, circuit board and display device
US11328685B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 17, 2018 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Jan 1, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A common voltage calibration circuit and a driving method thereof, a circuit board and a display device are provided. The common voltage calibration circuit includes a difference circuit, a compensation circuit and a summing circuit; the difference circuit is configured to perform a difference processing on a common voltage provided by the common voltage input terminal and a feedback common voltage provided by the common voltage feedback terminal to output a difference value signal; the compensation circuit is configured to receive the difference value signal and compensate the common voltage based on the difference value signal; and the summing circuit is configured to superimpose at least two compensation signals output by the compensation circuit and output through the common voltage output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.