TWI752918B - Built-in liquid crystal panel and liquid crystal display device - Google Patents

Abstract

[Subject] The present invention provides a built-in liquid crystal panel that has good antistatic function and can satisfy the sensitivity of a touch sensor and durability in a humidified environment. [Solution] A built-in liquid crystal panel including a built-in liquid crystal cell and a polarizing film with an adhesive layer, the built-in liquid crystal cell having a liquid crystal layer, a first transparent substrate and a second transparent substrate, a touch sensor portion, and A driving electrode and a sensor portion, the liquid crystal layer contains liquid crystal molecules that are aligned in parallel in the absence of an electric field, the first transparent substrate and the second transparent substrate sandwich the liquid crystal layer from both sides, and the touch sensor The part is arranged between the liquid crystal layer and the first transparent substrate, the driving electrode and sensor part is arranged between the liquid crystal layer and the second transparent substrate; the polarizing film with the adhesive layer is not sandwiched by a conductive layer and penetrates The first adhesive layer is disposed on the side of the first transparent substrate on the viewing side of the built-in liquid crystal cell; wherein, the polarizing film to which the adhesive layer is attached has a first polarizing film, an anchor layer, and a first adhesive layer in this order , the anchor layer has a conductive polymer, and the first adhesive layer contains an antistatic agent.

Description

Built-in liquid crystal panel and liquid crystal display device Field of Invention

The present invention relates to a built-in liquid crystal cell incorporating a touch-sensing function inside the liquid crystal cell, and a built-in liquid crystal panel having a polarizing film with an adhesive layer on the viewing side of the built-in liquid crystal cell. Furthermore, the present invention relates to a liquid crystal display device using the liquid crystal panel. The liquid crystal display device with a touch sensing function using the built-in liquid crystal panel of the present invention can be used as various input display devices such as mobile devices.

Background of the Invention

The liquid crystal display device is generally attached with polarizing films on both sides of the liquid crystal cell via an adhesive layer according to its image forming method. In addition, products incorporating a touch panel on a display screen of a liquid crystal display device have been put into practical use. As far as touch panels are concerned, there are various formats such as capacitive type, resistive film type, optical type, ultrasonic type or electromagnetic induction type. Recently, capacitive type is mostly used. In recent years, a liquid crystal display device with a touch-sensing function embedded with a capacitive sensor has been widely used as the touch-sensing part.

In terms of manufacturing a liquid crystal display device, when the aforementioned polarizing film with an adhesive layer is attached to a liquid crystal cell, the release film is peeled off from the adhesive layer of the polarizing film with an adhesive layer, and the peeling of the release film produces Static electricity. The resulting static electricity will affect the internal The alignment of the liquid crystal layer leads to adverse consequences. Therefore, for example, by forming an antistatic layer on the outside of the polarizing film, the generation of static electricity can be suppressed.

On the other hand, the capacitive sensor of the liquid crystal display device with touch sensing function is used to detect the weak capacitance formed by the transparent electrode pattern and the finger when the user's finger approaches the surface. If there is a conductive layer such as an antistatic layer between the above-mentioned transparent electrode pattern and the user's finger, the electric field between the driving electrode and the sensor electrode will be disturbed, resulting in unstable sensor electrode capacitance, reducing the sensitivity of the touch panel and becoming a cause of failure. For a liquid crystal display device with a touch sensing function, it is necessary to suppress the generation of static electricity and the failure of the capacitive sensor. For example, in view of the aforementioned problems, some literatures propose to arrange a polarizing film on the viewing side of the liquid crystal layer in a liquid crystal display device with touch sensing function to reduce the occurrence of poor display or failure. The polarizing film has a surface resistance value of 1.0×10 Antistatic layer of ⁹ to 1.0×10 ¹¹ Ω/□ (Patent Document 1).

prior art literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2013-105154

Summary of Invention

With the polarizing film having an antistatic layer described in Patent Document 1, the generation of static electricity can be suppressed to some extent. However, in Patent Document 1, since the place where the antistatic layer is disposed is shifted from the fundamental position where static electricity is generated, the effect is not as good as that of imparting an antistatic function to the adhesive layer. It is also known that when a built-in liquid crystal cell is used, In the liquid crystal display device with touch sensing function, the conduction structure can be provided on the side of the polarizing film, which can give conduction from the side. However, when the antistatic layer is very thin, the contact area between the side and the conduction structure is small, which cannot be obtained. Sufficient conductivity to cause conduction failure. On the other hand, once the antistatic layer becomes thicker, the sensitivity of the touch sensor will decrease.

In addition, the adhesive layer endowed with antistatic function can suppress the generation of static electricity more than the antistatic layer provided on the polarizing film, and can effectively prevent unevenness of static electricity. However, it is known that once the conductive function of the adhesive layer is improved because the antistatic function of the adhesive layer is emphasized, the sensitivity of the touch sensor will be reduced. Especially in a liquid crystal display device with a built-in liquid crystal unit with a touch sensing function, the sensitivity of the touch sensor will decrease. In addition, it is known that the antistatic agent blended in the adhesive layer for the purpose of improving the conductive function will segregate at the interface with the polarizing film or move to the viewing side of the liquid crystal cell in a humidified environment (after the humidification reliability test). interface, lack of durability.

The purpose of the present invention is to provide a built-in liquid crystal panel, which has a built-in liquid crystal cell and a polarizing film with an adhesive layer applied on the viewing side of the built-in liquid crystal panel. The built-in liquid crystal panel has good antistatic function and can satisfy the touch feeling. Sensor sensitivity and durability in humidified environments.

Another object of the present invention is to provide a liquid crystal display device using the built-in liquid crystal panel.

The inventors of the present invention have found that the above-mentioned problems can be solved by the following built-in liquid crystal panel as a result of earnest research in order to solve the above-mentioned problems, and have completed the present invention.

That is, the present invention relates to a built-in liquid crystal panel, which is characterized by having a built-in liquid crystal cell including a liquid crystal layer, a first transparent substrate and a second transparent substrate, a touch sensor portion, and a drive electrode-cum-sensor portion. , the liquid crystal layer contains liquid crystal molecules with homogenious alignment in the absence of an electric field, the first transparent substrate and the second transparent substrate sandwich the liquid crystal layer from both sides, and the touch sensor part is arranged on Between the liquid crystal layer and the first transparent substrate, the driving electrode and the sensor part are arranged between the liquid crystal layer and the second transparent substrate; and the polarizing film with the adhesive layer is not sandwiched by the conductive layer and passes through the first transparent substrate The adhesive layer is arranged on the side of the first transparent substrate on the viewing side of the built-in liquid crystal cell; wherein, the polarizing film with the adhesive layer has a first polarizing film, an anchor layer, and a first adhesive layer in sequence; the aforementioned The anchor layer has a conductive polymer, and the first adhesive layer contains an antistatic agent.

In the built-in liquid crystal panel, a conduction structure may be provided on the side surfaces of the anchor layer and the first adhesive layer of the polarizing film with the adhesive layer.

In the built-in liquid crystal panel, the anchor layer is preferably 0.01-0.5 μm in thickness and has a surface resistance of 1×10 ⁸ —1×10 ¹² Ω/□; the first adhesive layer is preferably 5-100 μm in thickness and has a surface resistance The value is 1×10 ⁸ ~1×10 ¹² Ω/□; and the surface resistance value of the polarizing film with the adhesive layer on the adhesive layer side is preferably 1×10 ⁸ ~1×10 ¹¹ Ω/□.

In the built-in liquid crystal panel, a second polarizing film disposed through the second adhesive layer is provided on the second transparent substrate side of the built-in liquid crystal cell.

In the built-in liquid crystal panel, the antistatic agent may contain an alkali metal salt and/or an organic cation-anion salt.

Furthermore, the present invention relates to a liquid crystal display device having the aforementioned built-in liquid crystal panel.

The polarizing film attached to the adhesive layer on the viewing side of the built-in liquid crystal panel of the present invention contains a conductive polymer in the anchor layer and an antistatic agent in the adhesive layer to be endowed with antistatic function. Therefore, in the built-in liquid crystal panel When the conducting structure is provided on the respective side surfaces of the anchor layer and the adhesive layer, the conducting structure can be contacted and the contact area can be sufficiently ensured. Therefore, the conduction between the side surfaces of the anchor layer and the adhesive layer can be ensured, thereby suppressing static electricity unevenness due to poor conduction.

In addition, the polarizing film with the adhesive layer of the present invention controls the surface resistance value of each layer of the anchor layer and the adhesive layer within a predetermined range, and the surface resistance on the adhesive layer side of the polarizing film with the adhesive layer can also be controlled. The value is controlled within a predetermined range. In this way, the polarizing film with the adhesive layer of the present invention can be controlled not to reduce the sensitivity of the touch sensor and the durability in a humidified environment, but also to reduce the surface resistance of the anchor layer and the adhesive layer. value to give a predetermined antistatic function. Therefore, the polarizing film with the adhesive layer of the present invention has good antistatic function and can satisfy the touch feeling at the same time. Sensor sensitivity and durability in humidified environments.

1: The first polarizing film

2: 1st adhesive layer

3: Anchor Layer

4: Surface treatment layer

11: The second polarizing film

12: The second adhesive layer

20: Liquid crystal layer

31: Touch sensor part

32: Drive electrode and sensor part

41: The first transparent substrate

42: Second transparent substrate

50, 51: Conduction structure

A: Polarizing film with adhesive layer

B: Built-in liquid crystal cell

C: Built-in LCD panel

FIG. 1 is a cross-sectional view showing an example of a polarizing film with an adhesive layer used on the viewing side of the built-in liquid crystal panel of the present invention.

FIG. 2 is a cross-sectional view showing an example of the built-in type liquid crystal panel of the present invention.

Form for carrying out the invention

The present invention will be described below with reference to the drawings. As shown in FIG. 1 , the polarizing film A of the adhesive layer used on the viewing side of the built-in liquid crystal panel of the present invention has a first polarizing film 1 , an anchor layer 3 , and a first adhesive layer 2 in this order. In addition, the surface treatment layer 4 may be provided on the side of the first polarizing film 1 on which the anchor layer 3 is not provided. In FIG. 1 , the polarizing film A of the adhesive layer-attached series has a surface treatment layer 4 . As shown in FIG. 2 , the adhesive layer-attached polarizing film A of the present invention can be disposed on the transparent substrate 41 side on the viewing side of the built-in liquid crystal cell B through the aforementioned adhesive layer 2 . 1, but the polarizing film A with the adhesive layer of the present invention can be provided with a separator on the first adhesive layer 2, and can be placed on the surface treatment layer 4 (if there is no surface treatment layer 4, it can be placed in 1st polarizing film 1) A surface protection film is provided.

From the viewpoint of the stability of the surface resistance value and the adhesion with the adhesive layer, the thickness of the anchor layer 3 is preferably 0.01-0.5 μm, preferably 0.01-0.2 μm, more preferably 0.01-0.1 μm. In addition, from the viewpoint of antistatic function and touch sensor sensitivity, the surface resistance of the anchor layer 3 is preferably 1×10 ⁸ ~1×10 ¹² Ω/□, 1×10 ⁸ ~1×10 ¹¹ Ω/□ is better, 1×10 ⁸ ~1×10 ¹⁰ Ω/□ is better.

From the viewpoint of securing durability and securing the contact area with the side conductive structure, the thickness of the first adhesive layer 2 is preferably 5-100 μm, preferably 5-50 μm, and more preferably 10-35 μm. In addition, from the viewpoint of antistatic function and touch sensor sensitivity, the surface resistance of the first adhesive layer 2 is preferably 1×10 ⁸ ~1×10 ¹² Ω/□, 1×10 ⁸ ~1 ×10 ¹¹ Ω/□ is better, 1×10 ⁸ to 1×10 ¹⁰ Ω/□ is better.

In addition, the surface resistance value of the adhesive layer 2 side of the polarizing film A with the adhesive layer should be controlled to be 1×10 ⁸ ~1×10 ¹¹ Ω/□, so as to satisfy the antistatic function without reducing the touch feeling. sensor sensitivity, or reduce durability in humidified environments. The surface resistance value can be adjusted by individually controlling the surface resistance values of the anchor layer 3 and the first adhesive layer 2 . The aforementioned surface resistance value is preferably 1×10 ⁸ to 6×10 ¹⁰ Ω/□, more preferably 1×10 ⁸ to 4×10 ¹⁰ Ω/□.

The polarizing film A with the adhesive layer is explained below. As mentioned above, the polarizing film A of the adhesive layer of the present invention has the first polarizing film 1 , the anchor layer 3 , and the first adhesive layer 2 in this order. In addition, the surface treatment layer 4 may be provided.

<1st polarizing film>

The first polarizing film generally uses a polarizer with a transparent protective film on one side or both sides. The polarizer is not particularly limited, and various substances can be used. Polarizers include dichroic substances that adsorb iodine or dichroic dyes on hydrophilic polymer films such as polyvinyl alcohol-based films, partially formaldehyde polyvinyl alcohol-based films, and ethylene-vinyl acetate copolymer-based partially saponified films. And uniaxially stretched, and the dehydration of polyvinyl alcohol or the dehydrochloric acid of polyvinyl chloride Physical and other polyene-based alignment films, etc. Among these, a polarizer composed of a polyvinyl alcohol-based film and a dichroic substance such as iodine is preferable. The thickness of these polarizers is not particularly limited, and is generally below about 80 μm.

Also, as the polarizer, a thin polarizer with a thickness of 10 μm or less can be used. From the viewpoint of thinning, the thickness is preferably 1 to 7 μm. Such a thin polarizer has less thickness unevenness, good visibility, and little dimensional change, so it has excellent durability, and it is also suitable for thinning the thickness of the polarizing film.

As the material constituting the transparent protective film, for example, thermoplastic resins excellent in transparency, mechanical strength, thermal stability, moisture barrier properties, and isotropy can be used. Specific examples of such thermoplastic resins include cellulose resins such as cellulose triacetate, polyester resins, polyether resins, polyether resins, polycarbonate resins, polyamide resins, polyimide resins, and polyolefins. Resins, (meth)acrylic resins, cyclic polyolefin resins (norbornene-based resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof. In addition, the transparent protective film can be attached to one side of the polarizer through the adhesive layer, and the other side can use (meth)acrylic, urethane, urethane acrylate, epoxy, Thermosetting resins such as polysiloxanes or UV-curable resins are used as transparent protective films. One or more optional and appropriate additives may be contained in the transparent protective film.

The adhesive layer for bonding the polarizer and the transparent protective film is not particularly limited as long as it is optically transparent, and various forms such as water-based, solvent-based, hot-melt-based, radical-curable, and cation-curable can be used. , Water based adhesives or free radical hardening adhesives are suitable.

<Antistatic agent>

Examples of the antistatic agent include materials capable of imparting antistatic properties, such as ionic surfactants, conductive polymers, and conductive fine particles. Moreover, an ionic compound can be used as an antistatic agent.

Examples of ionic surfactants include cationic surfactants (for example, quaternary ammonium salt type, phosphonium salt type, perilinium salt type, etc.), anionic surfactants (carboxylic acid type, sulfonate type, sulfate type, phosphate type, phosphorous acid type, etc.) salt type, etc.), zwitterionic type (sulfobetaine type, alkyl betaine type, alkyl imidazolinium betaine type, etc.) or nonionic type (polyol derivatives, β-cyclodextrin inclusion compounds, Sorbitan fatty acid monoesters, diesters, polyalkylene oxide derivatives, amine oxides, etc.) various surfactants.

啉系等之聚合物，該等中又宜使用容易成為水溶性導電性聚合物或水分散性導電性聚合物之聚苯胺、聚噻吩等。尤以聚噻吩為宜。 Examples of conductive polymers include polyaniline-based, polythiophene-based, polypyrrole-based, and polyquinoline

For polymers such as linoline-based polymers, among these, polyaniline, polythiophene, etc., which easily become water-soluble conductive polymers or water-dispersible conductive polymers, are preferably used. Especially polythiophene is suitable.

Moreover, metal oxides, such as a tin oxide type, an antimony oxide type, an indium oxide type, and a zinc oxide type, are mentioned as electroconductive microparticles|fine-particles. Among these, the tin oxide system is suitable. Examples of tin oxide-based substances include antimony-doped tin oxide, indium-doped tin oxide, aluminum-doped tin oxide, tungsten-doped tin oxide, and titanium oxide-ceria-tin oxide in addition to tin oxide. composites, titanium oxide-tin oxide composites, etc. The average particle size of the fine particles is about 1 to 100 nm, preferably 2 to 50 nm.

In addition, the antistatic agent other than the above includes: acetylene black, Ketjen black (Ketjen black), natural graphite, artificial graphite, Titanium black or monomers with cationic (four-level ammonium salts, etc.), zwitterionic (betaine compounds, etc.), anionic (sulfonates, etc.) or nonionic (glycerol, etc.) ion conductive groups are all monomers. Polymers or copolymers of the monomer and other monomers, ionically conductive polymers with 4-stage ammonium salt groups having acrylate or methacrylate moieties, etc.; polyethylene methacrylic acid Hydrophilic polymers such as ester copolymers are alloyed to acrylic resins and other types of permanent antistatic agents.

≪Ionic compounds≫

Moreover, as an ionic compound, an alkali metal salt and/or an organic cation-anion salt can be used suitably. As the alkali metal salt, organic salts and inorganic salts of alkali metals can be used. In addition, the "organic cation-anion salt" in the present invention is an organic salt, which means that the cation part is composed of an organic substance, and the anion part may be an organic substance or an inorganic substance. "Organic cation-anion salts" are also referred to as ionic liquids and ionic solids.

<Alkali metal salt>

Examples of the alkali metal ions constituting the cation moiety of the alkali metal salt include lithium, sodium, and potassium ions. Among these alkali metal ions, lithium ions are suitable.

The anion part of the alkali metal salt may be composed of an organic substance or an inorganic substance. As the anion moiety constituting the organic salt, for example, CH ₃ COO ^- , CF ₃ COO ^- , CH ₃ SO ₃ ^- , CF ₃ SO ₃ ^- , (CF ₃ SO ₂ ) ₃ C ^- , C ₄ F ₉ SO ₃ ^- , C ₃ F ₇ COO ^- , (CF ₃ SO ₂ )(CF ₃ CO)N ^- , ^- O ₃ S(CF ₂ ) ₃ SO ₃ ^- , PF ₆ ^- , CO ₃ ^2- or the following general formula (1) to (4) Those shown, etc.

(1): (C _n F _2n+1 SO ₂ ) ₂ N ^- (only, n is an integer from 1 to 10), (2): CF ₂ (C _m F _2m SO ₂ ) ₂ N ^- (only, m is an integer from 1 to 10), (3): ^- O ₃ S(CF ₂ ) _l SO ₃ ^- (but, l is an integer from 1 to 10), (4): (C _p F _2p+1 SO ₂ ) N ^- (C _q F _2q+1 SO ₂ ) (only, p and q are integers from 1 to 10). In particular, since the anion part containing a fluorine atom can obtain an ionic compound with good ion dissociation property, it is preferably used. Cl ^- , Br ^- , I ^- , AlCl ₄ ^- , Al ₂ Cl ₇ ^- , BF ₄ ^- , PF ₆ ^- , ClO ₄ ^- , NO ₃ ^- , AsF ₆ ^- , SbF ₆ ^- can be used for the anion moiety constituting the inorganic salt. , NbF ₆ ^- , TaF ₆ ^- , (CN) ₂ N ^- and the like. The anion moiety is preferably a (perfluoroalkylsulfonyl)imide represented by the aforementioned general formula (1) such as (CF ₃ SO ₂ ) ₂ N ^- , (C ₂ F ₅ SO ₂ ) ₂ N ^- and the like , especially (CF ₃ SO ₂ ) ₂ N ^- represented (trifluoromethanesulfonyl)imide.

Specific examples of the organic salts of alkali metals include sodium acetate, sodium alginate, sodium lignosulfonate, sodium toluenesulfonate, LiCF ₃ SO ₃ , Li(CF ₃ SO ₂ ) ₂ N, and Li(CF ₃ SO ₂ ) ₂ N , Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C4F ₉ SO ₂ ) ₂ N, Li(CF ₃ SO ₂ ) ₃ C, KO ₃ S(CF ₂ ) ₃ SO ₃ K, LiO ₃ S(CF ₂ ) ₃ SO ₃ K, etc., among which LiCF ₃ SO ₃ , Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N , Li(CF ₃ SO ₂ ) ₃ C, etc. are suitable, Li(CF ₃ SO ₂ ) ₂ N, Li(C ₂ F ₅ SO ₂ ) ₂ N, Li(C ₄ F ₉ SO ₂ ) ₂ N and the like contain fluorine Lithium imide salts are preferred, and (perfluoroalkylsulfonyl) imide lithium salts are particularly preferred.

Moreover, as an inorganic salt of an alkali metal, lithium perchlorate and lithium iodide are mentioned.

<Organic cation-anion salt>

The organic cation-anion salt used in the present invention is composed of a cationic component and an anionic component, and the cationic component is composed of an organic substance become. Specific examples of the cationic component include: pyridinium cation, piperidinium cation, pyrrolidinium cation, cation having a pyrroline skeleton, cation having a pyrrole skeleton, imidazolium cation, tetrahydro Pyrimidinium (tetrahydropyrimidinium) cation, dihydropyrimidinium cation, pyrazolium (pyrazolium) cation, pyrazolinium (pyrazolinium) cation, tetraalkylammonium cation, trialkyl perionium cation, tetraalkylphosphonium cation and the like.

As the anion component, for example, Cl ^- , Br ^- , I ^- , AlCl ₄ ^- , Al ₂ Cl ₇ ^- , BF ₄ ^- , PF ₆ ^- , ClO ₄ ^- , NO ₃ ^- , CH ₃ COO ^- , CF ₃ COO ^- , CH ₃ SO ₃ ^- , CF ₃ SO ₃ ^- , (CF ₃ SO ₂ ) ₃ C ^- , AsF ₆ ^- , SbF ₆ ^- , NbF ₆ ^- , TaF ₆ ^- , (CN) ₂ N ^- , C ₄ F ₉ SO ₃ ^- , C ₃ F ₇ COO ^- , ((CF ₃ SO ₂ )(CF ₃ CO)N ^- , ^- O ₃ S(CF ₂ ) ₃ SO ₃ ^- and those represented by the following general formulae (1) to (4) Shower, etc.

(1): (C _n F _2n+1 SO ₂ ) ₂ N ^- (only, n is an integer from 1 to 10), (2): CF ₂ (C _m F _2m SO ₂ ) ₂ N ^- (only, m is an integer from 1 to 10), (3): ^- O ₃ S(CF ₂ ) _l SO ₃ ^- (but, l is an integer from 1 to 10), (4): (C _p F _2p+1 SO ₂ ) N ^- (C _q F _2q+1 SO ₂ ) (only, p and q are integers from 1 to 10). Among them, the anion component containing a fluorine atom can obtain an ionic compound having good ion dissociation property, and it is therefore preferable to use it.

In addition to the aforementioned alkali metal salts and organic cation-anion salts, the ionic compounds include inorganic salts such as ammonium chloride, aluminum chloride, cupric chloride, ferrous chloride, ferric chloride, and ammonium sulfate. the plasma The active compounds may be used alone or in combination.

<anchor layer>

As mentioned above, the anchor layer is preferably formed to have a thickness of 0.01 to 0.5 μm and a surface resistance value of 1×10 ⁸ to 1×10 ¹² Ω/□. The anchor layer can be formed from various antistatic agent compositions. Conductive polymers can be used as antistatic agents to form the anchor layer.

From the viewpoints of optical properties, appearance, antistatic effect, and stability of the antistatic effect during heating and humidification, conductive polymers are preferably used among these antistatic agents. In particular, water-soluble conductive polymers or water-dispersible conductive polymers such as polyaniline and polythiophene are preferably used. Since the water-soluble conductive polymer or the water-dispersible conductive polymer can prepare the coating liquid for forming the antistatic layer into an aqueous solution or a water dispersion liquid, the coating liquid does not need to use a non-aqueous organic solvent, and can suppress the optical film base. The material is due to the deterioration of the organic solvent. In addition, the aqueous solution or the aqueous dispersion may contain an aqueous solvent other than water. For example, methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, secondary butanol, tertiary butanol, n-amyl alcohol, isoamyl alcohol, secondary amyl alcohol, and tertiary amyl alcohol can be mentioned. Alcohols, 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol, cyclohexanol and other alcohols.

Moreover, it is preferable that the water-soluble conductive polymer or water-dispersible conductive polymer such as polyaniline and polythiophene has a hydrophilic functional group in the molecule. Examples of the hydrophilic functional group include a phosphonium group, an amino group, an amide group, an imino group, a quaternary ammonium salt group, a hydroxyl group, a mercapto group, a hydrazine group, a carboxyl group, a sulfate group, a phosphate group, or a salt thereof. Because of the hydrophilic functional group in the molecule, it can be easily dissolved in water or can be easily dispersed in water in the form of particles. The aforementioned water-soluble conductive polymer or water-dispersible conductive polymer is easily prepared.

Examples of commercially available water-soluble conductive polymers include polyaniline sulfonic acid (manufactured by Mitsubishi Rayon Co., Ltd., polystyrene-equivalent weight average molecular weight of 150,000). Examples of commercially available water-dispersible conductive polymers include polythiophene-based conductive polymers (manufactured by Nagase ChemteX Co., Ltd., trade name Denatron series).

唑啉基聚合物、聚胺甲酸乙酯系樹脂、聚酯系樹脂、丙烯酸系樹脂、聚醚系樹脂、纖維素系樹脂、聚乙烯醇系樹脂、環氧樹脂、聚乙烯基吡咯啶酮、聚苯乙烯系樹脂、聚乙二醇、新戊四醇等。尤以聚胺甲酸乙酯系樹脂、聚酯系樹脂、丙烯酸系樹脂為宜。該等黏結劑可依其用途適當使用1種或2種以上。 In addition, as for the material for forming the anchor layer, for the purpose of forming a film of the conductive polymer and improving the adhesion to the optical film, a binder component may be added together with the conductive polymer. When the conductive polymer is a water-soluble conductive polymer or a water-based material of a water-dispersible conductive polymer, a water-soluble or water-dispersible binder component is used. Examples of the binder include

oxazoline-based polymers, polyurethane-based resins, polyester-based resins, acrylic resins, polyether-based resins, cellulose-based resins, polyvinyl alcohol-based resins, epoxy resins, polyvinylpyrrolidone, Polystyrene resin, polyethylene glycol, neotaerythritol, etc. In particular, polyurethane-based resins, polyester-based resins, and acrylic-based resins are suitable. These binders can be appropriately used 1 type or 2 or more types according to the application.

The amount of the conductive polymer and the binder used depends on the types of them, but it should be controlled so that the surface resistance of the obtained anchor layer becomes 1×10 ⁸ to 1×10 ¹² Ω/□.

<1st adhesive layer>

As described above, the first adhesive layer is preferably formed to have a thickness of 5 to 100 μm and a surface resistance of 1×10 ⁸ to 1×10 ¹² Ω/□. The first adhesive layer may be formed of a composition in which various adhesives are blended with an antistatic agent.

Various adhesives can be used as the adhesive for forming the first adhesive layer, for example, rubber-based adhesives, acrylic-based adhesives, polysiloxane-based adhesives, urethane-based adhesives, vinyl alkyl ether-based adhesives Adhesives, polyvinylpyrrolidone-based adhesives, polyacrylamide-based adhesives, cellulose-based adhesives, etc. The adhesive base polymer can be selected according to the type of the aforementioned adhesive. Among the above-mentioned adhesives, acrylic adhesives are preferably used from the viewpoints of good optical transparency, moderate wettability, cohesiveness, and adhesive properties, and excellent weather resistance and heat resistance.

The aforementioned acrylic adhesive contains a (meth)acrylic polymer as a base polymer. A (meth)acrylic-type polymer normally contains an alkyl (meth)acrylate as a main component as a monomer unit. In addition, (meth)acrylate means an acrylate and/or a methacrylate, and the (meth) table of this invention has the same meaning.

The (meth)acrylic-acid alkyl ester which comprises the main skeleton of a (meth)acrylic-type polymer can be mentioned the thing of the C1-C18 thing of a linear or branched alkyl group. These may be used alone or may be used in combination. The average carbon number of these alkyl groups is preferably 3-9.

In addition, from the viewpoints of adhesive properties, durability, adjustment of retardation, adjustment of refractive index, etc., aromatic ring-containing compounds such as phenoxyethyl (meth)acrylate and benzyl (meth)acrylate can be used. Alkyl (meth)acrylate.

Among the aforementioned (meth)acrylic polymers, in improving the viscosity For the purpose of adhesion and heat resistance, one or more comonomers having a polymerizable functional group of an unsaturated double bond such as a (meth)acryloyl group or a vinyl group can be introduced by copolymerization. Specific examples of such comonomers include: 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, (meth)acrylic acid 6-Hydroxyhexyl, 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)acrylate and (4-hydroxymethylcyclohexyl)-methyl Hydroxyl-containing monomers such as acrylic acid ester; (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itonic acid, maleic acid, fumaric acid, crotonic acid and other carboxyl-containing monomers Monomers; anhydride group-containing monomers such as maleic anhydride and itonic anhydride; acrylic acid caprolactone adducts; styrene sulfonic acid or allyl sulfonic acid, 2-(meth)acrylamido-2-methyl sulfonic acid group-containing monomers such as propanesulfonic acid, (meth)acrylamidopropanesulfonic acid, sulfopropyl (meth)acrylate, (meth)acryloyloxynaphthalenesulfonic acid; 2-hydroxyethyl Acryloyl phosphate and other phosphoric acid group-containing monomers, etc.

Moreover, the following monomer examples for the purpose of modification can also be mentioned: (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-butyl(meth)acrylamide and (N-substituted) amide monomers such as N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide; ) (meth)acrylic acid alkyl amine alkyl ester monomers such as N,N-dimethylaminoethyl acrylate, (meth)acrylic acid tertiary butylamine ethyl ester; (meth)acrylic acid methoxyethyl ester, (Meth)acrylic acid alkoxyalkyl ester monomers such as ethoxyethyl acrylate; N-(meth)acrylic acid oxymethylene succinimide and N-(meth)acrylic acid yl-6-oxyhexamethylenesuccinimide, N-(meth)acryloyl-8-oxyoctamethylenesuccinimide, N- Succinimide-based monomers such as acryloyl mofolin; N-cyclohexylmaleimide and N-isopropylmaleimide, N-laurylmaleimide and N-phenyl Maleimide and other maleimide monomers; N-methyl ikonimide, N-ethyl ikonimide, N-butyl ikonimide, N-octyl Iconimide monomers such as canimide, N-2-ethylhexyliconimine, N-cyclohexyliconimine, N-lauryl iconimine, etc.

、乙烯吡

、乙烯吡咯、乙烯咪唑、乙烯

唑、乙烯嗎福林、N-乙烯基羧醯胺類、苯乙烯、α-甲基苯乙烯、N-乙烯己內醯胺等乙烯基系單體；丙烯腈、甲基丙烯腈等氰基丙烯酸酯系單體；(甲基)丙烯酸環氧丙酯等含環氧基丙烯酸系單體；(甲基)丙烯酸聚乙二醇、(甲基)丙烯酸聚丙二醇、(甲基)丙烯酸甲氧基乙二醇、(甲基)丙烯酸甲氧基聚丙二醇等二醇系丙烯酸酯單體；(甲基)丙烯酸四氫糠酯、氟(甲基)丙烯酸酯、聚矽氧(甲基)丙烯酸酯及2-甲氧乙基丙烯酸酯等丙烯酸酯系單體等。此外，可列舉異戊二烯、丁二烯、異丁烯、乙烯基醚等。 In addition, the following monomers can also be used as modified monomers: vinyl acetate, vinyl propionate, N-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinyl Piper

, vinylpyridine

, vinylpyrrole, vinylimidazole, ethylene

Vinyl monomers such as azoles, vinylmorphine, N-vinylcarboxyamides, styrene, α-methylstyrene, N-vinylcaprolactamide, etc.; cyano groups such as acrylonitrile and methacrylonitrile Acrylate monomers; epoxy-containing acrylic monomers such as glycidyl (meth)acrylate; (meth)acrylic acid polyethylene glycol, (meth)acrylic acid polypropylene glycol, (meth)acrylic acid methoxy Ethylene glycol, (meth)acrylic acid methoxy polypropylene glycol and other glycol-based acrylate monomers; (meth) tetrahydrofurfuryl acrylate, fluoro (meth) acrylate, polysiloxane (meth) acrylic acid Acrylate monomers such as ester and 2-methoxyethyl acrylate, etc. Moreover, isoprene, butadiene, isobutylene, vinyl ether, etc. are mentioned.

Further, the copolymerizable monomers other than the above-mentioned ones include silicon atom-containing silane-based monomers and the like. Silane-based monomers include, for example, 3-propenyloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, and 4-vinylbutyltriethoxysilane. Ethoxysilane, 8-Vinyloctyltrimethoxysilane, 8-Vinyloctyltriethoxysilane alkane, 10-methacryloyloxydecyltrimethoxysilane, 10-acryloyloxydecyltrimethoxysilane, 10-methacryloyloxydecyltriethoxysilane, 10-acryloyloxydecyl triethoxysilane, etc.

In addition, the following monomers can also be used as comonomers: tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bis(meth)acrylate Phenol A Diglycidyl Ether Di(meth)acrylate, Neopentyl Glycol Di(meth)acrylate, Trimethylolpropane Tri(meth)acrylate, Neotaerythritol Tri(meth)acrylic Acid Esters, neopentaerythritol tetra(meth)acrylate, dipivalerythritol penta(meth)acrylate, dipivalerythritol hexa(meth)acrylate, caprolactone-modified dipeptaerythritol Polyfunctional monomers having 2 or more (meth)acryloyl groups, vinyl groups and other unsaturated double bonds, such as esters of (meth)acrylic acid such as hexa(meth)acrylate and polyhydric alcohols; and in polyesters , Polyester (meth)acrylates with 2 or more (meth)acryloyl, vinyl and other unsaturated double bonds added to the backbone as the same functional group as the monomer components, Epoxy (meth)acrylate, urethane (meth)acrylate, etc.

The (meth)acrylic polymer has an alkyl (meth)acrylate as the main component in the weight ratio of the total constituent monomers, and the ratio of the aforementioned comonomer in the (meth)acrylic polymer is not particularly Restriction, the ratio of the aforementioned comonomer accounts for about 0~20% of the weight ratio of the total monomers, preferably about 0.1~15%, more preferably about 0.1~10%.

From the viewpoint of adhesiveness and durability, among these comonomers, hydroxyl group-containing monomers and carboxyl group-containing monomers are preferably used. The hydroxyl group-containing monomer and the carboxyl group-containing monomer may be used in combination. When the adhesive composition contains a crosslinking agent, the and other comonomers will become reactive sites for reaction with the crosslinking agent. Hydroxyl-containing monomers, carboxyl-containing monomers, etc. are intermolecularly reactive with cross-linking agents, so they are very suitable for improving the cohesion and heat resistance of the obtained adhesive layer. From the viewpoint of reproducibility, the hydroxyl group-containing monomer is suitable, and from the viewpoint of both durability and reproducibility, the carboxyl group-containing monomer is suitable.

When the comonomer contains a hydroxyl group-containing monomer, its ratio is preferably 0.01 to 15% by weight, preferably 0.03 to 10% by weight, and more preferably 0.05 to 7% by weight. When the comonomer contains a carboxyl group-containing monomer, the ratio thereof is preferably 0.05 to 10% by weight, preferably 0.1 to 8% by weight, and more preferably 0.2 to 6% by weight.

The (meth)acrylic polymer of the present invention is generally used with a weight average molecular weight in the range of 500,000 to 3,000,000. In consideration of durability, especially heat resistance, a weight-average molecular weight of 700,000 to 2,700,000 is preferably used. It is more appropriate to use 800,000 to 2.5 million. If the weight average molecular weight is less than 500,000, it is unfavorable from the viewpoint of heat resistance. Moreover, if the weight average molecular weight exceeds 3 million, in order to adjust the viscosity for application|coating, a large amount of diluent solvent is required and cost increases, and it is unfavorable. In addition, the weight average molecular weight means the value calculated by GPC (Gel Permeation Chromatography) and calculated in terms of polystyrene.

For the production of such a (meth)acrylic polymer, known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations can be appropriately selected. In addition, the obtained (meth)acrylic polymer may be any of a random copolymer, a block copolymer, a graft copolymer, and the like.

In terms of the antistatic agent used to form the first adhesive layer, from the viewpoints of compatibility with the base polymer and transparency of the adhesive layer It can be seen that, in the above-mentioned examples, ionic compounds are preferred. In particular, in the case of using an acrylic adhesive using a (meth)acrylic polymer as a base polymer, an ionic compound is preferably used. From the viewpoint of antistatic function, the ionic compound is preferably an ionic liquid.

The amount of the aforementioned adhesive and antistatic agent to be used depends on their types, but should be controlled so that the surface resistance of the obtained first adhesive layer becomes 1×10 ⁸ to 1×10 ¹² Ω/□. For example, with respect to 100 parts by weight of the base polymer (such as (meth)acrylic polymer) of the adhesive, the antistatic agent (such as an ionic compound) is preferably used in the range of 0.05 to 20 parts by weight. Using more than 0.05 parts by weight of antistatic agent is quite suitable for improving antistatic performance. Further, the antistatic agent (B) is preferably 0.1 part by weight or more, more preferably 0.5 part by weight or more. From the viewpoint of satisfying durability, it is preferably used in an amount of 20 parts by weight or less, and more preferably used in an amount of 10 parts by weight or less.

Moreover, the adhesive composition which forms a 1st adhesive layer may contain the crosslinking agent corresponding to a base polymer. For example, when a (meth)acrylic polymer is used as a base polymer, an organic crosslinking agent or a polyfunctional metal chelate compound can be used as a crosslinking agent. As an organic crosslinking agent, an isocyanate type crosslinking agent, a peroxide type crosslinking agent, an epoxy type crosslinking agent, an imine type crosslinking agent, etc. are mentioned. Polyfunctional metal chelates are those in which polyvalent metals and organic compounds are covalently or coordinately bonded. Examples of polyvalent metal atoms include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, and the like. Atoms that can be covalently or coordinately bonded in organic compounds may be, for example, oxygen atoms and the like, and the organic compounds include alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, ketone compounds, and the like.

Relative to 100 parts by weight of the (meth)acrylic polymer, the use amount of the crosslinking agent is preferably 3 parts by weight or less, preferably 0.01 to 3 parts by weight, more preferably 0.02 to 2 parts by weight, and 0.03 to 1 part by weight. Parts by weight are better.

Moreover, a silane coupling agent and other additives may be contained in the adhesive composition which forms a 1st adhesive layer. For example, polyether compounds of polyalkylene glycols such as polypropylene glycol, powders such as colorants, pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, and levelers can be appropriately added according to the application. , softener, antioxidant, anti-aging agent, light stabilizer, ultraviolet absorber, polymerization inhibitor, inorganic or organic filler, metal powder, granular, foil, etc. In addition, a redox system in which a reducing agent is added can also be used within a controllable range. With respect to 100 parts by weight of the (meth)acrylic polymer, these additives are preferably used in a range of 5 parts by weight or less, more preferably 3 parts by weight or less, and more preferably 1 part by weight or less.

<Surface Treatment Layer>

The surface treatment layer may be provided on the side of the first polarizing film where the anchor layer is not provided. The surface treatment layer may be provided separately from the transparent protective film in addition to the transparent protective film used for the first polarizing film. For the aforementioned surface treatment layer, a hard coat layer, an anti-glare treatment layer, an anti-reflection layer, an anti-sticking layer and the like may be provided.

The aforementioned surface treatment layer is preferably a hard coat layer. As a material for forming the hard coat layer, for example, a thermoplastic resin or a material hardened by heat or radiation can be used. Examples of the aforementioned materials include thermosetting resins or UV-curable trees. Radiation curable resin such as grease and electron beam curable resin. Among these, an ultraviolet-curable resin is preferable, which can efficiently form a cured resin layer with a simple processing operation by curing treatment by ultraviolet irradiation. These curable resins include various resins such as polyester-based, acrylic-based, urethane-based, amide-based, polysiloxane-based, epoxy-based, and melamine-based resins, and include these monomers and oligomers , polymers, etc. Radiation-curable resins, especially ultraviolet-curable resins, are preferable from the viewpoints of rapid processing speed and less heat loss to the base material. Suitable UV-curable resins include those having UV-polymerizable functional groups, including 2 or more, particularly 3 to 6, acrylic monomers or oligomer components of these functional groups. In addition, a photopolymerization initiator may be blended with the ultraviolet curable resin.

In addition, the surface treatment layer may be provided with an anti-glare treatment layer or an anti-reflection layer for the purpose of improving visibility. In addition, an anti-glare treatment layer or an anti-reflection layer may be provided on the hard coat layer. The constituent material of the anti-glare treatment layer is not particularly limited, and for example, a radiation-curable resin, a thermosetting resin, a thermoplastic resin, or the like can be used. As the anti-reflection layer, titanium oxide, zirconium oxide, silicon oxide, magnesium fluoride and the like can be used. The antireflection layer may be provided with plural layers. In addition, an anti-adhesion layer etc. are mentioned as a surface treatment layer.

Conductivity can be imparted to the aforementioned surface treatment layer by containing an antistatic agent. As the antistatic agent, those shown in the foregoing examples can be used.

<Other layers>

In addition to the aforementioned layers, the polarizing film with the adhesive layer of the present invention can also be provided on the side surface of the first polarizing film on which the anchor layer is provided The easy-adhesion layer can be subjected to various easy-adhesion treatments such as corona treatment and plasma treatment.

The built-in type liquid crystal cell B and the built-in type liquid crystal panel C will be described below.

(Built-in type liquid crystal cell B)

As shown in FIG. 2, the built-in liquid crystal cell B includes a liquid crystal layer 20, a first transparent substrate 41 and a second transparent substrate 42 sandwiching the liquid crystal layer 20 from both sides. Liquid crystal molecules in parallel alignment. Furthermore, the touch sensor portion 31 is provided between the liquid crystal layer 20 and the first transparent substrate 41 , and the driving electrode and sensor portion 32 is provided between the liquid crystal layer 20 and the second transparent substrate 42 .

The liquid crystal layer 20 used for the built-in type liquid crystal cell B may use a liquid crystal layer containing liquid crystal molecules that are aligned in parallel in the absence of an electric field. As the liquid crystal layer 20, a liquid crystal layer of, for example, an IPS method is suitably used. In addition, the liquid crystal layer 20 can use any type of liquid crystal layer such as TN type, STN type, π type, and VA type. The thickness of the liquid crystal layer 20 is, for example, about 1.5 μm to 4 μm.

As described above, the built-in liquid crystal cell B has the touch sensor part 31 and the driving electrode and sensor part 32 inside the liquid crystal cell, and does not have the touch sensor part outside the liquid crystal cell. That is, the conductive layer (surface resistance value) is not provided on the side closer to the viewing side than the first transparent substrate 41 of the built-in liquid crystal cell B (the liquid crystal cell side than the first adhesive layer 2 of the built-in liquid crystal panel C). 1×10 ¹³ Ω/□ or less). In addition, although the built-in type liquid crystal panel C described in FIG. 2 shows the order of each structure, the built-in type liquid crystal panel C may appropriately have other structures. A color filter substrate may be provided on the liquid crystal cell (the first transparent substrate 41 ).

As a material for forming the aforementioned transparent substrate, for example, glass or a polymer film can be exemplified. Examples of the aforementioned polymer films include polyethylene terephthalate, polycycloolefin, polycarbonate, and the like. When the above-mentioned transparent substrate is formed of glass, the thickness thereof is, for example, about 0.1 mm to 1 mm. When the transparent substrate is formed of a polymer film, the thickness thereof is, for example, about 10 μm to 200 μm. The above-mentioned transparent substrate may have an easy-adhesion layer or a hard coat layer on its surface.

The touch sensor part 31 (capacitance sensor) and the driving electrode and sensor part 32 are formed as transparent conductive layers. The constituent materials of the aforementioned transparent conductive layer are not particularly limited, such as gold, silver, copper, platinum, palladium, aluminum, nickel, chromium, titanium, iron, cobalt, tin, magnesium, tungsten and other metals and alloys of these metals, etc. . In addition, the constituent materials of the transparent conductive layer include metal oxides of indium, tin, zinc, potassium, antimony, zirconium, and cadmium, and specifically include indium oxide, tin oxide, titanium oxide, cadmium oxide, and mixtures thereof Metal oxides, etc. Other metal compounds etc. which consist of copper iodide etc. can be used. The aforementioned metal oxides may further contain oxides of metal atoms shown in the above groups as required. For example, indium oxide (ITO) containing tin oxide, tin oxide containing antimony, etc. are suitably used, and ITO is especially suitable. ITO preferably contains 80 to 99% by weight of indium oxide and 1 to 20% by weight of tin oxide.

The touch sensor portion 31 is disposed between the first polarizing film 1 and the liquid crystal layer 20 , and usually a transparent electrode pattern can be formed on the first transparent substrate 41 (on the liquid crystal layer 20 side in the built-in liquid crystal cell B). With regard to the drive electrode-cum-sensor portion 32, a transparent electrode pattern may also be formed by a conventional method. The above-mentioned transparent electrode pattern is usually related to the winding formed at the end of the transparent substrate (routing wires; not shown) are electrically connected, and the above-mentioned windings are connected to a controller IC (not shown). The shape of the transparent electrode pattern can be any shape, such as stripe or rhombus, in addition to the comb shape. The height of the transparent electrode pattern is, for example, 10 nm to 100 nm, and the width is 0.1 mm to 5 mm.

(built-in LCD panel C)

As shown in FIG. 2 , the built-in liquid crystal panel C of the present invention may have a polarizing film A with an adhesive layer on the viewing side of the built-in liquid crystal cell B, and a second polarizing film 11 on the opposite side. The polarizing film A with the adhesive layer is disposed on the side of the first transparent substrate 41 of the built-in liquid crystal cell B through the first adhesive layer 2 without sandwiching the conductive layer. On the other hand, the second polarizing film 11 is disposed on the side of the second transparent substrate 42 of the built-in liquid crystal cell B through the second adhesive layer 12 . The first polarizing film 1 and the second polarizing film 11 of the polarizing film A with the adhesive layer are arranged on both sides of the liquid crystal layer 20 so that the transmission axes (or absorption axes) of the polarizers are orthogonal.

For the second polarizing film 11, those described in the first polarizing film 1 can be used. The second polarizing film 11 may be the same as that of the first polarizing film 1, or may be different.

The adhesive described in the first adhesive layer 2 can be used for the formation of the second adhesive layer 12 . As the adhesive for forming the second adhesive layer 12, the same thing as the first adhesive layer 2 may be used, or a different thing may be used. The thickness of the 2nd adhesive bond layer 12 is not specifically limited, For example, it is about 1-100 micrometers. It should be 2~50μm, more preferably 2~40μm, and more preferably 5~35μm.

Moreover, in the built-in liquid crystal panel C, on the side surfaces of the anchor layer 3 and the first adhesive layer 2 of the polarizing film A with the adhesive layer A conduction structure 50 may be provided. The conduction structure 50 may be provided on all the side surfaces of the anchor layer 3 and the first adhesive layer 2, or may be partially provided. In order to ensure the conduction on the side surface when the conduction structure is locally provided, the conduction structure should preferably be arranged at a ratio of 1 area % or more and ideally 3 area % or more of the area of the side surface. In addition to the above, as shown in FIG. 2 , a conductive material 51 may be provided on the side surfaces of the first polarizing film 1 and the surface treatment layer 4 .

With the above-mentioned conduction structure 50 , the potential can be connected to other appropriate positions from the side surfaces of the above-mentioned anchor layer 3 and the first adhesive layer 2 , thereby suppressing the generation of static electricity. Materials for forming the conductive structures 50 and 51 may include conductive pastes such as silver, gold or other metal pastes, and other conductive adhesives and any other suitable conductive materials may also be used. The conduction structure 50 may also be formed in a linear shape extending from the side surfaces of the anchor layer 3 and the first adhesive layer 2 . The conduction structure 51 can also be formed in the same linear shape.

In addition, the first polarizing film 1 arranged on the viewing side of the liquid crystal layer 20 and the second polarizing film 11 arranged on the opposite side of the viewing side of the liquid crystal layer 20 can be layered with other optical films according to the suitability of each arrangement position use. In addition, the aforementioned other optical films include, for example, reflective plates or anti-transmission plates, retardation plates (including wavelength plates such as 1/2 or 1/4), visual compensation films, brightness enhancement films, etc., which can be used to form liquid crystal display devices, etc. optical layer. These can be used in one layer or two or more layers.

(liquid crystal display device)

The liquid crystal display device using the built-in touch-sensing function of the built-in liquid crystal panel C of the present invention can appropriately use components for forming the liquid crystal display device, such as backlights or reflectors used in lighting systems.

Example

Hereinafter, the present invention will be specifically described with reference to production examples and examples, but the present invention is not limited to these examples. In addition, the parts and % in each example are based on weight. Hereinafter, all room temperature storage conditions not specified are 23° C. and 65% RH.

<Measurement of weight average molecular weight of (meth)acrylic polymer>

The weight average molecular weight (Mw) of the (meth)acrylic polymer was measured by GPC (gel permeation chromatography). Mw/Mn was also measured in the same manner.

. Analysis device: Tosoh Corporation, HLC-8120GPC

. Column: Tosoh Corporation, G7000H _XL +GMH _XL +GMH _XL

. Column size: each 7.8mmφ×30cm, total 90cm

. Column temperature: 40℃

. Flow: 0.8mL/min

. Injection volume: 100 μL

. Elution solution: tetrahydrofuran

. Detector: Differential Refractometer (RI)

. Standard sample: polystyrene

<Production of polarizing film>

A polyvinyl alcohol film with a thickness of 80 μm was placed between rollers with different speed ratios, dyed at 30° C., 0.3% concentration of iodine solution for 1 minute and extended to 3 times at the same time. After that, it was stretched while being immersed for 0.5 minutes in an aqueous solution containing boric acid at a concentration of 4% and potassium iodide at a concentration of 10% at 60° C. so that the total stretching ratio was 6 times. Next, at 30°C and containing 1.5% iodine After washing by immersing in an aqueous solution of potassium chloride for 10 seconds, it was dried at 50° C. for 4 minutes to obtain a polarizer with a thickness of 30 μm. The saponified cellulose triacetate film with a thickness of 80 μm was pasted on both sides of the polarizer using a polyvinyl alcohol-based adhesive to form a polarizing film.

<Formation of surface treatment layer>

A hard coat resin composition containing 100 parts of UV-curable acrylic resin (manufactured by DIC Co., UNIDIC 17-806), 3 parts of a photopolymerization initiator (manufactured by Ciba Specialty Chemicals, IRGACURE 184), and 100 parts of toluene was prepared. (coating liquid). The coating liquid was coated on one side of the polarizing film obtained above with a wire bar, and then heated and dried at 80° C. for 1 minute to form a coating film. Next, the coating film was irradiated with ultraviolet rays of 300 mJ/cm ² with a metal halide lamp to harden the coating film to form a hard coat layer with a film thickness of 5 μm.

(modified anchor layer forming material)

唑啉基丙烯酸聚合物之溶液(商品名：Epocros WS-700、(股)日本觸媒製)1份及水90.4份混合，調製出固體成分濃度為0.5重量%之錨定層形成用塗佈液。所得錨定層形成用塗佈液含有0.04重量%之聚噻吩系聚合物及0.25重量%之含

唑啉基丙烯酸聚合物。 8.6 parts of a solution (trade name: Denatron P-580W, manufactured by Nagase ChemteX Co., Ltd.) containing 10 to 50% by weight of a thiophene-based polymer in terms of solid content, containing

1 part of a solution of an oxazoline-based acrylic polymer (trade name: Epocros WS-700, manufactured by Nippon Shokubai Co., Ltd.) and 90.4 parts of water were mixed to prepare a coating for forming an anchor layer with a solid content concentration of 0.5% by weight. liquid. The obtained coating liquid for forming an anchor layer contained 0.04% by weight of a polythiophene-based polymer and 0.25% by weight of a

An oxazoline-based acrylic polymer.

(to form an anchor layer)

唑啉基丙烯酸聚合物。 The coating solution for forming an anchor layer was applied to one side (the side not provided with the hard coat layer) of the above-mentioned polarizing film so that the thickness after drying became the thickness shown in Table 1, and dried at 80° C. for 2 minutes to form Anchor layer. The obtained anchor layer contains 8% by weight of thiophene-based polymer and 50% by weight of thiophene-based polymer, respectively.

An oxazoline-based acrylic polymer.

(Preparation of acrylic polymer)

A monomer mixture was fed into a 4-neck flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler. The monomer mixture contained 74.8 parts of butyl acrylate, 23 parts of phenoxyethyl acrylate, and N-vinyl- 0.5 part of 2-pyrrolidone (NVP), 0.3 part of acrylic acid, and 0.4 part of 4-hydroxybutyl acrylate. Next, 0.1 part of 2,2'-azobisisobutyronitrile as a polymerization initiator was fed into 100 parts of the aforementioned monomer mixture (solid content) together with 100 parts of ethyl acetate, and nitrogen gas was introduced while stirring slowly for nitrogen substitution Then, the liquid temperature in the flask was maintained at around 55°C, and a polymerization reaction was performed for 8 hours to prepare an acrylic polymer solution having a weight average molecular weight (Mw) of 1.6 million and Mw/Mn=3.7.

(preparation of adhesive composition)

With respect to 100 parts of solid content of the acrylic polymer solution obtained above, lithium bis(trifluoromethanesulfonyl)imide manufactured by Mitsubishi Materials Co. as an ionic compound was blended in the amount shown in Table 1, and further 0.1 part of isocyanate crosslinking agent (TAKENATE D160N manufactured by Mitsui Chemicals Co., Ltd., trimethylolpropane hexamethylene diisocyanate), 0.3 part of benzyl peroxide (NYPER BMT manufactured by NOF Corporation), and γ-glycidoxy 0.2 part of propyl methoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.: KBM-403) to prepare an acrylic adhesive composition substance solution.

(to form an adhesive layer)

Next, the above-mentioned acrylic adhesive composition solution was coated on the polyethylene terephthalate film (separated) treated with polysiloxane-based release agent in such a way that the thickness of the adhesive layer after drying was the thickness shown in Table 1. Film: One side of Mitsubishi Chemical Polyester Film Co., Ltd., MRF38) was dried at 155° C. for 1 minute to form an adhesive layer on the surface of the separation film. The adhesive layer is then transferred to the polarizing film with the anchor layer or the polarizing film without the anchor layer.

Examples 1 to 8 and Comparative Examples 1 to 4

An anchor layer and an adhesive layer were sequentially formed on one side (the side not provided with the hard coat layer) of the above-obtained polarizing film with the combination shown in Table 1, and a polarizing film with an adhesive layer was produced.

On the other hand, in Comparative Example 1, the conductive polymer was not blended in the coating liquid for forming an anchor layer.

In Comparative Examples 2 and 3, the ionic compound was not blended in the preparation of the adhesive composition.

The formation of the anchor layer of Comparative Example 4 was carried out as follows.

100 g of dipivaloerythritol hexaacrylate, 10 g of a photoinitiator (IRGACURE 184, manufactured by Ciba Specialty Chemicals), 100 g of methanol, and 100 g of propylene glycol monomethyl ether (PGM) were thoroughly mixed and stirred with a stirrer for about 1 hour. It mixes evenly. Next, 40 g of the AZO dispersion liquid was slowly dropped into the prepared stirring liquid, and the stirring liquid was stirred for about 1 hour to be sufficiently mixed to produce a coating liquid. Then, using a bar coater, the obtained coating solution was coated on a cellulose triacetate film with a thickness of 4 μm after curing, and the coated film was dried in an oven at 60° C. for 2 minutes. Next, the dried film was irradiated with a medium pressure mercury lamp (UV source, light intensity: 1 J/cm ² ) to be hardened to form an anchor layer.

The following evaluations were performed with respect to the polarizing films with the adhesive layers obtained in the above examples and comparative examples. The evaluation results are shown in Table 1.

<Surface resistance value (Ω/□): Electrical conductivity>

The surface resistance values were measured for the anchor layer and the adhesive layer.

The surface resistance value of the anchor layer was measured on the side surface of the anchor layer of the polarizing film with the anchor layer before the adhesive layer was formed.

The surface resistance value of the adhesive layer was measured on the surface of the adhesive layer formed on the separation film.

Moreover, after peeling off the separation film from the polarizing film with the obtained adhesive layer, the surface resistance value of the surface of the adhesive layer was measured. The measurement was performed using MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd. The measurement results are recorded at the top of the column in Table 1 in which other evaluation items are described.

<ESD (Electro-Static Discharge) test>

After peeling off the separation film from the polarizing film with the adhesive layer, it is attached to the viewing side of the built-in liquid crystal cell as shown in FIG. 2 . Next, a silver paste with a width of 5 mm was applied to the side surfaces of the pasted polarizing film to cover the hard coat layer, polarizing film, anchor layer, and adhesive layer, and was connected to an external ground electrode. Furthermore, the wiring (not shown) in the peripheral portion of the transparent electrode pattern inside the built-in liquid crystal cell is connected to a controller IC (not shown) to produce A liquid crystal display device with embedded touch sensing function is produced. The polarizing film of the liquid crystal display device was surface-emitted with an electrostatic discharge gun (Electrostatic discharge Gun) at an applied voltage of 10 kV, and the time until the part where the white spots appeared due to electricity disappeared was measured and judged based on the following criteria. However, in Example 1, the conductive structure was not formed with silver paste.

(assessment benchmark)

◎: Within 3 seconds.

○: More than 3 seconds to within 5 seconds.

△: More than 5 seconds to within 20 seconds.

×: More than 20 seconds.

<TSP (Touch Screen Panel) sensitivity>

In the state of using the input display device of the liquid crystal display device with built-in touch-sensing function produced in the ESD test, it is visually observed to confirm whether there is any failure.

○: No trouble.

×: There is a failure.

<TSP sensitivity under humidification>

After placing the liquid crystal display device with embedded touch sensing function fabricated in the ESD test in a humidified gas environment of 60°C/90% RH for 120 hours, the TSP sensitivity was confirmed in the humidified gas environment.

<Humidification Durability Test>

The polarizing film with the adhesive layer was cut into a 15-inch size to prepare a sample. The sample was adhered to an alkali-free glass (EG-XG manufactured by Corning Incorporated) having a thickness of 0.7 mm using a laminator.

Next, the autoclave treatment was performed under the conditions of 50° C. and 0.5 MPa for 15 minutes, so that the above-mentioned sample was completely adhered to the alkali-free glass. After the above-treated samples were treated for 500 hours in a gas atmosphere of 60°C/90% RH, the appearance between the polarizing film and the alkali-free glass was visually evaluated according to the following criteria.

(assessment benchmark)

⊚: There is no change in appearance such as foaming and peeling.

○: There is some peeling or foaming on the edge, but there is no practical problem.

△: There is peeling or foaming at the edge, but there is no practical problem as long as it is not used for special purposes.

×: Remarkable peeling occurs at the edge, and there is a practical problem.

[Table 1]

In Table 1, Li-TFSI represents lithium bis(trifluoromethanesulfonyl)imide.

1‧‧‧First polarizing film

2‧‧‧First adhesive layer

3‧‧‧Anchor Layer

4‧‧‧Surface treatment layer

11‧‧‧Second polarizing film

12‧‧‧Second adhesive layer

20‧‧‧Liquid crystal layer

31‧‧‧Touch Sensor Section

32‧‧‧Drive electrode and sensor part

41‧‧‧First transparent substrate

42‧‧‧Second transparent substrate

50, 51‧‧‧Conduction structure

A‧‧‧Polarizing film with adhesive layer

B‧‧‧Built-in LCD cell

C‧‧‧Built-in LCD panel

Claims (5)

A built-in liquid crystal panel is characterized by having: a built-in liquid crystal cell, which has a liquid crystal layer, a first transparent substrate and a second transparent substrate, a touch sensor part and a driving electrode and a sensor part, the liquid crystal layer contains In the absence of an electric field, the liquid crystal molecules are aligned in parallel, the first transparent substrate and the second transparent substrate sandwich the liquid crystal layer from both sides, and the touch sensor portion is provided between the liquid crystal layer and the first transparent substrate. During the time, the driving electrode and sensor part are arranged between the liquid crystal layer and the second transparent substrate; and the polarizing film attached to the adhesive layer is disposed on the built-in liquid crystal through the first adhesive layer instead of the conductive layer. The first transparent substrate side on the viewing side of the unit; wherein, the polarizing film with the adhesive layer has a first polarizing film, an anchor layer, and a first adhesive layer in sequence; the anchor layer has a conductive polymer, and the above The first adhesive layer contains an antistatic agent; the anchor layer and the side surfaces of the first adhesive layer of the polarizing film with the adhesive layer have a conductive structure. The built-in liquid crystal panel of claim 1, wherein the thickness of the anchor layer is 0.01~0.5μm, the surface resistance value is 1×10 ⁸ ~1×10 ¹² Ω/□; the thickness of the first adhesive layer is 5 ~100μm, the surface resistance is 1×10 ⁸ ~1×10 ¹² Ω/□; and the surface resistance of the polarizing film with the adhesive layer on the adhesive layer side is 1×10 ⁸ ~1×10 ¹¹ Ω/ □. The built-in liquid crystal panel of claim 1, wherein the antistatic agent is an alkali metal salt and/or an organic cation-anion salt. The built-in liquid crystal panel according to any one of claims 1 to 3, further comprising a second polarizing film disposed through the second adhesive layer on the second transparent substrate side of the built-in liquid crystal cell. A liquid crystal display device has the built-in liquid crystal panel as claimed in item 4.

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