Patent Publication Number: US-2015059161-A1

Title: Touch panel producing method

Description:
FIELD OF THE INVENTION 
     The present invention relates to a touch panel producing method, and more particularly to an automatic touch panel producing method. 
     BACKGROUND OF THE INVENTION 
     Nowadays, according to the touch sensing methods, touch panels are classified into several types, including resistive touch panels, capacitive touch panels, optical touch panels, electromagnetic touch panels, acoustic wave touch panels, or the like. For example, when a surface of a capacitive touch panel is touched by a user&#39;s finger or a stylus pen, the voltage and the current corresponding to the touch position are subject to changes. According to the changes of the voltage and the current, the touch position of the surface of the touch panel is detected. Consequently, a touch input purpose is achieved. 
     Generally, the capacitive touch panel consists of an adhesive sheet and a transparent substrate attached on the adhesive sheet, wherein the transparent substrate is coated with an x-direction transparent conductor electrode and a y-direction transparent conductor electrode. Alternatively, the capacitive touch panel is a stack structure comprising a transparent substrate, a first adhesive sheet, a light guide plate and a second adhesive sheet, wherein the transparent substrate is attached on the light guide plate through the first adhesive sheet and then the light guide plate is attached on the second adhesive sheet. 
     Since the stack structure is very complicated, some drawbacks may occur. For example, during the process of fabricating the stack structure, many layers of adhesive sheets are used and many bonding and aligning steps are required. In addition, since the conventional bonding and aligning steps are manually performed, foreign matters are readily introduced into the stack structure. Moreover, due to some human factors, the production yield is usually unsatisfied, and the production stability is adversely affected. 
     Therefore, there is a need of providing an improved touch panel producing method in order to overcome the above drawbacks. 
     SUMMARY OF THE INVENTION 
     An object of the present invention provides a touch panel producing method without the manual attaching procedures. 
     In accordance with an aspect of the present invention, there is provided a touch panel producing method. Firstly, a first coiled sheet and a second coiled sheet are transferred in a specified direction. The first coiled sheet includes plural sensing regions, and the second coiled sheet is an adhesive sheet. Then, the first coiled sheet and the second coiled sheet are laminated together. Then, a laminated structure of the first coiled sheet and the second coiled sheet is cut, so that a sensing plate section is produced. The sensing plate section includes one of the plural sensing regions. Then, the sensing plate section is removed from the laminated structure of the first coiled sheet and the second coiled sheet, so that a sensing plate is produced. Afterwards, a touch control circuit board is attached on the sensing plate. 
     In accordance with an aspect of the present invention, there is provided a touch panel producing method. Firstly, a first coiled sheet, a second coiled sheet, a third coiled sheet and a fourth coiled sheet are transferred in a specified direction, and the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet are laminated together. The first coiled sheet is attached on the second coiled sheet, the second coiled sheet is attached on the third coiled sheet, and the third coiled sheet is attached on the fourth coiled sheet. The first coiled sheet includes plural sensing regions. The second coiled sheet and the fourth coiled sheet are adhesive sheets. The third coiled sheet is a light guide plate. Then, a laminated structure of the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet is cut, so that a sensing plate section is produced. The sensing plate section includes one of the plural sensing regions. Then, the sensing plate section is removed from the laminated structure of the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet, so that a sensing plate is produced. Afterwards, a touch control circuit board is attached on the sensing plate. 
     In accordance with another aspect of the present invention, there is provided a touch panel producing method. Firstly, a first coiled sheet and a second coiled sheet are transferred in a specified direction. The first coiled sheet includes plural sensing regions, and the second coiled sheet is an adhesive sheet. Then, the first coiled sheet and the second coiled sheet are laminated together. Then, a touch control circuit board is attached on the first coiled sheet. Then, a laminated structure of the first coiled sheet and the second coiled sheet is cut, so that a sensing plate section is produced. The sensing plate section includes one of the plural sensing regions and the touch control circuit board. Afterwards, the sensing plate section is removed from the laminated structure of the first coiled sheet and the second coiled sheet, so that a sensing plate is produced. 
     In accordance with an aspect of the present invention, there is provided a touch panel producing method. Firstly, a first coiled sheet, a second coiled sheet, a third coiled sheet and a fourth coiled sheet are transferred in a specified direction, and the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet are laminated together. The first coiled sheet is attached on the second coiled sheet, the second coiled sheet is attached on the third coiled sheet, and the third coiled sheet is attached on the fourth coiled sheet. The first coiled sheet includes plural sensing regions. The second coiled sheet and the fourth coiled sheet are adhesive sheets. The third coiled sheet is a light guide plate. Then, a touch control circuit board is attached on the first coiled sheet. Then, a laminated structure of the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet is cut, so that a sensing plate section is produced. The sensing plate section includes one of the plural sensing regions and the touch control circuit board. Afterwards, the sensing plate section is removed from the laminated structure of the first coiled sheet, the second coiled sheet, the third coiled sheet and the fourth coiled sheet, so that a sensing plate is produced. 
     The above objects and advantages of the present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description and accompanying drawings, in which: 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a first embodiment of the present invention; 
         FIG. 2  schematically illustrates the structure of a first coiled sheet used in the touch panel producing method according to the first embodiment of the present invention; 
         FIG. 3  schematically illustrates a flowchart of the touch panel producing method according to a first embodiment of the present invention; 
         FIG. 4  schematically illustrates a sensing plate section generated in the touch panel producing method according to the first embodiment of the present invention; 
         FIG. 5  schematically illustrates a sensing plate produced in the touch panel producing method according to the first embodiment of the present invention; 
         FIG. 6  schematically illustrates the combination of the sensing plate and a touch control circuit board produced in the touch panel producing method according to the first embodiment of the present invention; 
         FIG. 7  schematically illustrates the combination of the sensing plate, the touch control circuit board and a display panel produced in the touch panel producing method according to the first embodiment of the present invention; 
         FIG. 8  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a second embodiment of the present invention; 
         FIG. 9  schematically illustrates a flowchart of the touch panel producing method according to a second embodiment of the present invention; 
         FIG. 10  schematically illustrates a sensing plate section generated in the touch panel producing method according to the second embodiment of the present invention; 
         FIG. 11  schematically illustrates a sensing plate produced in the touch panel producing method according to the second embodiment of the present invention; 
         FIG. 12  schematically illustrates the combination of the sensing plate and a touch control circuit board produced in the touch panel producing method according to the second embodiment of the present invention; 
         FIG. 13  schematically illustrates the combination of the sensing plate, the touch control circuit board and a glass plate produced in the touch panel producing method according to the second embodiment of the present invention; 
         FIG. 14  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a third embodiment of the present invention; 
         FIG. 15  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a fourth embodiment of the present invention; 
         FIG. 16  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a fifth embodiment of the present invention; 
         FIG. 17  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a sixth embodiment of the present invention; 
         FIG. 18  schematically illustrates a flowchart of the touch panel producing method according to a sixth embodiment of the present invention; 
         FIG. 19  schematically illustrates a sensing plate section generated in the touch panel producing method according to the sixth embodiment of the present invention; 
         FIG. 20  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a seventh embodiment of the present invention; 
         FIG. 21  schematically illustrates a flowchart of the touch panel producing method according to a seventh embodiment of the present invention; and 
         FIG. 22  schematically illustrates a sensing plate section generated in the touch panel producing method according to the seventh embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     First of all, a touch panel producing method according to a first embodiment of the present invention will be illustrated with reference to  FIGS. 1 and 2 . All of the steps of the touch panel producing method are implemented in a clean room A.  FIG. 1  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a first embodiment of the present invention.  FIG. 2  schematically illustrates the structure of a first coiled sheet used in the touch panel producing method according to the first embodiment of the present invention. As shown in  FIGS. 1 and 2 , the touch panel producing apparatus  1  comprises a first shaft  10 , a second shaft  11 , a take-up roll  12 , a first roller assembly  13 , a cutting device  14 , a washing device  15 , and a removing device  16 . 
     A first coiled sheet  17  is sheathed around the first shaft  10 . As shown in  FIG. 2 , the first coiled sheet  17  comprises a plastic substrate  171 , plural sensing regions  172 , and a thin film  173 . The plural sensing regions  172  are formed on a first surface of the plastic substrate  171 . The thin film  173  is disposed on a second surface of the plastic substrate  171 . In this embodiment, each of the plural sensing regions  172  is made of nano carbon tube, nano silver, graphene or any other appropriate touch control circuit material, but is not limited thereto. The thin film  173  is an explosion-proof film, a scratch-resistant film, an anti-glare film or any other appropriate transparent film, but is not limited thereto. The plastic substrate  171  is made of a transparent plastic material such as polycarbonate (PC), polymethylmethacrylate (PMMA) or polyethylene terephthalate (PET), but is not limited thereto. 
     It is noted that the plural sensing regions  172  of  FIG. 2  are presented herein for purpose of illustration and description only. That is, the arrangements, the constitutions and the electrode circuit patterns of the plural sensing regions  172  are not restricted. Alternatively, in another embodiment, the thin film  173  on the second surface of the plastic substrate  171  is omitted. Alternatively, in a further embodiment, plural thin films  173  with different functions are disposed on the second surface of the plastic substrate  171 . 
     Please refer to  FIG. 1  again. A second coiled sheet  18  is sheathed around the second shaft  11 . The second shaft  11  is disposed below the first shaft  10 . In this embodiment, the second coiled sheet  18  is an adhesive sheet such as an optically-clear adhesive sheet (OCA sheet) or a pressure-sensitive adhesive sheet (PSA sheet), but is not limited thereto. In some other embodiments, the second coiled sheet  18  is made of other sticky material. 
     The first roller assembly  13 , the cutting device  14 , the washing device  15 , the removing device  16  and the take-up roll  12  are sequentially arranged downstream of the first shaft  10  and the second shaft  11 . An example of the cutting device  14  includes but is not limited to a laser cutting machine, a die cutting machine or a hob cutting machine. An example of the washing device  15  includes but is not limited to a dry cleaning machine or a wet cleaning machine. The removing device  16  is a robotic arm, but is not limited thereto. 
     It is noted that the components of the touch panel producing apparatus  1  as shown in the drawings are presented herein for purpose of illustration and description only. That is, the constituents of the touch panel producing apparatus  1  and the positions of all components may be varied according to the practical requirements. 
     Hereinafter, the operations of the touch panel producing method according to the first embodiment of the present invention will be illustrated with reference to  FIGS. 3 ,  4 ,  5  and  6 .  FIG. 3  schematically illustrates a flowchart of the touch panel producing method according to a first embodiment of the present invention.  FIG. 4  schematically illustrates a sensing plate section generated in the touch panel producing method according to the first embodiment of the present invention.  FIG. 5  schematically illustrates a sensing plate produced in the touch panel producing method according to the first embodiment of the present invention.  FIG. 6  schematically illustrates the combination of the sensing plate and a touch control circuit board produced in the touch panel producing method according to the first embodiment of the present invention. 
     After the first coiled sheet  17  is sheathed around the first shaft  10  and the second coiled sheet  18  is sheathed around the second shaft  11 , the first shaft  10  and the second shaft  11  are rotated to transfer the first coiled sheet  17  and the second coiled sheet  18  in an X direction (Step S 1 ). It is noted that the sequence of transferring the first coiled sheet  17  and the second coiled sheet  18  is not restricted. 
     Then, the first coiled sheet  17  and the second coiled sheet  18  are transported across the first roller assembly  13 . By the first roller assembly  13 , the first coiled sheet  17  is bonded onto the second coiled sheet  18 , so that the first coiled sheet  17  and the second coiled sheet  18  are laminated together (Step S 2 ). Then, a laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is wound around and collected by the take-up roll  12 . In this embodiment, the thin film  173  is disposed on the second surface of the plastic substrate  171 , so that the first surface of the plastic substrate  171  with the plural sensing regions  172  is bonded onto the second coiled sheet  18 . In case that no thin film  173  is disposed on the second surface of the plastic substrate  171 , the first surface or the second surface of the plastic substrate  171  may be bonded onto the second coiled sheet  18 . 
     As the first shaft  10  and the second shaft  11  are continuously rotated, the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is transferred in the X direction. When the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is moved to the cutting device  14 , the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is cut by the cutting device  14 . Consequently, a sensing plate section  19  that is detachable from the other part of the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is generated (Step S 3 ). As shown in  FIG. 4 , the sensing plate section  19  comprises a part of the first coiled sheet  17  containing the sensing region  172  and a part of the second coiled sheet  18  attached on the first coiled sheet  17 . It is noted that the shape of the sensing plate section  19  is not restricted. According to the practical requirements, the sensing plate section  19  with any desired shape may be cut by the cutting device  14 . Moreover, the profiles and the sizes of the first coiled sheet  17  and the second coiled sheet  18  as shown in  FIG. 4  are presented herein for purpose of illustration and description only and are not restricted. 
     As the first shaft  10  and the second shaft  11  are continuously rotated, the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is transferred in the X direction. When the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is moved to the washing device  15 , the contaminants (e.g. dust) which are occurred at the time of cutting task and retained on the first coiled sheet  17  and the second coiled sheet  18  are cleaned away by the washing device  15  (Step S 4 ). 
     After the washing task is completed, the first shaft  10  and the second shaft  11  are continuously rotated to transfer the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  in the X direction. When the laminated structure of the first coiled sheet  17  and the second coiled sheet  18  is moved to the removing device  16 , the sensing plate section  19  is removed from the laminated structure of the first coiled sheet  17  and the second coiled sheet  18 . After the sensing plate section  19  is removed, a corresponding sensing plate  20  is produced (Step S 5 ). The sensing plate  20  is shown in  FIG. 5 . 
     Then, the sensing plate  20  is transmitted from the removing device  16  to a platform (not shown). Then, a touch control circuit board  21  is attached on the sensing plate  20  at a part of the first coiled sheet  17  (see Step S 6  and  FIG. 6 ). Consequently, the touch control circuit board  21  and the sensing region  172  are electrically connected with each other. In this embodiment, the touch control circuit board  21  is a flexible printed circuit board (FPC). In addition, the touch control circuit board  21  may be attached on the sensing plate  20  through an anisotropic conductive film (ACF) or any other appropriate adhesive sheet. 
     In this embodiment, the step S 6  is performed by an automatic device such as a robotic arm, but is not limited thereto. Moreover, the type of the touch control circuit board  21  is not restricted. The touch control circuit board  21  as shown in the drawings is presented herein for purpose of illustration and description only. 
     Then, the step S 7  is performed to move the sensing plate  20  and the touch control circuit board  21  to another platform and test whether the sensing plate  20  and the touch control circuit board  21  are normal. 
       FIG. 7  schematically illustrates the combination of the sensing plate, the touch control circuit board and a display panel produced in the touch panel producing method according to the first embodiment of the present invention. If the test result is qualified, a bonding surface of the sensing plate  20  (e.g. a part of the second coiled sheet  18 ) is attached on a display panel  22 . An example of the display panel  22  includes but is not limited to a liquid crystal display panel, an electronic paper display panel or a flexible display panel. 
     Hereinafter, a touch panel producing method according to a second embodiment of the present invention will be illustrated with reference to  FIG. 8 . All of the steps of the touch panel producing method are implemented in a clean room A.  FIG. 8  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a second embodiment of the present invention. As shown in  FIG. 8 , the touch panel producing apparatus  3  comprises a first shaft  31 , a second shaft  32 , a third shaft  33 , a fourth shaft  34 , a take-up roll  35 , a first roller assembly  36 , a second roller assembly  37 , a third roller assembly  38 , a cutting device  39 , a washing device  40 , and a removing device  41 . 
     A first coiled sheet  42  is sheathed around the first shaft  31 . A second coiled sheet  43  is sheathed around the second shaft  32 . The first coiled sheet  42  comprises a plastic substrate  420 , plural sensing regions  421 , and a thin film  422 . The plural sensing regions  421  are formed on a first surface of the plastic substrate  420 , and the thin film  422  is disposed on a second surface of the plastic substrate  420  (see  FIG. 10 ). The structures of the first coiled sheet  42  and the second coiled sheet  43  of this embodiment are identical to those of the first coiled sheet  17  and the second coiled sheet  18  of the first embodiment, and are not redundantly described herein. 
     Moreover, a third coiled sheet  44  is sheathed around the third shaft  33 . The third coiled sheet  44  is a light guide plate. The third coiled sheet  44  is made of polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene terephthalate (PET) or silicon resin, but is not limited thereto. 
     A fourth coiled sheet  45  is sheathed around the fourth shaft  34 . In this embodiment, the fourth coiled sheet  45  is an adhesive sheet such as an optically-clear adhesive sheet (OCA sheet) or a liquid optically-clear adhesive sheet (LOCA sheet), but is not limited thereto. In some other embodiments, the fourth coiled sheet  45  is made of other sticky material. 
     The first roller assembly  36  is arranged downstream of the first shaft  31  and the second shaft  32 . The second roller assembly  37  is arranged downstream of the third shaft  33 . The third roller assembly  38  is arranged downstream of the fourth shaft  34 . The cutting device  39 , the washing device  40 , the removing device  41  and the take-up roll  35  are sequentially arranged downstream of the third roller assembly  38 . The structures and the functions of the cutting device  39 , the washing device  40  and the removing device  41  of this embodiment are identical to those of the cutting device  14 , the washing device  15  and the removing device  16  of the first embodiment, and are not redundantly described herein. 
     It is noted that the components of the touch panel producing apparatus  3  as shown in the drawings are presented herein for purpose of illustration and description only. That is, the constituents of the touch panel producing apparatus  3  and the positions of all components may be varied according to the practical requirements. 
     Hereinafter, the operations of the touch panel producing method according to the second embodiment of the present invention will be illustrated with reference to  FIGS. 9 ,  10 ,  11  and  12 .  FIG. 9  schematically illustrates a flowchart of the touch panel producing method according to a second embodiment of the present invention.  FIG. 10  schematically illustrates a sensing plate section generated in the touch panel producing method according to the second embodiment of the present invention.  FIG. 11  schematically illustrates a sensing plate produced in the touch panel producing method according to the second embodiment of the present invention.  FIG. 12  schematically illustrates the combination of the sensing plate and a touch control circuit board produced in the touch panel producing method according to the second embodiment of the present invention. 
     Firstly, the step S 11  is performed. After the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  are sheathed around the first shaft  31 , the second shaft  32 , the third shaft  33  and the fourth shaft  34 , respectively, the first shaft  31 , the second shaft  32 , the third shaft  33  and the fourth shaft  34  are rotated to transfer the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  in an X direction. Then, the first coiled sheet  42  and the second coiled sheet  43  are transported across the first roller assembly  36 . By the first roller assembly  36 , the first coiled sheet  42  is bonded onto the second coiled sheet  43 , so that the first coiled sheet  42  and the second coiled sheet  43  are laminated together. Then, a laminated structure of the first coiled sheet  42  and the second coiled sheet  43  is transported across the second roller assembly  37 , and the third coiled sheet  44  is also transported across the second roller assembly  37 . By the second roller assembly  37 , the third coiled sheet  44  is bonded onto the second coiled sheet  43 , so that the first coiled sheet  42 , the second coiled sheet  43  and the third coiled sheet  44  are laminated together. Then, the laminated structure of the first coiled sheet  42 , the second coiled sheet  43  and the third coiled sheet  44  is transported across the third roller assembly  38 , and the fourth coiled sheet  45  is also transported across the third roller assembly  38 . By the third roller assembly  38 , the fourth coiled sheet  45  is bonded onto the third coiled sheet  44 , so that the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  are laminated together. Then, a laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is wound around and collected by the take-up roll  35 . 
     When the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is moved in the direction X to the cutting device  39 , the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is cut by the cutting device  39 . Consequently, a sensing plate section  46  that is detachable from other parts of the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is generated (Step S 21 ). As shown in  FIG. 10 , the sensing plate section  46  comprises a part of the first coiled sheet  42  containing the sensing region  421 , a part of the second coiled sheet  43  attached on the first coiled sheet  42 , a part of the third coiled sheet  44  attached on the second coiled sheet  43  and a part of the fourth coiled sheet  45  attached on the third coiled sheet  44 . It is noted that the shape of the sensing plate section  46  is not restricted. According to the practical requirements, the sensing plate section  46  with any desired shape may be cut by the cutting device  39 . Moreover, the profiles and the sizes of the first coiled sheet  42 , the second coiled sheet  43  as shown in  FIG. 10  are presented herein for purpose of illustration and description only, and are not restricted. 
     The laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is continuously moved in the direction X. When the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is moved to the washing device  40 , the contaminants (e.g. dust) which are occurred at the time of cutting task and retained on the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  are cleaned away by the washing device  40  (Step S 31 ). 
     After the washing task is completed, the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is moved to in the direction X. When the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  is moved to the removing device  41 , the sensing plate section  46  is removed from the laminated structure of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45 . After the sensing plate section  46  is removed, a corresponding sensing plate  47  is produced (Step S 41 ). The sensing plate  47  is shown in  FIG. 11 . 
     Then, the sensing plate  47  is transmitted from the removing device  41  to a platform (not shown). Then, a touch control circuit board  48  is attached on the sensing plate  47  at a part of the first coiled sheet  42  (see the step S 51  and  FIG. 12 ). Consequently, the touch control circuit board  48  and the sensing region  421  are electrically connected with each other. 
     Then, the step S 61  is performed to move the sensing plate  47  and the touch control circuit board  48  to another platform and test whether the sensing plate  47  and the touch control circuit board  48  are normal. 
       FIG. 13  schematically illustrates the combination of the sensing plate, the touch control circuit board and a glass plate produced in the touch panel producing method according to the second embodiment of the present invention. If the test result is qualified, a bonding surface of the sensing plate  47  (e.g. a part of the fourth coiled sheet  45 ) is attached on a glass plate  49 . It is noted that the sensing plate  47  of this embodiment may be attached on the display panel  22  of the first embodiment. Alternatively, the sensing plate  20  of the first embodiment may be attached on the glass plate  49  of this embodiment. 
     Hereinafter, a touch panel producing method according to a third embodiment of the present invention will be illustrated with reference to  FIG. 14 .  FIG. 14  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a third embodiment of the present invention. As shown in  FIG. 14 , the touch panel producing apparatus  5  comprises a first shaft  51 , a second shaft  52 , a third shaft  53 , a fourth shaft  54 , a take-up roll  55 , a first roller assembly  56 , a second roller assembly  57 , a third roller assembly  58 , a cutting device  59 , a washing device  60 , and a removing device  61 . Except for the following items, the components and arrangements of the touch panel producing apparatus  5  of this embodiment are substantially identical to those of the touch panel producing apparatus  3  of the second embodiment. 
     A third coiled sheet  64  is sheathed around the first shaft  51 . A second coiled sheet  63  is sheathed around the second shaft  52 . A fourth coiled sheet  65  is sheathed around the third shaft  53 . A first coiled sheet  62  is sheathed around the fourth shaft  54 . The configurations of the first coiled sheet  62 , the second coiled sheet  63 , the third coiled sheet  64  and the fourth coiled sheet  65  of this embodiment are identical to those of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  of the second embodiment. In comparison with the touch panel producing method of the second embodiment, the sequence of attaching the first coiled sheet  62 , the second coiled sheet  63 , the third coiled sheet  64  and the fourth coiled sheet  65  is distinguished. However, the stacking sequence of the first coiled sheet  62 , the second coiled sheet  63 , the third coiled sheet  64  and the fourth coiled sheet  65  is the same as the stacking sequence of the second embodiment. 
     Alternatively, the sequence of attaching the second coiled sheet  63  and the fourth coiled sheet  65  may be exchanged. However, the second shaft  52  and second coiled sheet  63  are still located above the third coiled sheet  64 , and the third shaft  53  and the fourth coiled sheet  65  are still located below the third coiled sheet  64 . 
     Alternatively, the sequence of attaching the fourth coiled sheet  65  and the first coiled sheet  62  may be exchanged. However, the third shaft  53  and the fourth coiled sheet  65  are still located below the third coiled sheet  64 , and the fourth shaft  54  and the first coiled sheet  62  are still located above the third coiled sheet  64 . 
     Hereinafter, a touch panel producing method according to a fourth embodiment of the present invention will be illustrated with reference to  FIG. 15 .  FIG. 15  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a fourth embodiment of the present invention. As shown in  FIG. 15 , the touch panel producing apparatus  7  comprises a first shaft  71 , a second shaft  72 , a third shaft  73 , a fourth shaft  74 , a take-up roll  75 , a first roller assembly  76 , a second roller assembly  77 , a third roller assembly  78 , a cutting device  79 , a washing device  80 , and a removing device  81 . Except for the following items, the components and arrangements of the touch panel producing apparatus  7  of this embodiment are substantially identical to those of the touch panel producing apparatus  3  of the second embodiment. 
     A second coiled sheet  83  is sheathed around the first shaft  71 . A third coiled sheet  84  is sheathed around the second shaft  72 . A first coiled sheet  82  is sheathed around the third shaft  73 . A fourth coiled sheet  85  is sheathed around the fourth shaft  74 . The configurations of the first coiled sheet  82 , the second coiled sheet  83 , the third coiled sheet  84  and the fourth coiled sheet  85  of this embodiment are identical to those of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  of the second embodiment. In comparison with the touch panel producing method of the second embodiment, the sequence of attaching the first coiled sheet  82 , the second coiled sheet  83 , the third coiled sheet  84  and the fourth coiled sheet  85  is distinguished. However, the stacking sequence of the first coiled sheet  82 , the second coiled sheet  83 , the third coiled sheet  84  and the fourth coiled sheet  85  is the same as the stacking sequence of the second embodiment. 
     Alternatively, the sequence of attaching the third coiled sheet  84  and the first coiled sheet  82  may be exchanged. However, the second shaft  72  and the third coiled sheet  84  are still located below the second coiled sheet  83 , and the third shaft  73  and the first coiled sheet  82  are still located above the second coiled sheet  83 . 
     Alternatively, the sequence of attaching the first coiled sheet  82  and the fourth coiled sheet  85  may be exchanged. However, the third shaft  73  and the first coiled sheet  82  are still located above the second coiled sheet  83 , and the fourth shaft  74  and the fourth coiled sheet  85  are still located below the second coiled sheet  83 . 
     Hereinafter, a touch panel producing method according to a fifth embodiment of the present invention will be illustrated with reference to  FIG. 16 .  FIG. 16  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a fifth embodiment of the present invention. As shown in  FIG. 16 , the touch panel producing apparatus  9  comprises a first shaft  91 , a second shaft  92 , a third shaft  93 , a fourth shaft  94 , a take-up roll  95 , a first roller assembly  96 , a second roller assembly  97 , a third roller assembly  98 , a cutting device  99 , a washing device  100 , and a removing device  101 . Except for the following items, the components and arrangements of the touch panel producing apparatus  9  of this embodiment are substantially identical to those of the touch panel producing apparatus  3  of the second embodiment. 
     A fourth coiled sheet  105  is sheathed around the first shaft  91 . A third coiled sheet  104  is sheathed around the second shaft  92 . A second coiled sheet  103  is sheathed around the third shaft  93 . A first coiled sheet  102  is sheathed around the fourth shaft  94 . The configurations of the first coiled sheet  102 , the second coiled sheet  103 , the third coiled sheet  104  and the fourth coiled sheet  105  of this embodiment are identical to those of the first coiled sheet  42 , the second coiled sheet  43 , the third coiled sheet  44  and the fourth coiled sheet  45  of the second embodiment. In comparison with the touch panel producing method of the second embodiment, the sequence of attaching the first coiled sheet  102 , the second coiled sheet  103 , the third coiled sheet  104  and the fourth coiled sheet  105  is distinguished. However, the stacking sequence of the first coiled sheet  102 , the second coiled sheet  103 , the third coiled sheet  104  and the fourth coiled sheet  105  is the same as the stacking sequence of the second embodiment. 
     Hereinafter, a touch panel producing method according to a sixth embodiment of the present invention will be illustrated with reference to  FIG. 17 .  FIG. 17  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a sixth embodiment of the present invention. As shown in  FIG. 17 , the touch panel producing apparatus  1   a  comprises a first shaft  10   a , a second shaft  11   a , a take-up roll  12   a , a first roller assembly  13   a , a cutting device  14   a , a washing device  15   a , a removing device  16   a , and an attaching device  17   a.    
     A first coiled sheet  18   a  is sheathed around the first shaft  10   a . A second coiled sheet  19   a  is sheathed around the second shaft  11   a . The second shaft  11   a  is located above the first shaft  10   a . The configurations of the first coiled sheet  18   a  and the second coiled sheet  19   a  are identical to those of the first coiled sheet  17  and the second coiled sheet  18  of the first embodiment, and are not redundantly described herein. 
     Moreover, the first roller assembly  13   a , the attaching device  17   a , the cutting device  14   a , the washing device  15   a , the removing device  16   a  and the take-up roll  12   a  are sequentially arranged downstream of the first shaft  10   a  and the second shaft  11   a . The cutting device  14   a , the washing device  15   a  and the removing device  16   a  are identical to those of the first embodiment. An example of the attaching device  17   a  is an automatic device such as an ACF machine, but is not limited thereto. 
     Hereinafter, the operations of the touch panel producing method according to the sixth embodiment of the present invention will be illustrated with reference to  FIGS. 18 and 19 .  FIG. 18  schematically illustrates a flowchart of the touch panel producing method according to a sixth embodiment of the present invention.  FIG. 19  schematically illustrates a sensing plate section generated in the touch panel producing method according to the sixth embodiment of the present invention. In comparison with the touch panel producing method of the first embodiment, the step of attaching a touch control circuit board  20   a  is prior to the cutting step. 
     Firstly, the first shaft  10   a  and the second shaft  11   a  are rotated to transfer the first coiled sheet  18   a  and the second coiled sheet  19   a  in an X direction (Step S 1   a  of  FIG. 18 ), and the first coiled sheet  18   a  and the second coiled sheet  19   a  are laminated together by the first roller assembly  13   a  (Step S 2   a  of  FIG. 18 ). 
     Then, a laminated structure of the first coiled sheet  18   a  and the second coiled sheet  19   a  is moved to the attaching device  17   a . By the attaching device  17   a , a touch control circuit board  20   a  is attached on the first coiled sheet  18   a  (Step S 3   a ). In this embodiment, the touch control circuit board  20   a  is a flexible printed circuit board (FPC). In addition, the touch control circuit board  20   a  may be attached on the first coiled sheet  18   a  through an anisotropic conductive film (ACF) or any other appropriate adhesive sheet. 
     Then, the laminated structure of the first coiled sheet  18   a  and the second coiled sheet  19   a  is moved to the cutting device  14   a . The laminated structure of the first coiled sheet  18   a  and the second coiled sheet  19   a  is cut by the cutting device  14   a . Consequently, a sensing plate section  21   a  is generated (Step S 4   a ). 
     As shown in  FIG. 19 , the sensing plate section  21   a  (as shown in dotted lines) comprises a part of the first coiled sheet  18   a , a part of the second coiled sheet  19   a  attached on the first coiled sheet  18   a , and the touch control circuit board  20   a  attached on the first coiled sheet  18   a . It is noted that the shape of the sensing plate section  21   a  is not restricted. According to the practical requirements, the sensing plate section  21   a  with any desired shape may be cut by the cutting device  14   a . Moreover, the profiles and the sizes of the first coiled sheet  18   a  and the second coiled sheet  19   a  as shown in  FIG. 19  are presented herein for purpose of illustration and description only and are not restricted. 
     Then, the laminated structure of the first coiled sheet  18   a  and the second coiled sheet  19   a  and the touch control circuit board  20   a  are moved to the washing device  15   a , and the retained contaminants are cleaned away by the washing device  15   a  (Step S 5   a ). Then, the laminated structure of the first coiled sheet  18   a  and the second coiled sheet  19   a  and the touch control circuit board  20   a  are moved to the removing device  16   a , and the sensing plate section  21   a  is removed by the removing device  16   a . Consequently, a corresponding sensing plate is produced (Step S 6   a ). The structure of the sensing plate of this embodiment is identical to that of the sensing plate of  FIG. 6 , and is not redundantly described herein. 
     Then, the step S 7   a  is performed to transmit the sensing plate from the removing device  16   a  to a platform (not shown) and test whether the sensing plate is normal. If the test result is qualified, a bonding surface of the sensing plate (e.g. a part of the second coiled sheet  19   a ) is attached on a display panel or a glass plate. 
     Hereinafter, a touch panel producing method according to a seventh embodiment of the present invention will be illustrated with reference to  FIG. 20 .  FIG. 20  schematically illustrates a touch panel producing apparatus for implementing a touch panel producing method according to a seventh embodiment of the present invention. 
     As shown in  FIG. 20 , the touch panel producing apparatus  3   a  comprises a first shaft  31   a , a second shaft  32   a , a third shaft  33   a , a fourth shaft  34   a , a take-up roll  35   a , a first roller assembly  36   a , a second roller assembly  37   a , a third roller assembly  38   a , a cutting device  39   a , a washing device  40   a , a removing device  41   a , and an attaching device  42   a.    
     A fourth coiled sheet  46   a  is sheathed around the first shaft  31   a . A third coiled sheet  45   a  is sheathed around the second shaft  32   a . A second coiled sheet  44   a  is sheathed around the third shaft  33   a . A first coiled sheet  43   a  is sheathed around the fourth shaft  34   a . The configurations of the third coiled sheet  45   a  and the fourth coiled sheet  46   a  are identical to those of the third coiled sheet  44  and the fourth coiled sheet  45  of the second embodiment, and the configurations of the first coiled sheet  43   a  and the second coiled sheet  44   a  are identical to those of the first coiled sheet  17  and the second coiled sheet  18  of the first embodiment, and are not redundantly described herein. 
     The first roller assembly  36   a  is arranged downstream of the first shaft  31   a  and the second shaft  32   a . The second roller assembly  37   a  is arranged downstream of the third shaft  33   a . The third roller assembly  38   a  is arranged downstream of the fourth shaft  34   a . The attaching device  42   a , the cutting device  39   a , the washing device  40   a , the removing device  41   a  and the take-up roll  35   a  are sequentially arranged downstream of the third roller assembly  38   a . The structures and the functions of the cutting device  39   a , the washing device  40   a  and the removing device  41   a  of this embodiment are identical to those of the first embodiment, and the structures and the functions of the attaching device  42   a  are identical to those of the sixth embodiment, and are not redundantly described herein. 
     Hereinafter, the operations of the touch panel producing method according to the seventh embodiment of the present invention will be illustrated with reference to  FIGS. 21 and 22 .  FIG. 21  schematically illustrates a flowchart of the touch panel producing method according to a seventh embodiment of the present invention.  FIG. 22  schematically illustrates a sensing plate section generated in the touch panel producing method according to the seventh embodiment of the present invention. In comparison with the touch panel producing method of the second embodiment, the step of attaching a touch control circuit board  47   a  is prior to the cutting step. 
     Firstly, the step S 11   a  is performed. After the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  are sheathed around the first shaft  31   a , the second shaft  32   a , the third shaft  33   a  and the fourth shaft  34   a , respectively, the first shaft  31   a , the second shaft  32   a , the third shaft  33   a  and the fourth shaft  34   a  are rotated to transfer the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  in an X direction. Then, the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  are laminated together by the first roller assembly  36   a , the second roller assembly  37   a  and the third roller assembly  38   a.    
     Then, a laminated structure of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  is moved to the attaching device  42   a . By the attaching device  42   a , a touch control circuit board  47   a  is attached on the first coiled sheet  43   a  (Step S 21   a ). In this embodiment, the touch control circuit board  47   a  is a flexible printed circuit board (FPC). In addition, the touch control circuit board  47   a  may be attached on the first coiled sheet  43   a  through an anisotropic conductive film (ACF) or any other appropriate adhesive sheet. 
     Then, the laminated structure of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  is moved to the cutting device  39   a . The laminated structure of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  is cut by the cutting device  39   a . Consequently, a sensing plate section  48   a  is generated (Step S 31   a ). 
     As shown in  FIG. 22 , the sensing plate section  48   a  (as shown in dotted lines) comprises a part of the first coiled sheet  43   a , a part of the second coiled sheet  44   a  attached on the first coiled sheet  43   a , a part of the third coiled sheet  45   a  attached on the second coiled sheet  44   a , a part of the fourth coiled sheet  46   a  attached on the third coiled sheet  45   a , and the touch control circuit board  47   a  attached on the first coiled sheet  43   a . It is noted that the shape of the sensing plate section  48   a  is not restricted. According to the practical requirements, the sensing plate section  48   a  with any desired shape may be cut by the cutting device  39   a . Moreover, the profiles and the sizes of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  as shown in  FIG. 22  are presented herein for purpose of illustration and description only and are not restricted. 
     Then, the laminated structure of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  and the touch control circuit board  47   a  are moved to the washing device  40   a , and the retained contaminants are cleaned away by the washing device  40   a  (Step S 41   a ). Then, the laminated structure of the first coiled sheet  43   a , the second coiled sheet  44   a , the third coiled sheet  45   a  and the fourth coiled sheet  46   a  and the touch control circuit board  47   a  are moved to the removing device  41   a , and the sensing plate section  41   a  is removed by the removing device  41   a . Consequently, a corresponding sensing plate is produced (Step S 51   a ). The structure of the sensing plate of this embodiment is identical to that of the sensing plate of  FIG. 12 , and is not redundantly described herein. 
     Then, the step S 61   a  is performed to transmit the sensing plate from the removing device  41   a  to a platform (not shown) and test whether the sensing plate is normal. If the test result is qualified, a bonding surface of the sensing plate (e.g. a part of the fourth coiled sheet  46   a ) is attached on a display panel or a glass plate. 
     From the above descriptions, the present invention provides a touch panel producing method. After plural coiled sheets are attached on each other by a roll-to-roll process, automatic devices are used to performing a cutting task, a removing task, a task of attaching a touch control circuit board, a cleaning task and a testing task. Consequently, a touch panel is fabricated. In other words, the touch panel producing method of the present invention can be automatically implemented without the manual attaching procedures. 
     While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.