CN100504515C - Repairing structure and method for liquid crystal display - Google Patents

Abstract

The present invention relates to a data line repair structure of a liquid crystal display panel, which comprises: a first repair line parallel to a scan line and intersecting with a first end of the data line; a second repair line parallel to the data line and connected to a gate driver chip; and a third repair line parallel to the scan line and intersecting with a second end of the data line. When the data line has a breakpoint, the source driver chip can write a data signal into a pixel electrode through the first repair line, the second repair line, and the third repair line.

Description

Liquid crystal display repair structure and repair method

technical field

The invention relates to a data line repair structure and a repair method of a liquid crystal display, in particular to a chip-on-glass (COG) structure or a chip-on-film (COF) structure Data line repair structure and repair method.

Background technique

In recent years, active liquid crystal displays have been widely used in products such as liquid crystal screens and liquid crystal televisions, and are developing toward larger sizes. However, a large-size liquid crystal display requires long lines, such as scan lines and data lines, to drive the thin film transistors of each pixel unit. Therefore, it is easy to form one or more breaks in the main line during the manufacturing process.

FIG. 1 shows a data line repair structure of a known liquid crystal display. A liquid crystal display panel 100 includes a scan line 101 and a data line 102 intersecting the scan line 101 . The gate driver chip 103 is bonded on the flexible substrate 104 to form a tape and reel packaging structure. One side of the flexible substrate 104 is connected to the liquid crystal display panel 100 , and the other side is connected to the printed circuit board 105 . Similarly, the source driver chip 106 is also bonded on the flexible substrate 107 to form a tape and reel packaging structure. One side of the flexible substrate 107 is connected to the liquid crystal display panel 100 , and the other side is connected to the printed circuit board 108 . The gate driving chip 103 generates a gate driving signal, and drives a thin film transistor (not shown in FIG. electrodes (not shown in Figure 1).

As shown in Figure 1, the data line repair structure includes: a first repair line 109, which is parallel to the scan line 101, and intersects with an end of the data line 102 opposite to the source driver chip 106; a second repair line 110, which is from The left end of the flexible substrate 107 extends to the right end, and intersects with the data line 102 connected to the source driver chip 106 . When the break point 111 occurs on the data line 102 , the first repair line 109 , the second repair line 110 and the data line 102 are welded by eg laser to form two connection points 112 a and 112 b. Since the first repair line 109 and the second repair line 110 can be connected to each other through the lines on the printed circuit boards 105 and 108, the data signal generated by the source driver chip 106 passes through the second repair line 110 and the printed circuit board 108 in sequence. And the line on 105 , and the first repair line 109 to transmit to the part of the data line above the breakpoint 111 .

The above-mentioned repairing structure and repairing method utilize the lines on the X-side and Y-side printed circuit boards to connect the first repairing line and the second repairing line. However, when the liquid crystal display panel has a chip-on-glass structure or a chip-on-film structure, That is, if the driving chip is bonded to the liquid crystal display panel, or to the flexible substrate and the printed circuit board on the X side or the Y side is omitted, the above repair structure and repair method are not applicable.

Contents of the invention

One object of the present invention is to provide a data line repair structure of a liquid crystal display panel, the liquid crystal display panel includes a scan line, a data line intersecting with the scan line, and a thin film transistor formed between the scan line and the data line Line intersection and electrically connected with the pixel electrode, a gate driver chip, which is electrically connected with the scan line to generate a gate signal to drive the thin film transistor, and a source driver chip, which is electrically connected with the data line to generate data A signal is written to the pixel electrode. The repair structure includes: a first repair line, which is parallel to the scan line, and intersects with the first end of the data line close to the source driver chip; a second repair line, which is parallel to the data line, and connected the gate driver chip; and a third repair line, which is parallel to the scan line and intersects with the second end of the data line opposite to the source driver chip. Wherein when the data line has a break point, the source driver chip can write the data signal into the pixel electrode through the first repair line, the second repair line, and the third repair line.

Another object of the present invention is to provide a method for repairing data lines of a liquid crystal display panel. The liquid crystal display panel includes a scanning line, a data line intersecting the scanning line, and a thin film transistor formed between the scanning line and the scanning line. Where the data lines intersect and are electrically connected to the pixel electrodes, a gate driver chip is electrically connected to the scan line to drive the thin film transistor, and a source driver chip is electrically connected to the data line to write data signals the pixel electrode. The repairing method includes: forming a first repairing line, wherein the first repairing line is parallel to the scanning line and intersects with the first end of the data line close to the source driver chip; welding the first repairing line and the data line ; forming a second repair line, wherein the second repair line is parallel to the data line, and includes the internal circuit of the gate drive chip; forming a third repair line, wherein the third repair line is parallel to the scan line, and is connected to the scanning line The data line intersects with the second end of the source driver chip; and welding the third repair line and the data line. Wherein when the data line has a break point, the source driver chip can write the data signal into the pixel electrode through the first repair line, the second repair line, and the third repair line.

Description of drawings

FIG. 1 is a schematic diagram of a data line repair structure of a known liquid crystal display.

FIG. 2 is a structure diagram of repairing data lines of the liquid crystal display panel according to the first embodiment of the present invention.

FIG. 3 is a structure diagram of repairing data lines of a liquid crystal display panel according to a second embodiment of the present invention.

FIG. 4 is a structure diagram of repairing data lines of a liquid crystal display panel according to a third embodiment of the present invention.

FIG. 5 is a structure diagram of repairing data lines of a liquid crystal display panel according to a fourth embodiment of the present invention.

Detailed ways

2 shows the data line repair structure of the liquid crystal display panel according to the first embodiment of the present invention. The liquid crystal display panel 201, such as a glass substrate, includes a scanning line 202, and a data line 203 intersecting the scanning line 202 is formed on the scanning line 202. The thin film transistor (not shown in FIG. 2 ) at the intersection with the data line 203 . The TFT has a gate connected to the scan line 202, a source connected to the data line 203, and a drain connected to a pixel electrode (not shown in FIG. 2). The gate driver chip 204 is bonded to the Y-side peripheral area of the liquid crystal display panel 201 with conductive adhesive, that is, a chip-on-glass (COG) structure is formed, and the gate signal is transmitted by the scan line 202 to drive the film. transistor. The source driver chip 205 is bonded on the flexible substrate 206a, that is, forms a tape carrier package (TCP) structure, and uses the data line 203 to transmit a data signal to write into the pixel electrode. One side of the flexible substrate 206 a is connected to the liquid crystal display panel 201 , and the other side is connected to a printed circuit board 207 . In addition, the printed circuit board 207 includes multiple lines such as power lines and ground lines.

As shown in Figure 2, the data line repair structure of the present invention includes: a first repair line 208a, which is parallel to the scan line 202, and intersects with an end of the data line 203 close to the source driver chip 205; a second repair line 208b, which It is parallel to the data line 203 and electrically connected to the gate driver chip 204. At the same time, the second repair line 208b is electrically connected to the circuit on the printed circuit board 207 via the flexible substrate 206b; the third repair line 208c is connected to the scan line 202 parallel to and intersect with the end of the data line 203 opposite to the source driver chip 205 . The data line repair structure further includes a fourth repair line 208d, which is formed in the diagonal wiring area on the liquid crystal display panel 201, and connects the first repair line 208a and the circuit on the printed circuit board 207 via the flexible circuit board 206a . In addition, there is a transparent conductive layer 209 between the fourth repairing line 208d and the first repairing line 208a.

According to the first embodiment of the present invention, when the data line 203 has a break point 210, the first repair line 208a and the data line 203 can be welded to form a connection point 211 by using, for example, a laser beam, and the third repair line 208c and the data line 203 can be welded To form the connection point 212, and weld the transparent conductive layer 209 to connect the first repair line 208a and the fourth repair line 208d. Therefore, the data signal generated by the source driver chip 205 can sequentially pass through the first repair line 208a, the fourth repair line 208d, the flexible substrate 206a, the circuit on the printed circuit board 207, the flexible substrate 206b, the second repair line The line 208b is connected to the internal circuit of the gate driver chip 204 , and finally transmitted to the part of the data lines below the breakpoint 210 via the third repair line 208c.

3 shows the data line repair structure of the liquid crystal display panel according to the second embodiment of the present invention, the liquid crystal display panel 301 is substantially the same as the first embodiment of the present invention, but in the second embodiment of the present invention, the gate drive The chip 304 is bonded to the flexible substrate 306a, that is, a chip-on-film (COF) structure is formed, and the flexible substrate 306a is bonded to the liquid crystal display panel 301, so the second repair line 308b passes through the connection 313 is connected to the circuit on the flexible substrate 306a, and then electrically connected to the gate driving chip 304 via the circuit. Therefore, as shown in FIG. 3, when the data line 303 has a break point 310, use, for example, a laser beam to weld the first repair line 308a and the data line 303 to form a connection point 311, and weld the third repair line 308c and the data line 303 to form a connection point 311. A connection point 312 is formed, and the transparent conductive layer 309 is welded to connect the first repair line 308a and the fourth repair line 308d. Therefore, the data signal generated by the source driver chip 305 can sequentially pass through the first repair line 308a, the fourth repair line 308d, the flexible substrate 306c, the circuit on the printed circuit board 307, the flexible substrate 306b, the second repair line The wire 308b, the flexible substrate 306a, and the internal wires of the gate driver chip 304 are finally transmitted to the part of the data wires below the breakpoint 310 via the third repair wire 308c.

4 shows the data line repair structure of the liquid crystal display panel according to the third embodiment of the present invention, the liquid crystal display panel 401 is substantially the same as the first embodiment of the present invention, but in the third embodiment of the present invention, the source drive The chip 405 is also bonded to the X-side peripheral area on the liquid crystal display panel 401 with conductive glue, so the data line repair structure includes: the fifth repair line 408e, which is parallel to the scan line 402 and electrically connected to the source driver chip 405, and the fifth repair line 408e Six repair lines 408f are formed in the diagonal wiring area on the liquid crystal display panel 401 to electrically connect the first repair line 408a and the internal circuit of the source driver chip 405 . In addition, there is a transparent conductive layer 409 between the sixth repair line 408f and the first repair line 408a.

As shown in FIG. 4, when the data line 403 has a break point 410, use, for example, a laser beam to weld the first repair line 408a and the data line 403 to form a connection point 411, and weld the third repair line 408c and the data line 403 to form a connection point 412, and weld the transparent conductive layer 409 to connect the first repair line 408a and the sixth repair line 408f. Therefore, the data signal generated by the source driver chip 405 can pass through the first repair line 408a, the sixth repair line 408f, the internal circuit of the source driver chip 405, the fifth repair line 408e, the second repair line 408b, and The internal circuit of the gate driver chip 404 is finally transmitted to a part of the data lines below the breakpoint 410 via the third repair line 408c.

In the above embodiments, each repairing line of the data repairing structure may contain more than one, so when a plurality of data lines break on the liquid crystal display panel at the same time, the corresponding repairing lines can be respectively used for repairing. As shown in FIG. 5, the first repairing lines 501a and 501b are welded to the odd data lines 502a and the even data lines 502b respectively. Correspondingly, the third repairing lines 503a and 503b are respectively welded to the odd-numbered data lines 502a and the even-numbered data lines 502b, so when the odd-numbered data lines 502a break, the first repairing line 501a and the fourth repairing line can be used. The line 506a, the second repair line 504a, and the third repair line 503a transmit a data signal. When a break occurs in an even number of data lines 502b, a data signal can be transmitted by using the first repair line 501b, the fourth repair line 506b, the second repair line 504b, and the third repair line 503b.

The present invention relates to a data line repair structure and repair method of a liquid crystal display panel, which is characterized in that the second repair line is connected to a gate drive chip, that is, the repair structure and repair method of the present invention utilize the internal circuit transmission of the gate drive chip data signal. According to the liquid crystal display panel of the present invention, the gate driver chip has a chip-on-glass structure or a chip-on-film structure, and the source driver chip may have a chip-on-glass structure or a bag-on-roll packaging structure.

The above description is only to describe the technical content of the present invention in detail by using preferred embodiments, but not to limit the patent scope of the present invention. Therefore, the present invention can be variously modified by those of ordinary skill in the art, and some minor changes and adjustments will still be made without losing the gist of the present invention, nor departing from the spirit and scope of the present invention. Therefore still all should be regarded as the further implementation status of the present invention.

Claims (16)

1, a kind of data line patch structure of display panels, this display panels includes the one scan line, with the crossing data line of this sweep trace, one thin film transistor (TFT), it is formed at this sweep trace and is electrically connected with this data line confluce and with pixel electrode, one grid drive chip, it is electrically connected with this sweep trace to produce signal and drives this thin film transistor (TFT), and one source pole chip for driving, it is electrically connected with this data line to produce data-signal and writes this pixel electrode, and this preparing structure comprises:

One first patch cord, it is parallel with this sweep trace, and crossing with first end of this data line;

One second patch cord, it is parallel with this data line, and is electrically connected this grid drive chip; And

One the 3rd patch cord, it is parallel with this sweep trace, and crossing with second end of this data line,

One the 4th patch cord, it is formed at the oblique distribution zone on this display panels, and be connected with the line electricity on this first patch cord and the printed circuit board (PCB), wherein the 4th patch cord is connected with line electricity on this printed circuit board (PCB) via first flexible base plate, and this source driving chip is engaged on this first flexible base plate

Wherein when this data line has breakpoint, this source driving chip can be in regular turn writes this pixel electrode by the internal wiring and the 3rd patch cord of the circuit on this first patch cord, the 4th patch cord, this first flexible base plate, this printed circuit board (PCB), second flexible base plate, this second patch cord, this grid drive chip with this data-signal.

2, preparing structure as claimed in claim 1, wherein this grid drive chip is engaged on this display panels.

3, as claim 1 a described preparing structure, wherein this grid drive chip is engaged on second flexible base plate, and this second patch cord utilizes, and a circuit is electrically connected with this grid drive chip on this second flexible base plate.

4,, wherein comprise transparency conducting layer between the 4th patch cord and this first patch cord as claim 1 a described preparing structure.

5, as claim 1 a described preparing structure, wherein close this source driving chip of first end of this data line, and second end of this data line is this source driving chip relatively.

6, a kind of data line patch structure of display panels, this display panels includes the one scan line, with the crossing data line of this sweep trace, one thin film transistor (TFT), it is formed at this sweep trace and is electrically connected with this data line confluce and with pixel electrode, one grid drive chip, it is electrically connected with this sweep trace to produce signal and drives this thin film transistor (TFT), and one source pole chip for driving, it is electrically connected with this data line to produce data-signal and writes this pixel electrode, and this preparing structure comprises:

One first patch cord, it is parallel with this sweep trace, and crossing with first end of this data line;

One second patch cord, it is parallel with this data line, and is electrically connected this grid drive chip; And

One the 3rd patch cord, it is parallel with this sweep trace, and crossing with second end of this data line,

One the 5th patch cord, it is parallel with this sweep trace, and the 5th patch cord connects this source driving chip,

One the 6th patch cord, it is formed at the oblique distribution zone on this substrate, and is electrically connected with the internal wiring of this first patch cord and this source driving chip,

Wherein when this data line has breakpoint, this source driving chip can be in regular turn by the internal wiring of the internal wiring of this first patch cord, the 6th patch cord, this source driving chip, the 5th patch cord, this second patch cord, this grid drive chip, and the 3rd patch cord writes this pixel electrode with this data-signal.

7, as claim 6 a described preparing structure, wherein this source driving chip is engaged on this display panels.

8,, wherein comprise transparency conducting layer between the 6th patch cord and this first patch cord as claim 6 a described preparing structure.

9, a kind of data line method for repairing and mending of display panels, this display panels includes the one scan line, with the data line that this sweep trace intersects, a thin film transistor (TFT), it is formed at this sweep trace and is electrically connected with this data line confluce and with pixel electrode, one grid drive chip, it is electrically connected with this sweep trace driving this thin film transistor (TFT), and the one source pole chip for driving, and it is electrically connected with this data line, data-signal is write this pixel electrode, this method for repairing and mending comprises following steps:

Form first patch cord, this first patch cord is parallel to this sweep trace, and crossing with first end of this data line;

This first patch cord of welding and this data line;

Form second patch cord, this second patch cord is parallel with this data line, and is electrically connected this grid drive chip;

Form the 3rd patch cord, the 3rd patch cord is parallel with this sweep trace, and crossing with second end of this data line;

Welding the 3rd patch cord and this data line; And

Form the 4th patch cord, it is formed at the oblique distribution zone of this display panels, the 4th patch cord is connected with line electricity on this first patch cord and the printed circuit board (PCB), the 4th patch cord is connected with line electricity on this printed circuit board (PCB) via first flexible base plate, and this source driving chip is engaged on this first flexible base plate

Wherein when this data line has breakpoint, then this source driving chip can be in regular turn writes this pixel electrode by the internal wiring and the 3rd patch cord of the circuit on this first patch cord, the 4th patch cord, this first flexible base plate, this printed circuit board (PCB), second flexible base plate, this second patch cord, this grid drive chip with this data-signal.

10, as claim 9 a described method for repairing and mending, wherein this grid drive chip is engaged on this display panels.

11, as claim 9 a described method for repairing and mending, wherein this grid drive chip is engaged on second flexible base plate, and this second patch cord utilizes the circuit on this second flexible base plate to be electrically connected with this grid drive chip.

12,, also comprise the transparency conducting layer between this first patch cord of welding and the 4th patch cord as claim 9 a described method for repairing and mending.

13, as claim 9 a described method for repairing and mending, wherein close this source driving chip of first end of this data line, and second end of this data line is this source driving chip relatively.

14, a kind of data line method for repairing and mending of display panels, this display panels includes the one scan line, with the data line that this sweep trace intersects, a thin film transistor (TFT), it is formed at this sweep trace and is electrically connected with this data line confluce and with pixel electrode, one grid drive chip, it is electrically connected with this sweep trace driving this thin film transistor (TFT), and the one source pole chip for driving, and it is electrically connected with this data line, data-signal is write this pixel electrode, this method for repairing and mending comprises following steps:

Form first patch cord, this first patch cord is parallel to this sweep trace, and crossing with first end of this data line;

This first patch cord of welding and this data line;

Form second patch cord, this second patch cord is parallel with this data line, and is electrically connected this grid drive chip;

Form the 3rd patch cord, the 3rd patch cord is parallel with this sweep trace, and crossing with second end of this data line;

Welding the 3rd patch cord and this data line; And

Form the 5th patch cord, it is parallel with this sweep trace, and is electrically connected with this source driving chip and this second patch cord,

Oblique distribution zone at this display panels forms the 6th patch cord, and the 6th patch cord is electrically connected with the internal wiring of this first patch cord and this source driving chip,

Wherein when this data line has breakpoint, this source driving chip can be in regular turn by the internal wiring of the internal wiring of this first patch cord, the 6th patch cord, this source driving chip, the 5th patch cord, this second patch cord, this grid drive chip, and the 3rd patch cord writes this pixel electrode with this data-signal.

15, as claim 14 a described method for repairing and mending, wherein this source driving chip is engaged on this display panels.

16,, also comprise the transparency conducting layer between this first patch cord of welding and the 6th patch cord as claim 14 a described method for repairing and mending.

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