Adaptive ambient light auto-movement blocking in optical navigation modules
US9098144B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Sep 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0383
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of optical navigation modules (ONM) and methods of operating the same to block auto-movement due to ambient light are described. Generally, the method includes: (i) collecting a plurality of PD signal samples from a photodiode (PD) in an optical navigation module (ONM); (ii) determining a peak-to-peak variation (ΔPD) in the plurality of PD signal samples; (iii) comparing the peak-to-peak variation (ΔPD) to a specified threshold peak-to-peak variation (ΔPDSPEC); and (iv) if ΔPD is less than ΔPDSPEC, suppressing reporting of motion data derived from signals from a photodetector array (PDA) in the ONM to block auto-movement in an output from the ONM. Other embodiments are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.