CN116300238A

CN116300238A - Electrochromic device and rearview mirror

Info

Publication number: CN116300238A
Application number: CN202310300957.7A
Authority: CN
Inventors: 李佳城; 田汉
Original assignee: Guangyi Intelligent Technology Suzhou Co ltd
Current assignee: Guangyi Intelligent Technology Suzhou Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-06-23

Abstract

The application provides an electrochromic device and rear-view mirror, include: the electrochromic device comprises a first substrate, an electrochromic diaphragm and a second substrate, wherein the electrochromic diaphragm comprises a first conductive base layer, an electrochromic middle layer and a second conductive base layer; the sealant layer is positioned on the circumference of the electrochromic membrane, and forms a containing cavity together with the first substrate and the second substrate, and the containing cavity is suitable for containing the electrochromic membrane; a first extraction electrode, a part of which is arranged on the first conductive basal layer, and the other part of which is at least partially positioned in the sealant layer; a second extraction electrode, a part of which is arranged on the second conductive basal layer, and the other part of which is at least partially positioned in the sealant layer; wherein a first recess is provided in another portion of the first extraction electrode, or/and a second recess is provided in another portion of the second extraction electrode. The electrochromic device provided by the application promotes the curing effect of the sealant layer.

Description

Electrochromic device and rearview mirror

Technical Field

The application relates to the technical field of electrooptical technology, in particular to an electrochromic device and a rearview mirror.

Background

Electrochromic refers to a phenomenon that the optical properties of a material change in color stably and reversibly under the action of an applied electric field, and is represented by reversible changes in color and transparency in appearance. Materials with electrochromic properties are called electrochromic materials, devices made of electrochromic materials are called electrochromic devices, and along with the progress of technology and the increasing demands of people on living comfort, electrochromic devices are receiving more and more attention in the fields of consumer electronics, transportation means, construction, military and the like.

Taking the application of electrochromic devices in automobile rearview mirrors as an example, a driver needs to know the running condition of a rear vehicle by observing the rearview mirrors when driving, and when stronger light irradiates the rearview mirrors behind the vehicle, the rearview mirrors generate glare, so that the driver can hardly clearly see the rear vehicle condition, and larger potential safety hazards exist. Therefore, more and more rearview mirrors now adopt electrochromic technology, electrochromic devices are added to the rearview mirrors, and the rearview mirrors have anti-dazzle functions through the color changing function of the electrochromic devices, so that the rearview mirrors have important significance for safe driving.

The electrochromic device has high requirements on sealing performance, and a sealing adhesive layer is usually required to be arranged on the periphery of the electrochromic device so as to avoid the electrochromic device from being contacted with moisture and oxygen in the air to influence the color changing performance of the electrochromic device. In the prior art, a rear view mirror generally includes upper and lower substrates and an electrochromic device disposed between the two substrates, and thus a sealant layer is generally disposed between the upper and lower substrates, and the electrochromic device is electrically connected to an external power source through an extraction electrode. However, the sealant layer usually needs post-treatment to be cured, for example, heat curing or photo curing, and in the presence of the extraction electrode, the sealant layer can be shielded to a certain extent, so that the absorption of light or heat by the sealant layer is affected, the curing degree of the sealant layer is insufficient, and the sealing effect of the sealant layer is affected.

Disclosure of Invention

In view of the above, in order to overcome the defects in the prior art, the application provides an electrochromic device and a rearview mirror, so as to solve the technical problems of incomplete curing of a sealant layer and the like in the prior art.

An aspect of the present application provides an electrochromic device comprising: the electrochromic display device comprises a first substrate, an electrochromic film and a second substrate which are sequentially stacked, wherein the electrochromic film comprises a first conductive base layer, an electrochromic middle layer and a second conductive base layer which are sequentially stacked; the sealant layer is positioned on the circumference of the electrochromic membrane, and forms a containing cavity together with the first substrate and the second substrate, and the containing cavity is suitable for containing the electrochromic membrane; a first extraction electrode, a portion of which is disposed on the first conductive substrate layer, and another portion of which is at least partially within the sealant layer; a second extraction electrode, a portion of which is disposed on the second conductive substrate layer, and another portion of which is at least partially located within the sealant layer; wherein, a first groove is arranged on the other part of the first extraction electrode, or/and a second groove is arranged on the other part of the second extraction electrode.

Preferably, the first groove or/and the second groove at least partially exposes the sealant layer. More preferably, the first groove reduces the shielding area of the first extraction electrode to the sealant layer, or/and the second groove reduces the shielding area of the second extraction electrode to the sealant layer. Under the condition, through making the at least part of another part of extraction electrode set up in the sealant layer to set up the recess on another part of extraction electrode, can be according to the demand of actual conditions, the relative position relation of recess and sealant layer, in order to at least partly expose the sealant layer that is sheltered from by extraction electrode through the recess in different directions or angles, reduce the area of sheltering from of extraction electrode to the sealant layer, thereby in the sealant layer solidification process, reduce extraction electrode to the blocking effect of light or/and heat conduction, promote the solidification effect of sealant layer, for example shorten the solidification time of sealant layer or/and strengthen the solidification crosslinking degree etc. of sealant layer, and then improve the sealing performance of electrochromic device.

Optionally, the first groove is at least partially located in the sealant layer, or/and the second groove is at least partially located in the sealant layer. Preferably, a part of the first groove or the second groove is located in the sealant layer, and another part of the first groove or the second groove is located outside the sealant layer. More preferably, the first groove is entirely within the sealant layer, or/and the second groove is entirely within the sealant layer. In this case, by providing a groove on at least one of the first extraction electrode and the second extraction electrode, and making the groove at least partially (e.g., partially or completely) located within the sealant layer, whereby the groove located inside the sealant layer, its projection onto the first substrate or the second substrate, may at least partially cover the projection of the sealant layer onto the first substrate or the second substrate; in addition, the groove positioned outside the sealant layer can be at least partially exposed out of the sealant layer when the extraction electrode is bent to shield the sealant layer, so that the blocking effect of the extraction electrode on light or heat conduction can be reduced through the groove in the process of light or heat curing of the sealant layer, the curing effect of the sealant layer can be improved, for example, the curing time of the sealant layer can be shortened, the curing crosslinking degree of the sealant layer can be enhanced, and the like.

Optionally, the first groove is at least partially located outside the sealant layer, or/and the second groove is at least partially located outside the sealant layer. Preferably, the first groove is located entirely outside the sealant layer, or/and the second groove is located entirely outside the sealant layer. More preferably, a portion of the first groove or the second groove is located within the sealant layer, and another portion of the first groove or the second groove is located outside the sealant layer. In this case, by providing the recess on at least one of the first extraction electrode and the second extraction electrode such that the recess is located at least partially outside the sealant layer, for example completely outside the sealant layer, or partially inside the sealant layer and partially outside the sealant layer, whereby the recess located inside the sealant layer, its projection onto the first substrate or the second substrate, may at least partially cover the projection of the sealant layer onto the first substrate or the second substrate; in addition, the groove positioned outside the sealant layer can be at least partially exposed out of the sealant layer when the extraction electrode is bent to shield the sealant layer, so that the blocking effect of the extraction electrode on light or heat conduction can be reduced through the groove in the process of light or heat curing of the sealant layer, the curing effect of the sealant layer can be improved, for example, the curing time of the sealant layer can be shortened, the curing crosslinking degree of the sealant layer can be enhanced, and the like.

Optionally, the first groove penetrates the first extraction electrode in the thickness direction of the first extraction electrode or the second groove penetrates the second extraction electrode in the thickness direction of the second extraction electrode. Preferably, the first groove penetrates the first extraction electrode in a thickness direction of the first extraction electrode, and the second groove penetrates the second extraction electrode in a thickness direction of the second extraction electrode. That is, in the thickness direction of the extraction electrode, the groove can be a hollow groove which completely penetrates through the extraction electrode so as to at least partially expose the sealant layer, and the arrangement of the hollow groove can enable the exposure of the sealant layer to be more obvious, so that the shielding effect of the extraction electrode on the sealant layer is more comprehensively and effectively reduced, and the curing effect of the sealant layer is more comprehensively and effectively improved.

In addition, through making the recess run through the extraction electrode in the thickness direction of extraction electrode, even make the recess for running through the fretwork recess of extraction electrode completely, when recess part or when being located the sealant layer completely, the sealant layer that is located the extraction electrode thickness direction can also form the integral structure of connection through the recess to improve the connection stability of sealant layer, and promote the holistic sealed effect of electrochromic device.

Optionally, the first groove or the second groove is more than two. Preferably, the first groove and the second groove are two or more. In this case, on the one hand, the shielding area of the extraction electrode to the sealant layer can be further reduced by increasing the number of grooves; on the other hand, by increasing the number of the grooves instead of directly increasing the area of the grooves, the structural stability of the extraction electrode can be ensured under the condition of reducing the shielding area of the extraction electrode to the sealant layer, for example, the fracture possibility of the extraction electrode is reduced, so that the use stability and reliability of the electrochromic device are improved.

Optionally, two or more first grooves are disposed at intervals along the width direction of the first extraction electrode, or two or more second grooves are disposed at intervals along the width direction of the second extraction electrode. Preferably, two or more first grooves are disposed at intervals along the width direction of the first extraction electrode, and two or more second grooves are disposed at intervals along the width direction of the second extraction electrode. Therefore, the area of the groove is increased, and the extraction electrode can be ensured to have enough mechanical strength.

Optionally, along the width direction of the first extraction electrode, the size of the first extraction electrode is W1, and the size of the first groove is W3, where W1 and W3 satisfy the following relation: and W3/W1 is more than or equal to 0.06 and less than or equal to 0.3, or the size of the second extraction electrode is W2 along the width direction of the second extraction electrode, and the size of the second groove is W4, wherein W2 and W4 satisfy the following relation: W4/W2 is more than or equal to 0.06 and less than or equal to 0.3. Preferably, the dimension of the first extraction electrode is W1 and the dimension of the first groove is W3 along the width direction of the first extraction electrode, wherein W1 and W3 satisfy the following relation: 0.06.ltoreq.W3/W1.ltoreq.0.3, and along the width direction of the second extraction electrode, the size of the second extraction electrode is W2, the size of the second groove is W4, wherein W2 and W4 satisfy the following relation: W4/W2 is more than or equal to 0.06 and less than or equal to 0.3. In general, when the width of the groove is too large, although the area of the exposed sealant layer can be increased, the curing effect of the sealant layer is improved, the strength of the extraction electrode is low, for example, breakage and the like are easy to occur, and the use stability of the electrochromic device is affected; when the groove width is too small, the extraction electrode can maintain certain strength, such as difficult to break, but the area of the exposed sealant layer is reduced, so that the curing effect of the sealant layer is not improved. Therefore, the width of the groove is controlled within a certain range, the strength of the extraction electrode can be ensured, the extraction electrode is prevented from being broken, the shielding area of the extraction electrode to the sealant layer can be reduced, and the curing effect of the sealant layer is improved.

Optionally, the spacing between two or more first grooves is W5, where W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.06 and less than or equal to 0.08; alternatively, the spacing between two or more second grooves is W6, where W2 and W6 satisfy the following relationship: W6/W2 is more than or equal to 0.06 and less than or equal to 0.08. Preferably, the distance between two or more first grooves is W5, wherein W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.06 and less than or equal to 0.08; and, the interval between two or more second grooves is W6, wherein W2 and W6 satisfy the following relation: W6/W2 is more than or equal to 0.06 and less than or equal to 0.08. In general, when the width of the grooves is too large or/and the interval between the grooves is too small, although the area of the exposed sealant layer can be increased, the curing effect of the sealant layer is improved, the strength of the extraction electrode is low, for example, breakage is easy to occur, and the use stability of the electrochromic device is affected; when the width of the grooves is too small or/and the distance between the grooves is too large, the extraction electrode can keep certain strength, such as difficult to break, but the area of the exposed sealant layer is reduced, so that the curing effect of the sealant layer is not improved. Therefore, the width or/and the interval of the grooves are controlled within a certain range, the strength of the extraction electrode can be ensured, the extraction electrode is prevented from being broken, the shielding area of the extraction electrode to the sealant layer can be reduced, and the curing effect of the sealant layer is improved.

Optionally, the first extraction electrode has a first bending portion, the first groove and the first bending portion are spaced along the length direction of the first extraction electrode, or the second extraction electrode has a second bending portion, and the second groove and the second bending portion are spaced along the length direction of the second extraction electrode. Preferably, the first extraction electrode has a first bending portion, the first groove and the first bending portion are spaced apart along the length direction of the first extraction electrode, and the second extraction electrode has a second bending portion, and the second groove and the second bending portion are spaced apart along the length direction of the second extraction electrode. In general, the bending part of the extraction electrode receives certain bending stress, external extrusion acting force and the like, so that the requirement on the mechanical strength of the bending part is higher, and the mechanical strength of the extraction electrode is reduced due to the arrangement of the grooves; therefore, by arranging the space between the groove and the bending part, namely, the groove is not arranged at the bending part, the bending part of the extraction electrode can be ensured to have enough strength, the strength of the extraction electrode is improved, and the use stability and reliability of the electrochromic device are improved.

Optionally, the first extraction electrode includes a first transparent substrate layer, a first non-transparent conductive layer and a third transparent substrate layer, the first non-transparent conductive layer is located between the first transparent substrate layer and the third transparent substrate layer, and the first groove at least penetrates through the first non-transparent conductive layer; or the second extraction electrode comprises a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, the second non-transparent conductive layer is positioned between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates through the second non-transparent conductive layer. Preferably, the first extraction electrode comprises a first transparent substrate layer, a first non-transparent conductive layer and a third transparent substrate layer, the first non-transparent conductive layer is positioned between the first transparent substrate layer and the third transparent substrate layer, and the first groove at least penetrates through the first non-transparent conductive layer; and the second extraction electrode comprises a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, wherein the second non-transparent conductive layer is positioned between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates through the second non-transparent conductive layer. Therefore, the substrate layers of the extraction electrodes are all transparent materials, and the grooves at least penetrate through the non-transparent conductive layers, for example, only penetrate through the non-transparent conductive layers, but not penetrate through the first transparent substrate layers or the second transparent substrate layers, so that the blocking effect of the extraction electrodes on light or heat conduction can be reduced, the curing effect of the sealant layer is improved, meanwhile, the extraction electrodes can be more effectively ensured to have enough mechanical strength, and the use stability and reliability of the electrochromic device are improved.

Optionally, the first groove penetrates through the first non-transparent conductive layer and simultaneously penetrates at least one of the first transparent substrate layer and the third transparent substrate layer; alternatively, the second groove penetrates through the second non-transparent conductive layer and simultaneously penetrates at least one of the second transparent substrate layer and the fourth transparent substrate layer. Therefore, the grooves penetrate through the multilayer structure of the extraction electrode, the blocking effect of the extraction electrode on light or heat conduction in the curing process of the sealant layer can be reduced more effectively, and the curing effect of the sealant layer is improved.

Optionally, an shielding layer is provided at the edge of the first substrate and/or the second substrate, and the shielding layer at least partially shields the sealant layer. Therefore, the shielding layer is arranged, so that the sealant layer can be shielded, and the overall attractiveness of the electrochromic device is improved.

Optionally, the orthographic projection of the first substrate on the second substrate coincides with the second substrate, and the sealant layer is connected between the surface of the first substrate facing the second substrate and the surface of the second substrate facing the first substrate. Therefore, the orthographic projection of the first substrate on the second substrate is overlapped with the second substrate, so that the first substrate and the second substrate are aligned, the sealant layer is positioned between the first substrate and the second substrate, a good protection effect is achieved on the sealant layer, the situation that the sealant layer falls off and the like can be prevented more effectively, the overall attractiveness of the electrochromic device is higher, and the sealing process of the electrochromic device is simplified.

Optionally, the orthographic projection of the first substrate on the second substrate covers and exceeds the second substrate, one end of the sealant layer is connected to the surface of the first substrate facing the second substrate, and the other end of the sealant layer is connected to the surface of the second substrate facing the first substrate. Preferably, the orthographic projection of the first substrate on the second substrate covers and exceeds the second substrate, one end of the sealant layer is connected to the surface of the first substrate facing the second substrate, and the other end of the sealant layer is connected to the peripheral surface of the second substrate. More preferably, the orthographic projection of the first substrate on the second substrate covers and exceeds the second substrate, one end of the sealant layer is connected to the surface of the first substrate facing the second substrate, and the other end of the sealant layer is connected to the surface of the second substrate facing the first substrate and the outer peripheral surface of the second substrate. Under the condition, the front projection of the first substrate on the second substrate covers and exceeds the second substrate, so that the area of the first substrate is larger than that of the second substrate, the second substrate can be protected, shielding and the like of the second substrate can be realized more effectively, and the aesthetic degree of the electrochromic device is improved; further, by connecting the other end of the sealant layer to the outer peripheral surface of the second substrate, the shielding effect of the second substrate on the sealant layer can be further reduced, namely, the sealant layer is further exposed to light or heat in the process of photo-curing or thermosetting the sealant layer, so that the curing effect of the sealant layer is improved; furthermore, the other end of the sealant layer is connected to the surface of the second substrate facing the first substrate and the outer peripheral surface of the second substrate, so that the contact area between the sealant layer and the second substrate can be further increased, the stability of connection between the sealant layer and the second substrate is improved, the overall connection stability of the electrochromic device is improved, the use stability of the electrochromic device is improved, and the like.

Optionally, the first substrate and the second substrate are staggered, so that the orthographic projection of the first substrate on the second substrate is at least partially not overlapped with the second substrate, one end of one part of the sealant layer is connected to the surface of the first substrate facing the second substrate, the other end of the part of the sealant layer is connected to the surface of the second substrate facing the first substrate and/or the outer peripheral surface of the second substrate, one end of the other part of the sealant layer is connected to the surface of the second substrate facing the first substrate, and the other end of the other part of the sealant layer is connected to the surface of the first substrate facing the second substrate and/or the outer peripheral surface of the first substrate. Therefore, the application scene of the electrochromic device can be further improved and the applicability of the electrochromic device can be improved through the staggered arrangement of the first substrate and the second substrate.

Another aspect of the present application further provides a rearview mirror, including an electrochromic device as described above, wherein a reflective layer is disposed on the first substrate or the second substrate. Preferably, a reflective layer is disposed on a side of the first substrate facing the electrochromic film or on a side of the second substrate facing the electrochromic film. Therefore, the reflection layer is arranged, so that the reflection effect can be achieved on light, the rearview function of the rearview mirror of the vehicle is realized, and the anti-dazzling effect of the rearview mirror can be realized by utilizing the color change phenomenon of the electrochromic diaphragm; further, by providing the reflective layer on the side of the first substrate or the second substrate close to the electrochromic film, the reflective layer can be more effectively protected, the service life of the rearview mirror can be prolonged, and the like.

Optionally, the reflective layer has a hollowed-out area, and the hollowed-out area is at least partially overlapped with the projection of the sealant layer on the reflective layer. Therefore, when the side, far away from the electrochromic membrane, of the first substrate or the second substrate is viewed, the sealant layer is at least partially visible, namely the sealant layer is partially exposed, so that light or heat conduction can be irradiated through the hollowed-out area, and the curing effect of the sealant layer is improved.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 illustrates a schematic cross-sectional view of an electrochromic device in some embodiments of the present application;

FIG. 2 illustrates a second schematic cross-sectional view of an electrochromic device in some embodiments of the present application;

FIG. 3 illustrates a third schematic cross-sectional view of an electrochromic device in some embodiments of the present application;

FIG. 4 illustrates a top schematic view of an electrochromic device in some embodiments of the present application;

FIG. 5 illustrates a second schematic top view of an electrochromic device in some embodiments of the present application;

FIG. 6 illustrates a third schematic top view of an electrochromic device in some embodiments of the present application;

FIG. 7 (a) shows a schematic cross-sectional view of a first extraction electrode in some embodiments of the present application;

FIG. 7 (b) shows a schematic cross-sectional view of a second extraction electrode in some embodiments of the present application;

FIG. 8 illustrates a schematic cross-sectional view of an electrochromic film in some embodiments of the present application;

fig. 9 shows a schematic cross-sectional view of a rearview mirror in some embodiments of the present application.

Description of main reference numerals:

100-electrochromic devices; 110-a first substrate; 120-electrochromic film; 121-a first conductive base layer; 122-electrochromic interlayer; 1221-a layer of electrochromic material; 1222-an electrolyte layer; 1223-an ion storage layer; 123-a second conductive base layer; 130-a second substrate; 140, a sealant layer; 150-a first extraction electrode; 151-a first transparent substrate layer; 152-a first non-transparent conductive layer; 153-a third transparent substrate layer; 160-a second extraction electrode; 161-a second transparent substrate layer; 162-a second non-transparent conductive layer; 163-a fourth transparent substrate layer; 171-first groove; 172-a second groove; 181-a first bending part; 182-a second bend; 190-a barrier layer; 200-a reflective layer; 1000-rearview mirror.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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

Embodiments of the present application provide an electrochromic device 100 that is primarily applicable to a rearview mirror 1000. In some embodiments, as shown in fig. 1, the electrochromic device 100 may include a first substrate 110, an electrochromic film 120, and a second substrate 130, and a sealant layer 140, a first extraction electrode 150, and a second extraction electrode 160, which are sequentially stacked.

In some embodiments, as shown in fig. 8, the electrochromic film 120 may include a first conductive base layer 121, an electrochromic intermediate layer 122, and a second conductive base layer 123, which are sequentially stacked.

The material of the electrochromic interlayer 122 is not particularly limited, and may be solid, liquid, sol, or the like, for example. In some embodiments, as shown in fig. 8, electrochromic interlayer 122 may be a sequential stack of electrochromic material layer 1221, electrolyte layer 1222, and ion storage layer 1223. The types of materials of the electrochromic material layer 1221, the electrolyte layer 1222, and the ion storage layer 1223 are not particularly limited, and may be, for example, inorganic materials, organic materials, or the like, respectively. In other embodiments, the electrochromic interlayer 122 may also be Liquid Crystal (LC), polymer dispersed Liquid Crystal (Polymer Dispersed Liquid Crystal, PDLC), suspended particle device (Suspended Particle Device, SPD), or the like.

In some embodiments, the first conductive base layer 121 and the second conductive base layer 123 may be separate base layers having a conductive function, respectively. In other embodiments, the first and second conductive base layers 121 and 123 may be a multi-layered stacked structure, respectively, for example, a stacked structure of conductive layers and base layers. The conductive layer may be at least one of an electrodeless material conductive layer and an organic material conductive layer, and may include, for example, any one or a combination of at least two of Indium Tin Oxide (ITO), zinc aluminum Oxide (Aluminum Zinc Oxide, AZO), fluorine doped Tin Oxide (Fluorine doped Tin Oxide, FTO), silver nanowires, graphene, carbon nanotubes, metal mesh, and silver nanoparticles. The substrate layer may be a rigid substrate or a flexible substrate, for example, may be a glass substrate or a plastic substrate, etc., wherein the plastic substrate may include, but is not limited to, any one or a combination of at least two of polyethylene terephthalate (Polyethylene Terephthalate, PET), cyclic olefin copolymer, and cellulose triacetate. Therefore, different conductive basal layers, conductive layers or basal layers and the like can be arranged according to the requirements of practical application scenes, so that the applicability of the electrochromic device is improved.

In some embodiments, the sealant layer 140 may be located in a circumferential direction of the electrochromic film 120, and may form a receiving cavity together with the first substrate 110 and the second substrate 130, where the receiving cavity is adapted to receive the electrochromic film 120. The material of the sealant layer 140 is not particularly limited, and may be, for example, any one or a combination of at least two of a pressure-sensitive adhesive, a hot-melt adhesive, a UV photo-curable adhesive, a thermosetting adhesive, and a UV-heated dual-curable adhesive. Therefore, the periphery of the electrochromic membrane can be protected through the sealant layer, so that water, oxygen and the like can be prevented from entering the electrochromic membrane, the sealing performance of the electrochromic device is improved, and the service life, the service reliability and the like of the electrochromic device are improved.

In some embodiments, as shown in fig. 1, the orthographic projection of the first substrate 110 on the second substrate 130 may coincide with the second substrate 130. In some embodiments, the sealant layer 140 may be connected between a surface of the first substrate 110 facing the second substrate 130 and a surface of the second substrate 130 facing the first substrate 110. Therefore, the orthographic projection of the first substrate on the second substrate is overlapped with the second substrate, so that the first substrate and the second substrate are aligned, the sealant layer is positioned between the first substrate and the second substrate, a good protection effect is achieved on the sealant layer, the situation that the sealant layer falls off and the like can be prevented more effectively, the overall attractiveness of the electrochromic device is higher, and the sealing process of the electrochromic device is simplified.

In some embodiments, as shown in fig. 2, the first substrate 110 and the second substrate 130 may be staggered such that the orthographic projection of the first substrate 110 on the second substrate 130 is at least partially misaligned with the second substrate 130. In some embodiments, one end of the sealant layer 140 may be connected to a surface of the first substrate 110 facing the second substrate 130, and the other end of the sealant layer 140 may be connected to a surface of the second substrate 130 facing the first substrate 110. In other embodiments, one end of the sealant layer 140 may be connected to a surface of the first substrate 110 facing the second substrate 130 on a side of the first substrate 110 beyond the second substrate 130, the other end of the sealant layer 140 may be connected to an outer circumferential surface of the second substrate 130, one end of the sealant layer 140 may be connected to a surface of the second substrate 130 facing the first substrate 110 on a side of the second substrate 130 beyond the first substrate 110, and the other end of the sealant layer 140 may be connected to an outer circumferential surface of the first substrate 110. In still other embodiments, one end of the sealant layer 140 may be connected to a surface of the first substrate 110 facing the second substrate 130 on a side of the first substrate 110 beyond the second substrate 130, the other end of the sealant layer 140 may be connected to a surface of the second substrate 130 facing the first substrate 110 and an outer circumferential surface of the second substrate 130, one end of the sealant layer 140 may be connected to a surface of the second substrate 130 facing the first substrate 110 on a side of the second substrate 130 beyond the first substrate 110, and the other end of the sealant layer 140 may be connected to a surface of the first substrate 110 facing the second substrate 130 and an outer circumferential surface of the second substrate 130. Therefore, the sealant layer can be arranged at different positions according to the actual situation so as to be positioned at the circumference of the electrochromic diaphragm, and a good water and oxygen blocking protection effect is formed on the electrochromic diaphragm. Moreover, through the staggered arrangement of the first substrate and the second substrate, the sealant layer on the first substrate is not shielded by the second substrate, and/or the sealant layer on the second substrate is not shielded by the first substrate, so that direct conduction of light or heat is facilitated, the absorption of the sealant layer to light or heat is further improved, the curing degree of the sealant layer is improved, and the sealing effect of the sealant layer is further improved. Meanwhile, the defects of whether bubbles, through holes and the like exist in the sealant layer can be checked, the occurrence of a cavity between the electrochromic diaphragm and the sealant layer is avoided, and a good sealing effect is achieved.

In some embodiments, as shown in fig. 3, an orthographic projection of the first substrate 110 on the second substrate 130 may cover and exceed the second substrate 130. One end of the sealant layer 140 may be connected to a surface of the first substrate 110 facing the second substrate 130, and the other end of the sealant layer 140 may be connected to a surface of the second substrate 130 facing the first substrate 110. In some embodiments, the front projection of the first substrate 110 on the second substrate 130 may cover and exceed the second substrate 130, one end of the sealant layer 140 may be connected to the surface of the first substrate 110 facing the second substrate 130, and the other end of the sealant layer 140 may be connected to the outer circumferential surface of the second substrate 130. In other embodiments, the front projection of the first substrate 110 on the second substrate 130 may cover and exceed the second substrate 130, one end of the sealant layer 140 may be connected to the surface of the first substrate 110 facing the second substrate 130, and the other end of the sealant layer 140 may be connected to the surface of the second substrate 130 facing the first substrate 110 and the outer circumferential surface of the second substrate 130. Under the condition, the front projection of the first substrate on the second substrate covers and exceeds the second substrate, so that the area of the first substrate is larger than that of the second substrate, the second substrate can be protected, shielding and the like of the second substrate can be realized more effectively, and the aesthetic degree of the electrochromic device is improved; further, by connecting the other end of the sealant layer to the outer peripheral surface of the second substrate, the shielding effect of the second substrate on the sealant layer can be further reduced, namely, the sealant layer is further exposed to light or heat in the process of photo-curing or thermosetting the sealant layer, so that the curing effect of the sealant layer is improved; furthermore, the other end of the sealant layer is connected to the surface of the second substrate facing the first substrate and the outer peripheral surface of the second substrate, so that the contact area between the sealant layer and the second substrate can be further increased, the stability of connection between the sealant layer and the second substrate is improved, the overall connection stability of the electrochromic device is improved, the use stability of the electrochromic device is improved, and the like.

The first substrate 110 may be cover glass or back plate glass, and the second substrate 130 may be back plate glass or cover glass, respectively. Therefore, the front projection of the cover plate glass on the back plate glass can cover and exceed the back plate glass according to the requirements of actual application scenes, and the front projection of the back plate glass on the cover plate glass can also cover and exceed the cover plate glass so as to adapt to different application requirements and improve the applicability of electrochromic devices.

In some embodiments, as shown in fig. 3, an edge of the first substrate 110 may be provided with a shielding layer 190, the shielding layer 190 shielding at least part, e.g., part or all, of the sealant layer 140. In other embodiments, the edge of the second substrate 130 may be provided with a shielding layer 190, the shielding layer 190 shielding at least part, e.g., part or all, of the sealant layer 140. In still other embodiments, edges of the first substrate 110 and the second substrate 130 may also be provided with a shielding layer 190, the shielding layer 190 shielding at least part, e.g. part or all, of the sealant layer 140. Therefore, the shielding layer for shielding the sealant layer is arranged at the edge of the first substrate and/or the edge of the second substrate, so that shielding and decorating effects on structures such as the sealant layer are achieved, and the overall attractiveness of the electrochromic device is improved.

The material of the shielding layer 190 is not particularly limited. In some embodiments, the barrier layer 190 may be a chrome layer, such as a chrome ring. In other embodiments, the barrier layer 190 may be a steel layer, such as a steel ring. In still other embodiments, the shielding layer 190 may be another metal material layer. Therefore, different shielding material layers can be arranged according to the requirements of actual use scenes, and the applicability of the electrochromic device is improved.

In some embodiments, a portion of the first extraction electrode 150 may be disposed on the first conductive base layer 121, and another portion may be at least partially within the sealant layer 140. In some embodiments, as shown in fig. 4, a portion of the first extraction electrode 150 may be disposed on the first conductive base layer 121, and another portion may be located only partially within the sealant layer 140. In other embodiments, as shown in fig. 5, a portion of the first extraction electrode 150 may be disposed on the first conductive base layer 121, and another portion may be entirely within the sealant layer 140.

Similarly, in some embodiments, as shown in fig. 6, a portion of the second extraction electrode 160 may be disposed on the second conductive base layer 123, and another portion may be at least partially within the sealant layer 140, such as partially or entirely within the sealant layer 140.

Therefore, according to the requirements of different application scenes, the extraction electrode part which is not connected with the conductive basal layer is completely embedded in the sealant layer, so that the extraction electrode is well protected, and the sealing effect of the sealant layer on the electrochromic diaphragm is improved; alternatively, the portion of the extraction electrode not connected to the conductive substrate layer may be passed through the sealant layer so as to be partially exposed outside the sealant layer, so as to facilitate electrical connection between the external power lead and the extraction electrode.

The materials and structures of the first extraction electrode 150 and the second extraction electrode 160 are not particularly limited. In some embodiments, the first and

second extraction electrodes

150 and 160 may be flexible circuit boards (Flexible Printed Circuit, FPCs). In some embodiments, the first extraction electrode 150 and the second extraction electrode 160 may be rigid conductive clips or the like. Therefore, the extraction electrodes with different materials or structures can be arranged according to the requirements of actual conditions, so that the applicability of the electrochromic device is improved.

In some embodiments, as shown in fig. 4 or 5, a first groove 171 may be provided on the first extraction electrode 150, and the first groove 171 may be located on another portion of the first extraction electrode 150, that is, on a partial region of the first extraction electrode 150 that is not connected to the first conductive base layer 121. In other embodiments, as shown in fig. 6, a second groove 172 may be provided on the second extraction electrode 160, and the second groove 172 may be located on another portion of the second extraction electrode 160, that is, on a partial region of the second extraction electrode 160 that is not connected to the second conductive base layer 123.

Therefore, the grooves are formed in the other part of the extraction electrode, namely the part of the area which is not connected with the conductive substrate layer, and the relative position relationship between the grooves and the sealant layer can be adjusted, so that the sealant layer shielded by the extraction electrode is at least partially exposed through the grooves in different directions or angles, the shielding area of the extraction electrode to the sealant layer is reduced, the blocking effect of the extraction electrode on light or/and heat conduction in the curing process of the sealant layer is reduced, the curing effect of the sealant layer is improved, for example, the curing time of the sealant layer is shortened, the curing crosslinking degree of the sealant layer is enhanced, and the like, and the sealing performance of an electrochromic device is further improved.

In some embodiments, the first groove 171 or/and the second groove 172 may at least partially expose the sealant layer 140. The term "exposed" as used herein means that when light or/and heat is applied to the sealant layer 140, the light or/and heat may pass through the first groove 171 or/and the second groove 172 and directly act on the sealant layer 140. In some embodiments, the first groove 171 may reduce the area of the first extraction electrode 150 that is blocked from the sealant layer 140, or/and the second groove 172 may reduce the area of the second extraction electrode 160 that is blocked from the sealant layer 140. The reduction of the shielding area of the extraction electrode to the sealant layer means that when light or/and heat is applied to the sealant layer 140, the extraction electrode at least partially shields the light or/and heat from being conducted, and the light or/and heat can pass through the first groove 171 or/and the second groove 172 and directly act on the sealant layer 140 through the arrangement of the first groove 171 or/and the second groove 172, so that the heated area or/and the light receiving area of the sealant layer 140 is increased, that is, the shielding area of the extraction electrode to the sealant layer 140 is reduced. Therefore, the grooves are formed in the extraction electrode, so that the sealing adhesive layer is partially exposed, namely, the heated area or/and the light receiving area of the sealing adhesive layer are increased, the blocking effect of the extraction electrode on light or/and heat conduction is reduced, the curing effect of the sealing adhesive layer is improved, and the sealing performance of the electrochromic device is further improved.

In some embodiments, the first groove 171 may be located at least partially within the sealant layer 140, i.e., the first groove 171 may be located partially within the sealant layer 140 and partially outside the sealant layer 140; as shown in fig. 4 or 5, the first groove 171 may also be located entirely within the sealant layer 140. Similarly, in other embodiments, the second groove 172 may be located at least partially within the sealant layer 140, i.e., as shown in fig. 6, the second groove 172 may be located partially within the sealant layer 140 and partially outside the sealant layer 140; the second recess 172 may also be located entirely within the sealant layer 140. In this case, by providing the groove on at least one of the first extraction electrode and the second extraction electrode, and making the groove at least partially (e.g., partially or completely) located in the sealant layer, the projection of the groove on the first substrate or the second substrate may at least partially cover the projection of the sealant layer on the first substrate or the second substrate, so that in the process of exposing the sealant layer to light or heat, the blocking effect of the extraction electrode on the light or heat conduction may be reduced by the groove, and the curing effect of the sealant layer may be improved, e.g., the curing time of the sealant layer may be shortened or the curing crosslinking degree of the sealant layer may be enhanced.

In some embodiments, the first groove 171 may be at least partially outside the sealant layer 140, e.g., the first groove 171 may be entirely outside the sealant layer 140. In other embodiments, a portion of the first groove 171 may be located within the sealant layer 140 and another portion of the first groove 171 may be located outside the sealant layer 140. Similarly, in some embodiments, the second groove 172 may be at least partially located outside the sealant layer 140, e.g., the second groove 172 may be entirely located outside the sealant layer 140. In other embodiments, a portion of the second groove 172 may be located within the sealant layer 140 and another portion of the second groove 172 may be located outside the sealant layer 140. In this case, by providing the recess on at least one of the first extraction electrode and the second extraction electrode such that the recess is located at least partially outside the sealant layer, for example completely outside the sealant layer, or partially inside the sealant layer and partially outside the sealant layer, whereby the recess located inside the sealant layer, its projection onto the first substrate or the second substrate, may at least partially cover the projection of the sealant layer onto the first substrate or the second substrate; in addition, the groove positioned outside the sealant layer can be at least partially exposed out of the sealant layer when the extraction electrode is bent to shield the sealant layer, so that the blocking effect of the extraction electrode on light or heat conduction can be reduced through the groove in the process of light or heat curing of the sealant layer, the curing effect of the sealant layer can be improved, for example, the curing time of the sealant layer can be shortened, the curing crosslinking degree of the sealant layer can be enhanced, and the like.

In some embodiments, when the first groove 171 or/and the second groove 172 is at least partially within the sealant layer 140, the size of the first groove 171 or/and the second groove 172 is not greater than the size of the sealant layer 140 along the length of the first extraction electrode 150 or/and the second extraction electrode 160. In other embodiments, when the first groove 171 or/and the second groove 172 is at least partially located outside the sealant layer 140, the size of the first groove 171 or/and the second groove 172 is not greater than the size of the sealant layer 140 along the thickness direction of the first extraction electrode 150 or/and the second extraction electrode 160. Therefore, the sealing requirement of the electrochromic device can be met, the consistency of the sealing adhesive layer can be ensured, and the appearance attractiveness of the electrochromic device is improved.

In some embodiments, when the first groove 171 or/and the second groove 172 is at least partially within the sealant layer 140, the size of the first groove 171 or/and the second groove 172 is greater than the size of the sealant layer 140 along the length of the first extraction electrode 150 or/and the second extraction electrode 160. In other embodiments, when the first groove 171 or/and the second groove 172 is at least partially located outside the sealant layer 140, the size of the first groove 171 or/and the second groove 172 is larger than the size of the sealant layer 140 in the thickness direction of the first extraction electrode 150 or/and the second extraction electrode 160. Therefore, the area of the groove can be increased, the shielding area of the leading-out electrode to the sealant layer is further reduced, and the curing effect of the sealant layer is improved.

In some embodiments, the first extraction electrode 150 may have a first bent portion 181, wherein the first bent portion 181 may at least partially coincide with the first groove 171. In other embodiments, the second extraction electrode 160 may have a second bend 182, wherein the second bend 182 may at least partially coincide with the second groove 172. Therefore, the position of the bending part on the lead-out electrode can be set according to the actual situation requirement, so that the applicability of the electrochromic device is improved.

In some embodiments, as shown in fig. 4, the first groove 171 and the first bent portion 181 may be spaced apart along the length direction of the first extraction electrode 150. In other embodiments, as shown in fig. 6, the second groove 172 may be spaced apart from the second bending portion 182 along the length direction of the second extraction electrode 160. In general, the bending part of the extraction electrode receives certain bending stress, external extrusion acting force and the like, so that the requirement on the mechanical strength of the bending part is higher, and the mechanical strength of the extraction electrode is reduced due to the arrangement of the grooves; therefore, by arranging the space between the groove and the bending part, namely, the groove is not arranged at the bending part, the bending part of the extraction electrode can be ensured to have enough strength, the strength of the extraction electrode is improved, and the use stability and reliability of the electrochromic device are improved.

In some embodiments, the first groove 171 penetrates the first extraction electrode 150 in the thickness direction of the first extraction electrode 150, or the second groove 172 penetrates the second extraction electrode 160 in the thickness direction of the second extraction electrode 160. In other embodiments, the first groove 171 penetrates the first extraction electrode 150 in the thickness direction of the first extraction electrode 150, and the second groove 172 penetrates the second extraction electrode 160 in the thickness direction of the second extraction electrode 160. The term "penetrating" as used herein means that a groove penetrates from one end surface (for example, a top surface) of the extraction electrode to the other end surface (for example, a bottom surface) of the extraction electrode in the thickness direction of the extraction electrode, and a hollow groove in the thickness direction is formed in the extraction electrode. From this for the recess can expose the sealant layer at least partially, so that the exposure of sealant layer is more obvious, reduces the shielding effect of extraction electrode to the sealant layer more comprehensively and effectively, thereby promotes the solidification effect of sealant layer more comprehensively and effectively.

In addition, through making the recess run through the extraction electrode in the thickness direction of extraction electrode, even make the recess for running through the fretwork recess of extraction electrode completely, when recess part or when being located the sealant layer completely, the sealant layer of extraction electrode thickness direction both sides can also form the integral structure of connection through the recess to improve the connection stability of sealant layer, and promote the holistic sealed effect of electrochromic device.

In some embodiments, as shown in fig. 7 (a), the first extraction electrode 150 may include a first transparent substrate layer 151, a first non-transparent conductive layer 152, and a third transparent substrate layer 153, wherein the first non-transparent conductive layer 152 is located between the first transparent substrate layer 151 and the third transparent substrate layer 153, and the first groove 171 may penetrate at least the first non-transparent conductive layer 152, for example, only the first non-transparent conductive layer 152, or may penetrate at least one of the first transparent substrate layer 151 and the third transparent substrate layer 153 while penetrating the first non-transparent conductive layer 152.

In some embodiments, as shown in fig. 7 (b), the second extraction electrode 160 may include a second transparent substrate layer 161, a second non-transparent conductive layer 162, and a fourth transparent substrate layer 163, wherein the second non-transparent conductive layer 162 is located between the second transparent substrate layer 161 and the fourth transparent substrate layer 163, and the second groove 172 may penetrate at least the second non-transparent conductive layer 162, for example, only the second non-transparent conductive layer 162, or at least one of the second transparent substrate layer 161 and the fourth transparent substrate layer 163 while penetrating the second non-transparent conductive layer 162.

Therefore, the substrate layers of the extraction electrodes are made of transparent materials, the grooves at least penetrate through the non-transparent conductive layers, the blocking effect of the extraction electrodes on light or heat conduction can be reduced, the curing effect of the sealant layer is improved, meanwhile, the extraction electrodes can be effectively guaranteed to have enough mechanical strength, and the use stability and reliability of electrochromic devices are improved. Further, through the multilayer structure that makes the recess run through the extraction electrode, can reduce the effect of blocking of extraction electrode to light or heat conduction in the sealant layer curing process more effectively, promote the solidification effect of sealant layer.

In the embodiment of the present application, the number of the first grooves 171 and the second grooves 172 is not particularly limited, and may be, for example, one or more, or the like. In some embodiments, as shown in fig. 4, the number of first grooves 171 may be one; likewise, the number of the second grooves 172 may be one. In other embodiments, as shown in fig. 5, the number of first grooves 171 may be two; likewise, the number of the second grooves 172 may be two. In still other embodiments, the number of first grooves 171 may be three; likewise, as shown in fig. 6, the number of the second grooves 172 may be three. In this case, on the one hand, the shielding area of the extraction electrode to the sealant layer can be further reduced by increasing the number of grooves; on the other hand, by increasing the number of the grooves instead of directly increasing the area of the grooves, the structural stability of the extraction electrode can be ensured under the condition of reducing the shielding area of the extraction electrode to the sealant layer, for example, the fracture possibility of the extraction electrode is reduced, so that the use stability and reliability of the electrochromic device are improved.

In some embodiments, two or more first grooves 171 may be disposed at intervals in the width direction of the first extraction electrode 150, or two or more second grooves 172 may be disposed at intervals in the width direction of the second extraction electrode 160. In other embodiments, two or more first grooves 171 are disposed at intervals in the width direction of the first extraction electrode 150, and two or more second grooves 172 are disposed at intervals in the width direction of the second extraction electrode 160. Therefore, the area of the groove can be increased, the extraction electrode can be ensured to have enough mechanical strength, the curing effect of the sealant layer can be improved, the service life of the extraction electrode can be prolonged, and the like.

In some embodiments, more than two first grooves 171 may be spaced apart along any direction of the first extraction electrode 150, for example, may be spaced apart along the length of the first extraction electrode 150; alternatively, two or more second grooves 172 may be provided at intervals along any direction of the second extraction electrode 160, for example, may be provided at intervals along the length direction of the second extraction electrode 160. In other embodiments, more than two first grooves 171 may be disposed at intervals along any direction of the first extraction electrode 150, for example, may be disposed at intervals along the length direction of the first extraction electrode 150; further, two or more second grooves 172 may be provided at intervals in any direction of the second extraction electrode 160, for example, may be provided at intervals in the longitudinal direction of the second extraction electrode 160. From this, can be according to actual conditions's demand, arrange the arbitrary direction of leading-out electrode with more than two recesses, for example length direction to reach the effect that reduces the shielding area of leading-out electrode to the seal glue film, promote the solidification effect of seal glue film, thereby promote electrochromic device's sealing performance.

In the embodiment of the present application, the size of the first extraction electrode 150 is W1 and the size of the first groove 171 is W3 in the width direction of the first extraction electrode 150, wherein the relationship between W1 and W3 is not particularly limited. In some embodiments, the following relationship is satisfied between W1 and W3: W3/W1 is less than 1. In other embodiments, W1 and W3 satisfy the following relationship: W3/W1 is more than or equal to 0.01 and less than 1. In still other embodiments, W1 and W3 satisfy the following relationship: W3/W1 is more than or equal to 0.05 and less than 1. In still other embodiments, W1 and W3 satisfy the following relationship: W3/W1 is less than or equal to 0.8. In still other embodiments, W1 and W3 satisfy the following relationship: W3/W1 is less than or equal to 0.6. In other embodiments, W1 and W3 satisfy the following relationship: W3/W1 is more than or equal to 0.06 and less than or equal to 0.3.

In the embodiment of the present application, the size of the second extraction electrode 160 is W2 and the size of the second groove 172 is W4 in the width direction of the second extraction electrode 160, wherein the relationship between W2 and W4 is not particularly limited. In some embodiments, the following relationship is satisfied between W2 and W4: W4/W2 < 1. In other embodiments, W2 and W4 satisfy the following relationship: W4/W2 is more than or equal to 0.01 and less than 1. In still other embodiments, W2 and W4 satisfy the following relationship: W4/W2 is more than or equal to 0.05 and less than 1. In still other embodiments, W2 and W4 satisfy the following relationship: W4/W2 is less than or equal to 0.8. In still other embodiments, W2 and W4 satisfy the following relationship: W4/W2 is less than or equal to 0.6. In other embodiments, W2 and W4 satisfy the following relationship: W4/W2 is more than or equal to 0.06 and less than or equal to 0.3.

In general, when the width of the groove is too large, although the area of the exposed sealant layer can be increased, the curing effect of the sealant layer is improved, the strength of the extraction electrode is low, for example, breakage and the like are easy to occur, and the use stability of the electrochromic device is affected; when the groove width is too small, the extraction electrode can maintain certain strength, such as difficult to break, but the area of the exposed sealant layer is reduced, so that the curing effect of the sealant layer is not improved. Therefore, the width of the groove is controlled within a certain range, the strength of the extraction electrode can be ensured, the extraction electrode is prevented from being broken, the shielding area of the extraction electrode to the sealant layer can be reduced, and the curing effect of the sealant layer is improved.

In the embodiment of the present application, the interval between two or more first grooves 171 is W5, wherein the relationship between W1 and W5 is not particularly limited. In some embodiments, W1 and W5 satisfy the following relationship: W5/W1 < 1. In other embodiments, W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.01 and less than 1. In still other embodiments, W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.05 and less than 1. In still other embodiments, W1 and W5 satisfy the following relationship: W5/W1 is less than or equal to 0.5. In still other embodiments, W1 and W5 satisfy the following relationship: W5/W1 is less than or equal to 0.1. In other embodiments, W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.06 and less than or equal to 0.08.

In the embodiment of the present application, the interval between the two or more second grooves 172 is W6, wherein the relationship between W2 and W6 is not particularly limited. In some embodiments, the following relationship is satisfied between W2 and W6: W6/W2 < 1. In other embodiments, W2 and W6 satisfy the following relationship: W6/W2 is more than or equal to 0.01 and less than 1. In still other embodiments, W2 and W6 satisfy the following relationship: W6/W2 is more than or equal to 0.05 and less than 1. In still other embodiments, W2 and W6 satisfy the following relationship: W6/W2 is less than or equal to 0.5. In still other embodiments, W2 and W6 satisfy the following relationship: W6/W2 is less than or equal to 0.1. In other embodiments, W2 and W6 satisfy the following relationship: W6/W2 is more than or equal to 0.06 and less than or equal to 0.08.

In general, when the width of the grooves is too large or/and the interval between the grooves is too small, although the area of the exposed sealant layer can be increased, the curing effect of the sealant layer is improved, the strength of the extraction electrode is low, for example, breakage is easy to occur, and the use stability of the electrochromic device is affected; when the width of the grooves is too small or/and the distance between the grooves is too large, the extraction electrode can keep certain strength, such as difficult to break, but the area of the exposed sealant layer is reduced, so that the curing effect of the sealant layer is not improved. Therefore, the width or/and the interval of the grooves are controlled within a certain range, the strength of the extraction electrode can be ensured, the extraction electrode is prevented from being broken, the shielding area of the extraction electrode to the sealant layer can be reduced, and the curing effect of the sealant layer is improved.

The embodiment of the present application further provides a rearview mirror 1000, including the electrochromic device 100 described in the above embodiment, where the first substrate 110 or the second substrate 130 may be provided with the reflective layer 200. In some embodiments, a side of the first substrate 110 facing the electrochromic film 120 may be provided with a reflective layer 200. In other embodiments, as shown in fig. 9, a side of the second substrate 130 facing the electrochromic film 120 may be provided with a reflective layer 200. Therefore, the reflection layer is arranged, so that the reflection effect can be achieved on light, the rearview function of the rearview mirror of the vehicle is realized, and the anti-dazzling effect of the rearview mirror can be realized by utilizing the color change phenomenon of the electrochromic diaphragm; further, by providing the reflective layer on the side of the first substrate or the second substrate close to the electrochromic film, the reflective layer can be more effectively protected, the service life of the rearview mirror can be prolonged, and the like.

In some embodiments, the reflective layer 200 may have a hollowed-out area, and the hollowed-out area may at least partially coincide with a projection of the sealant layer 140 on the first substrate 110 or the second substrate 130. In some embodiments, the hollowed-out area may be hollowed-out inside the reflective layer 200, that is, the hollowed-out area may make the reflective layer 200 form a break point at any position in the middle. In other embodiments, the hollowed-out region may be disposed at the edge of the reflective layer 200, i.e., the edge of the reflective layer is removed (the reflective layer is narrowed, etc.) by the hollowed-out region. From this, through the setting of fretwork region, can make when looking from the one side of keeping away from electrochromic diaphragm of first base plate or second base plate, make the sealant layer at least partly visible, make the sealant layer locally expose to can shine light or conduction heat through this fretwork region, in order to promote the solidification effect of sealant layer.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values. Moreover, the features of the different embodiments may be combined or adjusted appropriately according to the requirements of the technical solution.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims

1. An electrochromic device comprising:

the electrochromic display device comprises a first substrate, an electrochromic film and a second substrate which are sequentially stacked, wherein the electrochromic film comprises a first conductive base layer, an electrochromic middle layer and a second conductive base layer which are sequentially stacked;

the sealant layer is positioned on the circumference of the electrochromic membrane, and forms a containing cavity together with the first substrate and the second substrate, and the containing cavity is suitable for containing the electrochromic membrane;

a first extraction electrode, a portion of which is disposed on the first conductive substrate layer, and another portion of which is at least partially within the sealant layer;

A second extraction electrode, a portion of which is disposed on the second conductive substrate layer, and another portion of which is at least partially located within the sealant layer;

wherein, a first groove is arranged on the other part of the first extraction electrode, or/and a second groove is arranged on the other part of the second extraction electrode.

2. Electrochromic device according to claim 1, characterized in that the first recess is at least partially located in the encapsulant layer or/and the second recess is at least partially located in the encapsulant layer.

3. Electrochromic device according to claim 1, characterized in that the first recess is located at least partially outside the encapsulation layer or/and the second recess is located at least partially outside the encapsulation layer.

4. The electrochromic device according to claim 1, wherein said first recess penetrates said first extraction electrode in a thickness direction of said first extraction electrode;

or/and the second groove penetrates through the second extraction electrode along the thickness direction of the second extraction electrode.

5. The electrochromic device according to claim 1, wherein the first extraction electrode has a dimension W1 and the first recess has a dimension W3 along the width direction of the first extraction electrode, wherein W1 and W3 satisfy the following relation: W3/W1 is more than or equal to 0.06 and less than or equal to 0.3;

Or/and, along the width direction of the second extraction electrode, the size of the second extraction electrode is W2, and the size of the second groove is W4, wherein W2 and W4 satisfy the following relation: W4/W2 is more than or equal to 0.06 and less than or equal to 0.3.

6. The electrochromic device according to claim 5, wherein the first grooves or/and the second grooves are two or more, wherein,

the two or more first grooves are arranged at intervals along the width direction of the first extraction electrode, or/and the two or more second grooves are arranged at intervals along the width direction of the second extraction electrode.

7. The electrochromic device according to claim 6, wherein the spacing between two or more of said first grooves is W5, wherein W1 and W5 satisfy the following relationship: W5/W1 is more than or equal to 0.06 and less than or equal to 0.08;

or/and, the interval between the two or more second grooves is W6, wherein W2 and W6 satisfy the following relation: W6/W2 is more than or equal to 0.06 and less than or equal to 0.08.

8. The electrochromic device according to claim 1, wherein the first extraction electrode has a first bent portion, the first groove being spaced apart from the first bent portion along a length direction of the first extraction electrode;

Or/and the second extraction electrode is provided with a second bending part, and the second groove and the second bending part are arranged at intervals along the length direction of the second extraction electrode.

9. The electrochromic device according to claim 1, wherein said first extraction electrode comprises a first transparent substrate layer, a first non-transparent conductive layer and a third transparent substrate layer, said first non-transparent conductive layer being located between said first transparent substrate layer and said third transparent substrate layer, said first recess extending at least through said first non-transparent conductive layer;

or/and, the second extraction electrode comprises a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, the second non-transparent conductive layer is positioned between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates through the second non-transparent conductive layer.

10. The electrochromic device according to claim 1, wherein the orthographic projection of the first substrate onto the second substrate coincides with the second substrate, the sealant layer being connected between a surface of the first substrate facing the second substrate and a surface of the second substrate facing the first substrate;

Or, the orthographic projection of the first substrate on the second substrate covers and exceeds the second substrate, one end of the sealant layer is connected to the surface of the first substrate facing the second substrate, and the other end of the sealant layer is connected to the surface of the second substrate facing the first substrate and/or the outer peripheral surface of the second substrate;

or the first substrate and the second substrate are staggered, so that the orthographic projection of the first substrate on the second substrate is at least partially not overlapped with the second substrate, one end of one part of the sealant layer is connected to the surface of the first substrate facing the second substrate, the other end of the part of the sealant layer is connected to the surface of the second substrate facing the first substrate and/or the peripheral surface of the second substrate, one end of the other part of the sealant layer is connected to the surface of the second substrate facing the first substrate, and the other end of the other part of the sealant layer is connected to the surface of the first substrate facing the second substrate and/or the peripheral surface of the first substrate.

11. A rear view mirror comprising an electrochromic device according to any one of claims 1 to 10, wherein the first substrate or the second substrate is provided with a reflective layer.

12. The rearview mirror according to claim 11, wherein the reflective layer has a hollowed-out area, and the hollowed-out area is at least partially coincident with a projection of the sealant layer on the reflective layer.