JPH06208135A - Liquid crytal display device - Google Patents

Abstract

PURPOSE:To provide a liquid crystal display device having a high quality of display, in which the trouble such as disclination of a liquid crystal layer and a defect of inter-layer short circuit and the lowering of numerical aperture is eliminated. CONSTITUTION:A first shading film 129, which is made of the insulating material having 3-10% of transmittance of the visible light and which is arranged on a TFT element array substrate 107 so as to cover a non-picture-element part between picture element electrodes 105, and a second shading film 131, which is made of the material having 3-10% of transmittance of the visible light and which is arranged on a opposite substrate 113 so as to be nearly overlapped with the first shading film 129 from a plan view, are used together to realize the shading property at 2-3 of optical density even in the case where film thickness of each shading film is thin, for example, about 1mum, and the problem such as disclination of a liquid crystal layer and a defect of layer short circuit and the lowering of numerical aperture is eliminated to provide a liquid crystal display device having a high quality of display.

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.

[0002]

2. Description of the Related Art Liquid crystal display devices have been widely used as display devices for televisions, graphic displays and the like, taking advantage of their features such as thinness and low power consumption.

Among them, thin film transistors (TFTs) using polycrystalline silicon, amorphous silicon, or the like.
r; hereinafter abbreviated as TFT) or a metal such as aluminum oxide sandwiched between electrodes formed of a metal thin film
An active matrix type liquid crystal display device using a non-linear element having a non-linear electric resistance such as an M (Metal-Insulator-Metal) element as a switching element is excellent in high-speed response and suitable for high definition display screen. It is attracting attention as a device that realizes high image quality, large size, and color image formation.

As shown in FIGS. 4 and 5, the display element portion of such an active matrix type liquid crystal display device is normally connected to a TFT 403 as a switching active element such as a TFT on a glass substrate 401. Of the active element array substrate 407 on which the pixel electrodes 405 are arranged, and the counter electrode 409 arranged to face the active element array substrate 407 are formed on the glass substrate 411.
3, the liquid crystal layer 415 sandwiched between the substrates 407 and 413, the polarizing plates 417 and 419 attached to the outer surface side of each substrate, and the active element array substrate 407 so as to be orthogonal to each other. The TFT4 provided above
The signal line 421 and the scanning line 423 connected to the signal line 03 make up the main part thereof. Further, in recent years, in order to display the screen in color, R (red) is provided on the counter substrate 411 side.
Color filters 425 having color cells corresponding to the three primary colors of light such as G (green) and B (blue) are often used. Alignment films 427 and 429 are formed so as to cover them.

In the case of an ordinary liquid crystal display device used as a transmissive type, the pixel electrode 405 is formed of a transparent conductive film such as ITO, and the pixel electrode 405, the counter electrode 409 facing the pixel electrode 405, and the counter electrode 409 facing the pixel electrode 405. A pixel is formed with the sandwiched liquid crystal layer 415, and only a portion of this pixel performs a display operation, and a portion other than that, for example, a so-called non-pixel portion such as a portion between pixels, is hardly operating at all. It is in a state.

Since non-modulated light is always transmitted through a non-pixel portion such as a gap between pixels as described above, light is always leaked for display on a screen. Since the background of the image always shows a gradation state to some extent, there is a problem that the contrast of the displayed image is significantly reduced.

Therefore, as a measure for preventing such steady leakage of unmodulated light, rubbing treatment is performed so that the angles formed by the rubbing directions of the alignment films 427 and 429 of the two opposing substrates are orthogonal to each other. The polarizing plates 417 and 419 are arranged so that the polarization axes thereof are parallel to each other so that light not modulated by the liquid crystal layer 415 is not transmitted and an operating voltage is applied to the liquid crystal layer 415. There is already known a technique of transmitting light only when light is emitted. According to this technique, non-modulated light is not transmitted in principle.

However, in reality, the transmission of non-modulated light is determined by the accuracy of the alignment of the polarization axes of the two polarizing plates 417 and 419. The polarization axes must be aligned exactly parallel to each other. Even if the polarization axis shift angle is set to 1 degree as a practical alignment accuracy, it is difficult to achieve such alignment accuracy during mass production of liquid crystal display panels.

On the other hand, a rubbing process is performed so that the angles formed by the rubbing directions of the alignment films 427 and 429 of the two opposing substrates are orthogonal to each other to form a TN type liquid crystal cell and the polarizing plates 417 and 419. There is already known a technique of arranging polarization axes so as to be orthogonal to each other and transmitting light only when an operating voltage is applied to the liquid crystal layer 415. According to this technique, the polarizing plates 417, 4
Although the deviation of the polarization axis of 19 causes a slight variation in the light transmittance, it is hardly noticeable in terms of luminosity, has little influence on the contrast of the image, and can be said to have high mass productivity.
However, also in this case, since only the light transmittance of the liquid crystal layer 415 in the pixel portion is variable, in the case of a bright display image, a non-pixel portion such as a gap between pixels is inconspicuous, but in the case of dark display. However, there is a problem in that only the pixel portion becomes dark and the non-pixel portion is left bright and the image becomes unsightly.

Therefore, as a solution to such a problem, a black matrix formed of a metal film having a high light-shielding property such as Cr for blocking transmitted light in a non-pixel portion such as a gap between pixels is used. The technique of forming a so-called light-shielding film on the counter substrate side is already known and has been put into practical use. Such a light-shielding film has an optical density of 2 to
The visible light transmittance of the light-shielding film in this case is required to be about 1 to 0.1%.

[0011]

However, in the liquid crystal display device using the above-mentioned light-shielding film on the counter substrate side, the pixel electrodes provided on the active element array substrate and the pixel electrodes provided on the counter substrate are provided. There is a problem in that the light shielding film and the light shielding film must be aligned with accurate accuracy, and such alignment is not easy. That is, in a normal multi-digit display liquid crystal display device, the pixel pitch is often designed to be several 100 μm, but for example, in the case of a 200 μm pitch, in order to obtain a sufficient pixel aperture ratio for good display, The alignment accuracy must be about several μm. However, it is not easy because dimensional errors due to thermal expansion of the glass substrate are involved.

Further, in consideration of the above alignment error and the blocking of the incident light on the liquid crystal display panel from an oblique direction, it is necessary to secure a margin of about 10% for the area of the light blocking film. The value when the area of the electrode is expressed by the aperture ratio is 50% to 60%, whereas the final aperture ratio of the pixel is lowered to 40% to 50%.
This leads to a decrease in the brightness of the displayed image.

Therefore, a technique of disposing the light shielding film on the active element array substrate side is disclosed in, for example, Japanese Patent Laid-Open No. 61-209065.
It is proposed by Japanese Patent Publication No. Such a light-shielding film is made of, for example, a light-shielding film formed of a metal having a high light-shielding property such as Cr, and an organic material such as a photosensitive polymer disclosed in JP-A-61-209065. It can be roughly classified into a black matrix or a light-shielding film formed by dispersing two colors of dyes or pigments having a color tone close to or similar to that of the base material. According to the technique of disposing such a light-shielding film on the active element array substrate side, it is possible to solve the above-mentioned problem of alignment difficulty and the problem of reduction in aperture ratio.

However, when the light-shielding film made of metal is used, there is an advantage that a high light-shielding property can be obtained even if the film thickness is thin, but since the light-shielding film has conductivity, the active element array is used. It is necessary to prevent short circuits with signal lines, scanning lines, pixel electrodes, etc. formed on the substrate, and an interlayer insulating film must be newly formed, which complicates the structure and the manufacturing process. There's a problem. Even if such an interlayer insulating film is formed,
When the interlayer insulating film has, for example, a pinhole defect, there is a problem that a short circuit defect occurs at that portion.

Further, since a metal such as Cr has a high reflectance of light on the surface, there is a problem that the room lighting is reflected on the screen and the display is hard to see.

On the other hand, in the case of a light-shielding film formed by dispersing dyes or pigments of two colors having a black color or a color tone close to that or a complementary color relationship to a base material made of an organic material such as a photosensitive polymer, Since the base material is formed of an insulating material such as an organic material, there is an advantage that short circuit failure can be avoided and the manufacturing can be performed by a relatively simple photolithography process. .

However, in order to obtain the required light-shielding effect with an optical density of about 2 to 3, the film thickness must be increased to about 1.5 to 2 μm. Further, for example, carbon black, which is preferably used as a black pigment, has a certain degree of conductivity, so that if the pigment having such a conductivity is mixed in at a high concentration, the insulation property of the light-shielding film becomes low. Therefore, the pigment can be mixed only up to a certain concentration, so that the film thickness must be further increased to obtain the required optical density.

Therefore, there is a problem that disclination of liquid crystal occurs near the step portion at the end of the light shielding film. Further, when the alignment film is formed on the thick light-shielding film as described above, there is a problem that the alignment film formed at the step portion at the end of the thick film may have a disconnection failure.

Further, when the photosensitive polymer is exposed in the photolithography process, it becomes difficult for the light of the exposure pattern to sufficiently reach the deep portion in the thickness direction, and in the case of the pigment dispersion type, the light is exposed in the base material. Since there is a pigment that blocks light, it becomes more difficult for light to reach a deep portion in the thickness direction, and there is a problem that patterning defects such as pattern chipping and peeling occur.

Further, in recent years, color filters have been actively arranged on a counter substrate for color display, and a technique of forming black by superimposing three primary colors of these color filters to form a light-shielding film. However, even in this case, there is a problem that the above alignment is not easy, and in principle, if three primary colors are overlapped, black should be formed. There is a problem that colors other than the above are formed and the background of the display is colored, and the displayed image becomes unsightly. In addition, since three layers corresponding to each of the three colors are stacked, the film thickness at that portion becomes large, and if the alignment film is formed at a thick step portion, there is a problem that a disconnection failure occurs.

The present invention has been made to solve such a problem, and its purpose is to solve the problems of display quality such as disclination of liquid crystal layers, short-circuit between layers and reduction of aperture ratio. An object is to provide a high liquid crystal display device.

[0022]

In order to solve the above problems, a liquid crystal display device according to the present invention has a plurality of scanning wirings and a plurality of signal wirings formed so as to intersect with each other on a substrate, the scanning wirings, and the scanning wirings. A switching element array substrate having switching elements formed at each intersection of signal wirings and connected to the scanning wirings and the signal wirings, and a plurality of pixel electrodes connected to the switching elements, and the switching element array substrate In a liquid crystal display device including a counter substrate having a counter electrode formed to face each other with a gap therebetween, and a liquid crystal composition sealed between the switching element array substrate and the counter substrate, Transmittance 3
A first light-shielding film formed of an insulating material of 10% to 10% and disposed on the switching element array substrate so as to cover the plurality of pixel electrodes, and a transmittance of visible light of 3 to 10 % Of an insulating material, and a second light-shielding film which is disposed on the counter substrate so as to substantially overlap the first light-shielding film in plan view.

Further, in the liquid crystal display device of the present invention, in the above structure, the first light-shielding film is formed of a film of silicon or germanium, and the second light-shielding film is transmitted light of the first light-shielding film. It may be formed as a blue filter or a green filter as a color filter that substantially absorbs the coloring of the above, or a film in which they are laminated.

In the liquid crystal display device of the present invention,
A semiconductor element such as a TFT element may be used as the switching element, or a non-linear resistance element such as an MIM element may be used.

The thickness of the first light-shielding film and the second light-shielding film is 1.5 in order to avoid the occurrence of alignment defects such as disclinations and patterning defects.
It is desirable that the thickness is less than or equal to μm, and more preferably less than or equal to 1 μm.

Further, such a first light shielding film and a second
As the material of the light-shielding film, the film of silicon or germanium as described above, or other materials such as those having a visible light transmittance of 3
1.0 μm made from a material with good insulating properties up to 10%
A photosensitive black resist having the following film thickness may be used.

[0027]

According to the present invention, since the first light-shielding film is formed on the switching element array substrate, the switching element array substrate and the counter substrate can be easily aligned with each other. Further, as a result, it is not necessary to take an overlap (a light-shielding margin) of the light-shielding film on the pixel electrode in consideration of the alignment error and the oblique incident light, so that the aperture ratio of the pixel electrode corresponding to the light-shielding margin can be improved.

Further, since the first light-shielding film and the second light-shielding film are formed of a high resistance material (insulating material) such as a semiconductor such as silicon or germanium or a photosensitive polymer, Even if there are pinhole defects in the interlayer insulating film, it is possible to avoid the occurrence of interlayer short-circuit defects.

A first light-shielding film is formed on the switching element array substrate, and a second light-shielding film is also formed on the counter substrate so as to substantially overlap the first light-shielding film in plan view. Since two light-shielding films are used together to shield light,
Even if the thickness of each sheet is reduced to 1 μm or less, the optical density of the emitted light with respect to the incident light on the liquid crystal display panel can be 2 to 3. The visible light transmittance of each is 3
Since it is set to 10% to 10%, the visible light transmittance of the two light shielding films is about 0.1% to 1%. Such visible light transmittance corresponds to optical densities 2 to 3 in terms of optical density. Since the film thickness of each light-shielding film can be made thin while achieving sufficient optical density in this way, the occurrence of disclination at the edge of the light-shielding film, the occurrence of patterning defects in the light-shielding film itself, It is possible to avoid the occurrence of defective disconnection of the alignment film formed on the film. At this time, even if the positions of the first light-shielding film and the second light-shielding film deviate by the same error as in the liquid crystal display device of the related art, all the light-shielding films have visible light transmittances of 3 to 3.
Since it is set to 10% or less, the variation in brightness with the overlapping part of the shifted part is at most about 1/10, and even with only one light-shielding film, the transmitted light of the shifted part is almost visible. You can block light to the extent that it does not matter. This is based on the property that the visibility of the human eye with respect to the light stimulus increases only in proportion to the logarithm of the light amount.

Further, when the first light-shielding film is formed of a silicon or germanium film as a semiconductor on the switching element array substrate, such a semiconductor film has a good insulating property and has a light-shielding property even if the film thickness is thin. It is more effective because it is high and does not conspicuously reflect light like a metal film such as Cr or Al. However, the light-shielding film formed of such a silicon or germanium film has a slightly high transmittance of red light, and the light passing through it is colored red among the three primary colors, and the light-shielding film portion on the screen is There is an inconvenience that it looks a little red. Therefore,
For example, when using a color filter on the counter substrate side,
The second light-shielding film is formed by a blue filter or a green filter which is a complementary color of red or a color filter in which these are overlapped, and the transmitted light colored red by the first light-shielding film is almost absorbed by the second light-shielding film. do it. At this time, the film thickness when the blue filter film and the green filter film are overlapped can be set to about 1.5 μm without much difficulty. At this time, it goes without saying that the visible light transmittance of the second light-shielding film formed by the color filter is set to 3 to 10% as in the case of the first light-shielding film.

[0031]

Embodiments of the liquid crystal display device of the present invention will be described in detail below with reference to the drawings.

Example 1 FIG. 1 is a plan view showing the structure of a liquid crystal display device of the present invention, and FIG. 2 is a sectional view thereof. TFT1 as a switching element on the glass substrate 101
03 and a pixel electrode 105 connected thereto, a TFT element array substrate 107, a counter substrate 113 on which a counter electrode 109 arranged to face the TFT element array substrate 107 is formed on a glass substrate 111, and these. The liquid crystal layer 115 sandwiched between the substrates 107 and 113, the polarizing plates 117 and 119 attached to the outer surface side of each substrate, and the TFT element array substrate 107 are disposed so as to be orthogonal to each other. Signal line 121 and scanning line 1 connected to the TFT 103 of
23 and 23 form the main part. Further, in recent years, in order to display a screen in color, a color filter 125 having color cells corresponding to the three primary colors of light such as R (red), G (green), and B (blue) is provided on the counter substrate 111 side. Has been formed.

In the case of a normal liquid crystal display device used as a transmissive type, the pixel electrode 105 is formed of a transparent conductive film such as ITO, and the pixel electrode 105, the counter electrode 109 facing the pixel electrode 105, and the counter electrode 109 facing the pixel electrode 105. A pixel 127 is formed with the sandwiched liquid crystal layer 115.
The display operation is performed only in the portion of, and the portion outside thereof, for example, the portion between adjacent pixels 127 is in a state in which almost no operation is performed. Then, a first light-shielding film 129 and a second light-shielding film 129 formed by patterning a photosensitive polymer having a black dye or pigment by photolithography so as to avoid such pixels so as to cover such a portion.
The light shielding film 131 is formed. Further, the interlayer insulating film 133 having a film thickness of 0.2 to 0.6 μm and formed of a SiO _x (silicon oxide) film or a SiN _x (silicon nitride) film is used as the signal line 121.
Is formed so as to cover. Alignment films 135 and 137 are formed so as to cover almost the entire surfaces of the TFT element array substrate 107 and the counter substrate 113, respectively.

In this embodiment, the first light-shielding film 129 and the second light-shielding film 131 are formed by dispersing a dye or a pigment in a photosensitive polymer having a high resistance and have a film thickness of 1 μm.
The visible light transmittance was set to about 10 to 3% in consideration of the fact that the patterning of the film can be performed without any trouble. The optical density was about 2.5. Further, the electric resistance values of the first light-shielding film 129 and the second light-shielding film 131 at this time were 10 ¹³ to 10 ¹⁴ Ωcm or more, and the insulating properties were good.

In this way, the TFT element array substrate 107
Since the first light shielding film 129 is formed on the TFT,
The element array substrate 107 and the counter substrate 113 can be easily aligned with each other. Further, as a result, it is not necessary to take an overlap (a light-shielding margin) of the first light-shielding film 129 with the pixel electrode 105 in consideration of the alignment error and the oblique incident light. Can be improved.

Further, since the first light-shielding film 129 and the second light-shielding film 131 are made of a high-resistivity photosensitive polymer, even if the interlayer insulating film 133 has a pinhole defect, a signal is generated. It is possible to avoid the occurrence of an interlayer short-circuit defect with the line 121 or the like.

Further, the first light shielding film 129 is formed on the TFT element array substrate 107, and the first light shielding film 129 is also formed on the counter substrate 113.
The second light-shielding film 131 is formed so as to substantially overlap the light-shielding film 129 of No. 2 in plan view and light is shielded by using these two light-shielding films together.
Even if the thickness is reduced to less than or equal to μm, more preferably less than or equal to 1 μm, it is possible to obtain optical densities 2 to 3 of emitted light with respect to incident light on the liquid crystal display panel. Each of the first light-shielding film 129 and the second light-shielding film 131 has a visible light transmittance of 3 to 10.
Since it is set to the value of%, the visible light transmittance obtained by combining these two light shielding films is about 0.1% to 1%. Since the thickness of each of the light shielding films 129 and 131 can be reduced while achieving a sufficient optical density as described above, the occurrence of disclination at the end portions of the light shielding films 129 and 131 and the light shielding films 129 and 131 themselves. It is possible to avoid the occurrence of defective patterning, the defective disconnection of the alignment films 135 and 137 formed on the light shielding films 129 and 131, and the like.

Further, even if the positions of the first light-shielding film 129 and the second light-shielding film 131 are deviated by the same error as in the conventional liquid crystal display device, both of the light-shielding films 129, 13 are formed.
1 also has a visible light transmittance of 3 to 10% or less, the difference in brightness between the shifted portions and the overlapped portions is about 1/10 at maximum in this embodiment. Even the light-shielding film alone can block the transmitted light in the shifted portion to such an extent that it causes almost no problem visually. Actually, the appearance of the shift on the display screen was visually inspected, but almost no variation in the brightness of the light-shielding film portion due to the shift could be identified.

Then, a driving circuit or the like was incorporated into the liquid crystal display device of the first embodiment as described above, the liquid crystal display device was actually driven, and the image quality of the display image was evaluated. As a result, it was confirmed that no display defect due to disclination or short circuit defect was found, and bright and high-contrast display could be realized.

(Embodiment 2) FIG. 3 is a sectional view showing the structure of a liquid crystal display device according to a second embodiment of the present invention. For simplification of description, the same parts as those in the first embodiment are designated by the same reference numerals.

In the liquid crystal display device of the second embodiment, instead of the first light-shielding film 129 and the second light-shielding film 131 formed of the photosensitive polymer in the first embodiment, an insulating material is used. This is different from the first embodiment in that a first light-shielding film 329 formed of a high silicon or germanium film and a second light-shielding film 331 formed by overlapping color cells of a color filter are used. . That is, instead of the first light-shielding film 129, the first light-shielding film 329 is formed of a silicon or germanium film, and instead of the second light-shielding film 131, the second light-shielding film 331 is used as the first light-shielding film 331. Light-shielding film 12
It is characterized in that it is formed as a blue filter 333 or a green filter 335 that substantially absorbs the coloring (red) of the light that has passed through 9, or as a color filter obtained by overlapping them.

First light-shielding film 329 and second light-shielding film 3
No. 31 has a film thickness of 0.2 to 0.6 μm, a visible light transmittance of 10% or less, a 600 nm wavelength light of 5% or less, and an electric resistance value of 10 ⁸ Ωcm or more. It is supposed to have high quality.

When the first light-shielding film 129 is formed of a silicon or germanium film on the TFT element array substrate 107 as described above, such a film has a good insulating property and a high light-shielding property even if the film thickness is thin. In addition, since it has a characteristic that it does not reflect light conspicuously like a metal film such as Cr or Al, it is more effective than the case of the first embodiment.

However, the light-shielding films 329 and 331 made of such a silicon or germanium film have a slightly high transmittance of red light, and the transmitted light is colored red among the three primary colors, and on the screen. There is an inconvenience that the portions of the light shielding films 329 and 331 are colored red. Therefore, for example, when the color filter 125 is used on the side of the counter substrate 113, the second light-shielding film 331 is used as a blue filter 33 that is a complementary color of red among the three primary colors of the color filter 125.
3 or the adjacent color including the green filter 335 is formed in an overlapping manner, and the transmitted light colored in red by the first light-shielding film 329 may be absorbed by the second light-shielding film 331 so that the coloring is eliminated. . At this time, the total film thickness when the film of the blue filter 333 and the film of the green filter 335 are superposed can be set to 1.5 μm or less without much difficulty. Also, the second
Since the light shielding film 331 can be formed by using the blue filter 333 and the green filter 335 of the color filter 125, there is also an advantage that it can be formed by a simple manufacturing process.

A driving circuit or the like was incorporated into the liquid crystal display device of the second embodiment, and the liquid crystal display device was actually driven, and the image quality of the display image was evaluated. As a result, it was confirmed that no display defect due to disclination or short circuit defect was found, and bright and high-contrast display could be realized.

Although the TFT 103 is used as the switching element in the above embodiment, the present invention is not limited to this. Other than this, for example, a non-linear resistance element such as an MIM element may be used.

Further, the above-mentioned first light shielding films 129, 329.
The film thickness of the second light shielding films 131 and 331 is preferably 1.5 μm or less, more preferably 1 μm or less in order to avoid the occurrence of alignment defects such as disclinations and the occurrence of patterning defects.

The material of the second light-shielding film 331 in the second embodiment is silicon (Si) or G as described above.
In addition to e (germanium), an opaque material having good insulating properties in which oxygen or nitrogen is added can be suitably used.

In addition, it goes without saying that various changes can be made to the material forming each part of the liquid crystal display device of the present invention without departing from the scope of the present invention.

[0050]

As clearly described in the above detailed description, according to the present invention, a liquid crystal display device having a high display quality which solves the problems such as the disclination of the liquid crystal layer, the interlayer short-circuit defect, and the reduction of the aperture ratio is obtained. Can be provided.

[Brief description of drawings]

FIG. 1 is a plan view showing the structure of a liquid crystal display device according to a first embodiment.

FIG. 2 is a cross-sectional view showing the structure of the liquid crystal display device of the first embodiment.

FIG. 3 is a cross-sectional view showing the structure of a liquid crystal display device according to a second embodiment.

FIG. 4 is a plan view showing the structure of a conventional liquid crystal display device.

FIG. 5 is a cross-sectional view showing the structure of a conventional liquid crystal display device.

[Explanation of symbols]

101, 111 ... Glass substrate, 103 ... TFT, 105
... Pixel electrode, 107 ... TFT element array substrate, 109 ...
Counter electrode, 113 ... Counter substrate, 115 ... Liquid crystal layer, 11
7, 119 ... Polarizing plate, 121 ... Signal line, 123 ... Scan line, 125 ... Color filter, 127 ... Pixel, 129 ...
First light-shielding film, 131 ... Second light-shielding film, 133 ... Inter-layer insulating film, 135, 137 ... Alignment film

[Procedure amendment]

[Submission date] May 19, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

However, in the liquid crystal display device using the above-mentioned light-shielding film on the counter substrate side, the pixel electrodes provided on the active element array substrate and the pixel electrodes provided on the counter substrate are provided. There is a problem in that the light shielding film and the light shielding film must be aligned with accurate accuracy, and such alignment is not easy. That is, normal O
In many cases , the liquid crystal display device for A is designed to have a pixel pitch of about 300 μm . For example, in the case of a 200 μm pitch, in order to obtain a sufficient aperture ratio of pixels for good display, the alignment accuracy is set to several μm. It should be about degree. However, it is not easy because dimensional errors due to thermal expansion of the glass substrate are involved.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

However, in order to obtain the required light-shielding effect with an optical density of about 2 to 3, the film thickness is 1.5.
It must be thickened to about 3 μm. Further, for example, carbon black, which is preferably used as a black pigment, has a certain degree of conductivity, so that if the pigment having such a conductivity is mixed in at a high concentration, the insulation property of the light-shielding film becomes low. Therefore, the pigment can be mixed only up to a certain concentration, so that the film thickness must be further increased to obtain the required optical density.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

[0022]

In order to solve the above problems, a liquid crystal display device according to the present invention has a plurality of scanning wirings and a plurality of signal wirings formed so as to intersect with each other on a substrate, the scanning wirings, and the scanning wirings. A switching element array substrate having switching elements formed at each intersection of signal wirings and connected to the scanning wirings and the signal wirings, and a plurality of pixel electrodes connected to the switching elements, and the switching element array substrate In a liquid crystal display device including a counter substrate having a counter electrode formed to face each other with a gap therebetween, and a liquid crystal composition sealed between the switching element array substrate and the counter substrate, Transmittance is 3
A first light-shielding film formed of an insulating material of 10% to 10% and disposed on the switching element array substrate so as to cover the openings of the plurality of pixel electrodes, and a visible light transmittance of 3 to 10 % of formed from wood fee, it is characterized by comprising a second light shielding film in plan view in the first light-shielding film disposed on the opposing substrate so as substantially overlap.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

In this embodiment, the first light-shielding film 129 and the second light-shielding film 131 are formed by dispersing a dye or a pigment in a photosensitive polymer having a high resistance, and have a film thickness of 1 μm.
The visible light transmittance was set to about 10 to 3% in consideration of the fact that the patterning of the film can be performed without any trouble. The optical density was about 2.5. Further, the electric resistance values of the first light-shielding film 129 and the second light-shielding film 131 at this time were 10 ¹³ to 10 ¹⁴ Ωcm or more, and the insulating properties were favorable. However, the second light shielding film 131 is
For example, increase the carbon concentration to reduce the film thickness and increase the conductivity.
However, there is no functional problem .

Claims (2)

[Claims] 1. A plurality of scanning wirings and a plurality of signal wirings formed so as to intersect with each other on a substrate, and each scanning wiring and a crossing portion of the signal wirings formed at each intersection and connected to the scanning wirings and the signal wirings. A switching element array substrate on which a switching element and a plurality of pixel electrodes connected to the switching element are formed; and a counter substrate on which a counter electrode is formed facing the switching element array substrate with a gap therebetween. A liquid crystal display device having a liquid crystal composition enclosed between the switching element array substrate and the counter substrate, wherein the plurality of pixel electrodes are formed of an insulating material having a visible light transmittance of 3 to 10%. A first light-shielding film disposed on the switching element array substrate so as to cover the space between them, and an insulating material having a visible light transmittance of 3 to 10%. Is, liquid crystal display device characterized by comprising a second light shielding film above the plane in the first light-shielding film disposed on the opposing substrate so as substantially overlap. 2. The liquid crystal display device according to claim 1, wherein the first light-shielding film is formed of a silicon or germanium film, and the second light-shielding film is colored by the transmitted light of the first light-shielding film. A liquid crystal display device, which is formed by using at least one of a blue filter and a green filter as a color filter that substantially absorbs.