JP2013065937A - Terminal device, electronic pen system, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal device, an electronic pen system, and a program which enable a user to easily grasp the transition of written content due to rewrite.SOLUTION: A terminal device stores: stroke information including positional information and time information relating to a handwritten stroke; and erasure information for identifying the handwritten stroke or a part of the handwritten stroke ordered to be erased. Then, the terminal device causes display means to display, in time series, stroke images obtained by reproducing the handwritten stroke at each predetermined time, on the basis of the stroke information and the erasure information stored in storage means.

Description

  The present invention relates to a technique using a coding pattern readable by an electronic pen.

  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. Patent Document 3 discloses a technology for changing the color and line width of a stroke displayed on a computer when tapping on a color / line width selection palette sheet with an electronic pen in a collaborative learning system using an electronic pen. ing. Japanese Patent Application Laid-Open No. 2004-228688 discloses a technique for displaying a list of the same ranges in each answer sheet in a collaborative learning system using an electronic pen when an arbitrary position / size range is designated on a display screen.

  Furthermore, in Patent Document 4, ink that is erased by frictional heat is filled as an ink cartridge of an electronic pen, and the stroke data that has been erased by friction is identified and the stroke data is erased. Technology is disclosed. Further, in Patent Document 5, when writing is performed with an electronic pen that is not filled with an ink cartridge on a writing board on which a dot pattern is formed, the computer apparatus draws based on the entry information generated by the electronic pen. A technique for projecting a stroke onto a writing board by a projector is disclosed. Patent Document 5 also discloses an electronic eraser for erasing drawn strokes on electronic data.

Japanese Patent No. 3874498 Special table 2003-529853 gazette JP 2009-251925 A JP 2009-220552 A Special table 2003-508831 gazette

  In a system in which handwritten strokes entered with an electronic pen or the like can be converted into electronic data and the electronic data of the handwritten strokes once entered can be instructed to be erased, it is convenient for the user to grasp the transition of entry contents due to rewriting. However, when a part of the entered content is rewritten with an erasure instruction, if the handwritten stroke data to be erased is completely erased, the transition due to rewriting cannot be grasped. SUMMARY OF THE INVENTION Accordingly, it is a main object of the present invention to provide a terminal device, an electronic pen system, and a program that allow a user to easily grasp the transition of entry contents due to rewriting.

  The terminal device according to the present invention is a storage means for storing stroke information including position information and time information related to a handwritten stroke, and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke; Display control means for displaying a stroke image in which the handwritten stroke at each predetermined time point is reproduced in time series on the display means based on the stroke information and the erasure information.

  With this configuration, the storage unit of the terminal device stores stroke information including position information and time information regarding the handwritten stroke, and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke. Then, the display control means of the terminal device displays the stroke images in which the handwritten strokes at each predetermined time point are reproduced in time series on the display means based on the stroke information and the erasure information stored in the storage means. In this way, the terminal device stores the erasure information for specifying the handwritten stroke for which the erasure instruction has been given, so that the user can easily understand the transition of the rewriting time series. Can be displayed side by side.

  In one aspect of the above terminal device, the display control means sets the last time point of the predetermined time points to a time point after the time when the stroke information or the erasure information was last generated. In this aspect, of the stroke images displayed side by side in time series, the stroke image arranged last is a stroke image indicating a final state generated based on all stroke information and erasure information stored in the storage means. is there. Thereby, the terminal device can present to the user the transition of the entry content including the final state of the entry content.

  In another mode of the above terminal device, the display control means generates the erasure information from a time zone in which the stroke information is generated at a time other than the last time among the predetermined time points. Set at the time of switching to the time zone. According to this aspect, the terminal device displays the stroke images indicating the entry contents before and after the rewriting is performed side by side, and allows the user to easily grasp the rewriting transition.

  In another aspect of the above terminal device, the display control means generates a time zone in which the stroke information is generated and the erasure information at a time other than the last time among the predetermined time points. Set each time when the time zone changes. Also according to this aspect, the terminal device can display the stroke images indicating the entry contents before and after the rewriting is performed side by side so that the user can easily grasp the rewriting transition.

  In another aspect of the above terminal device, the display control means determines a portion determined to be an erasure target based on the erasure information among handwritten strokes reproduced in the stroke image based on the stroke information. It displays on the said stroke image by the display mode different from handwritten strokes other than a location. Here, the “location” may be the entire handwritten stroke or a part of the handwritten stroke. By doing in this way, the terminal device can make a user grasp | ascertain easily the erased stroke part among the stroke images arranged in time series.

  In another aspect of the terminal device, the display control unit generates the erasure information from a time zone in which the stroke information is generated among handwritten strokes reproduced in the stroke image based on the stroke information. A portion that is entered after the time of the first switching to the time zone and is not to be erased is displayed on the stroke image in a display mode different from the handwritten stroke other than the portion. By doing in this way, the terminal device can distinguish the handwritten stroke of the rewritten part from other handwritten strokes in a stroke image, and can make a user recognize.

  In another mode of the above terminal device, the display control means changes the display mode of the handwritten stroke by changing the coloring. By doing in this way, the terminal device can make a user grasp | ascertain easily the deletion part or / and the rewritten part in a stroke image.

  The electronic pen system according to the present invention reads a coded pattern and generates writing information for writing that includes position information corresponding to the coded pattern and time information corresponding to the time at which the position information was generated. Electronic pen processing unit, and an erasing electronic device that reads coded patterns and generates erasure entry information including position information corresponding to the coded patterns and time information corresponding to the time at which the position information was generated The pen processing unit, the writing entry information from the writing electronic pen processing unit, and the erasing entry information from the erasing electronic pen processing unit are received. A terminal device, wherein the terminal device receives the stroke information based on the writing entry information received from the writing electronic pen processing unit. Form and stored in the storage means, and a storage control means for storing in said memory means and generates the erasure information on the basis of the entry information for the erase received from the erasing electronic pen processing unit.

  With this configuration, the electronic pen system includes a writing electronic pen processing unit that generates writing entry information, an erasing electronic pen processing unit that generates writing entry information, and a terminal device. The stroke information is generated based on the writing entry information received from the writing electronic pen processing unit and stored in the storage means, and the erasing information is generated based on the erasing entry information received from the erasing electronic pen processing unit. To be stored in the storage means. As described above, when the electronic pen system receives the erasure entry information, the electronic pen system generates the erasure information and stores it in the storage means without erasing the stroke information of the handwritten stroke to be erased. Accordingly, the electronic pen system can display the transitions of the entry contents in time series so that the user can easily grasp the rewriting transitions.

  In one aspect of the electronic pen system, one of the writing electronic pen processing unit and the erasing electronic pen processing unit, and the writing electronic pen processing unit and the erasing electronic pen processing unit. An electronic pen capable of protruding the pen tip from the housing. By doing in this way, the user of an electronic pen system can perform both writing and erasing on electronic data with one electronic pen.

  In another aspect of the above electronic pen system, the electronic pen system further includes second display means for enlarging and displaying the display by the display means, and the display control means arranges the stroke images in time series and displays the display means. In the case of displaying on the second display means, the display of the second display means is controlled so that at least the stroke image is not displayed. By doing so, the electronic pen system can make only the observer of the display means grasp the transition of the entry contents while hiding the entry contents on the second display means.

  In another aspect of the terminal device according to the present invention, storage means for storing stroke information related to a handwritten stroke and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke, and the stroke information And a display control means for displaying on the display means a stroke image in which the handwritten stroke is reproduced based on the erasure information, wherein the display control means is reproduced in the stroke image based on the stroke information. Among the handwritten strokes, a portion determined to be an erasure target based on the erasure information is displayed on the stroke image in a display mode different from the handwritten stroke other than the portion.

  With this configuration, the storage unit of the terminal device stores stroke information including position information and time information regarding the handwritten stroke, and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke. Then, the display control means of the terminal device causes the display means to display a stroke image in which the handwritten stroke is reproduced based on the stored stroke information and erasure information. At this time, the display control means displays a portion of the handwritten stroke reproduced in the stroke image based on the stroke information that is determined to be an erasure target based on the erasure information by a display mode different from the handwritten stroke other than the portion. Display above. By doing in this way, the terminal device can make a user grasp | ascertain easily the erased stroke part among stroke images.

  In one aspect of the above terminal device, the stroke information and the erasure information further include time information related to a handwritten stroke, and the display control means includes a handwritten stroke reproduced in the stroke image based on the stroke information, A display mode different from a handwritten stroke other than the portion that is filled in after the time when the erasure information is generated first after the time zone in which the stroke information is generated, and is not an erasure target To display on the stroke image. By doing in this way, the terminal device can distinguish the handwritten stroke of the rewritten part from other handwritten strokes in a stroke image, and can make a user recognize.

  In one aspect of the terminal device, the display control means changes the display mode of the handwritten stroke by changing the coloring. According to this aspect, the terminal device can make the user easily grasp the erased part and / or the rewritten part in the stroke image.

  In one aspect of the terminal device described above, the display control unit determines that the handwritten stroke reproduced in the stroke image based on the stroke information is an erasure target based on the erasure information based on the stroke information. And the display means displays only one of the locations that are not the locations to be erased, and are entered after the time when the stroke information is generated and the time zone at which the deletion information is first generated. Let Thereby, the terminal device can make an observer grasp the erased part and the rewritten part more clearly.

  A program according to the present invention is a terminal provided with storage means for storing stroke information including position information and time information related to a handwritten stroke, and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke. The terminal, which is a program executed by the apparatus, and displays the stroke image in which the handwritten stroke at each predetermined time point is reproduced based on the stroke information and the erasure information and displayed on the display unit in time series The apparatus is made to function.

  In one aspect of the program, the display control means sets the last time of the predetermined time points to a time after the time when the stroke information or the erasure information was last generated. .

  In another aspect of the above program, the display control means sets a time other than the last time among the predetermined time points to a time when the erasure information is generated from a time zone where the stroke information is generated. It is characterized in that it is set at the time of switching to a belt.

  In another aspect of the above program, the display control means sets a time zone other than the last time point among the predetermined time points as a time zone during which the stroke information is generated and a time period during which the erasure information is generated. The program according to claim 16, wherein the program is set at each time when the band is switched.

  In another aspect of the program described above, the display control unit may determine a location determined as an erasure target based on the erasure information among handwritten strokes reproduced in the stroke image based on the stroke information. It displays on the said stroke image by the display mode different from handwritten strokes other than.

  In another aspect of the program, the display control unit generates the erasure information from a time zone in which the stroke information is generated among handwritten strokes reproduced in the stroke image based on the stroke information. Locations that are entered after the time of first switching to the time zone and that are not to be erased are displayed on the stroke image in a display mode different from the handwritten stroke other than the location.

  In another mode of the above program, the display control means changes the display mode of the handwritten stroke by changing the coloring.

  In another aspect of the above program, the coded pattern is read, and writing entry information including position information corresponding to the coded pattern and time information corresponding to the time when the position information was generated is generated. An electronic pen processing unit for writing, and an erasing unit that reads coded patterns and generates erasure entry information including position information corresponding to the coded patterns and time information corresponding to the time when the position information was generated The electronic pen system comprising: an electronic pen processing unit; and the terminal device that receives the writing entry information from the writing electronic pen processing unit and the erasing entry information from the erasing electronic pen processing unit. A program executed by the terminal device, which generates the stroke information based on the writing entry information received from the writing electronic pen processing unit. The terminal device is further caused to function as a storage control unit that stores in the storage unit and generates the deletion information based on the deletion entry information received from the deletion electronic pen processing unit and stores the deletion information in the storage unit. It is characterized by that.

  In another aspect of the program, the electronic pen system further includes a second display unit for enlarging and displaying the display by the display unit, and the display control unit displays the stroke image in time series. In the case where the display means displays the images side by side, the display of the second display means is controlled so that at least the stroke image is not displayed.

  In another aspect of the above program, the program is executed by a terminal device including a storage unit that stores stroke information related to a handwritten stroke and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke. The terminal device functions as display control means for displaying on the display means a stroke image in which the handwritten stroke is reproduced based on the stroke information and the erasure information, and the display control means comprises the stroke information Of the handwritten strokes reproduced in the stroke image based on the above, the portion determined to be the erasure target based on the erasure information is displayed on the stroke image in a display mode different from the handwritten stroke other than the portion. And

  In another aspect of the program, the stroke information and the erasure information further include time information related to a handwritten stroke, and the display control unit includes a handwritten stroke reproduced in the stroke image based on the stroke information. A portion that is filled in after the time when the stroke information is generated first is switched to a time zone in which the erasure information is generated and that is not an erasure target is displayed differently from a handwritten stroke other than the portion. Depending on the mode, it is displayed on the stroke image.

  In another mode of the above program, the display control means changes the display mode of the handwritten stroke by changing the coloring.

  In another aspect of the program, the display control unit determines that the handwritten stroke reproduced in the stroke image based on the stroke information is an erasure target based on the erasure information based on the stroke information. Only one of the location and the location that is not entered as a location to be erased is entered after the time when the stroke information is first generated and switched to the time zone in which the erasure information is generated. It is characterized by being displayed.

  By installing these programs in the terminal device and causing them to function, the terminal device according to the present invention can be configured.

  According to the present invention, the terminal device stores the stroke information of the handwritten stroke that has been instructed to be erased in association with the erasure information, and the transition of the entry contents is time-sequentially so that the user can easily grasp the transition of the rewrite. Can be displayed side by side.

  In addition, the terminal device displays on the stroke image the portion determined to be the erasure target based on the erasure information on the stroke image in a display mode different from the handwritten stroke other than the portion, so that the erased stroke portion is displayed in the stroke image. The user can easily grasp it.

It is a system configuration figure of the electronic pen system concerning this embodiment. It is a figure which shows the answer sheet utilized with an electronic pen system. 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 a disassembled perspective view of an electronic pen. Sectional drawing at the time of cut | disconnecting an electronic pen in the direction of arrow "AA" of FIG. 5 and "AB" is shown. Sectional drawing at the time of cut | disconnecting an electronic pen in the direction of arrow "BA" of FIG. 5 and "BB" is shown. 1 is a system configuration diagram of an electronic pen system including a functional block diagram of an aggregation device. It is a figure which shows the relationship between a user ID, a user name, and pen ID memorize | stored in the aggregation apparatus. It is a structure figure of the file of the learning data memorize | stored in an aggregation apparatus. It is a display example of a drawing application window in the aggregation device. It is explanatory drawing of the function menu by the drawing application in an aggregation apparatus, (A) shows the pull-down menu of a file menu, (B) shows the pull-down menu of a display menu, (C) shows the pull-down menu of a tool menu. (A) shows the transition of the stroke image when an answer is entered in the answer column of the answer sheet, and the virtual time axis corresponding to these stroke images. (B) shows the transition of the stroke image when the answer is entered in the entry field of the answer sheet and the virtual time axis corresponding to these stroke images. The drawing application window when the selected user display button and the rewrite transition mode menu are selected after the writing to the answer column by the electronic pen is completed is shown. The drawing application window when the selected user display button and the rewrite transition mode menu are selected after the writing to the entry column by the electronic pen is completed is shown. The drawing application window which concerns on the modification which displayed the answer column at the time of the selection user display button and the rewriting transition mode menu being selected is shown. The drawing application window which concerns on the modification which displayed the entry column at the time of the selection user display button and the rewriting transition mode menu being selected is shown. The stroke image displayed on a drawing application window in a modification is shown. It is a schematic block diagram of the electronic pen which concerns on a modification. The structure provided in the electronic pen part for writing and the electronic pen part for erasure | elimination is shown. The top view of the answer sheet concerning a modification is shown.

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

[System configuration of electronic pen system]
FIG. 1 is a system configuration diagram of an electronic pen system 10 according to the present embodiment. As shown in FIG. 1, the electronic pen system 10 includes answer sheets (entry sheets) 5A, 5B,... (5) distributed to each student (user) and answers (handwriting) on the answer sheet 5. The electronic pens 1A, 1B,... (1) for transmitting the entered information to the outside by a wireless communication method such as Bluetooth (registered trademark) and the entry information transmitted from each electronic pen 1 are received. And an aggregation device (terminal device) 2 that displays entry contents and the like on a display (display means).

  In FIG. 1, the aggregation device 2 receives the entry information directly from the electronic pens 1 </ b> A to 1 </ b> C. However, since there are many answer sheets 5 to be filled in, the number of electronic pens 1 that transmit the entry information is large. If the location where the student answers is out of the range of the wireless communication due to the remote location, etc., the entry information transmitted from the other electronic pens 1D, 1E,. A transfer device 3 for transferring is provided. At this time, transmission of data from the transfer device 3 to the aggregation device 2 may be performed by a TCP / IP communication method via a LAN, for example. Each electronic pen 1 can use an anotopen, the aggregation device 2 can use a laptop personal computer, etc., and the transfer device 3 can use a laptop personal computer or a data transfer dedicated computer. can do. The projector 4 is a device that receives display information from the aggregation device 2 and projects and displays the screen of the aggregation device 2 on the screen 6.

[Answer sheet]
The answer sheets 5A and 5B (5) will be described with reference to FIG. As shown in FIGS. 2A and 2B, two types of answer sheets 5A and 5B are prepared for each student. As shown in FIG. 2A, the answer sheet 5A is provided with answer columns 501A to 501C (501) for the student to fill in the answer with the electronic pen 1, as shown in FIG. 2B. The answer sheet 5B is provided with entry fields 502A and 502B (502) for the student to enter opinions and the like with the electronic pen 1. In a range including the answer column 501 and the entry column 502, a dot pattern (coded pattern) indicating a position coordinate described later is printed. A dot pattern having a different coordinate range is printed on each of the answer sheet 5A and the answer sheet 5B. In addition to the dot pattern, the answer sheet 5 is printed with a question, an outer frame of the answer field 501 or the entry field 502, and the like. The dot pattern is printed with ink containing carbon that absorbs infrared rays, and problems and the like are printed with ink that does not absorb in the infrared region.

[Dot pattern]
Next, an Anoto dot pattern (coded pattern) printed on the answer sheet 5 will be described with reference to FIGS. FIG. 3 is a diagram for explaining the relationship between the dots of the dot pattern printed on the answer sheet 5 and the values to which the dots are converted. As shown in FIG. 3, 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 answer sheet 5 are determined by the combination of the information thus associated.

  FIG. 4A shows an arrangement of a certain dot pattern. As shown in FIG. 4A, 6 × 6 dots are arranged within 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 answer sheet 5. ing. The dot pattern formed by these 36 dots holds the position coordinates (for example, where the dot pattern is on the answer sheet 5). FIG. 4B is a diagram in which each dot shown in FIG. 4A is converted into a value associated with the regularity shown in FIG. 3 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 structure of the electronic pen 1 will be described with reference to FIGS. FIG. 5 is an exploded perspective view of the electronic pen 1. 6 shows a cross-sectional view when the electronic pen 1 is cut in the directions of arrows “AA” and “AB” in FIG. 5, and FIG. 7 shows the directions of arrows “BA” and “BB” in FIG. Sectional drawing at the time of cut | disconnecting the electronic pen 1 is shown. The electronic pen 1 includes a writing electronic pen unit 104 that outputs ink for writing and an erasing electronic pen unit 114 that erases the ink output by the writing electronic pen unit 104. The electronic pen 1 can project either the pen tip portion 103 of the writing electronic pen portion 104 or the pen tip portion 113 of the erasing electronic pen portion 114 from the opening 102 by a knocking operation. It is a compound pen.

  The pen unit side housing 101A and the knock operation side housing 101B accommodate the substrate 100, the writing electronic pen unit 104, the erasing electronic pen unit 114, the knock operation units 129 and 139, and the like. The pen unit side housing 101A is screwed with the thread portion 115, and the knock operation side housing 101B is screwed with the guide portion 116, so that the pen unit side housing 101A and the knock operation side housing 101B are fixed integrally. .

  As shown in FIG. 5, the writing electronic pen unit 104 is connected to the knock operation unit 129 via a spring 120 that is fitted to an end located opposite to the pen tip unit 103. Similarly, the erasing electronic pen unit 114 is connected to the knock operation unit 139 via a spring 130 that is fitted to an end located opposite to the pen tip unit 113. Further, the protruding portion 121 of the knock operation portion 129 protrudes from the slit portion 122 extending in the longitudinal direction of the electronic pen 1. Similarly, the protruding part 131 of the knock operation part 139 protrudes from the slit part 132 extending in the longitudinal direction of the electronic pen 1.

  Further, the knock operation side housing 101B is provided with a stopper 125 as shown in FIG. The stopper 125 is fitted into the groove 128 of the knock operation portion 129 when the protruding portion 121 is pushed out in the direction of the opening 102 (also simply referred to as “pen tip direction”) by operation, and the knock operation portion. 129 is fixed. In this case, the pen tip portion 103 is in a state of protruding with respect to the opening 102 (also simply referred to as a “protruding state”). Similarly, when the protruding portion 131 is pushed out in the pen tip direction by an operation, the stopper 125 is fitted into the groove portion 138 of the knock operation portion 139 to fix the knock operation portion 139. In this case, the pen tip 113 is in a protruding state.

  In addition, as shown in FIG. 6, when an operation (knock operation) for pushing the protruding portion 131 in the pen tip direction is performed when the pen tip portion 103 is in the protruding state, the raised portions 133 and 134 of the knock operating portion 139 are performed. Pushes the knock operation portion 129 in the direction of the slit portion 122. As a result, the end of the stopper 125 is detached from the groove 128. Therefore, in this case, due to the restoring force of the spring 120, the knock operation portion 129 is urged in the direction opposite to the pen tip direction and moves along the stopper 125, and the pen tip portion 103 is moved into the pen portion side casing 101A. Is stored (also simply referred to as “stored state”). Similarly, when an operation (knock operation) for pushing the protrusion 121 in the pen tip direction is performed when the pen tip portion 113 is in the protruding state, the raised portions 123 and 124 of the knock operation portion 129 cause the knock operation portion 139 to move. Extrusion in the direction of the slit portion 132. As a result, the end of the stopper 125 is detached from the groove 138. Therefore, in this case, the knock operation portion 139 is urged in the direction opposite to the pen tip direction by the restoring force of the spring 130 and moves along the stopper 125, and the pen tip portion 113 enters the retracted state.

  As described above, when the electronic pen 1 is knocked, the pen tip portion 103 of the writing electronic pen portion 104 is in the protruding state and the pen tip portion 113 of the erasing electronic pen portion 114 is in the retracted state (the first state) State), a state in which the pen tip portion 103 is stored and the pen tip portion 113 is in a protruding state (second state), or a state in which the pen tip portion 103 is in a stored state and the pen tip portion 113 is in a stored state (first state). 3 state).

  Next, the writing electronic pen unit 104 will be specifically described. The tip of the writing electronic pen unit 104 is a pen point unit 103 formed of a material such as plastic or stainless steel, and the user touches the pen point unit 103 of the writing electronic pen unit 104 on the answer sheet 5. Enter the stroke (handwritten stroke). Here, the first contact of the pen tip portion 103 with the answer sheet 5 is referred to as “pen down”, and the removal of the pen tip portion 103 from the contact (contact) state is referred to as “pen up”. A trajectory written between the pen-down and pen-up of the pen tip portion 103 is one stroke, and characters, figures, etc. are composed of one or a plurality of strokes. Further, an ink cartridge is loaded inside the writing electronic pen unit 104. As a result, the writing electronic pen unit 104 also functions as a ballpoint pen, and after writing on the answer sheet 5, the entry contents can be visually recognized on the answer sheet 5.

  Here, the ink used as the ink cartridge is an ink that is erased by frictional heat (heating). The colorant blended in the ink includes, for example, an electron-donating color-forming organic compound, an electron-accepting compound, and a reversible thermochromic property containing at least three essential components of a reaction medium that determines the temperature at which these color reactions occur. A pigment in which the composition is encapsulated in microcapsules.

  Furthermore, the writing electronic pen unit 104 is provided with a pressure sensor 107. The pressure sensor 107 is a pressure transmitted from the pen tip portion 103 when the user causes the pen tip portion 103 to protrude from the opening portion 102 and writes or taps characters or marks on the answer sheet 5 or the like, that is, the writing pressure. Is detected and the value is transmitted to the processor 108 described later.

  Next, the erasing electronic pen unit 114 will be described. The tip of the erasing electronic pen portion 114 is a pen tip portion 113 formed of a material that generates frictional heat such as silicon rubber or SEBS resin. Then, by rubbing the nib portion 113 of the erasing electronic pen unit 114 to the location to be erased in the stroke entered on the answer sheet 5 by the writing electronic pen unit 104, the ink corresponding to the location is erased. Is done.

  Further, the erasing electronic pen unit 114 is provided with a pressure sensor 117. The pressure sensor 117 is a pressure transmitted from the pen tip 113 when the user causes the pen tip 113 to protrude from the opening 102 and writes or taps a letter or mark on the answer sheet 5 or the like, that is, writing pressure. Is detected and the value is transmitted to the processor 108 described later.

  Next, each element placed on the substrate 100 will be described with reference to FIG. The substrate unit 100 mainly includes an LED 105, a CMOS camera 106, a processor 108 configured by a CPU, a memory 109 such as a ROM and a RAM, a real-time clock 110, a communication unit 111 configured by an antenna, and a knock detection unit 140. Is provided.

  The real time clock 110 transmits time information indicating the current time (time stamp) and supplies the time information 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 or the like on the answer sheet 5 with the pen tip portion 103 of the writing electronic pen portion 104 protruding, a pen pressure is applied to the pen tip portion 103, and the pressure sensor 107 causes a brush with a predetermined value or more to be written. When pressure is detected, the processor 108 determines that the user has begun entry and activates the LED 105 and the CMOS camera 106. Similarly, when the user puts the pen tip portion 113 of the erasing electronic pen portion 114 in a protruding state and writes (traces) characters or the like on the answer sheet 5, writing pressure is applied to the pen tip portion 113, and the pressure sensor 117 When a writing pressure equal to or higher than a predetermined value is detected, the processor 108 determines that the user has started writing and activates the LED 105 and the CMOS camera 106. Then, the communication unit 111 associates pen-down information detected by the pressure sensor 117 with identification information (hereinafter referred to as “pen ID”) of the electronic pen 1 to be described later, and transmits it as entry information to the aggregation device 2. To do. Further, when the user finishes entering one stroke and moves the pen tip portion 103 of the writing electronic pen portion 104 away from the answer sheet 5, the pressure sensor 107 does not detect a writing pressure higher than a predetermined value, and the pen up Is detected. Similarly, when the user finishes entering one stroke and moves the pen tip portion 113 of the erasing electronic pen portion 114 away from the answer sheet 5, the pressure sensor 117 detects that the pen pressure of a predetermined value or more is not detected. Detect up. Then, the communication unit 111 associates the pen-up information detected by the pressure sensor 107 or the pressure sensor 117 with the pen ID, and transmits it as entry information to the aggregation device 2.

  Further, the processor 108 determines which of the pen tip portion 103 of the writing electronic pen portion 104 and the pen tip portion 113 of the erasing electronic pen portion 114 is in a protruding state in response to the detection signal of the knock detection sensor 140. The determination is made, and the determination result is added to the entry information. In other words, the processor 108 determines whether the entry information is the entry operation by the writing electronic pen unit 104 or the ink erasing operation by the erasing electronic pen unit 114 (simply referred to as “determination information Ij”). Is added to the entry information.

  The LED 105 and the CMOS camera 106 are attached in the vicinity of the pen tip portion 103 and the pen tip portion 113 of the electronic pen 1, and an opening 102 is provided at a portion facing the LED 105 and the CMOS camera 106 in the pen portion side housing 101 </ b> A. Is formed. The LED 105 illuminates infrared rays toward the pen tip portion 103 or the pen tip portion 113 near the answer sheet 5. The region is slightly shifted from the position where the pen tip portion 103 or the pen tip portion 113 contacts the answer sheet 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 the ink material of the dots of the answer sheet 5 absorbs infrared rays, the infrared rays irradiated by the LED 105 are absorbed by the dots. Therefore, the dot portion has a relatively small amount of infrared reflection, and the portion other than the dot has a relatively large amount of infrared reflection. By photographing with the CMOS camera 106, a dot area and other areas can be distinguished by providing a threshold value based on the difference in the amount of reflected infrared light. 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. 4A, 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 performs X and Y coordinates (hereinafter simply referred to as “coordinate data”) on the answer sheet 5 of the stroke (handwriting) to be entered by the user from the dot pattern of the image data supplied by the CMOS camera 106 while the user performs the entry. Or “coordinate information”) is continuously calculated. That is, the processor 108 converts the image data of the dot pattern as shown in FIG. 4 (a) supplied by the CMOS camera 106 into the data array shown in FIG. 4 (b). 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 for correcting the arrangement of dots on the image due to the angle of the electronic pen 1 facing the dot pattern, and is used for 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”. The 6 × 6 dot patterns in the answer sheet 5 do not overlap each other in the answer sheet 5, so when the user enters characters or the like with the electronic pen 1, Whether it corresponds to the position 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. Then, 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 aggregation device 2 as entry information. Transmission to the aggregation device 2 by the communication unit 111 is performed instantaneously and sequentially by wireless transmission such as Bluetooth (registered trademark). Here, one or a plurality of coordinate attribute information generated between the pen-down and pen-up of the electronic pen 1 and transmitted to the aggregation device 2 is stored as stroke information by the aggregation device 2. In other words, one stroke is composed of one or a plurality of X and Y coordinates (coordinate points), and the aggregation device 2 uses one or more of the pen-down information and the pen-up information to constitute one or a plurality of strokes. Recognize coordinate attribute information.

  The knock detection unit 140 detects whether the pen tip portion 113 of the erasing electronic pen unit 114 has changed to a protruding state or a stored state by a knock operation to the knock operation units 129 and 139. For example, when a knocking operation that changes the state of the pen tip portion 113 is performed, the knock detection unit 140 detects the movement of the pressure sensor 117, so that the pen tip portion 113 changes to either the protruding state or the retracted state. Detect if you did. Then, knock detection unit 140 transmits a detection signal (also referred to as “pen-tip state detection signal Sd”) indicating whether or not pen-tip unit 113 is in the protruding state to processor 108.

  The writing electronic pen unit 104 and the CMOS camera 106, the processor 108, the memory 109, the real time clock 110, and the communication unit 111 on the substrate 100 are examples of the “writing electronic pen processing unit” of the present invention. The electronic pen unit 114 and the CMOS camera 106, the processor 108, the memory 109, the real-time clock 110, and the communication unit 111 on the substrate 100 are examples of the “erasing electronic pen processing unit” in the present invention.

[Transfer device]
The transfer device 3 will be described with reference to FIG. FIG. 8 shows a system configuration diagram of the electronic pen system 10 including a functional block diagram of the transfer device 3 and a functional block diagram of the aggregation device 2.

  As illustrated in FIG. 8, the transfer device 3 includes a transfer reception unit 31 and a transfer transmission unit 32. The transfer receiving means 31 is means for receiving data such as entry information transmitted from the electronic pen 1 by the Bluetooth (registered trademark) wireless communication system. The transfer transmitting unit 32 is a unit that transmits data such as entry information received by the transfer receiving unit 31 to the aggregation device 2. The transmission of data to the aggregation device 2 by the transfer transmission means 32 may be performed by a TCP / IP communication system via a LAN, for example.

[Aggregator]
Next, the aggregation device 2 will be described. As shown in FIG. 8, the aggregation device 2 includes a range designation unit 20, an input unit 21, an aggregation individual reception unit (reception unit) 22, an aggregation transfer reception unit (reception unit) 23, an aggregation processing unit (processing unit) 24, A storage unit 25, a display unit 26, and a transmission unit 27 are provided. The aggregation device 2 includes, as hardware, a communication device capable of data communication with the electronic pen 1 and the projector 4, a processor such as a CPU, a memory such as a ROM, a RAM, and a hard disk, a display, a mouse, a keyboard, and the like. It is a configured personal computer or the like. Further, the aggregation device 2 processes the entry information received from the electronic pen 1 by executing the drawing application (program) by the aggregation processing means 24 and reproduces the entry contents on the display means 26.

  The aggregated individual receiving means 22 is means for receiving data such as entry information transmitted from the electronic pen 1. The aggregate transfer receiving means 23 is means for receiving data such as entry information transferred from the transfer device 3. The aggregated individual receiving unit 22 and the aggregated transfer receiving unit 23 are configured by an antenna, a receiving circuit, and the like.

  The range specifying means 20 is constituted by a pointing device such as a mouse and means for detecting the operation thereof, and by using the mouse, a button click operation on the screen of the display means 26 and a rectangular screen range of an arbitrary position / size are displayed. The specified drag operation is possible. The input means 21 is a means for instructing a processing mode including processing and display types, and is configured by a keyboard and a mouse and a means for detecting the operation. As described above, the mouse serves as both the range specifying unit 20 and the input unit 21 by the operation. The transmission means 27 is a means for transmitting the same content as the content displayed on the display means 26 from the projector 4 to the screen 6 and transmitting the display signal to the display means 26 to the projector 4 in synchronization.

  The aggregation processing unit 24 is a unit that aggregates and processes data from the electronic pen 1 and is configured by a processor such as a CPU that exhibits a function by executing an application program. The aggregation processing unit 24 includes a display control unit 240 and a storage control unit 241. When the storage control unit 241 of the aggregation processing unit 24 receives the entry information from the electronic pen 1, the entry information protrudes from the pen tip portion 103 of the writing electronic pen unit 104 based on the determination information Ij included in the entry information. Entry information generated in the state (also referred to as “writing entry information”) or entry information generated when the pen tip 113 of the erasing electronic pen unit 114 is in the protruding state (“erasing entry information”). It is also called. If the received entry information is entry information for writing, the storage control unit 241 of the aggregation processing unit 24 stores the entry information for writing in the storage unit 25 as user stroke information for each pen ID. The user stroke information includes position coordinate (XY coordinate) information calculated by the electronic pen 1, time information when written, and writing pressure information. The user stroke information is an example of “stroke information” in the present invention.

  On the other hand, if the received entry information is erasure entry information, the storage control means 241 of the aggregation processing means 24 uses the position coordinate information included in the erasure entry information to configure the user constituting the stroke to be erased. Specify stroke information. Then, the storage control unit 241 stores the specified user stroke information in the storage unit 25 in association with the information indicating that it is an erasure target and the erasure information including the time information at the time of entry. That is, when the aggregation processing unit 24 specifies the user stroke information constituting the stroke to be erased based on the erasure entry information, the aggregation processing unit 24 performs the erasure entry instead of performing the process of erasing the user stroke information from the storage unit 25. Erase information is generated based on the information, and the erase information is associated with the specified user stroke information and stored in the storage unit 25.

  Here, an example of a method for specifying a stroke to be erased based on the erasure entry information will be described. For example, when receiving the erasure entry information, the aggregation processing means 24 stores the stroke specified from the position coordinate information of the erasure entry information (also referred to as “erase stroke”) and the storage means 25. A point (intersection) at which each stroke (also referred to as “writing stroke”) specified from the position coordinate information of the user stroke information intersects on the X and Y coordinates is calculated. Then, the aggregation processing unit 24 adds erasure information to the user stroke information corresponding to the writing stroke in which the number of intersections is a predetermined number or more. In another example, the aggregation processing unit 24 includes, in the position coordinate information constituting the writing stroke, position coordinate information indicating a position within a predetermined distance from the above-described intersection exists in a predetermined ratio (for example, 80%) or more. In this case, deletion information is added to the user stroke information corresponding to the writing stroke.

  In addition, the display control unit 240 of the aggregation processing unit 24 displays an image (also referred to as a “stroke image”) that reproduces writing entry information associated with each pen ID as a handwriting for each answer field 501 or entry field 502. Generated and displayed on the display means 26. More specifically, the display control unit 240 of the aggregation processing unit 24 is a drawing that displays the user name corresponding to the user ID corresponding to the pen ID together with the input content based on the learning data including the input information about the answer sheet 5. A window based on the application (also referred to as a “drawing application window”) is displayed on the display means 26. The drawing application window will be described in detail in the section [Screen Display by Drawing Application]. In the drawing application window on the display means 26, the entry contents and the user name with the electronic pen 1 are displayed, so that the lecturer “Hanako” who is the operator has the attendee (entry person) and the entry contents by the person. Can be recognized together.

  Further, the display control unit 240 of the aggregation processing unit 24 displays the entry contents on the display unit 26 based on the learning data including the entry information about the answer sheet 5, and the user corresponding to the user ID corresponding to the electronic pen ID. Display the name. Since the entry content and the user name by the electronic pen 1 are displayed on the display means 26, the lecturer “Hanako” who is an operator can recognize the student (filler) and the entry content by the person together. it can. Further, the display control unit 240 of the aggregation processing unit 24 synchronizes the same contents as the display unit 26 and displays the same signal as the display signal for the display unit 26 to the transmission unit 27 in order to project and display on the screen 6 from the projector 4. To transmit to the projector 4. Then, each student can also recognize the entry contents projected from the projector 4 on the screen 6 and the entry person.

  The storage means 25 is constituted by a memory such as a ROM, a RAM, and a hard disk, and stores each user area and the position coordinates in the answer sheet 5 in association with each other. As shown in FIG. 9, the storage unit 25 stores a user ID and a user name in association with the unique pen ID held by the electronic pen 1 as user definition information. In FIG. 9, for example, a user ID “U01” and a user name “Taro” are stored in association with a pen ID “pen01” in advance. Further, the storage unit 25 stores the entry information transmitted by each electronic pen 1 for each pen ID.

  The storage unit 25 stores learning data in a file format by executing the drawing application (program) by the aggregation processing unit 24 based on the entry information and the user definition information. FIG. 10 shows a schematic structure of a data file format. As shown in FIG. 10, the learning data includes file attribute information and personal learning data for each user ID. The file attribute information includes creation date information. The personal learning data includes user ID, user stroke information including position coordinate information of writing entry information transmitted from the electronic pen 1, deletion information stored in association with user stroke information as appropriate, answer User color (classification) information, keyword information, and the like set by the operator for categorization according to the contents and the like are included. The user ID is specified by the aggregation processing unit 24 by referring to the user definition information stored in advance in the storage unit 25 based on the pen ID included in the entry information, and the user stroke information based on the entry information for writing It is associated. When reading the file data, the operator inputs specific information such as user ID, user color information, and keyword information to the predetermined input area by the input means 21, and the aggregation processing means 24 searches for specific data. The display unit 26 can reproduce the stroke based on the user stroke information.

[Screen display by drawing application]
Next, display processing on the display unit 26 of the aggregation processing unit 24 by execution of the drawing application will be described with reference to FIG. FIG. 11 shows an example of a window (also referred to as a “drawing application window”) based on the drawing application displayed on the display screen of the display means 26.

  As shown in FIG. 11, the user stroke information stored as individual learning data in the storage unit 25 by the aggregation device 2 based on the entry information generated when the answer sheet 5 is filled with the electronic pen 1 is an aggregation process. Drawing is performed in the user stroke information display area 50 of the display means 26 by the display control means 240 of the means 24. When the user stroke information to be drawn is larger than the user stroke information display area 50 in enlarged display or the like, the display control means 240 of the aggregation processing means 24 validates the horizontal scroll bar 51 and the vertical scroll bar 52, and the user's mouse The user stroke information display area 50 is scrolled by an operation so that the entire user stroke information can be displayed in a plurality of times.

  In addition, the aggregation processing unit 24 includes a selection user display button 53, a comparison list display button 54, a reproduction display button 56, a selection image output button 57, a display size change list 58, and a reduction display button as function buttons at the top of the drawing application window. 59, an enlarged display button 60, page feed buttons 61 and 62, rotation display buttons 63 and 64, a user control display button 65, a display switching button 66, and the like, and each process is executed by selecting a function button with the mouse. To do.

  The selected user display button 53 is a button for displaying a stroke image based on user stroke information and erasure information corresponding to one user name selected from a user selection list 69 described later. Hereinafter, the display of the drawing application window when the selected user display button 53 is selected is referred to as “selected user display”. The comparison list display button 54 is a button for displaying a list of user stroke information corresponding to a plurality of user names at the same time. Hereinafter, the display of the drawing application window when the comparison list display button 54 is selected is referred to as “comparison list display”. The reproduction display button 56 is a button for reproducing and displaying user stroke information one stroke at a time. The selected image output button 57 is a button for outputting, as image data, a stroke based on user stroke information within an arbitrary selection range. By providing this function, it is possible to easily create a model answer collection that can be used as a reference from the information entered by each student.

  The display size change list 58 is a list indicating the display size of the user stroke information currently drawn in the user stroke information display area 50. The user can arbitrarily select and change the display size from the pull-down menu using the mouse. The reduction display button 59 is a function for reducing the display size of the user stroke information drawn in the user stroke information display area 50 at a predetermined rate from the currently set display size. The enlargement display button 60 is a function for enlarging the display size of the user stroke information drawn in the user stroke information display area 50 at a predetermined rate from the currently set display size. The page feed buttons 61 and 62 are buttons for displaying answer sheets 5 having different page addresses (paper dot patterns) when a plurality of answer sheets 5 are set. The rotation display buttons 63 and 64 are buttons for rotating the user stroke information drawn in the user stroke information display area 50 by 90 degrees. By providing such a function, the paper orientation on the display can be easily changed. The user control display button 65 is a function for switching display / non-display of the user control list 68. By making it non-displayed, the user stroke information display area 50 can be enlarged.

  As shown in FIG. 11, the user control list 68 includes a user selection list 69, color classification buttons 71 to 76, a list order sort button 78, a color order sort button 79, a classification graph display button 81, a reload button 82, and the like. Is done.

  The user selection list 69 is a list for selecting user stroke information displayed in the user stroke information display area 50 by a user name. The user selection list 69 includes a user color (classification) information display field 691, a user name display field 692, and a keyword display field 693. The aggregation processing unit 24 displays the user name corresponding to the user ID associated with each user stroke information acquired from the electronic pen 1 and stored as individual learning data in the storage unit 25 in the user name display field 692, and the color The user color (classification) information selected by the classification buttons 71 to 76 is displayed in the user color (classification) information display field 691, and information of each user such as a keyword is displayed in the keyword display field 693. In the user name display field 692 of the user selection list 69, the user name corresponding to the user ID of the individual learning data stored in the storage unit 25 is displayed by the aggregation processing unit 24.

  When the operator selects a desired user from the user selection list 69 with the mouse and clicks the selected user display button 53, the display control unit 240 of the aggregation processing unit 24 answers the stroke information of the selected user. Along with the image of the paper 5, it is displayed in the user stroke information display area 50. Note that the operator of the aggregation device 2 can directly input characters into the keyword column of the user selection list 69 using the keyboard of the input unit 21, and the aggregation processing unit 24 personally learns the input characters. It is stored in the storage area for each user ID in the storage means 25 as keyword information of the data file (see FIG. 10).

  The color classification buttons 71 to 76 are buttons for setting user color (classification) information for each user displayed in the user selection list 69. The button 71 is a button for setting user color (classification) information in red, the button 72 in blue, the button 73 in yellow, the button 74 in green, the button 75 in brown, and the button 76 in white. When the operator of the aggregation device 2 selects a specific user name in the user selection list 69 with the mouse and selects a desired button among the color classification buttons 71 to 76, the aggregation processing unit 24 displays the user selection list 69. The user color (classification) information display column 691 of the selected user name is displayed in the designated color. With this function, an instructor who is an operator can see the answer contents of the student displayed in the user stroke information display area 50, color the way of thinking and the like, and make it easy to see. The user color (classification) information may be set to white when not set.

  The list order sort button 78 is a button for sorting the user list displayed in the user selection list 69 in the order of the list number. In the present embodiment, the order of user IDs shown in FIG. The color order sort button 79 is used to display the user list displayed in the user selection list 69 so that the users having the same color information attached by the operation of the color classification buttons 71 to 76 are arranged in succession. It is a button for rearranging in order of information. The classification graph display button 81 is a button for displaying the number of users for each user color information attached by operating the color classification buttons 71 to 76 in the user stroke information display area 50 as a bar graph or the like.

  The reload button 82 is a button for returning the user stroke information of the user selected in the user selection list 69 to the state when the learning data file is saved. With this function, when the instructor who is the operator selects the reload button 82 with the mouse, the aggregation processing unit 24 uses the electronic pen after the previous file storage based on the user ID associated with the selected user. The user stroke information received from 1 and stored in the storage area for each user ID of the storage means 25 is cleared, the user stroke information up to the time when the previous file was saved is read, and displayed in the user stroke information display area 50. This function can be used when an individual user wants to redo an answer.

  In addition, as shown in FIG. 12, file data storage, application settings, and the like may be prepared as function menus in the same manner as general applications. As shown in FIG. 12 (A), as a pull-down menu of the file menu 90, the strokes so that the menus 90A and 90B for reading and saving the file data, the menus 90C and 90D for saving in the image format, and the rewrite transition can be seen. It is convenient to prepare a list of execution functions related to the overall management of the application such as a rewrite transition mode menu 90E for displaying image transition and a menu 90F for executing application termination. Here, when the writing transition mode menu 90E is selected, the display control means 240 of the aggregation processing means 24 makes each answer column 501 or entry column based on the user stroke information and the erasure information so that the rewriting transition can be understood. The transition of the stroke image corresponding to the handwriting entered in 502 is displayed in time series. Hereinafter, the display of the drawing application window when the rewrite transition mode menu 90E is selected is also referred to as “rewrite transition display”. Specific contents of the rewrite transition display will be described in detail in the [Rewrite transition display function] section.

  In addition, since the file format for saving file data has a structure in which user stroke information for each user is associated with setting information, when reading file data, search for specific data from the user ID, user color information, etc. The user stroke information thus displayed can be displayed in the user stroke information display area 50.

  As a pull-down menu of the display menu 91, a full-screen display menu 91A for hiding the window frame and maximizing the display area of the application, and projector projection / setting for setting display / non-display of the drawing application window on the screen 6 by the projector 4 It is convenient to prepare a list of execution functions related to application display, such as the non-projection menu 91B. Here, when the projector projection / non-projection menu 91B is selected, the entire projection application window 91Ba for projecting the entire drawing application window onto the screen 6 by the projector 4 and the entire drawing application window are not projected onto the screen 6. The whole window non-projection menu 91 </ b> Bb and the user stroke information display area non-projection menu 91 </ b> Bc for not projecting only the display in the user stroke information display area 50 onto the screen 6 are displayed. Thus, for example, when the instructor “Hanako” who is the operator of the aggregation device 2 selects the rewrite transition mode menu 90E and performs the rewrite transition display, the whole window non-projection menu 91Bb or the user stroke information display area non-projection menu is displayed. By selecting 91Bc, the content of the rewrite transition display can be confirmed on the screen of the aggregation device 2 without being projected on the screen 6.

  Further, as a pull-down menu of the tool menu 92, a pen management menu for displaying the connection status of the electronic pen 1 (for example, the IP address of the transfer device 3) and an image of the answer sheet 5 as a background for displaying user stroke information are set. It is convenient to prepare a list of execution functions related to application settings, such as a paper management menu and a menu that displays application version and property information. When these buttons and menus are selected, each function is executed by the aggregation processing means 24.

[Rewrite transition display function]
Next, with respect to the rewrite transition display, referring to FIGS. 13 to 15, an example in which the entry is made in the answer field 501 of the answer sheet 5A and the entry field 502 in the answer sheet 5B is taken as an example. Each will be explained.

(1) When entry is made in the answer field 501 of the answer sheet 5A FIG. 13A shows an answer field 501A (see FIG. 2A) of an answer sheet 5A by a certain user (here, “Shiro”). ) Shows the transition of entry contents reproducing the entry contents in the answer column 501A when answers are entered, and the virtual time axis corresponding to these entry contents. Note that the “writing mode” in FIG. 13A is a state in which the user is writing on the answer sheet 5 with the pen tip portion 103 of the writing electronic pen portion 104 protruding, in other words, for writing. The entry information is received by the aggregation device 2. The “erasing mode” is a state in which the user erases the ink on the answer sheet 5 with the pen tip portion 113 of the erasing electronic pen portion 114 protruding. In other words, a state in which the aggregation device 2 is receiving erasure entry information. In addition, time “t1” in FIG. 13A indicates the time when entry information for writing relating to the answer column 501A is first generated (also referred to as “entry start time”), and time “t6” indicates the answer column 501A. Indicates an arbitrary time (also referred to as “entry end time”) after the aggregation device 2 last received the write entry information or the erase entry information.

  In the example shown in FIG. 13A, “objection” is once entered in the answer column 501A of the answer sheet 5A distributed to the user “Taro”, and then rewritten to “significance”. Specifically, first, in the answer column 501A, the writing electronic pen unit 104 writes “objection” between the entry start time t1 and the time “t2”. Next, during the period from time t2 to time “t3”, the character “different” in the answer column 501A is erased by the erasing electronic pen unit 114, and during the period from time t3 to time “t4” "Writing" is entered by the writing electronic pen unit 104 at the place where "" is written. Furthermore, during the period from the time t4 to the time “t5”, the characters “argument” in the answer column 501A are erased by the erasing electronic pen unit 114, and during the period from the time t5 to the entry end time t6, The character “righteous” is entered by the writing electronic pen unit 104 in the place where “is written”.

  In the example shown in FIG. 13A, between the entry start time t1 and the entry end time t6, the aggregating apparatus 2 sends the writing entry information and the erasing entry information about the answer column 501A from the electronic pen 1. Are received alternately. Specifically, the aggregation device 2 receives from the electronic pen 1 writing entry information related to the strokes constituting the “objection” between the entry start time t1 and the time t2. Next, at time t2, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the entry information for writing to the entry information for erasure, and the aggregation device 2 displays “different” between time t2 and time t3. Is received from the electronic pen 1 for designating each stroke constituting "" as an erasure target. Further, at time t3, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the erasure entry information to the writing entry information, and the aggregation device 2 performs the “intention” between the time t3 and the time t4. Entry information for writing relating to the strokes constituting the is received from the electronic pen 1. After that, at time t4, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the entry information for writing to the entry information for erasure, and the aggregation device 2 performs “conference” between time t4 and time t5. The erasure entry information for designating each stroke constituting the erasure object is received. Then, at time t5, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the erasure entry information to the writing entry information, and the aggregation device 2 receives the “from the time t5 to the entry end time t6. Entry information for writing related to the stroke constituting “righteous” is received.

  FIG. 14 shows a display of the drawing application window when the selected user display button 53 and the rewrite transition mode menu 90E are selected at the entry end time t6 when the writing to the answer field 501A by the electronic pen 1 is completed. In FIG. 14, the number of the user selection list 69 corresponding to the student selected by the operator (“Shiro” in the example shown in FIG. 14) is highlighted and surrounded by a frame 99 such as red. Stroke images 201 </ b> Aa to 201 </ b> Ac reproducing the entry contents at predetermined times in the answer column 501 </ b> A by the student are displayed side by side on the user stroke information display area 50. In FIG. 14, for convenience of expression, characters with strikethrough lines (“objection” of stroke image 201Aa and “objection” of stroke image 201Ab) are displayed in blue, and underline characters (“will” of stroke image 201Ab and stroke image are displayed. The “significance” of 201Ac is assumed to be displayed in red. In this example, it is assumed that the stroke menu reproducing the answer field 501A is specified by the tool menu 92 or the like.

  As shown in FIG. 14, in this case, the stroke information 201Aa and 201Ab at the time t2 and the time t4 when the writing mode is switched to the erasing mode and finally the entry information regarding the answer column 501A are received in the user stroke information display area 50. The stroke image 201Ac at the subsequent entry end time t6 is displayed side by side in time series. In addition, arrows “Y1” and “Y2” indicating time-series transition directions are displayed between the stroke images 201Aa to 201Ac, respectively. Thereby, the operator “Hanako” of the aggregation device 2 can easily grasp the transition of the entry contents regarding the answer column 501A of the user “Taro”.

  Further, the display control unit 240 of the aggregation processing unit 24 selects a stroke (also referred to as “erasing stroke Se”) that is an erasing target in the erasing mode among the strokes constituting the characters of the stroke images 201Aa to 201Ac. A stroke that is displayed in “blue” and entered after switching from the erase mode to the write mode (that is, after time t3) and remained without being erased until the entry end time t6 (also referred to as “rewrite stroke Sr”) is referred to as “red”. Is displayed. In this way, the display control means 240 colors the erasing stroke Se and the rewriting stroke Sr in specific colors, so that the operator “Hanako” of the aggregation device 2 can enter the contents regarding the answer column 501A of the user “Taro”. Among them, it is possible to easily grasp erased characters and rewritten characters.

  The operator “Hanako” of the aggregation device 2 selects the whole window non-projection menu 91Bb or the user stroke information display area non-projection menu 91Bc from the display menu 91, thereby displaying the rewrite transition display on the screen 6. Can be hidden.

(2) When entry is made in the entry field 502A of the answer sheet 5B FIG. 13B shows the case where the user “Shiro” enters an answer in the entry field 502A (see FIG. 2B) of the answer sheet 5B. A transition of entry contents reproducing the entry contents in the entry field 502A and a virtual time axis corresponding to these entry contents are shown. The time “t11” in FIG. 13B indicates the entry start time when the entry information for writing relating to the entry field 502A is generated for the first time, and the time “t14” is the entry information for writing or erasing entry information relating to the entry field 502A. Is the entry end time after the aggregation device 2 last received.

  In the example shown in FIG. 13B, in the entry field 502A of the answer sheet 5B distributed to the user “Taro”, after a sentence is entered, a part of the description is erased and rewritten. Specifically, first, the writing electronic pen unit 104 uses the writing pen time t11 to the time t12 to say that “even if other cities are separating garbage, it seems to be costly. Is entered in the entry field 502A. Next, during the period from time t12 to time t13, the description “I don't want to pay tax if it costs me because I am present” is erased from the entry field 502A by the erasing electronic pen unit 114, Instead, from the time t13 to the entry end time t14, the writing electronic pen unit 104 writes that “Effects in this city can be separated and recycled with the same classification of trash!”.

  In the example shown in FIG. 13B, the aggregation device 2 sends the writing entry information and the erasing entry information about the entry field 502A from the electronic pen 1 between the entry start time t11 and the entry end time t14. Are received alternately. Specifically, the aggregating apparatus 2 says, “From the start time t11 to the time t12,“ even if another city also separates garbage, it is wasteful if the cost seems to be high ”. The writing entry information relating to the stroke to be configured is received from the electronic pen 1. Next, at time t12, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the entry information for writing to the entry information for erasure, and the aggregation device 2 is “between time t12 and time t13”. However, if the cost seems to be costly, the tax is not paid. The erasing entry information for erasing each stroke constituting “is received” is received from the electronic pen 1. Further, at time t13, the entry information transmitted from the electronic pen 1 to the aggregation device 2 is switched from the erasure entry information to the write entry information. In this city, it is effective to separate the garbage and recycle the garbage of the same classification together!

  FIG. 15 shows the display of the drawing application window when the rewrite transition mode menu 90E of the file menu 90 is selected at the entry end time t14 when the writing to the entry column 502A by the electronic pen 1 is completed. In FIG. 15, the number of the user selection list 69 corresponding to the student selected by the operator (“Shiro” in the example shown in FIG. 15) is highlighted and surrounded by a frame 99 such as red. Stroke images 202 </ b> Aa and 202 </ b> Ab reproducing the contents of entry at a predetermined time point in the entry field 502 </ b> A by the student are displayed side by side on the user stroke information display area 50. In FIG. 15, as in FIG. 14, for convenience of expression, characters with strikethrough lines are displayed in blue, and underline characters are displayed in red. Here, it is assumed that the stroke menu reproducing the entry field 502A is designated by the tool menu 92 or the like.

  As shown in FIG. 15, in this case, in the user stroke information display area 50, the stroke image 202Aa at the time t12 when the writing mode is switched to the erasing mode and the stroke image 202Ab at the entry end time t14 are arranged in time series. It is displayed. Further, an arrow “Y3” indicating the transition direction is displayed between the stroke images 202Aa and 202Ab. As a result, the operator “Hanako” of the aggregation device 2 can easily grasp the transition of the contents of entry related to the entry field 502A of the user “Taro”.

  Further, the display control means 240 displays the erasing stroke Se in “blue” and the rewriting stroke Sr in “red” among the strokes constituting the characters of the stroke images 202Aa and 202Ab, and the other strokes. (Also referred to as “uncorrected stroke Sn”) is displayed in a normal color (here, “black”). By doing in this way, the operator “Hanako” of the aggregation device 2 can easily grasp the erased characters and the rewritten characters in the entry contents regarding the entry column 502A of the user “Taro”.

(3) Application Example Next, a supplementary description will be given of application examples of the rewrite transition display described in (1) and (2).

  As shown in FIGS. 14 and 15, when the user selection list 69 corresponding to a plurality of students is selected by the operator when the selected user display and the rewrite transition display are performed, the display of the aggregation processing unit 24 is performed. The control means 240 displays the time-series stroke images reproducing the answer column 501 or the entry column 502 corresponding to each selected user, and displays them in the user stroke information display area 50.

  Further, even when the user selection list 69 corresponding to one student is selected by the operator, if the student has entered answers in a plurality of answer fields 501 or entry fields 502, The display control unit 240 of the aggregation processing unit 24 displays the time series stroke images reproducing the answer field 501 or the entry field 502 in the user stroke information display area 50 side by side. Further, in this case, the display control means 240, for example, allows the operator to select the answer field 501 or the entry field 502 for displaying the transition of the stroke image, for example, the answer field 501 or the entry field in the pull-down menu of the tool menu 92. A dedicated menu for selecting 502 may be provided.

  When the comparison list display button 54 and the rewrite transition mode menu 90E are selected, the display control unit 240 arranges the transition of the stroke image that reproduces the answer column 501 or the entry column 502 corresponding to all students. It is displayed in the user stroke information display area 50.

  In these cases, the aggregation processing unit 24 appropriately activates the horizontal scroll bar 51 and the vertical scroll bar 52 when the entire stroke image cannot be displayed in the user stroke information display area 50, and the user's mouse. The user stroke information display area 50 is scrolled by an operation so that the entire stroke image to be displayed can be displayed in a plurality of times.

[Operational effects of the system of this embodiment]
According to the electronic pen system of the present embodiment, the aggregation device 2 stores the user stroke information in the storage means 25 based on the writing entry information generated when the writing electronic pen unit 104 is used, and the erasing electronic Erase information is generated based on the erasure entry information generated when the pen unit 114 is used, and is stored in the storage unit 25 in association with the corresponding user stroke information. Then, the aggregating apparatus 2 displays the stroke images in which handwritten strokes at each predetermined time point are reproduced in time series on the display unit 26 based on the user stroke information and the erasure information stored in the storage unit 25. As a result, the aggregation device 2 can display the transitions of the entry contents in time series so that the operator can easily grasp the rewrite transitions.

  Further, in the rewrite transition display, the aggregation device 2 displays a stroke image that reproduces the handwritten stroke at the time of switching from the writing mode to the erasing mode and a stroke image that reproduces the handwritten stroke at the entry end time. As a result, the aggregation device 2 can cause the operator to grasp the entry contents before and after the rewriting.

  Further, in the rewrite transition display, the aggregation device 2 displays the erase stroke Se, the rewrite stroke Sr, and the uncorrected stroke Sn in different colors. Thereby, the aggregation device 2 can make the operator easily grasp the erased portion and the rewritten portion.

  Further, the aggregation device 2 is provided with a projector projection / non-projection menu 91B in the drawing application window. Thereby, at the time of rewriting transition display, the operator can display the transition of the entry contents only on the display means 26 of the aggregation device 2 while hiding the screen 6 viewed by the student.

[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 rewrite transition display shown in FIGS. 14 and 15, the aggregation processing unit 24 displays the stroke image at the time of switching from the writing mode to the erasing mode and the stroke image at the entry end time in time series and displays them in the user stroke information display area 50. did. However, the rewrite transition display mode to which the present invention is applicable is not limited to this. In addition, the aggregation processing unit 24 may display the stroke images when switching from the erase mode to the write mode side by side in the user stroke information display area 50. This will be described with reference to FIGS.

  FIG. 16 shows a drawing application window according to a modification when the selected user display button 53 and the rewrite transition mode menu 90E are selected when the rewrite transition as shown in FIG. Indicates. As shown in FIG. 16, in the user stroke information display area 50, stroke images 203Aa to 203Ad at times t2 to t5 at the time of switching between the writing mode and the erasing mode of FIG. The stroke image 203Ae is displayed in chronological order. Similarly to FIG. 14, the erase stroke Se is displayed in “blue” (characters with a strikethrough line) and is entered after switching from the erase mode to the write mode, and is not erased until the entry end time t6 (current time). The remaining rewriting stroke Sr is displayed in “red” (underlined character).

  FIG. 17 shows a drawing application window according to a modification when the selected user display button 53 and the rewrite transition mode menu 90E are selected when the rewrite transition as shown in FIG. Indicates. As shown in FIG. 17, in the user stroke information display area 50, stroke images 204Aa and 204Ab at times t12 and t13 when switching between the writing mode and the erasing mode in FIG. And the stroke image 204Ac are displayed in time series. In FIG. 17, the erasing stroke Se is displayed as “blue” (characters with a strike-through line), the rewriting stroke Sr is displayed as “red” (underlined characters), and the uncorrected stroke Sn is displayed as “black”. ing. In FIG. 17, the stroke images 204 </ b> Aa to 204 </ b> Ac are displayed vertically so that the whole is displayed in the user stroke information display area 50, unlike FIG. 16 and the like.

  Even in these display modes, preferably, the operator “Hanako” of the aggregation device 2 can easily grasp the transition of the entry contents regarding the answer column 501A of the specific user. In addition, the operator “Hanako” of the aggregation device 2 selects either the whole window non-projection menu 91Bb or the user stroke information display area non-projection menu 91Bc from the display menu 91, so that the screen 6 is similar to the present embodiment. Then, it is possible to grasp the transition of the entry contents on the screen of the aggregation device 2 while hiding the rewrite transition display.

  The display control unit 240 designates which of the display according to the first modification (see FIGS. 16 and 17) and the display according to the present embodiment (see FIGS. 14 and 15) is the rewrite transition display. A menu for displaying may be displayed in a pull-down menu of the display menu 91, and the operator may select which one to display.

(Modification 2)
The electronic pen 1 was a composite pen including a writing electronic pen unit 104 for writing and an erasing electronic pen unit 114 for erasing. Alternatively, the electronic pen system may include an erasing electronic pen that is separate from the writing electronic pen. In this case, the writing electronic pen includes a pressure sensor, an LED, a CMOS camera, a processor, etc. in addition to the writing electronic pen unit 104, and the erasing electronic pen includes a pressure sensor in addition to the erasing electronic pen unit 114. LED, CMOS camera, and processor.

  When the electronic pen 1 is written on the screen 6 or the board on which the dot pattern is attached instead of the answer sheet 5 as in Modification 3 described later, the electronic pen system is configured as described above. An electronic eraser may be provided instead of the erasing electronic pen. In this case, the electronic eraser is a rectangular parallelepiped eraser with a built-in pressure sensor that detects the pressure of the surface to be used, a photosensitive detector that reads a dot pattern related to the position of the eraser when pressure is detected by the pressure sensor, Communication means for transmitting erasure entry information relating to the read dot pattern to the aggregation device 2.

  In the case where the writing electronic pen and the erasing electronic pen are separated, there is a possibility that the writing entry information and the erasing entry information are simultaneously generated when these are operated simultaneously. In this case, the aggregation device 2 cannot clearly distinguish between the writing mode and the erasing mode, and there is a possibility that the rewrite transition display as shown in FIGS. In this case, the aggregation device 2 may perform display based on Modification Example 4 described later.

(Modification 3)
An object to be written by the electronic pen 1 may be a screen 6 having a dot pattern on the surface. At this time, the writing electronic pen unit 104 of the electronic pen 1 may not be filled with the ink cartridge. Even in this case, when a stroke is drawn on the screen 6 by the writing electronic pen unit 104, the aggregating apparatus 2 receives the writing entry information relating to the stroke, and the display control means 240 of the aggregating apparatus 2 is used. Draws the stroke on the display unit 26 and transmits an image signal corresponding to the display on the display unit 26 to the projector 4 to project and display the stroke on the screen 6.

(Modification 4)
When the rewrite transition mode menu 90E is selected, the aggregation device 2 displays the stroke image transitions in time series in the user stroke information display area 50 as shown in FIGS. Instead of this, the aggregation device 2 may display only one stroke image for each answer field 501 or entry field 502, and display so that the display before and after rewriting can be identified by color. This will be described with reference to FIG.

  FIG. 18A shows a stroke image 205Aa reproducing the entry field 502A of a certain answer sheet 5B displayed on the user stroke information display area 50 when the rewrite transition mode menu 90E is not selected. . Here, as a premise, after the user enters “separate” in the entry field 502A by the writing electronic pen unit 104, the user erases the “present” portion by the erasing electronic pen unit 114. Further, it is assumed that “not” is written in the erased portion by the writing electronic pen unit 104. As a result, in FIG. 18A, the stroke image 205Aa at the last entry time displayed as “Do not separate” is displayed.

  FIG. 18B shows a stroke image 205Ab reproducing the entry field 502A when the rewrite transition mode menu 90E is selected. As shown in FIG. 18B, on the stroke image 205Ab, the character “A” corresponding to the erasing stroke Se is displayed in blue (character with a strike-through line) and “No” corresponding to the rewriting stroke Sr. "Is displayed in red (underlined character). Even in this case, the operator can identify and grasp the state before and after the rewriting by the color.

  The aggregation device 2 displays only one of the erasing stroke Se and the rewriting stroke Sr that has been written and not erased after switching from the erasing mode to the writing mode, based on the input from the operator. May be. In this case, for example, the display control unit 240 of the aggregation device 2 displays a menu for instructing which of the characters of the erasing stroke Se and the rewriting stroke Sr is to be displayed on the pull-down menu of the tool menu 92 of the drawing application window. Provide further. Then, when there is an input to display only the erase stroke Se, the display control means 240 of the aggregation device 2 erases and displays the rewrite stroke Sr as shown in FIG. When there is an input for displaying only the stroke Sr, the erase stroke Se is erased and displayed as shown in FIG. Thereby, the aggregation device 2 can make the operator more clearly grasp the state before and after the rewriting.

(Modification 5)
In the rewrite transition display of FIGS. 14 to 17 and the like, the aggregation device 2 colors the stroke erased by the erasing electronic pen unit 114 (erase stroke Se) in “blue”, and after switching from the erase mode to the write mode. The stroke (rewriting stroke Sr) that has been written and remains without being erased was colored “red”. However, the color combinations to which the present invention can be applied are not limited to this, and the aggregation device 2 enables the operator to identify the erasing stroke Se, the rewriting stroke Sr, and other strokes (uncorrected stroke Sn). Each may be colored differently.

  Further, the erasing stroke Se, the rewriting stroke Sr, and the uncorrected stroke Sn are not limited to being displayed in different colors, but the aggregation device 2 may display these in the user stroke information display area 50 in different display modes. Good. For example, instead of or in addition to coloring the rewriting stroke Sr, the erasing stroke Se, and the correction stroke Sn in different colors, the consolidating device 2 converts these strokes into italic, underlined or strikethrough characters, You may make it distinguish visually by displaying by a surrounding character or bold type, or displaying by a respectively different font type or / and font size.

(Modification 6)
In the description of FIG. 10, the storage control unit 241 of the aggregation device 2 stores the erasure information in the storage unit 25 in association with each user stroke information constituting the stroke. Instead, the storage control unit 241 may store the erasure information in the storage unit 25 in association with each position coordinate (XY coordinate) information of the user stroke information. For example, in this case, when receiving the erasure entry information, the aggregation device 2 specifies the position coordinate information of the user stroke information indicating within a predetermined distance from the position indicated by the position coordinate information of the erasure entry information by calculation, The deletion information generated from the deletion entry information is associated with the position coordinate information.

  In this way, for example, after the user enters the character “Ne” on the answer sheet 5 using the writing electronic pen unit 104, a part of the character is erased using the erasing electronic pen unit 114 and directly converted to the character “WA”. Even when a part of the stroke is erased, such as when the aggregation device 2 can appropriately store the user stroke information and the erase information, and display the transition of the entry contents in the user stroke information display area 50. it can. When a part of the stroke is deleted, the display control unit 240 of the aggregation device 2 displays a part based on the user stroke information associated with the deletion information in blue as the deletion stroke Se. A portion based on user stroke information that is not associated with erasure information is displayed in black as an uncorrected stroke Sn.

(Modification 7)
The electronic pen 1 shown in FIG. 5 to FIG. 7 is a knock-type composite pen that can switch between a protruding state and a retracted state of the writing electronic pen unit 104 and the erasing electronic pen unit 114 by a knocking operation. However, the configuration to which the present invention is applicable is not limited to this.

  FIG. 19 is a schematic configuration diagram of an electronic pen 1 according to Modification 7. As shown in FIG. 19, when the pen unit side casing 101A rotates in the direction of the double arrow “Yx” with respect to the knock operation side casing 101B, the electronic pen 1 is in the first state and the second state. And transition to the third state. As described above, even if the pen tip portions 103 and 113 protruding from the opening portion 102 are switched by the rotation operation of the pen portion side casing 101A, the user can change the writing electronic pen portion 104 and the erasing electronic pen portion 114. Both can be used suitably.

(Modification 8)
In the above description, the knock detection unit 140 detects whether the pen tip portion 113 is in the protruding state or the retracted state by detecting the movement of the pressure sensor 117. However, the configuration to which the present invention is applicable is not limited to this.

  FIG. 20 shows a structure provided in the writing electronic pen unit 104 and the erasing electronic pen unit 114 according to Modification 8. As shown in FIG. 20, the writing electronic pen unit 104 extends to a position passing through the hole 152 of the eight-shaped rotating unit 151 and has a nut-like member 155 having a larger nut shape than the hole 152. Are fixed to the writing electronic pen unit 104 on the spring 120 side of the hole 152. Similarly, the erasing electronic pen unit 114 has a nut-shaped member 156 that extends to a position passing through the hole 153 provided in the 8-shaped rotation unit 151 and has a nut-shaped shape larger than the hole 153. The erasing electronic pen unit 114 is fixed to the spring 130 side of the hole 153. In addition, the 8-shaped rotation unit 151 rotates together with the shaft unit 150 using a shaft unit 150 communicating with a knock detection unit 140 corresponding to a rotary switch provided on the substrate 100 as a rotation axis.

  When the writing electronic pen unit 104 is moved in the pen tip direction by a knocking operation, a portion where the hole 152 of the 8-shaped rotating unit 151 is formed is pushed out by the nut-like member 155 in the pen tip direction, and the 8-shaped type The rotating part 151 rotates together with the shaft part 150 in the direction of the arrow “Y1”. In this case, the knock detection unit 140 that is a rotary switch detects that the writing electronic pen unit 104 is in a protruding state based on the state (phase) of the shaft unit 150. On the other hand, when the erasing electronic pen unit 114 is moved in the direction of the pen tip by the knocking operation, the portion where the hole 153 of the 8-shaped rotating unit 151 is formed is pushed out by the nut-shaped member 156 in the direction of the pen tip, and The rotating part 151 rotates together with the shaft part 150 in the direction of the arrow “Y2”. In this case, the knock detection unit 140 detects that the erasing electronic pen unit 114 is in the protruding state and the writing electronic pen unit 104 is in the stored state based on the state (phase) of the shaft unit 150. Note that when the writing electronic pen unit 104 and the erasing electronic pen unit 114 are both stored, the 8-shaped rotating unit 151 and the shaft unit 150 are inclined in both the directions of the arrows Y1 and Y2. There will be no equilibrium. In this case, the knock detection unit 140 detects that the pen tip portion 113 of the erasing electronic pen portion 114 and the pen tip portion 103 of the writing electronic pen portion 104 are both stored based on the phase of the shaft portion 150. .

  In another example, knock detection unit 140 may be a strain gauge. In this case, knock detection unit 140 is provided on a conductor (not shown) that connects pressure sensor 117 and processor 108 of substrate 100. Then, the knock detection unit 140 detects a change in the distortion (expansion / contraction) of the conductive wire based on the movement of the erasing electronic pen unit 114 in the pen tip direction and the opposite direction, and the pen tip unit 113 of the erasing electronic pen unit 114. The protruding state and the storage state of the are detected.

  In yet another example, the aggregation processing unit 24 replaces the pen tip state detection signal Sd transmitted from the knock detection unit 140 based on which of the pressure sensors 107 and 117 detects the writing pressure. It may be determined whether the pen tip portion 103 or the pen tip portion 113 is in a protruding state and is in contact with the answer sheet 5.

(Modification 9)
The knock detection unit 140 detects whether the pen tip portion 113 is in the protruding state or the retracted state. Alternatively, the knock detection unit 140 may detect whether the pen tip portion 103 is in the protruding state or the retracted state. In this case, for example, the knock detection unit 140 detects the movement of the pressure sensor 107 in the longitudinal direction of the writing electronic pen unit 104 instead of detecting the movement of the pressure sensor 117 in the longitudinal direction of the erasing electronic pen unit 114. By detecting this, it is detected whether the pen tip portion 103 is in the protruding state or the retracted state, and a pen tip state detection signal Sd is transmitted to the processor 108.

(Modification 10)
The answer sheet 5 may be printed with only a dot pattern. FIG. 21 is a top view of the answer sheet 5 according to the modification. As shown in FIG. 21, in this case, a set of a plurality of answer sheets 5 is prepared for each student, and dot patterns of different coordinate ranges are printed on the same set of answer sheets 5. In this case, the aggregation processing unit 24 cuts out a range that includes at least a stroke written by each student, generates a stroke image corresponding to the cut-out range, and displays the stroke image in the user stroke information display area 50. .

(Modification 11)
The aggregation device 2 receives entry information from the electronic pen 1 by a wireless communication method such as Bluetooth (registered trademark), and performs predetermined display using user stroke information based on the entry information. However, the method to which the present invention is applicable is not limited to this.

  Instead of this, for example, the electronic pen system includes a pressure-sensitive board configured to be able to detect pressure instead of the screen 6, and further replaces the electronic pen 1 with no writing of electronic functions. And a erasing erasable rectangular parallelepiped.

  In this aspect, when a stroke is drawn on the pressure-sensitive board with a predetermined pen, the aggregating apparatus 2 receives the detection signal of the pressure-sensitive board, and detects the detection signal to the projector attached to the upper part of the pressure-sensitive board. Is transmitted to display the stroke drawn by the above-described pen on the pressure-sensitive board. In addition, the aggregation device 2 stores the stroke information as user stroke information. In addition, when the eraser is operated so that the surface of the eraser slides on the pressure-sensitive board, the aggregation device 2 is, for example, based on the detection signal of the pressure-sensitive board, a predetermined area or more on the pressure-sensitive board. It is determined that there is a contact, and the erasure information is stored in association with the user stroke information corresponding to the stroke existing in the detected range. Therefore, even in this aspect, the aggregation device 2 can suitably perform the rewrite transition display.

  In another example, a tablet PC having a touch panel such as iPad (registered trademark) is distributed to each student, and the tablet PC transmits stroke information drawn on the touch panel of the tablet PC to the aggregation device 2. May be. In this case, the aggregation device 2 generates and stores user stroke information based on the stroke information received from the tablet PC, and performs display based on the user stroke information. In addition, when the tablet PC detects an operation for erasing a stroke drawn on the touch panel by the touch panel operation of the tablet PC, the aggregation device 2 displays the information on the stroke to be erased or the information on the erase range. It is received from the PC, and erase information is added to the corresponding user stroke information and stored. Then, the aggregation device 2 causes the display unit 26 to display a rewrite transition display as shown in FIGS. 14 to 17 based on the user stroke information and the erasure information stored in the storage unit 25. Also according to this aspect, the operator of the aggregation device 2 can preferably easily grasp the transition of the entry contents entered by the students on the screen of the aggregation device 2.

(Modification 12)
In the above embodiment, the Anoto method is used for the electronic pen, the dot pattern (coded pattern), and the entry information. However, the Anoto method is not necessarily limited.

DESCRIPTION OF SYMBOLS 1 (1A-1E) ... Electronic pen 2 ... Aggregation apparatus 3 ... Transfer apparatus 4 ... Projector 5 (5A-5E) ... Answer sheet 6 ... Screen 10 ... Electronic pen system 20 ... Range designation means 21 ... Input means 22 ... Individual aggregation Receiving means 23: Aggregation transfer receiving means 24 ... Aggregation processing means 25 ... Storage means 26 ... Display means 27 ... Transmission means

Claims (27)

Storage means for storing stroke information including position information and time information related to a handwritten stroke, and erase information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke;
A terminal device comprising: a display control unit configured to display a stroke image in which the handwritten stroke at each predetermined time point is reproduced based on the stroke information and the erasure information in a time series and displayed on a display unit.   2. The terminal device according to claim 1, wherein the display control unit sets the last time of each of the predetermined time points to a time after the time when the stroke information or the erasure information was last generated. .   The display control means sets each of the predetermined time points other than the last time point as a time point when the time period when the stroke information is generated is switched to the time period when the erasure information is generated. The terminal device according to claim 2, wherein:   The display control means sets a time point other than the last time point among the predetermined time points to a time point when the time zone in which the stroke information is generated and the time zone in which the erasure information is generated, respectively. The terminal device according to claim 2. The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information, a portion determined to be an erasure target based on the erasure information is displayed on the stroke image in a display mode different from the handwritten stroke other than the portion. The terminal device according to claim 1, wherein the terminal device is a terminal device. The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information,
Filled in after the time of the first switching from the time zone in which the stroke information is generated to the time zone in which the erasure information is generated, and a location that is not an erasure target,
The terminal device as described in any one of Claims 1 thru | or 5 displayed on the said stroke image by the display mode different from the handwritten strokes other than the said location.   The terminal device according to claim 5, wherein the display control unit changes a display mode of the handwritten stroke by changing coloring. A writing electronic pen processing unit that reads the coding pattern and generates writing entry information including position information corresponding to the coding pattern and time information corresponding to a time at which the position information was generated;
An erasing electronic pen processing unit that reads an encoded pattern and generates erasure entry information including position information corresponding to the encoded pattern and time information corresponding to a time at which the position information was generated;
8. The terminal device according to claim 1, wherein the terminal device receives writing entry information from the writing electronic pen processing unit and erasing entry information from the erasing electronic pen processing unit. An electronic pen system,
The terminal device
Based on the writing entry information received from the writing electronic pen processing unit, the stroke information is generated and stored in the storage means, and based on the erasing entry information received from the erasing electronic pen processing unit An electronic pen system comprising storage control means for generating the erasure information and storing it in the storage means.   Projecting the pen tip of either the writing electronic pen processing unit and the erasing electronic pen processing unit or the writing electronic pen processing unit and the erasing electronic pen processing unit from the casing. The electronic pen system according to claim 8, further comprising an electronic pen capable of performing the following. A second display means for enlarging and displaying the display by the display means;
The display control means includes
The display of the second display means is controlled so that at least the stroke image is not displayed when the stroke images are displayed in time series on the display means. Electronic pen system as described. Storage means for storing stroke information relating to a handwritten stroke and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke;
A terminal device comprising display control means for displaying on the display means a stroke image in which the handwritten stroke is reproduced based on the stroke information and the erasure information,
The display control means, in a handwriting stroke reproduced in the stroke image based on the stroke information, a portion determined to be an erasure target based on the erasure information by a display mode different from a handwritten stroke other than the portion. A terminal device that is displayed on a stroke image. The stroke information and the erasure information further include time information related to a handwritten stroke,
The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information,
Filled in after the time of the first switching from the time zone in which the stroke information is generated to the time zone in which the erasure information is generated, and a location that is not an erasure target,
The terminal device according to claim 11, wherein the terminal device is displayed on the stroke image in a display mode different from a handwritten stroke other than the portion.   The terminal device according to claim 11, wherein the display control unit changes a display mode of the handwritten stroke by changing coloring. The display control means is based on an external input,
Of the handwritten strokes reproduced in the stroke image based on the stroke information, a location determined to be an erasure target based on the erasure information;
The display means displays only one of the portions that are entered after the time when the stroke information is generated and the time when the erasure information is first generated, and are not the portions to be erased. The terminal device according to claim 11, characterized in that: A program executed by a terminal device including storage means for storing stroke information including position information and time information related to a handwritten stroke and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke. There,
A program for causing the terminal device to function as display control means for displaying a stroke image in which the handwritten stroke at each predetermined time point is reproduced in time series on the display means based on the stroke information and the erasure information. .   The program according to claim 15, wherein the display control unit sets the last time of each of the predetermined time points to a time after the time when the stroke information or the erasure information was last generated.   The display control means sets each of the predetermined time points other than the last time point as a time point when the time period when the stroke information is generated is switched to the time period when the erasure information is generated. The program according to claim 16, characterized in that:   The display control means sets a time point other than the last time point among the predetermined time points to a time point when the time zone in which the stroke information is generated and the time zone in which the erasure information is generated, respectively. The program according to claim 16. The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information, a portion determined to be an erasure target based on the erasure information is displayed on the stroke image in a display mode different from the handwritten stroke other than the portion. The program according to any one of claims 15 to 18, characterized by: The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information,
Filled in after the time of the first switching from the time zone in which the stroke information is generated to the time zone in which the erasure information is generated, and a location that is not an erasure target,
The program as described in any one of Claims 15 thru | or 19 displayed on the said stroke image by the display mode different from the handwritten strokes other than the said location.   The program according to claim 19 or 20, wherein the display control means changes the display mode of the handwritten stroke by changing a coloring. A writing electronic pen processing unit that reads the coding pattern and generates writing entry information including position information corresponding to the coding pattern and time information corresponding to a time at which the position information was generated;
An erasing electronic pen processing unit that reads an encoded pattern and generates erasure entry information including position information corresponding to the encoded pattern and time information corresponding to a time at which the position information was generated;
A program executed by the terminal device of an electronic pen system, comprising: the terminal device that receives writing entry information from the writing electronic pen processing unit and the erasing entry information from the erasing electronic pen processing unit Because
Based on the writing entry information received from the writing electronic pen processing unit, the stroke information is generated and stored in the storage means, and based on the erasing entry information received from the erasing electronic pen processing unit The program according to any one of claims 15 to 21, further causing the terminal device to function as storage control means for generating the erasure information and storing it in the storage means. The electronic pen system further includes second display means for enlarging and displaying the display by the display means,
The display control means includes
The display of the second display means is controlled so that at least the stroke image is not displayed when the stroke images are displayed in time series on the display means. program. A program executed by a terminal device comprising storage means for storing stroke information related to a handwritten stroke and erasure information for specifying a handwritten stroke for which an erasure instruction has been given or a part of the handwritten stroke,
Based on the stroke information and the erasure information, the terminal device is caused to function as a display control means for displaying a stroke image reproducing the handwritten stroke on a display means,
The display control means, in a handwriting stroke reproduced in the stroke image based on the stroke information, a portion determined to be an erasure target based on the erasure information by a display mode different from a handwritten stroke other than the portion. A program characterized by being displayed on a stroke image. The stroke information and the erasure information further include time information related to a handwritten stroke,
The display control means includes
Of the handwritten strokes reproduced in the stroke image based on the stroke information,
Filled in after the time of the first switching from the time zone in which the stroke information is generated to the time zone in which the erasure information is generated, and a location that is not an erasure target,
The program according to claim 24, wherein the program is displayed on the stroke image in a display mode different from a handwritten stroke other than the portion.   The program according to claim 24 or 25, wherein the display control means changes a display mode of the handwritten stroke by changing a coloring. The display control means is based on an external input,
Of the handwritten strokes reproduced in the stroke image based on the stroke information, a location determined to be an erasure target based on the erasure information;
The display means displays only one of the portions that are entered after the time when the stroke information is generated and the time when the erasure information is first generated, and are not the portions to be erased. The program according to any one of claims 24 to 26, wherein: