Optical bio-signal sensor, electronic device and method for measuring bio-signals

Abstract

An optical bio-signal sensor, electronic device, and method for measuring bio-signals are provided. The optical bio-signal sensor comprises a light-emitting element, a plurality of light-receiving elements, and a control element for controlling the light-emitting element and the plurality of light-receiving elements. The light-emitting element is disposed in a preset central area, and the plurality of light-receiving elements are disposed at equal distances from the light-emitting element in the outer area of the central area.

Description

Optical biosignal sensor, electronic device and method for measuring biosignals

[0001] Embodiments of the present document relate to sensors, electronic devices and methods, and for example, to optical biosignal sensors, electronic devices and methods for measuring biosignals.

[0002] The types and functions of electronic devices are diversifying. For example, in addition to handheld devices with fixed displays, wearable devices that are worn on the body, folding devices with flexible displays, and / or retractable devices with rolling displays are being developed. Furthermore, electronic devices may include not only calling functions but also voice / gesture recognition, translation, and / or biosignal detection functions. Biosignal detection functions may measure blood pressure, body temperature, heart rate, sleep, and / or antioxidant information.

[0003] For example, while reactive oxygen species are important biological protective factors, such as the bactericidal action of white blood cells, excessive production of reactive oxygen species within the body can cause various tissue diseases. For example, reactive oxygen species can be generated by stress, alcohol, peroxides, and / or drugs. Excessive reactive oxygen species generated within the body can contribute to neurological disorders, circulatory disorders, cancer, digestive disorders, liver diseases, arteriosclerosis, kidney diseases, diabetes, and / or aging.

[0004] The above information may be provided solely as background information to aid in understanding the present disclosure. None of the above-described matters are claimed as prior art related to the present disclosure or can be used in determining prior art.

[0005] An optical biosignal sensor according to various embodiments of the present document may include a light-emitting element, a plurality of light-receiving elements, a light-emitting element, and a control element for controlling the plurality of light-receiving elements. The light-emitting element may be arranged in a preset central region, and the plurality of light-receiving elements may be arranged at an equidistant distance from the light-emitting element in an area outside the central region.

[0006] An electronic device according to various embodiments of the present document may include an optical biosignal sensor, at least one processor, and a memory storing instructions executed by the at least one processor. The optical biosignal sensor may include a light-emitting element, a plurality of light-receiving elements, a light-emitting element, and a control element controlling the plurality of light-receiving elements. The light-emitting element may be arranged in a preset central region, and the plurality of light-receiving elements may be arranged at an equidistant distance from the light-emitting element in an outer region of the central region.

[0007] A method for measuring a biological signal in an electronic device including a plurality of light-emitting elements and a plurality of light-receiving elements according to various embodiments of the present document may include an operation of sequentially turning on a plurality of light-emitting elements arranged in a central region equidistant from at least one of the plurality of light-receiving elements based on a wavelength. The method may include an operation of activating a plurality of light-receiving elements arranged in an outer region of the central region, which are arranged at the same distance from the light-emitting element being turned on, and deactivating at least one remaining light-receiving element.

[0008] A non-transitory computer-readable storage medium having recorded thereon a program for performing a method of measuring a biosignal in an electronic device including a plurality of light-emitting elements and a plurality of light-receiving elements according to various embodiments of the present document may include an operation of sequentially turning on a plurality of light-emitting elements arranged in a central region equidistant from at least one of the plurality of light-receiving elements based on a wavelength. The storage medium may include an operation of activating a plurality of light-receiving elements arranged in an outer region of the central region, which are arranged at the same distance from the light-emitting element to be turned on, and deactivating at least one remaining light-receiving element.

[0009] In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

[0010] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0011] FIG. 2 is a front perspective view of an electronic device according to various embodiments.

[0012] FIG. 3 is a rear perspective view of the electronic device of FIG. 2, according to various embodiments.

[0013] FIG. 4 is an exploded perspective view of the electronic device of FIG. 2, according to various embodiments.

[0014] FIG. 5A is a front view of the electronic device of FIG. 2 according to various embodiments.

[0015] FIG. 5b is a rear view of the electronic device of FIG. 2 according to various embodiments.

[0016] FIG. 5c is a rear perspective view of the electronic device of FIG. 2 according to various embodiments.

[0017] FIGS. 6A and 6B are exploded perspective views of an optical biosignal sensor according to various embodiments.

[0018] FIG. 7 is a block diagram illustrating the configuration of an electronic device according to various embodiments.

[0019] FIGS. 8A, 8B, 8C, 8D, 8E, 8F, 8G, and 8H are drawings illustrating the arrangement structure of light-emitting elements and / or light-receiving elements of an optical biosignal sensor according to various embodiments.

[0020] FIGS. 9A and 9B are diagrams illustrating an optical path between a light-emitting element and a light-receiving element according to various embodiments.

[0021] Fig. 10 is a drawing explaining the distance deviation according to the arrangement of the light receiving element according to various embodiments.

[0022] Figure 11 is a diagram illustrating antioxidant levels according to various embodiments.

[0023] FIG. 12 is a flowchart illustrating a method of measuring a biosignal according to various embodiments.

[0024] 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.

[0025] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the 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)).

[0026] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result 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.

[0027] The auxiliary processor (123) may control at least a portion 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.

[0028] The memory (130) can store various data used by at least one component (e.g., the processor (120) or the sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., the program (140)) and input data or output data for commands related thereto. The memory (130) can include a volatile memory (132) or a non-volatile memory (134). The non-volatile memory (134) can include at least one internal memory (136) and an external memory (138).

[0029] 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).

[0030] 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).

[0031] 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. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0032] 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. In 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.

[0033] 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).

[0034] 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.

[0035] 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.

[0036] 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).

[0037] 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. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0038] 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.

[0039] 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, for example, as at least a part of a power management integrated circuit (PMIC).

[0040] 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.

[0041] 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).

[0042] 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) can 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.

[0043] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In 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). In 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 by, for example, 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. In 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).

[0044] 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.

[0045] 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)).

[0046] 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 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 one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or 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.

[0047] Electronic devices according to the various embodiments disclosed in this document 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 the embodiments of this document are not limited to the aforementioned devices.

[0048] FIG. 2 is a front perspective view of an electronic device according to various embodiments, and FIG. 3 is a rear perspective view of the electronic device of FIG. 2 according to various embodiments.

[0049] Referring to FIGS. 2 and 3, an electronic device (200) according to one embodiment 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 detachably fasten the electronic device (200) to a body part (e.g., wrist, ankle) of a user. In another embodiment (not shown), the housing (210) may also refer to a structure forming a portion of the first side (210A), the second side (210B), and the side surface (210C) of FIG. 2. 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”) (211) 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 (211) may be formed integrally and comprise the same material (e.g., a metal material such as aluminum). The above-mentioned fastening members (250, 260) may be formed of various materials and shapes. For example, the fastening members (250, 260) may be formed of a woven material, leather, rubber, urethane, metal, ceramic, or a combination of at least two of the above-mentioned materials, such that integral and multiple unit links can flow with each other.

[0050] According to one embodiment, the electronic device (200) may include at least one of a display (220, see FIG. 4), an audio module (205, 208), a sensor module, an 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 input device (202, 203, 204) or the connector hole (209)) or may additionally include other components.

[0051] 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 coupled to or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch.

[0052] 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 (e.g., a piezo speaker) may be included without the speaker hole (208).

[0053] The sensor module can generate an electrical signal or data value corresponding to an internal operating state of the electronic device (200) or an external environmental state. The sensor module can include a biometric sensor module (e.g., a fingerprint sensor and / or an HRM sensor). 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.

[0054] The 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 (202) 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 input devices (202, 203, 204), and the 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 (209).

[0055] 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).

[0056] 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., wrist, 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 motion 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 motion of the fastening members (250, 260) when the fastening member (252) and the fastening member fastening hole (253) are fastened.

[0057] FIG. 4 is an exploded perspective view of the electronic device of FIG. 2, according to various embodiments.

[0058] Referring to FIG. 4, an electronic device (400) (e.g., the electronic device (200) of FIGS. 2 and 3) may include a housing (410) (e.g., the housing (210) of FIG. 2), a wheel key (420), a front plate (201), a display (220), a first antenna (450), an optical biosignal sensor (455), a support member (460) (e.g., a bracket), a battery (470), a printed circuit board (PCB) (480), a sealing member (490), a rear plate (493), and fastening members (495, 497). The electronic device (400) may include a flexible printed circuit board (FPCB).

[0059] At least one of the components of the electronic device (400) may be identical or similar to at least one of the components of the electronic device (200) of FIG. 2 or FIG. 3, and a duplicate description thereof will be omitted below. In one embodiment, the housing (410) may include a side bezel structure (e.g., the side bezel structure (211) of FIG. 2). The support member (460) may be disposed inside the electronic device (400) and connected to the housing (410), or may be formed integrally with the housing (410). The support member (460) may be formed of, for example, a metallic material and / or a non-metallic (e.g., a polymer) material. The support member (460) may have a display (220) coupled to one surface and a printed circuit board (480) coupled to the other surface. A printed circuit board (480) may be equipped with a processor (e.g., a processor (120) of FIG. 1), a memory (e.g., a memory (130) of FIG. 1), and / or an interface (e.g., an interface (177) of FIG. 1). A flexible printed circuit board may be connected to one surface of the printed circuit board (480). The flexible printed circuit board may be equipped with at least one sensor (e.g., a sensor module (176) of FIG. 1) (e.g., a biometric sensor and / or an illuminance sensor) and / or a light source.

[0060] The battery (470) is a device for supplying power to at least one component of the electronic device (400), 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 (470) may be disposed substantially on the same plane as, for example, the printed circuit board (480). The battery (470) may be disposed integrally within the electronic device (400), or may be disposed detachably from the electronic device (400).

[0061] The first antenna (450) may be positioned between the display (220) and the support member (460). The first antenna (450) 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 (450) may, for example, perform short-range communication with an external electronic 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 housing (410) and / or the support member (460).

[0062] The optical biosignal sensor (455) may be placed between the printed circuit board (480) and the back plate (493).

[0063] A sealing member (490) may be positioned between the housing (410) and the rear plate (493). The sealing member (490) may be configured to block moisture and foreign substances from entering the space surrounded by the housing (410) and the rear plate (493) from the outside.

[0064] FIG. 5A is a front view of the electronic device of FIG. 2 according to various embodiments, FIG. 5B is a rear view of the electronic device of FIG. 2 according to various embodiments, and FIG. 5C is a rear perspective view of the electronic device of FIG. 2 according to various embodiments.

[0065] Referring to FIGS. 5A, 5B, and 5C, the electronic device (500) may include a display (510), an input device (511, 512, 513, 514), a temperature sensor (350), and an optical biosignal sensor (310).

[0066] For example, the display (510) may be positioned on the front of an electronic device (500) (e.g., the electronic device (101) of FIG. 1, the electronic device (200) of FIG. 2) and may be visually exposed. The display (510) may be coupled to or disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch.

[0067] For example, input devices (511, 512, 513, 514) (e.g., input devices (202, 203, 204) of FIG. 2) can receive information from a user. As an example, input devices (511, 512, 513, 514) can be implemented as electrode sensors (e.g., sensor module (176) of FIG. 1). As an example, a first electrode sensor (511) and a second electrode sensor (512) can be disposed on one side of an electronic device (500), and a third electrode sensor (513) and a fourth electrode sensor (514) can be disposed on the back of the electronic device (500). When a plurality of electrode sensors are in contact with a user's body, and the plurality of electrode sensors and the user's body form a closed-loop circuit, the plurality of electrode sensors can receive biometric information of the user. As an example, a first electrode sensor (511) and a second electrode sensor (512) disposed on one side of an electronic device (500) can be implemented as electrode sensors. The second electrode sensor (512) can form a closed loop circuit by intentional contact of the user.

[0068] For example, a temperature sensor (350) (e.g., sensor module (176) of FIG. 1) and an optical biosignal sensor (310) (e.g., sensor module (176) of FIG. 1) may be disposed on the rear of the electronic device (500). For example, the temperature sensor (350) may receive body temperature information of the user. The optical biosignal sensor (310) may receive absorbance information of the user to measure the concentration of an antioxidant in the body. Since the optical biosignal sensor (310) is for detecting a biomarker (e.g., an antioxidant), it may be disposed on a central region of the rear of the electronic device (500) that may come into contact with the user's body. As an example, the rear of the electronic device (500) may have a convex shape at the center. The optical biosignal sensor (310) is placed in the central area of ​​the rear surface of the electronic device (500), and since the rear surface of the electronic device (500) has a convex shape in the center, the optical biosignal sensor (310) can come into contact with the user's body by wearing the electronic device (500).

[0069] As an example, the third electrode sensor (513) and the fourth electrode sensor (514) positioned on the rear of the electronic device (500) are positioned in an area adjacent to the optical biosignal sensor (310), so that the third electrode sensor (513) and the fourth electrode sensor can also come into contact with the user by wearing the electronic device (500).

[0070] FIGS. 6A and 6B are exploded perspective views of an optical biosignal sensor according to various embodiments.

[0071] FIG. 6a is an exploded perspective view (e.g., top view) of the optical biosignal sensor (310) as viewed from the outside, and FIG. 6b is an exploded perspective view (e.g., bottom view) of the optical biosignal sensor (310) as viewed from the inside.

[0072] Referring to FIGS. 6A and 6B, the optical biosignal sensor (310) may include a back glass (601), an RX coil (603), a magnet tape (604), and a PCB (621).

[0073] As an example, the rear glass (601) may be exposed to the outside and may transmit and / or block light and protect internal circuits. As an example, an optical film (605) may be disposed on the inside of the rear glass (601) to block light incident from the outside. As an example, an RX coil (603) may be disposed under the rear glass (610). The rear glass (610) and the RX coil (603) may be adhered with a double-sided tape (602). The RX coil (603) may wirelessly charge the optical biosignal sensor (310). As an example, a magnet tape (604) may be disposed under the RX coil (603). The magnet tape (604) may block light incident from the outside and align the RX coil (603) and the PCB (621) for wireless charging.

[0074] As an example, a PCB (621) may be placed under the magnet tape (604). One surface of the PCB (621) may include a solder plate (617). Light-emitting elements (612, 614, 616), light-receiving elements (611, 619), a temperature measurement sensor (613), a top magnet (615), and a barrier (618) may be placed on the solder plate (617). As an example, the light-emitting elements (612, 614, 616) may include a red LED (light emitting diode), a green LED, a blue LED, an ultraviolet (UVA) LED, and / or an infrared (IR) LED. The light-emitting elements (612, 614, 616) may be placed in a central area of ​​the optical biosignal sensor (310) or a central area of ​​the PCB (621). The light-emitting elements (612, 614, 616) may be arranged in the center of the central region and / or on a concentric circle of the central region. The light-receiving elements (611, 619) may include a photo diode (PD). The light-receiving elements (611, 619) may be arranged in an outer region of the region where the light-emitting elements (612, 614, 616) are arranged. The light-receiving elements (611, 619) may be arranged on a concentric circle of the outer region. As an example, the temperature measurement sensor (613) may measure the temperature of the optical bio-signal sensor (310) and may include a thermistor. The top magnet (615) may align the RX coil (603) and the PCB (621) for wireless charging. The barrier (618) may block light emitted from adjacent light-emitting elements (612, 614, 616).

[0075] As an example, various components may be arranged on the other side of the PCB (621). For example, the various components may include a component (622) for biosignal processing (e.g., AFE4510), a component (624) for electromagnetic wave shielding (e.g., SPCC (steel plate hot commercial)), a connector (626) for board-to-board connection, a bottom magnet (625) for aligning the RX coil (603) and the PCB (621) for wireless charging, and / or a basic component (623) (e.g., a resistor, a capacitor, an inductor, a memory, a power supply).

[0076] FIG. 7 is a block diagram illustrating the configuration of an electronic device according to various embodiments.

[0077] Referring to FIG. 7, the electronic device (300) may include an optical biosignal sensor (310), a memory (320), and a processor (330).

[0078] An optical biosignal sensor (310) (e.g., sensor module (176) of FIG. 1) may include a light-emitting element (311) (or a light source), a light-receiving element (313) (or a detection unit), and a control element (135). As an example, the light-emitting element (311) may include an LED, and the light-receiving element (313) may include a photo diode (PD). The optical biosignal sensor (310) may include one or more light-emitting elements (311) and / or one or more light-receiving elements (313). For example, the optical biosignal sensor (310) may be disposed on the rear surface (210B) of an electronic device (300) (e.g., the electronic device (101) of FIG. 1 or the electronic device (200) of FIG. 2).

[0079] The control element (315) can control the on / off of the light emitting element (311) and / or the light receiving element (315). For example, the control element (135) can include an analog front end (AFE) and can be connected to other sensors included in the electronic device (300).

[0080] As an example, the light emitting element (311) may be placed in a preset central region of the rear surface (210B). The preset central region may be a central region of the entire region where the optical biosignal sensor (310) is placed. If the optical biosignal sensor (310) includes one light emitting element (311), the light emitting element (311) may be placed at a central point of the preset central region. If the optical biosignal sensor (310) includes a plurality of light emitting elements (311), the light emitting elements (311) may be placed on concentric circles of the central region. As an example, all of the plurality of light emitting elements (311) may be placed on one concentric circle based on the number and / or size of the light emitting elements (311). As an example, the plurality of light emitting elements (311) may be divided and placed on a plurality of concentric circles. Each of the plurality of light emitting elements (311) may output light of a unique wavelength. Among the plurality of light-emitting elements (311), light-emitting elements (311) that output light of substantially the same wavelength may be arranged on the same concentric circle. Among the plurality of light-emitting elements (311), the light-emitting element with the largest size or the light-emitting element with the shortest wavelength may be arranged at the center of the central region. The plurality of light-emitting elements (311) may be arranged equidistant from at least one light-receiving element (313). As an example, one light-receiving element (313) may be arranged in the form of an isosceles triangle with two light-emitting elements (311).

[0081] For example, a plurality of light-receiving elements (313) may be arranged in an outer region of the central region. The plurality of light-receiving elements (313) may be arranged equidistantly from at least one light-emitting element (311). As an example, one light-emitting element (311) may be arranged in the form of an isosceles triangle with two light-receiving elements (313). The plurality of light-receiving elements (313) may be arranged on at least one concentric circle. The plurality of light-receiving elements (313) may be arranged so as to form a preset substantially equal angle with the center of the central region and an adjacent light-receiving element (313). The plurality of light-receiving elements (313) may be arranged based on their shape and / or size. For example, among the plurality of light-receiving elements (313), a plurality of light-receiving elements (313) having substantially the same shape and / or size may be arranged symmetrically with respect to a center point of the central region.

[0082] The optical biosignal sensor (310) may place a light-emitting element (311) in the central region to measure a biosignal, and may place a light-receiving element (313) around the light-emitting element (311). For example, a photoplethysmography (PPG) signal may be measured by removing a direct current (DC) component and increasing the SNR of an alternating current (AC) component. The optical biosignal sensor (310) related to this document removes the DC component and measures a biosignal using the AC component, so the light-emitting element (311) and the light-receiving element (313) may be placed without considering the optical path length of the DC component. If the light-emitting element (311) and the light-receiving element (313) of the optical biosignal sensor (310) are placed without considering the optical path length of the DC component, the length of the optical path may differ depending on the wavelength, making it difficult to uniformly measure the absorbance for measuring a component in the skin.

[0083] In order to make the optical path constant in order to measure the amount of light absorbed in the skin, it may be necessary to make the distance between the light-emitting element (311) and the light-receiving element (313) constant. However, if the optical biosignal sensor (310) includes a plurality of light-emitting elements (311), the plurality of light-emitting elements (311) cannot be arranged in the same space, so they may be arranged in a concentric circle close to the center. If the plurality of light-emitting elements (311) are arranged in a concentric shape, the straight-line average distance between the light-emitting element (311) and the light-receiving element (313) may be constant, but since the actual optical path is not a straight line but passes through the tissue in a crescent shape, the straight-line distance of the optical path must be considered to be uniform in order to measure the absorbance (DC component).

[0084] The optical biosignal sensor (310) and the electronic device (300) of this document can substantially match not only the average distance between the light-emitting element (311) and the light-receiving element (313) but also the optical path that varies depending on the wavelength by equidistantly arranging at least one light-emitting element (311) among a plurality of light-emitting elements (311) and at least one light-receiving element (313) among a plurality of light-receiving elements (313). The optical biosignal sensor (310) and the electronic device (300) of this document can reduce device-to-device deviation and device-to-device performance deviation due to deviation between the light-emitting elements (311) and the light-receiving elements (313).

[0085] The effects of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of this document.

[0086] The memory (320) (e.g., the memory (130) of FIG. 1) can store data, algorithms, programs, and instructions that perform functions of the electronic device (300). Instructions stored in the memory (320) can be loaded into the processor (330) and executed by the processor (330).

[0087] A processor (330) (e.g., processor (120) of FIG. 1) can control each component of the electronic device (300). The electronic device (300) can include one or more processors (330). For example, the processor (330) can correspond to multiple processors that collectively perform multiple functions by dividing them among the processors.

[0088] For example, the processor (330) can sequentially turn on a plurality of light-emitting elements (311) based on wavelength through the control element (315). The processor (330) can activate a plurality of light-receiving elements (313) positioned at substantially the same distance from the light-emitting elements (311) turned on through the control element (315), and deactivate the remaining light-receiving elements (313).

[0089] FIGS. 8A, 8B, 8C, 8D, 8E, 8F, 8G, and 8H are drawings illustrating the arrangement structure of light-emitting elements and / or light-receiving elements of an optical biosignal sensor according to various embodiments.

[0090] Referring to FIG. 8A, as an example, an optical biosignal sensor (310) including five light-emitting elements (11, 12, 13, 14, 15) and four light-receiving elements (61, 62, 63, 64) is illustrated. For example, the optical biosignal sensor (310) and the electronic device (300) of the present document can estimate the concentration of carotenoids by irradiating light to the skin and measuring the absorption spectrum from at least a portion of the reflected light. Since antioxidants such as carotenoids are unevenly distributed on the skin, the light-emitting elements (311) may be arranged in a central region of the optical biosignal sensor (310) and the light-receiving elements (313) may be arranged on a concentric circle so that the concentration of antioxidants can be measured on average in a certain area. For example, a plurality of light-emitting elements (11, 12, 13, 14, 15) can form a light source cluster in a central region of an optical biosignal sensor (310). A plurality of light-receiving elements (61, 62, 63, 64) can be arranged symmetrically with respect to the light source cluster so that an average distance between the light-emitting elements (11, 12, 13, 14, 15) and the light-receiving elements (61, 62, 63, 64) can be uniform. For example, among the plurality of light-receiving elements (61, 62, 63, 64), a plurality of light-receiving elements having substantially the same shape and / or size can be arranged symmetrically with respect to the center (1) of the central region. For example, a plurality of light-emitting elements (11, 12, 13, 14, 15) and light-receiving elements (61, 62, 63, 64) are arranged in an isosceles triangle shape, so that the average distance and the average optical path between the light-emitting elements (11, 12, 13, 14, 15) and the light-receiving elements (61, 62, 63, 64) can be substantially matched depending on the wavelength. As an example, the wavelength of the light-emitting elements (11, 12, 13, 14, 15) can be about 400 nm to about 600 nm. The distance between the light-emitting elements (11, 12, 13, 14, 15) and the light-receiving elements (61, 62, 63, 64) can be about 3 mm to about 6 mm.

[0091] As an example, the wavelength of the first light-emitting element (11) may be about 525 nm, the wavelength of the second light-emitting element (12) may be about 405 nm, the wavelength of the third light-emitting element (13) may be about 575 nm, the wavelength of the fourth light-emitting element (14) may be about 430 nm, and the wavelength of the fifth light-emitting element (15) may be about 470 nm. The first light-emitting element (11), the second light-emitting element (12), the third light-emitting element (13), the fourth light-emitting element (14), and the fifth light-emitting element (15) may be arranged in a central region of the optical biosignal sensor (310) to form a light source cluster. As an example, the first light-emitting element (11) having the largest size may be arranged in the center (1) of the central region. As an example, the second light-emitting element (12) having the shortest wavelength may be arranged in the center (1) of the central region. As illustrated in Fig. 8a, when the first light-emitting element (11) is arranged at the center (1) of the central region, the second light-emitting element (12), the third light-emitting element (13), the fourth light-emitting element (14), and the fifth light-emitting element (15) can be arranged on concentric circles in the central region. The light-emitting elements (12, 13, 14, 15) arranged on the concentric circles can be arranged to form substantially the same angle with respect to the center (1). As an example, since four light-emitting elements (12, 13, 14, 15) are arranged on the concentric circles, the angle formed by the second light-emitting element (12) and the third light-emitting element (13) with respect to the center (1) can be approximately 90 degrees. The angle formed by the third light-emitting element (13) and the fourth light-emitting element (14) with respect to the center (1), the angle formed by the fourth light-emitting element (14) and the fifth light-emitting element (15) with respect to the center (1), and the angle formed by the fifth light-emitting element (15) and the second light-emitting element (12) with respect to the center (1) can all be approximately 90 degrees.

[0092] A plurality of light-receiving elements (61, 62, 63, 64) may be arranged in an outer region of the central region. The plurality of light-receiving elements (61, 62, 63, 64) may be arranged so as to form substantially the same angle with adjacent light-receiving elements on a concentric circle in the outer region. As an example, the first light-receiving element (61), the second light-receiving element (62), the third light-receiving element (63), and the fourth light-receiving element (64) may be arranged concentrically in the outer region. Since four light-receiving elements (61, 62, 63, 64) are arranged on a concentric circle, the angle formed by the first light-receiving element (61) and the second light-receiving element (62) with respect to the center (1) may be approximately 90 degrees. The angle formed by the second light-receiving element (62) and the third light-receiving element (63) with respect to the center (1), the angle formed by the third light-receiving element (63) and the fourth light-receiving element (64) with respect to the center (1), and the angle formed by the fourth light-receiving element (64) and the first light-emitting element (61) with respect to the center (1) can all be approximately 90 degrees.

[0093] A plurality of light-emitting elements (11, 12, 13, 14, 15) may be arranged equidistantly from at least two light-receiving elements (61, 62, 63, 64), and a plurality of light-receiving elements (61, 62, 63, 64) may be arranged equidistantly from at least two light-emitting elements (11, 12, 13, 14, 15).

[0094] As an example, the first light-emitting element (11) can form substantially the same distance as the first light-receiving element (61), the second light-receiving element (62), the third light-receiving element (63), and the fourth light-receiving element (64). The second light-emitting element (12) can form substantially the same first distance as the first light-receiving element (61) and the second light-receiving element (62), and can form substantially the same second distance as the third light-receiving element (63) and the fourth light-receiving element (64). The third light-emitting element (13) can form substantially the same third distance as the second light-receiving element (62) and the third light-receiving element (63), and can form substantially the same fourth distance as the fourth light-receiving element (64) and the first light-receiving element (61). The fourth light-emitting element (64) can form a fifth distance substantially the same as the third light-receiving element (63) and the fourth light-receiving element (64), and can form a sixth distance substantially the same as the first light-receiving element (61) and the second light-receiving element (62). The fifth light-emitting element (15) can form a seventh distance substantially the same as the fourth light-receiving element (64) and the first light-receiving element (61), and can form an eighth distance substantially the same as the second light-receiving element (62) and the third light-receiving element (63).

[0095] As an example, the first light-receiving element (61) can form substantially the same distance from the second light-emitting element (12) and the fifth light-emitting element (15). The first light-receiving element (61), the second light-emitting element (12), and the fifth light-emitting element (15) can be arranged in the form of an isosceles triangle. The second light-receiving element (62) can form substantially the same distance from the second light-emitting element (120) and the third light-emitting element (13). The second light-receiving element (62) can be arranged in the form of an isosceles triangle with the second light-emitting element (120) and the third light-emitting element (13). The third light-receiving element (63) can be arranged in the form of an isosceles triangle with the third light-emitting element (13) and the fourth light-emitting element (14). The third light-receiving element (63) can be arranged in the form of an isosceles triangle with the third light-emitting element (13) and the fourth light-emitting element (14). The fourth light-receiving element (64) can form a substantially equal distance from the fourth light-emitting element (14) and the fifth light-emitting element (15). The fourth light-receiving element (64) and the fourth light-emitting element (14) and the fifth light-emitting element (15) can be arranged in an isosceles triangle shape.

[0096] As illustrated in Fig. 8a, when each light-emitting element (12, 13, 14, 15) and each light-receiving element (61, 62, 63, 64) arranged on a concentric circle are arranged to form an isosceles triangle, the distance and optical path from each light-emitting element (12, 13, 14, 15) to each light-receiving element (61, 62, 63, 64) can always be formed as a constant distance pair. Due to the constant distance pair and the constant optical path distance pair, the average optical path distance of the signal received from the plurality of light-receiving elements (61, 62, 63, 64) can be made substantially constant.

[0097] Referring to FIGS. 8b and 8c, a plurality of light-receiving elements are illustrated that collect reflected light from light emitted from one light-emitting element.

[0098] Referring to FIG. 8B, a seventeenth light-emitting element (17) may be arranged on a concentric circle in a central region, and a sixty-sixth light-receiving element (66), a sixty-seventh light-receiving element (67), a sixty-eighth light-receiving element (68), and a sixty-ninth light-receiving element (69) may be arranged on concentric circles in an outer region. The seventeenth light-emitting element (17) may be arranged in the form of an isosceles triangle including two sides of a distance substantially the same as the eleventh distance of the sixty-sixth light-receiving element (66) and the sixty-seventh light-receiving element (67), and may be arranged in the form of an isosceles triangle including two sides of a distance substantially the same as the twelfth distance of the sixty-eighth light-receiving element (68) and the sixty-ninth light-receiving element (69). The plurality of light-emitting elements (17, 19) may be sequentially turned on according to wavelength. As an example, signals irradiated from the plurality of light-emitting elements (17, 19) may be sampled at about 25 times per second (25 Hz). When the 17th light-emitting element (17) is turned on, the 66th light-receiving element (66) and the 67th light-receiving element (67) which are spaced apart by the same 11th distance are activated, and the 68th light-receiving element (68) and the 69th light-receiving element (69) can be deactivated (or maintained in a deactivated state). The activated 66th light-receiving element (66) and the 67th light-receiving element (67) can receive the reflected light irradiated from the 17th light-emitting element (17) and transmitted through the skin. Sequentially, the 17th light-emitting element (17) is maintained in a turned-on state, the 68th light-receiving element (68) and the 69th light-receiving element (69) which are spaced apart by the same 12th distance are activated, and the 66th light-receiving element (66) and the 67th light-receiving element (67) can be deactivated. The activated 68th light-receiving element (68) and the 69th light-receiving element (69) can receive reflected light that is irradiated from the 17th light-emitting element (17) and passes through the skin.

[0099] The electronic device (300) can distinguish and process the signals received from the 66th light-receiving element (66) and the 67th light-receiving element (67) and the signals received from the 68th light-receiving element (68) and the 69th light-receiving element (69), calculate an average, and measure the concentration of the antioxidant based on the absorbance. As an example, the electronic device (300) can measure the concentration of the antioxidant by adding up all the signals received from the 66th light-receiving element (66), the 67th light-receiving element (67), the 68th light-receiving element (68), and the 69th light-receiving element (69), and calculating an average.

[0100] Referring to FIG. 8C, the 19th light-emitting element (19) may be arranged on a concentric circle in the central region, and the 66th light-receiving element (66), the 67th light-receiving element (67), the 68th light-receiving element (68), and the 69th light-receiving element (69) may be arranged on a concentric circle in the outer region. The 19th light-emitting element (19) may be arranged in the form of an isosceles triangle including two sides of a 13th distance substantially the same as those of the 66th light-receiving element (66) and the 69th light-receiving element (69), and may be arranged in the form of an isosceles triangle including two sides of a 14th distance substantially the same as those of the 67th light-receiving element (67) and the 68th light-receiving element (68). When the 19th light-emitting element (19) is turned on, the 66th light-receiving element (66) and the 69th light-receiving element (69) which are spaced apart by substantially the same 13th distance are activated, and the 67th light-receiving element (67) and the 68th light-receiving element (68) can be deactivated. The activated 66th light-receiving element (66) and the 69th light-receiving element (69) can receive the reflected light irradiated from the 19th light-emitting element (19) and transmitted through the skin. Sequentially, the 19th light-emitting element (19) maintains a turned-on state, the 67th light-receiving element (67) and the 68th light-receiving element (68) which are spaced apart by the same 14th distance are activated, and the 66th light-receiving element (66) and the 69th light-receiving element (69) can be deactivated. The activated 67th light-receiving element (67) and the 68th light-receiving element (68) can receive reflected light that is irradiated from the 19th light-emitting element (19) and passes through the skin.

[0101] The electronic device (300) can distinguish and process the signals received from the 66th light-receiving element (66) and the 69th light-receiving element (69) and the signals received from the 67th light-receiving element (67) and the 68th light-receiving element (68), calculate an average, and measure the concentration of the antioxidant based on the absorbance. As an example, the electronic device (300) can measure the concentration of the antioxidant based on the absorbance by adding up all the signals received from the 66th light-receiving element (66), the 67th light-receiving element (67), the 68th light-receiving element (68), and the 69th light-receiving element (69), and calculate an average.

[0102] The light-emitting element located at the center can be spaced apart from the 66th light-receiving element (66), the 67th light-receiving element (67), the 68th light-receiving element (68), and the 69th light-receiving element (69) by substantially the same distance. When the light-emitting element located at the center is turned on, the 66th light-receiving element (66), the 67th light-receiving element (67), the 68th light-receiving element (68), and the 69th light-receiving element (69) are activated, and the reflected light irradiated from the light-emitting element located at the center and transmitted through the skin can be received.

[0103] Referring to FIG. 8D, an optical biosignal sensor (310) including seven light-emitting elements (21, 22, 23, 24, 25, 26, 27) and six light-receiving elements (71, 72, 73, 74, 75, 76) is illustrated. For example, one light-emitting element may be disposed at the center of a central region, and six light-emitting elements (21, 22, 23, 24, 25, 26) may be disposed on concentric circles in the central region. Six light-receiving elements (71, 72, 73, 74, 75, 76) may be disposed on concentric circles in an outer region. The six light-emitting elements (21, 22, 23, 24, 25, 26) disposed on concentric circles in the central region may be disposed at substantially the same angle (or, the same interval). The six light-receiving elements (71, 72, 73, 74, 75, 76) arranged concentrically in the outer region may also be arranged at substantially the same angle (or at the same interval).

[0104] As an example, the 21st light-emitting element (21) may be spaced apart from the 71st light-receiving element (71) and the 72nd light-receiving element (72) by a substantially 21st distance. The 21st light-emitting element (21) may be arranged in the form of an isosceles triangle having two sides that are the 21st distance from the 71st light-receiving element (71) and the 72nd light-receiving element (72). The 21st light-emitting element (21) may be spaced apart from the 73rd light-receiving element (73) and the 76th light-receiving element (76) by a substantially 22nd distance. The 21st light-emitting element (21) may be arranged in the form of an isosceles triangle having two sides that are the 22nd distance from the 73rd light-receiving element (73) and the 76th light-receiving element (76). The 21st light-emitting element (21) may be spaced apart from the 74th light-receiving element (74) and the 75th light-receiving element (75) by a distance of 23, which is substantially the same. The 21st light-emitting element (21) may be arranged in the shape of an isosceles triangle including two sides that are at a distance of 23 from the 74th light-receiving element (74) and the 75th light-receiving element (75).

[0105] As an example, the 71st light-receiving element (71) may be spaced equidistantly from the 21st light-emitting element (21) and the 26th light-emitting element (26) and arranged in the form of an isosceles triangle. The 72nd light-receiving element (72) may be spaced equidistantly from the 21st light-emitting element (21) and the 22nd light-emitting element (22) and arranged in the form of an isosceles triangle. The 73rd light-receiving element (73) may be spaced equidistantly from the 22nd light-emitting element (22) and the 23rd light-emitting element (23) and arranged in the form of an isosceles triangle. The 74th light-receiving element (74), the 75th light-receiving element (75), and the 76th light-receiving element (76) may similarly be spaced equidistantly from two adjacent light-emitting elements and arranged in the form of an isosceles triangle.

[0106] The electronic device (300) can sequentially turn on a plurality of light-emitting elements (21, 22, 23, 24, 25, 26) according to wavelength, activate a light-receiving element positioned at the same distance as the light-emitting element being turned on, and deactivate the remaining light-receiving elements. For example, when the 21st light-emitting element (21) is turned on, the 71st light-receiving element (71) and the 72nd light-receiving element (72) spaced apart from the 21st light-emitting element (21) by the 21st distance can be turned on, and the remaining light-receiving elements (73, 74, 75, 76) can be turned off. When the 21st light-emitting element (21) is turned on, the 73rd light-receiving element (73) and the 76th light-receiving element (76) spaced apart from each other by a 22nd distance are turned on, and the remaining light-receiving elements (71, 72, 74, 75) can be turned off (or maintained in a turned-off state). When the 21st light-emitting element (21) is turned on, the 74th light-receiving element (74) and the 75th light-receiving element (75) spaced apart from each other by a 23rd distance are turned on, and the remaining light-receiving elements (71, 72, 73, 76) can be turned off (or maintained in a turned-off state).

[0107] Referring to FIG. 8E, an optical biosignal sensor (310) including nine light-emitting elements and eight light-receiving elements is illustrated. For example, one light-emitting element may be disposed at the center of a central region, and eight light-emitting elements may be disposed on concentric circles in the central region. Eight light-receiving elements may be disposed on concentric circles in an outer region. The eight light-emitting elements disposed on concentric circles in the central region may be disposed at substantially the same angles (or, equal intervals). The eight light-receiving elements disposed on concentric circles in the outer region may also be disposed at substantially the same angles (or, equal intervals).

[0108] As an example, the 28th light-emitting element (28) may be equidistant from the 78th light-receiving element (78) and the 80th light-receiving element (80) and arranged in the form of an isosceles triangle. The 29th light-emitting element (29) may be equidistant from the 79th light-receiving element (79) and the 81st light-receiving element (81) and arranged in the form of an isosceles triangle. The 30th light-emitting element (30) may be equidistant from the 80th light-receiving element (80) and the 82nd light-receiving element (82) and arranged in the form of an isosceles triangle. The remaining light-emitting elements positioned on a concentric circle may similarly be equidistant from the two light-receiving elements and arranged in the form of an isosceles triangle. The 31st light-emitting element (31) may be arranged in the center of the central region. As an example, the 31st light-emitting element (31) may be the light-emitting element with the largest size or the light-emitting element with the shortest wavelength. The 31st light-emitting element (31) is located at the center of the central area and can be equidistant from all light-receiving elements located on a concentric circle.

[0109] As an example, the 80th light-receiving element (80) may be spaced equidistantly from the 28th light-emitting element (28) and the 30th light-emitting element (30) and arranged in an isosceles triangle shape. The remaining light-receiving elements positioned on a concentric circle may similarly be spaced equidistantly from the two light-emitting elements and arranged in an isosceles triangle shape.

[0110] Referring to FIG. 8F, an optical biosignal sensor (310) including nine light-emitting elements and four light-receiving elements is illustrated. For example, one light-emitting element may be disposed at the center of a central region, and eight light-emitting elements may be disposed on concentric circles in the central region. Four light-receiving elements may be disposed on concentric circles in an outer region. The eight light-emitting elements disposed on concentric circles in the central region may be disposed at substantially the same angles (or, equal intervals). The four light-receiving elements disposed on concentric circles in the outer region may also be disposed at substantially the same angles (or, equal intervals).

[0111] As an example, the 33rd light-emitting element (33) may be equidistant from the 84th light-receiving element (84) and the 85th light-receiving element (85) and may be arranged in the form of an isosceles triangle. The 34th light-emitting element (34) may be equidistant from the 85th light-receiving element (85) and the 86th light-receiving element (86) and may be arranged in the form of an isosceles triangle. The 35th light-emitting element (35) may be equidistant from the 86th light-receiving element (86) and the 87th light-receiving element (87) and may be arranged in the form of an isosceles triangle. The 36th light-emitting element (36) may be equidistant from the 84th light-receiving element (84) and the 87th light-receiving element (87) and may be arranged in the form of an isosceles triangle. The remaining light-emitting elements positioned on a concentric circle may similarly be equidistant from the two light-receiving elements and may be arranged in the form of an isosceles triangle.

[0112] As an example, the 84th light-receiving element (84) may be equidistant from the 33rd light-emitting element (33) and the 36th light-emitting element (36) and arranged in the form of an isosceles triangle. The 85th light-receiving element (85) may be equidistant from the 33rd light-emitting element (33) and the 34th light-emitting element (34) and arranged in the form of an isosceles triangle. The 86th light-receiving element (86) may be equidistant from the 34th light-emitting element (34) and the 35th light-emitting element (35) and arranged in the form of an isosceles triangle. The 87th light-receiving element (87) may be equidistant from the 35th light-emitting element (35) and the 36th light-emitting element (36) and arranged in the form of an isosceles triangle.

[0113] Referring to FIG. 8g, an optical biosignal sensor (310) including five light-emitting elements and eight light-receiving elements is illustrated.

[0114] For example, one light-emitting element may be arranged at the center of the central region, and four light-emitting elements may be arranged on concentric circles in the central region. Eight light-receiving elements may be arranged on concentric circles in the outer region. The four light-emitting elements arranged on concentric circles in the central region may be arranged at substantially the same angles (or, the same spacing). The eight light-receiving elements arranged on concentric circles in the outer region may also be arranged at substantially the same angles (or, the same spacing).

[0115] As an example, the 38th light-emitting element (38) may be spaced equidistantly from the 92nd light-receiving element (92) and the 89th light-receiving element (89) and arranged in an isosceles triangle shape. The remaining light-emitting elements positioned on the concentric circle may similarly be spaced equidistantly from the two light-receiving elements and arranged in an isosceles triangle shape.

[0116] As an example, the 92nd light-receiving element (92) may be spaced equidistantly from the 41st light-emitting element (41) and the 38th light-emitting element (38) and arranged in an isosceles triangle shape. The remaining light-receiving elements positioned on a concentric circle may similarly be spaced equidistantly from the two light-emitting elements and arranged in an isosceles triangle shape.

[0117] Referring to FIG. 8h, a plurality of light-emitting elements arranged on a plurality of concentric circles are illustrated. The plurality of light-emitting elements arranged in a central region of the optical biosignal sensor (310) may be arranged on a plurality of concentric circles (3, 5). As an example, one light-emitting element may be arranged at the center of the central region. Eight light-emitting elements may be arranged on a first concentric circle (3). Sixteen light-emitting elements may be arranged on a second concentric circle (5). The second concentric circle (5) may be located outside the first concentric circle (3). When a plurality of light-emitting elements are arranged on a plurality of concentric circles, a plurality of light-emitting elements including substantially the same wavelength may be arranged on the same concentric circle.

[0118] For example, multiple light-receiving elements may be arranged on multiple concentric circles. As an example, four light-receiving elements may be arranged on a third concentric circle in the outer region, and eight light-receiving elements may be arranged on a fourth concentric circle outside the third concentric circle. Among the multiple light-receiving elements, multiple light-receiving elements having the same shape and / or size may be arranged symmetrically with respect to the center of the central region.

[0119] FIGS. 9A and 9B are diagrams illustrating an optical path between a light-emitting element and a light-receiving element according to various embodiments.

[0120] Referring to FIG. 9A, an optical biosignal sensor (310) included in an electronic device (300) may be positioned on the skin. A light-emitting element (311) and a light-receiving element (313) included in the optical biosignal sensor (310) may be positioned on the skin at a predetermined distance (d). When the light-emitting element (311) is turned on, it may output light of a unique wavelength. The light output from the light-emitting element (311) may penetrate the skin along a curved path. The curved path along which the output light travels may be an optical path. The distance (d') of the optical path may be different from the distance (d) between the light-emitting element (311) and the light-receiving element (313). The light that has traveled along the optical path may be received by the light-receiving element (313).

[0121] The formula for absorbance is as in (Formula 1), and the concentration of antioxidants can be calculated based on the formula for absorbance.

[0122] A = log Ii / Io = ε*c*d ----- (Equation 1)

[0123] log Ii = log Io - ε*c*d

[0124] The above (Formula 1) is merely an example to aid understanding, and the embodiments of the present disclosure may not be limited thereto. For example, the above (Formula 1) may be modified, applied, or expanded in various ways.

[0125] Here, A is the absorbance, Ii is the amount of light before transmission (or, the amount emitted by the light-emitting element), Io is the amount of light after transmission (or, the amount incident on the light-receiving element), ε is the absorbance of the antioxidant, c is the concentration of the antioxidant, and d is the distance between the light-emitting element and the light-receiving element.

[0126] Referring to FIG. 9B, an example of penetration depth according to wavelength is illustrated. As an example, the thickness of the epidermis of the skin may be about 0.1 μm to about 0.14 μm, the thickness of the dermis may be about 0.5 μm to about 3 mm, and the thickness of the hypodermis may be about 3 mm to about 50 mm. Green light (e.g., wavelength of about 500 nm to about 550 nm) can penetrate into the epidermis and the upper part of the dermis. Red light (e.g., wavelength of about 640 nm to about 800 nm) can penetrate into the lower part of the dermis or near the border of the subcutis. Infrared light (e.g., wavelength of about 800 nm to about 1000 nm) can penetrate into the subcutis. An optical biosignal sensor (310) for measuring the concentration of an antioxidant can utilize light that penetrates into the epidermis or the upper part of the dermis. As an example, the distance between the light emitting element and the light receiving element can be adjusted based on the penetration depth of light according to wavelength.

[0127] Fig. 10 is a drawing explaining the distance deviation according to the arrangement of the light receiving element according to various embodiments.

[0128] Referring to FIG. 10, the distance deviation of the optical path according to the number of light-emitting elements (43) and light-receiving elements located at the center of the central region is illustrated. As an example, the distance deviation of the optical path according to one light-emitting element (43) and one light-receiving element (94) may be about 19.8. The distance deviation of the optical path according to one light-emitting element (43) and two light-receiving elements (94, 95) arranged at an angle of about 90 degrees may be about 14. The distance deviation of the optical path according to one light-emitting element (43) and two light-receiving elements (94, 96) arranged at an angle of about 180 degrees may be about 9.9. The distance deviation of the optical path according to one light-emitting element (43) and three light-receiving elements (94, 95, 96) arranged at an angle of about 90 degrees may be about 9.3. The distance deviation of the optical path according to one light emitting element (43) and four light receiving elements (94, 95, 96, 97) arranged at an angle of about 90 degrees can be about 7.

[0129] Referring to FIG. 10, it can be seen that the distance deviation of the optical path becomes smaller as the number of light-receiving elements arranged at substantially the same distance from the light-emitting element (43) increases, and when the same number of light-receiving elements are arranged symmetrically with respect to the light-emitting element (43), the distance deviation of the optical path becomes smaller.

[0130] Figure 11 is a diagram illustrating antioxidant levels according to various embodiments.

[0131] As an example, the concentration of antioxidants can be measured by contacting a finger or palm with an optical biosignal sensor (310) or by wearing an electronic device (300) (e.g., a smartwatch). As an example, the antioxidant level can be calculated or estimated based on the amount of light obtained for each wavelength band by pressurizing the worn electronic device (300).

[0132] As illustrated in Figure 11, antioxidants are substances that prevent oxidation in the body. Antioxidant levels can increase with exercise or consumption of vegetables and / or fruits. Antioxidant levels can decrease with reduced vegetable and / or fruit intake, or due to stress, alcohol consumption, illness, and other factors.

[0133] FIG. 12 is a flowchart illustrating a method of measuring a biosignal according to various embodiments.

[0134] In the following examples, the operations may be performed sequentially, but are not necessarily sequential. For example, the order of the operations may be changed, and at least two operations may be performed in parallel.

[0135] According to one embodiment, steps 1210 to 1220 may be understood to be performed in a processor (e.g., processor (120) of FIG. 1) of an electronic device (e.g., electronic device (101) of FIG. 1).

[0136] Referring to FIG. 12, according to one embodiment, the electronic device (300) may sequentially turn on a plurality of light-emitting elements arranged in a preset central region equidistant from at least one of a plurality of light-receiving elements based on a wavelength (1010). For example, the electronic device (300) may include an optical biosignal sensor (310). The optical biosignal sensor (310) may include a light-emitting element (311) and a light-receiving element (313). For example, the light-emitting element (311) may be arranged in a preset central region of the optical biosignal sensor (310), and the light-receiving element (313) may be arranged in an outer region of the central region equidistant from the light-emitting element (311).

[0137] For example, the optical biosignal sensor (310) may include a plurality of light-emitting elements. The plurality of light-emitting elements may be arranged equidistantly from at least one of the plurality of light-receiving elements. Among the plurality of light-emitting elements, a light-emitting element with a largest size or a light-emitting element with a shortest wavelength may be arranged at the center of a central region. The plurality of light-emitting elements may be arranged on concentric circles in the central region. The number of concentric circles in the central region may be plural. For example, the plurality of light-emitting elements may output light of a unique wavelength. The plurality of light-emitting elements may output light of different wavelengths, and at least two light-emitting elements may output light of substantially the same wavelength. Among the plurality of light-emitting elements, a plurality of light-emitting elements having substantially the same wavelength may be arranged on the same concentric circle.

[0138] For example, a plurality of light-receiving elements may be arranged on concentric circles in the outer region at substantially equal angular intervals relative to the center of the central region and adjacent light-receiving elements. The number of concentric circles in the outer region may be plural. Among the plurality of light-receiving elements, a plurality of light-receiving elements having at least one substantially identical shape or size may be arranged symmetrically with respect to the center of the central region.

[0139] The electronic device (300) can activate a plurality of light-receiving elements arranged at substantially the same distance from a light-emitting element that is turned on among a plurality of light-receiving elements arranged in an outer region of a central region, and can deactivate at least one remaining light-receiving element (1020). As an example, the optical biosignal sensor (310) can include one light-emitting element and six light-receiving elements. Among the six light-receiving elements, light-receiving elements a and b can be arranged at an x ​​distance from the light-emitting element, light-receiving elements c and d can be arranged at a y distance from the light-emitting element, and light-receiving elements e and f can be arranged at a z distance from the light-emitting element. The electronic device (300) can turn on the light-emitting elements. While the light-emitting elements maintain a turned-on state, the electronic device (300) can turn on light-receiving elements a and b, which are spaced apart by an x ​​distance, to receive a signal, and turn off the remaining light-receiving elements (or maintain a turned-off state). The electronic device (300) can sequentially turn on the light-receiving elements c and d, which are spaced apart by a distance y, to receive a signal, and turn off (or maintain in a turned-off state) the remaining light-receiving elements. The electronic device (300) can sequentially turn on the light-receiving elements e and f, which are spaced apart by a distance z, to receive a signal, and turn off (or maintain in a turned-off state) the remaining light-receiving elements.

[0140] The electronic device (300) can measure the concentration of antioxidant substances in a living body by averaging the signals received by a plurality of activated photodetectors.

[0141] As an example, an optical biosignal sensor (310) may include a light-emitting element (311), a plurality of light-receiving elements (313), and a control element (315) that controls the light-emitting element (311) and the plurality of light-receiving elements (313). The light-emitting element (311) may be arranged in a preset central region, and the plurality of light-receiving elements (313) may be arranged at an equidistant distance from the light-emitting element (311) in an outer region of the central region.

[0142] As an example, the plurality of light-receiving elements (313) may be arranged so that a preset substantially equal angle is formed between the center of the central region and the adjacent light-receiving elements (313) on at least one concentric circle of the outer region.

[0143] As an example, among the plurality of light-receiving elements (313), a plurality of light-receiving elements (313) having at least one substantially identical shape or size may be arranged symmetrically with respect to the center of the central region.

[0144] As an example, the optical biosignal sensor (310) may include a plurality of light-emitting elements (311), and the plurality of light-emitting elements (311) may be arranged equidistantly from at least one of the plurality of light-receiving elements (313).

[0145] As an example, among the plurality of light-emitting elements (311), the light-emitting element (311) with the largest size or the light-emitting element (311) with the shortest wavelength may be placed at the center of the central region.

[0146] As an example, the plurality of light-emitting elements (311) may be arranged on at least one concentric circle in the central region.

[0147] As an example, among the plurality of light-emitting elements (311), a plurality of light-emitting elements (311) having substantially the same wavelength may be arranged on the same concentric circle.

[0148] As an example, the control element (315) can control the plurality of light-emitting elements (311) to be sequentially turned on based on wavelength.

[0149] As an example, the control element (315) can control at least one light-receiving element (313) positioned at substantially the same distance from the light-emitting element (311) being turned on among the plurality of light-receiving elements (313) to be activated, and control at least one remaining light-receiving element (313) to be deactivated.

[0150] As an example, an electronic device (300) may include an optical biosignal sensor (310), at least one processor (330), and a memory (320) that stores instructions executed by the at least one processor (330). The optical biosignal sensor (310) may include a light-emitting element (311), a plurality of light-receiving elements (313), and a control element (315) that controls the light-emitting element (311) and the plurality of light-receiving elements (313). The light-emitting element (311) may be arranged in a preset central region, and the plurality of light-receiving elements (313) may be arranged at an equidistant distance from the light-emitting element (311) in an outer region of the central region.

[0151] As an example, the plurality of light-receiving elements (313) may be arranged so that a preset substantially equal angle is formed between the center of the central region and the adjacent light-receiving elements (313) on at least one concentric circle of the outer region.

[0152] As an example, among the plurality of light-receiving elements (313), a plurality of light-receiving elements (313) having at least one substantially identical shape or size may be arranged symmetrically with respect to the center of the central region.

[0153] As an example, the optical biosignal sensor (310) may include a plurality of light-emitting elements (311). The plurality of light-emitting elements (311) may be arranged at an equidistant distance from at least one of the plurality of light-receiving elements (313).

[0154] As an example, among the plurality of light-emitting elements (311), the light-emitting element (311) with the largest size or the light-emitting element (311) with the shortest wavelength may be placed at the center of the central region.

[0155] As an example, the plurality of light-emitting elements (311) may be arranged on at least one concentric circle in the central region.

[0156] As an example, among the plurality of light-emitting elements (311), a plurality of light-emitting elements (311) having the same wavelength can be arranged on the same concentric circle.

[0157] As an example, a command stored in the memory (320) may be set to cause the electronic device (300) to sequentially turn on the plurality of light-emitting elements (311) based on wavelength through the control element (315).

[0158] As an example, the command stored in the memory (320) may be set to cause the electronic device (300) to activate, through the control element (315), a plurality of light-receiving elements (313) arranged at substantially the same distance from the light-emitting element (311) being turned on among the plurality of light-receiving elements (311), and to deactivate at least one remaining light-receiving element (313).

[0159] As an example, the command stored in the memory (320) may be set to cause the electronic device (300) to measure the concentration of sulfur oxides in the body by averaging the signals received by the plurality of activated light-receiving elements (313).

[0160] As an example, a method for measuring a biosignal in an electronic device including a plurality of light-emitting elements and a plurality of light-receiving elements may include an operation of sequentially turning on a plurality of light-emitting elements arranged in a central region equidistant from at least one of the plurality of light-receiving elements based on a wavelength. The method may include an operation of activating a plurality of light-receiving elements arranged in an outer region of the central region, the plurality of light-receiving elements being arranged at a substantially equal distance from the light-emitting element being turned on, and deactivating at least one remaining light-receiving element.

[0161] The various embodiments of this document and the terminology used therein 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 those 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 (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.

[0162] The term "module" used in various embodiments of this document 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).

[0163] Various embodiments 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.

[0164] According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0165] According to various embodiments, 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 separately arranged in other components. According to various embodiments, 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 various embodiments, 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.

[0166] The effects of this document are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the above description.

Claims

1. Light-emitting element; and a plurality of photodetectors; and A control element that controls the light-emitting element and the plurality of light-receiving elements; The above light emitting element is placed in a preset central area, An optical biosignal sensor in which the plurality of light-receiving elements are arranged at an equidistant distance from the light-emitting elements in an outer region of the central region.

2. In paragraph 1, The above plurality of photodetectors are, An optical biosignal sensor arranged so that the center of the central region and the adjacent light-receiving elements are at a preset same angle on at least one concentric circle of the outer region.

3. In paragraph 1, An optical biosignal sensor in which a plurality of light-receiving elements having at least one of the same shape or size among the plurality of light-receiving elements are arranged symmetrically with respect to the center of the central region.

4. In paragraph 1, The optical biosignal sensor includes a plurality of light-emitting elements, An optical biosignal sensor in which the plurality of light-emitting elements are arranged equidistantly from at least one of the plurality of light-receiving elements.

5. In paragraph 4, An optical biosignal sensor in which the largest light-emitting element or the light-emitting element with the shortest wavelength among the plurality of light-emitting elements is positioned at the center of the central region.

6. In paragraph 4, An optical biosignal sensor wherein the plurality of light-emitting elements are arranged on at least one concentric circle in the central region.

7. In paragraph 6, An optical biosignal sensor in which a plurality of light-emitting elements having the same wavelength among the plurality of light-emitting elements are arranged on the same concentric circle.

8. In paragraph 4, The above control element An optical biosignal sensor that controls the plurality of light-emitting elements to be sequentially turned on based on wavelength.

9. In paragraph 8, The above control element, An optical biosignal sensor that controls at least one light-receiving element among the plurality of light-receiving elements to be activated and controls at least one remaining light-receiving element to be deactivated.

10. A method for measuring a biosignal in an electronic device including a plurality of light-emitting elements and a plurality of light-receiving elements, An operation of sequentially turning on a plurality of light-emitting elements arranged in a central region equidistant from at least one of the plurality of light-receiving elements based on wavelength; and A method comprising: activating a plurality of light-receiving elements arranged at the same distance from a light-emitting element that is turned on among a plurality of light-receiving elements arranged in an outer region of the central region, and deactivating at least one remaining light-receiving element.

11. In paragraph 10, A method further comprising: an operation of measuring the concentration of sulfur oxides in a living body by averaging signals received by the plurality of activated photodetectors.

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