KR20110053009A - High-glossy stereoscopic sheet and method for fabricating the same stereoscopic sheet - Google Patents

Abstract

PURPOSE: A high-glossy stereoscopic sheet and method for manufacturing the same are provided to increase surface strength. CONSTITUTION: A high-glossy stereoscopic sheet comprises a pattern printing layer(100), a lens layer(200), a low refractive thin film layer(300), and a transparent resin layer(400). Stereoscopic patterns(110) are formed on the pattern printing layer. The lens layer is formed on the pattern printing layer. A plurality of convex lenses or a plurality of concave lenses are formed on the printing layer. The low refractive thin film layer is deposited on the lens layer. The transparent resin layer is formed on the low refractive thin film layer for high-glossy processing.

Description

High-glossy stereoscopic sheet and method for fabricating the same stereoscopic sheet

The present invention relates to a three-dimensional sheet capable of expressing a 3D image, and more particularly, to a three-dimensional sheet subjected to high-glossy treatment and a method for producing the three-dimensional sheet.

In general, two-dimensional patterns or images formed on a two-dimensional plane are recognized as two-dimensional because they are incident on the human eye in two-dimensional form through the reflection of light. However, when an optical lens sheet called a lenticular sheet is used, a two-dimensional image may be recognized as a three-dimensional (3D), that is, a three-dimensional image.

The principle of recognizing a two-dimensional image as a three-dimensional image using a lenticular sheet is due to the binocular disparity that appears because the human eye exists about 64 mm apart in the horizontal direction. Here, binocular parallax is a phenomenon in which the left and right eyes of a person are separated by a predetermined distance, so even if the image of the same position is different from the path of light coming into the left and right eyes, a slightly different image is formed in the left and right retinas. Say

Such a lenticular sheet is generally formed of transparent hemispherical lenses with an upper surface and a lower surface with a flat structure. In the case of such a lenticular sheet, a myriad of linear convex or concave lenses protrude, and the appearance is not beautiful, and the surface of the lenticular is convex and easily scratched or broken by external impact. Thus, another protective sheet is formed over the lens layer to protect it and keep the surface flat. However, forming the protective sheet over the lens layer has a problem in that it is expensive in terms of materials and processes because it must be formed in consideration of the refractive index of the lower lens layer, and still has a weak surface hardness.

The problem to be solved by the present invention is to provide a three-dimensional sheet including a protective layer that can be formed at a low cost while improving the surface hardness and a manufacturing method of the three-dimensional sheet.

In order to solve the above problems, the present invention is a pattern printing layer formed three-dimensional pattern giving a three-dimensional effect; A lens layer formed on the pattern printing layer and having a plurality of convex or concave lenses formed thereon; A low refractive thin film layer deposited on the lens layer in a thin film form and having a low refractive index; And a transparent resin layer formed on the low refractive thin film layer for high-glossy processing.

In the present invention, the low refractive thin film layer is formed to the same thickness as the upper portion of the lens layer, and may have the same shape as the lenses of the lens layer, the transparent resin layer is formed to have a flat upper surface (flat) Can be.

In addition, the present invention to solve the above problems, forming a plurality of convex or concave lenses on top of the lens layer having a predetermined refractive index; Forming a low refractive thin film layer on a predetermined portion on the lenses; Forming a transparent resin layer on the low refractive thin film layer for high-gloss processing; And printing a three-dimensional pattern for giving a three-dimensional effect to the lower portion of the lens layer.

In the present invention, in the forming of the low refractive thin film layer, the low refractive thin film layer is formed through a deposition method, so as to have the same thickness on the lens layer, and to have the same shape as the lenses of the lens layer. Can be formed.

Further, in the printing of the three-dimensional pattern, the three-dimensional pattern is printed with a predetermined rule to give the three-dimensional feeling to the focal position of the lenses, and after printing the three-dimensional pattern is concealed with a concealed resin between the three-dimensional patterns. Printing; may further include.

The high-gloss three-dimensional sheet and the method of manufacturing the three-dimensional sheet according to the present invention, after depositing a material having a low refractive index on the upper surface of the lens layer, a high-gloss treatment for flattening the upper surface of the three-dimensional sheet on the deposition surface By treating with a general transparent resin, it is possible to effectively overcome the high unit cost problem and the weak surface hardness of the low refractive transparent resin conventionally used for high-gloss processing.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, when an element is described as being present on top of another element, it may be directly on top of the other element, and a third element may be interposed therebetween. In the drawings, the thickness and size of each constituent element are exaggerated for convenience and clarity of description, and a portion not related to the description is omitted. Like numbers refer to like elements in the figures. It is to be understood that the terminology used is for the purpose of describing the present invention only and is not used to limit the scope of the present invention.

1 is a cross-sectional view of a high-gloss solid sheet according to an embodiment of the present invention.

Referring to FIG. 1, the high-gloss stereoscopic sheet of the present embodiment includes a printed pattern layer 100, a lens layer 200, a low refractive thin film layer 300, and a transparent resin layer 400.

The printed pattern layer 100 includes a three-dimensional pattern 110 and a concealed resin 120. The three-dimensional pattern 110 is formed at the focal length of the plurality of lenses 220 formed thereon, and is formed with a predetermined rule so that an appropriate three-dimensional shape can be seen. The three-dimensional pattern 110 may be generally formed through an offset-printing method. That is, a design is appropriately designed according to the shape to be implemented and the focal position of the lenses 220, and a plate for printing, that is, a plate is made based on the pattern, and a three-dimensional pattern is formed under the lens layer 200 through the plate. Will print

On the other hand, the three-dimensional pattern 110 can also be formed by etching (etching). The etching method uses photo mask devices. When the three-dimensional pattern is formed through the etching method, even an extremely fine pattern can be formed. Therefore, the etching method is advantageous to realize a three-dimensional sheet having a light and small shape.

Although the offset printing and etching methods are illustrated for the method of forming the three-dimensional pattern 110, the three-dimensional pattern may be formed through other methods without being limited thereto.

The concealed resin 120 is formed between the three-dimensional patterns 110 to distinguish the three-dimensional pattern 110 from each other. The concealed resin 120 is formed in a silk-screen manner, and the concealed resin 120 is formed to fill a gap between the three-dimensional patterns 110 already formed. Meanwhile, although the concealed resin 120 and the three-dimensional pattern 110 are formed to have the same thickness in the drawing, the thickness of the concealed resin 120 may be formed thicker than that of the three-dimensional pattern 110, and the three-dimensional pattern ( 110 and the concealed resin 120 may be formed to the same thickness, and a support resin may be further formed below the printed pattern layer 100. Concealed resin 120 is also not limited to the silk screen method can be formed in other ways, of course.

For reference, by forming the three-dimensional patterns 110 at the focal position of the lenses with a predetermined rule, the principle of making the three-dimensional feeling is as follows. That is, binocular parallax occurs because the left eye and the right eye of the person are separated by a predetermined distance, and the brain interprets the minute difference of the binocular parallax appropriately to feel a stereoscopic space. In order to maximize the stereoscopic recognition effect according to binocular parallax, the focal position of the lenses and the corresponding stereoscopic patterns should be accurately determined.

That is, based on the binocular parallax characteristic of the person, lenses corresponding to one left and right interval are bonded to the front of the patterns that can be displayed, and different left and right patterns on the left and right eyes are formed through the formed lenses. By making only visible, you can feel three-dimensional. For example, as in the present embodiment, a plurality of hemispherical lenses 220 are formed on the upper portion of the lens layer 200, and a predetermined three-dimensional pattern 110 is formed periodically below the lens layer 200. If the interval of the pattern and the hemispherical lens are properly matched, the left eye and the right eye recognize different patterns, so that the brain properly combines the images recognized from the left and right eyes to recognize the stereoscopic image. do.

The lens layer 200 includes a body portion 210 and a plurality of lenses 220. The lens layer 200 may be formed of a transparent resin, for example, polycarbonate (PC), and the upper lenses 220 may be formed by a thermoforming process using a mold having opposite curvature with the lens to be formed. have. This is described in more detail in the description of the high-gloss three-dimensional sheet manufacturing process of Figure 2a or less.

The lens layer 200 is not limited to a PC, but a transparent resin having a refractive index of about 1.45 to 1.58 such as polymethyl methacrylate, polyester, polyvinyl chloride, polystyrene, urethane acrylate and epoxy acrylate, as long as it is transparent The resin may have a refractive index of about 1.45 to 1.60 such as ester acrylate, or various resins such as polyethylene terephtalate (PET) and acrylonitrile butadiene styrene copolymer (ABS). However, it is a matter of course that an appropriate material should be selected in consideration of the refractive index of the lens, the thickness of the lens layer, and the overall three-dimensional sheet.

The low refractive thin film layer 300 should be formed of a material that is transparent and increases the refractive index change of the lower lens layer 200. That is, the difference between the refractive index of the lens layer 200 and the refractive index of the low refractive thin film layer should be within a predetermined range, for example, 0.2 to 0.3 or more. If it is less than 0.2 to 0.3, the refractive index does not change so much when the light is incident, so the focal length is not short enough. As a result, the distance of vision that can feel a three-dimensional effect is also farther away. Because you can't. Low refraction in the low refractive thin film layer means that it has a relatively low refractive index in relation to the lens layer.

As the low refractive thin film layer 300, an acrylate-based liquid resin, an epoxy, a urethane, or a resin such as silicone may be used. In the present exemplary embodiment, the low refractive thin film layer 300 is formed on the lens layer 200 through a deposition method unlike in the related art. As the deposition method, various deposition methods such as physical vapor deposition (PVD) and chemical vapor deposition (CVD) may be used depending on the material. However, low temperature CVD (LTCVD) may be preferable due to the characteristics of the material of the three-dimensional sheet.

Conventionally, the low refractive thin film layer 300 has been formed by a method such as knife coating, roll coating, spray coating, dip coating, squeegeeing, and the like, and thus has a very thick thickness. For example, it was applied thicker than the depth of typical lenses, for example 0.05 mm. On the other hand, as the low refractive thin film layer, materials having a refractive index of about 0.24 lower than that of the lens layer are mainly used. Such materials are generally very expensive and are expensive when they are thickly applied, and also because they are weak, they function as a protective film. I couldn't get it right.

In the present embodiment, the low refractive thin film layer 300 is formed very thin, for example, several micrometers to several hundred nm by using a deposition method. Thus, the problem of high cost of low refractive materials can be solved. In addition, when the deposition method is used, since the low refractive thin film layer 300 is formed with a uniform thickness on the upper surface of the lens layer 200 with the same thickness, the refractive index fluctuation according to the position of the lens does not occur.

The transparent resin layer 400 is applied onto the low refractive thin film layer 300 for high-gloss processing, and is generally formed by applying a liquid transparent resin and curing by irradiating UV (Ultraviolet) rays. In addition, the top surface of the transparent resin layer 400 should be flat in order to prevent refraction from occurring in contact with the air layer. Therefore, after apply | coating liquid transparent resin, all three-dimensional resin is made to pass through an extrusion apparatus etc., and the transparent resin which flattened the upper surface by the crimping to some extent is irradiated and hardened | cured by UV light.

The transparent resin layer 400 may be formed on the low refractive thin film layer 300 through other methods in addition to the above-described method if the top surface can be kept flat. On the other hand, since the transparent resin layer 400 is a part in direct contact with the outside, the transparent resin layer 400 is preferably formed of a material having a high surface hardness.

As described above, the high-gloss three-dimensional resin of the present embodiment can solve the high cost problem of the low refractive material by applying a thin film of the low refractive thin film layer through a deposition method, and also have a high hardness transparent resin layer formed thereon. This can significantly improve the durability of all three-dimensional resins. That is, by effectively preventing damage to the surface, it is possible to maintain the 3D image expression function of the three-dimensional resin for a long time.

2A to 2G are cross-sectional views illustrating a manufacturing process of a high-gloss three-dimensional sheet according to another embodiment of the present invention.

Referring to FIG. 2A, first, a mold 500 for forming a lens in a lens layer is prepared. The mold 500 includes an upper mold 520 in which the shape C of the lens is formed concave inside, and a lower mold 510 functioning as a support. If the lens formed in the lens layer is a concave lens, the shape of the lens may be formed in the upper mold 520 to be convex to the outside. For reference, one of the methods of forming the lens shape on the lens-shaped mold, that is, the upper mold 520, is applied to the substrate and patterned at a predetermined interval and then baked. PR swells with a constant radius of curvature due to its own properties such as surface tension. By transferring the PR shape thus formed to the upper mold, a lens shape can be formed in the upper mold.

Referring to FIG. 2B, a transparent resin 200a having a flat plate shape for forming a lens layer is disposed between the upper mold 520 and the lower mold 510. As the material of the transparent resin 200a, a transparent resin having a refractive index of about 1.45 to 1.60 may be used as described above in the description of FIG. 1, and a transparent resin 200a having an appropriate thickness in consideration of the focal length of the formed lens. ) Should be prepared. In this embodiment, PC fabric is used as the transparent resin 200a.

After the PC fabric is disposed between the upper mold 520 and the lower mold 510, the thermoforming compression process is performed to form the lenses 220 on the upper surface of the PC fabric.

FIG. 2C shows the lens layer 200 completed through the thermoforming process through the mold 500, and a plurality of lenses 220 are formed on the body portion 210 of the lens layer 200. You can check it.

Referring to FIG. 2D, after the lens layer 200 is formed, a low refractive material is applied to the upper surfaces of the lenses 220 using a deposition process in a thin layer, for example, a thickness of several μm to several hundreds nm, to form the low refractive thin film layer 300. To form. As described above, the low refractive thin film layer 300 should be formed of an appropriate material in consideration of the difference in refractive index with the lens layer. For example, when the lens layer is PC, it is preferable to select a material having a refractive index of about 0.24 or less, that is, about 1.35, because the refractive index of the PC is about 1.58 to 1.59. Meanwhile, various deposition methods may be used for depositing a low refractive material, but it is preferable to use the LTCVD method due to the characteristics of the resin.

Referring to FIG. 2E, a transparent resin layer 400 for high-gloss processing is formed on the low refractive thin film layer 300. The transparent resin layer 400 applies the liquid transparent resin to the surface of the low refractive thin film layer 300, and then passes the entire three-dimensional resin through an extrusion apparatus or the like, irradiating UV rays to the transparent resin whose flatness is flattened to some extent by pressing. It can be formed by curing. It is preferable that the transparent resin layer 400 selects a material having high surface hardness. That is, by forming a transparent resin layer made of a material having a high surface hardness in order to increase the durability of the three-dimensional resin, it is possible to prevent scratches or damage due to external impact, thereby maintaining the 3D image expression function of the three-dimensional resin for a long time. .

Referring to FIG. 2F, a three-dimensional pattern 110 for a three-dimensional image is formed on the lower surface of the lens layer 200. The three-dimensional pattern 110 may be formed at an appropriate position according to a predetermined interval or rule in consideration of the focal length and the expression shape of each lens for the three-dimensional effect. The three-dimensional pattern 110 may be formed by an offset-printing or etching method, but is not limited thereto.

Referring to FIG. 2G, the concealed resin 120 is formed over the entire lower surface of the lens layer 200 on which the three-dimensional pattern 110 is formed. The concealed resin 120 is formed in a silk-screen manner, and fills in between the three-dimensional patterns 110. Meanwhile, although the concealed resin 120 and the three-dimensional pattern 110 are formed to have the same thickness in the drawing, the thickness of the concealed resin 120 may be formed thicker than that of the three-dimensional pattern 110. Meanwhile, although the silk-screen method has been mentioned, the concealment resin 120 may be formed by various other methods, without being limited thereto.

The high-gloss three-dimensional sheet manufacturing method according to the present embodiment can solve the high cost problem of using a low refractive material by forming a very thin low refractive thin film layer on the upper surface of the lenses by using a deposition method, and also, a thin low refractive thin film layer. By forming a transparent transparent resin layer onto the phase, it is possible to overcome the problem of durability weakness of the three-dimensional sheet due to the weak surface hardness of the prior art.

While the present invention has been described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a cross-sectional view of a high-gloss solid sheet according to an embodiment of the present invention.

2A to 2G are cross-sectional views illustrating a manufacturing process of a high-gloss three-dimensional sheet according to another embodiment of the present invention.

<Description of main parts of drawing>

100: pattern printed layer 110: three-dimensional pattern

120: concealed resin 200a: transparent resin

200: lens layer 210: body portion

220: lens 300: low refractive thin film layer

400: transparent resin layer 500: mold

510: lower mold 520: upper mold

Claims (11)

A pattern printing layer having three-dimensional patterns giving a three-dimensional effect; A lens layer formed on the pattern printing layer and having a plurality of convex or concave lenses formed thereon; A low refractive thin film layer deposited on the lens layer in a thin film form and having a low refractive index; And And a transparent resin layer formed on top of the low refractive thin film layer for high-glossy processing. According to claim 1, The low refractive thin film layer is formed on the lens layer to the same thickness, high-gloss three-dimensional sheet, characterized in that the same shape as the lenses of the lens layer. The method of claim 2, The transparent resin layer is a high-glossy three-dimensional sheet, characterized in that the upper surface is formed flat. According to claim 1, The three-dimensional pattern is formed between the printing resin, is formed at the focal position of the corresponding lens, and a high-gloss three-dimensional sheet, characterized in that formed with a predetermined rule to give the three-dimensional effect. Forming a plurality of convex or concave lenses on top of the lens layer having a predetermined refractive index; Forming a low refractive thin film layer on a predetermined portion on the lenses; Forming a transparent resin layer on the low refractive thin film layer for high-gloss processing; And Printing a three-dimensional pattern for giving a three-dimensional effect to the lower portion of the lens layer. 6. The method of claim 5, In the forming of the lenses, The lens is a method of manufacturing a high-gloss three-dimensional sheet characterized in that it is formed through a thermoforming process using a lens-shaped mold. 6. The method of claim 5, In the step of forming the low refractive thin film layer, The low refractive thin film layer is a method of manufacturing a high-gloss three-dimensional sheet having a protrusion, characterized in that formed through the deposition method. 8. The method of claim 7, The low refractive thin film layer is formed on the lens layer to the same thickness, the manufacturing method of the high-gloss three-dimensional sheet, characterized in that formed to have the same shape as the lenses of the lens layer. 6. The method of claim 5, The transparent resin is a manufacturing method of a high-gloss three-dimensional sheet, characterized in that the upper surface is formed flat. 6. The method of claim 5, In the step of printing the three-dimensional pattern, Printing the three-dimensional pattern with a predetermined rule to give the three-dimensional effect to the focal position of the lenses, And concealing and printing the concealed resin between the three-dimensional patterns after the three-dimensional pattern is printed. The method of claim 10, In the printing of the three-dimensional pattern, the three-dimensional pattern is formed by an off-set printing method, In the concealed printing step, The concealment printing method of manufacturing a high-gloss three-dimensional sheet, characterized in that using a silk-screen (silk-screen) method.

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