Electrochromic film, electrochromic device, and terminal product

Abstract

An electrochromic film (10) and an electrochromic device. The electrochromic film (10) comprises a first conductive substrate layer (11), an electrochromic stack layer (12), and a second conductive substrate layer (13) which are sequentially stacked; a first groove (110) is formed at the edge of the first conductive substrate layer (11); a second groove (130) is formed at the edge of the second conductive substrate layer (13); part of the area of the first groove (110) and part of the area of the second groove (130) overlap in the electrochromic stack layer (12) and form an insulating area (100); the first groove (110) forms a first conductive area (111) on the second conductive substrate layer (13), and the second groove (130) forms a second conductive area (131) on the first conductive substrate layer (11); the width of the first conductive area (111) and the width of the second conductive area (131) are a, the width of the insulating area (100) is b, and a and b in a local area satisfy a relation: b≤a. The electrochromic film (10) can effectively mitigate wrinkling at the edge, thereby improving the aesthetics and the visual experience of users.

Description

Electrochromic films, electrochromic devices and terminal products

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application with application number 202310944454.3 filed with the China Patent Office on July 28, 2023, entitled “Electrochromic Film, Electrochromic Device and Terminal Product”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the technical field of electrochromism, and more specifically, relates to an electrochromic film, an electrochromic device and a terminal product. Background Art

[0004] Electrochromism is a phenomenon in which a material's optical properties (reflectivity, transmittance, absorptivity, etc.) undergo a stable, reversible color change under the influence of an applied electric field. This phenomenon manifests itself as a reversible change in color and transparency. Electrochromic films, utilizing this technology, have broad application prospects in display devices, dimming glass, information storage, and other fields.

[0005] Existing electrochromic films are designed to be flexible and bendable to accommodate various applications, such as flat and curved surfaces, such as car sunroofs and mirrors. However, curved electrochromic films are prone to wrinkling at the edges, resulting in an unsightly appearance and a poor user experience.

[0006] Summary of the Invention

[0007] The purpose of the present application is to provide an electrochromic film, an electrochromic device and a terminal product to solve the technical problem in the prior art that wrinkles are easily generated on the edges of electrochromic films.

[0008] To achieve the above-mentioned purpose, the first aspect of the present application provides an electrochromic film, comprising a first conductive substrate layer, an electrochromic stacking layer and a second conductive substrate layer stacked in sequence; a first groove is provided at the edge of the first conductive substrate layer, and the first groove passes through the first conductive substrate layer and the electrochromic stacking layer; a second groove is provided at the edge of the second conductive substrate layer, and the second groove passes through the second conductive substrate layer and the electrochromic stacking layer; a part of the first groove and a part of the second groove overlap at the electrochromic stacking layer and form an insulating area, and the insulating area passes through the first conductive substrate layer, the electrochromic stacking layer and the second conductive substrate layer; the first groove is formed at the edge of the second conductive substrate layer, and the second groove passes through the second conductive substrate layer and the electrochromic stacking layer; A first conductive area is formed on the second conductive base layer, and the second groove forms a second conductive area on the first conductive base layer; the width of the first conductive area and the width of the second conductive area are both a, and the width of the insulating area is b, wherein the width a of the first conductive area and the width of the second conductive area located in the local area of ​​the edge of the electrochromic film and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfy the following relationship: b≤a; and the local area of ​​the edge of the electrochromic film includes the middle part of the edge of the electrochromic film, or / and, a recessed area is formed on the edge of the electrochromic film, and the local area of ​​the edge of the electrochromic film includes the recessed area.

[0009] Relevant research has shown that not all edges of electrochromic films with curved surfaces, especially those with hyperbolic or multi-curved surfaces, will wrinkle or severely wrinkle. Wrinkles or severe wrinkles typically occur in the middle of the edge of the electrochromic film. Alternatively, when there is a recessed area on the edge of the electrochromic film, such as in the middle or corner of the edge, the wrinkled or severe wrinkle area is often located within the recessed area. Therefore, in the first aspect of the present application, by increasing the width a of the first conductive area and the second conductive area located in a local area (for example, the middle part of the edge of the electrochromic film or / and the recessed area at the edge of the electrochromic film), and reducing the width b of the insulating area so that b≤a, the proportion of the uncut area at the edge of the electrochromic film (although the insulating area is the cut part, in order to avoid short circuit between the first conductive area and the second conductive area, insulating glue is usually provided in the insulating area, so that it is transformed from a cut area to an "uncut area" of the electrochromic film) can be relatively reduced, that is, the proportion of the first conductive area and the second conductive area at the edge of the electrochromic film is relatively high, so that the stress generated at the edge of the electrochromic film can be fully and effectively released through the first groove and the second groove, thereby reducing the degree of wrinkles in the local area, or even avoiding the generation of wrinkles in the local area, so as to improve the aesthetics of the appearance of the electrochromic film, prevent the electrochromic film from falling off or affecting the color-changing performance due to wrinkles, and enhance the user's visual experience.

[0010] Preferably, the width a of the first conductive region and the second conductive region outside the localized edge region of the electrochromic film, and the width b of the insulating region outside the localized edge region of the electrochromic film, satisfy the following relationship: b ≤ a. This reduces or prevents wrinkles in areas of the electrochromic film's edge other than the localized edge region, further enhancing the overall aesthetics of the electrochromic film. Furthermore, by ensuring that b ≤ a is satisfied in all areas of the electrochromic film's edge, for example, by maintaining consistent values ​​for a and b across all areas, the fabrication process for the first and second grooves can be simplified, improving processing efficiency and reducing time costs.

[0011] Preferably, the width a of the first conductive region and the second conductive region outside the localized region at the edge of the electrochromic film, and the width b of the insulating region outside the localized region at the edge of the electrochromic film, satisfy the following relationship: b>a. Typically, wrinkles are less likely to occur or are less severe outside the localized region at the edge of the electrochromic film, and thus b ≤ a need not be satisfied. For example, b>a can be sufficient. Thus, by increasing the value of b, the likelihood of electrical connection between the first and second conductive regions can be further reduced, particularly the likelihood of short-circuit electrical connection within the insulating region, thereby improving the safety and reliability of the electrochromic film. Furthermore, the values ​​of a and b can be designed in a variety of ways based on actual needs to improve the applicability of the electrochromic film.

[0012] Optionally, the first groove and the second groove are multiple in number, forming multiple first conductive areas, multiple second conductive areas, and multiple insulating areas. Thus, multiple first conductive areas, second conductive areas, and insulating areas can be distributed around the edge of the electrochromic film, thereby providing ample space at the edge of the film to reduce the formation of wrinkles.

[0013] Preferably, the width b of the insulating area located in the local area of ​​the edge of the electrochromic film is in the range of b ≤ 30 mm. More preferably, the width b of the insulating area located in the local area of ​​the edge of the electrochromic film is in the range of b ≥ 0 mm. Even more preferably, the width b of the insulating area located in the local area of ​​the edge of the electrochromic film is in the range of 2 mm ≤ b ≤ 15 mm. Typically, although the insulating area is the cut portion, in order to prevent a short circuit between the first conductive area and the second conductive area, an insulating glue or the like is usually provided in the insulating area, thereby transforming it from a cut area into an "uncut area" of the electrochromic film. When the spacing is too large, the wrinkles generated are more obvious and are not easily released by the first groove and the second groove. When the spacing is too small, the insulating areas are easily electrically connected due to squeezing, and even short circuits may occur, which is not conducive to the control of the color change process of the electrochromic film. Therefore, by making the width b of the insulating area within a certain range, it can be more conducive to alleviating the wrinkles on the edge of the electrochromic film, or it can avoid the occurrence of electrical connection between the adjacent first conductive area and the second conductive area. It can even be conducive to alleviating the wrinkles on the edge of the electrochromic film and avoiding the occurrence of electrical connection between the first conductive area and the second conductive area.

[0014] Preferably, the ratio of the width (a) of the first conductive region and the width (b) of the second conductive region located in a localized area at the edge of the electrochromic film to the width (b) of the insulating region located in a localized area at the edge of the electrochromic film satisfies the following relationship: 5 ≤ a / b. In this case, the proportion of the insulating region width can be further reduced, so that the proportion of the first conductive region and the second conductive region at the edge of the electrochromic film is relatively higher. This allows the first and second grooves to more effectively release stress generated at the edge of the electrochromic film, thereby reducing the degree of wrinkling in the localized area and even preventing the formation of wrinkles in the localized area. This further improves the aesthetics of the electrochromic film, prevents the film from falling off or affecting its color-changing performance due to wrinkling, and further enhances the user's visual experience.

[0015] Preferably, the ratio of the width a of the first conductive area and the width of the second conductive area located in the local area of ​​the edge of the electrochromic film to the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfies the following relationship: 5≤a / b≤50; and the sum of the width a of the first conductive area and the width of the second conductive area located in the local area of ​​the edge of the electrochromic film and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfies the following relationship: 60mm≤a+b≤750mm. Generally, the purpose of setting the first groove and the second groove at the edge of the electrochromic film is to introduce external current or voltage to the first conductive base layer and the second conductive base layer to form an electric field on both sides of the electrochromic stack layer, driving the ions or electrons in the electrochromic stack layer to move, so as to adjust the color or transmittance of the electrochromic film. The more first conductive areas and the more uniform the distribution, the more uniform the color change rate or transmittance change rate of the electrochromic film will be. However, the length of the edge of the electrochromic film is limited. When a single first conductive area Or when the width of the second conductive area is too large, it is not conducive to forming multiple first conductive areas or second conductive areas at the edge of the electrochromic film. Therefore, by limiting the values ​​of a and b in the local area to 5≤a / b≤50, or / and 60mm≤a+b≤750mm, it can not only alleviate or eliminate the wrinkles in the local area, but also be conducive to the uniform arrangement of multiple first conductive areas, second conductive areas and insulating areas, so as to improve the aesthetics of the electrochromic film while ensuring the color change uniformity of the electrochromic film, so as to further enhance the user experience.

[0016] Preferably, the width a of the first conductive area and the second conductive area located in the local area of ​​the edge of the electrochromic film, and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film are respectively: a = 88 mm, b = 8 mm. In this case, when the widths of the first and second conductive areas are 88 mm and the width of the insulating area is 8 mm, wrinkles in the local area of ​​the edge of the electrochromic film can be effectively alleviated or eliminated, and the uniform arrangement of the multiple first grooves or second grooves at the edge of the electrochromic film is also facilitated, thereby improving the color change uniformity of the electrochromic film, thereby fully enhancing the user experience.

[0017] Preferably, there are more than two first grooves, and the second grooves are adjacent to the two first grooves, wherein a partial area of ​​one of the first grooves overlaps with a partial area of ​​the second groove at the electrochromic stack layer and forms the insulating area, and a first uncut area is provided between the other first groove and the second groove. More preferably, there are more than two second grooves, and the first grooves are adjacent to the two second grooves, wherein a partial area of ​​one of the second grooves overlaps with a partial area of ​​the first groove at the electrochromic stack layer and forms the insulating area, and a second uncut area is provided between the other second groove and the first groove. In this case, a completely cut insulating area or an uncut spacer area can be formed between the first groove and the second groove at the edge of the electrochromic film, thereby forming a richer electrochromic film edge structure to meet the needs of different application scenarios.

[0018] Preferably, the width of the first uncut area and the width of the second uncut area are both c, and the width c of the first uncut area and the width of the second uncut area located in the local area of ​​the edge of the electrochromic film and the width a of the first conductive area and the width a of the second conductive area located in the local area of ​​the edge of the electrochromic film satisfy the following relationship: c≤a. Thus, by increasing the width a of the conductive area located in the local area (for example, the middle part of the edge of the electrochromic film or / and the recessed area at the edge of the electrochromic film) and reducing the width c of the uncut area so that c≤a, the proportion of the uncut area at the edge of the electrochromic film can be relatively reduced, that is, the proportion of the conductive area at the edge of the electrochromic film is relatively high, so that the stress generated by the edge of the electrochromic film is fully and effectively released through the conductive area, thereby reducing the degree of wrinkles in the local area, or even avoiding the generation of wrinkles in the local area, thereby improving the aesthetics of the electrochromic film, preventing the electrochromic film from falling off or affecting the color changing performance due to wrinkles, and improving the user's visual experience.

[0019] Preferably, the electrochromic film has a dome height along the first direction of H1, and a dome height along the second direction of H2, wherein the first direction and the second direction are perpendicular to each other, and the product of the dome height H1 in the first direction and the dome height H2 in the second direction satisfies the following relationship: H1×H2≤2500mm 2 / m 4 Generally speaking, the greater the arch height of the electrochromic film, the greater the possibility of wrinkles on its edge, or the more severe the wrinkles formed on its edge (deeper or more wrinkles, etc.). Therefore, by limiting the arch height of the electrochromic film to a certain range, the wrinkles on the edge of the electrochromic film can be further alleviated, thereby further improving the aesthetics of the electrochromic film.

[0020] Preferably, the thickness of the first conductive substrate layer is greater than or equal to 120 μm; and / or the thickness of the second conductive substrate layer is greater than or equal to 120 μm. Thus, by limiting the thickness of the conductive substrate, for example, making the thickness of the first conductive substrate layer and / or the second conductive substrate layer thicker, the space of the first groove and / or the second groove along the thickness direction of the electrochromic film is larger, thereby providing sufficient space for the edge of the electrochromic film to extend, thereby reducing the formation of wrinkles.

[0021] Preferably, a first bus bar is provided on the edge of the first conductive substrate layer away from the electrochromic stack layer, and a portion of the first bus bar extends into the first conductive area and adheres to the side of the second conductive substrate layer close to the electrochromic stack layer. More preferably, a second bus bar is provided on the edge of the second conductive substrate layer away from the electrochromic stack layer, and a portion of the second bus bar extends into the second conductive area and adheres to the side of the first conductive substrate layer close to the electrochromic stack layer. Thus, an electrical connection can be formed with the second conductive substrate layer through the first bus bar, and an external current or voltage can be quickly introduced into the second conductive substrate layer through the first bus bar. An electrical connection can be formed with the first conductive substrate layer through the second bus bar, and an external current and voltage can be quickly introduced into the first conductive substrate layer through the second bus bar, thereby increasing the speed at which the external current or voltage is conducted to the first conductive substrate layer and the second conductive substrate layer, thereby increasing the color change speed or transmittance change speed of the electrochromic film.

[0022] Preferably, insulating glue is provided in the insulating region. More preferably, insulating glue is provided in the insulating region to separate the first busbar from the second busbar in the insulating region. More preferably, along the stacking direction of the first conductive substrate layer, the electrochromic stacked layer, and the second conductive substrate layer, the sum of the thicknesses of the first conductive substrate layer, the electrochromic stacked layer, and the second conductive substrate layer is greater than the thickness of the insulating glue. Therefore, by setting the insulating glue, the electrical contact between the first bus bar and the second bus bar can be prevented more effectively, thereby more effectively avoiding the short circuit between the first conductive area and the second conductive area; and, in the stacking direction of the electrochromic film, by further limiting the sum of the thickness of the first conductive base layer, the electrochromic stacking layer and the second conductive base layer to be greater than the thickness of the insulating glue, the thickness of the insulating glue is made smaller, and the thickness formed after the stacking of the first bus bar, the insulating glue and the second bus bar can be reduced, that is, the thickness of the edge of the electrochromic film is reduced, which is more conducive to the subsequent processing of the electrochromic film. For example, it can prevent the stacking of the first bus bar, the insulating glue and the second bus bar from being subjected to excessive extrusion pressure, which may cause damage or extrusion short circuit, thereby further improving the stability and reliability of the electrochromic film.

[0023] Preferably, the portion of the first busbar located in the insulating region is tilted. More preferably, the portion of the second busbar located in the insulating region is tilted. Thus, by having the first and / or second busbars pass through the insulating region at an angle, less insulating glue is required in the insulating region, thereby isolating the first and second busbars, thereby preventing short circuits in the electrochromic film and improving the safety and reliability of the electrochromic film.

[0024] Optionally, the depth of the first conductive region and the depth of the second conductive region are both h, where 0 mm < h ≤ 100 mm. Generally, the greater the depth of the first conductive region and the second conductive region, the greater the width of the electrochromic stack layer whose edges are cut and removed, resulting in a reduction in the area of ​​the electrochromic stack layer and, consequently, a reduction in the color-changing area of ​​the electrochromic film. Therefore, by limiting the depths of the first conductive region and the second conductive region to within the aforementioned range, a sufficiently large color-changing area of ​​the electrochromic film can be ensured.

[0025] Optionally, the first groove and the second groove are alternately distributed at the edge of the electrochromic film, forming alternating first and second conductive areas. In this case, by alternating the first and second grooves, more uniform grooves can be formed at the edge of the electrochromic film, so that the grooves can more effectively release stress generated at the edge of the electrochromic film. For example, the stress generated by the first conductive substrate and the second conductive substrate can be simultaneously released by the first and second grooves, thereby more effectively alleviating wrinkles at the edge of the electrochromic film, thereby reducing the degree of wrinkles in local areas, and even avoiding the formation of wrinkles in local areas, thereby further improving the aesthetics of the electrochromic film, more effectively preventing the electrochromic film from falling off or affecting the color changing performance due to wrinkles, and further enhancing the user's visual experience.

[0026] Optionally, a portion of any first groove overlaps with a portion of the second groove adjacent to it, forming the insulating region, and another portion of the second groove overlaps with another adjacent first groove, forming another insulating region. This eliminates any uncut spacing between the first and second grooves, minimizing the proportion of uncut areas and further reducing the area where wrinkles are generated, thereby alleviating or preventing the formation of wrinkles.

[0027] A second aspect of the present application provides an electrochromic device, comprising a substrate layer and the electrochromic film as described above, wherein the substrate layer and the electrochromic film are stacked.

[0028] In the second aspect of the present application, since the electrochromic device includes the above-mentioned electrochromic film, the wrinkles of the electrochromic device can be effectively alleviated or eliminated, so as to have a more beautiful appearance, higher user acceptance and better visual experience; and the substrate layer can also play a supporting or protective role for the electrochromic film.

[0029] Optionally, the substrate layer comprises at least two layers, and the electrochromic film is disposed between the at least two substrate layers. Preferably, the substrate layer is a glass layer. Thus, by providing at least two substrate layers, the electrochromic film can be placed between the substrate layers, thereby providing a more comprehensive and effective support or protection for the electrochromic film. Furthermore, by providing the substrate layer as a glass layer, sufficient rigidity can be ensured for the electrochromic device to prevent deformation, thereby better protecting or supporting the electrochromic film.

[0030] The third aspect of the present application provides a terminal product, including the electrochromic film or electrochromic device as described above, wherein the terminal product includes any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, an electronic product housing, glasses, a vehicle, and a display panel.

[0031] In the third aspect of the present application, since the terminal product includes the above-mentioned electrochromic film, the wrinkles of the terminal product can also be effectively alleviated or eliminated, so as to improve the aesthetics of the terminal product and thus enhance the user's visual experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] FIG1 is a schematic diagram of an electrochromic film provided in a first embodiment of the present application;

[0034] FIG2 is a cross-sectional view 1 of FIG1 ;

[0035] FIG3 is a second cross-sectional view of FIG1 ;

[0036] FIG4 is a side view of FIG1;

[0037] FIG5 is a schematic diagram of an electrochromic film provided in a second embodiment of the present application;

[0038] FIG6 is a schematic diagram of an electrochromic film provided in a third embodiment of the present application;

[0039] FIG7 is a schematic diagram of the structure of FIG2 with the first bus bar and the second bus bar installed;

[0040] FIG8 is a schematic diagram of the structure of FIG7 with insulating glue added;

[0041] FIG9 is a schematic diagram of an electrochromic film provided in a fourth embodiment of the present application;

[0042] FIG10 is a schematic diagram of an electrochromic film provided in a fifth embodiment of the present application;

[0043] FIG11 is a cross-sectional view 1 of FIG9 ;

[0044] FIG12 is a second cross-sectional view of FIG9 ;

[0045] FIG13 is a schematic diagram of an electrochromic film provided in a sixth embodiment of the present application;

[0046] FIG14 is a cross-sectional view 1 of FIG13;

[0047] FIG15 is a second cross-sectional view of FIG13;

[0048] FIG16 is a schematic diagram of an electrochromic film provided in a seventh embodiment of the present application;

[0049] FIG17 is a schematic diagram of the structure of the electrochromic device provided in an embodiment of the present application.

[0050] Among them, the figure marks are explained: 10, electrochromic film; 11, first conductive substrate layer; 110, first groove; 111, first conductive area; 112, first conductive layer; 113, first substrate layer; 12, electrochromic stack layer; 121, electrochromic layer; 122, electrolyte layer; 123, ion storage layer; 13, second conductive substrate layer; 130, second groove; 131, second conductive area; 132, second conductive layer; 133, second substrate layer; 14, first bus bar; 15, second bus bar; 16, insulating glue; 100, insulating area; 101, recessed area; 102, middle section; 20, glass layer. DETAILED DESCRIPTION

[0051] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0052] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0053] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0054] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0055] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0056] References to "one embodiment" or "some embodiments" in the present specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized. "Multiple" means two or more.

[0057] An embodiment of the present application provides an electrochromic film 10, as shown in Figures 1 to 4, including a first conductive base layer 11, an electrochromic stacked layer 12 and a second conductive base layer 13 stacked in sequence; a first groove 110 is provided at the edge of the first conductive base layer 11, and the first groove 110 passes through the first conductive base layer 11 and the electrochromic stacked layer 12; a second groove 130 is provided at the edge of the second conductive base layer 13, and the second groove 130 passes through the second conductive base layer 13 and the electrochromic stacked layer 12.

[0058] There is no particular limitation on the number of first grooves 110 and second grooves 130. In some embodiments, there may be at least one first groove 110 and at least one second groove 130. In other embodiments, there may be at least two first grooves 110 and at least two second grooves 130. Thus, different numbers of first grooves and second grooves may be provided based on actual needs to improve the applicability of the electrochromic film.

[0059] In the embodiment of the present application, a portion of the first groove 110 and a portion of the second groove 130 overlap at the electrochromic stack layer 12 and form an insulating region 100. The insulating region 100 penetrates the first conductive base layer 11, the electrochromic stack layer 12 and the second conductive base layer 13; the first groove 110 forms a first conductive region 111 on the second conductive base layer 13, and the second groove 130 forms a second conductive region 131 on the first conductive base layer 11; the width of the first conductive region 111 and the width of the second conductive region 131 are both a, and the width of the insulating region 100 is b, wherein the width a of the first conductive region 111 and the width a of the second conductive region 131 located in the local area of ​​the edge of the electrochromic film 10 and the width b of the insulating region 100 located in the local area of ​​the edge of the electrochromic film 10 satisfy the following relationship: b≤a.

[0060] It should be noted that, as shown in Figures 5 and 6, not all edge locations of an electrochromic film 10 having a curved surface, especially a hyperbolic or multi-curved electrochromic film 10, will have wrinkles or severe wrinkles. The area where wrinkles or severe wrinkles occur is usually located in the middle section 102 of the edge of the electrochromic film 10. Alternatively, when there is a recessed area 101 at the edge of the electrochromic film 10, such as in the middle section 102 or corner portion of the edge of the electrochromic film 10, the area where wrinkles or severe wrinkles occur is often located within the recessed area 101.

[0061] The so-called middle section here refers to the area located at the edge of the electrochromic film and not close to the corners of the electrochromic film. It will be understood that Figure 6 only schematically illustrates the area where the middle section may be located. For example, when the electrochromic film 10 is a rectangular film, its edges are the four sides of the rectangle, and the middle section of the edge refers to the area excluding the four corners of the rectangle; similarly, when the electrochromic film 10 is a triangle, its edges are the three sides of the triangle, and the middle section refers to the area excluding the three corners.

[0062] Of course, the specific location of the middle section can be adjusted based on actual needs. For example, if the electrochromic film has multiple edges, the middle section may only be located at the corresponding position of one or more of the edges of the electrochromic film. In addition, the length of the middle section can also be adjusted. For example, the ends of the middle section may be moved closer to the corners of the electrochromic film to form a longer middle section, or the ends of the middle section may be moved further away from the corners of the electrochromic film to form a shorter middle section.

[0063] In some embodiments, the middle portion 102 of the edge of the electrochromic film 10 may correspond to the portion of the edge of the electrochromic film where wrinkles appear or where wrinkles are more severe. In other embodiments, the middle portion 102 of the edge of the electrochromic film 10 may correspond to all areas of the edge of the electrochromic film other than the corner areas.

[0064] In an embodiment of the present application, the local area of ​​the edge of the electrochromic film 10 includes the middle section 102 of the edge of the electrochromic film 10; and / or, a recessed area 101 is formed on the edge of the electrochromic film 10, and the local area of ​​the edge of the electrochromic film 10 includes the recessed area 101.

[0065] That is, in some embodiments, as shown in FIG. 6 , the local area of ​​the edge of the electrochromic film 10 includes the middle section 102 of the edge of the electrochromic film 10 .

[0066] In other embodiments, a recessed area 101 is formed at the edge of the electrochromic film 10, and a local area of ​​the edge of the electrochromic film 10 includes the recessed area 101. The so-called recessed area 101 here can be formed by the edge of the electrochromic film being concave toward the center of the electrochromic film, or can be formed by the edge of the electrochromic film being partially cut.

[0067] Among them, the recessed area 101 can be located only in the middle section 102 of the edge of the electrochromic film 10, or only in the corner area of ​​the edge of the electrochromic film 10, or as shown in Figures 5 and 6, the recessed area 101 can be located at both the middle section 102 and the corner area of ​​the edge of the electrochromic film 10. The area where wrinkles appear or become more serious may appear simultaneously in the recessed area 101 and the middle section 102 of the edge of the electrochromic film 10. Therefore, at this time, the local area of ​​the electrochromic film 10 can include both the recessed area 101 and the middle section 102 of the edge of the electrochromic film 10. In this way, the wrinkles generated at the edge of the electrochromic film can be more effectively alleviated or eliminated, and the overall aesthetics of the electrochromic film can be more effectively improved.

[0068] In application, in order to adapt to curved glass of different curvatures and shapes or for the needs of structural design, a recessed area 101 is formed at the edge of the electrochromic film 10. Usually, the recessed area 101 is located in the middle section 102 and / or corner position of the edge of the electrochromic film 10.

[0069] In some embodiments, the first groove 110 is located on a side of the electrochromic film 10 close to the first conductive base layer 11, and the second groove 130 is located on a side of the electrochromic film 10 close to the second conductive base layer 13. In other embodiments, the positions of the first groove 110 and the second groove 130 can be interchanged, and similarly, the positions of the first conductive area 111 and the second conductive area 131 formed therefrom can also be interchanged.

[0070] In the embodiment of the present application, as shown in Figures 1 to 3, the edge of the electrochromic film 10 has a first groove 110 and a second groove 130. This provides the electrochromic film 10 with the required space margin for bending during bending, thereby greatly reducing or avoiding wrinkles at the edge of the electrochromic film 10, thereby improving the aesthetics of the electrochromic film 10. In some embodiments, part of the first groove 110 and part of the second groove 130 overlap to form an insulating region 100. Such a configuration can minimize the proportion of uncut areas at the edge of the electrochromic film 10, thereby reducing the generation of wrinkles. Moreover, by further limiting the width a of the first conductive area 111 and the second conductive area 131 to be less than or equal to the width b of the insulating area 100, during the bending process of the electrochromic film 10, the first conductive area 111 and the second conductive area 131 with larger widths can provide it with sufficient space margin required for bending, or the insulating area 100 with smaller widths can reduce the amount of wrinkles generated, that is, the first conductive area 111 and the second conductive area 131 at the edge of the electrochromic film 10 have a relatively high proportion, so as to fully and effectively release the stress generated at the edge of the electrochromic film 10 through the first groove 110 and the second groove 130, thereby reducing the degree of wrinkles in the local area, or even avoiding the generation of wrinkles in the local area, thereby improving the aesthetics of the appearance of the electrochromic film 10, preventing the electrochromic film 10 from falling off or affecting the color changing performance due to wrinkles, and improving the user's visual experience. In addition, the first conductive area 111 and the second conductive area 131 are distributed on both sides of the electrochromic film 10, which can effectively alleviate the generation of wrinkles on both sides of the electrochromic film 10, further improve the aesthetics, and thus enhance the user's visual experience.

[0071] In some embodiments, as shown in Figures 1 to 3, the number of the first groove 110 and the second groove 130 can be multiple, and multiple first conductive areas 111, second conductive areas 131 and insulating areas 100 are formed, which can further alleviate the generation of wrinkles. Moreover, through the coordination of multiple first grooves and second grooves, multiple coordinated first conductive areas and second conductive areas can be formed, so that when current or voltage is introduced from the outside, the current or voltage distribution formed on the first conductive layer and the second conductive layer is more uniform, so that the electric field formed on both sides of the electrochromic stack layer is more uniform, thereby improving the uniformity of color change of the electrochromic film.

[0072] In the embodiment of the present application, the width of the first conductive area 111 and the width of the second conductive area 131 are both a, which means that the width of the first conductive area 111 and the width of the second conductive area 131 are respectively a, and a refers to a range value. It represents that the width of the first conductive area 111 and the width of the second conductive area 131 are both within the range a, and in a specific embodiment, the width of the first conductive area 111 and the width of the second conductive area 131 can be the same or different. Similarly, the width of the insulating area 100 is b, where b is also a range value. The width b of the insulating area 100 in the same embodiment can be the same value or different values. For example, the lengths of different sides of the electrochromic film 10 are different, and the value requirements for a and b are also different. Therefore, a and b in the same electrochromic film 10 can also correspond to multiple values.

[0073] It should be noted that the definition of width among the width of the first conductive area 111, the width of the second conductive area 131 and the width of the insulating area 100 is as shown in Figure 3. Taking one side of the electrochromic film 10 as an example, a first groove 110 and a second groove 130 are opened in a direction parallel to the side edge, and the first groove 110 and the second groove 130 overlap to form the insulating area 100; the distance from the end of the first groove 110 away from the insulating area 100 to the insulating area 100 is the width of the first conductive area 111. Similarly, the width of the second conductive area 131 is the distance from the end of the second groove 130 away from the insulating area 100 to the insulating area 100. The width of the insulating area 100 is the width of the overlapping part of the first groove 110 and the second groove 130.

[0074] In some embodiments, as shown in Figure 4, the electrochromic film 10 includes a first conductive substrate layer 11, an electrochromic stack layer 12 and a second conductive substrate layer 13; the first conductive substrate layer 11 includes a first conductive layer 112 and a first substrate layer 113, the second conductive substrate layer 13 includes a second conductive layer 132 and a second substrate layer 133, and the electrochromic stack layer 12 includes an electrochromic layer 121, an electrolyte layer 122 and an ion storage layer 123 stacked in sequence; wherein the first conductive layer 112 is stacked on the electrochromic layer 121, and the first substrate layer 113 is stacked on the first conductive layer 112; the second conductive layer 132 is stacked on the ion storage layer 123, the second substrate layer 133 is stacked on the second conductive layer 132, and the electrolyte layer 122 is located between the electrochromic layer 121 and the ion storage layer 123. In other embodiments, the second conductive layer 132 may be further stacked on the electrochromic layer 121 , and the first conductive layer 112 may be further stacked on the ion storage layer 123 .

[0075] It should be noted that the first conductive layer 112 and the second conductive layer 132 are each connected to an external power source. By connecting the first conductive layer 112 and the second conductive layer 132 to the external power source, an external electric field is formed between the first conductive layer 112 and the second conductive layer 132, causing the electrochromic stack 12 to undergo a stable and reversible color change under the action of the external electric field.

[0076] In some embodiments, as shown in Figures 1 to 3, 5, and 6, the width of the first conductive region 111, the width a of the second conductive region 131, and the width b of the insulating region 100 outside the localized edge region of the electrochromic film 10 satisfy the following relationship: b ≤ a. This reduces or prevents wrinkles in areas of the electrochromic film 10 other than the localized edge region, further enhancing the overall aesthetics of the electrochromic film 10. Furthermore, by ensuring that b ≤ a is satisfied in all areas of the edge of the electrochromic film 10, for example, by ensuring that the values ​​of a and b remain consistent across all areas, the fabrication process for the first and second grooves 110 and 130 can be simplified, improving the processing efficiency of the electrochromic film 10 and reducing time costs.

[0077] In other embodiments, the width of the first conductive region 111, the width a of the second conductive region 131, and the width b of the insulating region 100 outside the localized edge region of the electrochromic film 10 satisfy the following relationship: b>a. Typically, wrinkles are less likely to occur or are less severe in portions of the electrochromic film 10 outside the localized edge region, and thus b≤a need not be satisfied. For example, b>a can be satisfied. Thus, by increasing the value of b, the likelihood of electrical connection between the first conductive region 111 and the second conductive region 131 can be further reduced, particularly the likelihood of a short circuit electrical connection within the insulating region 100, thereby improving the safety and reliability of the electrochromic film 10. Furthermore, the values ​​of a and b can be diversified according to actual needs to improve the applicability of the electrochromic film 10.

[0078] In some embodiments, the width b of the insulating region 100 located in a localized area at the edge of the electrochromic film 10 is in the range of b ≥ 0. The width of the insulating region 100 can be 0, meaning that one end of the first groove 110 coincides with one end of the second groove 130, with the overlapping region forming a single line. This minimizes the proportion of uncut areas at the edge of the electrochromic film 10, thereby reducing the risk of wrinkles at the edge of the electrochromic film 10.

[0079] In other embodiments, the width b of the insulating region 100 located in a localized area at the edge of the electrochromic film 10 is in the range of b ≤ 30 mm. Controlling the width of the insulating region 100 helps prevent a short circuit between the first conductive layer 112 and the second conductive layer 132. If the width of the insulating region 100 is too large, a large amount of insulating material is required to fill the insulating region 100, resulting in a waste of resources. Typically, although the insulating region 100 is a cut portion, to prevent a short circuit between the first conductive region 111 and the second conductive region 131, an insulating adhesive is usually provided in the insulating region 100, thereby transforming it from a cut region into an "uncut region" of the electrochromic film 10. When the spacing is too large, the wrinkles generated are more obvious and are not easily released by the first groove 110 and the second groove 130. When the spacing is too small, electrical connection between the insulating regions 100 is easily caused by squeezing, and even a short circuit occurs, which is not conducive to controlling the color change process of the electrochromic film 10. Therefore, by making the width b of the insulating area 100 within a certain range, it can be more conducive to alleviating the wrinkles on the edge of the electrochromic film 10, or it can avoid the occurrence of electrical connection between the first conductive area 111 and the second conductive area 131. It can even be conducive to alleviating the wrinkles on the edge of the electrochromic film 10 and avoiding the occurrence of electrical connection between the first conductive area 111 and the second conductive area 131.

[0080] In other embodiments, the value range of the width b of the insulating area 100 located in the local area of ​​the edge of the electrochromic film 10 is: 0≤b≤30mm. In other embodiments, the value range of the width b of the insulating area 100 located in the local area of ​​the edge of the electrochromic film 10 may also be: 5≤b≤30mm, 5≤b≤25mm, 5≤b≤20mm, 5≤b≤15mm, 5≤b≤10mm, 10≤b≤30mm, 10≤b≤25mm, 10≤b≤20mm, 10≤b≤15mm, 15≤b≤30mm, 15≤b≤25mm, 15≤b≤20mm, 20≤b≤30mm, 20≤b≤25mm and 25≤b≤30mm.

[0081] In some embodiments, the width b of the insulating region 100 located in a localized edge region of the electrochromic film 10 is in the range of 2 mm ≤ b ≤ 15 mm. In other embodiments, the width b of the insulating region 100 located in a localized edge region of the electrochromic film 10 may be in the range of 3 mm ≤ b ≤ 14 mm, 5 mm ≤ b ≤ 13 mm, 6 mm ≤ b ≤ 12 mm, 7 mm ≤ b ≤ 11 mm, 8 mm ≤ b ≤ 10 mm, or any other range.

[0082] In some embodiments, the ratio of the width a of the first conductive region 111 and the second conductive region 131 located in a localized area at the edge of the electrochromic film 10 to the width b of the insulating region 100 located in a localized area at the edge of the electrochromic film 10 satisfies the following relationship: 5 ≤ a / b. This further reduces the proportion of the insulating region 100 width, allowing the first conductive region 111 and the second conductive region 131 at the edge of the electrochromic film 10 to occupy a relatively higher proportion. This allows the first grooves 110 and the second grooves 130 to more effectively release stress generated at the edge of the electrochromic film 10, thereby reducing the degree of wrinkling in the localized area and even preventing the formation of wrinkles in the localized area. This further improves the aesthetics of the electrochromic film 10, prevents the electrochromic film 10 from falling off or affecting its color-changing performance due to wrinkles, and further enhances the user's visual experience.

[0083] In some embodiments, the ratio of the width a of the first conductive region 111 and the second conductive region 131 located in the local area of ​​the edge of the electrochromic film 10 to the width b of the insulating region 100 located in the local area of ​​the edge of the electrochromic film 10 satisfies the following relationship: 5≤a / b≤50; and the sum of the width a of the first conductive region 111 and the second conductive region 131 located in the local area of ​​the edge of the electrochromic film 10 and the width b of the insulating region 100 located in the local area of ​​the edge of the electrochromic film 10 satisfies the following relationship: 60mm≤a+b≤750mm.

[0084] Generally, the purpose of setting the first groove 110 and the second groove 130 at the edge 10 of the electrochromic film is to introduce external current or voltage to the first conductive base layer 11 and the second conductive base layer 13, so as to form an electric field on both sides of the electrochromic stack layer 12, driving the ions or electrons in the electrochromic stack layer 12 to move, so as to adjust the color or transmittance of the electrochromic film 10. The more first conductive areas 111 and second conductive areas 131 there are and the more uniform their distribution is, the more uniform the color change rate or transmittance change rate of the electrochromic film 10 will be; and the length of the edge of the electrochromic film 10 is limited. When the width of a single first conductive area 111 or second conductive area 131 is too large, it is not conducive to forming multiple first conductive areas 111 or second conductive areas 131 at the edge of the electrochromic film 10. Therefore, by limiting the values ​​of a and b in the local area to 5≤a / b≤50, or / and 60mm≤a+b≤750mm, it can not only alleviate or eliminate the wrinkles in the local area, but also facilitate the uniform arrangement of multiple first conductive areas 111, second conductive areas 131 and insulating areas 100, so as to improve the aesthetics of the electrochromic film 10 while ensuring the color change uniformity of the electrochromic film 10, so as to further enhance the user experience.

[0085] In other embodiments, the width a of the first conductive area 111 and the second conductive area 131 located in the local area of ​​the edge of the electrochromic film 10 and the width b of the insulating area 100 located in the local area of ​​the edge of the electrochromic film 10 may also be in the range of 5≤a / b≤45, 5≤a / b≤40, 5≤a / b≤35, 5≤a / b≤30, 5≤a / b≤25, 5≤a / b≤20, 5≤a / b≤50, 5≤a / b≤15, 5≤a / b≤10, 10≤a / b≤50, 10≤a / b≤45, 10≤a / b≤40, 10≤a / b≤35, 10≤a / b≤30, 10≤a / b≤25, 10≤a / b≤20, 10≤a / b≤15, 15≤a / b≤50, 15≤a / b ≤45, 15≤a / b≤40, 15≤a / b≤35, 15≤a / b≤30, 15≤a / b≤25, 15≤a / b≤20, 20≤a / b≤50, 20≤a / b≤45, 20≤a / b≤40, 20≤a / b≤35, 20≤a / b≤30, 20≤a / b≤25, 25≤a / b≤50, 25≤a / b≤45, 2 Any interval among 5≤a / b≤40, 25≤a / b≤35, 25≤a / b≤30, 30≤a / b≤50, 30≤a / b≤45, 30≤a / b≤40, 30≤a / b≤35, 35≤a / b≤50, 35≤a / b≤45, 35≤a / b≤40, 40≤a / b≤50, 40≤a / b≤45 and 45≤a / b≤50;The value range of a+b can also be: 70mm≤a+b≤750mm, 80mm≤a+b≤750mm, 90mm≤a+b≤750mm, 100mm≤a+b≤750mm, 150mm≤a+b≤750mm, 150mm≤a+b≤700mm, 150mm≤a+b≤650mm, 150mm≤a+b≤600mm, 150mm≤a+b≤550mm, 150mm≤a+ b≤500mm、150mm≤a+b≤450mm、150mm≤a+b≤400mm、150mm≤a+b≤350mm、150mm≤a+b≤300mm、150mm≤a+b≤250mm、150mm≤a+b≤200mm、200mm≤a+b≤750mm、200mm≤a+b≤700mm、200mm≤a+b≤650mm、200mm≤a+b≤ 600mm, 200mm≤a+b≤550mm, 200mm≤a+b≤500mm, 200mm≤a+b≤450mm, 200mm≤a+b≤400mm, 2 00mm≤a+b≤350mm, 200mm≤a+b≤300mm, 200mm≤a+b≤250mm, 250mm≤a+b≤750mm, 300mm≤a+ Any interval among b≤750mm, 350mm≤a+b≤750mm, 400mm≤a+b≤750mm, 450mm≤a+b≤750mm, 500mm≤a+b≤750mm, 550mm≤a+b≤750mm, 600mm≤a+b≤750mm, 650mm≤a+b≤750mm and 700mm≤a+b≤750mm.

[0086] It will be understood that the above-described relationship between a and b, as well as the ranges of a and b, are limited to: a being the width of the first conductive region 111 and the second conductive region 131 located in the local area of ​​the edge of the electrochromic film 10, and b being the width of the insulating region 100 located in the local area of ​​the edge of the electrochromic film 10. However, depending on actual needs, the width a of the first conductive region 111 and the second conductive region 131 located outside the local area of ​​the edge of the electrochromic film 10, and the width b of the insulating region 100 located outside the local area of ​​the edge of the electrochromic film 10, may also satisfy the above-described relationship between a and b, as well as the ranges of a and b.

[0087] In some embodiments, the thickness of the first conductive substrate layer 11 is greater than or equal to 120 μm. In other embodiments, the thickness of the second conductive substrate layer 13 is greater than or equal to 120 μm. In other embodiments, the thickness of the first conductive substrate layer 11 and the second conductive substrate layer 13 are both greater than or equal to 120 μm. Specifically, the first conductive substrate layer 11 and the second conductive substrate layer 13 can also be greater than 150 μm, for example, 125 μm, 140 μm, 160 μm, 188 μm and 200 μm, etc. The thicker the thickness of the first conductive substrate layer 11 and the second conductive substrate layer 13, the larger the space of the first groove 110 and the second groove 130 along the thickness direction of the electrochromic film, thereby providing sufficient space for the edge of the electrochromic film 10 to stretch, thereby slowing down the generation of wrinkles.

[0088] Table 1: Values ​​of the width a of the first conductive area 111 and the second conductive area 131, the width b of the insulating area 100, and the variation of the wrinkle depth of the electrochromic film 10

[0089] It should be noted that in Table 1, the thickness of the first conductive base layer 11 and the thickness of the second conductive base layer 13 are both 188 μm.

[0090] As shown in Table 1, where b>a and b>30mm, in Comparative Examples 1 to 3, the width a of the first conductive area 111 and the second conductive area 131 is 50mm, while the width a of the insulating area 100 decreases from 80mm to 60mm, and the wrinkle depth decreases from 56mm to 48mm. Although the wrinkle depth can be reduced by reducing b when a=50mm remains unchanged, the final wrinkle depth is still relatively large, affecting the aesthetics and visual experience. Examples 1 to 6 show that when b≤a and 1mm≤b≤30mm, the wrinkle depth is less than the values ​​in Comparative Examples 1 to 3.

[0091] In Examples 1 to 6, the width a of the first conductive region 111 and the second conductive region 131 is 88 mm, and the width b of the insulating region 100 decreases from 30 mm to 5 mm. The wrinkle depth also decreases from 40 mm in Example 1 to 19 mm in Example 6, significantly improving the wrinkle depth. It can be seen that in the examples shown in Table 1, as b changes, the wrinkle depth of the electrochromic film 10 is less than that of the electrochromic film 10 in the comparative example. That is, in the examples shown in Table 1, when a = 88 mm, reducing the value of b can significantly improve the wrinkle depth of the electrochromic film 10.

[0092] A careful examination of the data from Examples 1 to 5 reveals that when a = 88 mm and b gradually decreases, the wrinkle depth decreases from 40 mm to 21 mm, a significant reduction that demonstrates a more pronounced improvement in wrinkle depth. However, in Examples 5 and 6, when a = 88 mm and b changes from 8 mm to 5 mm, the wrinkle depth decreases from 21 mm to 19 mm, a change that is less pronounced than in Examples 1 to 5. This indicates that, when b is no greater than 8 mm, decreasing b does not significantly improve the wrinkle depth of the electrochromic film 10.

[0093] When a = 88 mm and 5 mm ≤ b ≤ 8 mm, the wrinkle depth of the electrochromic film 10 is best improved. That is, when the thickness of the first conductive substrate layer 11 and the thickness of the second conductive substrate layer 13 are both 188 μm, and a = 88 mm and 5 mm ≤ b ≤ 8 mm, the wrinkle depth of the electrochromic film 10 is best improved.

[0094] In some embodiments, a = 88 mm, and b = 8 mm. As can be seen from Table 1, when the thickness of the first conductive substrate layer and the thickness of the second conductive substrate layer are both 188 μm, b = 8 mm, and a = 88 mm, the wrinkles in the local area of ​​the edge of the electrochromic film 10 can be alleviated or eliminated more effectively, and it is also beneficial to the uniform arrangement of the multiple first grooves 110 or the second grooves 130 (i.e., the first conductive area 111, the second conductive area 131, and the insulating area 100) at the edge of the electrochromic film 10, thereby improving the color change uniformity of the electrochromic film, thereby fully enhancing the user experience.

[0095] Table 2: Thickness of the first conductive base layer 11 and the second conductive base layer 13 and the change in wrinkle depth of the electrochromic film 10

[0096] It should be noted that in Table 2, the width of the first conductive region 111 and the width of the second conductive region 131 are both 88 mm, ie, a=88 mm, and the width of the insulating region 100 is 8 mm, ie, b=8 mm.

[0097] As shown in Table 2, in Comparative Examples 1 to 3, when the thickness of the first conductive substrate layer 11 and the second conductive substrate layer 13 was limited to a range of less than 120 μm, the wrinkle depth was reduced from 130 mm to 125 mm and then to 120 mm by increasing the thickness from 60 μm to 80 μm and then to 100 μm. In other words, increasing the thickness of the first conductive substrate layer 11 and the second conductive substrate layer 13 can also reduce the wrinkle depth to a certain extent. However, within the thickness range of less than 120 μm, the wrinkle improvement effect is not particularly significant. In contrast, Examples 1 to 5 show that when the thickness of the first conductive substrate layer 11 or the second conductive substrate layer 13 is ≥ 120 μm, the wrinkle depth is much smaller than that in Comparative Examples 1 to 3.

[0098] Therefore, Examples 1 to 3 show that when the thickness of the first conductive substrate layer 11 or the second conductive substrate layer 13 is ≥120μm and increases from 125μm to 150μm and 188μm, the wrinkle depth decreases from 110mm to 60mm and 21mm respectively; the wrinkle depth decreases by 50mm and 89mm respectively. It can be seen that when the thickness of the first conductive substrate layer 11 or the second conductive substrate layer 13 is ≥120μm and ≤188μm, the improvement in wrinkles is large and the improvement effect is good. Examples 3 to 5 show that when the thickness of the first conductive substrate layer 11 or the second conductive substrate layer 13 increases from 180μm to 250μm and then to 400μm, the wrinkle depth only decreases from 21mm to 18mm and to less than 15mm; the difference in wrinkle depth is only 3mm and 6mm. By comparison, it can be seen that when the thickness of the first conductive base layer 11 or the second conductive base layer 13 is ≥188 μm, the depth of the wrinkles does not change significantly by increasing the thickness.

[0099] In some embodiments, as shown in Table 2, when a=88 mm, b=8 mm, and the thickness of the first conductive substrate layer 11 and the thickness of the second conductive substrate layer 13 are 188 μm respectively, the wrinkle depth improvement effect of the electrochromic film 10 is best.

[0100] In some embodiments, as shown in Figures 1 to 3, the depth of the first conductive region 111 and the depth of the second conductive region 131 are both h, where 0mm<h≤100mm. The greater the depth of the first conductive region 111 and the second conductive region 131, the greater the width of the electrochromic stack 12 whose edges are removed by cutting, resulting in a reduction in the area of ​​the electrochromic stack 12 and, consequently, a reduction in the color-changing area of ​​the electrochromic film 10. Therefore, by limiting the depth of the first conductive region 111 and the depth of the second conductive region 131 to within the aforementioned range, the color-changing area of ​​the electrochromic film 10 can be ensured to be sufficiently large.

[0101] It should be noted that the depth h of the first conductive region 111 is shown in FIG1 , i.e., the distance the first conductive region 111 extends from the edge of the electrochromic film 10 toward the center of the electrochromic film 10. Similarly, the depth h of the second conductive region 131 is the distance the second conductive region 131 extends from the edge of the electrochromic film 10 toward the center of the electrochromic film 10.

[0102] In the embodiment of the present application, the value of h is within a range, that is, in some embodiments, the depths of the first conductive region 111 and the second conductive region 131 may be the same or different, as long as they are within the range of 0 mm < h ≤ 100 mm.

[0103] In other embodiments, the value range of h may also be: 10mm<h≤100mm, 20mm<h≤100mm, 30mm<h≤100mm, 40mm<h≤100mm, 50mm<h≤100mm, 60mm<h≤100mm, 70mm<h≤100mm, 80mm<h≤100mm, 90mm<h≤100mm, 0<h≤90mm, 10mm<h≤90mm, 20mm<h≤90 mm, 30mm<h≤90mm, 40mm<h≤90mm, 50mm<h≤90mm, 60mm<h≤90mm, 70mm<h≤90mm, 80mm<h≤90mm, 0<h≤80mm , 10mm<h≤80mm, 20mm<h≤80mm, 30mm<h≤80mm, 40mm<h≤80mm, 50mm<h≤80mm, 60mm<h≤80mm, 70mm<h≤80mm , 0<h≤70mm, 10mm<h≤70mm, 20mm<h≤70mm, 30mm<h≤70mm, 40mm<h≤70mm, 50mm<h≤70mm, 60mm<h≤70mm, 0 <h≤60mm, 10mm<h≤60mm, 20mm<h≤60mm, 30mm<h≤60mm, 40mm<h≤60mm, 50mm<h≤60mm, 0<h≤50mm, 10mm<h≤ Any range among 50mm, 20mm<h≤50mm, 30mm<h≤50mm, 40mm<h≤50mm, 0<h≤40mm, 10mm<h≤40mm, 20mm<h≤40mm, 30mm<h≤40mm, 0<h≤30mm, 10mm<h≤30mm, 20mm<h≤30mm, 0<h≤20mm, 10mm<h≤20mm and 0<h≤10mm can be specifically limited according to actual conditions.

[0104] In some embodiments, as shown in FIG7 , a first bus bar 14 is provided on the edge of the first conductive substrate layer 11 away from the electrochromic stack layer 12. Part of the first bus bar 14 extends into the first conductive region 111 and adheres to the side of the second conductive substrate layer 13 near the electrochromic stack layer 12, thereby electrically connecting to the second conductive substrate layer 13. In other embodiments, a second bus bar 15 is provided on the edge of the second conductive substrate layer 13 away from the electrochromic stack layer 12. Part of the second bus bar 15 extends into the second conductive region 131 and adheres to the side of the first conductive substrate layer 11 near the electrochromic stack layer 12, thereby electrically connecting to the first conductive substrate layer 11. Thus, by forming an electrical connection with the second conductive base layer 12 through the first bus bar 14, external current or voltage can be quickly introduced into the second conductive base layer 12 through the first bus bar 14, and by forming an electrical connection with the first conductive base layer 11 through the second bus bar 15, external current and voltage can be quickly introduced into the first conductive base layer 11 through the second bus bar 15, thereby increasing the speed at which the external current or voltage is conducted to the first conductive base layer 11 and the second conductive base layer 12, thereby increasing the color change speed or transmittance change speed of the electrochromic film 10.

[0105] Specifically, the first bus bar 14 is disposed along the outer side of the first conductive substrate 11 and the side of the second conductive substrate 13 close to the first groove 110 . The second bus bar 15 is disposed along the outer side of the second conductive substrate 13 and the side of the first conductive substrate 11 close to the second groove 130 .

[0106] In application, Figure 7 shows the structure of one edge of the electrochromic film 10. In fact, in order to improve the conduction speed, in our actual application, the four edges of the electrochromic film 10 can be provided with the same form of first bus bar 14 and second bus bar 15; in special cases, when some edges are narrow and difficult to set or based on other design requirements, the first bus bar 14 and / or the second bus bar 15 may not be arranged.

[0107] It should be noted that by providing multiple first conductive areas 111 and multiple second conductive areas 131 at the edge of the electrochromic film 10, the electrical connection points of the electrochromic film 10 can be more evenly distributed, thereby improving the uniformity of electrical conduction to the first conductive base layer 11 and the second conductive base layer 13. By connecting the first bus bar 14 and the second bus bar 15 to an external power source, an external electric field is formed between the first conductive layer 112 and the second conductive layer 132, thereby improving the color change efficiency and stability of the electrochromic film 10.

[0108] In some embodiments, as shown in FIG8 , insulating adhesive 16 is provided within insulating region 100 to separate first bus bar 14 from second bus bar 15 . Specifically, insulating adhesive 16 is high-temperature resistant. The provision of insulating adhesive effectively prevents electrical contact between the first and second bus bars, thereby effectively preventing short circuits between the first and second conductive regions.

[0109] In the embodiment of the present application, there are no particular limitations on the width and thickness of the insulating adhesive 16. In some embodiments, the width of the insulating adhesive 16 can be smaller than or equal to the width of the insulating region 100. This allows for more convenient formation of the insulating adhesive within the insulating region to separate the first and second busbars, preventing short circuits in the electrochromic film.

[0110] In other embodiments, along the stacking direction of the first conductive base layer 11, the electrochromic stacked layer 12, and the second conductive base layer 13, the sum of the thicknesses of the first conductive base layer 11, the electrochromic stacked layer 12, and the second conductive base layer 13 is less than or equal to the thickness of the insulating adhesive 16. Thus, by increasing the thickness of the insulating adhesive, electrical connection between the first bus bar and the second bus bar can be more effectively prevented, preventing the occurrence of short circuits and other conditions, thereby improving the safety and reliability of the electrochromic film.

[0111] In some further embodiments, along the stacking direction of the first conductive base layer 11, the electrochromic stacked layer 12, and the second conductive base layer 13, the sum of the thicknesses of the first conductive base layer 11, the electrochromic stacked layer 12, and the second conductive base layer 13 is greater than the thickness of the insulating adhesive 16. Thus, by further limiting the sum of the thicknesses of the first conductive base layer, the electrochromic stacked layer, and the second conductive base layer to be greater than the thickness of the insulating adhesive in the stacking direction of the electrochromic film, i.e., by making the insulating adhesive thinner, the thickness of the stacked first bus bar, the insulating adhesive, and the second bus bar can be reduced, i.e., the thickness of the edge of the electrochromic film can be reduced, thereby facilitating subsequent processing of the electrochromic film. For example, it can prevent the stacking of the first bus bar, the insulating adhesive, and the second bus bar from being subjected to excessive extrusion pressure, which could lead to damage or an extrusion short circuit, thereby further improving the stability and reliability of the electrochromic film.

[0112] As shown in FIG7 , in some embodiments, the first busbar 14 is arranged at an angle within the insulating region. In other embodiments, the second busbar 15 is arranged at an angle within the insulating region. This allows the first busbar 14 and / or the second busbar 15 to pass through the insulating region 100 at an angle, thereby requiring less insulating adhesive 16 to be filled within the insulating region 100, thereby isolating the first busbar 14 and the second busbar 15 and preventing short circuits.

[0113] It is worth noting that only the parallelogram-shaped area of ​​the originally rectangular insulating region 100 is filled with insulating adhesive 16, leaving the corners of the insulating region 100 empty. This increases the space between the first conductive region 111 and the second conductive region 131, further increasing the margin for bending the edges of the electrochromic film 10, ultimately achieving the effect of reducing the depth of wrinkles or reducing the occurrence of wrinkles. Specifically, the first busbar 14 and the second busbar 15 are copper foil.

[0114] The above only shows the structure of one side of the electrochromic film 10 . In application, the other sides of the electrochromic layer 121 have the same structure, as shown in FIG. 9 .

[0115] In some embodiments, as shown in Figures 10 to 12, first grooves 110 and second grooves 130 are alternately distributed along the edge of the electrochromic film 10, forming alternating first conductive areas 111 and second conductive areas 131. This effectively reduces the proportion of uncut areas along the edge of the electrochromic film 10, thereby reducing the generation of wrinkles.

[0116] In some embodiments, as shown in Figures 1 to 3 and Figures 10 to 12, a portion of any first groove 110 overlaps with a portion of the second groove 130 adjacent to the first groove 110 to form an insulating region 100, and another portion of the second groove 130 overlaps with another first groove 110 adjacent thereto to form another insulating region 100.

[0117] Specifically, the width of a first groove 110 is equal to the width of a first conductive region 111 plus the width of an insulating region 100, and the width of a second groove 130 is equal to the width of a second conductive region 131 plus the width of two insulating regions 100; alternatively, the width of a first groove 110 is equal to the width of a first conductive region 111 plus the width of two insulating regions 100, and the width of a second groove 130 is equal to the width of a second conductive region 131 plus the width of one insulating region 100. In this way, the edge of the electrochromic film 10 forms an arrangement of the first conductive region 111, the insulating region 100, the second conductive region 131, the insulating region 100, and the first conductive region 111. That is, there is no gap between the first groove 110 and the second groove 130, further reducing the area where wrinkles are generated.

[0118] In other embodiments, as shown in Figures 13 to 15, a portion of any first groove 110 overlaps with a portion of a second groove 130 adjacent to the first groove 110 to form an insulating region 100, and another portion of the second groove 130 is spaced apart from another adjacent first groove 110, wherein a first uncut region is formed between the second groove 130 and the other first groove 110. In other embodiments, of course, a portion of any second groove 130 overlaps with a portion of the first groove 110 adjacent to the second groove 130 to form an insulating region 100, and another portion of the first groove 110 is spaced apart from another adjacent second groove 130, wherein a second uncut region is formed between the first groove 110 and the other second groove 130. The widths of both the first uncut region and the second uncut region are c.

[0119] In the embodiment of the present application, the width c of the first uncut area and the second uncut area has the same value range as the value range of b. In some embodiments, the width c of the first uncut area and the second uncut area located in the local area at the edge of the electrochromic film 10 and the width a of the first conductive area and the second conductive area located in the local area at the edge of the electrochromic film 10 satisfy the following relationship: c ≤ a. In other embodiments, the relationship between c and a can be equivalent to the relationship between b and a, that is, the value of c can be the same as that of b.

[0120] In some embodiments, the spacing c can be the spacing between the first groove 110 and the second groove 130, or the spacing between the first groove 110 or the second groove 130 and the end of the edge of the electrochromic film 10, as shown in Figures 11 and 14. In this way, the proportion of the uncut area of ​​the electrochromic film 10 (i.e., the spacing c and the insulating area after filling with insulating material) can be minimized, thereby reducing the generation of wrinkles; the space between the first conductive area 111 and the second conductive area 131 is increased, providing the electrochromic film 10 with sufficient space margin for bending and stretching, thereby achieving the effect of reducing the depth of wrinkles.

[0121] Specifically, the width of a first groove 110 is equal to the width of a first conductive region 111 plus the width of an insulating region 100 , and the width of a second groove 130 is equal to the width of a second conductive region 131 plus the width of an insulating region 100 .

[0122] In some embodiments, as shown in FIG16 , the height of the electrochromic film 10 along the first direction is H1, and the height of the electrochromic film 10 along the second direction is H2, wherein the first direction and the second direction are perpendicular to each other, and the product of H1 and H2 satisfies the following relationship: H1×H2≤2500mm 2 / m 4 . Certain restrictions are placed on the arch heights H1 and H2 of the electrochromic film 10 to make the wrinkle relief effect more obvious. Among them, the degree of curvature of different parts of the electrochromic film 10 is different (that is, they have different curvatures) to correspond to different arch heights. The greater the arch height of the electrochromic film 10, the greater the possibility of wrinkles on its edges, or the more serious the wrinkles formed on its edges (deeper wrinkles or more wrinkles, etc.). Therefore, by limiting the arch height of the electrochromic film 10 to a certain range, it can further alleviate the wrinkles on the edges of the electrochromic film 10, thereby further improving the aesthetics of the appearance of the electrochromic film 10.

[0123] It should be noted that the first direction is the X direction in Figure 16, and the second direction is the Y direction in Figure 16. The depth of the edge wrinkles varies depending on the degree of curvature of the electrochromic film 10 in different areas. The experimental data results are based on the average arch height of the electrochromic film 10 meeting the requirement of H1×H2≤2500mm. 2 / m 4 Conditions are prerequisites.

[0124] An embodiment of the present application further provides an electrochromic device, comprising a substrate layer and the electrochromic film 10 as described above, wherein the substrate layer and the electrochromic film 10 are stacked.

[0125] As shown in Figure 17, the substrate layer includes at least two layers, and the electrochromic film 10 is disposed between the at least two substrate layers. In some embodiments, the substrate layer is a glass layer 20. Thus, by providing at least two substrate layers, the electrochromic film 10 can be placed between the substrate layers, thereby providing a more comprehensive and effective support or protection for the electrochromic film 10. Furthermore, by providing the substrate layer as a glass layer 20, sufficient rigidity can be ensured for the electrochromic device to prevent deformation, thereby better protecting or supporting the electrochromic film 10.

[0126] Specifically, FIG17 shows a schematic diagram of the electrochromic film 10 applied to curved glass; in other embodiments, the electrochromic film 10 can also be applied to flat glass.

[0127] The present application also provides an end product including the electrochromic film 10 or electrochromic device described above. The end product includes any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, an electronic product housing, eyeglasses, a vehicle, and a display panel. Because the end product includes the electrochromic film 10, wrinkles in the end product can be effectively alleviated or eliminated, thereby improving the aesthetics of the end product and enhancing the user's visual experience.

[0128] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0129] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An electrochromic film, characterized in that: It includes a first conductive substrate layer, an electrochromic stack layer and a second conductive substrate layer stacked in sequence; A first groove is formed at an edge of the first conductive substrate layer, and the first groove penetrates the first conductive substrate layer and the electrochromic stack layer; A second groove is formed at an edge of the second conductive base layer, and the second groove penetrates the second conductive base layer and the electrochromic stack layer; A partial area of ​​the first groove and a partial area of ​​the second groove overlap at the electrochromic stack layer to form an insulating area, and the insulating area penetrates the first conductive substrate layer, the electrochromic stack layer and the second conductive substrate layer; The first groove forms a first conductive area on the second conductive base layer, and the second groove forms a second conductive area on the first conductive base layer; The width of the first conductive area and the width of the second conductive area are both a, and the width of the insulating area is b, wherein the width a of the first conductive area and the width a of the second conductive area located in the local area of ​​the edge of the electrochromic film and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfy the following relationship: b≤a; and The local area of ​​the edge of the electrochromic film includes the middle section of the edge of the electrochromic film; or / and, a recessed area is formed at the edge of the electrochromic film, and the local area of ​​the edge of the electrochromic film includes the recessed area.

2. The electrochromic film according to claim 1, characterized in that: The value range of the width b of the insulating area located in the local area of ​​the edge of the electrochromic film is: b≥0mm; Or, b≤30mm; Or, 2mm≤b≤15mm.

3. The electrochromic film according to claim 1, characterized in that: The ratio of the width a of the first conductive area and the second conductive area located in the local area of ​​the edge of the electrochromic film to the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfies the following relationship: 5≤a / b.

4. The electrochromic film according to claim 1, characterized in that: The ratio of the width a of the first conductive area and the second conductive area located in the local area of ​​the edge of the electrochromic film to the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfies the following relationship: 5≤a / b≤50; Furthermore, the sum of the width a of the first conductive area and the second conductive area located in the local area of ​​the edge of the electrochromic film and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film satisfies the following relationship: 60mm≤a+b≤750mm.

5. The electrochromic film according to claim 1, characterized in that: The width a of the first conductive area and the second conductive area located in the local area of ​​the edge of the electrochromic film and the width b of the insulating area located in the local area of ​​the edge of the electrochromic film are respectively: a=88mm, b=8mm.

6. The electrochromic film according to claim 1, characterized in that: There are more than two first grooves, and the second groove is adjacent to two first grooves, wherein a partial area of ​​one of the first grooves overlaps with a partial area of ​​the second groove at the electrochromic stack layer to form the insulating area, and a first uncut area is further provided between another first groove and the second groove; And / or, there are more than two second grooves, the first groove is adjacent to two second grooves, a partial area of ​​one of the second grooves overlaps with a partial area of ​​the first groove at the electrochromic stack layer to form the insulating area, and a second uncut area is also provided between the other second groove and the first groove.

7. The electrochromic film according to claim 6, characterized in that: The width of the first uncut area and the width of the second uncut area are both c, and the width c of the first uncut area and the width of the second uncut area in the local area located at the edge of the electrochromic film and the width a of the first conductive area and the width a of the second conductive area in the local area located at the edge of the electrochromic film satisfy the following relationship: c≤a.

8. The electrochromic film according to claim 1, characterized in that: The height of the electrochromic film along the first direction is H1, and the height of the electrochromic film along the second direction is H2, wherein the first direction and the second direction are perpendicular to each other, and the product of the height H1 in the first direction and the height H2 in the second direction satisfies the following relationship: H1×H2≤2500mm 2 / m 4 。 9. The electrochromic film according to claim 1, characterized in that: The thickness of the first conductive substrate layer is greater than or equal to 120 μm; And / or, the thickness of the second conductive substrate layer is greater than or equal to 120 μm.

10. The electrochromic film according to claim 1, characterized in that: A first bus bar is provided at an edge of the first conductive substrate layer away from the electrochromic stack layer, and a portion of the first bus bar extends into the first conductive region and adheres to a side of the second conductive substrate layer close to the electrochromic stack layer; A second bus bar is provided at an edge of the second conductive substrate layer away from the electrochromic stack layer, and a portion of the second bus bar extends into the second conductive region and adheres to a side of the first conductive substrate layer close to the electrochromic stack layer.

11. The electrochromic film according to claim 1, characterized in that: Insulating glue is arranged in the insulating area.

12. The electrochromic film according to claim 10, characterized in that: The portion of the first bus bar located in the insulating area is arranged obliquely; And / or, a portion of the second bus bar located in the insulating area is arranged obliquely.

13. An electrochromic device, characterized in that: It comprises a substrate layer and the electrochromic film according to any one of claims 1 to 12, wherein the substrate layer and the electrochromic film are stacked.

14. A terminal product, characterized in that: It comprises the electrochromic film as described in any one of claims 1 to 12 or the electrochromic device as described in claim 13, wherein the terminal product comprises any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, a housing of an electronic product, glasses, a vehicle and a display panel.

Images