JP6510705B2 - Display device, display method, program for display and electronic blackboard - Google Patents

Description

  The present invention relates to a display device for displaying an image on a screen, a display method, a display program, and an electronic blackboard including the display device, and in particular, a display device for displaying contents drawn by a plurality of pens on a screen The present invention relates to a display method and a display program, and an electronic blackboard including the display device.

  A touch panel function has been added to a large-sized liquid crystal display device (hereinafter also referred to as “display”) as a substitute for the conventional white board combined with the magic pen, and a touch pen for drawing (hereinafter simply referred to as “ The pen is sometimes used as an electronic blackboard. In such an electronic blackboard, it is possible to use a display having a touch panel function and a pen to display, as an image, content according to a locus or the like drawn by the pen on the display. Then, by changing the thickness, color, type, and the like of lines assigned to the pens, it is possible to treat one pen as if it were many pens and to create an image of rich expression.

JP, 2011-145763, A JP, 2013-175142, A

  Here, electronic blackboards are often used in school classrooms, meeting rooms at work, etc. In such a use environment, there is a usage pattern in which a plurality of persons draw on electronic blackboards using their own pens. is assumed. However, in the prior art, although it is possible to assign various colors, thicknesses and types to a pen, the pen is only one pen. When it is decided to use one pen repeatedly, each user sets attributes such as color, thickness and type according to the time to the assigned pen, when the pen is assigned to him, Draw on the touch panel with the pen after setting. Even if a plurality of pens are prepared, different pens do not necessarily have attributes such as different colors, thicknesses and types. The same attribute may be assigned to different pens, and in such a case, not only the user but also the device identifies which drawing content displayed on the screen is drawn by which pen. Can not do it. Therefore, even if different pens are assigned to each user, if the same attribute is assigned to different pens, who is the user as well as the apparatus also displays which drawing content is displayed on the screen by whom It can not be identified whether it is drawn. Therefore, it is not possible to switch display and non-display of the drawing content for each pen. If different pens are assigned to each user, it is not possible to switch between display and non-display of drawing contents for each user.

  Moreover, in the conventional electronic blackboard, problems as described below occur.

The first problem will be described with reference to FIG. FIG. 1A shows a state in which “Aiueo” is drawn by the pen 1, “Kakigukeko” is drawn by the pen 2, and “Sashisushiso” is drawn by the pen 3. Here, as shown in FIG. 1 (b), when the screen is wiped with an electronic eraser (for example, a pen having an attribute of eraser) using the eraser function, as shown in FIG. 1 (c). As shown, the drawing within the part where the electronic eraser reaches the wiped path
All are erased. However, for example, it may be required to leave the "stroke" drawn by the pen 2, and such a case can not be coped with.

  The second problem is described with reference to FIG. In FIG. 2A, “Aiueo” is drawn by the pen 1, “Kakibukeko” is drawn by the pen 2, and “Sashisuseso” is drawn by the pen 3. Here, as shown in FIG. 2 (b) and FIG. 2 (c), when the designated area of the screen is erased using the erasing function of the area designation, it is in the area as shown in FIG. 2 (d). The drawing contents are all erased. However, for example, it may be required to leave the "stroke" drawn by the pen 2, and such a case can not be coped with.

  The third problem is described with reference to FIG. In FIG. 3A, “Aiueo” is drawn by the pen 1, “Kakigukeko” is drawn by the pen 2, and “Sashisushiso” is drawn by the pen 3. Here, as shown in FIG. 3 (b), when the entire screen is erased using the function of erasing all of the drawing contents, as shown in FIG. 3 (c), all the drawing contents in the entire screen are erased. Be done. However, for example, it may be required to leave the "stroke" drawn by the pen 2, and such a case can not be coped with.

  According to Patent Document 1, in an electronic pen system using a plurality of electronic pens and a touch panel, the electronic pen includes an attribute selecting means for allowing the user to select an attribute, and attribute information selected by the attribute selecting means The invention is described in which pen information to which identification information is added is transmitted to a control device, and the control device causes an image according to attribute information acquired by the pen information received from the electronic pen to be displayed on the display device. However, in the invention of Patent Document 1, although it is possible to switch and assign various attributes to one pen in this way, it is not possible to use a plurality of identifiable pens instead of using different pens for each attribute. .

  In addition, in Patent Document 2, in order to enable writing with a plurality of pens simultaneously on a tablet, waves of different wavelengths are emitted from different pens, and the waves propagate in the tablet. The invention is later described which is detected after passing through a filter having a band pass for each wave provided at the tablet end, and the coordinates of the pen are determined for each pen. However, the invention of Patent Document 2 relates to an input interface for enabling drawing using a plurality of pens at the same time.

  Therefore, the present invention displays a content drawn by a plurality of pens on a screen, and a display device, a display method, a display program, and a display device capable of switching display and non-display of the drawn content for each pen. An object is to provide an electronic blackboard including a display device.

According to the invention
A display device for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
Drawing data generation means for generating drawing data corresponding to the pen and the drawing if drawing is performed using any of the plurality of pens;
Storage means for storing the drawing data;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. Display permission / prohibition control means for prohibiting the display of the drawing content corresponding to the pen on the screen,
Display means for displaying on the screen the drawing contents permitted to be displayed on the screen by the display permission / prohibition control means based on at least a part of the drawing data stored in the storage means When,
A control unit configured to control whether to permit or prohibit the setting of the display mode or the non-display mode for any one of the plurality of pens by a pen other than the one pen;
And a display device characterized by comprising:

Moreover, according to the present invention,
A display device for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
Drawing data generation means for generating drawing data corresponding to the pen and the drawing if drawing is performed using any of the plurality of pens;
Storage means for storing the drawing data;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. Display permission / prohibition control means for prohibiting the display of the drawing content corresponding to the pen on the screen,
Display means for displaying on the screen the drawing contents permitted to be displayed on the screen by the display permission / prohibition control means based on at least a part of the drawing data stored in the storage means And
If there is drawing content corresponding to any of the plurality of pens in a portion on the screen to be deleted by the erasing means, whether or not the drawing content is displayed in the subsequent display setting According to the present invention, there is provided a display device characterized in that either the display mode or the non-display mode is set for the pen when erasing. Furthermore, according to the present invention, there is provided an electronic blackboard provided with the display device described above.

Furthermore, according to the invention,
A display method for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
A drawing data generation step of generating drawing data corresponding to the pen and the drawing when drawing is performed using any of the plurality of pens;
Storing the drawing data in a storage unit;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. A display permission / prohibition step for prohibiting display of the drawing content corresponding to the pen on the screen even if
Displaying, on the screen, the drawing contents permitted to be displayed on the screen by the display permission / prohibition step based on at least a part of the drawing data stored in the storage means; ,
A control step of controlling whether to permit or prohibit the setting of the display mode or the non-display mode for any one of the plurality of pens by a pen other than the one pen;
There is provided a display method characterized by comprising:

Furthermore, according to the invention,
A display method for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
A drawing data generation step of generating drawing data corresponding to the pen and the drawing when drawing is performed using any of the plurality of pens;
Storing the drawing data in a storage unit;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. A display permission / prohibition step for prohibiting display of the drawing content corresponding to the pen on the screen even if
Displaying, on the screen, the drawing contents permitted to be displayed on the screen by the display permission / prohibition step based on at least a part of the drawing data stored in the storage means; ,
Have
If there is drawing content corresponding to any of the plurality of pens in a portion on the screen to be deleted by the erasing means, whether or not the drawing content is displayed in the subsequent display setting A display method is provided, which depends on whether the display mode or the non-display mode is being set for the pen when erasing.

  Further, according to the present invention, there is provided a display program for causing a computer to function as the above display device.

  According to the present invention, it is possible to display the contents drawn by a plurality of pens on the screen, and to switch between displaying and non-displaying the drawing contents for each pen.

It is a 1st figure for demonstrating a prior art example. It is a 2nd figure for demonstrating a prior art example. It is a 3rd figure for demonstrating a prior art example. BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the whole structure of the electronic blackboard by embodiment of this invention. It is a block diagram which shows the detailed structure of the IWB function part shown in FIG. 5 illustrates an example of drawing data corresponding to one trajectory of a touch pen, according to an embodiment of the present invention. It is a figure which shows an example of the locus | trajectory by a touch pen. It is a figure which shows the mode of a transition of the screen of the electronic blackboard in the operation example of Embodiment 1 of this invention. In the operation example of Embodiment 1 of this invention, it is a flowchart for demonstrating the operation | movement for making the drawing content by the pen 2 into a non-display state. In the operation example of Embodiment 1 of this invention, it is a flowchart for demonstrating the operation | movement for making the drawing content by the pen 2 into a display state. It is a figure which shows the mode of a transition of the screen of the electronic blackboard in the operation example of Embodiment 2 of this invention. It is a flowchart for demonstrating the operation example of Embodiment 2 of this invention. It is a figure which shows the mode of a transition of the screen of the electronic blackboard in the operation example of Embodiment 3 of this invention. It is a flowchart for demonstrating the operation example of Embodiment 3 of this invention. It is a figure which shows the mode of a transition of the screen of the electronic blackboard in the operation example of Embodiment 4 of this invention. It is a block diagram showing an example of detailed composition of a portion relevant to the present invention of an electronic blackboard by an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 4 is a conceptual view showing the entire configuration of the electronic blackboard according to the embodiment of the present invention.

  Referring to FIG. 4, the electronic blackboard according to an embodiment of the present invention includes a screen 101, a touch panel processing unit 103, a plurality of touch pens 105, a touch pen signal receiver 107, and an interactive white board function unit (interactive white board function unit; , “IWB function unit”. The display device of the present invention includes, for example, an IWB function unit 109.

  The screen 101 is, for example, a large liquid crystal panel, and generally displays an image according to an input video signal, and in particular, displays the drawing content by the touch pen 105. The touch panel processing unit 103 detects the touch, press or proximity of the touch pen 105 by a sensor provided therein, processes the detection signal with a built-in microcomputer or the like, and wire or wirelessly touch panel signals including position information of the touch pen 105. Output with Each touch pen 105 is used by the user for drawing, and touches, presses or approaches the touch panel by the operation of the user. In addition, each touch pen 105 outputs individual identification information of the self-touch pen and operation information (information representing an operation content for an operation button equipped on the touch pen itself) in a wired or wireless manner. The touch pen signal receiver 107 inputs individual identification information and operation information of the touch pen from each touch pen 105, and outputs the information to the IWB function unit 109 in a wired or wireless manner. The IWB function unit 109 receives a touch panel signal from the touch panel processing unit 103 and also receives individual identification information and operation information of the touch pen from the touch pen signal receiver 107. Further, the IWB function unit 109 generates drawing data representing the drawing content by the touch pen, based on the individual identification information and operation information of the touch pen, and the touch panel signal, and outputs an image signal including this to the screen 101. The screen 101 displays the screen based on the image signal, whereby the drawing content by each touch pen 105 is displayed on the screen 101.

  In FIG. 4, the number of touch pens 105 is two, but may be one or any number of three or more. Also, normally, the drawing content is drawn at a position on the screen 101 where the touch pen 105 is in contact or the like. Thereby, when an image other than the drawing content by the touch pen is superimposed and displayed, it is possible to use the electronic blackboard in a feeling that the writing pen directly deletes the writing or the writing content to the image. It becomes.

  FIG. 5 is a block diagram showing a detailed configuration of the IWB function unit 109 shown in FIG.

  Referring to FIG. 5, the IWB function unit 109 includes a control unit 109-1, a communication unit 109-3, a storage unit 109-5, and a random access memory (RAM) 109-7. These are connected to one another by a bus 109-9. The RAM 109-7 also includes a touch pen ID number management unit 121, a display state management unit 123 for each touch pen ID number, and a screen display data storage unit 125.

  The control unit 109-1 is configured of, for example, a CPU (Central Processing Unit), and reads and executes a program stored in the storage unit 109-5 to perform various controls. In particular, arithmetic processing for causing the respective hardware components shown in FIG. 5 to function as the IWB function unit 109 as a whole is performed.

  The communication unit 109-3 performs communication for inputting individual information and operation information of a pen in use from the touch pen signal receiver 107, communication for inputting a touch panel signal from the touch panel processing unit 103, and an image on the screen 101. Communication is performed to output a signal.

  The storage unit 109-5 is, for example, a non-volatile storage medium such as a hard disk drive (HDD) or a compact disc-read only memory (CD-ROM), and the control unit 109-1 controls the non-volatile storage medium. The program etc. for performing arithmetic processing of are stored.

  The RAM 109-7 is a recording medium for temporarily storing data, stores a program read from the storage unit 109-5, and stores various data generated by executing the program. Do. The control unit 109-1 described above performs arithmetic processing for control by reading and executing a program loaded into the RAM 109-7 after being read out from the storage unit 109-5.

  The touch pen ID number management unit 121 is, for each touch pen, individual identification information of the touch pen (for example, a MAC address (Media Access Control Address) of the touch pen) and an ID number which is a management number in a program executed by the control unit 109. It includes a table (see Table 1) in which (hereinafter sometimes referred to as "touch pen ID") is associated. This table included in the touch pen ID number management unit 121 is rewritable. For example, the user changes a certain touch pen ID associated with a certain individual identification information to another touch pen ID, or It is possible to change certain individual identification information associated with the touch pen ID to other individual identification information.

  The display state management unit 123 for each touch pen ID number includes, for each touch pen, a table (see Table 2) for managing the display state of the touch pen. This table associates and holds the touch pen ID and the corresponding display state. The display state includes "displaying" and "not displaying".

  In addition, the display state management unit 123 for each touch pen ID number includes, for each touch pen, a table (see Table 3) for managing the color of the touch pen. This table associates and holds the touch pen ID and the identification information of the corresponding color.

  In addition, the display state management unit 123 for each touch pen ID number includes, for each touch pen, a table (see Table 4) for managing the thickness of the touch pen. This table associates and holds the touch pen ID and the identification information of the corresponding thickness.

  In the function button area on the screen, for example, a black pen icon, a red pen icon, and a blue pen icon are displayed. Then, for example, when an icon of a red pen is pressed with a touch pen, the icon is selected. Furthermore, when an icon of a red pen is pressed with a touch pen, the thickness of a graphic representing the thickness of the pen included in the icon changes. Every time the touch pen is pressed, the IWB function unit 109 can grasp information indicating which color pen icon is pressed and the current thickness of the pen, and on the other hand, the pen icon is touched Since the touch pen which has been grasped is also grasped by a predetermined method, it is possible to assign the color and thickness grasped when the pen icon is pressed by the touch pen to the touch pen. Then, the assignment is held, and if drawing is performed using the touch pen, the ID, color and thickness of the touch pen are included in drawing data (described later) representing the contents of the drawing.

  The screen display data storage unit 125 holds drawing data for displaying the contents drawn by the touch pen on the screen. The drawing data is associated with the touch pen ID corresponding to the touch pen used for drawing. FIG. 6 shows an example of drawing data corresponding to one trajectory of the touch pen. Here, one trajectory is a trajectory between SD1 and SU1, a trajectory between SD2 and SU2 as shown in FIG. 7, or a trajectory between SD3 and SU3. In the example of FIG. 7, there are three trajectories. The first column of drawing data shown in FIG. 6 is a drawing data number, the second column is a touch pen ID, the third column is a touch pen color, the fourth column is a touch pen thickness, and the fifth column is a fifth column. The number of drawing data is assigned. Here, one trajectory is represented by one or more data sets, and the number of drawing data in the fifth column corresponds to the number of data sets constituting one trajectory. The sixth and subsequent columns are assigned to one or more data sets. There are a plurality of types of data sets, for example, a type with a straight type data set and a type with a curve (third-order Bezier curve) type data set. Examples of these are shown in Table 5.

  As shown in Table 5, a data set of type Straight is identified by a data type ID having a value of 0x10, the number of data is 4, and includes 4 coordinates. Further, the data set of the type 3rd Bezier curve is identified by a data type ID of 0x11, the number of data is 8, and includes 8 coordinates.

  Therefore, portions shown on the second line and the subsequent lines of the drawing data corresponding to one trajectory of the touch pen shown in FIG. 6 have lengths depending on the number of data sets and the type of each data set. As described later, the drawing unit generates drawing pixel data based on the numerical drawing data represented by such numerical values.

  When the touch panel signal is input through the communication unit 109-3, the control unit 109-1 also inputs the individual information of the pen through the communication unit 109-3, and a touch pen ID corresponding to the individual identification information of the pen Can be searched from the touch pen ID number management unit 121. Then, as shown in FIG. 6, the retrieved touch pen ID can be included in the numerical drawing data generated based on the touch panel signal.

  Next, for each of the four operation examples, the transition of the screen of the electronic blackboard will be described, and then the internal operation will be described.

Operation Example of First Embodiment
FIG. 8 is a diagram showing the transition of the screen of the electronic blackboard in the operation example of the first embodiment.

  In FIG. 8A, “Aiueo” is drawn by the pen 1, “Kakigukeko” is drawn by the pen 2, and “Sashisushiso” is drawn by the pen 3. Here, as shown in FIG. 8B, the operation button group includes a "pen 1 non-display" button, a "pen 2 non-display" button, and a "pen 3 non-display" button. The “pen 1 non-display” button is a button for switching the display state of the drawing content by the pen 1 to “non-display”. Similarly, the “pen 2 non-display” button is a button for switching the display state of the drawing content by the pen 2 to “non-display”. In addition, the “pen 3 non-display” button is a button for switching the display state of the drawing content by the pen 3 to “non-display”. Here, as shown in FIG. 8B, when the “pen 2 non-display” button is pressed with a touch pen, the label of this button toggles to “pen 2 display”. Then, as shown in FIG. 8C, although the drawing contents of the pen 1 “Aieueo” and the drawing contents of the pen 3 “Sashisashiso” remain displayed, the drawing contents of the pen 2 “Kaki” Only "Kukeko" is hidden.

  The label is toggled to "PEN 2 DISPLAY" When the button is pressed again by the touch pen, the label toggles back to "PEN 2 HIDE DISPLAY". Then, as shown in FIG. 8 (d), "Kakigukeko", which is the drawing content of the pen 2 which has been hidden, is re-displayed.

Thus, each time the button is pressed, the label of this button toggles between "PEN 2 HIDE" and "PEN 2 DISPLAY", and the function of this button is to
It toggles between a function for making the display state "not displaying" and a function for making the display state of the drawing contents by the pen 2 "displaying". Further, the display state of the drawing content by the pen 2 is switched between “during display” and “non-displayed”.

  The same applies to pen 1 and pen 3.

  In addition, in order to switch display and non-display to a certain touch pen, it is necessary to press a button corresponding to the pen, but the touch pen used to perform the press is a target of switching. Or a touch pen other than that. Therefore, when the touch pen is different for each user, not only the user can switch between display and non-display with respect to the drawing content by a certain user, but other users also display and non-display Since switching can be performed, convenience is improved.

  In addition, switching by another user may be prohibited. For this purpose, when the button is pressed, the touch pen ID is detected using the individual information of the touch pen that has pressed the button and the touch pen ID number management unit 121.

  FIG. 9 is a flow chart for explaining an operation for setting the display state of the drawing content by a certain pen (for example, pen 2) to “non-displayed” in the operation example of the first embodiment. With regard to all drawing data (shown in FIG. 6) corresponding to all drawing contents, it is checked whether the drawing data is associated with the pen 2 and, if so, to the drawing data A process is performed to set the display state of the corresponding drawing content to "non-displayed".

  Specifically, first, first drawing data is searched (step S201). The drawing data here is for each locus. Next, it is determined whether the search of the drawing data for each locus is all finished (step S203). If it has ended (YES in step S203), the operation is ended.

  If it has not ended (NO in step S203), it is judged by looking at the touch pen ID column shown in FIG. 6 whether or not the drawing data corresponds to the drawing content by the pen 2 (step S205). If it corresponds (YES in step S205), the non-display process corresponding to the drawing data is performed (step S207), and then the process proceeds to search for drawing data corresponding to the next locus (step S209). If not corresponding (NO in step S205), the process directly proceeds to search for drawing data corresponding to the next locus (step S209). From step S209, the process returns to step S203.

  FIG. 10 is a flowchart for explaining an operation for setting the display state of the drawing content by a certain pen (for example, pen 2) to "during display" in the operation example of the first embodiment. With regard to all drawing data (shown in FIG. 6) corresponding to all drawing contents, it is checked whether the drawing data is associated with the pen 2 and, if so, to the drawing data A process is performed to set the display state of the corresponding drawing content to "during display".

  As apparent from comparison between FIG. 9 and FIG. 10, the only change in FIG. 10 with respect to FIG. 9 is that step S207 of the non-display process is changed to step S227 of the display process. In step S227, non-display processing corresponding to the drawing data is performed.

  The other steps are the same as those of FIG.

  As will be described later with reference to FIG. 16, drawing pixel data representing the drawing contents by the pen for each pen is drawn pixel data storage unit 315 corresponding to only the pen in the screen display data storage unit 125. Depending on whether or not the drawing content by the pen is displayed for each pen, whether to include the drawing pixel data in the composite drawing pixel data may be switched.

Operation Example of Second Embodiment
FIG. 11 is a diagram showing the transition of the screen of the electronic blackboard in the operation example of the second embodiment.

  In FIG. 11 (a), “Aieueo” is drawn by the pen 1 and “Kakigukeko” is drawn by the pen 2 and “Sashisuseso” is drawn by the pen 3 and then “aiueo” which is the drawing content by the pen 1 And the display state of "Sashisuseso" which is the drawing content by the pen 3 remains "in display", but the display state of "Kakibuke" which is the drawing content by the pen 2 is switched to "in non-display" It shows how it is. Here, as shown in FIG. 11 (b), when the screen is wiped with an electronic eraser (for example, a pen having an attribute of the eraser) using the eraser function, as shown in FIG. 11 (c). As shown, among the drawing contents in the portion approaching the trace taken by the electronic eraser, the drawing contents by the pen 1 of "displaying" and the drawing by the pen 3 of "noon" and "displaying" Although the content "Suseso" is deleted, the content "Pakikakeko" drawn by the "not displayed" pen 2 is not deleted. FIG. 11C shows the screen after the display state of the pen 2 has been returned to "displaying" after the use of the eraser function. The drawing contents of the pen 2 of "non-displayed" can not be deleted even by using the eraser function, and then it is returned to "under display", so it is displayed on the screen of FIG. There is.

  FIG. 12 is a flowchart for explaining the operation of the operation example of the second embodiment.

  First, drawing data to be a candidate for deletion is detected (step S241). In the case of full screen deletion, all drawing data are candidates for deletion. In the case of area designation, drawing data included in the area is a candidate for deletion. In the case of using the eraser function, for example, the locus of the eraser is detected at predetermined intervals, and the drawing data approaching the locus is a candidate for erasure.

  Next, the processing in steps S243S to S243E is repeated for all drawing data detected in step S241.

  In each repetition, first, the touch pen ID corresponding to the drawing data to be the candidate for deletion selected in the current repetition is acquired (step S245).

  Next, it is determined whether "displaying" is set for the touch pen ID acquired in step S245 (step S247). If "displaying" is set (YES in step S247), processing is performed to delete, from the image display data storage unit 125, drawing data to be candidates for deletion selected in the current repetition (step). S249). If “not displayed” is set (NO in step S247), the image display data storage unit 125 keeps the drawing data serving as the candidate for deletion selected in the current repetition. Do.

[Operation Example of Third Embodiment]
FIG. 13 is a diagram showing the transition of the screen of the electronic blackboard in the operation example of the third embodiment.

  In FIG. 13 (a), “Aieueo” is drawn by the pen 1 and “Kakigukeko” is drawn by the pen 2 and “Sashisuseso” is drawn by the pen 3 and then “aiueo” which is the drawing content by the pen 1 And the display state of "Sashisuseso" which is the drawing content by the pen 3 remains "in display", but the display state of "Kakibuke" which is the drawing content by the pen 2 is switched to "in non-display" It shows how it is. Here, as shown in FIG. 13B, it is attempted to start drawing using the touch pen 2. Then, "non-displayed" is currently set for the drawing content by the touch pen 2, so as shown in FIG. 13C, a message box for notifying that drawing by the touch pen 2 can not be performed is displayed. , Drawing using the touch pen 2 is prohibited.

  FIG. 14 is a flowchart for explaining the operation of the operation example of the third embodiment.

  Referring to FIG. 14, first, it waits until pen down is detected (step S261), and if it is detected, the touch pen and the touch pen signal receiver 107 communicate (step S263).

  Next, individual identification information of the touch pen is acquired from the communication result in step S263 (step S265).

  Next, it is checked whether the touch pen ID number corresponding to the individual identification information acquired in step S265 exists in the table in the touch pen ID number management unit 121 (step S267). If it does not exist (NO in step S 267), the pen which has been pen down displays an error message for notifying that it can not be used because it is not registered (S 269).

  If it exists (YES in step S 267), the touch pen ID number retrieved from the table in the touch pen ID number management unit 121 in step S 267 is determined as that of the touch pen that has been pen-downed (step S 271).

  Next, it is checked whether or not the display state corresponding to the touch pen ID determined in step S271 is "displaying" (step S273). If "displaying" (YES in step S273), the process proceeds to the drawing processing (step S275) by the pen which has been pen-down. If “not displayed” (NO in step S 273), an error message for notifying that the drawing content by the pen that has been pen down can not be used because it is currently in the “not displayed” state Display (S277).

  In the drawing process (step S275), drawing data as shown in FIG. 6 is generated based on the determined touch pen ID and the locus of the touch pen, stored in the screen display data storage unit 125, and the stored drawing data An image signal including the reflected content is generated and transmitted to the screen.

[Operation Example of Fourth Embodiment]
FIG. 15 is a diagram showing the transition of the screen of the electronic blackboard in the operation example of the fourth embodiment. The operation example of the fourth embodiment is the case of using the electronic blackboard in an arithmetic class.

  FIG. 15 (a) shows a state where the problem of obtaining the volume of a solid figure is displayed on the screen. This screen is displayed by, for example, an application program executed by a personal computer connected to the electronic blackboard.

  FIG. 15B shows a state in which the student A writes a response using the touch pen 1.

  In FIG. 15C, after the teacher confirms the answer contents written by the student A, the “pen 1 non-display” button is pressed, and the drawing contents of the touch pen 1 once, that is, the student A writes It shows a state in which the display state of the content of the answer is "non-displayed".

  FIG. 15D shows a state in which the student B writes an answer by another solution using the touch pen 2.

  After this, if the teacher presses the "pen 2 non-display" button and further presses the "pen 1 display" button, the display state of the answer contents written by the student B using the touch pen 2 is "non-displayed" The answer contents written by the student A using the touch pen 1 can be returned to "displaying".

  When the display state of the answer content written by student A is set to "not displayed" or the display state of the answer content written by student B is set to "not displayed", the method described using FIG. 9 is used. A similar method is implemented.

  Further, when returning the contents of the answer written by the student A to "displaying", a method similar to the method described using FIG. 10 is executed.

[Example of configuration details]
FIG. 16 is a block diagram showing a detailed configuration example of a part related to the present invention of the electronic blackboard according to the embodiment of the present invention. The configuration example corresponds to the case where the deletion unit is image data for each trajectory. The display device of the present invention includes, for example, the block shown in FIG.

  Referring to FIG. 16, this configuration example includes an erasure area detection unit 301, a drawing pixel data combining unit 317, and a combination drawing pixel data storage unit 319 as configuration blocks corresponding to all the touch pens 1 to 3.

  Further, in this configuration example, as a configuration block corresponding to the touch pen 1, the pen 1 erase numerical drawing data detection unit 303-1 for each locus, the pen 1 numerical drawing data erasure prevention unit 305-1, the pen 1 numerical drawing for each locus A data erasing unit 307-1, a pen-1 numerical drawing data generating unit 309-1, a pen-1 numerical drawing data storage unit 311-1, a pen-1 drawing unit 313-1, and a pen-1 drawing pixel data storage unit 315-1 are included.

  Furthermore, in this configuration example, as a configuration block corresponding to the touch pen 2, a pen 2 erase numerical drawing data detection unit 303-2 for each locus, a pen 2 numerical drawing data erasure prevention unit 305-2, a pen 2 numerical drawing for each locus A data erasing unit 307-2, a pen-2 numerical drawing data generating unit 309-2, a pen-2 numerical drawing data storage unit 311-2, a pen-2 drawing unit 313-2, and a pen-2 drawing pixel data storage unit 315-2 are included.

  Furthermore, in this configuration example, as a configuration block corresponding to the touch pen 3, a pen 3 erase numerical drawing data detection unit 303-3 for each locus, a pen 3 numerical drawing data erasure prevention unit 305-3, and a pen 3 numerical drawing data for each locus It includes an erasing unit 307-3, a pen 3 numerical drawing data generating unit 309-3, a pen 3 numerical drawing data storage unit 311-3, a pen 3 drawing unit 313-3, and a pen 3 drawing pixel data storage unit 315-3.

  Each storage unit described above is provided, for example, in the screen display data storage unit 125. In addition, each unit other than each storage unit described above is realized, for example, by the control unit 109-1 reading and executing a program stored in the storage unit 109-5. In addition, at least a part of the units other than the storage units described above is constructed in, for example, the RAM 109-7 by the control unit 109-1 reading and executing a program stored in the storage unit 109-5. It is also possible.

  Next, the description regarding each block will be described in particular in relation to the touch pen 1, but the explanation related to the touch pen 1 is also applicable to the touch pen 2 and the touch pen 3.

  The pen 1 numerical drawing data generation unit 309-1 generates pen 1 numerical drawing data based on pen 1 locus data and the like.

  The pen-1 numerical drawing data storage unit 311-1 stores pen numerical drawing data. The erasure area detection unit 301 detects an erasure area. In the case of erasing using the eraser function, for example, the erase area is detected based on the locus of the eraser for each predetermined period. In the case of erasing by designating the area, for example, the erasure area is detected based on the upper left coordinates and the lower right coordinates of the area. In the case of erasing all data, the entire area is taken as an erasing area.

  The pen 1 erasure numerical drawing data detection unit 303-1 for each locus is based on the erasure area detected by the erasure area detection unit 301 and the pen 1 numerical drawing data stored in the pen 1 numerical drawing data storage unit 311-1. The pen 1 numerical drawing data corresponding to the locus included in the erasure area is detected as numerical drawing data to be erased. Here, the numerical drawing data is as shown in FIG.

  The pen 1 numerical drawing data erasure prevention unit 305-1 inputs the display state of pen 1 display / non-display from Table 2 and, when the display state is “in display”, the pen 1 erasure numerical drawing for each locus is drawn The drawing data number (see FIG. 6), which is identification information for specifying the numerical drawing data to be deleted output from the data detection unit 303-1, is output as it is to the pen 1 numerical drawing data deletion unit 307-1 for each locus. However, when the display state is "non-displayed", the drawing data number is not output at all to the pen 1 numerical drawing data deleting unit 307-1 for each locus.

  The pen 1 numerical drawing data deleting unit 307-1 for each locus is the numerical drawing data designated by the drawing data number input from the pen 1 numerical drawing data deleting prevention unit 305-1 and stored in the pen 1 numerical drawing data storage unit 311-1. Erase from

  By doing this, it is possible to prevent deletion of drawing data by a touch pen whose display state is "non-displayed".

  The pen 1 drawing unit 313-1 generates pen 1 drawing pixel data based on the pen 1 numerical drawing data stored in the pen 1 numerical drawing data storage unit 311-1.

  The pen 1 drawing pixel data storage unit 315-1 stores pen pixel drawing data.

  When the pen 1 display / non-display data input from Table 2 indicates “displaying”, the drawing pixel data combining unit 317 stores the pen 1 stored in the pen 1 drawing pixel data storage unit 315-1. The drawing pixel data is output to the combined drawing pixel data storage unit 319. Conversely, when the pen 1 display / non-display data input from Table 2 indicates "non-display", the pen 1 drawing pixel data stored in the pen 1 drawing pixel data storage unit 315-1 is used. It does not output to the combined drawing pixel data storage unit 319.

  The entire stored contents of the combined drawing pixel data storage unit 319 are erased every frame, and the drawing pixel data combining unit 317 is operated every frame. That is, if the pen n display / non-display state is "displaying", the contents of the pen n drawing pixel data storage unit 315-n are copied to the composite drawing pixel data storage unit 319 and For example, do not copy. However, without erasing the stored contents of the composite drawing pixel data storage unit 319 every frame, only the pixel data to be switched from “during display” to “during non-displaying” positively from the composite drawing pixel data storage unit 319 You may delete it.

  Thus, when "displaying" is set as the display state for the touch pen whose pen pixel drawing data is stored in the pen 1 drawing pixel data storage unit 315-1, the drawing content by the touch pen is displayed However, if "non-displayed" is set as the display state, the drawing content by the touch pen will not be displayed.

  Therefore, it is possible to display only the drawing contents by the touch pen whose display state is "during display".

  As described above, since the description related to the touch pen 1 is also applicable to the touch pen 2 and the touch pen 3, the same description related to the touch pen 2 and the touch pen 3 is omitted.

  In this configuration example, the deletion unit is the numerical drawing data for each trajectory. That is, although the erasing unit is the entire drawing data shown in FIG. 6, the erasing unit may be a data set unit included in the drawing data shown in FIG. 6, or may be a pixel unit.

  In addition, the invention described in Patent Document 2 may be combined with the above-described embodiment by adding a function for enabling a plurality of touch pens to draw simultaneously.

  The above display device and the electronic blackboard can be realized by hardware, software, or a combination thereof. Also, the above display method can be realized by hardware, software or a combination thereof. Here, to be realized by software means to be realized by a computer reading and executing a program.

  The programs can be stored and provided to a computer using various types of non-transitory computer readable media. Non-transitory computer readable media include tangible storage media of various types. Examples of non-transitory computer readable media are magnetic recording media (eg flexible disk, magnetic tape, hard disk drive), magneto-optical recording media (eg magneto-optical disk), CD-ROM (Read Only Memory), CD- R, CD-R / W, semiconductor memory (for example, mask ROM (Read Only Memory), PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)) are included.

  Also, the programs may be supplied to the computer by various types of transitory computer readable media. Examples of temporary computer readable media include electrical signals, light signals, and electromagnetic waves. The temporary computer readable medium can provide the program to the computer via a wired communication path such as electric wire and optical fiber, or a wireless communication path.

  The present invention can be used to draw on a screen provided with a touch panel using a plurality of touch pens.

101 screen 103 touch panel processing unit 105 touch pen 107 touch pen signal receiver
109 IWB function unit 109-1 control unit 109-3 communication unit 109-5 storage unit 109-7 RAM
121 touch pen ID number management unit 123 display state management unit for each touch pen ID number 125 screen display data storage unit

Claims (17)

A display device for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
Drawing data generation means for generating drawing data corresponding to the pen and the drawing if drawing is performed using any of the plurality of pens;
Storage means for storing the drawing data;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen is supported based on the drawing data To display the drawing contents to be displayed on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pen is stored in the storage means. Display permission / prohibition control means for prohibiting the display of the drawing content corresponding to the pen on the screen,
Display means for displaying on the screen the drawing contents permitted to be displayed on the screen by the display permission / prohibition control means based on at least a part of the drawing data stored in the storage means When,
Control means for controlling whether or not setting of a display mode or non-display mode for a specific pen among the plurality of pens is permitted or prohibited by a pen other than the specific pen;
A display device comprising: The display device according to claim 1,
Drawing data maintaining means for maintaining drawing data corresponding to the pen stored unchanged in the storage means while setting the non-display mode for any of the plurality of pens The display device further comprising: The display device according to claim 2,
The drawing data maintaining means is
Providing an erasure preventing means for preventing drawing data corresponding to the pen from being erased from the storage means while setting the non-display mode for any of the plurality of pens; Characteristic display device. The display device according to claim 3,
The erasing prevention means is in non-display mode corresponding to the pen on a part on the screen to be erased by the erasing means during setting of the non-display mode for any of the plurality of pens. A display device characterized in that even if there is drawing content, drawing data corresponding to the drawing content is prevented from being erased from the storage means. The display device according to claim 2,
The drawing data maintaining means is
A display device characterized by comprising drawing prohibition means for prohibiting drawing using a pen while setting the non-display mode to any of the plurality of pens. The display device according to any one of claims 2 to 4, wherein
After the non-display mode is set for any of the plurality of pens, when “display” is set for the pen, immediately before the non-display mode is set, A display device characterized by further comprising redisplay means for redisplaying the drawing content by a pen. The display device according to any one of claims 2 to 5, wherein
A display device characterized by further comprising display / non-display setting means for setting display / non-display for each of at least some of the plurality of pens. The display device according to claim 7, wherein
The display / non-display setting means is
A means for displaying on the screen an icon of each pen which can be set to be displayed / not displayed;
A means for switching display / non-display corresponding to the icon when detecting an operation on the icon;
A display device comprising: A display device according to claim 7 or 8, wherein
The display / non-display setting means can be used for setting any pen among the pens targeted for the setting and at least one other pen. A display device characterized in that it is configured in a certain manner. The display device according to any one of claims 1 to 9, wherein
For one and the same pen, one or both of assignment of any of a plurality of mutually different colors and assignment of any of a plurality of mutually different thicknesses can be made possible A display device characterized by further comprising allocation means for The display device according to any one of claims 1 to 10, wherein
A display device characterized in that at least a part of the plurality of pens individually correspond to individual users. The display device according to any one of claims 1 to 11, wherein
A display device characterized by further comprising simultaneous drawing means for drawing simultaneously with at least two pens of the plurality of pens. A display device for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
Drawing data generation means for generating drawing data corresponding to the pen and the drawing if drawing is performed using any of the plurality of pens;
Storage means for storing the drawing data;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen is supported based on the drawing data To display the drawing contents to be displayed on the screen, and while setting the non-display mode for any pen among the plurality of pens, the drawing data corresponding to the pen is stored in the storage means Display permission / prohibition control means for prohibiting the display of the drawing contents corresponding to the pen on the screen even if stored;
Display means for displaying on the screen the drawing contents permitted to be displayed on the screen by the display permission / prohibition control means based on at least a part of the drawing data stored in the storage means And
If there is drawing content corresponding to any of the plurality of pens in a portion on the screen to be deleted by the erasing means, whether or not the drawing content is displayed in the subsequent display setting A display device characterized in that either the display mode or the non-display mode is being set for the pen when erasing.   An electronic blackboard comprising the display device according to any one of claims 1 to 13. A display method for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
A drawing data generation step of generating drawing data corresponding to the pen and the drawing when drawing is performed using any of the plurality of pens;
Storing the drawing data in a storage unit;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. A display permission / prohibition step for prohibiting display of the drawing content corresponding to the pen on the screen even if
Displaying, on the screen, the drawing contents permitted to be displayed on the screen by the display permission / prohibition step based on at least a part of the drawing data stored in the storage means; ,
A control step of controlling whether to permit or prohibit the setting of the display mode or the non-display mode for any one of the plurality of pens by a pen other than the one pen;
A display method characterized by comprising: A display method for displaying contents drawn by a plurality of pens on a screen based on drawing data corresponding to the contents,
A drawing data generation step of generating drawing data corresponding to the pen and the drawing when drawing is performed using any of the plurality of pens;
Storing the drawing data in a storage unit;
If the drawing data corresponding to the pen is stored in the storage means while setting the display mode for any pen among the plurality of pens, the pen corresponds to the pen based on the drawing data To display the drawing contents on the screen, and during setting of the non-display mode for any of the plurality of pens, the drawing data corresponding to the pens is stored in the storage means. A display permission / prohibition step for prohibiting display of the drawing content corresponding to the pen on the screen even if
Displaying, on the screen, the drawing contents permitted to be displayed on the screen by the display permission / prohibition step based on at least a part of the drawing data stored in the storage means; ,
Have
If there is drawing content corresponding to any of the plurality of pens in a portion on the screen to be deleted by the erasing means, whether or not the drawing content is displayed in the subsequent display setting A display method depending on which of a display mode and a non-display mode is being set for the pen when erasing.   A display program for causing a computer to function as the display device according to any one of claims 1 to 13.

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