JP2013050826A - Handwriting input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handwriting input device capable of omitting a page feeding operation of a user to improve convenience.SOLUTION: According to positional coordinates of an electronic pen obtained at a handwriting input by a user, stroke data representing a trajectory corresponding to one line is generated, mapped with a storage object page and stored. If a crossover is confirmed regarding a stroke (S) currently being obtained and a stroke (N) of a determination object mapped and stored in the storage object page (S101), and it is determined that there is a crossover between stroke data (S103: YES), a page break flag is set as ON (S105) and the storage object page is updated.

Description

  The present invention relates to a handwriting input device that manages information input by a user by handwriting as digital data.

  2. Description of the Related Art Conventionally, a handwriting input system having an electronic pen including a transmitter that transmits infrared rays and ultrasonic waves and a receiving device that receives infrared signals and ultrasonic signals transmitted from the electronic pen is known. In the handwriting input system, an ultrasonic signal and an infrared signal transmitted from the electronic pen are received by the receiving device, and the position coordinates of the electronic pen are measured based on the received signal. Handwriting data is continuously detected based on the measured position coordinates, and characters, figures and the like written with an electronic pen are recognized as handwritten handwriting data.

  As such a handwriting input system, a system that records and recognizes handwriting data and gesture data separately is known (see, for example, Patent Document 1). According to this, the handwriting drawn by the electronic pen is detected from the handwriting data, and the input locus of the gesture using the electronic pen is detected from the gesture data. When the user inputs a gesture using an electronic pen, a command corresponding to the gesture can be input.

JP 2010-128891 A

  In the above handwriting input system, as illustrated in FIG. 19, the user may input a plurality of pages continuously by handwriting. When the handwriting data generated at this time is not managed in units of pages, handwriting data for a plurality of pages is mixed in one page as illustrated in FIG. Therefore, conventionally, when a user switches pages for managing handwriting data, for example, a page feed button provided in advance is pressed or a gesture for instructing page feed is performed. Thus, it is known that a page feed instruction is input to the handwriting input system, and the handwriting data is managed in units of pages.

  However, when switching the page for managing the handwriting data, the user needs to press a page feed button or perform a gesture for instructing page feed in order to input a page feed instruction each time. If it does so, the operation burden of the user who uses a handwriting input system will become large, and it was inconvenient.

  An object of the present invention is to provide a handwriting input device that can improve the convenience by omitting the page turning operation of the user.

  The handwriting input device according to an aspect of the present invention includes a position information acquisition unit that acquires position information indicating a current handwriting input position when the user performs handwriting input, and the position acquired by the position information acquisition unit Based on the information, the stroke data is associated with a stroke generation means for generating stroke data indicating a locus for one line continuously input by the user, and a storage device capable of storing the stroke data in units of pages. A data recording unit that records the stroke data generated by the stroke generation unit in association with a recording target page that is the current page stored in the memory; and a data recording unit that associates the page with the recording target page. Based on the recorded stroke data, the proximity between the stroke data is A proximity determination unit that determines whether or not to close, and a page update unit that updates the recording target page to a new page when the proximity determination unit determines that proximity between the stroke data occurs. .

  According to this, the stroke data indicating the trajectory for one line is generated based on the position information acquired at the time of handwriting input by the user, and is recorded in association with the recording target page. When it is determined that proximity between stroke data occurs based on the stroke data recorded in association with the recording target page, the recording target page is updated. Therefore, the page to be recorded is automatically switched when a character handwritten by the user approaches, so that the user can skip the page turning operation and improve convenience.

1 is a schematic configuration diagram of a handwriting input device 1. FIG. 2 is a block diagram showing an electrical configuration of the electronic pen 10. FIG. 3 is a block diagram showing an electrical configuration of the apparatus main body 20. FIG. 4 is a flowchart of main processing executed by the apparatus main body 20. It is a flowchart of a page break process. It is a flowchart of the flag setting process which concerns on 1st embodiment. It is a figure for demonstrating the preservation | save aspect of handwritten data which concerns on 1st embodiment. It is a figure for demonstrating the preservation | save aspect of handwritten data which concerns on 1st embodiment. It is a flowchart of the flag setting process which concerns on 2nd embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concern on 2nd embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concern on 2nd embodiment. It is a flowchart of the flag setting process which concerns on 3rd embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concern on 3rd embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concern on 3rd embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concern on 3rd embodiment. It is a flowchart of the flag setting process which concerns on 4th embodiment. It is a flowchart of the flag setting process which concerns on 5th embodiment. It is a figure for demonstrating the preservation | save aspect of the handwriting data which concerns on a modification. It is a figure for demonstrating the preservation | save aspect of the conventional handwriting data. It is a figure for demonstrating the preservation | save aspect of the conventional handwriting data.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. These drawings are used to explain technical features that can be adopted by the present invention. The configuration of the apparatus, the flowcharts of various processes, and the like that are described are not intended to be limited to only that, but are merely illustrative examples.

[First embodiment]
A first embodiment of the present invention will be described with reference to FIGS. An outline of the handwriting input device 1 will be described with reference to FIG. The handwriting input device 1 includes an electronic pen 10 used by a user for handwriting input, and a device main body 20 that acquires information (hereinafter referred to as handwriting data) such as characters, symbols, and figures input using the electronic pen 10. Have. The apparatus main body 20 includes a clip member 30 that fixes a sheet on which a user performs handwriting input using the electronic pen 10. The user can freely attach and detach the paper to and from the apparatus main body 20 by an operation for opening and closing the clip member 30 (hereinafter, clip operation). The apparatus main body 20 can communicate with at least the electronic pen 10 that is close to the paper fixed by the clip member 30.

  The apparatus main body 20 is connected to the computer 2 by a cable 3. The handwriting data of the electronic pen 10 acquired by the apparatus main body 20 is transmitted to the computer 2. The computer 2 can display handwriting data on a display, save handwriting data in a storage device, and perform character recognition based on handwriting data.

  The electrical structure of the electronic pen 10 will be described with reference to FIG. The electronic pen 10 includes a control board 11, a pressure sensor 13, an ultrasonic transmitter 14, an infrared transmitter 15, and a battery 19 that supplies power to these. The pressure sensor 13 detects a pressed state of the tip (pen tip) of the electronic pen 10. The ultrasonic transmitter 14 can transmit a sound wave or a signal of 40 kHz to 120 kHz higher than about 20 kHz which is a human audible limit. The infrared transmitter 15 can transmit an electromagnetic wave having a wavelength longer than visible light having a wavelength of about 0.72 μm to 1 mm. On the control board 11, a microcomputer 12 for controlling the pressure sensor 13, the ultrasonic transmitter 14, the infrared transmitter 15 and the like is mounted.

  In the present embodiment, a refill such as a ballpoint pen is inserted into the pen tip of the electronic pen 10, and the pressure sensor 13 detects a pressure on the tip of the refill. When the electronic pen 10 is writing on the paper, the pressure on the refill tip is generated, so that the pressure sensor 13 is turned on. On the other hand, when the electronic pen 10 is not writing on the paper, no pressure is applied to the refill tip, and the pressure sensor 13 is turned off. A detection signal indicating the ON / OFF state of the pressure sensor 13 is output to the control board 11. When the detection signal of the pressure-sensitive sensor 13 output to the control board 11 indicates an ON state, the microcomputer 12 causes the ultrasonic transmitter 14 and the infrared transmitter 15 to transmit an ultrasonic signal and an infrared signal, respectively.

  With reference to FIG. 3, the electrical structure of the apparatus main body 20 will be described. The apparatus body 20 includes a microcomputer 21, ultrasonic receivers 22 and 23, an infrared receiver 24, a memory 27, an external device interface (I / F) 28, and a power supply 29 that supplies power to these. . The microcomputer 21 is integrally provided with a CPU, ROM, RAM, flash memory and the like (not shown). Various counters and page break flags described later are stored in the RAM of the microcomputer 21. The two ultrasonic receivers 22 and 23 are spaced apart from the apparatus main body 20 and receive the ultrasonic signals transmitted from the ultrasonic transmitter 14 respectively. The infrared receiver 24 is disposed at a substantially intermediate position between the ultrasonic receivers 22 and 23 in the apparatus main body 20 and receives the infrared signal transmitted from the infrared transmitter 15. The aforementioned cable 3 is connected to the external device I / F 28.

  The ultrasonic signals received by the ultrasonic receivers 22 and 23 and the infrared signal received by the infrared receiver 24 are output to the microcomputer 21. The microcomputer 21 uses the arrival time difference between the arrival times of the infrared signals first received by the infrared receiver 24 and the arrival times of the ultrasonic signals at the ultrasonic receivers 22 and 23 and the sound speed from the electronic pen 10. The distance to the ultrasonic receivers 22 and 23 is calculated. Then, the position coordinates of the electronic pen 10 are calculated using the theory of the trilateration method, assuming a triangle having apexes at the positions of the electronic pen 10 and the two ultrasonic receivers 22 and 23.

  When one continuous input operation with the electronic pen 10 (that is, an input operation in which the pressure sensor 13 is continuously ON) is performed, the ultrasonic signals are continuously received by the ultrasonic receivers 22 and 23. The At this time, the continuous position coordinate calculated by the microcomputer 21 is stroke data indicating a locus for one line continuously input by the user. The handwriting data described above is composed of a plurality of stroke data.

  The stroke data generated by the microcomputer 21 is stored in the memory 27. The microcomputer 21 stores a current page (hereinafter, a recording target page) set as a stroke data storage area. The microcomputer 21 stores the generated stroke data in the memory 27 in association with the recording target page, whereby the stroke data is managed in the memory 27 in the page unit. Further, the stroke data generated by the microcomputer 21 is transmitted to the computer 2 via the cable 3.

  The main process of the handwriting input device 1 will be described with reference to FIGS. The main process (FIG. 4) is executed by the microcomputer 21 when the apparatus main body 20 is powered on.

  As shown in FIG. 4, in the main process of the handwriting input device 1, first, the counter P indicating the page number of the recording target page is initialized to “1” (S1). Further, a counter S indicating a number assigned to the stroke data in the generation order is initialized to “1” (S3). Next, it is determined whether or not the electronic pen 10 has been handwritten on the paper (that is, whether or not there is pen detection) (S5). Specifically, when an infrared signal is detected by the infrared receiver 24, it is determined that there is pen detection (S5: YES). In this case, the storage area of the page (P) corresponding to the counter P (that is, the storage area of the recording target page) is secured in the memory 27 (S7).

  Based on the infrared signal detected by the infrared receiver 24 and the ultrasonic signals detected by the ultrasonic receivers 22 and 23, the position coordinates indicating the current position of the electronic pen 10 are calculated as described above. (S9). The position coordinates of the electronic pen 10 calculated in step S9 are stored as stroke data corresponding to the counter S (hereinafter referred to as stroke (S)) in the storage area of the page (P) secured in step S7. (S11).

  Thereafter, a page break process described later is executed (S13), and it is determined whether or not the electronic pen 10 is separated from the paper (that is, whether or not the pen is separated) (S15). Specifically, when the ultrasonic detection by the ultrasonic receivers 22 and 23 is continued, it is determined that there is no pen separation (S15: NO). In this case, since one input operation using the electronic pen 10 is continued, the process returns to step S9. Thereby, until the electronic pen 10 leaves | separates from a paper, the position coordinate of the electronic pen 10 is continuously preserve | saved as information which comprises one stroke data.

  On the other hand, when the detection of the ultrasonic waves by the ultrasonic receivers 22 and 23 is interrupted, it is determined that there is a pen separation (S15: YES). In this case, since one input operation using the electronic pen 10 is completed, the counter S is incremented by “1” (S17). Then, it is determined whether or not the handwriting input using the electronic pen 10 is finished (that is, whether or not the pen input is finished) (S19). Specifically, when the apparatus main body 20 is turned off or a reset button (not shown) of the apparatus main body 20 is pressed, it is determined that the pen input is completed (S19: YES), and the main process ends. Is done.

  If it is determined that the pen input has not ended (S19: NO), the process returns to step S5. Thereby, at the next detection of the electronic pen 10, the position coordinates of the electronic pen 10 are stored in the storage area of the page (P) as the latest stroke (S) incremented in step S17 (S7 to S11).

  As shown in FIG. 5, in the page break process (S13), the counter N is first initialized to “1” (S51). The counter N indicates the number of stroke data to be determined among the stroke data stored in the storage area of the page (P). Then, a flag setting process for setting ON / OFF of the page break flag is executed based on whether proximity between stroke data stored in the memory 27 occurs (S53). The page break flag indicates that “ON” indicates that the recording target page is switched, and “OFF” indicates that the recording target page is not switched.

  As shown in FIG. 6, in the flag setting process (S53) of the first embodiment, first, the intersection of the current stroke (S) and the stroke data of the counter N (hereinafter referred to as stroke (N)) It is confirmed based on the position coordinates it has (S101). As a result, when the stroke (S) and the stroke (N) have the same position coordinates, it is determined that there is an intersection between the stroke data (S103: YES), and the page break flag is set to ON (S105). . On the other hand, when the stroke (S) and the stroke (N) do not have the same position coordinates, it is determined that there is no intersection between the stroke data (S103: NO), and the page break flag is set to OFF (S107). . After execution of step S105 or step S107, the process returns to the page break process (FIG. 5).

  Returning to FIG. After execution of step S53, it is determined whether or not the page break flag is “ON” (S55). When the page break flag is “ON” (S55: YES), the stroke (S) stored in the storage area of the page (P) is read from the memory 27 to the RAM of the microcomputer 21 (S57). Thereafter, the stroke (S) stored in the storage area of the page (P) is deleted from the memory 27 (S59). That is, the stroke data currently being acquired is saved from the memory 27 to the microcomputer 21.

  Next, the counter P is incremented by “1” (S61), and the counter S is initialized to “1” (S63). Thereafter, the storage area of the page (P) (that is, the storage area of the next page) is secured in the memory 27 (S65). The stroke data (saved data) saved in steps S57 and S59 is saved in the page (P) saving area secured in step S65 (S67). At this time, since the counter S is “1”, the saved data is saved as the first stroke data in the latest page (P). After execution of step S67, the process returns to the main process (FIG. 4).

  As described above, when the current stroke (S) is close to the determination target stroke (N) already stored in the recording target page, the current stroke (S) is the first stroke data in the storage area of the next page. Saved as Therefore, when proximity occurs between stroke data stored in the same page, the storage area (recording target page) of the stroke data is automatically switched.

  On the other hand, when the page break flag is “OFF” (S55: NO), the counter N is incremented by “1” (S69), and it is determined whether the counter N is equal to or greater than the counter S (S71). When N is less than the counter S (S71: NO), since there is undetermined stroke data in the page (P), the process returns to step S53, and the above flag setting process is executed. Then, the page break flag is set depending on whether or not the current stroke (S) is close to the next stroke (N) to be determined. If the counter N is equal to or greater than the counter S (S71: YES), the process returns to the main process (FIG. 4) because there is no undetermined stroke data in the page (P).

  With reference to FIG. 7 and FIG. 8, the preservation | save aspect of handwriting data in 1st embodiment is demonstrated concretely. For example, as shown in FIG. 7, it is assumed that the user inputs “123” by handwriting on the first sheet fixed by the clip member 30 using the electronic pen 10. In this case, since the intersection between the stroke data does not occur (S103: NO), the storage area is not paged (S55: NO). Therefore, the plurality of stroke data constituting “123” are stored in the storage area of the same page (for example, the storage area of the first page) (S5: YES to S19: NO).

  Thereafter, the user peels off the first sheet fixed by the clip member 30, inputs "OS" by handwriting on the second sheet, and the second "O" becomes "1" on the first sheet. Assume that the drawing positions overlap (see FIG. 7). If no page break is made in the storage area at this time, as illustrated in FIG. 8, a plurality of stroke data describing “OS” is also stored in the storage area of the first page, and a plurality of strokes depicting “123” There is a risk of mixing data without distinction.

  In this regard, in the present embodiment, the stroke data for drawing “O” intersects with the stroke data of “1” (S103: YES), and the page of the storage area is changed (S55: YES to S67). As a result, the stroke data for drawing “O” is stored as the first stroke data in the storage area of the second page. The next stroke data for drawing “S” is stored as the second stroke data in the storage area of the second page.

  As described above, according to the handwriting input device 1 according to the first embodiment, the stroke data indicating the trajectory for one line is generated based on the position coordinates of the electronic pen 10 acquired when the user performs handwriting input. Are recorded in association with the recording target page. When it is determined that proximity between stroke data occurs based on the stroke data recorded in association with the recording target page, the recording target page is updated.

  More specifically, when the stroke data recorded in association with the recording target page has the same position coordinates, it is determined that the intersection of the stroke data occurs, and the recording target page is updated. In other words, the page to be recorded is automatically switched when the user's handwritten character or the like approaches, so that the user can skip the page feed operation and improve convenience, and manage stroke data appropriately in units of pages. Can do. Furthermore, it is possible to easily and accurately determine whether or not proximity between stroke data occurs based on the intersection of stroke data.

[Second Embodiment]
With reference to FIGS. 9-11, 2nd embodiment of this invention is described. The handwriting input device 1 according to the second embodiment is the same as that of the first embodiment, but the details of the flag setting process (S53) are different. Only the points different from the first embodiment will be described below.

  As shown in FIG. 9, in the flag setting process (S53) of the second embodiment, first, the region to which the current stroke (S) belongs is extracted (S201). The affiliation area acquired in step S201 is a stroke (S) among divided areas obtained by dividing a range in which a user's handwriting input can be detected (in other words, a range in which the trajectory of the electronic pen 10 can be detected) into a matrix. Are divided areas. In other words, the region to which the stroke (S) belongs is composed of a combination of divided regions of a prescribed size that includes the stroke (S). Similarly, the divided area including the stroke (N) is extracted as the belonging area of the determination target stroke (N) (S203).

  Next, it is determined whether or not the belonging region of the stroke (S) and the belonging region of the stroke (N) overlap (S205). That is, if each affiliation area extracted in steps S201 and S203 includes the same divided area, it is determined that the affiliation areas overlap (S205: YES), and the page break flag is set to ON (S207). On the other hand, if the belonging areas extracted in steps S201 and S203 do not include the same divided area, it is determined that the belonging areas do not overlap (S205: NO), and the page break flag is set to OFF (S209). . After execution of step S207 or step S209, the process returns to the page break process (FIG. 5).

  The handwriting data storage mode in the second embodiment will be specifically described. For example, as illustrated in FIG. 10, it is assumed that the user inputs “123” by handwriting on the first sheet fixed by the clip member 30 using the electronic pen 10. In this case, there is no duplication of the area to which the stroke data belongs (S205: NO), so no page break is made in the storage area (S55: NO). Therefore, the plurality of stroke data constituting “123” are stored in the storage area of the same page (for example, the storage area of the first page) (S5: YES to S19: NO).

  Thereafter, it is assumed that the user peels off the first sheet fixed by the clip member 30 and inputs “NIL” on the second sheet by handwriting so that the drawing position does not overlap with “123” ( (See FIG. 10). If no page break is made in the storage area at this time, as illustrated in FIG. 11, a plurality of stroke data for drawing “NIL” is also saved in the storage area for the first page, and a plurality of strokes for drawing “123”. There is a risk of mixing data without distinction.

  In this regard, in the present embodiment, as indicated by the thick frame in FIG. 11, the belonging area of the stroke data for drawing “N” overlaps with the belonging area of the stroke data “1” (S205: YES). As a result, a page break is performed in the storage area (S55: YES to S67), and the stroke data describing “N” is stored as the first stroke data in the storage area of the second page. The stroke data for drawing “I” and “L” is stored as the second and third stroke data in the storage area of the second page, respectively.

  As described above, according to the handwriting input device 1 according to the second embodiment, the page to be recorded automatically switches when the user's handwritten character or the like approaches as in the first embodiment. It is possible to improve the convenience by omitting the page turning operation, and to manage the stroke data appropriately in units of pages. More specifically, when the belonging areas of the stroke data recorded in association with the recording target page have the same divided area, it is determined that the intersection of the stroke data occurs, and the recording target page is updated. The Therefore, it is possible to easily and accurately determine whether or not the proximity between the stroke data occurs based on the overlap of the areas including the stroke data.

[Third embodiment]
A third embodiment of the present invention will be described with reference to FIGS. The handwriting input device 1 according to the third embodiment is the same as that of the first embodiment, but the details of the flag setting process (S53) are different. Only the points different from the first embodiment will be described below.

  As shown in FIG. 12, in the flag setting process (S53) of the third embodiment, first, as in steps S101 and S103, an intersection between the stroke (S) and the stroke (N) is confirmed and determined (S301, S303). When it is determined that there is an intersection between the stroke data (S303: YES), the separation distance between the current stroke (S) and the previous stroke (S-1) is calculated based on each position coordinate. (S305).

  Next, it is determined whether or not the separation distance calculated in step S305 is a specified distance (for example, 5 cm) or more (S307). When the calculated separation distance is not less than the specified distance (S307: YES), the page break flag is set to ON (S309). On the other hand, when the calculated separation distance is less than the specified distance (S307: NO), or when it is determined that there is no intersection between the stroke data (S303: NO), the page break flag is set to OFF (S311). . After step S309 or step S311 is executed, the process returns to the page break process (FIG. 5).

  The handwriting data storage mode in the third embodiment will be specifically described. For example, as illustrated in FIG. 13, it is assumed that the user uses the electronic pen 10 to input by hand “when page turning is easily understood” on the first sheet fixed by the clip member 30. In this case, for example, the intersection of the stroke data occurs when “ME” is input (S303: YES), but the separation distance between the intersecting stroke data is “0” (S307: NO), so the page break in the storage area Is not performed (S55: NO). Therefore, a plurality of stroke data constituting “when page turning is easily understood” is stored in the storage area of the same page (for example, the storage area of the first page) (S5: YES to S19: NO).

  Thereafter, it is assumed that the user peels off the first sheet fixed by the clip member 30 and starts handwriting input on the second sheet at a drawing position overlapping with the first “pe” ( (See FIG. 13). If no page break is made in the storage area at this time, as illustrated in FIG. 14, the stroke data of the line input by handwriting on the second sheet is also stored in the storage area of the first page. There is a risk that it will be mixed with stroke data that draws “if you understand it easily”.

  In this regard, in this embodiment, when the stroke data of the line handwritten on the second sheet intersects with the stroke data of “Pe” (S303: YES), the current stroke data and the previous stroke data (that is, 1) Since the separation distance from the “to” stroke data drawn on the sheet is equal to or greater than the specified distance (S307: YES), the storage area is paged (S55: YES to S67). As a result, the current stroke data is stored as the first stroke data in the storage area of the second page.

  In the example shown in FIG. 15, the user uses the electronic pen 10 to input “when page turning is easily understood” on the first sheet fixed by the clip member 30, and “ A strikethrough and “Ne” are entered by handwriting at overlapping drawing positions. In this case, the input strike-through stroke data intersects with the stroke data of “to” (S303: YES), but the separation distance between the intersecting stroke data is “0” (S307: NO), and is saved. The page break of the area is not performed (S55: NO). Therefore, the stroke data constituting the strikethrough and “Ne” are also saved in the same save area (for example, the save area of the first page) as the stroke data “When page turning is easily understood” (S5). : YES to S19: NO).

  As described above, according to the handwriting input device 1 according to the third embodiment, the page to be recorded automatically switches when the user's handwritten input character or the like approaches as in the first embodiment. It is possible to improve the convenience by omitting the page turning operation, and to manage the stroke data appropriately in units of pages. More specifically, the recording target page is updated when the stroke data recorded in association with the recording target page intersects and the separation distance between the current stroke data and the previous stroke data is large. Therefore, it is possible to easily and accurately determine whether or not to perform a page break due to the proximity between the stroke data based on the intersection and the separation distance of the stroke data.

  As a modification of the third embodiment, in the flag setting process (S53) shown in FIG. 12, the processes in steps S301 and S303 may be omitted and only the processes in steps S305 to S311 may be executed. In this case, if the separation distance between the strokes (S) and (S-1) is equal to or greater than the specified distance, the recording target page can be automatically updated regardless of the intersection between the stroke data.

[Fourth embodiment]
A fourth embodiment of the present invention will be described with reference to FIG. The handwriting input device 1 according to the fourth embodiment is the same as that of the first embodiment, but the microcomputer 21 is electrically connected to the clip member 30 and can detect the opening / closing operation of the clip member 30. The microcomputer 21 stores the date and time when the clip member 30 was opened and closed. The details of the flag setting process (S53) according to the fourth embodiment are different from those of the first embodiment. Only the points different from the first embodiment will be described below.

  As shown in FIG. 16, in the flag setting process (S53) of the fourth embodiment, first, as in steps S101 and S103, the intersection of the stroke (S) and the stroke (N) is confirmed and determined (S401, S403). When it is determined that there is an intersection between the stroke data (S403: YES), the opening / closing operation of the clip member 30 performed at the input interval of the stroke (S) and the stroke (N) is specified (S405). Specifically, the opening / closing operation of the clip member 30 performed before the acquisition date / time of the stroke (S) and after the acquisition date / time of the stroke (N) is an opening / closing operation stored in the microcomputer 21. It may be specified based on the date and time.

  As a result, if it is determined that there is an opening / closing operation of the clip member 30 at the input interval of each stroke data (S407: YES), another stroke that intersects the stroke data after the user inputs one stroke data. It can be estimated that the paper fixed to the clip member 30 has been replaced before the data is input. In this case, the page break flag is set to ON (S409), and the recording target page is switched. Thereby, one stroke data and other stroke data are stored in association with different pages.

  On the other hand, when it is determined that there is no opening / closing operation of the clip member 30 at the input interval of each stroke data (S407: NO), other stroke data that intersects the stroke data after the user inputs one stroke data. It can be presumed that the paper fixed to the clip member 30 has not been replaced before the input of. In this case, since the page break flag is set to OFF (S411), one stroke data and other stroke data are stored in association with the same page. If it is determined that there is no intersection between stroke data (S403: NO), the page break flag is set to OFF (S411). After execution of step S409 or step S411, the process returns to the page break process (FIG. 5).

  As described above, according to the handwriting input device 1 according to the fourth embodiment, the page to be recorded is automatically switched when the user's handwritten character or the like approaches as in the first embodiment. It is possible to improve the convenience by omitting the page turning operation, and to manage the stroke data appropriately in units of pages. More specifically, the recording target page is updated when the stroke data recorded in association with the recording target page intersects and the clip member 30 is opened and closed at the input interval of the intersecting stroke data. . Therefore, based on the intersection of the stroke data and the opening / closing operation of the clip member 30, whether or not to perform a page break due to the proximity between the stroke data can be determined easily and accurately.

  As a modification of the fourth embodiment, in the flag setting process (S53) shown in FIG. 16, the processes of steps S401 and S403 may be omitted and only the processes of steps S405 to S411 may be executed. In this case, when the opening / closing operation of the clip member 30 is performed between the strokes (S) and (N), the recording target page can be automatically updated regardless of the intersection between the stroke data.

[Fifth embodiment]
A fifth embodiment of the present invention will be described with reference to FIG. The handwriting input device 1 according to the fifth embodiment is the same as that of the first embodiment, but the details of the flag setting process (S53) are different. Only the points different from the first embodiment will be described below.

  As shown in FIG. 17, in the flag setting process (S53) of the fifth embodiment, first, as in steps S101 and S103, the intersection of the stroke (S) and the stroke (N) is confirmed and determined (S501, S503). When it is determined that there is an intersection between the stroke data (S503: YES), an input time difference between the stroke (S) and the stroke (S-1) is calculated (S505). Specifically, the elapsed time from the input end time of the stroke (S-1) to the input start time of the stroke (S) may be calculated as the input time difference between the stroke (S) and the stroke (S-1). .

  Next, it is determined whether or not the input time difference calculated in step S505 is equal to or longer than a specified time (for example, 10 seconds) (S507). When the calculated input time difference is equal to or longer than the specified time (S507: YES), after the user inputs the previous stroke (S-1) until the current stroke (S) is input, It can be estimated that the paper to which the clip member 30 is fixed has been replaced. In this case, the page break flag is set to ON (S509), and the recording target page is switched. Thus, the current stroke (S) and other stroke data are stored in association with different pages.

  On the other hand, when the calculated input time difference is less than the specified time (S507: NO), the period from when the user inputs the previous stroke (S-1) to when the current stroke (S) is input. In addition, it can be estimated that the paper fixed to the clip member 30 was not replaced. In this case, since the page break flag is set to OFF (S511), the current stroke (S) and other stroke data are stored in association with different pages. Even when it is determined that there is no intersection between strokes (S503: NO), the page break flag is set to OFF (S511). After execution of step S509 or step S511, the process returns to the page break process (FIG. 5).

  As described above, according to the handwriting input device 1 according to the fifth embodiment, the page to be recorded is automatically switched when the user's handwritten character or the like approaches as in the first embodiment. It is possible to improve the convenience by omitting the page turning operation, and to manage the stroke data appropriately in units of pages. More specifically, the recording target page is updated when the stroke data recorded in association with the recording target page intersects and the input time difference between the current stroke and the previous stroke is large. Therefore, based on the intersection of stroke data and the input time difference between the current stroke and the previous stroke, it is possible to easily and accurately determine whether or not to perform a page break due to proximity between stroke data.

  As a modification of the fifth embodiment, in the flag setting process (S53) shown in FIG. 17, the processes in steps S501 and S503 may be omitted and only the processes in steps S505 to S511 may be executed. In this case, if the input time difference between the strokes (S) and (S-1) is equal to or longer than the specified time, the recording target page can be automatically updated regardless of the intersection between the stroke data.

[Others]
In the above embodiment, the microcomputer 21 that executes step S9 corresponds to the “positional information acquisition unit” of the present invention. The microcomputer 21 that executes step S11 corresponds to the “stroke generating means” and the “data recording means” of the present invention. The microcomputer 21 that executes step S53 corresponds to the “proximity determining means” of the present invention. The microcomputer 21 that executes step S13 corresponds to the “page updating unit” of the present invention. The microcomputer 21 that executes steps S201 and S203 corresponds to the “region specifying means” of the present invention. The microcomputer 21 that executes step S307 corresponds to “distance determination means” of the present invention. The clip member 30 corresponds to the “medium holding portion” of the present invention. The microcomputer 21 that executes step S407 corresponds to the “operation determination unit” of the present invention. The microcomputer 21 that executes step S507 corresponds to the “time determination means” of the present invention.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, in the second embodiment, an area composed of a combination of division bodies (divided areas) having a prescribed size that includes stroke data is specified as the belonging area of each stroke (S201, S203). Instead, as illustrated in FIG. 17, an area having an outline connecting positions separated from the stroke data by a predetermined distance may be specified as the belonging area of each stroke. In this case, in step S205, when the belonging area of each stroke includes the same position coordinate, it may be determined that the belonging area is overlapped. According to this, it is possible to set a belonging region having a shape corresponding to the shape of the stroke data, and more accurately specify whether or not each stroke data is close.

  The first to fifth embodiments may be appropriately combined or replaced. For example, in the third and fourth embodiments, whether or not the stroke data is close is specified depending on whether or not the stroke data intersects. Instead of this, as in the second embodiment, whether or not the stroke data is close may be specified depending on whether or not the area to which the stroke data belongs overlaps. Also, by combining the third and fourth embodiments, the page break flag may be set to ON when the stroke data separation distance is equal to or greater than the specified distance and the stroke data input time difference is equal to or greater than the specified time. Good.

DESCRIPTION OF SYMBOLS 1 Handwriting input device 10 Electronic pen 20 Device main body 21 Microcomputer 22, 23 Ultrasonic receiver 24 Infrared receiver 27 Memory 30 Clip member

Claims (8)

Position information acquisition means for acquiring position information indicating a current handwriting input position when handwritten by a user;
Stroke generation means for generating stroke data indicating a trajectory for one line continuously input by a user based on the position information acquired by the position information acquisition means;
The stroke data generated by the stroke generation unit is associated with a recording target page that is the current page in which the stroke data is stored in association with a storage device capable of storing the stroke data in units of pages. Data recording means for recording;
Proximity determination means for determining whether or not proximity between the stroke data occurs based on the stroke data recorded in association with the recording target page by the data recording means;
A handwriting input device comprising: a page update unit that updates the recording target page to a new page when the proximity determination unit determines that the proximity between the stroke data occurs.   The proximity determination unit determines that proximity between the stroke data occurs when the stroke data recorded in association with the recording target page has the same position information. Item 2. The handwriting input device according to Item 1. For each of the stroke data to be recorded in association with the recording target page, the region specifying means for specifying an area including the stroke data,
The proximity determination means determines that proximity between the stroke data occurs when the areas specified by the area specifying means include the same areas. Handwriting input device.   The handwriting input device according to claim 3, wherein the region specifying unit specifies the region having a contour connecting positions separated from the stroke data by a predetermined distance.   The handwriting input device according to claim 3, wherein the region specifying unit specifies the region including a combination of partition bodies having a predetermined size that includes the stroke data. It is determined whether or not a separation distance between the latest stroke data generated by the stroke generation unit and the previous stroke data generated immediately before the latest stroke data is equal to or greater than a specified distance. A distance determination means for
The page updating means determines that the proximity between the stroke data is determined by the proximity determination means, and the recording target is determined when the distance determination means determines that the separation distance is equal to or greater than the specified distance. 6. The handwriting input device according to claim 1, wherein the page is updated to a new page. A medium holding unit for holding a medium arranged in an area handwritten by a user;
An operation determining unit that determines whether or not a user operation for switching the medium held in the medium holding unit is detected at an interval of generation of the stroke data recorded in association with the recording target page. ,
The page updating unit determines the page to be recorded when it is determined that the proximity between the stroke data is generated by the proximity determining unit, and the operation for switching the medium is detected by the operation determining unit. The handwriting input device according to claim 1, wherein the handwriting input device is updated to a new page. It is determined whether or not a difference in generation time between the latest stroke data generated by the stroke generation means and the previous stroke data generated immediately before the latest stroke data is equal to or greater than a specified time. And a time determination means for
The page update unit determines that the proximity between the stroke data is generated by the proximity determination unit, and the recording target when the time determination unit determines that the generation time difference is equal to or greater than the specified time. 8. The handwriting input apparatus according to claim 1, wherein the page is updated to a new page.

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