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WO2013018945A1 - Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication - Google Patents

Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication Download PDF

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Publication number
WO2013018945A1
WO2013018945A1 PCT/KR2011/005729 KR2011005729W WO2013018945A1 WO 2013018945 A1 WO2013018945 A1 WO 2013018945A1 KR 2011005729 W KR2011005729 W KR 2011005729W WO 2013018945 A1 WO2013018945 A1 WO 2013018945A1
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WO
WIPO (PCT)
Prior art keywords
layer
dimensional sheet
lens
injection resin
lenses
Prior art date
Application number
PCT/KR2011/005729
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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/KR2011/005729 priority Critical patent/WO2013018945A1/fr
Publication of WO2013018945A1 publication Critical patent/WO2013018945A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0012—Arrays characterised by the manufacturing method
    • G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • 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

Definitions

  • the present invention relates to a three-dimensional sheet capable of realizing a 3D image, and more particularly, to a three-dimensional sheet in which a printing pattern layer is formed under a thick injection resin, and a method of manufacturing the three-dimensional sheet.
  • 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 method for manufacturing the three-dimensional sheet that can be easily manufactured using the insert in-mold injection process .
  • the present invention is a lens layer formed of a plurality of large area lenses having a diameter larger than the center thickness;
  • a transparent injection resin formed under the lens layer and having a thickness corresponding to a focal length of the lenses; It provides a three-dimensional sheet comprising a three-dimensional sheet comprising a; and a printed pattern layer formed under the injection resin.
  • the lens layer may include a low refractive thin film layer formed in the convex direction of the lenses.
  • the three-dimensional sheet may further include a protective film layer formed on the lens layer, and an adhesive layer formed between the lens layer and the injection resin.
  • the present invention also comprises the steps of: bonding a lens layer formed with a plurality of large area lenses having a diameter larger than the center thickness in the upper mold; Forming an intermediate three-dimensional sheet having a transparent injection resin bonded to the lower part of the lens layer through an insert in-mold injection process; And forming a printed pattern layer on the lower surface of the injection resin to complete a three-dimensional sheet.
  • the method before forming the intermediate three-dimensional sheet, in order to bond the lens layer to the injection resin, it may include the step of forming an adhesive layer under the lens layer. Before adhering the lens layer, the method may include forming the lens layer including lenses having a diameter of 0.2 mm or more.
  • the method may further include forming a protective film layer on the lens layer.
  • a predetermined pattern formed on the lower mold is transferred to invert the pattern to the lower surface of the injection resin.
  • a pattern is formed, and in the step of completing the three-dimensional sheet, the pattern layer may be formed by back printing on the reverse pattern.
  • the three-dimensional sheet including the printing pattern layer formed on the lower portion of the injection resin and the method of manufacturing the three-dimensional sheet according to the present invention has a large size of the lens, and accordingly, by using a structure to form a printing pattern layer on the lower portion of the thick injection resin, It solves the difficulty of producing a thin three-dimensional sheet, and can also easily implement the external case of the desired shape through the IML process.
  • 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.
  • 3a to 3e is a flow chart showing a manufacturing method of a three-dimensional sheet according to another embodiment of the present invention.
  • 4A to 4D 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.
  • Figure 1 shows a three-dimensional sheet 100 according to an embodiment of the present invention is applied to a mobile phone exterior case, the three-dimensional sheet 100 according to the present embodiment is not attached to the external case surface unlike the conventional exterior case It will construct itself. That is, in the prior art, a three-dimensional sheet was manufactured separately and used in a manner of adhering to an outer case formed of a thick injection resin. The entire exterior case itself, including the three-dimensional sheet to function.
  • 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, the desired shape through the insert in-mold injection, that is, IML (In-Mold Labeling) process
  • IML In-Mold Labeling
  • the three-dimensional sheet can be produced immediately.
  • the outer case itself can be implemented as a three-dimensional sheet through the IML process.
  • the IML process is a process of adhering a film to be coated on the upper mold and simultaneously molding the adhesive film and the injection resin.
  • the film thickness generally used for an IML process is about 0.125 mm
  • 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.
  • the present embodiment by using a large-area lens layer as an adhesive film layer and introducing the concept of forming a printed pattern layer under the injection resin, it solves the difficulty of manufacturing a thin three-dimensional sheet, and also, only a large-area lens layer.
  • the IML process can be easily performed.
  • the three-dimensional sheet structure of the present embodiment will be described in more detail.
  • 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 a lens layer 110, an injection resin 120, a printing pattern layer 130, an adhesive layer 140, and a protective film layer 150.
  • the lens layer 110 includes a plurality of lenses 112 at the upper side and a low refractive thin film layer 114 at the bottom.
  • the lenses 112 are formed convexly downward, and the lenses 112 are formed of a transparent resin, for example, polycarbonate (PC), and are formed by a thermoforming process using a mold having opposite curvature with the lens. Can be.
  • a transparent resin for example, polycarbonate (PC)
  • PC polycarbonate
  • the lenses 112 are not limited to a PC, and as long as they are transparent, a transparent thermoplastic resin having a refractive index of about 1.45 to 1.58, such as polymethyl methacrylate, polyester, polyvinyl chloride, polystyrene, urethane acrylate, epoxy acryl, etc. It may be formed through a curable resin having a refractive index of about 1.45 to 1.60, such as a rate and an ester acrylate, or various resins such as polyethylene terephtalate (PET) and acrylonitrile butadiene styrene copolymer (ABS).
  • PET polyethylene terephtalate
  • ABS acrylonitrile butadiene styrene copolymer
  • an appropriate material should be selected in consideration of the refractive index of the lens, the thickness of the lens, and the thickness of the entire three-dimensional sheet.
  • the size of the lenses 112 is formed in a large area. Accordingly, the focal length of the lenses 112 is greater than or equal to the thickness of the injection resin 120 formed below.
  • 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.
  • the lens layer 110 can be used as an adhesive film of an IML process.
  • the lens layer 110 including the low refractive thin film layer 114 can be manufactured to about 0.125 mm or less.
  • the lens itself can be formed very easily by forming the diameter of the lens to about 0.2 mm or more. That is, manufacture of the metal mold
  • the lenses 112 are formed in a convex downward structure, but in some cases, the lenses 112 may be formed in a convex upward structure.
  • the low refractive thin film layer 114 should be formed of a material that is transparent and increases the refractive index change of the upper lenses 112. That is, the difference between the refractive index of the lenses 112 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 in the low refractive thin film layer 114 means that it has a relatively low refractive index in relation to the lenses.
  • a low refractive thin film layer is formed on top of the lenses. That is, the low refractive thin film layer is formed with convex surfaces of the lenses.
  • Injection resin 120 is a resin that can be used in the IML process, it is preferable to form an amorphous resin because the injection resin 120 in this embodiment should have a transparent characteristic. This is because the printing pattern layer 130 is formed under the injection resin, so that light may be transmitted to the printing pattern layer 130 to realize three-dimensional characteristics.
  • the injection resin 120 may be formed using transparent ABS, GPPS, SAN (AS), PMMA, PC, and the like, which are amorphous resins.
  • the main body of the injection resin 120 or the like since the main body of the injection resin 120 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 print pattern layer 130 may be formed under the injection resin 120, and may include a pattern 132 and a concealed resin 134.
  • the pattern 132 is formed at the focal length of the plurality of lenses 112 formed above the injection resin 120 and is formed with a predetermined rule so that an appropriate three-dimensional shape can be seen.
  • the pattern 132 may generally be formed through an offset-printing method. That is, a pattern is designed according to the shape to be implemented and the focal position of the lenses 112, and a plate for printing, that is, a plate is made based on the pattern, and a pattern is formed on the bottom surface of the injection resin 120 through the plate. Will print.
  • the pattern 132 may also be formed by etching. Although the offset printing and etching methods are illustrated for the method of forming the pattern 132, a pattern may be formed through other methods without being limited thereto.
  • the concealed resin 134 may be formed to have a structure filling the patterns 132 or covering the entire patterns 132. This concealment resin 134 functions to distinguish the patterns 132 from each other.
  • the concealed resin 134 may be formed in a silk-screen manner, and the concealed resin 134 fills in between the patterns 132 already formed. This concealment resin 134 is also not limited to the silkscreen method can be formed in other ways, of course.
  • the print pattern layer 130a only needs to perform the back printing with the concealed resin 134, without the need to form separate patterns again do.
  • the pattern formed on the injection resin 120a is transparent, a high-gloss thin film layer may be further formed before the back printing is performed to prevent blur or distortion of the image.
  • 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 112 are formed with the lens layer 110, and a regular pattern 132 is periodically formed below the injection resin 120 at the focal length of the lenses 112.
  • the left eye and the right eye recognize different patterns, and accordingly, the brain properly combines the images recognized from the left eye and the right eye. It is recognized as a three-dimensional image.
  • the adhesive layer 140 is formed between the lens layer 110 and the injection resin 120.
  • the adhesive layer 140 is to more firmly adhere the lens layer 110 to the injection resin 120 in the IML process. Used. Therefore, if the lens layer 110 can be firmly adhered to the injection resin 120 through the adhesive force of the lens layer 110 itself or the injection resin itself, the adhesive layer 140 may be omitted.
  • the lens layer 110 and the adhesive layer 140 together function as an adhesive film in the IML process, and thus, the overall thickness of the lens layer 110 and the adhesive layer 140. May be formed to about 0.125mm.
  • the protective film layer 150 is formed on the lens layer 110 to protect the three-dimensional sheet, it is preferably formed of a material having a high surface hardness for the three-dimensional sheet protection function.
  • the protective film layer 150 may be formed through hard coating on the lens layer 110 after the IML process, before or after the printing pattern layer 130 is formed.
  • the present invention is not limited thereto, and a method of forming the protective film layer 150 on the lens layer 110 first and using the protective film layer 150 up to the protective film layer 150 may also be considered.
  • the three-dimensional sheet according to the present embodiment by forming the lenses of the lens layer in a large area, it is possible to eliminate the difficulty in forming the lens of the existing fine size.
  • the printing pattern layer can be formed under the injection resin based on the large area lens, the lens layer can be formed thin, and such a thin lens layer can be used as the adhesive film of the IML process. Therefore, the three-dimensional sheet of the present embodiment can be formed by applying the IML process, and since the injection resin itself constitutes the body portion of the three-dimensional sheet, the three-dimensional sheet can be used directly as the exterior case itself.
  • 3a to 3e is a flow chart showing a manufacturing method of a three-dimensional sheet according to another embodiment of the present invention.
  • a lower mold 510 and an upper mold 520 are prepared. Although the lower surface of the lower mold 510 and the lower surface of the upper mold 520 are shown flat in the drawing, this is represented by considering only the three-dimensional sheet part 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 the lower mold 510 and the upper mold 520 has an appropriate shape of the inside according to the appearance of the object to be formed, of course.
  • the lens layer 110 and the adhesive layer 140 are adhered to the lower surface of the upper mold 520.
  • the lens layer 110 includes the lenses 112 and the low refractive thin film layer 114. As described above, if the film layer 110 can be firmly adhered to the injection resin 120, the adhesive layer 140 may be omitted. In addition, when the protective film layer 150 is also applied to the IML process, the protective film layer 150 may be further formed on the lens layer 110.
  • a liquid resin is injected between the lower mold 510 and the upper mold 520 to perform an IML process through thermoforming.
  • an intermediate stage three-dimensional sheet is formed by bonding the lens layer 110 and the adhesive layer 140 onto the injection resin 120.
  • the injection resin 120 since the injection resin 120 forms a main body of the three-dimensional sheet, it may be formed to a predetermined thickness, for example, about 1 mm. In addition, it should be formed of a transparent material that can transmit light as described above.
  • the protective film layer 150 is formed on the lens layer 110. If the protective film layer 150 is already formed through the IML process, this step may be omitted. On the other hand, the protective film layer 150 may be formed after the formation process of the lower printed pattern layer 130, of course.
  • the print pattern layer 130 is formed under the injection resin 120.
  • the print pattern layer 130 may include a pattern and a printing resin, and may be formed through offset printing or silk screen printing.
  • 4A to 4D are flowcharts illustrating a method of manufacturing a three-dimensional sheet according to another embodiment of the present invention.
  • a lower mold 510a and an upper mold 520 are prepared. Unlike FIG. 3A, predetermined patterns 512 are formed on an upper surface of the lower mold 510.
  • the lens layer 110 and the adhesive layer 140 are attached to the upper mold 520, and resin is injected to perform an IML process.
  • an intermediate stage stereoscopic sheet formed by bonding the lens layer 110 and the adhesive layer 140 onto the injection resin 120a is formed.
  • the patterns 512 formed on the upper surface of the lower mold 510a are transferred so that the predetermined pattern 122 protrudes from the lower surface of the injection resin 120a.
  • the transparent patterns 122 formed on the lower surface of the injection resin 120a function as patterns for stereoscopic images.
  • such patterns 122 should be formed with a predetermined rule in the focal position of the upper lenses 112.
  • the protective film layer 150 is formed on the upper surface of the lens layer 110 as in FIG. 3D.
  • this step may be omitted.
  • back printing is performed under the injection resin 120a to form a print pattern layer 130a. That is, unlike FIG. 3E, only the concealed resin may be formed through offset printing or silk-sketch printing without forming patterns separately. On the other hand, when performing the back printing, the light may be absorbed by the concealed resin, so that the image of the patterns on the injection resin 120 may be blurred or distorted.
  • the glossy thin film layer may be further formed as the lower surface of the injection resin.
  • the present invention relates to a three-dimensional sheet capable of realizing a 3D image, and more particularly, to a three-dimensional sheet in which a printing pattern layer is formed under a thick injection resin, and a method of manufacturing the three-dimensional sheet.
  • the three-dimensional sheet including the printing pattern layer formed on the lower portion of the injection resin and the method of manufacturing the three-dimensional sheet according to the present invention has a large size of the lens, and accordingly, by using a structure to form a printing pattern layer on the lower portion of the thick injection resin, It solves the difficulty of producing a thin three-dimensional sheet, and can also easily implement the external case of the desired shape through the IML process.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (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 à insert dans le moule. La feuille en 3D comporte : une couche de lentilles dans laquelle est formée une pluralité de lentilles de grande surface ayant un diamètre supérieur à une épaisseur de centre ; une résine d'injection transparente, qui est formée au-dessous de la couche de lentilles et dont l'épaisseur correspond à une distance focale des lentilles ; une couche de motif imprimé qui est formée au-dessous de la résine d'injection. Le procédé de fabrication comprend également les étapes consistant : à coupler la couche de lentilles, dans laquelle est formée la pluralité de lentilles de grande surface ayant un diamètre supérieur à l'épaisseur de centre, à un moule supérieur ; à former une couche en 3D intermédiaire dans laquelle la résine d'injection transparente est couplée au-dessous de la couche de lentilles au moyen d'un procédé d'injection à insert dans le moule ; à terminer la feuille en 3D en formant la couche de motif imprimé sur une surface inférieure de la résine d'injection.
PCT/KR2011/005729 2011-08-04 2011-08-04 Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication WO2013018945A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/005729 WO2013018945A1 (fr) 2011-08-04 2011-08-04 Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2011/005729 WO2013018945A1 (fr) 2011-08-04 2011-08-04 Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication

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WO2013018945A1 true WO2013018945A1 (fr) 2013-02-07

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PCT/KR2011/005729 WO2013018945A1 (fr) 2011-08-04 2011-08-04 Feuille en 3d comportant une couche de motif imprimé disposée au-dessous d'une résine d'injection et son procédé de fabrication

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015016999A1 (fr) * 2013-07-30 2015-02-05 Ideal Jacobs Corporation Protection pour une surface de construction d'imprimante 3d

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007001214A (ja) * 2005-06-24 2007-01-11 Seiko Epson Corp レンズ基板の製造方法、レンズ基板、透過型スクリーンおよびリア型プロジェクタ
KR20090029818A (ko) * 2006-06-28 2009-03-23 비쥬얼 피직스 엘엘씨 마이크로-광학 보안 및 화상 표시 시스템
KR20110094974A (ko) * 2010-02-18 2011-08-24 주식회사 미성포리테크 사출레진 하부에 형성된 인쇄 패턴층을 포함한 입체시트 및 그 입체시트 제조방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007001214A (ja) * 2005-06-24 2007-01-11 Seiko Epson Corp レンズ基板の製造方法、レンズ基板、透過型スクリーンおよびリア型プロジェクタ
KR20090029818A (ko) * 2006-06-28 2009-03-23 비쥬얼 피직스 엘엘씨 마이크로-광학 보안 및 화상 표시 시스템
KR20110094974A (ko) * 2010-02-18 2011-08-24 주식회사 미성포리테크 사출레진 하부에 형성된 인쇄 패턴층을 포함한 입체시트 및 그 입체시트 제조방법

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015016999A1 (fr) * 2013-07-30 2015-02-05 Ideal Jacobs Corporation Protection pour une surface de construction d'imprimante 3d
CN105934341A (zh) * 2013-07-30 2016-09-07 理想雅各布斯公司 用于三维打印机构建表面的覆盖件
US9993995B2 (en) 2013-07-30 2018-06-12 Ideal Jacobs Corporation Cover for a three-dimensional printer build surface
US10160183B2 (en) * 2013-07-30 2018-12-25 Ideal Jacobs Corporation Cover for a three-dimensional printer build surface
US10632720B2 (en) 2013-07-30 2020-04-28 Ideal Jacobs Corporation Cover for a three-dimensional printer build surface

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