Electrochromic diaphragm and end product

Abstract

The application provides an electrochromic film and a terminal product, wherein the electrochromic film comprises: a film body, which comprises a corner area and an edge area adjacent to the corner area, a plurality of first electrodes and a plurality of second electrodes are formed on two sides of the edge area, and one side of the corner area is provided with a first electrode or a second electrode; a first bus bar and a second bus bar are arranged on the film body, the first bus bar is connected to the plurality of first electrodes in conduction, and the second bus bar is connected to the plurality of second electrodes in conduction; and a colloid, which comprises a first glue layer, a second glue layer and a third glue layer, the first glue layer and the second glue layer cover the first bus bar and the second bus bar in the edge area respectively, and the third glue layer covers the first bus bar in the corner area or covers the second bus bar in the corner area. The electrochromic film and the terminal product provided by the application can reduce the thickness of the corner area by arranging the glue layer on one side of the corner area, so that the film is not broken in the subsequent film combining process.

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, positive and negative electrodes are respectively set on the front and back of the diaphragm. Multiple positive electrodes are connected by a busbar, and multiple negative electrodes are connected by another busbar. Lead-out electrodes are then set on the busbars to enable conduction between the busbars and the external power source. Furthermore, to prevent external moisture from entering the electrochromic diaphragm, high-temperature adhesive is typically applied to the busbars at the diaphragm edges to seal them. However, applying high-temperature adhesive to the corners of the diaphragm can lead to either overlapping at the corners, resulting in a thicker diaphragm at the corners, which can cause cracking during subsequent lamination and affect product quality; or the adhesive needs to be bent at the corners, which, due to the curvature of the corners, can cause wrinkles in the adhesive, resulting in a thicker diaphragm at the corners. 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 thick at the corners and prone to cracking.

[0005] In a first aspect, embodiments of this application provide an electrochromic film, comprising: A membrane body, the membrane body including a corner region and an edge region adjacent to the corner region, a plurality of first electrodes and a plurality of second electrodes are formed on both sides of the edge region, and a first electrode or a second electrode is formed on one side of the corner region, the first electrode and the second electrode having opposite polarities; A first busbar and a second busbar are disposed on the diaphragm body. The first busbar is connected to and conducts through a plurality of first electrodes, and the second busbar is connected to and conducts through a plurality of second electrodes. The colloid includes a first adhesive layer, a second adhesive layer, and a third adhesive layer. The first adhesive layer and the second adhesive layer respectively cover the first busbar and the second busbar in the edge region. The third adhesive layer covers the first busbar on the first electrode in the corner region, or covers the second busbar on the second electrode in the corner region.

[0006] By applying an adhesive layer to the busbar of the electrode on one side of the corner area, the thickness of the diaphragm body in the corner area can be effectively reduced, thereby preventing cracking during subsequent lamination. Furthermore, the adhesive layer serves two purposes: it prevents moisture and dust from entering the internal layer structure of the diaphragm body, and it also prevents the diaphragm body in the corner area from demolding. It is worth noting that no adhesive layer is applied to the side of the corner area where no electrode is located. Since no groove is created on this side, the original diaphragm layer structure can still ensure a certain degree of sealing performance, preventing external water, dust, or other substances from entering the diaphragm interior.

[0007] In some embodiments, the third adhesive layer includes a first adhesive portion, a second adhesive portion, and a third adhesive portion disposed sequentially, wherein the first adhesive portion and the third adhesive portion both extend outward from one side of the middle portion of the film body and are bonded to each other with the first adhesive layer or the second adhesive layer. The outer edge of the second adhesive portion is flush with the outer edge of the corner area, or the outer edge of the second adhesive portion is recessed relative to the outer edge of the corner area. By connecting both ends of the third adhesive layer (the first adhesive portion and the third adhesive portion) to the adhesive layer on the back side, the sealing performance of the third adhesive layer for the electrodes and busbars in the corner area can be effectively improved. The second adhesive portion being recessed or flush with the outer edge of the corner area is advantageous for adhesive layer placement, as the outer edge of the electrode provides space for the third adhesive layer, facilitating its adhesion. A flush placement improves the smoothness and aesthetics of the corner area.

[0008] In some embodiments, the electrode located in the corner region protrudes outward relative to the electrode located in the edge region. The outer edge of the electrode in the corner region provides space for the third adhesive layer, facilitating its adhesion.

[0009] In some embodiments, the first and second adhesive layers are flush with the outer edge of the electrode in the corner region. In some embodiments, the outer edge of the third adhesive layer is flush with the outer edge of the electrode in the corner region. This improves the overall flatness of the membrane body.

[0010] In some embodiments, the third adhesive layer is shaped like a contoured structure in the corner area. This allows the third adhesive layer to effectively cover the electrodes and busbars within the landing area. The contoured structure prevents the third adhesive layer from bending and wrinkling in the corner area, and avoids the membrane body in the corner area becoming too thick, which could affect subsequent lamination.

[0011] In some embodiments, when the first electrode is disposed in the corner region, the third adhesive layer is integral with the first adhesive layer; when the second electrode is disposed in the corner region, the third adhesive layer is integral with the second adhesive layer. Integrating the third adhesive layer with either the first or second adhesive layer improves the overall structural strength of the adhesive layer and simplifies the manufacturing process.

[0012] 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. One side of the edge region is provided with a plurality of first grooves, the first grooves penetrating the first base layer, the first conductive layer, the electrochromic layer, and exposing a portion of the second conductive layer to form a plurality of first electrodes; the other side of the edge region is provided with a plurality of second grooves, the second grooves penetrating the second base layer, the second conductive layer, the electrochromic layer, and exposing a portion of the first conductive layer to form a plurality of second electrodes; the first grooves and the second grooves are arranged alternately. The first electrode is formed by a first groove on one side of the corner region, or the second electrode is formed by a second groove on one side of the corner region. This electrode design integrates the first and second electrodes on both sides of the membrane through an interlaced groove structure, which can effectively reduce resistance. The interlaced layout makes the electric field distribution more uniform and avoids uneven discoloration. The integrated processing of the grooves reduces the need for additional electrode materials and assembly steps.

[0013] 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. One side of the edge region is provided with a plurality of first grooves, 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 other side of the edge region is provided with a plurality of second grooves, 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. The first groove is provided on one side of the corner region to form the second electrode, or the first groove is formed on one side of the corner region to form the first electrode. The groove only penetrates the substrate layer to expose the underlying conductive layer, without damaging the electrochromic layer and the conductive layer on the other side. This greatly avoids the risk of short circuits or film performance damage to the electrochromic layer and conductive layer during processing, improving product yield and long-term reliability. Because fewer layers need to be etched or processed (only the substrate layer needs to be processed), the process difficulty and cost are reduced, and the production cycle is faster.

[0014] In some embodiments, the side of the first adhesive layer near the middle of the membrane body is connected to the first base layer, and the side of the first adhesive layer near the edge region is connected to the conductive layer exposed in the second groove. The second adhesive layer is connected to the second base layer on the side near the middle of the diaphragm body, and connected to the exposed conductive layer of the first groove on the side near the edge region. The first and second adhesive layers seal the groove and the electrodes and busbars within it, preventing external moisture and dust from entering the diaphragm.

[0015] In other embodiments, 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 edges of the diaphragm body. This allows for a tight seal of the outer edges of the diaphragm body using the first and second adhesive layers, further improving the sealing performance of the diaphragm body's edges.

[0016] In some embodiments, the third adhesive layer is connected to the first substrate layer on the side near the center of the membrane body, and to the first conductive layer or the second conductive layer on the side near the edge region. In other embodiments, the third adhesive layer is connected to the second substrate layer on the side near the center of the membrane body, and to the second conductive layer or the first conductive layer on the side near the edge region. The third adhesive layer also ensures the sealing of the electrode structure in the corner area, preventing external moisture and dust from entering the corner area.

[0017] In some embodiments, the edge region is provided with a plurality of third grooves spaced apart from each other, the third grooves penetrating the diaphragm body and connecting adjacent first grooves and second grooves; The third adhesive layer covers the third groove adjacent to the corner area. This third adhesive layer covering the third groove in the corner area plays a crucial role in sealing and reinforcing. It blocks channels through which electrolytes might leak from the corner, while reinforcing the most vulnerable structural gaps in the membrane, preventing interlayer peeling and thus avoiding potential short circuits.

[0018] 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.

[0019] The terminal product provided in this application includes the electrochromic film described in the first aspect, and therefore possesses all the beneficial effects described in the first aspect. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of the first side of the electrochromic film provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the second side of the electrochromic film provided in the embodiments of this application; Figure 3 This is a schematic cross-sectional view of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 4 This is a top view of the electrochromic film provided in the embodiments of this application; Figure 5 This is a schematic diagram of a partial first surface of the electrochromic film provided in an embodiment of this application; Figure 6 This is a schematic diagram of a partial second surface of the electrochromic film provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a local electrode of the electrochromic film provided in an embodiment of this application; Figure 8 This is a schematic diagram of the cross-sectional structure of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 9 This is a schematic diagram of the cross-sectional structure of an electrochromic film provided in another embodiment of this application; Figure 10 This is a schematic diagram of the structure of the electrochromic film with the first and second adhesive layers provided in the embodiments of this application. Figure 1 ; Figure 11 This is a schematic diagram of the structure of the electrochromic film with the first and second adhesive layers provided in the embodiments of this application. Figure 2 ; Figure 12 This is a schematic diagram of the structure of the electrochromic film with the first and second adhesive layers provided in the embodiments of this application. Figure 3 ; Figure 13This is a schematic diagram of the structure of the electrochromic film with the first and second adhesive layers provided in the embodiments of this application. Figure 4 ; Figure 14 This is a schematic diagram of the structure of the third adhesive layer of the electrochromic film provided in the embodiments of this application. Figure 1 ; Figure 15 This is a schematic diagram of the structure of the third adhesive layer of the electrochromic film provided in the embodiments of this application. Figure 2 ; Figure 16 This is a schematic diagram of the structure of an electrochromic film provided in another embodiment of this application.

[0022] The attached icon numbers are as follows: 10. Membrane body; 100. Corner region; 101. Edge region; 102. First electrode; 103. Second electrode; 104. First groove; 105. Second groove; 106. Third groove; 11. First substrate layer; 12. First conductive layer; 13. Electrochromic layer; 14. Second conductive layer; 15. Second substrate layer; 20. First busbar; 21. Second busbar; 30. Colloid; 31. First adhesive layer; 32. Second adhesive layer; 33. Third adhesive layer; 331. First adhesive portion; 332. Second adhesive portion; 333. Third adhesive portion. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In a first aspect, embodiments of this application provide an electrochromic film, such as Figures 1 to 3 As shown, the electrochromic membrane includes a membrane body 10, a first busbar 20, a second busbar 21, and a colloid 30; The membrane body 10 includes a corner region 100 and an edge region 101 adjacent to the corner region 100. Multiple first electrodes 102 and multiple second electrodes 103 are formed on both sides of the edge region 101. A first electrode 102 or a second electrode 103 is formed on one side of the corner region 100. The polarities of the first electrode 102 and the second electrode 103 are opposite. The first busbar 20 and the second busbar 21 are disposed on the diaphragm body 10. The first busbar 20 is connected to and conducts through multiple first electrodes 102, and the second busbar 21 is connected to and conducts through multiple second electrodes 103. The colloid 30 includes a first adhesive layer 31, a second adhesive layer 32, and a third adhesive layer 33. The first adhesive layer 31 and the second adhesive layer 32 respectively cover the first busbar 20 and the second busbar 21 in the edge region 101. The third adhesive layer 33 covers the first busbar 20 on the first electrode 102 in the corner region 100, or covers the second busbar 21 on the second electrode 103 in the corner region 100.

[0030] By applying an adhesive layer to the busbar of the electrode on one side of the corner region 100, the thickness of the diaphragm body 10 at the corner region 100 can be effectively reduced, thereby preventing cracking during subsequent lamination. Furthermore, the adhesive layer prevents moisture and dust from entering the internal layer structure of the diaphragm body 10 and also prevents demolding of the diaphragm body 10 at the corner region 100. It is worth noting that no adhesive layer is applied to the side of the corner region 100 where no electrode is located. Since no groove is formed on this side of the corner region 100, the original diaphragm layer structure can still ensure a certain degree of sealing performance, preventing external water, dust, or other substances from entering the diaphragm interior.

[0031] It should be noted that, as Figure 4 As shown, the electrochromic film provided in this embodiment includes a central working area and an edge area 101 and a corner area 100 surrounding the central working area. The corner area 100 is adjacent to the edge area 101. The edge area 101 is defined as a region extending from the outermost edge of the film towards the central working area with a width of W1, and the corner area 100 is defined as a region extending from the outer edge at the corner of the film towards the central working area with a width of W2. The values ​​of W1 and W2 range from 0.5 mm to 10 mm, preferably from 2 mm to 5 mm. The central working area is used to adjust the visible light transmittance, while the edge area 101 and the corner area 100 are mainly used to achieve sealing and electrical isolation. Furthermore, since the film body 10 has a first surface and a second surface arranged opposite to each other, the two sides of the edge area 101 refer to the positions where the first surface and the second surface of the film body 10 are located in the edge area 101. Similarly, one side of the corner area 100 refers to the position where one of the first surface or the second surface of the film body 10 is located in the corner area 100. The above explanation is for the purpose of facilitating understanding of this technical solution and should not be construed as a limitation on the scope of protection of this application.

[0032] The first electrode 102 and the second electrode 103 refer to electrodes with opposite polarities, that is, the following situations are included: if the first electrode 102 is a positive electrode, then the second electrode 103 is a negative electrode, or if the first electrode 102 is a negative electrode, then the second electrode 103 is a positive electrode. Since the corner region 100 only has an electrode on one side, a corner region 100 can either have a first electrode 102, in which case the first busbar 20 is connected to the first electrode 102 on the edge region 101 and is also connected to the first electrode 102 of the corner region 100; or the corner region 100 can have a second electrode 103, in which case the second busbar 21 is connected to the second electrode 103 on the edge region 101 and is also connected to the second electrode 103 of the corner region 100. Therefore, the following two situations will occur: the third adhesive layer 33 covers the first busbar 20 on the first electrode 102 in the corner region 100, or covers the second busbar 21 on the second electrode 103 in the corner region 100. It should also be noted that the electrochromic film can be triangular, rectangular, or irregular polygonal, so it can have multiple corner areas 100. In this case, the electrodes set in different corner areas 100 can be the same as the first electrode 102 or the second electrode 103, or the first electrode 102 can be set in one corner area 100 and the second electrode 103 can be set in another corner area 100.

[0033] In some embodiments, such as Figure 5 and Figure 6 As shown, the third adhesive layer 33 includes a first adhesive portion 331, a second adhesive portion 332 and a third adhesive portion 333 arranged sequentially. The first adhesive portion 331 and the third adhesive portion 333 both extend outward from one side of the middle part of the diaphragm body 10 and are bonded to each other with the first adhesive layer 31 or the second adhesive layer 32. The outer edge of the second adhesive portion 332 is flush with the outer edge of the corner area 100, or the outer edge of the second adhesive portion 332 is recessed relative to the outer edge of the corner area 100. By connecting the two ends (the first adhesive portion 331 and the third adhesive portion 333) of the third adhesive layer 33 to the adhesive layer on the back side, the sealing performance of the third adhesive layer 33 for the electrodes and busbars in the corner area 100 can be effectively improved. The second adhesive portion 332 being recessed or flush with the outer edge of the corner area 100 is advantageous for the placement of the adhesive layer, i.e., the outer edge of the electrode provides space for the third adhesive layer 33, facilitating its attachment. The flush placement improves the flatness and aesthetics of the corner area 100.

[0034] Specifically, when the corner region 100 contains the first electrode 102, that is, the third adhesive layer 33 and the first adhesive layer 31 are located on the same side of the membrane body 10, and the second adhesive layer 32 is located on the other side of the membrane body 10, the first adhesive portion 331 and the third adhesive portion 333 are bonded to the back side of the second adhesive layer 32. When the corner region 100 contains the second electrode 103, that is, the third adhesive layer 33 and the second adhesive layer 32 are located on the same side of the membrane body 10, and the first adhesive layer 31 is located on the other side of the membrane body 10, the first adhesive portion 331 and the third adhesive portion 333 are bonded to the back side of the first adhesive layer 31.

[0035] In some embodiments, such as Figure 4 and Figure 7 As shown, the electrode located in the corner region 100 protrudes outward relative to the electrode located in the edge region 101. The outer edge of the electrode in the corner region 100 provides space for the third adhesive layer 33, facilitating its attachment. In application, the electrode located in the corner region 100 is the first electrode 102, whose outer edge protrudes slightly more than the adjacent electrode. This facilitates the subsequent one-sided attachment of the adhesive layer. If the first electrode 102 is flush with the adjacent electrode, the portion of the adhesive layer extending beyond the first electrode 102 in the corner region 100, due to one-sided attachment, will adhere to the base on which the film is placed, affecting product quality. In application, the electrode located in the corner region 100 can also be the second electrode 103.

[0036] In some embodiments, the first adhesive layer 31 and the second adhesive layer 32 are flush with the outer edge of the electrode within the corner region 100. In some embodiments, such as Figure 5 As shown, the outer edge of the third adhesive layer 33 is flush with the outer edge of the electrode in the corner region 100. This helps to improve the overall flatness of the membrane body 10.

[0037] In some embodiments, such as Figure 5 As shown, the third adhesive layer 33 has a shape that mimics the corner region 100. In this way, the third adhesive layer 33 can effectively cover the electrodes and busbars in the corner region 100. The mimicry structure can prevent the third adhesive layer 33 from bending and wrinkling in the corner region 100, and prevent the film body 10 in the corner region 100 from being too thick, which would affect subsequent lamination.

[0038] In some embodiments, such as Figure 5 As shown, when the corner region 100 is provided with the first electrode 102, the third adhesive layer 33 and the first adhesive layer 31 are integrally formed; when the corner region 100 is provided with the second electrode 103, the third adhesive layer 33 and the second adhesive layer 32 are integrally formed. Making the third adhesive layer 33 integrally formed with the first adhesive layer 31 or the second adhesive layer 32 has the advantages of improving the structural strength of the entire adhesive layer and simplifying the process.

[0039] In some embodiments, such as Figure 4 and Figure 8 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 104 are provided on one side of the edge region 101. The first grooves 104 penetrate the first base layer 11, the first conductive layer 12, the electrochromic layer 13, and expose part of the second conductive layer 14 to form a plurality of first electrodes 102. A plurality of second grooves 105 are provided on the other side of the edge region 101. The second grooves 105 penetrate the second base layer 15, the second conductive layer 14, the electrochromic layer 13, and expose part of the first conductive layer 12 to form a plurality of second electrodes 103. The first grooves 104 and the second grooves 105 are arranged alternately. A first groove 104 is formed on one side of the corner region 100 to form a first electrode 102, or a second groove 105 is formed on one side of the corner region 100 to form a second electrode 103. This electrode design integrates the first and second electrodes 103 on both sides of the membrane through an interlaced groove structure, which can effectively reduce resistance. The interlaced layout makes the electric field distribution more uniform, avoids uneven discoloration, and the integrated processing of the grooves reduces additional electrode materials and assembly steps.

[0040] In some embodiments, such as Figure 9 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 104 are provided on one side of the edge region 101. The first grooves 104 penetrate the first base layer 11 and expose a portion of the first conductive layer 12 to form a plurality of first electrodes 102. A plurality of second grooves 105 are provided on the other side of the edge region 101. The second grooves 105 penetrate the second base layer 15 and expose a portion of the second conductive layer 14 to form a plurality of second electrodes 103. The first grooves 104 and the second grooves 105 are arranged alternately. A second groove 105 is provided on one side of the corner region 100 to form a second electrode 103, or a first groove 104 is provided on one side of the corner region 100 to form a first electrode 102. The groove only penetrates the substrate layer to expose the underlying conductive layer, without damaging the electrochromic layer 13 and the conductive layer on the other side. This greatly avoids the risk of short circuits or film performance damage to the electrochromic layer or conductive layer during processing, improving product yield and long-term reliability. Since fewer layers are etched or processed (only the substrate needs to be processed), the process difficulty and cost are reduced, and the production cycle is faster.

[0041] In some embodiments, such as Figure 10 and Figure 11As shown, the side of the first adhesive layer 31 near the middle of the film body 10 is connected to the first base layer 11, and the side of the first adhesive layer 31 near the edge region 101 is connected to the exposed conductive layer of the second groove 105. The second adhesive layer 32 is connected to the second base layer 15 on the side near the middle of the film body 10, and the side of the second adhesive layer 32 near the edge region 101 is connected to the exposed conductive layer of the first groove 104. In other embodiments, such as Figure 12 and Figure 13 As shown, the first adhesive layer 31 is connected to the first base layer 11 on the side near the middle of the membrane body 10, and the second adhesive layer 32 is connected to the second base layer 15 on the side near the middle of the membrane body 10. Both the first adhesive layer 31 and the second adhesive layer 32 extend outward to cover the edge of the membrane body 10. By covering the busbar with an adhesive layer, and having the adhesive layer 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 adhesive 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 substances from entering the interior of the electrochromic film through the groove.

[0042] In some embodiments, such as Figure 14 and Figure 15 As shown, the third adhesive layer 33 is connected to the first base layer 11 on the side near the middle of the membrane body 10, and to the first conductive layer 12 or the second conductive layer 14 on the side near the edge region 101. In other embodiments, the third adhesive layer 33 is connected to the second base layer 15 on the side near the middle of the membrane body 10, and to the second conductive layer 14 or the first conductive layer 12 on the side near the edge region 101. The provision of the third adhesive layer 33 also ensures the sealing of the electrode structure in the corner region 100, preventing external moisture and dust from entering the corner region 100.

[0043] In some embodiments, such as Figure 16 As shown, the edge region 101 is provided with a plurality of third grooves 106 spaced apart from each other. The third grooves 106 penetrate the diaphragm body 10 and connect to the adjacent first grooves 104 and second grooves 105. The third adhesive layer 33 covers the third groove 106 adjacent to the corner area 100. The third adhesive layer 33 covering the third groove 106 of the corner area 100 plays a crucial role in sealing and reinforcing. It blocks the channels through which electrolytes may leak from the corner, while reinforcing the most vulnerable structural gaps in the membrane to prevent interlayer peeling and demolding, thus avoiding short circuits that may occur here.

[0044] In applications, both the first substrate layer 11 and the second substrate layer 15 are transparent substrates. The "transparent substrate" is an optically transparent material, specifically a flexible substrate material, such as polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), cyclic olefin copolymers, or cellulose triacetate. The first substrate layer 11 and the second substrate layer 15 can also be glass substrates.

[0045] Both the first conductive layer 12 and the second conductive layer 14 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.

[0046] The electrochromic layer 13 is a sheet composed of one or more layers of gel-state 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 13, they may include sequentially stacked color-changing material layers, electrolyte layers, and ion storage layers. The materials of the color-changing material layers, electrolyte layers, and ion storage layers can be those found in the prior art, and this application does not impose any special limitations on them.

[0047] The electrochromic film has busbars on both sides in the thickness direction. Exemplarily, the busbars can be other conductive materials, including but not limited to conductive copper foil, conductive adhesive, and conductive resin. This allows for the formation of a multi-electrode structure at the edge of the dimming film, accelerating the color-changing speed of the dimming film. The first busbar 20 and the second busbar 21 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.

[0048] The colloid 30 is a sealing adhesive layer, namely 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 104 or the second groove 105, thus achieving the sealing and protection of the electrochromic membrane.

[0049] 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.

[0050] The terminal product provided in this application includes the electrochromic film described in the first aspect, and therefore possesses all the beneficial effects described in the first aspect.

[0051] 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.

[0052] 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 membrane body, the membrane body including a corner region and an edge region adjacent to the corner region, a plurality of first electrodes and a plurality of second electrodes are formed on both sides of the edge region, and a first electrode or a second electrode is formed on one side of the corner region, the first electrode and the second electrode having opposite polarities; A first busbar and a second busbar are disposed on the diaphragm body. The first busbar is connected to and conductively connected to a plurality of first electrodes, and the second busbar is connected to and conductively connected to a plurality of second electrodes. The colloid includes a first adhesive layer, a second adhesive layer, and a third adhesive layer. The first adhesive layer and the second adhesive layer respectively cover the first busbar and the second busbar in the edge region. The third adhesive layer covers the first busbar on the first electrode in the corner region, or covers the second busbar on the second electrode in the corner region.

2. The electrochromic film as described in claim 1, characterized in that, The third adhesive layer includes a first adhesive portion, a second adhesive portion, and a third adhesive portion arranged sequentially. The first adhesive portion and the third adhesive portion both extend outward from the film body and are bonded to the first adhesive layer or the second adhesive layer. The outer edge of the second adhesive portion is flush with the outer edge of the corner area, or the outer edge of the second adhesive portion is recessed relative to the outer edge of the corner area.

3. The electrochromic film as described in claim 1, characterized in that, The electrode located in the corner region is arranged to protrude outward relative to the electrode located in the edge region.

4. The electrochromic film as described in claim 1, characterized in that, The first adhesive layer and the second adhesive layer are flush with the outer edge of the electrode within the corner region; and / or, The outer edge of the third adhesive layer is flush with the outer edge of the electrode in the corner region.

5. The electrochromic film as described in claim 1, characterized in that, The third adhesive layer is shaped to mimic the corner area; and / or, When the first electrode is disposed in the corner area, the third adhesive layer and the first adhesive layer are integrally formed. When the second electrode is disposed in the corner area, the third adhesive layer and the second adhesive layer are integrally formed.

6. 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 edge region is provided with a plurality of first grooves, the first grooves penetrating the first base layer, the first conductive layer, the electrochromic layer, and exposing a portion of the second conductive layer to form a plurality of first electrodes; the other side of the edge region is provided with a plurality of second grooves, the second grooves penetrating the second base layer, the second conductive layer, the electrochromic layer, and exposing a portion of the first conductive layer to form a plurality of second electrodes; the first grooves and the second grooves are arranged alternately. The first electrode is formed by a first groove on one side of the corner region, or the second electrode is formed by a second groove on one side of the corner region; or... One side of the edge region is provided with a plurality of first grooves, 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 other side of the edge region is provided with a plurality of second grooves, 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. The first groove is provided on one side of the corner area to form the second electrode, or the first groove is provided on one side of the corner area to form the first electrode.

7. The electrochromic film as described in claim 6, characterized in that, The first adhesive layer is connected to the first base layer on the side near the middle of the membrane body, and the side of the first adhesive layer near the edge region is connected to the conductive layer exposed in the second groove; the second adhesive layer is connected to the second base layer on the side near the middle of the membrane 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 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.

8. The electrochromic film as described in claim 6, characterized in that, The third adhesive layer is connected to the first substrate layer on the side near the middle of the film body, and the side of the third adhesive layer near the edge region is connected to the first conductive layer or the second conductive layer; or... The third adhesive layer is connected to the second base layer on the side near the middle of the film body, and the third adhesive layer is connected to the second conductive layer or the first conductive layer on the side near the edge region.

9. The electrochromic film as described in claim 6, characterized in that, The edge region is provided with a plurality of third grooves spaced apart from each other. The third grooves penetrate the diaphragm body and connect the adjacent first grooves and second grooves. The third adhesive layer covers the third groove adjacent to the corner area.

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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