Display device and method for driving same
US11094254B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Mar 28, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0233
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a current-driven display device employing an internal compensation scheme and capable of displaying a favorable image with no occurrence of a bright point not included in the original display content. A voltage Vg at a gate terminal of a drive transistor M1 is initialized in a pixel circuit 15 of an organic EL display device before a voltage of a data signal line Dj is written to a holding capacitor C1 via the drive transistor M1 in a diode-connected state. At this time, an initialization voltage Vini is supplied to the gate terminal via a first initialization transistor M4 and a threshold compensation transistor M3. In this manner, a path for initializing the gate terminal of the drive transistor M1 is formed by the first initialization transistor M4 and the threshold compensation transistor M3 connected in series to each other, thereby preventing a voltage reduction at the gate terminal due to leakage current in an off-state transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.