Display device
US11844252B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2019 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | Aug 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This application discloses a current-driven display device able to suppress degradation in display quality due to a luminance gradient or the like caused by a voltage drop across a power supply line while avoiding an increase in size of the circuit as much as possible. In an organic EL display device, a high-level power supply line includes a main wiring line, trunk wiring lines branching off from the main wiring line and extending in a column direction, and branch wiring lines extending in a row direction along scanning signal lines, respectively. The trunk wiring lines and the branch wiring lines are formed in different layers from each other with an insulating layer interposed therebetween, where each branch wiring line is electrically connected conductively to at least one trunk wiring line through a contact hole, and each trunk wiring line is electrically connected conductively to only one branch wiring line through a contact hole. Each of pixel circuits is configured such that no current flows in a data write period thereof, so that no voltage drop is generated in the data write period across the corresponding branch wiring line and the trunk wiring line connected to the corr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.