Electrochromic device and vehicle having the same

Abstract

The application provides an electrochromic device and a vehicle. The electrochromic device comprises a main light-transmitting area and an electrochromic area. The electrochromic area comprises an electrochromic film. The electrochromic film comprises, in the thickness direction, a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer which are sequentially stacked. A hollow part is arranged in a single electrochromic film to form at least two color-changing sub-zones. In the thickness direction of the electrochromic film, the hollow part penetrates through the first conductive layer, the electrochromic layer and the second conductive layer. The electrochromic film is internally divided into multiple color-changing sub-zones by the hollow part. The hollow part only penetrates through the inner layer structure of the electrochromic film. The structure of the first substrate layer and the second substrate layer on the inner and outer sides of the electrochromic film is intact. The separation line inside the electrochromic film is not easily observed from the outside, and the influence of the separation line between the color-changing sub-zones on the structural integrity and appearance is reduced.

Description

Technical Field

[0001] This application relates to the field of electrochromic technology, and in particular to an electrochromic device and a vehicle having the electrochromic device. Background Technology

[0002] Currently, most car windshields are made of silica glass. When the sun is strong in front of the car, ordinary glass often fails to block the glare, affecting the driver's vision. To address this issue, an electrochromic film is installed in the interlayer of the windshield glass. By adjusting the light transmittance of the electrochromic film, the sun-shading effect of the windshield can be adjusted.

[0003] Furthermore, to achieve different sun-shading effects in different areas of the windshield, multiple sequentially arranged color-changing zones are typically set on the electrochromic film. Each zone can change color independently, thus achieving zoned adjustment of the windshield's light transmittance. However, in this structure, the color-changing zones need to be spaced out, resulting in noticeable dividing lines between them. These lines are easily observed by the user, affecting the driving / riding experience and even distracting the driver, posing a driving hazard. Utility Model Content

[0004] The purpose of this application is to provide an electrochromic device and vehicle that aims to solve the problem that there are obvious dividing lines between the color-changing areas of existing electrochromic devices, which are easily observed by users and affect their attention.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide an electrochromic device, including a main light-transmitting region and an electrochromic region; the electrochromic region includes a plurality of electrochromic films, each electrochromic film including a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second base layer stacked sequentially along the thickness direction, and each electrochromic film having a hollow portion to form at least two color-changing zones; along the thickness direction of the electrochromic film, the hollow portion penetrates the first conductive layer, the electrochromic layer and the second conductive layer.

[0007] The beneficial effects of the electrochromic device of this application are as follows: by setting a hollow part inside the electrochromic film, the electrochromic film can be divided into multiple color-changing zones; and the hollow part only penetrates the inner layer structure of the electrochromic film, and the two sides of the electrochromic film are still the complete first base layer and second base layer, that is, the structural integrity of the first base layer and the second base layer is intact, and the dividing line located inside the electrochromic film is not easily observed from the outside, effectively reducing the impact of the dividing line between the color-changing zones on the structural integrity and appearance of the electrochromic film.

[0008] In some embodiments, the electrochromic region includes two first electrochromic films disposed on the upper side of the main light-transmitting region and arranged symmetrically from left to right; the first electrochromic film has a plurality of first color-changing zones and a first hollow portion located between two adjacent first color-changing zones.

[0009] In some embodiments, the first electrochromic film has a plurality of first color-changing zones arranged sequentially from top to bottom, and the first hollow portion is located between two adjacent first electrochromic films.

[0010] In some embodiments, the width of the first electrochromic film gradually decreases from the side of the first electrochromic film closest to the main light-transmitting area to the side away from the main light-transmitting area.

[0011] In some embodiments, the electrochromic device further includes a mounting portion located at the upper center of the main light-transmitting area, and two first electrochromic films are respectively disposed on both sides of the mounting portion.

[0012] In one embodiment, the electrochromic region further includes a second electrochromic film disposed below the main light-transmitting region, the second electrochromic film having a plurality of second color-changing zones and a second hollow portion located between two adjacent second color-changing zones.

[0013] In some embodiments, the second electrochromic film has at least two second color-changing zones arranged laterally, and the second cutout portion is located between two adjacent second electrochromic films.

[0014] In some embodiments, the spacing between two adjacent color-changing zones ranges from 20 to 300 μm.

[0015] In some embodiments, the electrochromic device further includes electrode connectors for electrically connecting to the electrochromic film, wherein each electrode connector is electrically connected to each color-changing zone of the individual electrochromic film.

[0016] Secondly, embodiments of this application also provide a vehicle including a plurality of windows, at least one of the windows employing the electrochromic device described above.

[0017] By adopting the above technical solution, the electrochromic device of this application can be used as the windshield of a vehicle; the electrochromic device has multiple electrochromic films, at least one of which changes its color and transmittance to form a sunshade area at the top of the windshield, and at least one of which changes its color and transmittance to serve as a head-up display area at the bottom of the windshield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A front structural schematic diagram of an electrochromic device provided in an embodiment of this application;

[0020] Figure 2 This is a cross-sectional structural diagram of the electrochromic film of an electrochromic device provided in another embodiment of this application.

[0021] The labels for the attached figures are as follows:

[0022] 1. Main light-transmitting area; 2. Electrochromic area;

[0023] 20. Electrochromic film; 21. First electrochromic film; 22. Second electrochromic film;

[0024] 201, First substrate layer; 202, First conductive layer; 203, Electrochromic layer

[0025] 2031, Color-changing material layer; 2032, Electrolyte layer; 2033, Ion storage layer;

[0026] 204. Second conductive layer; 205. Second base layer;

[0027] 3. Hollowed-out section; 310. First hollowed-out section; 320. Second hollowed-out section;

[0028] 4. Color-changing zone; 410. First color-changing zone; 420. Second color-changing zone;

[0029] 5. Installation Department. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, in the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] To achieve different sun-shading effects in different areas of the windshield, multiple sequentially arranged color-changing zones are set on the electrochromic film. Each zone can change color independently, thus achieving zoned adjustment of the windshield's light transmittance. However, in this structure, the color-changing zones need to be spaced out, resulting in noticeable dividing lines between them. These lines are easily observed by the user, affecting the driving / riding experience and even distracting the driver, posing a driving hazard.

[0036] Based on this, the electrochromic film of this application is divided into multiple color-changing zones by setting a hollow part inside; and the hollow part only penetrates the inner layer structure of the electrochromic film, the structural integrity of the first base layer and the second base layer on the inner and outer sides of the electrochromic film is intact, and the dividing line located inside the electrochromic film is not easily observed from the outside, effectively reducing the impact of the dividing line between the color-changing zones on the structural integrity and appearance of the electrochromic film.

[0037] refer to Figure 1 and Figure 2 One embodiment of this application provides an electrochromic device 1000, including a main light-transmitting region 1 and an electrochromic region 2; the electrochromic region 2 includes a plurality of electrochromic films 20, each electrochromic film 20 including a first base layer 201, a first conductive layer 202, an electrochromic layer 203, a second conductive layer 204 and a second base layer 205 stacked sequentially along the thickness direction, and each electrochromic film 20 is provided with a hollow portion 3 to form at least two color-changing zones 4; along the thickness direction of the electrochromic film 20, the hollow portion 3 penetrates the first conductive layer 202, the electrochromic layer 203 and the second conductive layer 204.

[0038] Specifically, the first substrate layer 201 and the second substrate layer 205 are located on the inner and outer sides of the electrochromic film 20, respectively, and both are translucent. In the stacking direction of the first substrate layer 201, the electrochromic layer 203, and the second substrate layer 205, the overlapping area of ​​the first substrate layer 201 and the second substrate layer 205 covers the electrochromic layer 203, preventing it from being exposed outside the electrochromic film 20 and effectively protecting it. The electrochromic layer 203 is made of electrochromic material and can undergo stable and reversible color changes under the action of an applied electric field, thereby adjusting the transmittance of the electrochromic film 20 and enabling it to transmit light or block and prevent glare.

[0039] Understandably, refer to Figure 2The perforated portion 3 is formed inside the electrochromic film 20. The perforated portion 3 only penetrates the first conductive layer 202, the electrochromic layer 203, and the second conductive layer 204, meaning that the first substrate layer 201 and the second substrate layer 205 are both complete substrate layers. The electrochromic layer 203 is divided into multiple independent color-changing regions by the perforated portion 3, thereby forming at least multiple color-changing zones 4 with dimming function inside the electrochromic film 20. The first substrate layer 201 and the second substrate layer 205 located on the outside of the electrochromic film 20 remain complete structural layers. Therefore, this application is based on... The electrochromic film 20 has a hollowed-out portion 3 that divides it into multiple color-changing zones 4. The hollowed-out portion 3 forms a dividing line between two adjacent color-changing zones 4. The hollowed-out portion 3 only penetrates the inner layer structure of the electrochromic film 20. The inner and outer sides of the electrochromic film 20 are still the complete first base layer 201 and second base layer 205. That is, the structural integrity of the first base layer 201 and the second base layer 205 is intact. The dividing line located inside the electrochromic film 20 is not easily observed from the outside, which effectively reduces the impact of the dividing line between the color-changing zones 4 on the structural integrity and appearance of the electrochromic film 20.

[0040] Depending on the number of color-changing zones 4 required within a single electrochromic film 20, one or more cutout portions 3 can be provided within the electrochromic film 20; and by adjusting the position of each cutout portion 3, the size of each color-changing zone 4 can be adjusted accordingly.

[0041] For example, the cutout portion 3 can be formed by laser cutting. By laser cutting, the first conductive layer 202, the electrochromic layer 203 and the second conductive layer 204 are removed along the thickness direction of the electrochromic film 20, while the first base layer 201 and the second base layer 205 are retained. In this way, an electrochromic film 20 can be processed into a film with multiple color-changing zones 4.

[0042] The specific principle of laser cutting is as follows: the laser cutting effect is related to the absorption depth of the material to the wavelength. Different materials have different absorption rates for specific wavelengths of laser. By selecting a suitable wavelength of laser and adjusting the corresponding process parameters, the emitted laser does not reach the damage threshold of the outer first substrate layer 201 and the second substrate layer 205, but it can damage the inner first conductive layer 202, electrochromic layer 203 and the second conductive layer 204. Thus, the integrity of the outer first substrate layer 201 and the second substrate layer 205 can be preserved through laser cutting. The dividing line formed by the hollow part 3 is located inside the electrochromic film 20, making the dividing line inconspicuous from the outside and reducing the influence of the dividing line on the structure and appearance of the electrochromic film 20.

[0043] refer to Figure 2In one specific embodiment of this application, the first substrate layer 201 and the second substrate layer 205 are made of polyethylene terephthalate (PET), and both the first substrate layer 201 and the second substrate layer 205 are flexible. The first conductive layer 202 and the second conductive layer 204 are indium tin oxide (ITO). The electrochromic layer 203 includes a color-changing material layer 2031 (IonConductor, IC), an electrolyte layer 2032, and an ion storage layer 2033 (Electrochromic Layer, EC) stacked sequentially. The materials of the color-changing material layer 2031, the electrolyte layer 2032, and the ion storage layer 2033 can be materials from the prior art, which will not be elaborated further in this application. Furthermore, when the electrochromic film 20 is laser-cut, the emitted laser energy does not reach the damage threshold of the outer PET material, but it can damage the materials of the inner ITO, the color-changing material layer 2031, the electrolyte layer 2032 and the ion storage layer 2033.

[0044] refer to Figure 1 In some embodiments, the electrochromic region 2 includes two first electrochromic films 21 disposed on the upper side of the main light-transmitting region 1 and arranged symmetrically on the left and right; the first electrochromic film 21 has a plurality of first color-changing partitions 410 and a first hollow portion 310 located between two adjacent first color-changing partitions 410.

[0045] In this embodiment, the electrochromic device of this application is specifically applied to the windshield of a car. The main light-transmitting area 1 is the main field of vision for the user to observe the front. There are two first electrochromic films 21, which are symmetrically arranged on the upper side of the main light-transmitting area 1. They can respectively form the sunshade areas of the driver and passenger seats of the windshield. By adjusting the light transmittance of the two first electrochromic films 21, the sunshade effect of the car windshield can be adjusted to prevent the sunlight from being dazzling and affecting driving.

[0046] Understandably, the first electrochromic film 21 includes multiple first color-changing zones 410. The vehicle's power supply is electrically connected to the first electrochromic film 21. By adjusting the electrical signals of each first color-changing zone 410, the optical transmittance of each first color-changing zone 410 can be distributed and adjusted to achieve a better sunshade control effect.

[0047] refer to Figure 1 In some embodiments, the first electrochromic film 21 has a plurality of first color-changing zones 410 arranged sequentially from top to bottom, and the first hollow portion 310 is located between two adjacent first electrochromic films 21.

[0048] Specifically, the extension path of the first hollow portion 310 in the first electrochromic film 21 is located between the left and right sides of the electrochromic film 21. Subsequently, the first hollow portion 310 can divide the first electrochromic film 21 in the horizontal direction, so that multiple first color-changing sections 410 arranged from top to bottom are formed in the first electrochromic film 21.

[0049] Understandably, the number of the first perforated portions 310 can be set according to requirements to divide the first electrochromic film 21 into any number of first color-changing sections 410. The number of first color-changing sections 410 in the first electrochromic film 21 can be 2, 3, or more. Preferably, referring to... Figure 1 The first electrochromic film 21 has two first hollow portions 310, that is, three first color-changing sections 410 arranged from top to bottom are formed in the first electrochromic film 21.

[0050] In one embodiment, three first color-changing zones 410 are formed in the first electrochromic film 21 arranged from top to bottom, and the height of each first color-changing zone 410 decreases sequentially from top to bottom. It can be understood that the first electrochromic film 21 is the top of the windshield of an automobile. The first color-changing zone 410 that is closer to the top of the first electrochromic film 21 has higher requirements for sun shading, and needs to have a larger area and lower light transmittance to effectively block sunlight from shining directly into the user's eyes. Therefore, the height of the first color-changing zone 410 that is closer to the top of the windshield is larger so as to form a larger light-shading area.

[0051] In some embodiments, the electrochromic device further includes a mounting portion 5 located in the upper middle part of the main light-transmitting area 2, and two first electrochromic films 21 are respectively disposed on both sides of the mounting portion 5.

[0052] For example, the middle position at the top of the car's windshield corresponds to the mounting position of the rearview mirror and the dashcam. Therefore, when the electrochromic device of this application is applied to the car's windshield, a mounting portion 5 is reserved between the two first electrochromic films 21 at the top. The mounting portion 5 is used to install the rearview mirror base and align with the mounting position of the dashcam. Alternatively, the car may also install radar or integrated sensor modules (such as lane keeping assist, automatic wipers, automatic headlights, etc.) at the middle position at the top of the windshield, and the mounting portion 5 is used to reserve installation space.

[0053] refer to Figure 1 In some embodiments, the width of the first electrochromic film 21 gradually decreases from the side of the first electrochromic film 21 closest to the main light-transmitting region 1 to the side away from the main light-transmitting region 1.

[0054] From bottom to top, the width of the first electrochromic film 21 gradually decreases, and correspondingly, the width of the mounting part 5 gradually increases, thus the mounting part 5 has a trapezoidal structure that is wider at the top and narrower at the bottom. Understandably, the base of the rearview mirror is usually wider (larger contact surface with the windshield), while the sensor module (such as light / rain sensor, autonomous driving camera) requires vertical space. The trapezoidal design of the mounting part 5 can simultaneously meet the requirements of horizontal width (matching the rearview mirror base) and vertical height (accommodating the sensor module). The trapezoidal design of the mounting part 5, which is wider at the top and narrower at the bottom, can accurately cover the necessary area and avoid excessive obstruction of vision.

[0055] refer to Figure 1 In some embodiments, the electrochromic region 2 further includes a second electrochromic film 22 disposed below the main light-transmitting region 1. The second electrochromic film 22 has a plurality of second color-changing zones 420 and a second cutout portion 320 located between two adjacent second color-changing zones 420.

[0056] Specifically, the second electrochromic film 22 is located below the main light-transmitting area 1. The second electrochromic film 22 is used for a head-up display (HUD), also known as a head-up display system, which refers to a driver-centric, blind-operated, multi-functional instrument panel. The function of the HUD is to project important driving information such as vehicle speed, RPM, and navigation onto the lower side of the driver's windshield, allowing the driver to see it at eye level. This enables the driver to see important driving information such as speed and navigation without looking down or turning their head, thus allowing them to focus more on road conditions.

[0057] Specifically, the vehicle's power supply is electrically connected to the second electrochromic film 22. By separately adjusting the electrical signals of each second electrochromic zone 420, the optical transmittance of each second electrochromic zone 420 can be distributed and adjusted to achieve a better head-up display effect. For example, when the vehicle is moving, adjusting the visible light transmittance of any second electrochromic zone 420 to less than or equal to 10% puts the second electrochromic zone 420 in a dark state. The second electrochromic zone 420 can serve as the display background for the head-up display, and the dark state provides a higher contrast for the displayed image, ensuring the clarity of the image. When the head-up display function of the second electrochromic zone 420 is turned off, such as when the vehicle is parked, adjusting the visible light transmittance of the second electrochromic zone 420 to greater than or equal to 50% puts the second electrochromic zone 420 in a transparent state. The windshield can then provide the driver and passengers with a complete view without affecting the vehicle's aesthetic appearance. By adjusting the light transmittance of any of the second color-changing zones 420 in the second electrochromic film 22 to serve as the display background for the head-up display, the head-up display can avoid limiting the driver's field of vision, provide the driver with a wider field of vision, not affect the driver's judgment of the distance in front of the vehicle, ensure the reliability of the vehicle, and also improve the appearance of the vehicle.

[0058] refer to Figure 1 In some embodiments, the second electrochromic film 22 has at least two second color-changing sections 420 arranged laterally, and the second cutout portion 320 is located between two adjacent second electrochromic films 22.

[0059] Specifically, the extension path of the second hollow portion 320 within the second electrochromic film 22 is located between the upper and lower sides of the electrochromic film 22. Consequently, the second hollow portion 320 can divide the second electrochromic film 22 along the longitudinal direction, thereby forming a plurality of horizontally arranged second color-changing sections 420 within the second electrochromic film 22.

[0060] Understandably, the number of the second perforated portions 320 can be set according to requirements to divide the second electrochromic film 22 into any number of second color-changing sections 420. The number of second color-changing sections 420 in the second electrochromic film 22 can be two, three, or more. Preferably, referring to... Figure 1 The second electrochromic film 22 has two second hollow portions 320, that is, three horizontally arranged second color-changing sections 420 are formed in the second electrochromic film 22.

[0061] In one embodiment, the second electrochromic film 22 includes three second color-changing zones 420, with one second color-changing zone 420 located in the center of the second electrochromic film 22, and the other two second color-changing zones 420 respectively located on both sides of the central second color-changing zone 420, arranged symmetrically from left to right. Understandably, when the electrochromic device is applied to a car windshield, the second color-changing zone 420 on the left forms the driver's head-up display area, mainly used to display core driving data, such as vehicle speed, engine speed (for gasoline vehicles), remaining range, navigation route, etc.; the second color-changing zone 420 on the right forms the passenger's head-up display area, mainly used to display entertainment media information, such as currently playing songs, incoming call notifications, weather, etc.; the second color-changing zone 420 in the middle forms the central head-up display area, used to display dynamic or interactive information such as multi-tasking reminders, multimedia control (feedback during voice interaction), etc. By reasonably adjusting the electrical signals of each second color-changing zone 420, the optical transmittance of each second color-changing zone 420 can be distributed and adjusted to achieve a better head-up display effect.

[0062] In some embodiments, the spacing between two adjacent first color-changing zones 410 in the longitudinal direction ranges from 20 to 300 μm. Specifically, the spacing between two first color-changing zones 410 can be any value among 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 260 μm, 280 μm, and 300 μm. Understandably, a smaller spacing between two adjacent first color-changing zones 410 refines the dividing line formed by the two first color-changing zones 410 inside the electrochromic film 20, making it less easily observed from the outside of the first electrochromic film 21, thus reducing the impact of the dividing line between the first color-changing zones 410 on the overall structural integrity and appearance.

[0063] In some embodiments, the spacing between two adjacent second color-changing zones 420 in the longitudinal direction ranges from 20 to 300 μm. Specifically, the spacing between two second color-changing zones 420 can be any value among 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 260 μm, 280 μm, and 300 μm. Understandably, a smaller spacing between two adjacent second color-changing zones 420 refines the dividing line formed by the two second color-changing zones 420 inside the electrochromic film 20, making it less easily observed from the outside of the second electrochromic film 22, thus reducing the impact of the dividing line between the second color-changing zones 420 on the structural integrity and appearance.

[0064] In some embodiments, the electrochromic device further includes electrode connectors (not shown) for electrical connection to the electrochromic film 20, each electrode connector being electrically connected to each color-changing zone 4 of the individual electrochromic film 20.

[0065] Specifically, a single electrochromic film 20 only needs to be equipped with two electrode connectors. One electrode connector is used to connect to the positive terminal of the external power supply, and the other electrode connector is used to connect to the negative terminal of the external power supply. This saves wiring space and makes the electrode lead-out method of each color-changing zone 4 simpler.

[0066] Furthermore, each individual electrode connector is electrically connected to each color-changing zone 4 of the electrochromic film 20. By connecting the electrochromic film 20 to an external power supply circuit and / or control circuit, the distribution adjustment and control of each color-changing zone 4 in the electrochromic film 20 can be realized.

[0067] A second aspect of this application also provides a vehicle, including multiple windows and an on-board power supply, wherein at least one window employs the electrochromic device 1000 described above.

[0068] Understandably, the vehicle has an on-board power supply, and the electrochromic film 20 in the electrochromic device 1000 is electrically connected to the on-board power supply. The electrochromic film 20 is used to receive power from the on-board power supply to change the transmittance of each color-changing zone 4.

[0069] The vehicles include two-wheeled, three-wheeled, or four-wheeled vehicles. The vehicles can be one of the following: gasoline vehicles, pure electric vehicles, hybrid vehicles, range-extended electric vehicles, plug-in hybrid vehicles, or new energy vehicles.

[0070] In some embodiments, the electrochromic device 1000 of this application can be specifically used as the windshield of a vehicle; the electrochromic device 1000 has a plurality of electrochromic films 20, at least one electrochromic film 20 having its color and transmittance changed to form a sunshade area at the top of the windshield, and at least one electrochromic film 20 having its color and transmittance changed for use in a head-up display area at the bottom of the windshield.

[0071] In some embodiments, the electrochromic device 1000 further includes two base layers constituting the vehicle window: an inner layer (facing the interior of the vehicle) and an outer layer (facing the exterior of the vehicle), with the electrochromic film 20 disposed between the two base layers.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electrochromic device, characterized in that, It includes: a main light-transmitting area and an electrochromic area; the electrochromic area includes a plurality of electrochromic films, each electrochromic film including a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second base layer stacked sequentially along the thickness direction, and each electrochromic film having a hollow portion to form at least two color-changing zones; along the thickness direction of the electrochromic film, the hollow portion penetrates the first conductive layer, the electrochromic layer and the second conductive layer.

2. The electrochromic device according to claim 1, characterized in that, The electrochromic region includes two first electrochromic films disposed on the upper side of the main light-transmitting region and arranged symmetrically on the left and right; the first electrochromic film has a plurality of first color-changing zones and a first hollow portion located between two adjacent first color-changing zones.

3. The electrochromic device according to claim 2, characterized in that, The first electrochromic film has a plurality of first color-changing zones arranged sequentially from top to bottom, and the first hollow portion is located between two adjacent first electrochromic films.

4. The electrochromic device according to claim 2, characterized in that, The width of the first electrochromic film gradually decreases from the side of the first electrochromic film closest to the main light-transmitting area to the side away from the main light-transmitting area.

5. The electrochromic device according to claim 2 or 4, characterized in that, The electrochromic device further includes a mounting portion located in the upper middle part of the main light-transmitting area, and two first electrochromic films are respectively disposed on both sides of the mounting portion.

6. The electrochromic device according to claim 1 or 2, characterized in that, The electrochromic region also includes a second electrochromic film disposed below the main light-transmitting region. The second electrochromic film has a plurality of second color-changing zones and a second hollow portion located between two adjacent second color-changing zones.

7. The electrochromic device according to claim 6, characterized in that, The second electrochromic film has at least two second color-changing zones arranged laterally, and the second cutout portion is located between two adjacent second electrochromic films.

8. The electrochromic device according to claim 1, characterized in that, The spacing between two adjacent color-changing zones ranges from 20 to 300 μm.

9. The electrochromic device according to claim 1, characterized in that, The electrochromic device further includes electrode connectors for electrically connecting to the electrochromic film, wherein each electrode connector is electrically connected to each color-changing zone of the individual electrochromic film.

10. A vehicle, characterized in that, It includes multiple windows, at least one of which employs an electrochromic device as described in any one of claims 1-9.

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