Wearable device, optical module and driving method thereof
US11016254B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 10, 2019 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Oct 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical module includes an optical transmitting assembly and a driver. The optical transmitting assembly is configured to emit an optical signal based on a driving current. The driver includes a calibration circuit and a driving current setting circuit. The calibration circuit is configured to obtain an original monitoring current feedback value MONDACbefore corresponding to a monitoring current of the optical transmitting assembly, obtain a tracking error value TE of a current temperature relative to a reference temperature, and calibrate the original monitoring current feedback value MONDACbefore based on the tracking error value to obtain a calibrated monitoring current feedback value MONDACafter. The driving current setting circuit is configured to set the driving current based on the calibrated monitoring current feedback value MONDACafter to control the optical power output by the optical transmitting assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.