Electrochromic films and end products

Abstract

This application provides an electrochromic film and a terminal product. The electrochromic film includes a film body, which comprises a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer sequentially disposed thereon. Multiple first grooves are formed on one side edge of the film body to expose the second conductive layer and form multiple first electrodes. Multiple second grooves are formed on the other side edge of the film body to expose the first conductive layer and form multiple second electrodes. The film body has at least two corner regions, where the electrodes located in the corner regions are either all first electrodes or all second electrodes. An adhesive layer is located at the edge of the film body and covers the first and second electrodes. The electrochromic film and terminal product provided in this application, by setting an adhesive layer to guide the thermal expansion of PVB, avoids PVB directly squeezing the edge of the film, thus preventing demolding.

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 is a technology that causes electrochromic materials to undergo reversible and stable coloring or fading under the influence of an external voltage. An electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer, arranged sequentially. By applying a voltage between the first and second conductive layers, a redox reaction occurs in the electrochromic layer.

[0003] In existing technologies, to accelerate the color-changing speed and improve the uniformity of electrochromic films, a multi-electrode structure is typically set at the edge of the electrochromic film. By simultaneously applying voltage to multiple electrodes, a rapid electrochromic effect is achieved. However, for films with corners, the film is prone to detachment at the corners, affecting its use. 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 with corners are prone to peeling off at the corners.

[0005] In a first aspect, embodiments of this application provide an electrochromic film, comprising:

[0006] The membrane body includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer arranged sequentially. Multiple first grooves are formed on one side edge of the membrane body to expose the second conductive layer and form multiple first electrodes. Multiple second grooves are formed on the other side edge of the membrane body to expose the first conductive layer and form multiple second electrodes. The membrane body has at least two corner regions, and the electrodes located in the corner regions are either all first electrodes or all second electrodes.

[0007] An adhesive layer is located at the edge of the diaphragm body, and the adhesive layer covers the first electrode and the second electrode.

[0008] Since the electrodes located at the corners are all either the first or second electrode, meaning they share the same polarity, applying an adhesive layer to the half-cut surfaces (first and second grooves) during automated production effectively prevents delamination. The principle behind forming the first and second grooves (i.e., half-cut) at the corners and applying the adhesive layer to prevent delamination during lamination is as follows: Firstly, the electrodes at the corners share the same polarity, meaning they are on the same side of the membrane. This facilitates the subsequent one-time application of the busbar and adhesive layer on one side, preventing delamination at the corners when the membrane is flipped. Secondly, the formation of the first and second grooves creates a step at the corner of the electrochromic membrane, reserving space for PVB thermal expansion. Applying the adhesive layer on the step creates a slope, guiding the thermal expansion of the PVB. Therefore, the adhesive layer prevents PVB from directly pressing against the membrane edges, protecting the membrane edges and preventing delamination.

[0009] In some embodiments, the first electrode and the second electrode are alternately arranged. That is, the positive and negative electrodes are alternately arranged, which is beneficial for the electrochromic film to change color uniformly.

[0010] In some embodiments, the electrodes located in the corner region are shaped like corner contours, while the electrodes located in the non-corner region are shaped like the edges of the electrochromic film. This is equivalent to processing electrodes only at the film edges, which also match the film edges. This results in a smaller electrode footprint, allowing for a larger visible area inside the film after the corner electrodes are matched to the film edges.

[0011] In some embodiments, the electrochromic film further includes:

[0012] The first lead-out component includes a first bus bar and a first lead-out electrode disposed on the first bus bar, wherein the first bus bar is connected to a plurality of the first electrodes;

[0013] The second lead-out assembly includes a second busbar and second lead-out electrodes disposed on the second busbar. The second busbar is connected to multiple second electrodes. This allows for rapid voltage application to the busbar. Since the electrodes located at the corners have the same polarity, they are easily connected to the busbar. Only one side of the busbar needs to be configured to connect all the corner electrodes, eliminating the need for flipping during automated production and preventing electrode detachment at the corners during flipping.

[0014] In some embodiments, the first busbar or the second busbar is configured in a shape mimicking the electrochromic film, wherein the shape mimicking the film includes one of a rectangle, a parallelogram, or an irregular quadrilateral. Because it is a shape mimicking the electrochromic film, the connection between the busbar and the electrochromic film is tighter, and only two busbars are needed to connect all the positive and negative electrodes, simplifying the process.

[0015] In some embodiments, the first busbar includes a corner busbar and a non-corner busbar, the corner busbar being connected to the non-corner busbar. The corner busbar is disposed on the electrode in the corner region, and the non-corner busbar is disposed on the electrode in the non-corner region. The shape of the corner busbar is the same as the shape of the electrode located in the corner region. In some embodiments, the second busbar includes a corner busbar and a non-corner busbar, the corner busbar being connected to the non-corner busbar. The corner busbar is disposed on the electrode in the corner region, and the non-corner busbar is disposed on the electrode in the non-corner region. The shape of the corner busbar is the same as the shape of the electrode located in the corner region. In the prior art, some corner busbars are made by overlapping two long strip copper foils at the corner, and the overlapping copper foils may break later, resulting in an open circuit. However, the corner busbar provided in this application embodiment does not require copper foil overlapping, is thinner, has better structural stability, and is less prone to open circuits.

[0016] In some embodiments, the adhesive layer includes a first adhesive layer and a second adhesive layer. The first adhesive layer is disposed on the first busbar. The side of the first adhesive layer near the middle of the electrochromic film is connected to the first substrate layer, and the side of the first adhesive layer near the edge of the electrochromic film is connected to the second conductive layer.

[0017] The second adhesive layer is disposed on the second busbar. The side of the second adhesive layer near the middle of the electrochromic film is connected to the second substrate layer, and the side of the second adhesive layer near the edge of the electrochromic film is connected to the first conductive layer. By covering the busbar with an adhesive layer, and the side of the adhesive layer near the middle of the electrochromic film being connected to the first substrate layer (attached to the first substrate), and the side of the first adhesive layer near the edge of the electrochromic film being connected to the second conductive layer, the adhesive layer can limit and fix the busbar at the corresponding position in the tank, thereby improving the stability of the connection between the busbar and the second conductive layer in the first tank. That is, the adhesive layer 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 first tank 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 first tank.

[0018] In some embodiments, the first adhesive layer is disposed on the first busbar, and the side of the first adhesive layer near the middle of the electrochromic film is connected to the first substrate layer.

[0019] The second adhesive layer is disposed on the second busbar. The side of the second adhesive layer near the center of the electrochromic film is connected to the second base layer. Both the first and second adhesive layers extend outward to cover the edge of the electrochromic film. Thus, neither the first nor the second adhesive layer is attached to the conductive layer; instead, they extend outward to the edge of the electrochromic film and bond together. This design better prevents moisture and dust from entering the interior of the electrochromic film, thereby protecting the edge of the film.

[0020] In some embodiments, the first lead-out electrode and the second lead-out electrode are located in the non-corner area of ​​the electrochromic film. By setting a first busbar to connect with multiple positive electrodes and a second busbar to connect with multiple negative electrodes, and then setting the first lead-out electrode to connect with the first busbar and the second lead-out electrode to connect with the second busbar, only one pair of lead-out electrodes is needed to connect to the external circuit, i.e., to apply voltage to the film body. This saves space, facilitates wiring between the external circuit and the electrochromic film, and simplifies the design of the lead-out electrodes.

[0021] In some embodiments, the corner region includes a first corner and a second corner, where the angle of the first corner is smaller than the angle of the second corner, and the length of the electrode located at the first corner is greater than the length of the electrode located at the second corner. In applications, the smaller the angle of the corner, the closer the two sides forming the corner are, resulting in a more pronounced superposition of electric fields at the corner. This makes corners with smaller angles more prone to discoloration failure. Therefore, in this embodiment, the angle of the first corner is smaller than the angle of the second corner, making discoloration failure more likely to occur at the first corner. Thus, the length of the first corner electrode located at the first corner is set to be slightly longer, specifically greater than the length of the second corner electrode, and the second corner electrode is longer than the length of the first electrode located in the first non-corner region. This makes the color changes of the electrochromic film at the first and second corners more consistent, mitigating the superposition of electric fields at the corners and ensuring that the corner region of the electrochromic film does not fail.

[0022] In some embodiments, the first trench penetrates the first substrate layer, the first conductive layer, and the electrochromic layer, exposing the second conductive layer to form the first electrode;

[0023] The second groove penetrates the second substrate layer, the second conductive layer, and the electrochromic layer, exposing the first conductive layer to form the second electrode. Directly forming the electrode by exposing the conductive layer through grooves avoids the need for additional electrode material, simplifying the process. The staggered arrangement of grooves achieves a more uniform current distribution because the electrodes are not continuous strips but segmented, resulting in a more uniform electric field distribution and preventing uneven color change at the edges of the electrochromic film.

[0024] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect. The terminal product includes any one of a rearview mirror, curtain wall, sunroof, side window, windshield, electronic product casing, eyeglasses, vehicle, and display panel. Because the terminal product provided in this application includes the electrochromic film described in the first aspect, it possesses all the beneficial effects described in the first aspect. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of one of the electrode arrangement methods of the electrochromic film provided in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the second electrode arrangement method of the electrochromic film provided in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the third electrode arrangement method of the electrochromic film provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the adhesive layer configuration of the electrochromic film provided in this application embodiment. Figure 1 ;

[0032] Figure 7This is a schematic diagram of the adhesive layer configuration of the electrochromic film provided in this application embodiment. Figure 2 ;

[0033] Figure 8 This is a schematic diagram of the adhesive layer configuration of the electrochromic film provided in this application embodiment. Figure 3 ;

[0034] Figure 9 This is a schematic diagram of the adhesive layer configuration of the electrochromic film provided in this application embodiment. Figure 4 ;

[0035] Figure 10 This is a schematic diagram of the structure of a car side window provided in an embodiment of this application.

[0036] The attached icon numbers are as follows:

[0037] 10. Membrane body; 11. First substrate layer; 12. First conductive layer; 13. Electrochromic layer; 14. Second conductive layer; 15. Second substrate layer; 100. First tank; 101. First electrode; 102. Second tank; 103. Second electrode; 104. Corner area; 105. Non-corner area;

[0038] 20. Adhesive layer; 21. First adhesive layer; 22. Second adhesive layer;

[0039] 30. First lead-out assembly; 31. First busbar; 32. First lead-out electrode;

[0040] 40. Second lead-out assembly; 41. Second busbar; 42. Second lead-out electrode;

[0041] 50. Glass; 51. Installation part. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In a first aspect, embodiments of this application provide an electrochromic film, such as Figures 1 to 3 As shown, the electrochromic film includes a film body 10 and an adhesive layer 20;

[0049] 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 arranged sequentially. Multiple first grooves 100 are formed on one side edge of the membrane body 10 to expose the second conductive layer 14 and form multiple first electrodes 101. Multiple second grooves 102 are formed on the other side edge of the membrane body 10 to expose the first conductive layer 12 and form multiple second electrodes 103. The membrane body 10 has at least two corner regions 104, and the electrodes located in the corner regions 104 are either all first electrodes 101 or all second electrodes 103.

[0050] The adhesive layer 20 is located at the edge of the diaphragm body 10, and the adhesive layer 20 covers the first electrode 101 and the second electrode 103.

[0051] In existing technologies, if the polarities of the electrodes at the four corners are inconsistent—that is, some corners of the diaphragm are half-cut when viewed from one side and some corners are also half-cut when viewed from another side—then when applying the adhesive layer 20 to any side of the diaphragm, some adhesive layer 20 will adhere to the base layer at the corner of the diaphragm. The tension caused by the shrinkage of the adhesive layer will cause the conductive layer bonded to the base layer at some corners to lift, exacerbating demolding. This application designs the polarities of the electrodes at the corners of the diaphragm to be the same, meaning the corner electrodes are located on the same side of the diaphragm (only half-cut on one side of the diaphragm). This avoids demolding at the corners when applying the adhesive layer 20, and also facilitates the one-time application of the busbar and adhesive layer 20 to the corner electrodes.

[0052] Since the electrodes located at the corners are all either the first electrode 101 or the second electrode 103, meaning the polarity of the electrodes at the corners is the same, it is convenient to avoid delamination during automated production by attaching the adhesive layer 20 to the half-cut surfaces (first groove 100 and second groove 102). The principle behind forming the first groove 100 and second groove 102 (i.e., half-cut) at the corners and attaching the adhesive layer 20 to prevent delamination during lamination is as follows: the formation of the first groove 100 and second groove 102 creates a step at the corner of the electrochromic film, reserving space for the thermal expansion of PVB. Attaching the adhesive layer 20 to the step creates a slope, which guides the thermal expansion of PVB. Therefore, the adhesive layer 20 prevents PVB from directly pressing against the edge of the film, protecting the film edge and preventing delamination.

[0053] In applications, such as Figure 2 As shown, the electrochromic film is a quadrilateral film with four corner regions 104, and the electrodes in each of the four corner regions are first electrodes 101; in another embodiment, the electrodes in each of the four corner regions are second electrodes 103. In some embodiments, the electrochromic film can also be a triangular, pentagonal, or other shape, with the electrodes in the corner regions having the same polarity, thereby avoiding demolding. Furthermore, the film can also be an irregular shape, with the electrodes in the corner regions having the same polarity.

[0054] In some embodiments, such as Figure 2 As shown, the electrodes in the four corner regions 104 can all be positive or all be negative. Taking the example that all the electrodes in the corner regions 104 are positive, a busbar is attached to this surface to connect multiple positive electrodes. Then, an adhesive layer 20 is attached to the edge of the membrane so that the adhesive layer covers the positive electrodes in the four corners.

[0055] In applications, when the electrodes in the four corner regions 104 are set to the same polarity, the number of electrodes with the same polarity as those in the corner regions 104 on each side is set to an odd number. For example, when all the electrodes in the four corner regions 104 are positive, then the number of positive electrodes in the non-corner regions 105 on each side of the membrane is an odd number. In applications, such as... Figure 3 As shown, the electrochromic film includes a first surface and a second surface arranged opposite to each other. Multiple first electrodes 101 of the same polarity are formed on the edge of the first surface, and multiple second electrodes 103 of the same polarity are formed on the edge of the second surface. The electrodes located in the corner region 104 are all located on the first surface or the second surface. The electrodes located in the corner region 104 are either the first electrode 101 or the second electrode 103, that is, the electrodes located in the corner region 104 are of the same polarity.

[0056] In some embodiments, such as Figure 3 As shown, the first electrode 101 and the second electrode 103 are arranged alternately. That is, the positive and negative electrodes are arranged alternately, which is beneficial to the uniform color change of the electrochromic film.

[0057] In some embodiments, the electrode located in the corner region 104 has a corner-like shape, and the electrode located in the non-corner region 105 has an edge-like shape. This is equivalent to processing the electrode only at the edge of the membrane, and this electrode also matches the edge of the membrane. The electrode occupies less space, allowing for a larger visible area inside the membrane after the corner electrode matches the membrane edge. In applications, the electrode located in the corner region 104 can have a V-shape, a straight strip, an arc, etc., and the electrode located in the non-corner region 105 can have a straight strip, an arc, etc.

[0058] In some embodiments, such as Figure 1 and Figure 3 As shown, the electrochromic film also includes a first lead-out component 30 and a second lead-out component 40;

[0059] The first lead-out component 30 includes a first busbar 31 and a first lead-out electrode 32 disposed on the first busbar 31. The first busbar 31 is connected to a plurality of first electrodes 101.

[0060] The second lead-out assembly 40 includes a second busbar 41 and second lead-out electrodes 42 disposed on the second busbar 41. The second busbar 41 is connected to all of the multiple second electrodes 103. This allows for rapid voltage application to the busbar. Since the electrodes located in the corners have the same polarity, it is convenient for these corner electrodes to connect to the busbar. That is, only one side of the busbar needs to be configured to connect all the corner electrodes, eliminating the need for flipping during automated production and preventing the corner electrodes from detaching during the flipping process.

[0061] In some embodiments, the first busbar 31 or the second busbar 41 is configured in a shape mimicking the electrochromic film, and the mimicry structure includes a long strip shape selected from rectangles, parallelograms, and irregular quadrilaterals. Because it is a shape mimicking the electrochromic film, the connection between the busbar and the electrochromic film is tighter.

[0062] In some embodiments, the first busbar 31 is elongated and disposed along the edge of the electrochromic film. In some embodiments, the second busbar 41 is elongated and disposed along the edge of the electrochromic film. Thus, the busbars are adapted to the electrodes disposed at the edge of the electrochromic film, and only two busbars are needed to connect all the positive and negative electrodes respectively, simplifying the process.

[0063] In some embodiments, the first busbar 31 includes a corner busbar and a non-corner busbar, the corner busbar being connected to the non-corner busbar. The corner busbar is disposed on the electrode in the corner region 104, and the non-corner busbar is disposed on the electrode in the non-corner region 105. The shape of the corner busbar is the same as the shape of the electrode located in the corner region 104. In some embodiments, the second busbar 41 includes a corner busbar and a non-corner busbar, the corner busbar being connected to the non-corner busbar. The corner busbar is disposed on the electrode in the corner region 104, and the non-corner busbar is disposed on the electrode in the non-corner region 105. The shape of the corner busbar is the same as the shape of the electrode located in the corner region 104. In the prior art, some corner busbars are made by overlapping two long strip copper foils at the corner, and the overlapping copper foils may break later, resulting in an open circuit. However, the corner busbar provided in this embodiment does not require copper foil overlapping, is thinner, has better structural stability, and is less prone to open circuits.

[0064] In some embodiments, such as Figure 6 and Figure 7 As shown, the adhesive layer 20 includes a first adhesive layer 21 and a second adhesive layer 22. The first adhesive layer 21 is disposed on the first busbar 31. The side of the first adhesive layer 21 near the middle of the electrochromic film is connected to the first base layer 11, and the side of the first adhesive layer 21 near the edge of the electrochromic film is connected to the second conductive layer 14.

[0065] The second adhesive layer 22 is disposed on the second busbar 41. The side of the second adhesive layer 22 near the middle of the electrochromic film is connected to the second base layer 15, and the side of the second adhesive layer 22 near the edge of the electrochromic film is connected to the first conductive layer 12. By covering the busbar with an adhesive layer 20, and with the side of the adhesive layer 20 near the center of the electrochromic film connected to the first substrate layer 11 (attached to the first substrate), and the side of the first adhesive layer 21 near the edge of the electrochromic film connected to the second conductive layer 14, the adhesive layer 20 can limit and fix the busbar at the corresponding position in the tank, thereby improving the stability of the connection between the busbar and the second conductive layer 14 in the first tank 100. That is, the adhesive layer 20 can further improve the stability of the busbar at the edge of the electrochromic film. Moreover, the adhesive layer 20 forms an insulating barrier layer on the surface of the busbar, which can prevent polyvinyl butyral from entering the electrochromic film through the first tank 100 and reacting with the electrochromic material layer in the subsequent lamination process. At the same time, it can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic film through the first tank 100.

[0066] In some embodiments, such as Figure 8 and Figure 9 As shown, the first adhesive layer 21 is disposed on the first busbar 31, and the side of the first adhesive layer 21 near the middle of the electrochromic film is connected to the first base layer 11.

[0067] The second adhesive layer 22 is disposed on the second busbar 41. The side of the second adhesive layer 22 near the middle of the electrochromic film is connected to the second base layer 15. Both the first adhesive layer 21 and the second adhesive layer 22 extend outward to cover the edge of the electrochromic film. In this way, neither the first adhesive layer 21 nor the second adhesive layer 22 is attached to the conductive layer, but extends outward to the edge of the electrochromic film and is bonded together. This design can better prevent moisture and dust from entering the interior of the electrochromic film, thereby protecting the edge of the film.

[0068] In some embodiments, such as Figure 1 and Figure 3As shown, the first lead-out electrode 32 and the second lead-out electrode 42 are located in the non-corner area 105 of the electrochromic film. In the prior art, if the lead-out electrodes are placed in the corners, a color change phenomenon will occur from one side of the corner to the other. The corner electrodes are also prone to color change failure because they are directly connected to the lead-out electrodes. Therefore, the present embodiment places the lead-out electrodes in the non-corner area, which can effectively prevent corner failure and improve the uniformity of color change. In addition, by setting the first bus bar 31 to connect with multiple positive electrodes and the second bus bar 41 to connect with multiple negative electrodes, and then setting the first lead-out electrode 32 to connect with the first bus bar 31 and the second lead-out electrode 42 to connect with the second bus bar 41, only one pair of lead-out electrodes is needed to connect to the external circuit, that is, to apply voltage to the film body 10. This saves space, facilitates the wiring of the external circuit to the electrochromic film, and simplifies the design of the lead-out electrodes.

[0069] In some embodiments, corner region 104 includes a first corner and a second corner, where the angle of the first corner is smaller than the angle of the second corner, and the length of the electrode located at the first corner is greater than the length of the electrode located at the second corner. In applications, the smaller the angle of the corner, the closer the two sides forming the corner are, and the more pronounced the electric field superposition phenomenon at the corner becomes. This makes corners with smaller angles more prone to discoloration failure. Based on this, in this embodiment, the angle of the first corner is smaller than the angle of the second corner, so discoloration failure is more likely to occur at the first corner. Therefore, the length of the first corner electrode located at the first corner is set to be longer, specifically longer than the length of the second corner electrode, and the length of the second corner electrode is longer than the length of the first electrode 101 located in the non-corner region 105. This makes the color change of the electrochromic film at the first corner and the second corner more consistent, slowing down or avoiding the occurrence of electric field superposition phenomenon, thereby ensuring that the corner region 104 of the electrochromic film does not fail.

[0070] In some embodiments, such as Figure 1 and Figure 4 As shown, the first trench 100 penetrates the first substrate layer 11, the first conductive layer 12, and the electrochromic layer 13, exposing the second conductive layer 14 to form the first electrode 101. In some embodiments, such as Figure 1 and Figure 3 As shown, the second tank 102 is located in the corner region 104. The second tank 102 penetrates the second base layer 15, the second conductive layer 14 and the electrochromic layer 13, and exposes the first conductive layer 12 to form the second electrode 103.

[0071] In other embodiments, such as Figure 1 and Figure 5 As shown, the first trench 100 penetrates the second substrate layer 15 and exposes the second conductive layer 14 to form the first electrode 101; as Figure 1 and Figure 4As shown, the second groove 102 is located in the corner region 104. The second groove 102 penetrates the first base layer 11 and exposes the first conductive layer 12 to form the second electrode 103.

[0072] By exposing the conductive layer through slots to directly form electrodes, this design avoids the need for additional electrode material, simplifying the process. The staggered arrangement of the slots enables a more uniform current distribution because the electrodes are not continuous strips but segmented, resulting in a more uniform electric field distribution and preventing uneven discoloration at the edges of the electrochromic film.

[0073] In applications, such as Figure 3 and Figure 4 As shown, the electrodes located in the non-corner region 105 are arranged in the same way as the electrodes located in the corner region 104, that is, a first trench 100 and a second trench 102 are also provided in the non-corner region 105. The first trench 100 penetrates the first substrate layer 11, the first conductive layer 12, and the electrochromic layer 13, exposing the second conductive layer 14 to form the first electrode 101; the second trench 102 penetrates the second substrate layer 15, the second conductive layer 14, and the electrochromic layer 13, exposing the first conductive layer 12 to form the second electrode 103. In other embodiments, such as Figure 5 As shown, the first trench 100 penetrates the second substrate layer 15, exposing the second conductive layer 14 to form the first electrode 101 located in the non-corner region 105; as Figure 4 As shown, the second trench 102 is located in the corner region 104. The second trench 102 penetrates the first base layer 11 and exposes the first conductive layer 12 to form the second electrode 103 located in the non-corner region 105.

[0074] Secondly, embodiments of this application provide a terminal product including the electrochromic film described in the first aspect. The terminal product includes any one of a rearview mirror, curtain wall, sunroof, side window, windshield, electronic product casing, eyeglasses, vehicle, and display panel. Because the terminal product provided in this application includes the electrochromic film described in the first aspect, it possesses all the beneficial effects described in the first aspect.

[0075] In some embodiments, the end product provided in this application is a car side window containing the electrochromic film described in the first aspect. The car side window includes an electrochromic film and two pieces of glass 50. The electrochromic film is sandwiched between the two pieces of glass 50. The two pieces of glass 50 and the electrochromic film are bonded together by PVB. A sealant or sealing strip is provided at the edge of the electrochromic film to seal the electrochromic film.

[0076] like Figure 10As shown, a black border is provided on the outer edge of the automotive side window glass to cover the electrodes at the edge of the electrochromic film, thereby improving aesthetics. In some embodiments, a mounting portion 51 is provided on the lower side of the electrochromic glass, which is used to connect to a drive source. Driven by the drive source, the entire electrochromic automotive side window glass can be raised or lowered.

[0077] In applications, the lead-out electrodes of the electrochromic film typically correspond to one side of the glass closest to the mounting portion. Black borders are silkscreened on the inner walls of the other sides of the two glass panes 50 to conceal the electrodes at the edges of the electrochromic film. Furthermore, the width of the black borders is typically between 10mm and 30mm. Only a waterline exists on the side of the glass 50 closest to the mounting portion 51; no black border is silkscreened on this side of the glass. The waterline can be understood as the intersection of the door frame seal and the glass when the side window is raised to its highest point. The lower edge of the side window is typically 30mm to 200mm from the waterline.

[0078] 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.

[0079] 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 by, include: The membrane body includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer arranged sequentially. Multiple first grooves are formed on one side edge of the membrane body to expose the second conductive layer and form multiple first electrodes. Multiple second grooves are formed on the other side edge of the membrane body to expose the first conductive layer and form multiple second electrodes. The membrane body has at least two corner regions, and the electrodes located in the corner regions are either all first electrodes or all second electrodes. An adhesive layer is located at the edge of the diaphragm body, and the adhesive layer covers the first electrode and the second electrode.

2. The electrochromic louver of claim 1, wherein, The first electrode and the second electrode are arranged alternately.

3. The electrochromic louver of claim 1, wherein, The electrode located in the corner region has a corner-like shape, and the electrode located in the non-corner region has an edge-like shape.

4. The electrochromic louver of claim 1, wherein, The electrochromic film further includes: The first lead-out component includes a first bus bar and a first lead-out electrode disposed on the first bus bar, wherein the first bus bar is connected to a plurality of the first electrodes; The second lead-out component includes a second busbar and a second lead-out electrode disposed on the second busbar, wherein the second busbar is connected to a plurality of the second electrodes.

5. The electrochromic louver of claim 4, wherein, The first busbar or the second busbar is configured in a shape that mimics the electrochromic film. Alternatively, the first busbar or the second busbar may include a corner busbar and a non-corner busbar, wherein the corner busbar is connected to the non-corner busbar, the corner busbar is disposed on the electrode in the corner region, and the non-corner busbar is disposed on the electrode in the non-corner region, and the shape of the corner busbar is the same as the shape of the electrode located in the corner region.

6. The electrochromic louver of claim 4, wherein, The adhesive layer includes a first adhesive layer and a second adhesive layer. The first adhesive layer is disposed on the first busbar. The side of the first adhesive layer near the middle of the electrochromic film is connected to the first substrate layer, and the side of the first adhesive layer near the edge of the electrochromic film is connected to the second conductive layer. The second adhesive layer is disposed on the second busbar. The side of the second adhesive layer near the middle of the electrochromic film is connected to the second base layer, and the side of the second adhesive layer near the edge of the electrochromic film is connected to the first conductive layer. Alternatively, the first adhesive layer is disposed on the first busbar, and the side of the first adhesive layer near the middle of the electrochromic film is connected to the first substrate layer; The second adhesive layer is disposed on the second busbar, and the side of the second adhesive layer near the middle of the electrochromic film is connected to the second base layer. Both the first adhesive layer and the second adhesive layer extend outward to cover the edge of the electrochromic film.

7. The electrochromic louver of claim 4, wherein, The first lead-out electrode and the second lead-out electrode are located in the non-corner region of the electrochromic film.

8. The electrochromic louver of claim 1, wherein, The corner area includes a first corner and a second corner, the angle of the first corner is smaller than the angle of the second corner, and the length of the electrode located in the first corner is greater than the length of the electrode located in the second corner.

9. The electrochromic louver of any one of claims 1 to 8, wherein, The first trench penetrates the first substrate layer, the first conductive layer, and the electrochromic layer, exposing the second conductive layer to form the first electrode; The second trench penetrates the second base layer, the second conductive layer, and the electrochromic layer, exposing the first conductive layer to form the second electrode.

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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