WO2020238524A1 - Electrochromic device and control method therefor, electronic apparatus and storage medium - Google Patents

Abstract

Provided is a control method for an electrochromic device (10), comprising: step S10, applying a first voltage to an electrode pair (12) so as to color an electrochromic material (11); step S20, after the electrochromic material (11) is colored, applying a second voltage to the electrode pair (12) so as to decolor the electrochromic material (11), the second voltage having a polarity opposite to that of the first voltage; and step S30, after the second voltage is applied to the electrode pair (12) and is maintained for a first duration, short-circuiting the electrode pair (12) for a second duration so that the transmittance of the electrochromic material (11) is higher than a set value. Further disclosed are an electrochromic device (10), an electronic apparatus (100) and a storage medium.

Description

Electrochromic device and its control method, electronic equipment and storage medium

Priority information

This application requests the priority and rights of the patent application with application number 201910472454.1 filed with the State Intellectual Property Office of China on May 31, 2019, and the full text is incorporated herein by reference.

Technical field

This application relates to the technical field of consumer electronics, and more specifically to an electrochromic device and its control method, electronic equipment and storage medium.

Background technique

In the related art, the electrochromic device can undergo a reversible color change under the action of an external electric field. Among them, the electrochromic device can color the electrochromic material by applying a voltage to the electrodes on both sides of the electrochromic material to change the transparency. The overrate allows the electrochromic material to switch between the transparent state and the colored state. After the electrochromic material is colored, the electrochromic material can be faded by shorting the electrode pair, but the discoloration speed is slow, and the electrochromic material can be quickly faded by applying a reverse voltage to the electrode pair, but it is easy to cause the color to be repeated after the fade Coloring.

Summary of the invention

The embodiments of the present application provide an electrochromic device and its control method, electronic equipment and storage medium.

The control method of the embodiment of the present application is used to control an electrochromic device, and the control method includes: applying a first voltage to the electrochromic material to color the electrochromic material; and after the electrochromic material is colored Applying a second voltage to the electrochromic material to fade the electrochromic material, the second voltage is opposite in polarity to the first voltage; and applying the second voltage to the electrochromic material continues After the first time period, the electrode pair is short-circuited for the second time period so that the transmittance of the electrochromic material is higher than the set value.

The electrochromic device of the embodiment of the present application includes a driving module, an electrochromic material, and an electrode pair electrically connected to the electrochromic material. The driving module is connected to the electrode pair, and the driving module is used to The electrode pair applies a first voltage to color the electrochromic material and applies a second voltage to the electrode pair to fade the electrochromic material after the electrochromic material is colored, and the second The voltage is opposite to the polarity of the first voltage, and the driving module is also used to short-circuit the electrode pair for a second period after applying the second voltage to the electrode pair for a first period of time so that the The transmittance of the color-changing material is higher than the set value.

The electronic equipment of the embodiment of the present application includes an electrochromic device, a processor, a memory, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the control of the above embodiment is realized. method.

The storage medium of the embodiment of the present application stores a computer program, and when the computer program is executed by a processor, the control method of the above embodiment is implemented.

In the control method, electrochromic device, electronic device, and storage medium of this embodiment, when the electrochromic material fades, a reverse voltage can be applied to the electrochromic material to make the electrochromic material quickly change color. Then, the electrochromic material is short-circuited, so that the electrochromic material reaches a certain transmittance, which ensures that the electrochromic material realizes rapid color change and avoids the problem of repeated coloring of the electrochromic material.

The additional aspects and advantages of the present application will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a schematic flowchart of a control method according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a module of an electrochromic device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of an electrochromic device according to an embodiment of the present application.

FIG. 4 is another schematic diagram of the structure of the electrochromic device according to the embodiment of the present application.

Fig. 5 is a schematic diagram of a transmittance-wavelength curve of an electrochromic material according to an embodiment of the present application.

FIG. 6 is a schematic diagram of the transmittance change of the electrochromic material according to the embodiment of the present application when a reverse voltage is applied.

FIG. 7 is another flowchart of the control method of the embodiment of the present application.

FIG. 8 is a schematic diagram of a circuit model of an electrochromic material according to an embodiment of the present application.

FIG. 9 is a schematic diagram of modules of an electronic device according to an embodiment of the present application.

Description of main drawing components:

Electronic equipment 100, electrochromic device 10, electrochromic material 11, color changing layer 112, electrolyte layer 114, ion storage layer 116, electrode pair 12, first electrode 122, second electrode 124, driving module 13, voltage conversion circuit 132, control unit 134, switching circuit 136, first switching tube 1362, second switching tube 1364, third switching tube 1366, fourth switching tube 1368, temperature sensor 14, voltage sensor 15, plastic frame 16, substrate 17, processing器20, memory 30.

Detailed ways

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The following embodiments described with reference to the drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

1 and 2, the control method of the embodiment of the present application is used to control the electrochromic device 10. The electrochromic device 10 includes an electrochromic material 11 and an electrode pair 12 electrically connected to the electrochromic material 11. Methods include:

Step S10, applying a first voltage to the electrode pair 12 to color the electrochromic material 11;

Step S20, after the electrochromic material 11 is colored, a second voltage is applied to the electrode pair 12 to discolor the electrochromic material 11; and

In step S30, after the second voltage is applied to the electrode pair 12 for the first time period, the electrode pair 12 is short-circuited for the second time period so that the transmittance of the electrochromic material 11 is higher than the set value.

Wherein, the polarity of the second voltage is opposite to that of the first voltage.

Specifically, the electrochromic device 10 further includes a driving module 13, and step S10, step S20 and step S30 can be implemented by the driving module 13. In other words, the driving module 13 can be used to apply a first voltage to the electrode pair 12 to color the electrochromic material 11, and to apply a second voltage to the electrode pair 12 to make the electrochromic material 11 colored The discoloration of the electrochromic material 11 is used to short the electrode pair 12 for a second period after the second voltage is applied to the electrode pair 12 for the first period of time so that the transmittance of the electrochromic material 11 is higher than the set value and becomes transparent .

It can be understood that the electrochromic device 10 can apply a voltage to the electrochromic material 11 through the electrode pair 12, that is to say, in the description of this application, applying a voltage to the electrode pair 12 can be understood as applying a voltage to the electrochromic material 11. Voltage. Correspondingly, short-circuiting the electrode pair can realize the short-circuiting of the electrochromic material, and disconnecting the electrode pair can realize the disconnection of the electrochromic material to disconnect the electrode pair and the electrochromic material from the circuit.

In the electrochromic device 10 and the control method of the embodiment of the present application, when the electrochromic material 11 fades, a reverse voltage is first applied to the electrochromic material 11 to make the electrochromic material 11 quickly change color, and after a period of time The electrochromic material 11 is then short-circuited, so that the electrochromic material 11 reaches a certain transmittance, which ensures that the electrochromic material 11 realizes rapid discoloration and avoids the problem of repeated coloring of the electrochromic material 11.

It should be noted that in the description of the embodiments of this application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features quantity. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features.

In some embodiments, the electrochromic material 11 may be an organic electrochromic material 11 or an inorganic electrochromic material 11. In the example of the present application, the electrochromic material 11 is an organic electrochromic material 11.

Specifically, FIG. 3 shows the electrochromic material 11 with an organic sub-layered structure. At this time, the electrochromic device 10 may include a first electrode 122, a color changing layer 112, and a second electrode 124 that are stacked, and the color changing layer 112 The plastic frame 16 can be used to encapsulate between the first electrode 122 and the second electrode 124, and applying voltage to the first transparent electrode and the second electrode 124 can make the color changing layer 112 color. FIG. 4 shows the electrochromic material 11 with an organic polymer laminated structure. At this time, the electrochromic device 10 may include a first electrode 122, a color changing layer 112, an electrolyte layer 114, an ion storage layer 116, and a second electrode 124 that are stacked. The electrolyte layer 114 can be encapsulated between the first electrode 122 and the second electrode 124 by the plastic frame 16. Applying voltage to the first electrode 122 and the second electrode 124 can cause the electrolyte layer 114 to electrolyze and generate electron migration, so that the color changing layer 112 is colored . In the above two laminated structures, the first electrode 122 and the second electrode 124 constitute the electrode pair 12 of the electrochromic device 10. In the embodiment of the present application, the first electrode 122 and the second electrode 124 are respectively arranged on both sides of the electrochromic material 11.

Further, the side of the first electrode 122 away from the electrochromic layer 112 and the side of the second electrode 124 away from the electrochromic layer 112 may be provided with a substrate 17 respectively. The substrate 17 can protect the electrode and the electrochromic material 11 to ensure The reliability of the electrochromic device 10. Among them, the substrate 17 may be a transparent substrate. In this way, the electrochromic device 10 can maintain better optical characteristics in a transparent state. The transparent substrate may be glass, PET, or the like.

Specifically, the first electrode 122 and the second electrode 124 are made of a transparent conductive material. In this way, the transparent conductive material can have better optical properties while achieving electrical connection, ensuring the transparency of the electrochromic device 10 in a transparent state. Overrate. In an example, the transparent conductive material may be Indium-Tin Oxide (ITO).

In some embodiments, the set value of the transmittance may be a value between 75% and 90%. In this way, the electrochromic device 10 can maintain better optical characteristics when the transmittance is higher than the set value. It should be noted that, in the embodiment of the present application, the set value of the transmittance is less than the maximum transmittance that the electrochromic material 11 can achieve without the action of voltage, that is, less than that after the electrochromic material 11 is completely faded The maximum transmittance. In one example, if the transmittance of the electrochromic material 11 is higher than the preset value, it may be that the transmittance of the electrochromic material 11 reaches the maximum transmittance after the color is completely faded.

It can be understood that the magnitude of the first voltage and the second voltage can be set according to the characteristics of the electrochromic material 11. FIG. 5 shows the transmittance-wavelength curve of the electrochromic material 11 of the embodiment of the application under different voltages. Among them, the corresponding relationship between the voltage applied to the electrode pair 12 and the current and impedance is as follows:

Voltage/V	Current/mA	Impedance/Ω
1.3	14	92.85714
1.2	14	85.71429
1.1	14	78.57143
1	13.6	73.52941
0.9	11.8	76.27119
0.8	10.9	73.3945

From Figure 5 in conjunction with the corresponding relationship between the voltage applied to the electrode pair 12 and the current and impedance, it can be seen that when different voltage values are applied to the electrode pair 12, the transmittance of the electrochromic material 11 will change. When 0.8-1V is applied, the electricity The transmittance change of the chromic material 11 is small, and the data power consumption is stable. When the voltage continues to reach 1.1V-1.2V, the transmittance of the electrochromic material 11 is further reduced, but its power consumption changes little, the electrochemical reaction of the electrochromic material 11 is saturated, and the applied voltage can no longer continue The electrochromic material 11 undergoes a color change.

In some embodiments, the first voltage may be the voltage required for the electrochromic material 11 to achieve low transmittance to achieve coloring. Specifically, the first voltage may be 0.8V to 1.2V. In this way, the electrochromic material 11 The color changing device 10 achieves a low transmittance. For example, if the transmittance of the electrochromic device 10 is less than 30%, the electrochromic device 10 can achieve better coloration. Preferably, the first voltage may be 0.8V to 1V. In the example of this application, the first voltage is 1V.

In some embodiments, the second voltage may be the saturation voltage of the electrochemical reaction of the electrochromic material 11. Specifically, the second voltage may be -1.1V to -1.2V. In this way, the second voltage can make the electrochromic Material 11 undergoes a rapid reverse reaction to achieve rapid fading. In the example of this application, the second voltage is -1.2V.

Correspondingly, the first time length and the second time length can be set according to the characteristics of the electrochromic material 11. As shown in FIG. 6, the reverse voltage is always applied after the electrochromic material 11 is colored, and the Δ The transmittance of the electrochromic material 11 continues to increase within t, and the electrochromic material 11 has faded. However, after a period of Δt, the electrochromic material 11 will recolor.

In this way, the first time period is determined by the time Δt from the minimum transmittance of the electrochromic material 11 when the second voltage is applied to the maximum transmittance that the electrochromic material 11 can achieve under the action of the second voltage, and thus During the first time period when the second voltage is applied, the electrochromic material 11 can realize rapid color change.

In addition, after an error occurs in the control so that the second voltage is applied for the first time period, the transmittance of the electrochromic material 11 fails to reach the set value, that is, the electrochromic material 11 has not completely faded or recolored. The electrode pair 12 is short-circuited to neutralize the internal charges of the electrochromic material 11 and further increase the transmittance of the electrochromic material 12 so that the transmittance of the electrochromic material 11 is higher than the set value.

In some embodiments, continuous application of the second voltage will not make the transmittance of the electrochromic material 11 reach the maximum transmittance after the color is completely faded.

It can be understood that when the second voltage fails to make the transmittance of the electrochromic material 11 reach the maximum transmittance after complete fading, after the second voltage is applied for the first period of time, even if the transmittance of the electrochromic material 11 If the transmittance is higher than the set value, shorting the electrode pair 12 can also neutralize the internal charges of the electrochromic material 11, further increase the transmittance of the electrochromic material 11, and increase the optical performance of the electrochromic material 11.

In particular, when the second voltage cannot make the transmittance of the electrochromic material 11 higher than the set value, the electrode pair 12 can be short-circuited after the second voltage is applied to make the internal charge of the electrochromic material 11. After neutralization, the transmittance of the electrochromic material 11 is higher than the set value and becomes transparent.

In addition, when there is an error in the control that the time for applying the second voltage is too short or too long, the transmittance of the electrochromic material 11 may not reach the set value. At this time, short-circuiting the electrode pair 12 can also make the electrochromic The internal charge of the material 11 is neutralized, and finally the transmittance of the electrochromic material 11 is higher than the set value and becomes transparent.

Specifically, the second time period is from the maximum transmittance that the electrochromic material 11 can achieve when the second voltage is applied to the transmittance of the electrochromic material 11 when the electrode pair 12 is short-circuited. The time taken to determine the overrate. The second time period can be obtained by experimental measurement and stored in the electrochromic device 10.

In certain embodiments, the electrochromic device 10 includes a temperature sensor 14. The temperature sensor 14 is used to detect the temperature of the electrochromic material 11. The control method includes: determining a first duration and a second duration according to the temperature of the electrochromic material 11, wherein the temperature of the electrochromic material 11 is inversely related to the first duration and the second duration.

Specifically, the driving unit may be used to determine the first duration and the second duration according to the temperature of the electrochromic material 11.

It is understandable that the activity of the electrochromic material 11 at different temperatures will be affected by the temperature, so that the electrochemical reaction time is different. Specifically, the lower the temperature of the electrochromic material 11, the lower the activity of the electrochromic material 11, and the longer the electrochemical reaction time.

In this way, the parameters can be selected according to the corresponding relationship between the temperature of the electrochromic material 11 and the first and second durations, so as to control the color change process of the electrochromic material 11, and realize that the electrochromic device 10 can achieve rapid speed at different temperatures. Discoloration.

In an example, when the magnitude of the second voltage is -1.2V, the corresponding relationship between the temperature of the electrochromic material 11 and the first duration and the second duration is as follows:

Temperature/℃	Second voltage	First time/s	Second duration/s
40	-1.2V	0.2	0.2
30	-1.2V	0.2	0.3
20	-1.2V	0.2	0.35
10	-1.2V	0.3	0.55
0	-1.2V	0.35	0.8
-5	-1.2V	0.4	1.1
-10	-1.2V	0.5	1.2
-20	-1.2V	0.8	1.35

The above table lists the first duration of applying the second voltage to the electrode pair 12 and the second duration of shorting the electrode pair 12 when the electrochromic material 11 is controlled to fade under certain temperature conditions. According to the temperature data listed above, interpolation can be used to calculate the first duration of applying the second voltage to the electrode pair 12 and the second duration of shorting the electrode pair 12 under other temperature conditions.

Of course, in other embodiments, the corresponding relationship between the temperature and the first time period and the second time period can also be set in the manner of temperature intervals. For example, in an example, when the temperature is (30°C, 40°C), the corresponding first duration may be 0.2S, and the corresponding second duration may be 0.2S.

Wherein, the corresponding relationship between the temperature and the first time period and the second time period can be maintained in the electrochromic device 10 so that the electrochromic device 10 controls the electrochromic material 11.

It should be noted that in the corresponding relationship between the temperature and the first duration and the second duration listed above, the numerical values of the temperature, the first duration, and the second duration are only examples, and cannot be understood as a limitation of the application. In other embodiments In, the numerical values of the temperature, the first duration, and the second duration are set according to the actual situation, and there is no specific limitation here.

In the illustrated embodiment, the temperature sensor 14 directly detects the temperature of the electrochromic material 11. In other embodiments, the temperature sensor 14 can also obtain the temperature of the electrochromic material 11 by detecting the temperature of the electrode pair 12.

Referring to FIG. 7, in some embodiments, the electrochromic device 10 includes a voltage sensor 15, and the voltage sensor 15 is used to detect the voltage between the electrode pair 12, that is, the voltage sensor 15 is used to detect the two electrochromic materials 11 Side voltage, the control method includes step S1 including:

Step S12, applying a first voltage to the electrode pair 12 when the voltage between the electrode pair 12 is less than the first preset voltage; and

In step S14, the electrode pair 12 is disconnected when the voltage between the electrode pair 12 reaches a second preset voltage.

Wherein, the second preset voltage is greater than the first preset voltage, and the first voltage is not less than the second preset voltage.

Specifically, step S12 and step S14 can be implemented by the driving module 13. That is to say, the driving module 13 can be used to apply the first voltage to the electrode pair 12 when the voltage between the electrode pair 12 is less than the first preset voltage and for the voltage between the electrode pair 12 to reach the second preset voltage. The electrode pair 12 is disconnected when voltage is applied.

As shown in Figure 8, the electrochromic material 11 can be simplified as a parallel model of a capacitor and a resistor. The material is always pressurized for coloring. The resistance characteristic will consume a certain amount of static power consumption, while the charge of the capacitor does not increase, so The electrochromic device 10 generates large static power consumption. It can be understood that when the voltage of the capacitor is lower than the first preset voltage, applying the first voltage to the electrode pair 12 can be equivalent to charging the capacitor. At this time, the voltage on both sides of the electrochromic material 11 gradually increases; After the voltage reaches the second preset voltage, disconnecting the electrode pair 12 can be equivalent to capacitive discharge. At this time, the voltage on both sides of the electrochromic material 11 gradually decreases.

In this way, step S12 and step S14 can keep the voltage on both sides of the electrochromic material 11 between the first preset voltage and the second preset voltage, so as to realize intermittent application of voltage to the electrochromic material 11 and reduce electrochromic Static consumption of material 11.

Specifically, when the voltage applied by the electrochromic material 11 is maintained between the first preset voltage and the second preset voltage, the electrochromic material 11 can achieve a lower transmittance to achieve coloring. In an example, the first voltage may be 1V, the first preset voltage may be 0.8V, and the second preset voltage may be 1V.

In this way, the voltage at both ends of the electrochromic material 11 has a small transmittance change between 0.8 and 1V, and the static power consumption can be reduced by intermittently pressurizing the electrochromic material 11 without affecting the material's performance. Discoloration effect.

Specifically, disconnecting the electrode pair 12 refers to disconnecting the circuit connected to the electrode pair 12, and at this time, the electrode pair 12 is in a floating state.

In some embodiments, the driving module 13 includes a voltage conversion circuit (buck circuit) 132, and the voltage conversion circuit 132 is connected to the electrode pair 12 and used to provide the electrode pair 12 with a first voltage and a second voltage.

In this way, the voltage conversion circuit 132 can be used as a power source to provide a stable voltage to the electrode pair 12. Wherein, the voltage output by the voltage conversion circuit 132 can be adjusted by a pulse width modulation signal, and a power supply can be used to meet the different voltage requirements of the electrochromic device 10.

In some embodiments, the driving module 13 includes a control unit 134 and a switch circuit 136, and the switch circuit 136 is connected to the voltage conversion circuit 132, the control unit 134 and the electrode pair 12. The control unit 134 is used to control the switch circuit 136 to control the direction of applying voltage to the electrode pair 12, short-circuit the electrode pair 12, or disconnect the electrode pair 12.

Further, the switch circuit 136 includes a first switch tube connected to the voltage conversion circuit 132, the control unit 134 and the first electrode 122; a second switch tube 1364 connected to the first electrode 122, the control unit 134 and the ground; and connected to the voltage conversion circuit 132 , The third switch tube 1366 of the control unit 134 and the second electrode 124; and the fourth switch tube 1368 connected to the second electrode 124, the control unit 134 and the ground.

In this way, the switch circuit 136 can be an H-bridge circuit composed of four switch tubes, wherein the control unit 134 can be connected to the base of each switch tube to control the switch tube to be turned on or off.

Specifically, the control unit 134 can be used to control the first switching tube 1362 and the fourth switching tube 1368 to turn on, and the second switching tube 1364 and the third switching tube 1366 to turn off to apply the first voltage to the electrode pair 12. The first electrode 122 is connected to the voltage conversion circuit 132, the second electrode 124 is grounded, and the first voltage applied by the electrode pair 12 may be a forward voltage. The electrochromic material 11 is colored under the action of the first voltage.

The control unit 134 can be used to control the second switching tube 1364 and the third switching tube 1366 to turn on, and the first switching tube 1362 and the fourth switching tube 1368 to turn off to apply the second voltage to the electrode pair 12. The electrode 122 is grounded, the second electrode 124 is connected to the voltage conversion circuit 132, and the first voltage applied by the electrode pair 12 is a reverse voltage of the first voltage. The electrochromic material 11 can quickly fade under the action of the second voltage.

The control unit 134 can be used to control the second switching tube 1364 and the fourth switching tube 1368 to turn on, and the first switching tube 1362 and the third switching tube 1366 to turn off to short the electrode pair 12. At this time, the first electrode 122 and The second electrodes 124 are all grounded, the electrode pair 12 is short-circuited, and the electric charge inside the electrochromic material 11 is neutralized, so that the transmittance of the electrochromic material 11 reaches the set value.

The control unit 134 can also be used to control the first switching tube 1362, the second switching tube 1364, the third switching tube 1366, and the fourth switching tube 1368 to disconnect to disconnect the electrode pair 12. At this time, the first electrode 122 and The second electrode 124 is not connected to the circuit, and the transmittance of the electrochromic material 11 can be maintained at the set value.

In some embodiments, the control unit 134 may be a micro control unit 134 (MCU).

In this way, the micro-control unit 134 can be integrated into the electrochromic device 10 to control the state of each switch in the switch circuit 136.

Specifically, step S12 and step S14 may be implemented by the control unit 134. The control unit 134 can control the on and off of the switch tube according to the voltage detected by the voltage sensor 15 so as to apply the first voltage to the electrode pair 12 intermittently.

The electronic device 100 of the embodiment of the present application includes an electrochromic device 10, a processor 20, a memory 30, and a computer program stored on the memory 30 and running on the processor 20. When the processor 20 executes the program, it can implement the control method of any of the foregoing embodiments.

In an example, when the processor 20 executes the program, the following steps may be implemented:

Step S10, applying a first voltage to the electrode pair 12 to color the electrochromic material 11;

Step S20, after the electrochromic material 11 is colored, a second voltage is applied to the electrode pair 12 to discolor the electrochromic material 11; and

In step S30, after the second voltage is applied to the electrode pair 12 for the first time period, the electrode pair 12 is short-circuited for the second time period so that the transmittance of the electrochromic material 11 reaches the set value.

Wherein, the polarity of the second voltage is opposite to that of the first voltage.

In the electronic device 100 of the embodiment of the present application, the processor 20 executes a program to first apply a reverse voltage to the electrochromic material 11 to quickly change the color of the electrochromic material 11 when the electrochromic material 11 fades, and then, after a while The electrochromic material 11 is short-circuited so that the electrochromic material 11 reaches a certain transmittance, which ensures that the electrochromic material 11 realizes rapid discoloration and avoids the problem of repeated coloring of the electrochromic material 11.

In some embodiments, the electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a wearable device, and the like. In the illustrated embodiment, the electronic device 100 is a mobile phone.

Specifically, the electronic device 100 may use a transparent housing, for example, a glass back cover or a ceramic back cover. The electrochromic device 10 can be arranged on a transparent casing, and the electronic components in the transparent casing can be blocked or displayed by controlling the transmittance of the electrochromic device 10. Of course, the electronic device 100 may also be provided with a decorative element, for example, a decorative film, and the electrochromic device 10 may be used to block or display the decorative film, so that the appearance of the electronic device 100 can be changed according to the electrochromic state. The diversified design of the appearance of the electronic device 100 is realized.

A computer program is stored on the storage medium of the embodiment of the present application, and when the program is executed by the processor 20, the control method of any of the above embodiments is implemented.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments" or "an example" etc. means that a specific feature, structure, material or characteristic described in conjunction with the embodiment or example is included in this In at least one embodiment or example of the application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Those of ordinary skill in the art can understand that all or part of the steps carried in the method of the foregoing embodiments can be implemented by a program instructing relevant hardware to complete. The program can be stored in a computer-readable storage medium. When executed, it includes one of the steps of the method embodiment or a combination thereof.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer readable storage medium.

The aforementioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The implementation is subject to changes, modifications, replacements and modifications.

Claims (20)

1. A control method of an electrochromic device, characterized in that the control method includes:

   Applying a first voltage to the electrochromic material to color the electrochromic material;

   After the electrochromic material is colored, a second voltage is applied to the electrochromic material to fade the electrochromic material, the second voltage is opposite in polarity to the first voltage; and

   After the second voltage is applied to the electrochromic material for a first period of time, the electrochromic material is short-circuited for a second period of time so that the transmittance of the electrochromic material is higher than a set value.
2. The control method according to claim 1, wherein the first voltage is 0.8V to 1.2V, and the second voltage is -1.1V to -1.2V.
3. The control method according to claim 1, wherein the control method comprises:

   The first duration and the second duration are determined according to the temperature of the electrochromic material, and the temperature of the electrochromic material is inversely related to the first duration and the second duration.
4. The control method according to claim 1, wherein the control method comprises:

   Applying a first voltage to the electrochromic material when the voltage on both sides of the electrochromic material is less than a first preset voltage; and

   When the voltage on both sides of the electrochromic material reaches a second preset voltage, the electrochromic material is disconnected, the second preset voltage is greater than the first preset voltage, and the second preset voltage Less than or equal to the first voltage.
5. The control method according to claim 1, wherein the set value is a value between 75% and 90%.
6. The control method according to claim 1, wherein the electrochromic material comprises an organic electrochromic material or an inorganic electrochromic material.
7. An electrochromic device, characterized in that it comprises:

   Electrochromic materials;

   A pair of electrodes electrically connected to the electrochromic material; and

   A driving module connected to the electrode pair, the driving module is used to apply a first voltage to the electrode pair to color the electrochromic material and to apply a first voltage to the electrode pair after the electrochromic material is colored A second voltage is applied to fade the electrochromic material, the second voltage is opposite in polarity to the first voltage, and the driving module is also used to continue applying the second voltage to the electrode pair. After the first time period, the electrode pair is short-circuited for the second time period so that the transmittance of the electrochromic material is higher than the set value.
8. 8. The electrochromic device according to claim 7, wherein the first voltage is 0.8V to 1.2V, and the second voltage is -1.1V to -1.2V.
9. The electrochromic device according to claim 7, wherein the electrochromic device comprises a temperature sensor, and the temperature sensor is used to detect the temperature of the electrochromic material;

   The driving module is configured to determine the first duration and the second duration according to the temperature of the electrochromic material, and the temperature of the electrochromic material is inversely related to the first duration and the second duration .
10. The electrochromic device according to claim 7, wherein the electrochromic device comprises a voltage sensor, and the voltage sensor is used to detect the voltage between the electrode pair;

    The driving module is used for applying a first voltage to the electrode pair when the voltage between the electrode pair is less than a first preset voltage and for when the voltage between the electrode pair reaches a second preset voltage When the electrode pair is disconnected, the second preset voltage is greater than the first preset voltage, and the second preset voltage is less than or equal to the first voltage.
11. 7. The electrochromic device according to claim 7, wherein the set value is a value between 75% and 90%.
12. 8. The electrochromic device according to claim 7, wherein the electrochromic material comprises an organic electrochromic material or an inorganic electrochromic material.
13. The electrochromic device according to claim 7, wherein the driving module comprises a voltage conversion circuit, and the voltage conversion circuit is connected to the electrode pair and used to provide the electrode pair with the first voltage and the Mentioned second voltage.
14. The electrochromic device according to claim 13, wherein the driving module comprises a control unit and a switch circuit, and the switch circuit is connected to the voltage conversion circuit, the control unit and the electrode pair;

    The control unit is used to control the switch circuit to control the polarity of the voltage applied to the electrode pair, short-circuit the electrode pair or disconnect the electrode pair.
15. The electrochromic device according to claim 14, wherein the electrode pair comprises a first electrode and a second electrode respectively arranged on both sides of the electrochromic material;

    The switch circuit includes:

    A first switch tube connected to the voltage conversion circuit, the control unit and the first electrode;

    A second switch tube connected to the first electrode, the control unit and the ground;

    A third switch tube connected to the voltage conversion circuit, the control unit and the second electrode; and

    A fourth switch tube connected to the second electrode, the control unit and the ground;

    The control unit is used to control the first switching tube and the fourth switching tube to be turned on, and the second switching tube and the third switching tube to turn off to apply a first voltage to the electrode pair.
16. The electrochromic device according to claim 15, wherein the control unit is used to control the conduction of the second switching tube and the third switching tube, and the first switching tube and the fourth switching tube The switch tube is turned off to apply a second voltage to the electrode pair.
17. The electrochromic device according to claim 15, wherein the control unit is used to control the conduction of the second switching tube and the fourth switching tube, and the first switching tube and the third switching tube The switch tube is opened to short-circuit the electrode pair.
18. The electrochromic device according to claim 15, wherein the control unit is used to control the first switching tube, the second switching tube, the third switching tube, and the fourth switching tube to turn off To disconnect the electrode pair.
19. An electronic device, characterized by comprising: an electrochromic device, a processor, a memory, and a computer program stored in the memory and running on the processor. The processor executes the computer program according to the claims. The control method described in any one of 1-6.
20. A storage medium with a computer program stored thereon, wherein the computer program implements the control method according to any one of claims 1-6 when the computer program is executed by a processor.

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