JP6382708B2 - Communication terminal, display control system, and display control method - Google Patents

Description

  The present invention relates to a communication terminal, a display control system, and a display control method.

  Conventionally, a technique for sharing a screen by displaying a display screen displayed on a display device on another device has been proposed. For example, Patent Literature 1 captures a display screen displayed on a display unit of a display device, acquires a captured image, and transfers the captured image to another device, thereby allowing the display device and the other device to A screen sharing technique for sharing a screen between them is disclosed. By using such a technique, it becomes possible to display the display screen of the content displayed on one terminal on another terminal.

JP 2012-133586 A

  By the way, when there are a plurality of terminals in a meeting or a lesson, the display screen of one terminal may be displayed on another plurality of terminals. For example, in a class, a display screen displayed on a teacher's terminal may be displayed on a plurality of student terminals. In this case, for example, there is a case where the teacher wants to display the display screen of one student's terminal on the display screen of another student's terminal in order to show the student an example of the answer. However, the screen sharing technique described in Patent Document 1 is for sharing a screen between two terminals, and is displayed on any one terminal among three or more terminals. The screen is not displayed on other terminals. Therefore, it is required to display the display screen displayed on any one of the three or more terminals on other terminals.

  The present invention has been made in view of these points, and a communication terminal capable of displaying a display screen displayed on any one terminal among three or more terminals, on other terminals, An object of the present invention is to provide a display control system and a display control method.

  The communication terminal according to the first aspect of the present invention is a communication terminal that displays a display screen on a plurality of terminals, the display control unit that displays the display screen on a display unit, and the display that is displayed on the display unit A screen transmission unit that transmits screen data corresponding to a display screen to the plurality of terminals, a selection unit that selects one of the plurality of terminals, and a screen that corresponds to the display screen displayed on the selected terminal A screen receiving unit for receiving data from the terminal, wherein the display control unit switches the display screen displayed on the display unit to a display screen corresponding to the received screen data, and the screen transmission unit The screen data corresponding to the display screen displayed on the display unit is transmitted to another terminal different from the selected terminal among the plurality of terminals.

  The display control unit includes a selection screen for accepting selection of the terminal and a shared screen to be displayed on the plurality of terminals as the display screen, and displays a display screen corresponding to the received screen data on the shared screen. The screen transmission unit may transmit the shared screen to the terminal.

The selection unit may select the terminal in response to receiving a request to display a display screen on the other terminal from any of the plurality of terminals.
When the selection unit receives the request, the selection unit accepts whether to allow the display screen of the terminal that has transmitted the request to be displayed on the other terminal, and is permitted to display on the other terminal. Depending on the situation, the terminal that transmitted the request may be selected.

  The display control unit switches the display screen displayed on the display unit to a display screen corresponding to the screen data received from the selected terminal, and changes the identification information of the selected terminal to You may display on a display screen.

  The communication terminal according to the second aspect of the present invention is a communication terminal that displays a display screen on a plurality of terminals, a display control unit that displays the display screen on the display unit, and an instruction that instructs display of the display screen An instruction information transmission unit that transmits information to the plurality of terminals, and a screen transmission that transmits screen data corresponding to the display screen to the plurality of terminals upon receiving a request for the display screen displayed on the display unit And a selection unit that selects one of the plurality of terminals, the instruction information transmission unit transmits instruction information for stopping display of the display screen to the selected terminal and is selected Instruction information for instructing display of a display screen displayed on the terminal is transmitted to a terminal different from the selected terminal among the plurality of terminals.

  A display control system according to a third aspect of the present invention is a display control system including a plurality of sink terminals and a source terminal that causes a display screen to be displayed on the plurality of sink terminals. A display control unit that displays the image on the display unit, a screen transmission unit that transmits screen data corresponding to the display screen displayed on the display unit to the plurality of terminals, and a selection of the plurality of terminals A selection unit; and a screen reception unit that receives screen data corresponding to the display screen displayed on the selected terminal from the terminal, and the display control unit displays the display displayed on the display unit. The screen is switched to a display screen corresponding to the received screen data, and the screen transmission unit transmits screen data corresponding to the display screen displayed on the display unit among the plurality of terminals. The sink terminal receives a screen data transmitted from the source terminal, and the second screen receiving unit transmits a screen from the source terminal to the other terminal different from the selected terminal. In response to receiving the data, the second display control unit for displaying the display screen corresponding to the screen data on the display unit, and the acquisition request for the display screen displayed on the display unit from the source terminal According to this, it has the 2nd screen transmission part which transmits the screen data corresponding to the said display screen to the said source terminal.

  A display control method according to a fourth aspect of the present invention is a display control method for displaying a display screen on a plurality of sink terminals, the step of displaying the display screen on a display unit of a source terminal, and the display on the display unit The display screen being transmitted to the plurality of sink terminals and displayed on the plurality of sink terminals, the step of selecting any of the plurality of sink terminals, and the source terminal selecting the selected Receiving screen data corresponding to the display screen displayed on the sink terminal from the sink terminal, and converting the display screen displayed on the display unit of the source terminal into a display screen corresponding to the received screen data; A screen data corresponding to the display screen displayed on the display unit of the source terminal is selected from the plurality of terminals. Sent to other different terminal and the terminal comprises a step of displaying to the other terminal.

  According to the present invention, there is an effect that a display screen displayed on any one terminal among three or more terminals can be displayed on other terminals.

It is a figure which shows the outline | summary of the display control system which concerns on 1st Embodiment. It is a figure which shows the outline | summary of the display control system which concerns on 1st Embodiment. It is a figure which shows the structure of the source terminal which concerns on 1st Embodiment. It is a figure which shows the structure of the sink terminal which concerns on 1st Embodiment. It is a figure which shows an example of the display screen displayed on the display part of a source terminal. It is a sequence which shows the flow of a process in the source terminal and sink terminal which concern on 1st Embodiment. It is a figure which shows the outline | summary of the display control system which concerns on 2nd Embodiment. It is a figure which shows the outline | summary of the display control system which concerns on 2nd Embodiment. It is a figure which shows the structure of the source terminal which concerns on 2nd Embodiment. It is a sequence which shows the flow of a process in the source terminal and sink terminal which concern on 2nd Embodiment. It is a figure which shows an example of the display screen displayed on a display part. It is a figure which shows an example of the display screen when a several sink terminal is selected. It is a figure which shows the example by which the some screen was displayed on the display part of the sink terminal. It is a figure which shows an example of the display screen displayed on the display part of a source terminal.

Hereinafter, embodiments of the present invention will be described.
<First Embodiment>
[Outline of display control system S]
FIG. 1 is a diagram illustrating an overview of a display control system S according to the first embodiment. The display control system S includes a source terminal 1 as a communication terminal and a plurality of sink terminals 2 (sink terminals 2A, 2B, and 2C), and any one of three or more terminals is connected to any one terminal. In this system, the displayed display screen is displayed on a plurality of other terminals.

  The source terminal 1 and the plurality of sink terminals 2 are computers such as notebook computers and tablets. The source terminal 1 and the plurality of sink terminals 2 exist on the same local network, for example, and are connected to a router (not shown).

  In the first embodiment, the source terminal 1 and the plurality of sink terminals 2 are set to share a display screen with each other. In response to receiving a predetermined operation from the user, the source terminal 1 transmits screen data indicating the display screen of the source terminal 1 to the plurality of sink terminals 2 as shown in FIG. Are displayed on the plurality of sink terminals 2.

  Thereafter, in response to the selection of any one of the plurality of sink terminals 2 from the user, the source terminal 1 receives screen data for the sink terminal 2 as shown in FIG. 1B. The transmission is stopped, the sink terminal 2 is accessed, and screen data indicating a display screen displayed on the display unit of the sink terminal 2 is received.

The source terminal 1 displays the received display screen on its own display unit, and transmits the screen data displayed on the display unit to another sink terminal 2 different from the selected sink terminal 2. As a result, the display screen of the selected sink terminal 2 is displayed on the other sink terminal 2. By doing in this way, the source terminal 1 can display the display screen currently displayed on arbitrary one terminals among the several terminals of 3 or more on another several terminal.
Hereinafter, the configurations of the source terminal 1 and the sink terminal 2 constituting the display control system S will be described.

[Configuration example of source terminal 1]
First, the functional configuration of the source terminal 1 will be described. FIG. 2 is a diagram illustrating a configuration of the source terminal 1 according to the first embodiment.
The source terminal 1 includes a display unit 11, an input unit 12, a communication unit 13, a storage unit 14, and a control unit 15.

  The display unit 11 is configured by, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display. The display unit 11 displays, for example, a display screen including graphics, characters, and the like and a display screen corresponding to the screen data received from the sink terminal 2 under the control of the control unit 15.

  The input unit 12 includes, for example, a button, a contact sensor disposed on the display unit 11, and receives an operation input from the user of the source terminal 1. The input unit 12 may be an external device such as a keyboard connected to the source terminal 1.

  The communication unit 13 communicates with an external device such as the sink terminal 2 wirelessly, for example. Specifically, the communication unit 13 modulates the signal output from the control unit 15 to generate an RF (Radio Frequency) signal, and wirelessly transmits the RF signal via an antenna (not shown). The communication unit 13 demodulates the RF signal received via the antenna and outputs a signal obtained by the demodulation to the control unit 15. Note that the communication unit 13 may perform wired communication when the source terminal 1 is connected to the router by wired such as a LAN cable.

  The storage unit 14 is configured by, for example, a ROM and a RAM. The storage unit 14 stores various programs for causing the source terminal 1 to function. For example, the storage unit 14 stores a display control program that causes the control unit 15 of the source terminal 1 to function as a display control unit 151, a screen transmission unit 152, a selection unit 153, and a screen reception unit 154 described later.

  The control part 15 is comprised by CPU, for example. The control unit 15 controls functions related to the source terminal 1 by executing various programs stored in the storage unit 14. The control unit 15 includes a display control unit 151, a screen transmission unit 152, a selection unit 153, and a screen reception unit 154.

  The display control unit 151 displays the display screen on the display unit 11. FIG. 4 is a diagram illustrating an example of the display screen 110 displayed on the display unit 11 in the present embodiment. For example, as illustrated in FIG. 4, the display control unit 151 displays a screen including a selection screen 111 that accepts selection of the sink terminal 2 and a shared screen 112 that is displayed on the plurality of sink terminals 2 as the display screen 110. To display.

  The display control unit 151 displays a terminal name for identifying each of a plurality of sink terminals 2 with which the source terminal 1 can communicate on the selection screen 111 or a user name of a user who uses the sink terminal 2. A sharing button for accepting sharing of the sharing screen 112 with the sink terminal 2 is displayed. In the selection screen 111 shown in FIG. 4, it can be confirmed that the terminal name of the sink terminal 2 is displayed.

  Further, the display control unit 151 displays the characters, graphics, and the like on the shared screen 112 in response to receiving an operation for drawing characters, graphics, and the like from the user via the input unit 12. The display control unit 151 may accept selection of an image file such as an image, a document file, or a video file, and display the image, document, or video indicated by the selected file on the shared screen 112. The display control unit 151 may receive video data from a television receiver or a recording device connected to the source terminal 1 and display the video indicated by the video data on the shared screen 112. The display control unit 151 may display a screen composed of a plurality of layers on the shared screen 112. For example, in a state where an image file or a document file is displayed on the shared screen 112 as a first layer image, characters or figures input via the input unit 12 are displayed as a second layer image on the first layer image. You may let them.

  The screen transmission unit 152 transmits screen data corresponding to the display screen 110 displayed on the display unit 11 to the plurality of sink terminals 2. Specifically, the screen transmission unit 152 transmits screen data corresponding to the shared screen 112 to the plurality of sink terminals 2 by mirroring in response to pressing of the share button on the selection screen 111. Note that the screen transmission unit 152 may transmit only the display screen 110 displayed on the display unit 11 when the share button is pressed in response to the share button being pressed on the selection screen 111. Further, when transmitting screen data to the plurality of sink terminals 2, the screen transmission unit 152 displays a message indicating that a screen such as “shared” is shared on the display screen 110 corresponding to the screen data. It may be displayed.

  Here, the mirroring is to display the display screen 110 on the sink terminal 2 by capturing the display screen 110 at a predetermined frame rate to generate screen data and transmitting the screen data to the sink terminal 2. Is the method. In the present embodiment, the screen transmission unit 152 captures the shared screen 112 that is a part of the display screen 110 at a predetermined frame rate, generates screen data, and transmits the screen data to the plurality of sink terminals 2. Note that the screen transmission unit 152, when audio is output from a speaker (not shown) provided in the source terminal 1 corresponding to the screen displayed on the shared screen 112, the audio indicating the audio Data may be transmitted to a plurality of sink terminals 2 to output the sound. Further, when a screen composed of a plurality of layers is displayed on the shared screen 112, the screen transmission unit 152 accepts designation of a layer to be shared, and displays screen data indicating an image of the designated layer as a plurality of screen data. You may transmit to the sink terminal 2.

  The screen transmission unit 152 may transmit screen data corresponding to the shared screen 112 to the plurality of sink terminals 2 by casting. Here, the casting is a method in which the source terminal 1 functions as a casting server and transmits screen data indicating the shared screen 112 to the source terminal 1 in response to access from the sink terminal 2.

  The selection unit 153 selects one of the plurality of sink terminals 2. Specifically, the selection unit 153 receives a selection of the terminal name of the sink terminal 2 or the user name of the user who uses the sink terminal 2 on the selection screen 111 included in the display screen 110, thereby allowing a plurality of sinks. One sink terminal 2 is selected from the terminal 2.

  In addition, the selection unit 153 receives the disclosure request for displaying the display screen of the sink terminal 2 on the other sink terminal 2 from any one of the plurality of sink terminals 2. The sink terminal 2 may be selected.

  In this case, when receiving the publication request, the selection unit 153 accepts whether or not to permit the other sink terminal 2 to display the display screen of the sink terminal 2 that has transmitted the publication request. For example, the selection unit 153 receives a selection from the user of the source terminal 1 as to whether or not to allow the display unit 11 to display a reception screen that accepts whether or not to permit the display on another sink terminal 2. . The selection unit 153 selects the sink terminal 2 that has transmitted the request in response to being permitted to display on another sink terminal 2.

  For example, when the user of the source terminal 1 is a teacher and the user of the sink terminal 2 is a student, the teacher is displayed on the sink terminal 2 of the student in response to accepting a public request from the student. It is possible to determine whether or not to display the display screen on the sink terminal 2 of another student. The sink terminal 2 may transmit its own display screen when transmitting the disclosure request. Then, the selection unit 153 displays the display screen of the sink terminal 2 on the reception screen when receiving whether or not to permit the display screen of the sink terminal 2 that transmitted the disclosure request to be displayed on another sink terminal 2. It may be displayed. In this way, the teacher can check the student's display screen and determine whether or not to make it public.

  Further, for example, the source terminal 1 displays a question, an answer column, and a completion button on each display screen of the plurality of sink terminals 2. Then, each of the sink terminals 2 transmits a display screen to the source terminal 1 in response to the student completing entry of the answer and pressing the completion button. The selection unit 153 of the source terminal 1 displays the received plurality of display screens on the selection screen 111. By doing in this way, the teacher can confirm the answer inputted by the student. The sink terminal 2 may transmit the display screen to the source terminal 1 when the completion button has not been pressed even after a predetermined time has elapsed since the problem was displayed on the display screen. As a result, the teacher can also check the situation of students who have not completed answering.

  The screen reception unit 154 receives screen data corresponding to the display screen displayed on the sink terminal 2 selected by the selection unit 153 from the sink terminal 2. Specifically, the screen receiving unit 154 transmits an acquisition request for requesting acquisition of screen data corresponding to the display screen displayed on the sink terminal 2 to the selected sink terminal 2, and the sink terminal 2 2 receives the screen data.

  When the screen receiving unit 154 receives the screen data from the sink terminal 2, the display control unit 151 displays the display screen corresponding to the received screen data on the shared screen 112 displayed on the display unit 11. The display screen 110 displayed on the unit 11 is switched to a display screen corresponding to the received screen data.

  Here, the display control unit 151 switches the shared screen 112 displayed on the display unit 11 to a display screen corresponding to the screen data received from the selected sink terminal 2, and identifies the selected sink terminal 2. Information (the terminal name or user name of the sink terminal 2) may be displayed on the display screen after switching. By doing in this way, when the display screen is displayed on the other sink terminal 2, the user of the other sink terminal 2 can check which user's display screen is displayed. .

  The screen transmission unit 152 stops transmission of screen data to the sink terminal 2 selected by the selection unit 153. In addition, the screen transmission unit 152 transmits screen data corresponding to the shared screen 112 included in the display screen 110 displayed on the display unit 11 to another sink terminal 2 that is different from the selected sink terminal 2. Transmit to the sink terminal 2. As a result, the display screen of the selected sink terminal 2 is displayed on another sink terminal 2 different from the selected sink terminal 2.

[Configuration example of sink terminal 2]
Next, the functional configuration of the sink terminal 2 will be described. FIG. 3 is a functional configuration diagram of the sink terminal 2 according to the first embodiment.
The sink terminal 2 includes a display unit 21, an input unit 22, a communication unit 23, a storage unit 24, and a control unit 25.

  The display unit 21 is configured by, for example, a liquid crystal display or an organic EL display. The display unit 21 displays a display screen corresponding to the screen data acquired from the source terminal 1 under the control of the control unit 25.

  The input unit 22 includes, for example, a button, a contact sensor disposed on the display unit 21, and receives an operation input from the user of the sink terminal 2. Note that the input unit 22 may be an external device such as a keyboard connected to the sink terminal 2.

  The communication unit 23 communicates with an external device such as the source terminal 1 wirelessly, for example. Note that the communication unit 23 may perform wired communication when the sink terminal 2 is connected to the router by wired such as a LAN cable.

  The storage unit 24 is configured by, for example, a ROM and a RAM. The storage unit 24 stores various programs for causing the sink terminal 2 to function. For example, the storage unit 24 sends the control unit 25 of the sink terminal 2 to the screen reception unit 251 as the second screen reception unit, the display control unit 252 as the second display control unit, and the screen transmission as the second screen transmission unit. A display control program that functions as the unit 253 is stored.

  The control part 25 is comprised by CPU, for example. The control unit 25 controls functions related to the sink terminal 2 by executing various programs stored in the storage unit 24. The control unit 25 includes a screen reception unit 251, a display control unit 252, and a screen transmission unit 253.

The screen receiving unit 251 receives screen data corresponding to the shared screen 112 displayed on the display unit 11 from the source terminal 1.
The display control unit 252 displays the characters, graphics, and the like on the display unit 21 in response to receiving an operation for drawing characters, graphics, and the like from the user via the input unit 22. Further, the display control unit 252 causes the display unit 21 to display a display screen corresponding to the screen data in response to the screen reception unit 251 receiving screen data from the source terminal 1.

  In response to receiving a display screen acquisition request displayed on the display unit 21 from the source terminal 1, the screen transmission unit 253 captures the display screen at a predetermined frame rate and generates screen data. Transmit to the source terminal 1.

[sequence]
Subsequently, the flow of processing in the source terminal 1 and the sink terminal 2 will be described. FIG. 5 is a sequence showing a flow of processing in the source terminal 1 and the sink terminal 2 according to the first embodiment. Here, description will be given assuming that sink terminals 2A, 2B, and 2C exist as the plurality of sink terminals 2. Note that at the start of the process illustrated in FIG. 5, it is assumed that the display unit 11 of the source terminal 1 displays the shared screen 112 on which characters, graphics, and the like are displayed.

  First, when the sharing button on the selection screen 111 is pressed to accept a sharing operation on the sharing screen 112 (S1), the screen transmission unit 152 receives screen data corresponding to the sharing screen 112 as the sink terminals 2A, 2B, and Send to 2C. When receiving the screen data, the sink terminals 2A, 2B, and 2C display a display screen corresponding to the screen data on the display unit 21.

  The sink terminals 2A, 2B, and 2C notify the source terminal 1 of notification data for notifying that the screen data has been received or that the display screen corresponding to the received screen data is being displayed on the display unit 21. You may send it. Then, the display control unit 151 of the source terminal 1 receives the screen data in association with the terminal names of the sink terminals 2A, 2B, and 2C displayed on the selection screen 111 in response to receiving the notification data. Alternatively, a message indicating that the display screen corresponding to the received screen data is displayed on the display unit 21 may be displayed. Further, the display control unit 151 may display a message indicating an error in the selection screen 111 in association with the terminal name of the sink terminal 2 that has not received the notification data. By doing in this way, the user of the source terminal 1 can confirm whether the screen display is normally performed in the sink terminal 2 in response to pressing of the share button.

  Thereafter, the selection unit 153 receives the selection of the sink terminal 2 on the selection screen 111 included in the display screen 110 (S2). Here, assuming that the sink terminal 2A is selected, the screen reception unit 154 transmits an acquisition request for requesting acquisition of screen data to the sink terminal 2A. In response to receiving the acquisition request, the sink terminal 2A transmits screen data corresponding to the display screen displayed on the display unit of the sink terminal 2A to the source terminal 1. The screen receiving unit 154 receives screen data transmitted from the sink terminal 2A.

  When the screen receiving unit 154 receives the screen data, the display control unit 151 displays the display screen corresponding to the received screen data on the shared screen 112 displayed on the display unit 11, thereby displaying the display screen on the shared screen 112. The displayed display screen is switched (S3).

  The screen transmission unit 152 stops transmission of screen data to the sink terminal 2A selected by the selection unit 153. Further, the screen transmission unit 152 maintains the transmission of the screen data corresponding to the shared screen 112 to the sink terminals 2B and 2C.

[Effect in the first embodiment]
As described above, when the source terminal 1 according to the first embodiment selects the sink terminal 2, the source terminal 1 receives screen data corresponding to the display screen of the sink terminal 2, and displays the display screen displayed on the display unit 11. Switch to the display screen corresponding to the received screen data. Then, the source terminal 1 transmits screen data corresponding to the display screen displayed on the display unit 11 to a plurality of sink terminals 2 other than the selected sink terminal 2. In this manner, the display screen of the selected sink terminal 2 is displayed on the other plurality of sink terminals 2 without performing an operation corresponding to the selected sink terminal 2. Therefore, the source terminal 1 selects an arbitrary one of the three or more sink terminals 2 to change the display screen displayed on the selected sink terminal 2 to a plurality of other sink terminals 2. It can be displayed on the terminal 2.

<Second Embodiment>
[Transmit screen data directly from the selected sink terminal 2 to another sink terminal 2]
Next, the second embodiment will be described. In the first embodiment, the display screen of the selected sink terminal 2 is displayed on another sink terminal 2 via the source terminal 1. On the other hand, in the second embodiment, the screen data corresponding to the display screen of the selected sink terminal 2 is selected by directly transmitting the screen data from the sink terminal 2 to the other sink terminal 2. Unlike the first embodiment in that the display screen of the sink terminal 2 is displayed, the other points are the same.

Next, details of the display control system S according to the second embodiment will be described. Note that description of functions similar to those of the first embodiment is omitted.
FIG. 6 is a diagram showing an overview of the display control system S according to the second embodiment. In the second embodiment, the source terminal 1 receives instruction information for instructing display of the display screen of the source terminal 1 as shown in FIG. 6A in response to receiving a predetermined operation from the user. 2 to send. In response to receiving the instruction information, the plurality of sink terminals 2 access the source terminal 1 and receive and display screen data corresponding to the display screen of the source terminal 1.

  Thereafter, when the source terminal 1 accepts selection of any one of the plurality of sink terminals 2 from the user, as shown in FIG. 6B, the source terminal 1 sends the source terminal 1 to the sink terminal 2. Instruction information for instructing to stop display of the display screen is transmitted, screen data corresponding to the display screen of the selected sink terminal 2 is received, and the display screen is displayed on the display unit 11 based on the screen data. Further, the source terminal 1 transmits instruction information for instructing display of the display screen of the selected sink terminal 2 to a plurality of other sink terminals 2 different from the selected sink terminal 2.

  The other plurality of sink terminals 2 access the selected sink terminal 2 in response to receiving the instruction information, and receive and display screen data corresponding to the display screen of the selected sink terminal 2. In this way, the source terminal 1 transmits the instruction information to three or more sink terminals 2 to display the display screen displayed on any one sink terminal 2 with the other sink terminals. 2 can be displayed.

[Configuration example of source terminal 1]
Next, the configuration of the source terminal 1 according to the second embodiment will be described. FIG. 7 is a diagram illustrating a configuration of the source terminal 1 according to the second embodiment.
In the second embodiment, the control unit 15 of the source terminal 1 includes a display control unit 151, a screen transmission unit 152, a selection unit 153, a screen reception unit 154, and an instruction information transmission unit 155.

  Since the display control unit 151, the screen transmission unit 152, and the selection unit 153 are the same as the display control unit 151, the screen transmission unit 152, and the selection unit 153 according to the first embodiment, description thereof is omitted.

  The instruction information transmission unit 155 transmits instruction information for instructing display of the display screen to the plurality of sink terminals 2. Specifically, the instruction information transmission unit 155 receives the sharing operation of the sharing screen 112 from the user, and displays the plurality of sink terminals 2 on the display unit 21 and the display unit 11 of the source terminal 1. Instruction information for instructing display of the displayed display screen is transmitted. The instruction information includes the address of the source terminal 1, and the plurality of sink terminals 2 access the source terminal 1 in response to receiving the instruction information and correspond to the display screen of the source terminal 1. Receive and display screen data.

  In addition, the instruction information transmission unit 155 displays instruction information for stopping display on the display unit 21 of the display screen of the source terminal 1 in response to the selection unit 153 selecting the sink terminal 2. 2 to send.

  In addition, the instruction information transmission unit 155 displays instruction information for instructing display of the display screen displayed on the display unit 21 of the selected sink terminal 2 in response to the selection unit 153 selecting the sink terminal 2. It transmits to the sink terminal 2 different from the selected sink terminal 2 among the plurality of sink terminals 2. The instruction information includes the address of the selected sink terminal 2, and the plurality of sink terminals 2 different from the selected sink terminal 2 select the selected sink terminal in response to receiving the instruction information. 2 is received and screen data corresponding to the display screen of the sink terminal 2 is received and displayed.

  Here, when the sink terminal 2 that has received the instruction information receives and displays the screen data corresponding to the selected sink terminal 2, it indicates that the screen data has been received or the display screen corresponding to the screen data is displayed. Notification data notifying that it is displayed on the display unit 21 may be transmitted to the source terminal 1. Then, the display control unit 151 of the source terminal 1 receives screen data from the selected sink terminal 2 in association with the terminal name of the sink terminal 2 displayed on the selection screen 111 in response to receiving the notification data. May be displayed, or a message indicating that a display screen corresponding to the screen data is displayed on the display unit 21 may be displayed. Further, the display control unit 151 may display a message indicating an error in the selection screen 111 in association with the terminal name of the sink terminal 2 that has not received the notification data. By doing in this way, the user of the source terminal 1 can confirm whether the screen display is normally performed in the sink terminal 2 according to the instruction information.

  The screen receiving unit 154 receives screen data corresponding to the display screen of the selected sink terminal 2 by casting in response to the selection unit 153 selecting the sink terminal 2. The display control unit 151 causes the display unit 11 to display a display screen based on the received screen data.

[sequence]
Subsequently, the flow of processing in the source terminal 1 and the sink terminal 2 will be described. FIG. 8 is a sequence showing a flow of processing in the source terminal 1 and the sink terminal 2 according to the second embodiment. Here, description will be given assuming that sink terminals 2A, 2B, and 2C exist as the plurality of sink terminals 2. Note that at the start of the process illustrated in FIG. 8, it is assumed that the display unit 11 of the source terminal 1 displays the shared screen 112 on which characters, graphics, and the like are displayed.

  First, when the sharing button on the selection screen 111 is pressed to accept a sharing operation on the sharing screen 112 (S11), the screen transmission unit 152 transmits screen data corresponding to the sharing screen 112 to the sink terminals 2A, 2B, and Send to 2C.

  Thereafter, the selection unit 153 receives the selection of the sink terminal 2 on the selection screen 111 included in the display screen 110 (S12). Here, assuming that the sink terminal 2A is selected, the instruction information transmission unit 155 transmits instruction information for stopping the display on the display unit 21 of the display screen of the source terminal 1 to the selected sink terminal 2A. To do.

  In addition, the instruction information transmission unit 155 sends instruction information for instructing display of the display screen displayed on the selected sink terminal 2A to a sink terminal 2B different from the selected sink terminal 2A among the plurality of sink terminals 2. And 2C.

  In response to receiving the instruction information, each of the sink terminals 2B and 2C transmits a screen data acquisition request to the sink terminal 2A based on the instruction information, and acquires screen data from the sink terminal 2A. Each of the sink terminals 2B and 2C causes the display unit 21 to display the received screen data.

  The screen receiving unit 154 transmits a screen data acquisition request to the sink terminal 2A in response to the selection unit 153 selecting the sink terminal 2, and receives screen data corresponding to the display screen of the sink terminal 2A. The display control unit 151 causes the display unit 11 to display the display screen of the sink terminal 2A based on the received screen data.

[Effects of Second Embodiment]
As described above, the source terminal 1 of the second embodiment selects instruction information to the plurality of sink terminals 2 by selecting an arbitrary one of the three or more sink terminals 2. The display screen displayed on the selected sink terminal 2 can be transmitted and displayed on a plurality of other sink terminals 2.

<Third Embodiment>
[Sharing display screens of multiple sink terminals 2 simultaneously]
In the first embodiment, the source terminal 1 shares the shared screen of the source terminal 1 or the display screen of one sink terminal 2 with other sink terminals 2. However, there are cases where it is desired to share the display screens displayed on a plurality of sink terminals 2 at a time. Therefore, in the third embodiment, the source terminal 1 causes the other sink terminals 2 to share the display screens of the plurality of sink terminals 2 at a time. Hereinafter, a different part from 1st Embodiment is demonstrated. The description of the same points as in the first embodiment will be omitted as appropriate.

  FIG. 9 is a diagram illustrating an example of the display screen 110 displayed on the display unit 11 in the present embodiment. For example, as illustrated in FIG. 9, the display control unit 151 includes a selection screen 111 that accepts selection of a terminal that shares a screen, a shared screen 112 that is displayed on a plurality of sink terminals 2, and characters from the user of the source terminal 1 And a display screen 110 including a work screen 113 for receiving input of images and the like is displayed on the display unit 11.

  The selection unit 153 of the source terminal 1 transmits reception information for accepting a screen sharing request to each of the plurality of sink terminals 2. When the sink terminal 2 receives the reception information, the sink terminal 2 receives whether or not the user wants to share the screen. When the sink terminal 2 accepts that it wants to share the screen, it sends response information.

  Upon receiving the response information, the selection unit 153 of the source terminal 1 displays a sharing request list indicating the sink terminal 2 that transmitted the response information on the selection screen 111, and selects one or more sink terminals 2 via the list. Accept. Here, the selection unit 153 may accept selection of the own terminal simultaneously with one or more sink terminals 2. The selection unit 153 displays the identification information of the plurality of sink terminals 2 on the selection screen 111 instead of the sharing wish list, and highlights the identification information corresponding to the sink terminal 2 that transmitted the response information. A mark indicating that the response information has been transmitted may be displayed.

  The screen reception unit 154 transmits an acquisition request for requesting acquisition of screen data corresponding to the display screen displayed on the sink terminal 2 to the selected one or more sink terminals 2, from the sink terminal 2. The screen data is received.

  When the screen receiving unit 154 receives screen data from the sink terminal 2, the display control unit 151 displays a display screen corresponding to the received screen data on the shared screen 112 displayed on the display unit 11. Here, when receiving the screen data from the plurality of sink terminals 2, the display control unit 151 corresponds to each of the divided screens obtained by dividing the shared screen 112 with the plurality of screen data received from each of the plurality of sink terminals 2. Display the display screen. FIG. 10 is a diagram showing a display screen 110 when a plurality of sink terminals 2 are selected in the sharing wish list. FIG. 10 shows that the sink terminals 2A, 2B, and 2C are selected, and the display screens corresponding to these sink terminals 2A, 2B, and 2C are displayed on the shared screen 112.

[Effect in the third embodiment]
As described above, the source terminal 1 of the second embodiment shares the display screens of one or more sink terminals 2 selected by the user of the source terminal 1 in the sharing wish list, and thus the users of the source terminal 1 and the sink terminal 2 Can confirm the display screens of the plurality of sink terminals 2 at a time by confirming the shared screen 112. In addition, since the source terminal 1 shares the display screen of the sink terminal 2 selected in the sharing wish list, the user of the source terminal 1 examines which sink terminal 2 the display screen is shared, and You can share the display screen.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. In particular, the specific embodiments of the distribution / integration of the devices are not limited to those illustrated above, and all or a part thereof may be added in arbitrary units according to various additions or according to functional loads. It can be configured functionally or physically distributed and integrated.

[Modification 1]
In the above-described embodiment, the sink terminal 2 switches the display screen displayed on the display unit 21 to the shared screen in response to receiving the screen data indicating the shared screen from the source terminal 1. Absent. For example, as illustrated in FIG. 11, the sink terminal 2 includes a reception screen 211 that displays a shared screen received from the source terminal 1 on a display screen 210 displayed on the display unit 21, and a user from the sink terminal 2. You may display two screens, the user screen 212 which performs display control according to operation. In addition, as illustrated in FIG. 11, the sink terminal 2 may display a work screen 213 that accepts a sharing operation, a memo input, or the like on the display screen 210 displayed on the display unit 21. .

  In this case, the display control unit 252 displays a display screen corresponding to the screen data on the reception screen 211 in response to the screen reception unit 251 receiving screen data from the source terminal 1. In addition, the screen transmission unit 253 displays the user screen 212 displayed on the display unit 21 in a predetermined frame in response to the acquisition request for the display screen displayed on the display unit 21 from the source terminal 1. Screen data is generated by capturing at a rate and transmitted to the source terminal 1. In this way, the user of the sink terminal 2 can perform work using the user screen 212 and the work screen 213 while confirming the shared screen received from the source terminal 1. For example, when the user of the sink terminal 2 is a student and the user of the source terminal 1 is a teacher, the student checks the user screen 212 or the work screen 213 while confirming the explanation and the like shown on the shared screen by the teacher. You can create your own answer using.

[Modification 2]
In the above-described embodiment, the source terminal 1 and the sink terminal 2 are distinguished and the source terminal 1 controls whether or not the screen of the sink terminal 2 is shared. However, the present invention is not limited to this. For example, each of the plurality of sink terminals 2 may also operate as the source terminal 1.

  In this case, the plurality of source terminals 1 display the display screen shown in FIG. 12 and individually display the display screens of the other source terminals 1 or share their screens with the other source terminals 1. Specifically, each of the plurality of source terminals 1 includes, in the selection screen 111, a sharing button 111A for sharing the display screen of its own terminal, a sharing wish list, and a sharing wish list, as shown in FIG. A screen reception button 111B for receiving screen data corresponding to the display screen of the selected terminal is displayed.

  For example, when the user of the source terminal 1 presses the share button 111 </ b> A, the control unit 15 transmits a sharing request for requesting sharing of screen data indicating the work screen 113 to the other source terminal 1. Further, when receiving the sharing request from another source terminal 1, the control unit 15 displays the identification information of the source terminal in the sharing wish list.

  When the screen receiving button 111B is pressed while another source terminal 1 is selected in the sharing wish list, the control unit 15 transmits a screen data acquisition request to the other source terminal 1 selected in the sharing wish list, Screen data is received from the other source terminal 1. Then, the control unit 15 displays a display screen corresponding to the received screen data on the shared screen 112. In this way, each of the plurality of source terminals 1 can individually share its own screen or share the display screen of another source terminal 1.

[Modification 3]
For example, in the above embodiment, the sink terminal 2 includes the display unit 21, but may not include the display unit 21. For example, the sink terminal 2 may display the received screen data on a display device connected to itself. Further, the sink terminal 2 may transmit screen data corresponding to the display screen displayed on the display device connected to the sink terminal 2 to the source terminal 1.

DESCRIPTION OF SYMBOLS 1 ... Source terminal, 11 ... Display part, 12 ... Input part, 13 ... Communication part, 14 ... Memory | storage part, 15 ... Control part, 151 ... Display control part, 152 ... Screen transmission unit, 153 ... Selection unit, 154 ... Screen reception unit, 155 ... Instruction information reception unit, 2 ... Sink terminal, 21 ... Display unit, 22 ... Input unit, 23 ... communication unit, 24 ... storage unit, 25 ... control unit, 251 ... screen reception unit, 252 ... display control unit, 253 ... screen transmission unit

Claims (8)

A communication terminal that displays a display screen on a plurality of terminals,
A display control unit for displaying a display screen on the display unit;
A screen transmission unit for transmitting screen data corresponding to the display screen displayed on the display unit to the plurality of terminals;
A selection unit for selecting one of the plurality of terminals;
A screen receiving unit for receiving screen data corresponding to the display screen displayed on the selected terminal from the terminal;
The display control unit switches the display screen displayed on the display unit to a display screen corresponding to the received screen data,
The screen transmission unit transmits screen data corresponding to the display screen displayed on the display unit to another terminal different from the selected terminal among the plurality of terminals.
Communication terminal. The display control unit includes a selection screen for accepting selection of the terminal and a shared screen to be displayed on the plurality of terminals as the display screen, and displays a display screen corresponding to the received screen data on the shared screen. Let
The screen transmission unit transmits the shared screen to the terminal;
The communication terminal according to claim 1. In response to receiving a request from any one of the plurality of terminals to display the display screen of any one of the plurality of terminals on the other terminal different from the one terminal. Select the one terminal,
The communication terminal according to claim 1 or 2. When the selection unit receives the request, the selection unit accepts whether to allow the display screen of the terminal that has transmitted the request to be displayed on the other terminal, and is permitted to display on the other terminal. Depending on the case, select the device that sent the request,
The communication terminal according to claim 3. The display control unit switches the display screen displayed on the display unit to a display screen corresponding to the screen data received from the selected terminal, and changes the identification information of the selected terminal to Display on the display screen,
The communication terminal according to any one of claims 1 to 4. A communication terminal that displays a display screen on a plurality of terminals,
A display control unit for displaying a display screen on the display unit;
An instruction information transmitting unit for transmitting instruction information for instructing display of the display screen to the plurality of terminals;
Upon receiving a request for the display screen displayed on the display unit, a screen transmission unit that transmits screen data corresponding to the display screen to the plurality of terminals;
A selection unit that selects any one of the plurality of terminals as a selection terminal ;
The instruction information transmitting unit transmits the instruction information for stopping the display of the display screen the screen transmission unit corresponding to the screen data transmitted to the selected terminal to the selected terminal, are displayed on the selection terminal Transmitting instruction information for instructing display of the display screen to a terminal different from the selected terminal among the plurality of terminals;
Communication terminal. A display control system comprising a plurality of sink terminals and a source terminal for displaying a display screen on the plurality of sink terminals,
The source terminal is
A display control unit for displaying the display screen on the first display unit which is its own display unit;
A screen transmission unit that transmits screen data corresponding to the display screen displayed on the first display unit to the plurality of sink terminals;
A selection unit for selecting one of the plurality of sink terminals;
The screen data corresponding to the display screen displayed on the selected the sink terminal and a screen receiving unit that receives from the sink terminal,
The display control unit switches the display screen displayed on the first display unit to a display screen corresponding to the received screen data,
The screen transmission unit transmits the screen data corresponding to the display screen displayed on the first display unit of the plurality of sink terminals, and the other different sink terminal the sink terminal selected,
The sink terminal is
A second screen receiving unit for receiving screen data transmitted from the source terminal;
A second display control unit for displaying a display screen corresponding to the screen data on the second display unit , which is its own display unit , in response to the second screen receiving unit receiving screen data from the source terminal;
A second screen transmission unit for transmitting screen data corresponding to the display screen to the source terminal in response to receiving an acquisition request for the display screen displayed on the second display unit from the source terminal; Have
Display control system. A display control method for displaying a display screen on a plurality of sink terminals,
Displaying the display screen on the display unit of the source terminal;
Transmitting the display screen displayed on the display unit to the plurality of sink terminals, and causing the plurality of sink terminals to display the display screen;
Selecting any of the plurality of sink terminals;
Receiving from the sink terminal screen data corresponding to the display screen displayed on the selected sink terminal at the source terminal;
A step of switching a display screen displayed on the display unit, the display screen corresponding to the screen data received,
Among the screen data and the plurality of sink terminals corresponding to the display screen displayed on the display unit, and transmitted to the sink terminal different from other sink terminal selected, step of displaying to the other sink terminal When,
A display control method comprising:

Images