Electronic devices with displays for mitigating cathode noise
US12327519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2022 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Jul 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D86/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display may include an array of pixels. Each pixel in the array may include a drive transistor, emission transistors, a data loading transistor, a gate voltage setting transistor, an initialization transistor, an anode reset transistor, a storage capacitor, and an optional current boosting capacitor coupled in series with an isolation transistor. A data refresh may include a initialization phase, a threshold voltage sampling phase, and a data programming phase. The threshold voltage sampling phase can be substantially longer than the data programming phase to decrease a current sampling level during the threshold voltage sampling phase, which helps reduce the display luminance sensitivity to temperature variations. During a data refresh, the isolation transistor can be turned on to provide current boosting. During emission periods, the isolation transistor is turned off to prevent cathode noise from potentially coupling through to one or more direct-current voltage nodes in the pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.