Electrochromic device, rearview mirror and vehicle

Abstract

The embodiment of the utility model provides an electrochromic device, a rearview mirror and a vehicle, and belongs to the technical field of electrochromism, the electrochromic device comprises a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer and a second substrate which are stacked in sequence, a first bus bar is arranged between the first conductive layer and the electrochromic stacking layer, and a second bus bar is arranged between the second conductive layer and the second substrate; a second bus bar is arranged between the second conductive layer and the electrochromic stacking layer, and at least one side of the electrochromic stacking layer in the thickness direction is provided with a barrier piece. The thickness of a part of the electrochromic stack layer corresponding to the barrier, the first bus bar and the second bus bar is smaller than the thickness of the remaining part of the electrochromic stack layer. The barrier is proximate to at least one of the first bus bar and the second bus bar. The barrier is not overlapped with the first bus bar and the second bus bar. Therefore, according to the electrochromic device, the rearview mirror and the vehicle provided by the embodiment of the invention, the ablation phenomenon of the electrochromic stacking layer can be relieved, so that the abnormal color change phenomenon of the electrochromic device is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of electrochromic technology, and in particular to an electrochromic device, a rearview mirror and a vehicle. Background Art

[0002] Electrochromism refers to the phenomenon that the optical properties of a material (reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes under the action of an external electric field, which manifests itself in appearance as reversible changes in color and transparency.

[0003] In the related art, the electrochromic device may include a first substrate, a first conductive layer, an electrochromic stacked layer, a second conductive layer and a second substrate, a first bus bar is arranged between the first conductive layer and the electrochromic stacked layer, and a second bus bar is arranged between the second conductive layer and the electrochromic stacked layer.

[0004] However, the electrochromic stacked layer is prone to ablation, which may cause the electrochromic device to have abnormal color change. Summary of the invention

[0005] In view of at least one of the above technical problems, the embodiments of the present application provide an electrochromic device, a rearview mirror and a vehicle, which can alleviate the ablation phenomenon of the electrochromic stack layer, thereby alleviating the abnormal color change phenomenon of the electrochromic device.

[0006] The embodiments of the present application provide the following technical solutions:

[0007] The first aspect of the embodiment of the present application provides an electrochromic device including: a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer and a second substrate stacked in sequence, a first bus bar is arranged between the first conductive layer and the electrochromic stacking layer, a second bus bar is arranged between the second conductive layer and the electrochromic stacking layer, and a barrier is arranged between the first conductive layer and the electrochromic stacking layer, and between the second conductive layer and the electrochromic stacking layer. In the electrochromic stacking layer, the thickness of the portion of the electrochromic stacking layer corresponding to the barrier, the first bus bar and the second bus bar is less than the thickness of the remaining portion of the electrochromic stacking layer. The barrier is arranged close to at least one of the first bus bar and the second bus bar. The orthographic projection of the barrier on the plane where the first conductive layer is located does not overlap with the orthographic projection of the first bus bar and the second bus bar on the plane where the first conductive layer is located.

[0008] The electrochromic device provided in the embodiment of the present application may include a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer, and a second substrate which are sequentially stacked, a first bus bar is provided between the first conductive layer and the electrochromic stacking layer, a second bus bar is provided between the second conductive layer and the electrochromic stacking layer, a barrier is provided between the first conductive layer and the electrochromic stacking layer, and at least one of the second conductive layer and the electrochromic stacking layer, the barrier is provided close to at least one of the first bus bar and the second bus bar, and the orthographic projection of the barrier on the plane where the first conductive layer is located may not overlap with the orthographic projection of the first bus bar and the second bus bar on the plane where the first conductive layer is located. In the electrochromic stacking layer, the thickness of the portion of the electrochromic stacking layer corresponding to the barrier, the first bus bar, and the second bus bar is less than the thickness of the remaining portion of the electrochromic stacking layer. In this arrangement, a barrier is provided between the first conductive layer and the electrochromic stacking layer, and between the second conductive layer and the electrochromic stacking layer, and the barrier is provided close to at least one of the first bus bar and the second bus bar. At this time, the electrochromic stacking layer corresponding to the barrier is provided close to at least one of the first bus bar and the second bus bar, and this part of the electrochromic stacking layer is prone to ablation due to its close distance to the bus bar. The barrier can reduce the thickness of this part of the electrochromic stacking layer, and the ablation amount of this part of the electrochromic stacking layer will be reduced, so that the speed of the ablation phenomenon from this part of the electrochromic stacking layer to the surroundings is slowed down, so that the ablation amount and ablation area caused by the diffusion are reduced, thereby alleviating the ablation phenomenon of the electrochromic stacking layer and the abnormal color change phenomenon of the electrochromic device, so that the electrochromic device will not show obvious appearance defects during its service life.

[0009] In a possible implementation, the first bus bar has a first orthographic projection on the plane where the first conductive layer is located, the second bus bar has a second orthographic projection on the plane where the first conductive layer is located, and the barrier has a third orthographic projection on the plane where the first conductive layer is located. The first orthographic projection and the second orthographic projection are both strip-shaped, and there is a gap between the first orthographic projection and the second orthographic projection, and the third orthographic projection is located between the first orthographic projection and the second orthographic projection.

[0010] In a possible embodiment, the barrier includes a first barrier and a second barrier, the third orthographic projection of the first barrier is arranged close to the first orthographic projection and is located on one side of the width direction of the first orthographic projection, and the third orthographic projection of the second barrier is arranged close to the second orthographic projection and is located on one side of the width direction of the second orthographic projection.

[0011] In a possible implementation, the first bus bar includes a first binding portion, the second bus bar includes a second binding portion, the third orthographic projection of the first barrier is disposed close to the first orthographic projection of the first binding portion, and the third orthographic projection of the second barrier is disposed close to the second orthographic projection of the second binding portion.

[0012] In a possible implementation, the first bus bar includes a first extension portion connected to the first binding portion, and the second bus bar includes a second extension portion connected to the second binding portion. The third orthographic projection of the first barrier is disposed close to the first orthographic projection of the first extension portion, and the third orthographic projection of the second barrier is disposed close to the second orthographic projection of the second extension portion.

[0013] In a possible implementation manner, the first barrier element and the second barrier element are arranged in the same layer and are connected to form a ring.

[0014] In a possible implementation, the barrier includes a third barrier, the two ends of the first busbar in the extension direction are first ends, the two ends of the second busbar in the extension direction are second ends, the first orthographic projections of the two first ends and the second orthographic projections of the two second ends are arranged in a one-to-one correspondence. The third orthographic projection of the third barrier is located between the first orthographic projection of the first end and the second orthographic projection of the corresponding second end.

[0015] In a possible implementation, in the third barrier and the first end that are close to each other, the third barrier is provided with a first embedding portion, the first end is provided with a second embedding portion, and the third orthographic projection of the first embedding portion and the first orthographic projection of the second embedding portion are mutually embedded.

[0016] It can be realized that, in the third barrier and the second end which are close to each other, the third barrier is provided with a third fitting portion, the second end is provided with a fourth fitting portion, and the third orthographic projection of the third fitting portion and the second orthographic projection of the fourth fitting portion are fitted with each other.

[0017] In a possible implementation, the first bus bar and the second bus bar are both annular, and the orthographic projection of the first bus bar on the plane where the first conductive layer is located at least partially overlaps with the orthographic projection of the second bus bar on the plane where the first conductive layer is located. The barrier is located on the inner side of at least one of the first bus bar and the second bus bar.

[0018] In a possible implementation, along the direction from the first conductive layer to the second conductive layer, the electrochromic stack layer includes an electrochromic layer, an electrolyte layer, and an ion storage layer stacked in sequence. The barrier is located between the first conductive layer and the electrochromic layer, and the thickness of the portion of the electrochromic layer corresponding to the barrier and the first bus bar is less than the thickness of the remaining portion of the electrochromic layer.

[0019] It can be realized that the barrier is located between the second conductive layer and the ion storage layer, and the thickness of the portion of the ion storage layer corresponding to the barrier and the second bus bar is smaller than the thickness of the remaining portion of the ion storage layer.

[0020] In a possible implementation, the barrier is an insulating member. Alternatively, the barrier is a conductive member. Alternatively, the barrier includes an insulating portion and a conductive portion, and the insulating portion is located on a side of the conductive portion facing the electrochromic stack layer.

[0021] A second aspect of an embodiment of the present application provides a rearview mirror, comprising the electrochromic device of the first aspect above, wherein the first conductive layer or the second conductive layer of the electrochromic device is a reflective element, or a reflective layer is provided on one side in the thickness direction of one of the first substrate and the second substrate of the electrochromic device.

[0022] A third aspect of an embodiment of the present application provides a vehicle, comprising a vehicle body and the rearview mirror of the above second aspect, wherein the rearview mirror is mounted on the vehicle body.

[0023] The rearview mirror and vehicle provided in the embodiment of the present application include an electrochromic device, which may include a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer, and a second substrate which are sequentially stacked, a first bus bar is provided between the first conductive layer and the electrochromic stacking layer, a second bus bar is provided between the second conductive layer and the electrochromic stacking layer, a barrier is provided between the first conductive layer and the electrochromic stacking layer, and at least one of the second conductive layer and the electrochromic stacking layer, the barrier is provided close to at least one of the first bus bar and the second bus bar, and the orthographic projection of the barrier on the plane where the first conductive layer is located may not overlap with the orthographic projection of the first bus bar and the second bus bar on the plane where the first conductive layer is located. In the electrochromic stacking layer, the thickness of the portion of the electrochromic stacking layer corresponding to the barrier, the first bus bar, and the second bus bar is less than the thickness of the remaining portion of the electrochromic stacking layer. In this way, a barrier is provided between the first conductive layer and the electrochromic stack layer, and between the second conductive layer and the electrochromic stack layer, and the barrier is provided close to at least one of the first bus bar and the second bus bar. At this time, the electrochromic stack layer corresponding to the barrier is provided close to at least one of the first bus bar and the second bus bar, and this part of the electrochromic stack layer is prone to ablation due to its close distance to the bus bar. The barrier can reduce the thickness of this part of the electrochromic stacking layer, reduce the amount of ablation of this part of the electrochromic stacking layer, slow down the speed at which the ablation phenomenon spreads from this part of the electrochromic stacking layer to the surrounding areas, and reduce the amount of ablation and the ablation area caused by the diffusion, thereby alleviating the ablation phenomenon of the electrochromic stacking layer and the abnormal color change of the electrochromic device, so that the electrochromic device will not show obvious appearance defects during its service life, thereby ensuring that the rearview mirror with the electrochromic device or the vehicle with the rearview mirror will not show obvious appearance defects, thereby improving the aesthetics of the rearview mirror or the vehicle.

[0024] The construction of the present application as well as its other objects and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1a A cross-sectional view of an electrochromic device provided in an embodiment of the present application;

[0027] Figure 1bAnother cross-sectional view of the electrochromic device provided in an embodiment of the present application;

[0028] Figure 2 A perspective view of a barrier and a bus bar provided in an embodiment of the present application;

[0029] Figure 3 A top view of a barrier and a bus bar provided in an embodiment of the present application;

[0030] Figure 4 A partial top view of a barrier and a bus bar provided in an embodiment of the present application;

[0031] Figure 5 Another partial top view of the barrier and bus bar provided in the embodiment of the present application;

[0032] Figure 6 Another top view of the barrier and bus bar provided in the embodiment of the present application;

[0033] Figure 7 Another partial top view of the barrier and bus bar provided in the embodiment of the present application;

[0034] Figure 8 Another top view of the barrier and bus bar provided in the embodiment of the present application;

[0035] Fig. 9 A top view of a third barrier, a first end, and a second end provided in an embodiment of the present application;

[0036] Fig.10 Another top view of the barrier and bus bar provided in the embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100: electrochromic device; 100a: central area;

[0039] 100b: edge region; 111: first substrate;

[0040] 112: second substrate; 120: conductive layer;

[0041] 121: a first conductive layer; 122: a second conductive layer;

[0042] 130: electrochromic stack layer; 131: electrochromic layer;

[0043] 132: electrolyte layer; 133: ion storage layer;

[0044] 140: barrier member; 141: first barrier member;

[0045] 142: a second barrier; 143: a third barrier;

[0046] 144: conductive part; 145: insulating part;

[0047] 150: bus bar; 151: first bus bar;

[0048] 151a: first binding portion; 151b: first extending portion;

[0049] 151c: first end; 152: second bus bar;

[0050] 152a: second binding portion; 152b: second extending portion;

[0051] 152c: second end; 161: first engaging portion;

[0052] 162: The second fitting part; 163: The third fitting part;

[0053] 164: Fourth engaging portion. DETAILED DESCRIPTION

[0054] In the related art, the electrochromic device may include a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer and a second substrate, a first bus bar is arranged between the first conductive layer and the electrochromic stacking layer, and a second bus bar is arranged between the second conductive layer and the electrochromic stacking layer. Along the direction from the first conductive layer to the second conductive layer, the electrochromic stacking layer may include an electrochromic layer, an electrolyte layer and an ion storage layer stacked in sequence. For example, the material of the first conductive layer and the second conductive layer may include indium tin oxide (ITO for short). In some examples, the material of the first bus bar and the second bus bar may include at least one of copper, silver and other metals.

[0055] The preparation process of the electrochromic device can be: magnetron sputtering forms a first conductive layer on a first substrate, magnetron sputtering forms a second conductive layer on a second substrate, and then screen-printing silver wires on the first conductive layer and the second conductive layer, respectively. The silver wires on the first conductive layer can form a first bus bar, and the silver wires on the second conductive layer can form a second bus bar. Then, the electrochromic layer is coated on the first conductive layer on which the silver wires are screen-printed to form a first composite film layer, and the ion storage layer is coated on the second conductive layer on which the silver wires are screen-printed to form a second composite film layer. Then, the first composite film layer and the second composite film layer are stacked relative to each other, and the electrochromic layer and the ion storage layer are arranged relative to each other. Then, an electrolyte layer is added between the electrochromic layer and the ion storage layer, and the first composite film layer and the second composite film layer are bonded together through the electrolyte layer to form an electrochromic device. In some examples, after screen-printing the silver wires on the conductive layer, varnish can be further screen-printed on the silver wires to use the varnish as an insulating protective layer for the silver wires.

[0056] However, since the surface resistance of the conductive layer ITO is often large, in order to achieve rapid and uniform distribution of current on the entire first conductive layer and the second conductive layer, a large voltage is usually applied to the first bus bar and the second bus bar. During the long-term use of the electrochromic device, part of the electrochromic stacking layer arranged close to the first bus bar and the second bus bar will be in a large voltage charge and discharge environment for a long time, making this part of the electrochromic stacking layer prone to ablation. At the beginning, the ablation phenomenon is not serious and has little effect on the appearance of the electrochromic device, but as the use time increases, the ablation phenomenon will gradually spread from this part of the electrochromic stacking layer to the surrounding area, making the ablation area gradually larger, thereby causing the electrochromic device to have abnormal color change, for example, the abnormal color change includes the inability to change color and showing white edges, or the inability to change to the desired color.

[0057] Based on at least one of the above technical problems, the embodiments of the present application provide an electrochromic device, a rearview mirror and a vehicle, wherein the electrochromic device may include a first substrate, a first conductive layer, an electrochromic stacking layer, a second conductive layer and a second substrate which are sequentially stacked, a first bus bar is provided between the first conductive layer and the electrochromic stacking layer, a second bus bar is provided between the second conductive layer and the electrochromic stacking layer, a barrier is provided between the first conductive layer and the electrochromic stacking layer, and at least one of the second conductive layer and the electrochromic stacking layer, the barrier is provided close to at least one of the first bus bar and the second bus bar, and the orthographic projection of the barrier on the plane where the first conductive layer is located may not overlap with the orthographic projection of the first bus bar and the second bus bar on the plane where the first conductive layer is located. In the electrochromic stacking layer, the thickness of the portion of the electrochromic stacking layer corresponding to the barrier, the first bus bar and the second bus bar is less than the thickness of the remaining portion of the electrochromic stacking layer. In this arrangement, a barrier is provided between the first conductive layer and the electrochromic stacking layer, and between the second conductive layer and the electrochromic stacking layer, and the barrier is provided close to at least one of the first bus bar and the second bus bar. At this time, the electrochromic stacking layer corresponding to the barrier is provided close to at least one of the first bus bar and the second bus bar, and this part of the electrochromic stacking layer is prone to ablation due to its close distance to the bus bar. The barrier can reduce the thickness of this part of the electrochromic stacking layer, and the ablation amount of this part of the electrochromic stacking layer will be reduced, so that the speed of the ablation phenomenon from this part of the electrochromic stacking layer to the surroundings is slowed down, so that the ablation amount and ablation area caused by the diffusion are reduced, thereby alleviating the ablation phenomenon of the electrochromic stacking layer and the abnormal color change phenomenon of the electrochromic device, so that the electrochromic device will not show obvious appearance defects during its service life.

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] The following will be combined Figure 1a-Figure 10 The electrochromic device 100 provided in the embodiment of the present application is described.

[0060] See also Figure 1a and Figure 1b The present invention provides an electrochromic device 100 in an embodiment. The electrochromic device 100 may include an electrochromic stacked layer 130 and two conductive layers 120. The two conductive layers 120 may be arranged in a thickness direction ( Figure 1a The two conductive layers 120 may include a first conductive layer 121 and a second conductive layer 122, wherein, along the direction from the first conductive layer 121 to the second conductive layer 122, the electrochromic stack 130 may include an electrochromic layer 131, an electrolyte layer 132 and an ion storage layer 133 stacked in sequence. When a voltage is introduced to the two conductive layers 120 respectively, an electric field may be formed on both sides of the electrochromic stack 130, so that ions or electrons in the electrochromic layer 131 and the ion storage layer 133 in the electrochromic stack 130 are embedded or de-embedded through the electrolyte layer 132, so as to achieve a change in the color or transmittance of the electrochromic device 100, such as coloring or fading.

[0061] In some embodiments, along the direction from the first conductive layer 121 to the second conductive layer 122 , the electrochromic stack layer 130 may also include an ion storage layer 133 , an electrolyte layer 132 , and an electrochromic layer 131 that are stacked in sequence.

[0062] For example, the material of the conductive layer 120 may include a transparent conductive oxide material, such as indium tin oxide (ITO). Alternatively, the material of the conductive layer 120 may include a reflective conductive material, such as chromium (Cr), nickel (Ni), and the like.

[0063] In some embodiments, see Figure 1aThe electrochromic device 100 may further include a first substrate 111 and a second substrate 112. The first substrate 111 may be disposed on a side of the first conductive layer 121 away from the electrochromic stacked layer 130, and the first substrate 111 may be used to support and protect the first conductive layer 121. The second substrate 112 may be disposed on a side of the second conductive layer 122 away from the electrochromic stacked layer 130, and the second substrate 112 may be used to support and protect the second conductive layer 122.

[0064] Exemplarily, the first substrate 111 and the second substrate 112 may be rigid substrates, such as glass. Alternatively, the first substrate 111 and the second substrate 112 may be flexible substrates, and the material of the flexible substrate may include at least one of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate, polyethylene, polyacrylate, polyetherimide, polycarbonate, polyarylate, and polyethersulfone.

[0065] Exemplarily, the shape of the electrochromic device 100 is a regular shape such as a polygon, a circle, an ellipse, or other irregular shapes.

[0066] See also Figure 2 The electrochromic device 100 may include a central region 100a and an edge region 100b, and the edge region 100b may be arranged around the periphery of the central region 100a. The first bus bar 151 and the second bus bar 152 may be located in the edge region 100b. The central region 100a may be a visible region of the electrochromic device 100 (i.e., a region of interest for a user).

[0067] The bus bar 150 provided in the embodiment of the present application is described below.

[0068] In some embodiments, see Figure 1a and Figure 2 , the electrochromic device 100 may include a bus bar 150, which may be disposed between the conductive layer 120 and the electrochromic stack layer 130. The bus bar 150 may be used to electrically connect an external power source and the conductive layer 120 to introduce a voltage to the conductive layer 120. The number of the bus bars 150 may be two, and the two bus bars 150 may include a first bus bar 151 and a second bus bar 152, and the first bus bar 151 may be disposed between the first conductive layer 121 and the electrochromic stack layer 130. The second bus bar 152 may be disposed between the second conductive layer 122 and the electrochromic stack layer 130. Among them, the first bus bar 151 may be disposed between the first conductive layer 121 and the electrochromic layer 131, and the second bus bar 152 may be disposed between the second conductive layer 122 and the ion storage layer 133.

[0069] In some other embodiments, the first bus bar 151 may be disposed between the first conductive layer 121 and the ion storage layer 133 , and the second bus bar 152 may be disposed between the second conductive layer 122 and the electrochromic layer 131 .

[0070] Exemplarily, the busbar 150 may be formed by silk screen printing, deposition or other methods. The material of the busbar 150 may include conductive materials such as silver and copper. The resistivity of the busbar 150 may be less than the resistivity of the conductive layer 120, so that the electrical conduction rate of the busbar 150 is faster, and the voltage can be quickly and evenly dispersed throughout the corresponding conductive layer 120 to achieve the purpose of uniform color change.

[0071] In some embodiments, see Figure 2 The first bus bar 151 may include a first binding portion 151a, and the second bus bar 152 may include a second binding portion 152a. The first binding portion 151a and the second binding portion 152a may be protruded in a direction away from the central area 100a of the electrochromic device 100. The first binding portion 151a and the second binding portion 152a may be used to be electrically connected to an external power source, thereby driving the electrochromic device 100 to color or fade.

[0072] In some embodiments, see Figure 2 The first bus bar 151 may include a first extension portion 151b connected to the first binding portion 151a, and the first extension portion 151b may be located at both ends of the extension direction of the first binding portion 151a. The second bus bar 152 may include a second extension portion 152b connected to the second binding portion 152a, and the second extension portion 152b may be located at both ends of the extension direction of the second binding portion 152a.

[0073] In some embodiments, the first extension portion 151b and the second extension portion 152b may be covered by the electrochromic stack layer 130. Figure 1a , the first binding portion 151a and the second binding portion 152a may be exposed outside the electrochromic stack layer 130 to facilitate electrical connection with an external power source. For example, the first extension portion 151b and the second extension portion 152b may be provided with an insulating layer on the side facing the electrochromic stack layer 130, and the insulating layer may be formed by silk screen printing or other methods. The first binding portion 151a and the second binding portion 152a may not be provided with an insulating layer on the side facing the electrochromic stack layer 130 to facilitate electrical connection with an external power source. Exemplarily, the insulating layer provided on the side of the first extension portion 151b and the second extension portion 152b facing the electrochromic stack layer 130 may be varnish or other insulating materials.

[0074] Exemplarily, at least one of the first bus bar 151 and the second bus bar 152 may be in a bar shape (eg, approximately in an “L” shape, a “U” shape, a straight line shape, etc.), a ring shape, or other shapes.

[0075] See also Figure 2 In the embodiment where the first bus bar 151 is in a strip shape, both ends of the first bus bar 151 in the extension direction may be first ends 151c, and one end of the first extension portion 151b away from the first binding portion 151a may form the first end 151c. In the embodiment where the second bus bar 152 is in a strip shape, both ends of the second bus bar 152 in the extension direction may be second ends 152c, and one end of the second extension portion 152b away from the second binding portion 152a may form the second end 152c.

[0076] In some embodiments, the first bus bar 151 may have a first orthographic projection on the plane where the first conductive layer 121 is located, and the second bus bar 152 may have a second orthographic projection on the plane where the first conductive layer 121 is located. Figure 2 , the first orthographic projection and the second orthographic projection may not overlap, for example, there may be a gap between the first orthographic projection and the second orthographic projection. Alternatively, see Fig.10 , the first orthographic projection and the second orthographic projection may at least partially overlap.

[0077] See also Figure 2 In an embodiment where the first bus bar 151 and the second bus bar 152 are both bar-shaped and there is a spacing between the first orthographic projection and the second orthographic projection, the first orthographic projections of the two first ends 151c and the second orthographic projections of the two second ends 152c can be arranged in a one-to-one correspondence.

[0078] The barrier member 140 provided in the embodiment of the present application is described below.

[0079] As known from the related art, the voltage on the first bus bar 151 and the second bus bar 152 is relatively large, and the part of the electrochromic stacked layer 130 disposed near the first bus bar 151 and the second bus bar 152 is prone to ablation. The first binding portion 151a and the second binding portion 152a are input terminals of an external power supply. Due to the existence of a voltage drop, the voltage of the first binding portion 151a and the second binding portion 152a will be larger, thereby making the ablation phenomenon of the part of the electrochromic device 100 disposed near the first binding portion 151a and the second binding portion 152a more serious. In addition, in the embodiment where the first bus bar 151 and the second bus bar 152 are both bar-shaped, due to the existence of a tip discharge phenomenon at the first end 151c and the second end 152c, the ablation phenomenon of the part of the electrochromic device 100 disposed near the first end 151c and the second end 152c is more serious.

[0080] In some embodiments, see Figure 1a , a barrier 140 may be provided between the first conductive layer 121 and the electrochromic stacked layer 130. Alternatively, a barrier 140 may be provided between the second conductive layer 122 and the electrochromic stacked layer 130. Alternatively, a barrier 140 may be provided between the first conductive layer 121 and the electrochromic stacked layer 130, and between the second conductive layer 122 and the electrochromic stacked layer 130. In this way, the barrier 140 can be provided in a more flexible position and can be applied in more scenarios. The barrier 140 can reduce the thickness of the portion of the electrochromic stacked layer 130 corresponding to the barrier 140. The portion of the electrochromic stacked layer 130 corresponding to the barrier 140 may be the portion of the electrochromic stacked layer 130 covering the barrier 140. The barrier 140 may be disposed close to at least one of the first bus bar 151 and the second bus bar 152, and the orthographic projection of the barrier 140 on the plane where the first conductive layer 121 is located may not overlap with the orthographic projections of the first bus bar 151 and the second bus bar 152 on the plane where the first conductive layer 121 is located. At this time, the electrochromic stacked layer 130 corresponding to the barrier 140 is also disposed close to at least one of the first bus bar 151 and the second bus bar 152, and this part of the electrochromic stacked layer 130 is prone to ablation due to its close distance to the bus bar 150. The barrier 140 can reduce the thickness of this part of the electrochromic stack layer 130, and the amount of ablation of this part of the electrochromic stack layer 130 will be reduced, so that the speed at which the ablation phenomenon spreads from this part of the electrochromic stack layer 130 to the surroundings will be slowed down, and the amount of ablation and the ablation area caused by the diffusion will be reduced. In other words, the barrier 140 can have a certain barrier effect on the spread of the ablation phenomenon, thereby alleviating the ablation phenomenon of the electrochromic stack layer 130 and the abnormal color change phenomenon of the electrochromic device 100, so that the electrochromic device 100 will not show obvious appearance defects during its service life.

[0081] After forming the first bus bar 151 on the first conductive layer 121 and the second bus bar 152 on the second conductive layer 122, the electrochromic layer 131 may be coated on the first conductive layer 121 and the first bus bar 151, and the ion storage layer 133 may be coated on the second conductive layer 122 and the second bus bar 152. Since the barrier 140 is formed near at least one of the first bus bar 151 and the second bus bar 152 in the embodiment of the present application, the barrier 140 may reduce the electrochromic layer 131 and / or the ion storage layer 133 coated on the barrier 140, thereby reducing the thickness of the electrochromic stack layer 130 corresponding to the barrier 140. In addition, the barrier 140 may also reduce the electrolyte layer 132 added to the barrier 140. The thickness of the portion of the electrochromic stacked layer 130 corresponding to the first bus bar 151 and the second bus bar 152 will also become smaller. The principle is similar to that of the barrier 140 and will not be described in detail.

[0082] In some embodiments, the barrier 140 may be located between the first conductive layer 121 and the electrochromic layer 131, and the thickness of the electrochromic layer 131 covering the barrier 140 and the first bus bar 151 becomes smaller, so that the thickness of the electrochromic layer 131 corresponding to the barrier 140 and the first bus bar 151 may be less than the thickness of the remaining electrochromic layer 131. In this way, the barrier 140 can reduce the thickness of the electrochromic layer 131 corresponding to the barrier 140, so that the ablation amount of the electrochromic layer 131 corresponding to the barrier 140 is reduced, so that the speed of the ablation phenomenon from the electrochromic layer 131 corresponding to the barrier 140 to the surroundings is slowed down, so that the ablation amount and ablation area caused by the diffusion are reduced, so that the ablation phenomenon of the electrochromic stack layer can be alleviated, and the appearance defects of the electrochromic device 100 can be improved.

[0083] In other embodiments, the barrier 140 may be located between the second conductive layer 122 and the ion storage layer 133, and the thickness of the ion storage layer 133 covering the barrier 140 and the second bus bar 152 becomes smaller, so that the thickness of the portion of the ion storage layer 133 corresponding to the barrier 140 and the second bus bar 152 may be less than the thickness of the remaining portion of the ion storage layer 133. In this way, the barrier 140 can reduce the thickness of the ion storage layer 133 corresponding to the barrier 140, so that the ablation amount of the ion storage layer 133 corresponding to the barrier 140 is reduced, so that the speed at which the ablation phenomenon diffuses from the ion storage layer 133 corresponding to the barrier 140 to the surroundings is slowed down, so that the ablation amount and ablation area caused by the diffusion are reduced, thereby alleviating the ablation phenomenon of the electrochromic stack layer and improving the appearance defects of the electrochromic device 100.

[0084] The following describes the location of the barrier 140 when the first bus bar 151 and the second bus bar 152 provided in the embodiment of the present application are in a bar shape and there is a gap between the first orthographic projection and the second orthographic projection.

[0085] In some embodiments, the barrier 140 may have a third orthographic projection on the plane where the first conductive layer 121 is located, and the third orthographic projection may be located between the first orthographic projection and the second orthographic projection. For example, the third orthographic projection may be located on the side of the first orthographic projection toward the central area 100a, and may be arranged close to the first orthographic projection, so as to alleviate the diffusion of the ablation phenomenon from the first orthographic projection to the third orthographic projection, so as to improve the defects of the appearance of the central area 100a of the electrochromic device 100. And / or, the third orthographic projection may be located on the side of the second orthographic projection toward the central area 100a, and may be arranged close to the second orthographic projection, so as to alleviate the diffusion of the ablation phenomenon from the second orthographic projection to the third orthographic projection, so as to improve the defects of the appearance of the central area 100a of the electrochromic device 100.

[0086] In some embodiments, see Figure 3 The barrier 140 may include a first barrier 141 and a second barrier 142. The third orthographic projection of the first barrier 141 may be disposed close to the first orthographic projection, and the third orthographic projection of the first barrier 141 may be located on one side of the width direction of the first orthographic projection facing the central region 100a. The third orthographic projection of the second barrier 142 may be disposed close to the second orthographic projection, and the third orthographic projection of the second barrier 142 may be located on one side of the width direction of the second orthographic projection facing the central region 100a, thereby alleviating the diffusion of the ablation phenomenon from the third orthographic projection to the central region 100a, so as to improve the appearance defects of the central region 100a of the electrochromic device 100.

[0087] Since the ablation phenomenon of the electrochromic stacked layer 130 near the first binding portion 151a is relatively serious. Figure 4 The third orthographic projection of the first blocking member 141 can be arranged close to the first orthographic projection of the first binding portion 151a, so that the ablation phenomenon caused by the first blocking member 141 on the first binding portion 151a is significantly improved.

[0088] Since the ablation phenomenon of the electrochromic stacked layer 130 near the second binding portion 152a is relatively serious. Figure 4 The third orthographic projection of the second blocking member 142 can be arranged close to the second orthographic projection of the second binding portion 152a, so that the ablation phenomenon caused by the second blocking member 142 on the second binding portion 152a is significantly improved.

[0089] In some embodiments, see Figure 6 and Figure 5, the third orthographic projection of the first barrier 141 can be arranged close to the first binding portion 151a and the first orthographic projection of the first extension portion 151b, so that the extension length of the first barrier 141 is larger, which can improve the improvement effect of the first barrier 141 on the ablation phenomenon. For example, the extension length of the first barrier 141 can be similar to the extension length of the first bus bar 151, or can be greater than the extension length of the first bus bar 151, so that the first bus bar 151 is close to the central area 100a ( Figure 4 ) can be provided with a first barrier 141 on one side thereof, so that the first barrier 141 can have a good improvement effect on the ablation phenomenon on the inner side of each location of the first bus bar 151.

[0090] In some embodiments, see Figure 6 and Figure 7 , the third orthographic projection of the second barrier 142 can be arranged close to the second orthographic projection of the second binding portion 152a and the second extension portion 152b, which can improve the improvement effect of the second barrier 142 on the ablation phenomenon. The principle has been explained and will not be repeated. For example, the extension length of the second barrier 142 can be close to the extension length of the second bus bar 152, or can be greater than the extension length of the second bus bar 152, so that the second bus bar 152 is close to the central area 100a ( Figure 4 ) can be provided with a second barrier 142 on one side thereof, so that the second barrier 142 can have a good improvement effect on the ablation phenomenon on the inner side of each location of the second bus bar 152.

[0091] See also Figure 8 In some embodiments, the first barrier 141 and the second barrier 142 can be arranged in the same layer, and the first barrier 141 and the second barrier 142 can be connected to form an annular barrier. The annular barrier has a longer extension length, which can further improve the improvement effect of the first barrier 141 and the second barrier 142 on the ablation phenomenon.

[0092] See also Fig. 9 , the electrochromic device 100 may have a spacing region A, and the spacing region A is located between the first orthographic projection of the first end 151c and the corresponding second orthographic projection of the second end 152c. The tip discharge of the first end 151c and the second end 152c may cause severe ablation of the electrochromic stacked layer 130 in the spacing region A, and the ablation phenomenon may spread along the spacing region A to the central region 100a, thereby causing appearance defects of the electrochromic device 100. In addition, the ablation phenomenon may also spread from the spacing region A to the edge region 100b. Since users pay less attention to the edge region 100b, the embodiment of the present application mainly discusses the ablation phenomenon spreading to the central region 100a.

[0093] In some embodiments, see Fig. 9The barrier 140 may include a third barrier 143, and a third orthographic projection of the third barrier 143 may be located between the first orthographic projection of the first end 151c and the corresponding second orthographic projection of the second end 152c, thereby slowing down the diffusion speed of the ablation phenomenon from the spacing area A to the central area 100a, reducing the ablation amount and ablation area caused by the diffusion, thereby alleviating the ablation phenomenon of the electrochromic stack layer and improving the appearance defects of the electrochromic device.

[0094] In the embodiment where the first barrier 141 and the second barrier 142 form an annular barrier, the annular barrier can also slow down the diffusion of the ablation phenomenon from the spacing area A to the central area 100a, thereby improving the appearance defects of the electrochromic device. In this case, the third barrier 143 may not be provided.

[0095] See also Fig. 9 When the third barrier 143 is provided in the spacing region A, due to process errors, the extension length of the third barrier 143 may be smaller than the extension length of the spacing region A, so that gaps B and C appear between the edge of the third barrier 143 and the edge of the spacing region A, resulting in the third barrier 143 being unable to improve the diffusion of the ablation phenomenon at the gaps B and C.

[0096] In some embodiments, see Figure 5 and Fig. 9 In the third barrier 143 and the first end 151c that are close to each other, the third barrier 143 may be provided with a first fitting portion 161, and the first end 151c may be provided with a second fitting portion 162. The third orthographic projection of the first fitting portion 161 and the first orthographic projection of the second fitting portion 162 may fit together, thereby avoiding the appearance of a gap B, alleviating the diffusion of the ablation phenomenon at the gap B, and improving the improvement effect of the third barrier 143 on the ablation phenomenon. For example, one of the first fitting portion 161 and the second fitting portion 162 may be a convex portion, and the other of the first fitting portion 161 and the second fitting portion 162 may be a concave portion.

[0097] In some embodiments, see Figure 5 and Fig. 9 In the third barrier 143 and the second end 152c that are close to each other, the third barrier 143 may be provided with a third fitting portion 163, and the second end 152c may be provided with a fourth fitting portion 164. The third orthographic projection of the third fitting portion 163 and the second orthographic projection of the fourth fitting portion 164 may fit together, thereby avoiding the appearance of a gap C, so as to alleviate the diffusion of the ablation phenomenon at the gap C and enhance the improvement effect of the third barrier 143 on the ablation phenomenon. For example, one of the third fitting portion 163 and the fourth fitting portion 164 may be a convex portion, and the other of the third fitting portion 163 and the fourth fitting portion 164 may be a concave portion.

[0098] The barrier 140 may be provided with at least one of the first barrier 141, the second barrier 142 and the third barrier 143. In the embodiment in which the first barrier 141, the second barrier 142 and the third barrier 143 are provided at the same time, the ablation phenomenon can be better improved.

[0099] The following describes the location of the barrier 140 when the first bus bar 151 and the second bus bar 152 provided in the embodiment of the present application are both annular.

[0100] See also Fig.10 , the first bus bar 151 and the second bus bar 152 may both be annular, and the orthographic projection of the first bus bar 151 on the plane where the first conductive layer 121 is located may at least partially overlap with the orthographic projection of the second bus bar 152 on the plane where the first conductive layer 121 is located. The barrier 140 may be located on the inner side of at least one of the first bus bar 151 and the second bus bar 152, so as to improve the ablation phenomenon and appearance defects of the electrochromic device 100, and the principle thereof has been explained and will not be repeated.

[0101] For example, the barrier 140 may be disposed at the same layer as the first bus bar 151 and located inside the first bus bar 151 . And / or, the barrier 140 may be disposed at the same layer as the second bus bar 152 and located inside the second bus bar 152 .

[0102] For example, the barrier 140 may be in a strip shape, a ring shape, or other shapes.

[0103] In some embodiments, the barrier 140 may be disposed close to at least one of the first binding portion 151a and the second binding portion 152a. In addition, the barrier 140 may be disposed close to at least one of the first extending portion 151b and the second extending portion 152b.

[0104] The material of the barrier member 140 provided in the embodiment of the present application is described below.

[0105] In some embodiments, the barrier 140 may be an insulating member formed of an insulating material. For example, the insulating material may be varnish or other materials. In other embodiments, the barrier 140 may be a conductive member formed of a conductive material. Figure 1a, the barrier 140 may include an insulating portion 145 and a conductive portion 144, and the insulating portion 145 may be located on the side of the conductive portion 144 facing the electrochromic stacked layer 130. For example, the conductive portion 144 may be provided in the same layer and material as the bus bar 150, so that the barrier 140 and the bus bar 150 may be prepared at the same time to simplify the preparation process of the electrochromic device 100. For example, the insulating portion 145 may be provided in the same layer and material as the insulating layer on the bus bar 150, so that the insulating portion 145 and the insulating layer may be prepared at the same time to simplify the preparation process of the electrochromic device 100, so that the barrier 140 does not increase the process flow, and has the advantages of mass production and low cost. Alternatively, the barrier 140 may also be prepared separately, so that the material selection range of the barrier 140 can be widened.

[0106] The thickness of the barrier 140 provided in the embodiment of the present application is described below.

[0107] In some embodiments, the thickness of the barrier 140 may be greater than or equal to the sum of the thickness of the conductive layer 120 and the insulating layer covering the conductive layer 120, thereby ensuring the barrier effect of the barrier 140. In other embodiments, the thickness of the barrier 140 may be less than the sum of the thickness of the conductive layer 120 and the insulating layer covering the conductive layer 120.

[0108] The barrier 140 provided in the embodiment of the present application has a relatively simple structure and is easy to process. It can be calculated and designed according to the actual ablation position and ablation phenomenon, and the length of the barrier 140 can be customized according to the actual projected ablation size, which is simple and convenient to implement.

[0109] The present application embodiment provides a color changing device, which may include the electrochromic device 100 in the above embodiment. The color changing device may include, but is not limited to, a rearview mirror, a curtain wall, a car sunroof, a car side window, a car windshield, architectural glass, a housing of an electronic product, glasses, a vehicle, and a display panel. The present application embodiment is described by taking the color changing device as a rearview mirror as an example.

[0110] In some embodiments, the rearview mirror may include an electrochromic device 100, the first conductive layer 121 or the second conductive layer 122 of the electrochromic device 100 may be a reflective member, and the material of the first conductive layer 121 or the second conductive layer 122 may be a reflective conductive material. Alternatively, a reflective layer may be provided on one side of the thickness direction of one of the first substrate 111 and the second substrate 112 of the electrochromic device 100.

[0111] The embodiment of the present application provides a terminal product, and the terminal product may include a color changing device. The terminal product may be a vehicle or other terminal products. The embodiment of the present application is described by taking the terminal product as a vehicle as an example. Exemplarily, the vehicle may include a vehicle body and a rearview mirror, and the rearview mirror may be installed on the vehicle body.

[0112] It should be noted here that the numerical values ​​and numerical ranges involved in the embodiments of the present application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrochromic device, characterized in that: include: A first substrate, a first conductive layer, an electrochromic stacked layer, a second conductive layer, and a second substrate are sequentially stacked, a first bus bar is disposed between the first conductive layer and the electrochromic stacked layer, a second bus bar is disposed between the second conductive layer and the electrochromic stacked layer, and a barrier is disposed between the first conductive layer and the electrochromic stacked layer and between the second conductive layer and the electrochromic stacked layer; in the electrochromic stacked layer, the thickness of the portion of the electrochromic stacked layer corresponding to the barrier, the first bus bar, and the second bus bar is less than the thickness of the remaining portion of the electrochromic stacked layer; The barrier is disposed adjacent to at least one of the first bus bar and the second bus bar; The orthographic projection of the barrier on the plane where the first conductive layer is located does not overlap with the orthographic projections of the first bus bar and the second bus bar on the plane where the first conductive layer is located.

2. The electrochromic device according to claim 1, characterized in that: The first bus bar has a first orthographic projection on the plane where the first conductive layer is located, the second bus bar has a second orthographic projection on the plane where the first conductive layer is located, and the barrier has a third orthographic projection on the plane where the first conductive layer is located; The first orthographic projection and the second orthographic projection are both strip-shaped, and there is a distance between the first orthographic projection and the second orthographic projection, and the third orthographic projection is located between the first orthographic projection and the second orthographic projection.

3. The electrochromic device according to claim 2, characterized in that: The blocking member includes a first blocking member and a second blocking member, the third orthographic projection of the first blocking member is arranged close to the first orthographic projection and is located on one side of the width direction of the first orthographic projection, and the third orthographic projection of the second blocking member is arranged close to the second orthographic projection and is located on one side of the width direction of the second orthographic projection.

4. The electrochromic device according to claim 3, characterized in that: The first bus bar includes a first binding portion, and the second bus bar includes a second binding portion; The third orthographic projection of the first blocking member is disposed close to the first orthographic projection of the first binding portion, and the third orthographic projection of the second blocking member is disposed close to the second orthographic projection of the second binding portion.

5. The electrochromic device according to claim 4, characterized in that: The first bus bar includes a first extension portion connected to the first binding portion, and the second bus bar includes a second extension portion connected to the second binding portion; The third orthographic projection of the first blocking member is disposed close to the first orthographic projection of the first extending portion, and the third orthographic projection of the second blocking member is disposed close to the second orthographic projection of the second extending portion.

6. The electrochromic device according to claim 3, characterized in that: The first barrier member and the second barrier member are arranged in the same layer and connected to form a ring.

7. The electrochromic device according to any one of claims 2 to 6, characterized in that: The barrier comprises a third barrier, two ends of the first bus bar in the extension direction are first ends, two ends of the second bus bar in the extension direction are second ends, and the first orthographic projections of the two first ends and the second orthographic projections of the two second ends are arranged in a one-to-one correspondence with each other; The third orthographic projection of the third barrier is located between the first orthographic projection of the first end and the corresponding second orthographic projection of the second end.

8. The electrochromic device according to claim 7, characterized in that: In the third blocking member and the first end which are close to each other, the third blocking member is provided with a first embedding portion, the first end is provided with a second embedding portion, and the third orthographic projection of the first embedding portion and the first orthographic projection of the second embedding portion are mutually embedded; And / or, in the third blocking member and the second end which are close to each other, the third blocking member is provided with a third embedding portion, the second end is provided with a fourth embedding portion, and the third orthographic projection of the third embedding portion and the second orthographic projection of the fourth embedding portion are embedded with each other.

9. The electrochromic device according to claim 1, characterized in that: The first bus bar and the second bus bar are both annular, and an orthographic projection of the first bus bar on the plane where the first conductive layer is located at least partially overlaps with an orthographic projection of the second bus bar on the plane where the first conductive layer is located; The barrier is located inside at least one of the first bus bar and the second bus bar.

10. The electrochromic device according to any one of claims 1 to 6, characterized in that: Along the direction from the first conductive layer to the second conductive layer, the electrochromic stack layer includes an electrochromic layer, an electrolyte layer and an ion storage layer stacked in sequence; The barrier is located between the first conductive layer and the electrochromic layer, and the thickness of the electrochromic layer corresponding to the barrier and the first bus bar is smaller than the thickness of the remaining electrochromic layer; And / or, the barrier is located between the second conductive layer and the ion storage layer, and a thickness of a portion of the ion storage layer corresponding to the barrier and the second bus bar is smaller than a thickness of a remaining portion of the ion storage layer.

11. The electrochromic device according to any one of claims 1 to 6, characterized in that: The barrier member is an insulating member; Alternatively, the barrier member is a conductive member; Alternatively, the barrier comprises an insulating portion and a conductive portion, and the insulating portion is located on a side of the conductive portion facing the electrochromic stacked layer.

12. A rearview mirror, characterized in that: include: The electrochromic device described in any one of claims 1 to 11, wherein the first conductive layer or the second conductive layer of the electrochromic device is a reflective member, or a reflective layer is provided on one side in the thickness direction of one of the first substrate and the second substrate of the electrochromic device.

13. A vehicle, characterized in that: include: A vehicle body and the rearview mirror as claimed in claim 12, wherein the rearview mirror is mounted on the vehicle body.

Images