JPH11237646A - Liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large-screen liquid crystal display without deteriorating its quality and reliability. SOLUTION: Scanning lines 111 are formed by two parts, i.e., a 1st wire group 111-1 formed from a 1st peripheral area 104Y-1 into a display area 102 and a 2nd wire group 111-2 formed from a 2nd peripheral area 104Y-2 into the display are 102. Consequently, the scanning lines 111 divided into two in the display area 102 are shorter in a wiring length than when one scanning line is formed continuously from the 1st peripheral area 104Y-1 to the 2nd peripheral area 104Y-2 through the display area 102, so that the wiring resistance can be reduced.

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 having a wiring structure advantageous for increasing the screen size.

[0002]

2. Description of the Related Art A liquid crystal display device includes an array substrate, an opposing substrate disposed opposite to the array substrate, and a liquid crystal material sandwiched between the array substrate and the opposing substrate. And a peripheral area provided around the display area and on which driving elements and the like are arranged.

The array substrate has a plurality of scanning lines arranged parallel to each other in the row direction, a plurality of signal lines arranged parallel to each other in the column direction, and each intersection of the scanning lines and the signal lines. It has a switching element such as a thin film transistor, that is, a TFT, arranged near the section, and pixel electrodes arranged in a matrix in the display area. The counter substrate has a counter electrode provided in the display area.

A first end of the peripheral area of the array substrate is electrically connected to a signal line led out to the peripheral area, and a drive circuit for applying a predetermined drive voltage to the signal line, that is, an X driver. Is provided.

[0005] A second edge of the peripheral area of the first substrate, which is orthogonal to the first edge, is electrically connected to a scanning line drawn to the peripheral area and a predetermined driving voltage is applied to the scanning line. , Or a Y driver.

[0006]

In recent years, liquid crystal displays have been expected as devices capable of realizing large flat displays. In the liquid crystal display device having the above-described structure, in order to realize a large screen, it is necessary to increase the substrate size. At this time, the scanning lines and the signal lines are formed continuously from the peripheral area to the display area in the row direction and the column direction of the array substrate, respectively.

For this reason, in the scanning lines and signal lines,
Since the wiring resistance is increased due to the substantially longer wiring length and the time constant is increased, the voltage of the predetermined signal waveform applied to the signal line and the scanning line, respectively, is higher at the wiring end than at the signal feeding end. The phenomenon of changing the so-called accent occurs. That is, a voltage having a predetermined signal waveform is applied to the signal line and the scanning line from a power supply end connected to the X driver and the Y driver, respectively, and is supplied to the wiring end through each wiring. At this time, there is a problem that the voltage supplied to the wiring end has a waveform different from the voltage of the signal waveform applied to the power supply end.

[0008] Therefore, there is a difference in the image quality of the images formed at one end and the other end of the display area, and there is a possibility that the quality of the displayed image is significantly reduced. In order to reduce the time constant of the scanning line and the signal line, there have been proposed methods of increasing the width of the wiring, forming the wiring with a low-resistance substance, and increasing the thickness of the wiring.

[0009] However, when the wiring width is increased, there arises a problem that the aperture ratio of each pixel region formed in the display area decreases. In addition, due to a process problem in the process of forming the array substrate, it is difficult to form a wiring with a low-resistance substance. Further, when the thickness of the wiring is increased, a step is generated by the thickness of the wiring to include the wiring,
In a layer above the wiring, a problem such as disconnection of the wiring due to a large step or poor coverage of the insulating film occurs.

Therefore, the present invention has been made to solve the above problems, and a liquid crystal display device capable of displaying a large screen without deteriorating display quality and preventing a decrease in reliability. The purpose is to provide.

[0011]

According to the present invention, there is provided a liquid crystal display having a liquid crystal material sandwiched between a first substrate and a second substrate which are opposed to each other. In the display device, the liquid crystal display device has a display area for displaying an image, and first and second peripheral areas provided on both sides of the display area, and
On the substrate, a first wiring group extending from the first peripheral area into the display area and including a plurality of wirings arranged in parallel with each other; A first electrode line having a second wiring group including a plurality of wirings extending into a display area and arranged so as to be on the same straight line as each of the first wiring groups; A second array arranged orthogonal to the electrode lines
And a liquid crystal, wherein an end of each of the first wiring group and the second wiring group in the display area is arranged in parallel at a position off an arbitrary straight line. A display device is provided.

According to a fourth aspect of the present invention, in the liquid crystal display device in which a liquid crystal material is sandwiched between a first substrate and a second substrate which are arranged to face each other, the liquid crystal display device has a display area for displaying an image, First and second peripheral areas provided on both sides of the area, the first electrode lines being arranged on the surface of the first substrate, and covering the first electrode lines and the first substrate surface And an insulating film having a flattened surface, and a second electrode line arranged on the flattened surface of the insulating film so as to be orthogonal to the first electrode line. A liquid crystal display device is provided.

According to the liquid crystal display device of the first aspect,
The first electrode line is composed of a first wiring group extending from the first peripheral area to the display area and a second wiring group extending from the second peripheral area to the display area. Even when the wiring length of the electrode lines is reduced and a large-screen liquid crystal display device is configured, the wiring resistance of the first electrode lines can be reduced. For this reason, it is possible to reduce the time constant of the first electrode line, and when the voltage of the predetermined signal waveform supplied from the peripheral area side is supplied to the display area, the wiring end located in the display area At
It is possible to supply a voltage having substantially the same waveform as when supplying.

Therefore, it is possible to display an image of uniform image quality in the display area, and it is possible to provide a liquid crystal display device which suppresses a remarkable decrease in the quality of the displayed image.

According to the liquid crystal display device of the fourth aspect, the first electrode lines arranged on the surface of the first substrate are covered with the insulating film. This insulating film covers the first substrate surface and the first electrode lines, and has a planarized surface. Then, the second electrode lines are arranged on the flattened surface of the insulating film. With such a structure, even if the film thickness of the first electrode line is increased, the surface can be flattened by the insulating film covering the first electrode line. The wiring can be formed without forming the wiring.

As described above, by increasing the film thickness of the first electrode line, it becomes possible to suppress the wiring resistance and to reduce the time constant. Further, even if the film thickness of the first electrode line is increased, the insulating film can reduce the step corresponding to the film thickness of the first electrode line in the further layer, and the step in the further layer due to the large step can be reduced. Insufficient wiring, poor coverage of the insulating film, and the like can be improved. Therefore, a highly reliable liquid crystal display device can be provided.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the liquid crystal display device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view schematically showing an example of a liquid crystal display panel applied to the liquid crystal display device of the present invention.

A liquid crystal display device according to an embodiment of the present invention is an active matrix type liquid crystal display device having a display area of, for example, 14 inches diagonally.
A liquid crystal display panel 10 as shown in FIG. 1 is provided.

As shown in FIG. 1, the liquid crystal display panel 10 includes an array substrate 100 as a first substrate including a display area 102 for displaying an image and a peripheral area 104 on which a wiring pattern is formed. And a liquid crystal material disposed between the array substrate 100 and the counter substrate 200. The display area 102 includes the array substrate 10
0 and the counter substrate 200 are formed in a region surrounded by a seal
Are formed in a region outside the sealing material 106.

The display area 102 of the array substrate 100 is
As shown in FIGS. 2 and 3, 1024 × 3 signal lines 103 and 76 arranged orthogonally to each other on an insulating substrate, for example, a glass substrate 101 having a thickness of 0.7 mm.
Eight scanning lines 111 are provided. The scanning line 111 is formed of a low-resistance material such as aluminum or a molybdenum-tungsten alloy, and the glass substrate 1
01 directly. On the other hand, the signal line 103
It is formed of a low-resistance material such as aluminum and is provided on an insulating film 113 formed on the glass substrate 101 and formed of a multilayer film of silicon oxide and silicon nitride.

The array substrate 100 is provided with each signal line 10
3 and a thin film transistor as a switching element T T disposed near each intersection of each scanning line 111.
An FT 121 and a pixel electrode 151 connected via the TFT 121 are provided. The pixel electrode 151 is formed of a transparent conductive member, for example, indium-tin-oxide, that is, ITO.

As shown in FIG. 3, a portion of the TFT 121 protruding from the scanning line 111 is used as a gate electrode 112, on which a gate insulating film 113 is laminated. And
A semiconductor film 115 formed of an a-Si: H film is stacked on the gate insulating film 113. Further, on this semiconductor film 115, a channel protective film 117 made of silicon nitride is laminated.

The semiconductor film 115 is electrically connected to the pixel electrode 151 via the low-resistance semiconductor film 119 formed of an n + type a-Si: H film and the source electrode 131. Further, the semiconductor film 115 is formed of the low-resistance semiconductor film 11.
9, and the drain electrode 13 extended from the signal line 103
2 and is electrically connected to the signal line 103 via the signal line 2. T
Channel protection film 117 of FT121, source electrode 13
1 and the drain electrode 132 are covered with a protective film 171 made of an insulating film such as a silicon nitride film.

The surface of the array substrate 100 is covered with an alignment film 141 for aligning the liquid crystal material 300 interposed between the array substrate 100 and the counter substrate 200. In the liquid crystal display panel 100, as shown in FIG. 1, although not shown in detail, the signal lines extend from the display area 102 of the array substrate 100 to the first edge 20 of the peripheral area 104X.
X-TA that is drawn out only to one side and supplies a signal pulse corresponding to video data to a signal line on the first side 201 side.
B401-1, 401-2, 401-3, and 401-4 are connected via an anisotropic conductive adhesive.

Further, the scanning lines are formed from the display area 102 on the array substrate 100 to the second side 203-1 of the peripheral area 104Y-1 orthogonal to the first side 201 and the third side of the peripheral area 104Y-2. The second side 203-1 and the third side 2
Y-TAB that supplies a scanning pulse to a scanning line on the 03-2 side
411-1, 411-2, 411-3, and 411-4 are connected via an anisotropic conductive adhesive.

Then, X-TABs 401-1 and 401-
Reference numerals 2, 401-3, and 401-4 denote the X-TABs 401-1, 401-2, and 401 which are bent toward the rear surface of the liquid crystal display panel 10 and disposed on the rear surface of the liquid crystal display panel 10.
-3 and 401-4 are connected to an X control circuit board 421 via an anisotropic conductive adhesive.

Further, Y-TAB411-1, 411-
2, 411-3, 411-4 are arranged on the sides of the liquid crystal display panel 10 and each Y-TAB 411-1, 411-
2, 411-3 and 411-4 are connected to Y control circuit boards 431 and 441 via an anisotropic conductive adhesive.

Each of the X-TABs 401-1 and 401-
2, 401-3, 401-4 and the X control circuit board 421,
Alternatively, each Y-TAB 411-1, 411-2, 41
1-3, 411-4 and Y control circuit boards 431 and 441
May be electrically connected by soldering.

As shown in FIG. 3, the display area 102 of the counter substrate 200 has a transparent insulating substrate, for example, having a thickness of 0.1 mm.
Light shielding film 202 provided on a 7 mm glass substrate 201
It has. This light-shielding film 202 is
, That is, the positions facing the TFTs 121, the signal lines 103, the pixel electrodes 151, and the scanning lines 111 of the array substrate 100, and the positions facing the respective gaps are shielded from light. The light shielding film 202 is formed of, for example, a chromium film. The opposing substrate 200 is located at a position opposing the pixel electrode 151 of the glass substrate 201, and is arranged between the light-shielding films 202 for red (R), green (G), and blue ( B) color filters 203R, 203G, and 203B composed of the three primary colors are provided. The color filters 203R, 203G, 203B are, for example,
It is formed of a resin in which pigments of each color component are dispersed.

The color filters 203R, 203G,
The surface of 203 </ b> B is covered with a counter electrode 204 formed of ITO that forms a potential difference with the pixel electrode 151. The surface of the counter electrode 204 is
It is covered with an alignment film 205 for aligning the liquid crystal material 300 interposed between the array substrate 100 and the liquid crystal material 300.

On the front and back surfaces of the liquid crystal display panel 10, that is, on the outer surfaces of the glass substrate 101 and the glass substrate 201,
A polarizing plate (not shown) whose deflecting surface is selected according to the display mode of the liquid crystal display device, the twist angle of the liquid crystal material, and the like is provided as necessary.

As shown in FIG. 1, the array substrate 100 and the opposing substrate 200 are bonded together by a sealing material 106 applied so as to divide the periphery of the display area 102. Then, the liquid crystal material 300 is injected from an injection port formed by a part of the sealing material 106, and the liquid crystal material 300 is sealed by sealing the injection port.
Is sandwiched between the array substrate 100 and the counter substrate 200.

In such a liquid crystal display device, the structure of the array substrate will be described in more detail. FIG. 4 is a plan view schematically showing a structure of an array substrate applied to the liquid crystal display device shown in FIG.

As shown in FIG. 4, on the glass substrate 101 of the array substrate 100, a row direction,
0, the scanning lines 111 as first electrode lines arranged in parallel in the direction from the second end side 203-1 to the third end side 203-2, and the column direction, that is, the array substrate 1
A signal line 103 as a second electrode line is provided so as to be parallel to each other in the direction from the first end side 201-1 to the fourth end side 201-2.

A TFT 121 is provided near each intersection between the scanning line 111 and the signal line 103. This TFT
The gate electrode 112 is formed by a part of the scanning line 111, and a predetermined scanning pulse is supplied from the scanning line 111. The drain electrode 132 of the TFT 121 is formed by a part of the signal line 103, and a signal pulse corresponding to predetermined video data is supplied from the signal line 103. T
The source electrode 131 of the FT 121 is electrically connected to the pixel electrode 151, and a voltage corresponding to a signal pulse is applied from the signal line 103 when the TFT 121 is on.

The scanning lines 111 extend from the peripheral areas 104Y-1 and 104Y-2, which are first peripheral areas provided on both sides of the display area 102, to the first wiring group extending into the display area 102, respectively. 111-1 and a second wiring group 111-2.

That is, each wiring of the first wiring group 111-1 is connected to the display area 1 from the scanning electrode pad 510-1 as a signal feeding end provided in the first peripheral area 104-1.
Along the wiring direction, the wiring end 512-1 serving as a signal terminal end disposed at an arbitrary position in 02 is extended in the row direction. One of Y-TABs 411-1 and 411-2 is connected to the scan electrode pad 510-1 via an anisotropic conductive adhesive, and a scan pulse having a predetermined signal waveform is supplied from the Y control circuit board. You.

Each wiring of the second wiring group 111-2 is
From the scanning electrode pad 510-2 as a signal feeding end provided in the second peripheral area 104-2, the display area 102
And extends in the row direction to a wiring end 512-2 serving as a signal terminal end disposed at an arbitrary position in FIG. One of Y-TABs 411-3 and 411-4 is connected to the scan electrode pad 510-2 via an anisotropic conductive adhesive, and a scan pulse having a predetermined signal waveform is supplied from the Y control circuit board. You.

Each wiring end 512 of the first wiring group 111-1
1 and the respective wiring ends 512-2 of the second wiring group 111-2 are arranged so as to face each other at a predetermined interval. In addition, each of these wiring ends 512-1, 512-2
Are arranged in parallel at positions deviating from the same straight line with respect to the wiring ends of the wirings adjacent to each other. That is, the wiring ends 512-1 and 51-1 of the first wiring group 111-1 and the second wiring group 111-2 constituting the scanning line 111 are respectively provided.
The dividing boundary position of the scanning line formed by 2-2 is arranged at an arbitrary position for each scanning line in the display area 102 so as to be non-uniform.

As described above, the scanning lines 111 are formed in the first wiring group 111-1 formed from the first peripheral area 104Y-1 to the display area 102 and in the display area 102 from the second peripheral area 104Y-2. And a second wiring group 111-2 formed over the second wiring group 111-2. As described above, the scanning line 111 divided into two in the display area 102 continuously passes through the display area 102 from the first peripheral area 104Y-1 to the second peripheral area 104-2 to form one scanning line continuously. Compared to the case of forming with
The wiring length can be shortened, and the wiring resistance can be reduced. For this reason, accentuation of the signal waveform can be suppressed.

That is, the feeding ends 510-1 and 510-
2 can be supplied to the wiring ends 512-1 and 512-2 without deteriorating the waveform of the scanning pulse. This makes it possible to supply a scanning pulse having substantially the same signal waveform at any position of the scanning line 111 in the display area 102, and supply a uniform voltage to each gate electrode 112 of each TFT 121. be able to. Therefore, the display area 102
The problem that the display image quality differs depending on the position is solved, and an array substrate corresponding to a large-screen liquid crystal display device can be provided without deteriorating the display quality.

Further, since the division boundary positions of the scanning lines 111 are unequally dispersed in the display area 102, the division boundary positions are hard to be visually recognized in the display image, and the deterioration of the display quality is suppressed. It is possible to do.

In this embodiment, when the liquid crystal display device is enlarged, a scanning line arranged in parallel to the long side of the array substrate is displayed as an electrode line having a longer wiring length. Although the wiring resistance is reduced by dividing the signal line into two areas, the same effect as in the above-described embodiment can be obtained by dividing the signal line within the display area, and the wiring resistance of the signal line can be reduced. It is.

In the above-described liquid crystal display device, an example has been described in which the wiring length is shortened in order to suppress an increase in the time constant due to an increase in the wiring resistance. Can also be reduced. In this case, it is necessary to improve coverage failure of an insulating film provided above a wiring having a large thickness and wiring failure due to disconnection of another wiring provided above the wiring. In other words, a wiring having a large film thickness has a large step corresponding to the film thickness depending on the height from the lowest surface to the highest surface in the thickness direction.

For example, in the case of the scanning lines 111 arranged on the glass substrate 101, when the film thickness of the scanning lines 111 increases, the height from the surface of the glass substrate 101 to the uppermost surface of the scanning lines 111 becomes a step. If the level difference becomes large, the insulating film 113 provided on the scanning line 111 cannot sufficiently cover the scanning line 111, and there is a possibility that insulation failure, so-called coverage failure, may occur. Further, the signal line 103 arranged so as to intersect the scanning line 111 via the insulating film 113 is disconnected due to a large step when the scanning line 111 is straddled, and there is a possibility that a wiring failure may occur.

In consideration of such a problem, in general, the scanning line 111 is formed by widening the wiring width instead of increasing the film thickness in order to reduce the wiring resistance. FIG.
FIG. 3 is a perspective view schematically showing a structure of an array substrate in a region P shown by a broken line in the plan view shown in FIG. 2. In the example shown in FIG. 5, the scanning line 111 has a thickness H1 of about 2000 Å and a wiring width W1 of about 10 μm.
In this manner, by reducing the film thickness of the lower wiring, that is, the scanning line 111, the scanning line 1 is interposed via the insulating film 113.
Wiring in the upper layer, that is, the signal line 103, which straddles the wiring 11 is prevented, and the wiring resistance of the scanning line 111 is reduced by increasing the wiring width. However, when the wiring width is widened in this way, in the case of a transmissive liquid crystal display device, there arises a problem that the aperture ratio of an opening forming a pixel region is reduced.

For this reason, in order to reduce the wiring resistance without lowering the aperture ratio and to prevent poor coverage of the upper insulating film and poor wiring of the upper wiring, the array shown in FIG. A substrate may be formed.

FIG. 6 is a perspective view schematically showing a structure of an array substrate in a region P shown by a broken line in the plan view shown in FIG. That is, as shown in FIG. 6, the lower layer wiring, that is, the scanning line 111 is formed so that the film thickness H2 is increased instead of decreasing the wiring width W2 in order to reduce the wiring resistance without lowering the aperture ratio. Have been. In the example shown in FIG. 6, the scanning line 111 has a thickness H2 of about 4000 Å and a wiring width W2 of about 5 μm.

As described above, when the thickness of the lower layer (scanning line) wiring is increased, poor coverage of the upper insulating film and defective wiring of the upper layer wiring (signal line) cause problems. These problems can be solved by planarizing the surface of the insulating film to be covered.

That is, the glass substrate 101 and the scanning line 1
11 is formed to a thickness greater than or equal to the thickness of the scanning line 111, and the insulating film 113 on which the signal line 103 is formed is formed.
The surface is flattened. Thus, the glass substrate 101
Scanning line 1 formed by the surface of
The step corresponding to the thickness of 11 is filled with the insulating film 113,
It is possible to prevent poor coverage of the insulating film 113 covering the scanning line 111 and wiring failure such as disconnection of the signal line 103 formed over the insulating film 113.

Such a structure is, for example, used for the glass substrate 1
After forming the scanning lines 111 on the surface of the glass substrate 103 using, for example, a molybdenum-tungsten alloy as a low-resistance metal, a silicon nitride film, for example, is used as an interlayer insulating film in a portion where the glass substrate 103 is exposed other than the scanning lines 111
1 and a further insulating film is formed so as to cover the interlayer insulating film and the scanning line 111.

As described above, the lower layer wiring, that is, the insulating film covering the scanning line is formed thicker than the thickness of the scanning line, and at least immediately above the scanning line, a step smaller than the thickness of the scanning line can be formed. Is formed. At this time, the level difference of the insulating film formed immediately above the scanning line is such that the wiring in the upper layer formed so as to straddle the level difference of the insulating film, that is, the signal line is not disconnected. Further, since the insulating film is preferably formed so that the portion immediately above the scanning line is flat, a wiring defect such as a disconnection of a signal line can be reliably prevented.

As described above, when the upper layer wiring is formed so as to cross over the lower layer wiring with the insulating film interposed therebetween, the insulating film covering the lower layer wiring is replaced with a film having a thickness equal to or larger than the thickness of the lower layer wiring. By forming the insulating layer to have a thickness and substantially flattening the surface located immediately above the lower wiring, it is possible to prevent poor coverage of the insulating film and to prevent wiring failure of the upper wiring. Such a structure is irrelevant to the thickness of the underlying wiring, so that it is possible to reduce the wiring resistance of the underlying wiring and to increase the thickness of the wiring in order to prevent a reduction in aperture ratio. .

Therefore, it is possible to provide a liquid crystal display device capable of displaying a large screen without deteriorating the display quality and preventing a reduction in reliability.

It should be noted that the present invention can be applied to other than an active matrix drive type liquid crystal display device using a TFT as a switching element as in the above-described embodiment, and the scanning as a first electrode line can be performed. An electrode line was provided on the array substrate side, a signal electrode line as a second electrode line was provided on the counter substrate side, and the array substrate and the counter substrate were bonded so that the scanning electrode line and the signal electrode line were orthogonal to each other. The present invention can be applied to a simple matrix driving type liquid crystal display device.

[0056]

As described above, according to the present invention, it is possible to provide a large-screen display without deteriorating the display quality and to provide a liquid crystal display device capable of preventing a reduction in reliability. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an example of the structure of a liquid crystal display device according to the present invention.

FIG. 2 is a plan view schematically showing a structure of a pixel region of the liquid crystal display device shown in FIG.

FIG. 3 is an AA ′ of the liquid crystal display device shown in FIG. 2;
It is sectional drawing which shows roughly the cross section fractured | ruptured by the line.

FIG. 4 is a plan view schematically showing a structure of an array substrate applied to the liquid crystal display device of the present invention.

FIG. 5 is a perspective view schematically showing a general structure of an intersection between a scanning line and a signal line.

FIG. 6 is a perspective view schematically showing a structure of an intersection between a scanning line and a signal line in a region P of the plan view shown in FIG. 2;

[Explanation of symbols]

 Reference Signs List 10 liquid crystal display panel 100 array substrate 101 glass substrate 102 display area 103 signal line 104 peripheral area 111 scanning line 111-1 first wiring group 111-2 second wiring group 113 insulating film 121 ... Thin film transistor 151 ... Pixel electrodes 510-1, 510-2 ... Scan electrode pads 512-1, 512-2 ... Wiring ends

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H01L 29/786 H01L 29/78 612C 21/336 627A

Claims (5)

[Claims] 1. A liquid crystal display device in which a liquid crystal material is sandwiched between a first substrate and a second substrate which are arranged to face each other, wherein the liquid crystal display device has a display area for displaying an image and both sides of the display area. 1st and 2nd provided in
A first area including a plurality of wirings extending from the first peripheral area into the display area and arranged in parallel with each other. A wiring group, a second wiring group including a plurality of wirings extending from the second peripheral area into the display area and arranged so as to be on the same straight line as each of the first wiring groups; And a second electrode line arranged to be orthogonal to the first electrode line. The first electrode line and the second electrode line are arranged in the display area. The liquid crystal display device, wherein the end portions are arranged in parallel at positions deviating from an arbitrary straight line. 2. The display device according to claim 1, wherein the first substrate is disposed at an intersection of the pixel electrodes arranged in a matrix in the display area and the first electrode line and the second electrode line. The liquid crystal display device according to claim 1, further comprising: a switching element configured to switch the pixel electrode based on a voltage applied to the second electrode line. 3. The liquid crystal display device according to claim 1, wherein the first electrode lines are scanning lines arranged in parallel to a long side of the first substrate. 4. A liquid crystal display device in which a liquid crystal material is sandwiched between a first substrate and a second substrate which are arranged to face each other, wherein the liquid crystal display device has a display area for displaying an image and both sides of the display area. 1st and 2nd provided in
A first electrode line arranged on the surface of the first substrate, an insulating film covering the first electrode line and the surface of the first substrate and having a planarized surface; And a second electrode line arranged on the flattened surface of the film so as to be orthogonal to the first electrode line. 5. A first wiring group including a plurality of wirings extending from the first peripheral area into the display area and including a plurality of wirings arranged in parallel with each other. A second wiring group including a plurality of wirings extending from the second peripheral area into the display area and arranged in parallel with the first wiring group. 5. The liquid crystal display device according to claim 4, wherein end portions of each of the first and second wiring groups are arranged in parallel at positions off an arbitrary straight line.