JP2014219928A - Computer device, display system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a computer device, a display system, and a program capable of appropriately displaying entry contents by a plurality of entry persons.SOLUTION: A computer device 3 allows a user to designate in which mode an entered stroke is to be displayed on a setting window displayed after selecting a display mode specification icon 60 by each entry person using an electronic pen 1, a normal mode or a mode less conspicuous than the normal mode. The computer device 3 displays the stroke entered by the electronic pen 1, in a display mode designated on the setting window.

Description

  The present invention relates to a technique for displaying handwritten strokes.

  2. Description of the Related Art Conventionally, electronic pens that digitize written information have been developed, and “Anot pen” developed by Swedish company Anoto is known as a representative one. For example, as described in Patent Document 1, the anotopen reads a predetermined dot pattern printed on a sheet, generates entry information, and transmits the entry information to the terminal device.

  Patent Document 2 describes a rotation correction processing function that corrects an arrangement of dots on an image caused by an angle of an electronic pen facing a dot pattern. Further, Patent Document 3 discloses a system for projecting a screen of a computer device onto a dot screen on which a dot pattern is printed by a projector, and when a stroke is drawn with an electronic pen on the dot screen, a stroke based on the entry information is disclosed. Is disclosed on both a screen of a computer device and a dot screen.

Japanese Patent No. 3842283 Special table 2003-529853 gazette JP 2011-221768 A JP 2003-308169 A

  When a plurality of writers make entries on a dot screen or the like with a plurality of electronic pens, there is a case where it is desired to pay attention by paying attention to the contents entered by a specific writer. In this case, if you completely erase the information entered by other entrants and display only the information entered by the particular entrant mentioned above, the details entered by the particular registrant There arises a problem that the relative positional relationship between the two becomes unclear. SUMMARY OF THE INVENTION Accordingly, it is a main object of the present invention to provide a computer device, a display system, and a program capable of appropriately displaying contents entered by a plurality of writers.

  In one aspect of the present invention, the computer device is a computer device that displays a handwritten stroke on a display unit, and is based on information related to a handwritten stroke including identification information for identifying an writer or a pen that has been written. Display control for displaying the first handwriting stroke corresponding to the first writer or the first pen on the display means in a manner that is less conspicuous than the second handwriting stroke corresponding to the second writer or the second pen. Have means.

  In this aspect, when the computer device displays the handwritten stroke on the display means, the second writer enters the first handwritten stroke group entered by the first writer or entered by the first pen. Or the second handwritten stroke group entered with the second pen is displayed inconspicuously. As a result, the computer device can make the second handwritten stroke group relatively conspicuous and allow the observer to appropriately recognize the relative position of the second handwritten stroke group with respect to the first handwritten stroke group. Each of the first and second handwritten stroke groups includes at least one stroke.

  In one aspect of the computer apparatus, the display control means may be configured to display either the first handwritten stroke group or the second handwritten stroke group for each writer or filled pen. A designation field for designating whether to display a handwritten stroke is displayed on the display means. According to this aspect, the computer device can preferably allow the user to specify whether or not to display the strokes conspicuously for each writer or pen that has been written.

  In another aspect of the computer apparatus, the display control means may display a designation field corresponding to an writer who has designated to display a handwritten stroke according to a display mode of the first handwritten stroke group or a pen that has been entered. A mark is displayed by the display mode of the first handwritten stroke group. According to this aspect, when the computer device causes the user to specify the display mode of the stroke for each writer or the pen that has been written, the user can preferably recognize the specified display mode.

  In another aspect of the computer apparatus, the computer apparatus further includes receiving means for receiving entry information including identification information of the electronic pen from each of the plurality of electronic pens, and the display control means includes the electronic pen included in the entry information. Based on the identification information, it is recognized whether the stroke based on the entry information corresponds to the first stroke group or the second stroke group. According to this aspect, the computer apparatus can cause the observer to appropriately grasp the relative position with respect to the other entry contents while relatively highlighting and displaying the entry contents entered with a certain electronic pen.

  In another aspect of the present invention, the computer device and electronic pen described above, a screen on which a coded pattern is printed, an image signal from the computer device, and light based on the image signal is projected onto the screen. And the screen and the projector function as the display means. According to this aspect, even when the dot screen is filled with a plurality of electronic pens, the display system displays the written contents written with a certain electronic pen relatively conspicuously, while displaying other filled contents. It is possible for the observer to appropriately grasp the relative position.

  The program according to the present invention causes a computer to function as the computer device.

  The computer apparatus according to the present invention can be configured by installing these programs in a computer and causing them to function.

  According to the present invention, when the handwritten stroke is displayed on the display means, the computer device displays the first handwritten stroke group entered by the first entry person or entered by the first pen as the second entry person. Is displayed more inconspicuously than the second handwritten stroke group entered by the second pen. As a result, the computer device can make the second handwritten stroke group relatively conspicuous and allow the observer to appropriately recognize the relative position of the second handwritten stroke group with respect to the first handwritten stroke group.

1 shows a configuration of a display system according to the present embodiment. It is explanatory drawing which shows the relationship between the arrangement | positioning of the dot in a dot pattern, and the value converted. (A) shows a dot pattern typically, and (b) is a figure showing an example of information corresponding to it. It is the schematic which shows the structure of an electronic pen. It is a functional block diagram of a computer apparatus. The example of a setting window is shown. Shows the display of the setting window with the check box cleared. The example of a display of the projection range corresponding to the setting window of FIG. 6 is shown. The example of a display of the projection range corresponding to the setting window of FIG. 7 is shown. The example of a display of the projection range concerning a modification is shown.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings.

[Display system configuration]
FIG. 1 shows a configuration of a display system 10 according to the present embodiment. The display system 10 is suitably introduced in a collaborative learning place such as a school classroom. As shown in FIG. 1, the display system 10 includes electronic pens 1 </ b> A to 1 </ b> C (1) used by writers such as teachers and students, and a computer device 3 that receives and processes entry information from the electronic pen 1. The projector 4 is connected to the computer device 3 and projects the same image as the display screen of the display onto the dot screen 5 and the dot screen 5 on which the dot pattern is printed. Hereinafter, each of these components will be described.

(Dot screen)
In the dot screen 5, a dot pattern (coded pattern) is printed on a white resin substrate with ink containing carbon that absorbs infrared rays so that the electronic pen 1 can read it. It has a layer structure protected by a resin layer or the like.

(projector)
The projector 4 receives the image signal transmitted from the computer apparatus 3 and projects light constituting the same image as the screen of the computer apparatus 3 onto a predetermined projection range 50 of the dot screen 5. The projector 4 may receive an image signal wirelessly from the computer device 3 in accordance with a wireless communication protocol or the like employed in Wi-Fi (registered trademark) or the like.

(Dot pattern)
Next, an Anoto dot pattern (coded pattern) printed on the dot screen 5 will be described with reference to FIGS. FIG. 2 is a diagram for explaining the relationship between dots of a dot pattern and values to which the dots are converted. As shown in FIG. 2, each dot of the dot pattern is associated with a predetermined value depending on its position. That is, each dot is associated with a value of 0 to 3 depending on which direction the top, bottom, left, or right is shifted from the reference position of the virtual grid (the intersection of the vertical and horizontal lines). The value of each dot can be further converted into a first bit value for the X coordinate and a second bit value for the Y coordinate. The position coordinates on the dot screen 5 are determined by the combination of the information thus associated.

  FIG. 3A shows an arrangement of a certain dot pattern. As shown in FIG. 3A, 6 × 6 dots are arranged in a range of about 2 mm in length and width so that a unique pattern can be obtained regardless of where 6 × 6 dots are taken on the dot screen 5. ing. The dot pattern formed by these 36 dots holds the position coordinates (for example, where the dot pattern is on the dot screen 5). FIG. 3B is a diagram in which each dot shown in FIG. 3A is converted into a value associated with the regularity shown in FIG. 2 according to the shift direction from the reference position of the lattice. This conversion is performed by the electronic pen 1 that captures an image of a dot pattern.

(Electronic pen)
Next, the electronic pen 1 (1A to 1C) will be described with reference to FIG. FIG. 4 is a schematic diagram showing the structure of the electronic pen 1. 4, the electronic pen 1 includes an ink cartridge 104, an LED 105, a CMOS camera 106, a pressure sensor 107, a processor 108 including a CPU, a memory 109 such as a ROM and a RAM, A communication unit 111 including a real-time clock 110, an antenna, and the like, and a battery 112 are provided. The tip of the ink cartridge 104 is a pen tip portion 103, and the user touches the pen tip portion 103 of the electronic pen 1 on the dot screen 5 and enters a stroke (handwritten stroke). Here, the first contact of the pen tip portion 103 of the electronic pen 1 with the dot screen 5 or the like is referred to as “pen down”, and the removal of the pen tip portion 103 from the contacted (contacted) state “ Called “pen-up”. A trajectory written between the pen-down and pen-up of the electronic pen 1 is one stroke, and characters, figures, etc. are composed of one or a plurality of strokes.

  The battery 112 is for supplying electric power to each component in the electronic pen 1. For example, the battery 112 is configured to turn on / off the electronic pen 1 itself by attaching and detaching a cap (not shown) of the electronic pen 1. May be. The real time clock 110 transmits time information indicating the current time (time stamp) and supplies the time information to the processor 108. The pressure sensor 107 detects the pressure applied through the ink cartridge 104 from the pen tip portion 103 when the user writes or taps a character or mark on the dot screen 5 with the electronic pen 1, that is, the writing pressure, and determines the value. Transmit to the processor 108.

  The processor 108 switches on / off the switches of the LED 105 and the CMOS camera 106 based on the writing pressure data supplied from the pressure sensor 107. That is, when the user writes characters on the dot screen 5 or the like with the electronic pen 1, the pen pressure is applied to the pen tip portion 103, and when the pressure sensor 107 detects a writing pressure of a predetermined value or higher, the processor 108 It is determined that the user has started entry, and the LED 105 and the CMOS camera 106 are activated. Then, the communication unit 111 associates pen-down information detected by the pressure sensor 107 with identification information (hereinafter referred to as “pen ID”) of the electronic pen 1 described later, and transmits the information to the computer apparatus 3 as entry information. To do. Further, when the user finishes entering one stroke and moves the electronic pen 1 away from the dot screen 5, the pressure sensor 107 detects pen-up because no writing pressure exceeding a predetermined value is detected. Then, the communication unit 111 associates the pen-up information detected by the pressure sensor 107 with the pen ID, and transmits it as entry information to the computer apparatus 3.

  The LED 105 and the CMOS camera 106 are attached near the pen tip portion 103 of the electronic pen 1, and an opening 102 is formed in a portion of the housing 101 that faces the LED 105 and the CMOS camera 106. The LED 105 illuminates infrared rays toward the vicinity of the pen tip portion 103 on the dot screen 5. The region is slightly shifted from the position where the pen tip portion 103 contacts the dot screen 5. The CMOS camera 106 is provided with an infrared transmission filter that transmits infrared rays and blocks non-infrared rays. The CMOS camera 106 captures a dot pattern in an area illuminated by the LED 105, and the image data of the dot pattern is captured. This is supplied to the processor 108. Here, since carbon absorbs infrared rays, the infrared rays irradiated by the LED 105 are absorbed by the carbon contained in the dots. Therefore, the dot portion has a small amount of infrared reflection, and the portion other than the dot has a large amount of infrared reflection. By photographing with the CMOS camera 106, a threshold value is provided based on the difference in the amount of reflected infrared light, so that a dot region containing carbon can be distinguished from other regions. Therefore, even when characters, drawings, or the like are printed on the dot screen 5, the processor 108 can recognize the dot pattern because the printed ink does not absorb in the infrared region. Note that the shooting area by the CMOS camera 106 is a range including a size of about 2 mm × about 2 mm as shown in FIG. 3A, and the shooting by the CMOS camera 106 is performed at regular intervals of about 50 to 100 times per second. Is called. Further, the CMOS camera 106 has a sufficient depth of field in order to photograph dots clearly.

  The processor 108 uses the dot pattern of the image data supplied by the CMOS camera 106 during the user entry to determine the X and Y coordinates (hereinafter referred to simply as “coordinates”) on the dot screen 5 of the stroke (handwriting) to be entered by the user. Data "or" coordinate information ") is calculated continuously. That is, the processor 108 converts the image data of the dot pattern as shown in FIG. 3A supplied by the CMOS camera 106 into the data array shown in FIG. The data is converted into a Y coordinate bit value, and X and Y coordinate data are calculated from the data array by a predetermined calculation method. The processor 108 has a rotation correction processing function that corrects the arrangement of dots on the image due to the angle of the electronic pen 1 facing the dot pattern, and this function is exhibited during coordinate calculation. Then, the processor 108 associates the current time (time stamp: entered time information) transmitted from the real-time clock 110, writing pressure data, and X and Y coordinate data. Hereinafter, these associated data are collectively referred to as “coordinate attribute information”. Since the 6 × 6 dot pattern in the dot screen 5 does not overlap in the dot screen 5, when the user enters characters or the like with the electronic pen 1, the written position corresponds to any position on the dot screen 5. This can be specified by coordinate calculation by the processor 108.

  The memory 109 stores property information such as a pen ID such as “pen01” for identifying the electronic pen 1, a pen manufacturer number, and a pen software version. The communication unit 111 associates the pen ID, time information (time stamp), writing pressure data, and X and Y coordinate data, and transmits them to the computer apparatus 3 as entry information. In this case, transmission to the computer apparatus 3 by the communication unit 111 is immediately and sequentially performed by wireless transmission such as Bluetooth (registered trademark). Here, one or more pieces of coordinate attribute information generated between the pen-down and pen-up of the electronic pen 1 and transmitted to the computer device 3 are stored as stroke information by the computer device 3. In other words, one stroke is composed of one or a plurality of X and Y coordinates (coordinate points), and the computer apparatus 3 is configured to include one or a plurality of pieces constituting one stroke by pen down information and pen up information. Recognize coordinate attribute information.

(Computer device)
Next, the computer apparatus 3 will be described. The computer device 3 includes, as hardware, an antenna device capable of data communication with the electronic pen 1, a processor such as a CPU, a memory such as a ROM and a RAM, a display, a mouse, a keyboard, and the like. The computer apparatus 3 may be configured by a tablet PC such as iPad (registered trademark), a PDA (Personal Data Assistance), a PC (personal computer) equipped with a display, or the like.

  FIG. 5 is a functional block diagram of the computer apparatus 3. Functionally, the computer apparatus 3 includes an input unit 31 such as a mouse and a keyboard, a communication unit 32, a storage unit 33, a processing unit 34, a display unit 36, and an interface 37. The communication unit 32 includes an antenna receiving circuit and the like, receives entry information from the electronic pen 1, and transmits the received information to the processing unit 34. The display means 36 is constituted by a display or the like, and displays the contents instructed by the processing means 34. The interface 37 is an interface for connecting to the projector 4. The interface 37 transmits an image signal for displaying an image on the display unit 36 to the projector 4 based on the processing command of the processing unit 34, and projects the same image as the image on the display unit 36 in synchronization.

  The processing means 34 is constituted by a processor such as a CPU and controls the entire computer device 3. The processing unit 34 includes a display control unit 341.

  The display control unit 341 displays a dedicated viewer displaying the icons 6 associated with various functions, and displays a slide designated by the user using the dedicated viewer. At this time, the display control means 341 displays a plurality of icons 6 on the slide. The display control unit 341 displays, as the icon 6, a display mode designation icon 60 for changing the display mode of the stroke to be drawn for each electronic pen 1. When the communication unit 32 receives the entry information of the electronic pen 1 for the dot screen 5, the display control unit 341 determines whether the coordinate information included in the entry information indicates the display area of the icon 6. When the coordinate information included in the entry information indicates the display area of the icon 6, the display control unit 341 recognizes that the icon 6 has been selected, and executes a process corresponding to the function associated with the icon 6. . On the other hand, when the coordinate information included in the entry information indicates a slide area other than the display area of the icon 6, the display control unit 341 immediately applies a stroke that reproduces the handwriting on the dot screen 5 on the slide being displayed by the dedicated viewer. To draw.

  Further, the processing unit 34 causes the projector 4 to project the calibration mark onto the dot screen 5 by displaying at least two or more calibration marks on the display unit 36, and the calibration mark is projected. The coordinate conversion function for converting the coordinate system related to the dot pattern of the dot screen 5 to the coordinate system related to the display of the display means 36 by causing the electronic pen 1 to read the dot pattern at the determined position and receiving the entry information. Obtain (calibration processing function). Further, when the processing unit 34 receives the coordinate system data related to the dot pattern of the dot screen 5 using the coordinate conversion function obtained by the calibration process, the processing unit 34 displays the coordinate system applied to the display of the display unit 36. The data is converted into data, and strokes are drawn or predetermined processing is performed.

  The storage means 33 is configured by a memory such as a ROM or a RAM. The storage unit 33 stores the entry information received from the electronic pen 1 for each pen ID according to the processing instruction of the processing unit 34. The storage unit 33 also stores information on the coordinate range indicated by the dot pattern corresponding to the dot screen 5 (also referred to as “coordinate definition information”). The storage unit 33 also stores a program for executing the dedicated viewer and file information including display information of each slide displayed by the dedicated viewer. Note that the slide display information includes entry information received from the electronic pen 1. In addition, the storage unit 33 stores user definition information in which the pen IDs of the electronic pens 1 </ b> A to 1 </ b> C are associated with the identification information (also referred to as “user ID”) of the writer who uses the electronic pen 1. The user definition information may be generated based on the input to the input unit 31. The user name including the serial number automatically processed by the processing unit 34 for the electronic pen 1 paired with the computer device 3 is used. It may be generated by allocating.

[Change display]
Next, the display switching function associated with the display mode designation icon 60 will be described in detail. Schematically, the display control means 341 is based on the input to the setting window displayed after the display mode designation icon 60 is selected, and the stroke based on the entry information is either a normal mode or a mode that is less conspicuous than normal. Whether or not to display is determined for each writer. Thereby, the display control means 341 makes the observer preferably visually recognize the relative positional relationship between the stroke entered by the other entrants while making the stroke entered by the designated writer relatively conspicuous. .

(1) Setting Window FIG. 6 shows a display example of the setting window 70 displayed when the display mode designation icon 60 is selected. When the display control unit 341 detects that the display mode designation icon 60 has been tapped based on the entry information received from the electronic pen 1, the display control unit 341 displays the setting window 70 shown in FIG.

  As shown in FIG. 6, in this case, the display control unit 341 includes check boxes 80A to 80C (80) provided for each writer who uses the electronic pens 1A to 1C in the setting window 70, and all check boxes. A full selection button 81 for setting 80A to 80C in a selected state (ie, a checked state), a full release button 82 for setting all the check boxes 80A to 80C in a non-selected state, and a decision button 83 are displayed. Let

  First, the display control unit 341 displays a check box 80 in the setting window 70 for each user ID registered in the user definition information stored in the storage unit 33. In the example of FIG. 6, the display control unit 341 includes the pen ID and user ID “USER01” of the electronic pen 1A, the pen ID and user ID “USER02” of the electronic pen 1B, and the pen ID and user ID “USER03” of the electronic pen 1C. "Is associated with each user ID, and check boxes 80A to 80C corresponding to each user ID are displayed together with each user ID. In the initial state, the display control unit 341 displays all the check boxes 80A to 80C in a selected state.

  When the display control unit 341 recognizes that any check box 80 has been tapped by the electronic pen 1 based on the entry information received from the electronic pen 1, the display control unit 341 releases the state of the check box 80 from the selected state. Or, switch from the released state to the selected state. When the display control unit 341 recognizes that the all selection button 81 has been tapped with the electronic pen 1 based on the entry information received from the electronic pen 1, the display control unit 341 sets all the check boxes 80A to 80C to the selected state. Further, when the display control unit 341 recognizes that the all release button 82 has been tapped by the electronic pen 1 based on the entry information received from the electronic pen 1, the display control unit 341 sets all the check boxes 80A to 80C. Set to the release state.

  Then, when the check box 80 is in the selected state, the display control unit 341 recognizes that there is a designation to display the stroke drawn by the electronic pen 1 used by the corresponding user in a normal manner. On the other hand, when the check box 80 is in the released state, the display control unit 341 recognizes that there is a designation to display the stroke drawn by the electronic pen 1 used by the corresponding user in a manner that is less noticeable than usual.

  Preferably, the display control unit 341 displays the check of the check box 80 in the released state in a manner that is less conspicuous than the check of the check box 80 in the selected state without hiding it. This will be described with reference to FIG.

  FIG. 7 shows a display of the setting window 70 in which the check boxes 80A and 80C are in a released state. As shown in FIG. 7, the display control unit 341 makes the check (mark) of the check boxes 80A and 80C released by the tap operation with the electronic pen 1 thinner than the check of the check box 80B in the selected state. And display inconspicuously. In this case, the display control unit 341 checks the check boxes 80A and 80C in the released state in the same manner as the strokes displayed by the electronic pens 1A and 1C used by the user corresponding to the check boxes 80A and 80C. It is good to display according to an aspect. In the example of FIG. 7, the display control means 341 displays the check boxes 80 </ b> A and 80 </ b> C thinly in accordance with the display mode of strokes entered with the electronic pens 1 </ b> A and 1 </ b> C (see FIG. 9 described later). Thereby, the display control means 341 can make a user recognize suitably the display mode of the stroke designated with the check box 80 made into the cancellation | release state. The check box 80 is an example of the “designation column” in the present invention.

  When the display control unit 341 detects that the determination button 83 is selected based on the entry information received from the electronic pen 1 in the state of FIG. 7, the display control unit 341 displays it on the dedicated viewer according to the state of each check box 80. The display mode of the stroke drawn on the slide is changed. A specific example will be described later with reference to FIG.

  The display control unit 341 displays the user ID corresponding to the entry person of each stroke displayed on the displayed slide instead of displaying the check boxes 80 corresponding to all the user IDs registered in the user definition information. A check box 80 corresponding to the recognized user ID may be displayed. In this case, the display control means 341 uses the electronic pen 1 in which the stroke to be displayed is entered by referring to the user-defined information based on the pen ID of the electronic pen 1 included in the entry information used for drawing the stroke. Recognizing the user ID indicating the entrant.

(2) Display Example FIG. 8 shows a display example of the projection range 50 corresponding to the case where all the check boxes 80A to 80C are selected in the setting window 70. In the example of FIG. 8, the display control unit 341 includes a stroke group 91 </ b> A that constitutes a character string “sprouting condition”, a stroke group 91 </ b> B that constitutes a character string “not required”, and stroke groups 91 </ b> C to 91 </ b> D that constitute lead lines. The drawing is performed based on the entry information received from the electronic pen 1A used by the entry person of the user ID “USER01”. In addition, the display control unit 341 uses the electronic pen 1B used by the user ID “USER02” as the stroke group 92A constituting the character string “temperature” and the stroke group 92B constituting the character string “fertilizer”. Drawing based on the received entry information. Further, the display control means 341 receives the stroke group 93A constituting the character “water” and the stroke group 93B constituting the character string “Nikko” from the electronic pen 1C used by the writer of the user ID “USER03”, respectively. Draw based on the information entered.

  In the example of FIG. 8, the display control unit 341 displays all strokes drawn by the electronic pens 1A to 1C in a normal manner. Specifically, the display control unit 341 displays each stroke with a color, line width, or the like designated based on selection of the icon 6 or the like when the stroke is entered with the electronic pen 1. In addition, when the display color or line width is designated after the stroke is entered with the electronic pen 1, the display control unit 341 displays the target stroke with the designated color or line width. The display control unit 341 may display strokes drawn with different electronic pens 1 in different colors. For example, in this case, the display control unit 341 may display the stroke drawn by the electronic pen 1A in black, the stroke drawn by the electronic pen 1B in blue, and the stroke drawn by the electronic pen 1C in red.

  FIG. 9 shows a display example of the projection range 50 corresponding to the setting window 70 shown in FIG. 7 in which the check boxes 80A and 80C are in the released state. As shown in FIG. 9, when the determination button 83 is selected when the setting window 70 is in the state shown in FIG. 7, the display control means 341 uses the electronic pen used by the writer corresponding to the check boxes 80A and 80C in the released state. The line widths of the stroke groups 91A to 91D and 93A to 93B drawn by the entry information including the pen IDs 1A and 1C are made thinner than in the case of FIG. 8 in which the check boxes 80A and 80C are selected. Thereby, the display control means 341 uses the stroke groups 91A to 91D and 93A to 93B as stroke groups drawn by the entry information including the pen ID of the electronic pen 1B used by the writer corresponding to the check box 80B in the selected state. It is less noticeable than 92A-92B. In this way, the display control unit 341 makes the stroke groups 92A to 92B corresponding to the check box 80B in the selected state relatively conspicuous, while the stroke groups 91A to 91D and 93A corresponding to the check boxes 80A and 80C in the released state. The relative positional relationship with .about.93B can be clearly displayed.

  Similarly, when the display control unit 341 receives entry information from the electronic pen 1 after setting in the setting window 70 and immediately draws a stroke based on the entry information, the display pen 341 indicated by the received entry information is the same. On the basis of the pen ID, it is determined whether the stroke is normally displayed or is displayed less conspicuously than the normal display. For example, in the example of FIG. 9, when the display control unit 341 further receives entry information from the electronic pen 1 </ b> A or 1 </ b> C by an entry operation in an area other than the icon 6, the display control unit 341 determines the stroke line width based on the entry information. The stroke groups 91A to 91D and 93A to 93B are displayed thinly.

  7 and 9, the stroke groups 91 </ b> A to 91 </ b> D and 93 </ b> A to 93 </ b> B are examples of the “first handwritten stroke group” in the present invention, and the stroke groups 92 </ b> A to 92 </ b> B are “first” in the present invention. 2 is an example of “two handwritten stroke groups”. The users indicated by the user IDs “USER01” and “USER03” are examples of the “first entry person” in the present invention, and the user indicated by the user ID “USER02” is the “second entry person” in the present invention. Is an example. The electronic pens 1A and 1C are examples of the “first pen” in the present invention, and the electronic pen 1B is an example of the “second pen” in the present invention. The pen ID of the electronic pen 1 is an example of “identification information for identifying the writer or the pen that has been filled in” in the present invention.

[Effects of this embodiment]
According to the display system 10 of the present embodiment, the computer device 3 displays the strokes that have been entered for each writer who uses each electronic pen 1 on the setting window 70 displayed after the display mode designation icon 60 is selected. The user is allowed to specify whether to display in a mode or a mode that is less conspicuous than usual. Then, the computer device 3 displays the strokes entered by each electronic pen 1 in the display mode specified on the setting window 70. Thereby, the display control means 341 can display suitably the relative positional relationship of the stroke and the stroke which another writer entered, making the stroke which the specific writer entered relatively conspicuous.

[Modification]
Next, a modification of this embodiment will be described. The following modifications may be applied in any combination to the above-described embodiment.

(Modification 1)
In the example of FIGS. 7 and 9, the display control unit 341 makes the stroke conspicuous by narrowing the line width of the stroke drawn by the electronic pen 1 used by the writer corresponding to the check box 80 in the released state. Displayed as not. Instead of this, or in addition to this, the display control means 341 may display a stroke that should be inconspicuous or / and display it as a broken line.

  FIG. 10 shows a display example of the projection range 50 according to the modification. In FIG. 10, the display control means 341 displays the stroke groups 91A to 91D and 93A to 93B drawn by the electronic pens 1A and 1C used by the writer corresponding to the check boxes 80A and 80C in the released state as the check box 80A, Compared with the case of FIG. 8 in which 80C is in the selected state, the display is lighter (that is, by the light color of the same system). Accordingly, the display control unit 341 makes the stroke groups 92A to 92B corresponding to the check box 80B in the selected state relatively conspicuous, and the stroke groups 91A to 91D and 93A corresponding to the check boxes 80A and 80C in the released state. The relative positional relationship with -93B can be clearly displayed.

  Also in this modified example, the display control unit 341 checks the check box 80 in the released state displayed on the setting window 70 with a stroke drawn by the electronic pen 1 used by the writer corresponding to the check box 80. It is good to display inconspicuously in the same mode (in FIG. 10, a thin display mode). Thereby, the display control means 341 can make an observer recognize suitably the display mode of the stroke corresponding to the check box 80 made into the cancellation | release state.

(Modification 2)
The storage means 33 stores coordinate attribute information included in the entry information from pen down to pen up as stroke information for each pen ID, and the display control means 341 performs strokes on the slide displayed by the dedicated viewer based on the stroke information. May be displayed. In this case, the storage unit 33 may store stroke information in association with the user ID recognized by the pen ID instead of the pen ID.

(Modification 3)
The display control means 341 displayed the stroke on the slide displayed by the dedicated viewer based on the entry information received by the computer device 3 from the electronic pen 1. Instead, the display control means 341 receives a file containing slide display information on which strokes of a plurality of writers are drawn from a server device that can communicate with the computer device 3, so that the dedicated viewer displays the file. A slide may be displayed. Even in this case, the display control means 341 displays the strokes entered by a plurality of writers based on the input to the setting window 70 in either a normal mode or a mode that is less conspicuous than normal. Is determined for each writer, and the stroke is displayed.

(Modification 4)
In the above-described embodiment, the Anoto method is used for the electronic pen, the dot pattern (coded pattern), and the entry information, but the present invention is not limited to the Anoto method.

DESCRIPTION OF SYMBOLS 1 ... Electronic pen 3 ... Computer apparatus 4 ... Projector 5 ... Dot screen 6 ... Icon 10 ... Display system

Claims (6)

A computer device for displaying a handwritten stroke on a display means,
The first handwritten stroke group corresponding to the first writer or the first pen is selected as the second writer or the first writer based on the information related to the handwritten stroke including the identification information for identifying the writer or the written pen. A computer apparatus comprising: display control means for causing the display means to display in a manner that is less conspicuous than the second handwriting stroke group corresponding to two pens.   The display control means designates whether to display a handwritten stroke according to either the display mode of the first handwritten stroke group or the display mode of the second handwritten stroke group for each writer or filled pen The computer apparatus according to claim 1, wherein a designation field for performing is displayed on the display means.   The display control means adds a mark to a designated field corresponding to an writer who has designated to display a handwritten stroke according to a display mode of the first handwritten stroke group or a written pen to the first handwritten stroke group. The computer apparatus according to claim 2, wherein the display is performed according to the display mode. Receiving means for receiving entry information including identification information of the electronic pen from each of the plurality of electronic pens;
The display control means recognizes whether the stroke based on the entry information corresponds to the first stroke group or the second stroke group based on the identification information of the electronic pen included in the entry information. The computer apparatus as described in any one of Claims 1-3 characterized by these. A computer device and an electronic pen according to claim 4;
A screen with a coded pattern printed thereon;
A projector that receives an image signal from the computer device and projects light based on the image signal onto the screen;
The display system, wherein the screen and the projector function as the display means.   A program for causing a computer to function as the computer device according to claim 1.