Display with redundant light emitting devices
US11727869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2021 |
| Grant date | Aug 15, 2023 |
| Priority date | — |
| Expiry date | Jul 24, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix display where in one embodiment each cell comprises: a driving circuit for providing current to light emitting devices placed in the cell under the control of a data driver signal, a first light emitting device location connected to the driving circuit and a second light emitting device location connected in series to the first light emitting device location. A first thin-film transistor (TFT) is connected in parallel with the first light emitting device location and a second TFT is connected in parallel with the second light emitting device location, its gate node connected to the gate node of the first TFT. One terminal of a third TFT is connected to the gate nodes of the first and second TFTs and selectively connects a control signal to the first and second TFTs under the control of a scan driver signal. The control signal determines which of a first or second light emitting device placed in the cell emits light when the driving circuit provides current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.