WO2014175540A1

WO2014175540A1 - Lenticular lens sheet with hidden effect

Info

Publication number: WO2014175540A1
Application number: PCT/KR2014/001163
Authority: WO
Inventors: 안병학
Original assignee: An Byunghak
Priority date: 2013-04-24
Filing date: 2014-02-12
Publication date: 2014-10-30
Also published as: KR101324764B1

Abstract

Disclosed is a lenticular lens sheet comprising: a first lenticular lens layer having a plurality of semicircular convex lenses continuously arranged thereon in parallel; a second lenticular lens layer arranged on the lower part of the first lenticular lens layer and having a plurality of semicircular convex lenses continuously arranged thereon in parallel; a focal distance forming layer arranged on the lower part of the second lenticular lens layer; and a printing layer arranged in a focal distance of the first lenticular lens layer and the second lenticular lens layer. The printing layer in the lenticular lens sheet, according to the present invention, has repetitive patterns in which a plurality of identical shapes are formed and are arranged at an array spacing with the size of 1-0.99 times as large as a lenticular lens cell formed by intercrossing the lenticular of the first lenticular lens layer and the lenticular of the second lenticular lens layer, and the printing layer includes hidden effect printing parts arranged in the same array direction as the array direction of the lenticular lens cell. Thus, when a user views the repetitive patterns printed on the hidden effect printing parts by putting the lenticular lens sheet at a distance from his or her eyes, the patterns printed on the hidden effect printing parts are not seen or seen as blurry expanded images, and when the user views the repetitive patterns by putting the lenticular lens sheet near his or her eyes, the printed patterns can be seen as clear images.

Description

Lenticular lens sheet with hidden effect

The present invention relates to a lenticular lens sheet imparted with a hidden effect, and more particularly, when the eye is removed from the lenticular lens sheet, the shape of the printed repetitive pattern is not seen or is blurred and the eye is lenticular. The present invention relates to a lenticular lens sheet imparted with a hidden effect by having a hidden effect printing portion as a printed layer, in which the printed pattern is seen as a clear image when viewed close to the lens sheet.

A device for forming a stereoscopic image is a device that allows a viewer to see different images with the left eye and the right eye so as to feel a sense of distance and stereoscopic feeling in such an image. In order to form a stereoscopic image in such a device, it is essential to adjust the focal length for the left and right eyes.

Patent Registration No. 10-0786860 (Dec. 11, 2007) discloses a stereoscopic image display device having a variable focus lens, which vertically intersects a vertical lenticular lens plate and a horizontal lenticular lens plate. The variable focus lens unit is formed. In this case, the intersection point is disposed to correspond to each pixel of the flat panel display. The variable focus lens has a fixed focal length by an optical combination of a vertical lenticular lens and a horizontal lenticular lens in a state where no voltage is applied, but focuses by changing the arrangement state of the liquid crystal bunders of the liquid crystal layer by application of voltage. The distance is changing. Accordingly, even if the image is formed on the same plane, the depth sense perceived by the viewer is changed due to the change of the focal length formed in the variable focus lens unit, so that the viewer feels a three-dimensional feeling.

Patent registration No. 10-1025579 (registered on March 22, 2011) discloses a lenticular switch that can adjust to show or disappear a stereoscopic image according to the focal length, which is the gap between the upper plate where the lens is formed and the lower plate where the pattern is formed. Spacers are installed to float. If the pattern printed on the bottom plate is located at the focal length while the gap between the top plate and the bottom plate is separated by the spacer, the pattern is well visible. At this time, when the top plate is pressed to contact the bottom plate, the distance between the top plate and the bottom plate is changed. As a result, the pattern deviates from the focal length and the pattern becomes invisible. This patent does not change the focal length of the lens, but achieves the desired effect by moving the printed pattern located at the focal length of the lens to a non-focal distance.

Utility Model Registration No. 20-0311905 (registered Apr. 17, 2003) discloses a radial convex lens three-dimensional printing sheet, which is a non-focal length under a non-focal distance under a convex lens layer formed by arranging convex lenses in a predetermined pattern. A printed layer was formed, and a lens transparent layer and a lens focal length printed layer were formed in that order. Here, the non-focal distance printed layer has 4 degree (CMYK) primary color printing, which is out of the focal length and thus has no three-dimensional effect or special effect. If the 4th degree primary color printing is placed at the focal length, the moiré phenomenon may be severe and then the print may not be visually recognized, so the 4th degree primary color printing cannot be put at the focal length. On the other hand, the position of the print capable of expressing the three-dimensional effect should be placed on the lens focal length printed layer. Therefore, this patent provides perspective by placing a print expressing a three-dimensional effect on a lens focal length print layer, and a 4-degree primary color print corresponding to a background at a nonfocal distance, that is, by placing prints at different positions. .

On the other hand, Utility Model Registration No. 20-0444099 (2009. 04. 02. registration) discloses a three-dimensional printing sheet, which is a four-degree primary color (CMYK) offset printing layer on the focal length of the convex lens on the bottom of the convex lens layer. The printed layers are formed together on the same line. At this time, the four-degree primary color (CMYK) offset printing layer is formed to have a dot array angle different from that of the convex lenses, and the printed layer has the same dot array angle as that of the convex lenses, The shape has been reduced to less than 98%. This patent imparts a perspective between the 4-degree primary color offset printing layer and the printed layer by this arrangement, and the 4-degree primary color offset printing layer is not affected by the convex lens even when printed on the focal length of the convex lens. Explain that it looks visually as it is.

On the other hand, Patent Registration No. 10-1084361 (registered November 11, 2011) discloses a three-dimensional lens sheet for color expression, which is the first lenticular lens layer and the second lenticular lens layer and three-dimensionally arranged in a cross shape with each other Layer. Here, the three-dimensional layer forms irregularities so that the desired color is expressed at a desired position by adjusting the angle of the surface on which the illumination is reflected. This patent three-dimensionally formed a printed layer for color expression.

The present inventors have endeavored to produce a lenticular lens sheet that provides a novel effect not presented in the prior art and has thus come to the present invention. It is therefore an object of the present invention to provide a lenticular lens sheet that provides a novel effect that is not conventionally provided.

Specifically, an object of the present invention is that when the eye is seen from the lenticular lens sheet, the shape of the printed repetitive pattern is invisible or blurry magnified image, and when the eye is placed close to the lenticular lens sheet, the printed pattern is printed. It is to provide a lenticular lens sheet imparted with a hidden effect by having a hidden effect printed portion in which a pattern is seen as a clear image as a printing layer.

In order to achieve the above object, a lenticular lens sheet provided with a hidden effect according to the present invention includes a first lenticular lens layer in which a plurality of semi-circular convex lenses are arranged in parallel and in succession; A second lenticular lens layer disposed below the first lenticular lens layer and having a plurality of semi-circular convex lenses arranged in parallel and in succession; A focal length forming layer disposed under the second lenticular lens layer; And a printing layer disposed at a focal length with respect to the first lenticular lens layer and the second lenticular lens layer.

An array direction of the semi-circular convex lenses arranged in the first lenticular lens layer intersects an array direction of the semi-circular convex lenses arranged in the second lenticular lens layer in an angle range of 45 to 135 degrees, and the first lenticular The lenticular surfaces of the lens layer and the second lenticular lens layer are disposed to face each other.

The printed layer has an array of 0.99 to 1.01 times the size of the lenticular lens cell, in which a plurality of repetitive patterns having the same shape are formed by the intersection of the lenticular of the first lenticular lens layer and the lenticular of the second lenticular lens layer. A hidden effect printing portion arranged at intervals and arranged in the same alignment direction as the arrangement direction of the lenticular lens cell, wherein the repetitive pattern printed on the hidden effect printing portion is when the eye is viewed from the lenticular lens sheet. When the pattern printed on the hidden effect printing unit is invisible or blurred, the image is seen, and when the eye is placed close to the lenticular lens sheet, the printed pattern is seen as a clear image.

Preferably, the first lenticular lens layer and the second lenticular lens layer are arranged at 50 to 300 LPI.

The printed layer does not have a repeating pattern in an array form regardless of the arrangement direction of the lenticular lens cells formed by the intersection of the lenticulars of the first lenticular lens layer and the lenticulars of the second lenticular lens layer and the size of the lens cells. It is preferable to further include a main printing portion formed in a shape.

The main print portion is formed at the center of the print layer, the hidden effect print portion is printed around the main print portion, and the main print portion and the hidden effect print portion is preferably formed by planar printing on the same plane. Do.

Each of the same shape of the repetitive pattern printed on the hidden effect printing unit may be printed with a unique product number for the product to which the lenticular lens sheet is attached. Preferably, the lenticular lens sheet is attached to the product so as not to be detached from the product because the product is damaged when separated from the product. Thus, the lenticular lens sheet may serve as evidence of authenticity of the product.

The main printing unit is two superimposed images of two different images, and the two different images are superimposed or alternating by a phase difference between the left eye and the right eye according to the viewing angle. The lenticular lenses It is preferable that it is comprised with a conversion lens.

In the lenticular lens sheet of the present invention, the repetitive pattern of the hidden effect printing unit is arranged at the same array interval as the size of the lenticular lens cell, and also arranged in the same array direction as the lenticular lens cell, so that the eye is sufficiently hidden when viewed from the lenticular lens sheet. The pattern of the effect printing part is invisible or blurred and the image is seen, and when the eye is placed close to the lenticular lens sheet, the pattern of the hidden effect printing part is displayed as a clear image. This lenticular lens sheet can be used as proof that the product is genuine by printing a unique serial number on the hidden effect printing section and attaching it inseparably from the product. In addition, since the lenticular lens sheet of the present invention is formed by printing the main printing unit and the hidden effect printing unit together by planar printing on the same plane, the structure is simple and the manufacturing method is simple, economical and high utilization.

1 is a view showing a schematic structure of a lenticular lens sheet according to an embodiment of the present invention.

2 is a view for explaining the size of the lens cell in the lenticular lens sheet of the present invention.

3 is a view for explaining the arrangement form and the interval of the repeating pattern printed on the hidden effect printing unit of the printing layer applied to the lenticular lens sheet of the present invention.

4 is a background printing unit in which a repetitive pattern is arranged at an array interval sufficiently smaller than the arrangement interval of the pattern of the hidden effect printing unit defined by the present invention as an example of the lenticular lens sheet compared to the lenticular lens sheet of the present invention. 1 is a view showing one specific image of one conversion form of the lenticular lens sheet having a conversion function in the main printing unit.

FIG. 5 is a diagram illustrating another specific image in the transformation form of the lenticular lens sheet of FIG. 4.

FIG. 6 is a diagram illustrating a specific image in which the specific images of FIGS. 4 and 5 overlap.

FIG. 7 is a view illustrating a blurred image of a pattern of a hidden effect printing unit when viewed from a state where an eye is sufficiently taken from a lenticular lens sheet having a conversion function according to an embodiment of the present invention.

FIG. 8 is a view showing that the pattern of the hidden effect printing unit is seen as a clear image when viewed with the eye close to the lenticular lens sheet of FIG. 7.

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

As shown in FIG. 1, the lenticular lens sheet 10 of the present invention may have a first lenticular lens layer 100, a second lenticular lens layer 200, and a focal length forming layer 300 in order from top to bottom. And a print layer 400.

The first lenticular lens layer 100 and the second lenticular lens layer 200 have a structure in which a plurality of semi-circular

convex lenses

110 and 210 are arranged in parallel and in succession, respectively. The arrangement direction of the semi-circular

convex lenses

110 and 210 is the first lenticular lens layer 100 and the second lenticular lens layer 200 so as to intersect with respect to each other, the intersection angle of such an arrangement direction is in the range of 45 ~ 135 degrees It is preferable to achieve a 90 degree angle. In addition, the lenticular curved surfaces of the first lenticular lens layer 100 and the second lenticular lens layer 200 may be disposed to face each other.

The focal length forming layer 300 disposed below the second lenticular lens layer 200 serves to adjust the distance so that the focal length of the lens formed by the lenticular lens layers 100 and 200 is formed on the printing layer 400. It is.

The printing layer 400 disposed at the focal length of the lens includes a main printing unit 410 formed in the center portion and a hidden effect printing unit 420 formed in the peripheral portion. The main printing unit 410 is a printed layer regardless of the arrangement direction of the lenticular lens cell and the size of the lens cell formed by the intersection of the lenticular of the first lenticular lens layer 100 and the lenticular of the second lenticular lens layer 200. The central portion of the 400 is formed in a shape having no arrangement pattern. Hidden effect printing unit 420 is a plurality of repetitive patterns of the same shape is printed around the main printing unit 410 in the same alignment direction as the arrangement direction of the lenticular lens cells and is substantially the same size as the size of the lenticular lens cell It is arranged to have an array interval, that is, to have an array interval of 0.99 to 1.01 times the size of the lenticular lens cell. It is more preferable that the interval of arrangement of the repetitive patterns printed on the hidden effect printing unit 420 has a size of 0.999 to 1.001 times, and more preferably 0.9999 to 1.0001 times.

The main printing unit 410 and the hidden effect printing unit 420 is preferably formed by planar printing on the same plane. Here, the same plane means that the printing layer 400 is formed in one plane, and planar printing means a substantially three-dimensional means, that is, perpendicular to the size of the lenticular lens cell in the plane of the printing layer 400. It simply means printing without finding a means. The two images are printed by overlapping the vertical height at the overlapping portion of the ink, but since the height of the ink layer is very small compared to the size of the lenticular lens cell, it is not a practical three-dimensional means.

2 is a view for explaining the size of the lens cell in the lenticular lens sheet of the present invention. As shown in FIG. 2, the size of the lenticular lens cell may be defined as the width of the lenticular lens, that is, the semicircular convex lens or the diameter of the semicircle of the convex lens. Since the lenticular lens cell employed in the present invention is formed by the intersection of the first lenticular lens layer 100 and the second lenticular lens layer 200, they appear to be square when they cross at an angle of 90 degrees. Thus, the size of the lens cell can be defined as the length of one side of such square. In the lenticular lens sheet of the present invention, the lenticular array of the first lenticular lens layer 100 and the second lenticular lens layer 200 is preferably arranged at 50 to 300 LPI.

3 is a view for explaining the arrangement form and the interval of the repeating pattern printed on the hidden effect printing unit of the printing layer applied to the lenticular lens sheet of the present invention. For example, in a lenticular lens sheet having a lenticular lens cell size of 0.127 mm, an interval of arrangement of patterns of the same shape printed on the hidden effect printing unit 420 of the printing layer 400 may have a value of, for example, 0.1265 mm. In this case, as shown in FIG. 7, the image of the hidden effect printing unit 420 is invisible or blurred when the eye is removed from the lenticular lens sheet 10. As shown in the enlarged image, and as shown in FIG. 8, the printed pattern 420 appears as a clear image when the eye is placed close to the lenticular lens sheet 10.

On the other hand, when the pattern is formed smaller than the size of the arrangement interval of the above-described pattern, as shown in Figs. 4 to 6, the hidden effect does not occur. Therefore, unlike the present invention, the background printing unit shown in FIGS. 4 to 6 cannot be called a hidden effect printing unit, and will be described by only naming the background printing unit. However, the same reference numerals are used.

Utility Model Registration No. 20-0444099 forms a background printing unit 420 in the form of a convex lens having a concave lens angle of 98% or less while having the same concave lens array angle as that of convex lenses. When the main printing unit 410 is formed in the center, the background printing unit 420 has a depth sense as compared with the main printing unit 410. When the background printing unit 420 has the size of such an arrangement interval, the background printing pattern of the background printing unit 420 when the eye is sufficiently taken off from the lenticular lens sheet as shown in FIGS. The image of the main printing unit 410 is generally seen clearly. Also, if you move your eyes up and down or left and right, the background print pattern will follow. Therefore, the lenticular lens sheet can be used for decorative purposes by making the three-dimensional feeling by the relative perspective between the main printing unit 410 and the background printing unit 420.

On the other hand, as in the conventional lenticular lens sheet 10, the main printing unit 410 is two different images are printed superimposed on the two different images due to the phase difference between the left and right eyes according to the viewing angle. The overlapping or alternating conversion function may be implemented, and the lenticular lenses may be configured as conversion lenses. 4 to 6 illustrate a main printing unit in which a conversion function is implemented. 4 to 6 show caricature faces of the world-class singer Psy as an image of the main printing unit 410. Among them, FIG. 4 shows a state where sunglasses are placed on the face of Psy, and FIG. 5 shows a state without sunglasses on Psy's face. Each of these images is overlaid and printed on the main printing unit 410 with a slight gap. Then, at some position, the image of FIG. 4 is visible and at some positions, the image of FIG. 5 is visible. . On the other hand, in some locations, as shown in FIG. 6, the image of the sunglasses only covered with one eye can be recognized, which is a phenomenon in which the two images are partially overlapped. Such overlapping images can be clearly obtained by shooting with a camera.

Compared with the conventional lenticular lens sheet, the lenticular lens sheet 10 provided with the hidden effect according to the present invention has a repetitive pattern arrangement interval printed on the hidden effect printing unit 420 substantially equal to the size of the lenticular lens cell. Is set to. That is, it is set to have a size of 0.99 to 1.01 times, preferably 0.999 to 1.001 times, and more preferably 0.9999 to 1.0001 times the size of the lenticular lens cell. In this case, the printed pattern printed on the hidden effect printing unit is invisible or blurred enlarged when the eye is seen from the lenticular lens sheet, and the printed pattern is clear when the eye is placed close to the lenticular lens sheet. It looks like a video. Here, the eye is taken out of the lenticular lens sheet is a suitable distance for viewing the image printed on the main printing unit 410, the eye at a distance of about 10 to 60 cm, for example about 30 cm depending on the visual acuity. The eye is placed close to the lenticular lens sheet, which is too close to view the image printed on the main printing unit 410, and may vary depending on the eyesight. Say if you look. The closest eye contact can be seen clearly in the pattern of the hidden effect printing part even when approaching the distance of the thickness of the eyelid. An example of this is shown in FIGS. 7 and 8. 7 and 8 are diagrams of images taken by a camera.

In the present invention, when the arrangement interval of the repetitive pattern printed on the hidden effect printing unit 420 is set at substantially the same magnification with respect to the size of the lenticular lens cell, and the arrangement direction coincides with the arrangement direction of the lenticular lens cell, the lenticular lens In a state where the eyes are sufficiently opened, as shown in FIG. 7, the printed pattern printed on the hidden effect printing unit 420 is seen as a blurred image. If the eye is slightly moved in this state, the image of the blurred printed pattern may become invisible. When an eye sees a position between each image constituting the print pattern, each image constituting the enlarged print pattern is not visible. On the other hand, as shown in FIG. 8, when the eye is placed close to the lenticular lens sheet, the print pattern becomes smaller in size, and many individual images constituting the print pattern are visible, rather than individual images of one or two print patterns. However, such individual images appear as clear images.

Accordingly, each of the same shapes of the repetitive patterns printed on the hidden effect printing unit 420 may be printed with a unique serial number for the product to which the lenticular lens sheet 10 is attached. In such a case, the lenticular lens sheet 10 of the present invention may serve as proof that the product, such as the garment to which it is attached, is genuine. To this end, when the lenticular lens sheet 10 is separated from the product, the lenticular lens sheet 10 must be attached to the product so as not to be detached from the product. In this case, in order for the lenticular lens sheet 10 of the present invention to be used as evidence for authenticity, it must be easily recognized that the trained person is forged if it cannot be forged or forged. Specific details relating to the manufacture of the lenticular lens sheet of the present invention are kept secret and it is impossible to manufacture the exact same product without knowing such secret description, and such secret description disassembles the lenticular lens sheet of the present invention. Even if it is impossible to know exactly. Therefore, the lenticular lens sheet of the present invention can be used as evidence for authenticity if it is designed to have a condition where the phenomenon is clearly distinguished from a product having other conditions.

Meanwhile, one eye is represented by two eyes in FIG. 7 and FIG. 8 because the main print unit 410 having a conversion function is drawn as it is when it is photographed with a camera.

The lenticular lens sheet according to the present invention can be used as proof that the product is genuine by printing a unique product number on the hidden effect printing unit and attaching it inseparably from the product. In addition, since the lenticular lens sheet of the present invention is formed by printing the main printing unit and the hidden effect printing unit together by planar printing on the same plane, the structure is simple and the manufacturing method is simple, economical and high utilization.

Claims

A first lenticular lens layer in which a plurality of semi-circular convex lenses are arranged in parallel and in succession; A second lenticular lens layer disposed below the first lenticular lens layer and having a plurality of semi-circular convex lenses arranged in parallel and in succession; A focal length forming layer disposed under the second lenticular lens layer; And a printing layer disposed at a focal length with respect to the first lenticular lens layer and the second lenticular lens layer.

An array direction of the semi-circular convex lenses arranged in the first lenticular lens layer intersects an array direction of the semi-circular convex lenses arranged in the second lenticular lens layer in an angle range of 45 to 135 degrees, and the first lenticular The lenticular surfaces of the lens layer and the second lenticular lens layer are disposed to face each other.

The printed layer has an array of 0.99 to 1.01 times the size of the lenticular lens cell, in which a plurality of repetitive patterns having the same shape are formed by the intersection of the lenticular of the first lenticular lens layer and the lenticular of the second lenticular lens layer. A hidden effect printing portion arranged at intervals and arranged in the same alignment direction as the arrangement direction of the lenticular lens cell, wherein the repetitive pattern printed on the hidden effect printing portion is when the eye is viewed from the lenticular lens sheet. The hidden effect is characterized in that the printed pattern is invisible or blurred in an enlarged image, and when the eye is placed close to the lenticular lens sheet, the printed pattern appears as a clear image. Lenticular lens sheet.
The method of claim 1,

The lenticular lens sheet with a hidden effect, characterized in that the first lenticular lens layer and the second lenticular lens layer is arranged at 50 to 300 LPI.
The method according to claim 1 or 2,

The printed layer does not have a repeating pattern in an array form regardless of the arrangement direction of the lenticular lens cells formed by the intersection of the lenticulars of the first lenticular lens layer and the lenticulars of the second lenticular lens layer and the size of the lens cells. A lenticular lens sheet provided with a hidden effect, characterized in that it further comprises a main printing portion formed in a shape.
The method of claim 3,

The main print portion is formed in the center of the printing layer, the hidden effect printing portion is printed around the main printing portion, the main printing portion and the hidden effect printing portion is formed by the planar printing on the same plane A lenticular lens sheet given a hidden effect.
The method of claim 4, wherein

A lenticular lens sheet with a hidden effect, characterized in that each of the same shape of the repetitive pattern printed on the hidden effect printing portion is printed with a unique serial number for a product to which the lenticular lens sheet is attached.
The method of claim 5,

The lenticular lens sheet has a hidden effect, characterized in that when the product is separated from the product is damaged so that the product is attached so as not to be substantially detached from the product.
The method of claim 6,

The lenticular lens sheet has a hidden effect, characterized in that the lenticular lens sheet serves as evidence that the product is genuine.
The method of claim 4, wherein

The main printing unit is two superimposed images of two different images, and the two different images are superimposed or alternating by a phase difference between the left eye and the right eye according to the viewing angle. The lenticular lenses A lenticular lens sheet imparted with a hidden effect, characterized by comprising a conversion lens.