KR20080056830A - Liquid crystal display device and method for repairing the same - Google Patents

Abstract

An LCD(Liquid Crystal Display) device and a method for repairing the same are provided to cut a connection portion of a pixel electrode of each TFT(Thin Film Transistor), to cut a connection portion of two pixel electrodes with a pixel, and to connect each pixel electrode at the upper and lower pixels with the pixel electrode of the other pixel area. A first substrate and a second substrate are placed by facing each other. Each one has multiple pixel areas and the pixel areas have upper and lower sub-pixels. On the first substrate, gate lines are formed by passing through both upper pixel and lower pixel of each pixel area. Data lines are formed by crossing the gate lines. First and second TFTs(110,112) are located at the upper and lower portions of the cross section parts of the gate lines and the data lines and drive the upper and lower pixels. First and second pixel electrodes(120,122) are connected with the first and second TFTs and formed at the upper and lower pixels. A connection pattern(121) connects the first and second pixel electrodes within the same pixel area and is formed by the first and second pixel electrode integrally. A groove is formed at the gate line at the lower portion of the connection pattern. The first dummy pattern is overlapped with the upper pixel of the pixel area and the lower pixel of a pixel area of an adjacent pixel area. The second dummy pattern is overlapped with the lower pixel of the pixel area and the upper pixel of a pixel area of an adjacent pixel area.

Description

Liquid crystal display and repair method thereof {LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR REPAIRING THE SAME}

1 is a plan view showing a liquid crystal display device according to the prior art

2 is a circuit diagram showing a liquid crystal display device according to the present invention;

3 is an enlarged plan view of portion A of FIG.

4 is a cross-sectional view taken along the line II ′ of FIG. 3.

5 is an enlarged plan view of a portion B of FIG. 2;

FIG. 6 is a cross-sectional view taken along the line II-II ′ of FIG. 5.

7 is an enlarged plan view of a portion C of FIG. 2;

FIG. 8 is a cross-sectional view taken along the line III-III ′ of FIG. 7.

<Description of Major Symbols in Drawing>

100 substrate 110 first thin film transistor

112: second thin film transistor 120: first pixel electrode

122: second pixel electrode 121: connection pattern

130: gate line 136: data line

150: groove 160: dummy pattern

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a repair method thereof, and to a liquid crystal display device and a repair method thereof for preventing a deterioration of charging characteristics in a pixel in which a repair process is performed.

As the information society develops, the demand for display devices is increasing in various forms.In recent years, liquid crystal display (LCD), plasma display panel (PDP), electro luminescent display (ELD), and vacuum fluorescent display (VFD) have been developed. Various flat panel display devices have been studied, and some are already used as display devices in various devices.

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

In order to use the LCD as a general screen display device in various parts, development of high quality images such as high definition, high brightness, and large area is required while maintaining the characteristics of light weight, thinness, and low power consumption. can do.

Hereinafter, a liquid crystal display and a repair method thereof according to the related art will be described.

1 is a plan view showing a liquid crystal display device according to the prior art.

The liquid crystal display according to the related art has a plurality of gate lines GL in one direction at regular intervals on the first substrate, and a plurality of data lines DL at regular intervals in a direction perpendicular to the gate line GL. By being formed to intersect, the pixel area is defined. The pixel electrode 20 is formed in the pixel region, and the thin film transistor 10 is formed at a portion where the gate line GL and the data line DL cross each other. In this case, the data signal of the data line DL is transferred to each pixel electrode 20 according to the signal applied to the gate line GL. As described above, the first substrate on which the thin film transistor and the pixel electrode are formed is called a thin film transistor array substrate.

Although not shown in the drawing, the second substrate facing the first substrate includes a black matrix layer for blocking light except portions of the pixel region, an R, G, and B color filter layer for expressing color colors, and an image. The common electrode for this is formed. The second substrate on which the color filter layer is formed is called a color filter array substrate.

The thin film transistor array substrate and the color filter array substrate are bonded to each other, and a liquid crystal layer is formed therebetween. And the liquid crystal of the liquid crystal layer formed between both board | substrates is oriented by the electric field between a pixel electrode and a common electrode, and an image is displayed by adjusting the quantity of the light which permeate | transmits a liquid crystal layer according to the orientation degree.

When the thin film transistor is formed, the patterning of the source / drain electrodes is not performed normally, so that separation between the source / drain electrodes is not possible, or conductive foreign matter remains in the thin film transistor area, resulting in poor driving of the thin film transistor and disconnection. In the black state, bright spots may occur.

Next, referring to FIG. 1, a repair method in the case where a failure occurs in the thin film transistor 10 formed at a portion where the n-th gate line GLn and the data line DL intersect each other will be described.

As shown in FIG. 1, a repair method of a liquid crystal display according to the related art, first, a thin film transistor 10 formed at a portion where an n-th gate line GL _n intersects a data line DL and a pixel connected thereto. The electrode 20 is cut. At this time, the laser is irradiated to a portion where the drain electrode of the thin film transistor 10 is formed and cut.

Subsequently, the pixel electrode 20 formed in the pixel region where the n-th gate line GL _n and the data line DL intersect, and the n + 1 th gate line GL _{n +1} and the data line DL. The pixel electrode 20 formed in the pixel region of the crossing portion is welded by laser irradiation.

Therefore, the pixel electrode 20 formed in the pixel region where the n-th gate line GL _n intersects the data line DL intersects the n + 1 th gate line GL _{n +1} and the data line DL intersect. The pixel electrode 20 formed in the pixel region of the portion is electrically connected, and one thin film is formed at a portion where two pixel electrodes cross the n + 1 th gate line GL _{n +1} and the data line DL. It is driven by the transistor 10.

However, this increases the amount of charge that one thin film transistor needs to charge for a unit time, thereby causing a problem of deterioration in charging characteristics. Therefore, in the case of the repair process, the luminance is lower than that of other pixels.

In the case of the large panel, since the size of one pixel area is larger than that of the small panel, the liquid crystal capacitance of the unit pixel becomes larger, which in turn has a greater influence on the above-mentioned problem of deterioration of charging characteristics.

The present invention has been made to solve the above problems, and an object thereof is to provide a liquid crystal display device and a repair method thereof for preventing the charging property from deteriorating in the pixel where the repair process is performed.

The liquid crystal display according to the present invention according to the above object defines a plurality of pixel regions each having an upper and lower sub-pixels, and each of the first and second substrates and the first substrate disposed to face each other, A gate line formed across the upper and lower pixels of the pixel region, a data line formed to intersect the gate line, and a first driving unit of the upper and lower pixels above and below an intersection of the gate lines and the data lines, respectively; A first pixel electrode and a second pixel electrode connected to a thin film transistor and a second thin film transistor, the first and second thin film transistors respectively formed in the upper pixel and the lower pixel, the first pixel electrode and the first pixel in the same pixel region. A connection pattern connected to the two pixel electrodes and integrally formed thereon; a groove formed in the gate line below the connection pattern; A first dummy pattern formed to overlap the upper pixel of the pixel area and a lower pixel of the pixel area adjacent thereto, a second dummy pattern formed to overlap the lower pixel of the pixel area and the upper pixel of the pixel area adjacent thereto, and a first substrate And a liquid crystal layer formed between the second substrate and the second substrate.

The repairing method of the liquid crystal display device according to the present invention according to the above object is, in the repair method of the liquid crystal display device, the first and second pixel electrodes of the pixel region where the bright point is generated, respectively, Cutting a connection portion of the second thin film transistor, cutting a connection pattern connecting the first pixel electrode and the second pixel electrode of the pixel region where the bright spot is generated, and the first pixel of the pixel region where the bright spot is generated Electrically connecting an electrode and a second pixel electrode of another pixel region adjacent thereto, and electrically connecting a second pixel electrode of the pixel region where the bright spot is generated and a first pixel electrode of the other pixel region adjacent thereto; It is characterized by including the.

When a single pixel area is driven by using two or more thin film transistors in a large panel and a bright point occurs in a specific pixel area, the adjacent pixel area and the defective pixel area are electrically connected and repaired. In this case, one pixel region is driven by at least two thin film transistors to secure the liquid crystal capacitance, but the repaired pixel region is responsible for twice the liquid crystal capacitance, so that the deterioration in charging characteristics is severe.

The liquid crystal display of the present invention reduces the amount of liquid crystal capacitance of the repaired pixel region by repairing up and down the pixel region in which the defect occurs in such a large panel, thereby preventing deterioration of charging characteristics in the repaired pixel region. can do.

Hereinafter, a liquid crystal display and a repair method thereof according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram illustrating a liquid crystal display according to the present invention, FIG. 3 is an enlarged plan view of a portion A of FIG. 2, FIG. 4 is a cross-sectional view taken along the line II ′ of FIG. 3, and FIG. 2 is an enlarged plan view of part B of FIG. 2, and FIG. 6 is a cross-sectional view taken along the line II-II ′ of FIG. 5. 7 is an enlarged plan view of portion C of FIG. 2, and FIG. 8 is a cross-sectional view taken along line III-III ′ of FIG. 7.

As shown in FIG. 2, the liquid crystal display according to the present invention defines a plurality of pixel regions P having upper and lower subpixels, respectively, and includes a first substrate and a second substrate disposed opposite to each other (not shown). ), A gate line GL formed across the upper and lower pixels of each pixel region P on the first substrate, a data line DL formed to intersect the gate line GL, A first thin film transistor 110 and a second thin film transistor 112 for driving an upper pixel and a lower pixel above and below an intersection of each gate line GL and data line DL, and first and second thin film transistors, respectively. The first pixel electrode 120 and the first pixel electrode 120 and the second pixel electrode 122, which are connected to the first and second pixels 110 and 112, respectively, are formed in the same pixel area P. And a connection pattern connected to the second pixel electrode 122 and formed integrally therewith. 121, the groove formed in the gate line GL under the connection pattern 121, and the upper pixel of the pixel region P and the lower pixel of the pixel region P adjacent thereto. The dummy pattern (160 of FIG. 7) is formed.

In the exemplary embodiment of the present invention, as described above, a plurality of gate lines GL and a plurality of data lines DL are formed on the first substrate, and the gate lines GL are formed on upper and lower portions of each pixel area. The pixels pass through each other and two thin film transistors are formed at each intersection to control each upper pixel and the lower pixel of one pixel area. This is because the size of one pixel area is increased as the liquid crystal display device becomes larger and larger, and thus the capacitance of the unit pixel area is also increased, and it is difficult to sufficiently charge one pixel area for one time with one thin film transistor. Accordingly, one pixel region is charged using two thin film transistors.

In FIG. 2, the intersections of the n-th data line DL, the n-th gate line GL _{n -1} , the n-th gate line GL _n , and the n + 1 th gate line GL _{n +1} An n-1 th pixel region P _{n -1} , an n th pixel region P _n , and an n + 1 th pixel region P _{n +1} each of an upper pixel and a lower pixel are illustrated.

In FIG. 3, part A of FIG. 2 is enlarged, and in FIG. 4, a cross-sectional view taken along line II ′ is illustrated. This will be described in more detail with respect to the first and second thin film transistors 110 and 112 formed at upper and lower portions of the n-th gate line GL _n and the n-th data line DL.

The first thin film transistor 110 is formed to intersect the gate line 130 formed in one direction on the first substrate 100, the first gate electrode 130a protruding therefrom, and the gate line 130. The data line 136 includes a first source electrode 136a protruding from the first gate electrode 130a and a first drain electrode 138a spaced apart from the first source electrode 136a. It is.

The second thin film transistor 112 is formed to intersect the gate line 130 formed in one direction on the first substrate 100, the second gate electrode 130b protruding therefrom, and the gate line 130. A second data line 136, a second source electrode 136b protruding from the second gate electrode 130b, and a second drain electrode 138b spaced apart from the second source electrode 136b. Consists of.

The first or second gate electrodes 130a and 130b, the first and second source electrodes 136a and 136b, and the first and second drain electrodes 138a and 138b may be formed on the entire surface of the first substrate 100. A passivation layer 142 made of an inorganic insulating material is formed, and first and second contact holes 140a and 140b are formed in the passivation layer 142 on the first and second drain electrodes 138a and 138b.

The first pixel electrode 120 and the second pixel electrode are connected to the first and second thin film transistors 110 and 112 through the first and second contact holes 140a and 140b, respectively. 122 is formed.

Reference numeral 132, which is not described, denotes a gate insulating film, and 134 denotes a semiconductor layer.

Next, in FIG. 5, the portion B of FIG. 2 is enlarged, and FIG. 6 is a cross-sectional view taken along the line II-II '. Accordingly, the connection portion of the first pixel electrode 120 and the second pixel electrode 122 formed in the upper pixel and the lower pixel in the n-th pixel region P _n will be described in detail.

First, the gate line 130 is formed on the first substrate 100 to cross the upper pixel and the lower pixel of the n-th pixel region P _n , and the gate insulating film is formed on the entire surface of the substrate including the gate line 130. 132 and a protective film 142 are formed. The first pixel electrode 120 and the second pixel electrode 122 are formed in each of the upper and lower pixels, and the first and second pixel electrodes 120 and 122 in the n-th pixel region P _n are formed. The connection pattern 121 is integrally formed with them so as to connect the same.

In this case, the connection pattern 121 and the gate line 130 cross each other and overlap each other. In the gate line 130 of this portion, a groove 150 larger than the width of the connection pattern 121 is formed. have. Grooves formed in the gate line 130 are formed together when the gate line 130 is patterned.

Next, in FIG. 7, the portion C of FIG. 2 is enlarged, and FIG. 8 is a cross-sectional view taken along line III-III '. Thus, adjacent portions of the upper pixel of the n th pixel region P _n and the lower pixel of the n−1 th pixel region P _{n −1} will be described in more detail.

Adjacent portions of the upper pixel of the n th pixel region P _n and the lower pixel of the n−1 th pixel region P _{n −1} are formed on the first pixel electrode formed on the upper pixel of the n th pixel region P _n . 120, the second pixel electrode 118 formed at the lower pixel of the n−1 th pixel region P _{n −1} , and the dummy pattern 160 formed at the bottom thereof so as to overlap the two pixel electrodes 118 and 120. )

In this case, a gate insulating layer 132 is interposed between the first substrate 100 and the dummy pattern 160, and a passivation layer 142 is interposed between the dummy pattern 160 and the two pixel electrodes 118 and 120. It is insulated.

Since the dummy pattern 160 is formed in the pixel area P, it may affect the reduction of the aperture ratio, and the size of the dummy pattern 160 is as small as possible.

In the above, the dummy pattern 160 may include the data lines (136 of FIG. 3), the first and second source electrodes 136a and 136b, and the first and second drains of the first and second thin film transistors 110 and 112. It is formed on the same layer of the same metal as the electrodes 138a and 138b. That is, it can be patterned at the same time using one mask.

Alternatively, the dummy pattern 160 may be made of the same metal as the gate lines (130 of FIG. 3) and the first and second gate electrodes 130a and 130b of the first and second thin film transistors 110 and 112. It may be formed in a layer.

The first substrate 100 on which the thin film transistor and the pixel electrode described above are formed is called a thin film transistor array substrate.

Although not shown in the drawing, the second substrate facing the first substrate includes a black matrix layer for blocking light except portions of the pixel region, an R, G, and B color filter layer for expressing color colors, and an image. The common electrode for this is formed. The second substrate on which the color filter layer is formed is called a color filter array substrate.

The thin film transistor array substrate and the color filter array substrate are bonded to each other, and a liquid crystal layer is formed therebetween. And the liquid crystal of the liquid crystal layer formed between both board | substrates is oriented by the electric field between a pixel electrode and a common electrode, and an image is displayed by adjusting the quantity of the light which permeate | transmits a liquid crystal layer according to the orientation degree.

As described above, the liquid crystal display device in which the pixel electrode and the common electrode are formed on different substrates and an electric field is formed between the two electrodes is called a twisted nematic mode liquid crystal display device.

In the embodiment, the present invention has been described with reference to a TN type liquid crystal display device. Alternatively, a transverse electric field (horizontal electric field) is formed between the two electrodes by alternately forming the pixel electrode and the common electrode in the pixel area on the first substrate. The present invention is also applicable to an In-Plane Switching (IPS) mode liquid crystal display device.

Next, a repair method of the liquid crystal display device according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 8.

After the first substrate on which the thin film transistor array is formed and the second substrate on which the color filter array is formed are bonded, a process of inspecting the operation of each pixel is performed before release.

At this time, a pixel that appears to be relatively bright compared to other pixel areas is determined as a bright point, and repair is performed at this area. The cause of the bright spots is that the source / drain electrodes are not patterned properly when the thin film transistor is formed, so that the source / drain electrodes cannot be separated, or conductive foreign substances remain in the thin film transistors. And the like, in the black state, bright spots may occur.

In the case where bright spots occur only in the upper pixel of the n-th pixel region P _n , the first pixel electrode 120 is cut when the connection portion of the first thin film transistor 110 and the first pixel electrode 120 is cut. Since the second pixel electrode 122 is electrically connected to each other by the connection pattern 121, the driving is performed by the second thin film transistor 112. Also, even when the bright point occurs only in the lower pixel of the n-th pixel region P _n , when the connection portion of the second thin film transistor 112 and the second pixel electrode 122 is cut, the second pixel electrode is cut. Since the 122 and the first pixel electrode 120 are electrically connected to each other by the connection pattern 121, the driving is performed by the first thin film transistor 112.

However, when bright spots occur in both the upper and lower pixels of the n-th pixel region P _n , repair cannot be performed in the same manner as described above.

Therefore, the connection portion of the first thin film transistor 110 and the first pixel electrode 120 formed in the upper pixel of the n-th pixel region P _n is cut, and the second thin film transistor 112 and n are cut. A connection pattern for cutting the connection portion of the second pixel electrode 122 formed in the lower pixel of the first pixel region P _n and connecting the first pixel electrode 120 and the second pixel electrode 122 ( Cut 121).

Following, n-th pixel area (P _n), the first pixel electrode 120 and the n-1 th pixel area (P _{n -1)} a second electrically the pixel electrode 118 to each other formed at the bottom of the pixel formed on the pixel of a first pixel electrode 124 is connected to, and formed in the n-th pixel area, the second pixel electrode 122 and the upper n + 1 pixels of the first pixel region (P _{n +1)} formed at the bottom of the pixel (P _n) by Electrical connection to each other.

After the cutting and connecting process, the first and second thin film transistors 110 and 112 formed at the intersection of the data line DL and the n-th gate line GL _n have an n-th pixel region ( It is insulated from the first and second pixel electrodes 120 and 122 formed in P _n ).

The first pixel electrode 120 formed in the n th pixel region P _n and the second pixel electrode 118 formed in the n−1 th pixel region P _{n −1} are electrically connected to each other to form a data line DL. ) And the thin film transistor formed at a portion where the n-1 th gate line GL _{n -1} crosses each other. In addition, the second pixel electrode 122 formed in the n th pixel region P _n and the first pixel electrode 124 formed in the n + 1 th pixel region P _{n +1} are electrically connected to each other. It is driven by the thin film transistor formed at the intersection of DL and the n + 1th gate line GL _{n +1} .

Next, a process of cutting the connection portions of the first and second thin film transistors 110 and the first and second pixel electrodes 120 and 122 formed in the _nth pixel region P _n with reference to FIGS. 3 and 4. Explain.

The first substrate 100 and the second substrate (not shown) are bonded to each other, and a liquid crystal layer is formed therebetween to irradiate a laser under the first substrate 100 in a state where the liquid crystal display device is completed. To cut. In this case, when the laser is irradiated from the lower portion of the first and second drain electrodes 138a and 138b connecting the first and second thin film transistors 110 and 112 to the first and second pixel electrodes 120 and 122. The first and second drain electrodes 138a and 138b are melted and cut off from each other.

The reason for irradiating the laser from the lower part of the first substrate 100 is that in the case of the second substrate, since the black matrix and the color filter layer are formed on the upper part of the first substrate 100, the laser passes through the black matrix through which light is opaque. This is because it is difficult to reach the drain electrodes 138a and 138b.

Next, a process of cutting the connection pattern 121 connecting the first pixel electrode 120 and the second pixel electrode 122 will be described with reference to FIGS. 5 and 6.

When the laser is irradiated from the lower portion of the first substrate 100 to correspond to the groove 150 of the gate line 132 formed under the connection pattern 121, the first pixel electrode 120 and the second pixel electrode 122 are disposed. The connection pattern 121 for connecting the melt is broken.

The reason why the groove 150 is formed in the gate line 132 is that when the laser is irradiated to cut the connection pattern 121 from the lower portion of the first substrate 100, the laser is blocked by the gate line 132. This is to prevent the user from reaching 121.

Next the second pixel electrode 118 is formed on the Figure 7 and the first pixel electrode 120 and the n-1 th pixel area (P _{n -1)} are formed in reference to the n-th pixel area (P _n) to Figure 8 The process of electrically connecting each other is demonstrated.

When the laser is irradiated from the lower portion of the first substrate 100 to correspond to a portion where the first pixel electrode 120 formed in the n-th pixel region P _n and the dummy pattern 160 formed thereunder overlap each other, n The first pixel electrode 120 and the dummy pattern 160 formed in the first pixel region P _n are melted and welded to each other.

The laser is applied under the first substrate 100 to correspond to a portion where the second pixel electrode 118 formed in the n−1 th pixel region P _{n −1} and the dummy pattern 160 formed thereunder overlap each other. When irradiated, the second pixel electrode 118 and the dummy pattern 160 formed in the n−1 th pixel region P _{n −1} are melted and welded to each other.

Therefore, the first pixel electrode 120 formed in the n-th pixel region P _n by the dummy pattern 160 and the second pixel electrode 118 formed in the n-1 th pixel region P _{n -1} are electrically connected to each other. Is connected.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible in the art that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the liquid crystal display and the repair method thereof according to the present invention have the following effects.

In the liquid crystal display, the charging characteristic of the pixel subjected to the repair process may be prevented from being lowered.

That is, in a liquid crystal display device in which two thin film transistors are formed up and down at a portion where a gate line and a data line cross each other, and two pixel electrodes connected to each other are formed in one pixel area, an upper pixel and a lower part of one pixel area. In the case where all the pixels appear as bright spots, the connection region of each thin film transistor and the pixel electrode is cut, and when the pixel electrode of the upper pixel or the lower pixel is repaired by connecting to the pixel electrode of another pixel region, the repaired pixel region Essau is responsible for twice the liquid crystal capacitance as before repair.

On the other hand, in the present invention, the connection portion of each thin film transistor and the pixel electrode is cut, the connection portion between two pixel electrodes in one pixel is cut, and each pixel electrode of the upper pixel and the lower pixel is connected to the pixel electrode of the other pixel region. By connecting, in the pixel region where the repair process is performed, the liquid crystal capacitance is 1.5 times higher than before the repair process, and thus the charging characteristic is prevented from being lowered as compared with the above case.

Claims (12)

A first substrate and a second substrate defining a plurality of pixel regions each having upper and lower subpixels, and disposed to face each other; A gate line formed on the first substrate to cross an upper pixel and a lower pixel of each pixel area; A data line formed to intersect the gate line; First and second thin film transistors driving the upper and lower pixels, respectively, above and below an intersection of the gate lines and the data lines; First and second pixel electrodes connected to the first and second thin film transistors and formed in the upper and lower pixels, respectively; A connection pattern connecting the first pixel electrode and the second pixel electrode in the same pixel area and integrally formed therewith; A groove formed in the gate line under the connection pattern; A first dummy pattern formed to overlap the upper pixel of the pixel area and the lower pixel of the pixel area adjacent thereto; A second dummy pattern formed to overlap the lower pixel of the pixel area and the upper pixel of the pixel area adjacent thereto; And And a liquid crystal layer formed between the first substrate and the second substrate. The method of claim 1, And a groove formed in the gate line is larger than a width of the connection pattern. The method of claim 1, And the dummy pattern is formed on the same layer as the gate line or data line. The method of claim 1, And the dummy pattern has an island shape. The method of claim 1, wherein the first thin film transistor A gate line formed in one direction on the first substrate; A first gate electrode protruding upward from the gate line; A data line formed to intersect the gate line; A first source electrode protruding from the data line to the top of the first gate electrode; And a first drain electrode formed to be spaced apart from the first source electrode. The method of claim 5, wherein the second thin film transistor, A second gate electrode protruding downward from the gate line; A second source electrode protruding from the data line to the top of the second gate electrode; And a second drain electrode formed to be spaced apart from the second source electrode. In the repair method of the liquid crystal display device of claim 1, Cutting connection portions of the first and second pixel electrodes of the pixel region where the bright point is generated and the first and second thin film transistors connected thereto; Cutting a connection pattern connecting the first pixel electrode and the second pixel electrode of the pixel region where the bright spot is generated; Electrically connecting a first pixel electrode of the pixel region where the bright spot is generated and a second pixel electrode of another pixel region adjacent thereto; And And electrically connecting the second pixel electrode of the pixel region where the bright spot is generated and the first pixel electrode of another pixel region adjacent thereto. The method of claim 7, wherein The cutting or welding process is a repair method of a liquid crystal display device, characterized in that the cutting or welding using a laser. The method of claim 8, The cutting or welding process includes repairing a laser beam from a lower portion of the first substrate. The method of claim 7, wherein Cutting the connection portions of the first and second pixel electrodes of the pixel region where the bright spot is generated and the first and second thin film transistors connected thereto, And a laser beam is cut on a lower portion of the first substrate corresponding to the first and second drain electrodes of the first and second thin film transistors. The method of claim 7, wherein Cutting the connection pattern connecting the first pixel electrode and the second pixel electrode of the pixel region where the bright spot is generated, And a laser beam is cut on the lower portion of the first substrate corresponding to the groove formed in the gate electrode under the connection pattern. The method of claim 7, wherein Electrically connecting the first pixel electrode of the pixel region where the bright spot is generated and the second pixel electrode of another pixel region adjacent thereto; The laser beam is irradiated to a portion where the first pixel electrode overlaps the first dummy pattern and a portion where the second pixel electrode and the second dummy pattern overlap each other in the adjacent pixel area, and the first and second dummy patterns The repair method of the liquid crystal display device, characterized in that electrically connected to the first and second pixel electrodes.

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