KR100777697B1 - Thin film transistor array substrate for liquid crystal display with repair line - Google Patents

Abstract

A plurality of gate lines and data lines that cross each other are formed on the thin film transistor array substrate. A gate pad and a data pad connected to one end of the gate line and the data line are formed, respectively, and a gate pad portion and a data pad portion in which the gate pad and the data pad are formed in a plurality of groups are formed. A data PCB board is formed on the outer side of the substrate on which the data pad unit is formed, and an op amp is mounted on a predetermined area of the data PCB board, and a first diesel repair line that is an input terminal of the op amp is formed. . A gate PCB substrate is formed on the left outer side of the substrate on which the gate pad portion is formed, and a gate oil PCB output line is formed on the gate PCB substrate, and a second diesel repair line electrically connected to the first diesel repair line is formed. have. A lower repair line overlapping the data line and electrically connected to the second diesel repair line is formed below the substrate. An auxiliary repair line is formed at both ends of the second repair line which is insulated from and crosses at least two lower repair lines.

PCB board, op amp, overshoot, repair line, sub repair line

Description

Thin film transistor array board for liquid crystal display device having repair line {THIN FILM TRANSISTOR ARRAY SUBSTRATE FOR LIQUID CRYSTAL DISPLAY WITH REPAIR LINE}

1 is a plan view showing a repair line structure of a thin film transistor array substrate for a liquid crystal display according to a first embodiment of the present invention;

2 and 3 are plan views illustrating a method of repairing disconnection of a data line using a repair line according to a first embodiment of the present invention;

4 is a plan view illustrating a repair line structure of a thin film transistor array substrate for a liquid crystal display according to a second exemplary embodiment of the present invention and a method of repairing data line breaks using the repair line.

The present invention relates to a thin film transistor array substrate for a liquid crystal display device having a repair line.

The liquid crystal display device includes a thin film transistor array substrate, a color filter substrate facing the thin film transistor array substrate, and a liquid crystal material injected between the two substrates, and is a display device using an electro-optic effect of the liquid crystal material injected therein. .

In general, a plurality of gate lines and data lines intersecting with each other are formed on a thin film transistor array substrate, and a plurality of thin film transistors and pixel electrodes are formed in a matrix-type pixel region in which gate lines and data lines are defined as intersections. Gate pads and data pads are formed at the end of the gate line and the end of the data line, respectively, and the pad portion on which the pad is formed is located outside the display area formed of a set of pixel areas and is not covered by the color filter substrate.

On the upper side and the left side of the thin film transistor array substrate, a PCB substrate for a gate and a data PCB substrate for transmitting electrical signals from the outside are disposed, and each PCB substrate converts electrical signals into scan signals and data signals, respectively, for pads and wiring. The integrated circuits are connected to the thin film transistor array substrate by a tape carrier package (TCP) on which the driving integrated circuits are output.

In the process of manufacturing such a liquid crystal display device may be a number of reasons for the failure to reduce the process yield, but the data wiring connected from the output terminal of the data driving integrated circuit to the source terminal of each thin film transistor to transfer the image signal Open defects are a major cause of reduced yields.

As a method of solving such a problem, there is a method of forming a repair line crossing the wiring outside the display area and bypassing a signal transmitted to the wiring around the display area through the repair line. However, the method of bypassing the signal around the display area has a problem in that the delay of the signal is large. In order to solve this problem, a part of the repair line is routed through the PCB board, and an op amp mounted on the PCB board and the repair line are electrically connected to compensate for the distorted image signal.

However, this method has another problem when the path through which a signal is transmitted is greatly uneven. In other words, when the signal path is transmitted through the repair line, and the signal delay is large, a normal image signal can be displayed by compensating for the signal delay through the op amp, but the signal path is relatively short through the repair line. In this case, an over shoot phenomenon occurs in which the waveform is slightly higher than a normal signal. Then, since the charged amount of the repaired pixel is larger than that of the normal pixel, the overshoot image signal of the repaired data line is easily distinguished by the eye compared with the image signal of the normal data line part.

In order to eliminate this problem, the op amp can be uniformly delayed through the repair line in accordance with the signal transmission path, but the manufacturing process is complicated due to the process change such as material dualization and separate circuit configuration. Become. As the liquid crystal display substrate becomes larger, the overshoot of the image signal is more severe.

An object of the present invention is to provide a thin film transistor array substrate for a liquid crystal display device, which can have a uniform path through which a signal is transmitted through a repair line, and can prevent overshoot of an image signal.

In order to solve this problem, the present invention forms an auxiliary repair line that is insulated from at least two repair lines and intersects each other, or forms a repair line in the shape of a bevel so as to intersect one signal line twice so that the signal is transmitted through the repair line. Allows you to control the route forwarded.

According to the present invention, a plurality of gate lines and data lines are formed on the thin film transistor array substrate to cross each other and define a plurality of pixel regions. Gate pads and data pads, which are formed outside the display area formed of a set of pixel areas, connected to one end of the gate line and the data line, respectively, form the gate pad part and the data pad part in a plurality of groups. A plurality of repair lines formed outside the display area and insulated from and intersecting with the data lines and auxiliary repair lines in which both ends are insulated from and cross at least two repair lines are formed.

In this case, the gate PCB substrate and the data PCB substrate, which are respectively located outside the substrate and connected to the gate pad portion and the data pad portion by tape carrier packages, may be installed.

In this case, the repair line is connected to a plurality of first diesel repair ships formed on the data PCB substrate, and a plurality of second diesel repair ships connected to the first diesel repair ships and formed on the gate PCB board.

In this case, an op amp may be formed between the first diesel repair ship and the second diesel repair ship and may prevent a delay of a signal transmitted through the repair ship.                     

Then, a thin film transistor array substrate for a liquid crystal display device having a repair line 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.

First, a structure of a thin film transistor array substrate for a liquid crystal display according to a first embodiment of the present invention will be described with reference to FIG. 1.

1 is a plan view of a thin film transistor array substrate for a liquid crystal display according to a first exemplary embodiment of the present invention.

As illustrated in FIG. 1, a plurality of gate lines 14 are formed in a horizontal direction on the thin film transistor array substrate 12, and a plurality of data lines 16 intersecting the gate lines 14 are arranged in a vertical direction. Formed. In the pixel region 18 defined by the gate line 14 and the data line 16, a thin film transistor (not shown) as a switching element is formed, and such a plurality of pixel region 18 sets are display regions for displaying an image. (20). A gate pad (not shown) connected to the left end of the gate line 14 is formed outside the display area 20 of the thin film transistor array substrate 12 not covered by the color filter substrate 10, and the data line 16 is connected to the data line 16. A data pad (not shown) connected to the upper end is formed. Each of the gate pads and the data pads is gathered in group units to form a plurality of gate pad portions 22 and data pad portions 24.

A gate PCB substrate 26 and a data PCB substrate 28 are disposed on upper and left outer portions of the substrate 12, and the gate PCB substrate 26 and the data PCB substrate 28 are driven integrated circuits. 30 and a lead wire (not shown) connected thereto are electrically connected to the gate pad portion 22 and the data pad portion 24 by tape carrier packages (TCP) 32 mounted thereon, respectively. . An FPC film 42 is formed between the gate PCB substrate 26 and the data PCB substrate 28, and between the thin film transistor array substrate 12 and the gate PCB substrate 26.

Repair lines for repairing disconnections 13 and 15 of the signal lines 14 and 16 are formed in the upper and lower peripheral portions of the substrate 12 and the gate and data PCB substrates outside the display area. At this time, the repair line is formed on the lower periphery of the substrate 12 and is connected to the lower repair line 38 and the lower repair line 38 that are insulated from and cross the day line and pass through the gate PCB board 26. It consists of the 1st light oil repair line 36 extended from the 2nd light oil repair line 36 and the 2nd light oil repair line 34 passing through the data PCB board 28. As shown in FIG. The op amp 40 is mounted in a predetermined region of the data PCB board 28 to prevent a delay of a signal transmitted, and the first and second repair lines 34 and second via oil lines are respectively provided at the input and output terminals of the op amp 40. The repair line 36 is electrically connected. The first diesel repair ship 34 and the second diesel repair ship 36 and the connection wiring (not shown) connecting the second diesel repair ship 36 and the lower repair ship 38 are the FPC film 42. It is formed in.

In addition, a plurality of auxiliary repair lines 44 are formed on the lower periphery of the thin film transistor array substrate 12, at least two ends of which are insulated from and intersected with the lower repair line 38, respectively. ) Has the function to adjust the route of signal transmission.

Next, a method of repairing a disconnected data line in the thin film transistor array substrate will be described with reference to FIGS. 2 and 3.

FIG. 2 illustrates a method of preventing overshoot of an image signal generated when a signal amplified by an op amp passes through a repair path of a short path, and FIG. 3 illustrates repairing two signal lines having different signal paths. Shows a method of making the signal line uniform.

As shown in FIG. 2, when disconnection 13 occurs in any data line in a data line group relatively close to the gate PCB substrate 26, the lower repair line 38 and the disconnected data line 13 are disconnected. This overlapping point (·) is short-circuited with a laser. Next, the front end of the lower repair line 38 short-circuited with the data line 13 is cut (x). Next, any one of a plurality of auxiliary repair lines 44 formed between the lower repair line 38 is shorted by a laser. At this time, the auxiliary repair line 44 is selected in consideration of the path through which the signal is transmitted so that the overshoot phenomenon does not occur. By doing so, the data signal applied through the data pad is transmitted through the data line to the disconnection point, and the data away from the gate PCB substrate 26 in the direction of the arrow, as shown in FIG. 2, across the disconnection point. The first diesel repair ship 34 and the second diesel repair ship 36, the lower repair ship 38, the auxiliary repair ship 44, the lower repair ship 38, and the data line 13 which are insulated from and cross the wire Passed by path.

In this way, when disconnection 13 occurs in any one of the data lines in the data line group, one of several auxiliary repair lines 44 formed at both ends between the lower repair lines 38 is selected to route the repair line. It can be adjusted to prevent overshoot of the image signal generated when the signal amplified by the op amp passes through a short repair line. In addition, this method can prevent overshooting of the image signal which may occur due to the size change and the process change of the substrate 12.

Next, a method of repairing a disconnected data line will be described with reference to FIG. 3.

As shown in FIG. 3, first, when disconnection 15 occurs in the data line at a position far from the gate PCB substrate 26, the second lower repair line 37 ′ and the disconnected data line 15 are separated. Short the overlapping points with a laser. In this way, the data signal applied through the data pad is transmitted through the data line to the disconnection point 15, and the first and second transit repair lines 34 and 36 and the lower repair line 38 across the disconnection point. And data line 15 as a path.

Next, when disconnection 13 occurs in any one of the data lines in the data line group relatively close to the gate PCB substrate 26, the process proceeds in the same manner as in the repair method of FIG. Here, the auxiliary repair line 44 is selected so as to be uniform with the signal path of the repair line for repairing the disconnected data line 15 and short-circuits both ends with a laser. In this way, the data signal applied through the data pad is transmitted through the data line up to the disconnection point, and as shown in FIG. 3, across the disconnection point, the first diesel repair line 34 and the second via line 34 in the direction of the arrow. The diesel service ship 36, the lower repair ship 38, the auxiliary repair ship 44, the lower repair ship 38, and the data line 13 are routed.

As such, when repairing two signal lines having different signal paths, the signal paths may be selected such that both ends thereof make the same signal paths different from the auxiliary repair line 44 in contact with the lower repair line 38. Therefore, the signal path through which the signal is transmitted through the repair line can be made uniform.

A thin film transistor array substrate for a liquid crystal display according to a second exemplary embodiment of the present invention will be described with reference to FIG. 4.

4 is a plan view of a thin film transistor array substrate according to a second embodiment of the present invention.

The thin film transistor array substrate according to the second embodiment of the present invention is also substantially the same as the first embodiment. However, the first lower repair line 39 insulated from and intersecting with the disconnection 13 generated in any one data line in the data line group is formed in a horseshoe shape so as to intersect one data line 16 twice. In the case of repairing the data line transmitted through the repair line 39, it is possible to make it uniform with the signal path generated by repairing the disconnected data line 15 at a position far from the gate PCB board 26. The suit can be prevented.

Next, a method of repairing a disconnected data line according to a second embodiment of the present invention will be described with reference to FIG. 4.

As shown in FIG. 4, when disconnection 13 occurs in any data line in the data line group relatively close to the gate PCB substrate 26, the disconnected data line 13 and the horseshoe shape are formed. The point where the first lower repair line 39 overlaps is short-circuited with a laser. By doing so, the data signal applied through the data pad is transmitted through the data line to the disconnection point, and the first via repair line 34 electrically connected to the input / output terminal of the op amp 40 across the disconnection point, respectively; The second diesel oil repair ship 36, the horseshoe-shaped first lower repair ship 39 and the data line 13 are transmitted as a path.

On the other hand, when disconnection 15 occurs in the data line at a position far from the gate PCB substrate 26, the data signal is transmitted in the same manner as in FIG. 3 of the first embodiment of the present invention.

In the second embodiment of the present invention, since the path of the first lower repair line 39 formed in the shape of a horseshoe, which is a signal path, may be adjusted so that the signal may be uniform, the signal amplified as in the first embodiment of the present invention may be It is possible to prevent overshoot of an image signal generated when a short repair line passes, and to uniformize a signal to which a signal is transmitted through the repair line. In addition, this method is excellent in identifying the number of short circuits and laser short circuit locations of the repair line because the repair line is formed in a constant shape, and the shape of the repair line may need to be changed according to the change in the substrate size and the process change.

As described above, according to the present invention, the lower repair line formed in a horseshoe shape so as to cross the auxiliary repair line or the data line which is insulated from at least two lower repair lines and intersects twice can be adjusted to have a uniform signal path. The overshoot of the image due to the path can be prevented, and the path through which the signal is transmitted through the repair line can be made uniform. Therefore, the reliability and productivity of a liquid crystal display device can be improved.

Claims (8)

A plurality of gate lines and data lines crossing each other to define a plurality of pixel regions; A plurality of gate pads and data pads formed outside of the display area formed of the pixel area and having a plurality of gate pads and data pads connected to one end of the gate line and the data line, respectively; A plurality of repair lines formed outside the display area and insulated from and intersecting the data lines; and An auxiliary repair ship that is insulated from and crosses at least two repair ships of the plurality of repair ships Thin film transistor array substrate for a liquid crystal display device comprising a. In claim 1, And a gate PCB substrate and a data PCB substrate respectively positioned on the outside of the substrate and connected to the gate pad portion and the data pad portion in a tape carrier package, respectively. In claim 2, The repair line includes a plurality of first light repair lines formed on the data PCB substrate, and a plurality of second light repair lines connected to the first light repair lines and formed on the gate PCB board. Thin film transistor array substrate for display device. In claim 3, And an op amp formed between the first light repair line and the second light repair line and preventing a delay of a signal transmitted through the repair line. A plurality of gate lines and data lines crossing each other to define a plurality of pixel regions; A plurality of gate pads and data pads formed outside of the display area formed of the pixel area and having a plurality of gate pads and data pads connected to one end of the gate line and the data line, respectively; And A plurality of repair lines formed outside the display area and insulated from and intersecting the data lines; Including, At least one repair line of the plurality of repair lines is formed in a horseshoe shape insulated from at least one of the plurality of data lines on the opposite side of the data pad part and intersecting twice. Thin film transistor array substrate. In claim 5, And a gate PCB substrate and a data PCB substrate respectively positioned on the outside of the substrate and connected to the gate pad portion and the data pad portion in a tape carrier package, respectively. In claim 6, The repair line includes a plurality of first light repair lines formed on the data PCB substrate, and a plurality of second light repair lines connected to the first light repair lines and formed on the gate PCB board. Thin film transistor array substrate for display device. In claim 7, And an op amp formed between the first diesel repair ship and the second diesel repair ship and preventing an delay of a signal transmitted through the repair ship. Thin film transistor array substrate for devices.

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