JP7806564B2 - Display device and program - Google Patents

Description

The present invention relates to a display device and a program.

Display devices such as electronic whiteboards are known, where a user writes strokes on a touch panel display or other device using an input means such as a dedicated electronic pen or their hand, and handwritten data formed by several strokes is displayed. For example, Patent Document 1 discloses a technology in which a user writes something using a writing medium that disappears after a certain period of time, and then the image is captured by a camera and drawn on the display device.

However, with conventional technology, in a mode in which the display of data entered by the user is erased after a certain period of time has passed, in order for the data to continue to be displayed after the certain period of time has passed, the user had to switch modes before entering data.

In consideration of the above-mentioned problems, an embodiment of the present invention aims to enable the display of data entered by a user even after a certain period of time has passed, in a mode in which the display of data entered by a user is erased after a certain period of time has passed, by user operation.

In order to solve the above-mentioned problems, the present invention comprises an operation reception unit that receives input of data to be displayed by a user, a judgment unit that judges whether or not an operation has been performed by the user to change the write mode of data input in a temporary write mode that erases the display of the data after a certain time has elapsed since the input of the data to a fixed write mode that does not erase the display of the data, and a display control unit that automatically displays a write confirmation button for changing the write mode, wherein the judgment unit judges whether or not to change the write mode based on whether or not the press of the write confirmation button has been received within a predetermined time after the input of the data, and the display control unit switches the display of the data from display in the temporary write mode to display in the fixed write mode when the judgment unit judges that an operation to change the write mode has been performed.

According to an embodiment of the present invention, in a mode in which the display of data entered by a user is erased after a certain period of time has elapsed, the data can be displayed even after a certain period of time has elapsed by user operation after the data has been entered.

FIG. 1 is a diagram showing an example of a schematic diagram of a display system according to an embodiment of the present invention. FIG. 1 is a diagram illustrating an example of a hardware configuration of a display device according to an embodiment of the present invention. FIG. 1 is a diagram showing an example of a configuration diagram of functional blocks of a display device according to an embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a write confirmation button according to an embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a sequence relating to a display process of a write confirmation button according to an embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a display screen in a display process of a write confirmation button according to an embodiment of the present invention. FIG. 10 is a diagram illustrating an example of a sequence relating to a second display process of the write confirmation button according to the embodiment of the present invention. FIG. 10 is a diagram showing an example of a display screen in a second display process of the write confirmation button according to the embodiment of the present invention. FIG. 10 is a diagram showing an example of a sequence relating to a data display process in an asynchronous write mode according to an embodiment of the present invention. FIG. 10 is a diagram showing an example of a sequence relating to a data display process in a synchronized write mode according to an embodiment of the present invention.

Embodiments of a display device and program according to the present invention will be described in detail below with reference to the accompanying drawings.

[First embodiment]
<System Overview>
FIG. 1 is a schematic diagram illustrating an example of a display system according to an embodiment of the present invention. The display system 1 includes display devices 2 (2a, 2b) connected to a communication network 4, such as the Internet, and a server device 3. The display device 2 is a system for conducting remote conferences and the like between the display devices 2a and 2b. Conference materials and the like can be displayed on the display device 2, and a user can draw by hand on the display device 2 using an input device such as an electronic pen or their hand. A stroke is a series of actions in which a user presses an input device, such as an electronic pen or their hand, against the display, moves it continuously, and then lifts it from the display device. A stroke is information displayed on the display based on a trajectory of coordinates input by the input device. Handwritten data (or written or drawn) by a user, which includes one or more strokes, is called handwritten data. The handwritten data entered by the user on the display device 2a is transmitted to the server device 3 via the communication network 4. The server device 3 transmits the received handwritten data to the display device 2b, which then displays the received handwritten data on its display, allowing the handwritten data to be simultaneously viewed between remote conference locations. In addition, there are two writing modes in which a user can input data to a display: temporary writing mode and fixed writing mode. In temporary writing mode (which may also be called marker mode), the written data disappears after a predetermined period of time and is not saved. On the other hand, in fixed writing mode (which may also be called pen mode or fixed writing mode), the written data remains displayed and is saved. Here, writing data that disappears after a predetermined period of time, such as that written in temporary writing mode, is called temporary writing data, and writing data that does not disappear even after a predetermined period of time, such as that written in fixed writing mode, is called fixed writing data. However, fixed writing mode and fixed writing data are not necessarily saved at the end of a conference, and mean that the display does not disappear after a certain period of time. Therefore, "fixed writing" may also be called "fixed writing,""fixed writing display,""long-term writing display," etc. Writing modes may be synchronized so that the same writing mode is used among multiple display devices 2 connected to the communication network 4 in the display system 1, or may be asynchronous (not synchronized).

In an embodiment of the present invention, the display device 2 is capable of displaying write data entered by a user in temporary write mode even after a certain period of time has passed. To achieve this, for example, when a user enters write data, the display device 2 displays a write confirmation button near the write data for a predetermined period of time. Furthermore, when the display device 2 detects that the user has pressed the write confirmation button, it converts the write data from temporary write data to confirmed write data, thereby preventing the display from being erased even after a certain period of time has passed.

Note that the system configuration of the display system 1 shown in Figure 1 is one example. In Figure 1, the display system 1 includes two display devices 2, but the display system 1 may include any number of display devices 2 (including one). Alternatively, the server device 3 may not exist, and multiple display devices 2 may communicate directly, or a single display device 2 may exist independently. Furthermore, the communication network 4 may include a connection section via wireless communication such as mobile communication or wireless LAN.

<Hardware configuration example>
2 is a diagram showing an example of a hardware configuration of a display device 2 according to an embodiment of the present invention. As shown in Fig. 2, the display device 2 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, an SSD (Solid State Drive) 204, a network I/F 205, and an external device connection I/F (Interface) 206.

Of these, the CPU 201 controls the overall operation of the display device 2. The ROM 202 stores the CPU 201 and programs used to drive the CPU 201, such as the IPL (Initial Program Loader). The RAM 203 is used as a work area for the CPU 201. The SSD 204 stores various data, such as programs for the display device. The network controller 205 controls communication with the communication network 4. The external device connection I/F 206 is an interface for connecting various external devices. In this case, external devices include, for example, a USB (Universal Serial Bus) memory 230 and external devices (a mouse 220, a microphone 240, a speaker 250, and a camera 260).

The display device 2 also includes a capture device 211, a GPU 212, a display controller 213, a contact sensor 214, a sensor controller 215, an electronic pen controller 216, a short-range communication circuit 219, an antenna 219a for the short-range communication circuit 219, a power switch 222, and selection switches 223.

Of these, the capture device 211 displays video information as still images or moving images on the display of an external PC (Personal Computer) 270. The GPU (Graphics Processing Unit) 212 is a semiconductor chip that specializes in graphics. The display controller 213 controls and manages the screen display to output the output image from the GPU 212 to the display 280, etc. The contact sensor 214 detects contact with the electronic pen 290, the user's hand H, etc. on the display 280. The sensor controller 215 controls the processing of the contact sensor 214. The contact sensor 214 inputs and detects coordinates using an infrared blocking method. The coordinates are input and detected by two light-emitting/receiving devices installed at both ends of the upper side of the display 280, which emit multiple infrared rays parallel to the display 280. The light is reflected by a reflecting member provided around the display 280 and receives the returning light along the same optical path as the light emitted by the light-receiving element. The contact sensor 214 outputs the IDs of the infrared rays emitted by the two light-emitting/receiving devices that are blocked by an object to the sensor controller 215, which then identifies the coordinate position, which is the contact position of the object. The electronic pen controller 216 communicates with the electronic pen 290 to determine whether the pen tip or the pen tail has touched the display 280. The near-field communication circuit 219 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark). The power switch 222 is a switch for turning the power of the display device 2 ON/OFF. The selection switches 223 are, for example, a group of switches for adjusting the brightness and color of the display 280.

The display device 2 further includes a bus line 210. The bus line 210 is an address bus, a data bus, etc., for electrically connecting the various components, such as the CPU 201, shown in FIG. 2.

The contact sensor 214 is not limited to an infrared blocking type, and various detection means may be used, such as a capacitive touch panel that identifies the contact position by detecting changes in capacitance, a resistive film touch panel that identifies the contact position by voltage changes across two opposing resistive films, or an electromagnetic induction touch panel that identifies the contact position by detecting electromagnetic induction caused by an object touching the display unit. Furthermore, the electronic pen controller 216 may determine whether or not the part of the electronic pen 290 that the user grips or other parts of the electronic pen have been touched, in addition to the tip and butt of the electronic pen 290.

<About the function>
3 is a diagram showing an example of a configuration diagram of functional blocks in the display device 2 according to an embodiment of the present invention. The display device 2 has an operation reception unit 10, a display control unit 11, a determination unit 12, a communication unit 13, and a control unit 14. Each of these units is a function or means realized by the CPU 201 executing instructions included in one or more programs installed in the display device 2.

The operation reception unit 10 receives operations such as character input and button presses by the user via a contact sensor 214 that detects contact of the electronic pen 290, the user's hand H, etc. with the display 280 of the display device 2.

The display control unit 11 displays the writing data entered by the user, or a writing confirmation button for switching the writing data from temporary writing data to confirmed writing data, etc., on the display 280 of the display device 2.

The determination unit 12 determines whether a user operation (e.g., pressing the write confirmation button) has been performed to switch the write data from temporary write data to confirmed write data. The determination unit 12 also determines whether to display the write confirmation button based on the current write mode and the status of the user's input of write data. For example, when the write mode is temporary write mode and the user first inputs write data, the determination unit 12 determines that the write confirmation button should be displayed and requests the display control unit 11 to display the write confirmation button. The determination unit 12 also determines whether to erase the display of the write data and the write confirmation button if N seconds (a predetermined period of time) have passed since the user last inputted the write data without inputting write data or pressing the write confirmation button.

The communication unit 13 is a communication function possessed by the display device 2, and transmits and receives information to and from other server devices 3 or display devices 2, etc. via the communication network 4.

The control unit 14 controls the switching of the write mode. For example, when the write confirmation button is pressed, the control unit 14 switches the write mode from the temporary write mode to the confirmed write mode.

<Write confirmation button>
4 is a diagram showing an example of a write confirmation button according to an embodiment of the present invention. In the display area 122 of the display screen 100 displayed on the display device 2 shown in FIG. 4, writing data 101 to 104, writing data areas 105 and 106, and writing confirmation buttons 107 to 109 are displayed.

Written data 101-104 is handwritten data entered by the user on the display of the display device 2 using an input means such as an electronic pen or a hand.

Written data areas 105 and 106 are rectangular areas with the smallest area, each containing a group of written data within a predetermined distance, with each side parallel to the sides of display area 122. In Figure 4, written data areas 105 and 106 correspond to grouped written data 101 and 102, and written data 103 and 104, respectively.

The write confirmation buttons 107-109 are used to allow the user to continue displaying the written data entered in temporary writing mode after a certain period of time has passed. It is possible to display a write confirmation button for each written data item (i.e., display multiple write confirmation buttons). Alternatively, it is possible to display a single write confirmation button corresponding to all written data items in the display area 122, or a single write confirmation button corresponding to written data items in a pre-specified area within the display area 122. When displaying a write confirmation button for each written data item, the write confirmation button is displayed at a fixed distance from the written data area. In Figure 4, the write confirmation button 107 is displayed at a fixed distance in the upper left corner from the written data area 105, and the write confirmation button 108 is displayed at a fixed distance in the lower right corner from the written data area 106. Furthermore, the write confirmation button 109 corresponding to all written data items in the display area 122 is displayed at the fixed distance in the upper right corner within the display area 122. Furthermore, after the write confirmation button is pressed, the display may be erased or may continue to be displayed. Furthermore, after the write confirmation button is pressed, the write mode may be switched from temporary write mode to confirmed write mode. Furthermore, if the write confirmation button is left visible rather than erased after pressing, the write mode may be switched between confirmed write mode and temporary write mode, and the write data may be switched between temporary write data and confirmed write data each time the write confirmation button is pressed.

<Writing confirmation process for writing data>
FIG. 5 is a diagram showing an example of a sequence related to the display process of the write confirmation button according to an embodiment of the present invention. In this sequence, in temporary write mode, the display device 2 displays the write confirmation button when the user inputs write data. If N seconds have passed since the last input of write data without the user pressing the write confirmation button, the display device 2 erases the write data and the write confirmation button. Furthermore, if the user presses the write confirmation button within N seconds after inputting the write data, the display device 2 changes the temporary write data to the confirmed write data. FIG. 6 is a diagram showing an example of a display screen in the display process of the write confirmation button according to an embodiment of the present invention, showing the display screen displayed on the display device 2 in this sequence. Below, the processing of each step in FIG. 5 will be described with reference to the display screen of FIG. 6.

Step S20: The operation reception unit 10 of the display device 2 receives handwritten data written by the user on the display of the display device 2 using an input means such as a hand or an electronic pen, and transmits the received handwritten data to the judgment unit 12 of the display device 2 as operation information.

Step S21: Because the writing mode is temporary writing mode and the write confirmation button is not displayed, the judgment unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the writing data and the write confirmation button.

Step S22: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the writing data 111 and the writing confirmation button 112 as shown on the display screen 110 in Figure 6.

Step S23: Similar to the process in step S20, the operation reception unit 10 of the display device 2 receives new writing data from the user and transmits the received writing data as operation information to the judgment unit 12 of the display device 2.

Step S24: Because the writing mode is temporary writing mode and the write confirmation button 112 is already displayed, the judgment unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the newly accepted writing data.

Step S25: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 further displays the writing data 114 as shown on the display screen 113 in Figure 6.

Step S26: The operation reception unit 10 of the display device 2 receives new writing data from the user and transmits the received writing data as operation information to the judgment unit 12 of the display device 2.

Step S27: Because the writing mode is temporary writing mode and the write confirmation button 112 is already displayed, the judgment unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the newly accepted writing data.

Step S28: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 further displays the writing data 116 as shown on the display screen 115 in Figure 6.

Step S29: The judgment unit 12 of the display device 2 detects that no new writing data has been input or the writing confirmation button 112 has been pressed within N seconds since the last writing data was accepted. Here, N is a predetermined period of time, for example, N=10. Based on this detection result, the judgment unit 12 sends a message to the display control unit 11 requesting the deletion of the displayed writing data 111, 114, 116 and the writing confirmation button 112.

Step S30: Based on the request message received from the judgment unit 12, the display control unit 11 of the display device 2 erases the display of the writing data 111, 114, 116 and the writing confirmation button 112.

Step S31: The operation reception unit 10 of the display device 2 receives new writing data from the user and transmits the received writing data as operation information to the judgment unit 12 of the display device 2.

Step S32: Because the writing mode is temporary writing mode and the write confirmation button is not displayed, the judgment unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the writing data and the write confirmation button.

Step S33: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the writing data 118 and the writing confirmation button 119 as shown on the display screen 117 in Figure 6.

Step S34: The operation reception unit 10 of the display device 2 receives the user pressing the write confirmation button 119 and transmits this as operation information to the judgment unit 12 of the display device 2.

Step S35: The judgment unit 12 of the display device 2 detects that the write confirmation button 112 has been pressed within N seconds since the last time the writing data was received. Based on this detection result, the judgment unit 12 displays the displayed writing data 118 as confirmed writing data, and sends a message to the display control unit 11 requesting that the write confirmation button 119 be deleted.

Step S36: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the displayed writing data 118 as confirmed writing data and erases the display of the write confirmation button 119. For example, the display control unit 11 may delete the writing data 118 displayed as temporary writing data, and then write the writing data 118 as confirmed writing data. The display control unit 11 may also change the color, thickness, transparency, etc. of the stroke in the writing data 118 newly written as confirmed writing data so that it is clear that the writing data 118 has been changed from temporary writing data to confirmed writing data. The determination unit 12 of the display device 2 may also change the writing mode to confirmed writing mode after detecting the press of the write confirmation button, and treat the writing data by the user as confirmed writing data.

Through the above process, the display device 2 displays the write confirmation button when the user inputs write data (temporary write data) in temporary write mode (marker mode). Furthermore, if the display device 2 detects that the write confirmation button has been pressed within a predetermined period of time after the user last inputs temporary write data, it can change the displayed temporary write data to confirmed write data. In other words, in a mode in which the display of data input by the user is erased after a certain period of time has elapsed, the display device 2 can display the input data even after a certain period of time has elapsed after the data has been input.

<Second Write Confirmation Process of Write Data>
Fig. 7 is a diagram showing an example of a sequence relating to a second display process of the write confirmation button according to an embodiment of the present invention. In this sequence, a display process different from the process shown in Fig. 5 will be described with respect to the process relating to the display of the write confirmation button. Fig. 8 is a diagram showing an example of a display screen in the second display process of the write confirmation button according to an embodiment of the present invention, and shows a display screen displayed on the display device 2 in this sequence. The process of each step in Fig. 7 will be described below together with the display screen in Fig. 8.

Step S40: Similar to the processing of step S20 in FIG. 5, the operation reception unit 10 of the display device 2 receives data written by the user and transmits the received data written as operation information to the determination unit 12 of the display device 2.

Step S41: The determination unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the writing data. Unlike the processing of step S21 in Figure 5, the determination unit 12 does not request the display of a writing confirmation button at this point.

Step S42: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the writing data 131 as shown on the display screen 130 in Figure 8.

Step S43: The operation reception unit 10 of the display device 2 receives new writing data from the user and transmits the received writing data as operation information to the judgment unit 12 of the display device 2.

Step S44: The determination unit 12 of the display device 2 sends a message to the display control unit 11 requesting the display of the written data.

Step S45: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the writing data 133 as shown on the display screen 132 in Figure 8.

Step S46: The judgment unit 12 of the display device 2 detects that no new input of write data has been accepted within N seconds since the last accepted write data. Here, N is a predetermined fixed time, for example, N = 10. Based on this detection result, the judgment unit 12 sends a message to the display control unit 11 requesting the display of a write confirmation button.

Step S47: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the write confirmation button 135 as shown on the display screen 134 in Figure 8.

Step S48: The operation reception unit 10 of the display device 2 receives new writing data from the user and transmits the received writing data as operation information to the judgment unit 12 of the display device 2.

Step S49: The judgment unit 12 of the display device 2 detects that new input of writing data has been accepted before M seconds have elapsed since the writing confirmation button was displayed. Here, M is a predetermined fixed time, for example, M = 10. Based on this detection result, the judgment unit 12 sends a message to the display control unit 11 requesting the display of the writing data and the deletion of the writing confirmation button 135.

Step S50: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the writing data 137 and erases the writing confirmation button 135, as shown on the display screen 136 in Figure 8.

Step S51: Similar to the processing in step S46, the display control unit 11 of the display device 2 detects that no new input of writing data has been received within N seconds since the last time writing data was received. Based on this detection result, the determination unit 12 sends a message to the display control unit 11 requesting the display of a writing confirmation button.

Step S52: Based on the request message received from the determination unit 12, the display control unit 11 of the display device 2 displays the write confirmation button 139 as shown on the display screen 138 in Figure 8.

Step S53: The judgment unit 12 of the display device 2 detects that no new writing data has been input or the writing confirmation button 139 has been pressed within M seconds since the writing confirmation button was displayed. Based on this detection result, the judgment unit 12 sends a message to the display control unit 11 requesting that the displayed writing data 131, 133, 137 and the writing confirmation button 139 be erased.

Step S54: Based on the request message received from the judgment unit 12, the display control unit 11 of the display device 2 erases the displayed writing data 131, 133, 137 and the writing confirmation button 139.

Through the above processing, if the display device 2 does not detect the input of new write data for N seconds after the user inputs temporary write data in temporary write mode (marker mode), it displays the write confirmation button. Furthermore, if the display device 2 does not input new temporary write data or press the write confirmation button for M seconds, it erases the display of all temporary write data and the write confirmation button. Note that in this sequence, as with the processing shown in Figure 5, the display device 2 can change the displayed temporary write data to confirmed write data when it receives a press of the write confirmation button. In other words, in a mode in which the display of data entered by the user is erased after a certain period of time has elapsed, the display device 2 can display the entered data even after a certain period of time has elapsed.

<Write confirmation process when write mode is asynchronous>
9 is a diagram showing an example of a sequence relating to data display processing when the write mode is asynchronous according to an embodiment of the present invention. This sequence describes processing when the write mode is not synchronized between the display devices 2 at each location (here, between the display devices 2a and 2b at two locations, as an example) when a conference or the like is held between locations via the server device 3. The processing of each step in FIG. 9 is described below.

Step S60: Similar to the process shown in step S20 of Figure 5, the operation reception unit 10 of the display device 2a receives handwritten data written by the user on the display of the display device 2 using an input means such as a hand or an electronic pen in temporary writing mode (marker mode).

Step S61: The display control unit 11 of the display device 2a displays the temporary write data and the write confirmation button, similar to the processing shown in step S22 of FIG. 5. In this sequence, the description of the processing related to the display of the confirm write button by the determination unit 12 will be omitted, but the display control unit 11 displays the write confirmation button based on the processing of the determination unit 12.

Step S62: The communication unit 13 of the display device 2a sends a message to the server device 3 requesting the display of the temporary writing data. The request message includes information about the temporary writing data (display position, stroke color, thickness, transparency, etc.).

Step S63: The server device 3 transmits the received request message to the communication unit 13 of the display device 2b.

Step S64: The display control unit 11 of the display device 2b displays the temporary write data based on the received request message.

Step S65: The operation reception unit 10 of the display device 2a detects that the user has pressed the write confirmation button.

Step S66: The display control unit 11 of the display device 2a erases the display of the temporary write data and the write confirmation button.

Step S67: The communication unit 13 of the display device 2a sends a message to the server device 3 requesting the deletion of the temporarily written data.

Step S68: The server device 3 transmits the received request message to the communication unit 13 of the display device 2b.

Step S69: The display control unit 11 of the display device 2b erases the display of the temporary writing data.

Step S70: The display control unit 11 of the display device 2a displays the temporary writing data erased in step S66 as confirmed writing data (which will not be erased even after a certain period of time has passed). Here, to show that the temporary writing data has been changed to confirmed writing data, the color, thickness, transparency, etc. of the stroke in the confirmed writing data may be specified to be different from the information in the temporary writing data displayed in step S61.

Step S71: The communication unit 13 of the display device 2 sends a message to the server device 3 requesting the display of the confirmed write data. The request message includes information about the confirmed write data (display position, stroke color, thickness, transparency, etc.).

Step S72: The server device 3 transmits the received request message to the communication unit 13 of the display device 2b.

Step S73: The display control unit 11 of the display device 2b displays the confirmed write data (which will not be erased even after a certain period of time has passed) based on the received request message.

By performing the above process, when the write mode is not synchronized between the display devices 2 at each location, the display device 2 can display the entered data in temporary write mode even after a certain period of time has passed since the data was entered. Similarly, when there are three or more display devices 2, the server device 3 similarly transmits the request message to all display devices 2 other than the display device 2 from which it received the request message.

<Write confirmation process when write mode is synchronized>
10 is a diagram showing an example of a sequence related to data display processing when write modes are synchronized according to an embodiment of the present invention. This sequence describes processing when write modes are synchronized between display devices 2 at each location (here, as an example, between display devices 2a and 2b at two locations) when a conference or the like is held between locations via a server device 3. The processing of each step in FIG. 10 will be described below, focusing on differences from the processing in FIG. 9.

At the start, the writing mode of display device 2a and display device 2b is temporary writing mode (marker mode). Steps S75 to S88 execute the same processing as steps S60 to S73 in Figure 9.

Step S89: The control unit 14 of the display device 2a switches the write mode from temporary write mode to fixed write mode.

Step S90: The communication unit 13 of the display device 2a sends a message to the server device 3 requesting that the write mode be switched from temporary write mode to final write mode.

Step S91: The server device 3 transmits the received request message to the communication unit 13 of the display device 2b.

Step S92: The control unit 14 of the display device 2b switches the write mode from temporary write mode to fixed write mode. At this point, the write mode changes from temporary write mode to fixed write mode on both the display device 2a and the display device 2b.

Step S93: In the final write mode (pen mode), the operation reception unit 10 of the display device 2a receives handwritten data written by the user on the display of the display device 2 using an input means such as a hand or an electronic pen.

Step S94: The display control unit 11 of the display device 2a displays the confirmed write data.

Step S95: The communication unit 13 of the display device 2a sends a message to the server device 3 requesting the display of the confirmed write data. The request message includes information about the confirmed write data (display position, stroke color, thickness, transparency, etc.).

Step S96: The server device 3 transmits the received request message to the communication unit 13 of the display device 2b.

Step S97: The display control unit 11 of the display device 2b displays the confirmed write data based on the received request message.

By performing the above process, when the write mode is synchronized between display devices 2 at each location, the display device 2 can display the entered data in temporary write mode even after a certain period of time has passed since the data was entered. Similarly, if there are three or more display devices 2, the server device 3 will similarly send a request message to all display devices 2 other than the display device 2 from which it received the request message.

<Modification>
As a modified example, the operation of pressing the final write button may be performed by voice recognition using voice input by the user from the microphone 240 of the display device 2, or by clicking the mouse 220 of the display device 2. Alternatively, switching between the temporary write data and the final write data, or switching between the write modes, may be performed by an operation other than pressing the final write button. For example, switching between the temporary write data and the final write data, or switching between the write modes, may be performed by a gesture operation (a predetermined specific operation) via the contact sensor 214 using the electronic pen 290 or the user's hand H, or by voice recognition using the input voice described above, a gesture operation using a mouse, or the like.

As a variation of FIG. 9 or FIG. 10, on display device 2b, for example, a confirm write button may be displayed in addition to the temporary write data in steps S62 to S64 of FIG. 9, and the display of the confirm write button may be erased in steps S67 to S69 of FIG. 9. Furthermore, separate from the input of write data by a user on display device 2a, another user on display device 2b may simultaneously input write data; in this case, a confirm write button may be displayed for the write data of each user, or a common confirm write button may be displayed for the write data of all users.

Although several embodiments for implementing the present invention have been described above, the present invention is in no way limited to these embodiments, and various modifications and substitutions can be made without departing from the spirit and scope of the present invention.

For example, the example functional block diagram in Figure 3 is divided according to main functions to make it easier to understand the processing by display system 1 and display device 2. The method of dividing the processing units or their names does not limit the present invention. The processing in display system 1 and display device 2 can also be divided into even more processing units depending on the processing content. It can also be divided so that one processing unit includes even more processes.

Furthermore, each function of the embodiments described above can be realized by one or more processing circuits. Here, the term "processing circuit" in this specification includes processors programmed to perform each function by software, such as processors implemented in electronic circuits, as well as devices such as ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), FPGAs (Field Programmable Gate Arrays), and conventional circuit modules designed to perform each of the functions described above.

Furthermore, the described devices represent only one of several computing environments for implementing the embodiments disclosed herein. In one embodiment, display system 1 and display device 2 include multiple computing devices, such as a server cluster. The multiple computing devices are configured to communicate with each other via any type of communication link, including a network, shared memory, etc., and to perform the processing disclosed herein.

REFERENCE SIGNS LIST 1 display system 2 display device 3 server device 4 communication network 10 operation reception unit 11 display control unit 12 determination unit 13 communication unit 14 control unit

Patent No. 5906922

Claims (9)

an operation receiving unit that receives input of data to be displayed by a user;
a determination unit that determines whether or not the user has performed an operation to change the write mode to a fixed write mode in which the display of the data is not erased, for data that has been input in a temporary write mode in which the display of the data is erased after a certain time has elapsed since the input of the data;
a display control unit that automatically displays a write confirmation button for changing the write mode;
and
the determination unit determines whether to change the write mode based on whether pressing of the write confirmation button has been accepted within a predetermined time after the data has been input;
The display control unit switches the display of the data from the temporary write mode to the fixed write mode when the judgment unit determines that an operation to change the write mode has been performed. The display device according to claim 1 , wherein the display control unit displays the write confirmation button when the user first inputs the data while the write mode is the temporary write mode and the write confirmation button is not displayed. The display device according to claim 1 , wherein the display control unit displays a plurality of the write confirmation buttons corresponding to a plurality of the data. The display device according to claim 1 , wherein the display control unit displays one of the write confirmation buttons for a plurality of the data displayed within a predetermined range. The display device according to claim 1 , wherein the display control unit displays the write confirmation button for each of the users who input the data. The display device according to claim 1 , wherein the display control unit displays one write confirmation button for each of the data input by the user. The display device according to claim 1, wherein the display control unit displays the data in such a way that at least one of color, thickness, and transparency differs between the display in the temporary writing mode and the display in the fixed writing mode. The display device according to claim 1, wherein the operation reception unit receives a voice operation or a mouse operation from the user as the operation by which the determination unit changes the writing mode. an operation receiving unit step of receiving input of data to be displayed by a user;
a determination step of determining whether or not the user has performed an operation to change the write mode to a fixed write mode in which the display of the data is not erased, for data input in a temporary write mode in which the display of the data is erased after a certain time has elapsed since the input of the data;
a display control step of automatically displaying a write confirmation button for changing the write mode ;
A program for causing a display device to execute the above,
the determining step determines whether to change the write mode based on whether pressing of the write confirmation button is accepted within a predetermined time after the data is input,
The display control step is a program for switching the display of the data from the temporary write mode to the fixed write mode when it is determined in the determination step that an operation to change the write mode has been performed.