Electrochromic device and rearview mirror

Abstract

The present application provides an electrochromic device and a rearview mirror, comprising: a first substrate, an electrochromic film, and a second substrate, wherein the electrochromic film comprises a first conductive substrate layer, an electrochromic intermediate layer, and a second conductive substrate layer; a sealant layer, which is located in the circumference of the electrochromic film and is enclosed together with the first substrate and the second substrate to form a receiving cavity, and the receiving cavity is suitable for accommodating the electrochromic film; a first lead-out electrode, a part of which is arranged on the first conductive substrate layer, and another part of which is at least partially located in the sealant layer; a second lead-out electrode, a part of which is arranged on the second conductive substrate layer, and another part of which is at least partially located in the sealant layer; wherein a first groove is arranged on another part of the first lead-out electrode, or / and a second groove is arranged on another part of the second lead-out electrode. The electrochromic device provided by the present application improves the curing effect of the sealant layer.

Description

Technical Field

[0001] The present application relates to the field of electro-optical technology, and in particular to an electrochromic device and a rearview mirror. Background Art

[0002] Electrochromism refers to the phenomenon that the optical properties of a material undergo a stable and reversible color change under the action of an external electric field, which is manifested in the reversible change of color and transparency. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices. With the advancement of science and technology and people's increasing requirements for living comfort, electrochromic devices have received more and more attention in the fields of consumer electronics, transportation, construction and military.

[0003] Taking the application of electrochromic devices in automobile rearview mirrors as an example, when driving, the driver needs to observe the rearview mirror to understand the driving conditions of the vehicle behind him. When there is strong light shining on the rearview mirror from behind the vehicle, the rearview mirror will glare, making it difficult for the driver to clearly see the vehicle behind him, which poses a great safety hazard. For this reason, more and more rearview mirrors now use electrochromic technology, attaching electrochromic devices to the rearview mirrors, and through the color changing function of the electrochromic devices, the rearview mirrors have an anti-glare function, which is of great significance for safe driving.

[0004] However, electrochromic devices have high requirements for sealing performance, and usually require a sealant layer to be set around them to prevent the electrochromic device from contacting with moisture and oxygen in the air, which would affect its color-changing performance. In the prior art, a rearview mirror usually includes an upper and lower substrate, and an electrochromic device arranged between the two substrates. Therefore, the sealant layer is usually arranged between the upper and lower substrates, and the electrochromic device is electrically connected to an external power source through a lead-out electrode. However, the sealant layer usually requires post-processing and curing, such as heat curing or light curing. In the presence of the lead-out electrode, the sealant layer will be shielded to a certain extent, thereby affecting the sealant layer's absorption of light or heat, resulting in insufficient curing of the sealant layer, affecting its sealing effect. Summary of the invention

[0005] In view of this, in order to overcome the deficiencies in the prior art, the present application provides an electrochromic device and a rearview mirror to solve technical problems such as incomplete curing of the sealant layer in the prior art.

[0006] One aspect of the present application provides an electrochromic device, comprising: a first substrate, an electrochromic film, and a second substrate stacked in sequence, wherein the electrochromic film comprises a first conductive base layer, an electrochromic intermediate layer, and a second conductive base layer stacked in sequence; a sealant layer, wherein the sealant layer is located in the circumference of the electrochromic film and together with the first substrate and the second substrate form a receiving cavity, wherein the receiving cavity is suitable for accommodating the electrochromic film; a first lead-out electrode, wherein a portion of the first lead-out electrode is disposed on the first conductive base layer, and another portion of the first lead-out electrode is at least partially located in the sealant layer; a second lead-out electrode, wherein a portion of the second lead-out electrode is disposed on the second conductive base layer, and another portion of the second lead-out electrode is at least partially located in the sealant layer; wherein a first groove is disposed on another portion of the first lead-out electrode, or / and a second groove is disposed on another portion of the second lead-out electrode.

[0007] Preferably, the first groove or / and the second groove at least partially expose the sealant layer. More preferably, the first groove reduces the shielding area of ​​the sealant layer by the first lead-out electrode, or / and the second groove reduces the shielding area of ​​the sealant layer by the second lead-out electrode. In this case, by making at least part of another part of the lead-out electrode disposed in the sealant layer, and disposing the groove on another part of the lead-out electrode, the relative position relationship between the groove and the sealant layer can be adjusted according to the actual needs, so that in different directions or angles, the sealant layer shielded by the lead-out electrode is at least partially exposed through the groove, and the shielding area of ​​the sealant layer by the lead-out electrode is reduced, thereby reducing the blocking effect of the lead-out electrode on light and / or heat conduction during the curing process of the sealant layer, and improving the curing effect of the sealant layer, such as shortening the curing time of the sealant layer and / or enhancing the degree of curing and cross-linking of the sealant layer, thereby improving the sealing performance of the electrochromic device.

[0008] 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 portion of the first groove or the second groove is located in the sealant layer, and another portion of the first groove or the second groove is located outside the sealant layer. More preferably, the first groove is completely located in the sealant layer, or / and the second groove is completely located in 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 (for example, partially or completely) located in the sealant layer, the projection of the groove located inside the sealant layer on the first substrate or the second substrate can at least partially cover the projection of the sealant layer on the first substrate or the second substrate; in addition, the groove located outside the sealant layer can at least partially expose the sealant layer through the groove when the extraction electrode is bent and blocks the sealant layer, so that in the process of light or heat curing of the sealant layer, the blocking effect of the extraction electrode on light or heat conduction can be reduced through the groove, thereby improving the curing effect of the sealant layer, such as shortening the curing time of the sealant layer or enhancing the curing crosslinking degree of the sealant layer.

[0009] 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 completely outside the sealant layer, or / and the second groove is completely outside the sealant layer. More preferably, a portion of the first groove or the second groove is located inside the sealant layer, and another portion of the first groove or the second groove is located outside the sealant layer. In this case, a groove is provided on at least one of the first lead-out electrode and the second lead-out electrode, and the groove is at least partially located outside the sealant layer, for example, completely outside the sealant layer, or partially located inside the sealant layer and the other partially located outside the sealant layer. Thus, the projection of the groove inside the sealant layer on the first substrate or the second substrate can at least partially cover the projection of the sealant layer on the first substrate or the second substrate. In addition, when the lead-out electrode is bent and blocks the sealant layer, the sealant layer can be at least partially exposed through the groove by the groove. Therefore, in the process of curing the sealant layer by light or heat, the blocking effect of the lead-out electrode on light or heat conduction can be reduced through the groove, thereby improving the curing effect of the sealant layer, for example, shortening the curing time of the sealant layer or enhancing the degree of curing and cross-linking of the sealant layer.

[0010] Optionally, the first groove penetrates the first lead-out electrode along the thickness direction of the first lead-out electrode, or the second groove penetrates the second lead-out electrode along the thickness direction of the second lead-out electrode. Preferably, the first groove penetrates the first lead-out electrode along the thickness direction of the first lead-out electrode, and the second groove penetrates the second lead-out electrode along the thickness direction of the second lead-out electrode. That is, in the thickness direction of the lead-out electrode, the groove can be a hollow groove that completely penetrates the lead-out electrode to at least partially expose the sealant layer. The setting of the hollow groove can make the exposure of the sealant layer more obvious, and more comprehensively and effectively reduce the shielding effect of the lead-out electrode on the sealant layer, thereby more comprehensively and effectively improving the curing effect of the sealant layer.

[0011] In addition, by making the groove penetrate the lead-out electrode in the thickness direction of the lead-out electrode, that is, making the groove a hollow groove that completely penetrates the lead-out electrode, when the groove is partially or completely located in the sealant layer, the sealant layer located in the thickness direction of the lead-out electrode can also form an integrated structure connected by the groove, so as to improve the connection stability of the sealant layer and enhance the overall sealing effect of the electrochromic device.

[0012] Optionally, there are more than two first grooves or the second grooves. Preferably, there are more than two first grooves and the second grooves. In this case, on the one hand, the shielding area of ​​the lead-out electrode to the sealant layer can be further reduced by increasing the number of grooves; on the other hand, by increasing the number of grooves instead of directly increasing the area of ​​the grooves, the structural stability of the lead-out electrode can be ensured while reducing the shielding area of ​​the lead-out electrode to the sealant layer, such as reducing the possibility of breakage of the lead-out electrode, thereby improving the use stability and reliability of the electrochromic device.

[0013] Optionally, two or more first grooves are arranged at intervals along the width direction of the first extraction electrode, or two or more second grooves are arranged at intervals along the width direction of the second extraction electrode. Preferably, two or more first grooves are arranged at intervals along the width direction of the first extraction electrode, and two or more second grooves are arranged at intervals along the width direction of the second extraction electrode. Thus, the extraction electrode can be ensured to have sufficient mechanical strength while increasing the groove area.

[0014] Optionally, along the width direction of the first lead-out electrode, the size of the first lead-out electrode is W1, and the size of the first groove is W3, wherein W1 and W3 satisfy the following relationship: 0.06≤W3 / W1≤0.3, or, along the width direction of the second lead-out electrode, the size of the second lead-out electrode is W2, and the size of the second groove is W4, wherein W2 and W4 satisfy the following relationship: 0.06≤W4 / W2≤0.3. Preferably, along the width direction of the first lead-out electrode, the size of the first lead-out electrode is W1, and the size of the first groove is W3, wherein W1 and W3 satisfy the following relationship: 0.06≤W3 / W1≤0.3, and, along the width direction of the second lead-out electrode, the size of the second lead-out electrode is W2, and the size of the second groove is W4, wherein W2 and W4 satisfy the following relationship: 0.06≤W4 / W2≤0.3. Generally speaking, when the groove width is too large, although the area of ​​the exposed sealant layer can be increased, which is beneficial to improving the curing effect of the sealant layer, the strength of the lead electrode will be low, such as being prone to breakage, etc., affecting the stability of the electrochromic device; when the groove width is too small, although the lead electrode can maintain a certain strength, such as being less likely to break, etc., it will also reduce the area of ​​the exposed sealant layer, which is not conducive to improving the curing effect of the sealant layer. Therefore, controlling the width of the groove within a certain range can not only ensure the strength of the lead electrode and prevent it from breaking, but also reduce the area of ​​the lead electrode blocking the sealant layer and improve the curing effect of the sealant layer.

[0015] Optionally, the spacing between two or more first grooves is W5, wherein W1 and W5 satisfy the following relationship: 0.06≤W5 / W1≤0.08; or, the spacing between two or more second grooves is W6, wherein W2 and W6 satisfy the following relationship: 0.06≤W6 / W2≤0.08. Preferably, the spacing between two or more first grooves is W5, wherein W1 and W5 satisfy the following relationship: 0.06≤W5 / W1≤0.08; and, the spacing between two or more second grooves is W6, wherein W2 and W6 satisfy the following relationship: 0.06≤W6 / W2≤0.08. In general, when the groove width is too large or / and the spacing between the grooves is too small, although the area of ​​the exposed sealant layer can be increased, which is beneficial to improving the curing effect of the sealant layer, the strength of the lead-out electrode will be low, such as being prone to breakage, etc., affecting the stability of the electrochromic device; when the groove width is too small or / and the spacing between the grooves is too large, although the lead-out electrode can maintain a certain strength, such as being not prone to breakage, etc., it will also reduce the area of ​​the exposed sealant layer, which is not conducive to improving the curing effect of the sealant layer. Therefore, controlling the groove width and / or spacing within a certain range can not only ensure the strength of the lead-out electrode and prevent it from breaking, but also reduce the area of ​​the lead-out electrode blocking the sealant layer and improve the curing effect of the sealant layer.

[0016] Optionally, the first extraction electrode has a first bending portion, and the first groove and the first bending portion are spaced apart 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 apart along the length direction of the second extraction electrode. Preferably, the first extraction electrode has a first bending portion, and 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. Under normal circumstances, the bending portion of the extraction electrode will be subject to certain bending stress and external extrusion force, etc., so the mechanical strength of the bending portion is required to be high, and the setting of the groove will reduce the mechanical strength of the extraction electrode; therefore, by setting a spacing between the groove and the bending portion, that is, the groove position is not set at the bending portion, it can ensure that the bending portion of the extraction electrode has sufficient strength, improve the strength of the extraction electrode, and thus improve the stability and reliability of the electrochromic device.

[0017] 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 the first non-transparent conductive layer; or, the second extraction electrode includes a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, the second non-transparent conductive layer is located between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates the second non-transparent conductive layer. Preferably, 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 the first non-transparent conductive layer; and the second extraction electrode includes a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, the second non-transparent conductive layer is located between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates the second non-transparent conductive layer. Therefore, by setting the substrate layers of the lead-out electrodes to be made of transparent materials and making the grooves at least penetrate the non-transparent conductive layer, for example, only penetrate the non-transparent conductive layer but not the first transparent substrate layer or the second transparent substrate layer, the blocking effect of the lead-out electrode on light or heat conduction can be reduced, and the curing effect of the sealant layer can be improved. At the same time, it can also more effectively ensure that the lead-out electrode has sufficient mechanical strength, thereby improving the stability and reliability of the electrochromic device.

[0018] Optionally, the first groove penetrates the first non-transparent conductive layer and penetrates at least one of the first transparent substrate layer and the third transparent substrate layer; or the second groove penetrates the second non-transparent conductive layer and penetrates at least one of the second transparent substrate layer and the fourth transparent substrate layer. Thus, by making the groove penetrate the multi-layer structure of the extraction electrode, the blocking effect of the extraction electrode on light or heat conduction during the curing process of the sealant layer can be more effectively reduced, thereby improving the curing effect of the sealant layer.

[0019] Optionally, a 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. Thus, by providing the shielding layer, the sealant layer can be shielded, thereby improving the overall aesthetics of the electrochromic device.

[0020] Optionally, the orthographic projection of the first substrate on the second substrate overlaps 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. Thus, by coinciding the orthographic projection of the first substrate on the second substrate with the second substrate, the first substrate and the second substrate can be aligned so that the sealant layer is located between the first substrate and the second substrate, which plays a good protective role on the sealant layer, can more effectively prevent the sealant layer from falling off, etc., and can make the overall aesthetics of the electrochromic device higher and simplify the sealing process of the electrochromic device.

[0021] 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 outer 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. In this case, by making the orthographic projection of the first substrate on the second substrate cover and exceed the second substrate, the area of ​​the first substrate is made larger than the second substrate, which can protect the second substrate and more effectively shield the second substrate, thereby improving the aesthetics of the electrochromic device; 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, that is, during the light or heat curing of the sealant layer, the sealant layer is further exposed to light or heat, thereby improving the curing effect of the sealant layer; further, by connecting the other end of the sealant layer to the surface of the second substrate facing the first substrate and the outer peripheral surface of the second substrate, the contact area of ​​the sealant layer and the second substrate can be further increased, and the stability of the connection between the sealant layer and the second substrate can be improved, thereby improving the overall connection stability of the electrochromic device and improving the use stability of the electrochromic device.

[0022] Optionally, the first substrate and the second substrate are staggered so that the orthographic projection of the first substrate on the second substrate does not overlap at least partially with the second substrate, one end of a portion of the sealant layer is connected to the surface of the first substrate facing the second substrate, the other end of a portion 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 another portion of the sealant layer is connected to the surface of the second substrate facing the first substrate, and the other end of another portion 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. Thus, by staggering the first substrate and the second substrate, the application scenarios of the electrochromic device can be further improved and its applicability can be improved.

[0023] Another aspect of the present application also provides a rearview mirror, comprising the electrochromic device as described above, wherein a reflective layer is provided on the first substrate or the second substrate. Preferably, a reflective layer is provided on the side of the first substrate facing the electrochromic film or the side of the second substrate facing the electrochromic film. Thus, by providing the reflective layer, a reflection effect can be achieved on light, thereby realizing the rearview function of the vehicle rearview mirror, and the anti-glare effect of the rearview mirror can be achieved by utilizing the color change phenomenon of the electrochromic film; further, by providing the reflective layer on the side of the first substrate or the second substrate close to the electrochromic film, a more effective protection effect can be formed on the reflective layer, thereby extending the service life of the rearview mirror, etc.

[0024] Optionally, the reflective layer has a hollow area, and the hollow area at least partially overlaps with the projection of the sealant layer on the reflective layer. Thus, when viewed from the side of the first substrate or the second substrate away from the electrochromic film, the sealant layer can be at least partially visible, that is, the sealant layer is partially exposed, so that light can be irradiated or heat can be conducted through the hollow area to improve the curing effect of the sealant layer.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The cross-sectional view of the electrochromic device in some embodiments of the present application is shown. Figure 1 ;

[0028] Figure 2 The cross-sectional view of the electrochromic device in some embodiments of the present application is shown. Figure 2 ;

[0029] Figure 3 The cross-sectional view of the electrochromic device in some embodiments of the present application is shown. Figure 3 ;

[0030] Figure 4 A schematic top view of an electrochromic device in some embodiments of the present application is shown. Figure 1 ;

[0031] Figure 5 A schematic top view of an electrochromic device in some embodiments of the present application is shown. Figure 2 ;

[0032] Figure 6 A schematic top view of an electrochromic device in some embodiments of the present application is shown. Figure 3 ;

[0033] FIG. 7( a ) shows a cross-sectional schematic diagram of a first extraction electrode in some embodiments of the present application;

[0034] FIG. 7( b ) shows a cross-sectional schematic diagram of a second extraction electrode in some embodiments of the present application;

[0035] Figure 8 A schematic cross-sectional view of an electrochromic film in some embodiments of the present application is shown;

[0036] Fig. 9 A schematic cross-sectional view of a rearview mirror in some embodiments of the present application is shown.

[0037] Description of main component symbols:

[0038] 100-electrochromic device; 110-first substrate; 120-electrochromic film; 121-first conductive substrate layer; 122-electrochromic intermediate layer; 1221-electrochromic material layer; 1222-electrolyte layer; 1223-ion storage layer; 123-second conductive substrate layer; 130-second substrate; 140-sealant layer; 150-first lead electrode; 151-first transparent substrate layer; 152-first non-transparent conductive layer; 153-third transparent substrate layer; 160-second lead electrode; 161-second transparent substrate layer; 162-second non-transparent conductive layer; 163-fourth transparent substrate layer; 171-first groove; 172-second groove; 181-first bending portion; 182-second bending portion; 190-shielding layer; 200-reflective layer; 1000-rearview mirror. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0041] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] The embodiment of the present application provides an electrochromic device 100, which is mainly used in a rearview mirror 1000. In some embodiments, Figure 1 As shown, the electrochromic device 100 may include a first substrate 110 , an electrochromic film 120 , and a second substrate 130 , which are sequentially stacked, as well as a sealant layer 140 , a first extraction electrode 150 , and a second extraction electrode 160 .

[0045] In some embodiments, Figure 8 As shown, 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 stacked in sequence.

[0046] The material of the electrochromic intermediate layer 122 is not particularly limited, and may be, for example, solid, liquid, or sol. Figure 8 As shown, the electrochromic intermediate layer 122 may be a stack of an electrochromic material layer 1221, an electrolyte layer 1222, and an ion storage layer 1223. The material types of the electrochromic material layer 1221, the electrolyte layer 1222, and the ion storage layer 1223 are not particularly limited, and may be inorganic materials, organic materials, etc., respectively. In other embodiments, the electrochromic intermediate layer 122 may also be a liquid crystal (LC), a polymer dispersed liquid crystal (PDLC), a suspended particle device (SPD), etc.

[0047] In some embodiments, the first conductive substrate layer 121 and the second conductive substrate layer 123 may be a single substrate layer with a conductive function. In other embodiments, the first conductive substrate layer 121 and the second conductive substrate layer 123 may be a multi-layer stacked structure, for example, a stacked structure of a conductive layer and a substrate layer. Among them, the conductive layer may be at least one of an apolar material conductive layer and an organic material conductive layer, for example, it may include but is not limited to any one of indium tin oxide (ITO), aluminum zinc oxide (AZO), fluorine doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal grids and silver nanoparticles or a combination of at least two. The substrate layer may be a rigid substrate or a flexible substrate, for example, it may be a glass substrate or a plastic substrate, wherein the plastic substrate may include but is not limited to any one of polyethylene terephthalate (PET), cycloolefin copolymer and triacetyl cellulose or a combination of at least two. Therefore, different conductive substrate layers, conductive layers or substrate layers, etc. can be set according to the requirements of actual application scenarios to improve the applicability of the electrochromic device.

[0048] In some embodiments, the sealant layer 140 may be located around the electrochromic film 120, and together with the first substrate 110 and the second substrate 130, enclose a receiving cavity suitable for accommodating the electrochromic film 120. The material of the sealant layer 140 is not particularly limited, and may be, for example, any one of a pressure-sensitive adhesive, a hot melt adhesive, a UV light-curing adhesive, a heat-curing adhesive, and a UV heating dual-curing adhesive, or a combination of at least two thereof. Thus, the sealant layer may be used to protect the periphery of the electrochromic film to prevent water, oxygen, etc. from entering the interior of the electrochromic film, thereby improving the sealing performance of the electrochromic device, and thus improving the service life and reliability of the electrochromic device.

[0049] In some embodiments, Figure 1 As shown, the orthographic projection of the first substrate 110 on the second substrate 130 may overlap with the second substrate 130. In some embodiments, the sealant layer 140 may be connected between the surface of the first substrate 110 facing the second substrate 130 and the surface of the second substrate 130 facing the first substrate 110. Thus, by coinciding the orthographic projection of the first substrate on the second substrate with the second substrate, the first substrate and the second substrate may be aligned so that the sealant layer is located between the first substrate and the second substrate, which plays a good protective role on the sealant layer, can more effectively prevent the sealant layer from falling off, etc., and can make the overall aesthetics of the electrochromic device higher, simplifying the sealing process of the electrochromic device.

[0050] In some embodiments, Figure 2As shown, the first substrate 110 and the second substrate 130 may be staggered so that the orthographic projection of the first substrate 110 on the second substrate 130 does not overlap at least partially with the second substrate 130. In some embodiments, 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. In other embodiments, on the side where the first substrate 110 exceeds 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 peripheral surface of the second substrate 130, and on the side where the second substrate 130 exceeds the first substrate 110, one end of the sealant layer 140 may be connected to the surface of the second substrate 130 facing the first substrate 110, and the other end of the sealant layer 140 may be connected to the outer peripheral surface of the first substrate 110. In some other embodiments, on the side where the first substrate 110 exceeds the second substrate 130, one end of the sealant layer 140 can be connected to the surface of the first substrate 110 facing the second substrate 130, and the other end of the sealant layer 140 can be connected to the surface of the second substrate 130 facing the first substrate 110 and the outer peripheral surface of the second substrate 130. On the side where the second substrate 130 exceeds the first substrate 110, one end of the sealant layer 140 can be connected to the surface of the second substrate 130 facing the first substrate 110, and the other end of the sealant layer 140 can be connected to the surface of the first substrate 110 facing the second substrate 130 and the outer peripheral surface of the second substrate 130. Thus, the sealant layer can be set at different positions according to the actual needs, so as to be located in the circumference of the electrochromic film, so as to form a good protective effect of blocking water and oxygen for the electrochromic film. Furthermore, by staggering the first substrate and the second substrate, the sealant layer on the first substrate is not blocked by the second substrate, and / or the sealant layer on the second substrate is not blocked by the first substrate, which is beneficial to the direct conduction of light or heat, further improving the absorption of light or heat by the sealant layer, thereby improving the curing degree of the sealant layer, and further improving the sealing effect of the sealant layer. At the same time, this can also help to check whether there are defects such as bubbles and through holes in the sealant layer, avoid the appearance of a cavity between the electrochromic film and the sealant layer, and achieve a good sealing effect.

[0051] In some embodiments, Figure 3As shown, the 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 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. In some embodiments, the 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 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 peripheral surface of the second substrate 130. In other embodiments, the 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 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 peripheral surface of the second substrate 130. In this case, by making the orthographic projection of the first substrate on the second substrate cover and exceed the second substrate, the area of ​​the first substrate is made larger than the second substrate, which can protect the second substrate and more effectively shield the second substrate, thereby improving the aesthetics of the electrochromic device; 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, that is, during the light or heat curing of the sealant layer, the sealant layer is further exposed to light or heat, thereby improving the curing effect of the sealant layer; further, by connecting the other end of the sealant layer to the surface of the second substrate facing the first substrate and the outer peripheral surface of the second substrate, the contact area of ​​the sealant layer and the second substrate can be further increased, and the stability of the connection between the sealant layer and the second substrate can be improved, thereby improving the overall connection stability of the electrochromic device and improving the use stability of the electrochromic device.

[0052] The first substrate 110 may be a cover glass or a back glass, and correspondingly, the second substrate 130 may be a back glass or a cover glass. Thus, according to the requirements of the actual application scenario, the orthographic projection of the cover glass on the back glass can cover and exceed the back glass, or the orthographic projection of the back glass on the cover glass can cover and exceed the cover glass, so as to adapt to different application requirements and improve the applicability of the electrochromic device.

[0053] In some embodiments, Figure 3As shown, the edge of the first substrate 110 may be provided with a shielding layer 190, and the shielding layer 190 at least partially, for example, partially or completely shields the sealant layer 140. In other embodiments, the edge of the second substrate 130 may be provided with a shielding layer 190, and the shielding layer 190 at least partially, for example, partially or completely shields the sealant layer 140. In some other embodiments, the edges of the first substrate 110 and the second substrate 130 may also be provided with a shielding layer 190, and the shielding layer 190 at least partially, for example, partially or completely shields the sealant layer 140. Therefore, by providing a shielding layer that at least partially shields the sealant layer at the edge of the first substrate and / or the second substrate, the sealant layer and other structures are shielded and decorated, thereby improving the overall aesthetics of the electrochromic device.

[0054] The material of the shielding layer 190 is not particularly limited. In some embodiments, the shielding layer 190 may be a chrome layer, such as a chrome ring. In other embodiments, the shielding layer 190 may be a steel layer, such as a steel ring. In still other embodiments, the shielding layer 190 may also be a layer of other metal materials. Thus, different shielding material layers may be provided according to the requirements of the actual use scenario to improve the applicability of the electrochromic device.

[0055] In some embodiments, a portion of the first extraction electrode 150 may be disposed on the first conductive substrate layer 121, and another portion may be at least partially located in the sealant layer 140. Figure 4 As shown, a portion of the first extraction electrode 150 may be disposed on the first conductive substrate layer 121, and another portion may be only partially located in the sealant layer 140. In other embodiments, such as Figure 5 As shown, a portion of the first extraction electrode 150 may be disposed on the first conductive substrate layer 121 , and another portion may be completely located in the sealant layer 140 .

[0056] Similarly, in some embodiments, if Figure 6 As shown, a portion of the second extraction electrode 160 may be disposed on the second conductive substrate layer 123 , and another portion may be at least partially located in the sealant layer 140 , for example, partially or completely located in the sealant layer 140 .

[0057] Therefore, according to the needs of different application scenarios, the part of the lead-out electrode that is not connected to the conductive base layer can be completely buried in the sealant layer to achieve good protection of the lead-out electrode and enhance the sealing effect of the sealant layer on the electrochromic film; alternatively, the part of the lead-out electrode that is not connected to the conductive base layer can pass through the sealant layer to be partially exposed outside the sealant layer, thereby facilitating the electrical connection between the external power lead and the lead-out electrode.

[0058] There are no particular restrictions on the material and structure of the first extraction electrode 150 and the second extraction electrode 160. In some embodiments, the first extraction electrode 150 and the second extraction electrode 160 may be a flexible printed circuit (FPC). In some embodiments, the first extraction electrode 150 and the second extraction electrode 160 may be a rigid conductive clip, etc. Thus, extraction electrodes of different materials or structures may be provided according to actual needs to improve the applicability of the electrochromic device.

[0059] In some embodiments, Figure 4 or Figure 5 As shown, 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 portion of the first extraction electrode 150 that is not connected to the first conductive substrate layer 121. In other embodiments, such as Figure 6 As shown, 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 portion of the second extraction electrode 160 that is not connected to the second conductive substrate layer 123 .

[0060] Therefore, by setting the groove on another part of the lead-out electrode, that is, on the partial area not connected to the conductive base layer, the relative position relationship between the groove and the sealant layer can be adjusted so that the sealant layer blocked by the lead-out electrode can be at least partially exposed through the groove in different directions or angles, thereby reducing the blocking area of ​​the sealant layer by the lead-out electrode. Therefore, during the curing process of the sealant layer, the blocking effect of the lead-out electrode on light and / or heat conduction is reduced, and the curing effect of the sealant layer is improved, such as shortening the curing time of the sealant layer and / or enhancing the degree of curing and cross-linking of the sealant layer, thereby improving the sealing performance of the electrochromic device.

[0061] In some embodiments, the first groove 171 and / or the second groove 172 may at least partially expose the sealant layer 140. The so-called exposure here means that when light and / or heat act on the sealant layer 140, the light and / or heat can pass through the first groove 171 and / or the second groove 172 and directly act on the sealant layer 140. In some embodiments, the first groove 171 can reduce the shielding area of ​​the sealant layer 140 by the first extraction electrode 150, and / or the second groove 172 can reduce the shielding area of ​​the sealant layer 140 by the second extraction electrode 160. Here, the so-called reduction of the shielding area of ​​the lead-out electrode on the sealant layer means that when light or / and heat act on the sealant layer 140, the lead-out electrode will at least partially shield the conduction of the light or / and heat. By setting the first groove 171 or / and the second groove 172, 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, thereby increasing the heat or / and light receiving area of ​​the sealant layer 140, that is, reducing the shielding area of ​​the lead-out electrode on the sealant layer 140. Therefore, by setting a groove on the lead-out electrode, the sealant layer is partially exposed, that is, the heat or / and light receiving area of ​​the sealant layer is increased, the blocking effect of the lead-out electrode on light or / and heat conduction is reduced, the curing effect of the sealant layer is improved, and then the sealing performance of the electrochromic device is improved.

[0062] In some embodiments, the first groove 171 may be at least partially located in the sealant layer 140, that is, the first groove 171 may be partially located in the sealant layer 140 and partially located outside the sealant layer 140; Figure 4 As shown in FIG. 5 , the first groove 171 may also be completely located in the sealant layer 140. Similarly, in other embodiments, the second groove 172 may be at least partially located in the sealant layer 140. Figure 6 As shown, the second groove 172 may be partially located in the sealant layer 140 and partially located outside the sealant layer 140; the second groove 172 may also be completely located in the sealant layer 140. 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 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 curing the sealant layer by light or heat, the blocking effect of the extraction electrode on light or heat conduction can be reduced by the groove, and the curing effect of the sealant layer can be improved, such as shortening the curing time of the sealant layer or enhancing the curing crosslinking degree of the sealant layer.

[0063] In some embodiments, the first groove 171 may be at least partially located outside the sealant layer 140, for example, the first groove 171 may be entirely located outside the sealant layer 140. In other embodiments, a portion of the first groove 171 may be located inside 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, for example, 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 inside the sealant layer 140, and another portion of the second groove 172 may be located outside the sealant layer 140. In this case, a groove is provided on at least one of the first lead-out electrode and the second lead-out electrode, and the groove is at least partially located outside the sealant layer, for example, completely outside the sealant layer, or partially located inside the sealant layer and the other partially located outside the sealant layer. Thus, the projection of the groove inside the sealant layer on the first substrate or the second substrate can at least partially cover the projection of the sealant layer on the first substrate or the second substrate. In addition, when the lead-out electrode is bent and blocks the sealant layer, the sealant layer can be at least partially exposed through the groove by the groove. Therefore, in the process of curing the sealant layer by light or heat, the blocking effect of the lead-out electrode on light or heat conduction can be reduced through the groove, thereby improving the curing effect of the sealant layer, for example, shortening the curing time of the sealant layer or enhancing the degree of curing and cross-linking of the sealant layer.

[0064] In some embodiments, when the first groove 171 or / and the second groove 172 are at least partially located in the sealant layer 140, along the length direction of the first extraction electrode 150 or / and the second extraction electrode 160, the size of the first groove 171 or / and the second groove 172 is not greater than the size of the sealant layer 140. In other embodiments, when the first groove 171 or / and the second groove 172 are at least partially located outside the sealant layer 140, along the thickness direction of the first extraction electrode 150 or / and the second extraction electrode 160, the size of the first groove 171 or / and the second groove 172 is not greater than the size of the sealant layer 140. In this way, the sealing requirements of the electrochromic device can be met, the consistency of the sealant layer can be ensured, and the aesthetic appearance of the electrochromic device can be improved.

[0065] In some embodiments, when the first groove 171 or / and the second groove 172 are at least partially located in the sealant layer 140, along the length direction of the first extraction electrode 150 or / and the second extraction electrode 160, the size of the first groove 171 or / and the second groove 172 is greater than the size of the sealant layer 140. In other embodiments, when the first groove 171 or / and the second groove 172 are at least partially located outside the sealant layer 140, along the thickness direction of the first extraction electrode 150 or / and the second extraction electrode 160, the size of the first groove 171 or / and the second groove 172 is greater than the size of the sealant layer 140. Thus, the area of ​​the groove can be increased, the shielding area of ​​the extraction electrode on the sealant layer can be further reduced, and the curing effect of the sealant layer can be improved.

[0066] In some embodiments, the first extraction electrode 150 may have a first bend 181, wherein the first bend 181 may at least partially overlap 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 overlap with the second groove 172. Thus, the position of the bend on the extraction electrode may be set according to actual needs, thereby improving the applicability of the electrochromic device.

[0067] In some embodiments, Figure 4 As shown, the first groove 171 and the first bent portion 181 may be arranged at intervals along the length direction of the first extraction electrode 150. In other embodiments, such as Figure 6 As shown, the second groove 172 can be spaced apart from the second bent portion 182 along the length direction of the second extraction electrode 160. Generally, the bent portion of the extraction electrode is subjected to certain bending stress and external extrusion force, etc., so the mechanical strength of the bent portion is required to be relatively high, and the setting of the groove will reduce the mechanical strength of the extraction electrode; therefore, by setting a spacing between the groove and the bent portion, that is, the groove position is not set at the bent portion, it can be ensured that the bent portion of the extraction electrode has sufficient strength, the strength of the extraction electrode is improved, and thus the use stability and reliability of the electrochromic device are improved.

[0068] In some embodiments, the first groove 171 penetrates the first extraction electrode 150 along the thickness direction of the first extraction electrode 150, or the second groove 172 penetrates the second extraction electrode 160 along the thickness direction of the second extraction electrode 160. In other embodiments, the first groove 171 penetrates the first extraction electrode 150 along the thickness direction of the first extraction electrode 150, and the second groove 172 penetrates the second extraction electrode 160 along the thickness direction of the second extraction electrode 160. The so-called penetration here means that in the thickness direction of the extraction electrode, the groove passes from one end surface (e.g., the top surface) of the extraction electrode to the other end surface (e.g., the bottom surface) of the extraction electrode, thereby forming a hollow groove in the thickness direction of the extraction electrode. As a result, the groove can at least partially expose the sealant layer, so that the exposure of the sealant layer is more obvious, and the shielding effect of the extraction electrode on the sealant layer is more comprehensively and effectively reduced, thereby more comprehensively and effectively improving the curing effect of the sealant layer.

[0069] In addition, by making the groove penetrate the lead-out electrode in the thickness direction of the lead-out electrode, that is, making the groove a hollow groove that completely penetrates the lead-out electrode, when the groove is partially or completely located in the sealant layer, the sealant layers on both sides of the thickness direction of the lead-out electrode can also form a connected integrated structure through the groove, so as to improve the connection stability of the sealant layer and enhance the overall sealing effect of the electrochromic device.

[0070] 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 at least penetrate the first non-transparent conductive layer 152, for example, only penetrate the first non-transparent conductive layer 152, or penetrate the first non-transparent conductive layer 152 while also penetrating at least one of the first transparent substrate layer 151 and the third transparent substrate layer 153.

[0071] 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 at least penetrate the second non-transparent conductive layer 162, for example, only penetrate the second non-transparent conductive layer 162, or penetrate the second non-transparent conductive layer 162 while also penetrating at least one of the second transparent substrate layer 161 and the fourth transparent substrate layer 163.

[0072] Therefore, by setting the base material layer of the extraction electrode to be a transparent material and making the groove at least pass through the non-transparent conductive layer, the blocking effect of the extraction electrode on light or heat conduction can be reduced, and the curing effect of the sealant layer can be improved. At the same time, it can more effectively ensure that the extraction electrode has sufficient mechanical strength, and improve the stability and reliability of the electrochromic device. Furthermore, by making the groove pass through the multi-layer structure of the extraction electrode, the blocking effect of the extraction electrode on light or heat conduction during the curing process of the sealant layer can be more effectively reduced, and the curing effect of the sealant layer can be improved.

[0073] In the embodiment of the present application, the number of the first groove 171 and the second groove 172 is not particularly limited, for example, it can be one or more. Figure 4 As shown, the number of the first groove 171 can be one; similarly, the number of the second groove 172 can also be one. In other embodiments, such as Figure 5 As shown, the number of the first grooves 171 can be two; similarly, the number of the second grooves 172 can also be two. In some other embodiments, the number of the first grooves 171 can be three; similarly, as shown in FIG. Figure 6 As shown, the number of the second grooves 172 may also be three. In this case, on the one hand, the shielding area of ​​the lead-out electrode to the sealant layer can be further reduced by increasing the number of grooves; on the other hand, by increasing the number of grooves instead of directly increasing the area of ​​the grooves, the structural stability of the lead-out electrode can be ensured while reducing the shielding area of ​​the lead-out electrode to the sealant layer, for example, the possibility of the lead-out electrode being broken can be reduced, thereby improving the use stability and reliability of the electrochromic device.

[0074] In some embodiments, two or more first grooves 171 may be arranged at intervals along the width direction of the first extraction electrode 150, or two or more second grooves 172 may be arranged at intervals along the width direction of the second extraction electrode 160. In other embodiments, two or more first grooves 171 are arranged at intervals along the width direction of the first extraction electrode 150, and two or more second grooves 172 are arranged at intervals along the width direction of the second extraction electrode 160. Thus, while increasing the groove area, it is possible to ensure that the extraction electrode has sufficient mechanical strength, which can improve the curing effect of the sealant layer and the service life of the extraction electrode.

[0075] In some embodiments, two or more first grooves 171 may be arranged at intervals along any direction of the first extraction electrode 150, for example, they may be arranged at intervals along the length direction of the first extraction electrode 150; or, two or more second grooves 172 may be arranged at intervals along any direction of the second extraction electrode 160, for example, they may be arranged at intervals along the length direction of the second extraction electrode 160. In other embodiments, two or more first grooves 171 may be arranged at intervals along any direction of the first extraction electrode 150, for example, they may be arranged at intervals along the length direction of the first extraction electrode 150; and, two or more second grooves 172 may be arranged at intervals along any direction of the second extraction electrode 160, for example, they may be arranged at intervals along the length direction of the second extraction electrode 160. Thus, according to the actual needs, two or more grooves may be arranged along any direction of the extraction electrode, for example, the length direction, so as to reduce the shielding area of ​​the extraction electrode on the sealant layer, improve the curing effect of the sealant layer, and thus improve the sealing performance of the electrochromic device.

[0076] In an embodiment of the present application, along the width direction of the first extraction electrode 150, the size of the first extraction electrode 150 is W1, and the size of the first groove 171 is W3, 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<1. In other embodiments, the following relationship is satisfied between W1 and W3: 0.01≤W3 / W1<1. In yet other embodiments, the following relationship is satisfied between W1 and W3: 0.05≤W3 / W1<1. In still other embodiments, the following relationship is satisfied between W1 and W3: W3 / W1≤0.8. In still other embodiments, the following relationship is satisfied between W1 and W3: W3 / W1≤0.6. In still other embodiments, the following relationship is satisfied between W1 and W3: 0.06≤W3 / W1≤0.3.

[0077] In an embodiment of the present application, along the width direction of the second extraction electrode 160, the size of the second extraction electrode 160 is W2, and the size of the second groove 172 is W4, 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, the following relationship is satisfied between W2 and W4: 0.01≤W4 / W2<1. In yet other embodiments, the following relationship is satisfied between W2 and W4: 0.05≤W4 / W2<1. In yet other embodiments, the following relationship is satisfied between W2 and W4: W4 / W2≤0.8. In yet other embodiments, the following relationship is satisfied between W2 and W4: W4 / W2≤0.6. In yet other embodiments, the following relationship is satisfied between W2 and W4: 0.06≤W4 / W2≤0.3.

[0078] Generally speaking, when the groove width is too large, although the area of ​​the exposed sealant layer can be increased, which is beneficial to improving the curing effect of the sealant layer, the strength of the lead electrode will be low, such as being prone to breakage, etc., affecting the stability of the electrochromic device; when the groove width is too small, although the lead electrode can maintain a certain strength, such as being less likely to break, etc., it will also reduce the area of ​​the exposed sealant layer, which is not conducive to improving the curing effect of the sealant layer. Therefore, controlling the width of the groove within a certain range can not only ensure the strength of the lead electrode and prevent it from breaking, but also reduce the area of ​​the lead electrode blocking the sealant layer and improve the curing effect of the sealant layer.

[0079] In an embodiment of the present application, the spacing between two or more first grooves 171 is W5, wherein the relationship between W1 and W5 is not particularly limited. In some embodiments, the following relationship is satisfied between W1 and W5: W5 / W1<1. In other embodiments, the following relationship is satisfied between W1 and W5: 0.01≤W5 / W1<1. In yet other embodiments, the following relationship is satisfied between W1 and W5: 0.05≤W5 / W1<1. In yet other embodiments, the following relationship is satisfied between W1 and W5: W5 / W1≤0.5. In yet other embodiments, the following relationship is satisfied between W1 and W5: W5 / W1≤0.1. In yet other embodiments, the following relationship is satisfied between W1 and W5: 0.06≤W5 / W1≤0.08.

[0080] In an embodiment of the present application, the spacing between 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, the following relationship is satisfied between W2 and W6: 0.01≤W6 / W2<1. In yet other embodiments, the following relationship is satisfied between W2 and W6: 0.05≤W6 / W2<1. In yet other embodiments, the following relationship is satisfied between W2 and W6: W6 / W2≤0.5. In yet other embodiments, the following relationship is satisfied between W2 and W6: W6 / W2≤0.1. In yet other embodiments, the following relationship is satisfied between W2 and W6: 0.06≤W6 / W2≤0.08.

[0081] In general, when the groove width is too large or / and the spacing between the grooves is too small, although the area of ​​the exposed sealant layer can be increased, which is beneficial to improving the curing effect of the sealant layer, the strength of the lead-out electrode will be low, such as being prone to breakage, etc., affecting the stability of the electrochromic device; when the groove width is too small or / and the spacing between the grooves is too large, although the lead-out electrode can maintain a certain strength, such as being not prone to breakage, etc., it will also reduce the area of ​​the exposed sealant layer, which is not conducive to improving the curing effect of the sealant layer. Therefore, controlling the groove width and / or spacing within a certain range can not only ensure the strength of the lead-out electrode and prevent it from breaking, but also reduce the area of ​​the lead-out electrode blocking the sealant layer and improve the curing effect of the sealant layer.

[0082] The present application also provides a rearview mirror 1000, comprising the electrochromic device 100 described in the above embodiment, wherein a reflective layer 200 may be provided on the first substrate 110 or the second substrate 130. In some embodiments, a reflective layer 200 may be provided on the side of the first substrate 110 facing the electrochromic film 120. In other embodiments, such as Fig. 9 As shown, a reflective layer 200 may be provided on the side of the second substrate 130 facing the electrochromic film 120. Thus, by providing the reflective layer, light can be reflected, thereby realizing the rearview function of the vehicle rearview mirror, and the anti-glare effect of the rearview mirror can be realized by utilizing the color change phenomenon of the electrochromic film; 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, thereby extending the service life of the rearview mirror.

[0083] In some embodiments, the reflective layer 200 may have a hollow region, and the hollow region may at least partially overlap with the projection of the sealant layer 140 on the first substrate 110 or the second substrate 130. In some embodiments, the hollow region may be a hollow inside the reflective layer 200, that is, the hollow region may form a structure such as a breakpoint at any position in the middle of the reflective layer 200. In other embodiments, the hollow region may also be set at the edge of the reflective layer 200, that is, the edge of the reflective layer is removed (the reflective layer is narrowed, etc.) through the hollow region. Thus, by setting the hollow region, when viewed from the side of the first substrate or the second substrate away from the electrochromic film, the sealant layer can be at least partially visible, that is, the sealant layer is partially exposed, so that light can be irradiated or heat can be conducted through the hollow region to improve the curing effect of the sealant layer.

[0084] In all examples shown and described herein, any specific value should be interpreted as merely exemplary, not limiting, and therefore, other examples of the exemplary embodiments may have different values. Moreover, the features included in different embodiments may be appropriately combined or adjusted according to the requirements of the technical solution.

[0085] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An electrochromic device, characterized in that: include: A first substrate, an electrochromic film, and a second substrate stacked in sequence, wherein the electrochromic film comprises a first conductive base layer, an electrochromic intermediate layer, and a second conductive base layer stacked in sequence; A sealant layer, the sealant layer is located in the circumference of the electrochromic film, and together with the first substrate and the second substrate, encloses a receiving cavity, and the receiving cavity is suitable for receiving the electrochromic film; A first extraction electrode, wherein a portion of the first extraction electrode is disposed on the first conductive substrate layer, and another portion of the first extraction electrode is at least partially located in the sealant layer; a second extraction electrode, a portion of the second extraction electrode being disposed on the second conductive substrate layer, and another portion of the second extraction electrode being at least partially disposed within the sealant layer; Wherein, a first groove is provided on another part of the first lead-out electrode, or / and a second groove is provided on another part of the second lead-out electrode; 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; or, 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; Along the width direction of the first lead-out electrode, the size of the first lead-out electrode is W1, and the size of the first groove is W3, wherein W1 and W3 satisfy the following relationship: 0.06≤W3 / W1≤0.3; Or / and, along the width direction of the second lead electrode, the size of the second lead electrode is W2, and the size of the second groove is W4, wherein W2 and W4 satisfy the following relationship: 0.06≤W4 / W2≤0.

3.

2. The electrochromic device according to claim 1, characterized in that: The first groove penetrates the first extraction electrode along the thickness direction of the first extraction electrode; Or / and, the second groove penetrates the second lead-out electrode along the thickness direction of the second lead-out electrode.

3. The electrochromic device according to claim 1, characterized in that: There are two or more first grooves or / and second grooves, wherein: More than two first grooves are arranged at intervals along the width direction of the first lead-out electrode, or / and more than two second grooves are arranged at intervals along the width direction of the second lead-out electrode.

4. The electrochromic device according to claim 3, characterized in that: The distance between two or more of the first grooves is W5, wherein W1 and W5 satisfy the following relationship: 0.06≤W5 / W1≤0.08; Or / and, the spacing between two or more of the second grooves is W6, wherein W2 and W6 satisfy the following relationship: 0.06≤W6 / W2≤0.

08.

5. The electrochromic device according to claim 1, characterized in that: The first lead-out electrode has a first bending portion, and the first groove and the first bending portion are arranged at intervals along the length direction of the first lead-out electrode; Or / and, the second lead-out electrode has a second bending portion, and the second groove and the second bending portion are arranged at intervals along the length direction of the second lead-out electrode.

6. The electrochromic device according to claim 1, characterized in that: 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 located between the first transparent substrate layer and the third transparent substrate layer, and the first groove at least penetrates the first non-transparent conductive layer; Or / and, the second lead-out electrode includes a second transparent substrate layer, a second non-transparent conductive layer and a fourth transparent substrate layer, the second non-transparent conductive layer is located between the second transparent substrate layer and the fourth transparent substrate layer, and the second groove at least penetrates the second non-transparent conductive layer.

7. The electrochromic device according to claim 1, characterized in that: The orthographic projection of the first substrate on the second substrate coincides with the second substrate, and the sealant layer is connected between a surface of the first substrate facing the second substrate and a surface of the second substrate facing the first substrate; Alternatively, 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; Alternatively, the first substrate and the second substrate are staggered so that the orthographic projection of the first substrate on the second substrate does not at least partially overlap with the second substrate, one end of a portion of the sealant layer is connected to the surface of the first substrate facing the second substrate, the other end of a portion 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 another portion of the sealant layer is connected to the surface of the second substrate facing the first substrate, and the other end of another portion 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.

8. A rearview mirror, characterized in that: The electrochromic device according to any one of claims 1 to 7, wherein a reflective layer is provided on the first substrate or the second substrate.

9. The rearview mirror according to claim 8, characterized in that: The reflective layer has a hollow area, and the hollow area at least partially overlaps with a projection of the sealant layer on the reflective layer.

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