Abstract:
A touch panel for a touch sensitive liquid crystal display is disclosed. The touch panel is a multiplier expandable with a combination of two or more independent basic conductive patterns. The combination of basic conductive patterns devised for a touch panel made the display profile diversified as building blocks. Different display profile can be made including but not limited to landscape, portrait, L, T, U, C, Z, N, and cross. The combination of basic conductive patterns devised for a touch panel also simplifies the structure of a touch sensitive expandable display system and therefore shorten the timing for developing new large touch sensitive display products.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present invention relates to a touch panel for a touch sensitive liquid crystal display. Especially for a multiplier expandable touch panel with a combination of two or more independent basic conductive pattern. 
         [0003]    2. Description of Related Art 
         [0004]      FIG. 1  is a first prior art 
         [0005]      FIG. 1  shows a touch sensitive display system for a prior art. A touch panel  11  is configured on a bottom side of a protective cover glass  10 . A liquid crystal display  12  is configured on the bottom side of the touch panel  11 . The protective cover glass  10 , touch panel  11 , and liquid crystal display  12  have a similar size which is approximately with a width W and a height H. A touch panel controller  15  is electrically coupled to the touch panel  11 . An operation system  18  has a first end electrically coupled to the touch panel controller  15  and has a second end electrically coupled to the liquid crystal display  12 . 
         [0006]      FIG. 2  is a conductive pattern for the touch panel of  FIG. 1   
         [0007]      FIG. 2  shows a plurality of conductive diamond  11 X serially connected in a latitudinal direction to form X circuit  14 , and a plurality of conductive diamond  11 Y serially connected in a longitudinal direction to form Y circuit  13 . The plurality of latitudinal diamond string interlocks with the plurality of longitudinal string but electrically isolated from each other within the touch panel. 
         [0008]    The X circuit  14  and Y circuit  13  can be either made on the same surface or different surface on the touch panel. When the X circuit  14  and Y circuit  13  are made on the same surface, an electric isolation is configured between the cross point to isolate the two circuit. When the X circuit  14  is made on a first surface of the touch panel and Y circuit  13  is made on the second surface of the touch panel, the touch panel substrate functions as an electric isolation therebetween. 
         [0009]      FIG. 3  is a display system for the prior art of  FIG. 1   
         [0010]      FIG. 3  shows a display system equivalent to  FIG. 1  but from a different view. 
         [0011]      FIG. 3  shows a conductive pattern  11 P configured on the touch panel  11 . The conductive pattern  11 P is composed of latitudinal X circuit  14  and longitudinal Y circuit  13 . The X circuit  14  and the Y circuit  13  are electrically coupled to the touch panel controller  15 . The controller  15  is then electrically coupled to the operation system  18 . The operation system  18  is electrically coupled to the liquid crystal display  12 . 
         [0012]      FIG. 4  is a display system equivalent to the prior art of  FIG. 3   
         [0013]      FIG. 4  shows a display system equivalent to  FIG. 3  but from a different view.  FIG. 4  shows a matrix circuit with a plurality of latitudinal X circuit  14  and a plurality of longitudinal Y circuit  13  configured on the touch panel  11 . The matrix circuit is electrically coupled to the touch panel controller  15 . The controller  15  is then electrically coupled to the operation system  18 . The operation system  18  is electrically coupled to the liquid crystal display  12 . 
         [0014]      FIG. 5  is a second prior art 
         [0015]      FIG. 5  shows a touch sensitive display system of a prior.  FIG. 5  shows a touch panel  112  for the display is double sized in width 2 W while keep the height H still the same as that of  FIG. 1 . A liquid crystal display  122  with an approximate profile or view area is configured on the bottom side of the touch panel  112 . A touch panel controller  152  is electrically coupled to the touch panel  112 . An operation system  182  has a first end electrically coupled to the touch panel controller  152  and has a second end electrically coupled to the liquid crystal display  122 . 
         [0016]      FIG. 6  is a conductive pattern for the touch panel of  FIG. 5   
         [0017]      FIG. 6  shows a new conductive pattern suitable for the larger touch panel  112  which has a width of 2 W as compared with the touch panel  11  of  FIG. 1 , as an example, needs to be redesigned.  FIG. 6  shows that a plurality of conductive diamond serially connected in a latitudinal direction forms X circuit  142 , and a plurality of conductive diamond serially connected in a longitudinal direction forms Y circuit  132 . The plurality of latitudinal diamond string interlocks with the plurality of longitudinal diamond string. The X circuit  142  and Y circuit  132  are electrically coupled to the touch panel controller  152 . The controller  152  is then electrically coupled to the operation system  182 . The operation system  182  is electrically coupled to the liquid crystal display  122 . 
         [0018]    The disadvantage for the prior art is that a new touch panel, new touch panel controller and new operation system need to be designed for a new display which has a different size. It is time-consuming in the re-design for those elements. It is a long desire for a research engineer to simplify the design and timing for a new product. 
         [0019]      FIG. 7  is a display system for the prior art of  FIG. 6   
         [0000]      FIG. 7  shows a display system of  FIG. 6  but from a different view.  FIG. 7  shows a matrix circuit of X circuit  142  and Y circuit  132  on the touch panel  112 . The matrix circuit is electrically coupled to the touch panel controller  152 . The controller  152  is then electrically coupled to the operation system  182 . The operation system  182  is electrically coupled to the liquid crystal display  122 . 
         [0020]    If an old component can be modified and re-used for a new product, the redesign job can be simplified and the redesign timing can be shortened. The present invention devises a basic conductive pattern for an expandable touch panel which simplifies the process of redesign for a new larger display, especially for a multiplier expandable display. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0021]      FIG. 1  is a first prior art 
           [0022]      FIG. 2  is a conductive pattern for the touch panel of  FIG. 1   
           [0023]      FIG. 3  is a display system for the prior art of  FIG. 1   
           [0024]      FIG. 4  is a display system equivalent to the prior art of  FIG. 3   
           [0025]      FIG. 5  is a second prior art 
           [0026]      FIG. 6  is a conductive pattern for the touch panel of  FIG. 5   
           [0027]      FIG. 7  is a display system for the prior art of  FIG. 6   
           [0028]      FIG. 8  is a basic conductive pattern for a touch panel according to the present invention 
           [0029]      FIG. 9A  is a first embodiment of a touch panel according to the present invention 
           [0030]      FIG. 9B  is a second embodiment of a touch panel according to the present invention 
           [0031]      FIG. 9C  is a third embodiment of a touch panel according to the present invention 
           [0032]      FIG. 10A  is a fourth embodiment of a touch panel according to the present invention 
           [0033]      FIG. 10B  is a fifth embodiment of a touch panel according to the present invention 
           [0034]      FIG. 11A  is a sixth embodiment of a touch panel according to the present invention 
           [0035]      FIG. 11B  is a seventh embodiment of a touch panel according to the present invention 
           [0036]      FIG. 12A  is a eighth embodiment of a touch panel according to the present invention 
           [0037]      FIG. 12B  is a ninth embodiment of a touch panel according to the present invention 
           [0038]      FIG. 13  is a display system for the first embodiment according to the present invention 
           [0039]      FIG. 14  is a system equivalent to the system of  FIG. 13   
           [0040]      FIG. 15  is a system equivalent to the system of  FIG. 13  in a view of touch area 
           [0041]      FIG. 16  is a display system for the second embodiment according to the present invention 
           [0042]      FIG. 17  is a display system for the third embodiment according to the present invention 
           [0043]      FIG. 18  is a second display system for the first embodiment according to the present invention 
           [0044]      FIG. 19  is a second display system for the second embodiment according to the present invention 
           [0045]      FIG. 20  is a second display system for the third embodiment according to the present invention 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0046]      FIG. 8  is a basic conductive pattern for a touch panel according to the present invention 
         [0047]      FIG. 8  is a basic conductive pattern  21 P configured on a top surface of a touch panel  21 . The touch panel  21  has a width W and a height H. The basic conductive pattern  21 P has a plurality of latitudinal conductive pattern  21 X and a plurality of longitudinal conductive pattern  21 Y. The latitudinal conductive pattern  21 X interweaves with the longitudinal conductive pattern  21 Y. The latitudinal conductive pattern  21 X is made electrically isolated with the longitudinal conductive pattern  21 Y within the touch panel  21 . 
         [0048]    Each of the latitudinal conductive patterns  21 X has a first conductive triangle  211  in a first position and a second conductive triangle  212  in a last position. A plurality of conductive diamond  215  is configured in between the first conductive triangle  211  and the last conductive triangle  212 . The conductive diamonds  215  and the conductive triangles  211 ,  212  are serially connected with each apex in a latitudinal direction. 
         [0049]    Each of the longitudinal conductive patterns  21 Y has a third conductive triangle  213  in a first position and a fourth conductive triangle  214  in a last position. A plurality of conductive diamond  216  configured in between the third conductive triangle  213  and the fourth conductive triangle  214 . The conductive diamonds  216  and the conductive triangles  213 ,  214  are serially connected with each apex in a longitudinal direction. 
         [0050]    The latitudinal conductive pattern  21 X and the longitudinal conductive pattern  21 Y are interlocked and electrically isolated with each other. A sensing node  218  is formed in each cross point. 
         [0051]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2. 
         [0052]    The basic conductive pattern of  FIG. 8  facilitates itself to be added one or more basic conductive patterns latitudinally or longitudinally. For example,  FIG. 9A  shows a second basic conductive pattern  21 R is added to the right side of the first basic conductive pattern  21 P.  FIG. 9B  shows a second basic conductive pattern  21 T is added to the top side of the first basic conductive pattern  21 P.  FIG. 9C  shows a second basic conductive pattern  21 R is added to the right side of the first basic conductive pattern  21 P and a third basic conductive pattern  21 T is added to the top side of the first basic conductive pattern  21 P. 
         [0053]      FIG. 9A  is a first embodiment of a touch panel according to the present invention 
         [0054]      FIG. 9A  shows a touch panel  21  devised for a multiplier extended display with a doubled width 2 W and a height H. The touch panel  21  has two basic conductive patterns configured thereon. A boundary  22  without having any electronic element is located between neighboring basic conductive patterns. The touch panel  21  has a first basic conductive pattern  21 P configured on the left side and a second basic conductive pattern  21 R configured on the right side. The first basic conductive pattern  21 P is electrically isolated from the second basic conductive pattern  21 R on the touch panel. The first basic conductive pattern  21 P forms a first touch area, and the second basic conductive pattern  21 R forms a second touch area for a user. The first basic conductive pattern  21 P and the second basic conductive pattern  21 R are configured side by side in a latitudinal direction and electrically isolated with each other, to form a landscape touch panel for a landscape display. 
         [0055]    The first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . The second basic conductive pattern  21 R has a second matrix of sensing nodes  218 . 
         [0056]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2. 
         [0057]      FIG. 9B  is a second embodiment of a touch panel according to the present invention 
         [0058]      FIG. 9B  shows a touch panel  21  devised for a multiplier extended display with a width W and a doubled height  2 H. The touch panel  21  has a first basic conductive pattern  21 P, and a second basic conductive pattern  21 T configured on a top side of the first basic conductive pattern  21 P. The first basic conductive pattern  21 P is electrically isolated from the second basic conductive pattern  21 T on the touch panel. 
         [0059]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2. 
         [0060]    The first basic conductive pattern  21 P forms a first touch area, and the second basic conductive pattern  21 T forms a second touch area for a user. The first basic conductive pattern  21 P and the second basic conductive pattern  21 T are configured side by side in a longitudinal direction and electrically isolated with each other to form a portrait touch panel for a portrait display. 
         [0061]      FIG. 9C  is a third embodiment of a touch panel according to the present invention 
         [0062]      FIG. 9C  shows a touch panel  21  devised for a multiplier extended display which is an L shaped display. The touch panel  21  is triple size extended with a combination of three basic conductive patterns. 
         [0063]      FIG. 9C  shows a first basic conductive pattern  21 P which has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 R which has a second matrix of sensing nodes  218  configured side by side on the right side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 T which has a third matrix of sensing nodes  218  configured on the top side and electrically isolated with the first basic conductive pattern  21 P. 
         [0064]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0065]      FIG. 10A  is a fourth embodiment of a touch panel according to the present invention 
         [0066]      FIG. 10A  shows a touch panel  21  devised for a multiplier extended display with a T shape profile. The touch panel is quadruple size extended with a combination of four basic conductive patterns. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 R having a second matrix of sensing nodes  218  is configured on a right side of the first basic conductive pattern  21 P and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 T having a third matrix of sensing nodes  218  is configured on a top side of the first basic conductive pattern  21 P and electrically isolated with the first basic conductive pattern  21 P. A fourth basic conductive pattern  21 B having a fourth matrix of sensing nodes  218  is configured side by side on a bottom side and electrically isolated with the first basic conductive pattern  21 P. 
         [0067]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0068]      FIG. 10B  is a fifth embodiment of a touch panel according to the present invention 
         [0069]      FIG. 10B  shows a touch panel  21  devised for a T shaped display. The touch panel is quadruple size extended with a combination of four basic conductive patterns. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 R having a second matrix of sensing nodes  218  is configured on a right side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 L having a third matrix of sensing nodes  218  is configured on a left side and electrically isolated with the first basic conductive pattern  21 P. A fourth basic conductive pattern  21 B having a fourth matrix of sensing nodes  218  is configured on a bottom side and electrically isolated with the first basic conductive pattern  21 P. 
         [0070]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0071]      FIG. 11A  is a sixth embodiment of a touch panel according to the present invention 
         [0072]      FIG. 11A  shows a touch panel  21  devised for a multiplier extended display which is quintuple size extended to form a U shaped display. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 R having a second matrix of sensing nodes  218  configured on a right side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 L having a third matrix of sensing nodes  218  configured on a left side and electrically isolated with the first basic conductive pattern  21 P. A fourth basic conductive pattern  21 RT having a fourth matrix of sensing nodes  218  is configured on a top side and electrically isolated with the second basic conductive pattern  21 R. A fifth basic conductive pattern  21 LT having a fifth matrix of sensing nodes  218  is configured on a top side and electrically isolated with the third basic conductive pattern  21 . 
         [0073]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0074]      FIG. 11B  is a seventh embodiment of a touch panel according to the present invention 
         [0075]      FIG. 11B  shows a touch panel  21  devised for a multiplier extended display which is a quintuple size extended to form a C shaped display. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 B having a second matrix of sensing nodes  218  is configured on a bottom side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 BR having a third matrix of sensing nodes  218  is configured on a right side and electrically isolated with the second basic conductive pattern  21 B. A fourth basic conductive pattern  21 T having a fourth matrix of sensing nodes  218  is configured on a top side and electrically isolated with the first basic conductive pattern  21 P. A fifth basic conductive pattern  21 TR having a fifth matrix of sensing nodes  218  is configured on a right side and electrically isolated with the third basic conductive pattern  21 T. 
         [0076]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0077]      FIG. 12A  is a eighth embodiment of a touch panel according to the present invention 
         [0078]      FIG. 12A  shows a touch panel  21  devised for a multiplier extended display which is quintuple size extended to form a Z shaped display. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 B having a second matrix of sensing nodes  218  is configured on a bottom side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 BR having a third matrix of sensing nodes  218  is configured on a right side and electrically isolated with the second basic conductive pattern  21 B. A fourth basic conductive pattern  21  having a fourth matrix of sensing nodes  218  is configured on a top side and electrically isolated with the first basic conductive pattern  21 P. A fifth basic conductive pattern  21 TL having a fifth matrix of sensing nodes  218  is configured on a left side and electrically isolated with the fourth basic conductive pattern  21 T. 
         [0079]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0080]      FIG. 12B  is a ninth embodiment of a touch panel according to the present invention 
         [0081]      FIG. 12B  shows a touch panel  21  devised for a multiplier extended display which has a N shaped profile. The touch panel  21  is quintuple size extended to form a N shaped display. A first basic conductive pattern  21 P has a first matrix of sensing nodes  218 . A second basic conductive pattern  21 R having a second matrix of sensing nodes  218  is configured on a right side and electrically isolated with the first basic conductive pattern  21 P. A third basic conductive pattern  21 RB having a third matrix of sensing nodes  218  is configured on a bottom side and electrically isolated with the second basic conductive pattern  21 R. A fourth basic conductive pattern  21 L having a fourth matrix of sensing nodes  218  is configured on a left side and electrically isolated with the first basic conductive pattern  21 P. A fifth basic conductive pattern  21 LT having a fifth matrix of sensing nodes  218  is configured on a top side and electrically isolated with the fourth basic conductive pattern  21 L. 
         [0082]    A fixed distance d1 is maintained between neighboring sensing nodes  218  in the latitudinal direction; and a fixed distance d2 is maintained between neighboring sensing nodes  218  in the longitudinal direction. Wherein, the distance d1 can be either the same as or different from the distance d2 within the touch panel. 
         [0083]      FIG. 13  is a display system for a landscape display according to the present invention 
         [0084]      FIG. 13  shows a system devised for the landscape display of  FIG. 9A . A first touch panel controller  15 L is electrically coupled to the X circuit  14  and the Y circuit  13  of the first basic conductive pattern  21 L. A second touch panel controller  15 R is electrically coupled to the X circuit  14  and the Y circuit  13  of the second basic conductive pattern  21 R. An operation system  28  has a first end electrically coupled to the first touch panel controller  15 L, a second end electrically coupled to the second touch panel controller  15 R, and a third end electrically coupled to the liquid crystal display  12 . 
         [0085]      FIG. 14  is a system equivalent to the system of  FIG. 13   
         [0086]      FIG. 14  shows a first matrix circuit and a second matrix circuit, each equivalent to one of the conductive pattern  21 L,  21 R of  FIG. 13 . The rest components are the same as that in  FIG. 13 . The first matrix circuit is electrically isolated from the second matrix circuit on the touch panel. 
         [0087]      FIG. 15  is a system equivalent to the system of  FIG. 13  in a view of touch area 
         [0088]      FIG. 15  shows a touch panel  21  has a first basic conductive pattern  21 L and a second basic conductive pattern  21 R configured thereon. The first basic conductive pattern  21 L forms a first touch area. The second basic conductive pattern  21 R forms a second touch area. The rest elements are the same as that of  FIG. 14 . 
         [0089]      FIG. 16  is a display system for a portrait display according to the present invention. 
         [0090]      FIG. 16  shows a touch panel  21  devised for a multiplier extended display which is a portrait display. A touch panel  21  has a first basic conductive pattern  21 T which forms a first touch area; a second basic conductive pattern  21 P which forms a second touch area. A first touch panel controller  15 T is electrically coupled to the first basic conductive pattern  21 T. A second touch panel controller  15 P is electrically coupled to the second basic conductive pattern  21 P. An operation system  38  has a first end electrically coupled to the first touch panel controller  15 T, a second end electrically coupled to the second touch panel controller  15 P; and a third end electrically coupled to the liquid crystal display  12 . 
         [0091]      FIG. 17  is a display system for the third embodiment according to the present invention 
         [0092]      FIG. 17  shows a touch panel  21  devised for a multiplier extended display which is an L shaped display. A first basic conductive pattern  21 P which forms a first touch area; a second basic conductive pattern  21 R which forms a second touch area. A third basic conductive pattern  21 T which forms a third touch area. A first touch panel controller  15 P is electrically coupled to the first basic conductive pattern  21 P. A second touch panel controller  15 R is electrically coupled to the second basic conductive pattern  21 R. A third touch panel controller  15 T is electrically coupled to the third basic conductive pattern  21 T. An operation system  48 B has a first end electrically coupled to the first touch panel controller  15 P, a second end electrically coupled to the second touch panel controller  21 R, a third end electrically coupled to the third touch panel controller  15 T. A liquid crystal display  12  is electrically coupled to the operation system  48 B. 
         [0093]      FIG. 18  is a second display system for the first embodiment according to the present invention 
         [0094]      FIG. 18  shows a second display system for the landscape display. The difference between  FIG. 18  and  FIG. 15  is on the touch panel controller.  FIG. 15  shows that the first touch panel controller  15 L and the second touch panel controller  15 R are parallelly coupled to the operation system  28 . However,  FIG. 18  shows that the first touch panel controller  15 L and the second touch panel controller  15 R are serially coupled before coupled to the operation system  28 B. A first touch panel controller  15 L electrically coupled to the first basic conductive pattern  21 L. A second touch panel controller  15 R has a first end electrically coupled to the first touch panel controller  15 L, and having a second end electrically coupled to the second basic conductive pattern  21 R. An operation system  28 B has a first end electrically coupled to the second touch panel controller  15 R and had a second end electrically coupled to the liquid crystal display  12 . The first touch panel controller  15 L is a slave controller; and the second touch panel controller  15 R is a master controller. 
         [0095]      FIG. 19  is a second display system for the second embodiment according to the present invention 
         [0096]      FIG. 19  shows a second display system for the portrait display. The difference between  FIG. 19  and  FIG. 16  is on the touch panel controller.  FIG. 16  shows that the first touch panel controller  15 T and the second touch panel controller  15 P are parallelly coupled to the operation system  28 . However,  FIG. 19  shows that the first touch panel controller  15 P and the second touch panel controller  15 T are serially coupled. 
         [0097]    A first touch panel controller  15 P is electrically coupled to the first basic conductive pattern  21 P. A second touch panel controller  15 T has a first end electrically coupled to the second basic conductive pattern  21 T and having a second end electrically coupled to the first touch panel controller  15 P. An operation system  38 B is electrically coupled to the first touch panel controller  15 P. A liquid crystal display  12  is electrically coupled to the operation system  38 B. The first touch panel controller  15 P is a master controller and the second touch panel controller  15 T is a slave controller. 
         [0098]      FIG. 20  is a second display system for the third embodiment according to the present invention 
         [0099]      FIG. 20  shows a second display system for the L shaped display. The difference between  FIG. 20  and  FIG. 17  is on the touch panel controller.  FIG. 17  shows that the first touch panel controller  15 P, the second touch panel controller  15 R, and the third touch panel  15 T are parallelly coupled to the operation system. However,  FIG. 20  shows that the first touch panel controller  15 P, the second touch panel controller  15 R, and the third touch panel controller  15 T are serially coupled before the second one being coupled to the operation system  48 B. 
         [0100]    A first touch panel controller  15 P is electrically coupled to the first basic conductive pattern  21 P. A second touch panel controller  15 R is electrically coupled to the second basic conductive pattern  21 R. A third touch panel controller  15 T is electrically coupled to the third basic conductive pattern  21 T. The third touch panel controller  15 T has a first end electrically coupled to the first touch panel controller  15 P and has a second end electrically coupled to the second touch panel controller  15 R. The second and the third touch panel controllers  15 R,  15 T are slave controllers and the first touch panel controller  15 P is a master controller. 
         [0101]    While several embodiments have been described by way of example, it will be apparent to those skilled in the art that various modifications may be configured without departing from the spirit of the present invention. Such modifications are all within the scope of the present invention, as defined by the appended claims.