Abstract:
The present invention discloses an array substrate, a display panel, and a display device, for solving a problem of tip discharge a comb pixel electrode comprised in a sub-pixel unit in the prior art, which produces discharge to surrounding data lines, gate lines, and neighboring pixel electrodes, so that neighboring sub-pixel units are subject to interference and display effect is influenced. The array substrate comprises a base plate, the base plate is further provided with a plurality of sub-pixel units, each of the sub-pixel units comprises a pixel electrode of a comb structure, and the base plate is further provided with a shielding electrode which is electrically connected with the pixel electrode.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to the field of liquid crystal display technology, and particularly to an array substrate, a display panel, and a display device. 
       BACKGROUND OF THE INVENTION 
       [0002]    Due to features of a small thickness, low power consumption, being nonradiative, and so on, a thin film transistor liquid crystal display (TFT-LCD) recently has developed rapidly and taken the dominant place in the current flat panel display market. Nowadays, the TFT-LCD have been widely applied in various products of large, medium or small size, and almost covered most electronic products in the current information society. The TFT-LCD has been applied to a product of a relatively large size like liquid crystal TV and high definition TV. 
         [0003]    In the prior art, sub-pixel units of a pixel electrode should be designed to have a comb structure or at least have a comb structure at an edge, so that multi-domain display can be realized. However, the pixel electrode of the comb structure may bring about tip discharge to neighboring sub-pixel electrodes, gate lines, and data lines, resulting to significant interference to neighboring sub-pixel units, which influences display effect of the display panel. 
       SUMMARY OF THE INVENTION 
       [0004]    It is an object of the present invention to provide an array substrate, a display panel, and a display device, so that one or more problems as mentioned above can be avoided or at least alleviated. According to the present invention, the problem in the prior art in which tip discharge of a comb electrode comprised in a sub-pixel unit results in interference on surrounding data lines, gate lines, and neighboring sub-pixel units, can be solved. 
         [0005]    The object of the present invention is realized by the following technical solutions. 
         [0006]    An embodiment of the present invention provides an array substrate, comprising a base plate. The base plate is further provided with a plurality of sub-pixel units, each of the sub-pixel units comprises a pixel electrode of a comb structure, and the base plate is further provided with a shielding electrode which is electrically connected with the pixel electrode. In the present embodiment, since the pixel electrode is electrically connected with the shielding electrode, tip discharge of the pixel electrode having a comb structure can be effectively eliminated or suppressed, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated. 
         [0007]    Preferably, the pixel electrode has a comb structure at an edge or has a comb structure as a whole. In the present embodiment, since the pixel electrode is electrically connected with the shielding electrode, tip discharge of the pixel electrode can be effectively eliminated or suppressed, no matter the pixel electrode has a comb structure at an edge or has a comb structure as a whole. 
         [0008]    Preferably, the shielding electrode is electrically connected with a tip of the comb structure of the pixel electrode. In the present embodiment, since the tip of the comb structure of the pixel electrode is electrically connected with the shielding electrode, tip discharge of the comb structure of the pixel electrode can be better eliminated, and the fabricating process for the pixel electrode can be realized more easily. 
         [0009]    Preferably, every two rows of sub-pixel units form a sub-pixel unit group, two gate lines are arranged between two rows of sub-pixel units of each of the sub-pixel unit groups; and the shielding electrode is at least arranged at an upper edge of the pixel electrode in an upper row of sub-pixel units of the sub-pixel unit group, and the shielding electrode is at least arranged at a lower edge of the pixel electrode in a lower row of sub-pixel units of the sub-pixel unit group. In the present embodiment, as for a dual-gate driving sub-pixel unit array, since a distance between the pixel electrodes in neighboring sub-pixel unit groups is relatively small, the shielding electrode is at least arranged at upper and lower edge of the sub-pixel unit groups, so that interference between neighboring sub-pixel unit groups is shield. 
         [0010]    Preferably, the pixel electrode comprises a first pixel electrode and a second pixel electrode which are arranged from top to bottom in a column direction, and a gate line is arranged between the first pixel electrode and the second pixel electrode of sub-pixel units belonging to a same column, and the shielding electrode is arranged at an upper edge of the first pixel electrode, the shielding electrode is arranged at a lower edge of the second pixel electrode. In the present embodiment, as for a single-gate driving sub-pixel unit array, interference between two neighboring rows of sub-pixel units in the column direction is shield. 
         [0011]    Preferably, the pixel electrode comprises a first pixel electrode and a second pixel electrode which are arranged from top to bottom in a column direction, and a gate line is arranged between the first pixel electrode and the second pixel electrode of sub-pixel units belonging to a same column, and the shielding electrode is arranged at at least one edge of the first pixel electrode, and the shielding electrode is arranged at at least one edge of the second pixel electrode. In the present embodiment, interference between two neighboring rows of sub-pixel units in both the column direction and the row direction is shield. 
         [0012]    Preferably, the pixel electrode comprises a first pixel electrode and a second pixel electrode which are arranged from top to bottom in a column direction, and a gate line is arranged between the first pixel electrode and the second pixel electrode of sub-pixel units belonging to a same column, and the shielding electrode is arranged at all edges of the first pixel electrode and the second pixel electrode. In the present embodiment, interference between sub-pixel units and between the first pixel electrode and the second pixel electrode is shield. 
         [0013]    Preferably, the shielding electrode, the first pixel electrode and the second pixel electrode are arranged in the same layer. In the present embodiment, the process can be saved by arranging the shielding electrode, the first pixel electrode and the second pixel electrode in the same layer. 
         [0014]    Preferably, the shielding electrode is made from ITO or IZO. 
         [0015]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
         [0016]    An embodiment of the present invention provides a display panel comprising the array substrate provided in the above embodiments. 
         [0017]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
         [0018]    An embodiment of the present invention provides a display device comprising the array substrate provided in the above embodiments. 
         [0019]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0020]      FIG. 1  is a structural view for sub-pixel units of the present invention; 
           [0021]      FIG. 2  is a structural view for an array substrate in a preferred embodiment of the present invention; 
           [0022]      FIG. 3  is a structural view for another array substrate in a preferred embodiment of the present invention; 
           [0023]      FIG. 4  is a structural view for a first specific array substrate on basis of  FIG. 3 ; 
           [0024]      FIG. 5  is a structural view for a second specific array substrate on basis of  FIG. 3 ; and 
           [0025]      FIG. 6  is a structural view for a third specific array substrate on basis of  FIG. 3 . 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0026]    The present invention will be elucidated hereinafter in details with reference to the accompanying drawings and embodiments. It is noted that the same reference numerals are used throughout the figures to indicate the same or similar parts. These embodiments are exemplary in nature for illustrating the present invention, and do not intend to limit the present invention. 
         [0027]    In an embodiment of the present invention, there is provided an array substrate comprising a base plate on which an array of sub-pixel units is formed.  FIG. 1  is a structural view for a sub-pixel unit  1 . The sub-pixel unit  1  comprises a pixel electrode  2  and a shielding electrode  3 . The pixel electrode  2  has a comb structure at least at an edge, and is provided with the shielding electrode  3  at at least one edge. The shielding electrode  3  is electrically connected with a tip of the comb structure of the pixel electrode  2 . In figures, a rectangular frame surrounded by oblique lines indicates the pixel electrode  2 , where the rectangular frame indicates a body of the pixel electrode, and oblique lines indicates edge portions of the pixel electrode. It is noted that the pixel electrode  2  not only can only have the comb structure at the edge, but also can have the comb structure as a whole, and that the shielding electrode  3  can not only be arranged at one edge of the pixel electrode  2 , but also at two or more edges of the pixel electrode  2 . In an embodiment of the present invention, the shielding electrode  3  is arranged at at least one edge of the pixel electrode  2 , so that the interference of tip discharge of the pixel electrode  2  on the surrounding data lines, gate lines, and neighboring sub-pixel units  1  is eliminated. 
         [0028]    Reference is made to  FIG. 2 , which is a schematic view for an array substrate in a preferred embodiment. Every two rows of sub-pixel units  1  form a sub-pixel unit group  4 . Two gate lines  5  are arranged between two rows of sub-pixel units  1  of each sub-pixel unit group  4 . The shielding electrode  3  is at least arranged at an upper edge of the pixel electrode  2  in an upper row of sub-pixel units  1  of the sub-pixel unit group  4 , and the shielding electrode  3  is at least arranged at a lower edge of the pixel electrode  2  in a lower row of sub-pixel units  1  of the sub-pixel unit group  4 . In the present embodiment, as for a dual-gate driving sub-pixel unit array, since a distance between the pixel electrodes  2  in neighboring sub-pixel unit groups  4  is relatively small, the shielding electrode  3  is at least arranged at upper and lower edge of the sub-pixel unit groups  4 , so that interference between neighboring sub-pixel unit groups  4  is shield. 
         [0029]    Reference is made to  FIG. 3 , which is a schematic view for another array substrate in a preferred embodiment. The pixel electrode  2  comprises a first pixel electrode  21  and a second pixel electrode  22  which are arranged from top to bottom in a column direction and have a comb structure. A gate line  5  is arranged between the first pixel electrode  21  and the second pixel electrode  22  of sub-pixel units  1  belonging to the same column. The shielding electrode  3  is at least arranged at the upper edge of the first pixel electrode  21 , and the shielding electrode  3  is at least arranged at the lower edge of the second pixel electrode  22 . In the present embodiment, the shielding electrode  3  is at least arranged at the upper and lower edge of the pixel electrode  2  (e.g., the upper edge of the first pixel electrode  21  and the lower edge of the second pixel electrode  22 ), so that interference between two neighboring rows of sub-pixel units is shield. For example, the shielding electrode is arranged at an upper edge of the first pixel electrode  21 , and the shielding electrode is arranged at a lower edge of the second pixel electrode  22 . In the present embodiment, interference between two neighboring rows of sub-pixel units in the column direction is shield. Besides, for example, the shielding electrode is arranged at the upper edge and at least one lateral edge of the first pixel electrode  21 , and the shielding electrode is arranged at the lower edge and at least one lateral edge of the second pixel electrode  22 . In the present embodiment, interference between two neighboring rows of sub-pixel units in both the column direction and the row direction is shield. Again, for example, the shielding electrode is arranged at all edges of the first pixel electrode  21  and the second pixel electrode  22 . In the present embodiment, interference between sub-pixel units and between the first pixel electrode  21  and the second pixel electrode  22  is shield. 
         [0030]    Reference is made to  FIG. 4 . A first specific array substrate is provided on basis of  FIG. 3 , which comprises a base plate  10 . An array of sub-pixel units is formed on the base plate  10 . Each sub-pixel unit  1  comprises a , and the first pixel electrode  21  and the second pixel electrode  22  which are arranged in the column direction and have a comb structure. A gate line  5  is arranged between the first pixel electrode  21  and the second pixel electrode  22  of sub-pixel units belonging to the same column, and a data line  7  is arranged between two neighboring columns of sub-pixel units  1 . The shielding electrode  3  is arranged at the upper edge of the first pixel electrode  21 , and the shielding electrode  3  is arranged at the lower edge of the second pixel electrode  22 . Of course, the shielding electrode  3  can also be arranged at multiple edges of the first pixel electrode  21  and the second pixel electrode  22 . For example, as shown in  FIG. 5 , a second specific array substrate is provided on basis of  FIG. 3 . This array substrate differs from that of  FIG. 4  in that, the shielding electrode  3  is arranged at the upper edge and one lateral edge of the first pixel electrode  21 , and the shielding electrode  3  is arranged at the lower edge and one lateral edge of the second pixel electrode  22 . Besides, for example as shown in  FIG. 6 , a third specific array substrate is provided on basis of  FIG. 3 . This array substrate differs from that of  FIG. 4  in that, the shielding electrode  3  is arranged at the upper edge and two lateral edges the first pixel electrode  21 , and the shielding electrode  3  is arranged at the lower edge and two lateral edges of the second pixel electrode  22 . In the array substrate of  FIG. 5  and  FIG. 6 , the shielding electrode  3  is arranged at at least two edges of the first pixel electrode  21  and the second pixel electrode  22 , so that interference on the surrounding data lines  7 , gate lines  5 , and neighboring sub-pixel units  1  due to tip discharge from the comb-shaped first pixel electrode  21  and second pixel electrode  22  of the sub-pixel units  1  can be better eliminated. 
         [0031]    Preferably, the shielding electrode  3  and the pixel electrode  2  are arranged in the same layer. In the present embodiment, the process can be saved by arranging the shielding electrode  3  and the pixel electrode  2  in the same layer. 
         [0032]    Preferably, the shielding electrode  3  is made from ITO or IZO. 
         [0033]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
         [0034]    An embodiment of the present invention provides a display panel comprising the array substrate provided in the above embodiments. 
         [0035]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
         [0036]    An embodiment of the present invention provides a display device comprising the array substrate provided in the above embodiments. 
         [0037]    Embodiments of the present invention have the following beneficial effects. The shielding electrode is arranged at at least one edge of the pixel electrode, so that interference on surrounding data lines, gate lines, and neighboring sub-pixel units due to tip discharge of the pixel electrode is eliminated, and display effect of the display panel is improved. 
         [0038]    Although the present invention has been described above with reference to specific embodiments, it should be understood that the limitations of the described embodiments are merely for illustrative purpose and by no means limiting. Instead, the scope of the invention is defined by the appended claims rather than by the description, and all variations that fall within the range of the claims are intended to be embraced therein. Thus, other embodiments than the specific ones described above are equally possible within the scope of these appended claims.