JP2016207067A - Information input device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information input device and program with which it is possible to estimate ink consumption with high accuracy.SOLUTION: The CPU of an information input device acquires the position of a writing instrument on a fixed cycle (S13). On the basis of a first position being the position of the writing instrument which is acquired by the S13 process and a second position being the position of the writing instrument which is acquired by the S13 process a prescribed time after the first position is acquired, the CPU calculates a writing distance that is a distance for which a line drawing is written from the first position to the second position by the writing instrument (S14). On the basis of the writing distance calculated by the S14 process and a reference consumption predetermined as the amount of ink consumed when a line drawing of prescribed distance is written in a prescribed time by the writing instrument, ink consumption that is the amount of ink consumed in writing a line drawing from the first position to the second position is calculated (S15).SELECTED DRAWING: Figure 6

Description

  The present invention relates to an information input device and a program that can acquire information written by a user by digitizing a movement locus of a writing instrument.

  There is known an information input device capable of acquiring information such as written characters and figures by digitizing the movement trajectory of a writing instrument when writing on a recording medium such as a notebook with a dedicated writing instrument. For example, the coordinate reading device described in Patent Document 1 can digitize the movement trajectory of a pen when writing with a pen as a dedicated writing instrument. Furthermore, the coordinate reading apparatus can estimate the ink remaining amount based on the ink consumption of the pen. The pen includes a switch that is turned on when writing on the recording medium. The coordinate reading device calculates the ink consumption amount by counting the time that the switch is turned on (that is, the time during which writing is performed). When the counted value reaches the reference value, the user is notified of a decrease in the remaining amount of ink.

JP 2001-56734 A

  By the way, when a user writes on a recording medium with a writing instrument, the user may write quickly or slowly. For example, when a user quickly writes on a recording medium with a water-based ink pen, the ink does not soak into the recording medium. On the other hand, when the user slowly writes on the recording medium with a water-based ink pen, the ink oozes more on the recording medium. That is, even if the writing time is the same, the ink consumption may differ due to the difference in writing distance. In this case, since the coordinate reading apparatus estimates the ink consumption by counting the written time, there is a possibility that the ink consumption cannot be estimated accurately.

  An object of the present invention is to provide an information input device and program capable of accurately estimating ink consumption.

  An information input device according to a first aspect of the present invention is a first detecting unit capable of detecting a position of a writing instrument capable of writing a line drawing on a recording medium using ink, and a first position for acquiring the position of the writing instrument detected by the detecting unit. An acquisition unit, a first position that is the position of the writing instrument acquired by the first acquisition unit, and the writing instrument acquired by the first acquisition unit after a predetermined time has elapsed since the first position was acquired. Based on the second position, which is a position, a first calculation means for calculating a writing distance, which is a distance at which a line drawing was written from the first position to the second position by the writing instrument, and the first calculation means. Further, based on the writing distance and a reference consumption amount predetermined as the amount of the ink consumed when the line drawing of the predetermined distance is written by the writing instrument at the predetermined time, Serial and a second calculating means for calculating the ink consumption is the amount of the ink consumed for writing a line drawing from a first position to the second position.

  According to the first aspect, the information input device acquires the second position after a predetermined time has elapsed after acquiring the first position. The reference consumption amount is a reference amount that is predetermined as the amount of ink that is consumed when a line drawing of a predetermined distance is written in a predetermined time by a writing instrument. The information input device calculates the ink consumption amount of the writing instrument in which the line drawing is written from the first position to the second position based on the writing distance and the reference consumption amount at a predetermined time. Therefore, the information input device can estimate the ink consumption with high accuracy.

  The information input device according to the first aspect of the present invention includes second acquisition means for acquiring individual information capable of specifying the writing instrument, and the second calculation means is the individual information acquired by the second acquisition means. The ink consumption may be calculated in correspondence with the above. In this case, the information input device can estimate the ink consumption for each writing instrument.

  The information input device according to the first aspect of the present invention performs notification regarding the remaining amount of ink that is the amount of the ink currently mounted on the writing instrument based on the ink consumption calculated by the second calculation unit. You may provide an alerting | reporting means. In this case, the information input device can notify the user of the ink remaining amount of the writing instrument.

  The information input device according to the first aspect of the present invention includes a determination unit that determines whether a predetermined condition is satisfied based on the ink consumption calculated by the second calculation unit, and the notification unit includes the determination unit. When it is determined that the predetermined condition is satisfied, notification regarding the remaining amount of ink may be performed. In this case, the information input device can notify the user that the predetermined condition is satisfied based on the ink consumption of the writing instrument.

  The information input device according to the first aspect of the present invention may include a light emitting unit capable of emitting light, and the notification unit may perform notification regarding the ink remaining amount by causing the light emitting unit to emit light. In this case, the information input device can notify the user of the ink remaining amount by causing the light emitting unit to emit light.

  The information input device according to the first aspect of the present invention includes communication means capable of communicating with an external electronic device, and the notification means sends the ink remaining amount to the external electronic device via the communication means. An instruction to execute the notification regarding may be transmitted. In this case, the information input device can notify the user of the ink remaining amount with an external electronic device.

  In the information input device according to the first aspect of the present invention, the instruction may be an instruction to display a predetermined image on the external electronic device. In this case, the information input device can notify the user of the remaining ink amount by displaying a warning on an external electronic device.

  The information input device according to the first aspect of the present invention is data corresponding to the line drawing written on the recording medium by the writing tool based on the position of the writing tool acquired by the first acquisition means, and Generating means for generating line drawing data displayed in a first color; and transmitting means for transmitting the line drawing data generated by the generating means to the external electronic device via the communication means, May be an instruction to display the line drawing data transmitted by the transmitting unit in a second color different from the first color instead of the first color. In this case, the information input device can notify the user of the ink remaining amount by causing the external electronic device to display the color of the line drawing data instead of the first color to the second color.

  The program according to the second aspect of the present invention provides a computer of an information input device provided with a detecting means capable of detecting the position of a writing tool capable of writing a line drawing on a recording medium with ink, the program of the writing tool detected by the detecting means. A first acquisition step of acquiring a position, a first position which is the position of the writing instrument acquired by the first acquisition step, and a first time after the first position is acquired by the first acquisition step. A first calculation step of calculating a writing distance, which is a distance at which a line drawing is written from the first position to the second position by the writing tool, based on the acquired second position that is the position of the writing tool; The writing distance calculated by one calculating step and the consumption when a line drawing of a predetermined distance is written in the predetermined time by the writing instrument. A second calculation step of calculating an ink consumption amount that is an amount of the ink consumed to write a line drawing from the first position to the second position based on a reference consumption amount determined in advance as an ink amount; And execute. When the program according to the second aspect is executed by the computer of the information input device, the same effects as in the first aspect can be achieved.

It is a figure which shows the outline | summary of the handwriting input system. 2 is a block diagram showing an electrical configuration of the handwriting input system 1. FIG. 2 is a front view of a sheet 111. FIG. It is a figure which shows an example of the image 300 displayed by the 1st color. It is a figure for demonstrating ink consumption. It is a flowchart of a main process. It is a figure which shows an example of the predetermined image. It is a figure which shows an example of the image 300 displayed by the 2nd color.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The outline of the handwriting input system 1 according to the present embodiment will be described with reference to FIG. In the following description, the upper left side, lower right side, upper side, lower side, upper right side, and lower left side of FIG. 1 are the left side, right side, front side, and rear side of the reading device 2, the paper medium 100, and the electronic pen 3, respectively. The upper side and the lower side are defined and described. Note that the electronic pen 3 of FIG. 1 is a cross-sectional view for explanation.

  As shown in FIG. 1, the handwriting input system 1 mainly includes a reading device 2, an electronic pen 3, a smartphone 19, and the like. The reading device 2 is a thin and light handwritten input device that can be folded and carried. In the handwriting input system 1, the user writes a line drawing on the paper 111 of the paper medium 100 attached to the reading device 2 using the electronic pen 3. The line drawing includes characters, numerical values, symbols, figures, and the like. The reading device 2 identifies a plurality of positions of the electronic pen 3 that changes over time in the writing process. The smartphone 19 acquires a plurality of positions specified by the reading device 2. The smartphone 19 specifies a line drawing written on the paper 111 with the electronic pen 3 based on the acquired plurality of positions. The smartphone 19 generates an image file of an image including at least the specified line drawing. The user of the smartphone 19 inputs an operation for selecting one of the generated plurality of image files via the touch panel 191. The smartphone 19 causes the display 192 to display an image corresponding to the selected image file. The user can visually recognize an image including a line drawing having the same shape as the line drawing written on the paper 111 with the electronic pen 3 via the display 192.

  The reading device 2 mainly includes a pair of left and right left reading devices 2L, a right reading device 2R, and a cover 4. The left reading device 2L and the right reading device 2R have a rectangular thin plate shape. The left reading device 2L and the right reading device 2R are arranged on the front surface of the cover 4 so as to be spread in the left-right direction. The left reading device 2L and the right reading device 2R are electrically connected by a flat cable (not shown). The right reading device 2R includes three LEDs 5 at the upper end. The LED 5 can notify the user of the state of the reading device 2 and the electronic pen 3 by emitting light. The cover 4 includes a bag-like bag portion 4A on the left side. The left reading device 2L is detachably attached to the cover 4 by being inserted into the bag portion 4A. The right reading device 2R is attached to the right front surface of the cover 4 with a double-sided tape and an adhesive resin film.

  A paper medium 100 is detachably mounted on the front surface of the reading device 2. The paper medium 100 is a booklet that can be spread in the left-right direction. In the paper medium 100, a pair of front covers (a front cover 110 </ b> L and a back cover 110 </ b> R) and a plurality of papers 111 are bound at a part of each edge. As an example, the paper medium 100 is an A5 size notebook. The format indicating the layout or the like of symbols preprinted on the paper 111 is different for each type of the paper medium 100. In the present embodiment, the format of the paper 111 is plain. The paper 111 includes a writing area 111A and a check box 111B. The check box 111B is provided in the lower right corner of the paper 111. The writing area 111 </ b> A is an area excluding the check box 111 </ b> B on the paper 111.

  The paper medium 100 is attached to the reading device 2 such that the front cover 110L is placed on the front surface of the left reading device 2L and the back cover 110R is placed on the front surface of the right reading device 2R. In the present embodiment, the paper medium 100 is mounted in a state where the paper medium 100 is positioned on the reading device 2 by a double-sided tape, an adhesive resin film, or the like. That is, the left reading device 2L and the right reading device 2R move integrally with the front cover 110L and the back cover 110R, respectively. The user can write a line drawing on the paper 111 of the paper medium 100 using the electronic pen 3. The line drawing is written on the paper 111 as the ink mounted on the electronic pen 3 oozes out on the paper 111. In the present embodiment, when the line drawing is written on the paper 111 with the electronic pen 3, the reading device 2 can calculate the ink consumption amount that is the amount of ink that oozes on the paper 111. A method for calculating ink consumption by the reading device 2 will be described later.

  The electronic pen 3 is a known electromagnetic induction electronic pen, and includes a cylindrical body 30, a core 37, a detection switch 33, a button-type battery 34, a coil 35, and a substrate 36. The electronic pen 3 is a sign pen, for example. The cylindrical body 30 has a cylindrical shape, and houses a part of the core 37, the detection switch 33, the battery 34, the coil 35, and the substrate 36 therein. The core 37 includes a pen tip 31 and an ink storage unit 32. The pen tip 31 protrudes from the rear end of the electronic pen 3 to the outside. The ink storage unit 32 stores ink. In the present embodiment, the ink storage unit 32 stores water-based ink. The ink stored in the ink storage unit 32 is supplied to the pen tip 31. For this reason, the user can write a line drawing on the paper 111 using the electronic pen 3. The core 37 is always urged rearward by an elastic member (not shown).

  A substrate 36 is provided on the front side of the core 37. The substrate 36 mounts an IC chip (not shown) and constitutes a known resonance (tuning) circuit. The IC chip mounted on the substrate 36 stores individual information that can identify the electronic pen 3 and can transmit it to the reading device 2. A detection switch 33 is mounted on the rear end of the substrate 36. A battery 34 is provided on the front side of the substrate 36. The detection switch 33 and the battery 34 are each electrically connected to the coil 35 via the substrate 36.

  The coil 35 is wound around the rear end portion of the core 37 inside the electronic pen 3. The core 37 is slightly retracted into the electronic pen 3 against the urging force of the elastic member by the pressing force when the user writes a line drawing on the paper 111. In this case, the front end portion of the lead 37 presses the detection switch 33, and the detection switch 33 is turned on.

  The smartphone 19 includes a touch panel 191 and a display 192. The touch panel 191 is used for inputting various instructions. The display 192 can display an image corresponding to the image file. A general-purpose PC or a tablet PC may be used instead of the smartphone 19.

  The electrical configuration of the handwriting input system 1 will be described with reference to FIG. First, the electrical configuration of the reading device 2 will be described. The reading device 2 includes sensor boards 7L and 7R, a main board 20, sensor control boards 28 and 29, an input unit 25, and three LEDs 5. The sensor substrates 7L and 7R are provided in the left reading device 2L and the right reading device 2R, respectively. The input unit 25 and the three LEDs 5 are provided in the right reading device 2R.

  The main board 20 includes a CPU 21, a RAM 22, a flash ROM 23, and a wireless communication unit 24. The RAM 22, the flash ROM 23, and the wireless communication unit 24 are electrically connected to the CPU 21. The CPU 21 controls the reading device 2. The RAM 22 temporarily stores various data such as calculation data. The flash ROM 23 stores a program executed by the CPU 21 to control the reading device 2. The wireless communication unit 24 is a controller for executing short-range wireless communication with an external electronic device.

  The input unit 25 and the three LEDs 5 are electrically connected to the CPU 21. The input unit 25 is a switch for inputting an instruction to the reading device 2. The colors of the three LEDs 5 are yellow, green, and red.

  On the sensor boards 7L and 7R, a large number of elongated loop coils are arranged in the vertical direction and the horizontal direction, respectively. The sensor board 7L is electrically connected to the ASIC 28A of the sensor control board 28. The ASIC 28A detects coordinate data indicating the position of the electronic pen 3 when a writing operation by the electronic pen 3 is performed on the sensor substrate 7L. The sensor board 7R is electrically connected to the ASIC 29A of the sensor control board 29. The ASIC 29A detects coordinate data when a writing operation by the electronic pen 3 is performed on the sensor substrate 7R. Of the ASICs 28A and 29A, the ASIC 28A on the master side is directly connected to the CPU 21, and the ASIC 29A on the slave side is connected to the CPU 21 via the ASIC 28A.

  The principle by which coordinate data is detected when a writing operation with the electronic pen 3 is performed on the sensor substrates 7L and 7R will be schematically described. The CPU 21 controls the ASICs 28A and 29A to flow currents of specific frequencies (excitation transmission currents) one by one through the respective loop coils of the sensor substrates 7L and 7R. Thereby, a magnetic field is generated from each of the loop coils of the sensor substrates 7L and 7R. In this state, for example, when the user performs an operation of writing a line drawing on the paper 111 of the paper medium 100 mounted on the reading device 2 using the electronic pen 3, the detection switch 33 is turned on and the electronic pen 3 is close to the sensor substrates 7L and 7R. Therefore, the resonance circuit of the electronic pen 3 resonates by electromagnetic induction and generates an induction magnetic field.

  The CPU 21 controls the ASICs 28A and 29A to stop the generation of magnetic fields from the respective loop coils of the sensor substrates 7L and 7R. Each loop coil of the sensor boards 7L and 7R receives an induced magnetic field generated from the resonance circuit of the electronic pen 3. The CPU 21 controls the ASICs 28A and 29A to detect signal currents (reception currents) flowing through the loop coils of the sensor boards 7L and 7R. The ASICs 28A and 29A execute this operation for all the loop coils one by one and detect the received current, whereby coordinate data indicating the position of the electronic pen 3 is detected.

  When the CPU 21 determines that the line drawing is written on the paper 111 (that is, while the detection switch 33 is in the ON state), the coordinate data of the electronic pen 3 detected via the ASICs 28A and 29A is obtained at a certain period (this embodiment). In the embodiment, it is repeatedly acquired in 10 ms) and stored in the RAM 22.

  Next, the electrical configuration of the smartphone 19 will be described. The smartphone 19 mainly includes a CPU 41, a RAM 42, a flash ROM 43, a wireless communication unit 44, an input circuit 45, an output circuit 46, a touch panel 191, and a display 192. The CPU 41 controls the smartphone 19. The CPU 41 is electrically connected to the RAM 42, the flash ROM 43, the wireless communication unit 44, the input circuit 45, and the output circuit 46.

  The RAM 42 stores various temporary data. The wireless communication unit 44 is a controller for executing short-range wireless communication with an external electronic device. The input circuit 45 performs control to send an instruction from the touch panel 191 to the CPU 41. The output circuit 46 performs control to display an image on the display 192 in accordance with an instruction from the CPU 41.

  The flash ROM 43 stores a program executed by the CPU 41. The smartphone 19 includes a medium reading device (for example, a memory card slot) not shown. The smartphone 19 can read a program stored in a storage medium (for example, a memory card) with a medium reader and install it in the flash ROM 43. Further, the program may be received from an external device (not shown) connected to the smartphone 19 or a network and installed in the flash ROM 43.

  With reference to FIGS. 3 and 4, a process in which the reading device 2 generates a stroke data file based on a line drawing written on the paper 111 and a process in a case where the smartphone 19 acquires a stroke data file from the reading device 2. The outline will be described with a specific example. As illustrated in FIG. 3, the user uses the electronic pen 3 to write the line drawing 200 indicating “123” in the writing area 111 </ b> A. The CPU 21 repeatedly acquires the coordinate data of the electronic pen 3 at a constant period while the line drawing 200 is written on the paper 111 by the electronic pen 3.

  The CPU 21 can determine in which of the writing area 111 </ b> A and the check box 111 </ b> B on the paper 111 the line drawing has been written based on the coordinate data of the electronic pen 3 continuously acquired at a constant period. When the CPU 21 determines that a line drawing has been written in the writing area 111A, the CPU 21 generates stroke data indicating one line drawing written by the electronic pen 3 based on the coordinate data continuously acquired at a constant period. And stored in the RAM 22. The line drawing for one line is a line drawing written from when the detection switch 33 is turned on to when it is turned off.

  If the CPU 21 determines that a line drawing has been written in the check box 111B based on the acquired coordinate data, the CPU 21 detects a save instruction for saving the line drawing written on the paper 111. When the CPU 21 detects the save instruction, the CPU 21 generates a stroke data file based on the plurality of stroke data stored in the RAM 22. The stroke data file includes at least stroke data indicating the line drawing 200 written in the writing area 111A. The stroke data may include, for example, the date on which the line drawing 200 was written. The CPU 21 stores the generated stroke data file in the flash ROM 23.

  When the operation of the data request command for acquiring the stroke data file from the reading device 2 is performed via the touch panel 191, the CPU 41 performs short-distance wireless communication with the reading device 2 via the wireless communication unit 44. Run. When the CPU 21 receives the data request command from the smartphone 19, the CPU 21 transmits the stroke data file stored in the flash ROM 23 to the smartphone 19. The stroke data file stored in the flash ROM 23 is wirelessly transmitted from the reading device 2 to the smartphone 19. The CPU 41 receives the stroke data file wirelessly transmitted from the reading device 2 and stores it in the RAM 42.

  Based on the stroke data file stored in the RAM 42, the CPU 41 generates an image file including a line drawing having the same shape as the line drawing 200 written on the paper 111 by the electronic pen 3. Specifically, the CPU 41 extracts a plurality of stroke data included in the received stroke data file in units of groups. The CPU 41 connects a plurality of positions indicated by each of the extracted plurality of stroke data with a straight line in the order of writing. CPU41 combines the line segment obtained for every group, and specifies the written line drawing 200. FIG. The CPU 41 generates an image file of an image including at least the specified line drawing 200. The image file is a data file that shows a line drawing as a digital image. Examples of digital images include vector images and raster images. Examples of the image file include a JPEG file, a GIF file, a PNG file, and a BMP file.

  As shown in FIG. 4, the CPU 41 can display an image 300 on the display 192 based on the generated image file. The image 300 includes “2013/3/31” indicating the date and “123” indicating the line drawing 200. Note that communication when the stroke data file is transmitted from the reading device 2 to the smartphone 19 is not limited to wireless communication, and may be wired communication.

  With reference to FIG. 5, a method of calculating the ink consumption amount by the CPU 21 will be described with a specific example. As described above, the line drawing is written on the paper 111 as the ink supplied from the ink storage unit 32 to the pen tip 31 oozes out from the pen tip 31 onto the paper 111. Hereinafter, a case where a line drawing is written on the paper 111 from the point A0 to the point A3 with the electronic pen 3 will be described. In FIG. 5, points A 0, A 1, A 2, and A 3 indicate positions where coordinate data is acquired by the CPU 21 when a line drawing is written from the point A 0 to the point A 3 with the electronic pen 3. The CPU 21 acquires coordinate data in the order of point A0, point A1, point A2, and point A3.

  Further, since the CPU 21 acquires the coordinate data at a constant cycle, the time from the point A0 acquisition until the point A1 is acquired, the time from the point A1 acquisition until the point A2 is acquired, and the point The time from when A2 is acquired until the point A3 is acquired is a predetermined time (that is, 10 ms in this embodiment). Hereinafter, the position of the electronic pen 3 acquired by the CPU 21 is referred to as a first position, and the position of the electronic pen 3 acquired by the CPU 21 after a predetermined time has elapsed since the acquisition of the first position is referred to as a second position. For example, when the point A0 is the first position, the point A1 is the second position, and when the point A1 is the first position, the point A2 is the second position.

  The distance at which the line drawing is written with the electronic pen 3 from the first position to the second position is referred to as a writing distance X. In FIG. 5, the writing distance X from the point A0 to the point A1, the writing distance X from the point A1 to the point A2, and the writing distance X from the point A2 to the point A3 are the distance X1, the distance X2, and the distance X3, respectively. It is.

  The points P0 and P1 are used to explain a reference consumption M0 described later. The points P0 to P1 are written in a predetermined time by the electronic pen 3. The distance from the point P0 to the point P1 is a predetermined distance X0.

In the present embodiment, a reference consumption M0 that is predetermined as an ink consumption when a line drawing at a predetermined distance X0 is written in a predetermined time by the electronic pen 3 is stored in the flash ROM 23. The CPU 21 calculates the specific consumption amount M based on the reference consumption amount M0 and the writing distance X at a predetermined time. The specific consumption M is an ink consumption when a line drawing is written with the electronic pen 3 during a predetermined time from the first position to the second position. Specifically, the specific consumption M when the line drawing is written by the writing distance X with the electronic pen 3 at a predetermined time is calculated based on, for example, the following formula (1) in the case of the water-based ink in the present embodiment. The
M = M0 × X0 / X (1)

  Therefore, for example, the specific consumption M from point A0 to point A1, the specific consumption M from point A1 to point A2, and the specific consumption M from point A2 to point A3 are M0 × X0 / X1, M0, respectively. × X0 / X2 and M0 × X0 / X3.

  Therefore, for example, the ink consumption amount from A0 to A2 is (M0 × X0 / X1) + (M0 × X0 / X2). As shown in FIG. 5, even when the distance from A0 to A2 is equal to the distance from P0 to P1 (that is, X1 + X2 = X0), the ink consumption may be different (that is, (M0 × X0). / X1) + (M0 × X0 / X2) ≠ M0).

  In the present embodiment, when there are a plurality of electronic pens 3, the reading device 2 can specify the electronic pen 3 currently used. Specifically, the reading device 2 specifies the electronic pen 3 by reading an IC chip mounted on the substrate 36. Accordingly, the reading device 2 can calculate the ink consumption amount corresponding to the specified electronic pen 3 and estimate the ink remaining amount of the electronic pen 3.

  In the present embodiment, an initial ink amount that is the amount of ink stored in advance in the ink storage portion 32 is stored in the flash ROM 23 in advance. The CPU 21 can initialize the remaining amount of ink stored in the flash ROM 23 when the ink of the electronic pen 3 is replaced. When the ink remaining amount is initialized, the initial ink amount is stored in the flash ROM 23 as the ink remaining amount. The CPU 21 can estimate the ink remaining amount that is the amount of ink currently mounted on the electronic pen 3 by subtracting the specific consumption amount M from the initial ink amount.

  A method for initializing the remaining amount of ink stored in the flash ROM 23 will be described. The user can replace the ink of the electronic pen 3 by replacing the ink storage unit 32 with a new ink storage unit 32. For example, when the user replaces the ink of the electronic pen 3 or when the electronic pen 3 is replaced with a new electronic pen 3, the ink remaining amount of the electronic pen 3 stored in the flash ROM 23 is initialized to the initial ink remaining amount. To do. In this case, the user causes the reading device 2 to identify the electronic pen 3 by causing the reading device 2 to read the IC chip mounted on the substrate 36. Next, the user operates the input unit 25 to initialize the ink remaining amount.

  The main process executed by the CPU 21 will be described with reference to FIG. When the power is turned on, the CPU 21 starts the main process by operating based on the program stored in the flash ROM 23.

  The CPU 21 determines whether a line drawing is written on the paper 111 with the electronic pen 3 (S11). When the line drawing is written on the paper 111 with the electronic pen 3, the detection switch 33 is turned on, so that the CPU 21 can detect that the line drawing is written on the paper 111 with the electronic pen 3. When the CPU 21 determines that the line drawing is written on the paper 111 with the electronic pen 3 (S11: YES), the CPU 21 acquires the individual information stored in the IC chip mounted on the substrate 36 and stores it in the RAM 22. Store (S12). The individual information includes at least information that can identify the electronic pen 3. Further, the CPU 21 stores the ink remaining amount of the electronic pen 3 stored in the flash ROM 23 in the RAM 22 based on the individual information.

  CPU21 acquires the coordinate data of the electronic pen 3, and memorize | stores it in RAM22 (S13). Note that the process of S13 is executed at a constant cycle from the start of writing of a line drawing on the paper 111 by the electronic pen 3 to the end thereof (that is, while the detection switch 33 is in the ON state). The CPU 21 calculates a writing distance X from the first position to the second position (S14). Specifically, the CPU 21 obtains the first position coordinate data acquired in the process of S13 and the second position acquired in the process of S13 after a lapse of a predetermined time (fixed period) after the coordinate data of the first position is acquired. The writing distance X is calculated based on the position coordinate data.

  The CPU 21 calculates the specific consumption amount M by the equation (1) based on the writing distance X and the reference consumption amount M0 in a predetermined time (S15). The CPU 21 updates the ink remaining amount of the electronic pen 3 stored in the RAM 22 in the process of S12 based on the specific consumption M calculated in the process of S15 (S16). Specifically, the CPU 21 subtracts the specific consumption amount M from the ink remaining amount of the electronic pen 3 stored in the RAM 22 and stores it in the RAM 22.

  The CPU 21 determines whether or not the writing of the line drawing on the paper 111 by the electronic pen 3 has been completed (S17). When the writing of the line drawing on the paper 111 by the electronic pen 3 has been completed, the detection switch 33 is turned off, so that the CPU 21 can detect that the writing of the line drawing on the paper 111 by the electronic pen 3 has been completed. If the CPU 21 determines that the writing of the line drawing on the paper 111 by the electronic pen 3 has not been completed (S17: NO), the electronic pen 3 is still in the ON state, and therefore a predetermined time after the process of S13 is executed. After the elapse, the process returns to the process of S13. Thereby, the CPU 21 can repeatedly acquire the coordinate data at a constant period while the line drawing is written on the paper 111 by the electronic pen 3.

  When the CPU 21 determines that the writing of the line drawing on the paper 111 by the electronic pen 3 has been completed (S17: YES), the CPU 21 determines whether a predetermined condition is satisfied based on the ink remaining amount of the electronic pen 3 stored in the RAM 22. (S21). The predetermined condition is that the ink remaining amount of the electronic pen 3 is equal to or less than a warning reference amount that is a predetermined value.

  When the CPU 21 determines that the ink remaining amount of the electronic pen 3 stored in the RAM 22 is not less than or equal to the warning reference amount (S21: NO), the CPU 21 stores the ink remaining amount of the electronic pen 3 in the flash ROM 23 and is stored in the RAM 22. The remaining ink level of the electronic pen 3 is cleared, and the process proceeds to S31.

  When the CPU 21 determines that the ink remaining amount of the electronic pen 3 stored in the RAM 22 is equal to or less than the warning reference amount (S21: YES), the CPU 21 performs notification regarding the ink remaining amount of the electronic pen 3 (S22). Specifically, the CPU 21 causes the LED 5 to emit light in a predetermined manner indicating a decrease in the remaining ink amount. In addition, the CPU 21 transmits an instruction for causing the smartphone 19 to perform notification regarding the remaining ink amount of the electronic pen 3 via the wireless communication unit 24. The instruction is an instruction to display the predetermined image 301 on the display 192 as shown in FIG. The predetermined image 301 includes “A decrease in the ink level of the pen has been detected. Replace the ink.” In step S22, the CPU 21 stores the ink remaining amount of the electronic pen 3 in the flash ROM 23 and clears the ink remaining amount stored in the RAM 22.

  The CPU 21 determines whether a save instruction has been detected (S31). Specifically, when a line drawing is written in the CPU 21 and the check box 111B, a save instruction is detected based on the coordinate data acquired in the process of S13.

  If the CPU 21 determines that a save instruction has not been detected (S31: NO), the CPU 21 determines that a line drawing has been written in the writing area 111A. CPU21 produces | generates stroke data based on the coordinate data acquired by the process of S13, and memorize | stores it in RAM22 (S32). CPU21 returns a process to the process of S11. When the CPU 21 determines that a save instruction has been detected (S31: YES), the CPU 21 generates a stroke data file including a plurality of stroke data stored in the RAM 22 in the process of S32 and stores it in the flash ROM 23 (S33). CPU21 clears the stroke data memorize | stored in RAM22, and returns a process to the process of S11.

  When determining that the line drawing is not written on the paper 111 with the electronic pen 3 (S11: NO), the CPU 21 determines whether a data request command has been received from the smartphone 19 via the wireless communication unit 24 (S41). .

  CPU21 returns a process to the process of S11, when it is judged that the data request command is not received from the smart phone 19 via the wireless communication part 24 (S41: NO). If the CPU 21 determines that a data request command has been received from the smartphone 19 via the wireless communication unit 24 (S41: YES), the stroke stored in the flash ROM 23 in the process of S33 on the smartphone 19 via the wireless communication unit 24 The data file is transmitted (S42). The CPU 21 clears the stroke data file stored in the flash ROM 23, and returns the process to the process of S11.

  As described above, according to the present embodiment, the CPU 21 acquires the coordinate data of the first position (S13). CPU21 acquires the coordinate data of a 2nd position after progress of predetermined time, after acquiring the coordinate data of a 1st position by the process of S13 (S13). The CPU 21 calculates the writing distance X from the first position to the second position based on the coordinate data of the first position and the second position acquired in the process of S13 (S14). The CPU 21 calculates a specific consumption amount M of the electronic pen 3 in which a line drawing is written from the first position to the second position according to the formula (1) based on the writing distance X and the reference consumption M0 in a predetermined time (S15). The reference consumption amount M0 is a reference amount that is predetermined as an ink consumption amount when a line drawing at a predetermined distance X0 is written by the electronic pen 3 for a predetermined time. Therefore, the reading device 2 can estimate the ink consumption with high accuracy.

  The CPU 21 acquires individual information stored in the IC chip mounted on the substrate 36 (S12), and stores the ink remaining amount of the electronic pen 3 in the RAM 22 out of the ink remaining amount stored in the flash ROM 23. . CPU21 calculates specific consumption M based on Formula (1) (S15). The CPU 21 updates the ink remaining amount of the electronic pen 3 stored in the RAM 22 in the process of S12 based on the specific consumption M calculated in the process of S15 (S16). Accordingly, the reading device 2 can calculate the ink consumption amount corresponding to the individual information of the electronic pen 3 and can update the remaining ink amount. Therefore, even when there are a plurality of types of electronic pens 3, the reading device 2 can estimate the ink consumption amount according to each of them.

  The CPU 21 performs notification regarding the ink remaining amount of the electronic pen 3 (S22). Therefore, the reading device 2 can notify the user of the ink remaining amount of the electronic pen 3. Thereby, the user can grasp the ink remaining amount of the electronic pen 3.

  When the CPU 21 determines that the ink remaining amount of the electronic pen 3 stored in the RAM 22 is equal to or less than the warning reference amount (S21: YES), the CPU 21 performs notification regarding the ink remaining amount of the electronic pen 3 (S22). Therefore, the reading device 2 can notify the user that the predetermined condition is satisfied based on the ink remaining amount of the electronic pen 3. Thereby, the user can grasp that the remaining amount of ink of the electronic pen 3 is, for example, a small amount. Therefore, the reading device 2 can suppress the ink from running out while the user is writing a line drawing with the electronic pen 3.

  The reading device 2 includes an LED 5 that can emit light. The CPU 21 notifies the ink remaining amount of the electronic pen 3 by causing the LED 5 to emit light in a predetermined manner indicating a decrease in the ink remaining amount (S22). Therefore, the reading device 2 can notify the user of the ink remaining amount of the electronic pen 3 by causing the LED 5 to emit light. The user can grasp the decrease in the ink remaining amount of the electronic pen 3 by visually recognizing that the LED 5 emits light in a predetermined manner indicating the decrease in the ink remaining amount.

  The reading device 2 includes a wireless communication unit 24 that can communicate with an external electronic device. CPU21 transmits the instruction | indication which performs the alerting | reporting regarding the ink residual amount of the electronic pen 3 to the smart phone 19 via the wireless communication part 24 (S22). Therefore, the reading device 2 can notify the user of the ink remaining amount of the electronic pen 3 using the smartphone 19. The user can grasp the ink remaining amount of the electronic pen 3 on the smartphone 19 side which is an external electronic device.

  The CPU 21 transmits an instruction to display the predetermined image 301 on the display 192 to the smartphone 19 via the wireless communication unit 24 (S22). Therefore, the reading device 2 can notify the user of the ink remaining amount of the electronic pen 3 by displaying the predetermined image 301 on the display 192. The user can grasp the ink remaining amount of the electronic pen 3 by visually recognizing the predetermined image 301 displayed on the display 192.

  In the above embodiment, the reading device 2 corresponds to the “information input device” of the present invention. The electronic pen 3 corresponds to the “writing instrument” of the present invention. The paper medium 100 corresponds to the “recording medium” of the present invention. The sensor boards 7L and 7R and the sensor control boards 28 and 29 correspond to the “detecting means” of the present invention. CPU21 which performs the process of S13 of FIG. 6 is equivalent to the "first acquisition means" of this invention. The CPU 21 that executes the process of S14 in FIG. 6 corresponds to the “first calculation means” of the present invention. The specific consumption M corresponds to the “ink consumption” of the present invention. The CPU 21 that executes the process of S15 in FIG. 6 corresponds to the “second calculating means” of the present invention. CPU21 which performs the process of S12 of FIG. 6 corresponds to the "second acquisition means" of the present invention. CPU21 which performs the process of S22 of FIG. 6 is equivalent to the "notification means" of this invention. The CPU 21 that executes the process of S21 in FIG. 6 corresponds to the “determination means” of the present invention. The LED 5 corresponds to the “light emitting portion” of the present invention. The wireless communication unit 24 corresponds to “communication means” of the present invention. The stroke data file corresponds to “line drawing data” of the present invention. The CPU 21 that executes the process of S33 in FIG. 6 corresponds to the “generating means” of the present invention. The CPU 21 that executes the processing of S42 in FIG. 6 corresponds to the “transmission means” of the present invention.

  The process of S13 in FIG. 6 corresponds to the “first acquisition step” of the present invention. The process of S14 in FIG. 6 corresponds to the “first calculation step” of the present invention. The process of S15 in FIG. 6 corresponds to the “second calculation step” of the present invention.

  In addition, this invention is not limited to the said embodiment, A various change is possible. The method for detecting the position of the electronic pen 3 in the above embodiment can be changed to another method. For example, the reading device 2 may include a touch panel on the upper surface. In this case, the position written by the electronic pen 3 corresponds to the position where the touch panel is pressed. Therefore, the CPU 21 of the reading device 2 can acquire coordinate data indicating the position where the touch panel is pressed from the touch panel.

  When the CPU 21 of the reading device 2 determines that a line drawing has been written in the check box 111B of the paper 111, the CPU 21 may transmit the generated stroke data file to the smartphone 19 at the timing when the line drawing is written in the check box 111B. Good.

  The reading device 2 may not acquire the individual information of the electronic pen 3 from the IC chip mounted on the substrate 36. In this case, the reading device 2 may acquire the individual information of the electronic pen 3 and specify the electronic pen 3 by being input by the user via the input unit 25, for example. The reading device 2 may specify the electronic pen 3 based on the frequency of electromagnetic induction transmitted by the electronic pen 3 as individual information.

  The electronic pen 3 may include a QR code (registered trademark). The reading device 2 may include a code reading unit capable of reading a QR code (registered trademark). In this case, the individual information may be acquired by reading the QR code (registered trademark) of the electronic pen 3 by the code reading unit of the reading device 2. Further, when the read QR code (registered trademark) is a QR code (registered trademark) that has not yet been read, the reading device 2 may initialize the remaining amount of ink. Note that the method by which the reading device 2 acquires the individual information of the electronic pen 3 is not limited to the above method.

  The formula for calculating the specific consumption M is not limited to the formula (1). A plurality of equations for calculating the specific consumption M and the types of ink mounted on the electronic pen 3 may be stored in the flash ROM 23 in association with each other. The formula for calculating the specific consumption M differs depending on the type of ink mounted on the electronic pen 3. In this case, for example, the individual information may include information on the type of ink mounted on the electronic pen 3. In the process of S <b> 12, the CPU 21 reads an expression corresponding to the type of ink mounted on the electronic pen 3 from the flash ROM 23 based on the acquired individual information, and stores it in the RAM 22. In this case, the CPU 21 can calculate the specific consumption M based on the formula read from the flash ROM 23 in the process of S15. Accordingly, the reading device 2 can estimate the ink consumption based on the type of ink mounted on the electronic pen 3.

  Further, the reading device 2 may store a plurality of reference consumption amounts M0 corresponding to the types of ink mounted on the electronic pen 3 in the flash ROM 23. The reference consumption amount M0 varies depending on the type of ink mounted on the electronic pen 3. In this case, the CPU 21 reads the reference consumption M0 corresponding to the type of ink mounted on the electronic pen 3 from the flash ROM 23 and stores it in the RAM 22 based on the acquired individual information in the process of S12. In the process of S15, the CPU 21 can calculate the specific consumption M based on the reference consumption M0 read from the flash ROM 23. Accordingly, the reading device 2 can estimate the ink consumption based on the type of ink mounted on the electronic pen 3.

  The reading device 2 may not store the remaining ink amount of the electronic pen 3 in the flash ROM 23. In this case, the remaining ink amount of the electronic pen 3 may be stored in, for example, an IC chip mounted on the substrate 36 of the electronic pen 3. In this case, the CPU 21 acquires individual information including information related to the ink remaining amount of the electronic pen 3 and stores it in the RAM 22 in the process of S12. In the process of S <b> 16, the CPU 21 stores the updated ink remaining amount of the electronic pen 3 in the RAM 22 and transmits it to the electronic pen 3. The electronic pen 3 stores the received ink remaining amount of the electronic pen 3 in an IC chip mounted on the substrate 36. Further, the electronic pen 3 may further include storage means for storing the remaining ink amount of the electronic pen 3 instead of the IC chip. A communication method between the reading device 2 and the electronic pen 3 is, for example, short-range wireless communication.

  In the process of S33, the CPU 21 may generate a stroke data file including information on the first color displayed on the display 192 as the image 300 in addition to the plurality of stroke data. In the process of S22, the CPU 21 transmits an instruction to display the second color image 300 different from the first color on the display 192 to the smartphone 19 via the wireless communication unit 24 instead of the first color, and the electronic pen Notification regarding the remaining amount of ink 3 may be performed. In this case, the CPU 41 displays the second color image 300 (see FIG. 8) on the display 192 instead of the first color image 300 (see FIG. 4). The first color is, for example, black, and the second color is, for example, red. The first color and the second color are not limited to this. For example, the first color may be the same color as the ink mounted on the electronic pen 3 and the second color may be a different color from the ink mounted on the electronic pen 3.

  In the above case, the reading apparatus 2 can notify the user of the ink remaining amount of the electronic pen 3 by displaying the image 300 on the display 192 by changing the color displayed from the first color to the second color. In this case, the color of the part corresponding to the line drawing may be changed from the first color to the second color, or the color of the part not corresponding to the line drawing may be changed from the first color to the second color. Further, the color of a part of the image 300 may be changed from the first color to the second color.

  The reading device 2 may include a speaker that can generate sound. In the process of S <b> 22, the CPU 21 may notify the remaining amount of ink of the electronic pen 3 by generating a sound through the speaker of the reading device 2. Further, the reading device 2 may include a display unit that indicates the remaining ink amount of the electronic pen 3. In the process of S <b> 22, the CPU 21 may notify the ink remaining amount of the electronic pen 3 by displaying the ink remaining amount on the display unit of the reading device 2. The smartphone 19 may include a speaker that can generate a warning sound. In the process of S <b> 22, the CPU 21 may transmit an instruction to generate a warning sound from the speaker of the smartphone 19 to the smartphone 19 via the wireless communication unit 24 and perform notification regarding the ink remaining amount of the electronic pen 3. In this case, the CPU 41 generates a warning sound on the speaker of the smartphone 19.

  The electronic pen 3 may include a light emitting unit that emits light. In the process of S <b> 22, the CPU 21 may transmit an instruction for causing the light emitting unit of the electronic pen 3 to emit light to the electronic pen 3 and notify the remaining amount of ink of the electronic pen 3. In this case, the electronic pen 3 causes the light emitting unit of the electronic pen 3 to emit light. The electronic pen 3 may include a speaker that generates a warning sound. In the process of S <b> 22, the CPU 21 may transmit an instruction for generating a warning sound from the speaker of the electronic pen 3 to the electronic pen 3 and notify the ink remaining amount of the electronic pen 3. In this case, the electronic pen 3 generates a warning sound through the speaker of the electronic pen 3.

  In the present embodiment, the method for notifying the ink remaining amount of the electronic pen 3 is not limited to the above method. Further, the number of methods for notifying the remaining ink amount of the electronic pen 3 may be one, or a plurality of methods may be used.

  In the above embodiment, the predetermined condition is that the remaining amount of ink is equal to or less than the warning reference amount, but is not limited thereto. The predetermined condition may be, for example, that the remaining amount of ink is a warning reference amount. In this case, when the remaining ink amount reaches the warning reference amount, the notification is made only once.

  In the process of S16, the CPU 21 estimates the ink remaining amount while subtracting the specific consumption amount M from the initial ink amount, but the ink remaining amount may not be estimated. For example, in the process of S16, the CPU 21 may add the specific consumption amount M calculated in the process of S15 from 0 as the ink consumption amount. In this case, the CPU 21 may initialize the ink consumption amount added and stored in the flash ROM 23 to 0, for example, when the ink of the electronic pen 3 is replaced. In this case, the predetermined condition is, for example, that the ink consumption stored in the RAM 22 is greater than or equal to a predetermined warning reference amount by adding the specific consumption M from 0 as the ink consumption. Also good.

  The electronic pen 3 is not limited to a sign pen, and may be a ballpoint pen or the like. The ink stored in the ink storage unit 32 is not limited to water-based ink, and may be oil-based ink or the like.

1 Handwriting input system 2 Reading device 3 Electronic pen 7L, 7R Sensor board 19 Smartphone 21 CPU
22 RAM
23 Flash ROM
24 Wireless communication units 28, 29 Sensor control board 100 Paper medium 301 Predetermined image M Specific consumption M0 Reference consumption X Writing distance X0 Predetermined distance

Claims (9)

Detection means capable of detecting the position of a writing instrument capable of writing a line drawing on a recording medium with ink;
First acquisition means for acquiring the position of the writing instrument detected by the detection means;
The first position, which is the position of the writing instrument acquired by the first acquisition means, and the position of the writing instrument acquired by the first acquisition means after a lapse of a predetermined time from the acquisition of the first position. Based on two positions, a first calculation means for calculating a writing distance that is a distance by which a line drawing is written from the first position to the second position by the writing tool;
Based on the writing distance calculated by the first calculation means and a reference consumption amount that is predetermined as the amount of the ink that is consumed when the line drawing of the predetermined distance is written by the writing instrument at the predetermined time, An information input device comprising: a second calculation unit that calculates an ink consumption amount that is an amount of the ink consumed to write a line drawing from the first position to the second position. Comprising second acquisition means for acquiring individual information capable of specifying the writing instrument;
The information input apparatus according to claim 1, wherein the second calculation unit calculates the ink consumption amount corresponding to the individual information acquired by the second acquisition unit.   2. An informing means for informing about an ink remaining amount which is an amount of the ink currently mounted on the writing instrument based on the ink consumption calculated by the second calculating means. Or the information input device of 2. Determination means for determining whether a predetermined condition is satisfied based on the ink consumption calculated by the second calculation means;
The information input device according to claim 3, wherein the notification unit notifies the remaining amount of ink when the determination unit determines that the predetermined condition is satisfied. It has a light emitting part that can emit light,
5. The information input device according to claim 3, wherein the notification unit notifies the remaining amount of ink by causing the light emitting unit to emit light. With communication means capable of communicating with external electronic devices,
6. The information according to claim 3, wherein the notification unit transmits an instruction to execute a notification regarding the remaining amount of ink to the external electronic device via the communication unit. Input device.   The information input device according to claim 6, wherein the instruction is an instruction to display a predetermined image on the external electronic device. Generation for generating line drawing data that is data corresponding to the line drawing written on the recording medium by the writing tool and displayed in the first color based on the position of the writing tool acquired by the first acquisition means Means,
Transmitting means for transmitting the line drawing data generated by the generating means to the external electronic device via the communication means;
8. The instruction according to claim 6, wherein the instruction is an instruction to display the line drawing data transmitted by the transmission unit in a second color different from the first color instead of the first color. The information input device described. In the computer of the information input device provided with the detecting means capable of detecting the position of the writing tool capable of writing a line drawing on the recording medium with ink,
A first acquisition step of acquiring the position of the writing instrument detected by the detection means;
The first position, which is the position of the writing instrument acquired by the first acquisition step, and the position of the writing instrument acquired by the first acquisition step after elapse of a predetermined time after the first position is acquired. Based on two positions, a first calculation step of calculating a writing distance, which is a distance at which a line drawing is written from the first position to the second position by the writing tool;
Based on the writing distance calculated by the first calculating step and a reference consumption amount that is predetermined as the amount of the ink that is consumed when the line drawing of the predetermined distance is written by the writing tool at the predetermined time, A second calculation step of calculating an ink consumption amount that is an amount of the ink consumed for writing a line drawing from the first position to the second position.