JP2005178219A - Electronic blackboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic blackboard, which requires no complicated wiring and has a simple constitution. <P>SOLUTION: A large number of depressing detectors 11 are distributingly arranged in a board 10. A pair of a sensor 110 and a wireless tag 111 are employed as the depressing detector 11. When the sensor 110 detects the depression of a place depressed with a writing utensil in the board, a depressing signal is wirelessly transmitted by the wireless tag 111. Further, locus formers 13 are provided in the frame part 12 of the board so as to receive the depressing signal in order to form a locus signal and to output it through an external I/F 13a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electronic blackboard that generates and outputs a trajectory signal representing a trajectory of a writing instrument moving on a board.

  There is what is called an electronic blackboard that generates and outputs a trajectory signal representing the trajectory of a writing instrument moving on a board. The electronic blackboard has the same function as the blackboard on the assumption that it will be used in meetings attended by a large number of people. The copying function and the trajectory signal representing the trajectory drawn on the blackboard are called personal computers (hereinafter referred to as PCs). ) Etc. are often equipped with a function to output. The function similar to the blackboard here is a function to make all the attendees visually recognize the trace drawn on the board, and the trace can be drawn on the board using writing tools, and erased with the blackboard eraser It refers to the function that can be performed.

  In manufacturing such an electronic blackboard, there may be a case where a small touch panel having a similar function is applied using an optical sensor. However, when a chalk is used as a writing instrument, the optical sensor that performs coordinate detection is blocked by the scattered chalk powder regardless of the locus, and the correct position of the writing instrument may not be detected. Although it is conceivable to use a pressure sensor in consideration of such a case, an electronic blackboard requires a larger board than a touch panel, so the number of parts increases even if it is an optical sensor or a pressure sensor. There is a problem that wiring in the board becomes complicated. In addition, some coils are arranged along the X-axis and the Y-axis (see, for example, Patent Document 1). However, as the board becomes larger, there is a problem that wiring becomes complicated.

In addition, there is an electronic blackboard that can convert the locus written on the board into data by reading the locus written on the board by a scanner in order to simplify the wiring (see, for example, Patent Document 2). However, a camera and a scanner are required, and the drive unit that constitutes the scanner and the data generation unit that converts the locus written on the board into data are required, which complicates the configuration of the electronic blackboard. There is.
JP 2001-56737 A JP-A-8-108689

  In view of the above circumstances, an object of the present invention is to provide an electronic blackboard having a simple configuration without requiring complicated wiring.

The electronic blackboard of the present invention that achieves the above object is an electronic blackboard that generates and outputs a trajectory signal representing a trajectory of a writing instrument moving on a board,
A pair of a sensor that detects the pressing of the portion of the board by the writing instrument and a wireless tag that wirelessly transmits a pressing signal representing the pressing of the portion of the board detected by the sensor. A plurality of pressure detectors distributed in a dimensionally distributed manner;
And a trajectory generator that receives the press signals wirelessly transmitted from the plurality of press detectors and generates the trajectory signal.

  According to the electronic blackboard of the present invention, wiring inside the board is omitted by using the press detector composed of a pair of the sensor and the wireless tag. As a result, an electronic blackboard with a simple configuration is realized. Further, when an I / F that outputs the trajectory signal generated by the trajectory generator to the outside is provided, for example, an image based on the output trajectory signal is displayed on the display screen on a personal computer having a display screen (hereinafter referred to as a PC). And various image processing can be performed on the PC side.

Here, a frame portion surrounding the board is provided,
It is preferable that the locus generation unit is provided in the frame portion.

  Then, the trajectory signal generated by the trajectory generation unit can be output from the frame unit to the outside, and an excellent interface function with a PC or the like is realized.

In addition, a blackboard eraser that erases the trajectory written on the board by the writing instrument,
The blackboard eraser comprises a press detector comprising a pair of a wireless tag for wirelessly transmitting a press signal representing a press detected by the sensor and a sensor for detecting that the blackboard eraser is pressed on the board,
The trajectory generator generates the trajectory signal and generates an erasure signal representing a trajectory obtained by erasing the trajectory on the board written by the writing instrument based on a pressing signal wirelessly transmitted from the blackboard eraser. It is preferable.

  Thus, when the erase signal is transmitted from the blackboard eraser, the erase signal is added to the signal generated by the trajectory generator. Then, it is clearly shown on the PC side that the trajectory written by the writing tool is not written on the board by the above-mentioned writing tool but erased by the blackboard eraser.

Furthermore, a holder is provided according to the type of the writing instrument, and a holder is provided for drawing a locus on the board of the writing instrument with the writing instrument attached thereto,
The trajectory generator is provided in the holder, and the holder further detects a pressure from the board when a writing instrument attached to the holder presses the board, and a trajectory provided in the holder. A wireless transmitter that wirelessly transmits the trajectory signal generated by the generator to the outside,
Preferably, the wireless transmitter wirelessly transmits the locus signal generated by the locus generator together with the holder ID to the outside upon detection of the pressure by a sensor provided in the holder.

  As described above, when the wireless transmitter is provided in the holder as an I / F with the PC side, when the locus is written on the board by the writing instrument attached to the holder, the sensor in the holder Upon receipt of the pressure detection, the locus signal generated by the locus generation unit is wirelessly transmitted by the wireless transmitter together with the ID of the holder. If there is specific information such as the color of the writing instrument or the thickness of the line in this ID, the trajectory can be reproduced on the display screen based on the specific information on the PC side. In addition, the trajectory signal can be recorded on the recording medium together with the unique information.

   As described above, an electronic blackboard that does not require complicated wiring is realized.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an appearance of an electronic blackboard that is one embodiment of the present invention.

  FIG. 1 shows an example where the electronic blackboard 1 and the PC 2 are connected.

  As shown in FIG. 1, the electronic blackboard 1 has a sensor for detecting the pressing of the part of the board 10 by a writing tool such as a chalk or a blackboard eraser, and a pressing signal indicating the pressing of the part of the board 10 detected by the sensor. A plurality of press detectors 11 that are distributed in a two-dimensional manner are built in the board, which is a pair with a wireless tag for wireless transmission. FIG. 1 shows a plurality of dotted lines along the X axis (hereinafter referred to as X line) and a plurality of dotted lines along the Y axis (hereinafter referred to as Y line), and the intersection of the X line and the Y line. A state in which the pressure detector 11 is provided for each is shown. In addition, a plurality of track generators 13 that receive a press signal wirelessly transmitted from any one of these press detectors 11 and generate a track signal are provided in the frame portion surrounding the board, here eight. ing. The trajectory signals output from the plurality of trajectory generators 13 are integrated by the interface unit 13a and output to the PC 2 side through the cable 13b.

  In FIG. 1, when the word “ai” is written on the board 10 by chalk, a trajectory is generated in which the pressing signal is wirelessly transmitted from any one of the pressing detectors 11 distributed and arranged in the board 12. An example of the case where the character “ai” is displayed on the display screen of the PC 2 when the trajectory signal is output to the PC via the output I / F 13 a after being received by any of the devices 13 is shown. Yes. When the character “AI” is displayed, a locus signal read in the PC 2 when the character “AI” is written is recorded as data on a recording medium in the PC 2. Here, it is assumed that the specification indicating the data format of the trajectory signal output from the electronic blackboard 1 is handed over to the user in advance and the application software is created on the user side.

  FIGS. 1B and 1C are cross-sectional views showing the internal configuration of the board 10.

  FIG. 1 (b) shows a state in which the locus is written on the board by the writing tool, and FIG. 1 (c) shows a state in which the locus written on the board by the writing tool is erased by erasing the blackboard. Has been.

  In FIG. 1B and FIG. 1C, the sensor 110 that detects the pressing of the board 10 by a writing instrument such as chalk or a blackboard eraser, and the pressing of the board 10 detected by the sensor 110 are shown. A part of the plurality of press detection units 11 formed of a pair with a wireless tag 111 that wirelessly transmits a pressing signal to be expressed is extracted and shown. The sensor 110 that detects the pressing of the part of the board 10 by the writing instrument is disposed on the front surface side of the board 10, and the wireless tag 111 is disposed in a pair on the back surface side of the sensor 110. When any one of the sensors 110 detects pressing of the board 10 by the chalk 30 or the blackboard eraser 14, a pressing signal is wirelessly transmitted from the wireless tag 111 paired with the sensor 110. The wirelessly transmitted pressing signal is received by any of the trajectory generators 13 in the frame portion 12 of the board 10. The trajectory generation unit 13 performs processing for sequentially detecting the pressure signals and converting them into trajectory signals composed of time series.

  Further, the blackboard eraser 14 shown in FIG. 1C includes a pair of a sensor 141 that detects that the board has been pressed and a wireless tag 142 that wirelessly transmits a pressing signal that indicates the pressing detected by the sensor 141. A pressure detector 140 is provided. When the trajectory written on the board 10 is erased by the blackboard eraser 14, a pressing signal is received by one of the trajectory generating units 13 arranged in the frame portion 12, and a trajectory signal is generated. A pressing signal wirelessly transmitted from the blackboard eraser 14 by the locus generating unit 13 is also received and an erasing signal is generated.

  Here, how the pressure signal is wirelessly transmitted by the pressure detectors 11 that are two-dimensionally distributed and deployed will be described with reference to FIG.

  FIG. 2 is a diagram in which a part of the press detector 11 that is two-dimensionally distributed and distributed is extracted.

  2A shows an arrangement of the press detectors 11 distributed along the X line and the Y line, and FIG. 2B schematically shows the arrangement of the press detectors 11. The depicted figure is shown. The intersection of the X line and the Y line shown in FIG. 2A, that is, the position of the pressure detector 11 corresponds to 1 枡 1 枡 shown in FIG. 2B, and is shown on the horizontal axis of FIG. The position of the pressure detector is shown by the X coordinate and the Y coordinate shown on the vertical axis of FIG.

  As shown in FIG. 2, the first position where a linear trajectory is drawn by the choke is a position corresponding to the Xt coordinate on the X line and a position corresponding to the Yt coordinate on the Y line. The sensor at this position becomes the location, and first, the X coordinate Xt is wirelessly transmitted as a pressing signal by the wireless tag, and then the Y coordinate Yt is wirelessly transmitted as a pressing signal by the wireless tag.

  In the example shown in FIG. 2B, first, a signal indicating Xt, a signal indicating Yt, and then a pressing signal such as Xt + 1 and Yt are sequentially transmitted by radio. The trajectory generator 13 shown in FIG. 1 sequentially receives the pressing signals, replaces them with time-series trajectory signals, and sequentially outputs them to the PC 2 via the output I / F 13a.

  In this way, the trajectory signal sequentially output from the electronic blackboard 1 is received by the PC 2 and the trajectory based on the trajectory signal is displayed on the display screen of the PC 2. On the PC 2 side, not only the trajectory is displayed based on the trajectory signal, but the trajectory signal is sequentially recorded on the recording medium.

  2 is deleted by the blackboard eraser 14, a pressing signal is wirelessly transmitted by the wireless tag 111 paired with the sensor 110 that detects the pressing, and the locus generator 13 When received, the pressing signal from the blackboard eraser 14 is also received by the locus generation unit, and an erasure signal is generated by the locus generation unit 13 together with the locus signal. This erase signal may be anything as long as it is recognized by the PC. For example, when the initial letter ER of the eraser is wirelessly transmitted, the PC will receive the ER at the position indicated by the locus signal received. It is recognized that a trajectory is to be deleted.

  In this way, the electronic blackboard 1 having the function of the blackboard eraser 14 that does not need to be wired simply by distributing and disposing the pressure detectors consisting of pairs of sensors and wireless tags 111 in two dimensions is realized. .

  FIG. 3 is a flowchart showing a procedure of processing performed in the electronic blackboard 1.

  In step S301, the pressure of the X line is first detected by the pressure detector 13 and wirelessly transmitted by the wireless tag. In the next step S302, the pressure of the Y line is detected and wirelessly transmitted by the wireless tag.

  In step S303, when the pressing signals for the X line and the Y line are received by the locus generation unit 13, the process proceeds to next step S304, and the coordinates of the sensor at the position where the pressure is detected are detected. These coordinates are output as a trajectory signal to the PC 2 via the output I / F 13a.

  FIG. 4 is a diagram showing another embodiment.

  4A is a diagram showing the relationship among the electronic blackboard 1, the chalk 30 and the holder 15, and FIG. 4B shows a locus on the board 10 by the chalk 30 mounted on the holder 15. FIG. A sectional view of the electronic blackboard cut at the position of the chalk 30 when is written is shown.

  In the example shown in FIG. 4A, in order to reduce the number of components in the board 10 and eliminate the need for wiring, only the wireless tag 111 is provided in the board, and the locus generation unit 152 is provided in the holder 15. An example is shown. In this example, an example in which a contact sensor is used as the wireless tag 111 is shown, and wireless transmission by the wireless tag is performed only between the wireless tag 111 and the holder. If it is a proximity type wireless tag, a sensor may be provided in the board 10, and in that case, when the sensor detects the pressing of the location, the pressing signal transmitted wirelessly by the wireless tag 111 is sent to the holder. What is necessary is just to put it so that it may be received by the locus | trajectory generation part 152.

  This holder 15 is prepared according to the type of writing instrument, and is used for drawing a trace on the board with the writing instrument in which the writing instrument is mounted. A trace generator 152 is provided in the holder 15, and 15 is a writing instrument attached to the holder 15, here a sensor 151 that detects the pressure from the board 10 when the choke 30 presses the board 10, and a trajectory generator 152 provided in the holder 15. And a wireless transmitter 153 that wirelessly transmits the locus signal to the outside. The wireless transmitter 153 wirelessly transmits the trajectory signal generated by the trajectory generator 152 to the outside together with the ID of the holder 15 upon detection of pressure by the sensor 151 provided in the holder 15. The wirelessly transmitted trajectory signal is received by the receiving adapter 21 on the PC side, and the signal received by the receiving adapter 21 is demodulated and input to the PC.

  FIG. 5 is a block diagram showing the internal structure of the holder 15. In FIG. 5, the radio tag 111 inside the board, the holder 15 having the trajectory generator 152 that receives a press signal transmitted by radio from the radio tag 111, and the trajectory signal by radio transmission from the radio transmission unit 153 of the holder 15. PC2 on the side to which is transmitted.

  As shown in FIG. 5, when the locus is written on the board 10 by the choke 30 attached to the holder 15, the sensor 151 in the holder 15 detects the pressure from the board 10 and is received by the locus generator. A trajectory signal is generated based on the pressed signal, and the trajectory signal is sequentially wirelessly transmitted to the PC 2 together with the holder ID by the wireless transmission unit 153. A signal specific to the holder is transmitted to the PC side by embedding data indicating the color or information indicating the thickness of the line in the ID of the holder.

  With such a configuration, the sensor on the electronic blackboard side becomes unnecessary, and wiring inside the board is further simplified. Also, the color and thickness of the trajectory written on the board is wirelessly transmitted to the PC side as an ID, and becomes effective information for reproducing the trajectory on the board on the PC side.

  By the way, in recent years, integration of memories and coil parts has progressed, and miniaturization of wireless tags has progressed. In the future, the wireless tag will be downsized to the size of dust. In that case, the wireless tag can be mixed in the paint, and the paint can be applied and distributed.

  FIG. 6 is a diagram showing an application example conceivable in that case.

  FIG. 6A is a front view of the board of the electronic blackboard, and FIG. 6B is a sectional view of the board.

  6A and 6B schematically show a state after the wireless tag 102 is mixed in the paint 101 and the surface of the board 100 is applied by the paint 101 in which the wireless tag 102 is mixed. . A wireless tag 102 is randomly distributed as shown in FIG. 6A, and is distributed with a paint on the surface of the board 100 as shown in FIG. 6B.

  Even if the board is provided with a frame portion as shown in FIG. 1 and a trajectory generator is provided in the frame portion, a similar function is achieved even if a trajectory generator is provided in the holder as shown in FIG.

  By doing so, the electronic blackboard 100 that does not require any wiring in the board and is easy to assemble is realized.

  However, in the example of FIG. 6, the wireless tags are not regularly arranged two-dimensionally as shown in FIG. 1, and therefore data indicating the positions of the wireless tags 102 distributed by the scanner 200 is read. It is necessary to convert it into data and provide it to the user as the specification value of the electronic blackboard. This clearly indicates to the user what the trajectory signal is output from the electronic blackboard 100, which is an effective clue when creating application software on the PC side.

It is a figure which shows the external appearance of the electronic blackboard which is one Embodiment of this invention. It is the figure which extracted a part of press detector 11 distributed and distributed two-dimensionally. It is a flowchart which shows the procedure of the process performed within an electronic blackboard. It is a figure which shows another embodiment. FIG. 3 is a block diagram showing the configuration inside a holder 15. It is a figure which shows an application example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic blackboard 10 Board 11 Press detector 110 Sensor 111 Wireless tag 12 Frame part 13 Trajectory generator 14 Blackboard eraser 140 Press detector 141 Sensor 142 Wireless tag 15 Holder 151 Sensor 152 Trajectory generator 153 Wireless transmission part 2 PC
21 Receiving adapter

Claims (4)

In the electronic blackboard that generates and outputs a trajectory signal representing the trajectory of the writing instrument moving on the board,
A pair of a sensor that detects the pressing of the portion of the board by the writing instrument and a wireless tag that wirelessly transmits a pressing signal representing the pressing of the portion of the board detected by the sensor. A plurality of pressure detectors distributed in a dimensionally distributed manner;
An electronic blackboard comprising: a trajectory generator that receives the press signals wirelessly transmitted from the plurality of press detectors and generates the trajectory signal. Comprising a frame surrounding the board;
The electronic blackboard according to claim 1, wherein the locus generation unit is provided in the frame portion. A blackboard eraser that erases the locus written on the board by the writing instrument,
The blackboard eraser includes a press detector comprising a pair of a sensor that detects that the blackboard eraser is pressed on the board and a wireless tag that wirelessly transmits a press signal indicating the press detected by the sensor. ,
The trajectory generator generates the trajectory signal and generates an erasure signal representing a trajectory obtained by erasing the trajectory on the board written by the writing instrument based on a pressing signal wirelessly transmitted from the blackboard eraser. The electronic blackboard according to claim 1, wherein the electronic blackboard is a thing. Provided according to the type of the writing instrument, comprising a holder for the purpose of drawing a locus on the board writing instrument in a state in which the writing instrument is mounted,
The trajectory generator is provided in the holder, and the holder further detects a pressure from the board when a writing instrument attached to the holder presses the board, and a trajectory provided in the holder. A wireless transmitter that wirelessly transmits the trajectory signal generated by the generator to the outside,
The wireless transmitter wirelessly transmits a trajectory signal generated by the trajectory generator to the outside together with an ID of the holder upon detection of the pressure by a sensor provided in the holder. The electronic blackboard according to claim 1.

Images