Decorative plate, method for manufacturing the same, and electronic device

Abstract

The present application provides a decorative plate, a method for manufacturing the same, and an electronic device, the decorative plate comprising a substrate having a texture layer disposed on one surface thereof, the texture layer comprising a plurality of regions, at least the plurality of regions exhibiting variations in brightness, at least some of the regions comprising a plurality of texture units, each texture unit comprising a plurality of aligned protrusions, each protrusion comprising a pyramid or a truncated pyramid.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application No. 202210959229.2, filed on August 10, 2022, and entitled "DECORATIVE PLATE, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of decorative technology, and in particular to a decorative plate, a method for making the same, and an electronic device. [Background technology]

[0003] With the rapid development of electronic devices, people's demands for visual effects in the appearance of electronic devices are increasing. However, existing electronic devices have a relatively simple decorative appearance, monotonous texture, and insufficient appearance expressiveness, especially the monotonous changes in light and shadow effects, which cannot meet consumer demand. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of this, the present disclosure provides a decorative plate. The alignment of the protruding structures on the texture layer of the decorative plate can cooperate with each other to refract and reflect light at different angles and intensities, thereby applying multiple light and shadow reflection effects to the light source, so that the decorative plate can present a gradual depth of field. In addition, the texture layer has multiple regions with different brightness, which ultimately allows the decorative plate to present a gradual depth of field with alternating light and dark, providing a rich visual effect and a higher aesthetic appearance. [Means for solving the problem]

[0005] A first aspect of the present disclosure provides a decorative plate, the decorative plate including a substrate and a texture layer disposed on one side of the substrate, the texture layer including a plurality of regions, at least the plurality of regions exhibiting variations in brightness, at least some of the regions including a plurality of texture units, each of the texture units including a plurality of protrusions arranged in an aligned manner, the protrusions including pyramids or frustums.

[0006] In one of the texture units, each of the protrusions arranged along the first direction has a first side and a second side arranged on opposite sides and parallel to the first direction, the plurality of first side surfaces arranged adjacent to each other form a first reflective surface of a first blazed diffraction grating subunit, the plurality of second side surfaces arranged adjacent to each other form a second reflective surface of the first blazed diffraction grating subunit, and the plurality of first blazed diffraction grating subunits form a first blazed diffraction grating.

[0007] In one of the texture units, each of the protrusions arranged along the second direction has a third side and a fourth side arranged on opposite sides and parallel to the second direction, the plurality of third side surfaces arranged adjacent to each other form a third reflective surface of a second blazed diffraction grating subunit, the plurality of fourth side surfaces arranged adjacent to each other form a fourth reflective surface of the second blazed diffraction grating subunit, the plurality of second blazed diffraction grating subunits form a second blazed diffraction grating, and the first direction and the second direction are different.

[0008] For each texture unit, when a light source illuminates the decorative plate from a specific angle, the protrusions can cooperate with each other, and the two sets of blazed diffraction gratings formed by the protrusions refract and reflect the light at different angles and intensities, thereby applying multiple light and shadow reflection effects to the light source. Each texture unit not only exhibits a gradient depth-of-field effect like a kaleidoscope, but also exhibits a "light" or "dark" visual effect. In addition, the light and dark effect exhibited by the texture unit can be changed by changing the extension direction of the blazed diffraction grating in the texture unit or by changing the shape of the protrusions. By arranging texture units with different light and dark effects at different positions on the substrate, areas with different brightness can be formed on the decorative plate. These areas can also form specific patterns, which further enhance the appearance of the decorative plate and improve its market competitiveness.

[0009] A second aspect of the present disclosure provides a method for producing a cellular membrane comprising the steps of: (1) patterns corresponding to a first blazed diffraction grating and a second blazed diffraction grating having different extension directions are designed, the first blazed diffraction grating includes a plurality of first blazed diffraction grating subunits arranged in parallel along a first direction, and the second blazed diffraction grating includes a plurality of second blazed diffraction grating subunits arranged in parallel along a second direction; the first blazed diffraction grating and the second blazed diffraction grating are superimposed to form intersections between any of the first blazed diffraction grating subunits and any of the second blazed diffraction grating subunits; the intersections are deformed to ensure that any one of the intersections is independently a protrusion, the protrusion comprising a pyramid or a frustum; and a unit pattern is obtained; (2) A texture pattern of a decorative plate is designed, the texture pattern is divided into a plurality of regions, and at least some of the regions are divided into a plurality of pattern units, and each of the pattern units is filled with a unit pattern so as to ensure that the brightness of at least a plurality of regions in the texture pattern is different and the brightness of the pattern units in a single region is similar, thereby obtaining a pattern file; (3) A texture layer corresponding to the filled texture pattern is formed on the surface of the substrate according to the pattern file to obtain a decorative plate according to the first embodiment of the present disclosure. The present invention provides a method for producing a decorative plate, comprising:

[0010] The fabrication method described above is highly controllable, can obtain decorative plates with different visual effects through flexible variation of parameters, is simple to process, and is suitable for large-scale industrial production.

[0011] According to a third aspect of the present disclosure, there is provided an electronic device including the decorative plate according to the first aspect of the present disclosure, which has an attractive appearance effect, which can improve the appearance and product competitiveness of the electronic device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a grayscale view of a decorative plate according to an example of the present disclosure. [Figure 2A] FIG. 10 is a grayscale view of a decorative plate according to another example of the present disclosure from a first viewing angle. [Figure 2B] FIG. 10 is a grayscale view of a decorative plate according to another example of the present disclosure from a second viewing angle. [Figure 2C] FIG. 10 is a grayscale view of a decorative plate according to another example of the present disclosure from a third viewing angle. [Figure 3] FIG. 1 is a schematic diagram of the structure of a typical blazed diffraction grating. [Figure 4]1 is a schematic diagram of a cross-sectional structure of a decorative plate according to an example of the present disclosure. [Figure 5] 1 is a schematic diagram of a cross-sectional structure along a first direction of a texture unit of a decorative plate according to one example of the present disclosure. [Figure 6] FIG. 2 is a top view of a partial structure of a texture unit of a decorative plate according to an example of the present disclosure. [Figure 7] FIG. 7 is a partially enlarged schematic diagram of the structure of FIG. 6. [Figure 8] A top view of a first blazed diffraction grating in a texture unit of a decorative plate according to an example of the present disclosure. [Figure 9] A top view of a second blazed diffraction grating in a texture unit of a decorative plate according to an example of the present disclosure. [Figure 10] 1 is a schematic diagram of a first blazed diffraction grating subunit and a second blazed diffraction grating subunit in a texture unit of a decorative plate according to one example of the present disclosure. FIG. [Figure 11] 1 shows the relationship between the extension direction of a single blazed diffraction grating and the corresponding brightness. [Figure 12] This is a schematic diagram of the relative positional relationship between a single blazed diffraction grating, a unit pattern obtained by overlapping two blazed diffraction gratings, and a light source. [Figure 13] 1 illustrates the relationship between the cross-sectional shape of a single grating subunit of a single blazed grating and the corresponding brightness. [Figure 14A] FIG. 1 is a schematic diagram illustrating the principle of light reflection by a single grating subunit of a single blazed grating. [Figure 14B] 1A and 1B are cross-sectional views of grating subunits of two different blazed gratings. [Figure 14C] A front view of a protrusion in a texture unit of a decorative plate viewed from a first direction according to an example of the present disclosure. [Figure 15] A schematic diagram of the cross-sectional structure along the first direction of a texture unit of a decorative plate according to Example 4 of the present disclosure. [Figure 16] FIG. 10 is a grayscale diagram of a decorative plate according to Example 5 of the present disclosure.

[0013] 100 decorative plates 10 Substrate 20 Texture Layers 30 areas 40 texture units 50 Protrusion 60 First blazed diffraction grating 61 First blazed grating subunit 611 First Reflecting Surface 612 Second Reflective Surface 70 Second blazed diffraction grating 71 Second blazed grating subunit 711 Third Reflective Surface 712 Fourth Reflective Surface DETAILED DESCRIPTION OF THE INVENTION

[0014] With the rapid development of electronic devices, consumers may tend to choose products with attractive appearances when selecting products, and products with light-shadow variations are particularly popular with the majority of consumers. However, the industry currently relies on changing the orientation of the same blazed diffraction grating at different positions on the exterior to achieve overall light-shadow variations on the exterior. The exterior patterns are often too simple and lack texture.

[0015] The structure of a typical blazed diffraction grating will be briefly introduced below with reference to FIG. 3. A blazed diffraction grating has multiple diffraction grating subunits arranged in parallel, and each diffraction grating subunit has two intersecting reflective surfaces. It can be seen that when the angle between the reflective surface and the base surface of the blazed diffraction grating is changed, the reflective surfaces at different angles will exhibit different refractive and reflective effects on light. When a light source illuminates the surface of a blazed diffraction grating, the more light is reflected by the reflective surface to the human eye, the brighter the reflective surface will appear, and vice versa.

[0016] Under the same incident light angle, the angle α between the reflective surface and the incident light determines how much reflected light the human eye can receive. The larger the value of α (α is greater than or equal to 90°), the less light is reflected to the human eye, and the reflective surface appears darker; the smaller the value of α, the brighter the reflective surface appears.

[0017] Based on the above principle, to solve the problem of the relatively single light-shadow effect on the appearance of electronic devices in the current market, an example of the present disclosure provides a decorative plate.

[0018] Specifically, referring to Figures 1 to 2C and Figures 4 to 10, one example of the present disclosure provides a decorative plate 100 including a substrate 10, wherein a texture layer is disposed on one side of the substrate (see Figure 4), the texture layer 20 includes a plurality of regions 30, at least the plurality of regions 30 exhibiting variations in brightness, at least some of the regions 30 include a plurality of texture units 40 (see Figure 1), each of the texture units 40 includes a plurality of protrusions 50 arranged in an aligned manner (see Figure 5), the protrusions 50 include pyramids or frustums, and it can be understood that some regions include only one texture unit 40.

[0019] 6 to 10, in one texture unit 40, each of the protrusions 50 arranged along the first direction X has a first side a and a second side b arranged on opposite sides and parallel to the first direction X, and the multiple first side faces a arranged adjacent to each other form a first reflecting surface 611 of a first blazed diffraction grating subunit 61, and the multiple second side faces b arranged adjacent to each other form a second reflecting surface 612 of the first blazed diffraction grating subunit 61, and the multiple first blazed diffraction grating subunits 61 form a first blazed diffraction grating 60.

[0020] In one texture unit 40, each of the protrusions 50 arranged along the second direction Y has a third side c and a fourth side d arranged on opposite sides and parallel to the second direction Y, and the multiple third side faces c arranged adjacent to each other form a third reflective surface 711 of the second blazed diffraction grating subunit 71, and the multiple fourth side faces d arranged adjacent to each other form a fourth reflective surface 712 of the second blazed diffraction grating subunit 71, and the multiple second blazed diffraction grating subunits 71 form a second blazed diffraction grating 70, and the first direction X and the second direction Y are different.

[0021] The relative positions of each protrusion 50 and each blazed diffraction grating are described in more detail below. Each texture unit 40 includes a first blazed diffraction grating 60 and a second blazed diffraction grating 70 arranged non-parallel. Each blazed diffraction grating has multiple diffraction grating subunits, each of which has two reflective surfaces at a specific angle. Referring to FIG. 7 , the texture unit 40 includes a first protrusion 41 and a third protrusion 43 arranged side by side along a first direction X. The first protrusion 41 has a first side surface 1 a and a second side surface 1 b arranged on opposite sides and parallel to the first direction X, and the third protrusion 43 has a first side surface 3 a and a second side surface 3 b arranged on opposite sides and parallel to the first direction X. The first reflective surface of the first blazed grating subunit is formed by arranging adjacent first side surfaces 1a and 3a, and the second reflective surface is formed by arranging adjacent second side surfaces 1b and 3b. Similarly, the texture unit 40 includes a first protrusion 41 and a second protrusion 42 arranged side by side along the second direction Y. The first protrusion 41 has a third side surface 1c and a fourth side surface 1d arranged on opposite sides and parallel to the second direction Y. The second protrusion 42 has a third side surface 2c and a fourth side surface 2d arranged on opposite sides and parallel to the second direction Y. The first reflective surface of the second blazed grating subunit is formed by arranging adjacent third side surfaces 1c and 2c, and the second reflective surface is formed by arranging adjacent fourth side surfaces 1d and 2d. The texture unit 40 further includes a fourth protrusion 44. The second protrusion 42 and the fourth protrusion 44 are arranged side by side along the first direction X, and the third protrusion 43 and the fourth protrusion 44 are arranged side by side along the second direction Y. The fourth protrusion 44 has a first side 4a and a second side 4b arranged on opposite sides and parallel to the first direction X, and a third side 4c and a fourth side 4d arranged on opposite sides and parallel to the second direction Y.The first reflective surface of the first blazed grating subunit is formed by arranging adjacent first side surfaces 2a and 4a, and the second reflective surface is formed by arranging adjacent second side surfaces 2b and 4b. The first reflective surface of the second blazed grating subunit is formed by arranging adjacent third side surfaces 3c and 4c, and the second reflective surface is formed by arranging adjacent fourth side surfaces 3d and 4d. In other words, the reflective surface of each blazed grating is a sawtooth plane consisting of multiple pyramids or frustums (see Figures 8 and 9).

[0022] In the present disclosure, the side surface of the protrusion 50 parallel to the first direction X or the second direction Y particularly means that the bottom edge of the side surface is parallel to the first direction X or the second direction Y.

[0023] The protrusions 50 are arranged in alignment on each texture unit 40, and the sides of adjacent protrusions 50 may be surrounded by an inverted pyramid, thereby forming a kaleidoscope-like gradual depth of field effect on each texture unit 40. Again, the mutual cooperation between the protrusions 50 may form two sets of crossed blazed diffraction gratings, each of which has four sets of reflective surfaces with different angles. When a light source illuminates the surface of the decorative plate 100, the four sets of staggered reflective surfaces refract and reflect the light at different angles and intensities, thereby allowing the texture unit 40 to present a "light" or "dark" visual effect, and the gradual depth of field effect described above may be further enhanced. Based on this, by changing the extension direction of the blazed diffraction grating in the texture unit 40 (i.e., by changing the first direction X and / or the second direction Y) or by changing the angle between each reflective surface and the substrate 10 (i.e., the angle between the side of the protrusion 50 and the substrate 10), the texture unit 40 can present different light and dark effects. Therefore, by arranging texture units 40 with different lightness in specific areas of the decorative plate 100 and controlling the light and dark effects of all texture units 40 in a specific area to be similar, areas 30 with different lightness can be obtained, and the multiple areas 30 can form a specific pattern in the decorative plate 100, further enhancing the visual effect of the decorative plate 100.

[0024] Furthermore, when a user changes the viewing angle (i.e., changes the light source direction), the angle between each reflective surface of the texture unit 40 and the direction of light incidence also changes, changing the light and dark effect presented by each texture unit 40. The brightness and darkness of each region 30 may also change accordingly. Furthermore, when a user rapidly changes the viewing angle, the decorative plate 100 can present an alternating flow of light and dark (see FIGS. 2A-2C) with a very rich visual effect. Because each texture unit simultaneously contains two sets of blazed diffraction gratings, it can be seen that for each texture unit, the texture unit 40 presents a relatively high brightness and a relatively low darkness across at least two viewing angles. Accordingly, this change is reflected in the brightness and darkness fluctuations of the region 30, which also greatly enhances the user's experience.

[0025] FIG. 11 shows the brightness and darkness effects corresponding to different extension directions of a single blazed diffraction grating. When the extension direction of the single blazed diffraction grating is perpendicular to the illumination direction of the light source, the blazed diffraction grating exhibits a bright state under the light source. When the extension direction of the single blazed diffraction grating is parallel to the illumination direction of the light source, the blazed diffraction grating exhibits a darkest state under the light source. A detailed explanation of the principle of the correspondence between the direction of the light source (i.e., the user's viewing direction) and the extension direction of the blazed diffraction grating will be provided below with reference to FIG. 12. Blazed diffraction grating A and the second blazed diffraction grating have the general structure shown in FIG. 3. The first blazed diffraction grating exhibits the brightest visual effect under light source 1 and the darkest visual effect under light source 2. The second blazed diffraction grating exhibits the brightest visual effect under light source 3 and the darkest visual effect under light source 4. By overlapping and combining the first and second blazed diffraction gratings, a unit pattern is obtained, and when the light source is moved between Light Source 1 and Light Source 3 (rotating clockwise from Light Source 1 to Light Source 3, or rotating counterclockwise from Light Source 3 to Light Source 1), the unit pattern exhibits a brighter visual effect. Similarly, when the light source is moved between Light Source 2 and Light Source 4, the unit pattern exhibits a brighter visual effect. When the light source is changed in other angle ranges, the unit pattern exhibits a relatively darker visual brightness. 8, 9, and 12, it can be seen that the above principle corresponds to the first blazed diffraction grating 60 and the second blazed diffraction grating 70, where the first blazed diffraction grating 60 exhibits high brightness under light source 1 and darkest brightness under light source 2, and the second blazed diffraction grating 70 exhibits high brightness under light source 3 and darkest brightness under light source 4. Thus, by combining the first blazed diffraction grating 60 with the second blazed diffraction grating 70, the texture unit 40 can exhibit a high brightness state at two light source angles and a darkest state at two light source angles. As this changes between the above directions, the brightness state gradually changes between the high brightness state and the darkest state.Furthermore, when the angle between the reflective surfaces of the first blazed diffraction grating 60 and the second blazed diffraction grating 70 and the substrate 10 changes, this directly changes the angle between the reflective surfaces and the incident light source, affecting the brightness state.

[0026] Even under the same light source (i.e., the same viewing angle), the angle between the reflective surface of a single blazed diffraction grating and the substrate (i.e., the cross-sectional shape of the blazed diffraction grating) significantly affects the visual brightness of the blazed diffraction grating. The principle is explained below by combining common blazed diffraction gratings. Referring to Figures 3, 5, and 13-14B, Figure 3 shows a common blazed diffraction grating structure, and Figure 13 shows the relationship between the cross-sectional shapes of grating subunits of blazed diffraction gratings with different extension directions and cross-sectional shapes under the same light source and the corresponding bright and dark visual effects. Figure 14A shows the relationship between the reflective surface of the grating subunit and the incident light source. Blazed diffraction gratings C and D are also common blazed diffraction grating structures as shown in Figure 3. The cross-section of one grating subunit of blazed diffraction grating C is denoted as C1, and the angles between the two reflective surfaces corresponding to the two side edges of C1 and the substrate 10 are γ1 and γ2, respectively. The cross section of one grating subunit of blazed diffraction grating D is denoted as D1, and the angles between the two reflective surfaces corresponding to the two side edges of D1 and the substrate 10 are γ3 and γ4, respectively. γ is the minimum of γ1 and γ2, and γ' is the minimum of γ3 and γ4. When γ<γ', it is defined that the brightness of blazed diffraction grating C is lower than that of blazed diffraction grating D.

[0027] 1, 8, 9, and 14C, the first blazed diffraction grating 60 and the second blazed diffraction grating 70 in the present disclosure differ from typical blazed diffraction gratings only in that their reflective surfaces are sawtooth planes. They are formed by aligned protrusions 50. The cross-sectional shapes of the grating subunits described above correspond to the front-view shapes of the protrusions 50 when viewed from the first direction X or the second direction Y in the present disclosure. It can be seen that the brightness change of the texture unit 40 is also affected by the shapes of the protrusions 50. Referring to FIG. 14C, two protrusions are viewed from the first direction X, and the front-view shapes of the protrusions are E1 and E2, respectively. The angles between the two side surfaces of the protrusions corresponding to the side edges of E1 and the substrate 10 are θ1 and θ2, respectively. The angles between the two side surfaces of the protrusion corresponding to the side edges of E2 and the substrate 10 are θ3 and θ4, respectively. θ is the minimum value of θ1 and θ2, and θ' is the minimum value of θ3 and θ4. When θ<θ', it is defined that the brightness of the protrusion corresponding to E1 is lower than the brightness of the protrusion corresponding to E2 from a certain angle. Similarly, when the protrusions E1 and E2 are viewed from the second direction Y, the front view shape in the second direction Y also affects the brightness of the protrusions at other angles. Thus, the overall lighting effect of the protrusions 50 is significantly affected by the shape of the protrusions 50. Generally, the front view shape of each protrusion 50 viewed from the first direction X or the second direction Y is a triangle or a trapezoid, or a deformed triangle or trapezoid. Taking a triangle as an example, if the base edges of each triangle are the same width, the greater the height of the triangle, the darker the visual effect. If the triangles are of equal height, the wider the base edges of the triangles, the darker the visual effect.

[0028] In some examples of the present disclosure, the multiple protrusions 50 in a single texture unit 40 are uniform in shape.

[0029] It can be seen that the shape of the protrusions 50 in each texture unit 40 can be kept uniform, and by controlling the extension direction of each blazed diffraction grating, the texture layer 20 can be divided into multiple regions 30 with different brightnesses. Alternatively, the extension direction of the blazed diffraction grating in each texture unit 40 can be kept uniform, and by controlling the shapes of the protrusions 50 to be different, the texture layer 20 can be divided into multiple regions 30 with different brightnesses. Of course, by simultaneously controlling the extension direction of the blazed diffraction grating and the shape of the protrusions 50, the light and shadow effect on the surface of the decorative plate 100 can be further enhanced, and the aesthetics of the decorative plate 100 can be greatly improved.

[0030] 1 and 8 to 10, in some examples of the present disclosure, a first region A and a second region B are defined as any two adjacent regions 30, and at least the first reflecting surfaces 611 and second reflecting surfaces 612 of some of the first blazed diffraction gratings 60 and / or the third reflecting surfaces 711 and fourth reflecting surfaces 712 of some of the second blazed diffraction gratings 70 in the first region A have an extension direction different from the extension direction of the second region B, and / or the orthogonal projection shape of at least one of the first reflecting surfaces 611, second reflecting surfaces 612, third reflecting surfaces 711, and fourth reflecting surfaces 712 on the substrate 10 is different from the shape of the second region B. When a user views the decorative plate 100 from a certain angle (i.e., a light source illuminates the decorative plate 100 from a certain direction), the extension direction of each reflective surface and the orthogonal projection shape of the reflective surface on the substrate 10 may significantly affect the brightness of the region. Different arrangement directions of the protrusions 50 arranged in different predetermined regions (i.e., different extension directions of the first blazed diffraction grating 60 and / or the second blazed diffraction grating 70) or different shapes of the protrusions 50 (orthogonal projection shapes of the reflective surface on the substrate 10) can result in different brightness in different predetermined regions, and ultimately, regions with different brightness may be divided.

[0031] In the present disclosure, the shape of region 30 may be regular or irregular, for example, it may be a circle, annulus, rectangle, irregular shape, etc.

[0032] In this disclosure, for convenience, the length direction of the decorative plate 100 is defined as the predetermined direction. In the same texture unit 40, the angles between the first blazed diffraction grating 60 and the second blazed diffraction grating 70 and the predetermined direction are not the same.

[0033] In some examples of the present disclosure, there are at least some regions 30, and the extension direction of the first blazed diffraction grating or the second blazed diffraction grating in a single region 30 (i.e., the first direction X or the second direction Y of the texture unit 40) is parallel to the predetermined direction, and there are at least some regions 30, and the extension direction of the first blazed diffraction grating or the second blazed diffraction grating in a single region 30 is perpendicular to the predetermined direction. In this case, when a user observes the workpiece, the surface of the decorative plate 100 has the brightest region 30 and the darkest region 30, thereby making the alternating light and dark effect of the decorative plate 100 most obvious.

[0034] Referring to FIG. 11, the region 30 includes a first portion M1, a second portion M2, and a third portion M3. In some examples of the present disclosure, there are at least some regions 30, and the angle between the extension direction of the first blazed diffraction grating and / or the second blazed diffraction grating in a single region 30 and the predetermined direction is within a range of −30° to 30° (referred to as a first portion M1); there are at least some regions 30, and the angle between the extension direction of the first blazed diffraction grating and / or the second blazed diffraction grating in a single region 30 and the predetermined direction is within a range of 60° to 90° and / or −90° to −60° (referred to as a second portion M2); and there are at least some regions 30, and the angle between the extension direction of the first blazed diffraction grating and / or the second blazed diffraction grating in a single region 30 and the predetermined direction is within a range of −60° to −30° and / or 30° to 60° (referred to as a third portion M3). 11, when the angle between the blazed diffraction grating and the predetermined direction is within the range of -30° to 30°, region 30 is clearly a high-brightness region when the decorative plate 100 is viewed from a direction perpendicular to the predetermined direction (the light source direction is perpendicular to the predetermined direction). When the angle between the extension direction of the blazed diffraction grating and the predetermined direction is within the range of 60° to 90° and / or -90° to -60°, region 30 is clearly a dark region. When the angle between the extension direction of the blazed diffraction grating and the predetermined direction is within the range of -60° to -30° and / or 30° to 60°, region 30 is a transition region whose brightness is between the above two. A texture layer 20 having regions with the above three brightness expressions simultaneously can create a more comprehensive light and dark effect on the surface of the decorative plate 100.

[0035] In some examples of the present disclosure, the third portion M3 is disposed between the first portion M1 and the second portion M2, so that the surface of the decorative plate 100 simultaneously has a bright area, a dark area, and a transition area therebetween, which can make the transition between light and dark on the surface of the decorative plate 100 more natural and beautiful.

[0036] In some examples of the present disclosure, in at least some of the texture units, the extension direction of the first blazed diffraction grating forms an angle β with the extension direction of the second blazed diffraction grating in a single texture unit (i.e., the angle between the first direction X and the second direction Y), where the angle β is within a range of 30° to 120°. Controlling the angle β within this range may significantly reduce the risk of Moiré patterns in the texture layer 20, and the effect exhibited by the texture layer 20 may further exhibit the combined effect of the first blazed diffraction grating 60 and the second blazed diffraction grating 70.

[0037] In some examples of the present disclosure, there are at least some regions 30, and the γ and / or θ of each protrusion 50 in a single region 30 is within the range of more than 0° and not more than 30°; there are at least some regions 30, and the γ and / or θ of each protrusion 50 in a single region 30 is within the range of 30° to 60°; there are at least some regions 30, and the γ and / or θ of each protrusion 50 in a single region 30 is within the range of 60° to 80°. In this case, the light and dark effects on the surface of the decorative plate 100 are relatively rich.

[0038] In some examples of the present disclosure, the protrusions on at least some of the texture units 40 are closely spaced.

[0039] In another example of the present disclosure, the protrusions in at least some of the texture units 40 are spaced apart, and the separation distance between adjacent protrusions 50 is significantly smaller than the minimum lateral size of the base of the protrusions 50, so that insufficient continuity between the grating subunits of the blazed grating can be avoided, and insufficient continuity of the reflective surface can be avoided, thereby effectively ensuring the light-shadow fluctuation effect of each texture unit 40, and thus sufficiently ensuring the light-shadow fluctuation effect of the decorative plate 100.

[0040] In some examples of the present disclosure, the height of the protrusions 50 is within a range of 0.1 μm to 20 μm. For example, the height of the protrusions 50 may be 0.1 μm, 0.5 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, etc. The decorative plate 100's gradual depth of field light-shadow effect can be better realized, a more comfortable feel can be provided to the decorative plate 100, and the contact area between a person's hand and the surface of the workpiece can be reduced, thereby preventing hand sweat and fingerprints and maintaining its luxurious appearance over a long period of use. It should be noted that in the present disclosure, the height of the protrusion 50 refers to the difference in height between the highest point of the protrusion 50 and the plane of the substrate 10, i.e., the size of the protrusion 50 in a direction perpendicular to the plane of the substrate 10. Specifically, with reference to Fig. 5, the distance from the highest point of the cross section of the protrusion 50 in the direction perpendicular to the plane of the substrate 10 to the plane of the substrate 10 is the height h of the protrusion 50, and the height h can also be calculated from the difference in height between the highest point and the lowest point of the cross section.

[0041] 10 , in some examples of the present disclosure, each of the protrusions 50 includes a bottom surface that contacts the substrate 10, the bottom surface being polygonal and including a plurality of bottom edges 501. The length of the bottom edge 501 of the protrusions 50 is within a range of 1 μm to 3000 μm. In some examples, the length of the bottom edge 501 of the protrusions 50 is within a range of 30 μm to 120 μm. For example, the length of the bottom edge 501 of the protrusions 50 may be 1 μm, 5 μm, 10 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 150 μm, 200 μm, 500 μm, 1000 μm, 2000 μm, 3000 μm, etc. In the present disclosure, when the bottom edge 501 of the protrusion 50 is a curved or broken line, the length of the bottom edge 501 refers to the vertical distance between the two bottom edges 501. Controlling the length of the bottom edge 501 of each protrusion 50 within the above range can make the gradual depth of field light and shadow effect and alternating light and dark effect of the decorative plate 100 more attractive.

[0042] Referring to FIG. 15 , in the present disclosure, pyramids and frustums are not limited to pyramids and frustums in the strict sense, but also include variations of pyramids and frustums. In some examples of the present disclosure, multiple protrusions 50 are disposed on the substrate 10. Each side of the protrusions 50 is independently flat or curved. When the side of the protrusions 50 is curved (the curved surface may be convex upward or concave downward, see FIG. 15 ), the inverted pyramid formed by the cooperation of adjacent protrusions 50 may exhibit a slight “distorted mirror” effect. In some examples of the present disclosure, each base edge of the pyramid or frustum is independently straight, curved, or broken.

[0043] In some examples of the present disclosure, the pyramid comprises a square pyramid and the frustum comprises a square truncated pyramid.

[0044] In this disclosure, the specific shape of the texture unit 40 is not limited, and it may be polygonal, circular, or irregular, as long as multiple texture units 40 can be combined into a continuous texture layer 20.

[0045] In some examples of the present disclosure, the contours of each texture unit 40 independently include at least one of curved lines (see FIG. 16), straight lines, and broken lines. As can be appreciated, the contours of each region 30 can also independently be curved lines, straight lines, broken lines, or a combination thereof. In this case, the pattern on the surface of the decorative plate 100 is more substantial, variable, and highly recognizable.

[0046] In some examples of the present disclosure, at least some of the texture units 40 have a size of 150 μm or more, so that the decorative plate 100 can clearly show the outline of the texture units 40, that is, the surface of the decorative plate 100 also has a grid effect.

[0047] In some examples of the present disclosure, at least some of the texture units 40 have a size of 100 μm or less, and the user cannot observe the outline of the texture units 40 with the naked eye, which means that the surface of the decorative plate 100 only exhibits the gradual depth of field and light and shadow variation effect, without the above-mentioned grid effect, and is aesthetically pleasing.

[0048] In some examples of the present disclosure, at least some of the texture units 40 have a size greater than 100 μm and less than 150 μm, so that the grid effect on the surface of the decorative plate 100 is faintly visible, which further enhances consumer options.

[0049] Note that texture unit 40 is a polygon. If the outline of texture unit 40 is a straight line, the size of texture unit 40 refers to the maximum edge length of texture unit 40, and if the outline of texture unit 40 is a curved or polygonal line, the size of texture unit 40 refers to the maximum vertical distance between two opposite edges of texture unit 40.

[0050] In some examples of the present disclosure, the decorative plate 100 further includes a finishing layer including one or more of a color layer, a matte layer, and a gloss layer, which is disposed on the surface of the texture layer 20 and / or the substrate 10.

[0051] When the decorative plate 100 is decorated with a color-forming layer, the color change presented in each area 30 is different, and the color also changes with the user's viewing angle, which is very decorative.

[0052] In the present disclosure, the material and thickness of the substrate 10 are not particularly limited and may be selected according to user needs. Specifically, the substrate material includes, but is not limited to, metal, glass, ceramic, polymer composite material, etc.

[0053] Therefore, this example also provides a method for making a decorative plate provided by an example of the present disclosure, including the following steps.

[0054] (1) Patterns corresponding to a first blazed diffraction grating and a second blazed diffraction grating having different extension directions are designed, the first blazed diffraction grating includes a plurality of first blazed diffraction grating subunits arranged in parallel along a first direction, and the second blazed diffraction grating includes a plurality of second blazed diffraction grating subunits arranged in parallel along a second direction, the first blazed diffraction grating and the second blazed diffraction grating are superimposed to form intersections between any of the first blazed diffraction grating subunits and any of the second blazed diffraction grating subunits, and the intersections are deformed to ensure that any one of the intersections is independently a protrusion, the protrusion comprising a pyramid or a frustum, and a unit pattern is obtained.

[0055] (2) A texture pattern of a decorative plate is designed, the texture pattern is divided into a plurality of regions, and at least some of the regions are divided into a plurality of pattern units. In the present disclosure, some regions include only one pattern unit, and each pattern unit is filled with a unit pattern to ensure that the brightness of at least some regions in the texture pattern is different and the brightness of the pattern units in a single region is similar, thereby obtaining a pattern file.

[0056] (3) A texture layer corresponding to the filled texture pattern is formed on the surface of the substrate according to the pattern file to obtain a decorative plate according to an example of the present disclosure.

[0057] In the present disclosure, the deformation process of the intersection portion may specifically include designing grayscale patterns (having height parameters) of the first blazed diffraction grating and the second blazed diffraction grating, superimposing the two grayscale patterns, and performing data processing, wherein the height of any position at that position is the average of the heights h1 and h2 of the first blazed diffraction grating and the second blazed diffraction grating or (h1 + h2) / n (n is greater than 1), so that each intersection portion of the subunits of the first blazed diffraction grating and the second blazed diffraction grating is a pyramid or a frustum. In the present disclosure, the pyramids and frustums are not limited to pyramids and frustums in the strict sense, and also include deformations of pyramids and frustums.

[0058] In some examples of the present disclosure, the groove width of the first blazed grating subunit and the second blazed grating subunit is in the range of 1 μm to 3000 μm, where the groove width is the width of the bottom edge of the blazed grating subunit perpendicular to its extension direction.

[0059] In some examples of the present disclosure, methods for forming a texture layer on the surface of a substrate include laser direct writing and photolithography.

[0060] In some examples of the present disclosure, a texture layer is formed on a glass surface by photolithography, the glass with the texture layer is then UV-transferred to transfer the pattern of the texture layer to a sheet of polymer material, which is then coated, printed, and cut to obtain a textured film sheet, and finally, the textured film sheet is attached to a substrate to obtain a decorative plate. The polymer material includes, but is not limited to, one or more of polycarbonate, polyethylene terephthalate, and polymethyl methacrylate.

[0061] The present disclosure also provides an electronic device having the decorative plate provided in the present disclosure. The electronic device may include, but is not limited to, a mobile phone, a tablet, a laptop, a smart watch, an electronic cigarette, etc. For example, the decorative plate may be processed into a case for a mobile phone, a tablet, a laptop, a smart watch, or a related part of an electronic cigarette, which can provide an attractive appearance to the electronic device and improve the appearance and product competitiveness of the electronic device.

[0062] In addition, the decorative plate can be processed into a luxury name plate, which can further enhance the artistic quality of the product.

[0063] The technical solutions of the present disclosure will now be described in detail through several embodiments. [Example]

[0064] In Example 1, the decorative plate is the back cover of a mobile phone, the substrate is made of glass, the protrusions in the texture unit are arranged without gaps, each protrusion is a regular square pyramid with a base edge length of 2 μm and a height of 6 μm, the outline of each texture unit is square, and the size of each texture unit is 95 μm. [Example]

[0065] Example 2 differs from Example 1 only in that the size of the texture unit is 200 μm. [Example]

[0066] Example 3 differs from Example 1 only in that the protrusion is a square truncated pyramid. [Example]

[0067] Example 4 differs from Example 1 only in that the protrusions are square pyramids with curved sides. [Example]

[0068] The fifth embodiment differs from the first embodiment only in that the outline of the texture unit is a curve. [Example]

[0069] Example 6 differs from Example 1 only in that the surface of the decorative plate further has a color-developing layer.

[0070] It should be noted that the above are illustrative examples of the present disclosure, and those skilled in the art can make multiple improvements and modifications without departing from the principles of the present disclosure, which are also deemed to be within the protection scope of the present disclosure.

Claims

1. A decorative plate (100) comprising a substrate (10), a texture layer (20) disposed on one side of the substrate (10), the texture layer (20) comprising a plurality of regions (30), at least a plurality of the regions (30) exhibiting variations in brightness, at least some of the regions (30) comprising a plurality of texture units (40), each of the texture units (40) comprising a plurality of protrusions (50) arranged in an array, the protrusions (50) comprising pyramids or frustums; In one of the texture units (40), each of the protrusions (50) arranged along a first direction (X) has a first side (a) and a second side (b) arranged on opposite sides and parallel to the first direction (X), the first side (a) arranged adjacent to each other form a first reflecting surface (611) of a first blazed diffraction grating subunit (61), the second side (b) arranged adjacent to each other form a second reflecting surface (612) of the first blazed diffraction grating subunit (61), and the first blazed diffraction grating subunits (61) form a first blazed diffraction grating (60); In one of the texture units (40), each of the protrusions (50) arranged along the second direction (Y) has a third side (c) and a fourth side (d) arranged on opposite sides and parallel to the second direction (Y), the plurality of third side surfaces (c) arranged adjacent to each other form a third reflective surface (711) of a second blazed diffraction grating subunit (71), the plurality of fourth side surfaces (d) arranged adjacent to each other form a fourth reflective surface (712) of the second blazed diffraction grating subunit (71), and the plurality of second blazed diffraction grating subunits (71) form a second blazed diffraction grating (70); the first direction (X) and the second direction (Y) are different; Decorative plate (100).

2. 2. The decorative plate (100) of claim 1, wherein a first region (A) and a second region (B) are defined as any two adjacent regions (30), and at least the first reflective surface (611) and the second reflective surface (612) of some of the first blazed diffraction gratings (60) and / or the third reflective surface (711) and the fourth reflective surface (712) of some of the second blazed diffraction gratings (70) in the first region (A) have an extension direction different from the extension direction of the second region (B), and / or the shape of an orthogonal projection of at least one of the first reflective surface (611), the second reflective surface (612), the third reflective surface (711), and the fourth reflective surface (712) on the substrate (10) is different from the shape of the second region (B).

3. 2. The decorative plate (100) of claim 1, wherein the first side (a), the second side (b), the third side (c), and the fourth side (d) independently comprise flat and / or curved surfaces.

4. The decorative plate (100) of claim 1, wherein each of the protrusions (50) has a bottom surface that contacts the substrate (10), the bottom surface is polygonal and has a plurality of bottom edges, and the plurality of bottom edges independently have at least one of a straight line, a curved line, and a broken line.

5. 2. The decorative plate (100) of claim 1, wherein each of the protrusions (50) has a plurality of bottom edges (501) that contact the substrate (10), the height of the protrusions (50) in a direction perpendicular to the plane of the substrate (10) is in the range of 0.1 μm to 20 μm, and the length of the bottom edges (501) is in the range of 1 μm to 3000 μm.

6. The decorative plate (100) of claim 1, wherein the pyramid comprises a square pyramid and the frustum comprises a square truncated pyramid.

7. The decorative plate (100) of claim 1, wherein the contour lines of each of the texture units (40) independently comprise at least one of a straight line, a curved line, and a broken line.

8. 2. Decorative plate (100) according to claim 1, wherein at least some of said texture units (40) have a size of 100 μm or less.

9. 2. Decorative plate (100) according to claim 1, wherein at least some of said texture units (40) have a size of 150 μm or more.

10. 2. The decorative plate (100) of claim 1, wherein in the same texture unit (40), the first blazed diffraction grating (60) and the second blazed diffraction grating (70) are angled at different angles from a predetermined direction, the predetermined direction being the length direction of the decorative plate (100).

11. 11. The decorative plate (100) of claim 10, wherein the extension direction of the first blazed diffraction grating (60) or the second blazed diffraction grating (70) in a single region (30) is parallel to the predetermined direction in some of the regions (30), and the extension direction of the first blazed diffraction grating (60) or the second blazed diffraction grating (70) in a single region (30) is perpendicular to the predetermined direction in the remaining regions (30).

12. The plurality of regions (30) comprise a first portion (M1), a second portion (M2) and a third portion (M3), and in the first portion (M1), an angle between an extension direction of the first blazed diffraction grating (60) and / or the second blazed diffraction grating (70) in a single region (30) and the predetermined direction is within a range of -30° to 30°, and in the second portion (M2), an angle between an extension direction of the first blazed diffraction grating (60) and / or the second blazed diffraction grating (70) in a single region (30) and the predetermined direction is within a range of -30° to 30°. The decorative plate (100) of claim 10, wherein the angle between the extension direction of the second blazed diffraction grating (70) and the predetermined direction is within a range of 60° to 90° and / or -90° to -60°, and in the third portion (M3), the angle between the extension direction of the first blazed diffraction grating (60) and / or the second blazed diffraction grating (70) in a single region (30) and the predetermined direction is within a range of -60° to -30° and / or 30° to 60°.

13. 13. Decorative plate (100) according to claim 12, wherein said third portion (M3) is arranged between said first portion (M1) and said second portion (M2).

14. 2. The decorative plate (100) of claim 1, wherein in at least some of the texture units (40), the extension direction of the first blazed diffraction grating (60) forms an angle (β) with the extension direction of the second blazed diffraction grating (70) in a single texture unit (40), the angle (β) being within a range of 30° to 120°.

15. The decorative plate (100) of claim 1, wherein the shape of the plurality of protrusions (50) in a single texture unit (40) is uniform.

16. The decorative plate (100) of claim 1 further comprises a finishing layer comprising one or more of a coloring layer, a matte layer, and a gloss layer, the finishing layer being disposed on the surface of the texture layer (20) and / or the substrate (10).

17. A method for making a decorative plate (100) comprising the following steps: (1) designing a first blazed diffraction grating and a second blazed diffraction grating having different extension directions, the first blazed diffraction grating comprising a plurality of first blazed diffraction grating subunits arranged in parallel along a first direction (X), and the second blazed diffraction grating comprising a plurality of second blazed diffraction grating subunits arranged in parallel along a second direction (Y); overlapping the first blazed diffraction grating and the second blazed diffraction grating to form intersections between any of the first blazed diffraction grating subunits and any of the second blazed diffraction grating subunits; and deforming the intersections to ensure that any one of the intersections is independently a protrusion, the protrusion comprising a pyramid or a frustum, to obtain a unit pattern; (2) designing a texture pattern of the decorative plate, the texture pattern being divided into a plurality of regions, at least some of the regions being divided into a plurality of pattern units, each of the pattern units being filled with a unit pattern to ensure that the brightness of at least a plurality of the regions in the texture pattern is different and the brightness of the pattern units in a single region is similar, and obtaining a pattern file; (3) forming a texture layer corresponding to the filled texture pattern on the surface of a substrate according to the pattern file to obtain a decorative plate according to any one of claims 1 to 15; A manufacturing method comprising:

18. 20. The method of claim 17, wherein the method for forming the texture layer on the surface of the substrate comprises laser direct writing and photolithography.

19. 18. The method of claim 17, wherein the groove widths of the first blazed grating subunit and the second blazed grating subunit are in the range of 1 μm to 3000 μm.

20. An electronic device, said electronic device comprising a decorative plate (100) according to any one of claims 1 to 16.

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