Abstract:
The present invention proposes a touch panel and a mobile terminal. The touch panel includes a first conducting wire extending along a first direction and a second conducting wire extending along a second direction and crossing the first conducting wire. The first conducting wire includes first sensing electrodes arranged along the first direction and first connecting bridges linking two adjacent first sensing electrodes. The second conducting wire includes second sensing electrodes arranged along the second direction and second connecting bridges linking two adjacent second sensing electrodes. Each first sensing electrode comprises one or more pinnacles extending toward a third direction, and each pinnacle overlaps and is spaced apart from the second sensing electrode. Therefore, the accumulated electric charges discarge electricity through the pinnacle, and the second sensing electrode produces a current. real-time discharge of electrostatic is conducted.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a touch panel and a mobile terminal. 
         [0003]    2. Description of the Prior Art 
         [0004]    A touch panel has advantages over a rapid response speed, precise positioning, multi-touch points, and a long life time, and are widely used in a mobile terminal. The touch panel with larger size and more resolution is more convenient for a user. However, a possibility of electrostatic damage in the touch panel increases in the processes of forming the touch panel. Furthermore, accumulated charges caused by rubbing the touch panel may serve as a contact on the touch panel, thereby triggering in fault. Therefore, an electrostatic discharge (ESD) protection circuit is disposed in the touch panel to leak out the accumulated charges rapidly. 
         [0005]    Nevertheless, it is difficult to dispose more ESD protection circuits on the touch panel due to crowed electrodes on the touch panel. Recently, utilizing metallic edges surrounding the touch panel and connected to ground is adopted. Please refer to  FIG. 1  showing a schematic diagram of a conventional touch panel using the metallic edges connected to ground. Only electrostatic charge near the metallic edges is leaked out, but the accumulated charge in an area away from the metallic edges remains. As a result, such touch panel using the metallic edges still fails to overcome electrostatic interference. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention proposes a touch panel and a mobile terminal for solving the issue with ESD on the touch panel in the conventional technology. 
         [0007]    According to the present invention, a touch panel comprises a first conducting wire extending along a first direction, comprising a plurality of first sensing electrodes arranged along the first direction and a plurality of first connecting bridges linking two adjacent first sensing electrodes; and a second conducting wire extending along a second direction and crossing the first conducting wire, comprising a plurality of second sensing electrodes arranged along the second direction and a plurality of second connecting bridges linking two adjacent second sensing electrodes. Each first sensing electrode comprises one or more pinnacles extending toward a third direction, and each pinnacle overlaps and is spaced apart from the second sensing electrode. In a top view, the plurality of first sensing electrode and the plurality of second sensing electrode are arranged in a zigzag order, the first connecting bridge overlaps the second connecting bridge. The first direction is perpendicular to the second direction. 
         [0008]    Furthermore, each first sensing electrode and each second sensing electrode are shaped as diamonds, and edges of the first sensing electrode are parallel to corresponding edges of the second sensing electrode. 
         [0009]    According to the present invention, a touch panel comprises a first conducting wire extending along a first direction, comprising a plurality of first sensing electrodes arranged along the first direction and a plurality of first connecting bridges linking two adjacent first sensing electrodes; and a second conducting wire extending along a second direction and crossing the first conducting wire, comprising a plurality of second sensing electrodes arranged along the second direction and a plurality of second connecting bridges linking two adjacent second sensing electrodes. Each first sensing electrode comprises one or more pinnacles extending toward a third direction, and each pinnacle overlaps and is spaced apart from the second sensing electrode. 
         [0010]    Furthermore, in a top view, the plurality of first sensing electrode and the plurality of second sensing electrode are arranged in a zigzag order, the first connecting bridge overlaps the second connecting bridge. 
         [0011]    Furthermore, each first sensing electrode and each second sensing electrode are shaped as diamonds, and edges of the first sensing electrode are parallel to corresponding edges of the second sensing electrode. 
         [0012]    Furthermore, a length of the pinnacle is longer than an interval between the first sensing electrode and the second sensing electrode. 
         [0013]    Furthermore, the touch panel further comprises an insulting layer sandwiched between the plurality of first connecting bridges and the plurality of second connecting bridges. 
         [0014]    Furthermore, each first sensing electrode comprises four pinnacles disposed on four edges of the first sensing electrode, respectively. 
         [0015]    Furthermore, the first connecting bridge links two vertices of the two adjacent first sensing electrodes, and a distance from the pinnacle to the first connecting bridge linking the first sensing electrode which comprises the pinnacle is less than a distance between the pinnacle and other corners of the first sensing electrode. 
         [0016]    Furthermore, the edges of the first sensing electrode and the second sensing electrode are set to 3 mm˜7 mm, and a distance between the pinnacle and the first connecting bridge is 1 mm˜3 mm. 
         [0017]    Furthermore, the first direction is perpendicular to the second direction. 
         [0018]    According to the present invention, a mobile terminal comprises a touch panel. The touch panel comprises a first conducting wire extending along a first direction, comprising a plurality of first sensing electrodes arranged along the first direction and a plurality of first connecting bridges linking two adjacent first sensing electrodes; and a second conducting wire extending along a second direction and crossing the first conducting wire, comprising a plurality of second sensing electrodes arranged along the second direction and a plurality of second connecting bridges linking two adjacent second sensing electrodes. Each first sensing electrode comprises one or more pinnacles extending toward a third direction, and each pinnacle overlaps and is spaced apart from the second sensing electrode. 
         [0019]    Furthermore, in a top view, the plurality of first sensing electrode and the plurality of second sensing electrode are arranged in a zigzag order, the first connecting bridge overlaps the second connecting bridge. 
         [0020]    Furthermore, each first sensing electrode and each second sensing electrode are shaped as diamonds, and edges of the first sensing electrode are parallel to corresponding edges of the second sensing electrode. 
         [0021]    Furthermore, a length of the pinnacle is longer than an interval between the first sensing electrode and the second sensing electrode. 
         [0022]    Furthermore, the touch panel further comprises an insulting layer sandwished between the plurality of first connecting bridges and the plurality of second connecting bridges. 
         [0023]    Furthermore, each first sensing electrode comprises four pinnacles disposed on four edges of the first sensing electrode, respectively. 
         [0024]    Furthermore, the first connecting bridge links two vertices of the two adjacent first sensing electrodes, and a distance from the pinnacle to the first connecting bridge linking the first sensing electrode which comprises the pinnacle is less than a distance between the pinnacle and other corners of the first sensing electrode. 
         [0025]    Furthermore, the edges of the first sensing electrode and the second sensing electrode are set to 3 mm˜7 mm, and a distance between the pinnacle and the first connecting bridge is 1 mm˜3 mm. 
         [0026]    Furthermore, the first direction is perpendicular to the second direction. 
         [0027]    In contrast to prior art, the touch panel of the present invention comprises a first conductive wire extending along a first direction and a second first conductive wire extending along a second direction. The first and second conductive wires are overlapped. The first conductive wire comprises a plurality of first sensing electrodes arranged at intervals and a first connecting bridge connecting any two adjacent first sensing electrodes. The second conductive wire comprises a plurality of second sensing electrodes arranged at intervals and a second connecting bridge connecting any two adjacent second sensing electrodes. At least one pinnacle is disposed on the first sensing electrode and points to a third direction. Superfluous electric charges on the touch panel are accumulated on the pinnacle. The pinnacle and the second sensing electrode are overlapped and insulated. Therefore, the accumulated electric charges discarge electricity through the pinnacle, and the second sensing electrode produces a current. Real-time discharge of electrostatic is conducted. This is the benefit provided by the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]      FIG. 1  shows a schematic diagram of a conventional touch panel using the metallic edges connected to ground 
           [0029]      FIG. 2  is a schematic diagram of a touch panel according to a first embodiment of the present invention. 
           [0030]      FIG. 3  is a schematic diagram of a touch unit in the touch panel as shown in  FIG. 2  according to the first embodiment of the present invention. 
           [0031]      FIG. 4  is a cross-sectional view of the touch unit as shown in  FIG. 3  along an A-A direction. 
           [0032]      FIG. 5  is a schematic diagram of a mobile terminal  200  according to the first embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0033]    Please refer to  FIG. 2 .  FIG. 2  is a schematic diagram of a touch panel  100  according to a first embodiment of the present invention. The touch panel  100  comprises a plurality of first conductive wires  11  extending along a first direction X and a plurality of second conductive wires  12  extending along a second direction Y. One of the conductive wires is used for inputting a driving signal, and the other is used for receiving a checking signal. So it is possible that a driving electrode Tx is disposed in the first conductive wire  11 , and a checking electrode Rx is disposed in the second conductive wire  12 . Or, it is possible that a checking electrode Rx is disposed in the first conductive wire  11 , and a driving electrode Tx is disposed in the second conductive wire  12 . When touch detection conducts, variation of the mutual capacitance on the cross point of the conductive wires is detected, or variation of the self capacitance in each of the conductive wires is detected. The touch point is detected in the way of self-capacitance or mutual capacitance. Provided that the first direction X and the second direction Y form a coordinate system, the position of the touch point can be identified on the coordinate system. An ordinary and standard method is that the first direction X is perpendicular to the second direction Y for detecting capacitance more easily and positioning coordinates more conveniently. If the touch panel  100  is shaped to be other shapes such as a round, an irregular shape, or a curve, the first direction X and the second direction Y may be crossed instead of perpendicular. 
         [0034]    Please refer to  FIG. 3 .  FIG. 3  is a schematic diagram of a touch unit in the touch panel  100  as shown in  FIG. 2  according to the first embodiment of the present invention. The touch unit is the repetition structure of the touch panel  100 . The first conductive wire  11  comprises a plurality of first sensing electrodes  111  arranged at intervals in the first direction X and a first connecting bridge  112  connecting any two adjacent first sensing electrodes  111 . Further, a pinnacle  113  is disposed on the first sensing electrode  111  for discharging electrostatic. The pinnacle  113  points to a third direction Z. The second conductive wire  12  comprises a plurality of second sensing electrodes  121  arranged at intervals in the second direction Y and a second connecting bridge  122  connecting any two adjacent second sensing electrodes  121 . 
         [0035]    The touch panel  100  is a square touch panel. The first sensing electrode  111  and the second sensing electrode  121  form a triangle at the sides of the touch panel  100 ; otherwise, the first sensing electrode  111  and the second sensing electrode  121  form a diamond. The first connecting bridge  112  is connected to the vertices of any two adjacent first sensing electrodes  111 . The second connecting bridge  122  is connected to the vertices of any two adjacent second sensing electrodes  121 . The pinnacle  113  may be a triangular or stripped pinnacle or a peaked pinnacle which is thin on top and thick on bottom. In this embodiment, four pinnacles  113  are disposed on each of the plurality of first sensing electrodes  111 . The four pinnacles  113  are disposed on the four sides of the first sensing electrode  111 , respectively. Or, two of the four pinnacles  113  are disposed on two of the four sides of the first sensing electrodes  111  corresponding to two sides of the second sensing electrode  121 , and the other pinnacles  113  are disposed on the other sides of the second sensing electrode  121 . Of course, only one pinnacle  113  or a plurality of pinnacles  113  may be disposed on each of the plurality of first sensing electrodes  111 . Or only one pinnacle  113  or a plurality of pinnacles  113  may be disposed on the second sensing electrode  121  in other embodiments. 
         [0036]    The first sensing electrode  111 , the first connecting bridge  112 , the second sensing electrode  121 , and the second connecting bridge  122  are fabricated from the same material such as transparent conductive material or indium tin oxide (ITO)/conductive glass. The pinnacle  113  and the first sensing electrode  111  may be fabricated from the same material, and the pinnacle  113  and the first sensing electrode  111  are formed in the same masking process. The pinnacle  113  and the first sensing electrode  111  may be fabricated from different materials, and the pinnacle  113  is conducted and welded on the first sensing electrode  111 . The manufacturing process of the touch panel  100  is not limited in the present invention; instead, the manufacturing process of the touch panel  100  varies based on practical conditions. An example is that the first sensing electrode  111 , the second sensing electrode  121 , and the second connecting bridge  122  are also formed in the same masking process at first, and then the first connecting bridge  112  and the pinnacle  113  are produced and conducted to the first sensing electrode  111  when the pinnacle  113  and the first sensing electrode  111  are fabricated from the same material. The first sensing electrode  111 , the second sensing electrode  121 , and the second connecting bridge  122  are formed in the same masking process, and a wider area is produced. Since the material can be fully utilized, the cost is reduced. 
         [0037]    Seen from the plane, the first sensing electrode  111  and the second sensing electrode  121  are arranged in a zigzag order. The sides of the first sensing electrode  111  and the sides of the second sensing electrode  121  are in parallel. The third direction Z, which the pinnacle  113  points to, is not a specific direction. The third direction Z is particularly different from the first direction X and from the second direction Y. Any direction forming a specific direction with the first direction X and the second direction Y can be regarded as the third direction Z. The third direction Z shown in  FIG. 3  merely represents two of the four directions which the four pinnacles  113  point to. The other two directions are disposed opposite. The third direction Z is perpendicular to the sides of the first sensing electrode  111  in this embodiment. Of course, it is possible that the third direction Z is not perpendicular to the sides of the first sensing electrode  111  in other embodiments. The length of the pinnacle  113  is larger than the distance between the first sensing electrode  111  and the second sensing electrode  121 . In other words, the pinnacles  113  are overlapped above the second sensing electrode  121 . 
         [0038]    Please refer to  FIG. 4 .  FIG. 4  is a cross section of the touch unit as shown in  FIG. 3  along an A-A direction. The first connecting bridge  112  and the second connecting bridge  122  are overlapped. An insulation layer  13  is inserted between the first connecting bridge  112  and the second connecting bridge  122 . The pinnacle  113  and the second sensing electrode  121  are overlapped and insulated. 
         [0039]    The process of ESD of the pinnacle  113  is explained. Generally, the touch panel  100  is placed on the surface of the device. The touch panel  100  and other objects easily rub together, producing electricity and transferring electric charges. Once too much electric charges are accumulated on the sensing electrode of the touch panel  100 , the accumulated electric charges will produce electrostatic. Because of electrostatic, the touch panel  100  senses touched easily and mistakenly. Then the touch panel  100  gives the baseband chip wrong information, causing a wrong trigger. On the process of sending and receiving signals between two sensing electrodes, differences, i.e., differences of electric levels, often occur due to energy consumption, outer interference, etc. The differences reflect on the amount of electric charges, that is, inconformity of positive and negative electric charges. The inconformity of positive and negative electric charges results in superfluous electric charges. Therefore, ESD is conducted in this embodiment. Specifically, real-time discharge of electric charges from the pinnacle  113  is conducted. 
         [0040]    Electric charges are often accumulated on acute portions of a conductor. It means that superfluous positive or negative electric charges tend to accumulated on the pinnacle  113 . When the electric charges are accumulated to a certain degree, the magnetic field around the pinnacle  113  amplifies. Accordingly, the air surrounding the pinnacle  113  is ionized, the pinnacle  113  discharges, and the pinnacle  113  and other conductors produce a discharging current. Finally, electric charges release. The pinnacle  113  and the second sensing electrode  121  are overlapped so a longitudinal current is produced between the accumulation of the pinnacle  113  and the second sensing electrode  121 . Because the area of the first sensing electrode  111  and the second sensing electrode  121  is larger than the pinnacle  113 , the strong current produced by instantly discharging pinnacle  113  will not easily damage the first sensing electrode  111  or the second sensing electrode  121 . 
         [0041]    Because the first connecting bridge  112  between any two adjacent first sensing electrodes  111  is relatively thinner, superfluous electric charges are often accumulated on the first connecting bridge  112 . The first connecting bridge  112  does not comprise an acute portion so it is difficult for the accumulated electric charges to release. So the electric charges on the first connecting bridge  112  have to be transferred to the pinnacle  113 . The pinnacle  113  in this embodiment is disposed near the first connecting bridge  112 . The distance between the pinnacle  113  and the first connecting bridge  112  is smaller than the distance between the pinnacle  113  and any other vertices of the first sensing electrodes  111 . The formula s&lt;d−s is proposed. In this formula, s represents the distance between the pinnacle  113  and the first connecting bridge  112 , and d represents the length of the first sensing electrode  111 . The first sensing electrode  111  in this embodiment is a special diamond, i.e., a square. 
         [0042]    The length d of the sides of the first sensing electrode  111  and second sensing electrode  121  is 3 to 7 mm. The distance s between the pinnacle  113  and the first connecting bridge  112  is 1 to 3 mm while the length d is set to be 5 mm, and the distance s is set to be 1 mm in this embodiment. If the resolution of the touch panel needs to be higher, the length d may be set to be 3 mm and meanwhile, the distance s is set to be 1 mm. If the size of the touch panel is larger, the length d may be 7 mm and meanwhile, the distance s is set to be 3 mm. Of course, the length d may be 2 mm and the distance s may be 0.5 mm, or the length d may be 8 mm and the distance s may be 3.5 mm in other embodiments. The length d and the distance s can be planned based on practical conditions. In other words, the length d and the distance s are not limited here. 
         [0043]    In contrast to prior art, the touch panel of the present invention comprises a first conductive wire extending along a first direction and a second first conductive wire extending along a second direction. The first and second conductive wires are overlapped. The first conductive wire comprises a plurality of first sensing electrodes arranged at intervals and a first connecting bridge connecting any two adjacent first sensing electrodes. The second conductive wire comprises a plurality of second sensing electrodes arranged at intervals and a second connecting bridge connecting any two adjacent second sensing electrodes. At least one pinnacle is disposed on the first sensing electrode and points to a third direction. Superfluous electric charges on the touch panel are accumulated on the pinnacle. The pinnacle and the second sensing electrode are overlapped and insulated. Therefore, the accumulated electric charges discarge electricity through the pinnacle, and the second sensing electrode produces a current. Real-time discharge of electrostatic is conducted. This is the benefit provided by the present invention. 
         [0044]    Please refer to  FIG. 5 .  FIG. 5  is a schematic diagram of a mobile terminal  200  according to the first embodiment of the present invention. The mobile terminal  200  comprises a touch panel  21 , a display panel  22 , and a motherboard  23 . 
         [0045]    The touch panel  21  has the same structure and functions of the touch panel  100  shown in  FIG. 2 . The display panel  22  is a thin film transistor liquid crystal display (TFT-LCD). The motherboard  23  is used for control and calculation. The touch panel  21 , the display panel  22 , and the motherboard  23  are connected with one another with a flexible printed circuit (FPC)  24 . 
         [0046]    Compared with the conventional technology, real-time electrostatic discharge from the touch panel in the mobile terminal of this embodiment successfully realizes. So it is very hard for the users of the touch panel in the mobile terminal of the embodiment to operation the device incorrectly. In other words, the users of this touch panel will feel it convenient to use, which will increase user experience as well. 
         [0047]    The present disclosure is described in detail in accordance with the above contents with the specific preferred examples. However, this present disclosure is not limited to the specific examples. For the ordinary technical personnel of the technical field of the present disclosure, on the premise of keeping the conception of the present disclosure, the technical personnel can also make simple deductions or replacements, and all of which should be considered to belong to the protection scope of the present disclosure.