JP2003021843A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid crystal from being affected by material in a sealing material. SOLUTION: A switching element operated by a scanning signal from a gate signal line, a pixel electrode to which a video signal from a drain signal line is supplied via the switching element and a counter substrate generating an electric field between the counter substrate and the pixel electrode are formed in each pixel area of the surface on the liquid crystal side of one substrate of substrates disposed opposite to each other via a liquid crystal. The counter substrate is formed on the upper surface of an insulation coating film formed by covering the switching element and the pixel electrode and connected to a circular bus line enclosing the periphery of the assembling body of each pixel area and the bus line is formed within the area enclosed by the sealing material both for sealing the liquid crystal and for fixing the one substrate to the other substrate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device called an in-plane switching mode.

[0002]

2. Description of the Related Art A liquid crystal display device called a horizontal electric field type is
A pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed in each pixel region on the liquid crystal side of one transparent substrate among the transparent substrates arranged to face each other via the liquid crystal,
The light transmittance of the liquid crystal is controlled by the component of the electric field that is substantially parallel to the transparent substrate.

As an application of such a structure to an active matrix type, a gate signal line extending in the x direction and arranged side by side in the y direction is formed on the liquid crystal side surface of the one transparent substrate. Each region surrounded by drain signal lines extending in the y direction and arranged in parallel in the x direction is defined as a pixel region, and a switching element that operates by a scanning signal from the gate signal line is provided in each of these pixel regions and the switching element. The pixel electrode to which the video signal from the drain signal line is supplied via the element and the counter electrode which is arranged close to the pixel electrode are formed.

The one transparent substrate and the other transparent substrate are fixed to each other by a sealing material which also serves as an encapsulation of the liquid crystal, and a liquid crystal display section composed of an assembly of the respective pixel areas is surrounded by the sealing material. Are formed.

[0005]

However, it has been confirmed that in such a liquid crystal display device, a display defect is likely to occur around the liquid crystal display portion.

Then, as a result of pursuing this cause, it was found that the material in the sealing material, which is a contamination source for the liquid crystal, penetrates into the liquid crystal.

In the case of the horizontal electric field system, the electric field generated between the pixel electrode and the counter electrode is relatively small, and therefore the influence of the above-mentioned material on the behavior of the liquid crystal cannot be ignored.

The present invention has been made under these circumstances, and an object thereof is to provide a liquid crystal display device in which the influence of the material in the sealing material on the liquid crystal is prevented.

[0009]

Among the inventions disclosed in the present application, a brief description will be given to the outline of typical ones.
It is as follows.

Means 1. A liquid crystal display device according to the present invention includes, for example, a switching element operated by a scanning signal from a gate signal line in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal from the drain signal line is supplied via the switching element and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode is the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating formed to cover the periphery of the aggregate of the pixel regions, and the bus line also serves as the liquid crystal encapsulation. It is characterized in that it is formed in a region surrounded by a sealing material for fixing the other substrate.

Means 2. A liquid crystal display device according to the present invention includes, for example, a switching element operated by a scanning signal from a gate signal line in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal from the drain signal line is supplied via the switching element and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode is the switching element and the pixel electrode. Is formed on the upper surface of an insulating coating formed of an organic material layer that covers the pixel electrode, and is integrally connected to a bus line made of the same material as the annular counter electrode surrounding the periphery of the aggregate of the pixel regions, The bus line is formed in a region surrounded by a sealing material for fixing the one substrate and the other substrate while also enclosing the liquid crystal.

Means 3. A liquid crystal display device according to the present invention includes, for example, a switching element operated by a scanning signal from a gate signal line in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal from the drain signal line is supplied via the switching element and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode is the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating formed to cover the periphery of the aggregate of the pixel regions, and the bus line also serves as the liquid crystal encapsulation. It is characterized in that it is formed in a region surrounded by a sealing material for fixing the other substrate, and the whole region is covered with an alignment film.

Means 4. A liquid crystal display device according to the present invention includes, for example, a switching element operated by a scanning signal from a gate signal line in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal from the drain signal line is supplied via the switching element and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode is the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating formed to cover the periphery of the aggregate of the pixel regions, and the bus line also serves as the liquid crystal encapsulation. It is formed in a region surrounded by a sealing material that secures the other substrate, and is formed so as to extend outside the black matrix formed on the liquid crystal side surface of the other substrate. And it is characterized in that is.

Means 5. A liquid crystal display device according to the present invention includes, for example, a switching element operated by a scanning signal from a gate signal line in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal from the drain signal line is supplied via the switching element and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode is the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating formed to cover the periphery of the aggregate of the pixel regions, and the bus line also serves as the liquid crystal encapsulation. It is characterized in that it is formed in a region surrounded by a sealing material for fixing the other substrate and a hole is formed along the longitudinal direction thereof.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a liquid crystal display device according to the present invention will be described below with reference to the drawings.

Example 1. << Equivalent Circuit >> FIG. 2 is an equivalent circuit diagram showing an embodiment of the liquid crystal display device according to the present invention. Although this figure is an equivalent circuit diagram, it is drawn corresponding to the actual geometrical arrangement.

In FIG. 2, there are a pair of transparent substrates SUB1 and SUB2 arranged to face each other with a liquid crystal interposed therebetween, and the liquid crystal is enclosed by a sealing material SL which also fixes one transparent substrate SUB1 to the other transparent substrate SUB2. ing.

On the liquid crystal side surface of the one transparent substrate SUB1 surrounded by the sealing material SL, the gate signal lines GL extending in the x direction and juxtaposed in the y direction and the y direction extending in the y direction are formed. A drain signal line DL is formed side by side in the direction.

Each gate signal line GL and each drain signal line D
The region surrounded by L and L constitutes a pixel region, and the matrix-shaped aggregate of these pixel regions is the liquid crystal display unit A.
It constitutes R.

Further, a common counter voltage signal line CL running in each pixel area is formed in each of the pixel areas arranged in parallel in the x direction. The counter voltage signal line CL serves as a signal line for supplying a reference voltage for a video signal to a counter electrode CT described later in each pixel region.

Further, a voltage is supplied to each of these counter voltage signal lines CL from a counter voltage terminal CTM via a counter electrode bus line CBL. The counter electrode bus line CBL is formed in an annular pattern surrounding the liquid crystal display part AR in the region between the liquid crystal display part AR and the seal material SL.

In each pixel region, a thin film transistor TFT operated by a scanning signal from the gate signal line GL on one side and a pixel electrode to which a video signal from the drain signal line DL on one side is supplied via the thin film transistor TFT. PX is formed.

This pixel electrode PX generates an electric field between the counter voltage signal line CL and the counter electrode CT connected thereto, and the electric field controls the light transmittance of the liquid crystal.

One end of each of the gate signal lines GL extends beyond the sealing material SL, and the extending end constitutes a terminal to which the output terminal of the vertical scanning drive circuit V is connected. . Further, a signal from a printed circuit board arranged outside the transparent substrate SUB1 is input to the input terminal of the vertical scanning drive circuit V.

The vertical scanning drive circuit V comprises a plurality of semiconductor devices, a plurality of gate signal lines adjacent to each other are grouped, and one semiconductor device is applied to each of these groups. There is.

Similarly, one end of each of the drain signal lines DL extends beyond the sealing material SL, and the extended end constitutes a terminal to which the output terminal of the video signal driving circuit He is connected. Has become. Further, the input terminal of the video signal drive circuit He is adapted to receive a signal from a printed circuit board arranged outside the transparent substrate SUB1.

The video signal drive circuit He is also composed of a plurality of semiconductor devices, and a plurality of drain signal lines DL adjacent to each other are grouped so that one semiconductor device is assigned to each group. Has become.

One of the gate signal lines GL is sequentially selected by the scanning signal from the vertical scanning circuit V.

Further, a video signal is supplied to each of the drain signal lines DL by a video signal drive circuit He at the timing of selecting the gate signal line GL. << Structure of Pixel >> FIG. 3 is a plan view showing an embodiment of the structure of the pixel region, and shows the structure shown in the circle in FIG. A cross section taken along line IV-IV in FIG. 3 is shown in FIG.

In FIG. 3, a pair of gate signal lines GL extending in the x direction and arranged in parallel in the y direction are first formed on the surface of the transparent substrate SUB1 on the liquid crystal side.

These gate signal lines GL surround a rectangular region together with a pair of drain signal lines DL which will be described later, and this region is constituted as a pixel region.

An insulating film GI made of, for example, SiN is formed on the surface of the transparent substrate SUB1 on which the gate signal lines GL have been formed as described above so as to cover the gate signal lines GL as well.

The insulating film GI functions as an interlayer insulating film for the gate signal line GL in the formation region of the drain signal line DL described later, and as a gate insulation film in the formation region of the thin film transistor TFT described later. In the formation region of the capacitive element Cstg, which will be described later, the film has a function as a dielectric film.

On the surface of this insulating film GI,
A semiconductor layer AS made of, for example, amorphous Si is formed so as to overlap a part of the gate signal line GL.

This semiconductor layer AS is a thin film transistor T.
By forming the drain electrode SD1 and the source electrode SD2 on the upper surface of the FT, the MI of the inverted stagger structure in which a part of the gate signal line GL is used as the gate electrode.
An S-type transistor can be constructed.

Here, the drain electrode SD1 and the source electrode SD2 are formed at the same time when the drain signal line DL is formed.

That is, the drain signal line DL extending in the y direction and arranged in parallel in the x direction is formed, and a part of the drain signal line DL extends to the upper surface of the semiconductor layer AS to form the drain electrode SD.
1 is formed, and the source electrode SD2 is formed apart from the drain electrode SD1 by the channel length of the thin film transistor TFT.

The source electrode SD2 extends from the surface of the semiconductor layer AS toward the pixel region side, and the extending portion extends, for example, in the (+) y direction in the drawing, and then in the (+) x direction. The pixel electrode PX is formed as a “U” -shaped pattern such as in the (−) y direction.

In this case, the pixel electrode PX is formed as two pixel electrodes (pixel electrode group) extending in the y direction in the pixel region and juxtaposed in the x direction.

Here, the material of the pixel electrode PX is made of the same material as the drain signal line DL as described above. However, the present invention is not limited to this, and the drain signal line DL may be made of a different material. In this case, there is no choice but to form the drain signal line DL in a step different from the step of forming the drain signal line DL.
(Indium Tin Oxide) or the like can be used for the translucent material, and the aperture ratio of the pixel can be improved.

The semiconductor layer AS and the drain electrode SD1
A thin layer doped with a high concentration of impurities is formed at the interface with the source electrode SD2, and this layer functions as a contact layer.

This contact layer is, for example, the semiconductor layer A.
When S is formed, a high-concentration impurity layer is already formed on the surface thereof, and the drain electrode SD1 formed on the upper surface of the impurity layer is formed.
And the impurity layer exposed from the pattern of the source electrode SD2 as a mask may be etched.

As described above, the transparent substrate SUB1 on which the thin film transistor TFT, the drain signal line DL, the drain electrode SD1 and the source electrode SD2 are formed has a protective film PSV1 made of, for example, SiN, and an organic material layer on the upper surface thereof. A protective film PSV2 is formed.

The protective films PSV1 and PSV2 are intended to prevent direct contact of the thin film transistor TFT with the liquid crystal to prevent characteristic deterioration of the thin film transistor TFT, and the protective film PSV2 made of an organic material layer is used. The reason is to lower the dielectric constant of the entire protective film.

A counter electrode CT is formed on the upper surface of the protective film PSV2. The counter electrode CT overlaps with the counter electrode CT extending at least in the y direction in the drawing in the center of the pixel region, and the drain signal line DL arranged on both sides of the pixel region and more than the drain signal line DL. The electrode group is composed of a wide pixel electrode CT.

The reason why the width of the counter electrode CT overlapping the drain signal line DL is larger than that of the drain signal line DL is that the electric field from the drain signal line DL is above the counter electrode. This is to facilitate termination to CT and prevent termination to the pixel electrode PX.
This is because if the electric field ends in the pixel electrode PX, it becomes noise.

Then, each of the counter electrodes CT is integrally formed with a conductive layer made of the same material as that of the counter electrode CT overlapped with the gate signal line GL so that they are electrically connected to each other. Has become.

In other words, for each counter electrode CT, the conductive layer formed over the entire area of the liquid crystal display portion AR is provided with a hole at the portion where the pixel electrode PX extending in the y direction in the drawing and the portions on both sides thereof are punched. It is formed by

The counter electrode CT thus constructed is formed so as to overlap the portion of the pixel electrode PX extending in the x direction in the drawing, and the capacitive element Cstg is formed at this overlapping portion. There is.

The capacitive element Cstg has a function of accumulating, for example, a video signal supplied to the pixel electrode PX for a relatively long time.

Here, the counter electrode CT is made of a non-translucent material (for example, Al, Cr, Mo, T) made of metal.
a, W, Ti, Ni, Cu, etc.), and in order to improve the aperture ratio, for example, ITO, IZO
It may be made of a translucent material such as.

An alignment film (not shown) is formed on the upper surface of the transparent substrate on which the counter electrode CT is thus formed so as to cover the counter electrode CT. This alignment film is a film that directly contacts the liquid crystal, and the rubbing formed on the surface determines the initial alignment direction of the molecules of the liquid crystal. << Bus Line of Counter Electrode >> FIG. 1 is a plan view showing an embodiment of the liquid crystal display device having the above-described pixel, and is a view corresponding to FIG.

In FIG. 1, a counter electrode bus line CBL is formed in a region inside the seal material SL and outside the liquid crystal display portion AR, and the counter electrode bus line CBL has a relatively wide width (at least a counter voltage). It is formed thicker than the signal line CL) and is formed so as to surround the liquid crystal display portion AR.

The counter electrode bus line CBL may be formed as an extension of the counter electrode CT shown in FIG.
Further, it may be configured as a conductive layer different from the counter electrode CT.

By forming in this way, when a contaminant to the liquid crystal among the materials forming the seal material SL enters the liquid crystal of the liquid crystal display section AR, it is formed relatively wide. It must pass over the counter electrode bus line CBL and is trapped by the counter electrode bus line CBL.

As a result, it is possible to avoid the influence of the contaminants in the seal material SL on the liquid crystal display. Particularly, in a liquid crystal display device using a so-called lateral electric field, liquid crystal molecules rotate in a plane parallel to the substrate, and contaminants are easily diffused by the rotational movement. Therefore, the counter electrode bus line CBL improves reliability. It is even more prominent.

The counter electrode bus line CBL is
Since the counter electrode bus line CBL having a relatively wide width is interposed between the counter voltage terminal CTM and each counter electrode CT, the resistance of the entire conductive layer can be reduced. It is possible to reduce signal waveform distortion and the like.

In such an active matrix type liquid crystal display device, a so-called dummy pixel region is usually formed in a region between the liquid crystal display portion AR and the seal material SL.

Here, the dummy pixel region has the same structure as the pixel region that contributes to the liquid crystal display. For example, the pixel region that contributes to display is made to have the same capacitance and the like, and the dummy pixel region is surrounded by the dummy pixel region. It is provided in order to avoid display defects in the pixel region that contributes to liquid crystal display.

Therefore, by forming the counter electrode bus line CBL in the area where the dummy pixel area is formed, there is an effect that a so-called dead space can be effectively used.

Example 2. FIG. 5 is a cross-sectional view showing the positional relationship between the counter electrode bus line CBL and the black matrix BM formed on the transparent substrate SUB2 side on the premise of the configuration of the first embodiment described above. This cross-sectional view is V of FIG.
It is shown on the -V line.

Here, the black matrix BM is
The light-shielding film formed on the liquid crystal side surface of the transparent substrate SUB2 has an opening formed in the central portion of each pixel region except the periphery thereof. The periphery of the black matrix BM is positioned outside the liquid crystal display portion AR so that it does not contact the seal material SL.

On the other hand, the counter electrode bus line CBL formed on the transparent substrate SUB1 side extends up to the middle of the formation region of the sealing material SL, and the black matrix B is formed.
It shares some of M's functions.

Therefore, in this embodiment, the counter electrode bus line CBL is formed of a non-translucent conductor such as metal.

In FIG. 5, the black matrix BM is provided on the transparent substrate SUB2 side for simplification of description.
Although only the color filter is formed, it goes without saying that a color filter for color display, a flattening film for flattening the surface, an alignment film, and the like are formed.

However, it goes without saying that the color filter and the flattening film may not be formed if necessary.

Example 3. FIG. 6 is a sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The configuration different from that of FIG. 5 is that the black matrix BM is provided in the periphery of the transparent substrate SUB2.
(2) is formed, and the black matrix BM (2) is formed.
Is a black matrix B formed on the liquid crystal display AR side
It is formed by being physically separated from M.

At this separation point, the counter electrode bus line CBL is overlapped with the counter electrode bus line CBL in a plan view, so that the same effect as that of forming the light shielding film over the entire area of the transparent substrate SUB2 can be obtained. It has become.

In this case, since the sealing material SL is partially formed directly on the transparent substrate SUB2 (without interposing the black matrix BM), the sealing material SL is formed.
The reliability of adhesion of the transparent substrate SUB2 to the transparent substrate SUB2 can be maintained.

Example 4. FIG. 7 is a sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The structure different from the case of FIG. 6 is that the black matrix BM,
Although at least one of the BM (2) and the counter electrode bus line CBL is shielded from light, the light is not shielded at the portion where the seal material SL is formed.

This is based on the reason that light shielding is not particularly required in the portion where the sealing material SL is formed, or that the sealing material SL can be made to function as a light shielding material by containing a pigment therein.

Further, with such a configuration,
The reliability of adhesion of the seal material SL to the transparent substrates SUB1 and SUB2 can be maintained.

Example 5. FIG. 8 is a sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The structure different from the case of FIG.
The black matrix BM formed on the R side is formed so as to partially overlap the sealing material SL on the inner peripheral side thereof.

In this case, even if the seal material SL does not contain a pigment for light shielding, the light can be reliably shielded.

Example 6. FIG. 9 is a cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The configuration different from the case of FIG. 8 is that the counter electrode bus line CBL is formed of a translucent conductive film such as an ITO film and extends to the outside of the seal material SL. is there.

In this case, the liquid crystal can be driven in a so-called normal black mode, and the counter electrode bus line CBL can function as a light shielding film.

The counter electrode bus line CBL formed of ITO or the like is extended to the outside of the seal material SL because the function as a light shielding film is exerted over a wide range. This is because it is composed of a material that is difficult to be oxidized even if it is applied to all the users, and there is no fear of so-called electrolytic corrosion.

By doing so, there is also an effect that a terminal for inputting a counter voltage signal to the counter electrode bus line CBL can be formed at an arbitrary position.

Example 7. FIG. 10 is a cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention, showing a cross section taken along line VV of FIG.

In this embodiment, the counter electrode bus line CB is used.
The positional relationship between L and the alignment film ORI1 formed on the upper surface of the counter electrode bus line CBL is defined.

As is clear from FIG. 10, the alignment film ORI
Reference numeral 1 is formed so as to completely cover the counter electrode bus line CBL. By doing so, the orientation film ORI1 can prevent the occurrence of electrolytic corrosion on the counter electrode bus line CBL.

Example 8. FIG. 11 is a cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention, which is a plan view of a portion surrounded by a dotted line frame Q in FIG.

In FIG. 11, the counter electrode bus line CB
A large number of holes HOL are formed in L along the longitudinal direction. This hole HOL is for preventing electrolytic corrosion of the counter electrode bus line CBL, and even if electrolytic corrosion occurs around the counter electrode bus line CBL due to the existence of this hole HOL, it is stopped by the hole HOL. Will be able to hinder the progress of.

Example 9. FIG. 12 is a sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The structure different from the case of FIG. 11 is such that a part of the counter electrode bus line CBL is extended to the outside of the seal material SL and the counter voltage signal is supplied from this extended portion.

Example 10. FIG. 13 is a cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention and corresponds to FIG.

The configuration different from the case of FIG. 12 is that a plurality of holes HOL for preventing electrolytic corrosion formed in the longitudinal direction of the counter electrode bus line CBL are formed in another stage in the width direction.

[0092]

As is apparent from the above description,
According to the liquid crystal display device of the present invention, it is possible to prevent the material in the sealing material from affecting the liquid crystal.

[0093]

[Brief description of drawings]

FIG. 1 is a plan view showing an entire embodiment of a liquid crystal display device according to the present invention.

FIG. 2 is an equivalent circuit diagram showing an entire embodiment of a liquid crystal display device according to the present invention.

FIG. 3 is a plan view showing an embodiment of a pixel of the liquid crystal display device according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 6 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 7 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 8 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 9 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 10 is a partial cross-sectional view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 11 is a partial plan view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 12 is a partial plan view showing another embodiment of the liquid crystal display device according to the present invention.

FIG. 13 is a partial plan view showing another embodiment of the liquid crystal display device according to the present invention.

[Explanation of symbols]

CBL ... Counter electrode bus lines, SUB1, SUB2 ... Transparent substrate, GL ... Gate signal line, DL ... Drain signal line,
AS ... Semiconductor layer, TFT ... Thin film transistor, PX ... Pixel electrode, CT ... Counter electrode, CL ... Counter voltage signal line, SL
… Sealing material.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhiko Yanagawa             Hitachi, Ltd. 3300 Hayano, Mobara-shi, Chiba             Factory Display Group F-term (reference) 2H089 LA44 MA03Y QA16 RA03                       TA02                 2H092 GA14 GA21 GA26 GA27 GA32                       GA58 HA04 HA06 HA12 JB69                       JB74 PA04 QA06

Claims (5)

[Claims] 1. A switching element that is operated by a scanning signal from a gate signal line and a switching element in each pixel region on the liquid crystal side surface of one of the substrates that face each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal is supplied from the drain signal line via the pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode covers the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating and is connected to an annular bus line surrounding the periphery of the aggregate of the pixel regions, and the bus line also serves as an encapsulation of the liquid crystal and is formed between the one substrate and the other substrate. A liquid crystal display device, characterized in that the liquid crystal display device is formed in a region surrounded by a sealing material for fixing. 2. A switching element operated by a scanning signal from a gate signal line and a switching element in each pixel region on a liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal is supplied from the drain signal line via the pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode covers the switching element and the pixel electrode. Is formed on the upper surface of an insulating coating made of an organic material layer and is integrally connected to a bus line made of the same material as the annular counter electrode surrounding the periphery of the aggregate of the pixel regions, the bus line being the liquid crystal. A liquid crystal display device, wherein the liquid crystal display device is formed in a region surrounded by a sealing material for fixing one substrate and the other substrate while also encapsulating. 3. A switching element which is operated by a scanning signal from a gate signal line, and the switching element are provided in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other through the liquid crystal. A pixel electrode to which a video signal is supplied from the drain signal line via the pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode covers the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating and is connected to an annular bus line surrounding the periphery of the aggregate of the pixel regions, and the bus line also serves as an encapsulation of the liquid crystal and is formed between the one substrate and the other substrate. A liquid crystal display device, characterized in that the liquid crystal display device is formed in a region surrounded by a sealing material for fixing, and the entire region is covered with an alignment film. 4. A switching element operated by a scanning signal from a gate signal line and a switching element in each pixel region on a liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode supplied with a video signal from the drain signal line via the pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode covers the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating and is connected to an annular bus line surrounding the periphery of the aggregate of the pixel regions, and the bus line also serves as an encapsulation of the liquid crystal and is formed between the one substrate and the other substrate. It is formed in a region surrounded by a sealing material for fixing, and is formed so as to extend outside a black matrix formed on the liquid crystal side surface of the other substrate. Crystal display device. 5. A switching element operated by a scanning signal from a gate signal line and a switching element in each pixel region on the liquid crystal side surface of one of the substrates opposed to each other with a liquid crystal interposed therebetween. A pixel electrode to which a video signal is supplied from the drain signal line via the pixel electrode and a counter electrode for generating an electric field between the pixel electrode and the pixel electrode are formed, and the counter electrode covers the switching element and the pixel electrode. Is formed on the upper surface of the insulating coating and is connected to an annular bus line surrounding the periphery of the aggregate of the pixel regions, and the bus line also serves as an encapsulation of the liquid crystal and is formed between the one substrate and the other substrate. A liquid crystal display device, characterized in that it is formed in a region surrounded by a sealing material to be fixed and holes are formed along the longitudinal direction thereof.