JPH07168175A - Non-curl liquid crystal display panel - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a liquid crystal display panel which does not curl even in a large panel using a plastic substrate. [Configuration] In a panel in which polarizing plates are located on the front side and the rear side, a reflector or a light guide is provided on the rear side polarizing plate, and the whole is basically made of plastics, A non-water-absorptive thin film layer is laminated on the front-side polarizing plate, or a protective film on the incident light side for protecting the polarizing element film of the front-side polarizing plate of the panel is composed of the non-water-absorptive thin film layer.

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 which is basically made of plastic and does not curl even if it is large.

[0002]

2. Description of the Related Art A typical structure of a liquid crystal display panel is a "polarizing plate / liquid crystal cell / polarizing plate" or a phase plate interposed between the liquid crystal cell and at least one polarizing plate. In the case of a reflection type panel, a reflector is installed on the polarizing plate on the rear side (the side opposite to the incident light side). In the case of a backlight type panel, the light guide is installed on the rear side (the side opposite to the incident light side) of the polarizing plate.

A liquid crystal cell has a structure in which a liquid crystal is sealed between two substrates which are opposed to each other with a slight gap.
Here, a glass substrate is usually used as the substrate (liquid crystal cell substrate), but in the case of a relatively small liquid crystal display panel, a plastics substrate is also being used. The liquid crystal cell substrate may be provided with an alignment film, rubbed on the alignment film, or provided with a transparent electrode. However, since these points are conventional methods, description thereof will be omitted. To do.

A polarizing plate generally has a layer structure of "protective film layer / polarizing element film / protective film layer". As the polarizing film, polyvinyl alcohol-iodine type, polyvinyl alcohol-dichromatic dye type, etc. are used. In most cases, a cellulose triacetate film called TAC is used as the protective film layer. Adhesion between the protective film layer, the polarizing element film, and the protective film is usually performed using an aqueous solution of a water-soluble resin such as polyvinyl alcohol. Because all of these layers are hydrophilic layers, the adhesiveness with the aqueous solution adhesive is good, and further, the water drainage during the bonding operation with the aqueous solution adhesive is performed smoothly. is there.

The phase plate generally has a layer structure of "protective film layer / retarder film / protective film layer". As the retardation film, a uniaxially stretched film, particularly a uniaxially stretched polycarbonate film, a uniaxially stretched polyvinyl alcohol film, or a uniaxially stretched polyarylate film is used.
As the protective film layer, in most cases, a cellulose triacetate film called TAC is used, like the protective film layer for producing a polarizing plate.

As the reflector, a support film provided with a reflective layer is used. Here, a polyester film is usually used as the support film, and an aluminum vapor deposition layer is usually used as the reflective layer.

As the light guide member, a light guide plate which is usually an acrylic plate provided with a vapor deposition layer is used. The light guide is
Made from the edge of the acrylic plate (Koguchi).

Adhesive lamination between the polarizing plate, the phase plate, the liquid crystal cell, the reflector and the light guide is usually carried out by using an adhesive.

When a plastics substrate is used as the liquid crystal cell substrate, it has been proposed to use the substrate also as a phase plate having a phase function, or as the polarizing plate also as a polarizing plate. There is.

[0010]

Liquid crystal display panels in which polarizing plates are located on the front side and the rear side and a reflector or a light guide is provided on the rear side polarizing plate are widely used at present. However, when the liquid crystal cell substrate is a plastics substrate, when the panel becomes large, the panel tends to curl like bowing along the center line or twisting along the diagonal line due to moisture absorption. There is. The curl at this time is convex on the incident light side.

Due to such a problem of curling, there is a limit to the increase in size of a liquid crystal display panel using a plastic substrate. However, the adoption of lightweight and durable plastic substrates and the upsizing of liquid crystal display panels have become a trend of the times. It is a strong desire of the industry to prevent curling when the size increases.

Under such a background, the present invention has an object to provide a liquid crystal display panel which does not curl even in a large panel using a plastic substrate.

[0013]

One of the non-curl liquid crystal display panels of the present invention is that a polarizing plate is located on the front side and the rear side, and a reflector or a light guide is provided on the rear side polarizing plate. In a panel which is provided and is basically made of plastics, a non-water-absorbing thin film layer is laminated and installed on a polarizing plate on the front side of the panel.

In another non-curl liquid crystal display panel of the present invention, polarizing plates are located on the front side and the rear side, and a reflector or a light guide is provided on the rear side polarizing plate, and In a panel made entirely of plastics,
The protective film on the incident light side for protecting the polarizing element film of the polarizing plate on the front side of the panel is constituted by a non-water-absorbing thin film layer.

The present invention will be described in detail below.

The basic structure of the panel is such that polarizing plates are located on the front and rear sides, a reflector or a light guide is provided on the rear polarizing plate, and the whole structure is basically made of plastics. It has the following structure. I. Polarizer / liquid crystal cell / polarizer / reflector or light guide b. Polarizer / phase plate / liquid crystal cell / polarizer / reflector or light guide c. Polarizer / liquid crystal cell / phase plate / polarizer / reflector or light guide d. Polarizer / Phase plate / Liquid crystal cell / Phase plate / Polarizer / Reflector or light guide e. In the above items a to d, at least one of the polarizing plate and the phase plate adjacent to the liquid crystal cell also serves as the liquid crystal cell substrate.

As the liquid crystal cell substrate, a base material sheet, a base material sheet provided with a crosslinkable resin cured material layer on at least one surface thereof, and a gas permeation resistant resin layer provided on at least one surface of the base material sheet, Examples include those provided with a crosslinkable resin cured product layer from the top, those obtained by laminating a laminate of a gas permeable resin layer and a crosslinkable resin cured product layer so that the gas permeable resin layers are on the inside. It Here, as the substrate sheet,
Examples thereof include polycarbonate, polyarylene ester, polysulfone, polyether sulfone, polyolefin having a bicyclo group, poly-4-methylpentene-1, polystyrene, and cellulose triacetate. Examples of the air-permeable resin layer include a polymer containing a vinyl alcohol component, an acrylonitrile component, and a vinylidene halide component in an amount of 50 mol% or more, and an ethylene-vinyl alcohol copolymer is particularly important. As the crosslinkable resin cured product layer, a thermosetting or room temperature crosslinkable resin such as a phenoxyether type crosslinkable resin, an epoxy resin, an acrylic resin, an acrylic epoxy resin, a melamine resin, a phenol resin, a urethane resin, or an ultraviolet curable type. Examples of the resin include active energy ray curable resins such as resins and electron beam curable resins.

As the polarizing plate, polyvinyl alcohol
A protective film layer was provided on both sides of the polarizing element film such as iodine type, ethylene-vinyl alcohol copolymer-iodine type, polyvinyl alcohol-dichromatic dye type, ethylene-vinyl alcohol copolymer-dichromatic dye type. Things are used. A representative example of the protective film layer is a cellulose triacetate sheet called TAC, but any polymer layer having optical isotropy can be used.

As the phase plate, one having a protective film layer on both sides of a retardation film made of a uniaxially stretched film is used. Since a certain type of polymer film may have orientation even if it is not uniaxially stretched, such a polymer film can also be used as a retardation film. Examples of the protective film layer include TAC (cellulose triacetate sheet, and any polymer layer having optical isotropy.

When at least one of the polarizing plate or the phase plate adjacent to the liquid crystal cell also serves as the liquid crystal cell substrate, the liquid crystal cell, the polarizing plate and the phase plate are not constituted by separate members, but the polarizing element film and the phase plate are not formed. A plastics substrate in which retardation film is laminated is used as a liquid crystal cell substrate.

As the reflector, a support film provided with a reflective layer, particularly a polyester film having an aluminum vapor deposition layer formed on one surface thereof is used. When the reflector is incorporated into the panel, the reflective layer is located inside and the support film is located outside.

As the light guide, a light guide plate such as an acrylic plate provided with a vapor deposition layer such as an aluminum vapor deposition layer is usually used. When the light guide is incorporated into the panel, the acrylic plate is located inside and the vapor deposition layer is located outside.
Light is guided from the edge (cog) of the acrylic plate. The light guide plate is classified into a flat type and a variant type. In place of the light guide plate, there is also a light guide body that utilizes diffused reflection in the air layer.

In the panel having the above structures (a) to (e), since the reflector or the light guide is located on the rear side (the side opposite to the incident light side) of the panel, the whole is asymmetric. . The presence of the reflector or the light guide makes the moisture absorption from the rear side of the panel almost zero, but the moisture absorption from the front side of the panel (incident light side) is not negligible. .
Therefore, the panel immediately after fabrication keeps a flat plate shape, but after that, dimensional change occurs due to moisture absorption from the front side of the panel, so that the panel curls in an arched shape along the center line or twists along the diagonal line. It tends to curl. In this case, the incident light side has a curl that is convex. This curl is
When the panel is small, it does not cause any trouble, but when the panel is large, it is a fatal defect.

Therefore, in the present invention, in the panel having the above structures (a) to (e), a non-water-absorbing thin film layer is laminated on the polarizing plate on the front side of the panel, or (B) of the panel. The incident-light-side protective film that protects the polarizing element film of the front-side polarizing plate is made of a non-water-absorbing thin film layer.

The non-water-absorptive thin film layer in the case of (A) and the non-water-absorptive thin film layer in the case of (B) are single-layer or multi-layer thin films having a water absorbency equal to or smaller than that of the polyester film. A layer is preferably used, and a polyester film (a film of polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate or the like), a polypropylene film or the like is preferably used. Further, a single layer or multiple layers including a layer of a thermosetting resin such as a phenoxy ether type crosslinkable resin or a room temperature curing resin, a single layer or a multiple layer including an active energy ray curing resin layer, and the like are also used. be able to. Since the non-water-absorbing thin film layer is provided on the outside of the polarizing plate on the incident light side, it may or may not have optical isotropy, and therefore, a non-stretched film, a uniaxially stretched film, a biaxially stretched film. Either of them may be used. As a non-water-absorbing thin film layer,
SiO ₂ , SiO _x on transparent plastic film
(X is between 1 and 2), ITO, SnO ₂ , In ₂ O ₃ , A
It is also possible to use a transparent vapor-deposited layer or sputtering layer of a metal or a metal compound such as a u alloy.

In the above, as the thermosetting resin or the room temperature curing resin, the resin as described above in the description of the base material sheet of the liquid crystal cell substrate is used.

As the active energy ray curable resin in the above, an ultraviolet ray curable resin or an electron beam curable resin is used. The UV-curable resin is a prepolymer or / and a monomer having photopolymerizability, and optionally other monofunctional or polyfunctional monomers, various polymers, photopolymerization initiators (acetophenones, benzophenones, Michler's ketone, benzyl, Benzoin, benzoin ether, benzyl ketals, thioxanthones, etc.) and sensitizers (amines, diethylaminoethyl methacrylate, etc.). Here, examples of the photopolymerizable prepolymer include polyester acrylate, polyester urethane acrylate, epoxy acrylate, and polyol acrylate, and examples of the photopolymerizable monomer include monofunctional acrylate, bifunctional acrylate, and trifunctional acrylate.
Examples thereof include functionally or higher acrylates. As the photopolymerizable prepolymer or monomer, in addition to the above, phosphazene resins are also preferably used. If necessary, an adhesion improver such as a polyisocyanate compound may be added to the ultraviolet curable resin liquid. As the electron beam curable resin liquid, the same one as the above ultraviolet curable resin liquid is used. However, it does not need to add a photopolymerization initiator.

When assembling the panel having the above-mentioned structures (a) to (e) and laminating the non-water-absorbing thin film layer on the polarizing plate on the front side of the panel, a liquid crystal cell, a polarizing plate, a phase plate,
Adhesive lamination of each member of the reflector or the light guide and the non-water-absorbing thin film layer may be performed by using an adhesive as used in ordinary panel assembly, but the presence of the adhesive layer causes the panel to curl due to moisture absorption. Therefore, it is desirable that all or part of the adhesive lamination of each member is performed using the thermosetting resin, the room temperature curing resin, or the active energy ray curing resin described above. In this case, it is desirable that the adhesive lamination is performed without solvent. Therefore, when a solvent is contained, it is desirable that the solvent be volatilized once by drying after coating and then pressure-bonded to complete the curing reaction. Adhesion and lamination of the protective film layers at the time of manufacturing the polarizing plate and the phase plate are also advantageously performed similarly using a thermosetting resin, a room temperature curing resin or an active energy ray curing resin.

[0029]

According to the present invention, a panel in which polarizing plates are located on the front and rear sides, a reflector or a light guide is provided on the rear polarizing plate, and the whole is basically made of plastics. In the above, a non-water-absorbing thin film layer is laminated on the polarizing plate on the front side of the panel, or a protective film on the incident light side for protecting the polarizing element film of the polarizing plate on the front side of the panel is a non-water-absorbing thin film layer. It consists of.

Therefore, although the whole panel is not structurally symmetrical, in terms of water absorption, the water-absorption resistance of the non-water-absorbing thin film layer located on the front side of the panel and the water absorption resistance of the non-water-absorbing thin film layer on the rear side of the panel are considered. Since the water absorption resistance of the positioned reflector or light guide is extremely small and it becomes a symmetrical type, curling is effective even when placed in a humid atmosphere and on a large panel. To be prevented.

All or part of the adhesive lamination of each member of the liquid crystal cell, the polarizing plate, the phase plate, the reflector or the light guide, and the non-water-absorbing thin film layer is formed of a thermosetting resin, a room temperature curing resin, or an active energy ray. When the curable resin is used as an adhesive, the anti-curl property of the panel becomes more complete.

[0032]

EXAMPLES The present invention will be further described with reference to examples. Hereinafter, “parts” means parts by weight.

Example 1 FIG. 1 is an exploded view showing an example of the non-curl liquid crystal display panel of the present invention.

On both sides of a 150 μm thick photoisotropic polycarbonate film (base film (1a)), an 8 μm thick layer of ethylene-vinyl alcohol copolymer (gas-permeable resin layer ( 1b)) is provided, and a phenoxyether type crosslinkable resin layer (curable resin cured product layer (1c)) having a thickness of 10 μm is further formed on the ethylene-vinyl alcohol copolymer layer by a casting method. By doing so, a liquid crystal cell substrate (11) was manufactured. Then, using the two liquid crystal cell substrates (11), the substrate (11) / liquid crystal was prepared by a conventional method.
(12) / Substrate (11), more specifically, curable resin cured product layer
(1c) / air-permeable resin layer (1b) / base film (1a) / air-permeable resin layer (1b) / curable resin cured product layer (1c) / liquid crystal (12) / curable resin cured product layer (1c) / air-permeable resin layer (1b) / base film (1a) / air-permeable resin layer (1b) / curable resin cured product layer (1
A liquid crystal cell (1) consisting of c) was prepared.

A protective film layer (22) or (22) made of a cellulose triacetate film having a thickness of 80 μm is formed on both sides of a polarizing film (21) made of a polyvinyl alcohol-iodine system having a thickness of 35 μm with an aqueous polyvinyl alcohol solution as an adhesive. Then, they were laminated and adhered to prepare polarizing plates (2) and (2).

Protective film layers (32), (32) made of a cellulose triacetate film having a thickness of 80 μm on both sides of a retardation film (31) made of a polyvinyl alcohol uniaxially stretched film having a thickness of 50 μm and a retardation value of 400 nm.
Was laminated and adhered using a polyvinyl alcohol aqueous solution as an adhesive to prepare a phase plate (3).

As the reflector (4), a support film (41) made of a polyester film having a thickness of 50 μm and a reflection layer (42) made of an aluminum vapor deposition layer formed on one surface was prepared.

Using the above liquid crystal cell (1), polarizing plates (2) and (2), phase plate (3) and reflector (4), polarizing plate (2) / phase plate (3) / liquid crystal cell A panel having a structure of (1) / polarizing plate (2) / reflector (4) was produced. For the adhesive lamination of each member, a usual acrylic pressure-sensitive adhesive used for assembling a liquid crystal display panel was used. The reflector (4) is its supporting film.
The side of (41) is the outermost side of the panel.

Then, on the polarizing plate (2) on the front side (incident light side) of this panel, a non-water-absorbing thin film layer (6) made of a polyester film (biaxially stretched polyethylene terephthalate film) having a thickness of 50 μm was used as an acrylic type. Laminated with adhesive. As a result, the non-curl liquid crystal display panel shown in FIG. 1 was obtained.

This liquid crystal display panel was placed at a temperature of 80 ° C. and a humidity of 9
When left in an atmosphere of 5% RH for 1 week, no curl was observed.

Example 2 FIG. 2 is an exploded view showing another example of the non-curl liquid crystal display panel of the present invention.

As the light guide (5), a light guide plate (51) made of an acrylic plate provided with a vapor deposition layer (52) of aluminum was prepared. In the same manner as in Example 1 except that this light guide (5) was used in place of the reflector (4) in Example 1, a polarizing plate (2) / phase plate (3) / liquid crystal cell (1) / A panel having a structure of polarizing plate (2) / light guide (5) was produced.

Next, on the polarizing plate (2) on the front side (incident light side) of this panel, a non-water-absorbing thin film layer (6) made of a polyester film (biaxially stretched polyethylene terephthalate film) having a thickness of 50 μm was used as an acrylic type. Laminated with adhesive. As a result, the non-curl liquid crystal display panel shown in FIG. 2 was obtained.

This liquid crystal display panel is set at a temperature of 80 ° C. and a humidity of 9
When left in an atmosphere of 5% RH for 1 week, no curl was observed.

Example 3 Adhesive lamination of the liquid crystal cell (1), the polarizing plates (2) and (2), the phase plate (3), the reflector (4) and the non-water-absorbing thin film layer (6) in Example 1 was performed. , Non-solvent type adhesive, that is, 100 parts of epoxy acrylic resin and 1 part of aliphatic polyisocyanate
It was carried out using an ultraviolet curable resin liquid in which 0 part and 5 parts of benzophenone were mixed. For each adhesive lamination operation, UV curable resin liquid was used for about 4μ using a Mayer bar 0.2m / mφ.
Coating to m thickness, output 120W / cm, 1 lamp, lamp distance 2
00 mm, line speed 2 m / min, 1 pass, light intensity 600 mJ / c
It was performed by irradiating with ultraviolet rays under the condition of m ² .

The curl-preventing property when the obtained liquid crystal display panel was left for 1 week in an atmosphere of a temperature of 80 ° C. and a humidity of 95% RH was more excellent than that of Example 1.

Example 4 A multi-layer non-water-absorbing thin film layer (6) in which an ITO layer or a SiO ₂ layer was formed on one surface of a polyester film (biaxially stretched polyethylene terephthalate film) having a thickness of 50 μm through an anchor coating layer. Example 1 was repeated except that the above was laminated and adhered on the polarizing plate (2) on the front side (incident light side) of the panel so that the ITO layer side or the SiO ₂ layer side became the outermost layer. The anti-curl property in this case was even better than that of Example 1.

Example 5 Adhesive lamination of liquid crystal cell (1), polarizing plates (2) and (2), phase plate (3), light guide (5) and non-water-absorbing thin film layer (6) in Example 2 Is a non-solvent type adhesive, that is, 100 parts of epoxy acrylic resin and 7 parts of aliphatic polyisocyanate.
Was performed in the same manner as in Example 3 using an ultraviolet curable resin liquid containing 1 part of benzophenone and 1 part of benzophenone.

The curl-preventing property when the obtained liquid crystal display panel was left in an atmosphere of a temperature of 80 ° C. and a humidity of 95% RH for 1 week was more excellent than that of Example 2.

Embodiment 6 FIG. 3 is an exploded view showing still another example of the non-curl liquid crystal display panel of the present invention.

A liquid crystal cell substrate (11) and further a liquid crystal cell (1) were prepared in the same manner as in Example 1 except that a 140 μm thick optically isotropic polyarylene ester film was used as the substrate film (1a). Was manufactured.

A protective film layer (22), (22) made of a cellulose triacetate film having a thickness of 80 μm was formed on both surfaces of a polarizing film (21) made of a polyvinyl alcohol-iodine system having a thickness of 35 μm, and an aqueous polyvinyl alcohol solution was used as an adhesive. Then, they were laminated and adhered to each other to prepare a polarizing plate (2) on the rear side.

Further, a polarizing film (21) made of polyvinyl alcohol-iodine and having a thickness of 35 μm has a thickness of 80
A protective film layer (22) consisting of a cellulose triacetate film of μm was adhered and laminated using an aqueous polyvinyl alcohol solution as an adhesive, and a polyester film (biaxial film) of 50 μm thickness was formed on the other surface of the polarizing film (21). Stretched polyethylene terephthalate film) non-water-absorbing thin film layer (6) is laminated and adhered using an acrylic adhesive,
Non-water-absorbing thin film layer (6) / polarizing film (21) / protective film layer (2
A front polarizing plate (2 ′) having the layer structure of 2) was produced.

The same phase plate (3) and reflector (4) as in Example 1 were used, and these liquid crystal cell (1), polarizing plates (2) and (2 '), and phase plate (3) were used. And polarizing plate (2) / phase plate (3) / liquid crystal cell (1) / polarizing plate
A panel having the structure of (2) / reflector (4) was prepared (see FIG. 3). For the adhesive lamination of each member, a usual acrylic pressure-sensitive adhesive used for assembling a liquid crystal display panel was used.
The polarizing plate (2 ') has its non-water-absorbing thin film layer (6) on the outermost side of the panel, and the reflector (4) is its supporting film.
(41) is placed on the outermost side of the panel.

This liquid crystal display panel was set at a temperature of 80 ° C. and a humidity of 9
When left in an atmosphere of 5% RH for 1 week, no curl was observed.

Example 7 In Example 6, the cellulose triacetate film (protective film layer (22)) was laminated on the polarizing film (21) by using an aqueous polyvinyl alcohol solution as an adhesive to prepare the polarizing film (21). The non-water absorptive thin film layer (6) was laminated by using the same UV-curable resin liquid as in Example 3 to prepare a front polarizing plate (2 ′). As the rear polarizing plate (2), the same one as that manufactured in Example 6 was used.

Thereafter, a liquid crystal cell (1) was prepared in the same manner as in Example 6.
, The polarizing plates (2), (2 '), the phase plate (3), and the reflector (4) were adhesively laminated.The adhesive lamination of these members was a non-solvent type adhesive, that is, epoxy acrylic. An ultraviolet curable resin liquid prepared by mixing 100 parts of resin with 10 parts of aliphatic polyisocyanate and 5 parts of benzophenone was used.

The curl-preventing property when the obtained liquid crystal display panel was left for 1 week in an atmosphere of a temperature of 80 ° C. and a humidity of 95% RH was superior to that of Example 6.

[0059]

In the liquid crystal display panel of the present invention, a non-water-absorbing thin film layer is laminated on the polarizing plate on the front side of the panel or the polarizing element film of the polarizing plate on the front side of the panel is protected. The incident light side protective film is composed of a non-water-absorbing thin film layer.

Therefore, in view of the water absorption resistance, the water absorption resistance of the non-water-absorbing thin film layer located on the front side of the panel and the rear side of the panel are not concerned, although the whole panel is not symmetrical in structure. Since the water absorption resistance of the reflector or the light guide located at is extremely small and it becomes a symmetric type effectively, curling does not occur even in a large-sized panel and a large panel. Effectively prevented.

In addition to the above-mentioned installation of the non-water-absorbing thin film layer,
A thermosetting resin, a room temperature curable resin, or an active energy ray curable resin is used for all or part of the adhesive lamination of the liquid crystal cell, the polarizing plate, the phase plate, the reflector or the light guide, and the non-water-absorbing thin film layer. When used with it, the anti-curl properties of the panel are more complete.

[Brief description of drawings]

FIG. 1 is an exploded view showing an example of a non-curl liquid crystal display panel of the present invention.

FIG. 2 is an exploded view showing another example of the non-curl liquid crystal display panel of the present invention.

FIG. 3 is an exploded view showing still another example of the non-curl liquid crystal display panel of the present invention.

[Explanation of symbols]

(1) ... liquid crystal cell, (11) ... liquid crystal cell substrate, (12) ... liquid crystal, (1
a) ... Substrate film, (1b) ... Air-permeable resin layer, (1c) ... Cured resin cured material layer, (2), (2 ') ... Polarizing plate, (21) ... Polarizing element film, (22 ) ... Protective film layer, (3) ... Phase plate, (31) ... Phase retardation film, (32) ... Protective film layer, (4) ... Reflector, (41) ...
Support film, (42) ... Reflective layer, (5) ... Light guide, (51) ... Light guide plate, (52) ... Vapor deposition layer, (6) ... Non-water-absorbing thin film layer

Claims (4)

[Claims] 1. A panel in which polarizing plates are positioned on the front side and the rear side, a reflector or a light guide is provided on the rear side polarizing plate, and the whole is basically made of plastics. A non-curl type liquid crystal display panel comprising a non-water-absorbing thin film layer laminated on a polarizing plate on the front side of the panel. 2. A panel in which polarizing plates are located on the front side and the rear side, a reflector or a light guide is provided on the rear side polarizing plate, and the whole is basically made of plastics. A non-curl liquid crystal display panel, characterized in that an incident light side protective film for protecting a polarizing element film of a polarizing plate on the front side of the panel is constituted by a non-water-absorbing thin film layer. 3. A thermosetting resin, a room temperature curing resin, or an active material for all or part of the adhesive lamination of each member of the liquid crystal cell, the polarizing plate, the phase plate, the reflector or the light guide, and the moisture-proof thin film layer. The non-curl liquid crystal display panel according to claim 1 or 2, wherein the energy ray curable resin is used as an adhesive. 4. The water-absorbing property of the non-water-absorbing thin film layer is equal to or smaller than that of the polyester film.
The non-curl liquid crystal display panel described.