TWI395004B - Repair structure for liquid crystal display - Google Patents

Description

Repair structure of liquid crystal display

The present invention relates to a data line repair structure for a liquid crystal display, and more particularly to a data line repair structure having a floating line.

In recent years, active liquid crystal displays have been widely used in products such as liquid crystal screens and liquid crystal televisions, and are moving toward a large size. However, a large-sized liquid crystal display requires a long length of wiring such as a scanning line and a data line to drive the thin film transistors of the respective pixel units. Therefore, one or more breakpoints are easily formed in the main line during the manufacturing process.

1 shows a data line repair structure of a conventional liquid crystal display. The liquid crystal display panel 100 includes a scan line 101, and the data line 102 intersects the scan line 101. A gate drive wafer 103 is bonded to a flexible substrate 104 to form a tape and reel package structure. One side of the flexible substrate 104 is connected to the liquid crystal display panel 100, and the other side is connected to a printed circuit board 105. Similarly, a source drive wafer 106 is also bonded to a flexible substrate 107 to form a tape and reel package structure. One side of the flexible substrate 107 is connected to the liquid crystal display panel 100, and the other side is connected to a printed circuit board 108. The gate driving chip 103 generates a gate driving signal, and drives a thin film transistor (not shown in FIG. 1) by the scanning line 101. The source driving chip 106 generates a data signal, and the data line 102 is generated by the data line 102. Write a pixel electrode (not shown in Figure 1).

As shown in FIG. 1, the data line repairing structure includes a first repairing line 109 parallel to the scanning line 101, and intersecting the data line 102 with respect to one end of the source driving wafer 106, and a second repairing line 110 is The left end of the flexible substrate 107 extends to the right end and intersects the data line 102 to which the source drive wafer 106 is connected. When the break point 111 occurs in the data line 102, the first repair line 109, the second repair line 110, and the data line 102 are fused by, for example, laser light to form two connection points 112a and 112b. Since the first repairing line 109 and the second repairing line 110 can be connected to each other by the lines on the printed circuit boards 105 and 108, the source driving wafer 106 generates a data signal sequentially via the second repairing line 110 and the printed circuit. The lines on the boards 108 and 105, and the first repair line 109 are transferred to a portion of the data line located above the break point 111.

The repairing structure and the repairing method are used to connect the first repairing line and the second repairing line by using a line on the X side and the Y side printed circuit board. However, when the liquid crystal display panel has a glass flip chip structure or a film flip chip In the case of the structure, that is, the driving wafer is bonded to the liquid crystal display panel, or bonded to a flexible substrate and the X-side or Y-side printed circuit board is omitted, the repair structure and the repairing method are not applicable.

In view of this, the present invention provides a data line repair structure of a liquid crystal display panel. The repairing structure comprises a repairing line and a floating line, the repairing line intersects the first end of the data line, the floating line is floated with the second end of the data line and the repairing line, and the data line and the repairing line are electrically connected by welding. . When the data line has a breakpoint, the data signal can be written to the pixel electrode by the repair line and the floating line.

The invention further provides a data line repairing structure of a liquid crystal display panel, wherein the repairing structure comprises a first repairing line, a second repairing line, a first floating line and a second floating line. The first repairing line intersects the first end of the first data line, the second repairing line intersects the first end of the second data line, and the first floating line is floated with the second end of the first data line and the first repairing line And electrically connecting the first data line and the first repairing line by welding, the second floating wire is floated with the second end of the second data line and the second repairing line, and the second data is electrically connected by welding a line and a second repair line, wherein when the first data line and the second data line each have a break point, the first data signal can be written into the first pixel electrode by the first repair line and the first floating line, and the second The data signal can be written to the second pixel electrode by the second repair line and the second floating line.

The above and other objects, features and advantages of the present invention will become more <RTIgt; The layout of the data line repair structure 200 of the embodiment, as shown in FIG. 2, the data line repair structure 200 includes data lines D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ ～ D _{n ,} and D _{n . +1} , D _n+2 , D _n+3 , D _n+4 , D _n+5 , D _n+6 to D _2n , repair lines 201 , 202 , 203 and 204 , short floating line S ₁ , S ₃ , S ₅ ... S _2p-1 and S _n+2 , S _n+4 , S _n+6 ... S _2n , long floating line L ₂ , L ₄ , L ₆ ... L _2P and L _n+1 , L _n+3 , L _n+5 ... L _2n-1 . Among them, short floating lines S ₁ , S ₃ , S ₅ ... S _2p-1 and S _n+2 , S _n+4 , S _n+6 ... S _2n and long floating wires (long Floating line) L ₂ , L ₄ , L ₆ ... L _2P and L _n+1 , L _n+3 , L _n+5 ... L _{2n-1 are} not connected to any data line or repair line, only in When the data line has a breakpoint, a short floating wire or a long floating wire will be soldered to the corresponding repairing line 201, 202, 203 or 204 and the corresponding data lines D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ ～ D _n and D _n+1 , D _n+2 , D _n+3 , D _n+4 , D _n+5 , D _n+6 ～ D _2n such that the repair line can be connected by the corresponding floating line Transfer the data signal to the corresponding data line.

According to an embodiment of the invention, the data lines D ₃ , D ₆ , D _n+3 and D _n+4 each have a break point 211, 212, 213 and 214, and the short floating lines S ₃ are respectively soldered by W ₁ and W ₂ and ₃ and the data line D connected to the repair line 201, line 201 can be repaired so that the floating connection through short signal S ₃ from the data on the data lines D ₃ side half (not shown) via a wiring line 201 and a short repair floating S _{3 is} transferred to the lower half of the data line D ₃ ; the long floating line L _{6 is} connected to the data line D ₆ and the repair line 202 by soldering points W ₃ and W ₄ , respectively, so that the repair line 202 can be connected by the long floating line L ₆ The data signal is transmitted from the upper half of the data line D ₆ (not shown) via the repair line 202 and the long floating line L ₆ to the lower half of the data line D ₆ .

Similarly, the short floating wiring S _{n+4 is} connected to the data line D _n+4 and the repairing line 203 by soldering points W ₅ and W ₆ , respectively, so that the repairing line 203 can transmit the data signal by the short floating wiring S _n+4 from the above data lines D _{n + 4} side half (not shown) via line 203 and a short repair floating wiring S _{n + 4} is transmitted to the data lines D _{n + 4} under side half; long floats wiring L _{n + 3,} respectively, by The solder joints W ₇ and W _{8 are} connected to the data line D _n+3 and the repair line 204, so that the repair line 204 can pass the data signal from the upper half of the data line D _n+3 by the long floating line L _n+3 (in the figure) Not shown) is transmitted to the lower half of the data line D _n+3 via the repair line 204 and the long floating line L _n+3 .

Due to short floating lines S ₁ , S ₃ , S ₅ ... S _2p-1 and S _n+2 , S _n+4 , S _n+6 ... S _2n and long floating lines L ₂ , L ₄ , L ₆ ... L _2P and L _n+1 , L _n+3 , L _n+5 ... L _2n-1 are floating, only the short or long floating wiring corresponding to the breakpoint will be associated with the corresponding data line Connected to the corresponding repair line, and the repair lines 201, 202, 203, and 204 are not interleaved with the data lines, so the effect of the RC delay between the data lines and the repair lines can be greatly reduced to avoid the signal waveform from the original square wave. Become a triangle wave.

3 is a data line repair structure 300 of a liquid crystal display panel according to an embodiment of the present invention. The liquid crystal display panel 301 (for example, a glass substrate) includes a scan line 302, and the data line 303 intersects with the scan line 302. A transistor (not shown in Fig. 3) is formed at the intersection of the scanning line 302 and the data line 303. The thin film transistor has a gate connected to the scan line 302, a source connected to the data line 303, and a drain connected to a pixel electrode (not shown in FIG. 3). The gate driving wafer 304 is bonded to a flexible substrate 306a to form a chip-on-film (COF) structure, and the flexible substrate 306a is bonded to the liquid crystal display panel 301, and the scanning line is utilized. 302 transmits a gate signal to drive the thin film transistor. A source driving chip 305 is bonded to a flexible substrate 306c, that is, a tape carrier package (TCP) structure is formed, and a data signal is transmitted by the data line 303 to be written into the pixel electrode. . One side of the flexible substrate 306c is bonded to the liquid crystal display panel 301, and the other side is joined to a printed circuit board 307. In addition, the printed circuit board 307 includes a plurality of lines such as a power line and a ground line.

The second repairing line 308b is connected to one of the lines on the flexible substrate 306a via a connection pad 313, and the gate is electrically connected to the wafer 304 by the wiring. Therefore, as shown in FIG. 3, when the data line 303 has a break point 310, the first repairing line 308a and the data line 303 are welded by a laser beam to form a connection point 311, and the floating line 321 is welded to connect the third. The repair line 308c and the data line 303, and the transparent conductive layer 309 are welded to connect the first repair line 308a and the fourth repair line 308d. Therefore, the source driving chip 305 generates a data signal which can be sequentially passed through the first repairing line 308a, the fourth repairing line 308d, the flexible substrate 306c, the circuit on the printed circuit board 307, the flexible substrate 306b, and the second The inner lines of the repair line 308b, the flexible substrate 306a, and the gate drive wafer 304 are finally transferred to a portion of the data line below the breakpoint 310 via the third repair line 308c and the floating line 321 . It is worth noting that the floating wire 321 does not intersect the data line to avoid the RC delay effect.

Each repairing line of the data repairing structure may include more than one, respectively. Therefore, when a plurality of data lines have breakpoints on the liquid crystal display panel, the corresponding repairing lines may be used for repairing respectively, and the following two embodiments are respectively explained. .

4 is a data line repairing structure of a liquid crystal display panel according to another embodiment of the present invention. The source driving chip 405 is also bonded to the X-side peripheral region of the liquid crystal display panel 401 by a conductive adhesive, that is, a glass is formed. A chip-on-glass (COG), so the data line repair structure includes a fifth repair line 408e parallel to the scan line 402 and electrically connected to the source drive wafer 405, and a fourth repair line 408f The oblique wiring area is formed on the liquid crystal display panel 401 to electrically connect the internal lines of the first repairing line 408a and the source driving wafer 405. In addition, a transparent conductive layer 409 is disposed between the fourth repairing line 408f and the first repairing line 408a.

As shown in FIG. 4, when the data line 403 has a breakpoint 410, the first repairing line 408a and the data line 403 are fused by a laser beam to form a connection point 411, and the floating wiring 421 is welded to connect the third repairing line. 408c and the data line 403, and the transparent conductive layer 409 are welded to connect the first repairing line 408a and the fourth repairing line 408f. Therefore, the source driving chip 405 generates a data signal sequentially through the first repairing line 408a, the fourth repairing line 408f, the internal wiring of the source driving wafer 405, the fifth repairing line 408e, the second repairing line 408b, and The gate drives the internal circuitry of the die 404 and is ultimately transferred to a portion of the data line below the breakpoint 410 via the third repair trace 408c and the float 421.

Similarly, the source driving chip 406 is also bonded to the liquid crystal display panel 401 by using a conductive adhesive. The fourth repairing line 408g is formed on a diagonal wiring area of the liquid crystal display panel 401, and electrically connected to the first supplementary line 408h. And the internal circuitry of the source drive wafer 405. In addition, a transparent conductive layer 419 is disposed between the first repair line 408h and the fourth repair line 408g.

When the data line 413 has a break point 420, the first repair line 408h and the data line 413 are welded by a laser beam to form a connection point 416, and the floating line 431 is welded to connect the third repair line 408i and the data line 413, and The transparent conductive layer 419 is welded to connect the first repairing line 408h and the fourth repairing line 408g. Therefore, the source driving chip 406 generates a data signal through the first repairing line 408h, the fourth repairing line 408g, the internal wiring of the source driving wafer 406, the fifth repairing line 408e, the second repairing line 408j, and The gate drives the internal wiring of the wafer 407, and finally passes through the third repairing line 408i and the floating wiring 431 to a portion of the data line below the breakpoint 420.

Fig. 5 is a view showing a data line repairing structure of a liquid crystal display panel according to another embodiment of the present invention. The first repairing lines 501a and 501b are respectively fused to an odd number of data lines 550a and an even number of data lines 550b. The long floating wire 511 is welded to the third repairing wire 503a and the odd data wire 550a, and the short floating wire 512 is welded to the third repairing wire 503b and the even data wire 550b. Therefore, when the odd data wire 550a breaks, A data signal is transmitted by the first repairing line 501a, the fourth repairing line 504a, the second repairing line 502a, and the third repairing line 503a. When a break point occurs in the even data line 550b, a data signal can be transmitted by using the first repair line 501b, the fourth repair line 504b, the second repair line 502b, and the third repair line 503b.

The repairing structure of the present invention is connected to the corresponding data line and the corresponding repairing line by using a specific floating wiring, the other floating wiring is floating, and the repairing line is not interlaced with the data line, so between the data line and the repairing line The effect of the RC delay can be greatly reduced to avoid the signal waveform from changing from the original square wave to the triangular wave.

The present invention has been described above with reference to the preferred embodiments thereof, and is not intended to limit the scope of the present invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

101. . . Scanning line

102. . . Data line

103. . . Gate driver chip

104, 107. . . Flexible substrate

105, 108. . . A printed circuit board

106. . . Source driver chip

109. . . First repair line

110. . . Second repair line

111. . . Breakpoint

112a, 112b. . . Junction

200. . . Data line repair structure

201, 202, 203, 204. . . Repair line

211, 212, 213 and 214. . . Breakpoint

301, 401. . . LCD panel

302. . . Scanning line

303, 403, 413. . . Data line

305, 405, 406. . . Source driver chip

307. . . A printed circuit board

308b, 408b, 408j. . . Second repair line

308d. . . Fourth repair line

310, 410, 420. . . Breakpoint

313. . . Connection

321, 421, 431. . . Floating cable

304, 404, 407. . . Gate driver chip

306a, 306b, 306c. . . Flexible substrate

308a, 408a, 408h. . . First repair line

308c, 408c, 408i. . . Third repair line

408f, 408g. . . Sixth repair line

408e. . . Fifth repair line

409, 419. . . Transparent conductive layer

411, 416. . . Junction

501a, 501b. . . First repair line

502a, 502b. . . Second repair line

503a, 503b. . . Third repair line

504a, 504b. . . Fourth repair line

550a, 550b. . . Data line

511, L ₂ , L ₄ , L ₆ , L _n+1 , L _n+3 , L _n+5 . . . Long floating wiring

512, S ₁ , S ₃ , S ₅ , S _n+2 , S _n+4 , S _n+6 . . . Short floating wiring

D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ , D _n . . . Data line

D _n+1 , D _n+2 , D _n+3 , D _n+4 , D _n+5 , D _n+6 , D _2n . . . Data line

W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ , W ₇ , W ₈ . . . Solder joint

Figure 1 shows a data line repair structure of a conventional liquid crystal display;

2 is a layout view showing a data line repairing structure according to an embodiment of the present invention;

3 is a view showing a data line repairing structure of a liquid crystal display panel according to an embodiment of the present invention;

4 is a view showing a data line repairing structure of a liquid crystal display panel according to another embodiment of the present invention;

Fig. 5 is a view showing a data line repairing structure of a liquid crystal display panel according to another embodiment of the present invention.

200. . . Data line repair structure

201, 202, 203, 204. . . Repair line

211, 212, 213 and 214. . . Breakpoint

L ₂ , L ₄ , L ₆ , L _n+1 , L _n+3 , L _n+5 . . . Long floating wiring

S ₁ , S ₃ , S ₅ , S _n+2 , S _n+4 , S _n+6 . . . Short floating wiring

D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ , D _n . . . Data line

D _n+1 , D _n+2 , D _n+3 , D _n+4 , D _n+5 , D _n+6 , D _2n . . . Data line

W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ , W ₇ , W ₈ . . . Solder joint

Claims (14)

A data line repairing structure of a liquid crystal display panel, the liquid crystal display panel comprising a scan line, a data line intersecting the scan line, a film crystal system formed at the intersection of the scan line and the data line and electrically connected to a pixel electrode Connecting, a gate driving chip is electrically connected to the scan line to generate a gate signal to drive the thin film transistor, and a source driving chip is electrically connected to the data line to generate a data signal to be written into the pixel electrode, The repair structure includes: a repair line intersecting the first end of the data line, but having a horizontal distance from the second end of any data line to avoid delay of resistance and capacitance of other data lines after repair (RC delay) And a floating wire, floating with the second end of the data line and the repairing line, and electrically connecting the data line and the repairing line by welding, wherein when the data line has a breakpoint, the data The signal can be written to the pixel electrode by the repairing line and the floating line, wherein the first end of the data line is adjacent to one end of the source driving chip, and the second end of the data line is far away One end of the wafer is driven from the source. The data line repairing structure of the liquid crystal display panel of claim 1, wherein the gate driving chip is bonded to the liquid crystal display panel. The data line repairing structure of the liquid crystal display panel of claim 1, wherein the source driving chip is bonded to the liquid crystal display panel. A data line repairing structure of a liquid crystal display panel, the repairing structure comprising: a first repairing line intersecting the first end of the first data line, but having a short horizontal distance from the second end of the arbitrary data line to avoid delaying the resistance and capacitance of the other data lines after the repair; a second repairing line intersecting the first end of the second data line, but having a long horizontal distance from the second end of the arbitrary data line to avoid delaying the resistance and capacitance of the other data lines after the repair; a floating wire, floating with the second end of the first data line and the first repairing line, and electrically connecting the first data line and the first repairing line by welding; and a second floating line, The second end of the second data line and the second repair line are floated, and the second data line and the second repair line are electrically connected by welding, wherein the first data line and the second data line Each of the first data signals can be written into the first pixel electrode by the first repairing line and the first floating line, and the second data signal can be used by the second repairing line and the first The second floating wire is written to a second pixel electrode, wherein the The first ends of the first and second data lines are adjacent to one end of the source driving chip, and the second ends of the first and second data lines are away from one end of the source driving chip, wherein the first floating line is The short floating wiring and the second floating wiring are long floating wiring. A data line repairing structure of a liquid crystal display panel, the liquid crystal display panel comprising a scan line, a data line intersecting the scan line, a thin film electro-crystal system formed at the intersection of the scan line and the data line and electrically connected to a pixel electrode Connecting, a gate driving chip is electrically connected to the scan line to generate a gate The pole signal drives the thin film transistor, and a source driving chip is electrically connected to the data line to generate a data signal to be written into the pixel electrode, and the repairing structure comprises: a first repairing line parallel to the scanning line, and Intersecting with the first end of the data line; a second repairing line parallel to the data line and electrically connecting the gate driving wafer; a third repairing line parallel to the scanning line and electrically connecting the first Second repair line, but with a horizontal distance from the second end of any data line to avoid delay of resistance and capacitance of other data lines after repair; and a floating line, floating with the data line and the third repair line, And electrically connecting the data line and the third repairing line by welding, wherein when the data line has a break point, the source driving chip can be the first repairing line, the second repairing line, the first The three repair lines and the floating wiring write the data signal to the pixel electrode, wherein the first end of the data line is adjacent to one end of the source driving chip, and the second end of the data line is away from the source driving chip End. The data line repairing structure of the liquid crystal display panel of claim 5, wherein the gate driving chip is bonded to the liquid crystal display panel. The data line repairing structure of the liquid crystal display panel of claim 5, wherein the gate driving chip is bonded to a flexible substrate, and the second repairing line utilizes the flexible substrate The line is electrically connected to the gate drive chip. For example, the information of the liquid crystal display panel described in claim 5 The wire repairing structure further includes a fourth repairing line formed on one of the oblique wiring areas on the liquid crystal display panel, and electrically connected to the first repairing line and the line on a printed circuit board. The data line repairing structure of the liquid crystal display panel of claim 8, wherein the fourth repairing wire is electrically connected to a line on the printed circuit board via a flexible substrate, and the source driving chip system Bonded to the flexible substrate. The data line repairing structure of the liquid crystal display panel of claim 8, wherein the fourth repairing line and the first repairing line comprise a transparent conductive layer. The data line repairing structure of the liquid crystal display panel of claim 5, further comprising a fifth repairing line parallel to the scanning line, and the fifth repairing line is connected to the source driving wafer. The data line repairing structure of the liquid crystal display panel of claim 11, wherein the source driving chip is bonded to the liquid crystal display panel. The data line repairing structure of the liquid crystal display panel of claim 11, further comprising a sixth repairing line formed on one of the oblique wiring areas on the substrate, and the first repairing line and the fifth Repair the line electrical connection. The data line repairing structure of the liquid crystal display panel of claim 13, wherein the sixth repairing line and the first repairing line comprise a transparent conductive layer.