Pulse-rate detection using a fingerprint sensor
US8433110B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2010 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Oct 16, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1172
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Provided is a fingerprint sensor configured for detecting a pulse of a human or other mammal. A time series of fingerprint images is analyzed to identify time-based variations in spatial location and/or pressure from ridges of a finger, where the variations result from time-based variations in the flow of blood. Based on the analysis, a determination is made if the time-based variations are indicative of a pulse in a digit of the person, and if so, a determination is made as to the pulse rate based on the variations. Imaging sensitivity of the digit at the fingerprint sensor is optimized for determination of the pulse. The time series of fingerprint images is also analyzed to determine if there is bulk motion of the digit, in which case pulse rate analysis is temporarily suspended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.