Electrochromic diaphragm and end product

Abstract

The application provides an electrochromic film and a terminal product, wherein the electrochromic film comprises: a film body, a plurality of electrodes are arranged on the outer edge of the film body, the film body comprises a corner area and an edge area adjacent to the corner area; a sealant layer is arranged on the outer edge of the film body; wherein the sealant layer is arranged on both sides of the edge area, the sealant layers on the two sides of the edge area extend outward from the film body and are adhered to each other; the sealant layer is arranged on one side of the corner area, and the sealant layer on the corner area is located on the inner side of the corner area or is flush with the outer edge of the corner area. The electrochromic film and the terminal product provided by the application can reduce the thickness of the sealant layer on the corner area by arranging the sealant layer on one side of the corner area, so that the phenomenon of film cracking in the subsequent film splicing process is avoided.

Description

Technical Field

[0001] This application belongs to the field of electrochromic technology, and particularly relates to an electrochromic film and its end product. Background Technology

[0002] Electrochromism refers to the phenomenon where the optical properties of a material undergo stable and reversible color changes under the influence of an applied electric field, manifesting as reversible changes in color and transparency. To achieve electrochromism, electrochromic films typically need to be electrically connected to an external power source.

[0003] In existing technologies, to connect the diaphragm to an external power source, grooves are typically cut into the diaphragm's edges to expose electrodes, thereby enabling conduction with the external power source. Furthermore, to prevent external moisture from entering the electrochromic diaphragm through the grooves, waterproof tape is usually applied to the grooves to seal the diaphragm's edges. However, due to the significant changes in the diaphragm's corner curvature, at least two straight strips of waterproof tape are usually required to overlap at the corners, or straight strips of waterproof tape are bent along the corners and applied. Both of these methods result in the waterproof tape at the corners being thicker than in other areas. When the diaphragm is subsequently assembled, this uneven thickness can easily lead to cracking, affecting the diaphragm's quality. Utility Model Content

[0004] In view of this, embodiments of this application provide an electrochromic film and a terminal product to solve the technical problem that existing electrochromic films are prone to cracking due to uneven thickness.

[0005] In a first aspect, embodiments of this application provide an electrochromic film, comprising: A diaphragm body, wherein multiple electrodes are disposed on the outer edge of the diaphragm body, and the diaphragm body includes a corner region and an edge region adjacent to the corner region; A sealant layer, wherein the sealant layer is located at the outer edge of the diaphragm body; The sealing adhesive layer is provided on both sides of the edge area, and the sealing adhesive layers on both sides of the edge area extend outward from the diaphragm body and are bonded to each other; The sealant layer is provided on one side of the corner area, and the sealant layer in the corner area is located on the inner side of the corner area, or the sealant layer in the corner area is flush with the outer edge of the corner area. By providing a sealant layer on one side of the corner area, the thickness of the membrane at the corner area can be reduced. Specifically, the sealant layer in the edge area is usually a straight strip, while the sealant layer in the corner area is either overlapped or bent; this would result in a thicker thickness at the corner area. By providing a sealant layer only on one side of the corner area, the thickness can be effectively reduced, thereby ensuring the uniform thickness of the entire membrane.

[0006] In some embodiments, a corner electrode is provided in the corner area, and the sealant layer on the corner area covers the corner electrode. For the edge area, sealant layers are provided on both sides. This is because the corner area has an electrode on only one side, while the edge area has electrodes on both sides, requiring the sealant layer to seal the electrodes. For the corner area, the side without an electrode does not expose the internal layer structure of the film. Therefore, providing a sealant layer only on the side where the electrode is located in the corner area can ensure the sealing of the corner area while effectively reducing the thickness of the corner area. This results in a uniform thickness of the entire electrochromic film, preventing cracking during subsequent lamination and improving the quality of the film.

[0007] In some embodiments, the corner electrode is a contoured structure of the corner region. This allows the corner electrode to perfectly conform to the curved shape of the corner, improving the uniformity of the electric field distribution in the corner region, thereby enhancing the consistency, response speed, and cycle life of the entire membrane's color-changing performance. In some embodiments, the sealant layer located in the corner region is a contoured structure of the corner electrode. This allows the sealant layer to perfectly conform to the shape of the corner electrode without bending and increasing its thickness, thus improving sealing performance.

[0008] In some embodiments, the width of the sealant layer located in the edge region is greater than the width of the sealant layer located in the corner region. Since electrodes are located on both sides of the edge region, a wider sealant layer in the edge region helps to cover the electrodes and improves sealing performance; furthermore, a wider sealant layer can improve the tightness of adhesion to the edge region. However, since the corner region has sealant on only one side, to prevent the sealant from extending beyond the corner region, the width of the sealant in the corner region is typically narrower, thus ensuring that the outer edge of the sealant in the corner region is flush with the outer edge of the corner region.

[0009] In some embodiments, the sealant layer located in the edge region and the sealant layer located in the corner region have a smooth transition. This design not only makes the entire electrochromic film more aesthetically pleasing, but also prevents the formation of sharp corners between the sealant layers in the edge and corner regions, thereby avoiding delamination during subsequent product processing.

[0010] In some embodiments, the electrochromic film further includes a first busbar and a second busbar, and the plurality of electrodes include a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes have opposite polarities; The first busbar is connected to and conductively connected to multiple first electrodes, and the second busbar is connected to and conductively connected to multiple second electrodes; The sealant layer covers the first busbar and the second busbar. By connecting multiple electrodes through the first and second busbars, the overall circuit resistance is significantly reduced, ensuring uniform voltage distribution and thus improving the response speed and color consistency of the large-area electrochromic membrane. The sealant layer also seals the electrodes, busbars, and other internal structures of the membrane, preventing external moisture from entering and corroding the internal structure, thereby ensuring the membrane's performance.

[0011] In some embodiments, the membrane body includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer stacked sequentially. The membrane body has a plurality of first grooves on one side, the first grooves penetrating the first substrate layer, the first conductive layer, the electrochromic layer, and exposing part of the second conductive layer to form a plurality of first electrodes. The edge of the other side of the membrane body has a plurality of second grooves, the second grooves penetrating the second substrate layer, the second conductive layer, the electrochromic layer, and exposing part of the first conductive layer to form a plurality of second electrodes. The first grooves and the second grooves are arranged alternately. The diaphragm body has multiple first grooves on one side, each groove penetrating the first substrate layer and exposing a portion of the first conductive layer to form multiple first electrodes. The diaphragm body also has multiple second grooves on the other side, each groove penetrating the second substrate layer and exposing a portion of the second conductive layer to form multiple second electrodes. The first and second grooves are staggered. By directly machining grooves and exposing the conductive layer to form electrodes in the edge region of the diaphragm body, it is convenient to apply a uniform voltage to the diaphragm body.

[0012] In some embodiments, the sealant layer includes a first adhesive layer and a second adhesive layer disposed on both sides of the edge region and a third adhesive layer disposed in the corner region; The first adhesive layer is connected to the first base layer on the side near the middle of the film body, and the first adhesive layer is connected to the conductive layer exposed in the second groove on the side near the edge area. The second adhesive layer is connected to the second base layer on the side near the middle of the film body, and the side of the second adhesive layer near the edge region is connected to the conductive layer exposed in the first groove; or, The first adhesive layer is connected to the first base layer on the side near the middle of the diaphragm body, and the second adhesive layer is connected to the second base layer on the side near the middle of the diaphragm body. Both the first and second adhesive layers extend outward to cover the edge of the diaphragm body. By covering the busbar with sealant, and the sealant layer being connected to the base layer on the side near the middle of the electrochromic diaphragm (attached to the base layer), and the sealant layer being connected to the conductive layer on the side near the edge of the electrochromic diaphragm, the sealant can limit and fix the busbar corresponding to the groove, thereby improving the stability of the connection between the busbar and the conductive layer in the groove. That is, the sealant can further improve the stability of the busbar at the edge of the electrochromic diaphragm. Moreover, the adhesive layer forms an insulating barrier layer on the surface of the busbar, which can prevent polyvinyl butyral from entering the electrochromic diaphragm through the groove during the subsequent lamination process and reacting with the electrochromic material layer. It can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic diaphragm through the groove.

[0013] In some embodiments, the third adhesive layer includes a first adhesive segment, a second adhesive segment, and a third adhesive segment arranged sequentially. The first adhesive segment, the second adhesive segment, and the third adhesive segment are all connected to the first substrate layer on the side near the middle of the film body. The first adhesive segment and the third adhesive segment are bonded to the first adhesive layer or the second adhesive layer on the back side on the side near the edge region. The second adhesive segment is connected to the first conductive layer or the second conductive layer on the side near the edge region. The widths of the first and third adhesive segments are both greater than the width of the second adhesive segment. By setting the widths of the first and third adhesive segments to be larger than that of the second adhesive segment, the first and third adhesive segments located at both ends of the corner area can bond with the adhesive layer on the back side, thereby improving the stability of the entire third adhesive layer. The second adhesive segment only needs to seal the electrode and busbar in the corner area.

[0014] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect, wherein the terminal product includes any one of a rearview mirror, curtain wall, car sunroof, car side window, car windshield, housing of electronic products, glasses, vehicle, and display panel.

[0015] The terminal product provided in this application embodiment includes the electrochromic film of the first aspect, and therefore has all the beneficial effects described in the first aspect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial structural diagram of the first side of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 2 This is a partial structural schematic diagram of the second side of the electrochromic film provided in the embodiments of this application; Figure 3 This is a schematic diagram of the electrode structure of the first side of the electrochromic film provided in the embodiments of this application; Figure 4 This is a partial structural diagram of the first side of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 5 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 6 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 7 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 3 ; Figure 8 This is a partial structural diagram of the first side of the electrochromic film provided in the embodiments of this application. Figure 3 ; Figure 9 This is a schematic diagram of the structure of the first and second adhesive layers in the sealant layer of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 10 This is a schematic diagram of the structure of the first and second adhesive layers in the sealant layer of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 11 This is a schematic diagram of the structure of the first adhesive layer, the second adhesive layer, and the first and second adhesive segments in the third adhesive layer of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 12 This is a schematic diagram of the structure of the first adhesive layer, the second adhesive layer, and the first and second adhesive segments in the third adhesive layer of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 13 This is a schematic diagram of the structure of the third adhesive segment in the third adhesive layer of the sealant layer of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 14 This is a schematic diagram of the structure of the third adhesive segment in the third adhesive layer of the sealant layer of the electrochromic film provided in the embodiments of this application. Figure 2 .

[0018] The attached icon numbers are as follows: 10. Membrane body; 100. Corner region; 1000. Corner electrode; 101. Edge region; 1010. First electrode; 1011. Second electrode; 11. First substrate layer; 12. First conductive layer; 13. Electrochromic layer; 14. Second conductive layer; 15. Second substrate layer; 110. First groove; 150. Second groove; 20. Sealant layer; 21. First adhesive layer; 22. Second adhesive layer; 23. Third adhesive layer; 231. First adhesive segment; 232. Second adhesive segment; 233. Third adhesive segment; 30. First busbar; 31. Second busbar. Detailed Implementation

[0019] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that the embodiments of this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the embodiments of this application with unnecessary detail.

[0020] It should also be understood that the term "and / or" as used in the specification of embodiments of this application and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0023] Furthermore, in the description of the embodiments and the appended claims of this application, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of embodiments in this application, references to "some embodiments" or "some embodiments" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in some embodiments," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiments, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" refers to two or more.

[0025] In a first aspect, embodiments of this application provide an electrochromic film, such as Figure 1 and Figure 2 As shown, the electrochromic membrane includes a membrane body 10 and a sealant layer 20; Multiple electrodes are disposed on the outer edge of the diaphragm body 10. The diaphragm body 10 includes a corner region 100 and an edge region 101 adjacent to the corner region 100. The sealant layer 20 is located at the outer edge of the diaphragm body 10; Among them, both sides of the edge area 101 are provided with a sealant layer 20, and the sealant layers 20 on both sides of the edge area 101 extend outward from the diaphragm body 10 and are bonded to each other. A sealant layer 20 is provided on one side of the corner area 100. The sealant layer 20 of the corner area 100 is located on the inner side of the corner area 100, or the sealant layer 20 of the corner area 100 is flush with the outer edge of the corner area 100.

[0026] By providing a sealant layer 20 on one side of the corner area 100, the membrane thickness at the corner area 100 is reduced. Specifically, the sealant layer 20 in the edge area 101 is usually a straight strip, while the sealant layer 20 in the corner area 100 is either overlapped or bent; this results in a thicker membrane at the corner area 100. By providing the sealant layer 20 only on one side of the corner area 100, the thickness can be effectively reduced, thereby ensuring uniform membrane thickness.

[0027] It should be noted that the corners of the corner area 100 on the diaphragm body 10 are not limited to rounded corners; they can be right angles, acute angles, obtuse angles, or irregular corners, etc. The thickness mentioned above refers to the distance in the stacking direction of the 10-layer structure of the diaphragm body.

[0028] In some embodiments, such as Figure 1 and Figure 3 As shown, a corner electrode 1000 is provided in the corner region 100, and a sealant layer 20 is provided on the corner region 100 to cover the corner electrode 1000. For the edge region 101, sealant layers 20 are provided on both sides. This is because the corner region 100 has an electrode on only one side, while the edge region 101 has electrodes on both sides, requiring the sealant layer 20 to seal the electrodes. For the corner region 100, the side without an electrode will not expose the internal layer structure of the film. Therefore, providing the sealant layer 20 only on the side of the corner region 100 where the electrode is located can ensure the sealing of the corner region 100 while effectively reducing the thickness of the corner region 100. This makes the thickness of the entire electrochromic film uniform, avoiding cracking during subsequent lamination and improving the quality of the film.

[0029] In some embodiments, such as Figure 3 As shown, the corner electrode 1000 is a contoured structure of the corner region 100. Thus, the shape of the corner electrode 1000 perfectly conforms to the curved shape of the corner, which helps improve the uniformity of the electric field distribution in the corner region 100, thereby enhancing the consistency, response speed, and cycle life of the entire film's color-changing performance. In some embodiments, such as... Figure 1 and Figure 3 As shown, the sealant layer 20 located in the corner area 100 is a contoured structure of the corner electrode 1000. In this way, the sealant layer 20 can perfectly fit the shape of the corner electrode 1000 without bending and increasing its thickness, which is beneficial to improving the sealing performance.

[0030] It should be noted that the contoured structure refers to the shape of the corner electrode 1000 being the same as or similar to the shape of the corner area 100, and the shape of the sealant layer 20 on the corner area 100 being the same as or similar to the shape of the corner electrode 1000. For example, when the corner area 100 is arc-shaped, the corner electrode 1000 is also arc-shaped, and the sealant layer 20 covering the corner electrode 1000 is also arc-shaped. This facilitates a tight fit and improves sealing performance.

[0031] In some embodiments, such as Figure 1 As shown, the width of the sealant layer 20 located in the edge region 101 is greater than the width of the sealant layer 20 located in the corner region 100. Since electrodes are provided on both sides of the edge region 101, setting the width of the sealant layer 20 located in the edge region 101 to be larger is beneficial for covering the electrodes in the edge region 101 and improving the sealing performance; in addition, the wider sealant layer 20 can improve the tightness of the adhesion to the edge region 101.

[0032] It should be noted that the width of the sealant layer 20 refers to the distance from the middle of the diaphragm body 10 to the edge area 101. This is only for the convenience of understanding the technical solution and should not be construed as a limitation of this application.

[0033] In some embodiments, such as Figure 4 As shown, the sealant layer 20 located in the edge region 101 and the sealant layer 20 located in the corner region 100 have a smooth transition. This design not only makes the entire electrochromic film more aesthetically pleasing, but also prevents the formation of sharp corners between the sealant layers 20 in the edge region 101 and the corner region 100, thereby avoiding delamination during subsequent product processing.

[0034] It should be noted that a smooth transition means that the connection between the sealant layer 20 located in the edge area 101 and the corner area 100 is smooth and does not form sharp corners. It is usually an arc-shaped or curved connection.

[0035] In some embodiments, such as Figures 5 to 7 As shown, the electrochromic film also includes a first busbar 30 and a second busbar 31, and the multiple electrodes include multiple first electrodes 1010 and multiple second electrodes 1011, with the first electrodes 1010 and the second electrodes 1011 having opposite polarities. The first busbar 30 is connected to and conducts through multiple first electrodes 1010, and the second busbar 31 is connected to and conducts through multiple second electrodes 1011; The sealant layer 20 covers the first busbar 30 and the second busbar 31. Multiple electrodes are connected through the first and second busbars 31, significantly reducing the overall circuit resistance and ensuring uniform voltage distribution, thereby improving the response speed and color consistency of the large-area electrochromic membrane. The sealant layer 20 seals the electrodes, busbars, and other structures located inside the membrane, preventing external moisture from entering and corroding the internal structure, thus ensuring the membrane's performance.

[0036] In application, corner electrode 1000 can be either first electrode 1010 or second electrode 1011. In other words, the polarity of corner electrode 1000 can be the same as the polarity of first electrode 1010 or the polarity of second electrode 1011. When the polarity of first electrode 1010 is positive, the polarity of second electrode 1011 is negative; or when the polarity of first electrode 1010 is negative, the polarity of second electrode 1011 is positive.

[0037] In some embodiments, such as Figure 5 and Figure 6 As shown, the membrane body 10 includes a first base layer 11, a first conductive layer 12, an electrochromic layer 13, a second conductive layer 14, and a second base layer 15 stacked sequentially. A plurality of first grooves 110 are provided on one side of the diaphragm body 10. The first grooves 110 penetrate the first substrate layer 11, the first conductive layer 12, the electrochromic layer 13, and expose a portion of the second conductive layer 14 to form a plurality of first electrodes 1010. A plurality of second grooves 150 are provided on the edge of the other side of the diaphragm body 10. The second grooves 150 penetrate the second substrate layer 15, the second conductive layer 14, the electrochromic layer 13, and expose a portion of the first conductive layer 12 to form a plurality of second electrodes 1011. The first grooves 110 and the second grooves 150 are arranged alternately. In other embodiments, such as Figure 7 As shown, a plurality of first grooves 110 are provided on one side of the diaphragm body 10. The first grooves 110 penetrate the first substrate layer 11 and expose a portion of the first conductive layer 12 to form a plurality of first electrodes 1010. A plurality of second grooves 150 are provided on the other side of the diaphragm body 10. The second grooves 150 penetrate the second substrate layer 15 and expose a portion of the second conductive layer 14 to form a plurality of second electrodes 1011. The first grooves 110 and the second grooves 150 are arranged alternately. By directly machining grooves and exposing the conductive layer to form electrodes in the edge region 101 of the diaphragm body 10, production reliability and packaging efficiency are improved.

[0038] In some embodiments, such as Figures 8 to 10As shown, the sealant layer 20 includes a first adhesive layer 21 and a second adhesive layer 22 disposed on both sides of the edge region 101, and a third adhesive layer 23 disposed in the corner region 100. The side of the first adhesive layer 21 near the middle of the diaphragm body 10 is connected to the first base layer 11, and the side of the first adhesive layer 21 near the edge region 101 is connected to the conductive layer exposed in the second groove 150. The side of the second adhesive layer 22 near the middle of the diaphragm body 10 is connected to the second base layer 15, and the side of the second adhesive layer 22 near the edge region 101 is connected to the conductive layer exposed in the first groove 110. In other embodiments, such as Figure 8 , Figure 11 and Figure 12 As shown, the first adhesive layer 21 is connected to the first base layer 11 on the side near the middle of the membrane body 10, and the second adhesive layer 22 is connected to the second base layer 15 on the side near the middle of the membrane body 10. Both the first adhesive layer 21 and the second adhesive layer 22 extend outward to cover the edge of the membrane body 10. By covering the busbar with sealant, and with the sealant layer 20 connected to the substrate layer on the side near the center of the electrochromic film (attached to the substrate layer), and the sealant connected to the conductive layer on the side near the edge of the electrochromic film, the sealant can effectively limit and fix the busbar at the groove, thereby improving the stability of the connection between the busbar and the conductive layer in the groove. In other words, the sealant can further improve the stability of the busbar at the edge of the electrochromic film. Moreover, the sealant layer forms an insulating barrier layer on the surface of the busbar, which can prevent polyvinyl butyral from entering the electrochromic film through the groove during the subsequent lamination process and reacting with the electrochromic material layer. It can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic film through the groove.

[0039] In some embodiments, such as Figure 8 , Figure 11 and Figure 12 As shown, the third adhesive layer 23 includes a first adhesive segment 231, a second adhesive segment 232, and a third adhesive segment 233 arranged sequentially. The sides of the first adhesive segment 231, the second adhesive segment 232, and the third adhesive segment 233 near the center of the membrane body 10 are all connected to the first substrate layer 11. The sides of the first adhesive segment 231 and the third adhesive segment 233 near the edge region 101 are bonded to the first adhesive layer 21 or the second adhesive layer 22 on the back side. Figure 13 and Figure 14As shown, the second adhesive segment 232 is connected to the first conductive layer 12 or the second conductive layer 14 on the side near the edge region 101; the widths of the first adhesive segment 231 and the third adhesive segment 233 are both greater than the width of the second adhesive segment 232. By setting the widths of the first adhesive segment 231 and the third adhesive segment 233 to be larger than the second adhesive segment 232, the first adhesive segment 231 and the third adhesive segment 233 located at both ends of the corner region 100 can be bonded to the adhesive layer on the back side, thereby improving the stability of the entire third adhesive layer 23. The second adhesive segment 232 only needs to seal the electrode and busbar of the corner region 100. In other words, the first adhesive segment 231 and the third adhesive segment 233 at both ends need to be bonded to the adhesive layer on the opposite side to form a Y-shaped attachment, and the second adhesive segment 232 in the middle is designed to be relatively narrow to fit the width of the corner electrode 1000.

[0040] It should be noted that the widths of the first adhesive segment 231 and the third adhesive segment 233, and the width of the second adhesive segment 232 are defined in the same way as the sealant layer 20, that is, the distance from the middle of the diaphragm body 10 to the edge region 101.

[0041] Both the first and second substrate layers are transparent substrates. The "transparent substrate" is an optically grade transparent material, specifically a flexible substrate material, such as polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), cyclic olefin copolymers, or cellulose triacetate. The first and second substrate layers can also be glass substrates.

[0042] Both the first and second conductive layers are transparent conductive layers. The material of the "transparent conductive layer" can be any transparent conductive material well known to those skilled in the art, such as indium-tin oxide (ITO), aluminum zinc oxide (AZO), fluorine-doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles.

[0043] Electrochromic layers are sheets composed of one or more layers of gel-like or solid materials, such as polymer-dispersed liquid crystal (PDLC) layers, suspended particle devices (SPD) layers, and electrochromic (EC) layers. For electrochromic (EC) type electrochromic layers, they may include a color-changing material layer, an electrolyte layer, and an ion storage layer stacked sequentially. The materials of the color-changing material layer, electrolyte layer, and ion storage layer can be those found in the prior art, and this application does not impose any special limitations on them.

[0044] The first and second busbars can be made of conductive materials, including but not limited to conductive copper foil, conductive adhesive, and conductive resin, thereby forming a multi-electrode structure at the edge of the dimming film and accelerating the color-changing speed of the dimming film. The first and second busbars can be made of conductive materials well known to those skilled in the art, such as at least one of conductive silver paste, conductive copper paste, conductive carbon paste, nano-silver conductive ink, copper foil, copper wire, and conductive adhesive film.

[0045] The sealant layer can be waterproof tape or insulating tape. Its main function is to cover and seal the edge of the membrane, thereby preventing moisture, impurities and other contaminants from entering the interior of the membrane through the first groove or the second groove, thus achieving the sealing and protection of the electrochromic membrane.

[0046] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect, wherein the terminal product includes any one of a rearview mirror, curtain wall, car sunroof, car side window, car windshield, housing of electronic products, glasses, vehicle, and display panel.

[0047] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] The above-described embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of the embodiments of this application.

Claims

1. An electrochromic film, characterized in that, include: A diaphragm body, wherein multiple electrodes are disposed on the outer edge of the diaphragm body, and the diaphragm body includes a corner region and an edge region adjacent to the corner region; A sealant layer, wherein the sealant layer is located at the outer edge of the diaphragm body; The sealing adhesive layer is provided on both sides of the edge area, and the sealing adhesive layers on both sides of the edge area extend outward from the diaphragm body and are bonded to each other; The corner area is provided with the sealant layer on one side, the sealant layer of the corner area is located on the inner side of the corner area, or the sealant layer of the corner area is flush with the outer edge of the corner area.

2. The electrochromic film as described in claim 1, characterized in that, A corner electrode is provided in the corner area, and the sealant layer located on the corner area covers the corner electrode.

3. The electrochromic film as described in claim 2, characterized in that, The corner electrode is a contoured structure of the corner region; and / or, The sealant layer located in the corner area is a contoured structure of the corner electrode.

4. The electrochromic film as described in claim 1, characterized in that, The width of the sealant layer located in the edge region is greater than the width of the sealant layer located in the corner region.

5. The electrochromic film as described in claim 4, characterized in that, The sealant layer located in the edge area has a smooth transition with the sealant layer located in the corner area.

6. The electrochromic film as described in claim 1, characterized in that, The electrochromic film further includes a first busbar and a second busbar, and the plurality of electrodes include a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes have opposite polarities; The first busbar is connected to and conductively connected to multiple first electrodes, and the second busbar is connected to and conductively connected to multiple second electrodes; The sealant layer covers the first busbar and the second busbar.

7. The electrochromic film as described in claim 1, characterized in that, The membrane body comprises a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer, which are stacked sequentially. One side of the membrane body has multiple first grooves, which penetrate the first substrate layer, the first conductive layer, the electrochromic layer, and expose a portion of the second conductive layer to form multiple first electrodes. The other side edge of the membrane body has multiple second grooves, which penetrate the second substrate layer, the second conductive layer, the electrochromic layer, and expose a portion of the first conductive layer to form multiple second electrodes. The first and second grooves are staggered. The membrane body has a plurality of first grooves on one side, the first grooves penetrating the first base layer and exposing a portion of the first conductive layer to form a plurality of first electrodes. The membrane body has a plurality of second grooves on the other side, the second grooves penetrating the second base layer and exposing a portion of the second conductive layer to form a plurality of second electrodes. The first grooves and the second grooves are arranged alternately.

8. The electrochromic film as described in claim 7, characterized in that, The sealant layer includes a first adhesive layer and a second adhesive layer disposed on both sides of the edge area and a third adhesive layer disposed in the corner area; The first adhesive layer is connected to the first substrate layer on the side near the middle of the membrane body; the first adhesive layer is connected to the conductive layer exposed in the second groove on the side near the edge region; the second adhesive layer is connected to the second substrate layer on the side near the middle of the membrane body; and the second adhesive layer is connected to the conductive layer exposed in the first groove on the side near the edge region; or, The first adhesive layer is connected to the first base layer on the side near the middle of the membrane body, and the second adhesive layer is connected to the second base layer on the side near the middle of the membrane body. Both the first adhesive layer and the second adhesive layer extend outward to cover the edge of the membrane body.

9. The electrochromic film as described in claim 8, characterized in that, The third adhesive layer includes a first adhesive segment, a second adhesive segment, and a third adhesive segment arranged sequentially. The first adhesive segment, the second adhesive segment, and the third adhesive segment are all connected to the first base layer on the side near the middle of the film body. The first adhesive segment and the third adhesive segment are bonded to the first adhesive layer or the second adhesive layer on the back side on the side near the edge region. The second adhesive segment is connected to the first conductive layer or the second conductive layer on the side near the edge region. The widths of the first adhesive segment and the third adhesive segment are both greater than the width of the second adhesive segment.

10. A terminal product, characterized in that, Includes the electrochromic film as described in any one of claims 1 to 9, wherein the end product includes any one of rearview mirrors, curtain walls, car sunroofs, car side windows, car windshields, housings of electronic products, eyeglasses, vehicles, and display panels.

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