Pixel sensing device and method, data driver and organic light-emitting display device
US10867558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Sep 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device includes a display panel, a sensing circuit, and a compensation circuit. The sensing circuit senses a current generated by a pixel of the display panel. The sensing circuit includes an integrator circuit, a comparator, and a counter. The integrator circuit is initialized to have a first reference voltage as an output. The output of the integrator circuit changes with a rate according to the sensed current. The comparator compares the output of the integrator circuit to a second reference voltage. The counter determines a time for the output of the integrator circuit to reach the second reference voltage from the first reference voltage. The compensation circuit receives the determined time and determines a compensation amount from the received time. The compensating circuit further compensates a display voltage for the pixel by the determined compensation amount in a subsequent display frame of the display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.