AC drive circuit for OLED, drive method and display apparatus
US9286831B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 16, 2013 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Dec 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An AC drive circuit for OLED comprises a light emitting control unit, a charging control unit, a drive unit, a storage unit, a first voltage signal input terminal, a second voltage signal input terminal and a third voltage signal input terminal. The AC drive circuit enables that the current flowing in an OLED is independent of the internal resistance of the circuit, thus the brightness of the OLED will not be influenced by the internal resistance of the circuit. Meanwhile, the AC drive circuit compensates the threshold voltage of the drive transistor, thus the influence of the threshold voltage of the drive transistor on the current of the OLED for emitting light is eliminated. In addition, the AC drive circuit reversely biases the OLED, thereby the un-recombined carriers accumulated at the light emitting interface inside the OLED and the built-in electrical field formed by these carriers are eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.