Electrochromic diaphragm, color changing device and terminal product

Abstract

The invention 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; the edge part comprises a corner part and a straight edge part, the corner part is correspondingly provided with a corner electrode, the straight edge part is provided with a straight edge electrode, and the straight edge electrode and the corner electrode are arranged at intervals; the electrochromic membrane at least comprises one of the following characteristics: the length of the corner electrode is L1, the average length of the straight edge electrode is L2, and L2 is less than L1; the corner electrode comprises a first edge extending along the first direction and a second edge extending along the second direction, and the value range of an included angle alpha between the first edge and the second edge is 45 degrees < = alpha < = 135 degrees; the perimeter of the edge part is D, the corner electrode is arc-shaped, the radius of the corner electrode is N, and the value range of N is 1 / 9 * D < = N. Accelerated aging of corners is effectively avoided, and balance of electric field intensity of the edge part of the diaphragm is achieved.

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] Electrochromism is a technology that allows electrochromic materials to reversibly and stably color or fade under the action of external voltage. Usually, bus bars are provided on the two conductive substrate layers of the electrochromic film, and the electrochromic film is electrically connected to an external power source through the bus bars, thereby forming a voltage difference at both ends of the electrochromic material, so that the electrochromic material of the electrochromic film changes color in response to the change in the voltage difference at both ends.

[0003] At present, during the use of electrochromic films, the corner areas of the films are prone to premature failure, which eventually causes the entire film to fail quickly. Summary of the invention

[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] The present application provides the following technical solutions: an electrochromic film, comprising an edge portion;

[0006] The edge portion includes a corner portion and a straight edge portion, the corner portion is correspondingly provided with a corner electrode, the straight edge portion is provided with a straight edge electrode, and the straight edge electrode is spaced apart from the corner electrode;

[0007] The electrochromic film also includes at least one of the following features:

[0008] The length of the corner electrode is L 1 , the average length of the straight-edge electrode is L 2 , L 2 <L 1 ;

[0009] The corner electrode comprises a first side extending along a first direction and a second side extending along a second direction, and a value range of an angle α between the first side and the second side is: 45°≤α≤135°;

[0010] The perimeter of the edge portion is D, the corner electrode is arc-shaped, and the radius of the corner electrode is N, wherein the value range of N is 1 / 9×D≤N.

[0011] Furthermore, the L 1 and the L 2 Between: L 2 <L 1 <4×L 2 .

[0012] Furthermore, the L 1 and the L 2 The difference is greater than 20% L 2 .

[0013] Furthermore, the straight-line distance between the two ends of the corner electrode is L, wherein L and L 2 Between: L 2 <L.

[0014] Furthermore, a first spacing region is provided between the corner electrode and the adjacent straight-edge electrode, and the length of the first spacing region is L 3 ;

[0015] A second spacing region is provided between adjacent straight-edge electrodes, and the length of the second spacing region is L 4 ;

[0016] Among them, L 4 ≤L 3 .

[0017] Furthermore, the corner electrode is arranged to protrude toward the corner portion.

[0018] Further, 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; a first groove and a second groove are provided at an edge portion of the electrochromic film; the electrochromic film is electrically connected to a bus bar, the bus bar comprises a first bus bar and a second bus bar, the corner electrode comprises a first corner electrode and a second corner electrode, and the straight-edge electrode comprises a first straight-edge electrode and a second straight-edge electrode;

[0019] The first groove penetrates the first substrate layer, the first conductive layer and the electrochromic layer along the thickness direction of the electrochromic film to expose a portion of the second conductive layer to form the first corner electrode and the first straight-edge electrode, and the first corner electrode and the first straight-edge electrode are electrically connected to the first bus bar;

[0020] The second groove penetrates the second substrate layer, the second conductive layer and the electrochromic layer along the thickness direction of the electrochromic film to expose a portion of the first conductive layer to form the second corner electrode and the second straight-edge electrode, and the second corner electrode and the second straight-edge electrode are electrically connected to the second bus bar.

[0021] Furthermore, the value range of α is 90°≤α≤135°.

[0022] Furthermore, a blocking portion is provided corresponding to the corner electrode, and the blocking portion blocks or reduces the current of the bus bar from being conducted from the corner electrode to the central portion of the electrochromic film.

[0023] Furthermore, the barrier portion includes an etched area after etching a portion of the conductive layer and / or a filler having a resistance greater than that of the bus bar.

[0024] Furthermore, the vertical distance from any point on the edge portion corresponding to two points of the first preset distance to the line segment formed by the two points is a second preset distance, and when the second preset distance is less than or equal to n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is a straight edge portion;

[0025] Or any point on the edge portion corresponding to two points at a first preset distance divides the edge portion between the two points into a first segment and a second segment, the line passing through the point tangent to the first segment is the first tangent, and the line passing through the point tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is greater than or equal to 135°, the edge portion corresponding to the two points is a straight edge portion.

[0026] Furthermore, the first preset distance has a value range of 30 mm to 300 mm.

[0027] Furthermore, the vertical distance from any point on the edge portion corresponding to the two points of the first preset distance to the line segment formed by the two points is the second preset distance, and when the second preset distance is greater than n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is the corner portion;

[0028] Or the corner portion includes a vertex and two ends connected to each other; any point on the edge portion corresponds to two points at a first preset distance, and the edge portion between the two points is divided into a first segment and a second segment. The line passing through the point and tangent to the first segment is the first tangent, and the line passing through the point and tangent to the second segment is the second tangent. When the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner portion.

[0029] Furthermore, when the electrochromic film is charged and discharged, the maximum electric field intensity of the corner area corresponding to the corner electrode is E 3max , the minimum electric field intensity of the edge part is E 4min ;

[0030] Among them, E 3max <E 4min or E 3max and E 4min The difference between the 10% E 4minUp to 30% E 4min Inside.

[0031] Some embodiments of the present application provide a color-changing device, including a substrate layer and an electrochromic film stacked with the substrate layer, wherein the substrate layer and the electrochromic film are stacked.

[0032] Some embodiments of the present application provide a terminal product, including the electrochromic film as described in any one of the above or the color-changing device as described in the above, wherein the terminal product includes 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.

[0033] The embodiments of the present application have the following advantages: since the current in the spacing area is gradually reduced due to the influence of the conductive layer resistance in the electrochromic film during the process of diffusing to the corner, the distance between the spacing areas adjacent to the two ends of the corner electrode is increased by increasing the length of the corner electrode and / or increasing the size of the angle of the corner electrode, so as to reduce the superimposed current of the spacing area at the corner, thereby reducing the electric field strength at the corner close to the electrochromic film, avoiding the situation where the electric field strength at the corner of the electrochromic film is too high, resulting in accelerated aging of the corner of the electrochromic film, thereby achieving the balance of the electric field strength at the edge of the electrochromic film and improving the stability and service life of the electrochromic film.

[0034] 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

[0035] 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.

[0036] Figure 1 A schematic structural diagram of an embodiment of the electrochromic film in the present application is shown;

[0037] Figure 2 Shows this application Figure 1 A schematic structural diagram of the electrochromic film from another perspective;

[0038] Figure 3 Shows Figure 2 Middle AA section view;

[0039] Figure 4A schematic structural diagram of a first conductive layer of an embodiment of an electrochromic film in the present application is shown;

[0040] Figure 5 A schematic diagram showing the structure of the second conductive layer of an embodiment of the electrochromic film in the present application is shown;

[0041] Figure 6 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0042] Figure 7 A structural schematic diagram showing another embodiment of the electrochromic film in the present application;

[0043] Figure 8 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0044] Fig. 9 Shows Figure 8 Enlarged view of middle part B;

[0045] Fig.10 Shows Figure 8 Cross-sectional view of the middle CC section;

[0046] Fig.11 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0047] Fig.12 Shows Fig.11 Enlarged view of the middle D part;

[0048] Fig.13 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0049] Fig.14 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0050] Fig.15 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0051] Fig.16 A schematic structural diagram of an embodiment of the color changing device in the present application is shown.

[0052] Description of main component symbols:

[0053] 100-electrochromic film; 110-corner electrode; 111-first corner electrode; 112-second corner electrode; 120-straight-edge electrode; 121-first straight-edge electrode; 122-second straight-edge electrode; 130-first spacing area; 140-second spacing area; 150-first substrate layer; 160-first conductive layer; 170-electrochromic layer; 180-second conductive layer; 190-second substrate layer; 200-bus bar; 210-first bus bar; 220-second bus bar; 300-central portion; 400-first groove; 500-second groove; 600-first barrier portion; 700-second barrier portion; 800-edge portion; 900-substrate layer; 1000-shielding layer. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The following is combined with Figure 1 To Attachment Fig.16 This application is described in further detail.

[0060] like Figure 1 and Fig.13 As shown, some embodiments of the present application provide an electrochromic film 100, which can be mainly used in intelligent dimming fields such as glass curtain walls, car side windows, sunroofs, sun visors, rearview mirrors, and electronic equipment housings. The electrochromic film 100 changes color by changing the voltage across the two ends of the electrochromic film 100, so as to adjust the amount of light passing through the electrochromic film 100.

[0061] Specifically, the electrochromic film 100 includes a corner electrode 110 disposed at an edge corner of the electrochromic film 100 , and a straight edge electrode 120 disposed at an edge non-corner portion of the electrochromic film 100 , that is, a straight edge portion.

[0062] Among them, combined Figure 2 as well as Figure 3 As shown, the electrochromic film 100 includes a first substrate layer 150 , a first conductive layer 160 , an electrochromic layer 170 , a second conductive layer 180 , and a second substrate layer 190 which are stacked in sequence.

[0063] In addition, the first substrate layer 150 and the second substrate layer 190 are both made of transparent flexible materials such as PET (Polyethylene terephthalate) or PC, and the first conductive layer 160 and the second conductive layer 180 are both made of transparent ITO (Indium Tin Oxide) materials; in this embodiment, ITO is attached to the first substrate layer 150 and the second substrate layer 190 by magnetron sputtering. The electrochromic layer 170 includes an electrochromic material layer, an electrolyte layer and an ion conductive layer stacked in sequence. In other embodiments, the electrochromic layer 170 can also be liquid crystal, etc. The first conductive layer 160 and the second conductive layer 180 are respectively connected to an external power supply. After current is passed through the first conductive layer 160 and the second conductive layer 180, an electric field is formed between the first conductive layer 160 and the second conductive layer 180, so that the electrochromic layer 170 undergoes a stable and reversible color change under the action of the electric field.

[0064] For details, please refer to Figure 1 and Fig.10 , the electrochromic film 100 includes a central portion 300 and an edge portion 800 adjacent to the periphery of the central portion 300. The central portion 300 of the electrochromic film 100 is formed by stacking the central areas of the first substrate layer 150, the first conductive layer 160, the electrochromic layer 170, the second conductive layer 180 and the second substrate layer 190; the first substrate layer 150, the first conductive layer 160, the electrochromic layer 170, the second conductive layer 180 and the second substrate layer 190 located in the central portion 300 of the electrochromic film 100 completely overlap, and at the same time, the central portion 300 is also the color changing area and / or the visible area of ​​the electrochromic film 100. It is worth noting that for ease of understanding, Figure 1 The area within the middle dashed line frame represents the central portion 300 of the diaphragm, and the boundary between the central portion 300 and the edge portion 800 is not limited by the position of the dashed line in the figure.

[0065] In addition, continue to refer to Fig.10 The first substrate 150 extends from its central area to the outside of the electrochromic film 100 to form an edge portion 800 of the first substrate 150, and the second substrate 190 extends from its central area to the outside of the electrochromic film 100 to form an edge portion 800 of the second substrate 190; the projections of the edge portion 800 of the first substrate 150 and the edge portion 800 of the second substrate 190 on the electrochromic layer 170 at least partially do not overlap; the first conductive layer 160 also extends from its central area to the outside of the electrochromic film 100, and is attached to the surface of the edge portion 800 of the first substrate 150 to form an edge portion 800 of the first conductive layer 160; the second conductive layer 180 also extends from its central area to the outside of the electrochromic film 100, and is attached to the surface of the edge portion 800 of the second substrate 190 to form an edge portion 800 of the second conductive layer 180. The electrochromic layer 170 also extends from its central area to the outside of the electrochromic film 100 and is attached between the edge portion 800 of the first conductive layer 160 and the edge portion 800 of the second conductive layer 180 to form the edge portion 800 of the electrochromic layer 170; the edge portion 800 of the electrochromic film 100 includes the edge portion 800 of the first substrate layer 150, the edge portion 800 of the first conductive layer 160, the edge portion 800 of the electrochromic layer 170, the edge portion 800 of the second substrate layer 190, and the edge portion 800 of the first conductive layer 160. Specifically, as Fig.10 As shown, the edge portion 800 of the first substrate layer 150 and the edge portion 800 of the second substrate layer 190 can extend in opposite directions, that is, relative to the plane where the electrochromic film 100 is located, the first conductive substrate and the second conductive substrate extend in the X direction or the -X direction respectively, so that their projections do not overlap at all. In other embodiments, such as Figure 3As shown, the edge portion 800 of the first substrate layer 150 and the edge portion 800 of the second substrate layer 190 may extend in the same direction. In the embodiment of the present application, it is preferred that the first conductive substrate and the second conductive substrate on each side extend outwardly of the electrochromic film 100 ( Figure 3 The first conductive layer 160 and one of the bus bars are electrically connected as the positive electrode or negative electrode of the electrochromic film 100 through the non-overlapping projections of the edge portion 800 of the first substrate 150 and the edge portion 800 of the second substrate 190, and the second conductive layer 180 and another bus bar are electrically connected as the negative electrode or positive electrode of the electrochromic film 100, so as to provide voltage for the electrochromic layer 170.

[0066] Wherein, the edge portion 800 includes a corner portion and a straight side portion, the number of the corner portions and the number of the straight side portions are multiple, respectively, and are associated with the shape of the electrochromic film 100. For example, when the shape of the electrochromic film 100 is a polygon, at this time, the number of the corner portions is equal to the number of the sides of the electrochromic film 100. It can be understood that if the shape of the electrochromic film 100 is a quadrilateral, the number of the corner portions is four, and when the shape of the electrochromic film 100 is an n-gon, the number of the corner portions is n. Of course, in other embodiments, the shape of the electrochromic film 100 can be an irregular shape. For the irregular shape, there are curved parts on the edge, and the curved parts correspond to the corners. In addition, the curvature of the edge portion 800 can be considered as a straight side portion within a certain range, so as to indicate that this portion can be approximately regarded as a straight line portion.

[0067] In addition, in the preferred solution of the present application, in the edge portion 800 of the electrochromic film 100, the vertical distance from any point on the edge portion 800 corresponding to the two points at the first preset distance to the line segment formed by the two points is the second preset distance, when the second preset distance is greater than n times the first preset distance, the value range of n is 5% to 10%, and the edge portion 800 corresponding to the two points is a corner portion; conversely, when the second preset distance is less than or equal to n times the first preset distance, the value range of n is 5% to 10%, and the edge portion 800 corresponding to the two points is a straight edge portion. The first preset distance is 5 cm to 20 cm; wherein the second preset distance is 5% to 10% of the first preset distance, preferably 6%. For example, the distance between the farthest point in the electrode corresponding to the two points with a first preset distance of 5 cm and the line connecting the two points is less than 0.3 cm. For another example, the distance between the farthest point in the electrode corresponding to the two points with a distance of 10 cm and the line connecting the two points is less than 0.5 cm. For example, if the distance between the farthest point of the electrode corresponding to two points 20 cm away and the line connecting the two points is less than 1 cm, the corresponding part within the two points is considered to be a straight edge. Specifically, the size of the first preset distance is related to the size of the electrochromic device, the material of the conductive layer, and the length of the electrode of the electrochromic device, and can be adjusted accordingly according to the specific actual use situation. It is worth noting that when the maximum value of the distance between the corresponding edge portion 800 and the line connecting the two end points is greater than the second preset distance, the edge is considered to be a corner portion, and the corresponding electrode is a corner electrode. Alternatively, the two straight edges intersect to form the corner portion, and the angle between the two straight edges is less than 135°. In an embodiment of the present application, the corner portion includes the ends of the two connected straight edges, the corner area is the area formed between the ends of the two connected straight edges, and the angle between the two straight edges is less than 135°; the length of the end of the specific straight edge portion is set according to the size of the electrochromic device. Or the area between the edge portion 800 corresponding to the maximum distance between the lines connecting the two end points is greater than the second preset distance is the corner portion. When the angle between two connected straight edge portions is greater than 135°, it can also be considered that the two straight edge portions constitute a new straight edge portion.

[0068] Further, based on the above embodiment, any point on the edge portion 800 corresponding to two points at a first preset distance divides the edge portion 800 between the two points into a first segment and a second segment, a line passing through the point tangent to the first segment is a first tangent, a line passing through the point tangent to the second segment is a second tangent, and when the angle between the first tangent and the second tangent is greater than or equal to 135°, the edge portion 800 corresponding to the two points is a straight edge. Further, the corner portion includes a vertex and two ends connected to each other; any point on the edge portion 800 corresponding to the two points at a first preset distance divides the edge portion 800 between the two points into a first segment and a second segment, a line passing through the point tangent to the first segment is a first tangent, a line passing through the point tangent to the second segment is a second tangent, and when the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner portion.

[0069] Specifically, each corner of the film is provided with a corner electrode, and the corner electrode protrudes toward the corner of the electrochromic film 100 to be away from the central part 300 of the electrochromic film 100, which is equivalent to setting the corner area away from the visible area. Even if a corner failure occurs in the corner area, it is blocked by the shielding layer to reduce the visual impact of the user. The straight edge portion is provided with a plurality of spaced straight edge electrodes, and the straight edge electrodes are spaced from the corner electrodes to form a multi-electrode structure at the edge portion 800 of the electrochromic film 100. The corner electrodes and the straight edge electrodes of the same polarity are respectively electrically connected to the bus bars of the same polarity, where the bus bars of the same polarity can refer to one bus bar or multiple bus bars. When referring to a bus bar, it means that the corner electrodes and straight-edge electrodes of the same polarity are electrically connected to the same bus bar; when referring to multiple bus bars, each straight-edge electrode of the same polarity is electrically connected to a bus bar, each corner electrode of the same polarity is electrically connected to another bus bar, and the polarity of each bus bar is the same. In addition, the bus bars of the same polarity here refer to the connection with the positive or negative pole of the external power supply. Preferably, in an embodiment of the present application, there is one bus bar, which is attached along the edge of the electrochromic film 100 and is electrically connected to the corner electrodes and straight-edge electrodes of the same polarity in turn, and the bus bar can be connected to the positive or negative pole of the external power supply; of course, in other embodiments, there may be multiple bus bars of the same polarity, and the multiple bus bars are first attached to the corner electrodes and straight-edge electrodes, and then the bus bars are connected in series and connected to the positive or negative pole of the external power supply.

[0070] It should be noted that the bus bar electrically connected to the corner electrodes and the straight-edge electrodes can form an electrical connection with the negative and positive electrodes of an external power source; in this way, when the electrochromic film 100 is electrically connected to the external power source through the bus bar, the current of the external power source is conducted to the corner electrodes and the straight-edge electrodes of the electrochromic film 100 through the bus bar, and at the same time, the current is conducted to the first conductive layer 160 and the second conductive layer 180 through the corner electrodes and the straight-edge electrodes, so as to form an external electric field between the first conductive layer 160 and the second conductive layer 180, so that the electrochromic layer 170 undergoes a stable and reversible color change under the action of the external electric field.

[0071] The inventors found that in the prior art, when the corner electrode 110 and the straight-edge electrode 120 are electrically connected to an external power source through a bus bar, an electric field is formed between the positive electrode and the negative electrode. At the beginning of charging and discharging, due to the setting of a full circle of bus bars, the potential of the first conductive layer 160 and the second conductive layer 180 stacked in the interval between the corner electrode 110 and the adjacent straight-edge electrode 120 is relatively large, and the distance between the two is very small (the difference between the two is the thickness of the electrochromic stacking layer), usually only tens of microns, therefore, in the process of charging and discharging the film, an electric field is formed in the interval between the corner electrode 110 and the adjacent straight-edge electrode 120, and for the electric field formed between a single corner electrode 110 and the straight-edge electrode 120, the electric field strength of the single interval is the strongest, and the closer to the corner electrode 110 and the straight-edge electrode 120, the greater the electric field strength, therefore, in the process of charging and discharging, the field strength of the electrochromic film 100 gradually weakens from between the corner electrode and the straight-edge electrode to the outside. When the membrane is connected to electricity for charging and discharging, an electric field is formed between the two adjacent electrodes on both sides of the corner area of ​​the membrane. The electric field in the interval area on both sides of the corner of the electrochromic membrane 100 gradually decreases toward the corner area, and an electric field superposition is formed in the corner area. Finally, a new superimposed electric field is formed in the corner area of ​​the membrane, resulting in a stronger field strength in the corner area than in the interval area. Long-term charging and discharging causes the area to fail prematurely. Among them, the area formed by the X-axis and Y-axis at both ends of the corner electrode corresponding to the edge of the corner electrode is called the corner area.

[0072] Therefore, in one embodiment of the present application, the length of the corner electrode 110 is L 1 The length of the corner electrode refers to the sum of the lengths of the corner electrodes, that is, the sum of the paths along which the corner electrodes extend (for example, when the corner electrode includes two connected sides, the sum of the lengths of the two sides is the length of the corner electrode); the average length L of the straight-edge electrode 120 2 The length of the straight-edge electrode 120 refers to the length of the straight-edge electrode extending from both ends to both sides. The average length of the straight-edge electrode L 2 , the ratio of the sum of the lengths of the straight-edge electrodes 120 to the number of the straight-edge electrodes 120; where L2 <L 1 . That is, the average length of the straight-edge electrode is smaller than the length of the corner electrode. Preferably, the average length of the straight-edge electrode 120 is greater than or equal to 10 mm. Preferably, the length of the straight-edge electrode closest to the corner electrode is smaller than the length of the corner electrode, the polarity between the adjacent corner electrode and the straight-edge electrode is different, and the polarity between the two adjacent straight-edge electrodes is different, so an electric field is formed between the two adjacent electrodes during the charge and discharge process, and the closer the position is to the middle of the two adjacent electrodes, the greater the field strength, and the farther away from the two electrodes, the weaker the field strength. In the embodiment of the present application, by increasing the length L of the corner electrode 110 1 , to increase the distance between the two ends of the corner electrode, that is, to increase the distance between the positions where the electric field is the strongest; the longer the length of the corner electrode, the farther the positions where the electric field is the strongest are, so that the position where the electric field is superimposed in the corner area is farther away from the position where the electric field is the strongest, and because the electric field strength in the interval area tends to gradually weaken from the central area to the surrounding areas, the two superimposed electric field strengths are weakened relative to the prior art, thereby avoiding excessively high electric field strength in the corners of the electrochromic film 100, thereby alleviating the speed of failure of the corners of the electrochromic film 100. In addition, the electric field strength in the corner area after superposition can be made closer to the electric field strength in the interval area, making the field strength of the entire film more uniform; the electric field strength of the edge portion 800 of the electrochromic film 100 is balanced, thereby effectively preventing the failure of the corners of the electrochromic film 100, and improving the stability and service life of the electrochromic film 100.

[0073] In addition, in addition to the electric field formed between the positive and negative electrodes causing corner failure, the current conducted on both sides of the corner electrode corresponding to the corner area will also cause the corner to fail prematurely. Since bus bars will be attached on both sides of the corner electrode, the surface resistance of the conductive layer corresponding to the corner area will be relatively small compared to other areas. Both sides of the corner electrode will diffuse and conduct current from the electrode to the membrane, and current superposition will occur in the corner area, causing the local electric field to be too strong, thereby causing overcharging and over-discharging in the area; in view of this, some embodiments of the present application are improved on the basis of any of the above embodiments, and the corner electrode includes a first side extending along a first direction and a second side extending along a second direction, and the value range of the angle α between the first side and the second side is set to: 45°≤α≤135°, specifically, the value range of α is 45°≤α≤135°, 50°≤α≤135°, 55°≤α≤135°, 60°≤α≤135°, 65°≤α≤1 35°, 70°≤α≤135°, 75°≤α≤135°, 80°≤α≤135°, 85°≤α≤135°, 90°≤α≤135°, 95°≤α≤135°, 100°≤α≤135°, 105°≤α≤135°, 110°≤α≤135°, 115°≤α≤135°, 120°≤α≤135 Any range of α≤95°, α≤100°, α≤115°, α≤110°, α≤105°, α≤100°, α≤95° and α≤90°. It can be understood that the larger the angle between the two sides of the corner electrode is, the larger the distance between the two sides is. At this time, due to the loss and voltage drop of the current during the conduction process, the farther the overlapping area is from the edge, so that even if the current overlaps, the current will not be too large, thereby alleviating the possibility of failure in the corner area. In addition, by adjusting the angle of the corner electrodes, the new electric field formed by the overlap and the electric field strength at the edge reach a balanced state; avoiding the electric field strength at the corner of the electrochromic film 100 to be too high, making the superimposed field strength closer to the field strength at the edge, and making the field strength of the entire film more uniform; achieving the balance of the electric field strength at the edge part 800 of the electrochromic film 100, thereby effectively preventing the corner failure of the electrochromic film 100 and improving the stability and service life of the electrochromic film 100.

[0074] Specifically, the first side and the second side of the corner electrode intersect, and the intersection may be at a point or at a chamfered arc. Exemplarily, the corner electrode also includes an arc, with both ends of the arc connecting the first side and the second side. The length of the arc can be regarded as a point relative to the first side and the second side, that is, the length of the arc is relatively small relative to the first side and the second side.

[0075] Preferably, when the length of the corner electrode is constant, that is, the sum of the lengths of the two sides of the corner electrode is constant, or when the corner electrode is less than or equal to the length of the straight-edge electrode, the angle α of the corner electrode has a value range of 90°≤α≤135°. It can be understood that the larger the value of α, the farther the distance between the two ends of the corner electrode is, that is, the larger the distance between the two intervals adjacent to the corner electrode. It can be seen from the above embodiments that the larger the distance between the intervals at the two ends of the corner electrode, the smaller the superimposed electric field generated in the corner by the current passing through the interval during the diffusion process, which effectively reduces the electric field strength in the corner, thereby effectively preventing the corner failure of the electrochromic film 100. Specifically, in the edge portion 800, when the lengths of the two adjacent sides of the corner electrode are equal, by increasing the value of the angle α of the corner electrode, the distance between the two ends of the corner electrode can be increased, thereby increasing the distance between the two intervals adjacent to the corner electrode, and also increasing the distance between the two sides of the corner electrode; when the lengths of the two adjacent sides of the corner electrode are not equal, by increasing the value of the angle α of the corner electrode, the distance between the two ends of the corner electrode can also be increased, and its effects are not repeated here. In addition, when the value of the angle α of the corner electrode is too large, it may affect the wiring of the electrochromic film 100, thereby affecting the appearance of the entire electrochromic film 100. Therefore, in order to improve the wiring efficiency and wiring quality on the electrochromic film 100 and improve the aesthetic appearance of the electrochromic film 100, the value range of the angle α of the corner electrode is preferably 90°≤α<135°.

[0076] Preferably, when the value range of α is 45°≤α≤90°, the length of the corner electrode can be increased. 1 Not less than 10% of the total length of the edge portion 800. Thus, by increasing the length of the corner electrode, the distance between the two spacing areas adjacent to the corner electrode can be increased to avoid the corner area failing rapidly due to the distance between the two sides of the corner electrode being too small when the angle of the corner electrode is an acute angle, and the distance between the two ends of the corner electrode being too small. In addition, by increasing the length of the corner electrode, the conduction speed of the current from the corner electrode to the central portion 300 of the electrochromic film 100 can be increased, thereby increasing the discoloration speed of the electrochromic film 100. Specifically, when the angle α of the corner electrode is too small, for example, less than 45°, the distance between the two ends of the corner electrode is too short, and the distance between the two sides of the corner electrode is too small, so that the superimposed electric field in the corner electrode area is large, and the corner failure of the electrochromic film 100 cannot be effectively avoided. The failure of the corner area can be avoided by increasing the electrode; therefore, the preferred value range of α is 45°<α≤90°.

[0077] Preferably, based on any of the above embodiments, an improvement is made, wherein the length L of the corner electrode is1 Greater than the average length L of the straight-edge electrode 2 ; and the value range of the angle α of the corner electrode is: 45°≤α≤135°; while increasing the length of the corner electrode, the angle of the corner electrode is increased, reducing the influence of the electric field formed between the spacing areas on the corner area, and reducing the influence of the current conducted between the two sides of the corner electrode on the corner area; in addition, the angle of the corner electrode is also guaranteed so that the angle will not affect the wiring of the corner electrode, and at the same time, the influence of the current on the area is also reduced.

[0078] It can be seen that the problem of excessive field strength in the corner area can be solved simply by adjusting the angle of the corner electrode, thereby solving the technical problem of premature failure in the corner area; the problem of excessive field strength in the corner area can also be reduced by increasing the length of the corner electrode alone, thereby solving the technical problem of premature failure in the corner area; the angle and length can also be adjusted at the same time to make the field strength of the entire diaphragm more balanced, further improving the field strength balance of the diaphragm during use, reducing the possibility of premature failure in local areas of the diaphragm, and improving the service life of the diaphragm. Since the current on both sides of the corner electrode diffuses in the same conductive layer, and the conductive layer has surface resistance, the electrochromic diaphragm 100 is affected by the surface resistance of the conductive layer and has a voltage drop. Therefore, the farther away from the electrode, the slower the current conduction speed, the smaller the corresponding voltage, and the smaller the corresponding electric field strength. At this time, by increasing the angle of the corner electrode to increase the distance between the two sides of the corner electrode, the point where the current conducted by the straight-edge electrode and the corner electrode diffuses and overlaps is relatively far from both the straight-edge electrode and the corner electrode. At this time, the overlapping part is affected by the voltage drop of the conductive layer, and the voltage at the overlapping part will be reduced relative to other areas, and the superimposed electric field strength will be reduced. The farther the distance, the greater the relative reduction, so that the corner failure of the electrochromic film 100 can be effectively prevented to achieve the balance of the electric field strength at each position in the electrochromic film 100 and increase the service life of the electrochromic film 100. And / or increase the length of the corner electrode. By increasing the length of the corner electrode, the distance between the two ends of the corner electrode can also be increased. The effect is the same as increasing the angle of the corner electrode, which will not be repeated here. Generally speaking, the smaller the value of α, the greater the influence of the corner area on the two sides of the corner electrode; and the larger the length of the corner electrode, the greater the influence of the electric field of the spacer area adjacent to the corner electrode on the corner area. That is to say, the smaller the value of α, the larger the length of the corresponding corner electrode; and vice versa. Therefore, the value of α and the value of the length of the corner electrode should be within a reasonable range, so that the electric field in the corner area is balanced with the electric field in other areas, and the electric field in the corner is prevented from being much smaller than that in other areas, which causes uneven field strength in the entire diaphragm. For example, when the value of α is greater than 45° and less than 60°, the length of the corner electrode is greater than 2 times the length of the straight-edge electrode; when the value of α is greater than 60° and less than 90°, the length of the corner electrode is greater than 1.5 times and less than 2 times the length of the straight-edge electrode. If the value of α is greater than 90° and less than 135°, the length of the corner electrode is greater than 1 times and less than 1.5 times the length of the straight-edge electrode. In this embodiment, by adjusting the length of the corner electrode and the angle of the corner electrode, the distance between the two sides of the corner electrode reduces the influence on the corner area, just satisfying the superposition of the influence of the two adjacent spacing areas on the corner area, so that the field strength in the corner area is more balanced with the field strength in the non-corner area, and the local area of ​​the diaphragm will not fail prematurely and affect the service life of the diaphragm.

[0079] It is worth noting that the influence range of the electric field formed at the interval is not only related to the applied voltage and current. For the same bus bar in the same electrochromic film 100, when the resistance of the entire bus bar is uniform and small, the voltage and current of the entire bus bar are basically the same. At this time, the electric field strength formed in the interval is related to the length of the interval and the length of the electrode. In general, the influence range of the electric field strength in the interval is positively correlated with the length of the electrode. Generally, the influence range of the electric field will be smaller than the length of the electrode.

[0080] Therefore, the longer the corner electrode length is set, the farther the electric field overlaps from the electric field center, and the electric field of a single electric field in the overlapping area is much smaller, so the superposition of the two electric fields will not be too large, and is close to the strength of a single electric field. In this way, the electric field strength of the entire electrochromic film 100 is balanced, avoiding premature failure of the corner of the electrochromic film 100.

[0081] Preferably, based on any of the above embodiments, the L 1 and the L 2 Between the satisfaction, L 2 <L 1 <4×L 2 , that is, the length of the corner electrode 110 is between 1 and 4 times the average length of the straight-edge electrode 120. Preferably, the length of the corner electrode 110 is between 1 and 2 times the average length of the straight-edge electrode 120. Preferably, L 1 and the L 2 The difference is greater than 20% L 2 . Specifically, the length of the corner electrode is equal to the sum of the length of the first side and the length of the second side of the corner electrode. Since there is an angle α between the first side and the second side of the corner electrode, when the length of the corner electrode is constant, the smaller the value of α is, the shorter the distance between the two ends of the corner electrode is, and when the value of α is larger, the distance between the two ends of the corner electrode is longer. When the value of α is constant, such as in some devices where the diaphragm corner is limited and it is not suitable to arrange a corner electrode with a large angle, the length L of the corner electrode can be increased. 1 , to further increase the distance between the two ends of the corner electrode 110, thereby increasing the distance between the two spacing areas adjacent to the corner electrode, so that the spacing area adjacent to the corner electrode has less influence on the corner area, so that the difference between the field strength of the corner area of ​​the electrochromic film 100 and other areas is within a preset range, thereby improving the balance of the electric field strength of the edge part 800 and the central part 300 of the electrochromic film 100, avoiding premature failure of the corner part of the electrochromic film 100, and thus increasing the service life of the film.

[0082] In addition, the specific multiples of the ratio between the straight-edge electrode 120 and the corner electrode 110 can be adjusted accordingly according to the material and the size of the electrochromic film 100 to improve the balance of the electric field strength between the corner and the straight-edge portion of the electrochromic film 100, thereby improving the balance of the electric field strength of the entire electrochromic film 100.

[0083] Preferably, in some embodiments of the present application, the straight-line distance between the two ends of the corner electrode is L, wherein L and L 2 Between: L 2 <L. Further, said L and said L 2 Between: L 2 <L<4×L 2 , preferably, L = 2 × L 2 Furthermore, the sum of the lengths of the first side and the second side is equal to 2 times L 2 . Preferably, the lengths of the first side and the second side are equal. That is, the first side and the second side are equal to the average length of the straight-edge electrode; the inventors found that when the first side and the second side are equal to the average length of the straight-edge electrode, when a certain voltage is applied to the diaphragm, the electric field strength in the corner area is balanced with the electric field strength in the spacing area, or the error is within a certain range. Specifically, the method of increasing the distance L between the two ends of the corner electrode includes at least one of the following methods: when the length L of the corner electrode is equal to 1 When the angle α is constant, increase the length of the first side or the second side of the corner electrode; when the length L of the corner electrode 1 When the angle α of the corner electrode is constant, increase the angle of the corner electrode, and / or increase the length of the first side or the second side of the corner electrode; when the angle α of the corner electrode is constant, increase the length L of the corner electrode 1 , and / or increase the length of the first side or the second side of the corner electrode; in addition, increase the length L of the corner electrode 1 At the same time, the angle α of the corner electrode is increased.

[0084] Since both ends of the corner electrode are adjacent to the spacing area, when the corner electrode 110 and the straight-edge electrode 120 arranged on the electrochromic film 100 are respectively electrically connected to the external power supply, the current of the external power supply is transmitted to the central part 300 of the electrochromic film 100 and the spacing area arranged in the electrochromic film 100 through the corner electrode and the straight-edge electrode. Since there is a voltage drop in the conduction process of the current due to the surface resistance of the conductive layer, the farther away from the corner electrode, the smaller the conduction speed is, and the corresponding voltage is also smaller, and the current transmitted to the spacing area is transmitted and diffused to the surrounding area with the spacing area as the center. Therefore, by increasing the distance between the two ends of the corner electrode, the distance of the current in the interval area at the two ends of the corner electrode to the overlapping part in the corner (the overlapping part refers to the area where the current in the interval area overlaps in the corner during the current diffusion process in the interval area at the two ends of the corner electrode) is increased, thereby avoiding excessive superposition current in the corner, thereby avoiding overcharging and overdischarging in the corner area of ​​the electrochromic film 100, and making the electrochromic layer 170 in the corner uniformly discolored with other areas, thereby effectively preventing the corner failure of the electrochromic film 100. Preferably, the value range of L is 1-2 times of L 2 .

[0085] like Figure 2 , Figure 3 As shown, in some embodiments of the present application, a first spacing region 130 is formed between the corner electrode 110 and the adjacent straight edge electrode 120, and the length of the first spacing region 130 is L 3 The spacing regions adjacent to the two ends of the corner electrode in any of the above embodiments are the first spacing regions 130 in this embodiment. The length of the first spacing region 130 refers to the distance between the two ends of the first spacing region 130 in the extension direction of the straight edge portion 800 of the edge portion of the electrochromic film 100.

[0086] At the same time, a second spacing region 140 is provided between adjacent straight-edge electrodes 120, and the length of the second spacing region 140 is L. 4 The length of the second spacer 140 refers to the distance between the two ends of the second spacer 140 in the extending direction of the straight side of the edge portion 800 of the electrochromic film 100 .

[0087] Among them, L 4 ≤L 3, that is, the length of the first spacing area 130 is greater than or equal to the length of the second spacing area 140. The distance of the first spacing area 130 affects the intensity of the electric field generated there. Generally speaking, the larger the length of the first spacing area 130, the smaller the field intensity at the corresponding location, which is equivalent to reducing the electric field at the location, and further reducing the influence of the two adjacent electric fields on the corner area. In addition, by increasing the length of the first spacing area 130, the distance from the straight-edge electrode adjacent to the two ends of the corner electrode to the corner electrode is increased, so that the distance of the current transmitted to the straight-edge electrode to the corner electrode is increased. Since there is a voltage drop due to the surface resistance of the conductive layer when the current diffuses, the farther away from the electrode, the smaller the conduction speed and the corresponding voltage, that is, the smaller the superimposed current formed by the current of the straight-edge electrodes adjacent to the two ends of the corner electrode diffusing to the corner electrode, so as to reduce the current of the corner electrode, thereby effectively preventing the corner failure of the electrochromic film 100. In addition, since the length of the first spacer 130 is not less than the length of the second spacer 140, the field intensity generated by the second spacer 140 can be increased by reducing the length of the second spacer 140, so that the electric field intensity of the corner area after the electric fields of the two adjacent first spacers 130 overlap is less than or close to the electric field intensity generated by the second spacer 140, thereby alleviating the possibility of failure in the corner area or local area and increasing the service life of the electrochromic film 100. In addition, the length of the first spacer 130 is increased to reduce the electric field intensity generated by the first spacer 130, so the electric field intensity diffused by the first spacer 130 is also reduced, thereby reducing the superimposed electric field intensity of the first spacers 130 located on both sides of the corner area in the corner area, so as to alleviate the possibility of failure in the corner area, thereby improving the balance of the electric field intensity of the edge portion 800 of the electrochromic film 100.

[0088] In some embodiments of the present application, when the bus bar 200 is electrically connected to an external power source, the current of the external power source is conducted to the space between the corner electrode 110 and the straight edge electrode 120 through the bus bar 200, and an electric field is formed between the positive and negative electrodes and the two adjacent electrodes, and the electric field forms a superimposed new electric field in the corner area. At this time, the electric field in the corner area is E 1 , the electric field in the non-corner region is E 2 It should be noted that the electric field in the non-corner area is E 2 It means that the electric field strength during the charging process in the non-corner area is E 2 After charging is completed, the field strength at each point should be uniform and the transmittance should also be uniform. The non-corner area refers to the area outside the center part 300 except the corner part.

[0089] When the electrochromic film 100 is charged and discharged, the area corresponding to the corner electrode in the electrochromic film 100 is a corner area, and the maximum electric field intensity in the corner area is E1max The electric field in the non-corner area of ​​the electrochromic film 100 is E 2 The non-corner area is the central portion 300 of the electrochromic film 100 except the corner area, wherein E 1max <E 2 or E 1max and E 2 The difference between them is within the preset range, preferably, E 1max and E 2 The difference between them is within the preset range, preferably, E 1max and E 2 The absolute value of the difference between E and E is 10% E 2 Up to 30% E 2 , preferably 20% E 2 In addition, E 1max It refers to the maximum electric field intensity in the corner area when the bus bar 200 is electrically connected to an external power source to supply power to the bus bar.

[0090] Specifically, by setting the strongest electric field E in the corner area 1max The electric field strength E in the non-corner area 2 The difference is within a preset range to reduce the difference between the electric field strength in the corner area and the electric field strength in the non-corner area, thereby preventing the conductive layer in the corner area from aging prematurely or causing the electrochromic layer 170 to fail prematurely due to overcharging or overdischarging; in addition, E 1max The electric field strength E in the non-corner area 2 When the difference is within a preset range, the balance of the electric field strength between the corner area and the non-corner area in the electrochromic film 100 can be improved, thereby improving the stability and service life of the electrochromic film 100 .

[0091] Since the electric field strength in the spacer is related to the length of the spacer and the length of the electrode, in general, the influence range of the electric field is positively correlated with the length of the spacer.

[0092] By controlling the electric field superposition intensity of the electric field in the spacing area in the corner area of ​​the electrochromic film 100, the electric field intensity in the corner area of ​​the electrochromic film 100 is reduced, and the superimposed electric field in the corner area is prevented from being greater than the electric field intensity in the non-corner area, thereby balancing the electric field intensity of the entire film and reducing premature failure of the corner.

[0093] like Figure 1 , Figure 6 and Fig.15 As shown, in some embodiments of the present application, when the electrochromic film 100 is electrically connected to an external power source, that is, when the electrochromic film 100 is charged and discharged, the maximum electric field intensity in the corner area corresponding to the corner electrode 110 is E 3max, the minimum electric field strength of the edge portion 800 is E 4min It should be noted that, since the lengths of the two sides of the corner electrode 110 are equal, the distances from the two ends of the corner electrode 110 to the angular bisector of the corner electrode are equal, that is, the maximum superimposed electric field in the corner area is on the angular bisector of the corner electrode 110; wherein, E 3max <E 4min or E 3max and E 4min The difference between is within a preset range. 3max and E 4min The absolute value of the difference between E and E is within the range of 10% E 4min Up to 30% E 4min , preferably 20% E 4min . E 3max It refers to the maximum electric field in the corner area corresponding to the corner electrode. It can be the maximum electric field intensity during the charge and discharge process, or the point with the maximum field intensity in the corner area. 4min It refers to the minimum electric field in the electric field strength at each point of the edge portion 800 when the straight-edge electrode and the corner electrode are electrically connected to the external power supply and the edge portion 800 is charged and discharged. Since the minimum electric field of the edge portion 800 is greater than the maximum electric field of the corner area, the electric field strength of the corner area is less than the electric field strength of the edge portion 800, so as to reduce the field strength of the corner area of ​​the electrochromic film 100, thereby alleviating the failure of the corner area. In addition, the difference between the field strength of the edge portion 800 and the electric field of the corner area can also be adjusted to avoid the electric field strength of the corner area being too large, resulting in the electrochromic layer 170 corresponding to the corner area being overcharged and over-discharged and failing prematurely.

[0094] In addition, in two adjacent sides of the corner area, the field strength of two adjacent first spacing areas 130 at the overlapping part of the corner area is E 5 Specifically, two adjacent first spacing regions 130 form a superimposed electric field in the corner area, and the superimposed electric field is E 5 The electric field generated by the second spacer 140 is E 6 , where E 5 <E 6 or E 5 and E 6 The difference between is within a preset range. 5 and E 6 The difference between them is E and the absolute value range is 10% E 6 Up to 30% E 6 , preferably 20% E 6 By adding E 5 With E 6The difference between them is set within a preset range to avoid a large difference between the superimposed electric field strength of the first spacing area 130 in the corner area and the electric field strength of the second spacing area 140, which causes premature aging of the conductive layer in the corner area, so as to improve the balance of the electric field strength between the corner area and the second spacing area 140 in the electrochromic film 100 and improve the stability of the electrochromic film 100.

[0095] Preferably, based on any of the above embodiments, an improvement is made, in which the straight-line distance between two adjacent first spacing areas 130 (the distance between the two ends of the corner electrode) is greater than or equal to the influence range of the electric field of the first spacing area 130, preferably greater than twice. The influence range refers to the length of the electric field from the center of the electric field to the minimum influence of the electric field. Generally speaking, the field strength of the superposition of two electric fields at one-half of the influence range is the largest; therefore, when the length of two adjacent first spacing areas 130 is greater than the influence range of the electric field of the first spacing area 130, the overlapping part of the electric field of the two first spacing areas 130 is far away from the influence range greater than one-half. Since the electric field weakens from the center to the surroundings, the field strength at the superposition is less than the strength of a single electric field, thereby effectively reducing the field strength in the corner area. Exemplarily, the field strength of two adjacent first spacing areas 130 is equal to E. 1 , and their influence ranges are both 10 cm. At this time, if the distance between the two ends of the corner electrode is also 10 cm, and the two sides of the corner electrode are equal, then the superposition field strength of the two adjacent first spacing areas 130 at a distance of 5 cm from the first spacing area 130 is the strongest, and the field strength of the single electric field at 5 cm is 1 / 2E 1 , then the field strength at the superposition point is E 1 , which is equal to the field strength of a single first spacing area 130. If the distance between the two ends of the corner electrode is greater than 10 cm, the electric fields of the two first spacing areas 130 will overlap in the area 5 cm away. At this time, the field strength of a single first spacing area 130 5 cm away is less than 1 / 2E 1 , so the two are less than 1 / 2E 1 The electric field strength after superposition is less than E 1 , thereby reducing the field strength at that location, effectively reducing the aging rate of the conductive layer at that location, and reducing the overcharge and over-discharge of the electrochromic layer 170 at that location, which may cause failure in the corner area of ​​the diaphragm.

[0096] Specifically, as shown in reference 15, the figure shows the field intensity distribution of one corner area. The dotted lines in the figure represent the influence of the electric field lines generated by the first spacing areas 130 at both ends of the corner electrode. The intersection and overlap of the dotted lines is the superposition of the electric fields in the two first spacing areas 130 in the corner area. The area at this location is stronger than a single electric field due to the superposition of field intensity. In addition, the influence of the electric field intensity generated by the second spacing area 140 is the same as the influence of the electric field intensity generated by the first spacing area 130.

[0097] like Figure 2 , Figure 3 and Fig.10 As shown, in some embodiments of the present application, the edge portion 800 of the electrochromic film 100 is provided with a first groove 400 and a second groove 500 at intervals. The number of the first grooves 400 and the number of the second grooves 500 can be one, two or more than two arbitrary numerical values, respectively, and can be specifically set according to actual conditions. In this embodiment, the first grooves 400 and the second grooves 500 are alternately provided on each side of the electrochromic film 100, and all the first grooves 400 and the second grooves 500 are alternately spaced and distributed in the circumference of the entire edge portion 800, and there is a gap between adjacent first grooves 400 and second grooves 500.

[0098] The bus bar 200 includes a first bus bar 210 and a second bus bar 220 , and the first bus bar 210 and the second bus bar 220 are respectively arranged on both sides of the electrochromic edge in the thickness direction.

[0099] The corner electrode 110 includes a first corner electrode 111 and a second corner electrode 112 with different polarities, where the different polarities refer to that the first corner electrode 111 is connected to the negative pole of the external power supply, and the second corner electrode 112 is used to connect to the positive pole of the external power supply; or the first corner electrode 111 is connected to the positive pole of the external power supply, and the second corner electrode 112 is used to connect to the negative pole of the external power supply. The straight-edge electrode 120 includes a first straight-edge electrode 121 and a second straight-edge electrode 122 with different polarities, where the different polarities refer to that the first straight-edge electrode 121 is connected to the negative pole of the external power supply, and the second straight-edge electrode 122 is connected to the positive pole of the external power supply; or the first straight-edge electrode 121 is connected to the positive pole of the external power supply, and the second straight-edge electrode 122 is connected to the negative pole of the external power supply; and the first corner electrode 111 and the first straight-edge electrode 121 are electrodes of the same polarity, that is, they are located in the same conductive layer, and the second corner electrode 112 and the second straight-edge electrode 122 are electrodes of the same polarity.

[0100] like Figure 3As shown, the first groove 400 penetrates the first substrate layer 150, the first conductive layer 160 and the electrochromic layer 170 along the thickness direction of the electrochromic film 100 to expose a portion of the second conductive layer 180, forming the first corner electrode 111 and the first straight-edge electrode 121. Specifically, when the first groove 400 is set at the corner of the edge portion 800, the first corner electrode 111 is formed at the corner; when the first groove 400 is set at the straight edge of the edge portion 800, the first straight edge electrode 121 is formed at the straight edge. The first bus bar 210 is attached along the edge of the electrochromic film 100, covering the first corner electrode 111 and the first straight electrode 121 and electrically connected to the first corner electrode 111 and the first straight electrode 121, that is, the first bus bar 210 is opposite to the first groove 400 and is electrically connected to the second conductive layer 180 exposed in the first groove 400, thereby electrically connecting the second conductive layer 180 to an external power source through the first bus bar 210.

[0101] In addition, the second groove 500 penetrates the second substrate layer 190, the second conductive layer 180 and the electrochromic layer 170 along the thickness direction of the electrochromic film 100 to expose a portion of the first conductive layer 160, forming the second corner electrode 112 and the second straight-edge electrode 122. Specifically, when the second groove 500 is disposed at the corner of the edge portion 800, the second corner electrode 112 is formed at the corner; when the second groove 500 is disposed at the straight edge of the edge portion 800, the second straight-edge electrode 122 is formed at the straight edge. The second bus bar 220 is located on the side of the electrochromic film away from the first bus bar 210, and is attached along the edge portion 800 of the electrochromic film 100 and is electrically connected to the second corner electrode 112 and the second straight-edge electrode 122, that is, the second bus bar 220 is opposite to the second groove 500 and is electrically connected to the first conductive layer 160 exposed in the second groove 500, thereby electrically connecting the first conductive layer 160 to an external power source through the second bus bar 220.

[0102] In the embodiment of the present application, the first groove 400 and the second groove 500 are alternately arranged at the edge of the electrochromic film 100, that is, the first straight-edge electrodes 121 and the second straight-edge electrodes 122 are alternately arranged at intervals at the straight edge of the edge portion 800. The first corner electrodes 111 and the second corner electrodes 112 are alternately formed at the corners of the edge portion 800, that is, the corner electrodes at adjacent corners of the edge portion 800 are different. The first corner electrode 111 and the first straight-edge electrode 121 are connected to the positive electrode of the external power supply through the first bus bar 210, and the second corner electrode 112 and the second straight-edge electrode 122 are respectively connected to the negative electrode of the external power supply through the second bus bar 220, so that the electrochromic film 100 is electrically connected to the external power supply. At the same time, a multi-electrode structure is formed at the edge portion 800 of the electrochromic film 100, so that the external power supply can be transmitted from multiple circumferential positions of the edge portion 800 of the conductive layer of the electrochromic film 100 to the central portion 300 of the conductive layer, and the current diffuses inward from all sides, thereby improving the electron conduction speed of the entire film, thereby improving the color change speed of the electrochromic film 100. In addition, since the first bus bar 210 and the second bus bar 220 are respectively arranged on both sides of the thickness direction of the edge portion 800 of the electrochromic film 100, the first bus bar 210 and the second bus bar 220 will not have a contact short circuit phenomenon, thereby improving the stability and safety of the connection between the electrochromic film 100 and the external power supply.

[0103] like Figure 8 , Fig. 9 as well as Fig.11 As shown, in some embodiments of the present application, the corner electrode 110 includes a first side and a second side, and the length of the first side is D 1 , the length of the second side is D 2 , where D 2 ≤D 1 The arc is convexly arranged toward the corner portion.

[0104] It is understandable that when the lengths of the two sides of the electrochromic film 100 are equal, or the length of the first side is greater than the second side, wherein the larger side extends toward the longer side of the film, and the specific length can be specifically set according to the actual size of the film. When the total length of the corner electrode remains unchanged, the electrode is set to different lengths of the sides according to the shape of the film, so that the lengths of the two ends of the corner electrode are adapted to the shape of the film, making the entire film structure more compact, and at the same time ensuring that the corner is not prone to premature failure; in addition, the design of one side long and one side short matches the shape of the film, so that each straight edge portion of the film has sufficient space to set the straight edge electrode. In the embodiment of the present application, as the length of the first side gradually increases, the length of the second side gradually decreases. At this time, the distance between the two ends of the corner electrode gradually increases, that is, the distance between the two intervals adjacent to the corner electrode gradually increases, thereby reducing the superposition effect of the current of the two intervals in the corner during the diffusion process, thereby avoiding the premature failure of the corner of the electrochromic film 100.

[0105] Some embodiments of the present application are improved on the basis of any of the above embodiments, such as Fig.16 As shown, the length of the edge portion 800 is D, and the length of the edge portion 800 refers to the perimeter of the edge portion 800; Fig.16As shown, the arc shape of the corner electrode, the radius of the corner electrode is N, wherein the value range of N is 1 / 9×D≤N. For example, if the angle between the two sides is 90°, the shape of the corner electrode is a right-angled arc formed by drawing 90° with N as the radius. If the angle between the two sides is 135°, the shape of the corner electrode is a 135° arc formed by drawing 90° with N as the radius. In this embodiment, the corner electrode is convexly arranged toward the corner portion, that is, the arc-shaped corner electrode is convexly arranged away from the central portion 300 of the diaphragm. In this embodiment, while ensuring that the distances between the two ends of the corner electrode are equal, the corner electrode is arranged in an arc shape, which is equivalent to increasing the distances from the two sides of the arc-shaped electrode to the superposition point of the two electric fields of the adjacent first spacing area 130, thereby reducing the influence of the current of the corner electrode on the superposition point of the two electric fields of the adjacent first spacing area 130, thereby reducing the electric field strength there, and preventing the problem of corner failure. In addition, generally speaking, the corners in the corner area are most prone to failure. The present application sets the electrode to an arc shape, which is equivalent to bypassing the original corner, so that the corner of the diaphragm is an arc, and a larger space is provided for current conduction to reduce the superposition intensity of the electric field. Correspondingly, the groove corresponding to the arc-shaped corner electrode is also an arc. Exemplarily, for diaphragms of different sizes, the corresponding radii are different. Generally speaking, for a device with a side length of 260 mm × 260 mm, the shape of the corner electrode is an arc with a radius of 30 mm and an angle of 90°; the side length satisfies the proportional relationship of the radius, and the length of the corner electrode is within a certain range, which can not only prevent corner failures, but also ensure the color change speed of the electrochromic film 100.

[0106] It is understandable that the arc length of the corner electrode can be increased by increasing the radius of the arc. Specifically, the arc length of the corner electrode is equal to the length L of the corner electrode. 1 At this time, by increasing the arc length to increase the length of the two ends of the corner electrode, the distance between the first spacing areas 130 adjacent to the two ends of the corner electrode is increased to reduce the superimposed current in the corner electrode when the current in the first spacing area 130 diffuses to the corner electrode, thereby effectively avoiding the electric field strength of the corner electrode from being too high and improving the balance of the electric field strength at the edge portion 800 of the electrochromic film 100.

[0107] Preferably, in some embodiments of the present application, the angle α of the arc-shaped corner electrode 110 is not less than 100°, that is, a corner electrode is formed by drawing an arc with a radius of N and an angle of 100°. When the length of the corner electrode 110 is constant, the electrode is set without affecting the edge of the entire film, and the color change speed of the electrochromic film 100 is not affected. That is, without changing the length of the corner electrode, by increasing the angle of the corner electrode 110, the distance between the two first spacing areas 130 adjacent to the corner electrode 110 is increased, thereby increasing the electric field superposition distance of the two first spacing areas 130 adjacent to the corner electrode 110 in the corner electrode 110, so as to reduce the superposition electric field strength of the electric field of the two adjacent first spacing areas 130 in the corner electrode 110. In addition, by increasing the angle of the corner electrode, the distance between the two sides of the corner electrode is increased, thereby also increasing the path of current conduction on both sides, thereby reducing the superposition effect of the current on both sides at the overlap, and further reducing the risk of failure of the corner of the electrochromic film 100.

[0108] like Figure 8 and Fig. 9 As shown, preferably, an improvement is made on the basis of any of the above embodiments, and a barrier portion is provided at the corresponding corner electrode, and the barrier portion extends along the extension direction of the corner electrode. The barrier portion blocks or reduces the current transmitted from the conductive layer of the barrier portion to the conductive layer of the central portion 300. Blocking or reducing the current in the embodiment of the present application means that the current will not be directly transmitted from the barrier portion to the conductive layer of the central portion 300, and reducing the current means that the current transmitted from the busbar through the barrier portion to the conductive layer of the central portion 300 is smaller than the current of the busbar. It should be noted that the shape of the partial area of ​​the edge portion 800 where the barrier portion is provided includes at least any one of a linear, planar, graphic, polygonal or imitation shape. The inventors found that the area where the electrochromic film 100 is prone to failure includes at least an area with low surface resistance. Since the surface resistance of this area is relatively low, when a current of a certain voltage is passed through the busbar, the current transmitted from the area with lower surface resistance to the central area is usually larger than the current in the area with higher surface resistance. Therefore, the conductive layer in the area with lower surface resistance will be in a high current environment for a long time, which will cause the conductive layer in this area to age on the one hand, and on the other hand, cause the electrochromic layer 170 in this area to be overcharged or over-discharged, thereby causing the area to fail earlier than other areas. By setting the blocking part corresponding to the area with lower surface resistance of the electrochromic film 100, such as the overlap of the busbar, the corner of the electrochromic film 100, and the part with smaller surface resistance of the conductive layer, the current transmitted from these areas to the central part 300 is blocked or reduced, so that the current in the area with lower surface resistance is close to the current in the area with higher surface resistance, thereby slowing down the speed of corner failure.

[0109] Preferably, based on any of the above embodiments, an improvement is made, wherein the barrier portion includes an etched area after etching a portion of the conductive layer and / or a filler having a resistance greater than that of the bus bar.

[0110] Preferably, based on any of the above embodiments, an improvement is made, the length of the first side of the corner electrode 110 is greater than the second side, and a blocking portion is provided on the second side of the corner electrode 110, and the blocking portion blocks or reduces the current of the bus bar 200 from being conducted from the second side of the corner electrode to the central part 300 of the electrochromic film 100, and the blocking portion at least penetrates the conductive layer of the edge portion 800 in contact with the bus bar, and is located on the side of the bus bar 200 close to the central part 300 of the electrochromic film 100. In the embodiment of the present application, a blocking portion is provided corresponding to the shorter side of the corner electrode, which effectively prevents the current of one side from being conducted to the corner area, and the other side of the corner electrode conducts current normally, and only one side conducts current, thereby reducing the current size in the corner area, thereby reducing the field strength in the area, and effectively preventing corner failure. At the same time, since the longer side can still conduct current normally, the corner area can also change color normally, thereby improving the color change speed of the electrochromic device, especially for large-area devices, which can significantly improve the color change speed of the electrochromic film 100.

[0111] Preferably, further improvements are made based on any of the above embodiments, such as Figure 8 , Fig. 9 as well as Fig.10 As shown, the edge corners of the electrochromic film 100 are provided with a barrier, and the barrier includes but is not limited to at least one of the following implementations: the barrier penetrates the first conductive layer 160 and the second conductive layer 180, the barrier penetrates part of the first conductive layer 160, the barrier penetrates part of the second conductive layer 180, the insulating or relatively high-resistance barrier is arranged between the second bus bar 220 and the first conductive layer 160, the insulating or relatively high-resistance barrier is arranged between the first bus bar 210 and the second conductive layer 180, and the relatively high-resistance barrier means that the resistance of the barrier is not less than the resistance of the bus bar. Among them, the insulating or relatively high-resistance barrier can be any one of insulating high-temperature glue, insulating glue, and a conductor with high resistance, or the first substrate layer 150 and / or the second substrate layer 190 can be used to block the bus bar from contacting the conductive layers, that is, no electrodes are arranged at the corners; the bus bar can be directly attached to the first substrate layer 150 and / or the second substrate layer 190 at the edge of the electrochromic film 100. The blocking portion blocks or reduces the current of the bus bar 200 from being conducted from the corner electrode 110 to the central portion 300 of the electrochromic film 100 . The blocking portion at least penetrates the conductive layer of the edge portion 800 in contact with the bus bar 200 and is located on a side of the bus bar 200 close to the central portion 300 .

[0112] When the electrochromic film 100 is an irregular film, such as a small corner area, the angle between the corner electrodes cannot be set too large, especially when the value range of α is 45°≤α≤90°, or even less than 45°, a blocking portion can be set to block the current there from being directly transmitted to the corner area, thereby reducing the possibility of failure due to the greater influence of the electric field in the corner area. Specifically, Figure 8 and Fig. 9As shown, the first corner electrode 111 and the second corner electrode 112 are respectively provided with a blocking portion. In the embodiment of the present application, the electrochromic film 100 includes four edges connected end to end in sequence, and the first corner electrode 111 and the second corner electrode 112 are respectively located at the corners formed by two adjacent edges, that is, a part of the corner electrode 110 is arranged at the end of one side of the film, and the other part is arranged at the end of the other adjacent side; a plurality of first straight edge electrodes 121 and second straight edge electrodes 122 are alternately arranged on each edge, and the number of the first straight edge electrodes 121 and the second straight edge electrodes 122 is set according to the length of each side of the electrochromic film 100 as required. If the length of each side of the electrochromic film 100 is shorter, the first straight edge electrode 121 and the second straight edge electrode 122 can also be arranged on one side respectively. Preferably, taking the first corner electrode 111 as an example, its two sides are the second straight edge electrode 122, the first straight edge electrode 121, the second straight edge electrode 122, the first straight edge electrode 121... and so on alternately. On the contrary, taking the second corner electrode 112 as an example, its two sides are the first straight electrode 121, the second straight electrode 122, the first straight electrode 121, the second straight electrode 122... and so on alternately. In the embodiment of the present application, when the first bus bar 210 is attached to one side of the electrochromic film 100 in the thickness direction, the first corner electrode 111 and the first straight electrode 121 are both electrically connected to the external power supply through the first bus bar 210; since a barrier portion is provided at the first corner electrode 111 in the embodiment of the present application, when the value range of α is 45°≤α≤90°, the two sides of the corner electrode are close to each other, and the two sides conduct current to the corner area, which has a greater impact, so a barrier portion is provided to block or reduce the current conducted from the first corner electrode 111 to the central part 300 of the electrochromic film 100, while no barrier portion is provided at the first straight electrode 121. The current is conducted from the first straight-edge electrode 121 to the central part 300 of the second conductive layer 180; at the beginning of power-on, the current at the first corner electrode 111 corresponding to the first conductive layer 160 of the electrochromic film 100 is smaller than the current at the straight-edge electrode or is 0, thereby reducing the electric field strength of the first corner electrode 111, and the electric field formed by the entire film will not be concentrated at the corner, but dispersed on the straight edge of the edge, so as to achieve a more balanced electric field strength in the corner part, edge part 800 and central part 300 of the electrochromic film 100, avoid the phenomenon of premature aging failure of the electrochromic film 100 at the corner, and improve the stability and durability of the electrochromic film 100. After power-on for a period of time, that is, after charging the preset amount of electricity, the current in the central part 300 of the first conductive layer 160 diffuses to the corners of the conductive layer, and finally reaches a balance, so that the entire electrochromic film 100 changes color evenly. Correspondingly, the barrier portion disposed on the second corner electrode 112 is consistent with the above-mentioned barrier portion disposed on the first corner electrode 111 , and will not be described in detail herein.Since the current is conducted from the busbar 200 to the edge portion 800 of the conductive layer to the central portion 300 of the conductive layer, the embodiment of the present application sets a barrier portion at the corner electrode 110 to block the current of the busbar 200 from being conducted from the edge portion 800 of the conductive layer to the central portion 300 of the conductive layer of the electrochromic film 100 through the barrier portion set at the corner of the edge portion 800, thereby reducing the current at the corner of the electrochromic film 100 and preventing the electrochromic layer 170 at the corner from being in a state of overcharge and over-discharge for a long time and causing premature failure; in addition, by reducing the current at the corner, the electric field strength at the corner is reduced to achieve a balanced electric field strength in the corner area and non-corner area of ​​the edge portion 800 of the electrochromic film 100, thereby preventing the entire electrochromic film 100 from aging failure at the corner or locally, and further improving the stability and durability of the electrochromic film 100.

[0113] Preferably, combined Figure 8 and Fig. 9 As shown, in some embodiments of the present application, the barrier portion includes a first barrier portion 600 and a second barrier portion 700. In the embodiment of the present application, the first corner electrode 111 is provided with the first barrier portion 600 correspondingly, and the second corner electrode 112 is provided with the second barrier portion 700 correspondingly, and the first barrier portion 600 and the second barrier portion 700 are both located on the side of the first bus bar 210 close to the central portion 300. By providing a barrier portion penetrating the corresponding conductive layer at each corner electrode 110, the structure is simpler, more compact and symmetrical, and the thickness of the diaphragm will not be locally too thick to affect the quality of the assembly, and the production process is simple, and it is only necessary to change the depth data of the first groove 400 or the second groove 500 of the corresponding corner when cutting the first groove 400 and the second groove 500, and when cutting the corresponding corner.

[0114] In some embodiments of the present application, the first barrier portion 600 corresponds to the first corner electrode 111 and at least penetrates the conductive layer in contact with the busbar along the thickness direction of the electrochromic film 100. The first corner electrode 111 penetrates the first substrate, the first conductive layer 160 and the electrochromic layer 170 through the first groove 400 to expose the second conductive layer 180. At this time, since the first groove 400 has been etched at the corner after the electrode is cut, it is only necessary to cut the barrier portion on the basis of the first groove 400. This arrangement ensures that the current can be effectively prevented from being conducted from the first barrier portion 600 to the conductive layer. In addition, the process of producing the film is simple, and the laser cutting process cost is low, which has the advantages of saving time and cost. In other preferred embodiments, the depth data of the first groove 400 at the corner can also be directly modified when cutting the first groove 400 at the corner, such as setting the first groove 400 at the corner to penetrate the first substrate, the first conductive layer 160, the electrochromic layer 170 and the second conductive layer 180. The first barrier portion 600 may be formed at any position between the edge of the first groove 400 and the bus bar; of course, in other embodiments, the first barrier portion 600 may also be arranged on one side of the groove close to the center, such as by infrared through the second substrate acting on the second conductive layer 180 at the corresponding position, or by laser cutting through the second substrate and the second conductive layer 180. The formation method of the corresponding second barrier portion 700 penetrating the corresponding second corner electrode 112 in the thickness direction of the electrochromic film 100 and at least penetrating the first conductive layer 160 may refer to any one of the above-mentioned methods for forming the first barrier portion 600, and will not be repeated here.

[0115] It is worth noting that the above-mentioned various features of the present application can be arbitrarily combined to form a new technical solution.

[0116] like Fig.16 As shown, some embodiments of the present application further provide a color-changing device, including a substrate layer 900 and an electrochromic film 100 as described in any of the above embodiments and stacked with the substrate layer 900.

[0117] Specifically, the substrate layer 900 is a transparent structure, for example, the substrate layer 900 can be transparent glass, a transparent acrylic plate or a transparent PVC plate, etc. Preferably, the substrate layer 900 is glass, and the substrate layer 900 is provided with two layers. The electrochromic film 100 can also be sandwiched between the two layers of the substrate layer 900, and an adhesive such as PVB or OCA is provided between the electrochromic film 100 and the substrate layer 900. At the peripheral edge of the electrochromic film 100, the edge of the electrochromic film 100 is sealed by a sealant, and the two layers of the substrate layer 900 are connected by a sealant to form a sealed color-changing device. The sealant is a transparent insulating colloid, and the sealant can be, for example, PVB (Polyvinyl Butyral) or OCA (Optically Clear Adhesive).

[0118] In addition, the sealant can not only form adhesion between the two substrate layers 900 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 with external moisture and oxygen, thereby increasing the service life of the electrochromic film 100 and the service life of the color-changing device.

[0119] In addition, a shielding layer 1000 is provided on the surface of the substrate layer 900 corresponding to the edge portion 800 of the electrochromic film 100. The shielding layer 1000 can be provided on the inner surface or the outer surface of the substrate layer 900; the shielding layer 1000 can be made of shielding materials such as metal and black ink. In order to prevent users from directly seeing the edge portion 800 of the electrochromic film 100 through the transparent substrate layer 900, the appearance of the entire film is more beautiful. Therefore, a shielding layer 1000 is provided at the edge of the substrate layer 900, and the bus bar 200 and the barrier portion at the edge of the electrochromic film 100 are shielded by the shielding layer 1000, thereby improving the aesthetics of the color-changing device. In addition, the width of the shielding layer 1000 is greater than the width of the edge portion 800. Generally speaking, the width of the shielding layer 1000 extends from the outer edge of the film to the central area to exceed the edge portion 800 of the film. The preferred shielding layer 1000 exceeds the corner electrode width by 10 mm to 20 mm. Due to the long-term use of the diaphragm, the edge portion 800 will fail earlier. The shielding layer 1000 is provided to cover the edge portion 800 of the diaphragm and also to shield the part that may fail, thereby preventing the user from directly observing the failed area and affecting the user's vision.

[0120] The embodiment of the present application also provides a vehicle, comprising the electrochromic film 100 as described in any one of the above items and a controller. The electrochromic film 100 can be applied to one of the laminated glasses of the vehicle's sunroof, side windows, front windshield, rear windshield and rearview mirror; the controller is connected to the electrochromic film 100 and to the vehicle's on-board control system. The controller is used to generate a control signal for controlling the electrochromic film 100 based on an environmental signal. Since this embodiment includes the electrochromic film 100 as described in any one of the above items, it has all the advantages of the above-mentioned electrochromic film 100.

[0121] 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.

[0122] 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.

[0123] Another embodiment of the present application provides a terminal product, including the electrochromic film 100 as described in any one of the above or the color changing device as described in the above, 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. The alternate vehicle can be any one of a car, a train, an airplane, etc. Since the terminal product adopts the electrochromic film 100, it has all the advantages of the electrochromic film 100.

[0124] 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: Including the edge part; The edge portion includes a corner portion and a straight edge portion, the corner portion is correspondingly provided with a corner electrode, the straight edge portion is provided with a straight edge electrode, and the straight edge electrode is spaced apart from the corner electrode; The electrochromic film also includes at least one of the following features: The length of the corner electrode is L1, and the average length of the straight edge electrode is L2, L2<L1; The corner electrode comprises a first side extending along a first direction and a second side extending along a second direction, and a value range of an angle α between the first side and the second side is: 45°≤α≤135°; The perimeter of the edge portion is D, the corner electrode is arc-shaped, and the radius of the corner electrode is N, wherein the value range of N is 1 / 9×D≤N.

2. The electrochromic film according to claim 1, characterized in that: The L1 and the L2 satisfy: L2<L1<4×L2.

3. The electrochromic film according to claim 2, characterized in that: The difference between L1 and L2 is greater than 20% L2.

4. The electrochromic film according to claim 1, characterized in that: The straight-line distance between the two ends of the corner electrode is L, wherein L and L2 satisfy: L2<L.

5. The electrochromic film according to claim 1, characterized in that: A first spacing region is provided between the corner electrode and the adjacent straight-edge electrode, and the length of the first spacing region is L3; A second spacing region is provided between adjacent straight-edge electrodes, and the length of the second spacing region is L4; Among them, L4≤L3.

6. The electrochromic film according to claim 1, characterized in that: The corner electrode is disposed to protrude toward the corner portion.

7. The electrochromic film according to claim 1, characterized in that: 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; a first groove and a second groove are provided at an edge portion of the electrochromic film; the electrochromic film is electrically connected to a bus bar, the bus bar comprises a first bus bar and a second bus bar, the corner electrode comprises a first corner electrode and a second corner electrode, and the straight-edge electrode comprises a first straight-edge electrode and a second straight-edge electrode; The first groove penetrates the first substrate layer, the first conductive layer and the electrochromic layer along the thickness direction of the electrochromic film to expose a portion of the second conductive layer to form the first corner electrode and the first straight-edge electrode, and the first corner electrode and the first straight-edge electrode are electrically connected to the first bus bar; The second groove penetrates the second substrate layer, the second conductive layer and the electrochromic layer along the thickness direction of the electrochromic film to expose a portion of the first conductive layer to form the second corner electrode and the second straight-edge electrode, and the second corner electrode and the second straight-edge electrode are electrically connected to the second bus bar.

8. The electrochromic film according to claim 1, characterized in that: The value range of α is 90°≤α≤135°.

9. The electrochromic film according to any one of claims 1 to 8, characterized in that: A blocking portion is provided corresponding to the corner electrode, and the blocking portion blocks or reduces the current of the bus bar from being conducted from the corner electrode to the central portion of the electrochromic film.

10. The electrochromic film according to claim 9, characterized in that: The blocking portion includes an etched area after etching a portion of the conductive layer and / or a filler having a resistance greater than that of the bus bar.

11. The electrochromic film according to any one of claims 1 to 8, characterized in that: The vertical distance from any point on the edge portion corresponding to two points of the first preset distance to the line segment formed by the two points is the second preset distance. When the second preset distance is less than or equal to n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is a straight edge portion. Or any point on the edge portion corresponding to two points at a first preset distance divides the edge portion between the two points into a first segment and a second segment, the line passing through the point tangent to the first segment is the first tangent, and the line passing through the point tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is greater than or equal to 135°, the edge portion corresponding to the two points is a straight edge portion.

12. The electrochromic film according to claim 11, characterized in that: The first preset distance has a value range of 30 mm to 300 mm.

13. The electrochromic film according to any one of claims 1 to 8, characterized in that: The vertical distance between two points of the first preset distance corresponding to any point on the edge portion to the line segment formed by the two points is the second preset distance. When the second preset distance is greater than n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is the corner portion; Or the corner portion includes a vertex and two ends connected on both sides; any point on the edge portion corresponds to two points at a first preset distance, and the edge portion between the two points is divided into a first segment and a second segment, and the line passing through the point and tangent to the first segment is the first tangent, and the line passing through the point and tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner portion.

14. The electrochromic film according to any one of claims 1 to 8, characterized in that: When the electrochromic film is charged and discharged, the maximum electric field intensity in the corner area corresponding to the corner electrode is E 3max , the minimum electric field strength of the edge part is E 4min ; Among them, E 3max <E 4min or E 3max and E 4min The difference between the 10% E 4min Up to 30% E 4min Inside.

15. 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 14 which is stacked with the substrate layer, wherein the substrate layer and the electrochromic film are stacked with each other.

16. A terminal product, characterized in that: An electrochromic film comprising any one of claims 1 to 14 or The color changing device according to claim 15, 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.

Images