Decorated substrate, method for manufacturing and use thereof

Abstract

The application provides a decorative substrate and a preparation method and application thereof. The decorative substrate comprises a substrate and a texture layer arranged on the surface of the substrate. The texture layer is provided with a plurality of grating grids on the side surface away from the substrate. At least the plurality of grating grids comprises a plurality of grating units arranged in a ring shape around a center point. The grating unit comprises a plurality of strip-shaped protrusions arranged in sequence in the radius direction of a circle with the center point as the center. In the grating grid, the strip-shaped protrusion comprises a first surface close to the center point and a second surface away from the center point. The first surface and the second surface are connected with the bottom surface of the strip-shaped protrusion. The included angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the included angle between the second surface and the bottom surface of the strip-shaped protrusion. The decorative substrate can realize a three-dimensional weaving grid pattern effect similar to cloth through the texture layer with a specific structure, thereby presenting a good decorative effect.

Description

Technical Field

[0001] This application relates to the field of decorative technology, specifically to a decorative substrate, its preparation method, and its application. Background Technology

[0002] Currently, the texture and color of electronic device casing components such as mobile phone back covers are typically achieved through decorative layers applied to the surface of the cover. However, the appearance of decorative covers on the market is relatively monotonous and cannot meet people's personalized needs, resulting in weak product competitiveness. Therefore, it is necessary to provide a new type of decorative cover with a novel appearance and its manufacturing method to meet people's diverse needs for the appearance of electronic devices. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a decorative substrate that, through a textured layer with a specific structure, can achieve a three-dimensional woven grid effect similar to fabric, thereby presenting a superior decorative effect.

[0004] The first aspect of this application provides a decorative substrate, the decorative substrate including a substrate and a texture layer disposed on the surface of the substrate, the texture layer having a plurality of gratings on a side of its surface away from the substrate; at least a plurality of the gratings including a plurality of grating units arranged in a ring around a center point, the grating units including a plurality of strip-shaped protrusions, the plurality of strip-shaped protrusions being arranged sequentially in the radial direction of a circle centered at the center point;

[0005] In the grating, the strip-shaped protrusion includes a first surface near the center point and a second surface away from the center point. The first surface and the second surface are in contact with the bottom surface of the strip-shaped protrusion. The angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion.

[0006] In the texture layer of this application, the strip-shaped protrusions with specific structure and arrangement in the grating unit can deflect the reflected light on the protruding surface towards the center point of the grating grid. The multiple grating units arranged in a ring ensure that the reflection path of light in different grating units can be concentrated at the center point of the grating grid. By converging the reflected light at the center point of the grating grid, a protrusion effect with a bright central area and a dark edge area can be achieved. Macroscopically, the decorative substrate presents a three-dimensional woven grid pattern, which greatly enhances the decorative effect.

[0007] Optionally, in the grating, adjacent grating units have a common edge, and multiple grating units intersect at the center point.

[0008] Optionally, in the grating, there is a gap between adjacent grating units, and the distance from the grating unit to the center point is less than or equal to 100 μm.

[0009] Optionally, in the grating, there is a gap between adjacent grating units, and the distance from the grating unit to the center point is less than or equal to 1 / 5 of the diameter of the circumcircle of the grating.

[0010] Optionally, in the texture layer, adjacent raster grids are mirror-symmetrical along the axis of symmetry; the distance from the raster grid to the axis of symmetry is less than or equal to 1 / 10 of the diameter of the circumcircle of the raster grid, or the distance from the raster grid to the axis of symmetry is less than or equal to 50 μm.

[0011] Optionally, the angle between the first surface and the bottom surface of the strip-shaped protrusion is 11° to 40°.

[0012] Optionally, the angle between the second surface and the bottom surface of the strip-shaped protrusion is 80° to 100°.

[0013] Optionally, in the grating, adjacent grating units are mirror-symmetrical along the axis of symmetry, and the angle between the extension direction of each strip protrusion and the axis of symmetry is 20° to 70°.

[0014] Optionally, the ratio of the height of the strip-shaped protrusion to the width of the bottom surface of the strip-shaped protrusion is 0.05 to 0.4.

[0015] Optionally, in the grating unit, in a direction centered on the center point and away from the center point, the aspect ratio of the plurality of strip-shaped protrusions gradually decreases, and the aspect ratio is the ratio of the height of the strip-shaped protrusion to the width of the bottom surface of the strip-shaped protrusion.

[0016] Optionally, in the grating unit, the aspect ratio difference between adjacent strip-shaped protrusions is less than or equal to 0.1.

[0017] Optionally, the height of the strip-shaped protrusion is 0.1 μm to 20 μm.

[0018] Optionally, the width of the bottom surface of the strip-shaped protrusion is 1μm to 150μm.

[0019] Optionally, the longest strip-shaped protrusion in the grating unit has a length of 100μm to 3000μm in its extension direction.

[0020] Optionally, the truncated shape of the strip-shaped protrusion in the first direction includes one or more of a straight segment and an arc segment; the first direction is perpendicular to both the substrate and the extension direction of the strip-shaped protrusion.

[0021] Optionally, the shape of the strip-shaped protrusion in its extending direction includes one or more of the following: saddle-shaped, serrated, and arc-shaped.

[0022] Optionally, the decorative substrate further includes a finishing layer, which includes one or more of a color layer, a frosted layer, and a glitter layer, and the finishing layer is disposed on the surface of the texture layer and / or the substrate.

[0023] A second aspect of this application provides a method for preparing a decorative substrate, comprising the following steps:

[0024] A textured layer is formed on the surface of a substrate to obtain the decorative substrate. The method for preparing the textured layer includes one or more of transfer printing, etching, and hot pressing. The textured layer has a plurality of gratings on the side of the surface away from the substrate. At least a plurality of the gratings include a plurality of grating units arranged in a ring around a center point. The grating units include a plurality of strip-shaped protrusions, and the plurality of strip-shaped protrusions are arranged sequentially in the radial direction of a circle centered on the center point.

[0025] In the grating, the strip-shaped protrusion includes a first surface near the center point and a second surface away from the center point. The first surface and the second surface are in contact with the bottom surface of the strip-shaped protrusion. The angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion.

[0026] The preparation method provided in this application is simple and easy to operate, the process is mature, and it is convenient for industrial production.

[0027] A third aspect of this application provides a cover plate comprising a decorative substrate and a base as described in the first aspect, the decorative substrate being disposed on the surface of the base plate.

[0028] A fourth aspect of this application provides an electronic device comprising a cover as described in the third aspect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a decorative substrate provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a texture layer provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a texture layer provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0034] Figure 6This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0037] Figure 9 A schematic diagram of the arrangement of strip-shaped protrusions in a grating provided in an embodiment of this application;

[0038] Figure 10 A schematic diagram of the principle of a grating provided in an embodiment of this application;

[0039] Figure 11 A cross-sectional schematic diagram of different strip-shaped protrusions provided in an embodiment of this application;

[0040] Figure 12 This is a schematic diagram of the structure of a strip-shaped protrusion provided in an embodiment of this application;

[0041] Figure 13 This is a schematic diagram illustrating the principle of light reflection provided in an embodiment of this application. Figure 13 (a) is a top view of the strip-shaped protrusions. Figure 13 (b) is a cross-sectional view of the strip-shaped protrusion at point AA;

[0042] Figure 14 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0043] Figure 15 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0044] Figure 16 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0045] Figure 17 This is a schematic diagram of the structure of a grating provided in an embodiment of this application;

[0046] Figure 18 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0047] Figure 19 This is a top view of the decorative substrate provided in Embodiment 1 of this application;

[0048] Figure 20 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 1 of this application;

[0049] Figure 21 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 1 of this application;

[0050] Figure 22 This is a top view of the decorative substrate provided in Embodiment 2 of this application;

[0051] Figure 23 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 2 of this application;

[0052] Figure 24 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 2 of this application;

[0053] Figure 25 This is a top view of the decorative substrate provided in Embodiment 3 of this application;

[0054] Figure 26 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 3 of this application;

[0055] Figure 27 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 3 of this application;

[0056] Figure 28 This is a top view of the decorative substrate provided in Embodiment 4 of this application;

[0057] Figure 29 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 4 of this application;

[0058] Figure 30 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 4 of this application. Detailed Implementation

[0059] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a decorative substrate provided in one embodiment of this application. The decorative substrate includes a substrate 20 and a textured layer 10 disposed on the surface of the substrate 20. The substrate includes one or more of plastic, metal, ceramic, and glass. In this embodiment, the surface of the textured layer is provided with multiple gratings, which can be arranged continuously or intermittently. Please refer to [link / reference]. Figure 2 , Figure 2 This is a schematic diagram of the structure of a texture layer provided in an embodiment of this application. The surface of the texture layer 10 is provided with a plurality of continuously arranged gratings 11. Please refer to... Figure 3 , Figure 3 This is a schematic diagram of the structure of a texture layer provided in one embodiment of this application. The surface of the texture layer 10 is provided with a plurality of spaced-apart gratings 11. In some embodiments of this application, the plurality of gratings are arranged at intervals, and adjacent gratings are mirror-symmetrical along an axis of symmetry. The distance from a grating to the axis of symmetry is less than or equal to 1 / 10 of the diameter of the circumcircle of the grating, and the distance from a grating to the axis of symmetry is less than or equal to 50 μm. Here, the distance from a grating to the axis of symmetry refers to the distance from the point in the grating closest to the axis of symmetry to the axis of symmetry.

[0061] In this embodiment, the grating grid includes multiple grating units arranged in a ring around a central point. Each grating unit includes multiple strip-shaped protrusions, which are arranged sequentially along the radius of a circle centered at the central point. It should be noted that the ring arrangement of the grating units refers to the overall arrangement of the grating units, not the arrangement of the strip-shaped protrusions within the grating units. Furthermore, the extending directions of the multiple strip-shaped protrusions can be parallel or non-parallel. In some embodiments of this application, the grating grid includes multiple grating units arranged in a ring around a central point and spliced ​​together; that is, adjacent grating units share a common edge, and the multiple grating units intersect at the central point. Please refer to [link to relevant documentation]. Figure 4 , Figure 4 This is a schematic diagram of a grating structure provided in one embodiment of this application. The grating is quadrilateral in shape and includes four grating units arranged in a ring around a central point and spliced ​​together. Each grating unit is quadrilateral in shape and includes several parallel strip-shaped protrusions 13 extending from each other. Please refer to... Figure 5 , Figure 5 This is a schematic diagram of a grating structure provided in one embodiment of this application. The grating is triangular in shape and includes three grating units arranged in a ring around a central point and spliced ​​together. Each grating unit is triangular in shape and includes several parallel strip-shaped protrusions 13 extending from each other. Please refer to [link to relevant documentation]. Figure 6 , Figure 6 This is a schematic diagram of the structure of a grating provided in an embodiment of the present application. The grating is pentagonal in shape and includes five grating units arranged in a ring around the center point and spliced ​​together. The grating units are triangular in shape and include several strip-shaped protrusions 13 with parallel extension directions.

[0062] In some embodiments of this application, there is a gap between adjacent grating units in the grating grid. (See also...) Figure 7 , Figure 7 This is a schematic diagram of the structure of a grating provided in an embodiment of this application. Figure 7 In a medium grating grid, adjacent grating cells are arranged with spacing between them. The distance d0 from each grating cell to the center point is the distance from the closest point within that grating cell to the center point. (See also...) Figure 8 , Figure 8This is a schematic diagram of the structure of a grating provided in an embodiment of this application. Figure 8 In the raster grid, adjacent raster units are arranged at intervals, and the shape of the raster units is triangular. In some embodiments of this application, the distance from the raster unit to the center point is less than or equal to 100 μm. In some embodiments of this application, the distance from the raster unit to the center point is less than or equal to 1 / 5 of the diameter of the circumcircle of the raster grid. Controlling the spacing between the raster units can ensure that the texture layer as a whole has a more significant woven grid effect.

[0063] In this embodiment, the strip-shaped protrusion includes a first surface near the center point and a second surface away from the center point. The first and second surfaces are in contact with the bottom surface of the strip-shaped protrusion, and the angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion. The bottom surface of the strip-shaped protrusion refers to the surface of the strip-shaped protrusion closest to the substrate, and the bottom surface of the strip-shaped protrusion is parallel to the substrate. Please refer to [link / reference]. Figure 9 , Figure 9 This is a schematic diagram of the arrangement of strip-shaped protrusions in a grating according to an embodiment of this application. Figure 9 (a) shows the arrangement direction of the strip-shaped protrusions. Figure 9 Figure (b) shows a cross-sectional view of the strip-shaped protrusions. Specifically, in Figure (a), multiple strip-shaped protrusions are cut off along the plane containing line ab to obtain the cross-sectional view of multiple strip-shaped protrusions in Figure (b). The strip-shaped protrusion 13 has a first surface near the center point and a second surface away from the center point. The angle between the first surface and the bottom surface of the strip-shaped protrusion is α, and the angle between the second surface and the bottom surface of the strip-shaped protrusion is β, where α ≤ β. The fact that the angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion ensures that the light reflected from the surface of the strip-shaped protrusion can converge to the center point of the grating, and under this condition, α < 90°. Please refer to [link / reference]. Figure 10 , Figure 10 This is a schematic diagram of the principle of a grating provided in an embodiment of this application. When incident light shines on the strip-shaped raised surface, since the strip-shaped raised surfaces are arranged around the center point and the angle between the surface of the strip-shaped raised surface near the center point and the bottom surface is less than or equal to the angle between the second surface and the bottom surface, the reflection path of the incident light can be shifted towards the center of the grating. The reflected light from multiple strip-shaped raised surfaces converges at the center of the grating, so the brightness at the center of the grating is significantly higher than the brightness at the outer edge. Furthermore, the brightness gradually decreases in the direction of the radius of the circle centered on the center point, thus presenting the effect of a raised grid.

[0064] In some embodiments of this application, the angle between the first surface and the bottom surface of the strip-shaped protrusion is 11° to 40°, i.e., 11° ≤ α ≤ 40°. The angle between the first surface and the bottom surface of the strip-shaped protrusion can specifically be, but is not limited to, 11°, 15°, 18°, 20°, 25°, 30°, 35°, or 40°. In some embodiments of this application, the angle between the second surface and the bottom surface of the strip-shaped protrusion is 80° to 100°, i.e., 80° ≤ β ≤ 100°. The angle between the second surface and the bottom surface of the strip-shaped protrusion can specifically be, but is not limited to, 80°, 85°, 90°, 95°, or 100°. Controlling the angle between the first surface and the bottom surface of the strip-shaped protrusion, and the angle between the second surface and the bottom surface of the strip-shaped protrusion, helps to concentrate the light reflected from the strip-shaped protrusion to the center of the grating, thereby improving the three-dimensional effect of the woven grid.

[0065] In this application, the first direction, the second direction, and the extension direction of the strip-shaped protrusion are perpendicular to each other. The second direction and the extension direction of the strip-shaped protrusion are parallel to the substrate, and the first direction is perpendicular to the substrate. In the embodiments of this application, the shape of the cut on the strip-shaped protrusion perpendicular to its extension direction includes one or more of a straight line segment and an arc segment. The arc segment includes an upwardly convex arc segment and a downwardly convex arc segment. This cut shape can be understood as cutting the strip-shaped protrusion with a plane that is perpendicular to both the extension direction of the strip-shaped protrusion and the direction perpendicular to the substrate to obtain the cross-section of the strip-shaped protrusion. The intersection of the outer surface of the strip-shaped protrusion and the plane is the cut. Please refer to [link to relevant documentation]. Figure 11 , Figure 11 This is a cross-sectional schematic diagram of different strip-shaped protrusions provided in one embodiment of this application. The cross-sections of the strip-shaped protrusions include triangles, trapezoids, fan shapes, or irregular shapes. The cut-off lines of the strip-shaped protrusions with triangular and trapezoidal cross-sections are straight segments; the cut-off lines of the strip-shaped protrusions with fan-shaped cross-sections are arc segments; the cut-off lines of the strip-shaped protrusions with irregular shape 1 have straight segments and upward-convex arc segments; and the cut-off lines of the strip-shaped protrusions with irregular shape 2 have straight segments and downward-convex arc segments. In some embodiments of this application, the line connecting the vertices of the strip-shaped protrusions at different cut-off points is used as the dividing line between the first surface and the second surface, wherein the vertex of the strip-shaped protrusion refers to the highest point of the strip-shaped protrusion relative to the bottom surface of the protrusion in the first direction. In some embodiments of this application, the first surface of the strip-shaped protrusion is an upward-convex arc surface, and its cross-sectional schematic diagram is shown below. Figure 11 The irregular shape 1, i.e., the cross-section of the strip-shaped protrusion with the cut near the center point being an upwardly convex arc segment, results in a strip-shaped protrusion that reflects light more diffusely than a planar strip-shaped protrusion, producing a softer weaving effect. In some embodiments of this application, the first surface of the strip-shaped protrusion is a downwardly convex arc surface, as shown in the cross-sectional schematic diagram. Figure 11 The irregular shape 2, that is, the truncated section of the strip-shaped protrusion with the truncated arc segment on the side near the center point, has a more concentrated light reflection than the strip-shaped protrusion of the planar structure. The brightness at the center of the grating is higher, and the woven effect is sharper and clearer, with a better three-dimensional effect.

[0066] In this application, the height of the strip-shaped protrusion refers to the height difference between the highest point of the strip-shaped protrusion relative to its bottom surface and the bottom surface itself; the width of the strip-shaped protrusion refers to its maximum width in the second direction. Please refer to [link / reference needed]. Figure 12 , Figure 12 This is a schematic diagram of a strip-shaped protrusion provided in one embodiment of this application. The length of the bottom edge of the cross-section of the strip-shaped protrusion is the width d1 of the protrusion. The distance from the highest point of the cross-section to the bottom surface of the protrusion is the height h of the protrusion, which can also be calculated from the height difference between the highest and lowest points of the cut. In some embodiments of this application, the height of the strip-shaped protrusion is 0.1 μm to 20 μm, and the specific height can be, but is not limited to, 0.1 μm, 0.5 μm, 1 μm, 3 μm, 5 μm, 10 μm, 15 μm, or 20 μm. In some embodiments of this application, the height of the strip-shaped protrusion is 1 μm to 20 μm. In some embodiments of this application, the width of the strip-shaped protrusions is 1 μm to 150 μm. The specific width of the strip-shaped protrusions can be, but is not limited to, 1 μm, 5 μm, 10 μm, 30 μm, 50 μm, 65 μm, 80 μm, 100 μm, 120 μm, or 150 μm. In some embodiments, the width of the strip-shaped protrusions is less than or equal to 5 μm. Smaller widths of the strip-shaped protrusions promote light scattering, thus giving the grating a dazzling effect. In some embodiments, the width of the strip-shaped protrusions is 30 μm to 100 μm. Strip-shaped protrusions of this width have a more pronounced light reflection effect, which is more conducive to improving the three-dimensional effect of the woven grid.

[0067] In some embodiments of this application, the ratio of the height of the strip-shaped protrusion to the width of its base is 0.05 to 0.4. Specifically, but not limited to, the ratio can be 0.05, 0.1, 0.2, 0.3, or 0.4. The aspect ratio of the strip-shaped protrusion affects the angle of reflected light, thus affecting the intensity of the light and shadow effect. Please refer to [link to relevant documentation]. Figure 13 , Figure 13 This is a schematic diagram illustrating the principle of light reflection provided in an embodiment of this application. Figure 13 (a) is a top view of the strip-shaped protrusions. Figure 13 (b) is a cross-sectional view of the strip-shaped protrusion at point AA. Figure 13 In Figure (b), the incident light path is darker in color, while the reflected light path is lighter in color. Under the same incident light conditions, the aspect ratio of the cross section affects the amount of light reflected to the human eye. When the width of the bottom surface of the strip protrusion is the same, the smaller the height of the strip protrusion, the less light is reflected to the human eye. When the height of the strip protrusion is the same, the larger the width of the bottom surface of the strip protrusion, the less light is reflected to the human eye. In summary, the larger the ratio of the height of the strip protrusion to the width of the bottom surface of the strip protrusion, the more light is reflected to the human eye, the brighter the light and shadow effect, and the more significant the weaving effect.

[0068] In some embodiments of this application, in the grating unit, the aspect ratio of multiple strip-shaped protrusions gradually decreases in a direction away from the center point. The larger the aspect ratio of the strip-shaped protrusions, the brighter the reflected light. This gradual change in aspect ratio can further enhance the contrast between the center and the edge of the grating, thereby strengthening the three-dimensional effect of the grating. In some embodiments of this application, the aspect ratio difference between adjacent strip-shaped protrusions in the grating unit is less than or equal to 0.1. Controlling the aspect ratio difference between adjacent strip-shaped protrusions can make the brightness gradient more natural and the woven grid effect more vivid.

[0069] In some embodiments of this application, the size of the grating is 100μm to 3000μm. The size of the grating refers to the length of the longest strip-shaped protrusion in the grating unit along its extension direction. The length of the longest strip-shaped protrusion in the grating unit along its extension direction can specifically be, but is not limited to, 100μm, 200μm, 400μm, 600μm, 800μm, 1000μm, 1500μm, 2000μm, 2500μm, or 3000μm. Please refer to [link to relevant documentation]. Figures 4-6 , Figures 4-6 In the grating unit, the length of the longest extended strip-shaped protrusion in its extending direction is d. In some embodiments, the size of the grating is less than or equal to 150 μm, and the woven grid effect of the decorative substrate is faintly visible. In some embodiments, the size of the grating is greater than 150 μm, and the woven grid effect of the decorative substrate is more clearly visible. In some embodiments of this application, the length of the longest extended strip-shaped protrusion in the grating unit in its extending direction is 200 μm to 500 μm, and the woven grid three-dimensional effect of the grating at this size is more obvious and the texture is more delicate.

[0070] In some embodiments of this application, adjacent grating units in the grating are mirror-symmetrical along an axis of symmetry, and the angle between the extending direction of each strip-shaped protrusion and the axis of symmetry is 20° to 70°. See also... Figure 7 The angle between the extending direction of the strip-shaped protrusion and the axis of symmetry is γ. In some embodiments of this application, adjacent grating units in the grating grid have a common edge; a schematic diagram of the position of the common edge can be found in [reference needed]. Figures 4-6In this design, the angle between the extension direction of the strip-shaped protrusion and the common side or axis of symmetry is γ. The angle between the extension direction of the strip-shaped protrusion and the common side or axis of symmetry can be, but is not limited to, 20°, 30°, 50°, 60°, or 70°. The extension direction of the strip-shaped protrusion also affects the angle of the reflected light, thus affecting the intensity of the light and shadow effect. When the angle between the extension direction of the strip-shaped protrusion and the axis of symmetry is controlled to be between 20° and 70°, the light reflected by the strip-shaped protrusions in different grating units can be more concentrated, thereby increasing the brightness of the grating center. In some embodiments of this application, the angle between the extension direction of the strip-shaped protrusion and the axis of symmetry is between 30° and 60°. Within this angle range, the grating light and shadow contrast is high, and the three-dimensional effect of the woven grid is stronger.

[0071] In some embodiments of this application, the shape of the strip-shaped protrusion in its extending direction includes one or more of the following: straight, saddle-shaped, serrated, and arc-shaped. The shape of the strip-shaped protrusion in its extending direction can be understood as the line connecting the projections of the vertices of the strip-shaped protrusion at different positions in its extending direction onto the substrate. Please refer to... Figure 14 , Figure 14 This is a schematic diagram of a grating structure provided in one embodiment of the present application. The grating contains four grating units, and the strip-shaped protrusions in the grating units are linear in shape along their extension direction. Please refer to... Figure 15 , Figure 15 This is a schematic diagram of a grating structure provided in one embodiment of the present application. The grating contains four grating units, and the strip-shaped protrusions in the grating units are saddle-shaped in their extending direction. Please refer to... Figure 16 , Figure 16 This is a schematic diagram of a grating structure provided in one embodiment of the present application. The grating contains four grating units, and the strip-shaped protrusions in the grating units have a serrated shape in their extending direction. The saddle-shaped and serrated strip-shaped protrusions in their extending direction can further enhance the matte finish of the decorative layer on top of the woven grid effect, thereby enriching the appearance of the decorative substrate. Please refer to... Figure 17 , Figure 17 This is a schematic diagram of a grating structure provided in one embodiment of the present application. The grating contains four grating units, and the strip-shaped protrusions in the grating units are arc-shaped in their extension direction. The arc-shaped strip-shaped protrusions can adjust the details of the grating protrusions, making the appearance of the decorative substrate more diverse.

[0072] In some embodiments of this application, the decorative substrate further includes a finishing layer, which comprises one or more of a color-developing layer, a frosted layer, and a glitter layer. In these embodiments, the color-developing layer can be a coating layer or an ink layer, as long as it has a certain color. The combination of the color-developing layer and the texture layer can achieve color variations in a single-color coating, thereby giving the decorative substrate a rich color appearance. The frosted layer has a certain anti-slip function and a softer visual effect, which can enrich the product's appearance. The glitter layer refers to a finishing layer that can present a sparkling effect. In some embodiments, the glitter layer includes a coating doped with glitter particles. Setting a glitter layer can give the decorative substrate a certain dazzling effect. In some embodiments, the finishing layer is disposed on the surface of the texture layer. In some embodiments, the finishing layer is disposed on the surface of the substrate. In some embodiments, the finishing layer is disposed on the surfaces of both the substrate and the texture layer.

[0073] In the decorative substrate provided in this application, the texture layer has a regularly distributed micro-texture structure. When light shines on the texture surface, the strip-shaped protrusions with different angles, widths, and cross-sections in the texture layer cause light of different wavelengths to be reflected, scattered, or refracted to form a realistic visual effect with changes in highlights, midtones, and shadows. This makes the surface of the decorative substrate present a three-dimensional light and shadow effect with raised small grids, thereby greatly improving the aesthetics of the product.

[0074] This application also provides a method for preparing the decorative substrate. In embodiments of this application, the method for preparing the textured layer includes one or more of etching, UV transfer printing, and hot pressing. In some embodiments, the substrate includes a transparent film, such as a polyester substrate (PET film), a polycarbonate substrate (PC film), a polymethyl methacrylate substrate (PMMA film), or a PC / PMMA composite board. The method for preparing the decorative substrate includes: creating a textured master on a mold according to the pattern of the textured layer; transferring the textured master onto the surface of the substrate to obtain the decorative substrate. In some embodiments, the substrate includes a plastic sheet. The method for preparing the decorative substrate includes: transferring the textured master onto the surface of the substrate; and hot pressing to obtain the decorative substrate, wherein the obtained decorative substrate is a textured plastic sheet. In some embodiments, the substrate includes glass. The method for preparing the decorative substrate includes: preparing a mask on the surface of the substrate according to the pattern of the textured layer; etching the substrate, wherein the etching effect is stronger where the mask is thinner and weaker where the mask is thicker, thereby forming a textured pattern on the surface of the substrate to obtain the decorative substrate, wherein the obtained decorative substrate is textured glass. The method for preparing the decorative substrate provided in this application is technically mature, has a simple process, and produces products with high stability, thereby improving the product yield and making it suitable for mass production.

[0075] This application also provides a cover plate, which includes a decorative substrate and a base material. The base material is used to enhance the structural strength of the cover plate and can be one or more of plastic, metal, ceramic, and glass. This cover plate can present a three-dimensional woven grid pattern similar to fabric, thereby greatly improving its aesthetics and showing good market prospects. In some embodiments of this application, the cover plate can be used as a housing for communication equipment. The unique appearance of the cover plate can improve product recognition.

[0076] This application also provides an electronic device that includes the aforementioned cover plate. Please refer to [link / reference needed]. Figure 18 , Figure 18 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 200 includes a display component 201 and a housing 202, wherein the housing 202 includes the cover plate of this application. In the embodiments of this application, the electronic device may specifically be a mobile phone, computer, watch, USB flash drive, electronic cigarette, wearable device, digital camera, etc.

[0077] The implementation methods of this application will be further described below through specific embodiments.

[0078] Example 1

[0079] A decorative substrate is prepared by means of: designing a grayscale image of a textured pattern, importing the grayscale image into a control computer, and obtaining the decorative substrate by identifying the grayscale values ​​on the grayscale image and performing processes such as laser direct writing.

[0080] Please see Figure 19 , Figure 19 This is a top view of the decorative substrate provided in Embodiment 1 of this application. Figure 19 In the process, the surface of the decorative substrate is provided with multiple gratings. The area outlined in white is a grating. A grating includes four grating units arranged in a ring around the center point and spliced ​​together. Each grating unit includes multiple strip-shaped protrusions extending in parallel directions. The multiple strip-shaped protrusions are arranged sequentially in the radial direction of a circle with the center point as the center.

[0081] Please see Figure 20 , Figure 20 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 1 of this application. Figure 20 As can be seen, the raster grid contains a certain brightness gradient, and the arrangement of multiple raster grids achieves a grid effect. Please refer to [link / reference]. Figure 21 , Figure 21 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 1 of this application. Figure 21 As can be seen, the decorative substrate of this application can present a three-dimensional effect of woven grid pattern on a macroscopic scale.

[0082] Example 2

[0083] A decorative substrate is prepared by means of: designing a grayscale image of a textured pattern, importing the grayscale image into a control computer, and obtaining the decorative substrate by identifying the grayscale values ​​on the grayscale image and performing processes such as laser direct writing.

[0084] Please see Figure 22 , Figure 22 This is a top view of the decorative substrate provided in Embodiment 2 of this application. Figure 22 In the process, the surface of the decorative substrate is provided with multiple gratings. The area outlined in black is a grating. A grating includes three grating units arranged in a ring around the center point and spliced ​​together. Each grating unit includes multiple strip-shaped protrusions extending in parallel directions. The multiple strip-shaped protrusions are arranged sequentially in the radial direction of a circle with the center point as the center.

[0085] Please see Figure 23 , Figure 23 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 2 of this application. Figure 23 As can be seen, the raster grid contains a certain brightness gradient, and the arrangement of multiple raster grids achieves a grid effect. Please refer to [link / reference]. Figure 24 , Figure 24 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 2 of this application. Figure 24 As can be seen, the decorative substrate of this application can present a three-dimensional effect of woven grid pattern on a macroscopic scale.

[0086] Example 3

[0087] A decorative substrate is prepared by means of: designing a grayscale image of a textured pattern, importing the grayscale image into a control computer, and obtaining the decorative substrate by identifying the grayscale values ​​on the grayscale image and performing processes such as laser direct writing.

[0088] Please see Figure 25 , Figure 25 This is a top view of the decorative substrate provided in Embodiment 3 of this application. Figure 25 In the process, the surface of the decorative substrate is provided with multiple gratings. The area outlined in black is a grating. A grating includes five grating units arranged in a ring around the center point and spliced ​​together. Each grating unit includes multiple strip-shaped protrusions extending in parallel directions. The multiple strip-shaped protrusions are arranged sequentially in the radial direction of a circle with the center point as the center.

[0089] Please see Figure 26 , Figure 26 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 3 of this application. Figure 26 As can be seen, the raster grid contains a certain brightness gradient, and the arrangement of multiple raster grids achieves a grid effect. Please refer to [link / reference]. Figure 27 , Figure 27This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 3 of this application. Figure 27 As can be seen, the decorative substrate of this application can present a three-dimensional effect of woven grid pattern on a macroscopic scale.

[0090] Example 4

[0091] A decorative substrate is prepared by means of: designing a grayscale image of a textured pattern, importing the grayscale image into a control computer, and obtaining the decorative substrate by identifying the grayscale values ​​on the grayscale image and performing processes such as laser direct writing.

[0092] Please see Figure 28 , Figure 28 This is a top view of the decorative substrate provided in Embodiment 4 of this application. Figure 28 In the process, the surface of the decorative substrate is provided with multiple gratings. The area outlined in white is a grating. A grating includes four grating units arranged in a ring around the center point. There are gaps between the grating units. Each grating unit includes multiple strip-shaped protrusions with parallel extension directions. The multiple strip-shaped protrusions are arranged sequentially in the radial direction of a circle with the center point as the center.

[0093] Please see Figure 29 , Figure 29 This is a schematic diagram of the grid effect of the decorative substrate provided in Embodiment 4 of this application. Figure 29 As can be seen, the raster grid contains a certain brightness gradient, and the arrangement of multiple raster grids achieves a grid effect. Please refer to [link / reference]. Figure 30 , Figure 30 This is a schematic diagram of the weaving effect of the decorative substrate provided in Embodiment 4 of this application. Figure 30 As can be seen, the decorative substrate of this application can present a three-dimensional effect of woven grid pattern on a macroscopic scale.

[0094] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the design concept of this application, and these modifications and improvements all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A decorative substrate, characterized in that, The decorative substrate includes a substrate and a textured layer disposed on the surface of the substrate. The textured layer has a plurality of gratings on the side of its surface away from the substrate. At least a plurality of the gratings include a plurality of grating units arranged in a ring around a center point. Each grating unit includes a plurality of strip-shaped protrusions, which are arranged sequentially in the radial direction of a circle centered at the center point. In the grating, there is a gap between adjacent grating units, and the distance from the grating unit to the center point is less than or equal to 1 / 5 of the diameter of the circumcircle of the grating; in the grating, the strip-shaped protrusion includes a first surface near the center point and a second surface away from the center point, the first surface and the second surface are in contact with the bottom surface of the strip-shaped protrusion, and the angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion.

2. The decorative substrate as described in claim 1, characterized in that, In the grating, adjacent grating units have a common edge, and multiple grating units intersect at the center point.

3. The decorative substrate as described in claim 1, characterized in that, In the grating, there is a gap between adjacent grating units, and the distance from the grating unit to the center point is less than or equal to 100 μm.

4. The decorative substrate as described in any one of claims 1-3, characterized in that, The angle between the first surface and the bottom surface of the strip-shaped protrusion is 11°~40°.

5. The decorative substrate as described in any one of claims 1-3, characterized in that, The angle between the second surface and the bottom surface of the strip-shaped protrusion is 80°~100°.

6. The decorative substrate as described in any one of claims 1-3, characterized in that, In the grating, adjacent grating units are mirror-symmetrical along the axis of symmetry, and the angle between the extension direction of each strip-shaped protrusion and the axis of symmetry is 20° to 70°.

7. The decorative substrate as described in any one of claims 1-3, characterized in that, The ratio of the height of the strip-shaped protrusion to the width of its bottom surface is 0.05 to 0.

4.

8. The decorative substrate as described in any one of claims 1-3, characterized in that, In the grating unit, in a direction centered on the center point and away from the center point, the aspect ratio of multiple strip-shaped protrusions gradually decreases, and the aspect ratio is the ratio of the height of the strip-shaped protrusion to the width of the bottom surface of the strip-shaped protrusion.

9. The decorative substrate as described in any one of claims 1-3, characterized in that, In the grating unit, the aspect ratio difference between adjacent strip-shaped protrusions is less than or equal to 0.

1.

10. The decorative substrate according to any one of claims 1-3, characterized in that, The height of the strip-shaped protrusion is 0.1μm to 20μm, and the width of the bottom surface of the strip-shaped protrusion is 1μm to 150μm.

11. The decorative substrate according to any one of claims 1-3, characterized in that, The longest strip-shaped protrusion in the grating unit has a length of 100μm to 3000μm in its extension direction.

12. The decorative substrate according to any one of claims 1-3, characterized in that, In the texture layer, adjacent raster grids are mirror-symmetrical along the axis of symmetry; the distance from the raster grid to the axis of symmetry is less than or equal to 1 / 10 of the diameter of the circumcircle of the raster grid, or the distance from the raster grid to the axis of symmetry is less than or equal to 50 μm.

13. The decorative substrate as described in any one of claims 1-3, characterized in that, The truncated shape of the strip-shaped protrusion in the first direction includes one or more of a straight segment and an arc segment; the first direction is perpendicular to both the substrate and the extension direction of the strip-shaped protrusion.

14. The decorative substrate according to any one of claims 1-3, characterized in that, The shape of the strip-shaped protrusion in its extending direction includes one or more of the following: straight, saddle-shaped, serrated, and arc-shaped.

15. The decorative substrate according to any one of claims 1-3, characterized in that, The decorative substrate further includes a finishing layer, which includes one or more of a color layer, a frosted layer, and a glitter layer, and the finishing layer is disposed on the surface of the texture layer and / or the substrate.

16. A method for preparing a decorative substrate, characterized in that, Includes the following steps: A textured layer is formed on the surface of a substrate to obtain the decorative substrate. The method for preparing the textured layer includes one or more of transfer printing, etching, and hot pressing. The textured layer has a plurality of gratings on the side of the surface away from the substrate. At least a plurality of the gratings include a plurality of grating units arranged in a ring around a center point. The grating units include a plurality of strip-shaped protrusions, and the plurality of strip-shaped protrusions are arranged sequentially in the radial direction of a circle centered on the center point. In the grating, there is a gap between adjacent grating units, and the distance from the grating unit to the center point is less than or equal to 1 / 5 of the diameter of the circumcircle of the grating; in the grating, the strip-shaped protrusion includes a first surface near the center point and a second surface away from the center point, the first surface and the second surface are in contact with the bottom surface of the strip-shaped protrusion, and the angle between the first surface and the bottom surface of the strip-shaped protrusion is less than or equal to the angle between the second surface and the bottom surface of the strip-shaped protrusion.

17. A cover plate, characterized in that, The cover plate includes a decorative substrate and a base as described in any one of claims 1-15, wherein the decorative substrate is disposed on the surface of the base.

18. An electronic device, characterized in that, The electronic device includes the cover plate as described in claim 17.

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