WO2021218100A1 - Film photochromique dynamique à micromiroirs - Google Patents

Film photochromique dynamique à micromiroirs Download PDF

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Publication number
WO2021218100A1
WO2021218100A1 PCT/CN2020/126841 CN2020126841W WO2021218100A1 WO 2021218100 A1 WO2021218100 A1 WO 2021218100A1 CN 2020126841 W CN2020126841 W CN 2020126841W WO 2021218100 A1 WO2021218100 A1 WO 2021218100A1
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WO
WIPO (PCT)
Prior art keywords
layer
micro
dielectric layer
color
graphic
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PCT/CN2020/126841
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English (en)
Chinese (zh)
Inventor
朱昊枢
叶瑞
孙营春
左志成
任家安
陈林森
朱志坚
Original Assignee
苏州苏大维格科技集团股份有限公司
苏大维格(盐城)光电科技有限公司
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Publication of WO2021218100A1 publication Critical patent/WO2021218100A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions

Definitions

  • the utility model relates to the technical field of anti-counterfeiting, in particular to a dynamic optical variable film of a micromirror.
  • the existing dynamic security films are based on both sides of the substrate, with a micro lens layer on one side and a micro graphic layer on the other side.
  • the product presents a dynamic graphic effect, and the color is a fixed color, without discoloration effect, and low anti-counterfeiting force.
  • the purpose of the utility model is to provide a micro-mirror dynamic light-changing film with a color-changing effect.
  • the utility model provides a micro-mirror dynamic light variable film, which in turn includes a micro-lens array layer, a base film, an information layer with micro graphics, an upper medium layer, an intermediate medium layer, and a lower medium layer.
  • a micro-mirror dynamic light variable film which in turn includes a micro-lens array layer, a base film, an information layer with micro graphics, an upper medium layer, an intermediate medium layer, and a lower medium layer.
  • the refractive index of the upper dielectric layer and the lower dielectric layer are both greater than the refractive index of the intermediate dielectric layer.
  • the information layer is provided with at least one micro-image and text layer with micro-image and text information.
  • the micro-image and text layer has multiple layers, the micro-image and text of each layer are the same as those of the other layers. Correspondence staggered.
  • the micro-graphic layer is provided with a micro-graphic groove, and the micro-graphic groove forms the micro-graphic information, or the micro-graphic groove is filled with ink , The ink follows the shape of the micro-graphic groove to form the micro-graphic information.
  • the microlens array layer is provided with a plurality of microlenses of the same size, and the information layer is arranged near the focal plane of the microlenses.
  • the thickness of the upper dielectric layer is smaller than that of the middle dielectric layer, and the thickness of the lower dielectric layer is smaller than that of the middle dielectric layer.
  • the micromirror dynamic optical variable film further includes a color layer, the color layer is disposed on the side of the lower dielectric layer away from the intermediate dielectric layer, and the color layer is provided with at least one color area.
  • the micro-lens dynamic optical variable film further includes a dielectric protective layer, a transparent protective layer, a pressure-sensitive adhesive layer, and a release paper layer
  • the dielectric protective layer is disposed on the micro lens array layer away from the
  • the transparent protective layer is disposed on the side of the medium protective layer away from the microlens array layer
  • the pressure-sensitive adhesive layer is disposed on a side of the color layer away from the lower dielectric layer.
  • the release paper layer is arranged on the side of the pressure-sensitive adhesive layer away from the color layer.
  • the micromirror dynamic light-changing film provided by the utility model forms a color-changing structure that changes color with the change of the observation angle through the upper dielectric layer, the middle dielectric layer, and the lower dielectric layer, so that the micromirror dynamic light When the variable film rotates, it has the dual anti-counterfeiting effect of the dynamic zooming change of the micro-graphics and the color change, and the anti-counterfeiting force is extremely high.
  • Fig. 1 is a schematic diagram of the structure of the micro-mirror dynamic light-changing film according to the first embodiment of the present invention
  • FIG. 2 is a schematic diagram of the structure of the micro-mirror dynamic light change film according to the second embodiment of the present invention.
  • Fig. 3 is a schematic diagram of the structure of the micro-mirror dynamic light-changing film according to the third embodiment of the present invention.
  • the micro-mirror dynamic optical variable film provided in the first embodiment of the present invention includes a micro-lens array layer 12, a base film 11, an information layer 13, an upper dielectric layer 14, an intermediate dielectric layer 15, and a lower dielectric layer in sequence.
  • Layer 16 The information layer 13 is in contact with the upper dielectric layer 14, and the upper dielectric layer 14, the middle dielectric layer 15 and the lower dielectric layer 16 form a color-changing structure that changes color with the change of the viewing angle.
  • the microlens array layer 12 is provided with a plurality of microlenses of uniform size in a lattice arrangement or randomly arranged, and a base film 11 is provided on the lower surface of the microlens array layer 12.
  • the transparency of the base film 11 is relatively high to ensure that the information layer 13 provided on the lower surface of the base film 11 can be clearly seen through the base film 11.
  • the base film 11 is PET (Polyethylene terephthalate, polyethylene terephthalate), and an information layer 13 is provided on the lower surface of the base film 11.
  • the information layer 13 is provided with a micro-graphic information layer with micro-graphic information.
  • the micro-graphic layer is provided with a micro-graphic groove 50, and the micro-graphic groove 50 forms micro-graphic information.
  • the micro graphic information in the micro graphic layer is set near the focal plane of the micro lens, and the moiré magnification effect is formed by the micro lens, so that the micro graphic information observed through the micro lens array layer 12 is three-dimensional and dynamic. Enlarge to increase the anti-counterfeiting effect.
  • a color-changing structure is provided on the lower surface of the information layer 13, and the color-changing structure is a multilayer thin film resonance structure.
  • the structure is based on the principle of resonance to realize the expression of colors: standing wave resonance occurs when the incident wavelength changes at different observation angles to realize the color change, that is, the color changes as the observation angle changes.
  • the discoloration structure is specifically explained as follows.
  • the upper dielectric layer 14 and the lower dielectric layer 16 are prepared by a vacuum evaporation process or a vacuum sputtering process, and the intermediate dielectric layer 15 is prepared by a vacuum evaporation process or a vacuum sputtering process or a nano-coating method.
  • the upper dielectric layer 14 is prepared on the surface of the information layer 13 on the side with the micro-graphic information
  • the intermediate dielectric layer 15 is prepared on the lower surface of the upper dielectric layer 14
  • the lower dielectric layer 16 is prepared on the lower surface of the intermediate dielectric layer 15.
  • the material of the upper dielectric layer 14 is a high refractive index medium, such as titanium dioxide and zinc sulfide, with a thickness of 10-80 nm; the material of the upper dielectric layer 14 may also be metal, with a thickness of 6-10 nm.
  • the material of the intermediate dielectric layer 15 is a metal compound, such as magnesium fluoride, or metal or polymer, with a thickness of 150nm-2um;
  • the material of the lower dielectric layer 16 is a high refractive index medium, such as titanium dioxide, zinc sulfide, and its thickness It is 10-80 nm; the material of the lower dielectric layer 16 can also be metal, and its thickness is 10-50 nm.
  • the color expression is achieved by designing the upper dielectric layer 14, the middle dielectric layer 15 and the lower dielectric layer 16 with the materials of each layer or/and different thicknesses. As the thickness changes, the displayed color changes, and with the observation angle (incident The angle) changes, the color presented will also change.
  • the material of the upper dielectric layer 14 is metallic chromium, which is prepared by a vacuum evaporation process, and its thickness is 8nm; the surfaces on both sides of the upper dielectric layer 14 follow the shape of the information layer 13 in contact with the upper dielectric layer 14. The surface with the micro graphic information side.
  • the intermediate dielectric layer 15 is PMMA (Polymethyl methacrylat), which is prepared by nano-coating, and its thickness is 1 um; the upper surface of the intermediate dielectric layer 15 follows the shape of the information layer in contact with the upper dielectric layer 14 13 The surface on the side with the micro-graphic information, and the lower surface is flat.
  • the material of the lower dielectric layer 16 is metallic aluminum, and the thickness is 30 nm. Among them, the upper dielectric layer 14, the middle dielectric layer 15 and the lower dielectric layer 16 form a slab waveguide resonance structure with a color changing function, and the structure is specifically a Fabry-Perot cavity.
  • the refractive index of the upper dielectric layer 14 and the refractive index of the lower dielectric layer 16 are both greater than the refractive index of the intermediate dielectric layer 15.
  • the refractive index of the intermediate dielectric layer 15 is 1.38-1.51.
  • the product of this embodiment has the dual anti-counterfeiting effects of dynamic zooming change of micro-graphics and color change when rotating, and the anti-counterfeiting force is extremely high.
  • the micro-mirror dynamic optical variable film provided by the second embodiment of the present invention sequentially includes a micro-lens array layer 22, a base film 21, an information layer 23, an upper dielectric layer 24, an intermediate dielectric layer 25, and a lower dielectric layer. 26.
  • the information layer 23 is in contact with the upper dielectric layer 24, and the upper dielectric layer 24, the middle dielectric layer 25, and the lower dielectric layer 26 form a resonance structure that changes color with the change of the viewing angle.
  • the difference between the micro-mirror dynamic light-changing film of this embodiment and the above-mentioned first embodiment is that the micro-mirror dynamic light-changing film further includes a color layer 27.
  • the color layer 27 is arranged on the side of the lower dielectric layer 26 away from the intermediate dielectric layer 25.
  • the color of the color layer 27 is dark, such as black, deep purple, and deep blue; the thickness of the color layer 27 is 0.1 um to 20 um; preferably, the thickness of the color layer 27 is 1 um to 10 um.
  • the material of the color layer 27 is nano-scale ink, and the color of the color layer 27 is black.
  • each dielectric layer is prepared by a vacuum evaporation process. Therefore, the upper surface and the lower surface of each dielectric layer conform to the surface of the information layer 13 which is in contact with the upper dielectric layer 14 and has the micro-graphic information side.
  • the material of the upper dielectric layer 24 is zinc sulfide, the refractive index is 2.4, and the thickness is 10 nm; the material of the intermediate dielectric layer 25 is magnesium fluoride, the refractive index is 1.38, and the thickness is 200 nm.
  • the material of the lower dielectric layer 26 is titanium dioxide with a thickness of 30 nm.
  • the upper dielectric layer 24, the middle dielectric layer 25, and the lower dielectric layer 26 form a slab waveguide resonance structure. Together with the superposition of the color layer 27, the position of the resonance spectrum shifts, and the product exhibits complex color changes. When the observation angle changes, the resonance frequency will move, so that the colorful dynamic color-changing film of the present invention has a color-changing effect at the same time. Therefore, by superimposing the color layer 27 to absorb colors of different wavelengths, the wavelength of the final reflected light is changed instead of the color presented by the original resonance structure, thus achieving a strong (ie, darker color) and complex color change effect, thereby Enhance the sense of vision, and enhance the anti-counterfeiting effect.
  • the product of this embodiment has the dual anti-counterfeiting effects of dynamic zooming changes of micro-graphics and complex color changes when rotating, and the anti-counterfeiting strength is extremely high.
  • the micro-mirror dynamic optical variable film provided by the third embodiment of the present invention includes a micro-lens array layer 32, a base film 31, an information layer 33, an upper dielectric layer 34, an intermediate dielectric layer 35, and a lower dielectric layer in sequence. 36.
  • the information layer 33 is in contact with the upper dielectric layer 34, and the upper dielectric layer 34, the middle dielectric layer 35, and the lower dielectric layer 36 form a slab waveguide resonant structure that changes color as the viewing angle changes.
  • micro-mirror dynamic light-changing film of this embodiment further includes a dielectric protective layer 38, a transparent protective layer 39, a pressure-sensitive adhesive layer 310, and a release paper layer 311, and
  • the information layer 33 is provided with two micro-graphic layers.
  • the dynamic light change film of the micromirror of this embodiment will be described in detail below.
  • the two micro-graphic layers are the first micro-graphic layer 331 and the second micro-graphic layer 332; the first micro-graphic layer 331 is located on the lower surface of the base film 31, and the second micro-graphic layer 332 is laid on the first micro-graphic layer 331.
  • the thickness of the first micro-graphic layer 331 and the second micro-graphic layer 332 is set corresponding to the focal length of the micro lens, and the micro-graphic information in the two micro-graphic layers is correspondingly staggered. Therefore, the micro-mirror dynamic optical variable film has a variety of anti-counterfeiting functions, thereby enhancing the anti-counterfeiting ability.
  • the moiré magnification effect is formed by the micro lens, so that each micro graphic information forms a multi-layer dynamic three-dimensional anti-counterfeiting effect, thereby increasing the anti-counterfeiting effect.
  • the micro-graphic information of each micro-graphic layer observed through the micro-lens array layer 12 shows a partial or entire layout on the micro-mirror dynamic optically variable film.
  • the ink 60 is scraped at the micro-graphic groove 50 of the first micro-graphic layer 331, and the ink 60 follows the shape of the micro-graphic groove 50 to form micro-graphic information, so that the micro-graphic information has colors and increases prominence. sex.
  • the micro-graphic information of the second micro-graphic layer 332 is the micro-graphic groove 50.
  • the information layer 33 is provided with at least three micrograph and text layers, and the micrograph and text information arrangement positions of the micrograph and text layers are staggered with each other.
  • the micro-graphic information in each micro-graphic layer can be the same or different.
  • the micro-graphic information of the same micro-graphic layer can be a single type, or multiple combinations, such as a combination of graphics, text and images, or a single Kind of.
  • the dielectric protection layer 38 is arranged on the side of the microlens array layer 32 away from the base film 31, the transparent protection layer 39 is arranged on the side of the dielectric protection layer 38 away from the microlens array layer 32, and the pressure-sensitive adhesive layer 310 is arranged on the color layer 37 away from the base film 31.
  • the release paper layer 311 is disposed on the side of the pressure-sensitive adhesive layer 310 away from the color layer 37.
  • a transparent protective layer 39 is provided outside the dielectric protective layer 38.
  • the dielectric protective layer 38 protects the structure of the microlens array layer 32 from being damaged, and the transparent protective layer 39 meets the performance requirements of the product under the conditions of use.
  • the release paper layer 311 When in use, the release paper layer 311 is peeled off, and the pressure-sensitive adhesive layer 310 is attached to the use substrate.
  • the product provided by this embodiment is convenient to use; it has the effect of dynamically zooming in on images and texts and the effect of changing colors, and the anti-counterfeiting degree is extremely high.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Optical Filters (AREA)

Abstract

L'invention concerne un film photochromique dynamique à micromiroirs, comprenant successivement une couche de réseau de microlentilles (12), un film de base (11), une couche d'informations (13), une couche de milieu supérieur (14), une couche de milieu intermédiaire (15) et une couche de milieu inférieur (16), la couche d'informations (13) étant en contact avec la couche de milieu supérieur (14), et la couche de milieu supérieur (14), la couche de milieu intermédiaire (15) et la couche de milieu inférieur (16) formant une structure changeant de couleur qui présente un changement de couleur conjointement avec un changement d'angle de vue. La couche de milieu supérieur (14), la couche de milieu intermédiaire (15) et la couche de milieu inférieur (16) forment la structure de changement de couleur qui présente un changement de couleur conjointement avec un changement d'angle de vue, de telle sorte que le film photochromique dynamique à micromiroirs présente les doubles effets anti-contrefaçon que sont le changement dynamique de grossissement de micro-motif et le changement de couleur lorsqu'il est tourné.
PCT/CN2020/126841 2020-04-29 2020-11-05 Film photochromique dynamique à micromiroirs WO2021218100A1 (fr)

Applications Claiming Priority (2)

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CN202020695385.9 2020-04-29
CN202020695385.9U CN211787903U (zh) 2020-04-29 2020-04-29 一种微镜动态光变膜

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114633572A (zh) * 2022-03-02 2022-06-17 武汉华工图像技术开发有限公司 一种光变防伪刮刮墨、刮刮墨产品及其制备方法
CN114708787A (zh) * 2022-03-14 2022-07-05 武汉华工图像技术开发有限公司 一种3d防伪膜、3d防伪膜的制造方法及3d防伪标签

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CN113554933A (zh) * 2020-04-24 2021-10-26 苏州苏大维格科技集团股份有限公司 一种多彩变色膜
CN211787903U (zh) * 2020-04-29 2020-10-27 苏州苏大维格科技集团股份有限公司 一种微镜动态光变膜

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CN209765087U (zh) * 2019-04-09 2019-12-10 苏州苏大维格科技集团股份有限公司 一种多层动态防伪薄膜
CN211787903U (zh) * 2020-04-29 2020-10-27 苏州苏大维格科技集团股份有限公司 一种微镜动态光变膜

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CN1123921A (zh) * 1993-12-27 1996-06-05 凸版印刷株式会社 透明的全息封条
JPH08272301A (ja) * 1995-03-31 1996-10-18 Toppan Printing Co Ltd 不可視情報記録シール
CN103921582A (zh) * 2014-02-24 2014-07-16 苏州大学 一种变色烫印膜及其制造方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114633572A (zh) * 2022-03-02 2022-06-17 武汉华工图像技术开发有限公司 一种光变防伪刮刮墨、刮刮墨产品及其制备方法
CN114633572B (zh) * 2022-03-02 2023-12-01 武汉华工图像技术开发有限公司 一种光变防伪刮刮墨、刮刮墨产品及其制备方法
CN114708787A (zh) * 2022-03-14 2022-07-05 武汉华工图像技术开发有限公司 一种3d防伪膜、3d防伪膜的制造方法及3d防伪标签
CN114708787B (zh) * 2022-03-14 2023-10-03 武汉华工图像技术开发有限公司 一种3d防伪膜、3d防伪膜的制造方法及3d防伪标签

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