TWI402595B - Liquid crystal display device and repairing method thereof - Google Patents

Description

Liquid crystal display and repair method thereof

The present invention relates to a display and a repair method thereof, and more particularly to a liquid crystal display and a repair method thereof.

With the increasing maturity of optoelectronic technology and semiconductor manufacturing technology, flat display devices are booming. Among them, based on its low voltage operation, no radiation scattering, light weight and small size, the liquid crystal display has gradually replaced the traditional cathode ray tube display, and has become the mainstream of display products in recent years.

The display includes a pixel array substrate, a pair of substrates, and a display medium layer between the pixel array substrate and the opposite substrate. The pixel array substrate includes a substrate, a pixel array disposed on the substrate, a plurality of scan lines, a plurality of data lines, a plurality of common lines, a plurality of gate driving units, and a source driving circuit. Each pixel in the pixel array includes an active component and a pixel electrode, and the active component includes a gate electrically connected to the corresponding scan line, a source electrically connected to the corresponding data line, and a corresponding picture The electrode is electrically connected to the drain. The opposite substrate includes a substrate and a common electrode disposed on the substrate.

Generally, the method of driving the pixels includes providing a common AC voltage to the common line of the pixel array substrate and the common electrode of the opposite substrate, and voltage-modulating the traces that provide the common AC voltage. However, in this driving method, since the common AC voltage is simultaneously supplied to the common line and the common electrode, it is necessary to simultaneously perform voltage modulation on the common line and the common electrode, resulting in a large thrust required for the driving circuit. Therefore, a driving method called Capacitive Coupled Driving (CC Driving) is proposed. The driving method is to provide an alternating voltage to the common line of the pixel array substrate, and provide another pulsed direct current voltage to the common electrode of the opposite substrate. In this driving method, a capacitive coupling effect occurs between the common line and the pixel by voltage-modulating the alternating voltage supplied to the common line. In this way, the pixel will pull or pull the pixel electrode to a predetermined voltage level by receiving the common voltage provided by the corresponding common line. In other words, in this driving design, only a small data voltage is required to raise the pixel voltage to a predetermined voltage level, thereby saving power consumption of the driving circuit. In addition, in this driving method, the signals are respectively input to the common line and the common electrode. Therefore, it is only necessary to perform voltage modulation on the common line on the pixel array substrate, so that the overall thrust required for the driving circuit is small.

However, since the capacitive coupling driving method is respectively inputting the signal common line and the common electrode, the traces respectively providing the signals must be fabricated on the pixel array substrate, so that the two signal traces may be staggered. In addition, in order to reduce the impedance of the signal trace, the area of the signal trace is designed to be large. However, this causes the crossover of the two signal traces to be susceptible to electrostatic discharge (ESD) and breakdown of the insulation between the traces. , so that the two signal traces are short-circuited. As a result, the display screen is abnormal and even the display is scrapped.

The present invention provides a liquid crystal display having a structure that is easy to repair.

The present invention further provides a repair method for a liquid crystal display for repairing the aforementioned liquid crystal display.

The invention proposes a liquid crystal display. The liquid crystal display comprises a pixel array substrate, a pair of substrates, at least one first signal transmission line, at least one second signal transmission line, an insulating layer and a liquid crystal layer. The pixel array substrate includes a first substrate, a pixel array, and a plurality of common lines. The pixel array is disposed on the first substrate. The common line is disposed on the first substrate and below the pixel array. The opposite substrate and the pixel array substrate are disposed opposite to each other, and include a second substrate and a common electrode layer. The common electrode layer is disposed on the second substrate. The first signal transmission line is disposed on the first substrate and electrically connected to the common line. The second signal transmission line is disposed on the first substrate, and is electrically connected to the common electrode layer on the second substrate. The first signal transmission line and the second signal transmission line have different voltages, wherein the first signal transmission line and the second signal line The transmission line has at least one interlace, the first signal transmission line at the interlace has a plurality of first sub-lines extending along a first direction, and the second signal transmission line at the interlace has a plurality of edges different from the first a second branch extending in a second direction of direction. The insulating layer is disposed between the first branch line and the second branch line. The liquid crystal layer is disposed between the opposite substrate and the pixel array substrate.

In an embodiment of the invention, the first substrate includes a display area and a peripheral area, the common line is disposed in the display area and extends to the peripheral area, and the first signal transmission line is disposed in the peripheral area.

In an embodiment of the present invention, the first signal transmission line includes a first main line and a second main line, the first branch line is located between the first main line and the second main line, and the first branch line is respectively connected to the first main line With the second main line.

In an embodiment of the invention, the first leg lines are parallel to each other.

In an embodiment of the present invention, the second signal transmission line includes a third main line and a fourth main line, the second branch line is located between the third main line and the fourth main line, and the second branch line is respectively connected to the third main line. With the fourth main line.

In an embodiment of the invention, the second leg lines are parallel to each other.

In an embodiment of the invention, the first direction is perpendicular to the second direction.

In an embodiment of the present invention, a conductive structure is disposed between the opposite substrate and the pixel array substrate, wherein the second signal transmission line is electrically connected to the common electrode layer through the conductive structure.

In an embodiment of the invention, the conductive structure comprises a conductive ball or a conductive post.

In an embodiment of the invention, the first signal transmission line has an alternating voltage, and the second signal transmission line has a pulsed direct current voltage.

The present invention further provides a method for repairing a liquid crystal display, which is suitable for repairing the liquid crystal display described above, when a first branch line of a first signal transmission line and a second branch line of a second signal transmission line are short-circuited. In the case of a short defect, the repairing method includes cutting the first branch line of the crucible, so that the first branch line of the crucible is electrically insulated from the first signal transmission line, or the second branch line of the cutting occurs, so that the second branch occurs. The branch line is electrically insulated from the second signal transmission line, and thus the first signal transmission line is electrically insulated from the second signal transmission line.

In an embodiment of the invention, the first signal transmission line includes a first main line and a second main line, and the first branch line is located in the first main line and in the second main line.

In an embodiment of the invention, after the first branch of the cutting occurs, the first main line or the second main line transmits the signal via the remaining first branch lines.

In an embodiment of the present invention, the second signal transmission line includes a third main line and a fourth main line, the second branch line is located between the third main line and the fourth main line, and the second branch line is respectively connected to the third main line. With the fourth main line

In an embodiment of the invention, after the second leg of the cutting occurs, the third main line or the fourth main line transmits the signal via the remaining second leg.

In an embodiment of the present invention, the intersection of the occurrence of the occurrence includes a first intersection and a second intersection, and the repairing method comprises: cutting the first branch having the first intersection, so that the first branch and the first The signal transmission line is electrically insulated; and the second branch line having the second intersection is cut such that the second branch line where the turns occur is electrically insulated from the second signal transmission line.

The present invention proposes another liquid crystal display. The liquid crystal display comprises a first substrate, a plurality of common lines, a second substrate, a common electrode layer, at least one first signal transmission line, at least one second signal transmission line, an insulating layer and a liquid crystal layer. The common line is disposed on the first substrate. The second substrate is disposed opposite to the first substrate. The common electrode layer is disposed on the second substrate. The first signal transmission line is disposed on the first substrate, extends along a first direction, and is electrically connected to the common line. The second signal transmission line is disposed on the first substrate, extends in a second direction different from the first direction, and is electrically connected to the common electrode layer on the second substrate, where the first signal transmission line and the second signal transmission line have Different voltages, wherein the first signal transmission line and the second signal transmission line have at least one interlace, the first signal transmission line at the interlace has a plurality of first branch lines, and the second signal transmission line at the interlace has a plurality of The second branch. The insulating layer is disposed between the first branch line and the second branch line. The liquid crystal layer is disposed between the first substrate and the second substrate.

Based on the above, the liquid crystal display of the present invention includes a first signal transmission line and a second signal transmission line for respectively transmitting signals to the common line and the common electrode, wherein the first signal transmission line and the second signal transmission line have at least one interlace, and The first signal transmission line located at the intersection has a plurality of first branch lines, and the second signal transmission line located at the intersection has a plurality of second branch lines. When the first branch line and the second branch line are short-circuited due to electrostatic discharge or the like, the first signal line and the second branch line may be separated from the remaining branch lines by the first branch line or the second branch line, so that the first signal transmission line and the second signal transmission line are restored. Electrical insulation. Therefore, the liquid crystal display has an easy-to-repair structure to avoid the end of the liquid crystal display, thereby greatly reducing the manufacturing cost of the liquid crystal display.

The above described features and advantages of the present invention will be more apparent from the following description.

1A and FIG. 1B are respectively a schematic cross-sectional view and a top view of a liquid crystal display according to an embodiment of the present invention, wherein the opposite substrate and the liquid crystal layer are omitted from FIG. 1B. Referring to FIG. 1A and FIG. 1B , the liquid crystal display 100 includes a pixel array substrate 110 , a pair of substrates 130 , at least one first signal transmission line 140 , at least one second signal transmission line 150 , an insulating layer 160 , and a Liquid crystal layer 170. The liquid crystal layer 170 is disposed between the pixel array substrate 110 and the opposite substrate 130.

The pixel array substrate 110 includes a first substrate 112, a pixel array 114, and a plurality of common lines 116. The first substrate 112 includes, for example, a display area 112a and a peripheral area 112b, and the peripheral area 112b surrounds the display area 112a, for example. In the present embodiment, the display area 112a is an inner area surrounded by a broken line in FIG. 1B and the area of the dotted line to the edge of the first substrate 112 is a peripheral area 112b. The pixel array 114 is disposed on the display area 112a of the first substrate 112, for example, and the pixel array 114 includes, for example, a plurality of scan lines, a plurality of data lines, and a plurality of corresponding scan lines and data lines respectively. Pixels (not shown). The common line 116 is disposed on the first substrate 112 and below the pixel array 114. In the present embodiment, the common line 116 is disposed, for example, in the display area 112a and extends to the peripheral area 112b, and the common line 116 extends, for example, in the second direction. The opposite substrate 130 is disposed opposite to the pixel array substrate 110 and includes a second substrate 132 and a common electrode layer 134. The common electrode layer 134 is disposed on the second substrate 132. In the present embodiment, the opposite substrate 130 is, for example, a color filter substrate.

2A is an enlarged schematic view of CR at the staggered portion of FIG. 1B, FIG. 2B is a cross-sectional view taken along line I-I' of FIG. 2A, and FIG. 2C is a partial cross-sectional view of the second signal transmission line and the common electrode layer. Referring to FIG. 1B and FIG. 2A to FIG. 2C , the first signal transmission line 140 is disposed on the first substrate 112 , and at least a portion extends along a first direction D1 to electrically connect the plurality of common lines 116 . The second signal transmission line 150 is disposed on the first substrate 112, and at least a portion thereof extends in a second direction D2 different from the first direction D1, and is electrically connected to the common electrode layer 134 on the second substrate 132. The transfer line 140 has a different voltage than the second signal transfer line 150. In the embodiment, the first signal transmission line 140 and the second signal transmission line 150 are disposed, for example, in the peripheral area 112b. The second signal transmission line 150 is, for example, a loop line. The first signal transmission line 140 is electrically connected to the conductive pad 182, for example, and the second signal transmission line 150 is electrically connected to the conductive pad 184, for example, the conductive pads 182, 184 are respectively connected to different driving chips (not drawn The connection is such that the driver wafer can provide different voltages to the first signal transfer line 140 and the second signal transfer line 150. In this embodiment, the first signal transmission line 140 has, for example, an alternating voltage, and the second signal transmission line 150 has, for example, a pulsed direct current voltage.

Referring to FIG. 2A and FIG. 2B , the first signal transmission line 140 and the second signal transmission line 150 have at least one interlaced CR, and the first signal transmission line 140 located at the interlaced CR has a plurality of first sub-lines 144 and is interlaced. The second signal transmission line 150 at the CR has a plurality of second branch lines 154, wherein the first branch line 144 extends in the first direction D1 and the second branch line 154 extends in the second direction D2. The insulating layer 160 is disposed between the first branch line 144 and the second branch line 154. In detail, in the embodiment, the first signal transmission line 140 includes a first main line 142, a plurality of first branch lines 144, and a second main line 146. The first branch line 144 is located at the first main line 142 and the second line. The main lines 146 are connected to each other, and the first branch lines 144 are respectively connected to the first main line 142 and the second main line 146. In other words, one end of each of the first branch lines 144 is connected to the first main line 142 and the other end is connected to the second main line 146. Therefore, the first main line 142 and the second main line 146 can be electrically connected by any one of the first branch lines 144. In the present embodiment, the first branch lines 144 are parallel to each other and extend in the first direction D1.

In this embodiment, the second signal transmission line 150 includes, for example, a third main line 152, a plurality of second branch lines 154, and a fourth main line 156. The third branch line 154 is located between the second main line 152 and the fourth main line 156. And each of the second branch lines 154 is connected to the third main line 152 and the fourth main line 156, respectively. In other words, one end of each of the second branch lines 154 is connected to the third main line 152 and the other end is connected to the fourth main line 156. Therefore, the third main line 152 and the fourth main line 156 can be electrically connected by any one of the second branch lines 154. In the present embodiment, the second branch lines 154 are parallel to each other and extend in the second direction D2. In particular, although in the present embodiment, the second branch line 154 is located above the first branch line 144, in other embodiments, the second branch line 154 may also be located below the first branch line 144.

Referring to FIG. 2C , in the embodiment, the liquid crystal display 100 further includes a conductive structure 136 disposed between the opposite substrate 130 and the pixel array substrate 110 , wherein the second signal transmission line 150 is transmitted through the conductive structure 136 . The common electrode layer 134 is electrically connected. In the present embodiment, the conductive structure 136 includes, for example, a conductive ball 136a and a conductive paste 136b surrounding the conductive ball 136a. The conductive ball 136a is, for example, a gold conductive ball (Au ball), and the conductive paste 136b is, for example, a silver paste. Of course, in other embodiments, the conductive structure 136 may also include a conductive post or other known conductive structure.

FIG. 3 is a schematic diagram showing driving waveforms of the liquid crystal display shown in FIG. 1A. Referring to FIG. 3, in the embodiment, the pixel is driven by a capacitively coupled driving (CC Driving) method, for example, the first signal transmission line 140 has an alternating voltage or a pulsed direct current voltage. The second signal transmission line 150 has, for example, a fixed DC voltage. In detail, the signal waveform diagram of the scan line is SG, the signal waveform of the first signal transmission line 140 is SC1, the signal waveform of the second signal transmission line 150 is SC2, and the signal waveform of the pixel element in the pixel is SP. In this embodiment, the voltage coupling effect between the pixel electrode and the corresponding common line 116 allows the voltage of the pixel electrode to be pulled up or pulled down by a voltage level after the scan line is enabled. For example, during t1, the scan line is enabled, and the signal waveform of the first signal transmission line 140 is a voltage value of SC1 having a low level, that is, a potential lower than the scan line, for example, 0V (volt). The pixel element is charged to V1, for example. Then, after the scan line is enabled, the signal waveform of the first signal transmission line 140 has a voltage value of SC1 at t2, that is, the signal waveform of the first signal transmission line 140 during the period of t1 is SC1. A potential, such as Va, can pull the voltage of the pixel electrode to (V1 + Va') through the storage capacitor.

Then, during the period of t3 in the next frame period, the scan line is again enabled, but the signal waveform of the first signal transmission line 140 is that the SC1 still has a high level voltage value, that is, the first signal transmission is higher than the t1 period. The signal waveform of line 140 is the SC1 potential, such as Va, at which point the pixel pixel in the pixel is charged to -V2, for example. Thereafter, after the scan line is enabled, the signal waveform of the first signal transmission line 140 is SC1. The voltage value at t4 is converted to a low-level voltage value, that is, lower than the potential of the scan line, for example, 0V (volts), which can pull the voltage of the pixel electrode down to (-V2-Va' through the storage capacitor. ).

As can be seen from the above, in the capacitively coupled driving (CC Driving) method, the capacitive coupling effect between the pixel electrode and the corresponding common line 116 allows the voltage of the pixel electrode to be enabled after the scanning line is terminated. Pull up or pull down a voltage level. In this way, the driving circuit only needs to provide a small data line voltage, and the voltage of the pixel electrode can be raised to a set value due to the coupling effect of the common line 116, so that the power consumption of the driving circuit can be saved. In particular, although the capacitive coupling driving method is taken as an example in the present embodiment, the present invention is not limited thereto. In other words, the liquid crystal display of the present invention is suitable for providing a difference between the common line and the common electrode. The way the voltage is driven.

In this embodiment, in order to input the signal to the common line 116 and the common electrode 132 respectively, the first signal transmission line 140 and the second signal transmission line 150 that provide the signal are formed on the first substrate 112 of the pixel array substrate 110. The first signal transmission line 140 and the second signal transmission line 150 may have at least one interlaced CR as shown in FIG. 1B. It is to be noted that the CR of the first signal transmission line 140 and the second signal transmission line 150 is susceptible to electrostatic discharge to break through the insulating layer 160 between the two, so that the first signal transmission line 140 and the second signal are transmitted. A short circuit occurs in line 150. In particular, in a liquid crystal display using a capacitive coupling driving method, in order to reduce the impedance of the signal transmission line, the area of the signal transmission line is designed to be large, but this causes the intersection of the two signal transmission lines to be easier. Electrostatic discharge occurs and the insulation between the traces is broken, causing a short circuit between the two signal traces. However, in the present embodiment, since the first signal transmission line 140 of the interlaced CR has a plurality of first branch lines 144, and the second signal transmission line 150 of the interlaced CR has a plurality of second branch lines 154, when the first When the signal transmission line 140 and the second signal transmission line 150 are short-circuited at the CR, the first branch line 144 may be separated from the remaining first branch line 144, or the second branch line 154 and the remaining The two legs 154 are isolated, so that the first signal transmission line 140 and the second signal transmission line 150 are electrically insulated. Therefore, the liquid crystal display 100 has a structure that is easy to repair and is suitable for using a capacitive coupling driving method.

4A is a top view showing a short circuit of a first branch line 144a of one of the first signal transmission lines 140 of the liquid crystal display 100 of FIG. 1B and a second branch line 154a of one of the second signal transmission lines 150. . 4B and FIG. 4C respectively show a top view of a repair method of a liquid crystal display, which is suitable for repairing the liquid crystal display 100 having the short-circuit 所示 shown in FIG. 4A. Referring to FIG. 4A, in the embodiment, a first branch line 144a of one of the first signal transmission lines 140 of the liquid crystal display 100 and an intersection of a second branch line 154a of one of the second signal transmission lines 150 are at, for example, The electrostatic discharge occurs to break through the insulating layer 160 between the two, so that the first signal transmission line 140 and the second signal transmission line 150 are short-circuited. Referring to FIG. 4B, in an embodiment, the repairing method includes cutting the first branch line 144a, such that the first branch line 144a is electrically insulated from the first signal transmission line 140, and thus the first signal transmission line 140 is The second signal transmission line 150 restores electrical insulation. Among them, the cutting method is, for example, laser cutting. In detail, after the first branch line 144a is cut, the first signal transmission line 140 and the second signal transmission line 150 are electrically insulated, and the first main line 142 and the second main line 146 of the first signal transmission line 140 are The first signal transmission line 140 and the second signal transmission line 150 have a normal function to provide a voltage to the common line 116 and the common electrode layer 134 respectively, so that the liquid crystal display device 100 can be electrically connected. normal display.

In another embodiment, as shown in FIG. 4C, the repairing method includes cutting the second branch line 154a, such that the second branch line 154a is electrically insulated from the second signal transmission line 150, and thus the first signal transmission line The 140 and the second signal transmission line 150 are electrically insulated. Among them, the cutting method is, for example, laser cutting. In detail, after the second branch line 154a of the second generation is cut, the first signal transmission line 140 and the second signal transmission line 150 are electrically insulated, and the third main line 152 and the fourth main line 156 of the second signal transmission line 150 are The first signal transmission line 140 and the second signal transmission line 150 have normal functions to respectively supply voltage to the common line 116 and the common electrode layer 134, so that the liquid crystal display device 100 can be electrically connected. normal display.

5A is a top view of a first branch line 144a of one of the first signal transmission lines 140 of the liquid crystal display 100 of FIG. 1B and a plurality of intersection points CP1 and CP2 of the second branch line 154a of the second signal transmission line 150. schematic diagram. FIG. 5B is a top view showing a repair method of a liquid crystal display, which is suitable for repairing a liquid crystal display having the short-circuit 所示 shown in FIG. 5A. Referring to FIG. 5A, the short-circuiting 瑕疵 occurs at a first intersection CP1 of the first branch line 144a and the second branch line 154a, and a second intersection CP2 of the first branch line 144b and the second branch line 154b. In the present embodiment, the cause of the short-circuiting is, for example, that the electrostatic discharge occurs at the first intersection CP1 and the second intersection CP2, respectively, and the insulating layer 160 is broken between the two, so that the first signal transmission line 140 and the second The signal transmission line 150 is shorted.

Referring to FIG. 5B, in the embodiment, the repairing method includes cutting the first branch line 144a having the first intersection CP1 such that the first branch line 144a where the turns occur is electrically insulated from the first signal transmission line 140. Next, the second branch line 154b having the second intersection CP2 is cut such that the second branch line 154b where the turns occur is electrically insulated from the second signal transmission line 150. As a result, the first signal transmission line 140 and the second signal transmission line 150 are electrically insulated, and the first main line 142 and the second main line 146 of the first signal transmission line 140 are supported by the remaining first branch lines 144, 144b. The first and second main lines 152 and 156 of the second signal transmission line 150 are electrically connected to each other. It has a normal function to supply voltage to the common line 116 and the common electrode layer 134, respectively, so that the liquid crystal display 100 can be normally displayed. Furthermore, in another embodiment (not shown), the second branch line 154a having the first intersection point CP1 and the first branch line 144b having the second intersection point CP2 may be cut so that the second branch line 154a of the defect occurs. The first signal transmission line 150 is electrically insulated from the second signal transmission line 150, and the first branch line 144b is electrically insulated from the first signal transmission line 140. In other words, in order to prevent the impedance of the first signal transmission line 140 or the second signal transmission line 150 from being excessively large, some of the plurality of first branch lines 144a, 144b in which the turns occur and the plurality of second branch lines 154a, 154b in which the cutting occurs may be cut. Some of them make the remaining first leg 144 and the second leg 154 have an appropriate number. Of course, in other embodiments, it is also possible to cut a plurality of first branch lines 144a, 144b that are generated in accordance with actual conditions or a plurality of second branch lines 154a, 154b that are both cut to occur.

In this embodiment, since the first signal transmission line 140 of the interlaced CR has a plurality of first branch lines 144, and the second signal transmission line 150 of the interlaced CR has a plurality of second branch lines 154, when interlaced CR The first leg 144 and the second leg 154 are short-circuited, and may be separated from the remaining first leg 144 by the first leg 144 of the occurrence of the turn, or the second leg 154 of the turn-off may be isolated from the remaining second leg 154. The first signal transmission line 140 and the second signal transmission line 150 are electrically insulated. In this way, the first signal transmission line 140 and the second signal transmission line 150 can respectively supply voltages to the common line 116 and the common electrode layer 134. In other words, the repair method of the liquid crystal display can easily repair the first signal transmission line and the second signal transmission line which are short-circuited at the staggered position, so that the liquid crystal display is restored from the abnormal display to the normal display without the need for the scrapped product, thereby greatly reducing The cost of manufacturing a liquid crystal display.

In summary, the liquid crystal display of the present invention includes a first signal transmission line and a second signal transmission line for respectively transmitting signals to the common line and the common electrode, wherein the first signal transmission line and the second signal transmission line have at least one interlace And the first signal transmission line located at the intersection has a plurality of first branch lines, and the second signal transmission line located at the intersection has a plurality of second branch lines. When the first branch line and the second branch line are short-circuited due to electrostatic discharge or the like, the first branch line or the second branch line where the flaw occurs may be isolated from the remaining branch lines by cutting the first branch line or the second branch line. In this way, the first signal transmission line and the second signal transmission line are electrically insulated, and the first signal transmission line and the second signal transmission line can normally transmit signals to the common line and the common electrode, so the liquid crystal display can be abnormal. The display returns to the normal display. In other words, the liquid crystal display has an easy-to-repair structure, which can avoid the scrapping of the liquid crystal display, thereby greatly reducing the manufacturing cost of the liquid crystal display. In particular, since the liquid crystal display is adapted to use a capacitive coupling driving method, the liquid crystal display has low power consumption characteristics and can be widely applied to mobile devices such as mobile phones.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . LCD Monitor

110. . . Pixel array substrate

112, 132. . . Substrate

112a. . . Display area

112b. . . Surrounding area

114. . . Pixel array

116. . . Shared line

130. . . Counter substrate

134. . . Common electrode layer

136. . . Conductive structure

136a. . . Conductive ball

136b. . . Conductive plastic

140, 150. . . Signal transmission line

142, 146, 152, 156. . . Main line

144, 144a, 144b, 154, 154a, 154b. . . Branch line

160. . . Insulation

170. . . Liquid crystal layer

182, 184. . . Conductive pad

D1, D2. . . direction

CR. . . Interlaced

CP, CP1, CP2. . . Intersection

SG, SC1, SC2, SP. . . Waveform

T1, t2, t3, t4. . . time

V1, -V2, Va, Va'. . . Voltage

1A is a cross-sectional view showing a liquid crystal display according to an embodiment of the present invention.

FIG. 1B is a top view of a liquid crystal display according to an embodiment of the invention.

2A is an enlarged schematic view of the CR at the staggered portion of FIG. 1B.

Fig. 2B is a schematic cross-sectional view taken along line I-I' of Fig. 2A.

2C is a partial cross-sectional view showing the second signal transmission line and the common electrode layer.

FIG. 3 is a schematic diagram showing driving waveforms of the liquid crystal display shown in FIG. 1A.

4A is a top view showing a short circuit of a intersection of a first branch line of one of the first signal transmission lines and a second branch line of one of the second signal transmission lines of the liquid crystal display of FIG. 1B.

4B is a top plan view showing a repair method of a liquid crystal display, which is suitable for repairing a liquid crystal display having the short-circuit 瑕疵 shown in FIG. 4A.

4C is a top plan view showing a repair method of a liquid crystal display, which is suitable for repairing a liquid crystal display having the short-circuit 所示 shown in FIG. 4A.

5A is a top view showing a short circuit of a plurality of intersections of a first branch line of one of the first signal transmission lines and a second branch line of one of the second signal transmission lines of the liquid crystal display of FIG. 1B.

FIG. 5B is a top view showing a repair method of a liquid crystal display, which is suitable for repairing a liquid crystal display having the short-circuit 所示 shown in FIG. 5A.

140, 150. . . Signal transmission line

142, 146, 152, 156. . . Main line

144, 154. . . Branch line

D1, D2. . . direction

Claims (17)

A liquid crystal display comprising: a pixel array substrate, comprising: a first substrate; a pixel array disposed on the first substrate; and a plurality of common lines disposed on the first substrate and located in the pixel a pair of the substrate, disposed opposite to the pixel array substrate, comprising: a second substrate; and a common electrode layer disposed on the second substrate; at least one first signal transmission line disposed at the The first substrate is electrically connected to the common lines; at least one second signal transmission line is disposed on the first substrate, and is electrically connected to the common electrode layer on the second substrate, the first signal transmission line The second signal transmission line has a different voltage, wherein the first signal transmission line and the second signal transmission line have at least one interlace, and the first signal transmission line at the interlace has a plurality of along a first direction An extended first branch line, and the second signal transmission line at the interlace has a plurality of second branch lines extending along a second direction different from the first direction; an insulating layer disposed on the first branch lines versus Some between the second leg; and a liquid crystal layer disposed between the counter substrate and the pixel array substrate. The liquid crystal display of claim 1, wherein the first substrate comprises a display area and a peripheral area, wherein the common lines are disposed in the display area and extend to the peripheral area, and the first signal transmission line configuration In the surrounding area. The liquid crystal display of claim 1, wherein the first signal transmission line comprises a first main line and a second main line, the first branch lines being located between the first main line and the second main line, and Each of the first branch lines is connected to the first main line and the second main line, respectively. The liquid crystal display of claim 3, wherein the first branch lines are parallel to each other. The liquid crystal display of claim 1, wherein the second signal transmission line comprises a third main line and a fourth main line, the second branch lines are located between the third main line and the fourth main line, and Each of the second branch lines is connected to the third main line and the fourth main line, respectively. The liquid crystal display of claim 5, wherein the second branch lines are parallel to each other. The liquid crystal display of claim 1, wherein the first direction is perpendicular to the second direction. The liquid crystal display of claim 1, further comprising a conductive structure disposed between the opposite substrate and the pixel array substrate, wherein the second signal transmission line passes through the conductive structure and the common electrode layer Electrical connection. The liquid crystal display of claim 8, wherein the conductive structure comprises a conductive ball or a conductive post. The liquid crystal display of claim 1, wherein the first signal transmission line has an alternating voltage, and the second signal transmission line has a fixed direct current voltage. A liquid crystal display repairing method, which is suitable for repairing a liquid crystal display according to claim 1, wherein a first branch of a first signal transmission line intersects with a second branch of a second signal transmission line When a short defect occurs, the repairing method includes: cutting the first branch line of the flaw, so that the first branch line of the occurrence of the flaw is electrically insulated from the first signal transmission line, or the cutting occurs. The second branch line electrically insulates the second branch line from the second signal transmission line, so that the first signal transmission line is electrically insulated from the second signal transmission line. The method for repairing a liquid crystal display according to claim 11, wherein the first signal transmission line comprises a first main line and a second main line, and the first branch lines are located at the first main line and the second main line. And the first branch lines are respectively connected to the first main line and the second main line. The method for repairing a liquid crystal display according to claim 11, wherein after the first branch of the cutting occurs, the first main line or the second main line transmits a signal via the remaining first branch lines. The method for repairing a liquid crystal display according to claim 11, wherein the second signal transmission line includes a third main line and a fourth main line, and the second branch lines are located at the third main line and the fourth main line. And each of the second branches is connected to the third main line and the fourth main line, respectively. The method for repairing a liquid crystal display according to claim 11, wherein after the second branch of the cutting occurs, the third main line or the fourth main line transmits a signal via the remaining second branch lines. The method for repairing a liquid crystal display according to claim 11, wherein the intersection of the occurrence includes a first intersection and a second intersection, the repairing method comprising: cutting the first branch having the first intersection, such that The first branch line is electrically insulated from the first signal transmission line; and the second branch line having the second intersection is cut such that the second branch line electrically separated from the second signal transmission line is electrically insulated. A liquid crystal display includes: a first substrate; a plurality of common lines disposed on the first substrate; a second substrate disposed opposite the first substrate; and a common electrode layer disposed on the second substrate The at least one first signal transmission line is disposed on the first substrate and extends along a first direction to electrically connect the common lines. The at least one second signal transmission line is disposed on the first substrate along a Different from the second direction extending in the first direction, electrically connected to the common electrode layer on the second substrate, the first signal transmission line and the second signal transmission line have different voltages, wherein the first signal transmission The line and the second signal transmission line have at least one interlace, the first signal transmission line at the interlace has a plurality of first branch lines, and the second signal transmission line at the interlace has a plurality of second branch lines An insulating layer disposed between the first branch lines and the second branch lines; and a liquid crystal layer disposed between the first substrate and the second substrate.