KR20070104961A - A gate driver and a method for repairing the same - Google Patents

Abstract

A gate driving circuit and a repair method thereof are provided to increase a success rate of laser welding for connecting the plurality of lines by forming at least two welding point at which a plurality of lines are intersected each other in a gate driving circuit. A shift resistor(SR) has at least one output line(241a). At least one first protruding portions protrude from one side of each of the output lines. One or more output repair lines(222a,222b,222c) are arranged to intersect the respective output lines. At least one second protruding units protrude from one sides of the output repair lines, and overlap the first protruding portions, respectively. At least one third protruding portions protrude from other sides of the output lines, respectively. At least one fourth protruding portions protrude from other sides of the output repair lines, respectively.

Description

Gate driver circuit and repair method thereof {A gate driver and a method for repairing the same}

1 is a diagram illustrating a conventional shift register.

2 shows a gate driving circuit according to a first embodiment of the present invention;

3 is a view for explaining an example in which laser welding is performed.

4 is a view for explaining a welding point formed to perform laser welding according to a second embodiment of the present invention.

5 is a view for explaining another configuration of the welding point shown in FIG.

6 is a view for explaining still another configuration of the welding point shown in FIG.

＊ Description of symbols for main parts of the drawings ＊

241a: output line 222a: first output repair line

222b: second output repair line 222c: third output repair line

401a to 401c: first welding point

402a to 402c: second welding point

403a to 403c: third welding point

According to the present invention, at least two welding points are formed on wires formed to intersect with each other, thereby increasing the success rate of a laser welding process for connecting them, and improving a repair rate in the case of a poor connection. The present invention relates to a gate driving circuit and a repair method thereof.

Conventional liquid crystal display devices display an image by adjusting the light transmittance of the liquid crystal using an electric field. To this end, the liquid crystal display includes a liquid crystal panel in which pixel regions are arranged in a matrix, and a driving circuit for driving the liquid crystal panel.

In the liquid crystal panel, a plurality of gate lines and a plurality of data lines are arranged to cross each other, and a pixel region is positioned in an area defined by vertical crossings of the gate lines and the data lines. Pixel electrodes and a common electrode for applying an electric field to each of the pixel regions are formed in the liquid crystal panel.

Each of the pixel electrodes is connected to the data line via a source terminal and a drain terminal of a thin film transistor (TFT) which is a switching element. The thin film transistor is turned on by a scan pulse applied to a gate terminal via the gate line, so that the data signal of the data line is charged to the pixel voltage.

The driving circuit may include a gate driver for driving the gate lines, a data driver for driving the data lines, a timing controller for supplying a control signal for controlling the gate driver and the data driver, and a liquid crystal display device. It is provided with a power supply for supplying a variety of driving voltages used in.

The timing controller controls driving timing of the gate driver and the data driver and supplies a pixel data signal to the data driver. The power supply unit boosts or decompresses an input power to generate driving voltages such as a common voltage VCOM, a gate high voltage signal VGH, and a gate low voltage signal VGL required by the liquid crystal display. The gate driver sequentially supplies scan pulses to the gate lines to sequentially drive the liquid crystal cells on the liquid crystal panel by one line. The data driver supplies a pixel voltage signal to each of the data lines whenever a scan pulse is supplied to any one of the gate lines. Accordingly, the liquid crystal display displays an image by adjusting light transmittance by an electric field applied between the pixel electrode and the common electrode according to the pixel voltage signal for each liquid crystal cell.

Here, the gate driver includes a gate driving circuit to sequentially output the scan pulses as described above. In general, the gate driving circuit includes a shift register.

This will be described in more detail with reference to the accompanying drawings.

1 is a diagram illustrating a conventional shift register.

The conventional shift register includes a plurality of stages ST101 to ST10n + 1 that are dependently connected to each other. The remaining stages ST101 to ST10n + 1 except for the dummy stage ST101n + 1 sequentially output scan pulses and supply the scan pulses to the gate lines of the display unit.

On the other hand, each of the stages ST101 to ST10n + 1 is enabled by receiving scan pulses from the stage located at the front end thereof, and is disabled by receiving the scan pulses from the stage located at the next stage.

For this operation, each stage ST101 to ST10n has three output lines 141a, 141b, and 141c.

That is, each first output line 141a electrically connects between the stage and the corresponding gate line, and each second output line 141b electrically connects between the first output line 141a and the next stage. Each third output line 141c electrically connects the first output line 141a and the previous stage.

On the other hand, when one of the stages ST101 to ST10n + 1 fails and becomes inoperable, all stages located at the rear of the inoperable state cannot generate output.

For example, as shown in FIG. 1, when a failure occurs in the third stage ST103 and the third stage ST103 is inoperable, scan pulses are not output from the third stage ST103. .

Here, the fourth stage ST104 located immediately after the third stage ST103 is enabled by receiving the scan pulse from the third stage ST103 as a start pulse, and thus the third stage ST103. ) Becomes inoperable, the fourth stage ST104 is not enabled. Therefore, the fourth stage ST104 may not output the scan pulse.

In addition, the fifth stage located immediately after the fourth stage ST104 is enabled by receiving the scan pulse from the fourth stage ST104 as a start pulse. Thus, the fourth stage ST104 is scanned. Since the pulse is not outputted, the fifth stage is also not enabled.

In this manner, all the sixth to nth stages ST10n cannot output scan pulses.

Therefore, the third to nth gate lines connected to the nth stage ST10n from the third stage ST103 where the failure occurs may not be driven. As a result, a problem arises in that the pixel cells connected to the third to nth gate lines do not display an image.

The present invention has been made to solve the above problems, and provides a gate driving circuit and a driving method thereof capable of recovering the stage of the inoperable state by providing a plurality of auxiliary stages that can replace the stage in the inoperative state. In addition, at least two welding points are formed on a plurality of wires formed to intersect with each other, thereby increasing a success rate during laser welding for connecting them. In addition, it is an object of the present invention to provide a gate driving circuit and a repair method thereof that can improve the yield in the manufacturing process of a liquid crystal display device by increasing the repair rate when the connection between the wirings is poor.

A gate driving circuit according to the present invention for achieving the above object, the shift register having at least one output line; At least one first protrusion protruding from one side of each output line; At least one output repair line arranged to intersect the output lines; And at least one second protrusion protruding from one side of each of the output repair lines and overlapping the first protrusions.

In addition, a repair method of a gate driving circuit according to the present invention for achieving the above object includes a shift register having at least one output line, at least one first protrusion protruding from one side of each output line, At least one output repair line arranged to intersect with each output line, and at least one second protrusion protruding from one side of each output repair line and overlapping with each of the first protrusions CLAIMS 1. A repairing method of a gate driving circuit, comprising: performing a welding process at an intersection between each output line and each output repair line; Confirming that each intersection is electrically connected; And performing a welding process between each of the first and second protrusions according to the checking result.

Hereinafter, a gate driving circuit according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a gate driving circuit according to a first embodiment of the present invention.

As shown in FIG. 2, the gate driving circuit according to an exemplary embodiment of the present invention is arranged to intersect the shift register SR having a plurality of first output lines 241a and the first output line 241a. First, second, and third output repair lines 222a, 222b, and 222c, and first to fourth clock transmission lines for transmitting first to fourth clock pulses CLK1 to CLK4 having a phase difference. 288a through 288d, a clock repair line 266 arranged to intersect the first through fourth clock transmission lines 288a through 288d, and the first through third output repair lines 222a, 222b, and 222c. And the auxiliary stage 270 connected to the clock repair line 266.

Here, the intersections 281a, 281b, 281c, and 283 in which the laser welding is to be performed on the plurality of output lines 241a, the clock transmission lines 288a to 288d, and the clock repair lines 222a, 222b, and 222c. At least two welding points are formed.

Here, the shift register SR includes first to nth stages ST201 to ST20n and a dummy stage ST20n + 1. The stages ST201 to ST20n + 1 output scan pulses in order from the first stage ST201 to the dummy stage ST20n + 1 and supply them to the display unit 200 of the liquid crystal panel. Here, the first to nth stages ST201 to ST20n except for the dummy stage ST20n + 1 supply scan pulses output from the first stage to the corresponding gate line provided in the display unit 200. Therefore, the gate lines GL1 to GLn are sequentially driven in order from the first gate line GL1 to the nth gate line GLn.

These stages ST201 to ST20n + 1 are enabled in response to the scan pulse from the stage positioned at the front end from the stage, and are disabled in response to the scan pulse from the stage located at the rear end from the stage. Each enabled stage receives one of at least two clock pulses having a phase difference and supplies it as a scan pulse to a corresponding gate line. In contrast, each disabled stage deactivates the corresponding gate line by outputting an off voltage source and supplying it to the corresponding gate line.

For example, the second stage ST202 is enabled in response to the first scan pulse from the first stage ST201 and is disabled in response to the third scan pulse from the third stage ST203. The enabled second stage ST202 receives the second clock pulse CLK2 among the first to fourth clock pulses CLK1 to CLK4 having a phase difference, and then scans the second clock line CLK2 to the second gate line GL2. Supply as a pulse.

For this operation, each stage ST202 to ST20n except for the first stage ST201 and the dummy stage ST20n + 1 has a first to third output line 241a to 241c for outputting the scan pulse. And a first input terminal for receiving clock pulses from clock transmission lines 288a, 288b, 288c, and 288d, and second and third input terminals for receiving scan pulses from front and rear stages.

Here, the first output line 241a of each of the stages ST201 to ST20n electrically connects the stages ST201 to ST20n to each gate line, and a second output of each of the stages ST201 to ST20n. Line 241b electrically connects between its first output line 241a and the next stage, and the third output line 241c of each stage ST202 to ST20n is its first output line. 241a and the previous stage are electrically connected.

That is, one end of the first output line 241a of each of the stages ST201 to ST20n is connected to each of the stages ST201 to ST20n, and the other end is connected to the respective gate lines GL1 to GLn. One end of the second output line 241b of each of the stages ST201 to ST20n is connected to the first output line 241a, and the other end is connected to the second input terminal of the rear stage. One end of the third output line 241c of each of the stages ST201 to ST20n is connected to the first output line 241a, and the other end thereof is connected to the third input terminal of the preceding stage. The first input terminal of each of the stages ST201 to ST20n is connected to a corresponding clock transmission line.

For example, the first output line 241a of the second stage ST202 electrically connects the second stage ST202 and the first gate line GL1 to form the first output line 241a of the second stage ST202. The second output line 241b electrically connects the first output line 241a of the second stage ST202 and the third stage ST203, and the third output line 241c of the second stage ST202. ) Electrically connects the first output line 241a of the second stage ST202 and the first stage ST201.

On the other hand, since there is no stage in front of the first stage ST201, the first stage ST201 has a first output line 241a, a second output line 241b, a first input terminal, and a second input terminal. It has an input terminal.

Since the stage does not exist next to the dummy stage ST20n + 1, and the dummy stage ST20n + 1 does not output to the gate line, the dummy stage ST20n + 1 is a third stage. It has an output line 241c and a second input terminal.

First to third output repair lines 222a, 222b, and 222c are formed on the first output lines 241a to intersect the first output lines 241a. In this case, an insulating film is formed between each of the output repair lines 222a, 222b, and 222c and the first output line 241a, so that each of the output repair lines 222a, 222b, and 222c and the first output line 241a is formed. Electrically separate between them.

On the other hand, the auxiliary stage 270 has three input terminals and one output terminal. Here, the first input terminal of the auxiliary stage 270 is connected to the clock repair line 266, the second input terminal of the auxiliary stage 270 is connected to the first output repair line 222a, and the auxiliary input. The third input terminal of the stage 270 is connected to the third output repair line 222c, and the output terminal of the auxiliary stage 270 is connected to the second output repair line 222b.

The clock repair line 266 is formed on the clock transmission lines 288a to 288d to intersect the clock transmission lines 288a to 288d. In this case, an interlayer insulating film is formed between the clock repair line 266 and the clock transmission lines 288a through 288d to electrically separate the clock repair line 266 and the clock transmission lines 288a through 288d. Let's do it.

The auxiliary stage 270 operates in the same manner as the stages ST201 to ST20n + 1. That is, the auxiliary stage 270 is enabled by receiving a signal input through its second input terminal, and receives the signal (clock pulse) input to its first input terminal in the enabled state. Output as a recovery scan pulse through the output terminal.

If a failure occurs in any stage in the gate driving circuit according to the first embodiment of the present invention configured as described above and the stage is inoperable, a method for recovering the gate driving circuit having the inoperable stage will be described in detail. Is as follows.

When the third stage ST203 is inoperable, the third stage ST203 generates no output.

That is, the first and second stages ST201 and ST202 shown in FIG. 3 operate normally to show that the first and second gate lines GL1 and GL2 are normally driven. Specifically, the third stage ( ST203 may become inoperable and thus may not output scan pulses from the third stage ST203 and the fourth stage ST204 located at the rear end of the third stage ST203 to the dummy stage ST20n + 1. Assuming that the third to nth gate lines GL3 to GLn connected to the third to nth stages ST203 to ST20n are not supplied with scan pulses.

In order to recover the gate driving circuit, first, the third stage ST203 and the first output line 241a (the first output line 241a connected to the third stage ST203) are electrically disconnected. . That is, by irradiating and removing a laser beam on a portion of the first output line 241a, the third stage ST203 and the first output line 241a may be electrically separated. In this case, the portion 399a in which the first output line 241a is disconnected has an intersection point with the output terminal of the third stage ST203 (the first output line 241a and the first stage of the third stage ST203). 3 points of intersection of the output lines 241c).

Subsequently, the third stage ST203 and the third clock transmission line 288c are electrically separated from each other. That is, as shown in FIG. 3, a portion of the third clock transmission line 288c is irradiated and removed to electrically separate the third stage ST203 and the third clock transmission line 288c. You can.

In this way, the third stage ST203 may be electrically separated from the third gate line GL3. Thus, the third stage ST203 may electrically separate the third stage ST203 from the third gate line GL3. The reason is to prevent the distorted scan pulse that may be output from the third stage ST203 from being supplied to the third gate line GL3.

Next, the second output repair line 222b and one first output line 241a are electrically connected to each other. Here, the first output line 241a represents the first output line 241a connected to the stage which is in an inoperable state, that is, the third stage ST203.

This electrical connection may be achieved by performing laser welding to irradiate a laser beam at an intersection point 281b between the second output repair line 222b and the second output line 241b.

Next, the first output repair line 222a and another first output line 241a are electrically connected to each other. Here, the first output line 241a represents a stage located immediately before the stage in which the inoperable state, that is, the first output line 241a connected to the second stage ST202.

This electrical connection may be achieved by performing laser welding at the intersection 281a between the first output repair line 222a and the first output line 241a.

Next, the third output repair line 222c and another first output line 241a are electrically connected to each other. Here, the first output line 241a indicates a first output line 241a connected to a stage located immediately after the stage in the inoperable state, that is, the fourth stage ST204.

This electrical connection may be achieved by performing laser welding at the intersection 281c between the third output repair line 222c and the first output line 241a.

Next, the clock repair line 266 and one clock transmission line 288a, 288b, 288c, or 288d are electrically connected to each other. Here, the clock transmission line represents a clock transmission line transmitting the same clock pulse as the clock pulse supplied to the third stage ST203 which is in an inoperable state. That is, the clock transmission line represents a third clock pulse transmission line 288c that transmits a third clock pulse CLK3. The third clock transmission line 288c and the clock repair line 266 are electrically connected to each other.

This electrical connection may be achieved by performing laser welding at the intersection point 283 between the clock repair line 266 and the third clock transmission line 241a.

In this way, the first input terminal of the auxiliary stage 270 is connected to the third clock transmission line 288c through the clock repair line 266, and the second input terminal of the auxiliary stage 270 is connected to the first input terminal of the auxiliary stage 270. The output terminal of the auxiliary stage 270 is connected to the first output line 241a (the first output line 241a connected to the second stage ST202) through the first output repair line 222a. A second input terminal of the auxiliary stage 270 is connected to the first output line 241a (the first output line 241a connected to the third stage ST203) through the two output repair line 222b. The third output repair line 222c is connected to the first output line 241a (the first output line 241a connected to the fourth stage ST204).

When the gate driving circuit according to the first embodiment of the present invention thus restored is operated, first stage ST201 is enabled in response to the start pulse Vst, and in this enabled state, the first clock transmission is performed. The first clock pulse CLK1 is supplied from the line 288a and output as the first scan pulse. Then, the first scan pulse is supplied to the first gate line GL1 through its first output line 241a and the second stage (via its first and second output lines 241a and 241b). ST202).

Subsequently, the second stage ST202 is enabled in response to the first scan pulse from the first stage ST201, and the second clock pulse 288b from the second clock transmission line 288b is enabled in this enabled state. CLK2) is supplied and output as a second scan pulse. The second scan pulse is supplied to the second gate line GL2 through its first output line 241a and the third stage (via its first and second output lines 241a and 241b). ST2030 is supplied to the first stage ST201 through its first and third output lines 241b and 241c.

Since the third stage ST203 is in an inoperable state, the third stage ST203 cannot output the third scan pulse even though the second scan pulse is supplied from the second stage ST202.

On the other hand, the second scan pulse supplied to the first output line 241a of the second stage ST202 is supplied to the auxiliary stage 270 through the intersection point 281a and the first output repair line 222a. do.

Then, the auxiliary stage 270 is enabled in response to the second scan pulse, and receives the third clock pulse CLK3 from the third clock transmission line 288c in the enabled state and scans it for recovery. Output as a pulse. This recovery scan pulse is eventually the same scan pulse as the third scan pulse.

The recovery scan pulse output from the auxiliary stage 270 is supplied to the second output repair line 222b through an output terminal, and the recovery scan pulse supplied to the second output repair line 222b is an intersection point ( 281b), first output line 241a (first output line 241a connected to third stage ST203), and second output line 241b (second output connected to third stage ST202). The line 241b is supplied to the fourth stage ST204. Therefore, the fourth stage ST204 may be enabled.

Accordingly, scan pulses may be sequentially output from the fourth stage ST204 to the dummy stage ST20n + 1. As a result, the auxiliary stage 270 outputs a scan pulse instead of the stage in an inoperable state.

In addition, the scan pulse output from the fourth stage ST204 is a first output line 241a (a first output line 241a, an intersection point 281c, and a third connected to the fourth stage ST204). It is supplied to the auxiliary stage 270 via an output repair line 222c, thereby disabling the auxiliary stage 270. Thus, the auxiliary stage 270 outputs one scan pulse per frame. do.

The clock repair line may be connected to the third input terminal of the auxiliary stage 270 instead of the third output repair line 222c.

Herein, a welding point formed to perform laser welding at each of the intersections 281a, 281b, 281c, and 283 will be described in detail with reference to an example.

3 is a diagram for specifically describing an example in which laser welding is performed.

As shown in FIG. 3, when the laser welding is performed at each of the intersection points 281a, 281b, 281c, and 283, the energy difference is different depending on the processing capability of the welding equipment. The welding does not happen. Therefore, when energy is excessively applied during the laser welding, a defect occurs in that wires to be connected to each other are rather disconnected.

4 is a view for explaining in detail the welding point formed to perform laser welding according to a second embodiment of the present invention.

As illustrated in FIG. 4, the first welding points 401a to 401c may be formed in a stepped shape in a diagonal direction at the intersection of the first output line 241a and the first output repair line 222a. . That is, a rectangular protrusion is formed on one side of the first output line 241a integrally with the first output line 241a, and a rectangular protrusion is formed on the other side of the first output line 241a. do. Protruding portions alternately formed at one side and the other side of each of the first output lines 241a are formed to be positioned at one side and the other side of the first output repair line 222a so that the first welding points 401a to 401c are formed. It is formed in a diagonal step shape. Accordingly, the first output repair line 222a also has a rectangular protrusion formed on one side of the first output repair line 222a similarly to the protrusion formed on the first output line 241a, and the first output repair line 222a is formed. The other side of the line 222a is formed with a rectangular protrusion. Protruding portions alternately formed on one side and the other side of the first output repair line 222a are positioned at one side and the other side of the first output line 241a, respectively, and thus formed at one side and the other side of the first output line 241a. The first welding points 401a to 401c are formed in a stepped shape in a diagonal direction by being configured to overlap with the protrusions.

In addition, second welding points 402a to 402c are formed in a stepped shape in a diagonal direction at the intersection of the first output line 241a and the second output repair line 222b. That is, a rectangular protrusion is formed at one side of the first output line 241a, and a rectangular protrusion is formed at the other side of the first output line 241a. Protruding portions alternately formed on one side and the other side of each of the first output lines 241a are formed to be alternately positioned on one side and the other side of the second output repair line 222b to form the second welding points 401a to 401c. ) Is formed in a diagonal step shape. Accordingly, the second output repair line 222b also has a rectangular protrusion formed on one side of the second output repair line 222b, similarly to the first output line 241a, and the second output repair line 222b. The other side of) is formed with a rectangular protrusion. Protruding portions alternately formed on one side and the other side of the second output repair line 222b are formed to be alternately positioned on one side and the other side of the first output line 241a and thus one side of the first output line 241a. The second welding points 402a to 402c are formed in a stepped shape in a diagonal direction by overlapping with protrusions alternately formed on the other side.

 In addition, third welding points 403a to 403c may be formed in a stepped shape in a diagonal direction at an intersection portion of the first output line 241a and the third output repair line 222c. That is, a rectangular protrusion is formed at one side of the first output line 241a, and a rectangular protrusion is formed at the other side of the first output line 241a. Protruding portions alternately formed on one side and the other side of each of the first output lines 241a are formed to be alternately positioned on one side and the other side of the third output repair line 222c to form the third welding points 403a to 403c. ) Is formed in a diagonal step shape. Therefore, the third output repair line 222c also has a rectangular protrusion formed on one side of the third output repair line 222c similarly to the first output line 241a, and the third output repair line 222c. The other side of) is formed with a rectangular protrusion. Protruding portions alternately formed on one side and the other side of the second output repair line 222b are formed to be located on one side and the other side of the first output line 241a and on one side and the other side of the first output line 241a. By being configured to overlap with the alternately formed protrusions, the third welding point (403a to 403c) is formed so that it can be formed in a stepped shape in the diagonal direction.

 The first, second, and third welding points 401a to 401c, 402a to 402c, and 403a to 403c may be formed through a deposition and etching process, although not shown, the first output line 241a and the An interlayer insulating film, a protective film, or the like is formed between the first, second, and third output repair lines 222a, 222b, and 222c. Therefore, laser welding is performed to connect the first output line 241a and the first, second, and third output repair lines 222a, 222b, and 222c by irradiating a laser beam to burn the interlayer insulating film or the protective film. Although the first welding point 401a is not electrically connected to the first and second welding points 401b to 401c by performing laser welding, the first output line 241a and the first, second, and Third output repair lines 222a, 222b, and 222c may be connected.

FIG. 5 is a diagram for describing another configuration of the welding point illustrated in FIG. 4 in detail.

As shown in FIG. 5, the welding point may be formed in a direction perpendicular to the diagonal direction of the welding point illustrated in FIG. 4. That is, first welding points 501a to 501c are formed at the intersections of the first output line 241a and the first output repair line 222a with the first welding points 401a to 401c illustrated in FIG. 4. It is formed in the vertical direction.

In addition, second welding points 502a to 502c may be formed in a stepped shape in a diagonal direction at an intersection portion of the first output line 241a and the second output repair line 222b. Third welding points 503a to 503c may be formed in a stepped shape in a diagonal direction at the intersection of 241a and the third output repair line 222c.

 Therefore, even when the connection fails at the first welding point 501a when the laser welding is performed to connect the first output line 241a and the first, second and third output repair lines 222a, 222b, and 222c. By performing laser welding on the second and third welding points 501b to 501c, the first output line 241a and the first, second, and third output repair lines 222a, 222b, and 222c may be connected to each other. .

The welding points 501a to 503c are deposited in a stepped manner in a diagonal direction on portions where the output lines 241a and the first, second and third output repair lines 222a, 222b and 222c cross each other. And etching process. The output line 241a and the first, second, and third output repair lines 222a, 222b, and 222c may include copper (Cu), aluminum (Al), aluminum alloy (AlNd), molybdenum (Mo), and chromium ( It is formed of one of the low resistance materials such as Cr), titanium (Ti), tantalum (Ta), or molybdenum-tungsten (MoW) or a mixture of the materials.

FIG. 6 is a diagram for describing another configuration of the welding point illustrated in FIG. 4 in detail.

As shown in FIG. 6, the first welding points 601a to 601c may be formed at the intersections of the first output line 241a and the first output repair line 222a of the first output repair line 222a. It may be formed to have two protrusions from one side. That is, a rectangular protrusion is formed at one side of the first output line 241a integrally with the first output line 241a, and a rectangular protrusion is formed at the other side of the first output line 241a. . Protrusions formed on one side and the other side of each of the first output line 241a are formed to be located on one side of the first output repair line 222a to form the first welding points 601a to 601c. Accordingly, the first output repair line 222a has two rectangular protrusions formed from one side of the first output repair line 222a. Two protrusions formed at one side of the first output repair line 222a are located at one side and the other side of the first output line 241a, and the protrusions formed at one side and the other side of the first output line 241a. The first welding points 601a to 601c are formed by overlapping each other.

In addition, as shown in FIG. 6, the second welding points 602a to 602c are connected to the second output repair line 222b at the intersection of the first output line 241a and the second output repair line 222b. It may be formed to have two protrusions from one side of). That is, a rectangular protrusion is formed at one side of the first output line 241a integrally with the first output line 241a, and a rectangular protrusion is formed at the other side of the first output line 241a. . Protrusions formed at one side and the other side of each of the first output lines 241a are formed to be located at one side of the second output repair line 222b to form the second welding points 602a to 602c. Accordingly, the second output repair line 222b has two rectangular protrusions formed from one side of the second output repair line 222b. Two protrusions formed at one side of the second output repair line 222b are located at one side and the other side of the first output line 241a, and the protrusions formed at one side and the other side of the first output line 241a. The second welding points 602a to 602c are formed by overlapping each other.

 In addition, as shown in FIG. 6, the third welding points 603a to 603c are formed at the intersection of the first output line 241a and the third output repair line 222c. It may be formed to have two protrusions from one side of). That is, a rectangular protrusion is formed at one side of the first output line 241a integrally with the first output line 241a, and a rectangular protrusion is formed at the other side of the first output line 241a. . Protrusions formed on one side and the other side of each of the first output line 241a are formed to be located on one side of the third output repair line 222c to form the third welding points 603a to 603c. Thus, the third output repair line 222b has two rectangular protrusions formed from one side of the third output repair line 222c. Two protrusions formed at one side of the third output repair line 222c are located at one side and the other side of the first output line 241a, and the protrusions formed at one side and the other side of the first output line 241a. The third welding points 603a to 603c are formed by overlapping each other.

 The first, second, and third welding points 601a to 601c, 602a to 602c, and 603a to 603c may be formed through a deposition and etching process, although not shown, the first output line 241a and the An interlayer insulating film, a protective film, or the like is formed between the first, second, and third output repair lines 222a, 222b, and 222c. Accordingly, laser welding for connecting the first output line 241a and the first, second and third output repair lines 222a, 222b, and 222c by irradiating a laser beam to burn the interlayer insulating film or the protective film. Even if the first welding point 601a is not electrically connected, the laser welding is performed on the second and third welding points 601b to 601c so that the first output line 241a and the first, second, and And third output repair lines 222a, 222b, and 222c.

Although not shown in the drawings, between the output line 241a and the first, second, and third output repair lines 222a, 222b, and 222c may be formed of silicon oxide or silicon nitride, which is an inorganic material having good insulation breakdown characteristics. An interlayer insulating film is formed. Although not shown on the first, second, and third output repair lines 222a, 222b, and 222c, a protective film may be formed of an organic insulating material such as silicon oxide, silicon nitride, BCB, or an acrylic material.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

The gate driving circuit according to the present invention as described above has the following effects.

The gate driving circuit according to the present invention forms at least two welding points in a plurality of wires formed to cross each other. Accordingly, the success rate may be increased during laser welding for connecting the plurality of wires. That is, by increasing the repair rate when the connection between the wirings is poor, the yield can be improved in the manufacturing process of the liquid crystal display.

Claims (43)

A shift register having at least one output line; At least one first protrusion protruding from one side of each output line; At least one output repair line arranged to intersect the output lines; And And at least one second protrusion protruding from one side of each of the output repair lines and overlapping the first protrusions. The method of claim 1, At least one third protrusion protruding from the other side of each output line; And And at least one fourth protrusion protruding from the other side of each of the output repair lines and overlapping the third protrusions. The method of claim 2, And each of the first and third protrusions formed in the output lines are alternately positioned with each other, and the second and fourth protrusions formed in the respective output repair lines are alternately positioned with each other. The method of claim 3, wherein And each of the first and third protrusions is formed in the vicinity of the intersection of the respective output lines and the respective output repair lines. The method of claim 4, wherein Wherein each of the first protrusions is located at one side of each of the output repair lines, and each of the third protrusions is located at the other side of each of the output repair lines. The method of claim 3, wherein And each of the second and fourth protrusions is formed in the vicinity of the intersection of the respective output lines and the respective output repair lines. The method of claim 6, Wherein each of the second protrusions is located at one side of each of the output lines, and each of the fourth protrusions is located at the other side of each of the output lines. The method of claim 3, wherein And each of the first and second protrusions overlapping each other is electrically connected to each other. The method of claim 3, wherein And the third and fourth protrusions overlapping each other are electrically connected to each other. The method of claim 3, wherein And at least one insulating film is formed between each of the output lines and each of the first and third protrusions, and each of the output repair lines and each of the second and fourth protrusions. The method of claim 10, And the insulating film is one of an interlayer insulating film and a protective film, or the interlayer insulating film and the protective film are sequentially formed. The method of claim 1, At least two clock transmission lines for transmitting at least two clock pulses having a phase difference; At least one third protrusion protruding from one side of each clock transmission line; At least one clock repair line arranged to intersect the clock transmission lines; And at least one fourth protrusion protruding from one side of each of the clock repair lines and overlapping the third protrusions formed in each of the clock transmission lines. The method of claim 12, At least one fifth protrusion protruding from the other side of each clock transmission line; And And at least one sixth protrusion protruding from the other side of each of the clock repair lines and overlapping the fifth protrusions. The method of claim 13, And the third and fifth protrusions formed in the clock transmission lines are alternately positioned with each other, and the fourth and sixth protrusions formed in the clock repair lines are alternately positioned with each other. . The method of claim 14, And the third and fifth protrusions are formed in the vicinity of the intersection of each clock transmission line and each of the clock repair lines. The method of claim 15, And wherein each of the third protrusions is located at one side of each clock repair line, and each of the fifth protrusions is located at the other side of each clock repair line. The method of claim 14, And each of the fourth and sixth protrusions is formed in the vicinity of the intersection of each clock transmission line and each clock repair line. The method of claim 17, Each of the fourth protrusions is located at one side of each clock transmission line, and each of the sixth protrusions is located at the other side of each clock transmission line. The method of claim 14, And the third and fourth protrusions overlapping each other are electrically connected to each other. The method of claim 14, And the fifth and sixth protrusions overlapping each other are electrically connected to each other. The method of claim 14, And at least one insulating film is formed between each clock transmission line, each of the third and fifth protrusions, and each of the clock repair line and each of the fourth and sixth protrusions. The method of claim 21, And the insulating film is one of an interlayer insulating film and a protective film, or the interlayer insulating film and the protective film are sequentially formed. The method of claim 1, At least one third protrusion protruding from the other side of each output line; And And at least one fourth protrusion protruding from one side of each of the output repair lines and overlapping the third protrusions. The method of claim 23, And each of the first and third protrusions is formed in the vicinity of the intersection of the respective output lines and the respective output repair lines. The method of claim 24, And each of the first and third protrusions is located at one side of each of the output repair lines. The method of claim 23, And each of the second and fourth protrusions is formed in the vicinity of the intersection of the respective output lines and the respective output repair lines. The method of claim 26, Wherein each of the second protrusions is located at one side of each of the output lines, and each of the fourth protrusions is located at the other side of each of the output lines. The method of claim 23, And each of the first and second protrusions overlapping each other is electrically connected to each other. The method of claim 23, And the third and fourth protrusions overlapping each other are electrically connected to each other. The method of claim 23, And at least one insulating film is formed between each of the output lines and each of the first and third protrusions, and each of the output repair lines and each of the second and fourth protrusions. The method of claim 30, And the insulating film is one of an interlayer insulating film and a protective film, or the interlayer insulating film and the protective film are sequentially formed. The method of claim 12, At least one fifth protrusion protruding from the other side of each clock transmission line; And And at least one sixth protrusion protruding from one side of each of the clock repair lines and overlapping each of the fifth protrusions. The method of claim 32, And the third and fifth protrusions are formed in the vicinity of the intersection of each clock transmission line and each of the clock repair lines. The method of claim 33, wherein And wherein each of the third protrusions is located at one side of each clock repair line, and each of the fifth protrusions is located at the other side of each clock repair line. The method of claim 32, And each of the fourth and sixth protrusions is formed in the vicinity of the intersection of each clock transmission line and each clock repair line. 36. The method of claim 35 wherein And each of the fourth and sixth protrusions is located at one side of each clock transmission line. The method of claim 32, And the third and fourth protrusions overlapping each other are electrically connected to each other. The method of claim 32, And the fifth and sixth protrusions overlapping each other are electrically connected to each other. The method of claim 32, And at least one insulating film is formed between each clock transmission line, each of the third and fifth protrusions, and each of the clock repair line and each of the fourth and sixth protrusions. A shift register having at least one output line, at least one first protrusion protruding from one side of each output line, at least one output repair line arranged to intersect the output lines, and each output repair In the repairing method of the gate driving circuit, characterized in that it comprises at least one second protrusion protruding from one side of the line, overlapping with each of the first protrusions, Performing a welding process at an intersection between each output line and each output repair line; Confirming that each intersection is electrically connected; And And electrically connecting the first and second protrusions to each other according to the verification result. The method of claim 40, The welding process is a repair method of a gate driving circuit, characterized in that for irradiating a laser beam and electrically connected to each other. 42. The method of claim 41 wherein The first and second protrusions overlapping each other are electrically connected to each other through a welding process. The method of claim 40, And electrically connecting the first and second protrusions to each other is performed when the intersections are not electrically connected to each other.

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