JP2017118172A - Electronic apparatus, electronic apparatus control method, control program, and control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of improving the communication quality of radio communication underwater.SOLUTION: An electronic apparatus comprises an enclosure, a first radio communication unit, an underwater detection unit, and a notification unit. The first radio communication unit performs first radio communication. The underwater detection unit detects an underwater state in which the enclosure is in the underwater. The notification unit notifies a user of warning information indicating a warning if the underwater detection unit detects the underwater state when the first radio communication unit performs the first radio communication.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electronic device.

  As described in Patent Document 1, various techniques have been proposed for electronic devices.

JP2012-074922A

  Wireless communication may be performed by a wireless communication unit included in the electronic device while the electronic device is in water. It is desired that the communication quality of such wireless communication is good.

  Therefore, the present invention has been made in view of the above points, and an object thereof is to provide a technique capable of improving the communication quality of underwater wireless communication.

  An electronic device, a control method of the electronic device, a control program, and a control device are disclosed. In one embodiment, an electronic device includes a housing, a first wireless communication unit, an underwater detection unit, and a notification unit. The first wireless communication unit performs first wireless communication. The underwater detection unit detects an underwater state in which the housing is in water. The notification unit notifies the user of warning information indicating a warning when the underwater state is detected by the underwater detection unit when the first wireless communication unit performs the first wireless communication.

  In one embodiment, the electronic device control method includes: a first step of performing wireless communication; a second step of detecting an underwater state in which the electronic device is in water; and And a third step of notifying the user of warning information indicating a warning when an underwater state is detected in two steps.

  In one embodiment, the control program is a control program for controlling an electronic device. The control program includes a first step for performing wireless communication with an electronic device, a second step for detecting an underwater state in which the electronic device is in water, and an underwater state is detected in the second step when wireless communication is performed. The third step of notifying the user of warning information indicating a warning is executed.

  In one embodiment, the control device is a control device for controlling an electronic device. The control device includes a storage unit and a processor. The storage unit stores a program. The processor executes a program to execute a first process for controlling wireless communication, a second process for detecting an underwater state in which the electronic device is underwater, and a second process when the wireless communication is performed. Is detected, a third process for notifying the user of warning information indicating a warning is executed.

  Communication quality of underwater wireless communication can be improved.

It is a perspective view which shows an example of the external appearance of an electronic device. It is a rear view which shows an example of the external appearance of an electronic device. It is a figure which shows an example of the electrical constitution of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a figure which shows an example of a warning screen. It is a figure which shows an example of a warning screen. It is a flowchart which shows an example of operation | movement of an electronic device. It is a figure which shows an example of a warning screen. It is a figure which shows an example of a warning screen. It is a figure for demonstrating the shift | offset | difference of the resonant frequency of the antenna in underwater state. It is a figure which shows an example of the resonant frequency of each antenna. It is a figure which shows an example of the electrical constitution of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a figure which shows an example of the electrical constitution of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a flowchart which shows an example of operation | movement of an electronic device. It is a rear view which shows an example of the external appearance of an electronic device.

<First Example of Embodiment>
<Appearance of electronic equipment>
1 and 2 are a perspective view and a rear view showing an example of the external appearance of the electronic device 1, respectively. The electronic device 1 is, for example, a mobile phone such as a waterproof smartphone.

  As shown in FIGS. 1 and 2, the electronic device 1 includes a cover panel 2 positioned on the front surface 1 a of the electronic device 1 and a device case 3 to which the cover panel 2 is attached. The cover panel 2 and the device case 3 form an exterior of the electronic device 1 and constitute a housing 4 of the electronic device 1. The shape of the electronic device 1 is, for example, a substantially rectangular plate shape in plan view.

  The cover panel 2 is provided with a display area 2a on which various information such as characters, symbols, and figures displayed by the display unit 150 described later is displayed. Most of the peripheral edge portion 2b surrounding the display area 2a in the cover panel 2 is black, for example, by applying a film or the like. Thereby, most of the peripheral edge 2b of the cover panel 2 is a non-display area in which various information displayed on the display unit 150 is not displayed.

  A touch sensor 160 described later is attached to the back surface of the display area 2a. And the display part 150 is attached to the surface on the opposite side to the surface by the side of the display area 2a in the touch sensor 160. FIG. That is, the display unit 150 is attached to the back surface of the display area 2 a via the touch sensor 160. Accordingly, the user can give various instructions to the electronic device 1 by operating the display area 2a with an operator such as a finger.

  Note that the positional relationship between the touch sensor 160 and the display unit 150 is not limited to the above-described relationship. For example, a configuration in which a part or all of the configuration of the touch sensor 160 is embedded in the display unit 150 may be used as long as an operation by the operator on the display area 2a can be detected.

  As shown in FIG. 1, a receiver hole 20 is provided at the upper end of the cover panel 2. Further, from the upper end portion of the cover panel 2, an imaging lens 21 included in a front side imaging unit 210 described later can be visually recognized. A speaker hole 19 is provided at the lower end of the cover panel 2. A microphone hole 18 is provided on the bottom surface 1 c of the electronic device 1, that is, on the bottom surface (lower side surface) of the device case 3.

  As shown in FIG. 2, an imaging lens 22 included in a back-side imaging unit 220 described later is visible from the back surface 1 b of the electronic device 1, that is, the upper end portion of the back surface of the device case 3.

  Inside the device case 3, an operation button group 170 including a plurality of operation buttons 17 is provided. Each operation button 17 is a hardware button such as a push button. The operation buttons are sometimes called “operation keys” or “keys”. Each operation button 17 is exposed from, for example, the lower end of the cover panel 2. The user can give various instructions to the electronic device 1 by operating each operation button 17 with a finger or the like.

  The plurality of operation buttons 17 include, for example, a home button, a back button, and a history button. The home button is an operation button for displaying a home screen (initial screen) in the display area 2a. The back button is an operation button for switching the screen displayed in the display area 2a to the previous screen. The history button is an operation button for displaying a list of applications executed on the electronic device 1 in the display area 2a.

<Electrical configuration of electronic equipment>
FIG. 3 is a block diagram illustrating an example of an electrical configuration of the electronic device 1. As shown in FIG. 3, the electronic device 1 includes a control unit 100, a first wireless communication unit 110, a second wireless communication unit 120, a third wireless communication unit 130, a notification unit 140, a touch sensor 160, and a group of operation buttons. 170 is provided. Further, the electronic device 1 is provided with a microphone 180, an external speaker 190, a receiver 200, a front side imaging unit 210, a back side imaging unit 220, an underwater detection unit 230, and a battery 250. Each of these components provided in the electronic device 1 is housed in the device case 3.

  The control unit 100 is a kind of arithmetic processing device, and includes, for example, a processor such as a CPU (Central Processing Unit) 101 and a DSP (Digital Signal Processor) 102 which are electric circuits, a storage unit 103, and the like. The control unit 100 can comprehensively manage the operation of the electronic device 1 by controlling other components of the electronic device 1. The control unit 100 may further include a sub-processing device (co-processor) such as a system-on-a-chip (SoC), a micro control unit (MCU), and a field-programmable gate array (FPGA). Further, the control unit 100 may perform various controls by causing both the CPU and the sub-processing device to cooperate or selectively using one of the both.

  The storage unit 103 includes a non-transitory recording medium that can be read by the CPU 101 and the DSP 102, such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The storage unit 103 stores a main program and a plurality of application programs for controlling the electronic device 1. Various functions of the control unit 100 are realized by the CPU 101 and the DSP 102 executing various programs in the storage unit 103, for example.

  Note that the storage unit 103 may include a computer-readable non-transitory recording medium other than the ROM and RAM. The storage unit 103 may include, for example, a small hard disk drive and an SSD (Solid State Drive). Further, all the functions of the control unit 100 or a part of the functions of the control unit 100 may be realized by hardware that does not require software for realizing the functions.

  A first antenna 111 is connected to the first wireless communication unit 110. The first wireless communication unit 110 can perform wireless communication with a communication terminal such as a mobile phone different from the electronic device 1 via the first antenna 111. The wireless communication performed by the first wireless communication unit 110 is wireless communication directly performed by the electronic device 1 and a communication terminal different from the electronic device 1 without using a communication device such as a base station. , Bluetooth (registered trademark) standard, or NFC (Near field communication) standard. Note that the wireless communication performed by the first wireless communication unit 110 may be wireless communication according to WiFi (Wireless Fidelity) without using a communication device such as an access point.

  A second antenna 121 is connected to the second wireless communication unit 120. The second wireless communication unit 120 receives, for example, a signal from a mobile phone different from the electronic device 1 or a signal from a communication device such as a web server connected to the Internet via the base station or the like. Can be received. A transmission signal from the second antenna 121 is received via a base station by a communication device such as a mobile phone other than the electronic device 1 or a web server connected to the Internet. The wireless communication performed by the second wireless communication unit 120 is, for example, wireless communication using a so-called mobile communication network, and is wireless according to a communication method such as LTE (Long Term Evolution) or UMTS (Universal Mobile Telecommunication System). Communication. The communication area of the second wireless communication unit 120 is wider than the communication area of the first wireless communication unit 110, for example.

  The second wireless communication unit 120 can perform amplification processing and down-conversion on the signal received by the second antenna 121 and output the result to the control unit 100. The control unit 100 can perform demodulation processing or the like on the input reception signal and acquire information such as a sound signal indicating voice or music included in the reception signal. The second wireless communication unit 120 can perform up-conversion and amplification processing on the transmission signal generated by the control unit 100 and wirelessly transmit the processed transmission signal from the second antenna 121. is there.

  A third antenna 131 is connected to the third wireless communication unit 130. The third wireless communication unit 130 can receive a signal indicating the current position of the electronic device 1 via the third antenna 131. The third wireless communication unit 130 is a device using, for example, GPS (Global Positioning System). The third wireless communication unit 130 can receive a GPS signal from a GPS satellite and obtain position information indicating the current position of the electronic device 1 based on the GPS signal. The position information includes, for example, latitude information and longitude information.

  Hereinafter, for convenience of explanation, the first wireless communication unit 110, the second wireless communication unit 120, and the third wireless communication unit 130 are referred to as “short-range wireless communication unit 110”, “mobile communication unit 120”, and “position information”, respectively. It may be referred to as “communication unit 130”. In addition, the wireless communication performed by the first wireless communication unit 110, the second wireless communication unit 120, and the third wireless communication unit 130 is referred to as “short-range wireless communication”, “mobile communication”, and “location information communication”, respectively. Sometimes. Further, when there is no need to particularly distinguish the first wireless communication unit 110, the second wireless communication unit 120, and the third wireless communication unit 130, each may be referred to as a “wireless communication unit”.

  The notification unit 140 can notify the user of various types of information by, for example, sound, light, vibration, or the like. The notification unit 140 includes a display unit 150.

  The display unit 150 is, for example, a liquid crystal panel or an organic EL panel. The display unit 150 can display various types of information such as characters, symbols, and figures under the control of the control unit 100. Various information displayed on the display unit 150 is displayed in the display area 2 a of the cover panel 2.

  The touch sensor 160 can detect an operation by an operator such as a finger on the display area 2 a of the cover panel 2. The touch sensor 160 is, for example, a projected capacitive touch panel. When the user operates the display area 2 a of the cover panel 2 with an operator such as a finger, an operation signal corresponding to the operation is input from the touch sensor 160 to the control unit 100. Based on the operation signal from the touch sensor 160, the control unit 100 can specify the content of the operation performed on the display area 2a and perform processing corresponding to the content. Note that the user can also give various instructions to the electronic device 1 by operating the display area 2a with an operator other than a finger, for example, an electrostatic touch panel pen such as a stylus pen.

  When each operation button 17 in the operation button group 170 is operated by the user, an operation signal indicating that the operation button 17 is operated can be output to the control unit 100. Accordingly, the control unit 100 can determine whether or not the operation button 17 has been operated based on the operation signal from each operation button 17. The control unit 100 can perform processing according to the operated operation button 17. Each operation button 17 may be a software button displayed in the display area 2a instead of a hardware button such as a push button. In this case, an operation on the software button is detected by the touch sensor 160, and the control unit 100 can perform processing according to the operated software button.

  The microphone 180 can convert sound input from the outside of the electronic device 1 into an electrical sound signal and output the electrical sound signal to the control unit 100. Sound from the outside of the electronic device 1 is taken into the electronic device 1 from the microphone hole 18 provided on the bottom surface (lower bottom surface) of the device case 3 and is input to the microphone 180, for example.

  The external speaker 190 is a dynamic speaker, for example. The external speaker 190 can convert an electrical sound signal from the control unit 100 into a sound and output the sound. The sound output from the external speaker 190 is output to the outside of the electronic device 1 from the speaker hole 19 provided at the lower end of the cover panel 2, for example. The sound output from the speaker hole 19 has a volume that can be heard at a place away from the electronic device 1.

  The receiver 200 is composed of, for example, a dynamic speaker. The receiver 200 can convert an electrical sound signal from the control unit 100 into a sound and output the sound. For example, the receiver 200 can output a received sound. The sound output from the receiver 200 is output to the outside through, for example, the receiver hole 20 provided at the upper end of the cover panel 2. The volume of the sound output from the receiver hole 20 is lower than the volume of the sound output from the external speaker 190 via the speaker hole 19, for example.

  Instead of the receiver 200, a piezoelectric vibration element may be provided. The piezoelectric vibration element can vibrate based on an audio signal from the control unit 100. The piezoelectric vibration element is provided on the back surface of the cover panel 2, for example, and can vibrate the cover panel 2 by its own vibration based on an audio signal. Then, when the user brings his / her ear close to the cover panel 2, the vibration of the cover panel 2 is transmitted to the user as sound. When a piezoelectric vibration element is provided instead of the receiver 200, the receiver hole 20 is not necessary.

  The front side imaging unit 210 includes the imaging lens 21 and an imaging element. The imaging lens 21 is visible from the upper end of the front surface 1 a of the electronic device 1. Therefore, the front-side imaging unit 210 can image an object present on the front surface 1a side of the electronic device 1.

  The back side imaging unit 220 includes an imaging lens 22 and an imaging element. The imaging lens 22 is visible from the upper end of the back surface 1 b of the electronic device 1. Therefore, the back side imaging unit 220 can image an object present on the back side 1b side of the electronic device 1.

  Each of the front-side imaging unit 210 and the rear-side imaging unit 220 can capture a subject under the control of the control unit 100, generate a still image or a moving image indicating the captured subject, and output the still image or moving image to the control unit 100. is there.

  The underwater detection unit 230 can detect a state in which the housing 4 is in water, that is, a state in which the electronic device 1 is in water. Hereinafter, such a state is also referred to as an “underwater state”. Further, a state where the housing 4 is not in water, that is, a state where the electronic device 1 is not underwater is also referred to as a “non-underwater state”. In the present specification, the non-underwater state means a state where the casing 4 is in the atmosphere, that is, a state where the electronic device 1 is in the atmosphere. The underwater state can occur, for example, when the user holds the electronic device 1 by hand and puts the electronic device 1 into the water. In addition, as the objective of putting the electronic device 1 in water, underwater photography using the front side imaging unit 210 and the back side imaging unit 220 of the electronic device 1 can be assumed, for example. The underwater detection unit 230 may be configured by, for example, the pressure sensor 240 and the control unit 100.

  For example, the pressure sensor 240 can measure the pressure of gas or liquid with a pressure sensitive element via a member such as a stainless diaphragm or a silicon diaphragm, convert the measured value into an electric signal, and output the electric signal to the control unit 100. is there. The control unit 100 can determine the pressure value based on the electrical signal input from the pressure sensor 240. The control unit 100 can detect a state in which the housing 4 is in water according to the determined pressure value. Specifically, for example, when the determined pressure value exceeds a predetermined threshold, the control unit 100 may detect a state where the housing 4 is in water. The predetermined threshold value may be appropriately set to the pressure value by, for example, measuring in advance a pressure value determined by the control unit 100 when the housing 4 is in water.

  The underwater detection unit 230 may detect the underwater state using a capacitance sensor capable of detecting a capacitance instead of the pressure sensor 240. The capacitance sensor can measure the capacitance, convert the measured capacitance value into an electric signal, and output the electric signal to the control unit 100. The control unit 100 can determine the capacitance value based on the electrical signal input from the capacitance sensor. For example, the control unit 100 can detect a state in which the housing 4 is in water according to the determined capacitance value. For example, when the determined capacitance value exceeds a predetermined threshold, the control unit 100 may detect a state in which the housing 4 is in water. The predetermined threshold value may be appropriately set to the capacitance value by, for example, measuring in advance the capacitance value determined by the control unit 100 when the housing 4 is in water. The touch sensor 160 may be used as a sensor capable of detecting the capacitance. Further, the underwater detection unit 230 may detect the underwater state using both the pressure sensor 240 and the capacitance sensor.

  The battery 250 can output the power of the electronic device 1. The battery 250 is a rechargeable battery such as a lithium ion secondary battery. The battery 250 can supply power to various electronic components such as the control unit 100 and the first wireless communication unit 110 included in the electronic device 1.

<About wireless communication underwater>
In the electronic device 1, the wireless communication unit may perform wireless communication in an underwater state. For example, an image obtained by underwater photography may be transmitted by short-range wireless communication in an underwater state. Such near field communication in the underwater state is performed in a state where the communication terminal to be communicated is in the water or in a state where the communication terminal is not in the water. In the electronic device 1, for example, the mobile communication unit 120 may receive a call in an underwater state, or the position information communication unit 130 may receive position information.

  Here, when radio waves propagate in water, the attenuation rate may be larger than when they propagate in air. Therefore, the wireless communication performed by the wireless communication unit in the underwater state may have lower communication quality than the wireless communication performed by the wireless communication unit in the non-underwater state.

  Therefore, in the electronic device 1, when the wireless communication unit performs wireless communication in the underwater state, warning information indicating a warning is notified to the user. Hereinafter, this operation will be described in detail.

<Example of warning information notification operation>
FIG. 4 is a flowchart illustrating an example of the operation of the electronic device 1 that notifies the warning information. In step S1, the control unit 100 determines whether or not the electronic device 1 performs wireless communication. For example, the control unit 100 determines that the electronic device 1 performs wireless communication when at least one of the short-range wireless communication unit 110, the mobile communication unit 120, and the position information communication unit 130 performs wireless communication.

  If it is determined in step S1 that wireless communication is performed, step S2 is executed. On the other hand, when it is determined in step S1 that wireless communication is not performed, step S1 is executed again.

  In step S <b> 2, the control unit 100 determines whether or not it is in an underwater state based on an electrical signal input from a sensor such as a pressure sensor or a capacitance sensor (hereinafter, “the control unit 100 is simply It is also referred to as “determining whether or not it is in a state. If it is determined in step S2 that the underwater state is present, that is, if the underwater state is detected by the underwater detection unit 230, step S3 is executed. On the other hand, when it is determined in step S2 that the underwater state is not detected, that is, when the underwater state is not detected by the underwater detection unit 230, step S2 is executed again. That is, after it is determined in step S1 that wireless communication is performed, step S2 is repeatedly executed until it is determined in step S2 that it is in the underwater state. Such processing of step S2 is performed at predetermined time intervals, for example.

  In step S3, the notification unit 140 notifies the user of warning information indicating a warning. For example, the control unit 100 notifies the user by controlling the display unit 150 so that the warning information is displayed in the display area 2a.

  FIG. 5 is a diagram showing an example of a warning screen 400 including warning information 300 displayed in the display area 2a. In the example of FIG. 5, as the warning information 300, a character string 301 “Communication quality is degraded underwater” is displayed. Thereby, the user can know that the communication quality of the wireless communication which a wireless communication part performs falls in an underwater state. In the example of FIG. 5, the warning screen 400 includes a remaining battery level icon 401 indicating the current capacity of the battery 250, a current time 402, and a reception status icon ( 403) (also called a radio wave status icon) is shown.

  The warning information 300 may include communication improvement information for improving communication quality of wireless communication performed by the wireless communication unit. FIG. 6 is a diagram illustrating an example of a warning screen 400 on which warning information 300 including communication improvement information is displayed. In the example of FIG. 6, a character string 302 “Please take the terminal out of the water” is displayed as the warning information 300. Thereby, the user can improve the communication quality of the wireless communication which a wireless communication part performs by taking out the electronic device 1 from underwater. The warning screen 400 may include both warning information 300 as shown in FIGS.

  The communication improvement information may not be information that prompts the user to take out the electronic device 1 from the water, but may be information for improving the communication quality of the wireless communication performed by the wireless communication unit in the underwater state. For example, the communication quality in the underwater state is improved by reducing the inter-terminal distance between the electronic device 1 and the communication terminal to be communicated in short-range wireless communication, not by taking the electronic device 1 out of the water. be able to. In mobile communication and position information communication, the communication quality in the underwater state can be improved by bringing the underwater electronic device 1 closer to the water surface.

  FIG. 7 is a flowchart illustrating an example of the operation of the electronic device 1 that notifies communication improvement information for improving the communication quality of wireless communication performed by the wireless communication unit while in an underwater state.

  In step S11, the control unit 100 determines whether or not the electronic device 1 performs wireless communication. For example, the control unit 100 determines that the electronic device 1 performs wireless communication when at least one of the short-range wireless communication unit 110, the mobile communication unit 120, and the position information communication unit 130 performs wireless communication.

  If it is determined in step S11 that wireless communication is performed, step S12 is executed. On the other hand, when it is determined in step S11 that wireless communication is not performed, step S11 is executed again.

  In step S12, the control unit 100 determines whether or not it is in an underwater state. If it is determined in step S12 that the underwater state is present, that is, if the underwater state is detected by the underwater detection unit 230, step S13 is executed. On the other hand, if it is determined in step S12 that the underwater state is not met, that is, if the underwater state is not detected by the underwater detection unit 230, step S12 is executed again. That is, after it is determined in step S11 that wireless communication is performed, step S12 is repeatedly executed until it is determined in step S12 that it is in the underwater state. Such processing in step S12 is performed at predetermined time intervals, for example.

  In step S <b> 13, the control unit 100 determines whether the wireless communication performed by the electronic device 1 is short-range wireless communication. If it is determined in step S13 that the wireless communication is near field communication, step S14 is executed. In step S <b> 14, the notification unit 140 notifies the user of warning information 300 that prompts the distance between the electronic device 1 and the communication terminal to be communicated to be reduced. For example, the control unit 100 notifies the user of the warning information 300 by controlling the display unit 150 to display the warning screen 400 including the warning information 300. FIG. 8 is a diagram illustrating an example of a warning screen 400 including the warning information 300. In the example of FIG. 8, a character string 303 “Please bring the terminals closer to each other” is displayed as the warning information 300. Thereby, the user can improve the communication quality of the short-distance wireless communication in the underwater state by reducing the distance between the electronic device 1 and the communication terminal to be communicated.

  On the other hand, if it is determined in step S13 that the wireless communication is not near field communication, step S15 is executed. In step S15, the notification unit 140 notifies the user of warning information 300 that prompts the electronic device 1 to approach the water surface. For example, the control unit 100 notifies the user of the warning information 300 by controlling the display unit 150 to display the warning screen 400 including the warning information 300. FIG. 9 is a diagram illustrating an example of a warning screen 400 including the warning information 300. In the example of FIG. 9, a character string 304 “Please bring your terminal close to the water surface” is displayed as the warning information 300. Thereby, the user can improve the communication quality of radio | wireless communication, such as a mobile communication in an underwater state, position information reception, by bringing the electronic device 1 close to the water surface.

  The warning information 300 is notified, for example, while the wireless communication unit is performing wireless communication and the underwater state is detected by the underwater detection unit 230. For example, the warning information 300 is not notified when the underwater state is no longer detected by the underwater detection unit 230. The warning information 300 may not be notified by a predetermined operation of the user, or may not be notified after a predetermined time has elapsed.

  The warning information 300 is not notified when the underwater detection unit 230 detects the underwater state when the wireless communication unit performs wireless communication, but the underwater state is detected when the wireless communication unit performs wireless communication. And may be notified when the communication quality of the wireless communication is low. For example, the warning information 300 may be notified when an underwater state is detected when the wireless communication unit performs wireless communication and the signal strength in the wireless communication is a predetermined value or less. In this case, the warning information 300 may not be notified when the signal strength in wireless communication becomes larger than a predetermined value.

  Note that the notification unit 140 may notify the warning information not by a character string displayed by the display unit 140 but by a symbol or a graphic displayed by the display unit 140. In addition, the notification unit 140 may notify the user of warning information other than the warning screen 400. For example, the warning information may be notified to the user by a sound output from a sound output unit such as the external speaker 190. In this case, a plurality of types of warning information may be notified depending on the type of sound to be output.

  In addition, when the electronic device 1 includes a notification lamp configured by an LED or the like, warning information may be notified to the user by light output from the notification lamp. In this case, a plurality of types of warning information may be notified depending on the color of the output light, the light emission pattern, and the like.

  Further, when the electronic device 1 includes a vibration unit configured by a piezoelectric vibration element, a motor, or the like, the vibration unit may notify the user of warning information by vibrating the electronic device 1. In this case, a plurality of types of warning information may be notified according to vibration patterns, vibration amounts, and the like.

  In each of the above examples, the electronic device 1 notifies the warning information. However, when the electronic device 1 performs short-range wireless communication, a communication terminal that is a communication target may notify the warning information. For example, the electronic device 1 may transmit the underwater state detection result in the underwater detection unit 230 to a communication terminal that is a communication target. The communication terminal may notify the warning information based on the received underwater state detection result. When the communication terminal includes an underwater detection unit, the underwater detection result from the underwater detection unit may be transmitted to the electronic device 1. The electronic device 1 may notify the warning information by the notification unit 140 based on the received underwater detection result.

<Second Example of Embodiment>
<Resonant frequency of antenna>
Each of the short-range wireless communication unit 110, the mobile communication unit 120, and the location information communication unit 130 performs wireless communication using, for example, different frequency bands.

  For example, the short-range wireless communication unit 110 performs short-range wireless communication in accordance with the Bluetooth (registered trademark) standard in the 2.4 GHz band. In this case, the first antenna 111 has a configuration suitable for wireless communication in the 2.4 GHz band. The mobile communication unit 120 performs mobile communication according to LTE in the 700 MHz band, for example. In this case, the second antenna 121 has a configuration suitable for wireless communication in the 700 MHz band. The position information communication unit 130 receives a GPS signal in a 1575.42 MHz band (hereinafter, sometimes referred to as “1.5 GHz band”), for example. In this case, the third antenna 131 has a configuration suitable for wireless communication in the 1.5 GHz band.

  An antenna suitable for wireless communication in a relatively low frequency band such as the 700M band to 900 MHz band is also referred to as a “LowBand antenna”. An antenna suitable for wireless communication in a relatively high frequency band such as the 1700 MHz band to 2600 MHz band is also referred to as a “High Band antenna”.

  Here, “the antenna is suitable for wireless communication in a predetermined frequency band” means, for example, that the resonance frequency of the antenna is set to be suitable for wireless communication in the predetermined frequency band. For example, the antenna is configured such that its resonance frequency is close to a predetermined frequency band. The resonance frequency of the antenna may be included in a predetermined frequency band. Further, “an antenna is suitable for wireless communication in a predetermined frequency band” means, for example, that the antenna is configured to obtain desired communication quality in wireless communication in a predetermined frequency band. For example, the antenna may be configured such that the signal intensity transmitted or received by the wireless communication unit is equal to or higher than a predetermined value, or the VSWR (Voltage Standing Wave Ratio) in a predetermined frequency band is equal to or lower than a predetermined value. It may be configured.

  The resonance frequency of the antenna in the underwater state may be lower than the resonance frequency of the antenna in the non-underwater state. For this reason, the antenna is configured such that, for example, the resonance frequency thereof is suitable for wireless communication in a predetermined frequency band in a non-underwater state.

  FIG. 10 is a diagram for explaining a shift in the resonance frequency of the antenna in an underwater state. In the example of FIG. 10, a graph 500 showing VSWR in a non-underwater state and a graph 501 showing VSWR in an underwater state are shown. In addition, the resonance frequency fw of the antenna in the underwater state and the resonance frequency fa of the antenna in the non-underwater state are shown. The resonance frequencies fa and fw indicate, for example, resonance frequencies at a first harmonic (fundamental wave) described later.

  In the second antenna 121, the resonance frequency fa is, for example, 700 MHz. Accordingly, the second antenna 121 in a non-underwater state is suitable for wireless communication in the 700 MHz band. On the other hand, the resonance frequency fw is 490 MHz, for example, and is lower than the resonance frequency fa. Therefore, when the mobile communication unit 120 performs wireless communication in the 700 MHz band using the second antenna 121 in the underwater state, the communication quality is lower than that in the non-underwater state.

  Such a shift amount of the resonance frequency varies depending on the configuration of the electronic apparatus 1 such as the position of the antenna in the housing 4. Therefore, the ratio of the shift amount of the resonance frequency in antennas having the same configuration is almost the same. When the ratios of the resonance frequency shift amounts in the first antenna 111, the second antenna 121, and the third antenna 131 are the same and the resonance frequency fa of the first antenna 111 is 2.4 GHz, the first antenna The resonance frequency fw of 111 is 1.68 (= 2.4 × 490/700) GHz. Therefore, when the short-range wireless communication unit 110 performs wireless communication in the 2.4 GHz band using the first antenna 111 in the underwater state, the communication quality is lower than that in the non-underwater state. To do.

  Similarly, when the resonance frequency fa of the third antenna 131 is 1.5 GHz, the resonance frequency fw of the third antenna 131 is 1.05 (= 1.5 × 490/700) GHz. Therefore, when the location information communication unit 130 performs wireless communication in the 1.5 GHz band using the third antenna 131 in the underwater state, the communication quality is lower than that in the non-underwater state. .

  As described above, in a state where the communication quality of the wireless communication is deteriorated due to the low resonance frequency of the antenna in the underwater state, by reducing the distance between terminals in the short-range wireless communication, or mobile communication and position information The communication quality of underwater wireless communication may not be sufficiently improved by bringing the electronic device 1 close to the water surface in each communication.

  Therefore, in the electronic device 1, the communication quality of wireless communication in the underwater state is improved by switching the antenna used by the wireless communication unit to a more suitable antenna in the underwater state. Hereinafter, such antenna switching will be described in detail.

<Resonant frequency at nth harmonic>
The antenna has a plurality of resonance frequencies at n (n is an odd number equal to or greater than 1) harmonic. Therefore, wireless communication can be performed using not only the resonance frequency at the 1st harmonic (fundamental wave) but also the resonance frequency at higher harmonics such as the 3rd harmonic and the 5th harmonic. FIG. 11 is a diagram illustrating an example of the resonance frequency in each of the first antenna 111, the second antenna 121, and the third antenna 131. In the example of FIG. 11, the resonance frequency in the non-underwater state and the resonance frequency in the underwater state are shown. As the resonance frequency in the non-water state, a resonance frequency fa1 at the 1st harmonic, a resonance frequency fa3 at the 3rd harmonic, and a resonance frequency fa5 at the 5th harmonic are shown. The resonance frequency in the underwater state is shown as a resonance frequency fw1 at the 1st harmonic, a resonance frequency fw3 at the 3rd harmonic, and a resonance frequency fw5 at the 5th harmonic.

  As illustrated in FIG. 11, the resonance frequencies fa1, fa3, and fa5 in the first antenna 111 in the non-underwater state are, for example, 2.4 GHz, 7.2 GHz, and 12 GHz. In addition, the resonance frequencies fw1, fw3, and fw5 of the first antenna 111 in the underwater state are, for example, 1.68 GHz, 5.04 GHz, and 8.4 GHz.

  Resonant frequencies fa1, fa3, and fa5 in the second antenna 121 in the non-underwater state are, for example, 700 MHz, 2.1 GHz, and 3.5 GHz. Further, for example, the resonance frequencies fw1, fw3, and fw5 of the second antenna 121 in the underwater state are, for example, 490 MHz, 1.47 GHz, and 2.45 GHz.

  Resonant frequencies fa1, fa3, and fa5 in the third antenna 131 in the non-underwater state are, for example, 1.5 GHz, 4.5 GHz, and 7.5 GHz. Further, for example, the resonance frequencies fw1, fw3, and fw5 of the third antenna 131 in the underwater state are 1.05 GHz, 3.15 GHz, and 5.25 GHz, respectively.

  11, the first harmonic resonance frequency (2.4 GHz) in the first antenna 111 in the non-underwater state is equal to the third harmonic resonance frequency (2. 1 GHz) and 5th harmonic resonance frequency (3.5 GHz), 1st harmonic resonance frequency (1.5 GHz) and 3rd harmonic resonance frequency (4.5 GHz) in the third antenna 131 in a non-water state Is close to the communication frequency band (2.4 GHz) for short-range wireless communication. Therefore, the first antenna 111 in the non-underwater state is more suitable for short-range wireless communication than the second antenna 121 and the third antenna 131 in the non-underwater state.

  Further, the resonance frequency (700 MHz) of the first harmonic in the second antenna 121 in the non-underwater state is the resonance frequency (2.4 GHz) of the first harmonic in the first antenna 111 in the non-underwater state. It is closer to the communication frequency band (700 MH) in mobile communication than the resonance frequency (1.5 GHz) of the first harmonic wave in the third antenna 131. Therefore, the second antenna 121 in the non-underwater state is more suitable for short-range wireless communication than the first antenna 111 and the third antenna 131 in the non-underwater state.

  Further, the resonance frequency (1.5 GHz) of the first harmonic wave in the third antenna 131 in the non-water state is the resonance frequency (2.4 GHz) of the first harmonic wave in the first antenna 111 in the non-water state. The second antenna 121 in FIG. 2 is closer to the communication frequency band (1.5 GHz) in position information communication than the resonance frequency (700 MHz) of the first harmonic and the resonance frequency (2.1 GHz) of the third harmonic. Therefore, the third antenna 131 in the non-underwater state is more suitable for position information communication than the first antenna 111 and the second antenna 121 in the non-underwater state.

  On the other hand, the resonance frequency (1.47 GHz) of the third harmonic in the second antenna 121 in the underwater state is the resonance frequency (1.68 GHz) of the first harmonic in the first antenna 111 in the underwater state. It is closer to the communication frequency band (1.5 GHz) in position information communication than the resonance frequency (1.05 GHz) of the first harmonic and the resonance frequency (3.15 GHz) of the third harmonic in the three antennas 131. Therefore, the second antenna 121 in the underwater state is more suitable for position information communication than the first antenna 111 and the third antenna 131 in the underwater state.

  The resonance frequency of the fifth harmonic in the second antenna 121 in the underwater state (2.45 GHz) is the resonance frequency of the first harmonic in the first antenna 111 in the underwater state (1.68 GHz) and the resonance of the third harmonic. Communication frequency in short-range wireless communication than the frequency (5.04 GHz), the first harmonic resonance frequency (1.05 GHz) and the third harmonic resonance frequency (3.15 GHz) in the third antenna 131 in the underwater state Close to the band (2.4 GHz). Therefore, the second antenna 121 in the underwater state is more suitable for position information communication than the first antenna 111 and the third antenna 131 in the underwater state.

  As described above, when the antenna is configured to be suitable for wireless communication in a predetermined frequency band in a non-underwater state, it may not be suitable for the wireless communication in the underwater state. An antenna that is not suitable for wireless communication in a predetermined frequency band in a non-underwater state may be suitable for the wireless communication in an underwater state.

  Therefore, in the electronic device 1, in the underwater state, the antenna connection destination is switched to a more suitable wireless communication unit. Hereinafter, such an antenna switching operation will be described in detail.

<Example of antenna switching operation>
FIG. 12 is a block diagram illustrating an example of the electrical configuration of the electronic device 1 that switches the antenna connection destination. In FIG. 12, the illustration of the same part as the electrical configuration shown in FIG. 4 is omitted. In the example of FIG. 12, the electronic device 1 further includes a switching unit 260.

  The switching unit 260 can be controlled by the control unit 100 to switch between connecting the second antenna 121 to the short-range wireless communication unit 110 or connecting to the mobile communication unit 120.

  FIG. 13 is a flowchart illustrating an example of the operation of the electronic device 1 that performs the antenna switching operation. In step S21, the switching unit 260 connects the second antenna 121 to the second wireless communication unit 120 (mobile communication unit 120). In the initial state, the second antenna 121 is connected to the mobile communication unit 120. In this case, the mobile communication unit 120 can perform mobile communication using the second antenna 121.

  In step S22, the control unit 100 determines whether or not the underwater state. If it is determined in step S22 that the underwater state is present, that is, if the underwater state is detected by the underwater detection unit 230, step S23 is executed. On the other hand, when it is determined in step S22 that the underwater state is not detected, that is, when the underwater state is not detected by the underwater detection unit 230, step S21 is executed again. That is, the second antenna 121 is connected to the mobile communication unit 120 until it is determined in step S22 that it is in the underwater state.

  In step S23, the switching unit 260 connects the second antenna 121 to the first wireless communication unit 110 (short-range wireless communication unit 110). Therefore, the short-range wireless communication unit 110 can perform short-range wireless communication using the second antenna 121. As described above, in the underwater state, the second antenna 121 is more suitable for short-range wireless communication than the first antenna 111. Therefore, the communication quality of short-range wireless communication in the underwater state can be improved.

  Further, the second antenna 121 used for mobile communication in a non-underwater state can be used for short-range wireless communication in an underwater state. Therefore, with a simple configuration of switching the connection destination of the second antenna 121, it is possible to improve the communication quality of short-range wireless communication in an underwater state without adding a matching circuit, for example.

  When step S23 is executed, step S22 is executed again.

  For example, the first antenna 111 is connected to the short-range wireless communication unit 110 regardless of the determination result of the underwater state. In this case, the short-range wireless communication unit 110 may perform short-range wireless communication using the first antenna 111 as well as the second antenna 121 in the underwater state. When the first antenna 111 in the underwater state can be used for near field communication, the communication performance of the near field wireless communication in the underwater state can be further improved.

  As described above, the second antenna 121 in the underwater state is more suitable for position information communication than the third antenna 131 in the underwater state. Therefore, when the underwater state is detected, the second antenna 121 may be connected to the position information communication unit 130.

  FIG. 14 is a diagram illustrating an example of an electrical configuration of the electronic device 1 that can connect the second antenna 121 to the position information communication unit 130. In FIG. 14, illustration of the same part as the electrical configuration shown in FIG. 4 is omitted. In the example of FIG. 14, the switching unit 260 can switch the connection destination of the second antenna 121 to the short-range wireless communication unit 110, the mobile communication unit 120, or the position information communication unit 130.

  FIG. 15 is a flowchart illustrating an example of the operation of the electronic device 1 that performs such a switching operation. In step S31, the switching unit 260 connects the second antenna 121 to the second wireless communication unit 120 (mobile communication unit 120). In the initial state, the second antenna 121 is connected to the mobile communication unit 120. In this case, the mobile communication unit 120 can perform mobile communication using the second antenna 121.

  In step S <b> 32, the control unit 100 determines whether or not it is an underwater state. If it is determined in step S32 that the underwater state is present, that is, if the underwater state is detected by the underwater detection unit 230, step S33 is executed. On the other hand, when it is determined in step S32 that the underwater state is not detected, that is, when the underwater state is not detected by the underwater detection unit 230, step S31 is executed again.

  In step S33, the control unit 100 determines whether or not the wireless communication unit performs wireless communication. If it is determined in step S33 that the wireless communication unit performs wireless communication, step S34 is executed. On the other hand, when it is determined in step S33 that the wireless communication unit does not perform wireless communication, step S32 is executed again.

  In step S34, the control unit 100 performs wireless communication by the first wireless communication unit 110 (short-range wireless communication unit 110), the second wireless communication unit 120 (mobile communication unit 120), and the third wireless communication unit 130. Among the (location information communication unit), it is determined which radio communication unit. If it is determined in step S34 that the second wireless communication unit 120 (mobile communication unit 120) performs wireless communication, step S31 is executed. That is, the second antenna 121 remains connected to the mobile communication unit 120. Therefore, the mobile communication unit 120 can perform mobile communication using the second antenna 121.

  If it is determined in step S34 that the first wireless communication unit 110 (short-range wireless communication unit 110) performs wireless communication, step S35 is executed. In step S35, the switching unit 260 connects the second antenna 121 to the first wireless communication unit 110 (short-range wireless communication unit 110). Therefore, the short-range wireless communication unit 110 can perform short-range wireless communication using the second antenna 121. As described above, in the underwater state, the second antenna 121 is more suitable for short-range wireless communication than the first antenna 111. Therefore, it is possible to improve the communication quality of short-range wireless communication in the underwater state. When step S35 is executed, step S32 is executed again.

  If it is determined in step S34 that the third wireless communication unit 130 (position information communication unit 130) performs wireless communication, step S36 is executed. In step S36, the switching unit 260 connects the second antenna 121 to the third wireless communication unit 130 (position information communication unit 130). Therefore, the location information communication unit 130 can perform location information communication using the second antenna 121. As described above, in the underwater state, the second antenna 121 is more suitable for position information communication than the third antenna 131. Therefore, the communication quality of position information communication in an underwater state can be improved. When S36 is executed, step S32 is executed again.

  In each of the above examples, when the switching unit 260 connects the second antenna 121 to the short-range wireless communication unit 110 or the location information communication unit 130, the second antenna 121 is not connected to the mobile communication unit 120. The antenna 121 may remain connected to the mobile communication unit 120. Thereby, when the 2nd antenna 121 in an underwater state can be used for mobile communication, the mobile communication part 120 can perform mobile communication using the 2nd antenna 121. FIG. When one antenna is connected to a plurality of wireless communication units, a circuit that can separate signal components in wireless communication performed by each of the plurality of wireless communication units, such as a frequency filter circuit, may be provided.

  When wireless communication is performed using a resonance frequency in a higher-order harmonic such as a third harmonic or a fifth harmonic, the signal strength may decrease. In this case, an amplifier circuit for amplifying the signal may be provided. The amplifier circuit may be a circuit that can amplify at different amplification rates in the underwater state and the non-underwater state.

  Note that the resonance frequency of the antenna, the antenna to be switched, and the connection destination of the antenna are not limited to the above example as long as a more suitable antenna can be connected in an underwater state. For example, in each of the above examples, the connection destination of the second antenna 121 is switched, but the connection destination of the first antenna 111 and the third antenna 131 may be switched. For example, when the first antenna 111 in the underwater state is more suitable for mobile communication than the second antenna 121 in the underwater state, when the underwater state is determined, the first antenna 111 is connected to the mobile communication unit. 120 may be connected.

  In each of the above examples, an antenna connected to a radio communication unit that performs radio communication in a predetermined frequency band in a non-underwater state is used as a radio that performs radio communication in a frequency band higher than the predetermined frequency band in the underwater state. Although connected to the communication unit, it may be connected to a wireless communication unit that performs wireless communication in a frequency band lower than the predetermined frequency band in an underwater state.

  For example, when the mobile communication unit 120 performs mobile communication in the 2.1 GHz band, the resonance frequency of the first harmonic wave in the second antenna 121 in the non-underwater state is set to 2.1 GHz, for example. . In this case, the resonance frequency of the first harmonic wave in the second antenna 121 in the underwater state is, for example, 1.47 (= 2.1 × 490/700) GHz. Therefore, the second antenna 121 in the underwater state is suitable for position information communication. In this case, in the underwater state, the connection destination of the second antenna 121 is the position information communication that performs the position information communication in the lower 1.5 GHz band from the mobile communication unit 120 that performs the mobile communication in the 2.1 GHz band. It may be switched to the unit 130.

<Third example of embodiment>
In each of the above examples, the communication quality of the wireless communication unit is improved by notifying warning information when performing wireless communication in the underwater state, or by switching the connection destination of the antenna. When wireless communication is performed, both warning information notification and antenna switching may be performed.

  FIG. 16 is a flowchart showing an example of the operation of the electronic apparatus 1 that performs such an operation. In step S41, the switching unit 260 connects the second antenna 121 to the second wireless communication unit 120 (mobile communication unit 120). In the initial state, the second antenna 121 is connected to the mobile communication unit 120. In this case, the mobile communication unit 120 can perform mobile communication using the second antenna 121.

  In step S42, the control unit 100 determines whether or not the underwater state. If it is determined in step S42 that the underwater state is present, that is, if the underwater state is detected by the underwater detection unit 230, step S43 is executed. On the other hand, when it is determined in step S42 that the underwater state is not detected, that is, when the underwater state is not detected by the underwater detection unit 230, step S41 is executed again. That is, the second antenna 121 is connected to the mobile communication unit 120 until the underwater state is detected by the underwater detection unit 230.

  In step S43, the switching unit 260 connects the second antenna 121 to the first wireless communication unit 110 (short-range wireless communication unit 110). Therefore, the short-range wireless communication unit 110 can perform short-range wireless communication using the second antenna 121.

  In step S44, the control unit 100 determines whether or not the wireless communication unit performs wireless communication. If it is determined in step S44 that the wireless communication unit performs wireless communication, step S45 is executed. On the other hand, when it is determined in step S44 that the wireless communication unit does not perform wireless communication, step S42 is executed again.

  In step S45, the notification unit 140 notifies the user of warning information indicating a warning. For example, the control unit 100 notifies the user of the warning information 300 by controlling the display unit 150 to display the warning information 300 in the display area 2a. The display unit 150 displays a warning screen 400 as shown in FIGS. Thus, both the notification of the warning information and the switching of the antenna connection destination are performed, so that the communication quality of the wireless communication in the underwater state is further improved as compared with the case where either one is performed. be able to.

  Also in this embodiment, as shown in FIG. 7, it is determined whether or not short-range wireless communication is performed, and a warning screen 400 as shown in FIG. 8 or FIG. 9 is displayed based on the determination result. May be.

  Also in this embodiment, as shown in FIG. 15, which of the first wireless communication unit 110, the second wireless communication unit 120, and the third wireless communication unit 130 performs wireless communication. And the connection destination of the second antenna may be switched based on the determination result.

<Various modifications>
An integral device case 3 may be formed by appropriately connecting a plurality of parts directly or indirectly. An electronic apparatus 1B will be described as a specific example having such a configuration.

  FIG. 17 is a rear view schematically showing an example of the appearance of the electronic apparatus 1B. The electronic device 1B is, for example, a mobile phone such as a waterproof smartphone. In the electronic device 1B, for example, one device case 3 is formed by a plurality of modules 3a to 3d attached to the cover panel 2. At this time, as the module 3a, for example, a camera device incorporating the front-side imaging unit 210 may be employed. Further, as the module 3b, for example, a control device that controls the operation of the electronic apparatus 1B such as the control unit 100 may be employed. Further, as the module 3c, for example, a power supply device of the electronic device 1B in which the battery 250 is built can be employed. In addition, as the module 3d, for example, a device in which other configurations are appropriately incorporated may be employed.

  In such a configuration, for example, a processor such as a CPU and a DSP included in the control device of the electronic device 1B as the module 3b executes a program stored in the storage unit 103, thereby controlling the operation of the electronic device 1B. Is done. For example, the module 3b can control wireless communication by the wireless communication unit. Further, the module 3b can execute a process for detecting whether or not it is in an underwater state. Further, the module 3b can control an operation in which the notification unit 140 notifies the user of warning information. Further, the module 3b can control an operation of switching whether or not the switching unit 260 connects the second antenna 121 to the first wireless communication unit 110.

  In each of the above examples, the case where the technology of the present disclosure is applied to a mobile phone such as a smartphone has been described as an example. However, the technology of the present disclosure is also applied to other electronic devices that perform wireless communication in water. be able to. For example, the technology of the present disclosure can be applied to a wearable type electronic device or the like that is worn on a personal computer, a tablet terminal, a user's body, or the like.

  As described above, the technology of the present disclosure has been described in detail, but the above description is illustrative in all aspects, and the present disclosure is not limited thereto. The various modifications described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of this disclosure.

DESCRIPTION OF SYMBOLS 1 Electronic device 3b Module 4 Case 100 Control part 110 1st radio | wireless communication part 120 2nd radio | wireless communication part 130 3rd radio | wireless communication part 140 Notification part 150 Display part 160 Touch sensor 230 Underwater detection part 240 Barometric pressure sensor 260 Switching part fa Non Resonant frequency in the underwater state fa1 Resonant frequency of the first harmonic in the non-underwater state fa3 Resonant frequency of the third harmonic in the non-underwater state fa5 Resonant frequency of the fifth harmonic in the non-underwater state fw Resonant frequency in the underwater state fw1 Resonant frequency of 1st harmonic in the water state fw3 Resonant frequency of 3rd harmonic in the water state fw5 Resonant frequency of 5th harmonic in the water state

Claims (16)

A housing,
A first wireless communication unit for performing first wireless communication;
An underwater detection unit for detecting an underwater state in which the housing is underwater;
An electronic device comprising: a notification unit that notifies a user of warning information indicating a warning when the underwater state is detected by the underwater detection unit when the first wireless communication unit performs the first wireless communication. . The electronic device according to claim 1,
The notification unit includes an display device that displays the warning information when the underwater state is detected by the underwater detection unit when the first wireless communication unit performs the first wireless communication. . The electronic device according to any one of claims 1 and 2,
The communication quality of the first wireless communication in the underwater state is lower than the communication quality in a state where the housing is not in water,
The warning information includes an electronic device including information indicating that the communication quality is deteriorated in the underwater state. An electronic device according to any one of claims 1 to 3,
The warning information includes an electronic device that includes information prompting a user to take the casing out of water. An electronic device according to any one of claims 1 to 4,
The first wireless communication is an electronic device that is short-range wireless communication that the first wireless communication unit directly performs with an external device. The electronic device according to claim 5,
The warning information includes information prompting a user to bring the electronic device close to the external device. An electronic device according to any one of claims 1 to 6,
A first antenna;
A second antenna;
A switching unit that switches whether to connect the second antenna to the first wireless communication unit;
The first wireless communication is wireless communication in a first frequency band,
The resonance frequency of the m-th harmonic (m is an odd number greater than or equal to 1) in the first antenna when the casing is not in water is n-th harmonic (n is Closer to the first frequency band than the resonance frequency of an odd number of 1 or more,
The resonance frequency of the nth harmonic wave in the second antenna in the underwater state is closer to the first frequency band than the resonance frequency of the mth harmonic wave in the first antenna in the underwater state,
When the underwater state is not detected in the underwater detection unit, the switching unit does not connect the second antenna to the first wireless communication unit, and the first wireless communication unit uses the first antenna to Perform the first wireless communication,
When the underwater state is detected by the underwater detection unit, the switching unit connects the second antenna to the first wireless communication unit, and the first wireless communication unit uses the second antenna to An electronic device that performs first wireless communication. The electronic device according to claim 7,
A second wireless communication unit that performs second wireless communication in a second frequency band different from the first frequency band;
The resonance frequency of the nth harmonic wave in the second antenna in the non-underwater state is closer to the second frequency band than the resonance frequency of the mth harmonic wave in the first antenna in the non-water state,
The switching unit switches whether to connect the second antenna to the first wireless communication unit or to connect to the second wireless communication unit,
When the underwater state is not detected by the underwater detection unit, the switching unit connects the second antenna to the second wireless communication unit, and the second wireless communication unit uses the second antenna to 2 Electronic equipment that performs wireless communication. The electronic device according to claim 8,
The electronic device, wherein the first frequency band is higher than the second frequency band. The electronic device according to claim 8,
The electronic device, wherein the first frequency band is lower than the second frequency band. The electronic device according to any one of claims 7 to 10,
The first antenna is connected to the first wireless communication unit regardless of the detection result in the underwater detection unit,
When the underwater state is detected by the underwater detection unit, the first wireless communication unit performs the first wireless communication using the first and second antennas. An electronic device according to any one of claims 1 to 11,
A pressure sensor for detecting pressure;
The underwater detection unit is an electronic device that detects the underwater state based on a detection result of the pressure sensor. An electronic device according to any one of claims 1 to 12,
It further includes a capacitance sensor that detects capacitance,
The underwater detection unit is an electronic device that detects the underwater state based on a detection result of the capacitance sensor. An electronic device control method comprising:
A first step of performing wireless communication;
A second step of detecting an underwater state in which the electronic device is in water;
An electronic device control method comprising: a third step of notifying a user of warning information indicating a warning when the underwater state is detected in the second step when the wireless communication is performed. A control program for controlling an electronic device,
A first step of performing wireless communication with the electronic device;
A second step of detecting an underwater state in which the electronic device is in water;
A control program for executing a third step of notifying a user of warning information indicating a warning when the underwater state is detected in the second step when the wireless communication is performed. A control device for controlling an electronic device,
A storage unit for storing the program;
By executing the program,
A first process for controlling the wireless communication;
A second process for detecting an underwater state in which the electronic device is underwater;
A control device comprising: a processor that executes a third process of notifying a user of warning information indicating a warning when the underwater state is detected in the second process when the wireless communication is performed.

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