KR101938515B1 - Protective film for covering a curved surface of a portable display, device of adhering the protective films to the curved surface of the portable display, and method of adhering the protective film to the curved surface using the device - Google Patents

Abstract

A curved cover protective film for protecting a display area of a portable display device including a flat display area and a curved display area is disclosed. The curved cover protective film has a protective film member having a planar region corresponding to the flat display region and a curved region corresponding to the curved display region, and an adhesive layer for adhering the entire area of the lower surface of the protective film member to the display region of the portable display device Respectively.

Description

TECHNICAL FIELD [0001] The present invention relates to a curved cover protective film, a device for attaching the curved cover protective film, and a method of attaching the curved cover protective film, and a method of attaching the curved cover protective film to the curved cover protective film. SURFACE USING THE DEVICE}

The present invention relates to a curved cover protective film applied to a portable display device having a flat display area and a curved display area, an apparatus for attaching the curved cover protective film, and a method for attaching a curved cover protective film using the same.

In the case of a portable display device including a touch screen type display such as a smart phone, information is input through a touch of a screen of a user, so there is a high risk that the display area of these devices may be damaged by being struck, pressed, or scratched. In order to protect the portable display device from such damage, various protective films have been applied. In recent years, reinforced glass protective films having high hardness and excellent protection against external impact have been widely used.

On the other hand, portable display devices having a curved display area as well as a flat display area have been put on the market in recent years as the external appearance of a mobile device has changed. There is a limitation that a protective film applied to a portable display device having only a conventional flat display area can not be applied to a portable display device including such a curved surface area as it is. For example, even if the reinforcement protective film is manufactured by molding the reinforced protective film according to the curved surface of the portable display device and applying the reinforced protective film to the portable display device, the curvature of the portable display device itself is different not only depending on each product, The curvature of the film is also different for each product, so that the curved surface protective film can not be applied to the portable curved surface display device in the conventional method.

Therefore, it is urgently required to develop a curved cover protective film applicable to a portable display device having a curved display area.

It is an object of the present invention to provide a flat display area and a curved area to be applied to a portable display device having a flat display area and a curved display area, and a flat area as well as a curved area can be stably attached to a display area of a portable display A protective film for a curved cover.

Another object of the present invention is to provide an apparatus for attaching a curved cover protective film for attaching the curved cover protective film to the portable display device.

It is still another object of the present invention to provide a method for attaching the cover protective film to the portable display device.

The curved cover protective film according to the embodiment of the present invention can protect the display area of the portable display device including the flat display area and the curved display area. Wherein the curved cover protective film has a curved surface area corresponding to the curved surface display area and including a flat area corresponding to the flat display area and a curved surface extending from an edge of the flat area, And a flowable adhesive composition is spread between the entire area of the lower surface of the protective film member and the display area of the portable display device and then cured to form an entire area of the lower surface of the protective film member, And an adhesive layer adhering to the display area.

In one embodiment, the adhesive composition may have a viscosity of about 1 to 500 cps.

In one embodiment, the adhesive composition may comprise an ultraviolet (UV) polymerizable oligomer and a photopolymerization initiator. The ultraviolet polymerizable oligomer may include at least one selected from the group consisting of a modified acrylic oligomer, a polyester oligomer, an epoxy oligomer, a urethane oligomer, a polyether oligomer, a polyacrylic oligomer and a silicone acrylate oligomer, The photopolymerization initiator is composed of a benzoin ether compound, an amine compound, an a-hydroxy ketone compound, a phenyl glyoxylate compound, and an acrylic phosphine oxide (acyl phosphine oxide) compound One or more selected from the group.

In one embodiment, the adhesive composition may further comprise a diluent, wherein the diluent is selected from the group consisting of styrene monomers, methylmethacrylate monomers, ethylmethacrylate monomers, n-butyl methacrylate N-butylmethacrylate monomer, iso-butylmethacrylate monomer, t-butylmethacrylate monomer, vinylchloride monomer, vinyl acetate monomer, acrylonitrile monomer, Acrylate monomer, acrylonitrile monomer, 2-ethylhexylmethacrylate monomer, laurylmethacrylate monomer, methylacrylate monomer, ethylylacrylate monomer, n-butyl acrylate, N-butylacrylate monomer, iso-butylacrylate monomer, 2-ethylhexylacrylate, ate monomer, an ethylene monomer, and an octadecylmethacrylate monomer; Or acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, But are not limited to, di-methylaminoethylmethacrylate, t-butylaminoethylmethacrylate, diethylaminoethylmethacrylate, glycidylmethacrylate, 2-hydroxyethyl 2-hydroxypropylacrylate, itaconic acid, maleic acid, acrylamide, and N-methylol acrylamide (N-hydroxyethyl acrylate) methylolacrylamide). < / RTI >

In one embodiment, in the adhesive composition, the content of the ultraviolet-curable oligomer is about 50 to 80 wt%, the content of the diluent is about 14 to 49 wt%, the content of the photopolymerization initiator is about 0.5 to 5 wt %. ≪ / RTI >

In an exemplary embodiment, the protective film member may include a protective film layer including the planar region and the curved region; A base film comprising a polymer film covering the entire lower surface of the protective film layer; And an adhesive layer positioned between the protective film layer and the base layer and adhering them. The adhesive layer may adhere the entire area of the lower surface of the base layer to the display area of the portable display device. In this case, an adhesion improving pattern may be formed on the lower surface of the substrate layer, including protrusions and grooves positioned therebetween. In one embodiment, the protrusions may include dot patterns, linear patterns extending in one direction, or a lattice pattern. In one embodiment, the lower surface of the substrate layer on which the adhesion-enhancing pattern is formed may have a surface roughness (Ra) of about 0.1 to 10 mu m.

In one embodiment, the protective film member may further include a water-repellent / oil-repellent pattern formed along the edge of the base layer and formed of a polymer material having water repellency and oil repellency. The water-repellent / oil-repellent pattern may be formed of at least one of PTFE (Polytetrafluoroethylene), PFA (Perfluoroalkoxy), FEP (fluorinated ethylene propylene), ETFE Polyether etherketone (PES), Polyphenylene sulfide (PES), Polyamide (PA), Polyacetal (POM), Polyamide imide (PAI), Polyether sulfone (PES), Polyvinylidene fluoride (PVF) (PEI), PC (Polycarbonate), and PPE (Polyphenylene ether). In one embodiment, the water-repellent / oil-repellent pattern may have a width of 10 to 500 mu m.

In an exemplary embodiment, the protective film member may include a protective film layer including the planar area and the curved area, and the adhesive layer may cover the entire area of the lower surface of the protective film layer, Area. In this case, an adhesion improving pattern may be formed on the lower surface of the protective film layer, including protrusions and grooves positioned therebetween.

In one embodiment, the protective film member may further include a water-repellent / oil-repellent pattern formed along the edge of the protective film layer and formed of a polymer material having water repellency and oil repellency.

In an exemplary embodiment, the protective film member may include a protective film layer including the planar region and the curved region; A base film including a polymer film disposed below the protective film layer to expose an edge region of a lower surface of the protective film layer; And an adhesive layer positioned between the protective film layer and the base layer and adhering them. The adhesive layer may adhere the entire area of the lower surface of the base layer to the display area of the portable display device.

In one embodiment, the protective film member may further include a water-repellent / oil-repellent pattern formed along the edge region of the exposed protective film layer and formed of a polymer material having water repellency and oil repellency.

A method of attaching a curved cover protective film according to an embodiment of the present invention includes the steps of disposing an application plate on a display area of a portable display device having at least one injection hole for injecting a pressure-sensitive adhesive composition into a center portion thereof; Applying the adhesive composition to the display area of the portable display device through the injection hole; Loading the protective film member on the display area of the portable display device to which the pressure-sensitive adhesive composition is applied, thereby diffusing the pressure-sensitive adhesive composition between the portable display device and the protective film member; And curing the adhesive composition.

In one embodiment, the adhesive composition comprises an ultraviolet (UV) polymerizable oligomer, a photopolymerization initiator, and a diluent, and may have a viscosity of about 1 to 500 cps.

In one embodiment, when the protective film member is loaded, the adhesive composition may be diffused and flowed to the entire region between the protective film member and the portable display device through capillary action by the weight of the protective film member.

According to the present invention, a flowable adhesive composition is diffused and flowed between a protective film member and a portable display device to form a layer of a pressure-sensitive adhesive composition, and the protective film member is adhered to the portable display device by curing, Even if the curvature of the display area and the curvature of the curved area of the protective film member are different from each other, the entire area of the protective film member can be stably attached to the portable display device. As a result, there is no problem of lowering the touch sensitivity caused by the air layer formed between the protective film member and the portable display device or degrading the display characteristics. Since the air layer is not formed near the edge of the area between the protective film member and the portable display device due to the self leveling effect of the liquid adhesive composition, the adhesion strength between the protective film member and the portable display device Can be improved.

In addition, in the present invention, the protective film member may be attached to the portable display device by forming an adhesive force improving pattern on the surface of the protective film member which is in direct contact with the adhesive composition and forming a water repellent / oiling pattern along the edge of the surface It is possible to prevent the adhesive composition from flowing out to the outside of the protective film member in the process, so that the protective film member can be stably and easily attached to the portable display device.

1A and 1B are a perspective view and a cross-sectional view illustrating a curved cover protective film according to an embodiment of the present invention.
Fig. 2 is a sectional view for explaining a first embodiment of the film member shown in Figs. 1A and 1B.
3 is a cross-sectional view for explaining a second embodiment of the film member shown in Figs. 1A and 1B.
4 is a cross-sectional view for explaining a third embodiment of the film member shown in Figs. 1A and 1B.
5 is a sectional view for explaining an apparatus for attaching a curved cover protective film according to an embodiment of the present invention.
6 is a plan view for explaining the lower case shown in FIG.
7 is a plan view for explaining the upper case shown in FIG.
8 is a plan view for explaining the coating member shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term "comprises" or "having ", etc. is intended to specify that there is a feature, step, operation, element, part or combination thereof described in the specification, , &Quot; an ", " an ", " an "

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1A and 1B are a perspective view and a cross-sectional view illustrating a curved cover protective film according to an embodiment of the present invention.

1A and 1B, a curved cover protective film 1000 according to an embodiment of the present invention is applied to a portable display device 10 including a curved surface display area as well as a flat display area, for example, a smart phone So that the entire display area of the portable display device 10 can be protected.

In one embodiment, the curved cover protective film 100 according to an embodiment of the present invention may include a protective film member 110 and an adhesive layer 120.

The protective film member 110 includes at least one curved surface region C1 and C2 extending from the edge portion of the planar region F and having a substantially flat planar region F positioned at the center of the planar region F, can do. The planar area F and the curved area C1, C2 may be integrally formed.

The planar area F may have a rectangular shape having a pair of opposed long sides and a pair of short sides connecting the long sides and is disposed above the flat display area of the display area of the portable display device 10 And can protect it.

The curved surface regions C1 and C2 extend from each of the long sides of the planar region F to have a constant width and have a first curved surface which is convex upward with respect to the display region of the portable display device 10. [ And may include a region C1 and a second curved region C2. Each of the first curved area area C1 and the second curved area area C2 may have a curvature continuously changing so as not to form a discontinuity at the boundary with the flat area area F, 10, respectively, on the curved surface display areas formed on both sides of the flat display area.

The adhesive layer 120 is positioned between the entire area of the lower surface of the protective film member 110 and the display area of the portable display device 10 corresponding to the entire area of the lower surface of the protective film member 110, Can be attached to the portable display device (10). That is, the adhesive layer 120 is formed not only between the flat display region of the portable display device 10 and the planar region F of the protective film member 110, Can also be located between the curved regions C1 and C2 of the protective film member 110. [ In this specification, the protective film member 110 is attached to the display area of the portable display device 10 or the portable display device 10 by the adhesive layer 120, (Not shown) attached to the display area of the portable display device 10 as well as when the protective film member 110 is directly attached to the display area of the portable display device 10 Is defined as including the case.

When the adhesive layer 120 attaches only a part of the lower surface of the protective film member 110 to the display area of the portable display device 10, the protective film member 110 and the portable display device 10 An air layer is formed in an area where the adhesive layer 120 is not formed to reduce the sensitivity of the portable display device 10 to the touch of the user and the air layer and the adhesive layer The display characteristic of the portable display device 10 may be deteriorated in terms of the user viewing the portable display device 10 through the protective film member 110 due to the difference in optical characteristics of the display device. However, in the present invention, since the entire area of the lower surface of the protective film member 110 is attached to the display area of the portable display device 10 using the adhesive layer 120, Deterioration of the characteristics can be prevented.

In an embodiment of the present invention, the adhesive layer 120 may be formed by applying a flowable adhesive composition onto the display area of the portable display device 10, and then attaching the protective film member 110 to the portable display device 10) to spread the adhesive composition over the entire area of the lower surface of the protective film member 110 by the weight of the protective film member 110, and then curing the adhesive composition have. In one example, the adhesive composition may be cured by photopolymerization or thermal polymerization.

The curvature radius of the curved surface area of the protective film member 110 and the curvature radius of the curved surface display area of the portable display device 10 have different values within the allowable margin for each individual product, The curvature radius of the curved surface area of the portable display device 10 and the curvature radius of the curved surface area of the protective film member 110 applied thereto are different from each other. As a result, when the protective film member 110 is attached to the portable display device 10 by using a known adhesive member such as an adhesive film having no fluidity, The entire surface area can not be attached to the portable display device 10, and an unintended air layer is formed between the protective film member 110 and the display area of the portable display device 10.

However, in the present invention, the adhesive composition having fluidity as described above is spread between the protective film member 110 and the portable display device 10 and then hardened to cure the protective film member 110 to the portable display device 10, it is possible to attach the entire area of the lower surface of the protective film member 110 to the portable display device 10, and as a result, it is possible to prevent the deterioration of the sensitivity and display characteristics of the user touch described above . That is, even if the gap between the protective film member 110 and the portable display device 10 is not constant, the thickness of the adhesive layer 120 may vary to compensate for the gap between the protective film member 110 and the portable display device 10, The whole area of the lower surface of the protective film member 110 can be attached to the portable display device 10.

In one embodiment, the adhesive composition may have a viscosity of about 1 to 500 cps. When the viscosity of the pressure-sensitive adhesive composition is less than 1 cps, the surface tension of the pressure-sensitive adhesive composition is too weak so that the pressure-sensitive adhesive composition passes the area between the protective film member 110 and the portable display device 10, If the viscosity of the pressure-sensitive adhesive composition is more than 500 cps, the flowability of the pressure-sensitive adhesive composition is low, so that only the self-weight of the protective film member 110 may cause the lower surface of the protective film member 110 There is a problem that it does not spread to the whole area. In one embodiment, the viscosity of the adhesive composition preferably has a viscosity of about 10 to 250 cps.

In one embodiment, the adhesive composition may comprise an ultraviolet (UV) polymerizable oligomer and a photopolymerization initiator.

The ultraviolet polymerizable oligomer may include at least one selected from the group consisting of a modified acrylic oligomer, a polyester oligomer, an epoxy oligomer, a urethane oligomer, a polyether oligomer, a polyacrylic oligomer, a silicon acrylate oligomer, Is one selected from a benzoin ether compound, an amine compound, an a-hydroxy ketone compound, a phenyl glyoxylate compound, an acrylic phosphine oxide compound, and the like Or more.

Meanwhile, the pressure-sensitive adhesive composition may further include a diluent. Such a diluent can control the viscosity of the adhesive composition and improve the physical properties of the adhesive layer 120 after curing. The diluent may be selected from the group consisting of styrene monomer, methylmethacrylate monomer, ethylmethacrylate monomer, n-butylmethacrylate monomer, iso-butylmethacrylate monomer, But are not limited to, monomers, t-butylmethacrylate monomers, vinylchloride monomers, vinyl acetate monomers, acrylonitrile monomers, 2-ethylhexylmethacrylate, Butylacrylate monomer, laurylmethacrylate monomer, methylacrylate monomer, ethylylacrylate monomer, n-butylacrylate monomer, iso-butylacrylate monomer, , 2-ethylhexylacrylate monomer, ethylene monomer, octadecylmethacrylate, acrylate monomer, and the like, or may contain one or more selected from the group consisting of acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate (2 -Hydroxypropyl methacrylate, di-methylaminoethylmethacrylate, t-butylaminoethylmethacrylate, diethylaminoethylmethacrylate, glycidyl ethacrylate, But are not limited to, glycidylmethacrylate, 2-hydroxyethylacrylate, 2-hydroxypropylacrylate, itaconic acid, maleic acid, acrylamide, , N-methylolacrylamide, and the like.

On the other hand, the pressure-sensitive adhesive composition may further contain additives such as a photosensitizer, a colorant, a thickener, and a polymerization inhibitor.

In one embodiment, when the polymer composition comprises the ultraviolet-curable oligomer, the diluent, the photopolymerization initiator and the additive, the content of the ultraviolet-curable oligomer may be about 50 to 80 wt%, and the content of the diluent May be about 14 to 49 wt%, the photopolymerization initiator may be about 0.5 to 5 wt%, and the additive may be about 0.5 to 1 wt%.

Hereinafter, the protective film member 110 will be described in detail with reference to FIGS. 2 to 4. FIG.

FIG. 2 is a cross-sectional view for explaining a first embodiment of the protective film member shown in FIGS. 1A and 1B.

Referring to FIG. 2, the protective film member 110A according to the first embodiment of the present invention may include a protective film layer 111A, a base layer 112A, and an adhesive layer 113A .

The protective film layer 110A may be formed of a known glass material or the like and may include a flat area F and a curved area C1 or C2 as described above.

The base layer 112A may be formed of a transparent polymer material such as polyethylene terephthalate (PET), acrylic resin or the like and may include a planar area F and a curved area C1 or C2, And may cover the entire lower surface of the protective film layer 111A.

The adhesive layer 113A is disposed between the protective film layer 111A and the base layer 112A and can adhere them to each other. The material of the adhesive layer 113A is not particularly limited, and known adhesive or adhesive substances can be used without limitation.

In the protective film member 110 having such a structure, the base material layer 112A adhered to the protective film layer 111A by the adhesive layer 113A is formed by the adhesive layer 120 described above, The protective film layer 111A can be attached to the display area of the apparatus 10 and the protective film layer 111A can be prevented from being scattered when the protective film layer 111A is broken.

In one embodiment, an adhesion force improving pattern (not shown) may be formed on the lower surface of the base layer 112A attached to the display area of the portable display device 10. [

The adhesion-enhancing pattern may have a structure in which the protrusions and the grooves positioned therebetween are continuously arranged. For example, the protrusions may include regularly or irregularly formed dot patterns, linear patterns extending in one direction, a lattice pattern, and the like. The method of forming the adhesion-improving pattern is not particularly limited. For example, the adhesion-improving pattern may be formed by a sand blasting process, a dry etching process, a wet etching process, or a molding coating process.

When the adhesive force improving pattern is formed on the lower surface of the base layer 112A contacting the adhesive layer 120 as described above, the surface area of the lower surface of the base layer 112A increases, It is possible to improve the adhesion of the protective film member 110 to the portable display device 10 and improve the surface tension of the adhesive composition in the process of attaching the protective film member 110 to the portable display device 10, ) To the outside can be prevented. In the present invention, since the entire lower surface of the base layer 112A is attached to the portable display device 10 by the adhesive layer 120, the adhesive force improving pattern is formed on the lower surface of the base layer 112A The adhesive force improving pattern may not be visually recognized by the user or a problem of deterioration in display characteristics such as lowering of light transmittance may be avoided.

In one embodiment, the lower surface of the base layer 112A on which the adhesion-enhancing pattern is formed may have a surface roughness (Ra) of about 0.1 to 10 mu m. When the surface roughness of the lower surface of the base layer 112A is less than 0.1 mu m, it is difficult to exert the technical effect described above. When the surface roughness of the lower surface of the base layer 112A exceeds 10 mu m, Not only the thickness of the layer 112A becomes too thick but also the difference in height between the adhesion improving patterns becomes excessively large, thereby preventing the adhesive composition from spreading uniformly and reducing the adhesive force partially.

Meanwhile, in one embodiment of the present invention, the protective film member 110 may further include a water-repellent / oil-repellent pattern 114A having a predetermined width along the edge of the base layer 112A.

The water-repellent / oil-repellent pattern 114A may be formed of a material having both water repellency and oil repellency. If it is a material having both water repellency and oil repellency, it can be used without limitation as the material of the water repellent / oil repellent pattern 114A and is not particularly limited. For example, the water-repellent / oil-repellent pattern 114A may be formed of PTFE (Polytetrafluoroethylene), PFA (Perfluoroalkoxy), FEP (Fluorinated ethylene propylene), ETFE Polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyamide (PA), polyacetal (POM), or the like, or a fluoropolymer such as polyvinylidene fluoride (PVDF), polyvinylidene fluoride Fluoropolymer materials such as PAI (Polyamide imide), PES (Polyether sulfone), PEI (Polyether imide), PC (Polycarbonate) and PPE (Polyphenylene ether).

Since the adhesive composition for forming the adhesive layer 120 of the present invention generally has hydrophilic or hydrophobic properties, the water-repellent / oil-repellent pattern 114A is formed to have a constant width along the edge of the base layer 112A It is possible to more reliably prevent the adhesive composition from flowing out to the outside of the protective film member 110 in the process of attaching the protective film member 110 to the portable display device 10.

In one embodiment, the water-repellent / oil-repellent pattern 114A may have a width of about 10 to 500 mu m. If the width of the water-repellent / oil-repellent pattern 114A is less than 10 mu m, the process cost of forming the water-repellent / oil-repellent pattern 114A may increase, and the technical effect may not be exhibited. The adhesion force between the protective film member 110 and the portable display device 10 is relatively weakened in the region where the water-repellent / oil-repellent pattern 114A is formed, So that the protective film member 110 and the portable display device 10 may be detached at this portion. For example, the water-repellent / oil-repellent pattern 114A is preferably formed to have a width of about 100 to 300 mu m.

3 is a sectional view for explaining a second embodiment of the protective film member shown in Figs. 1A and 1B.

Referring to FIG. 3, the protective film member 110B according to the second embodiment of the present invention may include a protective film layer 111B and a water-repellent / oil-repellent pattern 114B.

The protective film member 110B according to the present embodiment does not include the base layer 112A and the adhesive layer 113A of the protective film member 110A according to the first embodiment shown in FIG. 111B may be directly attached to the portable display device 10 through the adhesive layer 120. [

The protective film layer 111B may be substantially the same as the protective film layer 111A of the protective film member 110 shown in FIG. 2 except that the above-described adhesion force improving pattern (not shown) So that a detailed description thereof will be omitted.

The water-repellent / oil-repellent pattern 114A of the protective film member 110 shown in FIG. 2 is substantially identical to the water-repellent / oil-repellent pattern 114A of FIG. 2 except that the water- The detailed description thereof will be omitted.

4 is a cross-sectional view for explaining a third embodiment of the protective film member shown in Figs. 1A and 1B.

4, the protective film member 110C according to the third embodiment of the present invention includes a protective film layer 111C, a base layer 112C, an adhesive layer 113C, and a water-repellent / oil-repellent pattern 114C .

The protective film member 110C according to the present embodiment is formed such that the base film 112C and the adhesive layer 113C expose the edges of the lower surface of the protective film layer 111C by a predetermined width, And is substantially the same as the protective film member 110 described with reference to FIG. 2 except that the water-repellent / oil-repellent pattern 114C is formed on the exposed lower surface of the protective film layer 114C A detailed description thereof will be omitted.

The base layer 112C and the adhesive layer 113C may expose the edges of the lower surface of the protective film layer 111C by a width of about 10 to 500 mu m and preferably about 100 to 300 mu m.

The adhesive composition for forming the adhesive layer 120 in the process of attaching the protective film member 110C on the portable display device 10 may be applied to the protective film member 110 and the portable display device The surface tension of the adhesive composition is broken when an external object contacts the exposed portion of the adhesive composition, and the adhesive composition is peeled off from the outside of the protective film member 110 There may be a problem that it flows out. This problem is solved by using the apparatus 1000 for attaching a curved cover glass protective film according to an embodiment of the present invention, which will be described with reference to FIGS. 5 to 8, to attach the protective film member 110 to the portable display device 10, The base layer 112C and the adhesive layer 113C are formed so as to expose the edges of the lower surface of the protective film layer 111C with a width of about 10 to 500 mu m as described above The exposed convex portion of the adhesive composition does not protrude to the outside of the protective film layer 111C so that the adhesive composition comes into contact with the curved cover glass protective film adhering apparatus 1000, It is possible to solve the problem of leakage to the outside.

FIG. 5 is a sectional view for explaining an apparatus for attaching a curved cover protective film according to an embodiment of the present invention, and FIGS. 6 to 8 are plan views for explaining a lower case, an upper case, and a coating member shown in FIG.

5 to 8, an apparatus 1000 for attaching a curved cover protective film according to an embodiment of the present invention includes a lower case 1100, an upper case 1200, and an application plate 1300.

The lower case 1100 may include a first support portion 1110 and a first partition wall portion 1120.

The first support part 1110 may have a first upper flat surface having a fixing groove 1111 into which the portable display device 10 can be inserted and fixed and which surrounds the fixing groove 1111, . The fixing groove 1111 may have a shape corresponding to the plane shape of the portable display device 10 and may have a depth smaller than the thickness of the portable display device 10. The portable display device 10 inserted into the fixing groove 1111 may be protruded by a predetermined thickness from the first upper surface of the first supporting portion 1110 while being fixed so as not to flow in the horizontal direction. The shape of the first lower surface of the first support portion 1110 facing the first upper plane is not particularly limited.

The first partition 1120 is disposed to surround the fixing groove 1111 on a first upper plane of the first supporting part 1110 and is arranged at a predetermined height from the first upper plane of the first supporting part 1110 Can be protruded. The first partition wall 1120 may be formed to expose the first upper surface of a predetermined width from the fixing groove 1111 and the fixing groove 1111.

The upper case 1200 may include a second support part 1210 and a second partition part 1220.

The second support portion 1210 may include a second lower surface supported by the first exposed portion of the first upper surface of the first support portion 1110 by the first partition wall 1120, And a second upper plane positioned on the second lower plane, and an opening 1211 for exposing the entirety of the fixing groove 1111 and the portable display device 10 inserted therein may be formed in the middle portion thereof. have.

The second support portion 1210 may be inserted into the first partition wall portion 1120 so that the second lower plane portion may be exposed to the first support portion 1120 exposed by the first partition wall portion 1120. [ 1110), and an outer side surface connecting the second lower surface and the second upper side surface is supported by the inner surface of the first partition wall portion 1120 and flows in a horizontal direction . The opening 1211 of the second supporting part 1210 may have the same plane shape as the fixing groove 1111 and the opening 1211 of the second supporting part 1210 may be formed with a The portable display device 10 protruding from the upper plane can be inserted and fixed. The thickness of the second support portion 1210 may be greater than the thickness of the portable display device 10 protruding from the first upper plane so as to support the application plate 1300 at a predetermined distance from the portable display device 10. [ Lt; / RTI >

The second partition 1220 may be disposed to surround the opening 1211 on the second upper surface of the second support portion 1210 and may protrude from the second upper surface by a predetermined height. The second partition 1220 may be formed to expose the second upper planes of the predetermined width from the opening 1211 and the opening 1211.

The application plate 1300 may have a flat plate structure having a larger area than the fixing groove 1111 and may be inserted into the second partition wall 1220 and exposed by the second partition wall 1220. [ The lower surface may be supported by the second upper plane, and one or more injection holes may be formed in the middle portion for injection of the adhesive composition. Although two injection holes are shown in FIG. 8, more than two injection holes may be formed in the application plate 1300. As described above, since the thickness of the second supporting portion 1210 is greater than the thickness of the portion of the portable display device 10 protruding from the first upper plane, Can be disposed on the display area of the display device 10 at a predetermined distance therefrom.

Meanwhile, when inserted into the second partition 1220, the side of the application plate 1300 may be supported by the inner surface of the second partition 1220 to prevent the flow in the horizontal direction .

Hereinafter, a method of attaching the curved cover protective film to the portable display device 10 using the curved cover protective film applying apparatus 1000 will be described.

A method of attaching a curved cover protective film according to an embodiment of the present invention includes applying a pressure sensitive adhesive composition to a display area of a portable display device 10; The protective film member 110 is loaded on the display area of the portable display device 10 to which the adhesive composition is applied to separate the adhesive composition layer between the portable display device 10 and the protective film member 110 ; And curing the adhesive composition.

In the step of applying the adhesive composition to the display area of the portable display device 10, the portable display device 10 is first fixed to the fixing groove 1111 of the lower case 1100, 1200 can be inserted and fixed in the first partition wall 1120 of the lower case 1100. Next, the application plate 1300 is inserted into the second partition wall 1220 of the upper case 1200 to be fixed on the portable display device 10, and then the adhesive composition is injected into the application plate 1300 Can be applied to the display area of the portable display device (10) through the hole (1301).

The protective film member 110 is loaded on the display area of the portable display device 10 to which the adhesive composition is applied so that the adhesive composition layer is sandwiched between the protective film member 110 and the portable display device 10. [ The application plate 1300 is removed from the upper case 1200 and then the portable display device 1010 is opened through the opening 1211 of the second support part 1210 of the upper case 1200 The protective film member 110 can be loaded on the display region of the display panel 100. [ When the protective film member 110 is loaded in the display area of the portable display device 10 to which the adhesive composition is applied, the adhesive composition is prevented from being damaged due to the capillary phenomenon by the weight of the protective film member 110 The adhesive composition layer is diffused to the entire area between the film member 110 and the portable display device 10 to form the adhesive composition layer. On the other hand, if no additional external force acts on the protective film member 110, the adhesive composition may not flow out of the area between the protective film member 110 and the portable display device 10 due to surface tension .

In the step of curing the adhesive composition, the adhesive composition may be photo-cured or thermoset. The photocuring method and the thermosetting method of the pressure-sensitive adhesive composition are not particularly limited, and known methods can be applied without limitation. For example, when the pressure-sensitive adhesive composition is photo-cured, the pressure-sensitive adhesive composition can be cured by ultraviolet light, visible light, or infrared light emitted from sunlight, fluorescent lamp, LED light source, UV lamp or the like.

According to the present invention, a flowable adhesive composition is diffused and flowed between a protective film member and a portable display device to form a layer of a pressure-sensitive adhesive composition, and the protective film member is adhered to the portable display device by curing, Even if the curvature of the display area and the curvature of the curved area of the protective film member are different from each other, the entire area of the protective film member can be stably attached to the portable display device. As a result, there is no problem of lowering the touch sensitivity caused by the air layer formed between the protective film member and the portable display device or degrading the display characteristics.

In addition, in the present invention, the protective film member may be attached to the portable display device by forming an adhesive force improving pattern on the surface of the protective film member which is in direct contact with the adhesive composition and forming a water repellent / oiling pattern along the edge of the surface It is possible to prevent the adhesive composition from flowing out to the outside of the protective film member in the process, so that the protective film member can be stably and easily attached to the portable display device.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

100: Curved cover glass protective film 110: Protective film member
111: protective film layer 112: substrate layer
113: adhesive layer 114: water-repellent / oil-repellent pattern
120: Adhesive layer
1000: Surface protective film attachment device
1100: lower case 1110: first support part
1120: first partition part 1200: upper case
1210: second support part 1220: second partition part
1300: dispensing plate

Claims (23)

A curved cover protective film for protecting a display area of a portable display device including a flat display area and a curved display area,
A protective film member having a planar region corresponding to the planar display region and a curved region extending from an edge of the planar region and corresponding to the curved display region; And
And a pressure-sensitive adhesive composition for forming an adhesive layer for attaching the entire area of the lower surface of the protective film member to the display area of the portable display device,
Wherein the adhesive layer has a viscosity of 1 to 500 cps so that the adhesive composition having fluidity is spread between the entire area of the lower surface of the protective film member and the display area of the portable display device by the weight of the protective film member, Which is formed by curing,
Wherein the protective film member comprises an adhesion improving pattern including a dot projection pattern or a linear projection pattern that protrudes from the lower surface to improve adhesion with the adhesive layer.
delete The method according to claim 1,
Wherein the adhesive composition comprises an ultraviolet (UV) polymerizable oligomer and a photopolymerization initiator. The method of claim 3,
Wherein the ultraviolet polymerizable oligomer comprises at least one member selected from the group consisting of a modified acrylic oligomer, a polyester oligomer, an epoxy oligomer, a urethane oligomer, a polyether oligomer, a polyacrylic oligomer and a silicone acrylate oligomer,
The photopolymerization initiator may be a benzoin ether compound, an amine compound, an a-hydroxy ketone compound, a phenyl glyoxylate compound, or an acyl phosphine oxide compound ≪ / RTI > wherein the protective film comprises at least one selected from the group consisting of: The method of claim 3,
Wherein the adhesive composition further comprises a diluent,
The diluent may be selected from the group consisting of styrene monomer, methylmethacrylate monomer, ethylmethacrylate monomer, n-butylmethacrylate monomer, iso-butylmethacrylate monomer, But are not limited to, monomers, t-butylmethacrylate monomers, vinylchloride monomers, vinyl acetate monomers, acrylonitrile monomers, 2-ethylhexylmethacrylate, Butylacrylate monomer, laurylmethacrylate monomer, methylacrylate monomer, ethylylacrylate monomer, n-butylacrylate monomer, iso-butylacrylate monomer, , 2-ethylhexylacrylate monomer, ethylene monomer and octadecylmethacrylate ethacrylate) monomers; or
Acrylic acid, acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, di-ethylaminoethylmethacrylate, t-butylaminoethylmethacrylate, di-ethylaminoethylmethacrylate, glycidylmethacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropylacrylate, itaconic acid, maleic acid, acrylamide, and N-methylolacrylamide. ). ≪ / RTI > 21. The curved cover protective film of claim < RTI ID = 0.0 > 1, < / RTI > 6. The method of claim 5,
Wherein the content of the ultraviolet polymerizable oligomer in the adhesive composition is 50 to 80 wt%, the content of the diluent is 14 to 49 wt%, and the content of the photopolymerization initiator is 0.5 to 5 wt%. Curved cover protective film. The method according to claim 1,
Wherein the protective film member comprises:
A protective film layer including the planar region and the curved region;
A base film comprising a polymer film covering the entire lower surface of the protective film layer; And
And an adhesive layer positioned between the protective film layer and the base layer and adhering them,
Wherein the adhesive layer adheres the entire area of the lower surface of the substrate layer to the display area of the portable display device,
Wherein the adhesive force improving pattern includes the dot projection pattern or the linear projection pattern protruding from the lower surface of the substrate layer.
delete delete delete 8. The method of claim 7,
Wherein the protective film member is formed along an edge of the base layer and further comprises a water-repellent / oil-repellent pattern formed of a polymer material having water repellency and oil repellency. 12. The method of claim 11,
The water-repellent / oil-repellent pattern may be formed of at least one of PTFE (Polytetrafluoroethylene), PFA (Perfluoroalkoxy), FEP (fluorinated ethylene propylene), ETFE Polyether etherketone (PES), Polyphenylene sulfide (PES), Polyamide (PA), Polyacetal (POM), Polyamide imide (PAI), Polyether sulfone (PES), Polyvinylidene fluoride (PVF) Wherein the protective film comprises at least one material selected from the group consisting of PEI (Polyether imide), PC (Polycarbonate) and PPE (Polyphenylene ether). 12. The method of claim 11,
Wherein the water-repellent / oil-repellent pattern has a width of 10 to 500 mu m. The method according to claim 1,
Wherein the protective film member includes a protective film layer including the planar region and the curved region,
Wherein the adhesive layer adheres the entire area of the lower surface of the protective film layer to the display area of the portable display device,
Wherein the adhesion enhancing pattern includes the dot projection pattern or the linear projection pattern protruding from the lower surface of the protective film layer.
delete 15. The method of claim 14,
Wherein the protective film member is formed along the edges of the protective film layer and further comprises a water repellent / oiling pattern formed of a polymer material having water repellency and oil repellency. The method according to claim 1,
Wherein the protective film member comprises:
A protective film layer including the planar region and the curved region;
A base film including a polymer film disposed below the protective film layer to expose an edge region of a lower surface of the protective film layer; And
And an adhesive layer positioned between the protective film layer and the base layer and adhering them,
Wherein the adhesive layer adheres the entire area of the lower surface of the substrate layer to the display area of the portable display device,
Wherein the adhesive force improving pattern includes the dot projection pattern or the linear projection pattern protruding from the lower surface of the substrate layer. 18. The method of claim 17,
Wherein the protective film member is formed along the edge region of the exposed protective film layer and further comprises a water-repellent / oil-repellent pattern formed of a polymer material having water repellency and oil repellency. Disposing an application plate on the display area of the portable display device in which one or more injection holes for injecting the adhesive composition are formed in the middle part;
Dropping the adhesive composition into the display area of the portable display device through the injection hole;
Loading the protective film member on the display area of the portable display device to which the pressure-sensitive adhesive composition is applied, thereby diffusing the pressure-sensitive adhesive composition between the portable display device and the protective film member; And
And curing the adhesive composition,
A dot protrusion pattern or a linear protrusion pattern is formed on the lower surface of the protective film member,
Wherein when the protective film member is loaded, the pressure-sensitive adhesive composition diffuses and flows into the entire area between the protective film member and the portable display device through capillary action due to the weight of the protective film member. / RTI >
20. The method of claim 19,
Wherein the adhesive composition comprises an ultraviolet (UV) polymerizable oligomer, a photopolymerization initiator and a diluent, and has a viscosity of 1 to 500 cps. 21. The method of claim 20,
Wherein the ultraviolet polymerizable oligomer comprises at least one member selected from the group consisting of a modified acrylic oligomer, a polyester oligomer, an epoxy oligomer, a urethane oligomer, a polyether oligomer, a polyacrylic oligomer and a silicone acrylate oligomer,
The photopolymerization initiator may be a benzoin ether compound, an amine compound, an a-hydroxy ketone compound, a phenyl glyoxylate compound, or an acyl phosphine oxide compound At least one selected from the group consisting of < RTI ID = 0.0 >
The diluent may be selected from the group consisting of styrene monomer, methylmethacrylate monomer, ethylmethacrylate monomer, n-butylmethacrylate monomer, iso-butylmethacrylate monomer, But are not limited to, monomers, t-butylmethacrylate monomers, vinylchloride monomers, vinyl acetate monomers, acrylonitrile monomers, 2-ethylhexylmethacrylate, Butylacrylate monomer, laurylmethacrylate monomer, methylacrylate monomer, ethylylacrylate monomer, n-butylacrylate monomer, iso-butylacrylate monomer, , 2-ethylhexylacrylate monomer, ethylene monomer and octadecylmethacrylate ethacrylate) monomers; Or acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, But are not limited to, di-methylaminoethylmethacrylate, t-butylaminoethylmethacrylate, diethylaminoethylmethacrylate, glycidylmethacrylate, 2-hydroxyethyl 2-hydroxypropylacrylate, itaconic acid, maleic acid, acrylamide, and N-methylol acrylamide (N-hydroxyethyl acrylate) methylolacrylamide). < Desc / Clms Page number 20 >
A first support portion having a first upper flat surface which surrounds the fixing groove, and a second support portion which is arranged to surround the fixing groove on the first upper plane, A lower case having a first partition wall protruding from an upper plane;
And a second upper flat surface, which is inserted into the first partition wall portion and which is supported by the first upper flat surface and the second lower flat surface, And an upper case having a second support portion formed on the second upper surface and surrounding the opening and having a second partition wall protruded from the second upper surface; And
A second flat surface having a larger area than the fixing groove and being inserted into the second partition and being supported by the second upper surface so as to be positioned above the portable display device, And an application hole in which the injection holes are formed. 23. The method of claim 22,
The depth of the fixing groove is smaller than the thickness of the portable display device,
Wherein a sum of a depth of the fixing groove and a thickness of the second supporting portion is larger than a thickness of the portable display device.

Images