Circuit and method for common voltage feedback compensation and liquid crystal display device
US11062665B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 29, 2018 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Sep 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a circuit and method for common voltage feedback compensation and LCD. The circuit comprises: a timing controller and a power management circuit, the timing controller and the power management circuit being electrically connected; the timing controller providing a corresponding preset feedback compensation value to the power management circuit under different images; the power management circuit comprising a common voltage compensation circuit and an adder, and the adder integrating the feedback compensation value and a feedback common voltage returned from a feedback point in a display panel through addition obtain an integration result, the common voltage compensation circuit obtaining a common voltage compensation signal based on the integration result and providing the common voltage compensation signal to the display panel. The invention generates the feedback compensation value required for the common voltage feedback and provides to the power management circuit under different images through the timing controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.