JP2018207422A - Imaging apparatus - Google Patents

Abstract

To provide an imaging apparatus which prevents the execution of an unnecessary connection despite that communication is not possible between a digital camera and a smart phone.SOLUTION: A digital camera having short-range communication means includes: means for enabling connection, transmission and reception between with external equipment; pairing means for exchanging information with the external equipment to perform the short-range communication; means for receiving a key to perform encryption communication after connecting with the external equipment; and means for storing, at the cancellation of the pairing, the key information and the application ID of a connection destination external equipment. At reconnection with the external equipment, on determining that the external equipment was connected in the past, the digital camera urges to cancel the pairing information on the external equipment side.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a technique for performing wireless communication.

  In recent years, with the advent of smartphones, opportunities to utilize captured images and videos for smartphones and images and videos to SNS and cloud are increasing. As the opportunities increase, users can shoot with digital cameras as well as images and videos taken with cameras built into smartphones to meet the desire to record more beautiful images and videos. It is expected that the images and videos will be used on smartphones.

  Under such circumstances, digital cameras equipped with Bluetooth (registered trademark) / Wi-Fi (registered trademark) function have appeared. This digital camera has a use case of being always connected directly to a smartphone via Bluetooth, and Bluetooth communication is characterized by low power consumption, and can be controlled from a smartphone application as needed while always connected. Thus, it is possible to perform high-speed image transfer by switching to Wi-Fi connection. In addition, encrypted data communication is possible by performing pairing between the digital camera and the smartphone.

  The encryption key is exchanged between the paired digital camera and the smartphone, but the encryption key is deleted when pairing is canceled on the smartphone side or when pairing is started and canceled on the digital camera side. When one device cancels the pairing between the digital camera and the smartphone, if the encrypted communication is performed after performing the connection process, the communication fails due to the mismatch of the encryption keys.

  There are a number of issues that require us to confirm the availability of encrypted communications. In Patent Document 1, communication can be performed correctly if the encryption method matches between communicating devices, but communication cannot be performed if the encryption methods do not match. In preparation for such a situation, it is said that Wi-Fi communication is performed after obtaining an encryption method of a communication method originally desired to be communicated such as Wi-Fi by another communication method such as NFC and confirming that it matches. There are also things.

Japanese Patent No. 04702944

  The problem to be solved by the present invention is that pairing is performed for encrypted data communication, and an encryption key is exchanged between the digital camera and the smartphone. If you delete, you will notice that pairing between devices has been canceled only after communication is started after connecting the digital camera and smartphone.

  Therefore, there is a problem that even though communication between the digital camera and the smartphone cannot be performed, an unnecessary connection is executed, and it is difficult for the user to notice that the pairing is canceled by one of the connection devices.

In order to solve the above problems, a digital camera according to the present invention provides:
A digital camera having a short-range communication means,
A means for connecting / transmitting / receiving with external devices;
A pairing means for exchanging information for short-range communication with an external device;
Means for receiving a key for performing encrypted communication after connecting to an external device;
Means for storing the key information and the application ID of the connected external device at the time of pairing cancellation;
When it is determined that the external device has been connected in the past at the time of reconnection with the external device, it is urged to cancel the pairing information on the external device side.

  According to the digital camera according to the present invention, in the case of a smartphone and a digital camera that have been paired in Bluetooth connection, even if one of the pairing is canceled, communication between the digital camera and the smartphone is not possible. This makes it possible for the user to notice that pairing has been canceled on one connected device without performing unnecessary connections.

It is a hardware block diagram which shows the structure of the digital camera 100 in 1st and 2nd embodiment. It is a hardware block diagram which shows the structure of the smart phone 200 in 1st and 2nd embodiment. It is a system block diagram which shows the structure which establishes the pairing of the digital camera 100 and the smart phone 200 in 1st and 2nd embodiment. It is a system configuration | structure figure which shows the structure in which the digital camera 100 in which the pairing in 1st and 2nd has been established, and the smart phone 200 establish the reconnection by Bluetooth communication. It is a system configuration figure showing the composition of the problem which occurs when establishing the pairing of digital camera 100 which deleted registration information on pairing in a 1st embodiment, and smart phone 200. It is a system configuration figure showing the composition which solves the problem which occurs when the digital camera 100 which deleted registration information on pairing in a 1st embodiment and the pairing of smart phone 200 are established. It is the flowchart which showed the process which establishes a pairing connection and reconnection with the smart phone 200 of the digital camera 100 in 1st and 2nd embodiment. It is the flowchart which showed the process which establishes the pairing connection and reconnection with the digital camera 100 of the smart phone 200 of 1st Embodiment. It is a flowchart of a 2nd embodiment. It is an example of a screen of a digital camera when prompting to delete registration information of pairing of a smartphone in the first embodiment. It is an example of a user interface screen for selecting whether to reconnect to a smartphone that has been connected in the past in the second embodiment.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail using attached drawing.

  The embodiment described below is an example as means for realizing the present invention, and may be appropriately modified or changed depending on the configuration of the apparatus to which the present invention is applied and various conditions. Moreover, it is also possible to combine each embodiment suitably.

[First Embodiment]
<Configuration of digital camera>
FIG. 1A is a hardware configuration diagram illustrating a configuration example of a digital camera 100 that is an example of a communication apparatus according to the present embodiment.

  The control unit 101 controls each unit of the digital camera 100 according to an input signal and a program described later. Note that instead of the control unit 101 controlling the entire apparatus, a plurality of hardware may share the processing to control the entire apparatus.

  The imaging unit 102 includes, for example, an optical lens unit, an optical system that controls the aperture, zoom, focus, and the like, and an imaging device that converts light (video) introduced through the optical lens unit into an electrical video signal. Composed. In general, a CMOS (Complementary Metal Oxide Semiconductor) or a CCD (Charge Coupled Device) is used as the imaging element. The imaging unit 102 is controlled by the control unit 101 to convert subject light imaged by a lens included in the imaging unit 102 into an electrical signal by the imaging device, and perform noise reduction processing or the like to convert the digital data into an image. Output as data. In the digital camera 100 of the present embodiment, the image data is recorded on the recording medium 110 in accordance with the DCF (Design Rule for Camera File System) standard.

  The non-volatile memory 103 is an electrically erasable / recordable non-volatile memory, and stores a program to be described later executed by the control unit 101.

  The work memory 104 is used as a buffer memory that temporarily holds image data picked up by the image pickup unit 102, an image display memory of the display unit 106, a work area of the control unit 101, and the like.

  The operation unit 105 is used for the user to accept an instruction for the digital camera 100 from the user. The operation unit 105 includes, for example, a power button for instructing the user to turn on / off the digital camera 100, a release switch for instructing photographing, and a reproduction button for instructing reproduction of image data. Furthermore, an operation member such as a dedicated connection button for starting communication with an external device via the communication unit 111 described later is included. A touch panel formed on the display unit 106 described later is also included in the operation unit 105. The release switch has SW1 and SW2. When the release switch is in a so-called half-pressed state, SW1 is turned on. As a result, an instruction for making preparations for shooting such as AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, and EF (flash pre-emission) processing is accepted. Further, when the release switch is in a fully-pressed state, SW2 is turned on. As a result, an instruction for photographing is received.

  The display unit 106 displays a viewfinder image at the time of shooting, displays shot image data, and displays characters for interactive operation. Note that the display unit 106 is not necessarily built in the digital camera 100. The digital camera 100 can be connected to an internal or external display unit 106 and only needs to have at least a display control function for controlling display on the display unit 106.

  The RTC 107 performs clock management. The time may be set by the user via the operation unit 105, or the time information may be acquired and set via the communication unit 111, or the time may be set by a radio clock. It is sufficient if the time can be managed.

  The recording medium 110 can record the image data output from the imaging unit 102. The recording medium 110 may be configured to be detachable from the digital camera 100 or may be built in the digital camera 100. That is, the digital camera 100 only needs to have a means for accessing at least the recording medium 110.

  The communication unit 111 is an interface for connecting to an external device. The digital camera 100 of this embodiment can exchange data with an external device via the communication unit 111. For example, image data generated by the imaging unit 102 can be transmitted to an external device via the communication unit 111. In the present embodiment, the communication unit 111 includes an interface for communicating with an external apparatus via a so-called wireless LAN in accordance with the IEEE 802.11 standard. The control unit 101 realizes wireless communication with an external device by controlling the communication unit 111. Note that the communication method is not limited to the wireless LAN, and includes, for example, an infrared communication method. The communication unit 111 is an example of a first wireless communication unit.

  The short-range communication unit 112 is an interface for connecting to an external device. The digital camera 100 of this embodiment can exchange data with an external device via the communication unit 112. For example, image data generated by the imaging unit 102 can be transmitted to an external device via the communication unit 112. Note that in the present embodiment, the communication unit 112 includes an interface for communicating with an external device in accordance with the IEEE 802.15.1 standard, so-called Bluetooth (registered trademark). The control unit 101 realizes wireless communication with an external device by controlling the communication unit 112. Note that the communication method is not limited to Bluetooth, and includes, for example, a wireless LAN known from the IEEE 802.11 standard or an infrared communication method. The communication unit 112 is an example of a first wireless communication unit.

  Note that the short-range communication unit 112 of the digital camera 100 in this embodiment has either a peripheral mode or a central mode. Then, by operating the communication unit 112 in the peripheral mode, the digital camera 100 in the present embodiment can operate as a client device in Bluetooth. When the digital camera 100 operates as a client device, communication is possible by connecting to an external device that is in a central mode. As for authentication with the connected external device, pairing is performed in advance, so that the unique information of the connected external device is held in the nonvolatile memory 103.

  The close proximity wireless communication unit 114 includes, for example, an antenna for wireless communication and a modulation / demodulation circuit and a communication controller for processing a wireless signal. The proximity wireless communication unit 114 outputs a modulated wireless signal from an antenna, and demodulates the wireless signal received by the antenna, thereby non-contact proximity communication according to the ISO / IEC 18092 standard (so-called NFC: Near Field Communication). To realize. The close proximity wireless transfer unit 114 of this embodiment is disposed on the side of the digital camera 100.

  The smartphone 200 described later is connected by starting communication by bringing the proximity wireless communication unit 114 and the proximity wireless communication unit 214 close to each other. Note that when the proximity wireless communication unit 114 is used to connect to the smartphone 200, the proximity wireless communication unit 114 and the proximity wireless communication unit 214 are not necessarily in contact with each other. The close proximity wireless communication unit 114 and the close proximity wireless communication unit 214 can communicate with each other even if they are separated by a certain distance. Good. In the following description, it is also referred to as bringing close to the range where close proximity wireless communication is possible.

  Next, the appearance of the digital camera 100 will be described.

  1B and 1C are diagrams illustrating an example of the appearance of the digital camera 100. FIG.

  The release switch 105a, the playback button 105b, the direction key 105c, and the touch panel 105d are operation members included in the operation unit 105 described above. Further, the display unit 106 displays an image obtained as a result of imaging by the imaging unit 102.

  The above is the description of the digital camera 100.

<Internal configuration of smartphone 200>
FIG. 2 is a hardware configuration diagram illustrating a configuration example of the smartphone 200 which is an example of the information processing apparatus according to the present embodiment. In addition, although a smart phone is described here as an example of an information processing apparatus, an information processing apparatus is not restricted to this. For example, the information processing apparatus may be a digital camera with a wireless function, a tablet device, or a personal computer.

  The control unit 201 controls each unit of the smartphone 200 according to an input signal and a program described later. Note that instead of the control unit 201 controlling the entire apparatus, the entire apparatus may be controlled by a plurality of pieces of hardware sharing the processing.

  The nonvolatile memory 203 is an electrically erasable / recordable nonvolatile memory. The nonvolatile memory 203 stores an OS (operating system) that is basic software executed by the control unit 201 and an application that realizes an applied function in cooperation with the OS. In the present embodiment, the nonvolatile memory 203 stores an application (hereinafter referred to as an application) for communicating with the digital camera 100.

  The work memory 204 is used as an image display memory of the display unit 206, a work area of the control unit 201, and the like.

  The operation unit 205 is used to receive an instruction for the smartphone 200 from the user. The operation unit 205 includes an operation member such as a power button for the user to instruct power on / off of the smartphone 200, an operation member for setting the RTC 207, and a touch panel formed on the display unit 206, for example.

  The display unit 206 displays image data, characters for interactive operation, and the like. Note that the display unit 206 is not necessarily provided in the smartphone 200. The smartphone 200 can be connected to the display unit 206 and only needs to have at least a display control function for controlling the display of the display unit 206.

The RTC 207 performs clock management. The time may be set by the user via the operation unit 205, or time information may be acquired and set via the communication unit 211, the short-range communication unit 212, or the public network connection unit 213, or captured by a radio clock. You can also set the clock. It is sufficient if the time can be managed. Alternatively, the time may be obtained by a detection mechanism from a mechanical mechanism such as an analog timepiece. (In this case, the RTC 207 includes a detection mechanism from an analog clock)
The recording medium 210 can record the image data transferred to the control unit 201 by the digital camera 100 via the communication unit 211. The recording medium 210 may be configured to be detachable from the smartphone 200 or may be built in the smartphone 200. That is, the smartphone 200 only needs to have at least a means for accessing the recording medium 210.

  The communication unit 211 is an interface for connecting to an external device. The smartphone 200 of the present embodiment can exchange data with an external device via the communication unit 211. In the present embodiment, the communication unit 211 is an antenna, and the control unit 201 can be connected to the digital camera 100 via the antenna. In the present embodiment, the communication unit 211 includes an interface for communicating with an external device via a so-called wireless LAN in accordance with the IEEE 802.11 standard. The control unit 201 realizes wireless communication with an external device by controlling the communication unit 211. Note that the communication method is not limited to the wireless LAN, and includes, for example, an infrared communication method. The communication unit 211 is an example of a first wireless communication unit.

  The communication unit 212 is an interface for connecting to an external device. The smartphone 200 of this embodiment can exchange data with an external device via the communication unit 212. For example, image data generated by the digital camera 100 can be received via the communication unit 212. Note that in the present embodiment, the communication unit 212 includes an interface for communicating with an external device in accordance with the IEEE 802.15.1 standard, so-called Bluetooth (registered trademark). The control unit 201 realizes wireless communication with an external device by controlling the communication unit 212. Note that the communication method is not limited to Bluetooth, and includes, for example, a wireless LAN known from the IEEE 802.11 standard or an infrared communication method. The communication unit 212 is an example of a first wireless communication unit.

  Note that the communication unit 212 of the smartphone 200 in the present embodiment has either a peripheral mode or a central mode. And the smart phone 200 in this embodiment can operate | move as a server apparatus in Bluetooth by operating the communication part 212 in central mode. When the smartphone 200 operates as a server device, communication is possible by connecting to an external device that is in the peripheral mode. For authentication with an external device to be connected, pairing is performed in advance, so that the unique information of the external device to be connected is held in the nonvolatile memory 203.

  The proximity wireless communication unit 214 includes, for example, an antenna for wireless communication and a modulation / demodulation circuit and a communication controller for processing a wireless signal. The proximity wireless communication unit 214 outputs a modulated wireless signal from an antenna, and demodulates the wireless signal received by the antenna, thereby non-contact proximity communication in accordance with ISO / IEC 18092 standard (so-called NFC: Near Field Communication). To realize. The close proximity wireless transfer unit 214 of this embodiment is disposed on the side of the digital camera 100.

<System configuration diagram>
Next, a system configuration diagram in the first embodiment will be described.

  FIG. 3 is a system configuration diagram until communication pairing is established with Bluetooth between the digital camera 100 and the smartphone 200.

  Hereinafter, a flow from when the user 301 starts Bluetooth pairing with the digital camera 100 to when pairing with the smartphone 200 is established is shown.

  In FIG. 3A, the user 301 operates the digital camera 100 to execute pairing start of the Bluetooth setting function. When Bluetooth pairing is started in the digital camera 100, an advertisement signal 302 is transmitted to the surroundings. FIG. 3B shows a state in which the digital camera 100 and the smartphone 200 are connected via Bluetooth and the keys for encrypted communication are exchanged.

  The smartphone 200 receives the advertisement signal transmitted from the digital camera 100 by the short-range communication unit 212, determines the pairing request of the digital camera 100 from the advertisement signal data, and displays the digital camera detection display on the display unit 206 of the smartphone 200. To do. The smartphone 200 receives an operation for starting pairing with the digital camera 100 found by the user 301, makes a Bluetooth connection request to the digital camera 100, and the digital camera 100 and the smartphone 200 establish a Bluetooth connection. A pairing request is notified from the smartphone 200 to the digital camera 100, and a key for encrypting communication data is exchanged so that encrypted communication between the smartphone 200 and the digital camera 100 is possible.

  In the digital camera 100, the key for canceling the exchanged communication data encryption is stored in the communication control module 312 of the software module configuration 316 that operates in the control unit 101 of the digital camera 100. The information is stored in the OS 311 of the software module configuration 315 that operates in the control unit 201. When the key is stored in the OS 311, the OS becomes ready for encrypted communication with the digital camera 100.

  FIG. 3C is a diagram in which the application ID 321 of the smartphone 200 is passed to the camera through encrypted communication after the digital camera 100 and the smartphone 200 are in a state where encrypted communication is possible after Bluetooth connection.

  When the application ID 321 is passed to the digital camera 100, the digital camera 100 stores it in the camera control module 322, determines that pairing with the smartphone 200 has been established, and enters a paired state.

<System configuration diagram 2>
Next, a process in the case of reconnecting with the digital camera 100 and the smartphone 200 paired with Bluetooth will be described.

  FIG. 4A is a diagram when reconnection is started.

  When the user 301 turns on the power switch of the digital camera 100 or inserts a battery into the digital camera 100 so that the Bluetooth function of the digital camera 100 can be used, the digital camera 100 is connected to Bluetooth. An advertisement signal 302 is transmitted to the surroundings.

  FIG. 4B shows a state in which an application ID 321 acquired from the smartphone 200 is placed on the advertisement signal transmitted from the digital camera 100 and transmitted when the pairing is established.

  The smartphone 200 receives the advertisement signal transmitted from the digital camera 100 by the short-range communication unit 212, determines its own application ID from the advertisement signal data, and determines that it can be connected to itself.

  When the smartphone 200 determines that it is its own application ID 321, in FIG. 4C, it makes a Bluetooth connection request to the digital camera 100, and the digital camera 100 and the smartphone 200 establish a Bluetooth connection again.

<System configuration diagram 3>
Here, the digital camera 100 can delete the registration information of the paired smartphone 200 by a user operation.

  FIG. 5 is a system configuration diagram showing a problem that occurs when re-registering pairing again when the registration information of the smartphone 200 that has been paired with the digital camera 100 is deleted.

  FIG. 5A is a diagram when the registration information of the paired smartphone 200 is deleted by the user 301 operating the digital camera 100.

When the paired registration information is deleted, the encryption key 314 stored in the communication control module 312 of the digital camera 100 and the application ID 321 of the smartphone 200 stored in the camera control module 322 are deleted. At this time, the encryption key 313 stored in the OS 311 of the smartphone 200 remains without being deleted.
The digital camera 100 can newly re-pair with the smartphone after deleting the paired registration information. Pairing registration with a smartphone different from the one registered previously is possible, and pairing registration with the smartphone that was originally registered needs to be possible.

  FIG. 5B shows the processing when re-registering the pairing with the smartphone that was originally registered.

  Similarly to FIG. 3A, the user 301 operates the digital camera 100 to execute pairing start of the Bluetooth setting function. When Bluetooth pairing is started in the digital camera 100, an advertisement signal 302 is transmitted to the surroundings. At this time, unlike the advertisement signal 401 shown in FIG. 4B, the application ID of the paired smartphone is not included.

  FIG. 5C is a diagram in which the digital camera 100 and the smartphone 200 try to start a new Bluetooth connection, but there is a problem that encrypted communication cannot be established correctly.

  The smartphone 100 that has detected the advertisement signal 302 transmitted from the digital camera 100 establishes a connection for Bluetooth communication. After the communication is established, the digital camera 100 generates a new encryption key 501 and attempts encrypted communication. However, the smartphone 200 performs encrypted communication processing using the old encryption key 313 stored in the OS 311. . For this reason, even if the application 322 of the smartphone 200 determines that the application ID is not included in the advertisement signal 302 and tries to transmit its own application ID 321 to the digital camera 100 by encrypted communication, the encryption key 313 is old. Therefore, data transmission fails.

<System configuration diagram 4>
FIG. 6 is a system configuration diagram showing processing for solving the problem shown in FIG.

  FIG. 6A shows a state when the user 301 operates the digital camera 100 and starts pairing of the Bluetooth setting function, as in FIG. 5B.

  As described above, the advertisement signal 302 at this time does not include the application ID 321 of the paired smartphone.

When the pairing is canceled, the smartphone application ID 321 stored in the camera control unit and the encryption key 314 stored in the communication control unit are transferred to the storage unit 317.
Alternatively, the application ID 321 and the encryption key 314 may be stored when the first pairing is established.

  On the other hand, the OS 311 of the smartphone 200 stores an encryption key 313 dedicated to the digital camera 100. When the smartphone 100 that has detected the advertisement signal 302 from the digital camera 100 makes a pairing request to the digital camera 100 again, the digital camera 100 refers to the application ID 321 of the smartphone stored in the storage unit 317 and has previously connected. When it is determined that the pairing information on the smartphone side is canceled, the display unit of the digital camera 100 is prompted to release the pairing information.

  As shown in FIG. 6B, by releasing pairing with the smartphone 200 and generating an encryption key, the digital camera 100 and the smartphone 200 are connected via Bluetooth as shown in the flow of the pairing process shown in FIG. , The key for encrypted communication is newly exchanged and stored, the smartphone 200 transmits the application ID 321 to the digital camera 100 by encrypted communication, and the digital camera 100 stores the application ID 321 by the camera control module, Pairing process can be completed correctly.

<Flowchart of connection process of digital camera 100>
Next, a flowchart of the connection process of the digital camera 100 according to the first embodiment will be described with reference to FIG.

  FIG. 7A shows a processing flow of the digital camera 100 when the user 301 operates the digital camera 100 to start Bluetooth pairing.

  In step S1001, the digital camera 100 transmits an advertisement signal to the surroundings. This advertisement signal includes a device name, a device-specific ID, and a service ID. The smartphone 200 can determine whether it is a compatible device from the advertisement signal.

  In step S1002, the process waits until a connection request transmitted by the smartphone 200 that has found the advertisement signal is received. When received, a connection for Bluetooth communication is established in step S1003.

Subsequently, in step S1004, communication for generating and exchanging encryption keys 313 and 314 for realizing encrypted communication is performed between the digital camera 100 and the smartphone 200, and the encryption keys 313 and 314 are stored with each other. It will be used for future encrypted communication.
In step S1005, the process waits until an application ID 321 transmitted from the smartphone 200 by encrypted communication is received. If received, the digital camera 100 stores the application ID 321 in the camera control module 322 in step S1006.

  With the above processing, pairing registration of the smartphone 200 with the digital camera 100 is completed.

  On the other hand, FIG. 7B is a processing flow of the digital camera 100 when the user 301 operates the digital camera 100 to start connection to the paired smartphone 200.

  In step S1101, the application ID 321 stored in the camera control module 322 by the digital camera 100 in the above-described pairing process is read into the work memory 104.

  In step S1102, information obtained by adding the application ID 321 to the advertisement signal described in step S1001 is transmitted to the surroundings. If the smartphone 200 determines that the application ID 321 included in the advertisement signal is its own ID, the smartphone 200 transmits a connection request.

  In step S1103, the process waits until a connection request transmitted by the smartphone 200 that has found the advertisement signal is received. If received, a Bluetooth communication connection is established in step S1104.

  With the above processing, the connection processing of the smartphone 200 paired with the digital camera 100 is completed.

  Next, the flowchart of the connection process of the smart phone in 1st Embodiment is demonstrated to FIG.

  When pairing is canceled by the digital camera 100 in step S2001, the application ID of the smartphone that is in the connected state and the encryption key used for encrypted communication are stored in the storage unit 317 in step 2002. After that, when pairing is started again with respect to the smartphone 200 on the digital camera side 100 in step S2003, the digital camera 100 starts transmitting an advertisement signal to the smartphone 200 in step S2003. When the smartphone 200 receives an advertisement signal from the digital camera 100, the smartphone 200 issues a connection request to the digital camera 100.

  When a connection request from the smartphone 200 is received in step S2005, it is confirmed whether the application ID of the smartphone stored in the storage unit 317 in step S2006 matches the application ID of the smartphone that has made the connection request this time. . If the application ID matches the stored application ID, a warning is displayed on the display unit of the digital camera 100 so as to cancel the pairing information of the smartphone 200 that has requested connection in step S2007.

  If the application ID of the smartphone that requested the connection in step S2006 does not match the smartphone ID stored in the storage unit 317, the opposite smartphone is a new connection partner, and thus a normal connection process is performed in step S2008.

<Warning message screen of digital camera 100>
FIG. 10 shows a warning user interface that displays the warning in step S2007 of FIG. 8 that operates on the digital camera 100 described above and prompts the user to cancel the pairing of the smartphone.

  By carrying out the first embodiment, pairing is released, and when reconnection is attempted, it becomes possible to notify the user that pairing release is necessary on the smartphone side.

[Second Embodiment]
In the first embodiment, the embodiment has been described with respect to a technique for warning the user that the digital camera 100 is released from the pairing with the smartphone 200. In the second embodiment, the pairing is performed. An example of reconnecting a smartphone 200 that has been previously connected without releasing the pairing of the smartphone 200 once will be described with reference to FIG. 9.

  In step 3001, it is determined whether the digital camera 100 has canceled pairing. When pairing is canceled, the application ID of the smartphone that was connected to the storage unit 317 in step 3002, and the encryption used for encrypted communication. Remember the key.

  After that, when pairing is started again for the smartphone 200 on the digital camera side 100 in step S3003, the digital camera 100 starts transmitting an advertisement signal to the smartphone 200 in step S3003. When the smartphone 200 receives an advertisement signal from the digital camera 100, the smartphone 200 issues a connection request to the digital camera 100.

  When the connection request from the smartphone 200 is received in step S3005, it is confirmed whether the application ID of the smartphone stored in the storage unit 317 in step S3006 matches the application ID of the smartphone that has made the connection request this time. . When it can be determined that the application ID of the smartphone has been connected in the past, a selection screen as to whether or not to permit connection is displayed in step S3007. If the permission is determined in step S3008, the application ID and encryption key stored in the storage unit 317 in step S3009 are restored to the communication control unit and the camera control unit. In step S3010, a connection is established with the smartphone that requested the connection. If permission is not pressed in step S3008, a warning is displayed in step S3011 to cancel the pairing information of the smartphone.

  If it is not determined in step S3006 that the smartphone 200 that has requested connection has been connected in the past, the connection ID is established in step S3012 because the application ID and encryption key of the new smartphone are communicated.

  FIG. 11 shows a user interface that allows the user to select whether or not to allow the connection as it is because the smartphone has been connected in the past in step S3007.

  By implementing the second embodiment, it is possible to easily connect a digital camera to a smartphone without having to cancel pairing again and start pairing again for a smartphone that has been connected in the past. It becomes.

100 digital camera, 101 control unit, 102 imaging unit

Claims (2)

A digital camera having a short-range communication means,
A means for connecting / transmitting / receiving with external devices;
A pairing means for exchanging information for short-range communication with an external device;
Means for receiving a key for performing encrypted communication after connecting to an external device;
Means for storing the key information and the application ID of the connected external device at the time of pairing cancellation;
A digital camera characterized by prompting the user to cancel pairing information on the external device side when it is determined that the external device has been connected in the past when reconnecting to the external device. When the encryption key is deleted by pairing cancellation of the digital camera, the digital camera stores the application ID and encryption key of the external device connected to the storage means (103), and there is a connection request. The digital camera according to claim 1, wherein when the external device can be recognized as an external device that has been connected before, a display for allowing the digital camera to select whether to permit connection again is performed.