Terminal cover plate, terminal cover plate manufacturing method and terminal device

Abstract

The present application provides a terminal cover plate and a method for manufacturing the same, as well as a terminal device including the terminal cover plate. The terminal cover plate includes a transparent cover plate body and a hot stamping layer stacked on the cover plate body. The hot stamping layer includes an angular color-changing layer and a metallic luster layer stacked with the angular color-changing layer. The angular color-changing effect refers to the ability to present a variety of different color changes as the viewing angle of the human eye changes, thereby enabling the terminal cover plate to present a light and shadow flow effect. By stacking the metallic luster layer on the angular color-changing layer, the terminal cover plate also has a metallic luster effect. In addition, the metallic luster layer can reflect and refract light, thereby enhancing the light and shadow flow effect of the angular color-changing layer.

Description

Technical Field

[0001] The present application relates to the field of electronic information technology, and in particular to a terminal cover plate and a manufacturing method thereof, and a terminal device including the terminal cover plate. Background Art

[0002] In the terminal consumer goods industry, product appearance may be a decisive factor in determining whether consumers buy products. In the prior art, the cover plates of some terminal devices can present the effect of light and shadow flow, that is, a variety of different color effects can be observed on the terminal cover plate at a certain angle, and after changing the observation angle, a variety of different color effects can also be observed, and the color of the cover plate observed at this angle is different from the color of the cover plate observed at other observation angles. Because the cover plate presenting the light and shadow flow effect has a colorful appearance, it is favored by consumers. Therefore, how to obtain a cover plate with good light and shadow flow effect has become a hot research direction today. Summary of the invention

[0003] The present application provides a terminal cover plate and a manufacturing method thereof as well as a terminal device, aiming to obtain a terminal cover plate with a good light and shadow flowing appearance effect.

[0004] In a first aspect, the present application provides a terminal cover plate. The terminal cover plate comprises a transparent cover plate body and a hot stamping layer stacked on the cover plate body, the hot stamping layer comprises an angular color-changing layer and a metallic luster layer stacked with the angular color-changing layer, the metallic luster layer is located on the side of the angular color-changing layer facing the cover plate body or on the side away from the cover plate body, the angular color-changing layer has an angular color-changing effect, and the angular color-changing layer is formed of an optical color-changing ink or comprises a laser-grade microstructure arranged in a periodic manner.

[0005] Among them, the different angle color effect refers to the ability to present a variety of different colors at a certain angle, and after changing the viewing angle, it can present some other colorful colors. In the present application, the different angle color layer is formed by optical color-changing ink or includes a laser-grade microstructure arranged in a periodic manner, which means that in some embodiments, the different angle color layer is formed by optical color-changing ink, and the components of the optical color-changing ink have some specific structures, so that the different angle color effect can be presented. Alternatively, in some embodiments, the different angle color layer includes a laser-grade microstructure, and the laser-grade microstructure reflects, refracts, diffracts or scatters light, thereby producing a different angle color effect. Among them, the laser-grade microstructure refers to a three-dimensional structure with a size at the nanometer level. In some embodiments of the present application, the microstructure is a micro-dot matrix with a size at the nanometer level, wherein the microstructure can be various pyramid structures such as triangular pyramids and quadrangular pyramids, or can be a parabolic structure with a hemispherical shape and a parabolic outer surface. In some other embodiments of the present application, the microstructure may also be a nanoscale grating structure, and the microstructure is a prism, semi-cylinder or other structure extending on the goniochromic layer.

[0006] In the present application, a hot stamping layer capable of having an angular color-changing effect is formed in a transparent cover body, thereby achieving the effect of light and shadow flow. In addition, in some embodiments, the angular color-changing layer can be obtained by printing or coating with optical color-changing inks, and the formation process is simple, and the manufacturing equipment is simple, so that the effect of light and shadow flow of the terminal cover can be achieved at a lower cost. In some embodiments, a laser-grade microstructure is formed on the angular color-changing layer to form a light and shadow flow effect. In addition, when the microstructure is formed, the size, shape, arrangement period, etc. of the microstructure can be controlled as needed, so that a terminal cover with a good light and shadow flow effect can be obtained. Further, in some embodiments of the present application, a metallic luster layer is stacked on the angular color-changing layer, so that the terminal cover also has a metallic luster effect to enhance the appearance of the terminal cover. In addition, the metallic luster layer can reflect and refract light, etc., to enhance the light and shadow flow effect of the angular color-changing layer. The angular color-changing layer includes a main observation surface and a secondary observation surface opposite to the main observation surface, wherein the main observation surface is smoother than the secondary observation surface; the main observation surface faces the cover body, and the secondary observation surface faces away from the cover body. By facing the main observation surface toward the cover body, the main observation surface of the hot stamping layer can be seen through the cover body, that is, the hot stamping layer with better display effect can be observed from the cover body side, so that the terminal cover has a better appearance effect.

[0007] In some embodiments, a transparent varnish layer is provided between the hot stamping layer and the cover body.

[0008] By stacking a transparent varnish layer between the hot stamping layer and the cover plate body, the hot stamping layer and the cover plate body can be more firmly combined without affecting the appearance of the hot stamping layer on the terminal cover plate.

[0009] In some embodiments, a side of the hot stamping layer facing away from the cover plate body is further laminated with an ink layer, and the ink layer is a non-transparent film layer.

[0010] When the cover body is covered on the terminal device, the ink layer can cover the internal structure of the terminal device, so that the terminal device has a good appearance. In addition, the ink layer is generally an insulating material coating, so that insulation can be achieved through the ink layer to prevent the current inside the terminal device from being conducted to the terminal shell. Furthermore, by covering the hot stamping layer with the ink layer, the hot stamping layer can be isolated from the outside world, preventing the hot stamping layer from being corroded by water, oxygen, etc. from the outside world.

[0011] In some embodiments of the present application, the metallic luster layer is a non-RF shielding layer, that is, the metallic luster layer does not affect the RF signal, so that when the terminal housing is used on a terminal device, the metallic luster layer does not affect the RF signal of the terminal device.

[0012] In some embodiments, the metallic luster layer is a conductive metal film layer, the conductive metal film layer is formed of a conductive metal material, and a hollow pattern is provided on the metallic luster layer. When the hot stamping layer of the metallic luster layer having the hollow pattern is formed on the cover body, the terminal cover has a certain pattern, so that the terminal cover has a better appearance. Moreover, when the terminal cover is a rear cover of a terminal device, the radio frequency signal of the terminal device can be transmitted to the outside world through the hollow structure, thereby avoiding the influence of the metal film layer formed by the metal material on the radio frequency signal of the terminal device.

[0013] In some embodiments, the metallic luster layer is a non-conductive metal film layer, and the optical film layer is formed of a non-conductive metal material. That is, the metallic luster layer is a non-conductive film layer formed of a metal material, so that the metallic luster layer has a metallic luster and does not affect the radio frequency signal of the terminal device. In some embodiments, the angular color-changing layer has two layers, and the metallic luster layer is located between the two angular color-changing layers, so that the effect of light and shadow flow can be observed from the opposite sides of the hot stamping layer.

[0014] In a second aspect, the present application provides a method for manufacturing a terminal cover plate, comprising:

[0015] forming an ink layer on one surface of the release film;

[0016] The hot stamping film and the release film are arranged opposite to each other, so that the orthographic projection of the hot stamping film on the release film is located on the release film, and the hot stamping film faces the side of the release film on which the ink layer is formed, and the hot stamping film comprises a base film, a release layer, a hot stamping layer and an adhesive layer stacked in sequence, and the adhesive layer faces the release film;

[0017] The hot stamping film is pressed onto the release film and heated so that the hot stamping layer and the adhesive layer of the hot stamping film are hot stamped onto the release film, and the base film and the release layer are separated from the hot stamping layer;

[0018] The release film printed with the hot stamping layer and the adhesive layer is arranged opposite to the transparent cover body, and the release film is away from the cover body;

[0019] A transparent adhesive layer is formed on a side of the cover body facing the hot stamping layer or a side of the hot stamping layer facing the cover body;

[0020] Laminating the cover plate body and the release film printed with the hot stamping layer and the adhesive layer through the adhesive layer;

[0021] The release film is removed.

[0022] By first hot stamping the hot stamping layer onto the release film, the main observation surface of the angular color-changing layer is turned away from the release film. Then, the release film laminated with the hot stamping layer is bonded to the cover body through a transparent adhesive layer. At this time, the main observation surface of the angular color-changing layer faces the cover body, so that a better appearance effect can be observed from the cover body side. In addition, through the manufacturing method of the terminal shell of the embodiment of the present application, the decorative layer is located between the cover body and the ink layer, so as to avoid damage to the hot stamping layer and extend the life of the terminal shell. In addition, when the terminal shell is applied to a terminal device, the ink layer can block the internal structure of the terminal device to ensure that the terminal device has a good appearance effect. At the same time, the insulating ink layer can prevent the current inside the terminal device from being transmitted to the terminal shell. In the third aspect, the present application also provides another method for manufacturing a terminal cover, including:

[0023] The hot stamping film is arranged opposite to the transparent cover body, so that the orthographic projection of the hot stamping film on the cover body covers the cover body; the hot stamping film comprises a base film, a release layer, a hot stamping layer and an adhesive layer stacked in sequence, and the adhesive layer faces the cover body;

[0024] The hot stamping film is pressed onto the cover body and heated, so that the hot stamping layer and the adhesive layer of the hot stamping film are hot stamped onto the cover body, and the base film and the release layer are separated from the hot stamping layer.

[0025] Through the manufacturing method of the terminal cover plate of these embodiments, the hot stamping layer can be stamped onto the release film in a simple process, thereby obtaining a terminal cover plate with a light and shadow flow effect.

[0026] In some embodiments of the present application, after the hot stamping film is pressed onto the cover body and heated, the method further includes:

[0027] An ink layer is formed on a side of the hot stamping layer facing away from the cover plate body.

[0028] By forming an ink layer on the side of the gold stamping layer away from the cover body, the decorative layer is located between the cover body and the ink layer, thereby preventing the gold stamping layer from being damaged and extending the life of the terminal shell. In addition, when the terminal shell is applied to a terminal device, the ink layer can shield the internal structure of the terminal device to ensure that the terminal device has a good appearance. At the same time, the insulating ink layer can prevent the current inside the terminal device from being transmitted to the terminal shell.

[0029] In some embodiments of the present application, before the hot stamping film is pressed onto the cover body and heated, the method further includes:

[0030] A transparent varnish layer is arranged on the cover plate body, and the transparent varnish layer faces the hot stamping film.

[0031] By forming a transparent varnish layer on the cover body before laminating the cover body and the hot stamping layer, the hot stamping layer and the cover body can be more firmly combined without affecting the appearance of the hot stamping layer on the terminal cover.

[0032] In a fourth aspect, the present application provides a terminal device. The terminal device comprises a terminal cover plate as described in any one of the above items, wherein the terminal cover plate is a front cover plate and / or a rear cover plate of the terminal device, and the hot stamping layer is located on a side of the cover plate body of the terminal cover plate facing the inside of the terminal device. This is to avoid the hot stamping layer being located outside the terminal device and causing wear and tear due to friction with external objects, or being corroded by external water, oxygen, etc., thereby extending the life of the hot stamping layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the structural features and functions of the present application, it is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a schematic diagram of the structure of a terminal device according to an embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the structure of a terminal cover plate according to an embodiment of the present application;

[0036] Figure 3 for Figure 2 A partial cross-sectional schematic diagram of the terminal cover plate of the illustrated embodiment along direction II;

[0037] Figure 4 A partial cross-sectional schematic diagram of a terminal cover plate along direction II of another embodiment of the present application;

[0038] Figure 5 for Figure 4 A schematic diagram of a partial structure of the surface of the angular color-changing layer of the terminal cover plate of the embodiment shown;

[0039] Figure 6 This is a schematic structural diagram of a metallic glossy layer of a terminal cover plate according to an embodiment of the present application;

[0040] Figure 7 Another embodiment of the present application is a terminal cover along Figure 2 A partial cross-sectional schematic diagram in the II direction is shown;

[0041] Figure 8 Another embodiment of the present application is a terminal cover along Figure 2 A partial cross-sectional schematic diagram in the II direction is shown;

[0042] Fig. 9 Another embodiment of the present application is a terminal cover along Figure 2 A partial cross-sectional schematic diagram in the II direction is shown;

[0043] Fig.10 for Figure 3 A flow chart of a method for manufacturing the terminal cover shown;

[0044] Figure 11-Figure 15 for Fig.10 A schematic cross-sectional view of the terminal cover plate at each step of the manufacturing method;

[0045] Fig.16 for Figure 3 A flow chart of another method for manufacturing the terminal cover is shown. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0047] The present application provides a terminal cover plate and a method for making the same, as well as a terminal device including the terminal cover plate. The terminal device may be a mobile phone, a tablet, a smart watch, etc. The terminal device in some embodiments includes a front cover plate and a rear cover plate opposite to the front cover plate. The terminal cover plate may be the front cover plate and / or the rear cover plate of the terminal device, that is, the terminal cover plate may be the front cover plate of the terminal device, so that the front cover plate of the terminal device has a light and shadow flowing effect; or the terminal cover plate may be the rear cover plate of the terminal device, so that the rear cover plate of the terminal device has a light and shadow flowing effect; or, the terminal cover plate may also be the front cover plate and the rear cover plate of the terminal device, so that the front cover plate and the rear cover plate of the terminal cover plate can both achieve the light and shadow flowing effect. It can be understood that the light and shadow flowing effect of the terminal cover plate may mean that each position of the terminal cover plate has the light and shadow flowing effect, or it may mean that a part of the area of ​​the terminal cover plate has the light and shadow flowing effect.

[0048] See also Figure 1 , Figure 1 The structure diagram of the terminal device 1000 of an embodiment of the present application is shown. The terminal device 1000 includes a front cover plate 110, a rear cover plate 120 opposite to the front cover plate 110, and a middle frame 130 connected between the front cover plate 110 and the rear cover plate 120. In some embodiments, the terminal device 1000 also includes a display screen 140, and the front cover plate 110 covers the display screen 140. When the terminal housing is the front cover plate 110, the terminal housing has a light and shadow flow effect only at the non-display area of ​​the display screen 140, avoiding the influence on the display screen 140.

[0049] See also Figure 2 and Figure 3 , Figure 2 FIG. 1 is a schematic diagram of the structure of a terminal cover plate 100 according to an embodiment of the present application. Figure 3 for Figure 2 The terminal cover plate 100 is a schematic cross-sectional view in the II direction. In this embodiment, the terminal cover plate 100 includes a transparent cover plate body 10 and a hot stamping layer 20 stacked on the cover plate body 10, and the hot stamping layer 20 includes an angular color-changing layer 21 and a metallic luster layer 22, and the angular color-changing layer 21 has an angular color-changing effect. The angular color-changing effect refers to the ability to present a variety of different colors at a certain angle, and with the change of the viewing angle, other colorful color effects can be presented, that is, the effect of light and shadow flow can be achieved through the angular color-changing layer 21.

[0050] In some embodiments of the present application, the different-angle color-changing layer 21 is formed by optical color-changing ink. Among them, the optical color-changing ink can be formed by laser ink or chameleon ink and other inks that can have different-angle color-changing effects. Specifically, the optical color-changing ink can interfere with light, thereby separating white light into other components, and presenting a variety of colors as the observation angle changes, thereby achieving the effect of light and shadow flow. For example, in some embodiments, the main components of the optical color-changing ink are specially treated flake metal aluminum / oxides and the like and dispersants. Through the interference of flake metal aluminum / oxides and the like with light, white light is separated into other components, and presents a variety of colors as the observation angle changes, thereby achieving the effect of light and shadow flow. In addition, in some embodiments, different pigment components can be mixed in different optical color-changing inks, so that the different-angle color-changing layer 21 formed by different optical color-changing inks can present different main colors.

[0051] See also Figure 4 and Figure 5 In some other embodiments of the present application, the angular color-changing layer 21 includes periodically arranged microstructures 211, and the angular color-changing effect is achieved by the reflection, refraction, diffraction or scattering of light by the microstructures 211. Specifically, the angular color-changing layer 21 includes a base layer 212, and the microstructure 211 is formed on a surface of the base layer 212. In some embodiments of the present application, the base layer 212 and the microstructure 211 are an integral structure. The microstructure 211 refers to a three-dimensional structure with a size below the micron level. In some embodiments of the present application, the microstructure 211 is a three-dimensional structure with a size of laser level. Among them, the laser-level microstructure 211 refers to a three-dimensional structure with a size of nanometer level. In some embodiments of the present application, the microstructure 211 can be of any shape according to actual needs. For example, in some embodiments, the microstructure 211 is a micro-dot matrix with a size at the nanometer level, wherein the microstructure 211 can be a triangular pyramid, a quadrangular pyramid or other pyramidal structures, or a hemispherical parabolic structure with a parabolic outer surface. In some other embodiments of the present application, the microstructure 211 can also be a nanometer-level grating structure, wherein the microstructure 211 is a prism, a semi-cylinder or other structure extending on the goniochromic layer, that is, the cross section of the microstructure perpendicular to its length direction can be a sawtooth or wavy structure. For example, Figure 5 In the illustrated embodiment, the microstructure 211 is located in the angular color-changing layer 21 and is away from the microstructure 211, and is a quadrangular prism structure, with a depth (in the Z direction as shown in the figure, wherein the Z direction is perpendicular to the X and Y directions in the figure) of approximately 200 nm, and a period of the microstructure 211 (i.e., the distance between the centers of adjacent microstructures 211, as shown in the X direction in the figure) of approximately 300 nm.

[0052] Among them, the microstructure 211 can be obtained by UV transfer, or by computer dot matrix lithography technology, 3D true color holographic technology, multiple and dynamic imaging technology, etc., through molding and other processes, so that the angular color-changing layer 21 presents a holographic image with special effects such as rainbow dynamics and three-dimensional stereoscopic effects, so that the hot stamping layer 20 has a better appearance effect.

[0053] The metallic luster layer 22 is stacked with the angular color-changing layer 21, and the metallic luster layer 22 is located on the side of the angular color-changing layer 21 facing the cover body 10 or away from the cover body 10. In this embodiment, the metallic luster layer 22 is located on the side of the angular color-changing layer 21 facing the cover body 10. The metallic luster layer 22 has a certain metallic luster, so that the terminal cover 100 has a certain metallic luster, achieving a more beautiful appearance. Moreover, in the present application, the thickness of the metallic luster layer 22 is relatively thin, so that it has a certain transparent effect. When the metallic luster layer 22 is stacked on the angular color-changing layer 21, the appearance effect of the angular color-changing layer 21 can be displayed through the metallic luster layer 22, so that the terminal cover 100 has both a light and shadow flow effect and a certain metallic luster, so that the terminal cover 100 has a good appearance effect. Furthermore, the metallic luster layer 22 can reflect and refract light, thereby enhancing the light and shadow flow effect of the angular color-changing layer 21 .

[0054] Furthermore, the angular color-changing layer 21 includes a main observation surface 213 and a secondary observation surface 214 opposite to the main observation surface 213, and the main observation surface 213 is smoother than the secondary observation surface 214, so that the hot stamping layer 20 seen from the main observation surface 213 has a better appearance effect than the hot stamping layer 20 seen from the secondary observation surface 214. In some embodiments of the present application, the main observation surface 213 is a side of the base layer 212 of the angular color-changing layer 21 away from the microstructure 211, and the secondary observation surface 214 is the outer surface of the microstructure 211 stacked on the base layer 212 away from the base layer 212. In some embodiments, the main observation surface 213 of the hot stamping layer 20 is closer to the terminal cover plate 100 body relative to the secondary observation surface 214, so that the main observation surface 213 of the hot stamping layer 20 can be seen through the cover plate body 10, that is, the hot stamping layer 20 with better display effect can be observed from the side of the cover plate body 10, so that the terminal cover plate 100 has a better appearance effect.

[0055] It is understandable that when a part of the terminal cover plate 100 has a light and shadow flow effect, that is, a part of the transparent cover plate body 10 is laminated with the hot stamping layer 20. For example, in some embodiments, the hot stamping layer 20 can be patterned to form a logo or trademark, and the patterned hot stamping layer 20 is laminated on the cover plate body 10, so as to form a logo with a light and shadow flow effect on the terminal cover plate 100, so that the terminal device with the terminal cover plate 100 has a good appearance effect.

[0056] Furthermore, when the terminal cover plate 100 is used on the terminal device, the hot stamping layer 20 is located on the side of the cover plate body 10 of the terminal cover plate 100 facing the inside of the terminal device, thereby preventing the hot stamping layer 20 from being corroded by external water, oxygen, etc. or damaged by friction from external objects.

[0057] Furthermore, in some embodiments of the present application, an adhesive layer 30 is provided between the hot stamping layer 20 and the cover body 10, and the hot stamping layer 20 and the cover body 10 are bonded together by the adhesive layer 30. Moreover, in the embodiments of the present application, the adhesive layer 30 is a colorless and transparent layer to avoid the adhesive layer 30 affecting the color rendering effect of the hot stamping layer 20.

[0058] In the present application, the effect of light and shadow flow is achieved by forming a hot stamping layer 20 with an angular color-changing effect in a transparent cover body 10. In addition, in some embodiments, the angular color-changing layer 21 can be obtained by printing or coating with optical color-changing ink, and the formation method is simple and the manufacturing equipment is simple, so that the effect of light and shadow flow of the terminal cover 100 can be achieved at a low cost. In some embodiments, a laser-grade microstructure 211 is formed on the angular color-changing layer 21 to form a light and shadow flow effect. In addition, when the microstructure 211 is formed, the size, shape, arrangement period, etc. of the microstructure 211 can be controlled as needed, so that a terminal cover 100 with a good light and shadow flow effect can be obtained. Further, in some embodiments of the present application, a metallic luster layer 22 is stacked on the angular color-changing layer 21, so that the terminal cover 100 also has a metallic luster effect to enhance the appearance of the terminal cover 100. Furthermore, the metallic luster layer 22 can reflect and refract light, thereby enhancing the light and shadow flow effect of the angular color-changing layer 21 .

[0059] The cover body 10 can be made of various transparent materials such as glass and plastic. In this embodiment, the cover body 10 is made of glass, has high transparency and good touch. The cover body 10 includes a first surface 11 facing the interior of the terminal device when it is arranged on the terminal device and a second surface 12 facing away from the interior of the terminal device. The hot stamping layer 20 can be stacked on the first surface 11 or the second surface 12. In this embodiment, the hot stamping layer 20 is stacked on the first surface 11 of the cover body 10, so that the cover body 10 can protect the hot stamping layer 20 to prevent the hot stamping layer 20 from being worn or corroded.

[0060] In some embodiments, the metallic gloss layer 22 is a non-RF shielding layer, that is, the metallic gloss layer 22 will not affect the RF signal, so that when the terminal cover plate 100 is used on a terminal device, the metallic gloss layer 22 will not affect the RF signal of the terminal device.

[0061] Specifically, in some embodiments of the present application, the metallic luster layer 22 is a conductive metal film layer. Specifically, the conductive metal film layer is formed by a conductive metal material, and the conductive metal film layer has a conductive effect. For example, the conductive metal film layer can be a film layer formed by various coating methods such as evaporation or magnetron sputtering of materials with good metallic luster and decorative effects such as metal aluminum, metal silver, and metal gold, so that the conductive metal film layer has good metallic luster. In this embodiment, the material forming the conductive metal film layer is metal aluminum, which can be evaporated and deposited on the angular discoloration layer 21 by evaporation.

[0062] See also Figure 6 In some embodiments of the present application, a hollow pattern 221 is provided on the metallic luster layer 22. The hollow pattern 221 can be designed as a pattern or line with a certain appearance as needed. When the hot stamping layer 20 of the metallic luster layer 22 with the hollow pattern 221 is formed on the cover body 10, the terminal cover 100 has a certain pattern, so that the terminal cover 100 has a better appearance. In addition, when the terminal cover 100 is the back cover of the terminal device, the radio frequency signal of the terminal device can be transmitted to the outside through the hollow structure, thereby avoiding the influence of the metal film layer formed by the metal material on the radio frequency signal of the terminal device. It can be understood that in some embodiments, when the influence of the metallic luster layer 22 on the radio frequency signal does not need to be considered, the conductive metal film layer may not have the hollow pattern. For example, in some embodiments, when the hot stamping layer 20 only covers a part of the cover body 10, it will not affect the radio frequency signal of the terminal device. At this time, it is not necessary to consider the influence of the metallic luster layer 22 on the radio frequency signal.

[0063] In some other embodiments of the present application, the metallic gloss layer 22 may be a non-conductive metal film layer, that is, the metallic gloss layer 22 is a non-conductive film layer formed of a metal material, so that the metallic gloss layer 22 has a metallic gloss and does not affect the radio frequency signal of the terminal device. Specifically, the metal material may be metal tin, metal indium, indium tin alloy, etc. Moreover, the thickness of the non-conductive metal film layer is less than 30nm. It is understandable that in other embodiments of the present application, other metal materials may be selected, and the thickness of the metallic gloss layer 22 may be adaptively controlled so that the metallic gloss layer 22 formed of the metal material is non-conductive, so as to obtain the desired non-conductive metal film layer. Please refer to Figure 7 In some embodiments of the present application, the angular color-changing layer 21 has two layers, and the metallic luster layer 22 is located between the two layers of the angular color-changing layer 21, so that the effect of light and shadow flow can be observed from opposite sides of the hot stamping layer 20.

[0064] Please review Figure 8 In some embodiments of the present application, a transparent varnish layer 40 is further provided between the hot stamping layer 20 and the cover body 10. By stacking the transparent varnish layer 40 between the hot stamping layer 20 and the cover body 10, the hot stamping layer 20 and the cover body 10 can be more firmly combined without affecting the appearance of the hot stamping layer 20 on the terminal cover 100.

[0065] Please review Fig. 9 In some embodiments, the side of the hot stamping layer 20 facing away from the cover body 10 is also laminated with an ink layer 50. The ink layer 50 is formed of opaque ink. When the cover body 10 is covered on the terminal device, the ink layer 50 can block the internal structure of the terminal device so that the terminal device has a good appearance. In addition, the ink layer 50 is generally an insulating material coating, so that insulation can be achieved through the ink layer to prevent the current inside the terminal device from being conducted to the terminal housing. Furthermore, by covering the hot stamping layer 20 with the ink layer 50, the hot stamping layer 20 can be separated from the outside world to prevent corrosion of the hot stamping layer 20 by external water, oxygen, etc. In one embodiment of the present application, the ink layer 50 is black ink to have a better light-shielding effect.

[0066] See also Fig.10 The present application provides a method for manufacturing a terminal cover plate 100 to form the terminal cover plate 100 described in each embodiment of the present application. Specifically, the method includes:

[0067] Step 1: Please refer to Fig.11, an ink layer 50 is formed on one surface of the release film 70. The ink layer 50 may be formed by scraping, screen printing or inkjet printing.

[0068] Step 2: Please refer to Fig.12 , the hot stamping film 60 and the release film 70 are arranged opposite to each other, so that the orthographic projection of the hot stamping film 60 on the release film 70 is located on the release film 70. The hot stamping film 60 includes a base film 61, a release layer 62, a hot stamping layer 20 and an adhesive layer 63 stacked in sequence, and the adhesive layer 63 faces the release film 70. The hot stamping layer 20 can be the hot stamping layer 20 in any of the above embodiments.

[0069] It is understandable that in some embodiments, the hot stamping film 60 needs to be prepared before step 1. According to the different types of the hot stamping layer 20, the types of the hot stamping film 60 are different, that is, the types of the hot stamping film 60 prepared are different. For example, when the hot stamping layer 20 is Figure 3 When the hot stamping layer 20 of the embodiment shown is used, the hot stamping film 60 is prepared by the following steps:

[0070] forming a release layer 62 on the base film 61;

[0071] The angular color-changing layer 21 is formed on the release layer 62. In some embodiments of the present application, the angular color-changing layer 21 is formed by using optical color-changing ink by scraping, screen printing or inkjet printing. Since the angular color-changing layer 21 is formed by scraping, screen printing or the like, the side of the angular color-changing layer 21 that is away from the release layer 62 is relatively rough. Generally, the surface of the release layer 62 on the base film 61 is relatively smooth, that is, the side of the angular color-changing layer 21 that is in contact with the release layer 62 is relatively smooth, so that the side of the angular color-changing layer 21 facing the release layer 62 is smoother than the side away from the release layer 62, so that the final hot stamping layer 20 has the main observation surface 213 and the secondary observation surface 214 opposite to the main observation surface 213. The hot stamping layer 20 seen from the main observation surface 213 is smoother than the hot stamping layer 20 seen from the secondary observation surface 214, and has a better appearance. In other embodiments of the present application, the angular color-changing layer 21 includes a periodically arranged microstructure. The angular color-changing layer 21 with a microstructure is obtained by UV transfer, and can also be obtained by computer dot matrix lithography technology, 3D true color holographic technology, multiple and dynamic imaging technology, etc., through molding and other processes, so that the angular color-changing layer 21 presents a holographic image with special effects such as rainbow dynamics and three-dimensional effects, so that the hot stamping layer 20 has a better appearance effect.

[0072] The metallic luster layer 22 is formed on the goniochromic layer 21. Depending on the metallic luster layer 22, the metallic luster layer 22 is formed in different ways. For example, when the metallic luster layer 22 is a conductive metal film layer or a non-conductive metal film layer, the metallic luster layer 22 can be formed by evaporation coating, magnetron sputtering, etc.; when the metallic luster layer 22 is an optical film layer, the metallic luster layer 22 can be formed by vapor deposition. In one embodiment of the present application, the metallic luster layer 22 is an aluminum plating layer, which is formed by evaporation coating;

[0073] An adhesive layer 63 is formed on the metallic luster layer 22. The adhesive layer 63 can be formed by coating or inkjet printing. Fig.13 The hot stamping film 60 is pressed onto the release film 70 and heated, so that the hot stamping layer 20 and the adhesive layer 63 of the hot stamping film 60 are stamped onto the release film 70 , and the base film 61 and the release layer 62 are separated from the hot stamping layer 20 .

[0074] In the present application, the size of the release film 70 is greater than or equal to the size of the hot stamping film 60 , so that the hot stamping layer 20 and the adhesive layer 63 of the decorative layer can be hot stamped onto the release film 70 .

[0075] The hot stamping process specifically includes:

[0076] The hot stamping film 60 and the release film 70 are pressed together from the side of the base film 61 of the hot stamping film 60 away from the angular color-changing layer 21 by a hot stamping head with a certain temperature. The adhesive layer 63 melts and becomes sticky after being heated. When the hot stamping head presses the hot stamping film 60 onto the cover body 10, the adhesive layer 63 adheres the hot stamping layer 20 and the release film 70 together. In addition, the release layer 62 melts and separates from the hot stamping layer 20, so that the hot stamping layer 20 and the adhesive layer 63 are hot stamped onto the release film 70, and the release layer 62 and the base film 61 are separated from the hot stamping layer 20.

[0077] It is understandable that, in some embodiments, when the metallic gloss layer of the hot stamping layer 20 has a certain hollow pattern 221, the hollow pattern 221 can be formed on the metallic gloss layer by a patterning process when the metallic gloss layer 20 of the hot stamping film 60 is formed. Alternatively, in step 2, a groove pattern corresponding to the desired pattern is provided on the side of the hot stamping head facing the hot stamping layer 20, that is, the groove on the hot stamping head corresponds to the groove pattern required for the hot stamping layer 20. When the hot stamping head presses the hot stamping layer 20 to fit the cover body 10, the portion of the hot stamping layer 20 corresponding to the groove of the hot stamping head will not be subjected to pressure and will not have a sufficiently high temperature, so that the portion of the hot stamping layer 20 cannot be hot stamped onto the release film 70, so that the hot stamping layer 20 attached to the release film 70 has a hollow pattern 221.

[0078] Step 4: Please refer to Fig.14 The release film 70 printed with the hot stamping layer 20 and the adhesive layer 63 is disposed opposite to the transparent cover body 10 , and the release film 70 is away from the cover body 10 .

[0079] Step 5: Form a transparent adhesive layer on one side of the cover body 10 or one side of the hot stamping layer 20, and the transparent adhesive layer is the adhesive layer 30. The transparent adhesive layer can be formed on the side of the cover body 10 facing the release film 70 or the side of the hot stamping layer 20 facing the cover body 10 by various methods such as scraping, screen printing, inkjet printing, etc. The transparent adhesive layer refers to a transparent adhesive layer. The adhesive layer can be optical adhesive or other types of adhesive materials.

[0080] It is understandable that the order of step 4 and step 5 can be swapped.

[0081] Step 6: See Fig.15 The cover body 10 is laminated to the release film 70 printed with the hot stamping layer 20 and the adhesive layer 63 through the transparent adhesive layer.

[0082] Step 7: Tear off the release film 70 to obtain the required terminal cover plate 100.

[0083] In some embodiments of the present application, after step 4 and before step 5, the following steps are further included:

[0084] A transparent varnish layer 40 is formed on one side of the cover body 10 facing the hot stamping layer 20. By forming the transparent varnish layer 40 between the hot stamping layer 20 and the cover body 10 before the hot stamping layer 20 and the cover body 10 are attached, the hot stamping layer 20 and the cover body 10 can be more firmly combined without affecting the appearance of the hot stamping layer 20 on the terminal cover 100.

[0085] In the manufacturing method of the terminal cover plate of these embodiments of the present application, the main observation surface 213 of the angular discoloration layer 21 is away from the release film 70 by first stamping the hot stamping layer 20 onto the release film 70. Then, the release film 70 laminated with the hot stamping layer 20 is bonded to the cover plate body 10 through a transparent adhesive layer. At this time, the main observation surface 213 of the angular discoloration layer 21 faces the cover plate body 10, so that a better appearance effect can be observed from the cover plate body 10 side. In addition, in the present application, the hot stamping layer 20 is located between the cover plate body 10 and the ink layer 50, so that the hot stamping layer 20 is prevented from being corroded by external water, oxygen, etc., and is prevented from being damaged by wear and tear, thereby extending the life of the terminal cover plate 100. In addition, when the terminal cover plate 100 is used on a terminal device, the ink layer 50 can shield the internal structure of the terminal device, so that the terminal device has a better appearance effect. At the same time, the insulating ink layer 50 can prevent the current inside the terminal device from being transmitted to the terminal housing.

[0086] See also Fig.16 The present application also provides another method for manufacturing the terminal cover plate 100 to form the terminal cover plate 100 described in each embodiment of the present application. Specifically, it includes:

[0087] Step 8: The hot stamping film 60 is arranged opposite to the transparent cover body 10, so that the orthographic projection of the hot stamping film 60 on the cover body 10 covers the cover body 10. The hot stamping film 60 includes a base film 61, a release layer 62, a hot stamping layer 20 and an adhesive layer 63 stacked in sequence, and the adhesive layer 63 faces the cover body 10. The hot stamping layer 20 can be the hot stamping layer 20 in any of the above embodiments.

[0088] Step 9: Press the hot stamping film 60 onto the cover body 10 and heat it, so that the hot stamping layer 20 and the adhesive layer 63 of the hot stamping film 60 are stamped onto the cover body 10, and the base film 61 and the release layer 62 are separated from the hot stamping layer 20, so as to obtain the terminal cover 100. The adhesive layer 63 is the adhesive layer 30 of the terminal cover 100.

[0089] Furthermore, in some embodiments of the present application, after completing step 9, step 10 is also included:

[0090] An ink layer 50 is formed on the side of the hot stamping layer 20 away from the cover body 10, so that the hot stamping layer 20 is located between the cover body 10 and the ink layer 50, so as to prevent the hot stamping layer 20 from being corroded by external water, oxygen, etc., and from being damaged by wear and tear, thereby extending the life of the terminal cover 100. In addition, when the terminal cover 100 is used on a terminal device, the ink layer 50 can shield the internal structure of the terminal device, so that the terminal device has a better appearance. At the same time, the insulating ink layer 50 can prevent the current inside the terminal device from being transmitted to the terminal shell.

[0091] Furthermore, in some embodiments of the present application, before step 9 or step 8, step 11 is also included:

[0092] A transparent varnish layer 40 is disposed on the cover body 10, and the transparent varnish layer 40 faces the hot stamping film 60. By forming the transparent varnish layer 40 between the hot stamping layer 20 and the cover body 10 before the hot stamping layer 20 is attached to the cover body 10, the hot stamping layer 20 and the cover body 10 can be more firmly combined, and the appearance of the hot stamping layer 20 on the terminal cover 100 is not affected.

[0093] In the manufacturing method of the terminal cover plate of these embodiments, the hot stamping layer 20 is stamped onto the release film 70 in a simple manner, thereby obtaining a terminal cover plate with a light and shadow flow effect. In addition, the hot stamping layer 20 is located between the cover plate body 10 and the ink layer 50 to prevent the hot stamping layer 20 from being damaged, thereby extending the life of the terminal cover plate 100.

[0094] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A terminal cover plate, characterized in that: The invention comprises a transparent cover body and a hot stamping layer stacked on the cover body, wherein the hot stamping layer comprises an angular color-changing layer and a metallic luster layer stacked with the angular color-changing layer; the metallic luster layer is located on a side of the angular color-changing layer away from the cover body; the angular color-changing layer has an angular color-changing effect, the angular color-changing layer comprises a laser-grade microstructure arranged in a periodic manner, the angular color-changing layer comprises a base layer, the microstructure is formed on one surface of the base layer, the base layer and the microstructure are an integral structure, and the microstructure is a pyramid structure, a parabolic structure or a grating structure; The goniochromic layer comprises a main observation surface and a secondary observation surface opposite to the main observation surface, wherein the main observation surface faces the cover plate body, and the secondary observation surface faces away from the cover plate body, the main observation surface is a side surface of the base layer away from the microstructure, and the secondary observation surface is a side surface of the microstructure away from the base layer; The main observation surface is attached to the cover plate body via an adhesive layer; The light passes through the cover body and the adhesive layer in sequence and then enters the goniochromic layer from the main observation surface. After a part of the light is reflected by the secondary observation surface, it is emitted through the main observation surface, the adhesive layer and the cover body to form a first light. Another part of the light is refracted at the secondary observation surface, then reflected by the metallic luster layer, and then emitted through the goniochromic layer, the adhesive layer and the cover body to form a second light. The second light merges with the first light.

2. The terminal cover plate according to claim 1, characterized in that: A transparent varnish layer is provided between the hot stamping layer and the cover plate body.

3. The terminal cover plate according to claim 1, characterized in that: The side of the hot stamping layer facing away from the cover plate body is also laminated with an ink layer, and the ink layer is a non-transparent film layer.

4. The terminal cover plate according to claim 1, characterized in that: The metallic luster layer is a non-radio frequency shielding layer.

5. The terminal cover plate according to claim 4, characterized in that: The metallic luster layer is a conductive metal film layer, the conductive metal film layer is formed of a conductive metal material, and a hollow pattern is arranged on the metallic luster layer.

6. The terminal cover plate according to claim 4, characterized in that: The metallic luster layer is a non-conductive metal film layer, and the non-conductive metal film layer is formed of a non-conductive metal material.

7. A method for manufacturing a terminal cover plate, used for manufacturing the terminal cover plate according to any one of claims 1 to 6, characterized in that: include: forming a release layer on the base film; forming the anisochromic layer on the release layer; forming the metallic luster layer on the goniochromic layer; forming the adhesive layer on the metallic luster layer to form a hot stamping film; forming an ink layer on one surface of the release film; The hot stamping film and the release film are arranged opposite to each other, so that the plane where the orthographic projection of the hot stamping film is located on the release film is located on the release film, and the hot stamping film faces the side of the release film on which the ink layer is formed, and the hot stamping film comprises the base film, the release layer, the hot stamping layer and the adhesive layer stacked in sequence, and the adhesive layer faces the release film; Laminating the hot stamping film to the release film and heating the hot stamping film so that the hot stamping layer and the adhesive layer are hot stamped onto the ink layer, and the base film and the release layer are separated from the hot stamping layer; The release film printed with the hot stamping layer and the adhesive layer is arranged opposite to the cover body, and the release film is away from the cover body; Forming a transparent adhesive layer on one side of the cover body or one side of the hot stamping layer; Laminating the cover body and the release film printed with the hot stamping layer and the adhesive layer through the adhesive layer; The release film is removed.

8. The method for manufacturing the terminal cover plate according to claim 7, characterized in that: Before the hot stamping film is pressed onto the cover body and heated, the method further comprises: A transparent varnish layer is arranged on the cover plate body, and the transparent varnish layer faces the hot stamping film.

9. A terminal device, characterized in that: It comprises the terminal cover plate as described in any one of claims 1-6, wherein the terminal cover plate is the front cover plate and / or the rear cover plate of the terminal device, and the hot stamping layer is located on the side of the cover plate body of the terminal cover plate facing the inside of the terminal device.

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