KR20060001248A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device in which a column spacer is formed on both sides of an intersection area of a gate wiring and a data wiring so that the upper and lower substrates are not pushed when a pushing force is applied to the liquid crystal panel in one direction. A first substrate, a second substrate having a color filter array corresponding to the TFT array, a projection pattern formed at a predetermined portion on the first substrate, and a first formed on the second substrate corresponding to both sides of the projection pattern And a liquid crystal layer filled between the second column spacer and the first substrate and the second substrate.

Column spacers, bonded light leakage, black matrix layers, openings, light shields, wiring intersections

Description

Liquid crystal display device

1 is an exploded perspective view showing a general liquid crystal display device

2 is a plan view showing a conventional liquid crystal display device

3 is a cross-sectional view taken along line II ′ of FIG. 2;

4 is a cross-sectional view taken along line II-II 'of FIG.

5 is a cross-sectional view of a structure in a direction crossing a data line in a pixel of another conventional structure;

6 is a cross-sectional view showing the upper and lower substrate twisted when the liquid crystal display device is pushed in one direction;

7 is a cross-sectional view illustrating light leakage after the liquid crystal display is pushed in one direction;

8 is a plan view showing a liquid crystal display of the present invention.

9 is a cross-sectional view taken along line III-III ′ of FIG. 8;

FIG. 10 is a cross-sectional view taken along line IV-IV ′ of FIG. 8.

* Description of symbols on the main parts of the drawings *

40: first substrate 41: gate wiring

41a: gate electrode 42: data wiring

42a: source electrode 42b: drain electrode                 

43 pixel electrode 46 gate insulating film

47: protective film 50: first column spacer

51 second column spacer 60 second substrate

61 black matrix layer 62 color filter layer

63: overcoat layer 70: liquid crystal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device. In particular, by forming column spacers on both sides of an intersection area of a gate line and a data line, a liquid crystal display device is provided such that the upper and lower substrates are not pushed when a force pushing in one direction to the liquid crystal panel. It is about.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent displays (ELD), and vacuum fluorescent (VFD) Various flat panel display devices such as displays have been studied, and some of them are already used as display devices in various devices.

Among them, LCD is the most widely used as the substitute for CRT (Cathode Ray Tube) for mobile image display device because of its excellent image quality, light weight, thinness, and low power consumption. In addition to the use of the present invention has been developed in various ways such as a television and a computer monitor for receiving and displaying broadcast signals.

In order to use such a liquid crystal display as a general screen display device in various parts, it is a matter of how high quality images such as high definition, high brightness and large area can be realized while maintaining the characteristics of light weight, thinness and low power consumption. Can be.

Hereinafter, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1 is an exploded perspective view showing a general liquid crystal display.

As shown in FIG. 1, a general liquid crystal display device includes a liquid crystal injected between a first substrate 1 and a second substrate 2 bonded to each other with a predetermined space, and between the first substrate 1 and the second substrate 2. It consists of layer (3).

In more detail, the first substrate 1 has a plurality of gate lines 4 in one direction at regular intervals to define the pixel region P, and is fixed in a direction perpendicular to the gate lines 4. A plurality of data wires 5 are arranged at intervals. In addition, a pixel electrode 6 is formed in each pixel region P, and a thin film transistor T is formed at a portion where each of the gate lines 4 and the data lines 5 intersect to form the thin film transistor. A data signal of the data line is applied to each pixel electrode in accordance with a signal of a gate line.

In addition, a black matrix layer 7 is formed on the second substrate 2 to block light in portions other than the pixel region P, and portions corresponding to the pixel regions P may be used to express color. R, G, and B color filter layers 8 are formed, and a common electrode 9 for realizing an image is formed on the color filter layers 8.

In the liquid crystal display as described above, the liquid crystal layer 3 formed between the first and second substrates 1 and 2 is oriented by an electric field formed between the pixel electrode 6 and the common electrode 9, The amount of light passing through the liquid crystal layer 3 may be adjusted according to the degree of alignment of the liquid crystal layer 3 to express an image.

On the other hand, a method of forming the liquid crystal layer 3 includes a liquid crystal injection method for injecting liquid crystals in a vacuum state after joining two substrates and a liquid crystal dropping method in which a liquid crystal is dropped on one substrate and then bonded to an opposite substrate. .

Among the liquid crystal dropping methods mainly used for a large area, when a ball spacer is used to maintain a cell gap like a liquid crystal injection method, the ball spacer is moved in the liquid crystal spreading direction when the dropped liquid crystal spreads. Since the spacers are driven to one side, accurate cell gap maintenance is impossible. Therefore, the liquid crystal dropping method should use a fixed spacer (column spacer or patterned spacer) in which the spacer is fixed to the substrate without using the ball spacer.

Hereinafter, a liquid crystal display including a column spacer in which spacers are regularly fixed will be described in detail.

The following column spacers are formed by being fixed to the color filter substrate and are in contact with the TFT substrate. The contact portion of the TFT substrate is formed by giving a predetermined height on the color filter substrate, corresponding to any single wiring of the gate wiring or the data wiring.

FIG. 2 is a plan view illustrating a conventional liquid crystal display, FIG. 3 is a structural sectional view taken along line II ′ of FIG. 2, and FIG. 4 is a structural sectional view taken along line II˜II ′ of FIG. 2.

2 to 4, the liquid crystal display according to the related art is formed by vertically crossing the gate lines 4 and the data lines 5 so as to define a pixel area. A thin film transistor TFT is formed at a portion where the data lines 5 intersect, and a pixel electrode 6 is formed in each pixel area. In addition, column spacers 20 are formed to maintain a cell gap at regular intervals.

Here, the column spacer 20 is formed at a portion corresponding to the upper side of the gate wiring 4. That is, the gate wiring 4 is formed on the first substrate 1, the gate insulating film 15 is formed on the entire surface of the substrate including the gate wiring 4, and the protective film 16 is formed on the gate insulating film 15. Is formed.

The second substrate 2 includes a black matrix layer 7 for covering non-pixel regions (gate wirings, data wirings, and thin film transistor regions) other than the pixel region, and a color filter substrate including the black matrix layer 7. A color filter layer 8 formed by corresponding R, G, and B pigments in turn on each of the pixel regions and a common electrode 14 formed on the entire surface of the second substrate 2 including the color filter layer 8 are formed on (2). Is formed.

The two substrates 1 and 2 are formed such that the column spacer 20 is formed on the common electrode 14 of the portion corresponding to the gate wiring 4 so that the column spacer 20 is positioned on the gate wiring 4. Are cemented.

As shown in FIG. 4, a portion where the black matrix layer 7 is formed is a portion corresponding to a non-pixel region of the first substrate 1, that is, the gate wiring 4, the data wiring 5, and the thin film transistor region. The portion serves as the light shielding portion, and the portion where the black matrix layer 7 is not formed (the region in which no gate wiring, data wiring, or thin film transistor is formed) functions as an opening portion.

5 is a cross-sectional view of a structure in a direction crossing a data line in a pixel of another conventional structure.

As illustrated in FIG. 5, the pixel electrode 6a on the left side is formed to be spaced apart from the data line 5, and the pixel electrode 6b on the right side is formed to be in contact with the data line 5 to form both pixels around the data line. Examine the structure of the cross section.

In FIG. 5, a gate insulating film formed on the entire surface of the first substrate 1 below the data line 5, a color filter layer, a black matrix layer 7 and a color formed on the second substrate 2 corresponding to the pixel region. The common electrode formed on the entire surface of the second substrate 2 including the filter layer is omitted.

The area A and the area B represent an opening and a light shielding part when the first and second substrates 1 and 2 are normally bonded, respectively. The division of the area is whether the black matrix layer 6 is formed.

The liquid crystal display is driven in a twisted nematic (TN) mode, normally white, and when the driving voltage is applied in a black state, the liquid crystal display device may be connected to the pixel electrodes 6a and 6b of the first substrate 1. The liquid crystal is vertically aligned along a vertical electric field formed between the common electrode (see 14 of FIG. 4) of the second substrate 2.

In this case, the liquid crystal 3 is positive in dielectric anisotropy and is aligned along the electric field direction.

At this time, a region between the pixel electrode 6a formed on the left side and the data line 5 spaced apart is formed by a transverse electric field by the voltage value applied to the pixel electrode 6a and the data line 5. The black matrix layer 7 is further formed and masked to the left by acting as a disclination line whose orientation is not controlled.

Here, the pixel electrode 6b formed on the right side is formed in contact with the data line 5 without providing a region between the electrode and the wiring, thereby preventing the foreground line formation due to the horizontal alignment. In this case, the driving voltage applied to the data line 5 and the driving voltage applied to the pixel electrode 6b are almost the same, and the alignment of the liquid crystals on the pixel electrode 6b and the data line 5 region is uniform. To have a vertical orientation.

In this case, the black matrix layer 7 includes the data lines 5 so as to partially overlap with the pixel electrodes 6a and 6b respectively formed in the pixels on both sides thereof. Due to the generation of a horizontal electric field in the area between the data lines 5, the foreground line where light leakage defects occur in a predetermined direction is covered with a predetermined margin.

Here, in the left pixel and the right pixel, the overlap area of the data line 5 is different from that of the pixel electrodes 6a and 6b on both sides adjacent to the one data line 5 at a predetermined interval or more. This is because it has a limitation that must be made. In this case, the right pixel electrode 6b is formed in contact with the data line 5 so that there is almost no portion where alignment defects of the liquid crystal appear, and the left pixel electrode 6a maintains a spaced interval between adjacent pixel electrodes. Is formed to be spaced apart from the data line 5 by a predetermined interval, and the alignment defect of the liquid crystal appears only in this portion.

6 is a cross-sectional view illustrating the upper and lower substrates skewed when the liquid crystal display is pushed in one direction, and FIG. 7 is a cross-sectional view illustrating light leakage after the liquid crystal display is pushed in one direction.

As shown in FIG. 6, when the liquid crystal display of FIG. 5 is pushed by applying a force in a predetermined direction (the upper direction from the upper side of the second substrate in FIG. 6) on the upper surface thereof, that is, the rear surface of the second substrate 2, FIG. As shown in FIG. 7, the phenomenon in which the first and second substrates 1 and 2 are staggered with each other occurs, and the second substrate 2 is moved in a direction in which a force is applied. Therefore, the part where the light shielding part (region B) and the actual black matrix layer 7 are formed in a normal bonding state before receiving a force is different, and the area of the B region which is not covered by the black matrix layer 7 is When the liquid crystal display is viewed from a predetermined direction, a foreground line in which alignment defects are generated is exposed, thereby causing light leakage.

As described above, the liquid crystal display manufactured by the dropping method in which the column spacer is formed has the following problems.

In the conventional liquid crystal display device having a column spacer, the upper and lower substrates are simply aligned and bonded to each other. There is almost no bonding force between the upper and lower substrates.                         

Therefore, when a force of sweeping down in a predetermined direction from the surface of the liquid crystal panel is applied (when touched), a phenomenon occurs in which the upper substrate is shifted in the sweeping direction, and it takes time to recover to the original state, and the difference between the lower substrates The black matrix layer, which is precisely aligned to the miner and corresponding to the black matrix layer, is shifted together with the shifting of the upper substrate. The leakage of light is observed at a predetermined viewing angle.

When the conventional pressing light leakage is observed about 1% was a major factor to degrade the quality.

The present invention has been made to solve the above problems by forming column spacers on both sides of the intersection area of the gate wiring and the data wiring, so that the upper and lower substrates are not pushed when the liquid crystal panel is pushed in one direction. There is a purpose to provide a liquid crystal display device.

According to an aspect of the present invention, there is provided a liquid crystal display device including: a first substrate on which a TFT array including a gate wiring and a data wiring intersecting with each other; a second substrate on which a color filter array is formed corresponding to the TFT array; And a liquid crystal layer filled between the first and second column spacers formed on the second substrate and corresponding to the gate lines on both sides of the intersection of the gate wiring and the data wiring. It has its features.                     

The first and second column spacers are formed on the second substrate.

A semiconductor layer is further formed below the data line at the intersection of the lines.

The TFT array includes a gate wiring and a data wiring crossing each other on the first substrate to define a pixel region, a thin film transistor formed between the gate wiring and the data wiring, and a pixel electrode formed in the pixel region. The color filter array includes a black matrix layer formed on a region other than the pixel region on the second substrate, a color filter layer formed corresponding to the pixel region, and a common surface formed on the entire surface of the second substrate including the black matrix layer and the color filter layer. It comprises an electrode.

Alternatively, the TFT array may include gate wiring and data wiring crossing each other on the first substrate to define a pixel region, a thin film transistor formed between the gate wiring and the data wiring, and a common electrode alternately formed in the pixel region. And a pixel electrode, wherein the color filter array includes a black matrix layer formed on a region other than the pixel region on the second substrate, a color filter layer formed corresponding to the pixel region, and the black matrix layer and the color filter layer. It comprises a overcoat layer formed on the front surface of the second substrate including a.

In addition, the liquid crystal display device of the present invention for achieving the same object is a first substrate and a second substrate facing each other, a gate wiring formed on the first substrate including a gate electrode, and a first including the gate wiring A gate insulating film formed on the substrate, a semiconductor layer formed on the gate insulating film so as to cover the gate electrode, and source / drain electrodes on both sides of the gate electrode, the data wiring formed in a direction crossing the gate wiring; A protective film formed on the gate insulating film including the semiconductor layer and the data wiring, a pixel electrode formed on the protective film through the drain electrode and the protective film hole, a black matrix layer formed on a predetermined region of the second substrate; A color filter layer formed on a second substrate including the black matrix layer, and the black A common electrode formed on the entire surface of the second substrate including a matrix layer and a color filter layer, and first and second column spacers formed on the second substrate so as to correspond to gate wirings on both sides of the intersection of the gate wiring and the data wiring; Another feature is that the liquid crystal layer is filled between the second substrates.

A semiconductor layer is further formed on the gate insulating film of the gate wiring and the data wiring intersection.

In addition, the liquid crystal display device of the present invention for achieving the same object includes a first substrate and a second substrate facing each other, a gate wiring and a data wiring formed so as to cross each other on the first substrate to define a pixel region; A pixel electrode and a common electrode alternately formed in the pixel region, a semiconductor layer formed on the gate insulating film in a shape covering the gate electrode, a gate insulating film interposed between the gate wiring and the semiconductor layer, the semiconductor layer and data A protective film formed on a gate insulating film including wiring, a black matrix layer formed on a predetermined region of the second substrate, a color filter layer formed on a second substrate including the black matrix layer, and the black matrix layer and a color filter layer. The overcoat layer formed on the entire surface of the second substrate, and the gate wiring and the data wiring On both side portions in correspondence to the gate wiring yirueojim including first and second column spacer and the first and the liquid crystal filled between the second substrate layer formed on the second substrate has a further feature.

A semiconductor layer is further formed on the gate insulating film of the gate wiring and the data wiring intersection.

Hereinafter, the liquid crystal display of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 8 is a plan view illustrating a liquid crystal display of the present invention, and FIG. 9 is a cross-sectional view taken along line III-III 'of FIG. 8.

As shown in Figs. 8 and 9, the liquid crystal display device of the present invention includes a first substrate 40 having a large TFT array, a second substrate 60 having a color filter array corresponding to the TFT array, and the color. First and second column spacers 50 and 51 and the first and second layers formed on the common electrode 63, which is the uppermost layer of the filter array, to correspond to both sides of the intersection of the gate wiring 41 and the data wiring 42 of the TFT array. 1, the liquid crystal layer 70 is filled between the second substrate (40, 60).

The TFT array and the color filter array formed on the first and second substrates 40 and 60 are described in detail as follows.

The TFT array is a thin film formed between the gate wiring 41 and the data wiring 42 and the gate wiring 41 and the data wiring 42 crossing each other on the first substrate 40 to define a pixel region. And a transistor TFT and a pixel electrode 43 formed in the pixel region. Here, the pixel electrode 43b and the data line 42 partially overlap each other in the right pixel based on the data line 42, and the data line 42 and the pixel electrode 43a are spaced apart in the left pixel. .

The thin film transistor TFT may have a gate electrode 41a protruding from the gate line 41, a source electrode 42a formed protruding from the data line 42, and a predetermined distance from the source electrode 42a. The semiconductor layer 45 is formed on the lower layer of the data line 42 to cover the drain electrode 42b and the gate electrode 41a.

Here, a channel is formed in the semiconductor layer 45 corresponding to the region between the source electrode 42a and the drain electrode 42b. The source electrode 42a and the drain electrode 42b are formed at both sides of the gate electrode 41a.

On the other hand, the semiconductor layer 45 is formed by laminating an amorphous silicon layer on the lower side, and an n + layer on the upper side, the n + layer is removed from the channel portion.

In FIG. 9, a liquid crystal display device formed of four masks is illustrated. The semiconductor layer 45 is patterned with the same mask together with the metal layer forming the data line 42. At this time, in order to remove the metal layer and the n + layer constituting the data line 42 in the channel region, the semiconductor layer 45 and the data using a diffraction exposure mask or a halftone mask having a transflective portion corresponding to the corresponding region of the channel. The layer of the wiring 42 is etched to expose the amorphous silicon layer under the semiconductor layer 45. On the characteristics of these four masks (data wiring and semiconductor layer are patterned with the same mask), the semiconductor layer 45 must be formed under the data wiring 42.

On the other hand, in the case of the liquid crystal display device manufactured by five masks, the semiconductor layer 45 is formed so as to correspond to the intersection of the gate wiring 41 and the data wiring 42 in addition to the thin film transistor forming portion, so that the gate wiring 42 is formed. ) And the intersection of the data line 42 and the data line 42 are formed to have a step difference by the thickness of the data line 42 and the semiconductor layer 45 relative to the other regions of the gate line 41.

Therefore, in the case of manufacturing with 4 masks, or with 5 masks, or the liquid crystal display of the present invention, the portion of the gate wiring 41 and the data wiring 42 at the intersection of the other gate wiring 41 is compared with the portion of the other gate wiring 41. The step height is higher by the thickness of the semiconductor layer 45 and the data line 42. For example, when the semiconductor layer 45 is 2000 Å and the data line 42 is 2000 to 2500 두께 thick, the intersection of the gate line 41 and the data line 42 is the other gate line 41. It has a thickness of 4000 to 4500 mm relative to the site.

A gate insulating film 46 covering the gate wiring 41 and the gate electrode 41a is formed on an entire surface of the first substrate 40 under the semiconductor layer (see 45 of FIG. 9), and the drain electrode 42b is formed. A protective film hole (not shown) is provided in a predetermined portion above the drain electrode 42b between the layer and the interlayers of the pixel electrodes 43a and 43b so that the protective film 47 is interposed therebetween. The pixel electrodes 43a and 43b are electrically connected to the drain electrode 42b through the passivation hole.

The color filter array corresponding to the TFT array includes a black matrix layer 61 formed in a predetermined region on the second substrate 60 and each subpixel on the entire surface of the second substrate 60 including the black matrix layer 61. R, G, and B color filter layers (see 62 of FIG. 10) formed corresponding to the sub-pixels and the common electrode 63 formed on the entire surface of the second substrate 60 including the color filter layers 62.

The black matrix layer 61 is formed to partially overlap the pixel electrodes 43a and 43b from the non-pixel region (gate wiring and data wiring region, thin film transistor formation region) and the data wiring 42. This is to cover the foreground line where the liquid crystal alignment defect occurs in the region between the data line 42 and the pixel electrodes 43a and 43b.

The first and second column spacers 50 and 51 are formed on the top of the color filter array, that is, on the common electrode 63.

The first and second column spacers 50 and 51 may be connected to both sides of the gate line 41 and the data line 42 in the gate line 41 so as to correspond to both sides of the common electrode of the second substrate 60. A positive or negative photosensitive resin, an organic insulating film, or the like is applied onto the 63, and then selectively removed to form it.

As described above, the alignment materials are formed on the top surfaces of the first substrate 40 and the second substrate 60, respectively, in the TFT array process, the color filter array process, and the first and second column spacers 50 and 51. After printing, the rubbing treatment may be performed to further form the alignment layer.

In the above, an example in which the first and second column spacers 50 and 51 are formed on the second substrate 60 has been described. In some cases, the first and second column spacers 50 and 51 may be formed on the first substrate 40 in the TFT array process. It may be.

In the liquid crystal display of the present invention, the intersection of the gate line 41 and the data line 42 is relatively formed, and the semiconductor layer 45 and the data line 42 are formed more than the other gate line 41 region. Therefore, it is formed relatively higher by the thickness of the two layers. Therefore, since the first and second column spacers 50 and 51 are formed on both sides of the gate wiring 41 and the data wiring 42, the first and second columns are formed when the liquid crystal panel is pushed in a predetermined direction. The intersection of the gate wiring 41 and the data wiring 42 having a relatively high step with respect to the spacers 50 and 51 serves to prevent shifting, so that the first and second substrates 40 and 60 alternate with each other. Block the phenomenon. That is, whether a force is pushed to the left from the back surface of the second substrate 60 or pushed to the right, one column spacer of the first and second column spacers 50 and 51 is the gate wiring 41. This is because the first and second substrates 40 and 60 are not pushed by the intersecting portion of the data wiring 42 and the data wiring 42 is held in place. Therefore, the liquid crystal display of the present invention is tolerant to a touch applying a force pushing in one direction.

Hereinafter, the liquid crystal alignment when the liquid crystal display device of the present invention is pushed in one direction will be described with reference to the drawings.

FIG. 10 is a structural cross-sectional view taken along line IV-IV 'of FIG. 8.

As shown in FIG. 10, in the liquid crystal display of the present invention, even when the first and second substrates 40 and 60 are pushed in either of the left and right directions, an intersection portion of the gate line 41 and the data line 42 is defined as described above. The first column spacer 50 or the second column spacer 51 serves to prevent the phenomenon of being pushed, so that the shifting phenomenon of the first and second substrates 40 and 60 is structurally blocked. Therefore, the region where the actual black matrix layer 61 is positioned and the B region (the region where the black matrix layer corresponds to the light blocking part-normal bonding) almost match each other, so that the black matrix layer 61 is normally bonded to the foreground region. As described above, the light leakage is not generated in a predetermined direction due to the foreground exposure. In this case, the black matrix layer 61 partially overlaps the pixel electrodes 43a and 43b and has a margin for covering the foreground line generated at the edge portion of the data line 42.

The liquid crystal display of the present invention structurally blocks the shifting caused by the pressing (touch) of the intersection of the gate wiring 41 and the data wiring 42 to reduce the defect of the leakage light leakage from 1% to 0.1%. Can be.

The liquid crystal display of the twisted nematic mode has been described above. The IPS mode (In) is formed by replacing the common electrode on the second substrate with an overcoat layer and alternately forming the pixel electrode and the common electrode in the pixel area. It may also be applicable to Plane mode.

The liquid crystal display of the present invention as described above has the following effects.

By forming the color spacers corresponding to both sides of the intersection portion of the gate wiring and the data wiring of the present invention, the shifting occurs at the time of pressing, thereby fundamentally blocking.

That is, whether one of the two column spacers (dual column spacer) is pushed in the left direction or the right direction is no longer pushed due to the step of the intersection of the gate wiring and the data wiring, so that the shifting is in place As a result, light leakage defects due to the exposure of the foreground line are improved.

Therefore, the defect of light leakage when pressed can be reduced from the conventional 1% level to 0.1% level.

Claims (9)

A first substrate having a TFT array including a gate wiring and a data wiring crossing each other; A second substrate corresponding to the TFT array, wherein a color filter array is formed; First and second column spacers corresponding to both gate lines of the intersection portion of the gate line and the data line; And And a liquid crystal layer filled between the first substrate and the second substrate. The method of claim 1, And the first and second column spacers are formed on the second substrate. The method of claim 1, And a semiconductor layer is further formed below the data line at the intersection of the lines. The method of claim 1, The TFT array includes a gate wiring and a data wiring crossing each other on the first substrate to define a pixel region, a thin film transistor formed between the gate wiring and the data wiring, and a pixel electrode formed in the pixel region. , The color filter array includes a black matrix layer formed on a region other than the pixel region on the second substrate, a color filter layer formed corresponding to the pixel region, and a common surface formed on the entire surface of the second substrate including the black matrix layer and the color filter layer. Liquid crystal display comprising an electrode. The method of claim 1, The TFT array includes a gate wiring and a data wiring crossing each other on the first substrate to define a pixel region, a thin film transistor formed between the gate wiring and the data wiring, and a common electrode and a pixel alternately formed in the pixel region. Including an electrode, The color filter array may include a black matrix layer formed on an area other than the pixel area on the second substrate, a color filter layer formed corresponding to the pixel area, and an overcoat formed on an entire surface of the second substrate including the black matrix layer and the color filter layer. Liquid crystal display comprising a layer. A first substrate and a second substrate facing each other: A gate wiring formed on the first substrate including a gate electrode; A gate insulating film formed on the first substrate including the gate wiring; A semiconductor layer formed on the gate insulating film in a shape covering the gate electrode; A data line having source / drain electrodes on both sides of the gate electrode and formed in a direction crossing the gate line; A protective film formed on the gate insulating film including the semiconductor layer and the data wiring; A pixel electrode formed on the passivation layer through the drain electrode and the passivation layer hole; A black matrix layer formed on a predetermined region of the second substrate; A color filter layer formed on a second substrate including the black matrix layer; A common electrode formed on an entire surface of the second substrate including the black matrix layer and the color filter layer; First and second column spacers formed on the second substrate so as to correspond to gate wirings on both sides of the intersection of the gate wiring and the data wiring; And And a liquid crystal layer filled between the first and second substrates. The method of claim 6, And a semiconductor layer is further formed on the gate insulating film at the intersection of the gate wiring and the data wiring. A first substrate and a second substrate facing each other: Gate wiring and data wiring formed on the first substrate so as to cross each other to define a pixel region; A pixel electrode and a common electrode which are alternately formed in the pixel region; A semiconductor layer formed on the gate insulating film in a shape covering the gate electrode; A gate insulating film interposed between the gate wiring and the semiconductor layer; A protective film formed on the gate insulating film including the semiconductor layer and the data wiring; A black matrix layer formed on a predetermined region of the second substrate; A color filter layer formed on a second substrate including the black matrix layer; An overcoat layer formed on the entire surface of the second substrate including the black matrix layer and the color filter layer; First and second column spacers formed on the second substrate so as to correspond to gate wirings on both sides of the intersection of the gate wiring and the data wiring; And And a liquid crystal layer filled between the first and second substrates. The method of claim 8, And a semiconductor layer is further formed on the gate insulating film at the intersection of the gate wiring and the data wiring.

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