JP2005157709A - Electronic pen system capable of arbitrary setting of writing destination - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic pen system which can computerize writing information and can be used through the use of a noncontact IC tag without consciousness of an entry destination and a writing location. <P>SOLUTION: On a writing object 4, two or more noncontact IC tags 3 are attached. By measuring a distance from each noncontact IC tag, the position of the electronic pen is defined, permitting the easy collection of written information into the electronic pen. The writing information can be collected without consciousness of the writing destination and the writing location, and it becomes easy to carry equipment for information collection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electronic pen input system, a position detection method, a position data collection method, and a computer-readable information recording medium on which a program for realizing the system is recorded.

  Conventionally, techniques for obtaining image information such as written characters and figures by collecting pen movement trajectories using ultrasonic waves and electromagnetic waves have been proposed. As described in Japanese Patent Application Laid-Open No. 2002-62978, the position information collection method in the electronic pen is based on the arrival time difference by transmitting electromagnetic waves or sound waves from the electronic pen and receiving signals with a plurality of receivers attached to the entry destination. Collected and triangulated to determine position.

  Alternatively, there is a technique (Japanese Patent Laid-Open No. 2003-256122) that adds information that can grasp the absolute position to the entry destination and collects the information with a camera at the electronic pen tip.

JP 2002-62978 A JP 2003-256122 A

  However, in the above method, in order to use the electronic pen, it is necessary to attach a device for receiving electromagnetic waves or sound waves to the entry destination, and it is necessary to always carry it with the electronic pen. In addition, it is not always necessary to carry a device that captures electronic information with an electronic pen that uses an address where the absolute position is written. However, an absolute position information is always required at the address, and no paper or information is added. There were problems that could not be used with things like blackboards and whiteboards.

  The object of the present invention is to use the communication with the non-contact IC tag for detecting the position of the electronic pen, and the electronic pen itself collects the position information through the communication with the non-contact IC tag. The purpose is to provide an electronic pen system that can ease restrictions such as the place of entry.

  In order to achieve the above object, in the present invention, input means for handwritten input and communication means between a plurality of non-contact IC tags, a response signal capable of identifying the plurality of non-contact IC tags, and a plurality of non-contact IC tags Electronic pen system comprising electronic data of response time of each tag by communication with, electronic data conversion means of input trajectory from electronic response time, electronic data communication means, 3 or more non-contact This is an electronic pen input system that detects the position of the electronic pen by calculating the distance from each non-contact IC tag from the response time difference from the IC tag and can use the entered information as electronic data.

  As the input means for handwriting input here, there is an input means that can be handwritten with a pen tip, and it is only necessary to use one suitable for the object to be filled in. If it is paper, it is a pen, and if it is a whiteboard An ink or the like may be used.

  The communication means with the non-contact IC tag only needs to transmit a radio signal for position detection from the electronic pen side and receive an individually identifiable signal returned from the non-contact IC tag.

  As a technique for returning the individual identification signal from the non-contact IC tag, there is a method as described in JP-A-2002-269517.

  Position detection by communication with non-contact IC tags can be determined by communicating with three or more non-contact IC tags and calculating the distance from the non-contact IC tag from the difference in response time with the non-contact IC tag. By repeating the above, the entry trajectory can be converted to electronic data.

  The position where the non-contact IC tag used for position detection is attached is not attached to the fixed position of the entry destination, but can be attached to any position where communication with the electronic pen can be performed by determining the reference point before entry. . A non-contact IC tag used for position detection is not used as it is, but may be attached to an entry object such as a seal, a tape, or a pin, or may be inserted in advance with paper or the like. The electronic data conversion means of the input locus from the non-contact IC tag response time does not need to be built in the pen body, and temporarily stores the electronic response time and sends it to the host device, so that the input locus can be obtained on the host device side. You may convert into electronic data.

  According to the present invention, communication with a non-contact IC tag is used for detecting the position of the electronic pen, and the electronic pen itself collects position information through communication with the non-contact IC tag, thereby making it easy to carry, It is possible to provide an electronic pen system that relaxes restrictions such as an entry place.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In addition, each figure used for the following description has shown roughly to such an extent that these inventions can be understood, and this invention is not limited only to a figure presentation example. Moreover, in each figure used for description, the same code | symbol is attached | subjected and shown about the same structural component, and the overlapping description may be abbreviate | omitted.

  An example of a configuration of an electronic pen system in an embodiment of the present invention will be described with reference to FIG.

  The electronic pen 1 has a general pen appearance or can be attached to an entry tool like a pen cap. It is possible to communicate with the non-contact IC tag 2 by the built-in radio wave transmission / reception function.

  The position of the electronic pen can be grasped by calculating the distance from the non-contact IC tag using the response time from each non-contact IC tag 2 when communicating with a plurality of non-contact IC tags.

  Further, the electronic pen 1 communicates with the host device to send entry result data and reproduce it on the host device side.

  FIG. 2 shows an example of the appearance and functions of the electronic pen 1 and the non-contact IC tag 2 shown in FIG.

  All processing of the electronic pen 1 is managed by the processing control unit 10.

  The power supply 11 has a storage battery function and can supply power to each circuit for a certain period of time without external power supply.

  The power supply information is sent to the processing control unit 10 and the remaining usable time can be confirmed.

  A signal generated by the reference signal generation unit 122 according to an instruction from the processing control unit 10 can be transmitted from the radio wave transmission unit 121 to the plurality of non-contact IC tags 2.

  In the non-contact IC tag 2, a signal is received by the radio wave receiving unit 23, and a radio wave power conversion unit 24 generates power to be used by the information storage unit 21, the control unit 22 and the radio wave transmission unit 25. The individual identification information stored in the information storage unit 21 is returned from the radio wave transmission unit 25 to the electronic pen.

  The electronic pen 1 receives the radio wave returned from the non-contact IC tag 2 by the radio wave receiving unit 123, grasps the individual ID of the non-contact IC tag by the time difference analyzing unit 131, and difference between the transmitted radio wave and the reference signal. The distance from a tag having an individual ID can be grasped.

  By grasping the distances from the plurality of non-contact IC tags, the distance calculator 132 can collect the current electronic pen position.

  The reference position is collected by the reference management unit 14 in the same manner as described above according to an instruction from the processing control unit 10.

  The subsequent trajectory information is stored in the information storage unit 15 as a relative position from the reference position.

  The information transmission / reception unit 16 can communicate with the information transmission / reception unit 31 of the host device 3 and transmit trajectory information to the host device.

  The entry confirmation unit 17 monitors the operation of the entry unit 18 and controls the communication with respect to the non-contact IC tag 2 by sending information on whether or not the entry has actually been made to the processing control unit 10.

  The entry unit 18 has a function of actually drawing a figure on the entry target as handwriting. The entry unit 18 is not only incorporated in the electronic pen 1 itself but also attached to a writing instrument having no electronic pen function to collect locus information. May be.

  With reference to FIG. 3, an example of the position detection method and the non-contact IC tag 2 attachment method will be described.

First, an arbitrary point on the entry object 4 is set as a reference point (0, 0) by the following procedure.
(1) The reply from the non-contact IC tags 201, 202, 203 is received by the radio wave transmitted from the electronic pen 1.
(2) The distance (a, b, c) is calculated from the reply time difference from each non-contact IC tag.
(3) A point having a distance (a, b, c) from each tag is set as a reference point (0, 0).

Next, a method of collecting the movement locus information (x, y) of the electronic pen will be described below. (4) Replies from a plurality of non-contact IC tags 201, 202, and 203 are received by radio waves transmitted from the electronic pen 1.
(5) The distance (a1, b1, c1) is calculated from the reply time difference from each non-contact IC tag.
(6) A point having a difference (a1−a), (b1−b), (c1−c) in the distance from the reference point (0, 0) is set.
(7) Similarly, the movement trajectory can be grasped by calculating the distances (a2, b2, c2), (a3, b3, c3).

  In the present invention, since the distance from the non-contact IC tag is used to determine the position of the electronic pen in the present invention, it can be detected at a relative position from the reference point first, so that it is necessary to fix the non-contact IC tag 2 without contact. However, there is no need to determine the mounting position, as long as it can be mounted at any position.

It is a block diagram showing the structure of the Example of this invention. It is an external appearance and function example of an electronic pen, a non-contact IC tag, and a host device. It is a figure which shows the method of a position detection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electronic pen, 10 ... Processing control part, 11 ... Power supply part, 12 ... Position information collection part, 121 ... Radio wave transmission part, 122 ... Reference signal generation part, 123 ... Radio wave reception part, 13 ... Position analysis part, 131 ... Time difference analysis unit, 132 ... distance calculation unit, 14 ... reference management unit, 15 ... information storage unit, 16 ... information transmission / reception unit, 17 ... entry confirmation unit, 18 ... entry unit, 2 ... non-contact IC tag, 21 ... information storage , 22 ... control unit, 23 ... radio wave reception unit, 24 ... radio wave power conversion unit, 25 ... radio wave transmission unit, 201 ... non-contact IC tag a, 202 ... non-contact IC tag b, 203 ... non-contact IC tag c, 3 ... Host device, 31 ... Information transmission / reception unit, 4 ... Object to be filled in.

Claims (3)

  Communication means between input means for handwritten input and a plurality of non-contact IC tags, response signal capable of identifying a plurality of non-contact IC tags, electronic data of response time of each tag by communication with a plurality of non-contact IC tags In an electronic pen system including an electronic response time, an electronic data conversion means of an input trajectory from an electronic response time, and a host device and an electronic data communication means, the electronic pen position is detected by a response time difference from a plurality of non-contact IC tags An electronic pen input system characterized by that.   Communication means between input means for handwritten input and a plurality of non-contact IC tags, response signal capable of identifying a plurality of non-contact IC tags, electronic data of response time of each tag by communication with a plurality of non-contact IC tags Electronic pen input system characterized in that a plurality of non-contact IC tag mounting methods are provided in the electronic pen system including the conversion means, the electronic data conversion means of the input trajectory from the electronic response time, and the host device and the electronic data communication means . Communication means between input means for handwritten input and a plurality of non-contact IC tags, response signal capable of identifying a plurality of non-contact IC tags, electronic data of response time of each tag by communication with a plurality of non-contact IC tags In an electronic pen system comprising an electronic response time from an electronic response time, an electronic trajectory conversion means, a host machine and an electronic data communication means, the initial position of the electronic pen is detected and the entry trajectory is relative to the initial position. An electronic pen system that reproduces the position.

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