JP6497266B2 - Erase medium and handwriting input system - Google Patents

Description

  The present invention relates to a handwriting input device using an input pen and an erasing medium.

  An example of a handwriting input device including a pressure-sensitive touch panel is described in Patent Document 1. In the handwriting input device, when a user performs handwriting input with a pen or the like on a sheet placed on a touch panel, the handwriting is acquired as an electronic handwriting and input to a PDA.

  Further, Patent Document 2 describes an example of an adhesive-use stripping tool that erases the content entered with a pencil or pen by transferring it to the surface of the adhesive material.

JP 2006-172230 A Registered Utility Model No. 3016175

  There is a case where the user wants to correct the content after placing paper on the touch panel and performing handwriting input. In such a case, the contents entered on the paper can be erased using a general eraser, but it is not possible to erase the contents entered as an electronic handwriting at the same time. In addition, when a normal eraser is used when erasing information input by handwriting on a sheet, erasure occurs. This may cause erroneous detection or error when electrically acquiring handwritten input information.

  The main object of the present invention is to provide a erasing medium for handwritten input information that can correctly erase information once handwritten.

  In one aspect of the present invention, an erasing medium used for a handwriting input device that detects handwriting input based on a change in capacitance is provided on a main body, an adhesive material provided on the main body, and an inner side of the adhesive material. And a conductive member provided.

  The erasing medium is used for erasing handwritten input information entered on a sheet in a handwriting input device. The adhesive material provided on the main body peels off the handwritten input handwriting and erases it from the paper by contacting the handwritten input portion of the paper. On the other hand, at the time of erasure, the erasure area is detected by detecting the proximity of the conductive member provided inside the adhesive material, and the handwritten input information included in the erasure area is electrically erased.

  One aspect of the erasing medium includes a roller portion that includes the adhesive material and the conductive member and rotates with respect to the main body. The conductive member is provided on the center side of the roller portion, and the adhesive material is provided on the outer peripheral side of the conductive member. In this aspect, the handwriting input handwriting is peeled off and erased from the paper by rotating the roller portion in contact with the area to be erased on the paper.

  In another aspect of the erasing medium, the conductive member is fixed to the main body, and the adhesive material is provided outside the conductive member. In this aspect, the handwriting input handwriting is peeled off from the paper and erased by pressing the adhesive material on the area to be erased on the paper or by tapping with an adhesive material.

  Another aspect of the present invention includes a paper, a pen, an erasing medium, a handwriting input device that detects content handwritten on the paper based on a change in capacitance, and a display unit. A handwriting input system comprising: a terminal device, wherein the terminal device receives handwriting input information from the handwriting input device when the handwriting input is performed on the paper with the pen, and is displayed on the display unit. When the handwritten input information on the sheet is erased by the erasing medium, the erased handwritten input information is displayed on the display unit in a manner that can be distinguished from the unerased handwritten input information.

  In the above handwriting input system, when a user performs handwriting input on paper using a pen, the input device detects handwritten input information and transmits it to the terminal device, and the handwritten input information received by the terminal device is displayed on the display unit. To do. On the other hand, when the user erases the information once handwritten by the erasing medium, the terminal device displays the erased handwritten input information on the display unit in a manner distinguishable from the handwritten input information that has not been erased. Thereby, the user can distinguish the part erased on the display unit and the part not erased.

1 shows a schematic configuration of a handwriting input system according to an embodiment of the present invention. It is a block diagram which shows the function structure of a handwriting input device. It is a block diagram which shows the function structure of a terminal device. It is a figure explaining the method of position correction of handwritten input information. The example of the entry data memorize | stored in a data storage part is shown. It is a flowchart of position correction. A mark forming method will be described. An example of the arrangement of marks is shown. It is sectional drawing of the modification of a handwriting input device. 2 schematically shows a second example of an erasing medium. 3 schematically shows a third example of an erasing medium. A display example of erased contents is shown.

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

[Constitution]
FIG. 1 shows a schematic configuration of a handwriting input system according to an embodiment of the present invention. The handwriting input system includes a handwriting input device (hereinafter simply referred to as “input device”) 10 and a terminal device 20. The input device 10 acquires information (hereinafter referred to as “handwritten input information”) entered on the paper 31 by the user with the pen 32 and transmits the information to the terminal device 20 by wireless communication. The terminal device 20 displays the handwritten input information received from the input device 10.

  The input device 10 includes a sensor sheet 11 and a circuit unit 18. The sensor sheet 11 is a capacitance type and has a rectangular shape. The circuit unit 18 is provided at a predetermined end of the input device 10 and forms a circuit constituting a communication unit, a storage unit, and the like, which will be described later.

  When inputting, the user places the paper 31 on the sensor sheet 11 and performs handwriting input (filling) on the paper with the pen 32. The paper may be plain or something may be printed in advance. The pen 32 is, for example, a pencil, a mechanical pencil, or the like, and it is only necessary that a conductive material is included in the core portion, that is, the portion that contacts the sensor sheet 11. The sensor sheet 11 detects a change in the capacitance of the internal electrode due to contact or proximity of the conductive material of the pen 32, and the position coordinates of the position where the pen 32 is in contact with the sensor sheet 11 via the paper 31 are obtained. Identify. By continuously detecting the coordinates of the contact position of the pen 32 with respect to the sensor sheet 11, characters, symbols, pictures, and the like handwritten by the user can be acquired.

  The terminal device 20 is a device for displaying handwritten input information acquired by the input device 10, and preferably has a certain display area corresponding to the paper 31. In FIG. 1, a tablet terminal device is illustrated as the terminal device 20, but the terminal device 20 may be a normal desktop PC or laptop PC.

  FIG. 2 shows a functional configuration of the input device 10. In addition to the sensor sheet 11, the input device 10 includes a communication unit 12, a timer 13, a memory 14, a data storage unit 15, and a control unit 16. The communication unit 12, the timer 13, the memory 14, the data storage unit 15, and the control unit 16 are provided in the circuit unit 18 illustrated in FIG.

  The communication unit 12 transmits the handwritten input information acquired by the input device 10 to the terminal device 20 by wireless communication such as Bluetooth (registered trademark). The timer 13 measures the current time.

  The memory 14 stores a program for correcting the position of handwritten input information, which will be described later. The memory 14 also functions as a work memory when performing position correction.

  The data storage unit 15 stores entry data including the entry position detected by the sensor sheet 11 when the user performs handwriting input. Details of the entry data will be described later.

  The control unit 16 executes the program stored in advance in the memory 14, thereby controlling the entire input device 10 and correcting the position of the handwritten input information.

  FIG. 3 shows a functional configuration of the terminal device 20. The terminal device 20 includes a display unit 21, a communication unit 22, and a control unit 23. The display unit 21 is a liquid crystal display, for example. The communication unit 22 communicates with the communication unit 12 of the input device 10 by wireless communication and receives handwritten input information from the input device 10. The control unit 23 controls the entire terminal device 20. Further, the control unit 23 performs processing for displaying the handwritten input information received from the input device 10 by the communication unit 22 on the display unit 21.

[Position correction]
As shown in FIG. 1, when the user places the paper 31 on the sensor sheet 11 of the input device 10 and performs handwriting input with the pen 32, the user usually places the paper 31 near the center of the sensor sheet 11. At that time, the user does not necessarily arrange the four sides of the paper 31 so as to be parallel to the four sides of the sensor sheet 11. In addition, unless the paper 31 is fixed to the sensor sheet 11 with a tape or the like, the paper 31 often shifts or rotates as the user continues to input by handwriting. Specifically, when a right-handed user continues handwriting input with the right hand, the paper 31 gradually shifts to the right, or the paper rotates in the vertical direction (clockwise or counterclockwise). Tend to. Therefore, in this embodiment, when the user starts handwriting input and while the handwriting input is continued, a shift of the paper 31 is detected, and the handwriting input information is corrected based on this. This is hereinafter referred to as “position correction”.

  Specifically, in this embodiment, a plurality of marks are formed on the paper 31 in advance, and by detecting these marks, the arrangement state of the paper 31, specifically the position of the paper 31 with respect to the sensor sheet 11 and the paper The inclination of 31 is detected. Then, based on the detected position and inclination of the sheet, the entry position detected by the sensor sheet 11 is corrected.

  First, correction regarding the position of the paper 31 with respect to the sensor sheet 11 will be described. FIG. 4A shows a state in which the paper 31 is arranged on the sensor sheet 11. As illustrated, the paper 31 is provided with marks M1 to M4 at four corners. In the following description, when the marks M1 to M4 are not distinguished, they are simply described as “mark M”, and when referring to a specific one, they are described as “mark M1”. For convenience of explanation, it is assumed that each mark M has a size corresponding to one coordinate point on the sensor sheet 11.

  The mark M is made of a conductive material, and is formed on the paper 31 with, for example, conductive ink. Therefore, when the paper 31 is placed on the sensor sheet 11, the input device 10 detects the position coordinates of the mark M on the sensor sheet 11. be able to.

  In FIG. 4A, a coordinate system (hereinafter, referred to as the lower left corner of the sensor sheet 11 as an origin (hereinafter referred to as “sensor origin”) Os and the lower side and the left side of the sensor sheet 11 as an X axis and a Y axis, respectively. (Also called “sensor coordinate system”). Further, the lower left corner of the paper 31 is the origin (hereinafter referred to as “paper origin”) Op, and the lower and left sides of the paper 31 are the x-axis and y-axis, respectively (hereinafter also referred to as “paper coordinate system”). .) Is defined.

  Now, assume that the paper 31 is placed at a certain position on the sensor sheet 11 as shown in FIG. In this example, it is assumed that the four sides of the paper 31 are substantially parallel to the corresponding four sides of the sensor sheet 11. The sensor sheet 11 detects the four marks M1 to M4 on the paper 31, and the control unit 16 acquires the position coordinates of the marks M1 to M4 in the sensor coordinate system. Here, as shown in FIG. 4A, assuming that the position coordinate of the paper origin Op is Op (a, b), the control unit 16 acquires the position coordinate of the mark M1 as the position coordinate of the paper origin Op. To do. In this case, if the position coordinate in the sensor coordinate system of the entry position by the pen 32 is P (X, Y), the position coordinate p (x, y) in the paper coordinate system of the entry position is given by the following expression.

p (x, y) = P (X−a, Y−b) (1)
In this way, by detecting the position of the mark M1 provided on the paper 31 and acquiring the position coordinate in the sensor coordinate system of the paper origin Op, the entry position in the sensor coordinate system is converted to the entry position in the paper coordinate system. be able to. Further, even if the paper 31 gradually shifts in the vertical and horizontal directions while the user continues to fill in, the input device can be obtained by continuously detecting the position of the mark M1 and performing conversion according to the equation (1). No. 10 can always acquire the entry position in the paper coordinate system correctly.

  When the sheet 31 is arranged on the sensor sheet 11, the sensor sheet 11 detects four position coordinates corresponding to the four marks M1 to M4, but the control unit 16 detects the four position coordinates detected. Of these, the position coordinate closest to the sensor origin Os may be determined as the position coordinate of the mark M1.

  Next, correction related to the inclination of the paper 31 will be described. FIG. 4B shows a state in which the paper 31 is arranged with an inclination θ counterclockwise with respect to the lower side of the sensor sheet 11. Note that the definitions of the sensor coordinate system, the paper coordinate system, and the like are the same as those in FIG.

  The sensor sheet 11 detects the four marks M1 to M4 on the paper 31, and the control unit 16 acquires the position coordinates of the marks M1 to M4 in the sensor coordinate system. Here, as shown in FIG. 4B, the position coordinate of the mark M1 in the sensor coordinate system, that is, the coordinate of the paper origin Op is Op (a, b), and the coordinate of the mark M2 in the sensor coordinate system is (c , D), the inclination θ is given by the following equation.

θ = tan ⁻¹ {(d−b) / (c−a)} (2)
Therefore, the control unit 16 can obtain a correct entry position in consideration of the inclination θ by rotating the entry position in the paper coordinate system obtained by Expression (1) by an angle θ clockwise.

  In this way, by detecting the positions of the marks M1 and M2 provided on the paper 31 and calculating the inclination θ of the paper 31, the correct entry position can be obtained even if the paper 31 is inclined. Even if the paper 31 gradually rotates while the user continues to fill in, the paper coordinates are always obtained by continuously detecting the positions of the marks M1 and M2, calculating the inclination θ, and performing correction. It is possible to correctly acquire the entry position in the system. In the above example, the inclination θ is obtained using the marks M1 and M2, but the inclination θ may be obtained using the marks M3 and M4.

  Next, data stored in the input device 10 will be described. FIG. 5 shows an example of entry data stored in the data storage unit 15 of the input device 10. The control unit 16 of the input device 10 acquires the current time from the timer 13 and stores entry data at predetermined time intervals (every second in the example of FIG. 5). The entry data includes “paper origin coordinates”, “tilt”, “entry coordinates in the sensor coordinate system”, and “entry coordinates in the paper coordinate system”. The “paper origin coordinates” are coordinates in the sensor coordinate system of the paper origin Op as described above. “Inclination” is the inclination θ of the lower side of the sheet 31 with respect to the lower side of the sensor sheet 11, that is, the X axis of the sensor coordinate system. As described above, the control unit 16 detects the position coordinates of the marks M1 to M4 in the sensor coordinate system using the sensor sheet 11, and calculates and stores the paper origin coordinate Op and the inclination θ based on these.

  “Entry coordinates in the sensor coordinate system” are position coordinates of the pen 32 on the sensor sheet 11. The “entry coordinates in the paper coordinate system” is the coordinates of the entry position by the pen 32 on the paper 31. As described above, the position correction using the paper origin coordinates and the inclination is performed on the entry coordinates in the sensor coordinate system. Required by doing. Then, the input device 10 transmits “entry coordinates in the paper coordinate system” to the terminal device 20 as handwritten input information. The terminal device 20 displays the received handwritten input information on the display unit 21.

  Although not shown in FIG. 5, the control unit 16 of the input device 10 may store the coordinates of the marks M1 to M4 detected at each time in the data storage unit 15 in addition to the entry data.

  Next, position correction processing will be described. FIG. 6 is a flowchart of position correction. This process is mainly executed by the control unit 16 of the input device 10.

  First, the control part 16 determines whether the handwriting input by the pen 32 is performed based on the output of the sensor sheet 11 (step S10). When there is no input with the pen 32 (step S10; No), a process is complete | finished.

  On the other hand, when the input with the pen 32 is performed (step S10; Yes), the control part 16 detects the position coordinate of the pen 32 (step S11). The position coordinates correspond to the entry coordinates in the sensor coordinate system, and are stored in the data storage unit 15 as shown in FIG.

  Next, the control unit 16 detects the position coordinates of the mark M based on the output from the sensor sheet 11 (step S12). Next, the control unit 16 calculates the paper origin coordinate Op and the inclination θ based on the position coordinates serving as the reference of the mark M by the above-described method (step S13). The calculated paper origin coordinates Op and inclination θ are stored in the data storage unit 15 as shown in FIG.

  Next, the control unit 16 corrects the entry coordinates in the sensor coordinate system based on the paper origin coordinate Op and the inclination θ as described above, and calculates the entry coordinates in the paper coordinate system (step S14). The calculated entry coordinates in the paper coordinate system are stored in the data storage unit 15 as shown in FIG. And the control part 16 transmits the entry coordinate in a paper coordinate system to the terminal device 20 as handwritten input information via the communication part 12 (step S15), and returns to step S10.

  In this way, while the handwriting input by the pen 32 continues, the processes of steps S11 to S15 are repeatedly executed, and the input coordinates in the paper coordinate system are transmitted to the terminal device 20 as handwritten input information and displayed on the display unit 21. . Even if the position of the paper 31 on the sensor sheet 11 gradually shifts during this time, the control unit 16 always calculates the entry coordinates in the paper coordinate system while updating the paper origin coordinates Op and the inclination θ. The handwritten input information is always displayed on the display unit 20 at the correct position and orientation.

[Mark formation method]
FIG. 7 shows an example of a method for forming the mark M on the paper 31. In the example of FIG. 7A, the mark M is formed by applying conductive ink to the surface of the paper 31. In the example of FIG. 7B, the mark M is formed by soaking the paper 31 with conductive ink. In the example of FIG. 7C, two sheets are overlapped to form a sheet 31, and the mark M is formed by sandwiching conductive ink between the two sheets.

  In this embodiment, any of the above methods may be applied. In addition, as long as the sensor sheet 11 can be detected with conductivity, the mark M may be formed by a method other than the above, and a method of arranging a metal piece on paper or the like may be used. It is also possible to use the mark M by using a conductive pen or the like to fill in check boxes that are printed in advance at the four corners or the like when the user starts filling in the form. In that case, it is preferable to store the symbol written in the check box as a specific shape and print the shape in a light color so as to prompt the user to trace it. In this way, the shape can be recognized using OCR or the like, and the mark M can be formed and specified each time it is used. The mark M preferably has a different arrangement position so that the front and back sides can be discriminated, or the shape itself is asymmetric between the front and back sides.

[Example of mark arrangement]
In the above embodiment, four marks M are formed at the four corners of the paper 31 as shown in FIG. 4, but the positions of the marks are not limited to this. An example of the arrangement of other marks is shown in FIG.

  FIG. 8A shows an example in which four marks M are formed inside the four corners of the paper 31. In this case, the control unit 16 of the input device 10 calculates the paper coordinate origin Op and the inclination θ in consideration of the deviation of each mark M from the corner of the paper 31.

  8B and 8C are examples in which the vertical positions of the two marks M on the right side in the drawing are different from those on the left two marks M. On the other hand, the mark M is formed asymmetrically. FIG. 8D shows an example in which the right mark M is single, and similarly, the mark M is formed asymmetrically with respect to the left and right center lines of the paper 31. In this way, by forming the mark M asymmetrically with respect to the center line of the paper 31, it is possible to distinguish the front surface and the back surface of the paper 31. That is, the control unit 16 of the input device 10 can determine which of the front surface and the back surface of the paper 31 is handwritten based on the detected relative positional relationship between the plurality of marks M. .

  Further, the type of the paper may be determined depending on the form in which the mark M is provided on the paper 31. That is, the form of the mark M formed on the paper 31 is changed according to the type of the paper 31. Specifically, in one method, the shape of each mark M is changed according to the type of the paper 31. For example, a triangular mark M is provided on the paper 31 of paper A (type A), and a square mark M is provided on the paper 31 of paper B (type B). In another method, the positional relationship of the plurality of marks M is changed according to the type of the paper 31. For example, four marks M are formed on the paper A so that they form a rectangle, and three marks M are formed on the paper B so that they form a triangle. Further, by combining the above two methods, the type of the paper 31 may be distinguished by a combination of the shape of each mark M and the shape formed by a plurality of marks. For example, four triangular marks M are formed on the paper A so that they form a quadrilateral, and four square marks are arranged on the paper B so that they form a quadrilateral. This makes it possible to determine the type of paper based on the form of the mark M. Note that the process of determining the type of the paper 31 based on the form of the plurality of marks M may be performed by either the input device 10 or the terminal device 20. That is, the control unit 16 of the input device 10 may determine the paper type based on the information of the plurality of marks M, and transmit the result to the terminal device 20. Instead, the control unit 23 of the terminal device 20 may receive information related to the plurality of marks M from the input device 10 to determine the type of paper.

  Furthermore, when the paper type can be determined as described above, the control unit 23 of the terminal device 20 may automatically start an application set in advance for each paper type. For example, when the paper 31 being used is determined to be the paper A, the control unit 23 of the terminal device 20 activates the application A, and when the paper 31 being used is determined to be the paper B, the terminal device The control unit 20 starts the application B. The correspondence relationship between the paper type and the application may be stored in a storage unit (not shown) of the terminal device 20.

[Modification of input device]
FIG. 9 is a cross-sectional view of an input device 10x according to a modification. In the input device 10x, the upper and lower sides of the sensor sheet 11 are covered with a transparent resin 17 such as acrylic. Thereby, the part of the sensor sheet 11 of the input device 10 has a certain degree of flexibility, and can be used by being sandwiched between books, for example, like an underlay.

[Erase media]
In the above embodiment, the user can write on the paper 31 with the pen 32. However, if the user wants to correct the entered item, an erasing medium such as an eraser may be used.

(First example)
In the first example, a conductive material is included in a normal eraser material as an erasing medium. For example, a conductive material is kneaded into an eraser material. If the eraser erases the portion of the paper to be deleted, the items entered on the paper with a pencil or the like are erased by a normal eraser function. On the other hand, the sensor sheet 11 detects the conductive material contained in the eraser and detects the range where the eraser has moved as an erase range, and the control unit 16 erases the entry data stored in the data storage unit 15. What belongs to the range may be deleted. If the entry data after the part belonging to the erasure range is erased is retransmitted to the terminal device 20, the erasure can be reflected in the image displayed on the terminal device 20.

  Alternatively, the control unit 16 may store data indicating the erasure range as erasure data in the data storage unit 15 separately from the entry data. In this case, the erasure data is transmitted to the terminal device 20, and the erasure is reflected in the image displayed on the terminal device 20 by the terminal device 20 changing the erasure range indicated by the erasure data to a blank state. it can.

  Further, instead of including a conductive material in the eraser material as described above, a conductive material may be wrapped around the outer periphery of a normal eraser, or an eraser case may be made of a conductive material.

(Second example)
An erasing medium according to the second example is shown in FIG. In the second example, the erasing medium is erased by peeling the handwritten handwritten on the paper with an adhesive material. Specifically, the erasing medium 40 according to the second example is a roller type, and includes a main body 41 and a roller portion 42. The roller unit 42 is configured to be rotatable with respect to the main body. That is, as shown in FIG. 10A, when the user moves the erasing medium 40 in the direction of the arrow 49 in the completed area on the paper 31, the roller 42 rotates while being in contact with the paper 31. The roller unit 42 has adhesiveness, and rotates in contact with the paper 31 to peel off a pencil handwriting on the paper 31 and erase written characters and the like.

  FIG. 10B shows the configuration of the roller portion 42. The roller portion 42 includes a columnar core member 43 and a cylindrical outer peripheral portion 44 provided so as to cover the core member 43. The core material 43 is rotatably fixed to the main body 41 of the erasing medium 40 and has a function as a rotation shaft of the roller portion 42. A cross section of the outer peripheral portion 44 is shown in FIG. The outer peripheral portion 44 includes a cylindrical conductive member 45 provided on the outer periphery of the core member 43 and a cylindrical adhesive member 46 provided on the outer periphery of the conductive member 45.

  The adhesive material 46 can be formed of a rubber-like elastic body that can be repeatedly adhered and peeled, such as polyurethane resin. When the roller unit 42 is rotated in the completed area of the paper 31, the pencil handwriting on the paper 31 is transferred to the adhesive material 46 of the roller unit 42 and peeled off, and the written characters and the like are erased. Therefore, unlike a normal eraser, no erasure occurs. The peeled pencil handwriting is transferred to the adhesive material 46. However, if the surface of the adhesive material 46 is washed with water or a detergent, the transferred handwriting can be dropped. Thereby, the adhesive material 46 recovers the original adhesive force and can be used again.

  On the other hand, the entry data is electrically erased by the conductive member 45 of the roller portion 42. Specifically, the sensor sheet 11 detects the proximity of the conductive member 45 of the erasing medium 40 based on a change in capacitance, and detects the range in which the erasing medium 40 has moved as the erasing range. The control unit 16 erases the entry data stored in the data storage unit 15 that belongs to the erase range. If the entry data after the part belonging to the erasure range is erased is retransmitted to the terminal device 20, the erasure can be reflected in the image displayed on the terminal device 20. As in the first example, the control unit 16 may store data indicating the erasure range as erasure data in the data storage unit 15 separately from the entry data.

(Third example)
An erasing medium according to the third example is shown in FIG. Also in the third example, the erasing medium is erased by peeling the handwriting handwritten on the paper with an adhesive material. Specifically, the erasing medium 50 is a pressing erasing type, and includes a main body 51 and a contact portion 52. As shown in FIG. 11A, when the user hits the contact portion 52 of the erasing medium 50 on the paper 31 in the completed area on the paper 31 and taps it, the pencil handwriting on the paper 31 is peeled off and entered. Delete the characters etc.

  FIG. 11B shows a cross section of the contact portion 52. The contact portion 52 has a conductive member 53 inside, and the outer periphery thereof is covered with an adhesive material 54. The adhesive material 54 is made of a soft material such as polyurethane resin, and by pressing against the surface of the paper 31, it is possible to peel off the pencil handwriting and erase characters and the like. Therefore, unlike a normal eraser, no erasure occurs. As in the second example, the pencil handwriting peeled off from the paper 31 is transferred to the adhesive material 54, but can be reused by washing it away with water or detergent.

  On the other hand, the entry data is electrically erased by the conductive member 53 in the contact portion 52 as in the second example. Specifically, the sensor sheet 11 detects the proximity of the conductive member 53 of the erasing medium 50 based on a change in capacitance, and detects the range in which the erasing medium 50 has moved as the erasing range. The control unit 16 erases the entry data stored in the data storage unit 15 that belongs to the erase range. If the entry data after the part belonging to the erasure range is erased is retransmitted to the terminal device 20, the erasure can be reflected in the image displayed on the terminal device 20. As in the first example, the control unit 16 may store data indicating the erasure range as erasure data in the data storage unit 15 separately from the entry data.

(Display example when using erase media)
Next, a display example by the terminal device 20 when an erasing medium is used will be described. As described above, the entry data input by the input device 20 is transmitted to the terminal device 20 and displayed on the display unit 21 as handwritten input information. Therefore, when the handwritten input information displayed on the display unit 21 is erased by the erasing medium, the input device 10 transmits the erased entry data (hereinafter also referred to as “erased data”) to the terminal device 20. The terminal device 20 erases handwritten input information corresponding to the erased data on the display unit 21. Thereby, when the handwritten input information is erased by the erasing medium, the erasure can be immediately reflected in the display on the display unit 21.

  However, it may be convenient not to erase the handwritten input information erased by the erasing medium immediately on the display unit 21 but to keep it temporarily displayed for a while. For example, in a situation where the user enters an answer to a question, it may be convenient to rewrite while viewing the content that was first entered when rewriting after entering the answer once.

  Therefore, the terminal device 20 may continue to display the handwritten input information corresponding to the erased data on the display unit 21 in such a correspondence that it can be distinguished from the handwritten input information that has not been erased. For example, as shown in FIG. 12A, the handwritten input information “a pen” corresponding to the erased data is displayed semi-transparently or displayed in a different color so that the handwritten data that has not been erased is displayed. It is displayed separately from the input information. Alternatively, as shown in FIG. 12B, the portion of the handwritten input information corresponding to the erased data may be surrounded by a frame or the background color may be changed. Furthermore, an eraser mark or icon may be displayed on the handwritten input information corresponding to the erase data to indicate that the location has been erased by the erase medium.

  Next, the timing at which the handwritten input information corresponding to the erased data is erased from the display unit 21, that is, the timing at which the erase is reflected in the display on the display unit 21 will be described.

  In one example, the terminal device 20 erases the handwritten input information corresponding to the erased data on the display unit 21 after a predetermined time has elapsed after receiving the erased data information from the input device 10.

  As another example, the terminal device 20 erases handwritten input information corresponding to erased data when re-entry is performed on the erased data. Specifically, when the answer column for the question is determined in advance on the paper 31, when the user first enters an answer in the answer column, the handwritten input information corresponds to the answer column on the display unit 21. Displayed in position. Next, when the contents entered by the user are erased with an erasing medium, handwritten input information corresponding to the erased data is displayed in a manner that can be distinguished from other entered contents, for example, as shown in FIGS. When the user enters a new answer in the answer field on the paper 31, the handwritten input information corresponding to the erased data is erased, and only the handwritten input information corresponding to the new answer is displayed on the display unit 21. Like that.

  If there is no answer column or the like on the sheet 31, when new contents are overwritten on the erased data (more specifically, a new entry is made in the area erased by the erase medium). When done, the handwritten input information corresponding to the erased data may be erased from the display unit 21.

[Modification]
In the above embodiment, the input device 10 and the terminal device 20 transmit and receive data by wireless communication. Instead, the input device 10 and the terminal device 20 may be connected by a cable or the like, and necessary data may be transmitted and received by wired communication.

10, 10x Handwriting input device 11 Sensor sheet 15 Data storage unit 16 Control unit 20 Terminal device 31 Paper 32 Pen 40, 50 Erase medium 45, 53 Conductive member 46, 54 Adhesive material

Claims (6)

An erasing medium used in a handwriting input device that detects handwriting input based on a change in capacitance,
The body,
An adhesive provided on the main body;
A conductive member provided inside the adhesive material;
An erasing medium comprising:   The erasing medium according to claim 1, further comprising a roller portion that includes the adhesive material and the conductive member and rotates with respect to the main body.   The erasing medium according to claim 2, wherein the conductive member is provided on a center side of the roller portion, and the adhesive material is provided on an outer peripheral side of the conductive member.   The erasing medium according to claim 1, wherein the conductive member is fixed to the main body, and the adhesive material is provided outside the conductive member.   The said adhesive material contacts the part handwritten on the paper with a pen, and erases the content handwritten on the paper by peeling from the paper. The erasing medium described in the item. A paper, a pen, an erasing medium according to any one of claims 1 to 5, and a handwriting input device that detects content handwritten on the paper with the pen based on a change in capacitance A handwriting input system comprising a terminal device having a display unit,
The handheld device receives handwritten input information from the handwritten input device when the handwritten input is made with the pen on the paper, and displays the handwritten input information on the paper. A handwriting input system, wherein when erased by an erasing medium, the erased handwritten input information is displayed on the display unit in a manner distinguishable from unerased handwritten input information.