Abstract:
A touch display apparatus includes a first substrate including first and second surfaces, a second substrate having a side facing the second surface and provided with a pixel electrode layer, an insulator layer and a common electrode layer, and a liquid crystal (LC) layer disposed between the first and second substrates. The second surface is provided with opening areas, a non-opening area surrounding the opening areas, a black matrix layer, a color filter layer, a protection layer, a touch electrode layer, first and second flat layers, and a patterned viewing angle control transparent electrode layer including control electrode members disposed corresponding to the opening areas, first connection electrode members disposed corresponding to the non-opening area in a first direction and connected to the control electrode members, and second connection electrode members disposed corresponding to the non-opening area in a second direction and connected to the first connection electrode members.

Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATION 
       [0001]    This application claims the benefit of priority under 35 U.S.C. §119(a) to Taiwan Patent Application No. 105115700, filed in Taiwan, R.O.C. on May 20, 2016. The entire content of the above identified application is incorporated herein by reference. 
         [0002]    Some references, which may include patents, patent applications and various publications, are cited and discussed in the description of this disclosure. The citation and/or discussion of such references is provided merely to clarify the description of the present disclosure and is not an admission that any such reference is “prior art” to the disclosure described herein. All references cited and discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference. 
       FIELD 
       [0003]    The present disclosure relates to a display apparatus, and more particularly to a touch display apparatus. 
       BACKGROUND 
       [0004]    With the development of panel technologies, at present, many commercially available displays or mobile apparatuses have a touch function. Generally speaking, at present, touch panels are mainly implemented by using an on-cell technology, an out-cell technology or an in-cell technology. As the name implies, for touch panels using the on-cell technology and the out-cell technology, a touch element is integrated outside a panel. For a touch panel using the in-cell technology, in a stage of panel engineering, a touch element fabricated together in the panel, and therefore, as compared with the touch panels using the on-cell technology and the out-cell technology, the touch panel using the in-cell technology has advantages of being lightweight and thin; however, the in-cell technology involves relatively high difficulty. Therefore, at present, many technical persons are doing related research. 
         [0005]    In addition, as mobile apparatuses become popular, users use smart phones or tablet computers much more often in public places. However, in crowded places (for example, on a crowded bus or on in a metro train), it is very difficult to prevent others from seeing information on a screen when a mobile apparatus is used to read personal messages, and in this case, in consideration of privacy, a touch apparatus having an anti-peeping function is certainly needed. At present, an adhesion-type anti-peeping patch is commercially available. Although the anti-peeping patch is adhered on a surface of a screen of the mobile apparatus to achieve an anti-peeping effect, display brightness of the screen is greatly reduced, and viewing experience is still reduced even if nobody is around peeping. 
       SUMMARY 
       [0006]    The present disclosure provides a touch display apparatus. The touch display apparatus is integrated with an anti-peeping technology to achieve light weight and small thickness as well as relatively desirable display quality. 
         [0007]    The present disclosure proposes a touch display apparatus, which includes a first substrate and a second substrate disposed opposite to each other and a liquid crystal (LC) layer disposed between the first substrate and the second substrate. The first substrate has a first surface and a second surface. A plurality of opening areas and one non-opening area surrounding the opening areas are provided on the second surface of the first substrate, and a black matrix layer, a color filter layer, a protection layer, a touch electrode layer, a first flat layer, a patterned viewing angle control transparent electrode layer, and a second flat layer are further provided on the second surface of the first substrate. The patterned viewing angle control transparent electrode layer is disposed on the first flat layer and has a plurality of control electrode members, a plurality of first connection electrode members, and a plurality of second connection electrode members. The control electrode members are disposed corresponding to the opening areas. The first connection electrode members are disposed corresponding to the non-opening area and extending in a first direction setting and are electrically connected to the control electrode members. The second connection electrode members are disposed corresponding to the non-opening area and extending in a second direction and are electrically connected to the first connection electrode members. The second substrate has a side adjacent to the second surface of the first substrate, and includes a pixel electrode layer, an insulator layer, and a common electrode layer that are disposed on the side. The insulator layer is disposed between the pixel electrode layer and the common electrode layer. 
         [0008]    In the present disclosure, a patterned viewing angle control transparent electrode layer is integrally disposed inside a touch display apparatus. A location of the patterned viewing angle control transparent electrode layer disposed corresponding to the touch display apparatus and thickness of a flat layer are adjusted to achieve relatively desirable LC efficiency. Therefore, when a voltage is applied on the patterned viewing angle control transparent electrode layer, rotation of LC can be controlled to achieve efficacy of anti-peeping. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    The disclosure will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the disclosure. 
           [0010]      FIG. 1  is a schematic view of a touch display apparatus according to the present disclosure. 
           [0011]      FIG. 2A  is a top view of a black matrix layer according to an embodiment of the present disclosure. 
           [0012]      FIG. 2B  is a top view of a touch electrode layer disposed on the black matrix layer according to the present disclosure. 
           [0013]      FIG. 2C  is a top view of a first substrate according to an embodiment of the present disclosure. 
           [0014]      FIG. 3A  is a schematic sectional view of the first substrate along a sectional line A 1 -A 2  in  FIG. 2C  according to an embodiment of the present disclosure. 
           [0015]      FIG. 3B  is a schematic sectional view of the first substrate along a sectional line A 1 -A 2  in  FIG. 2C  according to a variant embodiment of the present disclosure. 
           [0016]      FIG. 4A  is a top view of a black matrix layer according to another embodiment of the present disclosure. 
           [0017]      FIG. 4B  is a top view of a touch electrode layer disposed on the black matrix layer according to another embodiment of the present disclosure. 
           [0018]      FIG. 4C  is a top view of a metal layer disposed on the touch electrode layer and the black matrix layer according to an embodiment of the present disclosure. 
           [0019]      FIG. 4D  is a top view of a first substrate of another embodiment of the present disclosure. 
           [0020]      FIG. 5A  is a schematic sectional view of the first substrate along a sectional line B 1 -B 2  in  FIG. 4D  according to another embodiment of the present disclosure. 
           [0021]      FIG. 5B  is a schematic sectional view of the first substrate along a sectional line B 1 -B 2  in  FIG. 4D  according to another variant embodiment of the present disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0022]      FIG. 1  is a schematic view of a touch display apparatus according to the present disclosure. A touch display apparatus  10  includes a first substrate  100 , a second substrate  120  disposed opposite to the first substrate  100 , and an LC layer  130  sandwiched between the first substrate  100  and the second substrate  120 . A pixel electrode layer  121 , an insulator layer  122 , and a common electrode layer  123  are disposed on a side, facing a second surface  100   b  of the first substrate  100 , of the second substrate  120 . The insulator layer  122  is disposed between the pixel electrode layer  121  and the common electrode layer  123 . In this embodiment, the common electrode layer  123  is disposed on the second substrate  120  and the pixel electrode layer  121  is disposed on the insulator layer  122 . Alternatively, the pixel electrode layer  121  is disposed on the second substrate  120  and the common electrode layer  123  is disposed on the insulator layer  122 ; however, the present disclosure is not limited thereto. For description of a detailed structure of the first substrate  100 , refer to subsequent drawings and description. 
         [0023]      FIG. 2A  is a top view of a black matrix layer according to an embodiment of the present disclosure.  FIG. 2B  is a top view of a touch electrode layer disposed on the black matrix layer according to the present disclosure.  FIG. 2C  is a top view of a first substrate of an embodiment of the present disclosure.  FIG. 3A  is a schematic sectional view of the first substrate along a sectional line A 1 -A 2  in  FIG. 2C  according to an embodiment of the present disclosure. Referring to both  FIG. 2A  and  FIG. 3A , the first substrate  200  has a first surface  200   a  and a second surface  200   b . A plurality of opening areas  201  and a non-opening area  202  are defined on the second surface  200   b  of the first substrate  200 , and the non-opening area  202  surrounds the plurality of opening areas  201 . The black matrix layer  210  is disposed on the second surface  200   b  of the first substrate  200 , where the black matrix layer  210  is disposed corresponding to the non-opening area  202  to surround the plurality of opening areas  201 . Next, as shown in  FIG. 3A , a color filter layer  220  is disposed on the second surface  200   b  of the first substrate  200  corresponding to the opening areas  201 , and is partially located at an edge, adjacent to the opening areas  201 , of the black matrix layer  210 ; however, the present disclosure is not limited thereto. Specifically, the color filter layer  220  in this embodiment may include a red filter layer, a green filter layer, and a blue filter layer (not shown). The red filter layer, the green filter layer, and the blue filter layer are respectively disposed corresponding to the opening areas  201  of the first substrate  200  respectively by using an island type. Edges of the red filter layer, the green filter layer, and the blue filter layer are partially overlapped with the edge of the black matrix layer  210  respectively. Subsequently, a protection layer  230  is disposed on the black matrix layer  210  and the color filter layer  220 . A material of the protection layer  230  may be an organic insulation material, an inorganic insulation material or a combination of the foregoing materials. Next, referring to  FIG. 2B ,  FIG. 2C , and  FIG. 3A  together, the touch electrode layer  240  is disposed on the protection layer  230  corresponding to the non-opening area  202 . A material of the touch electrode layer  240  may be indium tin oxide (ITO), indium zinc oxide (IZO), metal or another suitable transparent conductive material. In this embodiment, the touch electrode layer  240  includes a plurality of first touch electrodes  240   a  and a plurality of second touch electrodes  240   b . The plurality of first touch electrodes  240   a  may be sensing touch electrodes and the plurality of second touch electrodes  240   b  may be driving touch electrodes; alternatively, the plurality of first touch electrodes  240   a  may be driving touch electrodes and the plurality of second touch electrodes  240   b  may be sensing touch electrodes. In addition, this embodiment may also further include disposing another touch conductive layer (not shown) on the touch electrode layer  240 ; however, the present disclosure is not limited thereto. A person skilled in the art may consider a value of a touch capacitance during design to decide whether to dispose another touch conductive layer. In certain embodiments, the touch electrode layer  240  may be formed of metal covered with ITO or IZO. With the composite structure, the capacitance may be adjusted. Next, as shown in  FIG. 3A , a first flat layer  251  is disposed on the touch electrode layer  240  and the protection layer  230 . In this embodiment, the color filter layer  220  using an island-type design may save a cost of the color filter layer, and for an uneven thickness of the color filter layer  220 , a problem of uneven film thickness may be mitigated by fabricating the touch electrode layer  240  and the first flat layer  251  subsequently. However, the present disclosure is not limited thereto, and a person skilled in the art may adjust, according to a design consideration, a manner of fabricating the color filter layer. Subsequently, referring to both  FIG. 2C  and  FIG. 3A , a patterned viewing angle control transparent electrode layer  260  is disposed on the first flat layer  251 . A material of the patterned viewing angle control transparent electrode layer  260  may be indium tin oxide (ITO), indium zinc oxide (IZO) or another suitable transparent conductive material. In this embodiment, the patterned viewing angle control transparent electrode layer  260  has a plurality of control electrode members  263 , a plurality of first connection electrode members  261 , and a plurality of second connection electrode members  262 . The control electrode members  263  are disposed corresponding to the opening areas  201 . The first connection electrode members  261  are disposed corresponding to the non-opening area  202  and extending in a first direction X and are electrically connected to the plurality of control electrode members  263 . The second connection electrode members  262  are disposed corresponding to the non-opening area  202  and extending in a second direction Y and are electrically connected to the plurality of first connection electrode members  261 . The first direction X and the second direction Y are directions intersecting with each other. The patterned viewing angle control transparent electrode layer  260  further includes a plurality of transparent bridging lines  264 . The transparent bridging lines  264  are electrically insulated from the control electrode members  263 , the first connection electrode members  261 , and the second connection electrode members  262 . The transparent bridging lines  264  are disposed between any adjacent two of the first connection electrode members  261  and are electrically connected to any adjacent two of the second touch electrodes  240   b  of the touch electrode layer  240 . Finally, referring to  FIG. 3A , a second flat layer  252  is disposed on the patterned viewing angle control transparent electrode layer  260  and the first flat layer  251 . A thickness of the second flat layer  252  is at least 3 micrometers, so as to present relatively desirable LC efficiency. 
         [0024]    For the first substrate  200  according to the embodiment of the present disclosure, in the present disclosure, the touch electrode layer  240  and the patterned viewing angle control transparent electrode layer  260  are both integrated on the first substrate  200 , and the patterned viewing angle control transparent electrode layer  260  is used to fabricate the transparent bridging lines  264 , the control electrode members  263 , the first connection electrode members  261 , and the second connection electrode members  262  together to remove a procedure. In this example, the transparent bridging lines  264  are used to transfer a signal between the second touch electrodes  240   b , and the control electrode members  263 , the first connection electrode members  261 , and the second connection electrode members  262  are used to transfer a signal of a common electrode layer  123  of a second substrate  120 . 
         [0025]    Referring to both  FIG. 1  and  FIG. 3A , when a voltage difference is applied between the common electrode layer  123  and the pixel electrode layer  121 , the LC layer  130  may be controlled to generate a different grayscale. When a voltage difference is applied between the patterned viewing angle control transparent electrode layer  260  and the common electrode layer  123 , the LC layer  130  may be further controlled to reduce a viewing angle of the touch display apparatus  10  to enter an anti-peeping mode. When there is no voltage difference between the patterned viewing angle control transparent electrode layer  260  and the common electrode layer  123 , the viewing angle of the touch display apparatus  10  is kept normal to stay in a normal mode. In this example, when a gap between the patterned viewing angle control transparent electrode layer  260  and the LC layer  130  is at least 3 micrometers, relatively desirable LC efficiency can be kept, that is, the thickness of the second flat layer  252  is at least 3 micrometers. 
         [0026]      FIG. 3B  is a schematic sectional view of the first substrate along a sectional line A 1 -A 2  in a variant embodiment of the present disclosure.  FIG. 3B  is a variant embodiment of  FIG. 3A , and same element symbols and detailed description are not elaborated herein. Only corresponding differences are described below. As shown in  FIG. 3B , the color filter layer  220  is disposed on the patterned viewing angle control transparent electrode layer  260  and the first flat layer  251  corresponding to the opening areas  201  and the non-opening area  202 ; however, the present disclosure is not limited thereto. Specifically, the color filter layer  220  in this embodiment may include a red filter layer, a green filter layer, and a blue filter layer (not shown). The red filter layer, the green filter layer, and the blue filter layer are respectively disposed by using a strip type respectively in parallel in the first direction X or the second direction Y (refer to  FIG. 2C ). Edges of the red filter layer, the green filter layer, and the blue filter layer are partially overlapped with each other respectively in a direction of a vertical projection of the black matrix layer  210 . Next, the second flat layer  252  is disposed on the color filter layer  220 . In this embodiment, a total thickness of the color filter layer  220  and the second flat layer  252  is at least 3 micrometers to keep relatively desirable LC efficiency. In this embodiment, the color filter layer  220  uses a strip design, so that flatness of a film layer may be improved, to prevent that a subsequent thickness of the second flat layer  252  is insufficient to affect flatness of the second flat layer  252 . However, the present disclosure is not limited thereto, and a person skilled in the art may adjust, according to a design consideration, a manner of fabricating the color filter layer. In the variant embodiment of the present disclosure, the color filter layer  220  is disposed between the patterned viewing angle control transparent electrode layer  260  and the second flat layer  252 , so as to reduce the thickness of the second flat layer  252  to reduce vapor infiltration to avoid formation of LC bubbles. 
         [0027]      FIG. 4A  is a top view of a black matrix layer according to another embodiment of the present disclosure.  FIG. 4B  is a top view of a touch electrode layer disposed on the black matrix layer according to another embodiment of the present disclosure.  FIG. 4C  is a top view of a metal layer disposed on the touch electrode layer and the black matrix layer according to an embodiment of the present disclosure.  FIG. 4D  is a top view of a first substrate according to another embodiment of the present disclosure.  FIG. 5A  is a schematic sectional view of the first substrate along a sectional line B 1 -B 2  in  FIG. 4D  according to another embodiment of the present disclosure. Referring to  FIG. 4A  and  FIG. 5A , the first substrate  300  has a first surface  300   a  and a second surface  300   b . A plurality of opening areas  301  and a non-opening area  302  are defined on the second surface  300   b  of the first substrate  300 , and the non-opening area  302  surrounds the plurality of opening areas  301 . The black matrix layer  310  is disposed on the second surface  300   b  of the first substrate  300 . The black matrix layer  310  is disposed corresponding to the non-opening area  302  to surround the plurality of opening areas  301 . Next, as shown in  FIG. 5A , a color filter layer  320  is disposed on the second surface  300   b  of the first substrate  300  corresponding to the opening areas  301 , and is partially located at an edge, adjacent to the opening areas  301 , of the black matrix layer  310 ; however, the present disclosure is not limited thereto. Specifically, the color filter layer  320  in this embodiment may include a red filter layer, a green filter layer, and a blue filter layer (not shown). The red filter layer, the green filter layer, and the blue filter layer are respectively disposed corresponding to the opening areas  301  of the first substrate  300  respectively by using an island type. Edges of the red filter layer, the green filter layer, and the blue filter layer are respectively partially overlapped with edges of the black matrix layer  310 . Subsequently, a protection layer  330  is disposed on the black matrix layer  310  and the color filter layer  320 . A material of the protection layer  330  may be an organic insulation material, an inorganic insulation material or a combination of the foregoing materials. Further, referring to both  FIG. 4B  and  FIG. 5A , the touch electrode layer  340  is disposed on the protection layer  330  corresponding to the non-opening area  302 . A material of the touch electrode layer  340  may be indium tin oxide (ITO), indium zinc oxide (IZO), metal or another suitable transparent conductive material. In this embodiment, the touch electrode layer  340  includes a plurality of first touch electrodes  340   a  and a plurality of second touch electrodes  340   b . The plurality of first touch electrodes  340   a  may be sensing touch electrodes, and the plurality of second touch electrodes  340   b  may be driving touch electrodes; alternatively, the plurality of first touch electrodes  340   a  may be driving touch electrodes, and the plurality of second touch electrodes  340   b  may be sensing touch electrodes. In addition, this embodiment may also further include disposing another touch conductive layer (not shown) on the touch electrode layer  340 ; however, the present disclosure is not limited thereto. A person skilled in the art may consider a value of a touch capacitance during design to decide whether to dispose another touch conductive layer. In certain embodiments, the touch electrode layer  340  may be formed of metal covered with ITO or IZO. With the composite structure, the capacitance may be adjusted. Next, as shown in  FIG. 5A , a first flat layer  351  is disposed on the touch electrode layer  340  and the protection layer  330 . In this embodiment, the color filter layer  320  using an island-type design may save a cost of the color filter layer, and for an uneven thickness of the color filter layer  320 , a problem of uneven film thickness may be mitigated by fabricating the touch electrode layer  340  and the first flat layer  351  subsequently. However, the present disclosure is not limited thereto, and a person skilled in the art may adjust, according to a design consideration, a manner of fabricating the color filter layer. Subsequently, referring to both  FIG. 4C  and  FIG. 5A , a metal layer  370  is disposed on the first flat layer  351  corresponding to the non-opening area  302 . A material of the metal layer  370  may be molybdenum (Mo), aluminum (Al) or another suitable metal conductive material and a combination thereof. The metal layer  370  has a plurality of metal bridging lines  373 , a plurality of first metal lines  371 , and a plurality of second metal lines  372 . The plurality of first metal lines  371  extends in a first direction X and the plurality of second metal lines  372  extends in a second direction Y, and the second metal lines  372  are electrically connected to the plurality of first metal lines  371 . The plurality of first metal lines  371  and the plurality of second metal lines  372  are electrically insulated from the plurality of metal bridging lines  373 . The first direction X and the second direction Y are directions intersecting with each other. In this embodiment, the metal bridging lines  373  are correspondingly disposed between any adjacent two of the second touch electrodes  340   b  in a direction of a vertical projection on the first substrate  300 , and any adjacent two of the second touch electrodes  340   b  are electrically connected through the metal bridging lines  373 . A patterned viewing angle control transparent electrode layer  360  is disposed on the metal layer  370  and the first flat layer  351 . A material of the patterned viewing angle control transparent electrode layer  360  may be indium tin oxide (ITO), indium zinc oxide (IZO) or another suitable transparent conductive material. Next, referring to both  FIG. 4D  and  FIG. 5A , the patterned viewing angle control transparent electrode layer  360  has a plurality of control electrode members  363 , a plurality of first connection electrode members  361 , and a plurality of second connection electrode members  362 . The plurality of control electrode members  363  is disposed corresponding to the opening areas  301 , and the plurality of first connection electrode members  361  is respectively disposed corresponding to the plurality of first metal lines  371  and is electrically connected to the plurality of control electrode members  363 . The second connection electrode members  362  are disposed corresponding to the second metal lines  372  and are electrically connected to the plurality of first connection electrode members  361 . The patterned viewing angle control transparent electrode layer  360  further includes a plurality of transparent bridging lines  364 . The transparent bridging lines  364  are electrically insulated from the control electrode members  363 , the first connection electrode members  361 , and the second connection electrode members  362 . The transparent bridging lines  364  are disposed corresponding to the metal bridging lines  373  in an overlapped manner, and are electrically connected to any adjacent two of the second touch electrodes  340   b  through the metal bridging lines  373 . Finally, referring to  FIG. 5A , a second flat layer  352  is disposed on the patterned viewing angle control transparent electrode layer  360  and the first flat layer  351 . A thickness of the second flat layer  252  is at least 3 micrometers to keep relatively desirable LC efficiency. In certain embodiments, the position of the metal layer  370  and the patterned viewing angle control transparent electrode layer  360  and the fabrication steps of forming the metal layer  370  and the patterned viewing angle control transparent electrode layer  360  may be exchanged. 
         [0028]    For the first substrate  300  in the foregoing embodiment of the present disclosure, in the present disclosure, the touch electrode layer  340  and the patterned viewing angle control transparent electrode layer  360  are both integrated on the first substrate  300 , and the metal layer  370  is disposed between the first flat layer  351  and the patterned viewing angle control transparent electrode layer  360 , so that impedance of the patterned viewing angle control transparent electrode layer  360  may be reduced; however, the present disclosure is not limited thereto. In this example, the metal bridging lines  373  and the transparent bridging lines  364  are used to transfer a signal between the second touch electrodes  340   b , and the control electrode members  363 , the first connection electrode members  361 , and the second connection electrode members  362  are used to transfer a signal of a common electrode layer  123  of a second substrate  120 . The patterned viewing angle control transparent electrode layer  360  of the present disclosure is disposed on the metal layer  370 , and also protects the metal layer  370  in a fabrication process from corrosion to avoid an interruption problem. 
         [0029]      FIG. 5B  is a schematic sectional view of the first substrate along a sectional line B 1 -B 2  according to another variant embodiment of the present disclosure.  FIG. 5B  is another variant embodiment of  FIG. 5A , and same element symbols and detailed description are not elaborated herein. Only corresponding differences are described below. As shown in  FIG. 5B , the color filter layer  320  is disposed on the patterned viewing angle control transparent electrode layer  360  and the first flat layer  351  corresponding to the opening areas  301  and the non-opening area  302 ; however, the present disclosure is not limited thereto. Specifically, the color filter layer  320  in this embodiment may include a red filter layer, a green filter layer, and a blue filter layer (not shown). The red filter layer, the green filter layer, and the blue filter layer are respectively disposed by using a strip type respectively in parallel in the first direction X or the second direction Y (referring to  FIG. 4D ). Edges of the red filter layer, the green filter layer, and the blue filter layer are partially overlapped with each other respectively in a direction of a vertical projection of the black matrix layer  310 . Next, the second flat layer  352  is disposed on the color filter layer  320 . In this embodiment, a total thickness of the color filter layer  320  and the second flat layer  352  is at least 3 micrometers to keep relatively desirable LC efficiency. In this embodiment, the color filter layer  320  uses a strip design, so that flatness of a film layer may be improved, to prevent that a subsequent thickness of the second flat layer  352  is insufficient to affect flatness of the second flat layer  352 . However, the present disclosure is not limited thereto, and a person skilled in the art may adjust, according to a design consideration, a manner of fabricating the color filter layer. In another variant embodiment of the present disclosure, the color filter layer  320  is disposed between the patterned viewing angle control transparent electrode layer  360  and the second flat layer  352 , so as to reduce the thickness of the second flat layer  352  to reduce vapor infiltration to avoid formation of LC bubbles. 
         [0030]    In conclusion, for the touch display apparatus proposed in the present disclosure, a patterned viewing angle control transparent electrode layer is used to implement efficacy of anti-peeping. A voltage difference between the patterned viewing angle control transparent electrode layer and a common electrode layer is adjusted to control LC rotation in an LC layer to reduce a viewing angle of the touch display apparatus, so that irrelevant people around a user are prevented from peeping at personal information on a screen. In addition to the efficacy of anti-peeping, the patterned viewing angle control transparent electrode layer may also be used as a bridge between touch electrodes on the touch electrode layer, so as to replace an original metal layer used as a bridge, thereby reducing complexity of processing. 
         [0031]    Although the present disclosure is disclosed as above by using the preferred embodiments, the preferred embodiments are not used to limit the present disclosure. Any person skilled in the art may make variations and modifications without departing from the spirit and scope of the present disclosure, and therefore the protection scope of the present disclosure should be as defined by the appended claims.