Dimmable ambilight sunroof and control method for a dimmable ambilight sunroof

Abstract

The embodiment of the present application discloses a dimming atmosphere lamp sunroof and a control method thereof, which comprises: a first light-transmitting plate, a bonding layer and a second light-transmitting plate arranged in sequence from top to bottom; the first light-transmitting plate and the second light-transmitting plate are connected through the bonding layer; an electrochromic film and an LED lamp film are arranged between the first light-transmitting plate and the second light-transmitting plate; the electrochromic film is used for adjusting the visible light transmittance of the dimming atmosphere lamp sunroof, and the electrochromic film is electrically connected with the LED lamp film and can be used for supplying power for the LED lamp film. The present application helps to improve the energy saving of the dimming atmosphere lamp sunroof.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photoelectricity, in particular to a light-adjustable ambient light sunroof and a control method of the light-adjustable ambient light sunroof. BACKGROUND

[0002] At present, the light-adjustable ambient light sunroof of the car usually adopts the structure of light-adjustable film + LED light film, and the light-adjustable film and the LED light film are placed in a stack. In this structure, the light-adjustable film and the LED light film need to be powered separately, and the energy saving is not good. The prior art lacks a light-adjustable ambient light sunroof with better energy saving. SUMMARY

[0003] In order to solve the problem of energy saving of the light-adjustable ambient light sunroof technology at present, the present application provides a light-adjustable ambient light sunroof and a control method of the light-adjustable ambient light sunroof.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a light-adjustable ambient light sunroof is provided, which comprises: a first light-transmitting plate, an adhesive layer and a second light-transmitting plate arranged in sequence from top to bottom; the first light-transmitting plate and the second light-transmitting plate are connected through the adhesive layer; an electrochromic film and an LED light film are arranged between the first light-transmitting plate and the second light-transmitting plate; the electrochromic film is used to adjust the visible light transmittance of the light-adjustable ambient light sunroof, and the electrochromic film is electrically connected with the LED light film and can be used to power the LED light film.

[0005] Optionally, the adhesive layer comprises: a first adhesive layer, a second adhesive layer and a third adhesive layer.

[0006] The first adhesive layer is connected with the first light-transmitting plate, the third adhesive layer is connected with the second light-transmitting plate, and the second adhesive layer is located between the first adhesive layer and the third adhesive layer.

[0007] The electrochromic film is arranged between the first adhesive layer and the second adhesive layer, and the LED light film is arranged between the second adhesive layer and the third adhesive layer.

[0008] Optionally, the light-adjustable range of the electrochromic film for the visible light transmittance is 0.5% to 50%.

[0009] Optionally, the output voltage of the electrochromic film is 1.5V to 2.5V, and the energy density of the electrochromic film is 150mWh / m 2 200mWh / m 2 .

[0010] Optionally, the light-adjustable ambient light sunroof further comprises: a control system.

[0011] The electrochromic film and the LED film are electrically connected by the control system, and the control system is used for controlling the electrochromic film to be powered on or powered off and for controlling the electrochromic film to supply power for the LED film.

[0012] Optionally, the control system comprises a first control module, and the first control module is connected with the external power supply and the electrochromic film respectively, and the first control module is used for controlling the electrochromic film to be powered on or powered off.

[0013] Optionally, the control system further comprises a second control module, and the second control module is connected with the electrochromic film and the LED film respectively, and the second control module is used for controlling the electrochromic film to supply power for the LED film.

[0014] Optionally, the first control module is specifically used for sending a notification signal to the second control module when controlling the electrochromic film to be powered off, and the second control module is specifically used for controlling the electrochromic film to supply power for the LED film when receiving the notification signal.

[0015] Optionally, the external power supply is a vehicle-mounted battery, the first control module is connected with the vehicle-mounted battery through a DC-DC converter, and the DC-DC converter is used for converting the voltage output by the vehicle-mounted battery into a voltage suitable for the electrochromic film.

[0016] Optionally, the electrochromic film comprises a first electric substrate, an ion storage layer, an electrolyte layer, an electrochromic layer and a second electric substrate which are sequentially stacked from top to bottom.

[0017] Optionally, the ion storage layer adopts nickel oxide, and the electrochromic layer adopts tungsten oxide or vanadium oxide; or the ion storage layer adopts tungsten oxide or vanadium oxide, and the electrochromic layer adopts Prussian blue.

[0018] Optionally, the electrolyte layer adopts at least one of H2SO4 / PVA gel, KOH / PVA gel and LiClO4 / PMMA gel.

[0019] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a control method of a dimmable ambient light sunroof is also provided, which is applied to the dimmable ambient light sunroof, and the control method comprises:

[0020] The LED film is powered by the electrochromic film.

[0021] Optionally, the LED film is powered by the electrochromic film, specifically including:

[0022] The electrochromic film supplies power to the LED lamp film after power-off.

[0023] Optionally, the control method of the dimmable ambient light sunroof further comprises:

[0024] The electrochromic film is colored when powered on, and the dimming range of the visible light transmittance of the electrochromic film after coloring changes with the voltage change after the electrochromic film is powered on.

[0025] The beneficial effects of the present application are:

[0026] The present application uses an electrochromic film as a dimming film, and utilizes the characteristic that the electrochromic film can be used as an energy storage element. When the electrochromic film is powered on, the electrochromic film is colored to achieve adjustable light, and at the same time, energy is stored. When needed, the electrochromic film can deliver the stored electrical energy to the LED lamp film to supply power to the LED lamp film, achieving the effect of energy saving, which helps to improve the energy saving of the dimmable ambient light sunroof. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor. In the drawings:

[0028] Figure 1 is a schematic diagram of the dimmable ambient light sunroof of the embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the sunroof structure of the embodiment of the present application;

[0030] Figure 3 is a structural schematic diagram of the electrochromic film of the embodiment of the present application;

[0031] Figure 4 is a schematic diagram of the control system of the embodiment of the present application.

[0032] Label explanation: 1, first light transmission plate; 2, second light transmission plate; 3, first adhesive layer; 4, second adhesive layer; 5, third adhesive layer; 6, electrochromic film; 7, LED lamp film; 8, control system; 61, first electric substrate; 62, second electric substrate; 63, ion storage layer; 64, electrochromic layer; 65, electrolyte layer; 71, transparent flexible circuit board; 72, LED lamp bead; 100, sunroof structure. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the dimming atmosphere light skylight of the present invention can be used in the automotive field, and can also be used in any field other than the automotive field. The application field of the dimming atmosphere light skylight of the present invention is not limited. The dimming atmosphere light skylight of the present invention can be used in the automotive skylight, and can also be used in the skylight of ships, buildings, etc.

[0036] Figure 1 Schematic diagram of a dimming atmosphere light skylight according to an embodiment of the present invention. Figure 1 As shown, in one embodiment of the present invention, the dimming atmosphere light skylight of the present invention is composed of two parts: a skylight structure 100 and a control system 8.

[0037] Figure 2 for Figure 1 A portion of the cross-sectional view taken along line AA' shows the specific structure of the skylight structure 100, as shown in FIG. Figure 2 As shown, in one embodiment of the present invention, the skylight structure 100 of the present invention specifically includes: a first light-transmitting plate 1, a first adhesive layer 3, an LED lamp film 7, a second adhesive layer 4, an electrochromic film 6, a third adhesive layer 5 and a second light-transmitting plate 2.

[0038] In one embodiment of the present invention, a first light-transmitting plate 1, a first adhesive layer 3, a second adhesive layer 4, a third adhesive layer 5, and a second light-transmitting plate 2 are stacked in order from top to bottom. An LED lamp film 7 is disposed between the first adhesive layer 3 and the second adhesive layer 4, and an electrochromic film 6 is disposed between the second adhesive layer 4 and the third adhesive layer 5.

[0039] In another embodiment of the present invention, the first light-transmitting plate 1, the first adhesive layer 3, the LED lamp film 7, the second adhesive layer 4, the electrochromic film 6, the third adhesive layer 5 and the second light-transmitting plate 2 are stacked in sequence from top to bottom.

[0040] In the present application, the electrochromic film 6 is a storage type electrochromic film, which is used to color when powered on, and is used to power the LED lamp film 7. The present application takes advantage of the characteristics of the electrochromic film 6 as a dimming film and a storage element. When the electrochromic film 6 is powered on, the electrochromic film 6 colors to achieve adjustable light, and at the same time stores energy. When needed, the electrochromic film 6 can deliver the stored electrical energy to the LED lamp film 7 to power the LED lamp film 7, and the LED lamp beads in the LED lamp film 7 can be lit, achieving the effect of energy saving, which helps to improve the energy saving of the dimming atmosphere lamp skylight.

[0041] In an embodiment of the present application, the electrochromic film 6 and the LED lamp film 7 can be arranged in parallel, and the projection of the electrochromic film 6 in the vertical direction does not cover the LED lamp film 7 at all. In some embodiments of the present application, the projection of the electrochromic film 6 in the vertical direction at least partially covers the LED lamp film 7, so that the color changing range of the electrochromic film 6 and the light emitting range of the LED lamp film 7 partially overlap, so that when they are powered on, they can achieve a better light atmosphere effect. In some embodiments of the present application, the projection of the electrochromic film 6 in the vertical direction completely covers the LED lamp film 7. Figure 2 In the embodiment shown in the figure, the projection of the electrochromic film 6 in the vertical direction completely covers the LED lamp film 7.

[0042] As can be seen, the present application provides an electrochromic dimming 6+LED lamp film 7 skylight. The electrochromic film 6 and the LED lamp film 7 are arranged in the middle of the skylight, and the LED lamp film 7 is placed in a stack with the electrochromic film 6. The electrochromic film 6 and the LED lamp film 7 are connected through the control system 8. During the day (or when needed), the electrochromic film 6 is powered on, the electrochromic film 6 colors, and can be used as a sunshade. At night (or when needed), the electrochromic film 6 is discharged, and the LED lamp film 7 is powered on, which acts as an atmosphere lamp.

[0043] In a specific embodiment of the present application, the electrochromic film 6 is specifically used to color and dim when powered on, and at the same time, the electrochromic film 6 can also be used to power the LED lamp film 7. In another specific embodiment of the present application, the electrochromic film 6 is specifically used to power the LED lamp film 7 when powered off, and the electrochromic film 6 will fade and act as a storage element when powered off, so that the electrical energy stored in the electrochromic film 6 is delivered to the LED lamp film 7 to achieve power supply. In another specific embodiment of the present application, the electrochromic film 6 colors after being powered on and is only used to adjust the visible light transmittance of the dimming atmosphere lamp skylight, at which time the electrochromic film 6 does not power the LED lamp film 7. In an embodiment of the present application, the input voltage range of the electrochromic film 6 after dimming is powered on is 1.5V to 3.5V.

[0044] In an embodiment of the present application, the first light-transmitting plate 1 and the second light-transmitting plate 2 are both glass plates, and the first light-transmitting plate 1 and the second light-transmitting plate 2 can be tempered glass or ordinary inorganic glass, i.e., the light-adjustable atmosphere lamp skylight of the present application is a glass window. In other embodiments of the present application, the first light-transmitting plate 1 and the second light-transmitting plate 2 can also be transparent organic glass. In other embodiments of the present application, the first light-transmitting plate 1 and the second light-transmitting plate 2 can also be a combination of laminated glass to improve the overall safety of the glass, and the first light-transmitting plate 1 and the second light-transmitting plate 2 can be curved glass, which can be used in curved glass applications to obtain a curved functional laminated glass suitable for automobiles. At this time, other stacked layers such as the first adhesive layer, the second adhesive layer, the third adhesive layer, the electrochromic film, the LED lamp film, etc. are also curved to have the same curvature.

[0045] In an embodiment of the present application, the first adhesive layer 3 and the second adhesive layer 4 can each use at least one of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), and an ion-type polymer film (SGP), or any combination thereof.

[0046] In an embodiment of the present application, the LED lamp film 7 includes a transparent flexible circuit board 71 and LED lamp beads 72, and the transparent flexible circuit board 71 has etched metal lines to connect the LED lamp beads 72 in series or in parallel to form an array. The base material of the transparent flexible circuit board 71 can be polyethylene terephthalate (PET) or polyimide (PI), and the thickness is 0.10 mm to 0.20 mm. The thickness of the LED lamp beads 72 is 0.2 mm to 0.4 mm, and the driving voltage of the LED lamp beads 72 is 0.5 V to 1.2 V.

[0047] In one embodiment, the LED lamp film 7 and the electrochromic film 6 are stacked and connected by an adhesive layer in between. The driving voltage of the LED lamp beads 72 in series is 1 V, the discharge voltage of the electrochromic film 6 is 2 V to 2.5 V, and the LED lamp bead array is 2x5, i.e., 2 lamp beads in series and 5 groups in parallel.

[0048] In another embodiment, the LED lamp film 7 and the electrochromic film 6 are stacked and connected by an adhesive layer in between. The driving voltage of the LED lamp beads 72 in series is 0.5 V, the discharge voltage of the electrochromic film 6 is 2 V to 2.5 V, and the LED lamp bead array is 4x4, i.e., 4 lamp beads in series and 4 groups in parallel.

[0049] Figure 3 For Figure 1 Part of the cross-sectional view of A-A' shows the specific structure of the electrochromic film 6, as shown in Figure 3The electrochromic film 6 includes, from top to bottom, a first electric substrate 61, an ion storage layer 63, an electrolyte layer 65, an electrochromic layer 64, and a second electric substrate 62. In one embodiment of the present application, the LED lamp film 7 can be connected to the control system 8 through a wire, and the control system 8 can be connected to the first electric substrate 61 and the second electric substrate 62 of the electrochromic film 6 through a conductor such as silver foil, copper foil, etc. In other embodiments of the present application, the electrodes formed by the first electric substrate 61 and the second electric substrate 62 can be led to the outside of the sunroof structure 100 through lead-out wires (not shown in the figure) to be connected to the control system 8.

[0050] In one embodiment of the present application, when the electrochromic film 6 is powered by an external power supply, the ion storage layer 63, the electrolyte layer 65, and the electrochromic layer 64 inside the electrochromic film 6 work together to undergo an electrochemical redox reaction, causing the color of the electrochromic layer 64 to change by gaining or losing electrons. The electrolyte layer 65 functions to transport ions and block electrons, and the ion storage layer 63 mainly functions to store and provide ions required by the electrochromic layer 64. In other embodiments of the present application, when the electrochromic film 6 powers the LED lamp film 7, the direction of ion movement and the direction of electron movement inside the electrochromic film 6 are opposite to those when the electrochromic film 6 is powered by an external power supply.

[0051] In one embodiment of the present application, the first electric substrate 61 and the second electric substrate 62 can be transparent films coated with at least one of indium tin oxide, fluorine-doped tin oxide, and silver, or any combination thereof, and the transparent films can be made of polyethylene terephthalate (PET) or polyimide (PI).

[0052] In one embodiment of the present application, the ion storage layer 63 is made of nickel oxide, and the electrochromic layer 64 is made of tungsten oxide or vanadium oxide.

[0053] In another embodiment of the present application, the ion storage layer 63 is made of tungsten oxide or vanadium oxide, and the electrochromic layer 64 is made of Prussian blue.

[0054] In one embodiment of the present application, the electrolyte layer 65 is made of at least one of H2SO4 / PVA gel, KOH / PVA gel, and LiClO4 / PMMA gel.

[0055] In one embodiment of the present application, the output voltage of the electrochromic film 6 is 1.5V to 2.5V.

[0056] In one embodiment of the present application, the energy density of the electrochromic film 6 is 150mWh / m 2 to 200mWh / m 2.

[0057] In one embodiment of the present application, the light modulation range of the electrochromic film 6 is 0.5% to 50%. The light modulation range refers to the change of the visible light transmittance from the darkest (dark state) to the brightest (transparent state), and the light modulation range of 0.5% to 50% means that after the electrochromic film 6 is colored, the color of the electrochromic film 6 changes from the transparent state to the dark state, and the transmittance of the electrochromic film 6 for visible light can be reduced from the highest 50% to 0.5%.

[0058] As shown in Figure 1 , the light modulation atmosphere lamp skylight of the present application further comprises a control system 8 connected with the skylight structure 100.

[0059] Figure 4 is a schematic diagram of the control system of an embodiment of the present application, as shown in Figure 4 , in one embodiment of the present application, the control system 8 comprises a first control module, the first control module is connected with an external power supply and the electrochromic film 6 respectively, and the first control module is used for controlling the on-off of the electrochromic film 6. Specifically, the first control module is used for controlling the external power supply to supply power to the electrochromic film 6, and controlling the external power supply to stop supplying power to the electrochromic film 6.

[0060] As shown in Figure 4 , in one embodiment of the present application, the control system 8 further comprises a second control module, the second control module is connected with the electrochromic film 6 and the LED lamp film 7 respectively, and the second control module is used for controlling the power supply state of the electrochromic film 6 to the LED lamp film 7. Specifically, the second control module is used for controlling the electrochromic film 6 to supply power to the LED lamp film 7, and controlling the electrochromic film 6 to stop supplying power to the LED lamp film 7.

[0061] In one embodiment of the present application, the first control module is specifically used for sending a notification signal to the second control module when controlling the electrochromic film 6 to be powered off. The second control module is specifically used for controlling the electrochromic film 6 to supply power to the LED lamp film 7 when receiving the notification signal.

[0062] In one embodiment of the present application, the first control module and the second control module can adopt existing switch modules.

[0063] In one embodiment of the present application, the first control module contains a current sensor for detecting the input current of the electrochromic film 6. When the input current is zero, it indicates that the electrochromic film 6 is in the power-off state, and the first control module controls the second control module to open the circuit for the electrochromic film 6 to supply power to the LED lamp film 7.

[0064] As shown in Figure 4As shown, in one embodiment of the present application, the external power supply is specifically a vehicle-mounted battery, the first control module is connected with the vehicle-mounted battery through a DC-DC converter, and the DC-DC converter is used to convert the voltage output by the vehicle-mounted battery into a voltage suitable for the electrochromic film 6. Specifically, the vehicle-mounted battery outputs a voltage of 12V or 14V, and the DC-DC converter converts the voltage output by the vehicle-mounted battery into a voltage of 1.5V to 2.5V suitable for the electrochromic film.

[0065] Another aspect of the present application also provides a control method of a dimmable ambient light sunroof, which is applied to the dimmable ambient light sunroof of the above-mentioned embodiments, and specifically includes:

[0066] The LED lamp film 7 is powered by the electrochromic film 6.

[0067] In one embodiment of the present application, the powering of the LED lamp film 7 by the electrochromic film 6 specifically includes:

[0068] The electrochromic film 6 powers the LED lamp film 7 after being powered off.

[0069] In one embodiment of the present application, the control method of the dimmable ambient light sunroof further includes:

[0070] The electrochromic film 6 is colored when powered on, and the dimming range of the visible light transmittance of the electrochromic film 6 after being colored changes with the change of the voltage of the electrochromic film 6 after being powered on.

[0071] As can be seen from the above embodiments, the present application uses an electrochromic film as a dimming film and an LED lamp film as an ambient light. The electrochromic film and the LED lamp film are combined in the sunroof, and the LED lamp film and the electrochromic film are placed in a stack. The electrochromic dimming film serves as a dimming film and an energy storage element. The electrochromic film is powered on during the day (or when needed), the electrochromic film is colored, and can serve as a sunshade. The electrochromic film is discharged at night (or when needed), and the LED lamp is powered, serving as an ambient light. This structure uses the energy storage property of the electrochromic film to power the LED, achieving the effect of energy saving.

[0072] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dimmable ambient light sunroof, characterized in that The utility model relates to a kind of light control system of light control system, including: First light-transmitting plate, adhesive layer, second light-transmitting plate and control system are sequentially arranged from top to bottom; The first light-transmitting plate and the second light-transmitting plate are connected by the adhesive layer; The first light-transmitting plate and the second light-transmitting plate are provided with electrochromic film and LED lamp film between them; The electrochromic film is energy storage type electrochromic film, for adjusting the visible light transmittance of the light control atmosphere lamp skylight, the electrochromic film is electrically connected with the LED lamp film and can be used to power the LED lamp film when power off, the electrochromic film does not power the LED lamp film when power on; The control system includes: first control module and second control module; The first control module is connected with external power supply and the electrochromic film respectively, and the first control module is used to control the electrochromic film power on or power off;The second control module is connected with the electrochromic film and the LED lamp film respectively, and the second control module is used to control the electrochromic film power supply for the LED lamp film;The first control module contains current sensor, for detecting the input current of the electrochromic film, when the input current is zero, the first control module controls the second control module to open the circuit that the electrochromic film powers the LED lamp film.

2. The dim-to-warm ambient light sky light of claim 1, wherein, The adhesive layer includes: first adhesive layer, second adhesive layer and third adhesive layer; The first adhesive layer is connected with the first light-transmitting plate, the third adhesive layer is connected with the second light-transmitting plate, and the second adhesive layer is located between the first adhesive layer and the third adhesive layer; The electrochromic film is arranged between the first adhesive layer and the second adhesive layer, and the LED lamp film is arranged between the second adhesive layer and the third adhesive layer.

3. The dim-to-warm ambient light sky light of claim 1, wherein, The electrochromic film has a light control range of 0.5% to 50% for visible light transmittance.

4. The dim-to-warm ambient light sky light of claim 1, wherein, The output voltage of the electrochromic film is 1.5V to 2.5V, and the energy density of the electrochromic film is 150mWh / m 2 to 200mWh / m 2 .

5. The dim-to-warm ambient light sky light of claim 1, wherein, The first control module is particularly used to send a notification signal to the second control module when controlling the electrochromic film to power off; The second control module is particularly used to control the electrochromic film to power the LED lamp film when receiving the notification signal.

6. The dim-to-warm ambient light sky light of claim 1, wherein, The external power supply is a vehicle-mounted battery, and the first control module is connected with the vehicle-mounted battery through a DC-DC converter, which is used to convert the voltage output by the vehicle-mounted battery into a voltage suitable for the electrochromic film.

7. The dim-to-warm ambient light skyllight of claim 1, wherein, The electrochromic film includes: first electric substrate, ion storage layer, electrolyte layer, electrochromic layer and second electric substrate are sequentially stacked from top to bottom.

8. The dim-to-warm ambient light sky light of claim 7, wherein, The ion storage layer uses nickel oxide, and the electrochromic layer uses tungsten oxide or vanadium oxide;Or, The ion storage layer uses tungsten oxide or vanadium oxide, and the electrochromic layer uses Prussian blue.

9. The dim-to-warm ambient light sky light of claim 7, wherein, The electrolyte layer uses at least one of H2SO4 / PVA gel, KOH / PVA gel and LiClO4 / PMMA gel.

10. A control method of a dimmable ambient light sunroof, applied to the dimmable ambient light sunroof according to any one of claims 1 to 9, characterized in that, The control method includes: Powering the LED lamp film with the electrochromic film.

11. The control method of the dimmable ambiance lamp sunroof according to claim 10, characterized in that, The electrochromic film powers the LED lamp film after power off. Further includes:

12. The control method of the dimmable ambiance lamp sunroof according to claim 10, characterized in that, ​ The electrochromic film is colored when energized, and a light modulation range of a visible light transmittance of the electrochromic film after being colored changes with a voltage change after the electrochromic film is energized. The electrochromic film is colored when energized, and a light modulation range of a visible light transmittance of the electrochromic film after being colored changes with a voltage change after the electrochromic film is energized.

Images