Electronic device, method for controlling electronic device, and storage medium

Abstract

To more surely notify a failure state of an own apparatus.SOLUTION: A timepiece 100 as an electronic device includes a temperature detection sensor 19 that acquires temperature information of a device main body 1, a controlled unit (for example, a light emitting unit 15 of a biological sensor capable of acquiring biological information), a CPU10 as a processing unit, and a display unit 12 as a notification unit, and the CPU10 causes the controlled unit (for example, the light emitting unit 15) to operate and causes the temperature detection sensor 19 to acquire temperature information of the device main body (at least around a back lid) in a case where a predetermined condition is satisfied at a timing when the controlled unit does not operate. It is determined whether the temperature of the device main body acquired by the temperature detection sensor 19 is equal to or higher than a threshold value, and when it is equal to or higher than the threshold value, a notification part such as a display part 12 is operated to notify a user that the temperature is equal to or higher than the threshold value.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electronic device, a control method for an electronic device, and a program. [Background technology]

[0002] In order to prevent low-temperature burns caused by heat generation in electronic devices, a technology has been disclosed that acquires the temperature inside the electronic device and, if the internal temperature is above a threshold, transitions the operating state to a state that generates less heat (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-60872 Summary of the Invention [Problem to be solved by the invention]

[0004] When a component that may cause heat generation in an electronic device is not in operation, it is not possible to detect heat generation due to a malfunction by measuring the temperature inside the electronic device. As a result, even if the electronic device is in a state where it may generate heat, the user may continue to use the electronic device without realizing it and suffer low-temperature burns, which poses a safety issue.

[0005] The present invention has been made in view of the above circumstances, and aims to provide an electronic device, a control method for an electronic device, and a program that can more reliably notify a user of a fault state of the device itself. [Means for solving the problem]

[0006] In order to solve the above problem, the electronic device of the present invention comprises a temperature information acquisition unit that acquires temperature information of the device main body, a controlled unit, a processing unit, and an alarm unit, and when predetermined conditions are met at a time when the controlled unit is not operating, the processing unit operates the controlled unit, causes the temperature information acquisition unit to acquire temperature information of the device main body, determines whether the temperature of the device main body acquired by the temperature information acquisition unit is above a threshold value, and if it is above the threshold value, operates the alarm unit to notify that the temperature is above the threshold value. [Effects of the Invention]

[0007] According to the present invention, it is possible to more reliably notify a failure state of the device itself. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an example of the appearance of a timepiece according to an embodiment. [Figure 2] FIG. 2 is a block diagram illustrating an example of the functional configuration of the timepiece according to the embodiment. [Figure 3] 10 is a flowchart showing an example of operation control of a timepiece based on temperature detection, illustrating an operation control procedure in a first pattern. [Figure 4] 10 is a flowchart showing an example of operation control of a timepiece based on temperature detection, illustrating an operation control procedure in a second pattern. [Figure 5] 10 is a flowchart showing an example of operation control of a timepiece based on temperature detection, illustrating an operation control procedure in a third pattern. [Figure 6] 10 is a flowchart showing an example of operation control of a timepiece based on temperature detection, illustrating an operation control procedure in a fourth pattern. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of an electronic device, a control method for an electronic device, and a program according to the present invention will be described below with reference to the accompanying drawings. In this embodiment, the electronic device is a wristwatch (hereinafter simply referred to as "watch" 100) that is worn on a user's wrist.

[0010] The watch 100 has a device main body 1 (watch main body) provided with a display unit 12, an operation reception unit 13, and the like. A band 3 is attached to the device main body 1 for wearing the device main body 1 on the wrist. As shown in FIG. 2, the display unit 12 has a display screen 121, and displays digital information on the display screen 121 under the control of the CPU 10. The display screen 121 is capable of displaying information in a dot matrix format, and is, for example, a liquid crystal display screen. The watch 100 displays basic information such as the time and date on the display screen 121. The display screen 121 also appropriately displays measurement results such as the user's pulse rate (heart rate). Furthermore, the display unit 12 (display screen 121) of this embodiment appropriately displays various error messages, and the display unit 12 also functions as an alarm unit.

[0011] A plurality of operation reception units 13 are provided on the side of the device body 1, etc. The operation reception units 13 receive user input operations (for example, pressing operations) on the operation reception units 13 and output the received operation as an input signal to the CPU 10. The CPU 10 executes processing corresponding to the function of the operation reception unit 13 for which the input operation was performed. The function assigned to each operation reception unit 13 may be switched depending on the operating mode of the timepiece 100. The operation reception units 13 may include a crown in addition to operation buttons that receive pressing operations. The operation reception units 13 may also have a touch panel provided over the display screen 121.

[0012] The watch 100 of this embodiment also includes a biosensor 150 inside the device body 1 that can acquire various types of biometric information. The biosensor 150 is a controlled unit whose operation is controlled by the CPU 10 (processing unit), which will be described later. The biosensor 150 includes at least a light-emitting unit 15. In this embodiment, the biosensor 150 includes the light-emitting unit 15 and a light-receiving unit 17. The light-emitting unit 15 and the light-receiving unit 17 are located on the back side of the device body 1, such as the back cover (not shown), near the surface that comes into contact with the user's wrist when worn. The light-emitting unit 15 includes a light-emitting element that emits light, such as an LED (Light Emitting Diode). The LED of the light-emitting unit 15 emits light in response to a drive current supplied by a light-emitting drive device 16, which will be described later, and emits light from the back side of the device body 1 toward the outside. When the watch 100 is worn by the user, the light emitted from the light-emitting unit 15 is reflected by the skin of the user's wrist. The light receiving unit 17 includes a light receiving element that detects light and outputs an electrical signal corresponding to the amount of light received, and is provided at a position where it can receive light emitted from the light emitting unit 15 and reflected by the user's skin. Here, the amount of light received is, for example, the intensity of incident light. The light receiving element may be, for example, a photodiode or an illuminance sensor.

[0013] The light-emitting unit 15 in this embodiment includes at least a first light-emitting unit 151 and a second light-emitting unit 152. The light-receiving unit 17 also includes at least a first light-receiving unit 171 and a second light-receiving unit 172 corresponding to the light-emitting unit 15. Note that when simply referred to as the light-emitting unit 15, it is assumed to include the first light-emitting unit 151 and the second light-emitting unit 152. When simply referred to as the light-receiving unit 17, it is assumed to include the first light-receiving unit 171 and the second light-receiving unit 172. The first light-emitting unit 151 and the corresponding first light-receiving unit 171 are sensors for detecting whether the electronic device, the timepiece 100, is worn or unworn. In this embodiment, infrared light is used to detect whether the electronic device is worn or unworn. For this reason, the first light-emitting unit 151 for wearing or unworn detection includes an LED that emits infrared light, and the first light-receiving unit 171 is also capable of detecting infrared light corresponding to this. Infrared light (IR) is light in a range that exceeds the wavelength range of 380 to 750 nm, which is the visible light range for humans, and unlike visible light, it is invisible to the human eye. Therefore, even if the LED is lit, it is not noticed by the user, and attachment / detachment detection can be performed without the user being aware that a detection operation is being performed. Note that the first light-emitting unit 151 equipped with an LED that emits infrared light is not limited to one used for attachment / detachment detection. The first light-emitting unit 151 may also be used to acquire only biological information other than attachment / detachment detection.

[0014] The second light-emitting unit 152 and the corresponding second light-receiving unit 172 are sensors for detecting pulses, etc. The second light-emitting unit 152 includes an LED that emits green light, e.g., light with a peak wavelength of 520 nm to 530 nm, that is easily absorbed by hemoglobin in the blood, and irradiates the light onto the user's skin. The second light-receiving unit 172 is also capable of detecting light that is emitted from the second light-emitting unit 152 and reflected by the user's skin. A portion of the light irradiated onto the user's skin is absorbed by the blood in the blood vessels. Therefore, the amount of light reflected from the skin and received by the second light-receiving unit 172 changes over time in response to changes in blood flow caused by the heartbeat. The pulse is detected based on this change in the amount of received light, and the pulse rate is measured based on the detected pulse. The light-emitting unit 15 provided in the watch 100 is not limited to the example shown here and may include, for example, an LED that emits red light for measuring oxygen saturation (SpO2). When two types of light, red light and non-red light (such as green light), are shone on the skin, there is a difference in the amount of light transmitted through hemoglobin that is bound to oxygen and hemoglobin that is not bound to oxygen. Therefore, oxygen saturation can be measured by detecting the difference in the amount of light transmitted.

[0015] The timepiece 100 of this embodiment also includes an acceleration sensor 18, a temperature detection sensor 19, and other components. The acceleration sensor 18 detects the acceleration of the timepiece 100, which occurs in response to the user's movements and outputs an electrical signal corresponding to the acceleration. The acceleration sensor 18 detects acceleration in each of the three axes of a Cartesian coordinate system, for example. The temperature detection sensor 19 includes, for example, a thermistor, detects the temperature of the device main body 1, and outputs the detection result to the CPU 10. As described above, the timepiece 100 of this embodiment includes a biosensor 150 capable of acquiring biometric information, located near the surface that comes into contact with the user's wrist when the device is worn, such as the back cover side of the device main body 1. If there is an abnormality (such as an internal short circuit) in the light-emitting drive device 16 that drives the light-emitting unit 15 constituting the biosensor 15, illuminating the light-emitting unit 15 will cause the device main body 1, particularly the back cover side on which the light-emitting unit 15 is mounted, to generate heat. To detect this heat generation, the temperature detection sensor 19 is located near the back cover of the device main body 1 on which the light-emitting unit 15 is mounted, for example. The specific configuration of the temperature detection sensor 19 is not particularly limited.

[0016] In addition to the above, timepiece 100 also includes the following functional configuration: timepiece 100 includes a CPU 10 (Central Processing Unit), a memory 11 (storage unit), an oscillation circuit 141, a frequency divider circuit 142, a timing circuit 143, a light emission driver 16, an A / D converter 20, etc.

[0017] The CPU 10 is a processor that performs various arithmetic operations and controls the overall operation of each part of the timepiece 100. The CPU 10 functions as a processing unit (control means) that performs various control operations by reading and executing a program 111 stored in the memory 11. In the embodiment, the CPU 10 and the memory 11 form a computer that controls the timepiece 100, which is an electronic device.

[0018] For example, the CPU 10 displays the date and time being counted by the timing circuit 143 on the display unit 12. The CPU 10 also determines whether the timepiece 100 is being worn on the user's wrist or the like (wear / wear detection) based on the amount of light received by the light receiving unit 17 (first light receiving unit 171). Wear / wear detection may also be performed taking into account the acceleration detection results of the acceleration sensor 18. The CPU 10 also detects the pulse based on changes in the amount of light received by the light receiving unit 17 (second light receiving unit 172). The CPU 10 may also display the measurement results of the pulse rate (number of pulses per minute) on the display unit 12. The CPU 10, which is the processing unit in this embodiment, also operates the controlled unit (biometric sensor 150 in this embodiment) when a predetermined condition is met while the controlled unit is not operating, and causes the temperature detection sensor 19, which is the temperature information acquisition unit, to detect the temperature of the device main body 1 (particularly, the vicinity of the back cover, etc.) and acquire the temperature information. When detecting temperature using the temperature detection sensor 19, the CPU 10 activates at least the light-emitting unit 15 of the biosensor 150. In this case, the light-emitting unit 15 that is activated is the first light-emitting unit 151 for attachment / detachment detection. The CPU 10 then determines the temperature state of the device main body 1 based on the temperature information acquired from the temperature detection sensor 19. Specifically, the CPU 10 determines whether the temperature of the device main body 1 acquired by the temperature detection sensor 19 is equal to or higher than a threshold. If the temperature is equal to or higher than the threshold, the CPU 10 activates the display unit 12 as a notification unit to notify the user that the temperature is equal to or higher than the threshold. The "predetermined condition" referred to here will be described later with reference to FIGS. 3 to 6.

[0019] The memory 11 provides the CPU 10 with working memory space and stores various data. The memory 11 includes, for example, a random access memory (RAM) and a nonvolatile memory. The RAM is used for the CPU 10's arithmetic processing and also stores temporary data. The nonvolatile memory, such as a flash memory, stores the program 111 and various data. The program 111 includes a control program for controlling the basic operations of the watch 100, an application program for measuring the pulse rate and displaying the results on the display unit 12, and an application program (temperature measurement app) for measuring the temperature of the device body 1 and notifying the user if the device is overheating. The memory 11 also stores a "temperature threshold 112" that serves as a criterion for determining whether the temperature detected by the temperature sensor 19 is above a threshold. Note that multiple temperature thresholds 112 may be prepared depending on various conditions, such as the outside air temperature, and the CPU 10 may refer to these as appropriate to determine whether the temperature detected by the temperature sensor 19 is above a threshold.

[0020] Oscillator circuit 141 generates a clock signal of a predetermined oscillation frequency and outputs it to frequency divider circuit 142. Frequency divider circuit 142 divides the clock signal input from oscillator circuit 141, converts it to a frequency required for the operation of each part of clock 100, and outputs it. Destinations of the signal divided by frequency divider circuit 142 include clock circuit 143.

[0021] The clock circuit 143 counts and stores the current date and time by counting the signal of a predetermined frequency input from the frequency divider circuit 142. The format of the date and time stored by the clock circuit 143 is not limited to that expressed in year, month, day, hour, minute, and second, and may be any appropriate format suitable for processing by the CPU 10 or the like.

[0022] The light-emitting driving device 16 includes a power supply unit, a power supply control unit, a light-emitting driving unit, etc. (not shown), and operates the light-emitting unit 15. The power supply control unit of the light-emitting driving device 16 controls the output of drive current to the light-emitting unit 15 in accordance with a control signal from the CPU 10, thereby causing the LED of the light-emitting unit 15 to light up or turn off. The power supply control unit individually controls the power supply to each light-emitting unit 15 (first light-emitting unit 151 and second light-emitting unit 152), switching it on and off.

[0023] The A / D converter 20 converts the electrical signals output from the light receiving unit 17, the acceleration sensor 18, and the temperature detection sensor 19 into digital data and outputs the digital data to the CPU 10. Therefore, digital data representing the amount of light received by the light receiving unit 17 is output from the A / D converter 20 to the CPU 10. Furthermore, digital data representing the acceleration detection result by the acceleration sensor 18 is output from the A / D converter 20 to the CPU 10. Furthermore, data representing the temperature detection result by the temperature detection sensor 19 is output from the A / D converter 20 to the CPU 10. A separate A / D converter 20 may be provided for each of the light receiving unit 17, the acceleration sensor 18, and the temperature detection sensor 19.

[0024] Next, the operation and control method of the timepiece 100 will be described with reference to FIGS. 3 to 6. In the timepiece 100 of this embodiment, before various full-scale operations begin, the first light-emitting element 151 for attachment / detachment detection, which includes an LED that emits infrared light, is first illuminated. Then, temperature information around the back cover is acquired by the temperature detection sensor 19, and a determination is made as to whether the acquired temperature is above a threshold. As described above, the timepiece 100 of this embodiment has at least the first light-emitting element 151 and the second light-emitting element 152, and the power control unit of the light-emitting drive device 16 controls the power supply to each light-emitting element 15 individually. However, because power is supplied to all light-emitting elements 15 from the same power supply, if a short circuit occurs in the light-emitting drive device 16, problems such as overheating will occur regardless of which light-emitting element 15 is turned on. For this reason, in this embodiment, the first light-emitting element 151 for attachment / detachment detection, which can perform detection operations by lighting an LED without the user being aware of it, is illuminated to determine whether the area around the back cover is overheating to the extent that it could cause low-temperature burns. Below, four patterns of operational control of the timepiece 100 based on temperature detection by the temperature detection sensor 19 are explained as examples.

[0025] First, the first pattern shown in FIG. 3 is an example of operational control when the watch 100 is charging. In this case, the "predetermined condition" refers to the watch 100, which is an electronic device, being charged. That is, the CPU 10 determines whether the watch is charging (step S1), and if it is not charging (step S1; NO), it performs various normal processes. On the other hand, if it is charging (step S1; YES), the watch 100 is typically placed on a charger and not worn by the user, so biometric information acquisition operations such as wear / detachment detection and pulse detection are not performed. At times other than when biometric information is being acquired, the CPU 10 turns on the first light-emitting unit 151 (step S2) and causes the temperature detection sensor 19 to detect the temperature of the device main body 1 (at least around the back cover). The detection result (temperature information) from the temperature detection sensor 19 is acquired by the CPU 10 (step S3), and the CPU 10 determines whether the temperature is above a threshold based on the acquired temperature information (step S4). Here, a temperature above the threshold is a temperature at which a user may suffer low-temperature burns when wearing the watch 100 on their wrist, for example, around 43 to 45 degrees Celsius. The temperature threshold is not limited to this and can be set as appropriate. The temperature threshold is preferably stored in memory 11 ("temperature threshold 112" in Figure 2).

[0026] If the temperature is equal to or higher than the threshold value (step S4; YES), the CPU 10 notifies the user of a temperature error (step S5). For example, the display screen of the display unit 12 may display a message indicating that the temperature of the device main body 1 (at least around the back cover) is at a level that may cause low-temperature burns, or may display the actually measured temperature as a numerical value to alert the user. An error number may be specified for each type of error. In this case, an error number indicating that the temperature is rising (generating heat) may be displayed on the display unit 12. If the watch 100 has an audio output unit, the audio output unit may output an audio message or an alarm sound. An abnormality may also be notified by vibration or the like. The temperature error may be notified using multiple methods, such as visual and audio. The CPU 10 then turns off the first light-emitting unit 151 (step S6) and ends the process. Furthermore, if the temperature is not equal to or higher than the threshold value (step S4; NO), the CPU 10 also turns off the first light-emitting unit 151 (step S6) and ends the process.

[0027] The second pattern shown in FIG. 4 is an example of operational control when the watch 100 is set to periodically perform attachment / detachment detection. In this case, the "predetermined condition" refers to performing attachment / detachment detection. That is, the CPU 10 determines whether it is time for the watch to perform attachment / detachment detection (step S11). If it is not time to perform attachment / detachment detection (step S11; NO), the CPU 10 repeats the determination process until the timing is right. On the other hand, if it is time to perform attachment / detachment detection (step S11; YES), the CPU 10 turns on the first light-emitting unit 151 (LED for attachment / detachment detection) (step S12) and causes the temperature detection sensor 19 to detect the temperature of the device main body 1 (at least the area around the back cover). The detection result (temperature information) from the temperature detection sensor 19 is acquired by the CPU 10 (step S13), and the CPU 10 determines whether the temperature is above a threshold value based on the acquired temperature information (step S14). If the temperature is not above the threshold value (step S14; NO), the CPU 10 returns to step S12 and repeats the process. On the other hand, if the temperature is equal to or higher than the threshold value (step S14; YES), CPU 10 notifies the user of a temperature error (step S15). The specific method for notifying the user of a temperature error is the same as in the first pattern. Thereafter, CPU 10 turns off first light-emitting unit 151 (LED for attachment / detachment detection) (step S16) and ends the process.

[0028] The third pattern shown in FIG. 5 is an example of operation control when the user selects the activity mode or the sleep measurement mode. In this case, the "predetermined condition" refers to the timepiece 100, which is an electronic device, being switched (selected) from the first mode to the second mode. Here, the "second mode" refers to the activity mode or the sleep mode, and the "first mode" refers to a mode other than the activity mode or the sleep mode. Generally, in the activity mode or the sleep measurement mode, the second light-emitting unit 152 is turned on to enable pulse detection. In this embodiment, when the user selects the activity mode or the sleep measurement mode by inputting an operation to the operation receiving unit 13 (step S21), the CPU 10 first turns on the first light-emitting unit 151 (step S22) and causes the temperature detection sensor 19 to detect the temperature of the device main body 1 (at least around the back cover). Note that the selection of the sleep measurement mode is not limited to being performed at the timing of an input operation to the operation receiving unit 13. For example, if the user has set a bedtime in advance, the sleep measurement mode may be automatically selected when that time arrives. Furthermore, the activity mode may not be selected at the timing of an input operation to the operation reception unit 13. For example, the activity mode may be automatically selected when it is determined that the user is exercising based on information detected by the acceleration sensor 18 or the like. The detection result (temperature information) by the temperature detection sensor 19 is acquired by the CPU 10 (step S23), and the CPU 10 determines whether the temperature is equal to or higher than a threshold based on the acquired temperature information (step S24). If the temperature is equal to or higher than the threshold (step S24; YES), the CPU 10 notifies the user of a temperature error (step S25). Note that the specific method for notifying the user of the temperature error is the same as in the first pattern. Thereafter, the CPU 10 turns off the first light-emitting unit 151 (step S26) and ends the process. In this case, the CPU 10 controls the light-emitting drive device 16 so that power is not supplied to the second light-emitting unit 152 for pulse detection.On the other hand, if the temperature is not equal to or higher than the threshold value (step S24; NO), CPU 10 turns off first light-emitting unit 151 (step S27), then turns on second light-emitting unit 152 for pulse detection, and transitions from the first mode to a mode selected by the user (a second mode such as activity mode or sleep measurement mode) (step S27), and ends the process. In this case, the mode may transition to activity mode or sleep measurement mode with first light-emitting unit 151 still on.

[0029] The fourth pattern shown in FIG. 6 is an example of operational control when the watch 100 is not set to periodically detect whether or not the watch is being worn. In this case, the CPU 10 causes the temperature sensor 19 to perform temperature detection at long intervals. The "predetermined condition" is the passage of a predetermined interval (predetermined period T). That is, the CPU 10 periodically determines whether or not the predetermined period T has elapsed since the previous temperature detection (step S31). Here, the "predetermined period T" is, for example, every hour. Temperature detection requires checking whether the device body 1 (at least the area around the back cover) is heated by the light emitted by the light-emitting unit 15. Frequent temperature detection results in rapid battery drain. Therefore, the "predetermined period T" is preferably set to a value that does not affect battery life. If the predetermined period T has not elapsed since the previous temperature detection, the CPU 10 repeats the determination in step S31. On the other hand, if a predetermined period T has elapsed since the previous temperature detection (step S31; YES), the CPU 10 turns on the first light-emitting unit 151 (step S32) and causes the temperature detection sensor 19 to detect the temperature of the device main body 1 (at least around the back cover). The detection result (temperature information) by the temperature detection sensor 19 is acquired by the CPU 10 (step S33), and the CPU 10 determines whether the temperature is equal to or higher than a threshold value based on the acquired temperature information (step S34). If the temperature is not equal to or higher than the threshold value (step S34; NO), the process returns to step S31 and repeats. On the other hand, if the temperature is equal to or higher than the threshold value (step S34; YES), the CPU 10 notifies the user of a temperature error (step S35). Note that the specific method for notifying the user of a temperature error is the same as in the first pattern. Thereafter, the CPU 10 turns off the first light-emitting unit 151 (step S36) and ends the process. Also, although not shown in the figure, when a user inputs an instruction to the operation reception unit 13, etc., the CPU 10 may operate the light-emitting unit 15 in accordance with the input instruction, cause the temperature detection sensor 19 to acquire temperature information of the device main body 1 (at least around the back cover), and determine whether the temperature of the device main body 1 acquired by the temperature detection sensor 19 is above a threshold value.

[0030] As described above, in this embodiment, in any pattern, even when not acquiring biological information such as wearing / removing detection or pulse rate detection, such as in the activity mode or sleep measurement mode, before starting a full-scale detection operation, the first light-emitting unit 151 that emits infrared light is first turned on to check whether the device is generating heat. This allows the user to check without being aware of whether there is a risk of low-temperature burns, and if there is a risk of low-temperature burns, the user can be notified in advance.

[0031] As described above, the watch 100 as an electronic device according to this embodiment includes a temperature sensor 19 that acquires temperature information about the device body 1, a controlled unit, a CPU 10 as a processing unit, and a display unit 12 as an alarm unit. In this embodiment, the controlled unit is a biosensor 150 (light-emitting unit 15 and light-receiving unit 17) that includes at least a light-emitting unit 15 and is capable of acquiring biometric information. When the controlled unit is not operating and a predetermined condition is met, the CPU 10 activates (emits light) the controlled unit (at least the light-emitting unit 15), causes the temperature sensor 19 to acquire temperature information about the device body 1 (at least the area around the back cover), determines whether the temperature of the device body 1 acquired by the temperature sensor 19 is above a threshold, and if it is above the threshold, activates an alarm unit such as the display unit 12 to notify the user that the temperature is above the threshold. The device body 1, particularly the back cover, comes into direct contact with the user's skin when the watch 100 is worn. It is also expected that the watch 100 will be worn for an extended period of time. For this reason, if the temperature around the back cover rises, the user may suffer low-temperature burns. In this regard, by checking whether or not the watch is generating heat before starting full-scale detection operation, the user can avoid the risk of suffering low-temperature burns if they wear the watch 100 while it is generating heat, allowing the watch 100 to be used safely. Furthermore, only the first light-emitting unit 151 is operated for temperature detection, making it possible to acquire temperature information about the device main body 1 while minimizing power consumption. Note that it is sufficient for the CPU 10, which is the processing unit, to determine whether or not the temperature of the device main body 1 will rise by emitting (operating) light from the light-emitting unit 15, which is the controlled unit; it is not necessary for the CPU 10, which is the processing unit, to acquire biological information when emitting light from the light-emitting unit 15.

[0032] In addition, in this embodiment, the biosensor includes a sensor (first light-emitting element 151 and first light-receiving element 171) for detecting whether the timepiece 100 is worn or unworn using infrared light, and the CPU 10 activates at least the first light-emitting element 151 of the sensor for detecting wearing or unworn at times other than when biometric information is being acquired. This allows temperature detection to be performed without the user's knowledge. In other words, if the second light-emitting element 152 lights up in green or other colors during charging or other times when pulse detection or other such detection is not normally performed, this may cause the user to feel uncomfortable or suspect a malfunction. In this regard, the first light-emitting element 151 can be turned on without the user's knowledge, making it possible to check for a rise in temperature within the device body 1.

[0033] Furthermore, in the embodiment, the biosensor includes an attachment / detachment detection sensor (first light-emitting unit 151 and first light-receiving unit 171) that uses infrared light to detect attachment / detachment of the electronic device, and CPU 10 may cause temperature detection sensor 19 to acquire temperature information of device main body 1 (at least around the back cover) at the timing of attachment / detachment detection by the attachment / detachment detection sensor, and determine whether the temperature of device main body 1 acquired by temperature detection sensor 19 is equal to or higher than a threshold. When it is the timing of attachment / detachment detection, first light-emitting unit 151 constituting the attachment / detachment detection sensor is caused to emit light. By performing temperature detection by temperature detection sensor 19 at this timing, temperature detection can be performed efficiently.

[0034] Furthermore, in the embodiment, the electronic device may be charging at times other than when biometric information is being acquired. Charging is typically performed with the watch 100 removed from the user's wrist, so biometric information such as wear / removal detection and pulse detection is not acquired. However, if temperature detection is not performed during this time, there is a risk of the user suffering from low-temperature burns the next time they wear the watch 100. In this regard, by emitting light from the light-emitting unit 15 required for temperature detection even during charging to check for heat generation, the risk of the user unexpectedly suffering from low-temperature burns can be avoided.

[0035] Furthermore, in the embodiment, the timing other than the time of acquiring the biological information may be when the activity mode is set, but before transitioning to the activity mode. In this case, after the activity mode starts, biological information such as attachment / detachment detection and pulse detection is acquired as needed, and it is expected that the light-emitting unit 15 will continue to be ON. In this regard, in the present embodiment, by first turning on the light-emitting unit 15 to check for heat generation before transitioning to the activity mode, the risk of the user unknowingly suffering a low-temperature burn during an activity can be avoided.

[0036] Furthermore, in the embodiment, the timing other than the time of acquiring the biological information may be when the sleep mode is set but before transitioning to the sleep mode. In this case, after the sleep mode starts, biological information such as attachment / detachment detection and pulse detection is acquired as needed, and it is expected that the light-emitting unit 15 will continue to be ON. In this regard, in the present embodiment, by first illuminating the light-emitting unit 15 to check for heat generation before transitioning to the sleep mode, the risk of the user unknowingly suffering a low-temperature burn while sleeping can be avoided.

[0037] Furthermore, in an embodiment, the CPU 10 may operate the light-emitting unit 15 at predetermined intervals, have the temperature detection sensor 19 acquire temperature information about the device main body 1 (at least around the back cover), and determine whether the temperature of the device main body 1 acquired by the temperature detection sensor 19 is above a threshold. For example, if the setting that periodically performs wearing / detachment detection is turned off, there is a risk that the user may suffer low-temperature burns when trying to wear the watch 100 after leaving it unused for an extended period of time, without realizing that the device is generating heat. In this regard, even when the wearing / detachment detection setting is turned off, the risk of unexpected low-temperature burns can be avoided by having only the light-emitting unit 15 emit light at predetermined intervals to check for the presence or absence of heat generation.

[0038] In an embodiment, device main body 1 further includes operation reception unit 13, which is an operation unit operated by the user, and CPU 10 may operate light emitting unit 15 upon detecting an operation on operation reception unit 13, cause temperature detection sensor 19 to acquire temperature information of device main body 1 (at least around the back cover), and determine whether the temperature of device main body 1 acquired by temperature detection sensor 19 is above a threshold. This allows the user, if unsure whether device main body 1 is generating heat, to check for the presence or possibility of heat generation by operating the device themselves, allowing them to wear watch 100 with peace of mind.

[0039] The above-described embodiments are merely examples of the electronic device, electronic device control method, and program according to the present invention, and are not limited thereto. For example, a watch 100 is used as an example of the electronic device, but the present invention is not limited thereto. For example, the electronic device may be various wearable devices such as various smart watches or activity monitors. Furthermore, the electronic device may be any device that has a light-emitting unit and a light-receiving unit used for detecting whether the device is worn or not, and is not limited to devices capable of detecting pulse. Furthermore, the position where the electronic device is worn is not limited to the wrist.

[0040] Furthermore, in the embodiment, the case where the first light-emitting unit 151 for attaching / detaching detection, which emits infrared light when detecting temperature, is illuminated is illustrated, but the light-emitting unit 15 that is illuminated when detecting temperature is not limited to the first light-emitting unit 151 for attaching / detaching detection, and may be the second light-emitting unit 152 for pulse detection. As described above, if a malfunction such as a short circuit occurs in the light-emitting drive device 16, heat will be generated regardless of which light-emitting unit 15 is illuminated. Therefore, if any of the light-emitting units 15 is turned on to detect the temperature, it is possible to determine whether or not there is a risk of low-temperature burns from the detection result of the temperature detection sensor 19. For example, if the activity mode or sleep mode is set, it is likely that the watch 100 is already worn on the user's wrist. In this case, the user is unlikely to be surprised or feel uncomfortable when the green second light-emitting unit 152 for pulse detection emits light. In such a case, before starting full-scale, continuous sensing to detect (acquire) biometric information such as pulse rate, the second light-emitting unit 152 may first be made to emit light, and temperature detection sensor 19 may be used to detect the temperature, thereby determining whether or not the device main body 1 (particularly around the back cover) is generating heat.

[0041] In addition, in the embodiment, the case where the controlled unit is the biosensor 150 has been exemplified, but the controlled unit is not limited to this. The controlled unit broadly includes components that may generate heat due to a malfunction or the like.

[0042] In the above description, an example has been disclosed in which a nonvolatile memory is used as the computer-readable medium for the program according to the present invention, but the present invention is not limited to this example. Other computer-readable media may be used, such as information recording media including HDDs, SSDs, flash memories, and CD-ROMs. Furthermore, a carrier wave may also be used as a medium for providing data for the program according to the present invention via a communication line.

[0043] Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to the above-described embodiments, and may be formed by combining the elements of each embodiment, and includes the scope of the invention set forth in the claims and their equivalents. Furthermore, the detailed configuration and detailed operation of each component of the watch 100 as an electronic device in the above-described embodiments may, of course, be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0044] 1 Device body, 10 CPU (processing unit), 12 Display unit (notification unit), 19 Temperature detection sensor, 100 Clock (electronic device), 150 Biometric sensor (controlled unit)

Claims

1. a temperature information acquisition unit that acquires temperature information of the device body; A controlled unit; a processing unit; The notification department, Equipped with When a predetermined condition is satisfied at a timing when the controlled unit is not operating, the processing unit operates the controlled unit, causes the temperature information acquisition unit to acquire temperature information of the device main body, determines whether the temperature of the device main body acquired by the temperature information acquisition unit is equal to or higher than a threshold, and if it is equal to or higher than the threshold, operates the notification unit to notify that the temperature is equal to or higher than the threshold. An electronic device characterized by:

2. the controlled unit is a biosensor that includes a light-emitting unit and is capable of acquiring biometric information, The processing unit causes the light emitting unit to emit light when the predetermined condition is satisfied.

2. The electronic device according to claim 1, wherein:

3. the processing unit does not cause the light emitting unit to emit light while acquiring the biological information.

3. The electronic device according to claim 2.

4. the biosensor includes a first light-emitting unit that emits infrared light; the processing unit causes the first light-emitting unit to emit light when the predetermined condition is satisfied.

3. The electronic device according to claim 2.

5. the processing unit is capable of detecting attachment / detachment of the electronic device using the light-emitting unit, The predetermined condition is that the attachment / detachment detection is performed.

3. The electronic device according to claim 2.

6. The predetermined condition is that the electronic device is being charged.

3. The electronic device according to claim 2.

7. the predetermined condition is that the electronic device is switched from a first mode to a second mode, the processing unit, when the electronic device is set from the first mode to the second mode and the acquired temperature of the device body is equal to or lower than a threshold, transitions the electronic device from the first mode to the second mode; 3. The electronic device according to claim 2.

8. the second mode is an activity mode or a sleep mode, the first mode is a mode other than the activity mode and the sleep mode; 8. The electronic device according to claim 7,

9. The predetermined condition is that a predetermined interval has elapsed.

3. The electronic device according to claim 2.

10. the device body further includes an operation unit operated by a user, the processing unit operates the light emitting unit at a timing when an operation on the operation unit is detected, causes the temperature information acquiring unit to acquire temperature information of the device main body, and determines whether the temperature of the device main body acquired by the temperature information acquiring unit is equal to or higher than a threshold.

3. The electronic device according to claim 2.

11. When a predetermined condition is satisfied at a timing when the controlled unit is not operating, the controlled unit is operated; The temperature information acquisition unit acquires the temperature information of the device body, determining whether the temperature of the device body acquired by the temperature information acquisition unit is equal to or higher than a threshold, and if it is equal to or higher than the threshold, operating a notification unit to notify that the temperature is equal to or higher than the threshold; A method for controlling an electronic device.

12. For electronic devices, computers, A temperature information acquisition function that acquires the temperature information of the device itself, A processing function that operates the controlled unit; a state determination function for determining the temperature state of the device body; To achieve this, The state determination function, when a predetermined condition is satisfied at a timing when the controlled unit is not operating, operates the controlled unit by the processing function, determines whether the temperature of the device main body acquired by the temperature information acquisition function is equal to or higher than a threshold, and, if it is equal to or higher than the threshold, operates a notification unit to notify that the temperature is equal to or higher than the threshold. A program characterized by:

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