MULTI-MODE CAPACITIVE SENSOR

A method and device for providing a multi-modal capacitive sensor, including a plurality of sensor electrodes, in an electronic device is provided. In a first mode, the capacitive sensor is configured to capture an image of a biometric object. In a second mode, the capacitive sensor is configured to...

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Bibliographic Details
Main Authors Thompson Erik Jonathon, ERDOGAN Ozan Ersan, TAPARIA Ajay, SHEN Guozhong
Format Patent
LanguageEnglish
Published 01.09.2016
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
TESTING
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Summary:A method and device for providing a multi-modal capacitive sensor, including a plurality of sensor electrodes, in an electronic device is provided. In a first mode, the capacitive sensor is configured to capture an image of a biometric object. In a second mode, the capacitive sensor is configured to provide presence detection functionality. In the second mode, the capacitive sensor includes at least one first electrode and at least one second electrode selected from a plurality of sensor electrodes. When operating in the second mode, the at least one first electrode is configured to receive a transmit signal, and the at least one second electrode is configured to receive a resulting signal capacitively coupled from the at least one first electrode. Based on the resulting signal, a processing system of the electronic device determines whether a biometric object to be imaged is present in the sensing area.
Bibliography:Application Number: US201514681811