Active matrix organic light emitting diode (AMOLED) display, a pixel driving circuit, and a driving method thereof
US7847774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2005 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Dec 6, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel driving circuit of an active matrix organic light emitted diode display is provided with an input first scanning voltage signal and an input displaying voltage signal. The pixel driving circuit comprises a driving thin film transistor (TFT), an organic light emitted diode (OLED), and a capacitor. The capacitor has a first end connected to a gate electrode of the driving TFT to store a potential respect to the displaying voltage signal and having the driving TFT generate a steady current flowing through the OLED. The capacitor has a second end provided with a second scanning voltage signal, which has a level range larger than that of the displaying voltage signal, partially overlapping with the first scanning voltage signal so as to generate a negative bias in the driving TFT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.