Microtexture Structures and Devices

Abstract

This application relates to a microtextured structure and device. The microtextured structure includes a substrate layer, the surface of which is provided with multiple first microtextured units of identical or similar shapes. These multiple first microtextured units are arranged in an alternating manner and are used to form a visual light and shadow three-dimensional pattern. This technical solution can at least solve the technical problem of complex processing of composite films with visual light and shadow three-dimensional patterns in related technologies.

Description

Technical Field

[0001] This application relates to the field of grating technology, and in particular to a microtexture structure and device. Background Technology

[0002] In related technologies, composite films utilize microlens grating technology, laser technology, and microtext printing technology to create multi-layered structures on the substrate surface, including microlens grating layers, laser holographic layers, and microtext layers. The microlens gratings and microtext layers are then precisely aligned, and the multi-layered structures are superimposed to create a three-dimensional visual pattern. The fabrication of this composite film often involves multiple complex processes, resulting in a relatively long development cycle and high manufacturing costs. Utility Model Content

[0003] This application provides a microtexture structure and device to solve the technical problem of complex processing of composite films with visual light and shadow three-dimensional patterns in related technologies.

[0004] To achieve the above objectives, according to a first aspect of this application, a microtexture structure is provided, comprising: The substrate layer has a plurality of first micro-texture units of the same or similar shape on its surface. The plurality of first micro-texture units are arranged in an alternating manner and are used to form a three-dimensional visual light and shadow pattern.

[0005] Optionally, the first microtexture unit comprises a closed and continuous closed curve texture; or, The first micro-texture unit includes an open curve texture with a maximum orientation angle variation of not less than 90°.

[0006] Optionally, the closed curve texture includes a circular texture or an elliptical texture.

[0007] Optionally, the spacing between the geometric centers of any two adjacent first microtexture units is the same; or, The geometric centers of a plurality of first microtexture units are arranged to form a predetermined pattern, and along the extension direction of the outline of the predetermined pattern, the spacing between the geometric centers of any two adjacent first microtexture units increases or decreases sequentially.

[0008] Optionally, the distance between the geometric centers of two adjacent first microtexture units is L1, where 0.3mm≤L1≤0.5mm.

[0009] Optionally, the first microtexture unit has a first linear texture, the line width of which is D1, wherein 0.03mm≤D1≤0.05mm.

[0010] Optionally, the geometric centers of a plurality of the first microtexture units are arranged to form a predetermined pattern, the predetermined pattern including a square pattern, a linear pattern or a circular pattern.

[0011] Optionally, the predetermined pattern includes the square pattern, the side length of the square pattern is L, and the first micro-texture unit includes a ring-shaped texture, the radius of each ring-shaped texture is d, where L / 2≤d≤L.

[0012] Optionally, the first microtexture unit includes a circular texture, and the predetermined pattern includes the linear pattern. Along the extension direction of the linear pattern, the radius of the circular texture increases or decreases sequentially.

[0013] Optionally, the predetermined pattern includes the square pattern, and the substrate layer is further provided with a plurality of second microtexture units with similar shapes, the geometric centers of the plurality of second microtexture units overlapping and located at the four vertices of the square pattern.

[0014] Optionally, the second microtexture unit includes a circular texture unit.

[0015] Optionally, the spacing between two adjacent second microtexture units is L2, where 0.3mm≤L2≤0.5mm.

[0016] Optionally, the second microtexture unit has a second linear texture, the line width of which is D2, wherein 0.03mm≤D2≤0.05mm.

[0017] Optionally, the substrate layer may include a PET layer or a glass layer.

[0018] According to a second aspect of this application, an apparatus is provided that includes the microtexture structure described above.

[0019] This application employs multiple first microtexture units of identical or similar shapes, arranged in an alternating pattern, to form a three-dimensional visual light and shadow pattern. Essentially, this application is based on a single-layer microtexture structure, precisely designing and fabricating multiple microtexture gratings. By utilizing the changes in reflected light from the microtexture gratings at different viewing angles, a large-area, dynamic, three-dimensional movement of the visual light and shadow pattern is achieved. Simultaneously, by utilizing the binocular parallax and motion parallax characteristics of the human visual system, the visual light and shadow pattern exhibits a sense of depth as it moves, providing a natural spatial three-dimensional visual effect. This design simplifies the structure, reduces production steps, and allows for rapid design-to-sample production, significantly shortening the R&D cycle. Furthermore, it offers relatively low production costs and facilitates large-scale production.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is a schematic diagram of the first type of microtexture structure of preset points disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of various curve textures of the first microtexture unit of the first preset point microtexture structure disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of a preset pattern for the first type of preset point microtexture structure disclosed in the embodiments of this application; Figure 4 This is a schematic diagram showing the relative positions of a single preset point and the corresponding single microtexture grating of the first preset point microtexture structure disclosed in the embodiments of this application; Figure 5 This is a schematic diagram of the light and shadow of the first preset point microtexture structure disclosed in the embodiments of this application from a first perspective; Figure 6 This is a schematic diagram of the light and shadow of the first preset point microtexture structure disclosed in the embodiments of this application from a second perspective; Figure 7 This is a schematic diagram of the light and shadow of the first type of preset point microtexture structure disclosed in the embodiments of this application from a third-person perspective; Figure 8 This is a schematic diagram of the light and shadow changes of the micro-texture structure of the first preset point disclosed in the embodiments of this application; Figure 9 This is a schematic diagram of the second type of preset point microtexture structure disclosed in the embodiments of this application; Figure 10 This is a schematic diagram of the second type of preset point microtexture structure disclosed in the embodiments of this application; Figure 11 This is a schematic diagram of the light and shadow of the second type of preset point microtexture structure disclosed in the embodiments of this application from a fourth perspective; Figure 12This is a schematic diagram of the light and shadow of the second type of preset point microtexture structure disclosed in the embodiments of this application from a fifth perspective; Figure 13 This is a schematic diagram of the light and shadow changes of the micro-texture structure of the second preset point disclosed in the embodiments of this application; Figure 14 This is a schematic diagram of the microtexture structure of the third preset point disclosed in this embodiment.

[0024] Explanation of reference numerals in the attached figures: 100. Microtexture structure; 101. Substrate layer; 10. First micro-texture unit; 11. Closed curve texture; 111. Circular texture; 112. Elliptical texture; 12. Open curve texture; 20. Pre-determined pattern; 21. Square pattern; 22. Linear pattern; 23. Circular pattern; 30. Second micro-texture unit; 31. Circular texture unit. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0026] As described in the background section, the preparation of composite films often involves multiple complex processes, has a relatively long development cycle, and high manufacturing costs. Therefore, this application provides a microtextured structure that simplifies the process of producing composite films with visual light and shadow patterns.

[0027] The microtexture structure of this application will be described in detail below with reference to the accompanying drawings.

[0028] See Figures 1 to 8 As shown, according to a first aspect of this application, a microtexture structure 100 is provided, the microtexture structure 100 including a substrate layer 101.

[0029] Specifically, the surface of the substrate layer 101 is provided with multiple first microtexture units 10 of the same or similar shape. The multiple first microtexture units 10 are arranged in an alternating manner and are used to form a visual light and shadow three-dimensional pattern. It can be understood that "same shape" means that the size, outline and details of the multiple first microtexture units 10 are completely consistent; "similar" means that the outline features and core structural forms of the multiple first microtexture units 10 are consistent, with only minor differences in non-critical dimensions (such as local details, size ratio, edge shape). However, such differences do not affect the core function of forming a visual light and shadow three-dimensional pattern, nor do they increase the production complexity. That is, the "similar" in the application is "similar" in a geometric sense; "alternating arrangement" means that the multiple first microtexture units 10 of the same or similar shape are arranged in an alternating manner on the surface of the substrate layer 101, forming a spatial distribution pattern in which the units echo each other, partially overlap or have uniform gaps.

[0030] In this embodiment, the first microtexture units 10 have the same or similar shapes. It is understood that in actual production, only one basic mold needs to be designed to process the first microtexture units 10. There is no need to develop a customized mold for each first microtexture unit 10. By arranging multiple identical or similar first microtexture units 10 in an interlaced manner, only the arrangement parameters of the first microtexture units 10 on the mold need to be adjusted, which can significantly reduce design and mold investment and lower production costs. At the same time, the interlaced arrangement of the first microtexture units 10 is compatible with mature processes such as photolithography, UV transfer printing, roll forming, and glass etching, enabling the interlaced microtextures to be imprinted onto the surface of a continuous substrate layer 101 in one go, achieving high-speed mass production.

[0031] Furthermore, when multiple identical or similar first microtexture units 10 are arranged in an alternating manner in this application, the light and shadow projection areas of adjacent units will partially overlap (for example, the shadow of the raised part of a unit covers the bright surface of the adjacent unit). Based on this difference in brightness and the misalignment of the contours, combined with the visual system's perception of light and shadow layers as spatial depth, the human eye will perceive the planar microtexture as a three-dimensional structure with varying heights, rather than a monotonous planar texture. Moreover, the alternating arrangement causes the angle of action of the first microtexture units 10 at different positions with the incident light to differ. When the observer changes their viewing angle (such as moving left and right or tilting up and down), some units will switch from a reflective state to a light-blocking state, while others will do the opposite, ultimately presenting a dynamic effect of light and shadow moving with the viewing angle (for example, a regular three-dimensional dot matrix when viewed from the front, and a gradually flowing stripe when viewed from the side), making the visual light and shadow three-dimensional pattern not only three-dimensional but also dynamic, avoiding the rigidity of traditional fixed patterns.

[0032] In other words, this application utilizes a single-layer microtexture structure, precisely designing and fabricating multiple microtexture gratings. By leveraging the changes in reflected light from the microtexture gratings at different viewing angles, it achieves large-area, dynamic, three-dimensional movement of visual light and shadow patterns. Simultaneously, by utilizing the binocular parallax and motion parallax characteristics of the human visual system, the visual light and shadow patterns exhibit a sense of depth as they move, providing a natural spatial three-dimensional visual effect. This design simplifies the structure of this application, reduces production steps, and allows for rapid design-to-sample production, significantly shortening the R&D cycle. Furthermore, it offers relatively low production costs and facilitates large-scale production.

[0033] like Figure 2 As shown, the first micro-texture unit 10 includes closed and continuous closed curve textures 11. It is understood that the closed and continuous closed curve textures 11 give the reflection / refraction of light a fixed range and clear boundaries, enabling the formation of independent light and shadow units and providing a basis for three-dimensionality. Specifically, the closed curves have no breaks; when light shines on them, the difference in reflection / refraction between the inside and outside of the curves forms clearly defined light spots or dark areas. This regionalized light and shadow allows the observer to clearly distinguish the light and shadow ranges of different first micro-texture units 10, avoiding the blurring effect caused by the mutual penetration of light and shadow. When multiple closed curve textures 11 are arranged in an alternating pattern, the regionalized light and shadow of adjacent units will partially overlap, forming a difference in brightness gradient. The binocular parallax of the human eye interprets this brightness gradient as a difference in spatial depth, thereby enhancing the three-dimensional effect. If the curves are not closed (such as broken arcs), the light and shadow will have gaps due to the breaks, failing to form a complete brightness gradient, and the three-dimensionality will be greatly reduced. For example, the closed curve textures 11 are adapted to blocky and dot-matrix preset patterns.

[0034] Optionally, the first micro-texture unit 10 includes an open curve texture 12 with a maximum directional angle variation of not less than 90°. It is understood that the maximum directional angle variation refers to the angle between the curve's extension directions (e.g., the directional angle difference between the horizontal and vertical segments of an L-shaped curve is 90°, and the directional angle difference of a quarter-circle arc is 90°). Curve segments in different directions reflect incident light in completely different directions. For example, when observing an L-shaped curve from the front, the horizontal segment reflects light more strongly (brightly) because it faces the light directly, while the vertical segment reflects light less strongly (darkly) because it faces the light from the side. When the viewing angle is tilted to the right, the vertical segment becomes directly facing the light (bright), and the horizontal segment becomes facing the light from the side (dark). This rapid switching between local brightness and darkness allows the observer to perceive the light and shadow flowing along the curve, creating a dynamic effect far exceeding that of curves with a directional angle variation of less than 90°. Compared to the closed curve texture 11, the light and shadow of the open curve texture 12 are linear or streamlined. When the first micro-texture units 10 are arranged in an alternating manner, the streamlined light and shadow of different curves will connect with each other to form a continuous dynamic light and shadow flow, avoiding the dullness caused by excessive closure. For example, the open curve texture 12 adapts to streamlined, dynamic preset patterns, which can further amplify the light and shadow rotation effect brought about by changes in viewing angle.

[0035] In other words, in this application, both the closed and continuous closed curve texture 11 and the open curve texture 12 with a maximum directional angle change of not less than 90° can avoid light and shadow defects caused by poor curve shapes, ensuring the quality of the visual light and shadow three-dimensional pattern, avoiding clutter, and ensuring the clarity and consistency of the three-dimensional pattern. At the same time, the shape design of both the closed and continuous closed curve texture 11 and the open curve texture 12 with a maximum directional angle change of not less than 90° considers the feasibility of mainstream microfabrication processes such as photolithography, UV transfer, and glass etching, reducing processing difficulty and ensuring compatibility with large-scale mass production. Furthermore, the shape of the curve texture can optimize the stress distribution of the first microtexture unit 10, avoiding structural fragility caused by shape defects, thereby extending the product's service life.

[0036] See you again Figure 2As shown, the closed curve texture 11 includes either a circular ring texture 111 or an elliptical texture 112. The symmetrical shape of the circular ring texture 111 and the elliptical texture 112 determines that their reflection / refraction of light has uniformity and no directional deviation, which is the key to forming clear and stable three-dimensional light and shadow, especially suitable for the core requirements of all-view three-dimensional patterns and dynamic light and shadow flow. Specifically, regardless of whether the observer observes from the front, side, or oblique angle, the light and shadow pattern of the annular bright area + central dark area reflected by the circular ring texture 111 is always consistent. Moreover, there is a height difference between the inner and outer rings of the circular ring texture 111 (such as a raised ring, with the outer ring higher and the inner ring lower). When light shines on it, the outer ring reflects to form a bright ring, and the inner ring forms a dark area. When adjacent circular ring textures 111 are arranged in an alternating manner, the bright ring and the dark area will form a nested ring superposition, thus forming a clear depth difference. The elliptical texture 112 can be adapted to directional light and shadow requirements by adjusting the major or minor axis of the ellipse.

[0037] Furthermore, both the annular texture 111 and the elliptical texture 112 have no complex corners or irregular edges, making their mold preparation simple and ensuring high precision. Both the annular texture 111 and the elliptical texture 112 can be directly designed as a regular, staggered array, integrated into a single processing flow without additional steps, ensuring mass production.

[0038] like Figure 3 , Figures 5 to 8 As shown, the spacing between the geometric centers of any two adjacent first micro-texture units 10 is the same. It can be understood that the geometric center is the core point in a geometric shape that possesses central symmetry or overall balance. For example, the geometric centers of the annular texture 111 and the elliptical texture 112 are the centers of circles. Uniform spacing ensures that the light and shadow units of the first micro-texture units 10 (such as the annular light and shadow of the annular texture 111) are evenly distributed on the surface of the substrate layer 101, without any areas that are too dense or too sparse, directly supporting the formation of a clear and symmetrical three-dimensional pattern. The same spacing between adjacent units means that the light and shadow coverage of each unit matches the spacing, and adjacent light and shadow will form a uniform overlapping area. Simultaneously, this also ensures a consistent three-dimensional effect across the entire area. Furthermore, the same spacing allows for standardized array processing, reducing mold and debugging costs; it also allows the first micro-texture units 10 to be evenly distributed on the surface of the substrate layer 101, without any areas of dense or sparse units, thus improving the durability of the substrate.

[0039] Furthermore, the geometric centers of multiple first microtexture units 10 are arranged to form a predetermined pattern 20. Along the extension direction of the outline of the predetermined pattern 20, the spacing between the geometric centers of every two adjacent first microtexture units 10 increases or decreases sequentially. This arrangement allows the gradient spacing to adapt to the curvature changes of the outline of the predetermined pattern 20 (such as arc-shaped or polygonal outlines), avoiding contour distortion caused by uniform spacing, while optimizing the dynamic lighting effects through spacing variations. Simultaneously, the gradient spacing allows control of lighting density by adjusting the spacing size, thereby guiding the observer's gaze to focus on the key parts of the predetermined pattern 20, thus highlighting the core area of ​​the predetermined pattern 20. It is worth noting that, although the spacing is gradient in this application, it still follows a regular variation along the extension direction of the outline, which reduces customization costs and ensures compatibility with existing array processing logic.

[0040] Understandably, the two spacing settings are complementary, covering different needs and together forming the spacing design system of Microtexture Structure 100. For example, when the customer's requirement is a standardized 3D pattern (such as a general glass decorative texture or a basic anti-counterfeiting pattern), the adjacent spacing is the same to achieve a stable 3D effect with low cost and high mass production efficiency; when the customer's requirement is a customized brand pattern or an irregular 3D effect, the spacing along the outline is gradually varied to achieve a differentiated visual experience with low customization cost and high pattern reproduction.

[0041] like Figure 3 As shown, the distance between the geometric centers of two adjacent first microtexture units 10 is L1, where 0.3mm ≤ L1 ≤ 0.5mm. For example, L1 can be 0.3mm, 0.4mm, 0.5mm, etc. Specifically, the distance L1 directly determines the superposition state of the light and shadow units of the first microtexture unit 10 on the surface of the substrate layer 101. When the distance L1 meets the above range, the degree of light and shadow superposition can be precisely controlled, avoiding blurring or breaks, ensuring the three-dimensional pattern is continuous and natural, and the light and shadow effect is optimal. Simultaneously, when the distance L1 is within the above range, it can meet the requirements of existing mature microfabrication processes, ensuring both distance accuracy and controlling processing costs while providing mass production yield. Furthermore, when the distance L1 is in the range of 0.3mm-0.5mm, it highly matches the visual resolution at the normal viewing distance of the human eye, ensuring that the human eye perceives a continuous three-dimensional pattern, rather than a single microtexture unit. Furthermore, the spacing of 0.3mm-0.5mm allows the first microtexture unit 10 to form a reasonable density of coverage on the surface of the substrate layer 101, which avoids both overly dense units leading to structural fragility and overly sparse units leading to substrate exposure.

[0042] In other words, when the spacing L1 is between 0.3mm and 0.5mm, it can not only allow light and shadow to be evenly superimposed to form a clear three-dimensional pattern, but also achieve mass production through mature technology, while ensuring a natural visual appearance and a durable structure. It is the optimal spacing choice for 100 core application scenarios of micro-texture structures.

[0043] like Figure 4 As shown, the first micro-texture unit 10 has a first linear texture with a line width of D1, where 0.03mm ≤ D1 ≤ 0.05mm. For example, the value of D1 can be 0.03mm, 0.04mm, 0.05mm, etc. It is understood that the value of D1 directly determines the effective reflective / refractory area of ​​the first micro-texture unit 10. If the width is too narrow, the light and shadow will be too dark; if it is too wide, the light and shadow will overlap and become blurred. A range of 0.03mm-0.05mm can precisely control the intensity and boundary of the light and shadow, supporting the clear presentation of the three-dimensional pattern. Simultaneously, when the width of the first micro-texture unit 10 satisfies the above relationship, it can adapt to mainstream micro-machining precision, reducing production difficulty and cost. Furthermore, when the width of the first micro-texture unit 10 satisfies the above relationship, it can match the human eye's resolution threshold for fine structures, allowing the light and shadow to be clearly perceived without appearing rough.

[0044] In other words, this design ensures clear and bright light and shadow, distinct three-dimensional layers, and can be mass-produced using mature technology, while also taking into account both visual refinement and structural durability.

[0045] like Figures 1 to 14 As shown, the geometric centers of multiple first micro-texture units 10 are arranged to form a predetermined pattern 20, which includes a square pattern 21, a linear pattern 22, or a circular pattern 23. This arrangement ensures that the regularity of the geometric patterns of the square pattern 21, linear pattern 22, or circular pattern 23 results in a clear arrangement logic for the first micro-texture units 10, accurately reproducing the three-dimensional outline, avoiding light and shadow distortion, and thus enhancing visual depth. Specifically, the square's equal sides and right angles allow the geometric centers of the first micro-texture units 10 to be evenly / gradually arranged along the four sides and the internal grid, resulting in a three-dimensional light and shadow with symmetrical stability and consistency across all viewing angles. The linear pattern 22, due to its unidirectional extension and lack of or minimal corners, allows the units to be evenly / gradually arranged along the straight line, resulting in a three-dimensional light and shadow with linear continuity and dynamic guidance. The circular pattern 23, due to its central symmetry and lack of directionality, allows the units to be evenly / gradually arranged along the circumference and radial direction, resulting in a three-dimensional light and shadow with uniformity across all viewing angles and a continuous, immersive feel.

[0046] Furthermore, the three predetermined patterns 20 can simplify the process, reduce production difficulty, and enable mass production. Squares, straight lines, and circles are the most basic and easily recognizable geometric shapes in human visual perception; their three-dimensional light and shadow can be quickly perceived without complex interpretation, making them suitable for mass consumer scenarios. Simultaneously, the characteristics of the three patterns can precisely match the core application scenarios of the micro-texture structure 100, allowing for rapid production without developing new processes. Of course, in other embodiments of this application, the predetermined pattern 20 can also be patterns of other shapes, with an adaptive selection based on actual production needs.

[0047] like Figures 3 to 8 As shown, the predetermined pattern 20 includes a square pattern 21 with a side length of L. The first micro-texture unit 10 includes circular textures 111, each with a radius of d, where L / 2 ≤ d ≤ L. Specifically, as... Figure 3 As shown, this application designs N preset points, which form corresponding preset patterns. The N preset points constitute a preset square pattern 21 with a side length of L. Each preset point corresponds to a micro-texture grating, which can be located at the center of the micro-texture grating or at other fixed relative positions. The differences in reflected light from each micro-texture grating at different viewing angles, as well as the binocular parallax and motion parallax characteristics of the human visual system, are utilized. Based on the fact that the micro-texture grating corresponding to each preset point is a circular grating, the observer can see two simultaneously existing square patterns 21 with a side length of L and a relative distance of d from different viewing angles, creating a dynamic light and shadow effect. Visually, the two square patterns have a relative depth difference, as if one is on top and the other on the bottom, forming a spatial three-dimensional depth of field. Simultaneously, the light and shadow of the two square patterns 21 flow in the same direction in a ring, achieving a large-scale dynamic flow effect.

[0048] Understandably, the radius d of the circular texture 111 directly determines its light and shadow coverage. When the above range is met, the light and shadow can precisely cover the key areas of the square pattern 21, ensuring that the three-dimensional light and shadow fully serve the presentation of the square pattern 21 without waste or omission, thus enhancing the clarity of the boundaries. If d < L / 2, it may lead to scattered light and shadow and blurred three-dimensional outlines; if d > L, it may result in light and shadow overflow and a chaotic pattern. When the range of L / 2 ≤ d ≤ L is met, the density and distribution of the circular light and shadow within the square pattern 21 are moderate and balanced, avoiding excessive density or sparseness in some areas, which conforms to the human eye's cognitive expectation of the symmetrical shape of a square and improves visual comfort; it also allows the circular texture 111 to be evenly distributed within the square pattern 21, avoiding local unit density or sparseness that leads to stress concentration in the substrate layer 101 and extends the product's service life.

[0049] like Figure 14As shown, the first microtexture unit 10 includes a circular texture 111, and the predetermined pattern 20 includes a linear pattern 22. Along the extension direction of the linear pattern 22, the radius of the circular texture 111 increases or decreases sequentially. It can be understood that the radius of the circular texture 111 directly determines its light and shadow coverage. A gradual change in radius along the linear direction creates a size / brightness gradient in the light and shadow along the line, injecting three-dimensional depth into the linear pattern 22, rather than a planar light and shadow with a fixed radius. Simultaneously, the gradual change in radius along the line not only brings static depth but also creates a dynamic rhythm when the viewing angle changes. Furthermore, it guides the eye through changes in the size of the light and shadow, solving the visual fatigue associated with a fixed radius. Moreover, the gradual change in radius along the line is a quantifiable, regular change that can be achieved simply by setting parameters without breaking through existing microfabrication processes, balancing customized effects with mass production stability.

[0050] like Figure 10 As shown, the predetermined pattern 20 includes a square pattern 21. The substrate layer 101 is also provided with multiple second micro-texture units 30 of similar shapes. The geometric centers of the multiple second micro-texture units 30 overlap and are located at the four vertices of the square pattern 21. This arrangement, with the second micro-texture units 30 overlapping at their vertex geometric centers (multiple units focusing on the same point), forms dense vertex light and shadow spots, avoiding contour distortion and improving the integrity of the three-dimensional contour; it can also focus the visual focus, reduce recognition costs, and enhance pattern recognition. In this embodiment, the preset points at the four vertices of the square pattern 21 are special preset points, no longer corresponding to a single annular micro-texture grating, but rather corresponding to... Figure 9 The annular textured raster group shown. This results in, as... Figure 10 The micro-texture structure 100 shown. At each specific preset point, the annular texture raster group forms a linear light and shadow, connecting the corresponding vertices of two preset square light and shadows, thus forming a more spatially three-dimensional cubic light and shadow. Furthermore, the cubic light and shadow rotates and flows in a ring shape as the viewing angle changes, creating a highly dynamic effect, such as... Figures 11 to 13 As shown, this can be understood as follows: at any preset point, corresponding to the corresponding grating group, a linear light and shadow connection can be formed to link the light and shadow at the preset point.

[0051] like Figure 9As shown, the second micro-texture unit 30 includes a circular texture unit 31. It can be understood that the second micro-texture unit 30 (located at the four vertices of the square pattern 21, with multiple units coinciding at their centers) is chosen to be a circular texture unit 31. The core reason is that the circular shape's characteristics of "central symmetry, lack of sharp edges, uniform lighting and shadow, and ease of fabrication" perfectly match the core requirements of "vertex anchoring, stress dispersion, and visual refinement"—avoiding the lighting distortion and stress accumulation problems of units with sharp edges (such as squares and triangles), while also enhancing the functional value of the second micro-texture unit 30 at the vertices. Specifically, from a functional perspective: vertices need uniform lighting and shadow to anchor the contours and to disperse stress concentration and impact; the circular shape's central symmetry and lack of sharp edges perfectly satisfy these requirements. From a fabrication perspective: the second micro-texture unit 30 requires multiple units to coincide and a parametric design; the circular shape's minimalist parameters and ease of fabrication significantly reduce costs. From a visual perspective: vertices need to highlight the focal point without being abrupt; the roundness of the circle contrasts with the right angles of the square, creating a look that is both focused and refined.

[0052] like Figure 9 As shown, the spacing between two adjacent second microtexture units 30 is L2, where 0.3mm ≤ L2 ≤ 0.5mm. For example, L2 can be 0.3mm, 0.4mm, 0.5mm, etc. When the spacing L2 between two adjacent second microtexture units 30 meets the above range, it can avoid light and shadow breaks, forming a closed-loop three-dimensional contour; it can also ensure a unified light and shadow style, avoid visual fragmentation, and strengthen the right-angled features of the square, avoiding contour distortion. When the spacing L2 is within the above range, it can meet the requirements of existing mature microfabrication processes, ensuring spacing accuracy while controlling processing costs and providing mass production yield. Furthermore, when the spacing L2 is in the range of 0.3mm-0.5mm, it highly matches the visual resolution at the normal viewing distance of the human eye, ensuring that the human eye perceives a continuous three-dimensional pattern, rather than a single microtexture unit. Moreover, a spacing of 0.3mm-0.5mm allows the second microtexture units 30 to form a reasonable density of coverage on the surface of the substrate layer 101, avoiding both overly dense units leading to structural fragility and overly sparse units leading to substrate exposure.

[0053] See you again Figure 9As shown, the second micro-texture unit 30 has a second linear texture with a line width of D2, where 0.03mm ≤ D2 ≤ 0.05mm. For example, the value of D2 can be 0.03mm, 0.04mm, 0.05mm, etc. It is understood that the value of D2 directly determines the effective reflective / refractory area of ​​the second micro-texture unit 30. If the width is too narrow, the light and shadow will be too dark; if it is too wide, the light and shadow will overlap and become blurred. A range of 0.03mm-0.05mm can precisely control the intensity and boundary of the light and shadow, supporting the clear presentation of the three-dimensional pattern. Simultaneously, when the width of the second micro-texture unit 30 satisfies the above relationship, it can adapt to mainstream micro-machining precision, reducing production difficulty and cost. Furthermore, when the width of the second micro-texture unit 30 satisfies the above relationship, it can match the human eye's resolution threshold for fine structures, allowing the light and shadow to be clearly perceived without appearing rough.

[0054] Furthermore, the substrate layer 101 includes either a PET layer (polyethylene terephthalate layer) or a glass layer. Both the PET layer and the glass layer have high light transmittance, ensuring clear visibility of light and shadow. Simultaneously, the surface roughness of the glass layer and the PET layer (especially optical grade) is typically ≤0.1μm, enabling precise replication of the fine structure of microtextures and avoiding light and shadow distortion of the microtextures. Moreover, the structural characteristics of the PET layer and the glass layer are complementary, respectively suitable for "rigid and durable scenarios" and "flexible / lightweight scenarios," while simultaneously meeting the stress dispersion and damage protection requirements of the microtexture units; they are also compatible with the fine processing of microtextures, achieving high-precision texture replication. The cost and processing difficulty of the two substrates are graded, covering different markets from high-end precision to mass consumer, avoiding the problem of excessively high cost or insufficient performance of a single substrate.

[0055] Specifically, in terms of performance: the glass layer meets the requirements of high hardness, high light transmittance, and durability, while the PET layer meets the requirements of flexibility, lightness, and low cost, respectively suitable for rigid and flexible scenarios; in terms of process: the glass layer is suitable for high-precision etching / photolithography, while the PET layer is suitable for efficient UV transfer / molding, respectively meeting the needs of precision and mass production.

[0056] For example, the microtexture structure 100 of this application can be prepared in the following two ways to obtain the product.

[0057] The first method involves the fabrication of film-textured products: After completing the microtexture structure design, the corresponding product is fabricated using photolithography. Specifically, a photolithography machine is used to directly write the microtexture onto a glass substrate coated with photoresist (i.e., the photomask), resulting in a photomask with the corresponding microtexture structure. The photomask then undergoes development, cleaning, and drying processes to form a microtextured mold suitable for production. This microtexture is then transferred to a PET explosion-proof film via UV transfer, creating a film product with a microtexture structure. Subsequent processes, including coating, printing, cutting, and positioning, are then applied to the glass to create a glass product. Alternatively, the microtexture structure can be transferred to a composite material and thermoformed to create a textured plastic sheet.

[0058] The second method involves preparing glass samples: photoresist is uniformly applied to the glass product, and the designed texture structure is created through exposure and development. The product is then placed in a chemical etching bath. Due to the protective effect of the photoresist on the glass, areas with thicker photoresist have a longer etching time, while areas with thinner photoresist have a shorter etching time, allowing the base glass layer to be exposed before the thicker areas. Therefore, the texture structure with unevenness placed in the etching bath is completely replicated onto the glass through a reasonable etching time, forming micro-textured lithium with the structure of this application, thus forming the glass product.

[0059] According to a second aspect of this application, a device is provided, such as a mobile phone, vehicle, or other similar device. This device includes the aforementioned microtexture structure 100. Therefore, this device incorporates all the technical effects of the microtexture structure 100 in the above embodiments. Since all the technical effects of the microtexture structure 100 have been described in detail above, they will not be repeated here.

[0060] As can be seen from the above embodiments, the microtexture structure 100 and device of this application have at least the following technical effects: This application provides a plurality of first microtexture units 10 with the same or similar shapes on the surface of the substrate layer 101. The plurality of first microtexture units 10 are arranged in an alternating manner and are used to form a three-dimensional visual light and shadow pattern. That is, a spatial three-dimensional dynamic effect is achieved through a single-layer microtexture structure. This single-layer microtexture structure is relatively simple, easy to design, and allows for the development of a large number of different light and shadow effects in a short time.

[0061] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0062] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0063] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A micro-textured structure (100) characterized in that, include: The substrate layer (101) has a plurality of first micro-texture units (10) with the same or similar shapes on its surface. The plurality of first micro-texture units (10) are arranged in an alternating manner and are used to form a visual light and shadow three-dimensional pattern.

2. The microtexture (100) of claim 1, wherein, The first microtexture unit (10) includes a closed and continuous closed curve texture (11); or, The first microtexture unit (10) includes an open curve texture (12) with a maximum orientation angle variation of not less than 90°.

3. The microtexture structure (100) according to claim 2, characterized in that, The closed curve texture (11) includes a circular texture (111) or an elliptical texture (112).

4. The microtexture structure (100) according to claim 1, characterized in that, The spacing between the geometric centers of any two adjacent first microtexture units (10) is the same; or, The geometric centers of a plurality of first microtexture units (10) are arranged to form a predetermined pattern (20). Along the extension direction of the outline of the predetermined pattern (20), the distance between the geometric centers of each two adjacent first microtexture units (10) increases or decreases sequentially.

5. The microtexture structure (100) according to claim 1, characterized in that, The distance between the geometric centers of two adjacent first microtexture units (10) is L1, where 0.3mm≤L1≤0.5mm.

6. The microtexture structure (100) according to claim 1, characterized in that, The first microtexture unit (10) has a first linear texture, the line width of which is D1, wherein 0.03mm≤D1≤0.05mm.

7. The microtexture structure (100) according to claim 1, characterized in that, The geometric centers of a plurality of the first microtexture units (10) are arranged to form a predetermined pattern (20), the predetermined pattern (20) including a square pattern (21), a linear pattern (22) or a circular pattern (23).

8. The microtexture structure (100) according to claim 7, characterized in that, The predetermined pattern (20) includes the square pattern (21), the side length of the square pattern (21) is L, and the first micro-texture unit (10) includes a circular texture (111), the radius of each circular texture (111) is d, where L / 2≤d≤L.

9. The microtexture structure (100) according to claim 7, characterized in that, The first microtexture unit (10) includes a circular texture (111), and the predetermined pattern (20) includes the straight pattern (22). Along the extension direction of the straight pattern (22), the radius of the circular texture (111) increases or decreases sequentially.

10. The microtexture structure (100) according to claim 7, characterized in that, The predetermined pattern (20) includes the square pattern (21), and the substrate layer (101) is further provided with a plurality of second microtexture units (30) with similar shapes. The geometric centers of the plurality of second microtexture units (30) overlap and are located at the four vertices of the square pattern (21).

11. The microtexture structure (100) according to claim 10, characterized in that, The second microtexture unit (30) includes a circular texture unit (31).

12. The microtexture structure (100) according to claim 10, characterized in that, The spacing between two adjacent second microtexture units (30) is L2, where 0.3mm≤L2≤0.5mm.

13. The microtexture structure (100) according to claim 10, characterized in that, The second microtexture unit (30) has a second linear texture, the line width of which is D2, wherein 0.03mm≤D2≤0.05mm.

14. The microtextured structure (100) according to any one of claims 1 to 13, characterized in that, The substrate layer (101) includes a PET layer or a glass layer.

15. A device, characterized in that, The device includes the microtexture structure (100) according to any one of claims 1 to 14.

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