Patent Publication Number: US-2010110007-A1

Title: Input system and method, and computer program

Description:
TECHNICAL FIELD 
     The present invention relates to an input system and method which can be used as an electronic whiteboard, an electronic blackboard, or the like used at a conference room or the like, and a computer program which can make a computer function as such an input system. 
     BACKGROUND ART 
     In recent years, instead of a whiteboard conventionally used in conference or the like, an input system referred to as an electronic whiteboard or an electronic blackboard has been increasingly introduced. In such an input system, a pen-type indicating apparatus is used to make a tracing on a display surface of a display apparatus, such as a plasma display, and to perform a drawing process according to the traced trajectory (e.g. a process of displaying the trajectory so as to be visually recognized), which allows the pen-type indicator to be used like a magic marker or the like (refer to a patent document 1). By this, a user can use the input system, such as an electronic whiteboard, feeling extremely similar to the conventionally used whiteboard. 
     Patent document 1: Japanese Patent Application Laid Open No. Hei 7-319615 
     DISCLOSURE OF INVENTION 
     Subject to be Solved by the Invention 
     However, for example, in the input system disclosed in the patent document 1, the position detection (e.g. detection of the traced trajectory) of the indicating apparatus (or indicating device) is performed in an electromagnetic induction method using a loop antenna group. Here, an electromagnetic wave used in the electromagnetic induction method does not have directivity. Thus, if a plurality of display apparatuses (input devices) are aligned, although the indicating apparatus is actually displaced on a certain display apparatus, it is falsely recognized that the indicating apparatus is displaced on the adjacent display apparatus, which is technically problematic. In other words, there is such a technical problem that an indication on the certain display apparatus may have an adverse effect on the adjacent display apparatus. Thus, for example, in the input system disclosed in the patent document 1, it is hardly possible to dispose the plurality of display apparatuses. 
     In view of the aforementioned problems, it is therefore an object of the present invention to provide, for example, an input system and method which can preferably perform the input associated with the drawing process or the like on the plurality of display apparatuses by using the plurality of indicating apparatuses, and a computer program which makes a computer function as such an input system. 
     Means for Solving the Subject 
     The above object of the present invention can be achieved by an input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses, each of the indicating apparatuses provided with (i) a detecting device for detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting device for transmitting transmission information generated on the coordinate information included in the image detected by the detecting device; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses, the control apparatus provided with (i) a receiving device for receiving the transmission information transmitted by the transmitting device, (ii) a generating device for generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling device for controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating device. 
     The above object of the present invention can be also achieved by an input method in an input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses (in other words, the aforementioned embodiment of the input system of the present invention (including its various aspects)), the input method provided with: (i) a detecting process of detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting process of transmitting transmission information generated on the coordinate information included in the image detected by the detecting process, which are performed on each of the indicating apparatuses; and (i) a receiving process of receiving the transmission information transmitted by the transmitting process, (ii) a generating process of generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling process of controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating process, which are performed on the control apparatus. 
     The above object of the present invention can be also achieved by a computer program for controlling a computer provided for input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses, each of the indicating apparatuses provided with (i) a detecting device for detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting device for transmitting transmission information generated on the coordinate information included in the image detected by the detecting device; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses, the control apparatus provided with (i) a receiving device for receiving the transmission information transmitted by the transmitting device, (ii) a generating device for generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling device for controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating device (in other words, the aforementioned embodiment of the input system of the present invention (including its various aspects)), the computer program making the computer function as at least one portion of the plurality of indicating apparatuses and the control apparatus. 
     These operation and other advantages of the present invention will become more apparent from the embodiments explained below. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a block diagram conceptually showing the basic structure of an input system in a first example. 
         FIG. 2  is a block diagram conceptually showing the basic structure of a display apparatus in the first example. 
         FIG. 3  is a block diagram conceptually showing the basic structure of a pen-type indicator in the first example. 
         FIG. 4  is a block diagram conceptually showing the basic structure of an application apparatus in the first example. 
         FIG. 5  is a flowchart conceptually showing a flow of the operations of the display apparatus in the first example. 
         FIG. 6  is a waveform chart conceptually showing 2000 pulses which constitute one frame image. 
         FIG. 7  is a schematic diagram conceptually showing a display aspect of a coordinate pattern image and image information obtained in a step S 101  in  FIG. 5 . 
         FIG. 8  is a flowchart conceptually showing a flow of the operations of the pen-type indicator in the first example. 
         FIG. 9  is a waveform chart showing a principle of an operation of detecting timing in which the coordinate pattern image is displayed on a display device and a block diagram conceptually showing the detailed structure of a coordinate information display synchronization sensor. 
         FIG. 10  is a flowchart conceptually showing a flow of the operations of the application apparatus in the first example. 
         FIG. 11  is a schematic diagram conceptually showing a drawing process, an integration process, and an image displayed as a result. 
         FIG. 12  is a block diagram conceptually showing the basic structure of an input system in a second example. 
         FIG. 13  is a block diagram conceptually showing the basic structure of a pen-type indicator in the second example. 
         FIG. 14  is a block diagram conceptually showing the basic structure of an application apparatus in the second example. 
         FIG. 15  is a flowchart conceptually showing a flow of the operations of the pen-type indicator in the second example. 
         FIG. 16  is a flowchart conceptually showing a flow of the operations of the application apparatus in the second example. 
         FIG. 17  is a schematic diagram conceptually showing a drawing process, an integration process, and an image displayed as a result in the second example. 
         FIG. 18  is a block diagram conceptually showing the basic structure of a pen-type indicator in a third example. 
         FIG. 19  is a block diagram conceptually showing the basic structure of an application apparatus in the third example. 
         FIG. 20  is a flowchart conceptually showing a flow of the operations of the pen-type indicator in the third example. 
         FIG. 21  is a flowchart conceptually showing a flow of the operations of the application apparatus in the third example. 
     
    
    
     DESCRIPTION OF REFERENCE CODES 
     
         
           1  input system 
           11  display apparatus 
           111  display unique coordinate information memory device 
           112  image information input device 
           113  pulse generation device 
           114  display device 
           12  pen-type indicator 
           121  sensing device 
           122  pen pressure sensor 
           123  coordinate information display synchronization sensor 
           1231  noise sensor 
           1232  noise signal waveform shaping circuit 
           124  image processing device 
           125  display apparatus specification/position detection device 
           126  display unique coordinate information memory device 
           127  transmission information integration device 
           128  wireless transmission device 
           129  pen unique ID information memory device 
           13  application apparatus 
           131  wireless reception device 
           132  input processing device 
           133  drawing processing device 
           134  integration processing device 
           135  image information output device 
       
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, as the best mode for carrying out the present invention, an explanation will be given on embodiments of the input system and method, and the computer program of the present invention. 
     (Embodiment of Input System) 
     An embodiment of the input system of the present invention is an input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses, each of the indicating apparatuses provided with (i) a detecting device for detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting device for transmitting transmission information generated on the coordinate information included in the image detected by the detecting device; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses, the control apparatus provided with (i) a receiving device for receiving the transmission information transmitted by the transmitting device, (ii) a generating device for generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling device for controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating device. 
     According to the embodiment of the input system of the present invention, the image including the coordinate information unique to each of the display apparatuses is displayed on the display surface of each of the plurality of display apparatuses. Here, with regard to the “image including the coordinate information”, the coordinate information is not necessarily always included in the image, and the coordinate information only needs to be included in at least one portion of the image, or at least one portion of a term or period in which one or a plurality of images are displayed. 
     The image including the coordinate information is detected (specifically, imaged) by the detecting device provided for each of the plurality of indicating apparatuses. At this time, since the image includes the coordinate information, each of the plurality of indicating apparatuses detects the information indicating the coordinate position on the display surface at which each of the indicating apparatuses is currently located. At this time, the coordinate information included in the detected image (i,e. the information indicating the coordinate position on the display surface at which each of the plurality of indicating apparatuses is currently located) is transmitted to the control apparatus as the transmission information which is generated by performing a predetermined arithmetic process (for example, a process of actually specifying the coordinate position or the like described later) on the coordinate information, or which is the coordinate information itself, by the operation of the transmitting device. 
     On the control apparatus, the transmission information is received by the operation of the receiving device. The received transmission information includes the coordinate position itself on the display surface at which each of the plurality of indicating apparatuses is currently located or the information indicating the coordinate position. Moreover, the coordinate information is unique to each of the plurality of display apparatuses. Thus, the generating device can specify at which position on the display surface each of the plurality of indicating apparatuses is located, on the basis of the received transmission information. Therefore, the drawing information indicating the trajectory that each of the plurality of indicating apparatuses is displaced on the display surface is generated by the operation of the generating device. Then, each of the plurality of display apparatuses is controlled to perform the drawing process according to the generated drawing information, by the operation of the controlling device. Specifically, for example, each of the plurality of display apparatuses is controlled to display the trajectory indicated by the drawing information in a visually recognizable state. 
     Thus, a user can draw a desired letter or character, graphic, and the like on the desired one of the plurality of display apparatuses by using the input system in the embodiment, feeling extremely similar to the conventionally used whiteboard. 
     In the embodiment, in particular, the image displayed on the display surface of each of the plurality of display apparatuses includes the coordinate information, and the coordinate position of each of the plurality of indicating apparatuses on the display surface (i.e. each of the trajectories formed by the plurality of indicating apparatuses being displaced on the display surface) is specified on the basis of the image detected by each of the plurality of indicating apparatuses. Thus, it is possible to specify the coordinate position on the display surface of each of the plurality of indicating apparatuses without interference from the adjacent display apparatus. Specifically, for example, as long as one indicating apparatus is displaced on the display surface of one display apparatus, the displacement of the one indicating apparatus does not have an adverse effect on another display apparatus, and moreover, the presence of this another display apparatus does not have an adverse effect on the specification of the coordinate position of the one indicating apparatus. By this, even if the plurality of display apparatuses are arranged, a user can draw the desired letter or character, graphic, and the like on the desired display apparatus of the plurality of display apparatuses, by using the plurality of indicating apparatuses without a particular inconvenience. 
     In one aspect of the embodiment of the input system of the present invention, one of the plurality of indicating apparatus is further provided with a specifying device for specifying one of the display apparatuses to which the one indicating apparatus gives an indication and specifying the coordinate position at which the one indicating apparatus is located on the display surface of the specified display apparatus, on the basis of the coordinate information included in the image detected by the detecting device, and the transmitting device transmits each of the display apparatus and the coordinate position specified by the specifying device, as the transmission information. 
     According to this aspect, each of the plurality of indicating apparatuses can specify at which position on the display surface of which display apparatus each of the indicating apparatuses is located. Therefore, on the control apparatus, it is possible to perform the aforementioned various operations (specifically, the generation of the drawing information and the like), relatively easily, on the basis of a result of the specification on each of the plurality of indicating apparatuses. 
     In another aspect of the embodiment of the input system of the present invention, the generating device is further provided with a specifying device for specifying one of the display apparatuses to which at least one of the indicating apparatuses gives an indication and specifying the coordinate position at which the at least one indicating apparatus is located on the display surface of the specified display apparatus, on the basis of the transmission information transmitted from the transmitting device. 
     According to this aspect, it is possible to specify at which position on the display surface of which display apparatus each of the plurality of indicating apparatuses is located, on the control apparatus side. Therefore, as compared to the construction that each of the plurality of indicating apparatuses specifies at which position on the display surface of which display apparatus each of the plurality of indicating apparatuses is located, it is possible to simplify the structure of the control apparatus. This leads to a reduction in the power consumption and the manufacturing costs of the input system. In particular, as the input system is provided with more indicating apparatuses, there is a higher effect on the reduction in the power consumption and the manufacturing costs of the input system. 
     In another aspect of the embodiment of the input system of the present invention, the generating device generates the drawing information indicating the trajectory that each of the indicating apparatuses is displaced on the display surface of each of the display apparatuses, for each of the plurality of display apparatuses, as a plurality of layer information distinguished in accordance with time, and the controlling device controls each of the plurality of display apparatuses to perform the drawing process according to any one of, or at least two of, or an integrated result of all of the plurality of layer information. 
     According to this aspect, it is possible to perform the selective drawing process according to the displacement of each of the plurality of indicating apparatuses in a particular time zone. 
     In another aspect of the embodiment of the input system of the present invention, the generating device generates the drawing information indicating the trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, for each of the plurality of display apparatuses and for each of the indicating apparatuses. 
     According to this aspect, by specifying which of the plurality of indicating apparatus is located at which position on the display surface of which display apparatus, it is possible to generate the drawing information for each of the plurality of display apparatuses an for each of the plurality of indicating apparatuses. In this aspect, in particular, it is effective if each of the plurality of indicating apparatuses can be displayed on the display surface of any of the plurality of display apparatuses (for example, if the display apparatus and the indicating apparatus are not fixedly associated in a one-to-one manner, and they are variably associated, for example, in a one-to-many, many-to-one, or many-to-many manner. 
     In an aspect of the input system in which the drawing information is generated for each of the plurality of display apparatuses and for each of the plurality of indicating apparatuses, as described above, unique identification information for an indicating apparatus may be assigned to each of the plurality of indicating apparatuses, and the transmitting device may transmit the transmission information including each of the coordinate information and the identification information for an indicating apparatus. 
     By virtue of such construction, by referring to the identification information for an indicating apparatus, it is possible to specify which of the plurality of indicating apparatuses is located at which position on the display surface of which display apparatus, relatively easily. 
     In an aspect of the input system in which the drawing information is generated for each of the plurality of display apparatuses and for each of the plurality of indicating apparatuses, as described above, the generating device may generate the drawing information indicating the trajectory that each of the plurality of indicating apparatus is displaced on the display surface of each of the display apparatuses, for each of the plurality of display apparatuses, as a plurality of layer information distinguished for each of the plurality of indicating apparatuses, and the controlling device may control each of the display apparatuses to perform the drawing process according to any one of, or at least two of, or an integrated result of all of the plurality of layer information. 
     By virtue of such construction, it is possible to perform the selective drawing process according to the displacement of the desired one of the plurality of indicating apparatuses. 
     In another aspect of the embodiment of the input system of the present invention, each of the display apparatuses displays one image by emitting a plurality of pulses and displays the coordinate information on the display surface by using one portion of the plurality of pulses emitted in predetermined timing, and the detecting device detects the image in the predetermined timing in which the coordinate information is displayed on the display surface. 
     According to this aspect, the detecting device can preferably detect the image including the coordinate information. 
     In an aspect of the input system in which each of the display apparatuses displays one image by emitting a plurality of pulses and displays the coordinate information on the display surface by using one portion of the plurality of pulses emitted in predetermined timing, as described above, each of the display apparatuses may display the one image by emitting the plurality of pulses and display the coordinate information on the display surface by using the one portion of the plurality of pulses emitted in the predetermined timing. 
     By virtue of such construction, it is possible to include the coordinate information in the image without having an adverse effect on the image to be originally displayed. 
     In an aspect of the input system in which each of the display apparatuses displays one image by emitting a plurality of pulses and displays the coordinate information on the display surface by using one portion of the plurality of pulses emitted in predetermined timing, as described above, each of the plurality of indicating apparatuses may be further provided with a synchronizing device for detecting the predetermined timing in which the coordinate information is displayed on the display surface, and the detecting device may detect the image in the predetermined timing detected by the synchronizing device. 
     By virtue of such construction, the detecting device can preferably detect the image including the coordinate information, on the basis of the timing detected by the synchronizing device. 
     In an aspect of the input system in which each of the display apparatuses displays one image by emitting a plurality of pulses and displays the coordinate information on the display surface by using one portion of the plurality of pulses emitted in predetermined timing, as described above, each of the display apparatuses may display the one image by emitting the plurality of pulses and display the coordinate information on the display surface by using the one portion of the plurality of pulses emitted in initial timing, and the synchronizing device may detect the timing in which the coordinate information is displayed on the display surface by detecting a noise pulse emitted from the display surface (e.g. a noise pulse according to a reset pulse described later) between completion of the display of the one image and beginning of the display of an image to be displayed next to the one image. 
     By virtue of such construction, it is possible to include the coordinate information in the image, without having an adverse effect on the image to be originally displayed, and it is also possible to detect the timing in which the coordinate information is displayed, preferably and relatively easily. 
     (Embodiment of Input Method) 
     An embodiment of the input method of the present invention is an input method in an input system provided with; a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses (in other words, the aforementioned embodiment of the input system of the present invention (including its various aspects)), the input method provided with; (i) a detecting process of detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting process of transmitting transmission information generated on the coordinate information included in the image detected by the detecting process, which are performed on each of the indicating apparatuses; and (i) a receiving process of receiving the transmission information transmitted by the transmitting process, (ii) a generating process of generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling process of controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating process, which are performed on the control apparatus. 
     According to the embodiment of the input method of the present invention, it is possible to receive the same various benefits as those of the embodiment of the input system of the present invention described above. 
     Incidentally, in response to the various aspects in the embodiment of the input system of the present invention described above, the embodiment of the input method of the present invention can also adopt various aspects. 
     (Embodiment of Computer Program) 
     An embodiment of the computer program of the present invention is a computer program for controlling a computer provided for input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses, each of the indicating apparatuses provided with (i) a detecting device for detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting device for transmitting transmission information generated on the coordinate information included in the image detected by the detecting device; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses, the control apparatus provided with (i) a receiving device for receiving the transmission information transmitted by the transmitting device, (ii) a generating device for generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling device for controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating device (in other words, the aforementioned embodiment of the input system of the present invention (including its various aspects)), the computer program making the computer function as at least one portion of the plurality of indicating apparatuses and the control apparatus. 
     According to the embodiment of the computer program of the present invention, the aforementioned embodiment of the input system of the present invention can be embodied relatively readily, by loading the computer program from a recording medium for storing the computer program, such as a ROM, a 
     CD-ROM, a DVD-ROM, a hard disk or the like, into the computer, or by downloading the computer program, which may be a carrier wave, into the computer via a communication device. 
     Incidentally, in response to the various aspects of in the embodiment of the input system of the present invention described above, the embodiment of the computer program of the present invention can adopt various aspects. 
     (Embodiment of Computer Program Product) 
     An embodiment of the computer program product of the present invention is computer program product in a computer-readable medium for tangibly embodying a program of instructions which is executed by an input system provided with: a plurality of display apparatuses for displaying an image including coordinate information on a display surface, the coordinate information being unique to each of the display apparatuses, the coordinate information indicating a coordinate position on the display surface; a plurality of indicating apparatuses for giving an indication for performing a drawing process on at least one of the plurality of display apparatuses by being displaced on the display surface of at least one of the plurality of display apparatuses, each of the indicating apparatuses provided with (i) a detecting device for detecting the image display on the display surface of at least one of the plurality of display apparatuses and (ii) a transmitting device for transmitting transmission information generated on the coordinate information included in the image detected by the detecting device; and a control apparatus for controlling the drawing process with respect to each of the display apparatuses on the basis of the indication by each of the plurality of indicating apparatuses, the control apparatus provided with (i) a receiving device for receiving the transmission information transmitted by the transmitting device, (ii) a generating device for generating drawing information for each of the plurality of display apparatuses on the basis of the transmission information, the drawing information indicating a trajectory that each of the plurality of indicating apparatuses is displaced on the display surface of each of the display apparatuses, and (iii) a controlling device for controlling each of the display apparatuses to perform the drawing process according to the drawing information generated by the generating device (in other words, the aforementioned embodiment of the input system of the present invention (including its various aspects)), the computer program making the computer function as at least one portion of the plurality of indicating apparatuses and the control apparatus. 
     According to the embodiment of the computer program product of the present invention, the aforementioned embodiment of the input system of the present invention can be embodied relatively readily, by loading the computer program product from a recording medium for storing the computer program product, such as a ROM (Read Only Memory), a CD-ROM (Compact Disc—Read Only Memory), a DVD-ROM (DVD Read Only Memory), a hard disk or the like, into the computer, or by downloading the computer program product, which may be a carrier wave, into the computer via a communication device. More specifically, the computer program product may include computer readable codes to cause the computer (or may comprise computer readable instructions for causing the computer) to function as the aforementioned embodiment of the input system of the present invention. 
     Incidentally, in response to the various aspects in the aforementioned embodiment of the input system of the present invention, the embodiment of the computer program product of the present invention can also employ various aspects. 
     These operation and other advantages of the present invention will become more apparent from the examples explained below. 
     As explained above, according to the embodiment of the input system of the present invention, it is provided with the plurality of display apparatus; the plurality of indicating apparatuses provided with the detecting device and the transmitting device; and the control apparatus provided with the receiving device, the generating device, and the controlling device. According to the embodiment of the input method of the present invention, it is provided with the detecting process, the transmitting process, the receiving process, the generating process, and the controlling process. Therefore, it is possible to preferably perform the input associated with the drawing process or the like with respect to the plurality of display apparatuses, by using the plurality of indicating apparatuses. 
     Examples 
     Hereinafter, examples of the present invention will be described with reference to the drawings. 
     (1) First Example 
     Firstly, with reference to  FIG. 1  to  FIG. 11 , a first example of the input system of the present invention will be explained. 
     (1-1) Basic Structure 
     Firstly, with reference to  FIG. 1 , the basic structure of an input system  1  in the first example will be described.  FIG. 1  is a block diagram conceptually showing the basic structure of the input system  1  in the first example. 
     As shown in  FIG. 1 , the input system  1  in the first example is provided with a plurality of display apparatuses  11  (specifically, a display apparatus (# 1 )  11  (# 1 ) and a display apparatus (# 2 )  11  (# 2 )), a plurality of pen-type indicators  12  each of which corresponds to respective one of the plurality of display apparatuses  11  (specifically, a pen-type indicator (# 1 )  12  (# 1 ) corresponding to the display apparatus (# 1 )  11  (# 1 ) and a pen-type indicator (# 2 )  12  (# 2 ) corresponding to the display apparatus (# 2 )  11  (# 2 )), and an application apparatus  13 . 
     The display apparatus  11  constitutes one specific example of the “display apparatus” of the present invention, and it displays a desired image or the like. The display apparatus  11  emits 2000 pulses while changing their light-emitting time lengths, thereby displaying one image (i.e. one frame image). 
     Moreover, the display apparatus  11  also performs a display process (in other words, a drawing process) according to the displacement of the pen-type indicators  12  on a display device  114  (refer to  FIG. 2 ) of the display apparatus  11 . For example, the example shown in  FIG. 1  shows such a display aspect that the pen-type indicator (# 1 )  12  (# 1 ) is displaced to draw a letter of “A” on the display device  114  of the display apparatus  11  and such a display aspect that the pen-type indicator (# 2 )  12  (# 2 ) is displaced to draw a letter of “X” on the display device  114  of the display apparatus  11 . Incidentally, the display process in the display apparatus  11  is performed under the control of the application apparatus  13 . The display process will be detailed later. 
     The pen-type indicator  12  constitutes one specific example of the “indicating apparatus” of the present invention, and it is operated by a user to be displaced on the display device  114  of the display apparatus  11 . 
     The application apparatus  13  constitutes one specific example of the “control apparatus” of the present invention. The application apparatus  13  controls the display process of displaying the image on the display apparatus  11  and controls the display process according to the displacement of the pen-type indicator  12  on the display device  114  (refer to  FIG. 2 ) of the display apparatus  11 . 
     Next, with reference to  FIG. 2 , an explanation will be given on the basic structure of the display apparatus  11  provided for the input system  1  in the first example.  FIG. 2  is a block diagram conceptually showing the basic structure of the display apparatus  11  in the first example. Incidentally, since the display apparatus (# 1 )  11  (# 1 ) and the display apparatus (# 2 )  11  (# 2 ) described above have the same structure, they will be collectively explained as the display apparatus  11  hereinafter. 
     As shown in  FIG. 2 , the display apparatus  11  is provided with a display unique coordinate information memory device  111 , an image information input device  112 , a pulse generation device  113 , and a display device  114 . 
     The display unique coordinate information memory device  111  stores information indicating a coordinate position on the display device  114  unique to each display apparatus  11  (hereinafter referred to as “display unique coordinate information”, as occasion demands). The display unique coordinate information may indicate a coordinate position in every pixel, or a coordinate position in every block of several-pixels, dozen-pixels, or several-tens-pixels. Moreover, as the display unique coordinate information, for example, a pattern image such as a two-dimensional pattern (or a two-dimensional barcode) is listed as one example. Moreover, in order to make the display unique coordinate information unique to each display apparatus  11 , the display unique coordinate information may be generated on the basis of a unique ID of each display apparatus  11 . 
     The image information input device  112  receives the input of image information indicating the image to be displayed on the display device  114 , outputted from the application apparatus  13 . 
     The pulse generation device  113  generates the 2000 pulses for displaying the image indicated by the image information, in accordance with the image information inputted to the image information input device  112 . Moreover, the pulse generation device  113  generates first one or several of the 2000 pulses for displaying one frame image, in accordance with the display unique coordinate information stored in the display unique coordinate information memory device  111 . In other words, in the first example, the pattern image indicating the display unique coordinate information (hereinafter referred to as a “coordinate pattern image”, as occasion demands) is displayed by emitting the first one or several of the 2000 pulses for displaying one frame image, and the image according to the image information inputted to the image information input device  112  is displayed on the display device  114  by emitting the other pulses. 
     The display device  114  actually displays the image or the coordinate pattern image by driving the light-emitting elements or the like which constitute the pixels on the display device  114 , in accordance with the pulses generated on the pulse generation device  113 . 
     Next, with reference to  FIG. 3 , an explanation will be given on the basic structure of the pen-type indicator  12  provided for the input system  1  in the first example.  FIG. 3  is a block diagram conceptually showing the basic structure of the pen-type indicator  12  in the first example. Incidentally, since the pen-type indicator (# 1 )  12  (# 1 ) and the pen-type indicator (# 2 )  12  (# 2 ) described above have the same structure, they will be collectively explained as the pen-type indicator  12  hereinafter. 
     As shown in  FIG. 3 , the pen-type indicator  12  is provided with a sensing device  121 , a pen pressure sensor  122 , a coordinate information display synchronization sensor  123 , an image processing device  124 , a display apparatus specification/position detection device  125 , a display unique coordinate information memory device  126 , a transmission information integration device  127 , and a wireless transmission device  128 . 
     The sensing device  121  is disposed near the tip of the pen-type indicator  12  and detects the image displayed on the display device  114 . In particular, the sensing device  121  detects the coordinate pattern image out of the images displayed on the display device  114 . The detected coordinate pattern image is outputted to the image processing device  124 . 
     The pen pressure sensor  122  detects whether or not the distance between the pen-type indicator  12  and the display device  114  is a distance which allows the sensing device  122  to detect the image. More specifically, the pen pressure sensor  122  is a pressure sensor disposed on the tip of a predetermined structure extending from the vicinity of the tip of the pen-type indicator  12 . The predetermined structure has substantially the same length as the distance between the pen-type indicator  12  and the display device  114  which allows the sensing device  121  to detect the image. If the pen pressure sensor  122  does not detect a pressure, since the predetermined structure is not in contact with the display device  114 , it is possible to estimate that the distance between the pen-type indicator  12  and the display device  114  is longer than the distance which allows the sensing device  121  to detect the image. In this case, a pen pressure signal outputted from the pen pressure sensor  122  to the sensing device  121  is a signal indicating that the pressure is not detected, and the sensing device  121  does not detect the coordinate pattern image. On the other hand, if the pen pressure sensor  122  detects the pressure, since the predetermined structure is in contact with the display device  114 , it is possible to estimate that the distance between the pen-type indicator  12  and the display device  114  is the distance which allows the sensing device  121  to detect the image. In this case, the pen pressure signal outputted from the pen pressure sensor  122  to the sensing device  121  is a signal indicating that the pressure is detected, and the sensing device  121  detects the coordinate pattern image. 
     The coordinate information display synchronization sensor  123  detects timing in which the coordinate pattern image is displayed on the display device  114 . Moreover, the coordinate information display synchronization sensor  123  outputs a synchronization signal indicating the timing to the sensing device  121 . The sensing device  121  detects the coordinate pattern image when the timing in which the coordinate pattern image is displayed on the display device  114  is detected by the coordinate information display synchronization sensor  123 . On the other hand, the sensing device  121  does not detect the coordinate pattern image when the timing in which the coordinate pattern image is displayed on the display device  114  is not detected by the coordinate information display synchronization sensor  123 . 
     The image processing device  124  converts the coordinate pattern image detected on the sensing device  121  into a format easily processed at a subsequent stage of the image processing device  124 . Specifically, the image processing device  124  converts the coordinate pattern image detected on the sensing device  121  into, for example, digital data expressed by “ 0 ” and “I”. The coordinate pattern image converted into the digital data is outputted to the display apparatus specification/position detection device  125 . 
     The display apparatus specification/position detection device  125  specifies the display apparatus  11  on which the coordinate pattern image is detected, and it detects the coordinate position indicated by the coordinate pattern image, on the basis of the coordinate pattern image outputted from the image processing device  124 . On the pen-type indicator  12 , the same display unique coordinate information as the display unique coordinate information stored in the aforementioned display unique coordinate information memory device  111  is stored in the display unique coordinate information memory device  126 . In particular, the same display unique coordinate information as all the display unique coordinate information about the display apparatuses  11  which are operation targets of the respective pen-type indicators  12  is preferably stored in the display unique coordinate information memory device  126 . Thus, the display apparatus specification/position detection device  125  compares the display unique coordinate information stored in the display unique coordinate information memory device  126  and the coordinate pattern image outputted from the image processing device  124 , thereby specifying the display apparatus in which the coordinate pattern image is imaged and detecting the coordinate position indicated by the coordinate pattern image. Specifically, for example, if the coordinate pattern image is detected by the pen-type indicator (# 1 ) which is displaced on the display device  114  of the display apparatus  11  (# 1 ), the display apparatus specification/position detection device  125  specifies that the display apparatus  11  in which the coordinate pattern image is imaged is the display apparatus  11  (# 1 ), and it detects the coordinate position on the display device  114  of the display apparatus  11  (# 1 ) at which the pen-type indicator (# 1 ) is located when the coordinate pattern image is detected. 
     The transmission information integration device  127  generates transmission information (one specific example of the “transmission information” of the present invention) to transmit from the pen-type indicator to the application apparatus  13 . Specifically, the transmission information is generated by integrating the information indicating the coordinate position and the display apparatus specified on the display apparatus specification/position detection device  125 . 
     The wireless transmission device  128  transmits the transmission information generated on the transmission information integration device  127 , to the application apparatus  13  by using a wireless communicating device, such as infrared rays. 
     Incidentally, the sensing device  121  and the image processing device  124  constitute one specific example of the “detecting device” of the present invention. The coordinate information display synchronization sensor  123  constitutes one specific example of the “synchronizing device” of the present invention. The display apparatus specification/position detection device  125  constitutes one specific example of the “specifying device” of the present invention. The transmission information integration device  127  and the wireless transmission device  128  constitute one specific example of the “transmitting device” of the present invention. 
     Next, with reference to  FIG. 4 , an explanation will be given on the basic structure of the application apparatus  13  provided for the input system  1  in the first example.  FIG. 4  is a block diagram conceptually showing the basic structure of the application apparatus  13  in the first example. 
     As shown in  FIG. 4 , the application apparatus  13  is provided with a wireless reception device  131 , an input processing device  132 , a drawing processing device  133 , an integration processing device  134 , and an image information output device  135 . 
     The wireless reception device  131  receives the transmission information transmitted from the wireless transmission device  128 . 
     The input processing device  132  separates the transmission information received on the wireless reception device  131  for each display apparatus  11  and outputs it to the drawing processing device  133 . 
     The drawing processing device  133  generates drawing information for performing the drawing process at the coordinate position with respect to each display apparatus  11 , on the basis of the coordinate position included in the transmission information. More specifically, the drawing processing device  133  generates the drawing information for performing the drawing process which traces the trajectory of the coordinate position (i.e. the trajectory of the displacement of the pen-type indicator  12 ) which changes with time. The generated drawing information is outputted to the integration processing device  134 . 
     Here, the drawing information may be generated as layer information for each unit time. For example, the drawing information indicating the trajectory of the coordinate position between a time point T 1  and a time point T 2  may be generated as the layer information indicating the trajectory of the coordinate position between the time point T 1  and a time point t 1  (T 1 &lt;t 1 &lt;T 2 ), the layer information indicating the trajectory of the coordinate position between the time point t 1  and a time point t 2  (T 1 &lt;t 1 &lt;t 2 &lt;T 2 ), and the layer information indicating the trajectory of the coordinate position between the time point t 2  and the time point T 2 . 
     The integration processing device  134  integrates the drawing information (or layer information) generated for each display apparatus  11 , as one drawing information. The integrated drawing information is outputted to the image information output device  135 . Incidentally, the integration process will be detailed later. 
     The image information output device  135  converts the drawing information integrated on the integration processing device  134  to the image information for displaying the image on the display apparatus  11  and outputs it to the display apparatus  11 . Moreover, the image information output device  135  may perform the aforementioned conversion process and output process, after integrating the image information for displaying the desired image with the drawing information for performing the drawing process at the coordinate position. 
     As a result, on the display device  114  of the display apparatus  11 , the desired image displayed, and the drawing is performed in accordance with the trajectory of the displacement of the pen-type indicator  12  as shown in  FIG. 1 . 
     Incidentally, the wireless reception device  131  constitutes one specific example of the “receiving device” of the present invention. The input processing device  132  and the drawing device  133  constitute one specific example of the “generating device” of the present invention. The integration processing device  134  and the image information output device  135  constitute one specific example of the “controlling device” of the present invention. 
     (1-2) Operation Principle 
     Next, with reference to  FIG. 5  to  FIG. 11 , an explanation will be given on the operation principle of the input system  1  in the first example. 
     Firstly, with reference to  FIG. 5 , the operation principle of the display apparatus  1  will be described.  FIG. 5  is a flowchart conceptually showing a flow of the operations of the display apparatus  11  in the first example. 
     As shown in  FIG. 5 , firstly, the image information outputted from the image information output device  135  is obtained by the operation of the image information input device  112  (step S 101 ). 
     Then, the pulse generation operation by the pulse generation device  113  goes into standby mode. At this time, the pulse generation device  113  preferably obtains the display unique coordinate information from the display unique coordinate information memory device  111 . 
     Then, it is judged whether or not now is the timing to display the pattern image indicating the display unique coordinate information (i.e. the coordinate pattern image) (step S 103 ). 
     As a result of the judgment in the step S 103 , if it is judged that now is the timing to display the pattern image indicating the display unique coordinate information (i.e. the coordinate pattern image) (the step S 103 : Yes), one or several of the 2000 pulses for displaying one frame image are generated in accordance with the display unique coordinate information stored in the display unique coordinate information memory device  111 . In other words, the pulses for displaying the pattern image are generated (step S 105 ). As a result, the light emitting elements or the like which constitute the pixels on the display device  114  are driven in accordance with the generated pulses, and the coordinate pattern image is actually displayed. 
     On the other hand, as a result of the judgment in the step S 103 , if it is judged that now is not the timing to display the pattern image indicating the display unique coordinate information (i.e. the coordinate pattern image) (the step S 103 : No), then, it is judged whether or not now is the timing to display a normal image (i.e. desired image) which is not the pattern image (step S 104 ). 
     As a result of the judgment in the step S 104 , if it is judged that now is the timing to display the normal image which is not the pattern image (the step S 104 : Yes), pulses other than the first one or several of the 2000 pulses for displaying one frame image are generated in accordance with the image information obtained in the step S 101 . In other words, the pulses for displaying the image indicated by the image information obtained in the step S 101  are generated (step S 105 ). As a result, the light emitting elements or the like which constitute the pixels on the display device  114  are driven in accordance with the generated pulses, and the image indicated by the image information obtained in the step S 101  is actually displayed. 
     Now, with reference to  FIG. 6  and  FIG. 7 , a more detailed explanation will be given on one example of a method of displaying the coordinate pattern image and the image information obtained in the step S 101  in  FIG. 5 .  FIG. 6  is a waveform chart conceptually showing the 2000 pulses which constitute one frame image.  FIG. 7  is a schematic diagram conceptually showing a display aspect of the coordinate pattern image and the image information obtained in the step S 101  in  FIG. 5 . 
     As shown in  FIG. 6 , one frame image is displayed by driving the light emitting elements or the like which constitute the pixels on the display device  114  on the basis of the 2000 pulses which have different light-emitting time lengths. In other words, one frame image is formed by time-integrating the light emission from the light emitting elements or the like driven by the 2000 pulses. Here, the first two pulses of the 2000 pulses are considered as reset pulses for canceling an influence by the previous one frame image, and this first two pulse period is defined as a reset period. In other words, in the first example, a reset operation of the display apparatus  11  is performed in a frame cycle. 
     At this time, a period or term from the leading edge of one pulse to the leading edge of a next pulse is defined as a sub field. Therefore, in the first example, there are a plurality of sub fields. In the first example, the first one or several of the plurality of sub fields (referred to as a sub field for displaying the coordinate information, in  FIG. 6 ) are used to display the coordinate pattern image. In other words, the pulses in the reset period are used to display the coordinate pattern image. Moreover, the other sub fields (referred to as a sub field for displaying the image information, in  FIG. 6 ) are used to display the image indicated by the image information. 
     By driving the light emitting elements or the like which constitute the display device  114  in accordance with the pulses, the image shown in  FIG. 7  is displayed on the display device  114 . In other words, after the coordinate pattern image is displayed at the beginning of one frame, the image indicated by the image information is displayed. Such display is repeated by a frame unit. Therefore, the pen-type indicator  12  drives the sensing device  121  in the first timing of the one frame detected by the coordinate information display synchronization sensor  123 , thereby detecting the coordinate pattern image displayed at the beginning of the one frame. Incidentally, the operation of detecting the first timing of the one frame will be detailed later. 
     Incidentally, in general, if a next frame image is displayed after one frame image is displayed, not only the reset process but also a predetermined process are performed, and as a result, a noise peculiar to the predetermined process is emitted. Therefore, even if it is constructed to detect not only the noise peculiar to the reset operation but also the noise peculiar to the predetermined process performed when a next frame image is displayed after one frame image is displayed, it is possible to detect the coordinate pattern image. 
     In  FIG. 5  again, on the other hand, as a result of the judgment in the step S 104 , if it is judged that now is not the timing to display the normal image which is not the pattern image (the step S 104 : No), the operational flow returns to the step S 102 , and the operations in the step S 102  and the subsequent steps are repeated. 
     Then, it is judged whether or not the display of the image is to be ended (step S 106 ). 
     As a result of the judgment in the step S 106 , if it is judged that the display of the image is not to be ended (the step S 106 : No), the operational flow returns to the step S 102 , and the operations in the step S 102  and the subsequent steps are repeated. 
     On the other hand, as a result of the judgment in the step S 106 , if it is judged that the display of the image is to be ended (the step S 106 : Yes), the operation of displaying the image on the display apparatus  11  is ended. 
     Next, with reference to  FIG. 8 , the operation principle of the pen-type indicator  12  will be described.  FIG. 8  is a flowchart conceptually showing a flow of the operations of the pen-type indicator  12  in the first example. 
     As shown in  FIG. 8 , the operation of detecting the coordinate pattern image by the sensing device  121  (in other words, an imaging operation) goes into standby mode (step S 201 ). 
     Then, the sensing device  121  obtains the pen pressure signal outputted from the pen pressure sensor  122  (step S 202 ). Then, it is judged whether or not the distance between the pen-type indicator  12  and the display device  114  is a distance which allows the sensing device  121  to detect the image, on the basis of the obtained pen pressure signal (step S 203 ). The details of the judgment operation are as described above. 
     As a result of the judgment in the step S 203 , if it is judged that the distance between the pen-type indicator  12  and the display device  114  is not the distance which allows the sensing device  121  to detect the image (the step S 203 : No), the operational flow returns to the step S 201 , and the operations in the step S 201  and the subsequent steps are repeated. 
     On the other hand, as a result of the judgment in the step S 203 , if it is judged that the distance between the pen-type indicator  12  and the display device  114  is the distance which allows the sensing device  121  to detect the image (the step S 203 : Yes), then, the sensing device  121  obtains the synchronization signal outputted from the coordinate information display synchronization sensor  123  (step S 204 ). Then, it is judged whether or not it is the timing in which the coordinate pattern image is displayed on the display device  114 , on the basis of the obtained synchronization signal (step S 205 ). 
     As a result of the judgment in the step S 205 , if it is judged that it is not the timing in which the coordinate pattern image is displayed on the display device  114  (the step S 205 : No), the operational flow returns to the step S 201 , and the operations in the step S 201  and the subsequent steps are repeated. 
     On the other hand, as a result of the judgment in the step S 205 , if it is judged that it is the timing in which the coordinate pattern image is displayed on the display device  114  (the step S 205 : Yes), the coordinate pattern image is detected by the sensing device  121  (step S 206 ). 
     Now, with reference to  FIG. 9 , an explanation will be given on the operation of detecting the timing in which the coordinate pattern image is displayed on the display device  114 .  FIG. 9  is a waveform chart showing a principle of the operation of detecting the timing in which the coordinate pattern image is displayed on a display device and a block diagram conceptually showing the detailed structure of the coordinate information display synchronization sensor  123 . 
     As shown in  FIG. 9 , in the first example, the reset operation of the display apparatus  11  is performed in the frame cycle. At this time, the reset pulse is used, and a peculiar noise is emitted from the surface of the display device  114  in accordance with the reset pulse. The coordinate information display synchronization sensor  123  detects the noise peculiar to the reset pulse, by the operation of a noise sensor circuit  1231  disposed therein. After that, the coordinate information display synchronization sensor  123  generates the synchronization signal by shaping the waveform of the detected noise by the operation of a noise signal waveform shaping circuit  1232  provided therein. The synchronization signal is, for example, a signal whose signal level becomes high in the timing in which the noise is detected (i.e. a signal which rises in substantially the same timing as the reset pulse). 
     Therefore, the timing in which the signal level of the synchronization signal becomes high is the timing in which the coordinate pattern image is displayed on the display device  114 . On the sensing device  121 , the coordinate pattern image is detected in the timing in which the signal level of the synchronization signal becomes high. 
     In  FIG. 8  again, the coordinate pattern image detected on the sensing device  121  is converted into a format easily processed at the subsequent stage of the image processing device  124 , by the operation of the image processing device  124  (step S 207 ). 
     Then, the display apparatus  11  on which the coordinate pattern image is detected is specified (step S 208 ), and the coordinate position indicated by the coordinate pattern image is detected (step S 209 ), with reference to display unique coordinate information stored in the display unique coordinate information memory device  126 , by the operation of the display apparatus specification/position detection device  125 . 
     Then, the transmission information is generated by the operation of the transmission information integration device  127  (step S 210 ), and the transmission information is transmitted to the application apparatus  13  by the operation of the wireless transmission device  128  (step S 211 ). 
     Next, with reference to  FIG. 10 , the operation principle of the application apparatus  13  will be described.  FIG. 10  is a flowchart conceptually showing a flow of the operations of the application apparatus  13  in the first example. 
     As shown in  FIG. 10 , firstly, the transmission information is received by the operation of the wireless reception device  131  (step S 301 ). 
     Then, by analyzing the transmission information by the operation of the input processing device  132 , it is confirmed which display apparatus the transmission information corresponds to (i.e. the display apparatus  11  that is a target of drawing the trajectory indicated by the coordinate position included in the transmission information is confirmed) (step S 302 ). 
     Then, the drawing information for performing the drawing process at the coordinate position is generated for each display apparatus  11 , on the basis of the coordinate position included in the transmission information, by the operation of the drawing processing device  133  (step S 303 ). As a result, the drawing information for performing the drawing process on the display apparatus (# 1 )  11  (# 1 ) and the drawing information for performing the drawing process on the display apparatus (# 2 )  11  (# 2 ) are generated. 
     Then, the pieces of drawing information generated for the respective display apparatuses  11  are integrated as one drawing information by the operation of the integration processing device  134  (step S 304 ), and the integrated drawing information is converted to the image information and outputted to the display apparatus  11  by the operation of the image information output device  135 . 
     As a result, on the display device  114  of the display apparatus  11 , the desired image is displayed, and the drawing is performed in accordance with the trajectory of the displacement of the pen-type indicator  12 , as shown in  FIG. 1 . 
     Now, with reference to  FIG. 11 , an explanation will be given on the drawing process, the integration process, and the image displayed as a result.  FIG. 11  is a schematic diagram conceptually showing the drawing process, the integration process, and the image displayed as a result. 
     As shown on the left side in  FIG. 11 , it is assumed that the pen-type indicator (# 1 )  12  (# 1 ) is operated by a user to draw a letter of “A” on the left side of the display device  114  of the display apparatus (# 1 )  11  (# 1 ) in a term t 1 , that the pen-type indicator (# 2 )  12  (# 2 ) is operated by the user to draw a letter of “E” in the center of the display device  114  of the display apparatus (# 2 )  11  (# 2 ) in a term t 2 , that the pen-type indicator (# 1 )  12  (# 1 ) is operated by the user to draw a letter of “C” on the right side of the display device  114  of the display apparatus (# 1 )  11  (# 1 ) in a term t 3 , that the pen-type indicator (# 2 )  12  (# 2 ) is operated by the user to draw a letter of “F” on the right side of the display device  114  of the display apparatus (# 2 )  11  (# 2 ) in a term t 4 , that the pen-type indicator (# 2 )  12  (# 2 ) is operated by the user to draw a letter of “D” on the left side of the display device  114  of the display apparatus (# 2 )  11  (# 2 ) in a term t 5 , and that the pen-type indicator (# 1 )  12  (# 1 ) is operated by the user to draw a letter of “B” in the center of the display device  114  of the display apparatus (# 1 )  11  (# 1 ) in a term t 6 . 
     At this time, as shown in the center in  FIG. 11 , the drawing processing device  133  generates the drawing information for performing the drawing process at the coordinate position, for each display apparatus  11 , as the layer information for each unit time. Specifically, for example, the drawing processing device  133  generates the drawing information for the display apparatus (# 1 )  11  (# 1 ) as the layer information according to the trajectory of the drawn letter of “A” according to the term t 1 , the layer information according to the trajectory of the drawn letter of “C” according to the term t 3 , and the layer information according to the trajectory of the drawn letter of “B” according to the term t 6 . In the same manner, the drawing processing device  133  generates the drawing information for the display apparatus (# 2 )  11  (# 2 ) as the layer information according to the trajectory of the drawn letter of “E” according to the term t 2 , the layer information according to the trajectory of the drawn letter of “F” according to the term t 4 , and the layer information according to the trajectory of the drawn letter of “D” according to the term t 5 . 
     The integration processing device  134  integrates the drawing information (or layer information) generated by the drawing processing device  133  in accordance with a predetermined criterion. For example, in an &lt;example 1&gt;, the pieces of layer information in all the terms between a term t 1  to a term t 6  are integrated to one drawing information. On the other hand, in an &lt;example 2&gt;, the pieces of layer information in the term t 1 , the term t 5 , and the term t 6  are integrated to one drawing information. Of course, the layer information may be integrated in another aspect. 
     As a result, if the drawing information integrated as shown in the &lt;example 1&gt; is converted to the image information and outputted to the display apparatus  11 , “ABC” is displayed on the display apparatus (# 1 )  11  (# 1 ) and “DEF” is displayed on the display apparatus (# 2 )  11  (# 2 ), as shown on the upper right side in  FIG. 11 . On the other hand, if the drawing information integrated as shown in the &lt;example 2&gt; is converted to the image information and outputted to the display apparatus  11 , “AB” is displayed on the display apparatus (# 1 )  11  (# 1 ) and “D” is displayed on the display apparatus (# 2 )  11  (# 2 ), as shown on the lower right side in  FIG. 11 . 
     As explained above, according to the input system  1  in the first example, a user can draw the desired letter or character, graphic, and the like on the desired one of the plurality of display apparatuses  11  by using the pen-type indicator  12 , feeling extremely similar to the conventionally used whiteboard. 
     In particular, the coordinate pattern image indicating the display unique coordinate information is displayed on each of the plurality of display apparatuses  11 , and the coordinate position of each of the plurality of pen-type indicators  12  on the display device  114  (i.e. each of the trajectories formed by the plurality of pen-type indicators  12  being displaced on the display device  114 ) is specified on the basis of the coordinate pattern image detected by each of the plurality of pen-type indicators  12 . Thus, it is possible to specify the coordinate position on the display device  114  of each of the plurality of pen-type indicators  12 , without influence from the adjacent display apparatus  11 . Specifically, for example, as long as the pen-type indicator (# 1 )  12  (# 1 ) is displaced on the display device  114  of the display apparatus (# 1 )  11  (# 1 ), the displacement of the pen-type indicator (# 1 )  12  (# 1 ) does not have an adverse effect on the display apparatus (# 2 )  11  (# 2 ), and moreover, the presence of the display apparatus (# 2 )  11  (# 2 ) does not have an adverse effect on the specification of the coordinate position of the pen-type indicator (# 1 )  12  (# 1 ). By this, even if the plurality of display apparatuses  11  are arranged, a user can draw the desired letter or character, graphic, and the like on the desired one of the plurality of display apparatuses  11 , by using the plurality of pen-type indicators  12  without a particular inconvenience. 
     In addition, the drawing information is generated as the layer information. Thus, it is possible to selectively perform the drawing process corresponding to the trajectory drawn in the desired timing of the trajectories of the displacement by the plurality of pen-type indicators  12 . 
     Moreover, since the coordinate pattern image is displayed by using one or several of the 2000 pulses for displaying one frame image, the coordinate pattern image is rarely visually recognized by a user. Moreover, since the display of the coordinate pattern image has little effect on the display of the image to be originally displayed, the deterioration of the image quality of the image to be originally displayed is rarely visually recognized by the user. Therefore, no matter what image is displayed on the display apparatus  11 , the aforementioned structure can be adopted. In other words, it is possible to realize the input system  1  of high versatility. 
     Incidentally, the aforementioned example exemplifies that the two display apparatuses  11  are provided; however, obviously, three or more display apparatuses may be provided. In the same manner, the aforementioned example exemplifies that the two pen-type indicators  12  are provided; however, obviously, one pen-type indicator  12  may be provided. 
     Moreover, the aforementioned example exemplifies the use of the 2000 pulse for displaying one frame image; however, obviously, the number of pulses for displaying one frame image is not limited to this. 
     (2) Second Example 
     Next, with reference to  FIG. 12  to  FIG. 17 , a second example of the input system of the present invention will be explained. Incidentally, the same constituent or operation as that of the input system  1  in the first example described above will carry the same referential numeral or step number, and the detailed explanation thereof will be omitted. 
     (2-1) Basic Structure 
     Firstly, with reference to  FIG. 12 , an explanation will be given on the basic structure of an input system  1   a  in the second example.  FIG. 12  is a block diagram conceptually showing the basic structure of the input system  1   a  in the second example. 
     As shown in  FIG. 12 , the input system  1   a  in the second example is provided with the plurality of display apparatuses  11  (specifically, the display apparatus (# 1 )  11  (# 1 ) and the display apparatus (# 2 )  11  (# 2 )), a plurality of pen-type indicators  12   a  (specifically, a pen-type indicator (# 1 )  12   a  (# 1 ), a pen-type indicator (# 2 )  12   a  (# 2 ), a pen-type indicator (# 3 )  12   a  (# 3 ), a pen-type indicator (# 4 )  12   a  (# 4 ), a pen-type indicator (# 5 )  12   a  (# 5 ), and a pen-type indicator (# 6 )  12   a  (# 6 )), and an application apparatus  13   a.    
     In other words, in the input system  1   a  in the second example, a plurality of pen-type indicators  12   a  correspond to each display apparatus  11 . 
     Next, with reference to  FIG. 13 , an explanation will be given on the basic structure of the pen-type indicator  12   a  provided for the input system  1   a  in the second example.  FIG. 13  is a block diagram conceptually showing the basic structure of the pen-type indicator  12   a  in the second example. Incidentally, since the pen-type indicator (# 1 )  12   a  (# 1 ) to the pen-type indicator (# 6 )  12   a  (# 6 ) described above have the same structure, they will be collectively explained as the pen-type indicator  12   a  hereinafter. 
     As shown in  FIG. 13 , the pen-type indicator  12   a  is provided with the sensing device  121 , the pen pressure sensor  122 , the coordinate information display synchronization sensor  123 , the image processing device  124 , the display apparatus specification/position detection device  125 , the display unique coordinate information memory device  126 , a transmission information integration device  127   a , and the wireless transmission device  128 . In other words, the pen-type indicator  12   a  in the second example has substantially the structure as the pen-type indicator  12  in the first example described above. 
     The pen-type indicator  12   a  in the second example, in particular, is provided with a pen unique ID information memory device  129   a , in addition to the constituents of the pen-type indicator  12  in the first example described above. The pen unique ID information memory device  129   a  stores identification information unique to each pen-type indicator  12   a  (hereinafter referred to as “pen unique ID information”, as occasion demands). The pen unique ID information is integrated as one portion of the transmission information, by the operation of the transmission information integration device  127   a . In other words, on the transmission information integration device  127   a  in the second example, the transmission information is generated by integrating the pen unique ID information about each pen-type apparatus  12   a , in addition to the information indicating the coordinate position and the display apparatus specified on the display apparatus specification/position detection device  125 . 
     Next, with reference to  FIG. 14 , an explanation will be given on the basic structure of the application apparatus  13   a  provided for the input system la in the second example.  FIG. 14  is a block diagram conceptually showing the basic structure of the application apparatus  13   a  in the second example. 
     As shown in  FIG. 14 , the application apparatus  13   a  is provided with the wireless reception device  131 , an input processing device  132   a , a drawing processing device  133   a , an integration processing device  134   a , and the image information output device  135 . In other words, the application apparatus  13   a  in the second example has substantially the same structure as the application apparatus  13  in the first example described above. 
     In the second example, since the information indicating the pen unique ID information about each pen-type apparatus  12   a  is integrated with the transmission information, the operations of the input processing device  132   a , the drawing processing device  133   a , and the integration processing device  134   a  are slightly different from those of the input processing device  132 , the drawing processing device  133 , and the integration processing device  134  in the first example, and the pen unique ID information memory device  136   a  is further provided. 
     Specifically, the input processing device  132   a  separates the transmission information received on the wireless reception device  131  for each display apparatus  11  and for each pen-type indicator  12   a , and it outputs the separated information to the drawing processing device  133   a.    
     Here, on the application apparatus  13   a , the same pen unique ID information as the pen unique ID information stored in the pen unique ID information memory device  129   a  described above is stored in the pen unique ID information memory device  136   a . In particular, the same pen unique ID information as all the pen unique ID information about the plurality of pen-type indicators  12   a  is preferably stored in the pen unique ID information memory device  136   a . Thus, the input processing device  132   a  can separate the transmission information for each pen-type indicator by comparing the pen unique ID information stored in the pen unique ID information memory device  136   a  and the pen unique ID information included in the received transmission information. 
     The drawing processing device  133   a  generates the drawing information for performing the drawing process at the coordinate position, for each display apparatus  11  and for each pen-type indicator  12   a , on the basis of the coordinate position included in the transmission information. 
     Here, the drawing information may be generated as the layer information for each pen-type indicator  12   a . For example, the drawing information for the display apparatus (# 1 )  11  (# 1 ) may be generated as the layer information indicating the trajectory of the pen-type indicator (# 1 )  12   a  (# 1 ), the layer information indicating the trajectory of the pen-type indicator (# 2 )  12   a  (# 2 ), and the layer information indicating the trajectory of the pen-type indicator (# 3 )  12   a  (# 3 ). 
     The integration processing device  134   a  integrates the drawing information (or layer information) generated for each display apparatus  11  and for each pen-type indicator  12   a , as one drawing information. The integrated drawing information is outputted to the image information output device  135 . 
     s(2-2) Operation Principle 
     Next, with reference to  FIG. 15  to  FIG. 17 , an explanation will be given on the operation principle of the input system  1   a  in the second example. 
     Firstly, with reference to  FIG. 15 , the operation principle of the pen-type indicator  12   a  will be described.  FIG. 15  is a flowchart conceptually showing a flow of the operations of the pen-type indicator  12   a  in the second example. 
     As shown in  FIG. 15 , the operations from the step S 201  to the step S 209  are performed in the same manner as the operations of the pen-type indicator  12  in the first example described above. 
     In the second example, in particular, the transmission information is generated by integrating the information indicating the pen unique ID information about each pen-type apparatus  12   a  stored in the pen unique ID information memory device  129   a , in addition to the information indicating the coordinate position and the display apparatus specified on the display apparatus specification/position detection device  125  by the operation of the transmission information integration device  127   a  (the step S 210 ). 
     Then, in the same manner as the operation of the pen-type indicator  12  in the first example, the generated transmission information is transmitted to the application apparatus (the step S 211 ). 
     Next, with reference to  FIG. 16 , an explanation will be given on the operation principle of the application apparatus  13   a .  FIG. 16  is a flowchart conceptually showing a flow of the operations of the application apparatus  13   a  in the second example. 
     As shown in  FIG. 16 , in the same manner as the operation of the application apparatus  13  in the first example, the transmission information is firstly received by the operation of the wireless reception device  131  (step S 301 ). 
     Then, by analyzing the transmission information with reference to the pen unique ID information stored in the pen unique ID information memory device  136   a  by the operation of the input processing device  132   a , it is confirmed which pen-type indicator  12   a  the transmission information corresponds to (i.e. the pen-type indicator  12   a  that draws the trajectory indicated by the coordinate position included in the transmission information is confirmed) (step S 306   a ). 
     Then, in the same manner as the operation of the application apparatus  13  in the first example, by analyzing the transmission information by the operation of the input processing device  132   a , it is confirmed which display apparatus  11  the transmission information corresponds to (i.e. the display apparatus  11  that is a target of drawing the trajectory indicated by the coordinate position included in the transmission information is confirmed) (step S 302 ). 
     Then, the drawing information for performing the drawing process at the coordinate position is generated for each display apparatus  11  and for each pen-type indicator  12   a , on the basis of the drawing position included in the transmission information, by the operation of the drawing processing device  133   a  (step S 303   a ). As a result, as the drawing information for the display apparatus (# 1 )  11  (# 1 ) (in other words, the layer information), the drawing information indicating the trajectory of the pen-type indicator (# 1 )  12   a  (# 1 ), the drawing information indicating the trajectory of the pen-type indicator (# 2 )  12   a  (# 2 ), the drawing information indicating the trajectory of the pen-type indicator (# 3 )  12   a  (# 3 ), the drawing information indicating the trajectory of the pen-type indicator (# 4 )  12   a  (# 4 ), the drawing information indicating the trajectory of the pen-type indicator (# 5 )  12   a  (# 5 ), and the drawing information indicating the trajectory of the pen-type indicator (# 6 )  12   a  (# 6 ) are generated. In the same manner, as the drawing information for the display apparatus (# 2 )  11  (# 2 ) (in other words, the layer information), the drawing information indicating the trajectory of the pen-type indicator (# 1 )  12   a  (# 1 ), the drawing information indicating the trajectory of the pen-type indicator (# 2 )  12   a  (# 2 ), the drawing information indicating the trajectory of the pen-type indicator (# 3 )  12   a  (# 3 ), the drawing information indicating the trajectory of the pen-type indicator (# 4 )  12   a  (# 4 ), the drawing information indicating the trajectory of the pen-type indicator (# 5 )  12   a  (# 5 ), and the drawing information indicating the trajectory of the pen-type indicator (# 6 )  12   a  (# 6 ) are generated. 
     Incidentally, with regard to the display apparatus  11  in which the operation by a certain pen-type indicator  12   a  is not performed, obviously, it is not necessary to generate the drawing information indicating the trajectory of the pen-type indicator  12   a.    
     Then, the drawing information generated for each display apparatus  11  and for each pen-type indicator  12   a  is integrated as one drawing information by the operation of the integration processing device  134   a  (step S 304   a ), and the integrated drawing information is converted to the image information and outputted to the display apparatus  11  by the operation of the image information output device  135 . 
     As a result, on the display device  114  of the display apparatus  11 , the desired image is displayed, and the drawing is performed in accordance with the trajectory of the displacement of the pen-type indicator  12   a , as show in  FIG. 12 . 
     Now, with reference to  FIG. 17 , an explanation will be given on the drawing process, the integration process, and the image displayed as a result.  FIG. 17  is a schematic diagram conceptually showing the drawing process, the integration process, and the image displayed as a result in the second example. 
     As shown on the left side in  FIG. 17 , it is assumed that the pen-type indicator (# 1 )  12   a  (# 1 ) is operated by a user to draw a letter of “A” on the left side of the display device  114  of the display apparatus (# 1 )  11  (# 1 ), that the pen-type indicator (# 2 )  12   a  (# 2 ) is operated by the user to draw a letter of “B” in the center of the display device  114  of the display apparatus (# 1 )  11  (# 1 ), that the pen-type indicator (# 3 )  12   a  (# 3 ) is operated by the user to draw a letter of “C” on the right side of the display device  114  of the display apparatus (# 1 )  11  (# 1 ), that the pen-type indicator (# 4 )  12   a  (# 4 ) is operated by the user to draw a letter of “D” on the left side of the display device  114  of the display apparatus (# 2 )  11  (# 2 ), that the pen-type indicator (# 5 )  12   a  (# 5 ) is operated by the user to draw a letter of “E” in the center of the display device  114  of the display apparatus (# 2 )  11  (# 2 ), and that the pen-type indicator (# 6 )  12   a  (# 6 ) is operated by the user to draw a letter of “F” on the right side of the display device  114  of the display apparatus (# 2 )  11  (# 2 ). 
     At this time, as shown in the center in  FIG. 17 , the drawing processing device  133   a  generates the drawing information for performing the drawing process at the coordinate position, for each display apparatus  11 , as the layer information for each pen-type indicator  12   a . Specifically, for example, the drawing processing device  133   a  generates the drawing information for the display apparatus (# 1 )  11  (# 1 ), as the layer information according to the trajectory that the pen-type indicator (# 1 )  12   a  (# 1 ) draws a letter of “A”, the layer information according to the trajectory that the pen-type indicator (# 2 )  12   a  (# 2 ) draws a letter of “B”, and the layer information according to the trajectory that the pen-type indicator (# 3 )  12   a  (# 3 ) draws a letter of “C”. In the same manner, the drawing processing device  133   a  generates the drawing information for the display apparatus (# 2 )  11  (# 2 ), as the layer information according to the trajectory that the pen-type indicator (# 4 )  12   a  (# 4 ) draws a letter of “E”, the layer information according to the trajectory that the pen-type indicator (# 5 )  12   a  (# 5 ) draws a letter of “F”, and the layer information according to the trajectory that the pen-type indicator (# 6 )  12   a  (# 6 ) draws a letter of “D”. 
     The integration processing device  134   a  integrates the drawing information (or layer information) generated by the drawing processing device  133   a  in accordance with a predetermined criterion. For example, in an &lt;example 1&gt;, all the pieces of layer information corresponding to the pen-type indicator (# 1 )  12   a  (# 1 ) to the pen-type indicator (# 6 )  12   a  (# 6 ) are integrated to one drawing information. On the other hand, in an &lt;example 2&gt;, the pieces of layer information corresponding to the pen-type indicator (# 1 )  12   a  (# 1 ), the pen-type indicator (# 3 )  12   a  (# 3 ), and the pen-type indicator (# 6 )  12   a  (# 6 ) are integrated to one drawing information. Of course, the layer information may be integrated in another aspect. 
     As a result, if the drawing information integrated as shown in the &lt;example 1&gt; is converted to the image information and outputted to the display apparatus  11 , “ABC” is displayed on the display apparatus (# 1 )  11  (# 1 ) and “DEF” is displayed on the display apparatus (# 2 )  11  (# 2 ), as shown on the upper right side in  FIG. 17 . On the other hand, if the drawing information integrated as shown in the &lt;example 2&gt; is converted to the image information and outputted to the display apparatus  11 , “AC” is displayed on the display apparatus (# 1 )  11  (# 1 ) and “F” is displayed on the display apparatus (# 2 )  11  (# 2 ), as shown on the lower right side in  FIG. 17 . 
     As explained above, according to the input system  1   a  in the second example, it is possible to receive the same effects as those received by the input system  1  in the first example described above. 
     In the input system  1   a  in the second example, in particular, after the pen unique ID information is assigned to each pen-type indicator  12   a  and it is integrated with the transmission information, the integrated information is transmitted to the application apparatus  13   a . Therefore, even if the plurality of pen-type indicators  12   a  are associated with one display apparatus  11 , it is possible to preferably specify the trajectory drawn by each pen-type indicator  12   a.    
     Incidentally, various processes on the application apparatus  13   a  (specifically, the input process, the drawing process, the integration process, and the like) may be performed in dedicated hardware. Alternatively, they may be performed in software which operates on a CPU. If they may be performed in software, it is possible to receive such an effect that the structure of the application apparatus  13  can be simplified. This is the same in the first example. 
     Incidentally, the aforementioned example exemplifies that the two display apparatuses  11  are provided and that the six pen-type indicators  12   a  are provided; however, obviously, the number of the display apparatuses  11  and the number of the pen-type indicators  12   a  may be arbitrarily set. 
     (3) Third Example 
     Next, with reference to  FIG. 18  to  FIG. 21 , a third example of the input system of the present invention will be explained. Incidentally, the same constituent or operation as that of the input system  1  in the first example described above will carry the same referential numeral or step number, and the detailed explanation thereof will be omitted. 
     (3-1) Basic Structure 
     An input system  1   b  in the third example is provided, as the basic structure, with the plurality of display apparatuses  11  (specifically, the display apparatus (# 1 )  11  (# 1 ) and the display apparatus (# 2 )  11  (# 2 )), a plurality of pen-type indicators  12   b  (specifically, a pen-type indicator (# 1 )  12   b  (# 1 ), a pen-type indicator (# 2 )  12   b  (# 2 ), a pen-type indicator (# 3 )  12   b  (# 3 ), a pen-type indicator (# 4 )  12   b  (# 4 ), a pen-type indicator (# 5 )  12   b  (# 5 ), and a pen-type indicator (# 6 )  12   b  (# 6 )), and an application apparatus  13   b , as in the input system  1   a  in the second example. 
     In the third example, the inner structures of the pen-type indicator  12   b  and the application apparatus  13   b  are different from those of the pen-type indicator  12   a  and the application apparatus  13   a  in the second example. Hereinafter, with reference to  FIG. 18  and  FIG. 19 , an explanation will be given on the basic structures of the pen-type indicator  12   b  and the application apparatus  13   b .  FIG. 18  is a block diagram conceptually showing the basic structure of the pen-type indicator  12   b  in the third example.  FIG. 19  is a block diagram conceptually showing the basic structure of the application apparatus  13   b  in the third example. 
     As shown in  FIG. 18 , the pen-type indicator  12   b  is provided with the sensing device  121 , the pen pressure sensor  122 , the coordinate information display synchronization sensor  123 , the image processing device  124 , a transmission information integration device  127   a , the wireless transmission device  128 , and a pen unique ID information memory device  129   a . In other words, the pen-type indicator  12   b  in the third example has the structure that the display apparatus specification/position detection device  125  and the display unique coordinate information memory device  126  are eliminated, as compared to the pen-type indicator  12   a  in the second example described above. 
     Therefore, the pen-type indicator  12   b  in the third example allows the coordinate pattern outputted from the image processing device  124  to be the transmission information without change, and it does not perform the operation of specifying the display apparatus  11  in which the coordinate pattern image is detected nor the operation of detecting the coordinate position indicated by the coordinate pattern image. Therefore, the transmission information integration device  127   a  in the third example integrates the coordinate pattern image outputted from the image processing device  124  and the pen unique ID stored in the pen unique ID information memory device  129   a , thereby generating the transmission information. 
     As shown in  FIG. 19 , the application apparatus  13   b  is provided with the wireless reception device  131 , the input processing device  132   a , the drawing processing device  133   a , the integration processing device  134   a , the image information output device  135 , the display apparatus specification/position detection device  125 , and the display unique coordinate information memory device  126 . In other words, the application apparatus  13   b  in the third example has the structure that the display apparatus specification/position detection device  125  and the display unique coordinate information memory device  126  are added, as compared to the application apparatus  13   a  in the second example described above. 
     Therefore, the application apparatus  13   b  in the third example performs the operation of specifying the display apparatus  11  in which the coordinate pattern image is detected and the operation of detecting the coordinate position indicated by the coordinate pattern image, which are performed by the pen-type indicator  12  ( 12   a ) in the first and second examples, on the basis of the transmission information outputted from the input processing device  132   a.    
     (3-2) Operation Principle 
     Next, with reference to  FIG. 20  and  FIG. 21 , an operation will be given on the operation principle of the input system  1   b  in the third example. 
     Firstly, with reference to  FIG. 20 , the operation principle of the pen-type indicator  12   b  will be explained.  FIG. 20  is a flowchart conceptually showing a flow of the operations of the pen-type indicator  12   b  in the third example. 
     As shown in  FIG. 20 , the operations from the step S 201  to the step S 207  are performed in the same manner as those on the pen-type indicator  12  in the first example and the pen-type indicator  12   a  in the second example described above. 
     Then, the transmission information is generated by integrating the coordinate pattern image outputted form the image processing device  124  with the pen unique ID stored in the pen unique ID information memory device  129   a  (the step S 210 ). 
     Then, in the same manner as the operations of the pen-type indicator  12  in the first example and the pen-type indicator  12   a  in the second example, the generated transmission information is transmitted to the application apparatus (the step S 211 ). 
     Next, with reference to  FIG. 21 , the operation principle of the application apparatus  13   b  will be explained.  FIG. 21  is a flowchart conceptually showing a flow of the operations of the application apparatus  13   b  in the third example. 
     As shown in  FIG. 21 , the operations from the step S 301  to the step S 306   a  are performed in the same manner as those of the pen-type indicator  12   a  in the second example explained above. 
     Then, the display apparatus  11  in which the coordinate pattern image is detected is specified (the step S 208 ), and the coordinate position indicated by the coordinate pattern image is detected (the step S 209 ), with reference to the display unique coordinate information stored in the display unique coordinate information memory device  126 , by the operation of the display apparatus specification/position detection device  125 . 
     The subsequent operations from the step S 303   a  to the step S 305  are performed in the same manner as those of the pen-type indicator  12   a  in the second example described above. 
     As explained above, according to the input system  1   b  in the third example, it is possible to receive the same effects as those received by the input system  1   a  in the second example described above. 
     In the input system  1   b  in the third example, in particular, the display apparatus specification/position detection device  125  and the display unique coordinate information memory device  126  are provided for the single application apparatus  13   b  commonly used for the plurality of display apparatuses  11  and the plurality of pen-type indicators  12   b . Therefore, it is possible to simplify the structure of each of the plurality of pen-type indicators  12   b . As a result, it is possible to reduce the manufacturing costs and the power consumption of the plurality of pen-type indicators  12   b . Considering that the input system  1   b  is provided with the plurality of pen-type indicators  12   b , the reduction in the manufacturing costs and the power consumption of the plurality of pen-type indicators  12   b  also lead to the reduction in the manufacturing costs and the power consumption of the entire input system  1   b  as a whole. 
     Of course, even in the first example, the structure in the third example may be obviously adopted. 
     The present invention is not limited to the aforementioned examples, but various changes may be made, if desired, without departing from the essence or spirit of the invention which can be read from the claims and the entire specification. An input system and method, and a computer program, all of which involve such changes, are also intended to be within the technical scope of the present invention.