KR20070056455A - Optical film with detaching tip for separation covers from optical film and method thereof - Google Patents

Abstract

An optical film and a method for manufacturing the same are provided to easily release a protection film from the optical film in a manufacturing process of a backlight unit, by forming a detaching tip, which is extended from the protection film, adjacently to a corner of the optical film. A protection film is attached on at least one surface of an optical film(10) to protect the optical film, wherein the protection film includes an upper protection film(18) and a lower protection film(19). A detaching tip(11) is extended from the protection film. The detaching tip is formed adjacently to at least one corner of the optical film. The detaching tip is extended from the upper protection film or the lower protection film. The detaching tip is formed in a fan-shape.

Description

Optical film with a protective film having a release tip and a method of manufacturing the same {Optical film with detaching tip for separation covers from optical film and method

1 is a plan view of an optical film with a conventional protective film.

2 is a cross-sectional view of an optical film with a conventional protective film shown in FIG.

Figure 3 is a mold and its punched state diagram for manufacturing the optical film with a conventional protective film shown in FIG.

4 is a plan view and a cross-sectional view of an optical film with a protective film having a release tip according to the present invention.

5 is a plan view and a partial perspective view of a mold for manufacturing an optical film with a protective film having a release tip according to the present invention.

6 is a partial cross-sectional view of a mold for manufacturing an optical film with a protective film having a release tip according to the present invention.

Figure 7a, Figure 7b is a state diagram before and after cutting in the process of manufacturing the optical film with a protective film having a release tip according to the present invention, respectively.

`` Explanation of symbols for main parts of drawings ''

10: optical film 11: release tip

12 fastener 13 base layer

15: fine pattern layer 18: upper protective film

19: underside protective film 20: mold

22: cutting blade 22a: main part

22b: boundary part 22c: release tip part

22d: Fastener

The present invention relates to an optical film with a protective film having a release tip and a method of manufacturing the same, and more particularly, when a predetermined optical film is used in the process of the LCD backlight device, an operator can easily release the protective film. The present invention relates to an optical film having a protective film having a release tip and a method of manufacturing the optical film.

In general, a liquid crystal display (LCD) is a display device that enables a user to recognize the information processed by the information processing device by precisely controlling the light transmittance of the liquid crystal using the electro-optical characteristics of the liquid crystal.

The liquid crystal display device includes a liquid crystal display assembly for controlling a liquid crystal to implement a predetermined image and information, and a backlight unit for supplying light to view an image, information, and the like implemented in the liquid crystal display assembly.

On the other hand, the performance of the image display device such as the LCD is greatly affected by the performance of the backlight unit using the optical film.

This is because a method of controlling the amount of light by reflecting or transmitting light through the optical film is the basis, and various optical films having excellent optical performance have been proposed to effectively apply the thin film optical film to the image display means.

Such an optical film is mainly used as an element of a backlight unit to increase luminance, and the optical film is further provided with a protective film on both sides as a protective cover for protecting the optical film surface during the manufacturing process.

1 is a plan view of a conventional optical film with the conventional protective film, Figure 2 is a cross-sectional view of the optical film with the conventional protective film shown in FIG.

In FIG. 1, the optical film 10 is applied to an LCD backlight device and is installed as a prism sheet on the light guide plate of the backlight device, and has a rectangular shape in which a fastener 12 is formed to fasten to a frame of the backlight device. have.

 In addition, in the cross-sectional view of FIG. 2, the optical film 10 has a fine prism pattern layer 15 formed on the base layer 13 and the base layer 13, and is focused on the prism pattern layer 15. Will be effective.

However, since the fine prism pattern layer 15 is formed of a thermosetting or UV curable resin on the base layer 13, there is a risk of scratching or damage, and thus, the protective films 18 and 19 for protecting the optical film are protected. Attached.

The optical film 10 to which the protective films 18 and 19 are attached is cut by planting a cutting blade 22 having a fabric of an optical film 10 having a fine pattern formed thereon as shown in FIG. 3. The die 20 is manufactured, and the cutting die 20 is punched using the press machine to produce the product by punching the optical film fabric 10.

The protective films 18 and 19 are detached from the backlight device manufacturing process so that only the prism sheets 13 and 15 are coupled to the fastener 12 to a predetermined portion of the frame of the backlight device.

By the way, when the release operation for removing the protective film (18, 19) from the optical film (10), not only does not fall easily due to the adhesive force of the protective film (18, 19), but also takes a lot of time, In many cases, scratching or damage to the fine pattern 15 occurred during the releasing operation.

In addition, when the optical film 10 is cut by the punching operation during the manufacturing process of the optical film, as shown in Figure 3, the protective film 18 inside the cut edge of the optical film 10 There was a problem that the release of the protective film 18 is more difficult to be pushed down.

The present invention has been made to solve the above problems, the protective film formed with a release tip functioning as a handle portion to facilitate the release operation for removing the protective film of the optical film installed in the manufacturing step of the backlight device Eggplant is to provide an optical film and a method for producing the optical film.

The optical film having a protective film having a release tip according to the present invention for achieving the above object is formed by extending the protective film attached to at least one surface of the optical film to protect the optical film. It is characterized by including a release tip.

In addition, in the optical film with a protective film having a release tip according to the invention, the release tip is characterized in that formed on at least one corner portion of the optical film.

In the optical film with a protective film having a release tip according to the invention, preferably, the release tip is characterized in that the upper surface protective film for protecting the optical film is formed to extend.

In the optical film with a protective film having a release tip according to the invention, preferably, the release tip is characterized in that the lower protective film is formed to extend the protective film.

In addition, in the optical film with a protective film having a release tip according to the present invention, the release tip is characterized in that it is formed in a fan shape.

In the optical film with a protective film having a release tip according to the present invention, the protruding edge length of the release tip is the protruding edge length of the fastener formed at the edge of the optical film to fasten the optical film to the backlight device. It is characterized by being formed smaller or the same extension.

On the other hand, the manufacturing method of the optical film with a protective film having a release tip according to the present invention according to the product shape and size of the optical film, the main portion to determine the overall size and shape and a predetermined portion in the protective film of the optical film Preparing a cutting blade including a release tip portion protruding as much as possible, mounting the cutting blade to a mold to produce a cutting mold, and punching the cutting mold onto a fabric of the optical film to which the protective film is attached. Cutting the optical film product of a predetermined size and shape.

And, in the manufacturing method of the optical film with a protective film having a release tip according to the present invention, a step is formed at the boundary of the main portion and the release tip of the cutting blade to have a height of the cutting blade than the main portion It is characterized by being formed low.

In the method for manufacturing an optical film with a protective film having a release tip according to the present invention, Preferably, the release tip of the cutting blade is characterized in that formed in at least one corner of the main portion.

In addition, in the method for manufacturing an optical film with a protective film having a release tip according to the present invention, the release tip portion of the cutting blade is characterized in that it is formed in a fan shape.

And, in the manufacturing method of the optical film with a protective film having a release tip according to the present invention, in the step of cutting the optical film product of a predetermined size and shape by punching the cutting die over the base layer of the optical film It is characterized by punching out a die for cutting.

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

4 is a plan view and a cross-sectional view of an optical film with a protective film having a release tip according to the present invention.

The optical film according to the present invention includes all optical films used in displays such as LCD and PDP, that is, diffusion film, polarizing film, reflecting film, retardation film, and the like. Since the prism film in which the micropattern was formed as a film is described as an Example, the optical film which has the release tip which concerns on this invention is applicable to all the optical films listed above or the optical film equivalent or similar to it.

The example shown in FIG. 4 is an optical film for LCD, wherein the optical film 10 has a base layer 13 formed of resin and a fine pattern layer having a fine structured surface of a prism formed on the base layer 13 ( 15) an upper surface attached to the lower surface protective film 19 and the fine pattern layer 15 attached to the base layer 13 to protect the base layer 13 and the fine pattern layer 15. A protective film 18 and a release tip 11 is formed to extend the protective film.

In FIG. 4, the release tip 11 is formed at an edge of the optical film 10.

The release tip is a part that can be easily grasped and removed during the release operation of removing the protective film from the optical film 10, and the forming tip may be varied, but as shown in FIG. When you apply force, it is easier to remove.

In addition, in Figure 4, the release tip 11 is formed in the corner portion on the upper right of the optical film 10, it is possible in any other corner portion.

And, referring to the cross-sectional view of Figure 4, the release tip 11 is formed to extend from the upper surface protective film 18 to protect the fine pattern layer 15, the release tip 11 is the fine pattern layer 15 and the base layer 13 are suspended as they are attached.

This allows the operator to hold more easily during release than when the upper surface protective film 18 is simply extended.

In addition, the release tip 11 may be formed by extending the protective film 19 to protect the base layer 13.

In addition, the release tip 11 may be manufactured in various shapes that are easy to be gripped by the worker during the release operation, but the force is uniformly transmitted by matching the direction of the force applied during release and the center direction of the film, such as a fan shape. It is desirable to allow easy release.

In addition, the length of the protruding edge of the release tip 11 may be determined according to the margin portion generated when the optical film 10 is cut from the fabric, but the optical film 10 is fastened to the backlight device. It is preferable to be formed to extend to a length less than or equal to the length of the protruding edge of the fastener 12 protruding to the edge of the film 10, in this case the fabric is further consumed due to the formation of the release tip 11 Can be reduced.

As shown in Figure 4, in the case of configuring a backlight device with an optical film with a protective film having a release tip according to the present invention, the operator from the optical film 10 having a fine pattern layer 15 from the release tip When the force is applied while pulling up (11), the protective film 18 can be easily separated without damaging the micropattern layer 15 or causing scratches.

Subsequently, in the manufacturing process of the backlight device, the fastener 12 is coupled to a predetermined portion of the frame of the backlight device, thereby prism sheets 13 and 15 of the optical film 10 from which the protective films 18 and 19 are detached. Only the backlight unit will be mounted.

5 is a plan view and a partial perspective view of a mold for manufacturing an optical film with a protective film having a release tip according to the present invention, Figure 6 is a manufacturing an optical film with a protective film having a release tip according to the present invention 5 is a partial cross-sectional view taken along the line AA ′ of the mold of FIG. 5.

In addition, Figure 7a, Figure 7b is a state diagram before and after cutting in the process of manufacturing the optical film with a protective film having a release tip according to the present invention, respectively.

5 and 6 will be described a method for manufacturing the optical film having the release tip 11 according to the present invention.

The manufacturing process of manufacturing the optical film 10 having the release tip 11 consists of forming the release tip 11 and forming an optical film fabric into the mold by using a mold for cutting and a press machine. .

That is, the cutting blade 22 installed in the cutting die 20 has a main part 22a for determining the overall size and shape according to the product shape and size of the optical film 10 and the protective film of the optical film. Prepare a cutting blade 22 comprising a release tip portion 22c protruded by a predetermined portion in the.

Here, reference numeral 22b denotes a boundary between the main portion 22a and the release tip portion 22c, and reference numeral 22d denotes a fastener portion of the cutting blade 22 for forming the fastener 12.

6 is a cross-sectional view taken along the line AA ′ of FIG. 5, wherein a step is formed at the boundary portion 22b of the main portion 22a and the release tip portion 22c of the cutting blade 22 to form the main portion. It can be seen that the height of the cutting blade is formed lower than that of the portion.

In the boundary portion 22b where the step is formed and the height of the cutting blade 22 is low, as shown in FIG. 7B, when the direction in which the cutting blade 22 acts is directed toward the base layer 13, the optical film ( Cutting is performed to the base layer 19 and the fine pattern layer 15 of the 10, but the cutting film 11 is not cut, the release tip 11 is formed to extend the protective film 18 at its edge ). Next, as shown in FIG. 5, the cutting blade 22 is mounted on a mold to produce a cutting mold.

Here, the mold 20 to which the cutting blade 22 is mounted is to use a wood mold.

The final step is as shown in Figure 7a, 7b to punch the cutting die 20 on the fabric of the optical film 10 to which the protective films 18, 19 are attached to the optical film of a predetermined size and shape Cutting the product to produce the final product.

In this step, as shown in FIG. 7B, an optical film 10 having a release tip 11 is obtained.

In FIG. 7B, the die 20 having the cutting blades 22 mounted thereon is cut by the pressing machine in the direction of the base layer 13, but when the cutting direction is cut downward, the release tip 11 is cut. When the protective film 19 is extended to be able to make the release tip (11).

Here, since the release tip 11 is formed in the corner portion of the optical film 10, as shown in FIG. 4, so that the release tip 11 is easily removed during the release operation. Accordingly, the release tip portion 22c of the cutting blade 20 is In Figure 5 it is formed while forming the boundary portion 22b at the main portion 22a and at least one corner of the cutting blade 22.

In addition, as shown in FIG. 4, the release tip 11 has a fan shape so as to be easily gripped by an operator during a release operation. In FIG. 5, the release tip part 22c of the cutting blade 22 is formed in a fan shape. It is installed in the mold 20.

Therefore, as shown in Figure 7b, the finished optical film 10 as a product is a release tip that can remove the protective film (18, 19) from the fine pattern layer 15, the base layer 13 ( Since 11) is added, the releasing operation can be easily and quickly processed in the backlight manufacturing process.

According to the present invention, by forming a release tip on the optical film with a protective film, it is possible to facilitate the release operation for removing the protective film attached to the optical film in the manufacturing step of the backlight device, which may occur during the release operation Since the occurrence of scratches on the micropatterns formed on the optical film is prevented, the work efficiency and quality of the backlight manufacturing process using the optical film can be expected to be improved.

Although the present invention has been described in detail only with respect to the specific embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (11)

In the optical film with a protective film, The protective film is attached to the protective film having a release tip, characterized in that it comprises a release tip formed by extending the protective film attached to at least one surface of the optical film to protect the optical film. The method of claim 1, The release tip is an optical film with a protective film having a release tip, characterized in that formed on at least one corner portion in the optical film. The method of claim 1,  The release tip is an optical film with a protective film having a release tip, characterized in that the upper surface of the protective film to protect the optical film is formed extending. The method of claim 1, The release tip is an optical film with a protective film having a release tip, characterized in that the protective film is formed by extending the lower surface to protect the optical film. The method of claim 1, The release tip is an optical film with a protective film having a release tip, characterized in that formed in a fan shape. The method of claim 1, Protective film having a release tip is characterized in that the protruding edge length of the release tip is formed to extend the same or smaller than the protruding edge length of the fastener protruding to the edge of the optical film in order to fasten the optical film to the backlight device Attached optical film. Preparing a cutting blade including a main part determining overall size and shape and a release tip part protruding from a protective film of the optical film according to a product shape and size of the optical film; Mounting the cutting blade to a mold to manufacture a cutting mold; And Method of manufacturing an optical film with a protective film having a release tip comprising the step of cutting the optical film product of a predetermined size and shape by punching the cutting mold on the fabric of the optical film with the protective film. The method of claim 7, wherein A step is formed at the boundary between the main part and the release tip of the cutting blade, the height of the cutting blade is formed lower than the main part, characterized in that the manufacturing method of the optical film with a protective film having a release tip. The method of claim 7, wherein The release tip of the cutting blade is a method of manufacturing an optical film with a protective film having a release tip, characterized in that formed on at least one corner of the main portion. The method of claim 7, wherein The release tip of the cutting blade is a manufacturing method of an optical film with a protective film having a release tip, characterized in that formed in a fan shape. The method of claim 7, wherein In the step of cutting the optical film product of a predetermined size and shape by punching the cutting mold, the optical film with a protective film having a release tip, characterized in that by cutting the cutting mold over the base layer of the optical film. Method of preparation.

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