Electronic display with hybrid in-pixel and external compensation
US11282462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2020 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Oct 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display pixel is provided that is operable to support hybrid compensation scheme having both in-pixel threshold voltage canceling and external threshold voltage compensation. The display may include multiple p-type silicon transistors with at least one n-type semiconducting-oxide transistor and one storage capacitor. An on-bias stress phase may be performed prior to a threshold voltage sampling and data programming phase to mitigate hysteresis and improve first frame response. In low refresh rate displays, a first additional on-bias stress operation can be performed separate from the threshold voltage sampling and data programming phase during a refresh frame and a second additional on-bias stress operation can be performed during a vertical blanking frame. The display pixel may be configured to receive an initialization voltage and an anode reset voltage, either of which can be dynamically tuned to match the stress of the first and second additional on-bias stress operations to minimize flicker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.