CN101261373A - Liquid crystal panel and method for repairing common electrode lines thereof - Google Patents

Abstract

The present invention relates to a method for repairing a common electrode line of a liquid crystal panel, which at least includes the following steps: firstly, inspecting the liquid crystal panel to find the broken line of the first common electrode line; then, cutting off a data line to form a jumper line, thereby The jumper crosses the first common electrode line and the second common electrode line adjacent to the first common electrode line; then, a laser welding process is performed to electrically connect the jumper line to the first common electrode line and the second common electrode line. In addition, the present invention also provides a structure of the repaired liquid crystal panel, so that no weak lines will be generated when the liquid crystal panel displays images, thereby improving the yield rate of the liquid crystal panel manufacture.

Description

Liquid crystal panel and method for repairing common electrode lines thereof

technical field

The invention relates to a liquid crystal panel and its repairing method, in particular to a repairing method of common electrode lines of the liquid crystal panel and the repaired liquid crystal panel.

Background technique

With the continuous increase of digital information and multimedia applications, as well as the promotion of the world's major display manufacturers, liquid crystal displays (LCDs) are rapidly penetrated into every family and individual, and human beings are very much looking forward to high-quality image displays. . From the traditional heavy cathode ray tube display (CRT) to the direction of thinner thickness, smaller size, lighter weight, better image quality, etc., these goals are also the mainstream trend of displays.

Since the liquid crystal panel has a plurality of common electrode lines electrically connected to a common electrode, it can be used to control the inversion of the liquid crystal. Wherein, the common electrode line cannot be designed to be too wide and there cannot be no common electrode line. If the common electrode line is designed to be too wide, the light transmittance will be affected. On the other hand, if the design of the common electrode line is too thin, it will often lead to disconnection, resulting in bad phenomena such as weak lines when displaying images on the LCD panel, resulting in scrapping.

In view of the defects in the above-mentioned existing liquid crystal panels and their repair methods, the inventor actively researches and innovates based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and cooperates with the application of academic theories, in order to create a The novel liquid crystal panel and its common electrode line repairing method can improve the general existing liquid crystal panel repairing method, making it more practical. Through continuous research, design, and after repeated trial samples and improvements, the present invention with practical value is finally created.

Contents of the invention

The main purpose of the present invention is to overcome the defects of the existing liquid crystal panel repair method, and provide a new type of liquid crystal panel and its common electrode line repair method. The technical problem to be solved is to make the liquid crystal panel display pictures no longer There are weak lines, very suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. According to a method for repairing common electrode lines of a liquid crystal panel proposed by the present invention, it includes the following steps: checking the liquid crystal panel to find a broken line of a first common electrode line; cutting off a data line to form a jumper, the jumper line across the first common electrode line and a second common electrode line adjacent to the first common electrode line; and performing a laser welding process to electrically connect the first common electrode line and the second common electrode line with the jumper wire Common electrode wire.

The purpose of the present invention and its technical problems can also be further realized by adopting the following technical measures.

The aforementioned method, wherein the step of cutting a data line to form a jumper includes: performing a laser cutting process to cut a part of the data line to form the jumper, wherein the jumper is electrically isolated from the data line the rest.

The aforementioned method further includes: performing the laser welding process to electrically connect the rest of the data line with a repair line.

In the aforementioned method, wherein the jumper line crosses the first common electrode line, a scan line and the second common electrode line.

The aforementioned method further includes: performing the laser welding process so that the scan line is electrically connected to a pixel electrode, wherein the pixel electrode is adjacent to the jumper line and crosses the second common electrode line.

The purpose of the present invention and the solution to its technical problems can also be realized by adopting the following technical solutions. A liquid crystal panel proposed according to the present invention, which includes: a first common electrode line having a disconnection; a second common electrode line adjacent to the first common electrode line; and a jumper electrically connected to the first common electrode line The first common electrode line and the second common electrode line.

In the aforementioned liquid crystal panel, the jumper is cut from a part of a data line, and the jumper is electrically isolated from the rest of the data line.

The aforementioned liquid crystal panel further includes: a repair line electrically connected to the rest of the data line.

In the aforementioned liquid crystal panel, the jumper line crosses the first common electrode line, a scanning line and the second common electrode line.

The aforementioned liquid crystal panel further includes: a pixel electrode electrically connected to the scan line, and the pixel electrode is adjacent to the jumper line.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. As can be seen from the above, in order to achieve the above purpose, the present invention provides a method for repairing the common electrode line of the liquid crystal panel, which at least includes the following steps: first, check the liquid crystal panel to find the broken line of the first common electrode line. Next, a data line is cut off to form a jumper, and the jumper crosses the first common electrode line and the second common electrode line adjacent to the first common electrode line. Next, a laser welding process is performed to electrically connect the jumper wires to the first common electrode line and the second common electrode line. Another object of the present invention is to provide a repaired liquid crystal panel, which at least includes a first common electrode line, a second common electrode line and a jumper line. Wherein the first common electrode line has a broken line, the second common electrode line is adjacent to the first common electrode line, and the jumper electrically connects the first common electrode line and the second common electrode line.

With the above technical solution, the liquid crystal panel and its common electrode line repairing method of the present invention have the following advantages and beneficial effects: the weak lines are eliminated when the liquid crystal panel displays images, thereby improving the yield rate of liquid crystal panel manufacture.

The present invention has the above-mentioned many advantages and practical value, and it has great improvement no matter in product structure, method or function, has significant progress in technology, and has produced easy-to-use and practical effects, and compared with existing The method for repairing the liquid crystal panel has enhanced outstanding effects, is more suitable for practical use, and has wide application value in the industry. It is a novel, progressive and practical new design.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a liquid crystal panel.

2A-2G are schematic circuit diagrams of a method for repairing a common electrode line of a liquid crystal panel according to an embodiment of the present invention.

100: LCD panel

110: weak line

210: the first common electrode line

220: second common electrode line

238: jumper

250: Repair line

270: Common potential source

212: Disconnection

230-233: data line

240-242: scan lines

260: pixel electrode

Detailed ways

In order to further explain the technical means and effects that the present invention takes to achieve the intended purpose of the invention, the specific implementation and structure of the liquid crystal panel and its common electrode line repair method proposed in the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , features and their effects are described in detail below. For convenience of description, in the following embodiments, the same elements are denoted by the same numbers.

Please refer to FIG. 1, which is a schematic diagram of a liquid crystal panel 100. If a common electrode line of the liquid crystal panel 100 is broken, when the liquid crystal panel 100 displays a picture, the common potential cannot be supplied to the common electrode line after the broken line. Therefore, a weak line 110 is displayed on the screen (or called the display area) 102 . It should be understood that in FIG. 1 , the line of weakness 110 appearing on the left side of the screen 102 is only for illustration, and is not used to limit the position where the line of weakness 110 appears. The line of weakness 110 may also appear on the right side of the screen 102 . Specifically, if the common electrode line on the right side of the broken line is electrically connected to the common potential source, the common potential provided by the common potential source cannot be supplied to the common electrode line on the left side of the broken line. Therefore, when the liquid crystal panel displays images, there will be a weak line 110 on the left side of the broken line, that is, the weak line 110 displayed on the left side of the screen 102 . On the other hand, if the common electrode line on the left side of the broken line is electrically connected to the common potential source, the common potential provided by the common potential source cannot be supplied to the common electrode line on the right side of the broken line. Therefore, when the liquid crystal panel displays images, there will be a weak line 110 on the right side of the broken line, that is, the weak line 110 will be displayed on the right side of the screen 102 .

In order to make the description of the present invention more detailed and complete, please refer to FIGS. 2A-2E , which are schematic circuit diagrams of a method for repairing common electrode lines of a liquid crystal panel according to an embodiment of the present invention. It should be understood that FIGS. 2A-2F are only Part of the circuit elements of the liquid crystal panel 100 , that is, well-known elements are not shown in FIGS. 2A-2F to avoid unnecessary limitations of the present invention.

As shown in FIG. 2A , the liquid crystal panel 100 has a plurality of data lines 230 - 233 , a plurality of scan lines 240 - 242 , a plurality of common electrode lines 210 , 220 and a common potential source 270 . Wherein the common electrode lines 210 , 220 are electrically connected to the common potential source 270 . If the first common electrode line 210 of the liquid crystal panel 100 has a broken line 212, the common electrode line 210 on the left side of the broken line 212 cannot be electrically connected to the common potential source 270, resulting in the common potential provided by the common potential source 270. The potential cannot be supplied to the first common electrode line 210 on the left side of the broken line 212 . Therefore, when the liquid crystal panel 100 displays images, the weak line 110 shown in FIG. 1 will be generated on the left side of the broken line 212 , that is, the weak line 110 displayed on the screen 102 .

When the liquid crystal panel 100 has weak lines when displaying images, the liquid crystal panel 100 can be checked to find a broken line 212 of the first common electrode line 210 . It should be noted that the disconnection 212 can be detected not only by the display screen, but also other methods can be used to obtain the disconnection, for example, detecting all common electrode lines separately. If the left and right ends of the first common electrode line 210 are in contact with the detection electrodes, and when the power is applied from the right end, but the required voltage cannot be obtained at the right end, it is determined that this common electrode line 210 has a broken line 212 . The above-mentioned place where the voltage is applied or the place where the voltage is obtained can also be reversed. Furthermore, the above inspection methods can also be used in combination. It should be understood that, in one embodiment, in FIG. 2A, the first common electrode line 210 on the right side of the broken line 212 is electrically connected to the common potential source 270, and the broken line 212 causes the common potential source 270 to provide The common potential cannot be supplied to the first common electrode line 210 on the left side of the broken line 212 . Or, in other embodiments, the first common electrode line 210 on the left side of the broken line 212 is electrically connected to the common potential source 270, and the broken line 212 prevents the common potential provided by the common potential source 270 from being supplied to the broken line. 212 on the right side of the first common electrode line 210 .

In order to allow the first common electrode line 210 on the left side of the broken line 212 to be electrically connected to the common potential source 270 again, please refer to FIG. The two sides of the line 212 are examples, but not limited thereto, and can also be located on the same side of the line break 212 . In this embodiment, the data line 231 is the closest data line to the broken line 212 . Next, cut the data line 231 to form a jumper line 238 . For example, a laser cutting process is performed to cut off a part of the data line 231, that is, to cut off the data line 231 from points a and b to form a jumper 238, wherein the jumper 238 is electrically connected to the rest of the data line 231. Isolation, that is, electrically isolating the part from point a to point b, and the jumper 238 needs to cross the first common electrode line 210, the scanning line 241 and the second common electrode line adjacent to the first common electrode line 210 220.

Next, referring to FIG. 2C , a laser welding process is performed to electrically connect the jumper wire 238 to the first common electrode line 210 and the second common electrode line 220 . For example, at point a', the jumper 238 is welded to the second common electrode line 220, so that the jumper 238 is electrically connected to the second common electrode line 220; at point b', the jumper 238 is connected to the first common electrode The wire 210 is welded so that the jumper wire 238 is electrically connected to the first common electrode wire 210 . In this way, the first common electrode line 210 can be electrically connected to the second common electrode line 220 through the jumper 238, so that the common electrode potential can bypass the broken line 212 and stabilize through the second common electrode line 220 and the jumper 238 The ground is supplied to the part of the first common electrode line 210 that would originally generate a weak line. In this way, when the liquid crystal panel 100 displays images, there will be no weak line 110 on the screen 102 .

However, since the data line 231 is cut off to serve as the jumper 238, the image signal cannot be transmitted from one end of the data line 231 to the other end. Repair line to repair data line 231. Wherein, the repairing line can be located in the display area, the periphery of the liquid crystal panel (or called the non-display area), or a combination thereof. Please refer to FIG. 2D. The repair line 250 is formed on the periphery of the liquid crystal panel as an example. A laser welding process can be performed to electrically connect the repair line 250 in the liquid crystal panel 100 to the rest of the data line 231, that is, point a to point b. other than the point. For example, as shown in FIG. 2D , at point c and point d where the data line 231 and the repair line 250 intersect, the two are welded, so that the repair line 250 is electrically connected to the data points other than points a to b. line 231. In this way, the image signal transmitted to the data line 231 can be transmitted from the upper end to the lower end of the data line 231 through the repair line 250 or vice versa, and the image signal is transmitted from the lower end to the upper end.

Although the image signal can be provided to the data line 231 by repairing the repair line 250, as shown in FIG. The line 231 has been modified into a jumper line 238 , so the pixel electrode 260 that originally provided the image signal through the data line 231 cannot be re-feeded by the image signal through the repair of the repair line 250 . Therefore, when the liquid crystal panel 100 displays a picture, because the image signal cannot be transmitted to the pixel electrode 260, and because the pixel electrode 260 is electrically connected to the common potential source 270 through the portion from point a to point b on the data line 231 to obtain a common potential feed-in. Generally speaking, when the liquid crystal panel 100 displays images, a bright spot is formed at the pixel electrode 260 . Therefore, in order to repair the more conspicuous bright spots into less conspicuous dark spots, preferably, a dark spotting process may be selectively performed, as shown in FIG. 2E . For example, performing the dark-spotting process is to perform the laser welding process, and the scan line 241 is electrically connected to the pixel electrode 260 . For example, the scan line 241 can be electrically connected to the point f of the pixel electrode 260 at the point e. When the liquid crystal panel 100 displays images, the display of the pixel electrode 260 will be a less conspicuous dark point. Further, in order to prevent the scan line 241 from affecting the voltage of the common electrode line through the pixel electrode 260 , the connection portion between the pixel electrode 260 and the data line 231 can be laser cut. In other embodiments, the pixel electrode 260 may also be electrically insulated from the scan line 241 and/or the jumper line 238 in order to repair the more conspicuous bright spot into a less conspicuous dark spot. For example, the gate (not shown) of the driving element (not shown in FIG. 2E ) electrically connected to the pixel electrode 260 can be electrically insulated from the scan line 241 and/or the gate electrode (not shown) electrically connected to the pixel electrode 260 can be electrically isolated from the scanning line 241. The source (not shown) of the driving element (not shown in FIG. 2E ) is electrically insulated from the jumper 238 .

Please continue to refer to FIG. 2E and take FIG. 2E as an example. After repairing by the above-mentioned liquid crystal panel common electrode line repair method, the structure of the repaired liquid crystal panel 100 includes at least the first common electrode line 210, the second common electrode line 220 and jumpers. Line 238. Wherein, the first common electrode line 210 has a broken line 212, the second common electrode line 220 is adjacent to the first common electrode line 210, and the jumper 238 electrically connects the first common electrode line 210 and the second common electrode line 220. . Wherein the jumper 238 is intercepted from a part of the data line 231, and the jumper 238 is electrically isolated from the rest of the data line 231, moreover, the jumper needs to cross the first common electrode line 210, the scanning line 241 and the second common electrode Line 220. In this way, when the repaired liquid crystal panel 100 displays images, no weak line 110 will be generated on the display area 102 .

In addition, as shown in FIG. 1 , if the broken line 212 causing the weak line 110 occurs in the middle of the liquid crystal panel 100 , the dark spot after the aforementioned repair method will appear in the middle of the liquid crystal panel 100 . This embodiment discloses how to make dark spots appear at the edge of the liquid crystal panel 100 when repairing the liquid crystal panel 100 to eliminate the weak line 110 . Please refer to FIG. 2F. If you want to make the dark spots appear on the less conspicuous positions on the screen 102, such as the edge of the screen 102, after finding the broken line 212, you can select the data line 235, and the data line 235 and The common potential source 270 is respectively located on both sides of the disconnection 212 . Moreover, it should be noted that the data line 235 is the data line farthest from the broken line 212 , in other words, the position of the data line 235 corresponds to the edge of the display area 102 . Next, a part of the data line 235 is cut off, that is, the data line 235 is cut off from points a and b to form a jumper line 239 . Next, at point a', the jumper wire 239 is electrically connected to the first common electrode line 210; at point b', the jumper wire 239 is electrically connected to the second common electrode line 220. Furthermore, preferably, the repair line 250 on the periphery of the liquid crystal panel 100 is electrically connected to the rest of the data line 235 at points c and d where the data line 235 and the repair line 250 intersect, that is, a Parts other than point b and/or darken the pixel electrode 265 . For example, darkening the pixel electrode 265 includes electrically connecting the scan line 241 at point e to point f of the pixel electrode 265 or the methods described in the above-mentioned embodiments. In this way, when the liquid crystal panel 100 displays a picture, the display of the pixel electrode 265 will be a less conspicuous dark spot, and the dark spot appears at a less conspicuous position on the display area 102, that is, the screen (or display screen). area) at the edge of 102.

Please continue to refer to FIG. 2F , after repairing by the above-mentioned liquid crystal panel common electrode line repair method, the structure of the repaired liquid crystal panel 100 includes at least the first common electrode line 210 , the second common electrode line 220 and the jumper wire 239 . Wherein, the first common electrode line 210 has a broken line 212, the second common electrode line 220 is adjacent to the first common electrode line 210, and the jumper 239 electrically connects the first common electrode line 210 and the second common electrode line 220. . Wherein the jumper 239 is intercepted from a part of the data line 235, and the jumper 239 is electrically isolated from the rest of the data line 231, moreover, the jumper needs to cross the first common electrode line 210, the scanning line 241 and the second common electrode Line 220.

In addition, in the common electrode line design of the existing liquid crystal panel, the left and right ends of the common electrode line of some liquid crystal panels are connected to the common potential source 270, and even in this design, if there is a disconnection, there will still be a weak point. Wire. The position where the weak line appears, for example: if the broken line is on the left of the center of the LCD panel, a weak line can be observed to the right from the broken point. This section of weak line will not extend to the far right, but only a section. The reason for its appearance is that the load on both sides of the broken line is asymmetrical. Conversely, if the broken line is right in the middle of the entire common electrode line, a weak line will appear on the left side of the broken point. In order to repair the broken line 212, please refer to FIG. 2G, according to an embodiment of the present invention, first, check the liquid crystal panel to find a starting point of a weak line, wherein the starting point is the broken line 212 of the first common electrode line 210; then , cut off a data line 231 to form a jumper, this jumper should cross the first common electrode line 210 corresponding to the weak line and the second common electrode line 220 adjacent to the first common electrode line 210 and be connected to the weak line The line is located on the same side of the starting point (broken line 212); then, a laser welding process is performed to electrically connect the first common electrode line 210 and the second common electrode line 220 with the jumper line; moreover, preferably, The laser welding process can be optionally performed to repair the wire 250 electrically connected to the rest of the data wire 231 and/or perform a dark spotting process, the method of which is as described in the above-mentioned embodiment.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solutions of the present invention.

Claims (10)

1. liquid crystal panel common electrode lines mending method is characterized in that it may further comprise the steps:

Check that this liquid crystal panel is to seek a broken string place of one first common electrode lines;

Block a data line and form a wire jumper, this wire jumper is across this first common electrode lines and one second common electrode lines adjacent with this first common electrode lines; And

Carry out a laser welding processing procedure and electrically connect this first common electrode lines and this second common electrode lines with this wire jumper.

2. the method for claim 1 is characterized in that the wherein said step of blocking a data line and forming a wire jumper comprises:

Carry out a cut processing procedure and form this wire jumper, wherein the remainder of this this data line of wire jumper electrical isolation with a part that intercepts this data line.

3. method as claimed in claim 2 is characterized in that it also comprises:

Carry out this laser welding processing procedure electrically connects this data line with a patch cord remainder.

4. the method for claim 1 is characterized in that wherein said wire jumper is across this first common electrode lines, one scan line and this second common electrode lines.

5. the method for claim 1 is characterized in that it also comprises:

Carry out this laser welding processing procedure so that this sweep trace electrically connects a pixel electrode, wherein adjacent this wire jumper of this pixel electrode and across this second common electrode lines.

6. liquid crystal panel is characterized in that it comprises:

One first common electrode lines has a broken string place;

One second common electrode lines, adjacent this first common electrode lines; And

One wire jumper electrically connects this first common electrode lines and this second common electrode lines.

7. liquid crystal panel as claimed in claim 6 it is characterized in that the part of wherein said wire jumper intercepting from a data line, and this wire jumper electrical isolation is in the remainder of this data line.

8. liquid crystal panel as claimed in claim 7 is characterized in that it also comprises:

One patch cord electrically connects the remainder of this data line.

9. liquid crystal panel as claimed in claim 6 is characterized in that wherein said wire jumper is across this first common electrode lines, one scan line and this second common electrode lines.

10. liquid crystal panel as claimed in claim 6 is characterized in that it also comprises:

One pixel electrode electrically connects this sweep trace, and adjacent this wire jumper of this pixel electrode.

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