WO2004070605A1 - 透明積層体、ペン入力画像表示装置および画像表示方法 - Google Patents
透明積層体、ペン入力画像表示装置および画像表示方法 Download PDFInfo
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- WO2004070605A1 WO2004070605A1 PCT/JP2004/001201 JP2004001201W WO2004070605A1 WO 2004070605 A1 WO2004070605 A1 WO 2004070605A1 JP 2004001201 W JP2004001201 W JP 2004001201W WO 2004070605 A1 WO2004070605 A1 WO 2004070605A1
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- transparent
- layer
- pen
- film
- image display
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Classifications
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
-
- 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/039—Accessories therefor, e.g. mouse pads
- G06F3/0393—Accessories for touch pads or touch screens, e.g. mechanical guides added to touch screens for drawing straight lines, hard keys overlaying touch screens or touch pads
-
- 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
-
- 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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
-
- 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
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
Definitions
- the present invention relates to a touch panel for pen input attached to the front of an FDP display device such as a liquid crystal display, and more particularly, to a transparent laminate attached to a touch panel type electromagnetic induction type or resistive film type pen input image display device.
- the present invention relates to a body, a pen input image display device using the same, and an image display method. Background technology>
- a pen input image display device such as a resistive film type or electromagnetic induction type pen input liquid crystal display is already publicly known and used, and is also known as a patent document. Gazette).
- a tablet PC known as this type of display has an anti-reflection layer (or anti-glare layer) as shown in Fig. 6 for slidability by pen input and prevention of liquid crystal screen bleeding by pen input.
- a protective plate 43 composed of an acrylic plate or the like in which a hard coat film 41 is bonded to one or both sides via an adhesive layer 42 is provided on the visual side (pen input side) of the liquid crystal panel 44.
- the panel 44 is attached via an air layer 45 having a gap of about 0.5 to 2 mm.
- the present invention provides a pen-input image display device using a resistive film method or an electromagnetic induction method, which can maintain the slidability of an input pen, reduce image bleeding due to pen input, and improve the image quality.
- a panel sticking member that has an excellent writing feel, is lightweight and thin, is effective in preventing double reflection of external light, preventing image blurring, and preventing image display panels from cracking due to impact.
- Another object of the present invention is to provide a video input image display device and an image display method using the above-mentioned panel sticking member.
- a transparent relaxation layer having a specific thickness with a surface treatment layer, a transparent rigid layer, and the like.
- a transparent laminate in which the layers are laminated in this order and pasting it directly to the visual surface side (pin input side) of the image display panel with the transparent relaxation layer inside, the slidability of the input pen can be maintained.
- it has good writing quality, is lightweight and thin, prevents double reflection of external light, prevents image blurring, and has a special effect on image display panels caused by impact.
- the present invention relates to a transparent laminate for a pen-input image display device, wherein the transparent laminate includes a surface treatment layer, a transparent rigid layer, and a transparent relaxation layer having a thickness of 0.2 to 2 mm. It concerns the body.
- the transparent relaxation layer It is preferable to form the transparent relaxation layer with an adhesive. Further, it is preferred dynamic storage modulus at 2 0 ° C of the transparent rigid layer G 'is 2 X 1 0 8 P a higher dynamic storage elastic modulus at 2 0 ° C of the transparent relaxation layer G 'is is preferably not more than 1 X 1 0 7 P a. Also, it is preferable that the thickness of the transparent rigid layer be 0.15 to 2 mm. Good. It is possible to provide a pair of transparent conductive films facing each other at a predetermined interval in any part between the surface treatment layer and the transparent relaxation layer.
- the present invention relates to a pen input image display device in which the transparent laminate is directly attached to a visual surface side (pen input side) of an image display panel with its transparent relaxation layer inside.
- the input pen when the input pen is brought into contact with the surface with a load of 300 g from the surface, it sinks to a depth of 20 to 100 ⁇ and returns to its original state when the load is removed. It is possible to provide a pen input image display device having the above configuration.
- the present invention relates to a pen input image display method in which the transparent laminate is directly attached to the visual surface side (pen input side) of an image display panel with its transparent relaxation layer inside, and pen input is performed.
- the input pen when the input pen is brought into contact with the surface with a load of 300 g from the surface, it sinks to a depth of 20 to 100 ⁇ m and returns to its original state when the load is removed. It is possible to provide a pen-input image display method having the above-mentioned configuration and having the above configuration.
- the surface treatment layer, the transparent rigid layer, and the transparent relaxation layer are laminated in this order to form a transparent laminate, which is provided on the visual side of the image display panel through an appropriate optical film or the like. Because there is no gap in the air layer unlike the conventional protective plate, there is no parallax and there is no image blur to prevent glare, and there is no protective plate.
- the structure is simple, the cost can be reduced, and as a function, the blur of the image due to pen input can be reduced, and the image display panel can be prevented from cracking due to external impact while ensuring the writing quality. And various other effects.
- FIG. 1 is a cross-sectional view showing an example of the transparent laminate of the present invention and an electromagnetic induction type pen input liquid crystal display device using the same.
- FIG. 2 shows a transparent laminate of the present invention and an electromagnetic induction pen input liquid using the same. It is sectional drawing which shows the other example of a crystal display device.
- FIG. 3 is a cross-sectional view illustrating an example of the transparent laminate of the present invention and a resistive film type pen-input liquid crystal display device using the same.
- FIG. 4 is a cross-sectional view showing another example of the transparent laminate of the present invention and a resistive film type pen-input liquid crystal display device using the same.
- FIG. 5 is a cross-sectional view showing still another example of the transparent laminate of the present invention and an electromagnetic induction type pen input liquid crystal display device using the same.
- FIG. 6 is a cross-sectional view showing an example of a conventional pen input liquid crystal display device.
- FIG. 1 shows an example of the transparent skin of the present invention and an electromagnetic induction type pen input image display device using the same.
- reference numeral 1 denotes a transparent laminate, and a surface-treated film 1 OA having at least one of an anti-reflection layer, an anti-glare layer and a hard coat treatment layer is used as the transparent adhesive layer 1 OB.
- a transparent relaxation layer 12 is laminated on the transparent rigid layer 11 via the transparent rigid layer 11, and the transparent relaxation layer 12 is placed inside the transparent rigid layer 11. It is attached to the visual side of the liquid crystal panel 2 — (pen input side) via the optical film 3.
- the optical film 3 has a configuration in which a polarizing plate 30 as an optical layer and a retardation (optical compensation) plate 31 are laminated with a transparent adhesive layer 32 interposed therebetween, with the retardation plate 31 inside.
- the transparent adhesive layer 4 A is attached to the visual side (pen input side) of the liquid crystal panel 2.
- the optical film 3 is attached to the back side of the liquid crystal panel 2, that is, the side opposite to the visual side, by the transparent pressure-sensitive adhesive layer 4 B, also with the retardation plate 31 inside. I have.
- the surface-treated film 1OA as a surface-treated layer is desirably formed by subjecting a transparent film such as a polyester film to a hard coat treatment capable of withstanding the sliding property of pen input.
- a transparent film such as a polyester film
- a hard coat treatment capable of withstanding the sliding property of pen input.
- Two It is preferably at least H, more preferably at least 3H. If the hardness is less than 2 H, scratch resistance to the pen is insufficient.
- the dynamic friction coefficient with respect to the pen input is 0.02 to 0.30. If the coefficient of kinetic friction is too small, the pen will slide too much, and if it is too large, slippage will be poor and the pen will be heavy and writing will be poor.
- Such a hard coat treatment can be performed by a conventionally known method.
- a method of forming a cured film using an ultraviolet or electron beam curable resin or a thermosetting resin such as an unsaturated polyester resin, an unsaturated acrylic resin, an unsaturated polyurethane, a poamide resin, etc. I can do it.
- the surface-treated film 1OA preferably has an antireflection layer or an antireflection layer for the purpose of preventing reflection of external light.
- the antireflection layer can be formed by performing a conventionally known antireflection treatment. At that time, an antistatic treatment for preventing dust, an antifouling treatment for preventing fingerprints from adhering, and an appropriate treatment for imparting lubricity may be simultaneously performed. Further, the antireflection layer and the reflection preventing layer may be formed simultaneously.
- the reflection preventing layer is formed as a so-called anti-glare layer, for the purpose of preventing external light from being reflected and obstructing the visibility of the light transmitted through the polarizing plate.
- it can be formed by giving a fine uneven structure to the film surface by a roughening method such as sand plasting or embossing, or a method of blending transparent fine particles.
- the above transparent fine particles include silica, alumina, titania, zirconia, tin oxide, indium oxide, cadmium oxide, antimony oxide, and polymer beads such as polystyrene beads having an average particle size of 0.5 to 50 ⁇ .
- Inorganic or organic fine particles are used.
- the amount of the transparent fine particles to be used is generally 2 to 50 parts by weight, preferably 5 to 25 parts by weight, per 100 parts by weight of the resin for forming the uneven structure. Even if it also functions as a diffusion layer (such as a visual enlarging function) for diffusing the light transmitted through the polarizing plate and enlarging the vision etc. Good.
- the transparent pressure-sensitive adhesive layer 10B for laminating such a surface-treated film 10A on the transparent rigid layer 11 is not particularly limited, and a transparent acrylic-based or rubber-based transparent adhesive layer may be used. Pressure-sensitive adhesives can be widely used.
- the surface-treated film 10A in place of the use of the surface-treated film 10A, at least one of an anti-reflection layer, an anti-glare layer, and a hard coat-treated layer is used for the transparent rigid layer 11. It is also possible to directly form the surface treatment layer 10 composed of the above-mentioned layer, and to omit the use of the transparent pressure-sensitive adhesive layer 1 OB. Even in this case, it is desirable that the surface treatment layer 10 be configured to also serve as an anti-reflection layer (or anti-glare layer) and a hard coat treatment layer. 2, the components other than the above are the same as those in FIG. 1, and are denoted by the same reference numerals as those in FIG. 1, and the description thereof will be omitted.
- the transparent rigid layer 11 is used to reduce the pressing force by pen input and reduce image bleeding.
- the thickness of the transparent rigid layer 11 is 0.15 to 2 mm, preferably 0.2 to L mm.
- a plastic film having excellent transparency (transmittance of 70% or more), excellent mechanical strength, and excellent heat resistance is used.
- polyester resin, (meth) acrylic resin, polycarbonate resin, polyethylene naphthalate resin, polyethylene terephthalate resin, triacetyl cellulose, arton resin, epoxy resin, polyimide resin, polyetherimide resin, polyamide Films made of resin, polysulfone, polyolefin sulfide, polyethersulfone, etc. are used.
- This film may be a single layer or a composite layer of two or more layers. From the viewpoint of transparency, heat resistance and mechanical strength, a film composed of a single layer of polyester resin or epoxy resin or a composite layer of two or more of these is most preferred.
- polyester resin examples include polyethylene terephthalate and polyethylene naphthalate.
- Epoxy resins include, for example, bisphenol A type, bisphenol F type, bisphenol S type, novolak type such as bisphenol type such as hydrogenated product thereof, phenol nopolak type, cresol nopolak type, and triglycidyl isoform.
- Nitrogen-containing ring types such as cyanurate type and hydantoin type, aromatic types such as alicyclic type, aliphatic type and naphthalene type, low water absorption types such as glycidyl ether type and biphenyl 'type, dicyclo type and ester type And ether ester types, and modified versions thereof.
- These epoxy resins may be used alone or in combination of two or more. From the viewpoint of preventing discoloration, bisphenol A type, alicyclic type, triglycidyl isocyanurate type and the like are particularly preferable.
- epoxy resins preferably have an epoxy equivalent of 100 to 10,000 and a softening point of 120 ° C. or less, depending on the flexibility and strength of the film.
- a two-liquid mixed type that shows a liquid state at or below the temperature at the time of coating, particularly at room temperature, is preferable.
- an antioxidant a denaturant, a surfactant, a dye, a pigment, a discoloration inhibitor, and an ultraviolet ray, which are conventionally used, may be used.
- Various known additives such as an absorbent may be blended.
- curing agent there is no particular limitation on the curing agent, and one or more curing agents appropriate for the type of epoxy resin can be used.
- organic acid compounds such as tetrahydrophthalic acid, methyltetrahydrophthalic acid, hexahydrophthalic acid, and methylhexahydrophthalic acid, ethylenediamine, propylenediamine, diethylenetriamine, trie Amine compounds such as Cirente tramine, their amine adducts, metaphenylenediamine, diaminodiphenylmethane, diaminodiphenyl sulfone, amide compounds such as dicyandiamide and polyamide, and hydrazides such as dihydrazide Compounds, Methylimidazole, 2-Ethyl-1-41 Methylimidazole, Ethylimidazole, Isopropylimidazole, 2,4-Dimethinoleimidazonole, Phenoinoleimidazonole, Pendecinoleimidazonole, Heptadeshinoremidazoleno2 Imidazo
- phthalic anhydride maleic anhydride, anhydrous trimellitic acid, pyromellitic anhydride, nadic anhydride, dtaltalic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride
- Anhydride hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, methyl nadic anhydride, dodecenyl succinic anhydride, dichlorosuccinic anhydride, benzophenone tetracarboxylic anhydride, chlorendic anhydride, etc.
- An acid anhydride compound is also preferably used.
- colorless or pale yellow acids having a molecular weight of about 140 to 200, such as phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, and methylhexahydrophthalic anhydride.
- Anhydride-based curing agents are preferred.
- the mixing ratio of the epoxy resin and the curing agent is such that the acid anhydride equivalent is 0.5 to 1.5 equivalents, preferably 0.7 to 1 equivalent of the epoxy group of the epoxy resin.
- the ratio should be 1.2 equivalents.
- the amount of the acid anhydride-based curing agent is less than 0.5 equivalent, the hue after curing will be poor, and if it exceeds 1.5 equivalents, the moisture resistance tends to decrease.
- Other curing agent alone When used in combination of two or more, the amount used can be determined according to the above-mentioned equivalent ratio.
- curing accelerator examples include tertiary amine, imidazole, quaternary ammonium salt, organic metal salt, phosphorus compound, urea compound and the like. Of these, tertiary amines, imidazoles, phosphorus compounds and the like are particularly preferred.
- the compounding ratio of the curing accelerator is preferably from 0.05 to 7 parts by weight, more preferably from 0.2 to 3 parts by weight, based on 100 parts by weight of the epoxy resin. If the amount of the curing accelerator is less than 0.05 part by weight, a sufficient curing promoting effect cannot be obtained, and if it exceeds 7 parts by weight, the cured product may be discolored.
- antioxidant examples include conventionally known compounds such as a phenolic compound, an amine compound, an organic sulfur compound, and a phosphine compound.
- any of conventionally known modifiers such as glycols, silicones, and alcohols can be used.
- a surfactant is blended in order to smooth the film surface when the epoxy resin is formed while being exposed to air by a casting method.
- the surfactant used for such a purpose include silicone-based, acryl-based, and fluorine-based surfactants, and silicone-based surfactants are particularly preferred.
- the transparent relaxation layer 12 reduces the pressing force applied by pen input to prevent image bleeding, and imparts appropriate elastic deformation by pen input to improve pen writing quality. Further is intended to alleviate external shock, the dynamic storage modulus is preferably Ru der below 1 X 1 0 7 P a at 2 0 ° C, more preferably l X 1 0 3 ⁇ 7 X 1 0 6 and even not good in P a.
- the above-mentioned moderate elastic deformability means that when the input pen M is brought into contact with a load of 300 g, the contact portion sinks to a depth of 20 to 100 zm and the original load is removed. It means the property of returning to the state quickly.
- Polyacetal resin is mainly used as the material of the input pen ⁇ .
- the pen tip has a radius of about 0.8 mm.
- good writing quality can be obtained by sinking in the above specified range, but this is due to the fact that when writing on paper with a pole pen or the like, desk writing is better than when writing on a hard desk. The effect is the same as writing on paper with better writing.
- the thickness of the transparent relaxation layer 12 is set in the range of 0.2 to 2 mm. If the thickness is less than 0.2 mm, image blurring due to pen input occurs, the writing quality of the pen is reduced, and the liquid crystal panel is easily broken by impact. If the thickness exceeds 2 mm, image deterioration is likely to occur due to the problem of parallax. Particularly desirable is 1.5 mm or less.
- the material of the transparent relaxation layer 12 can be widely used as long as it has the above thickness, excellent transparency (transmittance of 60% or more), and the above-mentioned dynamic storage modulus G '.
- thermoplastic resins such as ribtilal resin and polystyrene resin, polystyrene-based, polyolefin-based, polygen-based, vinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, fluorine-based, chlorinated polyethylene-based, and polynorbornene-based
- Thermoplastic elastomers exhibiting rubber elasticity, such as various polymers, polystyrene / polyolefin copolymers, (hydrogenated) polystyrene 'putadiene copolymers, and polystyrene
- the transparent buffer layer 12 is made of an adhesive.
- the adhesiveness can be used to directly adhere to the liquid crystal panel 2 (via the optical film 3), thereby simplifying the device configuration.
- an adhesive may be any one that has excellent transparency and has the above-mentioned dynamic storage modulus G ′, and is made of an acrylic, rubber, polyester, silicone, etc.
- Various types of adhesives such as type, light (ultraviolet ray, electron beam) and cross-linking type can be used. From the viewpoint of transparency and durability, an acrylic pressure-sensitive adhesive is particularly preferred.
- the acryl-based pressure-sensitive adhesive is obtained by appropriately mixing various additives such as an antioxidant, an ultraviolet absorber, a tackifier, a plasticizer, and a light-diffusing agent into an acryl-based polymer. It may be a composite. If necessary, a cross-linking treatment may be performed to adjust the adhesiveness and heat resistance.
- Acryl-based polymers contain (meth) alkyl acrylate as the main component. However, if necessary, a copolymerizable modifying monomer is added for the purpose of improving the physical properties such as optical properties and heat resistance, and polymerization is carried out by a conventional method.
- the amount of the above-mentioned (meth) acrylic acid alkyl ester 6 0-1 0 0 wt 0/0, preferably 8 5-1 0 0 wt%, the amount of the above-mentioned reforming monomer one 4 0 ⁇ 0% by weight, preferably 15-0% by weight. / 0 is better. With such a monomer composition, good results can be obtained in terms of impact force relaxation characteristics and the like.
- (meth) acrylic acid alkyl ester a linear or branched (meth) acrylic acid alkyl ester having an alkyl group having 1 to 18, preferably 4 to 12 carbon atoms is used.
- Modifying monomers that can be copolymerized include acrylic acid, methacrylic acid, phenolic oleate acrylate, oleopene pentinoleate acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid.
- Carboxyl group-containing monomers such as oleic anhydride monomers such as oleic anhydride and itaconic anhydride, styrene sulfonic acid, acrylsulfonic acid, 2- (meth) acrylamide 2-methylpropanesulfonic acid, (meth) acrylylamide Monomers containing a snorenoic acid group such as dopropane sulfonic acid, sulfopropyl (meth) atalylate, (meth) atalyloyloxynaphthalene snolefonic acid, and monomers containing a phosphoric acid group such as 2-hydroxyxenotin atalyloyl phosphate
- atarylamide (N-substituted) amines such as N, N-dimethyl (meth) atarylamide, N-butyl (meth) atarylamide, N-methylol (meth) atarylamide,
- Acrylate monomers containing epoxy groups such as glycidin (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, and (meth) acrylate
- epoxy groups such as glycidin (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, and (meth) acrylate
- Polyethylene glycol, glycerol-based acrylate resin such as methoxypolypropylene glycol (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, fluorine (meth) acrylate, silicone
- Acrylate-based monomers such as butane (meth) acrylate and 2-methoxyl acrylate can also be used as modifying monomers.
- the polymerization of the monomer can be performed by a known polymerization method such as solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization.
- a polymerization initiator such as a thermal polymerization initiator or a photopolymerization initiator is used depending on the polymerization method.
- the amount of the polymerization initiator to be used is appropriately selected depending on the kind within a range of 0.05 to 5 parts by weight per 100 parts by weight of the monomer.
- the photopolymerization initiator is used in an amount of 0.05 to 1 part by weight, preferably 0.05 to 0.5 part by weight. If the amount is too low, a large amount of unreacted monomer remains after the initiation of photopolymerization, causing bubbles to be generated at the bonding interface, etc., and if the amount is excessive, the photopolymerization initiator remains during the start of the photopolymerization, resulting in yellowing, etc. Easy to cause.
- the thermal polymerization initiator is preferably used in an amount of 0.01 to 5 parts by weight, particularly preferably 0.05 to 3 parts by weight for the same reason as described above.
- photopolymerization initiators include 4- (2-hydroxyethoxy) fuunil (2-hydroxy-2-propyl) ketone, ⁇ -hydroxy-1- ⁇ , a 'dimethylinolacetophenone, methoxyacetophenone, 2 , 2-Dimethoxy 2 -Pheninoleacetophenone, 2,2-Diethoxyacetophenone, 1 -Hydroxycyclohexinolepheninoleketone, 2-Methyl-11- [4- (Methylthio) -Phenyl] -12-Morpholinopropane Acetophenone-based compounds such as 1; benzoin ethenooleate / benzo, benzoin isopropinoleate; benzoin atenoole compounds such as anizoinmeth / leatenore; 2-methinole 1-2-hydroxypropiophenone; Conversion of ketal-based compounds such as benzene-based compounds and benzyld
- thermal polymerization initiators include benzoyl peroxide, t-butyl perbenzoate, tamenhidropoperoxide, diisopropylperoxydicarbonate, di-n-propylperoxydicarbonate, and di (2-ethoxyhexyl) peroxide.
- thermal polymerization initiators include benzoyl peroxide, t-butyl perbenzoate, tamenhidropoperoxide, diisopropylperoxydicarbonate, di-n-propylperoxydicarbonate, and di (2-ethoxyhexyl) peroxide.
- 2,2'-azobisisobutyronitrile 2,2'-azobis (2 1,2'-Azobis (2,4-dimethinolevaleronitrinole), 2,2'-Azobis (2,4-dimethinole-4-methoxyvaleronitrile), dimethyl 2,2'-azobis (2-methylpropionate), 4,4'-azobis (4-monocyanoparelic acid), 2,2 '
- Other azo compounds such as —azobis (2-hydroxymethylpropionitrile) and 2,2′-azobis [2- (2-imidazoline-1-yl) propane] are also used.
- cross-linking agent for increasing the cohesive force of the transparent relaxation layer and increasing the shear strength during the polymerization treatment, it has two or more (meth) acryloyl groups in the molecule.
- Polyfunctional (meth) acrylates may be added as needed.
- hexanediol di (meth) atalilate, (poly) ethylene glycol di (meth) atarilate, (poly) propylene glycol corone resin (meth) ata relate, neopentinoreguri corone resin (meta) Atalylate, pentaerythritol di (meta) atalylate, trimethylolpropane tri (meta) atalylate, pentaerythritol tri (meta) atalylate, dipentaerythritol hexa (meta) terelate, epoxy atalylate , Polyester acrylate and urethane acrylate.
- the amount of such a polyfunctional (meth) acrylate used is 0.01 to 1 part by weight, preferably 0.05 to 5 parts by weight, per 100 parts by weight of the monomer. In the case of (3), it is better to use a large amount, and in the case of a trifunctional or higher polyfunctional one, it is better to reduce the amount. If the amount is too small, the degree of cross-linking after photopolymerization is low, and bubbles are likely to be generated at the bonding interface. If the amount is too large, the adhesive strength is reduced, and blistering and the like are likely to occur.
- the polymerization treatment is performed by a photopolymerization method such as ultraviolet rays or a thermal polymerization method depending on the type of the polymerization initiator.
- the photopolymerization method is particularly preferred from the viewpoints of workability and tackiness of the transparent relaxation layer.
- This photopolymerization method is performed in an atmosphere without oxygen replaced by an inert gas such as nitrogen gas, or In c photopolymerization method is preferably carried out while blocking air with a coating by external transparent film or an ultraviolet wavelength range is electromagnetic Radiation of about 1 8 0 ⁇ 4 6 0 nm force which longer wavelength or shorter It may be electromagnetic radiation of a wavelength.
- Irradiation devices such as mercury arc, carbon arc, low-pressure mercury lamp, medium and high-pressure mercury lamp, metal halide lamp, chemical lamp, and black light lamp are used as the ultraviolet light source.
- the intensity of the ultraviolet light can be appropriately set by adjusting the distance to the irradiation object and the voltage. Normally, it is desirable to use an integrated light amount of 0.5 to 10 JZcm 2 in consideration of irradiation time (productivity).
- the pressure-sensitive adhesive may undulate due to the heat of polymerization in the transparent relaxation layer, and the undulation of the adhesive can be suppressed by cooling during the photopolymerization.
- the transparent relaxation layer 12 may contain one or more plasticizers having good transparency, if necessary.
- the amount of the above-mentioned acrylic pressure-sensitive adhesive is 5 to 300 parts by weight, preferably 10 to 200 parts by weight, per 100 parts by weight of the above-mentioned monomer (and thus the acrylic polymer). It is recommended to use parts by weight. .
- plasticizers include dimethyl phthalate, getyl phthalate, dibutyl phthalate, diheptyl phthalate, di-2-ethylhexyl phthalate, disononyl phthalate, disodecyl phthalate, dibutyl benzyl phthalate, Phthalic acid compounds such as dioctyl and butylphthalylbutynoleglycolate; diisobutyl adipate, diisonol adipate, disodecyl adipate, dibutoxetyl adipate and the like; adipic acid compounds such as dibutoxystyl adipate; dibutyl sebacate; di-2-ethyl ethyl sebacate; Sebacic acid compounds, triethylene phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl phenyl phosphate,
- the transparent relaxation layer 12 has a neon light (570 to 590 nm) absorption characteristic to increase color purity and a liquid crystal color correction within a range that does not impair transparency.
- Pigments such as pigments and dyes, tackifiers, antioxidants, anti-aging agents, ultraviolet absorbers, silane coupling agents, natural and synthetic resins, acrylic oligomers, glass fibers and glass beads, etc. Additives can be blended. Further, light diffusing properties may be imparted by incorporating fine particles.
- the transparent relaxation layer 12 can also be composed of a polymer composite material using an organic layered clay mineral.
- the organic layer viscosity mineral dispersible, as a film formable main material the 2 0 dynamic storage modulus ° C shall have 6 X 1 0 6 P a or less (practically l X 1 0 3 ⁇ l X 1 0 5 P a) polyurethane is, polyether ester, acrylic, natural rubber, by using a transparent polymer resin or rubber such as butyl rubber, good relaxation and external impact of the pen input As a result, favorable results can be obtained for preventing image bleeding of the image display panel and preventing cracking of the image display panel.
- Acrylic polymers are particularly useful in terms of heat resistance, moisture resistance reliability, transparency, processability, and affinity with the Ariiso layered clay mineral.
- the transparent laminate of the present invention can also be used for a resistive film type pen input image display device. That is, FIGS. 1 and 2 show an example in which the transparent laminate is used for an electromagnetic induction type pen-input image display device, but the transparent laminate is formed of a surface treatment layer and a transparent relaxation layer. By using a structure in which a pair of transparent conductive films facing each other at a predetermined interval is provided in any part between them, it can be used for a resistive film type pen input image display device.
- FIG. 3 shows this example, in which a pair of transparent conductive films provided with a transparent conductive film 6 on one surface of a transparent polymer film 7A and a pair of transparent conductive films 6 on the transparent conductive film 6 side.
- the transparent laminated body 1 is configured to be disposed between the surface-treated film 10A and the transparent rigid layer 11 so as to face each other with a gap therebetween.
- the surface of the transparent polymer film 7A opposite to the surface on which the transparent conductive film 6 is formed is interposed through the transparent adhesive layer 7B to form the surface-treated film 1A.
- the transparent rigid layer 11 and the transparent relaxation layer Modifications can also be taken.
- a plastic film similar to that used for the surface-treated film 1OA or the transparent rigid layer 11 is used for the transparent polymer film 7A.
- a plastic film having a difference in thermal shrinkage of 0.2% or less in both the MD direction and the TD direction after heating at 150 ° C. for 30 minutes is preferable.
- the thickness of such a transparent polymer film 7A can be determined as appropriate, but is generally 3 to 300 ⁇ m, preferably 5 to 300 ⁇ m, in view of workability and performance during panel formation. 2250 ⁇ , particularly preferably 10-200 / xm.
- materials for forming the transparent conductive film 6 include metals such as gold, silver, platinum, palladium, rhodium, indium, copper, aluminum, nickel, chromium, titanium, iron, cobalt, tin, and alloys thereof, Metal oxides such as indium oxide, tin oxide, titanium oxide, cadmium oxide, composite oxides of these, and other metal compounds such as copper iodide. Particularly preferred is a composite oxide of indium and tin (hereinafter referred to as ITO).
- ITO composite oxide of indium and tin
- the transparent conductive film 6 is formed by, for example, a vacuum deposition method, a sputtering method, a spray pyrolysis method, an ion plating method, a chemical plating method, an electric plating method, Alternatively, it can be carried out by an appropriate thin film forming method such as a combination method thereof. From the viewpoint of the film formation rate—the ease of forming a large-area film, the productivity, and the like, the vacuum evaporation method—sputtering method is preferable.
- the thickness of the transparent conductive film 6 can be appropriately determined according to the purpose of use. Especially as the electrode for Tatsuchipaneru, preferably it has a surface resistance was more than 1 0 3 Omega Zeta port, generally what was the surface resistance of less than 1 0 9 Omega Zeta port preferred. Such a surface resistance is obtained by setting the thickness of the transparent conductive film 6 to 30 to 60 OA in the case of a metal-based conductive film, and 80 to 50,000 in the case of a metal-oxide-based conductive film. It can be achieved by setting to 0 A.
- the transparent conductive film 6 may be formed directly on the transparent polymer film 7A, or an undercoat layer may be interposed between the transparent polymer film 7A and the transparent conductive film 6.
- an undercoat layer may be interposed between the transparent polymer film 7A and the transparent conductive film 6.
- Examples of the material for forming the undercoat layer include resins such as acrylic resins, urethane resins, and epoxy resins, and hydrolysates of organic silicon compounds.
- the formation of the undercoat layer composed of these forming materials can be performed by coating a coating solution having a desired composition on a polymer film using a doctor knife, a bar coater, a gravure roll coater, a curtain coater, a knife coater, or the like. it can.
- an undercoat layer made of a metal selected from the group consisting of silicon, titanium, tin, and zinc, an oxide of the metal, an alloy of the metal, and the like can also be used.
- Metal oxides for forming the undercoat layer include silicon oxide, titanium oxide, tin oxide, tin oxide hafnium oxide, silicon oxide tin oxide, zinc oxide tin oxide, and titanium oxide monoxide. Can be used.
- Such an undercoat layer can be formed by applying a vacuum thinning technique such as a sputtering method, a resistance evaporation method, or an electron beam evaporation method.
- One or more undercoat layers can be formed.
- the film surface of the transparent polymer film 7A is subjected to corona discharge treatment, ultraviolet irradiation treatment, Appropriate pretreatment such as plasma treatment or sputter etching treatment may be performed to enhance the adhesion between the transparent conductive film 6 and the undercoat layer.
- the transparent conductive film (the transparent polymer film 7 A) and the transparent conductive film 6 are formed on the surface opposite to the surface on which the transparent conductive film 6 is formed.
- the pressure-sensitive adhesive layer 7B it is preferable to use the same pressure-sensitive adhesive as that used for the above-mentioned transparent relaxation layer.
- an elastic coefficient of IX 1 0 5 ⁇ l X 1 0 7 dyn Zcm 2 is 1 tm or more thick
- good Mashiku is desirably a pressure-sensitive adhesive layer of 5 ⁇ 5 0 0 ⁇ m.
- the transparent laminate 1 shown in FIG. 3 includes a pair of transparent conductive films each having a transparent conductive film 6 formed on one side of a transparent polymer film 7A, between the surface-treated film 10A and the transparent rigid layer 11.
- This configuration is different from this configuration in that the transparent conductive film 6 is directly formed on the non-processed surface of the surface-treated film 10A, and a pair of the transparent conductive films 6 is formed as shown in an example described later. It may be configured to be disposed on the transparent rigid layer 11 via a spacer.
- the transparent conductive film 6 was formed directly on the non-processed surface of the surface-treated film 10A, and separately, the transparent conductive film 6 was formed directly on the transparent rigid layer 11. These may be arranged on the transparent relaxation layer 12 such that the transparent conductive films 6 face each other via a spacer.
- the use of the transparent pressure-sensitive adhesive layer 7B can be omitted. Note that, in FIG. 4 described above, components other than those described above are the same as those in FIG. 1, and are denoted by the same reference numerals as in FIG.
- the transparent laminate 1 includes the above-described surface treatment layer 10 (surface treatment film 1 OA), the transparent rigid layer 11 and the transparent relaxation layer 12 as essential components, and the surface treatment layer 1 in the resistive film method. 1 and a transparent relaxation layer 12, a pair of transparent conductive films 6 opposed to each other at a predetermined interval, for example, as shown in FIGS. They are stacked as shown in FIG. 4, and the overall thickness is preferably equal to or less than the thickness of the conventional protection plate.
- the polarizing plate 30 includes a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially honole-manolelated polyvinyl alcohol-based film, and a saponified ethylene-vinyl acetate copolymer-based film.
- a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially honole-manolelated polyvinyl alcohol-based film, and a saponified ethylene-vinyl acetate copolymer-based film.
- examples thereof include films stretched by adsorbing a color dye, polyene alcohol dehydration products, and polyene oriented films such as polychlorinated vinyl dehydrochlorination products.
- the thickness is usually 5 to 80 / im, but is not particularly limited to this.
- the polarizing plate 30 is usually used in a form in which a transparent protective film is attached to one or both sides of the above-mentioned polarizer.
- the transparent protective film preferably has excellent transparency, mechanical strength, heat stability, moisture shielding property, and isotropy.
- polyester-based polymers such as polyethylene terephthalate and polyethylene naphthalate
- senorellose-based polymers such as diacet / reseno-relose, triacetinoreseno-relose
- acryl-based polymers such as polymethinole (meta) acrylate Styrene-based polymers such as polystyrene, acrylonitrile and styrene copolymers, polycarbonate-based polymers, polyethylene, polypropylene, polyolefins such as polyolefins having cyclo- or norpolenene structures, and ethylene-propylene copolymers.
- chloride chloride polymer nylon, aromatic polyamide polymer, imid polymer, snorefone polymer, polyether / resnorefone polymer, polyether ether Ketone-based polymers, vinylidene chloride-based polymers, vinylinoleanolone-based polymers, vinylinoleptyranore-based polymers, arylate-based polymers, polyoxymethylene-based polymers, epoxy-based polymers, and blends of these polymers Film.
- the transparent protective film a film made of a cellulosic polymer is preferable.
- the thickness of the transparent protective film is not particularly limited, but is usually 500 / m or less, preferably 1 to 300 / _tm, more preferably 5 to 2 / m. It is preferably 0 ⁇ m.
- the polarizing plate and the transparent protective film are bonded together using an isocyanate adhesive, a polybutyl alcohol adhesive, a gelatin adhesive, a vinyl latex, an aqueous proester, or the like.
- the retardation plate 31 is formed by laminating the retardation plate 31 on the polarizing plate 30 to change linearly polarized light into elliptically polarized light or circularly polarized light, or change elliptically polarized light or circularly polarized light into linearly polarized light. It is also used for changing the polarization direction of linearly polarized light.
- a 14-wave plate ( ⁇ 4 plate) is used as a retardation plate for changing linearly polarized light to circularly polarized light or vice versa.
- a '1/2 wavelength plate is used as a retardation plate for changing the polarization direction of linearly polarized light.
- an elliptically polarizing plate is formed by laminating a retardation plate 31 on a polarizing plate 30, it is effective for compensating for the coloring caused by the birefringence of the STN-type liquid crystal display device and for displaying uncolored black and white, etc.
- Used for Controlling the three-dimensional refractive index is preferable because coloring that occurs when the screen of the liquid crystal display device is viewed from an oblique direction can be compensated.
- the retardation plate 31 is laminated on the polarizing plate 30 to form a circularly polarizing plate, for example, it is effective for adjusting the color tone of an image of a reflective liquid crystal display device in which the image is displayed in color. It is used and also has an anti-reflection function.
- the retardation plate 31 is not particularly limited and supports a birefringent film, a liquid crystal polymer alignment film, and a liquid crystal polymer alignment layer formed by uniaxial or biaxial stretching of a known polymer material. And the like.
- the thickness of the retardation plate is not particularly limited, but is generally 20 to 150 // m.
- the retardation plate 31 has an appropriate retardation according to the purpose of use, such as various wave plates and those for the purpose of compensating for visual perception of coloring due to birefringence of the liquid crystal layer.
- two or more retardation plates may be stacked to control optical characteristics such as retardation.
- the retardation plate 31 may be made of a visual compensation (optical compensation) film.
- This visual compensation film is a film that widens the viewing angle so that the image can be seen relatively clearly even when the screen of the liquid crystal display device is viewed from a direction not perpendicular to the screen but slightly oblique.
- This visual compensation retardation plate is composed of a retardation film, an alignment film such as a liquid crystal polymer, or a transparent film base having an alignment layer such as a liquid crystal polymer supported thereon.
- biaxially stretched film such as polymer film with birefringence, polymer with birefringence that is uniaxially stretched in the plane direction and is also stretched in the thickness direction and has a controlled refractive index in the thickness direction, or an obliquely oriented film And the like are used.
- the tilt orientation film There is no particular limitation on the tilt orientation film, and a known technology can be used.
- optical compensation that supports an optically anisotropic layer composed of a liquid crystal polymer alignment layer, especially a tilted alignment layer of a discotic liquid crystal polymer, with respect to a triacetyl cellulose film, in order to achieve a wide viewing angle for viewing.
- a retardation plate can be preferably used.
- the transparent pressure-sensitive adhesive layer 32 used for laminating the retardation (optical compensation) plate 31 on the polarizing plate 30 various kinds of known acryl-based and rubber-based transparent materials can be used.
- An adhesive is used. The same adhesive as described above is used for the transparent adhesive layer 4A for attaching the optical film 3 to the visual surface side of the liquid crystal panel 2 and the transparent adhesive layer 4B for attaching the optical film 3 to the back surface side.
- the retardation (optical compensation) plate 31 is laminated on the polarizing plate 30, but as other optical layers, a liquid crystal display such as a reflection plate, a semi-transmission plate, and a brightness enhancement film is used.
- a liquid crystal display such as a reflection plate, a semi-transmission plate, and a brightness enhancement film
- Various optical layers used for forming the device may be used, and one or more of these layers may be laminated on the polarizing plate 30.
- Fig. 5 shows an optical film 3 as well as a 1/4 wavelength plate 50 and a cholesteric liquid crystal film layer 51 as a brightness enhancement film 5.
- the brightness enhancing film 5 is bonded to the polarizing plate 30 of the optical film 3 located on the back side of the liquid crystal panel 2 with the transparent adhesive layer 4C interposed therebetween. It is a laminate.
- FIG. 5 components other than those described above are the same as those in FIG. 2, and are denoted by the same reference numerals as in FIG. 2, and description thereof is omitted.
- the brightness enhancement film has the property of reflecting linearly polarized light of a predetermined polarization axis or circularly polarized light of a predetermined direction when natural light enters due to reflection from the back of a backlight of a liquid crystal display device, etc., and exhibits the property of passing other light.
- the brightness enhancement film is laminated with a polarizing plate, light is incident from a backlight light source to obtain transmitted light in a predetermined polarization state, and light other than the predetermined polarization state is not transmitted. reflect.
- the light reflected on the surface of the brightness enhancement film is reversed through a reflection layer (not shown) provided on the rear side of the brightness enhancement film, and re-enters the brightness enhancement film, and a part or all of the light is transmitted as light of a predetermined polarization state.
- the polarizer is provided with polarized light that is difficult to absorb, thereby increasing the light length that can be used in liquid crystal display devices and the like, thereby improving brightness.
- a diffusion plate may be provided between the brightness enhancement film and the reflection layer.
- the light in the polarization state reflected by the brightness enhancement film goes to the reflection layer, but the installed diffusion plate uniformly diffuses the passing light, and simultaneously eliminates the polarization state and becomes a non-polarized state. That is, the diffuser returns the polarized light to the original natural light.
- the light in the non-polarized state that is, the light in the natural light state, repeatedly travels toward the reflection layer or the like, is reflected through the reflection layer, passes through the diffuser, and re-enters the brightness enhancement film.
- the brightness of the display screen is maintained and the brightness unevenness of the display screen is reduced at the same time.
- the number of repetitions of reflection of the first incident light increases moderately, and a uniform bright display screen can be provided in combination with the diffusion plate function.
- the brightness enhancement film is not limited to the one shown in the figure, but transmits other polarized light having a predetermined polarization axis, such as a multilayer thin film of a dielectric or a multilayer laminate of thin films having different refractive index anisotropies. Indicates that it reflects light, such as an alignment film made of cholesteric liquid crystal polymer or an alignment liquid crystal layer supported on a film substrate. An appropriate material such as a material exhibiting a property of transmitting light can be used.
- a brightness enhancement film of a type that transmits linearly polarized light having a predetermined polarization axis it is possible to efficiently transmit the transmitted light while suppressing the absorption loss of the polarizing plate by directly entering the transmitted light into the polarizing plate with the polarization axis aligned.
- a brightness enhancement film that transmits circularly polarized light such as a cholesteric liquid crystal layer
- a quarter wave plate as the retardation plate, circularly polarized light can be converted to linearly polarized light.
- a retardation plate that functions as a one-to-four-wave plate in a wide wavelength range such as the visible light region is, for example, a retardation plate that functions as a 1-Z four-wave plate for monochromatic light with a wavelength of 550 nm, It can be obtained by a method of superimposing a retardation layer functioning as a retardation plate exhibiting retardation characteristics, for example, a one-to-two wavelength plate.
- the retardation plate disposed between the polarizing plate and the brightness enhancement film may be composed of one or more retardation layers.
- the cholesteric liquid crystal layer is also one that reflects circularly polarized light in a wide wavelength range such as the visible light region by combining two or more layers with different reflection wavelengths and by arranging two or more layers. Based on this, it is possible to obtain transmission circularly polarized light in a wide wavelength range.
- the polarizing plate like the above-mentioned polarization separating plate, has two or more layers with the polarizing plate. And a reflective circular polarizing plate or a transflective elliptically polarizing plate in which a reflective polarizing plate, a transflective polarizing plate and a retardation plate are combined, and the like.
- the polarizing plate and various optical layers can be set at an appropriate arrangement angle according to a target retardation characteristic or the like.
- the transparent laminate 1 is provided on the visual surface side (pen input side) of the liquid crystal panel 2. It is directly pasted with the transparent relaxation layer 1 2 inside.
- the input image display device includes a well-known component such as a diffusion plate, an anti-glare layer, an anti-reflection layer, a prism array, a lens array sheet, a light diffusion plate, a directional diffuser, Buckler It is possible to arrange various parts, such as an it, in one or two or more layers at an appropriate position.
- parts means “parts by weight”.
- the measurement of the dynamic (shear) storage modulus G ′ of the transparent rigid layer and the transparent relaxation layer constituting the transparent laminate was performed by using a viscoelastic spectrometer (manufactured by Rheometric Scientific). "ARES device”), frequency of 1 Hz
- the dynamic storage modulus G 'at 20 ° C was determined by temperature dispersion measurement.
- 3,4-epoxycyclohexylmethinolate 3,4-epoxycyclohexanecarboxylate 100 parts, curing agent methyltetrahydrophthalic anhydride 120 parts, curing accelerator tetra-n-butylphosphonium 2 parts of 0, O-Jetyl phosphorodithioate are mixed with stirring, and the epoxy resin film of 600 ⁇ m is heat-cured at 180 ° C for 30 minutes by the casting method to obtain a transparent rigid resin.
- the dynamic storage modulus G 'at 20 ° C of this transparent rigid layer was as shown in Table 1.
- the above-mentioned surface-treated film is adhered to the transparent rigid layer using the above transparent adhesive solution (the thickness of the transparent adhesive layer is 25 ⁇ m).
- the layers transparent relaxing pressure-sensitive adhesive layers) were laminated to form a transparent laminate. ⁇
- a polyvinyl alcohol film having a thickness of 80 / xm is stretched 5 times in an aqueous solution of iodine and then dried.
- a triacetyl cellulose film as a transparent protective layer is adhered on both sides of the film with an adhesive.
- a polarizing plate film was used.
- the thickness of the transparent adhesive layer is 25 ⁇
- a polycarbonate film (a retardation plate) was used. 50 ⁇ m was bonded together to form an optical film.
- the thickness of the transparent adhesive layer is 25 ⁇ m.
- phase difference plate side thickness 2 5 mu m of the transparent adhesive layer
- a transparent laminate was obtained according to Example 1, except that the thickness of the transparent relaxation layer was changed to 500 ⁇ m. Further, a pen-input liquid crystal display device of an electromagnetic induction type was manufactured in the same manner as in Example 1 using this transparent laminate.
- a transparent relaxation layer was formed in the same manner as in Example 1 except that the same amount of butyl acrylate was used instead of 100 parts of 2-ethylhexyl acrylate. In the same manner as in Example 1, a transparent laminate was obtained. Further, using this transparent laminate, an electromagnetic induction type pen-input liquid crystal display device was manufactured in the same manner as in Example 1.
- the transparent relaxation layer was formed in the same manner as in Example 1 except that 98 parts of isooctyl acrylate and 2 parts of acrylic acid were used instead of 100 parts of 2-ethylhexyl acrylate.
- a transparent laminated body was obtained in the same manner as in Example 1 using this.
- a pen-input liquid crystal display device of the electromagnetic induction type was produced in the same manner as in Example 1.
- Example 5 A transparent laminate was obtained according to Example 1, except that the thickness of the transparent rigid layer was changed to 300 ⁇ m. Further, a pen-input liquid crystal display device of an electromagnetic induction type was manufactured in the same manner as in Example 1 using this transparent laminate.
- a transparent laminate was obtained according to Example 1, except that the thickness of the transparent relaxation layer was changed to 25 ⁇ . Further, a pen-input liquid crystal display device of an electromagnetic induction type was produced in the same manner as in Example 1 using this transparent laminate.
- Example 1 A transparent laminated body was obtained in the same manner as in Example 1 except that the use of the transparent rigid layer was omitted, and using this, an electromagnetic induction pen-input liquid crystal display device was manufactured in the same manner as in Example 1.
- the transparent rigid layer and the transparent relaxation layer constituting the transparent laminate used at 20 ° C were used.
- the dynamic storage modulus and thickness are summarized in Table 1.
- Example 1 2 X 1 0 9 6 0 0 3 X 1 0 1, 0 0 0 Example 2 2 X 1 0 9 6 0 0 3 X 1 0 5 0 0 Example 3 2 1 0 9 6 0 0 7 X 1 0 4 1, 0 0 0 Example 4 2 X 1 0 9 6 0 0 5 X 1 0 4 1, 0 0 0 Example 5 2 1 0 9 3 0 0 3 X 1 0 1, 0 0 0 0 Comparative example 1 2 X 1 0 9 6 0 0 3 X 1 0 4 2 5 Comparative Example 2 3 X 1 0 1, 0 0 0 0 Next, each of the electromagnetic induction methods of Examples 1 to 5 and Comparative Examples 1 and 2 described above was used. The performance of the liquid crystal display was evaluated by the following method. These results were as shown in Table 2.
- the input pen used had a shape with a radius of about 0.8 mm and was mainly made of polyacetal resin.
- the pen input was evaluated under the conditions of a pen load of 300 g and a liquid crystal display. The spread of the liquid crystal when it was in contact with the outermost surface of the device was measured.
- a liquid crystal panel a tablet PC “DynaBokSSS350” manufactured by Toshiba Corporation was used.
- ⁇ - Good image without bleeding (liquid crystal spreading diameter less than 1 Omm)
- X Image bleeding and poor (liquid crystal spreading diameter 1 Omm or more)
- the above load was removed, it was observed whether or not it returned to the original state within 2 seconds, and when it did return, it was judged that the recovery was good, and when it did not return, it was judged that the recovery was poor. In each of Examples 1 to 5 and Comparative Examples 1 and 2, the recoverability was good.
- a hard-coated polyethylene terephthalate film (“G01S” manufactured by Kimoto) having a thickness of 12.5 // ⁇ was used.
- the non-hard-coated surface of the above-mentioned surface-treated film is subjected to plasma treatment in an argon atmosphere, an ITO thin film is formed on the plasma-treated surface by a sparing, and then a silver electrode is printed on the ITO surface.
- a transparent conductive film was produced.
- a pair of the transparent conductive films was attached to each other with the silver electrode side facing each other via a spacer to produce a touch panel.
- the above touch panel is bonded to the transparent rigid layer using the transparent adhesive solution (the thickness of the transparent adhesive layer is 25 ⁇ m), and the transparent relaxation layer ( (Transparent relaxation adhesive layer) were laminated to form a transparent laminate.
- the transparent adhesive solution the thickness of the transparent adhesive layer is 25 ⁇ m
- the transparent relaxation layer transparent relaxation adhesive layer
- the transparent laminate is bonded to the polarizing plate side of the optical film via the transparent relaxation layer, and the retardation plate side of the optical film is further bonded to the polarizing plate using the transparent adhesive solution (transparent).
- the thickness of the adhesive layer was 25 ⁇ m.
- the above-mentioned transparent adhesive solution was used (the thickness of the transparent adhesive layer was 25 ⁇ m), and the retardation plate side of the other optical film was applied.
- a resistive film type pen input liquid crystal display device was manufactured.
- a transparent laminate was obtained according to Example 6, except that the thickness of the transparent relaxation layer was changed to 500 ⁇ m. Further, a pen-input liquid crystal display device of a resistive film type was produced in the same manner as in Example 6 using this transparent laminate.
- the transparent relaxation layer 100 parts of 2-ethylhexyl acrylate A transparent laminated layer was formed in the same manner as in Example 6, except that the same amount of butyl acrylate was used in place of the above, and a transparent relaxation layer was formed in the same manner as in Example 6. Further, using this transparent laminate, a resistive film type pen input liquid crystal display device was produced in the same manner as in Example 6.
- the transparency was relaxed according to Example 6, except that 98 parts of isooctyl acrylate and 2 parts of acrylic acid were used instead of 100 parts of 2-ethylhexyl acrylate.
- a layer was formed, and using this, a transparent laminate was obtained in the same manner as in Example 6. Further, a pen-type liquid crystal display device of a resistive film type was produced in the same manner as in Example 6 using this transparent laminate.
- a transparent laminate was obtained according to Example 6, except that the thickness of the transparent rigid layer was changed to 300 ⁇ m. Also, a pen-input liquid crystal display device of a resistive film type was produced in the same manner as in Example 6 using this transparent laminate.
- a transparent laminate was obtained according to Example 6, except that the thickness of the transparent relaxation layer was changed to 25 m. Further, a pen-input liquid crystal display device of a resistive film type was produced in the same manner as in Example 6 using this transparent laminate.
- Example 6 A transparent laminated body was obtained according to Example 6, except that the use of the transparent rigid layer was omitted, and using this, a resistive film type pen input liquid crystal display device was manufactured in the same manner as in Example 6. .
- Table 3 summarizes the dynamic storage elastic modulus thickness at 20 ° C of the transparent rigid layer and the transparent relaxation layer that constitute the transparent laminate used for the W crystal display device.
- Example 6 2 X 1 0 9 6 0 3 X 1 0 4 1, 0 0 0 Example 7 2 X 1 0 9 6 0 0 3 X 1 0 5 0 0 Example 8 2 X 1 0 9 6 0 0 7 X 1 0 4 1, 0 0 0 Example 9 2 X 10 & 6 0 0 5 X 10 4 1, 0 0 0 Example 10 2 X 10 9 3 0 0 3 X 1 0 4 1, 0 0 0 0 Comparative Example 3 2 X 1 0 9 6 0 0 3 X 1 0 2 5 Comparative Example 4 3 X 1 0 1, 0 0 0 0 0 Next, each of the above Examples 6 to 10 and Comparative Examples 3 and 4 The performance of the resistive film-type one-input liquid crystal display device was evaluated by the same method as described above. These results were as shown in Table 4. The “depth of depression” means that the load was applied by the method described above, and after the gap between the I
- each of the liquid crystal display devices of Examples 1 to 10 having the configuration of the present invention has no image bleeding upon pen input, and also has scratch resistance. It is clear that the liquid crystal panel is also excellent in crack resistance and also excellent in preventing cracking of the liquid crystal panel.
- the pen-input liquid crystal display devices of Comparative Examples 1 and 3 using a transparent laminate having a transparent relaxation layer that is too thin and Comparative Examples 2 and Comparative Example using a transparent laminate having no transparent rigid layer.
- the pen-input liquid crystal display device of No. 4 has blurred images and is inferior in crack prevention.
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Abstract
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US8003200B2 (en) | 2004-10-06 | 2011-08-23 | Nitto Denko Corporation | Transparent electrically-conductive film |
US8048512B2 (en) | 2006-08-03 | 2011-11-01 | Nitto Denko Corporation | Transparent conductive laminate and touch panel equipped with it |
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US8048512B2 (en) | 2006-08-03 | 2011-11-01 | Nitto Denko Corporation | Transparent conductive laminate and touch panel equipped with it |
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Also Published As
Publication number | Publication date |
---|---|
JP2004259256A (ja) | 2004-09-16 |
KR100718400B1 (ko) | 2007-05-14 |
US20050237307A1 (en) | 2005-10-27 |
KR20050063754A (ko) | 2005-06-28 |
CN1698028B (zh) | 2010-05-05 |
CN1698028A (zh) | 2005-11-16 |
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