JP2015191169A - Display system and image display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display system and an image display method that can simply use a touch panel function when an external device gets connected to a display device.SOLUTION: When image data is input into a display device 10 from an external device 30 and a touch panel 12 detects a contact position, a communication unit 15 transmits the image data and contact position data to a control device 20. When a communication unit 21 of the control device 20 receives the image data and the contact position data from the display device 10, an image processing unit 22b applies image processing based on the contact position data to the received image data. When an image transmission unit 23 transmits the image-processed image data to the display device 10, an image receiving unit 16 of the display device 10 receives the image data. A control unit 18 has a display unit 11 display an image based on the image data received by the image receiving unit 16.

Description

  The present invention relates to a display system and an image display method including a display device having a relatively large display screen such as an electronic blackboard, and a control device for controlling the display device.

  A display device with a relatively large display screen, represented by an electronic whiteboard or electronic blackboard, can display information to a large number of participants in a meeting place or school lesson. The number of introductions at companies and schools is increasing due to its high functionality compared to blackboards and blackboards.

  Such a display device forms a display system together with the control device, displays still images and moving images stored in the control device, displays materials created with presentation software, and inputs characters by handwriting on the touch panel. It has functions such as

  The display device can be connected to a device other than the control device as an external device. For example, a PC (personal computer) can be connected and used as a display of the PC.

  However, when an external device is connected, the display device functions only as a display of the external device, and the touch panel does not function. This is because the display device itself cannot process the position information detected by the touch panel, but is performed by the control device.

  In the PC image distribution facility described in Patent Document 1, image data output from a PC is distributed from a transmitter to a receiver in each display area, and the receiver calibrates coordinate data of a touch panel in the display area to coordinate data. And transmit to the PC via the transmitter.

JP 2009-199477 A

  To use a touch panel when an external device is connected, a program for causing the external device to function as a touch panel is installed in advance, and the external device receives position information detected by the touch panel from the display device, and the external device processes it. Need to do.

  Therefore, whenever the external device to be connected to the display device changes, the touch panel program must be installed in the external device. Since the user does not know what external device is connected, it is difficult to check whether the program operates normally in the external device to be connected, and there is a possibility that a problem of not operating normally occurs. is there. Depending on the external device, the touch panel program may not be installed in the first place.

  An object of the present invention is to provide a display system and an image display method capable of easily using a touch panel function when an external device is connected to a display device.

The present invention is a display system including a display device and a control device capable of data communication with each other,
The display device
A display unit having a display surface for displaying an image;
A touch panel provided on the display surface, the touch panel detecting a contact position when an object contacts the touch panel;
An external input unit for inputting image data from an external device;
A data transmission unit that transmits image data input to the external input unit and contact position data indicating a contact position detected by the touch panel to the control device;
An image receiving unit for receiving image data from the control device;
A display control unit that displays an image based on the image data received by the image receiving unit on a display surface of the display unit,
The controller is
A data receiving unit for receiving image data and contact position data from the data transmitting unit of the display device;
An image processing unit that performs image processing based on the contact position data received by the data receiving unit on the image data received by the data receiving unit;
An image transmission unit that transmits image data subjected to the image processing to the display device.

  Further, the invention is characterized in that the image processing is scaling processing for the image data.

  In the invention, it is preferable that the image processing is drawing processing for drawing a locus of the contact position data.

  The control device may further include an image storage unit that stores at least one of the image data received by the data receiving unit and the image data subjected to the image processing.

The present invention is also an image display method executed by a display system including a display device and a control device capable of data communication with each other,
A data transmission step in which the display device transmits image data input to an external input unit of the display device and contact position data indicating a contact position detected by a touch panel of the display device to the control device;
A data receiving step in which the control device receives image data and contact position data from the display device;
An image processing step in which the control device performs image processing based on the contact position data received in the data reception step on the image data received in the data reception step;
An image transmission step in which the control device transmits the image data subjected to the image processing to the display device;
An image receiving step in which the display device receives image data from the control device;
A display step in which the display device includes a display step of displaying an image based on the image data received in the image transmission step on a display unit of the display device.

  According to the present invention, when image data is input from the external device to the display device, the data transmission unit transmits the input image data and contact position data indicating the contact position detected by the touch panel to the control device. . When the data reception unit of the control device receives the image data and the contact position data from the data transmission unit of the display device, the image processing unit adds the contact position received by the data reception unit to the image data received by the data reception unit. Perform image processing based on the data. When the image transmission unit transmits the image data subjected to the image processing to the display device, the image reception unit of the display device receives the image data. The display control unit displays an image based on the image data received by the image receiving unit on the display surface of the display unit.

  Accordingly, the touch panel function can be easily used simply by inputting an image from the external device to the display device without installing a program in the external device.

  Further, according to the present invention, a scaling process can be performed on the image data as the image processing.

  According to the present invention, the image processing can be a drawing process for drawing a locus of contact position data.

  According to the invention, the image storage unit of the control device stores at least one of the image data received by the data receiving unit and the image data subjected to the image processing.

  Thereby, stored image data can be used, such as redisplaying the image data.

  According to the invention, the display device transmits the input image data and contact position data indicating the contact position detected by the touch panel to the control device. When the control device receives image data and contact position data from the display device, the control device performs image processing based on the received contact position data on the received image data. When the control device transmits the image data subjected to the image processing to the display device, the display device receives the image data. The display device displays an image based on the received image data on the display unit.

  Accordingly, the touch panel function can be easily used simply by inputting an image from the external device to the display device without installing a program in the external device.

It is a block diagram which shows the structure of the electronic blackboard system 1 which is 1st Embodiment of this invention. It is a flowchart which shows the process of the display apparatus 10 in an external input mode. It is a flowchart which shows the process of the control apparatus 20 in an external input mode. It is the schematic which shows the 1st embodiment at the time of external input mode operation | movement of the electronic blackboard system. It is the schematic which shows the 2nd embodiment at the time of external input mode operation | movement of the electronic blackboard system. It is the schematic which shows the 3rd embodiment at the time of external input mode operation | movement of the electronic blackboard system.

<First Embodiment>
FIG. 1 is a block diagram showing a configuration of an electronic blackboard system 1 according to the first embodiment of the present invention. The electronic blackboard system 1 is a display system including a display device 10 and a control device 20. An external device 30 is connected to the display device 10, and image data is input from the external device 30 to the display device 10. Based on the image data input from the external device 30, an image is displayed on the display unit 11 of the display device 10. Further, image data is input from the control device 20 to the display device 10, and an image is displayed on the display unit 11 of the display device 10 based on the image data input from the control device 20.

  The display device 10 includes a touch panel 12, and the user touches the touch panel 12 to input handwritten characters, enlarge the image, or reduce the image displayed on the display unit 11. Intuitive operation is possible.

  Since the user's contact position on the touch panel 12 is sent to the control device 20, operations such as inputting handwritten characters as described above are possible for image data input from the control device 20 to the display device 10. However, since the image data input from the external device 30 is displayed as an image on the display unit 11 as it is, an operation using the touch panel 12 cannot be performed. Therefore, in the present invention, image data input from the external device 30 is captured and the captured image data is transmitted to the control device 20. Since the touch position of the touch panel 12 is sent to the control device 20, the control device 20 inputs handwritten characters and scales the image based on the image data transmitted from the display device 10 and the touch position data of the touch panel 12. Processing can be performed.

  The display device 10 includes a display unit 11, a touch panel 12, a capture unit 13, an operation unit 14, a communication unit 15, an image reception unit 16, a storage unit 17, and a control unit 18.

  The display unit 11 has a display surface for displaying an image, and is realized by a liquid crystal display or an organic electroluminescence display. The screen size of the display unit 11 is relatively large as an electronic blackboard system, for example, 60 inches to 80 inches, but may be smaller or larger than this size.

  The touch panel 12 is disposed so as to overlap the display surface of the display unit 11 and detects the contact position of the display surface by the user. The touch position detection method using the touch panel 12 may be any method as long as it can detect which position on the display surface the user has touched.

  The capture unit 13 is an external input unit that is connected to the external device 30 and captures image data transmitted from the external device 30. In the capture mode, the image data is sent to the communication unit 15 for transmission to the control device 20, and in the non-capture mode, the image data is sent to the control unit 18 for displaying an image on the display unit 11.

  The capture mode is an operation mode in which the operation by the touch panel 12 can be reflected on the image data input from the external device 30. In the non-capture mode, the image data input from the external device 30 is conventionally used. This is an operation mode in which an operation based on the touch panel 12 is not reflected simply by displaying an image based on the display unit 11.

  Whether the display device 10 operates in the capture mode or non-capture mode is determined by the user inputting a mode switching instruction. The mode switching input method is not particularly limited, and a switching key may be assigned to the operation unit 14 or may be input by a soft key using the touch panel 12.

  The operation unit 14 includes a plurality of hard keys for inputting information such as characters, numbers, and symbols. When operated by the user such as being pressed, the operation unit 14 sends information pre-assigned to the operated key to the control unit 18.

  The communication unit 15 is a data transmission unit that performs data communication with the control device 20 and transmits the image data captured by the capture unit 13 and contact position data indicating the contact position detected by the touch panel 12 to the control device 20. .

  As the data communication method, any method may be used as long as necessary data can be transmitted and received between the display device 10 and the control device 20. Data transmission / reception between the display device 10 and the control device 20 may be a wired method or a wireless method. For example, USB (Universal Serial Bus) and RS232C (Recommended Standard 232 C) can be cited as wired methods for data transmission and reception. Further, for example, as the above-described data transmission / reception wireless system, there are a Wi-Fi (Wireless Fidelity) system, a Bluetooth (registered trademark) system, and an NFC (Near field communication) system.

  The image receiving unit 16 receives image data transmitted from the control device 20. The image data received by the image receiving unit 16 is image data that has been subjected to image processing by the control device 20 based on the contact position data. An image is displayed on the display unit 11 based on the image data received by the image receiving unit 16.

  The storage unit 17 is a control program for the control unit 18 to control the operation of the display device 10 as well as various application programs used in the display device 10, image data, calculation data to be temporarily stored, setting data, and the like. Store the data. The storage unit 17 includes, for example, a random access memory (RAM) that is a volatile storage device, and a read only memory (ROM) that is a nonvolatile storage device.

  The control unit 18 is a display control unit that performs operation control of the display device 10 such as image display based on various programs such as a control program stored in the storage unit 17.

  The control device 20 includes a communication unit 21, a control unit 22, an image transmission unit 23, a storage unit 24, and an operation unit 25.

  The communication unit 21 is a data receiving unit that performs data communication with the communication unit 15 of the display device 10 and receives image data and contact position data captured from the display device 10. The communication system and the like may be the same specifications as the communication unit 15.

  The control unit 22 controls the operation of the control device 20, and in the present invention, the control unit 22 is transmitted from the position information processing unit 22a and the display device 10 which perform a predetermined process based on the contact position data transmitted from the display device 10. And an image processing unit 22b that performs image processing on the received image data.

  In the control unit 22, the image transmission unit 23 transmits image data on which image processing based on the contact position data has been performed by the position information processing unit 22a and the image processing unit 22b to the display device 10.

  The storage unit 24 stores various data such as an application program used in the control device 20, arithmetic data to be temporarily stored, and setting data, in addition to a control program for the control unit 22 to control the operation of the control device 20. . The storage unit 17 includes, for example, a RAM that is a volatile storage device and a ROM that is a nonvolatile storage device.

  The storage unit 24 stores image data generated by the control program or application program, and also stores captured image data received from the display device 10 by the communication unit 21 and image data subjected to image processing by the control unit 22. You may keep it. The stored image data can be displayed on the display unit 11 of the display device 10 after the user calls it.

  The operation unit 25 is realized by an input device such as a keyboard or a mouse, and is operated by a user to input a command, a set value, or the like to the control unit 22.

  The main operation mode of the electronic blackboard system 1 is the electronic blackboard mode. In the electronic blackboard mode, the image transmission unit 23 transmits the image data generated by the control device 20 to the display device 10 in a state where the external device 30 is not connected to the display device, and the image reception unit 16 of the display device 10 The control unit 18 causes the display unit 11 to display the received image data. On the other hand, on the touch panel 12, a contact position such as a touch pen or a user's finger is detected, and the communication unit 15 transmits contact position data indicating the detected contact position to the control device 20. When the communication unit 21 of the control device 20 receives the contact position data, the position information processing unit 22a analyzes the received contact position data and determines the operation content of the user.

  Examples of user operations include single tap, double tap, flick, drag, long press, pinch in, and pinch out. These can be determined based on the change direction and length of the locus of the contact position, the time from the start of contact to the end of contact, based on the contact position data.

  The image processing unit 22b performs image processing associated with the user operation content interpreted by the position information processing unit 22a in advance on the image data.

  For example, if the user's operation content interpreted based on the contact position data is pinch-in, the image data of the displayed image is reduced, and if it is pinch-out, the displayed image of the displayed image Enlargement processing is performed on the image data. In addition, when the user's operation is a drag, the displayed position of the displayed image is moved in parallel, or when the soft key is displayed and single-tapped, it is assigned to the soft key. Execute the process.

  Further, when executing the handwriting input process, the operation content is not determined, and when the contact position data changes, the locus is drawn.

  The image data subjected to the image processing by the image processing unit 22b is transmitted from the image transmission unit 23 to the display device 10. In the display device 10, the image receiving unit 16 receives the image processed image data transmitted from the control device 20 and sends it to the control unit 18. The control unit 18 displays an image based on the image processed image data on the display surface of the display unit 11.

  In this way, in the electronic blackboard mode, the contact position detected by the touch panel 12 is transmitted from the display device 10 to the control device 20, and image processing corresponding to the contact position is performed from the control device 20 to the display device 10. By transmitting the image data, it is possible to scale the image displayed using the touch panel 12 and to input characters and figures by handwriting.

  As an operation mode different from the electronic blackboard mode, there is an external input mode when the external device 30 is connected. The external input mode further includes the aforementioned capture mode and non-capture mode.

  When the external device 30 is connected to the display device 10, the display device 10 normally operates in the non-capture mode. In the non-capture mode, the display device 10 only operates as a mere display of the external device 30. Therefore, the capture unit 13 does not capture the image data input from the external device 30 and sends it to the control unit 18 as it is, and the control unit 18 appropriately converts the data so that it can be displayed on the display unit 11. Thus, an image is displayed on the display unit 11. When operating in the non-capture mode, the operation of the touch panel 12 may be stopped, and when not stopped, the detected position information may not be transmitted to the control device 20.

  When it is desired to reflect the operation content on the touch panel 12 on the image displayed based on the image data input from the external device 30, the display device 10 is operated in the capture mode.

  In the capture mode, the capture unit 13 captures image data input from the external device 30 and transmits the image data to the control device 20 via the communication unit 15. At this time, the control unit 18 does not send image data from the capture unit 13 but sends only to the communication unit 15. In the capture mode, the touch panel 12 is operated, and contact position data indicating the contact position detected by the touch panel 12 is transmitted to the control device 20 via the communication unit 15. The transmission of the image data and the transmission of the contact position data may be synchronized and transmitted at the same timing, or may be asynchronously transmitted independently.

  In the control device 20, the communication unit 21 receives the image data and the contact position data transmitted from the display device 10, and the position information processing unit 22a analyzes the received contact position data to determine the operation content of the user. .

  The image processing unit 22b performs image processing previously associated with the user operation content interpreted by the position information processing unit 22a on the image data received from the display device 10 by the communication unit 21. About the operation content and image processing, it is the same as said electronic blackboard mode.

  The control device 20 transmits the image data subjected to the image processing by the image processing unit 22b to the display device 10 via the image transmission unit 23. In the display device 10, the image receiving unit 16 receives the image processed image data transmitted from the control device 20, and the control unit 18 displays an image based on the image processed image data on the display surface of the display unit 11. Let

  As described above, in the capture mode, the image data input from the external device 30 and the contact position data indicating the contact position detected by the touch panel 12 are transmitted from the display device 10 to the control device 20 and displayed from the control device 20. The image data received from the display device 10 is subjected to image processing based on the contact position data and transmitted to the device 10, and the image processed image data is transmitted to the device 10 from the external device 30. The image based on the image data can be scaled by using the touch panel 12, and characters or figures can be input by handwriting.

  In the capture mode, even when a program for using the touch panel is not installed in the external device 30, it is easy to connect the external device to the display device by a process executed by the display device 10 and the control device 20. The touch panel function can be used.

  FIG. 2 is a flowchart showing processing of the display device 10 in the external input mode. This flow is started when the state in which the external device 30 is connected to the external input terminal of the display device 10 is detected. If the external device 30 is not connected to the external input terminal of the display device 10, the electronic blackboard system 1 operates in the electronic blackboard mode.

  In step A <b> 1, it is determined whether image data is input from the external device 30 to the capture unit 13. If it is input, the process proceeds to step A2, and if it is not input, the process waits. Even if an electrical signal is physically input from the external device 30, the image data is encrypted by HDCP (High-bandwidth Digital Content Protection), or high-resolution image data exceeding the capability of the display device 10. May be determined in step A1 that no image data has been input.

  In step A2, it is determined whether a capture mode start instruction has been issued. The start instruction is input to the display device 10 by a user operation such as a user pressing a key assigned to the operation unit 14 of the display device 10 or a user touching the assigned soft key. When the start instruction is made, the operation is performed in the capture mode and the process proceeds to Step A3. When the capture mode start instruction has not been issued, the operation is performed in the non-capture mode, and the process proceeds to Step A8. In the non-capture mode, an image based on the image data input from the external device 30 to the capture unit 13 is displayed on the display unit 11 in step A8.

  In step A3, the capture unit 13 captures image data input from the external device 30, and in step A4, the touch panel 12 detects the contact position. In this flowchart, the touch panel 12 detects the contact position after the capture unit 13 captures the image data. However, the capture of the image data and the detection of the contact position are not limited to this order, and whichever comes first. Or simultaneously.

  In step A5, the image data captured by the capture unit 13 and the contact position data indicating the contact position detected by the touch panel 12 are transmitted from the communication unit 15 to the control device 20. In step A 6, image processed image data obtained by performing image processing on the image data transmitted to the control device 20 is sent from the control device 20, and is received by the image receiving unit 16. In step A7, an image based on the image processed image data received by the image receiving unit 16 is displayed on the display unit 11.

  In step A5, the data format of the image data transmitted from the communication unit 15 to the control device 20 may be any data format for displaying an image, such as binary data or bitmap data.

  FIG. 3 is a flowchart showing processing of the control device 20 in the capture mode. The control device 20 operates as follows in the capture mode and does not operate in the non-capture mode. The operation in the capture mode may be notified from the display device 10 to the control device 20 after step A3 and before step A5, or the control device 20 sends image data from the display device 10. You may make it recognize that it is a capture mode, when receiving.

  Further, the position information processing unit 22a and the image processing unit 22b in the control unit 22 are realized by an application program (control application).

  In step B1, it is determined whether or not the communication unit 21 has received image data and contact position data from the display device 10. If received, the process proceeds to step B2, and if not received, the process waits. In step B2, it is determined whether or not the control application is activated. If it is activated, the process proceeds to step B4. If it is not activated, the control application is activated in step B3.

  In step B4, the received image data is output on the control device 20 by the control application and expanded so that it can be handled in the same manner as the image data generated by the control device 20. In step B5, the received contact position data is analyzed, and the operation content of the user operating the touch panel 12 is determined. In step B6, image processing associated with the operation content determined in step B5 in advance is performed on the developed image data. In step B 7, the image processed image data is transmitted from the image transmission unit 23 to the display device 10. The image processed image data transmitted in step B7 is the image processed image data received by the image receiving unit 16 of the display device 10 in step A6 in FIG.

  FIG. 4 is a schematic diagram showing a first embodiment during the external input mode operation of the electronic blackboard system 1. In this embodiment, a PC is connected to the display device 10 as the external device 30, and the display device 10 and the control device 20 are connected.

  A video output terminal of the PC and an external input terminal of the display device 10 are connected by a cable, and image data displayed on a PC monitor or the like is input to the display device 10. In the display device 10, when the user touches the touch panel 12 using the touch pen 19 or the like, the contact position is detected.

  The display device 10 and the control device 20 are connected to each other by a cable that transmits data from the display device 10 to the control device 20 and a cable that transmits data from the control device 20 to the display device 10. When the image data and the contact position data input from the PC are transmitted from the display device 10 to the control device 20, the control device 20 performs image processing on the image data, and the processed image data is sent to the display device 10. Send. The display device 10 displays an image based on the image data received from the control device 20 on the display unit 11.

  In the example shown in FIG. 4, a locus handwritten with the touch pen 19 on the image output from the PC is displayed on the display device 10.

  Even if a program for using the touch panel 12 is not installed in the PC that is the external device 30, the touch panel 12 of the display device 10 can be used only by connecting the cable to the display device 10.

  FIG. 5 is a schematic diagram showing a second embodiment during the external input mode operation of the electronic blackboard system 1. In this embodiment, a PC is connected to the display device 10 as the external device 30, and the display device 10 and the control device 20 are connected.

  A video output terminal of the PC and an external input terminal of the display device 10 are connected by a cable, and image data displayed on a PC monitor or the like is input to the display device 10. In the display device 10, when the user touches the touch panel 12 using the touch pen 19 or the like, the contact position is detected.

  The display device 10 and the control device 20 are connected to each other by a cable that transmits data from the display device 10 to the control device 20 and a cable that transmits data from the control device 20 to the display device 10. When the image data and the contact position data input from the PC are transmitted from the display device 10 to the control device 20, the control device 20 performs image processing on the image data, and the processed image data is converted into the control device 20. The processed image data is transmitted to the display device 10 by superimposing the processed image data embedded in the image data generated by the control device 20 on the image generated by the control device 20. The display device 10 displays the image data generated by the control device 20 based on the image data received from the control device 20 and the processed image data on the display unit 11 as one image.

  In the example illustrated in FIG. 5, a locus handwritten with the touch pen 19 on an image obtained by combining the image generated by the control device 20 and the image output from the PC is displayed on the display device 10.

  Even if a program for using the touch panel 12 is not installed in the PC that is the external device 30, the touch panel 12 of the display device 10 can be used only by connecting the cable to the display device 10.

  FIG. 6 is a schematic diagram showing a third embodiment during the external input mode operation of the electronic blackboard system 1. In this embodiment, a DVD player is connected to the display device 10 as the external device 30, and the display device 10 and the control device 20 are connected.

  The video output terminal of the DVD player and the external input terminal of the display device 10 are connected by a cable, and the reproduced image data of the DVD is input to the display device 10. In the display device 10, when the user touches the touch panel 12 using the touch pen 19 or the like, the contact position is detected.

  The display device 10 and the control device 20 are connected to each other by a cable that transmits data from the display device 10 to the control device 20 and a cable that transmits data from the control device 20 to the display device 10. When image data and contact position data input from a DVD player are transmitted from the display device 10 to the control device 20, the control device 20 performs image processing on the image data, and the processed image data is sent to the display device 10. Send. The display device 10 displays an image based on the image data received from the control device 20 on the display unit 11.

  In the example shown in FIG. 6, a locus handwritten with a touch pen 19 on a playback image of a DVD is displayed on the display device 10.

  In a device that does not have versatility and expandability, such as a PC such as a DVD player, which is the external device 30, there are many cases where a program for using the touch panel 12 cannot be installed. Ten touch panels 12 can be used.

Second Embodiment
In the first embodiment, the configuration has been described in which the external input mode when the external device 30 is connected to the display device 10 selectively operates in the capture mode and the non-capture mode. In the second embodiment, the display device 10 does not operate as the external input mode as the non-capture mode, but operates only in the capture mode.

  In the present embodiment, since the display device 10 always operates in the capture mode in the external input mode, the user does not need to perform an operation for starting the capture mode. Specifically, when it is detected that the external device 30 is connected to the external terminal of the display device 10, the operation in the capture mode is started as the external input mode. When the external device 30 is not connected to the external terminal of the display device 10, the electronic blackboard mode is operated.

  Since it is not necessary to determine whether to start the capture mode as a flowchart showing the processing of the display device 10 in the present embodiment, step A3 and subsequent steps in the flowchart of the first embodiment shown in FIG. Detailed description will be omitted. The flowchart showing the processing of the control device 20 in the present embodiment is the same as the flowchart shown in FIG.

<Third Embodiment>
The present invention can also be implemented as an image display method, and the third embodiment is an image display method executed by the electronic blackboard system 1 described above. By installing a software program in each of the display device and the control device provided with the touch panel, the image display method shown in the flowcharts of FIGS. 2 and 3 can be performed even as the display device 10 and the control device 20 of the electronic blackboard system 1. Can be implemented. The image display method of the present embodiment is not limited to the hardware configuration of the display device 10 and the control device 20 described above, and may be any hardware configuration that can execute the flowcharts of FIGS.

DESCRIPTION OF SYMBOLS 1 Electronic blackboard system 10 Display apparatus 11 Display part 12 Touch panel 13 Capture part 14 Operation part 15 Communication part 16 Image receiving part 17 Memory | storage part 18 Control part 19 Touch pen 20 Control apparatus 21 Communication part 22 Control part 22a Position information processing part 22b Image processing Unit 23 image transmission unit 24 storage unit 25 operation unit 30 external device

Claims (5)

A display system including a display device and a control device capable of data communication with each other,
The display device
A display unit having a display surface for displaying an image;
A touch panel provided on the display surface, the touch panel detecting a contact position when an object contacts the touch panel;
An external input unit for inputting image data from an external device;
A data transmission unit that transmits image data input to the external input unit and contact position data indicating a contact position detected by the touch panel to the control device;
An image receiving unit for receiving image data from the control device;
A display control unit that displays an image based on the image data received by the image receiving unit on a display surface of the display unit,
The controller is
A data receiving unit for receiving image data and contact position data from the data transmitting unit of the display device;
An image processing unit that performs image processing based on the contact position data received by the data receiving unit on the image data received by the data receiving unit;
An image transmission unit configured to transmit the image data subjected to the image processing to the display device;   The display system according to claim 1, wherein the image processing is scaling processing for the image data.   The display system according to claim 1, wherein the image processing is drawing processing for drawing a locus of the contact position data.   4. The control device according to claim 1, further comprising an image storage unit that stores at least one of the image data received by the data receiving unit and the image data subjected to the image processing. The display system according to one. An image display method executed by a display system including a display device and a control device capable of data communication with each other,
A data transmission step in which the display device transmits image data input to an external input unit of the display device and contact position data indicating a contact position detected by a touch panel of the display device to the control device;
A data receiving step in which the control device receives image data and contact position data from the display device;
An image processing step in which the control device performs image processing based on the contact position data received in the data reception step on the image data received in the data reception step;
An image transmission step in which the control device transmits the image data subjected to the image processing to the display device;
An image receiving step in which the display device receives image data from the control device;
An image display method comprising: a display step in which the display device displays an image based on the image data received in the image transmission step on a display unit of the display device.