Methods, systems and devices for crosstalk measurement and cancellation in optical proximity sensors
US8502153B2 · kind B2 · utility
2Cited by
1References
23Claims
0Family size
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Key dates
| Filing date | Nov 20, 2009 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Feb 21, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical proximity sensor and corresponding methods of measuring crosstalk in the sensor are disclosed. The amount of crosstalk generated between the light emitter and the light detector of an optical proximity sensor is measured and quantified according to one of two methods. The measured crosstalk may then be stored in a register or memory location and then subtracted from signals representative of signals indicative of the nearby presence of an object to be detected combined with crosstalk, thereby removing so the contribution or effect of crosstalk on such signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.