JP2001242488A - Liquid crystal display device and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystal display device, in which a route librating electromagnetic noise which enter into a repair wiring from a high speed signal to a GRD is secured and which is capable of reducing the effect of electromagnetic waves by connecting the the repair wiring, which is apt to be affected by the electromagnetic noise of the high speed signal and which is not used in restoring the disconnection and the short circuit to a grounding wiring, and to prevent its manufacturing method. SOLUTION: In a liquid crystasl display device, which is provided with an insulating substrate having, first wirings 1 which are arrangingly formed in a row direction and which are composed of plural lines of mutually insulated wirings and second wirings 2, which are formed arranged in a column direction orthogonal to the first wirings and which are composed of plural lines of mutually insulated wirings and with a repair wiring 9, which is formed on the insulating substrate or on the external circuit substrate connected to the insulating substrate and which is provided with respect to the first or the second wirings, the device has constitution in which the repair wiring 9 is grounded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a repair wiring for repairing a disconnection of a wiring such as a gate wiring or a source wiring, a short circuit between wirings or a short circuit between wirings and electrodes, and manufacturing thereof. It is about the method.

[0002]

2. Description of the Related Art A non-linear active element (for example, a thin film transistor (hereinafter referred to as "TFT") provided in each pixel of a liquid crystal display device.
Called. The driving method for controlling the voltage applied to the liquid crystal layer according to the above method is referred to as active matrix driving, and a liquid crystal display device employing this driving method is referred to as an active matrix liquid crystal display device. In active matrix driving, a phenomenon called crosstalk caused by display signal voltage leakage of non-selected pixels can be significantly improved as compared with simple matrix driving, and it is expected that a decrease in contrast due to a large screen can be avoided. ing. A TFT array substrate of a liquid crystal display device having a TFT mounted thereon has a plurality of gate lines arranged and arranged in a row direction on an insulating substrate and a plurality of lines arranged in a column direction intersecting the row lines via an insulating film. Source wiring, a common wiring that is arranged in the same layer and in parallel with the gate wiring and intersects with the source wiring via an insulating layer for the purpose of securing an auxiliary capacitance, and is surrounded by the gate wiring and the source wiring. A pixel electrode disposed in the region and a TFT disposed at an intersection of a gate line and a source line and electrically connected to the pixel electrode.

Hereinafter, in a conventional liquid crystal display device, T
A method of repairing a case where a disconnection occurs in a source wiring on an FT array substrate will be described with reference to FIG. In the case where the drain bus line 13 has a disconnection portion 20, the drain bus line 13 where the disconnection portion 20 exists and the disconnection repair line 12
The intersection between the drain bus line 13 and the wire for repairing disconnection 12 is formed by using a so-called laser welding method in which the intersection between
Connect at Next, the peripheral connection 15 and the resistor 19, the disconnection repairing wiring 12, and the drain bus line 13 are cut at a cutting portion 22 indicated by a dashed line in the drawing. Next, although not shown, after the individual tabs 16 are electrically opened, tabs including the tabs provided at the ends of the disconnection repairing wires 12 are performed, and the tabs are punched. The provided tab and the other wire for repairing disconnection 12
Is connected to the periphery of the glass substrate 11 by a jumper wire. In the actual driving, by applying a drive voltage to the tab of the disconnection repairing wiring 12, the voltage is applied from both sides to the drain bus line 13 having the disconnection portion 20. Is disclosed in Japanese Patent Laid-Open No. 9-2
No. 74199.

[0004]

However, the conventional repair wiring is used for repairing a line defect caused by disconnection or short circuit, and when repair is performed, a data signal is applied to the repair wiring. Is not performed, a floating state where no signal is applied is obtained. Generally, such a floating wiring is susceptible to external electromagnetic waves. The number in the peripheral circuit of the liquid crystal display device tens MH _Z
A large number (several tens) of signal lines are arranged, and the repair wiring has a structure that is easily susceptible to the electromagnetic noise of these high-speed signals. Further, since the repair wiring is arranged as a detour of the data signal for the purpose of use, the routing distance is long, and the repair wiring is likely to be a radiation source (antenna) of electromagnetic waves. The present invention has been made to solve the above problems,
It is an object of the present invention to provide a liquid crystal display device that can be easily repaired when disconnection or short circuit of a gate wiring or a source wiring occurs, and a method for manufacturing the same. Another object of the present invention is to provide a liquid crystal display device in which a repair wiring does not enter a floating state when a disconnection or a short circuit does not occur in a gate wiring or a source wiring, and a method for manufacturing the same.

[0005]

According to the present invention, there is provided a liquid crystal display device having a first wiring composed of a plurality of wirings arranged in a row direction and insulated from each other, and a column intersecting the first wiring. An insulating substrate having a second wiring composed of a plurality of wirings insulated from each other in the direction, and formed on an insulating substrate or an external circuit board connected to the insulating substrate or the first or second wiring. In a liquid crystal display device provided with a repair wiring for the second wiring, the repair wiring is grounded.

In the liquid crystal display device according to the present invention, the repair wiring is grounded via a connection member formed on the external circuit board.

In the liquid crystal display device according to the present invention, the repair wiring is connected to a ground wiring provided on an insulating substrate or an external circuit board connected to the insulating substrate.

The liquid crystal display device according to the present invention also has a first wiring composed of a plurality of mutually insulated wirings arranged in a row direction and an array formed in a column direction intersecting the first wirings. A first or second wiring formed on an insulating substrate having a second wiring composed of a plurality of wirings insulated from each other, an insulating substrate or an external circuit board connected to the insulating substrate; , The repair wiring is connected to a power supply.

In the liquid crystal display device according to the present invention, the repair wiring is connected to a power supply via a connection member formed on the external circuit board.

In the liquid crystal display device according to the present invention, a first wiring composed of a plurality of wirings which are arranged and formed in a row direction and are insulated from each other, and an array formed in a column direction which intersects the first wiring. Is formed on an insulating substrate having a second wiring composed of a plurality of wirings mutually insulated, an insulating substrate or an external circuit board connected to the insulating substrate, and the first or second wiring In a liquid crystal display device having a repair wiring, the repair wiring is connected to a common electrode wiring, a Vcom potential wiring, or a counter electrode.

In the liquid crystal display device according to the present invention, the repair wiring is connected to the Vcom potential wiring via a connecting member formed on the external circuit board.

In the liquid crystal display device according to the present invention, the connection member has a zero ohm chip resistance.

In the method for manufacturing a liquid crystal display device according to the present invention, a first wiring composed of a plurality of wirings arranged in a row direction and mutually insulated intersects with the first wiring via an insulating film. A second wiring composed of a plurality of wirings arranged in the column direction and insulated from each other is formed on an insulating substrate, and the first wiring or the second wiring intersects with the second wiring via an insulating film. A step of connecting both ends of the disconnected wiring to the repair wiring when the first wiring or the second wiring is disconnected, and connecting the repair wiring to the ground wiring when forming the wiring by connecting to the ground wiring; And a step of cutting off.

According to the method of manufacturing a liquid crystal display device of the present invention, the repair wiring and the ground wiring are connected to each other via a connecting member. The method includes a step of connecting both ends of the disconnected wiring and the repair wiring, and a step of removing the connection member from the external circuit board.

The method of manufacturing a liquid crystal display device according to the present invention further comprises a first wiring composed of a plurality of wirings arranged in a row direction and insulated from each other, and a first wiring through an insulating film. A second wiring composed of a plurality of wirings arranged in the intersecting column direction and mutually insulated is formed on the insulating substrate, and the second wiring intersects with the first wiring or the second wiring via the insulating film. A step of connecting both ends of the disconnected wiring to the repair wiring when the first wiring or the second wiring is disconnected, and connecting the repair wiring to the power supply. And a step of cutting off.

In the method for manufacturing a liquid crystal display device according to the present invention, the repair wiring is formed by connecting to a power supply via a connecting member. And connecting the repair wiring to both ends of the wiring and removing the connection member from the external circuit board.

The method of manufacturing a liquid crystal display device according to the present invention further comprises a first wiring composed of a plurality of wirings arranged in a row direction and insulated from each other, and a first wiring through an insulating film. A second wiring composed of a plurality of wirings arranged in the intersecting column direction and mutually insulated is formed on the insulating substrate, and the second wiring intersects with the first wiring or the second wiring via the insulating film. Connecting the repair wiring to the common electrode wiring, the Vcom potential wiring or the counter electrode, and connecting both ends of the broken wiring to the repair wiring when the first wiring or the second wiring is broken. And disconnecting the repair wiring from the common electrode wiring, the Vcom potential wiring or the counter electrode.

In the method of manufacturing a liquid crystal display device according to the present invention, the repair wiring is connected to the Vcom potential wiring via a connecting member, and is formed when the first wiring or the second wiring is disconnected. And a step of connecting both ends of the disconnected wiring and the repair wiring, and a step of removing the connection member from the external circuit board.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 One embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a panel capable of repairing disconnection and short-circuit of the source wiring is assumed. FIG. 1 shows an example of a circuit diagram of a TFT array substrate of an active matrix liquid crystal display device to which the present invention is applied. The circuit configuration shown in FIG. 1 is a so-called Cs on gate method in which a storage capacitor Cs is formed by a pixel electrode and a gate wiring. Here, reference numeral 1 denotes a gate line for supplying a scanning voltage in which a plurality of lines are arranged at equal intervals and in parallel in a row direction, and 2 denotes a plurality of lines at equal intervals and in a column direction crossing the gate line 1 via an insulating film. A TFT 3 used as a switching element for applying a voltage to the liquid crystal is disposed at each intersection of a source line for supplying signal voltages arranged in parallel, a gate line 1 and a source line 2. Reference numeral 4 denotes a liquid crystal capacitor which is equivalent to a liquid crystal that performs light transmission / non-transmission switching and is represented by a capacitance. Reference numeral 5 denotes a storage capacitor arranged in parallel with the liquid crystal capacitor 4 to reduce the influence of the parasitic capacitance of the TFT. Is a common electrode that connects one electrode of the liquid crystal capacitor 4 to a common voltage, and 7 is a tape carrier package (tape car) that connects an external circuit on the gate side to the gate wiring 1.
rier package, hereinafter referred to as “TCP”. ), 8 is a source terminal for connecting to the source side external circuit and the source wiring 2 using TCP or the like, and 9 is a repair terminal used when the source wiring is disconnected or short-circuited. (Hereinafter, referred to as “repair wiring”), and 10 is a wiring for the repair wiring formed on the external circuit board and the repair wiring formed on the TFT array substrate.
This is a repair terminal for connection using a CP or the like.

In the above description, the Cson gate structure in which the storage capacitor 5 is formed between the next-stage or previous-stage gate wiring has been described. However, as shown in the circuit diagram of FIG. May be formed as a common wiring structure formed separately from the gate wiring. Here, the storage capacitor 5 is connected to the common wiring 11. Further, the common wiring 11 is connected to the common wiring lead line 1 through the contact hole 12.
3 is connected. A common voltage is applied from the outside via a common wiring terminal 14 connected to the common wiring lead line 13. The functions and reference numerals of the other parts are the same as those in FIG. In the common wiring method, it is best that the common wiring 11 is formed simultaneously with the same material as the gate wiring 1, and the common wiring lead line 13 has at least an intersection with the gate wiring 1 at a source wiring in a different layer from the gate wiring. 2 material is used. In some cases, the common wiring lead line may be formed of the gate wiring material except for the intersection with the gate wiring. A liquid crystal display panel is formed after a liquid crystal is injected by combining a counter substrate on which a color filter is formed so as to face the TFT array substrate. FIG. 3 is a graph showing the T shown in FIG. 1 or FIG.
It is a top view of the wiring part of the TFT array board | substrate with the external circuit board (printed board and TCP are similarly collectively similarly hereafter) which connected the FT array board to the printed board via TCP.

In FIG. 3, reference numeral 15 denotes a TCP on which an integrated circuit (IC) for driving a liquid crystal is mounted;
The printed board 16 and the TFT array board are connected to the electrodes of the CP 15. The repair wiring 9 is formed on the TFT array substrate and the external circuit board, and the intersection of the repair wiring 9 and the source wiring 2 on the TFT array substrate is interposed through an insulating film. , "Normal state") are insulated between these wirings.
Here, the repair wiring on the TFT array substrate is formed in the same layer as the gate wiring 1 using, for example, a gate wiring material. Also, taking the Cs on gate method as shown in FIG. 4 as an example, at the intersection of the repair wiring 9 and the source wiring 2, the source wiring is connected to the contact holes 17 a and 1.
7b, the gate wiring 1 is formed of a gate wiring material.
The wiring may be once converted to a wiring of the same layer. At this time, the repair wiring 9 is formed using a source wiring material.

As shown in FIG. 5, the source wiring 2 may be converted to the same material as the gate wiring through the contact hole 17b and connected to the source terminal 8. In this case, for example, when the protective film is thin, moisture enters through the pinhole, and the terminal portion 8 existing outside the seal portion is formed.
Corrosion of the source wiring in the vicinity can be prevented. As described above, several wiring methods for repair wiring have been described, but it is not necessary to limit to this. Further, as shown in FIG. 3, in a normal state, the repair wiring 9 on the printed circuit board 16 is connected to a power supply potential having a small impedance such as a ground potential. In the present embodiment, the printed circuit board 12
A ground wire 18 is formed on the upper portion, and the ground wire 18 is connected to the repair wire 9 via a zero ohm chip resistor 19.
Is connected to In such a configuration, the repair wiring can be eliminated from the floating state even in the normal state, and the electromagnetic noise entering the repair wiring from the high-speed signal can be reduced to GN.
Since a path to escape to D is secured, electromagnetic radiation from the repair wiring can be reduced as compared with the floating state.

A method for repairing a disconnection of a source wiring according to the present embodiment will be described below. In this configuration, when a disconnection occurs in the source wiring 2 on the TFT array substrate, the intersection of the source wiring and the repair wiring in which the disconnection has occurred is irradiated with laser to connect these wirings. The printed circuit board 16
By removing the zero ohm chip resistor 19 connected by the upper solder, the connection with the ground wiring 18 is opened. As a result, the data signal of the column wiring drive circuit is applied to the source wiring after the disconnection via the repair wiring, and the line defect can be repaired. In the above repair method, the disconnection failure was described.
When a short circuit occurs with a gate wiring, a common wiring, and the like (hereinafter, referred to as “other wiring”) and a gate electrode, a common electrode, a counter electrode, and the like (hereinafter, referred to as a “short-circuit electrode”), a short-circuited source is generated. Since the data signal output from the column electrode driving circuit and the signal supplied to the other wiring or the short-circuit electrode that is short-circuited are applied to the wiring, a desired voltage is not applied to the column wiring as a result. A line defect will result. With respect to this short-circuit failure, the short-circuit portion is cut, or one short-circuit wire near the short-circuit portion is cut, and the short-circuit wire is disconnected.

In this embodiment, the connection of the repair wiring and the ground wiring on the peripheral circuit board is switched by the zero ohm chip resistor. However, the switching can be performed by a switch capable of switching between open and short. According to this method, it is possible to more easily cope with the presence or absence of the repair. still,
The use of a zero ohm chip resistor or a switch that can switch between open and short circuit is used for the connection between the repair wiring and the ground wiring. In a normal state, the repair wiring can be eliminated in a floating state without using a switch capable of switching between resistance and open or short, and a path for releasing electromagnetic noise entering the repair wiring from a high-speed signal to GND is secured. Therefore, electromagnetic radiation from the repair wiring can be reduced as compared with the floating state. Further, in the present embodiment, the repair wiring and the ground wiring on the peripheral circuit board are connected at one place by using a zero ohm chip resistor. However, in general, when the number of connection places is increased, a path for releasing electromagnetic noise to GND increases. In addition, the effect of reducing electromagnetic radiation is greater. Further, in the present embodiment, the repair wiring on the printed circuit board is connected to the ground wiring. However, even if the repair wiring is connected to any of the input power supply, the column electrode drive circuit power supply, and the row electrode drive circuit power supply other than the ground wiring, Can be expected to be reduced. In the present embodiment, the liquid crystal display device capable of repairing disconnection and short-circuiting of the column wiring has been described. However, a similar repair wiring can be provided for the row wiring and repaired.

Embodiment 2 The difference between the configuration of the array substrate according to the present embodiment and the configuration of the array substrate described in the first embodiment is a difference in the manner in which the repair wiring is routed, and the other parts are basically the same. Is partially omitted. FIG.
FIG. 9 is a plan view of a wiring portion of an array substrate with an external circuit board that constitutes a liquid crystal display device according to another embodiment of the present invention.
In this embodiment, it is assumed that the panel is capable of repairing disconnection and short-circuit of column wiring. 6, the same reference numerals in the drawings used in the description of the first embodiment denote the same parts. The repair wiring 9 is arranged only on the array substrate, and the intersection between the repair wiring 9 and the source wiring 2 is interposed via an insulating layer, and these wirings are insulated in a normal state. The Vcom potential applied to the common electrode on the array substrate and the opposing electrode 20 on the opposing substrate is generated by a peripheral circuit on the printed circuit board 16, and is transferred onto the array substrate through circuits such as TCP 15 and FPC. The signal is input to a common electrode wiring 21 formed of a metal thin film of Cr, Al, or the like, and further applied to the common electrode and the counter electrode 20.

In this embodiment, the repair common electrode wiring 2
2 and the repair wiring 9 on the array substrate are made of ITO, Cr, Al
And so on. In such a structure, the repair wiring 9 can be eliminated in a floating state, and a path for releasing electromagnetic noise entering the repair wiring 9 from a high-speed signal to the Vcom potential wiring 23 is secured. Electromagnetic radiation from wiring can be reduced. The method for repairing the disconnection of the source wiring according to the present embodiment will be described below. In this configuration, when a disconnection occurs in the source wiring 2 on the array substrate, the intersection of the source wiring and the repair wiring in which the disconnection has occurred is irradiated with laser to connect these wirings. Further, a laser is applied to the repair common electrode wiring 22, which is a connection portion between the counter electrode 20 and the repair wiring 9, to open the connection of these wirings. As a result, the data signal of the column electrode drive circuit is applied to the source wiring after the disconnection via the repair wiring,
Line defects can be repaired. In the above repair method, a disconnection failure was described. However, when the source wiring is short-circuited between the source wirings, other wirings, and the short-circuit electrode, the short-circuited portion is cut, or one of the short-circuited wires near the short-circuited portion is cut and the short-circuit is performed. The wiring is disconnected, and the same state as the disconnection failure is performed, and the same repair as the disconnection failure is performed. In the present embodiment, the repair wiring is connected to the common electrode wiring in the normal state. However, the repair wiring may be similarly connected to the ground wiring, the input electrode, the row electrode driving circuit power supply or the column electrode driving circuit power supply. It is possible to eliminate the wiring in a floating state. In this embodiment mode, a liquid crystal display device capable of repairing disconnection and short-circuit of a source wiring has been described. However, a similar repair wiring can be provided for a gate wiring to repair the same.

Embodiment 3 The difference between the configuration of the array substrate according to the present embodiment and the configuration of the array substrate described in the first embodiment is a difference in the manner in which the repair wiring is routed, and the other parts are basically the same. Is partially omitted. FIG.
FIG. 9 is a plan view of a wiring portion of an array substrate with an external circuit board that constitutes a liquid crystal display device according to another embodiment of the present invention.
In this embodiment, it is assumed that the panel is capable of repairing disconnection and short-circuit of column wiring. 7, the same reference numerals in the drawings used in the description of the first and second embodiments indicate the same parts.
The repair wiring 9 is arranged on an array substrate and an external circuit substrate,
The intersection between the repair wiring 9 and the source wiring 2 on the array substrate is interposed through an insulating layer, and these wirings are insulated in a normal state. The Vcom potential applied to the common electrode on the array substrate and the counter electrode 20 on the counter substrate is generated by a peripheral circuit on the printed circuit board 16, and the TCP 15, F
Through circuits such as PC, ITO, Cr,
The signal is input to a common electrode wiring 21 formed of a metal thin film of Al or the like, and further applied to the common electrode and the counter electrode 20.

In this embodiment, the repair common electrode wiring 2
2 and the repair wiring 9 on the array substrate are made of ITO, Cr, Al
And so on. In such a structure, the repair wiring 9 can be eliminated in a floating state, and a path for releasing electromagnetic noise entering the repair wiring 9 from a high-speed signal to the Vcom potential wiring 23 is secured. Electromagnetic radiation from wiring can be reduced. The method for repairing the disconnection of the source wiring according to the present embodiment will be described below. In this configuration, when a disconnection occurs in the source wiring 2 on the array substrate, the intersection of the source wiring and the repair wiring in which the disconnection has occurred is irradiated with laser to connect these wirings. Further, a laser is applied to the repair common electrode wiring 22, which is a connection portion between the counter electrode 20 and the repair wiring 9, to open the connection of these wirings. As a result, the data signal of the column electrode drive circuit is applied to the source wiring after the disconnection via the repair wiring,
Line defects can be repaired. In the above repair method, a disconnection failure was described. However, when the source wiring is short-circuited between the source wirings, other wirings, and the short-circuit electrode, the short-circuited portion is cut, or one of the short-circuited wires near the short-circuited portion is cut and the short-circuit is performed. The wiring is disconnected, and the same state as the disconnection failure is performed, and the same repair as the disconnection failure is performed. In the present embodiment, the liquid crystal display device capable of repairing disconnection and short-circuit of the source wiring has been described. However, it is also possible to provide repair wiring for the gate wiring and repair the same.

Embodiment 4 The difference between the configuration of the array substrate according to the present embodiment and the configuration of the array substrate described in the first embodiment is a difference in the manner in which the repair wiring is routed, and the other parts are basically the same. Is partially omitted. FIG.
FIG. 9 is a plan view of a wiring portion of an array substrate with an external circuit board that constitutes a liquid crystal display device according to another embodiment of the present invention.
In the present embodiment, a panel capable of repairing disconnection and short-circuit of the source wiring is assumed. 8, the same reference numerals in the drawings used in the description of the first, second, and third embodiments denote the same parts. The repair wiring 9 is arranged on the array substrate and the external circuit board, and the intersection of the repair wiring 9 and the source wiring 2 on the array substrate is interposed via an insulating layer, and these wirings are insulated in a normal state. The Vcom potential applied to the common electrode on the array substrate and the counter electrode 20 on the counter substrate is generated by a peripheral circuit on the printed circuit board 16,
15. IT on the array substrate through circuits such as FPC
The signal is input to a common electrode wiring 21 formed of a metal thin film of O, Cr, Al or the like, and further applied to a common electrode and a counter electrode 20.

In this embodiment, the repair common electrode wiring 2
2 and the repair wiring 9 on the array substrate are made of ITO, Cr, Al
And so on. In such a structure, the repair wiring 9 can be eliminated in a floating state, and a path for releasing electromagnetic noise entering the repair wiring 9 from a high-speed signal to the Vcom potential wiring 23 is secured. Electromagnetic radiation from wiring can be reduced. Furthermore, in addition to this, the printed circuit board 1
6, the Vcom potential wiring 23 having the same potential as the common electrode wiring 21 and the repair wiring 9 are connected via the zero ohm chip resistor 19 to increase the number of connection points between the repair wiring 9 and the Vcom potential wiring 23. A greater effect can be expected on the reduction of electromagnetic radiation than in the third embodiment.

The method of repairing the disconnection of the source wiring according to the present embodiment will be described below. In this configuration, when a disconnection occurs in the source wiring 2 on the array substrate, a laser is applied to the intersection between the source wiring and the repair wiring in which the disconnection has occurred,
Connect these wirings. The repair common electrode wiring 22, which is a connection portion between the counter electrode 20 and the repair wiring 9, is irradiated with a laser to open the connection of these wirings. Furthermore, the zero ohm chip resistor 1 on the printed circuit board 16
9 is removed to open the connection with the Vcom potential wiring 23. Thus, the data signal of the column electrode driving circuit is applied to the source wiring after the disconnection via the repair wiring, and the line defect can be repaired. In the repair method described above, the disconnection failure was described. However, when the source wiring is short-circuited between the source wirings, another wiring and the short-circuit electrode, the short-circuited portion is cut or one of the short-circuited wires near the short-circuited portion is cut and the short-circuit is performed. The wiring is disconnected, and the same state as the disconnection failure is performed, and the same repair as the disconnection failure is performed. In the present embodiment, the connection of the repair wiring and the Vcom potential wiring on the peripheral circuit board is switched by the zero ohm chip resistor. However, it is also possible to switch by a switch capable of switching between open and short. If it is a method, it can respond to the presence or absence of repair more easily.

The connection between the repair wiring and the Vcom potential wiring uses a zero ohm chip resistor or a switch capable of switching between open and short, so that the disconnection and the short circuit can be easily repaired. Without using a zero ohm chip resistor or a switch that can switch between open and short, the repair wiring can be eliminated in a floating state in a normal state, and the electromagnetic noise entering the repair wiring from a high-speed signal is Vcom. Since a path to escape to the potential wiring is secured, electromagnetic radiation from the repair wiring can be reduced as compared with the floating state. Further, in the present embodiment, the repair wiring and the Vcom potential wiring on the peripheral circuit board are connected at one place using a zero ohm chip resistor. However, in general, when the number of connection points is increased, electromagnetic noise is released to the Vcom potential wiring. The number of paths is increased, and the effect of reducing electromagnetic radiation is greater.

In the present embodiment, the liquid crystal display device capable of repairing the disconnection and short-circuit of the source wiring has been described. However, it is also possible to provide a repair wiring for the gate wiring and repair the same. The present invention is based on TN (Twi)
In addition to the liquid crystal display device of the sted Nematic mode, the IPS (In-plane switch)
g) The present invention can be applied to any display device having a repair wiring in a mode or the like.

[0034]

As described above, according to the present invention, in the manufacture of the liquid crystal display device, when no disconnection or short circuit occurs in the gate wiring and the source wiring, the repair wiring is grounded to repair the wiring. Electromagnetic radiation from the wiring can be suppressed, and the EMI of the liquid crystal display device can be reduced. In addition, by previously connecting to the ground wiring via a zero-ohm chip resistor, it is possible to easily repair a disconnection or a short circuit in the gate wiring and the source wiring. Further, in the manufacture of the liquid crystal display device, when no disconnection or short circuit occurs in the gate wiring and the source wiring, the repair wiring is connected to a power supply such as an input power supply, a row electrode drive circuit power supply or a column electrode drive circuit power supply. By doing so, the electromagnetic radiation from the repair wiring can be suppressed, and the EMI of the liquid crystal display device can be reduced. Further, in the manufacture of a liquid crystal display device, when disconnection or short circuit does not occur in the gate wiring and the source wiring, it is possible to suppress the electromagnetic radiation from the repair wiring by connecting the repair wiring to the common electrode wiring. Thus, EMI of the liquid crystal display device can be reduced. In addition, if the column wiring and the row wiring are disconnected or short-circuited, they can be easily repaired by connecting them to the Vcom potential wiring via a zero-ohm chip resistor in advance.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a TFT array substrate showing a Cs on gate method.

FIG. 2 is a circuit diagram of a TFT array substrate showing a common wiring method.

FIG. 3 is a plan view of an array board with an external circuit board according to the first embodiment of the present invention.

FIG. 4 is a circuit diagram showing an example of an intersection between a source wiring and a repair wiring.

FIG. 5 is a circuit diagram showing another example of an intersection between a source wiring and a repair wiring.

FIG. 6 is a plan view of an array board with an external circuit board according to a second embodiment of the present invention.

FIG. 7 is a plan view of an array board with an external circuit board according to a third embodiment of the present invention.

FIG. 8 is a plan view of an array board with an external circuit board according to a fourth embodiment of the present invention.

FIG. 9 is an explanatory view of a conventional wire for repairing disconnection.

[Explanation of symbols]

1 gate wiring, 2 source wiring, 3 TFT 4
Liquid crystal capacitance, 5 storage capacitance, 6 common electrode, 7
Gate terminal, 8 source terminals, 9 repair wiring, 1
0 repair terminal, 11 common wiring, 12 contact hole, 13 common wiring lead line, 14 common wiring terminal, 15 TCP, 16 printed circuit board, 17a
Contact hole, 17b Contact hole, 18
Ground wiring, 19 zero ohm chip resistor, 20
Counter electrode, 21 common electrode wiring, 22 repair common electrode wiring, 23 Vcom potential wiring.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2H092 JA24 JB73 JB74 MA48 MA52 NA25 5C094 AA42 AA43 AA60 BA03 BA43 CA19 DA13 DB01 DB02 DB04 DB05 EA04 EA05 EA10 EB02 FA01 FB12 GB10 JA05 5G435 AA00 AA17 BB12 KK10 KK12 KK

Claims (14)

[Claims] 1. A first wiring comprising a plurality of wirings arranged and arranged in a row direction and mutually insulated, and a plurality of wirings arranged and formed in a column direction intersecting the first wiring and mutually insulated. An insulating substrate having a second wiring consisting of book wiring,
In the liquid crystal display device formed on the insulating substrate or an external circuit board connected to the insulating substrate and provided with a repair wire for the first or second wire, the repair wire is grounded. Liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein the repair wiring is grounded via a connecting member formed on the external circuit board. 3. The liquid crystal display device according to claim 1, wherein the repair wiring is connected to a ground wiring provided on the insulating substrate or an external circuit board connected to the insulating substrate. 4. A first wiring composed of a plurality of wirings formed in a row direction and mutually insulated, and a plurality of wirings formed in a column direction intersecting with the first wiring and formed in a mutually insulated manner. An insulating substrate having a second wiring consisting of book wiring,
In a liquid crystal display device formed on the insulating substrate or an external circuit board connected to the insulating substrate and provided with a repair wire for the first or second wire, the repair wire is connected to a power supply A liquid crystal display device characterized by the above-mentioned. 5. The liquid crystal display device according to claim 4, wherein the repair wiring is connected to a power supply via a connection member formed on the external circuit board. 6. A first wiring composed of a plurality of wirings which are arranged and formed in a row direction and mutually insulated, and a plurality of wirings which are arranged and formed in a column direction intersecting with the first wiring and are mutually insulated. An insulating substrate having a second wiring consisting of book wiring,
In a liquid crystal display device formed on the insulating substrate or an external circuit board connected to the insulating substrate and provided with a repair wire for the first or second wire, the repair wire is a common electrode wire, a Vcom potential wire. Alternatively, the liquid crystal display device is connected to a counter electrode. 7. The liquid crystal display device according to claim 6, wherein the repair wiring is connected to the Vcom potential wiring via a connecting member formed on the external circuit board. 8. The liquid crystal display device according to claim 2, wherein the connection member is a zero ohm chip resistor. 9. A first wiring composed of a plurality of wirings arranged in a row direction and mutually insulated, and a first wiring arranged in a column direction intersecting with said first wiring via an insulating film, and mutually insulated. A second wiring composed of a plurality of wirings is formed on an insulating substrate, and a repair wiring crossing the first wiring or the second wiring via an insulating film is connected to a ground wiring. A step of connecting both ends of the broken wire and the repair wire when the first wire or the second wire is broken, and connecting the repair wire and the ground wire. And a step of cutting off the liquid crystal display device. 10. A method of manufacturing a liquid crystal display device in which a repair wiring and a ground wiring are connected to each other via a connecting member, wherein when the first wiring or the second wiring is broken, both ends of the broken wiring are connected to the both ends. The method for manufacturing a liquid crystal display device according to claim 9, further comprising: a step of connecting to a repair wiring; and a step of removing the connection member from an external circuit board. 11. A first wiring comprising a plurality of wirings arranged in a row direction and mutually insulated, and a first wiring arranged in a column direction intersecting with said first wiring via an insulating film, and mutually insulated. A second wiring composed of a plurality of wirings is formed on an insulating substrate, and a repair wiring crossing the first wiring or the second wiring via an insulating film is connected to a power supply. In the method for manufacturing a liquid crystal display device to be formed, when the first wiring or the second wiring is disconnected, a step of connecting both ends of the disconnected wiring and the repair wiring, and a step of connecting the repair wiring and the power supply. And a disconnecting step. 12. A method of manufacturing a liquid crystal display device, wherein a repair wiring is formed by connecting to a power supply via a connecting member.
12. The method according to claim 11, further comprising: when disconnecting the first wiring or the second wiring, connecting both ends of the disconnected wiring and the repair wiring, and removing the connection member from an external circuit board. The manufacturing method of the liquid crystal display device according to the above. 13. A first wiring composed of a plurality of wirings arranged in a row direction and mutually insulated, and a first wiring arranged in a column direction intersecting said first wiring via an insulating film, and mutually insulated. A second wiring composed of a plurality of wirings formed on an insulating substrate, and a repair wiring crossing the first wiring or the second wiring via an insulating film, a common electrode wiring,
In the method for manufacturing a liquid crystal display device formed by connecting to a Vcom potential wiring or a counter electrode, when disconnecting the first wiring or the second wiring, connecting both ends of the disconnected wiring and the repair wiring, Disconnecting the connection between the repair wiring and the common electrode wiring, the Vcom potential wiring or the counter electrode. 14. A method of manufacturing a liquid crystal display device in which a repair wiring is connected to a Vcom potential wiring via a connecting member via a connecting member, wherein when the first wiring or the second wiring is broken, both ends of the broken wiring are connected to each other. A method for manufacturing a liquid crystal display device, comprising: a step of connecting the repair wiring; and a step of removing the connection member from an external circuit board.