JP2001033814A - Liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal panel capable of minimizing the distortion of signal waveform and sufficiently writing signals into the pixels even if the liquid crystal panel is made large in screen size and high in definition. SOLUTION: In this liquid crystal panel, at least video signal wirings 2 and scanning signal wirings arranged in a matrix shape, switching elements arranged corresponding to each intersection of the video signal wirings 2 and the scanning signal wirings 1, pixel electrodes connected to the switching elements, common electrodes (4a), 4b formed to be opposed to the pixel electrodes (3a), and a common wiring 4e connecting the common electrodes are formed on the counter face side of one of two opposing transparent substrates holding a liquid crystal layer. In the liquid crystal panel, the wiring width of a common wiring 4c is formed narrower at the intersections with the video signal wirings 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel using a horizontal electric field method and having a bent electrode for driving a liquid crystal.

[0002]

2. Description of the Related Art A liquid crystal panel has advantages such as thinness, light weight, low voltage drive, and so on.
Sonal computer, personal word processor
It is used for such purposes.

In recent years, in particular, for personal computers, there has been an increasing demand for a liquid crystal panel having a wider viewing angle in response to a larger screen, and in response to this, the viewing angle of the liquid crystal panel has been increased. As a spreading method, a horizontal electric field method in which a pixel electrode and a counter electrode are formed on the same substrate and a liquid crystal molecule is operated by applying a horizontal electric field has been proposed. This method is also called an IPS (In-Plane-Swiching) method or a comb-shaped electrode method (Liquid crystal display technology: see Industrial Book p42). In this display method, the major axis of liquid crystal molecules is always almost parallel to the substrate. Therefore, a wide viewing angle can be obtained with a small change in brightness when the viewing angle direction is changed.

Further, as a method of improving the viewing angle characteristic in a specific direction in the IPS system, a method of obtaining a liquid crystal driving direction in two directions by inclining or bending a pixel electrode and a counter electrode for generating an electric field for driving a liquid crystal, for example, It is proposed in JP-A-9-105908 and JP-A-9-258269. As a method for obtaining a bright liquid crystal panel by increasing the aperture ratio of pixels in a horizontal electric field type liquid crystal panel, a method of reducing the area of a shielded portion by overlapping a signal wiring and an electrode in a pixel is disclosed in, for example, Japanese Patent Application Laid-Open No. 9-1997.
No. 61842 and JP-A-9-236820. Hereinafter, a conventional liquid crystal panel will be described with reference to the drawings.

FIGS. 12 to 15 show a conventional liquid crystal panel using a horizontal electric field method. FIG. 12 is a plan view showing an electrode configuration of one pixel in a conventional liquid crystal panel, and FIG. 13 is a sectional view of the conventional liquid crystal panel taken along line BB 'in FIG. Also,
FIG. 14 is a plan view showing an electrode configuration of one pixel in a conventional liquid crystal panel in which a signal wiring and an electrode in a pixel are overlapped and arranged;
FIG. 15 is a sectional view of the conventional liquid crystal panel taken along the line AA ′ in FIG.

In FIGS. 12 and 13, reference numeral 11 denotes a scanning signal wiring (gate) formed on an array substrate 20a based on a transparent substrate, and 12 denotes a video signal wiring (source). And a thin film transistor (TFT: Thin Film) including a semiconductor layer 15 as an active element (switching element) at an intersection thereof.
Transistor) is formed. 13 is a pixel electrode,
It is connected to a video signal wiring (source) 12 via a semiconductor layer 15. 14a connected by common wiring 14c
Is a common electrode, which is formed at regular intervals so as to face the pixel electrode 13, and has a structure in which a horizontal electric field is generated between the pixel electrode 13 and the liquid crystal is driven. The pixel electrode 1
Since no horizontal electric field is generated on the electrodes 3 and the common electrode 14, the liquid crystal cannot be controlled. Therefore, generally, the pixel electrode 13 and the common electrode 14 are formed of a metal having a light shielding property, and the display is affected. I try not to give.

The video signal wiring (source) 12 and the pixel electrode 13, the scanning signal wiring (gate) 11 and the common electrode 14
Is formed via an insulating layer 16 such as SiO2,
The storage capacitor 19 is formed between the common line 14c and the opposing pixel electrode 13. The storage capacitor 19 holds the voltage supplied to the pixel.

The liquid crystal layer 17 is sandwiched between the array substrate 20a
A color filter substrate 20b formed on the basis of a transparent substrate is disposed so as to face the substrate, and a black mask 18 is provided on the color filter substrate 20b side of the array substrate 20a.
BM and color filters 18R, G, B are formed.

In the liquid crystal panel configured as described above, when a gate pulse, which is a pulse signal having a fixed period, is externally applied to the scanning signal wiring (gate) 11, the scanning signal wiring (gate) 11 is applied to the scanning signal wiring (gate) 11. The TFT including the connected semiconductor layer 15 is turned on, and the switch is opened. As a result, the video signal voltage applied to the video signal wiring (source) 12 is applied to the pixel electrode 13 through the TFT including the semiconductor layer 15. The common electrode 14a has a common wiring 14c
, A constant voltage is separately applied, and an electric field is applied to the liquid crystal between the electrodes by the voltage difference between the common electrode 14a and the pixel electrode 13 to control the liquid crystal. The amount of light transmitted through the liquid crystal can be controlled by controlling the liquid crystal, and accordingly, a display corresponding to the input signal can be performed. The signal voltage applied to the pixel is controlled by the liquid crystal in the pixel and the storage capacitor 19.
Thus, the signal is held until the next gate pulse is applied from the scanning signal wiring (gate) 11.

[0010] On the other hand, a conventional liquid crystal panel in which the aperture ratio of the pixel is increased by arranging the signal wiring and the electrode in the pixel so as to overlap with each other will be described with reference to the drawings.

In FIGS. 14 and 15, the difference from the above-mentioned conventional liquid crystal panel is that the video signal wiring (source) is different.
12 and the common electrode 14a are arranged so as to overlap in the substrate surface with the insulating layer 6 interposed therebetween. With this configuration, the area shielded by the electrodes can be reduced, and the aperture ratio can be increased accordingly.

[0012]

However, the above-mentioned conventional liquid crystal panel has a problem in that the video signal applied to the video signal wiring 12 responds to the wiring resistance of the video signal wiring itself, the video signal wiring and the common wiring 14c and the scanning signal. Wiring (gate) 11
The signal waveform applied to the pixel is distorted due to the parasitic capacitance formed at the intersection with. The signal waveform distortion is
Since the resistance increases from input to the pixel and increases in proportion to the capacitance, the signal voltage will be sufficient if the wiring length is increased due to a larger screen or if the number of intersections that form the capacitance increases due to the increase in the number of pixels. In addition, there is a problem that display is seriously affected, for example, the image is not added to the pixels and a sufficient contrast cannot be obtained. As a method of reducing the wiring resistance, it is conceivable to take a countermeasure by increasing the width of the video signal wiring, but this has caused problems such as a decrease in the aperture ratio and an increase in the parasitic capacitance at the intersection.

In a conventional liquid crystal panel in which the video signal wiring (source) 12 and the common electrode 14a are arranged so as to overlap with the insulating layer 6 interposed therebetween, the video signal wiring (source) is used.
When the area where the electrode 12 and the common electrode 14a overlap is increased, the formed capacitance is extremely increased, so that the signal waveform is further greatly distorted, and the liquid crystal panel cannot be adapted to a large screen or high definition.

The present invention has been made in view of the above-mentioned disadvantages of the conventional liquid crystal panel. In a horizontal electric field type liquid crystal panel, the capacitance formed by the video signal wiring is small and the wiring resistance does not increase. It is an object of the present invention to provide a liquid crystal panel in which distortion of a signal waveform is suppressed to a minimum and a sufficient signal can be written to a pixel even if the screen is enlarged and the definition is increased.

[0015]

In order to achieve the above object, a liquid crystal panel according to the present invention faces a liquid crystal layer with a liquid crystal layer interposed therebetween.
Of the two transparent substrates, the video signal wiring and the scanning signal wiring arranged in a matrix on the side opposite to one of the substrates, and the switching provided corresponding to each intersection of the video signal wiring and the scanning signal wiring. In a liquid crystal panel having at least an element, a pixel electrode connected to the switching element, a common electrode formed so as to face the pixel electrode, and a common wiring connecting the common electrode, the wiring width of the common wiring is It is configured to be formed narrow at the intersection with the signal wiring.

The second liquid crystal panel includes a matrix of video signal wirings and scanning signal wirings arranged on the opposite side of one of the two transparent substrates sandwiching the liquid crystal layer therebetween. A switching element provided corresponding to each intersection of the video signal wiring and the scanning signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and connecting the common electrode. In a liquid crystal panel on which at least a common wiring is formed,
The insulating layer formed between the video signal wiring and the common wiring is formed to be thicker than the insulating layer formed between the pixel electrode and the common wiring or the common electrode to form the storage capacitor. Have been.

The third liquid crystal panel is composed of two transparent substrates opposed to each other with a liquid crystal layer interposed therebetween, the video signal wiring and the scanning signal wiring being arranged in a matrix on the opposite surface side of one of the substrates. A switching element provided corresponding to each intersection of the video signal wiring and the scanning signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and connecting the common electrode. In a liquid crystal panel on which at least a common wiring is formed,
The video signal wiring and the common electrode are configured to overlap in a substrate plane via an insulating layer, and the common electrode is configured to be divided into two at a portion where the common electrode overlaps the video signal wiring. .

According to the above configuration, in the first liquid crystal panel, the overlapping area of the video signal wiring and the common wiring is reduced by forming the wiring width of the common wiring narrow at the intersection with the video signal wiring. Accordingly, the capacitance generated in the video signal wiring can be reduced in proportion to the area, and the distortion of the signal waveform can be suppressed.

In the second liquid crystal panel, by increasing the thickness of the insulating layer functioning as a dielectric, the capacitance generated in the video signal wiring can be reduced, and the distortion of the signal waveform can be suppressed. The insulating layer forming the storage capacitor portion is formed so as not to be thick, so that the capacity of the storage capacitor portion is not reduced, and a problem does not occur in holding the liquid crystal.

Further, in the third liquid crystal panel, by dividing the common electrode into two portions at the portion overlapping with the video signal wiring, the area where the video signal wiring and the common electrode overlap can be reduced, which is generated in the video signal wiring. Reduce the capacity,
The distortion of the signal waveform can be reduced.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal panel of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a plan view showing an electrode configuration of one pixel of a liquid crystal panel according to the present invention, FIG. 2 is a sectional view taken along line AA 'in FIG. 1, and FIG. 3 intersects a video signal line. It is a figure showing a situation of common wiring of the neighborhood. Hereinafter, embodiments of the liquid crystal panel shown in FIGS. 1 and 2 will be described.

1 and 2, reference numeral 1 denotes a scanning signal line (gate) formed on an array substrate 10a based on a glass substrate, and 2 denotes a video signal line (source). G) are formed in a matrix with 1 and a semiconductor layer 5 as an active element (switching element) is formed at the intersection thereof.
Thin film transistor (TFT)
stor) is formed. Reference numeral 3 denotes a pixel electrode formed in a comb shape and connected to the video signal wiring (source) 2 via the semiconductor layer 5. Reference numeral 4 denotes a common electrode / wiring connected by a common wiring 4c. The common electrodes 4a and 4b are formed at regular intervals so as to face the pixel electrode 3. In the present embodiment, the shape of the pixel electrode is comb-shaped, but is not limited to this shape, and may be, for example, a mouth shape or a T-shape.

A video signal wiring (source) 2, a pixel electrode 3,
The scanning signal wiring (gate) 1 and the common electrode / wiring 4 are made of Al
/ Ti and the like, and as shown in FIG. 2, a video signal wiring (source) 2 and a pixel electrode 3, a scanning signal wiring (gate) 1 and a common electrode.
The wiring 4 is formed via an insulating layer 6 of SiO2 or the like. At this time, the width of the common wiring 4c is reduced to half at a portion 4d crossing the video signal wiring (source) 2 as shown in FIG. It is formed as follows. In addition, a storage capacitor section 9 is formed between the common line 4c and the opposing pixel electrode 3, and the voltage supplied to the pixel by the storage capacitor section 9 is held.

The array substrate 1 formed as described above
A color filter substrate 10b formed on the basis of a glass substrate is disposed so as to face 0a, and an alignment film (AL5417: manufactured by JSR) is printed on the facing surface side of the array substrate 10a and the color filter substrate 10b, and rubbing is performed. The treatment has been applied. A black mask 18BM and color filters 18R, 18G, and 18B are formed on the color filter substrate 10b on the side of the array substrate 10a.

According to the above configuration, the video signal wiring (source)
(2) In the portion intersecting with (2), the width of the common line (4c) is reduced to half so that the video signal line (source) (2)
The parasitic capacitance generated between the video signal wiring and the common wiring 4c can be halved, so that distortion of the signal waveform on the video signal wiring can be reduced.

In this embodiment, the wiring width of the common wiring at the portion intersecting with the common video signal wiring is reduced to half, but the wiring resistance of the common wiring is slightly increased by reducing the wiring width. Therefore, it is more preferable to finally calculate the time constant in consideration of the balance between the resistance increase and the capacitance decrease and determine the wiring width of the common wiring so as to minimize the value of the time constant.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 4 shows a second embodiment of the present invention.
FIGS. 5 and 6 are plan views showing the configuration of the color filter substrate of the liquid crystal panel in the embodiment of FIG.
It is sectional drawing of the liquid crystal panel of a position. Hereinafter, differences from the first embodiment will be described.

As shown in FIG. 5, the insulating layer 6 is sandwiched between the pixel electrode 3 and the common wiring 4c at a portion 6a where the video signal wiring (source) 2 and the common wiring 4c intersect. The layer thickness is twice as thick as the portion 6b to be formed.

According to the above configuration, the video signal wiring (source)
(2) In the portion where 2 and the common wiring 4c intersect, the insulating layer is doubled so that the video signal wiring (source)
The parasitic capacitance generated between the second and common wirings 4c can be halved, and the wiring resistance does not increase, so that distortion of the signal waveform on the video signal wiring can be reduced. At the same time, in the storage capacitor portion, the insulating layer is formed so as not to have a large thickness, so that a decrease in the liquid crystal holding voltage due to a reduction in the storage capacitor can be prevented.

In this embodiment, the thickness of the insulating layer at the intersection of the video signal wiring (source) 2 and the common wiring 4c is doubled, but the present invention is not limited to this value. For example, this magnification may be small as long as a sufficient signal waveform and storage capacity for display can be obtained, or when distortion of the signal waveform increases due to an increase in the number of pixels, or when a sufficient storage capacity is obtained. If not, the above effect is further enhanced by further increasing the magnification. Further, the effect of the present invention can be further enhanced by combining with the method of reducing the wiring width of the common wiring 4c as in the first embodiment.

As for the method of forming the insulating layer, CVD is used.
After a material to be an insulating layer is formed on the electrode by a sputtering method or a sputtering method, the storage capacitor portion 9 may be etched until the layer thickness is reduced to half, or as shown in FIG. After forming the first layer, the second layer is formed and the storage capacitor portion 9 is formed.
The portion may be formed by etching. In this case,
The above effect can be further enhanced by using a material having a large relative dielectric constant for the first layer and using a material having a small relative dielectric constant for the second layer. The insulating layer material is not particularly limited as long as it can form an insulating layer having a transparency of several hundred angstroms to several μm, such as a ceramic material such as a nitride or an oxide, or an organic material such as a photosensitive resin. . As for the forming method, for example, a spin coating method may be used as long as the material is an organic material or the like. In this case, the insulating layer can be formed more easily.

(Embodiment 3) Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. 7 is a plan view showing an electrode configuration of one pixel of the liquid crystal panel according to the present invention, FIG. 8 is a cross-sectional view taken along the line AA ′ in FIG. 7, and FIG. 9 is a view showing a state of a common electrode near the video signal line. is there. The differences from the first and second embodiments will be described.

As shown in FIGS. 7 to 9, the common electrode 4 is arranged so as to overlap the video signal wiring 2 via the insulating layer 6, and the common electrode 4 arranged so as to overlap the video signal wiring 2 4e and 4f.

According to the above configuration, the video signal wiring (source)
2) The common electrode 4 is divided into two portions at the portion overlapping with the video signal wiring (source) 2, so that the area of the portion overlapping with the video signal wiring (source) 2 can be greatly reduced. 2) Parasitic capacitance generated between 2 and the common electrode 4 can be reduced. Thereby, even when the video signal wiring and the common electrode overlap, the distortion of the signal waveform on the video signal wiring can be suppressed to a small level.

In order to prevent the influence of the electric field generated between the video signal wiring (source) and the common electrode from affecting the electric field of the display portion, as shown in FIGS. More preferably, it is formed so that the video signal wiring (source) 2 is disposed in the wiring 4.

Further, the method of reducing the wiring width of the common wiring 4c as in the first embodiment, or increasing the thickness of the insulating layer between the video signal wiring (source) 2 and the common electrode / wiring 4 as in the second embodiment. The invention effect can be further enhanced by combining with the forming method.

(Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a plan view showing a configuration of a color filter substrate of a liquid crystal panel according to a fourth embodiment of the present invention. In this embodiment, the first and second pixel electrodes 3, the common electrode 4, and the video signal wiring (source) 2 have the same bent shape except for the same angle.
The configuration is the same as that of the embodiment.

As described above, even in the liquid crystal panel in which the pixel electrode, the common electrode, and the video signal wiring (source) are bent, the width of the common wiring is formed to be narrow at the intersection with the video signal wiring. Thus, the area where the video signal wiring and the common wiring overlap can be reduced, whereby the capacitance generated in the video signal wiring can be reduced in proportion to the area, and the distortion of the signal waveform can be suppressed. Alternatively, the parasitic capacitance generated between the video signal wiring (source) and the common wiring is reduced by doubling the insulating layer at the intersection of the video signal wiring (source) and the common wiring. Since it can be halved and the wiring resistance does not increase, distortion of the signal waveform on the video signal wiring can be reduced.

In this embodiment, the video signal wiring (source) is also bent like the pixel electrode and the common electrode. However, only the pixel electrode and the common electrode are bent, and the video signal wiring (source) is formed. May have a linear shape as in the first embodiment.

Embodiment 5 Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 11 is a plan view showing a configuration of a color filter substrate of a liquid crystal panel according to a fifth embodiment of the present invention. In the present embodiment, the configuration is the same as that of the third embodiment, except that the pixel electrode 3, the common electrode 4, and the video signal wiring (source) 2 have the same bent shape at the same angle.

As described above, even in a liquid crystal panel in which the pixel electrode, the common electrode, and the video signal wiring (source) are formed in a bent shape, two common electrodes are provided in a portion overlapping the video signal wiring (source). By being divided into
The area of the portion overlapping with the video signal wiring (source) can be greatly reduced, and the parasitic capacitance generated between the video signal wiring (source) and the common electrode can be reduced. Thereby, even when the video signal wiring and the common electrode overlap, the distortion of the signal waveform on the video signal wiring can be suppressed to a small level.

[0043]

As described above, the first liquid crystal panel of the present invention is one of the two transparent substrates opposed to each other with the liquid crystal layer interposed therebetween.
On the opposite surface side of one of the substrates, video signal wiring and scanning signal wiring arranged in a matrix, switching elements provided corresponding to each intersection of the video signal wiring and scanning signal wiring, connected to the switching element. In a liquid crystal panel having at least a pixel electrode, a common electrode formed so as to face the pixel electrode, and a common line connecting the common electrode, the width of the common line is the width at the intersection with the video signal line. By being formed to be narrow, it is possible to reduce the area where the video signal wiring and the common wiring overlap, thereby reducing the capacitance generated in the video signal wiring in proportion to the area, and distorting the signal waveform. Can be kept small.

The second liquid crystal panel is composed of two transparent substrates opposed to each other with a liquid crystal layer interposed therebetween, and has a video signal wiring and a scanning signal wiring arranged in a matrix on the opposite surface side of one of the substrates. A switching element provided corresponding to each intersection of the video signal wiring and the scanning signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and connecting the common electrode. In a liquid crystal panel on which at least a common wiring is formed,
The insulating layer formed between the video signal wiring and the common wiring is formed to be thicker than the insulating layer formed between the pixel electrode and the common wiring or the common electrode to form the storage capacitor. As a result, video signal wiring (source
) And the common wiring can be reduced, and the wiring resistance does not increase, so that distortion of the signal waveform on the video signal wiring can be reduced.

The third liquid crystal panel is composed of two transparent substrates opposed to each other with a liquid crystal layer interposed therebetween, on one of the opposing surfaces of one of the transparent substrates, a video signal wiring and a scanning signal wiring arranged in a matrix. A switching element provided corresponding to each intersection of the video signal wiring and the scanning signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and connecting the common electrode; In a liquid crystal panel on which at least a common wiring is formed,
The video signal wiring and the common electrode are configured to overlap in a substrate surface via an insulating layer, and the common electrode is configured to be divided into two at a portion where the common electrode overlaps the video signal wiring. Video signal wiring (source)
Can be greatly reduced, and the parasitic capacitance generated between the video signal wiring (source) and the common electrode can be reduced. Thereby, even when the video signal wiring and the common electrode are overlapped, distortion of the signal waveform on the video signal wiring can be suppressed to be small.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an electrode configuration of one pixel of a liquid crystal panel according to a first embodiment.

FIG. 2 is a sectional view of the liquid crystal panel taken along the line AA ′ in the first embodiment.
Sectional view

FIG. 3 is a diagram showing a common wiring near an intersection with a video signal line of the liquid crystal panel in the first embodiment.

FIG. 4 is a plan view schematically showing an electrode configuration of one pixel of a liquid crystal panel according to a second embodiment.

FIG. 5 is a cross-sectional view taken along line BB ′ of the liquid crystal panel according to the second embodiment.
Sectional view

FIG. 6 is a sectional view taken along the line BB ′ showing another example of the liquid crystal panel in the second embodiment.

FIG. 7 is a plan view schematically showing an electrode configuration of one pixel of a liquid crystal panel in the third embodiment.

FIG. 8 is a sectional view taken along line AA ′ of the liquid crystal panel according to the third embodiment.
Sectional view

FIG. 9 is a diagram showing a common electrode in the vicinity of a liquid crystal panel overlapping with a video signal line in Embodiment 3;

FIG. 10 is a plan view schematically showing an electrode configuration of one pixel of a liquid crystal panel according to a fourth embodiment.

FIG. 11 is a plan view schematically showing an electrode configuration of one pixel of a liquid crystal panel in a fifth embodiment.

FIG. 12 is a plan view schematically showing an electrode configuration of one pixel in a conventional liquid crystal panel.

FIG. 13 shows a liquid crystal panel B- in a conventional liquid crystal panel.
B 'sectional view

FIG. 14 is a plan view schematically showing an electrode configuration of one pixel in a conventional liquid crystal panel.

FIG. 15 shows A- of the liquid crystal panel in the conventional liquid crystal panel.
A 'sectional view

[Explanation of symbols]

 Reference Signs List 1 scanning signal wiring (gate) 2 video signal wiring (source) 3a pixel electrode 4a common electrode 4b common electrode 4c common wiring 5 semiconductor layer 6 insulating layer 7 liquid crystal layer 8R red color filter 8G green color filter 8B blue color filter 8BM black matrix 9 storage capacitor section 10a array substrate 10b color filter substrate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirofumi Yamakita 1006 Kazuma Kadoma, Kazuma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 72) Inventor Akinori Shioda 1006 Kazuma Kadoma, Kadoma-shi, Osaka F-term (reference) in Matsushita Electric Industrial Co., Ltd. MA15 MA16 MA18 MA19 MA20 MA31 MA35 MA37 MA41 NA04 NA25 NA27 PA02 PA08 QA06 QA18

Claims (5)

[Claims] 1. A video signal wiring and a scanning signal wiring, and a video signal wiring and a scanning signal, which are arranged in a matrix on a facing surface side of one of two transparent substrates sandwiching a liquid crystal layer therebetween. At least a switching element provided corresponding to each intersection of the signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and a common wiring connecting the common electrode are formed. Wherein the width of the common wiring is narrower at the intersection with the video signal wiring. 2. A video signal wiring and a scanning signal wiring, and a video signal wiring and a scanning signal, which are arranged in a matrix on two opposing transparent substrates sandwiching a liquid crystal layer therebetween and facing one of the substrates. At least a switching element provided corresponding to each intersection of the signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and a common wiring connecting the common electrode are formed. In the liquid crystal panel, the insulating layer formed between the video signal wiring and the common wiring is formed thicker than the insulating layer formed between the pixel electrode and the common electrode. panel. 3. A video signal wiring and a scanning signal wiring, and a video signal wiring and a scanning signal, which are arranged in a matrix on the opposing surface of one of two transparent substrates sandwiching a liquid crystal layer. At least a switching element provided corresponding to each intersection of the signal wiring, a pixel electrode connected to the switching element, a common electrode formed to face the pixel electrode, and a common wiring connecting the common electrode are formed. In the liquid crystal panel, the video signal wiring and the common electrode are configured to overlap in a substrate surface via an insulating layer, and the portion where the common electrode overlaps the video signal wiring is divided into two parts. A liquid crystal panel. 4. The liquid crystal panel according to claim 1, wherein the pixel electrode and the common electrode have a bent shape. 5. The liquid crystal panel according to claim 1, wherein the video signal wiring has a shape bent at the same angle as the common electrode.