Electrochromic device and terminal product

Abstract

The application discloses an electrochromic device and a terminal product, and relates to the technical field of electrochromic technology. The electrochromic device comprises an electrochromic layer, a first conductive layer and a first composite substrate layer. The first conductive layer is arranged on the electrochromic layer, and the first conductive layer comprises a first conductive part and a second conductive part which are separated by an insulating area with a closed contour line. The first composite substrate layer is arranged on the side of the first conductive layer away from the electrochromic layer, and the first composite substrate layer comprises a first insulating substrate and a first conduction structure embedded in the first insulating substrate. The first conductive part and the second conductive part are electrically connected with the first conduction structure respectively. The electrochromic device provided by the application can realize multi-region linkage color change by using closed pattern partition.

Description

Technical Field

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

[0002] Electrochromic devices are smart material devices that can change their optical properties by applying voltage, and are widely used in fields such as smart windows, display devices, and energy-saving buildings.

[0003] Electrochromic devices typically use transparent conductive oxide materials, such as indium tin oxide (ITO), as the transparent conductive layer. This transparent conductive layer is generally a continuous structure, making it difficult to achieve electrical isolation between multiple independent regions on the device. Consequently, it is difficult to independently control the electrochromic behavior of different regions, thus limiting the application of electrochromic devices. Utility Model Content

[0004] In view of this, this application provides an electrochromic device and end product, which aims to solve one of the technical problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, this application provides an electrochromic device, comprising: Electrochromic layer; A first conductive layer is disposed on the electrochromic layer, the first conductive layer comprising a first conductive portion and a second conductive portion separated by an insulating region having a closed outline; A first composite substrate layer is disposed on the side of the first conductive layer away from the electrochromic layer. The first composite substrate layer includes a first insulating substrate and a first conductive structure embedded in the first insulating substrate. The first conductive portion and the second conductive portion are respectively electrically connected to the first conductive structure.

[0006] In an optional embodiment, the thickness of the first conductive structure is less than the thickness of the first insulating substrate; and / or The thickness of the first insulating substrate is equal to the thickness of the first composite substrate layer; and / or The end face of the first conductive structure facing the electrochromic layer is flush with the end face of the first insulating substrate facing the electrochromic layer.

[0007] In an optional embodiment, the conductivity of the first conductive structure is greater than the conductivity of the first conductive portion and the conductivity of the second conductive portion.

[0008] In an optional embodiment, the first conductive structure includes a first electrical connection portion and a second electrical connection portion that are spaced apart from each other, one end of the first electrical connection portion is electrically connected to the first conductive portion, and one end of the second electrical connection portion is electrically connected to the second conductive portion. The first electrical connection portion and the second electrical connection portion are spaced apart in a direction parallel to the electrochromic layer; The region of the first insulating substrate located between the first electrical connection portion and the second electrical connection portion forms a groove with the opening facing the first conductive layer.

[0009] In an optional embodiment, the distance between the first electrical connection portion and the second electrical connection portion is D1, and the distance between the first conductive portion and the second conductive portion is D2, satisfying: 1≤D1 / D2≤2.

[0010] In an optional embodiment, the first conductive structure further includes a first conductive portion disposed at the bottom of the groove, and the other end of the first electrical connection portion and the other end of the second electrical connection portion are respectively electrically connected to the first conductive portion.

[0011] In an optional embodiment, the first conductive structure is a metal mesh layer, the sheet resistance of the first conductive part is 50-300MΩ / □, and the sheet resistance of both the first electrical connection part and the second electrical connection part is between 0.01-0.2Ω / □.

[0012] In an optional embodiment, the insulating region is a first partition groove that penetrates the first conductive layer along the thickness direction of the electrochromic layer, and along the thickness direction of the electrochromic layer, the projection of the first electrical connection portion is located within the projection of the first conductive portion and does not overlap with the projection of the first partition groove. Along the thickness direction of the electrochromic layer, the projection of the second electrical connection portion is located within the projection of the second conductive portion and does not overlap with the projection of the first partition groove; Along the thickness direction of the electrochromic layer, the projection of the first dividing groove is located within the projection of the first conductive portion and within the projection of the groove.

[0013] In an optional embodiment, the cross-section of the first partition groove is annular, both the first electrical connection portion and the second electrical connection portion are annular, and the second electrical connection portion is arranged around the outside of the first electrical connection portion. The outer diameter of the first electrical connection is smaller than the inner diameter of the first partition groove, and the inner diameter of the second electrical connection is larger than the outer diameter of the first partition groove.

[0014] In an optional embodiment, the contact area between the first electrical connection and the first conductive part is S1, the contact area between the second electrical connection and the second conductive part is S2, the cross-sectional area of ​​the first conductive part is S3, and the cross-sectional area of ​​the second conductive part is S4, satisfying at least one of the following: (S1+S2) / (S3+S4)>0.05; S1 < S3; S2 < S4.

[0015] In an optional embodiment, the first conductive portion includes a first sub-conductive portion and a second sub-conductive portion separated by an insulating region having a closed contour line, the first conductive structure is electrically connected to the second sub-conductive portion, and the first composite substrate layer further includes a second conductive structure, wherein: The second conductive structure and the first conductive structure are spaced apart, and the second conductive structure is electrically connected to the first sub-conductive part and the second sub-conductive part; or The second conductive structure is electrically connected to the first conductive structure and the first sub-conductive part.

[0016] In an optional implementation, the first conductive structure and the second conductive structure have different conductivities.

[0017] Secondly, this application provides a terminal product including the electrochromic device described in any of the foregoing embodiments, wherein the terminal product includes any one of a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, a housing of an electronic product, glasses, and a display panel of an electronic product.

[0018] Compared with the prior art, the beneficial effects of this application are: since the first conductive structure is conductive, the second conductive part and the first conductive part can be connected to achieve the function of zoned linkage color change, which is conducive to presenting richer patterns in electrochromic devices.

[0019] The electrical connection structure, in which the first conductive part and the second conductive part are electrically connected by the first conductive structure, is particularly suitable for situations where the first conductive part and the second conductive part are separated by a closed pattern. This solves the problem in related technologies where it is impossible to achieve coordinated color change of the first conductive part and the second conductive part separated by a completely closed pattern. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This illustration shows one of the schematic diagrams of the split structure of the first conductive layer and the first composite substrate layer of the electrochromic device in some embodiments of this application; Figure 2 This illustration shows one of the cross-sectional structural schematic diagrams of the electrochromic device in some embodiments of this application; Figure 3 A three-dimensional structural schematic diagram of the first conductive layer in some embodiments of this application is shown; Figure 4 This paper shows a three-dimensional cross-sectional schematic diagram of the first conductive layer and the first conductive structure in some embodiments of this application; Figure 5 This is shown as a second schematic diagram of the split structure of the first conductive layer and the first composite substrate layer of the electrochromic device in some embodiments of this application; Figure 6 This is shown as a second schematic diagram of the cross-sectional structure of an electrochromic device in some embodiments of this application; Figure 7 The third schematic diagram of the cross-sectional structure of the electrochromic device in some embodiments of this application is shown.

[0022] Key component symbols: 110 - Electrochromic layer; 120 - First conductive layer; 121 - First partition groove; 124 - Second partition groove; 122 - First conductive part; 123 - Second conductive part; 131 - First conductive structure; 1311 - First electrical connection part; 1312 - Second electrical connection part; 1313 - First conductive part; 1314 - Groove; 1221 - First sub-conductive part; 1222 - Second sub-conductive part; 132 - Second conductive structure; 1321 - Third electrical connection part; 1322 - Fourth electrical connection part; 1323 - Second conductive part; 130 - First composite substrate layer; 133 - First insulating substrate; 140 - Second conductive layer; 141 - Third partition groove; 142 - Third conductive part; 143 - Fourth conductive part; 150 - Second composite substrate layer; 151 - Third conductive structure; 152 - Second insulating substrate. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] like Figure 1 , Figure 2 and Figure 7 As shown, embodiments of this application provide an electrochromic device, mainly used in energy-saving windows, automotive rearview mirrors, display devices, mobile terminals, and other fields. The electrochromic device can be a flexible electrochromic film, or a dimming glass assembly formed by laminating two pieces of glass with the aforementioned flexible electrochromic film.

[0029] In one embodiment of this application, the electrochromic device includes an electrochromic layer 110, a first conductive layer 120, a second conductive layer 140, a first composite substrate layer 130, and a second composite substrate layer 150.

[0030] The working principle of the electrochromic device in this application is as follows: The first conductive layer 120 is electrically contacted with an external terminal (such as FPC bonding) via a busbar connected to it, and the second conductive layer 140 is electrically contacted with another external terminal (such as FPC bonding) via a busbar connected to it. Thus, by connecting a power source to the two external terminals, a voltage can be applied between the first conductive layer 120 and the second conductive layer 140, thereby changing the transmittance of the electrochromic device.

[0031] Traditional electrochromic devices typically have a continuous conductive layer (such as ITO), which causes the entire electrochromic device to change color synchronously, making it impossible to achieve zoned color changes.

[0032] In existing technologies, a portion of the transparent conductive layer is removed to create an insulating region. When the outline of the insulating region is a closed pattern, the area inside the insulating region is separated from the area outside the insulating region, making interconnected color changing impossible. When the outline of the insulating region is a non-closed pattern, the insulating region and the conductive layer are connected through the unclosed portion (i.e., at the outline gap), allowing the electrochromic device to achieve zoned, synchronized color changing when a voltage is applied to the conductive layer. However, this still cannot achieve the synchronized color changing of the completely closed insulating region when the outline of the insulating region is a closed pattern.

[0033] To address the aforementioned issues, in one embodiment of this application, a first conductive layer 120 is disposed on the surface of the electrochromic layer 110. The first conductive layer 120 includes a first conductive portion 122 and a second conductive portion 123 separated by an insulating region having a closed outline.

[0034] In some embodiments, the first conductive layer 120 is deposited with ITO material using a magnetron sputtering process, with a thickness of 80-150 nm and a sheet resistance of 15-30 Ω / □. Through-channels (e.g., through-electrodes) can be formed on the first conductive layer 120 by laser etching or chemical etching. Figure 1 The first dividing groove 121 shown forms an insulating region that electrically insulates the first conductive part 122 and the second conductive part 123 from each other.

[0035] In the thickness direction of the electrochromic device, the through groove penetrates the first conductive layer 120, thereby preventing residual conductive layer from connecting the conductive layers on both sides of the groove and affecting the control of zoned linkage color change.

[0036] In one embodiment, the end of the through slot is connected to the edge of the first conductive layer 120. For example, the through slot is formed along the centerline of the first conductive layer 120, dividing the first conductive layer 120 into a first conductive portion 122 and a second conductive portion 123 that are arranged inside and outside, left and right, or up and down.

[0037] In one embodiment, a through groove with a closed outline is formed in the middle of the first conductive layer 120, dividing the first conductive layer 120 into a first conductive portion 122 and a second conductive portion 123, which are inside and outside the pattern. A closed pattern refers to a pattern with a closed outline.

[0038] The first composite substrate layer 130 is disposed on the side of the first conductive layer 120 away from the electrochromic layer 110.

[0039] The first composite substrate 130 includes a first insulating substrate 133 and a first conductive structure 131 embedded in the first insulating substrate 133. The first insulating substrate 133 is made of a transparent insulating material, so that the optical state change of the electrochromic layer 110 can be reflected in the appearance of the electrochromic device, showing reversible changes in color and transparency.

[0040] A receiving groove can be formed on the first insulating substrate 133 by laser etching or chemical etching, and a high-transmittance metal paste (such as Cu / Ag alloy) can be printed in the receiving groove to form the first conductive structure 131. Specifically, as an example, the first conductive structure 131 can be a metal mesh structure.

[0041] In some embodiments, the linewidth of the first conductive structure 131 is within 5 μm, which can enable the light transmittance of the first composite substrate layer 130 to reach more than 85%.

[0042] The first conductive part 122 and the second conductive part 123 are electrically connected to the first conductive structure 131 respectively. When a voltage is applied to the first conductive part 122 or the second conductive part 123 in the first conductive layer 120, the second conductive part 123 can be connected to the first conductive part 122 because the first conductive structure 131 is conductive, thus realizing the function of zoned linkage color change.

[0043] The electrical connection structure in which the first conductive part 122 and the second conductive part 123 are electrically connected to the first conductive structure 131 is particularly suitable for situations where the first conductive part 122 and the second conductive part 123 are separated by a closed pattern. This solves the problem in the prior art that the first conductive part 122 and the second conductive part 123, which are separated by a completely closed pattern, need to change color in conjunction.

[0044] In some embodiments, such as Figure 2As shown, the thickness of the first conductive structure 131 is less than the thickness of the first insulating substrate 133, so that the first conductive structure 131 can be completely contained within the first insulating substrate 133, thus protecting the first conductive structure 131. At the same time, the end face of the first conductive structure 131 facing the electrochromic layer 110 is flush with the end face of the first insulating substrate 133 facing the electrochromic layer 110.

[0045] like Figure 2 As shown, the first composite substrate layer 130 includes a first side facing the electrochromic layer 110, and the first side includes an insulating region formed by the first insulating substrate 133 and two conductive regions formed by the first conductive structure 131.

[0046] The insulating area is in contact with and insulated from the electrochromic layer 110, and the two conductive areas are spaced apart. The two conductive areas are in contact with and electrically connected to the first conductive part 122 and the second conductive part 123, respectively.

[0047] Compared to having the end face of the first conductive structure 131 protruding onto the surface of the first insulating substrate 133 facing the electrochromic layer 110, this structure can reduce the impact of external forces on the stability of the electrical connection caused by end damage.

[0048] In addition, if the end face of the first conductive structure 131 facing the electrochromic layer 110 protrudes onto the surface of the first insulating substrate 133, a receiving groove for receiving the end of the first conductive structure 131 needs to be opened at the corresponding position of the first conductive part 122 or the second conductive part 123, which makes the manufacturing process of the electrochromic device more complicated and is not conducive to improving production efficiency.

[0049] In some embodiments, the thickness of the first insulating substrate 133 is equal to the thickness of the first composite substrate layer 130, allowing the first conductive structure 131 to be completely housed within the first insulating substrate 133. The first insulating substrate 133 protects the first conductive structure 131, which helps reduce the thickness of the first composite substrate layer 130. Simultaneously, the end face of the first conductive structure 131 facing the electrochromic layer 110 is flush with the end face of the first insulating substrate 133 facing the electrochromic layer 110, enabling the first conductive portion 122 and the second conductive portion 123 to conduct through the first composite substrate layer 130, achieving a zoned, synchronized color-changing effect.

[0050] In some embodiments, the conductivity of the first conductive structure 131 is greater than the conductivity of the first conductive portion 122 and greater than the conductivity of the second conductive portion 123.

[0051] For example, the sheet resistance of the first conductive layer 120 is 15-30 Ω / □, and the first conductive structure 131 is made of a metal material (such as a copper-silver alloy), whose sheet resistance can be reduced to less than 1 Ω / □ (as low as 0.1 Ω / □). Increasing the conductivity of the first conductive structure 131 can increase the conduction rate between the first conductive part 122 and the second conductive part 123. The low resistance of the first conductive structure 131 reduces voltage loss, making the voltage of the first conductive part 122 and the second conductive part 123 basically the same, and the color change more uniform.

[0052] Compared to the case where the first conductive part 122 and the second conductive part 123 are continuously arranged in the prior art, by setting the first conductive structure 131 with a higher conductivity, the first conductive part 122 or the second conductive part 123 can change color more quickly.

[0053] In some embodiments, the first conductive structure 131 includes a first electrical connection portion 1311 and a second electrical connection portion 1312.

[0054] like Figure 2 and Figure 4 As shown, one end of the first electrical connection portion 1311 is electrically connected to the first conductive portion 122, and one end of the second electrical connection portion 1312 is electrically connected to the second conductive portion 123. For example, the end face of the first electrical connection portion 1311 abuts against the first conductive portion 122 to form an electrical connection, and the end face of the second electrical connection portion 1312 abuts against the second conductive portion 123 to form an electrical connection.

[0055] In the direction parallel to the electrochromic layer 110, the first electrical connection portion 1311 and the second electrical connection portion 1312 are spaced apart. The region of the first insulating substrate 133 located between the first electrical connection portion 1311 and the second electrical connection portion 1312 forms a groove 1314.

[0056] In one embodiment, removing the first insulating substrate 133 between the first electrical connection portion 1311 and the second electrical connection portion 1312 can prevent communication between the first electrical connection portion 1311 and the second electrical connection portion 1312 and the area between the first conductive portion 122 and the second conductive portion 123.

[0057] In one embodiment, by retaining the first insulating substrate 133 between the first electrical connection 1311 and the second electrical connection 1312, communication between the first electrical connection 1311 and the second electrical connection 1312 and the area between the first conductive part 122 and the second conductive part 123 is avoided.

[0058] In some embodiments, such as Figure 3 and Figure 4As shown, the distance between the first electrical connection portion 1311 and the second electrical connection portion 1312 is D1, and the distance between the first conductive portion 122 and the second conductive portion 123 is D2, satisfying: 1≤D1 / D2≤2. The distance between the first electrical connection portion 1311 and the second electrical connection portion 1312 is greater than the distance between the first conductive portion 122 and the second conductive portion 123, which can make the first electrical connection portion 1311 and the first conductive portion 122, and the second electrical connection portion 1312 and the second conductive portion 123 form stable electrical connections, making it less prone to breakage; increasing the distance between the first electrical connection portion 1311 and the second conductive portion 123, and the second electrical connection portion 1312 and the first conductive portion 122, can prevent the areas between the first electrical connection portion 1311 and the second electrical connection portion 1312 and the first conductive portion 122 and the second conductive portion 123 from being connected, thus avoiding pattern color mixing.

[0059] In some embodiments, the spacing D2 between the first conductive portion 122 and the second conductive portion 123 is 50-100 μm.

[0060] In some embodiments, the first conducting structure 131 further includes a first conducting portion 1313.

[0061] like Figure 2 and Figure 4 As shown, the first conductive part 1313 is disposed at the bottom of the groove 1314, and the other end of the first electrical connection part 1311 and the other end of the second electrical connection part 1312 are respectively electrically connected to the first conductive part 1313.

[0062] The other end of the first electrical connection 1311 and the other end of the second electrical connection 1312 refer to the end of the first electrical connection 1311 away from the electrochromic layer 110 and the end of the second electrical connection 1312 away from the electrochromic layer 110, respectively. When a voltage is applied to the first conductive layer 120, current flows from the first electrical connection 1311 to the first conductive part 1313, and then to the second electrical connection 1312.

[0063] In some embodiments, the conductivity of the first conductive portion 1313 is set to be lower than that of the first electrical connection portion 1311 and lower than that of the second electrical connection portion 1312.

[0064] For example, the sheet resistance of the first conductive layer 120 is 15-30 Ω / □, the sheet resistance of the first electrical connection portion 1311 and the second electrical connection portion 1312 is 0.01-0.1 Ω / □, and the sheet resistance of the first conducting portion 1313 is 50-300 Ω / □. When the first conductive layer 120 is turned on, the color change of the first conductive portion 122 and the second conductive portion 123 is asynchronous, or there is a time difference in their lighting. By adjusting the sheet resistance value of the first conducting portion 1313, the magnitude of the time difference can be precisely adjusted, making the color change of the first conductive portion 122 and the second conductive portion 123 more uniform.

[0065] By adjusting the sheet resistance of the metal mesh, i.e., adjusting the first conductive structure 131, the first electrical connection 1311 and the second electrical connection 1312, differentiated color-changing response speeds of different regions (i.e., the first conductive part 122 and the second conductive part 123) can be achieved.

[0066] In some embodiments, a first dividing groove 121 is formed on the first conductive layer 120, extending through the first conductive layer 120 along the thickness direction of the electrochromic layer 110. That is, the first dividing groove 121 forms an insulating region with a closed outline. The first dividing groove 121 separates the first conductive layer 120 into a first conductive portion 122 and a second conductive portion 123 that are separate from each other and electrically insulated from each other, wherein: Along the thickness direction of the electrochromic layer 110, the projection of the first electrical connection portion 1311 is located within the projection of the first conductive portion 122 and does not overlap with the projection of the first partition groove 121, so that the first electrical connection portion 1311 and the first conductive portion 122 are in full contact, and the distance between the first electrical connection portion 1311 and the second conductive portion 123 is increased, reducing the risk of color bleeding.

[0067] Along the thickness direction of the electrochromic layer 110, the projection of the second electrical connection portion 1312 is located within the projection of the second conductive portion 123 and does not overlap with the projection of the first partition groove 121, so that the second electrical connection portion 1312 and the second conductive portion 123 are in full contact, and the distance between the second electrical connection portion 1312 and the first conductive portion 122 is increased, reducing the risk of color bleeding.

[0068] Along the thickness direction of the electrochromic layer 110, the projection of the first dividing groove 121 is located within the projection of the first conductive portion 1313 and within the projection of the groove 1314. Along the thickness direction of the electrochromic layer 110, the projection of the first conductive portion 1313 completely covers the first dividing groove 121.

[0069] Complete coverage means that the edge of the projection of the first conductive part 1313 completely coincides with the edge of the first dividing groove 121, or the edge of the projection of the first conductive part 1313 is outside the edge of the first dividing groove 121. The first conductive part 1313 and the first dividing groove 121 have the same or similar shape, and the first conductive part 122 and the second conductive part 123 are connected along the contour of the first dividing groove 121.

[0070] This application achieves linear connection between the first conductive part 122 and the second conductive part 123 by setting the projection of the first conductive part 1313 to completely cover the gap between the first conductive part 122 and the second conductive part 123. The connecting line is the outline of the first conductive part 1313, thereby improving the connection stability of the first conductive part 122 and the second conductive part 123.

[0071] The cross-sectional shape and size of the first partition groove 121 can be set as needed, as long as it has a closed outline. In some embodiments, such as Figure 1 and Figure 3 As shown, the cross-section of the first dividing groove 121 is annular, and both the first electrical connection portion 1311 and the second electrical connection portion 1312 are annular, with the second electrical connection portion 1312 surrounding the outside of the first electrical connection portion 1311. The annular closed shape of the cross-section of the first dividing groove 121 achieves electrical isolation between the first conductive portion 122 and the second conductive portion 123. By setting the first electrical connection portion 1311 and the second electrical connection portion 1312 to be annular, and correspondingly, the second conductive portion 123 surrounding the outside of the first conductive portion 122 and the second electrical connection portion 1312 surrounding the outside of the first electrical connection portion 1311, the current transmission path from each point on the second electrical connection portion 1312 to the first electrical connection portion 1311 and to the first conductive portion 122 is equal, achieving uniform color change response of the first conductive portion 122 with uniform color change brightness.

[0072] like Figure 2 and Figure 4 As shown, the outer diameter of the first electrical connection portion 1311 is smaller than the inner diameter of the first partition groove 121, and the inner diameter of the second electrical connection portion 1312 is larger than the outer diameter of the first partition groove 121. The first connection portion is located inside the first partition groove 121 and electrically connected to the first electrical connection portion 1311, while the second electrical connection portion 1312 is located outside the first partition groove 121 and electrically connected to the second electrical connection portion 1312. The first conductive portion 1313 covers the top of the first partition groove 121, indicating the position of the first partition groove 121. When a voltage is applied to the first conductive layer 120, light from the second conductive portion 123 passes through the outside of the first conductive portion 1313, while light from the first conductive portion 122 passes through the inside of the first conductive portion 1313, achieving zoned linkage display.

[0073] In some embodiments, the contact area between the first electrical connection portion 1311 and the first conductive portion 122 is S1, the contact area between the second electrical connection portion 1312 and the second conductive portion 123 is S2, the cross-sectional area of ​​the first conductive portion 122 is S3, and the cross-sectional area of ​​the second conductive portion 123 is S4, satisfying at least one of the following conditions: Condition 1: (S1+S2) / (S3+S4)>0.05.

[0074] Condition 2: S1 < S3.

[0075] Condition 3: S2 < S4.

[0076] By increasing the contact area S1 between the first electrical connection 1311 and the first conductive part 122, and the contact area S2 between the second electrical connection 1312 and the second conductive part 123, the electrical connection becomes more stable. Furthermore, the current carrying capacity of the first electrical connection 1311 and the first conductive part 122, and the second electrical connection 1312 and the second conductive part 123 can be adjusted by changing the area size.

[0077] In some embodiments, see Figure 5 and Figure 6 The first conductive portion 122 includes a first sub-conductive portion 1221 and a second sub-conductive portion 1222 separated by an insulating region having a closed outline, such as Figure 5 As shown, the first conductive layer 120 is divided into three electrically isolated sections.

[0078] The first conductive structure 131 is electrically connected to the second sub-conductive part 1222, and the first composite substrate layer 130 further includes the second conductive structure 132, wherein: The second conductive structure 132 and the first conductive structure 131 are arranged at intervals, and the second conductive structure 132 is electrically connected to the first sub-conductive part 1221 and the second sub-conductive part 1222.

[0079] In one embodiment, the first conductive layer 120 further includes a second partition groove 124, which is annular and divides the first conductive portion 122 into a first sub-conductive portion 1221 and a second sub-conductive portion 1222 that are separated from each other.

[0080] like Figure 5 and Figure 6 As shown, the first sub-conductive portion 1221 and the second sub-conductive portion 1222 are distributed in an enclosing manner, with the first sub-conductive portion 1221 disposed within the second sub-conductive portion 1222; The first conductive structure 131 and the second conductive structure 132 are arranged at intervals and in an enclosed distribution. The second conductive structure 132 is electrically connected to the first sub-conductive part 1221 and the second sub-conductive part 1222, and the first conductive structure 131 is electrically connected to the second sub-conductive part 1222 and the second conductive part 123.

[0081] In some embodiments, the second conductive structure 132 is electrically connected to the first conductive structure 131 and the first sub-conductive part 1221.

[0082] In one embodiment, the first conductive layer 120 further includes a second partition groove 124, which is linear and divides the first conductive portion 122 into a first sub-conductive portion 1221 and a second sub-conductive portion 1222 that are separated from each other.

[0083] The first sub-conductive part 1221 and the second sub-conductive part 1222 are arranged in parallel. The second conductive structure 132 is electrically connected to the first conductive structure 131, thereby connecting the second sub-conductive part 1222.

[0084] In some embodiments, the first conductive structure 131 and the second conductive structure 132 have different conductivities.

[0085] The conductivity of the first conductive structure 131 and the conductivity of the second conductive structure 132 are both higher than the conductivity of the first conductive layer 120.

[0086] In some embodiments, the second conductive structure 132 includes a third electrical connection portion 1321, a second conductive portion 1323, and a fourth electrical connection portion 1322 connected in sequence, wherein the conductivity of the second conductive portion 1323 is lower than that of the third electrical connection portion 1321 and the fourth electrical connection portion 1322.

[0087] For example, the sheet resistance of the first conductive layer 120 is 15-30 Ω / □, the sheet resistance of the third electrical connection 1321 and the fourth electrical connection 1322 is 0.01-0.1 Ω / □, and the sheet resistance of the second conductive part 1323 is 50-300 Ω / □. When the first conductive layer 120 is turned on, the first sub-conductive part 1221 and the second sub-conductive part 1222 may change color asynchronously or have a time difference in lighting. The magnitude of the time difference can be precisely adjusted by adjusting the sheet resistance value of the second conductive part 1323.

[0088] like Figure 5 and Figure 6 As shown, the lighting time difference of the first sub-conducting part 1221, the second sub-conducting part 1222, and the second conductive part 123 can also be adjusted by adjusting the resistance values ​​of the first conductive part 1313 and the second conductive part 1323, for example, controlling the color-changing time difference of the three to be 1-3 seconds.

[0089] In some embodiments, such as Figure 7 As shown, the electrochromic device also includes a second conductive layer 140. The second conductive layer 140 includes a third conductive portion 142 and a fourth conductive portion 143. Correspondingly, the second composite substrate layer 150 includes a second insulating substrate 152 and a third conductive structure 151 embedded in the second insulating substrate 152. The third conductive portion 142 and the fourth conductive portion 143 are electrically connected to the third conductive structure 151, respectively.

[0090] A third partition groove 141 is formed on the second conductive layer 140, which penetrates the first conductive layer 120 in a direction opposite to the electrochromic layer 110. The third partition groove 141 separates the second conductive layer 140 into a third conductive portion 142 and a fourth conductive portion 143 that are separate from each other.

[0091] The second composite substrate layer 150 is disposed on the side of the second conductive layer 140 away from the electrochromic layer 110. The second composite substrate layer 150 includes a third conductive structure 151. In the thickness direction of the electrochromic layer 110, the projection of the third partition groove 141 is located in the third conductive structure 151. The third conductive part 142 and the fourth conductive part 143 are electrically connected to the third conductive structure 151, respectively.

[0092] This application provides a terminal product, including the electrochromic device of any of the foregoing embodiments, wherein the terminal product includes any one of a rearview mirror, curtain wall, car sunroof, car side window, car windshield, electronic product housing, glasses, and electronic product display panel.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An electrochromic device, characterized in that, include: Electrochromic layer; A first conductive layer is disposed on the electrochromic layer, the first conductive layer comprising a first conductive portion and a second conductive portion separated by an insulating region having a closed outline; A first composite substrate layer is disposed on the side of the first conductive layer away from the electrochromic layer. The first composite substrate layer includes a first insulating substrate and a first conductive structure embedded in the first insulating substrate. The first conductive portion and the second conductive portion are respectively electrically connected to the first conductive structure.

2. The electrochromic device according to claim 1, characterized in that, The conductivity of the first conductive structure is greater than the conductivity of the first conductive part and the conductivity of the second conductive part.

3. The electrochromic device according to claim 1, characterized in that, The first conductive structure includes a first electrical connection portion and a second electrical connection portion that are spaced apart from each other. One end of the first electrical connection portion is electrically connected to the first conductive portion, and one end of the second electrical connection portion is electrically connected to the second conductive portion. The region of the first insulating substrate located between the first electrical connection portion and the second electrical connection portion forms a groove with the opening facing the first conductive layer.

4. The electrochromic device according to claim 3, characterized in that, The distance between the first electrical connection and the second electrical connection is D1, and the distance between the first conductive part and the second conductive part is D2, satisfying: 1≤D1 / D2≤2.

5. The electrochromic device according to claim 3, characterized in that, The first conductive structure further includes a first conductive part, which is disposed at the bottom of the groove, and the other end of the first electrical connection part and the other end of the second electrical connection part are respectively electrically connected to the first conductive part.

6. The electrochromic device according to claim 5, characterized in that, The first conductive structure is a metal mesh layer, the sheet resistance of the first conductive part is 50-300MΩ / □, and the sheet resistance of both the first electrical connection part and the second electrical connection part is between 0.01-0.2Ω / □.

7. The electrochromic device according to claim 5, characterized in that, The insulating region is a first partition groove that penetrates the first conductive layer along the thickness direction of the electrochromic layer. Along the thickness direction of the electrochromic layer, the projection of the first electrical connection portion is located within the projection of the first conductive portion and does not overlap with the projection of the first partition groove, and the projection of the second electrical connection portion is located within the projection of the second conductive portion and does not overlap with the projection of the first partition groove. The projection of the first dividing groove is located within the projection of the first conductive part and within the projection of the groove.

8. The electrochromic device according to claim 3, characterized in that, The contact area between the first electrical connection portion and the first conductive portion is S1, the contact area between the second electrical connection portion and the second conductive portion is S2, the cross-sectional area of ​​the first conductive portion is S3, and the cross-sectional area of ​​the second conductive portion is S4, satisfying at least one of the following: (S1+S2) / (S3+S4)>0.05; or S1 < S3; or S2 < S4.

9. The electrochromic device according to claim 1, characterized in that, The first conductive portion includes a first sub-conductive portion and a second sub-conductive portion separated by an insulating region having a closed contour line. The first conductive structure is electrically connected to the second sub-conductive portion. The first composite substrate layer further includes a second conductive structure, wherein: The second conductive structure and the first conductive structure are spaced apart, and the second conductive structure is electrically connected to the first sub-conductive part and the second sub-conductive part; or The second conductive structure is electrically connected to the first conductive structure and the first sub-conductive part.

10. The electrochromic device according to claim 9, characterized in that, The first conductive structure and the second conductive structure have different conductivities.

11. A terminal product, characterized in that, The electrochromic device includes any one of claims 1 to 10, wherein the end product includes any one of a rearview mirror, a curtain wall, a sunroof, a side window, a windshield, a housing of an electronic product, eyeglasses, and a display panel of an electronic product.

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