Electrochromic device, control method, color changing device, terminal product and medium

Abstract

The invention provides an electrochromic device, a control method, a color changing device, a terminal product and a medium, and relates to the technical field of electrochromism. Specifically, the electrochromic device comprises: an electrochromic film; the edge part of the electrochromic diaphragm comprises a straight edge part and a corner part, a first lead-out structure is arranged on the straight edge part, and a second lead-out structure is arranged on the corner part; the first lead-out structure and the second lead-out structure are both used for independently transmitting electric signals to the electrochromic membrane, and the first lead-out structure and the second lead-out structure are respectively used for being electrically connected with a power supply. According to the electrochromic device provided by the invention, the leading-out structures are separately arranged at the corner part and the straight edge part, so that the voltage can be applied to the corner part and the straight edge part at the same time, the problem of non-uniform color change of an electrochromic membrane is solved, and the electrochromic device has the advantage of uniform color change.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochromic technology, and in particular to an electrochromic device, a control method, a color changing device, a terminal product and a medium. Background Art

[0002] Electrochromism is a technology that allows electrochromic materials to reversibly and stably color or fade under the action of external voltage. Devices containing electrochromic materials are electrochromic devices. Usually, a bus bar is arranged at the edge of each conductive substrate layer of the electrochromic device, and the electrochromic device is electrically connected to an external power source through the bus bar, thereby forming a voltage at both ends of the electrochromic device, so that the electrochromic material of the electrochromic device changes color in response to the change of the voltage at both ends.

[0003] At present, a single lead-out structure is set at the edge of each conductive layer of the electrochromic device to supply power to the electrochromic layer. The lead-out structure is usually set in the middle of the edge of the diaphragm, and the diaphragm starts to change color in the middle section close to the lead-out structure, and the corner position of the diaphragm changes color last, resulting in a technical problem of unevenness of the entire diaphragm.

[0004] Therefore, there is an urgent need for an electrochromic device and a control solution thereof that can improve the color change uniformity of the membrane. Summary of the invention

[0005] In order to solve the above technical problems, the embodiments of the present application provide an electrochromic device, a control method, a color-changing device, a terminal product and a medium, which solve the technical problem of the uniformity of color change of the entire diaphragm and have the advantage of uniform color change.

[0006] In some embodiments, the present application provides an electrochromic device, including: an electrochromic film;

[0007] The edge portion of the electrochromic film includes a straight edge portion and a corner portion, the straight edge portion is provided with a first lead-out structure, and the corner portion is provided with a second lead-out structure; the first lead-out structure and the second lead-out structure are both used to transmit electrical signals to the electrochromic film separately, and the first lead-out structure and the second lead-out structure are respectively used to be electrically connected to a power source.

[0008] In one embodiment, the electrochromic device also includes: a controller for controlling the color change of the electrochromic film, the controller being used to output a first control signal to the first lead-out structure, and to output a second control signal value to the second lead-out structure, wherein the signal value of the first control signal is greater than the signal value of the second control signal, or the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal.

[0009] In one embodiment, the first control signal is a first voltage value, the second control signal is a second voltage value, and an absolute value of the first voltage value is greater than an absolute value of the second voltage value.

[0010] In one embodiment, the vertical distance from any point on the edge portion corresponding to two points of the first preset distance to the line segment connected by the two points is a second preset distance, when the second preset distance is less than or equal to n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is a straight edge portion; or any point on the edge portion corresponding to the two points of the first preset distance divides the edge portion between the two points into a first segment and a second segment, the line passing through the point tangent to the first segment is the first tangent, and the line passing through the point tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is greater than or equal to 135°, the edge portion corresponding to the two points is a straight edge portion.

[0011] In one embodiment, the vertical distance from any point on the edge portion corresponding to the two points of the 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 value range of n is 5% to 10%, and the edge portion corresponding to the two points is a corner portion; or the corner portion includes a vertex and two ends connected to each other; the edge portion between the two points of the first preset distance corresponding to any point on the edge portion divides the edge portion between the two points into a first segment and a second segment, the line passing through the point tangent to the first segment is the first tangent, and the line passing through the point tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner portion.

[0012] In one embodiment, the total length of the corner portion is smaller than the total length of the straight side portion.

[0013] In one embodiment, a ratio of a total length of the straight edge portion to a total length of the corner portion is equal to a ratio of a signal value of the first control signal to a signal value of the second control signal.

[0014] In one embodiment, the electrochromic device also includes: a controller for controlling the color change of the electrochromic film; the straight edge portion includes a straight edge electrode, and the straight edge electrode is electrically connected to the controller through the first lead-out structure; and / or the corner portion includes a corner electrode, and the corner electrode is electrically connected to the controller through the second lead-out structure.

[0015] In one embodiment, the electrochromic device also includes a first bus bar and a second bus bar, the first bus bar is electrically connected to the first lead-out structure, and the second bus bar is electrically connected to the second lead-out structure; the first bus bar is electrically connected to the straight-edge electrodes with the same polarity; the second bus bar is electrically connected to the corner electrodes with the same polarity.

[0016] In one embodiment, each of the straight-edge electrodes is electrically connected to the controller independently, and / or each of the corner electrodes with the same electrical properties is electrically connected to the controller independently.

[0017] In some embodiments, the present application provides a control method for an electrochromic device, wherein the edge portion of the electrochromic film includes a straight edge portion and a corner portion, the straight edge portion is provided with a first lead-out structure, and the corner portion is provided with a second lead-out structure, and the method includes:

[0018] Obtaining a dimming signal of an electrochromic device;

[0019] Controlling output of a first control signal to the first lead-out structure according to the dimming signal, and controlling output of a second control signal to the second lead-out structure according to the dimming signal;

[0020] The signal value of the first control signal is greater than the signal value of the second control signal, or the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal.

[0021] The step of controlling the output of the second control signal to the second lead-out structure according to the dimming signal comprises:

[0022] Get the target open circuit voltage OCV corresponding to the dimming signal,

[0023] The second control signal is output to the second lead-out structure according to the target open circuit voltage OCV, wherein an absolute value of a voltage value of the second control signal is less than or equal to an absolute value of the target open circuit voltage OCV.

[0024] In one embodiment, the method further includes: obtaining the current magnitude of the first lead-out structure, and when the current of the first lead-out structure is less than a preset current value, controlling to stop outputting the first control signal to the first lead-out structure.

[0025] In one embodiment, the method further includes: obtaining the current size of the second lead-out structure, and when the current of the second lead-out structure is greater than a first preset threshold, controlling to stop outputting a second control signal; or when the current of the second lead-out structure is less than or equal to a second preset threshold, controlling to stop outputting the second control signal; wherein, the first preset threshold is the safety current of the electrochromic device, and the second preset threshold is the theoretical stable current of the electrochromic device when fully charged or fully discharged.

[0026] In one embodiment, the first control signal is a first voltage value, the second control signal is a second voltage value, and an absolute value of the first voltage value is greater than an absolute value of the second voltage value.

[0027] In one embodiment, the method further comprises:

[0028] respectively obtaining signal values ​​of the first control signal and the second control signal;

[0029] When the signal value of the first control signal is greater than or equal to a first preset threshold, stopping outputting the first control signal;

[0030] When the signal value of the second control signal is greater than or equal to a second preset threshold, the output of the second control signal is stopped, wherein the first preset threshold is greater than the second preset threshold.

[0031] In one embodiment, the method further comprises:

[0032] Acquire a signal difference between the first control signal and the second control signal;

[0033] When the signal difference is less than a third preset threshold, the output of the second control signal is stopped.

[0034] In one embodiment, the first control signal includes at least one of a current signal, a charge amount, a voltage signal and a time signal; the second control signal includes at least one of a current signal, a charge amount, a voltage signal and a time signal.

[0035] In one embodiment, the method further comprises:

[0036] Get the ratio s of the total length of the straight edge portion to the total length of the corner portion;

[0037] The first control signal and the second control signal are controlled to be output, wherein the ratio of the signal values ​​of the first control signal and the second control signal is equal to s.

[0038] In some embodiments, the present application provides a color-changing device, including a substrate layer and an electrochromic device as described in any of the above embodiments, which is stacked with the substrate layer.

[0039] In some embodiments, the embodiments of the present application provide a terminal product, comprising an electrochromic device as described in any of the above embodiments or a color-changing device as described in any of the above embodiments, wherein the terminal product includes any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, an electronic product housing, glasses, a vehicle, and a display panel.

[0040] An embodiment of the present application further provides a processor, which is used to execute any of the above methods for controlling an electrochromic device.

[0041] In some embodiments, the present application also provides a computer storage medium storing a computer program, which executes the control method of the electrochromic device described in any one of the above embodiments when the computer program is run on a processor.

[0042] The electrochromic device, control method, color-changing device, terminal product and medium provided by the present application can apply voltage to the first lead-out structure and the second lead-out structure at the same time according to the demand by respectively setting the lead-out structure at the straight edge part and the corner part of the electrochromic device. At this time, the area corresponding to the straight edge part and the area corresponding to the corner part change color at the same time, thereby improving the uniformity of the color change of the electrochromic device. In addition, the embodiment of the present application sets the lead-out structure separately for the straight edge part and the corner part of the electrochromic device, so that the corner part and the straight edge part can be controlled separately, so that the user can flexibly control the electrochromic film according to the demand and the actual use situation. The technical problem of uneven color change in the prior art is solved, and it has the advantages of uniform color change and flexible control.

[0043] In addition, the embodiment of the present application also achieves the purpose of separate control by sending different control signals to the corner part and the straight edge part, and by controlling the control signal value of the corner part to be smaller than the control signal value of the straight edge part, the effective voltage of the corner area corresponding to the corner part is reduced, thereby reducing the risk of premature failure of the corner area. In addition, separate control can also be performed by controlling the different power-on times of the corner electrodes and the straight edge electrodes. The field strength and effective uniformity of each area of ​​the electrochromic film can be ensured, premature aging failure caused by excessive field strength in the corner area is avoided, and the service life of the electrochromic device is increased. And the control method of the electrochromic film of the embodiment of the present application has the advantages of simple operation and easy execution. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. In each of the drawings, similar components are numbered similarly.

[0045] Figure 1 A structural schematic diagram of an electrochromic film according to one embodiment of the present application is shown;

[0046] Figure 2 A schematic structural diagram showing another perspective of an implementation of an electrochromic film provided in some embodiments of the present application;

[0047] Figure 3 A schematic structural diagram showing another perspective of an implementation of an electrochromic film provided in some embodiments of the present application;

[0048] Figure 4 A schematic structural diagram showing another perspective of an implementation of an electrochromic film provided in some embodiments of the present application;

[0049] Figure 5 A structural schematic diagram of an electrochromic film according to one embodiment of the present application is shown;

[0050] Figure 6 A structural schematic diagram showing a first color-changing layer of an implementation manner of an electrochromic film provided in some embodiments of the present application from a viewing angle;

[0051] Figure 7 A structural schematic diagram of an electrochromic film according to one embodiment of the present application is shown;

[0052] Figure 8 A schematic structural diagram showing a second color-changing layer of an implementation manner of an electrochromic film provided in some embodiments of the present application from a viewing angle;

[0053] Fig. 9 A schematic structural diagram showing another perspective of an implementation of an electrochromic film provided in some embodiments of the present application;

[0054] Fig.10 A schematic structural diagram showing another perspective of an implementation of an electrochromic film provided in some embodiments of the present application;

[0055] Fig.11 A schematic diagram of a process of a first implementation of a method for controlling an electrochromic device provided in an embodiment of the present application is shown;

[0056] Fig.12 A schematic flow chart of a second embodiment of the method for controlling an electrochromic device provided in an embodiment of the present application is shown;

[0057] Fig.13 A structural schematic diagram from one viewing angle of an implementation of a color changing device provided in some embodiments of the present application is shown.

[0058] 100-electrochromic film; 110-center part; 120-edge part; 121-straight-edge electrode; 121a-first straight-edge electrode; 121b-second straight-edge electrode; 122-corner electrode; 122a-first corner electrode; 122b-second corner electrode; 131-first lead-out structure; 131a-first FPC; 131b-second FPC; 132a-third FPC; 132b-fourth FPC; 131c-fifth FPC; 131d-sixth FPC; 132c-seventh FPC; 132d-eighth FPC; 132-second lead-out structure; 210-first substrate layer; 140-first conductive layer; 230-electrochromic stack layer; 150-second conductive layer ;220-second base layer;240-first bus bar;250-second bus bar;155-corner groove;156-corner groove;351-corner groove;352-corner groove;353-corner groove;354-corner groove;145-straight-edge groove;341a-second straight-edge groove;341b-first straight-edge groove;342a-first straight-edge groove;342b-second straight-edge groove;343a-second straight-edge groove;343b-first straight-edge groove;344a-first straight-edge groove;344b-second straight-edge groove;510-shielding layer;520-shielding layer;530-sealant;540-substrate layer;550-substrate layer;560-bus bar;570-bus bar. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0060] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0061] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0062] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0063] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0064] The following is combined with Figure 1 To Attachment Fig.13 This application is described in further detail.

[0065] The embodiments of the present application provide an electrochromic device, a control method, a color-changing device, a terminal product and a medium, which are mainly used in large-area smart glass such as glass curtain walls, automobile sunroofs, side windows, front and rear windshields, and sun visors. The color of the electrochromic device is changed by changing the voltage across the two ends of the electrochromic device, thereby changing the light transmittance of the electrochromic device, so that the electrochromic device has the functions of dimming and shading.

[0066] An embodiment of the present application provides an electrochromic device, including: an electrochromic film;

[0067] The edge portion of the electrochromic film includes a straight edge portion and a corner portion, the straight edge portion is provided with a first lead-out structure, and the corner portion is provided with a second lead-out structure; the first lead-out structure and the second lead-out structure are both used to transmit electrical signals to the electrochromic film separately, and the first lead-out structure and the second lead-out structure are respectively used to be electrically connected to a power source.

[0068] See also Figure 1 , Figure 1A structural schematic diagram of a perspective of an implementation method of an electrochromic film provided by some embodiments of the present application is shown. The electrochromic film 100 includes a central portion 110 and an edge portion 120 connected to the central portion, and the edge portion 120 is connected to the central portion 110 and extends to the outside of the electrochromic film. The edge portion 120 of the electrochromic film includes a straight edge portion and a corner portion. Specifically, the edge of the electrochromic film includes at least a first edge, a second edge, and a third edge connected end to end in sequence. In this embodiment, the electrochromic film is a quadrilateral as an example for specific description. In other embodiments, the edge portion of the electrochromic film can also be a special-shaped structure, such as an edge formed by enclosing multiple curved edges. In this way, the corner portion can be considered as an area with a curvature within a certain range as a corner area. Of course, in other embodiments, the shape of the electrochromic film can be irregular, and for the irregular shape, there are curved parts on the edge, and the curved parts correspond to the corner parts. In addition, the curvature of the edge part can be considered as a straight edge part within a certain range to indicate that this part can be approximately regarded as a straight line part. It is worth noting that the power source in this application can be a vehicle power source, an external power source, a mobile power source, an energy storage battery, etc.

[0069] In addition, in the preferred solution of the present application, in the edge portion of the electrochromic film, any point on the edge portion corresponding to the two points of the first preset distance, the vertical distance to the line segment formed by the two points is the second preset distance, when the second preset distance is less than or equal to n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is a straight edge portion; or any point on the edge portion corresponding to the two points of the first preset distance divides the edge portion between the two points into a first segment and a second segment, and 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 greater than or equal to 135°, the edge portion corresponding to the two points is a straight edge portion. The first preset distance is 5 cm to 20 cm; wherein the second preset distance is 5% to 10% of the first preset distance, preferably 6%. For example, the distance between the farthest point in the electrode corresponding to the two points with a first preset distance of 5 cm and the line connecting the two points is less than 0.3 cm. For another example, the distance between the farthest point of the electrodes corresponding to two points at 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 electrodes corresponding to two points at a distance of 20 cm and the line connecting the two points is less than 1 cm, then the corresponding parts within the two points are considered to be straight edge parts. 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 usage. It is worth noting that when the maximum value of the distance between the corresponding edge part and the line connecting the two end points is greater than the second preset distance, the edge is considered to be a corner part, and the corresponding electrode is a corner electrode. Alternatively, the two straight edge parts intersect to form the corner part, and the angle between the two straight edge parts is less than 135°.

[0070] Some embodiments of the present application are improved on the basis of any of the above embodiments, and the vertical distance from any point on the edge portion corresponding to the two points of the first preset distance to the line segment connecting the two points is the second preset distance, and when the second preset distance is greater than n times the first preset distance, the value range of n is 5% to 10%, and the edge portion corresponding to the two points is a corner portion; or the corner portion includes a vertex and two ends connected to each other; the edge portion between the two points of the first preset distance corresponds to any point on the edge portion, and the edge portion between the two points is divided into a first segment and a second segment, and the line passing through the point tangent to the first segment is the first tangent, and the line passing through the point tangent to the second segment is the second tangent, and when the angle between the first tangent and the second tangent is less than 135°, the point is the vertex of the corner portion.

[0071] In this embodiment, the electrochromic device also includes a fourth side. The ends of any two adjacent sides form an angle area, and the corresponding ends of the two sides are the corner parts of the diaphragm; other non-corner areas correspond to straight edge parts. It is worth noting that the length of the specific corner area is affected by the size of the electrochromic diaphragm. For diaphragms of different sizes, the length of the corresponding corner area is different. For ease of understanding, Figure 1 The portion within the dashed line frame represents the center portion of the electrochromic film, which can also be regarded as the visible area of ​​the electrochromic film, and the portion outside the dashed line frame represents the edge portion of the electrochromic film. It is worth noting that the dashed line in the figure does not define the boundary between the center portion and the edge portion. In other embodiments, the boundary between the edge portion and the center portion can be adjusted as required. Specifically, see Figure 1 , a straight-edge electrode 121 is arranged on the straight-edge portion, and a corner electrode 122 is arranged on the corner portion. The straight-edge electrodes 121 and the corner electrodes 122 are arranged alternately. In this embodiment, the straight-edge electrodes 121 and the corner electrodes 122 are connected to the same conductive layer. Of course, the straight-edge electrodes and the corner electrodes can also be connected to different conductive layers respectively. At this time, the straight-edge electrodes and the corner electrodes have the same orientation, and they respectively penetrate the first substrate layer 210 and leak out of the first conductive layer 140 to form the straight-edge electrode 121; penetrate the first substrate layer 210, the first conductive layer 140, and the electrochromic stacking layer 230, and leak out of the second conductive layer 150 to form the corner electrode 122; or only penetrate the first substrate layer 210 and leak out of the first conductive layer 140 to form the corner electrode 122; penetrate the first substrate layer 210, the first conductive layer 140, the electrochromic stacking layer 230, and leak out of the second conductive layer 150 to form the straight-edge electrode 121.

[0072] also, Figure 1 The electrochromic film shown in the figure also includes a first lead-out structure 131 and a second lead-out structure 132 (see Figure 2 ). The first lead-out structure 131 and the second lead-out structure 132 are independent of each other and are electrically connected to the power supply, and are used to transmit electrical signals to the electrochromic film. If the first lead-out structure 131 inputs electrical signals to the straight edge part, the second lead-out structure 132 can also input electrical signals to the corner part. Therefore, the first lead-out structure 131 and the second lead-out structure 132 can be independently controlled by the power supply. Specifically, the following will be combined with Figure 2-Figure 10 The specific configuration and function of the first lead-out structure and the second lead-out structure are described in detail.

[0073] For example, see Figure 2 and Figure 3 , Figure 2 A structural schematic diagram of a viewing angle of an implementation of an electrochromic film provided in some embodiments of the present application is shown; Figure 3 Shows Figure 2 Schematic diagram of the structure of the electrochromic film from another perspective (back side). The first lead-out structure 131 is electrically connected to the conductive layer corresponding to the straight-edge electrode 121. The second lead-out structure 132 is electrically connected to the conductive layer corresponding to the corner electrode 122.

[0074] For a clearer presentation, the electrochromic device further comprises: a controller for controlling the color change of the electrochromic film; the straight edge portion comprises a straight edge electrode, the straight edge electrode is electrically connected to the controller via the first lead-out structure; and / or the corner portion comprises a corner electrode, the corner electrode is electrically connected to the controller via the second lead-out structure. Figure 4 , Figure 4 for Figure 3 Cross-sectional view of the BB plane. Take the straight-edge electrode as the leaked first conductive layer 140; the corner electrode as the leaked second conductive layer 150 as an example. The electrochromic film comprises a first substrate layer 210, a first conductive layer 140, an electrochromic stacking layer 230, a second conductive layer 150, and a second substrate layer 220 which are stacked in sequence; wherein the electrochromic stacking layer comprises: an electrochromic layer, an electrolyte layer, and an ion storage layer. In other embodiments, the electrochromic stacking layer may be a liquid crystal material. The first substrate layer 210 extends from its central portion to the outside of the film to form an edge portion of the first substrate layer 210, and the second substrate layer 220 extends from its central portion to the outside of the film to form an edge portion of the second substrate layer 220; the projections of the edge portion of the first substrate layer 210 and the edge portion of the second substrate layer 220 on the plane where the electrochromic layer is located at least partially do not overlap. In addition, the electrochromic film further includes corner grooves (155, 156), straight-edge grooves 145, and a first bus bar 240 and a second bus bar 250. The corner grooves (155, 156) are located at the corners of the electrochromic film, penetrate the first substrate layer 210 and the first conductive layer 140 of the electrochromic film, and leak out of the second conductive layer 150 to form a corner electrode; the straight-edge grooves 145 are located at the straight-edge portion of the electrochromic film, and penetrate the second substrate layer 220 and the second conductive layer 150 to leak out of the first conductive layer 140 to form a straight-edge electrode.

[0075] like Figure 4As shown, the first conductive layer 140 also extends from its central part to the outside of the film (in the direction of the paper in the figure) and is attached to the surface of the edge portion of the first substrate layer 210 to form the edge portion of the first conductive layer 140. The second conductive layer 150 also extends from its central part to the outside of the electrochromic film and is attached to the surface of the edge portion of the second substrate layer 220 to form the edge portion of the second conductive layer 150. The edge portion of the electrochromic film includes the above-mentioned edge portion of the first substrate layer 210, the edge portion of the first conductive layer 140, the edge portion of the second substrate layer 220, and the edge portion of the first conductive layer 140. Therefore, the corner portion includes the edge portion of the second substrate layer 220 and the edge portion of the second conductive layer 150 at the corner of the film; the straight edge portion includes the edge portion of the first substrate layer 210 and the edge portion of the first conductive layer 140 at the non-corner of the film.

[0076] In some embodiments of the present application, the first substrate layer 210 and the second substrate layer 220 are both PET (Polyethylene terephthalate) or other transparent flexible materials, and the first conductive layer 140 and the second conductive layer 150 are both transparent ITO (Indium Tin Oxide) or other conductive oxide materials. In this embodiment, ITO is attached to the first substrate layer 210 and the second substrate layer 220 by magnetron sputtering. The electrochromic layer includes an electrochromic material layer, an electrolyte layer and an ion conduction layer stacked in sequence, and in other embodiments, it can also be a liquid crystal material layer. By connecting the first conductive layer 140 and the second conductive layer 150 to an external power source at the same time, an electric field can be formed between the first conductive layer 140 and the second conductive layer 150, so that the electrochromic layer undergoes a stable and reversible color change under the action of the electric field.

[0077] Combination Figure 3 as well as Figure 4As shown, a first lead-out structure 131 is provided on the straight edge portion, one end of the first lead-out structure 131 is connected to the first conductive layer 140 corresponding to the straight edge portion, and the other end extends to the outside of the diaphragm to be electrically connected to an external power source. A first bus bar 240 is attached to the edge of the diaphragm, and the first lead-out structure 131 is electrically connected to the straight edge electrode through the first bus bar 240. A second lead-out structure 132 is provided on the corner portion, and the second lead-out structure 132 is connected to the second conductive layer 150 corresponding to the corner portion, and extends to the outside of the diaphragm to be electrically connected to an external power source. The second bus bar is attached to the edge of the diaphragm, and the second lead-out structure 132 is electrically connected to the corner electrode through the second bus bar 250. The first lead-out structure 131 and the second lead-out structure 132 are independent of each other and are electrically connected to the controller respectively; the first lead-out structure 131 and the second lead-out structure 132 can be a flexible circuit board directly connected to the conductive layer, such as an FPC, or a bus bar is provided on the corresponding wire layer, and an FPC is provided on the bus bar. In other words, the first lead-out structure 131 and the second lead-out structure 132 may be in point contact or surface contact with the corresponding conductive layer. It is worth noting that the first lead-out structure 131 and the second lead-out structure 132 are independent of each other, which means that the first lead-out structure 131 and the second lead-out structure 132 supply power to the electrochromic film independently of each other, and may supply power to the electrochromic film simultaneously or successively; in addition, the first lead-out structure 131 and the second lead-out structure 132 may supply power to different conductive layers or to the same conductive layer.

[0078] The embodiment of the present application sets lead structures on the straight edge part and the corner part of the electrochromic device respectively, and can apply voltage to the first lead structure and the second lead structure at the same time according to the demand, so that the area corresponding to the straight edge part and the area corresponding to the corner part change color at the same time, thereby improving the uniformity of the color change of the electrochromic device. In addition, the embodiment of the present application sets lead structures on the straight edge part and the corner part of the electrochromic device separately, so that the corner part and the straight edge part can be controlled separately, so that the user can flexibly control the electrochromic film according to the demand and the actual use situation. The technical problem of uneven color change in the prior art is solved, and it has the advantages of uniform color change and flexible control.

[0079] Preferably, based on the above embodiment, the electrochromic film further includes a controller for controlling the electrochromic film, the controller is electrically connected to the first lead-out structure 131 and the second lead-out structure 132 respectively; the controller is used to output a first control signal to the first lead-out structure 131, and the straight edge portion changes its color in response to the first control signal, and the controller outputs a second control signal value to the second lead-out structure 132, and the corner portion changes color in response to the second control signal. The signal value of the first control signal is greater than the signal value of the second control signal.

[0080] Preferably, based on the above embodiment, an improvement is made, the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal. When the same voltage is input to the electrochromic device, but the input time is different, or the time sequence is different, even if the same control signal is used to control the color change of the two areas, the corner failure can also be effectively alleviated.

[0081] The first control signal includes one of the following: current signal, charge amount, voltage signal and time signal; the second control signal includes one of the following: current signal, charge amount, voltage signal and time signal. In practical applications, the control signal can be adjusted by changing the magnitude of the current signal, charge amount and voltage signal; the first control signal and the second control signal can also be adjusted by changing the length of the power-on time, that is, by changing the time signal.

[0082] The first control signal is a first voltage value, the second control signal is a second voltage value, and the absolute value of the first voltage value is greater than the absolute value of the second voltage value.

[0083] The inventors discovered that after the conductive layer of the electrochromic film in the prior art is connected to a power source, the external power source conducts current to the conductive layer. Since the bus bars in the corner parts on both adjacent sides conduct current to the corner area, the corner area is usually affected by the current conducted by the bus bars on both sides, while the non-corner area is only affected on one side. This results in the effective voltage and electric field in the corner area being larger than those in the non-corner area during the charging process, which causes the corner area to be overcharged or over-discharged during the charging and discharging process, which in turn causes the corner area to age prematurely and fail prematurely, and even accelerates the failure of other areas.

[0084] In view of this, in the embodiment of the present application, by limiting the straight edge part and the corner part of the electrochromic device to set the lead-out structure separately, the straight edge part and the corner part can be controlled separately; and by controlling the signal value of the output second control signal to be less than the signal value of the first control signal, the corner area is always less affected than the non-corner area during the charging and discharging process, and because the conductive layer itself has resistance and there is a voltage drop, even if the two sides of the corner part overlap in the area corresponding to the corner area, the effective voltage at the overlapping point will not be too large. Therefore, even if the electric field overlaps, the impact on the corner area will not be much higher than the impact on the non-corner area as in the prior art. Therefore, the phenomenon of overcharging or over-discharging in the corner area is reduced, and the possibility of failure in the corner area is reduced. When a control signal for controlling the color change of the electrochromic film is output to the electrochromic film, since the signal value of the second control signal is smaller than the signal value of the first control signal, the superposition effect of the control signals on both sides on the corner area of ​​the electrochromic film will be smaller than that in the prior art, effectively alleviating the failure of the corner area; in addition, the size of the first control signal value and the second control signal value can also be adjusted to make the electric field of the corner area and the non-corner area closer during the charging and discharging process, and the electric field of the entire film is in a relatively balanced state, avoiding long-term overcharging or over-discharging of part of the film area and premature failure, thereby improving the service life of the electrochromic device; solving the technical problem of premature failure of the corner area of ​​the electrochromic film in the prior art, and having the advantages of uniform color change and long service life. In addition, in the embodiment of the present application, the corner part and the straight edge part are provided with a lead-out structure, that is, during charging and discharging, the current is conducted from the edges of the electrochromic film to the inside, which accelerates the color change speed of the entire electrochromic film; and the corner area also begins to change color at the same time, and there will be no large color difference between the corner area and the straight edge area during the color change process, which reduces the user's visual error and thus improves the user's experience.

[0085] Preferably, further improved on the basis of the above embodiment, the first control signal and the second control signal are both current signals, or both are voltage signals. That is to say, the current or voltage of the corner portion is controlled to be smaller than the current or voltage of the straight edge portion. Exemplarily, when the first control signal and the second control signal are both current signals, the current input to the straight edge portion is larger than the current input to the corner portion. At this time, the current of the straight edge portion is conducted from the straight edge portion of the edge portion 120 to the central portion 110. Due to the voltage drop in the conductive layer, the current at the position close to the lead-out structure is usually larger. Due to the influence of the two sides of the corner area, the currents on both sides diffuse to the corner area and overlap, which will play a reinforcing role in the corner area. Since the signal value of the second control signal is small, that is, the current conducted to the corner portion is small, and there is a voltage drop in the conductive layer, the currents on both sides will not overlap too much due to the overlap of the two sides at the overlap, so the field strength at the overlap is also relatively small. Therefore, the current size in the corner area is closer to the current size at the straight edge, thereby playing a more balanced role and reducing the technical problem of premature failure of the corner area of ​​the entire diaphragm. In addition, since the current is easier to monitor as a control signal, the current size at that location can be detected in real time, thereby making it easier to control the current size at the corner portion and the straight edge portion, making the control method simpler and easier to control.

[0086] For another example, the first control signal and the second control signal are both voltage signals, the first control signal is a first voltage value, the second control signal is a second voltage value, and the absolute value of the first voltage value is greater than the absolute value of the second voltage value. That is, the voltage input to the straight edge part is greater than the voltage input to the corner part; since the voltage in the corner part is relatively small, the effective voltage received by the corner area is small, which will not cause overcharging and over-discharging of the electrochromic device during the charging and discharging process; therefore, in the process of charging the electrochromic device, the electric field strength received by the electrochromic layer in the corner area is also smaller than the field strength of the straight edge part, thereby effectively alleviating the premature failure of the corner area of ​​the electrochromic film. It is worth noting that, relative to other parameters, the first control signal and the second control signal can also be any one of the charge amount and time signals.

[0087] For another example, the first control signal and the second control signal are both charges, that is, the charge input to the straight edge portion is greater than the charge input to the corner portion. In this way, by inputting a smaller charge to the corner portion, the field strength received by the corner area during the charging and discharging process is smaller. After a smaller charge is input to the corner portion, the corner area has not reached the end of the color change. The larger charge input through the straight edge portion diffuses to the corner area, and finally the charge of the entire diaphragm is uniform, thereby achieving the effect of uniform color change of the entire diaphragm. Since a smaller charge is input to the corner portion, during the charging process, the electric field strength received by the corner area is smaller than that received by the straight edge electrode, thereby alleviating corner failure and increasing the service life of the diaphragm.

[0088] For example, the first control signal and the second control signal are both power-on time, that is, the first control signal and the second control signal are both time signals. Specifically, the time signal can be a length of time or a sequence of time. For example, the first lead-out structure can be used to apply a current signal / voltage signal to the straight edge part for charging. After a certain preset time, such as 10 seconds, the second lead-out structure can be used to charge the corner part. By charging the straight edge part first, the electric field of the straight edge part reaches a certain intensity first, and then the corner part is charged. At this time, the electric field of the corner part is gradually enhanced. Since the corner part starts charging and discharging later than the straight edge part, the field strength of the corner part is always smaller than that of the straight edge part during the charging and discharging process, thereby effectively alleviating the technical problem of failure of the corner of the electrochromic film. For another example, the first lead-out structure and the second lead-out structure are powered on at the same time, and the charging of the straight edge part by the first lead-out structure is stopped after the first preset time, and the charging of the corner part by the second lead-out structure is stopped after the second preset time, wherein the first preset time is greater than the second preset time. In other words, the charging and discharging of the straight edge part and the corner part are controlled at the same time, but the charging and discharging of the corner part ends earlier than the straight edge part. Since the electrochromic film charges and discharges slowly, it takes a long time to complete the charging and discharging of the entire film; the electrochromic film is charged and discharged at the same time. At the beginning of charging and discharging, the electric field strength of the entire electrochromic film is 0, and each part begins to gradually increase, and the charging and discharging of the corner area ends in advance, that is, the field strength change in the corner area ends in advance, so that the corner area is disconnected when it is not full, and it will not be overcharged or over-discharged; then the current charged through the straight edge part diffuses to the corner area, and finally reaches the balance of the entire film. The electrochromic film starts to change color at the same time, ensuring the visual effect of the user at the beginning, and at the same time, the field strength of the corner part is smaller before the color change is completed, thereby effectively alleviating the failure of the corner.

[0089] It is worth noting that the connection between the first lead-out structure and the straight edge portion, and the connection between the second lead-out structure and the corner portion may include one of the following: 1. For example, Figure 2The first lead-out structure 131 is connected to the first conductive layer 140, as shown in FIG. Figure 3 The second lead-out structure 132 shown is connected to the second conductive layer 150. In this case, the straight-edge electrodes are all arranged on the first conductive layer 140, and the corner electrodes are all arranged on the second conductive layer 150; 2. In contrast to the first case, the first lead-out structure is connected to the second conductive layer, and the second lead-out structure is connected to the first conductive layer. In this case, the straight-edge electrodes are all arranged on the second conductive layer, and the corner electrodes are all arranged on the first conductive layer; that is, in the first and second cases, all the straight-edge electrodes are arranged on one conductive layer, and all the corner electrodes are arranged on the same conductive layer. For the first and second types, the first lead-out structure 131 and the second lead-out structure 132 are electrically connected to a conductive layer respectively, so that the first lead-out structure 131 and the second lead-out structure 132 are electrically independent, which facilitates the arrangement of the first lead-out structure 131 and the second lead-out structure 132, making the structure of the entire diaphragm simpler; 3. The first lead-out structure 131 is connected to the first conductive layer 140 and the second conductive layer 150, and the second lead-out structure 132 is connected to the first conductive layer 140 and the second conductive layer 150, such as Figure 5 Shown to Figure 8 shown.

[0090] Preferably, further improvements are made based on any of the above embodiments. Figure 5 and Figure 7 , Figure 5 A structural schematic diagram of a viewing angle of an implementation of an electrochromic film provided in some embodiments of the present application is shown. Figure 7 Shows Figure 5 A schematic structural diagram from another perspective, the electrochromic film includes a straight-edge electrode and a corner electrode, the straight-edge electrode includes a first straight-edge electrode 121a and a second straight-edge electrode 121b; the corner electrode includes a first corner electrode 122a and a second corner electrode 122b. The electrochromic film also includes a first lead-out structure 131 and a second lead-out structure 132, wherein the first lead-out structure 131 includes a first FPC 131a and a second FPC 131b, and the second lead-out structure 132 includes a third FPC 132a and a fourth FPC 132b. Based on any of the above embodiments, an improvement is made, the second FPC 131b is connected to the straight-edge portion of the first conductive layer 140, the first FPC 131a is connected to the straight-edge portion of the second conductive layer 150; the fourth FPC 132b is connected to the corner portion of the first conductive layer 140, and the third FPC 132a is connected to the corner portion of the second conductive layer 150. That is, corresponding to a single conductive layer, two lead structures are provided, and the two lead structures are independently provided in the edge portion and the straight edge portion of the electrochromic film. It should be noted that the lead structures shown in the figure are only for example. In actual applications, the lead structures are not limited to Figure 5 or Figure 7 The positions and quantities shown are as follows. Based on the independent lead-out structures, the corner part and the straight edge part can be controlled separately, thereby inputting control signals of different sizes to the corner part and the straight edge part.

[0091] The edge portion of the first substrate layer and the edge portion of the second substrate layer may extend in opposite directions, that is, relative to the plane where the electrochromic film is located, the first conductive 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, the edge portion of the first substrate layer and the edge portion of the second substrate layer may extend in the same direction, such as Figure 4 In the figure, the first substrate layer and the second substrate layer both extend outside the paper. In the embodiment of the present application, it is preferred that the first conductive substrate and the second conductive substrate on each side both extend outside the electrochromic film so that their shadows at least partially do not overlap, forming a multi-electrode structure arranged alternately. The first conductive layer and one of the bus bars corresponding to the non-overlapping projections of the edge portion of the first substrate layer and the edge portion of the second substrate layer are electrically connected as the positive or negative electrode of the electrochromic film, and the second conductive layer and the other bus bar are electrically connected as the negative or positive electrode of the electrochromic film, thereby providing voltage to the electrochromic layer.

[0092] Preferably, based on any of the above embodiments, as a further improvement, the straight edge portion includes a straight edge electrode, which is electrically connected to the controller via the first lead-out structure; and / or the corner portion includes a corner electrode, which is electrically connected to the controller via the second lead-out structure.

[0093] Exemplarily, corner grooves are provided at the corner positions around the electrochromic device, such as Figure 4 In the embodiment, the corner grooves (155, 156) penetrate the first conductive substrate 210 (or the second conductive substrate 220), the electrochromic layer leaks out of the second conductive layer 150 (or the first conductive layer 140) to form the corner electrode 122, and the edges adjacent to the corner grooves 155 and 156 are provided with straight-edge grooves 145, the straight-edge grooves 145 penetrate the first conductive substrate 210 (the second conductive substrate 220), the electrochromic layer leaks out of the second conductive layer 150 (the first conductive layer 140) to form the straight-edge electrode 121. Which layer the corner grooves penetrate is related to the polarity of the corner electrode and the straight-edge electrode, that is, to the conductive layer connected to the first lead-out structure 131 and the second lead-out structure 132.

[0094] Preferably, the above technical solution is further improved, such as Figure 6 and Figure 8 As shown, Figure 6 This is a schematic diagram of the structure of the first conductive layer in one embodiment of the present application. Figure 8 FIG. 1 is a schematic diagram of the structure of the second conductive layer in one embodiment of the present application. Figure 5 and Figure 7 The corner electrode includes a first corner electrode 122a and a second corner electrode 122b; the straight-edge electrode includes a first straight-edge electrode 121a and a second straight-edge electrode 121b. The electrochromic film also includes a corner groove and a straight-edge groove, and the corner groove also includes a first corner groove (351, 353) and a second corner groove (352, 354). Specifically, Figure 6 The first corner grooves (351, 353) penetrate the first substrate 210, the first conductive layer 140 and the electrochromic layer, and the exposed second conductive layer 150 respectively form the first corner electrodes 122a. Figure 8 The second corner grooves 352 and 354 penetrate the second substrate 220, the second conductive layer 150 and the electrochromic layer, and the first conductive layer 140 exposed therefrom respectively forms the second corner electrode 122b. The straight-edge grooves also include a first straight-edge groove (341b, 342a, 343b, 344a), and a second straight-edge groove (341a, 342b, 343a, 344b). Specifically, the first straight-edge grooves 341b, 342a, 343b, 344a penetrate the first substrate 210, the first conductive layer 140 and the electrochromic layer, and the second straight-edge grooves 341a, 342b, 343a, 344b penetrate the second substrate 220, the second conductive layer 150 and the electrochromic layer, and the first conductive layer 140 exposed therefrom respectively forms the second straight-edge electrode 121b. It is worth noting that a spacing area is formed between each groove, that is, a spacing area is formed between two electrodes. Specifically, the corner groove and the straight edge groove run through or the edge of the electrochromic film is provided with multiple electrodes, and the multiple electrodes include corner electrodes located at the edge corners and straight edge electrodes located in the non-corner area. An overlapping area is formed between each electrode, so that the sides of the corner electrode and the straight edge electrode do not touch each other, but are connected through the conductive layer in the center area.

[0095] In the embodiment of the present application, the straight-edge electrodes and the corner electrodes are independent of each other, and both the straight-edge electrodes and the corner electrodes extend in the extension direction of each side. There is a communication connection between the controller and the straight-edge electrodes or the corner electrodes, which can be directly connected to the electrodes through a lead-out structure, or can be connected to the FPC etc. through a bus bar set on the electrodes. The specific connection method is not limited, and a communication connection is sufficient.

[0096] Specifically, corner grooves and straight-edge grooves pass through or multiple electrodes are set on the edge of the electrochromic film. The multiple electrodes include corner electrodes located at the edge corners and straight-edge electrodes located in non-corner areas. An overlapping area is formed between the electrodes, so that the sides of the corner electrodes and the straight-edge electrodes do not contact each other, but are connected through the conductive layer in the center area, effectively reducing the risk of insulation between the corner electrodes and the straight-edge electrodes.

[0097] Preferably, the edge portion of the first substrate layer and the edge portion of the second substrate layer can extend in the same direction. In the embodiment of the present application, preferably, the first conductive substrate and the second conductive substrate on each side extend outward from the electrochromic film so that their shadows at least partially do not overlap, forming an alternating multi-electrode structure. Each side of the electrochromic film is provided with a plurality of second straight-edge grooves and first straight-edge grooves at intervals, and a multi-electrode structure is alternately formed on the edge portion of the electrochromic film. Since the edge is provided with a multi-electrode structure, when the first lead-out structure and the second lead-out structure are energized, the current of the film diffuses from the surroundings to the central area of ​​the film, and compared with the case of single-sided wiring, the speed of current diffusion is increased, thereby increasing the color change speed of the film and reducing the color change time.

[0098] Of course, in other embodiments, for example Figure 4 The edge portion of the first substrate layer 210 and the edge portion of the second substrate layer 220 can extend in opposite directions, that is, relative to the plane where the electrochromic film is located, the first conductive substrate 210 and the second conductive substrate 220 extend in the X direction or the -X direction respectively, so that their projections do not overlap at all.

[0099] In one embodiment, a ratio of a total length of all straight edge portions to a total length of all corner portions is equal to a ratio of a signal value of the first control signal to a signal value of the second control signal.

[0100] In the embodiments of the present application, the straight-edge electrodes and the corner electrodes are independently controlled mainly by adjusting the magnitudes of the first control signal and the second control signal. Specifically, if the total length of each straight-edge part is m and the total length of the corner part is n, and their ratio is m:n; then the signal value of the first control signal input to the straight-edge part is m, that is, the magnitude of the current input to the straight-edge part is m milliamperes, and the signal value of the second control signal correspondingly input to the corner part, that is, the magnitude of the current input to the corner part is n milliamperes, and preferably n < m. In this embodiment, the ratio of the signal value of the first control signal to the signal value of the second control signal is equal to the ratio of the total length of the straight-edge part to the total length of the corner part. The current conducts along its respective electrode and diffuses inward, and the magnitude of the input current is equal to the ratio of the lengths of the electrodes, so that the current diffused to each region is more uniform, making the electric field intensity of the entire diaphragm more balanced, and thus avoiding the premature failure of other regions. In addition, it is also necessary to monitor the magnitudes of the signal values corresponding to the corner electrodes and the straight-edge electrodes. When the magnitude of the second control signal corresponding to the corner electrode and the magnitude of the first control signal corresponding to the straight-edge electrode are at a preset value, the control stops outputting the second control signal to the corner electrode.

[0101] Preferably, when both the first control signal and the second control signal are voltage signals, the signal value of the first control signal is greater than the signal value of the second control signal at this time. Assume that the signal value of the first control signal is V1 and the signal value of the second control signal is V2; the ratio of V1 to V2 is determined according to the ratio of the area enclosed by the straight-edge part and the area enclosed by the corner part. Specifically, if the total length of each straight-edge electrode is m and the total length of the corner electrode is n, and their ratio is m:n; then the signal value of the first control signal corresponding to the straight-edge electrode is m, such as the magnitude of the voltage applied to the straight-edge part is m volts, and the signal value of the second control signal correspondingly input to the corner electrode, such as the magnitude of the voltage applied to the corner part is n volts, and preferably n < m. In this embodiment, the ratio of the signal value of the first control signal to the signal value of the second control signal is equal to the ratio of the straight-edge electrode to the corner electrode, making the electric field intensity and the effective voltage more balanced during the charge and discharge process of the entire diaphragm, and thus avoiding the premature failure of some regions of the diaphragm. In addition, it is also necessary to monitor the magnitudes of the signal values corresponding to the corner electrodes and the straight-edge electrodes. When the difference between the magnitude of the second control signal corresponding to the corner electrode and the magnitude of the first control signal corresponding to the straight-edge electrode is at a preset value, the control stops outputting the second control signal to the corner electrode.

[0102] Preferably, when the first control signal and the second control signal are both charge amounts, illustratively, the charge amount Q that needs to be charged into the electrochromic film is calculated through the dimming signal, and Q is distributed to the first lead-out structure Q1 and the second lead-out structure Q2, Q=Q1+Q2, where Q1>Q2. That is to say, the charge amount input to Q1 of the straight edge portion is controlled, and then the charge amount input to Q2 of the straight edge portion is controlled, and at this time, the current and voltage applied to the straight edge portion and the corner portion are equal. In this embodiment, by inputting a smaller charge amount to the corner portion, Q2 input through the straight edge portion is finally diffused to the corner area, and finally the charge amount of the entire diaphragm is uniform, and a smaller charge amount is input to the corner portion. During the charging process, the electric field strength received by the corner area is smaller than the electric field strength received by the straight edge electrode, thereby effectively alleviating corner failure.

[0103] Preferably, when the first control signal and the second control signal are time signals, the magnitude of the impact on the corner and the straight edge can be changed by changing the power-on time. The time signal can be a length of time or a sequence of time. For example, the straight edge can be charged by applying a current signal / voltage signal or the like through the first lead-out structure, and after a certain preset time, the corner can be charged through the second lead-out structure. By charging the straight edge first, the electric field of the straight edge reaches a certain intensity first, and then the corner is charged. At this time, the electric field of the corner is gradually enhanced. Since the corner starts charging and discharging later than the straight edge, the field strength of the corner area during the charging process is smaller than that of the non-corner area, thereby effectively alleviating the technical problem of failure of the corner of the electrochromic film. Alternatively, the straight edge is charged for a first preset time through the first lead-out structure, and the corner is charged for a second preset time through the second lead-out structure, wherein the first preset time is greater than the second preset time. In other words, the straight edge and the corner are charged and discharged at the same time, but the charging and discharging of the corner ends earlier than the straight edge. Since the electrochromic film charges and discharges slowly, it takes a long time to complete the charging and discharging of the entire film; the electrochromic film is charged and discharged at the same time. At the beginning of the charging and discharging, the electric field strength of the entire electrochromic film is 0, and each part begins to change, while the charging and discharging of the corner area ends in advance, and the field strength change in the corner area ends in advance. Finally, the current charged in the straight edge part diffuses to the corner area, and finally reaches the balance of the entire film. The electrochromic film starts to change color at the same time, and the field strength of the corner part is smaller before the color change is completed, thereby effectively alleviating the failure of the corner.

[0104] Preferably, based on any of the above embodiments, the ratio of the length of the corner electrode to the total length of the straight-edge electrode is between 1:10 and 1:2, and the preferred ratio of the length of the corner electrode to the length of the straight-edge electrode is 1:10. Since the second control signal for controlling the corner electrode is smaller than the first control signal value, the color change speed of the corresponding corner electrode will be smaller than that of the straight-edge electrode. Therefore, if the corner electrode is too long, it will affect the color change speed of the entire electrochromic film, while if it is too short, it will not be able to effectively prevent the corner failure of the electrochromic film; therefore, setting the corner electrode in a suitable range can effectively prevent corner failure while ensuring the color change speed of the film, thereby improving the user experience.

[0105] Preferably, based on any of the above embodiments, further improvements are made, wherein the corner electrodes with the same polarity are connected in series and electrically connected to the controller, and / or the straight-edge electrodes with the same polarity are connected in series and electrically connected to the controller. In this embodiment, the corner electrodes with the same polarity are connected in series through bus bars and electrically connected to the controller, that is, the corner electrodes of the same conductive layer are connected in series and electrically connected to the second lead-out structure; the straight-edge electrodes with the same polarity are connected in series through another bus bar and electrically connected to the controller, that is, the straight-edge electrodes of the same conductive layer are connected in series and electrically connected to the first lead-out structure; usually a diaphragm has multiple corners, and the polarity corresponding to each corner may be the same or different. By connecting all the corner electrodes with the same polarity in series, at most only two FPCs are needed to connect all the corner electrodes, and there is no need to set up FPC leads for each corner electrode, making the structure of the entire diaphragm simpler and more compact.

[0106] For example, see Fig. 9 and Fig.10 , Fig. 9 A structural schematic diagram of a viewing angle of an implementation of an electrochromic film provided in some embodiments of the present application is shown; Fig.10 Shows Figure 2 The first lead-out structure 131 also includes a fifth FPC 131c and a sixth FPC 131d, and the second lead-out structure 132 also includes a seventh FPC 132c and an eighth FPC 132d. Fig. 9 As shown, the second corner electrodes 122b are connected in series and then electrically connected to the seventh FPC 132c, and the second straight edge electrodes 121b are connected in series and then electrically connected to the fifth FPC 131c. Fig.10 As shown, the first corner electrodes 122a can be connected in series and then electrically connected to the eighth FPC 132d, and the first straight edge electrodes 121a can be connected in series and then electrically connected to the sixth FPC 131d.

[0107] Preferably, based on any of the above embodiments, further improvements are made. In one implementation, see Figure 4 The electrochromic device further includes a first bus bar 240 and a second bus bar 250, wherein the first bus bar 240 is electrically connected to the first lead-out structure 131, and the second bus bar 250 is electrically connected to the second lead-out structure 132; the second bus bar is electrically connected to the straight-edge electrodes with the same polarity; and the first bus bar is electrically connected to the corner electrodes with the same polarity. In this way, it is possible to achieve that straight-edge electrodes or corner electrodes with different polarities correspond to different bus bars, and the signal type and signal value of each electrode input can be controlled in real time according to the current usage.

[0108] Ways to connect corner electrodes with the same polarity in series include but are not limited to the following ways: The first way: affix a first bus bar along the edge of the electrochromic film, and set an insulating layer at the corner electrode corresponding to the first bus bar to isolate the first bus bar from direct contact with the corner electrode, until all straight-edge electrodes with the same polarity are connected in series. Connect the corner electrodes with the same polarity in series, and similarly, affix a second bus bar corresponding to the straight-edge electrodes. The second way: set a corner bus bar at the corresponding corner electrode, set a straight-edge bus bar corresponding to each straight-edge electrode, lead out each corner electrode with the same polarity and the corner bus bar with the same polarity respectively, and then connect the corresponding lead-out structures in series and electrically connect them to the controller.

[0109] Preferably, based on any of the above embodiments, each straight-edge electrode is electrically connected to the controller independently, and / or each corner electrode with the same electrical properties is electrically connected to the controller independently. In this embodiment, a bus bar is provided for each corner electrode, and each bus bar is individually connected to the FPC lead and electrically connected to the controller. For example, see Fig. 9 and Fig.10 The first corner electrode 122a is led out through the eighth FPC 132d, and the second corner electrode 122b is led out through the seventh FPC 132c; the first straight electrode 121a is led out through the sixth FPC 131d, and the second straight electrode 121b is led out through the fifth FPC 131c. This achieves separate control of corner electrodes of different polarities. A single electrode is led out separately, which is convenient for controlling a single electrode. During use, the amount of electricity input to each electrode can be controlled in real time according to the current usage.

[0110] In one embodiment, the total length of the corner portion is less than the total length of the straight edge portion. In this embodiment, since the signal value of the second control signal for controlling the corner electrode is small, the color change speed at the corresponding corner position is also slow, so the length of the corner electrode at this position is set to be small, that is, the area with a slow color change speed is relatively reduced, and overall, the color change speed of the membrane is increased.

[0111] Specifically, in some embodiments, the ratio of the total length of the straight edge portion to the total length of the corner portion is equal to the ratio of the signal value of the first control signal to the signal value of the second control signal. This setting can make the electric field of the straight edge portion and the corner portion closer, so that the electric field of the entire diaphragm is in a relatively balanced state, and will not cause part of the diaphragm to be overcharged or over-discharged for a long time; it solves the technical problem of premature failure of the corner area of ​​the electrochromic diaphragm in the prior art, and has the advantages of uniform color change and long life.

[0112] In addition, the corner electrode also includes a first side and a second side, the length of the first side is greater than the length of the second side; the electrochromic film includes a long side and a short side; the first side of the corner electrode extends along the longer side of the film, and the second side extends along the shorter side of the film, and the shape of the corner electrode is set to be similar to the shape of the film, making the entire structure more compact.

[0113] It is worth noting that the features of the above-mentioned embodiments of the present application can be arbitrarily combined to form a new technical solution. For example, in the signal value of the first control signal, the current and voltage are greater than the current and voltage of the signal value of the second control signal.

[0114] Another aspect of the present application embodiment provides a control method for an electrochromic device, which is used to control the electrochromic device described in any of the above embodiments. Mainly for large-area color-changing devices, the control method is combined with the structure of the electrochromic device to make the color change degree of the corner area smaller than that of the non-corner area during the color change process, effectively preventing the failure of the diaphragm corner and increasing the service life of the diaphragm; the technical problem of uneven color change in the prior art is solved, so that the electrochromic device has a uniform color change effect.

[0115] For details, see Fig.11 , the method comprising:

[0116] Step S610, obtaining a dimming signal of the electrochromic device;

[0117] The control command is determined according to the dimming signal. The dimming signal of the electrochromic device can be a command information sent by manual operation, or a control command generated by the controller according to the environmental signal. For example, the light intensity of the environment and the current transmittance information of the current electrochromic device are obtained to automatically generate the dimming signal of the electrochromic device. The dimming signal includes at least one of the following: the current gear information of the electrochromic device, the target gear information, the target transmittance and the charging time.

[0118] Step S620, outputting a first control signal to the first lead-out structure according to the dimming signal control, and outputting a second control signal to the second lead-out structure according to the dimming signal control; wherein the signal value of the first control signal is greater than the signal value of the second control signal, or the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal.

[0119] The first control signal corresponds to controlling the straight edge portion, and the second control signal corresponds to controlling the corner portion. In some embodiments, the first control signal includes: at least one of a current signal, a charge amount, a voltage signal, and a time signal; the second control signal includes: at least one of a current signal, a charge amount, a voltage signal, and a time signal. Preferably, the first control signal is a first voltage value, the second control signal is a second voltage value, and the absolute value of the first voltage value is greater than the absolute value of the second voltage value.

[0120] Exemplarily, the amount of electricity or voltage that needs to be charged into the electrochromic device is calculated based on the dimming signal. The specific calculation method can refer to any one of the prior art. The magnitude of the applied current or driving voltage is calculated based on the amount of electricity or the open-circuit voltage, so as to control the signal value of the output second control signal to be smaller than the signal value of the first control signal, so that the corner portion is always less affected than the straight edge portion; and because the conductive layer itself has resistance that causes a voltage drop, even if the two sides of the corner portion overlap in the corner area of ​​the diaphragm, the overlapped portion is not affected too much by the resistance of the conductive layer itself, so that the corner portion is always less affected than the straight edge portion, so that the corner area will not be much higher than the straight edge portion as in the prior art. Therefore, the phenomenon of overcharging or over-discharging in the corner area is reduced, and the possibility of failure in the corner area is reduced.

[0121] In some embodiments, the control of outputting the second control signal to the second lead-out structure according to the dimming signal includes: obtaining the target open-circuit voltage OCV corresponding to the dimming signal. The second control signal is output to the second lead-out structure according to the target open-circuit voltage OCV, wherein the absolute value of the voltage value of the second control signal is less than or equal to the absolute value of the target open-circuit voltage OCV; exemplarily, the dimming signal is controlled to be adjusted to the first target gear, and the target open-circuit voltage corresponding to the first target gear is OCV1. At this time, the voltage of the input corner part is controlled to be OCV1 or a voltage with an absolute value less than OCV1. The corner part is charged with a low voltage. Compared with the method of the voltage with an absolute value higher than the target OCV in the prior art, the corner part will not be overcharged or over-discharged, and due to the superposition of the field strength at the corner position, the color change speed of the corner part will also be accelerated, so that it can be effectively guaranteed. At the same time, it can also effectively alleviate corner failure.

[0122] In addition, the target gear of the electrochromic device, the target OCV corresponding to the target gear, and the current gear information can be obtained, and the target OCV to be supplemented is calculated according to the target gear and the target OCV, and the voltage of the input corner part is controlled according to the OCV to be supplemented. Exemplarily, the specific supplemented OCV is the size of OCV2, and the voltage size whose absolute value is less than the absolute value of the supplemented value is input, and the problem of corner failure is effectively alleviated by charging with a small voltage.

[0123] In some embodiments, the method further includes: obtaining a current value of the first lead-out structure, and when the current of the first lead-out structure is less than a first preset current value, controlling to stop outputting the first control signal to the first lead-out structure.

[0124] The method further includes: obtaining the current magnitude of the first lead-out structure, and when the current of the first lead-out structure is less than a second preset current value, controlling to stop outputting the second control signal to the second lead-out structure.

[0125] In this embodiment, by testing the current size of the first lead-out structure, the current charge and discharge degree can be indirectly reflected. Therefore, the charge and discharge of the second lead-out structure and the first lead-out structure can be cut off by the current size of the straight edge part, so as to effectively prevent corner failure and accurately control the corner discoloration. Generally speaking, the current change during the charge and discharge process of the electrochromic device first increases, then gradually decreases after reaching the peak value, and finally tends to be stable. The first preset current value is greater than the second preset current value, that is, the second lead-out structure ends the charge and discharge first. Exemplarily, when it is detected that the current value of the first lead-out structure is less than 600 mA, the control stops outputting the second control signal to the second lead-out structure to avoid corner failure. At this time, the first control signal is not stopped from being input to the first lead-out structure until the current value of the first lead-out structure is less than 300 mA, and the input of the electrical signal to the first lead-out structure is stopped.

[0126] In some embodiments, the method further includes: obtaining the current size of the second lead-out structure, and when the current of the second lead-out structure is greater than a first preset threshold, controlling to stop outputting the second control signal; wherein the first preset threshold is the safety current of the electrochromic device; the safety current refers to the safety current that damages the electrochromic device, and damage means short circuit, failure, etc., that is, the current value that causes an irreversible chemical reaction in the material of the electrochromic layer. The size of the safety current value can be set artificially, and the safety current value of the same electrochromic device is obtained by calculation or empirical value, and applied to the corresponding electrochromic device. Exemplarily, when the safety current of the electrochromic device is 800 mA, when the safety current of the second lead-out structure is tested to be greater than 800 mA, the corner is controlled to stop charging and discharging to avoid the corner part being affected and failing.

[0127] Or when the current of the second lead-out structure is less than or equal to the second preset threshold, the control stops outputting the second control signal; the second preset threshold is the theoretical stable current of the electrochromic device when it is fully charged or fully discharged. For example, if the theoretical stable current of the target gear is 300 mA, when the current of the second lead-out structure is less than or equal to 300 mA, it means that the corner area is fully charged or fully discharged at this time, then the control stops inputting the second control signal value to avoid failure due to overcharging or over-discharging of the corner area.

[0128] In some embodiments, see Fig.12 , the method further comprises:

[0129] Step S730, obtain the ratio s of the total length of the straight edge part to the total length of the corner part; control the output of the first control signal and the second control signal, wherein the ratio of the signal value of the first control signal to the signal value of the second control signal is equal to s. When the control signal for controlling the color change of the electrochromic film is output to the electrochromic film, since the signal value of the second control signal is less than the signal value of the first control signal, the superposition effect of the control signals on both sides on the corner area of ​​the electrochromic film will also be smaller than that of the prior art, thereby alleviating the failure of the corner of the film. In addition, by controlling the signal value of the first control signal and the signal value of the second control signal, the electric field received by the straight edge part is closer, and the electric field of the entire film is in a relatively balanced state, which will not cause partial areas of the film to be overcharged or over-discharged for a long time; the technical problem of premature failure of the corner area of ​​the electrochromic film in the prior art is solved, and it has the advantages of uniform color change and long life.

[0130] Preferably, on the basis of the above embodiments, a further improvement is made. Both the first control signal and the second control signal are current signals, and / or both are voltage signals. That is to say, the current or voltage for controlling the driving of the corner part is smaller than the current and / or voltage input to the straight-edge part. When both the first control signal and the second control signal are current signals, that is, the current input to the straight-edge part is larger than the current input to the corner part. At this time, the current in the straight-edge part conducts from the straight-edge part of the edge part to the central part. Due to the voltage drop in the conductive layer, the current in the edge part is usually larger. In the corner area, due to the influence of both sides, the currents on both sides diffuse into the corner area and there is superposition, which will play a strengthening role in the corner area. Since the current input to the corner part is small, and there is a voltage drop in the conductive layer, the currents on both sides will not be superposed too much at the overlapping part. Therefore, the current magnitude in the corner area is relatively close to the current magnitude at the straight edge, thus playing a more balanced role and reducing the technical problem of premature failure in the corner area of the entire diaphragm. In addition, since the current is relatively easy to monitor as a control signal, the current magnitude at this place can be detected in real time, so it is easier to control the current magnitudes of the corner part and the straight-edge part, making the control method simpler.

[0131] Specifically, if the total length of each straight-edge part is m and the total length of the corner part is n, and the ratio of the straight-edge part to the corner part is m:n; then the signal value of the first control signal corresponding to the straight-edge electrode is m, the current magnitude input to the straight-edge part is m milliamperes, the signal value of the second control signal corresponding to the corner electrode is input, and the current input to the corner part is n milliamperes. Preferably, n < m. In this embodiment, the ratio of the signal values of the first control signal and the second control signal is equal to the ratio of the straight-edge electrode and the corner electrode. The current conducts along their respective electrodes and diffuses into the central area of the diaphragm. The current magnitude input is equal to the length ratio of the electrodes, so the current diffused into each area is more uniform, making the electric field intensity of the entire diaphragm more balanced, and thus avoiding premature failure in other areas. In addition, it is also necessary to monitor the signal value magnitudes corresponding to the corner electrode and the straight-edge electrode. When the signal value magnitude of the second control signal corresponding to the corner electrode and the signal value magnitude of the first control signal corresponding to the straight-edge electrode are within the preset value, then the control stops outputting the second control signal to the corner electrode.

[0132] Preferably, when both the first control signal and the second control signal are voltage signals, the signal value of the first control signal is greater than that of the second control signal at this time. Assume that the signal value of the first control signal is V1 and the signal value of the second control signal is V2; the ratio of V1 to V2 is determined according to the ratio of the area enclosed by the straight-edge electrodes and the area enclosed by the corner electrodes. Specifically, if the total length of each straight-edge electrode is m and the total length of the corner electrode is n, and their ratio is m:n; then the signal value of the first control signal corresponding to the straight-edge electrode is m, such as the voltage applied to the straight-edge part is m volts, and the signal value of the second control signal corresponding to the corner electrode is input, such as the voltage applied to the corner part is n volts. Preferably, n < m. In this embodiment, the ratio of the signal value of the first control signal to the signal value of the second control signal is made equal to the ratio s of the straight-edge electrode to the corner electrode, so that the electric field strength of the entire diaphragm is more balanced, thereby avoiding premature failure in other regions.

[0133] Preferably, when both the first control signal and the second control signal are electric charges, for example, through a dimming signal, the amount of electric charge Q that needs to be charged into the electrochromic diaphragm is calculated, and Q is distributed to the first lead structure and the second lead structure, that is, Q1 is distributed to the first lead structure and Q2 is distributed to the second lead structure, Q = Q1 + Q2, where Q1 > Q2. That is to say, the amount of electric charge Q1 is controlled to be input to the straight-edge part, and the amount of electric charge Q2 is input to the straight-edge part. Preferably, in this embodiment, a smaller amount of electric charge can be input to the corner part, and finally the Q2 input through the straight-edge part diffuses to the corner area, so that the electric charge of the entire diaphragm is uniform. A smaller amount of electric charge is input to the corner part, and during the charging process, the electric field strength received by the corner area is smaller than that received by the straight-edge electrode, thereby effectively alleviating corner failure.

[0134] Preferably, when the first control signal and the second control signal are time signals, the magnitude of the impact on the corner and the straight edge can be changed by changing the power-on time. The time signal can be a time length or a time sequence. For example, the straight edge can be charged by applying a current signal / voltage signal or the like through the first lead-out structure, and after a certain preset time, the corner can be charged through the second lead-out structure. By charging the straight edge first, the electric field of the straight edge reaches a certain intensity first, and then the corner is charged. At this time, the electric field of the corner is gradually enhanced. Since the corner starts charging and discharging later than the straight edge, the field strength of the corner is smaller than that of the straight edge, thereby effectively alleviating the technical problem of failure of the corner of the electrochromic film. Alternatively, the straight edge is charged for a first preset time through the first lead-out structure, and the corner is charged for a second preset time through the second lead-out structure, wherein the first preset time is greater than the second preset time. In other words, the straight edge and the corner are charged and discharged at the same time, but the charging and discharging of the corner ends earlier than the straight edge. Since the electrochromic film charges and discharges slowly, it takes a long time to complete the charging and discharging of the entire film; the electrochromic film is charged and discharged at the same time. At the beginning of charging and discharging, the electric field strength of the entire electrochromic film changes to 0, and each part begins to change, while the charging and discharging of the corner area ends in advance, and the field strength change in the corner area ends in advance. Finally, the current charged in the straight edge part diffuses to the corner area, and finally reaches the balance of the entire film. The electrochromic film starts to change color at the same time, and the field strength of the corner part is smaller before the color change is completed, thereby effectively alleviating the failure of the corner. This can avoid failure caused by overcharging or over-discharging of the corner part, and at the same time improve the stability and uniformity of the electric field strength of the electrochromic film, and improve the service life of the electrochromic film.

[0135] When the first control signal and the second control signal are both charge amounts. The charge amount Q1 on the first lead-out structure and the charge amount Q2 on the second lead-out structure can be calculated by integrating the current of the first lead-out structure and the second lead-out structure, respectively. When the charge amount on the first lead-out structure or the second lead-out structure reaches or exceeds the preset signal threshold, the charge input to the first lead-out structure or the second lead-out structure is stopped. Similarly, this is also to prevent overcharging or over-discharging of each part, thereby avoiding damage to the device. In addition, the first preset signal threshold is greater than the second preset signal threshold, so that the charge amount on the corner part is always less than the charge amount on the straight edge part during the charging and discharging process, so that the electric field strength received by the corner area is smaller, thereby effectively preventing the corner of the electrochromic film from failing. Preferably, when the amount of electricity input to the second lead-out structure by the controller reaches a preset value, the amount of electricity input to the second lead-out structure is stopped, and the corresponding amount of electricity indicates that the target transmittance will be reached at this charge amount, and the end point will be reached. In addition, when the control signal is a charge signal, the charge detection can calculate the charge that has been input into the corner part (straight edge part) in real time according to a preset frequency within a preset time, and determine whether the charge of the corner part (straight edge part) is greater than the second preset signal threshold (first preset signal threshold). If it is greater than the preset signal threshold, stop in time to avoid excessive charge causing the area corresponding to the electrochromic device to be subjected to a large field strength, thereby effectively alleviating the problem of failure of the electrochromic device.

[0136] When the first control signal and the second control signal are both time, the time for charging the first lead-out structure and the second lead-out structure is monitored or recorded in real time. When the charging time on the first lead-out structure or the second lead-out structure reaches or exceeds the preset signal threshold, charging them is stopped. This is to prevent overcharging or over-discharging of each part, thereby avoiding damage to the device. In addition, the first preset signal threshold is greater than the second preset signal threshold, and the charging time for the first lead-out structure can be greater than the charging time for the second lead-out structure. For example, the current to the corner electrode can be stopped first, and finally the current on the straight edge electrode is diffused to the corner area, so that the entire color-changing film can achieve a uniform transmittance within the visible range.

[0137] In some embodiments, the method further includes: obtaining a signal difference between the first control signal and the second control signal; when the signal difference is less than a third preset threshold, stopping outputting the second control signal. The third preset threshold is also a preset value set according to the actual working condition of the electrochromic film. By monitoring the signal difference between the first control signal and the second control signal, when the signal difference is less than the third preset threshold, it indicates that the bearing capacity of the corner area of ​​the electrochromic film has reached the maximum limit. At this time, it is necessary to stop charging the corner part to ensure that the electrochromic corner part will not be overcharged or over-discharged.

[0138] The charging time and current cut-off method include: when it is determined that the current difference between the corner part and the straight edge part is at a preset threshold, the second control signal is stopped from being output, that is, the corner part is controlled to be powered off.

[0139] Preferably, before the electrochromic film completes the color change, the second control signal is stopped from being input to the second lead-out structure. In the embodiment of the present application, the charging and discharging to the corner electrode can be stopped first, and finally the voltage on the straight-edge electrode is higher and diffused to the corner area, so that the entire color-changing film can achieve uniform transmittance within the visible range, providing a good user experience while ensuring that the electric field strength in the corner area is not too high during the charging and discharging process, effectively alleviating the premature failure of the corner area of ​​the electrochromic film.

[0140] In summary, the control method of the electrochromic device provided in the embodiment of the present application can be combined with the first lead-out structure to separately control the straight edge part, and combined with the second lead-out structure to separately control the corner part, and the electric field strength received by the corner area is smaller by controlling the size of each control signal. By applying a smaller control signal value to the corner part, the aging and failure problems caused by overcharging and overdischarging in the corner are avoided, the loss of the electrochromic film is reduced, and the service life of the electrochromic film is increased; at the same time, the electrochromic film can also be made to change color evenly.

[0141] See also Fig.13 Some embodiments of the present application also provide a color-changing device, including a substrate layer (540, 550) and an electrochromic film as described in any of the above embodiments stacked with the substrate layer (540, 550). The color-changing device can be any one of a car's skylight, a building curtain wall, a rearview mirror, and an electrochromic device housing. The electrochromic film in the color-changing device includes a first substrate layer 210, a first conductive layer 140, an electrochromic stacked layer 230, a second conductive layer 150, and a second substrate layer 220 stacked in sequence.

[0142] The substrate layer is made of a transparent material, 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 can also be sandwiched between the two substrate layers, and an adhesive such as PVB or OCA is provided between the electrochromic film and the substrate layer. At the peripheral edge of the electrochromic film, the edge of the electrochromic film is sealed by a sealant 530, and the two substrate layers are connected by the sealant 530 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).

[0143] In addition, the sealant 530 can not only form a bond between the two substrate layers and the electrochromic film, but also seal the electrochromic film to isolate oxygen and air, preventing the electrochromic film from contacting with external moisture and oxygen, thereby increasing the service life of the electrochromic film and the service life of the color-changing device.

[0144] In addition, shielding layers 510 and 520 are respectively provided on the inner surfaces of the substrate layer 540 and the substrate layer 550 corresponding to the edge of the electrochromic film. In order to prevent the user from directly seeing the edge of the electrochromic film through the transparent substrate layer, a shielding layer is provided at the edge of the substrate layer, and the busbars (560, 570) and the barrier portion at the edge of the electrochromic film 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.

[0145] Preferably, another aspect of the embodiment of the present application further provides a terminal product, including the electrochromic film as described in any one of the above claims 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 or color changing device is used, it has all the advantages of the above color changing film and color changing device. It has the effect of reducing the risk of corner failure and extending the life of the product.

[0146] Some embodiments of the present application further provide a processor, wherein the processor is used to execute any of the above methods for controlling an electrochromic device.

[0147] Some embodiments of the present application also provide a computer storage medium storing a computer program, wherein the computer program, when running on the processor, executes the control method of the electrochromic device as described in any of the above embodiments. The computer storage medium may be a ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for enabling a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the method described in any of the embodiments of the present application.

[0148] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or terminal including the element.

[0149] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose and protection scope of the present application, all of which are within the protection of the present application.

Claims

1. An electrochromic device, characterized in that: include: Electrochromic film; The edge portion of the electrochromic film includes a straight edge portion and a corner portion, the straight edge portion is provided with a first lead-out structure, and the corner portion is provided with a second lead-out structure; the first lead-out structure and the second lead-out structure are both used to transmit electrical signals to the electrochromic film separately, and the first lead-out structure and the second lead-out structure are respectively used to be electrically connected to a power source.

2. The electrochromic device according to claim 1, characterized in that: The electrochromic device also includes: a controller for controlling the color change of the electrochromic film, the controller is used to output a first control signal to the first lead-out structure, and output a second control signal to the second lead-out structure, wherein the signal value of the first control signal is greater than the signal value of the second control signal, or the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal.

3. The electrochromic device according to claim 2, characterized in that: The first control signal is a first voltage value, the second control signal is a second voltage value, and an absolute value of the first voltage value is greater than an absolute value of the second voltage value.

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

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

6. The electrochromic device according to claim 2, characterized in that: The total length of the corner portion is smaller than the total length of the straight side portion.

7. The electrochromic device according to claim 2, characterized in that: A ratio of a total length of the straight edge portion to a total length of the corner portion is equal to a ratio of signal values ​​of the first control signal to the second control signal.

8. The electrochromic device according to claim 1, characterized in that: The electrochromic device further comprises: a controller for controlling the color change of the electrochromic film; The straight edge portion includes a straight edge electrode, which is electrically connected to the controller via the first lead-out structure, and / or the corner portion includes a corner electrode, which is electrically connected to the controller via the second lead-out structure.

9. The electrochromic device according to claim 8, characterized in that: The electrochromic device further includes a first bus bar and a second bus bar, the first bus bar is electrically connected to the first lead-out structure, and the second bus bar is electrically connected to the second lead-out structure; The first bus bar is electrically connected to the straight-edge electrodes with the same polarity; The second bus bar electrically connects the corner electrodes having the same polarity.

10. The electrochromic device according to claim 8, characterized in that: Each of the straight-edge electrodes is electrically connected to the controller independently, and / or each of the corner electrodes with the same electrical properties is electrically connected to the controller independently.

11. A control method for an electrochromic device, characterized in that: The electrochromic device comprises an electrochromic film, the edge portion of the electrochromic film comprises a straight edge portion and a corner portion, the straight edge portion is provided with a first lead-out structure, and the corner portion is provided with a second lead-out structure, and the method comprises: Obtaining a dimming signal of an electrochromic device; Controlling output of a first control signal to the first lead-out structure according to the dimming signal, and controlling output of a second control signal to the second lead-out structure according to the dimming signal; The signal value of the first control signal is greater than the signal value of the second control signal, or the signal value of the first control signal is equal to the signal value of the second control signal and the time for outputting the first control signal is greater than the time for outputting the second control signal.

12. The method according to claim 11, characterized in that The step of controlling the output of the second control signal to the second lead-out structure according to the dimming signal comprises: Get the target open circuit voltage OCV corresponding to the dimming signal, The second control signal is output to the second lead-out structure according to the target open circuit voltage OCV, wherein an absolute value of a voltage value of the second control signal is less than or equal to an absolute value of the target open circuit voltage OCV.

13. The method according to claim 12, characterized in that The method further includes: obtaining the current magnitude of the first lead-out structure, and when the current of the first lead-out structure is less than a preset current value, controlling to stop outputting the second control signal to the second lead-out structure.

14. The method according to claim 11, characterized in that The method further comprises: Obtain the current size of the second lead-out structure, and when the current of the second lead-out structure is greater than a first preset threshold, control to stop outputting the second control signal; or when the current of the second lead-out structure is less than or equal to the second preset threshold, control to stop outputting the second control signal; wherein, the first preset threshold is the safe current of the electrochromic device, and the second preset threshold is the theoretical stable current of the electrochromic device when fully charged or fully discharged.

15. The method according to claim 11, characterized in that The method further comprises: Get the ratio s of the total length of the straight edge portion to the total length of the corner portion; The first control signal and the second control signal are controlled to be output, wherein the ratio of the signal values ​​of the first control signal and the second control signal is equal to s.

16. A color changing device, characterized in that: The electrochromic device according to any one of claims 1 to 15 comprises a substrate layer and the substrate layer stacked on top of the substrate layer.

17. A terminal product, characterized in that: It comprises the electrochromic device as described in any one of claims 1 to 10 or the color-changing device as described in claim 16, wherein the terminal product comprises any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, a housing of an electronic product, glasses, a vehicle and a display panel.

18. A processor, characterized in that: The processor is used to execute the control method of the electrochromic device according to any one of claims 11 to 15.

19. A computer storage medium, characterized in that: The device stores a computer program, which, when running on a processor, executes the control method of the electrochromic device according to any one of claims 11 to 15.

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