KR20010005221A - a liquid crystal display having repair lines and repairing methods thereof - Google Patents

Abstract

PURPOSE: A liquid crystal display device having a repair line is provided to effectively repair a disconnection line generated in three adjacent data lines to each other while removing non-repairable areas. CONSTITUTION: In a liquid crystal display device, the first substrate(1) for a thin film transistor substrate is provided. A plurality of gate lines(10) are formed on the first substrate. A plurality of gate pads are formed in one side end of the gate lines. A PCB substrate(3) for gate is located in the outside of the first substrate and is connected to the gate pads. A PCB substrate(4) for data is located in the outside of the first substrate and is connected to the data pads. The first to third repair lines are formed parallel to each other along the first edge formed with the data pad of the first substrate, the second edge being opposite to the first edge and the third edge being opposite to the gate pad. The first to third repair lines are formed through the PCB substrate for gate on the PCB substrate for data. A connection element connects the upper side end of the first and third repair lines being formed in the first edge of the first substrate, and the part of the first to third repair lines being formed in the PCB substrate for data.

Description

Liquid crystal display having repair lines and a repair method thereof

The present invention relates to a liquid crystal display device having a repair line and a repair method thereof.

In general, a liquid crystal display device includes a thin film transistor substrate, a color filter substrate corresponding to face the thin film transistor substrate, and a liquid crystal layer injected between the two substrates, and is supplied from an external signal source such as a printed circuit board (PCB) substrate. The display is implemented by controlling the voltage applied to the liquid crystal layer by converting the electrical signal.

The thin film transistor substrate of the liquid crystal display device is formed such that a plurality of gate lines and data lines cross each other, and a plurality of pixels, in which the gate lines and the data lines cross each other, is formed with a thin film transistor and a pixel electrode. The areas where the pixels are collected form a display area for displaying an image of the display device, and gate pads and data pads are formed near edges of the substrate where the end of the gate line and the end of the data line are located, that is, outside the display area. The part which becomes is a pad area.

A color filter and a common electrode are formed on the color filter substrate facing the thin film transistor substrate, and are smaller in size than the thin film transistor substrate. Therefore, after assembling the two substrates, the pad area where the gate pad and the data pad are formed is exposed.

On the upper side and the left side of the liquid crystal display consisting of two substrates, a data PCB board and a gate PCB board are provided, from which electrical signals are transmitted from the outside. Each PCB board converts electrical signals into data signals and scan signals, respectively. It is connected to the thin film transistor substrate by a tape automated bonding IC (TAB-IC) in which a driving IC (integrated circuit) that outputs to a pad and wiring is mounted.

In the manufacturing process of the thin film transistor liquid crystal display device, there may be various reasons for the failure to reduce the process yield, but the disconnection defect of the data wiring connected from the output terminal of the data driving IC to the source terminal of each thin film transistor is yielded. In addition to being a major cause of this, repairs are expensive.

Next, a conventional liquid crystal display and a repair method thereof will be described in detail with reference to the accompanying drawings.

1 and 2 are plan views illustrating a repair line structure of a liquid crystal display according to the related art.

First, as illustrated in FIG. 1, a plurality of gate lines 10 are formed on one surface of the lower insulating substrate 1 in a horizontal direction, and gate pads (not shown) are respectively provided at left ends of the gate lines 10. ) Is formed. At this time, several gate pads are gathered in group units to form a plurality of gate pad parts 11.

In addition, a plurality of data lines 20 are formed in the vertical direction, and are insulated from the gate lines 10. Data pads (not shown) are formed at the upper ends of the data lines 20, and several of these data pads are grouped together to form a plurality of data pad portions 21. FIG.

As such, a portion where a plurality of pixels formed by crossing the gate line 10 and the data line 20 gather to display an image becomes a display area (D / A), and the display area (D / A) The outer portion, that is, the portion where the gate pad portion 11, the data pad portion 21, and the like are formed becomes a pad region.

A gate PCB board 3 and a data PCB board 4 correspond to the left outer and upper outer parts of the lower insulating board 1, that is, the outer side of the pad area, respectively, and the gate PCB board 3 ) And the data PCB substrate 4 are formed by the gate pad portion 11 and the data pad portion (TAB-IC 60) having a driving IC 70 and a lead wire (not shown) connected thereto. 21) is electrically connected. Here, the gate and data TAB-ICs 60 correspond to each of the pad portions 11 and 21 one by one.

Ring-shaped triple repair lines 31, 32 and 33 are formed outside the display area D / A along the upper, right and lower edges of the lower insulating substrate 1, and are connected at the left side. It extends toward the PCB substrate 3 for wiring through a flexible printed circuit (FPC) film or a connector 80 provided with wiring. These triple repair lines 31, 32, 33 overlap the upper and lower ends of the data line 20. FIG.

The upper insulating substrate 2 corresponds to face the lower insulating substrate 1. At this time, the upper insulating substrate 2 corresponds to the gate pad portion 11 and the data pad portion 21 to be exposed, and the repair lines 31, 32, 33 placed on the upper, lower, and right sides of the substrate 1 and It overlaps with the display area D / A.

In such a conventional liquid crystal display device, a method of repairing a disconnected data line using a repair line is as follows.

When a disconnection occurs at a point a of the data line 20, first, a point at which the disconnected data line 20 intersects the repair line 31 of one of the triple repair lines L _a1 and L _a2 . And short circuit using a laser on the upper side and the lower side, respectively, and then cut the repair line 31 at one outer point (S _a1 , S _a2 ) at the point where the laser short is prevented so that the load capacity does not occur in an unnecessary portion. At this time, the side which can take the length of the repair line 31 short among the right side and the left side is cut | disconnected.

As a result, a data signal is transmitted to the disconnection point a of the data line 20 with the data line 20 as the path p ₁ , and the repair line 31 and the data line (across the disconnection point a). A data signal is transmitted with part of the path 20 as the path p ₂ .

On the other hand, when disconnection b occurs in the data line 20 other than the repaired data line, one of the remaining two repair lines 33 is selected to repair the data line 20 in the same manner as in the previous repair method. . That is, the upper and lower two points L _b1 and L _b2 where the data line 20 overlaps the repair line 33 are short-circuited using a laser, and at each point S _b1 and S _b2 outside the short-circuit point. The repair line 33 is cut, and the data line is transmitted to the disconnection point b of the data line 20 with the data line 20 as the path p ₃ , and the repair line crosses the disconnection point b. A data signal is transmitted by using a portion 33 and a portion of the data line 20 as a path p ₄ .

However, in the conventional liquid crystal display device having such a repair line structure, when disconnection of the data line occurs in three or more places, the disconnection occurring in the remaining points except for three places cannot be repaired. In addition, since the total load due to the resistance of the repair line itself and the capacitance generated at the portion where the data line and the repair line overlap and the capacitance generated between the repair line and the transparent electrode of the upper substrate vary greatly depending on the disconnection position of the data line, Non-repairable areas occur on the substrate. This difference in load also leads to a failure such as showing a difference in contrast between different shades on the same substrate after repair. This phenomenon becomes more serious as the liquid crystal display becomes larger and more fixed.

The conventional technique shown in FIG. 2 shows a repair ship structure which can be repaired even when the data line is disconnected at three or more places.

As described with reference to FIG. 1, the gate line 10, the gate pad part 11, the data line 20, the data pad part 21, and the like are formed.

2, the first repair line 33 is formed such that the repair line 30 intersects the data line 20 on the side of the data pad portion 21 formed in groups. A double repair line 34 extends from both ends of the first repair line 33 toward the data PCB board 4, along the data PCB board 4 and the gate PCB board 3. It is formed on the upper side and the left side. Between the thin film transistor substrate 1 and the data PCB substrate 4 separated from each other, and the data PCB substrate 4 and the gate PCB substrate 3, the data PCB substrate 4 and the data pad portion ( Dummy connection wiring (not shown) formed in the TAB-IC (60) for electrically connecting the 21) and the FPC film or connector (80) for connecting the data PCB board 4 and the gate PCB board 3 with each other. The connection wiring (not shown) formed in the above-mentioned figure serves as a path of the second repair line 34. The third repair line 35 extends from the second repair line 34 to the lower side of the thin film transistor substrate 1, and intersects with the end of the data line 20 on the opposite side of the data pad portion 21. . As in the previous case, the connection wiring formed in the FPC film or the connector 80 connecting the two substrates 3 and 1 between the gate PCB substrate 3 and the thin film transistor substrate 1 separated from each other (not shown). (Not shown) is the path of the third repair ship 36.

Repair lines 30 having such a structure are formed one by one for the data pad unit 21 and are separated from each other by group.

As described above, since the repair lines 30 are formed in groups of the data pad portions 21 and are separated from each other, even if the disconnection position of the data lines 20 changes, the load capacity is almost different depending on the position of the substrate. Do not. In addition, since the repair line 30 does not overlap all of the data lines 20 and extends out toward the data PCB board 4, the repair line 30 overlaps with the electrodes of the data line 20 and the upper substrate. It can minimize the generated capacity. In addition, there is no need to cut the repair line separately.

However, since the number of strands of the repair line 30 is large, there is a disadvantage in that it occupies a substantial portion of the lower substrate 1 and the PCB substrates 3 and 4. In addition, since the repair line 30 is exposed to the outside, metal corrosion, damage by static electricity, scratches, and the like may occur. This repair line structure can be repaired for several data lines as compared to the structure shown in FIG. 1, but when three or more data line breaks occur in one group, disconnection occurs at the remaining points except three points. There is a limit that cannot be repaired.

An object of the present invention is to effectively repair a disconnection occurring in three adjacent data lines and to remove an area that cannot be repaired.

Another object of the present invention is to minimize the area occupied by the repair ship.

Another object of the present invention is to minimize the load capacity generated in the repair line and the data line.

Another object of the present invention is to efficiently repair the disconnected data line without increasing the process.

1 and 2 are plan views illustrating a repair line structure of a liquid crystal display according to the related art.

3 is a plan view illustrating a repair line structure of a liquid crystal display according to an exemplary embodiment of the present invention.

4 is a plan view illustrating a first method of repairing data line disconnection using a repair line according to an embodiment of the present invention;

FIG. 5 is a plan view illustrating a second method of repairing disconnection of a data line using a repair line and a secondary repair line according to an exemplary embodiment of the present invention.

// The liquid crystal display according to the present invention is a triple repair line formed along the upper side, the right side and the lower side of the thin film transistor substrate, the gate PCB substrate and the data PCB substrate, the upper side of the membrane transistor substrate and the data PCB substrate. It includes a connecting part connecting the repair lines of 3, so that the disconnection of three adjacent data lines can be repaired using triple repair lines, and since the repair lines extend toward the data PCB board and the gate PCB board, Data lines overlapping with the repair line can be minimized to prevent an increase in load capacity.

Here, a double sub repair line may be provided for each data pad group divided into a plurality of data lines. The double sub repair line overlaps the triple repair line located on the upper side of the thin film transistor and overlaps the data PCB board. It is preferable to be connected to any two repair ships different from the triple repair ship located at.

In the repairing method of the liquid crystal display device according to the present invention, which repairs disconnection of data lines using repair lines and sub repair lines having such a structure, the faults occurring in three adjacent data lines are repaired using triple repair lines, respectively. . In this case, since the repair ship has a ring shape by the connection part, the repair can be performed in the same manner as the repair using a general ring repair ship.

If the disconnection of the data line occurs at a location far from the gate PCB board, repair the data signal by using the secondary repair line adjacent to the disconnected data line to bypass the data signal path toward the data PCB board and the gate PCB board. can do. Therefore, an increase in the PCB substrate load capacity can be prevented.

In the case of using the secondary repair line, the laser short circuit and cutting process are relatively increased. The repair process using only the repair line is mainly used, and the process is increased by only using the disconnection that occurs far away from the PCB substrate for the gate. You can prevent it.

As described above, since the sub repair line is selectively used, the area occupied by the repair line in the PCB board and the like can be reduced as compared with the case of forming a dedicated repair line in each group unit.

Then, the liquid crystal display device having a repair line structure and a repair method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings so that a person skilled in the art can easily carry out the present invention. Explain.

3 is a plan view illustrating a liquid crystal display having a repair line according to an exemplary embodiment of the present invention.

The liquid crystal display according to the exemplary embodiment of the present invention is almost the same as the conventional liquid crystal display shown in FIGS. 1 and 2 except for the repair line structure.

That is, as shown in FIG. 3, a plurality of gate lines 10 are formed in the horizontal direction in the insulating substrate 1, and gate pads (not shown) are formed at left ends of the gate lines 10, respectively. have. Here, several gate pads are grouped together to form a plurality of gate pad portions 11. A plurality of data lines 20 are insulated from the gate lines 10 in the vertical direction, and gate pads (not shown) are formed at upper ends of the data lines 20. Several of these gate pads are gathered in a group unit to form a plurality of data pad portions 21. As such, a portion in which a plurality of pixels formed by crossing the gate line 10 and the data line 20 gather to display an image becomes a display area D / A, and an outer portion of the display area D / A, That is, the portion where the gate pad 11 and the data pad 21 and the like are formed becomes a pad region. A gate PCB board 3 and a data PCB board 4 correspond to the left outer and upper outer parts of the lower insulating substrate 1, that is, the outer side of the pad area, respectively. 4) and the thin film transistor substrate 1 are connected by a TAB-IC 60 equipped with a gate and a day driving IC 70. Here, the gate and data driver IC 70 is electrically connected to the gate and data pad units 11 and 21, respectively.

Meanwhile, the repair lines 310, 320, 330, 340, and 350 of the liquid crystal display according to the exemplary embodiment of the present invention may include first to third repair lines 311, 321, 331, 341, 351; 312, 322, and 332. , 342, 352; 313, 323, 333, 343, and 353, which are formed in three layers, and the upper and lower portions of the lower insulating substrate 1 outside and outside the display area D / A, and the PCB substrate 3 for the gate. And on the PCB 4 for data.

That is, the first to third repair lines 311, 321, 331, 341, 351; 312, 322, 332, 342, 352; 313, 323, 333, 343, and 353 are along the upper edge of the substrate 1. The right repair line 321 connected to the upper repair lines 311, 312 and 313 and the upper repair lines 311, 312 and 313 that intersect the data line 20 and formed along the right edge of the substrate 1. Lower repair lines 331, 332 and 333, which are connected to the right repair lines 321, 322 and 323, and formed along the lower edge of the substrate 1, lower repair lines 331 and 332. , 333, and extending from the first diesel repair ships 341, 342 and 343 and the first diesel repair ships 341, 342 and 343 passing through the gate PCB board 3. It consists of the 2nd light oil repair lines 351, 352, and 353 formed in the board | substrate 4. As shown in FIG. Here, formed on the FPC film or connector 80 between the thin film transistor substrate 1 and the gate PCB substrate 3, which are separated from each other, and between the gate PCB substrate 3 and the data PCB substrate 4. Connecting wires (not shown) are provided on the lower repair lines 331, 332, and 333, the first light repair lines 341, 342, and 343, and the first light repair lines 341, 342, and 343 and the second. It becomes the connection part of the diesel repair ships 351, 352, and 353. Left ends of the first light repair lines 341, 342, 343, the second light repair lines 351, 352, 353, and the upper repair lines 311, 312, 313 extending toward the data PCB board 4. And a connecting member 40 such as a switch or a jumper for electrically connecting the second diesel oil repair lines 351, 352, and 353 to each other. In addition, an operational amplifier or the like may be provided between the first diesel service repair lines 341, 342, and 343 and the second diesel service repair lines 351, 352, and 353 to prevent the magnitude of a transmitted signal from being reduced. .

On the other hand, the sub repair lines 361, 362, 363 are formed between the second light oil repair lines 351, 352, 353 and the upper repair lines 311, 312, 313 in the vertical direction. Two secondary repair lines 361, 362, and 363 are formed in the data pad unit 21 group unit, and the dummy connection wires formed in the TAB-IC 60 arranged in the data pad unit 21 group unit. It extends toward the data PCB board 4 via a path (not shown) and overlaps with the first triple repair lines 311, 312, and 313 simultaneously. In addition, two sub repair lines 361, 362; 362, 363; 361, 363 arranged for each group on the data PCB board 4 side of the triple second diesel repair lines 351, 352, 353. It is electrically connected to any two of them.

As described above, in the liquid crystal display according to the exemplary embodiment of the present invention, the repair lines are not divided into groups of the data pad unit, and the triple repair lines that can be shared by all the data lines are arranged on the upper and lower sides and the right edges of the boards, and the PCB boards 3 and 4. ) And two sub repair lines in the vertical direction between the repair line of the data PCB board and the upper repair line of the thin film transistor board, for each group of data lines, so that three consecutive data within a group of data lines The disconnection defect of the line can be repaired, and not only the pixel defect caused by the RGB defect can be repaired, but also the area occupied by the entire repair line in the liquid crystal display device can be reduced.

On the other hand, in such a liquid crystal display device according to the present invention, repair lines such as laser short circuit and cutting are not increased, and repair lines and sub repair lines are installed so that the resistance and load capacity of the repair line itself are not greatly increased after repair. It can be repaired optionally. This will be described with reference to FIGS. 4 and 5.

First, when a disconnection occurs in a data line relatively close to the right edge of a gate PCB substrate or a thin film transistor substrate, the disconnected data line is repaired by a method similar to the case of using a conventional ring-shaped repair line. This will be described in detail with reference to FIG. 4.

4 is a plan view illustrating a method of repairing disconnection of a data line using a repair line according to an exemplary embodiment of the present invention.

As shown in FIG. 4, when a disconnection occurs at a first point c of any data line 20 within a group of data lines 20 located relatively close to the gate PCB substrate 3, the first to second points c. Data line in which the upper repair line 311 and the lower repair line 331 of any one repair line 311, 321, 331, 341, 351 (in this embodiment, the first repair line) are disconnected. Laser-short-circuit the points L _c1 and L _c2 that overlap with (20), respectively. Next, the upper and lower sleeve lines 311 and 331 are cut at the left points S _c1 and S _c2 of the shorted point. In this way, the data signal applied through the data pad is transmitted through the data line 20 to the disconnection point c, and the upper repair line 311 and the connecting portion 40 of the first repair line across the disconnection point c. ), And the second and first diesel service ships 351 and 341 of the first repair ship, the lower repair ship 331 and the data line 20 of the first repair ship are bypassed and transmitted.

On the other hand, when disconnection occurs at the second and third points d and e of the other two data lines 20 in the data line 20 group, the remaining second and third repair lines 312, 322, 332, and 342 352, 313, 323, 333, 343, and 353 are used to repair the disconnection of the two data lines 20 in the same manner as described above. That is, after laser-shorting the points (L _d1 , L _d2 ) where the data line 20 having a disconnection at the second point overlaps the upper repair line 312 and the lower repair line 332 of the second repair line, respectively. , The upper and lower repair lines 312 and 332 are cut at the right points S _d1 and S _d2 , respectively. In addition, after the data line 20 having a disconnection at the third point short-circuits the points L _e1 and L _e2 overlapping the upper repair line 313 and the lower repair line 333 of the third repair line with a laser, The upper and lower repair lines 313 and 333 are cut at the right points S _e1 and S _{e2 of the} shorting point. As a result, the connection part 40 and the second light repair lines 352 and 353 of the connecting portion 40 and the second and third repair ships from the laser short points L _d1 and L _{e1 of} the upper repair lines 312 and 313 of the second and third repair ships. ), The first diesel repair ships 342 and 343 of the second and third repair ships, and the lower repair ships 332 and 333 of the second and third repair ships as the disconnection points of the data line 20. Data signals are delivered across the second and third points, respectively.

In addition, when the fourth point f of any data line 20 in the group of data lines 20 adjacent to the right edge of the substrate 1 is disconnected, the data lines 20 are first to third. Laser short-circuits (L _f1 , L _f2 ) overlapping with the upper and lower repair lines 311, 331 of any repair line 311, 321, 331, 341, 351 of the repair line, and the left side of the laser short-circuit point. By cutting the outer points S _f1 and S _f2 , the data signal is transmitted across the disconnected fourth point f via the right repair line 312 of the first repair line as a path. Although not shown, disconnection defects of the two data lines 20 may be further repaired in such a manner that the right repair lines 322 and 332 of the remaining second and third repair ships become the transmission paths of the data signals.

The method as described above is used when the data line 20 located relatively close to the left and right edges of the substrate 1 is disconnected, so that the length of the repair line serving as the path of the data line is relatively short. Therefore, after the repair is completed, the load capacity due to the repair ship's own resistance and the overlap of the repair ship and the data line does not increase so much. In addition, since only two laser shorting processes and two cutting processes are performed for one data line disconnection, the repair process does not increase as compared with the prior art.

Next, a method of repairing disconnection of the data line 20 generated at a position far from the gate PCB substrate 3 will be described with reference to FIG. 5.

5 is a plan view illustrating a method of repairing disconnection of a data line using a repair line and a sub repair line according to an exemplary embodiment of the present invention.

As shown in FIG. 5, when disconnection occurs at a fifth point g of any data line in the group of data lines 20 located far from the gate PCB substrate 3, the disconnected data line 20 is first to first. In any one of the third repair ships, in FIG. 5, a point L _g1 overlapping the upper repair ship 312 of the second repair ship 320 is short-circuited using a laser, and adjacent sub repair ships 361, 363) shorts the point L _g3 at which one of the 363 and the upper repair line 312 of the second repair line overlaps with a laser, and then outside the two short points L _g1 and L _g3 . Upper repair line 312 of the second repair ship at the right outer point S _g3 of one shorting point L _g3 located on the right and the left outer point S _g1 of the other shorting point L _g1 located on the left Cut) Next, a short-circuit point L _g2 at which the lower repair line 333 of the third repair line electrically connected to the sub repair line 363 subjected to the laser short circuit overlaps the disconnected data line 20 using a laser. The lower repair line 333 of the third repair line is cut at the right outer point S _g2 of the short circuit point L _g2 . As a result, the upper repair line 312 of the second repair ship, the sub repair ship 363, the second light repair ship 353 of the third repair ship and the first diesel repair are located across the fifth point g, which is a data break point. The data signal is transmitted via the line 343 and the lower repair line 333 of the third repair ship as a path.

Although not shown, when another disconnection occurs in the data line 20, the remaining repair line and the sub repair line 361 and 362 which are not used for repair are appropriately repaired in the same manner as described above.

As described above, the disconnection generated at a position far away from the gate PCB board 3 is formed by using the sub repair lines 361, 362, 363 formed by group of data lines and extending out toward the data PCB board 4. Since repair is performed, an increase in the load capacity between the repair line and the data line can be prevented. However, the laser short circuit process and the cutting process required for repair are three times each. This can be solved by adopting the method described above with reference to FIG. 4 as a main repair method and adopting the method described with reference to FIG. 5 as a minor repair method.

As described above, in the liquid crystal display device having the repair line structure and the repair method according to the present invention, triple repair lines that can be shared by all data lines are formed along the upper and lower sides and the right edge of the board, and the PCB board, By fixing two sub repair lines in the vertical direction between the repair line of the data PCB board and the upper repair line of the thin film transistor board, each group of data lines repairs the disconnection defect of three consecutive data lines in one data line group. It can reduce the area occupied by the entire repair line. In addition, repairs are made by selectively using a repair ship and a secondary repair ship according to circumstances, thereby preventing an increase in repair processes such as laser short circuit and cutting, and increasing the resistance and load capacity of the repair ship itself after the repair is performed. It is effective to prevent it.

Claims (9)

A first substrate for a thin film transistor substrate, A plurality of gate lines formed on the first substrate, A plurality of gate pads each formed at one end of the gate line, the plurality of gate pads forming a plurality of gate pad groups; A plurality of data lines intersecting the gate lines, A plurality of data pads connected to one end of the data line, the plurality of data pads forming a plurality of data pad groups; A gate PCB substrate located outside the first substrate and connected to the gate pad; Located on the outside of the first substrate, the data PCB substrate connected to the data pad, A first side edge on which the data pad of the first substrate is formed and a second side edge opposite thereto, and a third side edge opposite to the gate pad, formed parallel to each other, First to third repair lines formed to reach the data PCB substrate via A connection for electrically connecting the upper end portions of the first to third repair lines formed on the first side edges of the first substrate and the first to third repair lines formed on the data PCB substrate. absence Liquid crystal display comprising a. In claim 1, Any two repairs which are formed in the data pad group as a unit and overlap a portion of an upper portion of the first to third repair lines formed at the first side edge and are different from the first to third repair lines. And first and second sub repair lines respectively connected to a line and the data PCB substrate. In claim 1, And the connection member is formed of a switch or a jumper. In claim 1, And an op amp installed between the data PCB substrate and the first to third repair lines formed on the gate PCB substrate. A plurality of gate lines formed on a first substrate for a thin film transistor substrate, a plurality of gate pads respectively formed at one end of the gate line, a plurality of data lines intersecting the gate line, and connected to one end of the data line And a plurality of data pads forming a plurality of groups in a plurality of units, located outside the first substrate, located on the outside of the first substrate, a PCB substrate for the gate connected to the gate pad, A data PCB substrate connected to the data pad, a first side edge where the data pad of the first substrate is formed, a second side edge opposite thereto, and a third side edge opposite the gate pad; Is formed in parallel, the data PCB device via the gate PCB substrate First to third repair lines formed to reach a plate, and upper end portions of the first to third repair lines formed on the first side edges of the first substrate and on the data PCB substrate Forming a connection portion for electrically connecting the first to third repair line portions, Shorting a first and second point at which a first data line in the group where the disconnection has occurred crosses one of the first to third repair lines with the first side and the second side, and And cutting the repair line short-circuited with the first data line on the right side of the first and second points, respectively. In claim 5, When a second data line belonging to the same group as the first data line is shorted, Shorting at the first side and the second side a third and a fourth point at which the second data line intersects one of the first to third repair lines that is not shorted with the first data line; and 2. The repairing method of a liquid crystal display device further comprising cutting a repair line shorted to a data line at a right side of the third and fourth points. In claim 6, When a third data line belonging to the same group as the first and second data lines is shorted, Shorting at the first side and the second side a fifth and a sixth point at which the third data line intersects the rest of the first to third repair lines that are not shorted with the first and second data lines; And cutting a repair line shorted to the third data line at a right side of the fifth and sixth points. In claim 5, The data pad is formed in groups, and an upper portion of the first to third repair lines formed at the edge of the first side overlaps with a portion of the first to third repair lines. Forming first and second sub repair lines connected to the repair line and the data PCB board, respectively; Shorting a seventh point at which a fourth data line belonging to a group different from the first data line where disconnection occurs, intersects a repair line which is not shorted with the first data line among the first to third repair lines; Shorting an eighth point at which a sub repair line, which is not electrically connected to the first data line, of the first and second sub repair lines adjacent to the seventh point intersects the repair line shorted to the fourth data line; Among the first to third repair lines, a repair line connected to a sub repair line electrically connected to a fourth data line through the seventh and eighth points crosses the fourth data line and the lower side of the first substrate. Shorting the ninth point, Cutting a repair line connected to the fourth data line outside the seventh and eighth points, and Cutting a repair line shorted through the fourth data line and the ninth point outside the right side of the ninth point. Repair method of the liquid crystal display device further comprising. A panel for a thin film transistor substrate comprising a plurality of data lines parallel to each other, and data pads each formed at a tip of the data line and having a plurality of groups. A data PCB substrate positioned outside the upper side of the panel where the data pad is formed and for applying a data signal to the data pad; A PCB substrate for a gate located outside the left side of the panel, A triple repair line that intersects the data lines at the top and bottom of the panel, is surrounded along the top, right and bottom edges of the panel and extends outside the panel to the data PCB substrate at the left side; A connecting portion electrically connecting an end portion of the triple repair line located above the panel with a portion of the triple repair line located on the data PCB board; The data pad is formed in units of the group, and a part of the triple pad overlaps with the triple repair line at an upper side of the panel, and each of the two repair lines is different from the triple repair line on the data PCB board. In a liquid crystal display device having a connected dual secondary repair line, When disconnection of the first data line occurs in the group adjacent to the gate PCB substrate among the plurality of groups of the data pad, the first repair line and the first data line, which is one of the triple repair lines, are located on the upper side of the panel. And shorting the first and second points crossing from the lower side and cutting the first repair line outside the right side of the first and second points, and extending to the left outside of the panel of the first repair line. Bypassing the data signal and transferring the data signal below a disconnection point of the first data line; If a second data line is disconnected in a group located in the center of the panel far from the gate PCB substrate among the plurality of groups of the data pad, the second data line is not electrically connected to the first data line of the triple repair line. Third and fourth points at which the second repair line crosses the second data line at upper and lower sides of the panel, and a fifth point at which the second repair line crosses the sub repair line adjacent to the second data line. Short-circuit and cut the second repair line at the outer point of the third and fifth points and the right point of the fourth point, respectively, to the secondary repair line, the data PCB board and the gate PCB board. Transferring the data signal below a disconnection point of the second data line using the formed second repair line as a path; Repair method of the liquid crystal display device comprising a.