JP2015146090A - Handwritten input device and input control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly recognize handwritten information when a hand with a pen is placed on an input panel for handwritten input, without complicating the configuration of the input panel, to quickly reflect it in display.SOLUTION: A handwritten input device having an input panel for detecting contact or pressure of an object includes: an input determination section for identifying an area which is touched or pressed by the object, on the basis of position information detected by the input panel, and determining predetermined input having an area of a predetermined threshold or larger and/or a shape belonging to a predetermined pattern; and an area setting section which sets an input area for receiving handwritten input on the input panel, on the basis of the position information when the predetermined input is determined.

Description

  The present invention relates to a handwriting input device and an input control program for controlling handwriting input.

  In recent years, a handwriting input device having a function of storing or outputting information such as handwritten characters and figures (hereinafter referred to as handwritten information) as electronic data has been sold. This handwriting input device includes an input panel (including a touch panel with a display unit) that operates by a resistive film method, an electromagnetic induction method, a capacitance method, etc., and is fixed on the input panel (or fixed to the input panel). When handwritten information is input on the paper) with an input means such as a pen or a finger, the input panel detects the pressing or contact of the input means, and the movement locus of the detected position can be stored as handwritten information. At that time, when an object other than the input means (for example, a hand with a pen) presses the input panel or contacts the input panel during handwriting input, the pressed or touched point may be recognized as handwritten information. . Therefore, various methods for preventing such erroneous recognition have been proposed.

  For example, Japanese Patent Application Laid-Open No. H10-228688 senses stylus input and non-stylus input to a touch-sensitive surface, and responds to the stylus input to the touch-sensitive surface in an input method in the computer having the surface that distinguishes the input. Performing a function in response to the non-stylus input to the touch-sensitive surface only if a stylus is not detected to be in proximity to the touch-sensitive surface. An input method is disclosed.

  Further, in Patent Document 2 below, a sensor for detecting a palm is provided, and when the sensor detects a palm, the processing to be executed is switched (when the palm is attached, the character input mode is set, and the palm is not attached. Is a finger scroll mode). Patent Document 3 below discloses a technique for improving the recognition accuracy of a cloud point or the like by selecting an area where character determination is integrated based on information such as a small character size and a small stroke close to information.

JP 2006-146936 A JP 2007-233649 A JP 07-262314 A

  The technique of the above-mentioned patent document 1 uses a sensing part including a stylus sensitive part such as an electromagnetic digitizer and a non-stylus sensitive part such as a capacitive touch pad, and the technique of patent document 2 detects pressing. In addition to the sensor for detecting the palm, a sensor for detecting the palm is provided. Thus, by providing a plurality of detection means, a point where an object different from the original input means is accidentally pressed or touched is erroneously written as handwritten information. It can suppress that it is recognized. However, providing a plurality of detection means complicates the configuration and control of the handwriting input device, leading to an increase in price and a decrease in processing speed.

  In addition, as another method for suppressing erroneous recognition, there are methods of increasing the detection time for determining the input means or increasing the number of detections (shortening the detection interval). For example, by increasing the detection time by increasing the detection time, a point where an object different from the original input means is accidentally pressed or contacted can be determined as noise. Further, by determining the relevance of the position where pressing or contact is detected by increasing the number of detections (shortening the detection interval), a point with low relevance can be determined as noise. However, if the detection time is lengthened or the number of detections is increased, processing takes time, and a time lag occurs before handwritten information is reflected on the display. Similarly, when the recognition accuracy is improved using the technique of Patent Document 3, a time lag occurs until the handwritten input information is reflected on the display. This time lag is not so much of a problem when writing large characters and figures, but it becomes a concern when writing small characters and figures, and the operability is significantly reduced.

  The present invention has been made in view of the above-described problems, and its main purpose is to perform handwriting when inputting a hand with a pen placed on the input panel without complicating the configuration of the input panel. An object of the present invention is to provide a handwriting input device and an input control program capable of appropriately recognizing information and quickly reflecting the information on the display.

  One aspect of the present invention is a handwriting input device including an input panel that detects contact or press of an object, and specifies a region where the object has touched or pressed based on position information detected by the input panel, An input determination unit that determines whether or not a predetermined input in which the area of the region is equal to or larger than a predetermined threshold and / or the shape of the region belongs to a predetermined pattern, and determination that the predetermined input has been performed And an area setting unit that sets an input area for accepting handwritten input on the input panel based on the position information.

  One aspect of the present invention is an input control program that operates on a device that controls an input panel that detects contact or pressing of an object, and the device touches the device based on position information detected by the input panel. Or a first step of identifying a pressed area and determining whether a predetermined input has been performed, wherein the area of the area is equal to or greater than a predetermined threshold and / or the shape of the area belongs to a predetermined pattern; When it is determined that a predetermined input has been performed, a second step of setting an input area for accepting handwritten input on the input panel is executed based on the position information.

  According to the handwriting input device and the input control program of the present invention, without complicating the configuration of the input panel, it is possible to appropriately recognize and quickly recognize handwritten information when a hand holding a pen is placed on the input panel and handwritten input is performed. Can be reflected in the display.

  The reason for this is that the area of the area where the object presses the input panel or contacts the input panel is greater than or equal to a predetermined threshold and / or the shape of the area where the object presses the input panel or contacts the input panel. Monitors a predetermined input belonging to a predetermined pattern, and when the predetermined input is detected, the input mode of the handwriting input device is set to the first input mode. In the first input mode, the position of the position where the predetermined input is detected is set. This is because an input area is set in the vicinity, and only pen input in the input area is controlled as handwritten information.

It is a figure explaining the problem of the conventional input control method. It is a figure explaining the problem of the conventional input control method. It is a figure which shows the external appearance structure of the handwriting input device which concerns on one Example of this invention. It is a block diagram which shows the structure of the handwriting input device which concerns on one Example of this invention. It is a flowchart figure which shows the process of the handwriting input device which concerns on one Example of this invention. It is a figure which shows typically the handwritten input state in the handwriting input device which concerns on one Example of this invention. It is a figure which shows an example of the detection information at the time of handwriting input typically. It is a figure which shows typically an example of the input area | region and input control method which are set by the handwriting input device which concerns on one Example of this invention. It is a figure which shows typically the other example of the shape detected by the hand with a pen. It is a figure which shows typically the other example of the input area set by the handwriting input device which concerns on one Example of this invention. It is a figure which shows typically the other example of the input control method which concerns on one Example of this invention.

  As shown in the background art, in the handwriting input device, the input panel detects the press or contact of the input means such as a pen or a hand, and acquires the movement locus of the detection position as handwritten information. On the other hand, when an object presses the input panel or contacts the input panel, the pressed or touched point is also recognized as handwritten information, and handwritten information as intended by the user may not be acquired.

  For this problem, there is a method for providing a plurality of detection means in the handwriting input device so that the pen and the hand can be identified. However, if a plurality of detection means are provided, the configuration and control of the handwriting input device become complicated, and the price Cause increase in processing speed and decrease in processing speed. In addition, there is a method of increasing the detection time for determining the input means or increasing the number of detections (shortening the detection interval), but if the detection time becomes long or the number of detections increases, the processing takes time. There is a time lag before the handwritten information is reflected in the display. And this time lag is worrisome when writing small characters and figures, and the operability is significantly reduced.

  For example, as in the electronic blackboard shown in FIG. 1A, when a handwritten area is wide and a large character or figure is input by hand over a wide area, the distance of one stroke is long, and one character or figure Since it takes a long time to draw the information, even if it takes some time before the information input by handwriting is reflected in the display due to a delay in response, it does not matter much. Therefore, in such a device with a wide handwriting area, it is possible to increase the recognition accuracy by extending the detection time or increasing the number of detections (shortening the detection interval), and an object different from the original input means A point touched or pressed by (for example, the finger in FIG. 1A) can be recognized as noise. As a result, as shown in FIG. 1B, it is possible to acquire the character or figure (here, “Aiue” character) input by the original input means (here, pen) as detection information.

  On the other hand, as in the tablet terminal shown in FIG. 2A, when the handwritten area is narrow and small characters or figures are input by handwriting in a narrow area, the distance of one stroke is short, and one character or figure Since it takes a short time to draw information, it may be a concern if it takes time until the information input by handwriting is reflected in the display. Therefore, in such an apparatus, it is impossible to lengthen the detection time or increase the number of detections (shorten the detection interval), and an object different from the original input means (for example, the palm of FIG. 2A). Or a point touched or pressed by a finger or the like cannot be recognized as noise. In addition, small letters and figures are often drawn with a hand on the input panel to draw accurately (the same is true when small letters and figures are handwritten on a device with a wide handwriting area). There is a high possibility that the touched point is determined as input information. As a result, as shown in FIG. 2B, the point touched or pressed by the palm or finger is not recognized as input information, and characters and figures (here, pens) input by the original input means (here, pen) In this case, it is not possible to acquire “Aiue” as detection information.

  In this way, depending on the size of information such as characters and figures to be handwritten input, the state of handwriting input and the performance required of the handwriting input device differ, so any size information can be input by handwriting. However, there is a demand for the construction of a system that can acquire characters and figures input by the original input means as detection information.

  Therefore, in one embodiment of the present invention, the area for accepting input as handwritten information is changed between writing a relatively small character or graphic and writing a relatively large character or graphic. . For example, since relatively small characters and figures are considered to be written by placing a hand on the input panel, the area of the area where the object presses the input panel or contacts the input panel is equal to or greater than a predetermined threshold, and / or Or, when a predetermined input is performed in which the shape of the area where the object presses the input panel or contacts the input panel belongs to a predetermined pattern, it is determined that the hand holding the pen is placed on the input panel. The input mode of the handwriting input device is set to the first input mode for writing relatively small characters and figures. In the first input mode, an input area for accepting input as handwritten information is set based on the position where the input panel detects a press or contact (for example, in the vicinity of the detected position), and the pen of the input area is set. Only input is acquired as handwritten information.

  Thus, it is not necessary to provide a plurality of detection means by detecting that the hand holding the pen is placed on the input panel based on the area and pattern. In addition, by setting an input area that accepts input as handwritten information, there is no need to lengthen the detection time or increase the number of detections (shorten the detection interval), appropriately recognize the handwritten information, and It can be reflected in the display quickly.

  In order to describe the above-described embodiment of the present invention in more detail, a handwriting input device and an input control program according to an embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a diagram illustrating an external configuration of the handwriting input device according to the present embodiment, and FIG. 4 is a block diagram illustrating a configuration of the handwriting input device. FIG. 5 is a flowchart showing the processing of the handwriting input device of this embodiment, and FIGS. 6 to 11 are diagrams for explaining the input control method of this embodiment.

  As shown in FIG. 3, the handwriting input device 10 of this embodiment is a tablet terminal, a smartphone, a portable computer device, or the like, and includes a touch panel 14 that operates in a resistive film method, an electromagnetic induction method, a capacitance method, or the like. I have. When handwriting is input from the touch panel 14 using an input means such as a pen, the touch panel 14 detects contact or pressing of the input means, and displays handwritten information (movement locus of the contact or pressing position) or electronic data. Or output. The electronic data is stored in an internal storage unit of the handwriting input device 10 or an external server, or transferred to an external computer device and displayed.

  In this embodiment, the input panel that is pressed by the input means is also referred to as the touch panel 14 for convenience. Further, in this embodiment, the input unit directly touches or touches the touch panel 14, but the input unit may be pressed from the paper placed on the touch panel 14 using the input unit. Good. Moreover, although the handwriting input device 10 of a present Example shall have a display part, it is good also as an apparatus like a pen tablet which does not have a display part. In this embodiment, the handwriting input device 10 is a device having a relatively small handwriting area such as a tablet terminal. However, even in a device having a relatively large handwriting area such as an electronic blackboard, When drawing a figure, the input control method of the present embodiment can be similarly applied.

  As shown in FIG. 4A, the handwriting input device 10 includes a control unit 11, a communication I / F unit 12, a display unit 13, a touch panel 14, and the like.

  The control unit 11 includes a CPU (Central Processing Unit) 11a, a ROM (Read Only Memory) 11b, a RAM (Random Access Memory) 11c, a HDD (Hard Disk Drive), an SSD (Solid State Drive), an SD (SD) The CPU 11a performs overall control of the handwriting input device 10 by developing the program stored in the ROM 11b or the storage unit 11d in the RAM 11c and executing the program. The ROM 11b stores a program executed by the CPU 11a. The RAM 11c stores the calculation processing result of the CPU 11a. The RAM 11 c also functions as an input buffer that stores handwritten information input by handwriting on the touch panel 14. The storage unit 11d is a program executed by the CPU 11a, electronic data (display data) of handwritten information, an area threshold value or a detection pattern serving as a reference for determining whether or not a hand holding a pen is placed on the touch panel 14, The pressure and area threshold values used as a reference for determining whether or not the input is a pen input, the speed range for determining whether or not the pen input is appropriate, and the like are stored.

  Based on the information detected by the touch panel 14, the control unit 11 sets the input mode of the handwriting input device 10 to a relatively small character or figure (a size that can be drawn with the hand placed on the touch panel 14 as a support). Switching between the first input mode for inputting characters and figures) and the second input mode for inputting relatively large letters and figures (sizes of characters and figures drawn without placing a hand on the touch panel 14) Control is performed according to the set input mode.

  Specifically, the control unit 11 functions as an input determination unit 15 and a region setting unit 16 as shown in FIG.

  The input determination unit 15 identifies the shape of the area detected by the touch panel 14 based on the information detected by the touch panel 14 and determines whether or not the area is equal to or greater than a predetermined threshold (if necessary, the detected area Whether the hand holding the pen is placed on the touch panel 14 based on whether the shape of the area detected by the touch panel 14 belongs to the predetermined pattern or not. The determination is made, and the determination result is notified to the area setting unit 16. In this embodiment, belonging to a pattern not only matches the shape of the detected area with a predetermined pattern, but also has a similar pattern or a pattern configuration (partial shape, arrangement, etc. ) Is also included.

  In addition, when the input region is set by the region setting unit 16 (that is, when the input mode is set to the first input mode), the input determination unit 15 is based on the position or pressure detected by the touch panel 14. The pen input in the input area is determined, and the movement locus of the position designated by the pen input is accepted as handwritten information and stored in the storage unit 11d or displayed on the display unit 13. Further, the input determination unit 15 validates / invalidates the pen input based on the position and time detected by the touch panel 14 when the input mode is set to the second input mode by the region setting unit 16 as necessary. The movement locus of the position designated by the valid pen input is received as handwritten information, and is stored in the storage unit 11d or displayed on the display unit 13.

  When the input determination unit 15 determines that the hand holding the pen is placed on the touch panel 14, the region setting unit 16 inputs handwritten information such as a relatively small character or figure as the input mode of the handwriting input device 10. To the first input mode. In the first input mode, based on the position of the area detected by the touch panel 14, an input area for accepting handwriting input is set in the vicinity of the area within the detection area of the touch panel 14, and areas other than the input area are set as non-input areas ( Set to the erroneous input prevention area. If necessary, the input area frame is displayed on the display unit 13 or the display form (color, brightness, etc.) of the input area is changed so that the user can identify the set input area. To do.

  The input determination unit 15 and the region setting unit 16 may be configured as hardware, or may be configured as a program (input control program) that causes the control unit 11 to function as the input determination unit 15 and the region setting unit 16. The input control program may be executed by the CPU 11a.

  The communication I / F unit 12 is a NIC (Network Interface Card), a modem, etc., such as Ethernet (registered trademark), NFC (Near Field Communication), Bluetooth (registered trademark), TransferJet (registered trademark), IEEE802.11, etc. According to the standard, communication with a server that stores electronic data of handwritten information, a computer device that displays handwritten information, or the like is possible by wire or wireless.

  The display unit 13 is, for example, an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display device, or the like, and is acquired from handwritten information input on the touch panel 14 or stored in the storage unit 11d or from an external server. Display documents. Further, as necessary, in order to allow the user to identify the input area set by the area setting unit 16, a frame or the like is displayed, or the display form (color, brightness, etc.) of the input area is changed. . In addition, when displaying handwritten information on an external computer apparatus etc., the display part 13 can also be abbreviate | omitted.

  The touch panel 14 is an input panel that operates by a digital resistance film type in which electrodes are arranged in a grid pattern on the display unit 13, an electromagnetic induction method, a capacitance type, an infrared optical imaging method, an ultrasonic method, and the like. The controller 11 detects detection information such as position information, time information, and pressure information by detecting pressure, contact, and electric charge with a finger or the like. The touch panel 14 may adopt any method as long as it can detect at least the coordinates and time of a plurality of detection positions, and does not need to use a plurality of methods together.

  FIG. 4 is an example of the handwriting input device 10 of the present embodiment, and the configuration thereof can be changed as appropriate. For example, in this embodiment, the communication I / F unit 12 is provided to communicate with an external server or computer device. However, when the handwriting input device 10 is operated alone, the communication I / F unit 12 is provided. Can be omitted. In this embodiment, the control unit 11 of the handwriting input device 10 is provided with functions as the input determination unit 15 and the region setting unit 16, but the handwriting input device 10 is connected to an external computer device wired or wirelessly. It is good also as a structure which gives a function as the input determination part 15 and the area | region setting part 16 (a control part of an external computer apparatus performs an input control program).

  Hereinafter, the process of the handwriting input device 10 having the above configuration will be described. The CPU 11a executes the process of each step shown in the flowchart of FIG. 5 by developing and executing the input control program stored in the ROM 11b and the storage unit 11d in the RAM 11c. In the following description, an area threshold value or a detection pattern that is a reference for determining whether or not a hand holding a pen is placed on the touch panel 14, or a pressure that is a reference for determining whether or not the input is a pen. The threshold value of the area, the speed range for determining whether or not the pen input is appropriate, and the like are set in advance and stored in the storage unit 11d or the like.

  First, the touch panel 14 of the handwriting input device 10 monitors the pressing and contact (hereinafter referred to as touch) of input means such as a pen, hand, and finger (hereinafter referred to as touch) (S101). 15 acquires detection information (position information, time information, pressure information, etc. of the detected area) from the touch panel 14 (S102). Then, the input determination unit 15 determines whether the touch is a hand touch with a pen based on the acquired detection information (S103). Although details will be described later, for example, a touched area is identified based on position information detected by the touch panel 14, and the area of the area is equal to or greater than a predetermined threshold (the pressure of the detected area is determined in advance as necessary). If the detected area shape belongs to a predetermined pattern, it is determined that the touch is a hand with a pen. Further, if necessary, it is determined whether the touch is a right hand touch or a left hand touch based on the shape of the detected region.

  When the input determination unit 15 determines that the hand is touching with a pen (Yes in S103), the region setting unit 16 changes the input mode of the handwriting input device 10 to a relatively small character or figure. The input area is set based on the detection information (position information of the detected area) while being set to the one input mode (S104). Although details of this input area will be described later, for example, when the hand holding the pen is determined to be the right hand, a predetermined range area near the left side of the detected area (the pen reaches when the right hand is placed on the touch panel 14). (Range) is set as the input area. If it is determined that the hand holding the pen is the left hand, an area in a predetermined range near the right side of the detected area (similarly, the area where the pen reaches when the left hand is placed on the touch panel 14) is set as the input area. . When the handwriting input device 10 includes the display unit 13, the input region frame is displayed on the display unit 13 or the input region is displayed so that the user can identify the set input region. (Color, brightness, etc.) may be changed.

  Thereafter, the touch panel 14 monitors the touch of an input unit such as a pen, hand, or finger (S105). When the touch panel 14 detects the touch, the input determination unit 15 detects the detection information (position information of the detected area) from the touch panel 14. , Pressure information) is acquired (S106). Then, the input determination unit 15 determines whether the detected touch is a pen touch based on the area of the area obtained from the detection information (pressure information of the detected area) and the position information of the detected area (S107). ). Specifically, if the pressure of the detected region is equal to or greater than a predetermined threshold value, or the area of the detected region is equal to or less than the predetermined threshold value, it is determined that the touch is a pen.

  If it is determined that the touch is a pen touch, the input determination unit 15 determines whether the touch is in the input area based on the acquired detection information (position information of the detected area) (S108). If it is determined that the touch is within, the detected position information is accepted as handwritten information of the pen and stored in the storage unit 11d or displayed on the display unit 13 (S109). On the other hand, if it is determined in S107 that the touch is not a pen touch (for example, a finger touch), and if it is determined in S108 that the touch is outside the input area, it is considered that the handwriting input is not valid. Therefore, a series of processing is terminated.

  In S103, when the input determination unit 15 determines that the hand is touching with a pen (No in S103), the region setting unit 16 sets the input mode of the handwriting input device 10 as the second input without setting the input region. In the mode, the input determination unit 15 determines that the detected touch is a pen touch based on the area of the area obtained from the detection information (pressure information of the detected area) acquired in S102 and the position information of the detected area. It is determined whether there is (S110). Specifically, as described above, if the pressure of the detected area is equal to or greater than a predetermined threshold value, or the area of the detected area is equal to or less than the predetermined threshold value, it is determined that the touch of the pen. To do.

  If it is determined that the touch is a touch of the pen, the movement trajectory may be set as it is as the handwritten information of the pen. However, if the hand holding the pen is not fixed, the pen may accidentally touch the touch panel 14, May be put on the touch panel 14 while being stopped. Therefore, the input determination unit 15 moves the detection position within a predetermined speed range (or a predetermined distance range) based on the detection information (position information of the detected area, time information) acquired in S102 as necessary. If the detected position is moving within a predetermined speed range (or a predetermined distance range), the detected position information is received as pen handwritten information and stored in the storage unit 11d. Or displayed on the display unit 13 (S112). On the other hand, if it is determined in S110 that it is not a pen touch (for example, a finger touch), and it is determined in S111 that the detection position has not moved within a predetermined speed range (or a predetermined distance range). In this case, since it is considered that the handwriting input is not valid, the series of processes is terminated.

  As described above, it is determined whether or not the hand holding the pen is placed on the touch panel 14 based on the area and shape of the detected area. When it is determined that the hand holding the pen is placed on the touch panel 14, By setting an input area in the vicinity of the hand holding and validating only the pen input of the input area, handwritten information as intended by the user can be acquired. In addition, when it is determined that the hand holding the pen is not placed on the touch panel 14, only the pen input moving in the predetermined speed range (or the predetermined distance range) is validated, so that the user intends The handwritten information as it is done can be acquired.

  Hereinafter, the input control will be described with a specific example.

  FIG. 6 shows a state in which relatively small characters and figures are input by handwriting on the touch panel 14. When inputting relatively small characters and figures by handwriting, first, an operation of fixing the hand holding the pen on the touch panel 14 is performed. Further, if necessary, an operation of fixing the handwriting input device 10 with a hand opposite to the hand holding the pen (referred to as an accessory in this embodiment) is performed.

  At this time, as shown in FIG. 7, the touch panel 14 detects the position touched by the pen and the position touched by the hand holding the pen (here, the right palm side and the right hand little finger). Moreover, the position where the hand (here, the left thumb) that fixes the handwriting input device 10 touches may be detected. Therefore, as shown in FIG. 2B, the position touched by the hand or finger is recognized as handwritten information, and only the movement locus of the position touched by the pen may not be correctly recognized as handwritten information.

  Therefore, in this embodiment, a touch with an area equal to or larger than a predetermined threshold (for example, an area larger than the area when one finger touches), or a predetermined pattern (for example, one or a plurality of predetermined sizes). When the touch of the shape belonging to the ellipse or circle of the image is detected, the input mode is set to the first input mode for inputting a relatively small character or figure, and as shown in FIG. The area within which the pen reaches when the hand is held is set as the input area 14a, and the area other than the input area 14a is set as the non-input area (incorrect input prevention area) 14b. Then, input by a pen in the set input area is set as valid detection information, and input by an input means (hand or finger) other than the pen in the input area or input by a pen, hand, or finger outside the input area is invalid. As detection information, valid detection information is accepted as handwritten information.

  7 and 8, when two ellipses corresponding to the right palm side with the pen and the right hand little finger and the area thereof are detected, it is determined that the hand holding the pen has touched. Since the shape and area to be changed vary depending on how the user holds the pen and how to write by hand, the threshold value of the pattern or area that is a criterion for determining whether or not the hand is holding the pen can be changed as appropriate.

  For example, as shown in FIG. 9A, when a shape or area corresponding to the right palm side portion and a plurality of fingers (here, the little finger and the ring finger) is detected, it is determined that the hand holding the pen has touched Alternatively, as shown in FIG. 9B, when a shape or area corresponding to the right palm side is detected, it may be determined that the hand holding the pen has touched. In addition, since there is a case where the palm base or wrist is handwritten on the touch panel 14, as shown in FIG. 9C, when a shape or area corresponding to the palm base or wrist is detected, a pen is held. It may be determined that the hand has touched. In addition, since the entire side of the right hand may be handwritten on the touch panel 14, it is determined that the hand holding the pen has touched when the shape or area shown in FIG. 9D is detected. Also good. Further, in consideration of a user having a pen in the left hand, as shown in FIG. 9E, a pattern obtained by inverting the patterns of FIGS. 8 and 9A to 9D symmetrically (here, FIG. 8). When a pattern obtained by reversing the pattern is detected, it may be determined that the hand holding the pen has touched.

  In FIG. 8, the input area 14a is rectangular. However, the range within which the pen can reach varies depending on how the user holds the pen and the length of the pen. Therefore, the position, size, and shape of the input area 14a are appropriately set. It can be changed. For example, an elliptical area near the detected position may be set as the input area 14a as shown in FIG. 10A, or an area surrounded by straight lines and arcs as shown in FIG. 10B. It may be set as the input area 14a. In addition, when handwriting is performed with the base of the palm or the wrist placed on the touch panel 14, the range that the pen can reach is considered to extend above the detected position. Therefore, an area as shown in FIG. 10C is used as the input area 14a. It may be set. Further, in consideration of a user having a pen in the left hand, as shown in FIG. 10D, a pattern obtained by inverting the patterns of FIGS. 8 and 10A to 10C symmetrically (here, FIG. 8). A pattern obtained by inverting the above pattern) may be set as the input area 14a.

  In addition, in the second input mode in which relatively large characters and figures are input, the pen tip cannot be accurately controlled because the characters and figures are input without fixing the hand. A case where the touch panel 14 is touched or a case where the pen tip is held while touching the touch panel 14 may be considered. Therefore, when the second input mode is set (not set to the first input mode), even when it is determined that the input is performed by the pen, the detection position may change greatly in a short time or may be determined in advance. If the movement does not occur during the predetermined number of detections, it may be determined that the input is not pen input.

  For example, as shown in FIG. 11, when the moving speed of the detection position is within a predetermined speed range or the distance between the detection positions is a predetermined distance range, it is determined that the input is a pen, and the pen is erroneously applied to the touch panel 14. When it touches and moves quickly, since the moving speed of a detection position exceeds the predetermined speed range, or the distance between detection positions exceeds a predetermined distance range, it can be judged as noise. In addition, when the pen tip is held in contact with the touch panel 14 and the substantially same point is detected for a certain time, the moving speed of the detection position is equal to or less than a predetermined speed range, or the distance between the detection positions. Is less than or equal to a predetermined distance range, and can be determined as noise.

  The present invention is not limited to the above embodiment, and the configuration and input control method of the handwriting input device 10 can be changed as appropriate without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the area and / or shape of the detected region is used as information for determining whether or not the hand holding the pen touches the touch panel 14. The pressure at the detection position can also be used.

  The present invention can be used for a handwriting input device including a touch panel capable of handwriting input, an input control program operating on the handwriting input device, and a recording medium on which the input control program is recorded.

10 handwriting input device 11 control unit 11a CPU
11b ROM
11c RAM
11d Storage unit 12 Communication I / F unit 13 Display unit 14 Touch panel 14a Input area 14b Non-input area (incorrect input prevention area)
15 Input determination unit 16 Area setting unit

Claims (12)

A handwriting input device comprising an input panel for detecting contact or pressing of an object,
Based on the position information detected by the input panel, the region where the object touches or presses is specified, the area of the region is equal to or greater than a predetermined threshold, and / or the shape of the region belongs to a predetermined pattern, An input determination unit for determining whether a predetermined input has been performed;
An area setting unit that sets an input area for accepting handwritten input on the input panel based on the position information when it is determined that the predetermined input has been performed;
A handwriting input device characterized by that. The region setting unit sets the input region in the vicinity of a region where the object has contacted or pressed.
The handwriting input device according to claim 1. The input determination unit determines whether the predetermined input is a right hand input or a left hand input based on the identified shape of the region,
When it is determined that the input is performed by the right hand, the region setting unit sets a predetermined range on the left side of the region touched or pressed by the object as the input region, and is determined to be the input by the left hand In this case, a predetermined range on the right side of the area touched or pressed by the object is set as the input area.
The handwriting input device according to claim 2. The predetermined area is a range where a pen held in the right hand or the left hand can reach,
The handwriting input device according to claim 3. The input determination unit determines whether the input is a handwritten input in the input area based on position information detected by the input panel when detecting contact or pressing of an object after the input area is set. And determining whether the object is a pen based on the pressure information detected by the input panel and / or the area of the area specified by the position information detected by the input panel. The pressure information detected by the input panel is received as handwritten information when the object is a pen.
The handwriting input device according to claim 1, wherein the handwriting input device is a handwriting input device. The input panel includes a display unit,
The area setting unit displays the input area in an identifiable manner on the display unit.
The handwriting input device according to any one of claims 1 to 5, wherein An input control program that operates on a device that controls an input panel that detects contact or pressing of an object,
In the device,
Based on the position information detected by the input panel, the region where the object touches or presses is specified, the area of the region is equal to or greater than a predetermined threshold, and / or the shape of the region belongs to a predetermined pattern, A first step of determining whether a predetermined input has been made;
When it is determined that the predetermined input has been performed, a second step of setting an input area for accepting handwritten input on the input panel based on the position information is executed.
An input control program characterized by that. In the second step, the input area is set in the vicinity of the area where the object has contacted or pressed.
The input control program according to claim 7. In the first step, based on the identified shape of the region, it is determined whether the predetermined input is a right hand input or a left hand input,
In the second step, when it is determined that the input is performed by the right hand, a predetermined range on the left side of the region touched or pressed by the object is set as the input region, and it is determined that the input is performed by the left hand. In this case, a predetermined range on the right side of the area touched or pressed by the object is set as the input area.
The input control program according to claim 8. The predetermined area is a range where a pen held in the right hand or the left hand can reach,
The input control program according to claim 9. In addition to the device,
When contact or pressing of an object after the input area is set is detected, it is determined whether the input panel is handwritten input based on position information detected by the input panel, and the input panel Is determined based on the pressure information detected by the sensor and / or the area of the region specified by the position information detected by the input panel, and is a handwritten input in the input region, And when the said object is a pen, the 3rd step which receives the pressure information which the said input panel detected as handwritten information is performed,
The input control program according to any one of claims 7 to 10. The input panel includes a display unit,
In the second step, the input area is displayed in an identifiable manner on the display unit.
The input control program according to claim 7, wherein the input control program is a program.

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