Pixel circuit, display, and method
US11404004B2 · kind B2 · utility
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1References
19Claims
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Key dates
| Filing date | Sep 10, 2020 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Sep 10, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/123
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel circuit for an active matrix organic light emitting diode (AMOLED) and other active matrix displays is disclosed. The pixel circuit is programmed by the voltage supplied through a data line. An electrical current through a light emitting device for a known LED voltage and a pixel current for a pixel programed with a known data signal can be measured by a readout circuit through the data line. A 7T1C implementation enables to pre-charge the drive transistor to a reference voltage in each drive cycle, and to pre-set the light emitting device to a reference voltage prior to emission in each cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.