| CPC A61B 5/6843 (2013.01) [A61B 5/24 (2021.01); A61B 5/681 (2013.01); A61B 5/742 (2013.01); A61B 5/7475 (2013.01); A61B 5/02416 (2013.01); A61B 5/318 (2021.01)] | 18 Claims |
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1. A wearable electronic device, comprising:
a first electrode, a second electrode and a third electrode;
first circuitry including bias circuitry and electrode connection detecting circuitry; and
a processor configured to determine an operation state of the wearable electronic device for biometric signal measurement based on a first or a second operation state information received from the first circuitry,
wherein the first circuitry is configured to:
for detecting that the first electrode contacts a first portion of a living body without any contact between the living body and the third electrode:
output, via the bias circuitry, a first voltage to the second electrode for application of the first voltage to the first electrode,
compare a first reference voltage with the first voltage output from the first electrode, thereby resulting in a first comparison result, and
output, via the electrode connection detecting circuitry, the first operation state information indicating that the first electrode contacts the first portion of the living body without any contact between the living body and the third electrode, based on the first comparison result; and
for detecting that the third electrode contacts a second portion of the living body while the first electrode contacts the first portion of the living body:
output, via the bias circuitry, a second voltage to the second electrode for application of the second voltage to the first electrode and for application of the second voltage to the third electrode,
compare the first reference voltage with the second voltage output from the first electrode, thereby resulting in a second comparison result,
compare a second reference voltage with the second voltage output from the third electrode, thereby resulting in a third comparison result, and
output, via the electrode connection detecting circuitry, the second operation state information indicating that the third electrode contacts a second portion of the living body while the first electrode contacts the first portion of the living body, based on the second comparison result, and the third comparison result.
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