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 a central part and an edge part adjacent to the central part, and the edge part is electrically connected with a bus bar; at least partial area of the edge part is provided with a blocking part, and conduction of current of the bus bar from the blocking part to the central part is blocked or reduced through the blocking part. The blocking part is correspondingly arranged in the partial area of the edge of the electrochromic membrane, and the current of the bus bar is blocked or reduced from being conducted to the central part of the electrochromic membrane from the blocking part through the blocking part, so that the current is prevented from being directly conducted to the conductive layer of the central part from the conductive layer provided with the blocking part; or the current conducted from the conducting layer provided with the blocking part to the conducting layer of the central part is reduced, so that the failure caused by over-charging or over-discharging in the corner area of the electrochromic diaphragm is avoided, the stability and the uniformity of the electric field intensity of the electrochromic diaphragm are improved, and the service life of the electrochromic diaphragm is prolonged.

Description

Technical Field

[0001] The present application relates to the field of electrochromic change, 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 set on the two substrates of the electrochromic film, and the electrochromic film is electrically connected to an external power source through the bus bars, so that a voltage is formed at both ends of the electrochromic material, causing the electrochromic material of the electrochromic film to change color in response to the change in the voltage at both ends.

[0003] Currently, during the use of electrochromic films, the color change end point corresponding to the corner area of ​​the film cannot reach the preset transmittance and fails prematurely. 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 solution: an electrochromic film, the electrochromic film comprising a central portion and an edge portion adjacent to the central portion, the edge portion being electrically connected to a bus bar;

[0006] At least a portion of the edge portion is provided with a blocking portion, and the blocking portion blocks or reduces the current of the bus bar from being conducted from the blocking portion to the central portion.

[0007] Furthermore, the blocking portion is arranged at a corner of the edge portion.

[0008] Furthermore, the corner includes a vertex and two ends connected by edges, dividing 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. When the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner; or the vertical distance from any point on the edge portion corresponding to the two points at a first preset distance to the line segment connecting the two points is the second preset distance. When the second preset distance is greater than n times the first preset distance, the range of n is 5% to 10%, and the edge portion corresponding to the two points is the corner.

[0009] Furthermore, the first preset distance has a value range of 30 mm to 300 mm.

[0010] Furthermore, the barrier portion includes an etching area formed by etching a portion of the conductive layer and / or a filler having a resistance greater than that of the bus bar.

[0011] Furthermore, the barrier portion at least penetrates the conductive layer of the edge portion in contact with the busbar and is located on the side of the busbar close to the center portion; and / or the barrier portion is arranged between the busbar and the conductive layer, and the resistance of the barrier portion is greater than the resistance of the busbar.

[0012] 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; the edge portion is provided with a first groove and a second groove, and the bus bar comprises a first bus bar and a second bus bar;

[0013] 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 a first electrode, and the first electrode is electrically connected to the first bus bar;

[0014] 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 a second electrode, and the second electrode is electrically connected to the second bus bar.

[0015] Further, the barrier portion arranged corresponding to the first electrode penetrates the second conductive layer, and / or the barrier portion arranged corresponding to the second electrode penetrates the first conductive layer.

[0016] Further, the barrier portion insulates and separates the first electrode from a central area of ​​the first conductive layer, and / or the barrier portion insulates and separates the second electrode from a central area of ​​the second conductive layer.

[0017] Further, the first electrode includes a first straight-edge electrode and a first corner electrode, the first corner electrode is located at the corner of the electrochromic film, the first corner electrode and the first straight-edge electrode are spaced apart at the edge portion, and the blocking portion is arranged corresponding to the first corner electrode; and / or the second electrode includes a second straight-edge electrode and a second corner electrode, the second corner electrode is located at the corner of the electrochromic film, the second corner electrode and the second straight-edge electrode are spaced apart at the edge portion, and the blocking portion is arranged corresponding to the second corner electrode.

[0018] Furthermore, the blocking portion at least penetrates the first conductive layer and the second conductive layer.

[0019] Furthermore, the barrier portion penetrates the first conductive layer, the electrochromic layer and the second conductive layer, and the barrier portion also penetrates the first substrate and / or the second substrate.

[0020] Furthermore, the total length of the blocking portion is less than the sum of the length of the first straight-side electrode and the length of the second straight-side electrode.

[0021] Further, the length of the blocking portion is not less than the length of the first corner electrode, and / or the length of the blocking portion is not less than the length of the second corner electrode.

[0022] Further, the blocking portion extends along at least one direction of the extension direction of the first corner electrode, and the blocking portion extends between the first corner electrode and the adjacent first straight-edge electrode; and / or the blocking portion extends along at least one direction of the extension direction of the second corner electrode, and the blocking portion extends between the second corner electrode and the adjacent second straight-edge electrode.

[0023] Furthermore, the barrier portion and the outer edge of the electrochromic film form a barrier region, the first corner electrode is located in the barrier region, and / or the second corner electrode is located in the barrier region.

[0024] Furthermore, the barrier portion is a linear structure, and the linear structure includes at least any one of a straight line, a broken line, a curve and an arc.

[0025] Furthermore, the blocking portion is a planar structure, and the planar structure includes at least any one of a polygonal shape, a sector shape, and a curved surface shape.

[0026] Furthermore, the distance between the barrier portion and the bus bar ranges from 0.3 mm to 20 mm.

[0027] Furthermore, the distance between the blocking portion and the bus bar is 1 mm.

[0028] Some embodiments of the present application provide a color-changing device, including a substrate layer and the electrochromic film stacked with the substrate layer.

[0029] Some embodiments of the present application provide a terminal product, comprising the electrochromic film or the color-changing device as described in any one of the above items, 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.

[0030] The embodiments of the present application have the following advantages: by providing a barrier portion corresponding to a partial area at the edge of the electrochromic film, the barrier portion blocks or reduces the current of the bus bar from being transmitted from the barrier portion to the central part of the electrochromic film, thereby preventing the current from being directly transmitted from the conductive layer provided with the barrier portion to the conductive layer in the central part, or reducing the current transmitted from the conductive layer provided with the barrier portion to the conductive layer in the central part, so as to avoid overcharging or over-discharging in a partial area in the edge part of the electrochromic film and causing premature failure, thereby improving the uniformity of the electric field strength of the electrochromic film, thereby improving the service life of the electrochromic film.

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

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

[0033] Figure 1 A schematic structural diagram of an embodiment of the electrochromic film in the present application is shown;

[0034] Figure 2 Shows Figure 1 Enlarged view of part A in the middle;

[0035] Figure 3 A schematic structural diagram of a first conductive layer of an embodiment of an electrochromic film in the present application is shown;

[0036] Figure 4 A schematic diagram showing the structure of the second conductive layer of an embodiment of the electrochromic film in the present application is shown;

[0037] Figure 5 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0038] Figure 6 Shows Figure 5 Enlarged view of the middle C part;

[0039] Figure 7 A structural schematic diagram showing another embodiment of the electrochromic film in the present application;

[0040] Figure 8 Shows Figure 7 Enlarged view of the middle D part;

[0041] Fig. 9 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0042] Fig.10 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0043] Fig.11 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0044] Fig.12 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0045] Fig.13 Shows Fig.12 A cross-sectional view of the middle BB section;

[0046] Fig.14 Shows Fig.12 Enlarged view of the middle E part;

[0047] Fig.15 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0048] Fig.16 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0049] Fig.17 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0050] Fig.18 A schematic structural diagram of another embodiment of the electrochromic film in the present application is shown;

[0051] Fig.19 Shows Fig.18 Enlarged view of part F in the middle.

[0052] Description of main component symbols:

[0053] 100-electrochromic film; 110-central part; 120-edge part; 130-first substrate layer; 140-first conductive layer; 150-electrochromic layer; 160-second conductive layer; 170-second substrate layer; 141-second electrode; 141a-second straight-edge electrode; 141b-second corner electrode; 161-first electrode; 161a-first straight-edge electrode; 161b-first corner electrode; 180-first groove; 181-first corner groove; 182-first straight-edge groove; 190-second groove; 191-second corner groove; 192-second straight-edge groove; 200-first barrier portion; 300-second barrier portion; 400-first bus bar; 500-second bus bar. 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.19 This application is described in detail.

[0060] The embodiment of the present application provides an electrochromic film that can change its color in response to changes in voltage, thereby adjusting the transmittance of the film. The film is mainly used in large-area devices such as windows, such as building curtain walls, car skylights, car side windows, and aircraft portholes, to play the role of dimming and shading.

[0061] Among them, see Figure 1 The electrochromic film 100 includes a central portion 110 and an edge portion 120 adjacent to the central portion 110, the edge portion 120 is connected to the central portion 110, and extends to the outside of the electrochromic film 100. At the same time, a bus bar is electrically connected to the edge portion 120, and the bus bar can be a conductive material such as copper foil, silver wire, conductive resin, etc. When the bus bar is electrically connected to an external power source, the bus bar conducts the current of the external power source to the conductive layer of the electrochromic film 100, so as to realize an electrical connection between the electrochromic film 100 and the external power source.

[0062] In the embodiment of the present application, the central portion 110 is the visible area of ​​the electrochromic film 100, and the edge portion 120 is the non-visible area of ​​the electrochromic film 100. By adjusting the transmittance of the visible area to adjust the transmittance of the film or adjusting the amount of light passing through the electrochromic film 100, the user can observe the scene on the other side of the film through the visible area. In addition, in some other embodiments of the present application, the central portion 110 is the color changing area in the electrochromic film 100, and the edge portion 120 is the non-color changing area of ​​the electrochromic film 100. For ease of understanding, please refer to the attached Figure 1 and attached Fig. 9 The edge portion 120 refers to the area formed between the dotted frame in the figure and the solid frame at the outer edge of the electrochromic film 100, and the central portion 110 of the electrochromic film 100 refers to the area surrounded by the dotted frame in the figure. Of course, the dotted lines in the figure do not limit the specific positions of the edge portion 120 and the central portion 110.

[0063] Combination Figure 1 and Figure 2As shown, in the embodiment of the present application, at least a portion of the edge portion 120 of the electrochromic film 100 is provided with a blocking portion to block or reduce the current from being conducted from the conductive layer of the blocking portion to the conductive layer of the central portion 110. In the embodiment of the present application, blocking the current means that the current will not be directly conducted from the blocking portion to the conductive layer of the central portion 110, and reducing the current means that the current conducted from the bus bar through the blocking portion to the conductive layer of the central portion 110 is smaller than the current of the bus bar. It should be noted that the shape of the portion of the edge portion 120 where the blocking portion is provided includes at least any one of a linear shape, a planar shape, a graphic shape, a polygonal shape or an imitation shape.

[0064] It is worth noting that the inventors have found that the areas where the electrochromic film 100 is prone to failure include at least areas with low surface resistance. Low surface resistance means that in the entire film, compared with two points or two areas, the area has a lower surface resistance. Since the surface resistance of this area is low, when a current of a certain voltage is passed through the bus bar, the current transmitted from the area with low surface resistance to the central area is usually larger than the current in the area with high surface resistance. Therefore, the conductive layer in the area with low surface resistance will be in a large 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 150 in this area to be overcharged or over-discharged, so that this area fails earlier than other areas. In addition, the area with low surface resistance includes at least one of the following situations: the part where the bus bar is overlapped, the corner of the electrochromic film 100, and the part with low surface resistance of the conductive layer. The resistance of the busbar is smaller than that of the conductive layer. When two busbars are overlapped, whether overlapping (equivalent to increasing the thickness of the busbar) or overlapping in parallel contact (equivalent to increasing the contact area between the busbar and the conductive layer), the number of busbars in the area corresponding to the overlap of the busbars is greater than that in the area where one busbar is set. Therefore, the surface resistance of the busbar overlap is usually smaller than that of the non-overlapping area. The busbars on the electrochromic film 100 are usually attached along the edge of the electrochromic film 100, corresponding to the corners of the electrochromic film. It can also be said that the busbars are bent at the corners and extend to both sides. Therefore, there are two busbars in the corner area, and there is only one busbar in the non-corner area. Therefore, the surface resistance of this area is smaller than that of other non-corner areas. The part with smaller surface resistance of the conductive layer can be that the material of the conductive layer at this place is different from that of other areas, or the thickness of the conductive layer at this place is greater than that of the conductive layer in other areas. Of course, on the same electrochromic film 100, there will be a variety of situations where the surface resistance is uneven. The embodiment of the present application is not limited to setting the barrier part on a certain solution, and it can be a combination of any area. Therefore, in the embodiment of the present application, the barrier part can be set corresponding to the area with lower surface resistance of the electrochromic film 100, such as at the overlap of the busbar, the corner of the electrochromic film 100, and any position of the conductive layer with lower surface resistance, so as to block or reduce the current transmitted from these areas to the central part 110, so that the current in the area with lower surface resistance is close to the current in the area with higher surface resistance, so as to slow down the speed of corner failure.

[0065] Preferably, further improvements are made based on the above embodiments, such as Figures 1 to 6As shown, the blocking portion is arranged at the corner of the edge portion 120; it should be noted that, in this embodiment, the electrochromic film 100 is a regular polygonal structure, the corner includes two ends connected to each other, and the angle between the two edges is less than 135°, and the corner refers to the angle formed by the ends of two adjacent edges in the edge portion 120 of the electrochromic film 100, that is, the corner of the edge portion 120. It is worth noting that the edge includes a straight edge and one of the edges that are less curved and are regarded as straight edges. Preferably, the angle between the two straight edges is less than 135°, then the corner is considered. Of course, in other embodiments, the shape of the electrochromic film 100 can be an irregular shape. For the irregular shape, there is a curved part on the edge, and the curved part corresponds to the corner of the film. In addition, it can be specified that the curvature of the edge portion 120 is greater than a preset value and is a corner, and the curvature is less than a preset value. The portion is considered to be a straight edge, to indicate that this portion can be approximately regarded as a straight edge.

[0066] In addition, the straight edge involved in the present application does not need to be a very standard straight line. In the preferred solution of the present application, the vertical distance from any point on the edge portion 120 corresponding to the 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 range of n is 5% to 10%, and the edge portion 120 corresponding to the two points is a straight edge. Or the edge portion 120 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. When the angle between the first tangent and the second tangent is greater than or equal to 135°, the edge portion 120 corresponding to the two points is a straight edge. Preferably, the value range of the first preset distance is 30 mm to 300 mm. Further preferably, 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 of the electrode corresponding to 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 of the electrode corresponding to two points with a distance of 10 cm and the line connecting the two points is less than 0.5 cm. For another example, the distance between the farthest point of the electrode corresponding to two points with a distance of 20 cm and the line connecting the two points is less than 1 cm, then the corresponding part of 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. The corner includes a vertex and an end connected to two edges, and the edge portion 120 between the two points is divided into a first segment and a second segment. The line tangent to the first segment through the point is the first tangent, and the line tangent to the second segment through the point is the second tangent. When the angle between the first tangent and the second tangent is less than 135°, the point is the vertex at the corner.

[0067] In a preferred embodiment, the vertical distance from any point on the edge portion 120 corresponding to two points at a first preset distance to a line segment connecting the two points is a second preset distance. When the second preset distance is greater than n times the first preset distance, and n ranges from 5% to 10%, the edge portion 120 corresponding to the two points is considered to be a corner, and the area formed by the edge portion 120 corresponding to the two points is a corner area, and the corresponding electrode is a corner electrode.

[0068] In a preferred embodiment of the present application, the two straight sides intersect to form the corner, and the angle between the two straight sides is less than 135°. The corner area is the area formed between the ends of the two straight sides, and the angle between the two straight sides is less than 135°; the length of the end of the straight side is set according to the size of the electrochromic device. Or the area between the edge portions 120 corresponding to the maximum distance between the connecting lines of the two end points is greater than the second preset distance is the corner area.

[0069] In the embodiment of the present application, a barrier portion is provided to reduce the current in the corner area, thereby reducing the electric field strength in the corner area, reducing the aging rate of the conductive layer in the corner, and also reducing the possibility of overcharging or over-discharging of the electrochromic layer 150 in the area, so as to achieve a balance in the electric field strength in the corner area and non-corner area of ​​the edge portion 120 of the electrochromic film 100, thereby avoiding the phenomenon of aging failure in the corners or parts of the entire electrochromic film 100, and improving the stability and durability of the electrochromic film 100.

[0070] Preferably, based on any of the above embodiments, an improvement is made, the busbar contacts the conductive layer at the corner of the diaphragm, and the angle formed by the two busbars at the corner is 45° to 135°; the busbar at the corner can be a special-shaped busbar, which is formed by stamping a piece of copper foil to imitate the corner, or two busbars are overlapped at the corner, or some corners use special-shaped busbars and some corners use two busbars overlapped. Since the busbars on the electrochromic diaphragm 100 are more concentrated at the corners, the surface resistance of the entire diaphragm corresponding to the corner is relatively small. At this time, the barrier portion is set at the corner to reduce the current there, and the current of the conductive layer corresponding to the corner area is balanced with the current of the conductive layer in the non-corner area, thereby avoiding the corner area from being overcharged or over-discharged for a long time and failing prematurely.

[0071] Preferably, based on any of the above embodiments, an improvement is made, and the edge portion 120 of the electrochromic film 100 includes at least a first edge, a second edge, and a third edge connected end to end in sequence, and in the embodiment of the present application, a fourth edge is also included. The edges are connected end to end to enclose the closed edge portion 120 of the electrochromic film 100. In other embodiments, according to the width of each edge of the film, each edge may be enclosed to form an open edge portion 120. The busbars include a first busbar 400 and a second busbar 500. The first busbar 400 is attached to the exposed first conductive layer 140 along each edge (such as the first edge). The first busbar 400 cannot be bent at the corner formed by the first edge and the second edge, so it is necessary to disconnect the first busbar 400 at the corner to form a first bus segment corresponding to the first edge, and after forming an overlap at the corner, extend and attach along another direction (the second edge), and disconnect at the corners of the second edge and the third edge to form a second bus segment corresponding to the second edge, and so on, and finally enclose to form a closed structure; the second busbar 500 is attached in the same way as the first busbar 400, and will not be described one by one here. Since each busbar needs to be overlapped, the thickness of the overlapped portion is greater than that of the non-overlapped portion, so the overlapped portion will affect the uneven force on each point on the edge of the diaphragm during the assembly process, resulting in assembly cracking. Therefore, grooves are set at the corners to form electrode areas, the thickness of the electrode areas is smaller than that of the non-electrode areas, the overlap is set in the electrode area, and the thicker part is set in the area with a smaller thickness, so that the thickness of the edge of the entire electrochromic film 100 is more uniform, reducing the uneven force on the edge of the electrochromic film 100 during the assembly process and causing cracks, thereby improving the life cycle of the entire device. The overlapping method is simpler than the stamping process and has a lower cost.

[0072] In addition, in this embodiment, the barrier part is set at the corner of the film. When the electrochromic film 100 is first charged and discharged, due to the setting of the barrier part, the color change of the area corresponding to the barrier part is often relatively slow. After charging for a period of time, the current diffuses through the conductive layer in the non-corner area to the conductive layer in the corner area, and finally achieves the color change balance of the entire surface. Also, because the corner is far away from the center, when the user observes, he often notices the center part 110 of the visible area at the first time, and it is often not easy to cause visual impact at the corner; therefore, the barrier part is set at the corner, and the area causing the color change speed to slow down is in the corner area, which will not cause visual errors and impacts to the user, thereby improving the user experience.

[0073] Preferably, improvements are made based on any of the above embodiments, such as Fig.10 and Fig.11As shown, the electrochromic film 100 includes a first substrate 130, a first conductive layer 140, an electrochromic layer 150, a second conductive layer 160 and a second substrate 170 which are stacked in sequence. The central portion 110 of the electrochromic film 100 is formed by stacking the central portions 110 of the first substrate 130, the first conductive layer 140, the electrochromic layer 150, the second conductive layer 160 and the second substrate 170; the first substrate 130 extends from its central portion 110 to the outside of the film to form an edge portion 120 of the first substrate 130, and the second substrate 170 extends from its central portion 110 to the outside of the film to form an edge portion 120 of the second substrate 170; the projections of the edge portions 120 of the first substrate 130 and the edge portions 120 of the second substrate 170 on the plane where the electrochromic layer 150 is located at least partially do not overlap; The first conductive layer 140 also extends from its central portion 110 to the outside of the film and is attached to the surface of the edge portion 120 of the first substrate layer 130 to form the edge portion 120 of the first conductive layer 140. The second conductive layer 160 also extends from its central portion 110 to the outside of the electrochromic film 100 and is attached to the surface of the edge portion 120 of the second substrate layer 170 to form the edge portion 120 of the second conductive layer 160. The edge portion 120 of the electrochromic film 100 includes the edge portion 120 of the first substrate layer 130, the edge portion 120 of the first conductive layer 140, the edge portion 120 of the second substrate layer 170, and the edge portion 120 of the first conductive layer 140. Specifically, as Fig.12 and Fig.13 As shown, the edge portion 120 of the first substrate 130 and the edge portion 120 of the second substrate 170 can extend in opposite directions, that is, relative to the plane where the electrochromic film 100 is located, the first substrate and the second 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 Fig.10 As shown, the edge portion 120 of the first substrate layer 130 and the edge portion 120 of the second substrate layer 170 can extend in the same direction. In the embodiment of the present application, it is preferred that the first substrate layer and the second substrate layer of each side are both extended outwardly of the electrochromic film 100 ( Fig.10 The first conductive layer 140 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 120 of the first substrate 130 and the edge portion 120 of the second substrate 170, and the second conductive layer 160 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 150.

[0074] In some embodiments of the present application, the first substrate layer 130 and the second substrate layer 170 are both transparent and flexible materials, such as PET (Polyethylene terephthalate), PC, etc., and the first conductive layer 140 and the second conductive layer 160 are both transparent conductive oxides, such as ITO (Indium Tin Oxide), IZO, etc. In this embodiment, ITO is attached to the first substrate layer 130 and the second substrate layer 170 by magnetron sputtering. The electrochromic layer 150 includes an electrochromic material layer, an electrolyte layer, and an ion conductive layer stacked in sequence. In other embodiments, the electrochromic layer 150 can also be a liquid crystal dimming layer, etc. By connecting the first conductive layer 140 and the second conductive layer 160 to an external power supply at the same time, an electric field can be formed between the first conductive layer 140 and the second conductive layer 160, so that the electrochromic layer 150 undergoes a stable and reversible color change under the action of the electric field.

[0075] Preferably, the embodiment of the present application is based on any of the above embodiments to further improve the barrier portion to include an etching area formed by etching a portion of the conductive layer and / or a filler having a resistance greater than that of the bus bar. In this embodiment, the barrier portion adopts laser etching of a portion of the conductive layer, and the partial conductive layer can be a partial conductive layer in the thickness direction, or a conductive layer that runs through a portion of the width of the entire conductive layer, or a combination of the two. In addition, the etching area can be a linear structure etched into a line, and the etching area can also be a planar structure in which a partial area is etched.

[0076] Preferably, the barrier portion penetrates the first conductive layer 140, the electrochromic layer 150 and the second conductive layer 160, and the barrier portion also penetrates the first substrate and / or the second substrate. The embodiment of the present application is further improved on the basis of any of the above embodiments, and the barrier portion includes but is not limited to at least one of the following implementations: the barrier portion penetrates the first conductive layer 140 and the second conductive layer 160, the barrier portion penetrates part of the first conductive layer 140, the barrier portion penetrates part of the second conductive layer 160, an insulating or relatively high-resistance barrier portion is arranged between the second bus bar 500 and the first conductive layer 140, an insulating or relatively high-resistance barrier portion is arranged between the first bus bar 400 and the second conductive layer 160, and a relatively high-resistance barrier portion means that the resistance of the barrier portion is not less than the resistance of the bus bar. Among them, the insulating or relatively high-resistance barrier part can be any one of insulating high-temperature glue, insulating glue, and a high-resistance conductor, or the first substrate layer 130 and / or the second substrate layer 170 can be used to block the contact between the bus bar and each conductive layer, that is, no electrodes are arranged at the corners; the bus bar can be directly attached to the first substrate layer 130 and / or the second substrate layer 170 at the edge of the electrochromic film 100.

[0077] Preferably, the embodiment of the present application is further improved on the basis of any of the above embodiments. When the first bus bar 400 and the second bus bar 500 are connected to an external power supply, the second bus bar 500 is connected to the central portion 110 of the first conductive layer 140 through the edge portion 120 of the first conductive layer 140, and conducts current to the central portion 110 of the first conductive layer 140, and / or the first bus bar 400 is connected to the central portion 110 of the second conductive layer 160 through the edge portion 120 of the second conductive layer 160, and conducts current to the central portion 110 of the second conductive layer 160, thereby forming a voltage at both ends of the electrochromic layer 150 to change the color of the electrochromic layer 150, thereby changing the transmittance of the visible area. In the embodiment of the present application, a blocking portion is provided. When the busbar is connected to an external power source, the current is conducted from the non-blocking area of ​​the edge portion 120 (i.e., the area without the blocking portion); the blocking portion blocks or reduces the current of the busbar from being conducted from the area with the blocking portion to the central portion 110 of the electrochromic film 100; therefore, when the electrochromic film 100 is energized, the current in the area of ​​the edge portion 120 of the electrochromic film 100 corresponding to the blocking portion is lower than the current in the non-blocking area (the area without the blocking portion). Therefore, a barrier portion can be set at a position where the electrochromic film 100 is more likely to fail, so that the corresponding current at this location is smaller than the current in the area where the current is easily increased in the prior art, thereby balancing the uniformity of the current of the entire film; thereby avoiding overcharging or over-discharging of the electrochromic layer 150 in this area during the charging and discharging process of the electrochromic film 100, thereby reducing the possibility of failure and improving the performance and service life of the electrochromic film 100.

[0078] Preferably, based on any of the above embodiments, further improvements are made, Figure 5 , Figure 7 and Fig.11 As shown, the edge portion 120 of the electrochromic film 100 is provided with a first groove 180 and a second groove 190 at intervals. The number of the first grooves 180 and the number of the second grooves 190 can be one, two or more than two arbitrary values, respectively, and can be specifically set according to actual conditions. In this embodiment, the first grooves 180 and the second grooves 190 are alternately provided on each side of the electrochromic film 100, and all the first grooves 180 and the second grooves 190 are alternately spaced and distributed in the circumference of the entire edge portion 120, and a spacing area is formed between adjacent first grooves 180 and second grooves 190.

[0079] The bus bar includes a first bus bar 400 and a second bus bar 500 , and the first bus bar 400 and the second bus bar 500 are respectively arranged on both sides of the electrochromic edge in the thickness direction.

[0080] Among them, combined Figure 7 and Fig.11 As shown, the first groove 180 penetrates the first substrate layer 130, the first conductive layer 140 and the electrochromic layer 150 along the thickness direction of the electrochromic film 100 to expose a portion of the second conductive layer 160 to form a first electrode 161, and the first electrode 161 is electrically connected to the first bus bar 400; in this embodiment, the area of ​​the second conductive layer 160 exposed by the first groove 180 and in contact with the external power source is the first electrode 161, which plays a role in conducting the external power source from the corner part of the second conductive layer 160 to the central part 110 of the second conductive layer 160 of the electrochromic film 100. It can be understood that the second conductive layer 160 exposed from the first groove 180 is the first electrode 161, and the external power source can be electrically connected to the first electrode 161 through the first bus bar 400, thereby electrically connecting the second conductive layer 160 to the external power source through the first bus bar 400.

[0081] In addition, combined Figure 5 and Fig.11 As shown, the second groove 190 penetrates the second substrate layer 170, the second conductive layer 160 and the electrochromic layer 150 along the thickness direction of the electrochromic film 100 to expose part of the first conductive layer 140 to form a second electrode 141, and the second electrode 141 is electrically connected to the second bus bar 500. In this embodiment, the area of ​​the first conductive layer 140 exposed by the second groove 190 and in contact with the external power source is the second electrode 141, which plays a role in conducting the external power source from the corner part of the first conductive layer 140 to the central part 110 of the first conductive layer 140 of the electrochromic film 100. It can be understood that the first conductive layer 140 exposed from the second groove 190 is the second electrode 141. The external power source can be electrically connected to the second electrode 141 through the second bus bar 500, so that the first conductive layer 140 is electrically connected to the external power source through the second bus bar 500.

[0082] In the present application embodiment, combined Figure 5 , Figure 7 and Fig.11As shown, by alternately arranging the first groove 180 and the second groove 190 at the edge of the electrochromic film 100, that is, forming the first electrode 161 and the second electrode 141 that are alternately arranged at intervals. The positive or negative electrode of the external power source is connected through the first electrode 161, and the negative or positive electrode of the external power source is connected through the second electrode 141, so that the electrochromic film 100 is electrically connected to the external power source. The first electrode 161 and the second electrode 141 are alternately arranged in the circumference of the edge portion 120, so that the external power source can be respectively conducted from multiple positions of the edge portion 120 of the conductive layer of the electrochromic film 100 to the central portion 110 of the conductive layer, and the current diffuses inward from the surroundings, 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 electrodes 161 and the second electrodes 141 are alternately arranged, the first electrodes 161 and the second electrodes 141 are prevented from short-circuiting, thereby improving the stability of the connection between the electrochromic film 100 and the external power supply and the color change speed of the electrochromic film 100. It is worth noting that the embodiment of the present application describes a preferred multi-electrode method.

[0083] In other embodiments, Fig.15 , Fig.16 As described above, two first grooves 180 can be provided, which are respectively located in the middle of two sides. As shown in the figure, the first grooves 180 are respectively provided at any two adjacent sides or two opposite sides, and the second grooves 190 can also be provided at two adjacent sides (such as Fig.15 shown) or opposite sides ( Fig.16 As shown). The two adjacent grooves are not connected to form a spacer. At this time, since the two adjacent grooves are not connected to form a spacer, the corresponding blocking portion is the spacer. The spacer does not contact the bus bar, and the bus bar will not conduct from the conductive layer at this location to the central portion 110 of the conductive layer, thereby protecting the corner area. In other embodiments, refer to Fig.17 The electrochromic edge shown can also be in the form of a single electrode, such as Fig.17 As shown, one first groove 180 is provided, and one second groove 190 is provided. The first groove 180 is located at two adjacent sides, and the second groove 190 runs through the other two adjacent sides, that is, the first substrate layer and the second substrate layer extend and expose in opposite directions, thereby forming the first electrode 161 and the second electrode 141. At this time, a blocking portion is provided in the corner area corresponding to the first electrode 161 and the second electrode 141, and in the corner area formed between the first electrode 161 and the second electrode 141, to block the current from being conducted from the corner to the inside of the film. It is worth noting that the blocking portion runs through the conductive layer in contact with the busbar, that is, at the position between the ends of the first electrode 161 and the second electrode 141, the blocking portion runs through the first conductive layer 140 on one side and the second conductive layer 160 on the other side.

[0084] Preferably, improvements are made based on any of the above embodiments, such as Figure 1 and Fig.11 As shown, a plurality of first grooves 180 and second grooves 190 are alternately arranged, the first electrode 161 includes a first straight-edge electrode 161a and a first corner electrode 161b, the first corner electrode 161b is located at the corner of the electrochromic film 100, and the first straight-edge electrode 161a is located at the straight edge of the electrochromic film 100, and the formation method thereof is consistent with the first electrode 161, the difference being that the first straight-edge electrode 161a and the first corner electrode 161b are respectively located at different positions; the first corner electrode 161b and the first straight-edge electrode 161a are spaced apart at the edge portion 120, and / or the second electrode 141 includes a second straight-edge electrode 141a and a second corner electrode 141b, the second corner electrode 141b is located at the corner of the electrochromic film 100, the second straight-edge electrode 141a is located at the straight edge of the electrochromic film 100, and the second corner electrode 141b and the second straight-edge electrode 141a are spaced apart at the edge portion 120. In this embodiment, the first electrode 161 includes a first straight electrode 161 a and a first corner electrode 161 b , and the second electrode 141 includes a second straight electrode 141 a and a second corner electrode 141 b .

[0085] Specifically, the barrier portion is provided corresponding to the first corner electrode 161b and / or the second corner electrode 141b. It can be understood that the barrier portion is provided corresponding to the first corner electrode 161b and / or the barrier portion is provided corresponding to the second corner electrode 141b.

[0086] When most electrochromic films 100 are applied to car windows and curtain walls, the edges of the corresponding electrochromic films 100 have edges, forming multiple corners; therefore, multiple bus bars need to be overlapped together, and multiple corner electrodes are required to set the overlap of the bus bars. Specifically, Figures 1 to 4As shown, the first corner electrode 161b and the second corner electrode 141b 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 161b and the second corner electrode 141b are respectively located at the corners formed by two adjacent edges, that is, a part of the corner electrode 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 161a and second straight edge electrodes 141a are alternately arranged on each edge, and the number of the first straight edge electrodes 161a and the second straight edge electrodes 141a is set according to the required length of each side of the electrochromic film 100. If the side length of the electrochromic film 100 is shorter, the first straight edge electrode 161a and the second straight edge electrode 141a can also be arranged on one side respectively. In a preferred embodiment, taking the first corner electrode 161b as an example, its two sides are sequentially the second straight-edge electrode 141a, the first straight-edge electrode 161a, the second straight-edge electrode 141a, the first straight-edge electrode 161a, etc., alternating in this manner. Conversely, taking the second corner electrode 141b as an example, its two sides are sequentially the first straight-edge electrode 161a, the second straight-edge electrode 141a, the first straight-edge electrode 161a, the second straight-edge electrode 141a, etc., alternating in this manner. In the embodiment of the present application, when the first bus bar 400 is attached to one side of the electrochromic film 100 in the thickness direction, the first bus bar 400 contacts and forms an electrical connection with the first corner electrode 161b and the first straight-side electrode 161a, and the external current is conducted to the first corner electrode 161b and the first straight-side electrode 161a through the first bus bar 400; since a blocking portion is provided at the first corner electrode 161b in the embodiment of the present application, the blocking portion blocks or reduces the current conducted from the first corner electrode 161b to the central portion 110 of the electrochromic film 100, while no blocking portion is provided at the first straight-side electrode 161a, and the current is conducted from the first straight-side electrode 161a to the central portion 110 of the second conductive layer 160. At the beginning of power-on, the current at the first corner electrode 161b corresponding to the first conductive layer 140 of the electrochromic film 100 is 0 or smaller than that of the first straight electrode 161a, thereby reducing the electric field strength of the first corner electrode 161b, and the electric field formed by the entire electrochromic film 100 will not be concentrated at the corner, but dispersed on the straight edge of the edge, so as to achieve the balance of the electric field strength of the corner part, the edge part 120 and the central part 110 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 use 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 110 of the first conductive layer 140 diffuses to the corner of the first conductive layer 140, and finally reaches a balance, so that the entire electrochromic film 100 changes color evenly.Correspondingly, the barrier portion provided on the second corner electrode 141b is consistent with the above-mentioned provision on the first corner electrode 161b, and will not be described in detail here. Since the first corner electrode 161b and the second corner electrode 141b are electrically connected to the external power supply through the bus bar, the current is conducted to the first corner electrode 161b and the second corner electrode 141b through the bus bar. During the process of the current conducted to both ends of the first corner electrode 161b diffusing toward the central portion 110, a superimposed current is formed in the angle region of the first corner electrode 161b, so that the current of the first corner electrode 161b is larger than the central portion 110 of the electrochromic film 100, resulting in an excessively high electric field intensity in the region corresponding to the first corner electrode 161b, causing the region corresponding to the first corner electrode 161b to age faster or even fail. The principle of the region corresponding to the second corner electrode 141b to age faster or even fail is the same as that of the first corner electrode 161b, and will not be described in detail here. Therefore, the embodiment of the present application sets a blocking portion at the first corner electrode 161b and the second corner electrode 141b, so that when the electrochromic film 100 forms an electrical connection with an external power source, the current conducted from the first corner electrode 161b and the second corner electrode 141b to the central portion 110 of the electrochromic film 100 is blocked or reduced by the blocking portion. Therefore, the current in the area corresponding to the first corner electrode 161b and the second corner electrode 141b is lower than the current in the area of ​​the electrochromic film 100 where the blocking portion is not set, so that the electrochromic layer 150 corresponding to the first corner electrode 161b and the second corner electrode 141b will not be overcharged or over-discharged, and the possibility of failure is reduced, thereby improving the performance and service life of the electrochromic film 100.

[0087] Preferably, based on any of the above embodiments, further improvements are made, Figure 3 and Figure 4 As shown, the blocking portion includes a first blocking portion 200 and / or a second blocking portion 300. It can be understood that the blocking portion includes the first blocking portion 200 or the second blocking portion 300. Or the blocking portion includes the first blocking portion 200 and the second blocking portion 300. In the embodiment of the present application, the first corner electrode 161b is provided with the first blocking portion 200 correspondingly, and the second corner electrode 141b is provided with the second blocking portion 300 correspondingly, and the first blocking portion 200 and the second blocking portion 300 are both located on the side of the first bus bar 400 close to the central portion 110. By providing a blocking portion penetrating the corresponding conductive layer at each corner electrode, 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 180 or the second groove 190 at the corresponding corner when cutting the first groove 180 and the second groove 190.

[0088] Preferably, combined Figure 3 and Figure 4 As shown, based on any of the above embodiments, the barrier portion at least penetrates the conductive layer of the edge portion 120 in contact with the bus bar. The penetration method may be laser etching of the corresponding conductive layer, or etching the ITO of the corresponding portion into an insulating material by infrared laser. In this embodiment, the barrier portion penetrates the conductive layer in contact with the bus bar in any of the following ways: from the base layer to the conductive layer attached to the base layer, or from the base layer to the electrochromic layer 150; or from the first conductive layer 140 to the second conductive layer 160. Specifically, as Figure 4 and Fig.12 As shown, in some embodiments of the present application, the first barrier portion 200 corresponds to the first corner electrode 161b and penetrates at least the conductive layer in contact with the busbar in the thickness direction of the electrochromic film 100. The first corner electrode 161b is formed by the first groove 180 penetrating the first substrate, the first conductive layer 140 and the electrochromic layer 150 and then exposing the second conductive layer 160. Specifically, as shown in FIG. Figure 3 and Figure 4As shown, the first groove 180 corresponding to the first corner electrode 161b is defined as the first corner groove 181, and the first groove 180 corresponding to the first straight electrode 161a is defined as the first straight groove 182. Similarly, the second groove 190 corresponding to the second corner electrode 141b is defined as the second corner groove 191, and the second groove 190 corresponding to the second straight electrode 141a is defined as the second straight groove 192. At this time, since the first groove 180 has been etched at the corner after the electrode is cut, it is only necessary to cut the barrier part on the basis of the first groove 180. In addition to ensuring that the current can be effectively prevented from being conducted from the first barrier part 200 to the conductive layer at the corner, and effectively preventing the corner from failing prematurely, the process of producing the diaphragm 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 180 at the corner can also be directly modified when cutting the first groove 180 at the corner, such as setting the first groove 180 at the corner to penetrate the first substrate, the first conductive layer 140, the electrochromic layer 150 and the second conductive layer 160. The formation of the above-mentioned first barrier 200 can be formed at any position between the edge of the first groove 180 and the bus bar; of course, in other embodiments, the first barrier 200 can also be set on one side of the groove close to the center position, such as through the second substrate through infrared acting on the second conductive layer 160 at the corresponding position, or through the second substrate and the second conductive layer 160 by laser cutting. The formation method of the corresponding second barrier 300 penetrating the corresponding second corner electrode 141b in the thickness direction of the electrochromic film 100 at least penetrating the first conductive layer 140 can refer to any one of the above-mentioned methods for forming the first barrier 200, and will not be repeated here.

[0089] Preferably, based on any of the above embodiments, further improvements are made, Figure 1 and Figure 2 , Figure 7 and Figure 8 The barrier portion at least penetrates the first conductive layer 140 and the second conductive layer 160. The first barrier portion 200 at least penetrates the first conductive layer 140 and the second conductive layer 160 in the thickness direction of the electrochromic film 100. Specifically, as Figure 7As shown, the first barrier portion 200 can be cut through at least one of the substrate layers to another substrate layer by laser cutting, or it can be cut through from one side of the electrochromic film 100 to the other side; since the first barrier portion 200 passes through two conductive layers, passing through the second conductive layer 160 that is in direct contact with the bus bar can effectively prevent the edge portion 120 of the second conductive layer 160 from conducting current to the center portion 110, thereby effectively preventing corner failure; in addition, since the first barrier portion 200 also passes through the first conductive layer 140, it prevents the side of the first bus bar 400 from contacting the side of the first groove 180, and contacts the side of the first conductive layer 140 corresponding to the first groove 180 to conduct, thereby effectively preventing the first bus bar 400 from conducting current to the center portion 110 of the first conductive layer 140 and causing a short circuit, thereby causing film failure, and further improving the service life of the film. Preferably, as Figure 1 and Figure 2 As shown, the first barrier portion 200 runs from one side of the electrochromic film 100 in the thickness direction to the other side. After the busbar is attached to the entire film, the position of the electrochromic film 100 corresponding to the corner can be laser etched to form a groove by laser. The original process does not need to be changed, and only needs to be improved on the basis of the original film. There is no need to change the original process route, so the cost of process design is saved, and the structure and process are simple. The barrier portion extends along the adjacent two sides and is parallel to the busbar, that is, the two ends of the first groove 180 are not etched, and the first corner electrode 161b can be connected to other parts, and the side edges of the two ends of the first corner electrode 161b are also connected to the entire second conductive layer 160, which plays a role in supporting the busbar and conducting.

[0090] Preferably, further improvements are made based on any of the above embodiments, such as Figure 7 and Fig.11 As shown, the second blocking portion 300 at least penetrates the first conductive layer 140 and the second conductive layer 160 in the thickness direction of the electrochromic film 100. It should be noted that the cutting method of the second blocking portion 300 can refer to the cutting method of the first blocking portion 200, and the blocking principle of the current and electric field of the second corner electrode 141b is consistent with that of the first blocking portion 200, which will not be repeated here. Preferably, the blocking portion penetrates the electrochromic film 100 along the thickness direction of the electrochromic film 100.

[0091] Preferably, based on any of the above embodiments, further improvements are made, Fig.12 and Fig.14As shown, the distance between the barrier and the bus bar ranges from 0.3 mm to 20 mm, and a sufficient distance is reserved between the barrier and the bus bar to allow the bus bar to have a bonding space, so as to avoid the bus bar being too wide and crossing the barrier to be attached to the side of the conductive layer close to the center portion 110, thereby failing to effectively prevent the bus bar from being conducted from the corner to the center. Fig.12 and Fig.14 As shown, there is a gap between the first bus bar 400 and the first barrier portion 200, and / or there is a gap L between the second bus bar 500 and the second barrier portion 300. Preferably, the distance between the first barrier portion 200 and the first groove 180 is 0.3 mm to 10 mm; preferably 1 mm. The specific value can be adjusted according to the size of the electrochromic film 100; combined with Figure 2 , Figure 7 As shown, the first barrier portion 200 is 1 mm away from the edge of the first groove 180; in order to ensure that the distance between the first barrier portion 200 and the first groove 180 does not affect the range of the visible area, and can also effectively isolate the current from being conducted from the barrier portion to the central part, it is necessary to set the distance within a reasonable range. If the distance between the first barrier portion 200 and the first groove 180 is too large, it will affect the visible area of ​​the entire diaphragm. If the distance between the first barrier portion 200 and the first groove 180 is too small, the first conductive layer 140 will be squeezed and directly contact the first bus bar 400 when the film is assembled, and it will not be able to effectively isolate the conduction of current. It is worth noting that when the first barrier portion 200 is set in the first groove 180, the distance between the first barrier portion 200 and the first groove 180 must meet the above-mentioned range of 1-10 mm between the first barrier portion 200 and the first bus bar 400. In addition, the distance between the second barrier portion 300 and the second bus bar 500 is also within the above range. The principle and formation method thereof are the same as those of the first barrier portion 200 , and will not be described in detail herein.

[0092] Preferably, combined Figure 5 , Figure 6 as well as Figure 7 and Figure 8As shown, further improvements are made on the basis of any of the above embodiments, regardless of whether the barrier portion penetrates a single conductive layer or two conductive layers; the barrier portion is a linear structure, and the linear structure includes at least one of a straight line, a broken line, a curve and an arc line, and the shape of the barrier portion is adapted to the shape of the first groove 180 or the second groove 190. The linear barrier portion can be an etched line etched by laser. In the embodiment of the present application, the barrier portion at least penetrates the portion of the conductive layer in contact with the bus bar. When the bus bar transmits current to the edge portion 120 of the conductive layer, the current of the bus bar is prevented from being transmitted to the center portion 110 of the conductive layer due to the presence of the barrier portion. The barrier portion is set as a linear structure, which is simple in structure and will not be abrupt. In addition, the shape of the barrier portion can be set according to the shape of the edge of the electrochromic film 100 to make it more coordinated with the film.

[0093] Preferably, based on any of the above embodiments, the barrier portion and the outer edge of the electrochromic film 100 form a barrier region, the first corner electrode 161b is located in the barrier region, and / or the second corner electrode 141b is located in the barrier region. Figure 5 and Figure 6 As shown, the barrier portion is parallel to the edge of the bus bar, and the shape of the barrier portion matches the shape of the groove; the first barrier portion 200 and / or the second barrier portion 300 is a "W"-shaped structure, for example, Figure 6 As shown, the second blocking portion 300 includes a first portion and a second portion extending along the extension direction of the second corner electrode 141b, and one end of the first portion and the second portion are connected; the other ends of the first portion and the second portion extend to between the second corner electrode 141b and the second straight-edge electrode 141a; the second blocking portion 300 also includes a third portion and a fourth portion, and the third portion and the fourth portion are respectively arranged corresponding to the two ends of the second corner electrode 141b, one end of the third portion extends to intersect with the outer edge of the electrochromic film 100, and the other end extends to intersect with the first portion, one end of the fourth portion extends to intersect with the outer edge of the electrochromic film 100, and the other end extends to intersect with the second portion. In other embodiments, the third portion and the fourth portion do not intersect with the outer edge of the electrochromic film 100, as long as the current conducted by the second corner electrode 141b can be effectively isolated. The second blocking portion 300 and the outer edge of the electrochromic film 100 are enclosed to form a blocking region that is independent of the central portion 110 of the first conductive layer 140 and insulated from the middle portion of the first conductive layer 140, and the second corner electrode 141b is located in the blocking region. In this embodiment, since the second corner electrode 141b is completely enclosed by the blocking region, the current conducted by the second corner electrode 141b is limited to the blocking region, thereby reducing the field intensity effect on the corner region and causing failure. In this embodiment, the structure of the first blocking portion 200 is consistent with the structure of the second blocking portion 300, and will not be repeated here.

[0094] Preferably, based on any of the above embodiments, as a further improvement, the barrier portion insulates and separates the first electrode 161 from the central area of ​​the first conductive layer 140 , and / or the barrier portion insulates and separates the second electrode 141 from the central area of ​​the second conductive layer 160 .

[0095] Preferably, based on any of the above embodiments, the barrier portion extends along at least one direction of the extension direction of the first corner electrode 161b, and the barrier portion extends between the first corner electrode 161b and the adjacent first straight-edge electrode 161a; and / or the barrier portion extends along at least one direction of the extension direction of the second corner electrode 141b, and the barrier portion extends between the second corner electrode 141b and the adjacent second straight-edge electrode 141a. Please refer to Figure 2 and Figure 7 As shown, the first barrier part 200 is a zigzag structure. Specifically, the first barrier part 200 and / or the second barrier part 300 is an "L"-shaped structure. The barrier part extends along two adjacent sides and is parallel to the bus bar. That is to say, the two ends of the second conductive layer 160 corresponding to the first groove 180 are not etched, and the first corner electrode 161b can be connected to other parts, and the side edges of the two ends of the first corner electrode 161b are also connected to the entire second conductive layer 160, playing the role of supporting the bus bar and conducting. Preferably, a spacing area is formed between the corner electrode and the straight-edge electrode, and the two ends of the barrier part extend to correspond to the spacing area, further reducing the current from the spacing area to the central area of ​​the conductive layer, and further reducing the possibility of corner failure.

[0096] Preferably, further improvements are made on the basis of any of the above embodiments. Specifically, both ends of the "L"-shaped first barrier portion 200 extend toward the outer edge of the diaphragm respectively, and a first isolation area is formed by surrounding the edges of the corners of the first barrier portion 200 and the electrochromic film 100. The first corner electrode 161b is isolated from the conductive layer inside the electrochromic film 100 by the isolation area, that is, the current transmitted to the first barrier portion 200 cannot be transmitted to the inside of the electrochromic film 100. Therefore, not only can the corner failure of the electrochromic film 100 be prevented, but also the short circuit of the film can be effectively prevented.

[0097] In addition, if Figure 5 and Figure 6 As shown, the principle of the shape setting of the second blocking portion 300 at the second corner electrode 141 b is consistent with that of the first blocking portion 200 , and will not be described in detail here.

[0098] Preferably, further improvements are made based on any of the above embodiments, such as Fig.18 and Fig.19As shown, the first barrier portion 200 extends a straight line along one of the sides, and / or the second barrier portion 300 extends a straight line along one of the sides. In other words, the first corner electrode 161b includes a first section and a second section, and the first barrier portion 200 extends along the first section or the second section. Exemplarily, the first barrier portion 200 extends in the direction in which the first section extends; at this time, the effective electric field formed by the current at the corner current is the end of the second section where the first barrier portion 200 is not provided to diffuse toward the direction of the first section. Since the first barrier portion 200 is provided in the first section, the corresponding first section will not form an electric field and will be superimposed with the electric field formed by the second section to cause the diaphragm to fail. With such a configuration, while effectively preventing the failure of the diaphragm corners, it is ensured that the color change speed will not affect the user experience.

[0099] Preferably, based on any of the above embodiments, the total length of the barrier portion is further improved to be less than the sum of the length of the first straight-edge electrode 161a and the length of the second straight-edge electrode 141a. The length of the barrier portion will affect the conduction speed of the current from the busbar to the center of the conductive layer, thereby affecting the color change speed of the electrochromic film 100. Therefore, the total length of the barrier portion is less than the sum of the total lengths of the straight-edge electrodes to ensure that the electrochromic film 100 is effectively prevented from failing, improve the electrochromic film 100, and ensure that the electrochromic film 100 has a sufficient current conduction area after power-on so that the electrochromic film 100 can change color quickly, especially for large-area devices, the speed of its electrochromic change directly affects the user's visual experience, thereby ensuring the user experience.

[0100] Preferably, based on any of the above embodiments, the ratio of the total length of the barrier portion to the sum of the length of the first straight-edge electrode 161a and the length of the second straight-edge electrode 141a is in the range of 1:20 to 1:2; specifically, the size of the ratio can be set according to the size of the electrochromic film 100, and the shape of the barrier portion can also be set according to the shape of the electrochromic film 100. Preferably, the length of each group of barrier portions is the same, and the total length of the barrier portion accounts for 1 / 10 of the sum of the lengths of each side. If the length of the barrier portion is too short, and the position with a larger field strength formed by the bus bars on the two adjacent sides of the electrochromic film 100 covers a larger position, the too short barrier portion cannot effectively block the current and forms an excessively large local current, thereby failing to effectively prevent the electrochromic film 100 from failing prematurely. If the barrier portion is too long, the color change speed of the electrochromic film 100 is affected.

[0101] Preferably, based on any of the above embodiments, the length of the barrier portion is not less than the length of the first straight-edge electrode 161a and / or the length of the second straight-edge electrode 141a. Preferably, the distance between the two ends of the barrier portion is not less than the length of the first straight-edge electrode 161a, and / or the distance between the two ends of the barrier portion is not less than the length of the second straight-edge electrode 141a. Preferably, the length of the first corner electrode 161b is not less than the length of the first straight-edge electrode 161a, and the length of the second corner electrode 141b is not less than the length of the second straight-edge electrode 141a. It is understandable that the length of the corner electrode is equal to the length of the straight-edge electrode, or the length of the corner electrode is greater than the length of the straight-edge electrode.

[0102] Exemplarily, the length of the first corner electrode 161b is equal to that of the first straight electrode 161a, and is equal to that of the second corner electrode 141b and the second straight electrode 141a; the length of the first blocking portion 200 is not less than that of the first corner electrode 161b, and the length of the second blocking portion 300 is not less than that of the second corner electrode 141b. That is, the first blocking portion 200 is parallel to the first corner electrode 161b, and both ends extend beyond the ends of the first corner electrode 161b; wherein the length of the first blocking portion 200 refers to the total length of the linear path of the first blocking portion 200, and the length of the second blocking portion 300 refers to the total length of the linear path of the second blocking portion 300. In addition, the length of the first corner electrode 161b refers to: the length of the first corner electrode 161b along the corner path of the electrochromic film 100, and the length of the second corner electrode 141b refers to the length of the second corner electrode 141b along the corner path of the electrochromic film 100. The first barrier is extended beyond the first corner electrode 161b, and the entire length direction of the first corner electrode 161b is completely covered. The current conducted by the busbar can only be conducted from the two ends of the first corner electrode 161b, and cannot be conducted from the side to the central part 110 of the film, thereby effectively blocking the current conducted by the first corner electrode 161b, and further effectively preventing the electrochromic film 100 from failing prematurely. By increasing the length of the first barrier portion 200 and the second barrier portion 300, the barrier quality of the first barrier portion 200 to the current in the first corner electrode 161b and the barrier quality of the second barrier portion 300 to the current in the second corner electrode 141b are improved.

[0103] Specifically, the embodiment of the present application increases the length of the first barrier portion 200 to increase the distance between the two ends of the first barrier portion 200, thereby increasing the path for the current to be conducted from the first corner electrode 161b to the central portion 110 of the electrochromic film 100, thereby reducing the current of the first corner electrode 161b, thereby effectively preventing corner failure.

[0104] In this embodiment, the principle of increasing the length of the second blocking portion 300 is the same as that of the first blocking portion 200, and will not be described in detail herein.

[0105] Preferably, further improvements are made based on any of the above embodiments, such as Fig. 9 The barrier portion is a planar structure, and the planar structure includes at least one of a polygon, a sector and an arc. In addition, the shape of the barrier portion can also be set to a shape similar to the shape of the corner according to the shape of the corner of the electrochromic film 100, and the shape of the barrier portion can also be contoured according to the edge of the visible area corresponding to the window. Setting the barrier portion as a planar structure increases the area of ​​the barrier portion, further ensuring that the conduction of current can be effectively blocked. On the other hand, the conductive layer corresponding to the corners that are prone to failure is removed to avoid long-term use. Some corner areas will still fail due to overcharging and over-discharging of the current, thereby accelerating the failure of other areas; further effectively preventing the film from failing prematurely and increasing the service life of the film. It can be understood that the area corresponding to the barrier portion of the planar structure on the electrochromic film 100 is the non-visible area. From Fig. 9 As can be seen from the figure, the interior of the hexagon surrounded by the dotted line is the visible area of ​​the electrochromic film 100 , and the area outside the dotted line of the hexagon is the non-visible area of ​​the electrochromic film 100 .

[0106] Among them, the blocking portion is arranged on a side of the first corner electrode 161b and / or the second corner electrode 141b away from the edge of the electrochromic film 100, and the blocking portion at least penetrates the first conductive layer 140 and / or the second conductive layer 160. Preferably, the blocking portion penetrates the conductive layer in contact with the corresponding bus bar, which is equivalent to only cutting a single layer of the conductive layer. In the process of preparing the electrochromic film 100, when making the conductive layer, the conductive layer of a certain area can be directly removed, or an infrared laser can be used to penetrate the base layer and act on the conductive layer. The process is simple and the effect is better.

[0107] Specifically, the blocking portion is arranged on a side of the first corner electrode 161b away from the edge of the electrochromic film 100, and the blocking portion at least penetrates the first conductive layer 140 and the second conductive layer 160. It should be noted that, in this embodiment, the first conductive layer 140 and / or the second conductive layer 160 in the area formed by the connection line between the first corner electrode 161b and the two ends of the first corner electrode 161b are removed to form a hollow area (i.e., the first blocking portion 200) in the conductive layer corresponding to the first corner electrode 161b, and the shape of the hollow area is a triangle, an arc or a fan. It can be understood that the first corner electrode 161b is separated from the central part 110 by the hollow area (the first blocking portion 200), that is, no current passes through the first corner electrode 161b, which is equivalent to the first corner electrode 161b having an infinite resistance, so as to achieve field intensity balance at the corner and non-corner of the edge of the electrochromic film 100, and improve the overall performance of the electrochromic film 100.

[0108] In addition, in some embodiments of the present application, the barrier portion is disposed on a side of the second corner electrode 141b away from the edge of the electrochromic film 100, and the barrier portion at least penetrates the first conductive layer 140 and the second conductive layer 160. It should be noted that the principle of disposing the barrier portion on the second corner electrode 141b is consistent with the principle of disposing the barrier portion on the first corner electrode 161b, and will not be described in detail here.

[0109] Preferably, the barrier portion includes a filler having a resistance greater than that of the bus bar; further improved on the basis of any of the above embodiments, the resistance of the first corner electrode 161b is greater than that of the first straight-edge electrode 161a. It can be understood that, due to the greater resistance of the first corner electrode 161b, the current transmitted to the first corner electrode 161b is less than the current transmitted to the first straight-edge electrode 161a. Since the smaller the current, the smaller the electric field strength formed around it, that is, the electric field strength of the first corner electrode 161b is less than the electric field strength of the first straight-edge electrode 161a, since the field strengths at both ends of the first corner electrode 161b are superimposed in the area enclosed by the first corner electrode 161b, the electric field strength at the first corner electrode 161b can be kept substantially equal to the electric field strength of the first straight-edge electrode 161a, thereby achieving the effect of balancing the electric field.

[0110] And / or, the resistance of the second corner electrode 141b is greater than the resistance of the second straight-edge electrode 141a, and the second corner electrode 141b and the first corner electrode 161b block the current to prevent corner failure in the same principle, which will not be described in detail. The first corner electrode 161b and the second corner electrode 141b can be made of a conductive material with a greater resistance than the straight-edge electrode, and finally overlap with the straight-edge electrode to form a ring conduction.

[0111] Preferably, further improvement is made on the basis of any of the above embodiments, by increasing the resistance of the first corner electrode 161b, including increasing the resistance of the first bus bar 400 electrically connected to the first corner electrode 161b, that is, reducing the thickness of the first bus bar 400 corresponding to the first corner electrode 161b, thereby reducing the current conducted to the first corner electrode 161b.

[0112] Preferably, based on any of the above embodiments, the method of increasing the resistance of the first corner electrode 161b includes connecting a resistor in series with a bus bar between the first corner electrode 161b and the first straight electrode 161a, and arranging a lead-out structure of the bus bar at the first straight electrode 161a, so as to electrically connect the bus bar to an external power source through the lead-out structure. It can be understood that by connecting a resistor in series, when the lead-out structure is electrically connected to an external power source, the resistance value of the resistor electrically connected to the first corner electrode 161b is increased, thereby reducing the current conducted to the first corner electrode 161b.

[0113] Preferably, based on any of the above embodiments, the method of increasing the resistance of the first corner electrode 161b includes reducing the thickness of the second conductive layer 160 corresponding to the first straight electrode 161a. It can be understood that since the thickness of the second conductive layer 160 corresponding to the first straight electrode 161a is reduced, the resistance of the first straight electrode 161a is increased, and therefore, the current transmitted to the first straight electrode 161a is reduced, that is, the electric field strength of the first straight electrode 161a is reduced, thereby reducing the current and electric field strength transmitted to the first corner electrode 161b. In this embodiment, since the thickness of the bus bar at one end electrically connected to the first corner electrode 161b is reduced, the resistance of the bus bar electrically connected to the first corner electrode 161b is increased, thereby reducing the current transmitted to the first corner electrode 161b through the bus bar, that is, reducing the electric field strength formed in the film by the first corner electrode 161b.

[0114] In addition, the method of enlarging the second corner electrode 141 b is the same as the method of enlarging the first corner electrode 161 b , which will not be described in detail herein.

[0115] Preferably, based on any of the above embodiments, the barrier is provided between the bus bar and the conductive layer, and the resistance of the barrier is greater than the resistance of the bus bar. Preferably, the barrier covers the projection of the conductive layer on the plane where the electrochromic element is located, or the barrier covers the exposed conductive layer, that is, the corresponding electrode. For example, the barrier covers the first corner electrode 161b and / or the second corner electrode 141b at the corner. Fig.10As shown, in some embodiments of the present application, the first barrier part 200 is disposed between the bus bar and the first corner electrode 161b, and the barrier part can be an insulating high temperature glue, an insulating glue, or other materials with relatively high resistance. That is, the first barrier part 200 is disposed between the first bus bar 400 and the first corner electrode 161b, and the first barrier part 200 is used to separate the first bus bar 400 from the first corner electrode 161b, so as to avoid direct contact between the bus bar and the first corner electrode 161b, so as to form a blocking or reducing effect on the current of the first bus bar 400 being conducted to the first corner electrode 161b through the first barrier part 200, thereby reducing the magnitude of the current conducted to the first corner electrode 161b, and reducing the electric field strength of the conductive layer corresponding to the first corner electrode 161b.

[0116] And / or the second barrier portion 300 is arranged between the bus bar and the second corner electrode 141b, that is, the second barrier portion 300 is provided between the second bus bar 500 and the second corner electrode 141b, and the second bus bar 500 is separated from the second corner electrode 141b by the second barrier portion 300 to avoid direct contact between the second bus bar 500 and the second corner electrode 141b, so as to form a blocking, limiting or reducing effect on the current of the second bus bar 500 being conducted to the second corner electrode 141b through the second barrier portion 300, thereby reducing the current conducted to the second corner electrode 141b and reducing the electric field strength at the second corner electrode 141b.

[0117] In addition, in some embodiments of the present application, the resistance value of the first barrier portion 200 is greater than the resistance value of the first bus bar 400, and the resistance value of the second barrier portion 300 is greater than the resistance value of the second bus bar 500. By providing a barrier portion with a larger resistance, the surface resistance of the local area of ​​the diaphragm is increased, thereby effectively reducing the magnitude of the conducted current.

[0118] It should be noted that, in some embodiments of the present application, the first barrier portion 200 and the second barrier portion 300 are respectively insulating materials, which include insulating glue or high-temperature glue, so as to block the current on the first bus bar 400 from being transmitted to the first corner electrode 161b through the first barrier portion 200, and block the current on the second bus bar 500 from being transmitted to the second corner electrode 141b through the second barrier portion 300, thereby avoiding the influence of the electric field at the first corner electrode 161b and the electric field at the second corner electrode 141b on the interior of the electrochromic film 100, so as to improve the stability of the electrochromic film 100 and the balance between the electric field at the corners and the electric field at non-corners of the electrochromic film 100, thereby improving the service life of the electrochromic film 100. In addition, the first bus bar 400 and the second bus bar 500 can be bonded to the electrochromic film 100 by using insulating glue and high temperature glue to improve the stability of the connection between the first bus bar 400 and the second bus bar 500 and the electrochromic film 100 respectively.

[0119] Some embodiments of the present application further provide a color-changing device, including a substrate layer and an electrochromic film 100 as described in any of the above embodiments and stacked with the substrate layer.

[0120] Specifically, the substrate layer is a transparent structure, for example, the substrate layer can be transparent glass, a transparent acrylic plate or a transparent PVC plate, etc. Preferably, the substrate layer is glass, and the substrate layer is provided with two layers. The electrochromic film 100 can also be sandwiched between the two substrate layers, and an adhesive such as PVB or OCA is provided between the electrochromic film 100 and the substrate layer. At the peripheral edge of the electrochromic film 100, the edge of the electrochromic film 100 is sealed by a sealant, and the two substrate layers 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).

[0121] In addition, the sealant can not only form adhesion between the two substrate layers and the electrochromic film 100, but also seal the electrochromic film 100 to isolate oxygen and air, thereby preventing the electrochromic film 100 from contacting external moisture and oxygen, thereby increasing the service life of the electrochromic film 100 and the service life of the color-changing device.

[0122] In addition, a shielding layer is provided on the inner surface of the substrate layer corresponding to the edge portion 120 of the electrochromic film 100. In order to prevent the user from directly seeing the edge portion 120 of the electrochromic film 100 through the transparent substrate layer, a shielding layer is provided at the edge of the substrate layer, and the busbars and the barrier portion at the edge of the electrochromic film 100 are shielded by the shielding layer, thereby improving the aesthetics of the color-changing device. Preferably, the shielding layer is provided as an ink layer.

[0123] Specifically, in some embodiments of the present application, when the barrier portion is arranged on a side of the bus bar away from the edge of the electrochromic film 100, and the projection of the barrier portion on the plane where the shielding layer is located is located within the shielding layer; the vertical distance between the barrier portion (in this case, the barrier portion refers to the first barrier portion 200) and the bus bar is L1.

[0124] Exemplarily, a vertical distance between a side of the first blocking portion 200 close to the first groove 180 and a side of the first groove 180 close to the first blocking portion 200 is L1.

[0125] Among them, the value range of L1 is 1mm≤L1≤20mm.

[0126] In addition, a vertical distance between a side of the second blocking portion 300 close to the second groove 190 and a side of the second groove 190 close to the second blocking portion 300 is L2.

[0127] Among them, the value range of L2 is 1mm≤L2≤20mm.

[0128] It should be noted that by adjusting the distance between the blocking portion and the groove so that the first blocking portion 200 and the second blocking portion 300 are respectively on the orthographic projection of the plane where the shielding layer is located, the shielding layer can completely cover the first blocking portion 200 and the second blocking portion 300, thereby not affecting the normal visual effect of the user when observing the color-changing device, and at the same time ensuring the aesthetics of the color-changing device.

[0129] In addition, it can be understood that by controlling the value range of L1 and L2, the distances from the first barrier portion 200 and the second barrier portion 300 to the edges of the electrochromic film 100 can be controlled respectively, so as to avoid the influence of the first barrier portion 200 and the second barrier portion 300 on the effective color change area of ​​the electrochromic film 100, thereby ensuring the effective color change area of ​​the electrochromic film 100.

[0130] Preferably, another aspect of the embodiment of the present application further provides a terminal product, including the electrochromic film 100 described in any of the above embodiments or the color changing device as described 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. In this embodiment, since the above electrochromic film 100 or the color changing device is used, all the advantages of the above color changing film and the color changing device are obtained. It has the advantages of reducing the risk of corner failure and extending the life of the product.

[0131] 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.

[0132] 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.

[0133] 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: The electrochromic film comprises a central portion and an edge portion adjacent to the central portion, wherein the edge portion is electrically connected to a bus bar; At least a portion of the edge portion is provided with a blocking portion, and the blocking portion blocks or reduces the current of the bus bar from being conducted from the blocking portion to the central portion.

2. The electrochromic film according to claim 1, characterized in that: The blocking portion is disposed at a corner of the edge portion.

3. The electrochromic film according to claim 2, characterized in that: The corner includes a vertex and two ends connected by edges, 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; or the vertical distance from any point on the edge portion corresponding to the two points at a first preset distance to the line segment connecting the two points is the second preset distance. When the second preset distance is greater than n times the first preset distance, the range of n is 5% to 10%, and the edge portion corresponding to the two points is the corner.

4. The electrochromic film according to claim 3, characterized in that: The first preset distance has a value range of 30 mm to 300 mm.

5. The electrochromic film according to claim 1, characterized in that: The barrier portion includes an etched area formed by etching a portion of the conductive layer and / or a filler having a greater resistance than the bus bar.

6. The electrochromic film according to claim 5, characterized in that: The barrier portion at least penetrates the conductive layer of the edge portion in contact with the bus bar and is located on the side of the bus bar close to the center portion; and / or the barrier portion is arranged between the bus bar and the conductive layer, and the resistance of the barrier portion is greater than the resistance of the bus bar.

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; the edge portion is provided with a first groove and a second groove, and the bus bar comprises a first bus bar and a second bus bar; 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 a first electrode, and the first electrode is 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 a second electrode, and the second electrode is electrically connected to the second bus bar.

8. The electrochromic film according to claim 7, characterized in that: The blocking portion arranged corresponding to the first electrode penetrates the second conductive layer, and / or the blocking portion arranged corresponding to the second electrode penetrates the first conductive layer.

9. The electrochromic film according to claim 8, characterized in that: The barrier portion insulates and separates the first electrode from a central region of the first conductive layer, and / or the barrier portion insulates and separates the second electrode from a central region of the second conductive layer.

10. The electrochromic film according to claim 7, characterized in that: The first electrode includes a first straight-edge electrode and a first corner electrode, the first corner electrode is located at a corner of the electrochromic film, the first corner electrode and the first straight-edge electrode are spaced apart at the edge portion, and the blocking portion is arranged corresponding to the first corner electrode; and / or the second electrode includes a second straight-edge electrode and a second corner electrode, the second corner electrode is located at a corner of the electrochromic film, the second corner electrode and the second straight-edge electrode are spaced apart at the edge portion, and the blocking portion is arranged corresponding to the second corner electrode.

11. The electrochromic film according to claim 7, characterized in that: The blocking portion at least penetrates the first conductive layer and the second conductive layer.

12. The electrochromic film according to claim 7, characterized in that: The barrier portion penetrates the first conductive layer, the electrochromic layer, and the second conductive layer, and the barrier portion also penetrates the first substrate and / or the second substrate.

13. The electrochromic film according to claim 9, characterized in that: The total length of the blocking portion is less than the sum of the length of the first straight-side electrode and the length of the second straight-side electrode.

14. The electrochromic film according to claim 10, characterized in that: The length of the blocking portion is not less than the length of the first corner electrode, and / or the length of the blocking portion is not less than the length of the second corner electrode.

15. The electrochromic film according to claim 14, characterized in that: The blocking portion extends along at least one direction of the extension direction of the first corner electrode, and the blocking portion extends between the first corner electrode and the adjacent first straight-edge electrode; and / or the blocking portion extends along at least one direction of the extension direction of the second corner electrode, and the blocking portion extends between the second corner electrode and the adjacent second straight-edge electrode.

16. The electrochromic film according to claim 14, characterized in that: The blocking portion and the outer edge of the electrochromic film form a blocking area, the first corner electrode is located in the blocking area, and / or the second corner electrode is located in the blocking area.

17. The electrochromic film according to any one of claims 1 to 16, characterized in that: The blocking portion is a linear structure, and the linear structure includes at least any one of a straight line, a broken line, a curve and an arc.

18. The electrochromic film according to any one of claims 1 to 16, characterized in that: The blocking portion is a planar structure, and the planar structure includes at least any one of a polygonal shape, a sector shape, and a curved surface shape.

19. The electrochromic film according to any one of claims 1 to 16, characterized in that: The distance between the blocking portion and the bus bar ranges from 0.3 mm to 20 mm.

20. The electrochromic film according to claim 19, characterized in that: The distance between the barrier and the bus bar is 1 mm.

21. 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 20 which is stacked with the substrate layer.

22. A terminal product, characterized in that: An electrochromic film according to any one of claims 1 to 20 or The color changing device according to claim 21, 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.

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