Electrochromic diaphragm, color changing device and terminal product

Abstract

The utility model provides an electrochromic diaphragm, a color changing device and a terminal product, and belongs to the technical field of electrochromism. The electrochromic membrane comprises an edge part, and the edge part comprises a plurality of corner parts and connecting parts for connecting every two adjacent corner parts; in the first direction, two opposite sides of the edge part are electrically connected with a first bus bar and a second bus bar respectively; a first insulating part is arranged between the conductive layer at the corner part and the first bus bar, and a second insulating part is arranged between the conductive layer at the corner part and the second bus bar; the surfaces of the first bus bar and the second bus bar of the connecting part are provided with protective layers, and the first bus bar and / or the second bus bar of the corner part are / is at least partially exposed. According to the electrochromic membrane provided by the invention, the first bus bar and the second bus bar at the corner part are at least partially exposed, so that the thickness of the corner part is reduced, and the thickness difference between the corner part and other areas of the electrochromic membrane is reduced, so that the uniformity and smoothness of the overall thickness of the electrochromic membrane are improved.

Description

Technical Field

[0001] The present application relates to the field of electrochromic technology, and in particular to an electrochromic film, a color-changing device and a terminal product. Background Art

[0002] In the prior art, a protective layer is attached to the edge of the electrochromic film to fix the bus bar on the electrochromic film to ensure the stability of the connection between the bus bar and the electrochromic film.

[0003] Since there is overlap between two adjacent protective layers in the corner area, the corner area of ​​the electrochromic film will be thicker, resulting in a large thickness difference between the corner area and other areas. Utility Model Content

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide an electrochromic film, a color-changing device and a terminal product.

[0005] In a first aspect, the present application provides an electrochromic film, comprising:

[0006] An edge portion, comprising a plurality of corner portions, and a connecting portion connecting two adjacent corner portions;

[0007] Along the first direction, two opposite sides of the edge portion are electrically connected to a first bus bar and a second bus bar respectively;

[0008] A first insulating portion is provided between the conductive layer of the corner portion and the first bus bar, and a second insulating portion is provided between the conductive layer of the corner portion and the second bus bar;

[0009] A protective layer is provided on surfaces of the first bus bar and the second bus bar of the connecting portion, and the first bus bar and / or the second bus bar of the corner portion are at least partially exposed.

[0010] In some embodiments, the first bus bar and / or the second bus bar at the corner portion are completely exposed.

[0011] In some embodiments, along the first direction, the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer stacked in sequence;

[0012] The conductive layer in the corner portion includes the first conductive layer and the second conductive layer.

[0013] In some embodiments, the first insulating portion is the first base layer of the corner portion, and the second insulating portion is the second base layer of the corner portion.

[0014] In some embodiments, the corner portion is provided with a corner groove;

[0015] The corner groove penetrates the first base layer, the first conductive layer and the electrochromic layer and exposes the second conductive layer, the first insulating portion is at least partially disposed in the corner groove, and the first insulating portion is disposed between the second conductive layer and the first bus bar;

[0016] Alternatively, the corner groove penetrates the second base layer, the second conductive layer and the electrochromic layer to expose the first conductive layer, the second insulating portion is at least partially disposed in the corner groove, and the second insulating portion is disposed between the first conductive layer and the second bus bar.

[0017] In some embodiments, along the extension direction of the connecting portion, the connecting portion is provided with a first groove and a second groove;

[0018] The first groove penetrates the first substrate layer, the first conductive layer and the electrochromic layer, and the second groove penetrates the second substrate layer, the second conductive layer and the electrochromic layer;

[0019] There is a spacer between the first groove close to the corner portion and the corner groove, and the surface of the first bus bar in the spacer is at least partially exposed; or, there is a spacer between the second groove close to the corner portion and the corner groove, and the surface of the second bus bar in the spacer is at least partially exposed.

[0020] In some embodiments, the first bus bar and the second bus bar at the corner portion are both arc-shaped, the arc includes at least one arc line, and the minimum radius of the arc line is R;

[0021] Among them, the value range of R is R≥100mm.

[0022] In some embodiments, the thickness of the corner portion is h1, and the thickness of the connecting portion is h2;

[0023] Among them, h1 and h2 satisfy the relationship h1-h2≤0.424mm.

[0024] In some embodiments, the connecting portion is in the shape of a straight edge and / or a curved edge.

[0025] In some embodiments, a barrier portion is provided on one side of the corner portion close to the central portion of the electrochromic film;

[0026] The blocking portion at least penetrates the first conductive layer and / or the second conductive layer.

[0027] In some embodiments, the blocking portion and the outer edge of the electrochromic film form a blocking area, and the corner portion is located in the blocking area.

[0028] In a second aspect, the present application provides a color-changing device, comprising a substrate layer and the electrochromic film stacked with the substrate layer.

[0029] In a third aspect, the present application provides a terminal product, comprising the electrochromic film or the color-changing device, wherein the terminal product comprises any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, an electronic product housing, glasses, a vehicle, and a display panel.

[0030] The embodiments of the present application have the following advantages: a protective layer is provided on the surfaces of the first bus bar and the second bus bar at the connecting part, so that the first bus bar and the second bus bar are connected to the connecting part through the protective layer, thereby improving the stability of the connection between the first bus bar and the second bus bar and the connecting part respectively; by at least partially exposing the first bus bar and the second bus bar at the corner part, not only the thickness of the corner part can be reduced, but also the thickness difference between the corner part and other areas of the electrochromic film is reduced, so as to improve the uniformity and flatness of the overall thickness of the electrochromic film.

[0031] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic structural diagram of an electrochromic film from one viewing angle is shown in some embodiments of the present application;

[0034] Figure 2 Shows Figure 1 Cross-sectional view of the middle AA section;

[0035] Figure 3 A structural schematic diagram showing a first embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0036] Figure 4 Shows Figure 1 A cross-sectional view of the middle BB section;

[0037] Figure 5 A structural schematic diagram showing a second embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0038] Figure 6 A structural schematic diagram showing a third embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0039] Figure 7 A structural schematic diagram showing a fourth embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0040] Figure 8 A structural schematic diagram showing a fifth embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0041] Fig. 9 A structural schematic diagram showing a sixth embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0042] Fig.10 A structural schematic diagram showing a seventh embodiment of an electrochromic film provided by some embodiments of the present application from a viewing angle;

[0043] Fig.11 A structural schematic diagram of an eighth implementation manner of an electrochromic film provided in some embodiments of the present application is shown from a viewing angle.

[0044] Description of main component symbols:

[0045] 100-electrochromic film; 110-edge portion; 120-center portion; 130-first base layer; 140-first conductive layer; 150-electrochromic layer; 160-second conductive layer; 170-second base layer; 180-spacer; 111-corner portion; 111a-corner groove; 112-connecting portion; 112a-first groove; 112b-second groove; 200-first bus bar; 300-second bus bar; 400-first insulating portion; 500-second insulating portion; 700-barrier portion; 800-protective layer. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0048] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0051] Some embodiments of the present application provide an electrochromic film 100, which can change its own transmittance in response to changes in the voltage applied at both ends, thereby changing the transmittance and color of the film; the electrochromic film 100 is mainly used in windows, such as large-area devices such as building curtain walls, car sunroofs, side windows, car windshields, and aircraft portholes, to play the role of dimming and shading.

[0052] The following is combined with Figure 1 To Attachment Fig.11 This application is described in further detail.

[0053] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, in some embodiments of the present application, the electrochromic film 100 includes an edge portion 110. In addition, it should be noted that the electrochromic film 100 also includes a center portion 120, and the edge portion 110 is adjacent to the center portion 120 to form the electrochromic film 100.

[0054] It should be noted that the central portion 120 corresponds to the visible area of ​​the electrochromic film 100, and the edge portion 110 corresponds to the non-visible area of ​​the electrochromic film 100. The area of ​​the central portion 120 is larger than the area of ​​the edge portion 110, and the central portion 120 is used to adjust the transmittance of the film or the amount of light passing through the electrochromic film 100. In addition, in some embodiments of the present application, the central portion 120 is the color-changing area in the electrochromic film 100, and the edge portion 110 is the non-color-changing area of ​​the electrochromic film 100. The area of ​​the central portion 120 is larger than the area of ​​the edge portion 110, and the central portion 120 is used to adjust the transmittance of the film or the amount of light passing through the electrochromic film 100.

[0055] The edge portion 110 includes a plurality of corner portions 111 and a connecting portion 112 connecting two adjacent corner portions 111 , that is, the corner portions 111 and the connecting portions 112 are sequentially connected end to end to form the edge portion 110 .

[0056] Exemplarily, when the electrochromic film 100 is applied to various windows, it has a plurality of edges, and the plurality of edges enclose a closed edge portion 110 of the electrochromic film 100 .

[0057] In addition, the end portion connected between two adjacent edges corresponds to the corner portion 111 of the electrochromic film 100, and the edge can be a straight edge, or an irregular shape with a small degree of curvature that can be regarded as a straight edge. Therefore, the polygonal electrochromic film 100 has multiple corner portions 111. It can be understood that in the electrochromic film 100 with a polygonal structure, the edge portion 110 includes multiple edges connected end to end in sequence, and multiple edges are connected end to end to enclose the edge portion 110. Among them, in the edge portion 110 of the electrochromic film 100, the angle formed by the connection between two adjacent edges forms the corner portion 111 of the edge portion 110, and the area within the electrochromic film 100 corresponding to the corner portion 111 corresponds to the corner area of ​​the electrochromic film 100; and the area of ​​the edge portion 110 between adjacent corner portions 111 corresponds to the connection portion 112.

[0058] Of course, in other embodiments, the shape of the electrochromic film 100 may be an irregular shape. For the irregular shape, there is a curved portion on the edge, and the curved portion corresponds to the corner portion 111 of the electrochromic film 100. In addition, it can be specified that the edge portion 110 is a corner portion 111 when the curvature is greater than a preset value, and the portion is considered to be a connecting portion 112 when the curvature is less than the preset value. It is understood that the connecting portion 112 may be a straight edge, a curved edge, or a combination of a straight edge and a curved edge.

[0059] In some embodiments, Fig.10 As shown, the connection portion 112 is provided with a plurality of grooves spaced apart from each other. At this time, the corner portion 111 refers to the edge portion 110 between the grooves at both ends of the corner of the edge portion 110 .

[0060] In some embodiments, Fig.11 As shown, the edge portion 110 is provided with a plurality of spaced grooves, and a corner groove 111 a is provided at a corner of the edge portion 110 . Here, the corner portion 111 refers to the area of ​​the edge portion 110 corresponding to the corner groove 111 a .

[0061] Along the first direction, two opposite sides of the edge portion 110 are electrically connected to the first bus bar 200 and the second bus bar 300 , respectively. It should be noted that the first direction refers to the thickness direction of the electrochromic film 100 .

[0062] It can be understood that the first bus bar 200 and the second bus bar 300 are respectively disposed on two opposite sides of the electrochromic film 100 in the thickness direction, and the first bus bar 200 and the second bus bar 300 are respectively electrically connected to the conductive layer of the edge portion 110 .

[0063] In this embodiment, there is a first insulating portion 400 between the conductive layer of the corner portion 111 and the first bus bar 200, so as to form an insulating barrier between the conductive layer of the corner portion 111 and the first bus bar 200 through the first insulating portion 400, thereby avoiding the first bus bar 200 from being connected to the conductive layer of the corner portion 111, so as to block or reduce the current from being conducted from the conductive layer of the corner portion 111 to the conductive layer corresponding to the central portion 120 of the electrochromic film 100 through the first bus bar 200.

[0064] In addition, there is a second insulating portion 500 between the conductive layer of the corner portion 111 and the second bus bar 300, so as to form an insulating barrier between the conductive layer of the corner portion 111 and the second bus bar 300 through the second insulating portion 500, thereby avoiding the second bus bar 300 from being connected to the conductive layer of the corner portion 111, so as to block or reduce the current from being conducted from the conductive layer of the corner portion 111 to the conductive layer corresponding to the central portion 120 of the electrochromic film 100 through the second bus bar 300.

[0065] Specifically, by providing the first insulating portion 400 and / or the second insulating portion 500 to reduce the current in the corner portion 111, the electric field strength in the corner portion 111 is reduced, the aging rate of the conductive layer corresponding to the corner portion 111 is reduced, and the stability and durability of the electrochromic film 100 are improved.

[0066] It should be noted that blocking the current means that the current will not be directly conducted from the corner portion 111 to the conductive layer of the central portion 120. In addition, reducing the current means that the current conducted from the bus bar through the conductive layer of the corner portion 111 to the conductive layer of the central portion 120 is smaller than the current flowing through the bus bar. It should be noted that the shape of the corner portion 111 includes at least one of a zigzag shape, a curve shape, or a simulated shape.

[0067] In this embodiment, the surfaces of the first bus bar 200 and the second bus bar 300 of the connection portion are provided with a protective layer 800, that is, the protective layer 800 covers the first bus bar 200 and the second bus bar 300 located at the connection portion, and the protective layer 800 is connected to the edge portion 110, so that the first bus bar 200 and the second bus bar 300 are connected to the edge portion 110 through the protective layer 800, thereby improving the stability of the connection between the first bus bar 200 and the second bus bar 300 and the edge portion 110. Further, since the first bus bar 200 and the second bus bar 300 are respectively electrically connected to the conductive layer of the edge portion 110, the provision of the protective layer 800 on the first bus bar 200 and the second bus bar 300 can also avoid the electrical connection between the first bus bar 200 and the second bus bar 300 and the conductive layer, which may be weakened due to environmental changes, thereby avoiding the influence on the color change speed of the electrochromic film 100. In addition, the provision of the protective layer 800 can prevent the first bus bar 200 and the second bus bar 300 from being offset at the edge portion 110 under the action of the assembly pressure during the assembly process of the electrochromic film 100, causing the first bus bar 200 and the second bus bar 300 to fall off the edge portion 110 or contact each other and cause a short circuit, thereby improving the stability of the connection between the first bus bar 200 and the second bus bar 300 and the electrochromic film 100.

[0068] The protective layer 800 may be a high temperature tape, a sealant, or other materials having a protective function, which are not listed here one by one.

[0069] In addition, the provision of the protective layer 800 can also protect the first bus bar 200 and the second bus bar 300, and prevent the first bus bar 200 and the second bus bar 300 from being connected to the external power supply and other external conductive materials at the same time, resulting in the current flowing through the conductive layer of the electrochromic film 100 being unstable or short-circuited, thereby ensuring the stability and safety of the electrochromic film 100. At the same time, the provision of the protective layer 800 can also prevent the first bus bar 200 and the second bus bar 300 from being corroded by substances in the external environment, thereby avoiding affecting the conductivity of the first bus bar 200 and the second bus bar 300, and thus avoiding affecting the color change speed of the electrochromic film 100.

[0070] In this embodiment, the first bus bar 200 and / or the second bus bar 300 of the corner portion 111 are at least partially exposed. It can be understood that the first bus bar 200 and the second bus bar 300 of the corner portion 111 are at least partially exposed. Or the first bus bar 200 or the second bus bar 300 of the corner portion 111 is at least partially exposed.

[0071] It should be noted that the surface of the first busbar 200 of the connecting portion is provided with a protective layer 800. Therefore, the partial exposure of the first busbar 200 of the corner portion 111 means that the surface of the first busbar 200 of the corner portion 111 is partially exposed to the protective layer 800; it can also be understood that the protective layer 800 provided on the surface of the first busbar 200 of the corner portion 111 is partially removed, that is, the first busbar 200 of the corner portion 111 is partially exposed. It can be understood that this not only reduces the thickness of the corner portion 111, but also reduces the thickness difference between the corner portion 111 and other areas of the electrochromic film 100, so as to improve the uniformity of the overall thickness of the electrochromic film 100, thereby ensuring the tightness of the electrochromic film 100 during the assembly process and improving the assembly quality.

[0072] Exemplarily, in this embodiment, the thickness of the protective layer 800 is defined as h. If the first bus bar 200 or the second bus bar 300 of the corner portion 111 is at least partially exposed, the thickness of the corner portion 111 is reduced by h; if the first bus bar 200 and the second bus bar 300 of the corner portion 111 are at least partially exposed, the thickness of the corner portion 111 is reduced by 2h. In other words, by not disposing the protective layer 800 on the surfaces of the first bus bar 200 and the second bus bar 300 corresponding to the corner portion 111, the thickness of the corner portion 111 is further reduced, and the thickness difference between the corner portion 111 and other areas of the electrochromic film 100 is reduced, thereby improving the uniformity of the thickness of each area of ​​the electrochromic film 100.

[0073] More specifically, since an insulating portion is additionally provided between the conductive layer of the corner portion 111 and the busbar, if the surface of the busbar of the corner portion 111 is also completely covered with the protective layer 800, the corner portion 111 is likely to have a thickness difference compared to other areas of the electrochromic film, that is, it is thicker. This thickness difference may cause stress concentration in the corner portion during the assembly process, thereby increasing the risk of glass cracking at this location. Therefore, by at least partially exposing the first busbar 200 and / or the second busbar 300 of the corner portion 111, the thickness of the corner portion can be reduced without affecting the electrical connection stability of the electrochromic film, and the thickness difference between the corner portion and other areas of the electrochromic film can be reduced, thereby improving the uniformity of the thickness of each area of ​​the electrochromic film and reducing the risk of glass cracking at the corner during the assembly process.

[0074] It can be understood that the first bus bar 200 and / or the second bus bar 300 of the corner portion 111 are at least partially exposed, which will not affect the electrical connection stability of the electrochromic film. This is because an insulating portion is provided between the conductive layer of the corner portion 111 and the bus bar, and the bus bar there itself does not serve as an electrical connection. Therefore, even if there is no protective layer 800 covering the bus bar, resulting in a weakened connection stability between the bus bar there and the corner portion 111, it will not affect the electrical connection stability of the electrochromic film.

[0075] It should be noted that the busbars (including the first busbar 200 and the second busbar 300) can be made of conductive materials well known to those skilled in the art, for example, at least one of conductive silver paste, conductive copper paste, conductive carbon paste, nanosilver conductive ink, copper foil, copper wire or conductive adhesive film.

[0076] In some embodiments of the present application, the first bus bar 200 and / or the second bus bar 300 of the corner portion 111 are completely exposed. It is understandable that the first bus bar 200 or the second bus bar 300 of the corner portion 111 is completely exposed. Or the first bus bar 200 and the second bus bar 300 of the corner portion 111 are completely exposed. It should be noted that by completely exposing the first bus bar 200 and the second bus bar 300 of the corner portion 111 to further reduce the thickness of the corner portion, thereby reducing the thickness difference between the corner portion 111 and other areas of the electrochromic film, thereby improving the stability and assembly quality of the electrochromic film during the assembly process.

[0077] It should be noted that the first bus bar 200 and / or the second bus bar 300 of the corner portion 111 are completely exposed, which also includes the following situations: the protective layer 800 adjacent to the two ends of the corner portion 111 partially overlaps the surface of the first bus bar 200 or the second bus bar 300 of the corner portion 111, or the protective layer 800 adjacent to the two ends of the corner portion 111 partially overlaps the surface of the first bus bar 200 and the second bus bar 300 of the corner portion 111. At this time, due to the small overlap length, it can be approximated that the first bus bar 200 and / or the second bus bar 300 of the corner portion 111 are completely exposed. Specifically, the overlap length can be less than or equal to 5% of the length of the first bus bar 200 and / or the second bus bar 300 of the corner portion, such as 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, etc., preferably less than or equal to 2% of the length of the first bus bar 200 and / or the second bus bar 300 of the corner portion. It can be understood that since the overlapping length is relatively small, it will not have a significant impact on the overall thickness of the corner portion 111 .

[0078] like Figures 2 to 9 As shown, in some embodiments of the present application, along the first direction, the electrochromic film 100 includes a first substrate layer 130 , a first conductive layer 140 , an electrochromic layer 150 , a second conductive layer 160 , and a second substrate layer 170 stacked in sequence.

[0079] The first substrate layer 130 and the second substrate layer 170 are both transparent substrates, and the "transparent substrate" is an optical grade transparent material, specifically a flexible substrate material, and the flexible substrate material is polyethylene glycol terephthalate (PET), polycarbonate (PC), polyimide (PI), cycloolefin copolymer or triacetyl cellulose, etc. The first substrate layer 130 and the second substrate layer 170 can also be set as glass substrates.

[0080] In addition, the first conductive layer 140 and the second conductive layer 160 are both transparent conductive layers, and the material of the "transparent conductive layer" can be a 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 grids or silver nanoparticles. In this embodiment, ITO is attached to the first substrate layer 130 and the second substrate layer 170 by magnetron sputtering. The electrochromic layer 150 includes an electrochromic material layer, an electrolyte layer and an ion conductive layer stacked in sequence. The materials of each layer in the electrochromic layer can be materials that have been disclosed in the prior art, which will not be described in detail here. In other embodiments, the electrochromic layer 150 can also be a liquid crystal dimming layer, etc. By connecting the first conductive layer 140 and the second conductive layer 160 to an external power source at the same time, an electric field can be formed between the first conductive layer 140 and the second conductive layer 160, so that the electrochromic layer 150 undergoes a stable and reversible color change under the action of the electric field.

[0081] It should be noted that, in this embodiment, the conductive layer in the corner portion 111 refers to the first conductive layer 140 and the second conductive layer 160 located in the corner portion 111 .

[0082] It can be understood that when a corner portion 111 is provided with a corner groove 111a, a corner portion 111 only includes one conductive layer, that is, the conductive layer of a corner portion 111 is one of the first conductive layer 140 and the second conductive layer 160. However, since the electrochromic film includes multiple corner portions 111, the conductive layers of different corner portions 111 may be different. In this case, it can also be considered that the conductive layer of the corner portion 111 includes the first conductive layer 140 and the second conductive layer 160.

[0083] like Figures 7 to 9 As shown, in some embodiments of the present application, the first insulating portion 400 is the first base layer 130 of the corner portion 111 , and the second insulating portion 500 is the second base layer 170 of the corner portion 111 .

[0084] It can be understood that in this embodiment, along the thickness direction of the electrochromic film 100, the corner portion 111 includes a first substrate layer 130, a first conductive layer 140, an electrochromic layer 150, a second conductive layer 160 and a second substrate layer 170 stacked in sequence, the first bus bar 200 is arranged on the side of the first substrate layer 130 away from the second substrate layer 170, and the second bus bar 300 is arranged on the side of the second substrate layer 170 away from the first substrate layer 130.

[0085] By setting the first base layer 130 as the first insulating portion 400, it is avoided to add an insulating structure between the first bus bar 200 and the conductive layer, thereby avoiding electrode cutting at the corner. Similarly, by setting the second base layer 170 as the second insulating portion 500, it is avoided to add an insulating structure between the second bus bar 300 and the conductive layer, thereby avoiding electrode cutting at the corner.

[0086] like Figures 4 to 6 As shown, in some embodiments of the present application, the corner portion 111 is provided with a corner groove 111 a.

[0087] In some embodiments, the corner groove 111a penetrates the first base layer 130, the first conductive layer 140 and the electrochromic layer 150, and exposes the second conductive layer 160, the first insulating portion 400 is at least partially disposed in the corner groove 111a, and the first insulating portion 400 is disposed between the second conductive layer 160 and the first bus bar 200.

[0088] It should be noted that the first insulating part 400 is at least partially disposed in the corner groove 111a and includes at least the following configurations: (1) the first insulating part 400 is completely disposed in the corner groove 111a to form an insulating barrier between the second conductive layer 160 and the first bus bar 200 through the first insulating part 400, so as to avoid electrical connection between the first bus bar 200 and the second conductive layer 160 of the corner part 111, so as to avoid corner failure. (2) A portion of the first insulating portion 400 is disposed in the corner groove 111a, and another portion of the first insulating portion 400 is overlapped on the connecting portion 112 and / or the central portion 120 adjacent to the corner groove 111a. This not only avoids corner failure, but also ensures process stability. It also prevents the first insulating portion 400 from being entirely disposed in the corner groove 111a. If the first insulating portion 400 is not properly attached and partially warps or skews, the first bus bar 200 and the second conductive layer 160 are in contact. This ensures the stability of the connection between the first insulating portion 400 and the corner groove 111a, and ensures the stability of the relative positions of the first bus bar 200 and the second conductive layer 160 in the corner portion 111.

[0089] It can be understood that, in this embodiment, the corner portion 111 includes a second conductive layer 160 and a second base layer 170 stacked in sequence.

[0090] It should be noted that, in the projection of the plane where the second conductive layer 160 is located, the first insulating portion 400 at least completely covers the first bus bar 200 corresponding to the corner groove 111a, so as to prevent the first bus bar 200 from being electrically connected to the second conductive layer 160 exposed in the corner groove 111a. Specifically, the first insulating portion 400 separates the first bus bar 200 from the second conductive layer 160 corresponding to the corner portion 111, so as to prevent the first bus bar 200 from directly contacting the second conductive layer 160 corresponding to the corner portion 111, so as to form a blocking or reducing effect on the current flowing through the first bus bar 200 during the conduction to the corner portion 111 through the first insulating portion 400, thereby reducing the magnitude of the current conducted to the corner portion 111, and reducing the electric field strength of the first conductive layer 140 and the second conductive layer 160 corresponding to the corner portion 111.

[0091] It can be understood that at this time, the thickness of the corner portion 111 is the sum of the thicknesses of the first bus bar 200, the first insulating portion 400, the second conductive layer 160, the second base layer 170 and the second bus bar 300. Compared with the embodiment in which the first insulating portion 400 is the first base layer 130 of the corner portion 111, this embodiment can reduce the thickness of the corner portion 111 by opening a corner groove 111a, thereby reducing the thickness difference between the corner portion 111 and other areas of the electrochromic film 100.

[0092] In other embodiments, the corner groove 111a penetrates the second base layer 170, the second conductive layer 160 and the electrochromic layer 150 to expose the first conductive layer 140, and the second insulating portion 500 is disposed in the corner groove 111a, and the second insulating portion 500 is disposed between the first conductive layer 140 and the second bus bar 300.

[0093] It should be noted that the second insulating part 500 is at least partially disposed in the corner groove 111a and includes at least the following configurations: (1) the second insulating part 500 is completely disposed in the corner groove 111a, so as to form an insulating barrier between the first conductive layer 140 and the second bus bar 300 through the second insulating part 500, so as to avoid electrical connection between the second bus bar 300 and the first conductive layer 140 of the corner part 111, so as to avoid corner failure. (2) A portion of the second insulating portion 500 is disposed in the corner groove 111a, and another portion of the second insulating portion 500 is overlapped on the connecting portion 112 and / or the central portion 120 adjacent to the corner groove 111a. This not only avoids corner failure, but also ensures process stability. It also prevents the second insulating portion 500 from being in contact with the first conductive layer 140 when the second insulating portion 500 is not properly attached and partially warps or skews, thereby ensuring the stability of the connection between the second insulating portion 500 and the corner groove 111a, and ensuring the stability of the relative positions of the second bus bar 300 and the first conductive layer 140 in the corner portion 111.

[0094] It can be understood that, in this embodiment, the corner portion 111 includes the first conductive layer 140 and the first base layer 130 stacked in sequence. At this time, the thickness of the corner portion 111 is the sum of the thicknesses of the first bus bar 200, the second insulating portion 500, the first conductive layer 140, the first base layer 130 and the second bus bar 300.

[0095] In the groove structure, the first insulating part 400 and the second insulating part 500 can both be insulating glue, preferably insulating tape, more preferably, insulating high-temperature tape, and other materials with higher resistance are also acceptable, which are not listed here one by one.

[0096] It should be noted that the role and beneficial effect of the second insulating portion 500 in the corner groove 111 a are the same as the role and beneficial effect of the first insulating portion 400 in the corner groove 111 a , and are not described in detail herein.

[0097] It can be understood that the structures of the corner grooves 111a of the multiple corner portions 111 of the electrochromic film may be inconsistent. For example, some corner portions 111 include a second conductive layer 160 and a second base layer 170 stacked in sequence, and some corner portions 111 include a first conductive layer 140 and a first base layer 130 stacked in sequence. Of course, the structures of the corner grooves 111a of the multiple corner portions 111 of the electrochromic film may all be consistent.

[0098] like Figure 2 and Figure 3As shown, in some embodiments of the present application, along the extension direction of the connecting portion 112 , the connecting portion 112 is provided with a first groove 112 a and a second groove 112 b .

[0099] The number of the first grooves 112a and the number of the second grooves 112b can be one or more, and can be specifically set according to actual conditions.

[0100] Specifically, the first groove 112a and the second groove 112b are arranged alternately. It is understandable that along the extension direction of the connecting portion 112, the first groove 112a and the second groove 112b provided in the connecting portion 112 may also be arranged non-alternatingly, for example, a plurality of first grooves 112a may be arranged continuously, and then a plurality of second grooves 112b may be arranged, etc. The specific arrangement method may be adaptively selected according to the requirements of the color change effect of the product.

[0101] More specifically, the first groove 112 a penetrates the first substrate layer 130 , the first conductive layer 140 and the electrochromic layer 150 , and the second groove 112 b penetrates the second substrate layer 170 , the second conductive layer 160 and the electrochromic layer 150 .

[0102] It should be noted that there is a spacer 180 between the first groove 112a and the corner groove 111a close to the corner portion 111, and the spacer 180 includes a first bus bar 200, a first substrate layer 130, a first conductive layer 140, an electrochromic layer 150, a second conductive layer 160 and a second substrate layer 170 stacked in sequence. Therefore, if the bus bar surface of the spacer is also completely covered with a protective layer 800, then in terms of thickness, the spacer is also prone to thickness difference compared to the first groove 112a and the corner groove 111a on both sides of the spacer, and other areas of the electrochromic film, that is, thicker, and the thickness difference may cause stress concentration in the corner during the lamination process, thereby increasing the risk of glass cracking at this location. Based on this, in order to reduce the thickness difference between the spacer 180 and other areas in the electrochromic film 100, the protective layer 800 corresponding to the spacer 180 is removed. Specifically, the surface of the first bus bar 200 of the spacer 180 is partially exposed. By removing the protective layer 800 of the spacer 180 , the overall thickness of the spacer 180 is reduced, thereby reducing the thickness difference between the spacer 180 and other regions in the electrochromic film 100 .

[0103] In addition, in some embodiments, a spacer 180 is provided between the second groove 112b close to the corner portion 111 and the corner groove 111a, and a surface portion of the second bus bar 300 is exposed at the spacer 180. In this embodiment, the structure of the spacer 180 is the same as the spacer 180 between the first groove 112a close to the corner portion 111 and the corner groove 111a, and will not be described in detail here.

[0104] Furthermore, the overall thickness of the spacer 180 can be further reduced by removing the first insulating portion 400 or the second insulating portion 500 on the surface of the spacer 180. That is, the first insulating portion 400 or the second insulating portion 500 is entirely disposed in the corner groove 111a. Since a bus bar is disposed on one side of each connecting portion 112 in the edge portion 110 of the electrochromic film 100, two adjacent bus bars on one side of the connecting portion 112 form an overlap at the corner 111, that is, at the corner of the corner 111, the two bus bars are connected and overlapped, resulting in an increase in the thickness of the corner 111, resulting in a large difference in thickness between the corner of the corner 111 and other areas of the electrochromic film 100, affecting the assembly quality of the electrochromic film 100.

[0105] Based on this, Figure 1 As shown, in some embodiments of the present application, the first bus bar 200 and the second bus bar 300 of the corner portion 111 are both arc-shaped, and the arc includes at least one arc line, and the minimum radius of the arc line is R, wherein the value range of R is R≥100mm.

[0106] It should be noted that when the busbar at the corner 111 is a non-arc structure, such as a right-angle structure, the busbar at the corner is difficult to be formed as a whole because wrinkles may occur and even the busbar may break, thus affecting the electrical connection. Therefore, the connection can only be achieved by overlapping two busbars, i.e., by lap joint.

[0107] By setting the first bus bar 200 of the corner portion 111 to be arc-shaped, so as to set the first bus bar 200 of the corner portion 111 to be an integral arc-shaped structure, that is, the first bus bar 200 of the corner portion 111 is integrally formed, and the wrinkles formed by the bending of the first bus bar 200 can be offset by the ductility of the first bus bar 200 itself, which can effectively avoid the overlap of two first bus bars 200 in the corner portion 111, which is equivalent to reducing the thickness of the corner portion 111 by one first bus bar 200, thereby reducing the thickness of the corner portion 111.

[0108] In addition, by setting the second bus bar 300 of the corner portion 111 to an arc shape, it is convenient to set the second bus bar 300 of the corner portion 111 to an integral arc structure, that is, to achieve the one-piece molding of the second bus bar 300 of the corner portion 111. At this time, the wrinkles formed by the bending of the second bus bar 300 can be offset by the ductility of the second bus bar 300 itself, which can effectively avoid the overlap of two second bus bars 300 in the corner portion 111, which is equivalent to reducing the thickness of one second bus bar 300 in the corner portion 111, thereby reducing the thickness of the corner portion 111.

[0109] It can be understood that by setting the first bus bar 200 and the second bus bar 300 of the corner portion 111 to be arc-shaped, not only the thickness of the corner portion 111 can be further reduced, but also the thickness difference between the corner portion 111 and other areas of the electrochromic film 100 can be reduced. While ensuring the uniformity of the thickness of the corner portion 111, the uniformity of the thickness of each area of ​​the electrochromic film 100 is improved, thereby effectively improving the quality of the assembly.

[0110] It should be noted that when the radius of each arc segment constituting the arc is smaller, the ductility requirement of the busbar itself is higher. Therefore, in some embodiments of the present application, the arc includes at least one arc line, and when the minimum radius of the arc line is R, the value range of R is R ≥ 100mm. For example, R can be 100mm, 110mm, 120mm, 140mm, 160mm, 180mm, 200mm, etc., which can be set according to actual conditions.

[0111] In addition, it should be noted that the central angle corresponding to the corner portion 111 and the central angles corresponding to the first bus bar 200 and the second bus bar 300 of the corner portion 111 are all α, wherein the value range of α is 45°≤α≤135°, so as to ensure that the arc corresponding to the first bus bar 200 and the second bus bar 300 of the corner portion 111 is equal to the arc of the corner portion 111, ensure the stability of the connection between the first bus bar 200 and the second bus bar 300 and the corner portion 111 respectively, and improve the compactness and aesthetics of the edge portion 110 of the electrochromic film 100.

[0112] It can be understood that if a corner groove 111a is opened in the corner portion 111, the first insulating portion 400 and the second insulating portion 500 are both arc-shaped to ensure the insulation barrier quality of the first insulating portion 400 between the first bus bar 200 and the second conductive layer 160, and the insulation barrier quality of the second insulating portion 500 between the second bus bar 300 and the first conductive layer 140.

[0113] Based on any of the above embodiments, in some embodiments of the present application, the thickness of the corner portion 111 is h1, and the thickness of the connecting portion 112 is h2, wherein h1 and h2 satisfy the relationship h1-h2≤0.424 mm.

[0114] It should be noted that h1-h2≤0.424mm here means that the difference between the maximum thickness corresponding to the corner portion 111 and the minimum thickness corresponding to the connecting portion 112 is less than or equal to 0.424mm, for example, it can be 0.424mm, 0.413mm, 0.401mm, 0.396mm, 0.385mm, 0.379mm, 0.375mm, 0.367mm, etc. It is understandable that the difference between the thickness of the corner portion 111 and other areas of the electrochromic film 100 is less than 0.424mm, so as to reduce the difference in thickness of each area of ​​the electrochromic film 100, improve the flatness of the electrochromic film 100, and reduce the risk of glass cracking at the corner during the assembly process.

[0115] like Figure 1 As shown, in some embodiments of the present application, the shape of the connecting portion 112 is a straight edge and / or a curved edge.

[0116] It can be understood that the shape of the connection portion 112 can be a straight edge or a curved edge; in addition, the shape of the connection portion 112 can also be a combination of a straight edge and a curved edge, which can be specifically set according to actual conditions.

[0117] like Figures 4 to 6 As shown, in some embodiments of the present application, a blocking portion 700 is provided on one side of the corner portion 111 close to the central portion 120 of the electrochromic film 100 to block or reduce the conduction of current from the conductive layer of the blocking portion 700 to the conductive layer of the central portion 120 of the electrochromic film 100. Specifically, the blocking portion 700 at least penetrates the first conductive layer 140 and / or the second conductive layer 160. In some embodiments, the blocking portion 700 at least penetrates the first conductive layer 140 or the second conductive layer 160. In some embodiments, the blocking portion 700 at least penetrates the first conductive layer 140 and the second conductive layer 160.

[0118] Preferably, the barrier portion 700 penetrates the first conductive layer 140, the electrochromic layer 150 and the second conductive layer 160, and the barrier portion 700 also penetrates the first substrate layer 130 or the second substrate layer 170. It can be understood that the barrier portion 700 penetrates the first substrate layer 130, the first conductive layer 140, the electrochromic layer 150 and the second conductive layer 160; or, the barrier portion 700 penetrates the second substrate layer 170, the first conductive layer 140, the electrochromic layer 150 and the second conductive layer 160.

[0119] It should be noted that when the corner electrode is cut, the first conductive layer 140 and the second conductive layer 160 at the cut may contact each other, thereby causing a short circuit in the electrochromic film. By providing a blocking portion 700 that penetrates the first conductive layer 140 and / or the second conductive layer 160, the short circuit can be controlled to be limited to a small conductive layer area between the blocking portion 700 and the corner electrode 111, thereby avoiding a short circuit between the first conductive layer 140 and the second conductive layer 160 of the entire electrochromic film.

[0120] In addition, by providing the blocking portion 700, the current in the corner 111 can be reduced, thereby reducing the electric field strength in the corner 111, reducing the aging rate of the conductive layer in the corner 111, and also reducing the possibility of overcharging or over-discharging of the electrochromic layer 150 in the corner 111, thereby achieving a balanced electric field strength in the edge portion 110, avoiding aging failure in corners or parts of the entire electrochromic film 100, and improving the stability and durability of the electrochromic film 100.

[0121] When the electrochromic film 100 is electrically connected to an external power source, the blocking portion 700 blocks or reduces the current conducted from the corner portion 111 to the central portion 120 of the electrochromic film 100. Therefore, the current in the area corresponding to the corner portion 111 is lower than the current in other areas of the electrochromic film 100, so that the electrochromic layer 150 corresponding to the corner portion 111 will not be overcharged or over-discharged, reducing the possibility of failure, thereby improving the performance and service life of the electrochromic film 100.

[0122] In some embodiments of the present application, the barrier portion 700 forms a barrier area with the outer edge of the electrochromic film 100, and the corner portion 111 is located in the barrier area, so that the corner portion 111 is enclosed by the barrier area, so that the current conducted by the corner portion 111 is limited to the barrier area, thereby reducing the influence of the field strength on the corner portion 111 and causing failure.

[0123] It is understandable that when cutting, the electrode of the connecting portion 112 may encounter the problem that the first conductive layer 140 and the second conductive layer 160 at the cutting position contact each other, thereby causing a short circuit in the electrochromic film. Therefore, the electrode of the connecting portion 112 may also be provided with a blocking portion 700.

[0124] Specifically, the barrier portion is provided in the first groove 112a of the connecting portion 112, including the following provision methods: (1) along the extension direction of the connecting portion 112, the barrier portion is provided on the opposite side walls of the first groove 112a, so as to form a barrier effect between the first conductive layer 140 and the first bus bar 200 adjacent to the two opposite sides of the first groove 112a through the barrier portion 700, so as to avoid the first bus bar 200 from contacting the first conductive layer 140, and at the same time, it can also avoid the first conductive layer 140 exposed from the two opposite sides of the first groove 112a from contacting the second conductive layer 160 exposed in the first groove 112a, thereby avoiding a short circuit. (2) A plurality of partitions are provided along the extension direction of the connection portion, and two adjacent partitions are located at the two ends of the first groove 112a, so that the first conductive layer 140 corresponding to the two ends of the first groove 112a is isolated by the partitions, so that the blocking portion 700 is formed at the two ends of the second conductive layer 160 exposed in the first groove 112a, so as to avoid the first conductive layer 140 and the second conductive layer 160 from contacting and short-circuiting. (3) Partitions are provided at intervals on the periphery of the first groove 112a, and the partitions surround the first groove 112a, so as to form a blocking portion 700 between the first groove 112a and the partitions, and a portion of the first conductive layer 140 adjacent to the first groove 112a is isolated from the first conductive layer 140 in the electrochromic layer by the blocking portions to form an insulating connection, and the blocking portion 700 can form an insulating barrier between the first conductive layer 140 and the second conductive layer 160.

[0125] The partition portion passes through the first conductive layer 140 ; ​​or the partition portion passes through the first conductive layer 140 and the first base layer 130 ; or the partition portion passes through the first base layer 130 , the first conductive layer 140 and the electrochromic layer 150 ; or the partition portion passes through the first conductive layer 140 and the electrochromic layer 150 .

[0126] In addition, the barrier portion 700 is provided in the second groove 112b of the connecting portion 112, including the following provision methods: (1) along the extension direction of the connecting portion 112, the barrier portion 700 is provided on the opposite side walls of the second groove 112b, so that a barrier effect is formed between the second conductive layer 160 and the second bus bar 300 adjacent to the two opposite sides of the second groove 112b through the barrier portion 700, so as to avoid the second bus bar 300 from contacting the second conductive layer 160, and at the same time, it can also avoid the second conductive layer 160 exposed from the two opposite sides of the second groove 112b from contacting the first conductive layer 140 exposed in the second groove 112b, thereby avoiding a short circuit. (2) A plurality of partitions are provided along the extension direction of the connection portion, and two adjacent partitions are located at the two ends of the second groove 112b, so that the second conductive layer 160 corresponding to the two ends of the second groove 112b is isolated by the partitions, so that the blocking portion is formed at the two ends of the first conductive layer 140 exposed in the second groove 112b, so as to avoid the first conductive layer 140 and the second conductive layer 160 from contacting and short-circuiting. (3) Partitions are provided at intervals on the outer periphery of the second groove 112b, and the partitions surround the second groove 112b, so as to form a blocking portion between the second groove 112b and the partitions, and a portion of the second conductive layer 160 adjacent to the second groove 112b is isolated from the second conductive layer 160 in the electrochromic layer 150 by the blocking portions to form an insulated connection, and the blocking portion 700 can form an insulating barrier between the first conductive layer 140 and the second conductive layer 160.

[0127] The partition portion penetrates the second conductive layer 160 ; or the partition portion penetrates the second conductive layer 160 and the second base layer 170 ; or the partition portion penetrates the second base layer 170 , the second conductive layer 160 and the electrochromic layer 150 ; or the partition portion penetrates the second conductive layer 160 and the electrochromic layer 150 .

[0128] Some embodiments of the present application further provide a color-changing device, including a substrate layer and an electrochromic film 100 as described in any of the above embodiments and stacked with the substrate layer.

[0129] Specifically, the substrate layer is a transparent structure, for example, the substrate layer can be transparent glass, a transparent acrylic plate or a transparent PVC plate, etc. Preferably, the substrate layer is glass, and the substrate layer is provided with two layers, and the electrochromic film 100 can be sandwiched between the two substrate layers, and an adhesive is provided between the electrochromic film 100 and the substrate layer. Among them, the adhesive can be polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), OCA (Optically Clear Adhesive) optical adhesive, SCA optical adhesive, ionic intermediate film (Surper Safe Glas, SGP), liquid optical adhesive LOCA (Liquid Optical Clear Adhesive) or at least one of acrylic.

[0130] The edge of the electrochromic film 100 is sealed by a sealant at the outer peripheral edge of the electrochromic film 100, and the two substrate layers are connected by the sealant to form a sealed color-changing device. The sealant is a transparent insulating colloid, and the material of the sealant includes a conventional adhesive in the art that has an insulating and water-oxygen-isolating effect, such as a pressure-sensitive adhesive, a hot melt adhesive, a UV light-curing adhesive, a heat-curing adhesive, or a UV-heating dual-curing adhesive.

[0131] In addition, the sealant can not only form adhesion between the two substrate layers and the electrochromic film 100, but also seal the electrochromic film 100 to isolate oxygen and air, thereby preventing the electrochromic film 100 from contacting external moisture and oxygen, thereby increasing the service life of the electrochromic film 100 and the service life of the color-changing device.

[0132] In addition, a shielding layer is provided on the surface of the substrate layer corresponding to the edge portion 110 of the electrochromic film 100. The shielding layer can be provided on the inner surface or the outer surface of the substrate layer; the shielding layer can be made of shielding materials such as metal and black ink. In order to prevent users from directly seeing the edge portion 110 of the electrochromic film 100 through the transparent substrate layer, the appearance of the entire film is made more beautiful. Therefore, a shielding layer is provided at the edge of the substrate layer, and the bus bar and the barrier portion 700 at the edge of the electrochromic film 100 are shielded by the shielding layer, thereby improving the aesthetics of the color-changing device. In addition, the width of the shielding layer is greater than the width of the edge portion 110. Generally speaking, the width of the shielding layer extends from the outer edge of the film to the center area to exceed the edge portion 110 of the film.

[0133] The present application also provides a terminal product, including the electrochromic film or the color changing device as described in any of the above embodiments, wherein the terminal product includes any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, a housing of an electronic product, glasses, a vehicle, and a display panel. In this embodiment, since the above electrochromic film 100 or the color changing device is used, it has all the advantages of the above electrochromic film 100 and the color changing device, which will not be repeated here.

[0134] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0135] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0136] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. An electrochromic film, characterized in that: include: An edge portion, comprising a plurality of corner portions, and a connecting portion connecting two adjacent corner portions; Along the first direction, two opposite sides of the edge portion are electrically connected to a first bus bar and a second bus bar respectively; A first insulating portion is provided between the conductive layer of the corner portion and the first bus bar, and a second insulating portion is provided between the conductive layer of the corner portion and the second bus bar; A protective layer is provided on surfaces of the first bus bar and the second bus bar of the connecting portion, and the first bus bar and / or the second bus bar of the corner portion are at least partially exposed.

2. The electrochromic film according to claim 1, characterized in that: The first bus bar and / or the second bus bar at the corner portion are completely exposed.

3. The electrochromic film according to claim 1, characterized in that: Along the first direction, the electrochromic film comprises a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer stacked in sequence; The conductive layer in the corner portion includes the first conductive layer and the second conductive layer.

4. The electrochromic film according to claim 3, characterized in that: The first insulating portion is the first base layer of the corner portion, and the second insulating portion is the second base layer of the corner portion.

5. The electrochromic film according to claim 3, characterized in that: The corner portion is provided with a corner groove; The corner groove penetrates the first substrate layer, the first conductive layer and the electrochromic layer and exposes the second conductive layer, the first insulating portion is at least partially disposed in the corner groove, and the first insulating portion is disposed between the second conductive layer and the first bus bar; Alternatively, the corner groove penetrates the second base layer, the second conductive layer and the electrochromic layer to expose the first conductive layer, the second insulating portion is at least partially disposed in the corner groove, and the second insulating portion is disposed between the first conductive layer and the second bus bar.

6. The electrochromic film according to claim 5, characterized in that: Along the extension direction of the connecting portion, the connecting portion is provided with a first groove and a second groove; The first groove penetrates the first substrate layer, the first conductive layer and the electrochromic layer, and the second groove penetrates the second substrate layer, the second conductive layer and the electrochromic layer; There is a spacer between the first groove close to the corner portion and the corner groove, and the surface of the first bus bar in the spacer is at least partially exposed; or, there is a spacer between the second groove close to the corner portion and the corner groove, and the surface of the second bus bar in the spacer is at least partially exposed.

7. The electrochromic film according to claim 1, characterized in that: The first bus bar and the second bus bar of the corner portion are both arc-shaped, the arc includes at least one arc line, and the minimum radius of the arc line is R; Among them, the value range of R is R≥100mm.

8. The electrochromic film according to any one of claims 3 to 7, characterized in that: The thickness of the corner portion is h1, and the thickness of the connecting portion is h2; Among them, h1 and h2 satisfy the relationship h1-h2≤0.424mm.

9. The electrochromic film according to claim 1, characterized in that: The connection portion is in the shape of a straight edge and / or a curved edge.

10. The electrochromic film according to claim 3, characterized in that: A barrier portion is provided on one side of the corner portion close to the central portion of the electrochromic film; The blocking portion at least penetrates the first conductive layer and / or the second conductive layer.

11. The electrochromic film according to claim 10, characterized in that: The blocking portion and the outer edge of the electrochromic film form a blocking area, and the corner portion is located in the blocking area.

12. A color changing device, characterized in that: The invention comprises a substrate layer and the electrochromic film according to any one of claims 1 to 11 which is stacked with the substrate layer.

13. A terminal product, characterized in that: It comprises the electrochromic film as described in any one of claims 1 to 11 or the color-changing device as described in claim 12, wherein the terminal product comprises any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, a housing of an electronic product, glasses, a vehicle, and a display panel.

Images