KR20210092146A - A touch screen panel, a laminate and an image display device comprising the same - Google Patents

Abstract

The present invention relates to a touchscreen panel comprising a first layer and a second layer on which a touch sensor pattern is formed, and a laminate and an image display device comprising the same, wherein the touchscreen panel has a folding area, the folding area is bent by a bending axis in a first direction, and a width of the first layer in the first direction is longer in length than that of a width of the second layer in the first direction, in the folding area. Therefore, a stress generated during bending or folding can be dispersed in each of the end parts of the first layer and the second layer, cracks are not generated even in repeated bending and folding environments, and a touch sensing sensitivity in the folding area does not decrease.

Description

A touch screen panel, a laminate including the same, and an image display device {A TOUCH SCREEN PANEL, A LAMINATE AND AN IMAGE DISPLAY DEVICE COMPRISING THE SAME}

The present invention relates to a touch screen panel, and more particularly, to a flexible touch screen panel, a laminate including the same, and an image display device.

The touch screen panel is an input device in which a user's command can be input by selecting instructions displayed on a screen such as an image display device with a human hand or an object.

To this end, the touch screen panel is provided on the front face of the image display device and converts a contact position in direct contact with a person's hand or an object into an electrical signal. Accordingly, the instruction content selected at the contact position is accepted as an input signal.

As a method of implementing a touch screen panel, a resistive film method, a light sensing method, and a capacitive method are known. In the double capacitive touch screen panel, when a person's hand or an object is in contact, the conductive sensing pattern is By sensing a change in capacitance formed by other sensing patterns or ground electrodes, the contact position is converted into an electrical signal.

In general, such a touch screen panel is attached to the outer surface of an image display device, such as a liquid crystal display device and an organic light emitting display device, in many cases commercialized. Accordingly, the touch screen panel is required to have high transparency and thin thickness.

In addition, in recent years, a flexible image display device is being developed, and in this case, a touch screen panel attached to the flexible image display device is also required to have a flexible characteristic.

However, since the conventional touch screen panel is designed without considering a flexible use environment, that is, a repetitive bending or folding environment, there is a problem in that a crack occurs in an area where the bending or folding is repeated. .

In this regard, Korean Patent Laid-Open Publication No. 10-2013-0126007 discloses a touch screen panel in which a touch sensing pattern is divided into a plurality of regions based on the bending axis of the folding region and is implemented, but a touch sensing pattern divided into a plurality of regions In this region, the area of the touch sensing pattern is smaller than that of other regions, and thus the sensing sensitivity is lowered.

Republic of Korea Patent Publication No. 10-2013-0126007

An object of the present invention is to provide a touch screen panel including a first layer and a second layer on which a touch sensor pattern is formed.

An object of the present invention is to provide a touch screen panel in which cracks do not occur even in repetitive bending and folding environments, and touch sensing sensitivity in a folding area does not decrease.

An object of the present invention is to provide a laminate and an image display device including the touch screen panel.

The present invention is a touch screen panel including a first layer and a second layer on which a touch sensor pattern is formed, wherein the touch screen panel has a folding area, the folding area is bent by a bending axis in a first direction, and a width in the first direction of the first layer in the region is longer than a width in the first direction of the second layer.

In one embodiment of the present invention, both ends of the first layer in the first direction in the folding area may be more extended than both ends of the second layer in the first direction.

In another embodiment of the present invention, a separation distance between the end of the first layer in the first direction and the end of the second layer in the first direction in the folding region may be 5 μm to 10 mm.

In another embodiment of the present invention, the second layer may be located above or below the substrate.

In another embodiment of the present invention, it comprises further comprising a pressure-sensitive adhesive layer between the first layer and the second layer.

In another embodiment of the present invention, the thickness of the first layer may be 10 to 60㎛.

In another embodiment of the present invention, the first layer is polyethylene terephthalate (PET, polyethyelene terepthalate), cyclo olefine polymer (COP, cyclo olefine polymer), polyimide (PI, polyimide) and cellulose triacetate (TAC, triacetate cellulose) ) may be formed by any one selected from the group consisting of.

In another embodiment of the present invention, the second layer may be a polarizing film.

In another embodiment of the present invention, the touch screen panel may have a plurality of folding areas.

In addition, the present invention provides a laminate and an image display device including the touch screen panel.

In the touch screen panel according to the present invention, the width of the first layer is longer than the width of the second layer in the folding area, so that the stress generated during bending or folding is applied to the ends of the first layer and the second layer, respectively. It can be dispersed, and accordingly, it is possible to implement a touch screen panel in which cracks do not occur even in repetitive bending and folding environments and the touch sensing sensitivity in the folding area does not deteriorate.

1 is a plan view schematically illustrating a first layer of a touch screen panel according to an embodiment of the present invention.
2 is a plan view schematically illustrating a touch screen panel (a second layer is located on top of a first layer) according to an embodiment of the present invention.
3 is a cross-sectional view of the touch screen panel shown in FIG. 2 taken along a bending axis.
4 is a cross-sectional view of the touch screen panel shown in FIG. 2 taken along line A-A'.
5 is a plan view schematically illustrating a touch screen panel (the second layer is located below the first layer) according to an embodiment of the present invention.
6 is a cross-sectional view of the touch screen panel shown in FIG. 5 taken along a bending axis.
7 is a cross-sectional view of the touch screen panel shown in FIG. 5 taken along line B-B'.
8 is a plan view schematically illustrating a touch screen panel according to another embodiment of the present invention.
9 is a plan view schematically illustrating a first layer of a touch screen panel according to another embodiment of the present invention.

The present invention relates to a touch screen panel, wherein in a touch screen panel having a folding area (FA), the width of the first layer in the folding area (FA) is extended longer than the width of the second layer It relates to a screen panel, a laminate including the same, and an image display device.

An embodiment of the present invention provides a touch screen panel including a first layer and a second layer on which a touch sensor pattern is formed, wherein the touch screen panel has a folding area FA, and the folding area FA includes a first A touch bent by a folding axis of the direction, and a width in the first direction of the first layer in the folding area FA is longer than a width in the first direction of the second layer It relates to a screen panel and an image display device including the same. Accordingly, the stress generated during bending or folding can be distributed to each of the end portions of the first layer and the second layer, so that cracks do not occur even in repeated bending and folding environments, and in the folding area FA It is possible to implement a touch screen panel in which the touch sensing sensitivity does not deteriorate.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention is not limited to the embodiments disclosed below and may be implemented in various forms. The present embodiments are provided to complete the disclosure of the present invention, and to fully inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout.

In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When 'including', 'having', 'consisting of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated. Also, when it is said that a part is 'connected' to another part, it includes not only the case where it is 'directly connected', but also the case where it is 'electrically connected' with another element interposed therebetween.

In interpreting the components, it is construed as including an error range even if there is no explicit description. In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'next to', etc., 'right' Alternatively, one or more other components may be positioned between the two parts unless 'directly' is used.

In the description of the embodiments, 'first', 'second', etc. are used to describe various components, but the components are not limited by these terms. These terms are only used to distinguish one component from another. In addition, component names used in the following description may be selected in consideration of ease of writing the specification, and may be different from the component names of the actual product.

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, and technically various interlocking and driving possibilities. In addition, each of the embodiments may be implemented independently of each other or may be implemented together in a related relationship.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the above-described content of the present invention, so the present invention is described in such drawings It should not be construed as being limited only to the matters.

<Touch screen panel>

The touch screen panel of the present invention includes a first layer and a second layer, and has a folding area. In addition, the touch screen panel may have a flat area together with a folding area. Preventing cracks from occurring at the end of the touch screen panel by making the width of the first layer in the first direction longer than the width of the second layer in the first direction in the folding area show the effect.

1 is a plan view schematically illustrating a first layer of a touch screen panel according to an embodiment of the present invention. In FIG. 1, only the first layer 100 is shown among the components of the touch screen panel for convenience of explanation, and the second layer 200 is omitted. 1 , the touch screen panel of the present invention may have a folding area FA and a flat area NFA, and the width in the x-axis direction of the first layer 100 in the folding area FA. It has a length longer than the width in the x-axis direction of the second layer 200 .

In the conventional touch screen panel, the widths of the first layer 100 and the second layer 200 in the x-axis direction have the same length, and both ends of the first layer 100 and the second layer 200 are side by side. formed to be aligned. However, such a conventional touch screen panel has cracks at both ends of the first layer 100 and the second layer 200 positioned in the bending or folding area FA when exposed to a repetitive bending or folding environment. This occurs, and there is a problem in that the cracks generated at the ends grow inward of the first layer 100 and the second layer 200 .

As in a conventional touch screen panel, when both ends of the first layer 100 and the second layer 200 are formed to be aligned side by side, the stress generated during bending or folding is applied to the aligned first layer 100 and It is concentrated at the end of the second layer 200, causing cracks to occur in the corresponding portion.

Accordingly, in the touch screen panel of the present invention, the width in the x-axis direction of the first layer 100 in the folding area FA has a longer length than the width in the x-axis direction of the second layer 200. The problem of crack generation of the conventional touch screen panel is solved, and in this case, at least one end of the first layer 100 in the folding area FA is more extended than the one end of the second layer 200 EA ) will have

That is, in the present invention, in the extended area (or extended area) EA, one end in the x-axis direction of the first layer 100 in the folding area FA is in the x-axis direction of the second layer 200 . means an area that is more extended than one end of

As such, when the first layer 100 has the extended area EA in the folding area FA, the end portion of the first layer 100 may be located more outside than the end portion of the second layer 200 . In addition, the first layer 100 and the first layer 100 and the second layer 200 so that the stress generated when the folding area FA is bent or folded is distributed at the end of the first layer 100 and the end of the second layer 200 , respectively. It is possible to prevent the occurrence of cracks at each end of the second layer 200 .

In addition, the present invention is characterized in that one or both ends of the first layer 100 in the x-axis direction in the folding area FA are extended more than both ends of the second layer in the x-axis direction. can be done with In other words, in the present invention, in the folding area FA, the first layer 100 may include the expansion area EA on one side or both sides in the x-axis direction.

In particular, when the first layer 100 has the extended areas EA on both sides of the folding area FA, it is possible to prevent the occurrence of cracks at both ends of the first layer 100, so that more desirable.

The length of the extended area EA in the x-axis direction, that is, the separation distance between one end of the first layer 100 and one end of the second layer 200 is not particularly limited, but one side of the extended area EA ), may be 5 μm to 10 mm, preferably 10 μm to 5 mm, and more preferably 50 μm to 500 μm. When the length of the extended area EA in the x-axis direction satisfies the above range, stress generated during bending or folding can be more effectively dispersed, and the bezel area of the image display device can be adjusted to an appropriate width, which is preferable. . In particular, when the length of the extended area EA in the x-axis direction exceeds 10 mm, the area of the bezel area increases as the area of the first layer 100 in the folding area FA increases, so that an image is displayed. The proportion of the screen occupied by the device may be lowered.

In relation to, referring to the experimental example results of the present invention, when the first layer 100 has the extended area EA on one side or both sides in the folding area FA, the first layer 100 in which the extended area EA is formed. It can be seen that cracks are prevented from occurring at the end of the layer 100 .

Through this, when the x-axis direction width of the first layer in the folding area has a length longer than the x-axis direction width of the second layer, both ends of the first layer in the x-axis direction in the folding area are the x-axis direction of the second layer It can be seen that cracks can be prevented from occurring at the ends of the touch screen panel when it is extended more than both ends in the direction.

In the present invention, the folding area (or bending area) FA is an area in which the touch screen panel is folded when the image display device is folded, and is in-folding based on the folding axis. -folding) or out-folding.

In the present invention, a bending axis in the x-axis direction is positioned in the folding area FA, and the flat area NFA extends from the folding area FA in the y-axis direction and is perpendicular to the bending axis as an example. The present invention is not limited thereto.

The y-axis direction length of the folding area FA is not particularly limited because it may be different depending on the bending radius R when the image display device is actually folded. For example, the y-axis length of the folding area FA may be at least a length corresponding to 1/2 of the circumference along the bending radius R, and the total length of the touch screen panel in the y-axis direction. It can be up to 100% as a basis.

In the present invention, the flat area (or non-folding area) NFA is an area in which the touch screen panel is not folded when the image display device is folded. That is, the flat area NFA may be an area in which the touch screen panel maintains a flat state when the image display device is folded.

The flat area NFA may be an area located on both sides of the folding area FA, and may be an area located on either side of the folding area FA. That is, the flat area NFA may be an area extending in the y-axis direction with respect to the bending axis. In this case, the folding area FA may be defined between the flat areas NFA, and may be defined on either side of the flat area NFA. For example, when the folding areas FA are defined between the flat areas NFA, when the touch screen panel is in-folded with respect to the bending axis, the flat areas NFA may face each other. there is.

For the first layer 100 included in the touch screen panel of the present invention, a substrate or a film material commonly used in the touch screen panel may be used without particular limitation, and a flexible material may be preferably used. For example, cyclo olefin polymer (COP, cyclo olefine polymer), polyethylene terephthalate (PET polyethyelene terepthalate), polyacrylate (PAR, polyacrylate rubber), polyether imide (PEI, polyether lmide), polyethylene naphthalate (PEN, poly(ethylene naphthalate)), polyphenylene sulfide (PPS, polyphenylene sulfide), polyallylate, polyimide (PI, polyimide), cellulose acetate propionate (CAP, cellulose acetate propionate), polyethersulfone ( PES, polyethersulfone), cellulose triacetate (TAC, triacetate cellulose), polycarbonate (PC, polycarbonate), cyclo olefin copolymer (COC, cyclo olefine copolymer), polymethyl methacrylate (PMMA, polymethyl methacrylate), etc. Preferably, it may be formed of at least one of polyethylene terephthalate (PET, polyethyelene terepthalate), cyclo olefine polymer (COP), polyimide (PI, polyimide), and cellulose triacetate (TAC, triacetate cellulose). there is.

The first layer may have a thickness of 10 to 60 μm, preferably 20 to 50 μm. When the thickness of the first layer satisfies the limited range, it can sufficiently serve as a support layer when generating a touch sensor pattern, and lower the possibility of cracking due to an increase in stress applied to the base layer during bending or folding. It is preferable because it can

Also, in some embodiments, the first layer 100 may refer to a display panel of an image display device on which a touch screen panel is stacked. Also, the first layer 100 may refer to an optical layer or an optical film included in the image display device, such as a retarder or a hard coating layer.

In the touch screen panel of the present invention, a touch sensor pattern 110 is formed on or below the first layer 100 . As an embodiment of the present invention, as shown in FIG. 1 , the touch sensor pattern 110 may be formed on the first layer 100 , and the touch sensor pattern 110 includes a first touch sensor pattern ( 111 ) and a second touch sensor pattern 112 . The first touch sensor pattern 111 and the second touch sensor pattern 112 may be densely formed on the first layer 100 to be regularly formed, and the first touch sensor pattern 111 and the second touch sensor pattern 112 may be formed on a regular basis. The two touch sensor patterns 112 may be separated from each other. The first touch sensor pattern 111 may be formed in a plurality of rows on the first layer 100 , and the second touch sensor pattern 112 may be formed in a plurality of columns on the first layer 100 . However, the present invention is not limited thereto.

The first touch sensor pattern 111 and the second touch sensor pattern 112 may be located on the same layer, but are not limited thereto, and the first touch sensor pattern 111 and the second touch sensor pattern 112 may They may be located on different floors.

Each of the first touch sensor pattern 111 and the second touch sensor pattern 112 may have a rectangular shape or a diamond shape, but is not limited thereto, and may have various shapes to improve the sensitivity of the touch screen panel.

The touch sensor pattern 110 may include a transparent conductive oxide or metal. The transparent conductive oxide may include, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), and the like. The metal is, for example, silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W) ), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), or alloys thereof. there is.

In addition, when a plurality of the touch sensor patterns 110 are included, an insulating layer may be further included to insulate them from each other (not shown). As a material of the insulating layer, an insulating material known in the art may be used without limitation, for example, a photosensitive resin composition or thermosetting resin composition including a metal oxide such as silicon oxide or an acrylic resin may be used. Alternatively, the insulating layer may be formed using an inorganic material such as silicon oxide (SiOx), and in this case, may be formed by deposition, sputtering, or the like.

As shown in FIG. 1 , each of the first touch sensor patterns 111 forming a plurality of rows and the second touch sensor patterns 112 forming a plurality of columns includes a connection line 120 formed on the first layer 100 . ), and an end of the connection line 120 may form a pad part 130 . In addition, the pad part 130 may be connected to an external driving circuit.

The second layer 200 included in the touch screen panel of the present invention may be attached to the first layer 100 through an adhesive layer (not shown). The pressure-sensitive adhesive layer is not particularly limited, but may include an optically transparent adhesive (OCA), an optically transparent adhesive resin (OCR), a pressure-sensitive adhesive (PSA), and the like. In addition, the second layer 200 may be located on top of the first layer 100 as illustrated in FIGS. 2 to 4 , or the first layer 100 as illustrated in FIGS. 5 to 7 . may be located at the bottom of

The second layer 200 of the present invention may be a thin glass layer and/or an optical film commonly used in the field of image display devices, and includes a flexible type.

The thin glass layer may be made of a glass material including silicate. In one embodiment of the present invention, the glass material may further include various materials so as to have excellent durability, surface smoothness, and transparency. For example, the thin glass layer may be formed of, but not limited to, alkali metal-containing glass such as aluminosilicate, borosilicate, boroaluminosilicate, etc., alkali-free glass, or chemically tempered glass, and may be changed to various other glass materials. can be

The chemically strengthened glass is obtained by chemically strengthening ordinary glass and has a stronger strength than ordinary glass. As a method for chemically strengthening common glass, a known method can be used without limitation. Specifically, a method of substituting an atom of a small ionic radius with an atom of a large ionic radius, a method of replacing an atom of a large ionic radius with an atom of a small ionic radius using the viscous flow of glass, a method of using the difference in thermal expansion coefficient and crystal One or more methods selected from among the methods for crystallization may be used.

The thickness range of the thin glass layer may be set to have flexible properties. In addition, the thickness range of the thin glass layer may be set to a thickness range in which a repulsive force does not increase when folded according to the bending radius R of the actual image display device.

The optical film is, for example, cyclo olefin polymer (COP, cyclo olefine polymer), polyethylene terephthalate (PET polyethyelene terepthalate), polyacrylate (PAR, polyacrylate rubber), polyether imide (PEI, polyether lmide), polyethylene or phthalate (PEN, poly(ethylene naphthalate)), polyphenylene sulfide (PPS, polyphenylene sulfide), polyallylate, polyimide (PI, polyimide), cellulose acetate propionate (CAP, cellulose acetate propionate), Polyethersulfone (PES, polyethersulfone), cellulose triacetate (TAC, triacetate cellulose), polycarbonate (PC, polycarbonate), cyclo olefine copolymer (COC, cyclo olefine copolymer), polymethyl methacrylate (PMMA, polymethyl methacrylate) and the like, preferably polyethylene terephthalate (PET, polyethyelene terepthalate), cyclo olefine polymer (COP), and polyimide (PI, polyimide).

In addition, the second layer 200 may be an optical film included in an image display device, such as a retarder, a hard coating layer, a protective film, a low-reflection layer, an anti-reflection layer, a liquid crystal coating layer, a polarizing film, a retardation film, and preferably polarized light It may be a film.

The polarizing film is made by stretching a polyvinyl alcohol film and installing a protective layer on at least one surface of a polarizer dyed with iodine or a dichroic dye; A film made by coating an orientation resin such as vinyl alcohol and stretching and dyeing it, and a TAC (triacetyl cellulose)-based or COP (cycloolefin polymer)-based film, but is not limited thereto. The polarizing film may include a polyvinyl alcohol (PVA) protective film, and at least one support may be attached to both sides thereof. The support may include tri acetate cellulose (TAC), cellulous acetate propionate (CAP), wide view-TAC (WV-TAC), and the like. In the present invention, the polarizing film includes both an integrated type and a separate type with the touch screen panel.

The polarizing film may prevent external light reflected from various electrodes or wires including a display panel, a touch screen panel, etc. positioned below or above the polarizing film from being viewed. That is, the light incident from the outside into the image display device, passing through the polarizing film, reflected from the electrode or wiring below it, and entering the polarizing film again causes destructive interference with the light just incident on the polarizing film from the outside, so that it is not visually recognized from the outside. may not be

The polarizing film may be a circularly polarizing film, and in this case, it may include a linear polarizer and a quarter wave plate.

The second layer 200 may include a pressing part hole (not shown) exposing the pad part 130 of the touch screen panel.

2 to 4 are schematic plan and cross-sectional views of a touch screen panel according to an embodiment in which the second layer 200 is positioned on top of the first layer 100 .

In the embodiment shown in FIG. 2 , the second layer 200 is positioned on top of the first layer 100 , and both ends of the first layer 100 in the folding area FA are the second layer 200 . It is characterized in that it has an extended area EA that is more extended outward than both ends.

3 is a cross-sectional view of the folding area FA cut along the folding axis of FIG. 2 , wherein both ends of the first layer 100 and both ends of the second layer 200 are on the same plane It can be seen that they are not located and are spaced apart from each other.

4 is a cross-sectional view of the flat area NFA cut along the line A-A' of FIG. 2 , and unlike the folding area FA shown in FIG. 3 , both ends of the first layer 100 and the second It can be seen that both ends of the second layer 200 are located on the same plane.

5 to 7 are schematic plan and cross-sectional views of a touch screen panel according to another embodiment in which the second layer 200 is positioned under the first layer 100 .

In the embodiment shown in FIG. 5 , the second layer 200 is positioned under the first layer 100 , and both ends of the first layer 100 in the folding area FA are the second layer 200 . It is characterized in that it has an extended area EA that is more extended outward than both ends.

6 is a cross-sectional view of the folding area FA cut along the folding axis of FIG. 5 , wherein both ends of the first layer 100 and both ends of the second layer 200 are on the same plane It can be seen that they are not located and are spaced apart from each other with an interval (EA).

FIG. 7 is a cross-sectional view of the flat area NFA cut along the line B-B' of FIG. 5 , and unlike the folding area FA shown in FIG. 6 , both ends of the first layer 100 and the second It can be seen that both ends of the second layer 200 are located on the same plane.

8 is a schematic plan view of a touch screen panel according to another embodiment in which the second layer 200 is located on the first layer 100 .

As shown in FIG. 8 , the touch screen panel of the present invention can be divided into a first extended area EA-1 formed on one side of the first layer 100 and a second extended area EA-2 formed on the other side of the first layer 100 . In addition, the widths of the first extension area EA-1 and the second extension area EA-2 may have the same length or different lengths.

On the other hand, the touch screen panel according to the present invention may have a plurality of bending axes and a plurality of folding areas FA accordingly. In this case, each of the plurality of folding areas FA has an extended area EA at one or both ends of the first layer 100 .

9 is a plan view schematically illustrating a substrate of a touch screen panel according to another embodiment of the present invention. The first layer 100 shown in FIG. 9, unlike FIG. 1, has two folding areas FA, and has two bending axes, that is, a first bending axis-1 and a second bending axis (Folding axis-1). Folding axis-2). In addition, each of the two folding areas FA has an extended area EA at both ends of the first layer 100 . Each of the two folding areas FA may be independently in-folded or out-folded.

<Method for manufacturing touch screen panel>

The present invention includes a method for manufacturing the touch screen panel described above.

A method of manufacturing a touch screen panel of the present invention will be described with reference to FIGS. 1 to 7 described above, and the same reference numerals are given to the same components as in the above-described embodiment, and the same descriptions are omitted. In addition, the method for manufacturing a touch screen panel of the present invention may include all processes commonly available in the art.

Specifically, the method for manufacturing a touch screen panel according to an embodiment of the present invention includes forming a touch sensor pattern 110 on a first layer 100 and laminating a second layer 200, , forming the touch sensor pattern 110 on the first layer 100 includes forming the first layer 100 such that an extended area EA is formed. The forming of the first layer 100 may be a step of cutting the first layer 100 into a desired shape. The second layer 200 may be stacked on or below the first layer 100 .

In addition, the method for manufacturing a touch screen panel according to another embodiment of the present invention includes forming a touch sensor pattern 110 on a first layer 100 and laminating a second layer 200, After laminating the second layer 200 , the method may include forming the first layer 100 to form an extended area EA. The forming of the first layer 100 may be a step of cutting the first layer 100 into a desired shape.

<Laminate body and image display device>

The present invention provides a laminate including the above-described touch screen panel and a window bonded to the touch screen panel through the pressure-sensitive adhesive layer. The window may include a hard coating layer.

It is preferable that an abrasion-resistant layer is laminated on the visual side surface of the hard coating layer in order to improve abrasion resistance or prevent contamination by sebum.

The wear-resistant layer includes a structure derived from a fluorine compound. The fluorine compound preferably has a silicon atom and has a hydrolyzable functional group such as an alkoxy group or a halogen on the silicon atom.

The hydrolyzable functional group may form a coating film by a dehydration condensation reaction, and may also react with active hydrogen on the surface of the substrate to improve adhesion of the abrasion-resistant layer.

When the fluorine compound has a perfluoroalkyl group or a perfluoropolyether structure, it is preferable because it can impart water repellency, and a fluorine-containing polyorganosiloxane compound having a perfluoropolyether structure and a long-chain alkyl group having 4 or more carbon atoms is particularly preferable.

As the fluorine compound, two or more types of compounds may be used. It is preferable to further include a fluorinated organosiloxane compound containing an alkylene group having 2 or more carbon atoms and a perfluoroalkylene group.

The thickness of the wear-resistant layer is, for example, 1 to 20 nm. Further, the wear-resistant layer has water repellency, and the water contact angle is, for example, 110 to 125°. The contact angle hysteresis and the dynamic contact angle measured by the sliding contact angle measurement method are 3 to 20° and 2 to 50°, respectively.

Furthermore, as a wear-resistant layer, within the range that does not impair the effects of the present invention, various types of silanol condensation catalysts, antioxidants, corrosion inhibitors, ultraviolet absorbers, light stabilizers, antibacterial agents, solvents, pigments, flame retardants, antistatic agents, etc. You may include an additive.

The abrasion-resistant layer and the hard coat layer may have a primer layer interposed therebetween. The primer agent includes, for example, a primer agent such as an epoxy compound of an ultraviolet curing agent, a thermosetting agent, a moisture curing agent, or a two-component curing agent.

Moreover, as a primer agent, a polyamic acid may be used and a silane coupling agent may be used. The thickness of the primer layer is, for example, 0.001 to 2 μm.

As a method of manufacturing a wear-resistant layer-hard coat laminate, a composition containing a fluorine-based compound (for abrasion-resistance coating) after forming a primer layer by applying, drying, and curing the primer agent as necessary on the hard coating layer composition) may be applied and dried to form a wear-resistant layer. As a coating method, for example, a dip coating method, a roll coating method, a bar coating method, a spin coating method, a spray coating method, a die coating method, a gravure coating method, etc. can be mentioned. In addition, before applying the primer agent or the composition for abrasion-resistant coating, it is preferable to perform a hydrophilization treatment such as a primer treatment, corona treatment, or ultraviolet treatment on the coated surface.

The wear-resistant layer-hard coat laminate may be formed directly on the window, or laminated on a separate transparent substrate may be bonded to the window using an adhesive or an adhesive.

In addition, the present invention provides an image display device including the above-described touch screen panel.

In the present invention, the configuration of the image display device may include all configurations commonly available in the art. For example, the image display device may further include a window and/or a display panel in addition to the above-described touch screen panel, and the arrangement order of the touch screen panel, the window, and the display panel is not particularly limited. For example, the touch screen panel may be inserted between the window and the display panel of the image display device. In this case, an adhesive layer may be positioned between the touch screen panel and the window or between the touch screen panel and the display panel, and the window or the display panel may be bonded to the touch screen panel through the adhesive layer, respectively. The pressure-sensitive adhesive layer may be applied in the same manner as described in the touch screen panel.

The display panel may be a liquid crystal display (LCD) panel, a field emission display (FED) panel, a plasma display panel (PDP), an organic electroluminescence (OLED) panel, or the like.

The image display device according to the present invention distributes stress generated during bending or folding, so that cracks do not occur even in repetitive bending and folding environments, and the touch sensing sensitivity in the folding area does not decrease. Therefore, the image display apparatus of the present invention is particularly suitable for a flexible image display apparatus.

Although not shown in a separate drawing, a flexible image display device having a touch screen function is completed by attaching the touch screen panel to the outer surface of the flexible image display device.

The structure capable of preventing the occurrence of cracks even when the touch screen panel according to the present invention is exposed to repetitive bending or folding environments has been described above. However, the present invention is not limited thereto, and the touch screen panel is applicable to a curved image display device or a flat image display device.

Hereinafter, preferred examples are presented to help the understanding of the present invention, but these examples are merely illustrative of the present invention and do not limit the appended claims. It is apparent to those skilled in the art that various changes and modifications can be made to the embodiments within the scope and spirit of the present invention, and it is natural that such variations and modifications fall within the scope of the appended claims.

Examples and Comparative Examples

1 and 8 , on the first layer 100 having a first extension area EA-1 and a second extension area EA-2 on the left and right sides of the folding area FA, respectively A touch screen panel was manufactured by laminating the second layer 200 on the . In this case, the lengths of each of the first and second extended areas EA-1 and EA-2 in the x-axis direction are shown in Table 1 below.

In Table 1 below, 'sum of extended area' means the sum of the length of the first extended area EA-1 in the x-axis direction and the length of the second extended area EA-2 in the x-axis direction, and the folding area ( FA) is equal to the difference in length between the width of the first layer 100 in the x-axis direction and the width of the second layer 200 in the x-axis direction. That is, when the 'sum of the extended area' has a positive value, the width of the first layer 100 in the x-axis direction in the folding area FA is longer than the width of the second layer 200 in the x-axis direction. .

Test Example: Crack occurrence evaluation

For the touch screen panel manufactured according to the above Examples and Comparative Examples, it was checked whether cracks occurred in each condition of 180° in-folding 100 times, 10,000 times, and 200,000 times repetition. For each of the above conditions, the occurrence of cracks was checked a total of three times and evaluated according to the following criteria, and the results are shown in Table 1 below.

<Crack occurrence evaluation criteria>

◎: No cracks under 180° in-folding 200,000 repetitions

Z: No cracks under the condition of 180° in-folding 10,000 repetitions

△: No cracks in 180° in-folding 100 repetitions

X: Cracked under 180° in-folding 100 repetitions

division EA-1 EA-2 Total extended area (μm) x-axis length (㎛) cracking
Whether x-axis length (㎛) cracking
Whether Example 1 5 △ 35 ○ 40 Example 2 10 ○ 30 ○ 40 Example 3 20 ○ 20 ○ 40 Example 4 0 X 40 ○ 40 Example 5 -One X 41 ○ 40 Example 6 -10 X 50 ◎ 40 Example 7 20 ○ 60 ◎ 80 Example 8 40 ○ 40 ○ 80 Example 9 30 ○ 90 ◎ 120 Example 10 60 ◎ 60 ◎ 120 Example 11 40 ○ 120 ◎ 160 Example 12 80 ◎ 80 ◎ 160 Example 13 50 ◎ 150 ◎ 200 Example 14 100 ◎ 100 ◎ 200 Example 15 60 ◎ 180 ◎ 240 Example 16 120 ◎ 120 ◎ 240 Example 17 15 ○ 485 ◎ 500 Example 18 -10 X 1,010 ◎ 1,000 Example 19 100 ◎ 9,900 ◎ 10,000 Example 20 9 △ 91 ◎ 100 Example 21 49 ○ 51 ◎ 100 Comparative Example 1 0 X 0 X 0

Referring to the results of Table 1, Examples 1 to 1 in which the sum of the extended areas has a positive value, that is, in the folding area, the width in the x-axis direction of the first layer is longer than the width in the x-axis direction of the second layer. In case 21, it can be seen that cracks do not occur at at least one end of the folding area. In addition, both the first extended area EA-1 and the second extended area EA-2 have positive values, that is, in the folding area, both ends of the first layer in the x-axis direction are positive in the x-axis direction of the second layer. In the case of Examples 1 to 3, 7 to 17, and 19 to 21, which are more extended than the ends, it can be seen that cracks do not occur at both ends of the folding area.

In particular, when the x-axis length of the extended region is 10 μm or more, cracks do not occur even under the condition of repeating 180° in-folding 10,000 times, and when the x-axis length of the extended region is 50 μm or more, 180° in-folding It can be seen that cracks do not occur even under the condition of 200,000 repetitions, showing a very good effect.

On the other hand, in the case of Comparative Example 1 in which both ends of the first layer and the second layer are aligned side by side without an extension region, it can be seen that cracks are generated at both ends of the folding region.

100: first floor
110: touch sensor pattern
111: first touch sensor pattern
112: second touch sensor pattern
120: connection line
130: pad part
200: second floor

Claims (15)

A touch screen panel comprising a first layer and a second layer on which a touch sensor pattern is formed,
The touch screen panel has a folding area,
The folding area is bent by the bending axis in the first direction,
In the folding area, the width of the first layer in the first direction has a length longer than the width of the second layer in the first direction, the touch screen panel. The method according to claim 1,
In the folding area, both ends of the first layer in the first direction are wider than both ends of the second layer in the first direction, the touch screen panel. 3. The method according to claim 2,
In the folding area, a distance between the end of the first layer in the first direction and the end of the second layer in the first direction is 5 μm to 10 mm, the touch screen panel. The method according to claim 1,
The second layer is characterized in that located above or below the first layer, a touch screen panel. The method according to claim 1,
The touch screen panel, characterized in that it further comprises a pressure-sensitive adhesive layer between the first layer and the second layer. The method according to claim 1,
The thickness of the first layer is characterized in that 10 to 60㎛, a touch screen panel. The method according to claim 1,
The first layer is any one selected from the group consisting of polyethylene terephthalate (PET, polyethyelene terepthalate), cyclo olefine polymer (COP), polyimide (PI, polyimide) and cellulose triacetate (TAC, triacetate cellulose) A touch screen panel, characterized in that formed in one. The method according to claim 1,
The second layer is a polarizing film, characterized in that the touch screen panel. The method according to claim 1,
The touch screen panel is characterized in that it has a plurality of folding areas, a touch screen panel. The touch screen panel of any one of claims 1 to 9; and
A laminate comprising a window bonded to the touch screen panel through an adhesive layer. 11. The method of claim 10,
The laminate is characterized in that the outermost surface of the visual recognition side is an abrasion-resistant layer. 12. The method of claim 11,
The abrasion-resistant layer is a laminate, characterized in that the hard coating layer is further present on the surface opposite to the viewing side. An image display device comprising the touch screen panel of any one of claims 1 to 9. 14. The method of claim 13,
a window bonded to one surface of the touch screen panel through an adhesive layer; and
The image display device, characterized in that it further comprises a display panel bonded to the other surface of the touch screen panel through a pressure-sensitive adhesive layer. 15. The method of claim 14,
The window is characterized in that provided with a hard coating film, an image display device.

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