JPH11142874A - Liquid crystal display - Google Patents

Abstract

(57) Abstract: In a liquid crystal display device, an active element is protected from static electricity generated during a manufacturing process, and a display defect such as a point defect is prevented from occurring. SOLUTION: On a first substrate 10 side of a liquid crystal display device 1, antistatic wirings 91, 9 are provided for signal lines 11 on both sides.
2 are arranged in parallel, and the discharge terminals 93 and 94 face the ends 910 and 920 of the wiring at an interval smaller than the interval between the first mounting terminal 82 and the second mounting terminal 83. I have. Ends 910, 92 of antistatic wiring 91, 92
A point is formed at the terminal 0 or the pair of discharge terminals 93 and 94. For this reason, static electricity is supplied to the static electricity countermeasure wirings 91 and 9.
2 is discharged preferentially between the end portions 910 and 920 and the discharge terminals 93 and 94, and discharge occurs between the first mounting terminal 82 and the second mounting terminal 83 connected to the signal line 11. Absent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a liquid crystal display device. More specifically, the present invention relates to a technique for protecting an active element from static electricity generated in a manufacturing process of a liquid crystal display device.

[0002]

2. Description of the Related Art In a liquid crystal display device using an MIM element,
As shown in FIG. 1, two transparent first and second substrates 10 and 20 (glass substrates) are fixed to face each other with a gap (cell gap) of several μm therebetween.
0 is enclosed. Among them, a large number of signal lines 11 are formed on the first substrate 10 in the column direction.
In the display area 101 of the first substrate 10, a MIM (Metal Insulator Meteor) is provided at a constant pitch.
tal) elements 12 (active elements) and pixel electrodes 13 connected to the MIM elements 12 are arranged in a matrix. On the other hand, on the second substrate 20, transparent data lines are formed as strip-shaped counter electrodes 22. After the first and second substrates 10 and 20 are respectively formed on a large-sized insulating substrate capable of taking a large number of them,
It is bonded in the state of a large insulating substrate, and then divided.

Here, as shown in FIGS. 12 and 13, on the first substrate 10 side, a plurality of first mounting terminals 82 to which each of the signal lines 11 is connected, and the plurality of first mounting terminals 82 A plurality of second terminals facing the mounting terminal 82 on the outer peripheral side of the substrate
The first and second mounting terminals 82 and 83 are used to mount a driving IC 80 (semiconductor integrated circuit) that outputs a scanning signal to the signal line 11 and the like. A flexible printed wiring board FPC is connected to the ends of the plurality of second mounting terminals 83 by wiring. Although not shown, a driving IC for outputting an image signal to the counter electrode 22 is also mounted on the second substrate 20.

[0004]

However, in the liquid crystal display device, until the driving IC 80 and the like are mounted,
In a rubbing process for aligning the liquid crystal 30 or a break process for dividing a large insulating substrate, static electricity is easily generated on the first substrate 10, and the generated static electricity is MIM.
There is a problem that the element 12 is damaged. Such damage to the MIM element 12 causes display defects such as point defects. In particular, in a liquid crystal display device using an MIM element, since the insulating film of the MIM element 12 is thin, the MIM element 12 is easily damaged by static electricity.

[0005] In view of the above problems, an object of the present invention is to provide:
It is an object of the present invention to propose a configuration of a liquid crystal display device that can protect an active element from static electricity generated during a manufacturing process and prevent a display defect such as a point defect from occurring.

[0006]

According to the present invention, there is provided a display area in which a plurality of first wirings and a pixel electrode connected to each of the first wirings via an active element are formed. A non-display area surrounding the display area, a plurality of first mounting terminals connected to each of the first wirings in the non-display area, and a plurality of the first mounting terminals facing the outer peripheral side of the substrate. A first substrate having a plurality of second mounting terminals, and a second substrate in which a liquid crystal is sandwiched between the first substrate and a counter electrode for driving the liquid crystal between the first substrate and the pixel electrode.
A first wiring, wherein the first substrate is arranged in parallel with the first wiring in the non-display area and is arranged so as to sandwich the display area; The end of the second wiring is opposed to the end of the second wiring at a position on the outer peripheral side of the first substrate with respect to the second mounting terminal, and the first mounting terminal and the second mounting are located between the end and the end. And a third terminal that is easier to discharge than the terminal.

In the present invention, the second wiring is arranged so as to sandwich the formation region of the first wiring from both sides, and the third terminal is arranged so as to sandwich the second mounting terminal from both sides. A first mounting terminal connected to the first wiring and a second mounting terminal facing the mounting terminal are provided between an end of the second wiring and a third terminal facing the end. The discharge is more likely to occur than during the period. For this reason, static electricity generated during the manufacture of the liquid crystal display device is preferentially discharged from the third terminal to the second wiring, and the static electricity enters the first wiring and is discharged from the second mounting terminal to the first wiring. No discharge to the mounting terminals occurs. Therefore, since the active element can be protected from static electricity generated during the manufacturing process, it is possible to prevent a display defect such as a point defect from occurring. In addition, the second wiring can be formed simultaneously with the first wiring, and the third terminal can be formed simultaneously with the second mounting terminal. There is no need to increase the number of manufacturing steps to form. Further, the second wiring and the third terminal are formed in the non-display area to the last and only effectively use the non-display area, so that the display area does not need to be narrowed. In addition, since the second wiring and the third terminal can be left as they are, the active element can be protected from static electricity generated in the final step of the liquid crystal display device.

In the present invention, a space between an end of the second wiring and the third terminal facing the end is the first mounting terminal and the second mounting terminal facing the mounting terminal. In making the discharge easier than in the case of, for example, the following configuration is adopted.

First, the distance between the end of the second wiring and the third terminal facing the end is determined by the distance between the first mounting terminal and the second mounting terminal facing the mounting terminal. Make it smaller than the interval. According to this structure, the distance between the end of the second wiring and the third terminal is smaller than the distance between the first mounting terminal and the second mounting terminal connected to the first wiring. Discharge easily occurs between the end of the second wiring and the third terminal.

Further, at least one of the end of the second wiring and the third terminal opposed to the end may have a pointed tip directed to the other side. If such a point exists, an electric field concentrates on the point, so that discharge easily occurs between the end of the second wiring and the third terminal.

[0011] Further, at least one of the end of the second wiring and the third terminal facing the end is provided with a pointed tip toward the other side, and the end of the second wiring is provided. The distance between the portion and the third terminal facing the end may be smaller than the distance between the first mounting terminal and the second mounting terminal facing the mounting terminal.

According to the present invention, the width of the end of the second wiring is made wider than the width of the first mounting terminal,
It is preferable that the width of the terminal is wider than the width of the second mounting terminal so that static electricity is more preferentially discharged between the second wiring and the third terminal. .

In the present invention, the third terminal may be formed as a dummy pattern for countermeasures against static electricity, but the third terminal is also used for mounting a semiconductor integrated circuit in the same manner as the second mounting terminal. May be used as terminals.

[0014]

Embodiments of the present invention will be described with reference to the drawings.

[Overall Configuration] FIGS. 1 and 2 show, respectively,
1 is a schematic configuration diagram of a liquid crystal display device using an MIM element as an example of a liquid crystal display device to which the present invention is applied, and a cross-sectional view schematically illustrating the configuration.

In FIG. 1, in a liquid crystal display device 1 using an MIM element, transparent first and second substrates 10 and 20 are provided.
(Glass substrate) are bonded to each other with a gap of several μm therebetween, and the liquid crystal 30 is sealed in the gap. As described below, the first and second substrates 10,
The ends of the first and second substrates 20 are protruded from the ends of the other substrate, and the driving IC 80 is mounted on the end of the first substrate 10 by using the protruding portions. A mounting area 81 for wiring connection of a substrate (not shown) is formed. Although not shown, a driving IC is mounted by using a portion of the second substrate 10 protruding from an end of the first substrate 10, and a flexible printed wiring board (not shown) is connected by wiring. .

A large number of signal lines 11 (first wirings) serving as scanning lines or data lines are formed in parallel on the first substrate 10 and connected to these signal lines 11 at a constant pitch. The MIM element 12 (active element) and the M
Pixel electrode 1 connected to signal line 11 via IM element 12
3 are arranged in a matrix. These MIMs
An area where the element 12 and the pixel electrode 13 are formed is a display area 101 to be a display screen.
The area surrounding 01 on the outer peripheral side is the non-display area 102.

The second substrate 20 has an ITO film (Indium Tin Oxi) as a data line or a scanning line.
de), a transparent strip-shaped counter electrode 22 is formed. Regarding the positional relationship between the color filter 21 and the counter electrode 22, any one of them may be an upper layer or a lower layer.

In the liquid crystal display device 1 configured as described above,
The signal line 11 (first wiring) and the counter electrode 22 substantially cross each other, and the liquid crystal 30 is disposed between the pixel electrode 13 and the counter electrode 22 for each pixel corresponding to the crossing portion.
Is in a state where the liquid crystal cell 31 is configured.

Polarizing plates 19 and 29 are optically orthogonally arranged outside the first and second substrates 10 and 20, and the polarizing plate 29 functions as an analyzer. A backlight unit of a direct type or an edge light type is disposed below the polarizing plate 19, and as shown in FIG.
, A light guide plate 72 for guiding light from the fluorescent lamp 71 toward the insulating substrate 10, and a diffusion plate 73 for the light guide plate 72. In the edge light type backlight unit 70, the fluorescent lamps 71 may be arranged at respective positions corresponding to two opposing sides of the insulating substrate 10.

As shown in FIG. 2, in the liquid crystal display device 1,
A gap material 41 made of plastic beads is interposed between the first and second substrates 10 and 20, and the gap material 41 is crushed by the two insulating substrates 10 and 20 while the two insulating substrates are crushed. The cell gap between 10 and 20 is defined to be uniform in the in-plane direction. The illustration of the color filters is omitted. Such a state is held by the cured sealing material 50. A liquid crystal 30 is sealed inside the sealing material 50, and a liquid crystal cell 31 is formed between the pixel electrode 13 and the counter electrode 22 with an alignment film 60 interposed therebetween. The liquid crystal 30 is, for example, an alignment film 60 or a TN-type liquid crystal that is aligned at a predetermined twist angle and a pretilt angle by a rubbing process.

[Configuration of MIM Substrate] FIGS. 3A and 3B
3A and 3B are a cross-sectional view and a plan view of the MIM element, respectively.

As shown in FIG. 3A, the MIM element 12
Now, the tantalum electrode 1 is formed on the surface of the transparent first substrate 10 on which the underlying protective film 120 such as a tantalum oxide film is formed.
21 (lower electrode) is formed, and a tantalum oxide film 122 is formed on the surface by anodic oxidation. A chromium electrode 123 (upper electrode) is formed on the surface of the tantalum oxide film 122. The chrome electrode 123 and the tantalum electrode 121 face each other with the tantalum oxide film 122 interposed therebetween.
The MIM element 12 is configured. A transparent pixel electrode 13 made of an ITO film is formed on the surface side of the chrome electrode 123, and the MIM element 12 can address the liquid crystal cell 31 corresponding to the pixel electrode 13 and write information in the liquid crystal cell 31. . Here, instead of the chromium electrode, an ITO film may be used as the upper electrode, and may be formed integrally with the pixel electrode. In this case, the step of forming the second electrode and the pixel electrode can also be performed, and a part of the manufacturing step can be omitted. Note that the tantalum electrode 121 is formed as a part of the signal line 11 as shown in FIG.
Chrome wiring 125 on the surface side of the tantalum oxide film 122
Are formed.

[Configuration of Mounting Area] FIG. 4 is a plan view showing a state where the first and second substrates 10 and 20 are bonded together.

As shown in FIG. 4, the first substrate 10 and the second substrate
The substrate 20 is staggered with each other, and a slightly inner region (a region surrounded by a dotted line L) of the overlapping portion is a display region 101, and an outer peripheral side thereof is a non-display region 102.
It is. In the non-display area 102, the second substrate 20
The signal line 1 is located in the lower end region of the first substrate
One end is collected, and a plurality of first mounting terminals 82 are formed using the end of each signal line 11. The plurality of first mounting terminals 82 are formed on the outer peripheral edge 1 of the first substrate 10.
05, are arranged along the outer peripheral edge 105 in an area slightly inside. In addition, a plurality of second mounting terminals 83 are formed on the first substrate 10 in a region outside the first mounting terminals 82 (on the outer peripheral edge 105 side), and these second mounting terminals 83 are also formed by the first mounting terminals 83. Are arranged along the outer peripheral edge 105 of the substrate 10. Therefore, the second mounting terminal 83 and the first mounting terminal 8
2 is in a state of facing each other.

Using the first and second mounting terminals 82 and 83 thus configured, as shown in FIG.
The driving IC 80 that outputs the scanning signal to the bump electrode 8
9 will be implemented. A flexible printed wiring board FPC is provided at an end of the plurality of second mounting terminals 83 with an ACF (anisotropic conductive film: Anisotrope).
ic Conductive Film).

Such first and second mounting terminals 8
2 and 83 are formed simultaneously with the signal line 11, the MIM element 12, and the pixel electrode 13 by using a process of forming the same, and the underlying protective film 120 of the first substrate 10 is formed.
Tantalum film 1 formed simultaneously with signal line 11 on the surface of
1'11 ", anodic oxide films 122 'and 122" and chromium films 123' and 12 for the tantalum film 11'11 ".
3 "and an ITO film 13 ', 13" are laminated in this order.

[Method of Manufacturing Liquid Crystal Display] A method of manufacturing the liquid crystal display 1 will be briefly described with reference to FIG.

When manufacturing the liquid crystal display device 1 of this embodiment, first, the signal line 11, the MIM element 12, the pixel electrode 13, and the transparent large insulating substrate 100 as shown in FIG. First mounting terminal 82 and second mounting terminal 8
3 and the like are formed (see FIGS. 3A, 3B, 4 and 5). First, a tantalum thin film having a thickness of about 1500 angstroms is formed on the surface side of the large substrate 100, and then the tantalum thin film is patterned by a photolithography technique to form a tantalum electrode 12 of the MIM element 12.
1 and signal line 11 (first and second mounting terminals 8
2, 83 tantalum films 11 'and 11 ").
For example, the tantalum thin film is also left as a power supply unit (not shown) along the upper side of the large-sized insulating substrate 100, and this power supply unit is in a state of being electrically connected to each signal line 11. Next, the large-sized insulating substrate 100 is immersed in an anodic oxidation bath containing phosphoric acid or the like, and anodic oxidation is performed on the tantalum electrode 121 and the signal line 11 in the oxidizing bath. As a result, the tantalum electrode 1
A tantalum oxide film 122 having a thickness of about 500 angstroms (first and second
Tantalum films 122 ', 122 "of the mounting terminals 82, 83
Is formed. Annealing is performed on the tantalum oxide film 122 at a temperature of 300 ° C. to 400 ° C. Next, after a chromium film having a thickness of about 800 Å is formed on the surface of the large-sized insulating substrate 100, patterning is performed by a photolithography technique, and the chromium wiring 125 and the chrome electrode 123 (the first and second mounting terminals 82, 83 chrome films 123 'and 123 ")
To form Next, the surface of the large-sized insulating substrate 100 is coated with ITO.
After the film is formed, patterning is performed by a photolithography technique, and the pixel electrode 13 made of an ITO film (the ITO film 13 'of the first and second mounting terminals 82, 83, 1', 1 ') is formed.
3 ") in the form of a matrix. In the meantime, the first and second mounting terminals 82, 8 which have been integrated up to that point are left.
3 is etched, and as shown in FIG. 5, independent first and second mounting terminals 8 are formed.
Divide into 2,83.

Next, a rubbing process is performed on the large-sized insulating substrate 100 after forming an alignment film 60 of polyimide or the like. Next, after applying the sealing material 50, a gap material 41 made of plastic beads is sprayed (FIG. 2).
reference).

On the other hand, a large-sized insulating substrate 200 different from the large-sized insulating substrate 100 includes a color filter 21 and a counter electrode 22.
(See FIGS. 1 and 2). Next, the large insulating substrate 20
After the alignment film 60 such as polyimide is formed on the substrate 0, a rubbing process is performed, and then the large-sized insulating substrate 200 is bonded to the large-sized insulating substrate 100.

The two large insulating substrates 100 and 20
In a state in which “0” is bonded, as shown in FIG. 6B, the substrate is cut into strip-shaped bonded substrates 300 (primary break step). Here, since a discontinuous portion is formed in the sealing material 50 at a portion corresponding to the side of the bonded substrate 300, the liquid crystal 30 is injected under reduced pressure into the inner region of the sealing material 50, and then the discontinuous portion is removed. Seal.

Next, the strip-like bonded substrate 300 is
Each of the first and second substrates 10 and 20 shown in FIG. 1 is cut into a shape (secondary break step). Here, in the large-sized insulating substrate 100, the tantalum film corresponding to the signal line 11 of the divided first substrate 10 corresponds to each first substrate 10 for the purpose of performing anodic oxidation at once. The tantalum film is cut in the secondary break step because the tantalum film is connected over the region where the tantalum film is formed. Therefore,
As shown in FIG. 4, the signal line 11 has a structure reaching the outer peripheral edge 106 on the upper side of the first substrate 10. And
On the first substrate 10, the driving IC 80 is mounted using the first and second mounting terminals 82 and 83 protruding from the end of the second substrate 20, and the flexible printed wiring board FPC is connected by wiring. Although not shown, a driving IC is mounted on a portion of the second substrate 20 protruding from an end of the first substrate 10.

In the process of manufacturing the liquid crystal display device 1 in this manner, until the driving IC 80 and the like are mounted,
Static electricity is generated on the first substrate 10 in a rubbing process for aligning the liquid crystal 30 and a primary break process in which the large-sized insulating substrates 100 and 200 are divided into strip-shaped bonded substrates 300. Also, static electricity is generated on the first substrate 10 in the secondary break process. Since the static electricity generated in this way damages the MIM element 12 and causes display defects such as point defects, the present invention takes the following measures against static electricity.

[Embodiment 1] As a countermeasure against static electricity, the present embodiment employs the structure shown in FIGS. FIG.
Is the first substrate 1 used in the liquid crystal display device 1 according to the present embodiment.
FIG. 7 is an enlarged plan view of a mounting area 81 of No. 0;

As shown in FIG. 4, in the present embodiment, the non-display area 102 of the first substrate 10 has a static electricity with respect to the signal lines (first wiring) 11 on both sides so as to sandwich the display area 101. Countermeasure wires (second wires) 91 and 92 are arranged in parallel. Each of these antistatic lines 91 and 92 is formed with the help of the process of forming the signal line 11,
It has the same structure as 1. In addition, these antistatic lines 91 and 92 reach the outer peripheral edge 106 on the upper side of the first substrate 10, similarly to the signal lines 11. Further, like the signal lines 11, the antistatic wirings 91 and 92 are gathered in the mounting area 81 in the non-display area 102 of the first substrate 10, and as shown in FIG. The ends 910 and 920 are located on both sides of the first mounting terminal 82.

In the mounting area 81, discharge terminals (third terminals) 93 and 94 are formed on both sides of the second mounting terminal 83, and each of the discharge terminals 93 and 94 is provided with an antistatic wiring. Opposite ends 910 and 920 of 91 and 92. Such discharge terminals 93 and 94 are formed with the help of the formation process of the second mounting terminal 83, and have the structure shown in FIG.

Here, the distance d1 between the ends 910 and 920 of the antistatic wiring 91 and 92 and the discharge terminals 93 and 94 facing the ends 910 and 920 is the first.
Mounting terminals 82 and second mounting terminals 82 facing these mounting terminals 82.
Is smaller than the distance d2 between the mounting terminal 83 and the mounting terminal 83. That is, 2
Each of the two discharging terminals 93 and 94 is about 0.3 mm larger than the second mounting terminal 83,
End 910, 920 side. Therefore,
In the present embodiment, the end portions 910 of the antistatic wirings 91 and 92,
Discharge is easier between the first mounting terminal 82 and the second mounting terminal 83 than between the first mounting terminal 82 and the second mounting terminal 83 between the first mounting terminal 82 and the discharge terminals 93 and 94 facing the ends 910 and 920. Further, the width W ₁ of the end portions 910 and 920 of the antistatic wiring 91 and 92 is wider than the width W ₂ of the first mounting terminal 82 and the discharge terminal 9
If the width W ₃ of the _third and _fourth terminals 94 is made wider than the width W ₄ of the second mounting terminal, the antistatic lines 91 and 92 and the discharge terminals 93 and 9 are formed.
4, the first mounting terminal 82 and the second mounting terminal 8
3 and easier to discharge.

In the liquid crystal display device 1 configured as described above, the antistatic lines 91 and 92 are formed so as to sandwich the formation region of the signal line 11 from both sides, and the discharge terminals 93 and 94 are formed.
Are formed so as to sandwich the second mounting terminal 83 from both sides. In addition, static electricity countermeasure wires 91 and 92 and discharge terminals 9 are provided.
3 and 94, the discharge is easier than between the first mounting terminal 82 and the second mounting terminal 83. For this reason, static electricity generated during the manufacture of the liquid crystal display device 1 is discharged to the discharge terminals 9.
3 and 94 are discharged to the antistatic wiring 91 and 92 preferentially, so that the second mounting terminal 83 to the first mounting terminal 8
No discharge to 2. Therefore, static electricity does not enter the signal line 11. Therefore, since the MIM element 12 can be protected from static electricity generated during the manufacturing process, the occurrence of display defects such as point defects can be prevented. In addition, static electricity countermeasure wires 91 and 92 and discharge terminals 93,
Since the signal line 94 can be formed simultaneously with the signal line 11 and the second mounting terminal 83, it is not necessary to increase the number of manufacturing steps to form the antistatic lines 91 and 92 and the discharge terminals 93 and 94. . Further, the antistatic lines 91 and 92 and the discharge terminals 93 and 94 are formed only in the non-display area 102 and only effectively use the non-display area 102. Therefore, the display area 101 needs to be narrowed. There is no. In addition, since the antistatic lines 91 and 92 and the discharging terminals 93 and 94 can be left as they are until the end, the MIM is also prevented from the static electricity generated in the final process of the liquid crystal display device 1.
The element 12 can be protected.

The end portions 9 of the antistatic wiring 91, 92
10, 920 and the discharge terminals 93, 94 have the same structure as the first and second mounting terminals 82, 83, respectively.
The bonding of the driving IC 80 and the wiring connection of the flexible printed circuit board FPC may be performed in the same manner as in 83. That is, the discharge terminals 93 and 94 may be configured by complete dummy wirings, but the two outermost terminals of the plurality of second mounting terminals 83 are connected to the discharge terminals 93 and 94.
The configuration used as 94 may be used.

[Modification of Embodiment 1] As shown in FIG. 8, the end portions 910 and 920 of the antistatic wirings (second wirings) 91 and 92 are set to discharge terminals more than the first mounting terminals 82. (Third terminal) The end 9 of the antistatic wiring 91, 92 is extended to the side of 93, 94 by about 0.3 mm.
The distance d1 between the first mounting terminal 82 and the second mounting terminal 83 facing these mounting terminals 82 is determined by the distance d1 between the first mounting terminal 82 and the discharging terminals 93 and 94 respectively facing the ends 910 and 920. The distance d2 is smaller than the distance d2, so that the discharge is more likely to occur between the antistatic wiring 91 and 92 and the discharge terminals 93 and 94 than between the first mounting terminal 82 and the second mounting terminal 83. Is also good.

[Embodiment 2] In this embodiment, a structure shown in FIGS. 4 and 9 is adopted as a countermeasure against static electricity. FIG.
Is the first substrate 1 used in the liquid crystal display device 1 according to the present embodiment.
FIG. 7 is an enlarged plan view of a mounting area 81 of No. 0; In this embodiment, since the overall configuration of the liquid crystal display device 1 described above, the basic configuration of the mounting area 81, and the basic principle of countermeasures against static electricity are the same as those of the above-described first embodiment, they are common. Portions having functions are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 4, also in the present embodiment, the non-display area 102 of the first substrate 10 has the anti-static wiring 9
1, 92 are arranged in parallel. These two antistatic lines 91 and 92 are also provided on the first substrate 1 like the signal lines 11.
0, and are collected in the mounting area 81 of each
The ends 910 and 920 of the 92 are located on both sides of the first mounting terminal 82. Also, discharge terminals 93 and 94 are formed on both sides of the second mounting terminal 83, and these discharge terminals 9 and 94 are formed.
3 and 94 are end portions 9 of the antistatic wiring 91 and 92, respectively.
Confronting 10,920.

Here, the ends 910 and 920 of the antistatic wirings 91 and 92 and the ends of the discharge terminals 93 and 94 which face the ends 910 and 920, respectively, from one side to the other. Protruding tip 911, 92
1, 931 and 941 are formed respectively.

According to such a configuration, for example, the ends 910 and 920 of the antistatic wiring 91 and 92 and the discharge terminals 93 facing the ends 910 and 920, respectively.
The distance d1 between the first mounting terminal 82 and the second mounting terminal 83 facing these mounting terminals 82 is d2.
, The ends 91 of the antistatic wiring 91, 92
0, 920 and the discharge terminals 93, 94 have sharp points 91.
1, 921, 931 and 941 are formed between the antistatic wiring 91 and 92 and the discharge terminals 93 and 94 more than between the first mounting terminal 82 and the second mounting terminal 83. Discharge easily occurs. In addition, antistatic wiring 91,
The width W ₁ of the end portion 910, 920 of the 92 first mounting terminal 8
Wider than the width W ₂ of 2, and, if the width W ₃ of the discharging terminals 93 and 94 wider than the width W ₄ of the second mounting terminal, between the ESD protection wires 91 and 92 and the discharging terminals 93 and 94 In this case, discharge is easier than between the first mounting terminal 82 and the second mounting terminal 83.

Therefore, in this embodiment, static electricity generated during the manufacture of the liquid crystal display device is preferentially discharged from the discharge terminals 93 and 94 to the static electricity countermeasure wires 91 and 92.
Is not discharged from the mounting terminal 83 to the first mounting terminal 82. Therefore, static electricity does not enter the signal line 11. Therefore, static electricity generated during the manufacturing process reduces MI
An effect similar to that of the first embodiment can be obtained, for example, by protecting the M element 12 and preventing a display defect such as a point defect from occurring.

The end portions 9 of the antistatic wiring 91 and 92
10, 920 and the discharge terminals 93, 94 have the same structure as the first and second mounting terminals 82, 83, and therefore these parts are used for bonding of the driving IC 80 and wiring connection of the flexible wiring board FPC. What can be used is the same as in the first embodiment.

As countermeasures against static electricity, the ends 910 and 920 of the antistatic wires 91 and 92 and the discharge terminals 9 are provided.
Even when a point is formed only on one of the third and the fourth 94, it is possible to easily cause discharge at this point.

[Embodiment 3] In this embodiment, FIGS.
The structure shown in FIG. FIG. 10 shows a mounting area 81 of the first substrate 10 used in the liquid crystal display device 1 according to the embodiment.
FIG. In this embodiment, since the overall configuration of the liquid crystal display device 1 described above, the basic configuration of the mounting area 81, and the basic principle of countermeasures against static electricity are the same as those of the above-described embodiment, common functions are provided. Are denoted by the same reference numerals, and detailed description thereof will be omitted.

Also in this embodiment, as shown in FIG. 4, in the non-display area 102 of the first substrate 10, the anti-static wiring 9
1, 92 are arranged in parallel. These two antistatic lines 91 and 92 also have a mounting area 81 similar to the signal line 11.
And the end portions 91 of the antistatic wirings 91 and 92
0 and 920 are located on both sides of the first mounting terminal 82. The discharge terminals 93 and 9 are provided on both sides of the second mounting terminal 83.
4 are formed, and these discharge terminals 93 and 94 face the ends 910 and 920 of the antistatic wiring 91 and 92, respectively.

Here, the distance d1 between the ends 910 and 920 of the antistatic wiring 91 and 92 and the discharge terminals 93 and 94 respectively facing the ends 910 and 920 is the same as in the first embodiment. Is smaller than the distance d2 between the mounting terminals 82 and the second mounting terminals 83 facing the mounting terminals 82. That is, both of the two discharge terminals 93 and 94 are provided with electrostatic protection lines 91 and 9 more than the second mounting terminal 83.
2 end 910, 920. Further, in the present embodiment, the end portions 910, 9 of the antistatic wiring 91, 92
20 and the ends of the discharge terminals 91 and 92 facing the ends 910 and 920, respectively, similarly to the second embodiment, the sharp ends 91 projecting from one side toward the other.
1, 921, 931 and 941 are formed respectively.

According to such a configuration, the ends 910 and 920 of the antistatic wiring 91 and 92 and the discharge terminals 91 and 9
2 is shorter than the distance d2 between the first mounting terminal 82 and the second mounting terminal 83, and the ends 910, 920 of the antistatic wiring 91, 92 and the discharging terminal 9
The first mounting terminal 82 and the second mounting terminal are provided between the static electricity countermeasure wirings 91 and 92 and the discharge terminals 93 and 94 by the pointed portions 911, 921, 931 and 941 formed on the third and third terminals 94. The electric discharge is more likely to occur than between the two.

Therefore, in the present embodiment, static electricity generated during the manufacture of the liquid crystal display device 1 is preferentially discharged from the discharge terminals 93 and 94 to the static electricity countermeasure wirings 91 and 92, so that the second mounting terminal 83 From the first mounting terminal 82. Therefore, static electricity does not enter the signal line 11. Therefore, static electricity generated during the manufacturing process can reduce M
An effect similar to that of the first embodiment can be obtained, for example, by protecting the IM element 12 and preventing a display defect such as a point defect from occurring.

The end portions 9 of the antistatic wiring 91 and 92
10, 920 and the discharge terminals 93, 94 have the same structure as the first and second mounting terminals 82, 83, and therefore these parts are used for bonding of the driving IC 80 and wiring connection of the flexible wiring board FPC. What can be used is the same as in the first and second embodiments.

As countermeasures against static electricity, the ends 910 and 920 of the antistatic wires 91 and 92 and the discharge terminals 9 are provided.
Even in the case where the pointed portion is formed only in one of the third and the fourth portions 94, the discharge can be easily caused in this portion as in the second embodiment.

[Other Embodiments] FIG.
As shown in (B), the first substrate 10 of the liquid crystal display device 1
Then, drive IC and flexible printed wiring board FP
There are cases where the area for mounting C is configured as two mounting areas 81A and 81B, and also in this case, the first mounting terminal 82 and the second mounting terminal 83 are formed in the respective mounting areas 81A and 81B. Also in the case of such a configuration, antistatic wirings 91 and 92 are arranged in parallel in the non-display area 102 of the first substrate 10 with respect to the signal lines 11 on both sides so as to sandwich the display area 101. Each end 9 of
10 and 920 are arranged outside the endmost first mounting terminal 82. Further, discharge terminals 93 and 94 are arranged outside the endmost second mounting terminal 83. Here, the ends 910 and 920 of the antistatic wiring 91 and 92 and the discharge terminals 93 and 9 facing the ends 910 and 920, respectively.
4 and the first mounting terminals 82 and these mounting terminals 8.
If the same structure as in the first to third embodiments is adopted, for example, by making the distance smaller than the distance between the second mounting terminal 83 facing the second and the second mounting terminal 83, static electricity generated during the manufacture of the liquid crystal display device 1 will It can be prevented from getting into people.

In the first to third embodiments, the antistatic lines 91 and 92 can be connected to the active element just like the signal line 11, but the antistatic lines 91 and 92 are formed. Since the region is a non-display region, the portion corresponding to the pixel electrode is not an ITO film but a light-shielding film such as chrome.

In the embodiment described above,
Although the MIM element has been exemplified as the active element, the present invention is not limited to this. For example, a TFT (thin film transistor)
In the case of a liquid crystal display device using elements, a discharge terminal and an antistatic wiring may be provided on the outer peripheral side of the substrate of external input terminals of gate lines and source lines corresponding to scanning lines or data lines which are signal lines.

[0059]

As described above, in the liquid crystal display device according to the present invention, the second wiring is arranged so as to sandwich the formation region of the first wiring from both sides, and the third terminal is formed by the second mounting. The terminals are arranged so as to sandwich them from both sides. In addition, between the end of the second wiring and the third terminal facing the end,
Discharge is more likely to occur than between the first mounting terminal connected to the first wiring and the second mounting terminal facing the mounting terminal. For this reason, static electricity generated during the manufacture of the liquid crystal display device is preferentially discharged from the third terminal to the second wiring, and does not enter the first wiring from the second mounting terminal. Therefore, since the active element can be protected from static electricity generated during the manufacturing process, it is possible to prevent a display defect such as a point defect from occurring. Further, the second wiring is formed simultaneously with the first wiring,
Since the third terminal can be formed simultaneously with the second mounting terminal, it is not necessary to increase the number of manufacturing steps to form the second wiring and the third terminal. Also, the second
The wiring and the third terminal are formed in the non-display area to the last and only effectively use the non-display area, so that the display area does not need to be narrowed. Further, since the second wiring and the third terminal can be left as they are, the active element can be protected from static electricity generated in the final step of the liquid crystal display device.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a liquid crystal display device to which the present invention is applied.

FIG. 2 is a cross-sectional view of the liquid crystal display device shown in FIG.

FIG. 3 is an explanatory diagram of an MIM element configured on a first substrate of the liquid crystal display device shown in FIG.

FIG. 4 is a plan view of the liquid crystal display device shown in FIG.

5 is a cross-sectional view of a mounting terminal formed on a first substrate of the liquid crystal display device shown in FIG.

FIG. 6 is a process chart for explaining a process of manufacturing the liquid crystal display device shown in FIG. 1 from a large substrate.

FIG. 7 is an enlarged plan view of a mounting area of a first substrate used in the liquid crystal display device according to the first embodiment of the present invention.

FIG. 8 is an enlarged plan view of a mounting area of a first substrate used in a liquid crystal display device according to a modification of the first embodiment of the present invention.

FIG. 9 is an enlarged plan view of a mounting area of a first substrate used in a liquid crystal display device according to Embodiment 2 of the present invention.

FIG. 10 is an enlarged plan view of a mounting area of a first substrate used in a liquid crystal display device according to Embodiment 3 of the present invention.

FIGS. 11A and 11B are a plan view illustrating another configuration example of the first substrate of the liquid crystal display device to which the present invention is applied, and an enlarged plan view of a mounting area thereof.

FIG. 12 is a plan view of a conventional liquid crystal display device.

FIG. 13 is an enlarged plan view of a mounting area of a conventional liquid crystal display device.

[Explanation of symbols]

 Reference Signs List 1 liquid crystal display device 10 first substrate 11 signal line 12 MIM element (active element) 13 pixel electrode 20 second substrate 22 counter electrode 30 liquid crystal 31 liquid crystal cell 80 driving IC 81 mounting area 82 first mounting terminal 83 first 2 mounting terminals 91, 92 Antistatic wiring 93, 94 Discharge terminals 100, 200 Large insulating substrate 101 Display area 102 Non-display area 300 Strip-shaped bonded substrate 910, 920 Ends of antistatic wiring 911, 921, 931 , 941 FPC Flexible Printed Wiring Board

Claims (7)

[Claims] A display region formed with a plurality of first wirings, a pixel electrode connected to each of the first wirings via an active element, a non-display region surrounding the display region, and a non-display region surrounding the display region. A first substrate including a plurality of first mounting terminals to which each of the first wiring is connected, and a plurality of second mounting terminals facing the plurality of first mounting terminals on an outer peripheral side of the substrate; A second electrode in which a liquid crystal is sandwiched between the first substrate and a counter electrode for driving the liquid crystal between the pixel electrode and the first substrate;
A first wiring, wherein the first substrate is arranged in parallel with the first wiring in the non-display area, and is arranged so as to sandwich the display area; The end of the second wiring is opposed to the end of the second wiring at a position on the outer peripheral side of the first substrate with respect to the second mounting terminal, and the first mounting terminal and the second mounting are located between the end and the end. A liquid crystal display device having a third terminal which is easier to discharge than the terminal. 2. The device according to claim 1, wherein an interval between an end of the second wiring and the third terminal facing the end is the first mounting terminal and the second mounting terminal facing the mounting terminal. The distance between the end of the second wiring and the third terminal facing the end faces the first mounting terminal and the mounting terminal by being smaller than the distance between the mounting terminal and the mounting terminal. A liquid crystal display device wherein discharge is easier than between the second mounting terminal and the second mounting terminal. 3. The device according to claim 1, wherein at least one of the end of the second wiring and the third terminal facing the end has a pointed end toward the other side. Discharge between the end of the second wiring and the third terminal facing the end is lower than between the first mounting terminal and the second mounting terminal facing the mounting terminal. A liquid crystal display device which is easily configured. 4. The terminal according to claim 1, wherein at least one of the end of the second wiring and the third terminal facing the end has a pointed end facing the other side, and The distance between the end of the second wiring and the third terminal facing the end is smaller than the distance between the first mounting terminal and the second mounting terminal facing the mounting terminal. Thereby, a space between the end of the second wiring and the third terminal facing the end is between the first mounting terminal and the second mounting terminal facing the mounting terminal. A liquid crystal display device characterized by being configured to be more easily discharged. 5. The method according to claim 1, wherein
A liquid crystal display device, wherein the width of the end of the second wiring is wider than the width of the first mounting terminal. 6. The method according to claim 1, wherein
The width of the third terminal is wider than the width of the second mounting terminal. 7. The method according to claim 1, wherein
A liquid crystal display device, wherein the third terminal is also used as a terminal for mounting a semiconductor integrated circuit.