Electrochromic flap, automotive front windshield

Abstract

The application relates to an electrochromic film piece and a front windshield of an automobile, and can control the edge thickness of the electrochromic film piece. The electrochromic film piece comprises a substrate, a plurality of electrochromic areas which are arranged at intervals on the substrate, an edge of each electrochromic area is provided with a conductive grid layer, and the surface of the substrate is provided with a slot corresponding to each electrochromic area. The conductive grid layer forms an electrode area at the slot, and the electrode area is connected with a lead electrode.

Description

Technical Field

[0001] This application relates to the field of electrochromic technology, and in particular to an electrochromic film, and also to an automotive windshield. Background Technology

[0002] Electrochromic devices are typically multilayer films, such as a first substrate layer, a first conductive layer, a dimming and color-changing layer, a second conductive layer, and a second substrate layer stacked sequentially. By introducing voltage or current from an external power source, an electric field can be formed between the first and second conductive layers to drive the dimming and color-changing layer to undergo coloring or fading, thereby causing the electrochromic device to exhibit changes in light transmittance.

[0003] Existing electrochromic films connect multiple electrodes covering the first and second conductive layers via busbars, which are then connected to an external power source via lead-out electrodes. However, because both the positive and negative electrodes at the film's edge require additional busbars and are secured with insulating tape, the film's edge thickness is relatively large, resulting in a film that is not thin and lightweight enough. Utility Model Content

[0004] Therefore, it is necessary to propose an electrochromic film to address the problem of large edge thickness when connecting traditional electrochromic films to lead-out electrodes. Additionally, an automotive windshield is also proposed.

[0005] In a first aspect of this application, an electrochromic film is provided, comprising: a substrate; a plurality of electrochromic regions disposed at intervals on the substrate, wherein each electrochromic region has a conductive mesh layer at its edge, and the surface of the substrate has a groove corresponding to each electrochromic region, wherein the conductive mesh layer forms an electrode region at the groove, and the electrode region is connected to an electrode lead-out.

[0006] In some embodiments, the electrode region includes a first electrode region and a second electrode region, the second electrode region having the opposite polarity to the first electrode region; each electrochromic region is provided with a pair of lead-out electrodes, the pair of lead-out electrodes being a first lead-out electrode and a second lead-out electrode, the first lead-out electrode being connected to the first electrode region, and the second lead-out electrode being connected to the second electrode region; or...

[0007] All electrochromic regions correspond to the same pair of lead-out electrodes. The pair of lead-out electrodes is divided into a first lead-out electrode and a second lead-out electrode. The first lead-out electrode is connected to the first electrode region of each electrochromic region, and the second lead-out electrode is connected to the second electrode region of each electrochromic region.

[0008] In some embodiments, the first electrode region and the second electrode region of each electrochromic region are located on the same side of the electrochromic film.

[0009] In some embodiments, each of the electrochromic regions includes a first metal mesh layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second metal mesh layer stacked sequentially, wherein the conductive mesh layer includes the first metal mesh layer and the second metal mesh layer; the substrate includes a first substrate layer and a second substrate layer, wherein the first substrate layer is stacked on the first metal mesh layer, and the first substrate layer is stacked on the second metal mesh layer; wherein the first metal mesh layer has a first electrode region exposed on one side of the first substrate layer, and the second metal mesh layer has a second electrode region exposed on one side of the second substrate layer; or, the first metal mesh layer has a first electrode region exposed on one side of the second substrate layer, and the second metal mesh layer has a second electrode region exposed on one side of the first substrate layer.

[0010] In some embodiments, the first lead-out electrode includes a first electrical connection portion, which is simultaneously connected to the first electrode region of each electrochromic region. The first electrical connection portion includes a plurality of first electrical connection points, the number of which is the same as the number of the first electrode regions and they are connected in a one-to-one correspondence. The shape of the first electrical connection portion matches the shape of the arrangement trajectory of each of the first electrode regions. And / or, the second lead-out electrode includes a second electrical connection portion, which is simultaneously connected to the second electrode region of each electrochromic region. The second electrical connection portion includes a plurality of second electrical connection points, the number of which is the same as the number of the second electrode regions and they are connected in a one-to-one correspondence. The shape of the second electrical connection portion matches the shape of the arrangement trajectory of each of the second electrode regions.

[0011] In some embodiments, the first lead-out electrode includes a first electrical connection portion, which is simultaneously connected to the first electrode region of each electrochromic region. The first electrical connection portion includes a plurality of first electrical connection points, the number of which is the same as the number of the first electrode regions and they are connected one-to-one. The first lead-out electrode also includes a first contact portion angled to the first electrical connection portion, the first contact portion having a plurality of first contact points, the number of which is the same as the number of the first electrical connection points and they are connected one-to-one; and / or,

[0012] The second lead electrode includes a second electrical connection portion, which is simultaneously connected to the second electrode area of ​​each electrochromic area. The second electrical connection portion includes a plurality of second electrical connection points, the number of which is the same as the number of the second electrode areas and they are connected one-to-one. The second lead electrode also includes a second contact portion that is angled to the second electrical connection portion. The second contact portion is provided with a plurality of second contact points, the number of which is the same as the number of the second electrical connection points and they are connected one-to-one.

[0013] In some embodiments, the electrode region is welded to the lead-out electrode or connected by conductive adhesive.

[0014] A second aspect of this application provides an automotive windshield, comprising: a windshield; a first partition film, a second partition film, and a third partition film, wherein the electrochromic film is provided at a left-right interval on the upper end of the windshield; and the third partition film is provided on the lower end of the windshield.

[0015] In some embodiments, the lead-out electrode connected to the first partition membrane is connected to the edge of the first partition membrane near the edge of the second partition membrane; and / or, the lead-out electrode connected to the second partition membrane is connected to the edge of the second partition membrane near the edge of the first partition membrane.

[0016] In some embodiments, the lead-out electrode connected to the third partition membrane is located below the third partition membrane.

[0017] In this application, the first electrode region and the second electrode region are respectively exposed on both sides of the substrate thickness direction. The first lead-out electrode can be placed at the slot so as to be directly connected to the first electrode region, and the first lead-out electrode can utilize the height space of the electrochromic film within the slot. Similarly, the second lead-out electrode can be placed at the slot so as to be directly connected to the second electrode region, and the second lead-out electrode can utilize the height space of the electrochromic film within the slot. This design eliminates the need for a busbar, thereby reducing the edge thickness of the electrochromic film and making the electrochromic film thinner and lighter. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an electrochromic film and lead-out electrodes according to an embodiment of this application.

[0019] Figure 2 for Figure 1 A schematic diagram showing the distribution of the conductive grid layer in an electrochromic film.

[0020] Figure 3 This is a schematic diagram of a first arrangement of the electrode region of an electrochromic film according to an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of a second arrangement of the electrode region of an electrochromic film according to an embodiment of this application.

[0022] Figure 5 for Figure 1 The cross-sectional view along the central axis AA illustrates a first configuration of the conductive mesh layer of an electrochromic film according to an embodiment of this application.

[0023] Figure 6 for Figure 1 The cross-sectional view along the AA direction illustrates a second configuration of the conductive mesh layer of an electrochromic film according to an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of the structure of the first lead-out electrode according to an embodiment of this application.

[0025] Figure 8 This is a schematic diagram of the structure of the second lead electrode according to an embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the structure of a car windshield according to an embodiment of this application.

[0027] The corresponding numbers of the relevant components in the diagram are as follows:

[0028] 100. Automotive windshield; 1. Electrochromic film; 10. Substrate; 101. Groove; 110. First substrate layer; 120. Second substrate layer; 20. Electrochromic region; 201. Conductive mesh layer; 202. Electrode region; 210. First metal mesh layer; 211. First electrode region; 220. First conductive layer; 230. Electrochromic layer; 240. Second conductive layer; 250. Second metal mesh layer; 251. Second electrode region; 30. 310. Lead-out electrode; 311. First lead-out electrode; 311. First electrical connection part; 3111. First electrical connection point; 312. First contact part; 3121. First contact point; 320. Second lead-out electrode; 321. Second electrical connection part; 3211. Second electrical connection point; 322. Second contact part; 3221. Second contact point; 2. Windshield; 21. Central mounting area; 3. First partition diaphragm; 4. Second partition diaphragm; 5. Third partition diaphragm. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] refer to Figures 1 to 8 One aspect of this application discloses an electrochromic film 1. The electrochromic film 1 can be used, for example, in an automotive windshield 100, see [reference needed]. Figure 9The electrochromic film 1 includes a substrate 10 and a plurality of electrochromic regions 20. The plurality of electrochromic regions 20 are disposed at intervals on the substrate 10. A conductive mesh layer 201 is provided at the edge of each electrochromic region 20, and a groove 101 is provided on the surface of the substrate 10 corresponding to each electrochromic region 20. An electrode region 202 is formed at the groove 101 in the conductive mesh layer 201, and the electrode region 202 is connected to the lead-out electrode 30.

[0035] Optionally, in this application, the substrate 10 includes a first substrate layer 110 and a second substrate layer 120. Multiple electrochromic regions 20 are sandwiched between the first substrate layer 110 and the second substrate layer 120. Both the first substrate layer 110 and the second substrate layer 120 are transparent substrates 10. The "transparent substrate" is an optically grade transparent material, specifically a flexible substrate material, such as polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), cyclic olefin copolymers, or cellulose triacetate. The first substrate layer 110 and the second substrate layer 120 can also be glass substrates.

[0036] refer to Figure 1 and Figure 2 As shown, this application includes three electrochromic regions 20. The three electrochromic regions 20 are arranged alternately from top to bottom. The number of electrochromic regions 20 is not limited to three.

[0037] refer to Figure 1 and Figure 2 A conductive mesh layer 201 is provided at the edge of the electrochromic region 20. In each electrochromic region 20, the conductive mesh layer 201 is at least disposed in the edge region of that electrochromic region 20. The conductive mesh layer 201 disposed in the edge region is used to connect with the lead-out electrode 30 (see...). Figure 1 The electrode 30 is connected to an external power source and the current generated by the external power source is introduced into the conductive mesh layer 201.

[0038] refer to Figure 2 Optionally, the conductive grid layer 201 at the edge of each electrochromic region 20 in this application is n-shaped. The n-shaped conductive grid layer 201 is continuously disposed on three adjacent edges of the electrochromic region 20, allowing charge to be rapidly conducted or introduced from the three edges, resulting in a fast color-changing speed for the electrochromic film 1. Furthermore, the overall n-shaped conductive grid layer 201 on each electrochromic film 1 achieves the technical effect of color changing from the periphery to the center.

[0039] refer to Figure 1 , Figure 3The substrate 10 exposes a local area of ​​the conductive mesh layer 201 through a groove 101, forming an electrode region 202 at the exposed area. The electrode region 202 is directly connected to the lead electrode 30, for example, by welding or by using conductive adhesive.

[0040] In this application, a conductive mesh layer 201 is provided at the edge of the electrochromic region 20. On the one hand, the conductive mesh layer 201 has low resistance, providing a low-resistance electrochromic film 1 design. On the other hand, the conductive mesh layer 201 is located along the edge of the electrochromic region 20, resulting in a large area. The conductive mesh layer 201 can quickly guide or drain the current generated by the external power supply into or out of the electrochromic region 20, thereby increasing the color-changing speed of the electrochromic region 20 and improving the user experience. Furthermore, the electrochromic regions 20 are spaced apart, and the optical transmittance of each color-changing region can be adjusted by separately controlling the electrical signals of the three color-changing regions, thus achieving zoned color-changing control.

[0041] In addition, in this application, the lead electrode 30 is placed at the slot 101 so that it can be directly connected to the electrode region 202. The lead electrode 30 can utilize the height space of the electrochromic film 1 within the slot 101. This design eliminates the need for a busbar, thereby reducing the edge thickness of the electrochromic film 1 and making the electrochromic film 1 thinner and lighter.

[0042] refer to Figure 3 and Figure 4 In some embodiments, electrode region 202 includes a first electrode region 211 and a second electrode region 251, with the second electrode region 251 having the opposite polarity to the first electrode region 211. All electrochromic regions 20 correspond to the same pair of lead-out electrodes 30, which are divided into a first lead-out electrode 310 and a second lead-out electrode 320. The first lead-out electrode 310 is connected to the first electrode region 211 of each electrochromic region 20, and the second lead-out electrode 320 is connected to the second electrode region 251 of each electrochromic region 20. For example, the first electrode region 211 is used to connect to the positive terminal of an external power supply, and the second electrode region 251 is used to connect to the negative terminal of the external power supply. Correspondingly, the first lead-out electrode 310 and the second lead-out electrode 320 have opposite polarities; the first lead-out electrode 310 is used to connect to the positive terminal of the external power supply, and the second lead-out electrode 320 is used to connect to the negative terminal of the external power supply.

[0043] In this embodiment, the electrochromic film 1 specifically includes three electrochromic regions 20, and the three electrochromic regions 20 share a pair of lead-out electrodes 30. Each electrochromic region 20 forms a first electrode region 211 by setting a slot 101, and also forms a second electrode region 251 by setting a slot 101. The first lead-out electrode 310 is configured to connect to all three first electrode regions 211 simultaneously, and the second lead-out electrode 320 is configured to connect to all three first electrode regions 211 simultaneously. The first lead-out electrode 310 and the second lead-out electrode 320 can be understood as both being a "multi-functional" lead-out electrode 30. With this configuration, the electrochromic film 1 does not need to be configured with multiple pairs of lead-out electrodes 30, resulting in a simple structure and small space occupation.

[0044] refer to Figure 3 Optionally, each electrochromic region 20 includes a first metal mesh layer 210, a first conductive layer 220, an electrochromic layer 230, a second conductive layer 240, and a second metal mesh layer 250 stacked sequentially. The conductive mesh layer 201 includes the first metal mesh layer 210 and the second metal mesh layer 250.

[0045] The first metal mesh layer 210 and the second metal mesh layer 250 are metal mesh structures. The metal mesh structure can, for example, be composed of intersecting metal wires.

[0046] The first conductive layer 220 and the second conductive layer 240 are transparent conductive layers. The material of the "transparent conductive layer" can be any transparent conductive material well known to those skilled in the art, such as indium-tin oxide (ITO), aluminum zinc oxide (AZO), fluorine-doped tin oxide (FTO), silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles.

[0047] The electrochromic layer 230 can be a liquid electrochromic layer, a sol-gel electrochromic layer, or a solid electrochromic layer. For example, a solid electrochromic layer can include an ion storage layer, an electrochromic material layer, and an electrolyte layer stacked sequentially.

[0048] refer to Figure 1 , Figure 3The first metal mesh layer 210 and the second metal mesh layer 250 are respectively connected to the first lead-out electrode 310 and the second lead-out electrode 320, that is, the first metal mesh layer 210 is connected to the first lead-out electrode 310, and the second metal mesh layer 250 is connected to the second lead-out electrode 320. The polarities of the first lead-out electrode 310 and the second lead-out electrode 320 are opposite. The first lead-out electrode 310 is connected to the positive terminal of an external power supply, for example, and the second lead-out electrode 320 is connected to the negative terminal of an external power supply. Due to the presence of the first metal mesh layer 210 and the second metal mesh layer 250, after the first lead-out electrode 310 and the second lead-out electrode 320 are connected to the power supply, a voltage can be quickly applied to the first conductive layer 220 and the second conductive layer 240 through the first metal mesh layer 210 and the second metal mesh layer 250, forming an electric field between the first conductive layer 220 and the second conductive layer 240, causing the electrochromic layer 230 to undergo a redox reaction, thereby achieving rapid and uniform color change of the electrochromic film 1.

[0049] In this embodiment, the electrochromic film 1 specifically includes three electrochromic regions 20, and the three electrochromic regions 20 share a pair of lead-out electrodes 30. Each electrochromic region 20 forms a first electrode region 211 by setting a slot 101, and also forms a second electrode region 251 by setting a slot 101. Typically, the slots forming the first electrode region 211 and the second electrode region 251 are located on both sides of the electrochromic region 251, respectively.

[0050] refer to Figure 3 The substrate 10 has slots 101 on both sides, exposing either a first metal mesh layer 210 or a second metal mesh layer 250. A first electrode region 211, exposed on one side of the substrate 10, is formed in the first metal mesh layer 210 through the slots 101, and is connected to a first lead-out electrode 310. A second electrode region 251, exposed on one side of the substrate 10, is formed in the second metal mesh layer 250 through the slots 101, and is connected to a second lead-out electrode 320. In this application, the first electrode regions 211 of each electrochromic region 20 share a single first lead-out electrode 310. The second electrode regions 251 of each electrochromic region 20 share a single second lead-out electrode 320.

[0051] In this application, the first electrode region 211 and the second electrode region 251 are respectively exposed on both sides of the substrate 10 in the thickness direction. The first lead-out electrode 310 can be placed at the slot 101 so as to be directly connected to the first electrode region 211. The first lead-out electrode 310 can utilize the height space of the electrochromic film 1 within the slot 101. Similarly, the second lead-out electrode 320 can be placed at the slot 101 so as to be directly connected to the second electrode region 251. The second lead-out electrode 320 can utilize the height space of the electrochromic film 1 within the slot 101. This design eliminates the need for a busbar, thereby reducing the edge thickness of the electrochromic film 1 and making the electrochromic film 1 thinner and lighter.

[0052] refer to Figure 3 and Figure 4 When the substrate 10 includes a first substrate layer 110 and a second substrate layer 120, the first substrate layer 110 is stacked on a first metal mesh layer 210, and the first substrate layer 110 is stacked on a second metal mesh layer 250. The first electrode region 211 and the second electrode region 251 can be implemented at least in the following ways.

[0053] refer to Figure 3 The first configuration is as follows: the first metal mesh layer 210 has a first electrode region 211 exposed on one side of the first base layer 110, and the second metal mesh layer 250 has a second electrode region 251 exposed on one side of the second base layer 120; the polarity of the second electrode region 251 is opposite to that of the first electrode region 211.

[0054] Specifically, when forming the first electrode region 211, the first base layer 110 is slotted 101 at the position corresponding to the first electrode region 211, such as by laser cutting to remove part of the first base layer 110, thereby forming a slot 101 on the first base layer 110, thereby exposing the first metal mesh layer 210 in a local area and forming the first electrode region 211.

[0055] Similarly, when forming the second electrode region 251, the second base layer 120 is slotted 101 at the position corresponding to the second electrode region 251, such as by laser cutting to remove part of the second base layer 120, thereby forming a slot 101 on the second base layer 120, thereby exposing the second metal mesh layer 250 in a local area and forming the second electrode region 251.

[0056] By cutting the first substrate layer 110 and the second substrate layer 120, the thickness of the local area at the edge of the entire electrochromic film 1 is reduced. This means that when the first lead electrode 310 and the second lead electrode 320 are connected to the film, the edge thickness of the electrochromic film 1 is not increased. Compared to conventional techniques that use busbars to connect multiple electrodes, eliminating the need for busbars allows for a thinner overall film.

[0057] refer to Figure 4 The second configuration is as follows: the first metal mesh layer 210 has a first electrode region 211 exposed on one side of the second base layer 120, and the second metal mesh layer 250 has a second electrode region 251 exposed on one side of the first base layer 110, with the polarity of the second electrode region 251 being opposite to that of the first electrode region 211.

[0058] Specifically, when forming the first electrode region 211, the second base layer 120, the second metal mesh layer 250, the second conductive layer 240, the electrochromic layer 230, and the first conductive layer 220 are respectively slotted 101 at their corresponding positions in the first electrode region 211. For example, laser cutting can be used to remove these layers to form the slots 101, thereby exposing a local area of ​​the first metal mesh layer 210 on one side of the second base layer 120, thus forming the first electrode region 211. Similarly, when forming the second electrode region 251, the first base layer 110, the first metal mesh layer 210, the first conductive layer 220, and the electrochromic layer 230 are respectively slotted 101 at their corresponding positions in the second electrode region 251. For example, laser cutting can be used to remove these layers to form the slots 101, thereby exposing a local area of ​​the second metal mesh layer 250 on one side of the first base layer 110, thus forming the second electrode region 251.

[0059] In the above manner, when forming the first electrode region 211 and the second electrode region 251, the positions of multiple film layers corresponding to the slot 101 are cut off, thereby greatly reducing the thickness of the electrochromic film 1 at the positions of the first electrode region 211 and the second electrode region 251.

[0060] refer to Figure 2 and Figure 5 In one embodiment, the first metal mesh layer 210 may be disposed only in the edge region. In this case, a non-metallic conductive layer is disposed in the other region between the first base layer 110 and the first conductive layer 220, and the material may be exactly the same as the first conductive layer 220 and / or the second conductive layer 240.

[0061] refer to Figure 2 and Figure 5 This is a schematic diagram showing a structure where the metal mesh layer is only disposed in the edge region of the electrochromic region 20. The conductive mesh layer 201 at the edge of each electrochromic region 20 is n-shaped. The conductive mesh layer is n-shaped and is continuously disposed on the three adjacent edges of the electrochromic region 20. Charge is rapidly conducted or introduced from the three edges, resulting in a fast color change speed of the electrochromic film 1. In addition, the conductive mesh layer on each electrochromic film 1 is n-shaped as a whole, which can achieve the technical effect of color change from the periphery to the center.

[0062] refer to Figure 6In another embodiment, taking the first metal mesh layer 210 as an example, the first metal mesh layer 210 can also be completely filled between the first base layer 110 and the first conductive layer 220. The second metal mesh layer 250 is configured in the same way as the first metal mesh layer 210.

[0063] refer to Figure 1 , Figure 7 and Figure 8 In some embodiments, the first lead-out electrode 310 includes a first electrical connection portion 311, which is simultaneously connected to the first electrode region 211 of each electrochromic region 20. The first electrical connection portion 311 includes a plurality of first electrical connection points 3111, the number of which is the same as the number of first electrode regions 211, and each first electrical connection point 3111 is connected to a first electrode region 211 in a one-to-one correspondence. The second lead-out electrode 320 includes a second electrical connection portion 321, which is simultaneously connected to the second electrode region 251 of each electrochromic region 20. The second electrical connection portion 321 includes a plurality of second electrical connection points 3211, the number of which is the same as the number of second electrode regions 251, and each second electrical connection point 3211 is connected to a second electrode region 251 in a one-to-one correspondence.

[0064] In this manner, a first lead-out electrode 310 can be connected to multiple first electrode regions 211, and a second lead-out electrode 320 can be connected to multiple second electrode regions 251. The first lead-out electrode 310 can be connected to the first electrode region 211 by utilizing the height space of the electrochromic film 1 within the slot 101; similarly, the second lead-out electrode 320 can be placed at the slot 101 to be directly connected to the second electrode region 251, utilizing the height space of the electrochromic film 1 within the slot 101. This design eliminates the need for a busbar, thereby reducing the edge thickness of the electrochromic film 1 and making the electrochromic film 1 thinner and lighter.

[0065] In other embodiments, each electrochromic region 20 may be provided with a pair of lead-out electrodes 30. The pair of lead-out electrodes 30 are divided into a first lead-out electrode 310 and a second lead-out electrode 320. The first lead-out electrode 310 is connected to the first electrode region 211, and the second lead-out electrode 320 is connected to the second electrode region 251.

[0066] Specifically, taking a configuration with three electrochromic regions 20 as an example, each electrochromic region 20 has a first electrode region 211 and a second electrode region 251. The first electrode region 211 is connected to a first lead-out electrode 310, and the second electrode region 251 is connected to a second lead-out electrode 320. The first lead-out electrode 310 has a first electrical connection point 3111 and a second electrical connection point 3211.

[0067] refer to Figure 1 , Figure 3 In some embodiments, the first electrode region 211 and the second electrode region 251 of each electrochromic region 20 are located on the same side of the electrochromic film 1, which facilitates the design of the shape of the first lead-out electrode 310 and the second lead-out electrode 320. Taking a configuration with three electrochromic regions 20 as an example, all the first electrode regions 211 and the second electrode regions 251 are located on the same side of the electrochromic film 1. Figure 1 The right edge of the electrochromic film 1. This configuration, with the first lead-out electrode 310 located on the right side of the electrochromic film 1, allows the three first electrical connection points 3111 on the first lead-out electrode 310 to be connected to the three first electrode regions 211. Similarly, the second lead-out electrode 320 is located on the right side of the electrochromic film 1, allowing the three second electrical connection points 3211 on the second lead-out electrode 320 to be connected to the three second electrode regions 251.

[0068] refer to Figure 1 , Figure 7 and Figure 8 In some embodiments, the shape of the first electrical connection portion 311 matches the shape of the arrangement trajectory of each first electrode region 211, and / or the shape of the second electrical connection portion 321 matches the shape of the arrangement trajectory of each second electrode region 251.

[0069] Specifically, taking the first electrode region 211 as an example, the three first electrode regions 211 are arranged along a straight line or arc trajectory, and the corresponding first electrical connection portion 311 is set in a strip shape or arc shape. That is, the first electrical connection portion 311 is designed to mimic the arrangement trajectory of the electrode regions 202, thereby ensuring good contact with the three first electrode regions 211 and the first electrical connection portion 311. The second electrical connection portion 321 is set with reference to the first electrical connection portion 311.

[0070] refer to Figure 1 , Figure 7 and Figure 8 In some embodiments, the first lead-out electrode 310 further includes a first contact portion 312 disposed at an angle to the first electrical connection portion 311. The first contact portion 312 has a plurality of first contact points 3121, and the plurality of first contact points 3121 are the same number as the first electrical connection points 3111 and are connected one-to-one. The second lead-out electrode 320 further includes a second contact portion 322 disposed at an angle to the second electrical connection portion 321. The second contact portion 322 has a plurality of second contact points 3221, and the plurality of second contact points 3221 are the same number as the second electrical connection points 3211 and are connected one-to-one.

[0071] Taking the first lead electrode 310 as an example, multiple first contact points 3121 are used to connect to an external power source. The multiple first contact points 3121 are connected one-to-one with the first electrical connection points 3111, thereby forming multiple conductive lines. Each conductive line connects a first electrode area 211 to an external power source. The second lead electrode 320 is similarly configured, thereby enabling independent control of each electrochromic area 20.

[0072] refer to Figure 9 Another aspect of this application proposes a car windshield 100.

[0073] The windshield 100 of an automobile includes a windshield 2, a first partition film 3, a second partition film 4, and a third partition film 5 disposed on the windshield 2. The first partition film 3 and the second partition film 4 are disposed at an interval on the upper part of the windshield 2; the third partition film 5 is disposed on the lower part of the windshield 2.

[0074] In this embodiment, the cross-sectional structures of the first partition membrane 3, the second partition membrane 4, and the third partition membrane 5 are as follows: Figure 3 or Figure 4 Among them, the shape of the first partition membrane 3 is similar to... Figure 1 The electrochromic films 1 in the windshield 2 are identical in shape. The second partition film 4 and the first partition film 3 are symmetrically arranged about the center line C in the left-right direction of the windshield 2. The multiple electrochromic zones 20 of the third partition film 5 are arranged at intervals along the left-right direction of the windshield 2.

[0075] The areas on the windshield 2 where the first partition film 3, the second partition film 4, and the third partition film 5 are set are all color-changing areas. The area between the first partition film 3 and the second partition film 4 is the central mounting area 21, which is used to install integrated cameras, sensors, and other components. The other areas are ordinary viewing glass areas.

[0076] The first section diaphragm 3 and the second section diaphragm 4 are both used for sunshade to prevent glare and avoid affecting driving. The third section diaphragm 5 can be used for the head-up display. (A head-up display, also known as a head-up display system, is a driver-centric, blind-operated, multi-functional instrument panel. Its function is to project important driving information such as speed and navigation onto the windshield in front of the driver, allowing the driver to see important driving information such as speed and navigation without looking down or turning their head.)

[0077] The automotive windshield of this application features multiple partitioned films to meet various functional requirements, such as sun shading and head-up display. All partitioned films utilize the low-resistance electrochromic film 1 described above, and the conductive mesh layer 201 can also be arranged in the visible area, providing a large area and significantly improving the color-changing speed.

[0078] refer to Figure 9 In some embodiments, the lead-out electrode 30 connected to the first partition membrane 3 is connected to the edge of the first partition membrane 3 near the second partition membrane 4; and / or, the lead-out electrode 30 connected to the second partition membrane 4 is connected to the edge of the second partition membrane 4 near the first partition membrane 3.

[0079] Specifically, in conjunction with reference Figure 3 , Figure 8 The first electrode region 211 and the second electrode region 251 of the first partition membrane 3 are both located at the right end of the first partition membrane 3, near the central mounting region 21; the first electrode region 211 and the second electrode region 251 of the second partition membrane 4 are located at the left end of the second partition membrane 4, near the central mounting region 21.

[0080] In this way, the lead-out electrode 30 connected to the first partition diaphragm 3 and the lead-out electrode 30 connected to the second partition diaphragm 4 can be arranged in the central mounting area 21 without affecting the light transmission requirements of other visible areas.

[0081] In this embodiment, the lead-out electrode 30 connected to the first partition membrane 3 and the lead-out electrode 30 connected to the second partition membrane 4 are both "all-in-one" electrodes as described in the previous embodiment.

[0082] refer to Figure 9 In some embodiments, the lead-out electrode 30 connected to the third partition membrane 5 is located below the third partition membrane 5.

[0083] Specifically, each conductive mesh layer 201 in the third partition film 5 is located at the lower edge of the third partition film 5, and the conductive mesh layer 201 extends in an arc shape in the left-right direction of the windshield 2. The third partition film 5 specifically includes three electrochromic regions 20 arranged at intervals along the left-right direction of the windshield 2, and the conductive mesh layer 201 of each electrochromic region 20 is disposed at the lower edge of the third partition film 5. In this way, the lead-out electrodes 30 of each electrochromic region 20 of the third partition film 5 can be concentrated at the lower end of the windshield 2. In this embodiment, each of the multiple electrochromic regions 20 of the third partition film 5 is provided with a lead-out electrode 30.

[0084] Unlike the third partition film 5, the multiple electrochromic elements of the first partition film 3 and the second partition film 4 are arranged at intervals in the vertical direction of the windshield 2, and the conductive grid layer 201 at the edge of each electrochromic area 20 is n-shaped.

[0085] In some embodiments, the windshield 2 includes a first glass and a second glass (not shown), and a first partition diaphragm 3, a second partition diaphragm 4 and a third partition diaphragm 5 are located between the first glass and the second glass.

[0086] In this application, the windshield 2 is a double-layered glass, with three partitioned films sandwiched between the first and second glass layers using a lamination process. None of the three partitioned films in this application require busbars, have a small thickness, and reduce the risk of cracking when the first and second glass layers are laminated.

[0087] In some embodiments, the edge of the windshield 2 is provided with a shielding area (not shown) that shields the conductive mesh layer 201 on the first partition film 3, the second partition film 4 and the third partition film 5, thereby improving the aesthetics.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electrochromic film, characterized in that, include: Base; Multiple electrochromic regions are spaced apart on the substrate. Each electrochromic region has a conductive mesh layer at its edge, and the surface of the substrate has a groove corresponding to each electrochromic region. The conductive mesh layer forms an electrode region at the groove, and the electrode region is connected to a lead-out electrode.

2. The electrochromic film according to claim 1, characterized in that, The electrode region includes a first electrode region and a second electrode region, wherein the polarity of the second electrode region is opposite to that of the first electrode region. Each electrochromic region has a corresponding pair of leads, which are divided into a first lead and a second lead. The first lead is connected to the first electrode region, and the second lead is connected to the second electrode region; or... All electrochromic regions correspond to the same pair of lead-out electrodes. The pair of lead-out electrodes is divided into a first lead-out electrode and a second lead-out electrode. The first lead-out electrode is connected to the first electrode region of each electrochromic region, and the second lead-out electrode is connected to the second electrode region of each electrochromic region.

3. The electrochromic film according to claim 2, characterized in that, The first electrode region and the second electrode region of each electrochromic region are located on the same side of the electrochromic film.

4. The electrochromic film according to claim 2, characterized in that, Each of the electrochromic regions includes a first metal mesh layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second metal mesh layer stacked sequentially, wherein the conductive mesh layer includes the first metal mesh layer and the second metal mesh layer; the substrate includes a first substrate layer and a second substrate layer, wherein the first substrate layer is stacked on the first metal mesh layer, and the first substrate layer is stacked on the second metal mesh layer; wherein the first metal mesh layer has a first electrode region exposed on one side of the first substrate layer, and the second metal mesh layer has a second electrode region exposed on one side of the second substrate layer; or, the first metal mesh layer has a first electrode region exposed on one side of the second substrate layer, and the second metal mesh layer has a second electrode region exposed on one side of the first substrate layer.

5. The electrochromic film according to any one of claims 2 to 4, characterized in that, The first lead-out electrode includes a first electrical connection portion, which is simultaneously connected to the first electrode region of each electrochromic region. The first electrical connection portion includes a plurality of first electrical connection points, the number of which is the same as the number of the first electrode regions and they are connected in a one-to-one correspondence. The shape of the first electrical connection portion matches the shape of the arrangement trajectory of each of the first electrode regions; and / or, The second lead electrode includes a second electrical connection portion, which is simultaneously connected to the second electrode region of each electrochromic region. The second electrical connection portion includes a plurality of second electrical connection points, the number of which is the same as the number of the second electrode regions and they are connected in a one-to-one correspondence. The shape of the second electrical connection portion matches the shape of the arrangement trajectory of each second electrode region.

6. The electrochromic film according to any one of claims 2 to 4, characterized in that, The first lead-out electrode includes a first electrical connection portion, which is simultaneously connected to the first electrode region of each electrochromic region. The first electrical connection portion includes a plurality of first electrical connection points, the number of which is the same as the number of the first electrode regions and they are connected one-to-one. The first lead-out electrode also includes a first contact portion angled to the first electrical connection portion, with a plurality of first contact points on the first contact portion. The plurality of first contact points are the same in number as the number of first electrical connection points and they are connected one-to-one; and / or, The second lead electrode includes a second electrical connection portion, which is simultaneously connected to the second electrode area of ​​each electrochromic area. The second electrical connection portion includes a plurality of second electrical connection points, the number of which is the same as the number of the second electrode areas and they are connected one-to-one. The second lead electrode also includes a second contact portion that is angled to the second electrical connection portion. The second contact portion is provided with a plurality of second contact points, the number of which is the same as the number of the second electrical connection points and they are connected one-to-one.

7. The electrochromic film according to claim 1, characterized in that, The electrode area is welded to the lead-out electrode or connected by conductive adhesive.

8. A car windshield, characterized in that, include: Windshield; The first partition film, the second partition film, and the third partition film are all electrochromic films as described in any one of claims 1-7, wherein the first partition film and the second partition film are disposed at an interval on the upper end of the windshield; and the third partition film is disposed at the lower end of the windshield.

9. The automotive windshield according to claim 8, characterized in that, The lead-out electrode connected to the first partition membrane is connected to the edge of the first partition membrane near the edge of the second partition membrane; and / or, the lead-out electrode connected to the second partition membrane is connected to the edge of the second partition membrane near the edge of the first partition membrane.

10. The automotive windshield according to claim 8, characterized in that, The lead-out electrode connected to the third partition membrane is located below the third partition membrane.

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