Control method of display device, display device and control method of image processing device

Abstract

A control method for a display device, and a control method for a display device and an image processing device. An image can be easily displayed even when the maximum number of split screens is reached. The control method for a display device includes: obtaining a plurality of first images from a plurality of first terminals; displaying a first screen in which the plurality of first images are arranged by a display device; storing the maximum number of first images arranged on the first screen by a storage circuit; displaying the second image in response to a request from a second terminal providing a second image, and allowing the second terminal to display a second screen including the second image but not including the first image through the display device when the number of the first images arranged on the first screen is the maximum number; and allowing the second terminal to arrange the second image on the first screen when the number of the first images arranged on the first screen is less than the maximum number.

Description

Technical Field

[0001] The present invention relates to a control method of a display device, a control method of a display device and an image processing device. Background Art

[0002] Patent Document 1 discloses a display device having a structure in which the entire image projected on the screen is changed by dragging and dropping an icon of a terminal device to a separate image arrangement area composed of four display target areas.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2012-32508 Summary of the invention

[0004] Problems to be solved by the invention

[0005] However, in the technology described in Patent Document 1, when new individual images are to be displayed while the same number of individual images as the number of display target areas are being displayed, the individual images being displayed need to be replaced with the new individual images, which complicates the user's operation.

[0006] Means of solving the problem

[0007] One method is a control method for a display device, comprising: obtaining multiple first images from multiple first terminals; displaying a first screen on which the multiple first images are arranged by a display device; storing a maximum number of first images that can be arranged on the first screen by a storage circuit; displaying the second image in response to a signal requesting from a second terminal that provides a second image, and allowing the second terminal to display a second screen that includes the second image but does not include the first image through the display device when the number of the first images arranged on the first screen is the maximum number; and allowing the second terminal to arrange the second image on the first screen when the number of the first images arranged on the first screen is less than the maximum number.

[0008] Another embodiment is a display device, comprising: a communication circuit, which obtains multiple first images from multiple first terminals; a display device, which displays a first screen on which the multiple first images are arranged; a storage circuit, which stores the maximum number of first images that can be arranged on the first screen; and a processing circuit, which displays a signal of the second image based on a request from a second terminal that provides the second image, and when the number of the first images arranged on the first screen is the maximum number, allows the second terminal to display a second screen containing the second image but not the first image on the display device, and when the number of the first images arranged on the first screen is less than the maximum number, allows the second terminal to arrange the second image on the first screen.

[0009] Another method is a control method for an image processing device, comprising: obtaining multiple first images from multiple first terminals; sending a first screen on which the multiple first images are arranged to a display device; storing the maximum number of first images that can be arranged on the first screen by a storage circuit; displaying the second image in response to a request from a second terminal that provides a second image, and allowing the second terminal to display a second screen that includes the second image but does not include the first image through the display device when the number of the first images arranged in the first screen is the maximum number; and allowing the second terminal to arrange the second image on the first screen when the number of the first images arranged on the first screen is less than the maximum number. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram for explaining a display system according to an embodiment.

[0011] Figure 2 It is a block diagram illustrating a display system according to an embodiment.

[0012] Figure 3 This is a diagram for explaining an example of an operation screen.

[0013] Figure 4 This is a diagram for explaining another example of the operation screen.

[0014] Figure 5 This is a diagram for explaining another example of the operation screen.

[0015] Figure 6 This is a diagram for explaining an example of the first screen.

[0016] Figure 7 This is a diagram for explaining another example of the operation screen.

[0017] Figure 8 This is a diagram for explaining another example of the first screen.

[0018] Fig. 9 This is a diagram for explaining another example of the first screen.

[0019] Fig.10 This is a diagram for explaining another example of the operation screen.

[0020] Fig.11 This is a diagram for explaining an example of the second screen.

[0021] Fig.12 This is a flowchart illustrating a method for controlling a display device according to an embodiment.

[0022] Description of symbols

[0023] 1 display system; 10 terminal; 10A to 10D first terminal; 10x second terminal; 11 communication unit; 12 control circuit; 13 input unit; 14 display unit; 20 display device; 21 input device; 22 controller; 23 processing circuit; 24 storage circuit; 25 communication circuit; 26 display device; 30 screen; 40 image; 50 operation screen; 51 first button; 52 second button; 53 third button; 61 first screen; 62 second screen. DETAILED DESCRIPTION

[0024] Hereinafter, the embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same or similar elements are sometimes marked with the same or similar symbols, and repeated descriptions are omitted. The embodiments shown below illustrate a system for implementing the technical idea of ​​the present invention, and a device or method used in the system. The technical idea of ​​the present invention does not specify the type and structure of each device, the network topology, a series of processing, etc. as the following.

[0025] like Figure 1 As shown in FIG. 1 , the display system 1 of the embodiment includes a plurality of first terminals 10A, 10B, 10C, 10D, a second terminal 10x, and a display device 20. Figure 1 In the example shown, the display device 20 is a projector that displays an image 40 by projecting light onto a screen 30. The display device 20 may also be another display device such as a flat panel display device. Flat panel display devices include, for example, liquid crystal display devices, plasma display devices, organic electroluminescent display devices, and the like.

[0026] The plurality of first terminals 10A to 10D and the second terminal 10x are computer devices each having a function of providing image data representing an image to the display device 20. Hereinafter, any one of the plurality of first terminals 10A to 10D and the second terminal 10x will be referred to as a "terminal 10" unless otherwise specified. Figure 1 In the example shown, each terminal 10 is a smartphone, but each terminal 10 may also be another computer device such as a tablet terminal, a laptop computer, or a desktop computer.

[0027] like Figure 2 As shown, the display device 20 includes, for example, an input device 21, a controller 22, a communication circuit 25, and a display device 26. The input device 21 receives a user's operation and outputs a signal corresponding to the user's operation to the controller 22. The input device 21 can be, for example, various input devices such as buttons, touch sensors, and pointing devices. In addition, the input device 21 can include a wireless or wired remote controller.

[0028] The controller 22 has a processing circuit 23 and a storage circuit 24. The processing circuit 23 constitutes a processing device of a computer that processes operations required for the operation of the display device 20. The processing circuit 23 realizes various functions of the display device 20 described in the embodiment by, for example, executing a control program stored in the storage circuit 24. As a processing device constituting at least a part of the processing circuit 23, various logic operation circuits such as a central processing unit (CPU), a digital signal processor (DSP), a programmable logic device (PLD), and an application-specific integrated circuit (ASIC) can be used. The processing circuit 23 can be composed of an integrated hardware or a plurality of separate hardware.

[0029] The storage circuit 24 is a computer-readable storage medium that stores a control program and various data representing a series of processes required for the operation of the display device 20. The storage circuit 24 can be, for example, a semiconductor memory. The storage circuit 24 is not limited to a non-volatile auxiliary storage device, and may also include a volatile main storage device such as a register or a cache memory. At least a part of the storage circuit 24 may also be composed of a part of the processing circuit 23. The storage circuit 24 may be composed of an integrated hardware or a plurality of separate hardware.

[0030] The communication circuit 25 establishes a communication link with the terminal 10 according to the control of the processing circuit 23, thereby being connected to the terminal 10 in a communicative manner. The communication link may be wired or wireless, or a combination of wired or wireless. That is, the communication circuit 25 may be directly connected to the terminal 10, or may be indirectly connected to the terminal via other communication devices. The communication circuit 25 may include, for example, an antenna for transmitting and receiving signals, a circuit for processing signals transmitted in the communication link, and a socket into which a plug of a communication cable is inserted. The communication circuit 25 receives image data sent from the terminal 10.

[0031] The display device 26 includes, for example, a light source; a display element such as a liquid crystal panel having a plurality of pixels; and an optical system including a lens, a reflector, etc. The processing circuit 23 generates a drive signal for driving the display element based on the image data received from the terminal 10 by the communication circuit 25. The display element modulates the light emitted from the light source based on the drive signal. The display device 26 projects the light passing through the display element onto the screen 30 using the optical system under the control of the processing circuit 23, thereby displaying an image 40 based on the image data. In this way, the display device 26 can display the image obtained from the terminal 10.

[0032] The terminal 10 includes a communication unit 11, a control circuit 12, an input unit 13, and a display unit 14. The communication unit 11 is a communication interface that establishes a communication link with the display device 20 under the control of the control circuit 12, thereby being communicatively connected to the display device 20. The communication unit 11 may include, for example, an antenna for transmitting and receiving wireless signals, a socket into which a plug of a communication cable is inserted, a circuit for processing signals transmitted in the communication link, etc. The communication unit 11 transmits image data representing an image to the display device 20 under the control of the control circuit 12.

[0033] The control circuit 12 includes a processing device such as a CPU and a storage device such as a semiconductor memory. The control circuit 12 processes operations required for the operation of the terminal 10. The control circuit 12 implements various functions of the terminal 10 described in the embodiment by, for example, executing a program stored in the storage device. The storage device of the control circuit 12 stores, for example, a series of processing programs and various data required for the operation of the terminal 10. The control circuit 12 may be composed of an integrated hardware or a plurality of separate hardware.

[0034] The input unit 13 is an input device that receives user operations and outputs signals corresponding to the user operations to the control circuit 12. The input unit 13 may include, for example, a keyboard, various switches, and a pointing device. The display unit 14 may be, for example, a flat panel display. The input unit 13 and the display unit 14 may also be touch panel displays that are integrally formed with each other.

[0035] The first terminals 10A to 10D each transmit image data representing the first image to the display device 20, thereby providing the first image to the display device 20. The second terminal 10x transmits image data representing the second image to the display device 20, thereby providing the second image to the display device 20. Each terminal 10 transmits a request signal requesting display of an image to be provided to the display device 20 to the display device 20 in response to a user operation on the input unit 13. The display device 20 permits the terminal 10 to display an image in response to the request signal transmitted from the terminal 10.

[0036] For example, it is assumed that the first terminal 10A requests the display device 20, which has not yet displayed any image of the terminal 10, to display the first image. The control circuit 12 of the first terminal 10A transmits a request signal for requesting the display of the first image to the display device 20 via the communication unit 11 in response to the user's operation on the input unit 13. The display device 20 allows the first terminal 10A to display the first screen consisting of one first image in response to the request signal. However, the first screen has a function of a so-called split screen in which a plurality of first images are arranged.

[0037] Specifically, the processing circuit 23 of the display device 20 reads the maximum number of images arranged on the first screen from the storage circuit 24 according to the request signal. Therefore, the storage circuit 24 stores the maximum number of images arranged on the first screen in advance. For example, when the images are arranged in a 2×2 matrix on the first screen, the maximum number is 4. The processing circuit 23 determines whether the number of first images currently arranged on the first screen is the maximum number of images arranged on the first screen. When the number of first images arranged on the first screen is less than the maximum number, the processing circuit 23 sends a permission signal for allowing the display of the first image to the first terminal 10A via the communication circuit 25. That is, when the display device 20 does not display the image of any terminal 10, the number of first images is 0, so the permission signal is sent to the first terminal 10A.

[0038] like Figure 3 As shown, the control circuit 12 of the first terminal 10A displays an operation screen 50 including a first button 51 indicating "Participate in the maximum form" and a second button 52 indicating "Participate" on the display unit 14 according to the permission signal. Figure 3 In the example shown, the operation screen 50 indicates that the operation on the first button 51 is invalid by, for example, being grayed out. When the control circuit 12 detects the operation on the second button 52 in response to the user's operation on the input unit 13, the control circuit 12 sends an instruction signal for instructing to arrange the first image on the first screen and image data representing the first image to the display device 20.

[0039] The processing circuit 23 of the display device 20 generates a first screen composed of one first image according to the instruction signal instructing the arrangement of the first images, and displays the first screen as a video 40 via the display device 26. When the image displayed by the display device 20 is only the first image obtained from the first terminal 10A, the first image is displayed in full screen by the display device 26. That is, the first image of the first terminal 10A is displayed in a maximized state by the display device 26.

[0040] In this case, if Figure 4 As shown, the control circuit 12 of the first terminal 10A displays, for example, an operation screen 50 including the disabled first button 51 and the third button 53 displayed as "Exit" on the display unit 14. When the control circuit 12 detects the operation of the third button 53 in accordance with the operation of the input unit 13 by the user, it transmits an instruction signal for instructing to stop the display of the provided first image to the display device 20. The processing circuit 23 of the display device 20 stops the generation of the first screen composed of one first image and stops the display of the first screen in the display device 26 according to the instruction signal for instructing to stop the display of the first image.

[0041] Here, it is assumed that in a state where the display device 20 displays only the first image of the first terminal 10A, the other first terminal 10B requests to display the first image of the first terminal 10B. The control circuit 12 of the first terminal 10B transmits a request signal for requesting to display the first image to the display device 20 via the communication unit 11 in accordance with the operation of the input unit 13 by the user. In accordance with the request signal, the display device 20 allows the first terminal 10B to arrange the first image of the first terminal 10B on the first screen and allows to display the second screen composed of the first image of the first terminal 10B. The second screen is a screen different from the first screen, for example, and is displayed in full screen in a manner overlapping with the first screen. For example, the second screen has the same size as the first screen in the image 40 displayed by the display device 26. The second screen is processed by the processing circuit 23 as a layer different from the first screen, for example.

[0042] Specifically, the processing circuit 23 of the display device 20 determines whether the number of the first images currently arranged on the first screen is the maximum number of images arranged on the first screen according to the request signal. When the number of the first images arranged on the first screen is less than the maximum number, the processing circuit 23 sends a permission signal to the first terminal 10A, and the permission signal allows the first image of the first terminal 10B to be arranged on the first screen, and allows the second screen composed of the first image of the first terminal 10B to be displayed. That is, when the number of the first images is 1 and the maximum number is 4, the display device 20 allows the first terminal 10B to arrange the first image of the first terminal 10B on the first screen, and allows the second screen composed of the first image of the first terminal 10B to be displayed. As a result, the first terminal 10B can perform any one of the processing of arranging the first image on the first screen or displaying the second screen composed of the first image.

[0043] like Figure 5 As shown, the control circuit 12 of the first terminal 10B displays the operation screen 50 including the first button 51 displayed as "Participate in the maximized form" and the second button 52 displayed as "Participate" on the display unit 14 according to the permission signal. When the control circuit 12 detects the operation of the first button 51 according to the operation of the input unit 13 by the user, it transmits the instruction signal for instructing to display the second screen composed of the first image and the image data representing the first image to the display device 20. The processing circuit 23 of the display device 20 generates the second screen composed of the first image of the first terminal 10B according to the instruction signal for instructing to display the second screen, and displays the second screen as the image 40 through the display device 26. That is, the first image of the first terminal 10B is displayed in a maximized state by the display device 26.

[0044] On the other hand, when the control circuit 12 of the first terminal 10B detects the operation of the second button 52 in response to the user's operation of the input unit 13 , it transmits an instruction signal for instructing to arrange the first image on the first screen and image data representing the first image to the display device 20 .

[0045] like Figure 6 As shown, the processing circuit 23 of the display device 20 generates a first screen 61 in which two first images obtained from the first terminal 10A and the first terminal 10B are arranged according to an instruction signal instructing arrangement on the first screen, and displays the first screen 61 as an image 40 through the display device 26.

[0046] In this case, if Figure 7 As shown in FIG. 1 , each control circuit 12 of the first terminal 10A and the first terminal 10B displays the operation screen 50 including the first button 51 and the third button 53 on the display unit 14. When the control circuit 12 detects the operation of the first button 51 according to the operation of the input unit 13 by the user, it transmits an instruction signal for instructing to display the second screen composed of the supplied first image to the display device 20. The processing circuit 23 of the display device 20 generates the second screen composed of one first image according to the instruction signal for instructing to display the second image, and displays the second screen through the display device 26.

[0047] On the other hand, when the control circuit 12 detects the operation of the third button 53 in accordance with the user's operation of the input unit 13, it transmits an instruction signal for instructing to delete the supplied first image from the first screen 61 to the display device 20. The processing circuit 23 of the display device 20 deletes the supplied first image from the first screen 61 on which the two first images are arranged, according to the instruction signal for instructing to delete the first image. As a result, the display device 26 displays the first screen consisting of the remaining one first image.

[0048] Here, it is assumed that the display device 20 displays Figure 6 In the state of the first screen 61 of the first terminal 10C, another first terminal 10C requests to display the first image of the first terminal 10C. The control circuit 12 of the first terminal 10C transmits a request signal for requesting the display of the first image to the display device 20 in response to the user's operation on the input unit 13. The display device 20 permits the first terminal 10C to arrange the first image of the first terminal 10C on the first screen 61 and to display the second screen consisting of the first image of the first terminal 10C in response to the request signal.

[0049] Specifically, the processing circuit 23 of the display device 20 determines whether the number of first images currently arranged on the first screen 61 is the maximum number of images arranged on the first screen 61 based on the request signal. When the number of first images arranged on the first screen 61 is less than the maximum number, the processing circuit 23 sends a permission signal to the first terminal 10C, which allows the first image of the first terminal 10C to be arranged on the first screen 61 and allows the second screen composed of the first images of the first terminal 10C to be displayed. When the number of first images is 2 and the maximum number is 4, the display device 20 allows the first terminal 10C to arrange the first image of the first terminal 10C on the first screen 61 and allows the second screen composed of the first images of the first terminal 10C to be displayed.

[0050] In this case, if Figure 5 As shown, the control circuit 12 of the first terminal 10C displays the operation screen 50 including the first button 51 and the second button 52 on the display unit 14 according to the permission signal. When the control circuit 12 detects the operation of the first button 51 according to the operation of the input unit 13 by the user, it transmits the instruction signal for instructing to display the second screen composed of the first image and the image data representing the first image to the display device 20. The processing circuit 23 of the display device 20 generates the second screen composed of the first image of the first terminal 10C according to the instruction signal for instructing to display the second screen, and displays the second screen as the image 40 through the display device 26. That is, the first image of the first terminal 10C is displayed in a maximized state by the display device 26.

[0051] On the other hand, when the control circuit 12 of the first terminal 10C detects the operation of the second button 52 in response to the user's operation of the input unit 13 , it transmits an instruction signal for instructing to arrange the first image on the first screen 61 and image data representing the first image to the display device 20 .

[0052] like Figure 8 As shown, the processing circuit 23 of the display device 20 generates a first screen 61 in which three first images obtained from the first terminal 10A, the first terminal 10B, and the first terminal 10C are arranged according to an instruction signal instructing the arrangement on the first screen 61. The processing circuit 23 displays the generated first screen 61 as the image 40 via the display device 26.

[0053] Furthermore, when another first terminal 10D requests display of the first image of the first terminal 10D, similarly to the above description, the control circuit 12 of the first terminal 10D transmits a request signal for requesting display of the first image to the display device 20 in accordance with the user's operation on the input unit 13. In accordance with the request signal, the display device 20 allows the first terminal 10D to arrange the first image of the first terminal 10D on the first screen 61, and allows display of the second screen consisting of the first image of the first terminal 10D.

[0054] like Figure 5 As shown, the control circuit 12 of the first terminal 10D displays the operation screen 50 including the first button 51 and the second button 52 on the display unit 14 according to the permission signal. When the control circuit 12 detects the operation of the first button 51 according to the operation of the input unit 13 by the user, it transmits the instruction signal for instructing to display the second screen composed of the first image and the image data representing the first image to the display device 20. The processing circuit 23 of the display device 20 generates the second screen composed of the first image of the first terminal 10D according to the instruction signal for instructing to display the second screen, and displays the second screen as the image 40 through the display device 26. That is, the first image of the first terminal 10D is displayed in a maximized state by the display device 26.

[0055] On the other hand, when the control circuit 12 of the first terminal 10D detects the operation of the second button 52 in response to the user's operation on the input unit 13 , it transmits an instruction signal instructing to arrange the first image on the first screen 61 and image data representing the first image to the display device 20 .

[0056] like Fig. 9 As shown, the processing circuit 23 of the display device 20 generates a first screen 61 in which four first images acquired from the first terminal 10A, the first terminal 10B, the first terminal 10C, and the first terminal 10D are arranged according to an instruction signal instructing the arrangement on the first screen 61. The processing circuit 23 displays the generated first screen 61 as the image 40 via the display device 26.

[0057] Here, focusing on the other second terminal 10x, a case where the second terminal 10x requests display of the second image while the display device 20 is displaying the first screen 61 is described. The control circuit 12 of the second terminal 10x transmits a request signal for requesting display of the second image to the display device 20 in response to a user operation on the input unit 13. The display device 20 permits the second terminal 10x to display the second screen including the second image of the second terminal 10x in response to the request signal.

[0058] Specifically, the processing circuit 23 of the display device 20 determines whether the number of first images currently arranged on the first screen 61 is the maximum number of images arranged on the first screen 61 based on the request signal. If the number of first images arranged on the first screen 61 is the maximum number, the processing circuit 23 transmits a permission signal to the second terminal 10x via the communication circuit 25 to allow only the second screen including the second image of the second terminal 10x to be displayed. That is, for example, when displaying Fig. 9 In the state of the first screen 61, when the second terminal 10x sends a request signal, the number of first images is 4 and the maximum number is 4, so the processing circuit 23 allows the second terminal 10x to display the second screen including the second image of the second terminal 10x.

[0059] like Fig.10 As shown, the control circuit 12 of the second terminal 10x displays the operation screen 50 including the first button 51 and the second button 52 on the display unit 14 according to the permission signal. Fig.10 In the example shown, the operation screen 50 indicates that the operation on the second button 52 is invalid by, for example, being grayed out. When the control circuit 12 detects the operation on the first button 51 in response to the user's operation on the input unit 13, the control circuit 12 sends an instruction signal for instructing to display on the second screen including the second image and image data representing the second image to the display device 20.

[0060] like Fig.11 As shown, the processing circuit 23 of the display device 20 generates a second screen 62 composed of one second image according to the instruction signal instructing the display of the second screen, and displays the second screen 62 as the video 40 via the display device 26. That is, the second image of the second terminal 10x is displayed in a maximized state by the display device 26.

[0061] On the other hand, when the number of first images arranged on the first screen 61 is less than the maximum number, the processing circuit 23 of the display device 20 sends a permission signal to the second terminal 10x, which allows the second image of the second terminal 10x to be arranged on the first screen 61 and allows the second screen 62 including the second image of the second terminal 10x to be displayed. Figure 8 In the state of the first screen 61 of the second terminal 10x, when the second terminal 10x sends a request signal, the number of first images is 3 and the maximum number is 4, so the display device 20 allows the second terminal 10x to arrange the second image of the second terminal 10x on the first screen 61 and allows the second screen 62 including the second image of the second terminal 10x to be displayed. As a result, the second terminal 10x can perform any one of arranging the second image on the first screen 61 or displaying the second screen 62 including the second image.

[0062] In this case, if Figure 5 As shown, the control circuit 12 of the second terminal 10x displays the operation screen 50 including the first button 51 and the second button 52 on the display unit 14 according to the permission signal. When the control circuit 12 detects the operation of the first button 51 according to the operation of the input unit 13 by the user, it transmits the instruction signal for instructing to display the second screen 62 composed of the second image and the image data representing the second image to the display device 20. The processing circuit 23 of the display device 20 displays the second screen 62 through the display device 26 according to the instruction signal for instructing to display the second screen 62. Fig.11 The second screen 62 is taken as the image 40.

[0063] On the other hand, when the operation of the second button 52 is detected, the control circuit 12 sends an instruction signal to the display device 20 to instruct the second image to be arranged on the first screen 61. The processing circuit 23 of the display device 20 generates a first screen 61 in which a plurality of first images and a second image are arranged, based on the instruction signal instructing the arrangement of the second image, and displays the generated first screen 61 through the display device 26.

[0064] In addition, while the second screen 62 including the second image of the second terminal 10x is displayed, Figure 4 As shown, the control circuit 12 of the second terminal 10x displays the operation screen 50 including the disabled first button 51 and the operable third button 53 on the display unit 14. When the control circuit 12 detects the operation of the third button 53 in accordance with the operation of the input unit 13 by the user, it transmits an instruction signal for instructing to stop the display of the second screen 62 to the display device 20. The processing circuit 23 of the display device 20 stops the display of the second screen 62 according to the instruction signal for instructing to stop the display of the second screen 62, and displays the first screen 61 in the state before the second screen 62 is displayed. The processing circuit 23 can restore the first screen 61 in the state before the second screen 62 is displayed by, for example, storing the first screen 61 and the second screen 62 as different layers in the storage circuit 24.

[0065] Reference Fig.12 The flowchart of will be used to explain the control method of the display device 20 as an example of the operation of the display system 1 according to the embodiment.

[0066] First, in step S1, the communication circuit 25 of the display device 20 obtains a plurality of first images from the plurality of first terminals 10A to 10D under the control of the processing circuit 23. In step S2, the display device 26 displays a first screen 61 on which the plurality of first images are arranged under the control of the processing circuit 23. In step S3, the processing circuit 23 receives a request signal for requesting display of the second image from the second terminal 10x that supplies the second image via the communication circuit 25.

[0067] In step S4, the processing circuit 23 determines, based on the request signal, whether the number of first images currently arranged on the first screen 61 is the maximum number of images arranged on the first screen 61. The processing circuit 23 advances the processing to step S5 if the number of first images is the maximum number, and advances the processing to step S6 if the number of first images is less than the maximum number.

[0068] In step S5, the processing circuit 23 transmits a permission signal to the second terminal 10x via the communication circuit 25 to allow the second terminal 10x to display the second screen 62. That is, the processing circuit 23 allows the second terminal 10x to display the second screen 62 including the second image of the second terminal 10x via the display device 26. Fig.10 As shown, the second terminal 10 x displays the operation screen 50 for instructing the display device 20 to display the second screen 62 including the second image.

[0069] In step S6, the processing circuit 23 sends a permission signal to the second terminal 10x, which permission signal allows the second image to be arranged on the first screen 61 and allows the second screen 62 to be displayed. That is, the processing circuit 23 allows the second terminal 10x to arrange the second image of the second terminal 10x on the first screen 61 and allows the display device 26 to display the second screen 62 including the second image of the second terminal 10x. Thus, for example, Figure 5 As shown, the second terminal 10 x displays the operation screen 50 for instructing the display device 20 to arrange the second image on the first screen 61 or to display the second screen 62 including the second image.

[0070] According to the display system 1 of the embodiment, when the display of the second image is requested from the second terminal 10x, the display device 20 displays the second screen 62 including the second image when the number of the first images arranged on the first screen 61 is the maximum number that can be arranged on the first screen 61. Thus, even if the number of the first images arranged on the first screen 61 is the maximum number, the display device 20 does not need to perform any operation such as replacement of the displayed first image, and can simply display the second image.

[0071] Furthermore, according to the display system 1 of the embodiment, when the second terminal 10x is instructed to stop displaying the second screen 62, the first screen 61 is displayed in a state immediately before the second screen 62 is displayed. This prevents the image 40 displayed by the display device 26 from being in a state where no image of the terminal 10 is displayed due to the stop of displaying the second screen 62.

[0072] The above embodiments are described, but the present invention is not limited to these disclosures. The structure of each part can be replaced with any structure having the same function. In addition, within the technical scope of the present invention, any structure in each embodiment can be omitted or added. Based on these disclosures, various alternative implementations are obvious to those skilled in the art.

[0073] For example, the size of the second screen 62 in the image 40 may be smaller than the size of the first screen 61. For example, when the first screen 61 including four first images is already displayed, the second screen 62 may be displayed in a manner that replaces any one of the first images. Furthermore, the second screen 62 having a size larger than the size of the first image in the first screen 61 and smaller than the size of the first screen may be displayed in the center of the image 40.

[0074] For example, the controller 22 and the communication circuit 25 of the display device 20 may be provided in a housing separate from the housing of the display device 20. That is, the display system 1 may be composed of an image processing device having a controller functioning as the controller 22 and a communication circuit functioning as the communication circuit 25, and a display device having the function of the display device 26. In this case, it is possible to perform Fig.12 The image processing device in steps S1 to S6 outputs the image data to the display device.

[0075] For example, the maximum number stored in the storage circuit 24 is variable.

[0076] In addition, various embodiments not described above, such as structures in which the above structures are applied to each other, are obviously also included in the present invention. The technical scope of the present invention is determined only by the invention-specific matters of the appropriate claims based on the above description.

Claims

1. A method for controlling a display device, comprising: Acquiring a plurality of first images from a plurality of first terminals; Displaying, by a display device, a first screen on which the plurality of first images are arranged; The storage circuit stores the maximum number of first images that can be arranged on the first screen; In response to a signal requesting display of the second image from a second terminal providing the second image, when the number of the first images arranged in the first screen is the maximum number, allowing the second terminal to display the second screen through the display device, the second screen being a screen different from the first screen and not including the first image but consisting of the second image; When the number of the first images arranged on the first screen is less than the maximum number, the second terminal is permitted to arrange the second image on the first screen.

2. The control method of the display device according to claim 1, wherein: When the number of the first images arranged on the first screen is smaller than the maximum number, the second terminal is permitted to display the second screen by the display device.

3. The control method of the display device according to claim 1 or 2, wherein: The second screen has the same size as the first screen.

4. The control method of the display device according to claim 1 or 2, wherein: include: Displaying the second screen; In response to a signal instructing to stop display of the second screen, display of the second screen is stopped and the first screen in a state immediately before display of the second screen is displayed.

5. A display device comprising: a communication circuit for acquiring a plurality of first images from a plurality of first terminals; A display device that displays a first screen on which the plurality of first images are arranged; a storage circuit storing a maximum number of first images that can be arranged on the first screen; and A processing circuit that displays a signal of the second image in response to a request from a second terminal providing the second image, and that allows the second terminal to display the second image on the display device when the number of the first images arranged on the first image is the maximum number, wherein the second image is a different image from the first image, does not include the first image but is composed of the second image, and allows the second terminal to arrange the second image on the first image when the number of the first images arranged on the first image is less than the maximum number.

6. A method for controlling an image processing device, comprising: Acquiring a plurality of first images from a plurality of first terminals; Sending a first picture on which the plurality of first images are arranged to a display device; The storage circuit stores the maximum number of first images that can be arranged on the first screen; In response to a signal requesting display of the second image from a second terminal providing the second image, when the number of the first images arranged in the first screen is the maximum number, allowing the second terminal to display the second screen through the display device, the second screen being a screen different from the first screen and not including the first image but consisting of the second image; When the number of the first images arranged on the first screen is less than the maximum number, the second terminal is permitted to arrange the second image on the first screen.

Images