Self-calibrating optical transceiver system with reduced crosstalk sensitivity for through-display proximity sensing
US11150332B1 · kind B1 · utility
13Cited by
34References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 30, 2020 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jun 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensing system includes a transmitter side and a receiver side, and is configured to be positioned below a display of an electronic device. The transmitter side includes a light emitter, a temperature sensor, and a photodiode. The receiver side includes a photodiode and a temperature sensor. The optical sensing system includes an application-specific integrated circuit that leverages the temperature sensors, the photodiodes, and one or more signal filters such as a high-pass filter to perform multiple field calibrations of the optical sensing system, thereby improving accuracy and precision thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.