Electrochromic diaphragm and electrochromic device

Abstract

The application provides an electrochromic film and an electrochromic device. The electrochromic film comprises a film body, the film body has a plurality of color-changing areas; an edge of the film body is provided with a conductive area, and the conductive area extends at least part of the edge of each color-changing area; and a conductive component is arranged on the conductive area and used for electrically connecting the color-changing area. The film body has a plurality of color-changing areas. In actual processing and manufacturing, the edge of the whole film body is processed to form the required conductive area in one processing procedure. The conductive area covers at least part of the edge of each color-changing area, and the conductive component can be arranged on each color-changing area through the conductive area. Therefore, the processing procedure can be reduced, and the manufacturing cost can be reduced.

Description

Technical Field

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

[0002] Currently, some automotive windshields incorporate electrochromic devices within their glass interlayer. Adjusting the light transmittance of these devices regulates the windshield's shading effect. Furthermore, to achieve different shading effects in different areas of the windshield, multiple sequentially arranged color-changing zones are typically incorporated into the electrochromic device. Each zone can change color independently, thus enabling zoned adjustment of the windshield's light transmittance.

[0003] In the above structure, each color-changing area of ​​the electrochromic device needs to be provided with lead-out electrodes for electrical connection with an external power source; however, the existing manufacturing process involves processing each color-changing area separately to form an electrode connection area, which requires multiple processing steps, resulting in higher manufacturing costs and higher processing precision requirements. Utility Model Content

[0004] The purpose of this application is to provide an electrochromic film and an electrochromic device, which aims to solve the problem that the existing electrochromic film requires processing each color-changing area separately to form an electrode connection area, resulting in many processing steps, high manufacturing cost, and high processing precision requirements.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide an electrochromic film, including a film body having a plurality of color-changing regions; a conductive region is provided on the edge of the film body, and the conductive region extends at least a portion of the edge of each color-changing region; a conductive component is disposed in the conductive region and is used to electrically connect with the color-changing region.

[0007] The beneficial effects of the electrochromic film of this application are as follows: the film body has multiple color-changing areas, and in actual manufacturing, only one processing step is needed to process the entire edge of the film body to form the required conductive area, which covers at least part of the edge of each color-changing area; each color-changing area can be equipped with a conductive component through the conductive area; no multiple processing steps are required, effectively reducing manufacturing costs. Furthermore, the conductive area only needs to extend along the edge of the film body to each color-changing area, requiring low processing precision and reducing manufacturing difficulty.

[0008] In some embodiments, the conductive region includes a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes have opposite polarities and are arranged alternately.

[0009] In some embodiments, the membrane body includes, along its thickness direction, a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer stacked sequentially; the edges of the membrane body are alternately provided with a first groove and a second groove; the first groove penetrates the first base layer, the first conductive layer, and the electrochromic layer to expose the second conductive layer to form the first electrode; the second groove penetrates the second base layer, the second conductive layer, and the electrochromic layer to expose the first conductive layer to form the second electrode; the conductive component is electrically connected to the second conductive layer in the first groove, and the conductive component is electrically connected to the first conductive layer in the second groove.

[0010] In some embodiments, a separator is provided between two adjacent color-changing regions, the separator penetrating the first conductive layer and the second conductive layer along the thickness direction of the film body.

[0011] In some embodiments, the conductive component includes a plurality of first busbars and a plurality of second busbars, wherein the first busbars and the second busbars are respectively disposed on both sides of the diaphragm body in the thickness direction; wherein,

[0012] Each of the color-changing areas is provided with a first bus bar on its corresponding conductive area, and the first bus bar is electrically connected to a plurality of first electrodes of the corresponding color-changing area;

[0013] Each color-changing region is provided with a second bus bar on its corresponding conductive area, and the second bus bar is electrically connected to a plurality of second electrodes of its corresponding color-changing region.

[0014] In some embodiments, each of the color-changing areas is provided with a first lead-out electrode and a second lead-out electrode;

[0015] The first lead-out electrode is connected to the first busbar in the color-changing area, or the first lead-out electrode is connected to the first busbar through a first conductive element;

[0016] The second lead electrode is connected to the second busbar in the color-changing area, or the second lead electrode is connected to the second busbar through a second conductive element.

[0017] In some embodiments, the first busbar is integrally formed with the first conductive element, and / or, along the thickness direction of the diaphragm body, a first insulating element is provided between the first busbar and its adjacent first conductive element.

[0018] In some embodiments, the second busbar is integrally formed with the second conductive element, and / or, along the thickness direction of the diaphragm body, a second insulating element is provided between the second busbar and its adjacent second conductive element.

[0019] In some embodiments, the membrane body includes a plurality of color-changing regions arranged from top to bottom, and the conductive regions are located at the upper edge, left edge and right edge of the membrane body.

[0020] In some embodiments, the membrane body includes a plurality of color-changing regions arranged sequentially from left to right, and the conductive region is located at the upper edge or lower edge of the membrane body.

[0021] Secondly, embodiments of this application also provide an electrochromic device, including the aforementioned electrochromic film.

[0022] In some embodiments, the electrochromic device has a visible area and a non-visible area, the membrane body being at least partially located within the visible area, and the conductive area being located within the non-visible area. Attached Figure Description

[0023] 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an electrochromic device with distributed electrochromic films provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a membrane body according to another embodiment of this application; wherein, conductive regions are provided on the upper edge, left edge and right edge of the membrane body;

[0026] Figure 3 This is a schematic diagram of the structure of an electrochromic film provided in another embodiment of this application; wherein, a conductive component is disposed on the conductive area of ​​the film body;

[0027] Figure 4 A schematic cross-sectional view of an electrochromic film in a conductive region, provided in another embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the diaphragm body at the partition portion, provided in another embodiment of this application.

[0029] Figure 6This is a schematic diagram of the structure of an electrochromic device with distributed electrochromic films provided in another embodiment of this application, wherein each first lead-out electrode and each second lead-out electrode are disposed in the mounting area.

[0030] The labels for the attached figures are as follows:

[0031] 1. Diaphragm body; 110. Color-changing area;

[0032] 101. First substrate layer; 102. First conductive layer; 103. Electrochromic layer;

[0033] 1031, Color-changing material layer; 1032, Electrolyte layer; 1033, Ion storage layer;

[0034] 104. Second conductive layer; 105. Second base layer;

[0035] 2. Conductive component; 210. First busbar; 220. Second busbar;

[0036] 3. Conductive region; 310. First electrode; 320. Second electrode;

[0037] 4. First groove; 5. Second groove; 6. First lead-out electrode; 7. Second lead-out electrode;

[0038] 8. Visible area; 9. Non-visible area; 10. Separation section; 11. Installation area. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0041] Furthermore, in the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] refer to Figure 1 , Figure 2 and Figure 3 One embodiment of this application provides an electrochromic film, including a film body 1 and a conductive component 2. The film body 1 has a plurality of color-changing regions 110. The edge of the film body 1 is provided with a conductive region 3, and the conductive region 3 extends at least part of the edge of each color-changing region 110. The conductive component 2 is disposed in the conductive region 3 and is used to electrically connect with the color-changing region 110.

[0045] Specifically, the diaphragm body 1 contains an electrochromic material. Under the influence of an external voltage, the diaphragm body 1 undergoes a reversible color change, thereby adjusting its transmittance and enabling it to transmit light or block light and prevent glare. The diaphragm body 1 has multiple color-changing zones 110. By controlling the electrical signals of each color-changing zone 110 individually, the optical transmittance of each zone can be adjusted separately, achieving better color-changing control of the electrochromic diaphragm.

[0046] The conductive region 3 is disposed at the edge of the diaphragm body 1. The conductive region 3 is a region for setting the conductive component 2. The conductive component 2 disposed on the conductive region 3 is connected to an external power supply device to apply voltage to the diaphragm body 1.

[0047] Understandably, a conductive region 3 with a sufficiently long path is configured along the edge of the diaphragm body 1, so that the edge of each color-changing region 110 is distributed with a conductive region 3; each color-changing region 110 can be individually controlled for color change by setting a conductive component 2 on the corresponding conductive region 3.

[0048] refer to Figure 2 and Figure 3 Although the membrane body 1 of this application has multiple color-changing areas 110, in actual processing, the required conductive area 3 is formed by processing the edge of the entire membrane body 1 in one processing step. The conductive area 3 covers at least part of the edge of each color-changing area 110, and each color-changing area 110 can be equipped with a conductive component 2 through the conductive area 3; no multiple processing steps are required, which effectively reduces the manufacturing cost.

[0049] In addition, both the conductive region 3 and the conductive component 2 are located at the edge of the membrane body 1, which reduces the occupation of the color-changing area of ​​the membrane body 1 and improves the utilization rate of the membrane area.

[0050] refer to Figure 2 and Figure 3 In some embodiments, the conductive region 3 includes a plurality of first electrodes 310 and a plurality of second electrodes 320, wherein the first electrodes 310 and the second electrodes 320 have opposite polarities and are arranged alternately.

[0051] Specifically, multiple first electrodes 310 are located on one side of the membrane body 1 in the thickness direction, and multiple second electrodes 320 are located on the other side of the membrane body 1 in the thickness direction, thereby forming a multi-electrode structure in the edge region of the membrane body 1, which is beneficial to accelerate the color change speed of the membrane body 1.

[0052] Each color-changing area 110 is connected to the positive and negative terminals of an external power supply via a first electrode 310 and a second electrode 320 located on both sides, thereby providing voltage to the color-changing area 110.

[0053] refer to Figures 2 to 4 In some embodiments, the membrane body 1 includes, along its thickness direction, a first base layer 101, a first conductive layer 102, an electrochromic layer 103, a second conductive layer 104, and a second base layer 105 stacked sequentially; the edges of the membrane body 1 are alternately provided with a first groove 4 and a second groove 5; the first groove 4 penetrates the first base layer 101, the first conductive layer 102, and the electrochromic layer 103 to expose the second conductive layer 104 to form a first electrode 310; the second groove 5 penetrates the second base layer 105, the second conductive layer 104, and the electrochromic layer 103 to expose the first conductive layer 102 to form a second electrode 320;

[0054] The conductive component 2 is electrically connected to the second conductive layer 104 in the first groove 4, and the conductive component 2 is electrically connected to the first conductive layer 102 in the second groove 5.

[0055] In some embodiments, the first substrate 101 and the second substrate 105 are selected as transparent and flexible substrates with light transmittance, such as polyethylene glycol terephthalate (PET), polycarbonate (PC), etc., and may also be set as glass substrates. The first conductive layer 102 and the second conductive layer 104 are set as indium-tin oxide (ITO), aluminum zinc oxide (AZO), or fluorine-doped tin oxide (FTO), which have good conductivity.

[0056] The electrochromic layer 103 includes a color-changing material layer 1031 (Ion Conductor, IC), an electrolyte layer 1032, and an ion storage layer 1033 (Electrochromic Layer, EC) stacked sequentially. The materials of the color-changing material layer 1031, the electrolyte layer 1032, and the ion storage layer 1033 can be materials available in the prior art, which will not be described in detail in this application.

[0057] refer to Figure 4 In some embodiments, for the edge of the diaphragm body 1, a first groove 4 is formed by etching or laser engraving the first base layer 101, the first conductive layer 102 and the electrochromic layer 103; a second groove 5 is formed by etching or laser engraving the second base layer 105, the second conductive layer 104 and the electrochromic layer 103; then, the first groove 4 and the second groove 5 are respectively located on both sides of the diaphragm body 1 in the thickness direction.

[0058] The number of the first groove 4 and the second groove 5 are multiple, and can be any number greater than the value of two, which can be set according to the actual situation.

[0059] The second conductive layer 104 exposed in the first groove 4 forms the first electrode 310, and the conductive component 2 disposed in the first groove 4 is electrically connected to the first electrode 310.

[0060] The first conductive layer 102 exposed in the second groove 5 forms the second electrode 320, and the conductive component 2 disposed in the second groove 5 is electrically connected to the second electrode 320. Through the above operation, by applying a voltage to the conductive component, charge is conducted from the first electrode 310 to the second conductive layer 104, and charge is conducted from the second electrode 320 to the first conductive layer 102. Thus, a voltage difference is formed between the first conductive layer 102 and the second conductive layer 104, causing an oxidation-reduction reaction to occur in the electrochromic layer 103 between the first conductive layer 102 and the second conductive layer 104, and the film exhibits an electrochromic phenomenon.

[0061] refer to Figures 1 to 3 , Figure 5 In some embodiments, a partition 10 is provided between two adjacent color-changing areas 110, and the partition 10 penetrates the first conductive layer 102 and the second conductive layer 104 along the thickness direction of the film body 1.

[0062] Specifically, the partition 10 is formed inside the membrane body 1, and the partition 10 only penetrates the first conductive layer 102, the electrochromic layer 103, and the second conductive layer 104, that is, the first substrate layer 101 and the second substrate layer 105 are both complete substrate layers; the electrochromic layer 103 is divided into multiple independent color-changing regions by the partition 10, thereby forming at least multiple color-changing regions 110 with dimming function inside the membrane body 1, while the first substrate layer 101 and the second substrate layer 105 located on the outside of the membrane body 1 remain complete structural layers; therefore, this application is A partition 10 is provided within a diaphragm body 1 to divide it into multiple color-changing areas 110. The partition 10 forms a separation region between two adjacent color-changing areas 110. The partition 10 only penetrates the inner layer structure of the diaphragm body 1. The inner and outer sides of the diaphragm body 1 are still the complete first base layer 101 and second base layer 105. That is, the structural integrity of the first base layer 101 and the second base layer 105 is intact. The separation region located inside the diaphragm body 1 is not easily observed from the outside, effectively reducing the impact of the separation region between the color-changing areas 110 on the structural integrity and appearance of the diaphragm body 1.

[0063] Depending on the number of color-changing areas 110 required within a single diaphragm body 1, one or more partitions 10 can be provided within the diaphragm body 1; and by adjusting the position of each partition 10, the size of each color-changing area 110 can be adjusted accordingly.

[0064] It should be noted that the separating part 10 is a cutting groove provided inside the diaphragm body 1. The cutting groove is used to cut the first conductive layer 102 and the second conductive layer 104, so that the first conductive layer 102 between two adjacent color-changing areas 110 is separated, and the second conductive layer 104 between two adjacent color-changing areas 110 is separated, so as to enable different voltage signals to be input to each color-changing area 110.

[0065] For example, the separator 10 includes a cutting groove that sequentially penetrates the first conductive layer 102, the electrochromic layer 103, and the second conductive layer 104 along the thickness direction of the membrane body 1. Alternatively, the separator 10 includes two overlapping cutting grooves along the thickness direction of the membrane body 1, one cutting groove penetrating the first conductive layer 102 and the other cutting groove penetrating the second conductive layer 104, while the electrochromic layer 103 located between the two cutting grooves is not cut. Preferably, the separator 10 includes a cutting groove that sequentially penetrates the first conductive layer 102, the electrochromic layer 103, and the second conductive layer 104 along the thickness direction of the membrane body 1.

[0066] In one specific embodiment, the partition 10 is formed by laser cutting. Along the thickness direction of the membrane body 1, the first conductive layer 102, the electrochromic layer 103 and the second conductive layer 104 are removed, while the first base layer 101 and the second base layer 105 are retained. In this way, a membrane body 1 can be processed into a membrane with multiple color-changing regions 110.

[0067] The specific principle of laser cutting is as follows: the laser cutting effect is related to the absorption depth of the material to the wavelength. Different materials have different absorption rates for specific wavelengths of laser. By selecting a suitable wavelength of laser and adjusting the corresponding process parameters, the emitted laser does not reach the damage threshold of the outer first substrate layer 101 and the second substrate layer 105, but it can damage the inner first conductive layer 102, electrochromic layer 103 and the second conductive layer 104. Thus, the integrity of the outer first substrate layer 101 and the second substrate layer 105 can be preserved through laser cutting. The separation area formed by the separation part 10 is located inside the membrane body 1, making the separation area inconspicuous from the outside and reducing the impact of the separation area on the structure and appearance of the membrane body 1.

[0068] refer to Figure 5 In one specific embodiment of this application, the first base layer 101 and the second base layer 105 are made of PET, and the first conductive base layer 22 and the second conductive base layer 42 are made of ITO. Then, during the fabrication of the partition 10, the laser energy emitted by the laser does not reach the damage threshold of the PET material located on the outside, but can damage the internal ITO, the color-changing material layer 1031, the electrolyte layer 1032 and the ion storage layer 1033.

[0069] refer to Figures 2 to 4 In some embodiments, the conductive component 2 includes a plurality of first busbars 210 and a plurality of second busbars 220, wherein the first busbars 210 and the second busbars 220 are respectively disposed on both sides of the diaphragm body 1 in the thickness direction; wherein,

[0070] Each color-changing area 110 is provided with a first bus bar 210 on its corresponding conductive area 3, and the first bus bar 210 is electrically connected to a plurality of first electrodes 310 of its corresponding color-changing area 110.

[0071] Each color-changing area 110 is provided with a second busbar 220 on its corresponding conductive area 3, and the second busbar 220 is electrically connected to a plurality of second electrodes 320 of its corresponding color-changing area 110.

[0072] Specifically, a first busbar 210 and a second busbar 220 are respectively provided on both sides of the conductive area 3 at the edge of each color-changing area 110. (Reference) Figure 4 The first busbar 210 located on one side of the color-changing area 110 is at least partially electrically connected to the second conductive layer 104 within the plurality of first grooves 4, that is, the first busbar 210 is electrically connected to the plurality of first electrodes 310. The second busbar 220 located on the other side of the color-changing area 110 is at least partially electrically connected to the first conductive layer 102 within the plurality of second grooves 5, that is, the second busbar 220 is electrically connected to the plurality of second electrodes 320. The first busbar 210 and the second busbar 220 may be, but are not limited to, conductive copper foil, conductive adhesive, and conductive resin, or other conductive materials; thereby, a multi-electrode structure can be formed in the conductive region 3 at the edge of the color-changing area 110, accelerating the color-changing speed of the color-changing area 110.

[0073] refer to Figure 6 In some embodiments, each color-changing area 110 is provided with a first lead-out electrode 6 and a second lead-out electrode 7;

[0074] The first lead-out electrode 6 is connected to the first busbar 210 of the color-changing area 110, or the first lead-out electrode 6 is connected to the first busbar 210 through a first conductive element. The second lead-out electrode 7 is connected to the second busbar 220 of the color-changing area 110, or the second lead-out electrode 7 is connected to the second busbar 220 through a second conductive element.

[0075] Understandably, the first busbar 210 is connected to multiple first electrodes 310 at the edge of the color-changing area 110, and the first busbar 210 is used to connect to the first lead electrode 6; the second busbar 220 is connected to multiple second electrodes 320 at the edge of the color-changing area, and the second busbar 220 is used to connect to the second lead electrode 7; then, each color-changing area 110 is connected to the positive and negative terminals of the external power supply device through the first lead electrode 6 and a second lead electrode 7, so that the color-changing area 110 and the external power supply device are electrically connected, and each color-changing area 110 can be individually controlled for color change.

[0076] In some examples, the first lead electrode 6 can be directly disposed on the first busbar 210.

[0077] In other examples, the first lead electrode 6 is not convenient to be directly set on the first busbar 210 due to the connection requirements with the external power supply device. Instead, a first conductive element extending toward the first lead electrode 6 can be set on the first busbar 210, so that the first busbar 210 and the first lead electrode 6 can be indirectly electrically connected through the first conductive element.

[0078] Specifically, the first busbar 210 is integrally formed with the first conductive element; the connection strength is higher and it is beneficial to reduce assembly steps.

[0079] In some embodiments, a first insulating element is disposed between the first busbar 210 and its adjacent first conductive element along the thickness direction of the diaphragm body 1.

[0080] Understandably, the first conductive element is conductive and may include, but is not limited to, conductive copper foil, conductive adhesive, and conductive resin, or other conductive materials. The first conductive element is disposed between the first lead electrode 6 and the first busbar 210 to which it is to be connected; there is a problem that the first conductive element may come into contact with other first busbars 210 at the edges of the color-changing areas 110, causing a short circuit and resulting in telecommunications crosstalk between different color-changing areas; therefore, along the extension path of the first conductive element, a first insulating element is disposed between the first busbar 210 adjacent to the first conductive element and the first conductive element to prevent short circuits. For example, the first insulating element may be insulating tape, which covers the outer surface of the first conductive element.

[0081] In some examples, the second lead electrode 7 can be directly mounted on the second busbar 220.

[0082] In other examples, the second lead electrode 7 is not convenient to be directly set on the second busbar 220 due to the connection requirements with the external power supply device. Instead, a second conductive element extending toward the second lead electrode 7 can be set on the second busbar 220, so that the second busbar 220 and the second lead electrode 7 can be indirectly electrically connected through the second conductive element.

[0083] Specifically, the second busbar 220 is integrally formed with the second conductive component; the connection strength is higher and it helps to reduce assembly steps.

[0084] In some embodiments, a second insulating element is disposed between the second busbar 220 and its adjacent second conductive element along the thickness direction of the diaphragm body 1.

[0085] Understandably, the second conductive element is conductive and may include, but is not limited to, conductive copper foil, conductive adhesive, and conductive resin, or other conductive materials. The second conductive element is disposed between the second lead electrode 7 and the second busbar 220 to which it is to be connected. There is a problem that the second conductive element may come into contact with other second busbars 220 at the edges of the color-changing area 110, causing a short circuit and resulting in telecommunications crosstalk between different color-changing areas. Therefore, along the extension path of the second conductive element, a second insulating element is disposed between the second busbar 220 adjacent to the second conductive element and the second conductive element to prevent short circuits. For example, the second insulating element may be insulating tape, which covers the outer surface of the second conductive element.

[0086] refer to Figure 1 and Figure 6 In some embodiments, the diaphragm body 1 includes a plurality of color-changing areas 110 arranged from top to bottom, and conductive areas 3 are disposed on the upper edge, left edge and right edge of the diaphragm body 1.

[0087] The diaphragm body 1 of this application is specifically applied to the windshield of an automobile. The diaphragm body 1 is set on the top two sides of the windshield to form the sunshade area for the driver and passenger seats of the windshield. Furthermore, by adjusting the light transmittance of the diaphragm body 1, the sunshade effect of the windshield of the automobile can be adjusted to prevent the sunlight from being glaring and affecting driving.

[0088] The number of color-changing areas 110 in the diaphragm body 1 can be 2, 3 or more arranged from top to bottom; it can be selectively set according to requirements.

[0089] Preferably, the diaphragm body 1 forms three color-changing zones 110 arranged from top to bottom, and the height of each color-changing zone 110 decreases sequentially from top to bottom. Understandably, the diaphragm body 1 is located at the top of the windshield of a car to form a sunshade area. The color-changing zone 110 closer to the top of the diaphragm body 1 has higher requirements for sunshade, and needs to have a larger area and lower light transmittance to effectively block sunlight from shining directly into the user's eyes. Consequently, the height of the color-changing zone 110 closer to the top of the windshield is larger, so as to form a larger light-blocking area.

[0090] In this embodiment, the multiple color-changing areas 110 of the membrane body 1 are arranged from top to bottom, and the conductive area 3 extends along the upper edge, left edge and right edge of the membrane body 1 to cover each color-changing area 110.

[0091] refer to Figure 1 and Figure 6 In some embodiments, the diaphragm body 1 includes a plurality of color-changing regions 110 arranged sequentially from left to right, and the conductive region 3 is disposed at the upper edge or lower edge of the diaphragm body 1.

[0092] Specifically, the diaphragm body 1 can also be located at the bottom of the windshield. The diaphragm body 1 is used for a head-up display (HUD), also known as a head-up display system, which refers to a driver-centric, blind-operated, multi-functional instrument panel. The function of the head-up display is to project important driving information such as vehicle speed, RPM, and navigation onto the lower side of the driver's windshield, allowing the driver to see it at eye level. This enables the driver to see important driving information such as speed and navigation without looking down or turning their head, thus allowing them to focus more on road conditions.

[0093] The number of color-changing areas 110 in the diaphragm body 1 can be 2, 3 or more arranged from left to right; it can be selectively set according to requirements.

[0094] Preferably, the diaphragm body 1 includes three color-changing areas 110, with one color-changing area 110 located in the center of the diaphragm body 1, and the other two color-changing areas 110 respectively located on both sides of the central color-changing area 110, arranged symmetrically from left to right. Understandably, when the electrochromic device is applied to a car windshield, the color-changing area 110 on the left forms the driver's head-up display area, mainly used to display core driving data, such as vehicle speed, engine speed (for gasoline vehicles), remaining range, navigation route, etc.; the color-changing area 110 on the right forms the passenger's head-up display area, mainly used to display entertainment media information, such as currently playing songs, incoming call notifications, weather, etc.; the color-changing area 110 in the middle forms the central head-up display area, used to display dynamic or interactive information such as multi-tasking reminders, multimedia control (feedback during voice interaction), etc. By reasonably adjusting the electrical signals of each color-changing area 110, the optical transmittance of each color-changing area 110 can be distributed and adjusted, achieving a better head-up display effect.

[0095] In this embodiment, the multiple color-changing areas 110 of the membrane body 1 are arranged sequentially from left to right, and the conductive area 3 is located at the upper or lower edge of the membrane body 1, which can cover each color-changing area 110.

[0096] refer to Figure 1 and Figure 6 Secondly, embodiments of this application also provide an electrochromic device 1000, including the electrochromic film described above.

[0097] The electrochromic device 1000 can be any of the following: automotive windshield, automotive sunroof, automotive side window, and building doors and windows.

[0098] refer to Figure 1In this application, the electrochromic device 1000 is a windshield of a vehicle; the electrochromic device 1000 has a plurality of electrochromic films, at least one of which changes color and transmittance to form a sunshade area at the top of the windshield, and at least one of which changes color and transmittance to serve as a head-up display area at the bottom of the windshield.

[0099] The electrochromic device 1000 also includes two base layers constituting the vehicle window: an inner layer (facing the inside of the vehicle) and an outer layer (facing the outside of the vehicle), with an electrochromic film disposed between the two base layers; the base layers are translucent and are preferably glass.

[0100] In some embodiments, the electrochromic device 1000 is a windshield of a vehicle, and the electrochromic device 1000 has a visible area 8 and a non-visible area 9; the diaphragm body 1 is at least partially located in the visible area 8, and the conductive area 3 is located in the non-visible area 9.

[0101] The visible area 8 is the user's main field of vision for observing what is ahead, and it is translucent. The non-visible area 9 surrounds the visible area 8. The diaphragm body 1 is at least partially located within the visible area 8, meaning the user can directly observe the changes in the color and transmittance of the electrochromic film from within the visible area 8. The conductive area 3 is located within the non-visible area 9, which is opaque and is also known as the "black border" of the windshield. The non-visible area 9 can shield the conductive area 3 at the edge of the diaphragm body 1, so that the conductive area 3 and the conductive components 2 located on the conductive area 3 are not exposed, resulting in a simple structure and appearance.

[0102] Understandably, the shape of the visible area 8 can be adjusted accordingly to follow the outer contour of the electrochromic device 1000; the visible area 8 can be rectangular, elliptical, or irregular in shape, etc.

[0103] refer to Figure 6 In some embodiments, the non-visible area 9 includes an installation area 11 located at the center of the top of the electrochromic device 1000. On the left and right sides of the installation area 11 are diaphragm bodies 1 for forming sunshade areas. The two diaphragm bodies 1 respectively form sunshade areas for the driver and passenger sides of the windshield. By adjusting the light transmittance of the two diaphragm bodies 1, the sunshade effect of the windshield can be adjusted to prevent glare from affecting driving. The installation area 11 is used to install the rearview mirror base and align the position of the dashcam. Alternatively, the vehicle may also install radar or integrated sensor modules (such as lane keeping assist, automatic wipers, automatic headlights, etc.) at the center of the top of the windshield, and the installation area 11 provides space for this installation.

[0104] refer to Figure 4The mounting area 11 is provided with a plurality of first lead-out electrodes 6 and a plurality of second lead-out electrodes 7 for electrical connection with each color-changing area 110 in the two diaphragm bodies 1; then the plurality of first lead-out electrodes 6 and the plurality of second lead-out electrodes 7 are covered by the mounting area 11 and are not exposed to the outside, and the electrode structure is arranged neatly and beautifully.

[0105] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electrochromic film, characterized by, include: A diaphragm body having multiple color-changing zones; the edge of the diaphragm body is provided with a conductive region, and the conductive region extends at least a portion of the edge of each color-changing zone; A conductive component is disposed in the conductive region and is used for electrical connection with the color-changing region.

2. The electrochromic louver of claim 1, wherein, The conductive region includes a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes have opposite polarities and are arranged alternately.

3. The electrochromic louver of claim 2, wherein, The membrane body comprises, along its thickness direction, 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 edges of the membrane body are alternately provided with a first groove and a second groove. The first groove penetrates the first base layer, the first conductive layer, and the electrochromic layer to expose the second conductive layer to form the first electrode. The second groove penetrates the second base layer, the second conductive layer, and the electrochromic layer to expose the first conductive layer and form the second electrode; The conductive component is electrically connected to the second conductive layer in the first groove, and the conductive component is electrically connected to the first conductive layer in the second groove.

4. The electrochromic louver of claim 3, wherein, A separator is provided between two adjacent color-changing areas, and the separator extends through the first conductive layer and the second conductive layer along the thickness direction of the film body.

5. The electrochromic louver of any of claims 2-4, wherein, The conductive component includes multiple first busbars and multiple second busbars, wherein the first busbars and the second busbars are respectively disposed on both sides of the diaphragm body in the thickness direction; wherein, Each of the color-changing areas is provided with a first bus bar on its corresponding conductive area, and the first bus bar is electrically connected to a plurality of first electrodes of the corresponding color-changing area; Each color-changing region is provided with a second bus bar on its corresponding conductive area, and the second bus bar is electrically connected to a plurality of second electrodes of its corresponding color-changing region.

6. The electrochromic louver of claim 5, wherein, Each of the color-changing areas is equipped with a first lead-out electrode and a second lead-out electrode; The first lead-out electrode is connected to the first busbar in the color-changing area, or the first lead-out electrode is connected to the first busbar through a first conductive element; The second lead electrode is connected to the second busbar in the color-changing area, or the second lead electrode is connected to the second busbar through a second conductive element.

7. The electrochromic louver of claim 6, wherein, The first busbar is integrally formed with the first conductive element, and / or, along the thickness direction of the diaphragm body, a first insulating element is provided between the first busbar and its adjacent first conductive element.

8. The electrochromic louver of claim 6, wherein, The second busbar is integrally formed with the second conductive element, and / or, along the thickness direction of the diaphragm body, a second insulating element is provided between the second busbar and its adjacent second conductive element.

9. The electrochromic louver of claim 1, wherein, The membrane body includes multiple color-changing areas arranged from top to bottom, and the conductive areas are located at the upper edge, left edge, and right edge of the membrane body; or, The membrane body includes multiple color-changing areas arranged sequentially from left to right, and the conductive area is located at the upper or lower edge of the membrane body.

10. An electrochromic device, characterized in that, Includes the electrochromic film according to any one of claims 1-9.

11. The electrochromic device of claim 10, wherein: The electrochromic device has a viewable region and a non-viewable region, the diaphragm body being at least partially located within the viewable region, the conductive region being located within the non-viewable region.

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