Abstract:
An LCD includes: a first substrate; first, second, and third gate lines extending along a first direction, formed over the first substrate and being parallel with each other; data lines insulated from the first gate line, the second gate line, and the third gate line and extending along a second direction that intersects the first direction; first, second, and third thin film transistors connected with the first gate lines, the second gate line, the third gate line, respectively and connected with the data lines; a passivation layer covering the first thin film transistor, the second thin film transistor, and the third thin film transistor; and first, second, and third pixel electrodes formed over the passivation layer and connected with the first thin film transistor, the second thin film transistor, and the third thin film transistor, respectively.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority to and the benefit of Korean Patent Application No. 10-2010-0126984 filed in the Korean Intellectual Property Office on Dec. 13, 2010, the entire contents of which are incorporated herein by reference. 
       BACKGROUND 
       [0002]    1. Field 
         [0003]    The described technology relates generally to a liquid crystal display (LCD). 
         [0004]    2. Description of the Related Art 
         [0005]    A liquid crystal display (LCD) is one of the most commonly used flat panel displays, and it includes two substrates with electrodes formed thereon and a liquid crystal layer interposed between the two substrates. In the LCD, a voltage is applied to the electrodes to realign liquid crystal molecules of the liquid crystal layer to thereby regulate the transmittance of light passing through the liquid crystal layer. 
         [0006]    The liquid crystal display also includes a switching element connected to each pixel electrode and a plurality of signal lines including gate lines and data lines for applying the voltage to the pixel electrode by controlling the switching element. The gate line transmits a gate signal generated from a gate driving circuit, the data line transmits a data voltage generated from a data driving circuit, and a switch transmits the data voltage to the pixel electrode according to the gate signal. an LCD has a triple gate structure in which the gate driver is formed through the same process of the switch and then integrated to the substrate. The pixels are arranged in a direction such that the number of gate lines is tripled but the number of data lines is maintained to be ⅓ of the number of the gate lines. Thus, the same resolution is realized with reduced costs. 
         [0007]    Meanwhile, an organic layer structure in which a thick organic layer covers the data line is applied to improve the aperture ratio, but the aperture ratio is not significantly improved even though the organic layer structure is applied to the LCD having the triple gate structure. Since the gate line is formed on the same layer of the storage electrode line, the gate line should have a gap with the storage electrode line, and an additional storage electrode is required to assure storage capacity in the organic layer structure so that the aperture ratio is decreased. Further, since the gate line and the source electrode have a large overlapped area, the gap between a gate line and the pixel electrode should be increased to reduce a kickback voltage due to parasitic capacitance between the gate electrode and the source electrode such that the aperture ratio is decreased. 
         [0008]    The above information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. 
       SUMMARY 
       [0009]    The described technology has been made in an effort to provide a liquid crystal display (LCD) with improved aperture ratio. 
         [0010]    An LCD according to an embodiment includes: a first substrate; first, second, and third gate lines extending along a first direction, formed over the first substrate and being parallel with each other; data lines insulated from the first gate line, the second gate line, and the third gate line and extending along a second direction that intersects the first direction; first, second, and third thin film transistors connected with the first gate lines, the second gate line, the third gate line, respectively, and connected with the data lines; a passivation layer covering the first thin film transistor, the second thin film transistor, and the third thin film transistor; and first, second, and third pixel electrodes formed over the passivation layer and connected with the first thin film transistor, the second thin film transistor, and the third thin film transistor, respectively. The first gate line extends through a middle portion of the second pixel electrode along the first direction when viewed from a viewing direction perpendicular to the first substrate. 
         [0011]    The LCD may further include at least one storage electrode line formed on the same layer where the first, second, and third gate lines are formed. 
         [0012]    The first gate line, the second gate line, and the third gate line may be sequentially arranged along the second direction, and the first gate line, the second gate line, and the third gate line may form one gate line group. 
         [0013]    The at least one storage electrode line may include: a first storage electrode line disposed between a third gate line of a previous gate line group and a first gate line of the present gate line group; a second storage electrode line disposed between the first gate line and a second line of the present gate line group; and a third storage electrode line disposed between the second gate line and a third gate line of the present gate line group. 
         [0014]    The first thin film transistor may be disposed between the first storage electrode line and the first gate line, the second thin film transistor may be disposed between the second storage electrode line and the second gate line, and the third thin film transistor may be disposed between the third storage electrode line and the third gate line. 
         [0015]    The first storage electrode line, the second storage electrode line, and the third storage electrode line may be sequentially arranged in the second direction, and the first storage electrode line, the second storage electrode line, and the third storage electrode line may form one storage electrode line group. 
         [0016]    The first pixel electrode may be disposed between a third storage electrode line of a previous storage electrode line group and a first storage electrode line of the present storage electrode line group, the second pixel electrode may be disposed between the first storage electrode line and the second storage electrode line of the present storage electrode line group, and the third pixel electrode may be disposed between the second storage electrode line and the third storage electrode line of the present storage electrode line group. 
         [0017]    Each of the first pixel electrode, the second pixel electrode, and the third pixel electrode may include a plurality of sub-pixel electrodes. 
         [0018]    The at least one storage electrode line may include at least an extended storage portion disposed between two neighboring two sub-pixel electrodes. 
         [0019]    The LCD may further include at least one overlapping electrode formed in the same layer of the data line and overlapping the at least one storage electrode line. 
         [0020]    The at least one overlapping electrode may include at least one extended overlapping portion disposed between two neighboring sub-pixel electrodes. 
         [0021]    The first thin film transistor may include a first gate electrode connected with the first gate line, a first source electrode connected with the data line, and a first drain electrode connected with the first pixel electrode, the second thin film transistor may include a second gate electrode connected with the second gate line, a second source electrode connected with the data line, and a second drain electrode connected with the second pixel electrode, and the third thin film transistor may include a third gate electrode connected with the third gate line, a third source electrode connected with the data line, and a third drain electrode connected with the third pixel electrode. 
         [0022]    The at least one overlapping electrode may include: a first overlapping electrode connected with the first drain electrode; a second overlapping electrode connected with the second drain electrode; and a third overlapping electrode connected with the third drain electrode, and the first overlapping electrode, the second overlapping electrode, and the third overlapping electrode may be separated from each other. 
         [0023]    The LCD may further include a gate insulating layer covering the gate line and the storage electrode line, and the passivation layer may include an organic layer. 
         [0024]    The LCD may further include a color filter display panel including a second substrate arranged opposite to the first substrate and a common electrode formed on the second substrate and a liquid crystal layer inserted between the thin film transistor display panel and the color filter display panel. 
         [0025]    The first direction may be perpendicular to the second direction. 
         [0026]    According to the embodiments, in an LCD with a triple gate structure employing an organic layer structure, each of storage electrode lines are disposed between two neighboring pixel electrodes and between two neighboring gate lines which extend through middle portions of the two neighboring pixel electrodes, respectively. Thus, the aperture ratio can be improved. 
         [0027]    Further, storage capacitors are disposed between a left-side sub-pixel electrode and a center sub-pixel electrode and between the center sub-pixel electrode and a right-side sub-pixel electrode such that the storage capacity can be improved while simultaneously improving the aperture ratio. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]      FIG. 1  is a layout view of three pixels adjacent to each other in a liquid crystal display (LCD) according to an embodiment. 
           [0029]      FIG. 2  is a cross-sectional view of the LCD of  FIG. 1 , taken along the line II-II. 
       
    
    
     DETAILED DESCRIPTION 
       [0030]    Embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. 
         [0031]    The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification. 
         [0032]    In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for understanding and ease of description, but the present invention is not limited thereto. 
         [0033]    In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. In the drawings, for understanding and ease of description, the thicknesses of some layers and areas are exaggerated. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present. 
         [0034]    Referring to  FIGS. 1 and 2 , a liquid crystal display (LCD) according to an embodiment will be described in further detail. 
         [0035]      FIG. 1  is a layout view of three pixels adjacent to each other in the LCD according to the embodiment, and  FIG. 2  is a cross-sectional view of the 
         [0036]    LCD of  FIG. 1 , taken along the line II-II. 
         [0037]    As shown in  FIG. 1  and  FIG. 2 , the LCD according to the embodiment includes a thin film transistor display panel  100 , a color filter display panel  200  facing the thin film transistor display panel  100 , and a liquid crystal layer  300  injected between the thin film transistor display panel  100  and the color filter display panel  200 . 
         [0038]    The thin film transistor display panel  100  includes a first substrate  110  formed with transparent glass or plastic, gate lines  121 , and storage electrode lines  131 . The gate lines  121  and the storage electrode lines  131  are formed on the first substrate  110 . 
         [0039]    The gate line  121  transmits a gate signal and substantially extends in a first direction, that is, a width direction of the drawing sheet. The gate lines  121  include a first gate line  121   aq,  a second gate line  121   bq,  and a third gate line  121   cq  that are parallel with each other. The first, second, and third gate lines  121   aq,    121   bq,  and  121   cq  for receiving different gate signals are arranged in a second direction that sequentially crosses the first direction, that is, a length direction of the drawing sheet, and the three gate lines  121   aq,    121   bq,  and  121   cq  form a gate line group. With reference to the present gate line group, a gate line group arranged above the present gate line group is defined as a previous gate line group and a gate line group arranged below the present gate line group is defined as a next gate line group. 
         [0040]    The first gate line  121   aq,  the second gate line  121   bq,  and the third gate line  121   cq  respectively include a first gate electrode  124   a,  a second gate electrode  124   b,  and a third gate electrode  124   c,  respectively protruding upward. 
         [0041]    The storage electrode line  131  receives a predetermined voltage, and extends in parallel with the gate line  121 . The storage electrode lines  131  include a first storage electrode line  131   aq  arranged between the third gate line  121   cp  of the previous gate line group and the first gate line  121   aq  of the present gate line group, a second storage electrode line  131   bq  arranged between the first gate line  121   aq  and the second gate line  121   bq  of the present gate line group, and a third storage electrode line  131   cq  arranged between the second gate line  121   bq  and the third gate line  121   cq  of the present gate line group. 
         [0042]    The first storage electrode line  131   aq,  the second storage electrode line  131   bq,  and the third storage electrode line  131   cq  are sequentially arranged in the second direction, and they form one storage electrode line group. With reference to the present storage electrode line group, a storage electrode line group arranged above the present storage electrode line group is defined as a previous storage electrode line group and a storage electrode line group arranged below the present storage electrode line group is defined as a next storage electrode line group. 
         [0043]    The storage electrode line  131  includes extended storage portions  133 ,  134 , and  135  for extending storage capacity, and the extended storage portions  133 ,  134 , and  135  include an upper extended storage portion  133  extending upward in the storage electrode line  131 , a lower extended storage portion  134  extended downward, and an overlapped extended storage portion  135  overlapping with a wide end portion of the drain electrode  175 . In the present embodiment, two upper extended storage portions  133  and two extended storage portions  134 , and one overlapped extended storage portion  135  are formed. 
         [0044]    The extended storage portions  133 ,  134 , and  135  respectively include a first upper extended storage portion  133   a  extended from the first storage electrode line  131   aq,  a first lower extended storage portion  134   a,  a first overlapped extended storage portion  135   a,  a second upper extended storage portion  133   b  extended from the second storage electrode line  131   bq,  a second lower extended storage portion  134   b,  a second overlapped extended storage portion  135   b,  a third upper extended storage portion  133   c  extended from the third storage electrode line  131   cq,  a third lower extended storage portion  134   b,  and a third overlapped extended storage portion  135   c.    
         [0045]    A gate insulating layer  140  formed with silicon nitride (SiNx) or silicon oxide (SiOx) is formed on the first gate line  121   aq,  the second gate line  121   bq,  the third gate line  121   cq,  the first storage electrode line  131   aq,  the second storage electrode line  131   bq,  and the third storage electrode line  131   cq.    
         [0046]    A semiconductor layer  150  including amorphous silicon (a-Si) is formed on the gate insulating layer  140 . The semiconductor layers  150  includes a first semiconductor layer  150   a  overlapping with the first gate electrode  124   a,  a second semiconductor layer  150   b  overlapping with the second gate electrode  124   b,  and a third semiconductor layer  150   c  overlapping with the third gate electrode  124   c.  Ohmic contact members  163  and  165  are formed on the semiconductor layer  150 . The ohmic contact members  163  and  165  may be formed with a material such as n+ hydrogenated amorphous silicon doped with an n-type impurity such as phosphorous at high concentration, or may be formed with silicide. The ohmic contact members  163  and  165  are disposed on the semiconductor layer  150  as a pair. 
         [0047]    On the ohmic contact members  163  and  165  and gate insulating layer  140 , data lines  171  and drain electrodes  175  are formed, and the drain electrodes include a first drain electrode  175   a,  a second drain electrode  175   b,  and a third drain electrode  175   c.    
         [0048]    The data line  171  transmits a data signal, and substantially extends to a second direction such that it crosses the first gate line  121   aq,  the second gate line  121   bq,  and the third gate line  121   cq.  The data line  171  crosses the first storage electrode line  131   aq,  the second storage electrode line  131   bq,  and the third storage electrode line  131   cq.  The data line  171  includes a source electrode  173  extending toward the gate electrode  124 , and the source electrode  173  includes a first source electrode  173   a  extending toward the first gate electrode  124   a,  a second source electrode  173   b  extending toward the second gate electrode  124   b,  and a third source electrode  173   c  extending toward the third gate electrode  124   c.    
         [0049]    The first drain electrode  175   a,  the second drain electrode  175   b,  and the third drain electrode  175   c  are separated with the data line  171 , and the first drain electrode  175   a  faces the first source electrode  173   a,  centering the first gate electrode  124   a  therebetween, the second drain electrode  175   b  faces the second source electrode  173   b,  centering the second gate electrode  124   b  therebetween, and the third drain electrode  175   c  faces the third source electrode  173   c,  centering the third gate electrode  124   c  therebetween. 
         [0050]    The drain electrode  175  includes a drain extending portion  176 , that is, a wide one end portion, and an overlapping electrode  177  extends from the drain extending portion  176 . The drain extending portion  176  overlaps with the extended storage portion  135  of the storage electrode line  131 , and the overlapping electrode  177  has the same shape of the storage electrode line  131  and overlaps with the storage electrode line  131 . 
         [0051]    The overlapping electrodes  177  include a first overlapping electrode  177   a  connected with the first drain extending portion  176   a  of the first drain electrode  175   a,  a second overlapping electrode  177   b  connected with the second drain extending portion  176   b  of the second drain electrode  175   b,  and a third overlapping electrode  177   c  connected with the third drain extending portion  176   c  of the third drain electrode  175   c.  The first overlapping electrode  177   a,  the second overlapping electrode  177   b,  and the third overlapping electrode  177   c  are separated from each other. 
         [0052]    The overlapping electrode  177  includes extended overlapping portions  178  and  179  overlapping the extended storage portions  133  and  134  to extend storage capacity, and the extended overlapping portion  178  includes an upper extended overlapping portion  178  extending upward from the overlapping electrode  177  and a lower extended overlapping portion  179  extending downward from overlapping electrode  177 . In the present embodiment, two upper extended overlapping portions  178  and two lower extended overlapping portions  179 . 
         [0053]    The first gate electrode  124   a,  the first source electrode  173   a,  and the first drain electrode  175   a  form a first thin film transistor TFT 1  with the first semiconductor layer  150   a,  and a channel of the first thin film transistor TFT 1  is formed in a first semiconductor layer  150   a  between the first source electrode  173   a  and the first drain electrode  175   a.  Likely, a second thin film transistor TFT 2  is formed of the second gate electrode  124   b,  the second source electrode  173   b,  the second drain electrode  175   b,  and the second semiconductor layer  150   b,  and a third thin film transistor TFT 3  is formed of the third gate electrode  124   c,  the third source electrode  173   c,  the third drain electrode  175   c,  and the third semiconductor layer  150   c.    
         [0054]    The first thin film transistor TFT 1  is disposed between the first storage electrode line  131   aq  and the first gate line  121   aq,  the second thin film transistor TFT 2  is disposed between the second storage electrode line  131   bq  and the second gate line  121   bq,  and the third thin film transistor TFT 3  is disposed between the third storage electrode line  131   cq  and the third gate line  121   cq.    
         [0055]    In addition, the first drain extending portion  176   a,  the second drain extending portion  176   b,  and the third drain extending portion  176   c  are respectively disposed adjacent to the first thin film transistor TFT 1 , the second thin film transistor TFT 2 , and the third thin film transistor TFT 3 . Thus, the first drain extending portion  176   a  and the first thin film transistor TFT 1 , the second drain extending portion  176   a  and the second thin film transistor TFT 2 , the third drain extending portion  176   a  and the third thin film transistor TFT 3  that causes deterioration of the aperture ratio are respectively arranged at an outer portion of the first pixel electrode  190   a,  an outer portion of the second pixel electrode  190   b,  and an outer portion of the third pixel electrode  190   c  such that the aperture ratio can be improved. 
         [0056]    The ohmic contact members  163  and  165  exist only between the semiconductor layer  150  and the source electrode  173  and the drain electrode  175  to decrease contact resistance therebetween. 
         [0057]    A passivation layer  180  is formed on the data line  171 , the drain electrode  175 , and an exposed portion of the semiconductor layer  150 . The passivation layer  180  is formed with an inorganic insulating material such as silicon nitride or silicon oxide, an organic insulating material, or a low dielectric constant insulating material. An organic insulating material having photosensitivity may be used to form the passivation layer  180 , and the surface of the passivation layer  180  may be flat. However, the passivation layer  180  may have of a dual-layer structure in which an inorganic layer is a lower layer and an organic layer is an upper layer so that an excellent insulating characteristic of the organic layer is ensured while preventing the exposed semiconductor layer  150  from being damaged. 
         [0058]    A contact hole  181  that exposes the drain electrode  175  is formed in the passivation layer  180 , and a pixel electrode  190  is formed on the passivation layer  180 . The contact hole  181  includes a first contact hole  181   a  exposing the first drain electrode  175   a,  a second contact hole  181   b  exposing the second drain electrode  175   b,  and a third contact hole  181   c  exposing the third drain electrode  175   c.    
         [0059]    The pixel electrodes  190  includes a first pixel electrode  190   a  disposed between the third storage electrode line  131   cp  of the previous storage electrode line group and the first storage electrode line  131   aq  of the present storage electrode line group, a second pixel electrode  190   b  disposed between the first storage electrode line  131   aq  and the second storage electrode line  131   bq  of the present storage electrode line group, and a third pixel electrode  190   c  disposed between the second storage electrode line  131   bq  and the third storage electrode line  131   cq  of the present storage electrode line group. 
         [0060]    Thus, the third gate line  121   cp  of the previous gate line group crosses a center portion of the first pixel  190   a  in a row direction, the first gate line  121   aq  of the present gate line group crosses a center portion of the second pixel electrode  190   b  in a row direction, and the second gate line  121   bq  of the present gate line group crosses a center portion of the third pixel electrode  191   c  in a row direction. 
         [0061]    As described, the first pixel electrode  190   a,  the second pixel electrode  190   b,  and the third pixel electrode  190   c  do not overlap with the first storage electrode line  131   aq,  the second storage electrode line  131   bq,  and the third storage electrode line  131   cq  so that the aperture ratio can be improved. 
         [0062]    The first pixel electrode  190   a  includes three first sub-pixel electrodes. The three first sub-pixel electrodes  191   a,    192   a,  and  193   a  are formed of a left-side first sub-pixel electrode  191   a,  a center first sub-pixel electrode  192   a,  and a right-side first sub-pixel electrode  193   a.    
         [0063]    A center portion of the left-side first sub-pixel electrode  191   a  corresponds to a left-side first cut-out portion  271   a  of the common electrode  270 , a center portion of the center first sub-pixel electrode  192   a  corresponds to a center first cut-out portion  272   a  of the common electrode  270 , and a center portion of the right-side first sub-pixel electrode  193   a  corresponds to a right-side first cut-out portion  273   a  of the common electrode  270 . 
         [0064]    Likely, the second pixel electrode  190   b  includes three second sub-pixel electrodes  191   b,    192   b,  and  193   b.  The three second sub-pixel electrodes  191   b,    192   b,  and  193   b  are formed of a left-side second sub-pixel electrode  191   b,  a center second sub-pixel electrode  191   b,  and a right-side second sub-pixel electrode  193   b.  A center portion of the left-side second sub-pixel electrode  191   b  corresponds to a left-side second cut-out portion  271   b  of the common electrode  270 , a center portion of the center second sub-pixel electrode  191   b  corresponds to a center second cut-out portion  272   b  of the common electrode  270 , and a center portion of the right-side second sub-pixel electrode  193   b  corresponds to a right-side second cut-out portion  273   b  of the common electrode  270 . Further, the third pixel electrode  190   c  includes three third sub-pixel electrodes  191   c,    192   c,  and  193   c.  The three third sub-pixel electrodes  191   c,    192   c,  and  193   c  are formed of a left-side third sub-pixel electrode  191   c,  a center third sub-pixel electrode  192   c,  and right-side third sub-pixel electrode  193   c.  A center portion of the left-side third sub-pixel electrode  191   c  corresponds to a left-side third cut-out portion  271   c  of the common electrode  270 , a center portion of the center third sub-pixel electrode  192   c  corresponds to a center third cut-out portion  272   c  of the common electrode  270 , and a center portion of the right-side third sub-pixel electrode  193   c  corresponds to a right-side third cut-out portion  273   c  of the common electrode  270 . 
         [0065]    Thus, a periphery of each of the first sub-pixel electrodes  191   a,    192   a,  and  193   a  forms a fringe field with the first cut-out portions  271   a,    272   a,  and  273   a  of the common electrode  270 , a periphery of each of the second sub-pixel electrodes  191   b,    192   b,  and  193   b  forms a fringe field with the second cut-out portions  271   b,    272   b,  and  273   b  of the common electrode  270 , and a periphery of each of the third sub-pixel electrodes  191   c,    192   c,  and  193   c  forms a fringe field with the third cut-out portions  271   c,    272   c,  and  273   c  of the common electrode  270 . Thus, wide angle view is realized. 
         [0066]    The first pixel electrode  190   a,  the second pixel electrode  190   b,  and the third pixel electrode  190   c  may be formed with a transparent conductive material such as ITO or IZO or a reflective metal such as aluminum, silver or an alloy thereof. 
         [0067]    The pixel electrode  190  is physically and electrically connected with the drain electrode  175  through the contact hole  182 , and receives a data voltage from the drain electrode  175 . Applied with the data voltage, the pixel electrode  190  generates an electric field with the common electrode  270  of the color filter display panel receiving a common voltage, thereby determining a direction of liquid crystal molecules of a liquid crystal layer  3  between the two electrodes. The pixel electrode  190  and the common electrode  270  form a capacitor (hereinafter, referred to as a liquid crystal capacitor) to maintain an applied voltage after the thin film transistor is turned off. 
         [0068]    The overlapping electrode  177  is connected with the pixel electrode  190  through the drain electrode  175  and thus the overlapping electrode  177  and the storage electrode line  131  overlap with each other such that a storage capacitor is formed. The storage capacitor reinforces voltage storage capacitor of the liquid crystal capacitor. 
         [0069]    The first upper extended storage portion  133   a  extended from the first storage electrode line  131   aq  is disposed between the left-side first sub-pixel electrode  191   a  and the center first sub-pixel electrode  192   a  and between the center first sub-pixel electrode  192   a  and the right-side first sub-pixel electrode  193   a.  The first lower extended storage portion  134   a  extended from the first storage electrode line  131   aq  is disposed between the left-side second sub-pixel electrode  191   b  and the center second sub-pixel electrode  191   b  and between the center second sub-pixel electrode  191   b  and the right-side second sub-pixel electrode  193   b.  In addition, the second upper extended storage portion  133   b  extended from the second storage electrode line  131   bq  is disposed between the left-side second sub-pixel electrode  191   b  and the center second sub-pixel electrode  191   b  and between the center second sub-pixel electrode  191   b  and the right-side second sub-pixel electrode  193   b.  The second lower extended storage portion  134   b  extended from the second storage electrode line  131   bq  is disposed between the left-side third sub-pixel electrode  191   c  and the center third sub-pixel electrode  192   c  and between the center third sub-pixel electrode  192   c  and the right-side third sub-pixel electrode  193   c.  In addition, the third upper extended storage portion  133   c  extended from the third storage electrode line  131   cq  is disposed between left-side third sub-pixel electrode  191   c  and the center third sub-pixel electrode  192   c  and between the center third sub-pixel electrode  192   c  and the right-side third sub-pixel electrode  193   c.    
         [0070]    Meanwhile, a first upper extended overlapping portion  178   a  extended from the first overlapping electrode  177   a  is disposed between the left-side first sub-pixel electrode  191   a  and the center first sub-pixel electrode  192   a  and between the center first sub-pixel electrode  192   a  and the right-side first sub-pixel electrode  193   a.  A first lower extended overlapping portion  179   a  extended from the first overlapping electrode  177   a  is disposed between the left-side second sub-pixel electrode  191   b  and the center second sub-pixel electrode  191   b  and between the center second sub-pixel electrode  191   b  and the right-side second sub-pixel electrode  193   b.  In addition, a second upper extended overlapping portion  178   b  extended from the second overlapping electrode  177   b  is disposed between the left-side second sub-pixel electrode  191   b  and the center second sub-pixel electrode  191   b  and between the center second sub-pixel electrode  191   b  and the right-side second sub-pixel electrode  193   b.  A second lower extended overlapping portion  179   b  extended from the second overlapping electrode  177   b  is disposed between the left-side third sub-pixel electrode  191   c  and the center third sub-pixel electrode  192   c  and between the center third sub-pixel electrode  192   c  and the right-side third sub-pixel electrode  193   c.  In addition, a third upper extended overlapping portion  178   c  extended from the third overlapping electrode  177   c  is disposed between the left-side third sub-pixel electrode  191   c  and the center third sub-pixel electrode  192   c  and between the center third sub-pixel electrode  192   c  and the right-side third sub-pixel electrode  193   c.    
         [0071]    As described, the storage electrode line  131  and the overlapping electrode  177  do not overlap with the pixel electrode  190  so that the aperture ratio can be improved. Further, the storage electrode line  131  and the overlapping electrode  177  respectively form the extended storage portions  133  and  134  and the extended overlapping portions  178  and  179  between the first sub-pixel electrodes  191   a,    192   a,  and  193   a,  between the second sub-pixel electrodes  191   b,    192   b,  and  193   b,  and between the third sub-pixel electrodes  191   c,    192   c,  and  193   c  so that the overlapped area can be increased without forming an additional storage electrode such that the aperture ratio can be improved while simultaneously improving the aperture ratio. 
         [0072]    In addition, since the storage capacity is improved, a kickback voltage can be reduced. 
         [0073]    The color filter display panel  200  facing the thin film transistor display panel  100  maintains a gap between the color filter display panel  200  and the thin film transistor display panel  100  by a spacer  350 . 
         [0074]    The color filter display panel  200  includes a light blocking member, called as black matrix on a second substrate  210 . In one embodiment, the second substrate  210  is formed with transparent glass and the like. The light blocking member  220  is formed with a metal like chromium or an organic material. The light blocking member  220  includes a plurality of opening areas  221  exposing the second substrate  210 . 
         [0075]    One opening area  221  of the light blocking member  220  corresponds to one pixel, the first opening area  221   a,  the second opening area  221   b,  and the third opening area  221   c  of the light blocking member  220  respectively correspond to the first pixel electrode  190   a,  the second pixel electrode  190   b,  and the third pixel electrode  190   c.    
         [0076]    A color filter  230  is formed, partially overlapping the light blocking member  220  on the substrate  210 , and the color filter  230  is disposed to be almost inserted into the opening area  221  defined by the light blocking member  220 . Each color filter  230  may represent one of three primary colors, red, green, and blue. The color filters  230  arranged in a column direction may represent the same color. 
         [0077]    A protection member  330  formed with an organic material is formed on the color filter  230 . The protection member  330  prevents the color filter  230  from being exposed to protect the color filter  230  from an etching solution of the common electrode  270 . 
         [0078]    On the protection member  330 , the common electrode is formed with a transparent conductive material such as ITO or IZO. The common electrode  270  receives the common voltage and includes the cut-out portions  271   a,    272   a,    273   a,    271   b,    272   b,    273   b,    271   c,    272   c,  and  273   c,  and the spacer  350  formed with the same material of the protection member  330  is formed on the protection member  330 . The spacer  350  is formed to maintain the gap between the color filter display panel  200  and the thin film transistor display panel  100 . 
         [0079]    While this disclosure has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. 
         [0000]    
       
         
               
             
               
               
               
             
           
               
                   
               
               
                 &lt;Description of symbols&gt; 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 121: gate line 
                 131: sustain electrode 
               
               
                   
                 140: gate insulating layer 
                 171: data line 
               
               
                   
                 177: overlapping electrode 
                 190: pixel electrode 
               
               
                   
                 220: light blocking member 
                 230: color filter 
               
               
                   
                 270: common electrode 
                 330: protection member 
               
               
                   
                 350: spacer