KR20230120058A - Apparatus and method for confirming wearing of electronic device - Google Patents

Abstract

This document relates to a device and method for determining whether an electronic device is worn, wherein the electronic device irradiates light sources of at least two wavelength bands, measures reflected light of each wavelength band, and determines the at least one light source based on the measured waveform. Absorbance of each of two wavelength bands is calculated, oxygen saturation is calculated using the absorbance of each of the at least two wavelength bands, and whether or not the electronic device is worn is checked by determining whether the oxygen saturation is within a predetermined range.

Description

Apparatus and method for checking whether an electronic device is worn {APPARATUS AND METHOD FOR CONFIRMING WEARING OF ELECTRONIC DEVICE}

The following embodiments relate to a technology for determining whether an electronic device is worn.

Wearables are portable devices that can be worn by the user or incorporated into the user's clothing or accessories, such as bands, smart watches, smart shoes, smart clothing, smart glasses, smart helmets, smart rings, and the like. It is an electronic device. These electronic devices may be connected to terminals (eg, smart phones, tablet computers, and personal computers) via a wired or wireless interface.

On the other hand, with the development of electronic information technology, various types of “wearable” devices that can measure pulse rate or body temperature in a non-invasive way without the need to attach electrodes for measuring body conditions and wear on the body like a wristwatch have been proposed. there is.

This wearable device can be used by people with high health orientation to manage their own health, and as an example, it is useful for adjusting the load of exercise by grasping the change in pulse rate during exercise or checking the amount of exercise by checking the number of steps. .

Users who use wearable devices do not stop at figuring out their own amount of exercise, but share their amount of exercise with friends or colleagues around them and use it to compete.

In addition, as portable terminals are widely used in daily life, it is becoming important to authenticate individuals.

According to various embodiments disclosed in this document, it is possible to measure blood oxygen saturation and determine whether an electronic device is worn or not using the measured oxygen saturation.

A method for determining whether an electronic device is worn according to an embodiment includes irradiating a light source of at least two wavelength bands, measuring reflected light of each wavelength band, and measuring the at least two wavelength bands based on a measured waveform. An operation of calculating each absorbance, an operation of calculating oxygen saturation using the absorbance of each of the at least two wavelength bands, and an operation of checking whether or not the electronic device is worn by determining whether the oxygen saturation is within a predetermined range. can include

An electronic device according to an embodiment includes a photoplethysmography sensor that irradiates light sources in at least two wavelength bands and measures reflected light in each wavelength band, and measures absorbance of each of the at least two wavelength bands based on a measured waveform. and a processor that calculates oxygen saturation using the absorbance of each of the at least two wavelength bands, and determines whether the electronic device is worn by determining whether the oxygen saturation is within a preset range.

This document irradiates a light source of at least two wavelength bands, measures the reflected light of each wavelength band, calculates the absorbance of each of the at least two wavelength bands based on the measured waveform, and An electronic device and method for calculating oxygen saturation using absorbance and checking whether or not an electronic device is worn based on whether the oxygen saturation is within a predetermined range, and determining whether a person is wearing an electronic device It can be verified and can be used as additional authentication during personal authentication.

1 is a block diagram of an electronic device according to an embodiment.
2 is a detailed block diagram of an electronic device in a network environment according to an embodiment.
3 is a front perspective view of an electronic device according to an exemplary embodiment.
4 is a rear perspective view of an electronic device according to an exemplary embodiment.
5 is an exploded perspective view of an electronic device according to an exemplary embodiment.
6 is a flowchart illustrating an example of a process of determining whether an electronic device is worn by a person according to an embodiment.
7 is a flowchart illustrating another example of a process of checking whether an electronic device is worn by a person according to an embodiment.
8 is a flowchart illustrating a process of calculating oxygen saturation in an electronic device according to an exemplary embodiment.
9 is a diagram illustrating an example of two wavelength bands set to calculate oxygen saturation in an electronic device according to an embodiment.
10 is a diagram illustrating components of an optical signal measured in blood vessels and tissues through an optical plethysmography sensor according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Terms used in the examples are used only for descriptive purposes and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used in describing the components of the embodiment. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

Components included in one embodiment and components having common functions will be described using the same names in other embodiments. Unless stated to the contrary, descriptions described in one embodiment may be applied to other embodiments, and detailed descriptions will be omitted to the extent of overlap.

In the following, according to an embodiment of the present invention An apparatus and method for determining whether an electronic device is worn will be described in detail with reference to FIGS. 1 to 9 attached.

1 is a block diagram of an electronic device according to an embodiment. 2 is a detailed block diagram of an electronic device in a network environment according to an embodiment.

As shown in FIG. 1 , an electronic device 101 according to an embodiment may include a processor 120, a photoplethysmography sensor 172, a display module 160, and a memory 130. However, not all illustrated components are essential components. The electronic device 101 may be implemented with more components than those illustrated, or the electronic device 101 may be implemented with fewer components. In this case, the electronic device 101 may be a wearable device such as a smart watch.

For example, as shown in FIG. 2 , the electronic device 101 according to an embodiment includes an input module 150, an audio output module 155, an audio module 170, a sensor module 171, and an interface. (177), connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196, or antenna module (197) may be further included. In some embodiments, in the electronic device 101, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added. In some embodiments, some of these components (eg, sensor module 171, camera module 180, or antenna module 197) are integrated into one component (eg, display module 160). It can be.

Hereinafter, we look at the above components.

The photoplethysmogram (PPG) sensor 172 may measure blood oxygen saturation (SpO ₂ ) using infrared and visible light (eg, red light or green light).

The photoplethysmography sensor 172 may measure blood oxygen saturation (SpO 2 ) using a difference in light absorbance between oxy-hemoglobin and deoxy-hemoglobin bound to red blood cells.

More specifically, the photoplethysmography sensor 172 may irradiate light sources of at least two wavelength bands, measure reflected light of each wavelength band, and provide the measured light to the processor 120 .

In this case, at least one of the two wavelength bands may have a wavelength smaller than 800 nm, and at least one of the at least two wavelength bands may have a wavelength larger than 800 nm. Here, a detailed description of at least two wavelength bands will be described later with reference to FIG. 9 .

The processor 120 subtracts the DC component from the measured waveform, takes the reciprocal, calculates the absorbance of each of the at least two wavelength bands, calculates the oxygen saturation using the absorbance of each of the at least two wavelength bands, and calculates the oxygen saturation based on the oxygen saturation. Whether or not the electronic device 101 is worn can be checked based on whether the electronic device 101 is included in the set range. Here, a detailed description of the DC component and the AC component will be described later with reference to FIG. 10 .

The processor 120 determines that the electronic device 101 is worn by a person if the oxygen saturation is within a predetermined range, and if the oxygen saturation is not within the predetermined range, the electronic device 101 is not worn by a person. It can be judged that it is not. At this time, a predetermined range of oxygen saturation for determining whether or not there is a person may be 95% to 100%.

The processor 120 calculates the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin by applying the absorbance of each of the at least two wavelength bands to a predetermined equation corresponding to each wavelength band, and the concentration of oxyhemoglobin and dioxyhemoglobin Oxygen saturation can be calculated using the concentration of

The processor 120 may calculate oxygen saturation by dividing the concentration of oxyhemoglobin by a value obtained by adding the concentration of oxyhemoglobin and the concentration of deoxyhemoglobin.

As another embodiment of the processor 120 for checking whether or not the electronic device 101 is worn, the processor 120 checks the DC component of the measured waveform, checks whether the value of the DC component is smaller than a preset reference value, If the value of the DC component is greater than or equal to a predetermined reference value, the absorbance of each of at least two wavelength bands is calculated based on the measured waveform, the oxygen saturation is calculated using the absorbance of each of the at least two wavelength bands, and the oxygen saturation is determined as the base value. Whether or not the electronic device 101 is worn can be checked based on whether the electronic device 101 is included in the set range. More specifically, the processor 120 generates a representative value (eg, maximum value, minimum value, average value, median value, etc.) after removing the DC component from the measured waveform, and takes the reciprocal of the representative value to determine at least two wavelength bands. Each absorbance can be calculated.

The processor 120 may determine that a person is wearing the electronic device 101 when the oxygen saturation is within a preset range.

The processor 120 may determine that the electronic device 101 is not worn by a person when the value of the DC component is less than a preset reference value or the oxygen saturation is not within a preset range.

The display module 160 may output a result of determining whether the person is wearing it on a screen under the control of the processor 120, and if the person is not wearing it, the display module 160 may prompt the person to wear it under the control of the processor 120. Guide information can be output through the screen.

Also, the display module 160 can visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor set to detect a touch or a pressure sensor set to measure the strength of a force generated by a touch.

The memory 130 may store data measured through the photoplethysmography sensor 172 . The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 171) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, program 140) and commands related thereto. The memory 130 may include volatile memory 132 or non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

1 and 2, in a network environment 100, an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-distance wireless communication network) or a second network. 199 (eg, a long-distance wireless communication network) to communicate with the electronic device 104 or the server 108.

The processor 120, for example, executes software (eg, the program 140) to cause at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or calculations. According to one embodiment, as at least part of data processing or operation, the processor 120 transfers commands or data received from other components (eg, sensor module 171 or communication module 190) to volatile memory 132. , processing commands or data stored in the volatile memory 132 , and storing resultant data in the non-volatile memory 134 . According to one embodiment, the processor 120 may include a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit ( NPU: neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, when the electronic device 101 includes the main processor 121 and the auxiliary processor 123, the auxiliary processor 123 may use less power than the main processor 121 or be set to be specialized for a designated function. can The secondary processor 123 may be implemented separately from or as part of the main processor 121 .

The secondary processor 123 may, for example, take the place of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, running an application). ) state, together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 171, or the communication module 190) It is possible to control at least some of the related functions or states. According to one embodiment, the auxiliary processor 123 (eg, image signal processor or communication processor) may be implemented as part of other functionally related components (eg, camera module 180 or communication module 190). there is. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where artificial intelligence is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning or reinforcement learning, but in the above example Not limited. The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the foregoing, but is not limited to the foregoing examples. The artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.

The input module 150 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. A receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The audio module 170 may convert sound into an electrical signal or vice versa. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device connected directly or wirelessly to the electronic device 101 (eg: Sound may be output through the electronic device 102 (eg, a speaker or a headphone).

The sensor module 171 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environment state (eg, a user state), and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 171 may include, for example, a photoplethysmography sensor 172, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, and an IR sensor. (infrared) sensor, biosensor, temperature sensor, humidity sensor, or light sensor may be included.

The interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device 101 to an external electronic device (eg, the electronic device 102). According to one embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the electronic device 102). According to one embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to one embodiment, the power management module 188 may be implemented as at least part of a power management integrated circuit (PMIC), for example.

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). Establishment and communication through the established communication channel may be supported. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : a local area network (LAN) communication module or a power line communication module). Among these communication modules, a corresponding communication module is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, a legacy communication module). It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a telecommunications network such as a computer network (eg, a LAN or a WAN). These various types of communication modules may be integrated as one component (eg, a single chip) or implemented as a plurality of separate components (eg, multiple chips). The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199. The electronic device 104 may be identified or authenticated.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, NR access technology (new radio access technology). NR access technologies include high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and access of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low latency (URLLC)). -latency communications)) can be supported. The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 uses various technologies for securing performance in a high frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), and full-dimensional multiplexing. Technologies such as input/output (FD-MIMO: full dimensional MIMO), array antenna, analog beam-forming, or large scale antenna may be supported. The wireless communication module 192 may support various requirements defined for the electronic device 101, an external electronic device (eg, the electronic device 104), or a network system (eg, the second network 199). According to one embodiment, the wireless communication module 192 is a peak data rate for eMBB realization (eg, 20 Gbps or more), a loss coverage for mMTC realization (eg, 164 dB or less), or a U-plane latency for URLLC realization (eg, Example: downlink (DL) and uplink (UL) each of 0.5 ms or less, or round trip 1 ms or less) may be supported.

The antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device). According to one embodiment, the antenna module 197 may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is selected from a plurality of antennas by the communication module 190, for example. It can be. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through at least one selected antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module 197 in addition to the radiator.

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module includes a printed circuit board, an RFIC disposed on or adjacent to a first surface (eg, bottom surface) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band), and It may include a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second surface (eg, a top surface or a side surface) of the printed circuit board and capable of transmitting or receiving signals of a designated high frequency band. .

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 instead of executing the function or service by itself. Alternatively or additionally, one or more external electronic devices may be requested to perform the function or at least part of the service. One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 . The electronic device 101 may provide the result as at least part of a response to the request as it is or after additional processing. To this end, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 . The electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

3 is a front perspective view of an electronic device according to an exemplary embodiment. 4 is a rear perspective view of an electronic device according to an exemplary embodiment.

Referring to FIGS. 3 and 4 , the electronic device 300 (eg, the electronic device 101 of FIGS. 1 and 2 ) according to an embodiment has a first surface (or front surface) 310A and a second surface. (or back) 310B, and a housing 310 including a side surface 310C surrounding a space between the first surface 310A and the second surface 310B, and connected to at least a portion of the housing 310 and binding members 350 and 360 configured to detachably attach the electronic device 300 to a part of the user's body (eg, wrist, ankle, etc.). In another embodiment (not shown), the housing may refer to a structure forming some of the first face 310A, the second face 310B, and the side face 310C of FIG. 2A . According to one embodiment, the first surface 310A may be formed by a front plate 301 (eg, a glass plate or a polymer plate including various coating layers) that is substantially transparent at least in part. The second face 310B may be formed by the substantially opaque back plate 307 . Back plate 307 may be formed, for example, of coated or tinted glass, ceramic, polymer, metal (eg, aluminum, stainless steel (STS), or magnesium), or a combination of at least two of these materials. there is. The side surface 310C is coupled to the front plate 301 and the back plate 307 and may be formed by a side bezel structure (or "side member") 306 including metal and/or polymer. In some embodiments, the back plate 307 and the side bezel structure 306 may be integrally formed and include the same material (eg, a metal material such as aluminum). The binding members 350 and 360 may be formed of various materials and shapes. Integral and plurality of unit links may be formed to flow with each other by a combination of at least two of woven material, leather, rubber, urethane, metal, ceramic, or materials.

According to an embodiment, the electronic device 300 includes a display 320 (see FIG. 5), audio modules 305 and 308, a sensor module 371, key input devices 302, 303 and 304, and a connector hole ( 309) may include at least one or more. In some embodiments, the electronic device 300 omits at least one of the components (eg, the key input devices 302, 303, 304, the connector hole 309, or the sensor module 371) or has other components. Additional elements may be included.

The display 320 may be exposed through a substantial portion of the front plate 301 , for example. The shape of the display 320 may be a shape corresponding to the shape of the front plate 301, and may have various shapes such as a circle, an ellipse, or a polygon. The display 320 may be combined with or disposed adjacent to a touch sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and/or a fingerprint sensor.

The audio modules 305 and 308 may include a microphone hole 305 and a speaker hole 308 . A microphone for acquiring external sound may be disposed inside the microphone hole 305, and in some embodiments, a plurality of microphones may be disposed to detect the direction of sound. The speaker hole 308 can be used as an external speaker and a receiver for a call. In some embodiments, the speaker hole 308 and the microphone hole 305 may be implemented as one hole, or a speaker may be included without the speaker hole 308 (eg, a piezo speaker).

The sensor module 371 may generate an electrical signal or data value corresponding to an internal operating state of the electronic device 300 or an external environmental state. The sensor module 371 may include, for example, a biometric sensor module 371 (eg, an HRM sensor) disposed on the second surface 310B of the housing 310 . The electronic device 300 includes a sensor module (not shown), for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, At least one of a humidity sensor and an illuminance sensor may be further included.

The sensor module 371 may include electrode regions 313 and 314 forming a part of the surface of the electronic device 300 and a biosignal detection circuit (not shown) electrically connected to the electrode regions 313 and 314. there is.

For example, the electrode regions 313 and 314 may include a first electrode region 313 and a second electrode region 314 disposed on the second surface 310B of the housing 310 . The sensor module 371 may be configured such that the electrode areas 313 and 314 obtain an electrical signal from a part of the user's body, and the biosignal detection circuit detects the user's biometric information based on the electrical signal.

In addition, the sensor module 371 may include a photoplethysmography sensor (for example, the photoplethysmography sensor 172 of FIGS. 1 and 2) capable of measuring blood oxygen saturation (SpO2) using infrared and visible light. there is. The sensor module 371 may include a light source unit 371 that emits infrared rays and visible rays and a plurality of light receiving sensors 372 to 379.

The key input devices 302, 303, and 304 include a wheel key 302 disposed on a first surface 310A of the housing 310 and rotatable in at least one direction, and/or a side surface 310C of the housing 310. ) may include side key buttons 303 and 304 disposed on. The wheel key may have a shape corresponding to the shape of the front plate 302 . In another embodiment, the electronic device 300 may not include some or all of the key input devices 302, 303, and 304 mentioned above, and the key input devices 302, 303, and 304 that are not included may display ( 320) may be implemented in other forms such as soft keys. The connector hole 309 may accommodate a connector (eg, a USB connector) for transmitting and receiving power and/or data to and from an external electronic device and a connector for transmitting and receiving an audio signal to and from an external electronic device. Other connector holes (not shown) may be included. The electronic device 300 may further include, for example, a connector cover (not shown) that covers at least a portion of the connector hole 309 and blocks external foreign substances from entering the connector hole.

The binding members 350 and 360 may be detachably attached to at least a partial area of the housing 310 using the locking members 351 and 361 . The fastening members 350 and 360 may include one or more of a fixing member 352 , a fixing member fastening hole 353 , a band guide member 354 , and a band fixing ring 355 .

The fixing member 352 may be configured to fix the housing 310 and the fastening members 350 and 360 to a part of the user's body (eg, a wrist or an ankle). The fixing member fastening hole 353 corresponds to the fixing member 352 to fix the housing 310 and the fastening members 350 and 360 to a part of the user's body. The band guide member 354 is configured to limit the movement range of the fixing member 352 when the fixing member 352 is fastened with the fixing member fastening hole 353, so that the fastening members 350 and 360 are attached to a part of the user's body. It can be tightly bonded. The band fixing ring 355 may limit the movement range of the fastening members 350 and 260 in a state in which the fixing member 352 and the fixing member fastening hole 353 are fastened.

5 is an exploded perspective view of an electronic device according to an exemplary embodiment.

Referring to FIG. 5 , an electronic device 500 (eg, the electronic device 101 of FIGS. 1 and 2 or the electronic device 300 of FIGS. 3 and 4 ) includes a side bezel structure 510 and a wheel key 520 ), front plate 301, display 320, first antenna 550, second antenna 555, support member 560 (eg bracket), battery 570, printed circuit board 580, A sealing member 590 , a back plate 593 , and binding members 595 and 597 may be included. At least one of the components of the electronic device 500 may be the same as or similar to at least one of the components of the electronic device 300 of FIG. 1 or 2 , and duplicate descriptions are omitted below. The support member 560 may be disposed inside the electronic device 500 and connected to the side bezel structure 510 or integrally formed with the side bezel structure 510 . The support member 560 may be formed of, for example, a metal material and/or a non-metal (eg, polymer) material. The support member 560 may have the display 320 coupled to one surface and the printed circuit board 580 coupled to the other surface. A processor, memory, and/or interface may be mounted on the printed circuit board 580 . In addition, the light source unit 371 and the light receiving unit may be disposed on the printed circuit board 580 . At this time, the light source unit 371 may use a plurality of light sources, and the light receiving unit may include a plurality of light receiving sensors 372-379. In addition, a dome-shaped window 591 may be disposed on a skin contact surface above or below the rear housing 593 . The processor may include, for example, one or more of a central processing unit, an application processor, a graphic processing unit (GPU), an application processor, a sensor processor, or a communication processor.

Memory may include, for example, volatile memory or non-volatile memory. The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface), an SD card interface, and/or an audio interface. The interface may, for example, electrically or physically connect the electronic device 500 with an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector.

The battery 570 is a device for supplying power to at least one component of the electronic device 500, and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. there is. At least a portion of the battery 570 may be disposed on a substantially coplanar surface with the printed circuit board 580 , for example. The battery 570 may be integrally disposed inside the electronic device 300 or may be disposed detachably from the electronic device 300 .

The first antenna 550 may be disposed between the display 320 and the support member 560 . The first antenna 550 may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The first antenna 550 may, for example, perform short-range communication with an external device, wirelessly transmit/receive power required for charging, and transmit a short-range communication signal or a magnetic-based signal including payment data. . In another embodiment, the antenna structure may be formed by a part of the side bezel structure 510 and/or the support member 560 or a combination thereof.

The second antenna 555 may be disposed between the printed circuit board 580 and the back plate 593 . The second antenna 555 may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The second antenna 555 may, for example, perform short-range communication with an external device, wirelessly transmit/receive power required for charging, and transmit a short-range communication signal or a self-based signal including payment data. . In another embodiment, the antenna structure may be formed by a part of the side bezel structure 510 and/or the back plate 593 or a combination thereof.

The sealing member 590 may be positioned between the side bezel structure 510 and the rear plate 593 . The sealing member 590 may be configured to block moisture and foreign substances from entering into the space surrounded by the side bezel structure 510 and the back plate 593 from the outside.

Hereinafter, the method according to the present invention configured as described above will be described with reference to the drawings below.

6 is a flowchart illustrating an example of a process of determining whether an electronic device is worn by a person according to an embodiment.

Referring to FIG. 6 , when the electronic device 101 detects that a wearing confirmation event has occurred (610), it irradiates light sources of at least two wavelength bands (612). At this time, the occurrence of the wearing confirmation event occurs, for example, when infrared light is sent and it is confirmed that the intensity of light is absorbed and reduced when worn, or when an electrocardiogram (ECG) sensor is included in the electronic device 101, the electrocardiogram sensor It can be sensed through the case of detecting the contact of the electrocardiogram sensor with the skin by measuring the change in current.

In this case, at least one of the two wavelength bands may have a wavelength smaller than 800 nm, and at least one of the at least two wavelength bands may have a wavelength larger than 800 nm. Here, a detailed description of at least two wavelength bands will be described later with reference to FIG. 9 .

Then, the electronic device 101 measures the reflected light of each wavelength band (614).

Then, the electronic device 101 calculates absorbance of each of at least two wavelength bands based on the measured waveform (618). More specifically, the electronic device 101 generates a representative value (eg, maximum value, minimum value, average value, median value, etc.) after removing the DC component from the measured waveform, takes the reciprocal of the representative value, and obtains at least 2 The absorbance of each of the two wavelength bands can be calculated. Here, a detailed description of the DC component and the AC component will be described later with reference to FIG. 10 .

Then, the electronic device 101 calculates the oxygen saturation (SpO 2 ) using absorbances of each of at least two wavelength bands (620).

Then, the electronic device 101 checks whether the oxygen saturation is within a preset range (622). At this time, a predetermined range of oxygen saturation for determining whether or not there is a person may be 95% to 100%.

As a result of checking in step 622, if the oxygen saturation is within the preset range, the electronic device 101 determines that the electronic device 101 is worn by a person (624). In this case, the electronic device 101 may provide the determination result of operation 624 to the application that generated the wearing confirmation event, display that the electronic device 101 is worn by a person through a display module, or display a message informing that the electronic device is worn by a person.

As a result of checking in step 622, if the oxygen saturation is not within the preset range, the electronic device 101 determines that the electronic device 101 is not worn by a person (626). In this case, the electronic device 101 may provide the determination result of operation 626 to the application that generated the wearing confirmation event. Alternatively, the electronic device 101 may output through a display that the electronic device 101 is not worn by the person and output a wearing recommendation message inducing the person to wear it.

7 is a flowchart illustrating another example of a process of checking whether an electronic device is worn by a person according to an embodiment.

Referring to FIG. 7 , when the electronic device 101 detects that a wearing confirmation event has occurred (710), it irradiates light sources of at least two wavelength bands (712). At this time, the occurrence of the wearing confirmation event occurs, for example, when infrared light is sent and it is confirmed that the intensity of light is absorbed and reduced when worn, or when an electrocardiogram (ECG) sensor is included in the electronic device 101, the electrocardiogram sensor It can be sensed when it is sensed that the electrocardiogram sensor is in contact with the skin by measuring the current change through the sensor.

In this case, at least one of the two wavelength bands may have a wavelength smaller than 800 nm, and at least one of the at least two wavelength bands may have a wavelength larger than 800 nm. Here, a detailed description of at least two wavelength bands will be described later with reference to FIG. 9 .

Then, the electronic device 101 measures the reflected light of each wavelength band (714).

Then, the electronic device 101 checks the DC component of the measured waveform and checks whether the value of the DC component is smaller than a preset reference value (716). Here, a detailed description of the DC component and the AC component will be described later with reference to FIG. 10 .

As a result of checking in step 716, if the value of the DC component is smaller than the predetermined reference value, the electronic device 101 determines that the electronic device 101 is not worn by a person (726).

As a result of checking in step 716, if the value of the DC component is equal to or greater than the predetermined reference value, the electronic device 101 calculates absorbance of each of at least two wavelength bands based on the measured waveform (718). More specifically, the electronic device 101 generates a representative value (eg, maximum value, minimum value, average value, median value, etc.) after removing the DC component from the measured waveform, takes the reciprocal of the representative value, and obtains at least 2 The absorbance of each of the two wavelength bands can be calculated.

Then, the electronic device 101 calculates the oxygen saturation (SpO 2 ) using absorbances of each of at least two wavelength bands (720).

Then, the electronic device 101 checks whether the oxygen saturation is within a preset range (722). At this time, a predetermined range of oxygen saturation for determining whether or not there is a person may be 95% to 100%.

As a result of checking in step 722, if the oxygen saturation is within the preset range, the electronic device 101 determines that the electronic device 101 is worn by a person (724). In this case, the electronic device 101 may provide the determination result of operation 724 to the application that generated the wearing confirmation event, display that the electronic device 101 is worn by a person through a display module, or display a message informing that the electronic device is worn by a person.

As a result of checking in step 722, if the oxygen saturation is not within the predetermined range, the electronic device 101 determines that the electronic device 101 is not worn by a person (726). In this case, the electronic device 101 may provide the determination result of operation 626 to the application that generated the wearing confirmation event. Alternatively, the electronic device 101 may output through a display that the electronic device 101 is not worn by the person and output a wearing recommendation message inducing the person to wear it.

8 is a flowchart illustrating a process of calculating oxygen saturation in an electronic device according to an exemplary embodiment.

Referring to FIG. 8 , the electronic device 101 may further specify operations 620 and 720 as follows.

The electronic device 101 calculates the concentration of oxyhemoglobin and dioxyhemoglobin by applying the absorbance of each of the at least two wavelength bands to a preset equation corresponding to each wavelength band (810).

In operation 810, the following <Equation 1> may be used as a predetermined equation used to calculate the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin.

[Equation 1]

here, Is the absorption coefficient of each wavelength band. thus, is the absorption in the wavelength range of 760 nm, is the absorbance in the wavelength range of 925 nm. is the extinction coefficient of oxyhemoglobin in each wavelength band, is the extinction coefficient of dioxyhemoglobin in each wavelength band, is the concentration of oxy-hemoglobin, is the concentration of dioxy-hemoglobin, and the baseline is the value of the DC component in each wavelength band.

Then, the electronic device 101 calculates oxygen saturation using the concentrations of oxyhemoglobin and dioxyhemoglobin (820).

In operation 820, the electronic device 101 may calculate the concentration of oxyhemoglobin by dividing the concentration of oxyhemoglobin by the sum of the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin as shown in Equation 2 below.

[Equation 2]

Oxygen saturation =

Here, Oxygen saturation is oxygen saturation, is the concentration of oxy-hemoglobin, is the concentration of dioxin hemoglobin (Deoxy-hemoglobin)

9 is a diagram illustrating an example of two wavelength bands set to calculate oxygen saturation in an electronic device according to an embodiment.

Referring to FIG. 9 , when light of each wavelength band is irradiated to a person, the densities of light absorbed by dioxyhemoglobin 911 , oxyhemoglobin 912 , and water 913 can be confirmed.

The electronic device 101 generates dioxyhemoglobin 911 before and after the 800 nm wavelength where the optical density of oxyhemoglobin 912 and the optical density of dioxyhemoglobin 911 intersect and the size is reversed. Select at least two (920, 930) wavelength bands of red and infrared (IR) wavelengths where the values of the optical density of and oxyhemoglobin 912 are close to the peak, and transmit light to the human body as a light source. After irradiation, the remaining reflectance after being absorbed can be measured and used for oxygen saturation calculation.

Although two wavelength bands are selected in FIG. 9 , it is not limited to two, and three or more may be selected.

10 is a diagram illustrating components of an optical signal measured in blood vessels and tissues through an optical plethysmography sensor according to an exemplary embodiment.

Referring to FIG. 10 , the components of the optical signal measured by the photoplethysmography sensor 172 include pulsatile arterial blood 1010, non-pulsatile arterial blood 1020, and venous blood (1020). Venous blood 1030 and tissue 1040 may be included.

The waveform of the optical signal measured by the photoplethysmography sensor 172 can be classified into a DC component that does not fluctuate within a certain time interval and an AC component that fluctuates (periodically or aperiodically), and the DC component is non-pulse. It includes sinus arterial blood 1020, venous blood 1030 and tissue 1040, and the AC component may include pulsatile arterial blood 1010.

Using the electronic device 101 of this document described above, when several people use an application (eg, Together app) that competes by sharing their exercise amount, a subject wearing the electronic device 101 for measuring the exercise amount confirm that you are human

A certification mark may be marked on a user whose identity is confirmed to confirm fair competition.

In addition, when user authentication such as Samsung Pay is required, whether or not the user is wearing the electronic device 101 may be applied to additional authentication and used for two-factor authentication.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may store program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. Software may be distributed on networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

101: electronic device
120: processor
172: photoplethysmography sensor
130: memory
160: display module

Claims (20)

irradiating light sources of at least two wavelength bands;
measuring reflected light of each wavelength band;
calculating an absorbance of each of the at least two wavelength bands based on the measured waveform;
calculating oxygen saturation using the absorbance of each of the at least two wavelength bands; and
Checking whether or not the electronic device is worn based on whether the oxygen saturation is within a preset range
A method for determining whether an electronic device including a is worn.
According to claim 1,
The operation of calculating the absorbance of each of the at least two wavelength bands based on the measured waveform,
Calculating the absorbance of each of the at least two wavelength bands by removing the DC component from the measured waveform, finding the maximum value, and calculating the reciprocal of the maximum value
How to check if an electronic device is worn or not.
According to claim 1,
Prior to the operation of calculating the absorbance of each of the at least two wavelength bands,
An operation of checking the DC component of the measured waveform and checking whether the value of the DC component is smaller than a preset reference value.
Including more,
If the value of the DC component is greater than or equal to a predetermined reference value, performing an operation of calculating the absorbance of each of the at least two wavelength bands
How to check if an electronic device is worn or not.
According to claim 3,
If the value of the DC component is less than a preset reference value, determining that the electronic device is not worn by a person
A method for determining whether or not worn in an electronic device further comprising a.
According to claim 1,
The operation of calculating the oxygen saturation using the absorbance of each of the at least two wavelength bands,
calculating a concentration of oxyhemoglobin and a concentration of dioxyhemoglobin by applying the absorbance of each of the at least two wavelength bands to a preset equation corresponding to each wavelength band; and
Calculating the oxygen saturation using the concentration of the oxyhemoglobin and the concentration of the dioxyhemoglobin
A method for determining whether an electronic device including a is worn.
According to claim 5,
The operation of calculating the oxygen saturation using the concentration of the oxyhemoglobin and the concentration of the dioxyhemoglobin,
Calculated by dividing the concentration of oxyhemoglobin by the sum of the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin
How to check if an electronic device is worn or not.
According to claim 1,
The operation of checking whether or not the electronic device is worn based on whether the oxygen saturation is within a predetermined range,
If the oxygen saturation is within a predetermined range, it is determined that the electronic device is worn by a person.
How to check if an electronic device is worn or not.
According to claim 1,
The operation of checking whether or not the electronic device is worn based on whether the oxygen saturation is within a predetermined range,
If the oxygen saturation is not included in a predetermined range, determining that the electronic device is not worn by a person and providing a wearing recommendation message to the user
How to check if an electronic device is worn or not.
According to claim 1,
At least one wavelength among the at least two wavelength bands,
With a wavelength less than 800 nm,
At least one wavelength among the at least two wavelength bands,
with a wavelength greater than 800 nm
How to check if an electronic device is worn or not.
A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 9 is recorded.
a photoplethysmography sensor that irradiates light sources of at least two wavelength bands and measures reflected light of each wavelength band; and
Calculate the absorbance of each of the at least two wavelength bands based on the measured waveform, calculate the oxygen saturation using the absorbance of each of the at least two wavelength bands, and determine whether the oxygen saturation is within a preset range. Processor that checks whether the device is worn or not
An electronic device comprising a.
According to claim 11,
the processor,
When calculating the absorbance of each of the at least two wavelength bands,
Calculating the absorbance of each of the at least two wavelength bands by removing the DC component from the measured waveform, finding the maximum value, and calculating the reciprocal of the maximum value
electronic device.
According to claim 11,
the processor,
Before calculating the absorbance of each of the at least two wavelength bands,
Check the DC component of the measured waveform, check whether the value of the DC component is less than a preset reference value, and if the value of the DC component is equal to or greater than the preset reference value, determine the absorbance of each of the at least two wavelength bands. calculating
electronic device.
According to claim 13,
the processor,
When the value of the DC component is less than a predetermined reference value, determining that the electronic device is not worn by a person
electronic device.
According to claim 11,
the processor,
Calculate the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin by applying the absorbance of each of the at least two wavelength bands to a predetermined equation corresponding to each wavelength band, and using the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin to calculate the oxygen saturation
electronic device.
According to claim 15,
the processor,
Calculating the oxygen saturation by dividing the concentration of oxyhemoglobin by the sum of the concentration of oxyhemoglobin and the concentration of dioxyhemoglobin
electronic device.
According to claim 11,
the processor,
If the oxygen saturation is within a predetermined range, it is determined that the electronic device is worn by a person.
electronic device.
According to claim 11,
the processor,
determining that a person is not wearing the electronic device when the oxygen saturation is not within a predetermined range.
electronic device.
According to claim 18,
Further comprising a display module,
the processor,
Providing a wearing recommendation message to the user through the display module when it is determined that the electronic device is not worn by the person
electronic device.
According to claim 11,
At least one wavelength among the at least two wavelength bands,
With a wavelength less than 800 nm,
At least one wavelength among the at least two wavelength bands,
with a wavelength greater than 800 nm
electronic device.

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