CN101718933B - LCD (Liquid Crystal Display) panel and repair circuit thereof - Google Patents

Abstract

The invention provides a liquid crystal display panel repairing circuit, comprising: a data line repairing line, a scanning line repairing line, a surrounding line, a connecting line, a first conductive layer, a second conductive layer and a welded conductive layer . The data line repair line and the scan line repair line respectively have floating insulation across one end of the data line and the scan line. The surrounding line surrounds the liquid crystal display panel and is floating and insulated across the other end of the scanning line and the data line, and the surrounding line partially overlaps the scanning line repairing line and is electrically insulated. One end of the connecting wire partially overlaps with the repairing wire of the data line and is electrically insulated, and the other end of the connecting wire is electrically connected to the first conductive layer. The welded conductive layer is located at the other end of the surrounding wire, partially overlaps with the first conductive layer and the second conductive layer and is electrically insulated. By adopting the repairing circuit of the liquid crystal display panel in the present invention, the repairability of defective data lines or defective scanning lines can be realized, and the scrap rate of products can be greatly reduced.

Description

A liquid crystal display panel and its repair circuit

technical field

The invention relates to a liquid crystal display panel, in particular to a liquid crystal display panel with a data line repair line and a scan line repair line and a repair circuit thereof.

Background technique

With the development of semiconductor devices and display manufacturing technologies, liquid crystal display panels with superior performance such as high image quality, low power consumption, and low radiation have gradually become the mainstream of the market. Typically, a liquid crystal display panel includes an array substrate, a color filter substrate and a liquid crystal layer located between the array substrate and the color filter substrate. Generally, the color filter substrate is called an upper glass substrate, and the array substrate is called a lower glass substrate.

On the lower glass substrate, a plurality of scanning lines, a plurality of data lines and a plurality of pixel circuits are formed. Wherein, each pixel circuit is defined at the intersection of a scanning line and a corresponding data line, each pixel receives a scanning signal through a corresponding scanning line, and receives a pixel voltage through a corresponding data line, so that based on these scanning lines, The data lines and pixel circuits form a display area on the lower glass substrate. In addition, a plurality of repair lines (rescue lines) can also be set on the lower glass substrate, and some of these repair lines are formed on the lower glass substrate, and the other part overlaps with these data lines, that is, the repair lines and the data lines are partly above and below each other. staggered and electrically insulated from each other. When the data line is disconnected due to a defect, a laser is used to weld the interlaced overlap between the repair line and the data line (also known as laser welding method: Laser Welding) to form an electrical connection. In this sense, the repair line can be used as a substitute for a defective data line, and the scrap rate can be greatly reduced by transferring the control signal from the repair line to the corresponding pixel to display the image normally.

However, in the current liquid crystal display panel, most of the repairing circuits are designed only for the defects of the data lines on the lower glass substrate, but cannot repair the defects of the scanning lines. Therefore, when one or more defective scanning lines cannot normally receive scanning signals, the repairing circuit is powerless.

Contents of the invention

In view of the above-mentioned technical defects in the repairing circuit of the liquid crystal display panel in the prior art, the present invention provides a liquid crystal display panel with a data line repairing line and a scanning line repairing line and its repairing circuit.

According to an embodiment of the present invention, a liquid crystal display panel repair circuit is provided. The repairing circuit at least includes: a data line repairing line, a scanning line repairing line, a surrounding line, a connection line, a first conductive layer, a second conductive layer and a welded conductive layer. The floating insulation of the repairing line of the data line spans one end of the data line, and the floating insulation of the repairing line of the scanning line spans one end of the scanning line. The surrounding line surrounds the liquid crystal display panel and is floating and insulated across the other end of the scanning line and the data line, and the surrounding line partially overlaps the scanning line repairing line and is electrically insulated. One end of the connecting wire partially overlaps and is electrically insulated from the repairing wire of the data line, and the other end of the connecting wire is electrically coupled to the first conductive layer. More specifically, the other end of the connecting wire is first electrically connected to the input end of the operational amplifier , and then electrically connected to the first conductive layer through the output terminal of the operational amplifier. In addition, the welded conductive layer is located at the other end of the surrounding wire, partially overlaps with the first conductive layer and the second conductive layer and is electrically insulated.

Preferably, a first potential amplifier is further included between the connection line and the first conductive layer. Wherein, the input end of the first potential amplifier is electrically connected to the other end of the connection line, and the output end of the first potential amplifier is electrically connected to the first conductive layer.

Preferably, a second potential amplifier is further included between the surrounding wire and the second conductive layer. Wherein, the input end of the second potential amplifier is electrically connected to the second conductive layer, and the output end of the second potential amplifier is electrically connected to one end of the surrounding wire.

Preferably, the repair circuit further includes an insulating layer located on or under the other end of the surrounding wire, the first conductive layer and the second conductive layer. Correspondingly, the fused conductive layer is located above or below the insulating layer.

According to yet another embodiment of the present invention, a repaired liquid crystal display panel is provided. The liquid crystal display panel includes: a data line repair line, a scanning line repair line, a first conductive layer, a surrounding line, a second conductive layer, a welded conductive layer and an insulating layer. The data line repairing line is set across one end of the multiple data lines, and is only electrically connected to one of the multiple data lines. The scan line repair line floating insulation spans one end of the scan line. The surrounding wire surrounds the liquid crystal display panel and is electrically connected with the other end of the data line electrically connected to the data line repairing wire, and the surrounding wire partially overlaps with the scanning line repairing line and is electrically insulated. The first conductive layer is electrically connected to the repairing wire of the data line, and the second conductive layer is electrically connected to one end of the surrounding wire. The welded conductive layer partially overlaps the other end of the surrounding wire, the first conductive layer and the second conductive layer, and is electrically connected to the other end of the surrounding wire and the first conductive layer. In addition, an insulating layer is located between the other end of the surrounding wire, the first conductive layer and the second conductive layer, and the welded conductive layer.

Preferably, one of the data lines is a defective data line. According to an embodiment, the first pre-repair point is laser welded to electrically connect the repaired data line and the defective data line. The second pre-repair point is welded by laser to electrically connect the surrounding wire and the other end of the defective data wire. The third pre-repair point is laser welded to electrically connect the welded conductive layer and the other end of the surrounding wire, and the fourth pre-repair point is laser welded to electrically connect the welded conductive layer to the first conductive layer.

Preferably, the liquid crystal display panel further includes a connection line for electrically connecting the first conductive layer and the data line repair line. In addition, a fifth pre-repair point is further included, and the fifth pre-repair point is welded by laser to electrically connect the data line repair line and the connection line.

Preferably, a potential amplifier is further included between the first conductive layer and the data line repair line. The input end of the potential amplifier is electrically connected to the data line repair line, and the output end of the potential amplifier is electrically connected to the first conductive layer.

According to yet another embodiment of the present invention, a repaired liquid crystal display panel is provided. The liquid crystal display panel includes: a scanning line repairing line, a data line repairing line, a connection line, a surrounding line, a first conductive layer, a second conductive layer, a welded conductive layer and an insulating layer. The scan line repair line is arranged across one end of the scan lines, and is only electrically connected to one of the scan lines. The data line repair line floating insulation spans one end of the data line. The surrounding wire surrounds the liquid crystal display panel, and is electrically connected with the other end of the scan line electrically connected with the scan line repair line, and is electrically connected with the scan line repair line. One end of the connection wire overlaps with the data line repair wire and is electrically insulated, and the other end of the connection wire is electrically connected to the first conductive layer. The second conductive layer is electrically connected to one end of the surrounding wire, and the welded conductive layer partially overlaps the other end of the surrounding wire, the first conductive layer and the second conductive layer, and electrically connects the other end of the surrounding wire to the second conductive layer . The insulating layer is located between the other end of the surrounding wire, the first conductive layer, the second conductive layer and the welded conductive layer.

Preferably, one of the plurality of scan lines is a scan line with a defect. According to an embodiment, the first pre-repair point is laser welded to electrically connect the scan line repair line and the defective scan line. The second pre-repair point is laser welded to electrically connect the surrounding line with the other end of the defective scan line. The third pre-repair point is laser welded to electrically connect the surrounding line and the scan line repair line. The fourth pre-repair point is laser welded to electrically connect the welded conductive layer and the other end of the surrounding wire, and the fifth pre-repair point is laser welded to electrically connect the welded conductive layer to the second conductive layer.

Preferably, a potential amplifier is further included between the surrounding wire and the second conductive layer.

By adopting the repairing circuit of the liquid crystal display panel in the present invention, not only the repairability of the electrical failure of the defective data line can be realized, but also the repairability of the electrical failure of the defective scanning line can be realized, thereby reducing the scrap rate of products. In addition, when repairing a data line or a scan line, the repair circuit realizes the bidirectional function of a single line by using a switching component.

Description of drawings

Readers will have a clearer understanding of various aspects of the present invention after reading the detailed description of the present invention with reference to the accompanying drawings. in,

FIG. 1 shows a schematic diagram of the principle of a repair circuit for repairing data lines in a liquid crystal display panel in the prior art;

FIG. 2 shows a schematic structural view of a liquid crystal display panel with repair lines for data lines and repair lines for scan lines according to one aspect of the present invention;

3 shows a schematic diagram of the positional relationship between the first conductive layer, the second conductive layer and the welded conductive layer in the switching device of FIG. 2;

FIG. 4 shows a schematic diagram of the loop direction of the repair circuit on the liquid crystal display panel in FIG. 2 for repairing the data line; and

FIG. 5 is a schematic diagram showing the circuit direction of the repairing circuit on the liquid crystal display panel in FIG. 2 for repairing scan lines.

[Description of main component symbols]

100: Surrounding line 400: Surrounding line

102: Data line 402: Data line breakpoint

104: Scanning line 404: Data line repair line

106: Scan line breakpoint 406: Connecting line

108: Scan line repair line 408: Switch component

110: Operational amplifier 410: Potential amplifier

112: Pre-repair point 412: Potential amplifier

114: Partial overlapping area 414: Pre-patched point

116: Connection point 416: Pre-patched point

200: Surrounding line 418: Pre-patched point

202: Data line 420: Pre-patched point

204: Scanning line 422: Pre-patched point

206: Data cable repair line 500: Surrounding line

208: Connecting line 502: Scanning line breakpoint

210: Operational amplifier 504: Scan line repair line

212: Switch component 506: Switch component

214: Scanning line repair line 508: Potential amplifier

30: Welding conductive layer 510: Potential amplifier

32: Intermediate insulating layer 512: Pre-repair point

34: Metal layer 514: Pre-repair point

36: The first conductive layer 516: Pre-repair point

38: Second conductive layer 518: Pre-repair point

300: pre-repair point 520: pre-repair point

302: Pre-patched point

304: Pre-patched point

306: Pre-patched point

Detailed ways

The specific implementation manners of the present invention will be described in further detail below with reference to the accompanying drawings. Throughout the description, like reference numerals refer to like parts. It should be understood that in the drawings of this application, the "solid lines" and "dotted lines" used to electrically connect a certain component with another component are only for the convenience of describing specific embodiments of the present invention, and are not intended to induce It will be understood by those skilled in the art that solid lines indicate electrical connection and dashed lines indicate electrical isolation. It should also be understood that in the following description, "first", "second", and "third" are only for the convenience of describing specific embodiments of the present invention and to distinguish the functions of components of the same type, and do not constitute a reference to the present application. to restrict or limit.

FIG. 1 shows a schematic diagram of a repair circuit used for repairing data lines in a liquid crystal display panel in the prior art. In Fig. 1, the repair circuit of the liquid crystal display panel at least includes: a surrounding line 100, a plurality of data lines 102, a plurality of scanning lines 104, a data line breakpoint (data line open) 106, a plurality of data line repair lines 108, amplifier 110 and pre-patched point 112 . It should be pointed out that the pre-repair point 112 is located in the partially overlapping area between any one of the plurality of data lines 102 and the surrounding line 100 on the liquid crystal display panel. In general, although the pre-repair point 112 is located in the partial overlapping area of the two, the data line 102 is electrically insulated from the surrounding line 100. The surrounding wire 100 is electrically connected.

The surrounding wire 100 surrounds the liquid crystal display panel, and the floating insulation crosses one end of the plurality of data lines 102 . The surrounding wire 100 partially overlaps with the data line repairing line 108 and is electrically insulated. In addition, the data line repair line 108 is floating and insulated across the other end of the corresponding data line 102 . When a certain data line in the plurality of data lines 102 has an electrical fault, the partial overlapping area 114 of the surrounding line 100 and the data line repair line 108 is welded, so that the data line repair line 108 replaces the defective data line to receive the display. unit's pixel voltage and display the image. After the data line with the breakpoint 106 is repaired by the data line repair line 108, the flow of its repair circuit can be represented by arrows according to FIG. line repair line 108, and then the data line repair line 108 is electrically connected to the surrounding line 100 through the partial overlapping area 114 of the surrounding line 100 and the data line repairing line 108. The above-mentioned electrical connection method can adopt laser welding (laser welding ). The surround line may further include an amplifier 110 so that the signal will not be attenuated too much when the signal is transmitted to the other end of the data line with the break point 106 via the data line repair line 108 and the surround line 100 . Finally, the surrounding line 100 is electrically connected to the other end of the data line with the break point 106 through the pre-repair point 112 welded by laser, so as to realize the repair function of the data line.

It can be seen from the above description that if a defective data line occurs in the liquid crystal display panel in the prior art, normal image display can be realized through the surrounding line around the outer edge of the panel and the data line repair line. However, the repair circuit of the display panel only solves the problem of signal transmission when the data line has an electrical fault, but does not involve the problem of repairing the defective scan line. In this way, if the liquid crystal display panel is electrically disconnected when the scanning signal is transmitted to the thin film transistor at the pixel through the scanning line, the repair circuit on the panel cannot solve the problem.

In order to solve the technical defects in the liquid crystal display panel shown in FIG. 1 , FIG. 2 shows an embodiment of the present invention, a schematic structural diagram of a liquid crystal display panel with data line repair lines and scan line repair lines. Using the repairing circuit on the liquid crystal display panel of FIG. 2 can not only repair the data lines on the glass substrate, but also repair the scanning lines on the glass substrate.

In more detail, the repairing circuit of the liquid crystal display panel in FIG. A switch component 212 and a plurality of scan line repair lines 214 .

The surrounding wire 200 surrounds the liquid crystal display panel, and the floating insulation crosses one end of the plurality of data lines 202 , and a part of the surrounding wire 200 partially overlaps with the plurality of scan line repair lines 214 and is electrically insulated. In addition, one end of the connection wire 208 partially overlaps and is electrically insulated from the data line repair wire 206 , and the other end of the connection wire 208 is electrically connected to the switching component 212 .

It should be pointed out that, in FIG. 2 , the scan line repair line 214 is floating and insulated across one end of the plurality of scan lines 204, the data line repair line 206 is floating and insulated at one end of the plurality of data lines 202, and a part of the surrounding line 200 is in contact with The scan line repair line 214 partially overlaps and is electrically insulated, and one end of the connection line 208 partially overlaps with the data line repair line 206 and is electrically insulated. When the liquid crystal display panel requires repairing one or more data lines by repairing the circuit, laser welding can be used to weld the overlapping area of the data line repair line 206 and the defective data line 202 as well as the connection line 208 and the data line repair line 206 The overlapping area, and then use the electrical switching on the switching component 212 to form an electrical path between the surrounding line 200 and the data line repair line 206; similarly, when the liquid crystal display panel requires repairing one or more When scanning lines 204, laser welding can be used to weld the overlapping area of the scanning line repair line 214 and the defective scanning line 204 and the overlapping area of the surrounding line 200 and the scanning line repairing line 214, and then use the electrical properties on the switching component 212 Switching forms an electrical path between the surrounding line 200 and the scan line repair line 214 .

In FIG. 2 , the amplifier 210 includes a first amplifier and a second amplifier, wherein the first amplifier is used for electrically connecting the switching component 212 and the connection line 208 , and the second amplifier is used for electrically connecting the surrounding line 200 and the switching component 212 . When the repairing circuit performs a repair operation to eliminate the electrical defect of the data line, the connection line 208 is electrically connected to the positive input terminal of the first amplifier (indicated by the symbol "+"), and the output terminal of the first amplifier (indicated by the symbol " -" mark) is electrically connected to the surrounding line 200 through the switching element 212; similarly, when the repair circuit performs a repair operation to eliminate the electrical defect on the scanning line, one end of the surrounding line 200 is electrically connected to the first end of the surrounding line 200 through the switching element 212. The positive input terminal of the second amplifier (marked with a symbol “+”), and the output terminal of the second amplifier (marked with a symbol “−”) are electrically connected to the other end of the surrounding wire 200 .

It can be seen from the above that the switching component 212 in FIG. 2 is one of the important components for repairing the scan line or the data line. That is to say, the switching component can not only electrically connect the surround wire and the scan line repair wire, but also electrically connect the surround wire and the data wire repair wire. In order to describe the internal structure of the switching assembly more clearly, FIG. 3 shows a schematic diagram of the positional relationship among the first conductive layer, the second conductive layer and the welded conductive layer in the switching assembly of FIG. 2 .

In FIG. 3 , the switch assembly 212 at least includes a welded conductive layer 30 , an intermediate insulating layer 32 , a metal layer 34 electrically connected to one end of the surrounding wire, a first conductive layer 36 and a second conductive layer 38 . Wherein, the first conductive layer 36 is electrically connected to one end of the connecting wire, and the second conductive layer 38 is electrically connected to the other end of the surrounding wire. In one of the embodiments, a first potential amplifier is further included between the connection line and the first conductive layer 36, wherein the positive input terminal of the first potential amplifier is electrically connected to one end of the connection line, and the output terminal of the first potential amplifier is electrically connected to the first potential amplifier. connected to the first conductive layer 36. In one of the embodiments, a second potential amplifier is further included between the surrounding wire and the second conductive layer 38, wherein the positive input terminal of the second potential amplifier is electrically connected to the second conductive layer 38, and the output terminal of the second potential amplifier is electrically connected to the second potential amplifier. Connect the other end of this loop wire. Those skilled in the art should understand that the first potential amplifier and the second potential amplifier may adopt a circuit design of a single operational amplifier, or may adopt a circuit design of a dual operational amplifier. For example, when the scanning voltage of the scanning line is different from the pixel voltage reference of the data line, the first and second potential amplifiers in the switching component adopt a double operational amplifier design. For example, when using a single operational amplifier design, the supply voltage of the operational amplifier must be greater than the maximum of the scan voltage and the pixel voltage.

Those of ordinary skill in the art should also understand that the intermediate insulating layer 32 is located between the fused conductive layer 30 and the first conductive layer 36 or the second conductive layer 38, therefore, the insulating layer 32 can be located between the first conductive layer 36 or the second conductive layer 38. layer 38 and, correspondingly, the fused conductive layer 30 should be located above or below the insulating layer 32 .

In FIG. 3 , the pre-repair points 300 and 302 are located in the partial overlapping area of the welded conductive layer 30 and the metal layer 34 electrically connected to one end of the surrounding wire, and the pre-repair point 304 is located at the welded conductive layer 30 and the second conductive layer 38. The partially overlapping area, and the pre-repair point 306 is located in the partially overlapping area of the welded conductive layer 30 and the first conductive layer 36 . It is not difficult to see that the laser welding pre-repair point 300 or 302 can electrically connect the metal layer 34 and the welded conductive layer 30, and the laser welded pre-repair point 304 can electrically connect the welded conductive layer 30 and the second conductive layer 38, and the laser welding pre-repair point 304 can electrically connect the welded conductive layer 30 and the second conductive layer 38. The shot welding pre-repair point 306 can electrically connect the welding conductive layer 30 and the first conductive layer 36 . Moreover, when the laser welding pre-repair points 300 and 304, the repair circuit of the liquid crystal display panel is used to repair the electrical failure of the scan line. When laser welding the pre-repair points 302 and 306, the repair circuit of the liquid crystal display panel is used to repair the electrical fault of the data line. Those of ordinary skill in the art should also understand that when laser welding the pre-repair points 302 and 306, one end of the surrounding wire electrically connected to the metal layer 34 has been electrically connected to the data line repair wire, and at this time, no further lightning Injection welding pre-repair points 300 and 304. This is because the welded conductive layer 30 can only be electrically connected to the data line repair line or the scan line repair line at the same time. In order to respectively illustrate the circuit flow of the repair circuit in the liquid crystal display panel to perform data line repair and scan line repair, FIG. 4 shows a schematic diagram of the circuit direction of the repair circuit on the liquid crystal display panel in FIG. 2 for repairing data lines, and FIG. 5 shows A schematic diagram of the circuit direction of the repairing circuit on the liquid crystal display panel in FIG. 2 for repairing the scanning lines is shown. In FIGS. 4 and 5 , the arrows schematically indicate the direction of the circuit loop.

It should be noted that the repairing circuits in FIG. 4 and FIG. 5 only schematically describe the circuit principle of repairing data lines and scanning lines according to an embodiment of the present invention, but the purpose of the present invention is not limited thereto. In FIG. 4 , the repairing circuit at least includes a surrounding line 400 , a data line break 402 , a plurality of data line repairing lines 404 , connecting lines 406 , switching components 408 , potential amplifiers 410 and potential amplifiers 412 . In one embodiment, the switching component 408 corresponds to the switching component 212 in FIG. 2 , and its internal structure corresponds to the positional relationship among the metal layer 34 , the first conductive layer 36 and the second conductive layer 38 in FIG. 3 .

When an electrical fault occurs on one of the multiple data lines, firstly, the laser is welded to the pre-repair point 414 to electrically connect the data line repair line 404 to one end of the defective data line, and then the laser is welded to the defective data line. The pre-repair point 416 is used to electrically connect the surrounding line 400 with the other end of the defective data line. At the same time, laser welding is performed on the pre-repair point 418 to electrically connect the data line repair line 404 and the connection line 406 . Finally, in the switch assembly 408, laser welding is performed on the pre-repair point 420 to electrically connect the welded conductive layer 30 and the first conductive layer 36, and laser welding is performed on the pre-repair point 422 to electrically connect the welded conductive layer 30 to the metal Layer 34. According to an embodiment of the present invention, the pre-repair point 420 corresponds to the pre-repair point 306 in FIG. 3 , and the pre-repair point 422 corresponds to the pre-repair point 302 in FIG. 3 . It is worth mentioning that the method of electrically connecting two line segments or two conductive layers at each pre-repair point here is laser welding, but it is not limited thereto. After performing the above operations, the circuit loop of repairing the data line can be described as, one end of the defective data line is electrically connected to the switching component 408 through the data line repair line 404 and the connecting line 406, and is electrically connected to the surrounding line through the switching component 408 400, finally electrically connect to the other end of the defective data line through the pre-repair point 416 after laser welding. In one embodiment of the present invention, the potential amplifier 410 is arranged between the switching component 408 and the data line repairing line 404, its input terminal is electrically connected to the data line repairing line 404, and its output terminal is electrically connected to the switching component 408.

After understanding the repairing circuit for repairing the data line in FIG. 4, the repairing circuit for repairing the scan line will become easy. In FIG. 5 , the repair circuit at least includes a surrounding line 500 , a scan line break 502 , a plurality of scan line repair lines 504 , a switching component 506 , a potential amplifier 508 and a potential amplifier 510 . In one embodiment, the switching component 506 corresponds to the switching component 212 in FIG. 2 and the switching component 408 in FIG. 4 , and its internal structure corresponds to the metal layer 34 , the first conductive layer 36 and the second conductive layer in FIG. 3 38 positional relationship between.

When an electrical failure occurs in one of the multiple scan lines, firstly, the laser is welded to the pre-repair point 512 to electrically connect the scan line repair line 504 and one end of the defective scan line, and then the laser is welded to the defective scan line. The pre-repair point 514 is used to electrically connect the surrounding line 500 with the other end of the defective scan line. At the same time, laser welding is performed on the pre-repair point 516 to electrically connect the scan line repair line 504 and the surrounding line 500 . Finally, in the switch assembly 506, laser welding is performed on the pre-repair point 518 to electrically connect the welded conductive layer 30 and the metal layer 34, and laser welding is performed on the pre-repair point 520 to electrically connect the welded conductive layer 30 to the second conductive layer 34. Layer 38. According to an embodiment of the present invention, the pre-repair point 518 corresponds to the pre-repair point 300 in FIG. 3 , and the pre-repair point 520 corresponds to the pre-repair point 304 in FIG. 3 . After performing the above operations, the circuit loop for repairing the scanning line can be expressed as, one end of the defective scanning line is electrically connected to the switching element 506 through the scanning line repairing line 504 and the surrounding line 500, and is electrically connected to the surrounding line through the switching element 506 The other end of 500 is finally electrically connected to the other end of the defect scanning line through the pre-repair point 514 after laser welding. It is worth mentioning that the method of electrically connecting two line segments or two conductive layers at each pre-repair point here may be laser welding (laser welding), but it is not limited thereto. In one embodiment of the present invention, the potential amplifier 510 is disposed between the switching element 506 and the surrounding wire 500 , its input end is electrically connected to the switching element 506 , and its output end is electrically connected to the other end of the surrounding wire 500 .

By adopting the repairing circuit of the liquid crystal display panel in the present invention, not only the repairability of the electrical failure of the defective data line can be realized, but also the repairability of the electrical failure of the defective scanning line can be realized, thereby reducing the scrap rate of products. In addition, when repairing a data line or a scan line, the repair circuit realizes the bidirectional function of a single line by using a switching component.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that without departing from the spirit and scope of the present invention, various changes and substitutions can be made to the specific embodiments of the present invention. These changes and substitutions all fall within the scope defined by the claims of the present invention.

Claims (23)

1. The liquid crystal display panel repairing circuit is characterized by comprising the following components:

a data line repair line having a floating insulation crossing one end of the data line;

a scanning line repair line having a floating insulation crossing one end of the scanning line;

a surrounding wire surrounding the liquid crystal display panel and crossing the other end of the scanning wire and the other end of the data wire in a floating insulation manner, wherein the surrounding wire is partially overlapped with the scanning wire repairing wire and is electrically insulated;

a connection line having one end partially overlapped and electrically insulated with the data line repair line;

the first conducting layer is electrically connected with the other end of the connecting wire;

a second conductive layer electrically connected to one end of the surrounding line; and

and the welding conducting layer is positioned at the other end of the surrounding line, is overlapped with the first conducting layer and the second conducting layer and is electrically insulated.

2. The liquid crystal display panel repair circuit of claim 1, wherein the connection line and the first conductive layer further comprise a first potential amplifier.

3. The repairing circuit of claim 2, wherein an input terminal of the first potential amplifier is electrically connected to the other terminal of the connecting wire, and an output terminal of the first potential amplifier is electrically connected to the first conductive layer.

4. The LCD panel repair circuit of claim 2, wherein the surrounding line and the second conductive layer further comprise a second potential amplifier.

5. The LCD panel repair circuit of claim 4, wherein an input terminal of the second potential amplifier is electrically connected to the second conductive layer, and an output terminal of the second potential amplifier is electrically connected to one end of the surrounding line.

6. The liquid crystal display panel repair circuit of claim 1, further comprising an insulating layer on or under the other end of the surrounding line and the first and second conductive layers.

7. The liquid crystal display panel repair circuit of claim 6, wherein the insulating layer is located on the other end of the surrounding line, the first conductive layer and the second conductive layer and the frit conductive layer is located on the insulating layer, or the insulating layer is located under the other end of the surrounding line, the first conductive layer and the second conductive layer and the frit conductive layer is located under the insulating layer.

8. A repaired liquid crystal display panel, comprising:

a data line repair line crossing one end of the plurality of data lines and electrically connected to only one of the data lines;

a scanning line repair line, the floating insulation crosses one end of the scanning line;

the first conducting layer is electrically connected with the data line repairing line;

a surrounding wire surrounding the liquid crystal display panel and electrically connected to the other end of the data line electrically connected to the data line repair line, and the surrounding wire and the scan line repair line are partially overlapped and electrically insulated;

a second conductive layer electrically connected to one end of the surrounding line;

a welding conductive layer partially overlapped on the other end of the surrounding wire and above or below the first conductive layer and the second conductive layer; and

an insulating layer located on the other end of the surrounding line, the first conductive layer and the second conductive layer and the welding conductive layer located on the insulating layer, or the insulating layer located under the other end of the surrounding line, the first conductive layer and the second conductive layer and the welding conductive layer located under the insulating layer;

the welding conductive layer is electrically connected with the other end of the surrounding wire and the first conductive layer.

9. The repaired liquid crystal display panel of claim 8, wherein one of the data lines is a data line having a defect.

10. The repaired liquid crystal display panel of claim 9, wherein the first pre-repair spot is laser welded to electrically connect the data line repair line and the data line having the defect.

11. The repaired liquid crystal display panel of claim 10, wherein a second pre-repair spot is laser welded to electrically connect the surrounding line and the other end of the data line having the defect.

12. The repaired liquid crystal display panel of claim 11, wherein a third pre-repair point is laser welded to electrically connect the welded conductive layer and the other end of the surrounding line, and a fourth pre-repair point is laser welded to electrically connect the welded conductive layer and the first conductive layer.

13. The repaired liquid crystal display panel according to claim 12, further comprising a connecting wire for electrically connecting the first conductive layer and the data line repairing wire.

14. The repaired liquid crystal display panel of claim 13, further comprising a fifth pre-repair point, wherein the fifth pre-repair point is laser welded to electrically connect the data line repair line and the connection line.

15. The repaired LCD panel of claim 8, wherein the first conductive layer further comprises a potential amplifier between the data line repair line and the first conductive layer.

16. The repaired liquid crystal display panel of claim 15, wherein the input terminal of the potential amplifier is electrically connected to the data line repair line, and the output terminal of the potential amplifier is electrically connected to the first conductive layer.

17. A repaired liquid crystal display panel, comprising:

a scanning line repair line crossing one end of the plurality of scanning lines and electrically connected with only one of the scanning lines;

a data line repair line having a floating insulation crossing one end of the data line;

a connection line having one end overlapping and electrically insulated from the data line repair line;

the first conducting layer is electrically connected with the other end of the connecting wire;

a ring winding surrounding the liquid crystal display panel and electrically connected to the other end of the scanning line electrically connected to the scanning line repairing line and electrically connected to the scanning line repairing line;

a second conductive layer electrically connected to one end of the surrounding line;

a welding conductive layer partially overlapped on the other end of the surrounding wire and above or below the first conductive layer and the second conductive layer; and

an insulating layer located on the other end of the surrounding line, the first conductive layer and the second conductive layer and the welding conductive layer located on the insulating layer, or the insulating layer located under the other end of the surrounding line, the first conductive layer and the second conductive layer and the welding conductive layer located under the insulating layer;

wherein, the welding conductive layer is electrically connected with the other end of the surrounding wire and the second conductive layer.

18. The repaired liquid crystal display panel of claim 17, wherein one of the scan lines is a scan line having a defect.

19. The repaired liquid crystal display panel of claim 18, wherein the first pre-repair spot is laser welded to electrically connect the scan line repair line and the scan line having the defect.

20. The repaired liquid crystal display panel of claim 19, wherein a second pre-repair spot is laser welded to electrically connect the wrap-around line and the other end of the scan line having the defect.

21. The repaired liquid crystal display panel of claim 20, wherein the third pre-repair point is laser welded to electrically connect the surrounding line and the scan line repair line.

22. The repaired liquid crystal display panel of claim 21, wherein a fourth pre-repair spot is laser welded to electrically connect the welded conductive layer and the other end of the surrounding line, and a fifth pre-repair spot is laser welded to electrically connect the welded conductive layer and the second conductive layer.

23. The repaired liquid crystal display panel of claim 17, wherein the surrounding line and the second conductive layer further comprise a potential amplifier.

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