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WO2013018944A1 - Feuille en 3d comportant une résine d'injection pourvue de lentilles sur une partie supérieure et de motifs sur une partie inférieure, et procédé de fabrication de la feuille en 3d - Google Patents

Feuille en 3d comportant une résine d'injection pourvue de lentilles sur une partie supérieure et de motifs sur une partie inférieure, et procédé de fabrication de la feuille en 3d Download PDF

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Publication number
WO2013018944A1
WO2013018944A1 PCT/KR2011/005728 KR2011005728W WO2013018944A1 WO 2013018944 A1 WO2013018944 A1 WO 2013018944A1 KR 2011005728 W KR2011005728 W KR 2011005728W WO 2013018944 A1 WO2013018944 A1 WO 2013018944A1
Authority
WO
WIPO (PCT)
Prior art keywords
lenses
injection resin
patterns
thin film
dimensional sheet
Prior art date
Application number
PCT/KR2011/005728
Other languages
English (en)
Korean (ko)
Inventor
이창세
Original Assignee
주식회사 미성포리테크
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 미성포리테크 filed Critical 주식회사 미성포리테크
Priority to PCT/KR2011/005728 priority Critical patent/WO2013018944A1/fr
Publication of WO2013018944A1 publication Critical patent/WO2013018944A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
    • G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
    • 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
    • B41M3/06—Veined printings; Fluorescent printings; Stereoscopic images; Imitated patterns, e.g. tissues, textiles

Definitions

  • 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.
  • a two-dimensional image may be recognized as a three-dimensional (3D), that is, a three-dimensional image.
  • binocular parallax is a phenomenon in which the left and right eyes of a person are separated from each other by a predetermined distance so that even if the image of the same position is different from the light paths coming into the left and right eyes, a slight difference is formed in the left and right retinas.
  • Such a lenticular sheet generally has a structure in which transparent hemispherical lenses are formed in an upper surface and a fine pattern is formed in a lower surface, and has a very thin thickness, for example, a thickness of about 0.2 mm.
  • the thin lenticular sheet is attached to a thick exterior case formed of an injection resin, and the like, thereby causing a visual effect to the eyes of people.
  • the lens formed at the top should have a very small size. That is, in general, the thickness of the lenticular sheet is determined by the focal length of the lens. In the case of the lenticular sheet of about 0.2 mm, the size of the lens, that is, the diameter of the lens should be about 0.02 mm. It is very difficult to manufacture a mold for molding such a small size lens, and also the process of printing a pattern that fits such a small lens to the bottom surface is very difficult, and there are many problems in producing a realistically.
  • the problem to be solved by the present invention is to solve the problem of the conventional implementation of a very small size of the lens, and to provide a three-dimensional sheet and a three-dimensional sheet manufacturing method thereof that can be easily manufactured using an injection process.
  • the present invention is a transparent injection resin formed with a pattern on the lens and the bottom surface; A low refractive thin film layer formed on the lenses; And it provides a three-dimensional sheet comprising a back printing layer formed under the patterns.
  • the present invention may further comprise a protective hard coating layer formed on the low refractive index thin film layer, the lenses may have a focal length corresponding to the thickness of the injection resin.
  • the three-dimensional sheet may include a high gloss thin film layer on the upper surface of the back printing layer.
  • the present invention also provides a transparent injection resin formed with a pattern on the lens and the lower surface on the upper surface in order to solve the above problems; Forming a low refractive thin film layer on the lenses; And forming a bottom printing layer under the pattern layer.
  • the step of forming the back printing layer may further comprise the step of forming a protective hard coating layer through a spray process on the low refractive thin film layer, forming the back printing layer Before the step, it may comprise the step of forming a high gloss thin film layer on the lower surface of the injection resin.
  • FIG. 1 is a perspective view showing a three-dimensional sheet according to an embodiment of the present invention applied to a mobile phone exterior case.
  • FIG. 2 is an enlarged cross-sectional view of portion A of the three-dimensional sheet of FIG. 1.
  • 4A to 4F are flowcharts illustrating a method of manufacturing a three-dimensional sheet according to another embodiment of the present invention.
  • FIG. 1 is a perspective view showing a three-dimensional sheet according to an embodiment of the present invention applied to a mobile phone exterior case.
  • the three-dimensional sheet 100 of the present embodiment can solve the difficulty of manufacturing a conventional thin three-dimensional sheet, and also, in the production of a three-dimensional sheet, it is possible to directly produce a three-dimensional sheet of the desired form through the injection process. That is, the outer case itself can be implemented as a three-dimensional sheet through the injection process.
  • a large area lens is formed on the upper surface of the injection resin, and a pattern is formed on the lower surface of the injection resin having a thickness corresponding to the focal length of the lens, thereby making it difficult to form a lens having a very small size.
  • the three-dimensional sheet of the present embodiment may also use an insert in-mold injection, that is, an in-mold labeling (IML) process, which is a method of injecting a film to be coated onto the injection resin upper surface together. That is, the IML process is a process of adhering a film to be coated on the upper mold and simultaneously injection molding the adhesive film and the injection resin.
  • IML in-mold labeling
  • the film thickness generally used for an IML process is about 0.125 mm, there exists a problem in using the three-dimensional sheet corresponding to about 0.2 mm as an adhesive film in injection molding.
  • the thickness of the three-dimensional sheet is thinner, as mentioned above, it is difficult to apply the IML process to the three-dimensional sheet due to the difficulty in manufacturing the mold and the lower printing pattern due to the reduction of the lens size.
  • a separate thin film is formed on the upper surface of the injection resin. Can be formed through. For example, after the low refractive thin film layer or the protective hard coating layer is adhered to the upper mold and injected through an IML process, an injection resin in which the low refractive thin film layer or the protective hard coating layer is adhered to the top may be obtained.
  • FIG. 2 is an enlarged cross-sectional view of portion A of the three-dimensional sheet of FIG. 1.
  • the three-dimensional sheet 100 of the present embodiment includes an injection resin 150, a low refractive thin film layer 140, a high gloss thin film layer 172, a back printing layer 170, and a protective hard coating layer 160. do.
  • the injection resin 150 includes a plurality of legs 110 formed on an upper surface, a body portion 120 constituting a main body, and patterns 130 formed on a lower surface thereof.
  • the lenses 120 are formed to be convex upwards. These lenses 120 are formed as part of the injection resin 150. Therefore, it can be formed by a thermoforming process using a mold having the opposite curvature to the lens during the injection process.
  • the size of the lenses 120 is formed in a large area. Accordingly, the focal length of the lenses 120 has a distance of about the entire thickness of the injection resin 150.
  • the lenses 112 are formed in a very small size to form a thin three-dimensional sheet while forming a printing pattern layer directly under the lens. For example, in the case of the three-dimensional sheet of about 0.2 mm, the diameter of the lens was formed very small, about 0.02 mm.
  • large-area lenses having a focal length corresponding to the thickness of the injection resin for example, the thickness of the cellular phone case, are directly formed through the injection process on the top and bottom surfaces of the injection resin.
  • the three-dimensional sheet manufacturing process can be greatly simplified.
  • the lens is formed in a very large size, it is also easy to manufacture the upper mold for lens formation.
  • the diameter of the lens may be about 0.2 mm or more. It can be said to be easy.
  • the low refractive thin film layer 140 or the low refractive thin film layer 140 and the hard coating layer 160 together to produce a thin thickness, for example, 0.125mm or less
  • IML It can be used as an adhesive film of a process. Accordingly, the IML process may form an injection resin in which a low refractive thin film layer or a protective hard coating layer is adhered upward.
  • the lenses 120 are formed to have a convex structure to the upper side, in some cases, of course, they may be formed to have a convex structure to the lower side.
  • the body portion 120 constitutes a body of the injection resin 150. Since the body portion 120 is formed together with the lenses 110 and the patterns 130 through an injection process, the lenses 110, The body 120 and the patterns 130 are integrally formed of the same material.
  • the injection resin 150 should have a transparent characteristic. That is, since the light incident through the lenses 110 must pass through the body 120 to reach the lower patterns 130, the entire injection resin should be formed of a transparent material.
  • the injection resin 150 may also form amorphous resin.
  • the injection resin 150 may be formed using transparent ABS, GPPS, SAN (AS), PMMA, PC, or the like, which is an amorphous resin.
  • the main body of the injection resin 150 or the like since the main body of the injection resin 150 or the like is formed, there should be no deformation and robustness, and it is preferable that the wear resistance and the chemical resistance are excellent. On the other hand, it is preferable to select a material with good printability in order to form a print pattern layer below.
  • the focal length depends not only on the curvature of the lenses but also on the refractive index of the material constituting the lens. Therefore, when manufacturing the injection resin 150 of the present embodiment, the curvature of the formed lenses, the refractive index of the injection resin material, the thickness of the injection resin according to the focal length of the lens, and the position of the patterns formed on the bottom surface of the injection resin Due consideration should be given.
  • the patterns 130 are formed on the bottom surface of the injection resin 150, and are formed at the focal lengths of the plurality of lenses 110 formed on the top surface of the injection resin 150, and have a predetermined rule so that an appropriate three-dimensional shape can be seen. Is formed with. These patterns 130 may be formed in a thermoforming process by using a mold having a shape opposite to the pattern in the injection process, such as lenses.
  • the low refractive thin film layer 140 is formed on the upper surfaces of the lenses 110, and should be formed of a material that increases the refractive index of the lenses 110 while being transparent. That is, the difference between the refractive indices of the lenses 110 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 ⁇ 0.3, when the light is incident, the refractive index does not change so much that the focal length is not short enough. Therefore, the distance of vision that can feel a three-dimensional effect is also farther away. Because you can't.
  • the low refractive index of the low refractive thin film layer 140 means that it has a relatively low refractive index in relation to the lenses.
  • the low refractive thin film layer 140 may be bonded to the upper mold during injection molding, and thus may be coupled to the upper portion of the injection resin 150 through an IML process.
  • a protective hard coating layer 160 is formed on the low refractive thin film layer 140 to protect the three-dimensional sheet.
  • the hard coating layer 160 may be formed through spraying, or may be formed by adhering a separate protective film. However, the hard coating layer 160 is not limited to such a method and may be formed in various ways.
  • the hard coating layer 160 preferably has a high surface hardness for performing the function of the three-dimensional sheet protection. Meanwhile, as described above, the hard coating layer 160 may also be combined with the low refractive thin film layer 140 on the injection resin 150 through the IML process.
  • the back printing layer 170 may fill the patterns 130 and have a structure constituting the bottom of the three-dimensional sheet.
  • the back printed layer 170 functions to give a predetermined color to distinguish the patterns 130 from each other. That is, since the patterns 130 formed on the injection resin are transparent as described above, the patterns 130 may be colored by forming the rear printed layer 17 having the color below.
  • the back printing layer may be formed by offset printing or silk-screen printing. Of course, it is not limited to such a method and can be formed in other methods.
  • the high gloss thin film layer 172 may be formed between the back printing layer 170 and the patterns 130.
  • the high gloss thin film layer 172 may solve the problem that the incident light is absorbed by the back printing layer 170 so that the images of the patterns 130 of the injection resin 150 are blurred or distorted. Therefore, the high gloss thin film layer 172 may be formed of a material capable of reflecting incident light.
  • the principle of making a 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.
  • the focal position of the lenses and the corresponding positions of the patterns should be accurately determined.
  • 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.
  • a plurality of hemispherical lenses 110 are formed on the top surface of the injection resin 150, and periodically constant patterns are formed on the bottom surface of the injection resin 150 having a focal length of the lenses 110. If 130 is formed, and the periodic interval of the pattern and the spacing of the hemispherical lenses are properly matched, the left eye and the right eye recognize different patterns, and accordingly, the brain properly recognizes the image recognized from the left eye and the right eye. In combination, it is recognized as a stereoscopic image.
  • 3A and 3B are sectional views showing the structure of the injection resin used in the three-dimensional sheet of the present embodiment.
  • a plurality of hemispherical lenses 110 are formed on an upper surface of the injection resin 150, and a plurality of patterns 130 having a structure similar to the lens is formed below. It can be seen that this is formed.
  • the patterns 130 have a structure similar to that of the lenses 110, the formation positions of the patterns also correspond to the upper lenses, respectively.
  • the injection resin 150a in FIG. 3B similar to FIG. 3A, but patterns 130a formed on a lower surface thereof are different from those in FIG. 3A. That is, the patterns 130a in FIG. 3B have a protruding structure such as a square pillar rather than a hemispherical shape.
  • the patterns formed on the injection resin of the present embodiment are not limited to hemispheres and may have various structures or sizes.
  • the structure and the size may be formed in various ways, but the patterns should be accurately formed at each focal position of the upper lenses.
  • 4A to 4F are flowcharts illustrating a method of manufacturing a three-dimensional sheet according to another embodiment of the present invention.
  • a lower mold 510 and an upper mold 520 are prepared.
  • Lower convex patterns are formed on the upper surface of the lower mold 510 to form patterns on the lower surface of the injection resin
  • lower convex patterns are formed on the lower surface of the upper mold 520 to form the lenses on the upper surface of the injection resin. have.
  • the lower surface of the lower mold 510 and the lower surface of the upper mold 520 are both shown in a horizontal structure in the drawing, this is represented by considering only the three-dimensional sheet portion of FIG. 2, and the three-dimensional sheet is actually applied to a real object such as a mobile phone exterior case. In the case where it is applied, the lower mold 510 and the upper mold 520 has a proper structure in accordance with the appearance of the object to be formed, of course.
  • a liquid resin is injected between the lower mold 510 and the upper mold 520 to perform an injection process through thermoforming.
  • the injection resin that is, the intermediate three-dimensional sheet, on which the lenses 110 and the patterns 130 are formed, is formed on the top and bottom surfaces of the injection resin.
  • the injection resin 150 forms the main body of the three-dimensional sheet, it may be formed to a predetermined thickness, for example, about 1 mm.
  • it should be formed of a transparent material that can transmit light as described above.
  • the IML process which is a method of combining the low refractive thin film layer or the hard coating layer to the injection resin and proceeds with the injection
  • the process of adhering the low refractive thin film layer or the hard coating layer to the upper mold 520 must be preceded before performing the IML process.
  • FIG. 4C shows the molded injection resin 150 after removing the lower mold 510 and the upper mold 520, the structure of which is similar to that of FIG. 3A. Meanwhile, as described above, the structure or size of the patterns formed on the lower surface of the injection resin 150 may be changed by changing the structures of the patterns formed on the upper surface of the lower mold 510.
  • the low refractive thin film layer 140 is formed on the lenses 110 formed in the injection resin.
  • the low refractive thin film layer 140 should be formed of a material which is transparent and increases the refractive index change of the lower lenses 110.
  • the hard coating layer 160 is formed on the low refractive thin film layer 140. Since the hard coating layer 160 is formed to protect the three-dimensional sheet, it is preferable to form a material having a high surface hardness.
  • the hard coating layer 160 may be formed through spraying, or may be formed by adhering a separate protective film. However, the hard coating layer 160 is not limited to such a method and may be formed in various ways.
  • the process of forming the low refractive thin film layer 140 or the hard coating layer 160 of FIG. 4D or 4E may be omitted.
  • the process of forming the low refractive thin film layer 140 or the hard coating layer 160 of FIG. 4D or 4E may be omitted.
  • the back printing layer 170 is formed on the bottom surface of the injection resin 150.
  • the back printing layer 170 may fill the patterns 130 and have a structure constituting the bottom of the three-dimensional sheet.
  • the back printing layer may be formed by offset printing or silk-screen printing. Of course, it is not limited to such a method and can be formed in other methods.
  • the high gloss thin film layer 172 may be further formed on the bottom surface of the injection resin pattern.
  • the high gloss thin film layer 172 may be formed to solve the problem that the incident light is absorbed by the back printing layer 170 so that the image of the patterns 130 of the injection resin 150 is blurred or distorted.
  • the present invention relates to a three-dimensional sheet capable of realizing a 3D image, and more particularly, to a three-dimensional sheet using a thick injection resin with a lens formed on an upper surface and a pattern formed on a lower surface thereof, and a method of manufacturing the three-dimensional sheet.
  • a three-dimensional sheet including an injection resin having a pattern formed on the upper surface of the lens and a lower portion thereof, and a method of manufacturing the three-dimensional sheet thereof form a large area of lenses on the upper surface of the injection resin through an injection process, and a pattern corresponding to the lenses on the lower surface thereof. By forming them, it is possible to solve the problem of conventional lens implementation of a very small size.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention porte sur une feuille en 3D et sur un procédé de fabrication de celle-ci, ledit procédé résolvant le problème existant de fabrication d'une très petite lentille, celle-ci pouvant être facilement fabriquée à l'aide d'un procédé d'injection. La feuille en 3D comporte : une résine d'injection transparente sur une surface supérieure de laquelle sont formées des lentilles et sur une surface inférieure de laquelle sont formés des motifs ; une couche de film mince à basse réflexion qui est formée au-dessus des lentilles ; une couche imprimée arrière qui est formée au-dessous des motifs. Le procédé de fabrication comprend également les étapes consistant : à former la résine d'injection transparente, sur la surface supérieure de laquelle sont formées les lentilles et sur la surface inférieure de laquelle sont formés les motifs, au moyen d'un procédé d'injection ; à former la couche de film mince à basse réflexion au-dessus des lentilles ; à former la couche imprimée arrière au-dessous d'une couche de motif.
PCT/KR2011/005728 2011-08-04 2011-08-04 Feuille en 3d comportant une résine d'injection pourvue de lentilles sur une partie supérieure et de motifs sur une partie inférieure, et procédé de fabrication de la feuille en 3d WO2013018944A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/005728 WO2013018944A1 (fr) 2011-08-04 2011-08-04 Feuille en 3d comportant une résine d'injection pourvue de lentilles sur une partie supérieure et de motifs sur une partie inférieure, et procédé de fabrication de la feuille en 3d

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/005728 WO2013018944A1 (fr) 2011-08-04 2011-08-04 Feuille en 3d comportant une résine d'injection pourvue de lentilles sur une partie supérieure et de motifs sur une partie inférieure, et procédé de fabrication de la feuille en 3d

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WO2013018944A1 true WO2013018944A1 (fr) 2013-02-07

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1184108A (ja) * 1997-09-11 1999-03-26 Mitsubishi Rayon Co Ltd レンチキュラーレンズシート及びその製造法
KR20110053009A (ko) * 2009-11-13 2011-05-19 주식회사 미성포리테크 하이-그로시 입체 시트 및 그 입체 시트 제조방법
KR20110094973A (ko) * 2010-02-18 2011-08-24 주식회사 미성포리테크 상부에 렌즈와 하부로 패턴이 형성된 사출레진을 포함한 입체시트 및 그 입체시트 제조방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1184108A (ja) * 1997-09-11 1999-03-26 Mitsubishi Rayon Co Ltd レンチキュラーレンズシート及びその製造法
KR20110053009A (ko) * 2009-11-13 2011-05-19 주식회사 미성포리테크 하이-그로시 입체 시트 및 그 입체 시트 제조방법
KR20110094973A (ko) * 2010-02-18 2011-08-24 주식회사 미성포리테크 상부에 렌즈와 하부로 패턴이 형성된 사출레진을 포함한 입체시트 및 그 입체시트 제조방법

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