KR100277931B1 - Repair system for liguid crystal display and method for liguid crystal display using the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair structure and a repair method of a liquid crystal display device, wherein the liquid crystal display device including a plurality of gate lines and data lines constitutes a TFT-LCD array. A first repair line formed around the LCD and a second repair line formed around the TFT-LCD to surround the other half of the TFT-LCD array, and recover the disconnected data line or gate line To repair the defect by welding the disconnected data line or the gate line to the first and second repair lines, welding the first and second repair lines of the overlapped portions, or cutting a predetermined portion of the first and second repair lines. This expands the repairable area.

Description

REPAIR SYSTEM FOR LIGUID CRYSTAL DISPLAY AND METHOD FOR LIGUID CRYSTAL DISPLAY USING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device. In particular, a pair or more “c” shaped structures are formed around a TFT-LCD array of a liquid crystal display device to efficiently recover a disconnected signal line. It relates to a repair structure and a repair method.

A repair line of a conventional liquid crystal display will be described with reference to the accompanying drawings.

1 is a structural plan view showing a repair line of a conventional liquid crystal display, and FIGS. 2A and 2B are structural plan views showing a conventional repair line in detail.

As illustrated in FIG. 1, a plurality of gate lines 1 are arranged in one direction with a predetermined distance on a substrate, and a plurality of data lines 20 with a constant distance in a direction perpendicular to the gate lines 1. Are arranged, and a thin film transistor (not shown) and a pixel electrode (not shown) are arranged at a portion where the gate line 1 and the data line 2 intersect each other to form a TFT-LCD array 5 Is composed.

Repair lines 3 and 4 are formed around the TFT-LCD array 5 thus constructed. The repair lines 3 and 4 are formed in a "-" shape to surround the TFT-LCD array 5 and intersect the gate line 1 and the data line 2.

That is, as shown in FIGS. 2A and 2B, the conventional repair line has been formed with two repair lines 3 and 4 or one repair line.

In the case where the repair lines 3 and 4 are formed as two repair lines 3 and 4 as shown in FIG. 2A, the repair lines 3 and 4 are separated from each other by maintaining a predetermined distance from each other and are united as shown in FIG. 2B. The line 2 or the gate line 1 crosses both sides and only one side of the gate line 1 or the data line 2.

The repair lines 3 and 4 of the conventional liquid crystal display device configured as described above are disconnected signals when the signal line (data line 2 or gate line 1) is disconnected 6 or 7 as shown in FIG. The bad signal line is repaired by connecting to the repair line at the intersection of the line.

Such a repair structure of a conventional liquid crystal display device has the following problems.

First, since two repair lines are formed as shown in FIG. 2A, two signal lines may be recovered, but only the data lines or the gate lines may be recovered, and the data lines may not be recovered by selecting the gate lines. That is, when the repair line is formed as shown in FIG. 2A, only the data line can be recovered and the gate line cannot be recovered.

Second, in the case where one repair line is formed as shown in FIG. 2B, not only has the first problem but also only one signal line can be recovered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a repair structure and a repair method of a liquid crystal display device capable of enlarging and multifunctionalizing a repairable area.

1 is a plan view showing the structure of a repair line of a conventional liquid crystal display

2A to 2D are plan views showing only the repair line of FIG. 1.

3 is a plan view showing the structure of a repair line of the liquid crystal display device according to the first embodiment of the present invention.

Figure 4 is a structural plan view showing only the repair line of the present invention

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

6 is a cross-sectional view of the repair line structure along the II-II 'line of FIG.

7 is a plan view showing the repair method of the first embodiment of the present invention.

8 is a plan view showing a repair method of a second embodiment of the present invention;

9 is a plan view showing the repair method of the third embodiment of the present invention.

10 is a cross-sectional view of a repair structure of a liquid crystal display showing a case in which a plurality of repair lines are overlapped with each other.

Explanation of symbols for main parts of the drawings

1: gate line 2: data line

3, 3a, 3b, 3c, 4, 4a, 4b, 4c: repair line 5: TFT-LCD array

6, 7: disconnection part 8: insulating film

The repair structure of the liquid crystal display device of the present invention for achieving the above object comprises a TFT-LCD array comprising a plurality of gate lines and data lines, so as to surround half of the TFT-LCD array. A first repair line formed around the TFT-LCD, and formed around the TFT-LCD so as to surround the other half of the TFT-LCD array, and both ends thereof overlap with both ends of the first repair line It is characterized by including a second repair line.

In addition, the repair method of the liquid crystal display device of the present invention includes a TFT-LCD array having a plurality of gate lines and data lines, and a plurality of gate lines intersecting a plurality of gate lines on one side of the TFT-LCD array, and a plurality of sides on the TFT-LCD array. A first repair line formed to intersect two data lines, a plurality of gate lines intersecting the plurality of gate lines on the other side of the TFT-LCD array, and a plurality of data lines intersecting the plurality of data lines on both sides of the TFT-LCD array, and both ends of the first repair line In the repair method of a liquid crystal display device having a second repair line formed so as to overlap with each other, in order to recover the disconnected data line or gate line, the disconnected data line or gate line is welded to the first and second repair line To weld the first and second repair lines of the overlapping portion or to cut a predetermined portion of the first and second repair lines. It is characterized.

The repair structure and the repair method of the liquid crystal display of the present invention as described above are as follows.

3 is a structural plan view showing a repair line of the liquid crystal display of the present invention, FIG. 4 is a structural plan view showing only a repair line of the present invention, FIG. 5 is a cross-sectional view of a repair line structure along the line II ′ of FIG. 4, FIG. 6 is a cross-sectional view of the repair line structure taken along the line II-II ′ of FIG. 4.

In the repair structure of the liquid crystal display of the present invention, a plurality of data lines are arranged on a substrate at a predetermined interval and a plurality of gate lines 1 are arranged in one direction, and a plurality of data lines are disposed at regular intervals in a direction perpendicular to the gate lines 1. (2) is arranged, and a thin film transistor (not shown) and a pixel electrode (not shown) are arranged at a portion where the gate line 1 and the data line 2 intersect, thereby forming a TFT-LCD array. (5) is comprised.

Repair lines 3 and 4 are formed around the TFT-LCD array 5 thus constructed. The repair lines 3 and 4 are formed in a "-" shape to surround the TFT-LCD array 5 and intersect the gate line 1 and the data line 2.

So far, as in the prior art, in the repair line of the present invention, the ends of the two repair lines 3 and 4 overlap each other.

This will be described in detail with reference to FIGS. 4 to 6.

When the first repair line 3 is further subdivided, a portion intersecting the data line 2 on both sides is represented as a first region 3a and a second region 3c, respectively, and a portion intersecting the gate line 1. Is called the third region 3b. In addition, the second repair line 4 is subdivided so that portions intersecting the data line 2 on both sides are represented as the first region 4a and the second region 4c, respectively, and portions intersecting the gate line 1 are shown. This is called the third region 4b.

As described above, when the first and second repair lines 3 and 4 are subdivided, the first and second repair lines 3 and 4 of the present invention overlap each other. That is, the first region 3a of the first repair line 3 and the first region 4a of the second repair line 4 intersect each other, and the second region 3c of the first repair line 3 The repair line is formed such that the second region 4c of the second repair line 4 intersects each other.

5 and 6, an insulating film is formed between the first repair line 3 and the second repair line 4.

The repair method of the liquid crystal display device of the present invention configured as described above is as follows.

7 is a plan view showing the repair method according to the first embodiment of the present invention, FIG. 8 is a plan view showing the repair method according to the second embodiment of the present invention, and FIG. 9 is a plan view showing the repair method according to the third embodiment of the present invention.

First, when a failure occurs in two data lines 2 of the data lines 2, as shown in FIG. 7, the defective data line 2 is welded at a portion intersecting with the repair lines 3 and 4. welding to repair bad data lines.

In addition, when a defect occurs in one gate line 1, as shown in FIG. 8, the defective gate line 1 is welded at a portion intersecting with the repair lines 3 and 4, and the two repairs are performed. The lines 3 and 4 are welded at overlapping portions.

On the other hand, when a failure occurs in the two gate lines 1, as shown in Figure 9, the defective gate line 1 is welded at the intersection with the repair lines (3, 4), the two The repair lines 3 and 4 are welded so as to be electrically connected to each other at overlapping portions, and the repair lines 3 and 4 between the defective gate lines 1 are cut.

FIG. 10 is a cross-sectional view of a repair structure of the liquid crystal display showing a case where a plurality of repair lines are overlapped.

That is, a plurality of repair lines as shown in FIG. 4 may be formed to recover data lines and gate lines in which failure occurs as described above.

As described above, the repair structure and the repair method of the liquid crystal display device of the present invention have the following effects.

First, since the ends of the repair line are overlapped, at least two bad signal lines can be recovered by a pair of repair lines.

Second, since the overlapped portions of the repair line can be welded and used as a repair ring, even if the repair line is formed as a repair line for data line recovery, the gate line can be recovered, thereby increasing the repairable area.

Third, forming a pair of repair lines can maximize the above effects.

Claims (7)

A liquid crystal display device comprising a plurality of gate lines and data lines to form a TFT-LCD array, A first repair line formed around the TFT-LCD to surround half of the TFT-LCD array; And a second repair line formed around the TFT-LCD so as to surround the other half of the TFT-LCD array, and both end portions overlapping both ends of the first repair line. Repair structure of the display. The method of claim 1, The first repair line and the second repair line in a pair of repair structure of the liquid crystal display, characterized in that formed in plural. The method of claim 1, The first repair line may include first and second regions crossing the plurality of data lines on both sides of the TFT-LCD array and intersecting the plurality of gate lines on one side of the TFT-LCD array and connecting the first and second regions. The second repair line includes first and second regions intersecting the plurality of data lines on both sides of the FT-LCD array and the plurality of gate lines on the one side of the TFT-LCD array. A third region connecting the second region, wherein an end portion of the first region of the first repair line and the first region of the second repair line overlap each other, and the second region and the second repair line of the first repair line A repair structure of the liquid crystal display device, characterized in that the end portions of the second area of the overlapping each other are formed. A TFT-LCD array having a plurality of gate lines and data lines, and a first repair line formed to intersect a plurality of gate lines on one side of the TFT-LCD array and intersect a plurality of data lines on both sides of the TFT-LCD array And a second repair line intersecting the plurality of gate lines on the other side of the TFT-LCD array, intersecting the plurality of data lines on both sides of the TFT-LCD array, and both ends are formed to overlap the first repair line. In a repair method of a liquid crystal display device, To repair the disconnected data line, the disconnected data line or gate line is welded to the first and second repair lines, and the first and second repair lines of the overlapped portions are welded or the first and second repair lines are used. Repairing a predetermined portion of the liquid crystal display device characterized in that the repair method. The method of claim 4, wherein When an arbitrary data line is broken, the broken data line and the first or second repair line are welded. The method of claim 4, wherein When one gate line is disconnected, the disconnected gate line is welded to the first repair line and the second repair line and the first and second repair lines of the overlapped portion are repaired. Way. The method of claim 4, wherein When two gate lines are disconnected, the two disconnected gate lines are welded to the first repair line and the second repair line, the first and second repair lines of the overlapped portion are welded, and the two gates are disconnected. A first repair line and a second repair line between the lines are cut, wherein the repair method of a liquid crystal display device.

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