Three-dimensional microstructure anti-counterfeiting device based on multi-latent-image composite structure, anti-counterfeiting product and production equipment

Abstract

The invention discloses a three-dimensional microstructure anti-counterfeiting device based on a multi-latent-image composite structure. The three-dimensional microstructure anti-counterfeiting device comprises at least one anti-counterfeiting image area, the anti-fake image area comprises a plurality of latent image areas used for presenting latent images and a background area used for forming a ground color, and the multiple latent image areas are arranged to present corresponding optical effects at different observation angles so as to achieve directional selective presentation of the multiple latent images; the latent image area and the background area are both composed of a plurality of three-dimensional microstructure sets, each three-dimensional microstructure set comprises a plurality of three-dimensional microstructure units, and each three-dimensional microstructure unit is provided with a fixed plane angle and at least one optical reflection surface. An anti-fake product comprises a polymer base material and the anti-fake device, and the anti-fake device is formed on the surface of the polymer base material through an ink-jet printing technology. The invention relates to the technical field of anti-counterfeiting, adopts innovative three-dimensional microstructure set arrangement and supports an ink-jet printing process one-time forming technology, so that the difficulty of a preparation process is reduced, and meanwhile, the double-channel anti-counterfeiting effect of visual characteristics and touch characteristics is realized.

Description

Technical Field

[0001] This application relates to the field of anti-counterfeiting technology, and in particular to a three-dimensional microstructure anti-counterfeiting device and anti-counterfeiting product based on a multi-latent image composite structure. Background Technology

[0002] With increasing domestic population mobility and a complex and volatile international situation, the requirements for anti-counterfeiting technologies in various security and anti-counterfeiting documents, such as identity cards and entry / exit documents, are becoming increasingly stringent. At the same time, the efficiency of verification for these documents is also being demanded. Level 1 security and anti-counterfeiting elements (also known as "visual authentication elements") are essential for protecting security and anti-counterfeiting documents, and higher requirements are being placed on their technical complexity, ease of processing, processing costs, verification capabilities, and anti-copying properties.

[0003] Existing visual authentication elements mostly focus on a single optical effect or a single tactile effect, lacking the fusion of multiple information; the resolution of microstructures is limited by the plate-making method, resulting in a low capacity for hidden information; the process often relies on vacuum metallization, molding or screen printing, which involves large equipment investment and high energy consumption; some solutions only provide a rough tactile feel or a one-way bright effect, lacking comprehensive features such as variable animation, anti-copying, and latent images, resulting in insufficient overall anti-counterfeiting strength.

[0004] For example, the anti-counterfeiting label for plastic film disclosed in Chinese patent CN216469724U involves vacuum-plating aluminum onto the front of a PET film after microstructures are molded using pressure rollers, followed by overprinting of patterns and the application of a transparent plastic sheet. The width of the microstructures in this solution is limited by the precision of the hard roller engraving, resulting only in visible rough grooves to create a general three-dimensional gloss and tactile feel. Due to the coarse texture scale, it is impossible to further encode details such as latent images, dynamic animations, or directional gradients within the area, leading to limited anti-counterfeiting information and remaining at the level of coarse texture and metallic sheen.

[0005] For example, the holographic version of the Mayden texture disclosed in Chinese patent CN206598645U uses a digital holographic lithography machine to carve 0.0025mm² square pixels on a nickel plate, arranging diffraction blocks in a regular lattice. Although the pixel spacing is reduced compared to the aforementioned schemes, it is still a regular square dot array of a single depth, unable to achieve varying linewidths, staggered directions, or multi-level height superposition. During molding replication, this dot arrangement is expanded to the hundreds of micrometers level, ultimately still presenting a coarse grid appearance, only producing static diffraction spots, lacking fine dynamic or tactile difference information.

[0006] In summary, most current anti-counterfeiting labels and holographic plates rely on rolling or electroforming processes to form wide, regular patterns, resulting in complex manufacturing processes. Furthermore, key areas, such as portraits or logos, only offer a rough tactile feel and a one-way high-brightness effect, limiting the capacity for hidden information and lacking the ability to simultaneously carry multiple layers of anti-counterfeiting information within the same area. These shortcomings lead to insufficient anti-counterfeiting strength and also restrict production efficiency and cost optimization. Summary of the Invention

[0007] In view of this, this application provides an anti-counterfeiting device and anti-counterfeiting product in order to at least partially solve the above-mentioned technical problems.

[0008] On the one hand, this application provides a three-dimensional microstructure anti-counterfeiting device based on a multi-latent image composite structure, the device including at least one anti-counterfeiting image area; The anti-counterfeiting image area includes multiple latent image areas for presenting latent images and a background area for forming a background color. The multiple latent image areas are configured to present corresponding optical effects under different viewing angles to achieve directional selective display of multiple latent images. Both the latent image areas and the background area are composed of several sets of three-dimensional microstructures. The sets of three-dimensional microstructures include several three-dimensional microstructure units. Each three-dimensional microstructure unit has a fixed plane angle and at least one optical reflective surface. The three-dimensional microstructure units within the same three-dimensional microstructure set are the same or approximately the same in depth and plane angle; among several three-dimensional microstructure sets arranged between different latent image regions and / or between latent image regions and background regions, at least one pair of three-dimensional microstructure sets differs in geometric parameters, including: plane angle, height, line width, fill density, line form, line direction, groove cross-section, groove curvature, width-to-depth ratio, lattice size, and lattice spacing; The device has visual anti-counterfeiting features and tactile anti-counterfeiting features. The surface texture of the three-dimensional microstructure assembly constitutes the tactile anti-counterfeiting feature, and the optical effect of the anti-counterfeiting image area constitutes the visual anti-counterfeiting feature.

[0009] The aforementioned anti-counterfeiting devices may also have the following characteristics: The latent image area and the background area are arranged in a partitioned manner, with the background area located outside the latent image area; The anti-counterfeiting image area includes a first latent image area and a second latent image area, with the first latent image area and the second latent image area partially overlapping; the non-overlapping area of ​​the first latent image area is set as area A, the overlapping area is set as area B, the non-overlapping area of ​​the second latent image area is set as area C, and the background area is set as area D.

[0010] The aforementioned anti-counterfeiting devices may also have the following characteristics: The planar angles of the three-dimensional microstructure units in regions A, B, C, and D are set to increase by 45° or decrease by 45° sequentially.

[0011] The aforementioned anti-counterfeiting devices may also have the following characteristics: Region B is simultaneously filled with the same three-dimensional microstructure units as Region A and Region C.

[0012] The aforementioned anti-counterfeiting devices may also have the following characteristics: The three-dimensional microstructure units in region A and region B have the same or similar plane angles but different line widths. The three-dimensional microstructure units in region C and region D have the same or similar plane angles but different line widths. The plane angles of region A and region C are set to be perpendicular or approximately perpendicular to each other.

[0013] The aforementioned anti-counterfeiting devices may also have the following characteristics: The latent image area and the background area are arranged in a superimposed manner, with the latent image area superimposed on the background area; The anti-counterfeiting image area includes a first latent image area and a second latent image area, with the first latent image area and the second latent image area partially overlapping.

[0014] The aforementioned anti-counterfeiting devices may also have the following characteristics: The background area is divided into repeating grid units, each grid unit comprising a plurality of closely arranged polygons, the polygons including at least one of triangles, quadrilaterals, pentagons, and hexagons; adjacent polygons are respectively filled with a set of three-dimensional microstructures having a first plane angle and a second plane angle, the first plane angle and the second plane angle being perpendicular or approximately perpendicular to each other; the first latent image area is configured to be filled with a set of three-dimensional microstructures having the first plane angle, and the second latent image area is configured to be filled with a set of three-dimensional microstructures having the second plane angle.

[0015] The aforementioned anti-counterfeiting devices may also have the following characteristics: The anti-counterfeiting image area includes a first latent image area and a second latent image area, wherein the first latent image area and the second latent image area do not overlap at all. In another aspect, this application also provides an anti-counterfeiting product, including a polymer substrate and the aforementioned anti-counterfeiting device, wherein the anti-counterfeiting device is formed on the surface of the polymer substrate by an inkjet printing process; the inkjet printing material includes transparent photocurable ink, the polymer substrate is a polymer plate, sheet or film, and the surface roughness Ra of the polymer substrate is set to be less than 20.

[0016] Furthermore, this application also provides production equipment for an anti-counterfeiting device, the equipment being used for the aforementioned anti-counterfeiting device. The anti-counterfeiting device is configured to support anti-counterfeiting software and can create personalized patterns.

[0017] This application achieves combined control of latent image and background color by setting multiple latent image areas and background areas within the anti-counterfeiting image area, and arranging several sets of three-dimensional microstructures in different areas. Through the optimal setting of the three-dimensional microstructure sets, the following technical effects are obtained: 1) Significantly selective orientation: This application sets multiple latent image areas and background areas in the anti-counterfeiting image area at the same time, and introduces at least one difference in geometric parameters between latent image areas and / or between latent image areas and background areas, especially the difference in plane angle, so that different latent image areas show corresponding optical effects under different viewing angles, thereby forming a selective orientation of multiple latent images, which enhances the dynamic recognition and security of anti-counterfeiting images.

[0018] 2) Improved optical consistency and visual clarity: This application uses several sets of three-dimensional microstructures to make up both the latent image area and the background area, and maintains the consistency of the three-dimensional microstructure units in depth and plane angle within the same set, so that the reflection direction of the set is concentrated, which significantly improves the contrast and display clarity of the optical image and effectively avoids light scattering blur caused by parameter dispersion.

[0019] 3) Visual and tactile dual-channel anti-counterfeiting: This application optimizes the surface texture of the three-dimensional microstructure assembly to form micro-undulations that can be perceived by touch on a macroscopic level, while forming latent image manifestation at the optical level. This simultaneously obtains visual and tactile anti-counterfeiting features, establishing a dual-channel identification system that significantly improves the difficulty of counterfeiting and the level of protection.

[0020] 4) Simplified manufacturing process and efficiency advantages: The three-dimensional microstructure set of this application is suitable for precision forming processes such as inkjet printing. It can form high-precision lines on the surface of polymer substrates in one step, avoiding the high energy consumption and multiple complex processes of traditional molding and coating processes. It significantly reduces manufacturing costs and improves production efficiency, and has obvious advantages for industrial application.

[0021] Therefore, this application achieves selective display of latent images at different viewing angles by using multiple latent image areas and background areas in a partitioned or superimposed combination within the anti-counterfeiting image area, and by introducing preferred differences in geometric parameters such as plane angles between latent image areas and / or between latent image areas and background areas; by maintaining consistent depth and plane angles within the same set, it ensures concentrated reflection direction and image clarity; furthermore, by setting the surface texture of the three-dimensional microstructure, it simultaneously obtains optical display and tactile features in the same printing process, thereby achieving a dual-channel anti-counterfeiting effect, and also possessing the advantages of low energy consumption and high efficiency in manufacturing.

[0022] In summary, this application achieves directional selective display of multiple latent images, clarity of the displayed image, and dual-channel anti-counterfeiting recognition of vision and touch by rationally distributing the latent image area and background area, consistent design of the three-dimensional microstructure set, differentiated setting of geometric parameters between different areas, and functional construction of surface texture. It also has the advantages of low energy consumption and high efficiency in manufacturing, thus significantly improving the security and application value of the anti-counterfeiting device as a whole.

[0023] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0025] Figure 1 Top view schematic diagram of the anti-counterfeiting device supporting dual latent image anti-counterfeiting effect provided in the embodiments of this application. Figure 1 ; Figure 2 for Figure 1 An exploded view of the anti-counterfeiting device; Figure 3 Top view schematic diagram of the anti-counterfeiting device supporting dual latent image anti-counterfeiting effect provided in the embodiments of this application. Figure 2 ; Figure 4 for Figure 3 An exploded view of the anti-counterfeiting device; Figure 5 Exploded view of the anti-counterfeiting device supporting dual latent image anti-counterfeiting effect provided in the embodiments of this application. Figure 3 ; Figure 6 Exploded view of the anti-counterfeiting device supporting dual latent image anti-counterfeiting effect provided in the embodiments of this application. Figure 4 . Detailed Implementation

[0026] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0027] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0028] Furthermore, in describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described in this application, to the extent that the method or process does not depend on the specific order of steps described herein. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to performing the steps in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0029] An exemplary embodiment provides a three-dimensional microstructure anti-counterfeiting device based on a multi-latent image composite structure, which includes at least one anti-counterfeiting image area; the anti-counterfeiting image area includes multiple latent image areas for presenting latent images and a background area for forming a background color, the multiple latent image areas are configured to present corresponding optical effects at different viewing angles to achieve directional selective display of multiple latent images; both the latent image area and the background area are composed of several sets of three-dimensional microstructures, the sets of three-dimensional microstructures include several three-dimensional microstructure units, the three-dimensional microstructure units have fixed plane angles and at least one optical reflective surface.

[0030] In specific operation, the anti-counterfeiting image area in the above embodiments can contain two, three, four, or even more latent image areas. Each latent image area can be set independently or partially overlap with other latent image areas, thereby forming a more complex latent image distribution pattern. The background area can serve as a separating area around the latent image areas to highlight the latent image, or it can serve as a uniform background layer on which multiple latent image areas are superimposed. The combination of different latent image areas and background areas can take various forms, such as: multiple latent image areas not overlapping at all to achieve the display of multiple sets of independent latent images; multiple latent image areas partially overlapping to form new composite optical features in the overlapping area; and multiple latent image areas all superimposed on the background area to enhance the intensity of directional selective display. Through the above combination settings, differences can be formed in geometric parameters such as plane angle, height, line width, or fill density between latent image areas and between latent image areas and background areas, thereby constructing multi-layered optical interference and reflection effects and improving the complexity and uniqueness of the anti-counterfeiting image.

[0031] Compared with existing related technologies, the anti-counterfeiting device provided in the above embodiments has higher anti-counterfeiting security and technological advancement. By setting multiple latent image areas and combining them with various background area arrangements, the device achieves selective display of latent images at different viewing angles, forming a dynamic multi-image switching effect. The overlapping and non-overlapping design between latent image areas further enhances the sense of layering and complexity of the optical image, significantly increasing the difficulty of counterfeiting. The combined control of multiple latent images and background areas enables the device to simultaneously possess clear background color contrast and complex latent image interference effects, ensuring high image recognition and uniqueness. The overall solution not only achieves a high level of visual anti-counterfeiting but also incorporates a tactile recognition channel, forming a multi-dimensional and multi-layered comprehensive anti-counterfeiting system.

[0032] In this embodiment, the three-dimensional microstructure units within the same three-dimensional microstructure set are the same or approximately the same in depth and plane angle; among several three-dimensional microstructure sets arranged between different latent image areas and / or between latent image areas and background areas, at least one pair of three-dimensional microstructure sets differs in geometric parameters, including: plane angle, height, line width, fill density, line form, line direction, groove cross-section, groove curvature, width-to-depth ratio, lattice size, and lattice spacing; in addition, the device provided in this embodiment has visual anti-counterfeiting features and tactile anti-counterfeiting features, the surface texture of the three-dimensional microstructure set constitutes the tactile anti-counterfeiting feature, and the optical effect of the anti-counterfeiting image area constitutes the visual anti-counterfeiting feature.

[0033] In practice, the three-dimensional microstructure set in the above embodiments can be flexibly configured according to design requirements. Microstructure units within the same set maintain consistency or approximate consistency in depth and plane angle to ensure concentrated optical reflection direction; while between different latent image regions and / or between latent image regions and background regions, multi-layered optical effects can be achieved by selectively introducing differences in geometric parameters. Geometric parameters can include: differences in planar angles (e.g., 0°, 30°, 45°, 60°, 90°), height differences (e.g., 0.1μm–10μm), line width differences (e.g., 100nm–20μm), fill density differences (e.g., 20%–95%), line shapes (e.g., straight, wavy, zigzag, circular, spiral), line directions (e.g., horizontal, vertical, oblique), groove cross-section differences (e.g., rectangular, trapezoidal, arc-shaped), groove curvature differences (e.g., radius 0.1μm–5μm), aspect ratio differences (e.g., 1:1, 1:2, 1:5), dot matrix size differences (e.g., 0.5μm–50μm), and dot matrix spacing differences (e.g., 0.1μm–10μm). These parameters can be adjusted individually or combined to enhance complexity. For example, while maintaining consistent planar angles, differences in height and fill density can be introduced, or different line shapes and dot matrix sizes can be set in different latent areas to achieve richer visual representations. The specific selection and combination of the above geometric parameters are only optional means to achieve optical differences. Those skilled in the art can replace or change them according to actual needs, which does not affect the overall concept of this application.

[0034] It should be noted that the innovation of this application does not lie in the selection of a single geometric parameter or its specific numerical setting, but rather in the combination of directional selective display of multiple latent image areas, optical contrast of the background area, the internal consistency and cross-regional differentiation design of the three-dimensional microstructure assembly, and the integration of visual and tactile dual-channel anti-counterfeiting features, forming a systematic and integrated innovative anti-counterfeiting solution. This solution can achieve a high level of anti-counterfeiting effect while ensuring pattern clarity. Its core advantage comes from the synergy of the overall structure and function, rather than the isolated selection of individual parameters.

[0035] Compared with existing related technologies, the anti-counterfeiting device provided in the above embodiments has dual anti-counterfeiting advantages and high structural adjustability. On the one hand, by introducing multi-dimensional geometric parameter differences between the latent image area and the background area, the latent image is selectively displayed at different viewing angles, forming multi-layered and multi-angle optical interference and reflection effects, significantly enhancing the uniqueness and complexity of visual anti-counterfeiting. On the other hand, through the fine design of the microstructure surface texture, the device is endowed with tactile features, realizing dual-channel anti-counterfeiting identification of vision and touch, further improving the protection level and the difficulty of counterfeiting. The overall solution not only has strong controllability in optical display effects, but also has significant advantages in security and application reliability, and can meet the needs of high-level anti-counterfeiting applications.

[0036] Combination Figures 1-5 As shown, an exemplary embodiment provides an anti-counterfeiting device, wherein the latent image area and the background area are arranged in a partitioned manner, and the background area is located outside the latent image area; the anti-counterfeiting image area includes a first latent image area and a second latent image area, the first latent image area and the second latent image area partially overlap; the non-overlapping area of ​​the first latent image area is set as area A, the overlapping area is set as area B, the non-overlapping area of ​​the second latent image area is set as area C, and the background area is set as area D.

[0037] In specific operation, the anti-counterfeiting image area in the above embodiment adopts a partitioned arrangement, with the background area located in the outer region of the latent image area to serve as a backdrop for the latent image pattern. The anti-counterfeiting image area includes at least a first latent image area and a second latent image area, which partially overlap. Each of the above areas is composed of several sets of three-dimensional microstructures, and differences in geometric parameters such as plane angle, height, line width, fill density, and dot matrix size can be introduced between different areas. Through this type of area division and parameter differentiation design, areas A, B, C, and D can be distinguished from each other in terms of optical features, achieving a layered effect in latent image display.

[0038] Combination Figures 1-2 As shown, an exemplary embodiment provides an anti-counterfeiting device where the plane angles of the three-dimensional microstructure units in regions A, B, C, and D are set to increase or decrease by 45° sequentially. In specific operation, the effect of dual latent images can be achieved through angle gradient design: plane angles of 0°, 45°, 90°, and 135° are selected in regions A, B, C, and D respectively, while maintaining a consistent unit depth in each region. As the observation angle changes, the difference in plane angles causes a selective change in the reflection direction, causing the first and second latent images to appear sequentially under different observation directions, thereby achieving the anti-counterfeiting effect of dual latent images.

[0039] Combination Figures 3-4As shown, an exemplary embodiment provides an anti-counterfeiting device in which the same three-dimensional microstructure units as those in regions A and C are simultaneously filled in region B. In specific operation, the effect of dual latent images can be achieved through a superimposed filling design: the microstructure units used in regions A and C are alternately superimposed in the overlapping area B, maintaining the same depth for both types of units, but with a 90° difference in planar angle. Through observation from different angles, region B will selectively display either latent image A or latent image C according to the reflection direction, thereby achieving a dynamic switching effect of dual latent images and enhancing the anti-counterfeiting complexity of the local area.

[0040] An exemplary embodiment provides an anti-counterfeiting device. Three-dimensional microstructure units in regions A and B have the same or similar plane angles but different line widths. Similarly, three-dimensional microstructure units in regions C and D have the same or similar plane angles but different line widths. Furthermore, the plane angles of regions A and C are set to be perpendicular or approximately perpendicular to each other. In specific operation, the effect of dual latent images can be achieved through line width and angle differences: the difference in reflection intensity is controlled by changing the line width in adjacent regions, while the difference in reflection direction is controlled by utilizing the perpendicular plane angles between regions. This design, while ensuring overall optical consistency, further enhances the distinguishability between latent image areas, achieving a clearly discernible dual latent image display effect.

[0041] like Figure 5 As shown, the dual latent image effect can be achieved through contrast width design: areas A and D uniformly use 60µm wide three-dimensional microstructure units, while areas B and C uniformly use 80µm wide three-dimensional microstructure units; areas A and B uniformly use three-dimensional microstructure units with a plane angle of 0°, while areas C and D uniformly use three-dimensional microstructure units with a plane angle of 90°. Through the combination of two sets of plane angles differing by 90° and line width differences, when the observation angle changes, the reflection direction and intensity exhibit significant differences, thereby achieving directional selective display of the dual latent image and achieving a stable and excellent anti-counterfeiting effect.

[0042] An exemplary embodiment provides an anti-counterfeiting device in which the latent image area and the background area are arranged in an overlay manner, with the latent image area overlaying the background area; the anti-counterfeiting image area includes a first latent image area and a second latent image area, with the first latent image area and the second latent image area partially overlapping.

[0043] In specific operation, the anti-counterfeiting image area in the above embodiments adopts a superimposed arrangement, that is, the latent image area is stacked on top of the background area. The background area can be composed of a uniformly arranged set of three-dimensional microstructures to provide an overall background color contrast; the latent image area set on top of it is composed of several differentially designed sets of three-dimensional microstructures to form a recognizable latent image pattern. The anti-counterfeiting image area includes at least a first latent image area and a second latent image area, which partially overlap: a part of the first latent image area overlaps with the second latent image area to form a composite optical interference area, while the remaining parts are displayed independently. Differences can be introduced in the geometric parameters of the three-dimensional microstructure sets in different areas, such as adjusting the plane angle, height, line direction, or lattice size, so that the overlapping area can both display the optical effect of a single area and superimpose to generate new visual features.

[0044] Compared with existing related technologies, the anti-counterfeiting device provided in the above embodiments forms a layered display structure by superimposing latent image areas on the background area, which significantly enhances the sense of layering and complexity of the optical effect; by partially overlapping the first latent image area and the second latent image area, a composite optical interference effect is generated in the overlapping area, so that the anti-counterfeiting image exhibits dynamic changes and diverse displays under different viewing angles; while maintaining the uniformity of the background color, the overall solution introduces a multi-layer superposition design of latent images, which enhances the uniqueness of the image and the difficulty of counterfeiting, and achieves a high level of visual anti-counterfeiting effect.

[0045] An exemplary embodiment provides an anti-counterfeiting device, wherein a background area is divided into repeating grid units, each grid unit comprising a plurality of closely arranged polygons, the polygons including at least one of triangles, quadrilaterals, pentagons, and hexagons; adjacent polygons are respectively filled with a set of three-dimensional microstructures having a first plane angle and a second plane angle, the first plane angle and the second plane angle being perpendicular or approximately perpendicular to each other; a first latent image area is configured to be filled with a set of three-dimensional microstructures having the first plane angle, and a second latent image area is configured to be filled with a set of three-dimensional microstructures having the second plane angle.

[0046] An exemplary embodiment provides an anti-counterfeiting device, wherein the background area is divided into repeating square units, each square unit consisting of four sub-squares of equal size; within the same unit, a first pair of diagonally arranged sub-squares are filled with a set of three-dimensional microstructures having a first plane angle, and another pair of diagonally arranged sub-squares are filled with a set of three-dimensional microstructures having a second plane angle, wherein the first plane angle and the second plane angle are set to be perpendicular or approximately perpendicular to each other; a first latent image area is set to be filled with a set of three-dimensional microstructures having the first plane angle, and a second latent image area is set to be filled with a set of three-dimensional microstructures having the second plane angle.

[0047] like Figure 6As shown, an exemplary embodiment provides an anti-counterfeiting device. The effect of dual latent images can be achieved through a checkerboard unit design: the anti-counterfeiting image area is divided into equilateral checkerboard-like grid units, i.e., composed of 2*2 equal-sized sub-squares; three-dimensional microstructure sets with 45° and -45° plane angles are arranged on the two diagonals of each grid unit, respectively. The first latent image area (the square area on the left in the figure) selects the three-dimensional microstructure set with a 45° plane angle, and the second latent image area (the circular area in the middle in the figure) selects the three-dimensional microstructure set with a -45° plane angle. The entire anti-counterfeiting image area (the overall area on the right in the figure) is set as the aforementioned grid unit configuration, serving as the base of the anti-counterfeiting image; by changing the observer's viewing angle, the anti-counterfeiting effect of dual latent images is achieved.

[0048] Compared with existing related technologies, the dual latent image layout provided in the above embodiments has advantages such as high viewpoint selectivity, low image interference, wide processing tolerance, and large recognition window; through the combined control of planar angle, line width and spatial superposition, a higher level of anti-counterfeiting technology effect is achieved.

[0049] An exemplary embodiment provides an anti-counterfeiting device. The anti-counterfeiting image area includes a first latent image area and a second latent image area, which are completely non-overlapping. In specific operation, the first and second latent image areas are respectively arranged at different positions in the background area, forming spatially isolated independent latent image displays. Different latent image areas can use different three-dimensional microstructure set parameters. For example, the first latent image area is constructed by fixing the plane angle and a specific fill density, while the second latent image area is constructed by adjusting the line width or the lattice size. The non-overlapping arrangement avoids complex interference of microstructure sets in the superposition area, allowing each latent image to function independently at its corresponding viewing angle. The background area forms a uniform background color through a uniform three-dimensional microstructure set, enhancing the contrast effect between the latent image and the background color.

[0050] Compared with existing related technologies, the anti-counterfeiting device provided in the above embodiment, although having a slightly lower anti-counterfeiting level than the partially overlapping latent image design, still has significant advantages: On the one hand, completely non-overlapping latent image areas ensure that each latent image remains spatially independent, reducing optical interference and significantly improving the clarity and stability of the display; on the other hand, this solution is simpler in terms of process implementation, avoiding the fine control requirements of the superimposed area, and facilitating large-scale application of inkjet printing or other precision forming processes. Therefore, this embodiment still possesses excellent directional selectivity display effect and manufacturing efficiency advantages, and can be used as a medium-to-high level anti-counterfeiting solution.

[0051] An exemplary embodiment provides an anti-counterfeiting device in which the latent image area and the background area are arranged in a superimposed manner, that is, the latent image area forms a layered structure on top of the background area to enhance the overall sense of layering and optical contrast. The anti-counterfeiting image area includes a first latent image area and a second latent image area, and the first latent image area and the second latent image area do not overlap at all. In specific operation, the first latent image area and the second latent image area can be independently arranged as a set of three-dimensional microstructures with different planar angles, and the two are completely separated in spatial position to avoid cross-interference between latent images. The background area provides a uniform background color, so that each latent image has clear boundaries and good contrast when it is displayed independently.

[0052] Compared with existing related technologies, the above embodiments enhance the overall sense of layering through a stacked structure, while ensuring clear pattern boundaries by preventing latent image areas from overlapping, thus achieving directional selective display of multiple latent images. Compared with partially overlapping schemes, this design maintains a high level of anti-counterfeiting and excellent visual performance while ensuring ease of process implementation and pattern recognition, making it particularly suitable for anti-counterfeiting applications with high requirements for pattern clarity and recognition reliability.

[0053] An exemplary embodiment provides an anti-counterfeiting product, including a polymer substrate and the aforementioned anti-counterfeiting device. The anti-counterfeiting device is configured to be formed on the surface of the polymer substrate by an inkjet printing process. The inkjet printing material includes transparent UV-curable ink. The polymer substrate is a polymer plate, sheet, or film. The surface roughness of the polymer substrate is set to less than 20 to achieve a near-mirror-like technical effect. The transparent UV-curable ink is a varnish or a transparent or semi-transparent ink with a similar varnish effect.

[0054] In specific operation, the anti-counterfeiting product in the above embodiments can adopt the following process route: First, select a polymer substrate with a surface close to a flat mirror finish. This substrate can be a sheet, film, or plate, and the material is not limited to: polyester (PC polycarbonate, PET polyethylene terephthalate, TPU thermoplastic polyurethane elastomer), PVC polyvinyl chloride, PTFE polytetrafluoroethylene, and other polymers and combinations thereof. The substrate thickness is preferably 0.4 mm or more. The average surface roughness of the substrate can be controlled at the nanometer level to ensure complete optical reflection formation. Subsequently, using UV-curable transparent inkjet ink, the three-dimensional microstructure is sprayed layer by layer and simultaneously cured. The thickness of each layer is maintained at the micrometer level, and the total thickness can be flexibly set according to the pattern design. During the printing process, measures such as substrate flatness management, temperature control, and tension adjustment can be used to ensure stable line edges and clear microstructure contours.

[0055] Compared with existing related technologies, the anti-counterfeiting products provided in the above embodiments have the comprehensive advantages of rapid single-pass inkjet manufacturing, high transparency layering, and wide substrate adaptability. They can directly obtain high-precision microstructures on polymer carriers of different thicknesses and hardnesses, thereby significantly improving the brightness, clarity, and durability of anti-counterfeiting images while reducing processes and energy consumption.

[0056] An exemplary embodiment provides a production equipment for an anti-counterfeiting device, which can realize customized applications, including the aforementioned anti-counterfeiting device, and the anti-counterfeiting device is configured to support anti-counterfeiting software to realize the production of personalized patterns.

[0057] The customized application of the anti-counterfeiting device in the above embodiments can generate personalized patterns through anti-counterfeiting software, supporting flexible settings for the number, distribution, and geometric parameters of latent images. It can also directly output process control files to drive precision forming processes such as inkjet printing. The system simultaneously integrates a material database and optical simulation to achieve effect preview and manufacturability verification, and provides production security encryption and parameter calibration functions. Compared with existing related technologies, the customized application provided by the above embodiments has the advantages of rapid generation, manufacturability assurance, and integration of dual anti-counterfeiting features, realizing the efficient, secure, and industrial application of personalized patterns.

Claims

1. A three-dimensional microstructure anti-counterfeiting device based on a multi-latent image composite structure, the device comprising at least one anti-counterfeiting image area, characterized in that, The anti-counterfeiting image area includes multiple latent image areas for presenting latent images and a background area for forming a background color. The multiple latent image areas are configured to present corresponding optical effects under different viewing angles to achieve directional selective display of multiple latent images. Both the latent image areas and the background area are composed of several sets of three-dimensional microstructures. The sets of three-dimensional microstructures include several three-dimensional microstructure units. Each three-dimensional microstructure unit has a fixed plane angle and at least one optical reflective surface. The three-dimensional microstructure units within the same three-dimensional microstructure set are the same or approximately the same in depth and plane angle; among several three-dimensional microstructure sets arranged between different latent image regions and / or between latent image regions and background regions, at least one pair of three-dimensional microstructure sets differs in geometric parameters, including: plane angle, height, line width, fill density, line form, line direction, groove cross-section, groove curvature, width-to-depth ratio, lattice size, and lattice spacing; The device has visual anti-counterfeiting features and tactile anti-counterfeiting features. The surface texture of the three-dimensional microstructure assembly constitutes the tactile anti-counterfeiting feature, and the optical effect of the anti-counterfeiting image area constitutes the visual anti-counterfeiting feature.

2. The anti-counterfeiting device according to claim 1, characterized in that, The latent image area and the background area are arranged in a partitioned manner, with the background area located outside the latent image area; The anti-counterfeiting image area includes a first latent image area and a second latent image area, with the first latent image area and the second latent image area partially overlapping; the non-overlapping area of ​​the first latent image area is set as area A, the overlapping area is set as area B, the non-overlapping area of ​​the second latent image area is set as area C, and the background area is set as area D.

3. The anti-counterfeiting device according to claim 2, characterized in that, The planar angles of the three-dimensional microstructure units in regions A, B, C, and D are set to increase by 45° or decrease by 45° sequentially.

4. The anti-counterfeiting device according to claim 2 or 3, characterized in that, Region B is simultaneously filled with the same three-dimensional microstructure units as Region A and Region C.

5. The anti-counterfeiting device according to claim 2 or 3, characterized in that, The three-dimensional microstructure units in region A and region B have the same or similar plane angles but different line widths. The three-dimensional microstructure units in region C and region D have the same or similar plane angles but different line widths. The plane angles of region A and region C are set to be perpendicular or approximately perpendicular to each other.

6. The anti-counterfeiting device according to any one of claims 1-5, characterized in that, The latent image area and the background area are arranged in a superimposed manner, with the latent image area superimposed on the background area; The anti-counterfeiting image area includes a first latent image area and a second latent image area, with the first latent image area and the second latent image area partially overlapping.

7. The anti-counterfeiting device according to any one of claims 1-6, characterized in that, The background area is divided into repeating grid units, each grid unit comprising a plurality of closely arranged polygons, the polygons including at least one of triangles, quadrilaterals, pentagons, and hexagons; adjacent polygons are respectively filled with a set of three-dimensional microstructures having a first plane angle and a second plane angle, the first plane angle and the second plane angle being perpendicular or approximately perpendicular to each other; the first latent image area is configured to be filled with a set of three-dimensional microstructures having the first plane angle, and the second latent image area is configured to be filled with a set of three-dimensional microstructures having the second plane angle.

8. The anti-counterfeiting device according to any one of claims 1-7, characterized in that, The anti-counterfeiting image area includes a first latent image area and a second latent image area, wherein the first latent image area and the second latent image area do not overlap at all.

9. An anti-counterfeiting product, comprising a polymer substrate, characterized in that, It also includes the anti-counterfeiting device as described in any one of claims 1-8, The anti-counterfeiting device is configured to be formed on the surface of the polymer substrate by inkjet printing.

10. Production equipment for an anti-counterfeiting device, characterized in that, The device is used for the anti-counterfeiting device according to any one of claims 1-8. The anti-counterfeiting device is configured to support anti-counterfeiting software and can create personalized patterns.

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