Method of detecting threshold voltage shift and threshold votage shift detection device
US11386820B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 21, 2020 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Apr 21, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of detecting threshold voltage shift and a threshold voltage shift detection device are provided. The method is applied to a pixel driving circuit which I is electrically coupled to a control line, a voltage line and a detection node, respectively. The method includes: in a detection cycle including a setting phase and a detection phase, in the setting phase, controlling a transistor included in the pixel driving circuit to be in a biased state; in the detection phase, providing a preset control voltage signal to the control line, providing a preset voltage signal to the voltage line, and determining a threshold voltage shift state of the transistor according to an electric potential of the detection node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.