Electrochromic diaphragm and device

Abstract

This application provides an electrochromic film and device, wherein the electrochromic film includes: a plurality of first electrodes and a plurality of second electrodes formed on the edge of a first side of the film body, a plurality of third electrodes and a plurality of fourth electrodes formed on the edge of a second side, a first lead-out assembly located on the first side, the first lead-out assembly including a first busbar and a first lead-out electrode disposed on the first busbar, the first busbar being connected to the plurality of first electrodes and the plurality of third electrodes; and a second lead-out assembly located on the first side, the second lead-out assembly including a second busbar and a second lead-out electrode disposed on the second busbar, the second busbar being connected to the plurality of second electrodes and the plurality of fourth electrodes; wherein the length of the first electrode is greater than the length of the third electrode and the length of the fourth electrode, and / or the length of the second electrode is greater than the length of the third electrode and the length of the fourth electrode. This effectively solves the problem of uneven color change in the electrochromic film.

Description

Technical Field

[0001] This application belongs to the field of electrochromic technology, and particularly relates to an electrochromic film and device. 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. Typically, a busbar is placed on an electrochromic film, connecting the film to an external power source. Applying a voltage across the electrochromic material causes the material to change color in response to variations in the voltage.

[0003] Typically, lead electrodes are placed at the edge of the film. However, electrochromic films tend to change color faster in areas close to the lead electrodes and slower in areas far from the lead electrodes. As a result, electrochromic films cannot change color uniformly. Utility Model Content

[0004] In view of this, embodiments of this application provide an electrochromic film and device to solve the technical problem of uneven color change in existing electrochromic films.

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

[0006] A membrane body includes a first side and a second side disposed opposite to each other. A plurality of first electrodes and a plurality of second electrodes are formed on the edge of the first side, and a plurality of third electrodes and a plurality of fourth electrodes are formed on the edge of the second side. The polarities of the first electrodes and the second electrodes are opposite, the polarities of the third electrodes and the fourth electrodes are opposite, and the polarities of the first electrodes and the third electrodes are the same.

[0007] A first lead-out component, located on the first side, includes a first busbar and first lead-out electrodes disposed on the first busbar. The first busbar is connected to a plurality of first electrodes and a plurality of third electrodes.

[0008] The second lead-out component is located on the first side. The second lead-out component includes a second bus bar and a second lead-out electrode disposed on the second bus bar. The second bus bar is connected to a plurality of second electrodes and a plurality of fourth electrodes.

[0009] Both the first lead-out electrode and the second lead-out electrode are located on the first side, wherein the length of the first electrode is greater than the length of the third electrode and the length of the fourth electrode, and / or the length of the second electrode is greater than the length of the third electrode and the length of the fourth electrode.

[0010] Typically, in existing electrochromic films, the electrodes on the first and second sides are of the same length. Because the first side has an output electrode (i.e., an electrical connection point for connecting to an external power source), the color-changing speed on the first side is faster than that on the second side, resulting in uneven color change across the entire electrochromic film. Therefore, in this embodiment, the lengths of the electrodes (first and second electrodes) located on the side with the output electrode (i.e., the first side) are set to be greater than the lengths of the electrodes (third and fourth electrodes) located on the side farther from the output electrode (the second side). In other words, by increasing the electrode length, the number of electrodes that can be placed on the first side decreases, resulting in sparser electrodes on the first side and denser electrodes on the second side. This balances the color-changing speeds of the first and second sides, achieving a uniform color change from the periphery to the center of the electrochromic film, effectively solving the problem of uneven color change.

[0011] The specific principle is that the denser the electrode arrangement, the faster the color change. Theoretically, one positive and one negative electrode is sufficient for color change. The current alternating positive and negative electrode arrangement can be considered as multiple pairs of positive and negative electrodes connected in series. The more electrode pairs connected in series, the faster the color change. In other words, the shorter the electrode length (the more electrodes, i.e., the denser the electrodes), the faster the color change. Therefore, a uniform color change effect can be achieved by making the electrode length shorter (denserly arranged).

[0012] In some embodiments, the lengths of the first electrode and the second electrode are 80 mm to 125 mm. In some embodiments, the lengths of the third electrode and the fourth electrode are 50 mm to 80 mm.

[0013] In some embodiments, the length of the first electrode and / or the length of the second electrode is L1, the length of the third electrode and / or the length of the fourth electrode is L2, and L1 / L2 = a, where a satisfies the following relationship:

[0014] 1.2≤a≤2.5. By limiting the ratio of electrode lengths on the first and second sides (1.2≤a≤2.5), and constraining the relative length relationship between the electrodes on the first and second sides, multi-dimensional optimization of device performance is achieved. Specifically, the difference in electrode lengths between the two sides can be adjusted to balance the color-changing speed on both sides.

[0015] In some embodiments, when the length of the first side is M and the distance between the first side and the second side is 0.5*M to M, the value of a ranges from 2 to 2.5. When the distance between the first side and the second side is large, the value of a is larger, that is, the greater the difference in density design between the first side and the second side, the sparser the first side and the denser the second side, thereby ensuring that the color-changing speed of the first side and the second side is consistent.

[0016] In some embodiments, the membrane body further includes a third side and a fourth side disposed opposite to each other, the distance between the first side and the second side is L3, the distance between the third side and the fourth side is L4, and L3 < L4;

[0017] The edge of the third side is formed with a plurality of fifth electrodes and a plurality of sixth electrodes, the length of the fifth electrode being greater than the length of the first electrode and the length of the second electrode, and the length of the sixth electrode being greater than the length of the first electrode and the length of the second electrode, respectively;

[0018] And / or, the edge of the fourth side is formed with a plurality of seventh electrodes and a plurality of eighth electrodes, the length of the seventh electrode being greater than the length of the first electrode and the length of the second electrode, and the length of the eighth electrode being greater than the length of the first electrode and the length of the second electrode, respectively. Since the distance between the third and fourth sides is relatively large (the distance between the third and fourth sides is usually the length of the first or second side), when the film changes color from the periphery to the center, the electrodes on the third and fourth sides contribute very little to the color change of the film. Therefore, the electrodes on the third and fourth sides can be arranged relatively sparsely, which can still meet the requirement of uniform color change of the film, and also facilitates processing and reduces the number of electrode processing steps; furthermore, the sparse arrangement of the electrodes on the third and fourth sides can effectively reduce optical distortion.

[0019] In some embodiments, the lengths of the fifth electrode and the sixth electrode are 130mm to 180mm. In some embodiments, the lengths of the seventh electrode and the eighth electrode are 130mm to 180mm. By placing the electrodes located on the third and fourth sides within the above range, the number of electrodes can be effectively reduced, resulting in a sparser electrode density. This satisfies the color-changing requirements while effectively reducing optical distortion.

[0020] In some embodiments, the membrane body further includes a third side and a fourth side disposed opposite to each other, the distance between the first side and the second side is L3, and the distance between the third side and the fourth side is L4;

[0021] When L4 / L3≥2 and L3<1.4m, electrodes are formed only on the first and second sides of the membrane body. That is, when the aspect ratio of the electrochromic membrane is greater than 2:1 and the membrane width is less than 1.4m, since the contribution of the third and fourth sides to the color change is extremely low, electrodes can be omitted on the third and fourth sides, simplifying the electrode design and not affecting the color change of the membrane from the first and second sides towards the middle.

[0022] 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.

[0023] The electrochromic film has multiple first grooves on one side of its edge, exposing a portion of the second conductive layer to form multiple first electrodes and multiple second electrodes. The electrochromic film has multiple second grooves on the other side of its edge, exposing a portion of the first conductive layer to form multiple third electrodes and multiple fourth electrodes. The first grooves and the second grooves are arranged alternately.

[0024] The first busbar is located on the side of the first substrate layer away from the first conductive layer, and the second busbar is located on the side of the second substrate layer away from the second conductive layer. Electrodes are directly formed by exposing the conductive layer through slotting, a design that avoids the addition of extra electrode material and simplifies the process. The staggered slots achieve 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. Furthermore, the busbars are positioned outside the substrate layer and do not directly contact the conductive layer, requiring a connection between the conductive layer and the busbars. This design prevents the busbars from interfering with the optical performance of the electrochromic film, and the location of the busbars outside the substrate layer also facilitates connection to external circuitry.

[0025] In some embodiments, the first busbar is further covered with a first adhesive layer, the side of the first adhesive layer near the middle of the electrochromic film is connected to the first base layer, and the side of the first adhesive layer near the edge of the electrochromic film is connected to the second conductive layer.

[0026] The second busbar is also covered with a second adhesive layer. 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. By covering the busbar with an adhesive layer, and having the side of the adhesive layer near the center of the electrochromic film 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 connected to the second conductive layer, the adhesive layer can effectively limit and fix the busbar at the corresponding groove, thereby improving the stability of the connection between the busbar and the second conductive layer in the first groove. In other words, 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 (PVB) from entering the electrochromic film through the first groove during the subsequent lamination process and reacting with the electrochromic material layer. It can also prevent external moisture, dust or other conductive substances from entering the interior of the electrochromic film through the first groove.

[0027] In some embodiments, the first busbar is further covered with a first adhesive layer, the first adhesive layer being connected to the first substrate layer on the side near the center of the electrochromic film. The second busbar is further covered with a second adhesive layer, the second adhesive layer being connected to the second substrate layer on the side near the center of the electrochromic film. Both the first and second adhesive layers extend outward to cover the edge of the electrochromic film. Thus, the first and second adhesive layers 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.

[0028] Secondly, embodiments of this application provide an electrochromic device, comprising:

[0029] The electrochromic film described in the first aspect;

[0030] Two glass layers are provided, with the electrochromic film located between the two glass layers. The electrochromic device provided in this application, because it includes the electrochromic film described in the first aspect, possesses all the beneficial effects described in the first aspect. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the structure of an electrode on one surface of an electrochromic film provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of the electrode on another surface of the electrochromic film provided in the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the size and structure of the electrochromic film provided in the embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the structure of one surface of the electrochromic film provided in the embodiments of this application;

[0037] Figure 6This is a schematic diagram of the structure of another surface of the electrochromic film provided in the embodiments of this application;

[0038] Figure 7 This is a schematic diagram of the structure of one surface of an electrochromic film provided in another embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the structure of another surface of the electrochromic film provided in another embodiment of this application;

[0040] Figure 9 This is a schematic diagram of the structure of the first side of the electrochromic film provided in the embodiments of this application;

[0041] Figure 10 This is a schematic diagram of the structure of the second side of the electrochromic film provided in the embodiments of this application;

[0042] Figure 11 This is a schematic diagram of the third or fourth side of the electrochromic film provided in the embodiments of this application;

[0043] Figure 12 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application, in which busbars are provided on both the front and back sides of the first side and an adhesive layer is provided;

[0044] Figure 13 This is a schematic diagram of the structure of the electrochromic film provided in the embodiments of this application, in which busbars are provided on both the front and back sides of the first side and an adhesive layer is provided;

[0045] Figure 14 This is a schematic diagram of the structure of an electrochromic film provided in another embodiment of this application, in which busbars are provided on both the front and back sides of the first side and an adhesive layer is provided;

[0046] Figure 15 This is a schematic diagram of the structure of an electrochromic film provided in another embodiment of this application, in which busbars are provided on both the front and back sides of the first side and an adhesive layer is provided;

[0047] Figure 16 This is a schematic diagram of the electrochromic device provided in the embodiments of this application;

[0048] Figure 17 This is a schematic diagram of the structure of a car side window provided in an embodiment of this application.

[0049] The attached icon numbers are as follows:

[0050] 1. Electrochromic film;

[0051] 10. Membrane body; 11. First side; 111. First electrode; 112. Second electrode; 12. Second side; 121. Third electrode; 122. Fourth electrode; 13. Third side; 131. Fifth electrode; 132. Sixth electrode; 14. Fourth side; 141. Seventh electrode; 142. Eighth electrode; 100. First substrate layer; 101. First conductive layer; 102. Electrochromic layer; 103. Second conductive layer; 104. Second substrate layer; 105. First groove; 106. Second groove; 107. Third groove; 108. Fourth groove;

[0052] 20. First lead-out assembly; 21. First busbar; 22. First lead-out electrode; 200. First adhesive layer;

[0053] 30. Second lead-out assembly; 31. Second busbar; 32. Second lead-out electrode; 300. Second adhesive layer;

[0054] 2. Glass layer; 20. Mounting section. Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Typically, multiple electrodes of equal length are arranged on the outer edge of an electrochromic film. To enable the electrochromic film to conduct electricity, lead-out electrodes are connected to it. These lead-out electrodes are usually located on one side of the electrochromic film. This results in the side of the electrochromic film with the lead-out electrodes changing color faster, while the side farther away from the lead-out electrodes changes color slower, leading to uneven color change of the electrochromic film as a whole.

[0062] Based on this, embodiments of this application provide an electrochromic film 1, such as... Figures 1 to 3 As shown, the electrochromic film 1 includes a film body 10, a first lead-out component 20, and a second lead-out component 30;

[0063] The diaphragm body 10 includes a first side 11 and a second side 12 disposed opposite to each other. A plurality of first electrodes 111 and a plurality of second electrodes 112 are formed on the edge of the first side 11, and a plurality of third electrodes 121 and a plurality of fourth electrodes 122 are formed on the edge of the second side 12. The polarities of the first electrodes 111 and the second electrodes 112 are opposite, the polarities of the third electrodes 121 and the fourth electrodes 122 are opposite, and the polarities of the first electrodes 111 and the third electrodes 121 are the same.

[0064] The first lead-out component 20 is located on the first side 11. The first lead-out component 20 includes a first bus bar 21 and a first lead-out electrode 22 disposed on the first bus bar 21. The first bus bar 21 is connected to a plurality of first electrodes 111 and a plurality of third electrodes 121.

[0065] The second lead-out component 30 is located on the first side 11. The second lead-out component 30 includes a second busbar 31 and a second lead-out electrode 32 disposed on the second busbar 31. The second busbar 31 is connected to a plurality of second electrodes 112 and a plurality of fourth electrodes 122.

[0066] The first lead-out electrode 22 and the second lead-out electrode 32 are both located on the first side 11, wherein the length of the first electrode 111 is greater than the length of the third electrode 121 and the length of the fourth electrode 122, and / or the length of the second electrode 112 is greater than the length of the third electrode 121 and the length of the fourth electrode 122.

[0067] In this embodiment, the lengths of the electrodes (first electrode 111 and second electrode 112) located on the side where the lead-out electrode is located (i.e., the first side 11) are set to be greater than the lengths of the electrodes (third electrode 121 and fourth electrode 122) located on the side away from the lead-out electrode (the second side 12). In other words, with the increased electrode length, the number of electrodes that can be placed on the first side 11 decreases, resulting in a sparser distribution of electrodes on the first side 11 and a denser distribution of electrodes on the second side 12. This balances the color-changing speeds of the first side 11 and the second side 12, thereby achieving a uniform color-changing effect from the periphery to the center of the electrochromic film 1, effectively solving the problem of uneven color change.

[0068] The specific principle is that the denser the electrode arrangement, the faster the color change. Theoretically, one positive and one negative electrode is sufficient for color change. The current alternating positive and negative electrode arrangement can be considered as multiple pairs of positive and negative electrodes connected in series. The more electrode pairs connected in series, the faster the color change. In other words, the shorter the electrode length (the more electrodes, i.e., the denser the electrodes), the faster the color change. At this point, a more uniform color change can be achieved by making the electrodes shorter (more densely packed).

[0069] It should be noted that the length of the electrodes mentioned above refers to the distance along the length direction of the first side 11 of the electrochromic film 1. Specifically, the length of the first electrode 111 is greater than the lengths of the third electrode 121 and the fourth electrode 122, and / or the length of the second electrode 112 is greater than the lengths of the third electrode 121 and the fourth electrode 122, including three cases: first, the length of the first electrode 111 is greater than the lengths of both the third electrode 121 and the fourth electrode 122; second, the length of the second electrode 112 is greater than the lengths of both the third electrode 121 and the fourth electrode 122; third, the lengths of both the first electrode 111 and the third electrode 121 are greater than the lengths of both the third electrode 121 and the fourth electrode 122, and the lengths of both the second electrode 112 and the third electrode 121 are also greater than the lengths of both the third electrode 121 and the fourth electrode 122. In a preferred embodiment, the lengths of the first electrode 111 and the second electrode 112 are greater than the lengths of both the third electrode 121 and the fourth electrode 122, in other words, the length of the electrode located on the first side 11 is greater than the length of the electrode located on the second side 12. For the first side 11 and the second side 12 of the electrochromic film 1, with a fixed side length, the longer the electrode length, the fewer the number of electrodes, i.e., the electrodes are sparser; the shorter the electrode length, the more the number of electrodes, i.e., the electrodes are denser. In this embodiment, the electrodes on the first side 11 are sparser, and the electrodes on the second side 12 are denser, thereby effectively balancing the color-changing speed of the first side 11 and the second side 12, thus achieving the technical effect of the electrochromic film 1 changing color from the periphery to the center.

[0070] In some embodiments, the length of the first electrode 111 and the length of the second electrode 112 are 80mm to 125mm. Specifically, the length of the first electrode 111 is 80mm to 125mm. In a specific embodiment, the length of the first electrode 111 can be any value within the range of 80mm to 125mm, such as 80mm, 85mm, 90mm, 95mm, 100mm, 110mm, 115mm, 120mm, or 125mm. Similarly, the length of the second electrode 112 is 80mm to 125mm. In a specific embodiment, the length of the second electrode 112 can be any value within the range of 80mm to 125mm, such as 80mm, 85mm, 90mm, 95mm, 100mm, 110mm, 115mm, 120mm, or 125mm. Since the length of the first side 11 is a fixed value, the longer the length of the electrodes on the first side 11, the fewer the number of electrodes there will be. In practical applications, if one or more electrodes fail, the number of electrodes may affect the normal operation of the electrochromic film 1 if there are too few electrodes. Therefore, it is more reasonable to set the length of the electrodes on the first side 11 in the range of 80mm to 125mm to ensure that there are still extra electrodes that can play a role.

[0071] In some embodiments, the lengths of the third electrode 121 and the fourth electrode 122 are 50mm to 80mm. Specifically, the length of the third electrode 121 is 50mm to 80mm; in specific embodiments, the length of the third electrode 121 can be any value within the range of 50mm to 80mm, such as 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, or 80mm. The length of the fourth electrode 122 is also 50mm to 80mm; in specific embodiments, the length of the fourth electrode 122 can be any value within the range of 50mm to 80mm, such as 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, or 80mm. Since the length of the first side 11 is a fixed value, the shorter the length of the electrodes on the first side 11, the more electrodes there will be. This is because the color-changing uniformity of the electrochromic film 1 is directly related to the current distribution of the electrodes.

[0072] In some embodiments, such as Figure 2 and Figure 3 As shown, the length of the first electrode 111 and / or the length of the second electrode 112 is L1, the length of the third electrode 121 and / or the length of the fourth electrode 122 is L2, and L1 / L2 = a, where a satisfies the following relationship:

[0073] 1.2 ≤ a ≤ 2.5. In other words, the ratio of the electrode located on the first side 11 to the electrode located on the second side 12 is a, where a is within the range of 1.2 to 2.5. The above includes the following cases: the length of the first electrode 111 is L1, and the length of the third electrode 121 is L2; ​​or the length of the first electrode 111 is L1, and the length of the fourth electrode 122 is L2; ​​or the length of the second electrode 112 is L1, and the length of the third electrode 121 is L2; ​​or the length of the second electrode 112 is L1, and the length of the fourth electrode 122 is L2. In a preferred embodiment, the lengths of both the first electrode 111 and the second electrode 112 are L1, and the lengths of both the third electrode 121 and the fourth electrode 122 are L2.

[0074] By limiting the ratio of electrode lengths on the first side 11 and the second side 12 (1.2 ≤ a ≤ 2.5), the relative length relationship between the electrodes on the first side 11 and the second side 12 is constrained, thereby achieving multi-dimensional optimization of device performance. Specifically, the difference in electrode lengths between the two sides can be adjusted to balance the color-changing speed on both sides.

[0075] It should be noted that the optical distortion is caused by the unevenness of the electrochromic film 1's edge due to the grooved electrodes, especially at the gaps between adjacent electrodes where the difference in height is greatest, leading to optical distortion. This application addresses this by designing the electrodes to be longer, which effectively reduces the number of gaps and thus reduces and mitigates optical distortion.

[0076] In some embodiments, such as Figure 4 As shown, when the length of the first side 11 is M, and the distance between the first side 11 and the second side 12 is 0.5*M to M, the value of a ranges from 2 to 2.5. When the distance between the first side 11 and the second side 12 is large, the value of a is larger, that is, the greater the difference in electrode density design between the first side 11 and the second side 12, the sparser the electrodes on the first side 11 and the denser the electrodes on the second side 12, thereby ensuring that the color-changing speed of the first side 11 and the second side 12 is consistent.

[0077] In some embodiments, such as Figure 5 As shown, the diaphragm body 10 also includes a third side 13 and a fourth side 14 arranged opposite to each other. The distance between the first side 11 and the second side 12 is L3, and the distance between the third side 13 and the fourth side 14 is L4, where L3 < L4. L3 refers to the length of the perpendicular line segment from the first side to the second side, and L4 refers to the length of the perpendicular line segment from the third side to the fourth side.

[0078] The edge of the third side 13 has multiple fifth electrodes 131 and multiple sixth electrodes 132. The length of the fifth electrode 131 is greater than the length of the first electrode 111 and the second electrode 112, and the length of the sixth electrode 132 is greater than the length of the first electrode 111 and the second electrode 112, respectively. The polarities of the fifth electrode 131 and the sixth electrode 132 are opposite.

[0079] In some embodiments, such as Figure 6 As shown, multiple seventh electrodes 141 and multiple eighth electrodes 142 are formed on the edge of the fourth side 14. The length of the seventh electrode 141 is greater than the length of the first electrode 111 and the length of the second electrode 112, and the length of the eighth electrode 142 is greater than the length of the first electrode 111 and the length of the second electrode 112, respectively. The polarities of the seventh electrode 141 and the eighth electrode 142 are opposite.

[0080] Since the distance between the third side 13 and the fourth side 14 is relatively large, when the film changes color from the periphery to the center, the electrodes on the third side 13 and the fourth side 14 contribute very little to the color change of the film. Therefore, when the electrodes on the third side 13 and the fourth side 14 are arranged relatively sparsely, the requirement for uniform color change of the film can still be met. In addition, it is also beneficial to the processing and reduces the number of electrode processing times. Furthermore, since the electrodes on the third side 13 and the fourth side 14 are arranged relatively sparsely, optical distortion can also be effectively reduced.

[0081] In some embodiments, the lengths of the fifth electrode 131 and the sixth electrode 132 are 130mm to 180mm. Specifically, the length of the fifth electrode 131 is 130mm to 180mm. In specific embodiments, the length of the fifth electrode 131 can be any value within the range of 130mm to 180mm, such as 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 175mm, or 180mm. Similarly, the length of the sixth electrode 132 is 130mm to 180mm. In specific embodiments, the length of the sixth electrode can be any value within the range of 130mm to 180mm, such as 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 175mm, or 180mm. In some embodiments, the lengths of the seventh electrode 141 and the eighth electrode 142 are 130mm to 180mm. The length of the seventh electrode 141 is 130mm to 180mm. In a specific embodiment, the length of the seventh electrode 141 can be any value within the range of 130mm to 180mm, such as 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 175mm, or 180mm. The length of the eighth electrode 142 is also 130mm to 180mm. In a specific embodiment, the length of the eighth electrode 142 can be any value within the range of 130mm to 180mm, such as 130mm, 135mm, 140mm, 145mm, 150mm, 155mm, 160mm, 165mm, 175mm, or 180mm. By placing the electrodes located on the third side 13 and the fourth side 14 within the above range, the number of electrodes can be effectively reduced, resulting in a sparser electrode density. This satisfies the color-changing requirements while effectively reducing optical distortion.

[0082] In some embodiments, such as Figure 7 and Figure 8 As shown, the diaphragm body 10 also includes a third side 13 and a fourth side 14 disposed opposite to each other. The distance between the first side 11 and the second side 12 is L3, and the distance between the third side 13 and the fourth side 14 is L4.

[0083] When L4 / L3≥2 and L3<1.4m, electrodes are formed only on the first side 11 and the second side 12 of the membrane body 10. That is, when the aspect ratio of the electrochromic membrane 1 is greater than 2:1 and the membrane width is less than 1.4m, since the contribution of the third side 13 and the fourth side 14 to the color change is extremely low, electrodes can be omitted on the third side 13 and the fourth side 14, which simplifies the electrode design and does not affect the color change of the membrane from the first side 11 and the second side 12 towards the middle.

[0084] In some embodiments, such as Figure 9 and Figure 10 As shown, the membrane body 10 includes a first base layer 100, a first conductive layer 101, an electrochromic layer 102, a second conductive layer 103, and a second base layer 104 stacked sequentially.

[0085] The electrochromic film 1 has multiple first grooves 105 on one side edge and exposes a portion of the second conductive layer 103 to form multiple first electrodes 111 and multiple third electrodes 121. The electrochromic film 1 has multiple second grooves 106 on the other side edge and exposes a portion of the first conductive layer 101 to form multiple second electrodes 112 and multiple fourth electrodes 122. The first grooves 105 and the second grooves 106 are arranged alternately.

[0086] The first busbar 21 is located on the side of the first substrate 100 away from the first conductive layer 101, and the second busbar 31 is located on the side of the second substrate 104 away from the second conductive layer 103. Specifically, a first groove 105 and a second groove 106 are formed on both sides of the edge of the first side 11, forming a first electrode 111 and a second electrode 112 with opposite polarities. Similarly, a first groove 105 and a second groove 106 are formed on both sides of the edge of the second side 12, forming a third electrode 121 and a fourth electrode 122 with opposite polarities. This design, which directly forms electrodes by exposing the conductive layer through grooves, avoids the need for additional electrode material and simplifies the manufacturing 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 1. This design also prevents the busbars from interfering with the optical performance of the electrochromic film 1, and the location of the busbars on the outside of the substrate facilitates connection to external circuits.

[0087] In some embodiments, such as Figure 11 As shown, multiple third grooves 107 and multiple fourth grooves 108 are respectively formed on both sides of the edge of the third side 13 of the electrochromic film 1, exposing a portion of the second conductive layer 103 to form multiple fifth electrodes 131 and multiple sixth electrodes 132. Multiple third grooves 107 and multiple fourth grooves 108 are respectively formed on both sides of the edge of the fourth side 14 of the electrochromic film 1, exposing a portion of the first conductive layer 101 to form multiple seventh electrodes 141 and multiple eighth electrodes 142. The third grooves 107 and fourth grooves 108 are arranged alternately. The first busbar 21 connects the multiple fifth electrodes 131 and multiple seventh electrodes 141, and the second busbar 31 connects the multiple sixth electrodes 132 and multiple eighth electrodes 142. The first busbar 21 is located on the side of the first substrate layer 100 away from the first conductive layer 101, and the second busbar 31 is located on the side of the second substrate layer 104 away from the second conductive layer 103.

[0088] In other words, multiple first grooves 105 are formed on the edge of one side of the electrochromic film 1 (including the first edge 11 and the second edge 12) to form multiple positive electrodes, and multiple second grooves 106 are formed on the edge of the other side of the film (including the first edge 11 and the second edge 12) to form negative electrodes; multiple third grooves 107 are formed on the edge of one side of the electrochromic film 1 (including the third edge 13 and the fourth edge 14) to form multiple positive electrodes, and multiple fourth grooves 108 are formed on the edge of the other side of the film (including the third edge 13 and the fourth edge 14) to form negative electrodes; then, the positive electrodes are connected through the first busbar 21 and the negative electrodes are connected through the second busbar 31. Specifically, the positive electrodes include the first electrode 111, the third electrode 121, the fifth electrode 131 and the seventh electrode 141; the negative electrodes include the second electrode 112, the fourth electrode 122, the sixth electrode 132 and the eighth electrode 142. Furthermore, the positions of the first groove 105 and the second groove 106 can be interchanged, that is, the positive electrode and the negative electrode can be interchanged.

[0089] In some embodiments, such as Figure 12 and Figure 13 As shown, the first busbar 21 is also covered with a first adhesive layer 200. The side of the first adhesive layer 200 near the middle of the electrochromic film 1 is connected to the first base layer 100, and the side of the first adhesive layer 200 near the edge of the electrochromic film 1 is connected to the second conductive layer 103.

[0090] The second busbar 31 is also covered with a second adhesive layer 300. The side of the second adhesive layer 300 near the middle of the electrochromic film 1 is connected to the second base layer 104, and the side of the second adhesive layer 300 near the edge of the electrochromic film 1 is connected to the first conductive layer 101. By covering the busbar with an adhesive layer, and having the adhesive layer connected to the first substrate layer 100 (attached to the first substrate) on the side near the center of the electrochromic film 1, and the first adhesive layer 200 connected to the second conductive layer 103 on the side near the edge of the electrochromic film 1, the adhesive layer can limit and fix the busbar corresponding to the groove, thereby improving the stability of the connection between the busbar and the second conductive layer 103 in the first groove 105. That is, the adhesive layer can further improve the stability of the busbar at the edge of the electrochromic film 1. 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 1 through the first groove 105 and reacting with the electrochromic material layer during 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 1 through the first groove 105.

[0091] In some embodiments, such as Figure 14 and Figure 15As shown, the first busbar 21 is also covered with a first adhesive layer 200. The side of the first adhesive layer 200 near the middle of the electrochromic film 1 is connected to the first substrate layer 100. The second busbar 31 is also covered with a second adhesive layer 300. The side of the second adhesive layer 300 near the middle of the electrochromic film 1 is connected to the second substrate layer 104. Both the first adhesive layer 200 and the second adhesive layer 300 extend outward to cover the edge of the electrochromic film 1. In this way, the first adhesive layer 200 and the second adhesive layer 300 extend outward to the edge of the electrochromic film 1 and are bonded together. This design can better prevent moisture and dust from entering the interior of the electrochromic film 1, thereby protecting the edge of the film.

[0092] Secondly, embodiments of this application provide an electrochromic device, such as... Figure 16 As shown, the electrochromic device includes the electrochromic film 1 described in the first aspect and two glass layers 2;

[0093] An electrochromic film 1 is located between two glass layers 2.

[0094] The electrochromic device provided in this application embodiment has all the beneficial effects described in the first aspect because it includes the electrochromic film 1 described in the first aspect.

[0095] In some embodiments, such as Figure 17 As shown, the electrochromic device provided in this application embodiment is a car side window containing the electrochromic film described in the first aspect. The car side window includes an electrochromic film 1 and two glass layers 2. The electrochromic film 1 is sandwiched between the two glass layers 2. The two glass layers 2 and the electrochromic film 1 are bonded together by PVB. A sealant or sealing strip is provided at the edge of the electrochromic film 1 to seal the electrochromic film.

[0096] like Figure 17 As 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 20 is provided on the lower side of the glass layer 2. This mounting portion 20 is used to connect to a drive source, and the entire electrochromic automotive side window glass can be raised or lowered by the drive source.

[0097] 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.

[0098] 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 includes a first side and a second side disposed opposite to each other. A plurality of first electrodes and a plurality of second electrodes are formed on the edge of the first side, and a plurality of third electrodes and a plurality of fourth electrodes are formed on the edge of the second side. The polarities of the first electrodes and the second electrodes are opposite, and the polarities of the third electrodes and the fourth electrodes are opposite. A first lead-out component, located on the first side, includes a first busbar and first lead-out electrodes disposed on the first busbar. The first busbar is connected to a plurality of first electrodes and a plurality of third electrodes. The second lead-out component is located on the first side. The second lead-out component includes a second bus bar and a second lead-out electrode disposed on the second bus bar. The second bus bar is connected to a plurality of second electrodes and a plurality of fourth electrodes. Wherein, the length of the first electrode is greater than the length of the third electrode and the length of the fourth electrode, and / or, the length of the second electrode is greater than the length of the third electrode and the length of the fourth electrode.

2. The electrochromic film as described in claim 1, characterized in that, The lengths of the first electrode and the second electrode are 80 mm to 125 mm, and / or, The lengths of the third electrode and the fourth electrode are 50mm to 80mm.

3. The electrochromic film as described in claim 1, characterized in that, The length of the first electrode and / or the length of the second electrode is L1, the length of the third electrode and / or the length of the fourth electrode is L2, and L1 / L2 = a, where a satisfies the following relationship: 1.2≤a≤2.5。 4. The electrochromic film as described in claim 3, characterized in that, When the length of the first side is M, and the distance between the first side and the second side is 0.5*M to M, the value of a ranges from 2 to 2.

5.

5. The electrochromic film as described in claim 1, characterized in that, The diaphragm body also includes a third side and a fourth side disposed opposite to each other, the distance between the first side and the second side is L3, the distance between the third side and the fourth side is L4, and L3 < L4; The edge of the third side is formed with a plurality of fifth electrodes and a plurality of sixth electrodes, wherein the length of the fifth electrode is greater than the length of the first electrode and the length of the second electrode, and the length of the sixth electrode is greater than the length of the first electrode and the length of the second electrode; And / or, the edge of the fourth side is formed with a plurality of seventh electrodes and a plurality of eighth electrodes, the length of the seventh electrode being greater than the length of the first electrode and the length of the second electrode, and the length of the eighth electrode being greater than the length of the first electrode and the length of the second electrode.

6. The electrochromic film as described in claim 5, characterized in that, The lengths of the fifth electrode and the sixth electrode are 130mm to 180mm; And / or, the length of the seventh electrode and the length of the eighth electrode are 130mm to 180mm.

7. The electrochromic film as described in claim 1, characterized in that, The diaphragm body also includes a third side and a fourth side disposed opposite to each other, the distance between the first side and the second side is L3, and the distance between the third side and the fourth side is L4; When L4 / L3≥2 and L3<1.4m, electrodes are formed only on the first and second sides of the diaphragm body.

8. The electrochromic film according to any one of claims 1 to 7, 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. The electrochromic film has multiple first grooves on one side of its edge, exposing a portion of the second conductive layer to form multiple first electrodes and multiple third electrodes. The electrochromic film has multiple second grooves on the other side of its edge, exposing a portion of the first conductive layer to form multiple second electrodes and multiple fourth electrodes. The first grooves and second grooves are arranged alternately. The first busbar is located on the side of the first substrate layer away from the first conductive layer, and the second busbar is located on the side of the second substrate layer away from the second conductive layer.

9. The electrochromic film as described in claim 8, characterized in that, The first busbar is also covered with a first adhesive layer, the side of the first adhesive layer near the middle of the electrochromic film is connected to the first base 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 busbar is also covered with a second adhesive layer. 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 busbar is further covered with a first adhesive layer, the first adhesive layer being connected to the first base layer on the side near the middle of the electrochromic film, and the second busbar is further covered with a second adhesive layer, the second adhesive layer being connected to the second base layer on the side near the middle of the electrochromic film, and both the first adhesive layer and the second adhesive layer extending outward to cover the edge of the electrochromic film.

10. An electrochromic device, characterized in that, include: The electrochromic film according to any one of claims 1 to 9; Two glass layers, with the electrochromic film located between the two glass layers.

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