JP5734085B2 - Screen sharing device, screen sharing system, screen sharing method and program - Google Patents

Description

  The present invention relates to a technique for sharing a screen displayed by a computer.

  As software for sharing a screen displayed by a computer and operating a remote computer, there is software called VNC (Virtual Network Computing), for example. According to this software, a screen of a host computer (hereinafter abbreviated as “host”) is sent to a guest computer (hereinafter abbreviated as “guest”) via a network, and the host side is remotely operated on the guest side. And the guest side can share the screen to teach guest users how to set up and operate the application.

  By the way, for example, when sharing the screen and instructing the guest user to set the e-mail client, when the e-mail client is executed on the host, the e-mail address of the other party to whom the host user exchanged e-mail Such information that the guest user does not want to know is displayed on the screen, and this screen is displayed on the guest. Therefore, for example, there is an invention disclosed in Patent Document 1 as an invention that prevents information that is not desired to be known to others when sharing a screen from being displayed on the guest side.

  The invention disclosed in Patent Document 1 does not transmit information on a window to a guest when an application for which a new window is to be displayed on the host is an application registered in advance. For example, if the registered application is an application of an e-mail client, when this application tries to display a new window, the window is displayed on the host side. However, since the window information of the e-mail client is not sent to the guest, the e-mail client window cannot be viewed on the guest side, and the contents of the e-mail cannot be known.

JP 2006-338531 A

  By the way, if you want to tell the various settings of the e-mail client from the host side to the guest side while calling, for example, if you share the screen related to the various settings between the host and the guest, you can teach the settings while watching the screen. . However, the invention disclosed in Patent Document 1 restricts the display of windows on an application-by-application basis, so screen sharing and remote operation are restricted even for screens that are shown to the guest side, and settings are taught. It will take time and effort.

  The present invention has been made under the background described above, and its purpose is to limit screen sharing and remote operation regardless of the application.

  In order to solve the above-described problem, the present invention provides a communication device that communicates with another device, a restriction level that restricts screen sharing with the other device and remote operation from the other device with respect to a screen displayed on the display unit. Storage means for storing the screen data, screen data transmission means for transmitting screen data representing the screen displayed on the display unit to the other apparatus by the communication means, and the communication means received from the other apparatus An acquisition unit that specifies a screen to be displayed on the display unit according to the instruction, acquires a restriction level related to the specified screen from the storage unit, and a display control unit that displays the screen on the display unit according to the instruction The screen displayed on the display unit is controlled to restrict transmission of screen data to the other device and remote operation from the other device in accordance with the restriction level obtained by the obtaining unit. Providing screen sharing apparatus comprising a means.

  In this invention, it is good also as a structure provided with the restriction | limiting level change means which changes the said restriction | limiting level according to the state of an own apparatus.

  In the present invention, an operation unit operated by a user and a restriction level rewriting unit that rewrites the restriction level according to an operation performed by the operation means may be provided.

  Further, in the present invention, a configuration is provided that includes an operation unit operated by a user, and a stop unit that stops screen sharing with the other device and remote operation from the other device according to an operation performed by the operation unit. It is good.

  Further, in the present invention, there is provided remote operation restriction means for disabling remote operation to the other apparatus, and the display control means is data received by the communication means and is displayed on the other apparatus. The screen may be displayed on the display unit based on screen data representing a screen that is present.

  In the present invention, the acquisition unit acquires a restriction level of a transition destination screen that transitions from the screen displayed on the display unit, and the limitation unit is configured to display the transition destination screen. In some cases, the screen data transmission to the other device and the remote operation from the other device may be restricted according to the acquired restriction level of the transition destination screen.

  In addition, the present invention relates to a communication unit that communicates with the second screen sharing device, and a screen displayed on the display unit of the own device, screen sharing with the second screen sharing device, and from the second screen sharing device. Storage means for storing a restriction level for restricting remote operation; screen data transmission means for sending screen data representing a screen displayed on the display unit to the second screen sharing apparatus by the communication means; An acquisition unit that identifies a screen to be displayed on the display unit in response to an instruction sent from the screen sharing apparatus and received by the communication unit, and obtains a restriction level related to the identified screen from the storage unit; and according to the instruction Display control means for displaying a screen on the display section, and screen data to the second screen sharing apparatus according to a restriction level acquired by the acquisition means for the screen displayed on the display section. Restricting means for restricting transmission and remote operation from the second screen sharing apparatus, screen data receiving means for receiving screen data transmitted from the screen data transmitting means, The first screen sharing according to the operation performed by the second display control unit for displaying the screen represented by the screen data received by the screen data receiving unit on the display unit of the own device and the operation unit operated by the user. There is provided a screen sharing system including a second screen sharing device including an instruction transmission unit that transmits an instruction to the device.

  According to the present invention, the first screen sharing device specifies a screen to be displayed on the display unit according to an instruction received from the second screen sharing device, and the screen displayed on the display unit is the same as the two screen sharing device. Acquiring a restriction level relating to the specified screen from a storage means storing a restriction level for restricting remote operation from the screen sharing and the two-screen sharing apparatus, and the first screen sharing apparatus responding to the instruction And displaying the screen on the display unit, and the first screen sharing device, for the screen displayed on the display unit, the screen data to the two-screen sharing device according to the acquired restriction level A step of restricting transmission and remote operation from the two-screen sharing device; and the first screen-sharing device, for the screen displayed on the display unit, of screen data to the two-screen sharing device If the communication is not restricted, transmitting the screen data representing the screen to the second screen sharing device, and receiving the screen data transmitted from the first screen sharing device by the second screen sharing device; The second screen sharing device displaying the screen represented by the received screen data on the display unit of the device itself; and the operation performed by the operation unit operated by the user of the second screen sharing device. And a step of transmitting an instruction to the first screen sharing apparatus according to the method.

  According to another aspect of the present invention, there is provided a communication unit that communicates a computer with another device, a screen data transmission unit that transmits screen data representing a screen displayed on a display unit to the other device, and the other device. A screen to be displayed on the display unit in response to an instruction sent from the communication unit and received from the communication unit, and the screen displayed on the display unit is shared with the other device and remotely operated from the other device. An acquisition means for acquiring a restriction level relating to the specified screen from a storage means storing a restriction level to be restricted, a display control means for displaying a screen on the display unit in response to the instruction, and a display displayed on the display unit The screen functions as a restriction unit that restricts transmission of screen data to the other device and remote operation from the other device according to the restriction level acquired by the acquisition unit. To provide because of the program.

  According to the present invention, screen sharing and remote operation can be restricted regardless of the application.

1 is a diagram illustrating an overall configuration of an image sharing system 1 according to an embodiment of the present invention. The block diagram which showed the hardware constitutions of the terminal device 10. The figure which showed an example of the content of table TB1. The block diagram which showed the structure of the function implement | achieved in the terminal device. The figure for demonstrating operation | movement of embodiment. The figure for demonstrating operation | movement of embodiment. The figure for demonstrating operation | movement of embodiment. The flowchart which showed the flow of the process which the terminal device 10 performs. The flowchart which showed the flow of the process which the terminal device 10 performs. The figure which showed the screen displayed on the display part. The figure which showed the screen displayed on the display part. The figure which showed the screen displayed on the display part. The figure which showed the screen displayed on the display part. The figure which showed an example of the content of table TB2 which concerns on a modification.

[Embodiment]
(overall structure)
FIG. 1 is a diagram illustrating an overall configuration of a screen sharing system 1 according to an embodiment of the present invention. The mobile communication network 20 is a communication network that relays voice communication and data communication in this embodiment. Moreover, terminal device 10A, 10B of this embodiment is a smart phone. The terminal devices 10 and 10B communicate with the radio base station of the mobile communication network 20, and perform voice communication and data communication. Since the terminal device 10A and the terminal device 10B have the same configuration, the alphabet at the end of the reference sign is omitted unless it is necessary to distinguish between them.

(Configuration of terminal device 10)
FIG. 2 is a diagram illustrating a hardware configuration of the terminal device 10. As illustrated in FIG. 2, each unit of the terminal device 10 is connected to the bus 101. Each unit of the terminal device 10 exchanges data between each unit via the bus 101.

  The communication interface 108 functions as an interface that performs wireless communication. The communication interface 108 performs radio communication with a radio base station of the mobile communication network 20 via an antenna (not shown) connected to the communication interface 108 under the control of a CPU (Central Processing Unit) 102, and performs voice communication. Perform communication and data communication. The communication interface 108 outputs the received data to the call unit 109 when receiving data related to voice communication from the radio base station, and outputs the received data to the CPU 102 when receiving data related to data communication. The communication interface 108 transmits data to the radio base station when data related to data communication is input from the CPU 102, and receives data related to voice communication from the call unit 109 when the data related to voice communication is input from the radio base station. Send to the station. The calling unit 109 has a microphone and a speaker (both not shown). When voice is input to the microphone, the call unit 109 outputs data representing the input voice to the communication interface 108. Further, when data related to a voice call is input from the communication interface 108, the call unit 109 converts the data into an analog signal and outputs the analog signal to the speaker, and outputs the sound from the speaker.

  The display unit 107 includes a liquid crystal display as a display device, and displays characters, a graphic screen, a menu screen for operating the terminal device 10, and the like under the control of the CPU 102. The operation unit 106 includes a plurality of keys and a touch screen for operating the terminal device 10. When the user operates a key or touch screen of the operation unit 106, a signal indicating the operated key is output from the operation unit 106 to the CPU 102. When a signal is input from the operation unit 106, the CPU 102 specifies the operated key based on the input signal, and controls each unit according to the operated key.

  A ROM (Read Only Memory) 103 stores a basic program that causes the terminal device 10 to realize the basic functions of the mobile phone. The storage unit 105 includes a nonvolatile memory and can store a plurality of application programs. In the present embodiment, for example, an e-mail program that realizes the function of an e-mail client, a remote operation program that realizes a function of remotely operating another computer, and the like are stored as application programs.

The storage unit 105 also stores a table TB1 that is accessed by the CPU 102 that has executed the remote operation program. The table TB1 is a table that stores screens to be shared and data for restricting remote operations from other terminal devices 10, and is provided for each application program. FIG. 3 is a diagram showing an example of a table TB1 provided for the e-mail program.
In the table TB1, a restriction level is associated with each screen displayed when the e-mail program is executed. The restriction level represents a restriction on each screen. When the restriction level associated with the screen is 1, this screen indicates that display on the other terminal device 10 and remote operation from the other terminal device 10 are permitted. When the restriction level associated with the screen is 2, this screen is permitted to be displayed on the other terminal device 10 and remote operation from the other terminal device 10 is disabled. . When the restriction level associated with the screen is 3, this screen indicates that display on another terminal device 10 and remote operation from the other terminal device 10 are disabled.

  A RAM (Random Access Memory) 104 is used as a work area when the CPU 102 executes a program, and temporarily stores data used when the CPU 102 executes the program. The CPU 102 is a control unit that controls each unit of the terminal device 10. When the terminal device 10 is powered on, the CPU 102 reads a basic program from the ROM 103 and executes it. When the CPU 102 executes the basic program, a basic function as a mobile phone is realized, and the terminal device 10 can perform voice communication and data communication.

  Further, when the CPU 102 executes the basic program, the application program can be executed. For example, when the CPU 102 executes the above-described remote operation program, the various functions illustrated in FIG. 4 are realized, and the function of sharing the screen with another terminal device 10 that is executing the same remote operation program, other terminal device A function for remotely operating the terminal, a function for remotely operating the other terminal device 10, and the like are realized.

(Functional configuration of terminal device 10)
FIG. 4 is a block diagram illustrating a configuration of functions realized in the terminal device 10 by executing the determination program.
The communication unit 150 controls the communication interface 108 to communicate with other devices. The screen data transmission unit 151 transmits screen data representing the screen displayed on the display unit 107 to another device by the communication unit 150. The screen data receiving unit 152 receives screen data transmitted from another device. The acquisition unit 153 specifies a screen to be displayed on the display unit 107, and acquires a restriction level related to the specified screen from the table TB1. The first display control unit 154 displays a screen on the display unit 107 in response to a remote operation instruction sent from another device. The second display control unit 155 causes the display unit 107 to display a screen represented by the screen data received by the screen data receiving unit 152. The restriction unit 156 restricts the screen displayed on the display unit 107 and the remote operation from another device according to the protection level acquired by the acquisition unit 153. The instruction transmission unit 157 transmits an instruction related to the remote operation to another device by the communication unit 150.

(Operation of the embodiment)
Next, operation | movement of the terminal device 10 which concerns on this embodiment is demonstrated. In the following description, the operation will be described on the assumption that the terminal device 10A accesses the terminal device 10A with the terminal device 10A serving as the host and the terminal device 10B serving as the guest.

(Operation when terminal device 10B is connected to terminal device 10A)
In the terminal devices 10A and 10B, when the remote operation program is executed, each function shown in FIG. 4 is realized. When the terminal device 10B accesses the terminal device 10A while the remote operation program is being executed, the user of the terminal device 10B operates the terminal device 10B to connect the terminal device 10B and the terminal device 10A. Specifically, when the user of the terminal device 10B performs an operation for instructing display of the connection destination list on the terminal device 10B, a list of preset connection destinations is displayed on the terminal device 10B (FIG. 5: step). S101). When the user selects the terminal device 10A as a connection destination from the displayed list (step S102), a connection request message for requesting connection to the terminal device 10A is transmitted from the terminal device 10B to the terminal via the mobile communication network 20. It is transmitted to the device 10A (step S103).

  When the terminal device 10A receives the connection request message, the terminal device 10A displays a selection screen for allowing the user to select permission / non-permission of the connection of the terminal device 10B (step S104). Here, when the user of the terminal device 10A performs an operation for permitting the connection, the connection between the terminal device 10A and the terminal device 10B is established (step S105). When the connection between the terminal device 10A and the terminal device 10B is established, the terminal device 10A and the terminal device 10B can exchange data with each other, and screen data indicating a screen displayed on the terminal device 10A is displayed on the terminal device 10A. To the terminal device 10B (step S106). When the screen data is received by the terminal device 10B, the terminal device 10B displays the screen represented by the received screen data (that is, the screen displayed on the terminal device 10A) (step S107).

(Operation when performing remote operation)
Next, when the user of the terminal device 10B performs an operation of touching the icon of the e-mail program on the host-side screen displayed on the terminal device 10B (FIG. 6: step S201), the terminal device 10B performs this operation. Is transmitted to the terminal device 10A (step S202). When this data is received by the terminal device 10A, the terminal device 10A executes an e-mail program according to the received data (step S203). When the terminal device 10A executes the e-mail program, it displays a screen A (FIG. 10) that is a menu screen of the e-mail client (step S204).

  Here, the terminal device 10A refers to the table TB1 and obtains a restriction level for the screen A to be displayed (step S205). Specifically, the terminal device 10A specifies the table TB1 corresponding to the operated e-mail program (FIG. 8: step SA1). When the terminal device 10A specifies the table TB1, the terminal device 10A acquires the restriction level associated with the displayed screen A from the table TB1 (step SA2). Here, in the table TB1, 1 is associated with the restriction level for the screen A (restriction level = 1 in step SA3). The restriction level having a value of “1” permits sharing of a screen to be displayed and remote operation from another terminal device. Therefore, the terminal device 10A transmits screen data indicating the screen A to the terminal device 10B (Step SA7, Step S206). When this screen data is received by the terminal device 10B, the terminal device 10B displays the screen A represented by the transmitted screen data on the display unit 107 (step S207).

  When the screen A of FIG. 10 is displayed on the terminal device 10B, when the user of the terminal device 10B performs an operation of touching the item “Mail setting” (step S208), the terminal device 10B displays data representing this operation. Is transmitted to the terminal device 10A (step S209). When this data is received by the terminal device 10A, the terminal device 10A determines the restriction level of the screen being displayed (FIG. 9: step SB1). Here, the terminal device 10A displays the mail setting screen B (FIG. 11) according to the received data because the restriction level is 1 and the remote operation is possible on the displayed screen A (step 11). S210, step SB2).

  When displaying the screen B, the terminal device 10A specifies the table TB1 (step SA1), and acquires the restriction level for the screen B to be displayed (step S211 and step SA2). Here, in the table TB1, 2 is associated as the restriction level for the screen B (restriction level = 2 in step SA3). The restriction level having a value of “2” allows sharing of the screen to be displayed and disables remote operation. Since the terminal device 10A can share the screen B, the terminal device 10A transmits screen data indicating the screen B to the terminal device 10B (steps S212 and SA7). When this screen data is received by the terminal device 10B, the terminal device 10B displays the screen B represented by the transmitted screen data (step S213).

  When the screen B of FIG. 11 is displayed on the terminal device 10B, when the user of the terminal device 10B performs an operation touching the item “General Mail Settings” (step S214), the terminal device 10B performs this operation. The representing data is transmitted to the terminal device 10A (step S215). When this data is received by the terminal device 10A, the terminal device 10A receives the limit level 2 on the screen B being displayed and cannot be remotely operated (limit level = 2 in step SB1). The received data is discarded, the remote operation is not accepted, and the displayed screen is not changed (steps S216 and SB3).

Next, an operation when an operation of touching the “received mail” item is performed while the screen A of FIG. 10 is displayed will be described.
When screen A in FIG. 10 is displayed on terminal device 10B, when the user of terminal device 10B performs an operation of touching the item “received mail” (FIG. 7: step S301), terminal device 10B performs this operation. Is transmitted to the terminal device 10A (step S302). When this data is received by the terminal device 10A, the terminal device 10A determines the restriction level of the screen being displayed (step SB1). Here, since the restriction level is 1 and the remote operation is possible in the displayed screen A, the terminal device 10A displays the received mail screen C (FIG. 12) according to the received data (step 12). S303, Step SB2).

  When the terminal device 10A displays the screen C, the terminal device 10A specifies the table TB1 (step SA1), and acquires the restriction level for the screen C to be displayed (step S304, step SA2). Here, in the table TB1, 3 is associated with the restriction level for the screen C (restriction level = 3 in step SA3). The restriction level having a value of “3” disables screen sharing and remote operation to be displayed. Since the screen sharing and the remote operation are disabled, the terminal device 10A transmits screen data representing the screen (FIG. 13) for notifying that the screen sharing and the operation are not possible to the terminal device 10A (Step S10). S305, Step SA8). When this screen data is received by the terminal device 10B, the terminal device 10B displays a screen represented by the transmitted screen data (step S306). Since the screen shown in FIG. 13 is displayed on the terminal device 10B, the user of the terminal device 10B can know that the screen displayed on the terminal device 10A cannot be shared and remotely controlled.

  Next, in the terminal device 10A on which the screen of FIG. 12 is displayed, when the user of the terminal device 10A performs an operation to instruct the display of the screen B of FIG. 11, the terminal device 10A displays the screen B for mail setting. It is displayed (step S307).

  When displaying the screen B, the terminal device 10A specifies the table TB1 (step SA1), and acquires the restriction level for the screen B to be displayed (step S308, step SA2). Here, in the table TB1, 2 is associated as the restriction level for the screen B (restriction level = 2 in step SA3). The restriction level having a value of “2” allows sharing of the screen to be displayed and disables remote operation. Since the terminal device 10A can share the screen B, the terminal device 10A transmits screen data indicating the screen B to the terminal device 10B (step S309, step SA7). When this screen data is received by the terminal device 10B, the terminal device 10B displays the screen B represented by the transmitted screen data (step S310). As described above, in this embodiment, when the restriction level of the displayed screen is changed by the operation on the host side, the screen displayed on the guest side is also changed according to the change of the restriction level. It will be.

  In the above description, the e-mail client has been described as an example. However, for other application programs, the table TB1 is stored for each application program. Thereby, screen sharing and remote operation can be restricted for each screen of each application program.

  As described above, according to the present embodiment, screen sharing and remote operation are not restricted collectively by an application, but screen sharing and remote operation are restricted for each screen. It is possible to perform remote operation by sharing the screen without showing it to the side.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the above-described embodiment may be modified as follows to implement the present invention, or may be implemented in combination with each modification.

In the embodiment described above, the terminal device 10 is a smartphone. However, the terminal device 10 may be a PDA (Personal Digital Assistant), a mobile phone, a personal computer, or the like having a function of performing communication via the mobile communication network 20. Good.
In the present invention, the communication line used when the terminal device 10 performs communication is not limited to the mobile communication network 20 as long as it is a communication line capable of data communication. Area Network), wireless LAN, WAN (Wide Area Network), etc. may be used.

  In the embodiment described above, the restriction level is set for each screen displayed by the application program. However, the restriction level may be set for each application program. In this configuration, each screen displayed by the application program being executed is limited in screen sharing and remote operation according to the restriction level set in the application program. For example, when the restriction level of “2” is set for the e-mail program, the terminal device 10 sets the restriction level to “2” for all screens displayed by the e-mail program. In this case, although the screen sharing is possible between the terminal device 10A and the terminal device 10B, the remote operation is not possible.

  In the above-described embodiment, screen sharing and remote operation are restricted according to the restriction level stored in the table TB1, but screen sharing and remote operation are possible for screens not stored in the table TB1. Conversely, for screens not stored in the table TB1, screen sharing and operation may be disabled.

  In the above-described embodiment, screen data representing the screen displayed on the terminal device 10B on the guest side is transmitted to the terminal device 10A on the host side, and the screen on the guest side is displayed on the terminal device 10A and displayed on the terminal device 10B. The displayed screen may also be shared. When the guest side screen is shared, the host side may be disabled from remote operation via the displayed guest side screen, and only the host side program may be operated on the host side. In this configuration, the CPU 102 that executes the program in the ROM 103 implements a remote operation restriction unit that disables remote operation of the guest terminal.

  In the present embodiment, the terminal device 10 may change the restriction level according to the state of the own device. In this configuration, the CPU 102 that has executed the program of the ROM 103 implements a restriction level changing unit that changes the restriction level, and the CPU 102 of the terminal device 10 uses the table TB2 in FIG. 14 instead of the table TB1. In the table TB2, a sub-field “normal” and a sub-field “low remaining amount” are provided in the restriction level field. In the above-described embodiment, when the terminal device 10 is driven by a secondary battery and the remaining amount of the secondary battery exceeds a predetermined threshold, the acquisition unit 153 sets the “normal” subfield. Get the stored limit level. On the other hand, when the remaining amount of the secondary battery is equal to or less than a predetermined threshold, the restriction level changing unit controls the obtaining unit 153 to acquire the restriction level stored in the “low remaining amount” subfield. The limit level is changed from the state in which the level of the secondary battery exceeds the threshold value. In the “low remaining amount” subfield, the restriction level “2” or “3” is stored, and the restriction level “1” is not stored. This is to prevent remote operation of the battery when the remaining battery level is low, thereby increasing power consumption and allowing the terminal device 10 to be used for a longer time. In this modification, when the table TB1 is used, the remaining amount of the secondary battery is equal to or less than a predetermined threshold value, and the limit level acquired from the table TB1 is “1”, the limit level changing unit sets the limit. The level may be changed to “2” or “3”.

  In addition, in the structure which changes a restriction | limiting level according to the state of the terminal device 10, the state of a terminal device is not limited to the remaining amount of a secondary battery. The terminal device 10 may be provided with a function for positioning a position using GPS (Global Positioning System), and the restriction level changing unit may change the restriction level in accordance with the measured position. For example, when an application program that displays the position of the terminal device 10 on a map is executed and the screen of this application program is shared, the user's position of the terminal device 10 can be known on the guest side. In this case, the restriction level changing unit may change the restriction level set for the screen so that the screen cannot be shared when the user is in a preset position or region. According to this configuration, it is possible to prevent the guest side from knowing the position on the host side.

Moreover, when changing a restriction | limiting level according to the state of the terminal device 10, you may change a restriction | limiting level according to whether the user of the host side hold | maintains the terminal device 10, for example. Specifically, a contact sensor that detects that the user is touching the terminal device 10 is provided in the terminal device 10, and the user is not touching the terminal device 10 (that is, the user is not holding the terminal device 10. When the state is detected by the contact sensor, the restriction level may be changed to “3”.
Further, an imaging element may be provided in the terminal device 10 and the restriction level may be changed according to an image obtained by the imaging element. Specifically, the restriction level may be changed to “3” in a state where an image of a human face is not obtained by the image sensor.
According to these configurations, it is possible to prevent a user on the host side from being remotely operated from the guest side while being away from the terminal device 10.

In the embodiment described above, the restriction level is stored in the table TB1, but the restriction level in the table TB1 may be changed by the user. In this configuration, the CPU 102 that executes the program in the ROM 103 implements a restriction level rewriting unit that rewrites the restriction level of the table TB1 in accordance with an operation performed on the operation unit 106 by the user. Further, when the restriction level is changed by a user operation, screen sharing and remote operation may be restricted for the displayed screen according to the restriction level after the change.
Further, in the above-described embodiment, screen sharing and remote operation are restricted according to the restriction level stored in the table TB1, but for example, the user can perform screen sharing and remote operation on the operation unit 106. When the operation for forcibly stopping is performed, sharing of all screens displayed on the terminal device 10 on the host side and remote operation may be forcibly stopped regardless of the restriction level of the table TB1. In this configuration, the CPU 102 that executes the program in the ROM 103 implements a stop unit that forcibly stops screen sharing and remote operation in accordance with an operation performed by the user on the operation unit 106.

In the embodiment described above, when the transition from one screen to the next screen is limited in the terminal device 10A on the host side, the terminal device 10A obtains the screen restriction level by prefetching from the table TB1. In addition, when data representing an operation for moving to the next screen is received, screen sharing and remote operation may be restricted according to the pre-read restriction level.
For example, when the transition destination from the screen E is only the screen F, when the terminal E is displayed, the terminal device 10A prefetches and holds the restriction level of the screen F. In addition, regarding the screen F, sharing and remote operation are disabled. Then, when data representing an operation for transitioning to the screen F is transmitted from the terminal device 10B to the terminal device 10A, the terminal device 10A cannot share and operate the screen according to the pre-read restriction level. Is transmitted to the terminal device 10A. Here, the terminal device 10 </ b> A may discard the data representing the received operation so that the screen F is not changed.

In the above-described embodiment, the table TB1 is provided for each application program. However, for one application program, the table TB1 is provided for each terminal on the guest side, and the stored restriction level is made different for each table. It may be.
For example, when the terminal device 10A functions as a host and the terminal device 10B and the terminal device 10C access the terminal device 10A as a guest, the terminal device 10A corresponds to an identifier that uniquely identifies the terminal device 10B and the terminal device 10B. A set of tables TB1 is stored, and an identifier for uniquely identifying the terminal device 10C and a set of tables TB1 corresponding to the terminal device 10C are stored. When the terminal devices 10B and 10C serving as guests access the terminal device 10A serving as a host, they transmit their own identifiers together with various data to the terminal device 10A serving as a host. When displaying the screen according to the received data, the terminal device 10A specifies the table TB1 paired with the identifier received together, and acquires the restriction level from the specified table TB1.

For example, when an operation for instructing display of the screen A is performed on the terminal device 10B, data representing the operation performed on the terminal device 10B and an identifier of the terminal device 10B are sent to the terminal device 10A. The terminal device 10A specifies the table TB1 paired with the sent identifier. Next, the terminal device 10A refers to the identified table TB1 and acquires the restriction level for the screen A to be displayed. Here, when the restriction level associated with the screen A in the identified table TB1 is “1”, the CPU 102 acquires “1” as the restriction level, and allows the terminal device 10B to share the screen and remotely. Allow operation.
For example, when an operation for instructing the display of the screen A is performed on the terminal device 10C, data representing the operation performed on the terminal device 10C and an identifier of the terminal device 10C are sent to the terminal device 10A. The terminal device 10A specifies the table TB1 paired with the sent identifier. Next, the terminal device 10A refers to the identified table TB1 and acquires the restriction level for the screen A to be displayed. Here, when the restriction level associated with the screen A in the identified table TB1 is “3”, the CPU 102 acquires “3” as the restriction level and disables screen sharing and remote operation.
According to this configuration, screen sharing and remote operation can be restricted for each connection partner even for the same application program.

  Each of the above-described programs includes a magnetic recording medium (magnetic tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk), etc.)), optical recording medium (optical disk (CD (Compact Disc), DVD (Digital Versatile Disk)). Or the like), and may be provided in a state of being stored in a computer-readable recording medium such as a magneto-optical recording medium or a semiconductor memory and installed in each device. Further, it may be downloaded and installed in each device via a communication line.

DESCRIPTION OF SYMBOLS 1 ... Communication system 10, 10A, 10B ... Terminal device, 20 ... Mobile communication network, 101 ... Bus, 102 ... CPU, 103 ... ROM, 104 ... RAM, 105 ... Memory | storage part, 106 ... Operation part, 107 ... Display 108, communication interface, 109, communication unit, 150 ... communication unit, 151 ... screen data transmission unit, 152 ... screen data reception unit, 153 ... acquisition unit, 154 ... first display control unit, 155 ... second display control Unit, 156... Restriction unit, 157.

Claims (9)

Communication means for communicating with other devices;
Storage means for storing a restriction level for restricting screen sharing with the other device and remote operation from the other device for the screen displayed on the display unit;
Screen data transmitting means for transmitting screen data representing the screen displayed on the display unit to the other device by the communication means;
An acquisition means for specifying a screen to be displayed on the display unit in response to an instruction sent from the other device and received by the communication means, and acquiring a restriction level related to the specified screen from the storage means;
Display control means for displaying a screen on the display unit in response to the instruction;
Restriction means for restricting transmission of screen data to the other device and remote operation from the other device according to the restriction level obtained by the obtaining means for the screen displayed on the display unit;
A screen sharing apparatus comprising: The screen sharing apparatus according to claim 1, further comprising restriction level changing means for changing the restriction level according to a state of the own apparatus. Operation means operated by the user;
Restriction level rewriting means for rewriting the restriction level in accordance with an operation performed by the operation means;
The screen sharing apparatus according to claim 1, further comprising: Operation means operated by the user;
Stop means for stopping screen sharing with the other device and remote operation from the other device according to the operation performed by the operation means;
The screen sharing apparatus according to claim 1, further comprising: Remote operation restriction means for disabling remote operation to the other device;
The display control unit is data received by the communication unit, and causes the display unit to display the screen based on screen data representing a screen displayed on the other device;
The screen sharing apparatus according to claim 1, wherein: The acquisition means includes
Obtain the restriction level of the transition destination screen that transitions from the screen displayed on the display unit,
The limiting means is
When the instruction is an instruction to display the transition destination screen, transmission of screen data to the other device and remote operation from the other device are restricted according to the acquired restriction level of the transition destination screen. The screen sharing apparatus according to claim 1, wherein: Communication means for communicating with the second screen sharing device;
Storage means for storing a restriction level for restricting screen sharing with the second screen sharing device and remote operation from the second screen sharing device with respect to the screen displayed on the display unit of the device itself;
Screen data transmitting means for transmitting screen data representing the screen displayed on the display unit to the second screen sharing device by the communication means;
An acquisition means for specifying a screen to be displayed on the display unit in response to an instruction sent from the second screen sharing apparatus and received by the communication means, and acquiring a restriction level related to the specified screen from the storage means;
Display control means for displaying a screen on the display unit in response to the instruction;
Restriction for restricting transmission of screen data to the second screen sharing device and remote operation from the second screen sharing device according to the restriction level obtained by the obtaining means for the screen displayed on the display unit Means,
A first screen sharing device comprising:
Screen data receiving means for receiving screen data transmitted from the screen data transmitting means;
Second display control means for displaying the screen represented by the screen data received by the screen data receiving means on the display unit of the device itself;
An instruction transmitting means for transmitting an instruction to the first screen sharing apparatus in response to an operation performed by an operation unit operated by a user;
A second screen sharing device comprising:
A screen sharing system. The first screen sharing device specifies a screen to be displayed on the display unit according to the instruction received from the second screen sharing device, and the screen displayed on the display unit is shared with the two screen sharing device and the 2 Obtaining a restriction level relating to the identified screen from a storage means storing a restriction level for restricting remote operation from the screen sharing device;
The first screen sharing device displaying a screen on the display unit in response to the instruction;
The first screen sharing device performs screen data transmission to the two-screen sharing device and remote control from the two-screen sharing device according to the acquired restriction level for the screen displayed on the display unit. A limiting step;
When the first screen sharing device does not restrict the transmission of screen data to the two-screen sharing device for the screen displayed on the display unit, the screen data representing the screen is transmitted to the second screen sharing device. Steps,
The second screen sharing device receiving screen data transmitted from the first screen sharing device;
The second screen sharing device displaying a screen represented by the received screen data on a display unit of the device;
The second screen sharing device transmitting an instruction to the first screen sharing device in response to an operation performed by an operation unit operated by a user;
A screen sharing method comprising: Computer
Communication means for communicating with other devices;
Screen data transmitting means for transmitting screen data representing the screen displayed on the display unit to the other device by the communication means;
A screen to be displayed on the display unit is specified according to an instruction sent from the other device and received by the communication unit, and the screen displayed on the display unit is shared with the other device and from the other device An acquisition means for acquiring a restriction level relating to the identified screen from a storage means storing a restriction level for restricting remote operation;
Display control means for displaying a screen on the display unit in response to the instruction;
The screen displayed on the display unit is made to function as a restriction unit that restricts transmission of screen data to the other device and remote operation from the other device according to the restriction level obtained by the obtaining unit. program.

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