JPH08262455A - Liquid crystal display panel and its production - Google Patents

Abstract

PURPOSE: To provide a liq. crystal display panel without a bubble being formed in a liq. crystal substance when allowed to stand at low temps., without nonuniform frame gaps being generated around a sealing material and enhanced in display grade. CONSTITUTION: A first substrate 1 has an elastic film 11, a first transparent electrode 3 on the elastic film and a first oriented film 5, and a second substrate 2 has a second transparent electrode 4 and a second oriented film 6. Further, a sealing material 9 is provided on the peripheral part between the first substrate and second substrate, an internal spacer 8 is formed between the first substrate and second substrate, and a liq. crystal substance 7 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a liquid crystal display panel and a method for manufacturing the same, and more specifically, to improve the uniformity of the distance between two substrates (hereinafter referred to as a cell gap) constituting the liquid crystal display panel. The present invention relates to a substrate structure and an inner spacer for making the structure. The liquid crystal display panel has a monochrome display, a color display, an active display, a passive display, a TN display, an STN display, a ferroelectric display, an antiferroelectric display, a transmissive display and a reflective display. Although the structure may be different due to the difference in the type display and other display modes, the present invention can be applied to any display mode. The following explanation is STN type display,
Passive display, monochrome display, and color liquid crystal display panel will be described as representatives.

[0002]

2. Description of the Related Art In a liquid crystal display panel, basically, two substrates on which a plurality of transparent electrodes are formed are made to face each other with the surfaces on which the transparent electrodes are formed facing each other and sealed by a sealing material. A liquid crystal substance is injected between them to form the structure.

Although the cell gap size of the liquid crystal display panel varies depending on the display mode, an accuracy of about ± 0.05 μm is required for STN type display. In order to obtain this cell gap precision, an internal spacer is provided on the entire surface of the display screen, but the satisfactory precision is not obtained.

If the cell gap accuracy is insufficient,
When the liquid crystal display panel is turned on, unevenness in the density of the display screen occurs, resulting in a liquid crystal display panel with poor display quality. With the recent improvement in the contrast characteristics of liquid crystal display panels, the demand for improving the cell gap accuracy is increasing.

The structure of a conventional liquid crystal display panel will be described below with reference to the drawings. FIG. 6 is a sectional view showing the structure of a conventional STN type liquid crystal display panel.

As shown in FIG. 6, the first substrate 1 has a first
Transparent electrode 3 is provided on the first transparent electrode 3
The alignment film 5 is provided. On the other hand, the second transparent electrode 4 is also provided on the second substrate 2, and the second alignment film 6 is provided on the second transparent electrode 4.

A sealing material 9 made of a thermosetting adhesive is provided around the first substrate 1 and the second substrate 2.
Then, the liquid crystal substance 7 is injected between the first substrate 1 and the second substrate 2.

In order to keep the cell gap of this liquid crystal display panel uniform, an inner spacer 8 is provided over the entire display screen in the inner region of the sealing material 9, and further the sealing material 9 is provided.
The spacer 10 in the seal is mixed in the inside of the.

As the in-seal spacer 10, silica beads or glass fiber having high hardness are generally used. As the inner spacers 8, elastic plastic beads are dispersed at a density of about 200 beads / mm ² .

It is also conceivable to use silica beads or glass fibers having high hardness as the inner spacer 8. However, when the liquid crystal display panel using the inner spacer 8 having high hardness such as silica beads or glass fiber is left in a low temperature state, for example, -40 ° C, bubbles are generated in the liquid crystal substance 7 to cause a liquid crystal display device. Cannot be used as a liquid crystal display panel.

The cause of the generation of bubbles in the liquid crystal substance 7 is considered as follows. In order to keep the cell gap of the liquid crystal display panel uniform, after injecting the liquid crystal substance 7, the entire surface of the liquid crystal display panel is pressed to push out excess liquid crystal substance from the injection port, and then the injection port is sealed and pressurized. The inside of the liquid crystal display panel is kept under reduced pressure.

When the liquid crystal display panel in the depressurized state is left in a low temperature atmosphere, the liquid crystal substance 7 contracts. When the inner spacer 8 having high hardness is arranged on the entire display screen in the liquid crystal display panel, the cell gap cannot be changed. For this reason, the inside of the liquid crystal display panel is depressurized to induce bubbles in the liquid crystal substance 7.

In order to prevent the generation of these low temperature bubbles by using silica beads or glass fibers having high hardness as the inner spacers 8, experimentally, the upper limit is a dispersion density of about 15 / mm ² inner spacers 8.

In the liquid crystal display panel shown in FIG. 6, an alignment film having a thickness of about 50 nm is provided on the first substrate 1 and the second substrate 2. The alignment film functions as a film having elasticity. Not not.

The distribution density of the inner spacers 8 is 15 pieces / m.
In the case of about m ² , it is considered that the generation of bubbles is prevented by the deformation of the substrate itself and the slight deformation of the inner spacer 8.

However, the dispersion density of the inner spacer 8 is 15
In a spraying state with a low density of about 1 / mm ^2, it is difficult for the current technology to make the cell gap size uniform over the entire display screen, and cell gap unevenness occurs over the entire display screen.

It is considered that even if, for example, three pieces of spraying unevenness per unit area, the spraying unevenness becomes 20% and the uniformity of the cell gap cannot be ensured.

On the other hand, in a liquid crystal display panel using plastic beads having elasticity as the inner spacer 8,
When the liquid crystal substance 7 contracts in a low temperature atmosphere, the plastic beads are deformed and the cell gap is thinned to prevent the generation of bubbles.

In order to prevent the generation of the low temperature bubbles, at present, there is no practical technique other than using plastic beads as the inner spacer 8.

However, the use of elastic plastic beads as the inner spacer 8 has other problems. That is, this is the occurrence of frame unevenness, which will be described in detail below, which is generated in the vicinity of the sealing material 9 and is called frame unevenness.

7 to 11 are drawings for explaining the frame gap unevenness of the liquid crystal display panel, FIG. 7 is a plan view showing the entire liquid crystal display panel, and FIG. 8 is a pressurization for curing the sealing material. 9 is a cross-sectional view showing a state during firing, and FIG. 9 is a cross-sectional view showing a state in which a liquid crystal substance is injected into the liquid crystal display panel of FIG. 8 and pressure-sealed. Here, FIGS. 8 and 9 show the case where the sealing material is hardened in a taper shape such that the sealing material becomes narrower toward the central portion of the display screen.

Further, FIG. 10 is a cross-sectional view showing a state during pressure baking for curing the sealing material, and FIG. 11 is a cross-sectional view showing a state in which a liquid crystal substance is injected into the liquid crystal display panel of FIG. 10 and pressure-sealed. FIG. 10 and FIG. 11 show the case where the sealing material is hardened in a taper shape such that it widens toward the central portion of the display screen.

As shown in FIG. 7, the frame gap unevenness 22 refers to a state in which the cell gap size in the vicinity of the sealing material 9 has a different cell gap size compared to the central portion 21 of the display screen.

Due to the occurrence of the frame gap unevenness 22, the required drive voltage in the region near the sealing material 9 is different from the required drive voltage in the central portion 21 of the display screen, and a difference in shading appears on the display screen of the liquid crystal display panel.

The frame cell gap irregularity 22 may be thick or thin in that region. If the cell gap size is thick, the required drive voltage is high, and conversely, if the cell gap size is thin, the required drive voltage is low.

In any case, since the required drive voltage differs between the display screen central portion 21 and the frame cell gap unevenness 22, a difference in shading occurs on the display screen of the liquid crystal display panel.

FIG. 8 is a sectional view showing a state of the liquid crystal display panel at the time of pressure baking for curing the sealing material 9. Here, the pressure baking means a treatment step of heating the first substrate 1 and the second substrate 2 while pressing them with a uniform force in order to cure the sealing material 9 to a uniform thickness.

The plastic beads used as the inner spacer 8 for pressing and heating are deformed as shown in FIG. 8 and the central portion 21 of the display screen becomes thin. According to the experiment confirmation by the inventor, when a pressure of 0.8 kg / cm ² and a temperature of 160 ° C. were applied to plastic beads having a diameter of 6 μm, the plastic beads became 4.5 μm thick.

On the other hand, since the in-seal spacer 10 is made of glass fiber having high hardness or silica beads having high hardness, the sealing region of the sealing material 9 is not deformed during pressure firing. Therefore, as shown in FIG. 8, the sealing material 9 hardens in a tapered shape that narrows toward the central portion 21 of the display screen.

FIG. 9 shows a state in which a liquid crystal substance 7 is injected into a liquid crystal display panel having a sealing material 9 which is hardened in a taper shape as shown in FIG. 8 and pressure sealing is performed in order to improve the cell gap uniformity. FIG.

The plastic beads, which are the inner spacers 8 largely deformed during the pressure firing shown in FIG. 8, return to the original shape of the sphere when the temperature returns to the normal temperature and pressure after the pressure firing.

After the subsequent injection of the liquid crystal substance 7, pressure is applied to the entire surface of the liquid crystal display panel to push out the excess liquid crystal substance 7 from the injection port, so that the plastic beads as the inner spacer 8 are not so much. Since it does not deform significantly, the central portion 21 of the display screen becomes thick.

However, the first substrate 1 and the second substrate 2 in the vicinity of the sealing material 9 are regulated by the sealing material 9 which is hardened into a taper shape, so that they are deformed to cause gap unevenness. This is considered to be the mechanism of occurrence of the frame gap unevenness 22.

10 and 11 show the spacer 1 in the seal.
By reducing the size of 0, the above-mentioned frame gap unevenness 22
10 is a cross-sectional view showing a pressure-fired state, and FIG. 11 is a cross-sectional view showing a state in which the liquid crystal substance is injected and pressure-sealed.

Contrary to the case of FIGS. 8 and 9, the sealing material 9 is hardened in such a state that the thickness thereof increases toward the central portion 21 of the display screen. However, in this case as well, since the sealing material 9 has a tapered shape, the first substrate 1 and the second substrate 2 in the vicinity of the sealing material 9 are regulated by the sealing material 9 and the frame gap unevenness 22 is generated. I will end up.

When the plastic beads having elasticity are used as the inner spacers 8 as described above, when the sealing material 9 of the current thermosetting adhesive is used, the frame gap unevenness 22 occurs near the sealing material 9. It is difficult to control.

It is considered that this is because the elastic plastic beads used as the inner spacer 8 are largely deformed in the pressure firing step as described above, and then return to the original shape when the temperature is returned to room temperature and normal pressure.

When the display screen is viewed, the liquid crystal display panel having the frame gap unevenness 22 changes in luminance of the peripheral frame gap unevenness 22 with respect to the central portion 21 of the display screen and becomes a liquid crystal display panel having poor display quality.

In order to suppress the occurrence of the frame gap unevenness 22 as much as possible, it is conceivable to spray a large amount of plastic beads of about 500 beads / mm ² as the inner spacer 8.

However, if too many inner spacers 8 are scattered in this way, the leakage of light from the inner spacers 8 causes a reduction in contrast, and this leakage of light is visible during black display, thus improving the display quality of the liquid crystal display panel. Lower.

This is because when transparent or milky white plastic beads are used as the inner spacer 8, light in the inner spacer 8 region is transmitted during black display and the lens effect makes the image look larger.

Not only when a large amount of the inner spacers 8 are scattered in this way, but also when the inner spacers 8 are currently used.
Even when the particles are sprayed at about 1 / mm ^2, the phenomenon of light leakage from the transparent or milky-white plastic beads has occurred, which causes a problem in display quality and demands improvement from users.

[0043]

As described above, in the liquid crystal display panel in which the plastic beads having elasticity are scattered as the inner spacer 8 at a density of about 200 / mm ² , it is possible to prevent the generation of low temperature bubbles. However, it is difficult to suppress the occurrence of the frame gap unevenness 22.

Further, there is an inherent problem that the display quality is deteriorated because the contrast is lowered due to the leaked light from the internal spacer 8 and the leaked light is visible during black display.

The object of the present invention is to prevent the above-mentioned generation of low-temperature bubbles, to reduce the occurrence of frame irregularities such as frame gap irregularities in the region near the sealing material, and further to reduce the leakage light from the internal spacers. To provide a structure of a liquid crystal display panel having high display quality and a manufacturing method for forming this structure.

[0046]

In order to achieve the above object, the structure of the liquid crystal display panel of the present invention and the manufacturing method for forming this structure employ the means described below.

In the liquid crystal display panel of the present invention, the first substrate has the elastic film, the first transparent electrode on the elastic film, and the first alignment film, and the second substrate is the second transparent electrode. And a second alignment film, and a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and an internal spacer provided between the first substrate and the second substrate. And a liquid crystal substance.

In the liquid crystal display panel of the present invention, the first substrate has the elastic film, the first transparent electrode on the elastic film, and the first alignment film, and the second substrate has the second transparent electrode. And a second alignment film, and a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and an internal spacer provided between the first substrate and the second substrate. And the liquid crystal material, and the dispersion density of the inner spacers is 100 pieces / mm ² to 400 pieces / mm ² .

In the liquid crystal display panel of the present invention, the first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and a second substrate. The substrate has a second transparent electrode and a second alignment film, and further has a sealing material provided in the peripheral portion between the first substrate and the second substrate;
And an inner spacer provided between the first substrate and the second substrate, and a liquid crystal material.

In the liquid crystal display panel of the present invention, the first substrate has a color filter layer, a flattening layer provided on the color filter layer, a first transparent electrode on the flattening layer, and a first alignment film. , The second substrate has a second transparent electrode and a second alignment film, and a sealing material provided in the peripheral portion between the first substrate and the second substrate, and the first substrate. An inner spacer provided between the second substrate and a liquid crystal material is provided, and the dispersion density of the inner spacer is 100 pieces / mm ² to 400 pieces / mm ^2.
It is characterized in that it is set to mm ² .

In the liquid crystal display panel of the present invention, the first substrate is a light-shielding film, a color filter layer provided on the light-shielding film, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first transparent electrode. A first alignment film, the second substrate has a second transparent electrode and a second alignment film, and a seal provided in the peripheral portion between the first substrate and the second substrate. A material, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal material, and the dispersion density of the internal spacer is 100.
It is characterized in that the number is 400 pieces / mm ² from 400 pieces / mm ² .

In the method for manufacturing a liquid crystal display panel of the present invention, the first substrate has the elastic film, the first transparent electrode on the elastic film, and the first alignment film, and the second substrate has the second film. A sealant having a transparent electrode and a second alignment film, further provided between the first substrate and the second substrate in the peripheral portion thereof, and provided between the first substrate and the second substrate. The method for spraying the inner spacer in the method for manufacturing a liquid crystal display panel including the inner spacer and the liquid crystal substance is to mix the inner spacer with a mixed solution of pure water and isopropyl alcohol, and stir the mixed solution to form the inner spacer on the substrate. Characterized by spraying.

In the method of manufacturing a liquid crystal display panel of the present invention, the first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film. The second substrate has a second transparent electrode and a second alignment film, and further has a first
In a method of manufacturing a liquid crystal display panel, comprising: a sealing material provided between the first substrate and the second substrate in a peripheral portion thereof; an internal spacer provided between the first substrate and the second substrate; and a liquid crystal substance. The spacer spraying method is characterized in that the internal spacers are mixed in a mixed solution of pure water and isopropyl alcohol, and the internal spacers are sprayed on the substrate while stirring the mixed solution.

In the method for manufacturing a liquid crystal display panel of the present invention, the first substrate is a color filter layer, a flattening layer provided on the color filter layer, a first transparent electrode on the flattening layer, and a first alignment film. And a second substrate having a second transparent electrode and a second alignment film, and a sealing material provided in the peripheral portion between the first substrate and the second substrate, The method of spraying the inner spacer in the method of manufacturing a liquid crystal display panel including the inner spacer provided between the first substrate and the second substrate and the liquid crystal substance is such that the inner spacer is mixed in a mixed liquid of pure water and isopropyl alcohol, An internal spacer is sprinkled on the substrate while stirring the mixed solution.

In the method of manufacturing a liquid crystal display panel according to the present invention, the first substrate is a light-shielding film, a color filter layer provided on the light-shielding film, a flattening layer provided on the color filter layer, and a first transparent film on the flattening layer. An electrode and a first alignment film, a second substrate having a second transparent electrode and a second alignment film, and a peripheral portion between the first substrate and the second substrate. The method of spraying the inner spacer in the method of manufacturing a liquid crystal display panel including the sealing material provided on the substrate, the inner spacer provided between the first substrate and the second substrate, and the liquid crystal substance is a mixture of pure water and isopropyl alcohol. Mix the internal spacer into
An internal spacer is sprinkled on the substrate while stirring the mixed solution.

[0056]

The means used by the present invention is to provide an elastic film having elasticity on one substrate or both substrates as a lower layer of the transparent electrode. Furthermore, 100 / mm ² to 40 inner spacers made of silica beads or glass fibers with high hardness are used.
Spray with a density of 0 pieces / mm ² .

The high hardness of silica beads and glass fibers used as the inner spacers means that
In the present specification, when the sealing material is pressure-fired, the first
This means that the substrate is not deformed in the step of pressurizing the substrate and the second substrate or the step of pushing out the excess liquid crystal substance from the injection port after injecting the liquid crystal substance.

As the inner spacer, transparent, milky white or black silica beads or glass fiber is used.

In the liquid crystal display panel using such means, even if the liquid crystal substance contracts at a low temperature, the elastic film provided on the substrate is deformed and the cell gap is thinned to prevent the generation of bubbles. be able to.

Since the inner spacer having higher hardness undergoes only a slight deformation during pressure baking at high temperature, the cross-sectional shape of the sealing material does not harden into a taper shape, and the occurrence of frame gap unevenness is suppressed. be able to.

Further, by using the black inner spacer, it is possible to prevent deterioration of contrast and display quality due to light leaked from the inner spacer.

Further, as a method of spraying the internal spacer in the manufacturing method of the present invention, a method of mixing the internal spacer in a mixed solution of pure water and isopropyl alcohol and spraying it on the substrate while stirring with a stirrer is adopted.

By mixing an internal spacer in this mixed solution of pure water and isopropyl alcohol and spraying with stirring, it is possible to spray with a uniform density on the substrate. Further, it is possible to suppress the occurrence of aggregation between the inner spacers. Further, it is possible to suppress the generation of stains on the substrate.

[0064]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a liquid crystal display panel in an embodiment of the present invention and a manufacturing method for forming this structure will be described below with reference to the drawings. It should be noted that the following drawings show only the structure, and do not show dimensions and the like. First, the structure of the liquid crystal display panel according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows the first embodiment of the present invention.
3 is a cross-sectional view showing a liquid crystal display panel in the example of FIG.

As shown in FIG. 1, the first transparent electrode 3 is provided on the first substrate 1, and the first alignment film 5 is provided on the first transparent electrode 3. On the other hand, the second substrate 2 also has a second
Transparent electrode 4 is provided on the second transparent electrode 4
The alignment film 6 is provided.

The periphery of the first substrate 1 and the second substrate 2 is sealed with a sealing material 9 made of a thermosetting adhesive.
Then, the liquid crystal substance 7 is injected between the first substrate 1 and the second substrate 2.

Further, in order to keep the cell gap of this liquid crystal display panel uniform, an inner spacer 8 is provided over the entire display screen in the inner region of the sealing material 9, and an in-seal spacer 10 is provided inside the sealing material 9. It is mixed.
As the inner spacer 8, transparent or milky white silica beads or glass fiber is used.

Furthermore, an elastic film 11 is provided on the entire surface between the first substrate 1 and the first transparent electrode 3. This elastic film 11
Is made of a transparent resin material.

Next, a manufacturing method for forming the liquid crystal display panel structure shown in FIG. 1 will be described with reference to FIG.
First, a method of manufacturing the first substrate 1 will be described.

The elastic film 11 is formed on the entire surface of the first substrate 1. Then, an indium tin oxide film (ITO) is formed as the first transparent electrode 3 material on the entire surface of the elastic film 11 by using the sputtering method or the vacuum deposition method.

Thereafter, a photoresist, which is a photosensitive material, is formed on the entire surface of the indium tin oxide film by a spin coating method, and an exposure process and a development process are performed using a predetermined photomask to pattern the photoresist. Using the patterned photoresist as an etching mask, the indium tin oxide film is patterned to form the first transparent electrode 3. The processing steps from photoresist formation to etching are hereinafter referred to as photoetching.

The etching treatment of the indium tin oxide film is performed by wet etching using a mixed solution of ferric chloride and hydrochloric acid.

After that, the first alignment film 5 made of a polyimide film is formed on the first transparent electrode 3 by a printing method.

Next, a method of manufacturing the second substrate 2 will be described. An indium tin oxide film is formed as a material for the second transparent electrode 4 on the entire surface of the second substrate 2 by a sputtering method or a vacuum evaporation method, and is formed into a predetermined pattern by a photoetching method to provide the second transparent electrode 4. . Then the second
Second alignment film 6 made of a polyimide film on the transparent electrode 4 of
Is provided by the printing method.

Thereafter, the alignment film 3 on the first substrate 1 and the second alignment film 6 on the second substrate 2 are each subjected to a predetermined alignment treatment. This alignment treatment is performed by rubbing the surface of the alignment film with a cloth.

After that, the sealing material 9 is provided in a predetermined pattern on the first substrate, and silica beads having high hardness are dispersed as the internal spacers 8 on the second substrate. The inner spacer 8 made of silica beads is transparent or milky white, and has a hardness that does not deform during the pressure treatment of the sealing material 9 and the pressure treatment after injecting the liquid crystal substance 7. Select and use.

The first substrate 1 and the second substrate 2 are faced to each other as shown in FIG. 1 and overlapped with each other, and then pressure-fired to cure the sealing material 9. Then the liquid crystal substance 7
After being injected from the injection port, the liquid crystal material 7 is pressed again for gap adjustment to push out excess liquid crystal substance 7 from the injection port, and the injection port is sealed.

Here, the method of forming the elastic film 11 and the method of spraying the inner spacers 8 which are the features of the present invention will be described in more detail.

In the embodiment of the present invention, a thermosetting acrylic transparent resin is used as the elastic film 11. Then, after forming on the entire surface of the first substrate 1 by the spin coating method,
The elastic film 11 was formed by heat treatment and curing. The thickness of the elastic film 11 was 2.5 μm. After that, as described above, the formation of the first transparent electrode 3, the formation of the first alignment film 5, and the alignment treatment are performed.

The thickness of the elastic film 11 is 2.5 μm this time.
However, it has been confirmed through experiments that the occurrence of frame gap unevenness can be suppressed within the range of 1 μm to 4 μm.

The sealing material 9 is formed on the first alignment film 5 which has been subjected to this alignment treatment by a screen printing method.
The sealing material 9 is a thermosetting epoxy resin mixed with a glass fiber (made by Nippon Electric Glass) having a diameter of 6.0 μm as an in-seal spacer 10.

The second transparent electrode 4 is formed on the second substrate 2, and the second alignment film 6 is further formed. Then, after performing a predetermined alignment treatment on the second alignment film 6, the internal spacers 8 are dispersed.

As a method of spraying the internal spacers 8, 20 g of the internal spacers 8 made of silica beads having high hardness are mixed in a mixed solution of 350 cc of pure water and 350 cc of isopropyl alcohol and stirred with a stirrer while stirring the second substrate. Spray on 2.

By mixing silica beads in the above-mentioned mixed solution of pure water and isopropyl alcohol at the above ratio and spraying while stirring, it is possible to spray the second substrate 2 at a uniform spraying density. . Further, it is possible to suppress the occurrence of aggregation between the inner spacers 8. Further, it is possible to suppress the generation of stains on the substrate.

In the embodiment of the present invention, the above-mentioned spraying method is used, and the internal name of the super silica LS-57WF (trade name: Super Silica LS-57WF ( Tokuyama soda) was sprayed at a spraying density of 200 pieces / mm ² to 250 pieces / mm ² .

This time, 200 pieces / mm ² to 250 pieces / m
Inner spacer 8 was sprayed at a spray density of m ² , but 10
The inventor has also confirmed by experiments that it can be used in a distribution density range of 0 pieces / mm ² to 400 pieces / mm ² . The use in this distribution density range will be described in detail later.

After the first substrate 1 and the second substrate 2 thus prepared are aligned and superposed, the first substrate 1 and the second substrate 2 are pressed against each other and baked under pressure. The sealing material 9 is cured by processing. Then, the liquid crystal material 7 can be sealed between the first substrate 1 and the second substrate 2 to manufacture a liquid crystal display panel.

In the liquid crystal display panel thus manufactured, no frame gap unevenness was generated in the vicinity of the seal material 9, and no bubbles were generated in the liquid crystal substance 7 even when the liquid crystal display panel was left at a low temperature.

The reason why no bubbles were generated when left at low temperature was as follows.
Even if the liquid crystal substance 7 contracts at a low temperature, it is considered that the deformation of the elastic film 11 causes the silica beads of the inner spacer 8 to sink into the elastic film 11, thereby reducing the cell gap and preventing the generation of bubbles.

Further, when the inner spacer 8 is made of silica beads, it is not significantly deformed when the inner spacer 8 is made of silica beads during pressure firing for curing the sealing material 9. For this reason, it is considered that the sealing material 9 does not harden in a tapered shape and the occurrence of frame gap unevenness in the vicinity of the sealing material 9 is prevented.

Here, the basis of the dispersion density of the silica beads in the above range will be described in detail with reference to FIG.
FIG. 2 is a graph showing the relationship between the dispersion density of silica beads and the cell gap. The liquid crystal display panel used here is
The substrate on which the elastic film 11 was formed to a thickness of 2.5 μm by the manufacturing method described above was used as one substrate.

As shown in FIG. 2, if the inner spacers 8 are distributed at a distribution density of 100 / mm ² or more, a cell gap accuracy of plus or minus 0.05 μm can be obtained. This cell gap accuracy can be applied to the manufacture of STN type liquid crystal display panels.

Then, as is clear from the graph of FIG.
If the inner spacers 8 are sprayed at a spraying density of less than 100 / mm ^{2, the} accuracy of the cell gap accuracy described above cannot be satisfied.

In the liquid crystal display panel in which the internal spacers 8 were formed under the condition of the dispersion density of 100 pieces / mm ² to 400 pieces / mm ² , the occurrence of frame gap unevenness, which was a conventional problem, was not observed. In addition, when the liquid crystal display panel was left at a low temperature, no bubbles were found in the liquid crystal substance 7.

The silica beads of the inner spacer 8 are set to 100.
When sprayed at a low density of less than 1 cell / mm ^2, the uniformity of the cell gap size was poor, and the liquid crystal display panel had unevenness in the density of the display screen. It is considered that the current dispersion technology of the internal spacers 8 has a large dispersion in the dispersion density, and the lower the dispersion density, the greater the influence on the cell gap size variation.

On the other hand, when silica beads as the inner spacers 8 are scattered at a high density of more than 400 / mm ² , the cell gap is good, and the frame gap is not uneven, and a uniform display is obtained. You can get the screen. However, the liquid crystal display panel has a low display quality in which a large amount of light leaks from the silica beads, the contrast is low, and a large number of white dots are visible in the black display screen display.

In the first embodiment of the present invention described above,
Although the elastic film 11 has been described as an example in which it is provided only on the first substrate 1, it may be provided only on the second substrate 2, or may be provided on both the first substrate 1 and the second substrate 2. Good. At this time, the inventor has confirmed by experiments that the cell gap is uniform and a uniform display screen can be obtained without the occurrence of frame gap unevenness.

In the first embodiment of the present invention described above,
The example in which the elastic film 11 is provided on the entire surface of the substrate 1 has been described.
It may be provided only in the area of the display screen central portion 21, or may be provided in the area of the display screen central portion 21 and the lower region of the sealing material 9.

When the elastic film 11 is selectively provided as described above, it is possible to prevent a disconnection accident at the external connection portion of the first transparent electrode 3. As a method of selectively forming the elastic film 11, there are a printing method and a method of forming the elastic film 11 on the entire surface and then patterning it by photoetching.

Next, the structure of the liquid crystal display panel and the manufacturing method thereof in the second embodiment of the present invention will be described with reference to FIG. The first embodiment uses milky white or transparent silica beads, while the second embodiment is characterized by using black silica beads as the inner spacer 8.

As shown in the first embodiment, the elastic film 11
100 silica beads as the inner spacer 8 /
By spraying at a spraying density of from 400 mm ² to 400 mm ² / mm ² , it is possible to obtain a liquid crystal display panel in which no frame gap unevenness occurs and no bubbles are generated even when left at a low temperature.

However, when the dispersion density is high, it is not possible to completely prevent light leakage from the milky white or transparent silica beads that are the inner spacers 8, resulting in a decrease in contrast, and white dots are displayed on the black display screen. A large number of visible images are displayed, and the display quality of the liquid crystal display panel is degraded.

In order to improve this point, the second embodiment of the present invention has the same structure and processing steps as those of the first embodiment,
As the inner spacer 8, 250 black silica beads trade name Super Silica LS-57BF (made by Tokuyama Soda)
A liquid crystal display panel was obtained by spraying at a spraying density of pieces / mm ² .

The method of spraying the inner spacers 8 was the same as in the first embodiment. 20 g of the inner spacers 8 made of silica beads having high hardness were mixed in a mixed solution of 350 cc of pure water and 350 cc of isopropyl alcohol, It is sprinkled on the second substrate 2 while stirring with a stirrer.

As a result, no frame gap unevenness is generated in the region near the sealing material 9, no bubbles are generated at a low temperature, and no light leaks from the inner spacer 8.
A liquid crystal display panel with high contrast and high display quality can be obtained.

In the second embodiment of the present invention, the elastic film 11 may be provided only on the first substrate 1, and the second film may be provided.
May be provided only on the substrate 2 of the first substrate 1
And the second substrate 2 may be provided. At this time, the inventor has confirmed by experiments that the uniformity of the cell gap size is good and that a uniform display screen can be obtained without the occurrence of frame gap unevenness.

Further, in the second embodiment of the present invention, the elastic film 11 may be provided on the entire surface of the substrate, may be provided only in the central area 21 of the display screen, and may further be provided in the central area 21 of the display screen. It may be provided in the lower region of the sealing material 9.

When the elastic film 11 is selectively provided as described above, it is possible to prevent a disconnection accident at the external connection portion of the first transparent electrode 3. As a method of selectively forming the elastic film 11, there are a printing method and a method of forming the elastic film 11 on the entire surface and then patterning it by photoetching.

Next, the structure of the liquid crystal display panel and the manufacturing method thereof according to the third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a sectional view showing a liquid crystal display panel according to the third embodiment of the present invention. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals.

As shown in FIG. 3, the light-shielding film 12 is provided on the first substrate 1, the elastic film 11 is provided on the light-shielding film 12, and the first transparent electrode 3 is further provided on the first transparent electrode 3. A first alignment film 5 is provided on the transparent electrode 3.

On the other hand, the second transparent electrode 4 is also provided on the second substrate 2, and the second alignment film 6 is formed on the second transparent electrode 4.
To provide. The elastic film 11 is made of a transparent resin material.

Then, the periphery of the first substrate 1 and the second substrate 2 is surrounded by a sealing material 9 made of a thermosetting adhesive.
Then, the liquid crystal substance 7 is injected between the first substrate 1 and the second substrate 2.

Further, in order to keep the cell gap of the liquid crystal display panel uniform, an inner spacer 8 is provided over the entire display screen in the inner region of the sealing material 9, and an in-seal spacer 10 is provided inside the sealing material 9. It is mixed.
As the inner spacer 8, transparent or milky white silica beads or glass fiber is used.

The feature of the third embodiment of the present invention is that light leakage between the plurality of first transparent electrodes 3 provided on the first substrate 1 with the light shielding film 12 made of a conductive metal thin film is prevented. It is to be provided as a light-shielding film for preventing, and also to use the elastic film 11 as an insulating layer for electrically insulating the light-shielding film 12 and the first transparent electrode 3.

Next, a manufacturing method for forming a liquid crystal display panel in the third embodiment of the present invention shown in FIG. 3 will be described with reference to FIG.

A chrome film is formed on the entire surface of the first substrate 1 by a sputtering method or a vacuum evaporation method, and is formed into a predetermined pattern by a photo etching method to provide a light shielding film 12.

After that, the elastic film 11 material made of a thermosetting transparent acrylic resin is formed on the entire surface of the light shielding film 12 by a spin coating method. After that, baking treatment is performed to cure the thermosetting transparent acrylic resin to provide the elastic film 11. The thickness of the elastic film 11 is 2.5 μm.

After that, an indium tin oxide film is formed on the entire surface of the elastic film 11 by a sputtering method or a vacuum evaporation method, and is formed into a predetermined pattern by a photo etching method to form a first transparent electrode 3. Then, the first alignment film 5 made of a polyimide film is provided on the first transparent electrode 3 by a printing method.

The second substrate 2 is the second substrate 2
An indium tin oxide film is formed on the entire upper surface by a sputtering method or a vacuum evaporation method, and is formed into a predetermined pattern by a photo etching method to form a second transparent electrode 4. After that, a second polyimide film formed on the second transparent electrode 4 is formed.
The alignment film 6 is formed by a printing method.

Further, the first alignment film 5 on the first substrate 1
And the second alignment film 6 on the second substrate 2 are rubbed with a cloth.

Further, a sealing material 9 mixed with a spacer 10 in the seal is provided on the peripheral portion of the first substrate 1 by a screen printing method. Further, 250 / inner spacers 8 made of milky white or transparent silica beads are provided on the second substrate 2.
Spray at a spray density of around mm ² .

The method of spraying the inner spacer 8 is as follows.
The conditions are the same as those in the example. That is, 20 g of the inner spacer 8 made of high-hardness silica beads was added to a mixed liquid of pure water 350 cc and isopropyl alcohol 350 cc.
It is mixed and sprayed on the second substrate 2 while stirring with a stirrer.

After the first substrate 1 and the second substrate 2 are opposed to each other and aligned with each other as shown in FIG. 3, they are pressure-fired to cure the sealing material 9. Then, the liquid crystal substance 7 is injected through the injection port between the first substrate 1 and the second substrate 2, and the liquid crystal substance 7 is pressed again to adjust the cell gap to push out excess liquid crystal substance from the injection port. Seal.

In the liquid crystal display panel manufactured in this way, there is no frame gap unevenness in the vicinity of the sealing material 9,
Furthermore, the liquid crystal display panel 7 is a good liquid crystal display panel in which no bubbles are observed in the liquid crystal substance 7 when left at low temperature.

Furthermore, the light-shielding film 12 on the first substrate 1 and the first transparent electrode 3 are completely electrically insulated, and normal display can be performed without any trouble.

In the third embodiment of the present invention, the case where milky white or transparent silica beads are used as the inner spacer 8 has been described, but if black silica beads are used as the inner spacer 8, the light from the inner spacer 8 is It is possible to provide a liquid crystal display panel capable of suppressing leakage and having high contrast and high display quality.

The structure of the liquid crystal display panel and the manufacturing method thereof according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view showing a liquid crystal display panel in the fourth embodiment. In FIG. 4, the same components as those in FIGS. 1 and 3 are designated by the same reference numerals.

As shown in FIG. 4, a color filter layer 13 is provided on the first substrate 1, a first transparent electrode 3 is provided on the color filter layer 13, and a first transparent electrode 3 is provided on the first transparent electrode 3. Provides the first alignment film 5. On the other hand, the second substrate 2
The second transparent electrode 4 is also provided on the upper surface of the second transparent electrode 4
A second alignment film 6 is provided on the top.

The periphery of the first substrate 1 and the second substrate 2 is sealed with a sealing material 9 made of a thermosetting adhesive.
Then, the liquid crystal substance 7 is injected between the first substrate 1 and the second substrate 2.

Further, in order to keep the cell gap of this liquid crystal display panel uniform, an inner spacer 8 is provided over the entire display screen in the inner region of the sealing material 9, and an in-seal spacer 10 is provided inside the sealing material 9. It is mixed.
As the inner spacer 8, transparent or milky white silica beads or glass fiber is used.

The feature of the fourth embodiment of the present invention shown in FIG. 4 is that the color filter layer 13 is used as an elastic film instead of the elastic film 11 in the first and second embodiments. It is in.

Next, a manufacturing method for forming the liquid crystal display panel in the fourth embodiment of the present invention shown in FIG. 4 will be described.

The color filter layer 13 is formed on the first substrate 1.
To form. The color filter layer 13 was formed by a photolithography method, and a pigment dispersion type filter was formed with a film thickness of 1.4 μm. In addition, the color filter layer 13 can be formed by another method such as a printing method.

Then, an indium tin oxide film is formed on the entire surface of the first substrate 1 including the color filter layer 13 and the region where the color filter layer 13 is not formed by a sputtering method or a vacuum evaporation method. afterwards,
The first transparent electrode 3 is formed in a predetermined pattern by photoetching. Then, the first alignment film 5 made of a polyimide film is provided on the first transparent electrode 3 by a printing method.

The second substrate 2 is the second substrate 2
An indium tin oxide film is formed on the entire upper surface by a sputtering method or a vacuum evaporation method, and is formed into a predetermined pattern by a photo etching method to provide a second transparent electrode 4. Then, the second alignment film 6 made of a polyimide film is provided on the second transparent electrode 4 by a printing method.

After that, the first alignment film 5 on the first substrate 1 is formed.
And a second alignment film 6 on the second substrate 2 are subjected to a predetermined alignment treatment by rubbing with a cloth. Further, a sealing material 9 containing an in-seal spacer 10 is mixed in the peripheral portion of the first substrate 1.
Are formed by a screen printing method.

Further, milky white or transparent silica beads are sprayed on the second substrate 2 as internal spacers 8 at a spraying density of 250 beads / mm ² .

The method of spraying the inner spacer 8 is as follows.
The conditions are the same as those in the example. That is, 20 g of the inner spacer 8 made of high-hardness silica beads was added to a mixed liquid of pure water 350 cc and isopropyl alcohol 350 cc.
It is mixed and sprayed on the second substrate 2 while stirring with a stirrer.

After that, the first substrate 1 and the second substrate 2 are faced to each other as shown in FIG. 4 and overlapped with each other, and then pressure-fired to cure the sealing material 9. afterwards,
The liquid crystal material 7 is injected through the injection port, and the liquid crystal material 7 is pressed again to adjust the cell gap to push the excess liquid crystal material 7 through the injection port, and then the injection port is sealed.

The liquid crystal display panel manufactured in this manner has no frame gap irregularity in the vicinity of the sealing material 9,
Further, a good liquid crystal display panel can be obtained in which no bubbles are generated in the liquid crystal substance 7 when left at a low temperature.

In the fourth embodiment of the present invention, milky white or transparent silica beads are used as the inner spacer 8. However, if black silica beads are used as the inner spacer 8, light leakage from the inner spacer 8 is suppressed. Therefore, it is possible to provide a liquid crystal display panel having high contrast and good display quality.

In the fourth embodiment of the present invention, the light-shielding film made of a conductive thin film is not used as a light-shielding film for preventing light leakage between transparent electrodes, but a structure having a light-shielding film is adopted. Then, the color filter layer 13 can be used as an electrically insulating film between the light shielding film and the first transparent electrode 3, and the color filter layer 13 can be used as an elastic film.

Next, the structure of the liquid crystal display panel and the manufacturing method thereof in the fifth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a sectional view showing a liquid crystal display panel in the fifth embodiment of the present invention. Note that in FIG.
The same components as those in FIGS. 3 and 4 are designated by the same reference numerals.

As shown in FIG. 5, a light-shielding film 12 is provided on the first substrate 1, a color filter layer 13 is provided on the light-shielding film 12, and planarization is performed so as to cover the color filter layer 13. The layer 14 is provided. Further, the first transparent electrode 3 is provided on the flattening layer 14, and the first alignment film 5 is provided on the first transparent electrode 3.

On the other hand, the second transparent electrode 4 is provided on the second substrate 2, and the second alignment film 6 is provided on the second transparent electrode 4.
To provide.

The periphery of the first substrate 1 and the second substrate 2 is sealed with a sealing material 9 made of a thermosetting adhesive.
Then, the liquid crystal substance 7 is injected between the first substrate 1 and the second substrate 2.

Further, in order to keep the cell gap of this liquid crystal display panel uniform, an inner spacer 8 is provided over the entire display screen in the inner region of the sealing material 9, and an in-seal spacer 10 is provided inside the sealing material 9. It is mixed.
As the inner spacer 8, transparent or milky white silica beads or glass fiber is used.

The feature of the present invention shown in FIG. 5 is that the light shielding film 12 is provided in the boundary region of each color of the color filter layer 13 made of red, green and blue, and further on the color filter layer 13 and the first substrate 1. The point is that the flattening layer 14 is provided in and.

Next, a manufacturing method for forming the structure of the liquid crystal display panel shown in FIG. 5 will be described. As shown in FIG. 5, a chromium film is first formed on the entire surface of the first substrate 1 by a sputtering method or a vacuum evaporation method.

After that, this chrome film is formed into a predetermined pattern by the photo etching method to form the light shielding film 12. The purpose of providing the light-shielding film 12 is to prevent a decrease in contrast due to light leakage between transparent electrodes. A structure in which the light shielding film 12 is not formed is conceivable in order to reduce the product price, but it is applied in the fifth embodiment of the present invention.

In addition to the method of forming the light-shielding film 12 by the formation of the chrome film and the photoetching process, there is also a method of forming the light-shielding film 12 by forming a black pigment by a printing method. The present invention can also be applied to the liquid crystal display panel of the present invention by the light shielding film 12 formed by this photoetching and the light shielding film 12 formed by a printing method.

Thereafter, a pigment dispersion type red, green and blue color filter layer 13 is provided on the light shielding film 12 by using a photolithography method.

After that, this color filter layer 1
A thermosetting transparent acrylic resin is formed as a material for the flattening film 14 on the entire surface by spin coating on the surface 3, and is baked to form the flattening film 14. The purpose of providing the flattening film 14 is to absorb irregularities on the surface of the color filter layer 13 and make the surface flatter. In the fifth embodiment of the present invention, the color filter layer 13 has a thickness of 1.
The thickness of the flattening film 14 is about 4 μm, and the thickness of the flattening film 14 is about 2.8 μm.

After that, an indium tin oxide film as the first transparent electrode 3 material is formed on the entire surface of the flattening film 14 by a sputtering method or a vacuum evaporation method. Then, the indium tin oxide film is formed into a predetermined pattern by using a photoetching method to form the first transparent electrode 3. After that, the first alignment film 5 made of a polyimide film is provided on the first transparent electrode 3 by a printing method.

The second substrate 2 is the second substrate 2
An indium tin oxide film is formed as a material for the second transparent electrode 4 on the entire upper surface by a sputtering method or a vacuum evaporation method.

Then, this indium tin oxide film is formed into a predetermined pattern by photoetching,
The second transparent electrode 4 is formed. Then, the second alignment film 6 made of a polyimide film is provided on the second transparent electrode 4 by a printing method.

Thereafter, each of the first alignment film 5 formed on the first substrate 1 and the second alignment film 6 formed on the second substrate 2 thus formed is subjected to a predetermined alignment treatment by rubbing with a cloth. Give.

Then, a thermosetting epoxy resin mixed with a glass fiber having a diameter of 7.4 μm as the in-seal spacer 10 is formed in a predetermined pattern on the peripheral portion of the first substrate 1 by a screen printing method, A sealing material 9 is provided.

On the second substrate 2, 250 milky white or transparent silica beads having a diameter of 5.7 μm and high hardness are formed.
Disperse at a dispersal density of around 1 / mm ² .

The method of spraying the inner spacer 8 is as follows.
The conditions are the same as those in the example. That is, 20 g of the inner spacer 8 made of high-hardness silica beads was added to a mixed liquid of pure water 350 cc and isopropyl alcohol 350 cc.
It is mixed and sprayed on the second substrate 2 while stirring with a stirrer.

Then, the first substrate 1 and the second substrate 2 are made to face each other as shown in FIG. 5, aligned and superposed, and pressure-fired to cure the sealing material 9. After that, the liquid crystal substance 7 is injected from the injection port between the first substrate 1 and the second substrate 2, and further pressure is applied to adjust the cell gap. Excess liquid crystal substance is pushed out from the injection port to open the injection port. Seal.

With the liquid crystal display panel thus formed, it is possible to obtain a good liquid crystal display panel in which no bubbles are generated in the liquid crystal substance 7 when left at a low temperature, and the frame gap unevenness in the vicinity of the sealing material 9 does not occur. it can.

Although the milky white or transparent silica beads are used as the inner spacer 8 in the fifth embodiment of the present invention described above, black silica beads may be used as the inner spacer 8.

If black silica beads are used as the inner spacers 8, light leakage from the inner spacers 8 can be suppressed, and a liquid crystal display panel having high contrast and high display quality can be provided.

The reason why the fifth embodiment of the present invention makes it possible to obtain a good liquid crystal display panel in which no bubbles are generated in the liquid crystal substance 7 when left at a low temperature and there is no frame gap unevenness is considered as follows.

Even if the liquid crystal substance 7 contracts by being left at a low temperature,
The color filter layer 13 and the flattening film 14 act as an elastic film, the color filter layer 13 and the flattening film 14 are deformed, and the silica beads that are the internal spacers 8 are embedded, so that the cell gap is reduced and bubbles are generated. I think I'm preventing it.

Furthermore, when the sealing material 9 is pressure-fired, the silica beads of the inner spacer 8 do not significantly deform like the plastic beads, so that the sealing material 9 is not deformed.
Does not harden into a taper shape, preventing unevenness in the frame gap.

Although the embodiments of the present invention described above are explained in the STN mode, other modes such as TN
LCD panel characteristics are sensitive to cell gap variations when a thin cell gap is used for display, ferroelectric display, anti-ferroelectric display, active display, transmissive display, and reflective display. By applying the present invention, a liquid crystal display panel having a uniform cell gap size can be obtained.

Further, although the embodiment in which silica beads are used as the inner spacer 8 has been described, glass fibers can also be applied, and the same effect as when silica beads are used as the inner spacer 8 can be obtained.

[0170]

As is apparent from the above description, the present invention provides the elastic film on the substrate. Further, 100 beads / mm ² to 400 silica beads having high hardness and not deformed by pressure are used as an inner spacer through the elastic film.
Range of distribution density of pcs / mm ² , preferably 200 pcs / m
Adopt a structure with a distribution density of m ² to 400 pieces / mm ² .

Therefore, even if the liquid crystal substance contracts when left at a low temperature, the elastic film is deformed and the silica beads having high hardness penetrate into the elastic film to reduce the cell gap, and it is possible to prevent the generation of bubbles.

Further, the internal spacer made of silica beads or glass fibers, which has higher hardness and is not deformed by pressure, does not significantly deform like plastic beads when the sealing material is pressure-fired. Therefore, the sealing material does not harden into a tapered shape, and the occurrence of frame gap unevenness is prevented.

Further, by using silica beads or glass fibers, which have high black hardness and are not deformed by pressure, as internal spacers, it is possible to prevent light leakage from the internal spacers and prevent deterioration of contrast.

As described above, by using the liquid crystal display panel of the present invention, it is possible to provide a liquid crystal display panel of high display quality in which no bubbles are generated in the liquid crystal substance when left at a low temperature and there is no frame gap unevenness. be able to.

Further, the internal spacers are mixed in a mixed liquid of pure water and isopropyl alcohol, and the internal spacers are sprinkled on the substrate while stirring the mixed liquid. Therefore, the inner spacers do not aggregate with each other and can be sprayed at a uniform spraying density. Furthermore, by scattering the inner spacers in this manner, it is possible to prevent the occurrence of stains on the substrate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a liquid crystal display panel and a method of manufacturing the same according to an embodiment of the present invention.

FIG. 2 is a graph showing a relationship between an inner spacer dispersion density and a cell gap of a liquid crystal display panel according to an example of the present invention.

FIG. 3 is a cross-sectional view showing a structure of a liquid crystal display panel and a method of manufacturing the same according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a structure of a liquid crystal display panel and a manufacturing method thereof according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a structure of a liquid crystal display panel and a method of manufacturing the same in an embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a structure of a liquid crystal display panel and a manufacturing method thereof according to a conventional technique.

FIG. 7 is a plan view for explaining a frame gap unevenness that occurs in a structure of a liquid crystal display panel and a manufacturing method thereof in the related art.

FIG. 8 is a cross-sectional view for explaining a frame gap unevenness that occurs in a structure of a liquid crystal display panel and a manufacturing method thereof in the related art.

FIG. 9 is a cross-sectional view for explaining a frame gap unevenness which occurs in a structure of a liquid crystal display panel and a manufacturing method thereof in the related art.

FIG. 10 is a cross-sectional view for explaining a frame gap unevenness which occurs in a structure of a liquid crystal display panel and a manufacturing method thereof in the related art.

FIG. 11 is a cross-sectional view for explaining a frame gap unevenness that occurs in a structure of a liquid crystal display panel and a manufacturing method thereof in the related art.

[Explanation of symbols]

 1 1st substrate 2 2nd substrate 3 1st transparent electrode 4 2nd transparent electrode 5 1st alignment film 6 2nd alignment film 7 Liquid crystal substance 8 Internal spacer 9 Seal material 10 Spacer in seal

Claims (34)

[Claims] 1. A first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and a second substrate has a second transparent electrode and a second alignment film. And further includes a sealing material provided between the first substrate and the second substrate in a peripheral portion thereof, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal substance. Liquid crystal display panel characterized by. 2. The first substrate has a first transparent electrode and a first alignment film, and the second substrate has an elastic film, a second transparent electrode on the elastic film, and a second alignment film. And further includes a sealing material provided between the first substrate and the second substrate in a peripheral portion thereof, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal substance. Liquid crystal display panel characterized by. 3. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is the elastic film and a second transparent electrode on the elastic film. And a second alignment film,
Further, it is characterized by further comprising a sealing material provided between the first substrate and the second substrate at a peripheral portion thereof, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal substance. Liquid crystal display panel. 4. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent electrode and a second alignment film. And further comprising a sealing material provided in a peripheral portion between the first substrate and the second substrate, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal substance, Internal spacers have a density of 100
A liquid crystal display panel, characterized in that the number is 400 pieces / mm ² to 400 pieces / mm ² . 5. The first substrate has a first transparent electrode and a first alignment film, and the second substrate has an elastic film, a second transparent electrode on the elastic film, and a second alignment film. And further comprising a sealing material provided in a peripheral portion between the first substrate and the second substrate, an internal spacer provided between the first substrate and the second substrate, and a liquid crystal substance, Internal spacers have a density of 100
A liquid crystal display panel, characterized in that the number is 400 pieces / mm ² to 400 pieces / mm ² . 6. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is the elastic film and a second transparent film on the elastic film. A sealant having an electrode and a second alignment film, further provided between the first substrate and the second substrate in a peripheral portion thereof, and an interior provided between the first substrate and the second substrate Equipped with spacers and liquid crystal material, the inner spacers have a distribution density of 100 / mm ² to 400 / mm
The liquid crystal display panel, characterized by ^two. 7. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent electrode and a second alignment film. And a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and a transparent or milky white and high hardness inner spacer provided between the first substrate and the second substrate. A liquid crystal display panel comprising: and a liquid crystal substance. 8. The first substrate has a first transparent electrode and a first alignment film, and the second substrate has an elastic film, a second transparent electrode on the elastic film, and a second alignment film. And a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and a transparent or milky white and high hardness inner spacer provided between the first substrate and the second substrate. A liquid crystal display panel comprising: and a liquid crystal substance. 9. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is the elastic film and a second transparent electrode on the elastic film. And a second alignment film,
Further, a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, a transparent or milky white inner spacer having high hardness and a liquid crystal substance provided between the first substrate and the second substrate. A liquid crystal display panel comprising: 10. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent electrode and a second alignment film. And a sealing material provided in the peripheral portion between the first substrate and the second substrate, and a transparent or milky white and highly hard interior provided between the first substrate and the second substrate. A liquid crystal display panel comprising a spacer and a liquid crystal material, wherein the dispersion density of the inner spacer is 100 / mm ² to 400 / mm ² . 11. The first substrate has a first transparent electrode and a first alignment film, and the second substrate is an elastic film, a second transparent electrode on the elastic film, and a second alignment film. And a sealing material provided in the peripheral portion between the first substrate and the second substrate, and a transparent or milky white and highly hard interior provided between the first substrate and the second substrate. A liquid crystal display panel comprising a spacer and a liquid crystal material, wherein the inner spacer has a dispersion density of 100 / mm ² to 400 / mm ² . 12. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is the elastic film and a second transparent film on the elastic film. A sealant having an electrode and a second alignment film, which is provided between the first substrate and the second substrate in the periphery thereof, and a transparent material provided between the first substrate and the second substrate. Alternatively, it has a milky white inner spacer having high hardness and a liquid crystal substance, and the inner spacer has a dispersion density of 1
A liquid crystal display panel, wherein the number is 00 / mm ² to 400 / mm ² . 13. The first substrate is an elastic film and the first on the elastic film.
Second transparent electrode and the first alignment film, and the second substrate is the second
A transparent electrode and a second alignment film, and further provided between the first substrate and the second substrate in a peripheral portion thereof,
A liquid crystal display panel comprising a black inner spacer having a high hardness and a liquid crystal material provided between the first substrate and the second substrate. 14. The first substrate has a first transparent electrode and a first alignment film, and the second substrate is an elastic film and a second film on the elastic film.
A transparent electrode and a second alignment film, and further provided between the first substrate and the second substrate in a peripheral portion thereof,
A liquid crystal display panel comprising a black inner spacer having a high hardness and a liquid crystal material provided between the first substrate and the second substrate. 15. The first substrate is an elastic film and the first on the elastic film.
A transparent substrate and a first alignment film, the second substrate has an elastic film, a second transparent electrode on the elastic film, and a second alignment film, and further has a first substrate and a second alignment film. Liquid crystal display panel comprising: a sealing material provided between the first substrate and the second substrate; and a black inner spacer provided between the first substrate and the second substrate and having high hardness, and a liquid crystal substance. . 16. The first substrate has an elastic film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent electrode and a second alignment film. And a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and a black inner spacer having high hardness provided between the first substrate and the second substrate. With liquid crystal material, the inner spacer has a dispersion density of 100 pieces / mm ² to 400 pieces / mm
The liquid crystal display panel, characterized by ^two. 17. The first substrate has a first transparent electrode and a first alignment film, and the second substrate is an elastic film and a second transparent electrode and a second alignment film on the elastic film. And a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and a black inner spacer having high hardness provided between the first substrate and the second substrate. With liquid crystal material, the inner spacer has a dispersion density of 100 pieces / mm ² to 400 pieces / mm
The liquid crystal display panel, characterized by ^two. 18. The first substrate is an elastic film and a first film on the elastic film.
A transparent substrate and a first alignment film, the second substrate has an elastic film, a second transparent electrode on the elastic film, and a second alignment film, and further has a first substrate and a second alignment film. And a sealing material provided in the peripheral portion between the first substrate and the second substrate, a black inner spacer having a high hardness and a liquid crystal substance provided between the first substrate and the second substrate, and the dispersion density of the inner spacer is 100. A liquid crystal display panel, characterized in that the number is 400 pieces / mm ² to 400 pieces / mm ² . 19. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is a second transparent film. A sealant having an electrode and a second alignment film, further provided between the first substrate and the second substrate in a peripheral portion thereof, and an interior provided between the first substrate and the second substrate A liquid crystal display panel comprising a spacer and a liquid crystal material. 20. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is a second transparent film. A sealant having an electrode and a second alignment film, further provided between the first substrate and the second substrate in a peripheral portion thereof, and an interior provided between the first substrate and the second substrate The spacers and the liquid crystal material are provided, and the dispersion density of the inner spacers is 100 / mm ² to 400 /
A liquid crystal display panel having a size of mm ² . 21. A first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent film. A sealant having an electrode and a second alignment film, which is provided between the first substrate and the second substrate in the periphery thereof, and a transparent material provided between the first substrate and the second substrate. Alternatively, a liquid crystal display panel comprising a milky white inner spacer having high hardness and a liquid crystal substance. 22. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is a second transparent film. A sealant having an electrode and a second alignment film, which is provided between the first substrate and the second substrate in the periphery thereof, and a transparent material provided between the first substrate and the second substrate. Alternatively, a liquid crystal display panel characterized by comprising a milky white inner spacer having high hardness and a liquid crystal substance, wherein the dispersion density of the inner spacer is 100 / mm ² to 400 / mm ² . 23. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate is a second transparent film. A sealant having an electrode and a second alignment film, which is provided between the first substrate and the second substrate in the periphery thereof, and a black material provided between the first substrate and the second substrate A liquid crystal display panel comprising an inner spacer having high hardness and a liquid crystal substance. 24. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second film. A sealant having a transparent electrode and a second alignment film, further provided between the first substrate and the second substrate in the peripheral portion thereof, and provided between the first substrate and the second substrate. Equipped with black and high hardness inner spacers and liquid crystal material, the inner spacers have a scattering density of 100 pieces /
A liquid crystal display panel, characterized in that the number is from ² to 400 pieces / mm ² . 25. The first substrate has a color filter layer, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film, and the second substrate is A second transparent electrode and a second alignment film, and a sealing material provided between the first substrate and the second substrate in the peripheral portion thereof, and the first substrate and the second substrate. A liquid crystal display panel comprising an internal spacer provided between the liquid crystal material and a liquid crystal material, wherein the dispersion density of the internal spacer is 100 pieces / mm ² to 400 pieces / mm ² . 26. The first substrate comprises a light-shielding film, a color filter layer provided on the light-shielding film, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film. The second substrate has a second transparent electrode and a second alignment film, and further has a sealing material provided in the peripheral portion between the first substrate and the second substrate, and the first substrate. A liquid crystal display panel, comprising: an internal spacer provided between a substrate and a second substrate; and a liquid crystal material, wherein the dispersion density of the internal spacer is 100 pieces / mm ² to 400 pieces / mm ² . 27. The first substrate has a color filter layer, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film, and a second substrate. Has a second transparent electrode and a second alignment film, and further has a first
And a sealing material provided in the peripheral portion between the substrate and the second substrate, and a transparent or milky white inner spacer having a high hardness and a liquid crystal substance provided between the first substrate and the second substrate, A liquid crystal display panel, wherein the dispersion density of the inner spacers is 100 pieces / mm ² to 400 pieces / mm ² . 28. The first substrate comprises a light-shielding film, a color filter layer provided on the light-shielding film, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film. The second substrate has a second transparent electrode and a second alignment film, and further has a sealing material provided in the peripheral portion between the first substrate and the second substrate, and the first substrate. A transparent or milky white internal spacer provided between the substrate and the second substrate and having a high hardness; and a liquid crystal substance, and the dispersion density of the internal spacer is 100 pieces / mm ² to 400 pieces / mm ^2. LCD display panel. 29. The first substrate has a color filter layer, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film, and a second substrate. Has a second transparent electrode and a second alignment film, and further has a first
The internal spacer provided between the first substrate and the second substrate in the periphery thereof, the black inner spacer provided between the first substrate and the second substrate and having high hardness, and the liquid crystal substance. Dispersion density of 100 / mm ² to 400 / m ²
A liquid crystal display panel characterized by having a size of m ² . 30. The first substrate comprises a light-shielding film, a color filter layer provided on the light-shielding film, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film. The second substrate has a second transparent electrode and a second alignment film, and further has a sealing material provided in the peripheral portion between the first substrate and the second substrate, and the first substrate. A black and high-hardness internal spacer provided between the substrate and the second substrate and a liquid crystal material are provided, and the internal spacer has a dispersion density of 100 / m.
A liquid crystal display panel, characterized in that the number is m ² to 400 pieces / mm ² . 31. The first substrate is an elastic film and the first on the elastic film.
Second transparent electrode and the first alignment film, and the second substrate is the second
A transparent electrode and a second alignment film, and further provided between the first substrate and the second substrate in a peripheral portion thereof,
The method of spraying the inner spacer in the method of manufacturing the liquid crystal display panel including the inner spacer provided between the first substrate and the second substrate and the liquid crystal material is performed by mixing the inner spacer with a mixed liquid of pure water and isopropyl alcohol. A method for manufacturing a liquid crystal display panel, which comprises spraying internal spacers on a substrate while stirring the mixed liquid. 32. The first substrate has a light-shielding film, an elastic film covering the light-shielding film, a first transparent electrode on the elastic film, and a first alignment film, and the second substrate has a second transparent film. A sealant having an electrode and a second alignment film, further provided between the first substrate and the second substrate in a peripheral portion thereof, and an interior provided between the first substrate and the second substrate The method of spraying the inner spacer in the method of manufacturing a liquid crystal display panel including the spacer and the liquid crystal substance is as follows. A method for manufacturing a liquid crystal display panel, comprising: 33. The first substrate has a color filter layer, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film, and a second substrate. Has a second transparent electrode and a second alignment film, and further has a first
In a method of manufacturing a liquid crystal display panel, comprising: a sealing material provided between the first substrate and the second substrate in a peripheral portion thereof; an internal spacer provided between the first substrate and the second substrate; and a liquid crystal substance. The method for spraying spacers is a method for manufacturing a liquid crystal display panel, which comprises mixing an internal spacer in a mixed solution of pure water and isopropyl alcohol, and spraying the internal spacer on a substrate while stirring the mixed solution. 34. The first substrate comprises a light-shielding film, a color filter layer provided on the light-shielding film, a planarizing layer provided on the color filter layer, a first transparent electrode on the planarizing layer, and a first alignment film. The second substrate has a second transparent electrode and a second alignment film, and further has a sealing material provided in the peripheral portion between the first substrate and the second substrate; The method of spraying the inner spacer in the method of manufacturing the liquid crystal display panel including the inner spacer provided between the substrate and the second substrate and the liquid crystal material is performed by mixing the inner spacer with a mixed liquid of pure water and isopropyl alcohol. A method for manufacturing a liquid crystal display panel, which comprises spraying internal spacers on a substrate while stirring the liquid.