CN102043184A - Integrated touch polarizer and touch panel comprising the same - Google Patents
Integrated touch polarizer and touch panel comprising the same Download PDFInfo
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- CN102043184A CN102043184A CN2010105040172A CN201010504017A CN102043184A CN 102043184 A CN102043184 A CN 102043184A CN 2010105040172 A CN2010105040172 A CN 2010105040172A CN 201010504017 A CN201010504017 A CN 201010504017A CN 102043184 A CN102043184 A CN 102043184A
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Abstract
The present invention provides an integrated touch polarizer and a capacitive touch panel comprising the same. The integrated touch polarizer comprises the following components: a first conductive film which is provided with a first conductive layer formed whereon; a first adhibition layer which is formed on the first conductive layer; and a polarizer which is set on the first adhibition layer.
Description
The cross reference of related application
The present invention requires the right of priority to the 10-2009-0096367 korean patent application of Korea S Department of Intellectual Property submission on October 9th, 2009, and incorporates its disclosed content into the application by reference at this.
Technical field
The present invention relates to a kind of integrated touch Polarizer and touch panel with this integrated touch Polarizer, particularly, the present invention relates to a kind of touch panel that has the integrated touch Polarizer of excellent optical property and outside visibility and have this integrated touch Polarizer.
Background technology
Generally, the capacitance touch panel has such structure: wherein Polarizer adheres to a surface of liquid crystal panel by using contact adhesive (PSA) layer, again the ITO deposited film is adhered thereto by use optically clear adhesive (OCA) layer, and again that glass substrate is adhered thereto.The structure of touch panel as depicted in figs. 1 and 2 in the prior art.
In having the touch panel of this spline structure, because a plurality of layer sticks on the upper strata of Polarizer, the optical property of liquid crystal panel is deterioration owing to the different of refractive index, reflectivity and transmissivity between each layer, especially outside visibility poor.
In addition, adhere to liquid crystal panel separately owing to comprise the touch panel of ITO deposited film and Polarizer, thereby its complex manufacturing.
Summary of the invention
An embodiment of the invention provide a kind of can provide excellent optical property and outside visibility, and can simplify touch panel preparation technology's integrated touch Polarizer and the touch panel with this integrated touch Polarizer.
According to an embodiment of the invention, it provides a kind of integrated touch Polarizer, comprising: first conducting film, and it has first conductive layer that forms thereon; First bonding coat, it is formed on described first conductive layer; And Polarizer, it is arranged on described first bonding coat.This Polarizer can have such structure: at least one lip-deep diaphragm that it comprises polaroid and is arranged at this polaroid perhaps has such structure: the polaroid coating that it comprises substrate and is provided with on the lower surface of this substrate.
The integrated touch Polarizer can further comprise second conducting film, and it has lip-deep second conductive layer between first bonding coat and polaroid disposed thereon.In the case, can on this second conductive layer, second bonding coat be set.The structure that comprises a conducting film is called as single layer structure, and comprises that the structure of two conducting films is called as double-decker.
According to another implementation of the invention, it provides a kind of capacitance touch panel, comprising: image display panel; The 3rd bonding coat, it is arranged on this image display panel; And according to the integrated touch Polarizer of aforementioned exemplary embodiment of the present invention, it is arranged on the 3rd bonding coat.
According to another implementation of the invention, it provides a kind of method for preparing the integrated touch Polarizer, comprising: preparation has first conducting film of first conductive layer that forms thereon; On described first conductive layer, form first bonding coat; And Polarizer adhered on described first bonding coat.Described method can further comprise: second conducting film that will have second conductive layer that forms thereon adheres on the upper surface of described first bonding coat; And on described second conductive layer, form second bonding coat.
According to another implementation of the invention, it provides a kind of method for preparing the capacitance touch panel, comprising: the preparation image display panel; On this image display panel, form the 3rd bonding coat; And will adhere on the 3rd bonding coat according to the integrated touch Polarizer of aforementioned exemplary embodiment of the present invention.
Description of drawings
Following detailed description in conjunction with the drawings will be expressly understood above-mentioned and other embodiments, characteristics and other advantages of the present invention more, wherein:
Fig. 1 and Fig. 2 demonstrate the structure according to the touch panel of prior art;
Fig. 3 to 6 demonstrates the structure of touch panel according to an illustrative embodiment of the invention; And
Fig. 7 demonstrates the structure according to the integrated touch Polarizer of an exemplary embodiment of the present invention.
Embodiment
With reference to accompanying drawing in detail illustrative embodiments of the present invention is described in detail.But the present invention can implement with many different forms, and the present invention should not be construed as limited to the embodiment of the following stated.On the contrary, it is in order to make the disclosure fully complete that these embodiments are provided, and fully passes on scope of the present invention to those skilled in the art.In the accompanying drawings, for clarity sake shape and size may be amplified, and will use identical Reference numeral to indicate identical or similar elements from start to finish.
An exemplary embodiment of the present invention provides a kind of integrated touch Polarizer, comprising: first conducting film, and it has first conductive layer that forms thereon; First bonding coat, it is formed on described first conductive layer; And Polarizer, it is arranged on described first bonding coat.Second conducting film with conductive layer can also be set between this first bonding coat and Polarizer in addition.In the case, can on this second conducting film, second bonding coat be set.
In addition, integrated touch Polarizer according to an illustrative embodiment of the invention can further be included in the 3rd bonding coat on the described first conducting film lower surface, and it is used to adhere to image display panel.
When the integrated touch Polarizer that adopts according to an illustrative embodiment of the invention, this integrated touch Polarizer only needs to be adhered to the image display panel last time, and do not need as independent Polarizer and the touch panel of adhering on image display panel in the prior art, so it can simplify the preparation technology of final products.
Under the situation of the capacitance touch panel that adheres to Polarizer top of prior art, the pattern of conductive layer is visible for the outside, and produces haze by touch panel, thus deterioration the screen display quality.Yet, comparatively speaking, in integrated touch Polarizer according to an illustrative embodiment of the invention, because conductive layer is present in the downside of Polarizer, therefore, owing to the existence of Polarizer makes conductive layer pattern invisible for the outside, and can significantly reduce the generation of haze.In addition, owing to compare Polarizer or substrate with conductive layer and be placed in the outermost layer angle, so can also improve the deterioration of the otherwise screen display quality that causes because of surface reflection with low surface reflectivity.
In addition, common capacitance touch panel only can be operated when user's finger and the distance between the conductive layer remain unchanged.Therefore,, on conductive layer, be provided with diaphragm or mute film (dummy film), caused the problem of the thickness increase of touch panel, caused the integral thickness of product to increase in order to keep this distance.Yet; comparatively speaking; in integrated touch Polarizer according to an illustrative embodiment of the invention; because this Polarizer is positioned on the conductive layer; can not need to use the distance between the finger that keeps conductive layer and user under the situation of this diaphragm or mute film constant, thereby can prepare thinner product.
When Polarizer and according to an illustrative embodiment of the invention touch panel were formed integrally as, it can be known as Polarizer (in-cell polarizing plate) in the box.
In an exemplary embodiment of the present invention; this Polarizer can have such structure: at least one lip-deep diaphragm that it comprises polaroid and is arranged at this polaroid perhaps has such structure: the polaroid coating that it comprises substrate and is provided with on the lower surface of this substrate.
According to first illustrative embodiments of the present invention, this integrated touch Polarizer comprises: first conducting film, and it has first conductive layer that forms thereon; First bonding coat, it is formed on described first conductive layer; And Polarizer, it is arranged on described first bonding coat.This Polarizer can comprise polaroid and be arranged on a lip-deep diaphragm on two surfaces of this polaroid.Second conducting film with second conductive layer that forms thereon can also be set between this first bonding coat and Polarizer in addition.In the case, can on this second conducting film, second bonding coat be set.
Fig. 7 demonstrates the example according to the integrated touch Polarizer of first illustrative embodiments of the present invention.Fig. 7 has shown double-decker, but the present invention is not limited to this.
In first illustrative embodiments of the present invention, first conducting film or second conducting film comprise substrate and are arranged on this suprabasil conductive layer.
The substrate of first or second conducting film can be a plastic foil.Substrate can be to have the zero zero-lag film that differs, or has the phase shift films that differs.When substrate has when differing, those skilled in the art can determine suitable phase difference according to its intended purposes.When this substrate is phase difference film, because phase shift films is positioned at the downside of Polarizer, thus can reduce the difference of surface reflectivity, thus the visibility of touch panel increased.Therefore, transmissivity of touch panel (or transparency) and optical property thereof may increase along with the decline of surface reflectivity.For example, can use the phase shift films of phase difference with 1/4 λ.The use of phase shift films with phase difference of 1/4 λ has produced circularly polarized light, has further reduced surface reflectivity, therefore can improve the optical property as the image display panel of liquid crystal panel or organic luminescent device panel.
Simultaneously, the conductive layer of first or second conducting film is used for touching to be used, and it can have pattern form.The pattern form of this conductive layer can be a rule or irregular.For example, the pattern form of conductive layer can be a grid configuration, but is not limited to this.This conductive layer can be formed by transparent conductive metal oxide skin(coating) (as the ITO layer).This conductive layer can form by deposition process, but is not limited to this.Conductive layer can be connected with printed circuit board (PCB) (PCB), preferably, is connected with flexible PCB.
Conductive layer can with polymkeric substance, carbon nano-tube (CNT) or as the metal of silver (Ag) form.
First bonding coat, second bonding coat and/or the 3rd bonding coat can be optically clear adhesive (OCA) layers.Preferably, the thickness of OCA layer can be between 5 microns to 50 microns, but the present invention is not limited to this.
Preferably, this transparent adhesive layer can not cause yellow or haze, and separates by preventing from the surface of substrate that adheres to transparent adhesive layer or glass substrate to produce, peels off and bubble and have permanance and reliability.Preferably, guaranteeing re-usability (that is, can remove and peelable performance) can take off after the element (as the glass surface of LCD panel) of touch panel is gone up so that transparent adhesive layer is adhered to.In order to ensure re-usability, can use to have the bonding agent of hydroxyl as crosslinking functionality, as long as and guaranteed re-usability, even can use and have strong fusible bonding agent with acrylic acid as crosslinking functionality to a great extent.
As can be again can comprising acrylic copolymer with the bonding agent of transparent OCA, and this acrylic copolymer can prepare by using the conventional soln polymerization.
Described bonding agent be storage modulus (G ') for below the 0.05MPa, be preferably the soft adhesive between the 0.01MPa to 0.03MPa.In the case, storage modulus is measured down at 80 degrees centigrade after bonding agent solidifies.Form on conductive layer in the process of bonding coat, if use conventional bonding agent (storage modulus is as more than the 0.5MPa), owing to produce the step of conductive layer pattern, bubble may produce between conductive layer and bonding coat, and deterioration touches performance.Therefore, the present inventor studies repeatedly, and is final definite, when forming bonding coat with the soft adhesive with the storage modulus below the 0.03MPa, can promptly reduce the bubble that produces between conductive layer and bonding coat.In addition, the use of soft adhesive has improved permanance and re-usability.
Preferably, bonding coat according to an illustrative embodiment of the invention further comprises antioxidant except bonding agent.For example, can use to be selected from benzotriazole, benzimidazole and the benzotriazole carboxylic acid one or more, but antioxidant is not limited to this as antioxidant.As mentioned above, bonding coat according to an illustrative embodiment of the invention can use and have hydroxyl (bonding agent OH) is to guarantee re-usability.Under most of situation, conventional bonding agent comprises carboxyl (COOH).Yet hydroxyl or carboxyl have the character of conductive oxide layer.When conductive layer is oxidized, thus the change in impedance value deterioration touch sensitivity (perhaps response speed), also possibly can't touch driving under the poorest situation.Therefore, in bonding coat, add antioxidant in the re-usability that keeps excellence, to prevent that conductive layer is oxidized.
In first illustrative embodiments, can use polaroid well known in the prior art and without limits as the polaroid of Polarizer.For example, can use by the film of the polyvinyl alcohol (PVA) that contains iodine or dichromatic dye (PVA) preparation polaroid as Polarizer.Polaroid can pass through to dye the PVA film with preparation with iodine or dichromatic dye, but there is no particular restriction to its preparation method.In this illustrative embodiments, polaroid is meant the situation of the polaroid that does not have diaphragm itself, and Polarizer is meant the situation that has comprised polaroid and diaphragm.
Preferably, use on thickness direction, differ be 0 or the film of negative value as the diaphragm of Polarizer, and use more preferably that to differ be 0 film.Can use tricel element (TAC) film; film by open loop syndiotaxy (ROMP) preparation based on polynorbornene; by HROMP (hydrogenation after the ring-opening metathesis polymerization) polymeric membrane that the ring-opening polymerization polymer hydrogenation based on cyclic olefin is obtained; polyester film, and by addition polymerization preparation based on the diaphragm as Polarizer such as the film of polynorbornene.In addition, can use polymkeric substance, as polyethylene terephthalate or Polyethylene Naphthalate based on polyester; Based on cellulosic polymkeric substance, as diacetyl cellulose or triacetyl cellulose; Acrylate copolymer is as polymethylmethacrylate; The polymkeric substance of styrene-based, as polystyrene or acrylonitritrile-styrene resin (AS resin), and based on the film of preparations such as the polymkeric substance of polycarbonate as diaphragm.In addition, can use based on polyolefin polymers; Polymkeric substance based on vinyl chloride; Based on the polymkeric substance of acid amides, as nylon or aromatic poly amide; Polymkeric substance based on vinyl alcohol; Polymkeric substance based on vinylidene chloride; Polymkeric substance based on polyvinyl butyral; Polymkeric substance based on alilate; Polymkeric substance based on polyoxymethylene; And based on the film of preparations such as the polymkeric substance of epoxide.In addition, can use and contain heat curing or the ultraviolet-curing resin film of (as based on acrylic acid resin, based on the resin of carbamate, based on the resin of propenoic methyl carbamate with based on the resin of silicon).In addition, can use the film of making by transparent polymer material as diaphragm, but the invention is not restricted to this.Preferably, use the TAC film as the diaphragm that is used for Polarizer.
Can adhere to polaroid and diaphragm by using bonding coat.Can use in the prior art any bonding agent as being used for the bonding agent of bonding diaphragm and Polarizer and being not particularly limited.For example, can use the bonding agent based on polyvinyl alcohol (PVA) (PVA) of single component or bi-component,, but the present invention is not limited to this based on the bonding agent of polyurethane, based on the bonding agent of epoxy, based on the bonding agent of styrene-butadiene rubber (SBR) or hot melt adhesive etc.
In these bonding agents, preferably can be based on the bonding agent of polyvinyl alcohol (PVA), especially contain the resin based on polyvinyl alcohol (PVA) of acetoacetyl, and preferably can use the bonding agent that contains based on the metallic compound crosslinking chemical of amine.The Polarizer bonding agent can comprise the resin based on polyvinyl alcohol (PVA) that contains acetoacetyl of 100 weight portions, and the metallic compound crosslinking chemical based on amine of 1 weight portion to 50 weight portion.
As long as based on the resin of polyvinyl alcohol (PVA) can make polaroid and diaphragm bonding fully, have excellent optical transparence and can As time goes on not cause variation, so to this just restriction especially of resin based on polyvinyl alcohol (PVA) as yellow; Yet, consider crosslinked smoothly with crosslinking chemical, the preferred resin that contains acetoacetyl that uses based on polyvinyl alcohol (PVA).
At this; as long as this resin based on polyvinyl alcohol (PVA) comprises acetoacetyl, then this degree of polymerization and saponification (DS) degree based on the resin of polyvinyl alcohol (PVA) just is not particularly limited, but preferably; its degree of polymerization is between 200～4000, and saponification (DS) degree is between 70～99.9mol%.According to the degree of freedom of molecular motion, consider and the flexible hybrid of holding material that more preferably, the described degree of polymerization is 1,500～2, between 500, and saponification (DS) degree is between 90～99.9mol%.The acetoacetyl that preferably should comprise in the case, 0.1～30mol% based on the resin of polyvinyl alcohol (PVA).Acetoacetyl is in above-mentioned scope the time, and the reaction of itself and crosslinking chemical can be carried out smoothly, and the water tolerance and the bounding force of expection bonding agent are enough gratifying.
Metallic compound crosslinking chemical based on amine is a kind of water cross-linking agent, its have can with the functional group based on the resin reaction of polyvinyl alcohol (PVA), and be preferably the form that comprises based on the metal complex of the part of amine.Available metal comprises transition metal, as zirconium (Zr), titanium (Ti), hafnium (Hf), tungsten (W), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd), platinum (Pt) etc., and, can use any part that comprises at least one or a plurality of amido (as primary amine, secondary amine (diamines), tertiary amine, ammonium hydroxide etc.) as the part that combines with central metal.Preferably, based on the resin based on polyvinyl alcohol (PVA) of 100 weight portions, its use amount can be adjusted between 1 weight portion to 50 weight portion.In the time of in above-mentioned scope, the expection bonding agent can have the bounding force that makes us enough satisfaction, and can improve the storage stability (or pot life) of bonding agent.
Preferably, will comprise being controlled at below 9 by use pH controlling agent of acetoacetyl based on the resin of polyvinyl alcohol (PVA) and the pH value that comprises based on the binder aqueous solution of the metallic compound crosslinking chemical of amine.More preferably, this pH value can be adjusted between 2～9, and more preferably, this pH value can be adjusted between 4～8.5.
For in conjunction with polaroid and diaphragm; at first; by using roll coater, intaglio printing coating machine, rod-type coating machine, knife type coater, kapillary coating machine etc. that bonding agent is coated to the surface of polarizing plate protective film or being coated on the PVA film as polaroid; then; before the bonding agent bone dry, with diaphragm and polaroid with bond roll (attachment roll) hot pressing or at room temperature compress.When using hot melt adhesive, should use the hot pressing roller.
When the bonding agent that uses based on polyurethane, preferred the bonding agent that adopts not yellowing under the illumination that uses based on polyurethane based on the compound of aliphatic isocyanates.Using single component or two dry component laminating adhesives or isocyanates and hydroxyl are being had under the situation of bonding agent of relatively low activity, can use by based on the solvent of acetic acid esters, based on the solvent of ketone, based on the solvent of ether or based on the solvent-based adhesive of the solvent dilution of aromatic radical.At this moment, the viscosity of bonding agent is preferably and is low to moderate below the 5000cps.Preferably, this bonding agent has the excellent pot life, and its transmittance in 400～800nm wavelength coverage is more than 90%.
As long as it can demonstrate enough bounding forces, can use any other bonding agent (for example, bonding agent (bonding agent), natural gum etc.).Preferably, such bonding agent fully solidifies to have physical strength high as above-mentioned bonding agent by heat or ultraviolet ray after bonding, and have enough strong interfacial adhesion power, unless so that a film is damaged, otherwise coming off of the film that adhered to by bonding agent can not taken place.
The example of available bonding agent can include the multipolymer, polyvinyl alkyl ether, polyacrylate of natural rubber with excellent optical clarity, ameripol, elastic body, vinyl chloride/vinyl acetate, based on the bonding agent of improved polyalkene etc., and durable bonding agent by obtaining to the hardening agent (or rigidizer) that wherein adds as isocyanates.
In first illustrative embodiments, substrate can be set in addition on Polarizer.In the case, other bonding coat can be set between this substrate and Polarizer.This substrate can be glass substrate or plastic base.Preferably, this other bonding coat is optically clear adhesive (OCA) layer.
According to second illustrative embodiments of the present invention, this integrated touch Polarizer can comprise: first conducting film, and it has the conductive layer that forms thereon; First bonding coat, it is arranged on this first conducting film; And Polarizer, on its setting and this first bonding coat, and this Polarizer comprises substrate and the polaroid coating that is arranged on the base lower surface.Second conducting film with conductive layer can be set between this first bonding coat and Polarizer in addition.In the case, can on this second conducting film, second bonding coat be set in addition.
When described Polarizer comprises the substrate with polaroid coating, compare with the Polarizer that comprises polaroid and diaphragm of routine, can not use layer as contact adhesive (PSA) layer etc., therefore can reduce the thickness of touch-screen.Particularly, conventional Polarizer has the thickness between 110 microns to 130 microns, but in second illustrative embodiments of the present invention, the thickness of polaroid coating can be reduced to several microns to tens microns scope.Therefore, can provide thinner touch panel according to an illustrative embodiment of the invention.
In second illustrative embodiments of the present invention, the polaroid coating of described Polarizer can form by applying the lyotropic liquid crystal coating composition.
Can use the solution that comprises dichromatic dye and solvent and demonstrate lyotropic liquid crystalline as the lyotropic liquid crystal coating composition.Below will be described in disclosed polaroid coating component among the US 2009/0027597 (its full content is incorporated this paper into), but in addition, can also use polaroid well known in the prior art to apply component.
Lyotropic liquid crystalline is meant the character that changes mutually that causes isotropy and liquid crystal phase by the concentration that changes temperature or dichromatic dye (solute).Described liquid crystal phase includes but not limited to: nematic liquid crystal phase, stratose liquid crystal phase, cholesteric liquid crystal equate.These liquid crystal phases can by polarized light microscope observing to the optics form of liquid crystal phase carry out detection and Identification.Solution can make the dichromatic dye orientation by having lyotropic liquid crystalline.
The dichromatic dye of Shi Yonging is the organic compound that absorbs the light of the specific wavelength between 400nm～780nm in an exemplary embodiment of the present invention embodiment.Described dichromatic dye be meant transistion moment on the long axis direction of dye molecule in the dyestuff than the transition on the short-axis direction of this dye molecule apart from strong, perhaps strong apart from than on its long axis direction of the transition on its short-axis direction.Can select a certain suitable dyestuff as dichromatic dye according to intended purposes, and preferably, this dichromatic dye be for demonstrating the organic compound (that is lyotropic liquid crystal) of lyotropic liquid crystalline under solution state.The dichromatic dye that at room temperature demonstrates the nematic liquid crystal phase in the solution state is particularly preferred, and this is because it has excellent arrangement performance (or orientation).
For example, dichromatic dye can comprise azo dyes, anthraquinone dye, perylene dyestuff, indanthrene dyes, imidazoles dyestuff, indigoid dye,
Piperazine dyestuff, phthalocyanine dye, kiton colors, pyrazolone dye, stilbene dye, diphenylmethane dyes, naphthoquinone dyestuff, merocyanine dye (metocyanine dyes), quinophthalone dyestuff (quinophthalone dyes), xanthene dye, alizarin dyes, acridine dye, quinoneimine dye, thiazole dye, methine dyes, nitro dye, nitrosol dyestuff etc.Wherein, azo dyes, anthraquinone dye, perylene dyestuff, indanthrene dyes, imidazoles dyestuff are preferred.These dichromatic dyes can use separately or can use its two or more potpourri.In the exemplary embodiment, in order to obtain black light polarizing film, a plurality of dichromatic dyes that preferably will have different absorption spectrums separately mix to use.
Preferably, described dichromatic dye is for comprising sulfonyl (SO
3H), carboxyl (COOH) or amino (NH
2,-NHR ,-NR
2) organic compound and their salt in a kind of, particularly preferably, this dichromatic dye is to comprise a kind of in the organic compound of sulfonyl and the salt thereof.The introducing sulfonyl has improved the solubleness for water effectively in dichromatic dye.Along with the increase of introducing the sulfonyl number in the dichromatic dye, the solubleness of water also is improved.The number of sulfonyl can suitably be selected, thereby solubleness and the water tolerance for solvent can be taken into account after light polarizing film forms.
In addition, also can use the dichromatic dye of selling on the market.Commercially available dichromatic dye can comprise C.I.Direct B67, DSCG (INTAL), RU31.156, methyl orange, AH6556, Sirius Supra BrownRLL, benzopurpurin, tetracarboxylic CuPc, acid red 266, cyanine dye, violet 20, perylene diimides (Perylenebiscarboximide), benzopurpurine 4B, methylene blue (alkali blue) 9, bright orange, acid red 18, acid red 27 etc.
The solvent that uses in described illustrative embodiments is used to dissolve dichromatic dye and shows lyotropic liquid crystalline.Can select a certain suitable solvent as solvent.For example, described solvent can be an inorganic solvent, as water etc.; Or organic solvent, as alcohols, ketone, ethers, ester class, aliphatics and aromatic hydrocarbon, halogenated hydrocarbons, amide-type, cellosolve etc.For example, described solvent can be normal butyl alcohol, 2-butanols, cyclohexanol, isopropyl alcohol, the tert-butyl alcohol, glycerine, ethylene glycol, acetone, butanone, methyl isobutyl ketone, cyclohexanone, cyclopentanone, 2 pentanone, methyl-n-butyl ketone, ether, tetrahydrofuran, two
Alkane, methyl phenyl ethers anisole, ethyl acetate, butyl acetate, methyl lactate, normal hexane, benzene,toluene,xylene, chloroform, methylene chloride, ethylene dichloride, dimethyl formamide, dimethyl acetamide, methyl cellosolve, ethyl cellosolve, or the like.These solvents can use separately or use with the potpourri of two kinds or above they.Solvent particularly preferably is a water.Electrical conductivity of water is preferably below the 20 μ S/cm, 0.001 μ S/cm to 10 μ S/cm more preferably, and be more preferably 0.001 μ S/cm to 5 μ S/cm.The lower limit of electrical conductivity of water is 0 μ S/cm.
The concentration of coating composition is preferably 5wt% to 40wt%, more preferably 5wt% to 35wt% and be preferably 5wt% to 30wt% especially.Solution with the concentration in above-mentioned scope can demonstrate stable liquid crystal state.
Preferably, coating composition can have the following conductivity (being scaled 0.05wt%) of 50 μ S/cm.Conductivity indication electricity is meant that by the difficulty of material the cross-sectional area between opposed facing electrode is 1cm
2And distance is led for the electricity of the material of 1cm.Along with conductivity value diminishes, liquid allows electricity just difficult more by it.The conductivity of the concentration that " is scaled 0.05wt% " and is meant the solution that in this illustrative embodiments, uses during as 0.05wt%.For example, the conductivity that is scaled 0.05wt% be concentration be 1/20 and the concentration of conductivity value of the liquid of 1wt% be 0.5wt% liquid conductivity value 1/10.
The conductivity of the solution that uses in this illustrative embodiments (being scaled 0.05wt%) is below the 50 μ S/cm, is preferably below the 40 μ S/cm, and more preferably below the 30 μ S/cm.The conductivity of the solution that most preferably, uses in this illustrative embodiments is 20 μ S/cm.But as an implementation value, the lower limit of conductivity is 0.1 μ S/cm.
Described coating composition can further comprise some suitable adjuvant.For example, adjuvant can comprise surfactant, plastifier, thermal stabilizer, light stabilizer, lubricant, antioxidant, ultraviolet light absorber, fire retardant, coloured material or colorant, antistatic agent, bulking agent, crosslinking chemical, thickening agent etc.Based on 100 parts by weight solution, described content of additive is preferably 0 weight portion to 10 weight portion.
Described coating composition can further comprise surfactant.Surfactant can be used to improve wetting state and the paintability of dichromatic dye for substrate surface.This surfactant is preferably non-ionic surfactant.Based on 100 parts by weight solution, the content of surfactant is preferably 0 weight portion to 5 weight portion.
Can use glass substrate, quartz base plate, polymer film, plastic base etc. as substrate, and preferably use glass substrate or polymer film.Can select appropriate resin to form polymer film.Preferably, described polymer film comprises thermoplastic resin.Described thermoplastic resin can comprise based on polyolefinic resin, resin based on cycloolefin, Corvic, based on cellulosic resin, the resin of styrene-based, polymethylmethacrylate, polyvinyl acetate, the polyvinylidene chloride resin is based on the resin of polyamide, resin based on polyacetal, based on the resin of polycarbonate, based on the resin of polybutylene terephthalate, based on the resin of polyethylene terephthalate, polysulfones (polysulfonic) resin, polyethersulfone (polyethersolfonic) resin is based on the resin of polyetheretherketone, based on the resin of polyarylate, based on the resin of polyamidoimide (polyamideimide-based), based on resin of polyimide etc.Described thermoplastic resin can use separately or mix use with its two or more potpourris.Can carry out suitable polymer modification to this thermoplastic resin, and then use.For example, described polymer modification can be the modification as polymerization, crosslinked, molecule end-blocking (molecular terminal), stereoregularity etc.
When using polymer film, the preferred polymer film that uses with excellent visible light transmittance and excellent transparency.The visible light transmittance rate of polymer film is preferably more than 80%, and more preferably more than 90%.When using polymer film as substrate, this substrate can be used as the diaphragm of light polarizing film after light polarizing film forms.Preferably, the substrate of using in this illustrative embodiments can be the polymer film that comprises based on cellulosic resin, this be because its have excellent wetting state and allowing to dichromatic dye obtain having high bitintability than and hang down the light polarizing film of variation in thickness.Preferably, described can be by part or all cellulose organic ester or the cellulose mixed organic acid ester that obtains with acetyl group, propiono and/or bytyry replacement with the cellulose hydroxyl based on cellulosic resin.For example, described cellulose organic ester can be cellulose acetate, cellulose propionate, cellulose butyrate etc.
Can use commercially available polymer film as the substrate of in this illustrative embodiments, using.Perhaps, can use by stretching and/or shrinking the film that the secondary processing of commercially available polymkeric substance obtains.For example, commercially available comprise based on the polymer film of cellulosic resin can be FUJIFILM Fuji Tech series (trade name: ZRF80S, TD80UF, TDY-80UL), Konica Minolta Opt.Inc. " KC8UX2M " etc.
Preferably before forming, the polaroid coating makes the substrate hydrophiling.Carry out hydrophiling technology (or water wettability processing) with carry out comparing before the hydrophiling technology contact angle that under 23 degrees centigrade, makes it with water and reduce by 10%.Preferably, carry out hydrophiling technology to obtain in 5 ° to 60 ° scopes and contact angle water under 23 degrees centigrade.Hydrophiling technology may be drying process, wetting technology, also may be that corona treatment, plasma treatment, alkali treatment or anchor coating agent (anchor coating) are handled.
The polaroid coating can form by apply above-mentioned coating composition on substrate.For example, may be more than 100 mm/second, preferably under 500 mm/second to 8000 mm/second, more preferably under 800 mm/second to 6000 mm/second, and most preferably under the coating speed under 1000 mm/second to 4000 mm/second, on substrate, apply and the dry coating composition to obtain the polaroid coating.Usually, preparing in the process of blooming the low homogeneity of filming of coating speed with increase by the solvent cast method.
Can adopt the painting method that uses suitable coating machine as applying coating method for compositions on substrate surface.For example, described coating machine can comprise: reverse roll coater (reverse roll coater) (RRC), positive transfer roller coating machine (forward rotating roll coater), the intaglio plate coating machine, knife type coater (knife coater), rod-type coating machine (rod coater), slit dye-coating machine (slot dye coater), gap nozzle formula coating machine (slot orifice coater), curtain coater (curtain coater), spray formula coating machine (fountain coater), Kohler coater (air doctor coater), kiss coater (kisscoater), dip coaterd (deep coater), bead coater (bead coater), knife type coater (blade coater), curtain coating coating machine (cast coater), flush coater, spin coater, extrusion coater, hot-melt adhesive applicator etc.Preferably, described coating machine can be reverse roll coater (RRC), positive transfer roller coating machine, intaglio plate coating machine, rod-type coating machine, slot type dye-coating machine, slot type curtain coating coating machine, curtain coater and spray formula coating machine.
The dry coating method for compositions is not particularly limited.For example, can use hot-air and cold air round-robin air circulation type freeze-day with constant temperature baking oven therein, use the well heater of microwave, far infrared radiation etc., as the drying device of thermoregulator warm-up mill, heat pipe roller or metal tape.
Preferably, coating composition is by being heated up with drying to high-temperature gradient by low temperature.Baking temperature can be preferably 10 degrees centigrade to 80 degrees centigrade, and more preferably 20 degrees centigrade to 60 degrees centigrade.Can suitably select the time of dry coating composition according to the type of solvent of baking temperature and use.
In second illustrative embodiments of the present invention, about the content of first or second conducting film and first or second bonding coat with in first illustrative embodiments of the present invention, describe identical.
Fig. 3 to Fig. 6 demonstrates the structure according to the touch panel of second illustrative embodiments of the present invention; And
Fig. 3 demonstrates single laminate-type structure, and wherein, the zero-lag film is used as the substrate of conducting film.Fig. 4 demonstrates two-fold layer structure, and wherein, the zero-lag film is used as the substrate of conducting film.Fig. 5 demonstrates single laminate-type structure, and wherein, the phase shift films with phase difference of 1/4 λ is used as the substrate of conducting film.Fig. 6 demonstrates two-fold layer structure, and wherein, the phase shift films with phase difference of 1/4 λ is used as the substrate of conducting film.
Illustrative embodiments of the present invention also provides a kind of capacitance touch panel, comprising: image display panel; The 3rd bonding coat, it is arranged on this image display panel; And the integrated touch Polarizer, it is arranged on the 3rd bonding coat.
Described image display panel can be liquid crystal panel or organic LED panel.
Preferably, the 3rd bonding coat that is arranged on the image display panel is optically clear adhesive (OCA) layer.In addition, preferably, bonding coat can have peelable or removeability can be to provide excellent re-usability.Preferably, the thickness of bonding coat may be between 5 microns to 50 microns, but the present invention is not limited to this.
The surface reflectivity of integrated touch Polarizer is below 5%.This is that 8% to 13% prior art touch panel is quite low with respect to surface reflectivity.
An exemplary embodiment of the present invention provides a kind of method for preparing the integrated touch Polarizer, and this method comprises: preparation has first conducting film of first conductive layer that forms thereon; On described first conductive layer, form first bonding coat; And Polarizer adhered on described first bonding coat.
Can use Polarizer with this spline structure: at least one lip-deep diaphragm that it comprises polaroid and is arranged at this polaroid, or this Polarizer can be prepared as follows: forms composition by on substrate, applying polaroid, forms coating thus.
Described method can further comprise: second conducting film that will have second conductive layer that forms thereon adheres on the upper surface of described first bonding coat; And on described second conductive layer, form second bonding coat.
An exemplary embodiment of the present invention provides a kind of method for preparing the capacitance touch panel, and this method comprises: the preparation image display panel; On this image display panel, form the 3rd bonding coat; And the integrated touch Polarizer of inciting somebody to action according to an illustrative embodiment of the invention adheres on the 3rd bonding coat.
Each element in preparation integrated touch Polarizer and touch panel is as indicated above.
As indicated above, according to an illustrative embodiment of the invention,, to compare with the prior art that wherein many rhythmo structure is adhered on the Polarizer because Polarizer is positioned at the top of conducting film, optical property and outside visibility are improved.In addition, because Polarizer and touch panel are integrally formed, thus can only the integrated touch Polarizer be adhered to image display panel, rather than Polarizer and touch panel are adhered to image display panel separately, thus preparation technology simplified.
Although the present invention shows in conjunction with illustrative embodiments and describes, but, to one skilled in the art, obviously under the situation of the spirit and scope of the invention that in not breaking away from, define, can carry out variations and modifications as claims.
Claims (20)
1. integrated touch Polarizer, it comprises:
First conducting film, it has first conductive layer that forms thereon;
First bonding coat, it is formed on described first conductive layer; And
Polarizer, it is arranged on described first bonding coat.
2. integrated touch Polarizer according to claim 1, wherein, described Polarizer has such structure: at least one lip-deep diaphragm that it comprises polaroid and is arranged at described polaroid.
3. integrated touch Polarizer according to claim 1, wherein, described Polarizer has such structure: the polaroid coating that it comprises substrate and is provided with on the lower surface of described substrate.
4. integrated touch Polarizer according to claim 1, wherein, described first conducting film comprises substrate and is arranged at this suprabasil first conductive layer.
5. integrated touch Polarizer according to claim 4, wherein, the substrate of described first conducting film is the phase difference film of zero-lag film or the phase difference with 1/4 λ.
6. integrated touch Polarizer according to claim 4, wherein, described conductive layer is figuratum ITO layer.
7. integrated touch Polarizer according to claim 1, wherein, described first bonding coat is optically clear adhesive (OCA) layer.
8. integrated touch Polarizer according to claim 7, wherein, described first bonding coat comprises the bonding agent with the storage modulus in 0.01MPa to the 0.03MPa scope.
9. integrated touch Polarizer according to claim 7, wherein, described first bonding coat further comprises antioxidant.
10. integrated touch Polarizer according to claim 1, it further comprises: second conducting film, it has second conductive layer that is provided with thereon; And second bonding coat, it is arranged on second conductive layer between described first bonding coat and the Polarizer.
11. integrated touch Polarizer according to claim 10, wherein, described second bonding coat is the OCA layer.
12. integrated touch Polarizer according to claim 11, wherein, described second bonding coat comprises the bonding agent with the storage modulus in 0.01MPa to the 0.03MPa scope.
13. integrated touch Polarizer according to claim 11, wherein, described second bonding coat further comprises antioxidant.
14. integrated touch Polarizer according to claim 1, wherein, surface reflectivity is below 5%.
15. a capacitance touch panel, it comprises:
Image display panel;
The 3rd bonding coat, it is arranged on the described image display panel; And
According to claim 1 each described integrated touch Polarizer to the claim 14, it is arranged on the 3rd bonding coat.
16. a method for preparing the integrated touch Polarizer, this method comprises:
Preparation has first conducting film of first conductive layer that forms thereon;
On described first conductive layer, form first bonding coat; And
Polarizer is adhered on described first bonding coat.
17. method according to claim 16, wherein, described Polarizer has such structure: at least one lip-deep diaphragm that it comprises polaroid and is arranged at described polaroid.
18. method according to claim 16, wherein, described Polarizer has such structure: the polaroid coating that it comprises substrate and is provided with on the lower surface of described substrate.
19. method according to claim 16, it further comprises:
Second conducting film that will have second conductive layer that forms thereon adheres on the upper surface of described first bonding coat; And
On described second conductive layer, form second bonding coat.
20. a method for preparing the capacitance touch panel, this method comprises:
The preparation image display panel;
On this image display panel, form the 3rd bonding coat; And
To adhere on the 3rd bonding coat according to claim 1 each described integrated touch Polarizer to the claim 14.
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| KR20090096367 | 2009-10-09 | ||
| KR10-2009-0096367 | 2009-10-09 | ||
| KR1020100090530A KR101309598B1 (en) | 2009-10-09 | 2010-09-15 | Integrated touch polarizer and touch panel comprising the same |
| KR10-2010-0090530 | 2010-09-15 |
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| CN102043184A true CN102043184A (en) | 2011-05-04 |
| CN102043184B CN102043184B (en) | 2013-10-09 |
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| CN105866872A (en) * | 2015-02-11 | 2016-08-17 | 东友精细化工有限公司 | Highly durable polarizing plate and display device comprising the same |
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