Electronic device for blood glucose measurement using distributed feedback laser diode

Abstract

Disclosed is a non-invasive electronic device for blood glucose measurement using a laser array including a plurality of wavelength bands formed in a distributed feedback laser diode. The non-invasive electronic device for blood glucose measurement comprises: a light source unit for forming light including a plurality of wavelength bands; a light reflection unit for reflecting the light to change a travel path of the light to the vertical direction; and a light detection unit for receiving reflected light in which the light traveling after being reflected by the light reflection unit is incident on a user's skin and then reflected, and converting same into an electrical signal.

Description

Electronic device for measuring blood glucose using distributed feedback laser diode

[0001] The present disclosure relates to an electronic device for measuring blood glucose, and more particularly, to an electronic device for noninvasively measuring blood glucose using a distributed feedback laser diode.

[0002] Invasive blood glucose measurement methods involve collecting a blood sample from a specific body part and measuring blood glucose levels using a glucometer. Because invasive blood glucose measurement methods involve collecting a blood sample, they can cause damage to the user's skin.

[0003] Noninvasive blood glucose measurement methods refer to methods that measure blood glucose levels by irradiating the skin with light of a specific wavelength and analyzing the reflected light. Because noninvasive blood glucose measurement methods irradiate light and measure blood glucose levels based on the reflected light, they can measure the user's blood glucose level without damaging the skin. Noninvasive blood glucose measurement methods can be used when regular blood glucose monitoring is required.

[0004] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0005] The technical problem to be achieved by the present disclosure is to provide an electronic device capable of non-invasively measuring blood sugar levels in the body using a distributed feedback (DFB) laser diode.

[0006] 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 disclosure belongs from the description below.

[0007] The present disclosure, for achieving the above-described technical problem, provides a non-invasive blood glucose measurement device including a light source unit for forming light having a plurality of wavelength bands; a light reflector unit for converting a propagation path of the light into a vertical direction through reflection of the light; and a light detector unit for receiving the reflected light that is reflected when the light propagating through the light reflector is incident on the user's skin and is reflected, and converting the reflected light into an electrical signal.

[0008] According to the present disclosure described above, a light source is formed on a substrate, and light can be focused onto a light reflector through an optical waveguide formed on the substrate. The light reflector can redirect light traveling substantially parallel to the substrate into a substantially perpendicular direction. In addition, an optical system is provided so that the light can be focused onto the skin or fingers of a human body, and the path of the light can be changed. Accordingly, reflected light reflected from the skin is formed outside the path of the incident light, and can be incident onto a photodiode.

[0009] Through the above-described process, reflected light having multiple wavelength bands can contain blood sugar information and be converted into an electrical signal.

[0010] 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.

[0011] In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

[0012] Figure 1 is a flowchart illustrating a blood sugar level measurement method of an electronic device according to one embodiment.

[0013] FIG. 2 is a flowchart illustrating a method for setting reference data of the electronic device according to one embodiment.

[0014] FIG. 3 is a diagram illustrating a non-invasive blood glucose measurement electronic device according to one embodiment.

[0015] FIG. 4 is a cross-sectional view illustrating a DFB laser diode according to one embodiment.

[0016] FIG. 5 is a cross-sectional view illustrating a DFB laser array in which the DFB laser diodes of FIG. 4 are combined according to one embodiment.

[0017] FIG. 6 is a block diagram of a non-invasive blood glucose measurement electronic device according to one embodiment.

[0018] FIG. 7 is a diagram illustrating a non-invasive blood glucose measurement electronic device according to one embodiment.

[0019] FIG. 8 is a block diagram of an electronic device within a network environment according to various embodiments.

[0020] Hereinafter, with reference to the attached drawings, a blood glucose measuring electronic device according to an embodiment of the present disclosure will be described in detail.

[0021] In this disclosure, a distributed feedback (DFB) laser diode is used as a light source. A DFB laser diode has wavelength band stability, high output, and a relatively narrow linewidth, and outputs light in a single wavelength band, making it suitable as a light source for detecting blood sugar levels.

[0022] In the present disclosure, a plurality of DFB laser diodes can be combined to form a DFB laser array. That is, the DFB laser array is composed of a plurality of DFB laser diodes that form light of different wavelength bands, and the DFB laser array can generate a plurality of lights of different wavelength bands to irradiate light onto the skin of a human body.

[0023] At least some of the light detected can react to blood sugar levels within the skin. Accordingly, when the light reflected from the skin is measured using a photodiode, spectral changes can be identified. Based on these spectral changes in the measured light, blood sugar levels can be measured.

[0024] However, since the wavelength band and optical output of the DFB laser array change depending on the change in ambient temperature and the amount of current applied, it is necessary to measure the temperature change of the laser light source and adjust the optimal current applied to the laser light source to achieve the desired amount of light in order to control the wavelength band and optical output more accurately.

[0025] In the present disclosure, a look-up table can be utilized to derive current application conditions. For example, changes in optical output and wavelength band according to changes in applied current and temperature can be measured in a range of about 10°C to about 40°C. Using the changes in wavelength band and optical output as parameters, a correlation between temperature changes and changes in applied current can be derived. In the present disclosure, a table that organizes the correlation between temperature changes and changes in applied current is called a current look-up table. Using the current look-up table, the amount of applied current for each laser light source to obtain a specific wavelength band and optical output can be determined for the temperature and applied current when the laser light source irradiates light.

[0026] Additionally, temperature changes of the laser light source can be measured using a temperature sensor, and wavelength band changes of the laser light source can be measured using an interferometer-based sensor.

[0027] For example, a temperature sensor can be typically implemented as a thermistor. A thermistor is a sensor that utilizes the change in resistance of a material depending on temperature and can be used to detect the temperature of a circuit. However, temperature sensors may not be limited to this. For example, temperature sensors can be configured in various ways, such as thermocouples, resistance temperature detectors (RTDs), and infrared temperature sensors.

[0028] For example, an interferometer-based sensor can be implemented as a Mach-Zehnder interferometer-based sensor. A Mach-Zehnder interferometer-based sensor can precisely measure changes in the wavelength band of a laser by measuring the phase difference of the laser source. However, interferometer-based sensors may not be limited to this.

[0029] After light of a specific wavelength band is irradiated onto the skin, at least a portion of the reflected measurement light can be measured via a photodiode. The photodiode can output a photoelectric signal, which is an electrical signal corresponding to the incident measurement light. Since the photoelectric signal contains noise, it can be filtered. In the present disclosure, light reflected from the skin and blood can be received, converted into a photoelectric signal via a photodiode, and then filtered to pass only signals of a specific wavelength band. For example, signals of different frequencies can be filtered by modulating a light source and a photodiode at a certain frequency. In addition, the signal gain of the filtered specific wavelength band can be calculated. The user's blood sugar level can be measured using the calculated signal gain of the specific wavelength band.

[0030] Figure 1 is a flowchart illustrating a blood sugar level measurement method according to one embodiment.

[0031] In the following examples, the operations may be performed sequentially, but are not necessarily performed sequentially. For example, the order of the operations may be changed, and at least two operations may be performed in parallel.

[0032] According to one embodiment, S100 to S200 may be understood to be performed in a processor of an electronic device (e.g., processor (900) of FIG. 6).

[0033] According to one embodiment, the electronic device can set reference data (S100). The reference data is data used for blood sugar measurement.

[0034] The reference data can be formed by comparing the response gain of multiple wavelength bands of reflected light (measured light) using laser light calculated using the mathematical equation 1 described below with the user's known blood sugar level, and matching the response gain in a specific wavelength band with a large fluctuation with the blood sugar level. Here, the user's known blood sugar level refers to the user's blood sugar level measured using a blood sugar meter according to the prior art. That is, the reference data is provided in the form of a look-up table, and can represent the correlation between the user's actual known blood sugar level and the response gain in a specific wavelength band.

[0035] Setting of reference data can be done in various ways depending on the embodiment.

[0036] FIG. 2 is a flowchart for explaining the reference data setting step of FIG. 1 according to one embodiment.

[0037] In the following examples, the operations may be performed sequentially, but are not necessarily performed sequentially. For example, the order of the operations may be changed, and at least two operations may be performed in parallel.

[0038] According to one embodiment, S110 to S140 may be understood to be performed in a processor of an electronic device (e.g., processor (900) of FIG. 6).

[0039] According to one embodiment, an electronic device can determine a user's blood glucose level, which is already known (S110). The user's blood glucose level can be determined by measuring it in advance using an invasive device or other device, and the electronic device can determine the user's blood glucose level based on the user's input blood glucose level information. Alternatively, the electronic device can determine the user's blood glucose level by receiving blood glucose level information stored in another device. After determining the user's blood glucose level, the electronic device can irradiate light, for example, laser light, to the user's skin (S120). The electronic device can obtain a response gain from the reflected light (S130). For example, the electronic device can obtain a response gain from the reflected laser light reflected on the skin.

[0040] Because glucose exists in the body in extremely small amounts, it is difficult to directly target laser light to glucose via blood vessels. However, increased blood glucose levels can induce physiological changes in adjacent skin or muscle tissue. For example, changes in blood sugar levels can alter the fluid composition of skin tissue. These changes in skin fluid composition can alter the degree of scattering and absorption of light incident on the skin, thereby altering the characteristics of the reflected light reflected by the skin.

[0041] However, since the degree of physiological changes varies from user to user, the characteristics of reflected light may also exhibit subtle differences depending on the user. To address this, the present disclosure can perform a task of setting reference data for each user.

[0042] According to one embodiment, the operation of setting the reference data may include a step of determining the user's blood glucose level (S110), a step of irradiating laser light on the user's skin, for example, a body part such as a finger (S120), a step of obtaining a response gain from the reflected laser light by analyzing the response characteristics of the reflected laser light reflected from the laser light irradiated on the skin to obtain a response gain of a specific wavelength band (S130), and a step of deriving a correlation between the user's blood glucose level and the response gain of the reflected laser light to form a look-up table according to the response gain (S140).

[0043] For example, the laser light applied to the present disclosure has multiple wavelength band characteristics, and the response gain for a specific wavelength band λ1 within the reflected laser light is expressed by the following mathematical expression 1.

[0044] [Mathematical Formula 1]

[0045] G λ1 = -20log(Ir / Io)

[0046] 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.

[0047] In the above mathematical expression 1, G λ1 represents the response gain in wavelength band λ1, Ir represents the amplitude of reflected laser light in wavelength band λ1, and Io represents the reference amplitude of laser light in wavelength band λ1.

[0048] Additionally, if there is a significant fluctuation in response gain within a specific wavelength band, this can be interpreted as a change in moisture or body fluid within skin tissue, depending on the known blood sugar level. The specific wavelength band detected as described above can be used as an indicator for blood sugar measurement, and the response gain information can be stored and utilized as a lookup table.

[0049] An example of a look-up table related to the response gain for each formed wavelength band can be presented as shown in Table 1 below.

[0050] Response gain of blood glucose wavelength band λ1 Response gain of wavelength band λ4 81-85304086-90405091-95506096-1006070

[0051] The figures presented in Table 1 above are merely intended to aid understanding by those skilled in the art. As presented, when blood sugar levels are high, bodily fluids or moisture in the blood vessel area may infiltrate the blood vessel, increasing the absorption of laser light in a specific wavelength band. As a result, laser light may be scattered in the blood vessel area, or the amplitude of the reflected laser light may decrease. Through the above process, wavelength bands that are sensitive to blood sugar changes can be identified, and the response gain for each wavelength band can be set for each blood sugar level. This information can be stored in a look-up table.

[0052] Referring again to FIG. 1, the electronic device can perform individual blood sugar measurement (S200).

[0053] In one embodiment, an electronic device may irradiate a user's skin with laser light having multiple wavelength bands for blood sugar measurement. The user's measurement site may be a finger. Furthermore, the electronic device may measure the response gain of the reflected laser light reflected through the skin of the measurement site and compare it with a look-up table.

[0054] The electronic device can noninvasively measure the user's blood sugar by comparing the measured response gain with a stored lock-up table.

[0055] FIG. 3 is a diagram illustrating a non-invasive blood glucose measurement electronic device according to one embodiment.

[0056] Referring to FIG. 3, the non-invasive blood glucose measurement electronic device may include a light source unit (100), a light reflector unit (200), and a light detector unit (300).

[0057] According to one embodiment, the light source unit (100) can form laser light having multiple wavelength bands. A plurality of DFB laser diodes can be used to form the laser light, and wires can be connected to each of the DFB laser diodes. For the above operation, the light source unit (100) can include a DFB laser array (110), an optical waveguide (120), and wires (130).

[0058] According to one embodiment, the light source unit (100), the light reflector unit (200), and the light detector unit (300) may be accommodated in a housing (600). The housing (600) may form the exterior of the blood glucose measurement electronic device.

[0059] FIG. 4 is a cross-sectional view illustrating a DFB laser diode according to one embodiment.

[0060] Referring to FIG. 4, the DFB laser diode may include an n-type cladding layer (112), an active layer (113), a p-type cladding layer (115), and a contact layer (116) in the form of a compound semiconductor on a substrate (111).

[0061] A plurality of ridges (10r) can be formed by etching the surface of the contact layer (116). When a plurality of ridges (10r) are formed through etching, a ridge channel can be formed between two adjacent ridges (10r). Here, the ridge (10r) refers to a portion that protrudes upwardly and is formed by a portion of the p-type cladding layer (115) and a portion of the contact layer (116).

[0062] The ridge channel (10) may be etched to a depth that extends into the active layer (113). In one embodiment, the ridge channel (10) may be etched to a depth that extends to the upper portion of the active layer (113). In other words, the ridge channel (10) may not be etched to the inside of the active layer (113). The depth of the ridge channel (10) may be adjusted in consideration of the mode shape of the emitted light and in accordance with the structure of the optical waveguide. Here, the mode shape of the light refers to the distribution shape of the intensity of the light in a plane perpendicular to the light emitted by the DFB laser diode.

[0063] A diffraction grating layer (114) may be formed at the bottom of the ridge channel (10). The diffraction grating layer (114) may have a function of allowing light (laser light) emitted from the active layer (113) to emit only a specific wavelength due to a change in refractive index caused by the grating period. That is, the diffraction grating layer (114) may be formed to control the wavelength band of the light emitted from the active layer (113). Here, the wavelength band of the light may include a specific wavelength (or representative wavelength) and a certain band of wavelengths centered on the specific wavelength.

[0064] The diffraction grating layer (114) may be formed in a grating shape so as to diffract light. Therefore, only light of a specific wavelength band may pass through the diffraction grating layer (114). In other words, the wavelength band of light may be controlled by the diffraction grating layer (114). For example, the wavelength band of light that may pass through the diffraction grating layer (114) may be changed depending on the pitch of the plurality of gratings (or the plurality of slits) forming the diffraction grating layer (114).

[0065] A protruding ridge (10r) may be formed between two ridge channels (10). An anode (118) may be formed on the ridge (10r).

[0066] The cathode (117) may be formed on the back surface of the substrate (111). For example, after forming the anode (118), the back surface of the substrate (111) may be polished, and then the cathode (117) may be formed on the back surface of the substrate (111). The polishing may be performed to remove scratches that occur when processing the back surface of the substrate (111) to reduce the thickness of the substrate (111). For example, the polishing may be performed by chemical mechanical polishing (CMP).

[0067] The anode (118) may be formed on the upper portion of the ridge (10r). After the process of forming the ridge channel (10) and forming the diffraction grating layer (114) is completed, an insulating film (119) made of, for example, SiO2 or Si3N4 may be formed, and the insulating film (119) on the upper surface of the ridge (10r) may be etched to open a portion of the upper surface of the ridge (10r). A metal material may be deposited on a portion of the upper surface of the opened ridge (10r) to form the anode (118). The anode (118) may be formed to extend to the upper surface of the insulating film (119) formed on the inner surface of the adjacent ridge channel (10) and the upper surface of the insulating film (119) formed on the upper surface of the adjacent ridge (10r). By extending the anode (118) in this way, smooth contact with the anode (118) can be ensured when performing wire bonding or flip-chip processes in subsequent processes.

[0068] The active layer (113) may have a multi-quantum well structure. The multi-quantum well structure may include a plurality of quantum wells. Barriers may be formed between the plurality of quantum wells. Accordingly, the multi-quantum well may have a structure in which quantum wells and barriers are repeated. In particular, the wavelength band of light emitted by the DFB laser diode may be determined by the composition of the compound semiconductor forming the quantum well.

[0069] Among the various wavelength bands of light formed in the active layer (113), only light in the wavelength band corresponding to the pitch of the diffraction grating layer (114) can pass through the diffraction grating layer (114). Therefore, light in a specific wavelength band passing through the diffraction grating layer (114) can form distributed feedback laser light.

[0070] FIG. 5 is a cross-sectional view illustrating a DFB laser array in which the DFB laser diodes of FIG. 4 are combined according to one embodiment.

[0071] Referring to FIG. 5, a DFB laser array (110) may include a plurality of DFB laser diodes (11, 12, 13). The pitches of the diffraction grating layers (114a, 114b, 114c) formed under the ridge channels (11a, 12a, 13a) of the plurality of DFB laser diodes (11, 12, 13) may be different from each other. Accordingly, the plurality of DFB laser diodes (11, 12, 13) may emit laser light of different wavelength bands. In addition, anodes (118a, 118b, 118c) may be individually formed on the plurality of DFB laser diodes (11, 12, 13). The plurality of DFB laser diodes (11, 12, 13) may share an n-type cladding layer (112) and an active layer (113). In addition, depending on the embodiment, the p-type cladding layer (115) may be mutually separated in the process of forming the ridge channels (11a, 12a, 13a) of the plurality of DFB laser diodes (11, 12, 13). Alternatively, the plurality of DFB laser diodes (11, 12, 13) may share the p-type cladding layer (115). For example, a plurality of anodes (118) corresponding to a plurality of ridges (10r) are formed in the plurality of DFB laser diodes (11, 12, 13), and since the n-type cladding layer (112) is commonly used, a single cathode (117) may be formed.

[0072] In Fig. 5, a plurality of DFB laser diodes (11, 12, 13) may have a plurality of anodes (118a, 118b, 118c) and a common cathode (117). The common cathode (117) may be connected to ground.

[0073] According to one embodiment, an optical waveguide (120) may be connected to a plurality of DFB laser diodes (11, 12, 13) of a DFB laser array (110). The optical waveguide (120) is provided for each of the DFB laser diodes, and laser light oscillating in the active layer may be incident on the optical waveguide (120).

[0074] For example, the optical waveguide (120) may include a core and a clad surrounding the core. For example, the optical waveguide may be formed of SiN4, and the clad may be formed of SiO2. Laser light oscillating in the active layer may be incident on the core of the optical waveguide (120). For example, the optical waveguide (120) may be formed on a substrate (111). According to one embodiment, the optical waveguide (120) may form a photonic integrated circuit (PIC) together with DFB laser diodes.

[0075] Through the above structure, laser light of different wavelength bands generated from DFB laser diodes can be emitted outside the light source unit (100).

[0076] By using multiple optical waveguides (120), multiple laser lights emitted from multiple DFB laser diodes of a DFB laser array (110) can be collected into a smaller area than the multiple DFB laser diodes.

[0077] According to one embodiment, a plurality of wires (130) connected to anodes are formed on one side of a DFB laser array (110). Through current supplied to the plurality of wires (130), a plurality of DFB laser diodes of the DFB laser array (110) are individually driven, and the output of the formed laser light can be controlled.

[0078] According to one embodiment, laser light including a plurality of wavelength bands supplied through a plurality of optical waveguides (120) of a light source unit (100) may be incident on a light reflection unit (200). The light reflection unit (200) may be formed to change the propagation direction of the laser light. For example, the light reflection unit (200) may be a mirror or a prism. For example, light incident horizontally toward the light reflection unit (200) may have its propagation direction changed to a vertical direction at the light reflection unit (200).

[0079] According to one embodiment, the light reflecting portion (200) may be surface treated to reflect incident laser light.

[0080] For example, a metal film such as aluminum (Al) may be coated on the surface of the prism. Alternatively, a high refractive index thin film and a low refractive index thin film may be alternately laminated using a dielectric to form the surface of the light reflecting portion (200). For example, a low refractive index material (e.g., MgF2) or a high refractive index material (e.g., ZnS) may be used as the coating using the dielectric.

[0081] According to one embodiment, laser light traveling upward through the light reflector (200) may be incident on the user's skin and reflected on the user's skin to form reflected laser light. The reflected laser light may be incident on the light detection unit (300). The light detection unit (300) may be positioned at a different location from the light reflection unit (200) and may convert the incident reflected laser light into an electrical signal.

[0082] According to one embodiment, the light detection unit (300) may include a photodiode. The photodiode may receive reflected laser light and convert it into an electrical signal. The electrical signal may include various wavelength bands. Accordingly, in a subsequent step, the electrical signal formed by the photodiode may be demodulated for each specific wavelength band, and a response gain may be obtained through the intensity of the demodulated signal.

[0083] According to one embodiment, a separate device may be provided to control the direction of the reflected laser light reflected through the user's skin during the above process. For example, a protective material (400) may be installed so that the user's finger can be fixed in a specific direction. For example, the protective material (400) may be installed in the housing (600). The protective material (400) may be a typical material that is transparent to both incident laser light and incident reflected laser light. For example, the protective material (400) may be formed of a transparent material through which laser light can pass.

[0084] According to one embodiment, the protective material (400) may be arranged at a certain angle with respect to the lower surface (601) of the housing (600) and in a slanted shape. This allows the reflected laser light reflected by the user's skin to travel along a different path from the path of the laser light traveling from the light reflection unit (200). Accordingly, the phenomenon of the reflected laser light being re-incident to the light reflection unit (200) and re-incident to the DFB laser array (110) can be prevented.

[0085] FIG. 6 is a block diagram of a non-invasive blood glucose measurement electronic device according to one embodiment of the present disclosure.

[0086] Referring to FIG. 6, a non-invasive blood glucose measurement electronic device according to an embodiment of the present disclosure may include a processor (900), a memory (910), a light source unit (100), a light detection unit (300), and a power supply unit (920).

[0087] According to one embodiment, the processor (900) can measure the user's blood sugar level by controlling the light source unit (100) and the light detection unit (300). For example, the processor (900) can control the light source unit (100) to emit laser light including multiple wavelength bands. The laser light emitted from the light source unit (100) can be reflected by a measurement target, such as the user's finger, and incident on the light detection unit (300).

[0088] According to one embodiment, the light detection unit (300) can convert the incident reflected laser light into an electrical signal and transmit it to the processor (900).

[0089] According to one embodiment, the processor (900) may include a blood sugar determination unit (901). The blood sugar determination unit (901) may obtain a response gain of an electrical signal transmitted from the light detection unit (300). The blood sugar determination unit (901) may compare the response gain with a lookup table stored in the memory (910) to determine the user's blood sugar level. For example, the blood sugar determination unit (901) may be formed using software. The blood sugar determination unit (801) may be formed integrally with the processor (900) or may be formed separately.

[0090] A non-invasive blood glucose measurement electronic device according to an embodiment of the present disclosure may include one or more processors (900). The one or more processors (900) may include one or more of a central processing unit (CPU), a many integrated core (MIC), a field programmable gate array (FPGA), a digital signal processor (DSP), and a hardware accelerator. The one or more processors (900) may control any one or any combination of components of the blood glucose measurement device, or perform operations or data processing in relation to communication. The one or more processors (900) execute one or more programs stored in at least one memory (910).

[0091] According to one embodiment, the number of processors (900) may be one or more. For example, the processor (900) may have a multi-core processor structure such as a dual core, a quad core, or a hexa core.

[0092] According to one embodiment, the processor (900) can control the operations of the electronic device by executing instructions stored in the memory (910). For example, the processor (900) may correspond to a plurality of processors that collectively perform a plurality of operations by dividing them among the processors.

[0093] According to one embodiment, the memory (910) can store a look-up table. The memory (910) can store a look-up table formed in the reference data setting step of FIGS. 1 and 2. For example, the memory (910) can store a look-up table indicating a correlation between a known user's blood sugar level and reflected laser light.

[0094] According to one embodiment, the memory (910) is executed by the processor (900) and may include computer instructions that enable the processor (900) to perform its functions.

[0095] According to one embodiment, the power supply unit (920) may be configured to supply power to electronic components constituting the blood glucose measurement electronic device. For example, the power supply unit (920) may supply power to the processor (900), memory (910), light source unit (100), and light detection unit (300).

[0096] A non-invasive blood glucose measurement electronic device according to one embodiment of the present disclosure may include a current control unit (930) and a temperature sensor (932).

[0097] According to one embodiment, the temperature sensor (932) can measure the temperature around the blood glucose measurement electronic device and transmit an electrical signal containing temperature information to the processor (900). A thermistor can be used as the temperature sensor (932).

[0098] According to one embodiment, the current control unit (930) is formed to be able to control the amount of current supplied from the power supply unit (920) to the light source unit (100). The processor (900) can control the current control unit (930) in response to an electric signal input from a temperature sensor (932). For example, the processor (900) can control the current control unit (930) according to the ambient temperature of the blood glucose measurement electronic device to supply an optimal current corresponding to the ambient temperature to the light source unit (100).

[0099] At this time, the processor (900) can recognize the optimal current value according to temperature using the current look-up table stored in the memory (910).

[0100] A noninvasive blood glucose measurement electronic device according to one embodiment of the present disclosure may include a display (940).

[0101] According to one embodiment, the display (940) may be configured to display the blood sugar level measured by the processor (900). For example, the processor (900) may control the display (940) to display the user's measured blood sugar level on the display (940).

[0102] A non-invasive blood glucose measurement electronic device according to one embodiment of the present disclosure may include a communication unit (950).

[0103] According to one embodiment, the communication unit (950) may be wirelessly connected to an external device, such as a smartphone. For example, the processor (900) may control the communication unit (950) to transmit the measured blood sugar level of the user to the external device.

[0104] FIG. 7 is a diagram illustrating a non-invasive blood glucose measurement electronic device according to one embodiment.

[0105] Referring to FIG. 7, the blood glucose measurement device may include a light source unit (100), a light reflection unit (200), an optical system (500), and a light detection unit (300).

[0106] According to one embodiment, the configuration of the light source unit (100) is substantially the same as that described in FIG. 3. That is, it has a DFB laser array (110) composed of a plurality of DFB laser diodes, and the DFB laser array (110) can generate laser light including a plurality of wavelength bands. The generated laser light can travel to the light reflection unit (200) through the optical waveguide (120).

[0107] According to one embodiment, the light reflector (200) can change the path of the laser light in a substantially vertical direction.

[0108] According to one embodiment, light reflected substantially vertically from the light reflector (200) may be incident on the optical system (500). The optical system (500) is positioned above the light reflector (200) and may focus vertically traveling laser light onto the user's skin and focus reflected laser light reflected from the user's skin to transmit the focused laser light to the light detection unit (300).

[0109] According to one embodiment, the optical system (500) may include at least two lenses (510, 520). For example, the optical system (500) may include a first lens (510) and a second lens (520). The first lens (510) and the second lens (520) may have a shape in which their side surfaces are in contact with each other.

[0110] According to one embodiment, the first lens (510) can focus incident laser light and irradiate the focused laser light onto the user's skin. In addition, the second lens (520) can receive reflected laser light reflected from the user's skin. The reflected laser light can have a characteristic of spreading over a relatively wide range compared to the incident laser light. The second lens (520) can focus the reflected laser light and transmit the reflected laser light to the light detection unit (300) formed on the lower substrate.

[0111] According to one embodiment, the light detection unit (300) may include a photodiode. The photodiode may receive reflected laser light and convert it into an electrical signal. The electrical signal may have various wavelength bands. Therefore, in a subsequent step, the electrical signal formed by the photodiode may be demodulated for each specific wavelength band, and a response gain may be obtained through the intensity of the demodulated signal.

[0112] When the response gain for each wavelength band is investigated as in the example in Table 1 above, the blood sugar level allocated to or matched with the response gain of a specific wavelength can be confirmed.

[0113] In the present disclosure described above, a light source is formed on a silicon-based photonic integrated circuit, and light is focused on an optical reflector through an optical waveguide formed on the photonic integrated circuit. The optical reflector converts laser light traveling parallel to a substrate on which the photonic integrated circuit is implemented into a direction perpendicular to the substrate. In addition, an optical system is provided so that the laser light can be focused on the skin or fingers of a human body and changes the path of the laser light. Accordingly, reflected laser light reflected from the skin is formed outside the path of the incident laser light, and can be incident on a photodiode.

[0114] Through the above-described process, reflected laser light having multiple wavelength bands can contain blood sugar information and be converted into an electrical signal.

[0115] FIG. 8 is a block diagram of an electronic device (1001) within a network environment (1000) according to various embodiments.

[0116] Referring to FIG. 8, in a network environment (1000), an electronic device (1001) may communicate with an electronic device (1002) via a first network (1098) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (1004) or a server (1008) via a second network (1099) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (1001) may communicate with the electronic device (1004) via the server (1008). According to one embodiment, the electronic device (1001) may include a processor (1020), a memory (1030), an input module (1050), an audio output module (1055), a display module (1060), an audio module (1070), a sensor module (1076), an interface (1077), a connection terminal (1078), a haptic module (1079), a camera module (1080), a power management module (1088), a battery (1089), a communication module (1090), a subscriber identification module (1096), or an antenna module (1097). In some embodiments, the electronic device (1001) may omit at least one of these components (e.g., the connection terminal (1078)), or may have one or more other components added. In some embodiments, some of these components (e.g., sensor module (1076), camera module (1080), or antenna module (1097)) may be integrated into a single component (e.g., display module (1060)).

[0117] The processor (1020) may control at least one other component (e.g., hardware or software component) of the electronic device (1001) connected to the processor (1020) by executing, for example, software (e.g., program (1040)), and may perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (1020) may store commands or data received from other components (e.g., sensor module (1076) or communication module (1090)) in volatile memory (1032), process the commands or data stored in volatile memory (1032), and store result data in non-volatile memory (1034). According to one embodiment, the processor (1020) may include a main processor (1021) (e.g., a central processing unit or an application processor) or an auxiliary processor (1023) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (1021). For example, when the electronic device (1001) includes the main processor (1021) and the auxiliary processor (1023), the auxiliary processor (1023) may be configured to use less power than the main processor (1021) or to be specialized for a given function. The auxiliary processor (1023) may be implemented separately from the main processor (1021) or as a part thereof.

[0118] The auxiliary processor (1023) may control at least a portion of functions or states associated with at least one component (e.g., the display module (1060), the sensor module (1076), or the communication module (1090)) of the electronic device (1001), for example, on behalf of the main processor (1021) while the main processor (1021) is in an inactive (e.g., sleep) state, or together with the main processor (1021) while the main processor (1021) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (1023) (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 (1080) or a communication module (1090)). In one embodiment, the auxiliary processor (1023) (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 (1001) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (1008)). 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.

[0119] The memory (1030) can store various data used by at least one component (e.g., the processor (1020) or the sensor module (1076)) of the electronic device (1001). The data can include, for example, software (e.g., the program (1040)) and input data or output data for commands related thereto. The memory (1030) can include volatile memory (1032) or non-volatile memory (1034).

[0120] The program (1040) may be stored as software in memory (1030) and may include, for example, an operating system (1042), middleware (1044), or an application (1046).

[0121] The input module (1050) can receive commands or data to be used in a component of the electronic device (1001) (e.g., a processor (1020)) from an external source (e.g., a user) of the electronic device (1001). The input module (1050) 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).

[0122] The audio output module (1055) can output audio signals to the outside of the electronic device (1001). The audio output module (1055) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0123] The display module (1060) can visually provide information to an external party (e.g., a user) of the electronic device (1001). The display module (1060) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (1060) 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.

[0124] The audio module (1070) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (1070) can acquire sound through the input module (1050), output sound through the sound output module (1055), or an external electronic device (e.g., electronic device (1002)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (1001).

[0125] The sensor module (1076) can detect the operating status (e.g., power or temperature) of the electronic device (1001) 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 (1076) 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.

[0126] The interface (1077) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (1001) to an external electronic device (e.g., the electronic device (1002)). In one embodiment, the interface (1077) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0127] The connection terminal (1078) may include a connector through which the electronic device (1001) may be physically connected to an external electronic device (e.g., the electronic device (1002)). According to one embodiment, the connection terminal (1078) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0128] The haptic module (1079) 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 (1079) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0129] The camera module (1080) can capture still images and videos. According to one embodiment, the camera module (1080) may include one or more lenses, image sensors, image signal processors, or flashes.

[0130] The power management module (1088) can manage power supplied to the electronic device (1001). According to one embodiment, the power management module (1088) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0131] A battery (1089) may power at least one component of the electronic device (1001). In one embodiment, the battery (1089) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0132] The communication module (1090) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (1001) and an external electronic device (e.g., electronic device (1002), electronic device (1004), or server (1008)), and the performance of communication through the established communication channel. The communication module (1090) may operate independently from the processor (1020) (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 (1090) may include a wireless communication module (1092) (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 (1094) (e.g., a local area network (LAN) communication module, or a power line communication module). Any of these communication modules may communicate with an external electronic device (1004) via a first network (1098) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (1099) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may 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 (1092) may use subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (1096) to verify or authenticate the electronic device (1001) within a communication network such as the first network (1098) or the second network (1099).

[0133] The wireless communication module (1092) 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 (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (1092) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (1092) may 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 (1092) may support various requirements specified in the electronic device (1001), an external electronic device (e.g., the electronic device (1004)), or a network system (e.g., the second network (1099)). According to one embodiment, the wireless communication module (1092) may support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0134] The antenna module (1097) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). According to one embodiment, the antenna module (1097) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (1097) 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 (1098) or the second network (1099), may be selected from the plurality of antennas, for example, by the communication module (1090). A signal or power may be transmitted or received between the communication module (1090) and an external electronic device via the selected at least one antenna. According to some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (1097).

[0135] According to various embodiments, the antenna module (1097) 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.

[0136] 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)).

[0137] According to one embodiment, commands or data may be transmitted or received between the electronic device (1001) and an external electronic device (1004) via a server (1008) connected to a second network (1099). Each of the external electronic devices (1002 or 1004) may be the same or a different type of device as the electronic device (1001). According to one embodiment, all or part of the operations executed in the electronic device (1001) may be executed in one or more of the external electronic devices (1002, 1004, or 1008). For example, when the electronic device (1001) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (1001) may, instead of or in addition to executing the function or service on its own, 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 (1001). The electronic device (1001) 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 (1001) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (1004) may include an Internet of Things (IoT) device. The server (1008) may be an intelligent server utilizing machine learning and / or a neural network.According to one embodiment, an external electronic device (1004) or server (1008) may be included in the second network (1099). The electronic device (1001) may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0138] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments disclosed in this document are not limited to the aforementioned devices.

[0139] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0140] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0141] Various embodiments of the present document may be implemented as software (e.g., a program (1040)) including one or more instructions stored in a storage medium (e.g., an internal memory (1036) or an external memory (1038)) readable by a machine (e.g., an electronic device (1001)). For example, a processor (e.g., a processor (1020)) of the machine (e.g., an electronic device (1001)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0142] 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 between sellers and buyers as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)) or may be provided through an application store (e.g., Play Store). ™ ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0143] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

[0144] The processor (900), memory (910), power supply (920), display (940), and communication unit (950) of the non-invasive blood glucose measurement electronic device according to an embodiment of the present disclosure described with reference to FIGS. 1 to 7 may correspond to the processor (1020), memory (1030), battery (1089), display module (1060), and communication module (1090) of the electronic device (1001) of FIG. 8.

[0145] As described above, according to one embodiment, a non-invasive blood glucose measurement electronic device (e.g., the non-invasive blood glucose measurement electronic device of FIGS. 3 and 7) may include a light source unit (e.g., 100 of FIG. 3) for forming light including a plurality of wavelength bands, a light reflector unit (200 of FIG. 3) for reflecting the light and converting the light's propagation path into a vertical direction, and a light detector unit (300 of FIG. 3) for receiving the reflected light reflected by the light reflector and incident on the user's skin and converting it into an electrical signal.

[0146] For example, the light source unit may include a DFB laser array (110 in FIG. 3) in which a plurality of DFB laser diodes are combined to form the light, a plurality of optical waveguides (120 in FIG. 3) each connected to the DFB laser diodes, and wiring (130 in FIG. 3) for supplying current to the DFB laser diodes.

[0147] For example, the DFB laser diode may include an n-type cladding layer formed on a substrate, an active layer formed on the n-type cladding layer and performing a light-emitting operation, a p-type cladding layer formed on the active layer, and a ridge channel formed by etching the p-type cladding layer. The plurality of DFB laser diodes may determine an emission wavelength band by a period of a diffraction grating layer formed under the ridge channel.

[0148] For example, the plurality of DFB laser diodes may share the n-type cladding layer and the active layer.

[0149] For example, the light reflecting portion may have a prism, and the prism may be coated with a metal film or have an alternating laminated structure of a high refractive index thin film and a low refractive index thin film.

[0150] For example, the non-invasive blood glucose measurement device may further include a protective material (400 in FIG. 3) to enable the user's skin to be fixed in a specific direction.

[0151] For example, the paths of the light incident on the user's skin and the reflected light may be different from each other.

[0152] For example, a non-invasive blood glucose measurement device according to one embodiment may further include an optical system (500 in FIG. 7) disposed above the light reflecting portion, for focusing the light reflected from the light reflecting portion, and for transmitting the reflected light reflected from the user's skin to the light sensing portion.

[0153] For example, the optical system may include a first lens (510 in FIG. 7) for focusing the light and a second lens (520 in FIG. 7) for focusing the reflected light. The first lens and the second lens may have a shape in which their side surfaces are in contact with each other.

[0154] For example, the first lens and the second lens may have a lens shape in the direction in which the light propagates.

[0155] For example, the second lens can transmit the reflected light to the light detection unit.

[0156] For example, according to one embodiment, a non-invasive blood glucose measurement device may further include a processor (900 of FIG. 6) that controls the light source unit and the light detection unit to measure the user's blood glucose level.

[0157] For example, according to one embodiment, the non-invasive blood glucose measurement device may further include a memory (910 of FIG. 6) that stores a look-up table representing a correlation between the user's known blood glucose level and the reflected light.

Claims

1. A light source unit for forming light including multiple wavelength bands; A light reflector for reflecting the light and converting the light's propagation path into a vertical direction; and A non-invasive blood glucose measurement electronic device comprising a light detection unit for receiving the reflected light reflected by the light reflector and incident on the user's skin and converting the reflected light into an electrical signal.

2. In paragraph 1, The above light source A DFB laser array in which a plurality of DFB laser diodes are combined to form the above light; a plurality of optical waveguides each connected to the plurality of DFB laser diodes; and A non-invasive blood glucose measurement electronic device, characterized in that it includes wiring for supplying current to the plurality of DFB laser diodes.

3. In paragraph 2, Each of the above plurality of DFB laser diodes, n-type cladding layer formed on the substrate; An active layer formed on the n-type cladding layer and performing a light-emitting operation; a p-type cladding layer formed on the active layer; and A ridge channel formed by etching the above p-type cladding layer; A non-invasive blood glucose measurement electronic device, wherein the plurality of DFB laser diodes have an emission wavelength band determined by the period of a diffraction grating layer formed at the bottom of the ridge channel.

4. In paragraph 3, A non-invasive blood glucose measurement electronic device, characterized in that the plurality of DFB laser diodes share the n-type cladding layer and the active layer.

5. In paragraph 1, A non-invasive blood glucose measurement electronic device characterized in that the light reflecting portion has a prism, and the prism is coated with a metal film or has an alternating laminated structure of a high refractive index thin film and a low refractive index thin film.

6. In paragraph 1, A non-invasive blood glucose measurement electronic device further comprising a protective material that allows the user's skin to be fixed in a specific direction.

7. In paragraph 1, A non-invasive blood glucose measurement electronic device, characterized in that the paths of the light incident on the user's skin and the reflected light reflected from the user's skin are different from each other.

8. In paragraph 1, A non-invasive blood glucose measurement electronic device further comprising an optical system disposed above the light reflecting portion, configured to focus the light reflected from the light reflecting portion, and transmit the reflected light reflected from the user's skin to the light sensing portion.

9. In paragraph 8, The above optical system a first lens for focusing the light; and A non-invasive blood glucose measurement electronic device comprising a second lens for focusing the reflected light, wherein the first lens and the second lens have a shape in which their side surfaces are in contact with each other.

10. In paragraph 9, A non-invasive blood glucose measurement electronic device, characterized in that the first lens and the second lens have a lens shape in the direction of propagation of the light.

11. In paragraph 9, A non-invasive blood glucose measurement electronic device, characterized in that the second lens is formed to transmit the reflected light to the light detection unit.

12. In paragraph 1, A non-invasive blood sugar measurement electronic device further comprising a processor that controls the light source and the light detection unit to measure the user's blood sugar level.

13. In paragraph 12, A non-invasive blood glucose measurement electronic device further comprising a memory storing a look-up table indicating a correlation between the user's known blood glucose level and the reflected light.

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