TW201629726A - Touch sensor integrated with upper plate of LCD panel - Google Patents

Abstract

Disclosed is a touch sensor integrated with upper plate of LCD including: a photo-alignment separation film; a liquid crystal driving electrode disposed on the photo-alignment separation film; and a transparent electrode laminate disposed on the liquid crystal driving electrode, such that a separate LCD panel upper substrate is not required, thereby significantly decreasing the thickness thereof, and therefore, The touch sensor may be implemented in an ultra-thin product or may be usefully applied to a flexible touch screen.

Description

Touch sensor integrated with the upper panel of the LCD panel

The invention relates to a touch sensor for integrating a board on a liquid crystal display panel.

In recent years, display devices such as liquid crystal display (LCD) devices or organic electroluminescence (EL) display devices (which have the advantages of being lightweight, thin, and low power driving) or the like have been used. In office automation devices, audio/video devices or the like.

The LCD device includes a liquid crystal layer as an electrooptic layer, and the organic EL display device includes an organic light-emitting layer as an electro-optic layer.

The LCD device uses an image in which a liquid crystal (which is a material interposed between a liquid and a crystal) changes in transmittance depending on a voltage applied thereto to display an image formed by changing an electrical signal into visual information. . A typical LCD device includes two substrates having electrodes and a liquid crystal layer mounted between the two substrates. The LCD device is lightweight and has a smaller volume than other display devices having the same screen size and operates with low power.

In particular, an LCD device is a display device that displays an image in such a manner that each pixel of a liquid crystal display (LCD) panel disposed on a front surface thereof is selectively transmitted through light emitted from a light source disposed on a rear surface thereof , the pixel acts as a corner of a type of optical switch color. That is, in order to display an image on a screen, a conventional cathode ray tube (CRT) controls the brightness of the light by adjusting the intensity of the electron beam, and the LCD device displays the image while adjusting the light generated by the light source. The intensity controls the brightness.

The LCD device as described above has a configuration in which a color filter substrate (upper substrate) on which a color filter is formed and a thin film transistor substrate (lower substrate on which a film transistor (TFT) is formed) Attached to each other with a liquid crystal layer installed therebetween.

Recently, products that can be driven according to touch by a touch panel attached to an LCD device have been released.

The touch screen panel can be defined as a user interface that is typically attached to the display device to detect electrical characteristics that change at touch points that are touched by a human finger or an opaque object such as a stylus.

An LCD device equipped with a touch screen panel can detect points touched by a user's finger or a stylus on the screen, and implement various applications based on the detected information.

Touch screen panels as described above are typically adhered to surfaces other than flat panel display devices such as LCD devices or organic EL display devices for commercialization in a number of situations.

However, when the touch screen panel is adhered to the outer surface of the flat panel display as described above, the adhesive layer between the touch screen panel and the flat panel display device is necessary and is required to be used independently of the flat panel display device. The additional process of forming a touch screen panel has the disadvantage of increasing process time and cost.

In addition, in the case of the conventional structure, the entire thickness of the flat panel display device is increased due to the touch screen panel adhered to the outer surface of the flat panel display device.

Korean Patent Publication No. 2004-17139 discloses a touch panel integrated image display device and a method of fabricating the same.

Accordingly, it is an object of the present invention to provide a liquid crystal panel (LCD) upper panel integrated touch sensor having a significantly reduced thickness.

The above objectives of the present invention will be achieved by the following characteristics:

(1) A touch sensor integrated with a top panel of a liquid crystal panel (LCD), comprising: a light alignment separation film; a liquid crystal driving electrode disposed on the light alignment separation film; and a transparent electrode lamination And disposed on the liquid crystal driving electrode.

(2) The touch sensor of the integrated LCD upper panel according to (1) above, wherein the photoalignment separation film comprises a polyimine polymer or a polymer comprising a cinnamate group.

(3) The touch sensor of the integrated LCD upper panel of (1) above, further comprising: a first insulating film disposed between the liquid crystal driving electrode and the transparent electrode laminate.

(4) The touch sensor of the integrated LCD upper panel according to (1) above, wherein the transparent electrode laminate comprises a sensing electrode, and a protective film disposed on the sensing electrode.

(5) The touch sensor of the integrated LCD upper panel according to (1) above, which further comprises a polarizing plate disposed on the transparent electrode laminate.

(6) A liquid crystal display (LCD) device comprising the touch sensor integrated with the upper panel of the LCD according to any one of the above (1) to (5).

(7) A method for manufacturing a touch sensor integrated with an upper panel of an LCD, comprising: forming a photo-alignment separation film on a carrier substrate; forming a liquid crystal driving electrode on the photo-alignment separation film; Forming a transparent electrode laminate on the liquid crystal driving electrode; and separating the light alignment The membrane is separated from the carrier substrate.

(8) The method for manufacturing a touch sensor for integrating an upper panel of an LCD according to (7) above, wherein the method for forming a polymer comprising a polyimine or comprising a cinnamate group is used The photo-alignment separation membrane is prepared by applying a composition of a photo-alignment separation membrane of a polymer to the carrier substrate and curing the composition.

(9) The method for manufacturing a touch sensor for integrating an upper panel of an LCD according to (7) above, wherein a decane coupling agent is applied to the carrier substrate and is used for forming comprising a polyfluorene The photo-alignment separation membrane is prepared by applying a composition of a light-aligning separation membrane to the carrier substrate and curing the composition.

(10) The method for manufacturing a touch sensor integrated with an upper panel of an LCD according to (7) above, further comprising: forming a first layer on the liquid crystal driving electrode before forming the transparent electrode laminate An insulating film.

(11) The method for manufacturing a touch sensor for integrating an upper panel of an LCD according to (7) above, further comprising: attaching a polarizing plate to the transparent electrode laminate.

The touch sensor of the present invention integrates the upper plate (upper substrate) of the LCD panel such that a separate substrate on the LCD panel is not required, thereby significantly reducing the thickness thereof. Therefore, the touch sensor of the present invention can be implemented in an ultra-thin product or the touch sensor of the present invention can be effectively applied to a flexible touch screen.

10‧‧‧Light alignment film

20‧‧‧LCD drive electrode

30‧‧‧Transparent Electrode Laminate

40‧‧‧First insulating film

50‧‧‧Polar plate

60‧‧‧ Carrier substrate

100‧‧‧Alignment film

200‧‧‧LCD drive electrode

300‧‧‧Upper board

400‧‧‧Adhesive

500‧‧‧Separation membrane

600‧‧‧Transparent Electrode Laminate

The above and other objects, features and other advantages of the present invention will become more <RTIgt;

1 is a schematic cross section of a structure in which a touch sensor is coupled to a top panel of a conventional LCD panel Figure.

2 to 4 are schematic cross-sectional views respectively illustrating an LCD upper panel integrated touch sensor according to an embodiment of the present invention.

5 and 6 are views schematically illustrating a manufacturing process of an LCD upper panel integrated touch sensor according to an embodiment of the present invention.

The invention discloses a touch sensor integrated with an upper panel of an LCD, comprising: a light alignment separation film; a liquid crystal driving electrode disposed on the light alignment separation film; and a transparent electrode laminate disposed thereon The liquid crystal driving electrode eliminates the need for a separate substrate on the LCD panel, thereby significantly reducing the thickness thereof, and thus, the touch sensor can be implemented in an ultra-thin product or can be touched. The detector is usefully applied to a flexible touch screen.

Hereinafter, exemplary embodiments of the present invention will be described in detail.

<Touch sensor integrated with the upper panel of the liquid crystal display (LCD) panel>

The touch sensor integrated with the upper panel of the liquid crystal display (LCD) panel of the present invention comprises: a light alignment separation film; a liquid crystal driving electrode disposed on the light alignment separation film; and a transparent electrode laminate disposed on the liquid crystal Drive the electrode.

1 is a schematic cross-sectional view of a structure in which a touch sensor is coupled to a top panel of a conventional LCD panel. Referring to FIG. 1, a conventional LCD panel includes an upper substrate (hereinafter, upper plate 300) in which a liquid crystal driving electrode 200 is disposed at one surface thereof, and an alignment film 100 is disposed on the liquid crystal driving electrode 200. In this configuration, the touch sensor 600 is adhered (added) to the other surface of the upper plate 300 via the adhesive 400.

In addition, a film touch feeling such as a flexible touch sensor is prepared in the following manner Detector: A process is performed on the carrier substrate, and then a subsequent process is performed in isolation from the carrier substrate due to the difficulty in performing the process of the film under many conditions. In this case, the touch sensor needs to further include a separation film 500 for separation from the carrier substrate.

On the other hand, the touch sensor of the present invention is prepared in such a manner that a process is performed on the photo-alignment separation film having two functions of the alignment film and the separation film, so that the separated upper plate is not required. Thus, the touch sensor has a significantly reduced thickness by eliminating three or more layers.

2 to 4 are schematic cross-sectional views respectively illustrating an LCD upper panel integrated touch sensor according to an embodiment of the present invention.

The light alignment separation film 10 serves two roles of an alignment film and a separation film, and can be prepared by applying a composition for forming a photo alignment separation film to a carrier substrate.

The composition for forming the photo-alignment separation membrane may include an alignment agent, a photoinitiator, and an organic solvent which are generally used in the related art.

The alignment agent may include any of the alignment agents typically used in the related art without any particular limitation. For example, a polyacrylate polymer, a polyaminic acid, a polyamidene polymer or a polymer containing a cinnamate group can be used as an alignment agent. It is preferable to use a polyimine polymer or a polymer containing a cinnamate group, and more preferably a polymer containing a cinnamate group. The polymer used as the alignment agent may have a weight average molecular weight ranging from 10,000 to 500,000, but it is not limited to this case.

The photoinitiator may include any photoinitiator generally used in the related art without any particular limitation. For example, a triazine compound, an acetophenone compound, a biimidazole compound, an anthraquinone compound, a benzoin compound, a benzophenone compound, or a 9-oxosulfuric acid can be used. A compound, an anthraquinone compound, and the like, but it is not limited to this case.

The triazine compound may include, for example, 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine; 2,4-bis(trichloro) Methyl)-6-(4-methoxynaphthyl)-1,3,5-triazine; 2,4-bis(trichloromethyl)-6-mallowyl-1,3,5-triazine 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-triazine; 2,4-bis(trichloromethyl)-6-[ 2-(5-methylfuran-2-yl)vinyl]-1,3,5-triazine; 2,4-bis(trichloromethyl)-6-[2-(furan-2-yl)ethylene 1,1,3,5-triazine; 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)vinyl]-1, 3,5-triazine; 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)vinyl]-1,3,5-triazine; Similar.

The acetophenone compound may include, for example, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one; benzyldimethylketal; 2-hydroxy-1 -[4-(2-hydroxyethoxy)phenyl]-2-methylpropan-1-one; 1-hydroxycyclohexyl phenyl ketone; 2-methyl-1-(4-methylphenylthio) -2-morpholinylpropan-1-one; 2-benzyl-2-dimethylamino-1-(4-morpholinylphenyl)butan-1-one; 2-hydroxy-2-methyl Oligomer of 1-[4-(-1methylvinyl)phenyl]propan-1-one; 2-methyl-2-amino (4-morpholinylphenyl)ethan-1-one ; 2-ethyl-2-amino (4-morpholinylphenyl) ethyl-1-one; 2-propyl-2-amino (4-morpholinylphenyl) ethyl-1-one; -butyl-2-amino(4-morpholinylphenyl)ethan-1-one; 2-methyl-2-amino(4-morpholinylphenyl)propan-1-one; 2-A 2-amino-(4-morpholinylphenyl)butan-1-one; 2-ethyl-2-amino(4-morpholinylphenyl)propan-1-one; 2-ethyl- 2-amino(4-morpholinylphenyl)butan-1-one; 2-methyl-2-methylamino(4-morpholinylphenyl)propan-1-one; 2-methyl-2 - dimethylamino (4-morpholinylphenyl) propan-1-one; 2-methyl-2-diethylamino (4-morpholinylphenyl) propan-1-one; and the like.

The biimidazole compound may include, for example, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole; 2,2'-bis(2,3- Dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole; 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra(alkoxy) Phenyl)biimidazole; 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetrakis(trialkoxybenzene) Bisimidazole; an imidazole compound having a phenyl group at a 4,4', 5,5' position substituted by an alkoxycarbonyl group; and the like. Among them, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole and/or 2,2'-bis (2,3-di) are preferably used. Chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole.

The hydrazine compound may include, for example, 0-ethoxycarbonyl-α-oxyimine-1-phenylpropan-1-one.

The benzoin compound may include, for example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, and the like.

The benzophenone compound may include, for example, benzophenone, methyl 0-benzylidenebenzoate, 4-phenylbenzophenone, 4-benzylidene-4'-methyldiphenylsulfide Ether, 3,3',4,4'-tetrakis(t-butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, and the like.

9-oxosulfur [ Compounds may include, for example, 2-isopropyl 9-oxosulfur 2,4-diethyl 9-oxosulfur 2,4-dichloro 9-oxosulfur , 1-chloro-4-propoxy 9-oxosulfur And similar.

The ruthenium compound may include, for example, 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 2-ethyl-9,10 - Diethoxy hydrazine, and the like.

In addition, 2,4,6-trimethylbenzoyldiphenyl phosphinoxide, 10-butyl-2-chloroacridone, 2-methylindole醌, benzyl, 9-10-phenanthrenequinone, camphorquinone, methyl phenylchlioxylate, ferrocene compound, and the chain described in Japanese Unexamined Patent Application Publication No. Publication No. 2002-544205 A photopolymerization initiator for the transfer group, and the like.

The organic solvent may include any organic solvent generally used in the related art without any particular limitation. For example, the following may be used alone or in combination with at least two of them Or more than two: ethylene glycol monoalkyl ether, such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, etc.; diethylene glycol dioxane Ether ether, such as diglyme, diethylene glycol diethyl ether, diethylene glycol ethyl ether, diethylene glycol dipropyl ether, diethylene glycol butyl ether, etc.; ethylene glycol alkyl ether acetate, such as Methyl cellosolve acetate, ethyl cellosolve acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monoethyl ether acetate, etc.; alkylene glycol alkyl ether acetate, such as Propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, methoxypentyl acetate, etc.; propylene glycol monoalkyl ether, such as Propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, etc.; propylene glycol dialkyl ether, such as propylene glycol dimethyl ether, propylene glycol diethyl ether, propylene glycol methyl ether, propylene glycol dipropyl ether, propylene glycol Ether, propylene glycol ethyl ether, etc.; propylene glycol alkyl ether propionate, such as propylene glycol methyl ether propionate, propylene glycol diethyl ether propionate, Glycol propyl ether propionate, propylene glycol butyl ether propionate, etc.; butanediol monoalkyl ether, such as methoxybutanol, ethoxybutanol, propoxybutanol, butoxybutanol, etc. Etiso; butanediol monoalkyl ether acetate, such as methoxybutyl acetate, ethoxybutyl acetate, propoxybutyl acetate, butoxybutyl acetate, etc. Butane; monobutyl ether propionate such as methoxybutyl propionate, ethoxybutyl propionate, propoxy butyl propionate, butoxybutyl propionate, etc. Dipropylene glycol dialkyl ether, such as dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, dipropylene glycol methyl ether, etc.; aromatic hydrocarbons such as benzene, toluene, xylene, 1,3,5-trimethylbenzene, etc. Ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone, cyclohexanone, etc.; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, B Glycols, glycerols, etc.; esters such as methyl acetate, ethyl acetate, propyl acetate, butyl acetate, 2-hydroxyethyl propionate, 2-hydroxy-2-methylmethylpropionate 2-hydroxy-2-methyl B Propionate, acetate, hydroxymethyl, hydroxyethyl acetate, hydroxyethyl butyl acetate, methyl lactate, ethyl lactate, propyl lactate Butyl acrylate, 3-hydroxymethyl propionate, 3-hydroxyethyl propionate, 3-hydroxypropyl propionate, 3-hydroxybutyl propionate, 2-hydroxy-3-methylmethyl Butyrate, methoxymethyl acetate, methoxyethyl acetate, methoxypropyl acetate, methoxybutyl acetate, ethoxymethyl acetate, B Oxyethyl acetate, ethoxypropyl acetate, ethoxybutyl acetate, propoxymethyl acetate, propoxyethyl acetate, propoxypropyl Acid ester, propoxy butyl acetate, butoxymethyl acetate, butoxyethyl acetate, butoxypropyl acetate, butoxybutyl acetate, 2- Methoxymethylpropionate, 2-methoxyethylpropionate, 2-methoxypropylpropionate, 2-methoxybutylpropionate, 2-ethoxymethylpropane Acid ester, 2-ethoxyethyl propionate, 2-ethoxypropyl propionate, 2-ethoxybutyl propionate, 2-butoxymethyl propionate, 2-butyl Oxyethylethyl propionate, 2-butoxypropyl propionate, 2-butoxybutyl propionate, 3-methoxymethylpropionate, 3-methoxyethylpropionic acid Ester, 3-methoxypropylpropionic acid Ester, 3-methoxybutyl propionate, 3-ethoxymethyl propionate, 3-ethoxyethyl propionate, 3-ethoxypropyl propionate, 3-ethoxy Butyl propionate, 3-propoxymethylpropionate, 3-propoxyethylpropionate, 3-propoxypropylpropionate, 3-propoxybutylpropionate , 3-butoxymethyl propionate, 3-butoxyethyl propionate, 3-butoxypropyl propionate, 3-butoxybutyl propionate, etc.; cyclic ether For example, tetrahydrofuran, piperane, etc.; cyclic esters such as γ-butyrolactone; and the like.

The composition for forming the photo-alignment separation film of the present invention may further include additives such as a filler, a curing agent, a leveling agent, an adhesion promoter, an antioxidant, a UV absorber, an anti-coagulant, a chain transfer agent, and the like. .

In addition, the composition for forming an alignment film described in Japanese Patent Laid-Open Publication No. 2013-238717 and International Patent Publication No. 2012-014915 can also be used herein.

The liquid crystal driving electrode 20 is disposed on the photo-alignment separation film 10.

The liquid crystal driving electrode 20 is an electrode for driving the liquid crystal to be disposed at a lower side thereof when the LCD integrated panel touch sensor of the present invention is applied to an LCD device.

The liquid crystal driving electrode 20 can be any material as long as it is a conductive material without limitation. For example, the electrode may be made of a metal oxide selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc zinc oxide (indium zinc oxide). Indium zinc tin oxide; IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), fluorine tin oxide (FTO), indium tin oxide-silver-indium tin oxide (indium tin oxide-silver-indium tin oxide; ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc tin oxide- Indium zinc tin oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide-silver-aluminum zinc oxide (AZO-Ag-) AZO). These materials may be used singly or in combination of two or more thereof.

The transparent electrode laminate 30 is disposed on the liquid crystal driving electrode 20.

The transparent electrode laminate 30 includes a sensing electrode for detecting touch, and specifically, may include a sensing electrode, and a protective film disposed on the sensing electrode.

The sensing electrode may use any material as long as it is a conductive material without limitation. For example, the electrode may be made of a material selected from the group consisting of metal oxides of indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide. (AZO), gallium zinc oxide (GZO), fluorine tin oxide (FTO), indium tin oxide-silver-indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO) ), indium zinc tin oxide - Silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum oxide zinc-silver-alumina zinc (AZO-Ag-AZO); a metal selected from the group consisting of gold (Au), silver ( Ag), copper (Cu), molybdenum, and Ag-Pd-Cu alloy (APC); metal nanowires selected from the group consisting of gold, silver, copper And lead; a carbon-based material selected from the group consisting of carbon nanotubes (CNTs) and graphene; and a conductive polymer material selected from the group consisting of: poly(3) , (4-(ethylenedioxythiophene); PEDOT) and polyaniline (PANI). These materials may be used singly or in combination of two or more thereof.

The sensing electrode may be formed of two or more layers as necessary, and includes a second insulating film disposed therebetween.

The second insulating film functions to electrically insulate the plurality of layers of the sensing electrode from each other, and can be made of an organic or inorganic insulating film material known in the related art without limitation.

The protective film functions as a protective sensing electrode and can be made of an organic or inorganic protective film material known in the related art, but it is not limited to this case.

The touch sensor of the present invention integrated with the upper panel of the liquid crystal display (LCD) panel may further include a first insulating film 40 disposed between the liquid crystal driving electrode 20 and the transparent electrode laminate 30.

The first insulating film 40 functions to electrically separate the liquid crystal driving electrode 20 and the transparent electrode laminate 30 from each other and to protect the liquid crystal driving electrode 20 and the sensing electrode.

The first insulating film 40 may be made of the same material as the second insulating film 20 described above.

Touch sensor for integrating the upper panel of a liquid crystal display (LCD) panel of the present invention The polarizing plate 50 disposed on the transparent electrode laminate 30 may be further included.

The polarizing plate 50 may include a polarizer and a protective film adhered to at least one surface thereof.

The polarizer may be a polarizer prepared by a process including steps such as expansion, dyeing, crosslinking, stretching, rinsing, drying, and the like, which is generally used in the related art.

The type of the polarizer forming film is not particularly limited as long as it may be dyed by a dichroic material such as iodine, and may include, for example, a polyvinyl alcohol film, a dehydrated polyvinyl alcohol film, a dehydrochlorinated polyethylene. An alcohol film, a polyethylene terephthalate film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film, a cellulose film, and/or a partially saponified film thereof, or the like. Among them, a polyvinyl alcohol film is preferable in terms of an excellent effect of enhancing the uniformity of polarity in the plane and an excellent dyeing affinity for iodine.

The protective film used herein may be any film as long as the film has excellent properties such as transparency, mechanical strength, thermal stability, moisture resistance property, isotropic property or the like. Specifically, the following may be used: a polyester film such as polyethylene terephthalate, ethyl isophthalate, polybutylene terephthalate or the like; a cellulose film such as two Acetyl cellulose and triethylene fluorene cellulose; polycarbonate film; acrylic film, such as polymethyl (meth) acrylate, polyethyl (meth) acrylate, etc.; styrene film, such as polystyrene , acrylonitrile-styrene copolymer, etc.; polyolefin film, such as cycloolefin, cycloolefin copolymer, polynorbornene, polypropylene, polyethylene, ethylene-propylene copolymer, etc.; vinyl chloride film; polyamine Membrane, such as nylon, aromatic polyamine, etc.; quinone imine film; ruthenium film; polyether ketone film; polyphenylene sulfide film; vinyl alcohol film; vinylidene chloride film; vinyl butyral film; Acrylate film; polyoxymethylene film; urethane film; epoxy film; film; and the like. In detail, considering the polarity properties or durability, the above Among the compounds, a cellulose film which is saponified by an alkali metal or the like is preferably used. Further, the protective film may also have an optical compensation function such as a delay function.

The protective film can be adhered to the polarizer via an adhesive. The adhesive may be any aqueous or UV adhesive known in the related art without limitation.

The touch sensor of the integrated liquid crystal display (LCD) panel upper panel of the present invention having the above configuration can have a significantly reduced thickness, and thus is preferably applied to a thin film LCD device such as a flexible LCD device.

<Method for manufacturing a touch sensor integrated with a top panel of a liquid crystal display (LCD) panel>

Still further, the present invention provides a method for fabricating a touch sensor that integrates a top panel of a liquid crystal display (LCD) panel.

5 and 6 are views schematically illustrating a process for fabricating a touch sensor incorporating a top panel of a liquid crystal display (LCD) panel in accordance with an embodiment of the present invention. Hereinafter, the method of the present invention will be described in detail with reference to FIGS. 5 and 6.

First, as illustrated in FIG. 5(a), the photo-alignment separation film 10 is formed on the carrier substrate 60.

The carrier substrate 60 may be made of any material without any limitation as long as it provides an appropriate strength having little influence on heat and chemical treatment, so that the substrate is not easily bent or distorted during processing, but can be fixed. For example, glass, quartz, tantalum wafer, SUS, or the like can be used, and glass is preferably used.

The photoalignment separation membrane 10 can be prepared by applying the above composition for forming a photo-alignment separation membrane to the carrier substrate 60 and performing photoalignment by photocuring the composition.

The method of application is not subject to any particular limitation, but may include any of the knowledge in the related art. What are known methods, for example, slit coating, knife coating, spin coating, casting, micro gravure coating, gravure coating, bar coating, roll coating, wire bar coating, dip coating, spray coating, Screen printing, gravure printing, flexographic printing, lithography, inkjet coating, dispenser printing, nozzle coating, capillary coating, and the like.

When the composition for forming the photo-alignment separation film comprises a cinnamate-based polymer as an alignment agent, it is preferred to use the touch panel for manufacturing the upper panel of the integrated liquid crystal display (LCD) panel of the present invention. The method of the detector has a whole process temperature of 240 ° C or less. If the process temperature exceeds 240 ° C, the photo-alignment separation membrane 10 may not be easily peeled off from the carrier substrate 60 due to the chemical reaction between the photo-alignment separation membrane 10 and the carrier substrate 60.

When the composition for forming the photo-alignment separation film comprises a polyimine polymer as an alignment agent, it is preferred to first apply a decane coupling agent to the carrier in terms of enhancing adhesion, planarization, and surface tension control. The substrate 60 removes hydrophilic functional groups from the surface of the carrier substrate 60, and then applies a composition for forming a photo-alignment separation film thereto. The decane coupling agent can be applied by dilution with an ethanol solvent.

Further, when the composition for forming the photo-alignment separation film comprises a polyimine polymer as an alignment agent, it is preferable to use the touch panel for manufacturing the upper panel of the integrated liquid crystal display (LCD) panel of the present invention. The method of the detector has a whole process temperature of 240 ° C or less. If the process temperature exceeds 240 ° C, problems such as yellowing of the photo-alignment separation film 10 can be caused.

Light alignment can occur by photocuring. In this step, the alignment treatment can be performed by irradiating polarized UV light having a wavelength range of 150 nm to 450 nm. In this case, the intensity of the exposed light may be from about 500 mJ/cm ² to 5 J/cm ² , and preferably from about 50 mJ/cm ² to 10 J/cm ² .

The UV light may be a polarized UV light selected from the group consisting of UV light polarized by passing UV light through or by the following: (1) Anisotropic dielectric material is applied to, for example, a polarizing device for a substrate on a surface of a transparent substrate of quartz glass, soda lime glass, or alkali-free lime glass; (2) a polarizing plate on which fine aluminum or metal wires are deposited; or (3) reflection using quartz glass Brewster polarizing equipment.

Next, as illustrated in FIG. 5(b), the liquid crystal drive electrode 20 is formed on the photo-alignment separation film 10.

The liquid crystal driving electrode 20 can be made of the above metal oxide material.

The method for forming the liquid crystal driving electrode 20 is not particularly limited, but may include any conventional methods known in the related art, such as physical deposition, chemical deposition, plasma deposition, plasma polymerization, thermal deposition, thermal oxidation, Amphoteric oxidation, cluster ion beam deposition, screen printing, gravure printing, flexographic printing, lithography, inkjet coating, dispenser printing, and the like.

Thereafter, the transparent electrode laminate 30 is formed on the liquid crystal driving electrode 20.

The transparent electrode laminate 30 includes a sensing electrode for detecting touch, and specifically, may include a sensing electrode, and a protective film disposed on the sensing electrode.

The sensing electrode may be made of a material such as the above metal oxide, metal, metal nanowire, carbon material, conductive polymer material, and the like.

The method for forming the sensing electrode is not particularly limited, and can be formed, for example, by the same method as the liquid crystal driving electrode 20 described above.

The protective film functions as a protective sensing electrode and can be made of an organic or inorganic protective film material known in the related art, but it is not limited to this case.

The method for forming the protective film is not particularly limited, but may include related techniques Any of the conventional methods known in the art, for example, slit coating, knife coating, spin coating, casting, micro gravure coating, gravure coating, bar coating, roll coating, wire bar coating , dip coating, spray coating, screen printing, gravure printing, flexographic printing, lithography, inkjet coating, dispenser printing, nozzle coating, capillary coating, and the like.

The sensing electrode may be formed of two or more layers as necessary, and includes a second insulating film disposed therebetween.

The second insulating film may be made of an organic or inorganic protective film material known in the related art.

The method for forming the second insulating film is not particularly limited, and can be formed, for example, by the same method as the above protective film.

The method for manufacturing the touch sensor of the integrated liquid crystal display (LCD) panel upper panel of the present invention may further comprise the step of forming a first insulation on the liquid crystal driving electrode 20 before forming the transparent electrode laminate 30. Film 40.

5 and 6 illustrate the state in which the first insulating film 40 is formed before the formation of the transparent electrode laminate 30, but it is not limited to this case.

The first insulating film 40 may be formed of the same material as the above-described second insulating film, and the preparation method thereof is not particularly limited, but may be formed by the same method as the above-described second insulating film.

Next, as illustrated in FIG. 6(f), the light distribution separation film 10 is separated from the carrier substrate 60.

When the light distribution separation film 10 is separated from the carrier substrate 60, a touch sensor including the following: a light alignment separation film 10; and a liquid crystal disposed on the light distribution separation film 10 can be obtained. The driving electrode 20; and the transparent electrode laminate 30 disposed on the liquid crystal driving electrode 20.

Preferably, the photo-alignment separation film 10 has a peel strength of 1 N/25 mm or less with respect to the carrier substrate 60 in terms of suppressing occurrence of tearing or cracking in the touch sensor during peeling.

If necessary, the method for manufacturing the touch sensor of the integrated liquid crystal display (LCD) panel upper panel of the present invention may further comprise the step of adhering the polarizing plate 50 to the transparent electrode laminate 30, as shown in FIG. (e) stated.

The adhesion of the polarizing plate 50 may be performed after the step of separating the light-aligning separation membrane 10 or before the step of separating the light-aligning separation membrane 10.

FIG. 6 illustrates a state in which the polarizing plate 50 is adhered before the light distribution separation film 10 is separated from the carrier substrate 60, but it is not limited to this case.

The polarizing plate 50 includes a polarizer and a protective film adhered to at least one surface thereof, and the polarizer and the protective film may be made of the above materials.

The polarizing plate 50 can be adhered to the transparent electrode laminate 30 via a glue or an adhesive. Any binder or adhesive can be used without any limitation, including any aqueous or UV adhesive or adhesive known in the art.

As described above, preferred specific examples are proposed to more specifically describe the present invention. However, the following examples are given to illustrate the invention, and it is obvious to those skilled in the art that various changes and modifications may be made within the scope and spirit of the invention. Such changes and modifications are appropriately included in the scope of the appended claims.

10‧‧‧Light alignment film

20‧‧‧LCD drive electrode

30‧‧‧Transparent Electrode Laminate

Claims (11)

A touch sensor integrated with a liquid crystal panel (LCD) upper plate, comprising: a light alignment separation film; a liquid crystal driving electrode disposed on the light alignment separation film; and a transparent electrode laminate disposed thereon The liquid crystal is driven on the electrode. A touch sensor integrated with an upper panel of an LCD according to claim 1, wherein the photo-alignment separation film comprises a polyimine polymer or a polymer comprising a cinnamate group. The touch sensor integrated with the upper panel of the LCD of claim 1, further comprising: a first insulating film disposed between the liquid crystal driving electrode and the transparent electrode laminate. The touch sensor integrated with the upper panel of the LCD according to claim 1, wherein the transparent electrode laminate comprises a sensing electrode, and a protective film disposed on the sensing electrode. A touch sensor integrated with an upper panel of an LCD according to claim 1, further comprising a polarizing plate disposed on the transparent electrode laminate. A liquid crystal display (LCD) device comprising a touch sensor integrated with an upper panel of an LCD according to any one of claims 1 to 5. A method for manufacturing a touch sensor integrated with an upper panel of an LCD, comprising: forming a photo-alignment separation film on a carrier substrate; forming a liquid crystal driving electrode on the photo-alignment separation film; and on the liquid crystal driving electrode Forming a transparent electrode laminate; and separating the light alignment separation film from the carrier substrate. A method for manufacturing a touch sensor integrated with an upper panel of an LCD, as claimed in claim 7, wherein the method for forming a polyimine containing polymer or comprising a cinnamate group is used. The photo-alignment separation membrane is prepared by applying a composition of a light-aligning separation membrane of a polymer to the carrier substrate and curing the composition. A method for manufacturing a touch sensor integrated with an upper panel of an LCD according to claim 7, wherein a decane coupling agent is applied to the carrier substrate and is used to form a polymer comprising a polyimine. The composition of the light-aligning separation membrane is applied to the carrier substrate and the composition is cured to prepare the photo-alignment separation membrane. The method for manufacturing a touch sensor integrated with an upper panel of an LCD according to claim 7 , further comprising: forming a first insulation on the liquid crystal driving electrode before forming the transparent electrode laminate membrane. The method for manufacturing a touch sensor integrated with an upper panel of an LCD according to claim 7, further comprising: bonding a polarizing plate to the transparent electrode laminate.