In-cell liquid crystal panel and liquid crystal display device

Abstract

The present invention provides an embedded liquid crystal panel with good antistatic function and which can meet the sensitivity of a touch sensor and durability in a humidified environment. The panel has an embedded liquid crystal unit and a polarizing film with an adhesive layer. The embedded liquid crystal unit has: a liquid crystal layer including liquid crystal molecules uniformly oriented in a state where no electric field exists, a first transparent substrate and a second transparent substrate that clamp the liquid crystal layer with two surfaces, and a touch sensing electrode portion between the first transparent substrate and the second transparent substrate that is related to the touch sensor and touch driving functions. The polarizing film with an adhesive layer is arranged on the first transparent substrate side of the visible side of the embedded liquid crystal unit through the first adhesive layer, and no conductive layer is sandwiched between them. The polarizing film with an adhesive layer has a first polarizing film, a thickening layer, and a first adhesive layer in sequence. The thickening layer contains a conductive polymer, and the first adhesive layer contains an antistatic agent.

Description

[0001] This application is a divisional application of an application with a filing date of March 28, 2018, application number 201880021944.3, and invention name “Embedded liquid crystal panel and liquid crystal display device”. Technical Field

[0002] The present invention relates to an in-cell liquid crystal cell having a touch sensing function introduced inside the liquid crystal cell and an in-cell liquid crystal panel having a polarizing film with an adhesive layer on the visible side of the in-cell liquid crystal cell. The present invention also relates to a liquid crystal display device using the liquid crystal panel. The liquid crystal display device with a touch sensing function using the in-cell liquid crystal panel of the present invention can be used as various input display devices such as mobile devices. Background Art

[0003] Liquid crystal display devices are usually laminated with polarizing films from both sides of the liquid crystal unit through adhesive layers according to their image formation method. In addition, products that mount touch panels on the display screen of liquid crystal display devices have also been put into practical use. As touch panels, there are various methods such as capacitive, resistive film, optical, ultrasonic or electromagnetic induction, but capacitive is beginning to be widely used. In recent years, liquid crystal display devices with touch sensing functions that have built-in capacitive sensors as touch sensor parts have been used.

[0004] On the other hand, when manufacturing a liquid crystal display device, when the above-mentioned 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, but static electricity is generated due to the peeling of the release film. In addition, static electricity is also generated when the surface protective film of the polarizing film attached to the liquid crystal cell is peeled off and when the surface protective film of the cover glass (cover window) is peeled off. The static electricity generated in this way affects the orientation of the liquid crystal layer inside the liquid crystal display device, resulting in defects. The generation of static electricity can be suppressed by, for example, forming an antistatic layer on the outer surface of the polarizing film.

[0005] On the other hand, the capacitive sensor in a liquid crystal display device with a touch sensing function detects the weak capacitance formed between the transparent electrode pattern and the finger when the user's finger approaches the surface. When there is a conductive layer such as an antistatic layer between the transparent electrode pattern and the user's finger, the electric field between the drive electrode and the sensor electrode is disturbed, the sensor electrode capacitance becomes unstable, and the sensitivity of the touch panel is reduced, which becomes a cause of malfunction. In a liquid crystal display device with a touch sensing function, it is required to suppress the malfunction of the capacitive sensor while suppressing the generation of static electricity. For example, in order to reduce the occurrence of poor display and malfunction in a liquid crystal display device with a touch sensing function, it is proposed to configure a liquid crystal layer with a surface resistance of 1.0×10 9 ~1.0×10 11A polarizing film having an antistatic layer of Ω / □ (Patent Document 1).

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2013-105154 Summary of the invention

[0009] Problems to be solved by the invention

[0010] According to the polarizing film with an antistatic layer described in Patent Document 1, it is possible to suppress the generation of static electricity to a certain extent. However, in Patent Document 1, since the configuration position of the antistatic layer deviates from the original position where static electricity is generated, it is not effective compared to the case where the antistatic function is given to the adhesive layer. In addition, it is known that for a liquid crystal display device with a touch sensing function using an embedded liquid crystal unit, conductivity can be given from the side by providing a conductive structure on the side of the polarizing film, but in the case of a thin antistatic layer, since the contact area between the side and the conductive structure is small, sufficient conductivity cannot be obtained, resulting in poor conductivity. On the other hand, it is known that when the antistatic layer is thickened, the sensitivity of the touch sensor decreases.

[0011] On the other hand, the adhesive layer endowed with antistatic function is effective in suppressing the generation of static electricity and preventing static unevenness compared to the antistatic layer provided on the above-mentioned polarizing film. However, it is known that when the antistatic function of the adhesive layer is emphasized and the conductive function of the adhesive layer is improved, the sensitivity of the touch sensor is reduced. In particular, it is known that for a liquid crystal display device with a touch sensing function using an embedded liquid crystal unit, the sensitivity of the touch sensor is reduced. It is also known that the antistatic agent added to the adhesive layer in order to improve the conductive function is segregated at the interface with the polarizing film or transferred to the visible side interface of the liquid crystal unit under a humidified environment (after a humidification reliability test), and the durability is insufficient.

[0012] The object of the present invention is to provide an embedded liquid crystal panel, which has an embedded liquid crystal unit and a polarizing film with an adhesive layer applied to its visible side. The above-mentioned embedded liquid crystal panel has good antistatic function and can meet the sensitivity of the touch sensor and durability in a humidified environment.

[0013] Another object of the present invention is to provide a liquid crystal display device using the above-mentioned in-cell liquid crystal panel.

[0014] Solution to the problem

[0015] The present inventors have conducted intensive studies to solve the above-mentioned problems and, as a result, have found that the above-mentioned problems can be solved by the following in-cell liquid crystal panel, thereby completing the present invention.

[0016] That is, the present invention relates to an in-cell liquid crystal panel having an in-cell liquid crystal cell and a polarizing film with an adhesive layer.

[0017] The embedded liquid crystal unit comprises: a liquid crystal layer including liquid crystal molecules uniformly oriented in the absence of an electric field, a first transparent substrate and a second transparent substrate sandwiching the liquid crystal layer with two surfaces, and a touch sensing electrode portion related to touch sensor and touch driving functions between the first transparent substrate and the second transparent substrate.

[0018] The polarizing film with an adhesive layer is arranged on the first transparent substrate side of the visible side of the embedded liquid crystal cell through the first adhesive layer, and no conductive layer is interposed therebetween.

[0019] The polarizing film with an adhesive layer comprises a first polarizing film, an adhesion-promoting layer, and a first adhesive layer in this order.

[0020] The anchor layer contains a conductive polymer, and the first adhesive layer contains an antistatic agent.

[0021] In the in-cell liquid crystal panel, the pressure-sensitive adhesive layer-attached polarizing film may include a conduction structure on the side surfaces of the anchor layer and the first pressure-sensitive adhesive layer.

[0022] In the above-mentioned in-cell liquid crystal panel, it is preferred that the thickness of the above-mentioned adhesion promoting layer is 0.01 to 0.5 μm, and the surface resistance value is 1×10 8 ~1×10 12 Ω / □,

[0023] The thickness of the first adhesive layer is 5 to 100 μm, and the surface resistance is 1×10 8 ~1×10 12 Ω / □, and

[0024] The surface resistance of the pressure-sensitive adhesive layer side of the pressure-sensitive adhesive layer-attached polarizing film is 1×10 8 ~1×10 11 Ω / □.

[0025] In the above-mentioned in-cell liquid crystal panel, the above-mentioned antistatic agent may contain an alkali metal salt and / or an organic cation-anion salt.

[0026] In the embedded liquid crystal panel, the touch sensing electrode portion may be a touch sensing electrode portion disposed between the liquid crystal layer and the first transparent substrate or between the liquid crystal layer and the second transparent substrate. The touch sensing electrode portion may be a touch sensing electrode portion disposed between the liquid crystal layer and the first transparent substrate, or may be a touch sensing electrode portion disposed between the liquid crystal layer and the second transparent substrate.

[0027] In the in-cell liquid crystal panel, the touch sensing electrode portion may be a touch sensing electrode portion formed of a touch sensor electrode and a touch driving electrode.

[0028] In the above-mentioned in-cell liquid crystal panel, when the above-mentioned touch sensing electrode portion is arranged between the above-mentioned liquid crystal layer and the above-mentioned first transparent substrate or the above-mentioned liquid crystal layer and the above-mentioned second transparent substrate, the above-mentioned touch sensing electrode portion may use an electrode formed by integrating a touch sensor electrode and a touch driving electrode.

[0029] The in-cell liquid crystal panel may include a second polarizing film disposed via a second adhesive layer on the second transparent substrate side of the in-cell liquid crystal cell.

[0030] Furthermore, the present invention relates to a liquid crystal display device having the above-mentioned in-cell liquid crystal panel.

[0031] Effects of the Invention

[0032] For the polarizing film with adhesive layer on the visible side of the embedded liquid crystal panel of the present invention, the tackifying layer contains a conductive polymer, and the adhesive layer contains an antistatic agent, and is endowed with an antistatic function. Therefore, in the embedded liquid crystal panel, when a conductive structure is provided on each side of the tackifying layer and the adhesive layer, the polarizing film can contact with the conductive structure and the contact area can be sufficiently ensured. Therefore, the conduction of the sides of each layer of the tackifying layer and the adhesive layer can be ensured, and the static unevenness caused by poor conduction can be suppressed.

[0033] In addition, the polarizing film with an adhesive layer of the present invention can control the surface resistance value of each layer of the adhesion layer and the adhesive layer to a given range, and the surface resistance value of the adhesive layer side of the polarizing film with an adhesive layer can also be controlled to a given range. Thus, the polarizing film with an adhesive layer of the present invention can be controlled so that the sensitivity of the touch sensor is not reduced and the durability in a humidified environment is not deteriorated, and the surface resistance values ​​of the adhesion layer and the adhesive layer are reduced to impart a given antistatic function. Therefore, the polarizing film with an adhesive layer of the present invention has a good antistatic function and can meet the sensitivity of the touch sensor and the durability in a humidified environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a cross-sectional view showing an example of a polarizing film with a pressure-sensitive adhesive layer used on the viewing side of the in-cell type liquid crystal panel of the present invention.

[0035] Figure 2 This is a cross-sectional view showing an example of the in-cell type liquid crystal panel of the present invention.

[0036] Figure 3 This is a cross-sectional view showing an example of the in-cell type liquid crystal panel of the present invention.

[0037] Figure 4 This is a cross-sectional view showing an example of the in-cell type liquid crystal panel of the present invention.

[0038] Figure 5 This is a cross-sectional view showing an example of the in-cell type liquid crystal panel of the present invention.

[0039] Figure 6 This is a cross-sectional view showing an example of the in-cell type liquid crystal panel of the present invention.

[0040] Explanation of symbols

[0041] A Polarizing film with adhesive layer

[0042] B In-cell liquid crystal unit

[0043] C In-cell LCD panel

[0044] 1, 11 1st and 2nd polarizing films

[0045] 2, 12 1st and 2nd adhesive layers

[0046] 3 Adhesion layer

[0047] 4 Surface treatment layer

[0048] 20 Liquid crystal layer

[0049] 31 Touch sensor electrodes

[0050] 32 touch drive electrodes

[0051] 33 Touch drive electrode and sensor electrode

[0052] 41, 42 1st, 2nd transparent substrate DETAILED DESCRIPTION

[0053] Hereinafter, the present invention will be described with reference to the accompanying drawings. Figure 1 As shown, the polarizing film A with adhesive layer used on the visible side of the in-cell liquid crystal panel of the present invention sequentially comprises a first polarizing film 1, an adhesion layer 3, and a first adhesive layer 2. In addition, a surface treatment layer 4 may be provided on the side of the first polarizing film 1 where the adhesion layer 3 is not provided. Figure 1 The example in FIG. 4 shows a case where the pressure-sensitive adhesive layer-attached polarizing film A has a surface-treated layer 4. The pressure-sensitive adhesive layer-attached polarizing film A of the present invention is disposed on, for example, Figure 2 to Figure 6 The transparent substrate 41 side of the visible side of the embedded liquid crystal unit B shown in FIG. Figure 1Although not described in the specification, the first pressure-sensitive adhesive layer 2 of the pressure-sensitive adhesive layer-attached polarizing film A of the present invention may be provided with a separator, and the surface-treated layer 4 (the first polarizing film 1 when the surface-treated layer 4 is not provided) may be provided with a surface protective film.

[0054] From the viewpoint of the stability of the surface resistance value and the adhesion with the adhesive layer, the thickness of the above-mentioned adhesion promoting layer 3 is preferably 0.01 to 0.5 μm, preferably 0.01 to 0.2 μm, and more preferably 0.01 to 0.1 μm. In addition, from the viewpoint of the antistatic function and the sensitivity of the touch sensor, the surface resistance value of the above-mentioned adhesion promoting layer 3 is preferably 1×10 8 ~1×10 12 Ω / □, preferably 1×10 8 ~1×10 11 Ω / □, more preferably 1×10 8 ~1×10 10 Ω / □.

[0055] From the viewpoint of ensuring durability and ensuring the contact area with the conductive structure on the side, the thickness of the first adhesive layer 2 is preferably 5 to 100 μm, preferably 5 to 50 μm, and more preferably 10 to 35 μm. In addition, from the viewpoint of antistatic function and touch sensor sensitivity, the surface resistance value of the first adhesive layer 2 is preferably 1×10 8 ~1×10 12 Ω / □, preferably 1×10 8 ~1×10 11 Ω / □, more preferably 1×10 8 ~1×10 10 Ω / □.

[0056] In addition, the surface resistance value of the pressure-sensitive adhesive layer 2 side of the pressure-sensitive adhesive layer-attached polarizing film A is preferably controlled to be 1×10 8 ~1×10 11 Ω / □, thereby satisfying the antistatic function, reducing the sensitivity of the touch sensor, and reducing the durability in a humidified environment. The surface resistance value can be adjusted by controlling the surface resistance values ​​of the adhesion layer 3 and the first adhesive layer 2 respectively. The surface resistance value is preferably 1×10 8 ~6×10 10 Ω / □, more preferably 1×10 8 ~4×10 10 Ω / □.

[0057] The pressure-sensitive adhesive layer-attached polarizing film A is described below. As described above, the pressure-sensitive adhesive layer-attached polarizing film A of the present invention includes the first polarizing film 1, the anchor layer 3, and the first pressure-sensitive adhesive layer 2 in this order. Furthermore, the surface treatment layer 4 may be included.

[0058] <First polarizing film>

[0059] The first polarizing film can usually use a polarizing film with a transparent protective film on one or both sides of the polarizer. The polarizer is not particularly limited, and various polarizers can be used. As the polarizer, for example: a polarizer obtained by adsorbing dichroic substances such as iodine and dichroic dyes on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and partially saponified films of ethylene-vinyl acetate copolymers, and uniaxially stretching them; polyene oriented films such as dehydrated products of polyvinyl alcohol and dehydrochlorinated products of polyvinyl chloride, etc. Among them, preferred are polarizers containing dichroic substances such as polyvinyl alcohol films and iodine. There is no particular limitation on the thickness of these polarizers, which is generally about 80μm or less.

[0060] In addition, as a polarizer, a thin polarizer with a thickness of 10 μm or less can be used. From the perspective of thinning, the thickness is preferably 1 to 7 μm. Such a thin polarizer has less uneven thickness, excellent visibility, and less dimensional change, so it has excellent durability, and the thickness of the polarizing film can also be thinned, which is preferred in this respect.

[0061] As the material constituting the transparent protective film, for example, a thermoplastic resin having excellent transparency, mechanical strength, thermal stability, moisture barrier, isotropy, etc. can be used. Specific examples of such thermoplastic resins include, for example, cellulose resins such as triacetyl cellulose, polyester resins, polyethersulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins, cyclic polyolefin resins (norbornene resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof. It should be noted that a transparent protective film can be attached to one side of the polarizer through an adhesive layer, and a thermosetting resin or ultraviolet curing resin such as (meth) acrylic acid, urethane, acrylic urethane, epoxy, silicone, etc. can be used as a transparent protective film on the other side. The transparent protective film can contain one or more of any appropriate additives.

[0062] The adhesive used in laminating the polarizer and the transparent protective film is not particularly limited as long as it is optically transparent. Various forms of adhesives such as aqueous, solvent-based, hot melt, free radical curing, and cation curing can be used, preferably aqueous adhesives or free radical curing adhesives.

[0063] <Antistatic Agent>

[0064] Examples of the antistatic agent include materials capable of imparting antistatic properties, such as ionic surfactants, conductive polymers, and conductive fine particles. In addition, an ionic compound can be used as the antistatic agent.

[0065] Examples of the ionic surfactant include cationic surfactants (e.g., quaternary ammonium salts, onium salt type, sulfonium salt type, etc.), anionic type (carboxylic acid type, sulfonate type, sulfate type, phosphate type, phosphite type, etc.), zwitterionic type (sulfobetaine type, alkyl betaine type, alkyl imidazole type Various surfactants of the present invention can be used, for example, betaine type (such as polyol derivatives, β-cyclodextrin inclusion compound, sorbitan fatty acid monoester / diester, polyoxyalkylene derivatives, amine oxide, etc.) or non-ionic type (polyol derivatives, β-cyclodextrin inclusion compound, sorbitan fatty acid monoester / diester, polyoxyalkylene derivatives, amine oxide, etc.).

[0066] Examples of the conductive polymer include polyaniline, polythiophene, polypyrrole, polyquinoxaline and the like. Among them, polyaniline and polythiophene, which are easily formed into a water-soluble conductive polymer or a water-dispersible conductive polymer, are preferably used, and polythiophene is particularly preferred.

[0067] In addition, as conductive particles, metal oxides such as tin oxide, antimony oxide, indium oxide, and zinc oxide can be listed. Among them, tin oxide is preferred. As conductive particles of tin oxide, for example, in addition to tin oxide, antimony-doped tin oxide, indium-doped tin oxide, aluminum-doped tin oxide, tungsten-doped tin oxide, titanium oxide-cerium oxide-tin oxide composite, titanium oxide-tin oxide composite, etc. can be listed. The average particle size of the particles is about 1 to 100 nm, preferably 2 to 50 nm.

[0068] In addition, examples of antistatic agents other than the above include: acetylene black, Ketjen black, natural graphite, artificial graphite, titanium black, and homopolymers of monomers having ion conductive groups of cationic (quaternary ammonium salts, etc.), zwitterionic (betaine compounds, etc.), anionic (sulfonates, etc.) or nonionic (glycerol, etc.) types, or copolymers of such monomers and other monomers, polymers having a portion derived from acrylate or methacrylate having a quaternary ammonium salt group, and other ion conductive polymers; and permanent antistatic agents of the type obtained by alloying hydrophilic polymers such as polyethylene methacrylate copolymers with acrylic resins, etc.

[0069] 《Ionic Compounds》

[0070] In addition, as ionic compounds, alkali metal salts and / or organic cation-anion salts can be preferably used. Alkali metal salts can use organic salts and inorganic salts of alkali metals. It should be noted that the "organic cation-anion salt" mentioned in the present invention refers to an organic salt whose cation part is composed of an organic substance, and the anion part can be an organic substance or an inorganic substance. "Organic cation-anion salt" is also called an ionic liquid or an ionic solid.

[0071] <Alkali metal salts>

[0072] Examples of the alkali metal ions constituting the cation portion of the alkali metal salt include ions of lithium, sodium, potassium, etc. Among these alkali metal ions, lithium ions are preferred.

[0073] The anion part of the alkali metal salt may be composed of an organic substance or an inorganic substance. Examples of the anion part constituting the organic salt include: CH3COO - CF3COO - 、CH3SO3 - CF3SO3 - 、(CF3SO2)3C - 、C4F9SO3 - 、C3F7COO - 、(CF3SO2)(CF3CO)N - 、(FSO2)2N - , - O3S(CF2)3SO3 - PF6 - 、CO3 2- , anions represented by the following general formulas (1) to (4), etc.

[0074] (1): (C n F 2n+1 SO2)2N - (where n is an integer from 1 to 10),

[0075] (2): CF2(C m F 2m SO2)2N - (wherein m is an integer from 1 to 10),

[0076] (3): - O3S(CF2) l SO3 - (wherein l is an integer from 1 to 10),

[0077] (4): (C p F 2p+1 SO2)N - (C q F 2q+1 SO2) (wherein p and q are integers of 1 to 10). In particular, the anion part containing fluorine atoms can obtain an ionic compound with good ionization property, so it is preferably used. As the anion part constituting the inorganic salt, Cl - Br - ,I - 、AlCl4 - 、Al2Cl7 - 、BF4 - PF6 -、ClO4 - 、NO3 - 、AsF6 - 、SbF6 - 、NbF6 - 、TaF6 - 、(CN)2N - As the anion part, (CF3SO2)2N is preferred. - 、(C2F5SO2)2N - The (perfluoroalkylsulfonyl)imide represented by the above general formula (1) is particularly preferably (CF3SO2)2N - Represents trifluoromethanesulfonimide.

[0078] Specific examples of organic salts of alkali metals include sodium acetate, sodium alginate, sodium lignin sulfonate, sodium toluene sulfonate, LiCF3SO3, Li(CF3SO2)2N, Li(CF3SO2)2N, Li(C2F5SO2)2N, Li(C4F9SO2)2N, Li(CF3SO2)3C, KO3S(CF2)3SO3K, LiO3S(CF2)3SO3K, etc. Among them, preferred are LiCF3SO3, Li(CF3SO2)2N, Li(C2F5SO2)2N, Li(C4F9SO2)2N, Li(CF3SO2)3C, more preferred are fluorinated imide lithium salts such as Li(CF3SO2)2N, Li(C2F5SO2)2N, Li(C4F9SO2)2N, and particularly preferred are (perfluoroalkylsulfonyl)imide lithium salts.

[0079] In addition, examples of inorganic salts of alkali metals include lithium perchlorate and lithium iodide.

[0080] <Organic cation-anion salt>

[0081] The organic cation-anion salt used in the present invention is composed of a cation component and an anion component, wherein the cation component is composed of an organic substance. Specific examples of the cation component include: pyridine Cation, piperidine Cation, pyrrolidine Cation, cation having a pyrroline skeleton, cation having a pyrrole skeleton, imidazole Cation, Tetrahydropyrimidine Cations, dihydropyrimidines Cation, pyrazole Cationic, pyrazoline Cations, tetraalkylammonium cations, trialkylsulfonium cations, tetraalkyl Cations, etc.

[0082] Examples of the anion component include Cl- Br - ,I - 、AlCl4 - 、Al2Cl7 - 、BF4 - PF6 - 、ClO4 - 、NO3 - 、CH3COO - CF3COO - 、CH3SO3 - CF3SO3 - 、(CF3SO2)3C - 、AsF6 - 、SbF6 - 、NbF6 - 、TaF6 - 、(CN)2N - 、C4F9SO3 - 、C3F7COO - 、(CF3SO2)(CF3CO)N - 、(FSO2)2N - , - O3S(CF2)3SO3 - , anions represented by the following general formulas (1) to (4), etc.

[0083] (1): (C n F 2n+1 SO2)2N - (where n is an integer from 1 to 10),

[0084] (2): CF2(C m F 2m SO2)2N - (wherein m is an integer from 1 to 10),

[0085] (3): - O3S(CF2) l SO3 - (wherein l is an integer from 1 to 10),

[0086] (4): (C p F 2p+1 SO2)N - (C q F 2q+1 SO2), (wherein p and q are integers of 1 to 10). Among them, an anion component containing a fluorine atom is particularly preferably used because it can obtain an ionic compound with good ionization property.

[0087] In addition, as the ionic compound, in addition to the above-mentioned alkali metal salts and organic cation-anion salts, inorganic salts such as ammonium chloride, aluminum chloride, cupric chloride, ferrous chloride, ferric chloride, and ammonium sulfate can be mentioned. These ionic compounds can be used alone or in combination of two or more.

[0088] <Adhesion-promoting layer>

[0089] As mentioned above, the thickness of the adhesion-promoting layer is preferably 0.01 to 0.5 μm, and the surface resistance is 1×10 8 ~1×10 12 Ω / □. The adhesion layer can be formed from various antistatic agent compositions. As the antistatic agent forming the adhesion layer, a conductive polymer can be used.

[0090] Among these antistatic agents, it is preferred to use conductive polymers from the viewpoint of optical properties, appearance, antistatic effect, and stability of the antistatic effect when heated and humidified. It is particularly preferred to use conductive polymers such as polyaniline and polythiophene. Conductive polymers can appropriately use organic solvent-soluble, water-soluble, and water-dispersible polymers, preferably water-soluble conductive polymers or water-dispersible conductive polymers. Water-soluble conductive polymers and water-dispersible conductive polymers can prepare the coating liquid when the antistatic layer is to be formed into an aqueous solution or an aqueous dispersion, and the coating liquid does not need to use a non-aqueous organic solvent, because it can suppress the deterioration of the optical film substrate caused by the organic solvent. It should be noted that the aqueous solution or the aqueous dispersion can also contain an aqueous solvent in addition to water. Examples of the alcohols include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, n-pentanol, isopentanol, sec-pentanol, tert-pentanol, 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol, and cyclohexanol.

[0091] In addition, the water-soluble conductive polymers or water-dispersible conductive polymers such as polyaniline and polythiophene preferably have hydrophilic functional groups in the molecule. Examples of the hydrophilic functional groups include sulfonic acid groups, amino groups, amide groups, imino groups, quaternary ammonium salt groups, hydroxyl groups, sulfhydryl groups, hydrazine groups, carboxyl groups, sulfate groups, phosphate groups, or salts thereof. By having hydrophilic functional groups in the molecule, the water-soluble conductive polymers or water-dispersible conductive polymers can be easily prepared so that the polymers are easily dissolved in water and easily dispersed in water in a microparticle form.

[0092] Examples of commercially available water-soluble conductive polymers include polyaniline sulfonic acid (manufactured by Mitsubishi Rayon Co., Ltd., weight average molecular weight 150,000 in terms of polystyrene) etc. Examples of commercially available water-dispersible conductive polymers include polythiophene conductive polymers (manufactured by Nagase ChemteX, trade name, Denatron series) etc.

[0093] In addition, as a material for forming the adhesion layer, in order to improve the film forming property of the conductive polymer and the adhesion to the optical film, etc., a binder component may be added together with the conductive polymer. In the case where the conductive polymer is a water-soluble conductive polymer or a water-dispersible conductive polymer, a water-soluble or water-dispersible binder component is used. Examples of the binder include: Oxazoline polymers, polyurethane resins, polyester resins, acrylic resins, polyether resins, cellulose resins, polyvinyl alcohol resins, epoxy resins, polyvinyl pyrrolidone, polystyrene resins, polyethylene glycol, pentaerythritol, etc. Polyurethane resins, polyester resins, and acrylic resins are particularly preferred. These adhesives can be used one or more of them according to their use.

[0094] The amount of the conductive polymer and the binder used varies depending on their types. It is preferred that the surface resistance of the obtained adhesion layer be controlled to 1×10 8 ~1×10 12 Ω / □.

[0095] <First adhesive layer>

[0096] 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 ~1×10 12 Ω / □. The first adhesive layer can be formed of a composition in which an antistatic agent is blended into various adhesives.

[0097] As the adhesive forming the first adhesive layer, various adhesives can be used, for example: rubber adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, vinyl alkyl ether adhesives, polyvinyl pyrrolidone adhesives, polyacrylamide adhesives, cellulose adhesives, etc. can be listed. The adhesive base polymer can be selected according to the type of the above-mentioned adhesive. Among the above-mentioned adhesives, acrylic adhesives can be preferably used from the viewpoints of excellent optical transparency, showing suitable adhesive properties of wettability, cohesion and adhesion, and excellent weather resistance, heat resistance, etc.

[0098] The acrylic adhesive comprises a (meth) acrylic polymer as a base polymer. The (meth) acrylic polymer generally contains an alkyl (meth) acrylate as a monomer unit as a main component. It should be noted that (meth) acrylate refers to acrylate and / or methacrylate, and the (meth) of the present invention also has the same meaning.

[0099] As the (meth)acrylic acid alkyl ester constituting the main skeleton of the (meth)acrylic polymer, there can be exemplified a linear or branched (meth)acrylic acid alkyl ester having an alkyl carbon number of 1 to 18. These (meth)acrylic acid alkyl esters can be used alone or in combination. The average carbon number of these alkyl groups is preferably 3 to 9.

[0100] In addition, from the viewpoints of adhesive properties, durability, adjustment of phase difference, adjustment of refractive index, and the like, aromatic ring-containing alkyl (meth)acrylates such as phenoxyethyl (meth)acrylate and benzyl (meth)acrylate may be used.

[0101] In order to improve the adhesiveness and heat resistance, one or more comonomers containing a polymerizable functional group having an unsaturated double bond such as a (meth)acryloyl group or a vinyl group may be introduced into the (meth)acrylic polymer by copolymerization. Specific examples of such comonomers include: hydroxyl group-containing monomers such as 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)acrylate, and 4-hydroxymethylcyclohexyl methacrylate; carboxyl group-containing monomers such as (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid; acid anhydride group-containing monomers such as maleic anhydride and itaconic anhydride; caprolactone adducts of acrylic acid; sulfonic acid group-containing monomers such as styrenesulfonic acid, allylsulfonic acid, 2-(meth)acrylamide-2-methylpropanesulfonic acid, (meth)acrylamidepropanesulfonic acid, sulfopropyl (meth)acrylate, and (meth)acryloyloxynaphthalenesulfonic acid; phosphoric acid group-containing monomers such as 2-hydroxyethylacryloyl phosphate, and the like.

[0102] In addition, examples of monomers for the purpose of modification include (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N-butyl(meth)acrylamide, N-methylol(meth)acrylamide, N-methylolpropane(meth)acrylamide and other (N-substituted)amide monomers; (meth)acrylic acid alkylaminoalkyl ester monomers such as (meth)aminoethyl acrylate, N,N-dimethylaminoethyl(meth)acrylate, and tert-butylaminoethyl(meth)acrylate; (meth)acrylic acid alkoxyalkyl ester monomers such as (meth)methoxyethyl(meth)acrylate and ethoxyethyl(meth)acrylate; N-(meth)acrylamide, N-methylol(meth)acrylamide, N-methylolpropane(meth)acrylamide and other (N-substituted)amide monomers; (meth)acrylic acid alkylaminoalkyl ester monomers such as (meth)aminoethyl acrylate, N,N-dimethylaminoethyl(meth)acrylate, and tert-butylaminoethyl(meth)acrylate; (meth)acrylic acid alkoxyalkyl ester monomers such as (meth)methoxyethyl acrylate and ethoxyethyl(meth)acrylate; Succinimide monomers such as oxymethylene succinimide, N-(meth)acryloyl-6-oxyhexamethylene succinimide, N-(meth)acryloyl-8-oxyoctamethylene succinimide, and N-acryloyl morpholine; maleimide monomers such as N-cyclohexylmaleimide, N-isopropylmaleimide, N-laurylmaleimide, and N-phenylmaleimide; itaconimide monomers such as N-methylitaconimide, N-ethylitaconimide, N-butylitaconimide, N-octylitaconimide, N-2-ethylhexylitaconimide, N-cyclohexylitaconimide, and N-laurylitaconimide.

[0103] In addition, as the modifying monomer, vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyrrolidone, vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinyl pyrazine, vinyl pyrrole, vinyl imidazole, vinyl Vinyl monomers such as oxazole, vinyl morpholine, N-vinyl carboxylic acid amides, styrene, α-methylstyrene, N-vinyl caprolactam, etc.; cyanoacrylate monomers such as acrylonitrile and methacrylonitrile; epoxy-containing acrylic monomers such as glycidyl (meth)acrylate; diol acrylate monomers such as polyethylene glycol (meth)acrylate, polypropylene glycol (meth)acrylate, methoxyethylene glycol (meth)acrylate, methoxypolypropylene glycol (meth)acrylate; acrylate monomers such as tetrahydrofurfuryl (meth)acrylate, fluorine-containing (meth)acrylate, silicone (meth)acrylate, 2-methoxyethyl acrylate, etc. In addition, isoprene, butadiene, isobutylene, vinyl ether, etc. can be cited.

[0104] In addition, as copolymerizable monomers other than the above, silane monomers containing silicon atoms can be cited. As silane monomers, for example, 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, 8-vinyloctyltrimethoxysilane, 8-vinyloctyltriethoxysilane, 10-methacryloxydecyltrimethoxysilane, 10-acryloxydecyltrimethoxysilane, 10-methacryloxydecyltriethoxysilane, 10-acryloxydecyltriethoxysilane, etc. can be cited.

[0105] In addition, as the comonomer, a polyfunctional monomer having two or more unsaturated double bonds such as (meth)acrylic acid or vinyl groups, such as esters of (meth)acrylic acid and polyols such as tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, bisphenol A diglycidyl ether di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate, and polyester (meth)acrylates, epoxy (meth)acrylates, urethane (meth)acrylates, and the like in which two or more unsaturated double bonds such as (meth)acryloyl groups or vinyl groups are added to the skeleton of polyester, epoxy, urethane, and the like as the same functional groups as the monomer components can be used.

[0106] The (meth)acrylic polymer contains an alkyl (meth)acrylate as a main component. The ratio of the above comonomer in the (meth)acrylic polymer in the weight ratio of all constituent monomers is not particularly limited. The ratio of the above comonomer in the weight ratio of all constituent monomers is preferably about 0 to 20%, preferably about 0.1 to 15%, and more preferably about 0.1 to 10%.

[0107] Among these comonomers, from the viewpoint of adhesion and durability, hydroxyl-containing monomers and carboxyl-containing monomers are preferably used. Hydroxyl-containing monomers and carboxyl-containing monomers can be used in combination. When the adhesive composition contains a crosslinking agent, these comonomers become reaction points with the crosslinking agent. Since the reactivity of hydroxyl-containing monomers, carboxyl-containing monomers, etc. with intermolecular crosslinking agents is sufficient, it is preferably used to improve the cohesion and heat resistance of the obtained adhesive layer. From the viewpoint of reoperability, hydroxyl-containing monomers are preferably used. In addition, from the viewpoint of taking into account durability and reoperability, carboxyl-containing monomers are preferably used.

[0108] When a hydroxyl group-containing monomer is contained as a comonomer, its proportion is preferably 0.01 to 15% by weight, more preferably 0.03 to 10% by weight, and further preferably 0.05 to 7% by weight. When a carboxyl group-containing monomer is contained as a comonomer, its proportion is preferably 0.05 to 10% by weight, more preferably 0.1 to 8% by weight, and further preferably 0.2 to 6% by weight.

[0109] The (meth) acrylic polymer of the present invention generally uses a polymer with a weight average molecular weight in the range of 500,000 to 3,000,000. Considering durability, especially heat resistance, it is preferred to use a polymer with a weight average molecular weight of 700,000 to 2,700,000. More preferably, it is 800,000 to 2,500,000. When the weight average molecular weight is less than 500,000, it is not preferred from the viewpoint of heat resistance. In addition, when the weight average molecular weight is greater than 3,000,000, a large amount of dilution solvent is required to adjust the viscosity for coating, resulting in increased costs, and is therefore not preferred. It should be noted that the weight average molecular weight refers to a value measured by GPC (gel permeation chromatography) and calculated by conversion to polystyrene.

[0110] Such (meth)acrylic polymers can be produced by appropriately selecting known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, various radical polymerizations, etc. The obtained (meth)acrylic polymers may be any copolymers such as random copolymers, block copolymers, graft copolymers, etc.

[0111] As the antistatic agent used for forming the first adhesive layer, from the viewpoint of compatibility with the base polymer and transparency of the adhesive layer, an ionic compound is preferably used among the antistatic agents exemplified above. In particular, when using an acrylic adhesive using a (meth) acrylic polymer as a base polymer, an ionic compound is preferably used. As the ionic compound, from the viewpoint of antistatic function, an ionic liquid is preferably used.

[0112] The amount of the adhesive and antistatic agent used varies depending on their types, and the surface resistance value of the first adhesive layer can be controlled to 1×10 8 ~1×10 12 Ω / □. For example, relative to 100 parts by weight of the base polymer of the adhesive (for example, a (meth) acrylic polymer), it is preferred to use an antistatic agent in a range of 0.05 to 20 parts by weight (for example, in the case of an ionic compound). Using an antistatic agent in an amount of 0.05 parts by weight or more is preferred in terms of improving antistatic performance. In addition, the antistatic agent (B) is preferably 0.1 parts by weight or more, more preferably 0.5 parts by weight or more. In terms of satisfying durability, it is preferably used in an amount of 20 parts by weight or less, and more preferably 10 parts by weight or less.

[0113] In addition, the adhesive composition forming the first adhesive layer may contain a crosslinking agent corresponding to the base polymer. As the base polymer, for example, when a (meth) acrylic polymer is used, as the crosslinking agent, an organic crosslinking agent or a polyfunctional metal chelate may be used. As the organic crosslinking agent, isocyanate crosslinking agents, peroxide crosslinking agents, epoxy crosslinking agents, imine crosslinking agents, etc. may be cited. Polyfunctional metal chelates are chelates formed by covalent bonding or coordination bonding of polyvalent metals and organic compounds. As polyvalent metal atoms, Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti, etc. may be cited. As atoms in covalently bonded or coordinately bonded organic compounds, oxygen atoms, etc. may be cited, and as organic compounds, alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, ketone compounds, etc. may be cited.

[0114] The amount of the crosslinking agent used is preferably 3 parts by weight or less, more preferably 0.01 to 3 parts by weight, further preferably 0.02 to 2 parts by weight, and further preferably 0.03 to 1 part by weight, based on 100 parts by weight of the (meth)acrylic polymer.

[0115] In addition, the adhesive composition forming the first adhesive layer can contain silane coupling agents and other additives. For example, polyether compounds such as polyalkylene glycols such as polypropylene glycol, colorants, powders such as pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, leveling agents, softeners, antioxidants, anti-aging agents, light stabilizers, ultraviolet light absorbers, inhibitors, inorganic or organic fillers, metal powders, granular, foil-like objects, etc. can be appropriately added according to the use purpose. In addition, the redox type of adding a reducing agent can also be adopted within the controllable range. Relative to 100 weight parts of (methyl) acrylic polymers, these additives are preferably used in the range of less than 5 weight parts, more preferably less than 3 weight parts, and further preferably less than 1 weight part.

[0116] <Surface treatment layer>

[0117] The surface treatment layer may be provided on the side of the first polarizing film where the adhesion promoting layer is not provided. The surface treatment layer may be provided on the transparent protective film used for the first polarizing film, or may be provided separately from the transparent protective film. As the surface treatment layer, a hard coating layer, an anti-glare treatment layer, an anti-reflection layer, an anti-adhesion layer, etc. may be provided.

[0118] As the surface treatment layer, a hard coating is preferred. As the material for forming the hard coating, for example, a thermoplastic resin or a material cured by heat or radiation can be used. As the above-mentioned material, radiation curing resins such as thermosetting resins, ultraviolet curing resins, and electron beam curing resins can be cited. Among them, ultraviolet curing resins that can efficiently form a cured resin layer by simple processing operations in the curing treatment using ultraviolet irradiation are preferred. As these curing resins, various resins such as polyesters, acrylics, urethanes, amides, silicones, epoxies, and melamines can be cited, including their monomers, oligomers, polymers, etc. From the viewpoint of fast processing speed and less damage to the substrate caused by heat, radiation curing resins are particularly preferred, and ultraviolet curing resins are particularly preferred. The ultraviolet curing resins preferably used can include, for example, resins having ultraviolet polymerizable functional groups, including monomers and oligomer components of acrylics having 2 or more, especially 3 to 6, of the functional groups. In addition, a photopolymerization initiator can be added to the ultraviolet curing resin.

[0119] In addition, as the above-mentioned surface treatment layer, an anti-glare treatment layer and an anti-reflection layer for improving visibility can be provided. In addition, an anti-glare treatment layer and an anti-reflection layer can be provided on the above-mentioned hard coating layer. The constituent material of the anti-glare treatment layer is not particularly limited, for example, radiation curing resin, thermosetting resin, thermoplastic resin, etc. can be used. As the anti-reflection layer, titanium oxide, zirconium oxide, silicon oxide, magnesium fluoride, etc. can be used. The anti-reflection layer can be provided with multiple layers. In addition, as the surface treatment layer, an anti-adhesion layer, etc. can be cited.

[0120] The surface treatment layer may be provided with conductivity by containing an antistatic agent. As the antistatic agent, the antistatic agents exemplified above may be used.

[0121] <Surface protection film>

[0122] The surface protective film that can be provided on the above-mentioned surface treatment layer (when the above-mentioned first polarizing film does not have a surface treatment layer, the first polarizing film is taken as the object and the same treatment is performed below) can use a surface protective film having an adhesive layer on at least one side of the support film. The adhesive layer of the above-mentioned surface protective film may contain a light release agent, an antistatic agent, etc. In the case where the adhesive layer of the above-mentioned surface protective film contains an antistatic agent, the surface protective film is attached to the above-mentioned surface treatment layer and then peeled off, thereby imparting a conductive function to the surface of the surface treatment layer that does not contain an antistatic agent, and the surface treatment layer may contain an antistatic agent. The antistatic agent can use the same antistatic agent as described above. In addition, in order to impart a conductive function to the surface of the surface treatment layer by peeling off the above-mentioned surface protective film, it is preferred to use a light release agent and an antistatic agent together for the adhesive layer of the above-mentioned surface protective film. As a light release agent, for example, polyorganosiloxane can be exemplified. The degree of conductive function imparted to the surface of the above-mentioned surface treatment layer can be determined by appropriately adjusting the amount of electrostatic conductive agent and light release agent. It should be noted that the surface protective film can also be provided on the surface of the second polarizing film described later.

[0123] <Other floors>

[0124] In addition to the above-mentioned layers, the pressure-sensitive adhesive layer-attached polarizing film of the present invention may further include an easily adhesive layer on the surface of the first polarizing film on which the anchor layer is provided, or may be subjected to various easily adhesive treatments such as corona treatment and plasma treatment.

[0125] Hereinafter, the in-cell liquid crystal unit B and the in-cell liquid crystal panel C will be described.

[0126] (In-cell liquid crystal unit B)

[0127] like Figure 2 to Figure 6 As shown, the embedded liquid crystal unit B includes a liquid crystal layer 20, a first transparent substrate 41 and a second transparent substrate 42 sandwiching the liquid crystal layer 20 on both surfaces, and the liquid crystal layer 20 includes liquid crystal molecules uniformly oriented in the absence of an electric field. In addition, a touch sensing electrode portion related to the functions of the touch sensor and touch drive is provided between the first transparent substrate 41 and the second transparent substrate 42.

[0128] like Figure 2 , Figure 3 , Figure 6As shown, the touch sensing electrode portion can be formed by touch sensor electrodes 31 and touch drive electrodes 32. The touch sensor electrodes referred to here refer to touch detection (receiving) electrodes. The touch sensor electrodes 31 and touch drive electrodes 32 can be independently formed by various patterns. For example, when the embedded liquid crystal unit B is a plane, it can be configured in a pattern that crosses at right angles in the form of independent settings along the X-axis direction and the Y-axis direction. In addition, Figure 2 , Figure 3 , Figure 6 In the figure, the touch sensor electrode 31 is arranged on the side closer to the first transparent substrate 41 (visible side) than the touch drive electrode 32, but contrary to the above, the touch drive electrode 32 can also be arranged on the side closer to the first transparent substrate 41 (visible side) than the touch sensor electrode 31.

[0129] On the other hand, Figure 4 , Figure 5 As shown, the touch sensing electrode unit may use an electrode 33 in which a touch sensor electrode and a touch driving electrode are integrated.

[0130] In addition, the touch sensor electrode portion may be disposed between the liquid crystal layer 20 and the first transparent substrate 41 or between the liquid crystal layer 20 and the second transparent substrate 42 . Figure 2 , Figure 4 This is a case where the touch sensor electrode portion is disposed between the liquid crystal layer 20 and the first transparent substrate 41 (closer to the visible side than the liquid crystal layer 20 ). Figure 3 , Figure 5 This is a case where the touch sensor electrode portion is disposed between the liquid crystal layer 20 and the second transparent substrate 42 (closer to the backlight side than the liquid crystal layer 20 ).

[0131] In addition, if Figure 6 As shown, the touch sensing electrode unit may include a touch sensor electrode 31 between the liquid crystal layer 20 and the first transparent substrate 41 , and a touch driving electrode 32 between the liquid crystal layer 20 and the second transparent substrate 42 .

[0132] It should be noted that the driving electrode in the touch sensing electrode portion (the electrode 33 formed by integrating the touch driving electrode 32 , the touch sensor electrode, and the touch driving electrode) may also be used as a common electrode for controlling the liquid crystal layer 20 .

[0133] As the liquid crystal layer 20 used in the embedded liquid crystal unit B, a liquid crystal layer including liquid crystal molecules uniformly oriented in the absence of an electric field can be used. As the liquid crystal layer 20, for example, an IPS type liquid crystal layer can be preferably used. In addition, as the liquid crystal layer 20, for example, any type of liquid crystal layer such as TN type, STN type, π type, VA type, etc. can be used. The thickness of the above-mentioned liquid crystal layer 20 is, for example, about 1.5 μm to 4 μm.

[0134] As described above, the embedded liquid crystal unit B has a touch sensor electrode portion related to the touch sensor and touch drive functions in the liquid crystal unit, and does not have a touch sensor electrode outside the liquid crystal unit. That is, no conductive layer (surface resistance value of 1×10 13 Ω / □ or less). It should be noted that Figure 2 to Figure 6 The in-cell type liquid crystal panel C described in shows the order of the respective structures, but the in-cell type liquid crystal panel C may have other structures as appropriate. A color filter substrate may be provided on the liquid crystal cell (the first transparent substrate 41).

[0135] The material forming the transparent substrate may include, for example, glass or a polymer film. Examples of the polymer film include, for example, polyethylene terephthalate, polycycloolefin, polycarbonate, etc. When the transparent substrate is formed of glass, its thickness may be, for example, about 0.1 mm to 1 mm. When the transparent substrate is formed of a polymer film, its thickness may be, for example, about 10 μm to 200 μm. The transparent substrate may have an easy-adhesion layer or a hard coating layer on its surface.

[0136] The touch sensor electrode 31 (capacitive sensor), the touch drive electrode 32, or the electrode 33 formed by integrating the touch sensor electrode and the touch drive electrode, which forms the touch sensing electrode part, is formed in the form of a transparent conductive layer. As the constituent material of the above-mentioned transparent conductive layer, there is no particular limitation, and examples thereof include: metals such as gold, silver, copper, platinum, palladium, aluminum, nickel, chromium, titanium, iron, cobalt, tin, magnesium, tungsten, and alloys of these metals. In addition, as the constituent material of the above-mentioned transparent conductive layer, metal oxides of indium, tin, zinc, gallium, antimony, zirconium, and cadmium can be listed, and specifically metal oxides composed of indium oxide, tin oxide, titanium oxide, cadmium oxide, and mixtures thereof can be listed. In addition, other metal compounds composed of copper iodide and the like can be used. As needed, the above-mentioned metal oxide can also further contain oxides of metal atoms shown in the above-mentioned group. For example, indium oxide (ITO) containing tin oxide, tin oxide containing antimony, etc. can be preferably used, and ITO is particularly preferably used. As ITO, it is preferred to contain 80 to 99% by weight of indium oxide and 1 to 20% by weight of tin oxide.

[0137] The electrodes in the above-mentioned touch sensing electrode portion (touch sensor electrodes 31, touch drive electrodes 32, electrodes 33 formed by integrating the touch sensor electrodes and the touch drive electrodes) can usually be formed in the form of a transparent electrode pattern on the inner side of the first transparent substrate 41 and / or the second transparent substrate 42 (on the liquid crystal layer 20 side in the embedded liquid crystal unit B) by a common method. The above-mentioned transparent electrode pattern is usually electrically connected to a lead wire (not shown) formed at the end of the transparent substrate, and the above-mentioned lead wire is connected to a controller IC (not shown). In addition to a comb shape, the shape of the transparent electrode pattern can be any shape such as a stripe shape, a diamond shape, etc. according to the application. The height of the transparent electrode pattern is, for example, 10nm to 100nm, and the width is 0.1mm to 5mm.

[0138] (In-cell LCD panel C)

[0139] like Figures 2 to 6 As shown, the embedded liquid crystal panel C of the present invention has a polarizing film A with an adhesive layer on the visible side of the embedded liquid crystal unit B, and a second polarizing film 11 on the opposite side. The above-mentioned polarizing film A with an adhesive layer is arranged on the first transparent substrate 41 side of the above-mentioned embedded liquid crystal unit B through the above-mentioned first adhesive layer 2, and no conductive layer is sandwiched between them. On the other hand, the second polarizing film 11 is arranged on the second transparent substrate 42 side of the above-mentioned embedded liquid crystal unit B through the second adhesive layer 12. The first polarizing film 1 and the second polarizing film 11 in the above-mentioned polarizing film A with an adhesive layer are arranged on both sides of the liquid crystal layer 20 in a manner such that the transmission axes (or absorption axes) of their respective polarizers are orthogonal.

[0140] As the second polarizing film 11, the polarizing film described in the first polarizing film 1 can be used. As the second polarizing film 11, the same polarizing film as the first polarizing film 1 can be used, or a different polarizing film can be used.

[0141] The adhesive described in the first adhesive layer 2 can be used to form the second adhesive layer 12. As the adhesive used to form the second adhesive layer 12, the same adhesive as the first adhesive layer 2 can be used, or a different adhesive can be used. The thickness of the second adhesive layer 12 is not particularly limited, and is, for example, about 1 to 100 μm, preferably 2 to 50 μm, more preferably 2 to 40 μm, and further preferably 5 to 35 μm.

[0142] In addition, in the embedded liquid crystal panel C, a conductive structure 50 may be provided on the side of the above-mentioned adhesion-promoting layer 3 and the first adhesive layer 2 of the above-mentioned polarizing film A with an adhesive layer. The conductive structure 50 may be provided on the entire side of the above-mentioned adhesion-promoting layer 3 and the first adhesive layer 2, or may be provided on a portion of the side. When the above-mentioned conductive structure is provided on a portion of the side, in order to ensure the conduction of the side, the above-mentioned conductive structure is preferably provided at a ratio of 1% by area or more, more preferably 3% by area or more of the area of ​​the above-mentioned side. It should be noted that, in addition to the above, Figure 2 As shown, a conductive material 51 may be provided on the side surfaces of the first polarizing film 1 and the surface treatment layer 4 .

[0143] By using the conductive structure 50, the generation of static electricity can be suppressed by connecting the potential from the side of the above-mentioned adhesion layer 3 and the first adhesive layer 2 to other appropriate positions. As materials for forming the conductive structures 50 and 51, conductive pastes such as silver, gold or other metal pastes can be listed. In addition, conductive adhesives and any other suitable conductive materials can be used. The conductive structure 50 can also be formed into a linear shape extending from the side of the above-mentioned adhesion layer 3 and the first adhesive layer 2. For the conductive structure 51, the same linear shape can also be formed.

[0144] In addition, the first polarizing film 1 disposed on the visible side of the liquid crystal layer 20 and the second polarizing film 11 disposed on the opposite side of the visible side of the liquid crystal layer 20 can be used by stacking other optical films according to the adaptability of their respective configuration positions. As the above-mentioned other optical films, for example, reflective plates, semi-transmissive plates, phase difference films (including wavelength plates of 1 / 2, 1 / 4, etc.), viewing angle compensation films, brightness improvement films, etc. are sometimes used in the formation of liquid crystal display devices, etc. These can be used in one layer or two or more layers.

[0145] (Liquid Crystal Display Device)

[0146] The touch sensor function built-in liquid crystal display device using the in-cell liquid crystal panel C of the present invention can be suitably used to form a component of a liquid crystal display device such as a device using a backlight or a reflector in a lighting system.

[0147] Example

[0148] The present invention is specifically described below by manufacturing examples and embodiments, but the present invention is not limited to these embodiments. It should be noted that the parts and % in each example are weight basis. The room temperature storage conditions are 23°C 65% RH unless otherwise specified.

[0149] <Measurement of Weight Average Molecular Weight of (Meth)Acrylic Polymer>

[0150] 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.

[0151] Analytical device: HLC-8120GPC manufactured by Tosoh Corporation

[0152] ·Pillar: Made by Tosoh Corporation, G7000H XL +GMH XL +GMH XL

[0153] · Pillar size: 7.8mm φ x 30cm, total 90cm

[0154] Column temperature: 40℃

[0155] Flow rate: 0.8mL / portion

[0156] Injection volume: 100μL

[0157] · Elution: Tetrahydrofuran

[0158] Detector: Differential Refractometer (RI)

[0159] Standard sample: polystyrene

[0160] <Production of polarizing film>

[0161] A polyvinyl alcohol film with a thickness of 80 μm was dyed in a 0.3% iodine solution at 30°C for 1 minute between rollers with different speed ratios, and stretched to 3 times. Then, it was immersed in an aqueous solution containing 4% boric acid and 10% potassium iodide at 60°C for 0.5 minutes, and stretched to a total stretching ratio of 6 times. Next, it was immersed in an aqueous solution containing 1.5% potassium iodide at 30°C for 10 seconds, washed, and then dried at 50°C for 4 minutes to obtain a polarizer with a thickness of 30 μm. A triacetyl cellulose film with a thickness of 80 μm that was saponified was bonded to both sides of the polarizer using a polyvinyl alcohol adhesive to produce a polarizing film.

[0162] <Formation of surface treatment layer>

[0163] A hard coating resin composition (coating liquid) was prepared by mixing 100 parts of an ultraviolet curable acrylic resin (manufactured by Dainippon Ink and Chemicals Co., Ltd., UNIDIC17-806), 3 parts of a photopolymerization initiator (manufactured by Ciba Specialty Chemicals Co., Ltd., Irgacure 184), and 100 parts of toluene. The coating liquid was applied to one side of the polarizing film obtained above using a wire rod, and then heated and dried at 80°C for 1 minute to form a coating film. Next, the coating film was irradiated with a metal halide lamp at 300 mJ / cm 2 The coating was cured by ultraviolet light to form a hard coating with a thickness of 5 μm.

[0164] (Preparation of Materials for Forming Adhesion-Promoting Layer)

[0165] 8.6 parts of a solution containing 10 to 50% by weight of a thiophene polymer (trade name: Denatron P-580W, manufactured by Nagase ChemteX Co., Ltd.) and 10 to 50% by weight of a thiophene polymer were added. A solution of an oxazoline 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 solution for forming an anchor layer having a solid content concentration of 0.5 wt%. The coating solution for forming an anchor layer thus obtained contained 0.04 wt% of a polythiophene polymer and 0.04 wt% of Azoline acrylic polymer 0.25 wt%.

[0166] (Formation of adhesion promoting layer)

[0167] The coating liquid for forming an anchor layer was applied to one side of the polarizing film (the side without the hard coat layer) to a thickness after drying as shown in Table 1, and dried at 80°C for 2 minutes to form an anchor layer. The anchor layer obtained contained a thiophene polymer, a Azoline acrylic polymer 8 wt%, 50 wt%.

[0168] (Preparation of acrylic polymer)

[0169] A monomer mixture containing 74.8 parts of butyl acrylate, 23 parts of phenoxyethyl acrylate, 0.5 parts of N-vinyl-2-pyrrolidone (NVP), 0.3 parts of acrylic acid, and 0.4 parts of 4-hydroxybutyl acrylate was added to a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet tube, and a cooler. Furthermore, 0.1 parts of 2,2'-azobisisobutyronitrile as a polymerization initiator and 100 parts of ethyl acetate were added to 100 parts of the above monomer mixture (solid content), and nitrogen was introduced while slowly stirring to replace the nitrogen atmosphere. Then, the liquid temperature in the flask was maintained at about 55°C, and a polymerization reaction was performed for 8 hours to prepare a solution of an acrylic polymer having a weight average molecular weight (Mw) of 1.6 million and Mw / Mn=3.7.

[0170] (Preparation of Adhesive Composition)

[0171] To 100 parts of the solid content of the acrylic polymer solution obtained above, lithium bis(trifluoromethanesulfonyl)imide manufactured by Mitsubishi Materials Co., Ltd. was added as an ionic compound in the amounts shown in Table 1, and further 0.1 parts of an isocyanate crosslinking agent (Takenate D160N manufactured by Mitsui Chemicals, Inc., trimethylolpropane hexamethylene diisocyanate), 0.3 parts of benzoyl peroxide (NYPER BMT manufactured by NOF Corporation), and 0.2 parts of γ-glycidoxypropylmethoxysilane (KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd.) were added to prepare a solution of an acrylic adhesive composition.

[0172] (Formation of Adhesive Layer)

[0173] Next, the solution of the acrylic adhesive composition was applied to one side of a polyethylene terephthalate film (separator: manufactured by Mitsubishi Chemical Polyester Film Co., Ltd., MRF38) treated with a silicone release agent so that the thickness of the adhesive layer after drying was the thickness shown in Table 1, and dried at 155° C. for 1 minute to form an adhesive layer on the surface of the separator. The adhesive layer was transferred to a polarizing film with an adhesion-enhancing layer formed thereon or a polarizing film without an adhesion-enhancing layer formed thereon.

[0174] Examples 1 to 11 and Comparative Examples 1 to 4

[0175] An anchor layer and a pressure-sensitive adhesive layer were sequentially formed on one side (the side without the hard coat layer) of the polarizing film obtained above according to the combination shown in Table 1 to produce a pressure-sensitive adhesive layer-attached polarizing film.

[0176] In addition, in Example 11, the following surface protective film was bonded to the hard-coat layer side of the obtained pressure-sensitive adhesive layer-attached polarizing film, and then peeled off, thereby providing an antistatic layer.

[0177] <Production of surface protection film>

[0178] The (meth)acrylic polymer (A) and the pressure-sensitive adhesive solution shown below were prepared, and a surface protection film was produced by the following method using the pressure-sensitive adhesive solution.

[0179] [Preparation of (meth)acrylic polymer (A)]

[0180] In a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet tube, and a cooler, 100 parts of 2-ethylhexyl acrylate (2EHA), 10 parts of 4-hydroxybutyl acrylate (4HBA), 0.02 parts of acrylic acid (AA), 0.2 parts of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 157 parts of ethyl acetate were added, and nitrogen was introduced while slowly stirring. The liquid temperature in the flask was maintained at around 65°C, and a polymerization reaction was performed for 6 hours to prepare a (meth)acrylic polymer (A) solution (40% by weight). The weight average molecular weight of the acrylic polymer (A) was 540,000, and the glass transition temperature (Tg) was -67°C.

[0181] [Preparation of binder solution]

[0182] The (meth)acrylic polymer (A) solution (40%) was diluted to 20% with ethyl acetate, and to 500 parts of the solution (100 parts of solid content) were added 2 parts (0.2 parts of solid content) of a solution prepared by diluting an organopolysiloxane having an oxyalkylene chain (KF-353, manufactured by Shin-Etsu Chemical Co., Ltd.) as an organosilicon component with ethyl acetate to 10%, 15 parts (0.15 parts of solid content) of a solution prepared by diluting an alkali metal salt (ionic compound) of lithium bis(trifluoromethanesulfonyl)imide (LiN(CF3SO2)2:LiTFSI, manufactured by Tokyo Chemical Industry Co., Ltd.) as an antistatic agent with ethyl acetate to 1%, and an isocyanurate of hexamethylene diisocyanate (manufactured by Nippon Polyurethane Industry Co., Ltd., Coronate 600) as a crosslinking agent. An acrylic adhesive solution was prepared by mixing and stirring 1.75 parts by weight of 1,75 parts by weight of bis(isocyanatomethyl)cyclohexane (Mitsui Chemicals, Inc., Takenate 600) as a bifunctional isocyanate compound (0.3 parts by weight), and 2 parts by weight of dibutyltin dilaurate (1% ethyl acetate solution) as a crosslinking catalyst (0.02 parts by weight).

[0183] 〔Production of antistatic treatment film〕

[0184] An antistatic agent solution was prepared by diluting 10 parts of an antistatic agent (MICRO-SOLVER RMd-142 manufactured by SOLVEX, containing tin oxide and polyester resin as main components) with a mixed solvent consisting of 30 parts of water and 70 parts of methanol.

[0185] The obtained antistatic agent solution was applied onto a polyethylene terephthalate (PET) film (thickness: 38 μm) using a wire bar, and the solvent was removed by drying at 130° C. for 1 minute to form an antistatic layer (thickness: 0.2 μm), thereby producing an antistatic treated film.

[0186] [Production of surface protection film (adhesive sheet)]

[0187] The acrylic adhesive solution was applied to the surface of the antistatic treated film opposite to the antistatic treated surface, and heated at 130°C for 2 minutes to form an adhesive layer with a thickness of 15 μm. Next, the silicone treated surface of a polyethylene terephthalate film (thickness 25 μm) with silicone treated on one side was bonded to the surface of the adhesive layer to prepare a surface protective film.

[0188] In addition, in Comparative Example 1, a conductive polymer was not blended in the coating liquid for forming an anchor layer.

[0189] In Comparative Examples 2 and 3, no ionic compound was blended in the preparation of the adhesive composition.

[0190] The anchor layer of Comparative Example 4 was formed as follows.

[0191] 100 g of dipentaerythritol hexaacrylate, 10 g of photoinitiator (Irgacure 184, manufactured by Ciba Specialty Chemicals), 100 g of methanol, and 100 g of propylene glycol monomethyl ether (PGM) were fully mixed, uniformly mixed with a stirrer, and stirred for about 1 hour. Next, 40 g of AZO dispersion was gradually dropped into the prepared stirring liquid, and stirred for about 1 hour to fully mix it to prepare a coating liquid. Then, the prepared coating liquid was coated on a triacetyl cellulose film using a rod coater so that the thickness after curing was 4 μm, 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 ) and solidify it, thereby forming an adhesion-promoting layer.

[0192] The pressure-sensitive adhesive layer-attached polarizing films obtained in the above Examples and Comparative Examples were evaluated as follows.

[0193] <Surface resistance value (Ω / □): Conductivity>

[0194] The surface resistance values ​​of the anchor layer, the adhesive layer, and the surface treatment layer were measured.

[0195] The surface resistance value of the anchor layer was measured for the anchor layer-side surface of the polarizing film with an anchor layer before the pressure-sensitive adhesive layer was formed.

[0196] The surface resistance value of the adhesive layer was measured for the surface of the adhesive layer formed on the separator.

[0197] The surface resistance value of the surface treated layer of the pressure-sensitive adhesive layer-attached polarizing film was measured. In Example 11, the surface protection film was bonded to the pressure-sensitive adhesive layer-attached polarizing film and then peeled off, and then the surface resistance value of the surface treated layer was measured.

[0198] After the separator was peeled off from the obtained polarizing film with an adhesive layer, the surface resistance value of the adhesive layer surface was measured. The measurement was performed using MCP-HT450 manufactured by Mitsubishi Chemical Analytech. The measurement results are recorded in the top part of the cell recording other evaluation items in Table 1.

[0199] <ESD test>

[0200] After the separator is peeled off from the polarizing film with the adhesive layer, Figure 2 or Figure 3 As shown, it is bonded to the visible side of the embedded liquid crystal unit. Next, a 5 mm wide silver paste is applied to the side of the bonded polarizing film to cover the side of the hard coating, polarizing film, adhesion layer, and adhesive layer, and connected to the ground electrode from the outside. The liquid crystal display panel is mounted on a backlight device, and an electrostatic discharge gun (Electrostaticdischarge Gun) is fired at the polarizing film surface on the visible side with a voltage of 10 kV. The time until the white spot caused by electricity disappears is measured and judged according to the following criteria. In Example 1, the conductive structure is not formed using silver paste.

[0201] (Evaluation Criteria)

[0202] ◎◎: Within 1 second.

[0203] ◎: Within 3 seconds.

[0204] ○: More than 3 seconds to less than 5 seconds.

[0205] △: More than 5 seconds and less than 20 seconds.

[0206] ×: More than 20 seconds.

[0207] <TSP sensitivity>

[0208] The routing wiring (not shown) near the transparent electrode pattern inside the embedded liquid crystal unit was connected to the controller IC (not shown) to produce a liquid crystal display device with a built-in touch sensor function. The input display device of the liquid crystal display device with a built-in touch sensor function was observed with the naked eye while being used to confirm whether there was any malfunction.

[0209] ○: No error in the operation.

[0210] ×: There is malfunction.

[0211] <TSP sensitivity under humidification>

[0212] The touch sensor function built-in liquid crystal display device was placed in a humidified atmosphere of 60° C. / 90% RH for 120 hours, and then the TSP sensitivity was confirmed in the humidified atmosphere.

[0213] <Humidification durability test>

[0214] The pressure-sensitive adhesive layer-attached polarizing film was cut into a 15-inch size to prepare a sample, and the sample was bonded to a 0.7 mm thick alkali-free glass (EG-XG manufactured by Corning) using a laminator.

[0215] The sample was then autoclaved at 50°C and 0.5 MPa for 15 minutes to completely adhere to the alkali-free glass. The sample was treated in an atmosphere of 60°C and 90% RH for 500 hours, and the appearance between the polarizing film and the alkali-free glass was evaluated according to the following criteria.

[0216] (Evaluation Criteria)

[0217] ◎: There is absolutely no change in appearance such as blistering or peeling.

[0218] ○: There is slight peeling or blistering at the edge, but there is no problem in practical use.

[0219] △: There is peeling or blistering at the edge, but there is no problem in practical use unless it is used for special purposes.

[0220] ×: There is obvious peeling at the edge, which is problematic in practical use.

[0221]

[0222] In Table 1, Li-TFSI represents lithium bis(trifluoromethanesulfonyl)imide.

Claims

1. A polarizing film with an adhesive layer, which is used for an in-cell liquid crystal panel having an in-cell liquid crystal cell, the polarizing film with an adhesive layer comprising an adhesive layer and a polarizing film, The polarizing film with an adhesive layer comprises, in order: a first polarizing film, an adhesion-promoting layer, and a first adhesive layer. The adhesion-promoting layer contains a conductive polymer, and the first adhesive layer contains an antistatic agent. The thickness of the adhesion-promoting layer is 0.01 to 0.5 μm, and the surface resistance is 1×10 8 Ω / □~1×10 12 Ω / □, The first adhesive layer has a thickness of 5 to 100 μm and a surface resistance of 1×10 8 Ω / □~1×10 12 Ω / □, and The surface resistance value of the adhesive layer side of the polarizing film with an adhesive layer was 8.2×10 8 Ω / □~1×10 11 Ω / □.

2. The polarizing film with an adhesive layer according to claim 1, wherein The antistatic agent is an alkali metal salt and / or an organic cation-anion salt.

3. The polarizing film with an adhesive layer according to claim 2, wherein The alkali metal salt includes an anion portion containing a fluorine atom. 4 . The pressure-sensitive adhesive layer-attached polarizing film according to claim 1 , wherein: The adhesive layer comprises a (meth)acrylic polymer as a base polymer, The (meth)acrylic polymer contains 0.05 to 10% by weight of a carboxyl group-containing monomer in all structural units thereof.

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