Specific communication device, computer program for specific communication device, and method

Abstract

To provide a technique to inform a user of which of a plurality of communication devices is indicated by information displayed on an external device.SOLUTION: A specific communication device comprises: a communication interface that can execute wireless communication with an external device; a display unit; a transmission unit that transmits specific identification information for identifying the specific communication device to the outside through the communication interface, wherein when the external device receives the specific identification information from the specific communication device, it displays a screen including the specific identification information; and a first changing unit that, when a specific condition is satisfied including the transmission of the specific identification information to the outside, changes the state of the display unit from a first state to a second state, wherein the first state is a state in which the display unit does not display the specific identification information, and the second state is a state in which the display unit displays the specific identification information.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] This specification discloses a technology relating to a specific communication device capable of communicating with an external device. [Background technology]

[0002] In Patent Document 1, an information processing device receives information indicating a communication device (e.g., a MAC address, an IP address) from each of a plurality of communication devices using wireless communication according to BLE (an abbreviation for Bluetooth (registered trademark) Low Energy). The information processing device displays a list of a plurality of pieces of information indicating the plurality of communication devices (e.g., IP addresses). A user of the information processing device uses the list to select one of the plurality of communication devices. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-184169 Summary of the Invention [Problem to be solved by the invention]

[0004] A user of an information processing device can recognize the existence of multiple communication devices by using the list, but the user may not know which of the multiple communication devices the information in the list indicates.

[0005] This specification provides a technique for informing a user which of a plurality of communication devices information displayed on an external device indicates. [Means for solving the problem]

[0006] A specific communication device disclosed in this specification comprises a communication interface capable of performing wireless communication with an external device, a display unit, a transmission unit that transmits specific identification information that identifies the specific communication device to the outside via the communication interface, wherein the external device displays a screen including the specific identification information when receiving the specific identification information from the specific communication device, and a first change unit that changes the state of the display unit from a first state to a second state when specific conditions are met, including the specific identification information being transmitted to the outside, wherein the first state is a state in which the display unit does not display the specific identification information, and the second state is a state in which the display unit displays the specific identification information.

[0007] According to this configuration, in a situation where there are multiple communication devices including a specific communication device, a user can see the specific identification information displayed on the specific communication device and know that the specific identification information displayed on the external device indicates a specific communication device among the multiple communication devices.

[0008] A control method for realizing the above-mentioned specific communication device, a computer program, and a computer-readable recording medium storing the computer program are also novel and useful. [Brief explanation of the drawings]

[0009] [Figure 1] 1 shows the configuration of a communication system according to a first embodiment. [Figure 2] FIG. 2 shows a block diagram of a terminal device and a multi-function device. [Figure 3] 10 shows a sequence diagram of a process for connecting a multi-function device to a wireless LAN using a terminal device in the first embodiment. [Figure 4] A continuation of Figure 3 is shown. [Figure 5] 10 shows a sequence diagram of a process for connecting a multi-function device to a wireless LAN using a terminal device in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] (First Example) (Configuration of communication system 2; Figure 1) As shown in FIG. 1, the communication system 2 includes a terminal device 10, two multifunction devices 100 and 200 (hereinafter, the multifunction devices will be referred to as "MFPs (short for Multifunction Peripheral)"), and an access point 8 (hereinafter, the access point will be referred to as "AP"). The terminal device 10 is a mobile terminal such as a tablet PC or a smartphone. In a modified example, the terminal device 10 may be a terminal device such as a desktop PC or a notebook PC.

[0011] The APs 8 form a wireless LAN (an abbreviation for Local Area Network). The terminal device 10 and the MFP (for example, 100) can be connected to the wireless LAN formed by the APs 8.

[0012] (MFP100 configuration; Figure 2) The MFP 100 is a peripheral device (for example, a peripheral device of the terminal device 10) that can perform multiple functions including printing, scanning, and facsimile functions. The MFP 100 includes a display unit 112, an operation unit 114, a wireless LAN interface 120, a Bluetooth (registered trademark) interface 122, a print execution unit 124, and a control unit 130. Each unit 112 to 130 is connected to a bus line (reference numerals omitted). The print execution unit 124 includes a printing mechanism such as an inkjet system or a laser system. Note that, hereinafter, the interface will be referred to as "I / F" and Bluetooth will be referred to as "BT."

[0013] Display unit 112 is a display for displaying various information. Operation unit 114 has a plurality of keys. A user can input various instructions to MFP 100 by operating operation unit 114. Display unit 112 functions as a touch panel (i.e., operation unit 114) that accepts instructions from the user. Note that in a modified example, display unit 112 does not have to function as a touch panel.

[0014] The wireless LAN I / F 120 is an I / F for executing communication via a wireless LAN. The communication via a wireless LAN is, for example, communication according to the Wi-Fi system (hereinafter referred to as "Wi-Fi communication"). The Wi-Fi system is a wireless communication system for executing wireless communication according to, for example, the IEEE (The Institute of Electrical and Electronics Engineers, Inc.) 802.11 standard and standards equivalent thereto (e.g., 802.11a, 11b, 11g, 11n, 11ac, etc.).

[0015] The BTI / F 122 is an I / F for executing wireless communication according to the BT method (hereinafter referred to as "BT communication"). The BT method is a wireless communication method based on the IEEE802.15.1 standard or a standard equivalent thereto, for example. More specifically, the BTI / F 122 supports BLE (an abbreviation for Bluetooth Low Energy). BLE is a standard implemented in BT method version 4.0 and later versions. The BTI / F 122 can execute wireless communication according to BLE (hereinafter referred to as "BLE communication").

[0016] The differences between the Wi-Fi system and the BT system will now be described. The communication speed of Wi-Fi communication (for example, a maximum communication speed of 600 Mbps) is faster than the communication speed of BT communication (for example, a maximum communication speed of 24 Mbps). The carrier wave frequency in Wi-Fi communication is the 2.4 GHz band or the 5.0 GHz band. The carrier wave frequency in BT communication is the 2.4 GHz band. In other words, when the 5.0 GHz band is adopted as the carrier wave frequency in Wi-Fi communication, the carrier wave frequency in Wi-Fi communication differs from the carrier wave frequency in BT communication. In addition, the maximum distance over which Wi-Fi communication can be performed (for example, approximately 100 m) is longer than the maximum distance over which BT communication can be performed (for example, approximately several tens of meters).

[0017] The control unit 130 includes a CPU 132 and a memory 134. The CPU 132 executes various processes in accordance with a program 140 stored in the memory 134. The memory 134 is configured by a volatile memory, a non-volatile memory, or the like.

[0018] The model name of MFP 100 is "MF1," and a serial number of "ABCDEFG" is assigned to MFP 100. The model name "MF1" and the serial number "ABCDEFG" are stored in memory 134. Furthermore, manufacturer information MI1 indicating the manufacturer of MFP 100 is stored in memory 134.

[0019] The MFP200 is an MFP manufactured by the same manufacturer as the MFP100. The MFP200 is the same model as the MFP100. The MFP200 has the same configuration as the MFP100. The MFP200 is assigned the serial number "HIJKLMN". The MFP200 stores the model name "MF1", manufacturer information MI1, and serial number "HIJKLMN".

[0020] (Configuration of terminal device 10; Figure 2) The terminal device 10 includes a display unit 12, an operation unit 14, a wireless LAN I / F 20, a BTI / F 22, and a control unit 30. The units 12 to 30 are connected to a bus line (reference numerals omitted).

[0021] The display unit 12 is a display for displaying various information, and the operation unit 14 is, for example, a touch panel. The operation unit 14 is capable of receiving various instructions.

[0022] The control unit 30 includes a CPU 32 and a memory 34. The CPU 32 executes various processes in accordance with programs 40 and 42 stored in the memory 34. The memory 34 is configured with a volatile memory, a non-volatile memory, etc. The OS (short for Operating System) program 40 is a program for executing basic processes of the terminal device 10. The application program 42 (hereinafter referred to as "app 42") is a program for connecting the MFP (e.g., 100) to a wireless LAN.

[0023] (Processing for connecting the MFP to a wireless LAN; Figures 3 and 4) The processing performed by the communication system 2 will be described with reference to Figs. 3 and 4. Specifically, Figs. 3 and 4 show a case in which the terminal device 10 is used to connect the MFP 100 to a wireless LAN formed by the AP 8 (hereinafter referred to as the "target wireless LAN"). In the initial stage of this case, the terminal device 10 is currently connected to the target wireless LAN. Note that, in a modified example, the terminal device 10 may not currently be connected to the target wireless LAN. Furthermore, in the following, for ease of understanding, the processing performed by each CPU of each device (e.g., the CPU 132 of the MFP 100) will be described with each device (e.g., the MFP 100) as the subject, rather than each CPU as the subject.

[0024] In this case, it is assumed that MFPs 100 and 200 are newly installed in a predetermined area (for example, an office). In T10A, after installing MFP 100, the user performs an operation on operation unit 114 of MFP 100 to turn on the power of MFP 100.

[0025] When MFP 100 receives a power-on operation from a user at T10A, it displays operation screen SC1A on display unit 112 at T12A. Operation screen SC1A includes buttons for receiving instructions to execute various functions of MFP 100 (e.g., copy, scan, etc.).

[0026] Furthermore, in T14A, the MFP 100 starts broadcasting an Advertise signal conforming to BLE via the BTI / F 122. The Advertise signal includes the model name "MF1" of the MFP 100, manufacturer information MI1, identification information "DEFG", and a device ID that identifies the BTI / F 122. Here, the identification information "DEFG" is the last four characters of the serial number "ABCDEFG" of the MFP 100, and is information for identifying the MFP 100. Note that in a modified example, the identification information is not limited to the last four characters of the serial number "ABCDEFG", but may be another part of the serial number "ABCDEFG" (for example, the last three characters, the first four characters, the middle four characters, four characters randomly selected from the serial number "ABCDEFG", etc.).

[0027] Also, in T10B, after installing the MFP200, the user performs an operation on the operation unit (reference numeral omitted) of the MFP200 to turn on the power of the MFP200. In T14B, the MFP200 starts to broadcast an Advertise signal including the model name "MF1" of the MFP200, manufacturer information MI1, identification information "KLMN", and a device ID that identifies the BTI / F of the MFP200. Here, the identification information "KLMN" is the last four characters of the serial number "HIJKLMN" of the MFP200.

[0028] After the power of the MFP 200 is turned on, the MFP 100 receives an Advertise signal from the MFP 200 via the BTI / F 122 at T14B. In this embodiment, the MFP 100 executes the processing from T20 onwards, triggered by receiving an Advertise signal from another MFP (for example, the MFP 200). In other words, the MFP 100 does not execute the processing from T20 onwards until it receives an Advertise signal from the other MFP.

[0029] In T20, MFP 100 determines whether the Advertise signal received from another MFP includes both the same model name, "MF1," as the model name of MFP 100, and the same manufacturer information as the manufacturer information MI1 of MFP 100. In this case, MFP 100 determines that the Advertise signal received from MFP 200 includes both the same model name, "MF1," as the model name of MFP 100, and the same manufacturer information as the manufacturer information MI1 of MFP 100 (YES in T20), and proceeds to T22A.

[0030] In T22A, MFP 100 displays operation screen SC2A on display unit 112 instead of operation screen SC1A (T12A). Operation screen SC2A is the same as operation screen SC1A except that it includes identification information "DEFG" in the upper right corner of the screen.

[0031] Furthermore, if the other MFP is a device different from MFP 200 (for example, a different model MFP), MFP 100 determines that the Advertise signal received from the other MFP does not include at least one of the model name "MF1" of MFP 100 and manufacturer information identical to manufacturer information MI1 of MFP 100 (NO in T20). In this case, MFP 100 does not execute the process of T22A. That is, MFP 100 maintains the display of operation screen SC1A.

[0032] Also, in this case, MFP200 receives an Advertise signal from MFP100 that includes the model name "MF1" of MFP100 and manufacturer information MI1 (T14A). Receipt of the Advertise signal from MFP100 triggers MFP200 to execute the determination of T20, just like MFP100. In this case, MFP200 determines that the Advertise signal received from MFP100 includes both the same model name as MFP200's model name "MF1" and the same manufacturer information as MFP200's manufacturer information MI1, and proceeds to T22B.

[0033] In T22B, MFP200 displays operation screen SC2B on display unit 112. Operation screen SC2B is similar to operation screen SC1A except that it includes identification information "KLMN" in the upper right corner of the screen. In this case, in a situation where two MFPs 100 and 200 of the same model are installed in a predetermined area, one MFP 100 displays identification information "DEFG" and the other MFP 200 displays identification information "KLMN."

[0034] At T30, the user inputs an instruction to start the application 42 to the operation unit 14 of the terminal device 10. In response to this, the terminal device 10 starts the application 42.

[0035] As described above, the MFPs 100 and 200 start transmitting Advertise signals at T14A and T14B, respectively. In this case, after the application 42 is started, the terminal apparatus 10 receives Advertise signals from the MFPs 100 and 200 at T34A and T34B, respectively.

[0036] In the following T36, the terminal device 10 displays a selection screen SC3 on the display unit 12. The selection screen SC3 is a screen for selecting a target device to connect to the target wireless LAN. The selection screen SC3 includes a list of information contained in the Advertise signal received in T34A and T43B. In this case, the list includes a combination of the model name "MF1" and the identification information "DEFG", and a combination of the model name "MF1" and the identification information "KLMN".

[0037] The user looks at the screens of MFPs 100 and 200 to confirm the target devices to connect to the target wireless LAN. In this case, the user selects MFP 100 as the target device. Looking at operation screen SC2A of MFP 100, the user can see the identification information "DEFG" that identifies MFP 100. Then, looking at selection screen SC3 of terminal device 10, the user can see that the identification information "DEFG" in the list indicates MFP 100 of the two MFPs 100 and 200.

[0038] For example, a comparative example is assumed in which only selection screen SC3 is displayed, and the identification information "DEFG" and "KLMN" are not displayed on MFPs 100 and 200. In this comparative example, although the identification information "DEFG" and "KLMN" are included in selection screen SC3, there is a possibility that the user does not know which of MFPs 100 and 200 each of the identification information "DEFG" and "KLMN" indicates. In contrast, in this embodiment, the identification information "DEFG" and "KLMN" are displayed on MFPs 100 and 200 (T22A, T22B). It is possible to inform the user whether the identification information "DEFG" and "KLMN" displayed on terminal device 10 indicates which of MFPs 100 and 200.

[0039] At T38, the terminal device 10 receives an operation from the user via the operation unit 14 to select the identification information "DEFG" on the selection screen SC3.

[0040] 4, the terminal apparatus 10 unicasts a scan request conforming to BLE to the MFP 100 identified by the identification information "DEFG" selected in T38, with the device ID of the MFP 100 as the destination. As a result, the MFP 100 transmits a scan response to the scan request to the terminal apparatus 10, and at T50, pairing is established between the terminal apparatus 10 and the MFP 100.

[0041] When the terminal device 10 establishes pairing with the MFP 100 in T50, in T52, the terminal device 10 displays an input screen SC4 on the display unit 12. The input screen SC4 includes input fields for inputting connection information (i.e., SSID (short for Service Set Identifier) ​​and password) for connecting to the target wireless LAN.

[0042] When the terminal device 10 receives an operation to input connection information on the input screen SC4 via the operation unit 14 at T54, it transmits the connection information input at T54 to the MFP 100 at T56 via the BTI / F22 using the pairing established at T50.

[0043] When the MFP 100 receives connection information from the terminal device 10 via the BTI / F 122 using the pairing of T50 in T56, it then uses the received connection information to execute 4-way handshake communication with the AP 8 via the wireless LAN I / F 120 in T60. This establishes a wireless connection between the MFP 100 and the AP 8 via the wireless LAN I / F 120. That is, the MFP 100 is connected to the target wireless LAN formed by the AP 8.

[0044] At the next T70, the MFP 100 stops transmitting the Advertise signal. In this embodiment, the Advertise signal is used to connect to the wireless LAN. This configuration can prevent the MFP 100 from unnecessarily continuing to transmit the Advertise signal even after the connection to the wireless LAN is completed.

[0045] Furthermore, at T72, MFP 100 displays operation screen SC1A, which is the same as T12A in FIG. 3, on display unit 112, instead of operation screen SC2A (see T22A in FIG. 3). As described above, the identification information "DEFG" in operation screen SC2A is used to inform the user that the identification information "DEFG" displayed on terminal device 10 indicates MFP 100, and to connect MFP 100 to the wireless LAN. This configuration can prevent the display of identification information "DEFG" from being unnecessarily maintained even after connection to the wireless LAN is completed.

[0046] Furthermore, in this embodiment, the display of the operation screen SC2A is maintained until the transmission of the Advertise signal is stopped. That is, after the display of the operation screen SC2A, the display of the identification information "DEFG" by the operation screen SC2A is maintained while the transmission of the Advertise signal continues. For example, a comparative example is assumed in which the transmission of the Advertise signal continues, but after a predetermined time has elapsed, the operation screen SC1A is displayed instead of the operation screen SC2A. In this comparative example, a situation may occur in which the identification information "DEFG" is displayed on the terminal device 10, but the identification information "DEFG" is not displayed on the MFP 100. The configuration of this embodiment can prevent the occurrence of the above situation. Note that in a modified example, the configuration of the comparative example described above may be adopted.

[0047] In this case, in T80, terminal apparatus 10 transmits print data to MFP 100 via wireless LAN I / F 20 and AP 8. As a result, in T80, MFP 100 receives the print data from terminal apparatus 10 via wireless LAN I / F 120 and AP 8, using the wireless connection established in T60. Then, in T82, MFP 100 causes print execution unit 124 to print the image indicated by the received print data. In a variation, MFP 100 may receive an execution request to execute another function, such as scanning, from terminal apparatus 10, using the wireless connection established in T60.

[0048] (Effects of this embodiment) In this embodiment, the MFP 100 displays the operation screen SC2 including its own identification information “DEFG” (T22A in FIG. 3 ) when it receives an Advertise signal from another MFP (e.g., MFP 200). For example, a comparative example is assumed in which the operation screen SC2 is displayed even when no Advertise signal is received from another MFP. In this comparative example, the operation screen SC2 is displayed even when only the MFP 100 is installed within a predetermined area. In a situation in which only the MFP 100 is installed within a predetermined area, the user can infer that the identification information “DEFG” in the selection screen SC3 of the terminal device 10 indicates the MFP 100, even if the user does not know that the identification information “DEFG” indicates the MFP 100. According to the configuration of this embodiment, it is possible to prevent the operation screen SC2A including the identification information “DEFG” from being unnecessarily displayed in such a situation.

[0049] Furthermore, in this embodiment, MFP100 does not display operation screen SC2 if the Advertise signal received from the other MFP does not include the same manufacturer information as MFP100's manufacturer information MI1 (NO in T20). That is, MFP100 does not display operation screen SC2 if the manufacturer of the other MFP is different from that of MFP100. Generally, if the manufacturers are different, the product appearance will be different and the model name will also be different. For this reason, the user can distinguish MFP100 from the other MFPs by using the model name in selection screen SC3. In this embodiment, when the other MFP is from a different manufacturer, it is possible to prevent the operation screen SC2A including the identification information "DEFG" from being unnecessarily displayed.

[0050] Furthermore, in this embodiment, MFP 100 does not display operation screen SC2 even if the Advertise signal received from another MFP does not include a model name identical to MFP 100's model name "MF1" (NO in T20). That is, MFP 100 does not display operation screen SC2 if the other MFP is a model different from the model with model name "MF1." If the other MFP is a different model, selection screen SC3 of terminal device 10 includes not only the model name "MF1" but also the model name of the other MFP. Furthermore, model names are generally written on the housing, packaging, etc. of the MFP. It is highly likely that the user knows whether each of the two model names in selection screen SC3 indicates MFP 100 or another MFP. That is, even if identification information is not displayed on the MFP, the user can distinguish MFP 100 from another MFP using the two model names in selection screen SC3. In this embodiment, when the other MFP is a different model, it is possible to prevent the operation screen SC2A including the identification information "DEFG" from being displayed unnecessarily.

[0051] For example, a comparative example is assumed in which the identification information included in the Advertise signal and the identification information included in the operation screen SC2A are the same as the serial number "ABCDEFG." In this comparative example, there is a possibility that the entire serial number "ABCDEFG" may be known to a third party other than the user. Furthermore, the serial number is a relatively long character string and has lower visibility than a short character string. According to the configuration of this embodiment, by using the identification information "DEFG," which is a part of the serial number "ABCDEFG," it is possible to prevent the entire serial number "ABCDEFG" from being known to a third party. Furthermore, by using the identification information "DEFG," which is a short character string, it is possible to prevent a decrease in visibility. Note that the configuration of the above comparative example may be adopted in a modified example.

[0052] (Correspondence) The MFP 100, BTI / F 122, display unit 112, and identification number "DEFG" are examples of a "specific communication device," a "communication interface," a "display," and a "specific identification information," respectively. The MFP 200 and identification number "KLMN" are examples of an "other communication device" and a "other identification information," respectively. The AP8 is an example of an "access point." The terminal device 10 is an example of an "external device." The state in which the operation screen SC1A is displayed at T12A in FIG. 3, the state in which the operation screen SC2A is displayed at T22A, and the state in which the operation screen SC1A is displayed at T72 in FIG. 4 are examples of a "first state," a "second state," and a "third state," respectively. The manufacturer information MI1 and the model name "MF1" are examples of "manufacturer information" and "model information," respectively. A determination of YES at T20 in FIG. 3 is an example of a "specific condition."

[0053] T14A and T22A in Fig. 3 are examples of the processes realized by the "transmitting unit" and the "first changing unit", respectively.

[0054] (Second Example) In this embodiment, the timing at which the operation screen SC2A is displayed is different from that in the first embodiment. The configuration of the communication system 2 in the second embodiment is the same as that in the first embodiment.

[0055] (Process of connecting the MFP to a wireless LAN; Figure 5) T100, T102, T130, and T134 are the same as T10A, T12A, T30, and T34A in Fig. 3. Here, unlike the first embodiment, the application 42 of this embodiment is configured to transmit a Scan request to the sender of the Advertise signal in response to receiving an Advertise signal after the application 42 is started. In other words, the application 42 of this embodiment is configured to transmit a Scan request to the sender of the Advertise signal before a selection is made on the selection screen SC3 (see T36 in Fig. 3).

[0056] Furthermore, when the MFP 100 starts transmitting an Advertise signal in T134, it monitors in T140 whether or not a Scan request is received from the outside via the BTI / F 122. The MFP 100 maintains the display of the operation screen SC1A until a Scan request is received from the outside.

[0057] Furthermore, when a scan request is received from the outside (YES in T140), in T144, MFP 100 displays operation screen SC2A on display unit 112. After T144, the same processes as T36 and T38 in FIG. 3 and T48 to T82 in FIG. 4 are executed.

[0058] (Effects of this embodiment) For example, if the application 42 is not running, even if the terminal device 10 receives an Advertise signal, the terminal device 10 does not transmit a Scan request. Furthermore, for example, if the terminal device 10 is located far from the MFP 100, the terminal device 10 cannot receive the Advertise signal and does not transmit a Scan request. If the application 42 is not running or if the terminal device 10 is located far from the MFP 100, it is estimated that the process of connecting the MFP 100 to the target wireless LAN is unlikely to be executed. In this embodiment, the display of the operation screen SC1A is maintained until a Scan request is received from the outside (NO in T140). In this embodiment, when it is estimated that the process of connecting the MFP 100 to the target wireless LAN is unlikely to be executed, it is possible to prevent the operation screen SC2A including the identification information “DEFG” from being unnecessarily displayed. The Scan request is an example of a “predetermined signal.”

[0059] Although specific examples of the present invention have been described above in detail, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. Modifications of the above-mentioned embodiments are listed below.

[0060] (Variation 1) The "specific communication device" is not limited to the MFP 100, but may be a printer, scanner, fax machine, desktop PC, notebook PC, or the like.

[0061] (Variation 2) The "communication interface" is not limited to BTI / F 122, and may be, for example, wireless LAN I / F 120. In a variation in which the "communication interface" is wireless LAN I / F 120, MFP 100 may broadcast a beacon signal including identification information "DEFG" to the outside via wireless LAN I / F 120.

[0062] (Variation 3) The "specific identification information" is not limited to a part of the serial number, but may be, for example, other information different from the serial number (for example, the printer name, at least a part of the IP address, etc.).

[0063] (Variant 4) "Transmitting specific identification information to the outside" is not limited to transmitting an Advertise signal containing the identification information, but may also be transmitting another signal (e.g., a Scan request) containing the identification information according to the BT method, for example.

[0064] (Variation 5) Before display unit 112 displays operation screen SC2A, display unit 112 may not be displaying any screen. In this variation, the state in which display unit 112 is not displaying any screen is an example of the "first state."

[0065] (Variation 6) In the first embodiment described above, MFP 100 executes the determination of T20 in Fig. 3 and displays operation screen SC2A, triggered by receiving an Advertise signal from another MFP. Alternatively, MFP 100 may display operation screen SC2A, triggered by MFP 100 starting to transmit an Advertise signal, even if it does not receive an Advertise signal from another MFP. In this variation, it is possible to omit the step of "receiving, from another communication device, other identification information that identifies the other communication device."

[0066] (Variation 7) The determination of T20 in Fig. 3 does not have to be performed. Also, in T20 in Fig. 3, only one of the determination of whether the Advertise signals include the same model name or the determination of whether the Advertise signals include the same manufacturer information may be performed. In these variations, at least one of the "manufacturer information" and "model information" can be omitted.

[0067] (Variation 8) The "manufacturer information" is not limited to the manufacturer information MI1, but may be, for example, a character string that is part of the model name, a part of the model number, or the like.

[0068] (Variation 9) The processes of T54 to T82 in Fig. 4 do not have to be executed. In this case, MFP 100 may use pairing of T50 to transmit information indicating the status of MFP 100 (e.g., remaining ink level) to terminal device 10. In this variation, the "second receiving unit" and "establishment unit" can be omitted.

[0069] (Modification 10) The process of T72 in Fig. 4 does not have to be executed. In this modification, the "second change unit" can be omitted.

[0070] (Modification 11) The process of T70 in Fig. 4 does not have to be executed. In this modification, the "stop section" can be omitted.

[0071] 4, MFP 100 may erase operation screen SC2A and not display any screen. In this modification, the state in which no screen is displayed is an example of the "third state."

[0072] (Variant 13) In each of the above embodiments, the processes in Figures 3 to 5 are realized by software (e.g., programs 40, 42, 140, etc.), but at least one of these processes may be realized by hardware such as a logic circuit.

[0073] Furthermore, the technical elements described in this specification or drawings may exhibit technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technologies illustrated in this specification or drawings simultaneously achieve multiple objectives, and achieving one of those objectives is itself technically useful. The features of the technology disclosed in this specification are listed below. (Item 1) A specific communication device, a communication interface capable of wirelessly communicating with an external device; A display unit; a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a first change unit that changes a state of the display unit from a first state to a second state when a specific condition including the specific identification information being transmitted to the outside is satisfied, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; and A specific communication device comprising: (Item 2) the first state is a state in which the display unit displays a screen that does not include the specific identification information, Item 1. The specific communication device according to item 1, wherein the second state is a state in which the display unit displays a screen including the specific identification information. (Item 3) the communication interface is an interface for performing the wireless communication in accordance with Bluetooth (registered trademark), 3. The specific communication device according to item 1 or 2, wherein the transmitting unit transmits an Advertise signal conforming to the Bluetooth standard, the Advertise signal including the specific identification information, to the outside. (Item 4) the specific condition further includes that the specific communication device receives, via the communication interface, other identification information identifying the other communication device from another communication device; A specific communication device described in any one of items 1 to 3, wherein the state of the display unit is maintained in the first state until the other identification information is received from the other communication device via the communication interface. (Item 5) The specific communication device further a first receiving unit that receives manufacturer information indicating a manufacturer of the other communication device from the other communication device via the communication interface; the specific condition further includes that the manufacturer indicated by the received manufacturer information is the same as the manufacturer of the specific communication device; A specific communication device described in any one of items 1 to 4, wherein if the specific condition is not met because the manufacturer indicated by the received manufacturer information is not the same as the manufacturer of the specific communication device, the state of the display unit is maintained in the first state. (Item 6) The specific communication device further a second receiving unit that receives model information indicating a model of the other communication device from the other communication device via the communication interface; the specific condition further includes that the model indicated by the received model information is the same as a model of the specific communication device; A specific communication device described in any one of items 1 to 5, wherein if the specific condition is not met because the model indicated by the received model information is not identical to the model of the specific communication device, the state of the display unit is maintained in the first state. (Item 7) 7. The specific communication device according to any one of items 1 to 6, wherein the specific identification information is at least a part of a serial number of the specific communication device. (Item 8) The specific communication device further a third receiving unit that receives connection information for establishing a wireless connection with an access point from the external device via the communication interface after the external device receives the specific identification information from the specific communication device; an establishment unit that, when the connection information is received from the external device, establishes the wireless connection with the access point by using the connection information; 8. A specific communication device according to any one of items 1 to 7, comprising: (Item 9) The specific communication device further A specific communication device described in item 8, comprising a second change unit that changes the state of the display unit from the second state to a third state when the wireless connection with the access point is established, the third state being a state in which the display unit does not display the specific identification information. (Item 10) the transmitter continues transmitting the specific identification information to the outside until the wireless connection with the access point is established; The specific communication device further A specific communication device described in item 8 or 9, comprising a stopping unit that stops transmitting the specific identification information to the outside when the wireless connection with the access point is established. (Item 11) A specific communication device described in any one of items 1 to 10, wherein after the state of the display unit is changed from the first state to the second state, the state of the display unit is maintained in the second state while the transmission of the specific identification information to the outside continues. (Item 12) the specific condition includes receiving a predetermined signal from the external device via the communication interface after the specific identification information is transmitted to the outside; A specific communication device described in any one of items 1 to 11, wherein the state of the display unit is maintained in the first state until the predetermined signal is received from the external device via the communication interface. (Item 13) A computer program for a specific communication device, comprising: The specific communication device a communication interface capable of wirelessly communicating with an external device; A display unit; A computer, Equipped with The computer program causes the computer to: a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a first change unit that changes a state of the display unit from a first state to a second state when a specific condition including the specific identification information being transmitted to the outside is satisfied, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; and A specific communication device that functions as a (Item 14) A control method comprising: a transmitting step of transmitting specific identification information for identifying a specific communication device to an external device via a communication interface capable of wireless communication with an external device, the transmitting step being such that, when the external device receives the specific identification information from the specific communication device, the external device displays a screen including the specific identification information; a first change step of changing a state of a display unit of the specific communication device from a first state to a second state when a specific condition including the specific identification information being transmitted to the outside is satisfied, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A control method comprising: [Explanation of symbols]

[0074] 2: communication system, 8: access point, 10: terminal device, 12: display unit, 14: operation unit, 20: wireless LAN I / F, 22: BTI / F, 30: control unit, 32: CPU, 34: memory, 40: OS program, 42: application program, 100: MFP, 112: display unit, 114: operation unit, 120: wireless LAN I / F, 122: BTI / F, 124: print execution unit, 130: control unit, 132: CPU, 134: memory, 140: program, 200: MFP, MI1: manufacturer information, SC1A to SC3: selection screen, SC4: input screen

Claims

1. A specific communication device, a communication interface capable of wirelessly communicating with an external device; A display unit; a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a first change unit that changes a state of the display unit from a first state to a second state when specific conditions are satisfied, including that the specific identification information is transmitted to the outside and that the specific communication device receives other identification information that identifies the other communication device from the other communication device via the communication interface, the state of the display unit being maintained in the first state until the other identification information is received from the other communication device via the communication interface, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A specific communication device comprising:

2. the first state is a state in which the display unit displays a screen that does not include the specific identification information, The specific communication device according to claim 1 , wherein the second state is a state in which the display unit displays a screen including the specific identification information.

3. the communication interface is an interface for performing the wireless communication in accordance with Bluetooth (registered trademark); The specific communication device according to claim 1 or 2, wherein the transmitter transmits to the outside an Advertise signal conforming to the Bluetooth standard, the Advertise signal including the specific identification information.

4. The specific communication device according to claim 1 , wherein the specific identification information is at least a part of a serial number of the specific communication device.

5. The specific communication device further a third receiving unit that receives connection information for establishing a wireless connection with an access point from the external device via the communication interface after the external device receives the specific identification information from the specific communication device; an establishment unit that, when the connection information is received from the external device, establishes the wireless connection with the access point by using the connection information; A specific communication device according to any one of claims 1 to 4, comprising:

6. The specific communication device further 6. The specific communication device described in claim 5, further comprising: a second change unit that changes the state of the display unit from the second state to a third state when the wireless connection with the access point is established, the third state being a state in which the display unit does not display the specific identification information.

7. the transmitter continues transmitting the specific identification information to the outside until the wireless connection with the access point is established; The specific communication device further The specific communication device according to claim 5 or 6, further comprising a stop unit that stops the transmission of the specific identification information to the outside when the wireless connection with the access point is established.

8. A specific communication device described in any one of claims 1 to 7, wherein after the state of the display unit is changed from the first state to the second state, the state of the display unit is maintained in the second state while the transmission of the specific identification information to the outside continues.

9. the specific condition includes receiving a predetermined signal from the external device via the communication interface after the specific identification information is transmitted to the outside; The specific communication device according to claim 1 , wherein the state of the display unit is maintained in the first state until the predetermined signal is received from the external device via the communication interface.

10. A computer program for a specific communication device, comprising: The specific communication device a communication interface capable of wirelessly communicating with an external device; A display unit; A computer, Equipped with The computer program causes the computer to: a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a first change unit that changes a state of the display unit from a first state to a second state when specific conditions are satisfied, including that the specific identification information is transmitted to the outside and that the specific communication device receives other identification information that identifies the other communication device from the other communication device via the communication interface, the state of the display unit being maintained in the first state until the other identification information is received from the other communication device via the communication interface, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A computer program that functions as a

11. A control method comprising: a transmitting step of transmitting specific identification information for identifying a specific communication device to an external device via a communication interface capable of wireless communication with an external device, the transmitting step being such that, when the external device receives the specific identification information from the specific communication device, the external device displays a screen including the specific identification information; a first change step of changing a state of a display unit of the specific communication device from a first state to a second state when specific conditions are satisfied, including that the specific identification information is transmitted to the outside and that the specific communication device receives other identification information identifying the other communication device from the other communication device via the communication interface, wherein the state of the display unit is maintained in the first state until the other identification information is received from the other communication device via the communication interface, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A control method comprising:

12. A specific communication device, a communication interface capable of wirelessly communicating with an external device; A display unit; a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a first receiving unit that receives manufacturer information indicating a manufacturer of another communication device from the other communication device via the communication interface; a first change unit that changes a state of the display unit from a first state to a second state when certain conditions are satisfied, including that the specific identification information is transmitted to the outside and that the manufacturer indicated by the received manufacturer information is the same as the manufacturer of the specific communication device, and when the certain conditions are not satisfied because the manufacturer indicated by the received manufacturer information is not the same as the manufacturer of the specific communication device, the state of the display unit is maintained in the first state, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A specific communication device comprising:

13. A specific communication device, a communication interface capable of wirelessly communicating with an external device; A display unit; a transmission unit that transmits specific identification information that identifies the specific communication device to an external device via the communication interface, the transmission unit displaying a screen including the specific identification information when the external device receives the specific identification information from the specific communication device; a second receiving unit that receives model information indicating a model of the other communication device from the other communication device via the communication interface; a first change unit that changes a state of the display unit from a first state to a second state when certain conditions are satisfied, including that the specific identification information is transmitted to the outside and that the model indicated by the received model information is identical to the model of the specific communication device, and when the certain conditions are not satisfied because the model indicated by the received model information is not identical to the model of the specific communication device, the state of the display unit is maintained in the first state, the first state being a state in which the display unit does not display the specific identification information, and the second state being a state in which the display unit displays the specific identification information; A specific communication device comprising:

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