KR20200075737A - Electronic device comprising earphone receiver and method for controlling the same - Google Patents

Abstract

Provided is an electronic device including: an earphone including a first impedance component; a signal generator for outputting a first AC signal; a first circuit which includes at least one first analog element electrically coupled to the first impedance component and having an impedance component, receives the first AC signal, and outputs a first detection signal including a voltage component corresponding to the first impedance component; and one or more processors that generate and output at least one biometric information based on the first detection signal. According to the present invention, by acquiring biometric information using the earphone, a user can obtain biometric information without performing a separate operation for collecting the biometric information.

Description

Electronic device comprising earphone receiver and method for controlling the same}

Embodiments of the present disclosure relate to an electronic device including an earphone and an electronic device control method.

2. Description of the Related Art Various technologies for obtaining biometric information in electronic devices have been developed. The electronic device may monitor a user's body condition using biometric information and provide various health information based on the biometric information. In addition, biometric information may be used for various purposes such as user authentication and device control. However, in order to collect biometric information, a user may perform a separate operation, or a part of the body must contact a predetermined location of the electronic device, which may cause user inconvenience. In addition, it is difficult to collect accurate biometric information due to factors such as the surrounding environment.

Embodiments of the present disclosure are to provide an apparatus and method for acquiring biometric information without a user performing a separate operation for collecting biometric information by obtaining biometric information using an earphone.

In addition, embodiments of the present disclosure are to provide an apparatus and method for obtaining biometric information through the earphone 110 while outputting audio through the earphone.

According to an aspect of an embodiment of the present disclosure, an earphone including a first impedance component; A signal generator outputting a first AC signal; And at least one first analog element electrically coupled to the first impedance component and having an impedance component, receiving the first AC signal, and including a voltage component corresponding to the first impedance component A first circuit for outputting the first detection signal; And one or more processors generating and outputting at least one biometric information based on the first detection signal.

According to an embodiment of the present disclosure, the electronic device has a form in which the earphone is inserted into the external auditory meatus, and the size of the first impedance component changes according to a change in the external auditory meatus pressure.

According to an embodiment of the present disclosure, the at least one biometric information includes heart rate information, and the one or more processors generate heart rate information based on a phase component of the first detection signal.

According to an embodiment of the present disclosure, the at least one biometric information includes body temperature information, and the one or more processors generate body temperature information based on an amplitude component of the first detection signal.

According to an embodiment of the present disclosure, the first AC signal has a frequency in the ultrasonic range.

According to an embodiment of the present disclosure, the first AC signal has a frequency of 20 kHz or more and 40 kHz or less.

According to one embodiment of the present disclosure, the first circuit includes an in-phase signal of an in-phase component and an orthogonal signal of an orthogonal phase component from an intermediate detection signal of a node connected to the first AC signal and the first analog element. The first detection signal is generated, and the first detection signal is output to the one or more processors.

According to one embodiment of the present disclosure, the one or more processors may include:

Body temperature information is generated based on a sum of square values of each of the in-phase signal and the orthogonal signal, and heart rate information is generated based on the phase information extracted from the in-phase signal and the orthogonal signal.

According to an embodiment of the present disclosure, the first circuit includes a second impedance element, a third impedance element, and a fourth impedance element connected to the first impedance component and a bridge circuit structure, and the At least one of the first node or the second node of the bridge circuit structure or a combination thereof, the in-phase signal and the quadrature of the in-phase component from the intermediate detection signal output from the third node of the bridge circuit structure A quadrature signal of a phase component is generated, and the in-phase signal and the quadrature signal are output to the one or more processors.

According to an embodiment of the present disclosure, two impedance elements directly connected to the first node have the same impedance value, and two impedance elements directly connected to the second node have the same impedance value.

According to an embodiment of the present disclosure, the first node receives the first AC signal, the second node receives the first AC signal 180 degrees out of phase, and the first impedance component is a fourth node. And the first node, and the fourth node is connected to a ground potential.

According to an embodiment of the present disclosure, the first node receives the first AC signal, the second node is connected to a ground potential, and the first impedance component is between the second node and the fourth node. Connected, the first circuit differentially amplifies the signal of the fourth node and the signal of the third node to generate the first detection signal.

According to an embodiment of the present disclosure, the first impedance component is connected between the second node and the fourth node, and the second impedance element is connected between the first node and the fourth node, and the first impedance component is A third impedance element is connected between the first node and the third node, the fourth impedance element is connected between the second node and the third node, and the earphone has a first resistance component and a first inductance component , Wherein the second impedance element includes a second resistor, the third impedance element includes a third resistor and a third capacitor connected in parallel with the third resistor, and the fourth impedance element comprises a fourth resistor. Including, the first resistance component and the fourth resistor have the same size of the resistance component, the second resistor and the third resistor have the same size of the resistance component, and the third capacitor is the {first inductance component/( Resistance component of the third resistor * Resistance component of the fourth resistor)} has a power storage component of a size.

According to an embodiment of the present disclosure, the first impedance component is connected between the second node and the fourth node, and the second impedance element is connected between the first node and the fourth node, and the first impedance component is A third impedance element is connected between the first node and the third node, the fourth impedance element is connected between the second node and the third node, and the first impedance component is the second node and the A 1-1 resistance component and a first inductance component connected in series between a fourth node, and a 1-2 resistor connected in parallel with a 1-1 resistance component and a first inductance component between the second node and the fourth node Component, the second impedance element includes a second resistor, and the third impedance element includes a third resistor and a third capacitor connected in parallel between the first node and the third node, and The fourth impedance element includes a 4-1 resistor, a 4-2 resistor, and a fourth capacitor connected in parallel between the second node and the third node.

According to an embodiment of the present disclosure, the first-first resistance component and the fourth-first resistance have the same size of the resistance component, and the second resistance and the third resistance have the same size of the resistance component, and the first The size of the 1-2 resistance component and the resistance component of the 4-2 resistor are the same, and the third capacitor is the size of the {first inductance component/(resistance component of the third resistor * the resistance component of the 4-1 resistor)}} It has a power storage component.

According to an embodiment of the present disclosure, the first circuit includes a band pass filter and an envelope detector, and the band pass filter and the first intermediate detection signal of a node connected to the first analog element are Generating a second intermediate detection signal modulated with an envelope detector, and generating the first detection signal including an amplitude variation component signal and a DC component signal generated from the second intermediate detection signal, wherein the one or more processors are configured to: Heart rate information is generated from the amplitude fluctuation component signal, and the body temperature information is generated from the DC component signal.

According to an embodiment of the present disclosure, the first circuit receives an electrical audio signal corresponding to an audio signal output through the earphone, processes the audio signal with a high pass filter, and then processes the first circuit. Apply to at least one node.

According to one embodiment of the present disclosure, the first circuit includes an in-phase signal of an in-phase component and an orthogonal signal of an orthogonal phase component from an intermediate detection signal of a node connected to the first AC signal and the first analog element. The first detection signal is generated, and the one or more processors generate an amplitude component amplitude signal and a phase component phase signal from the in-phase signal and the orthogonal signal, and use the amplitude signal and the phase signal to generate the electronic device. Removes the movement component.

According to one embodiment of the present disclosure, the first circuit includes an in-phase signal of an in-phase component and an orthogonal signal of an orthogonal phase component from an intermediate detection signal of a node connected to the first AC signal and the first analog element. The first detection signal is generated, and the one or more processors generate an amplitude component amplitude signal and a phase component phase signal from the in-phase signal and the orthogonal signal, and the amount of change in at least one of the amplitude signal or the phase signal The wearing or detachment of the electronic device is detected based on the.

According to another aspect of an embodiment of the present disclosure, in a method of controlling an electronic device, the electronic device includes an earphone including a first impedance component, and an impedance component electrically connected to the first impedance component A first circuit including at least one first analog element having a, and the electronic device control method comprises: controlling to output a first AC signal to the first circuit; Obtaining a first detection signal including a voltage component corresponding to the first impedance component from the first circuit; Generating at least one biometric information based on the first detection signal; And outputting the at least one biometric information.

According to an embodiment of the present disclosure, the electronic device has a form in which the earphone is inserted into the external auditory meatus, and the size of the first impedance component changes according to a change in the external auditory meatus pressure.

According to an embodiment of the present disclosure, the at least one biometric information includes heart rate information, and the electronic device control method includes generating heart rate information based on a phase component of the first detection signal. .

According to an embodiment of the present disclosure, the at least one biometric information includes body temperature information, and the electronic device control method includes generating body temperature information based on an amplitude component of the first detection signal. It further includes.

According to an embodiment of the present disclosure, the first AC signal has a frequency in the ultrasonic range.

According to an embodiment of the present disclosure, the first AC signal has a frequency of 20 kHz or more and 40 kHz or less.

According to an embodiment of the present disclosure, the electronic device control method may include, in the first circuit, an in-phase signal of an in-phase component and an orthogonal phase from an intermediate detection signal of a node connected to the first AC signal and the first analog element. And generating the first detection signal including the orthogonal signal of the component.

According to an embodiment of the present disclosure, the electronic device control method includes generating body temperature information based on a sum of square values of each of the common-mode signal and the quadrature signal, and extracted from the common-mode signal and the orthogonal signal And generating heart rate information based on the phase information.

According to an embodiment of the present disclosure, the first circuit includes a second impedance element, a third impedance element, and a fourth impedance element connected to the first impedance component and a bridge circuit structure, and the The electronic device control method includes receiving the first AC signal through at least one of the first node or the second node of the bridge circuit structure or a combination thereof, and an intermediate detection signal output from the third node of the bridge circuit structure. And generating an in-phase signal of the in-phase component and an orthogonal signal of the quadrature-phase component, and outputting the in-phase signal and the orthogonal signal.

According to an embodiment of the present disclosure, two impedance elements directly connected to the first node have the same impedance value, and two impedance elements directly connected to the second node have the same impedance value.

According to an embodiment of the present disclosure, the electronic device control method may include receiving the first AC signal at the first node, and receiving the first AC signal delayed by 180 degrees from the second node. Further comprising, the first impedance component is connected between the fourth node and the first node, the fourth node is connected to the ground potential.

According to an embodiment of the present disclosure, the first node receives the first AC signal, the second node is connected to a ground potential, and the first impedance component is between the second node and the fourth node. Connected, and the electronic device control method further includes, in the first circuit, differentially amplifying the signal of the fourth node and the signal of the third node to generate the first detection signal.

According to an embodiment of the present disclosure, the first impedance component is connected between the second node and the fourth node, and the second impedance element is connected between the first node and the fourth node, and the first impedance component is A third impedance element is connected between the first node and the third node, the fourth impedance element is connected between the second node and the third node, and the earphone has a first resistance component and a first inductance component , Wherein the second impedance element includes a second resistor, the third impedance element includes a third resistor and a third capacitor connected in parallel with the third resistor, and the fourth impedance element comprises a fourth resistor. Including, the first resistance component and the fourth resistor have the same size of the resistance component, the second resistor and the third resistor have the same size of the resistance component, and the third capacitor is the {first inductance component/( Resistance component of the third resistor * Resistance component of the fourth resistor)} has a power storage component of a size.

According to an embodiment of the present disclosure, the first impedance component is connected between the second node and the fourth node, and the second impedance element is connected between the first node and the fourth node, and the first impedance component is A third impedance element is connected between the first node and the third node, the fourth impedance element is connected between the second node and the third node, and the first impedance component is the second node and the A 1-1 resistance component and a first inductance component connected in series between a fourth node, and a 1-2 resistor connected in parallel with a 1-1 resistance component and a first inductance component between the second node and the fourth node Component, the second impedance element includes a second resistor, and the third impedance element includes a third resistor and a third capacitor connected in parallel between the first node and the third node, and The fourth impedance element includes a 4-1 resistor, a 4-2 resistor, and a fourth capacitor connected in parallel between the second node and the third node.

According to an embodiment of the present disclosure, the first-first resistance component and the fourth-first resistance have the same size of the resistance component, and the second resistance and the third resistance have the same size of the resistance component, and the first The size of the 1-2 resistance component and the resistance component of the 4-2 resistor are the same, and the third capacitor is the size of the {first inductance component/(resistance component of the third resistor * the resistance component of the 4-1 resistor)}} It has a power storage component.

According to an embodiment of the present disclosure, the first circuit includes a band pass filter and an envelope detector, and the electronic device control method comprises: a node connected to the first analog element in the first circuit Generating a second intermediate detection signal modulated with the band pass filter and the envelope detector by the first intermediate detection signal, and the first including the amplitude fluctuation component signal and the DC component signal generated from the second intermediate detection signal. Generating a detection signal, generating heart rate information from the amplitude fluctuation component signal, and generating the body temperature information from the direct current component signal.

According to an embodiment of the present disclosure, the electronic device control method includes receiving an electrical audio signal corresponding to an audio signal output through the earphone, and processing the audio signal with a high-pass filter, and And applying to at least one node of one circuit.

According to an embodiment of the present disclosure, the electronic device control method may include, in the first circuit, an in-phase signal of an in-phase component and an orthogonal phase from an intermediate detection signal of a node connected to the first AC signal and the first analog element. Generating the first detection signal including a component orthogonal signal, generating an amplitude component amplitude signal and a phase component phase signal from the in-phase signal and the orthogonal signal, and using the amplitude signal and the phase signal The method further includes removing motion components of the electronic device.

According to an embodiment of the present disclosure, the electronic device control method may include, in the first circuit, an in-phase signal of an in-phase component and an orthogonal phase from an intermediate detection signal of a node connected to the first AC signal and the first analog element. Generating the first detection signal including a quadrature signal of a component, generating an amplitude signal of an amplitude component and a phase signal of a phase component from the in-phase signal and the quadrature signal, and of the amplitude signal or the phase signal And detecting wearing or detachment of the electronic device based on at least one change amount.

According to embodiments of the present disclosure, by obtaining biometric information using an earphone, an effect of providing an apparatus and method for a user to obtain biometric information without performing a separate operation for collecting biometric information There is.

In addition, according to embodiments of the present disclosure, while outputting audio through the earphone, it is possible to provide an apparatus and method capable of obtaining biometric information through the earphone.

1 is a diagram illustrating an electronic device and a human ear structure according to an embodiment of the present disclosure.
2 is a block diagram of an electronic device according to an embodiment of the present disclosure.
3 is a diagram illustrating an equivalent circuit of a first impedance component, a first circuit, and a signal generator according to an embodiment of the present disclosure.
4 is a block diagram illustrating an electronic device according to an embodiment of the present disclosure.
5 is a diagram showing the structure of a processor according to an embodiment of the present disclosure.
6 is a diagram illustrating a processor according to another embodiment of the present disclosure.
7 is an example 710 of a waveform showing a time change of the amplitude A generated by the processor according to an embodiment of the present disclosure, and a waveform showing a time change of the phase θ generated by the processor An example 720 is shown.
8 shows an example 810 of the spectrum of amplitude A generated by the processor and an example 820 of the spectrum of phase θ generated by the processor in one embodiment of the present disclosure.
9 is an example 910 of a waveform showing a change in time of the amplitude A after passing through the detection filter of the processor according to an embodiment of the present disclosure, and the phase θ after passing through the detection filter of the processor An example 920 of a waveform representing a change in time is shown.
10 is an example of a spectrum of amplitude (A) after passing through a detection filter of a processor according to an embodiment of the present disclosure (1010), and an example of a spectrum of phase (θ) after passing through a detection filter of a processor (1020).
11 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.
12 is a circuit diagram schematically illustrating an analog circuit 1110 according to another embodiment of the present disclosure.
13 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.
14 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.
15 is a block diagram illustrating an example of an electronic device according to another embodiment of the present disclosure.
16 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.
Fig. 17 shows an example 1710 of the waveform of the pulse detection signal output from the processor of the electronic device when the audio signal is not output from the audio player, and when the audio signal is output from the audio player, the electronic device An example 1720 of the waveform of the detection signal of the pulse output from the processor is shown.
18 shows an analog circuit according to another embodiment of the present disclosure.
19 and 20 are views for explaining an analog circuit according to the embodiment of FIG. 18.
21 shows an analog circuit 2110 according to another embodiment of the present disclosure.
22 is a diagram showing amplitude and phase information of a detection signal according to another embodiment of the present disclosure.
23 is a diagram showing the structure of a processor according to another embodiment of the present disclosure.
24 is a diagram showing the structure of a processor according to another embodiment of the present disclosure.
25 shows a structure of a motion compensation unit according to an embodiment of the present disclosure.
26 illustrates a structure of a motion compensation unit according to another embodiment of the present disclosure.
FIG. 27 shows the result of removing the motion component by the motion correction unit 2304b shown in FIG. 26.
28 shows an example of the DC component removal units 2302a and 2302b according to an embodiment of the present disclosure.
29 shows the waveform of the amplitude component A before the DC component is removed, and the waveform of the amplitude component dA from which the DC component is removed.
30 shows another result of removing the DC component by the DC component removal units 2302a and 2302b.
31 illustrates a structure of a processor according to another embodiment of the present disclosure.
FIG. 32 is a diagram showing a time change of the amplitude component A generated by the processor when the subject is wearing the earphone.
33 is a diagram showing a time change of the phase component θ generated by the processor when the subject is wearing the earphone.
Fig. 34 shows an example of the result of time-differentiating the amplitude component (A).
35 shows an example of a result of time-differentiating the phase component θ.
36 is a diagram for describing threshold value processing of differential amplitude values.
37 is a diagram for explaining threshold value processing of differential phase values.
38 illustrates a structure of a processor according to another embodiment of the present disclosure.
39 shows the temporal change of the amplitude component (A) generated by the processor when the subject detaches the earphone from the outer ear canal.
40 shows an example of the result of time-differentiating the amplitude component (A).
41 shows the temporal change of the phase component θ generated by the processor when the subject removes the earphone.
Fig. 42 shows the AC component of the phase component θ when the subject is wearing the earphone.
Fig. 43 shows the AC component of the phase component θ when the subject is not wearing the earphone.
44 shows the height of the digitized wave of the AC component of the phase component θ.
45 is a flowchart illustrating a method of controlling an electronic device according to an embodiment of the present disclosure.
46 is a diagram illustrating a configuration of an electronic device according to an embodiment of the present disclosure.

This specification describes and discloses the principles of the embodiments so as to clarify the scope of claims and enable those skilled in the art to practice the embodiments described in the claims. The disclosed embodiments can be implemented in various forms.

The same reference numerals refer to the same components throughout the specification. This specification does not describe all elements of the embodiments, and the general contents or overlapping contents between embodiments in the technical field to which the embodiments of the present disclosure pertain are omitted. The term “module” or “unit” used in the specification may be implemented by one or more combinations of software, hardware, or firmware, and a plurality of “modules” or “parts” may be used according to embodiments. It may be implemented as an element of, or one "module" or "unit" may include a plurality of elements.

In describing the embodiments, when it is determined that detailed descriptions of related known technologies may unnecessarily obscure the subject matter of the present disclosure, detailed descriptions thereof will be omitted. In addition, the numbers used in the description process of the specification (eg, first, second, etc.) are only identification numbers for distinguishing one component from other components.

In addition, in this specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected to the other component, or may be directly connected, but in particular It should be understood that, as long as there is no objection to the contrary, it may or may be connected via another component in the middle.

The blocks and various processing blocks in processors 140, 140a, 140b, 140c, 140d, 140e, and 140f in the present disclosure may correspond to at least one software processing block or at least one dedicated hardware processor, and combinations thereof. have. The blocks defined in the processors 140, 140a, 140b, 140c, 140d, 140e, and 140f in this disclosure are only examples of software processing units for performing embodiments of the present disclosure, and various methods other than the processing units disclosed in the present disclosure As a processing unit for performing embodiments of the present disclosure may be defined.

Hereinafter, an operating principle and various embodiments of the embodiments of the present disclosure will be described with reference to the accompanying drawings.

1 is a diagram illustrating an electronic device and a human ear structure according to an embodiment of the present disclosure.

The electronic device 100 according to embodiments of the present disclosure is implemented in a form including an earphone 110. The electronic device 100 may be implemented, for example, in the form of a wearable device including the earphone 110. The electronic device 100 may be implemented in the form of, for example, a wireless earphone, a wired earphone, a head mounted display, or smart glasses. The electronic device 100 has a shape that is inserted into the ear canal 10 of the human ear. The electronic device 100 may acquire various biometric information 30 by using the earphone 110 and the first circuit electrically connected to the impedance component of the earphone 110.

The biometric information 30 is information related to a living body of a user wearing the electronic device 100. The biometric information 30 may be obtained by the interaction of the living body with the electronic device 100. The biometric information 30 may include, for example, at least one of heart rate or body temperature, or a combination thereof.

The electronic device 100 according to the embodiments of the present disclosure detects biometric information of a wearer (subject) of the earphone 110 by measuring a change in impedance of the earphone 110. The earphone 110 is connected to the first circuit of the embodiments of the present disclosure. The earphone 110 has a first impedance component, and the first impedance component and the first circuit may be implemented to constitute a voltage distribution circuit. Specifically, the equivalent circuit of the earphone 110 is constituted by an electric system circuit (Electrical　Circuit), a mechanical system circuit (Mechanical　Circuit), and an acoustic system circuit (Acoustical　Circuit). The circuits are working together.

When the earphone 110 is mounted on the subject's outer ear canal 10, since the pressure in the ear canal 20 changes due to pulsation in the body, the acoustic impedance of the acoustic system circuit of the earphone 110 changes. By doing so, the impedance of the electric system circuit changes. Accordingly, according to embodiments of the present disclosure, by inputting an AC signal having a predetermined frequency as a driving signal voltage to the electric circuit of the earphone 110, and measuring the current generated in the electric circuit of the earphone 110 , Detect the change in impedance of the electric circuit.

In addition, when the temperature of the entire earphone 110 mounted on the subject's ear changes due to a change in body temperature, the resistance value of the impedance of the electric system circuit changes. Accordingly, according to embodiments of the present disclosure, a change in time averaged by fluctuation of the impedance of the electric circuit of the earphone 110 mounted on the subject's ear is measured, and the change in time of the impedance of the earphone 110 By converting into a time change of temperature, a change in body temperature of the subject is detected.

According to embodiments of the present disclosure, biometric information may be detected non-invasively. Further, according to embodiments of the present disclosure, the user may collect biometric information by simply inserting the electronic device 100 into the external auditory meatus 10. Since the user inserts the electronic device 100 into the external auditory meatus 10 according to his/her needs, the user does not need to perform a separate operation for collecting biometric information. Accordingly, embodiments of the present disclosure have the effect of non-invasively collecting biometric information without requiring additional action from the user.

2 is a block diagram of an electronic device according to an embodiment of the present disclosure.

The electronic device 100 according to an embodiment of the present disclosure may include an earphone 110, a first circuit 120, a signal generator 130, and a processor 140.

The earphone 110 converts and outputs an electrical signal into a sound wave signal. The earphone 110 may convert an electrical signal into a sound wave signal by operating a diaphragm. The earphone 110 may be referred to as an earphone receiver, and may be implemented in the form of, for example, a crystal receiver or a magnetic receiver. The crystal receiver operates the diaphragm using the piezoelectric effect of the crystal element, and the magnetic receiver operates the diaphragm by passing a current corresponding to an audio signal to the coil.

The earphone 110 according to an embodiment of the present disclosure may include a first impedance component. The first impedance component represents the sum of impedance components represented by analog elements, electric wires, and the like in the earphone 110. The first impedance component may be represented by a resistance component and an inductance component.

The first circuit 120 includes at least one first analog element, and is electrically connected to the first impedance component of the earphone 110. The first analog device may include at least one of a resistor, an inductor, or a capacitor, or a combination thereof. The first analog element may have an impedance component. According to an embodiment, the first circuit 120 may include a plurality of first analog elements, and the plurality of first analog elements may be connected in series or parallel to form various circuit structures. The first analog element may be electrically connected to the first impedance component of the earphone 110 to configure a resistance division circuit to which voltage is divided and applied to the first analog element and the first impedance component, respectively. The first circuit 120 may receive the first AC signal from the signal generator 130 through a predetermined node, and the voltage of the first AC signal may be divided between the first impedance component and the first analog element. At this time, the voltage of the first AC signal is divided according to the ratio of the impedance component of the first analog element and the first impedance component, and may be applied to both ends of the first analog element and the first impedance component, respectively.

The first circuit 120 outputs a first detection signal including a voltage component corresponding to the first impedance component. The first impedance component of the earphone 110 may be changed by a bio signal. For example, the pulse wave signal due to the heartbeat is transmitted to the vibration plate of the earphone 110, so that the first impedance component may be changed in conjunction with the pulse wave signal. As another example, the first impedance component of the earphone 110 may be changed by body temperature. The first circuit 120 is electrically connected to the first impedance component and outputs a first detection signal related to the magnitude of the first impedance component. When the first impedance component is changed by the biological signal, the value of the first detection signal also changes corresponding to the change amount of the first impedance component. Accordingly, the processor 140 may obtain the biometric information by detecting a change amount of the first impedance component from the first detection signal.

The first circuit 120 includes an analog-to-digital converter, and converts the detection signal of the first circuit 120 into analog-to-digital conversion to generate a first detection signal in digital form and outputs it to the processor 140.

The first circuit 120 is electrically connected to the electric circuit of the earphone 110 and may be provided on the substrate. The first circuit 120 may be implemented in the form of, for example, a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

The signal generator 130 generates a first AC signal having a first frequency. The signal generator 130 may, for example, generate a first AC signal having a first frequency by using a frequency modulation circuit, a voltage division circuit, or the like.

According to an embodiment, the first frequency may correspond to a frequency range exceeding about 20 kHz as a frequency in the ultrasonic range. Embodiments of the present disclosure can prevent the noise caused by the first AC signal from being output to the earphone 110 by using a frequency signal in the ultrasonic range that exceeds the maximum audible human hearing range.

According to an embodiment, the first frequency may have a frequency of 20 kHz to 40 kHz. The first circuit 120 converts a predetermined signal by an analog-to-digital converter. Also, the signal in the first circuit 120 has a first frequency of the first AC signal. However, in the case of analog-to-digital conversion, sampling of the signal should be performed at a frequency that is twice or more of the first frequency. If the first frequency exceeds 40 kHz, it is difficult to implement an analog-to-digital converter. Therefore, according to an embodiment of the present disclosure, the first frequency is set to 40 kHz or less, thereby facilitating the configuration of the first circuit 120.

The processor 140 controls overall operation of the electronic device 100. The processor 140 may include one or more processors 140. The processor 140 may execute a predetermined operation by executing an instruction or command stored in a memory (not shown). The processor 140 may control whether the signal generator 130 outputs the first AC signal, the strength of the first AC signal, and the frequency of the first AC signal.

The processor 140 receives the first detection signal from the first circuit 120 and generates at least one biometric information. The first detection signal may have a magnitude component and a phase component, and the magnitude component and phase component of the first detection signal may be changed according to the biosignal. The processor 140 may obtain biometric information by extracting a magnitude component and a phase component from the first detection signal. For example, the processor 140 may obtain body temperature information from the magnitude component of the first detection signal and heart rate information from the phase component of the first detection signal.

According to an embodiment of the present disclosure, the electronic device 100 may further include an output unit (not shown). The output unit outputs biometric information generated by the processor 140. The output unit may correspond to, for example, a display or communication unit.

According to an embodiment, the output unit corresponds to the communication unit, and the electronic device 100 may transmit biometric information to the external device through the output unit. For example, the electronic device 100 may transmit biometric information to the smartphone while communicating with the main device, the smartphone. As another example, the electronic vehicle 100 may transmit biometric information to a server while communicating with an external server.

According to an embodiment, the electronic device 100 may output biometric information through the earphone 110. The processor 140 may convert biometric information into audio data and output biometric information through the earphone 110. For example, the processor 140 may generate heart rate information, heart rate abnormality information, body temperature information, body temperature abnormality information, and the like, and output it to the earphone 110.

According to an embodiment, the output unit corresponds to a display, and the electronic device 100 may output biometric information through the output unit. When the electronic device 100 is implemented in the form of a head-mounted display, a smart glass, etc., the processor 140 generates biometric information or biometric signal anomaly information as visual information, and biometric information through a graphical user interface (GUI) Alternatively, the biosignal anomaly information may be output.

3 is a diagram illustrating an equivalent circuit of a first impedance component, a first circuit, and a signal generator according to an embodiment of the present disclosure.

Earphone 110 includes a first impedance component 310. The first impedance component 310 may have a resistance component of R1 and an impedance variation amount component of Δr. The amount of impedance change can be caused by a biosignal.

The first circuit 120 includes at least one first analog element 320. The first analog element 320 may include an impedance component. For example, the first analog element 320 may include a resistance component R2. The first analog element 320 may include one or more analog elements, and may have an impedance component by one or more analog elements.

The signal generator 130 generates and outputs a first AC signal ei having a first frequency. The first AC signal ei has an AC voltage having a predetermined amplitude. The first AC signal ei may be input to the first node N330 of the first circuit 120. In addition, the signal generator 130 generates a first AC signal vibrating around a predetermined ground potential, and the first impedance component 310 may be connected to a predetermined ground potential at one end. That is, one end of the signal generating unit 130 and one end of the first impedance component 310 may have the same electrical potential, and may correspond to the same electrical node. The other end of the first impedance component 310 may be connected in series with the first analog element 320. Due to this, the voltage of the first AC signal ei may be applied to both ends of a circuit in which the first impedance component 310 and the first analog element 320 are connected in series.

The first impedance component 310 and the first analog element 320 constitute a voltage division circuit. For this reason, the voltage applied to both ends of the voltage dividing circuit, the second node N332 between the first impedance component 310 and the first analog element 320 is the first impedance component 310 based on the ground potential. It has a voltage ed corresponding to. The electronic device 100 may detect the first impedance component 310 and detect the impedance change amount Δr by detecting the voltage of the second node N332.

4 is a block diagram illustrating an electronic device according to an embodiment of the present disclosure.

The electronic device 100 according to an embodiment of the present disclosure includes an earphone 110, a first circuit 120a, a signal generator 130, and a processor 140, as illustrated in FIG. 3. . The first circuit 120a includes a DAC (Digital　Analog　Converter) 410, a first analog element 320, an amplifier 412, a band pass filter (BPF; Band　Pass　Filter) 414, and an ADC (Analog　Digital　Converter). 416, and orthogonal demodulator 420. In addition, the electronic device 100 according to an embodiment of the present disclosure includes an analog circuit 430 that includes the first analog element 320 and the first impedance component 310 of the earphone 110. . The first analog element 320 has a fixed impedance component. The first analog element 320 is a circuit composed of at least one of a fixed resistor, a fixed inductor, or a fixed capacitor, or a combination thereof.

The signal generator 130 generates an AC signal cos(2π*fi*t) having a predetermined frequency (fi) as a driving signal voltage input to the electric circuit of the earphone 110 (where t is time ( Seconds). In addition, the AC signal generated by the signal generator 130 is input to the analog circuit 430 through the DAC 410.

Here, the predetermined frequency (fi) may be a frequency of 20kHz or more. When the predetermined frequency (fi) is a frequency of 20 kHz or higher, since the sound having the predetermined frequency is generally ultrasonic that is hardly heard by humans, the function of providing the audio of the earphone 110 is not impaired, and the biometric information Can be detected. Further, it is preferable that the predetermined frequency (fi) is 40 kHz or less. Since the sampling frequency of the ADC 416, which will be described later, should be at least twice the predetermined frequency (fi), if the predetermined frequency (fi) exceeds 40 kHz, the sampling frequency twice the predetermined frequency (fi) It is difficult to realize the ADC 416.

The DAC 410 digitally-analogizes the AC signal generated by the signal generator 130 and inputs it to the analog circuit 430.

As shown in FIG. 3, the analog circuit 430 includes a first analog element 320 connected in series with the first impedance component 310 of the earphone 110. Then, the first AC signal generated by the signal generation unit 130 and converted into an analog signal by the DAC 410 is input to the first impedance component 310 through the first analog element 320. Here, the voltage of the first AC signal is e _i , the impedance of the first impedance component 310 of the earphone 110 is R1, and the amount of change in impedance of the first impedance 310 by detecting the biosignal is Δr, and the impedance of the first analog element 320 is R2, the voltage (e _d ) at the b-point of the input terminal of the earphone 110 is as shown in Equation 1.

Here, assuming R1=R2, the voltage e _d is represented by Equation (2).

In addition, since the impedance change amount Δr of the first impedance component 310 by detecting the biosignal is very small compared to the original impedance R1 of the earphone 110, the voltage e _d is represented by Equation (3). .

That is, the voltage e _d changes in proportion to R1+Δr. Accordingly, the electronic device 100 according to an embodiment of the present disclosure, in order to detect the impedance change amount Δr caused from the biosignal, the impedance change amount caused by the original impedance R1 and the biosignal of the earphone 110 A voltage (e _d ) proportional to the sum of (Δr) is detected.

Specifically, the amplifier 412 first amplifies the voltage (e _d ) at the b point of the input terminal of the earphone 110, and inputs the amplified voltage to the band pass filter 414.

Subsequently, the band pass filter 414 sets a predetermined frequency (fi) as the center frequency, and removes noise other than the frequency (fi) from the voltage (e _d ). In addition, the band pass filter 414 removes noise, includes an impedance change amount Δr of the first impedance component 310, and inputs a voltage component proportional to R1+Δr to the ADC 416.

The ADC 416 performs analog-to-digital conversion of a voltage component proportional to R1+Δr including the impedance change amount Δr, and inputs it to the orthogonal demodulator 420.

The orthogonal demodulator 420 includes a mixer 421, a low pass filter (LPF; Low 　 Pass 　 Filter) 1424, a 90° or higher 418, a mixer 422, and a low pass filter 426. In addition, the orthogonal demodulator 420 uses the AC signal cos(2π*fi*t) generated by the signal generator 130 as a local signal to generate a voltage component proportional to the signal R1+Δr output from the BPF 414. By orthogonal demodulation, an in-phase component I and an orthogonal phase component Q are generated.

Specifically, the mixer 421 mixes the AC signal cos(2π*fi*t) generated by the signal generator 130 with the signal output from the ADC 416 and inputs it to the low pass filter 424. The low pass filter 424 removes the high frequency component from the signal output from the mixer 421, and generates an in-phase component I.

In addition, the 90° shifter 418 shifts the phase of the AC signal cos(2π*fi*t) generated by the signal generator 130 by 90° and inputs it to the mixer 422. The mixer 422 mixes the AC signal sin(2π*fi*t) shifted by 90° phase shifted by the 90° phase shifter 418 to the signal output from the ADC 416 and inputs it to the low pass filter 426. The low pass filter 426 removes the high frequency component from the signal output from the mixer 422, and generates an orthogonal phase component Q.

5 is a diagram showing the structure of a processor according to an embodiment of the present disclosure.

According to one embodiment of the present disclosure, the processor 140a calculates the amplitude A and the phase θ from the in-phase component I and the quadrature phase component Q generated by the orthogonal demodulator 420, and the amplitude A and Biometric information is calculated using at least one of the phases θ. The processor 140a includes a body temperature information generator 510 and a heart rate information generator 530a. The body temperature generating unit 510 and the heart rate information generating unit 530a generate body temperature information from the in-phase component I and the quadrature component Q. The body temperature generation unit 510 includes an amplitude calculation unit 512, an average value calculation unit 514, and a body temperature calculation unit 516. The heart rate information generating unit 530a includes a phase calculating unit 532, a detection filter 534, a fast Fourier transform unit 536, a peak frequency detecting unit 538, and a pulse calculating unit 540. .

The amplitude calculator 512 calculates the amplitude A by adding the square of the in-phase component I and the square of the quadrature component Q, and calculating the square root. In addition, the average value calculating unit 514 calculates an average value of a relatively long period (for example, at least tens of seconds or more, and moisture in the case of a long period) of the amplitude A calculated by the amplitude calculating unit 512. The body temperature calculation unit 516 calculates the body temperature from the average value calculated by the average value calculation unit 514. Specifically, the body temperature calculation unit 516 calculates the body temperature using a first-order equation that uses the average value calculated by the average value calculation unit 514 as a variable. In addition, the integer of the said 1st formula is calculated|required by performing experiment beforehand.

Further, the phase calculator 532 calculates the phase θ by calculating an arc tangent (tan ^-1 (Q/I)) of a value obtained by dividing the orthogonal phase component Q by the in-phase component I. In addition, the detection filter 534 is a band pass filter having a frequency including a target bio signal (the pulse in the example shown in FIG. 5) as a center frequency, and the phase θ calculated by the phase calculator 532 ), the desired frequency (the frequency of the pulse in the example shown in Fig. 5) is emphasized. Also, the fast Fourier transform unit 536 converts the signal output from the detection filter 534 into a fast Fourier transform, and inputs it to the peak frequency detector 538. The peak frequency detection unit 538 detects a frequency fp having the largest power among signals input from the fast Fourier transform unit 536. Next, the pulse calculation unit 540 multiplies the frequency fp [Hz] detected by the peak frequency detection unit 538 by 60 to calculate the pulse rate (pulse rate) for one minute to calculate the heart rate per second.

6 is a diagram illustrating a processor according to another embodiment of the present disclosure.

The processor 140 according to the present embodiment includes a body temperature information generator 510 and a heart rate information generator 530b. The body temperature information generating unit 510 is the same as the embodiment disclosed in FIG. 5. The heart rate information generation unit 530b includes a phase calculation unit 532, a detection filter 534, a Schmitt trigger 610, an interval average calculation unit 620, and a pulse calculation unit 540. In FIG. 6, description of the same configuration as in FIG. 5 is omitted.

The Schmitt trigger 610 binarizes the signal output from the detection filter 534. Subsequently, the section average calculating unit 620 calculates the average value Ti obtained by averaging the waveform period of the signal binarized by the Schmitt trigger 610 in a predetermined time section (for example, a time section of about a few seconds to about 10 seconds). do. The pulse calculator 540 multiplies the inverse of the average value Ti [second] calculated by the section average calculator 620 by 60 to calculate a pulse (pulse frequency) for one minute.

)의 시간 변화를 나타내는 파형의 일 예(720)를 나타낸다. 7 is an example 710 of a waveform representing a time change in amplitude A generated by a processor according to an embodiment of the present disclosure, and a phase generated by the processor (

) Shows an example 720 of a waveform representing a time change.

Specifically, the vertical axis of the graph of FIG. 7 represents amplitude (A) or phase (θ), and the horizontal axis represents time (seconds).

8 shows an example 810 of the spectrum of amplitude A generated by the processor and an example 820 of the spectrum of phase θ generated by the processor in one embodiment of the present disclosure.

9 is an example 910 of a waveform showing a change in time of the amplitude A after passing through the detection filter of the processor according to an embodiment of the present disclosure, and the phase θ after passing through the detection filter of the processor An example 920 of a waveform representing a change in time is shown.

Specifically, the vertical axis in FIG. 9 represents amplitude (A) or phase (θ), and the horizontal axis represents time (seconds).

10 is an example of a spectrum of amplitude (A) after passing through a detection filter of a processor according to an embodiment of the present disclosure (1010), and an example of a spectrum of phase (θ) after passing through a detection filter of a processor (1020).

7 and 8, the data 720 and 820 related to the phase θ than the data 710 and 810 related to the amplitude A generated by the processors 140a and 140b see the pulse wave. It can be seen that it is clearly indicated.

Also, as shown in Figs. 9 and 10, the noise other than the center frequency is removed by the detection filter 534, so that the pulse wave is more clearly seen in the data 920 and 1020 related to the phase θ, and is faster. It can be seen that even after the Fourier transform, the component including the peak frequency is clearly displayed.

According to the electronic device 100 according to an embodiment of the present disclosure described above, the analog circuit 430 is configured to include an AC signal having a predetermined frequency (fi), including the impedance 310 of the earphone 110 By inputting as, the analog circuit 430 outputs a voltage including a voltage component corresponding to a change in impedance of the earphone 110. Accordingly, the biometric information can be calculated based on the amount of impedance change due to a biosignal such as a pulse wave or body temperature of the human body equipped with the earphone 110. Accordingly, the electronic device 100 according to an embodiment of the present disclosure may detect biometric information while providing a sound wave corresponding to an audio signal.

The frequency of the pulse wave is about several Hz, and its size is very small, making it difficult to detect. According to embodiments of the present disclosure, even if an amplifier having a high amplification factor at a frequency close to DC is not used, there is an effect capable of detecting the amount of impedance change due to the biological signal of the human body equipped with the earphone 110. For this reason, according to embodiments of the present disclosure, large coils and capacitors are not required to realize an amplifier having a high amplification factor. Accordingly, embodiments of the present disclosure can make the circuit small and simple.

In addition, according to embodiments of the present disclosure, since a predetermined frequency (fi) is a frequency of 20 kHz or more, ultrasonic waves of 20 kHz or more that a person cannot easily hear are input to the electric circuit of the earphone 110 through the analog circuit 430 It is possible to detect biometric information without compromising the function of providing the audio of the earphone 110.

Further, according to embodiments of the present disclosure, since the predetermined frequency fi is 40 kHz or less, it is possible to prevent the realization of the ADC 416 having a sampling frequency twice the predetermined frequency fi.

In addition, according to embodiments of the present disclosure, noise other than the frequency fi may be removed from the voltage e _d applied to the first impedance component 310 by the band pass filter 414. That is, the band pass filter 414 can input a voltage component proportional to R1+Δr including the amount of the impedance change (Δr) from which the noise has been removed, to the ADC 416, thereby increasing the SNR of the first detection signal. .

In addition, according to embodiments of the present disclosure, the analog circuit 430 is configured by using the first analog element 320 which is a fixed impedance component connected in series with the first impedance component 310 of the earphone 110. , It is possible to configure the analog circuit 430 by a simple configuration.

In addition, according to the embodiments of the present disclosure, by the orthogonal demodulator 420, the AC signal generated by the signal generator 130 as a local signal, the signal output from the band pass filter 414 is orthogonally demodulated, The in-phase component I and the quadrature phase component Q are generated, and the processor 140 calculates the amplitude A and the phase θ from the in-phase component I and the quadrature component Q, and at least one of the amplitude A and the phase θ. Biometric information is calculated using one. Accordingly, the biometric information may be calculated based on the impedance change amount Δr of the earphone 110.

Next, another embodiment of the first circuit of the present disclosure will be described with reference to FIGS. 11 and 12.

11 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure. 12 is a circuit diagram showing a simplified analog circuit 1110 according to another embodiment of the present disclosure.

The electronic device 100 according to another embodiment of the present disclosure includes an earphone 110, a first circuit 120b, a signal generator 130, and a processor 140, as shown in FIG. 11. . The first circuit 120b is composed of a DAC (Digital 　 Analog 　 Converter) 1120, 180° or more (1124), a DAC (Digital 　 Analog 　 Converter) 1122, and an analog circuit 1110, in the embodiment of FIG. It is different from the electronic device 100. Hereinafter, in the electronic device 100 according to the embodiment of FIGS. 11 and 12, the same reference numerals are given to the same configuration as the electronic device 100 according to the embodiment of FIG. 4, and description thereof is omitted.

As shown in FIG. 11, the AC signals generated by the signal generator 130 are transmitted through different paths, one is input to the DAC 1120, and the other is input to the above 1° 180°. . In addition, the DAC 1120 converts the AC signal generated by the signal generation unit 130 to digital-analog, and inputs it to the analog circuit 1110. In addition, the 180° shifter 1124 shifts the phase of the AC signal generated by the signal generator 130 by 180° and inputs it to the DAC 1122. The DAC 1122 digitally and analogly converts an AC signal with a 180° phase shift, and inputs it to the analog circuit 1110.

The analog circuit 1110 is a bridge circuit, as shown in FIG. 12. In addition, the bridge circuit includes a first impedance 310, a second impedance 1114, a third impedance 1116, and a fourth impedance 1112, which are impedances of the earphone 110. Each of the second impedance 1114, the third impedance 1116, and the fourth impedance 1112 corresponds to at least one analog element (eg, at least one of a resistor, a capacitor, or an inductor, or a combination thereof) You can. Also, the second impedance 114, the third impedance 1116, and the fourth impedance 1112 are fixed impedances. A fixed impedance is a circuit composed of at least one of a fixed resistor, a fixed inductor, or a fixed capacitor, or a combination thereof.

When the voltage of the first AC signal is e _i , the half value of the AC signal + e _i /2 from the signal generator 130 is a first node (a node) between the first impedance 310 and the fourth impedance 1112. ), and the half-e _i /2 of the inverted signal in which the phase of the AC signal is inverted is input to the second node (b node) between the second impedance 1114 and the third impedance 1116. Accordingly, a sinusoidal voltage of amplitude e _i is input between the a node and the b node of the corresponding bridge circuit.

Here, the impedance of the first impedance 310, which is the impedance of the earphone 110, is set to R1, the amount of change in the impedance of the first impedance 310 by detecting a biosignal is set to Δr, and the second impedance 1114 If the impedance of) is R2, the impedance of the third impedance 1116 is R3, and the impedance of the fourth impedance 1112 is R4, the voltage Δe between the c node and the d node of the bridge circuit is , Equation 4 appears.

Here, assuming that R4 = R1 and R3 = R2, the voltage Δe is expressed by the following equation (5).

In addition, since the impedance change amount Δr of the first impedance 310 by detecting the biosignal is very small compared to the original impedance R1 of the earphone 110, the voltage Δe is expressed by the following equation (6). .

That is, the voltage Δe changes in proportion to Δr. Accordingly, the electronic device 100 according to another embodiment of the present disclosure detects a voltage Δe proportional to Δr derived from a biosignal.

Specifically, the amplifier 412 first amplifies the voltage Δe between the c node and the d node of the bridge circuit, and inputs the amplified voltage Δe to the band pass filter 414.

Subsequently, the band pass filter 414 sets a predetermined frequency (fi) as the center frequency, and removes noise other than the frequency (fi) from the voltage (Δe). Then, the band pass filter 414 inputs the Δe from which the noise is removed to the ADC 416. Next, in the ADC 416, the Δe is converted to a digital signal, and the quadrature demodulator 420 generates an in-phase component I and a quadrature component Q. Next, the processor 140 calculates the biometric information based on the in-phase component I and the quadrature component Q.

According to the electronic device 100 according to another embodiment of the present disclosure described above, the same effect as that of the electronic device 100 according to FIG. 4 is obtained, and the analog circuit 1110 is a bridge circuit. A voltage Δe proportional to one impedance change amount Δr is input to the band pass filter 414, and biometric information can be detected with higher accuracy.

Specifically, in the electronic device 100 according to FIG. 4, a voltage proportional to the sum of the original impedance R1 of the earphone 110 and the impedance change amount Δr due to the bio signal in the band pass filter 414 ( e _d ) was entered. In addition, since the impedance change amount Δr is very small compared to the original impedance R1 of the earphone 110, the change amount of the voltage e _d accompanying the change in Δr becomes very small, and there is a problem that detection sensitivity is low. Meanwhile, in the electronic device 100 according to FIGS. 11 and 12, a voltage Δe proportional to only the impedance change amount Δr due to the bio-signal is input to the band pass filter 414, so that the change and voltage of Δr ( Since the amount of change in Δe becomes the same, biometric information can be detected with higher accuracy.

Next, another embodiment of the present disclosure will be described with reference to FIG. 13.

13 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.

The electronic device 100 according to another embodiment of the present disclosure includes, as shown in FIG. 13, a configuration of the differential amplifier 1322 and the analog circuit 1310, with the electronic device 100 according to FIG. 4. different. Hereinafter, in the electronic device 100 according to another embodiment of the present disclosure, the same reference numerals are given to the same configuration as the electronic device 100 according to the embodiment of FIG. 4, and the description thereof is omitted.

As shown in FIG. 13, the first AC signal generated by the signal generator 130 is input to the DAC 410. In addition, the DAC 410 digitally-analogizes the first AC signal generated by the signal generator 130 and inputs it to the analog circuit 1310.

The analog circuit 1310 is a bridge circuit, as shown in FIG. 13. In addition, the bridge circuit includes a first impedance 310, a second impedance 1312, a third impedance 1314, and a fourth impedance 1316, which are impedances of the earphone 110.

Also, the second impedance 1312, the third impedance 1314, and the fourth impedance 1316 are fixed impedances. In addition, the fixed impedance is a circuit composed of at least one of a fixed resistor, a fixed inductor, or a fixed capacitor, or a combination thereof.

In addition, when the voltage of the first AC signal is e _i , the voltage e _i of the AC signal from the signal generator 130 is a first node (a node) between the second impedance 1312 and the third impedance 1314. Is input, the second node (node b) between the first impedance 310 and the fourth impedance 1316 is grounded. Accordingly, a sinusoidal voltage of amplitude e _i is input between the a node and the b node of the bridge circuit.

In addition, like the analog circuit 1110 according to the embodiment of FIGS. 11 and 12, the voltage Δe between the c node and the d node of the analog circuit 1310 according to the embodiment of FIG. 13 detects a biosignal. It changes in proportion to the amount of change (Δr) of the impedance of the first impedance 310. Accordingly, the electronic device 100 according to another embodiment of the present disclosure detects a voltage Δe proportional to Δr derived from a biosignal.

Specifically, the differential amplifier 1322 has an input voltage of the c node between the second impedance 1312 and the first impedance 310, and an input of the d node between the third impedance 1314 and the fourth impedance 1316. Δe is detected by taking the difference from the voltage. The differential amplifier 1322 amplifies the Δe and inputs it to the band pass filter 414. Subsequent processing is the same as that of the embodiment of Fig. 11, and thus description thereof is omitted.

According to the electronic device 100 according to another embodiment of the present disclosure described above, the same effect as that of the electronic device 100 according to FIGS. 11 and 12 is obtained, as well as the first signal from the signal generator 130 Since the AC signal is input between the second impedance 1312 and the third impedance 1314, and the first impedance 310 and the fourth impedance 1316 are grounded, one AC signal from the signal generator 130 Is input to the bridge circuit of the analog circuit 1310. Accordingly, in the electronic device 100 according to the embodiment of FIG. 11, two AC signals of half value +e _i /2 of the AC signal and half value of the inverted signal -e _i /2 of the inverted signal of the AC signal are inverted. Compared to the case of input to the bridge circuit of the analog circuit 1110, another embodiment of the present disclosure does not require adjustment to adjust the phase so that the phase difference between the two AC signals is exactly 180°, so it is easier and more accurate. As a result, biometric information can be detected.

Next, another embodiment of the present disclosure will be described with reference to FIG. 14.

14 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.

The electronic device 100 according to the present embodiment, as shown in FIG. 14, includes an envelope detection unit 1416, a capacitor 1418, an amplifier 1420, and an ADC (Analog　Digital　Converter) in the first circuit 120d. (1422) The configuration of the pulse calculator 405 as a biometric information calculator, a low-pass filter (LPF) 406, and an ADC 1426 is different from the embodiment in FIG. Further, in the present embodiment, the first detection signal input to the processor 140 is different from the embodiment of FIG. 4. For this reason, the operation of the heart rate calculator 1430 and the body temperature calculator 1432 of the processor 140 is different from the processor 140 of the embodiment of FIG. 4. Hereinafter, in the electronic device 100 according to the embodiment of FIG. 14 of the present disclosure, the same reference numerals are given to the same configuration as the electronic device 100 according to the embodiment of FIG. 4, and description thereof is omitted.

In the electronic device 100 according to the embodiment of FIG. 4, the signal e _d input from the analog circuit 430 to the band pass filter 414 through the amplifier 412 is a voltage proportional to Δr derived from the biosignal. In addition to the components, a voltage component proportional to the impedance R1 of the original first impedance component of the earphone 110 is included. In addition, since the impedance change amount Δr among the first impedance components is very small compared to the original impedance R1 of the earphone 110, the change amount of the voltage e _d accompanying the change in Δr becomes very small, and the detection sensitivity is high. There was a low problem.

Therefore, in the electronic device 100 according to the present embodiment, the envelope detection unit 1416 first detects the envelope of the signal output from the band pass filter 414. The envelope detector 1416 separates the voltage fluctuation ed at node b into the envelope and divides it into amplitude fluctuation component ΔA and DC component DC. According to an example, the envelope detection unit 1416 receives an AC signal such as 1442 and outputs a signal representing the envelope of the input signal 1442, such as 1444. The signal output from the envelope detector 1416 is transmitted in two passes.

In one pass, the capacitor 1418 removes the DC component of the envelope detection signal output from the envelope detection unit 1416. The DC component of the envelope detection signal corresponds to a voltage component proportional to the original impedance R1 of the earphone 110. Accordingly, the DC component of the envelope detection signal is removed by the capacitor 1418, so that a voltage component proportional to the amount of change in impedance Δr derived from the biological signal is extracted from the envelope detection signal. In addition, the signal output from the capacitor 1418 is amplified by the amplifier 1420, and converted to a digital signal by the ADC 1422. Then, the signal output from the ADC 1422 corresponds to the amplitude A generated in the processor 140 of the embodiment of FIG. 4. 7 and 8, the phase θ shows a pulse wave better than the amplitude A generated by the processor 140, and according to this embodiment, the amplitude (instead of the phase θ) A) can also be used to calculate the pulse rate in the same way. The heart rate calculator 1430 calculates a pulse based on a signal output from the ADC 1422 using the same method as the processor 140 according to the embodiment of FIG. 4.

In another pass, the low pass filter 1424 transmits the direct current component of the envelope detection signal output from the envelope detection unit 1416. As described above, the DC component of the envelope detection signal corresponds to a voltage component proportional to the original impedance R1 of the earphone 110. For example, when the body temperature of the subject equipped with the earphone 110 is changed, the temperature of the entire earphone 110 is also changed, and the original impedance R1 of the earphone 110 is also changed. Accordingly, biometric information such as body temperature can be detected based on the DC component of the envelope detection signal output from the envelope detection unit 1416 corresponding to a voltage component proportional to the original impedance R1 of the earphone 110.

Specifically, the DC component of the envelope detection signal output from the low pass filter 1424 is converted into a digital signal by the ADC 1426. In addition, the signal output from the ADC 1426 corresponds to an average value of a relatively long period (eg, at least tens of seconds or more, and a moisture in the case of long) of the amplitude A generated in the processor 140 of the embodiment of FIG. 4. Accordingly, the body temperature calculator 408 calculates body temperature based on the signal output from the ADC 1426 using the same method as the processor 140 according to the embodiment of FIG. 4.

According to the electronic device 100 according to another embodiment of the present disclosure described above, the same effect as that of the electronic device 100 according to the embodiment of FIG. 4 is obtained, as well as the envelope detection signal by the capacitor 1418 Since the direct current component of is removed, the impedance change amount Δr due to the biological signal of the earphone 110 can be extracted to calculate the biological information. Accordingly, biometric information can be detected with higher precision.

In addition, since the DC component of the envelope detection signal is extracted by the low-pass filter 1424, biometric information can be calculated based on the change in the DC component due to the biological signal.

Next, another embodiment of the present disclosure will be described with reference to FIG. 15.

15 is a block diagram illustrating an example of an electronic device according to another embodiment of the present disclosure.

The electronic device 100 according to another embodiment of the present disclosure includes a high-pass filter (HPF; High-pass filter) 1510 as shown in FIG. 15. And the electronic device 100 according to the embodiment of FIG. 14. Hereinafter, in the electronic device 100 according to another embodiment of the present disclosure, the same reference numerals are given to the same configuration as the electronic device 100 according to the embodiment of FIG. 4, and the description thereof is omitted. Further, in the electronic device 100, the analog circuit 1520 corresponds to the analog circuits 430, 1110, and 1310 of FIGS. 4, 11, 13, and 14.

The high pass filter 1510 has a cutoff frequency of a predetermined frequency (fi) and transmits a frequency higher than the predetermined frequency (fi). In addition, an audio signal output from an audio player such as an audio device is input to the earphone 110 through the high pass filter 1510. That is, the high pass filter 1510 inputs an audio signal from which frequency components below a predetermined frequency (fi) are removed to the earphone 110. The audio signal means an electrical analog signal representing audio data. The audio signal is input to the earphone 110, and the earphone 110 converts the audio signal into a sound wave signal and outputs it.

Here, as in the embodiment of FIG. 4, the predetermined frequency (fi) is preferably a frequency of 20 kHz or higher, which is a lower limit frequency of ultrasonic waves that are generally difficult for humans to hear. When a predetermined frequency (fi) is a frequency of 20 kHz or higher, the high-pass filter 1510 may input the audio data signal from which ultrasonic noise, which is a noise component, is removed, to the earphone 110.

Further, the high pass filter 1510 removes frequency components below a predetermined frequency (fi) from the audio data signal. Accordingly, even if an audio data signal is input to the earphone 110 from an audio player such as an audio device, the first AC signal cos(2π*fi*t) having a predetermined frequency (fi) is earphoned through the analog circuit 1520. By inputting to the (110), it is possible to prevent the frequency component of the audio data signal from interfering with the process of detecting the impedance change amount (Δr) due to the biological signal of the earphone 110.

According to the electronic device 100 according to another embodiment of the present disclosure described above, the same effects as the electronic device 100 according to the embodiments of FIGS. 4, 11, 13, and 14 are obtained, of course , Corresponding to a frequency component below a predetermined frequency (fi) of the first AC signal generated by the signal generator 130 from the audio signal output from an audio player such as an audio device by the high pass filter 1510 The noise portion of the audio signal is removed. Accordingly, the detection of the amount of change (Δr) of the impedance due to the biological signal of the earphone 110 performed by inputting the first AC signal having the predetermined frequency (fi) to the analog circuit (1520) This frequency component can be prevented from interfering. Accordingly, according to the present embodiment, while providing the audio signal in the electronic device 100, it is possible to detect biometric information with higher precision.

On the other hand, since the frequency of the pulse wave is about several Hz, it is difficult to separate it from low-frequency components included in audio data such as sound and music. Therefore, when the present embodiment is not applied, it is difficult to detect biometric information such as pulse waves while providing an audio signal such as sound or music.

In addition, since the frequency of the pulse wave is about several Hz and is also weak, an amplifier having a high amplification factor is required at a frequency close to direct current. However, in order to realize such an amplifier, a large coil and a capacitor are required. In addition, since a capacitor cannot be used for inter-stage coupling of the low-frequency amplifying circuit, a voltage offset countermeasure of the amplifier is necessary, and the circuit is large and easily complicated.

This embodiment has been made in view of the above problems, and has an effect of providing an electronic device 100 capable of detecting biometric information while providing audio.

Next, another embodiment of the present disclosure will be described with reference to FIG. 16.

16 is a block diagram illustrating an example of an electronic device 100 according to another embodiment of the present disclosure.

In the electronic device 100 according to the present embodiment, as shown in FIG. 16, the configuration of the analog circuit 1610 is different from the electronic device 100 according to the embodiment of FIG. 13. Hereinafter, in the electronic device 100 according to the present embodiment, the same reference numerals are given to the same configuration as the electronic device 100 according to the embodiment of FIG. 13, and a description thereof will be omitted.

In addition, in the example shown in FIG. 16, an audio signal is input from an audio player 1612 such as an audio device to a right ear earphone and a left ear earphone, and the electronic device 100 is a right ear earphone. The change amount (Δr) due to the biosignal of the impedance 310a is detected. According to another embodiment, the electronic device 100 may detect a change amount Δr due to the biosignal of the impedance 310b of the left ear earphone. In this case, the analog circuit 1610 includes the impedance 310b of the left ear earphone instead of the impedance 310a of the right ear earphone. In addition, an audio signal is input from the audio player 1612 to the earphone 110 for convenience (also referred to as a monaural earphone), and the electronic device 100 is impedance caused by the biological signal of the earphone 110 for convenience. It is also possible to detect the change amount Δr. In this case, the analog circuit 1610 is configured to include the impedance of the earphone for convenience instead of the impedance 310a of the earphone for right use.

The analog circuit 1610 is a bridge circuit, as shown in FIG. 16. In addition, the bridge circuit includes a first impedance 310a, which is the impedance of a right ear earphone, a second impedance 1622, a third impedance 1624, and a fourth impedance 1626. Further, the second impedance 1622, the third impedance 1624, and the fourth impedance 1626 are fixed impedances. A fixed impedance is a circuit composed of at least one of a fixed resistor, a fixed inductor, or a fixed capacitor, or a combination thereof.

Then, when the voltage of the first AC signal is e _i , the voltage e _i of the AC signal from the signal generator 130 is a first node (a node) between the second impedance 1622 and the third impedance 1624. Is input, the first impedance 310a and the fourth impedance 1626 are grounded. That is, the node c of the bridge circuit is grounded through the first impedance 310a, and the node d of the bridge circuit is grounded through the fourth impedance 1626. Accordingly, a sinusoidal voltage of amplitude e _i is input between the node a of the bridge circuit and the ground points of the first impedance 310a and the fourth impedance 1626.

Also, in the same manner as the analog circuit 1310 according to the embodiment of FIG. 13, the voltage Δe between the c node and the d node of the analog circuit 1610 according to the present embodiment is the first impedance ( It changes in proportion to the impedance change amount (Δr) of 310a). Accordingly, the electronic device 100 according to the present embodiment detects a voltage Δe proportional to Δr derived from a biosignal.

Specifically, the differential amplifier 1322 has an input voltage of a node c between the second impedance 1622 and the first impedance 310a, and an input of a node d between the third impedance 1624 and the fourth impedance 1626. Δe is detected by taking the difference from the voltage. The differential amplifier 1322 amplifies the Δe and inputs it to the band pass filter 414. Since the subsequent processing is the same as the embodiment of Fig. 4, the embodiment of Fig. 11, etc., the description thereof is omitted.

In addition, in the present embodiment, the audio signal input from the audio player 1612 to the right ear earphone is input between the second impedance 1622 and the first impedance 310a, and the third impedance 1624 and the fourth. It is input between the impedances 1626.

Specifically, the electronic device 100 according to the present embodiment includes a first buffer 1614, a second buffer 1616, a first resistor R11, a second resistor R12, and a third resistor R13. Have more.

According to one embodiment, the first resistor R11, the second resistor R12, and the third resistor R13 have the same resistance value. Further, according to an embodiment, a capacitor or an inductor may be used instead of the first resistor R11, the second resistor R12, and the third resistor R13. Further, according to an embodiment, the first buffer 1614 and the second buffer 1616 are buffer circuits having the same configuration and the same characteristics, such as a voltage follower circuit.

The audio player 1612 outputs the analog audio signal for the right ear through the first buffer 1614 and the first resistor R11 or the second resistor R12 to the right ear earphone. In addition, the audio player 1612 outputs the analog audio signal for left use to the earphone for left use through the second buffer 1616 and the third resistor 1624. Further, the output side of the first resistor R11 is connected to the node c of the bridge circuit, and the output side of the second resistor R12 is connected to the node d of the bridge circuit. Accordingly, an audio signal input from the audio player 1612 to the right ear earphone is input between the second impedance 1622 and the first impedance 310a, and between the third impedance 1624 and the fourth impedance 1626. Is entered in. That is, an input voltage input from the second impedance 1622 and the first impedance 310a to the differential amplifier 1322, and a differential amplifier 1322 from the third impedance 1624 and the fourth impedance 1626. The audio signal is added to the input voltage.

In addition, the differential amplifier 1322 has an input voltage at the c node between the second impedance 1622 and the first impedance 310a, and an input voltage at the d node between the third impedance 1624 and the fourth impedance 1626. By taking the difference from the audio signal included in the input voltage between the second impedance 1622 and the first impedance 310a, and included in the input voltage between the third impedance 1624 and the fourth impedance 1626 Audio signals cancel each other out. Accordingly, since the voltage component derived from the audio signal is not included in the output of the differential amplifier 1322, biometric information can be detected with higher precision.

Fig. 17 shows an example 1710 of the waveform of the pulse detection signal output from the processor of the electronic device when the audio signal is not output from the audio player, and when the audio signal is output from the audio player, the electronic device An example 1720 of the waveform of the detection signal of the pulse output from the processor is shown. The vertical axis in Fig. 17 represents the phase, and the horizontal axis represents the time in seconds. In addition, the dashed-dotted line in Fig. 17 shows the waveform of the pulse detection signal.

As shown in FIG. 17, according to the electronic device 100 according to the embodiment of FIG. 16, even if an audio signal is output from the audio player 1612 to the right ear earphone, the impedance 310a of the right ear earphone is shown. It can be seen that biometric information such as a pulse can be detected to the same degree as when the audio signal is not output from the audio player 1612 to the right ear earphone based on the change amount Δr.

According to the electronic device 100 according to the embodiment of FIG. 16 described above, the same effect as that of the electronic device 100 according to the embodiment of FIG. 13 is obtained, as well as the differential impedance 1322, the second impedance When a difference between the input voltage between 1622 and the first impedance 310a and the input voltage between the third impedance 1624 and the fourth impedance 1626 is taken, the second impedance 1622 and the first impedance The audio signal included in the input voltage between 310a and the audio signal included in the input voltage between the third impedance 1624 and the fourth impedance 1626 cancel each other out. Accordingly, since the voltage component derived from the audio signal is not included in the output of the differential amplifier 1322, biometric information can be detected with higher precision.

In addition, in order to remove the voltage component derived from the audio signal, a predetermined frequency (fi), such as the high-pass filter 1510 of the embodiment of Fig. 15, between the audio player 1612 and the analog circuit 1610 is set as the cutoff frequency. There is no need to use a high pass filter or the like. Accordingly, there is no worry of deterioration in sound quality of the audio signal output to the earphone 110 according to the use of the high pass filter.

In addition, according to this embodiment, the first resistor R11, the second resistor R12, and the third resistor R13 have the same resistance value, and the first buffer 1614 and the second buffer 1616 are identical. Since it is a buffer circuit having a configuration and the same characteristics, the balance between the right-use audio signal and the left-use audio signal output from the audio player 1612 is maintained. Accordingly, a stereo audio signal can be preferably heard from the right ear earphone and the left ear earphone.

In addition, the first buffer 1614 and the second buffer 1616 are, for example, voltage follower circuits, so that the current values of the audio signals are increased by the first buffer 1614 and the second buffer 1616, The impedance of the audio signal is converted. Accordingly, even if, for example, the current value of the audio signal output from the audio player 1612 is not sufficient to drive the bridge circuit of the analog circuit 1610, more clearly, the c node and d node of the bridge circuit The audio signal can be added to the input voltage of.

18 shows an analog circuit according to another embodiment of the present disclosure. 19 and 20 are diagrams for explaining the analog circuit according to the embodiment of FIG. 18.

The analog circuit 1810 according to the present embodiment is a modification of the analog circuit 1310 according to another embodiment of the present disclosure shown in FIG. 13.

In the analog circuit 1310 according to the embodiment shown in Fig. 13, the impedance R1+Δr of the first impedance 310, the impedance R2 of the second impedance 1312, the impedance R3 of the third impedance 1314, the fourth impedance The impedance R4 of 1316 is an impedance that may include imaginary components, respectively. Accordingly, instead of R1+Δr, R2, R3, and R4 in Fig. 13, Z1+Δz, Z2, Z3, and Z4 are used in Figs. In addition, since the first impedance 310 is the impedance of the earphone 110, as shown in FIG. 19, it can be expressed as a series circuit of the resistance of the resistance value R_1 and the inductance of the inductance value L_1. Specifically, for example, the resistance value R_1 is about several tens of Ω, and the inductance value L_1 is about several tens of μH to hundreds of μH.

In the analog circuit 1810, in order to satisfy Z1=Z4, which is a precondition of Equation 5, as shown in FIG. 20, the fourth impedance 1826 also has a resistance of a resistance value R_1 and an inductance of an inductance value L_1. It needs to be composed of a series circuit. In addition, as shown in FIG. 20, the second impedance 1822 may be formed of a resistor having a resistance value R_2, and the third impedance 1824 may be formed of a resistor having the same resistance value R_3 as the resistance value R_2. In other words, the fourth impedance 1826 needs to be the earphone 110 corresponding to the first impedance 310 and the earphone 110 impedance of the same product. However, if the earphone 110 corresponding to the first impedance 310 and the earphone 110 of the same product are prepared, the cost is very high, and the analog circuit 1810 is mounted on a small substrate used in a portable device or the like. It is also not realistic because it becomes difficult.

Further, in order to satisfy Z1 = Z4, a method of configuring the fourth impedance 1826 by a resistance component and an inductance component can be considered. However, even if the inductance of several tens of μH is composed of a chip inductance, the size of the analog circuit 1810 becomes difficult for a small substrate used in a portable device or the like because the size is relatively large.

Therefore, in the analog circuit 1810 according to the present embodiment, as shown in FIG. 18, the first impedance 310 is composed of a series circuit of the resistance of the resistance value R_1 and the inductance of the inductance value L_1, and the second The impedance 1822 is composed of a resistor having a resistance value R_2, the third impedance 1824 is a parallel circuit of a resistor having a resistance value R_3 and a capacitor of capacity C_3, and the fourth impedance 1826 is a resistance value It consists of a resistor with R_4.

Then, assuming that Z2/Z1=Z3/Z4 is satisfied instead of Z1=Z4 and Z2=Z3 as the balance condition of the bridge circuit that is the analog circuit 1810, Equation 7 below is established.

In addition, the equations for the real part and the imaginary part of equation (7) are represented by the following equations (8) and (9), respectively.

Here, for example, when α is a positive real number, if R_1=α*R_4, R_2=α*R_3, C_3=L_1/(α*R_3*R_4), Equation 8 and Equation 9 are frequencies (ω). It becomes an identity with respect to, and the analog circuit 1810 can satisfy Equations 8 and 9 for any frequency ω. Accordingly, in the analog circuit 1810, a balanced state with high detection sensitivity can be realized.

According to the present embodiment described above, in the electronic device 100 according to the embodiment of FIG. 13, an expensive and large sized additional earphone 110 or an inductor component is not used, and a small-capacity component is inexpensively used. The analog circuit 1810 can be configured simply, and in the analog circuit 1810, a balanced state with high detection sensitivity can be realized.

In addition, in the present embodiment, a modification example of the analog circuit 1310 according to the embodiment of FIG. 13 has been described, but the same modification can be performed for the analog circuit 1110 according to the embodiment of FIG. 11.

21 shows an analog circuit 2110 according to another embodiment of the present disclosure.

The analog circuit 2110 according to this embodiment is one of the modifications of the analog circuit 1610 according to the embodiment shown in FIG. 16. 16, the output of the first buffer 1614 to which the first resistor R11 and the second resistor R12 are connected is grounded, and the output impedance of the first buffer 1614 is almost 0 Ω. Is assumed to be. Accordingly, the analog circuit 1610 shown in FIG. 16 can be replaced with an equivalent circuit (analog circuit 2110) shown in FIG. 21. 21, the resistance value R4 of the fourth impedance 1626 in FIG. 16, the resistance value R11 of the first resistor R11, and the resistance value R12 of the second resistor R12 are the resistance value R_4 and the resistance, respectively. It is the value R_11 and the resistance value R_14. In addition, as in the embodiment of FIG. 18, the impedance R1 of the first impedance 310, the impedance R2 of the second impedance 1622, the impedance R3 of the third impedance 1624, and the fourth impedance 1626 Impedance R4 is an impedance that can each contain imaginary components, so instead of R1, R2, R3, and R4 in FIG. 16, Z1, Z2, Z3, and Z4 are used in the embodiment of FIG.

In the analog circuit 2110 according to the present embodiment, the first impedance 310 is composed of a parallel circuit of the resistance of the resistance value R_1 and the inductance of the inductance value L_1 and the resistance of the resistance value R_11 connected in series. The 2 impedance 2122 is composed of a resistor having a resistance value R_2, the third impedance 2124 is composed of a parallel circuit between a resistor having a resistance value R_3 and a capacitor of capacity C_3, and the fourth impedance 2126 is a resistor. It is composed of a parallel circuit between a resistor having a value R_4, a resistor having a resistance value R_14, and a capacitor having a capacity C_4.

Then, as in the embodiment of FIG. 18, assuming that Z2/Z1=Z3/Z4 is satisfied instead of Z1=Z4 and Z2=Z3 as the balance condition of the bridge circuit that is the analog circuit 2110, the following equation 10 is established.

In addition, the equations for the real part and the imaginary part of equation (10) are represented by the following equations (11) and (12), respectively.

Here, for example, when α is a positive real number, R_1=α*R_4, R_2=α*R_3,R_11=α*R_14, C_3=L_1/(α*R_3*R_4), C_4=L_1/ If (α*R_4*R_14), Equation 11 and Equation 12 become an identity with respect to the frequency ω, and the analog circuit 2110 sets Equation 11 and Equation 12 for any frequency ω. Can be satisfied. Accordingly, in the analog circuit 2110, a balanced state with high detection sensitivity can be realized.

According to the present embodiment described above, in the electronic device 100 according to the embodiment of FIG. 16, an expensive and large sized additional earphone 110 or an inductor component is not used, and a small-capacity component is inexpensively used. Only that, the analog circuit 2110 can be configured, and in the analog circuit 2110, a balanced state with high detection sensitivity can be realized.

22 is a diagram showing amplitude and phase information of a detection signal according to another embodiment of the present disclosure. 23 is a diagram showing the structure of a processor according to another embodiment of the present disclosure. 24 is a diagram showing the structure of a processor according to another embodiment of the present disclosure.

The processor 140c according to the embodiment of FIG. 23 includes a direct current component removal unit 2302a, 2302b, and a motion correction unit 2304 when compared to the processor 140a of FIG. 5. It is different from one processor 140a. In addition, the processor 140d according to the embodiment of FIG. 24 includes a direct current component removal unit 2302a, 2302b, and a motion correction unit 2304, which is different from the processor 140b illustrated in FIG. 6. Hereinafter, in the electronic device 100 according to the embodiments of FIGS. 23 and 24, the same components as those of the electronic device 100 according to the embodiments of FIGS. 5 and 6 are denoted by the same reference numerals and description thereof Omitted.

In the bio-signal detection in the electronic device 100 according to the embodiments of FIGS. 5 and 6, particularly in pulse wave detection, the pulse wave signal component included in the detection signal is very weak. Accordingly, the detection of a biosignal in the electronic device 100 according to the embodiments of FIGS. 5 and 6 is susceptible to a signal caused by the movement (body motion) of the subject. 22 shows an amplitude graph 2210 showing the effect of the subject's motion on the amplitude component and a phase graph 2220 showing the effect of the motion on the phase component. Specifically, in the amplitude graph 2210 of FIG. 22, the vertical axis represents the amplitude magnitude of the amplitude dA in which the DC component of the DC component removal unit 2302a of FIGS. 23 and 24 is removed, and the horizontal axis represents time (seconds). Shows. In addition, in the phase graph 2220 of FIG. 22, the vertical axis represents the phase dθ where the DC component of the DC component removal unit 2302b of FIGS. 23 and 24 is removed, and the horizontal axis represents time (seconds). In addition, in FIG. 22, data when there is no movement of the subject until about 18 seconds of time is shown, and data when there is movement of the subject after about 18 seconds of time is shown. As shown in Fig. 22, the fluctuation of the amplitude component (dA) and the phase component (dθ) due to the movement of the subject is significantly larger than the fluctuation of the amplitude component (dA) and the phase component (dθ) due to the pulse wave of the subject. Accordingly, when there is movement of the subject, it is difficult to extract the pulse wave of the subject from the amplitude component dA and the phase component dθ of the detection signal.

Therefore, in the processors 140c and 140d according to the present embodiment, the signal due to the movement of the subject is removed.

The DC component removal unit 2302a removes the DC component including long-term fluctuations due to temperature (body temperature) from the amplitude A calculated by the amplitude calculation unit 512. Similarly, the DC component removal unit 2302b removes the DC component including long-term fluctuations due to temperature (body temperature) from the phase θ calculated by the phase calculation unit 532.

The motion correction unit 2304 removes the motion component of the subject according to the following equation (13) from the amplitude component dA from which the DC component is removed by the DC component removal unit 2302a.

Similarly, the motion correction unit 2304 removes the motion component of the subject from the phase component dθ where the DC component is removed by the DC component removal unit 2302b according to the following equation (13).

Further, the motion correction unit 2304 outputs the amplitude component and the phase component from which the motion component has been removed, as a signal Cd.

Here, k is a fixed parameter indicating the ratio of the amplitude component (A) and the phase component (θ), and is defined in advance by the circuit constant of the electronic device 100 or the operating point of the circuit.

25 shows a structure of a motion compensation unit according to an embodiment of the present disclosure.

The motion correcting unit 2304a illustrated in FIG. 25 calculates k in Equation 13 from the average values of the amplitude component dA and the phase component dθ from which the DC component is removed. The processor 2304a calculates an ABS average that is an average value of a predetermined time of dA (2510a), and calculates an ABS average that is an average value of a predetermined time of dθ (2510b). Next, the motion correction unit 2304a calculates k based on Equation 14 below (2520).

Here, dA_ave is the average value of the amplitude component dA at a predetermined time, and dθ_ave is the average value of the phase component dθ at the predetermined time.

In the motion correction unit 2304 illustrated in FIG. 25, by dynamically calculating k, even if the operating point of the circuit changes depending on the situation, the motion component can be removed based on the dynamically calculated optimal k.

26 illustrates a structure of a motion compensation unit according to another embodiment of the present disclosure.

The motion correction unit 2304b shown in FIG. 26 removes the motion component from the amplitude component dA and the phase component dθ only when motion is detected. Specifically, for example, when the average value dA_ave of the amplitude component dA exceeds a predefined threshold value A_th, the motion correction unit 2304b, according to Equation 13, amplitude component dA and phase The motion component is removed from the component dθ. Similarly, when the average value (dθ_ave) of the phase component (dθ) exceeds a predefined threshold value (θ_th), the motion correction unit 2304b, according to equation (13), the amplitude component (dA) and the phase component (dθ) ) To remove the motion component. In FIG. 26, k in Equation 13 is calculated according to Equation 14, but according to another embodiment, k may be previously defined by a circuit constant of the electronic device 100 or an operation point of the circuit. .

FIG. 27 shows the result of removing the motion component by the motion correction unit 2304b shown in FIG. 26.

The 2710 graph shows the amplitude component dA output from the DC component removal unit 2302a before removing the motion component, and the 2720 graph is a 30-fold magnification of the vertical axis scale of the 2710 graph. In addition, the graph of FIG. 2730 shows the amplitude component dA from which the motion component is removed by the motion correction unit 2304b. As shown in the 2710 graph and 2720 graph of FIG. 27, the waveform due to the pulse wave of the subject is observed in the no movement section (up to about 18 seconds), but the movement of the subject in the movement section (after about 18 seconds) The waveform caused by is large, and the waveform caused by pulse wave cannot be observed. On the other hand, as shown in the 2730 graph, when the motion component is removed by the motion correction unit 2304b, it is possible to observe the waveform due to the pulse wave of the subject even in the motion-existing section to the same extent as the motion-less section. Referring to FIG. 27, it can be seen that the motion component is properly removed from the amplitude component dA by the motion correction unit 2304b.

28 shows an example of DC component removal units 2302a and 2302b according to an embodiment of the present disclosure.

The DC component removal units 2302a and 2302b shown in FIG. 28 subtract the average value of the input signal A(i) of the past n samples from the input signal A(i), thereby direct current component of the input signal A(i) Remove it. Specifically, the DC component removal units 2302a and 2302b calculate, for example, the average value of the input signals A(i) of the past n samples according to Equation 15 below, and the DC components from the input signal A(i). Remove it. Further, the DC component removal units 2302a and 2302b output the signal dA(i) from which the DC component has been removed.

Fig. 29 shows the waveform of the amplitude component A before the DC component is removed, and the waveform of the amplitude component dA from which the DC component is removed.

The vertical axis in Fig. 29 represents the amplitude, and the horizontal axis represents the number of samples. In addition, one sample in the horizontal axis of FIG. 27 corresponds to 1/100 second. That is, the horizontal axis of Fig. 29 represents time, and Fig. 29 shows the waveforms of the amplitude component A from 0 to 60 seconds and the amplitude component dA from which the DC component is removed. As shown in the waveform 2910 of the amplitude component A before the DC component of FIG. 29 is removed, even when the DC component is temporally changed, it appears in the waveform 2920 of the amplitude component dA from which the DC component is removed. As described above, the DC component can be appropriately removed from the amplitude component dA by the DC component removal units 2302a and 2302b.

Here, the value of n in Equation (15) needs to be the number of samples in a section longer than the period of the signal to be detected. For example, when detecting a pulse, n needs to be more than the number of samples in one second, for example, when the sampling frequency is 100 Hz, n needs to be 100 or more. On the other hand, if n is too large, the response to the case where the DC component is changed is delayed and the DC component that can be removed is reduced. Accordingly, the value of n is appropriate, for example, about 100 or more and 200 or less.

30 shows another result of removing the DC component by the DC component removal units 2302a and 2302b.

)으로부터 움직임 성분을 제거할 수도 있다. 30 shows a waveform 3010 of the amplitude component A before the DC component is removed, and a waveform 3020 of the amplitude component dA from which the DC component is removed. The vertical axis in Fig. 30 represents the amplitude, and the horizontal axis represents the number of samples. In addition, 1 sample in the horizontal axis of FIG. 30 corresponds to 1/100 second. That is, the horizontal axis of FIG. 30 represents time, and FIG. 30 shows waveforms of the amplitude component A before the DC component from 0 to 60 seconds is removed and the amplitude component dA from which the DC component is removed. The amplitude component A shown in the 3010 graph of FIG. 30 includes not only the DC component, but also fluctuations due to the relatively gentle movement of the subject. In addition, it can be seen that, as shown in the 3020 graph of FIG. 30, the DC component removal units 2302a and 2302b remove not only the DC component but also the fluctuation due to the motion from the amplitude component A. Accordingly, according to an embodiment, the processor 140 does not have a motion correction unit 2304 separately, and the amplitude component A and the phase component () by the DC component removal units 2302a and 2302b

) Can also remove the motion component.

In addition, the processors 140a and 140b according to the embodiment shown in FIGS. 5 and 6 and the processors 140c and 140d according to the embodiment shown in FIGS. 23 and 24 are both detection filters 534 It is equipped with. The detection filter 534 is a band pass filter having a frequency at which a desired biosignal (eg, pulse) is included as a center frequency, and in a phase component, removes a noise component and emphasizes a desired frequency (eg, the frequency of the pulse) do. According to embodiments of the present disclosure, by optimizing the frequency characteristics of the detection filter 534, it is possible to effectively remove the motion component. For example, by optimizing the frequency characteristics of the detection filter 534 to attenuate low-frequency components that are prone to movement, for example, components of about 0.5 Hz or less, and emphasize the frequency components of pulse waves of about 1 Hz to about 2 Hz. While removing the component, the desired biosignal component can be emphasized.

Further, in the processors 140a and 140b shown in FIGS. 5 and 6, pulse detection is performed from the phase component θ, but pulse detection can also be performed from the amplitude component A. Specifically, the amplitude component A and the phase component θ have slightly different waveforms, but pulse detection can be performed from the amplitude component A in the same manner as described above. More specifically, pulse frequency can be detected from the amplitude component A by optimizing the frequency characteristic of the detection filter 534 shown in FIG. 5 or FIG. 6 or the threshold value of the Schmitt trigger 610.

According to the electronic device 100 according to another embodiment of the present disclosure described above, the electronic device 100 according to FIG. 5 or 6, or FIGS. 4, 11, 14, 15, 16, 18, or the same effect as that of the electronic device 100 according to FIG. 21 can be obtained, and the motion correction unit 2304 can remove the motion component of the subject from the amplitude component and the phase component. Accordingly, the electronic device 100 according to the present embodiment can detect a weak biological signal with high precision even when the subject is moving.

Next, another embodiment of the present disclosure will be described with reference to FIGS. 31 to 44.

In the electronic device 100 according to the present embodiment, as shown in FIGS. 31 and 38, the configuration of the processors 140e and 140f is the processor 140a according to FIGS. 5, 6, 23, or 24. , 140b, 140c, 140d). Specifically, as illustrated in FIGS. 31 and 38, the processors 140e and 140f include a mounting detection unit 3110a of the earphone 110 and a departure detection unit 3110b of the earphone 110. In the electronic device 100 according to the tenth embodiment, the biometric information calculation unit 112 may include at least one of the attachment detection unit 3110a of the earphone 110 and the departure detection unit 3110b of the earphone 110. have. Other configurations of the electronic device 100 according to the present embodiment are the same as the processors 140a, 140b, 140c, 140d according to the embodiments of FIGS. 5, 6, 23, or 24, or the corresponding processor 140a , 140b, 140c, 140d), it is possible to combine the configuration of FIG. 31 or FIG. 38. In the configuration of FIG. 31 or 38, the same reference numerals are assigned to components corresponding to the components of the embodiment of FIGS. 5, 6, 23, or 24, and the description thereof is omitted.

31 illustrates a structure of a processor according to another embodiment of the present disclosure.

The processor 140e according to the embodiment of FIG. 31 may further include a mounting detection unit 3110a in the embodiment configuration of FIGS. 5, 6, 23, 24, or 38. The mounting detection unit 3110a includes a first differential calculation unit 3112 and a first threshold value processing unit 3114.

38 illustrates a structure of a processor according to another embodiment of the present disclosure.

The processor 140f according to the embodiment of FIG. 38 may further include a departure detection unit 3110b in the embodiment configuration of FIGS. 5, 6, 23, 24, or 31. As shown in FIG. 38, the departure detection unit 3110b includes a second derivative calculating unit 3812, a second threshold processing unit 3814, a moving average processing unit 3816, a wave height digitization unit 3818, and a third threshold. And a value processing unit 3820 and the like.

31 and 38, other configurations of the processors 140e, 140f are the same as the processors 140a, 140b, 140c, or 140d of FIGS. 5, 6, 23, or 24, and thus Was omitted. Also, the electronic device 100 according to the present embodiment may include analog circuits 1110, 1310, 1520, and 1610 according to the embodiments of FIGS. 4, 11, 13, 15, 16, 18, or 21. , 1810, or 2110), the subject detects that the earphone 110 is mounted and removed. Specifically, from the voltage Δe output from any one of the analog circuits 1110, 1310, 1520, 1610, 1810, or 2110, through the band pass filter 414, ADC 416, orthogonal demodulator 420 The in-phase component (I) and the quadrature component (Q) are generated. Then, the in-phase component (I) and the quadrature component (Q) are input to the processors 140e and 140f. In the following description, the amplitude component (A) is calculated from the in-phase component (I) by the amplitude calculating unit 512 of the processor (140e, 140f), the phase component (θ) of the processor (140e, 140f) It is calculated from the orthogonal phase component Q by the phase calculating unit 532.

First, the detection process of attaching the earphone 110 to the subject will be described.

Fig. 32 is a diagram showing a time change of the amplitude component A generated by the processor when the subject is wearing the earphone. 33 is a diagram showing a time change of the phase component θ generated by the processor when the subject is wearing the earphone. In Fig. 32, the vertical axis represents amplitude, and the horizontal axis represents time (seconds). In Fig. 33, the vertical axis represents phase, and the horizontal axis represents time (seconds). In FIGS. 32 and 33, the amplitude component (A) and the phase component (θ) are greatly changed in a portion of about 10 seconds, and the earphone 110 is attached to the subject. In order to further emphasize changes in the values of the amplitude component (A) and the phase component (θ), the first differential calculator 3112 performs time-differential processing of the amplitude component (A) and the phase component (θ).

Specifically, the first differential calculating unit 3112 holds the amplitude component A calculated by the amplitude calculating unit 512 and the phase component θ calculated by the phase calculating unit 532 by a predetermined number of frames. do. The holding process may be performed using, for example, buffers, resistors, capacitors, and the like. For example, the first differential calculator 3112 holds the amplitude component A and the phase component θ by 100 frames. If each frame is acquired at 100 Hz, 100 frames are 1 second long.

Subsequently, the first differential calculating unit 3112 calculates an average value of the first 50 frames and an average value of the second 50 frames among the 100 frames held and calculates a difference by subtracting the average value of the first 50 frames from the average value of the second 50 frames.

Then, the first differential calculating unit 3112 repeats the processing, thereby performing time differential processing of the amplitude component (A) and the phase component (θ).

In addition, the number of frames to be held is appropriately determined according to the sampling rates of the in-phase component (I) and the quadrature component (Q) input to the processor 140e, and may be, for example, 1 frame or 1000 frames.

Fig. 34 shows an example of the result of time-differentiating the amplitude component (A). 35 shows an example of a result of time-differentiating the phase component θ.

Subsequently, the first threshold value processing unit 3114 performs threshold value processing on the result of the time-differentiated amplitude component A shown in FIG. 34 and the time-differentiated phase component θ shown in FIG. 35. By doing so, it is determined whether or not the subject is wearing an earphone. Hereinafter, the time-differentiated amplitude component A is referred to as a differential amplitude value, and the time-differentiated phase component θ is referred to as a differential phase value.

36 and 37, threshold value processing of differential amplitude values and differential phase values will be described. 36 is a diagram for describing threshold value processing of differential amplitude values. 37 is a diagram for explaining threshold value processing of differential phase values.

As illustrated in FIG. 36, the first threshold value processing unit 3114 determines whether the subject's earphone 110 is mounted based on the comparison of the differential amplitude value with the threshold value A and the threshold value B. Specifically, the first threshold value processing unit 3114 sets a flag when the differential amplitude value exceeds the upper threshold value A and falls below the lower threshold value B within a predetermined time. In addition, the first threshold value processing unit 3114, if the differential amplitude value exceeds the upper threshold value A, and does not fall below the lower threshold value B within a predetermined time, the information that the differential amplitude value exceeds the upper threshold value A Is reset. In addition, the predetermined time may be, for example, a time of 0 seconds or more and 10 seconds or less.

Similarly, as illustrated in FIG. 37, the first threshold value processing unit 3114 determines whether the subject's earphone 110 is mounted based on the comparison of the differential phase value with the threshold value C and the threshold value D. Specifically, the first threshold value processing unit 3114 sets a flag when the differential phase value falls below the lower threshold value D and then exceeds the upper threshold value C within a predetermined time. In addition, the first threshold value processing unit 3114, if the differential phase value is lower than the lower threshold value D, and does not exceed the upper threshold value C within a predetermined time, the differential phase value is less than the threshold value D reset do. In addition, the predetermined time may be, for example, a time of 0 seconds or more and 10 seconds or less.

In addition, when the flag is set at both the differential amplitude value and the differential phase value, the first threshold value processor 3114 determines that the subject is equipped with the earphone 110.

In addition, if the flag stands on one side of the differential amplitude value and the differential phase value, and the flag does not stand on the other side within a predetermined time, the information of the erected flag is reset. In addition, the predetermined time may be, for example, a time of 0 seconds or more and 10 seconds or less.

Further, the first threshold value processing unit 3114 may determine that the subject is equipped with the earphone 110 when the flag stands at either one of the differential amplitude value and the differential phase value. In addition, the first threshold value processing unit 3114 when the differential amplitude value exceeds the threshold value A, or when the differential amplitude value is lower than the threshold value B, or when the differential phase value is lower than the threshold value D Alternatively, when the differential phase value exceeds the threshold value C, the subject may determine that the earphone 110 is mounted. In this case, the electronic device 100 can detect the attachment of the earphone 110 to the subject without detecting threshold values for all four threshold values A, B, C, and D, so that the detection time is short.

Next, the process of detecting the departure of the earphone 110 from the subject will be described.

The detection of the departure of the earphone 110 from the subject is performed by different algorithms in the amplitude component A and the phase component θ, unlike the attachment of the earphone 110 to the subject.

First, the departure detection processing of the earphone 110 from the subject based on the amplitude component A will be described.

39 shows the temporal change of the amplitude component A generated by the processor when the subject detached the earphone from the outer ear canal.

In Fig. 39, the vertical axis represents amplitude, and the horizontal axis represents time (seconds). In Fig. 39, in the portion of about 42 seconds, the amplitude component A is greatly changed. At this time, the examinee removed or removed the earphone 110. In order to further emphasize the change in the value of the amplitude component (A), the second derivative calculating unit 3812 performs time differential processing of the amplitude component (A). Here, the detailed description of the time differentiation process is the same as described above, and thus is omitted.

40 shows an example of the result of time-differentiating the amplitude component (A).

In Fig. 39, the amplitude of the amplitude component A starts to drop at about 55 seconds, and at 40, the differential amplitude value is changed from a positive value to a negative value at about 55 seconds. When the amplitude drop of the amplitude component A shown in FIG. 39 continues for a predetermined time, the processor 140f may determine that the earphone 110 has been removed from the subject. The second threshold value processing unit 3814 determines that the earphone 110 is removed from the subject when the differential amplitude value continues to fall below the threshold value F for a predetermined time. According to an embodiment, in FIG. 40, the threshold F is 0, and the predetermined time may be, for example, a time of about 0 seconds or more and 10 seconds or less.

Next, the separation detection processing of the earphone 110 from the subject based on the phase component θ will be described.

)의 시간 변화를 나타낸다. 41 is a phase component generated by the processor when the subject removes the earphone (

).

In Fig. 41, the vertical axis represents phase, and the horizontal axis represents time (seconds). In addition, it can be seen from FIG. 41 that the dashed line 4120 shows a phase value and gradually rises with time. Since it is difficult to extract the height of the wave of the waveform, that is, the AC component, from the gently changing phase component θ, the moving average processing unit 3816 performs a moving average processing on the phase component θ. The solid line 4110 in Fig. 41 shows the result of 20 times of the moving average of 5 points to the phase value indicated by the broken line 4120. As shown by the solid line 4110 in FIG. 41, by performing a moving average process on the phase component θ, the AC component can be removed from the phase component θ. Accordingly, the moving average processing unit 3816 extracts an AC component from the phase component θ by subtracting the value indicated by the solid line 4110 from the phase value indicated by the broken line 4120.

Fig. 42 shows the AC component of the phase component θ when the subject is wearing the earphone. Fig. 43 shows the AC component of the phase component θ when the subject is not wearing the earphone.

When comparing FIGS. 42 and 43, it can be seen that the wave heights of the phase component θ are different. In other words, the AC component of the phase component θ when the examinee shown in FIG. 42 is wearing the earphone 110 includes fluctuations originating from the pulse, and the examinee shown in FIG. 43 shows the earphone 110 The fluctuation derived from a pulse was not included in the alternating current component of the phase component (theta) when () was not attached. Accordingly, in order to compare the AC component illustrated in FIG. 42 with the AC component illustrated in FIG. 43, the wave height digitizing unit 3818 quantifies the height of the wave of the AC component illustrated in FIG. 42 and the AC component illustrated in FIG. 43. To do.

Specifically, the wave height digitizing unit 3818 calculates the difference between the height of the convex peak and the height of the concave portion of the waveform of the AC component shown in FIGS. 42 and 43 as the wave height, thereby increasing the wave height of the AC component. Digitization is performed. More specifically, the difference between the average value of the height of the concave peak before and after the convex peak and the height of the convex peak can also be calculated, and the difference between the height of either of the concave peak before and after the convex peak and the height of the convex peak can be calculated. It can also be calculated.

44 shows the height of the digitized wave of the AC component of the phase component θ.

In Fig. 44, the vertical axis represents the height of the digitized wave, and the horizontal axis represents time (seconds). 44, between 30 and 40 seconds, the subject is wearing the earphone 110, and between 40 and 46 seconds, the subject is removing the earphone 110, and after 46 seconds, the subject is The earphone 110 is detached from the state. As shown in FIG. 44, the height of the digitized wave of the AC component of the phase component θ is measured when the subject is wearing the earphone 110 (30 seconds to 40 seconds) and the subject is listening to the earphone 110. The case of removal (after 46 seconds) is clearly different. Accordingly, when the height of the digitized wave of the AC component of the phase component θ is less than the threshold value E, the third threshold value processing unit 3820 determines that the earphone 110 is removed from the subject.

As described above, the separation detection of the earphone 110 from the subject is performed by different algorithms in the amplitude component A and the phase component θ, unlike the attachment of the earphone 110 to the subject. Accordingly, the processor 140f according to another embodiment of the present disclosure may determine that the earphone 110 is separated from the subject based on one of the amplitude component A and the phase component θ. In addition, the processor 140f according to another embodiment of the present disclosure, when the separation of the earphone 110 from the subject is detected in both the amplitude component (A) and the phase component (θ), the earphone 110 from the subject It may be judged to have been removed.

According to the electronic device 100 employing the processors 140e and 140f according to another embodiment of the present disclosure described above, the same effects as the electronic device 100 according to the above-described embodiments are obtained, of course, The amplitude component A calculated from the in-phase component I by the amplitude calculator 512 and the phase component θ calculated from the orthogonal phase component Q by the phase calculator 532 are based on at least one. Thus, the attachment of the earphone 110 to the subject and the separation of the earphone 110 from the subject can be detected. Accordingly, even if a proximity sensor or the like is not built in the earphone 110, the attachment or detachment of the earphone 110 to the subject can be detected. Accordingly, the electronic device 100 according to another embodiment of the present disclosure can perform detachment detection of the earphone 110 to the subject at a low cost, and the electronic device 100 due to the absence of a separate sensor It is possible to save space inside and not increase power consumption. For example, when the battery is built in the earphone 110, such as the wireless earphone 110, the proximity sensor detects the detachment of the earphone 110 to the subject and turns the battery ON/OFF, according to this embodiment. The electronic device 100 can perform battery ON/OFF without a proximity sensor.

In addition, the embodiments of the present disclosure are not limited to the above-described embodiments, and appropriate changes can be made without departing from the spirit. For example, in the embodiments of FIGS. 4, 11, 13, 15, 16, 18, 21, 23, and 24, DACs 410, 1120, 1122, ADC 416, and the like are used. However, if the signal generator 130 and the orthogonal demodulator 420 are configured as analog circuits, the DACs 410, 1120, 1122 and the ADC 416 can be omitted. Also, in the embodiment of FIG. 14, if the signal generating unit 130 is composed of an analog circuit, the DAC 410 can be omitted.

In addition, in the embodiments of the present disclosure, an example in which pulse and body temperature are mainly detected as biometric information is shown, but biometric information detected by the electronic device 100 according to embodiments of the present disclosure is limited to pulse and body temperature. It does not work.

Further, in embodiments of the present disclosure, the electronic device 100 may be a wired earphone type or a wireless earphone type electronic device.

45 is a flowchart illustrating a method of controlling an electronic device according to an embodiment of the present disclosure.

Each step of the electronic device control method of the present disclosure may be performed by various types of electronic devices including earphones, first circuits, and processors. This specification mainly describes an embodiment in which the electronic device 100 according to embodiments of the present disclosure performs an electronic device control method. Accordingly, the embodiments described with respect to the electronic device 100 are applicable to the embodiments of the electronic device control method, and conversely, the embodiments described with respect to the electronic device control method are applicable to the embodiments with respect to the electronic device 100. It is applicable. The electronic device control method according to the disclosed embodiments is performed by the electronic device 100 disclosed herein, and the embodiment is not limited, and may be performed by various types of electronic devices.

The electronic device 100 outputs a first AC signal to the first circuit (S4502). The processor 140 of the electronic device 100 may control the signal generator 130 to output the first AC signal to the first circuit.

Next, the electronic device 100 obtains a first detection signal including a voltage component corresponding to the first impedance component from the first circuit (S4504). The processor 140 may obtain a first detection signal from the output terminal of the first circuit. The first circuit may convert the voltage detected by the analog circuit to analog-digital conversion and output it to the processor 140. According to an embodiment, the first detection signal may include an in-phase component signal (I) and a quadrature-phase component signal (Q). According to another embodiment, the first detection signal may include an amplitude component signal (A) and a direct current component signal (DC).

Next, the electronic device 100 generates at least one biometric information based on the first detection signal (S4506). The at least one biometric information may include at least one of heart rate information or body temperature information, or a combination thereof. The processor 140 may acquire amplitude information and phase information from the first detection signal, calculate body temperature information from the amplitude information, and calculate heart rate information from the phase information.

According to an embodiment, the processor 140 may include an operation of correcting a user's movement in an operation of calculating heart rate information. The processor 140 calculates an average value of each of the differential value from which the DC component is removed from the amplitude information and the differential value from which the DC component is removed from the phase information, and generates a signal Cd from which the motion component is removed from the average value of the differential values can do. The operation of correcting the motion is similar to that of the embodiments of FIGS. 23 and 24, and redundant description is omitted.

According to an embodiment, the processor 140 may include an operation of detecting wearing and separation of the earphone from the first detection signal. The operation of detecting the wearing and detachment of the earphone is similar to that of the embodiments of FIGS. 31 to 44, so a duplicate description is omitted.

Next, the electronic device 100 outputs at least one biometric information (S4508). The electronic device 100 may output at least one biometric information to an external device through a communication unit, display it through a display, or output sound through an earphone.

46 is a diagram illustrating a configuration of an electronic device according to an embodiment of the present disclosure.

The electronic device 100 may be implemented in various forms, and FIG. 46 shows the structure of the electronic device 4600 according to an embodiment of the present disclosure. The electronic device 4600 includes a processor 4610, a memory 4620, an earphone 4630, an analog circuit part 4462, a sensor part 4640, an input/output part 4650, and a communication part 4660. The earphone 110 of the electronic device 100 corresponds to the earphone 4630 of the electronic device 4600, and the first circuit 120 and the signal generator 130 of the electronic device 100 are the electronic device 4600 Corresponding to the analog circuit portion 4462 of the, the processor 140 of the electronic device 100 may correspond to the processor 4610 of the electronic device 4600.

The processor 4610 may include one or more processors. The processor 4610 may include a dedicated processor such as a central control unit 4611, an image processing unit 4612, and an AI processing unit 4613.

The memory 4620 may include a volatile storage medium, a non-volatile storage medium, or a combination thereof. Also, the memory 4620 may include various types of memories such as main memory, cache memory, registers, and non-volatile memory. The memory 4620 may be implemented with various types of storage media. For example, the memory 4620 is a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) Etc.), RAM (RAM, Random Access Memory), SRAM (Static Random Access Memory), ROM (ROM, Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory), It may include at least one of a magnetic memory, a magnetic disk, an optical disk, or a combination thereof.

The earphone 4630 converts an electrical signal into a sound wave signal and outputs it. The earphone 4630 may convert an electrical signal into a sound wave signal by operating a diaphragm.

The analog circuit portion 4462 generates, transmits, or processes analog signals. The analog circuit 4463 includes at least one analog element, and includes, for example, an analog element such as a resistor, capacitor, or inductor. The analog circuit 4463 may be implemented in the form of a printed circuit board (PCB), a flexible printed circuit board (FPCB), or an application apecific integrated circuit (ASIC). The analog circuit unit 4462 can generate, transmit, or process data signals, control signals, and power signals.

The sensor unit 4640 may include various types of sensors. The sensor unit 4640 may be, for example, an illuminance sensor 4641, an acceleration sensor 4642, a gyro sensor 4644, a fingerprint sensor 4644, a pressure sensor 4645, or a biosensor 4646 or a combination thereof. It may include. The signal detected by the sensor unit 4640 is input to the processor 4610, and the processor 4610 is based on the output signal of the sensor unit 4640, the display brightness adjustment, camera brightness adjustment, motion detection, device orientation detection, Fingerprint recognition, biological signal detection and processing, and biometric authentication can be performed.

The input/output unit 4650 may include various types of input/output interfaces. The input/output unit 4650 is, for example, a display 4651, a touch screen 4652, a touch pad 4653, an audio input/output unit 4654, an HDMI 4655, or a USB 4656, or a combination thereof. It may include. The communication unit 4640 may include various types of communication modules. The input/output unit 4650 may include various types of input/output components. The processor 4610 may perform processing such as gesture recognition and voice recognition based on a signal input from the input/output unit 4650.

The communication unit 4660 may include at least one of a short-range communication unit 4462, a mobile communication unit 4664, or a broadcast reception unit 4666, or a combination thereof. The short-range communication unit 4462 includes Bluetooth, Bluetooth Low Energy (BLE), Near Field Communication (RF), Radio Frequency Identification (RFID), WLAN (Wi-Fi), Zigbee, and IR (Infrared Data Association) communication. , WFD (Wi-Fi Direct), UWB (ultra wideband), Ant+ communication, or a combination thereof. The electronic device 4600 may communicate with various types of external devices through the communication unit 4660. The electronic device 4600 may exchange data and control signals by communicating with a server, another mobile device, a wearable device, or another PC through the communication unit 4660, for example.

Meanwhile, the disclosed embodiments may be implemented as an S/W program including instructions stored in a computer-readable storage media. Further, the disclosed embodiments may be implemented as a computer-readable storage medium storing a computer program.

The computer is a device capable of invoking stored instructions from a storage medium and operating according to the disclosed embodiment according to the invoked instruction, and may include an electronic device according to the disclosed embodiments.

The computer-readable storage medium may be provided in the form of a non-transitory storage medium. Here,'non-transitory' means that the storage medium does not contain a signal and is tangible, but does not distinguish between data being stored semi-permanently or temporarily on the storage medium.

Also, an electronic device and a method of operating the same according to the disclosed embodiments may be provided in a computer program product. Computer program products can be traded between sellers and buyers as products.

The computer program product may include an S/W program and a storage medium readable by a computer in which the S/W program is stored. For example, the computer program product may include a product (eg, downloadable app) in the form of an S/W program that is distributed electronically through an electronic device manufacturer or an electronic market (eg, Google Play Store, App Store). have. For electronic distribution, at least a part of the S/W program may be stored on a storage medium or temporarily generated. In this case, the storage medium may be a server of a manufacturer, a server of an electronic market, or a storage medium of a relay server temporarily storing a SW program.

The computer program product may include a storage medium of a server or a storage medium of a terminal in a system composed of a server and a terminal (eg, an electronic device, a portable electronic device, a wearable device, etc.). Alternatively, when a third device (eg, a smart phone) is in communication with a server or terminal, the computer program product may include a storage medium of the third device. Alternatively, the computer program product may include an S/W program itself transmitted from a server to a terminal or a third device, or transmitted from a third device to a terminal.

In this case, one of the server, the terminal, and the third device may execute the computer program product to perform the method according to the disclosed embodiments. Alternatively, two or more of the server, the terminal, and the third device may execute the computer program product to distribute the method according to the disclosed embodiments.

For example, a server (eg, a cloud server or an artificial intelligence server, etc.) may execute a computer program product stored in the server, and control the terminal connected to the server to perform the method according to the disclosed embodiments.

As another example, the third device may execute a computer program product to control a terminal in communication with the third device to perform the method according to the disclosed embodiment. As a specific example, the third device may be controlled to remotely control the electronic device to perform a method of controlling the electronic device.

When the third device executes the computer program product, the third device may download the computer program product from the server and execute the downloaded computer program product. Alternatively, the third device may execute a computer program product provided in a preloaded state to perform the method according to the disclosed embodiments.

As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those of ordinary skill in the art to which the embodiments of the present disclosure pertain may implement embodiments of the present disclosure in different forms from the disclosed embodiments without changing the technical spirit or essential features of the embodiments of the present disclosure. Will understand The disclosed embodiments are illustrative and should not be construed as limiting.

100, 100a electronic device
110 earphone
120 first circuit
130 signal generator
140, 140a, 140b, 140c, 140d, 140e, 140f processors
310 first impedance component
310a right ear earphone impedance
310b left ear earphone impedance
320 first analog element
430, 1110, 1310, 1520, 1610, 1810, 2110 analog circuit
410 DAC
412 amplifier
414 BPF
416 ADC
420 orthogonal demodulator
512 amplitude calculator
532 phase calculator
I frostbite component
Q orthogonal phase component
1612 audio player
2304, 2304a, 2304b motion compensation unit
3110a mounting detector
3110b deviation detection unit

Claims (20)

An earphone including a first impedance component;
A signal generator outputting a first AC signal;
And at least one first analog element electrically coupled to the first impedance component and having an impedance component, receiving the first AC signal, and including a voltage component corresponding to the first impedance component A first circuit for outputting the first detection signal; And
And one or more processors generating and outputting at least one biometric information based on the first detection signal. According to claim 1,
The electronic device has a form in which the earphone is inserted into the external auditory meatus of a person,
The size of the first impedance component is changed according to the change in the pressure of the ear canal, the electronic device. According to claim 1,
The at least one biometric information includes heart rate information,
The at least one processor generates heart rate information based on a phase component of the first detection signal. According to claim 1,
The at least one biometric information includes body temperature information,
And the one or more processors generate body temperature information based on an amplitude component of the first detection signal. According to claim 1,
The first alternating current signal has a frequency in the ultrasonic range. According to claim 1,
The first alternating current signal has a frequency of 20 kHz or more and 40 kHz or less. According to claim 1,
The first circuit generates the first detection signal including an in-phase component in-phase signal and an orthogonal phase-component orthogonal signal from an intermediate detection signal of a node connected to the first AC signal and the first analog element, And outputting the first detection signal to the one or more processors. The method of claim 7,
The one or more processors,
Body temperature information is generated based on a sum of square values of each of the in-phase signal and the orthogonal signal,
An electronic device that generates heart rate information based on phase information extracted from the in-phase signal and the orthogonal signal. According to claim 1,
The first circuit,
A second impedance element connected to the first impedance component and a bridge circuit structure, a third impedance element, and a fourth impedance element,
Receiving the first AC signal through at least one of the first node or the second node of the bridge circuit structure or a combination thereof,
An electronic device that generates an in-phase signal of an in-phase component and an orthogonal signal of an orthogonal phase component from an intermediate detection signal output from a third node of the bridge circuit structure, and outputs the in-phase signal and the orthogonal signal to the one or more processors. The method of claim 9,
The two impedance elements directly connected to the first node have the same impedance value,
The two impedance elements directly connected to the second node have the same impedance value. The method of claim 9,
The first node receives the first AC signal,
The second node receives the first AC signal delayed by 180 degrees,
The first impedance component is connected between the fourth node and the first node,
And the fourth node is connected to a ground potential. The method of claim 9,
The first node receives the first AC signal,
The second node is connected to ground potential,
The first impedance component is connected between the second node and the fourth node,
And the first circuit differentially amplifies the signal of the fourth node and the signal of the third node to generate the first detection signal. The method of claim 9,
The first impedance component is connected between the second node and the fourth node,
The second impedance element is connected between the first node and the fourth node, the third impedance element is connected between the first node and the third node, and the fourth impedance element is the second node And connected between the third node,
The earphone has a first resistance component and a first inductance component,
The second impedance element includes a second resistor, the third impedance element includes a third resistor and a third capacitor connected in parallel with the third resistor, and the fourth impedance element includes a fourth resistor,
The first resistance component and the fourth resistance have the same size of the resistance component,
The second resistance and the third resistance have the same size of the resistance component,
The third capacitor has an electrical storage component having a size of {first inductance component/(resistance component of the third resistor * resistance component of the fourth resistor)}. The method of claim 9,
The first impedance component is connected between the second node and the fourth node,
The second impedance element is connected between the first node and the fourth node, the third impedance element is connected between the first node and the third node, and the fourth impedance element is the second node And connected between the third node,
The first impedance component includes a first-first resistance component and a first inductance component connected in series between the second node and the fourth node, and a first-one resistance component between the second node and the fourth node, and And a 1-2 resistance component connected in parallel with the first inductance component,
The second impedance element includes a second resistor,
The third impedance element includes a third resistor and a third capacitor connected in parallel between the first node and the third node,
And the fourth impedance element includes a 4-1 resistor, a 4-2 resistor, and a fourth capacitor connected in parallel between the second node and the third node. The method of claim 14,
The 1-1 resistance component and the 4-1 resistance have the same size of the resistance component,
The second resistance and the third resistance have the same size of the resistance component,
The size of the resistance component of the first-2 resistance component and the fourth-2 resistance is the same,
The third capacitor has an electrical storage component having a size of {first inductance component/(resistance component of third resistor * resistance component of 4-1 resistor)}}. According to claim 1,
The first circuit includes a band pass filter and an envelope detector, and the second intermediate detection modulates the first intermediate detection signal of the node connected to the first analog element with the band pass filter and the envelope detector. Generating a signal, and generating the first detection signal including an amplitude fluctuation component signal and a direct current component signal generated from the second intermediate detection signal,
And the one or more processors generate heart rate information from the amplitude fluctuation component signal and the body temperature information from the direct current component signal. According to claim 1,
The first circuit receives an electrical audio signal corresponding to an audio signal output through the earphone, processes the audio signal with a high pass filter, and then applies it to at least one node of the first circuit. Device. According to claim 1,
The first circuit generates the first detection signal including an in-phase component in-phase signal and an orthogonal phase-component orthogonal signal from an intermediate detection signal of a node connected to the first AC signal and the first analog element,
The at least one processor generates an amplitude signal of an amplitude component and a phase signal of a phase component from the in-phase signal and the orthogonal signal, and removes a motion component of the electronic device using the amplitude signal and the phase signal. . According to claim 1,
The first circuit generates the first detection signal including an in-phase component in-phase signal and an orthogonal phase-component orthogonal signal from an intermediate detection signal of a node connected to the first AC signal and the first analog element,
The one or more processors generate an amplitude signal of an amplitude component and a phase signal of a phase component from the in-phase signal and the orthogonal signal, and wear or wear the electronic device based on a change amount of at least one of the amplitude signal or the phase signal. An electronic device that detects detachment. In the control method of the electronic device,
The electronic device,
An earphone comprising a first impedance component, and
A first circuit comprising at least one first analog element electrically coupled to the first impedance component and having an impedance component,
The electronic device control method,
Controlling to output a first AC signal to the first circuit;
Obtaining a first detection signal including a voltage component corresponding to the first impedance component from the first circuit;
Generating at least one biometric information based on the first detection signal; And
And outputting the at least one biometric information.

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