WO2021246019A1 - Position detection device, page detection method, and sheet-like recording medium - Google Patents

Abstract

[Problem] To enable detection of page information of a certain page during writing without providing a projecting part for page detection, without using an optical or magnetic detection means or a sensor that reads a code such as a two-dimensional code, and without user operation. [Solution] A position detection device 10 according to the present invention detects a position indicated by a stylus Sa configured to be usable for visible handwriting on a notepad P1 placed on a touch surface 10a. The position detection device 10 comprises a sensor that senses a page identification member for identifying each page constituting a plurality of pages placed on the notepad P1, and a control circuit connected to the sensor. The page identification member is configured by a conductor, and the sensor is configured to detect the conductor using a capacitive sensing method. The control circuit is configured to be capable of identifying the page being handwritten with the stylus Sa in response to the detection of the conductor by the sensor.

Description

Position detection device, page detection method, and sheet-like recording medium

The present invention relates to a position detection device, a page detection method, and a sheet-shaped recording medium.

There is known a handwritten data drawing device that enables the handwriting to be electronically captured as handwritten data when writing characters or pictures on a sheet-shaped recording medium such as a report sheet. This type of device is generally configured to include a position detector such as a digitizer and a stylus having both a function as an indicator and a function as a ballpoint pen. The sheet-shaped recording medium is arranged on the touch surface of the position detecting device. According to this configuration, when the user writes characters or pictures on the surface of the sheet-shaped recording medium using the ballpoint pen function of the stylus, the position detection device acquires a series of coordinate data indicating the movement trajectory on the touch surface of the stylus. can do. The series of coordinate data acquired in this way becomes handwritten data indicating the handwriting of the electronic pen.

By the way, the sheet-shaped recording medium used in the handwritten data drawing device may have a plurality of pages such as a bookbinding notebook. In this case, the handwritten data drawing device needs to create the handwritten data separately for each page. Otherwise, the handwriting written on each of the plurality of pages of the sheet-shaped recording medium will overlap in one page on the screen. In this regard, Patent Document 1 provides a position detection device with an operation button for switching a file for storing coordinate data to a new file, so that a handwritten data file is created for each page. The technology is disclosed. Further, in Patent Document 2, a barcode indicating a document name and a page number is printed in advance on each page of a sheet-shaped recording medium, and the barcode is read by a code reader to display the page being written by the user. The technique for discriminating is disclosed.

Patent No. 600480 Japanese Unexamined Patent Publication No. 2001-14771

However, in the technique of Patent Document 1, if the user forgets to press the operation button, the handwriting written on each of the plurality of pages of the sheet-shaped recording medium is displayed so as to overlap in one page on the screen. Become. Further, in the technique of Patent Document 2, a protruding portion for a code reader is formed on the surface on which a sheet-shaped recording medium is placed, which is not beautiful in terms of design.

It is conceivable that the user can identify the page being written by optically detecting the holes provided in each page of the sheet-shaped recording medium, but the intensity of the reflected light is measured by radiating light from a dedicated light source. As a result, it becomes necessary to provide a complicated structure for transmitting and receiving light. It is conceivable to use external light such as indoor lighting or sunlight instead of the dedicated light source, but the detection accuracy depends on the intensity of the external light.

It is also conceivable to add a code such as a two-dimensional code indicating the page to the surface of each page and read this code with a sensor to identify the page being written by the user. In this method, this code is used. The reading sensor must be placed so that it covers the surface of the page, which can interfere with page turning.

Furthermore, a method of arranging a magnetic material on each page to magnetically identify page turning is conceivable, but considering the spread of the magnetic field, the number of pages that can be superimposed is greatly limited.

Therefore, one of the objects of the present invention is to provide a position detecting device, a printer, and a page detecting method capable of identifying a page being written while avoiding the above-mentioned problems.

The position detection device according to the present embodiment includes a mounting surface on which a sheet-shaped recording medium configured so that a plurality of pages are superimposed on each other is mounted, and the sheet mounted on the above-mentioned mounting surface. A position detection device that detects the position indicated by the stylus in response to a handwriting operation on the sheet-shaped recording medium placed on the above-mentioned mounting surface by a stylus configured to be visually handwritten on the state recording medium. A sensor that senses a page identification member for identifying each page constituting the plurality of pages arranged on the sheet-shaped recording medium placed on the above-mentioned mounting surface, and a sensor connected to the sensor. The page identification member is composed of a conductor, and the sensor is configured to detect the conductor by a capacitance method. The position detecting device is configured so that the target page of the handwriting operation by the stylus can be identified in response to the detection of the conductor arranged on the sheet-shaped recording medium by the sensor.

The page detection method described in this embodiment makes it visible to the sheet-shaped recording medium placed on the mounting surface on which the sheet-shaped recording medium configured so that a plurality of pages are superimposed on each other is placed. A page detection method for detecting a page corresponding to a handwriting operation on the sheet-shaped recording medium placed on the front-described stylus using a handwritten stylus, wherein the stylus is placed on the front-end surface. A conductor for identifying each page constituting the plurality of pages arranged on the sheet-shaped recording medium placed on the above-mentioned mounting surface corresponding to the distance from the sheet-shaped recording medium. The page identification member composed of the stylus is sensed by the capacitance method, and the target page of the handwriting operation by the stylus can be identified in response to the detection of the conductor arranged on the sheet-shaped recording medium by the sensor. It is a page detection method characterized by being configured.

The sheet-shaped recording medium described in this embodiment is a sheet-shaped recording medium configured such that a plurality of pages are superimposed on each other, and has a mounting surface on which the sheet-shaped recording medium is placed and the sheet-shaped recording medium. It is used together with a page turning state detection device equipped with an electrostatic sensor for recognizing each page of a recording medium, and a page identification member for identifying each page constituting the plurality of pages is arranged. At the same time, since the page identification member is composed of a conductor, a sheet-shaped recording medium configured such that a plurality of pages are superimposed on each other based on the detection state of the conductor by the electrostatic sensor. It is a sheet-shaped recording medium characterized in that it is configured so that pages corresponding to page turning can be recognized.

According to the present invention, without providing a protruding portion for page detection, without using an optical or magnetic detection means or a sensor that reads a code such as a two-dimensional code, and without user operation. It becomes possible to detect the page information of the page being written.

It is a figure which shows the position detection apparatus 10 and the tablet terminal 30 by 1st Embodiment of this invention. (A) is a diagram showing an example of identification information pre-written on each page of the notepad P1 having all five pages, and (b) is a position when the user is writing on each page of (a). It is a figure which shows the heat map generated by the detection device 10. (A) is a diagram showing another example of identification information pre-written on each page of the notepad P1 having all five pages, and FIG. 3 (b) is a diagram in which the user writes on each page of FIG. 3 (a). It is a figure which shows the heat map generated by the position detection apparatus 10 while it is. It is a figure which shows the internal structure of the position detection device 10 and the tablet terminal 30. It is a figure which shows the detailed structure of a sensor 15. It is a figure which shows the handwritten data output from a sensor controller 16, the file for storing the handwritten data, and the stroke data stored in the memory 35 by a stroke builder 33. It is a figure which shows the principle of heat map generation by a sensor controller 16. It is a flow chart of the process performed by the sensor controller 16 according to the 1st Embodiment of this invention. It is a figure which shows the internal structure of the position detection apparatus 10 and the tablet terminal 30 by the 2nd Embodiment of this invention. It is a figure which shows the detailed structure of a sensor 20, 21 and a stylus Sb. It is a flow chart of the process performed by the sensor controller 16 according to the 2nd Embodiment of this invention. It is a figure which shows the internal structure of the position detection apparatus 10 and the tablet terminal 30 by the 3rd Embodiment of this invention. It is a figure which shows the sheet-shaped recording medium P2 according to the 3rd Embodiment of this invention, and the method of writing the identification information in the sheet-shaped recording medium P2. It is a schematic block diagram which shows the functional block of a printer 60. It is a flow chart of the process performed by the sensor controller 16 according to the 3rd Embodiment of this invention.

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

FIG. 1 is a diagram showing a position detecting device 10 and a tablet terminal 30 according to the first embodiment of the present invention. The position detection device 10 has a built-in projection type capacitance type sensor (PCAP. Electrostatic sensor), and is a device that detects the position of the stylus Sa on the illustrated touch surface 10a by this sensor. The stylus Sa is compatible with the active electrostatic method. It functions as an indicator for instructing a position on the touch surface 10a, and also functions as a writing instrument (for example, a ballpoint pen) for visually leaving a handwriting on the surface of a sheet-shaped recording medium. The tablet terminal 30 is a computer having a touch screen 31 corresponding to touch input. The position detection device 10 and the tablet terminal 30 are connected to each other by wireless communication such as Bluetooth (registered trademark) or wired communication such as USB.

The X direction and the Y direction shown in FIG. 1 are directions corresponding to the lateral direction and the depth direction, respectively, when viewed from the user of the position detecting device 10. The position detecting device 10 has a rectangular shape in which one side in the Y direction is longer than one side in the X direction, and as shown in FIG. 1, a rectangular note pad P1 slightly smaller than the position detecting device 10 is touched by the touch surface 10a. It is used while mounted on top of it. That is, the touch surface 10a of the position detecting device 10 is configured to function as a mounting surface on which a sheet-shaped recording medium configured so that a plurality of pages are superimposed on each other is placed. As will be described in detail later, when the user writes characters or pictures on the surface of the notepad P1 using the stylus Sa as a writing instrument, the position detecting device 10 detects the locus of the stylus Sa as a series of coordinate data. The tablet terminal 30 acquires this series of coordinate data from the position detection device 10, generates stroke data, and displays it on the touch screen 31. FIG. 1 shows a state in which the character string of "MAKING IDEAS" written on the notepad P1 by the user by these processes is displayed on the touch screen 31 of the tablet terminal 30.

As shown in FIG. 1, the position detecting device 10 includes a power button 11, a power lamp 12, a recording medium fixing unit 13, and a stylus holding unit 14. Of these, the power button 11 is a switch for turning on / off the power of the position detecting device 10. Further, the power lamp 12 is a lamp that lights up when the power of the position detecting device 10 is on and turns off when the power of the position detecting device 10 is off.

The recording medium fixing portion 13 is an opening configured so that the mount of the notepad P1 as an example of the sheet-shaped recording medium can be inserted. The user fixes the notepad P1 to the position detecting device 10 by inserting the mount of the notepad P1 into the recording medium fixing portion 13. The stylus holding portion 14 is a recess for fixing the stylus Sa. When the stylus Sa is not used, the user inserts the clip of the stylus Sa into the recording medium fixing portion 13 and fits the end portion of the stylus Sa into the recess of the stylus holding portion 14 to position the stylus Sa 10. Fix to.

As a basic operation, the position detection device 10 is configured to accumulate a series of coordinate data sequentially detected in one file. Therefore, if the user writes on a plurality of pages while turning over the notepad P1, the coordinate data related to the handwriting of different pages is included in one file. When the series of coordinate data accumulated in this way is displayed on the touch screen 31 of the tablet terminal 30, the handwriting on a plurality of pages is displayed in an overlapping manner.

Since this cannot withstand actual use, the position detection device 10 identifies the page being written by the user, and changes the file that stores the coordinate data each time the page changes, for example, switching pages and performing coordinate data. Is configured to be associated. To detect the page information of the page being written, different identification information (page identification member) is written in advance on each page of the notepad P1, and this identification information is transmitted to the position detection device 10 through electrical interaction. It is realized by making it read. According to this, the position detecting device 10 can detect the page information of the page being written without providing the protruding portion for page detection and without the user's operation. Therefore, since it is possible to create a file containing a series of coordinate data for each page, it is possible to prevent the handwriting on a plurality of pages from being overlapped and displayed on the touch screen 31.

FIG. 2A is a diagram showing an example of identification information written in advance on each page of the notepad P1 having 5 pages in total. The identification information according to this example is composed of conductive marks M that make the pages distinguishable from each other. The conductive mark M is formed by arranging (printing) a conductive material on each page at the manufacturing stage of the notepad P1, and since it is printed in a different manner for each page, the identification information of each page. Functions as. The conductive material used for printing the conductive mark M is preferably a transparent material such as ITO (Indium Tin Oxide), but the conductive mark M is formed by using an opaque conductive material. May be good. The reading (sense) of the conductive mark M by the position detecting device 10 is performed by the same principle as the finger detection by the capacitance method. For example, it is performed by generating a heat map showing the position of the conductor in the touch surface 10a and extracting the conductive mark M from the heat map.

Explaining in detail the configuration of the conductive mark M shown in FIG. 2A, first, the conductive mark M printed on the first page, which is the top page, is on the left side when viewed from the user of the notepad P1. It is composed of five diagonal lines lined up along the long side. The conductive mark M printed on the second page is composed of four diagonal lines formed by removing one of the lowest side (user side) from the conductive mark M on the first page. Similarly, the conductive mark M printed on the nth page (n ≧ 2) is a 6-n diagonal line obtained by removing the lowermost one from the conductive mark M on the n-1 page. Consists of.

FIG. 2B is a diagram showing a heat map generated by the position detecting device 10 when the user is writing on each page of FIG. 2A. As shown in the figure, when the user is writing on the first page, for example, the conductor detected by the position detecting device 10 has the shape of five diagonal lines arranged along the left end of the touch surface 10a. Further, when the user writes on the second page, the conductor detected by the position detecting device 10 has the shape of four diagonal lines arranged along the left end of the touch surface 10a. Similarly, when the user writes on the nth page (n ≧ 2), the conductor detected by the position detecting device 10 has the shape of 6-n diagonal lines arranged along the left end of the touch surface 10a. Become. By arranging the conductors included in each page in this way, for example, the detection results of each page by the position detecting device 10 can be made different. Therefore, it is possible to identify the page written by the user.

Information indicating the position and shape of the conductive mark M printed on each page of the notepad P1 and the content of the detected conductive mark M (for example, the number of diagonal lines) are being written to the position detecting device 10. The correspondence table associated with the page is stored in advance. The position detection device 10 that generated the heat map as shown in FIG. 2B first performs geometric shape matching based on the information indicating the position and shape of the conductive mark M stored in advance. Extracts the conductive mark M contained in the generated heat map. Next, the position detecting device 10 detects the page information of the page being written by referring to the corresponding table based on the extracted conductive mark M. As a result, the position detecting device 10 also functions as a page turning state detecting device.

Table 1 is a diagram showing an example of a correspondence table stored in the position detection device 10. The table shows an example in which the conductive mark M shown in FIG. 2A is used. As shown in Table 1, the correspondence table according to this example is configured to store the number of diagonal lines constituting the conductive mark M in association with the page information of the page being written. Therefore, the position detecting device 10 can detect the page information of the page being written from the number of diagonal lines included in the conductive mark M extracted from the heat map.

Here, FIG. 3A is a diagram showing another example of the identification information written in advance on each page of the notepad P1 having all five pages, and FIG. 3B is a diagram showing each of FIGS. 3A. It is a figure which shows the heat map generated by the position detection apparatus 10 while the user is writing on a page. In this example, the conductive mark M on each page is composed of only one diagonal line, but the position is different depending on the page, and as a result, the same heat map as in FIG. 2B is obtained. .. Therefore, the position detecting device 10 can detect the page information of the page being written by the same processing as in the case of using the conductive mark M in FIG. 2A. As described above, the specific embodiment of the conductive mark M is not limited to one. In short, a plurality of conductors arranged on a sheet-shaped recording medium composed of a plurality of pages are configured to be capacitively detected by the position detecting device 10, and the writing page can be identified. As described above, it is sufficient that a plurality of conductors are arranged on the sheet-shaped recording medium.

FIG. 4 is a diagram showing the internal configurations of the position detection device 10 and the tablet terminal 30. As shown in the figure, the position detecting device 10 further includes a sensor 15, a sensor controller 16, a memory 17, and a wireless communication unit 18. Further, the tablet terminal 30 includes a wireless communication unit 32, a stroke builder 33, an editor 34, and a memory 35 in addition to the touch screen 31 shown in FIG.

The sensor 15 is a projection type capacitance type sensor (PCAP) corresponding to the position detection of the stylus Sa by the active electrostatic method and the position detection of the conductor by the capacitance method. The sensor 15 is arranged on the back surface side of the sheet-shaped recording medium mounted on the mounting surface of the position detecting device 10, and senses the conductive mark M as a page identification member.

FIG. 5 is a diagram showing a detailed configuration of the sensor 15. As shown in the figure, the sensor 15 is configured to have a plurality of linear electrodes 15x, 15y arranged so as to cover the entire touch surface 10a. The plurality of linear electrodes 15x are linear electrodes extending in the Y direction, and are arranged at equal intervals in the X direction orthogonal to the Y direction. The plurality of linear electrodes 15y are linear electrodes extending in the X direction, and are arranged at equal intervals in the Y direction. Each of the plurality of linear electrodes 15x and 15y is connected to the sensor controller 16.

Return to Fig. 4. The sensor controller 16 is a control circuit that detects the position of the stylus Sa using the sensor 15 and also receives the data transmitted by the stylus Sa, and is composed of an integrated circuit. The position detection of the stylus Sa is performed by the active electrostatic method. The sensor controller 16 also generates the heat map described above by detecting the position of the conductor in the touch surface 10a using the sensor 15, and based on the result, detects the page information of the page being written by the user. It also performs the processing to be performed.

The memory 17 is a storage device configured to manage data in file units in this example. The sensor controller 16 is configured to write coordinate data indicating the position of the stylus Sa detected by the active electrostatic method and data received from the stylus Sa (hereinafter collectively referred to as “handwritten data”) to a file in the memory 17. Will be done. As a result, a series of handwritten data indicating the user's handwriting is accumulated in the file. The corresponding table described above is also stored in the memory 17.

FIG. 6 is a diagram showing handwritten data output from the sensor controller 16 and a file for storing the handwritten data. The sensor controller 16 according to this example uses coordinate data (X, Y) indicating the position of the stylus Sa, a pen pressure value P received from the stylus Sa, switch information SW1 and SW2 (described later), and a time T at which the position is detected. It is configured to generate handwritten data including the indicated time stamp information and output it to the memory 17. In the following, the explanation will be continued on the premise of this example.

When the power of the position detection device 10 is turned on, and when the page detected based on the reading result of the identification information changes (that is, when the page being written is changed). ), It is configured to generate a new file in the memory 17. In FIG. 6, the file # 1 is a file generated in response to the power-on of the position detection device 10, and the files # 2 and # 3 are generated in response to a page change occurring in the page being written. File. When the sensor controller 16 generates a new file, the sensor controller 16 changes the output destination of the handwritten data to that file. As a result, a file of handwritten data is generated for each page. It is also possible to generate handwritten data over a plurality of pages as one file by associating the information indicating the page with the handwritten data generated in time series. Further, by storing the information indicating the time when the handwritten data is generated (time stamp information) in association with each other, the processing / editing of the handwritten data can be effectively processed.

Return to Fig. 4. The wireless communication unit 18 is a functional unit that takes out a file stored in the memory 17 and transmits it to the tablet terminal 30. The file retrieval and transmission by the wireless communication unit 18 may be executed in response to a transmission instruction from the tablet terminal 30, or may be executed in response to a user operation in the operating means provided in the position detection device 10. You may. Further, when the position detection device 10 and the tablet terminal 30 are close to a communicable distance, transmission may be automatically executed. Further, the wireless communication unit 18 is not a file unit, but each time the handwritten data for one coordinate is stored in the memory 17 by the sensor controller 16, the handwritten data is stored together with the information specifying the page to which the handwritten data is written. Data may be transmitted. By doing so, it becomes possible to display the handwritten data in real time on the touch screen 31 of the tablet terminal 30. In this case, file management will be performed on the tablet terminal 30 side.

Moving to the tablet terminal 30, the wireless communication unit 32 receives handwritten data from the position detection device 10 and supplies it to the stroke builder 33. The stroke builder 33 generates stroke data, which is vector data for drawing, based on a series of handwritten data supplied from the wireless communication unit 32, and stores the stroke data in the memory 35.

FIG. 6 also shows the stroke data stored in the memory 35 by the stroke builder 33. As shown in the figure, the stroke data is data including one or more handwritten data, and the stroke builder 33 is configured to collectively store one or more stroke data for each file in the memory 35.

The method of generating stroke data by the stroke builder 33 will be explained in detail. In order to generate stroke data from a series of handwritten data, it is first necessary to determine the break between strokes. The stroke builder 33 determines this division by referring to the pen pressure value P in each handwriting data. That is, the unit handwriting data in which the corresponding pen pressure value P is equal to or less than a predetermined value such as zero is acquired when the hover state, and therefore does not contribute to the handwriting. Therefore, the stroke builder 33 excludes such handwritten data from the generation target of the stroke data, and determines that the place where the excluded handwritten data is included is the stroke delimiter. Then, one stroke data is generated by a set of one or more handwritten data detected by this delimiter.

When the stroke builder 33 generates the stroke data, the stroke builder 33 adds order information to each of the generated series of stroke data by referring to the time stamp information of each handwritten data. As a result, each stroke data in the file stored in the memory 35 is ordered in the writing order. In the example of FIG. 6, the data written as "order n" (n is a natural number) is the order information, and the natural number n indicates the writing order.

The editor 34 has a function of extracting a file stored in the memory 35, rendering each stroke data contained therein, and displaying the result on the touch screen 31, and a user's touch operation on the touch screen 31. It is configured to have a function of recognizing and performing processing according to the content.

Next, the detection of the stylus Sa and the generation of the heat map performed by the sensor controller 16 will be described in detail.

First, the detection of the stylus Sa will be described with reference to FIG. 5. The sensor controller 16 periodically uplinks using all of the plurality of linear electrodes 15x (or the plurality of linear electrodes 15y) shown in FIG. It is configured to send a link signal. The uplink signal is a signal having a role of notifying the stylus Sa of the transmission timing of the downlink signal and a role of transmitting a command to the stylus Sa.

The stylus Sa that received the uplink signal transmits the downlink signal at the timing indicated by the uplink signal. If the stylus Sa has not yet been paired with the sensor controller 16, this downlink signal is composed of an unmodulated burst signal of predetermined time length. Hereinafter, this burst signal is referred to as a "position signal". On the other hand, when the stylus Sa is paired with the sensor controller 16, the downlink signal is configured to include a position signal having a shorter time length and a data signal. The data signal is a signal modulated by the data indicated by the command contained in the uplink signal. Examples of data transmitted by a data signal include a pen pressure value indicating the pressure applied to the tip of the stylus Sa, switch information indicating the on / off state of a button provided on the stylus Sa, and a pen ID stored in advance in the stylus Sa. And so on. The above-mentioned pen pressure value P corresponds to this pen pressure value, and the switch information SW1 and SW2 correspond to this switch information.

If the sensor controller 16 has not yet been paired with the stylus Sa, after transmitting the uplink signal, the sensor controller 16 scans all of the plurality of linear electrodes 15x and 15y so that the stylus Sa is formed on the entire touch surface 10a. Attempts to detect the transmitted downlink signal (global scan). When the downlink signal is detected by this detection process, the sensor controller 16 detects the position of the stylus Sa based on the reception intensity of the downlink signal at each of the plurality of linear electrodes 15x and 15y, and also detects the position of the stylus Sa with the stylus Sa. Perform a predetermined pairing operation between them. When this operation is completed, the sensor controller 16 and the stylus Sa are in a paired state.

After transmitting the uplink signal, the sensor controller 16 paired with the stylus Sa scans only a predetermined number of the plurality of linear electrodes 15x and 15y near the position of the last detected stylus Sa. (Local scan) attempts to detect the position signal transmitted by the stylus Sa on only a part of the touch surface 10a. Then, the position of the stylus Sa is newly acquired based on the reception intensity of the downlink signal at each of the linear electrodes 15x and 15y. Subsequently, the sensor controller 16 receives the data signal transmitted by the stylus Sa by scanning only one of the plurality of linear electrodes 15x and 15y near the position of the last detected stylus Sa. Then, by demodulating the received data signal, the data transmitted by the stylus Sa is acquired.

The sensor controller 16 also performs a process of determining the state of the stylus Sa based on the pen pressure value included in the received data signal. Specifically, when the received pen pressure value is 0, the sensor controller 16 determines that the stylus Sa is in the hover state (the pen tip is separated from the sheet-shaped recording medium). On the other hand, when the received pen pressure value is larger than 0, the sensor controller 16 determines that the stylus Sa is in a touch state (a state in which the pen tip is in contact with the touch surface 10a). The state of the stylus Sa thus determined is used to determine the reading timing of the conductive mark M composed of the conductor.

Next, the generation of the heat map will be described. The heat map is generated by the sensor controller 16 by the same principle as the finger detection by the general capacitance method. Hereinafter, a detailed description will be given with reference to FIG. 7.

FIG. 7 is a diagram showing the principle of heat map generation by the sensor controller 16. For the sake of simplicity, only four linear electrodes 15x are shown in the figure, but in reality, more linear electrodes 15x are arranged. Hereinafter, the description will be continued assuming that the number of the linear electrodes 15x is K.

First, the sensor controller 16 supplies the illustrated detection signal FDS to each linear electrode 15x. The detection signal FDS is, for example, a signal composed of _{K signals s 1} to s K each consisting of K pulses represented by "1" or "-1". Pulse of the signal _s 1 ~ _{s K} each n-th (n = 1 ~ K) constitute a pulse group _{p n,} each pulse constituting one pulse group _{p n} are input in parallel to the linear electrodes 15x To.

When the number of linear electrodes 15x is 4, the signals s ₁ to s _K are composed of four pulses represented by "1" or "-1", respectively. Specifically, as shown in FIG. 7, the signal s ₁ is "1,1,1,1", the signal s ₂ is "1,1, -1, -1", and the signal s ₃ is "1,-". 1, -1, 1 "and the signal s ₄ are composed of" 1-1, 1, -1 ", respectively.

The sensor controller 16 is functionally configured to include a shift register 16a and a correlator 16b. The shift register 16a is a FIFO format storage unit, and is configured to be able to store the same number (that is, K) of data as the number of linear electrodes 15x. When new data is stored in the shift register 16a, the data stored K times before is erased. Sensor controller 16 is in a state of selecting one linear electrode 15y, sequentially inputted to the linear electrodes 15x pulse group _p 1 ~ _{p 4,} repeated for each linear electrode 15y operation called. As a result, four levels L ₁ to L _{4 corresponding to the pulse groups p 1} to p ₄ appear sequentially on the selected linear electrode 15y, respectively. _{The sensor controller 16 sequentially acquires the levels L 1} to L ₄ appearing on the linear electrode 15y, and stores them in the shift register 16a each time.

The specific contents of the levels L ₁ to L ₄ will be described in detail by taking the case where the _{linear electrode 15y 1 shown in FIG. 7 is selected as an example.} In the following description, a capacitance formed between each of the linear electrodes 15y ₁ and four linear electrodes _15x 1 ~ 15x _4, and _C 11 _{~ C 41,} respectively.

First, the _{level L 1} stored in the shift register 16a corresponding to the _{pulse group p 1} is a capacitance vector (C ₁₁ , C ₂₁ , C ₃₁ , C ₄₁ ) and a vector indicating the pulse group p ₁ (1, 1). , 1, 1). This inner product is _{calculated as C 11} + C ₂₁ + C ₃₁ + C ₄₁ , as also shown in FIG. _{Similarly, the level L 2} stored in the shift register 16a corresponding to the pulse group p ₂ is a capacitance vector (C ₁₁ , C ₂₁ , C ₃₁ , C ₄₁ ) and a vector indicating the pulse group p _{1 (1).} , 1, -1, become inner product of -1) is calculated as _{C 11 + C 21 -C 31 -C} 41, level _{L 3} stored in the shift register 16a in response to the pulse group _{p 3} is the capacitance _{C 11-} C _21- C ₃₁ + C, which is the inner product of the vector (C ₁₁ , C ₂₁ , C ₃₁ , C ₄₁ ) and the vector (1, -1, -1, 1) indicating the _{pulse group p 3. The level L 4} calculated as 41 and stored in the shift register 16a corresponding to the pulse group p ₄ is a capacitance vector (C ₁₁ , C ₂₁ , C ₃₁ , C ₄₁ ) and a vector indicating the pulse group p _4. It is calculated as _{C 11-} C ₂₁ + C _31- C _{41 as} the inner product with (1, -1, 1, -1).

The sensor controller 16 sequentially calculates the correlation values T ₁ to T _{4 with the levels L 1} to L ₄ stored in the shift register 16a for each of the _{four pulse groups p 1} to p 4 using the correlator 16 b. .. As shown in FIG. 7, the specific contents of the _{correlation values T 1} to T ₄ calculated in this way _{are 4C 11} , 4C ₂₁ , 4C ₃₁ , and 4C ₄₁ , respectively. That is, the correlation value _T 1 ~ _{T 4,} respectively linear electrodes _15x 1 ~ 15x _4, so that the change in the capacitance formed at the intersection of the linear electrode 15y ₁ is reflected.

The sensor controller 16 calculates the _{correlation values T 1} to T _{4 for each linear electrode 15y.} Then, the above-mentioned heat map is generated by mapping the calculated result on a plane. This completes the heat map generation.

The stylus Sa detection and heat map generation performed by the sensor controller 16 have been described in detail above. Next, the entire flow of the processing of the sensor controller 16 including the processing of detecting the page information of the page being written based on the generated heat map will be described in detail with reference to the flow chart of the processing performed by the sensor controller 16. explain.

FIG. 8 is a flow chart of processing performed by the sensor controller 16. The figure shows the processing after the power button 11 shown in FIG. 1 is pressed with the notepad P1 mounted on the touch surface 10a and the power of the position detecting device 10 is turned on. ..

When the power of the position detection device 10 is turned on, in this example, the sensor controller 16 first generates a heat map (step S1). The specific method of this generation is as described above. Subsequently, the sensor controller 16 detects the page information of the page being written by the user based on the generated heat map (step S2). The specific method of this detection is also as described above. In step S2, the sensor controller 16 also performs a process of temporarily storing information indicating the detected page in the memory 17. Further, the sensor controller 16 generates a file for writing handwritten data and performs a process of writing to the memory 17 (step S3).

Next, the sensor controller 16 transmits an uplink signal (step S4). Then, it is determined whether or not it has been paired with the stylus Sa (step S5), a global scan is performed if paired (step S6), and a local scan (step S8) and a data signal are not paired. (Step S9) is executed respectively.

The sensor controller 16 that executed step S6 writes the coordinate data indicating the detected position in the file generated in step S3 (step S7). In this case, the information other than the coordinate data and the time stamp information is null. On the other hand, the sensor controller 16 that has executed steps S8 and S9 writes the detected position and the received data to the file generated in step S3 (step S10), and the stylus Sa state (hover) based on the received pen pressure value. A state (state or touch state) is determined (step S11; determination step).

The sensor controller 16 that has completed step S7 or step S11 next determines whether or not the hover state or the state without pairing has continued for a predetermined time (step S12). The sensor controller 16 that has obtained a negative determination result returns to step S4 and continues the process. On the other hand, the sensor controller 16 that has obtained a positive determination result generates a heat map by detecting the position of the conductor in the touch surface 10a (step S13. Position detection step), and based on the generated heat map. , Detects the page information of the page being written by the user (step S14). The details of the processes of steps S13 and S14 are the same as the processes of steps S1 and S2 described above. Then, the sensor controller 16 compares the page detected in step S14 with the page indicated by the information temporarily stored in the memory 17 in step S2 or the previous step S14, so that the page being written is displayed. It is determined whether or not the change has been made (step S15).

The sensor controller 16 determined to have not changed in step S15 returns to step S4 and continues processing. On the other hand, the sensor controller 16 determined to have changed in step S15 newly generates a file for writing handwritten data and writes it in the memory 17 (step S16). From this point onward, the new file thus generated will be the target of writing in steps S7 and S10.

As described above, according to the position detection device 10 according to the present embodiment, the sensor controller 16 reads the identification information of each page through the capacitive interaction with the conductive mark M, and writes based on the result. Since the page information of the page inside is detected, an optical or magnetic detection means or a sensor that reads a code such as a two-dimensional code is used without providing a protruding portion for page detection on the touch surface 10a. It is possible to detect the page information of the page being written without any user operation. Moreover, the sensor 15 for detecting handwritten information can be shared so that the conductive mark M can be detected.

Further, according to the position detection device 10 according to the present embodiment, the sensor controller 16 executes the write page detection process when the stylus Sa is in the hover state or when there is no paired stylus Sa. Therefore, it becomes possible to appropriately perform the page detection process at the timing when the user may be turning the page.

According to the position detection device 10 according to the present embodiment, it is possible not only to change the page being written, but also to specify the page number of the page being written. Therefore, the sensor controller 16 may add the specified page number to the file stored in the memory 17 as metadata. By doing so, in the application of the tablet terminal 30, it becomes possible to perform the processing according to the page number of the notepad P1.

Next, the position detection device 10 according to the second embodiment of the present invention will be described. FIG. 9 is a diagram showing the internal configuration of the position detecting device 10 and the tablet terminal 30 according to the second embodiment of the present invention. As shown in the figure, the position detection device 10 according to the present embodiment includes a sensor controller 16, a memory 17, a wireless communication unit 18, sensors 20 and 21, and a reading unit 22. The configuration of the tablet terminal 30 is the same as that according to the first embodiment.

As can be understood by comparing FIG. 9 with FIG. 4, the position detection device 10 according to the present embodiment has sensors 20 and 21 instead of the sensor 15, and further, a reading unit 22 is provided separately from the sensor controller 16. It differs from the position detection device 10 according to the first embodiment in that it has. Further, in the present embodiment, the stylus Sb corresponding to the electromagnetic induction method (EMR) is used instead of the stylus Sa corresponding to the active electrostatic method. Since the other points are the same as those of the position detecting device 10 according to the first embodiment, the differences from the position detecting device 10 according to the first embodiment will be described below.

The sensor 20 is an electromagnetic induction type sensor corresponding to the detection of the stylus Sb. Further, the sensor 21 is a projection type capacitance type sensor (PCAP) corresponding to the position detection of the conductor by the capacitance type. The sensor 20 is used to detect the stylus Sb, and the sensor 21 is used to read the identification information of each page.

FIG. 10 is a diagram showing a detailed configuration of the sensors 20 and 21 and the stylus Sb. As shown in FIG. 10, the sensors 20 and 21 are juxtaposed along the X direction. Further, the sensor 21 is arranged on the left side of the sensor 20 when viewed from the user. This makes it possible to use a sheet-shaped recording medium having a structure in which the conductive mark M is formed along one side on the left side when viewed from the user, as in the notepad P1 shown in FIG. Further, the stylus Sb is configured to have an LC resonance circuit including a capacitor 50 and an inductor 51.

Focusing on the stylus Sb first, the inductor 51 plays a role of generating an induced voltage according to the magnetic field supplied from the sensor 20 and charging the capacitor 50. After the supply of the magnetic field from the sensor 20 is stopped, the inductor 51 returns a signal to the sensor 20 by using the voltage stored in the capacitor 50. This return signal includes a continuous signal for position detection, a start signal indicating the end of the continuous signal, and side switch information in this order.

The capacity of the capacitor 50 is configured to change depending on the pressure (= pen pressure value) applied to the pen tip of the stylus Sb. Since the resonance frequency of the resonance circuit changes when the capacitance of the capacitor 50 changes, the frequency of the return signal transmitted as described above also changes depending on the pen pressure value. The sensor controller 16 according to the present embodiment acquires the pen pressure value from the stylus Sb by detecting this frequency change.

Next, focusing on the sensors 20 and 21, the specific configuration of the sensor 21 is the same as that of the sensor 15 described in the first embodiment except that the width in the X direction is narrowed. The reading unit 22 generates a heat map by the same processing as that of the sensor controller 16 described in the first embodiment, and writes it in a predetermined area in the memory 17.

On the other hand, since the sensor 20 is an electromagnetic induction method, it has a different configuration from the sensor 15 which is a capacitance type. Hereinafter, the configuration of the sensor 20 and the detection of the stylus Sb performed by the sensor controller 16 using the sensor 20 will be described in detail with reference to FIG.

As shown in FIG. 10, the sensor 20 has a configuration in which a plurality of loop coils LC are arranged in a rectangular plane region. The plurality of loop coil LCs include a plurality of loop coil LCs extending in the Y direction and a plurality of loop coil LCs extending in the X direction. One end of each loop coil LC is grounded and the other end is connected to the sensor controller 16.

The sensor controller 16 selects one of the plurality of loop coil LCs one by one in order, and supplies a current signal to the selected loop coil LC. Then, a magnetic field is generated around the loop coil LC, and an induced voltage is generated in the inductor 51 in the stylus Sb in the magnetic field. The sensor controller 16 stops the supply of the current signal after a predetermined time has elapsed from the start of the supply of the current signal. Then, the magnetic field generated around the loop coil LC disappears, and the transmission of the above-mentioned return signal is started from the stylus Sb. The sensor controller 16 detects the position of the stylus Sb based on the reception intensity of the return signal transmitted in each loop coil LC, and decodes the return signal to obtain the data (pen pressure value) transmitted by the stylus Sb. Includes).

FIG. 11 is a flow chart of processing performed by the sensor controller 16 according to the present embodiment. The figure also shows the processing after the power button 11 shown in FIG. 1 is pressed with the notepad P1 mounted on the touch surface 10a and the power of the position detecting device 10 is turned on. ..

When the power of the position detecting device 10 is turned on, the reading unit 22 first generates a heat map (step S20). As described above, the reading unit 22 stores the generated heat map in a predetermined area of the memory 17. After that, the reading unit 22 continues to update the information in the predetermined area of the memory 17 by periodically generating the heat map.

The sensor controller 16 acquires a heat map from a predetermined area of the memory 17 (step S21). Then, based on the acquired heat map, the page information of the page being written is detected (step S22), and a file for writing the handwritten data is generated (step S23). The details of the processes of steps S22 and S23 are the same as the processes of steps S2 and S3 shown in FIG.

Next, the sensor controller 16 detects the position of the stylus Sb (step S24). The details of this position detection are as described above, and as a result, the coordinate data indicating the position of the stylus Sb and the data transmitted by the stylus Sb (including the pen pressure value) are acquired. The sensor controller 16 writes the position detected in this way and the acquired data in the file generated in step S23 (step S25).

Subsequently, the sensor controller 16 acquires the heat map again from the predetermined area of the memory 17 (step S26). Then, the page information of the page being written is detected based on the acquired heat map (step S27). The details of the processes of steps S26 and S27 are the same as the processes of steps S21 and S22 described above. After that, the sensor controller 16 compares the page information detected in step S27 with the page information indicated by the information temporarily stored in the memory 17 in step S22 or the previous step S27 during writing. It is determined whether or not a certain page has been changed (step S28).

The sensor controller 16 determined to have not changed in step S28 returns to step S24 and continues processing. On the other hand, the sensor controller 16 determined to have changed in step S28 newly generates a file for writing handwritten data and writes it in the memory 17 (step S29). From then on, the new file thus generated will be the target of writing in step S25.

As described above, according to the position detection device 10 according to the present embodiment, the reading unit 22 reads the identification information of each page through the electrical interaction with the conductive mark M, and the sensor controller is based on the result. Since 16 detects the page information of the page being written, the code such as an optical or magnetic detection means or a two-dimensional code is read without providing a protruding portion for page detection on the touch surface 10a. It is possible to detect the page information of the page being written without using a sensor and without user operation.

Further, according to the position detection device 10 according to the present embodiment, since the sensor 21 used for generating the heat map is provided separately from the sensor 20 for reading the stylus Sb, an electromagnetic induction method is used for detecting the stylus Sb. (EMR) can be adopted, and the position of the stylus Sb can be continuously detected even when the stylus Sb is in the hover state.

Further, according to the position detection device 10 according to the present embodiment, since the role of the sensor 21 is limited to the generation of the heat map, it becomes possible to use the sensor 21 optimized for the generation of the heat map. Specifically, the sampling frequency of the detection signal FDS is higher than that of a normal sensor, and therefore a sensor with good sensitivity can be used. Further, in order to reduce the influence of the parasitic capacitance, the detection signal FDS is supplied to the linear electrode 15x and received by the linear electrode 15y, and the detection signal FDS is supplied to the linear electrode 15y to be linear. It becomes possible to generate a heat map while switching between the operation received by the electrode 15x.

As with the position detection device 10 according to the first embodiment, the position detection device 10 according to the present embodiment not only changes the page being written, but also the page number of the page being written. Can be identified. Therefore, the sensor controller 16 may add the specified page number to the file stored in the memory 17 as metadata. By doing so, in the application of the tablet terminal 30, it becomes possible to perform the processing according to the page number of the notepad P1.

Next, the position detection device 10 according to the third embodiment of the present invention will be described. FIG. 12 is a diagram showing the internal configuration of the position detecting device 10 and the tablet terminal 30 according to the third embodiment of the present invention. As shown in the figure, the position detection device 10 according to the present embodiment includes a sensor controller 16, a memory 17, a wireless communication unit 18, a sensor 20, and an IC tag reader 23. The configuration of the tablet terminal 30 is the same as that according to the first and second embodiments.

As will be understood by comparing FIG. 12 with FIG. 9, the position detecting device 10 according to the present embodiment does not have the sensor 21 and the reading unit 22, but has the IC tag reader 23, that is, the second embodiment. It is different from the position detection device 10 according to the above. Further, in the present embodiment, instead of the conductor (conductive mark M), the information written in the IC tag R is used as the identification information of each page. Since the other points are the same as those of the position detecting device 10 according to the second embodiment, the differences from the position detecting device 10 according to the second embodiment will be described below.

First, FIG. 13 is a diagram showing a sheet-shaped recording medium P2 according to the present embodiment and a method of writing identification information on the sheet-shaped recording medium P2. The sheet-shaped recording medium P2 according to the present embodiment is a set of unbound single sheets of paper, and is typically printer paper. An IC tag R is embedded in each page of the sheet-shaped recording medium P2 in advance.

FIG. 13 shows an example in which a teacher prepares an answer sheet for a test in a junior high school or the like. The teacher according to this example creates an educational material (answer sheet) according to the present embodiment by creating a manuscript using a computer 70 such as a personal computer and printing it using a printer 60. The printer 60 has an IC tag writer 62 that writes to the IC tag R in the vicinity of the paper ejection port 61 from which the printed paper is discharged, and at the same time as printing, the identification information is printed on the IC tag R of each page. Is configured to write. Hereinafter, the creation of the answer sheet will be described in more detail with reference to the functional blocks of the printer 60.

FIG. 14 is a schematic block diagram showing a functional block of the printer 60. As shown in the figure, the printer 60 includes a control unit 63 and a reception unit 64 in addition to the IC tag writer 62 also shown in FIG.

The IC tag writer 62 is configured to have a function of writing identification information to the IC tag R. The receiving unit 64 is connected to the computer 70 by wire or wirelessly, and has a function of transmitting and receiving various signals to and from the computer 70. The signal transmitted from the computer 70 to the receiving unit 64 includes a print signal indicating the content of printing and identification information for writing to the IC tag R, and the receiving unit 64 transmits the received print signal and the identification information. It is configured to output to the control unit 63.

The control unit 63 is a central processing unit of the printer 60, prints on paper in response to a print signal supplied from the receiver 64, and causes an IC tag writer 62 for the IC tag R embedded in the paper. It serves to write the identification information supplied from the receiving unit 64.

On the computer 70, the teacher who intends to create the answer sheet creates the manuscript of the answer sheet including the name column and the answer column using the document creation software, and also uses the spreadsheet software to create the student name and the IC tag R. Create a correspondence table that associates with the identification information of each page to be written in. Then, for example, using the mail merge function of the document creation software, a print signal including the corresponding student name in the manuscript is generated for each record of the correspondence table, and is output to the printer 60 together with the corresponding identification information. Upon receiving this, the printer 60 prints and writes to the IC tag R as described above to generate an answer sheet having a plurality of pages in which different identification information is written.

Returning to FIG. 12, the configuration of the position detection device 10 according to the present embodiment will be described in detail. First, the sensor 20 is an electromagnetic induction type sensor corresponding to the detection of the stylus Sb, as described in the second embodiment. However, since the sensor 21 is not provided, the sensor 20 according to the present embodiment is provided over the entire touch surface 10a. Therefore, the user can write on the sheet-shaped recording medium with the entire touch surface 10a. In addition, instead of the sensor 20, the capacitance type sensor 15 described in the first embodiment may be used.

The IC tag reader 23 reads the identification information of each page through an electrical interaction with the IC tag R, and writes the result in a predetermined area in the memory 17. This reading is performed periodically in the same manner as the reading by the reading unit 22 described in the second embodiment.

FIG. 15 is a flow chart of processing performed by the sensor controller 16 according to the present embodiment. The figure also shows the processing after the power button 11 shown in FIG. 1 is pressed with the notepad P1 mounted on the touch surface 10a and the power of the position detecting device 10 is turned on. ..

When the power of the position detection device 10 is turned on, the IC tag reader 23 first reads the identification information from the IC tag R (step S30). As described above, the IC tag reader 23 stores the read identification information in a predetermined area of the memory 17. After that, the IC tag reader 23 periodically reads the identification information from the IC tag R to continuously update the information in the predetermined area of the memory 17.

The sensor controller 16 acquires identification information from a predetermined area of the memory 17 (step S31). Then, the page information of the page being written is detected based on the acquired identification information (step S32), and a file for writing the handwritten data is generated (step S33). In step S32, the sensor controller 16 also performs a process of temporarily storing information indicating the detected page in the memory 17.

Subsequently, the sensor controller 16 detects the position of the stylus Sb (step S34). The detected position and the acquired data are written in the file generated in step S33 (step S35). The details of the processes of steps S34 and S35 are the same as the processes of steps S24 and S25 shown in FIG.

Next, the sensor controller 16 acquires the identification information again from the predetermined area of the memory 17 (step S36). Then, the page information of the page being written is detected based on the acquired identification information (step S37). The details of the processes of steps S36 and S37 are the same as the processes of steps S31 and S32 described above. After that, the sensor controller 16 compares the page detected in step S37 with the page indicated by the information temporarily stored in the memory 17 in step S32 or the previous step S37, so that the page being written is being written. Is determined (step S38).

The sensor controller 16 determined to have not changed in step S38 returns to step S34 and continues processing. On the other hand, the sensor controller 16 determined to have changed in step S38 newly generates a file for writing handwritten data and writes it in the memory 17 (step S39). From then on, the new file thus generated will be the target of writing in step S35.

As described above, according to the position detection device 10 according to the present embodiment, the IC tag reader 23 reads the identification information of each page through the electrical interaction with the IC tag R, and the sensor controller 16 is based on the result. Detects the page information of the page being written, so that a sensor that reads a code such as an optical or magnetic detection means or a two-dimensional code without providing a protruding portion for page detection on the touch surface 10a. It is possible to detect the page information of the page being written without using and without user operation.

Further, according to the position detection device 10 according to the present embodiment, since the IC tag reader 23 for reading the identification information is a device different from the sensor controller 16, the stylus Sb is similar to the second embodiment. It becomes possible to adopt an electromagnetic induction method (EMR) for the detection of the stylus, and it becomes possible to continuously detect the position of the stylus Sb even when the stylus Sb is in the hover state.

Further, according to the printer 60 according to the present embodiment, since the user can write the identification information in the IC tag R of each page, the present invention is also applied to a sheet-shaped recording medium which is not bound such as a test answer sheet. It will be possible to do. Therefore, for example, when a teacher collects answer sheets from a plurality of students, puts them together on the touch surface 10a, and grades them while turning over one sheet at a time, handwritten data indicating the contents entered by the teacher on each answer sheet is displayed. , It becomes possible to put together one file for each answer sheet and store it in the memory 35.

The sensor controller 16 according to the present embodiment may add the acquired identification information to the file stored in the memory 17 as metadata. Further, the tablet terminal 30 acquires the above-mentioned correspondence table (a table in which the student name is associated with the identification information of each page written in the IC tag R) from the computer 70, and the identification information added to the file is the student name. It may be converted to. By doing so, the teacher can confirm the handwritten data entered in the answer sheet by associating with the name of the student who created the answer sheet in the application of the tablet terminal 30.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and the present invention can be implemented in various embodiments without departing from the gist thereof. Of course.

For example, in each of the above embodiments, the sensor controller 16 in the position detection device 10 detects the page information of the page being written and performs a process of dividing the file. However, in the position detection device 10, the position detection device 10 is used. It may be possible to perform only a part of these processes and perform the remaining processes on the tablet terminal 30. As a specific example, the sensor controller 16 may transmit information indicating the page being written to the tablet terminal 30, and the tablet terminal 30 may divide the file based on the received information.

Further, in the first and second embodiments, an example in which the notepad P1 having the binding margin at the top is used as an example of the sheet-shaped recording medium has been described, but the present invention has a spread format like a magazine, that is, It is also applicable to a sheet-shaped recording medium in which each page is composed of a right page portion and a left page portion. In this case, the conductive mark M may be placed on either the right page portion or the left page portion.

10 Position detection device 10a Touch surface 11 Power button 12 Power lamp 13 Recording medium fixing part 14 Stylus holding part 15, 21 Projection type capacitance type sensor 15x, 15y Linear electrode 16 Sensor controller 16a Shift register 16b Correlator 17 Memory 18 Wireless communication unit 20 Electromagnetic induction type sensor 22 Reading unit 23 IC tag reader 30 Tablet terminal 31 Touch screen 32 Wireless communication unit 33 Stroke builder 34 Editor 35 Memory 50 Capacitor 51 Inductor 60 Printer 61 Paper ejection port 62 IC tag writer 63 Control unit 64 Receiver 70 Computer FDS Detection signal LC Loop coil M Conductive mark P Writing pressure value P1 Notepad P2 Sheet-shaped recording medium R IC tag Sa Active electrostatic stylus Sb Electromagnetic induction stylus SW1, SW2 Switch information

Claims (13)

1. A mounting surface on which a sheet-shaped recording medium configured so that a plurality of pages are superimposed on each other is provided, and the sheet-shaped recording medium mounted on the above-mentioned mounting surface can be visually handwritten. A position detection device that detects a position indicated by the stylus in response to a handwriting operation on the sheet-shaped recording medium placed on the above-mentioned mounting surface by the stylus.
   A sensor that senses a page identification member for identifying each page constituting the plurality of pages arranged on the sheet-shaped recording medium placed on the above-mentioned mounting surface, and a sensor.
   It has a control circuit connected to the sensor.
   The page identification member is composed of a conductor, and the sensor is configured to detect the conductor by a capacitance method.
   The control circuit is configured to be able to identify the target page of the handwriting operation by the stylus in response to the detection of the conductor arranged on the sheet-shaped recording medium by the sensor.
   A position detection device characterized by this.
2. The sensor detects the conductor placed on the sheet-shaped recording medium and also detects the position corresponding to the handwriting operation on the sheet-shaped recording medium placed on the previously described mounting surface by the stylus. Is configured in,
   The position detection device according to claim 1.
3. A sensor having a detection method different from that of the sensor for detecting the conductor arranged on the sheet-shaped recording medium corresponds to a handwriting operation on the sheet-shaped recording medium placed on the above-mentioned mounting surface by the stylus. It is configured to detect the position,
   The position detection device according to claim 1.
4. The sensor for detecting a position corresponding to a handwriting operation on the sheet-shaped recording medium placed on the above-mentioned mounting surface by the stylus is configured to detect the position by an electromagnetic induction method.
   The position detection device according to claim 3.
5. The position detecting device is configured to be able to detect that the stylus is in a state of being separated from the sheet-shaped recording medium placed on the above-mentioned mounting surface.
   The control circuit corresponds to the detection of the conductor arranged on the sheet-shaped recording medium by the sensor in a state where the stylus is separated from the sheet-shaped recording medium placed on the above-mentioned mounting surface. It is configured so that the target page of the handwriting operation by the stylus can be identified.
   The position detection device according to any one of claims 1 to 4.
6. The stylus is configured to be able to detect the pen pressure, and the position detecting device is configured to be able to acquire the pen pressure.
   The control circuit is configured to detect that the stylus is separated from the sheet-shaped recording medium placed on the above-mentioned mounting surface based on the detected pen pressure.
   The position detection device according to claim 5.
7. The control circuit is configured to identify the target page of the handwriting operation by the stylus corresponding to the state in which the stylus is separated from the sheet-shaped recording medium placed on the above-mentioned mounting surface for a predetermined time. Has been,
   The position detection device according to claim 5.
8. A stylus that can be visually handwritten on the sheet-shaped recording medium mounted on the mounting surface on which the sheet-shaped recording medium configured so that a plurality of pages are superimposed on each other is placed on the previously described mounting surface. It is a page detection method for detecting a page corresponding to a handwriting operation on the placed sheet-shaped recording medium.
   The plurality of pages arranged on the sheet-shaped recording medium mounted on the previously described mounting surface corresponding to the stylus being separated from the sheet-shaped recording medium mounted on the previously described mounting surface. A page identification member composed of a conductor for identifying each page constituting the stylus is sensed by the capacitance method.
   It is configured so that the target page of the handwriting operation by the stylus can be identified in response to the detection of the conductor arranged on the sheet-shaped recording medium by the sensor.
   A page detection method characterized by that.
9. A sheet-like recording medium configured so that multiple pages are superimposed on each other.
   It is used together with a page turning state detection device equipped with a mounting surface on which the sheet-shaped recording medium is placed and an electrostatic sensor for recognizing each page of the sheet-shaped recording medium.
   A page identification member for identifying each page constituting the plurality of pages is arranged, and the page identification member is composed of a conductor, so that the conductor by the electrostatic sensor is used. It is configured to be able to recognize the page corresponding to the page turning of the sheet-like recording medium configured so that a plurality of pages are superimposed on each other based on the detection state of.
   A sheet-like recording medium characterized by this.
10. The sheet-shaped recording medium according to claim 9, wherein each page is composed of a right page portion and a left page portion.
11. At least one of the conductors arranged in each of the first page constituting the plurality of pages and the second page different from the first page is the first page and the second page. Pages are placed in the same position when they are superimposed on each other.
    The sheet-shaped recording medium according to claim 9.
12. In the conductors arranged in the first page constituting the plurality of pages and the second page different from the first page, the first page and the second page are mutually arranged. They are placed in different positions from each other in the superimposed state.
    The sheet-shaped recording medium according to claim 9.
13. The conductor is arranged at a predetermined position on each of the plurality of pages by a printing method.
    The sheet-shaped recording medium according to claim 9.

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