Electronic device and method for recognizing body temperature of user

Abstract

In accordance with an embodiment, an electronic device includes a photoplethysmogram (PPG) sensor, a temperature sensor, a memory, and a processor. The processor is configured to store first information about a blood flow volume of a user in association with second information about a temperature of a part of a body of the user. The processor is configured to change a state of the temperature sensor from an enabled state to a disabled state. The processor is configured to identify that a first value indicative of a user's blood flow is outside a first range. The processor is configured to change a state of the temperature sensor from a disabled state to an enabled state. The processor is configured to identify that a second value indicative of a temperature of the part of the body is outside a second range established based on the second information. The processor is configured to provide a notification based on identifying that the second value is outside the second range.

Description

Technical Field

[0001] The present invention relates to an electronic device and method for identifying the body temperature of its user. Background Art

[0002] Electronic devices are being used to provide a variety of medical services. The electronic device may be configured to be worn by a user, such as a watch or glasses. The electronic device can obtain data about the user when worn by the user to identify the user's health condition. The electronic device can provide various services based on the identified health condition. For example, the electronic device can use multiple sensors to identify the biometric information of the user. Based on the identified biometric information of the user, the electronic device can identify various activity states of the user.

[0003] The above information is presented as relevant art only to assist in understanding the present disclosure. No determination has been made, nor is any assertion made, as to whether any of the above might be applicable as prior art to the present disclosure. Summary of the Invention

[0004] According to an embodiment, an electronic device may include: a photoplethysmography (PPG) sensor, a temperature sensor, a memory, and a processor operatively coupled to the PPG sensor, the temperature sensor, and the memory. The processor may be configured to store, in the memory, first information about the user's blood flow obtained using the PPG sensor and second information about the temperature of a part of the user's body obtained using the temperature sensor in an associated manner. The processor may be configured to change the state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The processor may be configured to identify that a first value representing the user's blood flow is outside a first range set based on the first information based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state. The processor may be configured to change the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The processor may be configured to identify that a second value representing the temperature of the part of the user's body identified using the temperature sensor changed to the active state is outside a second range set based on the second information. The processor may be configured to provide a notification in response to identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0005] According to an embodiment, an electronic device may include: a temperature sensor, a communication circuit, a memory, and a processor operably coupled to the temperature sensor, the communication circuit, and the memory. The processor may be configured to obtain first information about a user's blood flow from an external electronic device connected to the electronic device. The processor may be configured to store the first information about the user's blood flow and second information about the temperature of a part of the user's body obtained using the temperature sensor in the memory in an associated manner. The processor may be configured to change the state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The processor may be configured to identify that a first value representing the user's blood flow received from the external electronic device for monitoring the user's blood flow is outside a first range set based on the first information, based on the state that the temperature sensor remains in the inactive state. The processor may be configured to change the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The processor may be configured to identify that a second value representing the temperature of the part of the user's body identified using the temperature sensor changed to the active state is outside a second range set based on the second information. The processor may be configured to provide a notification based on identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0006] According to an embodiment, a method of operating an electronic device may include storing, in a memory of the electronic device, first information about a user's blood flow obtained using a photoplethysmography (PPG) sensor of the electronic device and second information about the temperature of a part of the user's body obtained using a temperature sensor of the electronic device in an associated manner. The method may include changing the state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The method may include identifying that a first value representing the user's blood flow is outside a first range set based on the first information, based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state. The method may include changing the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The method may include identifying that a second value representing the temperature of the part of the user's body identified using the temperature sensor changed to the active state is outside a second range set based on the second information, the second value. The method may include providing a notification in response to identifying that the second value representing the temperature of the part of the user's body is outside the second range. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In connection with the drawings, the above and other aspects, features, and advantages of certain embodiments of the present disclosure will become more apparent from the following detailed description, in which: Figure 1 is a block diagram of an electronic device in a network environment according to an embodiment.

[0008] Figure 2a and Figure 2b are a front perspective view and a rear perspective view of an exemplary electronic device according to an embodiment, respectively.

[0009] Figure 3 is an exploded perspective view of an exemplary electronic device according to an embodiment.

[0010] Figure 4 is a partial cross-sectional view of an exemplary electronic device according to an embodiment.

[0011] Figure 5 is a block diagram showing an exemplary configuration of an exemplary electronic device according to an embodiment.

[0012] Figure 6a and Figure 6b are diagrams showing examples of changes in blood flow according to ambient temperature according to an embodiment.

[0013] Figure 7 is a flowchart showing an exemplary operation of an electronic device according to an embodiment.

[0014] Figure 8 is a diagram showing an example of a user's blood flow change trend according to an embodiment.

[0015] Figure 9 is a flowchart showing an exemplary operation of an exemplary electronic device according to an embodiment.

[0016] Figure 10 is a diagram showing an exemplary operation of an exemplary electronic device according to an embodiment.

[0017] Figure 11 is a flowchart showing an exemplary operation of an exemplary electronic device according to an embodiment. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The present disclosure may be embodied in many different forms and should not be construed as limited to the embodiments of the disclosure set forth herein. In the detailed description of the drawings, the same or similar components may be denoted by the same or similar reference numerals. In addition, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0019] Figure 1 is a block diagram showing an exemplary electronic device in a network environment according to an embodiment.

[0020] Referring to Figure 1, in network environment 100, electronic device 101 can communicate with electronic device 102 via the first network 198 (e.g., short-range wireless communication network), or communicate with at least one of electronic device 104 or server 108 via the second network 199 (e.g., long-range wireless communication network). According to an embodiment, electronic device 101 can communicate with electronic device 104 via server 108. According to an embodiment, electronic device 101 may include a processor 120, a memory 130, an input module 150, a sound output module 155, a display module 160, an audio module 170, a sensor module 176, an interface 177, a connection terminal 178, a haptic module 179, a camera module 180, a power management module 188, a battery 189, a communication module 190, a subscriber identity module (SIM) 196, or an antenna module 197. In some embodiments, at least one of the above components (e.g., connection terminal 178) may be omitted from electronic device 101, or one or more other components may be added to electronic device 101. In some embodiments, some of the above components (e.g., sensor module 176, camera module 180, or antenna module 197) may be implemented as a single integrated component (e.g., display module 160).

[0021] Processor 120 can run software (e.g., program 140) to control at least one other component (e.g., a hardware component or a software component) connected to processor 120 of electronic device 101, and can perform various data processing or calculations. According to an embodiment, as at least a part of the data processing or calculation, processor 120 can store commands or data received from another component (e.g., sensor module 176 or communication module 190) in volatile memory 132, process the commands or data stored in volatile memory 132, and store the resulting data in non-volatile memory 134. According to an example, processor 120 may include a main processor 121 (e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor 123 (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operationally independent of or combined with main processor 121. For example, when electronic device 101 includes main processor 121 and auxiliary processor 123, auxiliary processor 123 may be adapted to consume less power than main processor 121, or be adapted to be dedicated to a specific function. Auxiliary processor 123 may be implemented as separate from main processor 121, or as a part of main processor 121.

[0022] When the main processor 121 is in an inactive (e.g., sleep) state, the auxiliary processor 123 (instead of the main processor 121) may control at least some of the functions or states related to at least one of the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190), or when the main processor 121 is in an active state (e.g., running an application), the auxiliary processor 123 may control at least some of the functions or states related to at least one of the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190) together with the main processor 121. According to an embodiment, the auxiliary processor 123 (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module 180 or the communication module 190) that is functionally related to the auxiliary processor 123. According to an embodiment, the auxiliary processor 123 (e.g., a neural processing unit) may include a hardware structure dedicated to artificial intelligence model processing. The artificial intelligence model may be generated through machine learning. For example, such learning may be performed by the electronic device 101 where the artificial intelligence is executed or by a separate server (e.g., the server 108). The learning algorithm may include, but is not limited to, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include multiple artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), or a deep Q network, or a combination of two or more thereof, but is not limited thereto. Additionally or alternatively, the artificial intelligence model may include a software structure in addition to the hardware structure.

[0023] The memory 130 may store various data used by at least one component of the electronic device 101 (e.g., the processor 120 or the sensor module 176). The data may include, for example, software (e.g., the program 140) and input data or output data for commands related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134.

[0024] The program 140 may be stored in the memory 130 as software, and the program 140 may include, for example, an operating system (OS) 142, middleware 144, or an application 146.

[0025] The input module 150 may receive commands or data to be used by other components of the electronic device 101 (e.g., the processor 120) from the outside of the electronic device 101 (e.g., a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus).

[0026] The sound output module 155 may output a sound signal to the outside of the electronic device 101. The sound output module 155 may include, for example, a speaker or a receiver. The speaker may be used for general purposes such as playing multimedia or playing a record. The receiver may be used for receiving an incoming call. According to an embodiment, the receiver may be implemented separately from the speaker or as a part of the speaker.

[0027] The display module 160 may visually provide information to the outside of the electronic device 101 (e.g., to a user). The display device 160 may include, for example, a display, a holographic device, or a projector, and a control circuit for controlling a corresponding one of the display, the holographic device, and the projector. According to an example, the display module 160 may include a touch sensor adapted to detect a touch or a pressure sensor adapted to measure the intensity of a force caused by the touch.

[0028] The audio module 170 may convert sound into an electrical signal and vice versa. According to an embodiment, the audio module 170 may obtain sound through the input module 150, or output sound through the sound output module 155 or through headphones of an external electronic device (e.g., electronic device 102) directly (e.g., wiredly) or wirelessly connected to the electronic device 101.

[0029] The sensor module 176 may detect an operating state of the electronic device 101 (e.g., power or temperature) or an environmental state outside the electronic device 101 (e.g., a state of a user), and then generate an electrical signal or a data value corresponding to the detected state. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0030] The interface 177 may support one or more specific protocols used to directly (e.g., wiredly) or wirelessly connect the electronic device 101 to an external electronic device (e.g., electronic device 102). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface.

[0031] The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (e.g., electronic device 102). According to an example, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0032] The haptic module 179 may convert an electrical signal into a mechanical stimulus (e.g., vibration or motion) or an electrical stimulus that can be recognized by the user through his sense of touch or kinesthesia. According to an example, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0033] The camera module 180 may capture a still image or a moving image. According to an embodiment, the camera module 180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0034] The power management module 188 may manage the power supply to the electronic device 101. According to an example, the power management module 188 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

[0035] The battery 189 may supply power to at least one component of the electronic device 101. According to an example, the battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0036] The communication module 190 may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (e.g., the electronic device 102, the electronic device 104, or the server 108), and perform communication through the established communication channel. The communication module 190 may include one or more communication processors capable of operating independently of the processor 120 (e.g., an application processor (AP)), and support direct (e.g., wired) communication or wireless communication. According to an example, the communication module 190 may include a wireless communication module 192 (e.g., 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 (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). Each of these communication modules may communicate with an external electronic device through a first network 198 (e.g., a short-range communication network, such as Bluetooth™, Wi-Fi Direct, or Infrared Data Association (IrDA)) or a second network 199 (e.g., a long-range communication network, such as a traditional cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN))). These various types of communication modules may be implemented as a single component (e.g., a single chip), or these various types of communication modules may be implemented as multiple separate components (e.g., multiple chips). The wireless communication module 192 may identify and authenticate the electronic device 101 in a communication network (such as the first network 198 or the second network 199) using user information (e.g., an international mobile subscriber identity (IMSI)) stored in the user identification module 196.

[0037] The wireless communication module 192 may support 5G networks after 4G networks and next-generation communication technologies (e.g., New Radio (NR) access technology). The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communication (mMTC), or ultra-reliable low-latency communication (URLLC). The wireless communication module 192 may support high frequency bands (e.g., millimeter wave bands) to meet, for example, high data transfer rates. The wireless communication module 192 may support various technologies for ensuring performance on high frequency bands, such as, for example, beamforming, massive multiple-input multiple-output (massive MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, or massive antennas. The wireless communication module 192 may support various requirements specified in the electronic device 101, an external electronic device (e.g., the electronic device 104), or a network system (e.g., the second network 199). According to an example, the wireless communication module 192 may support a peak data rate for implementing eMBB (e.g., 20 Gbps or greater), a loss coverage for implementing mMTC (e.g., 164 dB or less), or a U-plane latency for implementing URLLC (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less).

[0038] The antenna module 197 may transmit a signal or power to the outside of the electronic device 101 (e.g., an external electronic device) or receive a signal or power from the outside of the electronic device 101 (e.g., an external electronic device). According to an example, the antenna module 197 may include an antenna, and the antenna may include a radiating element, and the radiating element may include a conductive material or a conductive pattern formed in a substrate (e.g., a printed circuit board (PCB)) or formed on the substrate. According to an example, the antenna module 197 may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication scheme to be used in a communication network (such as the first network 198 or the second network 199) may be selected from the plurality of antennas by, for example, the communication module 190 (e.g., the wireless communication module 192). Subsequently, a signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, additional components (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as a part of the antenna module 197.

[0039] According to an embodiment, the antenna module 197 may form a millimeter-wave antenna module. According to an example, the millimeter-wave antenna module may include a printed circuit board, a radio frequency integrated circuit (RFIC), and a plurality of antennas (e.g., an array antenna), where the RFIC is disposed on a first surface (e.g., a bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a specified high-frequency band (e.g., a millimeter-wave band), and the plurality of antennas are disposed on a second surface (e.g., a top surface or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals in the specified high-frequency band.

[0040] At least some of the above components may be interconnected via an inter-peripheral communication scheme (e.g., a bus, a general-purpose input / output (GPIO), a serial peripheral interface (SPI), or a mobile industry processor interface (MIPI)) and communicatively transmit signals (e.g., commands or data) therebetween.

[0041] According to an example, commands or data may be transmitted or received between the electronic device 101 and an external electronic device 104 via a server 108 connected to a second network 199. Each of the electronic device 102 or the electronic device 104 may be a device of the same type as the electronic device 101, or a device of a different type from the electronic device 101. According to an example, all or some of the operations running on the electronic device 101 may be run on one or more of the external electronic device 102, the external electronic device 104, or the server 108. For example, if the electronic device 101 is supposed to automatically execute a function or service or is supposed to execute a function or service in response to a request from a user or another device, the electronic device 101 may request one or more of the external electronic devices to execute at least a part of the function or service, instead of running the function or service, or in addition to running the function or service, the electronic device 101 may also request one or more of the external electronic devices to execute at least a part of the function or service. One or more of the external electronic devices that receive the request may execute the requested at least a part of the function or service, or execute an additional function or an additional service related to the request, and transmit the result of the execution to the electronic device 101.

[0042] The electronic device 101 may provide the result as at least part of a response to the request with or without further processing of the result. For this, cloud computing technology, distributed computing technology, mobile edge computing (MEC) technology, or client-server computing technology may be used, for example. The electronic device 101 may use, for example, distributed computing or mobile edge computing to provide an ultra-low latency service. In another example of the present disclosure, the external electronic device 104 may include an Internet of Things (IoT) device. The server 108 may be an intelligent server using machine learning and / or neural networks. According to an example, the external electronic device 104 or the server 108 may be included in the second network 199. The electronic device 101 may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology.

[0043] Figure 2a and Figure 2b are a front perspective view and a rear perspective view of an electronic device according to an embodiment, respectively.

[0044] Referring to Figure 2a and Figure 2b , according to an embodiment, an electronic device 200 (e.g., Figure 1 the electronic device 101) may include a housing 210 including a first surface (or front surface) 210A, a second surface (or rear surface) 210B, and a side surface 210C surrounding a space between the first surface 210A and the second surface 210B, and attachment members 250 and 260 (e.g., bands) connected to at least a part of the housing 210 and detachably coupling the electronic device 200 to a part (e.g., wrist, ankle, etc.) of a user's body. In an embodiment (not illustrated), the housing may refer to forming Figure 2a and Figure 2bThe structure of some of the first surface 210A, the second surface 210B, and the side surface 210C. According to an embodiment, at least a portion of the first surface 210A may be formed of a substantially transparent front plate 201 (e.g., a glass plate or a polymer plate including various coatings). The second surface 210B may be formed of a substantially opaque rear plate 207. For example, the rear plate 207 may be formed of coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of these materials. The side surface 210C may be formed of a side border structure (or "side member") 206 coupled to the front plate 201 and the rear plate 207 and including metal and / or polymer. In some embodiments, the rear plate 207 and the side border structure 206 may be integrally formed and may include the same material (e.g., a metal material such as aluminum). The binding members 250 and 260 may be formed of various materials and shapes. The one-piece unit link and the multiple unit links may be formed of woven fabric, leather, rubber, polyurethane, metal, ceramic, or a combination of at least two of the materials to flow with each other.

[0045] According to an embodiment, the electronic device 200 may include at least one of a display 220 (see Figure 3 ), an audio module (e.g., including an audio circuit) 205 and 208, a sensor module (e.g., including at least one sensor) 211, key input devices 202, 203, and 204, and a connector hole 209. In some embodiments, the electronic device 200 may omit at least one of the components (e.g., the key input devices 202, 203, and 204, the connector hole 209, or the sensor module 211), or may additionally include other components.

[0046] The display 220 may be visually exposed (e.g., visible) through most of the front plate 201, for example. The shape of the display 220 may be a shape corresponding to the shape of the front plate 201 and may have various shapes such as circular, oval, or polygonal. The display 220 may be coupled to or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring touch intensity (pressure), and / or a fingerprint sensor.

[0047] The audio modules 205 and 208 may include various audio circuits as well as a microphone hole 205 and a speaker hole 208. In the microphone hole 205, a microphone for obtaining external sound may be disposed inside, and in some embodiments, a plurality of microphones may be provided to detect the direction of sound. The speaker hole 208 may be used as an external speaker and a receiver for calls. In some embodiments, the speaker hole 208 and the microphone hole 205 may be implemented as one hole, or a speaker (e.g., a piezoelectric speaker) may be included without the speaker hole 208.

[0048] The sensor module 211 may include at least one sensor and generate an electrical signal or a data value corresponding to an internal operation state or an external environmental state of the electronic device 200. The sensor module 211 may include, for example, a biometric sensor module 211 (e.g., an HRM sensor) disposed on the second surface 210B of the housing 210. The electronic device 200 may further include at least one of sensor modules (not shown), such as a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0049] The sensor module 211 may include electrode regions 213 and 214 that form a part of the surface of the electronic device 200 and a bio-signal detection circuit (not shown) electrically connected to the electrode regions 213 and 214. For example, the electrode regions 213 and 214 may include a first electrode region 213 and a second electrode region 214 disposed on the second surface 210B of the housing 210. The sensor module 211 may be configured such that the electrode regions 213 and 214 obtain an electrical signal from a part of a user's body, and the bio-signal detection circuit detects the user's biometric information based on the electrical signal.

[0050] The key input devices 202, 203, and 204 may include a scroll wheel key 202 disposed on the first surface 210A of the housing 210 and rotatable in at least one direction, and / or side key buttons 203 and 204 disposed on the side surface 210C of the housing 210. The scroll wheel key may have a shape corresponding to the shape of the front plate 201. In an embodiment, the electronic device 200 may not include some or all of the key input devices 202, 203, and 204 described above, and the key input devices 202, 203, and 204 that are not included may be implemented in other forms, such as soft keys on the display 220. The connector hole 209 may accommodate a connector (e.g., a USB connector) for transmitting power and / or data to and receiving power and / or data from an external electronic device, and may include another connector hole (not shown) capable of accommodating a connector for transmitting and receiving an audio signal to and from an external electronic device. For example, the electronic device 200 may further include a connector cover (not shown) that covers at least a part of the connector hole 209 and blocks foreign substances from flowing into the connector hole.

[0051] The binding members 250 and 260 may be detachably attached to at least a part of the housing 210 using the locking members 251 and 261. The binding members 250 and 260 may include one or more of a fixing member 252, a fixing member fastening hole 253, a belt guiding member 254, and a belt fixing ring 255.

[0052] The fixing member 252 may be configured to fix the housing 210 and the binding members 250 and 260 to a part of a user's body (e.g., wrist, ankle, etc.). Correspondingly to the fixing member 252, the fixing member fastening hole 253 may fix the housing 210 and the binding members 250 and 260 to a part of a user's body. The belt guiding member 254 may be configured to limit the movement range of the fixing member 252 when the fixing member 252 is fastened to the fixing member fastening hole 253, and thus the binding members 250 and 260 may be tightly coupled to a part of a user's body. In a state where the fixing member 252 and the fixing member fastening hole 253 are fastened, the belt fixing ring 255 may limit the movement range of the binding members 250 and 260.

[0053] Figure 3 is an exploded perspective view of an exemplary electronic device according to an embodiment.

[0054] Referring to Figure 3 , the electronic device 300 (e.g., Figure 1 's electronic device 101 or Figures 2a to 2b 's electronic device 200) may include a side frame structure 310, a roller key 320, a front plate 201, a display 220, a first antenna 350, a second antenna 355, and a support member 360 (e.g., a bracket), a battery 370, a printed circuit board 380, a sealing member (e.g., a seal) 390, a rear plate 393, and binding members 395 and 397 (e.g., Figure 2a and Figure 2b 's binding members 250 and 260). At least one component of the electronic device 300 may be the same as or similar to at least one component of Figure 1 and Figures 2a to 2b 's electronic device 200, and its repeated description will be omitted. The support member 360 may be disposed inside the electronic device 300 to be connected to the side frame structure 310, or may be integrally formed with the side frame structure 310. The support member 360 may be formed of, for example, a metal material and / or a non-metal (e.g., polymer) material. In the support member 360, the display 220 may be coupled to one surface, and the printed circuit board 380 may be coupled to the other surface. A processor, a memory, and / or an interface may be mounted on the printed circuit board 380. The processor may include, for example, one or more of a central processing unit, a graphics processing unit (GPU), an application processor, a sensor processor, or a communication processor.

[0055] The 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. For example, the interface may electrically or physically connect the electronic device 300 to an external electronic device, and may include a USB connector, an SD card / MMC connector, or an audio connector.

[0056] The battery 370 is a device for supplying power to at least one component of the electronic device 300, and may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a part of the battery 370 may be disposed on substantially the same plane as, for example, the printed circuit board 380. The battery 370 may be integrally disposed within the electronic device 200, or may be detachably disposed from the electronic device 200.

[0057] The first antenna 350 may be disposed between the display 220 and the support member 360. The first antenna 350 may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. For example, the first antenna 350 may communicate with an external device over a short range, wirelessly transmit and receive power required for charging, and may transmit a short-range communication signal or a self-based magnetic signal including payment data. In an embodiment, the antenna structure may be formed by a part of the side border structure 310 and / or the support member 360, or a combination thereof.

[0058] The second antenna 355 may be disposed between the printed circuit board 380 and the rear plate 393. For example, the second antenna 355 may include a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. For example, the second antenna 355 may communicate with an external device over a short range, wirelessly transmit and receive power required for charging, and may transmit a short-range communication signal or a self-based magnetic signal including payment data. In an embodiment, the antenna structure may be formed by a part of the side border structure 310 and / or the rear plate 393, or a combination thereof.

[0059] The sealing member 390 may be located between the side border structure 310 and the rear plate 393. The sealing member 390 may be configured to prevent moisture and foreign substances from flowing into the space surrounded by the side border structure 310 and the rear plate 393.

[0060] Figure 4 is a partial cross-sectional view of an example electronic device according to an embodiment.

[0061] Referring to Figure 4 ,the electronic device 400 (e.g., Figure 1The electronic device 101) can be formed in a ring shape. For example, the housing 405 of the electronic device 400 can be formed in the shape of a ring that can be worn on a user's finger. Although Figure 4 the illustrated electronic device 400 in the form of a ring has a smooth surface, the present disclosure is not limited thereto. For example, the electronic device 400 can be implemented as a housing having a plurality of planes. For example, a ring-shaped electronic device 400 having a non-smooth surface can also be understood as an example embodiment of the present disclosure.

[0062] According to an embodiment, the ring-shaped housing 405 can include an outer surface that is exposed to the outside when worn by the user, an inner surface that contacts the user's body part, and a side surface between the outer surface and the inner surface. A space for accommodating at least one component, such as a processor (e.g., including processing circuitry) 411, a battery 412, a printed circuit board (PCB) 413, a photoplethysmogram (PPG) sensor 414, a temperature sensor 415, and / or a communication circuit 416, can be included between the inner surface and the outer surface of the housing 405. For example, the housing 405 can include a plurality of layers between the inner surface and the outer surface. For example, the components included in the electronic device 400 can be located in one layer or multiple layers and can be connected by a connecting structure such as a connecting member (not shown).

[0063] According to an embodiment, the electronic device 400 can include a housing 405, a processor 411, a battery 412, a printed circuit board (PCB) 413, a photoplethysmogram (PPG) sensor 414, a temperature sensor 415, and / or a communication circuit 416.

[0064] According to an embodiment, the PCB 413 can be disposed between the inner surface and the outer surface of the housing 405. For example, the processor 411, the battery 412, the PPG sensor 414, the temperature sensor 415, and / or the communication circuit 416 can be arranged on the PCB 413. For example, the PCB 413 can include a rigid region and a flexible region. In an example, the rigid region can be referred to as a rigid-flexible printed circuit board (RFPCB). In an example, the flexible region can be referred to as a flexible printed circuit board (FPCB).

[0065] According to an embodiment, the battery 412 can include at least one battery. The ring-shaped electronic device 400 may lack space for mounting the battery 412. The battery 412 can be configured such that at least one battery is connected in series and / or in parallel.

[0066] According to an embodiment, the electronic device 400 may include at least one sensor. For example, the electronic device 400 may include a PPG sensor 414 and / or a temperature sensor 415. The PPG sensor 414 and / or the temperature sensor 415 may be disposed toward the inner surface of the electronic device 400 to obtain biometric information about a part of the user's body (e.g., a finger).

[0067] For example, the PPG sensor 414 may be disposed in a layer between the inner surface and the outer surface toward a first part of the user's body. For example, the temperature sensor 415 may be disposed in a layer between the inner surface and the outer surface toward a second part of the user's body.

[0068] According to an embodiment, the electronic device 400 may include a communication circuit 416 for performing communication with an external electronic device. For example, the communication circuit 416 may be electrically connected to an antenna (or an antenna radiator) through a PCB 413.

[0069] Although not shown herein, the electronic device 400 may further include various other components in addition to the components shown herein. For example, the electronic device 400 may include a display. The display may be disposed on the outermost surface of the housing 405.

[0070] According to an embodiment, an electronic device (e.g., Figure 1 the electronic device 101, Figure 2a and Figure 2b the electronic device 200, Figure 3 the electronic device 300, and Figure 4 the electronic device 400) may be operable when worn on a user. The electronic device may use at least one sensor included in the electronic device to identify biometric information about the user (e.g., a pulse or body temperature). If one or more sensors included in the electronic device are all activated, their current consumption may increase, thus increasing the battery consumption in turn. Accordingly, the electronic device may change the state of at least one sensor to an active state based on specified conditions.

[0071] Hereinafter, an example operation of an electronic device according to an embodiment will be described. The electronic device described below may correspond to Figure 1 the electronic device 101, Figure 2a and Figure 2b the electronic device 200, Figure 3 the electronic device 300, and / or Figure 4 the electronic device 400. For example, the electronic device may be implemented in various forms that can be worn by a user, such as a smart watch, a smart bracelet, a smart ring, wireless earphones, or smart glasses.

[0072] Figure 5It is a block diagram showing an example configuration of an example electronic device according to an embodiment.

[0073] Referring to Figure 5 , the electronic device 500 may correspond to Figure 1 the electronic device 101 of Figure 2a and Figure 2b the electronic device 200 of Figure 3 the electronic device 300 of and / or Figure 4 the electronic device 400 of.

[0074] According to an embodiment, the electronic device 500 may include a processor (e.g., including processing circuitry) 510, a communication circuit 520, a sensor 530, and / or a memory 540. According to an embodiment, the electronic device 500 may include at least one of the processor 510, the communication circuit 520, the sensor 530, and / or the memory 540. For example, according to various embodiments, at least some of the processor 510, the communication circuit 520, the sensor 530, and / or the memory 540 may be omitted.

[0075] According to an embodiment, the processor 510 may include various processing circuits and correspond to Figure 1 the processor 120 of. The processor 510 may be operably coupled to or connected to the communication circuit 520, the sensor 530, and / or the memory 540. When the processor 510 is operably coupled to or connected to the communication circuit 520, the sensor 530, and / or the memory 540, it may mean, for example, that the processor 510 controls the communication circuit 520, the sensor 530, and / or the memory 540. For example, the communication circuit 520, the sensor 530, and / or the memory 540 may be controlled by the processor 510.

[0076] According to an embodiment, the processor 510 may include at least one processor. For example, the processor 510 may include a main processor for performing high - performance processing and an auxiliary sub - processor for performing low - power processing. At least some of the sensors 530 may be connected to the auxiliary processor. At least some of the sensors connected to the auxiliary processor may acquire data about the user 24 hours a day. According to an embodiment, depending on the state and / or operation of the electronic device 500, one of the main processor and the auxiliary processor may be activated. In an example, the auxiliary processor may be activated in a state where the battery power of the electronic device 500 is low. In an example, the main processor may be activated in a state where accurate data about the user is required.

[0077] According to an embodiment, the processor 510 may include hardware components for processing data based on one or more instructions. The hardware components for processing data may include, for example, an arithmetic and logic unit (ALU), a field - programmable gate array (FPGA), and / or a central processing unit (CPU).

[0078] According to an embodiment, the processor 510 may determine when the sensor 530 is actuated. The processor 510 may control the operation of the sensor 530. The processor 510 may process the information obtained from the sensor 530. For example, the processor 510 may use the sensor 530 to obtain (or identify) data about the user. Based on the obtained data about the user, the processor 510 may identify the user's body temperature. Hereinafter, an example of an operation in which the processor 510 obtains user data and identifies the user's body temperature based on the data will be described.

[0079] According to an embodiment, the electronic device 500 may include various communication circuits 520. The communication circuit 520 may correspond to Figure 1 at least a part of the communication module 190. For example, the communication circuit 520 may be used for various radio access technologies (RATs). For example, the communication circuit 520 may be used to perform Bluetooth communication or wireless local area network (WLAN) communication. For example, the communication circuit 520 may be used to perform cellular communication. For example, the processor 510 may establish a connection with an external electronic device through the communication circuit 520. For example, the processor 510 may use the communication circuit 520 to identify (or measure) the location of the electronic device 500 based on the received or transmitted wireless signals.

[0080] According to an embodiment, the electronic device 500 may include a sensor 530. The sensor 530 may be used to obtain various information. For example, the sensor 530 may be used to obtain data about the user's body. In an example, the sensor 530 may be used to acquire data about the user's body temperature, heart rate, and / or movement. For example, the sensor 530 may be configured by at least one sensor. The sensor 530 may include at least one sensor. For example, the sensor 530 may correspond to Figure 1 the sensor module 176.

[0081] The sensor 530 may include a biometric sensor. The sensor 530 may be used to identify (or detect) at least one of blood pressure, electrocardiogram, heart rate variability (HRV), heart rate monitor (HRM), photoplethysmogram (PPG), sleep interval, skin temperature, heart rate, blood flow, blood glucose, oxygen saturation, pulse wave, and / or electrocardiogram (ECG). For example, the processor 510 may obtain a waveform of a biometric signal through the sensor 530 based on PPG or ECG. For example, the biometric signal may include a photoplethysmogram, a pulse wave, or an electrocardiogram. Based on the waveform of the biometric signal, the processor 510 may identify at least one of blood pressure, HRV, HRM, skin temperature, blood flow, blood glucose, and oxygen saturation.

[0082] According to an embodiment, the sensor 530 may include a PPG sensor 531 and a temperature sensor 532.

[0083] The PPG sensor 531 can be used to measure the pulse (or the change in blood volume in the blood vessels) by identifying the change in the amount of photosensitive light that occurs according to the change in blood vessel volume. The PPG sensor 531 can include one or more photodiodes (PDs) and one or more light emitting diodes (LEDs). For example, the PPG sensor 531 can be used to identify the change in blood flow in the blood vessels during a heartbeat. When the optical sensor is in contact with the skin on the peripheral blood vessels, the PPG sensor 531 can identify the change in blood flow in the blood vessels caused by the heartbeat. Based on the PPG signal and waveform, the processor 510 can identify the blood flow volume and the change in blood flow volume.

[0084] For example, the PPG sensor 531 can include a transmissive PPG sensor and / or a reflective PPG sensor. In an example, the transmissive PPG sensor can output light to the user's skin through an LED (e.g., a green, red, or infrared (IR) LED). The transmissive PPG sensor can identify the light transmitted through the blood vessels through a photodiode (PD) disposed opposite the LED. The transmissive PPG sensor can identify the user's blood flow based on the intensity of the light transmitted through the blood vessels. In an example, the reflective PPG sensor can output light to the user's skin through an LED. The reflective PPG sensor can identify at least some of the light reflected by the blood vessels received by a PD disposed in substantially the same plane as the LED. Based on the intensity of the light reflected by the blood vessels, the reflective PPG sensor can identify the user's blood flow volume. For example, a variety of light sources, such as LEDs, can be used. For example, an LED of green light, which is the complementary color of the blood color, can be used.

[0085] The temperature sensor 532 can be used to identify (or measure) the skin temperature at a certain part of the user's body (e.g., the wrist or forehead). For example, the temperature sensor 532 can include a contact temperature sensor and a non-contact temperature sensing. For example, the skin temperature measured at a certain part of the user's body may be different from the user's body temperature. The processor 510 can calibrate the skin temperature measured at a certain part of the user's body (e.g., the wrist) to the user's body temperature. For example, the user's body temperature can refer to the temperature measured in a body cavity, such as the pulmonary artery, esophagus, bladder, ear canal, or rectum.

[0086] According to an embodiment, the temperature sensor 532 can operate in an active state based on a specified period.

[0087] For example, the activation of the temperature sensor 532 can mean that the temperature sensor 532 changes from a sleep state to a wake state. The deactivation of the temperature sensor 532 can mean that the temperature sensor 532 changes from a wake state to a sleep state.

[0088] For example, activation of the temperature sensor 532 may refer to, for example, the temperature sensor 532 sensing temperature. Deactivation of the temperature sensor 532 may refer to, for example, the temperature sensor 532 not sensing any temperature. For example, a period during which the state of the temperature sensor 532 changes from an activated (enabled) state to a deactivated (disabled) state may represent a sensing period.

[0089] Although not shown herein, the sensor 530 may also include various sensors for obtaining (or identifying, measuring, or detecting) various data about the user.

[0090] For example, the sensor 530 may include a proximity sensor. The proximity sensor can be used to identify whether an external object is closely approaching the electronic device 500. The proximity sensor may include a light-emitting component and a light-receiving component. The light-receiving component may be configured to receive infrared light reflected from an external object after the infrared light is emitted from the light-emitting component. The proximity sensor may be configured to identify the distance between the electronic device 500 (or the proximity sensor) and the external object based on the infrared light received by the light-receiving component.

[0091] For example, the sensor 530 may include a motion sensor. The motion sensor can be used to obtain data (e.g., motion values) about the motion of the electronic device 500 (or the user). In an example, the motion sensor may include an acceleration sensor, a gyroscope sensor, a geomagnetic sensor, or an atmospheric pressure sensor. The acceleration sensor can identify (or measure, detect) the acceleration of the electronic device 500 in three directions, such as the x-axis, y-axis, and z-axis. The gyroscope sensor can identify (or measure, detect) the angular velocity of the electronic device 500 in three directions of the x-axis, y-axis, and z-axis. The geomagnetic sensor can identify the geomagnetic field to identify (or measure, detect) the azimuth value. The atmospheric pressure sensor can identify (or measure, detect) the atmospheric pressure around the electronic device 500.

[0092] For example, the sensor 530 may include an HRV sensor. The processor 510 may measure the regularity or variability of the heart rate through the HRV sensor. The processor 510 may obtain information about the regularity or variability of the heart rate using the HRV sensor.

[0093] For example, the sensor 530 may include a blood glucose sensor. By identifying (or measuring) the current generated by the electrochemical reaction of glucose in the blood, the processor 510 can identify the blood glucose level of the user.

[0094] According to an embodiment, the electronic device 500 may include a memory 540. The memory 540 can be used to store information or data. For example, the memory 540 can be used to store data obtained from the user. For example, the memory 540 may correspond to Figure 1Memory 130. For example, memory 540 may be one or more volatile memory cells. For example, memory 540 may be one or more non-volatile storage units. In another example, memory 540 may be another form of computer-readable medium, such as a magnetic disk or an optical disc. For example, memory 540 may store data obtained based on operations performed on processor 510 (e.g., operations for executing a specific algorithm). For example, memory 540 may store data obtained from sensor 530 (e.g., body temperature data).

[0095] Figure 6a and Figure 6b is a diagram showing an example of the change in blood flow according to the ambient temperature according to an embodiment. Figure 6a may represent the blood flow in the body and capillaries when the ambient temperature is low. Figure 6b may represent the blood flow in the body and capillaries when the ambient temperature is high.

[0096] Referring Figure 6a , in state 610, the ambient temperature of the user may be low. For example, the ambient temperature may be lower than the user's body temperature. In the case where the skin temperature changes with the ambient temperature, body temperature can be maintained by the hypothalamus of the diencephalon and autonomic hormones. When the ambient temperature is lower than the user's body temperature, the blood flow near the skin, such as the blood flow in body 611, may decrease.

[0097] For example, when the ambient temperature is lower than the user's body temperature, the capillaries 612 near the skin 613 of the hand (or finger), which is the end of body 611, may constrict. As the capillaries 612 constrict, the blood flow can decrease, thereby reducing heat dissipation. The processor of the electronic device (e.g., Figure 5 the electronic device 500) (e.g., Figure 5 the processor 510) can use a PPG sensor facing the skin 613 (e.g., the PPG sensor 531 in Figure 5 ) to identify the decrease in blood flow. Based on the identified decreased blood flow, the processor 510 can identify the user's body temperature (or skin temperature).

[0098] Referring Figure 6b , in state 620, the ambient temperature of the user may be high. For example, the ambient temperature may be higher than the user's body temperature. In the case where the skin temperature changes with the ambient temperature, body temperature can be maintained by the hypothalamus of the diencephalon and autonomic hormones. In the case where the ambient temperature is higher than the user's body temperature, the blood flow near the skin, such as the blood flow in body 621, may increase.

[0099] For example, when the ambient temperature is higher than the user's body temperature, the blood capillaries 622 near the skin 623 of the hand (or finger), which is the end of the body 621, can relax. As the blood capillaries 622 relax, blood flow can increase, thereby increasing heat dissipation. The processor 510 of the electronic device 500 can use the PPG sensor 531 facing the skin 623 to identify the increased blood flow. Based on the identified increased blood flow, the processor 510 can identify the user's body temperature (or skin temperature).

[0100] Figure 7 is a flowchart showing an example operation of an example electronic device according to an embodiment.

[0101] In the following embodiments, each operation may be executed sequentially, but does not have to be executed sequentially. For example, the execution order of the operations can be changed, and at least two operations can be executed in parallel.

[0102] According to an embodiment, operations 710 to 770 can be understood to be executed by a processor (e.g., Figure 5 the processor 510) of an electronic device (e.g., Figure 5 the electronic device 500).

[0103] Referring to Figure 7 , in operation 710, the processor 510 can store the first information about the user's blood flow in association with the second information about the temperature of the part of the user's body. For example, the processor 510 can store the first information about the user's blood flow obtained using a PPG sensor (e.g., Figure 5 the PPG sensor 531) in association with the second information about the temperature of the part of the user's body obtained using a temperature sensor (e.g., Figure 5 the temperature sensor 532) in a memory (e.g., Figure 5 the memory 540).

[0104] According to an embodiment, the processor 510 can use the PPG sensor 531 to obtain the first information about the user's blood flow. For example, when the user is in a stable state (e.g., no user movement is detected, or movement below a threshold is detected), the processor 510 can use the PPG sensor 531 to obtain the first information about the user's blood flow.

[0105] For example, the processor 510 can use the PPG sensor 531 to monitor the user's blood flow. The processor 510 can utilize the PPG sensor 531 to identify changes in the user's blood flow. For example, the processor 510 can use the PPG sensor 531 to identify the user's perfusion index (PI). The term "perfusion index" refers to the ratio of pulsatile blood flow to non-pulsatile static blood flow in peripheral tissues such as fingertips, toes, and ears. Based on the user's perfusion index, the processor 510 can identify first information regarding the user's blood flow. A specific example of the processor 510 using the PPG sensor 531 to identify the user's perfusion index (PI) will be described in more detail below with reference to Figure 8 Specific examples of the processor 510 using the PPG sensor 531 to identify the user's perfusion index (PI) will be described in more detail below.

[0106] According to an embodiment, the processor 510 can use the temperature sensor 532 to obtain second information regarding the temperature of a part of the user's body. For example, the processor 510 can use the temperature sensor 532 to identify the temperature of this part of the user's body. Based on the temperature of this part of the user's body, the processor 510 can identify the user's body temperature. For example, the temperature of this part of the user's body may be different from the user's body temperature. The processor 510 can calibrate the temperature of this part of the user's body based on information regarding this part of the user's body where the temperature sensor 532 is located.

[0107] According to an embodiment, the processor 510 can store the first information regarding the user's blood flow and the second information regarding the temperature of this part of the user's body in the memory 540 in an associated manner. For example, the processor 510 can store the first information regarding the user's blood flow and the second information regarding the temperature of this part of the user's body together. The processor 510 can identify the temperature of this part of the user's body corresponding to the blood flow volume.

[0108] In operation 720, the processor 510 can change the state of the temperature sensor 532 from an active (enabled) state to an inactive (disabled) state. For example, the processor 510 can store the first information and the second information in an associated manner, and then change the state of the temperature sensor 532 from the active state to the inactive state.

[0109] In the case of using the temperature sensor 532 to monitor the temperature of a part of the user's body, the current consumption may increase. Therefore, the processor 510 can identify the temperature of the user's body corresponding to the blood flow, store the first information regarding the user's blood flow and the second information regarding the temperature of this part of the user's body in an associated manner, and then change the state of the temperature sensor 532 from the active state to the inactive state. Based on changing the state of the temperature sensor 532 from the active state to the inactive state, the processor 510 can reduce the current consumption.

[0110] In operation 730, the processor 510 may identify whether a first value representing a user's blood flow is outside a first range. For example, when the PPG sensor 531 is monitoring the user's blood flow and the temperature sensor 532 remains in an inactive state, the processor 510 may identify whether the first value representing the user's blood flow is outside the first range established based on the first information.

[0111] According to an embodiment, the processor 510 may use the PPG sensor 531 to monitor the user's blood flow. The current consumption of the PPG sensor 531 may be less than the current consumption of the temperature sensor 532. Thus, the processor 510 may use the PPG sensor 531 to monitor the user's blood flow while the temperature sensor 532 remains in an inactive state. Based on monitoring the user's blood flow using the PPG sensor 531, the processor 510 may identify a first value representing the user's blood flow. For example, the processor 510 may use the PPG sensor 531 to identify a perfusion index (PI). The processor 510 may identify the identified perfusion index as the first value.

[0112] For example, the processor 510 may set the first range based on the first information. The processor 510 may set the first range based on the first information stored in the memory 540. Each person may have a different blood flow in a steady state. Thus, the processor 510 may identify a value representing the user's blood flow in a steady state based on the first information stored in the memory 540 in association with the second information. Based on the value representing the user's blood flow in a steady state, the processor 510 may set the first range.

[0113] For example, the processor 510 may identify whether the first value representing the user's blood flow is outside the first range. In an example, the processor 510 may change the state of the temperature sensor from an inactive state to an active state based on identifying whether the first value representing the user's blood flow is outside the first range.

[0114] According to an embodiment, the processor 510 may perform operation 730 at a specified time interval based on identifying that the first value representing the user's blood flow is not outside the first range (''No'' in operation 730). The processor 510 may monitor the user's blood flow based on identifying that the first value representing the user's blood flow is not outside the first range. Based on monitoring the user's blood flow, the processor 510 may identify other values representing the user's blood flow. The processor 510 may identify whether the identified other values are outside the first range.

[0115] In operation 740, when the first value representing the user's blood flow is outside the first range (the "Yes" in operation 730), the processor 510 may change the state of the temperature sensor 532 from the inactive state to the active state. For example, the processor 510 may change the state of the temperature sensor 532 from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range.

[0116] For example, the processor 510 may identify that the first value representing the user's blood flow is within the first range. Based on identifying that the first value representing the user's blood flow is outside the first range, the processor 510 may identify that the temperature of the part of the user's body (or the user's skin temperature) may have changed. The processor 510 may change the state of the temperature sensor 532 from the inactive state to the active state to identify (or measure) the temperature of this part of the user's body.

[0117] In operation 750, the processor 510 may identify whether the second value representing the temperature of this part of the user's body is outside the second range. For example, the processor 510 may identify whether the second value representing the temperature of this part of the user's body, identified using the temperature sensor 532 that has been changed to the active state, is outside the second range established based on the second information.

[0118] According to an embodiment, the processor 510 may use the temperature sensor 532 that has been changed to the active state to identify the second value representing the temperature of this part of the user's body. Based on identifying that the first value representing the user's blood flow is outside the first range, the processor 510 may identify whether the second value representing the temperature of this part of the user's body is outside the second range. Based on identifying that the user's blood flow has changed, the processor 510 may identify whether the temperature of this part of the user's body has changed.

[0119] For example, the processor 510 may set the second range based on the second information. The processor 510 may set the second range based on the second information associated with the first information stored in the memory 540. The temperature of a part of the body (or body temperature) in a steady state may vary from person to person. Therefore, the processor 510 may identify the value of the temperature of the part of the user's body in a steady state based on the second information stored in the memory 540. The processor 510 may set the second range based on the value of the temperature of this part of the user's body in a steady state. The second range may refer to a reference range for providing a notification to the user.

[0120] According to an embodiment, the processor 510 may use the temperature sensor 532 disposed towards the part of the body to identify a second value representing the temperature of the part of the user's body. The processor 510 may calibrate the second value representing the temperature of the part of the body based on the information about the part of the body. Based on the calibrated second value, the processor 510 may obtain information about the user's body temperature. For example, the temperature of the part of the user's body may be different from the user's body temperature. To obtain information about the user's body temperature, the processor 510 may identify the information about the part of the user's body. The processor 510 may identify the information about the part of the user's body based on the shape of the electronic device 500. For example, the processor 510 may identify that the part of the user's body is the wrist based on identifying that the shape of the electronic device 500 is a watch shape. For example, the processor 510 may identify that the part of the user's body is the finger based on identifying that the electronic device 500 is a ring shape.

[0121] As the part of the user's body is further away from the torso, the difference between the temperature of the part of the user's body and the body temperature may increase. Therefore, the processor 510 may calibrate the second value representing the temperature of the part of the user's body based on the information about the part of the user's body.

[0122] In operation 760, when the second value representing the temperature of the part of the user's body is outside the second range (the "Yes" in operation 750), the processor 510 may provide a notification. For example, the processor 510 may provide a notification based on identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0123] According to an embodiment, based on identifying that the second value representing the temperature of the part of the user's body is outside the second range, the processor 510 may identify that the change amount of the user's skin temperature is equal to or greater than the reference change amount. Based on identifying that the change amount of the user's skin temperature is equal to or greater than the reference change amount, the processor 510 may provide a notification for displaying a notification of the temperature change to the user.

[0124] For example, the processor 510 may identify that the temperature of the part of the user's body drops below the second range. The processor 510 may identify that the temperature of the part of the user's body has dropped by the reference change amount or more. The processor 510 may provide a notification for displaying a warning that hypothermia may occur based on identifying that the temperature of the part of the user's body has dropped by the reference change amount or more.

[0125] For example, the processor 510 may recognize that the temperature of a part of the user's body has risen above a second range. The processor 510 may recognize that the temperature of a part of the user's body has risen by more than a reference change amount. Based on recognizing that the temperature of this part of the user's body has risen above the reference change amount, the processor 510 may provide a notification for displaying a warning that the user's body temperature may have risen.

[0126] According to an embodiment, based on recognizing that a second value representing the user's body temperature is outside a second range, the processor 510 may use a communication circuit (e.g., Figure 5 the communication circuit 520) to send a signal for controlling an external electronic device connected to the electronic device 500 to provide a notification. The external electronic device may provide a notification to the user based on the signal received from the electronic device 500. For example, the signal for controlling the external electronic device may include at least one of a first value representing the user's blood flow and a second value representing the temperature of a part of the user's body.

[0127] In operation 770, when the second value representing the temperature of a part of the user's body is not outside the second range (''No'' in operation 750), the processor 510 may provide an additional notification to the user. For example, based on recognizing that the second value representing the temperature of this part of the user's body is within the second range, the processor 510 may provide an additional notification.

[0128] According to an embodiment, based on recognizing that a first value representing the user's blood flow is outside a first range, the processor 510 may use the temperature sensor 532 to identify a second value representing the temperature of this part of the user's body. The processor 510 may recognize that the second value is within the second range. The processor 510 may recognize that the temperature of this part of the user's body has not changed, even though the user's blood flow has changed. The processor 510 may provide an additional notification to indicate that only the user's blood flow has changed.

[0129] For example, based on recognizing that the temperature of this part of the user's body has not changed but the user's blood flow has changed, the processor 510 may recognize that the user's stress is increasing. The processor 510 may provide an additional notification to indicate that the user's stress is increasing.

[0130] For example, based on recognizing that the temperature of this part of the user's body has not changed but the user's blood flow has changed, the processor 510 may recognize that the user is experiencing hypertension symptoms. The processor 510 may provide an additional notification to inform the user of suspected hypertension.

[0131] According to an embodiment, the processor 510 may not perform operation 770. Based on identifying that a second value representing the temperature of the portion of the user's body is within a second range, the processor 510 may perform operation 720. For example, the processor 510 may change the state of the temperature sensor 532 from an active state to an inactive state based on identifying that a second value representing the temperature of the portion of the user's body is within a second range. The processor 510 may change the state of the temperature sensor 532 from an active state to an inactive state based on identifying that the temperature of the portion of the user's body has not changed. By changing the state of the temperature sensor 532 from an active state to an inactive state, the processor 510 may reduce its current consumption (or power consumption).

[0132] According to an embodiment, the processor 510 may identify that a third value representing the user's blood flow, which is identified after the state of the temperature sensor 532 becomes active, enters a first range. Based on identifying that the third value enters the first range, the processor 510 may change the state of the temperature sensor 532 from an active state to an inactive state. After obtaining the second value, the processor 510 may obtain a third value representing the user's blood flow. Based on identifying that the third value falls within the first range, the processor 510 may identify that the user's blood flow has returned to a steady state of blood flow. Based on identifying that the user's blood flow has returned to a steady state of blood flow, the processor 510 may change the state of the temperature sensor 532 from an active state to an inactive state.

[0133] Figure 8 is a diagram showing an example of a change trend of a user's blood flow according to an embodiment.

[0134] Referring to Figure 8 , trends 810, 820, and / or 830 represent the change of the user's blood flow over time. A processor (e.g., Figure 5 processor 510) may monitor the user's blood flow using a PPG sensor (e.g., Figure 5 PPG sensor 531). Using the PPG sensor 531, the processor 510 may identify trends (e.g., trend 810 to trend 830) representing the change of the user's blood flow over time.

[0135] According to an embodiment, the trend indicating the change in the user's blood flow can vary according to the ambient temperature. For example, in an environment with normal ambient temperature (e.g., an environment where the user's body temperature is similar to the ambient temperature), the processor 510 can use the PPG sensor 531 to identify the trend indicating the change in the user's blood flow as the trend 810. For example, in an environment with a relatively low ambient temperature (e.g., an environment where the ambient temperature is lower than the user's body temperature), the processor 510 can use the PPG sensor 531 to identify the trend indicating the change in the user's blood flow as the trend 820. For example, in an environment with a relatively high ambient temperature (e.g., an environment where the ambient temperature is higher than the user's body temperature), the processor 510 can use the PPG sensor 531 to identify the trend indicating the change in the user's blood flow as the trend 830.

[0136] According to an embodiment, the processor 510 can identify the user's perfusion index (PI) based on the trend indicating the change in the user's blood flow (e.g., trends 810 to 830). For ease of description, the description will be given by taking the processor 510 identifying the PI based on the trend 810 as an example.

[0137] For example, the processor 510 can identify the direct current (DC) signal component 851 and the alternating current (AC) signal component 852 based on the trend 810. For example, the DC signal component 851 can include a first component 861, a second component 862, and a third component 863. The first component 861 can be generated by body parts, such as the skin tissue and bones of the user's body. The second component 862 can be generated by the user's venous blood. The third component 863 can be generated by the user's non-pulsatile arterial blood. For example, the AC signal component 852 can include a fourth component 864. The fourth component 864 can be generated by the user's pulsatile arterial blood.

[0138] For example, the processor 510 can identify the DC signal component 851 and the AC signal component 852 based on the baseline (e.g., envelope) of the trend 810. The processor 510 can identify the DC signal component 851 based on the baseline (or the average value of the baseline) identified at the lower end of the trend 810. The processor 510 can identify the AC signal component 852 based on the peak-to-peak (p-p) (or the average value of the peak-to-peak) of the trend 810.

[0139] For example, the processor 510 can identify the direct current (DC) signal component 851 based on the average value of the trend 810. The processor 510 can identify the alternating current (AC) signal component 852 based on the peak-to-peak (p-p) (or the average value of the peak-to-peak) of the trend 810.

[0140] According to an embodiment, the processor 510 can identify the PI by identifying the ratio of the AC signal component 852 to the DC signal component 851. For example, the PI can be set as shown in Equation 1.

[0141] [Formula 1]

[0142] The above Formula 1 is for illustrative purposes only, is not limited thereto, and can be modified, changed, or extended in various ways.

[0143] Referring to Formula 1, "AC" refers to the alternating current signal component 852 and "DC" refers to the direct current signal component 851. "PI" can be set as the ratio of the AC signal component 852 to the DC signal component 851. The unit of PI is % (percentage).

[0144] For example, in the case where capillaries contract due to a decrease in ambient temperature, the amount of blood flowing through the capillaries may decrease. As the blood flow decreases, the amount of light reaching the PD of the PPG sensor 531 can increase. When the amount of light reaching the PD increases, the DC signal component 851 can increase, and the AC signal component 852 can decrease. Therefore, the processor 510 can recognize a PI lower than a reference value (e.g., the PI when the ambient temperature is similar to the body temperature) at a low ambient temperature.

[0145] For example, in the case where capillaries relax due to an increase in ambient temperature, the amount of blood flowing through the capillaries can increase. As the blood flow increases, the amount of light reaching the PD of the PPG sensor 531 can decrease. When the amount of light reaching the PD decreases, the DC signal component 851 can decrease, and the AC signal component 852 can increase. Therefore, the processor 510 can recognize a PI higher than a reference value (e.g., the PI when the ambient temperature is similar to the body temperature) at a high ambient temperature.

[0146] According to an embodiment, the processor 510 can recognize the PI as a first value representing the user's blood flow. Based on whether the first value is within a first range, the processor 510 can determine whether to activate the temperature sensor (e.g., Figure 5 the temperature sensor 532 in

[0147] Figure 9 is a flowchart showing an example operation of an example electronic device according to an embodiment.

[0148] In the following embodiments, each operation can be executed sequentially, but does not have to be executed sequentially. For example, the execution order of the operations can be changed, and at least two operations can be executed in parallel.

[0149] According to an embodiment, it should be understood that operations 910 to 940 can be executed by a processor (e.g., Figure 5 the processor 510 of the electronic device 500 in Figure 5 an electronic device such as

[0150] Referring to Figure 9, in operation 910, the processor 510 may change the state of the temperature sensor (e.g., Figure 5 temperature sensor 532) from an inactive state to an active state. For example, the processor 510 may change the state of the temperature sensor 532 from an inactive state to an active state in response to identifying that a first value representing the user's blood flow is outside a first range. Operation 910 may correspond to Figure 7 operation 740.

[0151] In operation 920, the processor 510 may identify whether the first value is within a third range. For example, the processor 510 may identify whether the first value is within a third range different from the first range based on identifying that a first value representing the user's blood flow is outside the first range.

[0152] According to an embodiment, the processor 510 may set a third range and a fourth range outside the first range. For example, the processor 510 may set the first range, the third range, and the fourth range based on first information. In an example, the processor 510 may identify the user's state as a stable state based on identifying that a value representing the user's blood flow is within the first range. Based on identifying that a value representing the user's blood flow is within the third range, the processor 510 may identify the user's state as an alert state. Based on identifying that a value representing the user's blood flow is within the fourth range, the processor 510 may identify the user's state as an emergency state.

[0153] In operation 930, in the case where the first value is within a third range different from the first range ( "Yes" in operation 920), the processor 510 may set a period (hereinafter referred to as an operation period) for changing the state of the temperature sensor 532 from an inactive state to an active state to a first period. After the temperature sensor 532 operates in an inactive state for a specific period according to the operation period, it may then operate in an active state. Thereafter, after the temperature sensor 532 operates in an inactive state again in the next period, it may then operate in an active state. That is, the state of the temperature sensor 532 may be periodically changed from an inactive state to an active state.

[0154] For example, activating the temperature sensor 532 may refer to the temperature sensor 532 changing from a sleep state to a wake state. For example, deactivating the temperature sensor 532 may refer to the temperature sensor 532 changing from a wake state to a sleep state.

[0155] For example, when the temperature sensor 532 is activated, it may refer to, for example, the temperature sensor 532 sensing temperature. When the temperature sensor 532 is deactivated, it may refer to, for example, the temperature sensor 532 not sensing any temperature. For example, the period for changing the state of the temperature sensor 532 from an inactive state to an active state may represent, for example, a sensing period.

[0156] Based on identifying that the first value is within a third range different from the first range, the processor 510 may set the period for changing the state of the temperature sensor 532 from the inactive state to the active state to a first period.

[0157] In operation 940, when the first value is outside a third range different from the first range (the "No" in operation 902), the processor 510 may set the period for changing the state of the temperature sensor 532 from the inactive state to the active state to a second period. In the case where the first value is outside the third range different from the first range, the processor 510 may, based on identifying that the first value is outside the third range different from the first range, set the period for changing the state of the temperature sensor 532 from the inactive state to the active state to a second period. For example, the processor 510 may identify that the first value is within a fourth range based on the first value being outside the first range and then outside the third range. Based on identifying that the first value is within a fourth range different from the first range and the third range, the processor 510 may set the period for changing the state of the temperature sensor 532 from the inactive state to the active state to a second period shorter than the first period.

[0158] According to an embodiment, the processor 510 may identify the user's state based on a first value representing the user's blood flow. Based on the user state, the processor 510 may set the period for activating the temperature sensor 532. For example, the processor 510 may activate the temperature sensor 532 at a specified time interval based on the first value representing the user's blood flow being outside the first range. The processor 510 may activate the temperature sensor 532 according to the first period based on the user state identified according to the first value being an alarm state. Based on identifying that the user state identified according to the first value is an emergency, the processor 510 may activate the temperature sensor 532 according to a second period shorter than the first period. Based on identifying that the user's blood flow is changing rapidly, the processor 510 may set the period for activating the temperature sensor 532 to be shorter.

[0159] Figure 10 is a diagram showing an example operation of an example electronic device according to an embodiment.

[0160] Figure 11 is a flowchart showing an example operation of an example electronic device according to an embodiment.

[0161] Referring to Figure 10 , the electronic device 1010 may include Figure 5At least some of the components of the electronic device 500. For example, the electronic device 1010 may include a processor (e.g., including processing circuitry) 510, a communication circuit 520, a memory 540, and a temperature sensor 532. The electronic device 1010 may include either the PPG sensor 531 or the temperature sensor 532, that is, it may include only the temperature sensor 532.

[0162] According to an embodiment, the electronic device 1010 may be coupled to an external electronic device 1020. For example, the external electronic device 1020 may include a PPG sensor 531. The external electronic device 1020 may use the PPG sensor 531 to monitor the user's blood flow. The processor 510 of the electronic device 1010 may obtain information about the user's blood flow from the external electronic device 1020. The processor 510 of the electronic device 1010 may receive information about the user's blood flow from the external electronic device 1020 via the communication circuit 520.

[0163] According to an embodiment, the electronic device 1010 may be worn on a first part (e.g., the wrist) of the user's body. The external electronic device 1020 may be worn on a second part (e.g., the finger) of the user's body. The electronic device 1010 may identify the temperature at the first part of the user's body. The external electronic device 1020 may identify the blood flow in the second part of the user's body. The processor 510 of the electronic device 1010 may determine whether to activate the temperature sensor 532 based on a first value representing the user's blood flow obtained by the external electronic device 1020. To determine whether to activate the temperature sensor 532 based on the first value representing the user's blood flow obtained by the external electronic device 1020, the processor 510 of the electronic device 1010 may perform Figure 11 operations 1110 to 1180.

[0164] In the following embodiments, each action may be performed sequentially, but not necessarily sequentially. For example, the execution order of each action may be changed, and at least two operations may be performed in parallel.

[0165] Referring to Figure 11 In operation 1110, the processor 510 of the electronic device 1010 may obtain first information about the user's blood flow from the external electronic device 1020. For example, the processor 510 may obtain first information about the user's blood flow from the external electronic device 1020 connected to the electronic device 1010. The external electronic device 1020 may monitor the user's blood flow. The external electronic device 1020 may send the first information about the user's blood flow to the electronic device 1010 based on a specified time interval. The processor 510 may receive the first information about the user's blood flow from the external electronic device 1020.

[0166] In operation 1120, the processor 510 may store the first information regarding the user's blood flow in association with the second information regarding the temperature of a part of the user's body. For example, the processor 510 may store the first information regarding the user's blood flow in association with the second information regarding the temperature of the part of the user's body identified using the temperature sensor 532 in the memory 540.

[0167] For example, the processor 510 may set the state of the temperature sensor 532 to the active state based on obtaining the first information regarding the user's blood flow from the external electronic device 1020. Using the activated temperature sensor 532, the processor 510 may obtain the second information regarding the temperature of the part of the user's body. The processor 510 may store the first information and the second information in association with each other in the memory 540. For example, operation 1120 may correspond to Figure 7 operation 710 of

[0168] In operation 1130, the processor 510 may change the state of the temperature sensor from the active state to the inactive state. For example, operation 1130 may correspond to Figure 7 operation 720 of

[0169] In operation 1140, the processor 510 may identify whether a first value representing the user's blood flow is outside a first range. For example, operation 1140 may correspond to Figure 7 operation 730 of . In the case where the first value representing the user's blood flow is outside the first range (Yes in operation 1140), the processor 510 may perform operation 1150. In the case where the first value representing the user's blood flow is within the first range (No in operation 1140), the processor 510 may perform operation 1140 again.

[0170] In operation 1150, when the first value representing the user's blood flow is outside the first range (Yes in operation 1140), the processor 510 may change the state of the temperature sensor 532 from the inactive state to the active state. For example, in response to identifying that the first value representing the user's blood flow is outside the first range, the processor 510 may change the state of the temperature sensor 532 from the inactive state to the active state. For example, operation 1150 may correspond to Figure 7 operation 740 of

[0171] In operation 1160, the processor 510 may identify whether a second value representing the temperature of the part of the user's body is outside a second range. For example, operation 1160 may correspond to Figure 7 operation 750 of

[0172] In operation 1170, when the second value representing the temperature of a part of the user's body is outside the second range (the "yes" in operation 1160), the processor 510 may provide a notification. For example, the processor 510 may provide a notification based on identifying that the second value representing the temperature of a part of the user's body is outside the second range. For example, operation 1170 may correspond to Figure 7 operation 760.

[0173] According to an embodiment, the processor 510 may provide a notification through at least one of the electronic device 1010 and the external electronic device 1020. For example, the processor 510 may provide a notification to the user only through the electronic device 1010 among the electronic device 1010 and the external electronic device 1020. For example, the processor 510 may provide a notification to the user through both the electronic device 1010 and the external electronic device 1020.

[0174] In operation 1180, when the second value representing the temperature of a part of the user's body is not outside the second range (the "no" in operation 1160), the processor 510 may provide an additional notification. For example, based on the processor 510 identifying that the second value representing the temperature of this part of the user's body is within the second range, the processor 510 may provide an additional notification. Operation 1180 may correspond to Figure 7 operation 770.

[0175] According to an embodiment, the processor 510 may provide an additional notification through at least one of the electronic device 1010 and the external electronic device 1020. For example, the processor 510 may provide an additional notification to the user only through the external electronic device 1020. In addition, for example, the processor 510 may provide an additional notification to the user through both the electronic device 1010 and the external electronic device 1020. Although Figure 11 illustrates the operation of providing an additional notification when the second value is not outside the second range, embodiments of the present disclosure are not limited thereto. According to an embodiment, when the second value is not outside the second range, the processor 510 may immediately execute operation 1110 again without executing operation 1180.

[0176] According to an embodiment, the processor 510 may execute operation 1110 after providing an additional notification. For example, after providing an additional notification, the processor 510 may obtain first information about the user's blood flow from the external electronic device 1020. The processor 510 may obtain first information about the user's blood flow from the external electronic device 1020 at a specified time interval and may execute operations 1120 to 1180.

[0177] According to an embodiment, an electronic device may include a photoplethysmogram (PPG) sensor, a temperature sensor, a memory, and a processor operatively coupled to the PPG sensor, the temperature sensor, and the memory. The processor may be configured to store, in the memory, first information regarding a user's blood flow obtained using the PPG sensor and second information regarding the temperature of a part of the user's body obtained using the temperature sensor in an associated manner. The processor may be configured to change a state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The processor may be configured to identify that a first value representing the user's blood flow is outside a first range set based on the first information, based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state. The processor may be configured to change the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The processor may be configured to identify that a second value representing the temperature of the part of the user's body identified using the temperature sensor that has been changed to the active state is outside a second range set based on the second information. The processor may be configured to provide a notification based on identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0178] According to an embodiment, the processor is configured to identify a trend related to a user's blood flow monitored using the PPG sensor. The processor may be configured to identify a value related to a ratio between a direct current (DC) signal component and an alternating current (AC) signal component of the user's blood flow trend as the first value representing the user's blood flow.

[0179] According to an embodiment, the electronic device may further include a communication circuit. The processor may further be configured to use the communication circuit to send a signal for controlling an external electronic device connected to the electronic device to provide a notification to an external electronic device based on identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0180] According to an embodiment, the signal for controlling the external electronic device may include at least one of the first value representing the user's blood flow or the second value representing the temperature of the part of the user's body.

[0181] According to an embodiment, the processor may further be configured to identify that a third value representing the user's blood flow identified based on the state of the temperature sensor being changed to the active state enters the first range. The processor may further be configured to change the state of the temperature sensor from the active state to the inactive state based on identifying that the third value representing the user's blood flow enters the first range.

[0182] According to an embodiment, the processor may also be configured to change the state of the temperature sensor from an inactive state to an active state in response to identifying that a first value representing the user's blood flow is outside a first range. The processor may also be configured to change the state of the temperature sensor from the active state to the inactive state based on identifying that a second value representing the temperature of the part of the user's body obtained using the temperature sensor changed to the active state is within a second range.

[0183] According to an embodiment, the processor may also be configured to provide an additional notification indicating that the first value representing the user's blood flow is outside the first range based on identifying that a second value representing the temperature of the part of the user's body identified using the temperature sensor changed to the active state is within a second range.

[0184] According to an embodiment, the processor may also be configured to use a temperature sensor disposed towards the part of the user's body to identify a second value representing the temperature of the part of the user's body. The processor may also be configured to calibrate the second value representing the temperature of the part of the user's body based on information about the part of the user's body. The processor may also be configured to obtain information about the user's body temperature based on calibrating the second value.

[0185] According to an embodiment, the processor may also be configured to set a period for changing the state of the temperature sensor from the inactive state to the active state to a first period based on identifying that the first value is within a third range different from the first range. The processor may also be configured to set a period for changing the state of the temperature sensor from the inactive state to the active state to a second period based on identifying that the first value is within a fourth range different from the first range and the third range.

[0186] According to an embodiment, the electronic device may further include an annular housing and a layer. The annular housing includes an outer surface and an inner surface. The layer includes at least one printed circuit board and is disposed between the outer surface and the inner surface. The PPG sensor, the temperature sensor, the memory, and the processor may be disposed in the layer. The PPG sensor may be disposed towards a first part of the user's body. The temperature sensor may be disposed towards a second part of the user's body.

[0187] According to an embodiment, an electronic device may include a temperature sensor, a communication circuit, a memory, and a processor operatively coupled to the temperature sensor, the communication circuit, and the memory. The processor may be configured to obtain first information about a user's blood flow from an external electronic device connected to the electronic device. The processor may be configured to store the first information about the user's blood flow and second information about the temperature of a part of the user's body obtained using the temperature sensor in the memory in an associated manner. The processor may be configured to change a state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The processor may be configured to identify that a first value representing the user's blood flow is outside a first range set based on the first information, based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state. The processor may be configured to change the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The processor may be configured to identify that a second value representing the temperature of the part of the user's body identified using the temperature sensor that has been changed to the active state is outside a second range set based on the second information. The processor may be configured to provide a notification in response to identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0188] According to an embodiment, a method of operating an electronic device may include storing, in a memory of the electronic device, first information about a user's blood flow obtained using a PPG sensor of the electronic device and second information about the temperature of a part of the user's body obtained using a temperature sensor of the electronic device in an associated manner. The method may include changing a state of the temperature sensor from an active state to an inactive state based on storing the first information and the second information in an associated manner. The method may include identifying that a first value representing the user's blood flow is outside a first range set based on the first information, based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state. The method may include changing the state of the temperature sensor from the inactive state to the active state in response to identifying that the first value representing the user's blood flow is outside the first range. The method may include identifying that a second value representing the temperature of the part of the user's body identified using the temperature sensor that has been changed to the active state is outside a second range set based on the second information. The method may include providing a notification in response to identifying that the second value representing the temperature of the part of the user's body is outside the second range.

[0189] According to an embodiment, the method may further include identifying a trend associated with the user's blood flow monitored using the PPG sensor. The method may further include identifying a value related to a ratio between a DC signal component and an AC signal component of the user's blood flow trend as the first value representing the user's blood flow.

[0190] According to an embodiment, the method may further include, based on identifying that a second value representing the temperature of the part of the user's body is outside a second range, using a communication circuit of the electronic device to send a signal to an external electronic device for controlling the external electronic device connected to the electronic device to provide a notification.

[0191] According to an embodiment, the signal for controlling the external electronic device may include at least one of a first value representing the user's blood flow or a second value representing the temperature of the part of the user's body.

[0192] According to an embodiment, the method may further include identifying that a third value representing the user's blood flow, which is identified based on the state of the temperature sensor being changed to an active state, enters a first range. The method may include, based on identifying that the third value representing the user's blood flow enters the first range, changing the state of the temperature sensor from the active state to an inactive state.

[0193] According to an embodiment, the method may further include, in response to identifying that a first value representing the user's blood flow is outside a first range, changing the state of the temperature sensor from an inactive state to an active state. The method may include, based on identifying that a second value representing the temperature of the part of the user's body obtained using the temperature sensor changed to the active state is within a second range, changing the state of the temperature sensor from the active state to an inactive state.

[0194] According to an embodiment, the method may further include, based on identifying that a second value representing the temperature of the part of the user's body identified using the temperature sensor changed to the active state is within a second range, providing an additional notification indicating that a first value representing the user's blood flow is outside the first range.

[0195] According to an embodiment, the method further includes using a temperature sensor disposed toward the part of the user's body to identify a second value representing the temperature of the part of the user's body. The method may include calibrating the second value representing the temperature of the part of the user's body based on information about the part of the user's body. The method may include obtaining information about the user's body temperature based on the calibrated second value.

[0196] According to an embodiment, the method may further include, based on identifying that the first value is within a third range different from the first range, setting a period for changing the state of the temperature sensor from an inactive state to an active state to a first period. The method may include, based on identifying that the first value is within a fourth range different from the first range and the third range, setting a period for changing the state of the temperature sensor from an inactive state to an active state to a second period.

[0197] An electronic device according to various embodiments disclosed herein may be one of various types of electronic devices. The electronic device may include, for example, a portable communication device (e.g., a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, a home appliance, etc. According to an example, the electronic device is not limited to the above-mentioned electronic devices.

[0198] It should be understood that the various embodiments of the present disclosure and the terms used therein are not intended to limit the technical features described herein to a specific embodiment, but include various changes, equivalent forms, or alternative forms for the corresponding embodiment. For the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It will be understood that a singular form of a noun corresponding to a term may include one or more things, unless the relevant context clearly indicates otherwise. As used herein, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one or all possible combinations of the items listed together in the corresponding one of the phrases. As used herein, terms such as "first" and "second" or "1st" and "2nd" may be used to simply distinguish a corresponding component from another component, and do not limit the component in other respects (e.g., importance or order). It will be understood that, with or without the terms "operatively" or "communicatively", if an element (e.g., a first element) is referred to as "coupled to", "coupled with", "connected to", or "connected with" another element (e.g., a second element), the element may be directly (e.g., wired) coupled to the other element, wirelessly coupled to the other element, or coupled to the other element via a third element.

[0199] As used in connection with the various embodiments of the present disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, or any combination thereof, and may be used interchangeably with other terms (e.g., "logic", "logic block", "part", or "circuit"). A module may be a single integrated component adapted to perform one or more functions or the smallest unit or part of the single integrated component. For example, according to an example, a module may be implemented in the form of an application specific integrated circuit (ASIC).

[0200] The various embodiments described herein can be implemented as software (e.g., program 140) including one or more instructions readable by a machine (e.g., electronic device 101) stored in a storage medium (e.g., internal memory 136 or external memory 138). For example, under the control of a processor of a machine (e.g., processor 120 of electronic device 101), the processor can call at least one of the one or more instructions stored in the storage medium with or without using one or more other components and execute it. This enables the machine to operate to perform at least one function according to the at least one instruction called. The one or more instructions can include code generated by a compiler or code that can be run by an interpreter. The machine-readable storage medium can be provided in the form of a non-transitory storage medium. Herein, a "non-transitory" storage medium is a tangible device and may not include signals (e.g., electromagnetic waves), but this term does not distinguish between cases where data is stored semi-permanently in the storage medium and cases where data is stored temporarily in the storage medium.

[0201] According to an example, a method according to various embodiments of the present disclosure can be included and provided in a computer program product. The computer program product can be traded between a seller and a purchaser as a product. The computer program product can be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or can be distributed online (e.g., downloaded or uploaded) via an application store (e.g., PlayStore™), or can be directly distributed (e.g., downloaded or uploaded) between two user devices (e.g., smart phones). If it is distributed online, at least a part of the computer program product can be generated temporarily, or at least a part of the computer program product can be stored at least temporarily in a machine-readable storage medium (such as the memory of a manufacturer's server, an application store's server, or a relay server).

[0202] According to various embodiments of the present disclosure, each of the above components (e.g., modules or programs) may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to various embodiments of the present disclosure, one or more of the above components may be omitted, or one or more other components may be added. As another alternative or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In this case, according to various embodiments of the present disclosure, the integrated component may still perform one or more functions of each of the multiple components in the same or similar manner as performed by the corresponding one of the multiple components before integration. According to various embodiments of the present disclosure, operations performed by a module, a program, or another component may be executed sequentially, in parallel, repeatedly, or heuristically, or one or more operations may be executed in a different order or omitted, or one or more other operations may be added.

[0203] Although the present disclosure has been illustrated and described with reference to various exemplary embodiments, it should be understood that the various exemplary embodiments are intended to be illustrative and not restrictive. Those skilled in the art will further understand that various changes can be made in form and detail without departing from the true spirit and full scope of the present disclosure, including the appended claims and their equivalents. It will also be understood that any embodiment described herein can be used in combination with any other embodiment described herein.

Claims

1. An electronic device, the electronic device comprising: A PPG sensor, where PPG refers to photoplethysmogram; A temperature sensor; A memory; And A processor, the processor being operably coupled to the PPG sensor, the temperature sensor, and the memory, wherein the processor is configured to: Associatively store in the memory first information regarding a user's blood flow obtained using the PPG sensor and second information regarding the temperature of a part of the user's body obtained using the temperature sensor; Change the state of the temperature sensor from an active state to an inactive state based on the associative storage of the first information and the second information; Based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state, identify that a first value representing the user's blood flow is outside a first range set based on the first information; In response to identifying that the first value representing the user's blood flow is outside the first range, change the state of the temperature sensor from the inactive state to the active state; Identify that a second value representing the temperature of this part of the user's body identified using the temperature sensor changed to the active state is outside a second range set based on the second information, and In response to identifying that the second value representing the temperature of this part of the user's body is outside the second range, provide a notification.

2. The electronic device according to claim 1, wherein, The processor is configured to: Identify a trend related to the user's blood flow monitored using the PPG sensor, and Identify a value related to the ratio between a DC signal component and an AC signal component of the trend of the user's blood flow as the first value representing the user's blood flow.

3. The electronic device according to claim 1, the electronic device further comprising: A communication circuit Wherein the processor is further configured to: Based on identifying that the second value representing the temperature of this part of the user's body is outside the second range, use the communication circuit to send a signal for controlling an external electronic device connected to the electronic device to provide a notification to the external electronic device.

4. The electronic device according to claim 3, wherein, The signal for controlling the external electronic device includes at least one of the first value representing the user's blood flow or the second value representing the temperature of this part of the user's body.

5. The electronic device according to claim 1, wherein, The processor is further configured to: Identify that a third value representing the user's blood flow identified based on the state of the temperature sensor being changed to the active state enters the first range, and Based on identifying that the third value representing the user's blood flow enters the first range, change the state of the temperature sensor from the active state to the inactive state.

6. The electronic device according to claim 1, wherein, The processor is further configured to: In response to identifying that the first value representing the user's blood flow is outside the first range, change the state of the temperature sensor from the inactive state to the active state, and Based on identifying that the second value representing the temperature of this part of the user's body obtained using the temperature sensor changed to the active state is within the second range, change the state of the temperature sensor from the active state to the inactive state.

7. The electronic device according to claim 6, wherein, The processor is further configured to provide an additional notification indicating that the first value representative of the user's blood flow is outside the first range, based on recognizing that the second value representative of the temperature of the part of the user's body identified by the temperature sensor that has changed to the active state is within the second range.

8. The electronic device according to claim 1, wherein, The processor is further configured to: use the temperature sensor disposed towards the part of the user's body to identify the second value representative of the temperature of the part of the user's body, calibrate the second value representative of the temperature of the part of the user's body based on information about the part of the user's body, and obtain information about the user's body temperature based on calibrating the second value.

9. The electronic device according to claim 1, wherein, The processor is further configured to: set the period for changing the state of the temperature sensor from the inactive state to the active state to a first period based on recognizing that the first value is within a third range different from the first range, and set the period for changing the state of the temperature sensor from the inactive state to the active state to a second period based on recognizing that the first value is within a fourth range different from the first range and the third range.

10. The electronic device according to claim 1, the electronic device further comprising: A ring-shaped housing, the ring-shaped housing including an outer surface and an inner surface, and a layer, the layer including at least one printed circuit board, the layer being disposed between the outer surface and the inner surface, wherein the PPG sensor, the temperature sensor, the memory, and the processor are disposed in the layer, wherein the PPG sensor is disposed towards a first part of the user's body, and wherein the temperature sensor is disposed towards a second part of the user's body.

11. A method of operating an electronic device, the method comprising: Correlatively store in the memory of the electronic device the first information about the user's blood flow obtained using the PPG sensor of the electronic device and the second information about the temperature of the part of the user's body obtained using the temperature sensor of the electronic device, where PPG is photoplethysmogram, change the state of the temperature sensor from the active state to the inactive state based on the correlative storage of the first information and the second information, recognize that a first value representative of the user's blood flow is outside a first range set based on the first information, based on the PPG sensor monitoring the user's blood flow and the state of the temperature sensor remaining in the inactive state, change the state of the temperature sensor from the inactive state to the active state in response to recognizing that the first value representative of the user's blood flow is outside the first range, recognize that a second value representative of the temperature of the part of the user's body identified by the temperature sensor that has changed to the active state is outside a second range set based on the second information, and provide a notification in response to recognizing that the second value representative of the temperature of the part of the user's body is outside the second range.

12. The method according to claim 11, further comprising: Recognize a trend related to the user's blood flow monitored using the PPG sensor, and Identify a value related to a ratio between a direct current (DC) signal component and an alternating current (AC) signal component of the trend of the user's blood flow as a first value representing the user's blood flow.

13. The method according to claim 11, further comprising: Based on identifying that the second value representing the temperature of the part of the user's body is outside the second range, use a communication circuit of the electronic device to send a signal for controlling an external electronic device connected to the electronic device to provide a notification to the external electronic device.

14. The method according to claim 13, wherein, The signal for controlling the external electronic device includes at least one of the first value representing the user's blood flow or the second value representing the temperature of the part of the user's body.

15. The method according to claim 11, further comprising: Identify that a third value representing the user's blood flow, which is identified based on the state of the temperature sensor (532) being changed to the active state, enters the first range, and Based on identifying that the third value representing the user's blood flow enters the first range, change the state of the temperature sensor (532) from the active state to the inactive state.

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