Display apparatus, source driver, and gradation voltage generating circuit
US12361908B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2024 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Mar 19, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A source driver of the disclosure supplies a display device having a plurality of display cells with gradation voltages corresponding to respective luminance levels for the display cells indicated by a video signal. The source driver includes a gamma voltage generating circuit and a gradation voltage determination circuit. The gamma voltage generating circuit includes a resistor voltage dividing circuit with a plurality of output terminals. The plurality of output terminals output respective reference voltages divided according to gamma curve characteristics for generating the gradation voltages. The gradation voltage determination circuit measures an electric potential difference between one pair among the plurality of output terminals and determines whether or not the electric potential difference corresponds to a reference voltage group based on the gamma curve characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.