CN213818443U - Electronic device - Google Patents

Abstract

The application provides an electronic device the electronic device includes: a housing and a rear cover assembly; the rear cover component comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate; the rear cover assembly and the shell are jointly enclosed to form an accommodating space, and the accommodating space is used for accommodating electronic devices of the electronic equipment; the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the device stacking structure can be observed on one side of the rear cover component of the electronic equipment. The electronic equipment provided by the embodiment of the application has the structure capable of changing the appearance effect of the rear cover of the electronic equipment, and the device stacking structure can be observed when the rear cover is in a transparent state; the color of the electrochromic module is displayed when the rear cover is in a non-transparent state, and the appearance effect of the electronic equipment is greatly enriched.

Description

Electronic device

Technical Field

The invention relates to the technical field of shell structures of electronic equipment, in particular to electronic equipment.

Background

At present, shells of consumer electronics products such as mobile phones, tablet computers and the like are generally made of plastic, metal, glass, ceramic and the like, the appearance is relatively monotonous in decoration, the appearance is determined during production and manufacturing, and the change along with the environment, a specific application scene or the mood of consumers cannot be realized during use. The shell only plays a role in protecting the mobile phone and realizes a simple decorative effect.

Disclosure of Invention

A first aspect of an embodiment of the present application provides an electronic device, where the electronic device includes:

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly and the shell are jointly enclosed to form an accommodating space, and the accommodating space is used for accommodating electronic devices of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the device stacking structure can be observed on one side of the rear cover component of the electronic equipment.

In a second aspect, an embodiment of the present application provides an electronic device, including:

a display screen;

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly, the shell and the display screen are arranged together in a surrounding mode to form an accommodating space, and the accommodating space is used for accommodating a circuit board and a battery of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the device stacking structure can be observed on one side of the rear cover component of the electronic equipment.

In addition, an embodiment of the present application further provides an electronic device, where the electronic device includes:

a display screen;

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly, the shell and the display screen are arranged together in an enclosing mode to form an accommodating space, and the accommodating space is used for accommodating a circuit board of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the circuit board in the electronic equipment can be observed on one side of the rear cover component of the electronic equipment.

The electronic equipment provided by the embodiment of the application has the structure capable of changing the appearance effect of the rear cover of the electronic equipment, and the device stacking structure can be observed when the rear cover is in a transparent state; the color of the electrochromic module is displayed when the rear cover is in a non-transparent state, and the appearance effect of the electronic equipment is greatly enriched.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of an overall structure of an embodiment of an electronic device according to the present application;

FIG. 2 is a schematic diagram of a back structure of the electronic device in the embodiment of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the structure at A-A in FIG. 2;

FIG. 4 is a schematic structural view of an embodiment of a rear cover assembly of the present application;

FIG. 5 is a schematic diagram of a partial structural stack of one embodiment of an electrochromic module;

FIG. 6 is a schematic diagram of a partial structure of an electrochromic module;

FIG. 7 is a schematic cross-sectional view of another embodiment of a rear cover assembly of the present application;

FIG. 8 is a schematic cross-sectional view of another embodiment of a rear cover assembly according to the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive step are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

The currently adopted decoration scheme for battery covers of electronic devices such as mobile phones generally is to attach a layer of textured film with OCA (optical Clear Adhesive) on the inner surface of transparent or etched translucent glass to realize different colors/color gradual changes and special light and shadow effects. However, in the battery cover structure of this scheme, once the product leaves the factory, the appearance is fixed, and the effect of appearance change cannot be realized.

Referring to fig. 1 to fig. 3 together, fig. 1 is a schematic front view of an overall structure of an embodiment of an electronic device of the present application, and fig. 2 is a schematic back structure of the electronic device in the embodiment of fig. 1; FIG. 3 is a schematic cross-sectional view of the structure at A-A in FIG. 2; it should be noted that the terminal device in the present application may include a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like. The present embodiment is described by taking a mobile phone as an example. The electronic device includes a rear cover assembly 10, a case 20, and a display screen 30. The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

Specifically, the rear cover assembly 10, the housing 20 and the display screen 30 together enclose a receiving space 1000, and the receiving space 1000 is used for receiving electronic devices of the electronic device, where the electronic devices include the circuit board 40 and the battery 50. The housing 20 may be a middle frame or a side frame of the electronic device.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a rear cover assembly according to an embodiment of the present application, in which the rear cover assembly 10 includes a cover plate 200 made of a transparent or translucent material and an electrochromic module 100 disposed on a side surface of the cover plate 200. The cover plate 200 may be made of glass, resin, or the like. The outer shape may be 2D or 3D with a curved surface, and the cover plate 200 having a planar structure is exemplified in the present embodiment.

Optionally, the electrochromic module 100 includes a first substrate 110, a first conductive layer 120, a color-changing material layer 130, a second conductive layer 140, a second substrate 150, and a frame 160. Specifically, the first substrate 110, the first conductive layer 120, the color-changing material layer 130, the second conductive layer 140, and the second substrate 150 are sequentially stacked; in this embodiment, the rubber frame 160 surrounds the color-changing material layer 130 and is used for sealing the color-changing material layer 130 from the side, and has the characteristic of low water vapor transmittance to block water vapor from entering the color-changing material layer 130. The frame 160 can be made by mixing ultraviolet curing type and thermosetting type glue according to a certain composition to obtain an ultraviolet heating curing mixed frame glue. The viscosity of the glue can be 25-35 ten thousand mPas. The package position of the rubber frame 160 may also be other structures, which are not listed and described in detail herein. It should be noted that the terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Optionally, in this embodiment, the first substrate 110 and the second substrate 150 are made of a flexible transparent resin material, so that the entire structure of the electrochromic module 100 is in a flexible and bendable structural form. The first substrate 110 and the second substrate 150 function to support and protect internal structures. In some embodiments, the first substrate 110 and the second substrate 150 may be made of PET (Polyethylene terephthalate, PET or PEIT, polyester resin, or a condensation polymer of terephthalic acid and ethylene glycol), PMMA (poly (methyl methacrylate), PMMA (PMMA), or acryl, Acrylic, or organic glass), PC (Polycarbonate, PC) is a polymer containing carbonate in a molecular chain, PI (Polyimide), and the like. Further material types for the first substrate 110 and the second substrate 150 are not listed and detailed herein within the understanding of those skilled in the art. The forming method of the first conductive layer 120 and the second conductive layer 140 may be Physical Vapor Deposition (PVD), specifically including vacuum evaporation, sputtering, ion plating (hollow cathode ion plating, hot cathode ion plating, arc ion plating, reactive ion plating, radio frequency ion plating, direct current discharge ion plating), and the like.

The thicknesses of the first conductive layer 120 and the second conductive layer 140 may be between 100nm and 300nm, and specifically, may be 100nm, 120nm, 150nm, 200nm, 280nm, 300nm, and the like. The first conductive layer 120 and the second conductive layer 140 are made of transparent conductive materials. The transparent conductive material can be Indium Tin Oxide (ITO), zinc aluminum oxide (AZO), tin oxide doped with Fluorine (FTO), graphene film or the like.

Optionally, referring to fig. 5, fig. 5 is a partial structure lamination schematic diagram of an embodiment of an electrochromic module, wherein the color-changing material layer 130 further includes a sub-layer structure, as shown in fig. 2, the color-changing material layer 130 includes an electrochromic layer (i.e., EC layer) 131, a dielectric layer 132, and an ion storage layer (i.e., IC layer) 133 sandwiched between the first conductive layer 120 and the second conductive layer 140 and sequentially stacked. Alternatively, the material of the electrochromic layer 131 may be selected from organic polymers (including polyaniline, polythiophene, etc.), inorganic materials (prussian blue, transition metal oxides such as tungsten trioxide), and organic small molecules (viologen), etc. In the embodiment of the present application, the electrochromic layer 131 is exemplified as an organic polymer, and the electrochromic layer 131 may be a solid or gel material. Alternatively, the ion storage layer 133 and the dielectric layer 132 may be formed by PVD, and the electrochromic layer 131 (wherein the electrochromic layer 131 is the organic polymer or the inorganic material as described above) may be formed by doctor blade coating or drip irrigation, etc., which is within the understanding of those skilled in the art and will not be described in detail herein.

The color-changing material layer 13 may also be an organic small molecule or Polymer Dispersed Liquid Crystal (PDLC, Polymer Dispersed Liquid Crystal, in which Liquid Crystal is Dispersed in an organic solid Polymer matrix as micron-sized droplets, and when the Liquid Crystal is in a free orientation, its refractive index is not matched with that of the matrix, and when light passes through the matrix, it is strongly scattered by the droplets to be in an opaque milky white state or a translucent state.

When the PDLC is not electrified, the liquid crystal molecules scatter light and are in a fog state, and when the PDLC is electrified, the PDLC is in a transparent state. Thus, another design can be achieved by replacing FECD with PDLC, where the cover plate 200 needs to be transparent, and if it is etched glass or translucent, the contrast before and after PDLC is energized will be greatly impaired. The characteristic parameters of the PDLC are as follows.

When the color-changing material layer 130 is an organic small molecule or polymer dispersed liquid crystal, a specific formation method may be that the color-changing material layer is formed between the first conductive layer 120 and the second conductive layer 140 by a vacuum filling process, which is not described in detail herein.

Referring to fig. 4 and fig. 6 together, fig. 6 is a schematic partial structure front view of an electrochromic module, the electrochromic module in this embodiment further includes a metal trace 180, and the metal trace 180 specifically includes a first metal trace 181 and a second metal trace 182; the first metal trace 181 is connected to the first conductive layer 120, and the second metal trace 182 is connected to the second conductive layer 140. The metal trace 180 includes but is not limited to a multi-layer trace structure such as a silver paste line, a copper plated layer, an aluminum plated layer, or a molybdenum aluminum molybdenum layer.

Optionally, the first metal trace 181 is disposed along an edge position close to the surface of the first conductive layer 120, and the second metal trace 182 is disposed along an edge position close to the surface of the second conductive layer 150. The specific structure of the trace has various design forms, such as an L-shaped trace (the situation shown in the figure in this embodiment), a loop trace, and the like, which is not limited herein.

In order to make the electrochromic module have a faster color change speed, the sheet resistance of the first conductive layer 120 and the second conductive layer 140 is set to 40-150 ohms, such as 40 ohms, 50 ohms, 80 ohms, 100 ohms, 120 ohms, 550 ohms, and so on; the sheet resistance of the first metal trace 181 and the second metal trace 182 may be 0.05-2 ohms, and may specifically be 0.05 ohms, 0.06 ohms, 0.1 ohms, 1.2 ohms, 1.5 ohms, 2 ohms, and the like, which is not limited herein. The coloring speed of the electrochromic module can be between 10-20s, the fading speed between 8-12s, or faster.

Optionally, with reference to fig. 6, the electrochromic module 100 in the embodiment further includes a flexible circuit board 183, and the flexible circuit board 183 is connected to the first metal trace 181 and the second metal trace 182, respectively. The first metal trace 181 and the second metal trace 182 are connected to an external driving circuit (specifically, a control circuit board of an electronic device or a self-contained chip structure, not shown, but not limited thereto) through a flexible circuit board 183, and the external driving circuit provides a power source for the electrochromic module and drives the electrochromic material to change color.

Referring to fig. 2, when viewed from the cover plate 200 side, the rear cover assembly 10 can be roughly divided into a camera reserved area X, a color-changing area Y and a black-edge area Z (a non-display area of the electrochromic module 100 and a bonding area of the rear cover assembly 10 and the housing 20); the state in fig. 2 is a transparent state of the electrochromic module 100, and the electrochromic module 100 can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the stacked structure of the devices (the structure of the dotted line in the figure, including the circuit board 40, the battery 50, etc.) inside the electronic device can be observed from the side of the rear cover assembly of the electronic device.

According to the technical scheme, a complex processing technology is not needed, and the appearance and color of the transparent cover plate can be controlled only by attaching the electrochromic module which is controlled by power on to the inner surface of the transparent cover plate. The flexible electrochromic module has a bistable characteristic, does not need to be continuously electrified in any state (transparent and colored states), and only needs to supply small current when the appearance color needs to be changed, so that the power consumption is very low. According to the technical scheme, special texture decoration is not needed to be performed on the product shell, and the product can be decorated only by the flexible electrochromic module. When the electrochromic module is colored, the color of the electrochromic module is the decoration color of the appearance of the product; when the electrochromic module is in a transparent state, the stacking and components inside the product can be seen, so that the product has more scientific and technological sense; the appearance effect of the electronic equipment is greatly enriched.

Referring to FIG. 7, FIG. 7 is a schematic cross-sectional view of another embodiment of a rear cover assembly of the present application; different from the aforementioned embodiment of fig. 4, the rear cover assembly 100 in this embodiment further includes a water and oxygen barrier unit 170, and the water and oxygen barrier unit 170 is disposed on a surface of the electrochromic module facing away from the cover plate 200. Optionally, the water oxygen barrier unit 170 includes a substrate 171 and a water oxygen barrier layer 172 plated on at least one side surface of the substrate 171. The substrate 171 may be made of a flexible transparent resin material, including polyethylene terephthalate PET, polycarbonate PC, polyimide PI, and the like. The water-oxygen barrier layer 172 may be a dense metal oxide layer or an inorganic non-metal layer or a composite layer formed by stacking materials and inorganic materials. Such as aluminum oxide, silicon oxide, or a laminated composite structure of multiple materials, etc.

Optionally, the water and oxygen barrier unit 170 in this embodiment is a flexible substrate coated with a water and oxygen barrier layer 172, and has a water vapor transmission rate WVTR <1x10-2g/m 2/day. The water vapor permeation direction of the water oxygen barrier unit 170 in the embodiment of the present application is a physical characteristic that the water oxygen barrier unit 170 permeates from one side surface of the water oxygen barrier unit 170 to the opposite side surface in the thickness direction. Alternatively, the water oxygen barrier unit 170 and the electrochromic module 100 may be bonded by an optical adhesive (not shown). In addition, in some other embodiments, the water oxygen barrier unit 170 may be in a structure form that does not include a substrate, i.e., a structure form that is only one dense coating film.

The process of preparing the rear cover assembly in this embodiment generally includes: 1) coating electrochromic materials (an electrochromic layer (namely an EC layer)) and counter electrode materials (an ion storage layer (namely an IC layer)) on an upper conductive flexible film and a lower conductive flexible film (a substrate with a conductive layer) respectively; 2) dropping electrolyte solution (in this embodiment, organic polymer is taken as an example for illustration) between two conductive flexible films, and combining the upper and lower sheets together through two rollers rotating inwards (roll-to-roll forming scheme, detailed technical features of this part are not detailed here); 3) respectively cutting off flexible base materials with certain width on the upper and lower sheets, and wiping out electrolyte materials; 4) respectively dotting conductive paste (such as conductive silver paste) on the upper and lower sheets, and volatilizing a diluent in the silver paste by high-temperature solid baking to manufacture metal wiring; 5) the metal wiring (or the periphery of the metal wiring) is protected by sealant, and the electrochromic material is packaged together with the upper and lower flexible films; 6) binding a flexible circuit board on the upper sheet or the lower sheet to form an electrochromic module; 7) the glass is attached to the 2D/3D transparent cover plate through OCA/OCR; 8) and (3) attaching a layer of transparent water and oxygen barrier unit on the surface of the flexible device, and completing the preparation of the rear cover assembly through the steps. It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

The rear cover assembly is provided with the water and oxygen blocking unit, so that the rear cover assembly can form annular enclosure through the rubber frame, the water and oxygen blocking unit and the cover plate, the core layer electrochromic material of the electrochromic unit is protected, and water and oxygen are prevented from entering.

Referring to FIG. 8, FIG. 8 is a schematic cross-sectional view of a rear cover assembly according to another embodiment of the present application; unlike the previous embodiments, the rear cover assembly of the present embodiment further includes an appearance membrane 190. The appearance membrane 190 is disposed on a side of the electrochromic module 100 facing away from the cover plate 200, and optionally, the water-oxygen barrier layer 172 and the appearance membrane 190 are disposed on two opposite sides of the substrate 171 respectively. The appearance film 190 has a pattern of a stacked structure of electronic devices, and when the electrochromic module 100 is in a transparent state, the pattern of the appearance film 190 can be observed on one side of the rear cover assembly of the electronic device, so that the appearance effect that a user can see the 'false internal device stacking' can be formed. When the electrochromic module 100 is in a non-transparent state (i.e., a colored state), the appearance film 190 is shielded, and the color of the electrochromic module 100 is displayed on the side of the rear cover assembly of the electronic device.

Alternatively, the appearance film 190 may be a single layer of film with a pattern of a stacked structure of electronic devices, or may be a structure formed on the substrate 171 by means of color coating or the like, and is not particularly limited herein. In order to prevent the entire back cover assembly from being too thick, the total thickness of the electrochromic module (the first substrate 110, the first conductive layer 120, the color-changing material layer 130, the second conductive layer 140, the second substrate 150, the water/oxygen barrier unit 170, and the appearance film 190 are stacked together) in this embodiment is controlled within 200-300 um.

The electronic equipment that this application embodiment provided, its rear cover subassembly is through designing outward appearance diaphragm structure to combine the state switching of electrochromic module, can make electronic equipment have the colored state of electrochromic module and the outward appearance diaphragm pattern at least two kinds of variable outward appearance effects.

The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. An electronic device, characterized in that the electronic device comprises:

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly and the shell are jointly enclosed to form an accommodating space, and the accommodating space is used for accommodating electronic devices of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the device stacking structure can be observed on one side of the rear cover component of the electronic equipment.

2. The electronic device of claim 1, wherein the rear cover assembly further comprises an appearance membrane disposed on a side of the electrochromic module facing away from the cover plate, the appearance membrane having a pattern of a stack of electronic devices, and the pattern of the appearance membrane is observable on the side of the rear cover assembly of the electronic device when the electrochromic module is in a transparent state.

3. The electronic device of claim 1, wherein the electrochromic module comprises a first substrate, a first conductive layer, a color-changing material layer, a second conductive layer, and a second substrate, which are sequentially stacked.

4. The electronic device of claim 3, wherein the color-changing material layer is made of polymer dispersed liquid crystal.

5. The electronic device according to claim 3, wherein the color-changing material layer is any one of an organic polymer, an organic small molecule, and an inorganic substance.

6. The electronic device according to any one of claims 3-5, wherein the rear cover assembly further comprises a water-oxygen barrier unit, and the water-oxygen barrier unit covers a side surface of the electrochromic module facing away from the cover plate.

7. The electronic device according to claim 6, wherein the water oxygen barrier unit comprises a substrate and a water oxygen barrier layer provided on at least one side surface of the substrate; the water and oxygen barrier layer is a compact metal oxide layer or an inorganic non-metal layer or a composite layer formed by overlapping materials and inorganic materials.

8. The electronic device of any of claims 3-5, wherein the electrochromic module further comprises a first metal trace and a second metal trace; the first metal wire is connected with the first conductive layer, and the second metal wire is connected with the second conductive layer; the first metal routing wire is arranged along the edge position close to the surface of the first conductive layer, and the second metal routing wire is arranged along the edge position close to the surface of the second conductive layer.

9. An electronic device, characterized in that the electronic device comprises:

a display screen;

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly, the shell and the display screen are arranged together in a surrounding mode to form an accommodating space, and the accommodating space is used for accommodating a circuit board and a battery of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the device stacking structure can be observed on one side of the rear cover component of the electronic equipment.

10. An electronic device, characterized in that the electronic device comprises:

a display screen;

a housing;

a rear cover assembly; the rear cover assembly comprises a transparent or semitransparent cover plate and an electrochromic module arranged on the surface of one side of the cover plate;

the rear cover assembly, the shell and the display screen are arranged together in an enclosing mode to form an accommodating space, and the accommodating space is used for accommodating a circuit board of the electronic equipment;

the electrochromic module can be switched between a non-transparent state and a transparent state; when the electrochromic module is in a transparent state, the circuit board in the electronic equipment can be observed on one side of the rear cover component of the electronic equipment.

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