Signal processing device without mechanical switch for on/off operation
First Claim
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1. A signal processing device, comprising:
- a detection unit configured to detect an intent to use the signal processing device based on a determination of whether the signal processing device is in electrical contact with a subject, the detection unit comprising two first electrical contacts; and
a power supply unit configured to supply power to operate the signal processing device based on the detected intent and generate a bias voltage separate from the power, the power supply unit comprises an enable terminal; and
wherein the detection unit is configured to perform the determining of whether the signal processing device is in electrical contact with the subject by supplying a first voltage of the bias voltage to one of the two first electrical contacts and sensing a second voltage from another of the two first electrical contacts, and when the determination indicates that the signal processing device is in electrical contact with the subject the two first electrical contacts are contacting one of the subject and a first conductive member of a biometric electrode unit,wherein the another of the two first electrical contacts is connected to the enable terminal,wherein the power supply unit is configured to maintain the supplied power during a predetermined threshold after the detection unit no longer detects that the signal processing device is in electrical contact with the subject.
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Abstract
A signal processing device includes a detection unit configured to detect an intent to use the signal processing device based on whether the signal processing device is in contact with a subject; and a power supply unit configured to supply power to operate the signal processing device based on the detected intent to use the signal processing device without using a separate ON/OFF switch to supply the power to operate the signal processing device.
18 Citations
19 Claims
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1. A signal processing device, comprising:
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a detection unit configured to detect an intent to use the signal processing device based on a determination of whether the signal processing device is in electrical contact with a subject, the detection unit comprising two first electrical contacts; and a power supply unit configured to supply power to operate the signal processing device based on the detected intent and generate a bias voltage separate from the power, the power supply unit comprises an enable terminal; and wherein the detection unit is configured to perform the determining of whether the signal processing device is in electrical contact with the subject by supplying a first voltage of the bias voltage to one of the two first electrical contacts and sensing a second voltage from another of the two first electrical contacts, and when the determination indicates that the signal processing device is in electrical contact with the subject the two first electrical contacts are contacting one of the subject and a first conductive member of a biometric electrode unit, wherein the another of the two first electrical contacts is connected to the enable terminal, wherein the power supply unit is configured to maintain the supplied power during a predetermined threshold after the detection unit no longer detects that the signal processing device is in electrical contact with the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A signal processing device, comprising:
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a biometric electrode unit comprising; a first conductive member configured to not be in contact with a subject when the biometric electrode unit is in contact with the subject; and at least two second conductive members, of a plurality of second conductive members arranged to electrically contact at least three separate regions of the subject, to receive a biometric signal from the subject; two first electrical contacts arranged to electrically contact with the first conductive member; and a circuit unit configured to receive a signal through one of the two first electrical contacts in response to power supplied to another of the two first electrical contacts from a battery based on whether the other of the two first electrical contacts is in contact with the first conductive member, and process the received signal; and a detection unit configured to detect an intent to use the signal processing device based on the received signal, wherein the battery supplies a bias voltage separate from the power to one of the two first electrical contacts and the circuit unit receives the signal by using the power supplied to the another of the two first electrical contacts, wherein the power is maintained during a predetermined threshold after the detection unit no longer detects the intent to use the signal processing device based on the received signal. - View Dependent Claims (19)
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Specification