An electrochromic device and an electronic terminal

Abstract

The present invention provides an electrochromic device and an electronic terminal. The device includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer that are sequentially stacked; the first conductive layer includes a first conductive region and a second conductive region, and at least part of the edge of the second conductive region is not in contact with the edge of the first conductive region, and the conductivity of the first conductive region and the second conductive region is different; and / or, the second conductive layer includes a third conductive region and a fourth conductive region, and at least part of the edge of the fourth conductive region is not in contact with the edge of the third conductive region, and the conductivity of the third conductive region and the fourth conductive region is different. By adding a new conductive region on the basis of the original conductive region, the present invention presents the aesthetic effects of various patterns and colors. At the same time, the addition of the new conductive region eliminates the need to separately provide a peripheral bus bar, and thus eliminates the need to provide a shielding layer, and greatly improves the color change speed of the electrochromic device.

Description

Technical Field

[0001] The present invention belongs to the technical field of color-changing devices, and relates to an electrochromic device and an electronic terminal. Background Art

[0002] Electrochromism refers to the phenomenon that under the action of an external electric field, ions are embedded into the material, causing reversible changes in the valence state and chemical composition of the material, thereby leading to reversible changes in the optical properties of the material. There are many kinds of electrochromic materials, mainly including transition metal oxides, conductive polymers, small molecule dyes, and complexes, etc. Electrochromic devices assembled from electrochromic materials have a wide range of applications, such as smart windows, anti-glare rearview mirrors, aerospace thermal control, and aircraft windows. Therefore, the research on new preparation technologies for safe, reliable, and low-cost electrochromic devices is of great significance.

[0003] An electrochromic device usually includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer that are stacked in sequence. Among them, the first / second conductive layer usually uses transparent ITO material. Since the conductivity of ITO is relatively low, the surface resistance of the first / second conductive layer is relatively large, which results in uneven color change of the electrochromic device, fast color change at the edge, slow color change in the middle, and a relatively long time required for the device to complete color change as a whole. In the prior art, in order to reduce the surface resistance of the conductive layer, a bus bar is provided at the edge of the first / second conductive layer. The bus bar usually uses a highly conductive material (such as silver paste, copper wire, etc.), and for aesthetics, an additional shielding layer is required at the edge to shield the bus bar. The process of the prior art is complex, the production cost is relatively high, and the problem of fast color change at the edge and slow color change in the middle still cannot be solved.

[0004] Therefore, how to improve the aesthetic effect of the electrochromic device and at the same time increase the color change speed of the electrochromic device is a technical problem to be solved urgently. Summary of the Invention

[0005] The purpose of the present invention is to provide an electrochromic device and an electronic terminal. By adding a new conductive area on the basis of the original conductive area, and at least part of the new conductive area is in the non-edge area of the original conductive area, the color change speed of the central area of the electrochromic device can be greatly increased, and no additional edge bus bar is provided, so there is no need to set an edge shielding layer, which greatly simplifies the production process and reduces the production cost.

[0006] To achieve the purpose of this invention, the following technical solutions are adopted:

[0007] In a first aspect, the present invention provides an electrochromic device, which includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer that are stacked in sequence;

[0008] The first conductive layer includes a first conductive region and a second conductive region. The second conductive region is at least partially non - contacting with the edge of the first conductive region, and the conductivity of the first conductive region and the second conductive region is different;

[0009] and / or,

[0010] The second conductive layer includes a third conductive region and a fourth conductive region. The fourth conductive region is at least partially non - contacting with the edge of the third conductive region, and the conductivity of the third conductive region and the fourth conductive region is different.

[0011] It should be noted that in the present invention, the edge of the first conductive region refers to the outer peripheral edge of the first conductive region, and the edge of the third conductive region refers to the outer peripheral edge of the third conductive region. At least partially non - contacting includes the cases of all non - contacting and partial contacting and partial non - contacting.

[0012] Meanwhile, the present invention does not particularly limit the shapes of the second conductive region and the fourth conductive region, and they can be arbitrarily adjusted according to actual needs. For example, they can be circular, square, star - shaped, etc.

[0013] The electrochromic device provided by the present invention, by adding new conductive regions (the second conductive region and / or the fourth conductive region) with different conductivities on the basis of the original conductive regions (the first conductive region and / or the third conductive region), and the new conductive regions are at least partially in the non - edge regions of the original conductive regions, can greatly improve the color - change speed of the central region of the electrochromic device, and no longer additionally set bus bars at the edges, and thus there is no need to set edge shielding layers, greatly simplifying the production process and reducing the production cost.

[0014] Preferably, the edge of the first conductive region is a region with a distance less than or equal to 10 mm from the outer edge of the first conductive region, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc., and the edge of the third conductive region is a region with a distance less than or equal to 10 mm from the outer edge of the third conductive region, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc.

[0015] In the present invention, in the first conductive layer, a region with a distance greater than 10 mm from the outer edge of the first conductive region is the internal region, such as 15 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm or 60 mm, etc., and then the second conductive region is partially or entirely located in this internal region, so that the second conductive region can be set in a relatively large area, and specific patterns can be set according to specific product requirements, thus playing the role of improving the color - change speed and enriching the appearance effect.

[0016] Preferably, the edge of the first conductive region is a region where the distance from the outer edge of the first conductive region is less than or equal to 20 mm, such as 1 mm, 5 mm, 10 mm, 15 mm or 20 mm, etc. The edge of the third conductive region is a region where the distance from the outer edge of the third conductive region is less than or equal to 20 mm, such as 1 mm, 5 mm, 10 mm, 15 mm or 20 mm, etc.

[0017] In the present invention, in the first conductive layer, the region where the distance from the outer edge of the first conductive region is greater than 20 mm is the internal region, and then the second conductive region is partially or wholly located in this internal region. Thus, the second conductive region can be arranged in a relatively large area, and the specific pattern can be set according to the specific product requirements. The pattern is more centered, thereby improving the color change speed and emphasizing the appearance effect.

[0018] Preferably, the first conductive region and the second conductive region have different colors.

[0019] Preferably, the third conductive region and the fourth conductive region have different colors.

[0020] In the present invention, by having a color difference distinguishable by the human eye between the first conductive region and the second conductive region, and designing the second conductive region into a preset pattern, a rich visual experience of the appearance can be obtained. In this case, there is no need to provide an occlusion layer as in the prior art. Further, in the present invention, by having a color difference distinguishable by the human eye between the third conductive region and the fourth conductive region, and designing the fourth conductive region into a preset pattern, a rich visual experience of the appearance can be obtained. In this case, there is no need to provide an occlusion layer as in the prior art.

[0021] Preferably, the color of the second conductive region is the same as the color of the electrochromic layer at a preset transmittance.

[0022] In the present invention, under the action of an external voltage, the transmittance of the electrochromic layer changes. When the transmittance changes to the preset transmittance, the color of the second conductive region is the same as the color of the electrochromic layer at the preset transmittance. Then, when the user views from the outside of the electrochromic device, the pattern of the second conductive region is integrated into the background color of the electrochromic layer, and the user cannot see the pattern of the second conductive region. When the transmittance is not at the preset transmittance, the pattern of the second conductive region can be distinguished from the background color of the electrochromic layer, and the user can see the pattern of the second conductive region. The electrochromic layer can be adjusted according to the color of the second conductive region. When the color of the second conductive region is integrated into the background color of the electrochromic layer, the transmittance of the electrochromic layer at this time is the preset transmittance.

[0023] Preferably, the fourth conductive region has the same color as the electrochromic layer at the preset transmittance.

[0024] In the present invention, under the action of an external voltage, the transmittance of the electrochromic layer changes. When the transmittance changes to the preset transmittance, the color of the fourth conductive region is the same as the color of the electrochromic layer at the preset transmittance. Then, when viewed from the outside of the electrochromic device by the user, the pattern of the fourth conductive region is integrated into the background color of the electrochromic layer, and the user cannot see the pattern of the fourth conductive region. When the transmittance is not at the preset transmittance, the pattern of the fourth conductive region can be distinguished from the background color of the electrochromic layer, and the user can see the pattern of the fourth conductive region. The electrochromic layer can be adjusted according to the color of the fourth conductive region. When the color of the fourth conductive region is integrated into the background color of the electrochromic layer, the transmittance of the electrochromic layer at this time is the preset transmittance.

[0025] Preferably, the electrochromic device further includes a color layer;

[0026] Preferably, the color layer is located on the outer side of the second base layer;

[0027] Preferably, the color of the color layer is the same as the color of the second conductive region.

[0028] In the present invention, the electrochromic layer usually switches between a transparent state and a colored state with different transmittances. The color layer can serve as the background color of the electrochromic device. When viewed from the outside of the first base layer by the user, the color layer can be superimposed on the color of the electrochromic layer, thereby enriching the viewing effect of the electrochromic device.

[0029] When the color of the color layer is the same as the color of the second conductive region, when the electrochromic layer switches to transparent, the pattern of the second conductive region is integrated into the background color of the color layer, and the user cannot see the pattern of the second conductive region. When the electrochromic layer switches to a non-transparent colored state, the color of the electrochromic layer is superimposed on the background color of the color layer, and then the pattern of the second conductive region will be displayed, and at this time the user can see the pattern of the second conductive region. Thus, the interestingness of the pattern appearance performance of the electrochromic device is greatly improved.

[0030] Preferably, the conductivity of the second conductive region is higher than the conductivity of the first conductive region.

[0031] In the present invention, the conductivity of the second conductive region is higher than that of the first conductive region, and at least a part of the second conductive region is located in the non-edge region of the first conductive layer, so that the color change speed of the central region of the electrochromic device can be greatly improved, thereby reducing the time required for the electrochromic device to complete the overall color change.

[0032] Preferably, the conductivity of the fourth conductive region is higher than that of the third conductive region.

[0033] In the present invention, the conductivity of the fourth conductive region is higher than that of the third conductive region, and at least a part of the fourth conductive region is located in the non-edge region of the second conductive layer, so that the color change speed in the central region of the electrochromic device can be greatly improved, thereby reducing the time required for the electrochromic device to complete the overall color change.

[0034] Preferably, the materials of the first conductive region and the third conductive region independently include any one or a combination of at least two of indium tin oxide, aluminum zinc oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids or silver nanoparticles.

[0035] Preferably, the materials of the second conductive region and the fourth conductive region independently include any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire or conductive film.

[0036] In the present invention, the materials of the first and third conductive regions are transparent conductive materials, and the materials of the second and fourth conductive regions have a certain color, so that a very obvious color difference visible to the naked eye is formed between the two conductive regions. The second conductive region and / or the fourth conductive region can be set into a preset pattern, so that when the user views from the outside, rich appearance effects can be seen. Moreover, the conductivity of the materials of the second conductive region and the fourth conductive region is relatively high, greatly reducing the surface resistance of the first conductive layer / second conductive layer, which can improve the color change speed of the electrochromic device and the color change speed inside the electrochromic device, and improve the color change uniformity of the overall device.

[0037] Preferably, the materials of the first substrate layer and the second substrate layer independently include transparent glass and / or polymer materials.

[0038] Preferably, the polymer material includes a flexible material.

[0039] Preferably, the flexible material includes any one or a combination of at least two of polyethylene terephthalate, cycloolefin copolymer or cellulose triacetate.

[0040] Preferably, the maximum width of the second conductive region and the fourth conductive region is greater than 5 mm, such as 5 mm, 10 mm, 15 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 30 mm, 35 mm or 40 mm, etc., and preferably greater than 20 mm.

[0041] The width value defined in the present invention is the width corresponding to the second and fourth conductive regions. Regardless of the shape, there will be a maximum width value.

[0042] In the present invention, when the maximum width value is within the above range, it is beneficial to minimize the sheet resistance of the non-edge regions of the second conductive region and / or the fourth conductive region as much as possible, and it is also convenient for pattern design, with a strong visual impact on the user. If the maximum width is too small, on the one hand, the effect of reducing the sheet resistance of the non-edge regions is limited, and on the other hand, it is not easy for pattern design.

[0043] Preferably, the type of the electrochromic layer includes any one or a combination of at least two of PDLC, SPD, or EC.

[0044] Preferably, the EC includes a color-changing material layer, an electrolyte layer, and a counter electrode layer that are sequentially stacked.

[0045] Preferably, the second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region, or located on the surface of the first conductive region.

[0046] Preferably, the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located on the surface of the third conductive region.

[0047] Preferably, at least one lead-out electrode is connected to the second conductive region, and / or at least one lead-out electrode is connected to the fourth conductive region.

[0048] In the present invention, the lead-out electrode is connected to an external power supply to control the voltage of the electrochromic layer, and at different voltages, the electrochromic layer exhibits different transmittances.

[0049] Preferably, on the surface of the first base layer, the projections of the second conductive region and the fourth conductive region do not overlap, partially overlap, or completely overlap.

[0050] In the present invention, by adjusting the positional relationship between the second conductive region and the fourth conductive region, a rich appearance effect is achieved.

[0051] In a second aspect, the present invention further provides an electronic terminal including the above electrochromic device.

[0052] Exemplarily, a preparation method of the above electrochromic device is provided, and the preparation method specifically includes the following steps:

[0053] 1. Forming a first conductive layer on a first base layer: forming a first conductive region on the first base layer by magnetron sputtering (or vacuum evaporation deposition, sol-gel, chemical vapor deposition, etc.); in a preset region of the first conductive layer, attaching a second conductive material through a conductive adhesive to form a second conductive region;

[0054] Form a second conductive layer on the second base layer by the same method;

[0055] 2. Coat an electrochromic layer on the first conductive layer: Dissolve 500 mg of poly(3-hexylthiophene) (P3HT) in 10 mL of o-xylene, stir magnetically for 10 h, and then drop the resulting solution onto the first conductive layer and spin-coat to form a color-changing material layer;

[0056] 3. Coat a counter electrode layer on the second conductive layer: Dissolve 500 mg of tungsten trioxide in 20 mL of deionized water, stir and filter, and then drop the resulting solution onto the second conductive layer and spin-coat to form a tungsten trioxide coating to obtain a counter electrode layer;

[0057] 4. Preparation of electrochromic device: Mix lithium perchlorate with a mass percentage of 20 wt%, methyl methacrylate with a mass percentage of 59.9 wt%, 20% propylene carbonate, and azobisisobutyronitrile with a mass percentage of 0.1 wt%, coat it on the counter electrode layer to form an electrolyte coating; then cover the above color-changing material layer (together with the first base layer) on the electrolyte coating, and cure it by ultraviolet light to form a solid-state electrolyte layer; finally, obtain an electrochromic device.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] The electrochromic device provided by the present invention, by adding a new conductive region with a different conductivity on the basis of the original conductive region, and at least part of the new conductive region is in the non-edge region of the original conductive region, can greatly improve the color-changing speed of the central region of the electrochromic device, and no additional edge busbars are provided, and thus no edge shielding layer needs to be provided, greatly simplifying the production process and reducing the production cost. Brief Description of the Drawings

[0060] Figure 1 It is a schematic structural diagram of the electrochromic device provided in Example 1.

[0061] Figure 2 It is a schematic diagram of the first conductive layer in Example 1.

[0062] Figure 3 It is a schematic diagram of the second conductive layer in Example 1.

[0063] Figure 4 It is a schematic diagram of the effect of the electrochromic device provided in Example 1.

[0064] Figure 5 It is a schematic structural diagram of the electrochromic device provided in Example 2.

[0065] Figure 6 It is a schematic diagram of the first conductive layer in Example 2.

[0066] Figure 7 Schematic diagram of the second conductive layer in Example 2.

[0067] Figure 8 Schematic diagram of the effect of the electrochromic device provided in Example 2.

[0068] Figure 9 Schematic diagram of the structure of the electrochromic device provided in Example 3.

[0069] Figure 10 Schematic diagram of the first conductive layer in Example 3.

[0070] Figure 11 Schematic diagram of the second conductive layer in Example 3.

[0071] Figure 12 Schematic diagram of the structure of the electrochromic device provided in Example 4.

[0072] Figure 13 Schematic diagram of the first conductive layer in Example 4.

[0073] Figure 14 Schematic diagram of the second conductive layer in Example 4.

[0074] Figure 15 Schematic diagram of a partial structure of the electrochromic device provided in Example 5.

[0075] 1 - First base layer, 2 - First conductive layer, 3 - Electrochromic layer, 4 - Second conductive layer, 5 - Second base layer, 6 - End (second conductive region), 7 - End (fourth conductive region), 8 - Color layer, 21 - First conductive region, 22 - Second conductive region, 41 - Third conductive region, 42 - Fourth conductive region. Detailed implementation manners

[0076] The embodiments of the present invention will be described in detail below, where the same or similar reference numerals represent the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0077] In the description of the present invention, unless otherwise clearly specified and defined, the terms "connected", "connected", and "installed" should be understood in a broad sense. For example, it can be an installation connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first feature and the second feature, or may include contact between the first feature and the second feature through additional features therebetween without direct contact. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0079] The technical solution of the present invention will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0080] In a specific embodiment, the present invention provides an electrochromic device, which includes a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer stacked in sequence;

[0081] The first conductive layer includes a first conductive region and a second conductive region, and at least part of the edge of the second conductive region is not in contact with the edge of the first conductive region, and the conductivity of the first conductive region and the second conductive region is different;

[0082] and / or,

[0083] The second conductive layer includes a third conductive region and a fourth conductive region, and at least part of the edge of the fourth conductive region is not in contact with the edge of the third conductive region, and the conductivity of the third conductive region and the fourth conductive region is different.

[0084] The edge of the first conductive region is a region where the distance from the outer edge of the first conductive region is less than or equal to 10 mm, and the edge of the third conductive region is a region where the distance from the outer edge of the third conductive region is less than or equal to 10 mm; further, the edge of the first conductive region is a region where the distance from the outer edge of the first conductive region is less than or equal to 20 mm, and the edge of the third conductive region is a region where the distance from the outer edge of the third conductive region is less than or equal to 20 mm.

[0085] The first conductive region and the second conductive region have different colors, and the third conductive region and the fourth conductive region have different colors.

[0086] The color of the second conductive region is the same as the color of the electrochromic layer at a preset transmittance, and the fourth conductive region is the same as the color of the electrochromic layer at a preset transmittance.

[0087] Further, the electrochromic device further includes a color layer, which is located on the outer side of the second base layer, and the color of the color layer is the same as that of the second conductive region.

[0088] The materials of the first conductive region and the third conductive region each independently include any one or a combination of at least two of indium tin oxide, aluminum zinc oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal meshes, or silver nanoparticles; the materials of the second conductive region and the fourth conductive region each independently include any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire, or conductive adhesive film; the materials of the first base layer and the second base layer each independently include transparent glass and / or polymer materials; the polymer materials include flexible materials; the flexible materials include any one or a combination of at least two of polyethylene terephthalate, cycloolefin copolymer, or triacetyl cellulose.

[0089] The conductivity of the second conductive region is higher than that of the first conductive region; the conductivity of the fourth conductive region is higher than that of the third conductive region.

[0090] The types of the electrochromic layer include any one or a combination of at least two of PDLC, SPD, or EC; EC includes a color-changing material layer, an electrolyte layer, and a counter electrode layer stacked in sequence.

[0091] The thicknesses of the first conductive layer and the second conductive layer are each independently 0.1 - 10 μm; the maximum width of the second conductive region and the fourth conductive region is greater than 5 mm.

[0092] The second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region, or located on the surface of the first conductive region; the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located on the surface of the third conductive region.

[0093] The second conductive region is connected to at least one lead electrode, the fourth conductive region is connected to at least one lead electrode, and the lead electrode is connected to an external power source.

[0094] On the surface of the first base layer, the projections of the second conductive region and the fourth conductive region do not overlap, partially overlap, or completely overlap.

[0095] Example 1

[0096] This example provides an electrochromic device based on the electrochromic device provided in the specific implementation manner:

[0097] Such as Figure 1 、 Figure 2 、 Figure 3 And Figure 4As shown, the electrochromic device includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second base layer 5 that are stacked in sequence. The material of the first base layer 1 is PET (polyethylene terephthalate), the material of the second base layer 5 is PET, and the type of the electrochromic layer 3 is EC;

[0098] The material of the first conductive region 21 is indium tin oxide, the material of the second conductive region 22 is copper, the second conductive region 22 is completely embedded in the first conductive region 21, and the maximum width is 20 mm. As Figure 2 and Figure 4 shown, the region 10 mm away from the outer edge of the first conductive region 21 is the edge of the first conductive region 21. The end 6 (the second conductive region 22) contacts the edge of the first conductive region 21, and other parts of the second conductive region 22 (such as Figure 2 the tree-shaped leaf crown and the upper part of the tree trunk in

[0099] do not contact the edge of the first conductive region 21; a first lead electrode is connected at the end 6 (the second conductive region 22); Figure 3 and Figure 4 shown, the region 10 mm away from the outer edge of the third conductive region 41 is the edge of the third conductive region 41. The end 7 (the fourth conductive region 42) contacts the edge of the third conductive region 41, and other parts of the fourth conductive region 42 (such as Figure 3 the tree-shaped leaf crown and the upper part of the tree trunk in

[0100] do not contact the edge of the third conductive region 41; a second lead electrode is connected at the end 7 (the fourth conductive region 42); Figure 4 As Figure 4 shown, on the surface of the first base layer 1, the projections of the second conductive region 22 and the fourth conductive region 42 partially overlap. The external power supply applies a voltage to the electrochromic layer 3 by connecting the first lead electrode and the second lead electrode, so that ions are deinserted / inserted in the color-changing material layer, shuttle in the electrolyte layer, and are inserted / deinserted in the counter electrode layer, thereby changing the transmittance of the color-changing material layer. Then, the electrochromic layer 3 is switched between different transmittance states. By respectively arranging the second conductive region 22 and the fourth conductive region 42 on the first conductive layer 2 and the second conductive layer 4, since the conductivity of the material copper of the second conductive region 22 and the fourth conductive region 42 is much greater than that of indium tin oxide, the surface resistance of the first conductive layer 2 and the second conductive layer 4 is greatly reduced, thereby greatly improving the color-changing speed of the central region of the electrochromic device, greatly improving the overall color-changing speed of the electrochromic device, and reducing the time required for the electrochromic device to change color uniformly as a whole.

[0101] The following describes the appearance effect of this embodiment. Referring to Figure 4 , taking the case where a blue electrochromic material is used and the transmittance of the electrochromic layer 3 varies from 10% to 70% as an example, when viewed from the outside of the first base layer 1 by the user, when the transmittance is 70%, the user can see that on a nearly transparent and colorless substrate (such as Figure 4 the area other than the tree structure in ), there are two yellow trees (corresponding to the pattern shapes of the second conductive region 22 and the fourth conductive region 42); when the transmittance is 10%, the user can see that on the blue substrate, there is a yellow tree (corresponding to the pattern shape of the second conductive region 22), and a blue-greenish tree (corresponding to the pattern shape of the fourth conductive region 42), where the blue-green is a color obtained by superimposing the blue of the electrochromic layer 3 and the yellow of the material of the fourth conductive region.

[0102] Embodiment 2

[0103] This embodiment provides an electrochromic device based on the electrochromic device provided in the specific implementation manner:

[0104] As Figure 5 , 6, Figure 7 and Figure 8 shown, the electrochromic device includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second base layer 5 that are sequentially stacked. The material of the first base layer 1 is PET (polyethylene terephthalate), the material of the second base layer 5 is PET, and the type of the electrochromic layer 3 is PDLC;

[0105] The material of the first conductive region 21 is fluorine-doped tin oxide, the material of the second conductive region 22 is a conductive adhesive film, the second conductive region 22 is completely embedded in the first conductive region 21, and the maximum width is 30 mm. As Figure 6 and Figure 8 shown, the area 10 mm away from the outer edge of the first conductive region 21 is the edge of the first conductive region 21. The end 6 (the second conductive region 22) contacts the edge of the first conductive region 21, and the other parts of the second conductive region 22 (such as Figure 6 the tree crown and the trunk of the tree in ) do not contact the edge of the first conductive region 21; a first lead electrode is connected at the end 6 (the second conductive region 22);

[0106] The material of the third conductive region 41 is fluorine-doped tin oxide, the material of the fourth conductive region 42 is a conductive adhesive film, the fourth conductive region 42 is completely embedded in the third conductive region 41, and the maximum width is 30 mm. As Figure 7 and Figure 8As shown, the area 10 mm away from the outer edge of the third conductive region 41 is the edge of the third conductive region 41. The end 7 (the fourth conductive region 42) is in contact with the edge of the third conductive region 41, and other parts of the fourth conductive region 42 (such as Figure 7 the rhombus and the extended part of the rhombus in

[0107] are not in contact with the edge of the third conductive region 41. A second lead electrode is connected at the end 7 (the fourth conductive region 42);

[0108] The control method of the electrochromic device is as follows:

[0109] The external power supply applies a voltage to the electrochromic layer 3 by connecting the first lead electrode and the second lead electrode, so that ions are extracted / inserted in the color-changing material layer, shuttle in the electrolyte layer, and are inserted / extracted in the counter electrode layer, thereby changing the transmittance of the color-changing material layer. Then, the electrochromic layer 3 is switched between different transmittance states. By respectively providing the second conductive region 22 and the fourth conductive region 42 on the first conductive layer 2 and the second conductive layer 4, since the conductivity of the conductive adhesive film of the materials of the second conductive region 22 and the fourth conductive region 42 is much greater than that of fluorine-doped tin oxide, the surface resistance of the first conductive layer 2 and the second conductive layer 4 is greatly reduced, thereby greatly increasing the color-changing speed of the central region of the electrochromic device, greatly increasing the overall color-changing speed of the electrochromic device, reducing the time required for the electrochromic device to change color uniformly as a whole, and at the same time, the second conductive region 22 and the fourth conductive region 42 are different patterns, presenting different aesthetic effects.

[0110] Example 3

[0111] This example provides an electrochromic device based on the electrochromic device provided in the specific implementation manner:

[0112] As Figure 9 , Figure 10 and Figure 11 shown, the electrochromic device includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, a second base layer 5, and a color layer 8 which are sequentially stacked. The material of the first base layer 1 is PET, the material of the second base layer 5 is PET, the type of the electrochromic layer 3 is PDLC; the color of the color layer 8 is consistent with that of the second conductive region 22;

[0113] The material of the first conductive region 21 is fluorine-doped tin oxide, the material of the second conductive region 22 is conductive copper foil, the second conductive region 22 is completely embedded in the first conductive region 21, and the maximum width is 50 mm; as Figure 10As shown, the area 20 mm away from the outer edge of the first conductive region 21 is the edge of the first conductive region 21. The pattern shape of the second conductive region 22 is in the shape of an "A". The two ends at the bottom of the "A" shape are in contact with the edge of the first conductive region 21, and the other parts of the second conductive region 22 (including the upper part of the "A" shape of the pattern) are not in contact with the edge of the first conductive region 21; the first lead electrode can be led out from one end at the bottom of the "A" shape. There is only a third conductive region 41 on the second conductive layer 4. The material of the third conductive region 41 is indium tin oxide, and the second lead electrode is directly led out from the edge of the third conductive region 41.

[0114] The external power supply applies a voltage to the electrochromic layer 3 by connecting the first lead electrode and the second lead electrode, so that ions are extracted / inserted in the color-changing material layer, shuttle in the electrolyte layer, and are inserted / extracted in the counter electrode layer, thereby changing the transmittance of the color-changing material layer. Then, the electrochromic layer 3 is switched between different transmittance states. By providing the second conductive region 22 on the first conductive layer 2, since the conductivity of the material copper of the second conductive region 22 is much greater than that of indium tin oxide, the surface resistance of the first conductive layer 2 is greatly reduced, thereby greatly increasing the color-changing speed of the central region of the electrochromic device, greatly increasing the overall color-changing speed of the electrochromic device, and reducing the time required for the electrochromic device to change color uniformly as a whole.

[0115] The following describes the appearance effect of this embodiment. Taking the use of a blue electrochromic material and the transmittance of the electrochromic layer 3 changing between 10% and 70% as an example, when viewed from the outside of the first base layer 1 by the user, when the transmittance is 70%, the electrochromic layer 3 is almost colorless and transparent, and the user can see that the overall electrochromic device is yellow as a whole. At this time, the "A"-shaped pattern of the second conductive region 22 can hardly be seen. Since the color layer 8 is yellow, the "A"-shaped material of the second conductive region 22 is also yellow; when the transmittance is 10%, the color of the electrochromic layer 3 is blue, and the user can see an "A"-shaped pattern on the blue-green base color, where the blue-green base color is the color obtained by superimposing the blue of the electrochromic layer 3 and the yellow of the color layer 8. Through the combination of the color of the second conductive layer 4 and the color of the base layer, rich appearance visual effects can be achieved.

[0116] Embodiment 4

[0117] This embodiment provides an electrochromic device based on the electrochromic device provided in the specific implementation manner:

[0118] As Figure 12 、 Figure 13 and Figure 14As shown, the electrochromic device includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second base layer 5 that are stacked in sequence. The material of the first base layer 1 is PET, and the type of the electrochromic layer 3 is EC;

[0119] As Figure 13 shown, there is only a first conductive region 21 on the first conductive layer 2. The material of the first conductive region 21 is indium tin oxide, and the first lead electrode is directly led out from the edge of the first conductive region 21. As Figure 14 shown, on the second conductive layer 4, the region 20 mm away from the outer edge of the third conductive region 41 is the edge of the third conductive region 41. The material of the third conductive region 41 is indium tin oxide, and the material of the fourth conductive region 42 is copper. In this embodiment, the pattern shape of the fourth conductive region 42 is an "A" shape. The two ends of the bottom of the "A" shape are in contact with the edge of the third conductive region 41, and the other parts of the fourth conductive region 42 (including the upper part of the pattern shape "A") are not in contact with the edge of the third conductive region 41; the second lead electrode can be led out from one end of the bottom of the "A" shape. The fourth conductive region 42 is completely embedded in the third conductive region 41, and the maximum width is 30 mm.

[0120] The external power supply applies a voltage to the electrochromic layer 3 by connecting the first lead electrode and the second lead electrode, so that ions are extracted / inserted in the color-changing material layer, shuttle in the electrolyte layer, and are inserted / extracted in the counter electrode layer, thereby changing the transmittance of the color-changing material layer. Then, the electrochromic layer 3 is switched between different transmittance states. By providing the fourth conductive region 42 on the second conductive layer 4, since the conductivity of the material copper of the second conductive region 22 is much greater than that of indium tin oxide, the surface resistance of the second conductive layer 4 is greatly reduced, thereby greatly improving the color-changing speed of the central region of the electrochromic device, greatly improving the overall color-changing speed of the electrochromic device, and reducing the time required for the electrochromic device to change color to uniform as a whole.

[0121] The following describes the appearance effect of this embodiment. Taking the use of a yellow electrochromic material and the transmittance of the electrochromic layer 3 changing between 10% and 70% as an example, when the user views from the outside of the first base layer 1, when the transmittance is 70%, the electrochromic layer 3 is almost colorless and transparent, and the user can see a yellow "A"-shaped pattern; when the transmittance is 10%, the entire electrochromic device is integrally yellow, and at this time, it is almost impossible to see the "A"-shaped pattern of the second conductive region 22. Since the color of the electrochromic layer 3 is yellow and the material of the "A" shape of the second conductive region 22 is also yellow. Through the combination of the color of the second conductive layer 4 and the color of the electrochromic layer 3, rich appearance visual effects can be achieved.

[0122] In other embodiments, a second conductive region having the same color as the electrochromic layer may also be provided in the first conductive layer, and the effects described in this embodiment can also be achieved.

[0123] Embodiment 5

[0124] This embodiment provides an electrochromic device based on the electrochromic device provided in the specific implementation manner:

[0125] As Figure 15 shown, in the first conductive layer 2 of the electrochromic device, the second conductive region 22 is located on the surface of the first conductive region 21.

[0126] Similarly, in the second conductive layer 4 of the electrochromic device, the fourth conductive region 42 may also be located on the surface of the third conductive region 41.

[0127] In the foregoing Embodiments 1-4, the first conductive layer 2 and / or the second conductive layer 4 of this embodiment may also be employed.

[0128] As can be seen from the above embodiments, the electrochromic device provided by the present invention can achieve diverse patterns and colors, presenting different appearance effects; and by adding new conductive regions with different conductivities on the basis of the original conductive regions, at least part of the new conductive regions is in the non-edge region of the original conductive regions, thereby greatly improving the color change speed of the central region of the electrochromic device, and no additional edge busbars are provided, and thus no edge shielding layer needs to be provided, greatly simplifying the production process and reducing the production cost.

[0129] The applicant declares that the above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention fall within the protection scope and the disclosure scope of the present invention.

Claims

1. An electrochromic device, characterized in that, the device includes a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer which are sequentially stacked; the first conductive layer includes a first conductive region and a second conductive region, the second conductive region is at least partially non - contacting with the edge of the first conductive region, the second conductive region is partially or entirely located in the inner region of the first conductive region, the conductivity of the first conductive region and the second conductive region is different, and the conductivity of the second conductive region is higher than that of the first conductive region; the second conductive layer includes a third conductive region and a fourth conductive region, the fourth conductive region is at least partially non - contacting with the edge of the third conductive region, the fourth conductive region is partially or entirely located in the inner region of the third conductive region, the conductivity of the third conductive region and the fourth conductive region is different, and the conductivity of the fourth conductive region is higher than that of the third conductive region.

2. The electrochromic device according to claim 1, characterized in that, the edge of the first conductive region is a region where the distance from the outer edge of the first conductive region is less than or equal to 10 mm, and the edge of the third conductive region is a region where the distance from the outer edge of the third conductive region is less than or equal to 10 mm.

3. The electrochromic device according to claim 1, characterized in that, the edge of the first conductive region is a region where the distance from the outer edge of the first conductive region is less than or equal to 20 mm, and the edge of the third conductive region is a region where the distance from the outer edge of the third conductive region is less than or equal to 20 mm.

4. The electrochromic device according to any one of claims 1 - 3, characterized in that, the first conductive region and the second conductive region have different colors; and / or, the third conductive region and the fourth conductive region have different colors.

5. The electrochromic device according to any one of claims 1 - 3, characterized in that, the color of the second conductive region is the same as the color of the electrochromic layer at a preset transmittance; and / or, the fourth conductive region is the same as the color of the electrochromic layer at the preset transmittance.

6. The electrochromic device according to any one of claims 1 - 3, characterized in that, the electrochromic device further includes a color layer; the color layer is located on the outer side of the second substrate layer; and / or, the color of the color layer is the same as the color of the second conductive region.

7. The electrochromic device according to any one of claims 1 - 3, characterized in that, the materials of the first conductive region and the third conductive region independently include any one or a combination of at least two of indium tin oxide, aluminum zinc oxide, fluorine - doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids or silver nanoparticles; and / or, the materials of the second conductive region and the fourth conductive region independently include any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire or conductive film. And / or, the materials of the first base layer and the second base layer independently include transparent glass and / or polymer materials; the polymer materials include flexible materials; the flexible materials include any one or a combination of at least two of polyethylene terephthalate, cycloolefin copolymer, or cellulose triacetate; And / or, the types of the electrochromic layer include PDLC, SPD, or EC; the EC includes a color-changing material layer, an electrolyte layer, and a counter electrode layer that are sequentially stacked.

8. The electrochromic device according to any one of claims 1-3, wherein, the maximum width of the second conductive region is greater than 5 mm; and / or, the maximum width of the fourth conductive region is greater than 5 mm.

9. The electrochromic device according to any one of claims 1-3, wherein, the second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region, or located on the surface of the first conductive region; and / or, the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located on the surface of the third conductive region.

10. The electrochromic device according to any one of claims 1-3, wherein, at least one lead-out electrode is connected to the second conductive region, and / or at least one lead-out electrode is connected to the fourth conductive region.

11. An electronic terminal, wherein, it includes the electrochromic device according to any one of claims 1-10.

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