WO2017183785A1

WO2017183785A1 - Display apparatus

Info

Publication number: WO2017183785A1
Application number: PCT/KR2016/013451
Authority: WO
Inventors: 신동명; 강경구; 김도영; 김영훈
Original assignee: 삼성에스디아이 주식회사
Priority date: 2016-04-21
Filing date: 2016-11-22
Publication date: 2017-10-26
Also published as: KR20170120461A

Abstract

Provided is a display apparatus comprising: a display unit; and a polarization- integrated transparent electrode film on the display unit, wherein the polarization-integrated transparent electrode film sequentially comprises: a transparent conductive layer; a first polarizer protection film; a polarizer; and a second polarizer protection film, and the first polarizer protection film is directly disposed on the transparent conductive layer.

Description

Display device

The present invention relates to a display device.

The touch panel includes resistive film type, optical type, capacitive type, ultrasonic type and electromagnetic induction type. The resistive film method has a feature that it is easy to reduce the weight of a relatively low-cost thin film, and external input is possible only by attaching it to the surface of a display, and is currently widely used, especially in a portable device. In recent years, the growth of portable devices such as mobile phones and information portable terminals has been remarkable, and visibility under sunlight and thin light weight are strongly demanded.

In the resistive touch panel, a fixed substrate with a transparent conductive film and a movable substrate with a transparent conductive film are disposed through spaces where the transparent conductive films face each other. The contact position is detected by detecting the resistance value of the film when the transparent conductive films are in contact with each other by pressing. Generally, the touch panel is mounted on the display surface. In this case, there are problems that the air layer becomes two layers and the visibility decrease due to reflection at each air interface is remarkable, and the device itself becomes thick.

In general, a capacitive touch panel attaches a polarizing plate using a pressure sensitive adhesive (PSA) layer on one surface of a liquid crystal panel, and then uses an optically clear adhesive (OCA) layer thereon. It adhere | attaches the film in which ITO was deposited, and has a structure which adhered the glass substrate on it. The touch panel having such a structure has a problem in that a multilayer structure is attached on the polarizer to increase the overall thickness of the device and deteriorate optical characteristics of the liquid crystal panel due to differences in refractive index, reflectance and transmittance of each layer.

Background art of the present invention is disclosed in Japanese Patent Laid-Open No. 2004-046729.

The problem to be solved by the present invention is to provide a display device that can prevent the pattern of the transparent conductive layer from being visible and improve the visibility of the display device.

Another problem to be solved by the present invention is to provide a display device capable of stacking a transparent conductive layer on a polarizing film without a point / adhesive layer, thereby reducing the thickness of the display device and making it easy to manufacture.

Another object of the present invention is to provide a display device capable of suppressing polarizer damage caused by metal nanowires of a transparent conductive layer.

The display apparatus of the present invention includes a display unit and a polarization integrated transparent electrode film formed on the display unit, wherein the polarization integrated transparent electrode film includes a transparent conductive layer, a first polarizer protective film, a polarizer, and a second polarizer protective film. These are sequentially formed, the first polarizer protective film may be formed directly on the transparent conductive layer.

The present invention provides a display device capable of acting as a base layer of the transparent conductive layer and preventing the pattern of the transparent conductive layer from being visible from the outside, and at the same time, improving the visibility of the display device.

The present invention provides a display apparatus which can laminate a transparent conductive layer on a polarizing film without a point / adhesive layer, thereby making the display apparatus thin, and making it possible to manufacture in a simple process.

The present invention provides a display device capable of suppressing polarizer damage due to metal nanowires of a transparent conductive layer.

1 is a cross-sectional view of a display device according to an embodiment of the present invention.

2 is a cross-sectional view of a display device according to another embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.

In the present specification, "upper" and "lower" are defined based on the drawings, and according to a viewpoint, "upper" may be changed to "lower" and "lower" to "upper", and "on" or What is referred to as “on” may include not only the above but also intervening other structures in the middle. On the other hand, what is referred to as "directly on" or "directly on" or "directly formed" means not intervening in the other structures.

As used herein, "(meth) acryl" refers to acrylic and / or methacryl. As used herein, “point / adhesive layer” includes a case where an adhesive layer, an adhesive layer alone or one or more adhesive layers, and an adhesive layer are stacked.

As used herein, "in-plane retardation (Re)" is a value at a wavelength of 550 nm and may be represented by the following formula A:

Re = (nx-ny) x d

In Equation A, nx denotes a refractive index in the x-axis direction of the optical element at a wavelength of 550 nm, ny denotes a refractive index in the y-axis direction of the optical element in a wavelength of 550 nm, and d denotes a thickness (unit: nm) of the optical element. .

Hereinafter, a display device according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a cross-sectional view of a display device according to an embodiment of the present invention.

Referring to FIG. 1, the display apparatus 100 according to an exemplary embodiment may include a display 110 and a polarization integrated transparent conductive film 120.

The display unit 110 drives the display apparatus 100 and may include a structure known to those skilled in the art according to the type of display apparatus.

The display unit 110 may include a substrate and an optical element such as an OLED, an LED, or an LCD formed on the substrate. The substrate may be a glass substrate, but may be used in a flexible display device as a flexible substrate. Specifically, the flexible substrate may include, but is not limited to, a substrate formed of silicon, polyimide, polycarbonate, polyacrylate, or the like. OLED, LED or LCD optical devices can include conventional structures known to those skilled in the art. In one embodiment, the display unit may be a panel for an organic light emitting display device including an OLED optical element including a substrate, a thin film transistor, an organic light emitting diode, a planarization layer, a protective film, an insulating film and the like. In another embodiment, the display unit may be a panel for a liquid crystal display including an LCD optical element having a liquid crystal layer formed on a substrate. The liquid crystal layer may adopt VA (vertical alignment) mode, IPS (in plane switching) mode, PLS (plane to line switching) mode, PVA (patterned vertical alignment) mode, or S-PVA (super-patterned vertical alignment) mode. However, it is not limited thereto.

The polarization integrated transparent conductive film 120 is formed on the display unit 110 to simultaneously implement a polarization function and a conductive function.

The polarization integrated transparent conductive film 120 is a transparent conductive layer 121, the first polarizer protective film 122, the polarizer 123 and the second polarizer protective film 124 are sequentially formed. The polarizing integrated transparent conductive film 120 has a polarizing film and a transparent conductive layer 121 formed integrally so that a multilayer film is not laminated on the polarizing film and the lower protective film of the polarizer is the base layer of the transparent conductive layer 121. Since the base layer of the transparent conductive layer 121 does not need to be formed separately, it is advantageous for thinning and can be manufactured in a simple process, and the optical properties of the display are deteriorated or the visibility is deteriorated due to the characteristics of each layer having different optical properties. It doesn't work.

The transparent conductive layer 121 may be formed on the display unit 110 to provide conductive and touch panel functions to the display device. The transparent conductive layer 121 may be patterned to form a touch panel. Therefore, in the display device 100 of the exemplary embodiment, since the transparent conductive layer 121 is formed under the polarizer 123, the pattern of the transparent conductive layer 121 is not visually recognized by the polarizer 123, and the display device is displayed. I can improve the visibility. In addition, in order for the transparent conductive layer 121 to operate by a finger touch, a certain distance must be maintained between the transparent conductive layer 121 and the finger. The first polarizer protective film 122 is formed on the transparent conductive layer 121. The multilayer film such as the polarizer 123 and the second polarizer protective film 124 is formed so that it can be operated without additional layers such as a conventional dummy film.

Since the transparent conductive layer 121 is integrally formed with the first polarizer protective film 122, the transparent conductive layer 121 may function as a touch electrode while preventing a damage of the polarizer due to external moisture. The "integrated type" means that the transparent conductive layer 121 and the first polarizer protective film 122 are not separated by physical force, and between the transparent conductive layer 121 and the first polarizer protective film 122. In other words, it means a state in which a point / adhesive layer is directly interposed without other layers such as a point / adhesive layer. The thickness of the laminate of the transparent conductive layer 121 and the first polarizer protective film 122 may be about 10 μm to about 150 μm, specifically about 20 μm to about 100 μm. In addition, as the thickness of the transparent conductive layer 121 and the first polarizer protective film 130 is thinner than the thickness of the second polarizer protective film 124, a thinner device may be manufactured and easier to use in a flexible device.

The transparent conductive layer 121 is formed directly on the first polarizer protective film 122. Therefore, the transparent conductive layer 121 is laminated on the first polarizer protective film 122 without using a dot / adhesive layer such as an optical clear adhesive (OCA), so that the display device can be thinned and manufactured in a simple process. You can do that. For example, the transparent conductive layer 121 may be formed by applying a composition for forming a transparent conductive layer to the first polarizer protective film 122. The transparent conductive layer 121 may include a conductive network and a matrix impregnated with the conductive network.

The conductive network is formed of metal nanowires to provide flexibility to the transparent conductive layer 121. The aspect ratio of the metal nanowires may be about 10 to about 5,000. The diameter of the cross section of the metal nanowire may be greater than about 0 nm and about 100 nm or less, specifically about 10 nm to about 100 nm, more specifically about 10 nm to about 30 nm. The longest length of the metal nanowires may be about 20 μm or greater, specifically about 20 μm to about 50 μm. In the above range, it is possible to increase the conductivity of the transparent conductive layer and lower the sheet resistance. The metal nanowires may be formed of a metal comprising at least one of silver, copper, aluminum, nickel and gold, specifically silver. The conductive network may be formed by a wet thin film coating, but is not limited thereto.

The matrix is formed directly on the first polarizer protective film 122 to strengthen the bonding between the first polarizer protective film 122 and the transparent conductive layer 121 and to prevent oxidation of the metal nanowires, thereby preventing the sheet resistance of the transparent conductive layer. You can stop the rise.

The matrix is formed of a matrix composition containing a 5- or more functional (meth) acrylic compound, a trifunctional to tetrafunctional (meth) acrylic compound, and an initiator, thereby supporting the transparent conductive layer 121 to support the first polarizer protective film. Minimize the influence on the phase difference of the 122 and can improve the optical properties of the conductive network formed of metal nanowires.

The 5- or more functional (meth) acrylic compounds may include one or more of 5- to 10-functional (meth) acrylic monomers and 5- to 10-functional (meth) acrylic oligomers, and may include conventional types known to those skilled in the art. Can be. In this case, while the matrix supports the transparent conductive layer 121, the optical characteristics of the transparent conductive layer 121 can be further improved.

The 5- or 10-functional (meth) acrylic monomer is a 5- or 10-functional (meth) acrylic monomer of a C3 to C20 polyhydric alcohol, for example, dipentaerythritol penta (meth) acrylate or dipentaerytate. It may include one or more of ritol hexa (meth) acrylate, caprolactone modified dipentaerythritol penta (meth) acrylate, caprolactone modified dipentaerythritol hexa (meth) acrylate.

The 5- or 10-functional (meth) acrylic oligomer is a 5- or 10-functional urethane (meth) acrylate oligomer, polyester (meth) acrylate oligomer, epoxy (meth) acrylate oligomer, silicone-containing (meth) acryl One or more of the rate oligomers.

The trifunctional to tetrafunctional (meth) acrylic compound may include one or more of non-urethane based (meth) acrylic monomers having no urethane group, and may include conventional (meth) acrylic compounds known to those skilled in the art. In this case, while the matrix supports the transparent conductive layer 121, the optical characteristics of the transparent conductive layer 121 can be further improved.

The trifunctional or tetrafunctional (meth) acrylic monomers are, for example, trimethylolpropane tri (meth) acrylate, glycerol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) (Meth) acrylic monomers of non-modified C3 to C20 polyhydric alcohols comprising at least one of acrylates, ethoxylated trimethylolpropanetri (meth) acrylates, propoxylated glyceryltri (meth) acrylates Alkoxy groups containing at least one of the (meth) acrylic monomers of C3 to C20 polyhydric alcohols modified with an alkoxy group containing at least one of the rates (e.g., C1 to C5 alkoxy groups such as ethoxy groups, propoxy groups Or a (meth) acrylic monomer of C3 to C20 polyhydric alcohol modified with a butoxy group). The (meth) acrylic monomer of the C3 to C20 polyhydric alcohol modified with the alkoxy group can improve the light transmittance and reliability of the transparent conductive layer more than the (meth) acrylic monomer of the non-modified C3 to C20 polyhydric alcohol, and fine pattern May be more favorable to anger.

The initiator may comprise one or more of a photopolymerization initiator and a thermal polymerization initiator. The initiator may comprise a photopolymerization initiator having an absorption wavelength of about 150 nm to about 500 nm. Specifically, the initiator may be at least one of an alpha-hydroxy ketone system or an alpha-amino ketone system, for example 1-hydroxycyclohexylphenylketone.

The matrix composition may further include at least one of an adhesion promoter, an antioxidant, a low refractive index agent, a solvent, and an additive.

The adhesion promoter may include one or more of a silane coupling agent, a monofunctional (meth) acrylic monomer, and a bifunctional (meth) acrylic monomer.

The silane coupling agent may use a conventionally known silane coupling agent. Specifically, the silane coupling agent has a silane having an epoxy group such as 3-glycidoxyoxytrimethoxysilane, 3-glycidoxyoxymethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and the like. Coupling agents; Polymerizable unsaturated group-containing silane coupling agents such as vinyl trimethoxysilane, vinyltriethoxysilane and (meth) acryloxypropyltrimethoxysilane; 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyl One or more of amino group-containing silane coupling agents such as dimethoxysilane can be used.

Monofunctional or bifunctional (meth) acrylic monomers are mono- or difunctional (meth) acrylic monomers of C3 to C20 polyhydric alcohols, including isobornyl (meth) acrylate, cyclopentyl (meth) acrylate, Cyclohexyl (meth) acrylate, trimethylolpropane di (meth) acrylate, ethylene glycol di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate, neopentylglycol di (meth) acrylate, hexane Dioldi (meth) acrylate, cyclodecanedimethanol di (meth) acrylate.

Antioxidants include one or more of phosphorus antioxidants such as phosphite, HLS (Hinder amine light stabilizer) antioxidants, phenolic antioxidants, metal acetylacetonate antioxidants, triazole antioxidants, triazine antioxidants can do. Specifically, the phosphorus antioxidant is tris (2,4-di-tert-butylphenyl) phosphite, and the phenolic antioxidant is pentaerythritol tetrakis (3- (3,5-di-tert-butyl-4-hydrate Hydroxyphenyl) propionate HALS-based antioxidants are bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (2,2,6,6-tetramethyl -4-piperidinyl) sebacate, bis (2,2,6,6-tetramethyl-5-piperidinyl) sebacate, 4-hydroxy-2,2,6,6-tetramethyl-1- Dimethylsuccinate copolymer with piperidine-ethanol, 2,4-bis [N-butyl-N- (1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl ) Amino] -6- (2-hydroxyethylamine) -1,3,5-triazine, etc. The metal acetylacetonate-based antioxidant is tris (acetylacetonato) Iron (III), tris (acetylacetonato) chrome (III), and the like, but are not limited thereto. Do not.

The low refractive index agent lowers the refractive index of the transparent conductive layer, and may include one or more of hollow silica and a fluorine compound. The solvent increases the coating property of the composition for the matrix, and may include one or more of a ketone solvent and an alcohol solvent.

The additives may include one or more of antistatic agents, ultraviolet absorbers, viscosity modifiers, heat stabilizers, dispersants, thickeners.

In one embodiment, the composition for the matrix comprises about 60% to about 85% by weight of the at least 5 functional (meth) acrylic compound, about 15% to about 30% by weight of the bifunctional to tetrafunctional (meth) acrylic compound, and an initiator About 1% to about 15% by weight. In this range, all the effects of the above-described matrix can be implemented. The adhesion promoter, the antioxidant, and the low refractive index agent may be included in an amount of about 0.01 part by weight to about 15 parts by weight based on 100 parts by weight of a total of five or more functional (meth) acrylic compounds, bifunctional to tetrafunctional (meth) acrylic compounds, and an initiator. Can be. In the above range, the effect can be implemented without affecting the transparent conductivity.

The transparent conductive layer 121 may have a thickness of about 50 nm to about 150 nm, specifically about 50 nm to about 80 nm. In the above range, it can be used in the display device. Although not shown in FIG. 1, the transparent conductive layer 121 may be formed on the display unit 110 by a dot / adhesive layer. The point / adhesive layer may be formed of conventional adhesives known to those skilled in the art, for example, (meth) acrylic, epoxy, silicone adhesives, and the like, but is not limited thereto. The point / adhesive layer may have a thickness of about 200 μm or less, specifically about 20 μm to about 100 μm.

The first polarizer protective film 122 is formed on the polarizer 123, formed directly on the transparent conductive layer 121, to protect and support the polarizer 123, and to support the transparent conductive layer 121, Damage to the polarizer 123 due to the metal nanowires of the transparent conductive layer 121 may be prevented.

The first polarizer protective film 122 may be a phase-free film (zero retardation film) having a phase difference or no phase difference according to the type of the display unit 110. When the first polarizer protective film 122 is a phase difference film of which Re is substantially close to about 0 nm, there is no distortion of the light to improve the viewing angle and improve the response speed of the light. The term "substantially close to about 0 nm" may include not only 0 nm but generally 10 nm or less. When the first polarizer protective film 122 is a phase difference film having a phase difference in a predetermined range, visibility of the display device may be improved. Specifically, the first polarizer protective film 122 may have a phase difference of Re of about 110 nm to about 160 nm, more specifically about 130 nm to about 140 nm, and more specifically, lambda / 4 phase difference film is a quarter-wave retardation film This can be Specifically, the first polarizer protective film 122 may have a phase difference of about 200 nm to about 350 nm, more specifically, about 225 nm to about 300 nm, and more specifically, a lambda / 2 phase difference film that is a half-wave retardation film. Can be. Alternatively, specifically, the first polarizer protective film 122 may have Re of about 8,000 nm or more, more specifically about 10,000 nm or more, more than about 10,000 nm, and more specifically about 10,100 nm to about 15,000 nm. Within this range, rainbow stains can be prevented from being recognized.

In this case, the in-plane retardation Re of the laminate of the transparent conductive layer 121 and the first polarizer protective film 122 may be about 200 nm to about 300 nm at a wavelength of 550 nm. In the above range, the effect can be implemented. The first polarizer protective film 122 may have the same or different in-plane retardation Re as the second polarizer protective film 124 described below.

The first polarizer protective film 122 may be an optically transparent polymer film or liquid crystal film. Specifically, the first polarizer protective film 122 may be a film having a light transmittance of about 80% or more, specifically about 80% to about 100% at a wavelength of 550nm. In one embodiment, the first polarizer protective film is a polyester, including polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate, cellulose esters including cycloolefin polymer, triacetyl cellulose, and the like, It may be a film formed of a non-liquid crystalline polymer formed of at least one of poly (meth) acrylate, silicone, including polycarbonate, polyimide, polystyrene, polyethersulfone, polymethylmethacrylate, and the like. Specifically, the first polarizer protective film may be a film obtained by stretching the film formed of the resin at a predetermined draw ratio. In another embodiment, the thickness of the first polarizer protective film having a phase difference may be significantly reduced by increasing the refractive index difference obtained by the film formed of the liquid crystal compared to the non-liquid crystalline polymer. As a liquid crystal material, a liquid crystal monomer and a liquid crystal polymer are possible, and liquid crystal may be either lyotropic or thermotropic. Specifically, the liquid crystal monomer may be a nematic liquid crystal monomer, and after the alignment of the liquid crystal monomer, the alignment state of the liquid crystal may be fixed by polymerizing or crosslinking the liquid crystal monomer. The first polarizer protective film 122 has a thickness of about 50 μm or less, specifically about 10 μm to about 50 μm, for example, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm , 45 μm, 50 μm. In the above range, it can be used in the display device.

The polarizer 123 may be formed on the first polarizer protective film 122 to emit incident light by linearly polarized light.

The polarizer 123 is optically transparent and may be a polyvinyl alcohol polarizer or a liquid crystal polarizer. Specifically, the polarizer is a polyvinyl alcohol polarizer prepared by adsorbing a dichroic substance such as iodine on a polyvinyl alcohol film, uniaxially stretched, a polyene polarizer obtained by dehydrating a polyvinyl alcohol film with a dehydration catalyst such as an organic acid, Alternatively, a cholesteric liquid crystal, a lyotropic liquid crystal, or the like may be aligned in a specific direction after coating or transfer to form a liquid crystal polarizer that induces polarization according to the alignment direction. The polarizer 123 has a thickness of about 50 μm or less, about 5 μm or less, specifically about 10 μm to about 30 μm, about 1 μm to about 5 μm, for example, 1 μm, 2 μm, 3 μm, 4 μm , 5 μm. In the above range, it can be used in the display device.

The second polarizer protective film 124 may be formed on the polarizer 123, that is, on the polarizer 123 to protect the polarizer 123.

The second polarizer protective film 124 may have the same or different Re as the first polarizer protective film 122. Specifically, when the first polarizer protective film 122 and heterogeneous Re, the second polarizer protective film 124 has a Re of about 8,000 nm or more, specifically about 10,000 nm or more, more specifically about 10,000 nm, More specifically, it may be about 10,100nm to about 15,000nm. Within this range, rainbow stains can be prevented from being recognized. By controlling the Re of the first polarizer protective film 121 and the second polarizer protective film 124, the visibility of the display device can be improved. When the first polarizer protective film 122 has the same Re, the second polarizer protective film 124 may specifically have a phase difference of about 110 nm to about 160 nm, more specifically about 130 nm to about 140 nm. For example, it may be a λ / 4 retardation film which is a quarter-wave retardation film. Alternatively, the second polarizer protective film 124 may have a phase difference of Re of about 200 nm to about 350 nm, more specifically about 225 nm to about 300 nm, and may be, for example, a lambda / 2 phase difference film that is a half-wave retardation film. Can be.

In one embodiment, the first polarizer protective film may have a phase difference of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm, and more specifically, may be a λ / 4 phase difference film which is a quarter-wave retardation film. The second polarizer protective film may have Re of about 8,000 nm or more, specifically about 10,000 nm or more, more specifically about 10,000 nm or more, and more specifically about 10,100 nm to about 15,000 nm.

The second polarizer protective film 124 may be an optically transparent polymer film. Specifically, the second polarizer protective film 124 may be a film having a light transmittance of about 80% or more, specifically about 80% to about 100% at a wavelength of 550nm. Specifically, the resin may be a polyester resin including polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate, or the like, a cellulose ester resin or polycarbonate resin including a cycloolefin polymer resin, triacetyl cellulose, or the like. , Polyimide resin, polystyrene resin, polyether sulfone resin, poly (meth) acrylate resin, including polymethyl methacrylate, and the like may include one or more of, but not limited to. The second polarizer protective film 124 has a thickness of about 10 μm to about 200 μm, specifically about 30 μm to about 100 μm, for example, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm , 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm. It can be used for the conductive window film in the above range.

Although not shown in FIG. 1, a functional layer may be further formed on one or both surfaces of the second polarizer protective film 124. The functional layer is anti-reflection, low reflection, hard coating, anti-glare, anti-finger, anti-contamination, diffusion, One or more of the refractive functions may be provided. The functional layer may be formed as an independent layer separate from the second polarizer protective film 124 or may be formed by treating one surface of the second polarizer protective film 124 so that one surface of the second polarizer protective film 124 becomes a functional layer. Can be.

In addition, although not shown in FIG. 1, the polarizer 123 may be attached to each other by a dot / adhesive layer with the first polarizer protective film 122 and the second polarizer protective film 124, respectively. The adhesive layer may be formed of a pressure sensitive adhesive (PSA), an optically clear adhesive (OCA), or the like. Specifically, the adhesive layer may be formed of a photocurable adhesive composition including an epoxy compound, a (meth) acrylic compound, and a photoinitiator. The epoxy compound may include at least one of alicyclic epoxy, aromatic epoxy, aliphatic epoxy, and hydrogenated epoxy compounds, and the specific types thereof are as known to those skilled in the art.

The (meth) acrylic compound may include a conventional (meth) acrylic compound known to those skilled in the art, for example, one or more (meth) acrylates having one or more hydroxyl groups, or one having one or more hydroxyl groups. (Meth) acrylate having from 10 to (meth) acrylate and unsubstituted alkyl group having 1 to 10 carbon atoms, (meth) acrylate having 6 to 20 carbon atoms aromatic group, having alicyclic group having 3 to 10 carbon atoms ( One or more of meth) acrylates.

The photoinitiator may include one or more of a photosensitizer and a photoacid generator, and the specific types thereof are as known to those skilled in the art. The photocurable adhesive composition may further include conventional additives such as antioxidants, ultraviolet absorbers, conductivity giving additives, viscosity modifiers and the like, as long as they do not affect the adhesion.

The dot / adhesive layer may have a thickness of about 1 μm to about 200 μm, specifically about 10 μm to about 100 μm. In the above range, it can be used in the display device, it is possible to stably adhere the polarizer to the polarizer protective film. For this reason, peeling or bubble generation between the polarizer, the first polarizer protective film 122 and the second polarizer protective film 124 can be suppressed.

In addition, although not shown in FIG. 1, a window film may be formed on the second polarizer protective film 124. The window film may display a display image, and may protect an optical element such as a polarizer. The window film may be formed of a glass or plastic material, and specifically, may be formed of a silicone-based resin. The window film may be laminated to the second polarizer protective film 124 by a point / adhesive layer.

Hereinafter, a display apparatus according to another exemplary embodiment of the present invention will be described with reference to FIG. 2. 2 is a cross-sectional view of a display device according to another embodiment of the present invention.

Referring to FIG. 2, the display device 200 according to another embodiment includes the polarization integrated transparent conductive film 120 ′ instead of the polarization integrated transparent conductive film 120, but the display device according to the exemplary embodiment of the present invention. Substantially the same as (100). In the polarization integrated transparent conductive film 120 ′, a third polarizer protective film 125 is further formed between the first polarizer protective film 122 and the polarizer 123, such that the transparent conductive layer 121 and the first polarizer protective film are formed. And 122, the third polarizer protective film 125, the polarizer 123, and the second polarizer protective film 124. The transparent conductive layer 121, the first polarizer protective film 122, the polarizer 123, and the second polarizer protective film 124 are as described above. Thus, only the third polarizer protective film 125 will be described.

The third polarizer protective film 125 is formed on the first polarizer protective film 122 and the polarizer 123 to protect the polarizer 123 and together with the first polarizer protective film 122 for visibility of the display device. It may also improve or reduce pattern visibility.

The third polarizer protective film 125 may have an in-plane phase difference at a wavelength of 550 nm of the same or different type as that of the first polarizer protective film 122 and the second polarizer protective film 124, thereby improving visibility of the display device. In one embodiment, the third polarizer protective film may have a phase difference of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm, and more specifically, may be a λ / 4 phase difference film, and in another embodiment, The third polarizer protective film may have a Re of about 200 nm to about 350 nm, in particular, a phase difference of about 225 nm to about 300 nm, more specifically, may be a λ / 2 phase difference film, and in yet another embodiment, the third polarizer protective film Silver Re can be a zero retardation film with about 10 nm or less. Specifically, the first polarizer protective film 122, the second polarizer protective film 124, and the third polarizer protective film 125 are each polarized integrated transparent electrode film 120 at a wavelength of 550nm to be a film different from each other in-plane retardation Re It is possible to improve the visibility of the display by thinning ') and without laminating additional films.

The third polarizer protective film 125 may have an appropriate phase difference together with the first polarizer protective film 122 to improve visibility of the display device. In one embodiment, the third polarizer protective film 125 may have a retardation of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm, and more specifically, may be a λ / 4 phase difference film. The polarizer protective film 122 may have a retardation of Re of about 200 nm to about 350 nm, specifically about 225 nm to about 300 nm, and more specifically, may be a λ / 2 retardation film. In another embodiment, the third polarizer protective film 125 may have a retardation of Re of about 200 nm to about 350 nm, specifically about 225 nm to about 300 nm, and more specifically, may be a λ / 2 retardation film. The polarizer protective film 122 may have a retardation of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm, and more specifically, may be a λ / 4 retardation film. In another embodiment, the third polarizer protective film 125 may have a phase difference of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm, and more specifically, may be a λ / 4 phase difference film. The one polarizer protective film 122 may be a phase difference film. In another embodiment, the third polarizer protective film 125 may be a phase-free film, and the first polarizer protective film 122 may have a retardation of Re of about 110 nm to about 160 nm, specifically about 130 nm to about 140 nm. And more specifically a λ / 4 retardation film. In this case, the second polarizer protective film 124 has a Re of about 8,000 nm or more, specifically about 10,000 nm or more, more specifically about 10,000 nm or more, and more specifically about 10,100 nm to about 15,000 nm, thereby preventing rainbow staining. And better visibility.

The third polarizer protective film 125 is optically transparent and may be formed of the same or different materials as the first polarizer protective film 122 described above. The third polarizer protective film 125 has a thickness of about 10 μm to about 200 μm, specifically about 30 μm to about 100 μm, for example, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm , 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm. In the above range, it can be used in the display device. Although not shown in FIG. 2, a dot / adhesive layer may be formed between the third polarizer protective film 125 and the first polarizer protective film 122, and the dot / adhesive layer is as described above.

Simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Claims

A display unit, and a polarization-integrated transparent electrode film formed on the display unit,

The polarizing integrated transparent electrode film is a transparent conductive layer, a first polarizer protective film, a polarizer, and a second polarizer protective film is formed sequentially,

The first polarizer protective film is formed directly on the transparent conductive layer, the display device.
The display apparatus of claim 1, wherein the polarizer is spot / bonded with the first polarizer protective film and the second polarizer protective film by a dot / adhesive layer.
The display device of claim 1, wherein the transparent conductive layer comprises a conductive network formed of metal nanowires, and a matrix impregnated with the conductive network.
The display device of claim 3, wherein the metal nanowires comprise silver nanowires.
The display device according to claim 3, wherein the matrix is formed of a composition for a matrix containing a 5- or more functional (meth) acrylic compound, a bifunctional to tetrafunctional (meth) acrylic compound, and an initiator.
The method of claim 1, wherein the first polarizer protective film and the second polarizer protective film are respectively a phase difference film at a wavelength of 550 nm, a film having Re of about 110 nm to about 160 nm at a wavelength of 550 nm, and a Re of about 200 nm to about 350 nm at a wavelength of 550 nm. And a phosphorus film and a film having a Re of 8,000 nm or more at a wavelength of 550 nm.
The display device of claim 1, wherein the first polarizer protective film is a polymer film or a liquid crystal film.
The display apparatus of claim 1, wherein a third polarizer protective film is further formed between the first polarizer protective film and the polarizer.
The film of claim 8, wherein the third polarizer protective film is formed from a phase-free film at a wavelength of 550 nm, a film having Re of about 110 nm to about 160 nm at a wavelength of 550 nm, and a film having Re of about 200 nm to about 350 nm at a wavelength of 550 nm. The selected display device.
The display device according to claim 8, wherein the first polarizer protective film, the second polarizer protective film, and the third polarizer protective film are films different from each other at a wavelength of 550 nm.
The display device according to claim 8, wherein the first polarizer protective film and the third polarizer protective film are each selected from an out of phase difference film at a wavelength of 550 nm and a film having Re of about 110 nm to about 160 nm at 550 nm.
The method of claim 8, wherein the first polarizer protective film and the third polarizer protective film each independently include a film having a Re of about 110 nm to about 160 nm at a wavelength of 550 nm, and a film having a Re of about 200 nm to about 350 nm at a wavelength of 550 nm. And a display device selected from the group.
The display apparatus of claim 1, wherein the display unit comprises an organic light emitting display panel or a liquid crystal display panel.