CN110032019B - Electrochromic device, control method thereof, electronic apparatus, and storage medium - Google Patents
Electrochromic device, control method thereof, electronic apparatus, and storage medium Download PDFInfo
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- CN110032019B CN110032019B CN201910472454.1A CN201910472454A CN110032019B CN 110032019 B CN110032019 B CN 110032019B CN 201910472454 A CN201910472454 A CN 201910472454A CN 110032019 B CN110032019 B CN 110032019B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/38—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using electrochromic devices
Abstract
The invention discloses a control method, an electrochromic device, an electronic apparatus, and a storage medium. The control method is used for controlling the electrochromic device. The control method comprises the following steps: applying a first voltage to the electrochromic material to color the electrochromic material; applying a second voltage to the electrochromic material after the electrochromic material is colored to discolor the electrochromic material, the second voltage being opposite in polarity to the first voltage; and after the second voltage is applied to the electrochromic material for the first time period, the electrochromic material is short-circuited for a second time period so that the transmittance of the electrochromic material is higher than a set value. The control method, electrochromic device, electronic apparatus and storage medium of the present invention can prevent re-coloring while rapidly discoloring due to reverse application of the second voltage and then short-circuiting.
Description
Technical Field
The present invention relates to the field of consumer electronics, and more particularly, to an electrochromic device, a control method thereof, an electronic apparatus, and a storage medium.
Background
In the related art, an electrochromic device may undergo a reversible color change under the action of an external electric field, wherein the electrochromic device may change transmittance by coloring an electrochromic material by applying a voltage to electrode pairs at both sides of the electrochromic material, so that the electrochromic material may be switched between a transparent state and a colored state. The electrochromic material can be discolored by a short-circuit electrode pair after being colored, but the discoloring speed is slow, or the electrochromic material can be discolored rapidly by applying a reverse voltage to the electrode pair, and the repeated coloring after the discoloring is easily caused.
Disclosure of Invention
The embodiment of the invention provides an electrochromic device, a control method thereof, electronic equipment and a storage medium.
The control method of the embodiment of the invention is used for controlling the electrochromic device, and comprises the following steps: applying a first voltage to an electrochromic material to color the electrochromic material; applying a second voltage to the electrochromic material after the electrochromic material is colored to discolor the electrochromic material, the second voltage being opposite in polarity to the first voltage; and shorting the electrode pair for a second time period after applying a second voltage to the electrochromic material for the first time period to make the transmittance of the electrochromic material higher than a set value.
The electrochromic device comprises a driving module, an electrochromic material and a pair of electrodes electrically connected with the electrochromic material, wherein the driving module is connected with the pair of electrodes, the driving module is used for applying a first voltage to the pair of electrodes to color the electrochromic material and applying a second voltage to the pair of electrodes after the electrochromic material is colored to fade the electrochromic material, the second voltage is opposite to the first voltage in polarity, and the driving module is further used for short-circuiting the pair of electrodes for a second time after the second voltage is applied to the pair of electrodes for a first time to enable the transmittance of the electrochromic material to be higher than a set value.
The electronic device of the embodiment of the invention comprises an electrochromic device, a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the computer program, the control method of the embodiment is realized.
The storage medium of the embodiment of the present invention stores a computer program that realizes the control method of the above-described embodiment when executed by a processor.
In the control method, the electrochromic device, the electronic device and the storage medium of the embodiment, when the electrochromic material fades, the reverse voltage is firstly applied to the electrochromic material to enable the electrochromic material to quickly change color, and then the short circuit is carried out on the electrochromic material after a period of time, so that the electrochromic material achieves a certain transmittance, the electrochromic material is enabled to realize quick color change, and the problem of repeated coloring of the electrochromic material is avoided.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart illustrating a control method according to an embodiment of the present invention.
Fig. 2 is a block schematic diagram of an electrochromic device according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of an electrochromic device according to an embodiment of the present invention.
Fig. 4 is another schematic structural diagram of an electrochromic device according to an embodiment of the present invention.
Fig. 5 is a graph showing transmittance vs. wavelength curves for electrochromic materials according to embodiments of the invention.
Fig. 6 is a schematic diagram showing the transmittance change of the electrochromic material according to the embodiment of the present invention when a reverse voltage is applied.
Fig. 7 is another flow chart of the control method according to the embodiment of the present invention.
Fig. 8 is a schematic diagram of a circuit model of an electrochromic material according to an embodiment of the present invention.
Fig. 9 is a block diagram of an electronic device according to an embodiment of the present invention.
Description of the main element symbols:
the electronic device 100, the electrochromic device 10, the electrochromic material 11, the color-changing layer 112, the electrolyte layer 114, the ion storage layer 116, the electrode pair 12, the first electrode 122, the second electrode 124, the driving module 13, the voltage conversion circuit 132, the control unit 134, the switching circuit 136, the first switching tube 1362, the second switching tube 1364, the third switching tube 1366, the fourth switching tube 1368, the temperature sensor 14, the voltage sensor 15, the rubber frame 16, the substrate 17, the processor 20, and the memory 30.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1 and 2, a control method according to an embodiment of the present invention is used for controlling an electrochromic device 10, where the electrochromic device 10 includes an electrochromic material 11 and a pair of electrodes 12 electrically connected to the electrochromic material 11, and the control method includes:
a step S10 of applying a first voltage to the electrode pair 12 to color the electrochromic material 11;
step S20, applying a second voltage to the pair of electrodes 12 after the electrochromic material 11 is colored to discolor the electrochromic material 11; and
step S30, after applying the second voltage to the electrode pair 12 for the first duration, shorting the electrode pair 12 for a second duration to make the transmittance of the electrochromic material 11 higher than the set value.
Wherein the second voltage is opposite in polarity to the first voltage.
Specifically, the electrochromic device 10 further includes a driving module 13, and the step S10, the step S20, and the step S30 may be implemented by the driving module 13. That is, the driving module 13 may be configured to apply a first voltage to the electrode pair 12 to color the electrochromic material 11, apply a second voltage to the electrode pair 12 after the electrochromic material 11 is colored to fade the electrochromic material 11, and short the electrode pair 12 for a second time period after the second voltage is applied to the electrode pair 12 for the first time period to make the transmittance of the electrochromic material 11 higher than a set value to become transparent.
It is understood that the electrochromic device 10 may apply a voltage to the electrochromic material 11 through the electrode pair 12, that is, in the description of the present invention, applying a voltage to the electrode pair 12 may be understood as applying a voltage to the electrochromic material 11. Correspondingly, the shorting electrode pair can realize shorting the electrochromic material, and the disconnecting electrode pair can realize disconnecting the electrochromic material so as to disconnect the electrode pair and the electrochromic material from the circuit.
In the electrochromic device 10 and the control method according to the embodiments of the present invention, when the electrochromic material 11 fades, a reverse voltage is applied to the electrochromic material 11 first to rapidly change the color of the electrochromic material 11, and then the short circuit is performed on the electrochromic material 11 after a period of time, so that the electrochromic material 11 reaches a certain transmittance, thereby ensuring that the electrochromic material 11 realizes rapid color change and avoiding the problem of repeated coloring of the electrochromic material 11.
It should be noted that the terms "first" and "second" in the description of the embodiments of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.
In certain embodiments, the electrochromic material 11 may be an organic electrochromic material 11 or an inorganic electrochromic material 11. In an example of the present invention, the electrochromic material 11 is an organic electrochromic material 11.
Specifically, fig. 3 shows the electrochromic material 11 in an organic small layered structure, in this case, the electrochromic device 10 may include a first electrode 122, a color-changing layer 112, and a second electrode 124, which are stacked, the color-changing layer 112 may be encapsulated between the first electrode 122 and the second electrode 124 through a frame 16, and applying a voltage to the first and second electrodes 124 may color the color-changing layer 112. Fig. 4 shows an electrochromic material 11 of an organic polymer laminated structure, in this case, an 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, which are arranged in a laminated manner, where the electrolyte layer 114 may be encapsulated between the first electrode 122 and the second electrode 124 by a frame 16, and applying a voltage to the first electrode 122 and the second electrode 124 may cause the electrolyte layer 114 to undergo electron migration due to electrolysis, so that the color-changing layer 112 is colored. In both of the above-described 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 invention, the first electrode 122 and the second electrode 124 are respectively disposed 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 respectively provided with a substrate 17, and the substrate 17 may protect the electrodes and the electrochromic material 11, ensuring the reliability of the electrochromic device 10. Among them, the substrate 17 may be a transparent substrate, so that the electrochromic device 10 can maintain good optical characteristics in a transparent state. The transparent substrate may be glass, PET, etc.
Specifically, the first electrode 122 and the second electrode 124 are made of transparent conductive materials, so that the transparent conductive materials can have good optical characteristics while achieving electrical connection, and ensure the transmittance of the electrochromic device 10 in a transparent state. In one 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 good optical characteristics in the case where the transmittance is higher than the set value. In the embodiment of the present invention, the set value of the transmittance is smaller than the maximum transmittance that the electrochromic material 11 can not reach under the action of the voltage, that is, smaller than the maximum transmittance after the electrochromic material 11 is completely faded. In one example, the transmittance of the electrochromic material 11 being higher than the preset value may be the maximum transmittance after the transmittance of the electrochromic material 11 reaches the full color fading.
It is understood that the magnitude of the first voltage and the second voltage may be set according to the characteristics of the electrochromic material 11. Fig. 5 shows transmittance vs. wavelength curves of the electrochromic material 11 according to the embodiment of the invention at different voltages. The correspondence between the applied voltage, the current and the impedance of the electrode pair 12 is as follows:
| voltage/V | Current/mA | Impedance/omega |
| 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 |
As can be seen from fig. 5 in conjunction with the corresponding relationship between the voltage applied to the electrode pair 12 and the current and the impedance, when different voltage values are applied to the electrode pair 12, the transmittance of the electrochromic material 11 changes, wherein when 0.8-1V is applied, the transmittance of the electrochromic material 11 changes less, and the data power consumption is stable. When the time voltage is continued to 1.1V-1.2V, the transmittance of the electrochromic material 11 is further reduced, but the power consumption change is small, the electrochemical reaction of the electrochromic material 11 is saturated, and the electrochromic material 11 cannot be changed in color continuously by applying the voltage.
In some embodiments, the first voltage may be a voltage required for the electrochromic material 11 to achieve low transmittance to achieve coloring, and specifically, the first voltage may be 0.8V to 1.2V, so that the electrochromic device 10 may achieve lower transmittance, for example, the transmittance of the electrochromic device 10 is less than 30%, and the electrochromic device 10 may achieve better coloring. Preferably, the first voltage may be 0.8V to 1V. In an example of the present invention, the first voltage is 1V.
In some embodiments, the second voltage may be a saturation voltage of the electrochemical reaction of the electrochromic material 11, and particularly, the second voltage may be-1.1V to-1.2V, so that the second voltage enables the electrochromic material 11 to rapidly perform a reverse reaction, thereby achieving rapid color fading. In an example of the present invention, the second voltage is-1.2V.
Accordingly, the first and second time periods may 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, the transmittance of the electrochromic material 11 is continuously increased for a time Δ t after the second voltage is started to be applied, the electrochromic material 11 is discolored, however, the electrochromic material 11 is re-colored after a period of time Δ t.
Thus, the first time period is determined by the time Δ t taken by the electrochromic material 11 to reach the maximum transmittance at which the electrochromic material 11 fades under the action of the second voltage from the minimum transmittance when the second voltage is applied, so that the electrochromic material 11 can realize rapid color change within the first time period when the second voltage is applied.
In addition, after the control error occurs, so that the second voltage is applied for the first time, the transmittance of the electrochromic material 11 fails to reach the set value, that is, the electrochromic material 11 is not completely faded or recolored, at this time, the electrode pair 12 may be short-circuited, so that the charge in the electrochromic material 11 is neutralized, the transmittance of the electrochromic material 12 is further increased, and the transmittance of the electrochromic material 11 is higher than the set value.
In some embodiments, the continuous application of the second voltage does not cause the transmittance of the electrochromic material 11 to reach the maximum transmittance after complete fading.
It can be understood that, in the case where the second voltage is applied for the first time period without the transmittance of the electrochromic material 11 reaching the maximum transmittance after complete fading, even if the transmittance of the electrochromic material 11 is higher than the set value, the short-circuit electrode pair 12 can neutralize the internal charge 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, in the case where the transmittance of the electrochromic material 11 cannot be made higher than the set value by applying the second voltage, the electrode pair 12 may be short-circuited after the second voltage is applied to neutralize the internal charge of the electrochromic material 11, and finally the transmittance of the electrochromic material 11 is made higher than the set value to become transparent.
In addition, when the control error occurs, so 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, the short-circuit electrode pair 12 may also neutralize the charge inside the electrochromic material 11, and finally, the transmittance of the electrochromic material 11 is higher than the set value, so as to become transparent.
Specifically, the second period of time is determined by the time it takes for the electrochromic material 11 to reach a transmittance higher than a set value or reach a maximum transmittance from the maximum transmittance that can be reached by applying the second voltage when the electrode pair 12 is shorted. The second length of time can be determined experimentally 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 comprises the following steps: the first and second time periods are determined based on the temperature of the electrochromic material 11, wherein the temperature of the electrochromic material 11 is inversely related to the first and second time periods.
In particular, the drive unit may be configured to determine the first and second time periods in dependence on the temperature of the electrochromic material 11.
It is understood that the activity of the electrochromic material 11 is affected by the temperature at different temperatures, 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.
Therefore, parameter selection can be performed according to the corresponding relation between the temperature of the electrochromic material 11 and the first time length and the second time length, so that the color changing process of the electrochromic material 11 is controlled, and the electrochromic device 10 can realize quick color changing at different temperatures.
In one example, the temperature of the electrochromic material 11 corresponding to the first and second time periods for the second voltage of-1.2V is as follows:
| temperature/. degree.C | Magnitude of the second voltage | First duration/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 table lists a first time period for applying a second voltage to the electrode pair 12 and a second time period for shorting the electrode pair 12 when controlling the discoloration of the electrochromic material 11 under some temperature conditions. From the temperature data listed above, the first duration of time for applying the second voltage to the electrode pair 12 and the second duration of time for shorting the electrode pair 12 under other temperature conditions can be calculated by interpolation.
Of course, in other embodiments, the corresponding relationship between the temperature and the first and second time periods may also be set by means of a temperature interval. For example, in one example, where the temperature is (30 ℃, 40 ℃), the corresponding first time period may be 0.2S, and the corresponding second time period may be 0.2S.
The correspondence between the temperature and the first and second time periods can be maintained in the electrochromic device 10, so that the electrochromic device 10 can control the electrochromic material 11.
It should be noted that, in the above listed correspondence relationship between the temperature and the first and second time periods, the numerical values of the temperature, the first time period, and the second time period are only used as examples and are not to be construed as limitations of the present invention, and in other embodiments, the numerical values of the temperature, the first time period, and the second time period are set according to practical situations and are not specifically limited herein.
In the illustrated embodiment, the temperature sensor 14 directly detects the temperature of the electrochromic material 11, and in other embodiments, the temperature sensor 14 may 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, the voltage sensor 15 is used for detecting a voltage between the electrode pair 12, that is, the voltage sensor 15 is used for detecting a voltage across the electrochromic material 11, and the control method includes step S1 including:
a step S12 of applying a first voltage to the electrode pair 12 when the voltage between the electrode pair 12 is less than a 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.
The second preset voltage is greater than the first preset voltage, and the first voltage is not less than the second preset voltage.
Specifically, steps S12 and S14 may be implemented by the driving module 13. That is, the driving module 13 may be configured to apply a first voltage to the electrode pair 12 when the voltage between the electrode pair 12 is less than a first preset voltage and to disconnect the electrode pair 12 when the voltage between the electrode pair 12 reaches a second preset voltage.
As shown in fig. 8, the electrochromic material 11 can be simplified into a parallel model of a capacitor and a resistor, and the material is always pressurized and colored, so that the resistor consumes a certain static power consumption, and the charge amount of the capacitor is not increased, so that the electrochromic device 10 generates a larger static power consumption. It is understood that when the voltage of the capacitor is lower than the first preset voltage, applying the first voltage to the electrode pair 12 may be equivalent to charging the capacitor, and at this time, the voltage on both sides of the electrochromic material 11 gradually increases; and after the voltage of the capacitor reaches the second preset voltage, the electrode pair 12 is disconnected to equivalently discharge as the capacitor, and at the moment, the voltage on the two sides of the electrochromic material 11 is gradually reduced.
In this way, steps S12 and S14 may enable the voltage across the electrochromic material 11 to be maintained between the first preset voltage and the second preset voltage, achieve intermittent application of voltage to the electrochromic material 11, and reduce static consumption of the electrochromic material 11.
In particular, keeping the applied voltage of the electrochromic material 11 between the first preset voltage and the second preset voltage, a lower transmittance of the electrochromic material 11 may be achieved to achieve coloration. In one 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 transmittance change of the voltage between 0.8 and 1V at two ends of the electrochromic material 11 is small, and the static power consumption can be reduced by intermittently pressurizing the electrochromic material 11 without affecting the color change effect of the material.
Specifically, disconnecting the electrode pair 12 refers to opening 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 configured to provide the electrode pair 12 with a first voltage and a second voltage.
In this way, the voltage conversion circuit 132 can serve as a power supply to supply a stable voltage to the electrode pair 12. The voltage output by the voltage conversion circuit 132 can be adjusted by the pulse width modulation signal, and different voltage requirements of the electrochromic device 10 can be met by one power supply.
In some embodiments, the driving module 13 includes a control unit 134 and a switching circuit 136, and the switching circuit 136 connects the voltage converting circuit 132, the control unit 134, and the electrode pair 12. The control unit 134 is used to control the switching circuit 136 to control the direction of applying voltage to the electrode pair 12, to short the electrode pair 12, or to disconnect the electrode pair 12.
Further, the switching circuit 136 includes a first switching tube connected to the voltage converting circuit 132, the control unit 134 and the first electrode 122; a second switching tube 1364 connecting the first electrode 122, the control unit 134 and ground; a third switching tube 1366 connecting the voltage conversion circuit 132, the control unit 134, and the second electrode 124; and a fourth switching tube 1368 connected to the second electrode 124, the control unit 134 and ground.
In this way, the switch circuit 136 may be an H-bridge circuit formed by four switch tubes, wherein the control unit 134 may be connected to the base of each switch tube to control the switch tubes to be turned on or off.
Specifically, the control unit 134 may be configured to control the first switching tube 1362 and the fourth switching tube 1368 to be turned on, and the second switching tube 1364 and the third switching tube 1366 to be turned off to apply the first voltage to the electrode pair 12, at this time, the first electrode 122 is connected to the voltage converting circuit 132, the second electrode 124 is grounded, and the first voltage applied to the electrode pair 12 may be a forward voltage. The electrochromic material 11 is colored under the action of a first voltage.
The control unit 134 may be configured to control the second switching tube 1364 and the third switching tube 1366 to be turned on, and the first switching tube 1362 and the fourth switching tube 1368 to be turned off to apply the second voltage to the electrode pair 12, at this time, the first electrode 122 is grounded, the second electrode 124 is connected to the voltage converting circuit 132, and the first voltage applied to the electrode pair 12 is a reverse voltage of the first voltage. The electrochromic material 11 can achieve fast fading under the second voltage.
The control unit 134 may be configured to control the second switching tube 1364 and the fourth switching tube 1368 to be turned on, and the first switching tube 1362 and the third switching tube 1366 are turned off to short-circuit the electrode pair 12, at this time, both the first electrode 122 and the second electrode 124 are grounded, the electrode pair 12 is short-circuited, and charges inside the electrochromic material 11 are neutralized, so that the transmittance of the electrochromic material 11 reaches a set value.
The control unit 134 can also be used to control the first switch tube 1362, the second switch tube 1364, the third switch tube 1366, and the fourth switch tube 1368 to open so as to disconnect the electrode pair 12, at this time, the first electrode 122 and the second electrode 124 are not connected to the circuit, and the transmittance of the electrochromic material 11 can be maintained at a set value.
In some embodiments, the control unit 134 may be a micro control unit 134 (MCU).
In this manner, the micro-control unit 134 may be integrated into the electrochromic device 10 for controlling the state of the various switching tubes in the switching circuit 136.
Specifically, steps S12 and S14 may be implemented by the control unit 134. The control unit 134 may control the switching tube to be turned on and off according to the voltage detected by the voltage sensor 15, thereby intermittently applying the first voltage to the electrode pair 12.
The electronic device 100 of the embodiment of the present invention includes an electrochromic device 10, a processor 20, a memory 30, and a computer program stored on the memory 30 and executable on the processor 20. The processor 20 may implement the control method of any of the above embodiments when executing the program.
In one example, the processor 20, when executing the program, may implement the following steps:
a step S10 of applying a first voltage to the electrode pair 12 to color the electrochromic material 11;
step S20, applying a second voltage to the pair of electrodes 12 after the electrochromic material 11 is colored to discolor the electrochromic material 11; and
step S30, after applying the second voltage to the electrode pair 12 for the first duration, short-circuiting the electrode pair 12 for a second duration to bring the transmittance of the electrochromic material 11 to the set value.
Wherein the second voltage is opposite in polarity to the first voltage.
In the electronic device 100 according to the embodiment of the present invention, the processor 20 executes a program to apply a reverse voltage to the electrochromic material 11 to rapidly change the color of the electrochromic material 11 when the electrochromic material 11 fades, and then short-circuits the electrochromic material 11 after a certain period of time, so that the electrochromic material 11 achieves a certain transmittance, thereby preventing the electrochromic material 11 from being repeatedly colored while ensuring that the electrochromic material 11 achieves rapid color change.
In some embodiments, the electronic device 100 may be a cell phone, a tablet, a laptop, a smart band, a wearable device, or the like. In the illustrated embodiment, the electronic device 100 is a cell phone.
Specifically, the electronic device 100 may use a transparent case, for example, a glass rear cover or a ceramic rear cover, or the like. The electrochromic device 10 may be disposed on a transparent housing, and the electronic components within the transparent housing may be shielded or displayed by controlling the transmittance of the electrochromic device 10. Of course, the electronic apparatus 100 may also be provided with a decoration, for example, a decoration film, and the electrochromic device 10 may be used to shield or display the decoration film so that the appearance of the electronic apparatus 100 may be changed according to the electrochromic state. A diversified design of the external appearance of the electronic apparatus 100 is achieved.
The storage medium of the embodiment of the present invention stores a computer program, and the program realizes the control method of any one of the above embodiments when executed by the processor 20.
In the description herein, references to the description of "one embodiment," "some embodiments," or "an example" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.
Claims (10)
1. A control method of an electrochromic device, characterized in that the control method comprises:
applying a first voltage to an electrochromic material to color the electrochromic material;
applying a second voltage to the electrochromic material after the electrochromic material is colored to discolor the electrochromic material, the second voltage being opposite in polarity to the first voltage; and
after the second voltage is applied to the electrochromic material for the first time period, short-circuiting the electrochromic material for a second time period to enable the transmittance of the electrochromic material to be higher than a set value;
the first time period is determined by the time taken for the electrochromic material to fade from a minimum transmittance to a maximum transmittance under the second voltage when the second voltage is applied;
the control method comprises the following steps:
applying a first voltage to the electrochromic layer when the voltage on two sides of the electrochromic layer is less than a first preset voltage; and
when the voltage on the two sides of the electrochromic material reaches a second preset voltage, the electrochromic material is disconnected so that the voltage on the two sides of the electrochromic material is kept between the first preset voltage and the second preset voltage, and further, the voltage is discontinuously applied to the electrochromic material and the static consumption of the electrochromic material is reduced;
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.
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, characterized by comprising:
determining the first and second durations based on a temperature of the electrochromic material, the temperature of the electrochromic material being inversely related to the first and second durations.
4. An electrochromic device, comprising:
an electrochromic material;
a pair of electrodes electrically connected to the electrochromic material; and
a driving module connected to the pair of electrodes, the driving module configured to apply a first voltage to the pair of electrodes to color the electrochromic material and to apply a second voltage to the pair of electrodes after the electrochromic material is colored to discolor the electrochromic material, the second voltage having a polarity opposite to that of the first voltage, the driving module further configured to short the pair of electrodes for a second duration after applying the second voltage to the pair of electrodes for a first duration to cause the transmittance of the electrochromic material to be higher than a set value;
the first time period is determined by the time taken for the electrochromic material to fade from a minimum transmittance to a maximum transmittance under the second voltage when the second voltage is applied;
the electrochromic device comprises a voltage sensor for detecting a voltage between the pair of electrodes;
the driving module is used for applying a first voltage to the electrode pair when the voltage between the electrode pair is smaller than a first preset voltage and disconnecting the electrode pair when the voltage between the electrode pair reaches a second preset voltage so as to keep the voltage on two sides of the electrochromic material between the first preset voltage and the second preset voltage, and further intermittently applying the voltage to the electrochromic material and reducing the static consumption of the electrochromic material;
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.
5. The electrochromic device according to claim 4, characterized in that it comprises a temperature sensor for detecting the temperature of the electrochromic material;
the driving module is used for determining the first time length and the second time length according to the temperature of the electrochromic material, and the temperature of the electrochromic material is inversely related to the first time length and the second time length.
6. The electrochromic device according to claim 4, wherein the driving module comprises a voltage conversion circuit connected to the pair of electrodes and configured to provide the pair of electrodes with the first voltage and the second voltage.
7. The electrochromic device according to claim 6, wherein the driving module comprises a control unit and a switching circuit, the switching circuit connecting the voltage conversion circuit, the control unit and the electrode pair;
the control unit is used for controlling the switch circuit to control the polarity of voltage applied to the electrode pair, short the electrode pair or disconnect the electrode pair.
8. The electrochromic device according to claim 7, wherein the pair of electrodes comprises a first electrode and a second electrode respectively disposed on both sides of the electrochromic material;
the switching circuit includes:
the first switching tube is connected with the voltage conversion circuit, the control unit and the first electrode;
the second switching tube is connected with the first electrode, the control unit and the ground;
a third switching tube connected to the voltage conversion circuit, the control unit and the second electrode; and
a fourth switching tube connected with the second electrode, the control unit and the ground;
the control unit is used for controlling the first switch tube and the fourth switch tube to be conducted, the second switch tube and the third switch tube are disconnected to apply a first voltage to the electrode pair and used for controlling the second switch tube and the third switch tube to be conducted, the first switch tube and the fourth switch tube are disconnected to apply a second voltage to the electrode pair and used for controlling the second switch tube and the fourth switch tube to be conducted, and the first switch tube and the third switch tube are disconnected to short-circuit the electrode pair and used for controlling the first switch tube, the second switch tube, the third switch tube and the fourth switch tube to be disconnected to disconnect the electrode pair.
9. An electronic device, comprising: electrochromic device, processor, memory and computer program stored on the memory and executable on the processor, which when executing the computer program implements a control method according to any one of claims 1-3.
10. A storage medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the control method according to any one of claims 1-3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910472454.1A CN110032019B (en) | 2019-05-31 | 2019-05-31 | Electrochromic device, control method thereof, electronic apparatus, and storage medium |
| PCT/CN2020/087175 WO2020238524A1 (en) | 2019-05-31 | 2020-04-27 | Electrochromic device and control method therefor, electronic apparatus and storage medium |
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| CN201910472454.1A CN110032019B (en) | 2019-05-31 | 2019-05-31 | Electrochromic device, control method thereof, electronic apparatus, and storage medium |
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| CN110032019A CN110032019A (en) | 2019-07-19 |
| CN110032019B true CN110032019B (en) | 2022-03-22 |
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| CN110032019B (en) * | 2019-05-31 | 2022-03-22 | Oppo广东移动通信有限公司 | Electrochromic device, control method thereof, electronic apparatus, and storage medium |
| CN110376818A (en) * | 2019-07-23 | 2019-10-25 | Oppo广东移动通信有限公司 | Electrochromic device and its control method, electronic equipment and storage medium |
| CN114265254B (en) * | 2019-12-17 | 2023-10-20 | 深圳市光羿科技有限公司 | Control method, device, equipment and storage medium of electrochromic device |
| CN113156730B (en) * | 2020-01-23 | 2022-07-19 | 青岛凯欧斯光电科技有限公司 | Method for controlling electrochromic device |
| CN111933091B (en) * | 2020-08-27 | 2022-06-21 | 努比亚技术有限公司 | Electrochromic film drive circuit |
| CN114167658A (en) * | 2020-09-11 | 2022-03-11 | Oppo广东移动通信有限公司 | Control method, control device and electronic equipment |
| CN114624936A (en) * | 2020-12-10 | 2022-06-14 | 北京小米移动软件有限公司 | Mobile terminal |
| CN114690506B (en) * | 2020-12-31 | 2023-08-25 | Oppo广东移动通信有限公司 | Control method, electronic device, and computer-readable storage medium |
| CN114860001A (en) * | 2021-01-19 | 2022-08-05 | Oppo广东移动通信有限公司 | Control method, electronic device, and computer-readable storage medium |
| CN114822445A (en) * | 2021-01-21 | 2022-07-29 | 北京小米移动软件有限公司 | Information prompting method and device and electronic equipment |
| CN112882305B (en) * | 2021-02-10 | 2023-03-03 | Oppo广东移动通信有限公司 | Control method, electronic device, and computer-readable storage medium |
| CN115185131A (en) * | 2021-04-06 | 2022-10-14 | Oppo广东移动通信有限公司 | Control method, electronic device, and computer-readable storage medium |
| CN115167053A (en) * | 2021-04-07 | 2022-10-11 | Oppo广东移动通信有限公司 | Control method, electronic device, and computer-readable storage medium |
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| US7173750B2 (en) * | 2005-07-01 | 2007-02-06 | Ppg Industries Ohio, Inc. | Electrochromic vision panel having a plurality of connectors |
| EP2165238A4 (en) * | 2007-06-01 | 2011-04-06 | Chromogenics Ab | Control of electrochromic device |
| CN201484293U (en) * | 2009-08-14 | 2010-05-26 | 比亚迪股份有限公司 | Electrochromic automobile rearview mirror |
| TW201341928A (en) * | 2012-12-14 | 2013-10-16 | Tintable Smart Material Co Ltd | Method for controlling coloration and bleach of electrochromic element |
| WO2016115166A1 (en) * | 2015-01-12 | 2016-07-21 | Kinestral Technologies, Inc. | Driver for electrochromic glass unit |
| TWI581246B (en) * | 2016-05-19 | 2017-05-01 | 財團法人工業技術研究院 | Method for driving electrochromic device and method for determining bleaching voltage |
| CN106940508A (en) * | 2017-05-10 | 2017-07-11 | 浙江上方电子装备有限公司 | A kind of electrochromic device control method |
| CN107908055B (en) * | 2017-11-28 | 2020-11-06 | 中国建筑材料科学研究总院有限公司 | Control method of electrochromic device |
| CN109375446B (en) * | 2018-12-19 | 2021-06-11 | 合肥威迪变色玻璃有限公司 | Voltage control method of electrochromic device |
| CN109521621A (en) * | 2018-12-28 | 2019-03-26 | 五邑大学 | A kind of electrochromic device of structure shoulder to shoulder and its application |
| CN110032019B (en) * | 2019-05-31 | 2022-03-22 | Oppo广东移动通信有限公司 | Electrochromic device, control method thereof, electronic apparatus, and storage medium |
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| CN110032019A (en) | 2019-07-19 |
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