Display compensation using current sensing across a diode without user detection
US11488529B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2020 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Jun 19, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A current-voltage (IV) relationship of a pixel having a diode is initially determined. A first voltage is determined that does not cause the diode to emit light, and a first current across the diode is sensed by applying the first voltage. A predetermined current is determined based on the first voltage and the IV relationship. A ratio is determined based on the first current, a target current, and the predetermined current. A ratio voltage is determined by applying the ratio to a predetermined target voltage. If the first current is less than the predetermined current, then the ratio voltage is applied to supply a target current to the diode. If the first current is greater than the predetermined current, then a second voltage is determined by averaging the first test voltage and the ratio voltage, and the second voltage is applied to supply the target current to the diode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.