Pixel circuit with compensation for drift of threshold voltage of OLED, driving method thereof, and display device
US10679554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2016 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Apr 30, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0264
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a pixel circuit. The pixel circuit comprises a driving transistor and a light-emitting element both coupled in series between a first level end and a second level end, and comprises a second transistor, a third transistor, a fourth transistor, a first capacitor and a second capacitor. The second capacitor is coupled between a control electrode of the driving transistor and a second end of the light-emitting element. A threshold voltage is stored by the first capacitor, so that threshold voltage compensation for the driving transistor and the light-emitting element is implemented, and therefore the non-uniformity of the display of the pixel circuit is compensated. Also provided is a display device, wherein a first control line and a light-emitting control line are both global lines. Also disclosed is a pixel circuit driving method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.