JP2018049414A - Information terminal device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information terminal device that, even when writing instruments respectively have cores made of materials different from each other, can accurately determine and notify a user of the lives of pen points of the writing instruments, and a program.SOLUTION: An information terminal device 1 comprises: a liquid crystal display part 32 that displays an image; a touch pad 33 that receives a touch input with a stylus pen 20 to the liquid crystal display part 32; and a control part 50. The control part 50 acquires information on the material of the core 22 of the stylus pen 20, determines the life of the core 22 on the basis of the total writing distance of the stylus pen 20 on an input receiving part and the information on the material of the core 22, and performs notification based on a result of life determination.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an information terminal device capable of handwriting input using a writing instrument such as a stylus pen and a program used for the information terminal device.

  Conventionally, in an information terminal device such as a tablet terminal, handwriting input can be performed on a touch panel using a writing tool such as a stylus pen (touch pen). In such an information terminal device, the nib (core) of the writing tool is worn with the use of the writing tool. As the nib wear increases, the writing comfort of the writing instrument deteriorates. Moreover, when the wear of the pen tip advances, the distance between the writing instrument and the touch panel becomes shorter. In the case where the input of the writing instrument is received by an electromagnetic induction type or capacitive type touch panel, the detection accuracy of the input position is reduced when the distance between the writing instrument and the touch panel is shortened in this way. This makes it difficult to input details.

  Patent Document 1 below describes a configuration that predicts the life of a writing instrument based on the writing distance of the writing instrument. In this configuration, since it is displayed that the writing instrument is almost at the end of its life, the user can know when to replace the writing instrument.

JP-A-8-137724

  In information terminal devices such as tablet terminals, various material nibs (cores) have been developed and commercialized from the viewpoint of pursuing writing comfort. Specifically, there are materials such as POM, industrial lasters, and ferrules. If the material of the nib (core) is different, there will be a difference in the amount of wear due to writing, and the life of the nib (core) will be greatly different. Since the method of the above-mentioned Patent Document 1 simply estimates the life of the stylus pen from the writing distance, if a nib (core) of a material different from the material assumed at the time of design is used, the nib A large error occurs in the life estimation.

  In view of such a problem, the present invention provides an information terminal device and a program that can appropriately determine the life of a lead in each writing instrument and notify the user even when the lead material is different for each writing instrument. Objective.

  A first aspect of the present invention relates to an information terminal device. The information terminal device according to the present aspect includes a display unit that displays an image, an input reception unit that receives an input from the writing tool with respect to the display unit, and a control unit. The control unit obtains information on a core material of the writing instrument, determines a life of the core based on a writing distance by the writing tool in the input receiving unit, and information on the core material, and the life Notification based on the determination result is performed.

  According to the information terminal device of this aspect, since the core material is added to the writing distance and the life of the core is determined, even when the core material is different for each writing instrument, the life of the core in each writing instrument is appropriately set. It can be determined and notified to the user.

  According to a second aspect of the present invention, information related to a core material of the writing instrument is provided in a control unit of an information terminal device including a display unit that displays an image and an input receiving unit that receives input from the writing instrument with respect to the display unit. A program for providing a function of acquiring and determining the life of the lead based on the writing distance by the writing tool in the input receiving unit and information on the material of the lead, and performing notification based on the result of the determination of the life It is.

  By mounting the program according to this aspect on the information terminal device, the same effect as in the first aspect can be obtained.

  As described above, according to the present invention, it is possible to provide an information terminal device and a program capable of appropriately determining the life of the lead in each writing instrument and informing the user even when the lead material is different for each writing instrument. Can do.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the embodiment described below is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

FIG. 1A is a front view of an information terminal device according to the first embodiment, and FIG. 1B is a diagram illustrating a cross section of the information terminal device according to the first embodiment. FIG. 2A is a diagram schematically illustrating the configuration of the stylus pen (writing instrument) according to the first embodiment before the lead is attached. FIG. 2B is a diagram schematically showing the configuration of the stylus pen (writing instrument) after the lead is attached according to the first embodiment. FIG. 3A is a block diagram illustrating a configuration of the information terminal device according to the first embodiment. FIG. 3B is a block diagram illustrating a configuration of the stylus pen (writing instrument) according to the first embodiment. FIGS. 4A and 4B are diagrams illustrating the data configurations of the material DB and the pen table according to the first embodiment, respectively. FIG. 5 is a diagram illustrating a screen that accepts input of information related to the core material according to the first embodiment. FIGS. 6A and 6B are diagrams illustrating a state in which a user starts a handwriting application and performs handwriting input on the touch panel with a stylus pen according to the first embodiment. FIG. 7A is a flowchart illustrating processing for registering a pen ID and specifying a target pen according to the first embodiment. FIG. 7B is a diagram illustrating a configuration of the management table according to the first embodiment. FIG. 8 is a flowchart illustrating the life determination process according to the first embodiment. FIGS. 9A and 9B are diagrams showing display forms when the pen core according to the first embodiment has reached the end of its life. FIG. 10A is a diagram illustrating the configuration of the material DB according to the first modification of the first embodiment. FIG. 10B is a diagram illustrating a configuration of the management table according to the first modification of the first embodiment. FIG. 11 is a flowchart illustrating the life determination process according to the first modification of the first embodiment. FIG. 12 is a block diagram illustrating a configuration of the stylus pen according to the second modification of the first embodiment. FIG. 13 is a block diagram illustrating a configuration of the information terminal device according to the second modification of the first embodiment. FIG. 14A is a diagram illustrating a data configuration of the pen DB according to the second embodiment. FIG. 14B is a flowchart showing the core material registration process for the pen table according to the second embodiment. FIG. 15 is a flowchart illustrating a core material registration process for a pen table according to a modification example (modification example 3) of the second embodiment.

  In the present embodiment, the present invention is applied to a tablet terminal which is a kind of information terminal device. The information terminal device of this embodiment is assumed to be used for educational purposes, for example. The present invention is not limited to a tablet terminal, and may be applied to other types of information terminal devices such as a mobile phone, a portable game machine, and a notebook computer.

<Embodiment 1>
In the first embodiment, it is assumed that a user or an administrator inputs and sets a core material for each stylus pen. The core material set for each stylus pen is maintained regardless of the replacement of the core until the user or the administrator registers another core material again. In addition, a material database (hereinafter referred to as “material DB”) in which the core material is associated with the threshold of the writing distance until the end of the life is held in the information terminal device in advance. The life of the lead attached to the stylus pen is determined based on whether or not the writing distance using the lead has reached the threshold value associated with the material of the lead.

  FIG. 1A is a front view of the information terminal device 1, and FIG. 1B is a diagram showing a cross section of the information terminal device 1. 1A and 1B show XYZ axes orthogonal to each other for convenience. The X-axis direction is a direction in which a short side of an input receiving surface 31a described later extends, the Y-axis direction is a direction in which a long side of the input receiving surface 31a extends, and the Z-axis direction is perpendicular to the input receiving surface 31a. Direction.

  As illustrated in FIGS. 1A and 1B, the information terminal device 1 includes a housing 10, a plurality of stylus pens 20, a touch panel 30, and a camera unit 40. The housing 10 is provided with a plurality of housing portions 11 for housing the stylus pens 20. The stylus pen 20 includes a round bar-shaped body 21 held by a hand and a core 22 that can be attached to and detached from the body 21. Each stylus pen 20 can be equipped with a core 22 made of any material by the user. Examples of the material of the core 22 that can be selected include POM, industrial laster, and ferrule.

  In FIG. 1 (a), three accommodating portions 11 and three stylus pens 20 are shown. However, the number of accommodating portions 11 and the number of stylus pens 20 are not limited to three. There may be two, or four or more.

  The touch panel 30 has a configuration in which a cover 31, a liquid crystal display unit 32, and a touch pad 33 are stacked in the Z-axis direction.

  The cover 31 is transparent and covers the housing 10. The front side surface (the surface on the Z-axis positive side) of the cover 31 is a flat surface. Input to the liquid crystal display unit 32, that is, the touch pad 33 is performed via the input receiving surface 31 a of the cover 31. The input receiving surface 31 a is a rectangular surface located at the center portion of the front side surface of the cover 31, and corresponds to an area on the touch pad 33 that can receive input. The input receiving surface 31a is configured to have different vertical and horizontal lengths.

  The liquid crystal display unit 32 includes a liquid crystal panel and an LED backlight that illuminates the liquid crystal panel, and displays various images. The information terminal device 1 may use a display unit other than the liquid crystal display unit 32, for example, an organic EL type display unit.

  The touch pad 33 is transparent, is disposed on the display surface of the liquid crystal display unit 32, and receives input (hereinafter referred to as “touch input”) to the liquid crystal display unit 32 by the stylus pen 20 via the input reception surface 31a. The touch pad 33 is an electromagnetic induction type digitizer. On the touch pad 33, coils are arranged at coordinate positions of the X axis and the Y axis. The input coordinates of the stylus pen 20 are detected by detecting current excited by electromagnetic induction with the coil on the stylus pen 20 side by these coils. Since the configuration of the digitizer and the detection principle are already known, a detailed description is omitted here.

  The camera unit 40 is disposed at a peripheral position of the touch panel 30 in the housing 10 and photographs a subject in front of the touch panel 30.

  FIGS. 2A and 2B are diagrams showing the configuration of the stylus pen 20.

  As described above, the stylus pen 20 includes the body 21 and the core 22. The core 22 has a cylindrical shape with a predetermined length, and the tip is rounded into a hemisphere. A cylindrical hole 21 a into which the core 22 can be inserted is formed at the tip of the body 21. The depth of the hole 21 a is shallower than the length of the core 22. By inserting the core 22 into the hole 21 a, the core 22 is attached to the body 21 with the tip protruding from the body 21. Thereby, the stylus pen 20 can be used.

  As shown in FIG. 2A, a plurality of cores 22 are a set. When the tip of the lead 22 attached to the body 21 is worn by writing, the lead 22 is pulled out from the hole 21a and replaced with a new lead 22.

  FIG. 3A is a block diagram illustrating a configuration of the information terminal device 1.

  The information terminal device 1 includes a control unit 50 and a storage unit 60 in addition to the liquid crystal display unit 32, the touch pad 33, the stylus pen 20, and the camera unit 40 shown in FIGS. The control part 50 and the memory | storage part 60 are accommodated in the housing | casing 10 shown to Fig.1 (a).

  The control unit 50 includes a CPU, a timer, and the like. The control unit 50 receives signals from each unit of the information terminal device 1, and controls each unit of the information terminal device 1 according to a program stored in the storage unit 60.

  The storage unit 60 includes a ROM, a RAM, a flash memory, and the like. The storage unit 60 stores a life determination program 61, a management table 62, a material DB 63, and a pen table 64. As will be described later, the life determination program 61 executes a life determination process for the lead 22 while referring to the management table 62. The management table 62 holds the writing distance of the lead 22 for each stylus pen 20. The configurations of the material DB 63 and the pen table 64 will be described later with reference to FIGS. 4 (a) and 4 (b). The storage unit 60 stores programs for various applications such as a handwriting application in addition to the life determination program 61 and the management table 62.

  FIG. 3B is a block diagram showing the configuration of the stylus pen 20.

  The stylus pen 20 includes a control unit 201, a storage unit 202, a writing pressure detection unit 203, a coil unit 204, and a power supply unit 205.

  The control unit 201 controls each unit according to a program stored in the storage unit 202. The storage unit 202 stores writing tool information (pen ID) for identifying the stylus pen 20 together with a program executed by the control unit 201. The writing pressure detection unit 203 detects the writing pressure applied to the core 22 during writing. For example, the writing pressure detection unit 203 includes a pressure sensor such as a piezoelectric element installed at the bottom of the hole 21a in FIG.

  As described above, the coil unit 204 includes a coil for exciting a current by electromagnetic induction with respect to the coil arranged at each coordinate position on the touch pad 33 of the information terminal device 1. The power supply unit 205 includes power storage means such as a capacitor, and accumulates electric power excited in the coil of the coil unit 204 by the coil on the touch pad 33 side during the writing operation. The power supply unit 205 supplies the accumulated power to the control unit 201, the storage unit 202, and the writing pressure detection unit 203.

  The coil unit 204 also functions as a communication unit for transmitting / receiving data to / from the information terminal device 1. That is, signal transmission / reception is performed between the coil of the coil unit 204 and the coil of the touch pad 33 by electromagnetic induction. Signal transmission / reception is performed, for example, by superimposing a signal waveform on a current excited from one coil to the other during a writing operation by the stylus pen 20.

  When the writing operation is started, the control unit 201 transmits the identification information (pen ID) stored in the storage unit 202 to the information terminal device 1 via the coil unit 204 at a constant cycle. The transmitted identification information (pen ID) is acquired by the control unit 50 on the information terminal device 1 side via the coil of the touch pad 33. In addition, during the writing operation, the control unit 201 samples a detection signal (writing pressure information) input from the writing pressure detection unit 203 at any time during a predetermined sampling period, and the sampling value is transmitted through the coil unit 204 at any time. To the information terminal device 1. The transmitted sampling value (writing pressure information) is acquired by the control unit 50 on the information terminal device 1 side via the coil of the touch pad 33.

  4A and 4B are diagrams showing the data structure of the material DB 63 and the pen table 64. FIG.

  The material DB 63 has a configuration in which the material of the core 22 is associated with a threshold value. Here, the threshold value is a total writing distance until the core 22 of the corresponding material reaches the end of its life. The material DB 63 stores all the materials of the cores 22 that can be attached to the stylus pen 20 used in the information terminal device 1 and the threshold values when the information terminal device 1 is designed.

  The pen table 64 has a configuration in which a pen ID is associated with the material of the core 22 attached to the stylus pen 20 of the pen ID. The material of the lead 22 associated with each pen ID is input in advance by the user or administrator via the touch pad 33 that is an input receiving unit, and is registered in the pen table 64.

  FIG. 5 is a diagram showing a screen for accepting input of information related to the material of the core 22.

  This reception screen includes an ID area 311 for displaying a pen ID, a selection area 312 for displaying a selection candidate for a core material, and an OK key 313. Here, the pen ID in the ID area 311 is input by the user or the administrator on the reception screen before shifting to the screen of FIG. 5, for example. Alternatively, before shifting to the screen of FIG. 5, the user or the administrator brings the stylus pen 20 close to the touch pad 33, so that the stylus pen 20 is connected via the communication between the touch pad 33 and the coil unit 204. The pen ID may be transmitted to the information terminal device 1.

  In the selection area 312, selection candidates for the material of the core 22 are displayed. The displayed selection candidates are all materials held in the material DB 63 shown in FIG. The selection candidates are scrolled by touching the scroll bar. The user or administrator selects the material of the core 22 installed on the stylus pen 20 from the selection candidates displayed in the selection area 312 and touches the item of the selected material. For example, the user or administrator refers to the material of the core 22 attached to the package of the core 22 and grasps the material of the core 22 attached to the stylus pen 20. By touching the selection area 312, the item of the selected material is highlighted. Thereafter, when the user or the administrator touches the OK key 313, the selected material is registered in the pen table 64 of FIG. 4B in association with the pen ID.

  FIGS. 6A and 6B are diagrams illustrating a state in which the user starts a handwriting application and performs handwriting input on the touch panel 30 with the stylus pen 20. 4A shows a state when writing is performed with the core 22 of the material 1, and FIG. 4B shows a state when writing is performed with the core 22 of the material 2. Indicates. Here, the material 2 is more slippery than the material 1.

  When the handwriting application is activated, the handwriting input screen S is displayed on the touch panel 30 (liquid crystal display unit 32). The handwriting input screen S includes a handwriting input area S1. The user performs handwriting input with the stylus pen 20 in the handwriting input area S <b> 1 on the surface of the cover 31.

  For example, as shown in FIG. 4A, when the user holds the stylus pen 20 in the right hand and brings the stylus pen 20 close to the touch panel 30, the coordinate position of the stylus pen 20 is detected. Thereafter, when the user moves the lead 22 of the stylus pen 20 into a character or picture shape while touching the handwriting input area S1, a line is displayed along the locus of the tip of the lead 22. Here, since the material 2 is more slippery than the material 1, the distance and the swing width of the drawn line are larger in the case of FIG. 6B. Note that the thickness of the line may change depending on the writing pressure detected by the writing pressure detection unit 203.

  By the way, the core 22 attached to the stylus pen 20 is worn by friction with the cover 31 during writing. Here, slipping of the surface of the cover 31 can be suppressed to improve writing feeling. However, this increases the amount of wear of the core 22 during writing.

  When the wear of the lead 22 progresses, the lead 22 becomes difficult to slip on the surface of the cover 31, so that the writing comfort of the stylus pen 20 is deteriorated. Further, when the wear of the lead 22 proceeds, the distance between the stylus pen 20 and the touch panel 30 becomes shorter than the distance assumed at the time of design. As described above, when the distance between the stylus pen 20 and the touch panel 30 is shortened, the detection accuracy of the input position is lowered. This makes it difficult to input details.

  For this reason, when the wear amount of the lead 22 reaches a predetermined amount, it is preferable to notify the user that the lead 22 has been replaced, assuming that the lead 22 has reached the end of its life. For example, when the writing distance using the lead 22 reaches a predetermined threshold, it can be determined that the lead 22 has reached the end of its life.

  Here, when the user uses a plurality of stylus pens 20 with the cores 22 made of different materials, the stylus pens 20 have different eases of wear of the cores 22. For example, when the user uses different stylus pens 20 having different writing feelings by changing the material of the core 22, the stylus pen 20 has a different ease of wear of the core 22. In addition, each stylus pen 20 has a different color (black, red, etc.) and hardness (2B, H, etc.) or a different function (writing, eraser, etc.), so that each stylus pen 20 is different. The material of the core 22 attached to the case may be different. Even in such a case, the stylus pen 20 differs in the ease of wear of the core 22.

  Therefore, as described above, when the material of the core 22 is different for each stylus pen 20 to be used, it is necessary to determine the life of the core 22 of each stylus pen 20 in consideration of the material of the core 22.

  Therefore, in the first embodiment, for each stylus pen 20, the writing distance is managed in consideration of the material of the core 22 to determine whether the core 22 attached to each stylus pen 20 has reached the end of its life. .

  FIG. 7A is a flowchart illustrating processing for registering a pen ID in the management table 62 and specifying a target pen. The processing flow of FIG. 7A is repeatedly executed while writing is performed on the input receiving surface 31a.

  When the writing operation starts, the control unit 50 determines whether pen information including a pen ID is received from the stylus pen 20 (S101). When the pen information is received (S101: YES), the control unit 50 acquires a pen ID from the received pen information (S102), and determines whether the acquired pen ID is registered in the management table 62 (S103). .

  FIG. 7B is a diagram showing the configuration of the management table 62.

  As shown in FIG. 7B, the management table 62 stores a total writing distance using the stylus pen 20 of each pen ID and a threshold value in association with the pen ID. Here, the threshold value is determined by linking the pen table 64 shown in FIG. 4B and the material DB 63 shown in FIG. 4A with a material associated with the pen ID.

  In step S <b> 103 of FIG. 7A, it is determined whether or not the pen ID has already been registered in the management table 62. When the acquired pen ID is already registered in the management table 62 (S103: YES), the control unit 50 determines that the stylus pen 20 of the acquired pen ID is currently in use (S105). In this case, with the writing operation, the total writing distance associated with the pen ID on the management table 62 is updated.

  When the acquired pen ID is not registered in the management table 62 (S103: NO), the control unit 50 newly registers the acquired pen ID in the management table 62 (S104). At this time, the total writing distance associated with the pen ID on the management table 62 is set to zero. Further, the control unit 50 acquires the material of the core 22 associated with the acquired pen ID from the pen table 64 in FIG. 4B, and sets the threshold value associated with the acquired material in FIG. Obtained from the material DB 63. The control unit 50 causes the management table 62 to hold the threshold value thus acquired in association with the pen ID.

  Then, the control unit 50 determines that the stylus pen 20 of the acquired pen ID is currently in use (S105), and the total writing distance associated with the pen ID on the management table 62 in accordance with the writing operation. Update.

  FIG. 8 is a flowchart showing the life determination process. The processing flow of FIG. 8 is repeatedly executed while writing is performed on the input receiving surface 31a.

  When the writing operation is started, the control unit 50 starts a predetermined time (for example, about 0.1 second) from the timing at which the routine of FIG. 8 is executed last time, that is, the determination at step S201 in the previous routine becomes YES. ) Has passed. When a certain time has elapsed since the previous routine (S201: YES), the control unit 50 obtains the distance ΔD0 written with the stylus pen 20 during this certain time (S202). Here, the control unit 50 stores the trajectory (coordinate data group) written during the predetermined time in the storage unit 60 as needed, and acquires the distance ΔD0 based on the trajectory (coordinate data group). When the information terminal device 1 is activated, the distance written until a predetermined time has elapsed from the first touch input is acquired as the distance ΔD0.

  Next, the control unit 50 adds the acquired distance ΔD0 to the total writing distance D0 accumulated from the start of use of the stylus pen 20 (core 22) to update the total writing distance D0 (S203). Here, of the total writing distances in the management table 62 in FIG. 7B, the total writing distance D0 corresponding to the pen ID specified in step S105 in FIG. 7A is updated. Then, the control unit 50 determines whether or not the updated total writing distance D0 exceeds the threshold value Dth associated with the pen ID on the management table 62 (S204). Here, as described above, the threshold value Dth is set to the total writing distance until the core 22 of a predetermined material attached to the stylus pen 20 with the pen ID reaches the end of its life.

  When the updated total writing distance D0 does not exceed the threshold value Dth (S204: NO), the control unit 50 ends the current process, returns the process to step S201, and executes the next process. When the updated total writing distance D0 exceeds the threshold value Dth (S204: YES), the control unit 50 notifies that the lead 22 is to be replaced, assuming that the lead 22 has reached the end of its life (S205).

  FIG. 9A is a diagram showing a display form when the core 22 reaches the end of its life.

  In step S205 of FIG. 8, the screen shown in FIG. The screen includes a text area 301 in which a sentence for prompting replacement of the core 22 is described, and two keys 302 and 303. The key 302 is a key that is operated when the lead 22 is replaced, and the key 303 is a key that is operated when the replacement of the lead 22 is skipped.

  When exchanging the lead 22, the user touches the key 302. As a result, a sentence and an image explaining a method for replacing the lead 22 and a completion key operated when the replacement of the lead 22 is completed are displayed. The user refers to the displayed replacement method and replaces the core 22 with respect to the stylus pen 20. Thereafter, the user touches the completion button. As a result, the screen returns to the screen before the interruption. Further, in response to the touch of the completion button, the total writing distance D0 of the pen ID corresponding to the stylus pen 20 whose replacement of the lead 22 is prompted in the management table 62 of FIG. 7B is reset to zero.

  When not replacing the lead 22, the user touches the key 303. As a result, the screen returns to the screen before the interruption. In this case, as shown in FIG. 9B, the key 304 on which the character for exchanging the core is displayed is displayed at a position where the operation is not hindered on the screen after the return. The user can grasp with the key 304 that the core 22 needs to be replaced. When the user touches the key 304, the same screen as when the key 302 in FIG. 9A is touched is displayed. Thereby, the user can exchange the core 22 smoothly.

  In the example of FIGS. 9A and 9B, the notification in step S205 of FIG. 8 is performed by the display on the liquid crystal display unit 32. However, with this display or instead of this display, voice or The notification in step S205 may be performed by another notification method such as lighting of a lamp.

  In the example of FIG. 8, in steps S201 and S202, every time a certain time elapses, the distance ΔD0 written during that time is acquired and added to the total writing distance D0, but every time a predetermined distance is written. The distance may be added to the total writing distance D0 sequentially. Alternatively, the distance written between the touch input on the input receiving surface 31a and the touch release may be acquired as the distance ΔD0 and added to the total writing distance D0.

<Effect of Embodiment 1>
As mentioned above, according to Embodiment 1, the following effects are produced.

  Since the material of the lead 22 is added to the writing distance and the life of the lead 22 is determined, even when the material of the lead 22 is different for each stylus pen 20, the user can appropriately determine the life of the lead in each stylus pen 20. Can be notified.

  Further, the control unit 50 acquires the threshold value Dth corresponding to the material of the core 22 of the stylus pen 20 from the material DB 63, and compares the acquired threshold value Dth with the total writing distance D0 using the core 22 to determine the core 22. Judging the life of For this reason, the threshold value Dth used for the life determination of each core 22 can be acquired easily and smoothly.

  When it is determined that the core 22 has reached the end of its life, the control unit 50 causes the liquid crystal display unit 32 to display the screen shown in FIG. Thereby, the user can grasp | ascertain that the core 22 is a lifetime and can advance replacement | exchange of the core 22 appropriately. Also, when the user touches the key 303 on the screen of FIG. 7A, the key 304 is displayed on the screen after the return as shown in FIG. 7B. Thereby, the user can touch the key 304 at any time after the skip operation to proceed with the replacement of the lead 22.

<Modification 1>
In the first embodiment, the material of the core 22 and the threshold value Dth are associated with each other in the material DB 63. However, as illustrated in FIG. 10A, in the material DB 63, a correction coefficient for correcting the writing distance; The material of the core 22 may be associated with each other.

  In this case, the threshold value Dth is set uniformly for all the core materials. The correction coefficient associated with each core material is set so that the value obtained by dividing the threshold value Dth by the correction coefficient is the total writing distance at which the core material reaches the end of its life. That is, assuming that the correction coefficient for a standard wearable core material is 1, the writing distance corresponding to the life of the core material is set as the threshold value Dth. The higher the wear resistance of the core material relative to the standard wear resistance, the correction coefficient of the core material is set to increase away from 1, and the wear resistance of the core material is lower than the standard wear resistance. The lower the correction coefficient of the core material is set to be away from 1 in the decreasing direction. Therefore, the higher the wear resistance and the larger the correction coefficient, the larger the correction value multiplied by the total writing distance D0, and the correction value reaches the threshold value Dth with a smaller total writing distance Dth.

  In this case, the management table 62 is changed as shown in FIG. That is, the core material of each pen ID is read from the pen table 64 of FIG. 4B, and the correction coefficient An corresponding to the read pen material is read from the material DB 63. The correction coefficient An read out in this way is associated with the pen ID in the management table 62.

  Further, the flowchart of FIG. 8 is changed as shown in FIG. In the flowchart of FIG. 11, step S211 is added to the flowchart of FIG. 8, and step S204 is replaced with step S212. Other steps are the same as those in the flowchart of FIG.

  In the flowchart of FIG. 11, in step S <b> 211, the correction coefficient An corresponding to the pen ID of the stylus pen 20 being used is read from the management table 62. Then, the total correction distance D1 is acquired by multiplying the read correction coefficient An by the total writing distance D0 acquired in step S203. In step S212, it is determined whether or not the total correction distance D1 exceeds the threshold value Dth. When the total correction distance D1 exceeds the threshold value Dth (S212: YES), the lead replacement is notified that the lead 22 has reached the end of its life (S205).

  Also in the first modification, the same effect as in the first embodiment can be obtained. In the first modification, the total correction distance An is acquired by multiplying the total writing distance D0 by the correction coefficient An. However, the total correction distance D1 may be obtained by accumulating values obtained by multiplying the distance ΔD0 by the correction coefficient An.

<Modification 2>
In the first embodiment, pen information such as pen ID and writing pressure is transmitted to the information terminal device 1 side by the coil unit 204 of the stylus pen 20. However, as shown in FIG. Alternatively, a wireless communication unit 206 such as Bluetooth (registered trademark) may be provided to transmit pen information to the information terminal device 1. In this case, as shown in FIG. 13, a wireless communication unit 70 for communicating with the wireless communication unit 206 is provided in the information terminal device 1.

  In the first embodiment, the power excited by the coil unit 204 is charged in the power unit 205. However, as shown in FIG. 13, the storage battery 205a is detachable from the power unit 205. Also good.

  In the case of the configuration shown in FIG. 13, the stylus pen 20 can be multi-functionalized by arranging operation buttons for executing various functions on the stylus pen 20. For example, the stylus pen 20 can be provided with an eraser function for using the core 22 as an eraser, a function for detecting attachment / detachment of the core 22, and the like. Information indicating that the eraser function is set and information indicating that the attachment / detachment of the core 22 is detected are transmitted from the wireless communication unit 206 to the information terminal device 1 as needed.

  In the configuration of FIG. 13, the communicable distance is longer than that in the first embodiment. For this reason, various information can be appropriately transmitted from the stylus pen 20 to the information terminal device 1 in scenes other than the writing operation.

<Embodiment 2>
In the first embodiment, the material of the core 22 mounted on the stylus pen 20 is configured to be input and set by the user or the administrator to the information terminal device 1. On the other hand, in Embodiment 2, a pen database (hereinafter referred to as “pen DB”) in which a pen ID and a material are associated with each other is stored in advance in the storage unit 60 of the information terminal device 1. FIG. 14A is a diagram illustrating the configuration of the pen DB.

  In the second embodiment, the type of the core 22 that can be attached is determined in advance for each stylus pen 20. That is, in the second embodiment, it is assumed that the same pen ID is attached to the stylus pen 20 to which the same type of core 22 is attached. The pen DB stores pen IDs corresponding to all types of cores 22 that can be mounted on the stylus pen 20 at the time of design. In addition, the material of the core 22 of the type that is attached to the stylus pen 20 of each pen ID is associated with each pen ID.

  When the use of a new stylus pen 20 is started, the control unit 50 reads a core material corresponding to the pen ID of the stylus pen 20 from the pen DB, associates the read core material with the pen ID, and Register in the table 64.

  FIG. 14B is a flowchart showing a core material registration process for the pen table 64.

  For example, the controller 50 receives a pen ID from the stylus pen 20 during a writing operation or the like (S301: YES). The control unit 50 determines whether or not the received pen ID has already been registered in the pen table 64 (S302). When the pen ID has been registered (S302: YES), the control unit 50 ends the process. On the other hand, when the pen ID is not registered (S302: NO), the control unit 50 extracts the core material associated with the pen ID from the pen DB (S303), and the extracted core material corresponds to the pen ID. In addition, it is registered in the pen table 64 (S304).

  In the second embodiment, processes other than the core material registration process for the pen table 64 are performed in the same manner as in the first embodiment.

  Also in the second embodiment, the same effect as in the first embodiment can be achieved. Moreover, in Embodiment 2, since the core material corresponding to pen ID is registered into the pen table 64 automatically, the convenience of the information terminal device 1 can be improved.

<Modification 3>
In the second embodiment, pen IDs corresponding to all types of cores 22 that can be attached to the stylus pen 20 at the time of design are associated with the core material and stored in the pen DB. However, when a new type of lead 22 is commercialized after the design, it can be assumed that the stylus pen 20 to which the lead 22 is attached is given a pen ID that has not existed before. In this case, in the second embodiment, the life determination for the newly commercialized core 22 cannot be performed properly.

  Therefore, in the third modification, a database in which a pen ID and a material are associated is managed by an external server, and the information terminal device 1 accesses the server as needed to acquire a new pen ID and core material from the server. . The server updates and stores the new pen ID and core material as needed in the database. When the core material associated with the new pen ID is a new core material that is not registered in the database, a threshold value indicating the life of the core 22 is further associated with the core material and stored in the database. Is done.

  FIG. 15 is a flowchart showing a core material registration process for the pen table 64 according to the third modification. In addition, the information terminal device 1 can be connected to a server via the external network from, for example, the wireless communication unit 70 of FIG.

  In the flowchart on the information terminal device 1 side, steps S311 to S313 are added between step S303 and step S303 in FIG. When the pen ID received from the stylus pen 20 is not registered in the pen table 64 (S302: NO), the control unit 50 determines whether or not the received pen ID exists in the pen DB held in the storage unit 60. Is determined (S311). When the determination in step S311 is YES, the control unit 50 extracts a core material corresponding to the pen ID from the pen DB (S303), and registers the extracted core material in the pen table 64 (S304).

  On the other hand, when the received pen ID does not exist in the pen DB (S311: NO), the control unit 50 includes the received pen ID in the core material transmission request and transmits it to the server (S312). When the server receives the transmission request from the information terminal device 1 (S401: YES), the server searches the database based on the pen ID included in the transmission request, and extracts the core material corresponding to the pen ID from the database ( S402). At this time, when the threshold value is associated with the extracted core material, the server further acquires the threshold value from the database. Then, the server generates material information including the extracted core material (and threshold value) and pen ID (S403), and transmits the generated material information to the information terminal device 1 (S404).

  When receiving the material information from the server (S313: YES), the control unit 50 registers the core material included in the material information in the pen table 64 together with the pen ID (S304). At this time, the control unit 50 also adds the received core material and pen ID to the pen DB. Further, when the material information includes a threshold value, the control unit 50 adds the received core material and the threshold value to the material DB 63.

  According to the modified example 3, even when the stylus pen 20 to which a new pen ID is assigned after commercialization is commercialized, the core material corresponding to the pen ID can be acquired smoothly. Therefore, it is possible to appropriately determine the life of the core 22 attached to the newly commercialized stylus pen 20.

  In the second embodiment, the pen DB is stored in the storage unit 60 in advance when the information terminal device 1 is manufactured. However, the pen DB is not stored in the storage unit 60 when the information terminal device 1 is manufactured. At the start of use of the information terminal device 1, the information terminal device 1 may access the server and receive the core material corresponding to all the pen IDs. Similarly, the data in the material DB 63 shown in FIG. 4A or FIG. 10A is managed by the server, and when the information terminal device 1 starts to be used, the information terminal device 1 accesses the server, and the data in the material DB 63 May be obtained.

<Other changes>
In Embodiments 1 and 2 and Modifications 1 to 3, when it has been determined that the core 22 has reached the end of its life, a notification that prompts the replacement of the core 22 has been made, but shortly before the core 22 reaches the end of its life. It may be notified that the lead 22 will soon reach the end of its life. In this case, a threshold value slightly smaller than the threshold value Dth (for example, about 80% of the threshold value Dth) is compared with the total writing distance D0, and it is determined that the lead 22 has approached the life.

  In Embodiments 1 and 2 and Modifications 1 to 3 described above, the core 22 can be replaced or changed with respect to the stylus pen 20, but the stylus pen 20 does not necessarily need to be replaced or changed. In this case, in step S205, a notification that prompts replacement of the entire stylus pen 20 is made.

  Since the material on the surface of the cover 31 (input reception surface 31a) also affects the wear of the core 22, similarly to the material of the core 22, the material on the surface of the cover 31 (input reception surface 31a) is also taken into account. Life estimation may be performed. For example, a table in which the material on the surface of the cover 31 (input reception surface 31a) and the correction coefficient are associated is held in the information terminal device 1, and the correction coefficient corresponding to the cover 31 used in the information terminal device 1 is set. You may read out from a table | surface and may use for the correction | amendment of the threshold value of lifetime estimation, or a total writing distance.

  Further, the input receiving unit is not necessarily an electromagnetic induction type touch pad, and may be a capacitance type touch pad or the like.

  In addition, the embodiment of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

1 Information terminal device 20 Stylus pen (writing instrument)
21 body 22 core 32 liquid crystal display (display)
33 Touchpad (input reception part)
50 Control Unit 60 Storage Unit 61 Life Determination Program 62 Management Table 63 Material DB
64 pen table

Claims (6)

A display for displaying an image;
An input receiving unit for receiving input by a writing instrument for the display unit;
A control unit,
The controller is
Obtain information about the writing instrument core material,
Based on the writing distance by the writing instrument in the input reception unit and information on the material of the lead, the life of the lead is determined,
Informing based on the determination result of the life,
An information terminal device. The information terminal device according to claim 1,
The control unit receives input of information on the core material via the input receiving unit, and acquires the information.
An information terminal device. The information terminal device according to claim 1,
A communication unit;
The control unit obtains the information by accessing a server that manages information on the core material via the communication unit.
An information terminal device. In the information terminal device according to any one of claims 1 to 3,
A storage unit that stores information related to the core material and a threshold distance related to the life of the core in association with each other;
The control unit compares the writing distance with a threshold distance corresponding to information about the core material acquired for the writing instrument, and determines the life of the core.
An information terminal device. In the information terminal device according to any one of claims 1 to 4,
The writing instrument has a replaceable core,
The control unit performs notification regarding the necessity of replacement of the core as notification based on the determination result of the life,
An information terminal device. In a control unit of an information terminal device comprising: a display unit that displays an image; and an input receiving unit that receives an input by a writing instrument for the display unit;
Obtain information about the writing instrument core material,
Based on the writing distance by the writing instrument in the input reception unit and information on the material of the lead, the life of the lead is determined,
Informing based on the determination result of the life,
A program that adds functionality.

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