Threshold voltage detection circuit for OLED display device
US9947271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2016 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jul 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A threshold voltage detection circuit for OLED display device includes a multiplexer connected between a detection IC and each of multiple sub-pixel driver circuits of a pixel driver unit. A second DC signal having first and second levels with the first level smaller than the detection control signal and the second level larger than the detection control signal is fed to each of the sub-pixel driver circuits, such that during detection of threshold of a driver TFT, the second DC signal is switched to the second level and during detection of threshold of an OLED, the second DC signal is switched to the first level and a data signal is set at the same level as the detection control signal to achieve detection of the threshold voltages of the OLED and driver TFT of each sub-pixel driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.