Decorated substrate, method for preparing the same, cover plate, and electronic device

Abstract

The present application provides a decorated substrate, a method for preparing the same, a cover plate, and an electronic device. The decorated substrate includes a base material and a texture layer disposed on the surface of the base material. The texture layer is provided with a plurality of protrusions arranged in an array. The first direction is an arbitrary direction within the plane where the texture layer is located. Each protrusion includes a protrusion bottom surface and a vertex, and in the first direction, the distance between the projection point of the vertex of the plurality of protrusions on the protrusion bottom surface and the center of the protrusion bottom surface gradually changes, and / or in the first direction, the height of the vertex of the plurality of protrusions with respect to the protrusion bottom surface gradually changes.

Description

Technical Field

[0001] This disclosure claims the priority of Chinese Patent Application No. 202210929657.0, titled "Decorative Substrate and Its Preparation Method and Use", filed on August 3, 2022, the entire content of which is incorporated herein by reference.

[0002] Technical Field This disclosure relates to the field of decoration technology, and in particular, to a decorative substrate and its preparation method, a cover plate, and an electronic device.

Background Art

[0003] As a new type of decorative material, the gradient color decorative film is widely used in electronic devices and other fields. However, the existing gradient color decorative films mainly achieve color changes by coating. The change of the gradient color is limited by the coating structure, the change of the gradient color is relatively fixed and single, the gradient color decorative film has the same gradient color at different angles, and the color change is not sufficiently three-dimensional, so it cannot meet the needs of consumers.

Summary of the Invention

Means for Solving the Problems

[0004] In order to solve the above problems, this disclosure provides a decorative substrate having different color gradients under different viewing angles so as to show a good decorative effect.

[0005] The first aspect of this disclosure provides a decorative substrate, which includes a base material and a texture layer disposed on the surface of the base material. A plurality of protrusions are arranged in an array in the texture layer, and the first direction is any direction in the plane where the texture layer is located.

[0006] Each protrusion has a protrusion bottom surface and a vertex. In the first direction, the distance between the projection point of the vertex of the plurality of protrusions on the protrusion bottom surface and the center of the protrusion bottom surface gradually changes, and / or in the first direction, the height of the vertex of the plurality of protrusions with respect to the protrusion bottom surface gradually changes.

[0007] In the present disclosure, since the plurality of protrusions in the texture layer have a regularly changing structure, light can be reflected, scattered, refracted or other effects can be exerted by the protrusions of different structures, and then light of different intensities is reflected, showing a change in luminance, and different colors are scattered, showing a gradient color effect. The decorative substrate with such a structure can show a dynamic color change under different viewing angles, that is, it has a gradient effect that changes in real time, and greatly improves the decorative effect.

[0008] In one example, the height of the vertex of the plurality of protrusions with respect to the protrusion bottom surface gradually changes in the first direction, and for every 1 cm of distance in the first direction, the change in the height of the vertex of the plurality of protrusions with respect to the protrusion bottom surface is in the range of 0.2 μm to 6 μm.

[0009] In one example, the shape of the protrusion bottom surface includes any one of a polygon or a circle. In the first direction, the distance between the projection point of the vertex of the plurality of protrusions on the protrusion bottom surface and the center of the protrusion bottom surface gradually changes, and for every 1 cm of distance in the first direction, the change in the distance between the projection point of the vertex of the plurality of protrusions on the protrusion bottom surface and the center of the protrusion bottom surface is in the range of 1 μm to 200 μm.

[0010] In one example, the change in the distance between adjacent protrusions is in the range of 1 μm to 10 mm.

[0011] In one example, the shape of the protrusion bottom surface is circular, and the radius of the protrusion bottom surface is in the range of 1 μm to 10 mm.

[0012] In one example, the shape of the protrusion bottom surface is polygonal, and the radius of the circumscribed circle of the protrusion bottom surface is in the range of 1 μm to 10 mm.

[0013] In one example, the shape of the bottom surface of the protrusion is circular, and the ratio of the radius of the bottom surface of the protrusion to the distance between adjacent protrusions is (2 to 3):1.

[0014] In one example, the shape of the bottom surface of the protrusion is polygonal, and the ratio of the radius of the circumscribed circle of the bottom surface of the protrusion to the distance between adjacent protrusions is (2 to 3):1.

[0015] In one example, the height of the vertex of the protrusion with respect to the bottom surface of the protrusion is in the range of 0.1 μm to 20 μm.

[0016] In one example, the shape of the bottom surface of the protrusion is circular, and the radii of a plurality of bottom surfaces of the protrusions gradually change in a second direction, and the second direction is an arbitrary direction in the plane where the texture layer is located.

[0017] In one example, the shape of the bottom surface of the protrusion is polygonal, and the radii of the circumscribed circles of a plurality of bottom surfaces of the protrusions gradually change in a second direction, and the second direction is an arbitrary direction in the plane where the texture layer is located.

[0018] In one example, the shape of the bottom surface of the protrusion is polygonal, and a plurality of bottom surfaces of the protrusions have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, and a plurality of bottom surfaces of the protrusions have a relative rotation angle that gradually changes with respect to the first array direction or the second array direction.

[0019] In one example, the shape of the side surface of the protrusion is any one of a flat surface, a straight surface, or a curved surface.

[0020] In one example, in a first direction, the projection points of the vertices of a plurality of protrusions on the bottom surface of the protrusion are connected so as to form an arrangement path of the vertices of the protrusions, and the arrangement path includes a straight path and / or a curved path.

[0021] In one example, the first array direction is defined as the array direction of a plurality of protrusions, the shape of the bottom surface of the protrusion is quadrilateral, and in the first array direction, the projection points of the vertices of a plurality of protrusions are arranged in order along the diagonal of the quadrilateral.

[0022] In one example, the first array direction is defined as the array direction of a plurality of protrusions, the shape of the bottom surface of the protrusion is a quadrilateral, and in the first array direction, the projection points of the vertices of the plurality of protrusions are sequentially arranged along a predetermined line segment, and the predetermined line segment is a line segment parallel to the side length of the quadrilateral.

[0023] In one example, in the first direction, the projection points of the vertices of the plurality of protrusions onto the bottom surface of the protrusion are projected onto the same axis of the bottom surface of the protrusion passing through the center of the bottom surface of the protrusion.

[0024] In one example, the axis includes the axis of symmetry of the bottom surface of the protrusion or a line segment passing through the center of the bottom surface of the protrusion, and the line segment is a line connecting any two points on the circumference of the bottom surface of the protrusion.

[0025] In one example, the plurality of bottom surfaces of the protrusions have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, the sizes of the bottom surfaces of the plurality of protrusions gradually decrease in the first array direction and / or the second array direction, and the distance between adjacent protrusions gradually increases.

[0026] In one example, the plurality of bottom surfaces of the protrusions have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, the sizes of the bottom surfaces of the plurality of protrusions gradually decrease in the first array direction, and for every 1 cm in the first array direction, the change in the size of the bottom surfaces of the plurality of protrusions is in the range of 0.1 μm to 100 μm.

[0027] In one example, the decorative substrate further includes a finishing layer, the finishing layer includes one or more of a color developing layer, a matte layer, and a brightening layer, and the finishing layer is provided on the surface of the texture layer and / or the substrate.

[0028] The second aspect of the present disclosure is a method for preparing a decorative substrate, and this method A step of forming a texture layer on the surface of a substrate to obtain a decorative substrate, wherein the preparation method of the texture layer includes one or more of transfer printing, etching, and thermocompression molding, and a plurality of protrusions arranged in an array are provided on the surface of the texture layer. The first direction is any direction within the plane where the texture layer is located. Each protrusion has a protrusion bottom surface and a vertex. In the first direction, the distance between the projection point of the vertex of the plurality of protrusions on the protrusion bottom surface and the center of the protrusion bottom surface gradually changes. And / or in the first direction, the height of the vertices of the plurality of protrusions with respect to the protrusion bottom surface gradually changes.

[0029] The preparation method provided by the present disclosure is simple and easy to operate, its process is mature, and it is convenient for industrial production.

[0030] A third aspect of the present disclosure provides a cover plate including the decorative substrate according to the first aspect of the present disclosure and a base body, and the decorative substrate is disposed on the surface of the base body.

[0031] A fourth aspect of the present disclosure provides an electronic device including the cover plate according to the third aspect of the present disclosure.

Brief Description of the Drawings

[0032]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 5C

Figure 6A

Figure 6B

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 15A

Figure 15B

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Figure 27

Figure 28

Figure 29

Figure 30

Figure 31

Figure 32

Mode for Carrying Out the Invention

[0033] The technical scheme in the examples of the present disclosure will be clearly and completely described in combination with the drawings attached to the examples of the present disclosure. Obviously, the described examples are only a part of the examples of the present disclosure, not all of them. Based on the examples in the present disclosure, all other examples that can be obtained by those skilled in the art without creative work can fall within the protection scope of this application.

[0034] Referring to FIG. 1, which is a structural diagram of the decorated substrate 100 according to an example of the present disclosure, the decorated substrate 100 includes a base material 20 and a texture layer 10 disposed on the surface of the base material 20. The base material 20 includes, but is not limited to, one or more of plastic, metal, ceramic, and glass. Referring to FIG. 2, which is a structural diagram of the texture layer 10 according to an example of the present disclosure, the texture layer 10 is provided with a plurality of protrusions 11 arranged in an array, and the array directions include a first array direction and a second array direction. In the present disclosure, the bottom surface 112 of the protrusion refers to the side surface of the protrusion 11 close to the texture layer 10, and the apex of the protrusion 11 refers to the point on the surface away from the texture layer 10 where the protrusion 11 is farthest from the texture layer 10. Referring to FIG. 8, which is a schematic diagram of the three-dimensional structure of the protrusion 11 according to an example of the present disclosure, each protrusion 11 includes an apex 111 and a bottom surface 112 of the protrusion. The apex 111 of the protrusion 11 is the highest point of the protrusion 11 with respect to the bottom surface 112 of the protrusion. In the example of the present disclosure, the shapes of the plurality of bottom surfaces 112 of the protrusion 11 include, but are not limited to, either a polygon or a circle, and the polygon may be a regular polygon or other polygon. As shown in FIG. 2, the shapes of the plurality of bottom surfaces 112 corresponding to the plurality of protrusions 11 are quadrilaterals. Referring to FIG. 3, which is a structural diagram of the texture layer according to an example of the present disclosure, the shapes of the plurality of bottom surfaces corresponding to the plurality of protrusions 11 are pentagons. Referring to FIG. 4, which is a structural diagram of the texture layer according to an example of the present disclosure, the shapes of the plurality of bottom surfaces corresponding to the plurality of protrusions are hexagons.

[0035] In the example of the present disclosure, the side surface of the protrusion may be any of a plane, a straight surface, and a curved surface. Referring to FIGS. 5A, 5B, and 5C, FIG. 5A is a structural diagram when the edge of the protrusion is a straight line, and FIGS. 5B and 5C are structural diagrams when the edge of the protrusion is curved. Specifically, the shapes of the plurality of bottom surfaces 112 corresponding to the plurality of protrusions 11 in FIGS. 5A, 5B, and 5C are all quadrilaterals, and the structures of the plurality of protrusions are all quadrangular pyramids. The difference is that in FIG. 5A, the edges of the quadrangular pyramid are straight lines and the side surfaces of the quadrangular pyramid are planes; in FIG. 5B, the edges of the quadrangular pyramid are upwardly convex arcs and the side surfaces of the quadrangular pyramid are curved surfaces; and in FIG. 5C, the edges of the quadrangular pyramid are downwardly convex arcs and the side surfaces of the quadrangular pyramid are curved surfaces.

[0036] In some examples of the present disclosure, the array structure formed by a plurality of protrusions may be any of a ring array, a rectangular array, or a curved array. Correspondingly, the array direction includes any of a linear direction, a curved direction, or a circular direction. A schematic diagram of a rectangular array is shown in FIG. 2. Referring to FIGS. 6A and 6B, FIG. 6A is a structural diagram of an array arrangement along the S-shaped direction of the protrusions according to an example of the present disclosure, that is, the array direction of the protrusions is an S-shaped curve, and FIG. 6B is a structural diagram of an array arrangement along the M-shaped direction of the protrusions, that is, the array direction of the protrusions is an M-shaped curve. Refer to FIG. 7, which provides a structural diagram of a ring array according to an example of the present disclosure.

[0037] To clearly express the scheme of the present disclosure, some terms of the present disclosure are explained below.

[0038] The center of the protrusion bottom surface: When the shape of the protrusion bottom surface is circular, the center of the protrusion bottom surface is the center of the circle; when the shape of the protrusion bottom surface is polygonal, the center of the protrusion bottom surface is the center of the circumscribed circle of the polygon.

[0039] The size of the protrusion bottom surface: When the shape of the protrusion bottom surface is circular, the size of the protrusion bottom surface is the radius of the circle; when the shape of the protrusion bottom surface is polygonal, the size of the protrusion bottom surface is the radius of the circumscribed circle of the polygon.

[0040] In the present disclosure, the positions of the vertices of a plurality of protrusions gradually change in a first direction, and this change can be a change in the height of the vertices of the protrusions or a change in the projection position of the vertices of the protrusions onto the bottom surface of the protrusions. The first direction can be the array direction of the plurality of protrusions or any direction within the plane in which the texture layer is located. For details, referring again to FIG. 8, which is a schematic diagram of the three-dimensional structure of the protrusion 11 according to an example of the present disclosure, the height h of the vertex of the protrusion 11 refers to the distance between the vertex 111 of the protrusion 11 and the bottom surface 112 of the protrusion 11. The change in the height h of the vertex of the protrusion 11 refers to the gradual change in the height h of the vertices of the plurality of protrusions 11 in the first direction. The gradual change means that it can gradually increase or decrease, or first increase and then decrease, or first decrease and then increase. Refer to FIG. 9, which is a structural diagram of the bottom surface 112 of the protrusion according to an example of the present disclosure. In FIG. 9, the center O of the bottom surface 112 of the protrusion is the center of the circumscribed circle 110 of the bottom surface 112 of the protrusion, and the projection point of the vertex of the protrusion 11 onto the bottom surface 112 is H. The distance between the projection point H of the vertex 111 of the protrusion 11 onto the bottom surface 112 and the center O of the bottom surface 112 is d. The change in the position of the projection point H of the protrusion 11 onto the bottom surface 112 with respect to the center O of the bottom surface 112 means that the distance between the projection point H of the vertex 111 of the protrusion 11 onto the bottom surface 112 and the center O of the bottom surface 112 gradually changes. The gradual change can gradually increase or decrease, or first increase and then decrease, or first decrease and then increase. In the present disclosure, by setting the change in the protrusion structure in the protrusion array, the texture layer can be changed at different stages at different angles. Due to the directional arrangement of the protrusions, the color gradient becomes more natural, and a three-dimensional gradient effect of the decorative substrate can be obtained.

[0041] In some examples of the present disclosure, in a first direction, the distance between the projection point of the apex of a plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion gradually changes. It should be noted that in the present disclosure, since the patterns of the bottom surfaces of the plurality of protrusions in the texture layer are the same or similar, the position of the center of the bottom surface of the protrusion is the same even for different protrusions. Refer to FIG. 10, which is a structural diagram of the change in the protrusion structure according to an example of the present disclosure. In FIG. 10, the shape of the bottom surface of the protrusion is a quadrilateral, and the structure of the protrusion is a quadrangular pyramid. As a result, the projection position of the apex of the quadrangular pyramid on the bottom surface of the protrusion changes, and correspondingly, the structure of the quadrangular pyramid changes. Refer to FIG. 11, which is a structural diagram of the change in the protrusion structure according to an example of the present disclosure. In FIG. 11, the shape of the bottom surface of the protrusion is a pentagon, and the structure of the protrusion is a pentagonal pyramid. The projection position of the apex of the pentagonal pyramid on the bottom surface of the protrusion changes, and correspondingly, the structure of the pentagonal pyramid changes. Refer to FIG. 12, which is a structural diagram of the change in the protrusion structure according to an example of the present disclosure. In FIG. 12, the shape of the bottom surface of the protrusion is a hexagon, and the structure of the protrusion is a hexagonal pyramid. The projection position of the apex of the hexagonal pyramid on the bottom surface of the protrusion changes, and correspondingly, the structure of the hexagonal pyramid changes. Due to the change in the position of the apex of the protrusion with respect to the center of the bottom surface of the protrusion, the angle and size of the side surface of the protrusion can change. Therefore, light reflects light with different intensities at different positions in the texture layer, shows a change in luminance, scatters different colors, and shows a gradient color effect.

[0042] In the present disclosure, the fact that the distance between the projection point of the apex of a plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion gradually changes means that in the direction in which the positions of the apices of the plurality of protrusions change (i.e., the first direction), the projection points of the apices of the plurality of protrusions on the bottom surface of the protrusion gradually approach the center of the bottom surface of the protrusion or gradually move away from the center of the bottom surface of the protrusion. It can be understood that the arrangement path of the apices of the plurality of protrusions is obtained by connecting the projection points of the apices of the plurality of protrusions on the bottom surface of the protrusion. The arrangement path can be at least one of a straight path and a curved path. Referring to FIGS. 13A and 13B, FIG. 13A is a schematic diagram of the arrangement of a plurality of protrusions A1, A2, and A3 according to an example of the present disclosure, and FIG. 13B is a structural diagram of the position change of the projection points H1, H2, and H3 of the apices of the plurality of protrusions A1, A2, and A3 in FIG. 13A on the bottom surface of the protrusion. The shapes of the plurality of bottom surfaces 112 of the protrusions corresponding to the plurality of protrusions A1, A2, and A3 are quadrilaterals, and the first direction X is the array direction of the protrusions A1, A2, and A3. In the first direction X, the projection points H1, H2, and H3 of the apices of the plurality of protrusions A1, A2, and A3 on the bottom surface of the protrusion are arranged in order along the diagonal line P of the quadrilateral. Referring to FIGS. 14A and 14B, FIG. 14A is a schematic diagram of the arrangement of protrusions A1, A2, and A3 according to another example of the present disclosure, and FIG. 14B is a structural diagram of the position change of the projection points H1, H2, and H3 of the apices of the plurality of protrusions A1, A2, and A3 in FIG. 14A on the bottom surface of the protrusion. The shapes of the plurality of bottom surfaces 112 of the protrusions corresponding to the plurality of protrusions A1, A2, and A3 are quadrilaterals. Exemplarily, in this example, the quadrilateral is composed of four side lengths 113 of the same length. In some examples, the quadrilateral may further include four side lengths 113 of different lengths. A predetermined line segment l1 is defined as a line segment parallel to the side length 113 of the quadrilateral, and in the first direction X, the apices of the plurality of protrusions A1, A2, and A3 move along the predetermined line segment l1. Exemplifying, in this example, the predetermined line segment l1 is located within the bottom surface 112 of the protrusion. In some examples, the predetermined line segment l1 may also be at least partially located within the bottom surface 112 of the protrusion.

[0043] In some examples of the present disclosure, in a first direction, the projection points of the vertices of the plurality of protrusions onto the bottom surface of the protrusion are all located on the same axis passing through the center point of the bottom surface of the protrusion. The axis passing through the center of the bottom surface of the protrusion can be, for example, the axis of symmetry of the bottom surface of the protrusion, or any line segment passing through the center of the bottom surface of the protrusion (a line connecting any two points around the bottom surface of the protrusion). That is, in the first direction, the arrangement path of the vertices of the protrusions is obtained by connecting the projection points of the vertices of the plurality of protrusions onto the bottom surface of the protrusion, and coincides with the axis of symmetry of the bottom surface of the protrusion or a line segment passing through the center point of the bottom surface of the protrusion. In some examples of the present disclosure, the shape of the bottom surface of the protrusion is polygonal, and in the first direction, the projection points of the vertices of the plurality of protrusions onto the bottom surface of the protrusion are all located on the same line segment (a line connecting any two points around the bottom surface of the protrusion) parallel to any side of the polygon of the bottom surface of the protrusion. The texture layer formed by the array arrangement of the protrusions having the above structure can make the color transition of the decorative substrate more natural.

[0044] In some examples of the present disclosure, in a first direction, the distance between the projection point of the apex of a plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion gradually changes. For every 1 cm of distance in the first direction, the change in the distance between the projection point of the apex of the plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion is in the range of 1 μm to 200 μm. Taking FIG. 13B as an example, a plurality of protrusions A1, A2, and A3 are in the first direction X. The distances d1, d2, and d3 between the projection points H1, H2, and H3 of the apexes of the plurality of protrusions A1, A2, and A3 on the bottom surface 112 of the protrusion and the center O of the bottom surface 112 gradually become shorter in the first direction X. For example, the distance between the projection point H1 of the apex of protrusion A1 on the bottom surface 112 of the protrusion and the center O of the bottom surface 112 is d1, the distance between the projection point H2 of the apex of protrusion A2 on the bottom surface 112 of the protrusion and the center O of the bottom surface 112 is d2, and the distance between the projection point H3 of the apex of protrusion A3 on the bottom surface 112 of the protrusion and the center O of the bottom surface 112 is d3, and d1 > d2 > d3. Since the distance between protrusion A1 and protrusion A3 is 1 cm (some protrusions can be omitted in the middle), the change in the distance between the projection point of the apex of the protrusion on the bottom surface of the protrusion and the center of the bottom surface of the protrusion is in the range of d1 to d3. In some examples of the present disclosure, the first direction is the direction of curvature, and the distance of 1 cm refers to the length of the arc segment being 1 cm.

[0045] In some examples of the present disclosure, in a first direction, the heights of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusions change gradually. Refer to FIGS. 15A and 15B. FIG. 15A is a schematic diagram of the arrangement of a plurality of protrusions A1, A2, and A3 according to still another example of the present disclosure. FIG. 15B is a structural diagram of the change in the heights of the vertices 111 of the plurality of protrusions A1, A2, and A3 in FIG. 15A. Here, the shapes of the plurality of protrusion bottom surfaces 112 of the plurality of protrusions A1, A2, and A3 are all quadrilaterals, and the first direction X is the array direction of the plurality of protrusions A1, A2, and A3. For example, in this example, the shapes of the plurality of protrusion bottom surfaces 112 corresponding to the plurality of protrusions A1, A2, and A3 are the same, that is, the centers O of the plurality of protrusion bottom surfaces 112 corresponding to the plurality of protrusions A1, A2, and A3 are all located at the intersection of the diagonals of the quadrilateral. In some examples, the shapes of the plurality of protrusion bottom surfaces 112 corresponding to the plurality of protrusions A1, A2, and A3 may also be the same. In the first direction X, the heights h1, h2, and h3 of the vertices 111 of the plurality of protrusions A1, A2, and A3 with respect to the protrusion bottom surface 112 gradually decrease. The change in the height of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusions can also change the angle and size of the side surfaces of the protrusions. As a result, light is reflected at different intensities at different positions of the texture layer, showing a change in luminance, scattering different colors, and showing a gradation effect.

[0046] In some examples of the present disclosure, in a first direction, the height of the apexes of a plurality of protrusions with respect to the bottom surface of the protrusions changes gradually. For every 1 cm of distance in the first direction, the change in the height of the apex of the protrusion with respect to the bottom surface of the protrusion is in the range of 0.2 μm to 6 μm. The change in the specific height of the apex of the protrusion with respect to the bottom surface of the protrusion can be, but is not limited to, 0.2 μm, 0.3 μm, 0.4 μm, 0.5 μm, or 0.6 μm. Referring to FIG. 15B again, for example, in this example, the texture layer has a plurality of protrusions A1, A2, and A3 in the first direction X, and the heights h1, h2, and h3 of the plurality of protrusions A1, A2, and A3 gradually decrease in the first direction X. For example, the height of the apex 111 of the protrusion A1 with respect to the bottom surface 112 of the protrusion is h1, the height of the apex 111 of the protrusion A2 with respect to the bottom surface 112 of the protrusion is h2, the height of the apex 111 of the protrusion A3 with respect to the bottom surface 112 of the protrusion is h3, and h1 > h2 > h3. Note that since the distance between the protrusion A1 and the protrusion A3 is 1 cm (some protrusions can be omitted in the middle), the change in the heights h1 and h3 of the apexes 111 of the protrusions A1 and A3 with respect to the bottom surface 112 of the protrusion is in the range of h1 to h3.

[0047] In some examples of the present disclosure, the size of the bottom surface of the protrusion is in the range of 1 μm to 10 mm. The specific size of the bottom surface of the protrusion can be, but is not limited to, 1 μm, 20 μm, 50 μm, 80 μm, 100 μm, 200 μm, 500 μm, 800 μm, 1 mm, 1.5 mm, 2 mm, 3 mm, 5 mm, 7 mm, or 10 mm. When the shape of the bottom surface of the protrusion is circular, the size of the bottom surface of the protrusion is the radius of the circle, that is, the radius of the circle is in the range of 1 μm to 10 mm. When the shape of the bottom surface of the protrusion is polygonal, the size of the bottom surface of the protrusion is the radius of the circumscribed circle of the polygon, that is, the radius of the circumscribed circle of the polygon is in the range of 1 μm to 10 mm. Refer to FIG. 16, which is a structural diagram of the texture layer 10 according to an example of the present disclosure. In the present disclosure, the distance d5 between adjacent protrusions 11 refers to the difference between the length L1 of the line connecting the centers O of the bottom surfaces of two adjacent protrusions 11 and the size L2 of the bottom surfaces of the two protrusions. In other words, the distance d5 between adjacent protrusions 11 is the length of the planar region between the bottom surfaces 112 of the protrusions. In some examples of the present disclosure, the distance d5 between adjacent protrusions 11 is in the range of 1 μm to 10 mm. The distance d5 between adjacent protrusions 11 can be, but is not limited to, 1 μm, 20 μm, 50 μm, 80 μm, 100 μm, 200 μm, 500 μm, 800 μm, 1 mm, 1.5 mm, 2 mm, 3 mm, 5 mm, 7 mm, or 10 mm. In some examples of the present application, the ratio of the size L2 of the bottom surface 112 of the protrusion to the distance d5 between two adjacent protrusions 11 is (2 to 3):1. The ratio of the size L2 of the bottom surface 112 of the protrusion to the distance d5 between two adjacent protrusions 11 can be, but is not limited to, 2:1, 2.5:1, 2.7:1, or 3:1. Controlling the size L2 of the bottom surface 112 of the protrusion and the distance d5 between adjacent protrusions 11 is beneficial for improving the smoothness of the color gradation and making the color change more delicate.

[0048] Please refer to FIG. 8 again. In some examples of the present disclosure, the height h of the apex 111 of the protrusion 11 with respect to the bottom surface 112 of the protrusion is in the range of 0.1 μm to 20 μm. The height h of the apex 111 of the protrusion 11 with respect to the bottom surface 112 of the protrusion can be 0.1 μm to 20 μm, but is not limited thereto. In some examples of the present disclosure, the ratio of the size of the bottom surface 112 of the protrusion to the height h of the apex 111 of the protrusion 11 with respect to the bottom surface 112 of the protrusion is 2 or more. The ratio of the size of the bottom surface 112 of the protrusion to the height h of the apex 111 of the protrusion 11 with respect to the bottom surface 112 of the protrusion can be 2, 4, 6, 8, 10, or 15, but is not limited thereto. By controlling the size of the bottom surface 112 of the protrusion and the height h of the apex 111 of the protrusion 11 with respect to the bottom surface 112 of the protrusion, the color change effect can be made more prominent.

[0049] In some examples of the present disclosure, the shape of the bottom surface of the protrusion is polygonal, and in at least one array direction, a plurality of bottom surfaces of the protrusions have a relative rotation angle that gradually changes with respect to the array direction. Please refer to FIG. 17, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 17, the shape of the bottom surface of the protrusion is quadrilateral, and in the first array direction, a plurality of bottom surfaces of the protrusions rotate in that direction with respect to the first array, and the rotation angle gradually increases. Please refer to FIG. 18, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 18, the shape of the bottom surface of the protrusion is pentagonal, and in the first array direction, a plurality of bottom surfaces of the protrusions rotate in that direction with respect to the first array, and the rotation angle gradually increases. Please refer to FIG. 19, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 19, the shape of the bottom surface of the protrusion is hexagonal, and in the first array direction, a plurality of bottom surfaces of the protrusions rotate in that direction with respect to the first array, and the rotation angle gradually increases.

[0050] In some examples of the present disclosure, in at least one array direction, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease. Refer to FIG. 20, which is a structural diagram of a texture layer provided by an example of the present disclosure. In FIG. 20, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are quadrilaterals. In the first array direction, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease. Refer to FIG. 21, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 21, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are pentagons. In the first array direction, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease. Refer to FIG. 22, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 22, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are hexagons. In the first array direction, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease.

[0051] In some examples, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease in the array direction, and the distance between adjacent protrusions gradually increases. Refer to FIG. 23, which is a structural diagram of a texture layer according to an example of the present disclosure. In FIG. 23, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are quadrilaterals, the sizes of the plurality of protrusion bottom surfaces gradually decrease in the first array direction, and the distance between adjacent protrusions gradually increases. Refer to FIG. 24, which is a structural diagram of a texture layer provided by an example of the present disclosure. In FIG. 24, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are pentagons, the sizes of the plurality of protrusion bottom surfaces gradually decrease in the first array direction, and the distance between adjacent protrusions gradually increases. Refer to FIG. 25, which is a structural diagram of a texture layer provided by an example of the present disclosure. In FIG. 25, the shapes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions are hexagons, the sizes of the plurality of protrusion bottom surfaces gradually decrease in the first array direction, and the distance between adjacent protrusions gradually increases. In some examples of the present disclosure, the sizes of the plurality of protrusion bottom surfaces corresponding to the plurality of protrusions gradually decrease in the first array direction, and for every 1 cm of distance in the first array direction, the change in the sizes of the plurality of protrusion bottom surfaces is in the range of 0.1 μm to 100 μm.

[0052] In some examples of the present disclosure, the decorative substrate further includes a finishing layer including one or more of a color-developing layer, a matte layer, and a glitter layer. In an example of the present disclosure, the color-developing layer may be a coating layer or an ink layer as long as it has a certain color. In the present disclosure, the texture layer within the decorative film itself has a certain color effect, and by setting the color-developing layer, richer color variations can be achieved. By combining the color-developing layer and the texture layer, color changes of a single-color coating can be realized. The matte layer has a certain anti-slip function, with a softer visual effect, and can enrich the appearance of the product. The glitter layer refers to a finishing layer that can exhibit a glittering dot effect. In some examples, the glitter layer includes a coating doped with glitter particles, and by setting the glitter layer, a certain dazzling effect can be imparted to the decorative substrate. In some examples, the finishing layer is disposed on the surface of the texture layer. In some examples, the finishing layer is disposed on the surface of the substrate. In some examples, the finishing layer is disposed on the surfaces of the substrate and the texture layer.

[0053] In the decorative substrate provided by the present disclosure, the texture layer has a continuously changing characteristic structure, which can realize color changes of the decorative substrate at different angles. For example, when viewed from the front, it gradually changes from light purple to light yellow, and when viewed from the side, it gradually changes from light purple to light blue, showing a dynamic and three-dimensional color gradient effect, thus greatly improving the aesthetic appearance of the product.

[0054] The present disclosure also provides a method for preparing a decorated substrate. In an example of the present disclosure, the method for preparing a texture layer includes one or more of etching, UV transfer printing, and hot pressing. In some examples, the substrate includes a transparent film. For example, the substrate may be a polyester substrate (PET film), a polycarbonate substrate (PC film), or a polymethyl methacrylate substrate (PMMA film). The method for preparing the decorated substrate includes fabricating a texture master having a texture pattern on a mold according to the pattern of the texture layer, and transferring the texture master to the surface of the substrate to obtain a decorated substrate, and the obtained decorated substrate is a textured film sheet. In some examples, the base material includes a plastic sheet, and the method for preparing the decorated substrate includes transferring a texture master to the surface of the base material and hot press molding to obtain a decorated substrate, and the obtained decorated substrate is a textured plastic sheet. In some examples, the base material includes glass, and the method for fabricating the decorated substrate includes preparing a mask plate on the surface of the base material according to the pattern of the texture layer, etching the base material, and the etching effect is strong in the thin part of the mask plate and weak in the thick part of the mask plate, thereby forming a texture pattern on the surface of the base material to obtain a decorated substrate, and the obtained decorated substrate is textured glass. The method for preparing the decorated substrate provided in the present disclosure has mature technology, a simple process, and high product stability, can improve the product yield, and is suitable for mass production.

[0055] The present disclosure further provides a cover plate including the decorated substrate and the base body of the present disclosure. The base body is used to enhance the structural strength of the cover plate, and the base body may be one or more of plastic, metal, ceramic, or glass. The cover plate can exhibit a gradual effect of dynamic color change under different viewing angles, which greatly improves the aesthetics and has good market prospects. In some examples of the present disclosure, the cover plate can be used for the shell of a communication device, and the cover plate has a unique appearance and can improve the distinctiveness of the product.

[0056] The present disclosure further provides an electronic device including a cover plate. Referring to FIG. 26, which is a structural diagram of an electronic device according to an example of the present disclosure, the electronic device 200 includes a display component 201 and a housing 202, and the housing 202 includes the cover plate of the present disclosure. In an example of the present disclosure, the electronic device can be a mobile phone, a computer, a watch, a USB disk, an electronic cigarette, a wearable device, a digital camera, etc.

[0057] The following is a further description of the implementation of the present disclosure through specific examples.

[0058] Example 1 A decorative substrate, the preparation method of which includes transferring the pattern data of the texture layer to a computer, performing photolithographic exposure on a glass plate using a uniform photoresist, performing development, drying and plasma cleaning, performing UV transfer to transfer the texture to a PC sheet to obtain the decorative substrate. The decorative substrate is adhered to the surface of the glass plate through processes such as coating, printing, cutting, and bonding to obtain a glass cover plate having a texture pattern.

[0059] Please refer to FIG. 27, which is a top view of the decorative substrate according to Example 1 of the present disclosure. In FIG. 27, the texture layer on the surface of the decorative substrate has a plurality of protrusions. The shape of the bottom surface of the protrusion is a quadrilateral. The plurality of protrusions are arranged along a first array direction and a second array direction. The heights of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusion are the same. The projection point of the vertex of protrusion A1 on the bottom surface of the protrusion coincides with the center of the bottom surface of the protrusion. The projection point of the vertex of protrusion A2 on the bottom surface of the protrusion coincides with the vertex of the upper right corner of the quadrilateral of the bottom surface of the protrusion. The projection point of the vertex of protrusion A3 on the bottom surface of the protrusion coincides with the vertex of the upper right corner of the quadrilateral of the bottom surface of the protrusion. Starting from protrusion A1, in the first array direction, the projection points of the vertices of the plurality of protrusions on the bottom surface of the protrusion gradually deviate from the center of the bottom surface of the protrusion. That is, the distance between the projection point of the vertex of the plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion gradually becomes longer. Similarly, starting from protrusion A1, in the second array direction, the projection points of the vertices of the plurality of protrusions on the bottom surface of the protrusion gradually deviate from the center of the bottom surface of the protrusion. That is, the distance between the projection point of the vertex of the plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion gradually becomes longer.

[0060] Please refer to FIG. 28, which is an effect diagram of the decorative substrate according to Example 1 of the present disclosure. As can be seen from FIG. 28, the outer surface of the texture unit has a multi-stage structural change, and thus the color gradation is rich.

[0061] Example 2 A decorative substrate, the preparation method thereof includes transferring the pattern data of the texture layer to a computer, performing photolithographic exposure and development on a glass plate using a uniform photoresist, and forming a texture pattern on the surface of the photoresist. The glass plate with the photoresist is placed in a chemical liquid etching tank. Due to the protective effect of the photoresist on the glass, the thick adhesive part has a long etching resistance time, and the thin adhesive part has a short etching resistance time. The thin adhesive part flows out of the glass layer earlier than the thick adhesive part, so an uneven texture structure is formed. As a result, the texture is completely copied onto the glass surface, and a decorative substrate is formed.

[0062] Please refer to FIG. 29, which is a top view of the decorated substrate according to Example 2 of the present disclosure. In FIG. 29, the texture layer on the surface of the decorated substrate has a plurality of protrusions. The shape of the bottom surface of the protrusions is quadrilateral, and the plurality of protrusions are arranged along the first array direction and the second array direction. The projection point of the vertex of protrusion A1 on the bottom surface of the protrusion is located on the left side length of the quadrilateral on the bottom surface of the protrusion, and the projection point of the vertex of protrusion A2 on the bottom surface of the protrusion is located on the right side length of the quadrilateral on the bottom surface of the protrusion. Starting from protrusion A1, in the first array direction, the projection points of the vertices of the plurality of protrusions on the bottom surface of the protrusion gradually approach the center of the bottom surface of the first protrusion and then gradually deviate from the center of the bottom surface of the protrusion. That is, the distance between the projection point of the vertex of the plurality of protrusions on the bottom surface of the protrusion and the center of the bottom surface of the protrusion first gradually becomes shorter and then gradually becomes longer. In the second array direction, the structure of the plurality of protrusions is the same.

[0063] Please refer to FIG. 30, which is an effect diagram of the decorated substrate according to Example 2 of the present disclosure. As can be seen from FIG. 30, the outer surface of the texture unit has a multi-stage structural change, so the color gradation is rich.

[0064] Example 3 Regarding the decorated substrate, please refer to FIG. 31, which is a top view of the decorated substrate according to Example 3 of the present disclosure. In FIG. 31, the texture layer on the surface of the decorated substrate has a plurality of protrusions. The shape of the bottom surface of the protrusions is quadrilateral, and the plurality of protrusions are arranged along the first array direction and the second array direction. The projection positions of the vertices of the plurality of protrusions on the bottom surface of the protrusion are the same. Among them, let the height of the vertex of protrusion A1 with respect to the bottom surface of the protrusion be h1, the height of the vertex of protrusion A2 with respect to the bottom surface of the protrusion be h2, and the height of the vertex of protrusion A3 with respect to the bottom surface of the protrusion be h3. Then h1>h2 and h1>h3. Starting from protrusion A1, in the first array direction, the height of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusion first gradually increases and then gradually decreases. In the second array direction, starting from protrusion A1, the height of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusion gradually decreases.

[0065] Please refer to FIG. 28, which is an effect diagram of the decorated substrate provided in Example 1 of the present disclosure. As can be seen from FIG. 28, the outer surface of the texture unit has multi-stage structural changes, and thus has rich color gradation.

[0066] Example 4 Regarding the decorated substrate, please refer to FIG. 32, which is a top view of the decorated substrate provided in Example 4 of the present disclosure. In FIG. 32, the texture layer on the surface of the decorated substrate has a plurality of protrusions. The shape of the bottom surface of the protrusions is quadrilateral. The plurality of protrusions are arranged along the first array direction and the second array direction, and the projection positions of the vertices of the plurality of protrusions on the bottom surface of the protrusions are the same. Among them, if the height of the vertex of protrusion A1 with respect to the bottom surface of the protrusion is h1, the height of the vertex of protrusion A2 with respect to the bottom surface of the protrusion is h2, and the height of the vertex of protrusion A3 with respect to the bottom surface of the protrusion is h3, then h2>h1 and h2>h3. Starting from protrusion A1, in the first array direction, the height of the vertices of the plurality of protrusions with respect to the bottom surface of the protrusion first gradually increases and then gradually decreases. In the second array direction, the structures of the plurality of protrusions are the same.

[0067] Please refer to FIG. 30, which is an effect diagram of the decorated substrate provided in Example 2 of the present disclosure. As can be seen from FIG. 30, the outer surface of the texture unit has multi-stage structural changes, and thus has rich color gradation.

[0068] The above examples only represent an example of the present disclosure. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present disclosure. Those skilled in the art should note that without departing from the design concept of the present disclosure, some modifications and improvements can be made, and all of these are within the scope of the present disclosure. Therefore, the scope of the present disclosure is defined by the appended claims.

Claims

1. A decorative substrate (100) comprising a base material (20) and a texture layer (10) disposed on the surface of the base material (20), wherein a plurality of protrusions (11) are arranged in an array in the texture layer (10), and the first direction (X) is any direction in the plane where the texture layer (10) is located. Each of the protrusions (11) has a protrusion bottom surface (112) and a vertex (111), and in the first direction (X), the distance (d) between the projection point (H) of the vertex (111) of the plurality of protrusions (11) on the protrusion bottom surface (112) and the center (O) of the protrusion bottom surface (112) gradually changes, and / or In the first direction (X), the height (h) of the vertex (111) of the plurality of protrusions (11) with respect to the protrusion bottom surface (112) gradually changes. The decorative substrate (100).

2. The height of the vertex (111) of the plurality of protrusions (11) with respect to the protrusion bottom surface (112) gradually changes in the first direction (X), and for every 1 cm of distance in the first direction (X), the change in the height of the vertex (111) of the plurality of protrusions (11) with respect to the protrusion bottom surface (112) is in the range of 0.2 μm to 6 μm. The decorative substrate (100) according to Claim 1.

3. The shape of each protrusion bottom surface (112) includes any one of a polygon or a circle. In the first direction (X), the distance (d) between the projection point (H) of the vertex (111) of the plurality of protrusions (11) on the protrusion bottom surface (112) and the center (O) of the protrusion bottom surface (112) gradually changes. For every 1 cm of distance in the first direction (X), the change in the distance (d) between the projection point (H) of the vertex (111) of the plurality of protrusions (11) on the protrusion bottom surface (112) and the center (O) of the protrusion bottom surface (112) is in the range of 1 μm to 200 μm. The decorative substrate (100) according to Claim 1.

4. The distance (d5) between adjacent protrusions (11) is in the range of 1 μm to 10 mm, and the shape of the protrusion bottom surface (112) is circular and the radius of the protrusion bottom surface (112) is in the range of 1 μm to 10 mm, or the shape of the protrusion bottom surface (112) is polygonal and the radius of the circumscribed circle (110) of the protrusion bottom surface (112) is in the range of 1 μm to 10 mm. The decorative substrate (100) according to Claim 1.

5. The shape of the bottom surface (112) of the protrusion is circular, and the ratio of the radius of the bottom surface (112) of the protrusion to the distance (d5) between adjacent protrusions (11) is (2 to 3):1, or the shape of the bottom surface (112) of the protrusion is polygonal, and the ratio of the radius of the circumscribed circle (110) of the bottom surface (112) of the protrusion to the distance (d5) between adjacent protrusions (11) is (2 to 3):

1. The decorated substrate according to claim 1.

6. The height (h) of the apex (111) of the protrusion with respect to the bottom surface (112) of the protrusion is in the range of 0.1 μm to 20 μm. The decorated substrate (100) according to claim 1.

7. The shape of the bottom surface (112) of the protrusion is circular, and the radii of a plurality of bottom surfaces (112) of the protrusion gradually change in the second direction (Y), or the shape of the bottom surface (112) of the protrusion is polygonal, and the radii of the circumscribed circles (110) of the plurality of bottom surfaces (112) of the protrusion gradually change in the second direction (Y), and the second direction (Y) is any direction in the plane where the texture layer (10) is located. The decorated substrate (100) according to claim 1.

8. The shape of the bottom surface (112) of the protrusion is polygonal, and a plurality of bottom surfaces (112) of the protrusion have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, and the plurality of bottom surfaces (112) of the protrusion have a relative rotation angle that gradually changes with respect to the first array direction or the second array direction. The decorated substrate (100) according to claim 1.

9. The side surface of the protrusion (11) is any one of a flat surface, a straight surface, or a curved surface. The decorated substrate (100) according to claim 1.

10. The apexes (111) of the plurality of protrusions (11) are connected at the projection point (H) of the bottom surface (112) of the protrusion to form an arrangement path of the apexes (111) of the protrusions (11) in the first direction (X), and the arrangement path includes a straight path and / or a curved path. The decorated substrate (100) according to claim 1.

11. The first array direction is defined as the array direction of the plurality of protrusions (11), the shape of the bottom surface (112) of the protrusion is quadrilateral, and in the first array direction, the projection points (H) of the apexes (111) of the plurality of protrusions (11) on the bottom surface (112) of the protrusion are arranged in order along the diagonal of the quadrilateral. The decorated substrate (100) according to claim 10.

12. The first array direction is defined as the array direction of the plurality of protrusions (11), the shape of the bottom surface (112) of the protrusion is a quadrilateral, and in the first array direction, the projection points (H) of the vertices (111) of the plurality of protrusions (11) on the bottom surface (112) of the protrusion are arranged in order along a predetermined line segment (l1), and the predetermined line segment (l1) is a line segment parallel to the side length (113) of the quadrilateral. The decorative substrate (100) according to claim 10.

13. The projection points (H) of the vertices (111) of the plurality of protrusions (11) on the bottom surface (112) of the protrusion are located on the same axis passing through the center (O) of the bottom surface (112) of the protrusion in the first direction (X). The decorative substrate (100) according to claim 10.

14. The axis is a symmetry axis of the bottom surface (112) of the protrusion or a line segment passing through the center (O) of the bottom surface (112) of the protrusion, and the line segment is a line connecting any two points on the circumference of the bottom surface (112) of the protrusion. The decorative substrate (100) according to claim 13.

15. The plurality of bottom surfaces (112) of the protrusions have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, and the size of the bottom surfaces (112) of the plurality of protrusions (11) gradually decreases in the first array direction and / or the second array direction, and the distance (d5) between adjacent protrusions (11) gradually increases. The decorative substrate (100) according to claim 1.

16. The plurality of bottom surfaces (112) of the protrusions have a first array direction and a second array direction, the first array direction is perpendicular to the second array direction, and in the first array direction, the size of the plurality of bottom surfaces (112) of the plurality of protrusions (11) gradually decreases, and for every 1 cm in the first array direction, the change in the size of the plurality of bottom surfaces (112) of the plurality of protrusions (11) is in the range of 0.1 μm to 100 μm. The decorative substrate (100) according to claim 1.

17. The decorative substrate further includes a finishing layer, the finishing layer includes one or more of a color developing layer, a matte layer, and a brightening layer, and the finishing layer is disposed on the surface of the texture layer (10) and / or the substrate (20). The decorative substrate (100) according to claim 1.

18. A method for preparing a decorative substrate (100), A step of forming a texture layer (10) on the surface of a substrate (20) to obtain a decorative substrate (100), the method for preparing the texture layer (10) including one or more of transfer printing, etching, and hot press forming, and a plurality of protrusions (11) arranged in an array are provided on the surface of the texture layer (10), the first direction (X) being any direction in the plane where the texture layer (10) is located. The protrusion (11) has a protrusion bottom surface (112) and a vertex (111), and in the first direction (X), the distance (d) between the projection point (H) of the vertex (111) of the plurality of protrusions (11) on the protrusion bottom surface (112) and the center (O) of the protrusion bottom surface (112) gradually changes. And / or, in the first direction (X), the height (h) of the vertex (111) of the plurality of protrusions (11) with respect to the protrusion bottom surface (112) gradually changes.

19. A cover plate comprising the decorative substrate according to any one of claims 1 to 17 and a base body, the decorative substrate being disposed on the surface of the base body.

20. An electronic device (200) comprising the cover plate according to claim 19.

Images