JP2000028993A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the decrease in constrast and the vertical crosstalk by providing metallic layers serving combinedly as light shielding layers at upsides or downsides of common wirings in the inside of a pixel and connecting both sides of the layers to the common wirings with through-holes. SOLUTION: An active element 121 making both wirings of a scan wiring 101 and a signal wiring 102 its terminals is provided at the intersection of the wirings 101, 102. Then, this device is constituted so that one more terminal of the element 121 is connected to a pixel electrode 105 and a voltage is applied to the liquid crystal between a counter electrode 106 and a common electrode 103 or 104. Moreover, light shielding layers 107 serving combinedly as light shielding layers are provided under common wirings 103 and 104 being in the pixel using the layer of a scan wiring 101. Since this light shielding layers 107 are composed of the same metal as that of the scan wiring 101, the specific resistance of the layers are small and the layers become the bypassing routes of currents flowing through the common wirings 103 and 104 by allowing the layers to be connected to the common wirings 103 and 104 via through-holes at two points being in the pixel. Thus, the resistance of the common wiring 103 and 104 become smaller and wiring delays are made smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a TFT liquid crystal display device, and more particularly to a structure of a liquid crystal display device capable of high image quality and low power consumption.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No. Hei 8-211411 discloses a driving circuit and a structure thereof for achieving both high image quality and low power consumption in a liquid crystal display device of a type in which an electric field parallel to a substrate surface is applied to liquid crystal. Is described in detail. In this known example, the common wiring is divided into an odd-numbered column and an even-numbered column, and by applying AC voltages having different phases to both columns, both the reduction in signal voltage and the improvement in image quality are achieved.

FIG. 3 shows a pixel plane structure when the above-described drive circuit configuration is applied to a liquid crystal panel using a current standard process. At the intersection of the scanning wiring 101 and the signal wiring 102, there is an active element 121 having both wirings as terminals, and another terminal of the active element 121 is a pixel electrode 1
05 and the common electrode 10 and the common wiring 10.
It is configured to apply a voltage to the liquid crystal between 3 and 104. Here, the common wiring is arranged in the signal wiring direction, and is divided into a common wiring 1 (103) connected to pixels in odd-numbered columns and a common wiring 2 (104) connected to pixels in even-numbered columns. Can be The two common lines are also electrically insulated, and by applying AC voltages of opposite phases to both, the voltage applied to the signal lines is halved, and the write voltage to the liquid crystal of the adjacent pixel is reduced. Since the polarity can be inverted, it is possible to achieve both low power consumption and high image quality.

FIG. 4 is a cross-sectional view taken along the line AA 'of FIG. 3, showing a liquid crystal layer 119 sandwiched between a lower substrate 201 having various wirings and an upper substrate 202 which is a counter substrate. Has become. The lower substrate 201 is the lower glass substrate 11
0, scanning wiring 101, insulating first layer 111, signal wiring 1
02, the insulating second layer 112, and the common wires 103 and 10
4, the pixel electrode 105 and the like are laminated.
The angle of the liquid crystal molecules 120 is changed by an electric field between the pixel electrode 105 and the common wiring 103 to control the degree of polarization of light passing through the polarizing plate 117. On the upper substrate 202, a color filter 114 for color display, a light-shielding film 115 for blocking light leakage from a gap, and a flattening layer 113 are formed on an upper glass substrate 116, and further, light whose polarization is controlled by liquid crystal is adjusted. A polarizing plate 118 that emits light is adhered.

Here, since the common wirings 103 and 104 are arranged in the same direction as the signal wirings 102, the scanning wirings 101 and 104 are provided.
And the uppermost layer different from the signal wiring 102. This is because when the scanning wiring 101 is formed in the same layer, a through hole is necessary to straddle the scanning wiring 101,
This is because productivity is expected to be poor in terms of process, and when the same layer as the signal wiring 102 is used, the possibility of a short circuit is large because both wirings are close to each other. Is not expected to be good.

[0006]

In the current liquid crystal panel process, the uppermost common wirings 103 and 104 of the lower substrate 201 are made of ITO. Further, since these wirings are in contact with the liquid crystal layer 119, a material that is durable with respect to the liquid crystal is desirable.
At this point too, ITO is currently selected.

However, since ITO has a higher specific resistance than other metals and the like, the common wires 103 and 104
Resistance becomes large and wiring delay becomes remarkable,
Display defects such as vertical crosstalk will occur.

Further, the common wiring 1 (103) and the common wiring 2
(104) are adjacent to each other with the signal wiring 102 interposed therebetween, and an alternating voltage of opposite polarity is applied between the two.
During this time, the liquid crystal 119 is in a transmissive state, and the light passing through the gap also passes through the light-blocking layer 115, so that the black display does not become black, and a display defect such as a decrease in contrast may occur.

Further, the electric field generated between the common lines 103 and 104 causes the common lines 103 and
The liquid crystal layer 119 on and near 4 is partially in a light transmitting state, and light leaks from this portion, so that display defects such as a decrease in contrast and vertical crosstalk may be further deteriorated.

[0010]

Means for Solving the Problems The present invention has been made to solve the above problems, and the first means is as follows.
A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning line and a signal line, a common line, and a matrix of pixels arranged on one side of the substrate; A liquid crystal display device comprising: an active element, a capacitive element, a pixel electrode connected to the active element, a counter electrode connected to the common wiring, and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. The pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to an odd column connected to a counter electrode of a pixel belonging to an odd column. The wiring is divided into an even-numbered column common wiring connected to a counter electrode of a pixel belonging to the even-numbered column, and a metal layer also serving as a light shielding layer is provided above or below the common wiring in the pixel. Both ends are connected to the common wiring in the through hole.

According to a second aspect of the present invention, there is provided a liquid crystal display device comprising: a pair of substrates at least one of which is transparent; a liquid crystal composition sandwiched between the substrates; a scanning line and a signal line disposed on one of the substrates; A common line and a pixel in a matrix; an active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common line; In a liquid crystal display device having driving means for applying a wiring, the pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring has an odd column. The common line is divided into an odd-numbered column common line connected to the counter electrode of the pixel belonging to the eye and an even-numbered column common line connected to the counter electrode of the pixel belonging to the even-numbered column. Al and Nb, the use of metal having a surface oxide layer, such as Ta.

[0012] A third means of the present invention comprises a pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning line and a signal line disposed on one of the substrates. A common line and a pixel in a matrix; an active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common line; In a liquid crystal display device having driving means for applying a wiring, the pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring has an odd column. The pixel is divided into an odd column common line connected to the counter electrode of the pixel belonging to the eye and an even column common line connected to the counter electrode of the pixel belonging to the even column. Te has a two-layer structure of the oxide layer such as a metal layer and ITO.

According to a fourth aspect of the present invention, at least one of the substrates includes a pair of transparent substrates, a liquid crystal composition sandwiched between the substrates, a scanning line and a signal line disposed on one of the substrates. A common line and a pixel in a matrix; an active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common line; In a liquid crystal display device having driving means for applying a wiring, the pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring has an odd column. The pixel is divided into an odd-numbered column common line connected to the counter electrode of the pixel belonging to the eye and an even-numbered column common line connected to the counter electrode of the pixel belonging to the even-numbered column. At the end and the lower end, they are connected for each odd-numbered row and for each even-numbered row. Signal transmission points from outside the liquid crystal panel to these common wirings are two points at the top and bottom of the panel, or at four points of the panel square. Be a point or 3
Be a point.

According to a fifth aspect of the present invention, there is provided a liquid crystal display device comprising: a pair of substrates at least one of which is transparent; a liquid crystal composition sandwiched between the substrates; a scanning line and a signal line disposed on one of the substrates; A common line and a pixel in a matrix; an active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common line; In a liquid crystal display device having driving means for applying a wiring, the pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring has an odd column. The odd-numbered column common line connected to the counter electrode of the pixel belonging to the eye column and the even-numbered column common line connected to the counter electrode of the pixel belonging to the even-numbered column are separated. Odd column common wiring and the even columns common wiring to one substrate is disposed in a position substantially equal in a direction perpendicular to the substrate surface.

According to a sixth aspect of the present invention, there is provided a liquid crystal display device comprising: a pair of substrates, at least one of which is transparent; a liquid crystal composition sandwiched between the substrates; a scanning line and a signal line disposed on one of the substrates; A common line and a pixel in a matrix; an active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common line; In a liquid crystal display device having driving means for applying a wiring, the pixel electrode and the counter electrode apply an electric field mainly parallel to the substrate surface to the liquid crystal composition layer, and the common wiring has an odd column. The pixel is divided into an odd-numbered column common line connected to the counter electrode of the pixel belonging to the even-numbered column, and an even-numbered column common line connected to the counter electrode of the pixel belonging to the even-numbered column. It is arranged to so that.

According to a seventh aspect of the present invention, in the fifth aspect, at least the common wiring on the substrate on which the active elements are disposed is arranged so as to overlap the signal wiring.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to examples.

[Embodiment 1] FIG. 1 shows a planar structure of a pixel of a liquid crystal display device in this embodiment.

At the intersection of the scanning wiring 101 and the signal wiring 102, there is an active element 121 having both wirings as terminals. The other terminal of the active element 121 is connected to the pixel electrode 105, and the counter electrode 106 and the common wiring 103 or 10 are connected.
4 and a common wiring is arranged in the signal wiring direction, and the odd-numbered column common wiring 1 (103) and the even-numbered column common wiring 2 ( 10
The point 4) is the same as the conventional example.

Here, the common lines 103 and 104 in the pixel
Underneath, a conductive bypass layer (light-shielding conductive layer) 107 that also serves as a light shield using the layer of the scanning wiring 101 is arranged. Since the light-shielding conductive layer 107 is made of the same metal as the scanning wiring 101, its specific resistance is small, and as shown in FIG.
By connecting through holes to the common wirings 103 and 104 at this point, a bypass path for current flowing through the common wirings 103 and 104 is provided. Therefore, the common lines 103 and 104
The display resistance such as vertical smear does not occur because the resistance of the wiring is reduced and the wiring delay is reduced.

Next, FIG. 2 is a sectional view of the lower substrate 201 taken along the line BB 'of FIG. The light-shielding conductive layer 107 has a shape directly below the common wirings 103 and 104 and is slightly larger. As a result, light passing through the liquid crystal on or near the common line can be shielded, so that the common lines 103 and 10
4 can reduce display defects such as a decrease in contrast and a vertical crosstalk caused by an electric field between them.

In this embodiment, since the light-shielding conductive layer 107 is disposed below the common wirings 103 and 104, the resistance of the common wiring can be reduced, and the wiring and the vicinity thereof can be shielded. Talk can be reduced.

[Embodiment 2] In this embodiment, the pixel structure is the same as that of the conventional example.
After the formation and patterning of l (aluminum), the surface is oxidized. All surfaces of the common wiring that come into contact with the liquid crystal due to surface oxidation are stable oxide films, and do not adversely affect the liquid crystal. Further, since Al is a metal, its specific resistance is small, and the common wirings 103 and 104
Resistance can be reduced and wiring delay can be reduced.
Display defects such as vertical smear do not occur.

Further, since Al does not allow light to pass through, it is possible to reduce display defects such as a decrease in contrast and a vertical crosstalk caused by an electric field between the common lines 103 and 104.

In this embodiment, the common wirings 103 and 1
Although Al was used as the material of No. 04, Nb, Ta,
And a metal such as an alloy of which a stable surface oxide film is formed.

In this embodiment, since Al and its surface oxide film are used as the material of the common wirings 103 and 104, the resistance of the common wiring can be reduced, and the wiring can be shielded from light. Can be reduced.

Embodiment 3 FIG. 5 shows a planar structure of a pixel of a liquid crystal display device according to this embodiment. FIG. 6 shows C in FIG.
A cross-sectional view of the lower substrate 201 taken along line -C 'is shown.

At the intersection of the scanning wiring 101 and the signal wiring 102, there is an active element 121 having both wirings as terminals. The other terminal of the active element 121 is connected to the pixel electrode 105, and the counter electrode 106 and the common wiring 103 or 10 are connected.
4 and a common wiring is arranged in the signal wiring direction, and the odd-numbered column common wiring 1 (103) and the even-numbered column common wiring 2 ( 10
The point 4) is the same as in the first embodiment.

Here, the common wirings 103 and 104 are shown in FIG.
As shown in the figure, the metal layer 109 is covered with the ITO layer 108, and the surface in contact with the liquid crystal is ITO, so that the liquid crystal is not adversely affected. Also, the common wiring 103 or 1
Since the resistance of the element 04 is low because the metal layer 109 is included and the wiring delay is reduced, display defects such as vertical smear do not occur.

Further, since the metal layer 109 in the common wirings 103 and 104 does not allow light to pass through, it can block a part of the light passing through the common wirings. It is possible to reduce display defects such as a decrease in contrast and a vertical crosstalk caused by an electric field.

Here, the material of the metal layer 109 used in the present embodiment is desirably low in specific resistance because display resistance such as vertical crosstalk is less likely to occur as the resistance of the common wirings 103 and 104 decreases.

In this embodiment, since the common wirings 103 and 104 are structured so as to cover the metal layer with the ITO layer, the resistance of the common wirings can be reduced, and a part of the wirings can be shielded from light. Talk can be reduced.

[Embodiment 4] FIG. 7 shows a circuit configuration diagram of a liquid crystal display device in this embodiment.

The scanning lines 101 and the signal lines 102 are arranged in a grid pattern and are driven by a scanning line driving circuit 131 and a signal line driving circuit 132, respectively. The points controlled by the signal bus 134 and the signal line driving signal bus 135 and the like, and the common wiring is arranged in the signal wiring direction, so that the odd-numbered column common wiring 1 (103) and the even-numbered column common wiring 2 (104 ) Is the same as the known example.

Here, the common lines 103 and 104 are shown in FIG.
As shown in the figure, the upper and lower ends of the liquid crystal panel 100 are connected in a row, respectively.
Are connected to the common line 1 drive signal bus 136 and the common line 2 drive signal bus 137 at the four corners.

In this case, since the current flowing through the common wiring flows from both the upper and lower ends, the wiring load is substantially reduced to 1/4 (half the wiring length and half the load capacity). For this reason, the display delay such as vertical smear does not occur because the wiring delay is reduced. In this embodiment, the connection points of the common lines 103 and 104 with the common line 1 drive signal bus 136 and the common line 2 drive signal bus 137 are connected at the four corners of the liquid crystal panel 100. If the resistance of the wiring part connecting the common wirings 103 and 104 is low, three-point connection at three corners excluding one corner, or only connection at the two upper and lower ends may be used. Also, if the resistance of the wiring part connecting the common wiring at the upper and lower ends is high, the connection may be made at more points.

In this embodiment, the connection to the two lines of common wiring (103, 104) in the panel is made at four, three, or two points at the four corners of the panel, so that the load of the common wiring is substantially reduced. Since the wiring delay can be reduced, the vertical crosstalk can be reduced.

[Embodiment 5] FIG. 8 shows a pixel sectional structure of a liquid crystal display device in this embodiment.

The lower substrate 201 having various wirings and the upper substrate 202 having the color filter 114 and the like have a liquid crystal layer 119.
And the structure of the lower substrate 201 is the same as that of the conventional example, except that the upper substrate 202 at a position substantially equal to the substrate surface in the vertical direction corresponding to the common wiring 103 or 104. Common wiring 3 (123) and common wiring 4
(124) is arranged.

As a result, the load (liquid crystal capacitance) borne by the common lines 103 and 104 is reduced and the wiring delay is reduced, so that display defects such as vertical smear do not occur.

In order to prevent the common lines 123 and 124 from spreading the electric field between the common lines 103 and 104 to the liquid crystal region in the pixel, light leakage of the liquid crystal near the common lines is suppressed. It is possible to reduce display defects such as a decrease in contrast and a vertical crosstalk caused by an electric field between the electrodes 104.

In this embodiment, since the common lines 123 and 124 are also arranged on the upper substrate 202, the load on the common lines can be reduced, and the application of an electric field between the common lines to the liquid crystal in the pixel can be suppressed. Therefore, it is possible to reduce contrast reduction and vertical crosstalk. [Embodiment 6] FIG. 9 shows a pixel sectional structure of a liquid crystal display device in this embodiment.

A liquid crystal layer 119 is formed on a lower substrate 201 having various wirings and an upper substrate 202 having a color filter 114 and the like.
And the common wires 103 and 10
The structure of the lower substrate 201 and the upper substrate 202 except for 4 is the same as that of the conventional example.
Are arranged so that a part thereof overlaps with the signal wiring 102. Accordingly, since the gap between the common lines 103 and 104 is shielded by the signal lines 102, light leakage of the liquid crystal layer due to a voltage applied between the common lines is eliminated, and display defects such as a decrease in contrast are reduced.

In this embodiment, since the common wirings 103 and 104 are arranged so as to overlap with the signal wiring 102, light leakage from between the two wirings can be shielded, so that display defects such as a decrease in contrast are reduced.

[Embodiment 7] FIG. 10 shows a pixel sectional structure of a liquid crystal display device in this embodiment.

The point that the liquid crystal layer 119 is sandwiched between the lower substrate 201 and the upper substrate 202 is the same as that of the fifth embodiment.
04 and the common lines 123 and 12 on the upper substrate 202.
4 is at a position substantially equal to the direction perpendicular to the substrate surface, and
A part thereof is arranged so as to overlap with the signal wiring 102.

Thus, as described in the fifth embodiment, display defects such as lowering of contrast and vertical crosstalk can be reduced.
Since the gap with the signal wiring 104 is shielded by the signal wiring 102, light leakage of the liquid crystal layer due to a voltage applied between the common wirings is eliminated, and display defects such as a decrease in contrast are reduced.

[0048]

As described above, according to the present invention, since the light-shielding conductive layer is disposed below the common wiring, the resistance of the common wiring can be reduced, and the light can be shielded on and in the vicinity of the wiring, so that the contrast is reduced and the vertical direction is reduced. Directional crosstalk can be reduced.

Alternatively, since Al and its surface oxide film are used as the material of the common wiring, the resistance of the common wiring can be reduced, and the wiring can be shielded from light, thereby lowering the contrast and reducing vertical crosstalk.

Alternatively, since the common wiring has a structure in which the metal layer is covered with the ITO layer, the resistance of the common wiring can be reduced, and a part of the wiring can be shielded from light, so that the contrast and the vertical crosstalk can be reduced.

Alternatively, the connection to the two lines of common wiring in the panel is made at four, three, or two points at the four corners of the panel, so that the load on the common wiring can be substantially reduced, and the wiring delay is reduced. Since it is reduced, vertical crosstalk can be reduced.

Alternatively, since the common wiring is also arranged on the upper substrate, the load on the common wiring can be reduced, and the application of an electric field between the common wiring to the liquid crystal in the pixel can be suppressed. Talk can be reduced.

Alternatively, since the common wiring is arranged so as to overlap the signal wiring, light leakage from between the two wirings can be shielded, so that display defects such as a decrease in contrast are reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a planar structure of a pixel unit according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a cross-sectional structure of a pixel portion taken along line BB ′ of FIG. 1;

FIG. 3 is a diagram showing a planar structure of a pixel portion of a conventional example.

FIG. 4 is a diagram showing a cross-sectional structure of a pixel portion taken along line AA ′ of FIG. 3;

FIG. 5 is a diagram illustrating a planar structure of a pixel unit according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a cross-sectional structure of a pixel portion taken along line CC ′ of FIG. 5;

FIG. 7 is a diagram showing a structure of a liquid crystal panel according to a fourth embodiment of the present invention.

FIG. 8 is a diagram illustrating a cross-sectional structure of a pixel portion according to a fifth embodiment of the present invention.

FIG. 9 is a diagram illustrating a cross-sectional structure of a pixel portion according to a sixth embodiment of the present invention.

FIG. 10 is a diagram illustrating a cross-sectional structure of a pixel portion according to a seventh embodiment of the present invention.

[Explanation of symbols]

100: TFT liquid crystal panel, 101: scanning wiring, 102
... signal wiring, 103 ... common wiring 1, 104 ... common wiring 2, 105 ... pixel electrode, 106 ... counter electrode, 107 ... light shielding conductive layer, 108 ... ITO layer, 109 ... metal layer, 110 ...
Lower glass substrate, 111: first insulating layer, 112: second insulating layer, 113: flattening layer, 114: color filter, 1
15: light shielding film, 116: upper glass substrate, 117: lower polarizing plate, 118: upper polarizing plate, 119: liquid crystal layer, 120
... liquid crystal molecules, 121 ... active elements, 123 ... common lines 3, 124 ... common lines 4, 131 ... scanning line drive circuits,
132: signal line driving circuit, 133: liquid crystal controller,
Reference numeral 134 denotes a scanning line driving signal bus, 135 denotes a signal line driving signal bus, 136 denotes a common wiring 1 driving signal bus, 137 denotes a common wiring 2 driving signal bus, 201 denotes a lower substrate, and 202 denotes an upper substrate.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H01L 29/786 H01L 29/78 612C (72) Inventor: Keika Aratani 7-1, Omikacho, Hitachi City, Ibaraki Prefecture No. 1 F term in Hitachi Research Laboratory, Hitachi Ltd. (Reference) 2H092 GA14 GA17 GA25 HA06 JA24 JA46 JB51 JB56 NA01 NA26 NA28 PA08 2H093 NA16 NA43 NC34 NC35 ND04 ND15 ND39 NE06 5C094 AA06 AA09 BA03 BA43 DA13 EA07 FB12

Claims (8)

[Claims] 1. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates; An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Divided into an odd-numbered column common line and an even-numbered column common line connected to a counter electrode of a pixel belonging to an even-numbered column. The provided at least at both ends thereof is a liquid crystal display device, characterized in that connected to the common wiring in the through hole. 2. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates; An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Are divided into odd-numbered column common lines and even-numbered column common lines connected to the counter electrodes of the pixels belonging to the even-numbered columns.
A liquid crystal display device using a metal having a surface oxide layer such as b or Ta. 3. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates. An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. The common lines are divided into the odd-numbered column common lines and the even-numbered column common lines connected to the counter electrodes of the pixels belonging to the even-numbered columns, and these common lines are partially or entirely formed of metal layers and oxides such as ITO. The liquid crystal display device, characterized in that a two-layer structure. 4. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates. An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Divided into odd-numbered column common lines and even-numbered column common lines connected to the counter electrodes of pixels belonging to the even-numbered columns. They are connected to each fine even column, a liquid crystal display device, wherein the signal transfer point from the liquid crystal panel outside to these common lines is more than 2 points of the panel vertically. 5. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates; An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Divided into odd-numbered column common lines and even-numbered column common lines connected to the counter electrodes of the pixels belonging to the even-numbered columns. Corresponding to these common lines, the odd-numbered column common lines A liquid crystal display device characterized by even columns common wiring is arranged in a position substantially equal in a direction perpendicular to the substrate surface. 6. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates. An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Divided into the odd-numbered column common wiring and the even-numbered column common wiring connected to the counter electrode of the pixel belonging to the even-numbered column, and these common wirings are arranged so as to overlap the signal wiring. The liquid crystal display device according to claim. 7. The liquid crystal display device according to claim 5, wherein the common wiring on at least the substrate on which the active elements are disposed is arranged so as to overlap the signal wiring. 8. A pair of substrates, at least one of which is transparent, a liquid crystal composition sandwiched between the substrates, a scanning wiring and a signal wiring, a common wiring, and a matrix of pixels arranged on one of the substrates; An active element and a capacitor disposed in the pixel; a pixel electrode connected to the active element; a counter electrode connected to the common wiring; and driving means for applying a predetermined voltage waveform to the scanning wiring and the signal wiring. In the liquid crystal display device, the pixel electrode and the counter electrode mainly apply an electric field parallel to the substrate surface to the liquid crystal composition layer, and the common wiring is connected to a counter electrode of a pixel belonging to an odd column. Divided into odd-numbered column common lines and even-numbered column common lines connected to the counter electrodes of the pixels belonging to the even-numbered columns. Kutomo and both ends of the liquid crystal display device, characterized in that connected to the common wiring in the through hole.