KR20110024120A - In-plane switching mode lcd - Google Patents

Abstract

PURPOSE: An in-plane switching mode LCD is provided to reduce VAC(View Angle Crosstalk) resulting from outer common electrodes and a data wire placed on the electrodes and improve the aperture ratio. CONSTITUTION: An upper substrate which is a color substrate is distanced from and faces a lower plate which is an array substrate. A liquid crystal layer is placed between the upper and lower substrates. A common electrode and a pixel electrode are formed on the lower substrate, and the liquid crystal layer is activated through lateral field. A data wire which defines a pixel region is formed on a gate insulation layer(121). The gate insulation layer is formed on an outer common electrode, a gate wire and a common wire.

Description

Array board for transverse electric field type liquid crystal display device and manufacturing method thereof {In-Plane switching mode LCD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a transverse electric field type liquid crystal display device having improved aperture ratio and VAC (View angle crosstalk).

Generally, the driving principle of a liquid crystal display device utilizes the optical anisotropy and polarization properties of a liquid crystal. Since the liquid crystal is thin and long in structure, the liquid crystal has directivity in the arrangement of molecules, and the direction of the molecular arrangement can be controlled by artificially applying an electric field to the liquid crystal.

Accordingly, if the molecular arrangement direction of the liquid crystal is arbitrarily adjusted, the molecular arrangement of the liquid crystal is changed, and light is refracted in the molecular arrangement direction of the liquid crystal due to optical anisotropy to express image information.

Currently, an active matrix liquid crystal display device (AM-LCD: below Active Matrix LCD, abbreviated as liquid crystal table market value), in which a thin film transistor and pixel electrodes connected to the thin film transistor are arranged in a matrix manner, has the best resolution and video performance. It is attracting attention.

The liquid crystal display includes a color filter substrate on which a common electrode is formed, an array substrate on which pixel electrodes are formed, and a liquid crystal interposed between the two substrates. In such a liquid crystal display, the common electrode and the pixel electrode are caused by an electric field applied up and down. It is excellent in the characteristics, such as transmittance | permeability and aperture ratio, by the method of driving a liquid crystal.

However, the liquid crystal drive due to the electric field applied up and down has a disadvantage that the viewing angle characteristics are not excellent.

Accordingly, a transverse field type liquid crystal display device having excellent viewing angle characteristics has been proposed to overcome the above disadvantages.

Hereinafter, a general transverse electric field type liquid crystal display device will be described in detail with reference to FIG. 1.

1 is a cross-sectional view of a general transverse electric field type liquid crystal display device.

As shown, the upper substrate 9, which is a color filter substrate, and the lower substrate 10, which is an array substrate, are spaced apart from each other, and the liquid crystal layer 11 is interposed between the upper and lower substrates 9, 10. It is.

The common electrode 17 and the pixel electrode 30 are formed on the lower substrate 10 on the same plane. In this case, the liquid crystal layer 11 is formed by the common electrode 17 and the pixel electrode 30. It is operated by the horizontal electric field (L).

2A and 2B are cross-sectional views illustrating operations of on and off states of a general transverse electric field type liquid crystal display device, respectively.

First, referring to FIG. 2A, which illustrates an arrangement of liquid crystals in an on state where a voltage is applied, a phase change of a liquid crystal 11a at a position corresponding to the common electrode 17 and the pixel electrode 30 is performed. Although the liquid crystal 11b positioned in the section between the common electrode 17 and the pixel electrode 30 is formed by the horizontal electric field L formed by applying a voltage between the common electrode 17 and the pixel electrode 30, It is arranged in the same direction as the horizontal electric field (L). That is, in the transverse electric field type liquid crystal display device, since the liquid crystal moves by the horizontal electric field, the viewing angle is widened.

Therefore, when the transverse electric field type liquid crystal display device is viewed from the front, it can be seen in the up / down / left / right directions even in the about 80 to 85 ^o direction without inversion phenomenon.

Next, referring to FIG. 2B, since no voltage is applied to the liquid crystal display, a horizontal electric field is not formed between the common electrode and the pixel electrode, so that the arrangement state of the liquid crystal layer 11 does not change.

FIG. 3 is a cross-sectional view of a center of one pixel area cut parallel to a direction in which a data line extends in a conventional transverse electric field type liquid crystal display device.

First, the outermost common electrode 49 is formed on the inner surface of the array substrate 40 so as to be spaced apart from each other. Although not shown in the drawing, the gate wiring (not shown) extending in one direction and the outermost common electrode ( 49a) and a common wiring (not shown) is further formed. In addition, a gate insulating film 50 is formed over the outermost common electrode 49a, the gate wiring (not shown), and the common wiring (not shown).

Next, a data line 60 is formed on the gate insulating layer 50 to define the pixel region P by crossing the gate line (not shown). In this case, the data line 60 is formed to define the pixel area P, and is formed at a boundary between one adjacent pixel area P. In this case, the data line 60 is formed in each pixel area. It can be seen that it is formed between the outermost common electrode 49a of (P).

Next, a passivation layer 65 is formed on an entire surface of the data line 60, and a plurality of central portions are formed on the passivation layer 65 to be spaced apart from each other at predetermined intervals in the pixel area P. The common electrode 49b and the pixel electrodes 70a and 70b are formed. In addition, a first alignment layer 75 is formed on the plurality of central common electrodes 49b and the pixel electrodes 70a and 70b in a predetermined direction with respect to the entire surface of the array substrate 40.

In response to the array substrate 40 having such a configuration, the widths of the wirings 60 are wider than those of the gates and data wirings 60 not forming the boundary of each pixel region P. Referring to FIG. A color filter layer 84 including red, green, and blue color filter patterns sequentially arranged with the black matrix 82, and the array substrate on the front surface of the black matrix 82 and the color filter layer 84 under the black matrix 82. The color filter substrate 80 including the second alignment layer 86 oriented in the same direction as the alignment direction of the first alignment layer 75 included in the 40 is disposed between the two substrates 40 and 80. The liquid crystal layer 92 is provided in the cross section to form the transverse electric field type liquid crystal display device 35.

Meanwhile, the conventional transverse electric field type liquid crystal display device 35 having the above-described configuration drives the liquid crystal by a transverse electric field generated between the adjacent pixel electrodes 70a and 70b and the common electrodes 49a and 49b. In addition, an unwanted transverse electric field is generated between the data line 60 and the outermost common electrode 49a formed to be spaced apart from the data line 60 to drive liquid crystals, causing light leakage and causing a view angle crosstalk (VAC).

Accordingly, the outermost common electrode 49a and the data line 60 may be separated from each other by including a spaced area between the outermost common electrode 49a and the data line 60 to prevent light leakage and VAC. A black matrix 82 having a sufficiently large width to cover is formed.

In this case, the black matrix 82 should be formed sufficiently wide in consideration of the bonding margin between the color filter substrate 80 and the array substrate 40. At this time, in order to prevent VAC in consideration of the bonding margin and the viewing angle characteristic, the width of the outermost common electrode 49a is at least about 11.5 μm, including the width of the outermost common electrode 49a and the data line 60. The area of to be masked through the black matrix 82.

Accordingly, as illustrated, the black matrix 82 completely covers the outermost electrode 49a and further overlaps the outermost pixel electrode partially formed to form a storage capacitor with the outermost common electrode 49a. It is formed so that it may completely cover up to 70a).

However, as described above, the black matrix 82 having a large width is formed to overlap the data line 60 and the outermost common electrode 49a and the outermost pixel electrode 70a disposed therebetween. The situation is that the aperture ratio is lowered and the luminance is finally reduced.

When the brightness is lowered, measures such as increasing the number of lamps in the backlight unit are required to compensate for brightness, which leads to an increase in manufacturing cost, which in turn weakens the price competitiveness of the product.

The present invention is to solve the problems of the conventional transverse electric field type liquid crystal display device, to reduce the view angle crosstalk (VAC) by the outermost common electrode located in the data wiring and the surroundings, and to improve the aperture ratio transverse field type liquid crystal display The object is to provide a device.

Furthermore, it is another object to improve the price competitiveness by increasing the relative brightness by increasing the relative brightness to reduce the number of lamps used.

According to an aspect of the present invention, there is provided a transverse electric field type liquid crystal display device comprising: a gate wiring and a data wiring formed on a first substrate to define a pixel region by crossing each other with a gate insulating film interposed therebetween; A common wiring formed parallel to the gate wiring and an outermost common electrode formed to branch from the common wiring and spaced apart from the data wiring at the outermost portion of the pixel region in parallel with the data wiring; A thin film transistor connected to the gate line and the data line in the pixel area; A protective layer having a drain contact hole exposing the drain electrode of the thin film transistor over the thin film transistor and the data line and a common contact hole exposing the common wiring; A plurality of pixel electrodes contacting the drain electrode of the thin film transistor through the drain contact hole and spaced apart from each other above the passivation layer; A plurality of central common electrodes in contact with the common wiring through the common contact hole, spaced apart from the outermost common electrode, and simultaneously formed to alternate with the plurality of pixel electrodes; The data line is formed on an entire surface of the first substrate over the plurality of pixel electrodes and the central common electrode, and is disposed in a first region including a spaced area between the data line and the outermost common electrode and a first portion of the outermost common electrode. A first alignment layer aligned in a first direction parallel to a longitudinal direction of, and oriented in a second direction different from the first direction so as to correspond to the second region except for the first region; A second substrate facing the first substrate; A black matrix formed on an inner surface of the second substrate to correspond to the boundary of the pixel region; A color filter layer formed under the black matrix; A second alignment layer covering the color filter layer and oriented to have the same alignment direction as the first alignment layer facing the color filter layer; And a liquid crystal layer interposed between the first and second alignment layers, wherein the black matrix is formed to cover a boundary between the first region and the second region.

In this case, the first region does not drive the liquid crystal molecules in the liquid crystal layer even when an electric field is generated between the data line and the outermost common electrode under the influence of the first and second alignment layers oriented in the first direction. The black state is always displayed.

The black matrix may be formed to cover all of the separation area between the data line and the outermost common electrode on both sides thereof, or the black matrix formed to cover the boundary between the first area and the second area may be dualized. The black matrix may be formed to be spaced apart from each other on both sides of the data line, and in this case, the black matrix formed in the binary spaced apart from both sides of the data line may be a bonding margin between the color filter substrate and the array substrate. The width is 6 µm to 10 µm, respectively, in consideration of 3 µm to 5 µm so that the boundary between the first region and the second region is always hidden.

In addition, the outermost and center common electrode and the pixel electrode has a structure symmetrically bent with respect to the center portion of each pixel area. In this case, the data line also has a structure bent with respect to the central portion of each pixel area to form a zigzag shape with respect to the entire surface of the array substrate.

The outermost pixel electrode formed at the outermost portion of each pixel region among the plurality of pixel electrodes may be formed to overlap the outermost common electrode.

First and second dummy patterns may be formed under the data line as a semiconductor material.

The array substrate for a transverse electric field type liquid crystal display device according to the present invention is arranged in a pixel area and an area where the data line and the outermost common electrode are formed by performing an orientation alignment in a portion where the data line and the outermost common electrode are formed. Even if an electric field is generated by the data line and the outermost common electrode, the liquid crystal does not move, thereby minimizing the width in the pixel region covered by the black matrix, thereby improving the aperture ratio.

In addition, since the liquid crystal is not driven by an electric field generated between the data line and the outermost common electrode, the black state is always displayed, thereby preventing the view angle crosstalk (VAC).

In addition, the aperture ratio is improved, thereby increasing the luminance, thereby reducing the number of lamps required to express the same luminance, thereby reducing manufacturing costs.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

4 is a cross-sectional view of one pixel area including a switching element of a transverse electric field type liquid crystal display device according to an embodiment of the present invention, and FIG. 5 includes a data line of a transverse electric field type liquid crystal display device according to an embodiment of the present invention. This is a plan view of some of its surroundings.

 As shown, the transverse electric field type liquid crystal display device according to the exemplary embodiment of the present invention includes a lower array substrate, an upper color filter substrate, and a liquid crystal layer interposed between these two substrates.

First, referring to the configuration of the array substrate 110, the gate electrode 115 is formed in the switching region TrA in which the switching elements are formed in each pixel region P of the inner surface facing the color filter substrate. In this case, although not shown in the drawing, a gate wiring (not shown) is connected to the gate electrode 115 on the same layer as the gate electrode 115. In addition, a common wiring (not shown) is formed to be spaced apart from the gate wiring (not shown), branched from the common wiring (not shown), and the outermost common electrode 118a at the outermost portion of each pixel region P. ) Is formed.

Next, a gate insulating layer 121 is formed over the gate electrode 115, the gate wiring (not shown), the common wiring (not shown), and the outermost common electrode 118a, and above the gate insulating layer 121. A semiconductor layer 130 including an active layer 125 of amorphous silicon and an impurity amorphous silicon and spaced apart from each other is formed in the switching region TrA, and is formed on the semiconductor layer 130. The source electrode 140 and the drain electrode 143 are spaced apart from each other. In this case, the gate electrode 115, the gate insulating layer 121, and the source and drain electrodes 140 and 143 spaced apart from each other and sequentially stacked on the switching region TrA are thin film transistors (switching elements). Tr).

In addition, a data line 135 is formed on the gate insulating layer 121 to intersect the gate line (not shown) to define the pixel region P, and is connected to the source electrode 140. In this case, in the drawing, the first dummy pattern 126 made of the same material forming the active layer 125 and the second dummy made of the same material forming the ohmic contact layer 128 are disposed below the data line 135. Although the pattern 129 is formed, these first and second dummy patterns 125 and 128 may be omitted.

Next, a drain contact hole 153 exposing the drain electrode 143 of the thin film transistor Tr over the thin film transistor Tr and the data line 135, and a common contact exposing the common wiring (not shown). A protective layer 150 having holes (not shown) is formed.

In addition, a first connection pattern (not shown) connected to the common wiring (not shown) and the first connection pattern (not shown) through the common contact hole (not shown) as a transparent conductive material on the protective layer 150. In the pixel region P, the plurality of central common electrodes 167 are spaced apart from each other in parallel with the data line 135. In addition, the second connection pattern 161 which contacts the drain electrode 143 through the drain contact hole 153 and the second connection pattern 161 are spaced apart from each other by being separated from the second connection pattern 161. A plurality of pixel electrodes 163a and 163b spaced apart from each other and alternately disposed with the plurality of common electrodes 167 are formed. In this case, the plurality of common electrodes 118 and 167 and the pixel electrodes 163a and 163b are formed. It is characterized by being arranged in parallel with the data line 135.

In this case, the outermost common electrode 118 and the plurality of pixel electrodes 163a and 163b formed in the pixel region P are located in the outermost pixel electrode (hereinafter, referred to as the outermost pixel electrode 163a). ) Shows a structure in which the outermost common electrode 118 and a portion thereof overlap to form a storage capacitor. However, when the storage capacitor is composed of other components, the common wiring (not shown) and When forming the storage capacitor by overlapping the second connection pattern (not shown), the outermost pixel electrode 163a is not necessarily formed to overlap the outermost common electrode 118.

Meanwhile, the plurality of pixel electrodes 163a and 163b and the common electrodes 118 and 167 may form a straight bar in each pixel area P or prevent color inversion at a particular viewing angle. In order to implement multiple domains in one pixel region P, the pixel region P may be symmetrically bent with respect to the central portion of each pixel region P. FIG. In this case, the data line 135 is also bent at the center of each pixel region P, and the data line 135 is zigzag through the entire surface of the array substrate 110.

Next, a first alignment layer 175 is formed on the entire surface of the plurality of pixel electrodes 163a and 163b and the central common electrode 167. In this case, the first alignment layer 175 may be a most distinctive portion of the present invention, and the first alignment layer 175 may include a spaced region between the data line 135 and the outermost common electrode 118 of the pixel region P, more precisely, the pixel region P; An area excluding a portion of the outermost common electrode 118 (hereinafter, referred to as a first region A1) is 0 in the length direction of the plurality of pixel electrodes 163a and 163b and the common electrodes 118 and 167. It is not a degree, but a predetermined angle is oriented in a first direction having a predetermined direction of an angle of about 5 to 20 degrees, and the separation region between the data line 135 and the outermost common electrode 118 and The area corresponding to a region including a part of the outermost common electrode 118 (hereinafter referred to as a second region A2) is oriented in a second direction parallel to the extension direction of the data line 135.

Meanwhile, as described above with respect to the first alignment layer 175, the first alignment layer 175 may be aligned to have a first direction, and a specific portion, that is, a second portion different from the first direction with respect to the second region, may be formed. An orientation treatment for aligning in two directions is characterized by a UV alignment apparatus or the like capable of orientation control in units of several μm. In this case, the first alignment layer 175 is provided with a plurality of functional groups on its surface, and is made of a polymer material in which the functional groups are aligned in a specific direction in response to UV light.

Looking at the configuration of the color filter substrate 180 facing the array substrate 110 having the above-described configuration, the boundary of the pixel region (P) of the array substrate 110 on the inner side facing the array substrate 110 That is, a black matrix 182 is formed corresponding to the gate wiring (not shown) and the data wiring 135, and overlaps the black matrix 182 and corresponds to the pixel region P in red, green, and blue colors. The color filter layer 184 in which the color filter pattern is sequentially repeated is formed.

In addition, a second alignment layer 186 is formed to cover the color filter layer 184, and the second alignment layer 186 also has the same alignment structure as the first alignment layer 175 facing the color filter layer 184. Is characteristic. That is, the portion corresponding to the first area A1 is aligned in a first direction not parallel to the plurality of common electrodes 118 and 167 and the pixel electrodes 163a and 163b and corresponds to the data line 135. The data line 135 may include a space between the data line 135 and the neighboring outermost common electrode 118 and the second region A2 corresponding to a portion of the outermost common electrode 118. It is characterized by being oriented in the second direction parallel to the wiring 135. In the first and second alignment layers 175 and 186, the liquid crystal molecules in the liquid crystal layer 192 corresponding to the pixel region P are configured to have different alignment directions, so that the common electrodes 118 and 167 and the pixel electrodes ( In response to the transverse electric field expressed by 163a and 163b, the gray level from white to black is displayed by rotating in one direction according to the change in the intensity of the electric field, but the liquid crystal layer 192 corresponding to the second area A2. Note that the liquid crystal molecules in Fig. 2 are in a state where their major axis direction is arranged in parallel with the data line 135 due to the alignment direction, even though a transverse electric field is generated by the outermost common electrode 118 and the data line 135. Liquid crystal molecules do not drive in rotation. Accordingly, the second area A2 always shows a black state, and no light leakage occurs through the spaced area between the outermost common electrode 118 and the data line 135, and thus, no VAC is generated according to the viewing angle. Do not.

Therefore, as described above, the spaced region between the data line 135 and the outermost common electrode 118 is always in a black state, and the data line 135 and the outermost common electrode 118 are themselves opaque. It is made of a low-resistance metal material, so no light is transmitted. Therefore, the black matrix 182 formed to overlap these components on these components is not a problem even if the width formed to have a smaller width than the conventional.

In the conventional transverse electric field type liquid crystal display device, the black matrix is formed inside the pixel area more than both ends, including both ends of the data line and the outermost common electrode to prevent VAC according to light leakage and viewing angle. When the outermost common electrode and the outermost pixel electrode overlap each other to form a storage capacitor, the outermost common electrode and the outermost pixel electrode also overlap completely with the outermost pixel electrode.

However, in the case of the transverse electric field liquid crystal display device 101 according to the present invention, the black matrix 182 may prevent VAC according to light leakage and viewing angle even when the black matrix 182 is formed to have a relatively thin width compared to the conventional transverse electric field liquid crystal display device. As a result, it is characterized in that the width is formed to have a relatively small width as compared with the prior art. That is, in the transverse electric field type liquid crystal display device 101 according to the present invention, the black matrix 182 has a first area A1 and a second area that are aligned to have a boundary portion having a different alignment direction, that is, a first alignment direction. It is characterized in that it is formed in consideration of the bonding margin of the array substrate 110 and the color filter substrate 180 in correspondence to the boundary of the second region (A2) oriented to have an alignment direction.

Typically, the bonding margin between the color filter substrate 180 and the array substrate 110 is about 3 μm to about 5 μm, and the boundary between the first area A1 and the second area A2 is the outermost common electrode. Corresponding to 118, the center of the outermost common electrode 118 is formed between one side facing the data line 135. Accordingly, the black matrix 182 may include the first region A1 oriented in the first direction by reflecting an error range of 3 μm to 5 μm when the array substrate 110 and the color filter substrate 180 are bonded to each other. It is characterized in that the end thereof is formed so as to expose about 3 to 5 占 퐉 in the outer edge of the boundary of the second region A2 oriented in the second direction.

The common electrodes 118 and 167 and the pixel electrodes 163a and 163b are formed to have a width of about 6 μm to 10 μm. Thus, for example, when the outermost common electrode 118 is formed to have a width of 8 μm, the boundary between the first region A1 and the second region A2 is located above the outermost common electrode 118. If formed at a point that is 1/4 in the other direction with respect to one side (the point 2㎛ apart from one side), the end of the black matrix 182 is always on the outermost common electrode 118, even considering the bonding margin It can be seen that it is located in. Therefore, the width of the black matrix 118 is to be reduced compared to the prior art. In the conventional case, in order to prevent VAC, at least 11.5 μm from the spaced area between the data line and the outermost common electrode had to be covered with the black matrix.

However, in the present invention, since the spaced area between the data line 135 and the outermost common electrode 118 always represents a black state, since the VAC can be prevented at the source, the end of the black matrix 182 is connected to the data line ( It is not necessary to form a width of 11.5 μm or more from the separation area between the outermost common electrode 118 and the outermost common electrode 118, and an end thereof is 3 μm outward from the boundary between the first area A1 and the second area A2. It only needs to be formed so as to be located at a distance of 5 μm. Accordingly, the width of the black matrix 182 of about 2.5 μm to 6.5 μm can be reduced for each pixel area P based on the end of the data line 135.

On the other hand, the transverse electric field type liquid crystal display device according to the embodiment of the present invention shows that the black matrix 182 is formed so as to cover the data line 135, but as a modification thereof, the data line includes the data line. Therefore, it is not a problem even if the black matrix 182 is removed for a portion of the outermost common electrode and the spaced area between the data wirings.

6 is a cross-sectional view of a transverse electric field type liquid crystal display device according to a modification of the embodiment of the present invention. Except for the form of the black matrix, since it has the same configuration as the embodiment, only the black matrix which is different from the embodiment will be described. In this case, the same reference numerals are given to the same components as in the embodiment.

As shown in the figure, in the transverse electric field type liquid crystal display device 101 according to a modification of the embodiment of the present invention, the black matrices 182a and 182b formed corresponding to each pixel area P form the data line 135. Including the outermost common electrode 118 and the part of the spaced area between the data line 135 and the outermost common electrode in which the boundary between the first region A and the second region A2 is located. 118) is characterized by being formed.

In the transverse electric field type liquid crystal display device 101 according to the embodiment and the modification of the present invention, the spaced area between the data line 135 and the outermost common electrode 118 always displays a black state. It is not necessary to cover to (182a, 182b), and has a width (6 μm to 10 μm) that can be reliably masked in consideration of the bonding margin only on the boundary between the first area A1 and the second area A2. It is a characteristic that the formed black matrices 182a and 182b are formed.

Thus, the widths of the black matrices 182a and 182b formed by being dualized corresponding to the boundary between the first area A1 and the second area A2 are 6 μm to 10 μm in consideration of the bonding margin. Since the width of the outer common electrode 118 is about 6 μm to 10 μm, a boundary between the first area A1 and the second area A2 is formed at the center of the width of the outermost common electrode 118. Assuming that no bonding error occurs, the black matrices 182a and 182b are formed to completely overlap with the outermost common electrode 118 formed to be spaced apart from both sides of the data line 135, respectively, as shown. do. Since the other components and the structure thereof are the same as in the embodiment, description is omitted.

Meanwhile, the transverse electric field type liquid crystal display device according to the above-described embodiments and modifications has a conventional transverse electric field type having a black matrix having a width of 11.5 μm or more from a spaced area between the data line and the outermost common electrode to prevent VAC according to the viewing angle. It can be seen that the opening ratio of about 3% to 10% is improved compared to the liquid crystal display.

1 is a cross-sectional view schematically showing a part of a general transverse electric field type liquid crystal display device.

2A and 2B are cross-sectional views showing operations of on and off states of a general transverse electric field type liquid crystal display device, respectively.

3 is a cross-sectional view showing a part of a conventional transverse electric field type liquid crystal display device.

4 is a cross-sectional view of one pixel area including a switching element of a transverse electric field type liquid crystal display device according to an exemplary embodiment of the present invention.

FIG. 5 is a plan view of a peripheral portion of the transverse field type liquid crystal display according to the exemplary embodiment of the present invention including data wirings. FIG.

6 is a cross-sectional view of one pixel area including a switching element of a transverse electric field type liquid crystal display device according to a modification of the embodiment of the present invention.

<Brief description of the main parts of the drawing>

101: transverse electric field type liquid crystal display device 110: the array substrate

115: gate electrode 118: outermost common electrode

121: gate insulating film 125: active layer

126: first dummy pattern 128: ohmic contact layer

129: second dummy pattern 130: semiconductor layer

135: data wiring 140: source electrode

143: drain electrode 150: protective layer

153: drain contact hole 163a: outermost pixel electrode

163b: center pixel electrode 167: center common electrode

175: first alignment layer 175a: first alignment layer oriented in the first direction

175b: first alignment layer oriented in the second direction

180: color filter substrate 182: black matrix

184: color filter layer 186: second alignment layer

186a: second alignment layer oriented in the first direction

186b: second alignment film oriented in the second direction

A1: first area A2: second area

P: pixel area TrA: switching area

Claims (9)

A gate wiring and a data wiring formed on the first substrate with the gate insulating film interposed therebetween to define a pixel region; A common wiring formed parallel to the gate wiring and an outermost common electrode formed to branch from the common wiring and spaced apart from the data wiring at the outermost portion of the pixel region in parallel with the data wiring; A thin film transistor connected to the gate line and the data line in the pixel area; A protective layer having a drain contact hole exposing the drain electrode of the thin film transistor over the thin film transistor and the data line and a common contact hole exposing the common wiring; A plurality of pixel electrodes contacting the drain electrode of the thin film transistor through the drain contact hole and spaced apart from each other above the passivation layer; A plurality of central common electrodes in contact with the common wiring through the common contact hole, spaced apart from the outermost common electrode, and simultaneously formed to alternate with the plurality of pixel electrodes; The data line is formed on an entire surface of the first substrate over the plurality of pixel electrodes and the central common electrode, and is disposed in a first region including a spaced area between the data line and the outermost common electrode and a first portion of the outermost common electrode. A first alignment layer aligned in a first direction parallel to a longitudinal direction of, and oriented in a second direction different from the first direction so as to correspond to the second region except for the first region; A second substrate facing the first substrate; A black matrix formed on an inner surface of the second substrate to correspond to the boundary of the pixel region; A color filter layer formed under the black matrix; A second alignment layer covering the color filter layer and oriented to have the same alignment direction as the first alignment layer facing the color filter layer; Liquid crystal layer interposed between the first and second alignment layer And the black matrix is formed to cover a boundary between the first area and the second area. The method of claim 1, The first region is always driven by the liquid crystal molecules in the liquid crystal layer not being driven even when an electric field is generated between the data line and the outermost common electrode under the influence of the first and second alignment layers oriented in the first direction. A transverse electric field liquid crystal display characterized by displaying a black state. The method of claim 1, And the black matrix is formed so as to cover all the spaced areas between the data line and the outermost common electrode located on both sides thereof. The method of claim 1, The black matrix formed to cover the boundary between the first area and the second area is dualized and spaced apart from both sides with respect to the data line, respectively. The method of claim 4, wherein The black matrix formed at the two sides and spaced apart from each other on the basis of the data line has a boundary between the first region and the second region in consideration of 3 μm to 5 μm, which is a bonding margin between the color filter substrate and the array substrate. A transverse electric field type liquid crystal display device characterized in that the width thereof is 6 µm to 10 µm, respectively. The method of claim 1, And wherein the outermost and central common electrodes and the pixel electrodes are symmetrically bent with respect to the central portion of each pixel region. The method of claim 6, And the data line is bent with respect to the center of each pixel area to form a zigzag shape with respect to the entire surface of the array substrate. The method of claim 1, And an outermost pixel electrode formed at an outermost part of each pixel region of the plurality of pixel electrodes to overlap the outermost common electrode. The method of claim 1, And a first and a second dummy pattern formed of a semiconductor material under the data line.

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