Display apparatus including light emitting device and pixel driving circuit
US12223886B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2023 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Oct 12, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0294
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A display apparatus including a light emitting device and a pixel driving circuit is disclosed. The pixel driving circuit supplies drive current corresponding to a data signal. The pixel driving circuit includes a driving thin film transistor and switching thin film transistors. The switching thin film transistors include a sampling thin film transistor electrically connected between a driving gate electrode and a driving source electrode of the driving thin film transistor. A sampling semiconductor pattern of the sampling thin film transistor is disposed between a sampling light shielding pattern and a sampling gate electrode of the sampling thin film transistor. A cross-section of at least one of the sampling light shielding pattern or the sampling gate electrode has a concave shape with reference to the sampling semiconductor pattern. A variation in characteristics of the sampling thin film transistor by light emitted from the light emitting device is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.