Pixel driving circuit with capacitor having threshold voltages information storing function, pixel driving method and light emitting display device
US8723843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Feb 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel driving circuit, a pixel driving method and a light emitting display device are provided in the present invention. The pixel driving circuit includes first through fifth transistors and a capacitor and is for driving a light emitting diode. The third transistor forms a diode connection to make information of the threshold voltages of both the third transistor and the light emitting diode be stored in the capacitor in a data writing period. In a light emitting period, the second transistor compensates drift variation of the threshold voltages of the third transistor and the light emitting diode according to the information stored in the capacitor to provide a stable driving current for driving the light emitting diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.