Display driver and display device having variable refresh rate synchronization function suppressing flicker occurrence
US11670254B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 2022 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | Feb 17, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention includes a common voltage generation part, a reference gamma voltage generation part, a gamma compensation part, a gradation voltage generating circuit, and a DA conversion part. The common voltage generation part generates a common voltage by amplifying a reference common voltage and applies the common voltage to a common electrode of a display panel. The reference gamma voltage generation part generates reference gamma voltages. The gamma compensation part takes in a voltage of the common electrode as a feedback common voltage from the display panel and generates compensation reference gamma voltages in which voltage values of the respective reference gamma voltages are adjusted on the basis of a difference between the feedback common voltage and the reference common voltage. The gradation voltage generating circuit generates gradation voltages on the basis of the compensation reference gamma voltages. The DA conversion part selects a gradation voltage corresponding to a display data piece from the gradation voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.