JP2013137669A - Screen sharing device and screen sharing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect information on a home screen according to screen sharing partners.SOLUTION: A terminal device to be a screen sharing host terminal stores a setting information table 161 containing setting information, for each screen sharing partner, that defines the limitations on the display of object images such as icon images and background images or the limitations on a remote control operation when screen sharing is performed as to the home screen on which object images corresponding to programs to be executed by an own device are arranged. When the terminal device to be the host terminal specifies an external device to be a screen sharing partner, the terminal device refers to the setting information table 161 and sets the screen sharing so as to limit the display of the object images or the remote control operation from the external device according to the setting information corresponding to the specified external device. The terminal device to be the host terminal performs screen sharing with a guest terminal by sharing the home screen having the limited display of the object images and limiting the remote control operation after setting the screen sharing.

Description

  The present invention relates to a technique for sharing a screen among a plurality of devices.

  There is a technique for operating a remote computer by sharing a screen displayed by the computer. According to this screen sharing technique, the screen of the host-side terminal device (hereinafter referred to as “host terminal”) is displayed on the guest-side terminal device (hereinafter referred to as “guest terminal”) via the network. A user of the host terminal (hereinafter referred to as “host user”) teaches the guest terminal user (hereinafter referred to as “guest user”) how to set and operate the application program, or the guest terminal remotely operates the host terminal. You can do it.

  By the way, when a home screen corresponding to a so-called stand-by screen or lock screen is displayed on the guest terminal by screen sharing, the guest can determine what application program is installed on the host terminal from the icon image placed on the home screen. The personal information of the host user may be known to the guest user from the background image (also referred to as wallpaper) set by the host user or set by the host user. In addition, there is a possibility that application programs and background image settings may be changed without the host user knowing remotely by operating the host terminal remotely. As described above, since information held by the host terminal may be aggregated on the home screen, it is desirable to protect the information when the screen is shared. Patent Document 1 recognizes the information displayed on the screen before transferring the screen display information in order to hide the information related to the confidential information and personal information on the screen to be shared, and determines that transmission is impossible. Disclosed information is not transmitted. For example, Patent Document 1 discloses that icon information displayed in a desktop environment is extracted, and when the extracted icon information is a non-public icon, rendering processing is performed on the non-public icon to make it invisible. ing.

JP 2011-60000 A

For the purpose of protecting the information related to the home screen, when the display and remote operation in screen sharing are uniformly restricted, the above-mentioned problems may occur due to insufficient restrictions depending on the screen sharing partner. . On the other hand, depending on the screen sharing partner, the limit is excessive, which may cause inconvenience to the host user and guest user when screen sharing is performed.
Accordingly, an object of the present invention is to protect information related to a home screen according to a screen sharing partner.

  In order to solve the above problems, the screen sharing apparatus of the present invention is capable of screen sharing with an external apparatus for a communication unit that communicates with the external apparatus and a home screen on which an object image corresponding to a program executed by the self apparatus is arranged. A storage unit that stores the setting information that defines the limitation on the display of the object image on the display unit that displays the image or the limitation on the remote operation when the screen sharing is performed, and the screen sharing partner The specifying unit for specifying the external device to be used, and the display of the object image or the remote operation from the external device are limited according to the setting information stored in the storage unit corresponding to the external device specified by the specifying unit The setting unit for setting the screen sharing, and after the setting of the screen sharing by the setting unit, the screen information indicating the home screen is addressed to the external device specified by the specifying unit. Characterized in that it comprises a transmission control unit for transmitting by the communication unit.

  In the present invention, when the external device to be the screen sharing partner is specified by the specifying unit, the home screen displayed on the display unit in the previous screen sharing with the external device and the current home screen, A difference detection unit that detects a difference in display of the object image or a difference in information about the program, and a notification unit that notifies the user of the device of the difference detected by the difference detection unit, The unit may set the screen sharing in accordance with a response from the user to the notification of the difference by the notification unit.

In the present invention, when the user of the device itself is instructed to display the original home screen that does not restrict the display of the object image on the display unit when the screen sharing is performed, the original home A first inquiry unit that inquires of the user whether or not to display a screen; and the setting unit sets whether or not to display the original home screen according to a response from the user to the inquiry by the first inquiry unit. You may make it perform.
When the screen sharing is performed in the present invention, when the user of the device itself is instructed to display the original home screen that does not restrict the display of the object image on the display unit, the screen sharing is continued. A second inquiry unit that inquires of the user whether the screen sharing is possible or not, and the setting unit sets whether to continue the screen sharing according to a response from the user to the inquiry by the second inquiry unit. Good.

  In the present invention, the storage unit is a remote operation related to a home application program executed to display the home screen on the display unit, a remote operation related to an application program other than the home application program executed by the own device, or a background. You may make it memorize | store the said setting information which determined the propriety of the remote operation regarding the said object image corresponded to an image.

In the present invention, the setting unit may prevent the setting information from being referred to when the communication unit accepts access to the storage unit from the identified external device while the screen sharing is being performed. May be.
In this aspect, when the setting unit accepts access to the storage unit from a predetermined information processing device, the setting unit permits the information processing device to refer to the setting information. Item 7. The screen sharing apparatus according to Item 6.

  In the present invention, the storage unit stores screen information indicating the home screen displayed on the display unit in the previous screen sharing for each screen sharing share partner, and the transmission control unit stores the screen sharing. Before the screen information after the setting of the screen sharing by the setting unit is transmitted, the screen information stored in the storage unit corresponding to the external device specified by the specifying unit, You may make it make it transmit to the said external device by the said communication part.

  In the present invention, when any one of the plurality of home screens is selectively displayed on the display unit, the storage unit stores the individual setting information for each home screen, and the setting unit You may make it perform the setting of the said screen sharing according to the setting information memorize | stored in the said memory | storage part corresponding to the home screen displayed on a display part.

  In the present invention, the setting unit may restrict display or remote operation of an image on the display unit related to a function linked to the program according to the setting information.

  In the present invention, the setting unit may make the object image for which display restriction is determined by the setting information invisible without changing a layout of the home screen.

  According to the screen sharing method of the present invention, a specific step of specifying an external device that is a screen sharing partner and an image when screen sharing with the external device is performed on a home screen on which an object image corresponding to the program is arranged In the external device specified in the specifying step, with reference to the storage unit that stores the setting information that defines the limitation of the display of the object image on the display unit that displays or the limitation of the remote operation for each screen sharing partner The acquisition step of acquiring the setting information stored correspondingly, and according to the setting information acquired in the acquisition step, display of the object image or remote control from the specified external device is limited. A setting step for performing setting, and after setting screen sharing in the setting step, the home screen is sent to the specified external device. And a sending step of sending screen information indicating.

  ADVANTAGE OF THE INVENTION According to this invention, the information regarding a home screen can be protected according to the other party of screen sharing.

The block diagram which shows the structure of the screen sharing system of this invention. The block diagram which shows the hardware constitutions of a terminal device. It is a figure which shows a home screen. The figure which shows the structure of a setting information table. The functional block diagram which shows the functional structure of the control part of a terminal device. The sequence chart which shows the flow of the whole process of a screen sharing system. The flowchart which shows the flow of a screen sharing start process. The figure which shows the home screen at the time of screen sharing. The figure which shows the home screen at the time of screen sharing. The figure which shows the home screen at the time of screen sharing. The flowchart which shows the process which a terminal device performs at the time of screen sharing. The figure which shows the inquiry screen at the time of screen sharing. The figure which shows the structure of a share history table. The functional block diagram which shows the functional structure of the control part of a terminal device. The flowchart which shows the flow of a screen sharing start process. The figure which shows the notification screen of the difference of a home screen. The flowchart which shows the flow of the process which a terminal device performs at the time of screen sharing The figure which shows the structure of an access management table. The flowchart which shows the flow of the process which a terminal device performs at the time of screen sharing. The figure which shows the structure of a cache management table. The flowchart which shows the flow of a screen sharing start process. The figure which shows the structure of a setting information table. The figure which shows the structure of a user management table. The figure which shows the structure of a setting information table. The figure which shows the structure of a user management table. The figure which shows a home screen. The figure which shows the home screen at the time of screen sharing. The figure which shows the home screen at the time of screen sharing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a diagram showing the overall configuration of the screen sharing system 1.
The screen sharing system 1 includes terminal devices 10A, 10B, 10C, and 10D and a server device 20. The terminal devices 10A, 10B, 10C, and 10D are smartphones here, but may be other terminal devices such as a mobile phone terminal, a tablet terminal, a personal computer, and a PDA (Personal Digital Assistant). The server device 20 is a server device that mediates information exchanged between the host terminal and the guest terminal when screen sharing is started. The server device 20 stores in a database the IP addresses assigned to the terminal devices 10A, 10B, 10C, and 10D that can be host terminals or guest terminals. The terminal devices 10A, 10B, 10C, 10D and the server device 20 are connected to the network NW. Here, the network NW is a communication network including a mobile communication network, a gateway, and the Internet.
Since the terminal devices 10A, 10B, 10C, and 10D have the same configuration, hereinafter, they are collectively referred to as “terminal device 10” unless it is particularly necessary to distinguish them. Further, the number of terminal devices 10 included in the screen sharing system 1 may be any number. In this embodiment, when screen sharing is performed, the terminal device 10A is a host terminal and the terminal devices 10B, 10C, or 10D are guest terminals unless otherwise specified.

FIG. 2 is a block diagram illustrating a hardware configuration of the terminal device 10. As illustrated in FIG. 2, the terminal device 10 includes a control unit 11, a voice input / output unit 12, a communication unit 13, an operation unit 14, a display unit 15, and a storage unit 16. The “shared history table 162” illustrated in FIG. 2 may be stored in the storage unit 16 in the second embodiment to be described later, and may not be stored in the present embodiment.
The control unit 11 includes a microprocessor having a central processing unit (CPU), a read only memory (ROM), and a random access memory (RAM). The CPU controls each unit of the terminal device 10 by reading the data stored in the ROM or the storage unit 16 into the RAM and executing the data. The voice input / output unit 12 includes a microphone and a speaker, and realizes functions related to voice input / output. The communication unit 13 includes a wireless communication circuit and an antenna, and is an interface that communicates with an external device by connecting to the network NW. The operation unit 14 includes a touch screen 141 and physical keys 142 and accepts an operation of a user of the terminal device 10. The touch screen 141 is provided so as to overlap the display surface of the display unit 15 and accepts, for example, a user operation on a soft button displayed on the display surface. The physical key 142 has a plurality of operation keys for accepting user operations, for example, an operation key for returning the display of the display unit 15 to the home screen.

The display unit 15 has a display surface for displaying an image, and displays various screens on the display surface. The storage unit 16 includes a storage device such as an EEPROM (Electronically Erasable and Programmable ROM) or a flash memory. The storage unit 16 includes a home application program (hereinafter, abbreviated as “home application”) executed to display the home screen, other application programs executed by the control unit 11, and icons arranged on the home screen. Image data indicating an image such as an image or a background image is stored.
Here, the home screen displayed by the terminal device 10 will be described.

FIG. 3 is a diagram illustrating a home screen displayed by the terminal device 10A. The terminal device 10A selectively displays the home screen SC1 shown in FIG. 3A or the home screen SC2 shown in FIG. For example, when the control unit 11 of the terminal device 10A receives a user's flick operation (an operation of sliding a finger on the display surface) on the touch screen 141, the control unit 11 changes the home screen displayed on the display unit 15.
Home screens SC <b> 1 and SC <b> 2 are initial screens that are initially displayed when the terminal device 10 is turned on and the startup is completed. The home screens SC1 and SC2 are screens on which object images corresponding to programs installed in the terminal device 10A (that is, stored in the storage unit 16) are arranged. For example, the icon images I1 to I12 are object images that are symbols of application programs installed in the terminal device 10A. When the user operates the operation unit 14 to select any icon image, the control unit 11 activates (that is, newly executes) an application program corresponding to the selected icon image. Then, the control unit 11 causes the display unit 15 to display a screen corresponding to the executed application program. However, the application program installed in the terminal device 10 </ b> A is not limited to the one accompanied with the screen display, and may be the one not accompanied with the screen display.

The home screens SC1 and SC2 are screens on which the background image BG1 is arranged as an object image other than the icon image. As shown in FIGS. 3A and 3B, a background image BG1 meaning a map of Japan is arranged on the home screens SC1 and SC2. Here, the background images are common to the home screens SC1 and SC2, but different background images may be used. The home screen SC2 is a screen on which a window W corresponding to a widget used for information search is arranged as another object image. That is, the object image may be an image arranged on the home screen when the home screen is displayed on the display unit 15 such as an icon image, a background image, or a window.
The home application described above may be used not only for displaying the home screen but also for performing basic settings related to the operation of the terminal device 10, but the description thereof is omitted.
The storage unit 16 further stores a setting information table 161.

FIG. 4 is a diagram illustrating a configuration of the setting information table 161 stored in the terminal device 10A. As shown in FIG. 4, the setting information table 161 is a data table in which “application program”, “object image”, “link function”, “display position”, and “guest terminal” are associated with each other. It is.
The “application program” field stores information indicating an application program installed in the terminal device 10A. In FIG. 4, the “setting application” corresponds to an application program for performing settings relating to the operation of the terminal device 10 such as settings relating to wireless communication (for example, connection destination settings) by the communication unit 13. “Gallery” corresponds to an application program for displaying an image such as a photograph or a video stored in the storage unit 16. “SNS” corresponds to an application program for using SNS (Social Networking Service). The “game application” corresponds to an application program for executing a computer game. The “pre-in application” corresponds to an application program installed (pre-installed) in advance in the terminal device 10A. The “search application” corresponds to an application program for searching for information using a search engine. The “phone book application” corresponds to an application program for using the phone book function.
Of the application programs shown in FIG. 4, application programs corresponding to “setting application”, “gallery”, “search application”, and “phone book application” are also preinstalled in the terminal device 10A (so-called pre-in application). ). On the other hand, the application program corresponding to “SNS” or “game application” is a program (so-called add-in application) installed by the user of the terminal device 10A.

In FIG. 4, the “object image” field is an image arranged on the home screen as described above, and stores information indicating an image corresponding to an application program executed by the terminal device 10. Here, the object image corresponding to the home application is a background image, and more specifically, the background image BG1 shown in FIG. Object images corresponding to other application programs are icon images I1 to I12. The “linked function” field is a field that stores information indicating a function realized in cooperation with the application program. The cooperation function is, for example, a widget or a notification function. By realizing the widget as the linkage function, a window corresponding to the application program is arranged on the home screen. As shown in FIG. 3B, the window W is arranged on the home screen SC2 by the linkage function related to the search application. Further, by realizing the notification function as the linkage function, a notification regarding the application program (for example, notification of update information of the application program) is arranged on the home screen by a so-called status bar or pop-up screen.
The control unit 11 refers to, for example, a manifest file of the application program, identifies the presence / absence of the linkage function of the application program and the type of linkage function, and writes information related to the linkage function in the setting information table 161.

The “display position” field stores information indicating the position where the object image is arranged on the home screen. Here, the display position includes a home screen on which the object image is arranged and position information indicating the position of the object image on the display unit 15. “SC1” shown in FIG. 4 means the home screen SC1, and “SC2” means the home screen SC2. “Pos1” to “pos12” are position information indicating the position of the object image on the display unit 15.
Here, the position of the object image on the home screen is determined by the user designation, but may be determined by the control unit 11 based on the execution frequency of the application program or the name of the application program.

  The “guest terminal” field is a field in which information indicating a screen sharing partner (that is, a guest terminal) performed by the terminal device 10A as a host terminal is stored. Here, the names (guest user names) of the users of the terminal devices 10B, 10C, and 10D are stored in the guest terminal field. Here, the guest user name of the terminal device 10B is “XX Hanako”, the user name of the terminal device 10C is “ΔΔ Taro”, and the user name of the terminal device 10D is “XX company”. Here, “XX Hanako” is the family of the user (host user) of the terminal device 10A. “ΔΔ Taro” is a friend of the user of the terminal device 10A. “XX Company” is an operator (institution) that teaches a guest user how to set and operate an application program.

  The setting information table 161 having the above configuration stores application program setting information represented by “◯” or “−” for each guest terminal. The setting information is information that defines restrictions on display of object images and restrictions on remote operation when screen sharing is performed for the home screen. When “○” is written in the setting information table 161 in correspondence with a certain application program and guest terminal, the object image display unit 15 (here, the host terminal and Display on both display units 15) of the guest terminal is permitted, and remote operation (for example, execution of application program, setting change uninstallation, etc.) from the guest terminal regarding the application program is permitted. On the other hand, if “−” is written in the setting information table 161 corresponding to a certain application program and guest terminal, the object image corresponding to the application program is not displayed on the display unit 15 in screen sharing. While being permitted, remote operation from the guest terminal regarding the application program is not permitted.

For example, as shown in FIG. 4, there are a large number of application programs that have no display and remote restrictions on guest terminals (XX Hanako and △ △ Taro) of guest users who are close to the host user. There are few unrestricted applications for guest terminals of non-guest users (XX Corporation). In addition, application programs without display and remote restriction may be different even between guest terminals of guest users with high intimacy.
The above setting information table 161 can be freely customized by, for example, user designation of the terminal device 10A.

FIG. 5 is a functional block diagram showing a functional configuration of the control unit 11 of the terminal device 10 serving as a screen sharing host terminal. The control unit 11 implements functions corresponding to the specifying unit 111, the setting unit 112, the display control unit 113, the transmission control unit 114, the first inquiry unit 115, and the second inquiry unit 116.
The identifying unit 111 identifies a guest terminal (external device) that is a screen sharing partner. Here, the identification unit 111 communicates line authentication information by SIM (Subscriber Identity Module), terminal identification information identified from a guest terminal, information that can uniquely identify a guest terminal such as a telephone number, a user ID, and a password. The guest terminal is identified by the information received by the unit 13 and received.

  The setting unit 112 restricts the display of the object image on the display unit 15 and the remote operation from the guest terminal according to the setting information written in the setting information table 161 corresponding to the guest terminal specified by the specifying unit 111. Set screen sharing. In addition to this, the setting unit 112 changes screen sharing settings during screen sharing, and also performs settings related to continuation and termination of screen sharing.

The display control unit 113 generates screen information according to the setting information set by the setting unit 112 and causes the display unit 15 to display the home screen indicated by the generated screen information.
After setting the screen sharing by the setting unit 112, the transmission control unit 114 transmits screen information indicating the home screen to the guest terminal specified by the specifying unit 111 by the communication unit 13. For example, the screen information used for display of the home screen by the display control unit 113 and the screen information transmitted by the transmission control unit 114 are the same screen information.

The first inquiry unit 115 is an original home screen (hereinafter, simply referred to as “original home screen” which does not restrict the display of object images when screen sharing is being performed. For example, the home screens SC1 and SC2 illustrated in FIG. 3). ) Is displayed on the display unit 15, the host user is inquired about whether or not the original home screen can be displayed. The setting unit 112 sets whether or not to display the original home screen according to a response from the host user to the inquiry by the first inquiry unit 115.
When the host user is instructed to display the original home screen on the display unit 15 while screen sharing is being performed, the second inquiry unit 116 inquires of the user whether the screen sharing can be continued. The setting unit 112 sets whether or not screen sharing can be continued according to a response from the host user to the inquiry by the second inquiry unit 116.
Here, the first inquiry unit 115 and the second inquiry unit 116 receive a response from the user through the operation of the operation unit 14 of the host user.
Next, the operation of the screen sharing system 1 will be described.

FIG. 6 is a sequence chart showing the overall processing flow of the screen sharing system 1. In FIG. 6, the processing when the terminal device 10A is a host terminal (corresponding to the screen sharing device of the present invention) and any of the terminal devices 10B, 10C, 10D is a guest terminal (screen sharing partner). The flow is shown. Hereinafter, the flow of this process will be described by taking the case where the terminal device 10B is a guest terminal as an example.
First, the control unit 11 of the terminal device 10B transmits a connection request to the host terminal to the server device 20 by the communication unit 13 when the own device becomes a guest terminal and performs screen sharing (step S1). This connection request includes information that can uniquely identify the host terminal, such as a host user name or a telephone number assigned to the host terminal.
When receiving the connection request from the terminal device 10B, the server device 20 acquires from the database the IP address (host IP) assigned to the host terminal specified by the received connection request (step S2). Here, the server device 20 acquires the host IP of the terminal device 10A from the database.

Next, the server device 20 transmits a guest terminal notification to the terminal device 10A (step S3). The guest terminal notification includes information that can uniquely identify the guest terminal (for example, guest terminal information stored in the setting information table 161). Since the guest terminal is the terminal device 10B here, the server device 20 transmits a guest terminal notification including the guest user name “XX Hanako” to the terminal device 10A. Next, the server device 20 transmits the host IP acquired from the database in step S2 to the terminal device 10B (step S4).
When the communication unit 13 receives the host IP, the control unit 11 of the terminal device 10B specifies the received host IP and transmits a screen sharing start request to the terminal device 10A by the communication unit 13 (step S5).

When the communication unit 13 receives the screen sharing start request from the communication unit 13, the control unit 11 of the terminal device 10A executes a screen sharing start process (step S6). The screen sharing start processing includes, for example, screen sharing setting, processing for determining whether or not the host terminal permits screen sharing start, and the like, which will be described in detail later. When screen sharing is started after the screen sharing start processing, the control unit 11 of the terminal device 10A transmits screen information indicating a screen shared with the guest terminal to the terminal device 10B that is the guest terminal by the communication unit 13 ( Step S7). Thereafter, information necessary for screen sharing is exchanged between the terminal devices 10A and 10B, and screen sharing is performed (step S8).
For example, when the control unit 11 of the terminal device 10A displays the screen indicated by the screen information on the display unit 15 of the own device, the control unit 11 transmits the screen information to the terminal device 10B by the communication unit 13. The control unit 11 of the terminal device 10B displays the screen indicated by the screen information received by the communication unit 13 on the display unit 15 of the own device. The control unit 11 of the terminal device 10B transmits information for performing a remote operation to the terminal device 10A by the communication unit 13. The control unit 11 of the terminal device 10A controls the terminal device 10A according to information for performing a remote operation from the terminal device 10B.
Next, the screen sharing start process will be described in detail.

FIG. 7 is a flowchart showing the flow of the screen sharing start process.
First, the control unit 11 of the terminal device 10A specifies a guest terminal to be a screen sharing partner (step S61). Here, the control part 11 specifies a guest terminal by the guest terminal notification received by the process of step S3. Next, the control unit 11 refers to the setting information table 161 to determine whether or not setting information corresponding to the guest terminal is stored in the setting information table 161 (step S62). When the guest user name specified in the process of step S61 is stored in the guest terminal field of the setting information table 161, the control unit 11 determines “YES” in the process of step S62.

When it is determined “YES” in the process of step S62, the control unit 11 acquires setting information corresponding to the guest terminal specified in the process of step S61 from the setting information table 161 (step S63). Here, the control unit 11 refers to the field corresponding to the specified guest terminal in the setting information table 161 and acquires the setting information of each application program.
Next, the control unit 11 performs screen sharing setting according to the setting information acquired in the process of step S63 (step S64). Here, when it is determined that the display of the object image is restricted by the setting information, the control unit 11 performs setting for generating screen information for displaying the home screen according to the restriction in the screen sharing. . In addition, when the remote operation is restricted by the setting information, the control unit 11 performs setting so that the operation by the remote operation is performed according to the restriction at the time of screen sharing. The control unit 11 performs screen sharing on the home screen shown in FIGS. 8 to 10 according to the terminal devices 10B, 10C, and 10D serving as guest terminals by setting screen sharing in the process of step S64.

  8 to 10 are diagrams showing home screens when screen sharing is performed for home screens SC1 and SC2 in FIG. FIG. 8 is a diagram illustrating a home screen when the terminal device 10B is a guest terminal. FIG. 9 is a diagram illustrating a home screen when the terminal device 10 </ b> C is a guest terminal. FIG. 10 is a diagram illustrating a home screen when the terminal device 10D is a guest terminal. 8 to 10, (a) corresponds to the home screen SC1, and (b) corresponds to the home screen SC2. Among icon images and windows, a frame with a two-dot chain line and a horizontal line on the inside means that it has become invisible due to drawing processing such as so-called grayout or blackout. The icon image or window that has become invisible is designed so that the user cannot visually determine what the original display looked like. However, even when the icon image or window becomes invisible, the arrangement position and image size on the home screen remain the same, and the layout of the home screen is maintained.

  First, the home screens SC1a and SC2a when the terminal device 10B of “XX Hanako” is a guest terminal will be described with reference to FIG. When the guest terminal is the terminal device 10B, as shown in FIG. 4, display and remote operation are restricted for the SNS, the game applications 1 to 3 and the phone book application. Therefore, on the home screens SC1a and SC2a, the icon images I4 to I7 and I12 become invisible, and the application programs cannot be used by remote operation (specifically, execution of application programs, setting change, etc.). ing. Therefore, as shown in FIG. 8A, the background image BG1 and the icon images I1 to I3 are displayed on the home screen SC1a, but the icon images I4 to I6 are invisible. As shown in FIG. 8B, on the home screen SC2a, the background image BG1, the icon images I8 to I11, and the window W are displayed, but the icon images I7 and I12 are invisible.

  Next, home screens SC1b and SC2b when the terminal device 10C of “ΔΔ Taro” is a guest terminal will be described with reference to FIG. When the guest terminal is the terminal device 10 </ b> C, as illustrated in FIG. 4, display and remote operation are restricted for the setting applications 1 and 2, the gallery, and the phone book application. Therefore, on the home screens SC1b and SC2b, the icon images I1 to I3 and I12 become invisible, and those application programs cannot be used by remote operation. Therefore, as shown in FIG. 9A, the background image BG1 and the icon images I4 to I6 are displayed on the home screen SC1b, but the icon images I1 to I3 are invisible. As shown in FIG. 9B, on the home screen SC2b, the background image BG1, the icon images I7 to I11, and the window W are displayed, but the icon image I12 is invisible.

Next, home screens SC1c and SC2c when the terminal device 10D of “XX company” is a guest terminal will be described with reference to FIG. When the guest terminal is the terminal device 10D, display and remote operation are restricted except for the pre-in apps 1 to 3, as shown in FIG. Therefore, on the home screens SC1c and SC2c,
The background image BG1 and the icon images I1 to I7, I11, and 12 are invisible, and their application programs cannot be used by remote operation. Therefore, as shown in FIG. 10A, both the background image BG1 and the icon images I1 to I6 are invisible on the home screen SC1c. As shown in FIG. 10B, on the home screen SC2c, icon images I8 to I10 are displayed, but the icon images I7 and I12 and the window W are invisible. Regarding the background image, the background image BG1 is not displayed when the screen is shared, and the default background image BG2 is arranged on the home screens SC1c and SC2c.
As described above, the terminal device 10A refers to the setting information table 161 storing the setting information for each screen sharing partner, and sets screen sharing using a method according to the terminal device 10B, 10C, or 10D as the partner. Do. In this manner, the terminal device 10A allows the screen sharing partner to permit or disallow the use or non-display of the background image and icon image, the window arranged on the home screen, and the remote operation of the application program. Can be different.

  Further, as described above, even when the terminal device 10A realizes the linkage function, the terminal device 10A restricts display and remote operation related to the function according to the setting information. As shown in FIG. 10B, when the screen sharing with the terminal device 10D is performed, the terminal device 10A hides the widget window W corresponding to the search application and cannot use the widget by remote operation. I am doing so. The reason for this is to make the icon image corresponding to the application program invisible. For example, the application program installed on the host terminal is notified to the guest user by a notification about the display of the widget or the update of the application program by the notification function. This is to avoid this because it may be grasped.

Returning to the description of FIG.
When the control unit 11 determines that the setting information corresponding to the guest terminal is not stored in the setting information table 161 in the process of step S62 described above (step S62; NO), whether or not screen sharing is permitted by the host user. Is determined (step S65). For example, when the setting information of the guest terminal cannot be acquired from the setting information table 161, the control unit 11 displays a screen for inquiring the host user as to whether or not to share the screen on the display unit 15, and whether or not the determination is possible. To be specified by the host user. If the host user is permitted to perform screen sharing (step S65; YES), the control unit 11 performs screen sharing settings (step S66). Here, the control unit 11 may set the screen sharing in any way. However, since it is considered that the host user is highly likely not to know the guest user, for example, the setting “XX company” is set. You may set screen sharing according to the information. Moreover, the setting method of screen sharing when setting information cannot be acquired from the setting information table 161 is determined in advance, and the control unit 11 may perform setting according to the setting method. Further, the control unit 11 may cause the host user to specify a screen sharing setting method on the spot.

If the control unit 11 determines in the process of step S65 that the host user is not permitted to perform screen sharing (step S65; NO), the control unit 11 ends the screen sharing start process without setting screen sharing. , Do not start screen sharing.
Note that if the control unit 11 determines “NO” in the process of step S62, the screen sharing start process may be terminated without setting the screen sharing, and the screen sharing may not be started.

  By the way, when screen sharing is performed, a predetermined operation is performed on the terminal device 10A by the host user, and an instruction to display the original home screen (that is, the home screens SC1 and SC2 shown in FIG. 3) is given. There is a case. The operation of the terminal device 10A in this case will be described with reference to FIG.

FIG. 11 is a flowchart illustrating a process executed by the terminal device 10A when the screen is shared.
The control unit 11 of the terminal device 10A determines whether display of the original home screen is instructed when screen sharing is being performed (step S81). Here, when the physical key 142 for returning to the display of the home screen is operated by the host user or when the operation for returning to the display of the home screen is performed by the touch screen 141, the control unit 11 returns to the original home screen. It is determined that the screen display is instructed.
When the control unit 11 determines that the display of the original home screen has been instructed (step S81; YES), the control unit 11 inquires of the host user whether the screen sharing can be continued (step S82). Here, as shown in FIG. 12A, the control unit 11 displays a message “Do you want to continue screen sharing?”, A soft button SB1 marked “Yes”, and a soft button marked “No”. An inquiry screen in which SB2 is arranged is displayed on the display unit 15. The control unit 11 receives a response from the host user by an operation of selecting the soft button SB1 or SB2.

  Here, if the control unit 11 determines that the soft button SB1 is selected by the host user and the continuation of screen sharing is permitted (step S83; YES), the control unit 11 inquires the host user about whether or not the original home screen can be displayed ( Step S84). In this case, as shown in FIG. 12B, the control unit 11 described the message “Do you want to display the original home screen?”, The soft button SB3 marked “Yes”, and “No”. An inquiry screen on which the soft button SB4 is arranged is displayed on the display unit 15. The control unit 11 receives a response from the host user by an operation of selecting the soft button SB3 or SB4.

When the control unit 11 determines that the soft button SB3 is selected by the host user and the display of the original home screen is permitted (step S85; YES), the control unit 11 displays the original home screen on the display unit 15 and performs screen sharing. Continue (step S86). Thereby, the control unit 11 switches the home screen shown in FIGS. 8A, 9A, and 10A to the original home screen SC1 shown in FIG. 3A and continues screen sharing. To do. Also, the control unit 11 continues the screen sharing by switching the home screen shown in FIGS. 8B, 9B, and 10B to the original home screen SC2 shown in FIG. 3B. .
Here, the control unit 11 cancels the remote operation restriction when sharing the screen for the original home screen, but cancels the display restriction for the original home screen and does not release the remote operation restriction. Good.

By the way, when the soft button SB2 is selected by the host user in the process of step S83 and the control unit 11 determines that the continuation of screen sharing is not permitted (step S83; NO), the screen sharing ends (step S83). S87).
In the process of step S85, when the soft button SB4 is selected by the host user and the control unit 11 determines that the display of the original home screen is not permitted (step S85; NO), the setting is performed according to the setting information. Screen sharing is continued using the home screen (step S88). In this case, the control unit 11 shares the home screen as described with reference to FIGS. 8 to 10 and continues screen sharing while restricting display and remote operation.

  The above is the description of the operation of the screen sharing system 1. Here, the operation in the case where the terminal device 10A becomes a host terminal and the terminal device 10B becomes a guest terminal has been described, but any of the terminal devices 10A, 10B, 10C, and 10D becomes a host terminal or a guest terminal. Screen sharing is performed by the above-described procedure. The terminal devices 10A, 10B, 10C, and 10D may include devices that operate only on one of the host terminal and the guest terminal.

  According to the first embodiment described above, the terminal device 10 of the host terminal can generate an object image when screen sharing is performed for the home screen according to the setting information table 161 storing setting information for each screen sharing partner. Set screen sharing to limit display and remote control. As a result, the host user can freely customize the setting information table 161, and the possibility that the information regarding the home screen of the own device is unintentionally grasped by the guest user can be suppressed. In addition, in the screen sharing, the display and remote operation related to the home screen of the host terminal are excessively restricted, and the possibility that the host terminal and the guest terminal are inconvenienced in the screen sharing can be suppressed.

Also, the terminal device 10 of the host terminal maintains the home screen layout even when the object image is invisible when the screen is shared. Thereby, it is possible to prevent the host user from being confused by the operation in screen sharing because the layout of the home screen has changed from before the screen sharing started.
In addition, during screen sharing, the terminal device 10 of the host terminal can also perform screen sharing for the original home screen in response to an instruction from the host user. At that time, the terminal device 10 inquires the host user about whether or not screen sharing can be continued, or asks the host user about whether or not to execute screen sharing on the original home screen. Therefore, it is possible to suppress the possibility that screen sharing is accidentally performed on the original home screen.

[Second Embodiment]
A second embodiment of the present invention will be described.
In this embodiment, the terminal device 10A of the host terminal performs screen sharing by a method unintended by the host user even when there is an application program whose display or remote operation is not restricted in the setting information table 161. It has the structure which makes it not. The terminal device 10 according to the second embodiment has a configuration equivalent to that of the first embodiment described above, and stores a shared history table 162 shown in FIG. Hereinafter, the second embodiment will be described focusing on the configuration and operation different from the first embodiment described above.

FIG. 13 is a diagram showing the configuration of the sharing history table 162.
As illustrated in FIG. 13, the sharing history table 162 is a data table in which each information of “guest terminal”, “previous connection date / time”, and “difference information” is associated. Similarly to the setting information table 161, the guest terminal field is a field in which information indicating the guest terminal is stored. The “previous connection date / time” field stores information indicating the date / time when the connection between the host terminal and the guest terminal was started in the previous screen sharing. The connection date / time indicates, for example, the date / time when the first screen information of the process of step S7 in FIG. 7 is transmitted, but it is only necessary to indicate the date / time when the host terminal and the guest terminal are connected for communication. .

  The “difference information” field is a field in which information indicating a difference in display of object images or a difference in information regarding application programs between the home screen in the previous screen sharing and the current home screen is stored. In other words, the difference information indicates a change in information regarding the home screen from the previous connection date and time to the present. The difference information includes, for example, information indicating installation or uninstallation of the application program and information indicating setting change regarding the application program. For example, if an application program is installed or uninstalled, the display / non-display of the icon image may change accordingly. Therefore, the difference information is also information indicating a difference in display of the object image. As described above, the difference information indicates a difference related to information displayed on the guest terminal when the home screen is shared.

In the example of FIG. 13, for the guest terminal “XX Hanako”, the difference information is “wireless setting change, game application 4: install, game application 5: uninstall”. This difference information indicates that the wireless settings have been changed, the application program corresponding to the game application 4 has been installed, and the application program corresponding to the game application 5 has been uninstalled since the previous connection date and time. Show. Here, the wireless setting change is a setting change related to the application program corresponding to the setting application 1. This wireless setting change is, for example, when there was no W-LAN (Wireless Local Area Network) setting at the time of the previous screen sharing, but when a connection destination access point is newly set after the previous connection date and time, The difference information is stored in the shared history table 162. For the guest terminal “ΔΔ Taro”, the difference information is “game application 4: install, game application 5: uninstall”. For the guest terminal “XX company”, the difference information field is blank, which means that there is no difference in the home screen.
The control unit 11 updates the previous connection date and time in the sharing history table 162 each time screen sharing with the guest terminal is performed. Further, the control unit 11 updates the difference information in the sharing history table 162 every time there is a difference in information regarding the home screen.

FIG. 14 is a functional block diagram illustrating a functional configuration of the control unit 11 of the terminal device 10 serving as a host terminal. The control unit 11 executes the program, thereby specifying the identification unit 111, the setting unit 112, the display control unit 113, the transmission control unit 114, the first inquiry unit 115, the second inquiry unit 116, and the difference detection. Functions corresponding to the unit 117 and the notification unit 118 are realized. The functional blocks having the same names as those in the first embodiment described above realize the same functions in this embodiment.
When the identifying unit 111 identifies a guest terminal that is a screen sharing partner, the difference detection unit 117 and the current home screen displayed on the display unit 15 in the previous screen sharing with the guest terminal as the partner A difference in display of an object image or a difference in information related to an application program is detected on the screen. Here, the difference detection unit 117 acquires the difference information with reference to the sharing history table 162 stored in the storage unit 16, thereby detecting the difference indicated by the information.
The notification unit 118 notifies the host user according to the difference detected by the difference detection unit 117. Here, the notification unit 118 notifies the difference by display on the display unit 15. The setting unit 112 sets screen sharing according to a response from the host user to the difference notification by the notification unit 118. Here, the setting unit 112 receives a response from the user by operating the operation unit 14 of the host user.

FIG. 15 is a flowchart showing the flow of the screen sharing start process. Processing steps denoted by the same reference numerals as those in FIG. 7 are the same as those in the first embodiment described above.
When executing the processing of steps S61 to S63, the control unit 11 of the terminal device 10A determines whether information corresponding to the guest terminal is stored in the sharing history table 162 (step S67). If the control unit 11 determines that the guest terminal information is stored in the sharing history table 162 (step S67; YES), the control unit 11 determines whether a difference in the home screen from the previous screen sharing is detected. (Step S68). Here, the control unit 11 refers to the sharing history table 162 stored in the storage unit 16 and detects the difference indicated by the difference information when the difference information corresponding to the guest terminal is stored. When the control unit 11 determines that a difference in information regarding the home screen has been detected (step S68; YES), the control unit 11 notifies the host user according to the difference by displaying on the display unit 15 (step S69). Here, the control unit 11 makes an inquiry to the host user in order to obtain information necessary for setting screen sharing according to the detected difference.
For example, when the guest terminal is the terminal device 10B, the control unit 11 of the terminal device 10A, as shown in FIG. 16, displays a message “Do you permit sharing of the game application 4?” And “Yes”. An inquiry screen in which the soft button SB5 described and the soft button SB6 labeled "No" are arranged is displayed on the display unit 15. The control unit 11 receives a response from the user through an operation of selecting the soft button SB5 or SB6.
The control unit 11 does not need to notify the difference regarding the game application 4 because the information about the uninstalled application program is not displayed on the home screen.

Then, the control unit 11 performs screen sharing setting according to the setting information acquired from the setting information table 161 and the response from the host user to the notification in the process of step S69 (step S70). Here, when the soft button SB5 is selected by the host user, the control unit 11 performs screen sharing setting so that display and remote operation of the application program corresponding to the game application 4 are not restricted. On the other hand, when the soft button SB6 is selected by the host user, the control unit 11 sets screen sharing so as to restrict display and remote operation of the application program corresponding to the game application 4. Here, from the next time, the control unit 11 may update the setting information table 161 so that the application program corresponding to the game application 4 can be set based on the setting information stored in the setting information table 161.
Note that the screen sharing setting performed by the control unit 11 according to the setting information is the same as in the first embodiment described above.

When the control unit 11 determines that the guest terminal information is not stored in the shared history table 162 in the process of step S67 (step S67; NO), or the home screen has no difference from the previous time in the process of step S68. (Step S68; NO), the process proceeds to Step S64, and screen sharing is set according to the setting information.
Other processing steps are the same as those in the first embodiment described above.

  By the way, when the guest terminal is the terminal device 10 </ b> C, the control unit 11 notifies the difference corresponding to the setting application 1 in the process of step S <b> 69. In the setting information table 161, “O” is written in the fields corresponding to the guest terminals “Hanako XX” and “Setting application 1”. However, because the wireless setting change has occurred, the host user may want to restrict the display and remote operation of the application program corresponding to the setting application 1. Even in such a case, the control unit 11 notifies the difference even when “◯” is written in the setting information table 161 so that the screen can be shared by the method intended by the host user. Also in this case, the control unit 11 may update the setting information table 161 so that screen sharing can be set from the next time according to the user's response to the difference notification.

  According to the second embodiment described above, the terminal device 10 of the host terminal has no restrictions on remote operation or object image display in the setting information table 161, or some change has occurred in the information related to the application program. Even when there is an application program, it is possible to limit the screen so that the screen is not shared in a manner not intended by the host user due to omission of settings or non-setting. In addition, according to the terminal device 10 of this embodiment, there exists an effect equivalent to 1st Embodiment mentioned above.

[Modification]
The present invention can be implemented in a form different from the above-described embodiment. The present invention can also be implemented in the following forms, for example. Further, the following modifications may be combined as appropriate.
(Modification 1)
In each of the above-described embodiments, the terminal device 10A of the host terminal may include a configuration for setting screen sharing so as to restrict access to the storage unit 16 by an external device. This is to prevent the setting information from being referred to by the guest terminal or the like and information related to the home screen of the host terminal from being understood by a third party.
FIG. 17 is a flowchart showing a flow of processing executed by the terminal device 10A when the screen is shared. The control unit 11 determines whether access to the storage unit 16 has been accepted (step S91). When determining that the access to the storage unit 16 has been accepted (step S91; YES), the control unit 11 determines whether the access source is a host terminal (step S92). When the control unit 11 analyzes the access request and determines that the host terminal is the access source (step S92; YES), the control unit 11 determines whether or not the host user has permitted continuation of screen sharing (step S92). S93). Here, when the control unit 11 determines that the continuation of screen sharing is permitted (step S93; YES), the control unit 11 permits access to the storage unit 16 and permits reference to the setting information table 161 (step S94). . Here, the control unit 11 permits browsing and updating of the contents of the setting information table 161.

On the other hand, when the control unit 11 determines that the continuation of screen sharing is not permitted in the process of step S93 (step S93; NO), the control unit 11 permits access to the storage unit 16 after ending screen sharing and sets the setting. Reference to the information table 161 is permitted (step S95).
Further, when the control unit 11 determines in step S92 that the access source is not the host terminal, that is, the guest terminal that has received access by the communication unit 13 (step S92; NO), the control unit 11 denies access to the storage unit 16. Then, reference to the setting information table 161 is not permitted (step S96). Here, the control unit 11 disallows both browsing and updating of the contents of the setting information table 161.

According to the terminal device 10 of the first modification, since the contents of the setting information table 161 of the host terminal can be prevented from being browsed or changed by the guest user, information leakage from the setting information table 161 can be prevented. Can do.
In the process of step S94, the control unit 11 permits the access from the host terminal while continuing the screen sharing, but at this time, the sharing is performed so that the screen including the information related to the setting information table 161 is not displayed on the guest terminal. The transmission of screen information indicating the screen to be performed may be stopped. For example, the control unit 11 stops the transmission of the screen information during a period in which information regarding the setting information table 161 is displayed on the display unit 15. Or the control part 11 may transmit the screen information just before displaying regarding the setting information table 161 to a guest terminal, and may continue the screen display in a guest terminal.

(Modification 2)
In Modification 1, when the terminal device 10A of the host terminal accepts access to the storage unit 16 from a predetermined information processing device, the terminal device 10A permits access to the storage unit 16 by the information processing device. Also good. The terminal device 10 </ b> A of this modification stores an access management table 163 in the storage unit 16.
FIG. 18 is a diagram showing the configuration of the access management table 163. As illustrated in FIG. 18, the access management table 163 is a data table in which pieces of information “device ID” and “accessibility” are associated with each other.
The “device ID” field is a field in which identification information for identifying an information processing device externally connected to the terminal device 10A is stored. For example, the information processing apparatus communicates with the terminal apparatus 10A by short-range wireless communication such as Bluetooth (registered trademark), infrared communication, communication using a contact or non-contact IC chip, or wired communication. It is a processing device. The terminal apparatus 10 includes a communication interface for communicating with these information processing apparatuses. The information processing apparatus may communicate with the terminal apparatus 10A via the communication network NW. The “accessibility” field is a field for storing information indicating whether access to the storage unit 16 is possible. For example, the host user designates whether access is possible.

FIG. 19 is a flowchart illustrating a flow of processing executed by the terminal device 10A when the screen is shared. Processing steps denoted by the same reference numerals as those in FIG. 17 are the same as those in the first embodiment described above.
When the control unit 11 determines that the access to the storage unit 16 has been received in the process of step S91 (step S91; YES), the access source is the host terminal or the information processing in which the device ID is registered in the access management table 163. It is determined whether or not it is a device (step S92a). If the control unit 11 refers to the access management table 163 and determines that the device ID of the access source information processing device matches the device ID permitted to be accessed in the access management table 163, the control unit 11 executes step S93. Proceed to processing. Other processes executed by the terminal device 10A are the same as those of the first modification described above.

According to the terminal device 10 of the second modification, the terminal device 10 serving as the host terminal does not uniformly prohibit access to the storage unit 16 of devices other than the host terminal, but is possessed by the host user or another user. Since access by another information processing apparatus is permitted and reference to the setting information table 161 is permitted, browsing and updating of the contents of the setting information table 161 can be improved for the user while protecting the information.
In this modification, the device IDs of both the devices that are permitted to be accessed and the devices that are not permitted are not written in the access management table 163, but either one of the device IDs is written. Good.

(Modification 3)
In each embodiment described above, in order to shorten the time from when the guest terminal transmits the screen sharing start request until the screen is actually displayed, the terminal device 10 of the host terminal is used for the previous screen sharing. The obtained screen information may be transmitted to the guest terminal prior to screen sharing. The terminal device 10 according to this modification stores a cache management table 164 in the storage unit 16.
FIG. 20 is a diagram showing the configuration of the cache management table 164. As illustrated in FIG. 20, the cache management table 164 is a data table in which pieces of information “guest terminal” and “cache information” are associated with each other. The “guest terminal” field stores information indicating a guest terminal. The “cache information” field is a field in which screen information used in the previous screen sharing is stored. This cache information is, for example, screen information indicating the screen that was last displayed in the previous screen sharing. In order to store such cache information for each guest terminal, the control unit 11 stores the cache information in the cache management table 164 when screen sharing ends.

FIG. 21 is a flowchart showing the flow of the screen sharing start process. Processing steps denoted by the same reference numerals as those in FIG. 7 are the same as those in the first embodiment described above.
When executing the processing of steps S61 to S63, the control unit 11 of the terminal device 10A acquires the cache information corresponding to the guest terminal specified in the processing of step S61 from the cache management table 164, and the acquired cache information is the guest terminal. It transmits to address (step S71). The guest terminal that has received the cache information causes the display unit 15 to display the home screen indicated by the cache information before the screen information transmitted in step S7.
When the cache information is transmitted in the process of step S71, the control unit 11 sets screen sharing according to the setting information in the process of step S64, and then transmits the screen information of the current home screen in the process of step S8. To send to the guest terminal.

  According to the terminal device 10 of this modified example, the guest terminal displays the home screen indicated by the cache information before receiving the screen information transmitted after the setting of screen sharing at the host terminal is completed. In that case, the time when the screen sharing is started becomes experientially faster.

(Modification 4)
In each of the embodiments described above, the terminal device 10A serving as the host terminal restricts the display of the object image and the remote operation during screen sharing according to the setting information, but restricts only the display of the object image or the remote operation. May be. In addition, the terminal device 10A permits the display of the object image but does not permit the remote operation, and conversely does not permit the display of the object image but permits the remote operation, so that one application program is provided. Corresponding display restrictions and remote control restrictions may be different. Further, when restricting remote operation related to the application program, the terminal device 10A may not allow the guest terminal to use all the functions realized by the application program, or may not use some functions. Also good. Further, when there are a plurality of object images corresponding to the application program, the terminal device 10A may make all these object images invisible or partially invisible when restricting the display.
In addition, when the terminal device 10A restricts display or remote control related to the linkage function corresponding to one application program, it can be restricted in the same manner.

(Modification 5)
The setting information table 161 storing the setting information used in each embodiment described above is an example, and the following setting information table may be used.
For example, in the setting information table 161a illustrated in FIG. 22, information indicating the display mode is stored instead of the information indicating the guest terminal in the setting information table 161. The display mode is a mode in which restrictions on remote operation and object image display are defined. For example, in mode a, the SNS, game applications 1 to 4 and the phone book application are restricted, and in mode b, the setting application, the gallery, and the phone book application are restricted. In mode c, other than the pre-in applications 1 to 3 are restricted.

In this aspect, the terminal device 10 stores a user management table 165a shown in FIG. The user management table 165a is a data table that stores a display mode and information defining restrictions on display of a background image for each guest terminal. According to the user management table 165a, it is determined that “XX Hanako” performs screen sharing in mode a and displays the background image BG1, and “ΔTaro” performs screen sharing in mode b, and the background. It is determined that the image BG1 is displayed, and the screen sharing is performed in the mode “c”, and the default background image BG2 is displayed without displaying the background image BG1. Even when the terminal device 10 of the host terminal uses these data tables, it is possible to perform remote operation and display restrictions in screen sharing as in the above-described embodiments.
The following setting information table may be used.

  For example, in the setting information table 161b illustrated in FIG. 24, group information is stored instead of the guest terminal information in the setting information table 161. The group information is information indicating a group to which the application program belongs. For example, in the group information, application programs having similar functions to be realized are classified into the same group, or from the viewpoint of information protection, application programs having the same or similar information sensitivity are classified as the same. It has been determined to. For example, the group for the pre-in app is determined at the design stage or the like, and the classification for the add-in app is determined by the host user.

  In this aspect, the terminal device 10 stores a user management table 165b shown in FIG. The user management table 165b defines group information and background image display restrictions for each guest terminal. According to the user management table 165b, for “Hanako”, screen sharing is performed so as to limit the groups b and c without limiting the group a, and the background image BG1 is displayed. For “ΔΔ Taro”, it is defined that the screen sharing is performed so as to restrict the group a without restricting the groups b and c, and to display the background image BG1. As for “XX company”, screen sharing is performed so that the groups a and b are restricted without restricting the group c, and the default background image BG2 is displayed without displaying the background image BG1. ing. Even when the terminal device 10 of the host terminal uses these data tables, it is possible to perform remote operation and display restrictions in screen sharing as in the above-described embodiments.

(Modification 6)
When the terminal device 10 of the host terminal restricts the display of the icon image, a method other than the method of making it invisible by the drawing process while maintaining the layout as in the above-described embodiments may be used.
For example, as shown in FIG. 26, when icon images I1 to I16 are arranged in alignment on the home screen SC1, a case is considered in which screen sharing is performed with the icon images I11 and I15 being invisible. In this case, as shown on the home screen SC1d in FIG. 27, the control unit 11 may make the icon images I11 and I15 invisible by making them transparent so that the background image is displayed at the display position. Also, as shown on the home screen SC1e in FIG. 28, the control unit 11 may arrange the icon images that are later arranged in order so as not to leave the position of the invisible icon. Thereby, the terminal device 10 displays the icon images I17 and I18 displayed by the operation of changing the screen before the screen sharing without the operation when the screen is shared.

(Modification 7)
In each of the embodiments described above, the terminal device 10 serving as a host terminal restricts display and remote operation related to the linkage function according to the setting information. In this case, the control unit 11 determines whether or not information is displayed on the home screen when the application program that restricts the linkage function is started. If there is such a display, the screen sharing that has been performed until then is performed. You may make it cancel or stop a linkage function.
Note that the control unit 11 may confirm whether or not the application is activated before stopping the screen sharing, and may stop the screen sharing only when the activation is permitted. Further, in the case of a terminal device or the like that does not realize the linkage function, the display device related to the linkage function and the remote operation may not be limited.

(Modification 8)
In each of the embodiments described above, the screen sharing system 1 has the server device 20, but may have a configuration without this. In this case, the terminal device 10 of the guest terminal only needs to store the database that the server device 20 has. For example, the terminal device 10 of the guest terminal obtains the host IP by referring to the database and requests the start of screen sharing. The host terminal that has received this request determines whether or not screen sharing is possible according to an instruction from the host user, and transmits the possibility to the guest terminal. And when performing screen sharing, the control part 11 should just perform operation | movement like each embodiment mentioned above after performing screen sharing start processing by the process of step S6.

(Modification 9)
The present invention is also applicable to so-called thin client technology. In this case, when an operation is performed on a host terminal having a display unit that displays a screen including a home screen, the screen sharing apparatus of the present invention receives operation information indicating the operation from the host terminal. Then, the screen sharing device accepts the operation indicated by the received operation information, restricts the display on the display unit of the host terminal and the guest terminal by communication, restricts the remote operation from the guest terminal, Share screens.

(Modification 10)
In each of the above-described embodiments, when the display of the original home screen is instructed by the host user when screen sharing is performed, the control unit 11 determines whether or not to continue screen sharing in step S82 of FIG. And inquiring to the host user whether or not the original home screen can be displayed in step S84 of FIG. Instead, the control unit 11 may determine whether or not the original home screen can be shared by making only one of the inquiries. The control unit 11 may reverse the order of these two types of queries.

(Modification 11)
Moreover, each function which the control part 11 of the terminal device 10 implement | achieves is implement | achieved by the combination of a some program, or may be implement | achieved by cooperation of a some hardware resource. In the terminal device 10, hardware in which the operation unit and the display unit are integrated may be used.
Further, the present invention can be implemented not only in the terminal device 10 but also in the form of a screen sharing method performed by a computer and a program for causing the computer to function as the terminal device 10. Such a program may be provided in a form recorded on a recording medium such as an optical disc, or may be provided in a form such that the program is downloaded to a computer via a network such as the Internet, and the program can be installed and used. Is possible.

DESCRIPTION OF SYMBOLS 1 ... Screen sharing system 10, 10A, 10B, 10C, 10D ... Terminal device, 11 ... Control part, 111 ... Identification part, 112 ... Setting part, 113 ... Display control part, 114 ... Transmission control part, 115 ... 1st Inquiry unit 116 ... second inquiry unit 117 ... difference detection unit 118 ... notification unit 12 ... voice input / output unit 13 ... communication unit 14 ... operation unit 141 ... touch screen 142 ... physical key 15 ... Display unit 16... Storage unit 161, 161 a, 161 b... Setting information table 162 162 shared history table 163 access management table 164 cache management table 165 a 165 b user management table 20 server device

Claims (12)

A communication unit that communicates with an external device;
When the home screen on which an object image corresponding to a program executed by the device itself is arranged is shared with the external device, the display of the object image on the display unit that displays the image is restricted or remotely controlled A storage unit that stores the setting information that defines the restrictions for each screen sharing partner;
A specifying unit for specifying an external device that is a partner of the screen sharing;
A setting unit for setting the screen sharing so as to restrict the display of the object image or the remote operation from the external device according to the setting information stored in the storage unit corresponding to the external device specified by the specifying unit When,
A screen sharing apparatus comprising: a transmission control unit configured to transmit screen information indicating the home screen to the external device specified by the specifying unit by the communication unit after setting the screen sharing by the setting unit. When the external device to be the screen sharing partner is specified by the specifying unit, the object in the home screen and the current home screen displayed on the display unit in the previous screen sharing with the external device A difference detection unit for detecting a difference in display of images or a difference in information about the program;
A notification unit that performs notification to the user of the own device according to the difference detected by the difference detection unit,
The setting unit
The screen sharing apparatus according to claim 1, wherein the screen sharing setting is performed according to a response from the user to the notification by the notification unit. When the user of the device itself is instructed to display the original home screen that does not restrict the display of the object image on the display unit when the screen sharing is performed, the display of the original home screen is performed. A first inquiry unit that inquires the user whether or not it is possible;
The setting unit
3. The screen sharing apparatus according to claim 1, wherein a setting is made as to whether or not the original home screen can be displayed according to a response from the user to the inquiry by the first inquiry unit. If the user of the device itself is instructed to display the original home screen that does not restrict the display of the object image on the display unit when the screen sharing is being performed, whether or not the screen sharing can be continued is determined. A second inquiry unit for making an inquiry to the user;
The setting unit
4. The screen sharing apparatus according to claim 1, wherein a setting is made as to whether or not the screen sharing can be continued according to a response from the user to the query by the second query unit. 5. The storage unit
Remote operation related to a home application program executed to display the home screen on the display unit, remote operation related to an application program other than the home application program executed by the own device, or remote control related to the object image corresponding to a background image The screen sharing apparatus according to any one of claims 1 to 4, wherein the setting information that determines whether or not an operation is possible is stored. The setting unit
6. The setting information is not referred to when the communication unit accepts access to the storage unit from the specified external device when the screen sharing is being performed. The screen sharing apparatus according to any one of claims. The setting unit
The screen sharing apparatus according to claim 6, wherein, when access to the storage unit from a predetermined information processing apparatus is received, the setting information is referred to by the information processing apparatus. The storage unit
Screen information indicating the home screen displayed on the display unit in the previous screen sharing is stored for each sharing partner of the screen sharing,
The transmission control unit
When the screen sharing is started, the screen stored in the storage unit corresponding to the external device specified by the specifying unit before transmitting the screen information after the setting of the screen sharing by the setting unit The screen sharing apparatus according to claim 1, wherein the information is transmitted to the external apparatus by the communication unit. When selectively displaying any of the plurality of home screens on the display unit,
The storage unit stores the individual setting information for each home screen,
The said setting part performs the setting of the said screen sharing according to the setting information memorize | stored in the said memory | storage part corresponding to the home screen displayed on the said display part. The screen sharing apparatus according to item. The setting unit
10. The screen sharing apparatus according to claim 1, wherein display or remote operation of an image on the display unit related to a function linked to the program is restricted according to the setting information. The setting unit
11. The screen sharing apparatus according to claim 1, wherein the object image for which display restriction is determined by the setting information is made invisible without changing a layout of the home screen. A specific step of identifying an external device with which the screen is shared;
Setting that defines restrictions on the display of the object image on the display unit that displays the image or restrictions on the remote operation when the screen is shared with an external device for the home screen on which the object image corresponding to the program is arranged An acquisition step of acquiring the setting information stored corresponding to the external device specified in the specifying step with reference to a storage unit that stores information for each screen sharing partner;
A setting step for setting the screen sharing so as to limit the display of the object image or the remote operation from the identified external device according to the setting information acquired in the acquiring step;
A screen sharing method, comprising: a transmission step of transmitting screen information indicating the home screen to the specified external device after setting screen sharing in the setting step.

Images