JPH07225372A - Liquid crystal display device and its production - Google Patents

Abstract

PURPOSE:To improve display quality, ease of display images and contrast by increasing transmittance of light from a liquid crystal display substrate side and preventing reflection of incoming light. CONSTITUTION:This liquid crystal display device has at least an upper electrode substrate 11, a lower electrode substrate 12, a liquid crystal layer 50, an oriented film, an upper polarizing plate 15 and a lower polarizing plate 16 as constituting materials. A light absorbent film 100 is formed by application of a soln. prepd. by mixing at least either of org. dyes and pigments into at least one kind of alcohol solns. selected from respective alkoxides of silicon, zinc and titanium on the outside surface of this device.

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,
In particular, the present invention relates to a liquid crystal display device having anti-reflection of external light on an image display surface, high contrast property, and high purity, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Generally, a liquid crystal display device has a problem that an upper polarizing plate surface (outer surface) which is an image display surface thereof is in a glossy state, so that it is easy to reflect external light and it becomes difficult to read an image. .

This problem has been taken up as a problem of the working environment of the operator when the information device is used as a terminal, and under these circumstances, antireflection measures for liquid crystal display devices are strongly required.

As a countermeasure against this, there is a method such as so-called silica spray coating on the surface of the upper polarizing plate for non-glare treatment, or forming a multilayer film by sputtering or the like to provide an antireflection film due to optical interference. Proposed.

As a disclosure of the prior art relating to this type of antireflection film, for example, Japanese Patent Laid-Open No. 61-120.
No. 121, and JP-A-60-21874, in which a layer of silica particles is formed on the panel surface of a cathode ray tube.
No. 7 publication can be cited.

[0006]

FIG. 6 is a cross-sectional view schematically showing the structure of a conventional liquid crystal display device coated with silica spray, in which 11 is an upper electrode substrate, 12 is a lower electrode substrate, and 14 is a lower electrode substrate. Silica non-glare film (anti-reflection film), 15 is an upper polarizing plate, 16 is a lower polarizing plate, 17 is a semitransparent film, 40 is a birefringent member, 50 is a liquid crystal layer, 52 is a sealant, 60 is a liquid crystal cell, and 62 is a liquid crystal cell. A liquid crystal display substrate, 63 is a light guide, 101A is an optical path (external light), and 101B is an optical path (display image light).

The one shown in the figure is an example of a semi-transmissive liquid crystal display device, which has a semi-transparent film 17 between the lower polarizing plate 16 and the light guide 63, and is in a transmissive mode when the backlight is on. In addition, when the backlight is off, the display is performed in the reflection mode.

In both the reflective mode and the transmissive mode, the external light 101A is reflected at each interface of each component and the displayed image becomes very difficult to see. I attached an uneven film (silica non-glare film) to blur the outline of external light so that I could see the image.

Further, when the image is viewed in the transmission mode, the display image light 101B using the backlight as a light source has a spectrum peak unnecessary for the emission of the backlight, which deteriorates the color purity especially in the case of a color liquid crystal display device. There was an occasion. Further, the silica spray-coated concavo-convex film has a drawback that the diffuse reflection is strong and the contrast is lowered.

On the other hand, there is also a method of attaching a film having an antireflection film of a light interference multilayer film formed by sputtering or the like. Although this has excellent characteristics, it requires large-scale manufacturing equipment such as a sputtering device and is very expensive.

An object of the present invention is to provide a liquid crystal display device having a novel structure and a manufacturing method thereof which simultaneously satisfy antireflection performance, high contrast, high color purity and low manufacturing cost.

[0012]

In order to achieve the above-mentioned object, the invention according to claim 1 has, as a constituent material, an upper electrode substrate, a lower electrode substrate, a liquid crystal, an alignment film, an upper polarizing plate and a lower polarizing plate. At least one of an organic dye and a pigment is mixed on the outer surface of the liquid crystal display device in an alcohol solution of at least one selected from silicon, zinc, and titanium alkoxides. It is characterized in that a film having a light absorption property formed by applying a solution is provided.

The invention according to claim 2 is a liquid crystal display device having at least an upper electrode substrate, a lower electrode substrate, a liquid crystal, an alignment film, an upper polarizing plate, and a lower polarizing plate as constituent materials. A solution in which at least one selected from tin oxide, indium oxide, titanium oxide and antimony oxide and an alcohol solution of ethyl silicate are mixed with at least one of an organic dye and a pigment is formed on the outer surface of A first layer film having a refractive index larger than that of the constituent material having light absorption performance by coating, and at least one alcohol solution selected from silicon, zinc, and titanium alkoxides are formed by coating. A second layer having at least a second layer having a refractive index smaller than that of the first layer film, and having the light absorption performance and the first layer and the second layer.
It is characterized in that a surface-treated film having antireflection property due to light interference of the layer is provided.

Further, the invention according to claim 3 is the method for manufacturing a liquid crystal display device, which comprises at least an upper electrode substrate, a lower electrode substrate, a liquid crystal, an alignment film, an upper polarizing plate and a lower polarizing plate as constituent materials. At least one organic dye or pigment is mixed in a mixed solution of at least one selected from tin oxide, indium oxide, titanium oxide and antimony oxide and an alcohol solution of ethyl silicate on the outer surface of the liquid crystal display device. Coating solution to form a first layer film having a refractive index higher than that of the above-mentioned constituent material having a light absorbing property, and at least one selected from silicon, zinc and titanium alkoxides. At least forming a second layer film having a refractive index smaller than that of the first layer film after applying the alcohol solution of two kinds. Wherein the the provision of the surface treatment film having antireflection performance due to interference of light. In addition, in the invention described in claim 1 or 2, the surface-treated film has a wavelength selective absorption performance.

[0015]

That is, in the schematic sectional view for explaining the basic constitution of the liquid crystal display device according to the present invention shown in FIG. 1, 11 is an upper electrode substrate, 12 is a lower electrode substrate, 15 is an upper polarizing plate, 16
Is a lower polarizing plate, 17 is a semitransparent film (reflecting plate), 40 is a birefringent member, 50 is a liquid crystal layer, 52 is a sealant, 60 is a liquid crystal cell, 62 is a liquid crystal display substrate, 63 is a light guide, and 100 is It is a light absorbing film.

As shown in the figure, the present invention is basically
The liquid crystal display substrate 62 and the upper polarizing plate 15 of this liquid crystal display substrate
Is characterized in that the surface thereof is provided with a light absorbing film 100 which simultaneously satisfies antireflection performance, high contrast and high color purity.

When there is a glass plate or the like on which the pen can be traced further outside the upper polarizing plate as in the liquid crystal display device for pen input, the light absorbing film as described above is provided on the outer surface of the glass plate or the like. It may be provided. Further, a light absorbing film may be provided on both outer surfaces of the glass plate or the like.

The antireflection film is formed by adding an organic dye and / or an organic dye and / or an organic dye to a substrate constituting the outer surface of the liquid crystal display device in an alcohol solution selected from alkoxides of silicon, zinc and titanium. A solution mixed with a pigment is applied to form a film having a light absorbing property.

In order to further improve the antireflection performance, first, at least one kind selected from tin oxide, indium oxide, titanium oxide and antimony oxide is added to the above-mentioned substrate and an alcohol solution of ethyl silicate. A solution having an organic dye and / or a pigment mixed therein is applied to the mixed solution to form a film having a light absorbing property.

Next, a structure in which at least one alcohol solution selected from silicon, zinc, and titanium alkoxides is applied thereon.

In the case of the above structure, since the refractive index of the underlayer is high, an interference effect of light occurs with the low-refractive-index SiO ₂ upper layer formed thereon, and the antireflection performance is further improved.
Further, since the light absorption performance is provided, the reflectance is reduced by the amount of absorbing the internal reflection of external light, so that the contrast is further improved.

As silicon, zinc and titanium alkoxides, ethyl silicate, zinc butoxide, titanium tetra-isopropoxide and the like are preferably used. The film coated with at least one alcohol solution selected from the alkoxides of silicon, zinc, and titanium may be smooth or may have slight irregularities that do not impair the contrast. It doesn't matter.

Coloring agents (light absorbing agents) such as organic dyes differ in light resistance (coloring life) depending on their types and structures, but generally, there are those that fade or discolor with respect to ultraviolet rays or sunlight. In order to prevent this, zinc and titanium alkoxides that absorb ultraviolet rays may be added to the above solution.

In the case of the above-mentioned two-layer structure, each of them is applied individually or until the upper layer is coated, and then dried and fired at once.
The alkoxide of each layer is decomposed to form each oxide.

The contrast C is defined by the equation (1).

[0026]

[Equation 1]

The reflectance of the light absorbing film with respect to air is R ₂ , the total reflectance at all internal interfaces of the film is R ₁ , the transmittance of the film is T, and the brightness of the liquid crystal display device is B (cd / m). ² ) When the brightness of external light is E (cd / m), the contrast C is (2)
Equation (3) can be shown.

Equation (2) shows the case of a transmissive liquid crystal display device, and equation (3) shows the case of a reflective liquid crystal display device.

Note that FIG. 2 is a schematic diagram showing the relationship of reflection at each part of the constituent materials that make up the liquid crystal display device shown in FIG. In this case, double reflection is not considered. The reflectance is intended for diffuse reflection.

[0030]

[Equation 2]

[0031]

[Equation 3]

It can be seen that the contrast increases as the total reflection intensity {R ₁ + (1-R ₁ ) R ₂ T ² } decreases in both the transmission type and the reflection type.

It goes without saying that the image becomes easier to see as the reflectance decreases. In the case of color liquid crystal display,
The emission spectrum wavelength of the backlight other than the three primary colors is selectively absorbed to improve color purity.

As described above, a light absorber is added to the underlayer high refractive index layer or the upper layer low refractive index layer to reduce the transmittance,
As a result, the total reflectance can be lowered to increase the contrast. In the case of the two-layer structure, the reflectance can be further lowered by the interference effect of the light of the underlayer and the light of the upper layer. When the underlying layer is mainly made of tin oxide or indium oxide, it has conductivity, and when it is grounded, it has antistatic properties.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid crystal display device according to the present invention will be described below with reference to the drawings.

FIG. 3 is a developed perspective view showing an embodiment of the liquid crystal display device according to the present invention, in which 62 is a liquid crystal display substrate and 6
2A is a printed circuit board, 62B is a liquid crystal display drive circuit, 63
Is a light guide, 63A is a cold cathode tube, 64 is a cold cathode tube cover,
65 is a support frame, 66 is a tablet board, 67 is a transparent substrate (hard coat glass plate), 68 is a metal frame,
69 is a spacer.

The drawing shows an embodiment in which the liquid crystal display substrate described in FIGS. 1 and 2 is applied to a pen input liquid crystal display device.

In the liquid crystal display device shown in the figure, there is first a liquid crystal display substrate 62, and the periphery of this liquid crystal display substrate 62 (three sides in this figure) is in the same plane as the liquid crystal display substrate 62. A printed circuit board 62A having a letter shape is arranged.

A liquid crystal display drive circuit 62B is arranged at the boundary between the liquid crystal display board 62 and the printed board 62A. The liquid crystal display drive circuit 62B has a structure in which a semiconductor device is mounted on a flexible substrate, for example, and the electrodes formed on the flexible substrate are connected to the respective electrodes of the liquid crystal display substrate 62 and the printed circuit board 62A. ing.

Further, a light guide 63 is arranged on the back surface of the liquid crystal display substrate 62. The light guide 63 has a function of irradiating the back surface of the liquid crystal display substrate 62 with light. That is, a light source composed of a cold cathode tube 63A is arranged on one end surface of the light guide 63, and light from the cold cathode tube 63A enters the light guide 63 through the one end surface to guide the light guide. 63
Is diffusedly reflected from the main surface (the surface facing the liquid crystal display substrate 62).

Therefore, a diffused reflection film is formed on the one end surface of the light guide 63 and the other surface except the main surface, and all the light from the cold cathode tubes 63A is guided to the light guide 63 side. A cold-cathode tube cover 64 for introducing into

The liquid crystal display substrate 62 and the light guide 6 are also provided.
3, there is a support frame 65 in which the cold cathode tube 63A and the cold cathode tube cover 64 are accurately positioned and housed. The support frame 65 has a box shape, and is made of, for example, a synthetic resin, and integrally formed with the support frame 65 to form a locking portion made of, for example, a projection in accordance with the arrangement of the above-mentioned components.

That is, by arranging the parts so that the side end surfaces of the parts come into contact with the locking portions, the parts can be positioned with respect to the support frame 65. The support frame 65 also has a function of a light-shielding cover for introducing all the light from the cold cathode tubes 63A to the light guide 63 side.

Further, a tablet board 66 is arranged on the back surface of the support frame 65. The tablet board 66 detects the position of the stylus when the stylus, which will be described later, is brought close to the coordinates of the tablet board 66, and displays the coordinate position of the liquid crystal display substrate 62 corresponding to the coordinate position. ing. As a result, by tracing the stylus, the locus is displayed as it is on the liquid crystal display substrate 62.

The stylus is traced on the display surface of the liquid crystal display substrate 62. A so-called transparent substrate 67 (hard coat glass) is arranged on the main surface side of the liquid crystal display substrate 62, and this transparent substrate 67 is provided. The stylus is traced directly on the surface. However, since the liquid crystal display substrate 62 has a structure in which, for example, two glass substrates are opposed to each other with a liquid crystal interposed therebetween, the liquid crystal display substrate 6 is
The reason for directly tracing the surface of No. 2 with the stylus is that the unevenness of the liquid crystal is displayed as it is due to the bending of the glass substrate due to the pressurization.

The liquid crystal display substrate 62, the light guide 63, the cold cathode tube cover 64, the support frame 65, the tablet board 66, and the transparent substrate 67 are respectively provided on a pair of side portions in the longitudinal direction of the assembly. A metal frame 68 having a U-shaped cross section is fitted and integrated to form a modularized liquid crystal display device.

Liquid Crystal Display Substrate 62 FIG. 4 is an exploded perspective view showing an embodiment of the constitution and axial constitution of the liquid crystal display substrate, 5 is the optical axis of the uniaxial birefringent member, and 6 is
Is the liquid crystal alignment direction of the upper electrode substrate, 7 is the liquid crystal alignment direction of the lower electrode substrate, 8 is the polarization axis or absorption axis of the upper polarization plate, 9 is the polarization axis or absorption axis of the lower polarization plate, and 10 is the twist direction of the liquid crystal molecules. ,
Reference numeral 11 is an upper electrode substrate, 12 is a lower electrode substrate, 15 is an upper polarizing plate, 16 is a lower polarizing plate, 17 is a semitransparent film (reflection plate), 2
1, 22 are alignment films, 31 is an upper electrode, 32 is a lower electrode, 40
Is a birefringent member, 50 is a liquid crystal layer, 51 is a notch, 52 is a sealant, 60 is a liquid crystal cell, 62 is a liquid crystal display substrate, and 10 is a liquid crystal display substrate.
Reference numeral 0 is a light absorbing film.

In the same figure, in order to align the liquid crystal molecules between the upper and lower electrode substrates 11 and 12 sandwiching the liquid crystal layer 50 so as to have a twisted spiral structure, the upper and lower electrode substrates 11 and 12 must be aligned. A so-called rubbing method, which is a method of rubbing the surfaces of the alignment films 21 and 22 made of an organic polymer resin made of polyimide, for example, in contact with the liquid crystal 12 with a cloth in one direction, is used. The rubbing direction at this time, that is, the rubbing direction, the rubbing direction on the upper electrode substrate 11 and the rubbing direction 7 on the lower electrode substrate 12 are the alignment directions of the liquid crystal molecules.

On the two sheets thus oriented,
The lower electrode substrates 11 and 12 are respectively rubbed in directions 6 and 7
Are opposed to each other with a gap d1 so as to intersect each other at about 180 to 360 degrees.
When a nematic liquid crystal having a positive dielectric anisotropy and having a predetermined amount of an optical rotatory substance is sealed, it is sealed by a frame-shaped sealant 52 having a notch 51 for injecting liquid crystal. The liquid crystal molecules are arranged in a helical structure with a twist angle θ in the figure between the electrode substrates. In addition, 31, 3
Reference numerals 2 are upper and lower electrodes, respectively.

A member (hereinafter, referred to as a birefringent member) 40 for providing a birefringence effect is disposed above the upper electrode substrate 11 of the liquid crystal cell 60 thus configured, and the birefringent member 40 is further provided. Also, upper and lower polarizing plates 15 and 16 are provided with the liquid crystal cell 60 interposed therebetween. In the case of a color liquid crystal display element, the color filter has an upper electrode 31 and an upper electrode substrate 1.
It is provided between 1.

A semi-transparent film 17 is provided under the lower polarizing plate 16 and between the backlight and it functions in both a reflection mode (when the backlight is not lit) and a transmission mode (when the backlight is lit). It is like this.

The figure shows the case where the light absorbing film 100 of the present invention is provided on the outer surface of the upper polarizing plate 15. In the conventional example, the surface of the upper electrode substrate 11 is usually subjected to so-called non-glare treatment for the purpose of preventing reflection of external light.
The contrast and resolution are low. In the case of the present invention, fine irregularities may be slightly coated on the light absorbing film as long as the contrast is not affected.

The light absorbing film of the present invention may be coated on the outer surface of the upper polarizing plate 15 and / or on the outer surface of the transparent substrate 67 shown in FIG.

Transparent Substrate 67 The transparent substrate 67 is a transparent substrate on which writing means is directly traced on the main surface. The transparent substrate 67 is the liquid crystal display substrate 6.
The second display surface is supported with a certain distance. Further, other antireflection treatment may be applied to each interface.

A soft sheet may be attached to the main surface of the transparent substrate in order to improve the writing quality with a writing means (stylus). In the conventional method, the surface of this soft sheet is subjected to so-called non-glare treatment such as silica coating, which has large irregularities. The light absorptive antireflection film of the present invention replaces the silica non-glare film. At this time, as described above, fine unevenness is applied to the outermost surface of the film in a slightly thin manner within a range that does not affect the contrast to improve the writing feel and to reduce the impact of the pen (stylus). You can also

Next, the light-absorbing antireflection film 100 of the present invention.
A method of forming the will be described.

(Film Forming Substrate) The film forming substrate may be a glass plate, a plastic plate or a plastic film. As the plastic material, the main components are, for example, polyethylene, polypropylene, urethane, acrylic, phenol, epoxy, melanin, nylon,
Examples thereof include polyimide, polycarbonate, butyl, epoxyphenol, vinyl chloride, polyester and the like.

The surface of the substrate on which the light absorptive antireflection film is formed may have a curvature as well as a flat plate.

(Pretreatment) Considering the wettability with the substrate, pretreatment such as alkali treatment or fluorine treatment is preferable.
Further, in the case of a plastic substrate, pretreatment with a neutral detergent or the like is effective.

(Coating Method) Spin coating method, spraying method, dipping method or a combination thereof is used.

(Coating Solution) In order to form the light-absorbing antireflection film of this example, a predetermined amount of organic dye and / or pigment, and 2
In the case of a layered structure, a coating solution obtained by adding a binder, a solvent, a coupling agent, if necessary, and other additives to at least one kind of ultrafine particles selected from tin oxide, indium oxide, titanium oxide and antimony oxide. To use.

When the film-forming substrate is a glass body, it is desirable to use Si (OR) ₄ as a binder (provided that R may be an alkyl group, or Ti and Zn in addition to Si). When the forming substrate is plastics, it is preferable to use Si (OR) _X (where X is 2 to 4, preferably 3, Si and Ti and Zn may be contained in addition to Ti) as a binder. Further, when the film-forming substrate is plastics, it is desirable to use a coupling agent having a functional group for the plastics material together.

When the film-forming substrate is a glass body, Si (O)
(R) is dissolved in an alcohol solution and a functional group that easily reacts with the polymer and Si (OR) X (where X is 2 to 4, preferably 3) when the film-forming substrate is plastics. Owned silane coupling agent or Si (OR)
A predetermined amount of an organic dye and / or pigment is dissolved in an alcohol solution in which a mixed solution of silane and a silane coupling agent is dissolved, and in the case of a two-layer structure, tin oxide, indium oxide, titanium oxide and antimony oxide are selected. At least 1
Disperse the seed ultrafine particles.

By adding a small amount of H ₂ O and an acidic catalyst to the above solution, the decomposition of the binder can be promoted and the film-forming property and the caking property can be improved.

Many organic dyes can be used as the organic dye used in this embodiment. That is, azo dyes, anthraquinone dyes, indigoid dyes, phthalocyanine dyes, carbonium ion dyes, and other dyes can be used.

Inorganic pigments used in this example include oxides, hydroxides, carbon black, chromic acid, carbonates, silicates, phosphates, ferrocyanides, and metal powders. As an organic system, azo pigment, phthalocyanine,
Condensed polycyclic pigments and other pigments can be used.

The kind and addition amount of these colorants (light absorbers) are determined according to the intended color tone and light absorption performance.

The thus-prepared solution for forming a colored antistatic film having a light-absorbing property is applied to the film-forming substrate at room temperature or at a temperature of 60 ° C. or lower. This application is
It is carried out by a spin coating method, a spraying method, a dipping method or a combination thereof.

After coating on the surface of the film-forming substrate, in order to cure the coating film, the coating surface is coated at 100 ° C to 200 ° C.
It is desirable to heat at C. However, since the decomposition of the binder gradually proceeds even at room temperature, the heat treatment may be performed within the allowable temperature range of each member. In the case of a two-layer structure, heating may be performed together before the second layer is applied or after the second layer is applied.

FIG. 5 is an explanatory view showing the structure of the light-absorptive antireflection film according to the present invention and the characteristics of a liquid crystal display device to which it is applied in comparison with a conventional example.

In the figure, Conventional Example 1 is an example of a non-glare film formed by a normal silica spray for comparison, and has a low contrast of 10 because it does not have a light absorbing property and a diffuse reflection preventing property.

On the other hand, Examples 2 to 4 of the present invention, which are examples of the present invention, have both the light absorption performance and the diffuse reflection prevention performance, so that the contrast is large and the image sharpness is high. A high-performance liquid crystal display device can be obtained. In particular, since the invention examples 3 and 4 have a two-layer structure, they are antireflection films utilizing the interference of light, so that the reflectance R
₁ is very small, and the contrast is specific example 1
It is improved by 2 to 2.5 times compared with.

Further, in the invention examples 3 and 4, the surface resistance value is 1
0 ⁸ Ω / □ or less, and has antistatic properties.

Further, as another embodiment of the present invention, the light absorption performance may be a wavelength selective absorption property, in which case unnecessary light from the backlight is cut off to obtain a clearer high-purity color tone. can get.

[0075]

As described above, according to the present invention,
A liquid crystal capable of effectively suppressing reflection of extraneous light, improving display quality such as visibility of a display image, contrast, and color vividness, and capable of being manufactured at low cost. A display device and a manufacturing method thereof can be provided.

[Brief description of drawings]

FIG. 1 is a schematic sectional view illustrating a basic configuration of a liquid crystal display device according to the present invention.

FIG. 2 is a schematic diagram showing a reflection relationship of each part of the constituent material that constitutes the liquid crystal display device shown in FIG.

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

FIG. 4 is an exploded perspective view showing an example of a configuration and a shaft configuration of a liquid crystal display substrate.

FIG. 5 is an explanatory diagram showing a structure of a light-absorbing antireflection film according to the present invention and characteristics of a liquid crystal display device to which the film is applied in comparison with a conventional example.

FIG. 6 is a cross-sectional view schematically showing the configuration of a conventional liquid crystal display device coated with silica spray.

[Explanation of symbols]

 11 Upper Electrode Substrate 12 Lower Electrode Substrate 15 Upper Polarizing Plate 16 Lower Polarizing Plate 17 Semitransparent Film (Reflector) 40 Birefringent Member 50 Liquid Crystal Layer 52 Sealing Agent 60 Liquid Crystal Cell 62 Liquid Crystal Display Substrate 63 Light Guide 62A Printed Substrate 62B Liquid Crystal Display drive circuit 63A Cold cathode tube 64 Cold cathode tube cover 65 Support frame 66 Tablet board 67 Transparent substrate (hard coat glass plate) 68 Metal frame 69 Spacer 100 Light absorbing film.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshige Kinugawa 3300 Hayano, Mobara-shi, Chiba Hitachi, Ltd. Electronic Device Division

Claims (3)

[Claims] 1. An upper electrode substrate, a lower electrode substrate, and
A liquid crystal display device comprising at least a liquid crystal, an alignment film, an upper polarizing plate and a lower polarizing plate, wherein at least one alcohol solution selected from alkoxides of silicon, zinc and titanium is provided on the outer surface of the liquid crystal display device. A liquid crystal display device, wherein a film having a light absorbing property formed by coating a solution in which at least one of an organic dye and a pigment is mixed is provided. 2. An upper electrode substrate, a lower electrode substrate, and
In a liquid crystal display device having at least a liquid crystal, an alignment film, an upper polarizing plate and a lower polarizing plate, tin oxide, indium oxide,
A composition having a light-absorbing property by applying a solution prepared by mixing at least one selected from titanium oxide and antimony oxide and an alcohol solution of ethyl silicate with at least one of an organic dye and a pigment. The first layer film having a refractive index larger than that of the material and at least one alcohol solution selected from silicon, zinc, and titanium alkoxides are applied to form the first layer film.
A surface treatment film having at least a second layer having a smaller refractive index than that of the layer film, and having a light absorption performance and an antireflection performance due to light interference of two layers including the first layer and the second layer. Characteristic liquid crystal display device. 3. An upper electrode substrate, a lower electrode substrate, and
In a method of manufacturing a liquid crystal display device having at least a liquid crystal, an alignment film, an upper polarizing plate and a lower polarizing plate, tin oxide, indium oxide,
A composition having a light-absorbing property by applying a solution prepared by mixing at least one selected from titanium oxide and antimony oxide and an alcohol solution of ethyl silicate with at least one of an organic dye and a pigment. The step of forming a first layer film having a refractive index higher than that of the material, and applying at least one alcohol solution selected from silicon, zinc, and titanium alkoxides thereon, Second having a smaller refractive index than the layer film
A method for manufacturing a liquid crystal display device, which comprises at least a step of forming a layer film, and which comprises providing a surface-treated film having a light absorption property and an antireflection property due to interference of two layers of light.