JP5494052B2 - Electronic device and control method thereof - Google Patents

Description

  The present invention relates to an electronic device capable of close proximity wireless communication and a control method thereof.

  In recent years, near field communication (NFC) has become widespread, and mobile phones used as employee ID cards, student ID cards, commuter passes, or wallet phones using IC cards that use NFC. In many cases, NFC is introduced to identify individuals.

  Specifically, using such an IC card for identifying an individual, a user restriction function, pairing and association in a network function, and the like have been realized on a PC. On the other hand, not only for PCs, but also for use of office equipment such as multifunction machines equipped with multiple copying and facsimile functions, network pairing and association can be performed using NFC in consideration of security. Proposed.

  There are various types of NFC tokens such as IC cards, but most of them record information necessary for using the device in the storage area in the NFC token, and read the information to perform association or Perform pairing and further authentication. In this information storage area, there may be a function for mutual authentication between the NFC token and the device at the time of data access. The information in the NFC token holds setting information necessary for network connection, information necessary for authenticating an individual, and the like, and this information can be acquired by the device.

  In recent years, a token in which certificate information is held in the NFC token has also been created, and a use case of using this certificate information is considered as a trigger of a security function for a function to be used. For example, by providing certificate information in an NFC token, it has been proposed to authenticate whether the data is safe and legitimate by using security for a communication path such as a network function or a signature for electronic data.

  Also, in the printing device, the certificate installed in the RAM or the like in the printing device is monitored, and when the expiration date expires, the certificate is automatically updated if the acquisition destination is set, and is not set In this case, a technique for notifying an administrator using a UI or the like is considered and proposed. For example, Patent Literature 1 discloses a printing unit that performs printing processing for the purpose of notifying a printing device user or administrator of expiration of a certificate when a certificate owned by the printing device has expired. A display unit (UI), a storage unit for storing a certificate, a network interface unit, an operation unit capable of setting a printing device, a clock device, and a function for checking a certificate expiration date An arrangement comprising the above is disclosed.

  However, the conventional system as described above has means for monitoring a certificate installed in a printing device, but an individual certificate is provided outside the printing device with an NFC token or the like. In this case, there is no means to monitor the expiration date of each individual certificate and notify the user when the expiration date is about to expire or to automatically update the certificate, so the user has an expired certificate. There was a problem that would end up.

  The present invention has been made in view of the above, and when an individual certificate is held outside an electronic device such as a printing device, the user has a certificate that has expired. The purpose is to solve the problem of end.

In order to solve the above-described problems and achieve the object, the electronic device according to the present invention includes a communication connection means for connecting to a wired or wireless communication line, and an individual device held in a memory area of the NFC-equipped device. A reading unit that reads certificate information, a storage unit that stores the certificate information read by the reading unit, a notification unit that notifies the user according to an expiration date of the certificate information read by the reading unit, A first acquisition unit that acquires new certificate information from a certificate authority via the wired or wireless communication line via the communication connection unit, and the new certificate information acquired by the first acquisition unit to the NFC-equipped device. before writing, when the NFC communication is disconnected, and a first setting means for setting whether to store the new certificate information the acquired predetermined period said storage means Obtaining it is desirable.

The electronic device control method of the present invention includes a communication connection step for connecting to a wired or wireless communication line, a reading step of reading individual certificate information held in the memory area of the NFC-equipped device, A storage step for storing certificate information read by the reading step, a notification step for notifying a user in accordance with an expiration date of the certificate information read by the reading step, and a new certificate via the communication connection step A first acquisition step of acquiring information from a certificate authority through the wired or wireless communication line, and NFC communication is disconnected before writing the new certificate information acquired in the first acquisition step to the NFC-equipped device. A first setting step for setting whether or not the acquired new certificate information is stored in the storage step for a certain period of time .

  According to the present invention, an NFC-equipped device is provided as a use case for providing an individual certificate outside an electronic device such as a printing device, and the validity period of the individual certificate is monitored and validated on the electronic device side. By providing means for notifying or updating the user when the deadline is about to expire, the problem that the user will have a certificate that has expired can be solved.

FIG. 1 is a configuration diagram of a network system including an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a hardware configuration of the image forming apparatus 10 according to the embodiment of the present disclosure. FIG. 3 is a diagram illustrating an example of a functional configuration of the image forming apparatus 10 according to the embodiment of the present disclosure. FIG. 4 is a diagram illustrating an example of a software module configuration focusing on the authentication control service 220g in FIG. FIG. 5 is a flowchart illustrating an example of a basic certificate information update process for an NFC-equipped device according to the present embodiment. FIG. 6 is a diagram illustrating an example of a screen when notification is performed by display on the operation unit. FIG. 7 is a flowchart showing an example of a certificate information update process including a special case for an NFC-equipped device in the present embodiment. FIG. 8 is a diagram illustrating an example of the automatic update setting screen.

  Exemplary embodiments of an image forming apparatus as an electronic apparatus and related apparatuses according to the present invention will be described below in detail with reference to the accompanying drawings. The image forming apparatus described below is an example of an electronic apparatus according to the present invention. The present invention is not limited to the image forming apparatus, and can be applied to any electronic apparatus that uses certificate information. .

(System configuration)
FIG. 1 is a configuration diagram of a network system including an image forming apparatus according to an embodiment of the present invention. Connected to the image forming apparatus 10 is an NFC reader / writer 11 that can communicate with an NFC token 20a and an NFC-equipped mobile terminal (for example, an NFC-equipped mobile phone) 20b. The image forming apparatus 10 uses the NFC reader / writer 11 to obtain association information necessary for network settings held in the memory area of the NFC token 20a or the NFC-equipped mobile terminal 20b, or obtain individual certificate information. And can be updated. The image forming apparatus 10 is connected to a wired or wireless network (LAN / WLAN), and communicates with the certificate authority (CA) server 30, the access point 40, and the electronic mail server 50 via this network. Is possible.

  In the present embodiment, the user holds association information necessary for network setting, held for each NFC token 20a or NFC-equipped mobile terminal 20b (hereinafter referred to as NFC-equipped device), and certification for each individual or NFC-equipped device. Assume that you have an NFC-equipped device for which certificate information is registered. When the operation of the image forming apparatus 10 starts, the user holds the NFC-equipped device over the NFC reader / writer 11 to perform network association or pairing and authentication processing.

  When a series of processing is successful, it becomes possible to start communication with the image forming apparatus 10 and start an installed application permitted after authentication. Thereafter, for security purposes, encrypted communication, electronic data signature, etc. can be performed using the certificate information in the NFC-equipped device. A plurality of certificate information can be registered as long as the capacity of the NFC-equipped device permits.

  In addition, the user can freely select a certificate information expiration notification method from several patterns. The means for the notification is by displaying on the operation panel (UI), notification by sound or light, printing on paper using a printing function, and sending an e-mail to a designated mail server. Can be implemented. Or these may be combined.

  The image forming apparatus 10 according to the present embodiment includes a multi-function machine having at least two functions among a copy function, a printer function, a scanner function, and a facsimile function. The image forming apparatus may be used. In FIG. 1, the NFC reader / writer 11 is drawn outside the image forming apparatus 10, but it is optional whether it is external or internal.

(Hardware configuration)
FIG. 2 is a diagram illustrating an example of a hardware configuration of the image forming apparatus 10 according to the embodiment of the present disclosure. 2, the image forming apparatus 10 includes a controller unit 110, an operation unit 130, a fax control unit 140, a plotter 150, a scanner 160, and other hardware resources 170 that are other hardware resources.

  The controller 110 includes a CPU 111, a timer 112, a ROM 113, a RAM 114, an ASIC (Application Specific Integrated Circuit) 115, a RAM 116, a HDD (Hard Disk Drive) 117, a serial bus I / F 118, a NIC (Network Interface Card) 119, and a WLAN I. / F120, USB (Universal Serial Bus) device I / F 121, USB host 122, memory card I / F 123, and the like.

  The controller 110 controls each part of the image forming apparatus 10. The controller 110 includes a CPU 111 that is a microprocessor that executes various core processes, a timer 112 having a timekeeping function, a ROM 113 that stores an initial program executed by the CPU 111 at startup and various setting data, and the CPU 111 includes the image forming apparatus 10. This is an integrated circuit (IC) for image processing that has a RAM 113 used for temporarily storing programs and intermediate processing data when performing control, and hardware elements for image processing. ASIC 115 having the role of a bridge, RAM 116 used for temporarily storing programs and intermediate processing data when ASIC 115 performs processing, HDD for storing control programs executed by CPU 111 and various data 17, a serial bus I / F 118 that connects the image forming apparatus 10 and a peripheral device (not shown) by serial connection, an NIC 119 that is an expansion card connected to an expansion slot (not shown) and is a LAN connection interface, and the image forming apparatus 10 A USB device I / F 121 that connects a USB-compatible peripheral device (not shown), a USB host 122 that connects an NFC reader / writer 11 (to be described later) to the controller 110 by a USB cable, and a memory card that connects the memory card to the controller 110 An I / F 123 is provided.

  The operation unit 130 is an operation panel serving as a UI for receiving and displaying various operation inputs by the user. The fax control unit 140 performs control when the image forming apparatus 10 performs various operations related to fax transmission / reception with an external device (not shown). The plotter 150 is a device that visually outputs data. A printer can be used instead of the plotter 150. The scanner 160 is a device that reads original paper as electronic data.

  Note that reading and writing of information with respect to an NFC-equipped device such as an NFC-compatible IC card, RFID device, or NFC-equipped device is controlled by the CPU 111 transmitting a command to the NFC reader / writer 11, and the NFC reader / Writer 11 is realized by communicating with an NFC-equipped device. Data such as network association information, pairing information, user authentication information, and key information for accessing the authentication information is transmitted and received through the USB communication path. For this reason, there is a concern about leakage of information due to the USB bus being monitored. For this reason, the transmission and reception of commands and data on the USB bus are encrypted. Before encryption, the USB host 122 authenticates with the NFC reader / writer 11 and generates a common key obtained from the result. The USB bus is secured by performing encryption (and decryption) using this common key.

  Since NFC communication is short-range communication, there may be a case where communication is interrupted during connection. If NFC communication is interrupted before a new certificate is obtained from the certificate authority and written to the NFC-equipped device, it is stored in the RAM 114 for a certain period. If there is an access from the corresponding NFC-equipped device within this period, updating using the stored certificate information is enabled. If there is no access from the corresponding NFC-equipped device within a certain period, the acquired certificate is discarded, and the user reacquires the certificate from the certificate authority.

(Software configuration)
FIG. 3 is a diagram illustrating an example of a functional configuration of the image forming apparatus 10 according to the embodiment of the present disclosure.

  As shown in FIG. 3, the image forming apparatus 10 includes various applications, various services as an API (Application Programming Interface), an OS 230, an engine control board 240, various hardware resources, and the like. In addition, the vertical relationship of each layer shown in the figure is based on the calling relationship between layers. That is, information and signals are exchanged between components adjacent in the vertical direction.

  The layer above the API is a portion in which an application program that realizes functions provided in the image forming apparatus 10 (for example, copying, fax transmission / reception, printer, Web communication) is mounted. For example, a copy application 210a that realizes a function related to copying, a fax application 210b that realizes a function related to fax transmission, a printer application 210c that realizes a function related to printer output, a Web application 210d that realizes a function related to Web communication, and the like. included.

  Various services as APIs are portions where lower functions commonly used by each application are mounted. For example, a system control service 220a, a fax control service 220b, an engine control service 220c, a memory control service 220d, an operation unit control service 220e, a network control service 220f, and an authentication control service 220g are included.

  The system control service 220a, the fax control service 220b, the engine control service 220c, the memory control service 220d, the operation unit control service 220e, and the network control service 220f are APIs that allow each application to use corresponding hardware resources. It is.

  The authentication control service 220g performs authentication for using each application described above. Each application can be used only after successful authentication. In addition, it is possible to select an application that can be used for each registered user, and it is possible to perform function restriction for each user by performing personal authentication.

  The OS 230 is a part in which lower functions commonly used by each service are mounted. The engine control board 240 is a part where a program group for controlling the engine (hardware) such as the plotter engine 150, the scanner engine 160, and other hardware resources 170 is mounted.

  With the above configuration, in the image forming apparatus 10 according to the present exemplary embodiment, as described above, the authentication control service 220g performs personal authentication for using each of the above applications. These applications can only be used after successful network association, pairing and personal authentication. Details of the authentication control service 220g will be described later with reference to FIG.

(Authentication control service)
FIG. 4 is a diagram illustrating an example of a software module configuration focusing on the authentication control service 220g in FIG.

  When the authentication control service 220g corresponding to NFC receives an authentication request or a pairing or association request with a device from each of the above-described applications, it passes to the operation unit (operation panel) 130 via the drawing processing module 390 and the graphic driver 400. A predetermined display process is performed. Then, through the NFC R / W device driver 320 and the USBHOST device driver 330 that control the USB-connected NFC reader / writer 11 via the NFC resource manager 310, setting information for association or pairing from an NFC-equipped device The certificate information is acquired, and the acquired certificate information is stored in a file system using an address book DB module 360 that manages the address book DB for an authentication address book DB (not shown) provided in the HDD 117. Inquiry through 370 and HDD driver 380, or through network / network device 340 to external CA server (certificate authority) 30 and access point 40 connected via network, through WLAN / NIC device driver 350 The alignment have done. Detailed information during the inquiry and the result of the inquiry are output to the application 210 as to whether the authentication has succeeded or failed.

  Here, the NFC resource manager 310 provides a resource management function corresponding to NFC, and enables allocation of various hardware resources among a plurality of applications according to priority. The USBHOST device driver 330 determines whether or not a USB-connected device is a control target, and the NFC R / W device driver 320 initializes the USB-connected NFC reader / writer 11 or sets a predetermined setting. To go. The HDD driver 380 is a device driver that drives and controls the HDD 117, and the file system 370 is a program that manages files stored in the HDD 117 and has functions such as security and reliability. It should be noted that, in the authentication address book DB, when registered certificate information and certificate information are provided for each user, the user's mail address is stored in association with the certificate information. The When certificate information is provided for each NFC-equipped device, the certificate information is stored in association with the email address of the administrator of the NFC-equipped device.

(Certificate information update process 1)
Next, in the present embodiment, a basic certificate information update process for an NFC-equipped device will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a basic certificate information update process for an NFC-equipped device according to the present embodiment.

  In addition, the process (control) demonstrated below is performed by the controller 110 which is executing the above-mentioned program group. The processing described below is started in response to an authentication request from any application. At this time, the authentication control service 220g causes the operation unit 130 to display to prompt the user to hold the NFC-equipped device (for example, the NFC token 20a) over the NFC reader / writer 11 under the control of the drawing processing module 390 and the graphic driver 400.

  First, when the user holds the NFC-equipped device over the NFC reader / writer 11 of the image forming apparatus 10, NFC communication is started between the NFC-equipped device and the NFC reader / writer 11. When NFC communication is started, first, the controller 110 that executes the above-described program group reads certificate information from the NFC-equipped device, and acquires certificate expiration date information related to the image forming apparatus 10. (Step S501). Here, it is assumed that the acquired certificate information includes expiration date information. At this time, user authentication is also performed.

  Next, by comparing the expiration date information with the current date and time acquired from the timer 112 of the image forming apparatus 10, it is determined whether to notify the user according to the date of the expiration date and the current time (date) (step S502). ). For example, if it is set to notify from how many days before the expiration date, it is determined that the user is notified when the current date and time is after that date.

  If it is determined to notify the user (Yes in step S502), the user is notified (step S503). The notification means at this time can be implemented by display on the operation unit 130, notification by sound or light, printing on paper using a printing function, and sending an e-mail to a designated mail server. Or these may be combined. The notification method and the number of days before the expiration date may be set by the user using an application or the like, or may be set by the administrator. FIG. 6 shows a screen example in the case where notification is given by display on the operation unit 130. This notification screen 600 notifies the user that the expiration date and the expiration date are approaching.

  Next, after notifying the user, it is determined whether there is a certificate update request from the user (step S504). This determination is made, for example, when the update button 610 is pressed on the notification screen 600 shown in FIG. 6 and when there is an update request, and when the close button 620 is pressed, it is determined that there is no update request. In addition, this step is also shifted to when the user is not notified (No in step S502). On the other hand, it is possible to set the certificate to be automatically renewed without always notifying the certificate with a fixed expiration date. If such a setting is made, the expiration date is fixed. It is determined that there is a renewal request for a certificate within the expiration date.

  Next, when there is a request for certificate renewal (Yes in step S504), new certificate information is acquired from the CA server (certificate authority) 30 via the network (step S505).

  Then, the certificate information is updated by writing the acquired new certificate information in the memory area of the NFC-equipped device (step S506). In this case, the NFC-equipped device may hold a plurality of pieces of certificate information related to the image forming apparatus 10.

  On the other hand, if there is no certificate update request (No in step S504), the series of processing ends.

(Certificate information update process 2)
Next, in the present embodiment, a process for updating certificate information including a special case for an NFC-equipped device will be described with reference to FIG. FIG. 7 is a flowchart showing an example of a certificate information update process including a special case for an NFC-equipped device in the present embodiment.

  In addition, the process (control) demonstrated below is performed by the controller 110 which is executing the above-mentioned program group. In addition, the processing described below is started in response to an authentication request by any application, but includes a step automatically executed by the authentication control service 220g in the flow shown in FIG. (See below).

  First, when a user holds an NFC-equipped device (for example, the NFC token 20a) over the NFC reader / writer 11 of the image forming apparatus 10, NFC communication is started between the NFC-equipped device and the NFC reader / writer 11. When NFC communication is started, first, the controller 110 executing the above-described program group reads certificate information from the NFC-equipped device (step S701).

  Then, from the acquired certificate information, the certificate expiration date information and notification e-mail address related to the image forming apparatus 10 are acquired (step S702). Here, it is assumed that the acquired certificate information includes expiration date information and a notification e-mail address. Then, the certificate, expiration date, and notification e-mail address information for each user (or for each NFC-equipped device) are stored in the address book DB of the HDD 11 in association with each other. At this time, user authentication is also performed.

  Next, it is determined whether or not the acquired certificate information has expired (step S703). If the expiration date has not expired (No in step S703), the process proceeds to step S706. Here, as an example, the determination is made based on whether or not the acquired certificate information has expired, but the current date and time is within a predetermined range before the expiration date of the read certificate information. You may make it judge by whether it becomes.

  On the other hand, if the expiration date has expired (Yes in step S703), it is determined whether the automatic update setting is valid (step S704). At this time, if the automatic update setting is not valid (No in this step), the process proceeds to step S706. Note that the automatic update setting is performed by pressing an automatic update button 810 on an automatic update setting screen 800 displayed on the operation unit 130 by any application as shown in FIG. Valid. In addition, when the automatic update invalid button 820 is pressed, automatic update is invalidated.

  By the way, the processing of steps S706 to S710 in this flowchart is the same as the processing of steps S502 to S506 described above, and the description thereof is omitted here, but after updating in step S710, the process proceeds to step S711. .

  If the automatic update setting is valid (Yes in step S704), an automatic update process is performed (step S705). Specifically, new certificate information is acquired from the CA server (certificate authority) 30 via the network. Then, the certificate information is updated by writing the acquired new certificate information in the memory area of the NFC-equipped device, and the process proceeds to step S711.

  In steps S702 to S705, the certificate expires if there is no access by the NFC-equipped device or if the user rejects the update even if the user receives a notification regarding the certificate expiration date. Since there is certificate information that has expired when there is an access from an NFC-equipped device, it can be set to automatically perform the renewal procedure. .

  In step S711, it is determined whether update of certificate information is completed. If it has been completed (that is, if the certificate information has been successfully updated) (Yes in this step), the series of processing ends.

  On the other hand, when the update process is incomplete (that is, when updating the certificate information in the NFC-equipped device, NFC communication is performed before or during the writing of the new certificate information acquired from the certificate authority into the NFC-equipped device. If the certificate information update fails (No in this step), the new certificate information acquired in step S705 is stored in the address book DB in the HDD 117 as a storage unit for a certain period (step). S712). Although not described above, when there is an access by the corresponding NFC-equipped device while the certificate information is being stored, new certificate information is not newly acquired from the CA server 30, and step S705 is performed. Alternatively, in step S710, the process of writing the stored certificate information to the NFC-equipped device is resumed. Note that the user can arbitrarily set the period for storing the certificate information in step S712, and can notify the user by e-mail when the storage expiration time approaches.

  As another embodiment, there is no access from the NFC-equipped device holding the certificate information based on the expiration date information of the certificate information of the NFC-equipped device acquired and stored in step S702. Even in this case, when the expiration date approaches, it is preferable to notify the user of information related to the expiration date to the stored notification email address via the network. Also in this case, the user can arbitrarily set at what timing the notification is made for the expiration date. Note that the above-described processing procedure is an example for description, and can be modified according to the usage mode.

  As described above, in the image forming apparatus 10 of this embodiment, the update procedure is performed before the expiration date is expired by notifying the user that the expiration date of the certificate information held in the NFC-equipped device is approaching. Guidance is possible. Even when there is no access from an NFC-equipped device, the user can be notified by e-mail before the expiration date of the certificate information. Further, when the certificate information update for the NFC-equipped device fails, the certificate information can be stored in the image forming apparatus 10. Further, when the certificate information is stored in the image forming apparatus main body, it can be updated by using the certificate information stored at the next access by NFC communication. It is also possible to prevent the use of a certificate whose validity period has expired. In addition, the user can update the certificate of the NFC-equipped device only by responding (manipulating) himself or automatically.

(Other embodiments)
Note that various programs executed by the image forming apparatus of the present embodiment are provided by being incorporated in advance in a ROM or the like. However, a CD-ROM or a flexible disk (FD) can be installed in an installable or executable file. , A CD-R, a DVD (Digital Versatile Disk), or the like may be provided by being recorded on a computer-readable recording medium. Further, it may be configured to be provided / distributed by being stored on a computer connected to a network such as the Internet and downloaded via the network.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 11 ... NFC reader / writer (reading means, writing means)
20a ... NFC token 20b ... NFC-equipped mobile terminal 30 ... CA server (certificate authority)
40 ... access point 50 ... e-mail server 110 ... controller 111 ... CPU (notification means)
112 ... Timer 113 ... ROM
114 ... RAM
115 ... ASIC
116 ... RAM
117 ... HDD
118 ... Serial bus 119 ... NIC (communication connection means, notification means)
120 ... WLAN I / F (communication connection means, notification means)
121 ... USB device I / F
122 ... USB host 123 ... Memory card I / F
130 ... Operation unit (operation panel) (notification means)
140: Fax control unit 150 ... Plotter 160 ... Scanner 170 ... Other hardware resources

JP 2006-239930 A

Claims (5)

Communication connection means for connecting to a wired or wireless communication line;
Reading means for reading individual certificate information held in the memory area of the NFC-equipped device;
Storage means for storing certificate information read by the reading means;
Notification means for notifying the user according to the expiration date of the certificate information read by the reading means;
First acquisition means for acquiring new certificate information from a certificate authority through the wired or wireless communication line via the communication connection means;
Whether to store the acquired new certificate information in the storage unit for a certain period when NFC communication is disconnected before writing the new certificate information acquired by the first acquisition unit to the NFC-equipped device. First setting means for
An electronic device characterized by comprising: Further comprising a writing means for writing the new certificate information obtained by the previous SL first acquisition means in the memory area of the NFC mounted device,
If there is an access by NFC communication from the corresponding NFC-equipped device while the new certificate information is stored in the storage unit by the first acquisition unit, the writing unit causes the corresponding NFC-equipped device to 2. The electronic device according to claim 1, wherein new certificate information stored in the storage means is written . A second acquisition unit that acquires an expiration date of the read certificate information and a mail address associated with the certificate information, and stores the acquired date in the storage unit;
The electronic device according to claim 1, wherein the notification unit transmits the notification to a corresponding mail server via the communication line based on the mail address. When the reading means reads individual certificate information held in the memory area of the NFC-equipped device, the current date is within a predetermined range before the expiration date of the read certificate information The electronic device according to any one of claims 1 to 3 , further comprising a second setting unit configured to set whether to update automatically. A communication connection step for connecting to a wired or wireless communication line;
A reading process of reading individual certificate information held in the memory area of the NFC-equipped device;
A storage step of storing the certificate information read by the reading step;
A notification step for notifying the user according to the expiration date of the certificate information read by the reading step;
A first acquisition step of acquiring new certificate information from a certificate authority through the wired or wireless communication line through the communication connection step;
If the NFC communication is disconnected before writing the new certificate information acquired in the first acquisition step into the NFC-equipped device, whether the acquired new certificate information is stored in the storage step for a certain period of time. A first setting step for setting;
A method for controlling an electronic device, comprising:

Images