Wearable device, method, and non-transitory computer-readable storage medium for acquiring biometric information

Abstract

According to one embodiment, a method performed by a wearable device may comprise the operations of: acquiring a first absorbance on the basis of a first reflected light for a light of a first wavelength while a pressure of a first intensity is applied to the wearable device through a part of a user's body; acquiring a second absorbance on the basis of a second reflected light for the light of the first wavelength while a pressure of a second intensity is applied to the wearable device through the part of the user's body; and determining a reference absorbance on the basis of the first absorbance and the second absorbance.

Description

Wearable device, method, and non-transitory computer-readable storage medium for obtaining biometric information

[0001] The following descriptions relate to a wearable device, a method, and a non-transitory computer-readable storage medium for obtaining biometric information.

[0002] A variety of services are provided through wearable devices. Wearable devices can be worn on a part of the user's body and operate. While worn, wearable devices can identify the user's biometric information and provide services based on this information. Electronic devices connected to wearable devices can control the wearable devices.

[0003] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above-described matters constitute prior art related to the present disclosure.

[0004] According to one embodiment, a wearable device may include a first light-emitting circuit configured to emit light of a first wavelength, at least one second light-emitting circuit configured to emit light of at least one second wavelength, at least one light-receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength, a memory storing instructions and including one or more storage media, and at least one processor including a processing circuit. The instructions, when individually and / or collectively executed by the at least one processor, obtain a first absorbance based on a first reflection light for the light of the first wavelength emitted toward the body part of the user while a pressure of a first intensity is applied to the body part of the user via the wearable device, obtain a second absorbance based on a second reflection light for the light of the first wavelength emitted toward the body part of the user while a pressure of a second intensity, distinct from the first intensity, is applied to the body part of the user via the wearable device, determine a reference absorbance based on the first absorbance and the second absorbance, and identify a start of measurement of biometric information of the user after the reference absorbance is determined, and determine, based on the start of the measurement, that the identified absorbance based on a third reflection light for the light of the first wavelength emitted toward the body part of the user is less than the reference absorbance. The wearable device can be caused to measure the biometric information based on a fourth reflected light for the at least one second wavelength of light emitted toward a part of the body of the user while the identified absorbance based on the third reflected light remains below the reference absorbance.

[0005] According to one embodiment, a method performed in a wearable device comprises: obtaining a first absorbance based on a first reflection light for light of a first wavelength emitted toward a body part of a user while a pressure of a first intensity is applied to the body part of a user via the wearable device; obtaining a second absorbance based on a second reflection light for light of the first wavelength emitted toward the body part of a user while a pressure of a second intensity, which is distinct from the first intensity, is applied to the body part of the user via the wearable device; determining a reference absorbance based on the first absorbance and the second absorbance; identifying a start of measurement of biometric information of the user after the reference absorbance is determined; identifying, based on the start of the measurement, that the identified absorbance is less than the reference absorbance based on a third reflection light for light of the first wavelength emitted toward the body part of the user; and The method may include measuring the biometric information based on a fourth reflected light for at least one second wavelength of light emitted toward a part of the body of the user while the absorbance identified based on the third reflected light remains below the reference absorbance.

[0006] According to one embodiment, a non-transitory computer-readable storage medium can store one or more programs. The one or more programs, when executed by at least one processor of a wearable device having a first light-emitting circuit configured to emit light of a first wavelength, at least one second light-emitting circuit configured to emit light of at least one second wavelength, and at least one light-receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength, obtain a first absorbance based on a first reflection light for light of the first wavelength emitted toward the body part of the user while a pressure of a first intensity is applied to the body part of the user via the wearable device, obtain a second absorbance based on a second reflection light for light of the first wavelength emitted toward the body part of the user while a pressure of a second intensity different from the first intensity is applied to the body part of the user via the wearable device, determine a reference absorbance based on the first absorbance and the second absorbance, and after the reference absorbance is determined, The wearable device may include instructions for causing the wearable device to identify the start of measurement of the biometric information of the user, and, based on the start of the measurement, identify that an absorbance identified based on a third reflected light for light of the first wavelength emitted toward the body part of the user is less than the reference absorbance, and measure the biometric information based on a fourth reflected light for light of the at least one second wavelength emitted toward the body part of the user while the absorbance identified based on the third reflected light remains less than the reference absorbance.

[0007] In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

[0008] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment.

[0009] FIGS. 2A and 2B illustrate perspective views of an electronic device according to one embodiment.

[0010] FIG. 3 illustrates an exploded perspective view of an exemplary electronic device according to one embodiment.

[0011] FIG. 4 illustrates an example of a wearable device for measuring a user's biometric information according to various embodiments.

[0012] FIG. 5a illustrates an example of a simplified block diagram of an electronic device and a wearable device.

[0013] FIG. 5b illustrates an example of a biosensor according to various embodiments.

[0014] FIG. 5c illustrates examples of light-emitting circuits and light-receiving circuits arranged in a wearable device according to various embodiments.

[0015] FIG. 6A illustrates a flowchart of the operation of a wearable device according to various embodiments.

[0016] FIG. 6b illustrates a flowchart of the operation of a wearable device according to various embodiments.

[0017] FIG. 7a illustrates an example of a graph showing absorbance as a function of wavelength, according to various embodiments.

[0018] FIG. 7b illustrates an example of a graph showing absorbance as a function of pressure, according to various embodiments.

[0019] FIG. 7c illustrates an example of a graph showing absorbance according to a user, according to various embodiments.

[0020] FIG. 8 illustrates an example of the operation of an electronic device and a wearable device for determining a reference absorbance according to various embodiments.

[0021] FIG. 9 illustrates an example of the operation of an electronic device and a wearable device for obtaining a user's biometric information according to various embodiments.

[0022] FIG. 10 illustrates an example of operation of a wearable device for identifying capillary refill time according to various embodiments.

[0023] FIG. 11 illustrates a flowchart of the operation of a wearable device according to various embodiments.

[0024] FIG. 12 illustrates an exploded perspective view of an exemplary wearable device according to various embodiments.

[0025] FIG. 13A illustrates an example of a structure of a wearable device according to various embodiments;

[0026] FIG. 13b illustrates an example of operation of a wearable device for obtaining user biometric information according to various embodiments.

[0027] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In connection with the description of the drawings, the same or similar reference numerals may be used for identical or similar components. Furthermore, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0028] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment.

[0029] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio 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 identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0030] The processor (120) may control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) by executing, for example, software (e.g., a program (140)), and may perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculation, the processor (120) may store a command or data received from another component (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the command or data stored in the volatile memory (132), and store the resulting data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0031] The auxiliary processor (123) may control at least a part of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of 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), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0032] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0033] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0034] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0035] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0036] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0037] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0038] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0039] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0040] 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 one embodiment, 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).

[0041] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0042] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0043] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0044] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0045] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, 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 module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0046] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can 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 one embodiment, the wireless communication module (192) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0047] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, 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 method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). 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, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0048] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0049] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0050] According to one embodiment, 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 external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service by itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0051] FIGS. 2A and 2B illustrate perspective views of an electronic device according to one embodiment.

[0052] Referring to FIGS. 2A and 2B , an electronic device (200) according to one embodiment (e.g., the electronic device (101) of FIG. 1 ) may include a housing (210) including a first side (or front side) (210A), a second side (or back side) (210B), and a side surface (210C) surrounding a space between the first side (210A) and the second side (210B), and a fastening member (250, 260) connected to at least a portion of the housing (210) and configured to releasably fasten the electronic device (200) to a body part (e.g., a wrist or an ankle) of a user. In another embodiment (not shown), the housing may also refer to a structure forming a portion of the first side (210A), the second side (210B), and the side surface (210C) of FIGS. 2A and 2B . In one embodiment, the first side (210A) may be formed by a front plate (201) that is at least partially substantially transparent (e.g., a glass plate or a polymer plate comprising various coating layers). The second side (210B) may be formed by a substantially opaque back plate (207). The back plate (207) may be formed of, for example, coated or colored glass, ceramic, polymer, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the foregoing materials. The side surface (210C) may be formed by a side bezel structure (or “side member”) (206) that is coupled to the front plate (201) and the back plate (207) and comprises a metal and / or a polymer. In some embodiments, the back plate (207) and the side bezel structure (206) may be formed integrally and comprise the same material (e.g., a metal material such as aluminum). The above-mentioned fastening member (250, 260) may be formed of various materials and shapes. The integral and multiple unit links may be formed to be mutually movable by a combination of at least two of the above-mentioned materials, such as woven fabric, leather, rubber, urethane, metal, ceramic, or a combination of the above-mentioned materials.

[0053] According to one embodiment, the electronic device (200) may include at least one of a display (220, see FIG. 3), an audio module (205, 208), a sensor module (211), a key input device (202, 203, 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 device (202, 203, 204), the connector hole (209), or the sensor module (211)) or may additionally include other components.

[0054] The display (220) may be visually exposed, for example, through a significant portion of the front plate (201). The shape of the display (220) may correspond to the shape of the front plate (201), and may have various shapes such as a circle, an oval, or a polygon. The display (220) may be combined with or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and / or a fingerprint sensor.

[0055] The audio module (205, 208) may include a microphone hole (205) and a speaker hole (208). The microphone hole (205) may have a microphone positioned therein for acquiring external sounds, and in some embodiments, multiple microphones may be positioned therein to detect the direction of sounds. 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 a single hole, or a speaker may be included without the speaker hole (208) (e.g., a piezo speaker).

[0056] The sensor module (211) can generate an electric signal or data value corresponding to an internal operating state of the electronic device (200) or an external environmental state. The sensor module (211) can 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) can further include at least one of a sensor module not shown, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0057] The sensor module (211) may include electrode areas (213, 214) forming a portion of the surface of the electronic device (200) and a biosignal detection circuit (not shown) electrically connected to the electrode areas (213, 214). For example, the electrode areas (213, 214) may include a first electrode area (213) and a second electrode area (214) arranged on a second surface (210B) of the housing (210). The sensor module (211) may be configured such that the electrode areas (213, 214) obtain an electrical signal from a portion of the user's body, and the biosignal detection circuit detects the user's bioinformation based on the electrical signal.

[0058] The key input devices (202, 203, 204) may include a wheel key (202) disposed on a first side (210A) of the housing (210) and rotatable in at least one direction, and / or a side key button (203, 204) disposed on a side surface (210C) of the housing (210). The wheel key may have a shape corresponding to the shape of the front plate (201). In other embodiments, the electronic device (200) may not include some or all of the above-mentioned key input devices (202, 203, 204), and the key input devices (202, 203, 204) that are not included may be implemented in another form, such as a soft key, on the display (220). The connector hole (209) may include another connector hole (not shown) that may accommodate a connector (e.g., a USB connector) for transmitting and receiving power and / or data with an external electronic device, and may accommodate a connector for transmitting and receiving audio signals with the external electronic device. The electronic device (200) may further include, for example, a connector cover (not shown) that covers at least a portion of the connector hole (209) and blocks the inflow of external foreign substances into the connector hole.

[0059] The fastening member (250, 260) can be detachably fastened to at least a portion of the housing (210) using a locking member (251, 261). The fastening member (250, 260) can include one or more of a fixing member (252), a fixing member fastening hole (253), a band guide member (254), and a band fastening ring (255).

[0060] The fixing member (252) may be configured to fix the housing (210) and the fastening members (250, 260) to a part of the user's body (e.g., a wrist or an ankle). The fastening member fastening hole (253) may correspond to the fastening member (252) to fasten the housing (210) and the fastening members (250, 260) to a part of the user's body. The band guide member (254) may be configured to limit the range of movement of the fastening member (252) when the fastening member (252) is fastened to the fastening member fastening hole (253), thereby allowing the fastening members (250, 260) to be fastened in close contact with a part of the user's body. The band fixing ring (255) may limit the range of movement of the fastening members (250, 260) when the fastening member (252) and the fastening member fastening hole (253) are fastened.

[0061] FIG. 3 illustrates an exploded perspective view of an exemplary electronic device according to one embodiment.

[0062] Referring to FIG. 3, an electronic device (300) (e.g., the electronic device (101) of FIG. 1 or the electronic device (200) of FIGS. 2A to 2B) may include a side bezel structure (310), a wheel key (320) (e.g., the wheel key (202) of FIG. 2A), a front plate (201), a display (220), a first antenna (350), a second antenna (355), a support member (360) (e.g., a bracket), a battery (370), a printed circuit board (380), a sealing member (390), a rear plate (393) (e.g., the rear plate (207) of FIG. 2B), and fastening members (395, 397) (e.g., the fastening members (250, 260) of FIG. 2B). At least one of the components of the electronic device (300) may be identical or similar to at least one of the components of the electronic device (200) of FIG. 1 or FIGS. 2A to 2B, and any overlapping descriptions will be omitted below. The support member (360) may be disposed inside the electronic device (300) and connected to the side bezel structure (310), or may be formed integrally with the side bezel structure (310). The support member (360) may be formed of, for example, a metal material and / or a non-metallic (e.g., a polymer) material. The support member (360) may have a display (220) coupled to one surface and a printed circuit board (380) 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 GPU (graphics processing unit), an application processor, a sensor processor, or a communication processor.

[0063] 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. The interface may electrically or physically connect the electronic device (300) to an external electronic device, for example, and may include a USB connector, an SD card / MMC connector, or an audio connector.

[0064] 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 portion of the battery (370) may be disposed substantially on the same plane as, for example, the printed circuit board (380). The battery (370) may be disposed integrally within the electronic device (200), or may be disposed detachably from the electronic device (200).

[0065] The first antenna (350) may be positioned 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. The first antenna (350) may, for example, perform short-range communication with an external device, wirelessly transmit and receive power required for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In another embodiment, the antenna structure may be formed by a portion or a combination of the side bezel structure (310) and / or the support member (360).

[0066] The second antenna (355) may be positioned between the printed circuit board (380) and the back plate (393). The second antenna (355) may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and / or a magnetic secure transmission (MST) antenna. The second antenna (355) may, for example, perform short-range communication with an external device, wirelessly transmit and receive power required for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In another embodiment, the antenna structure may be formed by a portion or a combination of the side bezel structure (310) and / or the back plate (393).

[0067] A sealing member (390) may be positioned between the side bezel structure (310) and the rear plate (393). The sealing member (390) may be configured to block moisture and foreign substances from entering the space surrounded by the side bezel structure (310) and the rear plate (393) from the outside.

[0068] According to one embodiment, a wearable device (e.g., electronic device (200) of FIGS. 2A and 2B and electronic device (300) of FIG. 3) can measure (or obtain, identify) biometric information of a user. For example, the wearable device can measure (or obtain) biometric information of a user using at least one light-emitting circuit and at least one light-receiving circuit.

[0069] For example, if blood is present in the capillaries of a part of the user's body, the user's biometric information (e.g., antioxidant level) may not be accurately measured. Therefore, a wearable device can measure the user's biometric information while pressure is applied to the wearable device through a part of the user's body. When pressure is applied to a part of the user's body, blood drains from the capillaries of the part of the user's body, and the user's biometric information (e.g., antioxidant level) can be measured more accurately. The wearable device can measure the user's biometric information when an absorbance lower than a reference absorbance is identified. However, since the absorbance of a part of the user's body (or skin) may vary from user to user, the reference absorbance may be set differently. Therefore, in the following disclosure, technical features for setting a reference absorbance for each user will be described.

[0070] Additionally, the wearable device can guide a user to apply pressure to a part of the user's body via the wearable device (or an electronic device connected to the wearable device). For example, the wearable device (or an electronic device connected to the wearable device) can guide the application of pressure to the wearable device. The pressure applied to the wearable device can be applied to a part of the user's body via the wearable device. In the following disclosure, technical features for guiding the application of pressure to the wearable device via the wearable device (or an electronic device connected to the wearable device) will be described.

[0071] FIG. 4 illustrates an example of a wearable device for measuring a user's biometric information according to various embodiments.

[0072] Referring to FIG. 4, a wearable device (410) may be used to measure a user's biometric information. For example, the wearable device (410) may be implemented in various forms that can be worn by the user, such as a smart watch, a smart band, a smart ring, wireless earphones, or smart glasses. In the following specification, for convenience of explanation, an example in which the wearable device (410) is formed in the form of a watch will be described. For example, the wearable device (410) may correspond to the electronic device (101) of FIG. 1, the electronic device (200) of FIGS. 2A and 2B, and / or the electronic device (300) of FIG. 3. However, the wearable device (410) is not limited thereto. The wearable device (410) may have various structures and may be worn on various body parts of the user (e.g., eyes, fingers, head, or ears).

[0073] According to one embodiment, the wearable device (410) can be connected to and operate with the wearable device (410) and the electronic device (400). For example, the electronic device (400) can control the wearable device (410). The electronic device (400) can control the wearable device (410) based on a user input. For example, the electronic device (400) can identify an input instructing to measure the user's biometric information. The electronic device (400) can measure the user's biometric information using the wearable device (410) based on the identified input. According to an embodiment, the wearable device (410) can identify an input instructing to measure the user's biometric information. The wearable device (410) can measure the user's biometric information based on the identified input.

[0074] For example, the electronic device (400) may provide (or display) a screen for guiding a posture for measuring the user's biometric information through the wearable device (410) via the display (512) of the electronic device (400). As an example, the electronic device (400) may provide (or display) a screen for guiding the application of pressure to the wearable device (410) (or the back of the wearable device (410)) using a part of the user's body (e.g., a thumb) via the display (512). According to an embodiment, the wearable device (410) may also display a screen for guiding a posture for measuring the user's biometric information through the display (524) of the wearable device (410).

[0075] According to one embodiment, the wearable device (410) can emit light toward a part of the user's body (e.g., a thumb, a finger, skin) by using a light-emitting circuit of the wearable device (410) while pressure is applied to the wearable device (410) through a part of the user's body. The wearable device (410) can measure biometric information (e.g., an antioxidant level) of the user based on the reflected light of the emitted light. For example, the wearable device (410) can measure the concentration of carotenoids accumulated in the skin. The wearable device (410) can measure the concentration of carotenoids accumulated in the skin based on identifying the spectral shape of the reflected light. The wearable device (410) can measure the user's antioxidant level based on the concentration of carotenoids.

[0076] For example, the wearable device (410) (or electronic device (400)) can guide the application of pressure greater than a reference pressure through the wearable device (410). The reference pressure can be set differently depending on the user. The wearable device (410) can perform an operation to set (or identify) the reference pressure. The wearable device (410) can start measuring biometric information based on the application of pressure greater than the reference pressure.

[0077] According to one embodiment, the wearable device (410) can identify whether a pressure greater than or equal to a reference pressure is applied using a reference absorbance corresponding to the reference pressure. Below, the operation of the wearable device (410) for identifying whether a pressure greater than or equal to a reference pressure is applied using a reference absorbance corresponding to the reference pressure will be described.

[0078] FIG. 5a illustrates an example of a simplified block diagram of an electronic device and a wearable device.

[0079] Referring to FIG. 5A, the wearable device (410) may correspond to the electronic device (200) of FIGS. 2A and 2B or the electronic device (300) of FIG. 3. Although not illustrated, the wearable device (410) may include at least some or all of the components of the electronic device (200) of FIGS. 2A and 2B or the electronic device (300) of FIG. 3.

[0080] According to one embodiment, the wearable device (410) may include a processor (521), a memory (522), a communication circuit (523), a display (524), and / or a sensor (530). Depending on the embodiment, the wearable device (410) may include at least one of the processor (521), the memory (522), the communication circuit (523), the display (524), and / or the sensor (530). For example, at least some of the processor (521), the memory (522), the communication circuit (523), the display (524), and / or the sensor (530) may be omitted depending on the embodiment.

[0081] According to one embodiment, the processor (521) may correspond to the processor (120) of FIG. 1. The processor (521) may be operatively or operably coupled with or connected to the memory (522), the communication circuit (523), the display (524), and / or the sensor (530). The processor (521) being operatively or operably coupled with the memory (522), the communication circuit (523), the display (524), and / or the sensor (530) may mean that the processor (521) can control the memory (522), the communication circuit (523), the display (524), and / or the sensor (530). For example, the memory (522), the communication circuit (523), the display (524), and / or the sensor (530) may be controlled by the processor (521).

[0082] According to one embodiment, the processor (521) may be composed of at least one processor. For example, the processor (521) may be composed of a main processor that performs high-performance processing and a secondary processor that performs low-power processing.

[0083] According to one embodiment, the processor (521) may include a hardware component for processing data based on one or more instructions. The hardware component 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).

[0084] For example, the processor (521) may include an application processor, a supplementary processor (e.g., a sensor hub, a microcontroller unit (MCU)), a central processor unit (CPU), a neural processing unit (NPU), a graphic processing unit (GPU), and / or a processor for IoT (e.g., a processor integrated with a communication module).

[0085] According to one embodiment, the number of processors (521) may be one or more. For example, the processor (521) may have a multi-core processor structure such as a dual core, a quad core, or a hexa core.

[0086] The processor (521) can control the operations of the wearable device (410) by executing commands stored in the memory (522). For example, the processor (521) may correspond to multiple processors that collectively perform multiple operations by dividing them among the processors.

[0087] According to one embodiment, the processor (521) may apply a correction value stored in the memory (522) to data acquired (or calculated) through an analog front end (AFE) of a sensor (530) (e.g., a biosensor (531)). By applying the correction value to the data, the processor (521) may acquire biometric information (e.g., an antioxidant level) of the user. For example, the processor (521) may convert the biometric information (e.g., an antioxidant level) of the user into a standard score consisting of a reference range (e.g., 0 to 100).

[0088] According to one embodiment, the wearable device (410) may include a memory (522). The memory (522) may be used to store information or data. For example, the memory (522) may be used to store data received from the wearable device (410). For example, the memory (522) may correspond to the memory (130) of FIG. 1. For example, the memory (522) may be a volatile memory unit or units. For example, the memory (522) may be a non-volatile memory unit or units. For example, the memory (522) may be another form of computer-readable media, such as a magnetic or optical disk. For example, the memory (522) may store data acquired based on operations performed by the processor (521) (e.g., algorithm execution operations). According to an embodiment, the memory (522) may be configured in an integrated form with the processor (521).

[0089] For example, the memory (522) may be configured to store data (e.g., sensing data) acquired through a sensor (530) (e.g., a biometric sensor (531)). For example, the memory (522) may be configured to store information on a reference absorbance corresponding to a reference pressure for measuring biometric information.

[0090] According to one embodiment, the wearable device (410) may include a communication circuit (523). The communication circuit (523) may correspond to at least a portion of the communication module (190) of FIG. 1. For example, the communication circuit (523) may be used for various radio access technologies (RATs). For example, the communication circuit (523) may be used to perform Bluetooth communication, wireless local area network (WLAN) communication, Zigbee communication, near field communication (NFC), ultra wide band (UWB) communication, radio-frequency identification (RFID) communication, or ANT+ communication. For example, the communication circuit (523) may be used to perform cellular communication. For example, the processor (521) may establish a connection with another electronic device (e.g., the electronic device (400)) through the communication circuit (523). For example, the processor (521) may identify (or measure) the location of the wearable device (410) based on a wireless signal (e.g., a global positioning system (GPS) / global navigation satellite system (GNSS) signal) received or transmitted by the communication circuit (523). According to an embodiment, the communication circuit (523) may be configured to be integrated with the processor (521).

[0091] According to one embodiment, the wearable device (410) may include a display (524). The display (524) may output visualized information to a user. For example, the display (524) may be controlled by a processor (521) including a circuit such as a graphic processing unit (GPU) to output visualized information to the user. For example, the display (524) may correspond to the display module (160) of FIG. 1. According to an embodiment, the display (524) may include an electrode element for measuring biometric information. The electrode element may include a transparent electrode for identifying touch or pressure. For example, the display (524) may be configured based on a liquid crystal display (LCD), an organic light-emitting diode (OLED), and / or a micro light emitting diode (micro LED).

[0092] For example, the display (524) may be used to provide (or display) notifications to the user. The display (524) may be used to display a screen to provide guidance on posture for measuring biometric information. The display (524) may be used to display a screen to provide the measured biometric information to the user.

[0093] For example, a user's biometric information (e.g., antioxidant level) may be displayed as a score within a reference range (e.g., 0 to 100). The user's biometric information may be displayed in a color (e.g., red, blue) based on the score. The processor (521) may display a screen through the display (524) to indicate one of insufficient, normal, or sufficient nutrients in the blood based on the score. The processor (521) may display a screen through the display (524) to recommend improvement of eating habits to the user. The processor (521) may provide the user with a menu for supplementing the nutrients that are lacking.

[0094] According to one embodiment, the wearable device (410) 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 information about the user. The information about the user may include biometric information (or data about the body) of the user. For example, the sensor (530) may be used to obtain information about the absorbance of the user's skin, information about the user's antioxidant level, body temperature data (or body temperature information), heart rate data (or heart rate information), and / or motion data (or motion information) of the user. For example, the sensor (530) may be composed of at least one sensor. The sensor (530) may include at least one sensor. For example, the sensor (530) may correspond to the sensor module (176) of FIG. 1.

[0095] For example, the sensor (530) may include a biosensor (531). For example, the biosensor (531) may include at least one light-emitting circuit for emitting light and / or at least one light-receiving circuit for receiving light. The biosensor (531) may obtain bioinformation based on the reflection of light emitted from the at least one light-emitting circuit. For example, the biosensor (531) may include a photoplethysmography (PPG) sensor. The biosensor (531) may be used to measure at least one of heart rate (HR), heart rate variability (HRV), blood oxygen saturation (SpO2), and / or blood pressure. In some embodiments, the biosensor (531) may include a biomarker sensor configured to detect a specific substance and / or component within the body. Biomarker sensors can be configured to detect cells, blood vessels, proteins, deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and / or metabolites. Biomarker sensors can detect blood sugar, alcohol, advanced glycation end-products (AGEs), and antioxidant levels as indicators of changes in the body.

[0096] Although not shown, the sensor (530) may further include sensors for acquiring (or identifying, measuring, or detecting) various data about the user. For example, the sensor (530) may include a blood sugar sensor. The processor (521) may identify the user's blood sugar level by identifying (or measuring) the current generated by an electrochemical reaction with blood sugar in the blood. For example, the sensor (530) may include an illuminance sensor for identifying the brightness of the external environment to control the brightness of the display (524).

[0097] For example, the sensor (530) may include an acceleration sensor. The acceleration sensor may be used to identify a change in acceleration of the wearable device (410). As an example, the acceleration sensor may identify (or measure, detect) acceleration of the wearable device (410) in three directions of the x-axis, the y-axis, and the z-axis. For example, the sensor (530) may include a gyro sensor. The gyro sensor may identify (or measure, detect) angular velocity (or rotational velocity) of the wearable device (410) in three directions of the x-axis, the y-axis, and the z-axis. For example, the gyro sensor may identify rotation of the wearable device (410) by identifying a Coriolis effect acting on the wearable device (410). According to an embodiment, the wearable device (410) may include an inertial sensor (e.g., a six-axis inertial sensor) including an acceleration sensor (e.g., a three-axis acceleration sensor) and a gyro sensor (e.g., a three-axis gyro sensor). For example, the inertial sensor may be used to identify motion, gesture, impact, posture, or activity (e.g., movement, sedentary activity, or sports) of the wearable device (410).

[0098] For example, the sensor (530) may include a magnetic sensor for detecting external magnetism (or magnetic field) and measuring direction. For example, the sensor (530) may include a barometric pressure sensor for detecting air pressure and measuring altitude. For example, the sensor (530) may include a temperature sensor. For example, the temperature sensor may measure the skin temperature of a part of the user's body. Based on the skin temperature of a part of the user's body acquired through the temperature sensor, the user's body temperature may be acquired. The temperature sensor may include a contact-type body temperature sensor and / or a non-contact body temperature sensor.

[0099] For example, the sensor (530) may include an electrode sensor. The electrode sensor can detect characteristics of a living body through contact with the living body. The electrode can measure electrical characteristics (e.g., voltage, current, or impedance) of the living body. The processor (521) can measure various physical characteristics by forming an equivalent circuit for the body using the electrode sensor. As an example, the processor (521) can detect electrical signals generated through bodily activities, including an electrocardiogram (ECG), an electromyogram (EMG), and an electroencephalogram (EEG), using the electrode sensor. The processor (521) can measure the state of the living body using the electrical signals.

[0100] In one embodiment, the electrode sensor may include a plurality of electrodes. For example, the electrode sensor may measure a biosignal (e.g., electrodermal activity (EDA) of the skin) using two electrodes. For example, EDA may include skin conductance, galvanic skin response (GSR), electrodermal response (EDR), and psychogalvanic reflex (PRG).

[0101] For example, an electrode sensor may measure a biosignal (e.g., an electrocardiogram) using three electrodes. For example, a first electrode may be in contact with a part of the user's body (e.g., a left wrist). A second electrode may be in contact with another part of the user's body (e.g., a right finger). A third electrode may serve as a grounding function. When a biosignal (e.g., an electrocardiogram) is measured using three electrodes, accuracy may be improved.

[0102] For example, an electrode sensor can measure a biosignal (e.g., body impedance analysis (BIA)) using four electrodes. For example, a processor (521) can measure a user's body composition (e.g., body fat or body water) using the biosignal.

[0103] Although not shown, the wearable device (410) may include a microphone, a speaker, a battery, a PMIC, an antenna, and an actuator. For example, the microphone may be used to detect voice sounds. The wearable device (410) may include one or more microphones. The processor (521) may use the one or more microphones to perform functions such as making calls, calling an artificial intelligence assistant, detecting external noise, and / or performing contextual awareness functions. For example, the speaker may be used to output sounds. The processor (521) may use the speaker to provide notifications through sounds. For example, the battery may be used to store power to power the wearable device (410). For example, the PMIC may be used to manage power of the wearable device (410). The PMIC may be used to distribute and supply power to components of the wearable device (410) (e.g., processor (521), memory (522), communication circuitry (523), display (524), or sensor (530)). The PMIC may include a charging interface. The charging interface may include circuitry (e.g., terminals, pogo pins) for charging a battery through wired charging. The charging interface may include circuitry for supporting wireless charging through the Wireless Power Consortium (WPC) and / or near field communication (NFC). For example, the antenna may be used for wireless communication. The antenna may be composed of a plurality of segmented antennas. At least a portion of the exterior (or housing) of the wearable device (410) may perform the function of the antenna. For example, the actuator may be used to provide vibration. The processor (521) may use the actuator to provide notification through vibration.

[0104] For example, the display (524), speaker, and / or actuator of the wearable device (410) may be referred to as an output device.

[0105] Although illustrated based on different blocks, the embodiment is not limited thereto, and some of the hardware of the wearable device (410) (e.g., at least a portion of the processor (521), memory (522), communication circuitry (523), display (524), and / or sensor (530)) may be included in a single integrated circuit, such as a system on a chip (SoC).

[0106] According to one embodiment, the electronic device (400) may include a processor (511), a display (512), a memory (513), and / or a communication circuit (514). According to an embodiment, the electronic device (400) may include at least one of the processor (511), the display (512), the memory (513), and / or the communication circuit (514). For example, at least some of the processor (511), the display (512), the memory (513), and / or the communication circuit (514) may be omitted according to an embodiment.

[0107] For example, the processor (511) may correspond to the processor (521) of the wearable device (410). The display (512) may correspond to the display (524) of the wearable device (410). The memory (513) may correspond to the memory (522) of the wearable device (410). The communication circuit (514) may correspond to the communication circuit (523) of the wearable device (410).

[0108] According to one embodiment, the wearable device (410) may operate while connected to the electronic device (400). For example, the electronic device (400) may be used to control the wearable device (410). At least some or all of the operations of the wearable device (410) described in the following embodiments may be performed by the electronic device (400).

[0109] FIG. 5b illustrates an example of a biosensor according to various embodiments.

[0110] Referring to FIG. 5b, the biosensor (531) may include a first light-emitting circuit (551), at least one second light-emitting circuit (552), at least one light-receiving circuit (553), an integrated circuit (554), and / or a sensor memory (555).

[0111] According to one embodiment, the first light-emitting circuit (551) and at least one second light-emitting circuit (552) can be configured to emit light via at least one of a lamp, an LED, a laser, and / or a vertical cavity surface emitting laser (VCSEL).

[0112] For example, the first light-emitting circuit (551) may be configured to emit light of a first wavelength (e.g., about 540 [nm] or about 575 [nm]) for measuring the hemoglobin level of blood. The processor (521) may use the first light-emitting circuit (551) to measure the absorbance of the skin corresponding to the hemoglobin level.

[0113] For example, at least one second light-emitting circuit (552) can be configured to emit light of at least one second wavelength for spectrum measurement to measure an antioxidant level. As an example, at least one second light-emitting circuit (552) can include three light-emitting circuits. The at least one second wavelength can include a third wavelength, a fourth wavelength, and a fifth wavelength. At least one second light-emitting circuit (552) can include a third light-emitting circuit, a fourth light-emitting circuit, and a fifth light-emitting circuit. The third light-emitting circuit can be configured to emit light of a third wavelength (e.g., about 405 [nm]). The fourth light-emitting circuit can be configured to emit light of a fourth wavelength (e.g., about 470 [nm]). The fifth light-emitting circuit can be configured to emit light of a fifth wavelength (e.g., about 525 [nm]).

[0114] For example, at least one light-receiving circuit (553) can be configured to detect a reflection of light emitted from the first light-emitting circuit (551) and / or at least one second light-emitting circuit (552). The at least one light-receiving circuit (553) can be configured to identify light reflected and / or transmitted from the user's skin. The at least one light-receiving circuit (553) can be configured based on at least one of a photo diode (PD) and / or a complementary metal oxide semiconductor (CMOS) camera. For example, the at least one light-receiving circuit (553) can identify light in a specified wavelength band using a filter. The at least one light-receiving circuit (553) can filter light in a specified wavelength band using a filter.

[0115] For example, the integrated circuit (554) may be configured to drive a first light-emitting circuit (551) and / or at least one second light-emitting circuit (552). The integrated circuit (554) may include an analog front end (AFE) for filtering and amplifying a signal for light (e.g., reflected light) identified through at least one light-receiving circuit (553). The AFE may be used to convert an analog signal to a digital signal. For example, the integrated circuit (554) may include a PMIC for powering components of the biosensor (531).

[0116] For example, the sensor memory (555) may be configured to store data acquired through the biometric sensor (531). For example, the sensor memory (555) may include a non-volatile memory for maintaining the stored data even when the wearable device (410) is powered off. As an example, the sensor memory (555) may be configured based on an electrically erasable programmable read-only memory (EEPROM) that can be read and written through an electrical signal. According to an embodiment, the sensor memory (555) may be configured based on a flash memory.

[0117] Although an example of a biosensor (531) for identifying a biosignal using light is illustrated in FIG. 5b, the present invention is not limited thereto. The biosensor (531) may also include a circuit for identifying a biosignal using sound waves.

[0118] FIG. 5c illustrates examples of light-emitting circuits and light-receiving circuits arranged in a wearable device according to various embodiments.

[0119] Referring to FIG. 5c, example (580) may represent the back side of the wearable device (410). The back side of the wearable device (410) may correspond to the second side (210B) of FIGS. 2a and 2b.

[0120] According to one embodiment, a plurality of light-emitting circuits and at least one light-receiving circuit (553) may be arranged on the rear surface of the wearable device (410). The plurality of light-emitting circuits and at least one light-receiving circuit (553) may be arranged facing the direction in which the rear surface of the wearable device (410) faces.

[0121] For example, the plurality of light-emitting circuits may include a first light-emitting circuit (551) and at least one second light-emitting circuit (552). The at least one second light-emitting circuit (552) may include a third light-emitting circuit (552-1), a fourth light-emitting circuit (552-2), and a fifth light-emitting circuit (552-3). The first light-emitting circuit (551) may be configured to emit light of a first wavelength (e.g., about 575 [nm]). The third light-emitting circuit (552-1) may be configured to emit light of a third wavelength (e.g., about 405 [nm]). The fourth light-emitting circuit (552-2) may be configured to emit light of a fourth wavelength (e.g., about 470 [nm]). The fifth light-emitting circuit (552-3) may be configured to emit light of a fifth wavelength (e.g., about 525 [nm]). According to an embodiment, the light emitting circuit (e.g., the first light emitting circuit (551) to the fifth light emitting circuit (552-3)) may be referred to as a light emitting element.

[0122] For example, at least one light-receiving circuit (553) may include a first light-receiving circuit (553-1), a second light-receiving circuit (553-2), a third light-receiving circuit (553-3), and a fourth light-receiving circuit (553-4). At least one light-receiving circuit (553) may be arranged spaced apart from the plurality of light-emitting circuits. Depending on the embodiment, the light-receiving circuits (e.g., the first light-receiving circuit (553-1) to the fourth light-emitting circuit (553-4)) may be referred to as light-receiving elements.

[0123] FIG. 6A illustrates a flowchart of the operation of a wearable device according to various embodiments.

[0124] FIG. 6b illustrates a flowchart of the operation of a wearable device according to various embodiments.

[0125] In the following examples, the operations may be performed sequentially, but are not necessarily performed sequentially. For example, the order of the operations may be changed, and at least two operations may be performed in parallel.

[0126] According to one embodiment, operations 610 to 630 of FIG. 6A may relate to operations for determining a reference absorbance according to a user. Operations 640 to 670 of FIG. 6B may relate to operations for measuring biometric information of a user after the reference absorbance is determined. For example, operations 640 to 670 of FIG. 6B may be performed after operations 610 to 630 of FIG. 6A are performed.

[0127] Referring to FIG. 6A, in operation 610, the processor (521) of the wearable device (410) may obtain a first absorbance. For example, the processor (521) may obtain (or identify) the first absorbance based on a first reflection of light of a first wavelength emitted toward a part of the user's body while a pressure of a first intensity (or a first pressure) is applied to the wearable device (410) through a part of the user's body. For example, since the pressure of the first intensity is applied to the wearable device (410) through a part of the user's body, the pressure of the first intensity may be applied to the part of the user's body through the wearable device (410).

[0128] According to one embodiment, the processor (521) can store the first absorbance in the memory (522). According to one embodiment, the processor (521) can transmit the first absorbance to the electronic device (400). The processor (511) of the electronic device (400) can store the first absorbance in the memory (513).

[0129] According to one embodiment, the processor (521) of the wearable device (410) may guide the user to apply light pressure to the wearable device (410) through a part of the user's body. For example, a screen may be displayed through the display (524) of the wearable device (410) to guide the user to apply light pressure to the wearable device (410) through a part of the user's body. For example, a guidance voice may be output through the speaker of the wearable device (410) to guide the user to apply light pressure to the wearable device (410) through a part of the user's body.

[0130] For example, a screen for guiding a user of the electronic device (400) to apply a light pressure to the wearable device (410) through a part of the user's body may be displayed on the display (512) of the electronic device (400). For example, a first screen for guiding a user to apply a first intensity of pressure to the wearable device (410) through a part of the user's body may be displayed on the display (512) of the electronic device (400). The processor (521) may obtain a first absorbance based on the first reflected light while the first screen is displayed on the display (512) of the electronic device (400).

[0131] For example, the processor (521) may guide to apply pressure to the wearable device (410). The processor (521) may guide to apply light pressure to the wearable device (410) using a part of the user's body (e.g., a finger). The processor (521) may emit light of a first wavelength using the first light-emitting circuit (551) while the first intensity of pressure is applied to the wearable device (410) through the part of the user's body. The processor (521) may emit light of the first wavelength toward the part of the user's body using the first light-emitting circuit (551). The processor (521) may identify a first reflection of the light of the first wavelength using at least one light-receiving circuit (553). The processor (521) may obtain a first absorbance based on the first reflection.

[0132] According to one embodiment, the processor (521) can obtain a first absorbance based on a first reflection of light of a first wavelength while a first pressure (or a pressure of a first intensity) is applied to a part of the user's body.

[0133] In operation 620, the processor (521) may obtain a second absorbance. For example, the processor (521) may obtain (or identify) the second absorbance based on a second reflection of light of a first wavelength emitted toward a part of the user's body while a pressure of a second intensity is applied to the wearable device (410) through a part of the user's body. For example, the processor (521) may obtain the second absorbance based on a second reflection of light of a first wavelength emitted toward a part of the user's body while a pressure of a second intensity, distinct from the first intensity, is applied to the wearable device (410) through a part of the user's body. For example, since a pressure of the second intensity is applied to the wearable device (410) through a part of the user's body, a pressure of the second intensity may be applied to a part of the user's body through the wearable device (410).

[0134] According to one embodiment, the processor (521) can store the second absorbance in the memory (522). According to one embodiment, the processor (521) can transmit the second absorbance to the electronic device (400). The processor (511) of the electronic device (400) can store the second absorbance in the memory (513).

[0135] According to one embodiment, the processor (521) of the wearable device (410) may guide the user to apply strong pressure to the wearable device (410) through a part of the user's body.

[0136] For example, a screen may be displayed on the display (512) of the electronic device (400) to guide the user to apply strong pressure to a part of the body. For example, a second screen may be displayed on the display (512) of the electronic device (400) to guide the user to apply a second intensity of pressure to a part of the body through the wearable device (410). The processor (521) may obtain the second absorbance based on the second reflected light while the second screen is displayed on the display (512) of the electronic device (400). According to an embodiment, a screen may be displayed on the display (524) of the wearable device (410) to guide the user to apply strong pressure to a part of the body.

[0137] For example, the processor (521) may guide to apply pressure to the wearable device (410). The processor (521) may guide to apply strong pressure to the wearable device (410) using a part of the user's body (e.g., a finger). The processor (521) may emit light of a first wavelength using the first light-emitting circuit (551) while the second intensity of pressure is applied to the wearable device (410) through the part of the user's body. The processor (521) may emit light of the first wavelength toward the part of the user's body using the first light-emitting circuit (551). The processor (521) may identify a second reflection of the light of the first wavelength using at least one light-receiving circuit (553). The processor (521) may obtain a second absorbance based on the second reflection.

[0138] In one embodiment, the processor (521) can obtain a second absorbance based on a second reflection of light of the first wavelength while a second pressure (or pressure of the second intensity) is applied to a part of the user's body.

[0139] According to operations 610 and 620, the absorbance (e.g., first absorbance or second absorbance) can be obtained (or identified) based on the amount of emitted light (e.g., LED light amount) and the amount of light identified (or measured) through at least one light receiving circuit (553). For example, the absorbance can be obtained based on the following mathematical formula.

[0140]

[0141] The above mathematical formula 1 is merely an example to aid understanding, and embodiments of the present disclosure may not be limited thereto. For example, the above mathematical formula 1 may be modified, applied, or expanded in various ways.

[0142]

[0143] According to one embodiment, the absorbance identified in a portion of the user's body may be obtained differently depending on the pressure. For example, a first absorbance obtained while a first pressure is applied to a portion of the user's body may be different from a second absorbance obtained while a second pressure is applied to a portion of the user's body. When the magnitude of the first pressure is smaller than the magnitude of the second pressure, the magnitude of the first absorbance may be larger than the magnitude of the second absorbance.

[0144] Depending on the embodiment, the order of operations 610 and 620 may be changed.

[0145] In operation 630, the processor (521) may determine a reference absorbance. For example, the processor (521) may determine the reference absorbance based on the first absorbance and the second absorbance. For example, the processor (521) may identify a reference absorbance between the first absorbance and the second absorbance. The processor (521) may identify a reference absorbance corresponding to a reference pressure for measuring biometric information. If an absorbance lower than the reference absorbance is identified, the processor (521) may identify that a pressure exceeding the reference pressure has been applied to a part of the user's body. The change in absorbance according to pressure will be described later in FIG. 7A.

[0146] Referring to FIG. 6B, operations 640 to 670 may be performed after the reference absorbance is determined. In some embodiments, when the reference absorbance is fixed, the processor (521) may perform operations 640 to 670 without performing operations 610 to 630.

[0147] Referring to operation 640, the processor (521) can identify the start of measurement of the user's biometric information. For example, the processor (521) can identify an input for the start of measurement of the user's biometric information.

[0148] According to one embodiment, the processor (511) of the electronic device (400) can identify an input for initiating measurement of the user's biometric information. Based on the identified input, the processor (511) can request the wearable device (410) to begin measuring the user's biometric information. Based on the request, the processor of the wearable device (410) can identify the start of measurement of the user's biometric information.

[0149] According to one embodiment, the wearable device (410) may include an output device including at least one of a speaker, a display (524), or an actuator. In response to the start of measurement of biometric information, the processor (521) may provide a notification through the output device to guide the user to apply pressure to the wearable device (410) through a part of the user's body. For example, the processor (521) may use the speaker to provide a notification through sound to guide the user to apply pressure to the wearable device (410) through a part of the user's body. For example, the processor (521) may use the display (524) to provide a notification through a screen to guide the user to apply pressure to the wearable device (410) through a part of the user's body. For example, the processor (521) may use the actuator to provide a notification through vibration to guide the user to apply pressure to the wearable device (410).

[0150] In operation 650, the processor (521) can determine whether the identified absorbance is less than the reference absorbance. For example, the processor (521) can determine whether the identified absorbance is less than the reference absorbance based on a third reflected light for light of a first wavelength emitted toward a part of the user's body, based on the start of the measurement of the biometric information.

[0151] For example, the processor (521) may identify whether the absorbance identified based on the third reflected light is less than the reference absorbance to identify whether a pressure greater than the reference pressure has been applied to a part of the user's body.

[0152] In operation 660, if the identified absorbance is less than the reference absorbance, the processor (521) may measure the user's biometric information. For example, the processor (521) may measure the user's biometric information based on identifying that the identified absorbance is less than the reference absorbance based on the third reflected light.

[0153] In one embodiment, the processor (521) may initiate measurement of the user's biometric information based on identifying that the absorbance identified based on the third reflected light is less than a reference absorbance. For example, the processor (521) may measure the biometric information based on a fourth reflected light for at least one second wavelength of light emitted toward a part of the user's body while the absorbance identified based on the third reflected light remains less than the reference absorbance. The processor (521) may emit at least one second wavelength of light using at least one second light-emitting circuit (552) while the absorbance identified based on the third reflected light remains less than the reference absorbance. The processor (521) may obtain biometric information (e.g., antioxidant level) based on the fourth reflected light for at least one second wavelength of light. In some embodiments, the processor (521) may use a third reflected light for light of the first wavelength and a fourth reflected light for light of at least one second wavelength to obtain biometric information. For example, the processor (521) may obtain biometric information of the user based on the third reflected light and the fourth reflected light.

[0154] In operation 670, if the identified absorbance is not less than the reference absorbance, the processor (521) may provide a notification to guide the user to increase the pressure applied to the wearable device (410). For example, the processor (521) may provide a notification to guide the user to increase the pressure applied to the wearable device (410) based on identifying that the identified absorbance based on the third reflected light is greater than or equal to the reference absorbance. The processor (521) may use an output device (e.g., a display (524), a speaker, or an actuator) to provide the notification to guide the user to increase the pressure applied to the wearable device (410).

[0155] According to one embodiment, after providing the notification, the processor (521) may perform operation 650 again. Based on providing the notification, the processor (521) may identify (or monitor) the absorbance based on the third reflected light.

[0156] FIG. 7a illustrates an example of a graph showing absorbance as a function of wavelength, according to various embodiments.

[0157] FIG. 7b illustrates an example of a graph showing absorbance as a function of pressure, according to various embodiments.

[0158] FIG. 7c illustrates an example of a graph showing absorbance according to a user, according to various embodiments.

[0159] Referring to Figures 7A to 7C, in addition to antioxidants, other components, including flavonoids, hemoglobin, or oxyhemoglobin, may exist within the skin. Therefore, spectra for all components within the skin can be acquired through the biosensor (531) (or antioxidant sensor). The biosensor (531) can measure spectra for antioxidants using light of multiple wavelengths.

[0160] The amount of blood in the skin can decrease as pressure on a part of the body increases. As the amount of blood in the skin decreases, the accuracy of the spectrum for antioxidant substances can increase. Accordingly, the processor (521) of the wearable device (410) can obtain biometric information (e.g., antioxidant level) of the user while pressure is applied to a part of the user's body through the wearable device (410). For example, if pressure exceeding a reference pressure is applied to a part of the user's body, accurate biometric information (e.g., antioxidant level) of the user can be identified. As shown in FIG. 6B, the processor (521) can identify whether the identified absorbance is less than the reference absorbance based on the reflected light for the first wavelength (e.g., the third reflected light in FIG. 6B) without a pressure sensor. Based on identifying that the identified absorbance is less than the reference absorbance, the processor (521) can identify that pressure exceeding the reference pressure has been applied to a part of the user's body. The processor (521) can identify that pressure exceeding a reference pressure is applied to a part of the user's body using only the first light-emitting circuit (551) without a pressure sensor.

[0161] Referring to FIG. 7A, graphs (701), (702), and (703) represent changes in absorbance according to wavelength. The vertical axes of graphs (701) to (703) represent absorbance. The horizontal axes of graphs (701) to (703) represent wavelength (nm). Graph (701) represents changes in absorbance according to wavelength while strong pressure is applied to a part of the body (or skin). Graph (702) represents changes in absorbance according to wavelength while medium pressure is applied to a part of the body (or skin). Graph (703) represents changes in absorbance according to wavelength while weak pressure is applied to a part of the body (or skin).

[0162] The wavelength range (705) may be associated with at least one second wavelength for acquiring the user's biometric information. Referring to the wavelength range (705), as the pressure increases, the absorbance may decrease at the same wavelength. Therefore, the higher the pressure, the more accurate the biometric information (e.g., antioxidant level) can be measured. For example, in a weak pressure range where the absorbance changes depending on the pressure, the antioxidant value calculated based on the absorbance may also change. Therefore, when the absorbance is measured in a range above the reference pressure, more accurate biometric information (e.g., antioxidant level) can be measured.

[0163] Wavelength range (706) may be associated with a first wavelength for identifying pressure. For light of the first wavelength, the absorbance may vary significantly with pressure. Therefore, the processor (521) may use reflected light of the first wavelength to determine whether the absorbance identified is below a reference value. For example, a spectral peak for hemoglobin may be detected at the first wavelength, and the spectral change may be significant with pressure. Therefore, the first wavelength within the wavelength range (706) may be utilized to identify pressure.

[0164] Referring to Fig. 7b, a graph (710) represents an antioxidant index according to pressure. The vertical axis of the graph (710) represents an antioxidant index. The horizontal axis of the graph (710) represents pressure (kgf). For example, in the pressure section (711), the antioxidant index may change significantly depending on the pressure. If a pressure exceeding the pressure section (711) is applied to a part of the user's body (e.g., skin), the change in the antioxidant index according to the pressure may not be significant. Accordingly, the processor (521) may identify the pressure (712) as a reference pressure. The processor (521) may acquire the user's biometric information while a pressure exceeding the pressure (712) is applied to a part of the user's body. If the user's biometric information is acquired while the pressure exceeding the pressure (712) is applied to a part of the user's body, the user's biometric information may be acquired stably.

[0165] Referring to Fig. 7c, graph (720) represents the change in absorbance according to pressure for a first user. Graph (730) represents the change in absorbance according to pressure for a second user. Graph (740) represents the change in absorbance according to pressure for a third user. The vertical axes of graphs (720) to (740) represent values ​​indicating users. The horizontal axes of graphs (720) to (740) represent absorbance.

[0166] For example, in graphs (720) to (740), arrows represent changes in absorbance as pressure changes from a first pressure to a second pressure. For example, according to graph (720), point (721) represents an absorbance identified while a first pressure is applied to a part of the body of the first user. Point (722) represents an absorbance identified while a second pressure greater than the magnitude of the first pressure is applied to a part of the body of the first user. Point (723) represents a reference absorbance according to the first user.

[0167] According to graph (730), point (731) represents the absorbance identified while a first pressure is applied to a part of the body of the second user. Point (732) represents the absorbance identified while a second pressure greater than the magnitude of the first pressure is applied to a part of the body of the second user. Point (733) represents the reference absorbance according to the second user.

[0168] According to graph (740), point (741) represents the absorbance identified while a first pressure is applied to a part of the body of a third user. Point (742) represents the absorbance identified while a second pressure greater than the magnitude of the first pressure is applied to a part of the body of the third user. Point (743) represents the reference absorbance according to the third user.

[0169] Referring to graphs (720), (730), and (740), a reference absorbance can be determined based on a first absorbance obtained (or identified) while a first pressure is applied and a second absorbance obtained (or identified) while a second pressure is applied. The reference absorbance can be identified based on the following mathematical equation.

[0170]

[0171] Referring to mathematical formula 2, A TH is the reference absorbance. A F1 is the first absorbance obtained while the first pressure is applied. A F2 is the second absorbance obtained while the second pressure is applied. Mathematical expression 2 is exemplary, and depending on the embodiment, the reference absorbance may be determined in various ways. Mathematical expression 2 is merely an example to aid understanding, and the embodiments of the present disclosure may not be limited thereto. For example, Mathematical expression 2 may be modified, applied, or expanded in various ways.

[0172] Referring to graphs (720), (730), and (740), changes in blood volume according to skin color and pressure may vary depending on the user. For example, if the reference absorbance is determined to be the same for the first user, the second user, and the third user, accurate biometric information may not be obtained for all users. For example, if the reference absorbance is set to point (723) (e.g., "0.9"), accurate biometric information may be obtained only for the first user, and not for the second and third users.

[0173] Accordingly, the processor (521) can determine the individual reference pressure by determining the reference absorbance according to the user. The processor (521) can provide the user with an optimal pressure guide by using the reference pressure corresponding to the reference absorbance. According to one embodiment, the account information regarding the wearable device (410) can be changed according to a change in the user of the wearable device (410). The processor (521) of the wearable device (410) can perform a process for resetting the reference absorbance based on identifying that the account information regarding the wearable device (410) has been changed. For example, the processor (521) can perform operations 610 to 630 of FIG. 6A and determine the reference absorbance according to the changed user based on identifying that the account information regarding the wearable device (410) has been changed.

[0174] FIG. 8 illustrates an example of the operation of an electronic device and a wearable device for determining a reference absorbance according to various embodiments.

[0175] Referring to FIG. 8, the processor (511) of the electronic device (400) can display a screen to guide the user's posture for operations 610 to 630 of FIG. 6a using the display (512) of the electronic device (400).

[0176] According to one embodiment, the processor (511) may display a first screen (820) to guide the user to apply a first intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). For example, the first screen (820) may include text (821) to instruct the user to apply the first intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The first screen (820) may include an object (822) to indicate a posture (811) in which the user applies the first intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The object (822) may include an object (823) indicating the first intensity.

[0177] For example, while the first screen (820) is displayed through the display (512) of the electronic device (400), the processor (521) of the wearable device (410) can obtain the first absorbance.

[0178] According to one embodiment, the processor (511) may display a second screen (830) to guide the user to apply the second intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). For example, the second screen (830) may include text (831) to instruct the user to apply the second intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The second screen (830) may include an object (833) to indicate a posture (812) in which the user applies the second intensity of pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The object (833) may include an object (832) indicating the second intensity.

[0179] For example, while the second screen (830) is displayed through the display (524) of the electronic device (400), the processor (521) of the wearable device (410) can obtain the second absorbance.

[0180] According to one embodiment, the wearable device (410) may display a screen (840) to indicate that the process for determining the reference absorbance is complete based on obtaining the first absorbance and the second absorbance. The screen (840) may include text (841) indicating that the process for determining the reference absorbance is complete. The screen (840) may include an object (842) to indicate a posture (813) in which pressure applied through the wearable device (410) is released. According to one embodiment, the screen (840) may indicate that both the first absorbance and the second absorbance are obtained. According to one embodiment, while the screen (840) is displayed on the display (512) of the electronic device (400), a screen indicating that the process for determining the reference absorbance is complete may be displayed on the display (524) of the wearable device (410).

[0181] According to one embodiment, the processor (521) of the wearable device (410) may determine a reference absorbance based on the first absorbance and the second absorbance. For example, after the reference absorbance is determined, the processor (511) of the electronic device (400) may display a screen. For example, the processor (511) may display a screen to indicate that the reference absorbance has been determined.

[0182] According to an embodiment, the electronic device (400) may repeatedly display the first screen (820) and the second screen (830) to repeatedly obtain the first absorbance and the second absorbance. Accordingly, the accuracy of the first absorbance and the second absorbance criteria may be further improved.

[0183] According to an embodiment, when an error in the first absorbance is identified, the first screen (820) may be displayed through the display (512) of the electronic device (400), and the first absorbance may be re-obtained through the biosensor (531) of the wearable device (410). According to an embodiment, when an error in the second absorbance is identified, the second screen (830) may be displayed through the display (512) of the electronic device (400), and the second absorbance may be re-obtained through the biosensor (531) of the wearable device (410).

[0184] FIG. 9 illustrates an example of the operation of an electronic device and a wearable device for obtaining a user's biometric information according to various embodiments.

[0185] Referring to FIG. 9, the processor (511) of the electronic device (400) can display a screen to guide the user's posture for operations 640 to 660 of FIG. 6b using the display (512) of the electronic device (400).

[0186] According to one embodiment, the processor (511) may display a screen (920) to guide the user to apply pressure greater than a reference pressure to the wearable device (410) through a part of the user's body (e.g., a finger). For example, the screen (920) may include text (921) to instruct the user to apply pressure greater than a reference pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The screen (920) may include an object (922) to indicate a posture (911) in which the user applies pressure greater than the reference pressure to the wearable device (410) through a part of the user's body (e.g., a finger). The object (922) may include an object (923) indicating pressure greater than the reference pressure.

[0187] According to one embodiment, the processor (521) of the wearable device (410) can identify that the identified absorbance based on the reflected light for the light of the first wavelength is less than the reference absorbance. Based on identifying that the identified absorbance is less than the reference absorbance, the processor (521) of the wearable device (410) can identify that the pressure applied to a part of the user's body through the wearable device (410) is greater than the reference pressure. Based on identifying that the identified absorbance is less than the reference absorbance, the processor (521) can initiate measurement of the user's biometric information.

[0188] The processor (511) of the electronic device (400) may display a screen (930) through the display (512) to guide the user to maintain his / her posture (912) (or pressure) based on the start of measurement of the user's biometric information. For example, the screen (930) may include text (931) to guide the user to maintain his / her posture (912). The screen (930) may include an object (932) to indicate the user's posture (912). The object (932) may include an object (933) to indicate the magnitude of pressure applied to the wearable device (410) through a part of the user's body.

[0189] According to one embodiment, the electronic device (400) may display a screen (940) after the measurement of the user's biometric information is completed through the biometric sensor (531) of the wearable device (410). For example, the screen (940) may include text (941) indicating that the measurement of the biometric information is completed. The screen (940) may include an object (942) for indicating the measurement result of the biometric information. The screen (940) may include text (943) for indicating feedback according to the measurement result. Although not illustrated, the screen (940) may include an object for indicating a posture (913) in which pressure applied through the wearable device (410) is released. According to one embodiment, while the screen (940) is displayed on the display (512) of the electronic device (400), a screen indicating that measurement of biometric information has been completed may be displayed on the display (524) of the wearable device (410).

[0190] FIG. 10 illustrates an example of operation of a wearable device for identifying capillary refill time according to various embodiments.

[0191] Referring to FIG. 10, the processor (521) of the wearable device (410) can perform an operation to identify a capillary refill time. In example (1010), the processor (521) of the wearable device (410) can guide the application of pressure to a part of the user's body through the wearable device (410) so that an absorbance lower than a reference absorbance is identified. For example, the processor (521) can guide the application of pressure for a specific period of time (e.g., 5 seconds). The processor (521) can obtain biometric information by using the reflected light for at least one second wavelength of light emitted using at least one second light-emitting circuit (552) while the pressure is maintained for the specific period of time.

[0192] In example (1020), the processor (521) may guide the release of pressure after the pressure has been maintained for a reference time. The processor (521) may identify the time from the point at which the pressure is released to the point at which the user's normal absorbance is identified. Based on the identified time, the processor (521) may identify the user's capillary refill time.

[0193] In example (1030), the processor (521) may display a result screen regarding the user's capillary refill time via the display (524). For example, the processor (521) may determine that the user's capillary refill time is normal based on identifying that the capillary refill time is less than a reference time (e.g., 3 seconds). The processor (521) may determine that the user's capillary refill time is abnormal based on identifying that the capillary refill time is greater than or equal to a reference time (e.g., 3 seconds). The processor (521) may provide the user with a screen regarding the identified results.

[0194] Figure 11 illustrates a flowchart of the operation of a wearable device according to various embodiments. In the embodiments below, each operation may be performed sequentially, but is not necessarily performed sequentially. For example, the order of each operation may be changed, and at least two operations may be performed in parallel.

[0195] Referring to FIG. 11, in operation 1110, the processor (521) can identify that the user is wearing the wearable device (410). The processor (521) can identify that the wearable device (410) is worn on a part of the user's body. For example, the processor (521) can identify that the wearable device (410) is worn on a part of the user's body based on emitting light using the first light emitting circuit (551) (or at least one second light emitting circuit (552)) and identifying reflected light for the emitted light using at least one light receiving circuit (553).

[0196] In operation 1120, the processor (521) can emit light of a first wavelength based on a specified time interval using the first light-emitting circuit (551). The processor (521) can identify reflected light for the light of the first wavelength. The processor (521) can identify absorbance based on the reflected light for the light of the first wavelength. The processor (521) can identify whether the identified absorbance is less than a reference absorbance. Operation 1120 may correspond to operation 650 of FIG. 6B.

[0197] For example, the processor (521) can identify the pressure caused by wearing the wearable device (410) at designated time intervals. Based on identifying the pressure caused by wearing the wearable device (410), the processor (521) can identify whether the wearable device (410) is worn loosely or whether the pressure continuously changes depending on the user's activity (e.g., exercise). The processor (521) can identify whether the pressure caused by wearing the wearable device (410) is maintained within a reference range.

[0198] In operation 1130, the processor (521) may measure the user's biometric information based on determining that the identified absorbance is less than the reference absorbance. For example, the processor (521) may measure the user's biometric information based on determining that the identified absorbance remains less than the reference absorbance. For example, operation 1130 may correspond to operation 660 of FIG. 6B .

[0199] Referring to operations 1110 to 1130, the processor (521) can measure the user's biometric information even when the user does not apply pressure to a part of the user's body through the wearable device (410), if the pressure caused by wearing the wearable device (410) is maintained within a reference range.

[0200] FIG. 12 illustrates an exploded perspective view of an exemplary wearable device according to various embodiments.

[0201] Referring to FIG. 12, the wearable device (410) may include a pressure sensor (1220). For example, the pressure sensor (1220) may include an ultra-thin film-type pressure sensor.

[0202] According to one embodiment, the pressure sensor (1220) may be disposed between the first component (1210) and the second component (1230) of the wearable device (410). For example, the first component (1210) may include the side bezel structure (310), the wheel key (320), the front plate (201), the display (220), the first antenna (350), the second antenna (355), the support member (360) (e.g., a bracket), the battery (370), and the printed circuit board (380) illustrated in FIG. 3. For example, the second component (1230) may include the sealing member (390) and the back plate (393). The first component (1210) and the second component (1230) described above are exemplary and are not limited thereto. The pressure sensor (1220) may be placed inside or outside the wearable device (410).

[0203] According to one embodiment, when the wearable device (410) includes a pressure sensor (1220), the processor (521) can obtain the user's biometric information while a pressure greater than a reference pressure is applied to the wearable device (410).

[0204] FIG. 13A illustrates an example of a structure of a wearable device according to various embodiments;

[0205] FIG. 13b illustrates an example of operation of a wearable device for obtaining user biometric information according to various embodiments.

[0206] Referring to FIG. 13A, a wearable device (1300) (e.g., the wearable device (410) of FIG. 4) may include a housing (1301) having a first side (1311) facing a part of a user's body (e.g., a finger) and a second side (1312) opposite the first side (1311). For example, the wearable device (1300) may include a ring-shaped housing (1301). As an example, the wearable device (1300) may be configured in a ring shape.

[0207] According to one embodiment, the wearable device (1300) may be referred to as a wearable device that can be worn by a user. The wearable device (1300) may be worn on a part of the user's body (e.g., a finger). For example, the wearable device (1300) may be worn on a part of the user's body. For example, the wearable device (1300) may be fastened to a part of the user's body. For example, the wearable device (1300) may be detachable from a part of the user's body. For example, the wearable device (1300) may have a shape corresponding to a part of the user's body in order to be worn on a part of the user's body.

[0208] For example, the wearable device (1300) may be worn by the user and thus come into contact with a part of the user's body. For example, the wearable device (1300) may be configured to obtain information about the user through a part of the user's body by being worn by the user. As an example, the information about the user may include the user's health information. However, the present invention is not limited thereto. For example, the wearable device (1300) may provide information about the user through the wearable device (1300) and / or an external electronic device connected to the wearable device (1300). However, the present invention is not limited thereto.

[0209] According to one embodiment, at least a portion of the first surface (1311) may come into contact with a part of the user's body when the wearable device (1300) is worn by the user. For example, the first surface (1311) may surround a part of the user's body on which the wearable device (1300) is worn. For example, the first surface (1311) may cover a part of the user's body on which the wearable device (1300) is worn. For example, the first surface (1311) may be configured to pressurize a part of the user's body when the wearable device (1300) is worn by the user, thereby fastening the wearable device (1300) to the part of the body. For example, the first surface (1311) may be deformable by a part of the user's body. For example, the wearable device (1300) can provide information about the user through the first side (1311) based on haptic technology.

[0210] For example, the second surface (1312) may form an outer appearance of the wearable device (1300) together with the first surface (1311). For example, the second surface (1312) may form a ring-shaped housing (1301) together with the first surface (1311). For example, the second surface (1312) may be a surface that is spaced apart from a part of the user's body when the wearable device (1300) is worn by the user. For example, the first surface (1311) may be referred to as an inner circumference surface of the housing (1301). The second surface (1312) opposite to the first surface (1311) may be referred to as an outer circumference surface of the housing (1301).

[0211] According to one embodiment, the wearable device (1300) may further include a hole (1370) formed by the first surface (1311) for passing a part of the user's body through the wearable device (1300) when the wearable device (1300) is worn by the user. For example, the hole (1370) may be penetrated by a part of the user's body when the wearable device (1300) is worn by the user. The wearable device (1300) may be configured to be fastened to a part of the user's body when the user wears the wearable device (1300) by including a hole (1370) configured to pass a part of the user's body through the hole.

[0212] According to one embodiment, a ring-shaped housing (1301) may include a first side (1311) that comes into contact with a user's body when worn by a user, a second side (1312) that is exposed to the outside, and a side surface between the first side (1311) and the second side (1312). For example, a space may be included between the first side (1311) and the second side (1312) to include (or place) at least one component (e.g., a processor (1310), a communication circuit (1320), a sensor (1330), and a memory (1340)).

[0213] According to one embodiment, a PCB (1351) may be disposed between a first side (1311) and a second side (1312) of a wearable device (1300). For example, a processor (1310), a communication circuit (1320), an acceleration sensor (1331), a gyro sensor (1332), a biosensor (1333), a temperature sensor (1334), a memory (1340), and / or a PMIC (1354) may be disposed on the PCB (1351). For example, the PCB (1351) may be composed of a rigid region and a flexible region. As an example, the rigid region may be referred to as a rigid flexible printed circuit board (RFPCB). As an example, the flexible region may be referred to as a flexible printed circuit board (FPCB).

[0214] For example, the PMIC (1354) can be used to manage power of the wearable device (1300). The PMIC (1354) can be used to provide (or distribute) power to components that require power in the wearable device (1300). The PMIC (1354) can support a wired charging method (e.g., terminal, pogo pin) or a wireless charging method (e.g., wireless power consortium (WPC), NFC) for charging the wearable device (1300) through the charging interface (1353).

[0215] According to one embodiment, a battery (1352) may be disposed between the first side (1311) and the second side (112) of the wearable device (1300). The battery (1352) may be configured with at least one battery (or battery pack). For example, the battery (1352) may be configured such that at least one battery is connected in series and / or in parallel. For example, the battery (1352) may be configured as a flexible battery pack. For example, the battery (1352) may be charged and / or discharged as a secondary battery. For example, the material constituting the battery (1352) may be configured in various ways. For example, the material constituting the battery (1352) may include at least one of lithium ion and mercury.

[0216] According to one embodiment, an antenna (1355) may be positioned between the first side (1311) and the second side (1312) of the wearable device (1300). For example, the antenna (1355) may be composed of a single antenna and / or multiple segmented antennas. According to an embodiment, the antenna (1355) may be composed of a part of the housing (1301) of the wearable device (1300). For example, the antenna (1355) may be electrically connected to the communication circuit (1320) via the PCB (1351).

[0217] For example, the biosensor (1333) may correspond to the biosensor (531) of FIG. 5B. As an example, the biosensor (1333) may include a first light-emitting circuit (1333-1), at least one second light-emitting circuit (1333-2), at least one light-receiving circuit (1333-3), and an integrated circuit (1333-4). The first light-emitting circuit (1333-1), at least one second light-emitting circuit (1333-2), and at least one light-receiving circuit (1333-3) may be arranged toward the first surface (1311). As an example, the integrated circuit (1333-4) may be arranged toward the second surface (1312).

[0218] Although not illustrated, the wearable device (1300) may include various other components in addition to the illustrated components. For example, the wearable device (1300) may include a display. The display may be positioned on the outer surface of the housing (1301).

[0219] According to one embodiment, the processor (1310) can identify the wearing state of the wearable device (1300) based on the reflected light for the first wavelength of light emitted using the first light-emitting circuit (1333-1). The processor (1310) can identify whether the wearable device (1300) is worn loosely or tightly based on the reflected light for the first wavelength of light.

[0220] Referring to FIG. 13b, the processor (1310) can acquire the user's biometric information while the wearable device (1300) is worn on the user's finger. For example, the processor (1310) can identify a reference absorbance to acquire the user's biometric information.

[0221] According to one embodiment, while a user applies a first amount of pressure in a direction (1390) toward the palm of the hand on which the wearable device (1300) is worn, the processor (1310) may obtain a first absorbance. The processor (1310) may emit light of a first wavelength using the first light-emitting circuit (1333-1). The processor (1310) may obtain the first absorbance based on the first reflected light for the light of the first wavelength.

[0222] While the user applies a second intensity of pressure in the direction (1390) toward the palm of the hand wearing the wearable device (1300), the processor (1310) can obtain a second absorbance. The processor (1310) can emit light of a first wavelength using the first light-emitting circuit (1333-1). The processor (1310) can obtain the second absorbance based on the second reflected light for the light of the first wavelength. The processor (1310) can determine a reference absorbance based on the first absorbance and the second absorbance.

[0223] According to one embodiment, after the reference absorbance is determined, the processor (1310) can identify the absorbance based on the third reflected light for the light of the first wavelength to identify the user's biometric information. For example, the processor (1310) can guide the application of force to a fixed object in the direction (1390) toward the palm. Based on the force applied to the fixed object in the direction (1390), the processor (1310) can identify that the identified absorbance is less than the reference absorbance. The processor (1310) can acquire the user's biometric information while the identified absorbance remains less than the reference absorbance.

[0224] According to one embodiment, a wearable device may include a first light-emitting circuit configured to emit light of a first wavelength, at least one second light-emitting circuit configured to emit light of at least one second wavelength, at least one light-receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength, a memory storing instructions and including one or more storage media, and at least one processor including a processing circuit. The instructions, when individually and / or collectively executed by the at least one processor, obtain a first absorbance based on a first reflection light for light of the first wavelength emitted toward the body part of the user while a pressure of a first intensity is applied to the wearable device through the body part of the user, and obtain a second absorbance based on a second reflection light for light of the first wavelength emitted toward the body part of the user while a pressure of a second intensity, which is distinct from the first intensity, is applied to the wearable device through the body part of the user, and determine a reference absorbance based on the first absorbance and the second absorbance, and after the reference absorbance is determined, identify the start of measurement of the biometric information of the user, and identify that the identified absorbance is less than the reference absorbance based on a third reflection light for light of the first wavelength emitted toward the body part of the user based on the start of the measurement, and The wearable device may be caused to measure the biometric information based on a fourth reflected light for the at least one second wavelength of light emitted toward a part of the body of the user while the identified absorbance based on the reflected light remains below the reference absorbance.

[0225] For example, the wearable device may include a communication circuit. The instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to obtain the first absorbance based on the first reflected light while a first screen for guiding the user to apply the first intensity of pressure to the wearable device through a part of the body of the user is displayed on a display of an external electronic device connected to the wearable device, and to obtain the second absorbance based on the second reflected light while a second screen for guiding the user to apply the second pressure to the wearable device through a part of the body of the user is displayed on the display.

[0226] For example, the reference absorbance can be determined between the first absorbance and the second absorbance.

[0227] For example, the wearable device may include an output device comprising at least one of a speaker, a display, or an actuator. The instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to provide a notification through the output device to guide the user to apply pressure to the wearable device through a part of the body in response to the initiation of the measurement.

[0228] For example, the instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to provide a notification through the output device to guide the user to maintain the pressure applied to the wearable device through the part of the body in response to identifying that the absorbance identified based on the third reflected light is less than the reference absorbance.

[0229] For example, the instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to obtain at least one absorbance for each of the at least one second wavelengths of light, and to measure the biometric information based on the at least one absorbance.

[0230] For example, the bio-information may include an antioxidant level.

[0231] For example, the instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to: identify that the pressure applied to the wearable device through a portion of the body of the user is released after the absorbance identified based on the third reflected light is identified as being less than the reference absorbance; identify a time from the time the pressure is released to the time the absorbance in the normal state of the user is identified; and identify a capillary filling time of the user based on the identified time.

[0232] For example, the at least one second wavelength may include a third wavelength, a fourth wavelength, and a fifth wavelength, and the at least one second light-emitting circuit may include a third light-emitting circuit configured to emit light of the third wavelength, a fourth light-emitting circuit configured to emit light of the fourth wavelength, and a fifth light-emitting circuit configured to emit light of the fifth wavelength.

[0233] For example, the instructions, when individually and / or collectively executed by the at least one processor, may cause the wearable device to perform a process for resetting the reference absorbance based on identifying that account information about the wearable device has changed.

[0234] According to one embodiment, a method performed in a wearable device comprises: obtaining a first absorbance based on a first reflection light for light of a first wavelength emitted toward a body part of a user while a pressure of a first intensity is applied to the wearable device through a body part of the user; obtaining a second absorbance based on a second reflection light for light of the first wavelength emitted toward a body part of the user while a pressure of a second intensity, which is distinct from the first intensity, is applied to the wearable device through the body part of the user; determining a reference absorbance based on the first absorbance and the second absorbance; identifying a start of measurement of biometric information of the user after the reference absorbance is determined; identifying, based on the start of the measurement, that the identified absorbance is less than the reference absorbance based on a third reflection light for light of the first wavelength emitted toward the body part of the user; and determining a second absorbance based on the third reflection light. The method may include measuring the biometric information based on a fourth reflected light for at least one second wavelength of light emitted toward a part of the body of the user while the identified absorbance remains below the reference absorbance.

[0235] For example, the method may include an operation of obtaining the first absorbance based on the first reflected light while a first screen for guiding the user to apply the first pressure to the wearable device through a part of the body of the user is displayed on a display of an external electronic device connected to the wearable device, and an operation of obtaining the second absorbance based on the second reflected light while a second screen for guiding the user to apply the second pressure to the wearable device through a part of the body of the user is displayed on the display.

[0236] For example, the reference absorbance can be determined between the first absorbance and the second absorbance.

[0237] For example, the method may include, in response to the initiation of the measurement, providing a notification via an output device of the wearable device to guide the user to apply pressure to the wearable device via a part of the body. The output device may include at least one of a speaker, a display, or an actuator.

[0238] For example, the method may include, in response to identifying that the absorbance identified based on the third reflected light is less than the reference absorbance, providing a notification through the output device to guide the user to maintain the pressure applied to the wearable device through a part of the body.

[0239] For example, the method may include the steps of obtaining at least one absorbance for each of the at least one second wavelength of light, and measuring the biometric information based on the at least one absorbance.

[0240] For example, the bio-information may include an antioxidant level.

[0241] For example, the method may include an operation of identifying that the pressure is released after the absorbance identified based on the third reflected light is identified as being less than the reference absorbance according to the pressure applied to the wearable device through a part of the body of the user, an operation of identifying a time from the time point at which the pressure is released to the time point at which the absorbance in the normal state of the user is identified, and an operation of identifying a capillary filling time of the user based on the identified time.

[0242] For example, the method may include performing a process for resetting the reference absorbance based on identifying that account information regarding the wearable device has changed.

[0243] According to one embodiment, a non-transitory computer-readable storage medium can store one or more programs. The one or more programs, when executed by at least one processor of a wearable device having a first light-emitting circuit configured to emit light of a first wavelength, at least one second light-emitting circuit configured to emit light of at least one second wavelength, and at least one light-receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength, obtain a first absorbance based on a first reflected light for light of the first wavelength emitted toward a body part of the user while a pressure of a first intensity is applied to the wearable device through a body part of the user, obtain a second absorbance based on a second reflected light for light of the first wavelength emitted toward the body part of the user while a pressure of a second intensity different from the first intensity is applied to the wearable device through the body part of the user, determine a reference absorbance based on the first absorbance and the second absorbance, and after the reference absorbance is determined, determine biometric information of the user. The wearable device may include instructions that cause the wearable device to identify the start of a measurement, and based on the start of the measurement, identify that an absorbance identified based on a third reflected light for light of the first wavelength emitted toward the body part of the user is less than the reference absorbance, and measure the biometric information based on a fourth reflected light for light of the at least one second wavelength emitted toward the body part of the user while the absorbance identified based on the third reflected light remains less than the reference absorbance.

[0244] Electronic devices according to embodiments disclosed herein may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments disclosed herein are not limited to the aforementioned devices.

[0245] The embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "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" can include any one of the items listed together in the corresponding phrase among the phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0246] In one embodiment of this document, the term "module" used may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0247] One embodiment of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0248] According to one embodiment, the method according to one embodiment disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0249] According to one embodiment, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and arranged in other components. According to one embodiment, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to one embodiment, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In wearable devices, A first light-emitting circuit configured to emit light of a first wavelength; At least one second light emitting circuit configured to emit light of at least one second wavelength; At least one light receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength; A memory storing instructions and including one or more storage media; and At least one processor comprising a processing circuit, The above instructions, when individually and / or collectively executed by the at least one processor, While a first century pressure is applied to the wearable device through a part of the user's body, a first absorbance is obtained based on a first reflected light for light of the first wavelength emitted toward the part of the user's body, A second absorbance is obtained based on a second reflected light for light of the first wavelength emitted toward a part of the user's body while a second wavelength of pressure, distinct from the first wavelength, is applied to the wearable device through the part of the user's body, Based on the first absorbance and the second absorbance, a reference absorbance is determined, After the above reference absorbance is determined, the start of measurement of the user's biometric information is identified, Based on the above start of the above measurement, identifying that the absorbance identified based on the third reflected light for the light of the first wavelength emitted toward the body part of the user is less than the reference absorbance, Causing the wearable device to measure the biometric information based on a fourth reflected light for the at least one second wavelength of light emitted toward a part of the body of the user while the absorbance identified based on the third reflected light remains below the reference absorbance. Wearable devices.

2. In the first paragraph, the wearable device, Further including communication circuits, The above instructions, when individually and / or collectively executed by the at least one processor, While a first screen is displayed on the display of an external electronic device connected to the wearable device to guide the user to apply the first intensity of pressure to the wearable device through a part of the user's body, the first absorbance is obtained based on the first reflected light, While a second screen is displayed on the display for guiding the user to apply the second pressure to the wearable device through a part of the user's body, causing the wearable device to obtain the second absorbance based on the second reflected light. Wearable devices.

3. In the first paragraph, the reference absorbance is Determined between the first absorbance and the second absorbance, Wearable devices.

4. In the first paragraph, the wearable device, An output device comprising at least one of a speaker, a display, or an actuator, The above instructions, when individually and / or collectively executed by the at least one processor, In response to said initiation of said measurement, causing said wearable device to provide a notification through said output device to guide said user to apply pressure to said wearable device through a part of said body. Wearable devices.

5. In the fourth paragraph, when the instructions are individually and / or collectively executed by the at least one processor, In response to identifying that the absorbance identified based on the third reflected light is less than the reference absorbance, causing the wearable device to provide a notification through the output device to guide the user to maintain the pressure applied to the wearable device through a part of the body of the user. Wearable devices.

6. In paragraph 1, the instructions, when individually and / or collectively executed by the at least one processor, Obtaining at least one absorbance for each of the above at least one second wavelength of light, Causing the wearable device to measure the biometric information based on at least one absorbance. Wearable devices.

7. In the first paragraph, the biometric information is: Including antioxidant level, Wearable devices.

8. In the first paragraph, when the instructions are individually and / or collectively executed by the at least one processor, After the absorbance identified based on the third reflected light is identified as being less than the reference absorbance according to the pressure applied to the wearable device through the part of the body of the user, the pressure is released. Identify the time from the point at which the pressure is released to the point at which the absorbance in the user's normal state is identified, Causing the wearable device to identify the user's capillary filling time based on the identified time. Wearable devices.

9. In the first paragraph, the at least one second wavelength includes a third wavelength, a fourth wavelength, and a fifth wavelength, At least one second light emitting circuit, A third light-emitting circuit configured to emit light of the third wavelength; a fourth light-emitting circuit configured to emit light of the fourth wavelength, and comprising a fifth light-emitting circuit configured to emit light of the fifth wavelength; Wearable devices.

10. In the first paragraph, when the instructions are individually and / or collectively executed by the at least one processor, Causing the wearable device to perform a process for resetting the reference absorbance based on identifying that the account information regarding the wearable device has changed. Wearable devices.

11. In a method performed in a wearable device, An operation of obtaining a first absorbance based on a first reflected light for light of a first wavelength emitted toward a part of the user's body while a first pressure of a first century is applied to the wearable device through a part of the user's body; An operation of obtaining a second absorbance based on a second reflected light for light of the first wavelength emitted toward a part of the body of the user while a second wavelength of pressure, distinct from the first wavelength, is applied to the wearable device through the part of the body of the user; An operation of determining a reference absorbance based on the first absorbance and the second absorbance; An action of identifying the start of measurement of the user's biometric information after the above reference absorbance is determined; An operation of identifying that the absorbance identified based on the third reflected light for the light of the first wavelength emitted toward the body part of the user is less than the reference absorbance based on the start of the measurement; and An operation of measuring the biometric information based on a fourth reflected light for at least one second wavelength of light emitted toward a part of the body of the user while the absorbance identified based on the third reflected light remains below the reference absorbance, method.

12. In the 11th paragraph, the method, An operation of obtaining the first absorbance based on the first reflected light while a first screen is displayed on a display of an external electronic device connected to the wearable device to guide the user to apply the first intensity of pressure to the wearable device through a part of the user's body; and An operation of obtaining the second absorbance based on the second reflected light while a second screen is displayed on the display for guiding the user to apply the second pressure to the wearable device through a part of the user's body, method.

13. In the 11th paragraph, the reference absorbance is Determined between the first absorbance and the second absorbance, method.

14. In the 11th paragraph, the method, In response to the start of the measurement, the wearable device comprises an action of providing a notification through an output device of the wearable device to guide the user to apply pressure to the wearable device through a part of the body of the wearable device. The above output device is, comprising at least one of a speaker, a display, or an actuator; method.

15. In a non-transitory computer-readable storage medium storing one or more programs, the one or more programs are executed by at least one processor of a wearable device having a first light-emitting circuit configured to emit light of a first wavelength, at least one second light-emitting circuit configured to emit light of at least one second wavelength, and at least one light-receiving circuit configured to identify light of the first wavelength and light of the at least one second wavelength. While a first century pressure is applied to the wearable device through a part of the user's body, a first absorbance is obtained based on a first reflected light for light of the first wavelength emitted toward the part of the user's body, A second absorbance is obtained based on a second reflected light for light of the first wavelength emitted toward the body part of the user while a second wavelength of pressure, distinct from the first wavelength, is applied to the wearable device through the body part of the user, and Based on the first absorbance and the second absorbance, a reference absorbance is determined, After the above reference absorbance is determined, the start of measurement of the user's biometric information is identified, Based on the above start of the above measurement, identifying that the absorbance identified based on the third reflected light for the light of the first wavelength emitted toward the body part of the user is less than the reference absorbance, Instructions for causing the wearable device to measure the biometric information based on a fourth reflected light for the at least one second wavelength of light emitted toward a part of the body of the user while the absorbance identified based on the third reflected light remains below the reference absorbance. Non-transitory computer-readable storage medium.

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