Film, cover plate and electronic device

Abstract

A film (400), a cover plate and an electronic device. The film (400) comprises a bearing layer (410), a first texture layer (420) and a second texture layer (430). The bearing layer (410) has a first side surface (411) and a second side surface (412) opposite each other in the direction of thickness, wherein the first texture layer (420) is arranged on the first side surface (411), and the second texture layer (430) is arranged on the second side surface (412). The first texture layer (420) comprises a first protruding structure (421) protruding in a direction away from the bearing layer (410), the first protruding structure (421) being used for forming a first texture pattern. The second texture layer (430) is used for forming a second texture pattern, and the first texture pattern and the second texture pattern are superimposed to form an interference texture pattern. The first protruding structure (421) comprises a first protruding surface, and the first protruding surface comprises a flat surface for reflecting light from the bearing layer (410), such that the brightness and glossiness of the film (400) can be improved, and the film (400) can exhibit a relatively strong metal texture.

Description

Diaphragm, cover plate and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202410689333.3, filed on May 30, 2024, and entitled "Diaphragm, cover plate and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the technical field of electronic devices, in particular to a diaphragm, a cover plate and an electronic device. BACKGROUND

[0003] The appearance of electronic devices such as mobile phones and tablet computers can affect the purchasing desire of consumers. In order to improve the appearance effect of electronic devices, a texture pattern can be provided on the electronic device.

[0004] In order to enable the texture pattern to form a variable light and shadow effect, in the related art, two texture layers can be provided on the electronic device, and the superposition of the two texture layers can produce a moire effect, thereby forming an interference texture pattern with variable light and shadow.

[0005] However, in the related art, the brightness and gloss of the diaphragm with a variable light and shadow appearance effect are poor, and it is difficult to produce a strong metallic texture. SUMMARY

[0006] Embodiments of the present application provide a diaphragm, a cover plate and an electronic device, which can improve the brightness and gloss of the diaphragm with a variable light and shadow appearance effect, and enable the diaphragm with a variable light and shadow appearance effect to produce a strong metallic texture.

[0007] A first aspect of embodiments of the present application provides a diaphragm, which includes a carrier layer, a first texture layer and a second texture layer. The carrier layer has a first side and a second side, the first side and the second side are respectively located on both sides of the thickness direction of the carrier layer, the first texture layer is provided on the first side, and the second texture layer is provided on the second side. The first texture layer includes a first protruding structure protruding away from the carrier layer, and the first protruding structure is used to form a first texture pattern. The second texture layer is used to form a second texture pattern, and the first texture pattern and the second texture pattern superimpose to form an interference texture pattern. The first protruding structure includes a first protruding surface protruding from the first side, and the first protruding surface includes a plurality of reflecting surfaces. The reflecting surfaces are used to reflect light rays emitted by the carrier layer toward the reflecting surfaces, and at least one reflecting surface is a plane.

[0008] The parallel light rays radiated to the first convex surface are reflected at the plane of the first convex surface to form reflected light rays with the same radiation direction, which can produce a relatively strong mirror reflection effect, so that the user can see a higher brightness and gloss of the film under the corresponding viewing angle, and the film can have a stronger metallic texture.

[0009] In a possible implementation, the at least one plane is inclined relative to the first side surface. In this way, the plurality of reflection surfaces of the first convex surface can be arranged on the light path of the light rays radiated to the first convex structure by the carrier layer. When the plurality of reflection surfaces are arranged on the light path of the light rays radiated to the first convex structure by the carrier layer, a plurality of reflected light rays with different radiation directions can be reflected by the first convex surface, so as to achieve the appearance effect of varied light and shadow.

[0010] In a possible implementation, the first convex structure is a convex polyhedral structure. In this way, the interference texture pattern with relatively high brightness and gloss can be formed under a plurality of different viewing angles.

[0011] In a possible implementation, the first convex surface is composed of a plurality of planes, and each plane is inclined relative to the first side surface. In this way, the light condensing effect of the first convex surface is better, and more reflected light rays can enter the user's line of sight, so that the interference texture pattern formed has relatively high brightness and gloss.

[0012] In a possible implementation, at least one reflection surface is a curved surface. In this way, the first texture pattern formed can have relatively rich changes, and the interference texture pattern formed can have relatively rich changes, and the film can have relatively diverse changes under different viewing angles.

[0013] In a possible implementation, the first convex structure further includes a connecting surface connected to the first side surface, and a projection of the first convex surface along the thickness direction of the carrier layer is located within a projection of the connecting surface along the thickness direction of the carrier layer. In this way, the first convex structure can be formed on the first side surface more easily.

[0014] In a possible implementation, an area enclosed by the contour of the first convex surface gradually decreases from one end close to the carrier layer to one end away from the carrier layer. In this way, each surface of the first convex surface can reflect the light rays radiated to the first convex structure by the carrier layer better, so as to achieve the appearance effect of varied light and shadow. In addition, the number of reflected light rays reflected by the first convex surface and capable of entering the user's line of sight is relatively large, and the interference texture pattern formed has relatively high brightness and gloss.

[0015] In a possible implementation, in the same first protruding structure, the normals at the centers of all the reflecting surfaces intersect at the same normal intersection point, the distance between the normal intersection point and the end of the first protruding structure away from the carrier layer is L, the distance between the end of the first protruding structure away from the carrier layer and the carrier layer is H1, the thickness of the carrier layer is H2, and L = 2(H1 + H2). In this way, the formed interference texture pattern can be more varied, and the film can have more changes at different viewing angles. In addition, the formed interference texture pattern can change more continuously with the change of the viewing angle.

[0016] In a possible implementation, the film further includes a first coating layer. The first texture layer is located between the carrier layer and the first coating layer, the first protruding surface is connected to the first coating layer, and the refractive index of the first coating layer is different from the refractive index of the first protruding structure. In this way, the reflection effect at the first protruding surface can be better, and the film can have higher gloss and brightness and stronger metal texture. In addition, the formed first texture pattern can be clearer, and the interference texture pattern formed at different viewing angles can change significantly. In addition, the appearance effect of the interference texture pattern can also be changed through the first coating layer.

[0017] In a possible implementation, the film further includes an ink layer. The ink layer is located on the side of the first coating layer away from the carrier layer, and the ink layer is arranged on the surface of the first coating layer. In this way, the ink layer can be used to add appearance effects such as base color and base image to the film, so that the film can provide more appearance effects. Through the superposition of the ink layer and the first coating layer, more appearance effects can be provided.

[0018] In a possible implementation, the film further includes an ink layer. The first texture layer is located between the carrier layer and the ink layer, and the first protruding surface is connected to the ink layer. In this way, the ink layer can be used to add appearance effects such as base color and base image to the film, so that the film can provide more appearance effects. In addition, the ink layer can be used to make the interface at the first protruding surface clear, so that the film has higher gloss and brightness, stronger metal texture, and significant changes in the interference texture pattern formed at different viewing angles. In addition, since the first coating layer does not need to be formed, the thickness of the film can be reduced, the processing process of the film is simpler, and the cost is lower.

[0019] In a possible implementation, the second texture layer includes a colored structure for forming a second texture pattern. In this way, the second texture pattern can be formed by making the reflected light formed by the reflection of the first protruding surface irradiate the colored structure, and the structure of the second texture layer is less limited.

[0020] In a possible implementation, the second texture layer includes second protruding structures protruding away from the carrier layer, and the second protruding structures are used to form the second texture pattern. The second protruding structures include second protruding surfaces protruding from the second side surface, and the second protruding surfaces are used to refract light rays emitted by the carrier layer towards the second protruding surfaces. In this way, the light rays reflected by the first protruding surfaces can be refracted at the second protruding surfaces, so that the light rays emitted at different positions of the second protruding surfaces have different directions, and different second texture patterns can be formed at different viewing angles, and the change of the interference texture pattern formed is more abundant.

[0021] The second protruding structures can be the same as the first protruding structures, or the second protruding structures can be different from the first protruding structures.

[0022] For example, the second protruding surfaces can include one or more planes, or the second protruding surfaces of the second protruding structures can include one or more planes and one or more curved surfaces.

[0023] For another example, the second protruding surfaces can be curved surfaces.

[0024] In a possible implementation, the film sheet further includes a second coating layer. The second texture layer is located between the carrier layer and the second coating layer, the second protruding surfaces are in contact with the second coating layer, and the refractive index of the second coating layer is different from the refractive index of the second protruding structures. In this way, the second coating layer can make the interface at the second protruding surfaces clear, can improve the clarity of the second texture pattern formed, and can make the change of the interference texture pattern formed at different viewing angles obvious. In addition, the appearance effect of the interference texture pattern formed can be changed through the second coating layer. Furthermore, the selection of the transparent adhesive layer can be reduced, and a transparent adhesive layer with the same or similar refractive index as the second protruding structures can be selected to bond the film sheet.

[0025] In a possible implementation, the second texture layer includes an optical metasurface structure, and the optical metasurface structure is used to form the second texture pattern. In this way, the second texture pattern can be formed through the refraction of the optical metasurface structure to the light rays, and the second texture pattern formed can be more abundant, and the interference texture pattern formed can be more abundant.

[0026] In a possible implementation, the second texture layer includes a Fabry-Perot resonant cavity structure, and the Fabry-Perot resonant cavity structure is used to form the second texture pattern. In this way, the second texture pattern can be formed through the resonance of the Fabry-Perot resonant cavity structure to the light rays, and the second texture pattern formed can be controlled.

[0027] The second aspect of the embodiments of the present application provides a cover plate, which comprises the film sheet in any of the above embodiments and a light-transmissive substrate. The film sheet is arranged on the inner surface of the substrate, and the second texture layer of the film sheet is between the substrate and the carrier layer of the film sheet.

[0028] The third aspect of the embodiments of the present application provides an electronic device, which comprises the cover plate in any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present application;

[0030] FIG. 2 is a schematic diagram of a display screen of an electronic device according to an embodiment of the present application;

[0031] FIG. 3 is a schematic diagram of a back cover of an electronic device according to an embodiment of the present application;

[0032] FIG. 4 is a schematic diagram of a cover plate according to an embodiment of the present application;

[0033] FIG. 5 is a schematic diagram of another cover plate according to an embodiment of the present application;

[0034] FIG. 6 is a schematic diagram of the carrier layer and the first texture layer of the cover plate shown in FIG. 5;

[0035] FIG. 7 is an image of the cover plate shown in FIG. 5 as viewed from a first perspective;

[0036] FIG. 8 is an image of the cover plate shown in FIG. 5 as viewed from a second perspective;

[0037] FIG. 9 is a schematic diagram of a film sheet according to an embodiment of the present application;

[0038] FIG. 10 is a schematic diagram of another film sheet according to an embodiment of the present application;

[0039] FIG. 11 is a schematic diagram of the carrier layer and the first texture layer of another cover plate according to an embodiment of the present application;

[0040] FIG. 12 is a schematic diagram of a first texture layer on a first side according to an embodiment of the present application;

[0041] FIG. 13 is a schematic diagram of another first texture layer on a first side according to an embodiment of the present application;

[0042] FIG. 14 is a schematic diagram of the carrier layer and the first texture layer of another cover plate according to an embodiment of the present application;

[0043] FIG. 15 is a schematic diagram of the carrier layer and the first texture layer of another cover plate according to an embodiment of the present application;

[0044] FIG. 16 is a schematic view of a bearing layer and a first texture layer of a cover plate according to an embodiment of the present application;

[0045] FIG. 17 is a schematic view of a cover plate according to an embodiment of the present application;

[0046] FIG. 18 is a schematic view of a cover plate according to an embodiment of the present application;

[0047] FIG. 19 is a schematic view of a cover plate according to an embodiment of the present application.

[0048] Legend: 100, display screen; 110, front cover; 111, display area; 112, non-display area; 120, display module; 200, housing; 210, base housing; 220, rear cover; 221, base cover; 222, surface plate; 300, substrate; 400, film; 410, bearing layer; 411, first side; 412, second side; 420, first texture layer; 421, first protruding structure; 4211a, first plane; 4211b, second plane; 4211c, third plane; 4211d, fourth plane; 4211e, fifth plane; 4211f, sixth plane; 4211g, seventh plane; 4211h, eighth plane; 4212, connecting surface; 4213a, first curved surface; 4213b, second curved surface; 4213c, third curved surface; 4213d, fourth curved surface; 430, second texture layer; 431, colored structure; 432, base material structure; 433, second protruding structure; 440, first plating layer; 450, ink layer; 460, protective layer; 470, transparent adhesive layer; 480, release film; 490, second plating layer; P, normal intersection; H1, distance between one end of the first protruding structure away from the bearing layer and the bearing layer; H2, thickness of the bearing layer; L, distance between the normal intersection and one end of the first protruding structure away from the bearing layer. DETAILED DESCRIPTION

[0049] The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0050] The electronic device can include, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a point of sales (POS) machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, a television, and the like. Embodiments of the present application are described by taking the mobile phone as an example.

[0051] FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present application.

[0052] As shown in FIG. 1, in the embodiment of the present application, the electronic device can include a housing 200, which is used to form a device mounting cavity, and the device mounting cavity can be used to accommodate electronic devices such as a mainboard and a chip.

[0053] The electronic device can further include a display screen 100, which can be arranged on one side in the thickness direction of the housing 200, and the display screen 100 can be used to cover an opening of the device mounting cavity on one side in the thickness direction of the housing 200.

[0054] For example, the display screen 100 can be bonded to the housing 200.

[0055] The housing 200 can include a base housing 210 and a back cover 220, and the back cover 220 and the display screen 100 are arranged on opposite sides of the base housing 210, respectively, and the base housing 210 and the back cover 220 are used to form the device mounting cavity.

[0056] For example, the base housing 210 can be a frame or a middle frame of the electronic device.

[0057] For example, the display screen 100 can be bonded to the base housing 210.

[0058] In some examples, the base housing 210 and the back cover 220 can be an integrated structure.

[0059] In other examples, the base housing 210 and the back cover 220 can be a split structure, and the back cover 220 can be arranged on the base housing 210 by at least one of bonding, clamping, fastener connection, and the like.

[0060] FIG. 2 is a schematic diagram of a display screen of an electronic device according to an embodiment of the present application.

[0061] As shown in FIG. 2, in some examples, the display screen 100 can include a front cover 110 and a display module 120. The front cover 110 can be attached to the base shell 210 and can be used to cover an opening of the device mounting cavity on one side of the thickness direction of the shell 200. The display module 120 is disposed on the inner side of the front cover 110 and is used to form a display image. The front cover 110 is located on the light exit side of the display module 120. The front cover 110 can isolate the display module 120 from the outside world and protect the display module 120, so that the display module 120 is not easily damaged by touching external objects.

[0062] The front cover 110 includes a display area 111, which is a light-transmitting area. The image formed by the display module 120 can be displayed through the display area 111.

[0063] In some examples, the front cover 110 can also include a non-display area 112 located on the periphery of the display area 111. The non-display area 112 can be used to shield part of the device on the inner side of the front cover 110.

[0064] In other examples, the front cover 110 can also not include the non-display area 112, and the entire front cover 110 can be the display area 111.

[0065] FIG. 3 is a schematic diagram of a rear cover of an electronic device according to an embodiment of the present application.

[0066] As shown in FIG. 3, in some examples, the rear cover 220 can include a base cover 221 and a surface layer plate 222. One side of the base cover 221 in the thickness direction is connected to the base shell 210, and the surface layer plate 222 is disposed on the other side of the base cover 221 in the thickness direction. The base shell 210 and the base cover 221 are used to form a device mounting cavity.

[0067] In examples in which the base shell 210 and the rear cover 220 are an integral structure, the base shell 210 and the base cover 221 are an integral structure.

[0068] In examples in which the base shell 210 and the rear cover 220 are a split structure, the base cover 221 can be disposed on the base shell 210 by at least one of bonding, clamping, fastener connection, etc.

[0069] For example, the surface layer plate 222 can be bonded to the base cover 221. For example, an adhesive can be provided on the edge of the surface layer plate 222, and the surface layer plate 222 can be bonded to the base cover 221 by the adhesive provided on the edge.

[0070] FIG. 4 is a schematic diagram of a cover plate according to an embodiment of the present application.

[0071] As shown in FIG. 4, in order to improve the appearance effect of the electronic device, the present application provides a cover plate. The electronic device includes the cover plate, and the cover plate is located on the outer surface of the electronic device.

[0072] The outer surface of the electronic device refers to a surface of the electronic device that a user can directly contact.

[0073] The cover plate can include, but is not limited to, a plate-shaped structure such as a front cover 110, a rear cover 220, a surface layer plate 222, etc. located on the outer surface of the electronic device. For example, when the base housing 210 and the rear cover 220 are an integrated structure, the cover plate can be the whole formed by the base housing 210 and the rear cover 220.

[0074] In an embodiment of the present application, the cover plate includes a film sheet 400 and a light-transmissive substrate 300, and the film sheet 400 is disposed on the inner surface of the substrate 300.

[0075] The outer surface of the substrate 300 refers to a surface of the substrate 300 that a user can directly contact, and the inner surface of the substrate 300 is a surface on the side opposite to the outer surface of the substrate 300, and the inner surface of the substrate 300 and the outer surface of the substrate 300 are respectively located on both sides in the thickness direction of the substrate 300.

[0076] The film sheet 400 is used to form a texture pattern, and the texture pattern formed by the film sheet 400 can be transmitted through the substrate 300 into the eyes of the user, thereby improving the appearance effect of the electronic device.

[0077] The substrate 300 can carry the film sheet 400 and protect the film sheet 400 disposed on the inner surface of the substrate 300.

[0078] When the cover plate is the front cover 110, the cover plate includes a display area 111 and a non-display area 112, the film sheet 400 is disposed on the non-display area 112, and the substrate 300 is attached to the base housing 210, for example, the substrate 300 can be fixedly attached to the base housing 210.

[0079] When the cover plate is the surface layer plate 222, the edge of the substrate 300 can be provided with an adhesive, and the substrate 300 can be attached to the base cover 221 through the adhesive provided on the edge.

[0080] In some examples in which the cover plate is the rear cover 220, the rear cover 220 can include a base cover 221 and a surface layer plate 222, and the substrate 300 can be attached to the base cover 221 of the rear cover 220, and the base cover 221 is fixedly connected to the base housing 210.

[0081] In other examples in which the cover plate is the rear cover 220, the rear cover 220 can also include the surface layer plate 222 but not the base cover 221, and the edge of the substrate 300 can be fixedly connected to the base housing 210.

[0082] Exemplarily, the substrate 300 can be a transparent or semi-transparent substrate, for example, the substrate 300 can include but is not limited to a glass substrate, a polymethyl methacrylate (PMMA) substrate, a resin substrate, a ceramic substrate, a sapphire substrate, etc.

[0083] Exemplarily, the film 400 can be adhered to the inner surface of the substrate 300 through a transparent adhesive layer 470. For example, the transparent adhesive layer 470 can be an optically clear adhesive (OCA).

[0084] Exemplarily, the film 400 can include the transparent adhesive layer 470, or can not include the transparent adhesive layer 470.

[0085] When the film 400 does not include the transparent adhesive layer 470, the transparent adhesive layer 470 is a layer of structure between the film 400 and the substrate 300, and the transparent adhesive layer 470 can be coated on the surface of the film 400 or the substrate 300 before the film 400 and the substrate 300 are adhered.

[0086] Exemplarily, the thickness of the transparent adhesive layer 470 can be 10-25 um.

[0087] FIG. 5 is a schematic diagram of another cover plate provided by an embodiment of the present application.

[0088] As shown in FIG. 5, in the embodiment of the present application, the film 400 includes a carrier layer 410, and the carrier layer 410 is used to carry other structure layers of the film 400 to provide a substrate for the film 400.

[0089] Exemplarily, the carrier layer 410 can include but is not limited to a polyethylene terephthalate (PET) layer, a polycarbonate (PC) layer, a biaxially oriented polypropylene (bopp) layer, a thermoplastic polyurethanes (TPU) layer, etc.

[0090] To make the texture pattern formed by the film sheet 400 have a variable light and shadow effect, the film sheet 400 further comprises a first texture layer 420 and a second texture layer 430, and the carrier layer 410 has a first side 411 and a second side 412, which are respectively located on two sides of the carrier layer 410 in the thickness direction, and after the film sheet 400 is arranged on the inner surface of the substrate 300, the first side 411 is a side surface of the carrier layer 410 away from the substrate 300, and the second side 412 is a side surface of the carrier layer 410 close to the substrate 300. The first texture layer 420 is arranged on the first side 411, and the second texture layer 430 is arranged on the second side 412, that is, after the film sheet 400 is arranged on the inner surface of the substrate 300, the second texture layer 430 is located between the substrate 300 and the carrier layer 410, and the carrier layer 410 is located between the first texture layer 420 and the substrate 300.

[0091] The first texture layer 420 comprises a first protruding structure 421 protruding away from the carrier layer 410, and the first protruding structure 421 is used to form a first texture pattern, and the second texture layer 430 is used to form a second texture pattern, and the first texture pattern and the second texture pattern are superimposed to form an interference texture pattern.

[0092] The interference texture pattern refers to a texture pattern formed by the superimposed first texture pattern and second texture pattern producing a moire effect of mutual interference, and the interference texture pattern formed by the superimposed first texture pattern and second texture pattern producing a moire effect has a variable light and shadow effect.

[0093] Specifically, the first protruding structure 421 comprises a first protruding surface protruding from the first side 411, and the first protruding surface is used to reflect light rays emitted by the carrier layer 410 toward the first protruding surface. After the light rays from the user side pass through the substrate 300, the second texture layer 430 and the carrier layer 410 and enter the first texture layer 420, the first texture pattern is formed by reflection of the first protruding surface, and the light rays reflected by the first protruding surface form the second texture pattern when passing through the second texture layer 430, and the first texture pattern formed by the first texture layer 420 and the second texture pattern formed by the second texture layer 430 produce a moire effect of mutual interference, and further form an interference texture pattern with variable light and shadow.

[0094] The first texture layer 420 and the second texture layer 430 are respectively arranged on two sides of the carrier layer 410 in the thickness direction, which can make the process of forming the superimposed second texture layer 430 and the first texture layer 420 with the first protruding structure 421 on the carrier layer 410 relatively simple, and the first texture layer 420 and the second texture layer 430 are relatively easy to form.

[0095] In the related art, the first convex surface is a curved surface forming a lens structure. However, when the first convex surface is a curved surface forming a lens structure, the directions of the reflected light rays formed by the reflection of the parallel light rays at different positions of the first convex surface are different, the reflected light rays formed by the reflection of the first convex surface are divergent in different directions, and a diffuse reflection effect is generated, so that the brightness and gloss of the film seen by the user are poor, and the film is difficult to have a strong metallic texture.

[0096] Based on this, in the embodiments of the present application, the first convex surface includes a plurality of reflection surfaces, and the reflection surfaces are used to reflect the light rays from the bearing layer 410. One or more of the plurality of reflection surfaces is a plane, that is, the first convex surface includes one or more planes used to reflect the light rays from the bearing layer 410. Alternatively, one or more of the plurality of reflection surfaces is a plane, and one or more of the plurality of reflection surfaces is a curved surface, that is, the first convex surface includes one or more planes used to reflect the light rays from the bearing layer 410 and one or more curved surfaces used to reflect the light rays from the bearing layer 410. In this way, the purpose of improving the brightness and gloss of the film 400 having a light and shadow variable appearance effect can be achieved, so that the film 400 has a strong metallic texture.

[0097] FIG. 6 is a schematic view of the bearing layer and the first texture layer of the cover plate provided in FIG. 5.

[0098] As shown in FIG. 6, and referring to FIG. 5, in the embodiments of the present application, at least one reflection surface of the first convex surface is a plane, that is, the first convex surface includes a plane used to reflect the light rays from the bearing layer 410. For example, the first convex surface can include a first plane 4211a and a second plane 4211b, and both the first plane 4211a and the second plane 4211b can be used to reflect the light rays from the bearing layer 410.

[0099] In this way, the directions of the reflected light rays formed by the reflection of the parallel light rays on the plane reflection surface are the same, a strong mirror reflection effect is generated, the brightness and gloss of the film 400 seen by the user at the corresponding viewing angle are high, and the film 400 can have a strong metallic texture.

[0100] The first convex structure 421 further includes a connecting surface 4212 connected to the first side surface 411, the connecting surface 4212 is a surface at which the first convex structure 421 is combined with the first side surface 411, and the first convex surface is connected to the edge of the connecting surface 4212. For example, the first plane 4211a and the second plane 4211b are both connected to the edge of the connecting surface 4212.

[0101] The first texture layer 420 can include a plurality of first convex structures 421.

[0102] In some examples, the first protruding structures 421 can be arranged continuously on the first side surface 411, that is, the connecting surfaces 4212 of two adjacent first protruding structures 421 are connected.

[0103] In other examples, the first protruding structures 421 can also be arranged spacedly on the first side surface 411, that is, there is a spacing between the connecting surfaces 4212 of two adjacent first protruding structures 421.

[0104] The first protruding structures 421 can be formed of a cured material, which can include but is not limited to a light-cured material or a heat-cured material, for example, the cured material can include but is not limited to an epoxy resin, a phenolic resin, etc.

[0105] In some examples, the first protruding structures 421 can be formed of ultraviolet rays (UV) curing glue, which can also be called shadowless glue or photosensitive glue. The first protruding structures 421 can be formed on the first side surface 411 by a UV curing glue embossing process. Specifically, a layer of UV curing glue can be laid on the first side surface 411, and then the UV curing glue laid on the first side surface 411 can be embossed by a mold having a texture, and then the embossed UV curing glue can be exposed to form the first protruding structures 421.

[0106] In other examples, the first protruding structures 421 can be formed of photoresist, and the first protruding structures 421 can be formed on the first side surface 411 by a photoetching process. Specifically, a layer of photoresist can be laid on the first side surface 411, and then the photoresist laid on the first side surface 411 can be photoetched to form the first protruding structures 421.

[0107] FIG. 7 is an image of the cover plate provided in FIG. 5 as viewed from a first perspective, and FIG. 8 is an image of the cover plate provided in FIG. 5 as viewed from a second perspective. In FIG. 5, P1 and P2 respectively represent the first perspective and the second perspective, which are two different perspectives.

[0108] As shown in FIGS. 7 and 8, and with reference to FIGS. 5 and 6, the light rays emitted from the carrier layer 410 toward the first protruding surface can form different reflected light rays after being reflected on different reflection surfaces of the first protruding surface. The positions and angles of the different reflected light rays when passing through the second texture layer 430 are different, so that the interference texture patterns formed as viewed from the first perspective P1 and the second perspective P2 can be different, thereby forming interference texture patterns with changing light and shadow.

[0109] It should be noted that the two patterns shown in FIGS. 7 and 8 are only used to represent that the interference texture patterns seen at the first view angle PI and the second view angle P2 are two different patterns, and do not specify two specific patterns. The two different patterns can be one or more of different patterns in shape, brightness, color, etc.

[0110] With continued reference to FIG. 5, in some possible embodiments, the film sheet 400 further includes a first coating layer 440. The first texture layer 420 is located between the carrier layer 410 and the first coating layer 440, the first convex surface is in contact with the first coating layer 440, and the refractive index of the first coating layer 440 is different from the refractive index of the first convex structure 421.

[0111] In this way, the interface at the first convex surface can be clear by the first coating layer 440, and the reflection effect at the first convex surface can be improved, so that the glossiness and brightness of the film sheet 400 are improved, and the metallic texture of the film sheet 400 is stronger. In addition, the reflection effect at the first convex surface is improved, the clarity of the first texture pattern formed can be improved, and the change of the interference texture pattern formed at different view angles can be obvious. In addition, the first coating layer 440 can also change the appearance effects such as the base color and the transparency of the interference texture pattern formed, so that the film sheet 400 can provide more rich appearance effects.

[0112] The light rays emitted from the carrier layer 410 to the first convex surface will be refracted at the first convex surface in addition to being reflected, and then can be emitted into the first coating layer 440.

[0113] When the first convex surface is in contact with the first coating layer 440 and the first side surface 411 is covered by the first convex structure 421, the first coating layer 440 is arranged on the surface of the first convex structure 421, and the first coating layer 440 covers the first convex surface of all the first convex structures 421.

[0114] When the first convex surface is in contact with the first coating layer 440 and the first side surface 411 includes a first area covered by the first convex structure 421 and a second area not covered by the first convex structure 421, the first coating layer 440 is arranged on the surface of the first convex structure 421 and the second area of the first side surface 411, and the first coating layer 440 covers the first convex surface of all the first convex structures 421 and the second area of the first side surface 411.

[0115] For example, the first coating layer 440 can be formed of one or more of the following materials: magnesium fluoride, titanium dioxide, zirconium oxide, niobium oxide, etc.

[0116] Exemplarily, the first coating layer 440 can be formed by one or more of a non conductive vacuum metalize (NCVM) process, a plasma enhanced chemical vapor deposition (PECVD) process, a metal organic chemical vapor deposition (MOCVD) process, an electrochemical deposition process, a radio frequency (RF) sputtering process, a direct current (DC) sputtering process, etc.

[0117] Exemplarily, the first coating layer 440 can have a thickness of 20-400 nm.

[0118] In some possible embodiments, the film sheet 400 further comprises an ink layer 450 located on the side of the first coating layer 440 away from the carrier layer 410. The ink layer 450 can be used to add a base color, a base pattern, etc. to the film sheet 400, so that the film sheet 400 can provide more rich appearance effects.

[0119] The ink layer 450 can be formed on the side of the first coating layer 440 away from the carrier layer 410 by one or more of a silk screen printing process, a spraying process, etc.

[0120] Exemplarily, the ink layer 450 can have a thickness of 15-50 um.

[0121] In some examples in which the first convex surface is connected to the first coating layer 440, the ink layer 450 is located on the side of the first coating layer 440 away from the carrier layer 410, and the ink layer 450 is disposed on the surface of the first coating layer 440. In this case, the ink layer 450 can be formed on the side of the first coating layer 440 away from the carrier layer 410 by one or more of a silk screen printing process, a spraying process, etc. after the first coating layer 440 is formed.

[0122] In this way, the ink layer 450 and the first coating layer 440 can be superimposed to provide various appearance effects, so that the film sheet 400 can provide more rich appearance effects. In addition, the ink layer 450 can also be used to fill the recess structure formed by the first coating layer 440 due to being disposed on the surface of the first convex structure 421, so as to form a smooth plane on the side of the film sheet 400 away from the substrate 300.

[0123] In some examples, the film 400 further comprises a protective layer 460 located on the surface of the film 400 away from the substrate 300, which can be used to improve one or more of the wear resistance, oxidation resistance, corrosion resistance, and the like of the film 400, so as to improve the service life of the film 400.

[0124] In some examples in which the film 400 comprises the ink layer 450, the protective layer 460 can be arranged on the surface of the ink layer 450 away from the carrier layer 410.

[0125] In some examples in which the first convex surface is in contact with the first coating layer 440, the film 400 can also not comprise the ink layer 450, and the concave structure formed on the first convex structure 421 due to the arrangement of the first convex structure 421 can be filled by the protective layer 460 or other structural layer.

[0126] FIG. 9 is a schematic view of a film according to an embodiment of the present application.

[0127] As shown in FIG. 9, in some examples in which the film 400 comprises the ink layer 450, the first texture layer 420 is located between the carrier layer 410 and the ink layer 450, and the first convex surface is in contact with the ink layer 450. At this time, the first texture layer 420 and the ink layer 450 are not in contact with the first coating layer 440, and the ink layer 450 can be formed on the first convex surface by one or more of a silk-screen printing process, a spraying process, and the like after the formation of the first convex structure 421.

[0128] In this way, the ink layer 450 can be used to make the interface at the first convex surface clear, so as to make the film 400 have higher gloss and brightness, stronger metal texture, and more obvious changes in the interference texture pattern under different viewing angles. In addition, since the first coating layer 440 does not need to be formed, the thickness of the film 400 can be reduced, and the processing process of the film 400 is simpler and the cost is lower.

[0129] The ink layer 450 can fill the concave structure formed due to the protrusion of the first convex structure 421.

[0130] The ink layer 450 has a different refractive index from that of the first convex structure 421.

[0131] When the first convex surface is in contact with the ink layer 450 and the first side surface 411 is covered by the first convex structure 421, the ink layer 450 is arranged on the surface of the first convex structure 421, and the ink layer 450 covers the first convex surface of all the first convex structures 421.

[0132] When the first raised surface is in contact with the ink layer 450, and the first side surface 411 includes a first region covered by the first raised structure 421 and a second region not covered by the first raised structure 421, the ink layer 450 is arranged on the surface of the first raised structure 421 and the second region of the first side surface 411, and the ink layer 450 covers all the first raised surface of the first raised structure 421 and the second region of the first side surface 411.

[0133] FIG. 10 is a schematic diagram of another film provided by an embodiment of the present application.

[0134] As shown in FIG. 10, in the example where the film 400 includes the transparent adhesive layer 470, the second textured layer 430 is located between the carrier layer 410 and the transparent adhesive layer 470. Before the film 400 is adhered to the substrate 300, the film 400 can further include a release film 480, which covers the surface of the transparent adhesive layer 470 away from the carrier layer 410, to facilitate transportation and storage of the film 400. When it is necessary to adhere the film 400 to the substrate 300, the release film 480 can be peeled off from the surface of the transparent adhesive layer 470, and then the film 400 is adhered to the substrate 300 through the transparent adhesive layer 470.

[0135] FIG. 11 is a schematic diagram of the carrier layer and the first textured layer of another cover plate provided by an embodiment of the present application.

[0136] As shown in FIG. 11, in some possible implementations, at least one of the first raised surfaces is a planar reflective surface inclined relative to the first side surface 411. For example, one of the first raised surfaces is a third plane 4211c, and the other is a fourth plane 4211d, that is, the first raised surfaces can include the third plane 4211c and the fourth plane 4211d, both of which are used to reflect light from the carrier layer 410, and at least one of the third plane 4211c and the fourth plane 4211d is inclined relative to the first side surface 411.

[0137] In this way, it is convenient to form an interference textured pattern with high brightness and glossiness at an inclined viewing angle relative to the film 400. In addition, it is also convenient to arrange multiple reflective surfaces of the first raised surfaces on the light path of the light from the carrier layer 410 into the first raised structure 421. When multiple reflective surfaces are arranged on the light path of the light from the carrier layer 410 into the first raised structure, multiple different reflective light rays can be formed by reflection of the first raised surfaces, so as to realize a varied appearance effect of light and shadow.

[0138] For example, the third plane 4211c and the fourth plane 4211d can both be inclined relative to the first side surface 411.

[0139] In some possible embodiments, a projection of the first convex surface along the thickness direction of the carrier layer 410 is located within a projection of the connecting surface 4212 along the thickness direction of the carrier layer 410. In this way, the first convex structure 421 can be formed more easily on the first side surface.

[0140] In some examples, an area enclosed by the profile of the first convex surface gradually decreases from the end close to the carrier layer 410 to the end away from the carrier layer 410.

[0141] In this way, each face of the first convex surface can reflect the light rays from the carrier layer 410 into the first convex structure 421 more effectively, facilitating the realization of the appearance effect of varied light and shadow. In addition, the number of reflected light rays formed by the first convex surface and entering the line of sight of the user is relatively large, and the brightness and gloss of the interference texture pattern formed are relatively high.

[0142] Referring back to FIG. 11, in FIG. 11, P is the intersection point of the normal of the normal at the center of the reflecting surface of the first convex structure 421, H1 is the distance between the end of the first convex structure 421 away from the carrier layer 410 and the carrier layer 410, H2 is the thickness of the carrier layer 410, and L is the distance between the intersection point of the normal and the end of the first convex structure 421 away from the carrier layer 410. In some possible embodiments, in the same first convex structure 421, the normals at the centers of all the reflecting surfaces intersect at the same intersection point P, that is, the normals at the centers of all the reflecting surfaces intersect at the same point, which is referred to as the intersection point P of the normal of the first convex structure 421, the distance between the intersection point P of the normal and the end of the first convex structure 421 away from the carrier layer 410 is L, the distance between the end of the first convex structure 421 away from the carrier layer 410 and the carrier layer 410 is H1, the thickness of the carrier layer 410 is H2, and L = 2(H1 + H2).

[0143] In this way, the interference texture pattern formed can vary more richly, and the diaphragm 400 can vary more diversely under different viewing angles. In addition, the interference texture pattern formed can change more continuously with the change of the viewing angle.

[0144] In some possible embodiments, at least one reflecting surface of the first convex surface is a curved surface, that is, the first convex surface includes a curved surface for reflecting the light rays from the carrier layer 410. In the same first convex structure 421, the normals at the centers of all the reflecting surfaces that are planes all pass through the intersection point P of the normal, and the normals at the centers of all the reflecting surfaces that are curved surfaces also pass through the intersection point P of the normal.

[0145] The intersection points P of the normals of different first convex structures 421 are different.

[0146] FIG. 12 is a schematic diagram of a first texture layer on a first side surface according to an embodiment of the present application.

[0147] As shown in FIG. 12, in some possible embodiments, the first protruding structure 421 is a convex polyhedral structure, that is, the first protruding surface is composed of multiple planes, and each reflecting surface of the first protruding surface is a plane.

[0148] In this way, the interference texture pattern with high brightness and glossiness can be formed at multiple different viewing angles.

[0149] For example, the first protruding structure 421 can be a tetrahedron structure, a pentahedron structure, or the like.

[0150] In some examples in which the first protruding surface is composed of multiple planes, each plane of the first protruding surface is inclined relative to the first side surface 411, that is, each reflecting surface of the first protruding surface is a plane inclined relative to the first side surface 411.

[0151] In this way, the light collecting effect of the first protruding surface is good, and more reflected light can enter the user's line of sight, so that the interference texture pattern formed has high brightness and glossiness.

[0152] In some examples, the multiple first protruding structures 421 of the first texture layer 420 are arranged in a matrix on the first side surface 411. In this way, the first texture layer 420 is easy to form.

[0153] In some examples, the multiple first protruding structures 421 of the first texture layer 420 are arranged in a honeycomb shape on the first side surface 411.

[0154] In this way, high-density arrangement of the first protruding structures 421 is facilitated, which is beneficial to improving the resolution of the interference texture pattern formed. In addition, it is also beneficial to forming a more rich interference texture pattern.

[0155] FIG. 13 is a schematic view of another first texture layer on a first side surface according to an embodiment of the present application.

[0156] As shown in FIG. 13, in some possible embodiments, the first protruding structure 421 can be a convex ridge structure with two ends extending along a straight line, and the multiple first protruding structures 421 are arranged in parallel on the first side surface 411. In this way, the first texture layer 420 is easy to form.

[0157] FIG. 14 is a schematic view of a bearing layer and a first texture layer of another cover plate according to an embodiment of the present application.

[0158] As shown in FIG. 14, in some examples, at least one reflecting surface of the first convex surface is curved, that is, the first convex surface includes a curved surface for reflecting light from the carrier layer 410. For example, the first convex surface can include a fifth plane 4211e and a first curved surface 4213a, both of which are used for reflecting light from the carrier layer 410.

[0159] In this way, the first texture pattern formed can have more changes, and thus the interference texture pattern formed can have more changes, and the film sheet 400 can have more changes under different viewing angles.

[0160] In some examples, one side of the reflecting surface that is curved is connected to the connecting surface 4212, and the other side is connected to the reflecting surface that is flat. For example, as shown in FIG. 14, one side of the first curved surface 4213a is connected to the connecting surface 4212, and the other side is connected to one side of the fifth plane 4211e, and the other side of the fifth plane 4211e is connected to the connecting surface 4212.

[0161] FIG. 15 is a schematic view of a carrier layer and a first texture layer of another cover sheet provided by an embodiment of the present application.

[0162] In other examples, the reflecting surface that is curved can be connected to a plurality of reflecting surfaces that are flat, and the reflecting surface that is curved can be connected to the connecting surface through the reflecting surfaces that are flat. For example, the first convex surface can include a sixth plane 4211f, a seventh plane 4211g, and a second curved surface 4213b, all of which are used for reflecting light from the carrier layer 410, the second curved surface 4213b is connected to the sixth plane 4211f and the seventh plane 4211g, and the second curved surface 4213b can be connected to the connecting surface 4212 through the sixth plane 4211f and the seventh plane 4211g.

[0163] For example, the second curved surface 4213b can be located at an end of the first convex surface away from the first side 411.

[0164] FIG. 16 is a schematic view of a carrier layer and a first texture layer of another cover sheet provided by an embodiment of the present application.

[0165] As shown in FIG. 16, the planar reflective surface can be connected with multiple curved reflective surfaces. For example, the first convex surface can include an eighth planar surface 4211h, a third curved surface 4213c and a fourth curved surface 4213d, the eighth planar surface 4211h, the third curved surface 4213c and the fourth curved surface 4213d are all used for reflecting light from the carrier layer 410, the eighth planar surface 4211h is connected with the third curved surface 4213c and the fourth curved surface 4213d, and the eighth planar surface 4211h can be connected with the connecting surface 4212 through the third curved surface 4213c and the fourth curved surface 4213d.

[0166] In some examples, one of the reflective surfaces is a planar surface parallel to the first side surface. For example, the eighth planar surface 4211h is parallel to the first side surface 411.

[0167] For example, the eighth planar surface 4211h can be located at an end of the first convex surface away from the first side surface 411.

[0168] In other examples, at least one of the third curved surface 4213c and the fourth curved surface 4213d can also be replaced by a planar reflective surface.

[0169] The number of planar reflective surfaces and curved reflective surfaces and the connection relationship therebetween on the same first convex surface are not limited in the present application, as long as at least one of the reflective surfaces of the first convex surface is planar.

[0170] FIG. 17 is a schematic view of another cover provided by an embodiment of the present application.

[0171] As shown in FIG. 17, in some possible implementations, the second texture layer 430 includes coloring structures 431 used for forming a second texture pattern. In this way, the second texture pattern can be formed by allowing the coloring structures 431 to be irradiated by reflected light reflected by the first convex surface, and the structure of the second texture layer 430 is less limited, and in this case, the side of the second texture layer 430 away from the carrier layer 410 can be planar, so that it is more convenient to arrange the transparent adhesive layer 470 on the side of the second texture layer 430 away from the carrier layer 410.

[0172] The coloring structures 431 can be structures formed by one or more of ink, colored photoresist and the like.

[0173] In some examples in which the second texture layer 430 includes the coloring structures 431, the second texture layer 430 can further include a substrate structure 432, and the coloring structures 431 can be embedded on the surface of the substrate structure 432 or inside the substrate structure 432.

[0174] The base material structure 432 can be formed of a cured material, which can include but is not limited to a light-cured material or a heat-cured material. For example, the cured material can include but is not limited to an epoxy resin, a phenolic resin, etc.

[0175] In some examples, the base material structure 432 can be formed of a UV-cured glue. The recessed structure can be formed on the side of the UV-cured glue away from the carrier layer 410 by a UV-cured glue imprinting process, so as to form the base material structure 432 with the recessed structure, and then the coloring structure 431 can be embedded in the recessed structure of the base material structure 432.

[0176] In some other examples, the base material structure 432 can be formed of a photoresist. The recessed structure can be formed on the side of the photoresist away from the carrier layer 410 by a photoetching process, so as to form the base material structure 432 with the recessed structure, and then the coloring structure 431 can be embedded in the recessed structure of the base material structure 432.

[0177] The coloring structure 431 can fill the recessed structure of the base material structure 432. Alternatively, the coloring structure 431 can protrude from the side of the base material structure 432 away from the carrier layer 410. Alternatively, the coloring structure 431 can fill part of the recessed structure of the base material structure 432, and the other part of the recessed structure of the base material structure 432 can be filled by another structure layer, for example, the other part of the recessed structure of the base material structure 432 can be filled by the transparent adhesive layer 470.

[0178] In some examples, the second texture layer 430 is in contact with the transparent adhesive layer 470, that is, no other structure layer is arranged between the second texture layer 430 and the transparent adhesive layer 470. In this way, the processing process of the film 400 can be relatively simple, and the cost can be relatively low.

[0179] FIG. 18 is a schematic view of another cover plate provided by an embodiment of the present application.

[0180] As shown in FIG. 18, in some possible implementations, the second texture layer 430 includes a second protruding structure 433 protruding away from the carrier layer 410, and the second protruding structure 433 is used to form a second texture pattern. The second protruding structure 433 includes a second protruding surface protruding from the second side surface 412, and the second protruding surface is used to refract the light rays emitted by the carrier layer 410 toward the second protruding surface. The light rays reflected by the first protruding surface can be refracted when passing through the second protruding surface, so as to form the second texture pattern.

[0181] In this way, the light rays reflected by the first protruding surface can have different directions when being refracted at the second protruding surface, so that different second texture patterns can be formed under different viewing angles, and the change of the interference texture pattern formed can be more rich.

[0182] The second protruding structure 433 can be the same as the first protruding structure 421, or the second protruding structure 433 can be different from the first protruding structure 421.

[0183] In examples where the second textured layer 430 includes the second protruding structure 433, the second protruding structure 433 can be formed of a cured material, which can include but is not limited to a light-cured material or a heat-cured material, for example, the cured material can include but is not limited to an epoxy resin, a phenolic resin, etc.

[0184] In some examples where the second textured layer 430 includes the second protruding structure 433 protruding away from the carrier layer 410, the second protruding structure 433 can be formed of an ultraviolet rays (UV) glue, and the second protruding structure 433 can be formed on the second side surface 412 through a UV glue imprinting process.

[0185] In other examples where the second textured layer 430 includes a plurality of second protruding structures 433 protruding away from the carrier layer 410, the second protruding structure 433 can be formed of a photoresist, and the second protruding structure 433 can be formed on the second side surface 412 through a photoetching process.

[0186] In some examples where the second textured layer 430 includes the colored structure 431, the colored structure 431 can be integrated on the second protruding structure 433, that is, the second protruding structure 433 can be the colored structure 431, or the second protruding structure 433 can include the colored structure 431.

[0187] The second textured layer 430 can include a plurality of second protruding structures 433.

[0188] In some examples, the second protruding structure 433 can be continuously arranged on the second side surface 412.

[0189] In other examples, the second protruding structure 433 can also be arranged on the second side surface 412 at intervals.

[0190] In some examples where the second textured layer 430 includes the second protruding structure 433 protruding away from the carrier layer 410, the transparent adhesive layer 470 is in contact with the second protruding surface, that is, there is no other structure layer between the second protruding surface and the transparent adhesive layer 470, and the refractive index of the transparent adhesive layer 470 is different from the refractive index of the second protruding structure 433. At this time, the transparent adhesive layer 470 can fill the concave structure formed due to the protrusion of the second protruding structure 433.

[0191] In this way, the transparent adhesive layer 470 with a refractive index different from that of the second protruding structure 433 can make the interface at the second protruding surface clear, can improve the clarity of the second texture pattern formed, and can make the interference texture pattern formed at different viewing angles change significantly. In addition, no other structural layer can be arranged between the second protruding surface and the transparent adhesive layer 470, so that the processing process of the film 400 with the second protruding structure 433 is relatively simple, and the cost is relatively low.

[0192] When the second protruding surface is in contact with the transparent adhesive layer 470 and the second side surface 412 is covered by the second protruding structure 433, the transparent adhesive layer 470 is arranged on the surface of the second protruding structure 433, and the transparent adhesive layer 470 covers all the second protruding surfaces of the second protruding structure 433.

[0193] When the second protruding surface is in contact with the transparent adhesive layer 470 and the second side surface 412 includes a third region covered by the second protruding structure 433 and a fourth region not covered by the second protruding structure 433, the transparent adhesive layer 470 is arranged on the surface of the second protruding structure 433 and the fourth region of the second side surface 412, and the transparent adhesive layer 470 covers all the second protruding surfaces of the second protruding structure 433 and the fourth region of the second side surface 412.

[0194] In some examples in which the second texture layer 430 includes the second protruding structure 433 protruding away from the carrier layer 410, the second protruding surface can be a curved surface. In this way, the second texture pattern formed can be relatively rich, and the second texture pattern can change continuously with the change of the viewing angle.

[0195] For example, the second protruding surface can be used to form a lens structure.

[0196] In other examples in which the second texture layer 430 includes the second protruding structure 433 protruding away from the carrier layer 410, the second protruding surface can include one or more planes, or the second protruding surface can include one or more planes and one or more curved surfaces.

[0197] FIG. 19 is a schematic view of another cover plate provided by the embodiments of the present application.

[0198] As shown in FIG. 19, for example, the second protruding surface includes a plurality of refracting surfaces, the refracting surfaces are used to refract light from the carrier layer 410, and at least one refracting surface is a plane. In this way, the brightness and gloss of the interference texture pattern formed can be relatively high.

[0199] In some examples, at least one refracting surface of the second protruding surface is a plane inclined relative to the second side surface 412.

[0200] In some examples, one of the refractive surfaces of the second convex surface is a plane parallel to the second side surface 412.

[0201] In some examples, at least one of the refractive surfaces of the second convex surface is a curved surface.

[0202] In some possible embodiments, the film sheet 400 further comprises a second coating layer 490. The second textured layer 430 is located between the carrier layer 410 and the second coating layer 490, the second convex surface is in contact with the second coating layer 490, and the refractive index of the second coating layer 490 is different from the refractive index of the second convex structure 433.

[0203] In this way, the second convex surface can be clear by the second coating layer 490, the clarity of the second textured pattern formed can be improved, and the interference textured pattern formed under different viewing angles can change significantly. In addition, the appearance effects such as color and transparency of the interference textured pattern formed can be changed by the second coating layer 490, so that the film sheet 400 can provide more abundant appearance effects. In addition, the selection of the transparent adhesive layer 470 can be reduced, and the transparent adhesive layer 470 with the same or similar refractive index as the second convex structure 433 can be selected to bond the film sheet 400.

[0204] When the second convex surface is in contact with the second coating layer 490 and the second side surface 412 is covered by the second convex structure 433, the second coating layer 490 is arranged on the surface of the second convex structure 433, and the second coating layer 490 covers the second convex surface of all the second convex structures 433.

[0205] When the second convex surface is in contact with the second coating layer 490 and the second side surface 412 comprises a third region covered by the second convex structure 433 and a fourth region not covered by the second convex structure 433, the second coating layer 490 is arranged on the surface of the second convex structure 433 and the fourth region of the second side surface 412, and the second coating layer 490 covers the second convex surface of all the second convex structures 433 and the fourth region of the second side surface 412.

[0206] For example, the second coating layer 490 can be formed of one or more of the following materials: magnesium fluoride, titanium dioxide, zirconium oxide, niobium oxide, etc.

[0207] Exemplarily, the second coating layer 490 can be formed by one or more of a non conductive vacuum metalize (NCVM) process, a plasma enhanced chemical vapor deposition (PECVD) process, a metal organic chemical vapor deposition (MOCVD) process, an electrochemical deposition process, a radio frequency (RF) sputtering process, a direct current (DC) sputtering process, etc.

[0208] Exemplarily, the second coating layer 490 can have a thickness of 20-400 nm.

[0209] In some examples in which the film sheet 400 includes the second coating layer 490, a side of the second coating layer 490 facing away from the carrier layer 410 is connected to the transparent adhesive layer 470, which can fill in recessed structures of the second coating layer 490 formed due to the second protruding structures 433 being disposed on the surface of the second coating layer 490.

[0210] In some possible implementations, the second texture layer 430 can include an optical super surface structure for forming the second texture pattern. In this way, the second texture pattern can be formed by refraction of light by the optical super surface structure, which can make the formed second texture pattern more abundant, and thus the formed interference texture pattern more abundant.

[0211] In some examples, the optical super surface structure is a concave-convex structure formed on the second side surface 412. When the optical super surface structure is a concave-convex structure formed on the second side surface 412, the second protruding structure 433 can be an optical super surface unit of the optical super surface structure.

[0212] In some examples in which the second texture layer 430 includes the base material structure 432, the optical super surface structure can be disposed in the base material structure 432, and a side of the second texture layer 430 facing away from the carrier layer 410 can be a plane.

[0213] In some possible implementations, the second texture layer 430 can include a Fabry-Perot resonant cavity structure for forming the second texture pattern. In this way, the second texture pattern can be formed by resonance of light by the Fabry-Perot resonant cavity structure, which facilitates control of the formed second texture pattern.

[0214] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connect", "connection" should be understood as broad, for example, can be fixedly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0215] In the embodiments of the present application or the devices or elements implied by the embodiments of the present application must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0216] The terms "first", "second", "third", "fourth" and the like (if any) in the description of the embodiments of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0217] The term "a plurality of" herein refers to two or more. The term "and / or" herein is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents that the associated objects before and after are in an "or" relationship; in the formula, the character " / " represents that the associated objects before and after are in a "division" relationship.

[0218] It can be understood that the various numbers involved in the embodiments of the present application are only distinguished for the convenience of description, and do not limit the scope of the embodiments of the present application.

[0219] It can be understood that in the embodiments of the present application, the size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims

1. A diaphragm, characterized by The bearing layer, the first texture layer and the second texture layer; The bearing layer has a first side and a second side, the first side and the second side are respectively located on both sides of the thickness direction of the bearing layer, the first texture layer is arranged on the first side, and the second texture layer is arranged on the second side; The first texture layer comprises a first protruding structure protruding away from the bearing layer, and the first protruding structure is used for forming a first texture pattern; The second texture layer is used for forming a second texture pattern, and the first texture pattern and the second texture pattern superimpose to form an interference texture pattern; The first protruding structure comprises a first protruding surface protruding from the first side, and the first protruding surface comprises a plurality of reflecting surfaces, the reflecting surfaces are used for reflecting light rays emitted by the bearing layer to the reflecting surfaces, and at least one of the reflecting surfaces is a plane.

2. The membrane of claim 1, wherein, At least one of the planes is inclined relative to the first side.

3. The diaphragm of claim 2, wherein, The first protruding structure is a convex polyhedral structure.

4. The diaphragm of claim 3, wherein The first protruding surface is composed of a plurality of planes, and each plane is inclined relative to the first side.

5. The diaphragm of claim 1 or 2, wherein At least one of the reflecting surfaces is a curved surface.

6. The membrane according to any one of claims 1 to 5, characterized in that The first protruding structure further comprises a connecting surface connected with the first side, and a projection of the first protruding surface in the thickness direction of the bearing layer is located in a projection of the connecting surface in the thickness direction of the bearing layer.

7. The diaphragm of claim 6, wherein The area surrounded by the contour of the first protruding surface gradually decreases from one end close to the bearing layer to the other end away from the bearing layer.

8. The membrane according to any one of claims 1 to 7, characterized in that In the same first protruding structure, the normals at the centers of all the reflecting surfaces intersect at a same normal intersection point, the distance between the normal intersection point and the end of the first protruding structure away from the bearing layer is L, the distance between the end of the first protruding structure away from the bearing layer and the bearing layer is H1, the thickness of the bearing layer is H2, and L=2(H1+H2).

9. The membrane according to any one of claims 1 to 8, characterized in that, Further comprising a first coating layer; The first texture layer is located between the bearing layer and the first coating layer, the first protruding surface is connected with the first coating layer, and the refractive index of the first coating layer is different from the refractive index of the first protruding structure.

10. The diaphragm of claim 9, wherein, Further comprising an ink layer; The ink layer is located on the side of the first coating layer away from the bearing layer, and the ink layer is arranged on the surface of the first coating layer.

11. The membrane of any one of claims 1-8, wherein, Further comprising an ink layer; The first texture layer is located between the bearing layer and the ink layer, and the first protruding surface is connected with the ink layer.

12. The membrane of any one of claims 1-11, wherein, The second texture layer comprises a coloring structure; The coloring structure is used for forming the second texture pattern.

13. The membrane of any one of claims 1-12, wherein, The second texture layer comprises a second protruding structure protruding away from the bearing layer, and the second protruding structure is used for forming the second texture pattern; The second protruding structure comprises a second protruding surface protruding from the second side, and the second protruding surface is used for refracting light rays emitted by the bearing layer to the second protruding surface.

14. The diaphragm of claim 13, wherein, Further comprising a second coating layer; The second textured layer is located between the carrier layer and the second coating layer, the second convex surface is in contact with the second coating layer, and the refractive index of the second coating layer is different from the refractive index of the second convex structure.

15. The membrane of any one of claims 1-14, wherein, The second textured layer comprises an optical metasurface structure for forming the second texture pattern.

16. The membrane of any one of claims 1-15, wherein, The second textured layer comprises a Fabry-Perot resonant cavity structure for forming the second texture pattern.

17. A cover plate, characterized in that, The film as claimed in any one of claims 1-16 and a light-transmissive substrate; The film is arranged on an inner surface of the substrate, and the second textured layer of the film is located between the substrate and the carrier layer of the film.

18. An electronic device, characterized in that, The cover plate as claimed in claim 17.

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