Electronic device, and non-invasive blood glucose measurement method of electronic device

Abstract

In an electronic device and an operation method of the electronic device, according to one embodiment, the electronic device may comprise: a light source unit for generating lights of a plurality of wavelength bands; an optical body for irradiating the lights of the plurality of wavelength bands onto the skin of a user; a light-receiving unit for detecting light obtained by reflecting the lights of the plurality of wavelength bands from the skin of the user; a memory for storing at least one computer program including instructions; and at least one processor. When individually or collectively executed by the at least one processor, the instructions can instruct the electronic device to: acquire the intensity of irradiation light of a specific wavelength band irradiated from the light source unit at the user and the intensity of reflected light obtained by reflecting the irradiation light of the specific wavelength band from the user; calculate the response gain of the irradiation light of the specific wavelength band on the basis of the ratio of the intensity of the irradiation light to the intensity of the reflected light; and identify a blood glucose level corresponding to the calculated response gain by using a blood glucose level database including blood glucose level information corresponding to the response gain of each of irradiation lights of the plurality of wavelength bands.

Description

Electronic devices and noninvasive blood glucose measurement methods for electronic devices

[0001] The present disclosure relates to an electronic device and a non-invasive blood glucose measurement method of the electronic device, and to a technology for non-invasive blood glucose measurement of the electronic device and the electronic device.

[0002] Methods for monitoring blood sugar levels can be categorized into invasive and non-invasive methods. Invasive methods involve collecting a blood sample from a specific body part and measuring blood sugar levels using a glucometer. Non-invasive methods, while numerous, are among the most extensively studied. They involve irradiating the skin with light of a specific wavelength or wavelength band and analyzing the transmitted or reflected light to measure blood sugar levels.

[0003] Invasive blood glucose measurement methods involve collecting blood samples, which can cause skin damage. Non-invasive blood glucose measurement methods measure blood glucose levels without damaging the skin, as they irradiate light and measure blood glucose levels based on the reflected light. Non-invasive methods can be used when blood glucose levels need to be measured regularly.

[0004] Electronic devices can measure a user's blood sugar level using a non-invasive method. The electronic device can generate light of a specific wavelength (or wavelength band) and irradiate it onto the user's skin. This light of a specific wavelength can be absorbed (or scattered) by glucose molecules in the blood. The electronic device can then detect the light reflected or transmitted through the user's skin to determine the user's blood sugar level.

[0005] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0006] Electronic devices can illuminate the user's skin with light corresponding to a single wavelength or wavelength band and measure the user's blood sugar level based on the reflected light. Some electronic devices measure blood sugar levels based on light corresponding to a single wavelength, but this can reduce the accuracy of the measured blood sugar level. For example, if reflected light is inaccurately detected due to noise in a wavelength band similar to the wavelength band of light corresponding to the wavelength band, the electronic device may determine blood sugar levels relatively inaccurately due to the absence of light in other wavelength bands that were measured separately.

[0007] Electronic devices using a single wavelength may measure blood glucose levels based on light whose response gain does not significantly vary with blood glucose levels. Light of a specific single wavelength may have a response gain that varies sensitively within a specific blood glucose level range. Since electronic devices using a single wavelength do not pre-identify light whose response gain varies sensitively with blood glucose levels, the accuracy of blood glucose level measurements based on response gain may be limited.

[0008] Electronic devices using a single wavelength may experience temperature changes depending on the user's body temperature or the external temperature. The wavelength and / or luminous power of the light generated by the electronic device may change depending on the temperature of the electronic device. Electronic devices using a single wavelength may not be able to accurately measure blood glucose levels based on response gain, as the wavelength and / or luminous power of the light generated by the electronic device may change with temperature.

[0009] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010] An electronic device according to one embodiment may include a light source unit that generates light composed of a plurality of wavelengths. The electronic device may include an optical body that irradiates the light composed of the plurality of wavelengths onto a user's skin. The electronic device may include a light receiving unit that detects light composed of the plurality of wavelengths reflected from the user's skin. The electronic device may include a memory that stores at least one computer program including instructions. The electronic device may include at least one processor. The instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to obtain an intensity of irradiated light of a specific wavelength band irradiated to the user from the light source unit and an intensity of reflected light reflected from the user by the irradiated light of the specific wavelength band. The instructions may cause the electronic device to calculate a response gain of the irradiated light of the specific wavelength band based on a ratio of the intensity of the irradiated light and the intensity of the reflected light. The instructions may cause the electronic device to determine a blood glucose level corresponding to the calculated response gain using a blood glucose level database containing blood glucose level information corresponding to the response gain of each of the light sources of the plurality of wavelength bands.

[0011] In one embodiment, a computer-readable recording medium may store instructions that, when executed by a processor of an electronic device, cause the electronic device to perform. The instructions, when individually or collectively executed by the at least one processor, may enable the electronic device to obtain an intensity of irradiated light of a specific wavelength band irradiated to a user from the light source unit and an intensity of reflected light reflected from the user by the irradiated light of the specific wavelength band. The instructions may enable the electronic device to calculate a response gain of the irradiated light of the specific wavelength band based on a ratio of the intensity of the irradiated light and the intensity of the reflected light. The instructions may enable the electronic device to check a blood glucose level corresponding to the calculated response gain using a blood glucose level database including blood glucose level information corresponding to the response gain of each of the irradiated lights of a plurality of wavelength bands.

[0012] In one embodiment, a method for setting a blood sugar level database of an electronic device may include a step of acquiring blood sugar level information of a user. The method for setting a blood sugar level database of an electronic device may include a step of irradiating a user with light of a plurality of wavelength bands. The method may include a step of calculating a response gain of each of the light of the plurality of wavelength bands corresponding to an intensity of the light of the plurality of wavelength bands and an intensity of reflected light reflected from the user by the light of the plurality of wavelength bands. The method for setting a blood sugar level database of an electronic device may include a step of storing blood sugar level information according to the response gain of each of the light of the plurality of wavelength bands in the blood sugar level database.

[0013] According to one embodiment, a blood glucose measurement method of an electronic device may include an operation of obtaining an intensity of irradiated light of a specific wavelength band irradiated to a user from a light source unit and an intensity of reflected light reflected from the user by the irradiated light of the specific wavelength band. The blood glucose measurement method of the electronic device may include an operation of calculating a response gain of the irradiated light of the specific wavelength band based on a ratio of the intensity of the irradiated light and the intensity of the reflected light. The blood glucose measurement method of the electronic device may include an operation of confirming a blood glucose level corresponding to the calculated response gain by using a blood glucose level database including blood glucose level information corresponding to the response gains of irradiated lights of a plurality of wavelength bands.

[0014] An electronic device can measure a user's blood sugar level by irradiating the user's skin with light of multiple wavelengths. The electronic device can measure blood sugar levels based on the light reflected from each of the multiple wavelengths. This allows the electronic device to more accurately measure the user's blood sugar level, even in situations where measurements using a single wavelength of light are unavailable.

[0015] An electronic device can measure a user's blood sugar level based on a blood sugar level database corresponding to the response gains of multiple wavelengths. The wavelengths included in the database may include wavelengths at which the change in blood sugar level due to changes in the response gain of light irradiated onto the user's skin exceeds a threshold value. By generating light at wavelengths sensitive to changes in blood sugar level, the electronic device can more accurately measure the user's blood sugar level.

[0016] An electronic device can store information that has previously determined the amount of change in the wavelength and / or luminous power of light due to changes in temperature. Even if the wavelength and / or luminous power of light generated by the distributed feedback laser diode changes due to changes in temperature, the electronic device can generate light having a previously set wavelength and luminous power by changing the current applied to the distributed feedback laser diode.

[0017] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0018] In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

[0019] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0020] FIG. 2 is a drawing illustrating a blood sugar measurement device according to one embodiment.

[0021] Figure 3 is a block diagram of an electronic device according to one embodiment.

[0022] FIG. 4 is a diagram illustrating an electronic device according to one embodiment.

[0023] FIG. 5 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0024] FIGS. 6A and 6B are drawings illustrating an optical body according to one embodiment.

[0025] FIG. 7 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0026] FIG. 8 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0027] Figure 9 is a flowchart illustrating an operation for setting up a blood sugar level database according to one embodiment.

[0028] Figure 10 is a flowchart of the operation of an electronic device according to one embodiment.

[0029] 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.

[0030] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0031] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0032] 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 operations. According to one embodiment, as at least a part of the data processing or operations, 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 (CPU) or an application processor (AP)) or an auxiliary processor (123) (e.g., a graphic processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0033] The auxiliary processor (123) may control at least a part of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0034] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0035] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (OS) (142), middleware (144), or an application (146).

[0036] 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).

[0037] 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.

[0038] 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.

[0039] 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).

[0040] 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.

[0041] 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, a secure digital (SD) card interface, or an audio interface.

[0042] 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).

[0043] 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.

[0044] 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.

[0045] 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).

[0046] 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.

[0047] 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, Wi-Fi (wireless fidelity) direct, or IrDA (infrared data association)) 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 a wide area network (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).

[0048] 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). NR access technology can support high-speed transmission of high-capacity data (eMBB, enhanced mobile broadband), minimizing terminal power and connecting multiple terminals (mMTC, massive machine type communications), or high reliability and low latency communications (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.

[0049] 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).

[0050] 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.

[0051] 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)).

[0052] 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 another 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.

[0053] FIG. 2 is a drawing illustrating a blood sugar measurement device according to one embodiment.

[0054] Figure 2 is a drawing for explaining a problem of a blood glucose measurement device (200). The blood glucose measurement device (200) may include a light source unit (210), an optical body (220), and a light receiving unit (230).

[0055] The light source unit (210) can generate light (211) composed of a single wavelength light source. The light (211) generated by the light source unit (210) can be irradiated at a specific angle from the surface of the light source unit (210) or can be irradiated in a vertical direction from the surface of the light source unit (210). The light (211) generated by the light source unit (210) can be incident on an optical body (220).

[0056] The optical body (220) can irradiate light (211) composed of a single wavelength light source incident from the light source unit (210) onto the user's skin. The light (211) composed of a single wavelength light source generated by the light source unit (210) can be incident onto the user's skin through the optical body (220).

[0057] The optical body (220) can transmit light (231) corresponding to a single wavelength light source reflected from the user's skin. The light (231) corresponding to the single wavelength light source reflected from the user's skin can pass through the optical body (220) and at least partially enter the light receiving unit (230). The light receiving unit (230) can convert the light (231) corresponding to the reflected single wavelength light source into a photoelectric signal.

[0058] The blood glucose measurement device (200) can detect light (231) corresponding to a reflected single-wavelength light source. The blood glucose measurement device (200) can determine the blood glucose level based on the response gain of the light (231) corresponding to the reflected single-wavelength light source. When the blood glucose measurement device (200) measures the user's blood glucose level based on the light (231) corresponding to the reflected single-wavelength light source, the blood glucose level can be determined based on one response gain corresponding to the single-wavelength light source. Since the blood glucose measurement device (200) determines the blood glucose level using only one response gain, the accuracy of the measured blood glucose level may be relatively low. For example, if the response gain is inaccurately measured due to noise of a wavelength similar to the wavelength of the light (211) composed of the single-wavelength light source, the blood glucose measurement device (200) may measure the blood glucose level based on the relatively inaccurately measured response gain because there is no separately measured response gain.

[0059] The blood glucose measurement device (200) may measure blood glucose based on light whose response gain does not significantly change depending on the blood glucose level. Light of a specific wavelength may have a response gain that changes sensitively within a specific blood glucose level numerical range. Since the blood glucose measurement device (200) does not check in advance the light whose response gain changes sensitively depending on the blood glucose level, the accuracy of measuring blood glucose levels based on the response gain may be limited.

[0060] The blood glucose measurement device (200) may have a temperature that may change depending on the user's body temperature or the external temperature. The temperature of the light source unit (210) that generates light may change depending on the change in the temperature of the blood glucose measurement device (200). The wavelength and / or luminous power of the light generated by the light source unit (210) may change depending on the change in the temperature of the distributed feedback laser diode. The blood glucose measurement device (200) may not be able to determine the amount of change in the wavelength and / or luminous power of the light depending on the change in temperature. The blood glucose measurement device (200) may not be able to accurately measure the blood glucose level depending on the response gain because the wavelength and / or luminous power of the light generated by the light source unit (210) changes depending on the change in temperature.

[0061] Figure 3 is a block diagram of an electronic device according to one embodiment.

[0062] The electronic device (300) may include a light source (310), an optical body (320), a light receiving unit (330), a processor (340), and a memory (350). Even if some of the illustrated components are omitted or replaced with other components, various embodiments of the present document may be implemented. In addition to the illustrated components, the electronic device (300) may further include at least some of the components and / or functions of the electronic device (101) of FIG. 1 and the electronic device (400) of FIG. 4. At least some of the components of the illustrated (or not illustrated) electronic device (300) may be operatively, functionally, and / or electrically connected to each other.

[0063] The processor (340) may include at least one processing circuitry, and the processor (340) may include at least one processor (340). The operations described below may be performed individually or collectively by at least one processor (340) included in the processor (340).

[0064] The number of processors (340) may be one or more. For example, the processor (120) may have a multi-core processor structure such as a dual core, quad core, or hexa core.

[0065] The processor (340) can control the operations of the electronic device (300) by executing instructions stored in the memory (350). For example, the processor (340) can correspond to a plurality of processors that collectively perform a plurality of operations by dividing them among the processors.

[0066] The memory (350) can store at least one computer program, and the at least one computer program can include instructions that can be executed by the processor (340). The operations of the processor (340) described below can be performed according to the execution of the instructions contained in the memory (350).

[0067] The memory (350) can store a blood sugar level database corresponding to the response gain of the irradiated light compared to the irradiated light by wavelength. However, the blood sugar level database may not always be stored in the memory (350). For example, the electronic device (300) can check the blood sugar level database stored in a server (e.g., server (108) of FIG. 1) or download the blood sugar level database from a server (e.g., server (108) of FIG. 1).

[0068] The light source unit (310) may include a distributed feedback (DFB) array. The distributed feedback (DFB) array may include a plurality of distributed feedback laser diodes that generate light corresponding to a plurality of wavelengths.

[0069] The electronic device (300) may include a temperature sensor. The temperature sensor may include at least one thermistor. A thermistor may refer to a semiconductor device whose resistance changes depending on temperature. In the present disclosure, the temperature sensor may be disposed near the light source unit (310) to measure the temperature of the distributed feedback laser diode. Measuring the temperature of the distributed feedback laser diode may include measuring the temperature of a surrounding area of ​​the distributed feedback laser diode to measure the temperature of the distributed feedback laser diode. For example, the operation of measuring the temperature of the DFB array and / or the light source unit (310) may refer to the operation of measuring the temperature of the distributed feedback laser diode. However, the temperature sensor of the present disclosure including at least one thermistor is only one example, and the temperature sensor may include a thermocouple, a resistance temperature detector (RTD), or an infrared-based temperature detector in addition to the thermistor.

[0070] The light source unit (310) may include a wavelength measurement sensor. For example, the light source unit (310) may include a wavelength measurement sensor that measures the degree to which the wavelength of light generated by the distributed feedback laser diode changes. The wavelength measurement sensor may refer to a Mach-Zehnder interferometer, for example, and may be used to measure wavelength changes.

[0071] The blood glucose database may include pre-verified user blood glucose level information corresponding to the response gain of light of a specific wavelength. The blood glucose database may refer to a database referenced by the electronic device (300) to determine blood glucose levels. The process of establishing a blood glucose level database in the form of a lookup table will be described below in FIG. 9.

[0072] The blood glucose level database obtained by wavelength band and response gain can be stored in the form of [Table 1].

[0073] Blood glucose wavelength λ1 response gain wavelength λ4 response gain 81-85304086-90405091-95506096-1006070

[0074] The wavelength band (e.g., wavelength λ1, wavelength λ4) included in the blood glucose level database may refer to some of the wavelength bands corresponding to light irradiated on the user's skin during the process of setting the blood glucose level database. Some of the light irradiated on the user's skin may not significantly change the blood glucose level according to changes in response gain. The blood glucose level database may not include light that does not significantly change the blood glucose level according to changes in response gain (e.g., light whose change rate is less than a threshold value). The blood glucose level database may include information on light that significantly changes the blood glucose level according to changes in response gain (e.g., light whose change rate is greater than or equal to a threshold value). The processor (340) may control the distributed feedback laser diode to generate light of the wavelength band included in the blood glucose level database. As shown in [Table 1], as the blood glucose level increases, moisture may penetrate into the blood vessels, increasing the amount of irradiated light absorbed. As the amount of light absorbed by the irradiated source increases, the intensity of the reflected light may decrease. The processor (340) may control a plurality of distributed feedback laser diodes to generate light corresponding to each of a plurality of wavelengths (bands).

[0075] A distributed feedback laser diode may refer to a semiconductor manufactured to generate light. A distributed feedback laser diode may refer to a diode configured to output light of a specific frequency (or wavelength band). For example, a distributed feedback laser diode may be configured to have a side mode suppression ratio (SMSR) of about 30 dB or more between a peak mode and a mode with the second highest output power after the peak mode during operation. The peak mode may refer to a mode in which a distributed feedback laser diode is configured to output light of a specific frequency at the highest power.

[0076] A plurality of distributed feedback laser diodes may be configured to generate light of different wavelengths. The collection of light generated by the plurality of distributed feedback laser diodes may constitute a laser spectrum of multiple wavelengths. For example, the plurality of distributed feedback laser diodes may be configured to generate light of a wavelength band included in a blood glucose level database. The electronic device (300) may measure the user's blood glucose level based on light of a wavelength band included in the blood glucose level database generated by the plurality of distributed feedback laser diodes.

[0077] A distributed feedback laser diode can determine the wavelength of light output based on the current applied to the distributed feedback laser diode. In one example, the wavelength of light output from the distributed feedback laser diode can change as the current applied to the distributed feedback laser diode changes. The change in the wavelength of light generated by the distributed feedback laser diode according to the change in the applied current to the distributed feedback laser diode can be confirmed in advance.

[0078] A distributed feedback laser diode can determine the wavelength of light it outputs based on the temperature of the distributed feedback laser diode. As the temperature of the distributed feedback laser diode increases, the energy band gap of the distributed feedback laser diode can decrease. As the energy band gap of the distributed feedback laser diode decreases, the wavelength of light generated by the distributed feedback laser diode can become longer. The change in the wavelength of light generated by the distributed feedback laser diode according to the change in the temperature of the distributed feedback laser diode can be confirmed in advance.

[0079] A distributed feedback laser diode can have its emitted power determined based on the current applied to the distributed feedback laser diode. When a current exceeding a threshold current is applied to the distributed feedback laser diode, the emitted power of the distributed feedback laser diode can increase as the applied current increases. The threshold current can refer to the minimum current that must be applied to the distributed feedback laser diode to output light. A change in the emitted power generated by the distributed feedback laser diode can be confirmed in advance according to a change in the current applied to the distributed feedback laser diode.

[0080] A distributed feedback laser diode can determine the emitted power output based on the temperature of the distributed feedback laser diode. As the temperature of the distributed feedback laser diode increases, the energy band gap of the distributed feedback laser diode can decrease. As the energy band gap of the distributed feedback laser diode decreases, the threshold current of the distributed feedback laser diode can increase. Since the emitted power of the distributed feedback laser diode increases as the applied current increases when a current exceeding the threshold current is applied, the emitted power may decrease as the threshold current increases. A change in the emitted power generated by the distributed feedback laser diode according to a change in the temperature of the distributed feedback laser diode can be confirmed in advance.

[0081] The memory (350) can store information related to a change in wavelength of a pre-identified distributed feedback laser diode. The information related to the change in wavelength can include a change in wavelength according to a change in temperature of the pre-identified distributed feedback laser diode and a change in wavelength according to a change in current applied to the pre-identified distributed feedback laser diode. The memory (350) can store information related to a change in light-emitting power of the pre-identified distributed feedback laser diode. The information related to a change in light-emitting power can include a change in light-emitting power according to a change in temperature of the pre-identified distributed feedback laser diode and a change in light-emitting power according to a change in current applied to the pre-identified distributed feedback laser diode. For example, the memory (350) can store the results of measuring a change in light-emitting power and a change in wavelength band according to a change in applied current and a change in temperature at a temperature of about 10°C to about 40°C.

[0082] The processor (340) can check (or calculate) the wavelength of light output from the distributed feedback laser diode according to the temperature of the distributed feedback laser diode and the current applied to the distributed feedback laser diode. The processor (340) can check (or calculate) the wavelength of light output from the distributed feedback laser diode based on information related to a change in the wavelength of the distributed feedback laser diode that has been previously confirmed and stored in the memory (350). For example, the processor (340) can check the change in wavelength according to the temperature and the applied current of the distributed feedback laser diode from the information related to the change in wavelength, and check (or calculate) the wavelength of light generated by the distributed feedback laser diode. The distributed feedback laser diode can be set to generate light of a specific wavelength during manufacture. The processor (340) can check (or calculate) the wavelength of light generated by the distributed feedback laser diode based on the wavelength of light that the distributed feedback laser diode is set to generate during manufacture and the change in the confirmed wavelength. The processor (340) can check (or calculate) the light emitting power of the distributed feedback laser diode according to the temperature of the distributed feedback laser diode and the current applied to the distributed feedback laser diode. The processor (340) can check (or calculate) the change in the light emitting power output from the distributed feedback laser diode based on information related to the change in the light emitting power of the distributed feedback laser diode that has been previously checked and stored in the memory (350). For example, the processor (340) can check the change in the light emitting power according to the temperature and the applied current of the distributed feedback laser diode from the information related to the change in the light emitting power, and check (or calculate) the light emitting power of the distributed feedback laser diode. The distributed feedback laser diode can be set to have a light emitting power set at the time of manufacturing.The processor (340) can check (or calculate) the light emitting power generated by the distributed feedback laser diode based on the light emitting power set to be had by the distributed feedback laser diode during manufacturing and the change in the checked light emitting power.

[0083] The processor (340) can change the wavelength and emission power of the distributed feedback laser diode by changing the current applied to the distributed feedback laser diode. The processor (340) can control a wavelength measurement sensor to measure a change in the wavelength of light output from the distributed feedback laser diode. The processor (340) can measure the emission power of the distributed feedback laser diode. The processor (340) can control a temperature sensor to measure the temperature of the distributed feedback laser diode. The processor (340) can change the current applied to the distributed feedback laser diode so that the distributed feedback laser diode has a specific wavelength based on the wavelength, emission power, and temperature of the output light confirmed above. For example, the distributed feedback laser diode may generate light of a wavelength other than the wavelength of light that the distributed feedback laser diode is set to generate at the time of manufacturing due to a change in temperature. The processor (340) can change the current applied to the distributed feedback laser diode so that the distributed feedback laser diode generates light of a wavelength (band) that it is set to generate.

[0084] The processor (340) can change the current applied to the distributed feedback laser diode to generate light of a wavelength (band) included in the blood glucose level database. The processor (340) can determine the user's blood glucose level based on the blood glucose level according to the response gain of the irradiated light having a wavelength band included in the blood glucose level database.

[0085] The processor (340) can utilize data including changes in wavelength and luminous power according to changes in temperature and current stored in the memory (350). The processor (340) can measure the change in wavelength using a wavelength measurement sensor (e.g., a Mach-Zehnder interferometer). The processor (340) can measure blood sugar levels based on the change in wavelength and luminous power.

[0086] The optical body (320) may be configured to irradiate light generated by the distributed feedback laser diode onto the user's skin. The light generated by the distributed feedback laser diode may be incident on the user's skin through the optical body (320). For example, the user's skin may include, but is not limited to, the user's fingers, and may refer to any area on the user's body.

[0087] The processor (340) can control the light receiving unit (330) to detect light reflected from the user's skin. The processor (340) can control the light receiving unit to convert the reflected light into a photoelectric signal. The light receiving unit (330) can include at least one photo diode. The light receiving unit can refer to a semiconductor that converts input light into a photoelectric signal. The light input to the light receiving unit (330) can include not only light generated from a distributed feedback laser diode and reflected from the user's skin, but also light input from the outside. The light generated from the distributed feedback laser diode and reflected from the user's skin can be used to determine the user's blood sugar level, and the light input from the outside can act as an obstacle in recognizing the light reflected from the user's skin.

[0088] The light receiving unit (330) may include an optical filter. The optical filter may refer to a filter configured to pass light of a predetermined wavelength band. However, the light receiving unit (330) may also perform filtering on input light using signal processing in addition to the optical filter. For example, the processor (340) may filter out signals of a wavelength band excluding the wavelength band of light generated by the distributed feedback laser diode by passing a photoelectric signal converted from light input to the light receiving unit (330) through a band pass filter. The processor (340) may obtain a signal of light of the same wavelength band as the wavelength band of light generated by the distributed feedback laser diode based on the optical filter or the band pass filter.

[0089] The processor (340) can determine the response gain of the irradiated light based on the amplitude of the reflected light. The processor (340) can check the amplitude of the reflected light received by the light receiving unit (330). The processor (340) can determine the response gain of the irradiated light based on the amplitude of the reflected light and the amplitude of the light generated by the distributed feedback laser diode. The response gain of the irradiated light can be determined by mathematical expression 1. In mathematical expression 1, G λ1 represents the response gain at wavelength λ1, Ir represents the amplitude of reflected light at wavelength λ1, and Io represents the amplitude of light generated by the distributed feedback laser diode at wavelength λ1.

[0090] [Mathematical Formula 1]

[0091] G λ1 = -20log(Ir / Io)

[0092] The above mathematical formula 1 is merely an example to aid understanding, and embodiments of the present disclosure may not be limited thereto. For example, the above mathematical formula 1 may be modified, applied, or expanded in various ways.

[0093] The processor (340) can determine the user's blood sugar level corresponding to the response gain of the irradiated light based on the blood sugar level database. For example, the processor (340) can check the blood sugar level corresponding to the response gain of the irradiated light from the blood sugar level database and determine the blood sugar level corresponding to the response gain of the irradiated light as the user's blood sugar level.

[0094] FIG. 4 is a diagram illustrating an electronic device according to one embodiment.

[0095] The electronic device may include a light source (410), an optical body (420), and a light receiving unit (430).

[0096] The light source unit (410) can generate lights corresponding to multiple wavelengths. The light generated by the light source unit (410) can be irradiated at a specific angle from the surface of the light source unit (410) or can be irradiated in a vertical direction from the surface of the light source unit (410). The light (411) generated by the light source unit (410) can be incident on the optical body (420).

[0097] The optical body (420) can collect light (411) incident from the light source (410) and irradiate it onto the user's skin. The light (411) generated by the light source (410) can be incident onto the user's skin through the optical body (420). For example, the user's skin may include, but is not limited to, the user's fingers, and may refer to a portion of the user's body.

[0098] The optical body (420) can transmit light (431) reflected from the user's skin. The light (431) reflected from the user's skin can pass through the optical body (420) and enter the light receiving unit (430). The light receiving unit (430) can convert the reflected light (431) into a photoelectric signal.

[0099] The electronic device (400) can detect reflected light (431) corresponding to a plurality of wavelengths. The electronic device (400) can determine the blood sugar level based on the response gain of the reflected light (431) corresponding to each of the plurality of wavelengths. For example, the electronic device (400) can determine the average of the blood sugar levels corresponding to the response gain of the reflected light (431) determined for each of the plurality of wavelengths as the user's blood sugar level. The electronic device (400) can obtain the blood sugar level with a smaller error than when measuring the user's blood sugar level based on light reflected from a single wavelength.

[0100] The electronic device (400) can control the light source unit (410) to generate light (411) corresponding to each of the wavelength bands included in the blood glucose level database. The wavelengths included in the blood glucose level database can include wavelengths in which the amount of blood glucose level change according to the change in response gain of light (431) reflected from the user's skin is greater than a threshold value. The electronic device (400) can more accurately measure the user's blood glucose level by generating light in a wavelength band sensitive to changes in blood glucose level.

[0101] The electronic device (400) may have a temperature that can change depending on the user's body temperature or the external temperature. The temperature of the distributed feedback laser diode (4101) that generates light may change depending on the change in the temperature of the electronic device (400). The wavelength and / or luminous power of the light generated by the distributed feedback laser diode (4101) may change depending on the change in the temperature of the distributed feedback laser diode (4101). The electronic device (400) may store information that has previously confirmed the amount of change in the wavelength (band) and / or luminous power of the light depending on the change in temperature. Even if the wavelength (band) and / or luminous power of the light generated by the distributed feedback laser diode (4101) changes depending on the change in temperature, the electronic device (400) may generate light having a previously set wavelength (band) and luminous power by changing the current (4102) applied to the distributed feedback laser diode (4101). For example, the electronic device (400) can change the current (4102) applied to the distributed feedback laser diode (4101) to generate light of wavelengths included in the blood glucose database.

[0102] The electronic device (400) can use data (or information) stored in the memory (350) that includes changes in wavelength and luminous power according to changes in temperature and current. The electronic device (400) can use data (or information) indicating a relationship between the temperature of the light-emitting unit, the current applied to the light-emitting unit, the wavelength of the irradiated light, and / or the luminous power of the irradiated light to determine at least one of the temperature, the current, the wavelength, and the luminous power. For example, the electronic device (400) can determine (or measure) the luminous power of the irradiated light based on information indicating the temperature of the light-emitting unit, the current applied to the light-emitting unit, and the luminous power mapped to the wavelength of the irradiated light included in the data. The electronic device (400) can measure the blood sugar level based on the determined luminous power and the wavelength of the irradiated light. The luminous power may be a value indicating the intensity of the irradiated light. In addition, the wavelength of the present disclosure may include a wavelength band.

[0103] According to one example, the wavelength of the irradiated light irradiated to the user from the light source unit may vary depending on the temperature of the light source unit. The electronic device (400) may measure the amount of change in the wavelength of the irradiated light of a specific wavelength band irradiated to the user from the light source unit using a wavelength measurement sensor. In addition, the electronic device (400) may measure the temperature of the light source unit using a temperature sensor. The electronic device (400) may correct the specific wavelength band irradiated to the user from the light source unit based on the amount of change in the measured wavelength. The corrected wavelength band may represent the wavelength band of the irradiated light actually irradiated to the user, and the corrected wavelength band may be determined (or calculated, or confirmed) by adding the amount of change in the measured wavelength to the specific wavelength band. The electronic device (400) may confirm the luminous power of the light source unit corresponding to the measured temperature and the corrected wavelength band (e.g., the wavelength band of the irradiated light actually irradiated to the user) based on data including the amount of change in the wavelength and luminous power according to changes in temperature and current. The electronic device (400) can check the blood sugar level based on the light emission power and the corrected wavelength band of the light source. For example, the electronic device (400) can check (or measure) the user's blood sugar level by checking the blood sugar level value mapped to the light emission power and the corrected wavelength band of the light source included in the blood sugar level database. The electronic device can accurately measure the user's blood sugar level by accurately measuring the wavelength and intensity of the irradiated light to the user and checking the blood sugar level corresponding to the wavelength and intensity of the irradiated light in the blood sugar level database.

[0104] FIG. 5 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0105] The light source unit may include a distributed feedback laser diode array (510), an optical waveguide (520), and a grating coupler (530).

[0106] A distributed feedback laser diode array (510) can generate lights of a plurality of different wavelengths. The distributed feedback laser diode array (510) can include a plurality of distributed feedback laser diodes (501), and each of the plurality of distributed feedback laser diodes (501) can generate lights of a set wavelength. For example, a first distributed feedback laser diode array (511) can generate lights of a wavelength λ1 to λ n The second distributed feedback laser diode array (512) can generate light of wavelength λ. n+1 Inland λ 2n The third distributed feedback laser diode array (513) can generate light of wavelength λ. 2n+1 Inland λ 3n The fourth distributed feedback laser diode array (514) can generate light of wavelength λ. 3n+1 Inland λ 4n It can generate light of. In Fig. 5, it is illustrated that each distributed feedback laser diode array includes four distributed feedback laser diodes (501), but four is an exemplary number and is not limited thereto. Wavelength λ1 to λ 4n The light may be light corresponding to each of the wavelength bands included in the blood glucose level database. The distributed feedback laser diodes (501) may be manufactured and / or configured to generate light corresponding to each of the wavelength bands included in the blood glucose level database.

[0107] The light source unit (e.g., the light source unit (310) of FIG. 3) may include a plurality of distributed feedback laser diode arrays. For example, the light source unit (e.g., the light source unit (310) of FIG. 3) may include four distributed feedback laser diode arrays. The plurality of distributed feedback laser diode arrays may be arranged in the up, down, left, and right directions, respectively, when viewing the optical body from above with the grating coupler (530) as the center. For example, the first distributed feedback laser diode array (511) may be arranged in an upper direction of the grating coupler (530). The second distributed feedback laser diode array (512) may be arranged in a rightward direction of the grating coupler (530). The third distributed feedback laser diode array (513) may be arranged in a lower direction of the grating coupler (530). The fourth distributed feedback laser diode array (514) may be arranged in the left direction of the grating coupler (530). The distributed feedback laser diode arrays can prevent each other's temperature from changing due to heat generated from each distributed feedback laser diode array by being arranged in different directions within the light source unit (e.g., the light source unit (310) of FIG. 3).

[0108] An optical waveguide (520) may be arranged in a direction facing the optical output surface of the distributed feedback laser diode array. The optical waveguide (520) may refer to a configuration that propagates light from one location to another. The optical waveguide (520) may be formed so that light output from the distributed feedback laser diode array is incident on the grating coupler (530).

[0109] The grating coupler (530) can be arranged in a direction facing the optical output surface of the distributed feedback laser diode array with the optical waveguide (520) therebetween. When light is incident from the outside (e.g., the optical waveguide (520)), the grating coupler (530) can diffract the light based on the grating structure. The grating coupler (530) can diffract the light generated by the distributed feedback laser diode array and irradiate the light to a position appropriate for blood glucose measurement. The grating coupler (530) can be configured in a number corresponding to the number of distributed feedback laser diode arrays arranged in different directions or in accordance with the number of light sources. According to FIG. 5, when four distributed feedback laser diode arrays are arranged, four or more grating couplers (530) can be arranged.

[0110] A temperature sensor (not shown) may be placed in an area close to the distributed feedback laser diode array. The temperature sensor may detect the temperature of the distributed feedback laser diode array. The electronic device may determine the current applied to the distributed feedback laser diode (501) based on the temperature of the distributed feedback laser diode array detected by the temperature sensor. The electronic device may determine the wavelength (bandwidth) and / or emission power of light output from the distributed feedback laser diode (501) by adjusting the current applied to the distributed feedback laser diode (501).

[0111] A wavelength measurement sensor (e.g., a Mach-Zehnder interferometer) can measure the wavelength of light irradiated from the grating coupler (530) using a portion of the light source output from the distributed feedback laser diode (501). The electronic device can determine (or adjust) the current applied to the distributed feedback laser diode (501) to generate light of a specific wavelength based on the temperature of the distributed feedback laser diode (501) measured by the temperature sensor and the wavelength of light measured by the Mach-Zehnder interferometer. For example, if the wavelength of light generated by the distributed feedback laser diode (501) does not match the wavelength included in the blood glucose level database, the electronic device can adjust the current applied to the distributed feedback laser diode (501) to generate light of a wavelength included in the blood glucose level database. Alternatively, if the wavelength of light generated by the distributed feedback laser diode (501) does not match the wavelength included in the blood glucose level database, the processor (310) can measure the amount of change in wavelength measured by a wavelength measurement sensor (e.g., a Mach-Zehnder interferometer) and measure the blood glucose level based on the amount of change in wavelength.

[0112] The light receiving unit (330) may be disposed at a central portion where a plurality of grating couplers (530) are disposed. The light receiving unit (330) may detect light reflected from the user's skin by light irradiated from the grating coupler (530). The electronic device may control the light receiving unit (330) to detect light reflected from the user's skin. The electronic device may control the light receiving unit (330) to convert the reflected light into a photoelectric signal. The light input to the light receiving unit (330) may include not only light generated from the distributed feedback laser diode (501) and reflected from the user's skin, but also light input from the outside.

[0113] The light receiving unit (330) may include an optical filter. The optical filter may refer to a filter configured to pass light of a predetermined wavelength band. However, the light receiving unit (330) may also perform filtering on input light using signal processing in addition to the optical filter. For example, the electronic device may filter out signals of a wavelength band excluding the wavelength band of light generated by the distributed feedback laser diode (501) by passing a photoelectric signal converted from light input to the light receiving unit (330) through a band pass filter. The electronic device may obtain a light signal of the same wavelength band as the wavelength band of light generated by the distributed feedback laser diode (501) based on the optical filter or the band pass filter.

[0114] FIGS. 6A and 6B are drawings illustrating an optical body according to one embodiment.

[0115] An optical body according to FIG. 6a (e.g., optical body (320) of FIG. 3) may include a plurality of optical bodies. For example, the optical body may include an incident optical body (621) and a reflective optical body (622).

[0116] An optical body (e.g., an optical body (320) of FIG. 3) can control the direction of light (611) incident on a measurement site. For example, the incident optical body (621) can transmit light (611) generated and irradiated from a light source (e.g., a light source (310) of FIG. 3) to the user's skin. The surface of the incident optical body (621) onto which the light (611) irradiated from the light source (e.g., a light source (310) of FIG. 3) is incident on the incident optical body (621) can be formed in a flat shape. The surface of the incident optical body (621) onto which the light is irradiated on the user's skin can be formed in a convex shape. However, the shape of the incident optical body (621) described above is merely an example, and the shape of the incident optical body (621) may vary depending on an object onto which light is incident (e.g., a user's finger). As an example, the incident optical body (621) may have both sides convex or one side may be convex and the other side may be flat.

[0117] The incident optical body (621) may have a convex lens shape facing upward or downward. In one example, the incident optical body (621) may have a fly-eye shape. The fly-eye shape may refer to a shape in which a plurality of convex lenses are mutually combined.

[0118] The optical body may include a reflective optical body (622) at the center portion of the incident optical body (621). The reflective optical body (622) may transmit light (631) reflected from the user's skin to a light receiving unit (e.g., light receiving unit (330) of FIG. 3). The shape of the reflective optical body (622) may vary depending on the object on which the light is reflected (e.g., the user's finger). In one example, the reflective optical body (622) may have a convex shape on both sides, or one side may be convex and the other side may be flat.

[0119] The optical body according to Fig. 6b (e.g., the optical body (320) of Fig. 3) may not include a reflective optical body (622). The optical body includes a through hole (623), and the reflected light (631) may be incident on the light receiving unit through the through hole (623). The optical body according to Fig. 6b (e.g., the optical body (320) of Fig. 3) may include the same incident optical body (621) as Fig. 6a.

[0120] FIG. 7 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0121] The light source unit (e.g., the light source unit (310) of FIG. 3) may include a first distributed feedback laser diode array group (750), a second distributed feedback laser diode array group (760), an optical waveguide (720), and a grating coupler (730).

[0122] The first distributed feedback laser diode array group (750) may include a first distributed feedback laser diode array (711) and a second distributed feedback laser diode array (712). In FIG. 7, the first distributed feedback array laser diode group (750) is illustrated as including two distributed feedback laser diode arrays (the first distributed feedback array (711) and the second distributed feedback laser diode array (712)), but the first distributed feedback laser diode array group (750) may include three or more distributed feedback laser diode arrays.

[0123] The second distributed feedback laser diode array group (760) may include a third distributed feedback laser diode array (713) and a fourth distributed feedback laser diode array (714). In FIG. 7, the second distributed feedback laser diode array group (760) is illustrated as including two distributed feedback laser diode arrays (the third distributed feedback laser diode array (713) and the fourth distributed feedback laser diode array (714)), but the second distributed feedback laser diode array group (760) may include three or more distributed feedback laser diode arrays.

[0124] The distributed feedback laser diode array (e.g., the first distributed feedback laser diode array (711), the second distributed feedback laser diode array (712), the third distributed feedback laser diode array (713), and the fourth distributed feedback laser diode array (714)) illustrated in FIG. 7 can generate lights of a plurality of different wavelengths. The distributed feedback laser diode array (e.g., the first distributed feedback laser diode array (711), the second distributed feedback laser diode array (712), the third distributed feedback laser diode array (713), and the fourth distributed feedback laser diode array (714)) can include a plurality of distributed feedback laser diodes, and the plurality of distributed feedback laser diodes can each generate light of a set wavelength (band). For example, the first distributed feedback laser diode array (711) can generate light of a wavelength λ1 to λ n The second distributed feedback laser diode array (712) can generate light of wavelength λ. n+1 Inland λ 2n The third distributed feedback laser diode array (713) can generate light of wavelength λ. 2n+1 Inland λ 3n The fourth distributed feedback laser diode array (714) can generate light of wavelength λ. 3n+1 Inland λ4n 7 illustrates that each distributed feedback laser diode array (e.g., the first distributed feedback laser diode array (711), the second distributed feedback laser diode array (712), the third distributed feedback laser diode array (713), and the fourth distributed feedback laser diode array (714)) includes four distributed feedback laser diodes, but four is an exemplary number and is not limited thereto. Wavelength λ1 to λ 4n The light may be light corresponding to each of the wavelengths (bands) included in the blood glucose database. The distributed feedback laser diode may be manufactured and / or configured to generate light corresponding to each of the wavelengths (bands) included in the blood glucose database.

[0125] Each of the distributed feedback laser diode array groups (e.g., the first distributed feedback laser diode array group (750), the second distributed feedback laser diode array group (760)) may face each other with the grating coupler (730) as the center. For example, the first distributed feedback laser diode array group (750) and the second distributed feedback laser diode array group (760) may be arranged in the upper and lower directions of the grating coupler (730), respectively, when the optical body is viewed from above. For example, the first distributed feedback laser diode array group (750) and the second distributed feedback laser diode array group (760) may be arranged in the left and right directions of the grating coupler (730) when the optical body is viewed from above. The distributed feedback laser diode array groups (the first distributed feedback laser diode array group (750), the second distributed feedback laser diode array group (760)) are arranged in different directions within the light source unit (e.g., the light source unit (310) of FIG. 3), thereby preventing the temperature of each distributed feedback laser diode array group (the first distributed feedback laser diode array group (750), the second distributed feedback laser diode array group (760)) from changing due to heat generated therefrom.

[0126] A Mach-Zehnder interferometer (not shown) used for wavelength measurement may be placed in an area located to the left or right of the grating coupler (730), or in an area located on the optical path of the distributed feedback laser diode.

[0127] A temperature sensor (not shown) may be placed in an area located in the upper or lower direction of the grating coupler (730). The temperature sensor may be placed in each distributed feedback laser diode array group (the first distributed feedback laser diode array group (750), the second distributed feedback laser diode array group (760)). The temperature sensor may be placed in an area close to the distributed feedback laser diode array group (the first distributed feedback laser diode array group (750), the second distributed feedback laser diode array group (760)).

[0128] The light receiving unit (330) can be placed at the center of the grating coupler (730).

[0129] FIG. 8 is a drawing illustrating a light source and a light receiving unit of an electronic device according to one embodiment.

[0130] The light source unit (e.g., the light source unit (410) of FIG. 4) may include a distributed feedback laser diode array group (810), an optical waveguide (820), and a grating coupler (830).

[0131] The distributed feedback laser diode array group (810) may include a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)). The plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) may be arranged in one direction of the grating coupler (830) when the optical body is viewed from above. For example, a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) may be arranged in an upper direction of the grating coupler (830) when the optical body is viewed from above. For example, a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) may be arranged in a lower direction of the grating coupler (830) when the optical body is viewed from above.For example, a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) may be arranged on the left side of the grating coupler (830) when the optical body is viewed from above. For example, a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) may be arranged on the right side of the grating coupler (830) when the optical body is viewed from above.

[0132] The wavelength measurement sensor may be arranged in a direction different from the direction in which the plurality of distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) are arranged. For example, when the plurality of distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810) are arranged in an upward direction, the wavelength measurement sensor may be arranged in a downward direction. The wavelength measurement sensor may be arranged in an area located on an optical path of a distributed feedback laser diode laser diode.

[0133] A temperature sensor (not shown) may be disposed in an area close to the distributed feedback laser diode array group (810). The temperature sensor may be disposed in each of a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810). The temperature sensor may be disposed in an area close to each of a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810).

[0134] The optical waveguide (820) can be arranged opposite the optical output faces of a plurality of distributed feedback laser diode arrays (e.g., a first distributed feedback laser diode array (811), a second distributed feedback laser diode array (812), a third distributed feedback laser diode array (813), and a fourth distributed feedback laser diode array (814)) of the distributed feedback laser diode array group (810). Since the distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)) are arranged in the same direction of the grating coupler (830), one optical waveguide (820) can be arranged opposite the optical output faces of the distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)). The optical waveguide of the present disclosure (e.g., the optical waveguide (520) of FIG. 5, the optical waveguide (820) of FIG. 8) can be made of a SiO2 or Si3N4 material.

[0135] The optical body of FIG. 8 may be subject to a temperature effect between the optical body and the distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)). However, the optical body according to FIG. 8 may be configured so that the distributed feedback laser diode arrays (e.g., the first distributed feedback laser diode array (811), the second distributed feedback laser diode array (812), the third distributed feedback laser diode array (813), and the fourth distributed feedback laser diode array (814)) are arranged in one direction, thereby increasing the mass production speed of the electronic device.

[0136] FIG. 9 is a flowchart of a method for setting up a blood sugar level database according to one embodiment.

[0137] 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.

[0138] According to one embodiment, steps 910 to 940 may be understood to be performed in a processor (e.g., processor (340) of FIG. 3) of an electronic device (e.g., electronic device (101) of FIG. 1, electronic device (300) of FIG. 3, electronic device (400) of FIG. 4).

[0139] The blood sugar level database may include information on blood sugar levels corresponding to the response gain of light of a specific wavelength, and the blood sugar level database may refer to blood sugar level information that an electronic device (e.g., the electronic device (101) of FIG. 1, the electronic device (300) of FIG. 3, and the electronic device (400) of FIG. 4) references to check the user's blood sugar level. The blood sugar level database may be a database that corresponds the response gain of light to blood sugar level information obtained in advance.

[0140] The blood glucose database may include information indicating the response gain corresponding to blood glucose level information at each of multiple wavelengths. For example, the blood glucose database may include the response gain of light of a specific wavelength corresponding to multiple blood glucose level intervals. The blood glucose database may include the response gain of light of multiple wavelengths corresponding to multiple blood glucose level intervals.

[0141] Below, we describe the process of setting up a blood sugar level database in the form of a look-up table.

[0142] At least one of steps (910, 920, 930, 940) of FIG. 9 may be performed by an external electronic device (e.g., the external electronic device (102, 104) of FIG. 1) and / or a server (e.g., the server (108) of FIG. 1). When the operation of FIG. 9 is performed by an external electronic device (e.g., the external electronic device (102, 104) of FIG. 1) or a server (e.g., the server (108) of FIG. 1), the electronic device (e.g., the electronic device (101) of FIG. 1, the electronic device (300) of FIG. 3, the electronic device (400) of FIG. 4)) may receive a blood glucose level database from the external electronic device (e.g., the external electronic device (102, 104) of FIG. 1) or the server (e.g., the server (108) of FIG. 1).

[0143] A method of setting up a blood sugar level database may include a step of obtaining blood sugar level information of a user at step 910.

[0144] The user's blood glucose level information may be obtained through methods other than the blood glucose measurement method performed by the electronic device of the present disclosure (e.g., invasive blood glucose measurement). The blood glucose level information obtained from the user in step 910 may be used on the premise of consent to use the blood glucose level information.

[0145] The user of step 910 may refer to the same person as the user of steps 920, 930, and 940 below. The blood sugar level database may be determined by combining blood sugar level information resulting from performing the operation of FIG. 9 on multiple users. The user of FIG. 9 may not match the user of the electronic device according to FIG. 10 (e.g., the electronic device (101) of FIG. 1, the electronic device (300) of FIG. 3, and the electronic device (400) of FIG. 4).

[0146] A method of establishing a blood glucose database may include irradiating a user with a plurality of wavelengths of light at step 920.

[0147] The irradiating light composed of multiple wavelengths may refer to light of multiple wavelengths composed of different wavelengths. The irradiating light of multiple wavelengths may be irradiated by a device identical to the distributed feedback laser diode of the electronic device of the present disclosure (e.g., the electronic device (101) of FIG. 1, the electronic device (300) of FIG. 3, and the electronic device (400) of FIG. 4).

[0148] Higher blood sugar levels can lead to increased water infiltration into the blood vessels. This increased water infiltration can increase the amount of light absorbed by the user. As the amount of light absorbed increases, the intensity of the reflected light can decrease.

[0149] The method of establishing a blood glucose level database may include, at step 930, calculating a response gain of each of the plurality of wavelengths of light.

[0150] The response gain of the irradiating light may refer to the ratio of the intensity of the irradiating light to the intensity of the reflected light reflected from the user. The intensity of the irradiating light may be a value measured when irradiating the irradiating light in step 920 or a value determined by a setting value for irradiating the irradiating light. The intensity of the reflected light may refer to a value measured based on the reflected light input to the photodiode.

[0151] The response gain of the light source can be determined by Equation 2. In Equation 2, G λ1 represents the response gain at wavelength λ1, Ir represents the amplitude of reflected light at wavelength λ1, and Io represents the amplitude of light generated by the distributed feedback laser diode at wavelength λ1.

[0152] [Equation 2]

[0153] G λ1 = -20log(Ir / Io)

[0154] The above mathematical equation (2) is merely an example to aid understanding, and embodiments of the present disclosure may not be limited thereto. For example, the above mathematical equation (2) may be modified, applied, or expanded in various ways.

[0155] The method of setting up a blood sugar level database may include a step of including blood sugar level information according to the response gain of each of the plurality of wavelengths of light in the blood sugar level database at step 940.

[0156] The response gain of the light irradiated at step 930 may be a response gain corresponding to the user's blood sugar level information obtained at step 910. For example, if the user's blood sugar level of 81-85 mg / dl is obtained at step 910 and the response gain of the light irradiated at λ1 is measured as 30 at step 930, the response gain of the light irradiated at λ1 (e.g., 30) may be a value corresponding to the blood sugar level information (e.g., 81-85 mg / dl).

[0157] Blood glucose level information corresponding to the response gain of the irradiated light by wavelength can be included in the blood glucose level database. For example, blood glucose level information (e.g., 81-85 mg / dl) corresponding to the response gain of λ1 (e.g., 30) can be included in the blood glucose level database. Blood glucose level information corresponding to the response gain of irradiated light of multiple wavelengths including λ1 can be included in the blood glucose level database.

[0158] Steps (910, 920, 930, 940) of FIG. 9 may be performed in response to the user's blood sugar level information obtained (e.g., the user's blood sugar level of step 910). For example, steps (910, 920, 930, 940) of FIG. 9 may be performed for each user's blood sugar level information (e.g., 81-85, 86-90, 91-95, 96-100). For example, the blood sugar level database, which is the result of performing the steps for each user's blood sugar level information (e.g., 81-85, 86-90, 91-95, 96-100), may be in the form of [Table 2].

[0159] Blood glucose wavelength λ1 response gain wavelength λ4 response gain 81-85304086-90405091-95506096-1006070

[0160] The wavelengths (e.g., wavelength λ1, wavelength λ4) included in the blood glucose level database may refer to some of the wavelengths corresponding to light of a specific wavelength irradiated on the user's skin during the process of setting the blood glucose level database. Some of the lights irradiated on the user's skin may not cause a large change in blood glucose level according to a change in response gain. The blood glucose level database may not include lights that do not cause a large change in blood glucose level according to a change in response gain (e.g., lights whose change rate is less than a threshold value). The blood glucose level database may include information on lights that cause a large change in blood glucose level according to a change in response gain (e.g., lights whose change rate is greater than or equal to a threshold value). Fig. 10 is an operational flowchart of an electronic device according to one embodiment.

[0161] The operations described through FIG. 10 may be implemented based on instructions that may be stored in a computer recording medium or memory (e.g., memory (320) of FIG. 3). The illustrated method (FIG. 10) may be executed by an electronic device (e.g., electronic device (101) of FIG. 1, electronic device (300) of FIG. 3, electronic device (400) of FIG. 4) previously described through FIGS. 1 to 10, and the technical features described above will be omitted below. The order of each operation of FIG. 10 may be changed, some operations may be omitted, and some operations may be performed simultaneously.

[0162] According to one embodiment, operations 1010 to 1030 may be understood to be performed in a processor (e.g., processor (340) of FIG. 3) of an electronic device (e.g., electronic device (101) of FIG. 1, electronic device (300) of FIG. 3, electronic device (400) of FIG. 4).

[0163] An electronic device according to an embodiment can obtain, in operation 1010, the intensity of light of a specific wavelength irradiated to a user from a light source unit and the intensity of reflected light of a specific wavelength reflected from the user.

[0164] The electronic device may include a light source, an optical body, a light receiving unit, and a memory.

[0165] An electronic device may include a temperature sensor. The temperature sensor may include at least one thermistor. A temperature sensor may refer to a semiconductor device whose resistance changes depending on temperature. In the present disclosure, the temperature sensor may be disposed within a light source unit to measure the temperature of a distributed feedback laser diode. Measuring the temperature of the distributed feedback laser diode may include measuring the temperature of a surrounding area of ​​the distributed feedback laser diode to measure the temperature of the distributed feedback laser diode. For example, the operation of measuring the temperature of the DFB array and / or the light source unit may refer to the operation of measuring the temperature of the distributed feedback laser diode.

[0166] The electronic device may include a wavelength measurement sensor. For example, the electronic device may include a wavelength measurement sensor based on a Mach-Zehnder interferometer that measures the degree to which the wavelength of light generated by a distributed feedback laser diode changes.

[0167] The electronic device can control a plurality of distributed feedback laser diodes to generate light corresponding to each of the plurality of wavelengths.

[0168] A distributed feedback laser diode may refer to a semiconductor manufactured to generate light. A distributed feedback laser diode may refer to a diode configured to output light of a specific frequency (or wavelength band). For example, a distributed feedback laser diode may be configured to have a side mode suppression ratio (SMSR) of approximately 30 dB or more between a peak mode and a mode with the second highest output power after the peak mode during operation. The peak mode may refer to a mode in which a distributed feedback laser diode is configured to output light of a specific frequency at the highest power.

[0169] A plurality of distributed feedback laser diodes may be configured to generate light of different wavelengths. The collection of light generated by the plurality of distributed feedback laser diodes may constitute a laser spectrum of multiple wavelengths. For example, the plurality of distributed feedback laser diodes may be configured to generate light of a wavelength (band) included in blood glucose level information. The electronic device may measure the user's blood glucose level based on light of a wavelength (band) included in the blood glucose level information generated by the plurality of distributed feedback laser diodes.

[0170] A distributed feedback laser diode can determine the wavelength of light output based on the current applied to the distributed feedback laser diode. In one example, the wavelength of light output from the distributed feedback laser diode can change as the current applied to the distributed feedback laser diode changes. The change in the wavelength of light generated by the distributed feedback laser diode according to the change in the applied current to the distributed feedback laser diode can be confirmed in advance.

[0171] A distributed feedback laser diode can determine the wavelength of light it outputs based on the temperature of the distributed feedback laser diode. As the temperature of the distributed feedback laser diode increases, the energy band gap of the distributed feedback laser diode can decrease. As the energy band gap of the distributed feedback laser diode decreases, the wavelength of light generated by the distributed feedback laser diode can become longer. The change in the wavelength of light generated by the distributed feedback laser diode according to the change in the temperature of the distributed feedback laser diode can be confirmed in advance.

[0172] A distributed feedback laser diode can have its emitted power determined based on the current applied to the distributed feedback laser diode. When a current exceeding a threshold current is applied to the distributed feedback laser diode, the emitted power of the distributed feedback laser diode can increase as the applied current increases. The threshold current can refer to the minimum current that must be applied to the distributed feedback laser diode to output light. A change in the emitted power generated by the distributed feedback laser diode can be confirmed in advance according to a change in the current applied to the distributed feedback laser diode.

[0173] A distributed feedback laser diode can determine the emitted power output based on the temperature of the distributed feedback laser diode. As the temperature of the distributed feedback laser diode increases, the energy band gap of the distributed feedback laser diode can decrease. As the energy band gap of the distributed feedback laser diode decreases, the threshold current of the distributed feedback laser diode can increase. Since the emitted power of the distributed feedback laser diode increases as the applied current increases when a current exceeding the threshold current is applied, the emitted power may decrease as the threshold current increases. A change in the emitted power generated by the distributed feedback laser diode according to a change in the temperature of the distributed feedback laser diode can be confirmed in advance.

[0174] The memory can store information related to a change in the wavelength (band) of a pre-identified distributed feedback laser diode. The information related to the change in the wavelength (band) can include a change in the wavelength according to a change in the temperature of the pre-identified distributed feedback laser diode and a change in the wavelength according to a change in the current applied to the pre-identified distributed feedback laser diode. The memory can store information related to a change in the emission power of the pre-identified distributed feedback laser diode. The information related to the change in the emission power can include a change in the emission power according to a change in the temperature of the pre-identified distributed feedback laser diode and a change in the emission power according to a change in the current applied to the pre-identified distributed feedback laser diode. For example, the memory can store the results of measuring the change in the emission power and the change in the wavelength (band) according to a change in the applied current and a change in the temperature at a temperature of 10°C to 40°C.

[0175] An electronic device can check (or calculate) a wavelength (bandwidth) of light output from a distributed feedback laser diode according to a temperature of the distributed feedback laser diode and a current applied to the distributed feedback laser diode. The electronic device can check (or calculate) the wavelength of light output from the distributed feedback laser diode based on information related to a change in the wavelength of the distributed feedback laser diode that is previously checked and stored in a memory. For example, the electronic device can check a change in wavelength according to the temperature and the applied current of the distributed feedback laser diode from the information related to the change in wavelength, and check (or calculate) the wavelength of light generated by the distributed feedback laser diode. The distributed feedback laser diode can be set to generate light of a specific wavelength during manufacture. The electronic device can check (or calculate) the wavelength of light generated by the distributed feedback laser diode based on the wavelength of light that the distributed feedback laser diode is set to generate during manufacture and the checked change in wavelength.

[0176] An electronic device can check (or calculate) the luminous power of a distributed feedback laser diode according to the temperature of the distributed feedback laser diode and the current applied to the distributed feedback laser diode. The electronic device can check (or calculate) the change in the luminous power output from the distributed feedback laser diode based on information related to the change in the luminous power of the distributed feedback laser diode that is previously confirmed and stored in a memory. For example, the electronic device can check the change in the luminous power of the distributed feedback laser diode according to the temperature and the applied current of the distributed feedback laser diode from the information related to the change in the luminous power, and check (or calculate) the luminous power of the distributed feedback laser diode. The distributed feedback laser diode can be set to have a luminous power that is set at the time of manufacture. The electronic device can check (or calculate) the luminous power generated by the distributed feedback laser diode based on the luminous power that the distributed feedback laser diode is set to have at the time of manufacture and the change in the confirmed luminous power.

[0177] An electronic device can change the wavelength and emission power of a distributed feedback laser diode by changing the current applied to the distributed feedback laser diode. The electronic device can control a wavelength measurement sensor to measure a change in the wavelength of light output from the distributed feedback laser diode. The electronic device can measure the emission power of the distributed feedback laser diode. The electronic device can control a temperature sensor to measure the temperature of the distributed feedback laser diode. The electronic device can change the current applied to the distributed feedback laser diode so that the distributed feedback laser diode has a specific wavelength (band) based on the wavelength (band), emission power, and temperature of the output light confirmed above. For example, the distributed feedback laser diode may generate light of a wavelength other than the wavelength of light that the distributed feedback laser diode is set to generate at the time of manufacturing due to a change in temperature. The electronic device can change the current applied to the distributed feedback laser diode so that the distributed feedback laser diode generates light of a wavelength (band) that the distributed feedback laser diode is set to generate.

[0178] The electronic device can change the current applied to the distributed feedback laser diode to generate light of a wavelength included in the blood glucose database. The electronic device can determine the user's blood glucose level based on the response gain of the light having a wavelength included in the blood glucose database.

[0179] The optical body may be configured to direct light generated by the distributed feedback laser diode onto the user's skin. The light generated by the distributed feedback laser diode may be incident on the user's skin through the optical body. For example, the user's skin may include, but is not limited to, the user's fingers, and may refer to any area on the user's body.

[0180] An electronic device may control a light receiving unit to detect light reflected from a user's skin. The electronic device may control the light receiving unit to convert the reflected light into a photoelectric signal. The light input to the light receiving unit may include not only light generated from a distributed feedback laser diode and reflected from the user's skin, but also light input from an external source. The light generated from the distributed feedback laser diode and reflected from the user's skin may be used to determine the user's blood sugar level, and the light input from an external source may interfere with the recognition of the light reflected from the user's skin.

[0181] The light receiving unit may include an optical filter. The optical filter may refer to a filter configured to pass light of a predetermined wavelength band. However, the light receiving unit may also perform filtering on input light using signal processing in addition to the optical filter. For example, the electronic device may filter out signals of a wavelength band excluding the wavelength band of light generated by the distributed feedback laser diode by passing a photoelectric signal converted from light input to the light receiving unit through a band pass filter. The electronic device may obtain a light signal of a wavelength band identical to the wavelength band of light generated by the distributed feedback laser diode based on the optical filter or the band pass filter.

[0182] An electronic device according to one embodiment can calculate a response gain of irradiated light of a specific wavelength band based on a ratio of the intensity of the irradiated light and the intensity of the reflected light, in operation 1020.

[0183] The electronic device can determine the response gain of the irradiating light based on the amplitude of the reflected light. The electronic device can check the amplitude of the reflected light received by the light receiving unit. The electronic device can determine the response gain of the irradiating light based on the amplitude of the reflected light and the amplitude of the light generated by the distributed feedback laser diode. The response gain of the irradiating light can be determined by Equation 3. In Equation 3, G λ1 represents the response gain at wavelength λ1, Ir represents the amplitude of reflected light at wavelength λ1, and Io represents the amplitude of light generated by the distributed feedback laser diode at wavelength λ1.

[0184] [Equation 3]

[0185] G λ1 = -20log(Ir / Io)

[0186] The above mathematical formula 3 is merely an example to aid understanding, and embodiments of the present disclosure may not be limited thereto. For example, the above mathematical formula 3 may be modified, applied, or expanded in various ways.

[0187] An electronic device according to one embodiment can, in operation 1030, determine a blood sugar level corresponding to the calculated response gain using a blood sugar level database including blood sugar level information corresponding to the response gain of the light of multiple wavelength bands.

[0188] An electronic device can determine a user's blood sugar level corresponding to the response gain of the light, based on a blood sugar level database. For example, the electronic device can check the blood sugar level corresponding to the response gain of the light from the blood sugar level database and determine the blood sugar level corresponding to the response gain of the light as the user's blood sugar level.

[0189] A blood glucose database may refer to information about a user's blood glucose level, previously identified and corresponding to the response gain of the light source. A blood glucose database may refer to information used by electronic devices to determine blood glucose levels. The blood glucose database may be configured for each user. The following describes the process of establishing a blood glucose database in the form of a lookup table.

[0190] A user's blood glucose level can be determined through blood glucose measurement (e.g., invasive blood glucose measurement). Light can be irradiated onto the user's skin. The response gain of the irradiated light can be determined. The user's blood glucose level corresponding to the response gain of the irradiated light can be stored in a blood glucose level database. The blood glucose level database can be stored according to the magnitude of the response gain of the irradiated light, and can be stored according to the wavelength (band) of light generated by a distributed feedback laser diode. The DFB array can include a plurality of distributed feedback laser diodes, and a blood glucose level database of light reflected from different (wavelength) bands generated by the plurality of distributed feedback laser diodes can be stored, respectively. For example, a blood glucose level database obtained according to wavelength (band) and response gain can be stored in the form of [Table 3].

[0191] Blood glucose wavelength λ1 response gain wavelength λ4 response gain 81-85304086-90405091-95506096-1006070

[0192] The wavelengths (e.g., wavelength λ1, wavelength λ4) included in the blood glucose level database may refer to some of the wavelength bands corresponding to light irradiated to the user's skin during the process of establishing the blood glucose level database. Some of the light irradiated to the user's skin may not significantly change the blood glucose level according to a change in response gain. The blood glucose level database may not include light (e.g., light having a change rate below a threshold value) that does not significantly change the blood glucose level according to a change in response gain. The blood glucose level database may include information on light (e.g., light having a change rate above a threshold value) that does significantly change the blood glucose level according to a change in response gain. The electronic device may control a distributed feedback laser diode to generate light in a wavelength band included in the blood glucose level database. According to one embodiment, the electronic device may include a light source unit that generates light in a plurality of wavelength bands. The electronic device may include an optical body that irradiates light in the plurality of wavelength bands to the user's skin. The electronic device may include a light receiving unit that detects light reflected from the user's skin by light in the plurality of wavelength bands. The electronic device may include a memory that stores at least one computer program including instructions. An electronic device may include at least one processor. The instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to obtain an intensity of light of a specific wavelength band irradiated to a user from the light source unit and an intensity of reflected light reflected from the user by the irradiated light of the specific wavelength band. The instructions may cause the electronic device to calculate a response gain of the irradiated light of the specific wavelength band based on a ratio of the intensity of the irradiated light and the intensity of the reflected light.The instructions may cause the electronic device to determine a blood glucose level corresponding to the calculated response gain using a blood glucose level database containing blood glucose level information corresponding to the response gain of each of the light sources of the plurality of wavelength bands.

[0193] According to one embodiment, the light source unit may include a plurality of distributed feedback (DFB) laser diode arrays including a plurality of distributed feedback (DFB) laser diodes. The light source unit may include a plurality of optical waveguides arranged in a direction facing each of the DFB laser diode arrays and onto which light generated from each of the DFB laser diode arrays is incident. The light source unit may include a grating coupler that diffracts a direction of light propagating through the optical waveguides into the optical body. The plurality of DFB arrays may be arranged at 90-degree intervals or 180-degree intervals with respect to the light receiving unit.

[0194] In an electronic device according to one embodiment, a light source unit may include a plurality of distributed feedback (DFB) laser diode arrays including a plurality of distributed feedback (DFB) laser diodes. The light source unit may include a plurality of optical waveguides arranged in a direction facing each of the DFB laser diode arrays, onto which light generated from each of the DFB laser diode arrays is incident. The light source unit may include a grating coupler that diffracts a direction of light propagating through the optical waveguides into the optical body. The plurality of DFB laser diode arrays may be arranged in one direction of the light receiving unit.

[0195] An electronic device according to one embodiment may include a temperature sensor. Instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to measure the temperature of the light source. The instructions may cause the electronic device to control the light source to irradiate light of a specific wavelength corresponding to the blood glucose level database by adjusting a current applied to the light source based on the temperature of the light source measured by the temperature sensor.

[0196] An electronic device according to one embodiment may include a wavelength measuring sensor that measures the wavelength of the irradiated light. The instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to determine a change in wavelength of irradiated light of a specific wavelength irradiated to a user from a light source unit. The instructions may cause the electronic device to control the light source unit to irradiate irradiated light of a wavelength corresponding to the blood glucose level database by adjusting a current applied to the light source unit based on the change in wavelength of the irradiated light.

[0197] In an electronic device according to one embodiment, the instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to determine an amount of change in the wavelength of the irradiated light according to the measured temperature. The instructions may cause the electronic device to determine a current applied to the light source unit such that the amount of change in the wavelength is less than a predetermined value. The instructions may cause the electronic device to apply the determined current to the light source unit.

[0198] In an electronic device according to one embodiment, a specific wavelength band of the irradiated light irradiated to the user from the light source unit may be a wavelength included in a plurality of wavelength bands included in the blood sugar level database.

[0199] An electronic device according to one embodiment may include a temperature sensor. The electronic device may include a wavelength measuring sensor that measures a wavelength of the irradiated light. The instructions may cause the electronic device to measure a temperature of the light source unit. The instructions may cause the electronic device to determine a change in wavelength of irradiated light of a specific wavelength band irradiated to a user from the light source unit. The instructions may cause the electronic device to correct a specific wavelength band irradiated to a user from the light source unit based on the change in wavelength. The instructions may cause the electronic device to determine a luminous power of the light source unit corresponding to the measured temperature and the corrected wavelength band based on data including a change in wavelength and luminous power according to a change in temperature and current. The instructions may cause the electronic device to determine the blood sugar level based on the luminous power of the light source unit and the corrected wavelength band.

[0200] In an electronic device according to one embodiment, the blood sugar level database may include blood sugar level information corresponding to response gains of light irradiated in a plurality of wavelength bands in which the amount of change in blood sugar level information according to the amount of change in response gain is greater than a predetermined value.

[0201] In an electronic device according to one embodiment, the blood sugar level database may be a database stored in a memory of the electronic device, verified by the electronic device from an external server, and / or received by the electronic device from the external server.

[0202] In an electronic device according to one embodiment, the instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to calculate a response gain of light emitted in a plurality of wavelength bands including the specific wavelength band. The instructions may cause the electronic device to determine blood glucose level information corresponding to each response gain of light emitted in the plurality of wavelength bands based on the blood glucose level database. The instructions may cause the electronic device to determine a user's blood glucose level based on the blood glucose level information.

[0203] In an electronic device according to one embodiment, the instructions, when individually or collectively executed by the at least one processor, may cause the electronic device to determine a user's blood sugar level based on at least one of an average value, a median value, a mode value, a minimum value, and / or a maximum value of blood sugar level information corresponding to each of the response gains of the irradiated lights of the plurality of wavelength bands.

[0204] In one embodiment, a method for setting a blood sugar level database of an electronic device may include a step of acquiring blood sugar level information of a user. The method for setting a blood sugar level database of an electronic device may include a step of irradiating a user with light of multiple wavelengths. The method may include a step of calculating a response gain of each of the light of multiple wavelengths corresponding to an intensity of the light of multiple wavelengths and an intensity of reflected light reflected from the user by the light of multiple wavelengths. The method for setting a blood sugar level database of an electronic device may include a step of storing blood sugar level information according to the response gain of each of the light of multiple wavelengths in the blood sugar level database.

[0205] According to one embodiment, a blood glucose measurement method of an electronic device may include an operation of obtaining an intensity of irradiated light of a specific wavelength band irradiated to a user from a light source unit and an intensity of reflected light reflected from the user by the irradiated light of the specific wavelength. The blood glucose measurement method of the electronic device may include an operation of calculating a response gain of irradiated light of the specific wavelength based on a ratio of the intensity of the irradiated light and the intensity of the reflected light. The blood glucose measurement method of the electronic device may include an operation of confirming a blood glucose level corresponding to the calculated response gain by using a blood glucose level database including blood glucose level information corresponding to the response gains of irradiated lights of multiple wavelengths.

[0206] A blood sugar measurement method of an electronic device may include an operation of controlling a temperature sensor to measure the temperature of a light source. The blood sugar measurement method of an electronic device may include an operation of controlling the light source to irradiate light of a specific wavelength corresponding to the blood sugar level database by adjusting a current applied to the light source based on the temperature of the light source measured by the temperature sensor.

[0207] A blood sugar measurement method of an electronic device may include an operation of checking the amount of change in the wavelength of light irradiated to a user from a light source unit. The blood sugar measurement method of an electronic device may include an operation of controlling the light source unit to irradiate light of a wavelength corresponding to the blood sugar level database by adjusting the current applied to the light source unit based on the amount of change in the wavelength of the irradiated light.

[0208] The blood glucose measurement method of an electronic device may include an operation using data including changes in wavelength and luminous power according to changes in temperature and current stored in a memory (350). The blood glucose measurement method of an electronic device may include an operation measuring the change in wavelength using a wavelength measurement sensor (e.g., a Mach-Zehnder interferometer). The electronic device may measure blood glucose levels based on the change in wavelength and luminous power.

[0209] The blood sugar measurement method of an electronic device may include an operation of checking the amount of change in the wavelength of the irradiated light according to the measured temperature. The blood sugar measurement method of an electronic device may include an operation of determining the current applied to the light source unit so that the amount of change in the wavelength is less than a predetermined value. The blood sugar measurement method of an electronic device may include an operation of applying the determined current to the light source unit.

[0210] In a blood sugar measurement method of an electronic device, a specific wavelength band of light irradiated to a user from a light source unit may be a wavelength included in a plurality of wavelength bands included in the blood sugar level database.

[0211] In a blood sugar measurement method of an electronic device, the blood sugar level database may include blood sugar level information corresponding to response gains of light irradiated in a plurality of wavelength bands in which the amount of change in blood sugar level information according to the amount of change in response gain is greater than a predetermined value.

[0212] In a blood sugar measurement method of an electronic device, the blood sugar level database may be a database stored in the memory of the electronic device or received by the electronic device from an external server.

[0213] The blood sugar measurement method of the electronic device may include an operation of calculating a response gain of irradiated lights of a plurality of wavelength bands including the specific wavelength band. The blood sugar measurement method of the electronic device may include an operation of checking blood sugar level information corresponding to each response gain of irradiated lights of the plurality of wavelength bands based on the blood sugar level database. The blood sugar measurement method of the electronic device may include an operation of determining a blood sugar level of the user based on the blood sugar level information corresponding to each response gain of irradiated lights of the plurality of wavelength bands.

[0214] Electronic devices according to 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 embodiments of this document are not limited to the aforementioned devices.

[0215] The various embodiments of this document and the terminology used herein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B, or C," "at least one of A, B, and C," and "at least one of A, B, or C" each include all possible combinations of the items listed together in that phrase. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0216] The term "module" as used in 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).

[0217] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more commands 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 command among the one or more commands 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 command called. The one or more commands 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.

[0218] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as a computer program product. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0219] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities. 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.

Claims

1. In electronic devices, A light source unit that generates light composed of multiple wavelengths; An optical body that irradiates light composed of the above multiple wavelengths onto the user's skin; A light receiving unit that detects light composed of the plurality of wavelengths reflected on the user's skin; A memory storing at least one computer program including instructions; and Contains at least one processor, The above instructions, when individually or collectively executed by the at least one processor, cause the electronic device to: Obtain the intensity of the irradiated light of a specific wavelength band irradiated to the user from the above light source unit and the intensity of the reflected light reflected from the user by the irradiated light of the specific wavelength band, Calculate the response gain of the irradiation light of the specific wavelength band based on the ratio of the intensity of the irradiation light and the intensity of the reflected light, An electronic device that uses a blood sugar level database containing blood sugar level information corresponding to the response gain of each of the light sources of multiple wavelength bands to confirm the blood sugar level corresponding to the calculated response gain.

2. In paragraph 1, the light source unit, A plurality of distributed feedback (DFB) laser diode arrays comprising a plurality of distributed feedback (DFB) laser diodes, A plurality of optical waveguides arranged in a direction facing each DFB laser diode array and into which light generated from each of the DFB laser diode arrays is incident, It includes a grating coupler that diffracts the direction of light transmitted through the optical waveguide to the optical body, An electronic device in which the above-described plurality of DFB laser diode arrays are arranged at 90-degree or 180-degree intervals with the light receiving unit as the center.

3. In paragraph 1, the light source unit, A plurality of distributed feedback (DFB) laser diode arrays comprising a plurality of distributed feedback (DFB) laser diodes, A plurality of optical waveguides arranged in a direction facing each DFB laser diode array and into which light generated from each of the DFB laser diode arrays is incident, It includes a grating coupler that diffracts the direction of light transmitted through the optical waveguide to the optical body, An electronic device in which the above plurality of DFB laser diode arrays are arranged in one direction of the light receiving unit.

4. In the first paragraph, the electronic device Includes a temperature sensor, The above instructions, when individually or collectively executed by the at least one processor, cause the electronic device to: Measure the temperature of the above light source, An electronic device that controls the light source unit to irradiate light of a specific wavelength band corresponding to the blood sugar level database by adjusting the current applied to the light source unit based on the temperature of the light source unit measured by the temperature sensor.

5. In the fourth paragraph, the electronic device, Including a wavelength measuring sensor that measures the wavelength of the above-mentioned light, The above instructions, when individually or collectively executed by the at least one processor, cause the electronic device to: Check the change in wavelength of the light of a specific wavelength band irradiated to the user from the light source, An electronic device that controls the light source unit to irradiate light of a wavelength corresponding to the blood sugar level database by adjusting the current applied to the light source unit based on the amount of change in the wavelength of the irradiation light.

6. In the fifth paragraph, when the instructions are individually or collectively executed by the at least one processor, the electronic device, Check the change in wavelength of the light according to the measured temperature, Determine the current applied to the light source so that the change in the wavelength is less than a predetermined value, An electronic device that applies the above-determined current to the light source unit 7. In paragraph 6, a specific wavelength band of the light irradiated to the user from the light source unit is An electronic device having a wavelength included in a plurality of wavelength bands included in the above blood glucose level database.

8. In the fourth paragraph, the electronic device, temperature sensor; Including a wavelength measuring sensor that measures the wavelength of the above-mentioned light, Measure the temperature of the above light source, Check the change in wavelength of the light of a specific wavelength band irradiated to the user from the light source, Based on the change in the above wavelength, the specific wavelength band irradiated to the user from the light source is corrected, Based on data including changes in wavelength and luminous power according to changes in temperature and current, the luminous power of the light source corresponding to the measured temperature and the corrected wavelength band is confirmed, and An electronic device that checks the blood sugar level based on the light emission power of the light source and the corrected wavelength band.

9. In paragraph 1, the blood sugar level database, An electronic device including blood sugar level information corresponding to the response gain of light of a plurality of wavelength bands in which the amount of change in blood sugar level information according to the amount of change in response gain is greater than a predetermined value.

10. In the first paragraph, when the instructions are individually or collectively executed by the at least one processor, the electronic device, Calculate the response gain of the light of a plurality of wavelength bands including the above specific wavelength band, Based on the above blood sugar level database, blood sugar level information corresponding to each response gain of the light of the plurality of wavelength bands is confirmed, An electronic device that determines a user's blood sugar level based on the above blood sugar level information.

11. In the 9th paragraph, the instructions, when individually or collectively executed by the at least one processor, cause the electronic device to: An electronic device that determines a user's blood sugar level based on at least one of an average value, a median value, a mode value, a minimum value, and / or a maximum value of blood sugar level information corresponding to each response gain of the light of the plurality of wavelengths.

12. In the method of setting up a blood sugar level database, A step of obtaining user's blood sugar level information; A step of irradiating a user with light of multiple wavelength bands; A step of calculating the response gain of each of the irradiation lights of the plurality of wavelength bands corresponding to the intensity of the irradiation lights of the plurality of wavelength bands and the intensity of the reflected light reflected from the user by the irradiation lights of the plurality of wavelength bands; and A method for setting a blood sugar level database, comprising a step of storing blood sugar level information according to the response gain of each of the light sources of the plurality of wavelength bands in the blood sugar level database.

13. In a method for measuring blood sugar levels in an electronic device, An operation of obtaining the intensity of light of a specific wavelength band irradiated to a user from a light source and the intensity of reflected light reflected from the user by light of the specific wavelength band; An operation of calculating a response gain of the irradiation light of the specific wavelength band based on the ratio of the intensity of the irradiation light and the intensity of the reflected light; and A blood glucose measurement method of an electronic device including an operation of checking a blood glucose level corresponding to the calculated response gain using a blood glucose level database including blood glucose level information corresponding to the response gain of light of multiple wavelength bands.

14. In the 13th paragraph, the blood sugar measurement method of the electronic device An operation of controlling a temperature sensor to measure the temperature of a light source; and A blood sugar measurement method of an electronic device, including an operation of controlling the light source unit to irradiate light of a specific wavelength band corresponding to the blood sugar level database by adjusting the current applied to the light source unit based on the temperature of the light source unit measured by the temperature sensor.

15. In the 14th paragraph, the blood sugar measurement method of the electronic device An action to check the amount of change in the wavelength of light irradiated to the user from the light source; A blood sugar measurement method of an electronic device, including an operation of controlling the light source unit to irradiate light of a wavelength corresponding to the blood sugar level database by adjusting the current applied to the light source unit based on the amount of change in the wavelength of the irradiation light.

16. In the 15th paragraph, the blood sugar measurement method of the electronic device, An operation of checking the change in wavelength of the above-mentioned irradiation light according to the above-mentioned measured temperature; An operation for determining a current applied to the light source unit so that the change in the wavelength is less than a predetermined value; and A blood sugar measurement method of an electronic device including an operation of applying the determined current to the light source unit.

17. In paragraph 16, a specific wavelength band of the light irradiated to the user from the light source unit is A blood sugar measurement method of an electronic device, wherein the wavelength is included in a plurality of wavelength bands included in the above blood sugar level database.

18. In paragraph 13, the blood sugar level database, A blood glucose measurement method of an electronic device including blood glucose level information corresponding to the response gain of light of a plurality of wavelength bands in which the amount of change in blood glucose level information according to the amount of change in response gain is greater than a predetermined value.

19. In the 13th paragraph, the blood sugar level database, A method for measuring blood sugar levels in an electronic device, the electronic device being a database stored in the memory of the electronic device or received by the electronic device from an external server.

20. In the 13th paragraph, the blood sugar measurement method of the electronic device, An operation of calculating the response gain of light of a plurality of wavelength bands including the above-mentioned specific wavelength band; An operation of checking blood sugar level information corresponding to each response gain of the light of the plurality of wavelength bands based on the blood sugar level database; A blood sugar measurement method of an electronic device, including an operation of determining a user's blood sugar level based on blood sugar level information corresponding to each response gain of the light of the plurality of wavelength bands.

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