CN211403051U

CN211403051U - Electrochromic device

Info

Publication number: CN211403051U
Application number: CN202020187307.8U
Authority: CN
Inventors: 刘倩男; 王宏
Original assignee: Shenzhen Guangyi Tech Co Ltd
Current assignee: Shenzhen Guangyi Tech Co Ltd
Priority date: 2019-11-29
Filing date: 2020-02-20
Publication date: 2020-09-01
Anticipated expiration: 2030-02-20
Also published as: CN110750022A; CN111103737A

Abstract

The utility model provides an electrochromic device, which comprises a first transparent conducting layer, a color-changing layer and a second transparent conducting layer; the first transparent conducting layer comprises a first conducting part and a second conducting part, the second transparent conducting layer comprises a third conducting part and a fourth conducting part, the color changing layer is positioned between the first conducting part and the third conducting part, the color changing layer and the third conducting part form a film main body part together, the second conducting part is bent to form a first bent part, and the fourth conducting part is bent to form a second bent part; wherein the first and second bent portions are provided with electrode leads, respectively. The utility model provides an electrochromic device not only can regard as display screen protection film to use, can also be applied to electronic terminal's backshell or protective housing to can be applied to the electronic terminal who has the camera, realize the integration effect of discolouing.

Description

Electrochromic device

Technical Field

The utility model belongs to the technical field of electrochromic, a electrochromic device is related to.

Background

With the continuous development of science and technology, the types of electronic terminal devices such as mobile phones are more and more, and consumers pay more attention to the diversification and individuation of the appearance in addition to the performance of the electronic terminal devices when purchasing the electronic terminal devices. At present, some manufacturers set various colors on the housing when the electronic terminal device leaves the factory, so as to attract consumers. However, the color of the shell is not changed once set, and the color only provides a fresh feeling for consumers for a short time, and cannot attract the consumers for a long time. Therefore, more consumers can choose to set a personalized shell outside the mobile phone, but some consumers can replace the shell after using the shell for a period of time, the original shell is likely to be discarded, the waste of materials is obviously caused, the environmental protection is not facilitated, and the purchase cost is increased for the consumers.

The electrochromic device can generate stable and reversible color and/or transmittance change under an applied electric field, and has huge application markets in smart homes and consumer electronics. At present, the transparency of a rear shell of a smart phone or an independent shell wrapping the rear side of the smart phone on the market cannot be changed, patterns or colors are in a fixed state, and the requirements can be met by utilizing an electrochromic device.

CN109634018A discloses a color-changing cover plate, including glass substrate, optics glue film and the electrochromic device that stacks gradually the setting, the electrochromic device is provided with first transparent conducting layer including parallel dislocation set's first film layer and second film layer at a side surface of first film layer orientation second film layer, is provided with the transparent conducting layer of second on a side surface of second film layer orientation first film layer, is provided with electrochromic material layer and electrolyte layer between first transparent conducting layer and the transparent conducting layer of second. Wherein the electrolyte layer is a gel state electrolyte layer, an all solid state electrolyte layer or a liquid state electrolyte layer. The staggered positions of the edges of the first transparent conducting layer and the second transparent conducting layer are respectively provided with an electrode lead, the electrode leads are electrically connected with a flexible circuit board through conducting resin, and the flexible circuit board is electrically connected with a mobile terminal mainboard. The electrochromic film that this patent provided has the changeable colour nature, but its edge need set up to walk the line and connect outer circuit and encapsulate, leads to the edge of electrochromic film to have the round frame can not take place to change colour, and when the electrochromic film changed colour like this, the unable integration effect that realizes of discolouing of cell-phone dorsal scale. Meanwhile, some current electronic terminal devices, such as mobile phones, tablets and the like, have some special functional areas, such as fingerprint areas, cameras, flash lamps and the like, and some functional areas are still in a convex shape, such as a convex camera, so that the current electrochromic film cannot meet the application requirements.

Therefore, it is necessary to develop an electrochromic device that can be matched with the functional area of the existing electronic device, and can realize an integrated color change effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrochromic device. The utility model provides an electrochromic device not only can regard as the display screen to use, can also be applied to electronic terminal's backshell or protective housing to can be applied to the electronic terminal who has the camera, realize the integration effect of discolouing. The utility model discloses the preferred flexible all solid state electrochromic device, each layer structure that wherein includes is flexible solid state structure, and flexible solid state electrolyte layer is also preferred to the electrolyte layer; the flexible all-solid-state electrochromic device can be applied to a planar structure and can also be applied to a bendable and foldable structure.

In order to achieve the purpose of the utility model, the utility model adopts the following technical proposal:

in a first aspect, the present invention provides an electrochromic device, including a first transparent conductive layer, a color-changing layer, and a second transparent conductive layer.

The first transparent conducting layer comprises a first conducting part and a second conducting part, the second transparent conducting layer comprises a third conducting part and a fourth conducting part, the color changing layer is located between the first conducting part and the third conducting part, the color changing layer and the third conducting part form a film main body part together, the second conducting part is bent to form a first bending part, and the fourth conducting part is bent to form a second bending part.

Wherein the first and second bent portions are provided with electrode leads, respectively.

The utility model designs the partial conducting layer needing to be provided with the wiring connecting position into the film edge bending part (the first bending part and the second bending part), and in the practical application process, the film edge bending part can correspond to the frame of the electronic terminal equipment, for example, any one or at least two of the left side frame, the right side frame, the upper side frame or the lower side frame, for example, the first bending part and the second bending part can jointly form the lower side frame; the first bent portion may form a left side frame, and the second bent portion may form a right side frame.

The utility model provides an electrochromic device is when using, and the film main part can regard as the main part to laminate in electronic terminal's backplate, perhaps can regard as electronic terminal's display screen, and first flexion and second flexion laminate in electronic terminal's frame, can realize electrochromic's integration effect like this.

Preferably, the electrochromic device further comprises a first protective layer located on a side of the first transparent conductive layer remote from the color changing layer.

Preferably, the first protection layer is made of a transparent material.

Preferably, the first protection layer includes a first protection portion and a second protection portion, the first protection portion covers the first conductive portion, the second protection portion covers the second conductive portion, and the second protection portion is made of a non-transparent material.

Preferably, the electrochromic device further comprises a second transparent protective layer located on a side of the second transparent conductive layer remote from the color-changing layer.

In order to protect the conducting layers on the two sides of the electrochromic device, the transparent protective layers are arranged, so that on one hand, the conducting layers can be protected from being damaged, and on the other hand, the application of the electrochromic device is not influenced by the transparent materials.

The protective layer can set up and keep away from discoloration layer one side at first transparent conducting layer, also can set up and keep away from discoloration layer one side at second transparent conducting layer, also can set up the protective layer respectively in both sides simultaneously.

Preferably, the color-changing layer is arranged on the first protective layer, and the cover plate is arranged on the side, away from the color-changing layer, of the first protective layer.

When electrochromic device used as cell-phone backshell or cell-phone protective housing, can set up the apron and further protect the utility model provides an electrochromic device.

Preferably, the cover plate includes a third curved portion covering the first curved portion and a fourth curved portion covering the second curved portion.

Preferably, the cover plate further includes a main body portion covering the first conductive portion.

Preferably, the main body is made of a transparent material, including but not limited to any one of polymethyl methacrylate, polycarbonate, polyurethane, polyisocyanate, polyethylene terephthalate, or glass, or a combination of at least two of them.

Preferably, the third bending portion and the fourth bending portion are both made of a non-transparent material, and each is independently selected from any one or a combination of at least two of ABS plastic, polypropylene or silica gel, including but not limited to the above materials.

In order to realize the electrochromic effect and not affect the appearance, the main body part of the cover plate is designed to be made of transparent materials, so that the electrochromic effect is not affected; the bending part is designed to be non-transparent material, and internally arranged wiring or external circuits and the like are hidden.

Preferably, the color-changing layer comprises an electrochromic material layer, an electrolyte layer and an ion storage layer, wherein the electrochromic material layer is positioned between the first transparent conducting layer and the electrolyte layer.

Preferably, the first transparent conductive layer includes a first transparent substrate and a first conductive layer, the second transparent conductive layer includes a second transparent substrate and a second conductive layer, the first conductive layer is located between the first transparent substrate and the color changing layer, and the second conductive layer is located between the second transparent substrate and the color changing layer.

Since the conductive layer is directly formed on the substrate during the actual manufacturing process, and the application is also directly carried out with the substrate, the substrate and the conductive layer are collectively named as a transparent conductive layer in the present invention.

Preferably, the membrane body portion is provided with a first blind hole and/or a first through hole.

The through holes, also called vias, are all open from the top layer to the bottom layer, blind holes are seen only at one side, i.e. blind holes are provided from one side surface, but not all layers are open.

In order to match with the electronic terminal equipment with a camera and other functional areas needing to capture light images or needing to open holes (such as a fingerprint sensing area), the utility model discloses set up through-holes or blind holes on the electrochromic device, if the camera is a flat camera, the through-holes can be set up, the incident light is not blocked, the blind holes can also be set up, because all layers except the color-changing layer are transparent materials, therefore, the incident light can not be influenced; and when the camera is a protruding camera or other protruding functional areas, the height of the blind hole of the camera needs to be matched with the height of the protruding part of the electronic terminal equipment. On the one hand, the projecting part can be accommodated, and on the other hand, the use of the projecting part (such as a projecting camera) is not influenced. The corresponding area of the convex part can also be set as an electrochromic device, and when the incident light is needed, the area is transparent.

The present invention can be implemented by the following embodiments:

preferably, as shown in fig. 1, the film main body portion is provided with a through hole, so that incident light rays of a protruding portion (such as a camera) of the electronic terminal device can be kept unobstructed.

Preferably, as shown in fig. 2, the electrochromic device includes a first transparent protection layer located on a side of the first transparent conductive layer, which is far away from the color changing layer, and through holes are formed in the first transparent conductive layer, the color changing layer, and the second transparent conductive layer to form the first blind hole.

The three-layer electrochromic device is provided with the through hole, the first transparent protective layer is not provided with the hole, the blind hole is formed, the part (such as a camera or a convex camera) needing to receive incident light cannot be shielded and covered by the electrochromic layer, the incident light can be shielded, and the use of the camera cannot be influenced when the convex part is the camera.

Preferably, as shown in fig. 3, the electrochromic device includes a first transparent protection layer located on a side of the first transparent conductive layer, which is far away from the color changing layer, second through holes are formed in the first transparent conductive layer, the color changing layer and the second transparent conductive layer, a second blind hole is formed in the first transparent protection layer, and the first blind hole is formed in the second through hole and the second blind hole.

When the total thickness of the first transparent conductive layer, the color-changing layer and the second transparent conductive layer is smaller than the height of the protruding part of the electronic terminal device, a second blind hole needs to be formed in the first transparent protective layer, and the first blind hole capable of accommodating the protruding part of the electronic terminal device is formed corresponding to a second through hole formed by the first transparent conductive layer, the color-changing layer and the second transparent conductive layer; that is, the total height of the second through hole and the second blind hole needs to be equal to or greater than the height of the protruding portion of the electronic terminal device.

In order to realize that the electrochromic effect of the electrochromic device of electronic terminal equipment bulge or other functional areas keeps unanimous with the electrochromic effect of other parts, the utility model discloses can also set up electrochromic device (following second electrochromic device or the third electrochromic device of mentioning) equally with the region that electronic terminal equipment bulge or other functional areas correspond, if electronic terminal equipment's functional area is the camera, only need when needs are taken a picture, this regional become transparent can, and when need not take a picture, this regional color change effect with other parts keeps unanimous.

The following embodiments are specific:

preferably, as shown in fig. 4, the electrochromic device includes a first transparent protection layer located on one side of the first transparent conductive layer away from the color changing layer, third through holes are formed in the first transparent conductive layer, the color changing layer and the second transparent conductive layer to form the first blind hole, a second electrochromic device is arranged at the bottom of the first blind hole, and the thickness of the second electrochromic device is less than or equal to the total thickness of the first transparent conductive layer, the color changing layer and the second transparent conductive layer.

Wherein the second electrochromic device comprises a third transparent conductive layer, a second color-changing layer, and a fourth transparent conductive layer.

The second electrochromic device may be made of the same material as the electrochromic device mentioned in the first aspect of the present invention, and the difference is that the thickness of a certain layer or several layers is changed. The utility model discloses a second electrochromic device includes third transparent conducting layer, second discoloration layer and fourth transparent conducting layer, in concrete implementation, can change the thickness of conducting layer or discoloration layer, or certain layer or certain several layers' thickness in the electrochromic material layer, electrolyte layer and the ion storage layer that include in the discoloration layer, in a word, the height that highly can match the electronic terminal device bulge of the first blind hole of ensureing to form at last just can satisfy application requirements.

When the thickness of second electrochromic device equals the gross thickness of first transparent conducting layer, discoloration layer and second transparent conducting layer, can be applied to the electronic terminal equipment similar to having plane camera, when needs were taken a picture, second electrochromic device becomes transparent, makes incident light can get into can.

Preferably, as shown in fig. 5, the electrochromic device includes a first transparent protection layer located on one side of the first transparent conductive layer away from the color changing layer and a second transparent protection layer located on one side of the second transparent conductive layer away from the color changing layer, and the second transparent protection layer is provided with a fourth blind hole or a fourth through hole to form the first blind hole.

When the thickness of the second protective layer is thicker, the blind holes or the through holes can be arranged on the second transparent protective layer, so that the height requirement of the protruding part of the electronic terminal equipment can be met.

Preferably, as shown in fig. 6, the electrochromic device includes a first transparent protection layer located on one side of the color changing layer, which is located on the first transparent conductive layer, and a second transparent protection layer located on one side of the color changing layer, which is located on the second transparent conductive layer, wherein a fifth through hole is formed in the first transparent conductive layer, the color changing layer, the second transparent conductive layer, and the second transparent protection layer, so as to form the first blind hole, a third electrochromic device is arranged at the bottom of the first blind hole, and the thickness of the third electrochromic device is less than or equal to the total thickness of the first transparent conductive layer, the color changing layer, the second transparent conductive layer, and the second transparent protection layer.

The third electrochromic device comprises a fifth transparent conducting layer, a third color-changing layer, a sixth transparent conducting layer and a third transparent protective layer, and the third transparent protective layer is positioned on one side far away from the first transparent protective layer.

No matter whether set up the protective layer, only need to guarantee that the blind hole size that sets up on electrochromic device can satisfy the operation requirement, highly can satisfy the high requirement of electronic terminal equipment bulge can, the material of electrochromic device that sets up at the blind hole part etc. can keep unanimous with other parts, the thickness of one or several layers among them of reduction of adaptability to satisfy the requirement.

Preferably, the color-changing layer is arranged on the second transparent conducting layer, and the color-changing layer is arranged on the second transparent conducting layer.

When the color-changing layer becomes transparent, then the utility model provides an electrochromic device has the function of mirror, realizes killing many birds with one stone.

Preferably, the color changing layer of the electrochromic device has a design pattern.

Preferably, the electrochromic device further comprises a photosensitive element and/or a thermosensitive element electrically connected.

The utility model discloses a colour-changing layer sets up the pattern and can realize the utility model discloses a patterning of electrochromic device changes the function, to the mode that sets up the pattern the utility model discloses do not do too much and inject, exemplary, can utilize lithography etc..

In the present invention, the thickness range of each layer is not limited too much, and the thickness range can be adopted as long as the application can be satisfied, for example, the thickness of the conductive layer can be 5 to 1000nm, such as 10nm, 50nm, 100nm, 200nm, 400nm, 500nm, 600nm, 800nm, 900nm, etc., preferably 20 to 50 nm. The thickness of the electrochromic material layer may be 5-1000nm, such as 10nm, 50nm, 100nm, 200nm, 400nm, 500nm, 600nm, 800nm, 900nm, etc., preferably 150-300 nm. The ion storage layer may have a thickness of 5 to 1000nm, for example, 10nm, 50nm, 100nm, 200nm, 400nm, 500nm, 600nm, 800nm, 900nm, etc., preferably 150 nm to 300 nm. The thickness of the electrolyte layer may be 0.01 to 100. mu.m, and for example, may be 0.1. mu.m, 1. mu.m, 5. mu.m, 10. mu.m, 20. mu.m, 50. mu.m, 70. mu.m, 80. mu.m, 90. mu.m, etc., preferably 2 to 25. mu.m. The thickness of the protective layer is 1 to 1000. mu.m, and may be, for example, 5. mu.m, 10. mu.m, 20. mu.m, 50. mu.m, 100. mu.m, 200. mu.m, 500. mu.m, 800. mu.m, or the like.

As long as can satisfy the utility model discloses the application requires the component material constitute different structural layers, all can be applied to the utility model discloses. The utility model discloses also not specifically inject every layer thickness, as long as can satisfy the application requirement, all can adopt.

Preferably, the first conductive layer and the second conductive layer respectively and independently comprise any one of Indium Tin Oxide (ITO), Aluminum Zinc Oxide (AZO), fluorine-doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal mesh transparent conductive electrodes or nano silver paste or a combination of at least two of the above.

Preferably, the material of the first transparent substrate and the second transparent substrate is independently glass or a flexible substrate material, and the flexible material includes, but is not limited to, polyethylene terephthalate (polyethylene terephthalate), cyclic olefin copolymer (cyclic olefin copolymer), and cellulose triacetate (triacetate cellulose).

Preferably, the composition of the ion storage layer includes any one of oxides or complexes formed by metal elements in seven sub-groups and group VIII (refer to groups IIIB, IVB, VB, VIB, VIIB, VIII, IB, and IIB) capable of storing ions during electrochemical reaction, or a combination of at least two of the oxides or complexes. Refers to a certain metal oxide, or a combination of two or more metal oxides, or a certain metal complex, or a combination of two or more metal complexes, or a combination of a metal complex and a metal oxide.

When more than two metal oxides are selected, this is referred to as a doped form, e.g. Nb₂O₅Doped with 5 wt% TiO₂。

Preferably, the metal includes any one of titanium (Ti), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), iron (Fe), cobalt (Co), iridium (Ir), nickel (Ni), copper (Cu), zinc (Zn), or a combination of at least two thereof.

Preferably, the complex is selected from transition metal complexes, such as Prussian green, Prussian white, Prussian brown or sky blue Fe₄[Fe(CN)₆]₃Ferrous oxide, ferric oxide, ferroferric oxide, KFeFe (CN)₆、FeNiHCF、FeHCF, NiHCF, Prussian blue nanoparticles or N_xM_y{Fe(CN)₆M represents a metal element including iron (Fe), cobalt (Co), nickel (Ni), manganese (Mn), zinc (Zn), copper (Cu), etc., and N represents an alkali metal ion such as Na, K, etc.

Preferably, the composition of the ion storage layer further comprises a redox-active polymer.

In the present invention, the ion storage layer may be a mixed system of a transition metal complex and a metal oxide, a mixed system of a transition metal complex and a polymer having redox activity, a mixed system of a metal oxide and a polymer having redox activity, or the like.

The redox active polymer comprises a polymer formed by pyrrole and pyrrole derivatives, a polymer formed by thiophene and thiophene derivatives, a polymer containing TEMPO (tetramethylpiperidine nitroxide) and derivatives thereof, a polymer containing viologen and derivatives thereof and the like.

The redox-active polymer may include, but is not limited to, redox-active nitroxide or semi-vinyl radical polymers such as: poly (nitronitrostyrene), poly (propylenedioxystyrene), conjugated polymers (including polyaniline, PEDOT: PSS, polypyrrole, etc.).

Preferably, the electrochromic material layer comprises any one or a combination of any two of non-ferrous metal oxide, polydecylviologen and its derivatives, benzalkonium polymer (poly (decylviologen)) and its derivatives, polyaniline (polyaniline) and its derivatives, polypyrrole (polypyrrone) and its derivatives, polythiophene (polythiophene) and its derivatives, poly (3,4-ethylenedioxythiophene) and its derivatives, polypropyleneoxythiophene (poly (propylethylenedioxythiophene)) and its derivatives, polyisofluoroether (polyfurane) and its derivatives, polythieno [3,4-b ] [1,4] dioxepane and its derivatives, polyfuran and its derivatives, polyfluorene (polyfluorene) and its derivatives, or polycarbazole (polycarbazole) and its derivatives, and/or copolymers of monomers or oligomers of the above polymers with electron deficient monomers; the polymer refers to polydecylviologen and derivatives thereof, benzylviologen polymers and derivatives thereof, polyaniline and derivatives thereof, polypyrrole and derivatives thereof, polythiophene and derivatives thereof, poly 3,4-ethylenedioxythiophene and derivatives thereof, polypropylenedioxythiophene and derivatives thereof, polyisofluoroether and derivatives thereof, polythieno [3,4-b ] [1,4] dioxepane and derivatives thereof, polyfuran and derivatives thereof, polyfluorene and derivatives thereof, or polycarbazole and derivatives thereof.

Preferably, the electron-deficient monomer includes any one of or a combination of at least two of benzothiadiazole (benzothiadiazoles), benzoselenadiazole (benzoselenadiazoles), benzoxazole (benzoxazoles), benzotriazole (benzotriazoles), benzimidazole (benzoimidazoles), quinoxaline (quinoxalines), or pyrrolopyrrolediones (diketopyrrolopyrroles).

Preferably, the electrolyte layer is selected from a gel state electrolyte layer, a liquid state electrolyte layer or a solid state electrolyte layer, further preferably a solid state electrolyte layer, still further preferably a solid state flexible electrolyte layer.

Flexibility indicates, the material possesses certain pliability, the material can be crooked, tensile, twist reverse etc. its physics, chemical properties can not all change when deformation takes place and after taking place.

In the prior art at present, gel state electrolyte or liquid state electrolyte is generally selected, because the two are easy to obtain higher ionic conductivity, but gel state electrolyte or liquid state electrolyte has shorter service life and poorer stability, and can not be applied to large-size devices, therefore, the utility model discloses the solid state electrolyte has been optimized specifically, has better stability, security and machinability good.

Since the electrochromic device requires high transparency, the solid electrolyte in the conventional sense is not generally applicable except for inorganic solid electrolytes such as lithium phosphorus oxynitride (Lipon) which has too low ionic conductivity to be treated only by a high vacuum sputtering method, or solid electrolytes formed by mixing polymers and plasticizers, for example, by blending polyethylene oxide (PEO) with succinonitrile and lithium salt, a solid electrolyte having higher conductivity can be obtained, but small molecular plasticizers in conventional solid electrolyte materials easily permeate into the color-changing layer to destroy the device.

The preferred solid flexible electrolyte layer of the present invention has high transparency and good ionic conductivity (>10^-6S/cm) and high stability,

preferably, the solid flexible electrolyte layer contains less than or equal to 30 wt%, such as 25 wt%, 20 wt%, 15 wt%, 10 wt%, 5 wt% and the like of neutral organic small molecules with a molecular weight less than or equal to 3000, such as 2500, 2000, 1500, 1000, 500 and the like.

Preferably, the composition of the solid electrolyte layer includes a solid electrolyte polymer having a covalently bonded plasticizing group.

Preferably, the composition of the solid electrolyte layer includes a copolymer of a monomer or oligomer having a plasticizing group in a side chain thereof and an ion-conductive polymer, and further preferably, the composition of the solid electrolyte layer further includes a monomer or oligomer segment having a crosslinking group in a side chain thereof.

"further preferably" of the present invention means that, in the above definition, the composition of the solid electrolyte layer includes a monomer or oligomer segment having a crosslinking group in a side chain, preferably, on the premise that the composition of the solid electrolyte layer includes a copolymer of a monomer or oligomer and an ion-conductive polymer; the same is true for "further preferred" in the following.

The plasticizing group and the plasticizing group refer to groups which can weaken the interaction between macromolecules and reduce the crystallinity of the macromolecules.

Preferably, the composition of the solid electrolyte layer includes a plasticized linear polymer and an ion-conductive polymer, which are chemically bonded, the plasticized linear polymer having a glass transition temperature of less than-20 ℃, for example, -21 ℃, -22 ℃, -23 ℃, -25 ℃, -28 ℃, -30 ℃, -32 ℃, -35 ℃, -40 ℃, and the like, and further preferably, the composition of the solid electrolyte layer further includes a monomer or polymer having a crosslinking group on a side chain, the monomer or polymer having a crosslinking group on a side chain being chemically bonded to all of the plasticized linear polymer and the ion-conductive polymer.

Preferably, the solid electrolyte layer comprises a polymer with a plasticizing group on a side chain and a glass transition temperature lower than-20 ℃ and an ion-conducting polymer which are connected in a chemical bond, and further preferably, the solid electrolyte layer also comprises a monomer or a polymer with a crosslinking group on a side chain, wherein the monomer or the polymer with the crosslinking group on the side chain is connected with the polymer with the plasticizing group on the side chain and the ion-conducting polymer with the glass transition temperature lower than-20 ℃ in a chemical bond.

Preferably, the composition of the solid electrolyte layer includes a brush polymer having a flexible polymer main chain, ion-conductive side chains, and immiscible side chains, and further preferably, the composition of the solid electrolyte layer further includes a monomer or oligomer having a crosslinking group on a side chain, the monomer or oligomer having a crosslinking group on a side chain being chemically bonded to the brush polymer in a block copolymerization form.

The immiscible side chain refer to and other side chains or polymer nature difference are big, the side chain of can not effective blending, and the utility model provides a brush form polymer indicates that the main chain of polymer is flexible polymer, and the side chain has two kinds, and a side chain is used for leading the ion, and another kind of side chain is great with leading ion side chain performance difference, other types side chains that can not effective blending. The utility model discloses introduce the degree of crystallinity that this kind of immiscible side chain can reduce the polymer, makes the polymer be in random state, and then improves the whole ion conduction ability of polymer and transparency.

In the present invention, the raw material for preparing the solid-state flexible electrolyte layer comprises all-solid-state polymer electrolyte material derived from the following four main polymers.

Wherein x, y, and z are each independently selected from integers greater than 0. The rectangles shown in the figure represent polymer blocks having an ion-conducting function (ion-conducting polymer blocks), and the ovals represent monomers or polymers having side chains of PR (plasticizing group), or CL (crosslinking group), or NM (immiscible group), or IC (ion-conducting group).

(1)

A block copolymer (denoted by PEGPRCL) formed by copolymerizing a polymer block y with an ion-conducting function (such as polyethylene glycol or other materials reported in the literature) with a monomer or polymer block x having a plasticizing group (PR) on a side chain and a monomer or polymer block z having a crosslinking group (CL) on a side chain. Or a block copolymer (represented by PEGPR) formed by copolymerizing a polymer block y with an ion-conducting function (such as polyethylene glycol or other materials reported in the literature) and a monomer or polymer block x with a plasticizing group (PR) on a side chain.

(2)

A block copolymer (represented by PEGSPCL) formed by copolymerizing a polymer block y with an ion-conducting function (such as polyethylene glycol or other materials reported in the literature) and a linear plasticized polymer (SP) block x with a glass transition temperature of less than-20 ℃ (such as polyethylene, polybutylene, polyisobutylene, siloxane or other materials reported in the literature) and a monomer or polymer block z with a crosslinking group (CL) on a side chain. Or a block copolymer (denoted as PEGSP) formed by linking a polymer block y with an ion-conducting function (such as polyethylene glycol or other materials reported in the literature) with a linear plasticized polymer (SP) block x having a glass transition temperature of less than-20 ℃ (such as polyethylene, polybutylene, polyisobutylene, siloxane, or other materials reported in the literature).

(3)

The block copolymer (denoted by PEGSP-PRCL) is formed by linking a polymer block y having ion conductivity (such as polyethylene glycol or other materials reported in the literature) with a plasticized polymer (SP-PR) block x having plasticized side chains by chemical reaction, and copolymerizing the block with a monomer or oligomer (CL) block z having a crosslinking group on the side chains. Or a block copolymer (PEGSP-P R) formed by linking a polymer block y having ion conductivity (such as polyethylene glycol or other materials reported in the literature) with a plasticized polymer (SP-PR) block x having a plasticized side chain by chemical reaction.

(4)

The flexible polymer block x with side chain of oligomer or polymer (such as polyethylene glycol or other materials reported in literature) with ion conducting function and the flexible polymer block y with side chain (such as alkyl, aromatic or alkyl, aromatic mixed side chain) not blended with ion conducting polymer are connected by chemical reaction, and then copolymerized with monomer or oligomer (CL) block z with crosslinking group on the side chain to form comb-shaped block copolymer (ICNMCL). Or a comb-shaped block copolymer (ICNM) formed by connecting a flexible polymer block x with an oligomer or polymer (such as polyethylene glycol or other materials reported in the literature) with an ion-conducting function as a side chain and a flexible polymer block y with a side chain which is not blended with an ion-conducting polymer, such as a side chain of alkyl, aromatic or alkyl and aromatic mixture.

The above-mentioned polymer material for the electrolyte layer also needs to be blended with a certain amount of organic and inorganic salts to form an electrolyte precursor. Inorganic salts include, but are not limited to, cations of Li⁺、Na⁺、K⁺、Mg²⁺、Ca²⁺、Al³⁺Inorganic salts of (a), organic salts including but not limited to ionic liquids,such as 1-ethyl-3-methylimidazole bistrifluoromethylsulfonyl imide salt (EMI-TFSI), 1-ethyl-3-methylimidazole trifluoromethylsulfonate salt (EMIOTf), and the like. In some cases, it is also necessary to introduce an initiator to blend to form an electrolyte precursor, and the electrolyte precursor is crosslinked by heating, photo-initiation, etc. to form the final all-solid electrolyte.

In the present invention, for the sake of easier understanding, the four types of polymers are exemplified as follows:

the polymer A belongs to a PEGPRCL solid electrolyte polymer in (1), and the preparation method comprises the following steps:

bromoisobutyric acid-terminated PEG (polyethylene glycol), acrylates with plasticizing groups, crosslinking groups with two acrylic acids, monovalent copper catalysts and PMDETA (N, N', N "-pentamethyldiethylenetriamine) ligands were added to a suitable organic solvent. The mixed solution reacts for 1 to 48 hours at the temperature of between 50 and 130 ℃, and the polymer solid electrolyte is obtained by filtering the mixed solution through diatomite and removing the solvent under reduced pressure. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The polymer B belongs to the solid electrolyte polymer of the PEGPR in the (1), and the preparation method is as follows:

adding PEG diamine (polyethylene glycol diamine) and phthaloyl chloride into a proper organic solvent, directly polymerizing under an alkaline condition, and performing water washing, liquid separation, drying and solvent removal to obtain the polyelectrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The macromolecule C belongs to the solid electrolyte polymer of PEGSPCL in the step (2), and the preparation method is as follows:

adding PEG (polyethylene glycol), polysiloxane diamine, cross-linking agent tetramine and condensing agent CDI (carbonyl diimidazole) into a proper organic solvent; reacting at 10-130 ℃, separating liquid by washing, drying and removing the solvent to obtain the polyelectrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The polymer D, which belongs to the PEGSP solid electrolyte polymer in (2), is prepared by the following steps:

adding PEG (polyethylene glycol), polysiloxane diamine and a condensing agent CDI (carbonyl diimidazole) into a proper organic solvent, reacting at 10-130 ℃, washing with water, separating liquid, drying, and removing the solvent to obtain the polyelectrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The polymer E belongs to (3) PEGSP-PRCL solid electrolyte polymer, and the preparation method comprises the following steps:

adding PEG (polyethylene glycol), polysiloxane glycol, cross-linking agent tetrol and condensing agent CDI (carbonyl diimidazole) into a proper organic solvent, reacting at 10-130 ℃, separating by water washing, drying, and removing the solvent to obtain the polyelectrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The polymer F belongs to the PEGSP-PR solid electrolyte polymer in the step (3), and the preparation method comprises the following steps:

adding PEG (polyethylene glycol), polysiloxane glycol and a condensing agent CDI (carbonyl diimidazole) into a proper organic solvent, reacting at 10-130 ℃, washing with water, separating liquid, drying, and removing the solvent to obtain the polyelectrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The polymer G belongs to the ICNMCL solid electrolyte polymer in (4), and the preparation method is as follows:

adding alkyl acrylate, polyethylene glycol acrylate, ethylene glycol diacrylate and AIBN (azodiisobutyronitrile) into a proper organic solvent, carrying out light irradiation or heating reaction, then carrying out water washing liquid separation, drying and solvent removal to obtain the polymer electrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

The macromolecule H belongs to a solid electrolyte polymer of ICNM in (4), and the preparation method comprises the following steps:

adding alkyl acrylate, polyethylene glycol acrylate and AIBN (azodiisobutyronitrile) into a proper organic solvent, carrying out light irradiation or heating reaction, then carrying out water washing liquid separation, drying and solvent removal to obtain the polymer electrolyte. The mixture without added solvent can also be used as an electrolyte precursor directly for device fabrication.

When the present invention utilizes the four polymers (1) - (4), specifically, the polymer a-H, to prepare the all-solid-state flexible electrolyte layer, it needs to be mixed with organic and inorganic salts and then cross-linked, illustratively, the polymer is mixed with lithium salt and ultraviolet curing initiator at a mass ratio of 45:45:10, after magnetic stirring for 30 minutes, the mixture is degassed for 30 minutes by using ultrasonic vibration to obtain a precursor solution, and the precursor solution can be coated by coating or the like to obtain the solid-state flexible electrolyte layer.

The utility model discloses the protective layer that uses can satisfy the application requirement for transparent material, obtains the flexion for the convenience of bending, prefers flexible transparent material, and any transparent flexible material that can satisfy the application requirement all can use, for example polyethylene terephthalate (polyethylene terephthalate), cyclic olefin copolymer (cyclic olefin copolymer), cellulose triacetate (triacetate cellulose) etc..

The utility model discloses preferred each layer is flexible solid-state layer, and especially the electrolyte layer is flexible full solid-state electrolyte layer, therefore the electrochromic device that obtains at last has extremely extensive range of application for flexible full solid-state electrochromic device, both can be applied to planar structure, also can be applied to curved surface or folding crooked structure, still has excellent result of use after the bending is folding, can realize the integration effect of discolouing. The utility model provides a flexible all solid state device has that the range of application is wide, high stability, and the beneficial effect of easily processing.

In a third aspect, the present invention provides the use of an electrochromic device according to the first aspect in a front display, a back housing or a protective housing of an electronic terminal device.

Preferably, the electronic terminal device comprises a mobile phone, a tablet computer, a notebook computer, a desktop computer, a television, a camera, a microscope, an LED display screen or an OLED display screen.

Preferably, the protective shell is used for protecting electronic terminal equipment, and comprises a mobile phone shell or a tablet computer protective shell and the like.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model provides an electrochromic device is when using, and the film main part can regard as the main part to laminate in electronic terminal's backplate, perhaps can regard as electronic terminal's display screen, and first flexion and second flexion laminate in electronic terminal's frame, can realize electrochromic's integration effect like this.

(2) The utility model provides an electrochromic device both can regard as the display screen to use, also can match the electronic terminal equipment that has special function district (camera or fingerprint collection function etc.), no matter whether special function district is planar design, all can satisfy the application requirement.

(3) The utility model discloses the preferred flexible all solid state electrochromic device, each layer structure that wherein includes is flexible solid state structure, and flexible solid state electrolyte layer is also preferred to the electrolyte layer; the flexible all-solid-state electrochromic device can be applied to a planar structure and can also be applied to a bendable and foldable structure.

Drawings

Fig. 1 is a schematic structural view of providing a through hole.

FIG. 2 is a first schematic structural diagram of blind holes.

Fig. 3 is a schematic structural diagram ii of the blind hole arrangement.

Fig. 4 is a schematic diagram of a third structure of providing a blind hole, wherein the blind hole is provided with a second electrochromic device therein.

Fig. 5 is a fourth schematic structural diagram of blind holes.

Fig. 6 is a schematic structural diagram five of the blind hole arrangement, wherein the blind hole is provided with a third electrochromic device therein.

Fig. 7 is a schematic view of the morphology structure of the electrochromic device provided in embodiment 1 of the present invention.

Fig. 8 is a schematic diagram of the distribution of the interlayer structure of the electrochromic device provided in embodiment 1 of the present invention.

Fig. 9 is a schematic view of a morphology structure of an electrochromic device provided in embodiment 2 of the present invention.

Fig. 10 is a schematic view of the distribution of the interlayer structure of the electrochromic device provided in embodiment 3 of the present invention.

Fig. 11 is a schematic diagram of the distribution of the interlayer structure of the electrochromic device provided in embodiment 4 of the present invention.

Wherein, 1-film body portion; 11-a first protective layer; 12-a first transparent conductive layer; 1201-a third transparent conductive layer; 1202-a fifth transparent conductive layer; 13-a color change layer; 1301-a second color changing layer; 1302-a third color changing layer; 131-a layer of electrochromic material; 132-an electrolyte layer; 133-an ion storage layer; 14-a second transparent conductive layer; 1401-a fourth transparent conductive layer; 1402-sixth transparent conductive layer; 15-a second transparent protective layer; 1502-a third transparent protective layer; 2-a first bend; 3-a second bend; 4-electrode lead; 5-through hole.

Fig. 12 is a schematic structural diagram of a mobile phone having an electrochromic function according to application example 1 of the present invention.

10-a mobile phone main body; 20-an electrochromic device; 30-a rear shell; 301-circuit board.

Detailed Description

The technical solution of the present invention will be further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.

Note that the first transparent protective layer is also referred to as a first protective portion, the first transparent conductive layer is also referred to as a first conductive portion, the second transparent protective layer is referred to as a third protective portion, and the second transparent conductive layer is referred to as a third conductive portion in the thin film main body portion, but in the following embodiments and application examples, the first protective portion, the first conductive portion, and the like are not specifically written in the thin film main body portion in order to avoid the number of marks being excessively large and being easily confused.

In the following embodiments, although the thickness range of each layer is specifically treated, the present invention is actually applicable to the field of workers who work in the field and can adjust the thickness range according to the actual situation, and all the thickness ranges are included in the protection scope of the present invention.

Example 1

An electrochromic device, as shown in fig. 7, includes a thin film main body portion 1, a first curved portion 2, and a second curved portion 3.

Wherein, the first bending part 2 and the second bending part 3 are respectively positioned at the left and right sides of the film main body part (namely, the left and right frames).

As shown in fig. 8, the electrochromic device is composed of a first transparent conductive layer 12, a color-changing layer 13, and a second transparent conductive layer 14 in this order.

Among them, the coloring layer 13 is composed of an electrochromic material layer 131, an electrolyte layer 132, and an ion storage layer 133.

The first transparent conductive layer 12 includes a first conductive portion and a second conductive portion, the second transparent conductive layer 14 includes a third conductive portion and a fourth conductive portion, the color-changing layer 13 is located between the first conductive portion and the third conductive portion, the first conductive portion, the color-changing layer and the third conductive portion together form the thin film main body portion 1, the second conductive portion is bent to form the first bending portion 2, and the fourth conductive portion is bent to form the second bending portion 3.

Wherein the first and second bent portions are provided with electrode leads 4, respectively.

The first transparent conductive layer 12 is composed of an indium tin oxide layer (thickness 30nm) and a polyethylene terephthalate (PET) layer, and is purchased from jiangsu jieshu photoelectricity, and is numbered I100-SE 125-P1.

The electrochromic material layer 131 has a composition of poly (ethylhexane) propyldioxythiophene (poly (ethylhexane) having a thickness of 200 nm.

The electrolyte layer 132 was a solid flexible electrolyte layer obtained using the polymer a, and had a thickness of 18 μm.

The ion storage layer 133 was composed of prussian blue and had a thickness of 200 nm.

The second transparent conductive layer 14 is indium tin oxide and has a thickness of 30 nm.

Examples 1.2 to 1.8

The difference from example 1 is that the constituent materials of the electrolyte layer were replaced with polymers B to H.

Example 2

An electrochromic device, as shown in fig. 9, differs from embodiment 1 in that both the first bending portion 2 and the second bending portion 3 are located on the lower side of the film main body portion (i.e., at the lower frame).

Example 3

An electrochromic device, as shown in fig. 10, differs from embodiment 1 in that it includes a first protective layer 11, and the first protective layer 11 is located on the side of the first transparent conductive layer 12 away from the color-changing layer 13.

The first protective layer 11 includes a first protective portion and a second protective portion, and the first transparent conductive layer 12 includes a first conductive portion and a second conductive portion; the second transparent conductive layer 14 includes a third conductive part and a fourth conductive part, the color changing layer 13 is located between the first conductive part and the third conductive part, the first protection part, the first conductive part, the color changing layer and the third conductive part together form the film main body part 1, the second protection part covers the second conductive part, the first protection part, the first conductive part, the color changing layer and the third conductive part are bent together to form the first bending part 2, and the fourth conductive part is bent to form the second bending part 3.

Wherein the first protection part and the second protection part are both polyethylene terephthalate (PET) and have the thickness of 125 μm.

Example 4

An electrochromic device, as shown in fig. 11, differs from embodiment 3 in that a second transparent protective layer 15 is included, and the second transparent protective layer 15 is located on the side of the second transparent conductive layer 14 away from the color-changing layer 13.

The first transparent protection layer 11 includes a first protection portion and a second protection portion, and the first transparent conductive layer 12 includes a first conductive portion and a second conductive portion; the second transparent protection layer 15 includes a third protection portion and a fourth protection portion, the second transparent conductive layer 14 includes a third conductive portion and a fourth conductive portion, the color-changing layer 13 is located between the first conductive portion and the third conductive portion, and the first protection portion, the first conductive portion, the color-changing layer, the third conductive portion and the third protection portion jointly form the film main body portion 1, the second protection portion covers the second conductive portion, the first protection portion and the second conductive portion jointly bend to form the first bending portion 2, the fourth protection portion covers the fourth conductive portion, and the second protection portion and the fourth protection portion jointly bend to form the second bending portion 3.

Wherein the second transparent protective layer is PET, and the thickness is 125 μm.

Example 5

An electrochromic device is different from embodiment 1 in that, as shown in fig. 1, a thin film main body portion 1 has a through hole 5.

Example 6

An electrochromic device is different from embodiment 3 in that a thin film main body portion has a through hole.

Example 7

An electrochromic device is different from embodiment 3 in that a film main body portion is provided with blind holes, and the blind holes are arranged in the following manner:

as shown in fig. 2, in the film main body portion, through holes are provided for the first transparent conductive layer 12, the discoloring layer 13, and the second transparent conductive layer 14, and blind holes are formed together with the first transparent protective layer 11.

Example 8

as shown in fig. 3, in the film main body portion, second through holes are provided for the first transparent conductive layer 12, the discoloring layer 13, and the second transparent conductive layer 14, and second blind holes are provided for the first protective layer 11, and the second through holes and the second blind holes are correspondingly provided to form blind holes together with the first protective layer 11.

Example 9

as shown in fig. 4, in the film main body portion, through holes are provided for the first transparent conductive layer 12, the discoloring layer 13, and the second transparent conductive layer 14, and blind holes are formed together with the first protective layer 11;

and a second electrochromic device is arranged at the bottom of the blind hole and comprises a third transparent conducting layer 1201, a second color-changing layer 1301 and a fourth transparent conducting layer 1401.

The materials and thicknesses of the layers of the second electrochromic device are the same as those of the electrochromic device provided in example 3.

Example 10

An electrochromic device differs from example 9 in that the thickness of the second electrochromic device is different.

Wherein the total thickness of the second electrochromic device is reduced; the reduction of the total thickness of the second electrochromic device can be achieved by reducing the thickness of the third transparent conductive layer, or the thickness of the second color-changing layer, or the thickness of the fourth transparent conductive layer;

the total thickness of the second electrochromic device can also be reduced by respectively reducing the thicknesses of the third transparent conducting layer and the second color-changing layer, or respectively reducing the thicknesses of the second color-changing layer and the fourth transparent conducting layer, or respectively reducing the thicknesses of the third transparent conducting layer and the fourth transparent conducting layer;

the overall thickness reduction of the second electrochromic device may also be achieved by reducing the thickness of the third transparent conductive layer, the second color changing layer and the fourth transparent conductive layer, respectively.

For the reduction of the thickness of the color-changing layer, the thickness of the electrochromic material layer, the electrolyte layer or the ion storage layer can be reduced, or the thickness of the electrochromic material layer and the thickness of the electrolyte layer can be reduced, or the thickness of the electrolyte layer and the thickness of the ion storage layer can be reduced, or the thickness of the electrochromic material layer and the thickness of the ion storage layer can be reduced, so that the thickness of the color-changing layer can be reduced.

Example 11

An electrochromic device was distinguished from example 10 in that this example provided an electrochromic device that did not include a first protective layer.

Example 12

An electrochromic device differs from embodiment 4 in that a thin film main body portion has blind holes arranged in the following manner:

as shown in fig. 5, in the film main body portion, the second transparent protective layer 15 is provided with a through hole, and a blind hole is formed together with the first protective layer 11, the first transparent conductive layer 12, the discoloring layer 13, and the second transparent conductive layer 14.

Example 13

as shown in fig. 6, in the film main body portion, through holes are provided for the first transparent conductive layer 12, the discoloration layer 13, the second transparent conductive layer 14, and the second transparent protective layer 15, and blind holes are formed together with the first protective layer 11;

the bottom of the blind hole is provided with a third electrochromic device, the third electrochromic device includes a fifth transparent conductive layer 1202, a third color-changing layer 1302, a sixth transparent conductive layer 1402 and a third transparent protection layer 1502, and the third transparent protection layer 1502 is located on the side far away from the first protection layer 11.

The material and thickness of each layer of the third electrochromic device are the same as those of the electrochromic device provided in example 4.

Example 14

An electrochromic device was distinguished from example 13 in that the thickness of the third electrochromic device was different.

Wherein the total thickness of the third electrochromic device is reduced; the total thickness reduction of the third electrochromic device may be achieved by reducing the thickness of the fifth transparent conductive layer, the third color-changing layer, the sixth transparent conductive layer or the third transparent protective layer;

the total thickness reduction of the third electrochromic device can also be realized by respectively reducing the thickness of certain two layers;

the total thickness reduction of the third electrochromic device can also be achieved by reducing the thickness of some of the three layers respectively;

the overall thickness reduction of the third electrochromic device can also be achieved by reducing the thickness of each of the four layers;

wherein the color-changing layer comprises an electrochromic material layer, an electrolyte layer and an ion storage layer, and therefore, the thickness reduction of the color-changing layer can be realized by reducing the thickness of the electrochromic material layer, the electrolyte layer or the ion storage layer, or by reducing the thickness of some two of the electrochromic material layer, the electrolyte layer or the ion storage layer, or by reducing the thickness of three layers respectively.

Example 15

The electrochromic device is different from the electrochromic device in embodiment 1 in that the electrochromic device further includes a reflective film layer, and the reflective film layer is disposed on one side of the second transparent conductive layer, which is far away from the color-changing layer.

Example 16

An electrochromic device is different from that in embodiment 4, in that the electrochromic device further includes a reflective film layer, and the reflective film layer is disposed between the second transparent protective layer and the second transparent conductive layer.

Example 17

An electrochromic device differs from embodiment 1 in that a cover plate is provided on the side of the first protective layer remote from the color-changing layer.

The cover plate comprises a main body part, a third bending part and a fourth bending part, the main body part covers the first conductive part, the third bending part covers the first bending part, and the fourth bending part covers the second bending part;

the main body part is made of transparent polymethyl methacrylate, and the third bending part and the fourth bending part are made of non-transparent ABS plastic.

Example 18

An electrochromic device is different from embodiment 1 in that electrode leads are electrically connected to a photosensitive element.

The electrochromic film provided by the embodiment can be applied as a part of a mobile phone rear shell, and the following applications are exemplified here:

application example 1

A mobile phone with electrochromic function, as shown in fig. 12, is composed of a mobile phone main body 10, an electrochromic device 20 provided in embodiment 1, and a rear case 30, wherein a circuit board 301 is provided on a side frame of the rear case 30.

The preparation method comprises the following steps: and printing electrodes in the reserved printing electrode area, connecting electrode leads arranged on a first bending part and a second bending part of the electrochromic device 20 with the circuit board 301, simultaneously attaching the electrochromic device 20 with the rear shell, and assembling the electrochromic device 20 and the mobile phone main body together to obtain the mobile phone with the electrochromic function.

Application example 2

A mobile phone with an electrochromic function comprises a mobile phone main body, an electrochromic device and a rear shell, wherein the electrochromic device is provided in embodiment 5, a circuit board is arranged on a side frame of the mobile phone main body, and the rear shell is also provided with through holes corresponding to the through holes of the electrochromic device.

The preparation method was the same as in application example 1.

Application example 3

A mobile phone having an electrochromic function is different from application example 2 in that the electrochromic device provided in example 13 is used, and a third electrochromic device has a thin lead wire led out to be connected to a circuit board.

Application example 4

A mobile phone protection shell is composed of an electrochromic device and a cover plate, wherein a circuit board is arranged on the cover plate.

The preparation method comprises the following steps: and connecting electrode leads arranged on the first bending part and the second bending part of the electrochromic device with the circuit board, and bonding the electrochromic device with the cover plate to obtain the mobile phone protective shell.

Application example 5

A protective case for a mobile phone, comprising an electrochromic device and a cover plate provided in embodiment 14, wherein the cover plate is provided with a circuit board, and the cover plate is also provided with through holes at positions corresponding to blind holes of the electrochromic device.

Application example 6

A mobile phone protection shell is composed of an electrochromic device and a cover plate, wherein the cover plate is provided with a circuit board, and the cover plate is provided with through holes at positions corresponding to blind holes of the electrochromic device.

The preparation method comprises the following steps: referring to application example 5, the difference is that the second electrochromic device is connected to the circuit board by a thin lead wire.

Application example 7

The utility model provides an outer of display screen with electrochromic function, is located the liquid crystal display outside, comprises cell-phone main part, the electrochromic device and the apron that embodiment 2 provided, and wherein, the circuit board is arranged in the display screen and leans on cell-phone main part one side.

Or the liquid crystal display may be replaced with an organic light emitting diode.

Application example 8

A flat plate with an electrochromic function comprises a flat plate main body, an electrochromic device and a rear shell, wherein the side frame of the rear shell is provided with a circuit board.

The preparation method refers to application example 1.

The applicant states that the present invention is illustrated by the above embodiments and the application of the electrochromic device of the present invention, but the present invention is not limited to the above process steps, i.e. it does not mean that the present invention must rely on the above process steps to be implemented. It should be clear to those skilled in the art that any improvement of the present invention is to the equivalent replacement of the selected raw materials, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. An electrochromic device is characterized by comprising a first transparent conducting layer, a color changing layer and a second transparent conducting layer which are sequentially arranged;

the first transparent conducting layer comprises a first conducting part and a second conducting part, the second transparent conducting layer comprises a third conducting part and a fourth conducting part, the color changing layer is positioned between the first conducting part and the third conducting part, the color changing layer and the third conducting part form a film main body part together, the second conducting part is bent to form a first bent part, and the fourth conducting part is bent to form a second bent part;

2. The electrochromic device according to claim 1, further comprising a first protective layer on a side of the first transparent conductive layer remote from the color-changing layer; the first protective layer is made of transparent materials; preferably, the first protection layer includes a first protection portion and a second protection portion, the first protection portion covers the first conductive portion, the second protection portion covers the second conductive portion, and the second protection portion is made of a non-transparent material.

3. The electrochromic device of claim 2, further comprising a cover plate on a side of the first protective layer remote from the color shifting layer; the cover plate comprises a third bending part and a fourth bending part, the third bending part covers the first bending part, and the fourth bending part covers the second bending part; the cover plate further comprises a main body part, and the main body part covers the first conductive part; the third bending portion and the fourth bending portion are made of non-transparent materials, and the main body portion is made of transparent materials.

4. Electrochromic device according to claim 1, characterised in that the membrane body section is provided with a first blind hole and/or a first through hole.

5. The electrochromic device according to claim 4, wherein the electrochromic device comprises a first transparent protection layer on a side of the first transparent conductive layer away from the color-changing layer, and the first transparent conductive layer, the color-changing layer and the second transparent conductive layer are provided with through holes to form the first blind hole.

6. The electrochromic device according to claim 4, comprising a first transparent protective layer on a side of the first transparent conductive layer remote from the color changing layer, wherein the first transparent conductive layer, the color changing layer and the second transparent conductive layer are provided with second through holes, wherein the first transparent protective layer is provided with second blind holes, and wherein the second through holes and the second blind holes form the first blind holes.

7. The electrochromic device according to claim 4, wherein the electrochromic device comprises a first transparent protective layer positioned on one side of the first transparent conductive layer far from the color changing layer, the first transparent conductive layer, the color changing layer and the second transparent conductive layer are provided with third through holes to form the first blind hole, a second electrochromic device is arranged at the bottom of the first blind hole, and the thickness of the second electrochromic device is less than or equal to the total thickness of the first transparent conductive layer, the color changing layer and the second transparent conductive layer; wherein the second electrochromic device comprises a third transparent conductive layer, a second color-changing layer, and a fourth transparent conductive layer.

8. The electrochromic device according to claim 4, wherein the electrochromic device comprises a first transparent protection layer on the side of the first transparent conductive layer away from the color-changing layer and a second transparent protection layer on the side of the second transparent conductive layer away from the color-changing layer, and the second transparent protection layer is provided with a fourth blind hole or a fourth through hole, forming the first blind hole.

9. The electrochromic device according to claim 4, wherein the electrochromic device comprises a first transparent protection layer positioned on one side of the first transparent conducting layer away from the color changing layer and a second transparent protection layer positioned on one side of the second transparent conducting layer away from the color changing layer, the first transparent conducting layer, the color changing layer, the second transparent conducting layer and the second transparent protection layer are provided with fifth through holes to form the first blind hole, a third electrochromic device is arranged at the bottom of the first blind hole, and the thickness of the third electrochromic device is less than or equal to the total thickness of the first transparent conducting layer, the color changing layer, the second transparent conducting layer and the second transparent protection layer; the third electrochromic device comprises a fifth transparent conducting layer, a third color-changing layer, a sixth transparent conducting layer and a third transparent protective layer, and the third transparent protective layer is positioned on one side far away from the first transparent protective layer.

10. The electrochromic device according to claim 1, further comprising a light-reflecting film disposed on a side of the second transparent conductive layer remote from the color-changing layer;

preferably, the color changing layer of the electrochromic device has a design pattern;