Display device having a feedback loop for a power supply voltage
US11107397B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2019 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Sep 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device includes a display panel including pixels, a data driver providing data signals to the pixels, a scan driver providing scan signals to the pixels, a DC-DC converter converting an input voltage to a power supply voltage and supplying the power supply voltage to the display panel, a feedback circuit having a variable impedance and providing a feedback path of the power supply voltage to the DC-DC converter by receiving the power supply voltage supplied from the DC-DC converter to the display panel and providing an error signal corresponding to a difference between the feedback voltage and a reference voltage to the DC-DC converter, and a controller controlling the data driver and the scan driver, calculating a panel load of the display panel based on input image data, and adjusting the variable impedance of the feedback circuit according to the calculated panel load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.