KR20150024184A - Transparent conductor and optical display apparatus comprising the same - Google Patents

Transparent conductor and optical display apparatus comprising the same Download PDF

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Publication number
KR20150024184A
KR20150024184A KR20130101337A KR20130101337A KR20150024184A KR 20150024184 A KR20150024184 A KR 20150024184A KR 20130101337 A KR20130101337 A KR 20130101337A KR 20130101337 A KR20130101337 A KR 20130101337A KR 20150024184 A KR20150024184 A KR 20150024184A
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South Korea
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transparent conductor
layer
conductive film
transparent
conductor according
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KR20130101337A
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Korean (ko)
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신동명
강경구
임형태
구영권
김도영
황오현
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제일모직주식회사
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Publication of KR20150024184A publication Critical patent/KR20150024184A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Non-Insulated Conductors (AREA)

Abstract

A transparent conductor according to the present invention includes a substrate layer; a first hard coating layer which is formed on the substrate layer and has a refractive index of 1.8 or more; and a transparent conductive film formed on the first hard coating layer. The transparent conductive film can reduce or prevent the increase of haze even in a high temperature process, and can solve a problem in a patenting process.

Description

TECHNICAL FIELD [0001] The present invention relates to a transparent conductor and an optical display device including the transparent conductor.

The present invention relates to a transparent conductor and an optical display device including the transparent conductor. More specifically, the present invention relates to a transparent conductor capable of preventing or reducing an increase in haze during a high-temperature process and solving the problem of pattern visibility, and an optical display device including the transparent conductor.

BACKGROUND ART [0002] Conductive films, particularly transparent conductive films, are used in various fields such as touch screen panels (TSP), flexible displays, electronic paper (E-paper), and solar cells included in display devices. Accordingly, studies on transparent conductive films have been actively conducted. The transparent conductive film should have good basic properties such as transparency and sheet resistance.

Conventionally, an indium tin oxide (ITO) film has been used as such a transparent conductive film. The ITO film is dry-deposited on a base film (base layer) to be manufactured as a transparent conductor, and is economical and excellent in transparency. The ITO film can be generally used by being deposited on a glass. However, the ITO film has a problem that the resistance may increase due to the characteristics of the ITO itself, and the bending property is poor.

Therefore, recently, a transparent conductor in which a transparent conductive film (transparent conductive layer) containing metal nanowires such as silver nanowires is formed has been developed. In general, a transparent conductive film containing only a metal nanowire has low adhesion and solvent resistance to a substrate, and thus a transparent conductive film is produced by coating an overcoating layer on a metal nanowire. For example, Korean Patent Laid-Open Nos. 2008-0066658 and 2009-0112626 disclose transparent conductors comprising a plurality of metal nanowires.

As such a transparent conductor, a polyester such as polyethylene terephthalate (PET), polycarbonate (PC), or a cycloolefin polymer (COP) is used as a base film. Among them, a polyester base film such as PET has an advantage in that it is economical compared with a base film such as PC and COP, but has a low heat resistance and may shrink or expand during a high temperature process such as a patterning process, (Haze increase, etc.) of the optical characteristics of the transparent conductor.

Therefore, even when a polyester base film such as PET is used, it is necessary to develop a transparent conductor capable of preventing or reducing deterioration of optical characteristics.

Normally, the transparent conductor removes a portion corresponding to the non-channel region of the transparent conductive film (conductive layer) through etching, leaves a transparent conductive film (conductive layer) only in the channel region, By forming a wiring electrically connected to the external device at the terminal, electricity flows only to the channel region.

However, when the transparent conductive film in the non-channel region is removed by etching, the difference in optical characteristics such as light transmittance and light reflectance in the channel region in which the transparent conductive film is present and in the non-channel region in which the transparent conductive film is not present There is a problem that a pattern is seen from the outside. In general, since the touch panel (TSP) or the like is placed over a display device such as a liquid crystal display device, the image displayed on the display device reaches the observer through the touch panel. As described above, , The display quality is significantly degraded.

Therefore, it is necessary to develop a transparent conductor capable of solving the problem of pattern visibility as well as a problem of deterioration of optical characteristics.

An object of the present invention is to provide a transparent conductor which can prevent or reduce deterioration of optical characteristics (haze increase) even after a pattern formation process proceeding at 120 ° C or higher, and which does not cause pattern visibility problems.

Another object of the present invention is to provide an optical display device including the transparent conductor.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the invention relates to a transparent conductor. The transparent conductor comprises a base layer; A first hard coating layer formed on the base layer and having a refractive index of 1.8 or higher; And a transparent conductive film formed on the first hard coating layer.

In an embodiment, the substrate layer may comprise at least one of polyester, polycarbonate, cycloolefin polymer, polysulfone, polyimide, silicone, polystyrene, polyacrylic, and polyvinyl chloride.

In an embodiment, the substrate layer may comprise polyethylene terephthalate.

In an embodiment, the thickness of the substrate layer may be between 10 and 250 탆.

In an embodiment, the first hard coating layer may have a refractive index of 1.8 to 1.9.

In an embodiment, the first hard coating layer may comprise a high refractive index nanoparticle and a binder.

In an embodiment, the thickness of the first hard coat layer may be 0.04 to 1 m.

In an embodiment, the transparent conductive film may include metal nanowires.

In an embodiment, the thickness of the transparent conductive film may be 10 nm to 1 탆.

In an embodiment, the transparent conductor may further include a second hard coat layer on both sides of the base layer.

In a specific example, the transparent conductor may have a haze variation of 5% or less after pattern formation at 120 ° C or higher.

Another aspect of the present invention relates to an optical display device. The optical display device includes the transparent conductor.

The present invention provides a transparent conductor which can prevent or reduce optical property degradation (haze increase) even after pattern formation proceeding at 120 ° C or higher and has no problem of pattern visibility, and an optical display device including the transparent conductor And has the effect of the invention.

1 is a cross-sectional view of a transparent conductor according to an embodiment of the present invention.
2 is a cross-sectional view of a transparent conductor according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view (schematic view) of a transparent conductor according to an embodiment of the present invention. 1, a transparent conductor according to the present invention includes a base layer 10, a first hard coat layer 20 having a refractive index of 1.8 or more formed on the base layer, And a transparent conductive film (30) formed on the first hard coat layer (20).

In the specification of the present invention, the terms "above" and "below" are based on the drawings.

As the base layer 10 used in the present invention, a base layer (base film) used in a usual transparent conductor having flexibility and transparency can be used. The base layer 10 may include at least one of polyester, polycarbonate, cycloolefin polymer, polysulfone, polyimide, silicone, polystyrene, polyacrylic, and polyvinyl chloride, for example, polyethylene terephthalate A polyester such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), specifically, polyethylene terephthalate.

The thickness of the base layer 10 may be 10 to 250 占 퐉, preferably 15 to 150 占 퐉. In this range, the transparent conductive film can be sufficiently supported, and flexibility can be excellent.

The first hard coating layer 20 used in the present invention can minimize a difference in optical characteristics between a channel region and a non-channel region of the transparent conductive film 30, and a coating layer having a refractive index of 1.8 or more can be used. For example, the first hard coating layer 20 may include high refractive index nanoparticles and a binder.

In one embodiment, the high refractive index nanoparticles are selected from the group consisting of titanium dioxide, alumina, titanium oxide, zirconium oxide, cerium oxide, hafnium oxide, niobium pentoxide, tantalum pentoxide, indium oxide, tin oxide, indium tin oxide, Calcium carbonate, barium sulfate, magnesium oxide, triazine-based polymers, mixtures thereof, and the like.

The binder may be a UV curable binder resin such as an acryl-based polymer such as methyl methacrylate, an epoxy-based polymer, a fluoropolymer, or a styrene-based polymer, but is not limited thereto.

In the first hard coating layer 20, the content of the high refractive index nano-particles may be 100 to 2,000 parts by weight, for example, 200 to 2,000 parts by weight based on 100 parts by weight of the binder. The refractive index of the hard coating layer prepared in the above range may be 1.8 or more.

In an embodiment, the first hard coating layer 20 may be formed from a composition for a hard coating layer including the high-refractive-index nanoparticles in the above-mentioned contents, monomers, oligomers, initiators and the like capable of forming the binder. For example, the composition is coated on a base film or the like by bar coating or spin coating, dried at 60 to 120 ° C for 1 to 30 minutes, purged with nitrogen, and dried at 500 mJ / cm 2 Or more by UV curing, but the present invention is not limited thereto. Commercialized coating compositions may also be used.

The initiator may use a photopolymerization initiator capable of absorbing an absorption wavelength of 150 to 500 nm to exhibit a photoreaction, without limitation. For example, the initiator may include a phosphine oxide series, an alpha-hydroxy ketone series, and the like. Specifically, it may include bis-acyl-phosphine oxide, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, 1-hydroxycyclohexyl phenyl ketone, or a mixture thereof. The content of the initiator may be 0.1 to 10% by weight, based on the total hard coating composition, but is not limited thereto.

The first hard coating layer 20 may have a refractive index of 1.8 or more, for example, 1.8 to 1.9 as measured by an Abbe refractometer. When the refractive index is less than 1.8, the pattern of the transparent conductor (channel region and non-channel region) is visually recognized, which may lower display quality.

The thickness of the first hard coat layer 20 may be 0.04 to 1 mu m, more preferably 0.05 to 0.08 mu m. It is possible to prevent or reduce an increase in haze of the transparent conductor in the above range, to improve the transmittance, and to prevent the problem of pattern visibility.

The transparent conductive film 30 used in the present invention is a conductive layer and may include conductivity and good flexibility and flexibility including a conductive network formed of metal nanowires. The transparent conductive film 30 can be formed by a patterning method such as etching and can be used in a flexible device by securing flexibility.

In an embodiment, the transparent conductive film 30 may comprise a matrix 34 and a conductive network of metal nanowires 32 impregnated in the matrix 34. The matrix 34 enhances adhesion and solvent resistance of the transparent conductive film 30 to the first hard coat layer 20 and prevents exposure of the metal nanowires to prevent oxidation. In one embodiment, the transparent conductive film comprises 13 to 23 wt.%, For example 15 to 20 wt.%, And 77 to 87 wt.%, E. G. 80 to 85 wt.% Metal nanowires 32 . In the above range, the conductive network of the metal nanowires can be formed to secure the conductivity, and the adhesion effect to the substrate layer can be expected.

The matrix 34 may comprise a cured composition of a composition comprising a binder and an initiator.

In one embodiment, the transparent conductive film 30 comprises a metal nanowire layer comprising a metal nanowire 32, a binder and a cured product of an initiator, and a cured product of a binder and an initiator formed on the metal nanowire layer And an overcoat layer. In this case, the transparent conductive film 30 may be formed by coating the first hard coat layer 20 with a composition for a metal nanowire layer including a metal nanowire 32, a solvent, a binder, and other additives such as a thickener, Drying a metal nanowire network coating layer (e.g., a wet thin film coating layer), and coating and curing a composition for the overcoat layer on the coating layer, including a binder, a solvent, and an initiator. The composition for the overcoat layer may fill the void space of the metal nanowire network when coated, and may be cured to form the matrix 34 of the transparent conductive film 30. Since the transparent conductive film 30 has an overcoat layer formed on the metal nanowire layer to prevent oxidation of the metal nanowire 32 and reduce the surface roughness of the metal nanowire layer, A predetermined laminate can be stably laminated. The metal nanowire layer and the overcoat layer may be integrally formed. The 'integrated type' may mean that the metal nanowire layer and the overcoat layer are not bonded to each other by an adhesive layer or the like and are not independently separated.

In another embodiment, the transparent conductive film 30 may comprise a metal nanowire 32, a metal nanowire layer comprising a binder and a cured product of an initiator. In this case, the transparent conductive film 30 may be formed by applying a composition for a transparent conductive film including a metal nanowire 32, a binder, an initiator, an additive (e.g., a thickener, a dispersant) Coating and curing the composition. Here, the remainder excluding the metal nanowires 32 can form the matrix 34. [

The metal nanowires 32 have better dispersibility than metal nanoparticles due to their nanowire shape. Further, the metal nanowire can provide the effect of significantly lowering the sheet resistance of the transparent conductive film due to the difference in particle shape to nanowire shape.

The metal nanowires 32 have the shape of a very fine line having a specific cross section. In an embodiment, the ratio (L / d) of the nanowire length L to the diameter d of the cross section of the metal nanowire 32 is in the range of 10 to 1,000, for example 500 to 1,000, 700. In this range, a high conductivity network can be realized even at a low nanowire density, and the sheet resistance can be lowered.

The metal nanowires 32 may have a cross-sectional diameter d of not less than 0 nm and not more than 100 nm, for example, 30 to 100 nm, specifically 60 to 100 nm. By ensuring high L / d in the above range, a transparent conductor having high conductivity and low sheet resistance can be realized.

The metal nanowires 32 may have a length L of 20 m or more, for example, 20 to 50 m. Within this range, a high L / d can be ensured to realize a conductive film having a low conductivity and a low sheet resistance.

The metal nanowires 32 may comprise nanowires made of any metal. For example, silver nanowires, copper nanowires, gold nanowires, mixtures thereof, and the like. For example, silver nanowires or mixtures containing them can be used.

The metal nanowires 32 may be manufactured by a conventional method or commercially available products may be used. For example, a metal salt such as silver nitrate (AgNO 3 ) may be reduced in the presence of a polyol and poly (vinyl pyrrolidone). Alternatively, a commercially available metal nanowire-containing solution (e.g., ClearOhm Ink. Of Cambrios) may be used.

The binder may be included in a composition for a metal nanowire layer, a composition for an overcoat layer, or a composition for a transparent conductive film to form the matrix 34. The binder may comprise one or more of a monomer, oligomer, having a curing functional group (e.g., (meth) acrylate group). In embodiments, the binder may comprise at least one of a urethane (meth) acrylate oligomer, a (meth) acrylate based monofunctional or polyfunctional monomer. The monofunctional or polyfunctional monomer may be a (meth) acrylic monomer having at least one functional group, for example, monofunctional to hexafunctional monomer, a linear or branched (meth) acrylate having an alkyl group having 1 to 20 carbon atoms, (Meth) acrylate having a carbon number of 1 to 20 having a hydroxyl group, a (meth) acrylate having a cycloaliphatic group having 3 to 20 carbon atoms, a polyfunctional (meth) acrylate of a polyhydric alcohol having a carbon number of 3 to 20, . Specific examples of the monofunctional or polyfunctional monomer include isobornyl (meth) acrylate, cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (Meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, tris (2-hydroxyethyl) isocyanate tri (Meth) acrylate, glycerol tri (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hexanediol di (meth) acrylate, dipentaerythritol penta Acrylate, dipentaerythritol hexa (meth) acrylate, and cyclodecanedimethanol di (meth) acrylate. But it is not limited to:

The initiator may use a photopolymerization initiator capable of absorbing an absorption wavelength of 150 to 500 nm to exhibit a photoreaction, without limitation. For example, the initiator may include a phosphine oxide series, an alpha-hydroxy ketone series, and the like. Specifically, it may include bis-acyl-phosphine oxide, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, 1-hydroxycyclohexyl phenyl ketone, or a mixture thereof.

The additive includes a thickener, a dispersant, and the like, and may be included in a solution containing metal nanowires for supplying and receiving metal nanowires.

The solvent may include a main solvent and a co-solvent. Water or acetone may be used as the main solvent, and an alcohol such as methanol may be used as an auxiliary solvent for compatibility of water and acetone.

In one embodiment, the transparent conductive film 30 is a cured product of a composition comprising 13 to 23% by weight of the metal nanowires, 75 to 85% by weight of the binder, and 1 to 3% by weight of the initiator on a solids basis have. In another embodiment, the transparent conductive film 30 comprises from 13 to 23% by weight of the metal nanowires on a solids basis, from 75 to 85% by weight of the sum of the binder and the additive, and from 1 to 3% by weight of the initiator . Within this range, there can be a process reduction effect with a single coating.

In an embodiment, the refractive index of the matrix 34 may be equal to or lower than the refractive index of the substrate layer 10 in the transparent conductive film 30. And should be lower than the refractive index of the first hard coating layer 20.

The transparent conductive film 30 may have a thickness of 10 nm to 1 μm, for example, 50 to 500 nm, specifically 100 to 200 nm. In this range, the shape of the conductive network can be well maintained, shock and corrosion of the metal nanowire can be prevented, and uniform conductive characteristics can be realized.

2 is a cross-sectional view (schematic view) of a transparent conductor according to another embodiment of the present invention. As shown in FIG. 2, the transparent conductor according to the present invention may further include second hard coating layers 40a and 40b on both sides of the base layer 10.

The second hard coat layer 40a or 40b used in the present invention is a coating layer which can prevent scratching, corrosion and shrinkage of the substrate layer 10, and a hard coat layer used for a conventional transparent conductor can be used.

In the embodiment, the second hard coating layer 40a or 40b may be formed of a UV curable binder resin such as an acryl-based polymer such as methyl methacrylate, an epoxy-based polymer, a fluorine-based polymer, or a styrene-based polymer; a polyurethane, (Silicon-acrylic), and the like. The hard coating composition for forming the second hard coat layer may include monomers, oligomers and initiators capable of forming the polymer (binder), and the like. For example, the composition is applied to the base film 10 by a bar coating method or a spin coating method, dried at 60 to 120 ° C for 1 to 30 minutes, purged with nitrogen, cm < 2 > or more, but is not limited thereto. Commercialized coating compositions may also be used.

The initiator may be any conventional photopolymerization initiator capable of exhibiting a photoreaction. For example, the initiator may include a phosphine oxide series, an alpha-hydroxy ketone series, and the like. Specifically, it may include bis-acyl-phosphine oxide, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, 1-hydroxycyclohexyl phenyl ketone, or a mixture thereof. The content of the initiator may be 0.1 to 10% by weight, based on the total hard coating composition, but is not limited thereto.

The thicknesses of the second hard coating layers 40a and 40b may independently be 1 to 50 μm, for example, 1 to 10 μm. The scratch, corrosion and shrinkage of the substrate layer can be prevented or reduced in the above range.

The transparent conductor of the present invention may have a haze change of 5% or less, preferably 3% or less, as measured by a haze meter after heat treatment (pattern forming process, etc.) at 120 to 160 ° C, preferably 130 to 150 ° C.

The optical display device according to the present invention is characterized by including the transparent conductor. For example, the optical display device may be an optical display device including a touch screen panel, a flexible display and the like, an electronic paper (E-paper), a solar cell, and the like, but is not limited thereto. Such an optical display device manufacturing method is well known to those having ordinary skill in the art to which the present invention belongs.

Hereinafter, the present invention will be described in more detail by way of examples, but these examples are for illustrative purposes only and should not be construed as limiting the present invention.

Example

Example  One

A composition for forming a first hard coating layer (manufactured by Toyo Ink, product name: TYT-80, solvent: PGME (trade name) manufactured by Teijin Dupont Co., Ltd., product name: KEL86W) was formed on a substrate layer (polyethylene terephthalate (solid content of poly ethylene glycol monoethyl ether: 1 wt%) was coated on the first hard coat layer and UV cured at 500 mJ / cm 2 or more to form a first hard coat layer having a thickness of 0.05 μm. Next, (Ag Nanowire) coating solution (manufactured by Cambrios, trade name: ClearOhm Ink, solvent: deionized water, solid content: 0.2 wt%) was spin coated using a spin coater and dried in an oven at 80 ° C for 3 minutes And dried at 140 ° C. for 2 minutes or longer to form a metal nanowire coating layer. Then, an overcoat layer composition (manufactured by Cambrios, product name: ClearOhm Overcoat, solvent: diacetone alcohol and isopropyl alcohol, Content: 0.65 %) Was applied using a spin coater, dried in an oven at 110 ° C for 3 minutes or more, cured with a UV curing machine (ultraviolet ray intensity: 500 mJ / cm 2 or more) An overcoat layer having a thickness of 0.13 mu m was formed to form a transparent conductor.

Example  2

A transparent conductor was formed in the same manner as in Example 1, except that a PET film (product name: 100CPB) of Kimoto Company in which a second hard coat layer was formed on both surfaces of the base layer was used instead of the base layer.

Comparative Example  One

1 wt% of an acrylic organic binder (product name: HX 902, manufactured by Kyoeisha Co., Ltd.), silica nanoparticles (manufactured by Renko, product name: SST650U), 0.9 wt% UV light curing initiator (manufactured by Ciba, Except that a coating layer (refractive index: 1.65) formed from a coating composition containing 0.1% by weight of an isobutyl ketone (trade name: I-184) and 98% by weight of an organic solvent (Methyl isobutyl ketone) Thereby forming a conductor.

Comparative Example  2

A transparent conductor was formed in the same manner as in Example 1, except that the first hard coat layer was not formed.

Property evaluation method

(1) The haze, the transmittance, the sheet resistance and the film shrinkage ratio of the transparent conductor prepared in Example 1-2 and Comparative Example 1-2 were measured with a haze meter (manufacturer: Nippon Denshoku, device name: NDH-2000) The haze (unit:%) and the transmittance (unit:%) were measured and the sheet resistance was measured with a sheet resistance meter (manufacturer: NAPSON, device name: EC-80P) based on the K7136 evaluation method. The percent shrinkage of the film (unit:%) was measured by changing the length of the A5 size sheet before and after the heat treatment. Here, the physical property measurement before the heat treatment was performed at room temperature, and the physical properties after the heat treatment were put in a convection oven for 20 minutes and then left at room temperature for 10 minutes. The measurement results are shown in Table 1 below.

(2) Evaluation of pattern visibility: A wet sheet was wet-etched with a 4.65-inch diamond pattern having a pattern gap of 30 mu m, and then a black sheet was laminated on the patterned surface. On the patterned surface (conductive film surface) And 1 mm thick soda lime glass were laminated, and then pattern visibility was evaluated visually under a fluorescent lamp and a three-wavelength lamp (pattern not visible: O, pattern visible: X).

Item Before heat treatment After heat treatment Variation Film Shrinkage (%) Example 1 Haze (%) 0.84 0.85 0.01 +0.2 Transmittance (%) 89.60 89.50 0.10 Sheet resistance (Ω / □) 70 71 2 Example 2 Haze (%) 0.91 0.93 0.02 -0.7 Transmittance (%) 90.63 90.59 0.04 Sheet resistance (Ω / □) 72 73 One Comparative Example 1 Haze (%) 1.29 3.89 2.6 +0.2 Transmittance (%) 90.13 90.13 0 Sheet resistance (Ω / □) 84 101 17 Comparative Example 2 Haze (%) 1.17 3.26 2.6 -1.8 Transmittance (%) 90.23 88.23 0 Sheet resistance (Ω / □) 71 91 17

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Fluorescent lamp O O X X Three wavelength O X X X

From the results of Tables 1 and 2, it can be seen that the transparent conductor of the present invention can prevent or reduce the haze increase even at a high temperature process, and can solve the problem of pattern visibility particularly under fluorescent lamps.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

A base layer;
A first hard coating layer formed on the base layer and having a refractive index of 1.8 or higher; And
And a transparent conductive film formed on the first hard coating layer.
The transparent conductive material as claimed in claim 1, wherein the base layer comprises at least one of polyester, polycarbonate, cycloolefin polymer, polysulfone, polyimide, silicone, polystyrene, polyacryl, and polyvinyl chloride sieve.
The transparent conductor according to claim 1, wherein the base layer comprises polyethylene terephthalate.
The transparent conductor according to claim 1, wherein the base layer has a thickness of 10 to 250 占 퐉.
The transparent conductor according to claim 1, wherein the first hard coating layer has a refractive index of 1.8 to 1.9.
The transparent conductor according to claim 1, wherein the first hard coating layer comprises a high hardness nanoparticle and a binder.
The transparent conductor according to claim 1, wherein the thickness of the first hard coat layer is 0.04 to 1 占 퐉.
The transparent conductor according to claim 1, wherein the transparent conductive film comprises a metal nanowire and an overcoat layer.
The transparent conductor according to claim 1, wherein the transparent conductive film has a thickness of 10 nm to 1 占 퐉.
The transparent conductor according to claim 1, wherein the transparent conductor further comprises a second hard coat layer on both sides of the base layer.
The transparent conductor according to claim 1, wherein the transparent conductor has a haze change of 5% or less after pattern formation at 120 to 160 ° C.
An optical display device comprising a transparent conductor according to any one of claims 1 to 11.
KR20130101337A 2013-08-26 2013-08-26 Transparent conductor and optical display apparatus comprising the same KR20150024184A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017074047A1 (en) * 2015-10-28 2017-05-04 덕산하이메탈(주) Light-transmissive substrate and manufacturing method therefor
WO2017074051A1 (en) * 2015-10-28 2017-05-04 덕산하이메탈(주) Light-transmissive substrate and manufacturing method therefor
KR20170116911A (en) * 2016-04-12 2017-10-20 삼성에스디아이 주식회사 Transparent conductor and display apparatus comprising the same
KR20180035570A (en) * 2016-09-29 2018-04-06 코오롱인더스트리 주식회사 Method of Producing Transparent Conductive Film

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017074047A1 (en) * 2015-10-28 2017-05-04 덕산하이메탈(주) Light-transmissive substrate and manufacturing method therefor
WO2017074051A1 (en) * 2015-10-28 2017-05-04 덕산하이메탈(주) Light-transmissive substrate and manufacturing method therefor
KR20170116911A (en) * 2016-04-12 2017-10-20 삼성에스디아이 주식회사 Transparent conductor and display apparatus comprising the same
KR20180035570A (en) * 2016-09-29 2018-04-06 코오롱인더스트리 주식회사 Method of Producing Transparent Conductive Film

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