JPH10123543A - Liquid crystal display panel and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display panel which prevents build-up after curing of a UV curing resin applied at a liquid crystal injection part and is improved in the reliability of sealing degree in this liquid crystal injection part. SOLUTION: A leaf-like member 6 coated with the UV curing resin 5 on one surface is pressed to a liquid crystal injection hole 3 in the state that the surface coated with the UV curing resin 5 faces the liquid crystal injection hole 3 right after liquid crystals are packed via the liquid crystal injection hole 3 into the liquid crystal display panel 1 (cell 1a). The leaf 6 for sealing pressed to the liquid crystal injection hole 3 is irradiated with UV rays to cure the UV curing resin 5, by which the leaf 6 for sealing is adhered to the circumference of the liquid crystal injection hole 3 to seal the liquid crystal injection hole 3.

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 panel and a method of manufacturing the same, and more particularly, to a liquid crystal display panel suitable for application to a TV monitor and a display device for OA equipment, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, liquid crystal display panels have been widely used as display means such as TV monitors and display devices for OA equipment. FIG. 3 shows a configuration around a liquid crystal injection hole of a conventional liquid crystal display panel, and is a perspective view showing a state where a part of the panel surface is cut away. A liquid crystal injection hole 33 for injecting the liquid crystal 32 is formed in the upper part of the liquid crystal display panel 31. The liquid crystal 32 injected from the liquid crystal injection hole 33 is filled in the liquid crystal display panel 31. ing. 34 is a peripheral sealing material. The liquid crystal injection hole 33 is sealed with an ultraviolet curable resin 35 which is a sealing material.

FIGS. 4A to 4C are cross-sectional views showing a conventional method for sealing a liquid crystal injection hole of a liquid crystal display panel. First, a cell is fabricated by bonding two glass substrates provided with electrodes, switching elements, and the like, mainly using an epoxy resin as a peripheral sealing material 34. Furthermore, after injecting the liquid crystal 32 from the liquid crystal injection hole 33 formed in the cell, an acrylic ultraviolet curable resin 35 is mainly applied to the liquid crystal injection hole 33 by the dispenser 36 (FIG. 4A).

Next, the ultraviolet curing resin 35 applied to the liquid crystal injection hole 33 is irradiated with ultraviolet rays 38 by an ultraviolet lamp 37 (FIG. 4B). By this ultraviolet irradiation, the ultraviolet curing resin 35 is cured to seal the cell, thereby completing the production of the liquid crystal display panel 31 (FIG. 4).
(C)).

By the way, as the ultraviolet curable resin 35 for sealing the liquid crystal injection hole 33, it is necessary to substantially prevent the resin 35 from flowing between the application of the liquid crystal injection hole 33 and the irradiation of ultraviolet light. A resin having a viscosity of about 10 poise is used. Therefore, immediately after the application of the ultraviolet curable resin 35 to the liquid crystal injection hole 33, the resin 35 rises to a height of about 1 mm, and after being cured, as shown in FIG. 3 and FIG. A swell of about 0.7 mm remains.

As means for preventing the rise of the ultraviolet curable resin, for example, JP-A-61-2627
No. 83, Japanese Patent Application Laid-Open No. 60-232529 and the like are known. In the techniques described in these publications, the liquid crystal display panel is sealed over the entire area of one or two sides by using a thin piece and fixing the liquid crystal display panel to the vertical wall surface at the edge of the liquid crystal panel with an adhesive. Like that. However, the purpose of the liquid crystal display panel sealing technology described in the above publication is to manufacture a large-sized liquid crystal display panel by a so-called multi-panel system in which a plurality of sealed liquid crystal display panels are connected and arranged on a plane. And the thickness of the flakes is kept below 0.1 mm. Therefore, in the above prior art, it is not the purpose of obtaining the reliability required for the liquid crystal display panel using only the thin slice. In other words, the reliability of the liquid crystal display panel is maintained by the peripheral sealing material having a width of about 1 mm positioned at the outermost periphery of the large liquid crystal display panel after connecting the plurality of liquid crystal display panels.

[0007]

However, the above-mentioned prior art has the following problems. That is, as the ultraviolet curable resin applied to the end surface (liquid crystal injection hole) of the liquid crystal display panel, a high-viscosity resin is used in order to prevent the resin from flowing out after being irradiated with ultraviolet rays until it is cured. Since it is used, the ultraviolet curable resin swells on the panel end face and cures while projecting from the panel end face. As described above, since the swelling of the ultraviolet curable resin remains on the panel end surface, there is a problem that it becomes difficult to design a narrow frame for making the peripheral frame of the liquid crystal display panel thin.

As described above, in order to prevent the ultraviolet curable resin from flowing out before it is cured, the ultraviolet curable resin is required to have characteristics such as curing by short-time ultraviolet irradiation and high viscosity. In order to maintain this, some restrictions are imposed on the material and manufacturing method of the ultraviolet curable resin, so that the inherent moisture permeability of the ultraviolet curable resin cannot be suppressed. As described above, since the moisture permeability of the ultraviolet curable resin cannot be suppressed, the airtightness of the liquid crystal display panel is sufficiently maintained in a case where higher reliability is required with the recent narrowing of the frame of the liquid crystal display panel. May not be possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and prevents the swelling of an ultraviolet curable resin applied to a liquid crystal injection hole after curing, and improves the reliability of sealing at the liquid crystal injection hole. It is an object of the present invention to provide a liquid crystal display panel and a manufacturing method thereof.

[0010]

In order to solve the above-mentioned problems, the present invention is directed to a cell comprising a pair of substrates bonded via an adhesive material, and a liquid crystal injection formed in the cell. And a liquid crystal display panel comprising a liquid crystal injected and filled into the cell through the liquid crystal injection hole,
The liquid crystal injection hole is sealed by a flaky member having a coating layer of an ultraviolet curable resin on a surface facing the liquid crystal injection hole.

According to a second aspect of the present invention, there is provided the liquid crystal display panel according to the first aspect, wherein the flaky member is formed of a material which can transmit at least light in an ultraviolet region and has no moisture permeability. It is characterized by being.

According to a third aspect of the present invention, there is provided the liquid crystal display panel according to the first or second aspect, wherein the flaky member comprises:
It is characterized by being formed from a resin film or a non-alkali glass plate.

[0013] The invention according to claim 4 is based on claim 1,
4. According to the method of manufacturing a liquid crystal display panel described in 2 or 3, after injecting and filling a liquid crystal into the inside of the cell through the liquid crystal injection hole, a flaky member coated with an ultraviolet curable resin on one surface is removed from the one piece. The surface is opposed to the liquid crystal injection hole and pressed against the liquid crystal injection hole, and the ultraviolet light is irradiated on the flaky member pressed against the liquid crystal injection hole to cure the ultraviolet curing resin. The liquid crystal injection hole is sealed by adhering the flaky member around the liquid crystal injection hole.

[0014]

According to the structure of the present invention, the liquid crystal injection hole is sealed by the flaky member coated with the ultraviolet curable resin.
The thickness of the protruding part in the liquid crystal injection hole is a flaky member coated with an ultraviolet curable resin from the rise due to the curing of the ultraviolet curable resin when the liquid crystal injection hole is sealed using only the ultraviolet curable resin as in the past. Therefore, the thickness of the protruding portion can be made smaller than before and the variation in thickness can be reduced. In this case, the ultraviolet curable resin may be previously and thinly and uniformly applied to the flaky member.

Further, by using a flaky member made of a material having no moisture permeability to seal the liquid crystal injection hole, compared with the conventional case where the liquid crystal injection hole is sealed using only an ultraviolet curable resin, The reliability of sealing the liquid crystal display panel is improved. Thereby, it is possible to accurately cope with high airtightness and improvement of reliability of the liquid crystal display panel.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. First Embodiment FIG. 1 is a diagram showing a configuration around a liquid crystal injection hole of a liquid crystal display panel according to a first embodiment of the present invention, and is a perspective view showing a state in which a part of the panel surface is cut away. FIG. 2 is a cross-sectional view for explaining a step of sealing the liquid crystal injection hole of the liquid crystal display panel. First, the configuration around the liquid crystal injection hole of the liquid crystal display panel will be described with reference to FIG.

In the liquid crystal display panel 1 of this embodiment, two transparent substrates, such as non-alkali glass plates, on which electrodes, switching elements, etc. are provided, are bonded together using an epoxy-based adhesive. Is formed, and at the top of the cell 1a,
A liquid crystal injection hole 3 for injecting the liquid crystal 2 is formed, and the inside of the cell 1a is filled with the liquid crystal 2 injected from the liquid crystal injection hole 3 and sealed with a sealing material 4. The liquid crystal injection hole portion 3 is sealed by a sealing flake 6 coated with a UV curable resin 5 on the lower surface. That is, this embodiment is characterized in that the liquid crystal injection hole 3 of the liquid crystal display panel 1 immediately after the liquid crystal 2 is filled is sealed with the sealing flake 6 coated with the ultraviolet curing resin 5. It has become.

In this embodiment, a polyester film having a thickness of, for example, 0.1 mm is suitably used as a material of the sealing thin piece 6. The thickness of the ultraviolet curable resin 5 applied to the sealing flake 6 is, for example, about 0.1 mm.
A photocurable resin that is cured by irradiation with ultraviolet light having a center wavelength of, for example, 365 nm is preferably used. The total thickness of the sealing thin piece 6 coated with the ultraviolet curing resin 5 is 0.2 mm.
Set to about.

Next, referring to FIG. 2, a method of sealing the liquid crystal injection hole 3 of the liquid crystal display panel 1 (cell 1a) having the above configuration will be described. (I) Liquid crystal removing step (FIG. 2A). First, the liquid crystal 2 is inserted into the cell 1a through the liquid crystal injection hole 3.
To fill the inside of the cell 1a with the liquid crystal 2.
Immediately after the filling of the liquid crystal 2, excess liquid crystal 2 attached around the liquid crystal injection hole 3 is removed by the liquid crystal cleaner 7.

In this embodiment, as the liquid crystal cleaner 7, a roll-shaped dust-free fiber cloth 7b is used as a rubber roll 7a.
Uses one that is pressed with. When removing the liquid crystal with the liquid crystal cleaner 7, it was confirmed that the liquid crystal 2 was completely absorbed by the dust-free fiber cloth 7b at least at a visual level.

(Ii) Sealing slice mounting step (FIG. 2)
(B)). Next, the other surface of the sealing flake 6 coated with the ultraviolet curable resin 5 on one surface is adsorbed on the suction head 8 and the liquid crystal display panel 1 is moved by a predetermined transport mechanism (not shown).
It is transported to the liquid crystal injection hole 3 of (cell 1a). And
The suction head 8 presses the sealing thin piece 6 coated with the ultraviolet curable resin 5 against the liquid crystal injection hole 3.

In this embodiment, the position accuracy when the sealing flake 6 coated with the ultraviolet curing resin 5 is adhered to the liquid crystal injection hole 3 is ± 0.5 mm. With the conventional method of sealing the liquid crystal injection hole with only the UV-curable resin, the positional accuracy including the variation in the shape of the UV-cured resin after curing was about ± 5 mm. It turned out to be improved.

(Iii) UV irradiation step (FIG. 2C). Next, when the suction operation is canceled by the suction head 8 while pressing the sealing flake 6 coated with the ultraviolet curable resin 5 against the liquid crystal injection hole 3, the viscosity of the ultraviolet curable resin 5 causes the ultraviolet curable resin 5 to be released. Is applied to the liquid crystal injection hole 3. Thereafter, when ultraviolet rays 10 are irradiated from above the sealing flakes 6 by an ultraviolet lamp 9, the ultraviolet curable resin 5 applied to the lower surface of the sealing flakes 6 is cured, and the sealing flakes 6 are filled with liquid crystal injection holes. Adhered to the part 3.

In this embodiment, as described above, since the thickness of the ultraviolet curing resin 5 is smaller than that of the conventional one (thickness: for example, about 0.1 mm), the ultraviolet irradiation time is shortened. Can be. That is, it was confirmed that the ultraviolet curable resin 5 was cured in about half the time of the related art.

Further, in the prior art, there is a problem that the ultraviolet curable resin applied to the liquid crystal injection hole leaks out before the ultraviolet irradiation, and the leaked liquid crystal contaminates the display surface of the liquid crystal display panel. It occurred at a rate of 2%,
In this embodiment, the ultraviolet curable resin 5 is sandwiched between the sealing thin piece 6 and the liquid crystal display panel 1 (cell 1a), so that the outflow of the ultraviolet curable resin 5 can be completely prevented. It has become possible.

In this embodiment, since the ultraviolet curing resin 5 is irradiated with ultraviolet rays from above the sealing flake 6 coated on the lower surface, the ultraviolet curing resin 5 is cured.
It is an essential condition that the sealing flake 6 is a material that can transmit at least the light in the ultraviolet region. In order to improve the airtightness of the liquid crystal display panel 1, the sealing flake 6 is used. Is also an essential condition that the material has no moisture permeability. From the above points, as the material of the sealing flakes 6,
Polyester films are preferred.

As described above, according to the structure and the manufacturing method of this embodiment, the thickness of the projecting portion in the liquid crystal injection hole 3 of the liquid crystal display panel 1 (cell 1a) is different from that of the prior art in that only the ultraviolet curable resin is used. The thickness of the sealing flakes 6 coated with the ultraviolet-curable resin 5 from the swelling (approximately 0.4 to 0.7 mm in the conventional example) due to the curing of the ultraviolet-curable resin when the liquid crystal injection hole is sealed using (In this example, approximately 0.2 mm), the thickness of the protruding portion can be made smaller than before, and the thickness variation can be reduced. Thus, it is possible to accurately cope with a narrow frame of the liquid crystal display panel.

Further, instead of sealing the liquid crystal injection hole of the liquid crystal display panel (cell) with only the ultraviolet-curable resin having moisture permeability as in the prior art, the sealing flake 6 having no moisture permeability and the lower surface of the flake are not used. Since the liquid crystal injection hole 3 is sealed by the ultraviolet curing resin 5 applied to the liquid crystal panel, the moisture resistance of the liquid crystal display panel 1 is improved about twice as much as the conventional one. As a result, it is possible to appropriately cope with the production of a liquid crystal display panel that requires higher reliability in the future.

Further, instead of sealing the liquid crystal injection hole portion of the liquid crystal display panel (cell) only with an ultraviolet-curable resin having an unstable shape as in the prior art, the sealing thin film 6 having a stable shape and the thin flakes are used. The liquid crystal injection hole 3 is sealed by the applied ultraviolet curing resin 5 and the sealing flakes 6 are formed.
Is adhered to the liquid crystal injection hole 3 using the suction head 8, so that the positional accuracy at the time of attaching the sealing flake 6 is reduced to the positional accuracy when the liquid crystal injection hole is sealed only with the conventional ultraviolet curable resin. : Dramatically improved from ± 5 mm to ± 0.5 mm. Accordingly, it is possible to design the liquid crystal display panel with higher accuracy in response to the trend of narrowing the frame of the liquid crystal display panel.

Further, as described above, the liquid crystal injection hole 3 is formed by the sealing flake 6 and the ultraviolet curable resin 5 applied to the flake.
Is sealed, so that the thickness of the layer of the ultraviolet curable resin 5 can be made smaller than before, and accordingly, the amount of ultraviolet light to be applied to the ultraviolet curable resin 5 can be made smaller than before. it can. Accordingly, since the irradiation time of the ultraviolet ray is short (about half of the conventional time), the time required for the step of curing the ultraviolet curable resin 5 and the tact time can be reduced.

Further, since the ultraviolet curable resin 5 is sandwiched between the liquid crystal display panel 1 (cell 1a) and the sealing flakes 6, the ultraviolet curable resin applied to the liquid crystal injection hole as in the prior art is irradiated with ultraviolet light. Thus, it is possible to accurately prevent the problem that the liquid crystal display panel flows out before curing and the liquid crystal display panel surface is contaminated at a rate of 1 to 2%. Thereby, the productivity of the liquid crystal display panel can be improved. In the first embodiment, the liquid crystal display panel 1 having a structure in which the liquid crystal injection hole 3 is sealed by the sealing flakes 6 coated with the ultraviolet curable resin 5 has the same moisture resistance as the conventional liquid crystal display panel ( Cell), compared to the case where the liquid crystal injection hole of the cell was sealed only with ultraviolet curing resin,
It was confirmed that it had almost twice the moisture resistance.

Second Embodiment Next, a second embodiment of the present invention will be described. The configuration of the second embodiment is largely different from that of the first embodiment in that the sealing flake 6 for sealing the liquid crystal injection hole 3 is provided.
Is that, instead of the polyester film, a non-alkali glass plate having a thickness of, for example, 0.2 mm and the same as the material of the liquid crystal display panel 1 (cell 1a) is used. In this example, an ultraviolet curable resin 5 that is cured by irradiation with ultraviolet light having a center wavelength of, for example, 365 nm is applied to the sealing flake 6 made of an alkali-free glass plate, for example, at approximately 0.1.
The thickness of the entire sealing thin piece 6 is set to about 0.3 mm by applying it to a thickness of mm. Except for the above points, the configuration of the liquid crystal display panel of this example and the manufacturing method thereof are substantially the same as those of the first embodiment (FIGS. 1 and 2).
The description is omitted.

According to the structure of the second embodiment, the liquid crystal display panel 1 having a structure in which the liquid crystal injection hole 3 is sealed by the sealing flakes 6 coated with the ultraviolet curable resin 5 has the conventional moisture resistance. As compared with the case where the liquid crystal injection hole of the liquid crystal display panel is sealed only with the ultraviolet curing resin,
It was confirmed to have twice the moisture resistance. Further, instead of sealing the liquid crystal injection hole portion of the liquid crystal display panel only with a moisture-permeable ultraviolet curing resin as in the prior art, the sealing flake 6 having no moisture permeability and the ultraviolet curing resin applied to the lower surface of the flake are not used. 5, the liquid crystal injection hole 3 is sealed, so that the moisture resistance of the liquid crystal display panel 1 is improved about three to five times as compared with the conventional case. As a result, it is possible to accurately cope with the manufacture of a liquid crystal display panel that requires higher reliability in the future.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like that do not depart from the gist of the present invention. Is also included in the present invention. For example, in the above-described first embodiment, a polyester film was used as the material of the sealing flakes 6, but the material is not limited to the polyester film, and is transparent or has at least a light in the ultraviolet region having a function equivalent to that of the polyester film. Other suitable materials that can be made and have no moisture permeability may be used. Suitable materials include, for example, polycarbonate, acrylic, polyethylene, chlorinated polyethylene, polypropylene, polyimide, polyethylene terephthalate, polybutylene terephthalate, polyamide (nylon), polyacetal, polyether, polystyrene,
Synthetic resins such as polyphenylene sulfide, polyvinyl chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, polyvinyl butyral, polyvinyl fluoride, polyvinylidene fluoride, polyurethane, styrene-acryl copolymer Can be mentioned.

In the above-described second embodiment, the case where the same alkali-free glass plate as the material of the liquid crystal display panel 1 is used as the material of the sealing flakes 6 has been described. Instead, another material that has a function equivalent to that of a non-alkali glass plate and that can transmit light in a transparent or at least ultraviolet region and has no moisture permeability may be used.

Further, in the above-described embodiment, as shown in FIG. 1, the sealing flakes 6 have a rectangular shape in plan view, but the present invention is not limited to this shape. Any shape can be used as long as it can be sealed and does not hinder the narrow frame design of the liquid crystal display panel 1.

In the above embodiment, the liquid crystal cleaner 7
Although a non-dust-generating fiber cloth 7b in a roll shape is pressed by a rubber roll 7a, the present invention is not limited to this configuration, and other liquid crystal removing means having the same function as the liquid crystal cleaner 7 is used. May be used.

[0038]

As described above, according to the liquid crystal display panel and the method of manufacturing the same of the present invention, the liquid crystal injection hole has a flaky shape having a coating layer of an ultraviolet curable resin on the surface facing the liquid crystal injection hole. Because of the sealing by the member, the thickness of the protruding portion in the liquid crystal injection hole of the liquid crystal display panel is the same as that of the conventional case where the liquid crystal injection hole is sealed using only the ultraviolet curing resin. The rise due to curing can be suppressed to the thickness of the flaky member coated with the ultraviolet curing resin. Therefore, the thickness of the protruding portion can be made smaller than before, and the thickness variation can be reduced. Thus, it is possible to accurately cope with a narrow frame of the liquid crystal display panel.

Further, instead of sealing a liquid crystal injection hole of a liquid crystal display panel only with a moisture-permeable ultraviolet curing resin as in the prior art, a lamella having no moisture permeability and an ultraviolet curable resin applied to the lamella are used. Since the liquid crystal injection hole is sealed with a resin, the moisture resistance of the liquid crystal display panel can be improved as compared with the related art. As a result, it is possible to accurately cope with the manufacture of a liquid crystal display panel that requires higher reliability in the future.

Further, instead of sealing the liquid crystal injection hole of the liquid crystal display panel only with an ultraviolet-curable resin having an unstable shape as in the prior art, a flake-shaped member having a stable shape and an ultraviolet-cured resin applied to the flake-shaped member are used. Since the liquid crystal injection hole is sealed with resin, the positioning accuracy when attaching the flake-shaped member to the liquid crystal injection hole is improved compared to the position accuracy when the liquid crystal injection hole is sealed only with the conventional ultraviolet curing resin. Can be done. Accordingly, it is possible to design the liquid crystal display panel with higher accuracy in response to the trend of narrowing the frame of the liquid crystal display panel.

Further, since the liquid crystal injection hole is sealed by the flaky member and the ultraviolet curable resin applied to the flaky member, the thickness of the ultraviolet curable resin layer can be made smaller than before. Accordingly, the amount of ultraviolet light to be applied to the ultraviolet curable resin can be made smaller than before. Accordingly, the irradiation time of the ultraviolet ray can be reduced in a short time, so that the time required for curing the ultraviolet curable resin and the tact time can be reduced.

Further, since the ultraviolet curable resin is sandwiched between the liquid crystal display panel and the flaky member, the ultraviolet curable resin applied to the liquid crystal injection hole flows out until it is cured by the irradiation of ultraviolet light as in the conventional case. In addition, it is possible to accurately prevent the occurrence of a problem that the surface of the liquid crystal display panel is contaminated. Thereby, the productivity of the liquid crystal display panel can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration around a liquid crystal injection hole of a liquid crystal display panel according to a first (second) embodiment of the present invention, and is a perspective view showing a state where a part of a panel surface is cut away.

FIGS. 2A and 2B are diagrams for explaining a method of sealing a liquid crystal injection hole of the liquid crystal display panel, wherein FIG. 2A is a cross-sectional view showing a state where liquid crystal is removed from the liquid crystal injection hole, and FIG. Sectional view showing a state where the sealing flakes are attached to the part,
(C) is a cross-sectional view showing a state in which ultraviolet rays are irradiated on the ultraviolet curing resin on the lower surface of the sealing flake.

FIG. 3 is a perspective view showing a configuration around a liquid crystal injection hole of a liquid crystal display panel according to a conventional example, and showing a state where a part of a panel surface is cut away.

4A and 4B are views for explaining a method of sealing a liquid crystal injection hole of a liquid crystal display panel according to a conventional example, and FIG. 4A is a cross-sectional view showing a state in which an ultraviolet curable resin is applied to the liquid crystal injection hole;
(B) is a cross-sectional view showing a state where the ultraviolet curable resin is irradiated with ultraviolet light, and (c) is a cross-sectional view showing a state where the ultraviolet curable resin is cured.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 liquid crystal display panel 1 a cell 2 liquid crystal 3 liquid crystal injection hole (liquid crystal injection hole) 5 ultraviolet curable resin 6 sealing flake (flake-shaped member)

Claims (4)

[Claims] 1. A cell comprising a pair of substrates bonded via an adhesive material, and a liquid crystal injection hole formed in the cell, and liquid crystal is injected and filled into the cell via the liquid crystal injection hole. Wherein the liquid crystal injection hole is sealed by a flaky member having a coating layer of an ultraviolet curable resin on a surface opposite to the liquid crystal injection hole. Liquid crystal display panel. 2. The liquid crystal display panel according to claim 1, wherein the flaky member is made of a material that can transmit at least light in an ultraviolet region and has no moisture permeability. 3. The liquid crystal display panel according to claim 1, wherein the flaky member is formed from a resin film or a non-alkali glass plate. 4. The method for manufacturing a liquid crystal display panel according to claim 1, wherein the liquid crystal is injected and filled into the cell through the liquid crystal injection hole, and then an ultraviolet curable resin is applied to one surface. The coated flaky member is pressed against the liquid crystal injection hole with the one surface facing the liquid crystal injection hole, and ultraviolet light is applied to the flaky member pressed against the liquid crystal injection hole. Curing the ultraviolet curing resin to adhere the flaky member around the liquid crystal injection hole and seal the liquid crystal injection hole.