WO2019214390A1

WO2019214390A1 - Decorative functional film and electronic device rear cover module

Info

Publication number: WO2019214390A1
Application number: PCT/CN2019/082292
Authority: WO
Inventors: 高育龙
Original assignee: 昇印光电（昆山）股份有限公司
Priority date: 2018-05-09
Filing date: 2019-04-11
Publication date: 2019-11-14

Abstract

Disclosed are a decorative functional film (100) and an electronic device rear cover module (300) with the decorative functional film (100). The decorative functional film (100) comprises: a micro-nano layer (11) comprising a plurality of protrusions and/or micro-nano structures (111) arranged in a recessed manner; a reflecting layer (12) covering the micro-nano layer (11); a colouring layer (13) covering the reflecting layer (12); and a functional layer (14) comprising a conductive layer (341). The decorative functional film (100) is both decorative and functional.

Description

Decorative functional film and electronic device back cover module

This application is required to be submitted to the China Patent Office on July 2, 2018, the application number is 201810704518.1, and the application name is “decorative functional film and electronic device back cover module” and submitted to the Chinese Patent Office and application number on May 09, 2018. The priority of the Chinese Patent Application No. 20 181 043 944, the entire disclosure of which is incorporated herein by reference.

Technical field

The present application relates to the technical field of electronic products, and in particular, to a decorative functional film and an electronic device back cover module.

Background technique

With the continuous development of electronic technology, consumer electronics products are getting closer to people's lives. For example, a smart phone has become an indispensable companion for consumers to carry around. Consumers are also paying more and more attention to the experience, but the appearance and functions of existing smartphones tend to be homogenized and cannot meet individual needs. In this way, the differentiation of appearance and function has become a breakthrough point for smartphones. For example, the back cover of a smart phone is one of the important components of a mobile phone, but the existing smart phone back cover is a structural component with a single appearance.

Application content

Based on this, it is necessary to provide a decorative film to solve the above technical problems.

One technical solution of the decorative film of the present application is:

A decorative functional film comprising:

a micro-nano layer comprising a plurality of protrusions and/or recessed micro-nano structures;

a reflective layer overlying the micro-nano layer;

a colored layer disposed on the reflective layer;

A functional layer comprising a conductive layer.

In one embodiment, the carrier layer is further disposed on the carrier layer, and the functional layer is disposed on the colored layer or the carrier layer.

In one embodiment, the conductive layer comprises a conductive solid line or a conductive mesh.

In one embodiment, the conductive solid line or the conductive mesh is colorless and transparent.

In one embodiment, the functional layer further includes an insulating protective layer overlying the conductive layer, the conductive layer further including a contact portion not covered by the insulating protective layer.

In one embodiment, the functional layer includes at least one of an antenna module, a display module, a touch module, a wireless charging module, an NFC module, and an light emitting module.

In one embodiment, the display module includes at least one of an OLED display layer, an LED display layer, and a liquid crystal display layer.

In one embodiment, the colored layer is further included, or the carrier layer is a colored PET layer.

In one embodiment, further comprising a second micro/nano layer on either side of the carrier layer, the micro-nano layer and the second micro-nano layer each exhibit an optical effect, or the micro-nano layer and the The second micro/nano layers interfere with each other to form an optical effect.

In one embodiment, the image layer is disposed on either side of the carrier layer, and the image layer is adapted to the micro-nano layer to form an image and/or the graphic layer corresponds to a functional layer.

In one embodiment, the micro/nano structure is at least one of a linear cylindrical mirror, a non-linear cylindrical mirror, a microlens, a small short line, a Fresnel lens, a wire drawing, and a CD pattern.

The present application also discloses an electronic device back cover module comprising a decorative functional film as described above.

The beneficial effects of the present application: the decorative functional film is provided with a micro-nano layer, a reflective layer, a colored layer and a functional layer, which are both decorative and functional.

DRAWINGS

Figure 1 is a schematic cross-sectional view of a decorative functional film of the present application;

2 is a schematic cross-sectional view showing another decorative functional film of the present application;

Figure 3 is a schematic cross-sectional view showing another decorative functional film of the present application;

Figure 4 is a schematic cross-sectional view showing another decorative functional film of the present application;

Figure 5 is a schematic cross-sectional view showing another decorative functional film of the present application;

Figure 6 is a schematic plan view of the decorative functional film of the present application;

Figure 7 is a schematic cross-sectional view taken along line A-A of Figure 6;

Figure 8 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 9 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 10 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 11 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 12 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 13 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 14 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

Figure 15 is a schematic cross-sectional view showing another decorative functional film of Figure 7;

16 is a schematic plan view of a back cover module of an electronic device according to the present application;

Figure 17 is a cross-sectional view taken along line B-B of Figure 16;

18 is another schematic cross-sectional view of the back cover module of the electronic device of FIG. 17;

19 is another schematic cross-sectional view of the back cover module of the electronic device of FIG. 17;

20 is a schematic plan view of a back cover module of an electronic device according to the present application;

Figure 21 is a schematic cross-sectional view taken along line C-C of Figure 20;

22 is another schematic cross-sectional view of the back cover module of the electronic device of FIG. 21;

23 is another schematic cross-sectional view of the back cover module of the electronic device of FIG. 21.

detailed description

In order to facilitate the understanding of the present application, the present application will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. However, the application can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided so that this disclosure will be more thorough and comprehensive.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention applies, unless otherwise defined. The terminology used herein is for the purpose of describing particular embodiments, and is not intended to be limiting. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The present application discloses a decorative functional film that combines decorative and functional properties. The decorative functional film comprises a micro-nano layer, and the micro-nano structure in the micro-nano layer has an optical effect of reflection, refraction, transmission, etc., which produces an optical effect and enhances the decorative effect. The decorative functional film includes a functional layer including an antenna, display, touch, wireless charging, NFC (Near Field Communication), active light output, and the like.

The present application discloses an electronic device back cover module having the decorative functional film, and the electronic device back cover module has better decoration and functionality, and meets the individual needs of appearance and function. Still taking a smart phone as an example, a decorative functional film is applied to the back cover of the mobile phone. First of all, the decorative effect of the mobile phone is increased, and optical effects such as a light column, a stereoscopic effect, and the like are generated, and the display of colors, patterns, and the like is more clearly clear or more dazzling. Secondly, the functionality of the mobile phone is increased, for example, the back cover of the mobile phone: integrated with an antenna module and having an antenna function; integrated with a display module, having a power display, caller ID, information display, reminder function, etc.; integrated touch module with sliding Unlocking, fingerprint unlocking, volume adjustment, page turning function, switch machine, etc.; integrated wireless charging module with charging function; integrated with NFC module for payment, punching, etc. Integrated light-emitting module for active light extraction, added decoration or Information reminders, etc.

Preferably, a decorative functional film comprises a micro-nano layer, an appearance layer and a functional layer which are laminated. The micro-nano layer, the appearance layer or the functional layer does not limit the stacking order, and the micro-nano layer, the appearance layer or the functional layer may each be one or more layers, and when it is a plurality of layers, it may be a continuous superposition or a space superposition. The micro-nano layer includes a micro-nano structure with a plurality of protrusions and/or depressions, and the complex micro-nano structure produces a special optical effect on the light. The appearance layer includes at least one of a reflective layer, a colored layer, a colored layer, and a graphic layer, and displays a color, a graphic, and the like of the back cover. The micro-nano layer cooperates with the appearance layer to increase the display effect of the appearance layer: brighter, clearer, more stereoscopic, more dazzling, etc.; or can form optical images, 3D images, suspended images, etc.; or can form rainbow lines, interference patterns, Tiger skin grain, CD grain, etc.; or can form light and bright lines, including straight lines, curved lines, dot patterns, cone patterns, apertures, etc. The functional layer includes an antenna module composed of a conductive solid wire, a conductive mesh, a luminescent material, a display material, a display module, a touch module, a wireless charging module, an NFC module, and an light-emitting module. The functional layer can realize its function alone, and can also cooperate with the micro-nano layer and the appearance layer to realize its functions: graphic illumination, graphic change, light and shadow change and so on. The optical effect of the micro-nano layer, the color of the appearance layer, the graphic and the like may be set corresponding to the functional layer, and the function layer may be labeled, for example, a touch module corresponding to the functional layer, and the corresponding layer is provided with an arrow mark, and the arrow is left. Turn the page backwards, turn the arrow to the right and back, etc. Of course, in other embodiments, the decorative functional film may not have a micro-nano layer, and only includes an appearance layer and a functional layer, and the appearance layer includes at least one of a reflective layer, a colored layer, a colored layer, and a graphic layer. For example, the appearance layer has a graphic layer that cooperates with the functional layer. For example, the graphic layer is in the form of a battery, and the functional layer is a light-emitting or display module, which can be displayed in the graphic layer according to the amount of power.

Specifically, a decorative functional film includes a micro-nano layer, a reflective layer, a colored layer, and a functional layer which are sequentially stacked. The micro-nano layer includes a plurality of protrusions and/or recessed micro-nano structures, the reflective layer is coated on the micro-nano structure, the colored layer is coated on the reflective layer, and the functional layer is formed on the colored layer.

Preferably, the micro-nano layer is a UV adhesive layer, and the micro-nano structure is an embossed convex and/or concave structure. The micro/nano structure acts as an optical effect by reflecting, refracting, etc. the light. In general, the UV adhesive layer is a transparent colorless layer, but it can also be a colored UV adhesive with a certain transmittance. The colored UV adhesive can be combined with the reflective layer and the colored layer to develop a decorative functional film, or can be separately used as a decorative function. When the film is developed, when the color is developed separately, the appearance layer is the micro-nano layer. The micro/nano structure may be at least one of a linear cylindrical mirror, a non-linear cylindrical mirror, a microlens, a small short line, a Fresnel lens, a wire drawing, a CD pattern, and the like. The micro-nano structures can be arranged at intervals and/or without spaces. The cross-sectional shape of the micro-nano structure may be a triangle, a quadrangle, a polygon, an arc, an alien, or the like. The parameters of the micro-nano structure are all the same or different, and the parameters include type, shape, length, width, height, curvature, angle, depth, position, and the like.

Preferably, the reflective layer is a metal or non-metal layer having a reflective effect on the micro-nano structure layer. It can make the optical effect better, and also provide color for the decorative function film. The colored layer is formed on the reflective layer, typically a dark ink layer, which is used to match the reflective layer to display color and to block the display of the functional layer on the other side.

Preferably, the functional layer is a conductive layer formed by a process such as laser printing, laser, embossing or the like. The conductive layer may be a conductive solid wire or a conductive mesh directly disposed on the colored layer, or may be a conductive solid wire or a conductive mesh formed by coating a UV adhesive on the colored layer, and filling the groove with a conductive material. The conductive solid wire or conductive mesh can form an antenna, a wireless charging coil, a touch grid, an NFC grid, and the like.

Preferably, the functional layer further comprises an insulating protective layer covering the conductive layer, the conductive layer further comprising a contact portion not covered by the insulating protective layer. The contact portion is used for electrical connection with an external circuit or the like.

Preferably, the functional layer is formed on the other side of the micro-nano layer relative to the reflective layer. The functional layer includes a conductive layer or a display layer. The conductive layer is a conductive solid wire or a conductive mesh, and the conductive layer can form an antenna, a wireless charging coil, a touch grid, an NFC grid, and the like. The conductive solid line or grid line of the conductive layer has a width outside the visible range of the human eye, or the conductive material of the conductive layer is a transparent conductive material such as ITO, such that the conductive solid line or the conductive grid is colorless and transparent. Of course, the conductive layer can also be visible or visible by the human eye, or can be directly displayed outside, or the image is in the image layer. The display layer is at least one of an OLED display layer, an LED display layer, and a liquid crystal display layer. It may be a transparent layer such as an OLED display layer or a visible layer. When it is a visible layer, it occupies a part of the decorative functional film.

Preferably, the decorative functional film further comprises a second micro/nano layer disposed on the other side of the micro-nano layer relative to the reflective layer, and the micro-nano layer and the second micro-nano layer may each form an optical effect, or may interfere with each other to form an optical effect. The decorative functional film further includes a graphic layer disposed on the other side of the micro-nano layer relative to the reflective layer, and the graphic layer may be formed by filling the filling after imprinting. The image layer is adapted to the micro-nano layer to image and/or the graphic layer corresponds to the functional layer.

Preferably, the decorative functional film further comprises a carrier layer disposed on the other side of the micro-nano layer relative to the reflective layer, the carrier layer being a PET layer, a PC layer, a PI layer, or the like. The carrier layer is coated with UV glue and embossed with UV glue to form a micro-nano layer. The carrier layer may further comprise an adhesive layer on the other side of the micro-nano layer, and the adhesive layer is used for bonding the decorative functional film to a substrate such as glass, thereby forming an electronic device back cover module. The carrier layer may further include at least one of a second micro-nano layer, a graphic layer, and a colored layer with respect to the other side of the micro-nano layer.

Specifically, a decorative functional film includes a micro-nano layer, a reflective layer, and a functional layer which are sequentially stacked. The micro-nano layer includes a plurality of protrusions and/or recessed micro-nano structures, the reflective layer is disposed on the micro-nano structure, and the functional layer is formed on the reflective layer. At this time, the reflective layer has reflection, color development, and blocking functions.

Specifically, a decorative functional film includes an adhesive layer, a carrier layer, a micro-nano layer, a reflective layer, a colored layer, and a functional layer which are sequentially laminated.

Preferably, the functional layer comprises a conductive layer comprising a conductive mesh and leads extending from the conductive mesh. The interconnected grooves are embossed on the UV glue, and the conductive material is filled in the grooves to form a conductive mesh.

Specifically, a decorative functional film includes a second micro/nano layer or a patterned layer or a colored layer, a carrier layer, a micro-nano layer, a reflective layer, a colored layer, and a functional layer which are sequentially stacked.

Specifically, a decorative functional film includes a functional layer, a carrier layer, a micro-nano layer, a reflective layer, and a colored layer which are sequentially stacked.

Specifically, a decorative functional film includes a carrier layer, a functional layer, a micro-nano layer, a reflective layer, and a colored layer which are sequentially stacked.

Specifically, a decorative functional film includes a micro-nano layer, a carrier layer, a reflective layer, a colored layer, and a functional layer which are sequentially stacked.

In summary, several layers of the adhesive layer, the carrier layer, the micro-nano layer, the colored layer, the reflective layer, the colored layer, the conductive layer, the display layer, the insulating protective layer and the like may be combined according to the requirements to form the decorative functional film of the present application. It is both decorative and functional.

The present application also discloses an electronic device back cover module having the above decorative functional film. The back cover module of the electronic device adopts a substrate of glass, plastic, metal, etc., and the decorative functional film is bonded or directly formed on the substrate by an adhesive layer. The electronic device back cover module has a decorative functional film, not only structural components, but also has certain functionality in addition to good decoration, to meet individual needs. Taking a smart phone as an example, the design of the micro-nano layer and the appearance layer makes the design of the back cover of the mobile phone different from the conventional ones, and has a very good decorative effect. At the same time, the back cover of the mobile phone integrates the function module, and some functions of the mobile phone, such as power on/off, page turning, volume adjustment, power display, caller ID, wireless charging, NFC, active light output, etc., can be set in the back cover module. on. The functional layer is layered on the micro-nano layer and the appearance layer, which basically does not increase the thickness of the back cover of the mobile phone, but has certain functions, and cooperates with the micro-nano structure, color, graphics, etc., so that the customer experience is optimal. Make the phone not only a structural component, but also decorative and functional. Functional module of the functional layer, the main structure is a conductive layer. The conductive layer is disposed on one side of the colored layer relative to the micro-nano layer and the reflective layer, and does not affect the appearance at all. For example, the conductive mesh of the conductive layer forms an antenna, and when the antenna is disposed in the colored layer, it is completely invisible from the outside. You can discard the common three-piece case. The conductive layer can also be disposed on one side or both sides of the carrier layer. The conductive layer is visible or invisible to the human eye. When visible, it can be directly presented or designed into a certain pattern, such as the conductive solid line of the conductive layer is arranged along the mobile phone logo. When invisible, a transparent conductive material such as ITO may be used, or the conductive layer may be combined with the micro-nano layer and/or the image layer to set the recording setting. The lead of the conductive layer may extend to the inner side through a back cover edge, a partial blind hole or a camera hole or the like to facilitate electrical connection with a component such as a battery.

Specifically, an electronic device back cover module includes: a substrate, a micro-nano layer, a reflective layer, a colored layer, and a conductive layer. Preferably, the substrate, the micro-nano layer, the reflective layer, the colored layer, and the conductive layer are laminated in this order. Preferably, there is a bonding layer between the colored layer and the conductive layer. The conductive layer comprises a conductive solid wire or a conductive mesh, and the conductive solid wire or conductive mesh has contacts or leads.

Specifically, an electronic device back cover module includes: a substrate, an adhesive layer, a carrier layer, a micro-nano layer, a reflective layer, a colored layer, and a conductive layer. Preferably, the substrate, the adhesive layer, the carrier layer, the micro-nano layer, the reflective layer, the colored layer, and the conductive layer are sequentially stacked. Preferably, there is a bonding layer between the colored layer and the conductive layer. The conductive layer comprises a conductive solid wire or a conductive mesh, and the conductive solid wire or conductive mesh has contacts or leads.

Specifically, an electronic device back cover module is sequentially laminated with a substrate, an adhesive layer, a conductive layer, a carrier layer, a micro-nano layer, a reflective layer, and a colored layer. The conductive layer comprises a conductive solid wire or a conductive mesh, and the conductive solid wire or the conductive mesh has leads. The leads extend to the other side of the colored layer relative to the reflective layer by side edges or perforations of the substrate.

Hereinafter, the decorative functional film and the electronic device functional module of the present application will be exemplified with reference to the drawings.

Referring to Figures 1 through 5, a decorative functional film 100 is disclosed having various embodiments.

Referring to FIG. 1, a decorative functional film 100 includes a micro-nano layer 11, a reflective layer 12, a colored layer 13, and a functional layer 14 which are sequentially stacked. The micro-nano layer 11 includes a plurality of raised micro-nano structures 111. In the present embodiment, the micro/nano structures 111 are microlenses arranged in a plurality of rows. The reflective layer 12 is a metal layer plated on the micro/nano structure 111. The colored layer 13 is a primer ink layer, and the colored layer 13 and the reflective layer 12 provide color to the decorative functional film 100. The reflective layer 12 and the colored layer 13 are the appearance layers of the decorative functional film 100. The functional layer 14 is a conductive layer, and includes a plurality of conductive meshes and leads electrically connected to the conductive meshes, and the lead ends are exposed with gold fingers. The conductive layer can be an antenna, a touch, a wireless charging, and a conductive layer for NFC. The functional layer 14 may include an antenna module, a touch module, a wireless charging module, or an NFC module, etc., so that the decorative functional film 100 has both decorative and functional properties. In other embodiments, the micro-nano layer 11 is a colored UV glue.

Preferably, referring to FIG. 2, the micro-nano layer 11 (for the sake of clarity, the same layers in different embodiments of the same type of decorative functional film are given the same reference numerals, the same below) are imprinted with respect to the other side of the micro-nano structure 111. After being filled, the graphic structure 112 is formed. The graphic structure 112 can be a color bearer, an indication or a logo, and the like. The micro-nano structure 111 can make the teletext structure 112 brighter and clearer, and can also cause the teletext structure 112 to exhibit a stereoscopic effect or to image the teletext structure 112. The graphic structure 112 can also be used in conjunction with the functional layer 14. For example, the graphic structure 112 is "+" and "-", and the functional layer 14 has a touch function. Click "+" to increase the volume or turn the page backward, etc., click " -" can reduce the volume or turn the page forward.

Preferably, referring to FIG. 3, the decorative functional film 100 includes a micro-nano layer 11, a reflective layer 12, and a functional layer 14 which are sequentially stacked. The thickness of the reflective layer 12 is relatively thick, and the reflective layer 12 functions as both a reflective and primer ink.

Preferably, referring to FIG. 4, the decorative functional film 100 further includes a carrier layer 15. In one embodiment, the carrier layer 15 is a PET layer. The PET layer is a colored or colorless transparent layer. The carrier layer 15 serves as a substrate layer and a support layer, and the micro-nano layer 11, the reflective layer 12, the colored layer 13, and the functional layer 14 are sequentially formed on the carrier layer 15.

Preferably, referring to FIG. 5 , the functional layer 14 is disposed on the other side of the carrier layer 15 relative to the micro-nano layer 11 . Since there is no occlusion of the colored layer 13, the functional layer 14 can be provided as a conductive layer, and the conductive layer can be hidden under the graphic, form a special pattern or use a transparent conductive material such as ITO. The functional layer 14 can also be configured as a display module and a light exiting module, such as an OELD display, a liquid crystal display, and the like. The light output module such as OLED light output or LED light output. The functional layer 14 is electrically connected to a power source, a chip, or the like through a lead.

Referring to Figures 6 through 15, a decorative functional film 200 is disclosed having a variety of embodiments.

Referring to Figures 6 and 7, a decorative functional film 200 is in the form of a sheet. It includes a carrier layer 25, a micro-nano layer 21, a reflective layer 22, a colored layer 23, and a functional layer 24 which are sequentially stacked. The functional layer 24 is displayed on the entire diaphragm 200 as a touch function of the touch area. The functional layer 24 is a printed or laser conductive grid on the colored layer 23 and an insulating protective layer overlying the conductive mesh. The touch function can be on/off, volume, page turning, fingerprint recognition, and the like. At the same time, the touch area may be darker/lighter in color, with a spot or the like to distinguish it from other areas.

Preferably, referring to FIG. 8 , the functional layer 24 is disposed on the other side of the carrier layer 25 opposite to the micro-nano layer 21 . The conductive mesh of the functional layer 24 may adopt an invisible thin line or a transparent line to present a transparent state, or a visible solid line may be used to make the touch area more conspicuous.

Preferably, referring to FIG. 9, the functional layer 24 includes a bonding layer 241 and a conductive layer 242. The bonding layer 241 bonds the functional layer 24 to the colored layer 23. The conductive layer 242 is formed by embossing the UV adhesive and filling the conductive material. It can be bonded to the other substrate and then bonded by the adhesive layer 241.

Preferably, referring to FIG. 10, the functional layer 24 is formed by applying UV glue on the colored layer 23, embossing the groove, and filling the conductive material.

Preferably, referring to FIG. 11, the functional decorative film 200 further includes a graphic layer 26 between the micro-nano layer 21 and the carrier layer 25. The graphic layer 26 can make the touch area more visible for text, logo, indicator icon, color, and the like. The graphic layer 26 includes a graphic structure 261 formed by embossing the UV glue. The micro-nano structure 211 can make the graphic structure 261 more clear or conspicuous or exhibit a 3D effect or imaging or the like.

Preferably, referring to FIG. 12, the graphic layer 26 is formed on the other side of the carrier layer 25 with respect to the micro-nano layer 21.

Preferably, referring to FIG. 13, the functional decorative film 200 further includes a colored layer 27 disposed on the carrier layer 25. The colored layer 27 may be colored separately for the functional decorative film 200, or may be colored in cooperation with the reflective layer 22 and the colored layer 23. In other embodiments, the colored layer may also be located between the carrier layer and the micro-nano layer.

Preferably, referring to FIG. 14, the functional decorative film 200 further includes a second micro/nano layer 28. The second micro-nano layer 28 includes a plurality of raised second micro-nano structures 281. The second micro/nano structure 281 is a cylindrical mirror arranged at a plurality of intervals. The micro/nano structure 211 and the second micro/nano structure 281 have respective optical effects or may interfere with each other to form a new optical effect.

Preferably, referring to FIG. 15, the functional decorative film 200 further includes an adhesive layer 29. The release layer 29 can carry a release film for convenient transportation. The adhesive layer 29 is used to bond the functional decorative film 200 to a glass panel or the like.

Referring to Figures 16 through 19, an electronic device back cover module 300 is disclosed having various embodiments.

Referring to FIGS. 16 and 17 , the electronic device back cover module 300 includes a substrate 301 , an adhesive layer 39 , a carrier layer 35 , a micro-nano layer 31 , a reflective layer 32 , a colored layer 33 , and a functional layer 34 . The functional layer 34 is located at the upper end of the back cover module 300, and has a conductive mesh formed therein to form an antenna of the electronic device back cover module 300. The functional layer 34 includes an antenna disposed at a predetermined end of the colored layer 33 by a process such as printing or laser, and the antenna may be a conductive solid wire or a conductive mesh. The substrate 301 is a transparent glass. Taking the back cover of the mobile phone as an example, the substrate 301 is disposed on the outer layer, the colored layer 33 blocks the inside of the mobile phone, and the antenna is disposed on the other side of the colored layer 33 with respect to the micro-nano layer 31. Therefore, the antenna can be truly captured, and the design of the back cover of the mobile phone is made a breakthrough.

Referring to Fig. 18, the functional layer 34 is formed by varnishing the UV adhesive and filling the conductive material. In other embodiments, the functional layer may also be disposed on one or both sides of the carrier layer, and may be filled with a colored or colorless conductive material as needed.

Referring to FIG. 19, the functional layer 34 further includes a conductive layer 341 and an insulating protective layer 342 overlying the conductive layer 341. The insulating protective layer 342 does not cover the contact portion of the conductive layer 341, and the contact portion can be electrically connected to the internal structure of the mobile phone.

Referring to Figures 20 through 23, an electronic device back cover module 400 is disclosed having various embodiments.

Referring to FIGS. 20 and 21 , the electronic device back cover module 400 includes a substrate 401 , an adhesive layer 49 , a carrier layer 45 , a micro-nano layer 41 , a reflective layer 42 , a colored layer 43 , and a functional layer 44 . Still taking the mobile phone as an example, the function layer 44 implements functions such as wireless charging or NFC. For example, the functional layer 44 includes a coil of the wireless charging mobile phone end. When the mobile phone is placed on the wireless charging stand, it can be coupled with the coil on the charging stand to realize charging of the mobile phone.

Preferably, referring to FIG. 22, the functional layer 44 is disposed on the carrier layer 45. The function layer 44 implements functions such as wireless charging, NFC, display, and light output. For example, functional layer 44 includes an OLED module that includes a cathode, an anode, and an organic material between the cathode and the anode. The OLED module can be illuminated or displayed, such as caller ID, information prompt.

Preferably, referring to FIG. 23, the electronic device back cover module 400 further includes a graphic layer 46 disposed on the carrier layer. The graphic layer 46 and the functional layer 44 are disposed on both sides of the carrying layer 45, and of course the positions are interchangeable or may be located on one side thereof. The graphic layer 46 can highlight the functional area or indicate the functional area. It can also be highlighted by a predetermined logo and illuminated by a functional layer. The OLED module can be connected to the battery and the like through a boundary, a camera hole, a graphic layer, or the like.

Therefore, the back cover of the electronic device is set with color or graphic through the appearance layer, and the micro-nano layer is used to realize a special optical effect, and the integrated functional layer satisfies the individual needs. Making the back cover of electronic devices more than just structural components has more market value.

The specific embodiments of the present application will be described in detail with reference to the accompanying drawings. Numerous specific details are set forth in the above description in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways than those described above, and those skilled in the art can make similar improvements without departing from the spirit of the present application, and thus the present application is not limited by the specific embodiments disclosed above. Moreover, the technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of these technical features does not exist. Contradictions should be considered as the scope of this manual.

The above-mentioned embodiments are merely illustrative of several embodiments of the present application, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the claims. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the present application. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A decorative functional film, comprising:

a micro-nano layer comprising a plurality of protrusions and/or recessed micro-nano structures;

a reflective layer overlying the micro-nano layer;

a colored layer disposed on the reflective layer;

A functional layer comprising a conductive layer.
The decorative functional film according to claim 1, further comprising a carrier layer, wherein the micro-nano layer is disposed on the carrier layer, and the functional layer is disposed on the colored layer or the carrier layer.
The decorative functional film according to claim 1 or 2, wherein the conductive layer comprises a conductive solid wire or a conductive mesh.
The decorative functional film according to claim 3, wherein the conductive solid wire or the conductive mesh is colorless and transparent.
The decorative functional film according to claim 1 or 2, wherein the functional layer further comprises an insulating protective layer coated on the conductive layer, the conductive layer further comprising not covered by the insulating protective layer Contact.
The decorative functional film according to claim 1 or 2, wherein the functional layer comprises at least one of an antenna module, a display module, a touch module, a wireless charging module, an NFC module, and an light emitting module.
The decorative functional film according to claim 6, wherein the display module comprises at least one of an OLED display layer, an LED display layer, and a liquid crystal display layer.
The decorative functional film according to claim 2, further comprising a colored layer, or the carrying layer is a colored PET layer.
The decorative functional film according to claim 2, further comprising a second micro/nano layer on either side of the carrier layer, the micro-nano layer and the second micro-nano layer each exhibit an optical effect, Or the micro-nano layer and the second micro-nano layer interfere with each other to form an optical effect.
The decorative functional film according to claim 2, further comprising a graphic layer on either side of the carrier layer, the graphic layer being adapted to the micro-nano layer for imaging and/or The graphic layer corresponds to the functional layer.
The decorative functional film according to claim 1 or 2, wherein the micro/nano structure is a linear cylindrical mirror, a non-linear cylindrical mirror, a microlens, a small short line, a Fresnel lens, a brushed pattern, and a CD pattern. At least one of them.
An electronic device back cover module comprising the decorative functional film according to any one of claims 1 to 11.