Patent Description:
The disclosure relates to a wearable device and a method for guiding a measurement of a biological signal in the wearable device.

An electronic device may measure a user's biological signal using a sensor. The biological signal may include, for example, at least one of heart rate, oxygen saturation, blood pressure, and/or blood glucose. Because the biological signal may be serve as a health indicator, measurement may be required at regular intervals of time. For example, because the blood glucose may be predictably maximal at a set time after a meal (e.g., <NUM> minutes to <NUM> hours), and may be predictably minimal when there user has not eaten and the stomach is empty, the user of the electronic device may be required to measure blood glucose at a predetermined time following meal, or a longer predetermined time in which the user is predicted to have no food content in the stomach. In another example, when the blood pressure is equal to or higher than a critical value for a predetermined after an end of an exercise time (e.g., within <NUM> minutes), the incidence of stroke may increase. Therefore, the user may be required to measure blood pressure after terminating physical exercise. Document <CIT> discloses a biometric monitoring device may alert the user that they should check their blood glucose level based on data measured from sensors on the biometric monitoring device. Document <CIT> discloses a method and a system that monitors blood glucose levels to alert the user beforehand. More specifically, if the blood-glucose concentration is found to be outside the acceptable bounds, a warning signal is generated to alert the patient. The rate of change of blood-glucose concentration is calculated and a time by which blood-glucose concentration will be out of bounds is calculated based on the current blood-glucose concentration and the rate of change.

Methods for measuring a biological signal may vary. For example, an electronic device may measure the biological signal by collecting venous or capillary blood of a user, and/or measure the biological signal by an optical or electrical method, without blood collection.

A blood analyzer that collects the venous blood, or a self-monitoring blood glucose measurement device (SMBG) that collects the capillary blood may both accurately measure a biological signal (e.g., a blood glucose) from the blood of the user. However, because the blood collection process involves the discomfort of pain for a user, and the blood analyzer is typically not very portable, the continuous measurement of blood sugar can be limited or impeded.

When the electronic device includes a wearable device coupled to a body part of the user, the electronic device may continuously monitor the biological signal using a biometric information sensor, such as a photoplethysmogram (PPG) sensor. However, because of the limitations on a physical size of the wearable device, the measurement accuracy of the biometric information sensor in the wearable device may be lower than that of other comparable electronic devices (e.g., the blood analyzer or the self-monitoring blood glucose measurement).

Certain embodiments disclosed in the disclosure may provide a method for continuously monitoring the biological signal using the wearable device and for increasing the accuracy of the measurement.

Accordingly, aspects of the disclosure is to provide a wearable device and a method for guiding a measurement of a biological signal in the wearable device, as set out in the appended set of claims.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses certain embodiments of the disclosure.

In the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

Hereinafter, certain embodiments of the disclosure will be described with reference to accompanying drawings. Certain embodiments of the disclosure used herein are not intended to limit the disclosure to specific embodiments, and it should be understood that the embodiments include modificationand/or alternative on the corresponding embodiments described herein.

<FIG> is a block diagram illustrating an electronic device <NUM> in a network environment <NUM> according to certain embodiments.

Additionally or alternatively, the auxiliary processor <NUM> may be adapted to consume less power than the main processor <NUM>, or to be specific to a predetermined function.

The interface <NUM> may support one or more predetermined protocols to be used for the electronic device <NUM> to be coupled with the external electronic device (e.g., the electronic device <NUM>) directly (e.g., wiredly) or wirelessly.

According to an embodiment, the antenna module <NUM> may include an antenna including a radiating element implemented using a conductive material or a conductive pattern formed in or on a substrate (e.g., PCB).

<FIG> illustrates a block diagram <NUM> of the electronic device <NUM> and a biometric information sensor <NUM> according to certain embodiments.

Referring to <FIG>, the electronic device <NUM> may include at least one of the processor <NUM>, the sensor module <NUM>, the memory <NUM>, the communication module <NUM>, or the display device <NUM>. In the following, unless otherwise defined, a description of a component having the same reference numeral may be referenced by the description set forth above in connection with <FIG>. For convenience of explanation, redundant description is omitted. The components of the electronic device <NUM> illustrated in <FIG> are illustrative, and the electronic device <NUM> may not include some components illustrated in <FIG> or may further include components not illustrated in <FIG>.

According to certain embodiments, the processor <NUM> may be configured to be electrically or operatively coupled to other components (e.g., at least one of the sensor module <NUM>, the memory <NUM>, the communication module <NUM>, or the display device <NUM>) of the electronic device <NUM> and to control other components of the electronic device <NUM>. In following embodiments, an operation of the electronic device <NUM> may be referenced as an operation of the processor <NUM>.

According to certain embodiments, the memory <NUM> may be electrically connected to the processor <NUM> and may store at least one instruction that causes the processor <NUM> to perform various operations. In following embodiments, the operation of the processor <NUM> may be performed based on the instructions stored in the memory <NUM>.

According to certain embodiments, the display device <NUM> may include a display. According to an embodiment, the display may be configured to provide visual information to the user and receive user input (e.g., touch input). According to an embodiment, an indicator is configured to generate light having at least one wavelength via a front surface (e.g., a surface on which the display of the electronic device <NUM> is located) of a housing of the electronic device <NUM>. According to an embodiment, the display device <NUM> includes a plurality of pixels, and at least some of the plurality of pixels may be used as an emitter <NUM> of the sensor module <NUM>.

According to certain embodiments, the communication module <NUM> may be configured to communicate with an external electronic device (e.g., the electronic device <NUM>, the electronic device <NUM>, or the server <NUM> in <FIG>) via a network (e.g., the first network <NUM> and/or the second network <NUM> in <FIG>). According to an embodiment, the processor <NUM> may use the communication module <NUM> to transmit information associated with the electronic device <NUM> to the external electronic device. For example, the electronic device <NUM> may use the communication module <NUM> to transmit data sensed by the biometric information sensor <NUM> to an external electronic device.

According to certain embodiments, the sensor module <NUM> may include at least one sensor for sensing information associated with an ambient environment of the electronic device <NUM> and/or an external object (e.g., user or the like). According to an embodiment, the sensor module <NUM> may include at least one of the proximity sensor, the biometric information sensor <NUM>, or a motion sensor. For example, the proximity sensor may be located at the front surface of the housing of the electronic device <NUM> and may sense a presence of the external object located within a predetermined range from the proximity sensor. For example, the motion sensor may be located within the housing of the electronic device <NUM> and may include at least one sensor (gyro sensor and/or acceleration sensor, or the like) for sensing at least one of a posture, a tilt, or a movement of the electronic device <NUM>.

According to certain embodiments, the biometric information sensor <NUM> may include the emitter <NUM>, a receiver <NUM>, and/or a signal processor <NUM> (or a signal processing circuit). According to an embodiment, the processor <NUM> may use the biometric information sensor <NUM> to measure a biological signal (e.g., at least one of heart rate, oxygen saturation, blood pressure, or blood glucose) associated with the external object (e.g., user or the like). For example, the biometric information sensor <NUM> may include a photoplethysmogram (PPG) sensor.

According to certain embodiments, the emitter <NUM> may include at least one light emitting element (e.g., a light emitting diode, LED) for illuminating light of a wavelength within a predetermined range. According to an embodiment, the emitter <NUM> may include at least one light emitting element for emitting (or outputting) light having a wavelength within a predetermined range (e.g., <NUM> to <NUM>). According to an embodiment, the emitter <NUM> may include a plurality of light emitting elements for illuminating light-beams corresponding to a plurality of wavelengths. For example, the emitter <NUM> may include a plurality of light emitting elements respectively corresponding to red (wavelength: <NUM> to <NUM>), green (wavelength: <NUM> to <NUM>), blue (wavelength: <NUM> to <NUM>), and/or infrared ray (wavelength: <NUM> to <NUM>). In another example, the emitter <NUM> may include a spectrometer (spectrography) capable of selectively adjusting a wavelength. According to an embodiment, the emitter <NUM> may be implemented on the display device <NUM>. For example, at least a portion of the emitter <NUM> may be implemented using pixels or sub-pixels of the display device <NUM>.

According to certain embodiments, the receiver <NUM> may include at least one light receiving element for sensing light. According to an embodiment, the light receiving element may detect light of a predetermined wavelength and sense an intensity of the detected light. For example, the light receiving element may output a current signal having a magnitude corresponding to the intensity of the detected light. For example, the light receiving element may include a photo detector or a photo diode. The photo diode is an example of the photo detector, and the light receiving element of the disclosure may be any element capable of sensing the light. According to an embodiment, the receiver <NUM> may include at least one photo detector (e.g., photo diode) for sensing light having a wavelength within at least a predetermined range (e.g., <NUM> to <NUM> µm). According to an embodiment, the receiver <NUM> may include a plurality of light receiving elements for sensing light-beams corresponding to a plurality of wavelengths. For example, the receiver <NUM> may include a plurality of photo detectors configured to detect light-beams corresponding to red, green, blue, and/or infrared ray, respectively.

According to certain embodiments, the signal processor <NUM> may control the emitter <NUM> and the receiver <NUM>. For example, the signal processor <NUM> may control the emitter <NUM> and/or the receiver <NUM> under a control of the processor <NUM>. According to an embodiment, the signal processor <NUM> may drive at least one LED of the emitter <NUM>. According to an embodiment, the signal processor <NUM> may process a signal sensed by the receiver <NUM>. For example, the signal processor <NUM> may convert a current signal sensed by the receiver <NUM> into a voltage signal, process (e.g., amplify and/or filter) the voltage signal, and convert the processed voltage signal into a digital signal. According to an embodiment, the signal processor <NUM> may include a memory for storing biometric information sensed by the receiver <NUM> and/or instructions for controlling the receiver <NUM> and the emitter <NUM>. According to an embodiment, the processor <NUM> may perform post processing (e.g., filtering and/or noise cancellation) on the biometric information sensed by the biometric information sensor <NUM>.

According to certain embodiments, the biometric information sensor <NUM> may illuminate light one surface (e.g., rear surface or front surface) of the electronic device <NUM> and receive (e.g., sense or detect) the light reflected from the external object (e.g., user). For example, the biometric information sensor <NUM> may sense the light or output the light via a window having a light-transmitting property formed on at least a portion of the housing of the electronic device <NUM>.

<FIG> is a perspective view of a front face of the electronic device <NUM> according to an embodiment. Further, <FIG> is a perspective view of a rear face of the electronic device <NUM>.

Referring to <FIG> and <FIG>, the electronic device <NUM> according to an embodiment may include a housing <NUM> including a first surface (or front face) 310A, a second surface (or rear surface) 310B, and a side surface 310C surrounding a space between the first surface 310A and the second surface 310B, and attachment members <NUM> and <NUM> connected to at least a portion of the housing <NUM> and configured to detachably attach the electronic device <NUM> to a body part (e.g., a wrist, an ankle, or the like) of the user. In another embodiment (not shown), the housing may refer to a structure forming some of the first surface 310A, the second surface <NUM>10B, and the side surface 310C in <FIG>. According to an embodiment, the first surface 310A may be formed by a front surface plate <NUM> (e.g., a glass plate or a polymer plate including a variety of coating layers) having at least a portion substantially transparent. The second surface 310B may be formed by a substantially opaque rear surface plate <NUM>. A rear surface plate <NUM> may be formed, for example, by a coated or colored glass, a ceramic, a polymer, a metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the above materials. The side surface 310C is formed by a side surface bezel structure (or a "side surface member") <NUM> that is coupled to the front surface plate <NUM> and the rear surface plate <NUM> and contains a metal and/or a polymer. In some embodiments, the rear surface plate <NUM> and the side surface bezel structure <NUM> may be integrally formed and contain the same material (e.g., a metal material such as aluminum). The attachment member <NUM> and <NUM> may be formed of various materials and shapes. By a woven material, a leather, a rubber, a urethane, a metal, a ceramic, or a combination of at least two of the above-mentioned materials, an integrated unit link may be formed or a plurality of unit links may be formed to be movable to each other.

According to an embodiment, the electronic device <NUM> may include at least one of a display (e.g., <NUM> in <FIG> or at least a portion of the display device <NUM>), an audio module disposed in microphone holes <NUM> and/or <NUM> (e.g., at least a portion of the display device <NUM> in <FIG>), the sensor module <NUM>, a key input device <NUM>, <NUM>, and <NUM>, or a connector hole <NUM>. In some embodiments, the electronic device <NUM> may omit at least one of the components (e.g., the key input device <NUM>, <NUM>, and <NUM>, the connector hole <NUM>, or the sensor module <NUM>) or may further include another component.

The display <NUM> may be exposed through a substantial portion of the front surface plate <NUM>, for example. A shape of the display <NUM> may be a shape corresponding to a shape of the front surface plate <NUM>, and may be various shapes such as a circle, an ellipse, a polygon, or the like. The display <NUM> may be disposed to be coupled with or adjacent to a touch sensing circuit, a pressure sensor capable of measuring an intensity (pressure) of a touch, and/or a fingerprint sensor.

The audio module disposed in the microphone holes <NUM> and <NUM> may include the microphone hole <NUM> and the speaker hole <NUM>. The microphone hole <NUM> may include a microphone therein for acquiring an external sound. Further, in some embodiments, a plurality of microphones may be arranged in the microphone hole <NUM> to sense a direction of a sound. The speaker hole <NUM> may be used as an external speaker and a receiver for a call. In some embodiments, the speaker hole <NUM> and the microphone hole <NUM> may be implemented as a single hole, or a speaker (e.g., a piezo speaker) may be included without the speaker hole <NUM>.

The sensor module <NUM> may generate an electrical signal or data value corresponding to an internal operational state of the electronic device <NUM> or an external environmental condition. The sensor module <NUM> may include the biometric sensor module <NUM> (e.g., HRM sensor) disposed on the second surface 310B of the housing <NUM>, for example. The electronic device <NUM> may further include a sensor module (not shown), for example, at least one of a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

The key input device <NUM>, <NUM>, and <NUM> may include the wheel key <NUM> disposed on the first surface 310A of the housing <NUM> and rotatable in at least one direction, and/or the side key button <NUM> and <NUM> disposed on the side surface 310C of the housing <NUM>. The wheel key may be in a form corresponding to the shape of the front surface plate <NUM>. In another embodiment, the electronic device <NUM> may not include some or all of the above-mentioned key input device <NUM>, <NUM>, and <NUM>, and the non-included key input device <NUM>, <NUM>, and <NUM> may be implemented in another form, such as a soft key or the like. The connector hole <NUM> may receive therein a connector (e.g., a USB connector) for transmitting and receiving power and/or data with the external electronic device. Another connector hole (not shown) that may receive therein a connector for transmitting and receiving an audio signal with the external electronic device may be included. The electronic device <NUM> may further include, for example, a connector cover (not shown) for covering at least a portion of the connector hole <NUM> and blocking an entry of external foreign matter into the connector hole.

The attachment member <NUM> and <NUM> may be detachably attached to at least a portion of the housing <NUM> using locking members <NUM> and <NUM>. The attachment members <NUM> and <NUM> may include at least one of a fixing member <NUM>, a fixing member fastening hole <NUM>, a band guide member <NUM> and a band fixing ring <NUM>.

The fixing member <NUM> may be configured to fix the housing <NUM> and the attachment members <NUM> and <NUM> to the body part (e.g., the wrist, ankle, or the like) of the user. The fixing member fastening hole <NUM> may correspond to the fixing member <NUM> to fix the housing <NUM> and the attachment members <NUM> and <NUM> to the body part of the user. The band guide member <NUM> may be configured to limit a range of movement of the fixing member <NUM> when the fixing member <NUM> and the fixing member fastening hole <NUM> are fastened with each other. Therefore, the attachment members <NUM> and <NUM> may be closely attached to the body part of the user. The band fixing ring <NUM> may limit a range of movement of the attachment members <NUM> and <NUM> while in a state in which the fixing member <NUM> and the fixing member fastening hole <NUM> are fastened with each other.

<FIG> is an exploded perspective view of the electronic device <NUM>.

Referring to <FIG>, the electronic device <NUM> may include a side surface bezel structure <NUM>, a wheel key <NUM>, the front surface plate <NUM>, the display <NUM>, a first antenna <NUM>, a second antenna <NUM>, a support member <NUM> (e.g., a bracket), a battery <NUM>, a printed circuit board <NUM>, a sealing member <NUM>, a rear surface plate <NUM>, and attachment members <NUM> and <NUM>. At least one of the components of the electronic device <NUM> may be the same as or similar to at least one of the components of the electronic device <NUM> in <FIG> or <FIG>, and a redundant description thereof will be omitted below. The support member <NUM> may be disposed within the electronic device <NUM> and connected to the side surface bezel structure <NUM> or may be integrally formed with the side surface bezel structure <NUM>. The support member <NUM> may be formed of, for example, a metal material and/or a non-metal (e.g., a polymer) material. The display <NUM> may be coupled to one surface of the support member <NUM> and the printed circuit board <NUM> may be coupled to the other surface thereof. The printed circuit board <NUM> may be equipped with a processor, a memory, and/or an interface. The processor may include, for example, at least one of a central processing unit, an application processor, a graphic processing unit (GPU), an application processor sensor processor, or a communications processor.

The memory may include, for example, a volatile memory or a non-volatile memory. The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface may, for example, electrically or physically couple the electronic device <NUM> with the external electronic device and include a USB connector, an SD card/MMC connector, or an audio connector.

The battery <NUM> is a device for supplying power to at least one component of the electronic device <NUM>. The battery <NUM> may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery <NUM> may be disposed substantially coplanar with the printed circuit board <NUM>, for example. The battery <NUM> may be disposed integrally within the electronic device <NUM> and may be detachably disposed with the electronic device <NUM>.

The first antenna <NUM> may be disposed between the display <NUM> and the support member <NUM>. The first antenna <NUM> may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The first antenna <NUM> may, for example, be in short-range communication with the external device, wirelessly transmit and receive power utilized for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In another embodiment, an antenna structure may be formed by the side surface bezel structure <NUM> and/or a portion of the support member <NUM>, or a combination thereof.

The second antenna <NUM> may be disposed between the printed circuit board <NUM> and the rear surface plate <NUM>. The second antenna <NUM> may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The second antenna <NUM> may, for example, be in short-range communication with the external device, wirelessly transmit and receive power utilized for charging, and transmit a magnetic-based signal including a short-range communication signal or payment data. In another embodiment, an antenna structure may be formed by a portion of the side surface bezel structure <NUM> and/or a rear surface plate <NUM>, or a combination thereof.

The sealing member <NUM> may be positioned between the side surface bezel structure <NUM> and the rear surface plate <NUM>. The sealing member <NUM> may be configured to block moisture and foreign matter from entering a space surrounded by the side surface bezel structure <NUM> and the rear surface plate <NUM> from the outside.

<FIG> illustrates a mounting structure <NUM> of the biometric information sensor <NUM> of the electronic device <NUM> according to certain embodiments.

According to certain embodiments, an electronic device (e.g., the electronic device <NUM> in <FIG>) may include a front surface housing <NUM> and a rear surface housing <NUM>. For example, the front surface housing <NUM> and the rear surface housing <NUM> may correspond to the housing <NUM> in <FIG>. According to an embodiment, the display <NUM> (e.g., the display device <NUM> in <FIG>) may be exposed through one surface of the front surface housing <NUM>. The key input device <NUM>, <NUM>, and <NUM> may be located on at least a portion of the front surface housing <NUM>.

According to an embodiment, a biometric information sensor (e.g., the biometric information sensor <NUM> in <FIG>) may be located on one surface of the rear surface housing <NUM>. For example, a first structure <NUM> may be positioned between the biometric information sensor <NUM> and the rear surface housing <NUM>. The first structure <NUM> may be used to fix the biometric information sensor <NUM> to the rear surface housing <NUM>. The first structure <NUM> may be used to adjust a spacing between the biometric information sensor <NUM> and a cover glass <NUM>.

According to an embodiment, the biometric information sensor <NUM> may be configured to illuminate light through the cover glass <NUM> located on one surface of the rear surface housing <NUM> and receive the reflected light to acquire biometric information. For example, the cover glass <NUM> may be made of a light-transmitting material.

According to an embodiment, a second structure <NUM> may be positioned between the cover glass <NUM> and the rear surface housing <NUM>. For example, the second structure <NUM> may be used to protect elements of the biometric information sensor <NUM>. The second structure <NUM> may be made of a light-absorbing material or may have a light-absorbing color. The second structure <NUM> may be used to reduce noise due to light reflection. The second structure <NUM> may be used as a barrier structure. For example, the second structure <NUM> may be used for crosstalk reduction.

<FIG> illustrates graphs <NUM> and <NUM> illustrating blood glucose values according to certain embodiments.

Referring to <FIG>, a first graph <NUM> may represent blood glucose values measured by the electronic device <NUM>. Further, a second graph <NUM> may represent values of the blood glucose values of the first graph <NUM> calibrated based on blood glucose values measured by the external electronic device. A horizontal axis of the graphs <NUM> and <NUM> may represent a time (unit: hour: minute: second), and a vertical axis thereof may represent a blood glucose value (unit: mg/dL). In the first graph <NUM>, first blood glucose values <NUM> may represent values measured by the electronic device <NUM> and second blood glucose values <NUM> may represent values measured by the external electronic device.

According to an embodiment, the external electronic device may measure the blood glucose using the biometric information sensor <NUM> or a sensor other than the biometric information sensor <NUM>. The external electronic device may include, for example, at least one of a blood analyzer or a self-monitoring blood glucose measurement (SMBG) that measures the blood glucose through blood sampling. The external electronic device may perform the same or similar operation as an operation of at least one of a mobile device <NUM> or a measuring device <NUM> in <FIG> to be described below.

The blood glucose may be one of indicators of a user's health status. Information associated with the blood glucose may include, for example, at least one of a glucose tolerance, a glycemic index (GI), or a glycemic load (GL). The glucose tolerance is a measurement of glucose digestion or glucoregulation ability of the user. The glycemic index may indicate a speed of absorption of saccharinity after the user has consumed a food containing the saccharinity (or carbohydrate). Even when the user consumes a food containing the same amount of saccharinity, the speed of absorption of the saccharinity may be different depending on a form (or a quality) of the saccharinity. Because the glycemic index may be measured on the basis of <NUM> of the carbohydrate, the glycemic index of a food with a low carbohydrate proportion may be relatively high compared with an amount the food intake. The glycemic load, which is the glycemic index multiplied by a weight (unit: g) of the carbohydrate contained in the food and divided by <NUM>, is an index in consideration of the amount of the food intake. The glycemic load may be used to account for changes in the blood glucose depending on the amount of intake, which is not included in the glycemic index. The electronic device <NUM> may obtain the information associated with the blood glucose by measuring the blood glucose of the user. The electronic device <NUM> may provide the user with information about the health status of the user (e.g., digestibility, blood glucose load, or metabolic status) or information about the food (e.g., glycemic index or glycemic load). For example, the blood glucose may be measured based on at least one of a blood glucose value (e.g., the first blood glucose values <NUM>) based on the measurement time, an area under the curve (AUC), or a slope of a change amount of the blood glucose value.

According to an embodiment, because the blood glucose may change depending on a user's condition (e.g., meal state or sleep state), the blood glucose may need to be measured whenever the user's condition changes. For example, the blood glucose value may be lowest in an empty-stomach state (e.g., a first time point <NUM>) and the blood glucose value may be highest at a time point (e.g., a second time period <NUM>) one hour after the meal. Because an electronic device (e.g., the electronic device <NUM> in <FIG>) may measure the blood glucose of the user while worn on the body part (e.g., wrist) of the user, the blood glucose may be monitored at a predetermined period of time. The electronic device <NUM> may sense whether an event associated with the blood glucose measurement occurs based on the monitored result.

According to the invention, the event associated with the blood glucose measurement may include a meal event or a sleep event, depending on the status of the user. According to the invention, the electronic device <NUM> is configured to identify a time point (e.g., a fourth time point <NUM>) at which the blood glucose is equal to or above a predetermined threshold value According to an embodiment, it may identify a time point at which a slope of the blood glucose values increases sharply to sense the meal event. According to an embodiment, the electronic device <NUM> may sense the meal event based on at least one of a biological signal (e.g., heart rate) of the user or a movement of the user sensed by the motion sensor (e.g., at least one of the acceleration sensor or the gyro sensor) in addition to the blood glucose value. According to an embodiment, the electronic device <NUM> may sense the meal event based on at least one of the blood glucose value, the biological signal, or the movement of a user. According to the invention, the electronic device <NUM> is configured to determine that the sleep event has occurred after a predetermined time (e.g., <NUM> hours) has elapsed since the sleep of the user was sensed. When the sleep event is sensed, it may mean that the user is in the empty-stomach state (e.g., the time point <NUM>).

According to the invention, because an accuracy of the blood glucose measurement may be reduced due to a blood glucose measurement environment (e.g., at least one of the user's movement, the ambient environment (e.g., illumination environment), or a wearing condition) of the electronic device <NUM>, the electronic device <NUM> is configured to guide the user to measure the blood glucose via the external electronic device when the event associated with the blood glucose measurement occurs. For example, when the fourth time point <NUM> indicates a time point of <NUM> minutes after the meal, the electronic device <NUM> may guide the user to measure the blood glucose via the external electronic device at least one time point of the current time point (e.g., <NUM>), the time point (e.g., <NUM>) one hour after the meal, or the time point (<NUM>) three hours after the meal.

According to an embodiment, the electronic device <NUM> may use the second blood glucose values <NUM> measured by the external electronic device to calibrate the first blood glucose values <NUM> measured by the electronic device <NUM>. For example, the electronic device <NUM> may replace, with the second blood glucose values <NUM>, a blood glucose value of the first blood glucose values <NUM>, corresponding to a time point (e.g., at least one of <NUM>, <NUM>, or <NUM>) at which the blood glucose is measured by the external electronic device. The electronic device <NUM> may generate the second graph <NUM> in which at least some of the first blood glucose values <NUM> are calibrated based on the second blood glucose values <NUM>. The electronic device <NUM> may provide the user with the information associated with the blood glucose based on the blood glucose values represented by the second graph <NUM>.

<FIG> illustrates the embodiment in which the electronic device <NUM> measures the blood glucose, but an embodiment in which the electronic device <NUM> measures a different biological signal may be applied on the same principle. For example, the electronic device <NUM> may monitor a user's blood pressure via the biometric information sensor <NUM> while being worn on the body part of the user. The electronic device <NUM> may sense an event associated with a blood pressure measurement. The event associated with the blood pressure measurements may occur, for example, at a predetermined time (e.g., within <NUM> minutes) after an end of an exercise. According to an embodiment, the electronic device <NUM> may sense the event associated with the blood pressure measurement by measuring the user's movement using a sensor (e.g., the acceleration sensor or the gyro sensor) other than the biometric information sensor <NUM>.

<FIG> illustrates a communication system <NUM> for measuring a biological signal according to certain embodiments.

Referring to <FIG>, a server <NUM> may store data associated with the biological signal. The data associated with the biological signal may be, for example, at least one of a biological signal value measured by the electronic device <NUM> (e.g., the first blood glucose values <NUM> in <FIG>), a biological signal value (e.g., the second blood glucose values <NUM> in <FIG>) measured by the mobile device <NUM> or the measuring device <NUM>, a calibrated biological signal value (e.g., the blood glucose values represented by the second graph <NUM> in <FIG>), or information generated based on the calibrated biological signal (e.g., the glucose tolerance, the glycemic index, or the glycemic load). The electronic device <NUM> may secure a memory space by measuring the biological signal and storing the data associated with the biological signal in the server <NUM>.

According to an embodiment, the measuring device <NUM> (e.g., a blood glucose meter) may perform the same operation as the operation of the external electronic device in <FIG>. For example, the measuring device <NUM> may include at least one of the blood analyzer or the SMBG. When the event associated with the biological signal measurement occurs, the electronic device <NUM> may guide the user to measure the biological signal via the measuring device <NUM>.

According to an embodiment, the mobile device <NUM> may be at least one of a portable communication device (e.g., a smart phone or a tablet), a computer device, or a portable multimedia device. The electronic device <NUM> may be connected to the mobile device <NUM> via a wireless communication protocol. The wireless communication protocol may be based on the first network <NUM> or the second network <NUM> in <FIG>, for example. In another example, the wireless communication protocol may be based on at least one of a Bluetooth low energy (BLE), an ultra-wide band (UWB), and a near field communication (NFC).

According to an embodiment, the electronic device <NUM> may transmit or receive data with the server <NUM> or the measuring device <NUM> via the mobile device <NUM>. For example, when the biological signal is measured by the measuring device <NUM>, the measuring device <NUM> may transmit the measured biological signal value to the electronic device <NUM> via the mobile device <NUM>. Alternatively, the mobile device <NUM> may deliver the information (e.g., the glucose tolerance, the glycemic index, or the glycemic load) generated by the electronic device <NUM> to the server <NUM>. According to another embodiment, the mobile device <NUM> may store the data associated with the biological signal on behalf of the server <NUM>, and may measure the biological signal value on behalf of the measuring device <NUM>.

According to an embodiment, the communication system <NUM> may not include the mobile device <NUM>. In this case, the electronic device <NUM> may perform wireless communication with the server <NUM> or the measuring device <NUM> based on the wireless communication protocol. For example, when the measuring device <NUM> is connected to the server <NUM> via a wired network or a wireless network and the server <NUM> stores data associated with biological signals for a plurality of users using the measuring device <NUM>, the server <NUM> may store user account information of the electronic device <NUM>. When the event associated with the measurement of the biological signal occurs, the electronic device <NUM> may transmit a message requesting the measurement of the biological signal to the server <NUM>. The server <NUM> may identify the electronic device <NUM> based on the stored user account information and deliver the user account information of the electronic device <NUM> to the measuring device <NUM>. The measuring device <NUM> may transmit the measured biological signal value to the server <NUM>. In another example, the electronic device <NUM> may sense that the measuring device <NUM> is located within a predetermined threshold distance based on the short-distance wireless communication protocol (e.g., at least one of the BLE, the UWB, or the NFC) and directly transmit the user account information to the measuring device <NUM> based on the wireless communication protocol.

<FIG> illustrates a UI of the electronic device <NUM> that guides a measurement of a biological signal according to certain embodiments.

Referring to <FIG>, the electronic device <NUM> may display a UI that guides a measurement of the biological signal (e. , the blood glucose) via the display device <NUM>. For example, when the event (e.g., at the time point <NUM> minutes after the meal) associated with the blood glucose measurement occurs, the electronic device <NUM> may display text (e.g., "<NUM> minutes have elapsed since the meal! Please use one device for an accurate measurement") that guides the blood glucose measurement via the display device <NUM>.

According to another embodiment, the electronic device <NUM> may output sound via an audio module (e.g., <NUM> and <NUM> in <FIG> and <FIG>) or output vibration via a haptic module (e.g., <NUM> in <FIG>) when the event associated with the blood glucose measurement is detected. According to another embodiment, the electronic device <NUM> may output at least two of the UI, the sound, or the vibration at the same time.

According to an embodiment, the electronic device <NUM> may, on the display device <NUM>, display a list of external electronic devices (e.g., a smartphone or a blood glucose meter) that may measure the blood glucose. For example, the smartphone may mean the mobile device <NUM> in <FIG>, and the blood glucose meter may mean the measuring device <NUM> in <FIG>. According to an embodiment, the electronic device <NUM> may display the external electronic devices on the list in an order of priority of the external electronic devices. The priority of the external electronic devices may be determined based on at least one of, for example, a distance between the external electronic device and the electronic device <NUM>, a recent measurement history, or an accuracy of the measurement.

Although not illustrated in <FIG>, according to an embodiment, the electronic device <NUM> may, in response to a user input of selecting one external electronic device from the displayed list, display information associated with the external electronic device via the display device <NUM>. The information associated with the external electronic device may include, for example, at least one of a location of the external electronic device, a usable state, or a type of a sensor that the external electronic device includes.

<FIG> illustrates a UI of an IoT device <NUM> that guides a measurement of a biological signal according to certain embodiments.

Referring to <FIG>, the IoT device <NUM> may be a home appliance (e.g., a speaker, a television, a refrigerator, or a washing machine) disposed in an interior space <NUM>. According to an embodiment, the IoT device <NUM> may be connected to the electronic device <NUM> via a wireless communication protocol. The wireless communication protocol may be based, for example, on at least one of the first network <NUM>, the second network <NUM>, the BLE, the UWB, or the NFC in <FIG>. According to another embodiment, the IoT device <NUM> may be connected via the wireless communication protocol with at least one of the mobile device <NUM> or the server <NUM> in <FIG>.

According to an embodiment, when the event (e.g., at the time point <NUM> minutes after the meal) associated with the measurement of the blood glucose occurs, the electronic device <NUM> may transmit information associated with the event to the IoT device <NUM> (e.g., an AI-enabled speaker). The information associated with the event may include, for example, at least one of a time point at which the event occurred, a name of the external electronic device, or a location of the external electronic device. According to another embodiment, the server <NUM> in <FIG> may transmit the information associated with the event to the IoT device <NUM>. The IoT device <NUM> may output a sound (e.g., "Mr. <NUM>, <NUM> minutes have passed since the meal. Please measure the blood glucose with an XX blood glucose meter for an accurate measurement. ") that guides the blood glucose measurement based on the information associated with the event.

According to another embodiment, when the electronic device <NUM> is detached from the body part of the user after the event associated with the measurement of the biological signal is sensed, the electronic device <NUM> may transmit the information associated with the event to the IoT device <NUM>.

According to another embodiment, a server <NUM> may transmit the information associated with the event to the IoT device <NUM> after a predetermined time has elapsed since the event associated with the measurement of the biological signal occurred. For example, when the meal event (e.g., at the time point <NUM> minutes after the meal) occurs, the server <NUM> may transmit the information associated with the event to the IoT device <NUM> at the time point <NUM> minutes after the meal event.

<FIG> illustrates an operational flowchart <NUM> of the electronic device <NUM> that calibrates a biological signal value according to certain embodiments. In embodiments to be described below, operations illustrated in <FIG> or another operational flowchart may be performed by the electronic device <NUM> or by the processor <NUM>.

Referring to <FIG>, in operation <NUM>, the electronic device <NUM> may monitor the user's biological signal value. The electronic device <NUM> may monitor the biological signal value using the biometric information sensor <NUM> while the electronic device <NUM> is worn by user, or otherwise coupled on a body part (e.g., the wrist) of the user via the attachment member (e.g., <NUM> and <NUM> in <FIG>). According to an embodiment, the electronic device <NUM> may periodically monitor the biological signal value at predetermined time intervals (e.g., <NUM> minute, <NUM> minutes, <NUM> minutes, or <NUM> minutes).

In operation <NUM>, the electronic device <NUM> may prompt the user to obtain a measurement of the biological signal using an external electronic device (e.g., the mobile device <NUM> or the measuring device <NUM> in <FIG>) based on the monitored biological signal value. According to an embodiment, the electronic device <NUM> may display, via the display device <NUM> (or via the display <NUM>) a UI notification that prompts the user to measure the biological signal using the external electronic device. In another example, the electronic device <NUM> may output sound via an audio module (e.g., <NUM> and <NUM> in <FIG> and <FIG>) or may output vibration via a haptic module (e.g., <NUM> in <FIG>) to indicate the same to the user. According to an embodiment, the electronic device <NUM> may output at least two of the UI notification, the sound notification, or the vibration. According to another embodiment, the electronic device <NUM> may prompt, via an IoT device (e.g., <NUM> in <FIG>) that is communicatively connected with the electronic device <NUM> via the wireless communication, the user to measure the biological signal using the external electronic device, using some output by the IoT device.

In operation <NUM>, the electronic device <NUM> may receive the biological signal value measured by the external electronic device. According to an embodiment, the electronic device <NUM> may receive the biological signal value measured by the external electronic device from the external electronic device or from another electronic device (e.g., the mobile device <NUM> or the server <NUM>), via wired or wireless transmission.

According to an embodiment, the electronic device <NUM> may provide a reception notification to the user in response to reception of the biological signal value, as measured by the external electronic device. For example, the electronic device <NUM> may display a UI notification indicating the reception of the biological signal value, via the display device. In another example, the electronic device <NUM> may output a sound notification via the audio module, or output a vibrational notification via the haptic module. According to an embodiment, the electronic device <NUM> may output at least two of the UI, the sound, or the vibration notifications.

According to an embodiment, the electronic device <NUM> may display the biological signal value measured by the external electronic device and the biological signal value monitored by the electronic device <NUM> together via the display device. For example, the electronic device <NUM> may display the first graph <NUM> illustrated in <FIG>.

According to an embodiment, the electronic device <NUM> may calibrate the local biometric sensor which monitored the local biological signal value, based on the biological signal value measured by the external electronic device. For example, the electronic device <NUM> may generate the second graph <NUM> based on the first graph <NUM> in <FIG>.

According to an embodiment, when the biological signal value is calibrated, the electronic device <NUM> may notify the user of the calibration of the biometric sensor and the corresponding biological signal value. For example, the electronic device <NUM> may display a UI screen including the second graph <NUM> via the display device. In another example, the electronic device <NUM> may output a sound notification via the audio module or output the vibration via the haptic module. According to an embodiment, the electronic device <NUM> may output at least two of the UI, the sound, or the vibration notifications.

<FIG> illustrates an operational flowchart <NUM> of the electronic device <NUM> that guides a measurement of a biological signal in response of an occurrence of an event, according to various embodiment. <FIG> illustrates a graph <NUM> illustrating a time point at which an event occurred, according to certain embodiments. The operational flowchart <NUM> illustrated in <FIG> may be an embodiment of the operations <NUM> and <NUM> in <FIG>.

Referring to <FIG>, in operation <NUM>, the electronic device <NUM> may monitor the user's biological signal value (e.g., the operation <NUM> in <FIG>).

In operation <NUM>, the electronic device <NUM> may determine whether a predefined event associated with the measurement of the biological signal occurs. When the biological signal tracks blood glucose, an example of a predefined event associated with the measurement of the biological signal may include, for example, at least one of a caloric intake event (e.g., a meal) or a resting state event (e.g., a sleep event). When the biological signal includes blood pressure, the predefined event associated with the measurement of the biological signal may occur, for example, at a time point in which a predetermined time has elapsed after the termination of a period of exercise.

According to an embodiment, the electronic device <NUM> may detect the meal event based on at least one of a time point at which the blood glucose is equal to or above the predetermined threshold value, or a time point at which the rate of change (e.g., a slope) in current blood glucose values increases sharply. For example, referring to the graph <NUM> in <FIG>, the electronic device <NUM> may identify a time point (e.g., a time point <NUM>) at which the blood glucose value measured by the biometric information sensor <NUM> is equal to or above a threshold value <NUM> (e.g., <NUM>/dL) or a time point at which the slope of the change amount of the blood glucose value is equal to or above a threshold value (e.g., <NUM>/DL per minute) to sense the meal event. According to another embodiment, the electronic device <NUM> may sense the meal event via the IoT device connected to the electronic device <NUM> via a wired network or a wireless network. The IoT device may be, for example, the IoT device <NUM> in <FIG> or a separate IoT device. For example, when the user opens a door of a refrigerator or takes out a food placed in the refrigerator, the electronic device <NUM> may receive, via a wireless communication protocol, information indicating that the user is preparing the meal from the refrigerator. At the same time that information indicating that the user is preparing the meal, or when a predetermined time has elapsed since the information was received, the electronic device <NUM> may determine that the meal event has occurred.

According to an embodiment, the sleep event may occur at a predetermined time (e.g., <NUM> hours) after the user's sleep is sensed. According to an embodiment, the electronic device <NUM> may determine the user's sleep based on the heart rate of the user measured via the biometric information sensor <NUM>. According to the invention, the electronic device <NUM> is configured to determine the user's sleep based on the movement of the user measured via the motion sensor (e.g., at least one of the acceleration sensor or the gyro sensor). The electronic device <NUM> is configured to determine that the sleep event has occurred at a time point (e.g., <NUM>) at which a predetermined time has elapsed since the user's sleep was sensed.

When the event associated with the measurement of the biological signal is not sensed, the electronic device <NUM> may perform the operations <NUM> and <NUM> repeatedly. When the event associated with the measurement of the biological signal is sensed, in operation <NUM>, the electronic device <NUM> may prompt the user to measure the biological signal using the external electronic device (e.g., the operation <NUM> in <FIG>).

<FIG> illustrates a UI that guides a biological signal measurement by the electronic device <NUM> according to certain embodiments.

Referring to <FIG>, when the event associated with the measurement of the biological signal is sensed, the electronic device <NUM> may guide the user to perform an accurate measurement by the electronic device <NUM>.

In operation <NUM>, when a user <NUM> moves while the electronic device <NUM> is worn on a body part (e.g., a wrist) of the user <NUM>, the electronic device <NUM> may sense a movement of the user <NUM> via a motion sensor (e.g., at least one of a gyro sensor or an acceleration sensor).

When the event (e.g., at least one of the meal event or the sleep event) associated with the measurement of the biological signal occurs while the movement of the user <NUM> is detected, in operation <NUM>, the electronic device <NUM> may display, via the display <NUM>, a UI (e.g., "Do not move for an accurate blood glucose measurement. ") that guides the user not to move. According to another embodiment, the electronic device <NUM> may guide the user to fix an attachment member (e.g., <NUM> and <NUM> in <FIG>) of the electronic device <NUM>. According to another embodiment, when an ambient brightness of the electronic device <NUM> is equal to or above a predetermined threshold value, the electronic device <NUM> may guide the user to reduce a brightness of a surrounding light.

When the movement of the user <NUM> is not sensed, in operation <NUM>, the electronic device <NUM> may measure the biological signal via the biometric information sensor <NUM>. Because a biological signal value measured in the operation <NUM> is more accurate than a biological signal value measured in the operation <NUM>, the electronic device <NUM> may calibrate the biological signal value measured in the operation <NUM> based on the biological signal value measured in the operation <NUM>.

<FIG> illustrates a block diagram <NUM> of the biometric information sensor <NUM> according to an embodiment.

Referring to <FIG>, the emitter <NUM> may include at least one of a first LED <NUM>, a second LED <NUM>, a third LED <NUM>, or a fourth LED <NUM>. The number of the LEDs included in the emitter <NUM> is not limited thereto. According to an embodiment, the first LED <NUM> may be a green LED, the second LED <NUM> may be a blue LED, the third LED <NUM> may be an infrared LED, and the fourth LED <NUM> may be a red LED. According to an embodiment, the emitter <NUM> may include at least one LED that may illuminate a wavelength corresponding to at least one of the blue, the green, the red, and the infrared. For example, the emitter <NUM> may include one LED that may simultaneously illuminate all wavelengths respectively corresponding to the blue, the green, the red, and the infrared rays.

According to certain embodiments, the signal processor <NUM> may include an LED driver <NUM> and an analog to digital converter (ADC) <NUM>. The signal processor <NUM> may further include other components (e.g., an amplifier, a filter, and/or a memory, or the like) not illustrated in <FIG>.

According to certain embodiments, the LED driver <NUM> may control the emitter <NUM> (e.g., at least one of the first LED <NUM>, the second LED <NUM>, the third LED <NUM>, or the fourth LED <NUM>) in a predetermined state. For example, a processor (e.g., the processor <NUM> in <FIG>) may control the emitter <NUM> using the LED driver <NUM>. According to an embodiment, the LED driver <NUM> may drive the emitter <NUM> in an always-on state. According to an embodiment, the LED driver <NUM> may turn the emitter <NUM> on for a predetermined time (e.g., <NUM> µs to <NUM>). According to an embodiment, the LED driver <NUM> may flicker the emitter <NUM> at a predetermined period of time. For example, the LED driver <NUM> may control the emitter <NUM> in a sensing state (e.g., flickering at a sensor sample rate (e.g., <NUM> to <NUM>)).

According to certain embodiments, the ADC <NUM> may convert an analog signal sensed by the receiver <NUM> into a digital signal. According to certain embodiments, the receiver <NUM> may include a plurality of light receiving elements (e.g., photo detectors). According to an embodiment, the receiver <NUM> may include a first receiver <NUM>, a second receiver <NUM>, a third receiver <NUM>, and/or a fourth receiver <NUM>. The four receivers are illustrative, and the receiver <NUM> may include a plurality of receivers.

<FIG> illustrates a structure <NUM> of the biometric information sensor <NUM> according to certain embodiments.

Referring to <FIG>, the biometric information sensor <NUM> may include the plurality of receivers <NUM>, <NUM>, <NUM>, and/or <NUM> respectively positioned adjacent to vertices of the emitter <NUM>.

According to certain embodiments, the biometric information sensor <NUM> may sense an oxygen saturation of an external object using an infrared LED (e.g., the third LED <NUM>) and a red LED (e.g., the fourth LED <NUM>). According to an embodiment, an electronic device (e. , the electronic device <NUM> in <FIG>) may simultaneously or sequentially illuminate the infrared LED (e.g., the third LED <NUM>) and the red LED (e.g., the fourth LED <NUM>) and detect red or infrared light using at least one receiver at the same distance from the infrared LED (e.g., the third LED <NUM>) and the red LED (e.g., the fourth LED <NUM>). For example, the electronic device <NUM> may detect the red light and the infrared light using the first receiver <NUM> and/or the third receiver <NUM>. In another example, the electronic device <NUM> may detect the infrared light using the first receiver <NUM> and the red light using the fourth receiver <NUM>.

According to certain embodiments, the electronic device <NUM> may measure a blood glucose of the external object using a receiver located at a position where distances to a blue LED (e.g., the second LED <NUM>) and an infrared LED (e.g., the third LED <NUM>) of the biometric information sensor <NUM> are different. According to an embodiment, the electronic device <NUM> may sense the blood glucose using a receiver relatively close to the blue LED (e.g., the second LED <NUM>) and relatively far away from the infrared LED (e.g., the third LED <NUM>). For example, the biometric information sensor <NUM> may measure the blood glucose by sensing blue light and infrared light using the third receiver <NUM> and/or the fourth receiver <NUM>.

According to certain embodiments, the electronic device <NUM> may sense heart rate information using all of the four receivers <NUM>, <NUM>, <NUM>, and <NUM>. The electronic device <NUM> may, for example, obtain more accurate heart rate information or blood pressure information using the plurality of receivers. According to an embodiment, the electronic device <NUM> may obtain blood pressure information of the external object using the plurality of receivers. The electronic device <NUM> may illuminate a green LED (e.g., the first LED <NUM>) and detect green light using the plurality of receivers. For example, the electronic device <NUM> may accumulate and/or compare data of optical signals respectively detected by the plurality of receivers to obtain the blood pressure information. The electronic device <NUM> may obtain the blood pressure information based on an average or summation of the optical signals respectively detected by the plurality of receivers. The electronic device <NUM> may obtain the blood pressure information using an optical signal having a quality equal to or above a predetermined value (e.g., a SNR equal to or above a predetermined value) among optical signals detected by the plurality of receivers. According to an embodiment, the electronic device <NUM> may obtain heart rate information of the external object using the plurality of receivers. The electronic device <NUM> may simultaneously or sequentially illuminate a green LED (e.g., the first LED <NUM>) and an infrared LED (e.g., the third LED <NUM>) and detect green light and infrared light using the plurality of receivers. The electronic device <NUM> may obtain the heart rate information based on an average or summation of optical signals detected by the plurality of receivers. The electronic device <NUM> may obtain the heartbeat information using an optical signal having a quality equal to or above a predetermined value (e.g., a SNR equal to or above a predetermined value) among the optical signals detected by the plurality of receivers.

As described above, an electronic device (e.g., <NUM> in <FIG>) may include a housing (e.g., <NUM> in <FIG>), a display (<NUM> in <FIG>) visible through a first portion of the housing, a photoplethysmogram (PPG) sensor (<NUM> in <FIG>) exposed through a second portion of the housing, a wireless communication circuit (e.g., <NUM> in <FIG>), a processor (e.g., <NUM> in <FIG>) operatively connected to the display, the PPG sensor, and the wireless communication circuit, and a memory (e.g., <NUM> in <FIG>) operatively connected to the processor, in which the memory may store instructions, and when the instructions are executed, the processor may monitor blood glucose values of a user using the PPG sensor, display, via the display, a notification informing the user to measure blood glucose values using an external electronic device (e.g., <NUM> or <NUM> in <FIG>) at least partially based on the monitored blood glucose values, and receive the blood glucose values measured by the external electronic device using the wireless communication circuit.

According to an embodiment, the instructions may allow the processor to calibrate the monitored blood glucose values at least partially based on the received blood glucose values.

According to an embodiment, the instructions may allow the processor to store information associated with the calibrated blood glucose values in the memory, or transmit the information associated with the calibrated blood glucose values to the external electronic device or a server (<NUM> in <FIG>) using the wireless communication circuit.

According to an embodiment, the instructions may allow the processor to sense an occurrence of an event at least partially based on the monitored blood glucose values, and display the notification via the display in response to the occurrence of the event.

According to an embodiment, the instructions may allow the processor to detect the occurrence of the event when the monitored blood glucose values are equal to or above a selected value, and/or when a slope of a change amount of the monitored blood glucose values is equal to or above a threshold value.

According to an embodiment, the event may include at least one of a meal event or a sleep event.

According to an embodiment, the instructions may allow the processor to receive the blood glucose values measured by the external electronic device from the external electronic device or a server using the wireless communication circuit.

According to an embodiment, the electronic device of claim may further include an attachment structure (e.g., <NUM> and <NUM> in <FIG>) connected to a portion of the housing and coupled to a body part of the user.

As described above, a method of a wearable device (e.g., <NUM> in <FIG>) worn on a body part of a user may include monitoring blood glucose values of the user in every predetermined period of time, displaying a user interface (UI) for guiding the user to measure blood glucose values by an external electronic device at least partially based on the monitored blood glucose values, and receiving the blood glucose values measured by the external electronic device.

According to an embodiment, the receiving of the blood glucose values measured by the external electronic device may include receiving the blood glucose values measured by the external electronic device from the external electronic device or a server.

According to an embodiment, the method may further include calibrating at least some of the monitored blood glucose values at least partially based on the received blood glucose values.

According to an embodiment, the method may further include storing information associated with the calibrated blood glucose values in a memory of the wearable device, or transmitting the information associated with the calibrated blood glucose value to the external device or a server.

According to an embodiment, the displaying of the UI may include sensing an event associated with a measurement of a blood glucose at least partially based on the monitored blood glucose values, and displaying the UI when the event associated with the measurement of the blood glucose is sensed.

According to an embodiment, the sensing of the event associated with the measurement of the blood glucose may include sensing the event associated with the measurement of the blood glucose at least partially based on a slope of a change amount of the monitored blood glucose values.

According to an embodiment, the sensing of the event associated with the measurement of the blood glucose may include sensing a sleep state of the user, and sensing the event associated with the measurement of the blood glucose at least partially based on the sensed sleep state and the monitored blood glucose values.

As described above, a wearable device (e.g., <NUM> in <FIG>) capable of being worn on a body part of a user may include at least one attachment member (e.g., <NUM> and <NUM> in <FIG>) capable of being detached from the body part of the user, a housing (e.g., <NUM> in <FIG>) coupled to the at least one attachment member, a display (e.g., <NUM> in <FIG>) visible through a first portion of the housing, a photoplethysmogram (PPG) sensor (e.g., <NUM> in <FIG>) exposed through a second portion of the housing opposite to the first portion, a wireless communication circuit (e.g., <NUM> in <FIG>) included in the housing, a processor (e.g., <NUM> in <FIG>) operatively connected to the display, the PPG sensor, and the wireless communication circuit, and a memory (e.g., <NUM> in <FIG>) operatively connected to the processor, in which the memory may store instructions, and when the instructions are executed, the processor may monitor blood glucose values of the user using the PPG sensor, display, via the display, a notification informing the user to measure blood glucose values using an external electronic device (e.g., <NUM> or <NUM> in <FIG>) at least partially based on the monitored blood glucose values, receive the blood glucose values measured by the external electronic device using the wireless communication circuit, and calibrate the blood glucose values of the wearable device at least partially based on the received blood glucose values.

According to an embodiment, the instructions may allow the processor to detect an event at least partially based on the monitored blood glucose values, and display the notification via the display in response to the detection of the event.

According to an embodiment, the instructions may allow the processor to determine an occurrence of the event when the monitored blood glucose values are equal to or above a selected value.

According to an embodiment, the instructions may allow the processor to detect an occurrence of the event at least partially based on a slope of a change amount of the monitored blood glucose values.

The electronic device according to certain embodiments may be one of various types of electronic devices.

It should be appreciated that certain embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment.

Certain embodiments as set forth herein may be implemented as software (e.g., the program <NUM>) including one or more instructions that are stored in a storage medium (e.g., internal memory <NUM> or external memory <NUM>) that is readable by a machine (e.g., the electronic device <NUM>). The term "non-transitory" simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium.

According to an embodiment, a method according to certain embodiments of the disclosure may be included and provided in a computer program product.

According to certain embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities. According to certain embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. In such a case, according to certain embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to certain embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added.

According to the embodiments disclosed in the disclosure, the electronic device may guide the user to measure the biological signal to induce the user to check a health status of the user.

According to the embodiments disclosed in the disclosure, the electronic device may use the information measured by the external electronic device to increase the accuracy of the biological signal measurement.

In addition, various effects, directly or indirectly understood through this document, may be provided.

Claim 1:
A wearable electronic device (<NUM>), comprising:
a housing (<NUM>);
a display (<NUM>) visible through a first portion of the housing;
a photoplethysmogram (PPG) sensor (<NUM>, <NUM>) exposed through a second portion of the housing;
a motion sensor located within the housing;
a wireless communication circuit (<NUM>);
a processor (<NUM>) operatively connected to the display, the PPG sensor, the motion sensor, and the wireless communication circuit; and
a memory (<NUM>) operatively connected to the processor, wherein the memory stores instructions executable by the processor to cause the wearable electronic device to:
obtain first information using the PPG sensor and obtain second information using the motion sensor;
detect a caloric intake event or a sleeping event based on the first information and the second information;
in response to determining that the caloric intake event or the sleeping event is detected, display a user interface, UI associated with a measurement of blood glucose on the display,
wherein the UI comprises guide information for a user to measure the blood glucose using an external device,
receive a transmission through the wireless communication circuit of a second blood glucose value as detected by an external electronic device;
wherein the instructions are further executable by the processor to cause the wearable electronic device to:
monitor a blood glucose value based on the first information;
identify a first blood glucose value that is equal to or above a predetermined threshold while the blood glucose value is monitored;
in response to identifying the first blood glucose value, detect the caloric intake event; and
in response to determining that a first specified time is elapsed from a first time point at which the caloric intake event is detected, display the UI on the display, and
wherein the instructions are further executable by the processor to cause the wearable electronic device to:
detect the sleeping based on the second information; and
in response to determining that a second specified time is elapsed from a second time point at which the sleeping event is detected, display the UI on the display.