JP2014067252A - Writing input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the convenience.SOLUTION: A writing surface of a tablet 20 is touched by a pen 10 having an acceleration sensor 12 for repeatedly detecting a self attitude. When a drawing task is started, a CPU 24p draws a line on the writing surface so that the line appears along touch positions of the pen 10. When a deleting task is started, the CPU 24p draws a line on the writing surface so that a part of the line appearing on the writing surface is deleted along the touch positions of the pen 10. The CPU 24p also repeatedly detects the attitude of the writing surface referring to an output of the acceleration sensor 32, and selectively switches between the drawing task and the deleting task on the basis of the attitude of the pen 10 and the attitude of the writing surface.

Description

  The present invention relates to a writing input device, and more particularly to a writing input device having a writing surface written by a writing tool having a tip.

  An example of this type of device is disclosed in Patent Document 1. According to this background art, two optical sensors are provided at both ends of the pen-shaped instruction unit. On the other hand, the coordinate input device is provided with a light emitting element. The function of the indicating unit is set as a pen when light emitted from the light emitting element is detected by one light sensor, and is set as an eraser when light emitted from the light emitting element is detected by the other light sensor. . As a result, the input form can be changed as if using a normal writing instrument.

JP 2010-102378 A

  However, in the background art, there is a problem that the circuit configuration is complicated because it is necessary to provide a light-emitting element in the coordinate input device while providing an element such as an optical sensor in the indicator.

  Therefore, a main object of the present invention is to provide a writing input device capable of simplifying a circuit configuration and improving convenience.

  A writing input device according to the present invention (20: reference numeral corresponding to the embodiment; the same applies hereinafter) is a writing surface (26) to be touched by a writing instrument (10) provided with first detection means (12) for repeatedly detecting self-posture. A first drawing means (S51 to S55, S61 to S69) for drawing the writing surface in a first mode along the touch position of the writing tool, and the writing surface along the touch position of the writing tool. Second drawing means (S51 to S55, S71 to S79) for drawing in the second mode, second detection means (32, S31) for repeatedly detecting the posture of the writing surface, and the posture detected by the first detection means, Control means (S33 to S43, S13 to S17) for selectively switching between the first drawing means and the second drawing means based on the posture detected by the second detection means.

  Preferably, a limiting unit (S19) is further provided for limiting the change of the activation target selected by the control unit until the touch on the writing surface is released.

  Preferably, the posture detected by each of the first detection unit and the second detection unit corresponds to a posture with respect to the reference direction.

  More preferably, each of the first detection means and the second detection means includes an acceleration sensor (12, 32), and the reference direction corresponds to the direction of gravity.

  In one aspect, the control means includes first activation means (S41) that activates the first drawing means when the tip of the writing instrument faces the writing surface, and second drawing means when the rear end of the writing instrument faces the writing surface. The second starting means (S43) for starting is included.

  In another aspect, the control means is detected by first direction detecting means (S87) for detecting the direction of the tip of the writing instrument, second direction detecting means (S81) for detecting the direction of the writing surface, and first direction detecting means. A start control means (S89 ~) for selectively starting the first drawing means and the second drawing means by determining whether or not the determined direction belongs to an angle range based on the direction detected by the second direction detecting means S93).

  Preferably, the process of the second drawing unit corresponds to a process of deleting a part of the handwriting drawn by the first drawing unit.

  The writing control program according to the present invention is provided in a processor (24p) of a writing input device (20) having a writing surface (26) touched by a writing tool (10) provided with a first detecting means (12) for repeatedly detecting a self posture. First drawing step (S51 to S55, S61 to S69) for drawing the writing surface in the first mode along the touch position of the writing instrument, and the second drawing for drawing the writing surface in the second mode along the touch position of the writing tool Based on the steps (S51 to S55, S71 to S79), the second detection step (S31) for repeatedly detecting the posture of the writing surface, and the posture detected by the first detection step and the posture detected by the second detection step This is a writing control program for executing a control step (S33 to S43, S13 to S17) for selectively switching between the first drawing step and the second drawing step.

  The writing control method according to the present invention is a writing control executed by a writing input device (20) having a writing surface (26) touched by a writing tool (10) provided with a first detection means (12) for repeatedly detecting a self posture. A first drawing step (S51 to S55, S61 to S69) for drawing a writing surface in a first manner along the touch position of the writing instrument, and drawing the writing surface in a second manner along the touch position of the writing tool. The second drawing step (S51 to S55, S71 to S79), the second detection step (S31) to repeatedly detect the posture of the writing surface, and the posture detected by the first detection step and the second detection step. Control steps (S33 to S43, S13 to S17) for selectively switching between the first drawing step and the second drawing step based on the posture are provided.

  The external control program according to the present invention follows a writing surface (26) touched by a writing instrument (10) provided with first detection means (12) for repeatedly detecting the self posture, and an internal control program stored in the memory (34). An external control program supplied to a writing input device (20) including a processor (24p) for executing processing, wherein a first drawing step (S51 ~) draws a writing surface in a first mode along a touch position of a writing instrument. S55, S61 to S69), a second drawing step (S51 to S55, S71 to S79) for drawing the writing surface in a second mode along the touch position of the writing instrument, and a second detection step for repeatedly detecting the posture of the writing surface ( S31), and a control step (S33 to S43, S13) that selectively switches between the first drawing step and the second drawing step based on the posture detected by the first detection step and the posture detected by the second detection step. S17) For execution by the processor in cooperation with the program, an external control program.

  The writing input device (20) according to the present invention has a writing surface (26) touched by a writing tool (10) provided with a first detecting means (12) for repeatedly detecting the self posture, and an importing means (22) for taking in an external control program. And a writing input device comprising a processor (24p) for executing processing according to the external control program captured by the capturing means and the internal control program stored in the memory (34), wherein the external control program is a touch of a writing instrument. A first drawing step (S51 to S55, S61 to S69) for drawing the writing surface in the first mode along the position, and a second drawing step (S51 to S51) for drawing the writing surface in the second mode along the touch position of the writing tool. S55, S71 to S79), the second detection step (S31) for repeatedly detecting the posture of the writing surface, and the first drawing based on the posture detected by the first detection step and the posture detected by the second detection step. This corresponds to a program that executes control steps (S33 to S43, S13 to S17) for selectively switching between the image step and the second drawing step in cooperation with the internal control program.

  According to this invention, the first drawing means draws the writing surface in the first mode, while the second drawing means draws the writing surface in the second mode. The first drawing means and the second drawing means are selectively switched based on the relative posture of the writing instrument and the writing surface. As a result, the circuit configuration can be simplified and the convenience can be enhanced.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is a block diagram which shows the basic composition of one Example of this invention. It is a block diagram which shows the structure of one Example of this invention. It is a perspective view which shows an example of the external appearance of the FIG. 2 Example. It is an illustration figure which shows an example of a structure of the matrix switch provided in the touch panel. FIG. 3 is an illustrative view showing one example of a configuration of a register applied to the embodiment in FIG. 2; (A) is an illustration figure which shows an example of the relationship between the direction of a pen point, and the direction of a writing surface, (B) is an illustration figure which shows another example of the relationship between the direction of a pen point, and the direction of a writing surface. is there. (A) is an illustration figure which shows the other example of the relationship between the direction of a pen tip, and the direction of a writing surface, (B) shows the further another example of the relationship between the direction of a pen tip, and the direction of a writing surface. FIG. (A) is an illustration figure which shows an example of the operation | movement which draws a line along a handwriting, (B) is an illustration figure which shows an example of the operation | movement which deletes a line along a handwriting. It is a flowchart which shows a part of operation | movement of CPU applied to the FIG. 2 Example. It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. FIG. 11 is a flowchart showing still another portion of behavior of the CPU applied to the embodiment in FIG. 2; FIG. 10 is a flowchart showing yet another portion of behavior of the CPU applied to the embodiment in FIG. 2; It is a flowchart which shows a part of other operation | movement of CPU applied to the FIG. 2 Example. It is a flowchart which shows a part of operation | movement of CPU applied to another Example. (A) is an illustration figure which shows an example of the relationship between the direction of a pen point, and the direction of a writing surface, (B) is an illustration figure which shows another example of the relationship between the direction of a pen point, and the direction of a writing surface. is there. (A) is an illustration figure which shows the other example of the relationship between the direction of a pen tip, and the direction of a writing surface, (B) shows the further another example of the relationship between the direction of a pen tip, and the direction of a writing surface. FIG. (A) is an illustration figure which shows another example of the relationship between the direction of a pen tip, and the direction of a writing surface, (B) is the illustration which shows the other example of the relationship between the direction of a pen tip, and the direction of a writing surface. FIG. (A) is an illustration figure which shows another example of the relationship between the direction of a pen tip, and the direction of a writing surface, (B) shows another example of the relationship between the direction of a pen tip, and the direction of a writing surface. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
[Basic configuration]

  With reference to FIG. 1, the writing instrument 1 is provided with the 1st detection means 1a which detects a self attitude | position. The writing surface 2 a of the writing input device 2 is touched by the writing instrument 1. In the writing input device 2, the first drawing means 2 b draws the writing surface 2 a in the first mode along the touch position of the writing instrument 1. The second drawing means 2 c draws the writing surface 2 a in the second mode along the touch position of the writing instrument 1. The second detection means 2d repeatedly detects the posture of the writing surface 2a. The control means 2e selectively switches between the first drawing means 2b and the second drawing means 2c based on the attitude detected by the first detection means 1a and the attitude detected by the second detection means 2d.

The first drawing unit 2b draws the writing surface 2a in the first mode, while the second drawing unit 2c draws the writing surface 2a in the second mode. The first drawing means 2b and the second drawing means 2c are selectively switched based on the relative posture of the writing instrument 1 and the writing surface 2a. As a result, the circuit configuration can be simplified and the convenience can be enhanced.
[Example]

  2 and 3, the handwriting input system 100 of this embodiment is formed by a pen 10 having a sharp tip and a rounded rear end, and a tablet 20 having a writing surface, that is, a touch panel 26. Both the pen 10 and the tablet 20 are driven by a battery (not shown).

  In the tablet 20, a matrix switch MSW shown in FIG. 4 is provided on the surface of the touch panel 26. 4, a plurality of switches SW, SW,... Are arranged in a matrix in each of the X-axis direction and the Y-axis direction.

  When the writing surface is touched, the output of the switch SW provided in the vicinity of the touch coordinates is updated from the L level to the H level. That is, when a coordinate indicated by a circle in FIG. 4 is touched, the output of the switch SW at this coordinate is updated. Thereby, the touch on the writing surface and the coordinates on the writing surface touched are found.

  When the touch coordinates move in the X direction and / or Y direction, the output of the switch SW near the coordinates before the movement is updated from the H level to the L level, and the switch SW near the coordinates after the movement changes from the L level. Updated to H level.

  The acceleration sensor 12 is fixedly built in the pen 10 and the acceleration sensor 32 is fixedly built in the tablet 20. The acceleration sensor 12 detects the gravitational acceleration in addition to the acceleration urged by the pen 10, and the acceleration sensor 32 detects the gravitational acceleration in addition to the acceleration urged by the tablet 20.

  Therefore, the detection result of the acceleration sensor 12 represents the resultant force of the acceleration biased by the pen 10 and the gravitational acceleration, and the detection result of the acceleration sensor 32 represents the resultant force of the acceleration biased by the tablet 20 and the gravitational acceleration. The posture of the pen 10 (the direction of the tip of the pen 10 with respect to the direction of gravity) can be specified based on the detection result of the acceleration sensor 12. Similarly, the posture of the tablet 20 (the direction of the writing surface with respect to the direction of gravity) can be specified based on the detection result of the acceleration sensor 32.

  When the writing surface is touched, the CPU 24 p issues a posture information request to the outside through the communication I / F 22. When the pen 10 is present around the tablet 20, that is, when the front end or the rear end of the pen 10 is touched on the writing surface, the posture information request is received by the communication I / F 14 provided in the pen 10. The communication I / F 14 returns the detection result of the acceleration sensor 12 to the request source as posture information. When the pen 10 is not present in the vicinity, that is, when an object different from the pen 10 is touched on the writing surface, the posture information request issued from the communication I / F 22 is ignored.

  If the posture information is not acquired by the communication I / F 22 within the predetermined time, the CPU 24p sets the operation mode to the drawing mode. On the other hand, if the posture information is acquired by the communication I / F 22 within the predetermined time, the CPU 24p detects the direction of the tip of the pen 10 based on the acquired posture information and the detection result of the acceleration sensor 22. The direction of the writing surface is detected based on the above, and the operation mode is set to one of the drawing mode and the deletion mode based on the direction thus detected.

  That is, when the writing surface direction has an upward component as shown in FIG. 6 (A) and the tip direction of the pen 10 has a downward component, or the writing surface as shown in FIG. 7 (A). 2 has a downward component and the direction of the tip of the pen 10 has an upward component, it is considered that the tip of the pen 10 faces the writing surface, and the operation mode is set to the drawing mode. .

  On the other hand, as shown in FIG. 6B, the direction of the writing surface has an upward component and the rear end direction of the pen 10 has a downward component, or as shown in FIG. Thus, when the direction of the writing surface has a downward component and the direction of the rear end of the pen 10 has an upward component, the rear end of the pen 10 is regarded as facing the writing surface, and the operation mode is Set to delete mode. The selected operation mode is fixed until the touch on the writing surface is released.

  In both the drawing mode and the deletion mode, the CPU 24p repeatedly detects the touch coordinates based on the output of the matrix switch MSW. The detected touch coordinates are sequentially registered in a plurality of columns provided in the register 30 in the manner shown in FIG. The variable K is incremented from “0” every time the registration of touch coordinates is completed, and the registration destination column is identified by the variable K.

  Subsequently, the CPU 24p sets the variables L and M to “0” and “1”, detects the touch coordinates registered in the Lth column of the register 30 as the start point coordinates, and sets the variables in the Mth column of the register 30. The registered touch coordinates are detected as end point coordinates.

  In the drawing mode, the CPU 24p draws the display device 28 so that a line connecting the detected start point coordinates and end point coordinates appears on the writing surface. On the other hand, in the deletion mode, the CPU 24p draws the display device 28 so that a part of the line appearing on the writing surface is deleted at a position connecting the detected start point coordinates and end point coordinates.

  The variables L and M are incremented every time a line connecting the start point coordinates and the end point coordinates is drawn, and the above-described processing is executed while paying attention to the incremented variables L and M. Thereby, in the drawing mode, a line extending along the handwriting appears on the display device 28 (see FIG. 8A), and in the deletion mode, the line appearing on the display device 28 is deleted along the handwriting (FIG. 8B). )reference).

  The CPU 24p performs a plurality of tasks including a main task shown in FIGS. 9 to 10, a coordinate registration task shown in FIG. 11, a drawing task shown in FIG. 12, and a deletion task shown in FIG. Run. Note that control programs corresponding to these tasks are stored in the ROM 34.

  Referring to FIG. 9, in step S <b> 1, whether or not the writing surface has been touched is repeatedly determined based on the output of touch panel 26. When the determination result is updated from NO to YES, a coordinate registration task is activated in step S3, and a posture information request is issued to the outside through the communication I / F 22 in step S5.

  In step S7, it is determined whether or not attitude information has been acquired through the communication I / F 22, and in step S9, it is determined whether or not a predetermined time has elapsed from the processing of step S5 (whether or not a timeout has occurred). If the decision result in the step S9 is YES, a drawing task is activated in a step S17 so as to select a drawing mode.

  If the determination result in the step S7 is YES, a relative attitude determination process is executed in a step S11, and the flag FLGpen is set to “1” or “0”. The flag FLGpen is set to “1” when the tip of the pen 10 faces the writing surface, and is set to “0” when the rear end of the pen 10 faces the writing surface. In step S13, it is determined whether or not the flag FLGpen indicates “1”. If the determination result is YES, a drawing task is started in step S17 to select the drawing mode. If the determination result is NO, the deletion mode is set. In step S15, a deletion task is activated so as to select.

  When the process of step S15 or S17 is completed, it is repeatedly determined in step S19 whether or not the writing surface has been touched. When the determination result is updated from NO to YES, the active task (excluding the main task) is stopped in step S21, and thereafter, the process returns to step S1.

  The relative posture determination process in step S11 is executed according to a subroutine shown in FIG. In step S31, the direction of the writing surface is detected based on the detection result of the acceleration sensor 32, and in step S33, the direction of the pen tip is detected based on the posture information acquired from the pen 10. In step S35, it is determined whether or not the direction detected in step S31 has an upward component. In step S37, it is determined whether or not the direction detected in step S33 has a downward component. In step S39, step S39 is performed. It is determined whether or not the direction detected in S33 has an upward component.

  If both the determination result in step S35 and the determination result in step S37 are YES, or if the determination result in step S35 is NO and the determination result in step S39 is YES, the tip of the pen 10 faces the writing surface. The process proceeds to step S41.

  On the other hand, if both the determination result of step S35 and the determination result of step S39 are NO, or if the determination result of step S35 is YES and the determination result of step S37 is NO, the pen 10 It is considered that the end faces the writing surface, and the process proceeds to step S43.

  In step S41, the flag FLGpen is set to “1”, and in step S43, the flag FLGpen is set to “0”. When the process of step S41 or S43 is completed, the process returns to the upper hierarchy routine.

  Referring to FIG. 11, in step S51, register 30 is cleared and variable K is set to “0”. In step S53, touch coordinates are detected based on the output of the touch panel 26, and the detected touch coordinates are registered in the Kth column of the register 30. In step S55, the variable K is incremented, and then the process returns to step S53.

  Referring to FIG. 12, in steps S61, variables L and M are set to “0” and “1”. In step S63, the touch coordinates registered in the Lth column of the register 30 are set as the start point coordinates. In step S65, the touch coordinates registered in the Mth column of the register 30 are set as end point coordinates. In step S67, the display device 28 is drawn so that a line connecting the start point coordinates and the end point coordinates set in this way appears on the writing surface. In step S69, the variables L and M are incremented, and when the increment is completed, the process returns to step S63.

  Referring to FIG. 13, in steps S71, variables L and M are set to “0” and “1”. In step S73, the touch coordinates registered in the Lth column of the register 30 are set as the start point coordinates. In step S75, the touch coordinates registered in the Mth column of the register 30 are set as end point coordinates. In step S77, the display device 28 is drawn so that a part of the line appearing on the writing surface is deleted along the handwriting connecting the set start point coordinates and end point coordinates. In step S79, the variables L and M are incremented, and when the increment is completed, the process returns to step S73.

  As can be understood from the above description, the writing surface of the tablet 20 is touched by the pen 10 including the acceleration sensor 12 that repeatedly detects the self posture. The CPU 24p draws the writing surface so that a line appears along the touch position of the pen 10 when the drawing task is activated (S51 to S55, S61 to S69), and appears on the writing surface when the deletion task is activated. The writing surface is drawn so that a part of the line is deleted along the touch position of the pen 10 (S51 to S55, S71 to S79). The CPU 24p also repeatedly detects the posture of the writing surface with reference to the output of the acceleration sensor 32 (S31), and selectively starts a drawing task and a deletion task based on the posture of the pen 10 and the posture of the writing surface ( S33 ~ S43, S13 ~ S17).

  As described above, the drawing task draws a line on the writing surface, while the deletion task deletes a part of the line appearing on the writing surface. The drawing task and the deletion task are selectively activated based on the relative posture between the pen 10 and the writing surface. Thereby, convenience can be improved.

  In this embodiment, a line is drawn on the writing surface when the tip of the pen 10 faces the writing surface, and a line appearing on the writing surface is deleted when the rear end of the pen 10 faces the writing surface. I have to. However, an embodiment in which a black line is drawn on the writing surface when the tip of the pen 10 faces the writing surface, while a red line is drawn on the writing surface when the rear end of the pen 10 faces the writing surface, When the tip of the pen 10 faces the writing surface, a line having a thickness of 3 pt is drawn on the writing surface, while when the rear end of the pen 10 faces the writing surface, a line having a thickness of 5 pt is drawn on the writing surface. In the embodiment, the pencil line is drawn on the writing surface when the tip of the pen 10 faces the writing surface, while the felt pen line is drawn on the writing surface when the rear end of the pen 10 faces the writing surface. Embodiment, an embodiment in which a line of a hard brush is drawn on the writing surface when the tip of the pen 10 faces the writing surface, while a line of a writing brush is drawn on the writing surface when the rear end of the pen 10 faces the writing surface Etc. may be assumed.

  Further, in this embodiment, the processing according to the subroutine shown in FIG. 10 is executed in step S11 shown in FIG. 9, but instead, the processing according to the subroutine shown in FIG. 14 may be executed.

  Referring to FIG. 14, in step S81, the direction of the writing surface is detected based on the detection result of acceleration sensor 32, and the detected direction is set as angle AGLtb. In step S83, the angle obtained by adding 90 ° to the angle AGLtb is set as “AGL1”, and in step S85, the angle obtained by adding 270 ° to the angle AGLtb is set as “AGL2”.

  In both the writing surface and the nib, the right direction corresponds to 0 °, the upward direction corresponds to 90 °, the left direction corresponds to 180 °, and the downward direction corresponds to 270 °. Further, both the angles AGL1 and AGL2 have “360 °” as an upper limit, and when a numerical value exceeding the upper limit is obtained, “360” is subtracted from this numerical value.

  In step S87, the direction of the pen tip is detected based on the posture information acquired from the pen 10, and the detected direction is set as the angle AGLpen. In step S89, it is determined whether or not the angle AGLpen belongs to a range greater than the angle AGL1 and less than the angle AGL2. If the determination result is YES, the flag FLGpen is set to “1” in step S91, and if the determination result is NO, the flag FLGpen is set to “0” in step S93. When the process of step S91 or S93 is completed, the process returns to the upper hierarchy routine.

  Accordingly, as shown in FIG. 15A, when the writing surface angle is 90 ° and the pen tip angle is in the range of 180 ° to 360 °, the tip of the pen 10 faces the writing surface. The operation mode is set to the drawing mode. Further, as shown in FIG. 15B, when the writing surface angle is 90 ° and the pen tip angle is in the range of 0 ° to 180 °, the rear end of the pen 10 faces the writing surface. And the operation mode is set to the delete mode.

  As shown in FIG. 16A, when the writing surface angle is 45 ° and the pen tip angle is in the range of 135 ° to 315 °, the tip of the pen 10 is regarded as facing the writing surface. The operation mode is set to the drawing mode. Further, as shown in FIG. 16B, when the writing surface angle is 45 ° and the pen tip angle is in the range of 315 ° to 135 °, the rear end of the pen 10 faces the writing surface. And the operation mode is set to the delete mode.

  As shown in FIG. 17A, when the writing surface angle is 270 ° and the pen tip angle is in the range of 0 ° to 180 °, the tip of the pen 10 is regarded as facing the writing surface. The operation mode is set to the drawing mode. Further, as shown in FIG. 17B, when the writing surface angle is 270 ° and the pen tip angle is in the range of 180 ° to 0 °, the rear end of the pen 10 faces the writing surface. And the operation mode is set to the delete mode.

  As shown in FIG. 18A, when the writing surface angle is 315 ° and the pen tip angle is in the range of 45 ° to 225 °, the tip of the pen 10 is regarded as facing the writing surface. The operation mode is set to the drawing mode. 18B, when the writing surface angle is 315 ° and the pen tip angle is in the range of 225 ° to 45 °, the rear end of the pen 10 faces the writing surface. And the operation mode is set to the delete mode.

  In the above-described embodiment, in determining the relative posture between the writing surface and the pen tip, only the angle in the direction parallel to the paper surface is referred to, but the angle in the direction orthogonal to the paper surface is additionally referred to. You may make it do.

  Also, in this embodiment, referring to the flag FLGpen indicating a different value depending on the relative posture between the writing surface and the pen tip, one of the drawing task and the deletion task is stopped and the other of the drawing task and the deletion task is started. (See steps S13 to S17 and S21 in FIG. 9). However, it is also possible to always start the drawing task and the deletion task and refer to the value of the flag FLGpen to wake up one of the drawing task and the deletion task and to make the other of the drawing task and the deletion task sleep.

  In this embodiment, the multitask OS and control programs corresponding to a plurality of tasks executed thereby are stored in the ROM 34 in advance. However, a part of the control program may be prepared in the ROM 34 from the beginning as an internal control program, while another part of the control program may be acquired from an external server as an external control program. In this case, the external control program is acquired by the communication I / F 22, and the above-described operation is realized by the cooperation of the internal control program and the external control program.

  Furthermore, in this embodiment, the processing executed by the CPU 24p is divided into a plurality of tasks as described above. However, each task may be further divided into a plurality of small tasks, and a part of the divided plurality of small tasks may be integrated with other tasks. Further, when each task is divided into a plurality of small tasks, all or part of the tasks may be acquired from an external server.

DESCRIPTION OF SYMBOLS 100 ... Handwriting input system 10 ... Pen 12, 32 ... Accelerometer 24p ... CPU
26 ... Touch panel 28 ... Display device 30 ... Register

Claims (11)

A writing input device having a writing surface that is touched by a writing instrument including first detection means for repeatedly detecting a self posture,
A first drawing means for drawing the writing surface in a first manner along the touch position of the writing instrument;
A second drawing means for drawing the writing surface in a second manner along the touch position of the writing instrument;
Second detection means for repeatedly detecting the posture of the writing surface; and the first drawing means and the second drawing based on the attitude detected by the first detection means and the attitude detected by the second detection means. A writing input device comprising control means for selectively switching means.   The writing input device according to claim 1, further comprising a limiting unit that limits a change of the activation target selected by the control unit until the touch of the writing surface is released.   The writing input device according to claim 1, wherein the posture detected by each of the first detection unit and the second detection unit corresponds to a posture with respect to a reference direction. Each of the first detection means and the second detection means includes an acceleration sensor,
The writing input device according to claim 3, wherein the reference direction corresponds to a gravity direction.   The control means includes a first activation means for activating the first drawing means when a tip of the writing instrument is opposed to the writing surface, and a second drawing means when the rear end of the writing instrument is opposed to the writing surface. The writing input device according to any one of claims 1 to 4, further comprising second starting means for starting.   The control means includes first direction detection means for detecting the direction of the tip of the writing instrument, second direction detection means for detecting the direction of the writing surface, and the direction detected by the first direction detection means in the second direction. 2. An activation control means for selectively starting the first drawing means and the second drawing means by determining whether or not the angle is based on a direction detected by the direction detection means. 4. The writing input device according to any one of 4 above.   The writing input device according to claim 1, wherein the process of the second drawing unit corresponds to a process of deleting a part of the handwriting drawn by the first drawing unit. In a processor of a writing input device having a writing surface touched by a writing instrument including first detection means for repeatedly detecting a self posture,
A first drawing step of drawing the writing surface in a first manner along the touch position of the writing instrument;
A second drawing step of drawing the writing surface in a second manner along the touch position of the writing instrument;
A second detection step for repeatedly detecting the posture of the writing surface; and the first drawing step and the second drawing based on the posture detected by the first detection step and the posture detected by the second detection step. A writing control program for executing a control step for selectively switching steps. A writing control method executed by a writing input device having a writing surface touched by a writing instrument including first detection means for repeatedly detecting a self posture,
A first drawing step of drawing the writing surface in a first manner along the touch position of the writing instrument;
A second drawing step of drawing the writing surface in a second manner along the touch position of the writing instrument;
A second detection step for repeatedly detecting the posture of the writing surface; and the first drawing step and the second drawing based on the posture detected by the first detection step and the posture detected by the second detection step. A writing control method comprising a control step of selectively switching steps. An external control program supplied to a writing input device including a writing surface touched by a writing instrument including first detection means for repeatedly detecting a self posture, and a processor for executing processing according to an internal control program stored in a memory. ,
A first drawing step of drawing the writing surface in a first manner along the touch position of the writing instrument;
A second drawing step of drawing the writing surface in a second manner along the touch position of the writing instrument;
A second detection step for repeatedly detecting the posture of the writing surface; and the first drawing step and the second drawing based on the posture detected by the first detection step and the posture detected by the second detection step. An external control program for causing the processor to execute a control step of selectively switching steps in cooperation with the internal control program. A writing surface that is touched by a writing instrument including first detection means for repeatedly detecting a self-posture;
A writing input device comprising: a capturing unit that captures an external control program; and a processor that executes processing according to the external control program captured by the capturing unit and the internal control program stored in a memory,
The external control program is
A first drawing step of drawing the writing surface in a first manner along the touch position of the writing instrument;
A second drawing step of drawing the writing surface in a second manner along the touch position of the writing instrument;
A second detection step for repeatedly detecting the posture of the writing surface; and the first drawing step and the second drawing based on the posture detected by the first detection step and the posture detected by the second detection step. A writing input device corresponding to a program for executing a control step of selectively switching steps in cooperation with the internal control program.

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