JP2012252637A - Electronic pen, terminal device, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic pen which can be used by recognizing strokes of an optional range at the optional timing of a user from the content filled with the electronic pen, and to provide a terminal device and a program.SOLUTION: On the basis of entry information created by reading a coded pattern, an electronic pen recognizes strokes and determines whether or not the recognized strokes form a closed area. Then, when the recognized strokes form the closed area, the electronic pen transmits information for recognizing the strokes to a receiving device regarding the strokes positioned in the closed area out of the recognized strokes.

Description

  The present invention relates to a technique using a coding pattern readable by an electronic pen.

  In recent years, electronic pens that digitize written information have been developed, and “Anot pen” developed by Swedish company Anoto is known as a representative one. Anotopen is used with dedicated paper on which a predetermined dot pattern is printed. In addition to the usual ink cartridge for writing characters, etc., the anotopen has a small camera for capturing the dot pattern printed on the dedicated paper and the position coordinates on the dedicated paper from the captured dot pattern. A processor for calculating and a data communication unit for transmitting the calculated position coordinates and the like to an external device are mounted. When the user writes characters on the special paper with an anotopen or puts a check mark on the image designed on the special paper, the small camera captures the dot pattern printed on the special paper as the pen moves. The entry information such as characters and images written by the user is recognized from the continuous position coordinates calculated by the processor. Then, this entry information is transmitted from the Anotopen by the data communication unit to a nearby terminal device such as a personal computer or a mobile phone (for example, see Patent Document 1).

  Patent Document 2 discloses a system in which a stroke written with an electronic pen is stored in a server for a notebook on which a dot pattern is formed. In this system, when a rectangle passing through the row confirmation mark of a note is drawn with an electronic pen, the server performs predetermined processing on the image data of the stroke drawn in the area surrounded by the rectangle. Further, Patent Document 3 discloses a system in which a computer device receives information written on a paper sheet with an electronic pen from the electronic pen, and the computer device projects and displays the content written on the paper sheet with the electronic pen on a screen. Has been. Further, Patent Document 4 discloses a technique that includes a wireless communication function for the electronic pen as described above. As for the wireless communication function, Patent Document 5 discloses a technique for performing wireless communication based on a 3G (3rd Generation) wireless communication system by providing a SIM (Subscriber Identity Module Card) card for individual identification. ing.

Japanese Patent No. 3842283 Japanese Patent No. 4276957 JP 2009-020631 A Special table 2003-519423 gazette JP 2008-306721 A

  In collaborative learning and meetings in school classrooms, each participant writes a note on a sheet, and then extracts a necessary part from the note as necessary so that other participants can see it. You may want to display it. In this case, it is convenient if the user can specify the part to be displayed from the memo written on the paper at an arbitrary timing and in an arbitrary range. Therefore, the present invention mainly provides an electronic pen, a terminal device, and a program capable of specifying and using a stroke in an arbitrary range at an arbitrary timing of a user from contents entered with the electronic pen. Let it be an issue.

  In one aspect of the electronic pen according to the present invention, entry information generating means for reading a coded pattern and generating entry information relating to a handwritten stroke, stroke recognition means for recognizing a stroke based on the entry information, and the stroke recognition means A closed region determining means for determining whether or not the stroke recognized as a closed region forms a closed region; and when the closed region determining means determines that the stroke forms a closed region, the stroke recognizing means Stroke information transmission means for transmitting information for recognizing the stroke of the stroke recognized in the closed region to the receiving device.

  With this configuration, the electronic pen recognizes the stroke based on the entry information generated by reading the coded pattern, and determines whether or not the recognized stroke forms a closed region. Then, when the recognized stroke forms a closed region, the electronic pen transmits information for recognizing the stroke of the recognized stroke among the recognized strokes to the receiving device. Here, “a stroke forms a closed region” includes not only a case where one stroke forms a closed region, but also a case where a single closed region is formed by a plurality of strokes. By doing so, the user can enclose the portion of the contents written with the electronic pen with the stroke of the closed region with the electronic pen, and the information on the stroke in the closed region can be transferred to a predetermined terminal or the like. Can be sent. Accordingly, the electronic pen can be used by specifying a stroke in an arbitrary range at an arbitrary timing of the user from the contents entered with the electronic pen.

  In one aspect of the electronic pen, the stroke information transmitting unit fills in the stroke forming the closed region after the closed region determining unit determines that the stroke forms a closed region. When the stroke recognition means further recognizes a stroke indicating the predetermined mark, information for recognizing the stroke is transmitted. According to this aspect, the electronic pen can transmit information on the stroke in the closed region after confirming that the user has an intention to transmit more reliably. Therefore, the electronic pen can suppress erroneous transmission caused by accidentally or accidentally entering the stroke of the closed region without the intention of the user to transmit.

  In another aspect of the electronic pen described above, the stroke information transmitting unit is a case where the closed region determining unit determines that the stroke forms a closed region, and the stroke located in the closed region. When there is a predetermined amount or more, information for recognizing the stroke is transmitted. Here, the “predetermined amount” indicates a stroke amount measured from a predetermined viewpoint, and corresponds to, for example, the total length of the target stroke, the number of target strokes, and the like. According to this aspect, the electronic pen can suppress erroneous transmission caused by accidentally or accidentally entering the stroke of the closed region without the user's intention to transmit.

  In another aspect of the electronic pen, the stroke information transmitting unit recognizes the stroke in the stroke forming the closed region when the stroke recognizing unit recognizes the coding pattern of the predetermined area. Send information. This allows the electronic pen to consciously read the coded pattern of the predetermined area, thereby allowing the electronic pen to transmit information for recognizing the stroke in the stroke forming the closed region, Good operability.

  In another aspect of the electronic pen described above, the stroke information transmitting means transmits information for recognizing a stroke written in a predetermined time within a stroke forming a closed region. Thereby, it is possible to transmit only information for recognizing a stroke written within a predetermined time.

  In another aspect of the electronic pen, when the stroke information transmitting unit transmits information for recognizing the stroke, an audio output for notifying that the information for recognizing the stroke is transmitted Voice output means is further provided. According to this aspect, the user can easily grasp whether stroke information has been properly transmitted.

  In another aspect of the above-described electronic pen, when the closed region determination unit determines that the stroke forms a closed region, character recognition that recognizes a character composed of a stroke located in the closed region The stroke information transmission unit transmits a character code recognized by the character recognition unit as information for recognizing the stroke. According to this aspect, the electronic pen can preferably extract and transmit character information designated by the user from the generated entry information.

  In one aspect of the terminal device according to the present invention, an entry information receiving means for receiving the entry information from an electronic pen that reads an encoded pattern and generates entry information relating to a handwritten stroke, and recognizes a stroke based on the entry information. Stroke recognizing means, closed area determining means for determining whether or not the stroke recognized by the stroke recognizing means forms a closed area, and closed area determining means if the stroke forms a closed area If the determination is made, stroke information transmission means for transmitting information for recognizing the stroke of the strokes recognized in the closed region among the strokes recognized by the stroke recognition means to the receiving device is provided.

  According to this aspect, the terminal device receives entry information from the electronic pen, recognizes a stroke from the entry information, and determines whether or not the stroke forms a closed region. Then, when the recognized stroke forms a closed region, the terminal device transmits information for recognizing the stroke among the recognized strokes located in the closed region to the receiving device. Also in this aspect, the user surrounds a portion to be used among the contents written with the electronic pen with the stroke of the closed region with the electronic pen, thereby transmitting the information on the stroke in the closed region to a predetermined terminal or the like. be able to. Accordingly, the terminal device can extract and transmit only the stroke information designated by the user with the electronic pen from the entry information received from the electronic pen.

  In one aspect of the above terminal device, the stroke information transmitting means fills in the stroke forming the closed area after the closed area determining means determines that the stroke forms a closed area. When the stroke recognition means further recognizes a stroke indicating the predetermined mark, information for recognizing the stroke is transmitted. According to this aspect, the terminal device can transmit information on the stroke in the closed region after confirming that the user has an intention to transmit more reliably. Therefore, the terminal device can suppress erroneous transmission caused by accidentally or accidentally entering the stroke of the closed region without the intention of the user to transmit.

  In another aspect of the above terminal device, the stroke information transmitting means is a case where the closed area determining means determines that the stroke forms a closed area, and the stroke located in the closed area When there is a predetermined amount or more, information for recognizing the stroke is transmitted. According to this aspect, the terminal device can suppress erroneous transmission caused by accidentally or accidentally entering a stroke of the closed region without the user's intention to transmit.

  In another aspect of the terminal device, the stroke information transmitting unit recognizes the stroke in the stroke forming the closed region when the stroke recognizing unit recognizes the coding pattern of the predetermined area. Send information. Thereby, the user can cause the terminal device to consciously read the coded pattern of the predetermined area, thereby allowing the terminal device to transmit information for recognizing the stroke in the stroke forming the closed region, Good operability.

  In another aspect of the above terminal device, the stroke information transmitting means transmits information for recognizing a stroke written within a predetermined time within a stroke forming a closed region. Thereby, it is possible to transmit only information for recognizing a stroke written within a predetermined time.

  In another aspect of the above terminal device, when the stroke information transmitting means transmits information for recognizing the stroke, a voice output for notifying that information for recognizing the stroke is transmitted Voice output means is further provided. According to this aspect, the user can easily grasp whether stroke information has been properly transmitted.

  In another aspect of the terminal device described above, when the closed region determination means determines that the stroke forms a closed region, character recognition that recognizes a character composed of a stroke located in the closed region The stroke information transmission unit transmits a character code recognized by the character recognition unit as information for recognizing the stroke. According to this aspect, the terminal device can preferably extract and transmit character information designated by the user from the entry information received from the electronic pen.

  One aspect of the program according to the present invention is a program executed by an electronic pen, which reads an encoded pattern and generates entry information relating to a handwritten stroke, and recognizes a stroke based on the entry information. Stroke recognizing means, closed area determining means for determining whether or not the stroke recognized by the stroke recognizing means forms a closed area, and the closed area determining means determining that the stroke forms a closed area In this case, among the strokes recognized by the stroke recognition means, the electronic pen is caused to function as stroke information transmission means for transmitting information for recognizing the stroke to the receiving device for the stroke located in the closed region. .

  In another aspect of the program according to the present invention, an entry information receiving means for receiving an entry information from an electronic pen that is executed by a terminal device and that reads an encoded pattern and generates entry information relating to a handwritten stroke. Stroke recognition means for recognizing a stroke based on the entry information, closed area determination means for determining whether or not the stroke recognized by the stroke recognition means forms a closed area, and the stroke forms a closed area. A stroke for transmitting information for recognizing the stroke of the stroke recognized in the closed area among the strokes recognized by the stroke recognition means to the receiving device. The terminal device is caused to function as information transmission means.

  In one aspect of the above-described program, the stroke information transmitting means is overwritten on the stroke forming the closed area after the closed area determining means determines that the stroke forms a closed area. When the stroke recognition unit further recognizes a stroke indicating the predetermined mark, information for recognizing the stroke is transmitted.

  In another aspect of the program, the stroke information transmitting unit is a case where the closed region determining unit determines that the stroke forms a closed region, and the stroke located in the closed region is When there is a predetermined amount or more, information for recognizing the stroke is transmitted.

  In another aspect of the program, the stroke information transmitting unit recognizes the stroke in a stroke forming a closed region when the stroke recognizing unit recognizes a coding pattern of a predetermined area. Send information.

  In another aspect of the program, the stroke information transmitting means transmits information for recognizing a stroke that is entered within a predetermined time within a stroke forming a closed region.

  In another aspect of the program, when the stroke information transmitting unit transmits information for recognizing the stroke, a sound output for notifying that information for recognizing the stroke is transmitted is provided. The electronic pen is further caused to function as voice output means to be performed.

  In another aspect of the above program, when the closed region determination unit determines that the stroke forms a closed region, the character recognition unit recognizes a character composed of a stroke positioned in the closed region. Further, the electronic pen is caused to function, and the stroke information transmitting unit transmits a character code recognized by the character recognizing unit as information for recognizing the stroke.

  The electronic pen or the terminal device according to the present invention can be configured by installing these programs in the electronic pen or the terminal device to function.

  According to the present invention, the electronic pen recognizes the stroke based on the entry information generated by reading the coded pattern, and determines whether or not the recognized stroke forms a closed region. When the recognized stroke forms a closed region, the electronic pen transmits information for recognizing the stroke among the recognized strokes located in the closed region. By doing so, the user can enclose the portion of the contents written with the electronic pen with the stroke of the closed region with the electronic pen, and the information on the stroke in the closed region can be transferred to a predetermined terminal or the like. Can be sent. Therefore, the electronic pen can specify the stroke of an arbitrary range from the content entered with the electronic pen at an arbitrary timing of the user and transmit the information.

  Further, the terminal device receives the entry information from the electronic pen, recognizes the stroke from the entry information, and determines whether the stroke forms a closed region. Then, when the recognized stroke forms a closed region, the terminal device transmits information for recognizing the stroke among the recognized strokes located in the closed region to the receiving device. Accordingly, the terminal device can appropriately extract and transmit only the stroke information designated by the user with the electronic pen from the entry information received from the electronic pen.

It is a block diagram of the transmission stroke specific system which concerns on 1st Embodiment. It is explanatory drawing which shows the relationship between the arrangement | positioning of the dot in a dot pattern, and the value converted. (A) shows a dot pattern typically, and (b) is a figure showing an example of information corresponding to it. It is the schematic which shows the structure of an electronic pen. It is a functional block diagram of a computer apparatus. It is a flowchart which shows the processing flow which an electronic pen performs. (A) shows the state of the dot pattern paper after the stroke of the closed region surrounding the stroke already written by the electronic pen is entered, and (B) shows the screen displayed by the computer device. It is a block diagram of the transmission stroke specific system which concerns on a modification. It is a flowchart which shows the processing flow of the electronic pen which concerns on the 1st example of a modification. It is a flowchart which shows the processing routine when it determines with the flag standing. (A) shows the state of the dot pattern paper after the stroke of the closed region surrounding the stroke already entered by the electronic pen is entered, and (B) shows the screen displayed by the computer device in the modification. It is a flowchart which shows the process sequence which the electronic pen which concerns on the 2nd example of a modification performs. It is a block diagram of the transmission stroke specific system which concerns on 2nd Embodiment. It is the schematic which shows the functional structure of a terminal device. It is a flowchart which shows the processing flow which a terminal device performs in 2nd Embodiment. (A) shows the state of the dot pattern paper after the stroke of the closed region surrounding the stroke already entered by the electronic pen is entered, (B) shows the screen displayed by the terminal device, (C) Indicates a screen displayed by the computer device. The flowchart which shows the process sequence which a terminal device performs in the 1st example of a modification is shown. (A) shows the state of the dot pattern paper after the stroke of the closed region surrounding the stroke already entered by the electronic pen is entered, (B) shows the screen displayed by the terminal device in the modification, (C) shows the screen which a computer apparatus displays in a modification. The flowchart which shows the process sequence which a terminal device performs in the 2nd example of a modification is shown. The structure of the transmission stroke specific | specification system which concerns on the modification of 2nd Embodiment is shown. The dot pattern paper which concerns on the modification of 1st, 2 embodiment is shown.

  Hereinafter, a first embodiment and a second embodiment suitable for carrying out the present invention will be described with reference to the drawings. The transmission stroke specifying system according to each embodiment described below is preferably applied to collaborative learning in a school classroom, remote conference, etc., and the user specifies a stroke to be transmitted as entry information among the entered strokes. It is a system that can transmit.

<First Embodiment>
[Configuration of transmission stroke identification system]
FIG. 1 shows a configuration of a transmission stroke specifying system according to the first embodiment. As shown in FIG. 1, the transmission stroke specifying system according to the first embodiment includes an electronic pen 1 (1 </ b> A, 1 </ b> B) used by a user, dot pattern paper 2 on which a dot pattern is printed, and information entered from the electronic pen 1. And the like, a projector 4 that is connected to the computer device 3 and projects the same image as the display screen of the display onto the dot screen 5, and a dot screen 5 on which a dot pattern is printed. . Hereinafter, each of these components will be described.

(Dot pattern paper)
First, the dot pattern paper (electronic pen paper) 2 will be described. The dot pattern paper 2 is printed with a dot pattern (coded pattern) indicating position coordinates, which will be described later, on substantially the entire surface thereof by a printer or the like. The dot pattern is printed with an ink containing carbon that absorbs infrared rays so that the electronic pen 1 can read the dot pattern.

(Dot screen)
In the dot screen 5, a dot pattern (coded pattern) is printed on a white resin substrate with ink containing carbon that absorbs infrared rays so that the electronic pen 1 can read it. It has a layer structure protected by a resin layer or the like.

(Dot pattern)
Next, an Anoto dot pattern (coded pattern) printed on the dot pattern paper 2 or the dot screen 5 will be described with reference to FIGS. FIG. 2 is a diagram for explaining the relationship between dots of a dot pattern and values to which the dots are converted. As shown in FIG. 2, each dot of the dot pattern is associated with a predetermined value depending on its position. That is, each dot is associated with a value of 0 to 3 depending on which direction the top, bottom, left, or right is shifted from the reference position of the virtual grid (the intersection of the vertical and horizontal lines). The value of each dot can be further converted into a first bit value for the X coordinate and a second bit value for the Y coordinate. The position coordinates on the dot pattern paper 2 and the dot screen 5 are determined by the combination of information thus associated. A dot pattern is formed on the dot pattern paper 2 and the dot screen 5 so that the coordinate areas do not overlap.

  FIG. 3A shows an arrangement of a certain dot pattern. As shown in FIG. 3A, a 6 × 6 dot within a range of about 2 mm in length and width is a unique pattern no matter which part of the dot pattern paper 2 or dot screen 5 takes 6 × 6 dots. It is arranged to be. The dot pattern formed by these 36 dots holds position coordinates (for example, where the dot pattern is located on the dot pattern paper 2 or the dot screen 5). FIG. 3B is a diagram in which each dot shown in FIG. 3A is converted into a value associated with the regularity shown in FIG. 2 according to the shift direction from the reference position of the lattice. This conversion is performed by the electronic pen 1 that captures an image of a dot pattern.

(Electronic pen)
Next, the electronic pen 1 will be described with reference to FIG. FIG. 4 is a schematic diagram showing the structure of the electronic pen 1. 4, the electronic pen 1 includes an ink cartridge 104, an LED 105, a CMOS camera 106, a pressure sensor 107, a processor 108 including a CPU, a memory 109 such as a ROM and a RAM, A communication unit 111 including a real time clock 110, an antenna, and the like, and a battery 112 are provided. The tip of the ink cartridge 104 is a pen tip portion 103, and the user touches the pen tip portion 103 of the electronic pen 1 on the dot pattern paper 2 or the dot screen 5 and enters a stroke (handwritten stroke). To do. Here, the first contact of the pen tip portion 103 of the electronic pen 1 with the dot pattern paper 2 or the like is referred to as pen-down, and the pen up portion means that the pen tip portion 103 is separated from the contact (contact) state. Call it. A trajectory written between the pen-down and pen-up of the electronic pen 1 is one stroke, and characters, figures, etc. are composed of one or a plurality of strokes.

  The battery 112 is for supplying electric power to each component in the electronic pen 1. For example, the battery 112 is configured to turn on / off the electronic pen 1 itself by attaching and detaching a cap (not shown) of the electronic pen 1. May be. The real time clock 110 transmits time information indicating the current time (time stamp) and supplies the time information to the processor 108. The pressure sensor 107 detects the pressure applied through the ink cartridge 104 from the pen tip portion 103 when the user writes or taps characters or marks on the dot pattern paper 2 or the like with the electronic pen 1, that is, the writing pressure. The value is transmitted to the processor 108.

  The processor 108 switches on / off the switches of the LED 105 and the CMOS camera 106 based on the writing pressure data supplied from the pressure sensor 107. That is, when the user writes a character or the like on the dot pattern paper 2 or the like with the electronic pen 1, the pen pressure is applied to the pen tip portion 103, and when the pressure sensor 107 detects a writing pressure higher than a predetermined value, the processor 108 Then, it is determined that the user has started entry, and the LED 105 and the CMOS camera 106 are operated. Then, the communication unit 111 detects pen down information (hereinafter referred to as “pen down information PD”) detected by the pressure sensor 107 and identification information (hereinafter referred to as “pen ID”) of the electronic pen 1 described later. Are transmitted to the computer apparatus 3 as entry information. When the user finishes entering one stroke and moves the electronic pen 1 away from the dot pattern paper 2, the pressure sensor 107 detects pen-up because no writing pressure exceeding a predetermined value is detected. Then, the communication unit 111 associates the pen-up information detected by the pressure sensor 107 (hereinafter referred to as “pen-up information PU”) and the pen ID, and transmits the information as entry information to the computer apparatus 3.

  The LED 105 and the CMOS camera 106 are attached near the pen tip portion 103 of the electronic pen 1, and an opening 102 is formed in a portion of the housing 101 that faces the LED 105 and the CMOS camera 106. The LED 105 illuminates infrared rays toward the vicinity of the pen tip portion 103 on the dot pattern paper 2. The area is slightly shifted from the position where the pen tip 103 contacts the dot pattern paper 2. The CMOS camera 106 is provided with an infrared transmission filter that transmits infrared rays and blocks non-infrared rays. The CMOS camera 106 captures a dot pattern in an area illuminated by the LED 105, and the image data of the dot pattern is captured. This is supplied to the processor 108. Here, since carbon absorbs infrared rays, the infrared rays irradiated by the LED 105 are absorbed by the carbon contained in the dots. Therefore, the dot portion has a small amount of infrared reflection, and the portion other than the dot has a large amount of infrared reflection. By photographing with the CMOS camera 106, a threshold value is provided based on the difference in the amount of reflected infrared light, so that a dot region containing carbon can be distinguished from other regions. Accordingly, even when an entry field or the like is printed on the dot pattern paper 2, the printed ink does not absorb in the infrared region, so the processor 108 can recognize the dot pattern. Note that the shooting area by the CMOS camera 106 is a range including a size of about 2 mm × about 2 mm as shown in FIG. 3A, and the shooting by the CMOS camera 106 is performed at regular intervals of about 50 to 100 times per second. Is called. Further, the CMOS camera 106 has a sufficient depth of field in order to photograph dots clearly.

  While the user performs the entry, the processor 108 uses the dot pattern of the image data supplied by the CMOS camera 106 to determine the X and Y coordinates (hereinafter, simply “ "Coordinate data" or "coordinate information") is calculated continuously. That is, the processor 108 converts the image data of the dot pattern as shown in FIG. 3A supplied by the CMOS camera 106 into the data array shown in FIG. The data is converted into a Y coordinate bit value, and X and Y coordinate data are calculated from the data array by a predetermined calculation method. The processor 108 has a rotation correction processing function that corrects the arrangement of dots on the image due to the angle of the electronic pen 1 facing the dot pattern, and this function is exhibited during coordinate calculation. Then, the processor 108 associates the current time (time stamp: entered time information) transmitted from the real-time clock 110, writing pressure data, and X and Y coordinate data. Hereinafter, these associated data are collectively referred to as “coordinate attribute information”. The 6 × 6 dot pattern in the dot pattern paper 2 or the like does not overlap in the dot pattern paper 2, so when the user enters characters or the like with the electronic pen 1, the entered position is the dot pattern paper 2. It is possible to specify the position of the position by the coordinate calculation by the processor 108.

  The memory 109 stores property information such as a pen ID such as “pen01” for identifying the electronic pen 1, a pen manufacturer number, and a pen software version. In the case of the electronic pen 1B for reading and writing the dot pattern on the dot screen 5, the communication unit 111 receives the pen ID, time information (time stamp), writing pressure data, and X and Y coordinate data. In association therewith, it is transmitted to the computer apparatus 3 as entry information. In this case, transmission to the computer apparatus 3 by the communication unit 111 is immediately and sequentially performed by wireless transmission such as Bluetooth (registered trademark). Here, one or more pieces of coordinate attribute information generated between the pen-down and pen-up of the electronic pen 1 and transmitted to the computer device 3 are stored as stroke information by the computer device 3. In other words, one stroke is composed of one or a plurality of X and Y coordinates (coordinate points), and the computer apparatus 3 is configured by one or more composing one stroke by the pen-down information PD and the pen-up information PU. Recognize pieces of coordinate attribute information.

  On the other hand, in the case of the electronic pen 1A for filling in the dot pattern paper 2, when the processor 108 stores the generated entry information in the memory 109 and recognizes the stroke that forms the closed area, the processor 108 recognizes the stroke in the closed area. The entry information corresponding to is sent to the computer apparatus 3. This will be described in detail in the [Processing Flow] and [Specific Examples] sections.

  Note that the electronic pen 1A for writing on the dot pattern paper 2 has a structure in which the written contents are written on the dot pattern paper 2 with the ink of the ink cartridge 104 so that the written content can be visually recognized after writing. On the other hand, for the electronic pen 1B for reading and writing the dot pattern on the dot screen 5, the computer device 3 receives the entry information and projects the stroke on the projector 4 in accordance with the handwriting on the dot screen 5. Instead of the ink cartridge 104, a member that does not have ink and simply transmits the pen pressure applied to the pen tip portion 103 to the pressure sensor 107 may be used.

(Computer device)
Next, the computer apparatus 3 will be described. The computer device 3 includes, as hardware, an antenna device capable of data communication with the electronic pen 1, a processor such as a CPU, a memory such as a ROM and a RAM, a display, a mouse, a keyboard, and the like. The computer apparatus 3 may be configured by a tablet PC such as iPad (registered trademark), a PDA (Personal Data Assistance), a PC (personal computer) equipped with a display, or the like. The computer device 3 is an example of the “reception device” in the present invention.

  FIG. 5 is a functional block diagram of the computer apparatus 3. Functionally, the computer apparatus 3 includes an input unit 31 such as a mouse and a keyboard, a communication unit 32, a storage unit 33, a processing unit 34, a display unit 36, and an interface 38. The communication unit 32 includes an antenna receiving circuit and the like, receives entry information from the electronic pen 1, and transmits the received information to the processing unit 34. The display means 36 is constituted by a display or the like, and displays the contents instructed by the processing means 34. The interface 38 is an interface for connecting to the projector 4. The interface 38 transmits an image signal for displaying an image on the display unit 36 to the projector 4 based on a processing command of the processing unit 34, and projects the same image as the image on the display unit 36 in synchronization.

  The processing means 34 is constituted by a processor such as a CPU and controls the entire computer device 3. Specifically, when the computer apparatus 3 receives the entry information generated by reading the dot pattern when filling the dot pattern paper 2 with the electronic pen 1A, the stroke drawing means 341 of the processing means 34 A stroke based on the entry information is drawn and displayed on the display means 36.

  Further, the processing unit 34 causes the projector 4 to project the calibration mark onto the dot screen 5 by displaying at least two or more calibration marks on the display unit 36, and the calibration mark is projected. A coordinate conversion function for converting the coordinate system related to the dot pattern of the dot screen 5 to the coordinate system related to the display of the display means 36 by causing the electronic pen 1B to read the dot pattern at the determined position and receiving the entry information. Obtain (calibration processing function). Further, when the processing unit 34 receives the coordinate system data related to the dot pattern of the dot screen 5 using the coordinate conversion function obtained by the calibration process, the processing unit 34 displays the coordinate system applied to the display of the display unit 36. It is converted into data, and strokes are drawn or predetermined processing is performed.

  The storage means 33 is configured by a memory such as a ROM or a RAM. The storage unit 33 stores the entry information received from the electronic pen 1 for each pen ID according to the processing instruction of the processing unit 34. In addition, the storage unit 33 stores association information (also referred to as “coordinate definition information”) between the dot pattern paper 2 and the dot screen 5 and the coordinate range indicated by the corresponding dot pattern.

[Processing flow]
Next, a processing flow by the electronic pen 1A of the first embodiment will be described. FIG. 6 is a flowchart showing a processing flow executed by the electronic pen 1A. The processing flow shown in FIG. 6 is repeatedly executed every time the pen pressure is detected by the pressure sensor 107 of the electronic pen 1A.

  First, when the user enters characters on the dot pattern paper 2 with the electronic pen 1A, the pressure sensor 107 of the electronic pen 1A detects the writing pressure applied from the pen tip portion 103 through the ink cartridge 104, and the value is detected. Is transmitted to the processor 108 (step S101). Then, when the writing pressure is detected by the pressure sensor 107, the processor 108 determines that the user has started entry, and activates the LED 105 and the CMOS camera 106. The processor 108 generates entry information including the pen-down information PD (step S102).

  Then, the processor 108 determines whether or not the writing pressure detected by the pressure sensor 107 is “0” (step S103). If the writing pressure is not “0” (step S103; No), the LED 105 and the CMOS camera 106 are determined. By continuing to operate, the LED 105 is illuminated with infrared rays toward the vicinity of the pen tip portion 103 on the dot pattern paper 2, and the dot pattern in the area illuminated by the LED 105 is photographed by the CMOS camera 106. Then, the processor 108 continuously calculates the coordinate data on the dot pattern paper 2 of the stroke (handwriting) entered by the user from the dot pattern of the image data supplied by the CMOS camera 106 (step S104). Then, the processor 108 generates entry information including the coordinate data, the time transmitted from the real-time clock 110, the coordinate attribute information of the pen pressure data, and the pen ID (step S105).

  On the other hand, when the writing pressure becomes “0” (step S103; Yes), the processor 108 generates entry information including the pen-up information PU and the pen ID detected by the pressure sensor 107 (step S106). Then, the processor 108 stores the entry information generated during the period from the pen-down to the pen-up of the electronic pen 1A in the memory 109, and one or more items generated during the period from the pen-down to the pen-up of the electronic pen 1A. A stroke specified from the piece of coordinate attribute information is recognized (step S107).

  Then, the processor 108 determines whether or not the recognized stroke forms a closed region (step S108). When the recognized stroke does not form a closed region (step S108; No), the processing of the flowchart is ended. To do.

  On the other hand, if it is determined that the recognized stroke forms a closed region (step S108; Yes), the processor 108 is located in the closed region among the strokes recognized from the stroke information stored in the memory 109. It is determined whether or not the stroke to be drawn is drawn over a predetermined amount (step S109). Specifically, the processor 108 determines whether or not the number of strokes in the closed region is equal to or greater than a predetermined value, and / or the total value of the stroke lengths in the closed region is equal to or greater than a predetermined value. These predetermined values are determined in advance by experiments or the like so that there is no possibility of erroneously transmitting entry information due to, for example, a stroke of a closed region being drawn for erroneous entry or highlighting. Then, when a stroke of a predetermined amount or more is not drawn in the closed region (step S109; No), the processor 108 ends the process of the flowchart without transmitting entry information.

  On the other hand, when a stroke of a predetermined amount or more is drawn in the closed region (step S109; Yes), the processor 108 transmits the entry information regarding the stroke drawn in the closed region to the computer apparatus 3 by the communication unit 111. (Step S110). Then, the processor 108 deletes the transmitted entry information from the memory 109 and deletes the entry information relating to the stroke constituting the closed region (step S111).

[Concrete example]
Next, a specific example of the processing shown in the flowchart of FIG. 6 will be described in more detail with reference to FIGS. FIG. 7A shows the state of the dot pattern paper 2 after the stroke of the closed region surrounding the stroke already written by the electronic pen 1A is entered. FIG. 7B shows the display means of the computer device 3. 36 shows a computer device screen 360 displayed.

  As shown in FIG. 7A, first, the user performs memo writing or the like necessary for the dot pattern paper 2 with the electronic pen 1A. More specifically, after the title “group learning” is described, “A's thought”, “B's idea”, and “C's idea” are specifically described. In this case, the electronic pen 1A generates entry information based on the pen pressure detected by the pressure sensor 107 and the image data of the dot pattern generated by the CMOS camera 106 (see steps S101 to S106), and each time there is a pen up. The entry information generated from the pen down to the pen up of the electronic pen 1A is stored (see step S107).

  Next, the user wants to display the specific contents of “B's idea” and “C's idea” described on the dot pattern paper 2 on the computer device screen 360 and the dot screen 5, and surrounds them. The stroke of the closed area is entered with the electronic pen 1A. In this case, the electronic pen 1A determines that the recognized stroke forms a closed region (see step S108), and determines that a stroke of a predetermined amount or more is drawn in the closed region (step S109). reference). Then, the electronic pen 1A transmits the entry information regarding the stroke drawn in the closed region to the computer device 3 (see step S110), and deletes the transmitted entry information and the entry information of the stroke forming the closed region (step S110). (See S111). When the computer apparatus 3 receives the entry information from the electronic pen 1A, the processing unit 34 displays the stroke recognized from the received entry information on the computer apparatus screen 360 as shown in FIG. 7B. The projector 4 projects the same image as the computer device screen 360 on the dot screen 5 based on the image signal transmitted from the computer device 3.

  As described above, the user of the electronic pen 1A can determine the portion to be displayed in the arbitrary range based on the arbitrary timing among the contents written on the dot pattern paper 2, and display the portion on the dot screen 5 or the like. It becomes possible.

[Operational effects of the transmission stroke specifying system of the first embodiment]
According to the transmission stroke specifying system of the first embodiment, the electronic pen 1A stores the generated entry information, recognizes a stroke from pen-up to pen-down based on the entry information, and the recognized stroke indicates a closed region. If it is formed, entry information regarding the stroke located in the closed region is transmitted to the computer apparatus 3. By doing in this way, the user can designate the part which wants to display on the dot screen 5 among the contents written with the electronic pen 1A by enclosing with a stroke of a closed area with the electronic pen 1A. Therefore, the electronic pen 1A can specify a stroke in an arbitrary range and display it on the dot screen 5 at an arbitrary timing of the user.

  In addition, even when the electronic pen 1A determines that the stroke forms a closed region, only when there is a predetermined amount or more of the stroke located in the closed region, the stroke pen information in the closed region Is transmitted to the computer apparatus 3. Accordingly, the electronic pen 1A can suppress erroneous transmission even when the stroke of the closed region is accidentally or mistakenly entered without the user's intention to transmit.

[Modification]
Next, a modification of this embodiment will be described. The following modifications may be applied in any combination to the first embodiment described above.

(Modification 1)
In addition to the configuration shown in FIG. 4, the electronic pen 1 </ b> A further includes a speaker for outputting sound, and when sending the entry information in step S <b> 110 of FIG. 6, the entry information such as “send” is transmitted. Audio output may be performed. Thereby, electronic pen 1A can make a user surely recognize that entry information was transmitted.

(Modification 2)
The electronic pen 1A may have a character recognition function, and may transmit to the computer device 3 a character code recognized from a stroke recognized by the entry information, instead of the entry information. Specifically, in this case, after determining in step S109 that a stroke of a predetermined amount or more has been drawn in the closed region, the electronic pen 1A recognizes characters from the stroke drawn in the closed region in step S110. Then, the character code of the recognized character is transmitted to the computer device 3. And the computer apparatus 3 draws a character in a display screen based on the received character code. In this case, in addition to the character code, the electronic pen 1A may transmit information indicating the position of the character indicated by the character code on the dot pattern paper 2 to the computer device 3. Thereby, the computer apparatus 3 can draw the characters in the closed region on the display screen while maintaining the positional relationship in the dot pattern paper 2.

(Modification 3)
In place of or in addition to the configuration shown in FIG. 1, the electronic pen 1A is configured to be communicable with a mobile phone communication network and the Internet, and information regarding strokes in a closed region via the mobile phone communication network and the Internet. May be transmitted to the server device. FIG. 8 shows a configuration of a transmission stroke specifying system according to a modification. In FIG. 8, the electronic pen 1A is mounted with, for example, a chip (3G chip) corresponding to a SIM (Subscriber Identity Module) and a third generation mobile communication system. Then, the electronic pen 1A transmits the entry information regarding the stroke in the closed region to the base station 7 in step S110 of FIG. And the server apparatus 9 receives entry information via the network 8 comprised with a mobile telephone communication network and the internet, and memorize | stores the said entry information. The server device 9 is an example of the “receiving device” in the present invention.

  As described above, according to the configuration of the third modification, the transmission stroke specifying system is preferably used even when the electronic pen 1A and the server device 9 that receives the entry information cannot directly perform wireless communication. Specific entry information can be exchanged via the network 8. In place of the mobile phone communication network of the network 8, the electronic pen 1A transmits entry information to a receiver such as an access point by wireless communication, and the server via a communication network other than the mobile phone communication network 8 such as the Internet. The entry information may be transmitted to the device 9.

(Modification 4)
In the description of FIGS. 6 and 7, when the electronic pen 1 </ b> A detects a stroke that forms a closed region, the electronic pen 1 </ b> A transmits entry information regarding the stroke in the closed region to the computer device 3. Instead, the electronic pen 1A detects a stroke that forms a closed region, and a mark such as a predetermined character or symbol (“transmission instruction mark”) that instructs transmission on the stroke that forms the closed region. When it is detected that the information is entered, the entry information relating to the stroke in the closed region may be transmitted to the computer apparatus 3.

  Two specific examples of processing procedures (first example and second example) in this case will be described.

1. First Example First, a first example according to Modification 4 will be specifically described with reference to FIGS. 9 to 11. FIG. 9 and FIG. 10 are an example of a flowchart illustrating a processing procedure executed by the electronic pen 1A according to the first example of the fourth modification. The processing flow shown in FIGS. 9 and 10 is repeatedly executed when the pen pressure is detected by the pressure sensor 107. In addition, since the process from step S201 to step S207 is the same as the process from step S101 to step S107, the description is omitted.

  First, after the entry information from pen-up to pen-down is stored in step S207 in FIG. 9, the processor 108 of the electronic pen 1A determines whether or not a flag is set (step S208). This flag is information for determining whether or not the routine for detecting the transmission instruction mark shown in FIG. 9 should be started, and is set when a predetermined stroke forming the closed region is detected, as will be described later. . If it is determined that the flag is not set (step S208; No), the processor 108 determines whether or not the recognized stroke forms a closed region, similarly to step S108 (step S209). Then, the processor 108 determines that the stroke forms a closed region (step S209; Yes), and determines that a stroke of a predetermined amount or more is drawn in the closed region (step S210). ; Yes), a flag indicating that the closed region has been formed is set (step S211).

  Then, when the pressure sensor 107 of the electronic pen 1A detects the writing pressure, the entry information from the pen up to the pen down is generated and the stroke is recognized, the processor 108 sets a flag in step S208. (Step S208; Yes), the process after Step S212 shown in FIG. 10 is performed. Specifically, first, it is determined whether or not a transmission instruction mark has been entered over the stroke forming the closed region (step S212). If it is determined that the transmission instruction mark has been entered (step S212; Yes) ), The processor 108 transmits the entry information regarding the stroke drawn in the closed region to the computer apparatus 3 (step S213). Then, the processor 108 deletes the entry information transmitted to the computer apparatus 3, the entry information relating to the stroke forming the closed region, the entry information relating to the stroke forming the transmission instruction mark, and the flag (step S214). On the other hand, if it is determined that the transmission instruction mark is not entered (step S212; No), the processor 108 ends the process of the flowchart.

  11A and 11B are diagrams illustrating specific examples of the flowcharts illustrated in FIGS. 9 and 10. As shown in FIG. 11A, the user uses the electronic pen 1A to enter the stroke of the closed region so as to surround a part of the note to be displayed. As a result, the processor 108 sets a flag indicating that the closed region has been formed (see step S211). Next, the user enters “S”, which is a transmission instruction mark, over the stroke of the closed region with the electronic pen 1A. As a result, the processor 108 determines that a transmission instruction mark has been written over the stroke forming the closed region (see step S212), and transmits the entry information regarding the stroke drawn in the closed region to the computer apparatus 3. (See step S213). When the computer apparatus 3 receives the entry information from the electronic pen 1A, the processing unit 34 displays a stroke recognized from the received entry information on the computer apparatus screen 360 as shown in FIG. 11B. The projector 4 projects the same image as the computer device screen 360 on the dot screen 5 based on the image signal transmitted from the computer device 3.

  As described above, according to the first example of the modified example 4, the transmission stroke specifying system can also allow the user to select a stroke to be transmitted among the strokes entered on the dot pattern sheet 2 and can transmit the transmission instruction mark. Since the intention to transmit can be confirmed by filling in, erroneous transmission can be reliably suppressed. Even if the transmission instruction mark itself is a character or the like including a closed region (for example, “ha”), the electronic pen 1A appropriately recognizes the transmission instruction mark according to the flowcharts shown in FIGS. It is possible to specify the entry information regarding the stroke to be transmitted.

2. Second Example Next, a second example according to Modification 4 will be described with reference to FIG. FIG. 12 is an example of a flowchart illustrating a processing procedure executed by the electronic pen 1A according to the second example of the fourth modification. The processing flow shown in FIG. 12 is repeatedly executed when the pen pressure is detected by the pressure sensor 107. In addition, since the process from step S301 to step S307 is the same as the process from step S201 to step S207, the description is omitted.

  After step S307, similarly to step S108 and step S209, the processor 108 determines whether or not the recognized stroke forms a closed region (step S308), and determines that the stroke forms a closed region. If so (step S308; Yes), it is determined whether or not a stroke of a predetermined amount or more is drawn in the closed region (step S309). If a stroke of a predetermined amount or more is drawn in the closed region (step S309; Yes), the processor 108 sets a flag indicating that the closed region has been formed (step S310), and proceeds to step S311. . Next, the processor 108 determines whether or not a flag is set (step S311). If the flag is set (step S311; Yes), the processing of steps S212 to S214 shown in FIG. 10 described above is performed. Execute.

  As described above, according to the second example of the modification example 4, the transmission stroke specifying system can also allow the user to select a stroke to be transmitted among the strokes entered on the dot pattern paper 2 and can transmit the transmission instruction mark. Since the intention to transmit can be confirmed by filling in, erroneous transmission can be reliably suppressed. Further, according to the second example, when there are a plurality of parts to be transmitted and each of them is separated and written on the dot pattern paper 2, the user continues to stroke each part to be transmitted with the electronic pen 1A. Even if the transmission instruction mark is continuously described on the strokes of the closed areas after being enclosed, the electronic pen 1A appropriately enters the entry information relating to the strokes enclosed by the strokes of the closed areas. 3 can be transmitted. In this case, in step S310, the electronic pen 1A sets a different flag for each stroke of the closed region, and in step S214, deletes the flag corresponding to the stroke of the closed region in which the transmission instruction mark is overwritten.

(Modification 5)
In the description of FIG. 6 and the like, the electronic pen 1 </ b> A transmits the entry information regarding the stroke in the closed region formed by one stroke to the computer device 3. However, the method to which the present invention is applicable is not limited to this. In addition to this, the electronic pen 1 </ b> A may transmit entry information regarding strokes in a closed region formed by a plurality of strokes to the computer apparatus 3.

(Modification 6)
In the first embodiment, the Anoto coding pattern (dot pattern) is used. However, any coding pattern indicating position coordinates may be used, and the Anoto coding is not limited.

Second Embodiment
Next, a second embodiment will be described. FIG. 13 shows a configuration of a transmission stroke specifying system according to the second embodiment. The transmission stroke specifying system according to the second embodiment includes a terminal device 6, and the first embodiment is that the terminal device 6 performs processing for specifying input information to be transmitted among the input information transmitted from the electronic pen 1 </ b> A. Different from the transmission stroke identification system. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  In the second embodiment, similarly to the electronic pen 1B, the electronic pen 1A transmits the generated entry information to the terminal device 6 immediately and sequentially by the communication unit 111 by wireless transmission such as Bluetooth (registered trademark). Send.

  Here, the terminal device 6 will be specifically described. FIG. 14 is a schematic diagram illustrating a functional configuration of the terminal device 6. The terminal device 6 includes, as hardware, an antenna device capable of data communication with the electronic pen 1A, a processor such as a CPU, a memory such as a ROM and a RAM, a display, and the like. The terminal device 6 may be configured by a tablet PC such as iPad (registered trademark), a PDA (Personal Data Assistance), or a PC (personal computer) including a display.

  Functionally, the terminal device 6 includes an input unit 61 such as a touch panel, communication units 62 and 67, a storage unit 63, a processing unit 64, and a display unit 66. The communication unit 62 includes an antenna receiving circuit and the like, receives entry information from the electronic pen 1 </ b> A, and transmits the received information to the processing unit 64. The display unit 66 is configured by a display or the like, and displays the contents instructed by the processing unit 64. The communication unit 67 transmits specific entry information among the entry information received from the electronic pen 1 </ b> A to the computer apparatus 3 by wireless communication such as Wi-Fi (registered trademark) based on the processing instruction of the processing unit 64.

  The processing means 64 is constituted by a processor such as a CPU and controls the entire terminal device 6. Specifically, when the terminal device 6 receives the entry information generated by reading the dot pattern when filling the dot pattern paper 2 with the electronic pen 1A, the stroke drawing means 641 of the processing means 64 The display unit 66 displays a stroke based on the entry information.

  Further, the transmission control means 642 of the processing means 64 determines whether or not the stroke recognized from the received entry information forms a closed area, and the stroke forms a closed area and is equal to or larger than a predetermined amount in the closed area. If it is determined that there is a stroke, entry information relating to the stroke in the closed region is transmitted to the computer apparatus 3. This specific process will be described in detail in the sections “Process Flow” and “Specific Example”.

  The storage unit 63 is configured by a memory such as a ROM or a RAM. The storage unit 63 stores the entry information received from the electronic pen 1A for each pen ID according to the processing instruction of the processing unit 64. The storage unit 63 stores coordinate definition information indicating the coordinate range of the dot pattern corresponding to the dot pattern paper 2.

[Processing flow]
Next, the processing flow by the terminal device 6 of 2nd Embodiment is demonstrated. FIG. 15 is a flowchart illustrating a processing flow executed by the terminal device 6. The processing flow shown in FIG. 15 is repeatedly executed every time entry information is received from the electronic pen 1A.

  First, when the user enters characters on the dot pattern paper 2 with the electronic pen 1A, the electronic pen 1A recognizes the dot pattern printed on the dot pattern paper 2 and supplies the coordinate attribute information, the pen ID, and the like. Corresponding entry information is generated and transmitted to the terminal device 6. In the terminal device 6, when the communication unit 62 receives the entry information, the processing unit 64 stores the entry information in the storage unit 63 (step S401). Then, the stroke drawing unit 641 of the processing unit 64 causes the display unit 66 to draw the stroke recognized by the entry information in real time (step S402).

  Next, the transmission control unit 642 of the processing unit 64 determines whether or not the stroke recognized and drawn in step S402 forms a closed region (step S403), and the stroke does not form a closed region. (Step S403; No), the process of the flowchart is terminated. On the other hand, when the stroke forms a closed region (step S403; Yes), the transmission control unit 642 determines whether or not a stroke of a predetermined amount or more is drawn in the closed region (step S404), and the closed region is closed. When a stroke of a predetermined amount or more is not drawn in the area (step S404; No), the process of the flowchart is ended. On the other hand, if a stroke of a predetermined amount or more is drawn in the closed area (step S404; Yes), the transmission control means 642 uses the communication means 67 to enter the entry information regarding the stroke drawn in the closed area. 3 (step S405).

[Concrete example]
Next, a specific example of the process shown in the flowchart of FIG. 15 will be described in more detail with reference to FIGS. 16A shows the state of the dot pattern paper 2 after the stroke of the closed region surrounding the stroke already written by the electronic pen 1A is entered, and FIG. 16B shows the display means of the terminal device 6. 66 shows the terminal device screen 660 displayed, and FIG. 16C shows the computer device screen 360 displayed by the display means 36 of the computer device 3.

  As shown in FIG. 16A, first, the user performs memo writing or the like necessary for the dot pattern paper 2 with the electronic pen 1A. In this case, the electronic pen 1A generates entry information and transmits the entry information to the terminal device 6 immediately and sequentially. The terminal device 6 receives the entry information by the communication unit 62, and stores the entry unit 63. (See step S401). Then, the terminal device 6 displays the stroke recognized based on the entry information transmitted from the electronic pen 1A on the terminal device screen 660 in real time (see step S402).

  Next, the user wants to display a part of the memo written on the dot pattern paper 2 on the computer device screen 360 and the dot screen 5, and closes the closed region so as to surround a part of the memo written to be displayed. The stroke is entered with the electronic pen 1A. In this case, the terminal device 6 determines that the stroke recognized based on the entry information transmitted from the electronic pen 1A forms a closed region (see step S403), and a stroke of a predetermined amount or more in the closed region. Is drawn (see step S404). Accordingly, in this case, the terminal device 6 transmits entry information regarding the stroke drawn in the closed region to the computer device 3 (see step S405).

  When the computer device 3 receives the entry information from the terminal device 6, the processing unit 34 displays the stroke recognized from the received entry information on the computer device screen 360 as shown in FIG. The projector 4 projects the same image as the computer device screen 360 on the dot screen 5 based on the image signal transmitted from the computer device 3. As described above, the user of the electronic pen 1A can determine the portion to be displayed in the arbitrary range based on the arbitrary timing among the contents written on the dot pattern paper 2, and display the portion on the dot screen 5 or the like. It becomes possible.

[Operational effect of the transmission stroke specifying system of the second embodiment]
According to the transmission stroke specifying system of the second embodiment, the terminal device 6 stores the entry information received from the electronic pen 1A, recognizes the stroke from pen-up to pen-down based on the entry information, and recognizes the recognized stroke. When the closed area is formed, the entry information regarding the stroke located in the closed area is transmitted to the computer apparatus 3. By doing in this way, the user can designate the part which wants to display on the dot screen 5 among the contents written with the electronic pen 1A by enclosing with a stroke of a closed area with the electronic pen 1A. Accordingly, the terminal device 6 can specify an arbitrary range of strokes and display them on the dot screen 5 at an arbitrary timing of the user.

  Further, even when the terminal device 6 determines that the stroke forms a closed region, only when there is a predetermined amount or more of the stroke located in the closed region, the stroke entry information in the closed region Is transmitted to the computer apparatus 3. Thereby, the terminal device 6 can suppress erroneous transmission even when the stroke of the closed region is accidentally or mistakenly entered without the user's intention to transmit.

[Modification of Second Embodiment]
Next, a modification of the second embodiment will be described. In the second embodiment, in addition to the modifications 5 and 6 of the first embodiment, the following modifications 7 to 11 can be arbitrarily combined and applied.

(Modification 7)
In addition to the configuration shown in FIG. 14, the terminal device 6 further includes a speaker for outputting sound, recognizes a stroke that configures the closed region, and transmits “entry” when transmitting entry information regarding the stroke in the closed region. A voice output indicating that the entry information such as “mass” is transmitted may be performed. Thereby, the terminal device 6 can make a user recognize reliably that entry information was transmitted.

(Modification 8)
The terminal device 6 may include a character recognition function, and may transmit a character code recognized from a stroke recognized by the entry information to the computer device 3 instead of the entry information. Specifically, in this case, after determining that a stroke of a predetermined amount or more is drawn in the closed region in step S404 in FIG. 15, the terminal device 6 determines the stroke drawn in the closed region in step S405. And the character code of the recognized character is transmitted to the computer device 3. And the computer apparatus 3 draws a character in a display screen based on the received character code. In this case, in addition to the character code, the terminal device 6 may transmit information indicating the position of the character indicated by the character code on the dot pattern paper 2 to the computer device 3. Thereby, the computer apparatus 3 can draw the characters in the closed region on the display screen while maintaining the positional relationship in the dot pattern paper 2.

(Modification 9)
The terminal device 6 transmits the entry information to the computer device 3 in step S405 of the flowchart of FIG. Instead, the terminal device 6 may generate image data displaying a stroke recognized by the entry information and transmit the image data to the computer device 3. Also according to this aspect, the computer apparatus 3 can display the received image data on the display screen, thereby suitably displaying the stroke specified by the user. In this case, the terminal device 6 may transmit information indicating the position and range of the image data on the dot pattern paper 2 to the computer device 3 in addition to the image data. Thereby, the computer apparatus 3 can draw the characters in the closed region on the display screen while maintaining the positional relationship in the dot pattern paper 2.

(Modification 10)
In the description of FIG. 15 and the like, when the terminal device 6 recognizes the stroke forming the closed region based on the entry information, the terminal device 6 transmits the entry information regarding the stroke in the closed region to the computer device 3. Instead, as in the fourth modification of the first embodiment, the terminal device 6 recognizes the stroke that forms the closed region, and the transmission instruction mark is written on the stroke that forms the closed region. When the determination is made, the entry information regarding the stroke in the closed region may be transmitted to the computer apparatus 3.

  Two specific examples of processing procedures (first example and second example) in this case will be described.

1. First Example First, a first example according to Modification 10 will be specifically described with reference to FIG. FIG. 17 is an example of a flowchart illustrating a processing procedure executed by the terminal device 6 according to the first example of the modification 10. The processing flow shown in FIG. 17 is repeatedly executed when the terminal device 6 receives entry information with the electronic pen 1A.

  First, the processing means 64 of the terminal device 6 stores the entry information received from the electronic pen 1A in the storage means 63 (step S501), and then causes the display means 66 to draw a stroke recognized by the entry information (step S501). S502). Next, the processing means 64 determines whether or not a flag is set (step S503). If it is determined that the flag is not set (step S503; No), the processing unit 64 determines whether or not the recognized stroke forms a closed region (step S504), similarly to step S403. If it is determined that the stroke forms a closed region (step S504; Yes), it is determined whether or not a stroke of a predetermined amount or more is drawn in the closed region, similarly to step S404 (step S505). If it is determined that a stroke of a predetermined amount or more is drawn in the closed region (step S505; Yes), the processing unit 64 sets a flag indicating that the closed region has been formed (step S506).

  Next, when the entry information is received from the electronic pen 1A and a new stroke is recognized, the processing means 64 determines that the flag is set (step S503; Yes), and the stroke that forms the closed region is determined. Again, it is determined whether or not the transmission instruction mark has been entered (step S507). If it is determined that the transmission instruction mark has been entered (step S507; Yes), the entry information regarding the stroke drawn in the closed region is entered. It transmits to the computer apparatus 3 (step S508).

  18A to 18C are diagrams showing specific examples of the flowchart shown in FIG. As shown in FIG. 18 (A), when the user enters the stroke of the closed region so as to surround a part of the note to be displayed with the electronic pen 1A, the terminal device 6 is shown in FIG. 18 (B). As described above, the stroke of the closed region is drawn on the terminal device display screen 660 based on the entry information received from the electronic pen 1A (see step S502). Then, the terminal device 6 determines that the stroke forms a closed area (see step S504) and that a stroke of a predetermined amount or more is drawn in the closed area (see step S505), and the closed area Is flagged (see step S506).

  Next, the user enters “S”, which is a transmission instruction mark, over the stroke of the closed region with the electronic pen 1A. As a result, the processing means 64 draws a stroke indicating “so” on the terminal device display screen 660 based on the received stroke (see step S502), and the transmission instruction mark is superimposed on the stroke forming the closed region. It is determined that the entry has been made (see step S507), and entry information relating to the stroke drawn in the closed region is transmitted to the computer apparatus 3 (see step S508). When the computer device 3 receives the entry information from the terminal device 6, as shown in FIG. 18C, the processing means 34 displays the stroke recognized from the received entry information on the computer device screen 360. The projector 4 projects the same image as the computer device screen 360 on the dot screen 5 based on the image signal transmitted from the computer device 3.

  Thus, also according to the first example of the modification 10, the transmission stroke specifying system allows the user to select a stroke to be displayed on the computer device screen 360 and the dot screen 5 among the strokes entered on the dot pattern paper 2. In addition, it is possible to reliably suppress erroneous transmission by filling in the transmission instruction mark.

2. Second Example Next, a second example according to Modification 10 will be described with reference to FIG. FIG. 19 is an example of a flowchart illustrating a processing procedure executed by the terminal device 6 in the second example of the modification 10. The processing flow shown in FIG. 19 is repeatedly executed every time the terminal device 6 receives entry information from the electronic pen 1A. In addition, since the process from step S601 to step S604 is the same as the process from step S401 to step S404, the description thereof is omitted.

  If it is determined in step S604 that a stroke of a predetermined amount or more has been drawn in the closed region, the processing means 64 sets a flag indicating that the closed region has been formed (step S605). Thereafter, the processing means 64 determines that the flag is set in step S606 (step S606; Yes), and when a transmission instruction mark is written on the stroke forming the closed region (step S607; Yes), the entry information regarding the stroke drawn in the closed region is transmitted to the computer apparatus 3 (step S608).

  As described above, according to the second example of the modified example 10, the transmission stroke specifying system can also allow the user to select a stroke to be transmitted among the strokes entered on the dot pattern sheet 2 and can transmit a transmission instruction mark. It is possible to reliably suppress erroneous transmissions by filling in. Further, according to the second example, when there are a plurality of parts to be transmitted and each of them is separated and written on the dot pattern paper 2, the user continues to stroke each part to be transmitted with the electronic pen 1A. Even if the transmission instruction mark is continuously described on the stroke of each closed region after the frame is enclosed, the terminal device 6 appropriately enters the entry information regarding the stroke surrounded by the stroke of each closed region. 3 can be transmitted. In this case, the terminal device 6 sets a different flag for each stroke of each closed region in step S605.

(Modification 11)
Instead of or in addition to the configuration illustrated in FIG. 13, the terminal device 6 may transmit entry information to the server device via a communication network such as the Internet by wireless communication. FIG. 20 shows a configuration of a transmission stroke specifying system according to a modification. In FIG. 20, when the terminal device 6 recognizes a stroke forming the closed region, the terminal device 6 transmits entry information regarding the stroke in the closed region to the receiver 10 such as an access point by Wi-Fi (registered trademark) or the like. To do. Then, the server device 9 receives the entry information via the communication network and stores the entry information.

  As described above, according to the configuration of the modification 11, the transmission stroke specifying system is preferably used even when the electronic pen 1A and the server device 9 that receives the entry information cannot directly perform wireless communication. Specific entry information can be exchanged via the communication network. The terminal device 6 may be equipped with a chip (3G chip) compatible with the SIM and the third generation mobile communication system, and may transmit entry information to the server device 9 via the mobile phone communication network and the Internet.

(Modification 12)
In the first and second embodiments, when a stroke of a predetermined stroke amount or more is drawn in the stroke forming the closed region drawn by the electronic pen 1, the entry information about the enclosed stroke is displayed. Instead, as shown in FIG. 21, a “range designation transmission” area 21 is provided, and when the dot pattern in the area 21 is read with the electronic pen 1, a closed region is formed. You may make it transmit the entry information about the stroke in a stroke.
That is, the user draws a stroke or the like so as to form a closed region with the electronic pen 1 after completing writing of the sentence or the like on the dot pattern paper 2 with the electronic pen 1, and then performs “range designation transmission”. By tapping the area 21, entry information about the stroke in the stroke is transmitted from the electronic pen 1 so as to form a closed region (first embodiment) or transmitted from the terminal device 6 to the computer device 3. You may make it like (2nd Embodiment). Even if the operation of drawing the stroke of the closed area with the electronic pen 1 and the operation of tapping the “range designation transmission” area 21 are performed in the reverse order, the same entry information may be transmitted.
In this case, it is not necessary to make the transmission condition that a stroke of a predetermined stroke amount or more is drawn in the stroke forming the closed region.

(Modification 13)
In the first and second embodiments, the transmission condition is added, and the stroke information within the stroke forming the closed region is referred to the time information of the entry information, and the entry information entered within the designated time is added. When such a stroke exists more than a predetermined stroke amount, the entry information entered within the designated time may be transmitted. Thereby, for example, only the strokes entered within the answer time designated by the teacher can be displayed on the display. Further, the extraction and transmission of entry information entered within a designated time may be applied to each modification.

DESCRIPTION OF SYMBOLS 1 (1A, 1B) ... Electronic pen 2 ... Dot pattern paper 3 ... Computer apparatus 4 ... Projector 5 ... Dot screen 6 ... Terminal device 7 ... Base station 8 ... Cell-phone communication network 9 ... Server apparatus 10 ... Receiver

Claims (22)

Entry information generating means for reading the coded pattern and generating entry information relating to the handwritten stroke;
Stroke recognition means for recognizing a stroke based on the entry information;
Closed region determination means for determining whether or not the stroke recognized by the stroke recognition means forms a closed region;
When the closed region determination unit determines that the stroke forms a closed region, the stroke for recognizing the stroke among the strokes recognized by the stroke recognition unit is located in the closed region. An electronic pen comprising stroke information transmitting means for transmitting information to a receiving device. The stroke information transmitting means includes
After the closed region determining means determines that the stroke forms a closed region, the stroke recognizing unit further recognizes a stroke indicating a predetermined mark which is overwritten on the stroke forming the closed region. In this case, information for recognizing the stroke is transmitted. The stroke information transmitting means includes
When the closed region determination means determines that the stroke forms a closed region, and there is a predetermined amount or more of the stroke located in the closed region, information for recognizing the stroke is transmitted. The electronic pen according to claim 1, wherein the electronic pen is an electronic pen. The stroke information transmitting means includes
2. The electronic pen according to claim 1, wherein the stroke recognizing unit transmits information for recognizing the stroke in the stroke forming the closed region when recognizing a coding pattern of a predetermined area. . The stroke information transmitting means includes
5. The electronic pen according to claim 1, wherein information for recognizing a stroke written within a predetermined time within a stroke forming a closed region is transmitted.   When the stroke information transmitting unit transmits information for recognizing the stroke, the stroke information transmitting unit further includes a sound output unit for performing a sound output for notifying that the information for recognizing the stroke is transmitted. The electronic pen according to any one of claims 1 to 5. When the closed region determination means determines that the stroke forms a closed region, the device further comprises character recognition means for recognizing characters composed of strokes located in the closed region,
The electronic pen according to any one of claims 1 to 6, wherein the stroke information transmitting unit transmits a character code recognized by the character recognizing unit as information for recognizing the stroke. . An entry information receiving means for receiving the entry information from an electronic pen that reads an encoded pattern and generates entry information relating to a handwritten stroke;
Stroke recognition means for recognizing a stroke based on the entry information;
Closed region determination means for determining whether or not the stroke recognized by the stroke recognition means forms a closed region;
When the closed region determination unit determines that the stroke forms a closed region, the stroke for recognizing the stroke among the strokes recognized by the stroke recognition unit is located in the closed region. A terminal device comprising stroke information transmitting means for transmitting information to a receiving device. The stroke information transmitting means includes
After the closed region determining means determines that the stroke forms a closed region, the stroke recognizing unit further recognizes a stroke indicating a predetermined mark which is overwritten on the stroke forming the closed region. The terminal device according to claim 8, wherein information for recognizing the stroke is transmitted in the case of being performed. The stroke information transmitting means includes
When the closed region determination means determines that the stroke forms a closed region, and there is a predetermined amount or more of the stroke located in the closed region, information for recognizing the stroke is transmitted. The terminal device according to claim 8 or 9, characterized in that: The stroke information transmitting means includes
9. The terminal device according to claim 8, wherein the stroke recognizing unit transmits information for recognizing the stroke in a stroke forming a closed region when recognizing a coding pattern of a predetermined area. . The stroke information transmitting means includes
The terminal device according to any one of claims 8 to 11, wherein information for recognizing a stroke written within a predetermined time within a stroke forming a closed region is transmitted.   When the stroke information transmitting unit transmits information for recognizing the stroke, the stroke information transmitting unit further includes a sound output unit for performing a sound output for notifying that the information for recognizing the stroke is transmitted. The terminal device according to any one of claims 8 to 11. When the closed region determination means determines that the stroke forms a closed region, the device further comprises character recognition means for recognizing characters composed of strokes located in the closed region,
The terminal device according to any one of claims 8 to 12, wherein the stroke information transmitting unit transmits a character code recognized by the character recognizing unit as information for recognizing the stroke. . A program executed by an electronic pen,
Entry information generating means for reading the coded pattern and generating entry information relating to the handwritten stroke;
Stroke recognition means for recognizing a stroke based on the entry information;
Closed region determination means for determining whether or not the stroke recognized by the stroke recognition means forms a closed region;
When the closed region determination unit determines that the stroke forms a closed region, the stroke for recognizing the stroke among the strokes recognized by the stroke recognition unit is located in the closed region. A program for causing the electronic pen to function as stroke information transmitting means for transmitting information to a receiving device. A program executed by a terminal device,
Entry information receiving means for receiving the entry information from an electronic pen that reads an encoded pattern and generates entry information relating to a handwritten stroke;
Stroke recognition means for recognizing a stroke based on the entry information;
Closed region determination means for determining whether or not the stroke recognized by the stroke recognition means forms a closed region;
When the closed region determination unit determines that the stroke forms a closed region, the stroke for recognizing the stroke among the strokes recognized by the stroke recognition unit is located in the closed region. A program for causing the terminal device to function as stroke information transmitting means for transmitting information to a receiving device. The stroke information transmitting means includes
After the closed region determining means determines that the stroke forms a closed region, the stroke recognizing unit further recognizes a stroke indicating a predetermined mark which is overwritten on the stroke forming the closed region. The program according to claim 14 or 15, wherein in the case of the information, information for recognizing the stroke is transmitted. The stroke information transmitting means includes
When the closed region determination means determines that the stroke forms a closed region, and there is a predetermined amount or more of the stroke located in the closed region, information for recognizing the stroke is transmitted. The program according to any one of claims 14 to 16, wherein: The stroke information transmitting means includes
16. The information according to claim 14, wherein the stroke recognizing unit transmits information for recognizing the stroke in a stroke forming a closed region when recognizing a coding pattern of a predetermined area. program. The stroke information transmitting means includes
The program according to any one of claims 14 to 18, wherein information for recognizing a stroke written in a predetermined time within a stroke forming a closed region is transmitted.   When the stroke information transmitting means transmits information for recognizing the stroke, the electronic pen is further used as sound output means for performing sound output for notifying that the information for recognizing the stroke is transmitted. The program according to claim 14, wherein the program is made to function. When the closed region determining means determines that the stroke forms a closed region, the electronic pen is further functioned as a character recognizing unit for recognizing a character composed of a stroke located in the closed region,
15. The program according to claim 14, wherein the stroke information transmitting unit transmits a character code recognized by the character recognizing unit as information for recognizing the stroke.