KR20200127444A - Method for manufacturing security film for flexible display and security film using the same - Google Patents

Abstract

The present invention relates to a method of manufacturing a security film for a flexible display and a security film using the same, and more specifically, to a method of manufacturing a security film for a flexible display, which comprises the steps of: forming a security pattern layer on one surface of a base film made of soft materials; and forming a light-blocking coating layer after forming the security pattern layer. Accordingly, the base film made of soft materials is in perfect contact with a front surface of the flexible display, and a privacy protection function can be expected through the security pattern layer and the light-blocking coating layer. A security film comprising a base film, a security pattern layer, and a light-blocking coating layer is molded by using the manufacturing method.

Description

Manufacturing method of security film for flexible display and security film using the same {METHOD FOR MANUFACTURING SECURITY FILM FOR FLEXIBLE DISPLAY AND SECURITY FILM USING THE SAME}

The present invention relates to a method of manufacturing a security film for a flexible display and a security film using the same, and more specifically, forming a security pattern layer on one side of a soft material base film, and forming a light shielding coating layer after the formation of the security pattern layer A method of manufacturing a security film for a flexible display that can be expected to protect privacy through a security pattern layer and a light-shielding coating layer, and a soft material base film is perfectly adhered to the front of the flexible display. It relates to a security film made of a base film, a security pattern layer and a light-shielding coating layer to be molded.

In general, display devices include mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation, ultra mobile PCs (UMPCs), mobile phones, smart phones, personal computers (tablets), and watchphones. ), as well as portable electronic devices, such as televisions, laptop computers, monitors, and bank deposit and withdrawal devices (ATMs).

As such display screens, i.e. displays, become expensive when damaged, users generally attach a protective film to protect the display, and in particular, a protective film that narrows the viewing angle in consideration of personal information exposure is widely used. .

As such a conventional technology, there is registered patent No. 10-1620781 "Flip type smartphone protection cover with a security window",

The prior art is a flip type including a fixed cover that is coupled to a smartphone so as to be detachable, a flip cover formed integrally with the fixed cover and foldable and covers the screen of the smartphone, and a transparent window provided on the flip cover. A smartphone protective cover, comprising: an X-axis security film provided on a front surface of a touch panel of the smartphone and having security in an X-axis direction; A Y-axis security film provided on one side of the transparent window and having security in the Y-axis direction is provided, and a technology is provided so that a user can select the security and transmittance by closing or opening the flip cover provided with the transparent window.

However, in the prior art, it is difficult to purchase a case by forming a window of a security film on the case rather than attaching it to the display.

In addition, there is a registered utility model No. 20-0362406 "Protection cover for mobile communication device" as a conventional technology.

The prior art includes a first cover 10 that is closely coated on the display unit 1 of a mobile communication device; It consists of a second cover 20 that is closely coated on the keypad part 2 or the battery part 3 of the mobile communication device, wherein the first and second covers 10 and 20 are made of a transparent material and have a thickness Is composed of 0.04 to 2mm, and the first cover 10 and the second cover 20 are joined to each other by at least one joint portion 30.

However, the prior art is simply designed to protect the display, and it is difficult to expect security for preventing personal information exposure.

Further, there is a conventional patent publication No. 10-2016-0083609 "Light control film and a display device including the same",

The prior art includes a plurality of viewing angle control patterns provided on the lower surface of the base film, and each of the plurality of viewing angle control patterns is provided in parallel with at least one of the first and second longitudinal directions of the base film to narrow the viewing angle. It relates to technology to secure security.

However, the prior art has a limitation in that it is easy to attach to a flat display, but it is difficult to attach to a flexible display having a curved edge portion.

In other words, conventional protective films are often made of glass or PET material to improve adhesion, but due to the development of technology, a display with a curved edge, that is, a flexible display, is manufactured to correspond to the curved surface. There is a limitation, and there is a problem that the function of the protective film cannot be performed properly due to the occurrence of lifting of the curved portion.

Therefore, the present invention was devised to solve the above problem,

It consists of forming a security pattern layer on one side of the base film, and forming a light-shielding coating layer after forming the security pattern layer, and the base film is composed of a soft base film so that it can be perfectly attached to a flexible display. , A method of manufacturing a security film for a flexible display that can include a privacy protection function through a security pattern layer and a light-shielding coating layer, and to provide a security film using the same.

Further, in forming a security pattern layer on one side of the base film, a method of manufacturing a security film for a flexible display that allows the security pattern layer to be more stably adhered to the base film as the adhesive layer is further provided, and a security film using the same. Another purpose is to provide.

In order to achieve the above object, the method of manufacturing a security film for a flexible display according to the present invention

(a) forming an adhesive layer on one surface of the base film, and forming a security pattern layer on the adhesive layer; And

(b) forming a light shielding coating layer between the security patterns after the security pattern layer is formed;

It characterized in that it is made, including,

The security film for a flexible display according to the present invention

Base film;

An adhesive layer provided on one surface of the base film;

A security pattern layer formed on one surface of the adhesive layer and comprising a plurality of security patterns;

A light blocking coating layer filled between the security patterns;

It characterized in that it comprises a.

As described above, the method of manufacturing a security film for a flexible display according to the present invention and a security film using the same

(a) having an adhesive layer on one side of the base film, forming a security pattern layer on the adhesive layer, and (b) forming a light-shielding coating layer after forming the security pattern layer, wherein the base film is made of a soft material As it is made of, it is possible to perfectly adhere to and attach to a flexible display without lifting, so that the display is completely protected, and a privacy protection effect can be expected by narrowing the viewing angle by the security pattern layer and the light-shielding coating layer.

In addition, there is an effect that the security pattern layer or the light-shielding coating layer or all of them can be more completely adhered to the base film by the adhesive layer.

1 is a block diagram of a method of manufacturing a security film for a flexible display according to the present invention
2 is an implementation view of a security film for a flexible display according to the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

In each drawing, the same reference numerals, in particular the number of tens and ones, or the same number of tens, ones, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference number can be identified as a member conforming to these criteria.

In addition, the components in each drawing are expressed by exaggeratingly large (or thick) or small (or thin) or simplified the size or thickness in consideration of the convenience of understanding, but this limits the scope of protection of the present invention. It shouldn't be.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist~ are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, 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 the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

As shown in FIG. 1, the method of manufacturing a security film for a flexible display according to the present invention comprises the steps of (a) providing an adhesive layer on one side of the base film (B1), and forming a security pattern layer on the adhesive layer (100 ); And (b) forming a light-shielding coating layer after forming the security pattern layer (200), and a security film for a flexible display according to the present invention will be described together. (See FIG. 2)

First, the present invention is designed to be in close contact with a flexible display, and the base film (B1) is characterized in that it is made of a base film (B1) of a soft material.

More specifically, the base film (B1) is made of any one of TPU (Thermoplastic PolyUrethane), PE (polyethylene), PVC (Polyvinyl chloride), EVA (Ethylene-vinyl acetate copolymer), and more preferably TPU It is better to be made of a material.

A film made of a TPU material, which is commonly referred to as a urethane film, is a soft material that is not rigid like tempered glass, and has a characteristic that it is preferable to be attached to a flexible display.

In addition, the security pattern layer 10 is molded on one surface of the base film B1, and refers to a plurality of security patterns spaced apart from each other for narrowing the viewing angle.

In addition, the light-shielding coating layer 20 refers to a layer that is formed on one surface of the base film B1 after molding the security pattern on the base film B1 to be filled between the plurality of security patterns,

In general, the light-shielding coating layer 20 is made of a light-shielding film containing a carbon component, and serves to prevent diffuse reflection of light.

In addition, the adhesive layer (P) is a layer used to more stably adhere the security pattern layer 10 or both the security pattern layer and the light-shielding coating layer 20 to the base film (B), and various types such as liquid, solid, tape, etc. It can be done with.

In addition, the method of forming the security pattern of step (a) on the base film (B1), and further, the method of forming the light-shielding coating layer 20 of step (b) is a UV irradiation method, compression method, gravure method, lamination method. It can be selected among the methods.

First of all, in the UV irradiation (coating) method, a UV adhesive is applied to one side of the base film (B1) or a security pattern, or a UV adhesive is applied to the film on which the supplementary pattern is formed, and then a security pattern is formed on the base film (B1). It refers to a method in which a security pattern can be formed on the base film (B1) by attaching the film and curing it by UV irradiation.

In the case of the UV irradiation method, as the photoinitiator component is included in the adhesive, the curing time can be shortened, and by using a transparent adhesive, an effect of high transmittance can be expected.

The compression method is a method of forming a security pattern layer 10 by compressing the film on which the security pattern is formed on the base film B1, and a pressing roller is provided on the base plate, and the pressing roller is placed between the base plate and the base plate. As the film (B1) and the film on which the security pattern is formed pass, the security pattern is printed on the base film (B1) by pressing force.

At this time, in general, when the security pattern is compressed to the base film B1, heat is applied to further improve adhesion.

The gravure method refers to a method in which the security pattern formed on the pattern roll is transferred to the base film B1 as the base film B1 passes through the pattern roll.

The laminating method refers to a method in which the security pattern is coated on the base film B1 by passing the formed film and the base film B1 between the rotating pair of rollers.

In addition, the above methods can also be used when attaching (coating) the light shielding coating layer 20 to the base film B1 on which the security pattern layer is formed, and more precisely, filling between the security patterns of the security pattern layer, Therefore, the scope of the rights should not be limited and interpreted.

The protective film produced in the above manner is formed as shown in Fig. 2, first, Fig. 2[A] is a security pattern layer 10 formed on one side of the base film B1, and the security pattern layer 10 is formed on one side of the security pattern. It shows a protective film having the light-shielding coating layer 20 formed thereon, and as shown in the drawing, an adhesive layer (P) is further provided on one surface of the base film (B1), and a plurality of security is provided on the adhesive layer (P). The security pattern layer 10 made of a pattern is formed, and the light-shielding coating layer 20 is formed and more accurately filled between the security patterns.

In addition, as shown in Figs. 1 and 2[B], the present invention may further include a transfer step to produce a protective film.

The transferring step is (c) a step 300 of transferring the base film B1 on which the security pattern layer 10 and the light blocking coating layer 20 are formed to the second base film B2, and the second base film B2 ), like the first base film (B1), is preferably made of a film made of a soft material that is any one of Thermoplastic Polyurethane (TPU), polyethylene (PE), polyvinyl chloride (PVC), and ethylene-vinyl acetate copolymer (EVA). , It may be made of a film of a hard material such as PET.

In this case, in the case of the PET material, since the materials of the base film B1 and the second base film B2 are different from each other (release material), a separate primer is preferably applied to increase mutual adhesion,

The primer is for increasing adhesion, and may be used in molding the light shielding coating layer 20 or the security pattern layer 10 or both, and the scope of the rights should not be limited and interpreted.

That is, the security film for a flexible display according to the present invention includes a base film (B1), a security pattern layer (10) formed on one surface of the base film (B1), and a light shielding coating layer (20) formed on one surface of the security pattern layer (10). ), more precisely, in the security pattern layer 10 consisting of the plurality of security patterns, including a light-shielding coating layer 20 filled between the security patterns,

The base film (B1) is the base film (B1) mentioned above, or refers to the second base film (B2), and the scope of the rights should not be limited thereto.

In addition, it is preferable to further adhere a separate release film to one or both sides of the thus formed security film to prevent foreign substances from being adhered or scratches.

In addition, in describing the present invention above, a method of manufacturing a security film for a flexible display having a specific shape, structure, and configuration and a security film using the same has been mainly described with reference to the accompanying drawings, but the present invention is various modifications and changes by those skilled in the art. And substitutions are possible, and such modifications, changes and substitutions should be construed as belonging to the scope of the present invention.

100: (a) step 200: (b) step
300: (c) step
B1: base film 10: security pattern layer
20: shading coating layer B2: second base film

Claims (4)

(a) forming an adhesive layer on one surface of the base film, and forming a security pattern layer on the adhesive layer; And
(b) forming a light blocking coating layer between the security patterns forming the security pattern layer after the security pattern layer is formed;
A method of manufacturing a security film for a flexible display, characterized in that comprising a. The method of claim 1,
Step (a)
Formed by UV irradiation method or compression method or gravure method or lamination method, or

After the steps (a) and (b), (c) the base film on which the security pattern layer and the light-shielding coating layer are formed is further transferred to the second base film. . The method of claim 2,
The base film or the second base film is a method of manufacturing a security film for a flexible display, characterized in that the base film of a soft material. Base film;
An adhesive layer provided on one surface of the base film;
A security pattern layer formed on one surface of the adhesive layer and comprising a plurality of security patterns;
A light blocking coating layer filled between the security patterns;
A security film for a flexible display, characterized in that comprising a.

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