JP2002122872A - Liquid crystal display device and manufacturing method thereof - Google Patents

Abstract

(57) [Problem] To use a photocurable resin composition as a sealing material, take no time for injecting liquid crystal, extremely small displacement and gap variation between two substrates, Provided is a novel high-reliability liquid crystal display device having good alignment characteristics of a liquid crystal, which is formed with no dust and without damaging an alignment film on an electrode substrate, and a method of manufacturing the same. A photocurable sealing material is disposed on at least one of two opposing electrode substrates with an alignment film, and spacers are sprayed and fixed on one of the electrode substrates. The required amount of liquid crystal is dropped, and the above 2
After stacking the two electrode substrates, the sealing material is irradiated with light having a wavelength of 350 nm or more at normal pressure and bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device used as a thin, lightweight, low power consumption display and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices have been used in various fields as thin, lightweight, and low power consumption displays.
In the future, the usage will increase.

Conventionally, the production of a liquid crystal display device requires a long time in the process using the thermosetting sealing material shown in Table 1.

[0004]

[Table 1]

At present, attempts are being made to improve the process in a short time using the photocurable sealing material shown in Table 1. In particular, as shown on the right side of Table 1, a short-time process of sealing in the presence of liquid crystal using a photocurable sealing material is expected.

As a method of manufacturing a liquid crystal display device, the following method has been conventionally proposed.

(1) As shown in FIGS. 1A and 1B,
A thermosetting epoxy-based seal is maintained while pressing the two opposing electrode substrates 2 provided with an alignment film having an alignment film 1 (mainly made of polyimide) on the innermost side while maintaining a constant distance by a spacer 3. The liquid crystal 5 is injected into the container made by curing and bonding the material 4 by vacuum or pressure through a liquid crystal injection port 6 provided in advance in the sealing portion, and the liquid crystal injection port 6 is sealed so that the liquid crystal 5 does not leak. A method of sealing using a sealing material 7 made of a thermosetting epoxy resin or an ultraviolet curing acrylic resin.

(2) The method of (1) above, wherein an ultraviolet-curable epoxy resin or an ultraviolet-curable acrylic resin is used as the sealing material 4 and an ultraviolet-curable acrylic resin is used as the sealing material 7.

(3) As shown in FIGS. 2A to 2D, a sealing material 10 is arranged on at least one of two opposing electrode substrates 8 and 9 with an alignment film, and a liquid crystal 12 is placed on the electrode substrate 8. A method in which a predetermined amount is dropped and the two electrode substrates 8 and 9 are bonded in a vacuum.

(4) As shown in FIGS. 3A to 3E, a sealing material 1 in which a liquid crystal outlet 15 is provided in advance on at least one of two opposing electrode substrates 13 and 14 with an alignment film.
6, the liquid crystal 18 is dropped on the electrode substrate 13 in a required amount or more, the two electrode substrates are bonded together in a vacuum, excess liquid crystal is discharged, and the liquid crystal discharge port 15 is formed using a sealing material 19. And sealing.

[0011]

However, in the above methods (1) and (2), since the inlet is in contact with the liquid crystal, troubles are liable to occur on the display panel due to contamination of the liquid crystal or dust. Further, there is a disadvantage that it takes a long time to inject the liquid crystal.

In the methods (3) and (4), as described in JP-A-62-89025 and JP-A-6-235925, the methods (1) and (2) Although measures to solve the problem of the method are sufficient, almost no mention is made of the sealing material. As a sealing material, an ultraviolet curable resin is more effective than a thermosetting resin from the viewpoint of improving the productivity of the liquid crystal display device, the displacement between the two substrates, and improving the gap variation.

However, no matter which sealing material is used, the viscosity of the sealing material at 25 ° C. is too low to allow the sealing material to flow to the liquid crystal side to obtain a target display screen, or the viscosity at 25 ° C. is too high. There is a big problem that the gap is too short and the gap is insufficient. In addition, if an ultraviolet-curing resin is used as the sealing material, the alignment film on the electrode substrate of the liquid crystal display device which was irradiated with ultraviolet light during curing is damaged. Accordingly, there has been a great problem that the alignment characteristics of the liquid crystal are impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it does not take much time to inject a liquid crystal.
A liquid crystal made with very small displacement and gap variation between the two substrates, no liquid crystal contamination or dust contamination, sufficient display screen and gap setting, and without damaging the alignment film on the electrode substrate. It is an object of the present invention to provide a novel highly reliable liquid crystal display device having good alignment characteristics and a method for manufacturing the same.

[0015]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have conducted intensive studies, and as a result, as shown in FIGS. A sealing material 10 is provided on at least one of the two electrode substrates 8 and 9 having an alignment film.
Is disposed, and a required amount of liquid crystal 12 is dropped on the electrode substrate 8. When the two electrode substrates 8 and 9 are bonded together in a vacuum, the sealing material 10 has a viscosity of 40 to 100 Pa · s at 25 ° C. and a radical polymerization type. Acrylic photocurable resin composition and / or
Alternatively, an en / thiol-based photocurable resin composition is used to irradiate light having a wavelength of 350 nm to 780 nm, or is cured by irradiating ultraviolet light that does not limit the wavelength by blocking the alignment film surface with a mask material and bonding and fixing. By doing so, a liquid crystal display device satisfying the above-mentioned problems was obtained, and the present invention has been achieved.

In order to increase the adhesiveness between the electrode substrates 8 and 9 with an alignment film, an adhesion promoter can be provided in the composition as the sealing material 10.

The light source used in the present invention has a wavelength of 780.
Mercury lamps, xenon lamps, metal halide lamps, and the like that generate a large amount of visible light and ultraviolet light of nm or less are useful. Light rays generated from these light sources may unnecessarily heat the liquid crystal display element or cause light deterioration of the liquid crystal.

During the photocuring of the above composition, a method is devised so that a light beam hits only the composition. Irradiation time is generally 0.1 to
5 minutes. That is, if the time is shorter than 0.1 minute, the photocurability becomes insufficient, and the adhesiveness is poor. If the time is longer than 5 minutes, it is unproductive and disadvantageous.

Here, the wavelength of the light from the light source is 350
The alignment film is damaged by short wavelength light of 780 nm or less.
In the case of long-wavelength light of m or more, since the curing reaction is slow and unproductive, light having a wavelength of 350 nm to 780 nm is preferable.

As an irradiation method, ultraviolet light is irradiated through a cut filter (for blocking light having a wavelength of 350 nm or less). In addition, when the alignment film surface on the electrode substrate is light-shielded by a mask material such as a metal plate painted black to cure the composition and bond and fix the two electrode films with alignment film, a cut filter is used. UV light can be used directly without passing through.

A sealing material is disposed on at least one of two opposing electrode substrates with an alignment film, that is, a thin film transistor (TFT), a substrate with a color filter, and a substrate with a transparent conductive film. After the spacers are scattered and fixed, a required amount of liquid crystal is dropped on the electrode substrate on which the sealing material is disposed, and the two electrode substrates are bonded together in a vacuum to form a liquid crystal display device.

In addition, in the present invention, 2
A radical polymerization type acrylic photocurable resin composition having a viscosity of 5 to 40 Pa · s at 5 ° C. is based on a (meth) acrylic resin to which a photosensitizer is added, and if necessary, It contains an adhesion promoter (such as a silane coupling agent) and a filler for the purpose of improving properties.

The viscosity of the sealing material at 25 ° C. is 40.
If the pressure is lower than Pa · s, the sealing material flows to the liquid crystal side and a target display screen cannot be obtained, and the viscosity at 25 ° C. becomes 100 Pa · s.
If it is higher, the gap is insufficient and display unevenness occurs, so that a sealing material having a viscosity at 25 ° C of 40 to 100 Pa · s is effective (however, the viscosity of the liquid crystal at 25 ° C is 0.001 to 0.1 Pa). -S).

The (meth) acrylic resin is not particularly limited as long as it contains at least one (meth) acrylic group in one molecule and can be cured at a high speed by radical polymerization.

However, the molecular skeleton of the (meth) acrylic resin is preferably polyester, polyether, hydrocarbon, silicone or the like in order to improve the moisture proof property, adhesive property, incompatibility with liquid crystal, and the like.

Examples of the (meth) acrylic resin include those having (meth) acrylic groups attached to both ends of a molecular skeleton, for example, polyesters obtained from adipic acid and ethylene glycol, polyethylene glycol, bisphenol A
Examples thereof include di (meth) acrylates such as diglycidyl ether, poly-1,2-butadiene, and polydimethylsiloxane, hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, and butanediol di (meth) acrylate.

For the purpose of lowering the viscosity and adjusting the glass transition temperature, a (meth) acryl compound containing one (meth) acryl group in one molecule, for example, 2-ethylhexyl (meth) acrylate, 2-hydroxypropyl (Meth) acrylate, lauryl (meth) acrylate, decyl (meth) acrylate, benzyl (meth) acrylate, or the like may be used. In addition, 2
-Hydroxyethyl (meth) acrylate may be used.

The photosensitizer used in the present invention is not particularly limited as long as it undergoes photolysis or hydrogen abstraction reaction by light having a wavelength in the visible to ultraviolet range to generate radicals and initiate radical polymerization by (meth) acrylic groups. There is no.

Examples of the photosensitizer include benzoin ethers such as benzoin isopropyl ether, 2, 2
Acetophenones such as diethoxyacetophenone,
1-hydroxycyclohexyl phenyl ketone, 2
-Hydroxy-2-methyl-1-phenylpropan-1-one, benzoin, benzophenones such as p-methoxybenzophenone, xanthones such as thioxanthone, m-chloroacetophenone, propiophenone, benzyl, 2-methylanthraquinone and the like Anthraquinones, benzyldimethyl ketal and the like are useful.

The amount of the photosensitizer to be used is preferably 0.01 to 5 parts by weight based on 100 parts by weight of the (meth) acrylic resin. When the amount is less than 0.01 part by weight, the photocurability of the acrylic resin composition is poor, and when the amount is more than 5 parts by weight, the adhesiveness is reduced.

The adhesion promoter improves the adhesive properties of the resin composition according to the present invention. In addition to the silane coupling agent and the titanium coupling agent, polychloroprene, poly-1,4-butadiene, styrene. Examples include butadiene copolymers, acrylonitrile / styrene / butadiene copolymers, and graft copolymers of rubbers such as ethylene / propylene rubbers and (meth) acrylic resins.
The amount of the adhesion promoter used is (meth) acrylic resin 100
It is preferably 0.1 to 10 parts by weight based on part by weight. 0.1
If the amount is less than parts by weight, the effect of promoting adhesion is not sufficiently exhibited. If the amount is more than 10 parts by weight, the excess adhesion promoter in the acrylic resin composition flows out into the liquid crystal layer, adversely affects the orientation of the liquid crystal, and lowers the glass transition temperature.

The filler is used to improve the coatability of the resin composition according to the present invention, adjust the viscosity of the composition and the coefficient of thermal expansion of the cured product, and prevent the solubility in liquid crystals. Calcium carbonate or the like can be used. The amount of the filler used is such that the viscosity of the sealing material at 25 ° C. is 40 to 100 Pa.
-(Meth) acrylic resin 100 within a range satisfying s
The amount is preferably 5 to 100 parts by weight based on parts by weight. If the amount is less than 5 parts by weight, the effect is insufficient, and if it is more than 100 parts by weight, the adhesiveness of the acrylic resin composition is reduced.

The ene / thiol-based photocurable resin composition used in the present invention is basically composed of a polyene compound and a polythiol compound with a photosensitizer added thereto. It contains an adhesion promoter (such as a silane coupling agent) and a filler.

The polyene compound contains two or more carbon-carbon unsaturated double bonds (C ＝ C) in one molecule, and the polythiol compound also contains two or more mercapto groups (—SH) in one molecule. There is no particular limitation on both compounds as long as they can be cured at a high speed by radical polymerization. As polyene compounds, divinylbenzene, divinyltoluene, triallyl cyanurate, triallyl isocyanurate, tetraallyloxyethane, trimethylolpropane diallyl ether, trimethylolpropane triallyl ether, pentaerythritol diallyl ether, pentaerythritol triallyl ether, Pentaerythritol tetraallyl ether, ethylene glycol di (meth) allyl ether, propylene glycol di (meth) allyl ether, butylene glycol di (meth) allyl ether, polyethylene glycol di (meth) allyl ether, polypropylene glycol di (meth) allyl ether , Polybutylene glycol di (meth) allyl ether, ethylene oxide and propylene oxide Or random copolymers di (meth) allyl ether polymer and a glycol, di (meth) allyl ethers of glycol is a block or random copolymer of ethylene oxide and tetrahydrofuran,
Examples include, but are not limited to, di (meth) allyl ether of bisphenol A, di (meth) allyl ether of (poly) ethylene oxide-modified bisphenol A, and di (meth) allyl ether of (poly) propylene oxide-modified bisphenol A It is not something to be done. Also,
A mixture of two or more of these may be used.

Examples of polythiol compounds include diglycol dimercaptan, triglycol dimercaptan, tetraglycol dimercaptan, thiodiglycol dimercaptan, thiotriglycol dimercaptan, thiotetraglycol dimercaptan, and excess polythiol compound. And a polythiol compound obtained by reacting the following mercapto group with an epoxy group of the following polyepoxide compound. However, the present invention is not limited thereto. Further, a mixture of two or more of these may be used.

Examples of polyepoxide compounds include bisphenol A type epoxide, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether,
Neopentyl glycol diglycidyl ether, 1, 6
-Hexanediol diglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl ether, trimethylolpropane diglycidyl ether, trimethylolpropane triglycidyl ether,
Diglycerol polyglycidyl ether, bisphenol S type epoxide, bisphenol F type epoxide, hydrogenated bisphenol A type epoxide, etc.
It is not limited to these. Further, a mixture of two or more of these may be used.

The mixing ratio of the polyene compound and the polythiol compound used in the composition of the present invention is determined by the molar ratio between the carbon-carbon unsaturated double bond of the polyene and the mercapto group of the polythiol, and the ratio is 1: 1.5. １．５1.5: 1, preferably 1: 1.2-1.2: 1, most preferably approximately 1: 1. If the compounding ratio of the polyene compound and the polythiol compound is out of the above range, problems may occur such as an unusual odor after curing, or the hardness of the cured product is too low. The photosensitizer used in the present invention may be used in the acrylic photocurable resin composition, and the amount of the photosensitizer is 0.01 to 5 parts by weight based on 100 parts by weight of the total of the polyene compound and the polythiol compound. Parts are preferred. When the amount is less than 0.01 part by weight, the photocurability of the ene / thiol-based photocurable resin composition is poor. When the amount is more than 5 parts by weight, the adhesiveness is reduced.

The adhesion promoter for improving the adhesive properties of the resin composition may be the same as that used for the acrylic photocurable resin composition, and may be any of silane coupling agents, titanium coupling agents and the like. , Polychloroprene,
Examples include poly-1,4-butadiene, styrene / butadiene copolymer, acrylonitrile / styrene / butadiene copolymer, and graft copolymers of rubbers such as ethylene / propylene rubber and (meth) acrylic resin.
The amount of the adhesion promoter used is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the total of the polyene compound and the polythiol compound. If the amount is less than 0.1 part by weight, the effect of promoting adhesion is not sufficiently exhibited. If the amount is more than 10 parts by weight, the excess adhesion promoter in the ene / thiol-based resin composition flows into the liquid crystal layer, adversely affects the orientation of the liquid crystal, and lowers the glass transition temperature.

The filler for improving the coatability of the resin composition, adjusting the viscosity of the composition, the coefficient of thermal expansion of the cured product, and the like, and preventing the solubility in liquid crystals is also the same as that of the acrylic photocurable resin composition. It may be the same as that used for the product, and silica, alumina, calcium carbonate, and the like can be used. The amount of the filler used is such that the viscosity of the sealing material at 25 ° C. is 40 to 100 Pa.
-As long as s is satisfied, the content is preferably 5 to 100 parts by weight based on 100 parts by weight of the total of the polyene compound and the polythiol compound. If the amount is less than 5 parts by weight, the effect is insufficient, and if it is more than 100 parts by weight, the adhesion of the ene / thiol-based resin composition decreases.

Further, an antifoaming agent, a leveling agent, a polymerization inhibitor and the like may be added to the resin composition of the present invention, if necessary.

Hereinafter, an example of a method for producing a liquid crystal display device using the resin composition of the present invention will be described. A sealing material of the resin composition of the present invention is applied on a surface of one of the two electrode substrates with an alignment film on the alignment film side so as to form a square-shaped pattern. The application method is generally a screen printing method, but may be applied using a dispenser.

A required constant amount of liquid crystal is dropped at the center of the square-shaped pattern on the substrate coated with the sealing material.

The two substrates are aligned with spacers in vacuum with the respective alignment film surfaces inside, and the gap between the substrates is adjusted to a desired interval while returning to normal pressure.

Next, according to the method of the present invention, the resin composition is irradiated with light in a predetermined wavelength region (350 nm to 780 nm) or the alignment film surface in a state where the alignment and the gap setting are completed. The above resin composition is cured by irradiating only the light with a mask material and irradiating ultraviolet light, and the two substrates are bonded and fixed to each other to produce a liquid crystal display device.

[0045]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

The composition and composition No. of the photocurable resin composition of the sealing material used for bonding and fixing the two electrode substrates with an alignment film were determined.
Are shown in Table 2.

[0047]

[Table 2]

Here, the composition No. 1 to No. No. 6 is an acrylic radical polymerization type photocurable resin composition; 7
-No. No. 12 is an ene / thiol radical polymerization type photocurable resin composition; 13-No. Reference numeral 15 denotes an acrylic radical polymerization type photo-curable resin composition, each of which has a viscosity at 25 ° C. outside the range of the invention. However, the viscosity was measured with a rotational viscometer.

As shown in FIG. 2, the resin composition (sealant) is applied onto one of the electrode substrates 8 with an alignment film using a dispenser so as to form a square-shaped pattern 10, and is applied to the center of the pattern. Then, a required amount of the liquid crystal 12 is dropped.
6.5 μm in the screen area on the other electrode substrate 9 with an alignment film
A bead-shaped spacer 11 having a diameter is sprayed.

The two electrode substrates are aligned with the respective alignment film surfaces inward via spacers in a vacuum, and the gap between the substrates is adjusted to a desired interval while returning to normal pressure.

Next, according to the method of the present invention, FIG. 4 and FIG.
As shown in the figure, the sealing material 22 is irradiated with light under a predetermined condition.
And 29 were cured.

That is, FIG. 4 shows the wavelength 350n of the present invention.
Using a colored glass filter UV-35 (manufactured by Toshiba Glass Co., Ltd.) as a cut filter 25 for blocking light of m or less, the light from a light source 26 of a high-pressure mercury lamp is irradiated with light of a limited wavelength, and the resin composition is irradiated with light. The method of curing is shown. FIG. 5 shows that the mask material 32 of the present invention has a thickness of about 2 mm.
A method of photo-curing the above resin composition using a black painted metal aluminum plate, light-shielding the alignment film surface, irradiating all the light from the light source 33 of the high-pressure mercury lamp without limiting the wavelength.

With respect to the liquid crystal display device 35 obtained by curing as described above, whether the display screen is good or not is visually observed as a characteristic.

Next, a method for evaluating the alignment characteristics of the liquid crystal display device 35 obtained above using the polyimide alignment film 34 will be described with reference to FIG.
It was shown to.

That is, the polarization directions of the two polarizing plates 39 are orthogonal to each other, the liquid crystal display device 35 is sandwiched between them, one side is directed to the direction of the light 40, and the other is viewed with the eyes 41 from the other side.

When the light looks uniform without any alignment disturbance,
This shows that the alignment film 34 of the liquid crystal display device 35 is not damaged and the alignment characteristics are good.

On the other hand, when the light looks non-uniform, it indicates that the alignment film 34 is damaged and the alignment characteristics are poor.
As another property, adhesion was required. The presence or absence of peeling of the sealing material is visually observed, and a liquid crystal display device in which no peeling is observed has good adhesiveness, and a liquid crystal display in which peeling is visible indicates poor adhesiveness.

In addition, the alignment characteristics and the adhesiveness of the liquid crystal display device were determined not only in the initial stage but also in a high-temperature storage test (60 ° C.).
C., 1000 hours) and a high temperature and high humidity test (70 ° C., 95 hours)
% RH, 500 hours).

Using the photocurable resin composition (sealant) having the composition shown in Table 2, curing conditions were changed, and the above characteristics of the liquid crystal display were examined. The results are shown in Table 3.

[0060]

[Table 3]

Here, for example, the embodiment No. 1 is Table 2
No. 1 to No. The six types of resin compositions up to 6 were separately provided with a cut filter and under a light irradiation condition of 100 mW /
All six types of liquid crystal display devices made in cm ² (wavelength 365 nm) × 90 seconds are shown. The symbol １ in the characteristic 1 indicates that the characteristics of all the above six types of liquid crystal display devices are good.

From Table 3, it can be seen that Example No. 1 to No. 6 is
Since the viscosity at 25 ° C. of the resin composition before photocuring satisfies the range of the invention, the display screen of the liquid crystal display device is good, and the cut filter or mask material of the present invention is provided at the time of photocuring. It can be seen that regardless of the conditions, the alignment characteristics and the adhesiveness of the liquid crystal display device are good both in the initial stage and after the reliability test.

On the other hand, in Comparative Example No. 7-No. 12, since the viscosity at 25 ° C. of the resin composition before photocuring satisfies the range of the invention, the display screen of the liquid crystal display device is good,
In addition, since neither the cut filter nor the mask material of the present invention was used at the time of photocuring, the adhesiveness of the liquid crystal display device was good, but the orientation characteristics were poor from the beginning.

In Comparative Example No. 13-No. 15 is
Since the cut filter of the present invention is provided at the time of photocuring, the alignment properties and adhesion of the liquid crystal display device are good both at the initial stage and after the reliability test, but the viscosity at 25 ° C. of the resin composition before the photocuring is within the range of the invention. It can be seen that the display screen of the liquid crystal display device is defective due to the deviation.

Further investigations were carried out, and Example No.
1 to No. In the liquid crystal display device of No. 6, it was found that all necessary characteristics such as electric characteristics other than those described above were good both in the initial stage and after the reliability test.

The gap accuracy and the position accuracy of the liquid crystal display device were determined by using a thermosetting epoxy sealing material as shown in FIG.
In the method (conventional method), (6.5 ± 0.5)
μm and 6.0 μm, but in the method of the present invention (Examples Nos. 1 to 6 in Table 3), (6.5 ±
0.2) μm and 2.0 μm, indicating that the accuracy is improved.

On the other hand, a thin film transistor (TF)
T) and a liquid crystal display device in which an electrode substrate with an alignment film having a color filter and an electrode substrate with an alignment film having a transparent conductive film on the other side face the alignment film surface inward. In Examples No. 1 to No. 6), it was clarified that the transparent conductive film can be formed by irradiating light from the transparent conductive film side.

[0068]

As described above, the present invention has solved the drawbacks of the prior art, and the liquid crystal display device of the present invention does not require much time for liquid crystal injection and the displacement between the two substrates. In addition, the gap variation was very small, the liquid crystal was not contaminated, dust was not mixed, the alignment film on the electrode substrate was not damaged, and the alignment characteristics of the liquid crystal were good. By applying the present invention, an inexpensive and highly reliable liquid crystal display device can be manufactured.

[Brief description of the drawings]

FIG. 1 is a schematic view of a liquid crystal display device according to a conventional invention.

FIG. 2 is a schematic diagram of a liquid crystal display device according to the present invention.

FIG. 3 is a schematic view of a liquid crystal display device according to a conventional invention.

FIG. 4 is a view illustrating a resin composition curing method according to the present invention.

FIG. 5 is a view showing a resin composition curing method according to the present invention.

FIG. 6 is a diagram showing a method for evaluating the alignment characteristics of the liquid crystal display device according to the present invention.

[Explanation of symbols]

1,20,27,34 ... alignment film, 2,8,9,13,1
4. Electrode substrate with alignment film, 3, 11, 17, 23, 3
0, 37: spacer, 4: thermosetting epoxy sealing material, 5, 12, 18, 24, 31, 38: liquid crystal, 6: liquid crystal injection port, 7, 19: sealing material, 10, 16, 22, 2
9, 36: sealing material, 15: liquid crystal discharge port, 21, 28,
35: liquid crystal display device, 25: cut filter, 26,
33: light source, 32: mask material, 39: polarizing plate (2 sheets),
40 ... light (visible light etc.), 41 ... eye.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ryoichi Sudo 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in Hitachi, Ltd. Production Research Laboratory 2H089 LA07 MA04Y NA09 NA22 NA25 NA35 NA39 NA44 NA49 PA16 QA12 QA13 TA02 TA04 TA09 4J011 PA45 PA76 PC02 PC08 QA03 QA19 QA20 QA26 QA27 QA34 QA46 RA10 RA11 RA17 SA01 SA21 SA31 SA41 SA63 SA64 TA04 UA01 UA06 VA01 WA01 5G435 AA17 BB12 HH20 KK05

Claims (18)

[Claims] 1. An electrode substrate on which a photocurable sealing material is disposed on at least one of two opposing electrode substrates with an alignment film, and spacers are dispersed and fixed on one of the electrode substrates, and then the sealing material is disposed. A liquid crystal display device comprising: dropping a required amount of liquid crystal onto a substrate; laminating the two electrode substrates in a vacuum; and irradiating the sealing material with light having a wavelength of 350 nm or more at normal pressure to bond the substrates. 2. A sealing material having a viscosity at 25 ° C. of 40 to 40.
2. The method for manufacturing a liquid crystal display device according to claim 1, wherein a radical polymerization type photocurable resin composition of 100 Pa · s is applied, and a light source having a wavelength of 350 nm to 780 nm is irradiated to cure the seal material. . 3. An acrylic photo-curable resin composition is applied as a radical polymerization type photo-curable resin composition as a sealing material, the alignment film surface is shielded from light with a mask material, and irradiated with ultraviolet light. 3. The sealing material is light-cured.
The manufacturing method of the liquid crystal display device according to the above. 4. An acrylic photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealing material, and is passed through a cut filter (for blocking light having a wavelength of 350 nm or less). 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is photocured by irradiating ultraviolet light. 5. An en / thiol-based photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealant, and the alignment film surface is shielded from light with a mask material and irradiated with ultraviolet light. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is light-cured. 6. An en / thiol-based photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealing material, and a cut filter (for blocking light having a wavelength of 350 nm or less) is applied. Irradiate the ultraviolet light passed through,
3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is light-cured. 7. An acrylic and ene / thiol-based mixed photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealing material, and the alignment film surface is light-shielded by a mask material, and ultraviolet light is applied. 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is photocured by irradiating light. 8. An acrylic and ene / thiol mixed photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealing material, and a cut filter (for blocking light having a wavelength of 350 nm or less). 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is light-cured by irradiating ultraviolet light passed through the sealing material. 9. An acrylic photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealant, and the alignment film surface is light-shielded by a mask material, and ultraviolet rays are irradiated. 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is photocured by irradiating light. An acrylic photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealant, and a cut filter (for blocking light having a wavelength of 350 nm or less). 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is light-cured by irradiating ultraviolet light passed through the sealing material. 11. An en / thiol-based photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealing material, and the alignment film surface is blocked with a mask material. 3. The method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is light-cured by irradiating ultraviolet light. 12. An en / thiol-based photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealant, and a cut filter (blocks light having a wavelength of 350 nm or less). 3. A method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is photocured by irradiating ultraviolet light passed through the sealing material. 13. An acrylic and ene / thiol-based mixed photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealant, and the alignment film surface is masked. 3. The sealing material is photo-cured by irradiating ultraviolet light with light shielding.
The manufacturing method of the liquid crystal display device according to the above. 14. An acrylic and ene / thiol-based mixed photocurable resin composition containing an adhesion promoter is applied as a radical polymerization type photocurable resin composition as a sealing material, and the cut filter (wavelength: 350 nm or less) 3. A method for manufacturing a liquid crystal display device according to claim 2, wherein the sealing material is photo-cured by irradiating ultraviolet light that has passed through the sealing material. 15. The two opposing electrode substrates with an alignment film, one of which has a thin film transistor (TFT) and a color filter, and the other has a transparent conductive film. Liquid crystal display device. 16. A sealing material having a viscosity of 40 ° C. at 25 ° C.
The manufacturing method of a liquid crystal display device according to claim 15, wherein a radical polymerization type photocurable resin composition of 100 to 100 Pa · s is applied, and light of a wavelength of 350 nm to 780 nm is irradiated as a light source to cure the sealing material. Method. 17. An acrylic photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealant, the alignment film surface is blocked with a mask material, and irradiated with ultraviolet light. The method for manufacturing a liquid crystal display device according to claim 15, wherein the sealing material is light-cured. 18. An acrylic photocurable resin composition is applied as a radical polymerization type photocurable resin composition as a sealant, and is passed through a cut filter (for blocking light having a wavelength of 350 nm or less). The method for manufacturing a liquid crystal display device according to claim 15, wherein the sealing material is photocured by irradiating ultraviolet light.