WO2019059742A1 - 시인성을 향상시킨 보안용 패턴 필름 - Google Patents
시인성을 향상시킨 보안용 패턴 필름 Download PDFInfo
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- WO2019059742A1 WO2019059742A1 PCT/KR2018/011423 KR2018011423W WO2019059742A1 WO 2019059742 A1 WO2019059742 A1 WO 2019059742A1 KR 2018011423 W KR2018011423 W KR 2018011423W WO 2019059742 A1 WO2019059742 A1 WO 2019059742A1
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- pattern
- image
- region
- cell
- fine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/355—Security threads
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
Definitions
- the present invention relates to a security pattern film having improved visibility.
- Security products such as banknotes, securities, and confidential documents requiring security are provided with at least one security medium for preventing forgery, illegal leakage, theft and the like.
- a security strip such as a banknote, a securities, etc.
- a band-shaped hinge line of about 5 mm.
- These silver lines are manufactured by printing small letters, numbers or images (hereinafter referred to as " images ") on the surface of a transparent synthetic resin film such as polyester and cutting the film to a predetermined width, Is used to confirm the authenticity of the security paper by being inserted partially exposed between the se pulp.
- an image is formed on a surface of a transparent synthetic resin film by a fine pattern 12 in an area of a pattern cell 11 having a diameter of about 20 ⁇ m to 30 ⁇ m, and a plurality of pattern cells 11 are roughly And a pattern film 10 arranged at an interval of 20 mu m to 30 mu m in a horizontal, vertical, diagonal, or arbitrary direction.
- the security film is bonded onto the pattern film 10 and includes a lens film 20 on which a plurality of microlenses 21 are arranged.
- the security film is a combination of a plurality of pattern cell arrays and microlens arrays matched or mismatched, and the images of the fine patterns pass through the microlenses to realize a character, a number, an image, or a combination thereof as a whole.
- the pattern cell and the microlens are composed of approximately 1,016 LPI (line per inch), approximately 1,032,256 pattern cells 11 and microlenses 21 Numerals, images, or a combination thereof formed by the fine patterns 12 are combined while being matched or mismatched.
- a security film used in a US $ 100 bill is structured such that the image "species” and the number "100" are recognized as being crossed on the left and right according to the viewing direction. At this time, the film is divided into left and right sides with a width of about 1/2 with respect to the width direction, and 'type' and '100' are positioned.
- the fine pattern 12 for forming a specific image in the pattern cell 11 must have a line width and a gap of at least 2 ⁇ due to the difficulty of patterning and polymer processing. Therefore, since only 10 line widths and intervals may exist in the pattern cell 11 having a diameter of about 20 mu m, it is not easy to pattern an image of a specific shape.
- the number '100' includes at least five line widths and four spaces with respect to the horizontal direction, so an area of at least 18 ⁇ m should be secured.
- the security film used for the US paper money A method of patterning a 'seed' in a lateral direction in a 10 ⁇ m region on one side while patterning '100' in a longitudinal direction in a 10 ⁇ m region on the other side is applied.
- a fine pattern having a line width and an interval of 20 or more like '100000' can not be patterned in the pattern cell 11 having a diameter of about 20 ⁇ m.
- the fine pattern having a line width and an interval of 6 or more can not be patterned or patterned in a different direction. This problem can be solved by increasing the diameter of the pattern cell, but in this case, since the size of the microlens and the optical distance to the microlens must be increased as well, the sharpness of the image is lowered and the thickness of the security film is increased. have.
- the conventional security film implements the image of the fine pattern 12 externally
- the entire image is patterned in each pattern cell, and the patterned recess portion is filled with pigment.
- a pattern cell array and a microlens array are combined to form an entire image.
- only a part of the image contributes to the entire image implementation in an actual pattern cell, and the remaining image does not contribute to the whole image implementation.
- a method of arranging dummy cells in which patterning is omitted among vertically alternating pattern cells may be considered, but in this case, the density of the pattern to be implemented is blurred and the visibility improving effect does not appear .
- the security film according to the related art has a problem that the size and shape of an image that can be formed as a fine pattern in a unit pattern cell having a predetermined size are limited, and further, it is more difficult to implement a plurality of images.
- the conventional security film has the problem that the visibility of the image formed by the fine pattern is lowered because the pigment is filled in both the area contributing to image implementation and the non-contributing area.
- the present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of patterning a plurality of images in a unit pattern cell without affecting the size or shape of an image formed by the fine pattern, It is an object of the present invention to provide a pattern film for security that can implement an image.
- Another object of the present invention is to apply a patterning and pigment filling process only to a specific region of a pattern cell to clearly distinguish a pattern region and a non-pattern region in the pattern cell region so that an image formed by the fine pattern can be clearly seen To provide a security pattern film.
- a security pattern film for forming an image by combining a micro lens array and a pattern cell array, wherein the pattern cell array comprises a transparent resin
- a fine pattern for forming an image is formed in a pattern cell region on one side of the film, and a recess is formed in the recessed portion of the fine pattern to fill the pigment to form an image of the fine pattern, (N is an integer of 2 or more), and 1 / n portion of the entire image is formed in a fine pattern in any one of n divided regions.
- the fine pattern may have an embedded structure
- the embedded structure may be formed by patterning, masking, exposing and etching the wafer mold, molding the soft mold with the fabricated wafer mold, It is done by transferring
- fine patterns are formed in two or more regions separated from the n divided regions, and a spaced 1 / n portion of the entire image is formed as a fine pattern in each region.
- the fine pattern is formed in a fine pattern with a 1 / n portion of the entire image which is different in each region.
- the pattern cell has a circular, rhombic or polygonal shape.
- pattern cells are divided in the horizontal, vertical or diagonal directions.
- a security pattern film is a security pattern film for forming an image by combining with a plurality of microlens arrays.
- the security pattern film includes a fine pattern for patterning an image on a pattern cell area on one side of a transparent resin film And a plurality of the pattern cells are arranged to form a pattern cell array, wherein the pattern cell is divided into n regions by virtue of an imaginary line, and the pattern region is formed in one of the n divided regions 1 / n part of the entire image is formed as a fine pattern, and the pattern cell array includes N pattern cells arranged to form a pattern cell block, M pattern cell blocks (n, N and M Wherein the fine pattern is shifted in position with respect to the neighboring pattern cells in the pattern cell block, With respect to the pattern cell block smiling characterized in that the position variations within the pattern cell.
- fine patterns are formed in at least two of the n divided regions, and a spaced 1 / n portion of the entire image is formed as a fine pattern in each region.
- the pattern cell includes a first region in which a 1 / n portion of the first image is formed into a fine pattern and a second region in which a 1 / n portion of the second image is formed in a fine pattern.
- first region and the second region are adjacent to or spaced from each other.
- the fine pattern of the first region is formed in a relief pattern
- the fine pattern of the second region is formed in a relief pattern
- n may be 5 or 10.
- the pattern cell is divided into a plurality of regions, pigment is filled only in a fine pattern of a partial area contributing to image realization, and there is no interference by the pigment in the peripheral region, thereby improving the visibility of the image.
- FIG. 1 is a cross-sectional view showing a general configuration of a security film
- FIG. 2 is a plan view showing a pattern cell of a currency security film according to a conventional technique
- FIG. 3 is a plan view of a pattern cell according to an embodiment of the present invention.
- FIG. 4 is a plan view showing an array structure of a pattern cell according to the embodiment of FIG. 3,
- FIG. 5 is a plan view showing a first pattern cell block for the pattern cell array of FIG. 4,
- FIG. 6 is a plan view showing representative pattern cells of the first pattern cell block and the second pattern cell block for the pattern cell array of FIG. 4;
- FIG. 7 is a plan view of a pattern cell according to another embodiment of the present invention.
- FIG. 8 is a plan view showing a first pattern cell block formed of a pattern cell according to the embodiment of FIG. 7,
- FIG. 9 is a plan view showing representative pattern cells of a first pattern cell block and a second pattern cell block formed of a pattern cell according to the embodiment of FIG. 7; FIG.
- FIG. 3 is a plan view showing a pattern cell according to an embodiment of the present invention
- FIG. 4 is a plan view showing an array structure of a pattern cell according to the embodiment of FIG. 3
- FIG. 6 is a plan view showing a representative pattern cell of the first pattern cell block and the second pattern cell block with respect to the pattern cell array of FIG. 4;
- the pattern cell 100 has a circular shape having a predetermined diameter.
- the pattern cell 100 may have a diameter of 10 ⁇ m to 50 ⁇ m, and preferably a diameter of 20 ⁇ m to 30 ⁇ m. As the diameter of the pattern cell 100 becomes narrower, it is advantageous for slimming down the security film, but the pattern is difficult to implement. The wider the diameter of the pattern cell 100, the better the pattern realization, It is disadvantageous to the slimming of.
- the pattern cell 100 may have a polygonal shape such as a rectangular shape, a rhombus shape, a honeycomb shape, etc. in addition to a circular shape.
- the pattern cell 100 is formed with a fine pattern 110 in which letters, numbers, or images (hereinafter referred to as "images") are formed.
- images letters, numbers, or images
- a plurality of pattern cells 100 having fine patterns 110 are arranged in a horizontal, vertical, diagonal, or arbitrary direction to form a pattern cell array, and a microlens array in which a plurality of microlenses are arranged thereon, Unmatched.
- the combination of the pattern cell array and the microlens array provides an image of a specific shape to the user along the direction of looking through the microlens array.
- the formation of the fine pattern 110 can be performed by a semiconductor process.
- the fine pattern 110 may be manufactured by forming a wafer mold by a process such as masking, exposure, and etching after designing a pattern, molding a soft mold by using a wafer mold, To a transparent synthetic resin film.
- the pattern of the embedded structure formed by the semiconductor process can realize the nano pattern fine pattern.
- the fine pattern is filled with a pigment in a recess portion, whereby an image is formed.
- the pattern cell 100 of the present embodiment is divided into a plurality of regions with a predetermined diameter and an inner region with respect to the vertical direction. That is, the pattern cell 100 may be divided into 5, 10, or any other n regions in the longitudinal direction (where n is an integer of 2 or more). In this embodiment, 5 area).
- the plurality of divided regions are virtual regions divided by imaginary lines L, and each region may be divided into a horizontal direction, a diagonal direction, or an arbitrary direction in addition to the vertical direction.
- the regions of the first to fifth regions (1 to 5) preferably have the same width and may have different widths.
- the first to fifth regions (1 to 5) divide the image implemented by the entire pattern cell 100 into five parts.
- the first to fifth regions (1) to (5) correspond to images corresponding to the first to fifth portions, and the fine pattern 110 in one pattern cell corresponds to any one of the first to fifth regions And a divided image of a portion corresponding to each region in the region. Therefore, the fine pattern 110 is also divided by the number of divided areas, and each area corresponds to each part of the fine pattern 110 divided into five parts.
- a divided partial image is implemented by filling a pigment into a fine pattern 110 in an area divided into five parts.
- the fine pattern 110 is composed of a partial image formed in the first region (1) of the five divided regions in the pattern cell 100, Seth is filled with pigment. Accordingly, only the fine pattern 110 in the region filled with the pigment is visible to the outside, so that only a part of the image is formed in one pattern cell 100. Filling of the pigment can be performed by a printing process using gravure type doctor blading.
- the pigment is printed only in the first area (1) corresponding to 1/5 of the entire area, and the remaining 4/5 area (2 to 5) Can be reduced by about 80%. Since the pigment color of the second region to the fifth region (2 to 5) is not visually observed with respect to the entire region of the pattern cell 100, the image displayed by the fine pattern 110 in the first region (1) The visibility of the image is improved.
- the fine pattern 110 is applied to only the first region (1) in the pattern cell 100 divided into a plurality of regions, the fine pattern 110 may be applied to two or more regions. That is, the pattern cell 100 includes at least one region in which the fine pattern 110 is not applied among the plurality of divided regions.
- the pattern cells 100 are arranged such that even when only a part of the image is formed, the plurality of pattern cells 100 form an array in the horizontal, vertical, diagonal, and arbitrary directions, It can be viewed outside, and the image can be varied in various ways depending on the viewing direction of the user.
- the shape of the partial image formed by the fine pattern 110 is configured to transition slightly in the horizontal, vertical, diagonal, or arbitrary direction with respect to the adjacent pattern cells 100.
- the pattern cells 100 constitute a plurality of pattern cell arrays arranged in the horizontal direction.
- the pattern cells 100 may be further arranged in a vertical, diagonal, or arbitrary direction.
- the pattern cells 100 are arranged with a pitch of about 1,016 LPI.
- a plurality of pattern cells form a pattern cell block, and a plurality of pattern cell blocks form a pattern cell array. That is, the pattern cell array according to the present embodiment includes arbitrary M pattern cell blocks 100A, 100B ... 100M, and each of the pattern cell blocks 100A, 100B, ..., Cell 100 as shown in FIG.
- M and N are integers equal to or more than 2, and are appropriately determined on the basis of the total size of the pattern array, the skew of the pattern cell, the number of divided areas inside the pattern cell, the number of fine pattern areas in the pattern cell, Can be set.
- the first pattern cell block 100A includes N pattern cells 100A-1, 100A-2, ..., 100A-N, -2 ... 100A-N are divided into five regions (1) through (5), and a fine pattern forms an image in a specific region, for example, the first region (1).
- the image of the second pattern cell 100A-2 is shifted by 0.22 m to a predetermined distance, for example, leftward in comparison with the image of the first pattern cell 100A-1,
- the image of the cell 100 moves 0.22 m to the left in comparison with the image of the second pattern cell 100A-2 and the image of the Nth pattern cell 100A-N moves to the N-1th pattern cell 100A- N-1)) and moves to the left by 0.22 m.
- the interval at which the image moves can be arbitrarily set based on the forehead of the pattern cell, the number of divided areas inside the pattern cell, the number of pattern cells forming the block, and the like.
- a partial image of a fine pattern is formed in the same n-th region for each of the pattern cells constituting the same block, and the image of the n-th region in each neighboring pattern cell in the same block is And is configured to move in the horizontal direction, the vertical direction, the diagonal direction, or any direction within the n-th region.
- a pattern cell according to the present embodiment differs in a region where fine patterns are formed in a plurality of regions formed in a pattern cell between neighboring pattern cell blocks 100A and 100B. That is, the neighboring pattern cell block is configured so that the region where the partial image is shaped in the pattern cell is varied.
- each of the pattern cells 100A-1 to 100A-N constituting the first pattern cell block 100A a partial image formed by the fine pattern is formed in the first region (1)
- Each of the pattern cells 100B-1 to 100B-N constituting the first M-type pattern cell block 100M has a partial image formed by a fine pattern in the second area (2)
- a partial image by a fine pattern is formed in an arbitrary n-th region. That is, after a partial image of a fine pattern in an area of a pattern cell in a specific pattern cell block is moved to the last pattern cell, a partial image by a fine pattern in the next area of the next pattern cell block of the neighboring pattern cell block .
- the variation of the area where the image is formed with respect to the plurality of neighboring pattern cell blocks 100A, 100B, ..., 100M may be continuous or discontinuous, and the distance between the neighboring two pattern cell blocks 100A, The variation of the area where the image is formed may be one area or more than two areas.
- the pattern cell 100 is divided into five regions (1) to (5), when the region where the image is formed in an arbitrary pattern cell block is the last fifth region (5) The region where the image is formed is again shifted to the first region (1). Accordingly, each pattern cell block is divided according to whether the region in which the image is formed in the neighboring pattern cells changes.
- the pattern cell array of the present embodiment is capable of correcting the image of the entire shape to the user by matching or mismatching with the microlens array by shifting the image within a specific region or region by region even if the image is partially formed only in a partial region in the pattern cell Or provide images of variously changing shapes. Furthermore, since each pattern cell does not receive the interference of the pigment from the neighboring regions, a clear image can be provided.
- FIG. 7 is a plan view showing a pattern cell according to another embodiment of the present invention
- FIG. 8 is a plan view showing a first pattern cell block formed of a pattern cell according to the embodiment of FIG. 7
- FIG. 9 is a cross-
- FIG. 5 is a plan view showing representative pattern cells of a first pattern cell block and a second pattern cell block formed of pattern cells according to FIG.
- different images are formed in a plurality of regions in the pattern cell.
- the pattern cell 100 is divided into first to fifth regions (1) to (5), and the first region (1) A fine pattern 110-1 is formed, and a second fine pattern 110-2 is formed in the fourth region (4) to shape the second image.
- the first fine pattern 110-1 and the second fine pattern 110-2 are formed only in the portion corresponding to the first region 1 and the fourth region 4 with respect to the entire region inside the pattern cell 100, .
- the first fine pattern 110-1 and the second fine pattern 110-2 may be different partial images of one and the same image but are preferably partial images forming different images.
- the first fine pattern 110-1 may be formed as a pattern that shapes a portion corresponding to the first region (1) with respect to the 'vertical' image, and the second fine pattern 110 - And a pattern for shaping a portion corresponding to the fourth area (4) with respect to the image of the '100' shape.
- the region where the first fine pattern 110-1 is formed and the region where the second fine pattern 110-2 is formed may be adjacent to each other or may be spaced apart by a predetermined distance.
- the pattern cell 100 is divided into a plurality of regions, and fine patterns are formed to form different images in a plurality of different regions.
- a plurality of different images are formed inside one pattern cell 100 to the outside It can be implemented to be visible.
- each image is patterned to a size corresponding to the entire area of the pattern cell 100, so that a clear image can be realized.
- the first fine pattern 110-1 is formed in an engraved pattern and the second fine pattern 110-2 is formed in a relief pattern in the fine pattern 110 formed in the pattern cell 100.
- the fine patterns 110-1 and 110-2 for forming different images form different concave-convex structures such as engraved and embossed, the first image and the second image that they form can be seen more clearly .
- the visibility of the image represented by the fine patterns of different concavo-convex structures becomes more apparent when the images are formed by depositing silver or gold on each of the fine patterns 110-1 and 110-2.
- a plurality of pattern cells 100 according to the present embodiment form a pattern cell block, and a plurality of pattern cell blocks form a pattern cell array (see FIG. 5).
- the first region (1) 4) are configured to transition slightly in the horizontal, vertical, diagonal, or arbitrary direction with respect to the neighboring pattern cells 100A-1 and 100A-2.
- each of the pattern cells 100A-1, 100A-2 ... 100A-N of the first pattern cell block 100A has an image formed in the first area (1) and the fourth area (4)
- the image of each pattern cell 100B-1, 100B-2 ... 100B-N of the second pattern cell block 100B is formed in the second area (2) and the fifth area (5).
- the pattern cell array for patterning different images in one pattern cell allows different images to be sequentially viewed according to the direction of the matching or non-matching with the microlens array. At this time, if a region to be divided in the pattern cell is increased, for example, a morphing animation effect can be realized when the pattern cell is divided into 10 regions.
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Abstract
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Claims (13)
- 마이크로 렌즈 어레이와 패턴 셀 어레이가 조합되어 이미지를 형상화하는 보안용 패턴 필름에 있어서, 상기 패턴 셀 어레이는,투명수지 필름 일면의 패턴 셀 영역에 이미지를 형상화하기 위한 미세 패턴이 형성되고, 상기 미세 패턴의 리세스 부분에 안료를 충진하여 상기 미세 패턴의 이미지를 형상화하며,상기 패턴 셀은, 내부 영역이 가상의 선에 의하여 다수의 n 개의 영역으로 분할되고(상기 n 은 2 이상의 정수), n 개의 분할 영역 중 어느 하나의 영역에 전체 이미지의 1/n 부분이 미세 패턴으로 형성되어, 이미지의 시인성을 향상시킨 보안용 패턴 필름.
- 제1항에 있어서, 상기 미세 패턴은,임베디드 구조를 이루는, 시인성을 향상시킨 보안용 패턴 필름.
- 제2항에 있어서, 상기 임베디드 구조는,패턴 설계, 마스킹, 노광 및 식각 과정으로 웨이퍼 금형을 제작하고, 제작된 상기 웨이퍼 금형으로 소프트 몰드를 성형하여, 패턴을 상기 투명수지 필름에 전사하여 이루어지는, 시인성을 향상시킨 보안용 패턴 필름.
- 제1항에 있어서, 상기 패턴 셀은,n 개의 상기 분할 영역 중 이격된 둘 이상의 영역에 미세 패턴이 형성되고,각 영역에는 전체 이미지의 이격된 1/n 부분이 미세 패턴으로 형성되는, 시인성을 향상시킨 보안용 패턴 필름.
- 제4항에 있어서, 상기 미세 패턴은,각 영역에 서로 다른 전체 이미지의 1/n 부분이 미세 패턴으로 형성되는, 시인성을 향상시킨 보안용 패턴 필름.
- 제1항에 있어서, 상기 패턴 셀은,원, 마름모 또는 다각 형상을 이루는, 시인성을 향상시킨 보안용 패턴 필름.
- 제1항에 있어서, 상기 패턴 셀은,가로, 세로 또는 대각선 방향으로 분할되는, 시인성을 향상시킨 보안용 패턴 필름.
- 다수의 마이크로 렌즈 어레이와 조합되어 이미지를 형성하는 보안용 패턴 필름에 있어서,투명수지 필름의 일면의 패턴 셀 영역에 이미지를 형상화하기 위한 미세 패턴이 형성되고, 다수의 상기 패턴 셀이 배열되어 패턴 셀 어레이를 형성하며,상기 패턴 셀은, 내부 영역이 가상의 선에 의하여 n 개의 영역으로 분할되고, 상기 n 개의 분할 영역 중 어느 하나의 영역에 전체 이미지의 1/n 부분이 미세 패턴으로 형성되며,상기 패턴 셀 어레이는, N 개의 상기 패턴 셀이 배열되어 패턴 셀 블록을 이루고, M 개의 상기 패턴 셀 블록이 배열되며(상기 n, N 및 M 은 2 이상의 정수),상기 미세 패턴은, 상기 패턴 셀 블록 내의 이웃하는 상기 패턴 셀에 대하여 위치가 변이하고,상기 미세 패턴이 형성되는 영역은, 이웃하는 상기 패턴 셀 블록에 대하여 상기 패턴 셀 내에서 위치가 변이하여,이미지의 시인성을 향상시킨 보안용 패턴 필름.
- 제8항에 있어서, 상기 패턴 셀은,n 개의 상기 분할 영역 중 둘 이상의 영역에 미세 패턴이 형성되고,각 영역에는 전체 이미지의 이격된 1/n 부분이 미세 패턴으로 형성되는, 시인성을 향상시킨 보안용 패턴 필름.
- 제9항에 있어서, 상기 패턴 셀은,제1 이미지의 1/n 부분이 미세 패턴으로 형성된 제1 영역과, 제2 이미지의 1/n 부분이 미세 패턴으로 형성된 제2 영역을 포함하는, 시인성을 향상시킨 보안용 패턴 필름.
- 제10항에 있어서, 상기 제1 영역과 상기 제2 영역은,인접하거나 이격되는, 시인성을 향상시킨 보안용 패턴 필름.
- 제10항에 있어서,상기 제1 영역의 미세 패턴은 음각 패턴으로 형성되고, 상기 제2 영역의 미세 패턴은 양각 패턴으로 형성되는, 시인성을 향상시킨 보안용 패턴 필름.
- 제8항에 있어서, 상기 n 은,5 또는 10 인, 시인성을 향상시킨 보안용 패턴 필름.
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