Pixel unit driving circuit having an erasing transistor and matching transistor, and method thereof
US9355595B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 6, 2012 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Apr 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel unit driving circuit and a method thereof, a pixel unit and a display apparatus can improve uniformity in the brightness of an OLED panel. The pixel unit driving circuit comprises a driving thin film transistor (DTFT), a matching thin film transistor (MTFT), a signal-erasing thin film transistor (ETFT), a charging control unit (31), a driving control unit (32) and a storage capacitor (Cs). A gate of the driving thin film transistor (DTFT) is connected with a first end of the storage capacitor (Cs) and is connected with a driving power supply (VDD) via the charging control unit (32), a source thereof is connected with a driving power supply (VSS), and a drain thereof is connected with the OLED. A gate and drain of the signal-erasing thin film transistor (ETFT) is connected with the second end of the storage capacitor (Cs), a source of the signal-erasing thin film transistor (ETFT) is connected with the gate and the drain of the matching thin film transistor, and is connected with the data line via the charging control unit (31). A source of the matching thin film transistor (MTFT) is connected with a second end of the storage capacitor (Cs).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.