Calibration method and apparatus for electrochromic device, and adjustable optical system
Patent Information
- Application Number
- PCT/CN2026/078052
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-14
- Filing Date
- 2026-02-09
- Publication Date
- 2026-09-17
Smart Images
Figure CN2026078052_17092026_PF_FP_ABST
Abstract
Description
Calibration methods, apparatus and adjustable optical systems for electrochromic devices
[0001] This application claims priority to Chinese Patent Application No. 202510308139.0, filed on March 14, 2025, entitled "Calibration Method, Apparatus and Adjustable Optical System for Electrochromic Devices", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application belongs to the field of electrochromic technology, and particularly relates to a calibration method, apparatus and adjustable optical system for an electrochromic device. Background Technology
[0003] Electrochromic devices (ECDs) are devices made of electrochromic materials whose optical properties (such as transmittance, reflectance, and color) are tunable. Specifically, the electrochromic material in an ECD undergoes a reversible redox reaction under the influence of an applied electric field, resulting in stable and reversible changes in the device's optical properties. Therefore, the optical properties of the device can be adjusted by applying different voltages.
[0004] However, due to the influence of the device manufacturing process, there is a difference between the actual and theoretical limit capacitance of each electrochromic device. This leads to inconsistencies between the actual and theoretical transmittance of the electrochromic device at different dimming levels when using preset control parameters determined based on the theoretical limit capacitance, which are mismatched with the actual operating conditions of the electrochromic device. This not only shortens the device's cycle life but also affects its dimming effect. Therefore, to ensure consistency between the actual and theoretical transmittance of each electrochromic device at different dimming levels, a calibration method for electrochromic devices has been provided. However, this calibration method has low accuracy, making it difficult to maintain consistency between the actual and theoretical transmittance of the electrochromic device at different dimming levels. Summary of the Invention
[0005] In view of this, embodiments of this application provide a calibration method, apparatus and adjustable optical system for an electrochromic device to solve the technical problem that the calibration accuracy of existing calibration methods is low, which makes it difficult to keep the actual transmittance of the electrochromic device consistent with the theoretical transmittance at various dimming levels.
[0006] In a first aspect, embodiments of this application provide a calibration method for an electrochromic device, comprising:
[0007] Upon receiving a calibration command, the current temperature of the electrochromic device to be calibrated is obtained, and a calibration procedure is executed, which includes:
[0008] Adjust the electrochromic device to a preset dimming level;
[0009] Based on the preset charge corresponding to the target temperature, the electrochromic device is controlled to switch from the preset dimming level to the target dimming level, and the actual open-circuit voltage value of the electrochromic device when it is in the target dimming level at the current temperature is obtained;
[0010] The calibration coefficient is determined based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature.
[0011] The first correspondence between the open-circuit voltage and the electrical charge of the electrochromic device is calibrated according to the calibration coefficient to obtain the second correspondence between the calibrated open-circuit voltage and the electrical charge.
[0012] In one optional implementation of the first aspect, the calibration coefficient is determined based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature, including:
[0013] Based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value, determine the open-circuit voltage offset at the current temperature;
[0014] The calibration coefficient is determined based on the open-circuit voltage offset and the second theoretical open-circuit voltage value.
[0015] In one optional implementation of the first aspect, determining the open-circuit voltage offset at the current temperature based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value includes:
[0016] The difference between the actual open-circuit voltage value and the first theoretical open-circuit voltage value is determined as the open-circuit voltage offset at the current temperature.
[0017] In one alternative implementation of the first aspect, determining the calibration coefficient based on the open-circuit voltage offset and the second theoretical open-circuit voltage value includes:
[0018] The calibration coefficient is determined using the following formula:
[0019] K=OCV 第二理论 / (OCV) 第二理论 +OCV 偏移量 );
[0020] Where K is the calibration coefficient, OCV 偏移量 For the open-circuit voltage offset, OCV 第二理论 This is the second theoretical open-circuit voltage value.
[0021] In one alternative implementation of the first aspect, the calibration process includes:
[0022] If the current temperature is within a preset temperature range, the calibration process is performed.
[0023] In one optional implementation of the first aspect, the preset dimming level is the dimming level corresponding to when the electrochromic device is in a stable state.
[0024] In one alternative implementation of the first aspect, the preset charge is determined based on the preset dimming level and the theoretical limiting capacitance of the electrochromic device at the target temperature.
[0025] Secondly, embodiments of this application provide a calibration device for an electrochromic device, comprising: a sampler, a memory, a processor, and a controller; the sampler includes a temperature detector;
[0026] The temperature detector is used to detect the temperature of the electrochromic device;
[0027] The memory is used to store the correspondence between the open-circuit voltage value and the electrical charge of the electrochromic device;
[0028] The processor, connected to the temperature detector, is used to obtain the current temperature of the electrochromic device to be calibrated upon receiving a calibration command, and to execute a calibration process, the calibration process including:
[0029] The controller is instructed to adjust the electrochromic device to a preset dimming level;
[0030] Based on the preset charge corresponding to the target temperature, the electrochromic device is controlled to switch from the preset dimming level to the target dimming level, and the actual open-circuit voltage value of the electrochromic device when it is in the target dimming level at the current temperature is obtained;
[0031] The calibration coefficient is determined based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature.
[0032] The first correspondence between the open-circuit voltage and the electrical charge of the electrochromic device is calibrated according to the calibration coefficient to obtain the second correspondence between the calibrated open-circuit voltage and the electrical charge.
[0033] Thirdly, embodiments of this application provide an adjustable optical system, including a calibration device for an electrochromic device as described in the second aspect above, and one or more electrochromic devices.
[0034] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the calibration method for an electrochromic device as described in any optional implementation of the first aspect above.
[0035] The calibration method, apparatus, adjustable optical system, and computer-readable storage medium for the electrochromic device provided in the embodiments of this application have the following advantages:
[0036] The calibration method for electrochromic devices provided in this application improves the accuracy of the determined calibration coefficients by comprehensively considering the current temperature when testing the actual open-circuit voltage value and the target temperature when testing the second theoretical voltage value corresponding to the target dimming level. This improves the calibration accuracy of the electrochromic device. Thus, by calibrating the first correspondence between the open-circuit voltage value and the electrical charge of the electrochromic device based on the highly accurate calibration coefficients, and by controlling the dimming of the electrochromic device based on the second correspondence between the calibrated open-circuit voltage value and the electrical charge, the consistency between the actual and theoretical transmittance of the electrochromic device at various dimming levels can be improved, as well as the consistency of transmittance of various electrochromic devices produced in the same batch at the same dimming level. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0038] Figure 1 is a schematic diagram of the structure of a calibration device for an electrochromic device provided in an embodiment of this application;
[0039] Figure 2 is a schematic diagram of an adjustable optical system provided in an embodiment of this application;
[0040] Figure 3 is a suitability flowchart of a calibration method for an electrochromic device provided in an embodiment of this application;
[0041] Figure 4 is a schematic diagram of the specific implementation process of S304 in the calibration method of an electrochromic device provided in an embodiment of this application. Embodiments of the present invention
[0042] The following embodiments are only used to illustrate the technical solutions of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.
[0043] In the description of the embodiments of this application, the technical terms "comprising," "including," "having," and any variations thereof all mean "including but not limited to," unless otherwise specifically emphasized. In the description of the embodiments of this application, unless otherwise stated, the technical term "multiple" refers to two or more, and the technical terms "at least one" or "one or more" refer to one, two, or more than two. The technical terms "first," "second," etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary / secondary relationship of the indicated technical features. The technical term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0044] Electrochromic decives (ECDs) are devices made from electrochromic materials with adjustable optical properties (such as transmittance, reflectance, and color). They are widely used in displays, light modulation, and energy conservation, and are particularly valuable in devices such as smart windows, displays, and mirrors. In practical applications, to facilitate the adjustment of the optical characteristics of ECDs, related technologies pre-configure multiple dimming levels based on the device's transmittance. Each dimming level corresponds to a transmittance of the ECD and also to an open circuit voltage (OCV) value. There is a specific relationship between the dimming level and the OCV value, and this relationship varies at different temperatures. The OCV value refers to the voltage between the two leads of the ECD (the two electrodes used to connect to an external power source). Furthermore, there is a certain correspondence between the OCV value of an electrochromic device and the amount of charge (i.e., the amount of charge stored in the electrochromic device). For example, the correspondence between the OCV value of an electrochromic device and the amount of charge can be expressed by a first function Q=ax. 3 +bx 2 The expression is +cx+d. Here, Q represents the charge of the electrochromic device, x represents the OCV value of the electrochromic device, and a, b, c, and d are constants. The values of a, b, c, and d are usually different at different temperatures, meaning the correspondence between the OCV value and the charge of the electrochromic device differs at different temperatures.
[0045] Based on this, when it is necessary to switch the dimming level of the electrochromic device, the target OCV value x2 corresponding to the target dimming level can be determined according to the correspondence between the dimming level of the electrochromic device and the OCV value. Then, according to the first function mentioned above, the current charge Q1 corresponding to the current OCV value x1 and the target charge Q2 corresponding to the target OCV value x2 are determined. The difference Q2-Q1 between the target charge Q2 and the current charge Q1 is determined as the charge or discharge amount of the electrochromic device. By charging the electrochromic device with the charge amount or controlling it to release the discharge amount, the electrochromic device can be switched from the current dimming level to the target dimming level, thereby achieving the adjustment of the optical characteristics of the electrochromic device, i.e., realizing the dimming control of the electrochromic device.
[0046] However, due to the influence of the device manufacturing process, there is a difference between the actual limit capacitance and the theoretical limit capacitance of electrochromic devices. Furthermore, the actual limit capacitance of different electrochromic devices produced in the same batch also varies. This results in the actual transmittance of electrochromic devices at different dimming levels being inconsistent with the theoretical transmittance when using the same preset control parameters (i.e., control parameters determined based on the theoretical limit capacitance) to dim the electrochromic devices. Moreover, the actual transmittance of different electrochromic devices produced in the same batch is also inconsistent at the same dimming level. Thus, using control parameters that do not match the actual operating conditions of electrochromic devices to dim them will not only shorten the cycle life of the electrochromic devices but also affect their dimming effect.
[0047] Based on this, in order to ensure that the actual transmittance of the electrochromic device remains consistent with the theoretical transmittance at various dimming levels, and to ensure that the actual transmittance of various electrochromic devices produced in the same batch remains consistent at the same dimming level, one embodiment provides a calibration method for electrochromic devices. This calibration method detects the actual OCV value of the electrochromic device at a target dimming level, uses the ratio of the theoretical OCV value corresponding to the target dimming level to the actual OCV value as a calibration coefficient, calibrates the correspondence between the OCV value and the electrical charge of the electrochromic device pre-configured in the memory, and performs dimming control on the electrochromic device based on the calibrated correspondence between the OCV value and the electrical charge. This can reduce the difference between the actual transmittance and the theoretical transmittance of the electrochromic device at various dimming levels, and reduce the difference in the actual transmittance of various electrochromic devices produced in the same batch at the same dimming level.
[0048] However, the OCV value of electrochromic devices is quite sensitive to temperature, and the OCV value corresponding to the same dimming level varies significantly at different temperatures. Therefore, in order to improve the calibration accuracy of electrochromic devices, the measurement temperature of the actual OCV value corresponding to the target dimming level needs to be consistent with the measurement temperature of the theoretical OCV value. However, in practical applications, it is difficult to ensure that the actual OCV value corresponding to the target dimming level and the theoretical OCV value are measured at the same temperature, resulting in low accuracy of the calibration coefficient determined by this calibration method. Thus, even if the correspondence between the calibrated OCV value and the amount of electricity is used to control the dimming of the electrochromic device, it is still difficult to ensure that the actual transmittance of the electrochromic device at each dimming level is consistent with the theoretical transmittance, and it is also difficult to ensure that the actual transmittance of various electrochromic devices produced in the same batch is consistent at the same dimming level.
[0049] In view of this, this application first provides a calibration device for an electrochromic device. Exemplarily, FIG1 is a schematic structural diagram of a calibration device for an electrochromic device provided in this application. As shown in FIG1, the calibration device 10 for the electrochromic device may include a sampler 101, a memory 102, a processor 103, and a controller 104. The processor 103 may be connected to the sampler 101, the memory 102, and the controller 104, and the controller 104 may also be connected to the electrochromic device 20 to be calibrated.
[0050] Optionally, the components of the calibration device 10 can be integrated on a printed circuit board (PCB).
[0051] In one specific implementation, the sampler 101 may include a temperature detector 1011, a voltage detector 1012, and a power detector 1013, etc.
[0052] The temperature detector 1011 is used to detect the temperature of the electrochromic device 20.
[0053] For example, the temperature detector 1011 can be implemented using a thermistor, a resistance temperature detector (RDT), or a digital temperature sensor. The thermistor can be, for example, a negative temperature coefficient (NTC) thermistor or a positive temperature coefficient (NTC) thermistor.
[0054] Voltage detector 1012 is used to detect the OCV value of electrochromic devices at various dimming levels.
[0055] For example, the voltage detector 1012 can be a voltmeter or a voltage sensor, etc. Optionally, to improve the detection accuracy of the OCV value, the voltage detector 1012 can be a high-precision voltmeter or a voltage sensor, etc. Specifically, the voltage detector 1012 can be implemented by a voltage detection circuit. For example, the voltage detection circuit can include a differential amplifier and an analog-to-digital converter (ADC). The two differential input terminals of the differential amplifier can be connected to the two leads of the electrochromic device 20, respectively, and the output terminal of the differential amplifier can be connected to the input terminal of the ADC. This is used to sample the voltage between the two leads of the electrochromic device 20 to obtain an analog voltage signal, and then differentially amplify the analog voltage signal. The ADC can be used to convert the differentially amplified analog voltage signal into a digital voltage signal, thereby obtaining the OCV value of the electrochromic device 20, thus ensuring that the acquired OCV value accurately reflects the current state of the electrochromic device 20.
[0056] The power detector 1013 can be used to detect the amount of charge or discharge of the electrochromic device 20.
[0057] For example, the charge detector 1013 can be implemented by an integrator. The integrator can integrate the current flowing through the electrochromic device to obtain the charge or discharge amount of the electrochromic device 20.
[0058] Optionally, the memory 102 can be used to store the correspondence between the dimming level of the electrochromic device 20 and its OCV value. Optionally, the memory 102 can also be used to store the correspondence between the OCV value of the electrochromic device 20 and its electrical charge. Optionally, the memory 102 can also be used to store the correspondence between the temperature of the electrochromic device 20 and its theoretical open-circuit voltage value.
[0059] It should be noted that the correspondence between OCV values and electrical charge stored in memory 102 can be updated. For example, when calibrating an electrochromic device, the first correspondence between OCV values and electrical charge pre-stored in memory 102 can be updated using the calibrated correspondence between OCV values and electrical charge. This allows processor 103 and controller 104 to perform dimming control on the electrochromic device 20 based on the latest and most accurate correspondence between OCV values and electrical charge, thereby improving the accuracy of dimming control. In practical applications, the first correspondence between OCV values and electrical charge pre-stored in memory 102 can be a theoretical correspondence between OCV values and electrical charge obtained by testing multiple sample electrochromic devices of the same specifications (e.g., produced in the same batch). This theoretical correspondence can be written into memory 102 before the electrochromic device leaves the factory. For example, the first correspondence between OCV values and electrical charge can be expressed using a first function Q=ax. 3 +bx 2 +cx+d represents the charge of the electrochromic device 20, x represents the OCV value of the electrochromic device 20, and a, b, c, and d are constants.
[0060] For example, the correspondence between the temperature of the stored electrochromic device 20 and the theoretical open-circuit voltage value can be expressed by the second function OCV. 理论 =eT 3 + fT 2 + gT + h represents this. Where OCV 理论 The theoretical open-circuit voltage (OCV) of the electrochromic device at the target dimming level under the current or target temperature is the theoretical OCV of the electrochromic device after being charged with a preset amount of electricity at the current or target temperature. T is the current temperature, i.e., the temperature measured by the NTC. e, f, g, and h are constants.
[0061] For example, memory 102 can be implemented using non-volatile memory. Non-volatile memory may include erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory, etc.
[0062] Optionally, the processor 103 integrates a dimming control algorithm. Based on this dimming control algorithm, when receiving a level switching command, the processor 103 obtains the current actual OCV value x1 corresponding to the current dimming level through the voltage detector 1012, determines the target theoretical OCV value x2 corresponding to the target dimming level according to the correspondence between the dimming level and OCV value of the electrochromic device 20 stored in the memory 102, and determines the current power Q1 corresponding to the current actual OCV value x1 and the target power Q2 corresponding to the target theoretical OCV value x2 according to the correspondence between the OCV value and the power stored in the memory 102. The difference Q2-Q1 between the target power Q2 and the current power Q1 is determined as the amount to be charged or discharged of the electrochromic device, and the amount to be charged or discharged is sent to the controller 104. The controller 104 can control the charging circuit to charge the electrochromic device 20 with the amount of charge to be applied or control the electrochromic device 20 to release the amount of discharge to be applied, so as to switch the electrochromic device 20 from the current dimming level to the target dimming level, thereby realizing the dimming control of the electrochromic device 20.
[0063] Optionally, the processor 103 also integrates a calibration algorithm. Based on this calibration algorithm, upon receiving a calibration command, the processor 103 can obtain the current temperature of the electrochromic device to be calibrated and execute the following calibration process: instructing the controller 104 to adjust the electrochromic device to a preset dimming level, and controlling the electrochromic device to switch from the preset dimming level to the target dimming level based on the preset charge corresponding to the target temperature; obtaining the actual open-circuit voltage value of the electrochromic device at the target dimming level at the current temperature; and based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature... The calibration coefficient is determined by the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature. The first correspondence between the open-circuit voltage value and the charge of the electrochromic device is calibrated according to the calibration coefficient to obtain the second correspondence between the calibrated open-circuit voltage value and the charge. The first correspondence stored in the memory 102 is updated through the second correspondence so that the dimming control of the electrochromic device can be performed based on the second correspondence that is more in line with the actual working conditions of the electrochromic device, thereby improving the consistency between the actual transmittance and the theoretical transmittance of the electrochromic device at each dimming level.
[0064] It should be noted that the specific implementation details of the above calibration process can be found in the relevant descriptions in the subsequent method embodiments, and will not be elaborated here.
[0065] For example, the processor 103 can be implemented by a micro-controller unit (MCU) or a digital signal processor (DSP).
[0066] For example, the controller 104 can be implemented through a power management unit (PMU) and a power controller. Specifically, the PMU and the power controller can use pulse width modulation (PWM) to control the output of the power supply, thereby adjusting the current flowing through the electrochromic device or the voltage applied to the electrochromic device. Furthermore, based on the real-time charge of the electrochromic device, closed-loop feedback technology can be used to adjust the charging and discharging rate or charging and discharging time of the electrochromic device, thereby achieving precise dimming control of the electrochromic device.
[0067] This application also provides an adjustable optical system. Exemplarily, FIG2 is a schematic diagram of the structure of an adjustable optical system provided in this application embodiment. As shown in FIG2, the adjustable optical system includes an electrochromic device 20 and a calibration device 10 for the electrochromic device 20. The calibration device 10 is connected to the electrochromic device 20 and is used to calibrate the correspondence between the OCV value and the electrical charge of the electrochromic device 20. In practical applications, the number of electrochromic devices 20 can be one or more.
[0068] Optionally, when there is only one electrochromic device 20, the calibration device 10 calibrates the correspondence between the OCV value and the electrical charge of the electrochromic device 20, so that the calibrated correspondence between the OCV value and the electrical charge is adapted to the electrochromic device 20. In this way, by using the calibrated correspondence between the OCV value and the electrical charge to control the dimming of the electrochromic device 20, the actual transmittance of the electrochromic device 20 at each dimming level can be kept consistent with the theoretical transmittance.
[0069] Optionally, when there are multiple electrochromic devices 20, the calibration device 10 calibrates the correspondence between the OCV value and the electrical charge of each electrochromic device 20, ensuring that the calibrated correspondence between each OCV value and the electrical charge is adapted to the corresponding electrochromic device 20. In this way, by using the calibrated correspondence between each OCV value and the electrical charge to control the dimming of each electrochromic device 20, not only can the actual transmittance of each electrochromic device 20 at each dimming level remain consistent with the theoretical transmittance, but the transmittance of each electrochromic device 20 at the same dimming level can also remain consistent, thereby improving the consistency among the various electrochromic devices 20.
[0070] It should be noted that the calibration device 10 in the adjustable optical system can be the calibration device 10 in the embodiment corresponding to FIG1. Therefore, for details about the calibration device 10, its structure and working principle, please refer to the relevant description in the embodiment corresponding to FIG1, which will not be repeated here.
[0071] This application also provides a calibration method for an electrochromic device, wherein the entity executing the calibration method may be the calibration device 10 for the electrochromic device in the above embodiments. For example, Figure 3 is a schematic flowchart of a calibration method for an electrochromic device provided in this application. As shown in Figure 3, the calibration method may include steps S301 to S305, detailed below:
[0072] S301, upon receiving a calibration command, obtains the current temperature of the electrochromic device to be calibrated and executes the calibration process.
[0073] In practical applications, the electrochromic device to be calibrated can be any one or more electrochromic devices that require calibration of the correspondence between OCV values and electrical quantities. Before calibrating the electrochromic device to be calibrated, it can be connected to the calibration device 10.
[0074] In one optional implementation, the calibration device 10 may be equipped with a preset control button. This preset calibration button can be connected to the processor 103 within the calibration device 10, allowing the user to trigger a calibration command. That is, the user can issue a calibration command to the calibration device 10 by triggering the preset control button. Based on this, the processor 103 can determine that a calibration command has been received and obtain the current temperature of the electrochromic device to be calibrated when the preset control button is detected to be triggered. Exemplarily, the preset control button can be a physical button or a virtual button, etc. This application embodiment does not limit the type of preset control button.
[0075] In another alternative implementation, the calibration device 10 can establish a communication connection (e.g., a wireless communication connection) with a terminal device such as a mobile phone or tablet, allowing the user to issue calibration commands to the calibration device 10 via the terminal device. Based on this, the processor 103 in the calibration device 10 can obtain the current temperature of the electrochromic device to be calibrated upon receiving a calibration command from the terminal device.
[0076] In another alternative implementation, the calibration command may also originate from within the calibration device 10. For example, the processor 103 actively issues a calibration command to instruct calibration by determining the difference between the actual transmittance and the theoretical transmittance at a specific setting.
[0077] In practical applications, electrochromic devices can be calibrated at any time after they are manufactured. For example, they can be calibrated after manufacturing but before leaving the factory; or after leaving the factory but before being used; or during initial setup; or after being used for a period of time; or after prolonged use and aging. This application does not limit the timing of the calibration (i.e., the timing when the calibration device 10 receives the calibration command).
[0078] In one specific implementation, the processor 103 can obtain the current temperature of the electrochromic device to be calibrated, as detected by the temperature detector 1011.
[0079] In one alternative implementation, after the processor 103 obtains the current temperature of the electrochromic device to be calibrated, it can directly execute the calibration procedure. The calibration procedure may include subsequent steps S302 to S305.
[0080] In another optional implementation, since the electrochromic device operates within a specific temperature range—that is, it can function normally within that range but typically cannot function normally outside it—the processor 103, after obtaining the current temperature of the electrochromic device to be calibrated, can determine whether the current temperature is within a preset temperature range. Optionally, if the current temperature is within the preset temperature range, the processor 103 executes the calibration process. Optionally, if the current temperature is outside the preset temperature range, the processor 103 does not execute the calibration process. The preset temperature range can be any temperature range within the operating temperature range of the electrochromic device. For example, if the operating temperature range of the electrochromic device is -20 degrees Celsius (°C) to 85°C, the preset temperature range can be -20°C to 85°C, or it can be 0°C to 45°C, or it can be any other temperature range within the range of -20°C to 85°C.
[0081] Optionally, the processor 103 may not perform the calibration process if it does not receive a calibration instruction.
[0082] It should be noted that during the calibration process of the electrochromic device, the controller 104 in the calibration device 10 does not perform conventional dimming control on the electrochromic device, but only performs calibration operations on the electrochromic device. After the calibration operation is completed, the controller 102 can perform dimming control on the electrochromic device according to the correspondence between the calibrated OCV value and the electrical charge.
[0083] S302, adjust the electrochromic device to the preset dimming level.
[0084] The preset dimming level can be the dimming level corresponding to the stable state of the electrochromic device. The stable state refers to the state that the electrochromic device maintains over a long period of time without the application of external voltage (i.e., current cut off).
[0085] In practical applications, the stable states of electrochromic devices made of different materials may be the same or different. For example, the stable state of some electrochromic devices may be the darkest state with the lowest transmittance (i.e., the least transparent), while the stable state of others may be the brightest state with the highest transmittance (i.e., the most transparent). Still others may be an intermediate state between the darkest and brightest states. Based on this, in practical applications, when the stable state of the electrochromic device is the darkest state, the controller 104 can adjust the electrochromic device to the dimming level corresponding to the darkest state. When the stable state of the electrochromic device is the brightest state, the controller 104 can adjust the electrochromic device to the dimming level corresponding to the brightest state. When the stable state of the electrochromic device is an intermediate state, the controller 104 can adjust the electrochromic device to the dimming level corresponding to the intermediate state.
[0086] For example, the preset dimming level (i.e., the dimming level corresponding to the stable state) can be the lowest dimming level of the electrochromic device. The lowest dimming level can be the dimming level corresponding to the electrochromic device when it is in a fully discharged state (i.e., completely discharged). Based on this, the controller 104 in the calibration device 10 can control the electrochromic device to fully discharge so as to adjust the electrochromic device to the preset dimming level.
[0087] For example, the preset dimming level can be the highest dimming level of the electrochromic device. The highest dimming level can be the dimming level corresponding to the electrochromic device when it is fully charged (i.e., fully charged). Based on this, the controller 104 in the calibration device 10 can control the charging circuit to fully charge the electrochromic device so as to adjust the electrochromic device to the preset dimming level.
[0088] For example, the preset dimming level can be an intermediate dimming level between the lowest and highest dimming levels of the electrochromic device. Based on this, the controller 104 in the calibration device 10 can control the charging circuit to charge the electrochromic device 20, or control the electrochromic device 20 to discharge, so as to adjust the electrochromic device to the preset dimming level.
[0089] In the calibration process of this application embodiment, the electrochromic device is first adjusted to a preset dimming level, and the preset dimming level in a stable state is used as the calibration baseline for the entire calibration process, thereby improving the calibration accuracy of the electrochromic device.
[0090] S303 controls the electrochromic device to switch from a preset dimming level to a target dimming level based on the preset charge corresponding to the target temperature, and obtains the actual open-circuit voltage value of the electrochromic device when it is in the target dimming level at the current temperature.
[0091] The target temperature can be any temperature within a preset temperature range. The preset charge corresponding to the target temperature can be determined based on the preset dimming level and the theoretical limit capacitance of the electrochromic device at the target temperature.
[0092] Optionally, when the preset dimming level is set to the lowest or highest dimming level, the preset charge corresponding to the target temperature can be the theoretical limit capacitance of the electrochromic device at the target temperature, i.e., the theoretical charge corresponding to the electrochromic device when fully charged or fully discharged at the target temperature. For example, assuming the target temperature is room temperature (25℃), the preset charge corresponding to the target temperature can be the theoretical charge corresponding to the electrochromic device when fully charged or fully discharged at room temperature; assuming the target temperature is 35℃, the preset charge corresponding to the target temperature can be the theoretical charge corresponding to the electrochromic device when fully charged or fully discharged at 35℃.
[0093] Based on this, when the preset dimming level is the lowest dimming level, the controller 104 in the calibration device 10 can control the charging circuit to charge the electrochromic device with its theoretical limit capacitance at the target temperature, so as to switch the electrochromic device from the preset dimming level to the target dimming level, at which time the target dimming level is the highest dimming level. When the preset dimming level is the highest dimming level, the controller 104 in the calibration device 10 can control the electrochromic device to release its theoretical limit capacitance at the target temperature, so as to switch the electrochromic device from the preset dimming level to the target dimming level, at which time the highest dimming level is the lowest dimming level.
[0094] Optionally, when the preset dimming level is the middle dimming level, the preset power consumption corresponding to the target temperature can be the difference between the theoretical power consumption of the electrochromic device 20 when it is in the target dimming level and the theoretical power consumption when it is in the preset dimming level at the target temperature.
[0095] Based on this, when the preset dimming level is the intermediate dimming level, the controller 104 in the calibration device 10 can control the charging circuit to charge the electrochromic device 20 with the difference between its theoretical charge when it is in the target dimming level and its theoretical charge when it is in the preset dimming level, or control the electrochromic device 20 to release the difference between its theoretical charge when it is in the target dimming level and its theoretical charge when it is in the preset dimming level, thereby switching the electrochromic device from the preset dimming level to the target dimming level.
[0096] Optionally, to further improve the calibration accuracy of the electrochromic device, after adjusting the electrochromic device to a preset dimming level, it can be left to stand for a first duration until its state stabilizes before switching it to the target dimming level. Alternatively, after adjusting the electrochromic device to the target dimming level, it can be left to stand for a second duration until its state stabilizes before acquiring the actual open-circuit voltage value of the electrochromic device at the target dimming level at the current temperature. That is, after the electrochromic device has been in the preset dimming level for a first duration, the controller 104 can control the electrochromic device to switch from the preset dimming level to the target dimming level based on the preset charge corresponding to the target temperature. The controller 104 can also acquire the actual open-circuit voltage value of the electrochromic device at the target dimming level at the current temperature after the electrochromic device has been in the target dimming level for a second duration.
[0097] It is understandable that an electrochromic device is more stable in a preset dimming setting than in a target dimming setting. Therefore, the required settling time for the electrochromic device at the target dimming setting can be greater than the required settling time at the preset dimming setting; that is, the second settling time can be greater than the first settling time. For example, the first settling time can be 0.5 minutes, and the second settling time can be 1.5 minutes.
[0098] In one specific implementation, the processor 103 in the calibration device 10 can obtain the actual open-circuit voltage value of the electrochromic device when it is in the target dimming position at the current temperature from the voltage detector 1012.
[0099] In one specific implementation, the processor 103 can retrieve the second function OCV from the memory 102. 理论 =eT 3 + fT 2 + gT + h, and based on the current temperature and the second function, calculate the theoretical open-circuit voltage of the electrochromic device at the target dimming level at the current temperature and the theoretical open-circuit voltage of the electrochromic device at the target dimming level at the target temperature. Wherein, OCV 理论This is the theoretical open-circuit voltage value of the electrochromic device when it is in the target dimming position at the current temperature or the target temperature, where T is the current temperature, and e, f, g, and h are constants.
[0100] S304. Determine the calibration coefficient based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature.
[0101] In this embodiment of the application, after switching the electrochromic device from a preset dimming level to a target dimming level, the processor 103 can also determine the first theoretical open-circuit voltage value corresponding to the target dimming level of the electrochromic device at the current temperature and the second theoretical open-circuit voltage value corresponding to the target dimming level of the electrochromic device at the target temperature according to the correspondence between the dimming level and the OCV value at each temperature stored in the memory 102. Then, based on the actual open-circuit voltage value of the electrochromic device at the target dimming level at the current temperature, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature, the calibration coefficient is determined.
[0102] In one specific implementation, S304 may include S3041 to S3042 as shown in Figure 4, as detailed below:
[0103] S3041, determine the open-circuit voltage offset at the current temperature based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value.
[0104] Specifically, the processor 103 in the calibration device 10 can determine the difference between the actual open-circuit voltage value and the first theoretical open-circuit voltage value as the open-circuit voltage offset at the current temperature. For example, the processor 103 can determine the open-circuit voltage offset at the current temperature based on the following formula (1):
[0105] OCV 偏移量 =OCV 实际 -OCV 第一理论 ;Formula (1)
[0106] Among them, OCV 实际 OCV is the actual open-circuit voltage of the electrochromic device when it is in the target dimming position at the current temperature. 第一理论 This is the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature.
[0107] S3042 determines the calibration coefficient based on the open-circuit voltage offset and the second theoretical open-circuit voltage value.
[0108] The processor 103 in the calibration device 10 can determine the calibration coefficient according to the following formula (2):
[0109] K=OCV 第二理论 / (OCV) 第二理论 +OCV 偏移量 ); formula (2)
[0110] Where K is the calibration coefficient, OCV 偏移量 Open-circuit voltage offset, OCV 第二理论 This is the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature.
[0111] In this embodiment of the application, when calculating the calibration coefficient K, the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature is added to the open-circuit voltage offset (i.e., OCV). 第二理论 +OCV 偏移量 The test temperature of the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature can be calibrated to the target temperature, thereby ensuring that the numerator and denominator in the above formula (2) are measured at the same temperature, which improves the accuracy of the determined calibration coefficient.
[0112] S305, calibrate the first correspondence between the open-circuit voltage value and the electrical quantity of the electrochromic device according to the calibration coefficient, and obtain the second correspondence between the open-circuit voltage value and the electrical quantity.
[0113] In one alternative implementation, the processor 103 can determine a second correspondence between the open-circuit voltage value and the electrical quantity by multiplying the calibration coefficient by the first correspondence. For example, assume the first correspondence is determined by the first function Q=ax. 3 +bx 2 +cx+d represents the second correspondence, which can be expressed by the function Q1=K. (x) 3 +bx 2 +cx+d) represents.
[0114] In one optional implementation, after obtaining the calibration coefficient, the processor 103 can determine whether the calibration coefficient is within a preset coefficient range. The preset coefficient range can be set according to actual needs; for example, the preset coefficient range can be 0.9 to 1.1.
[0115] Optionally, if the calibration coefficient is within the preset coefficient range, the processor 103 can calibrate the open-circuit voltage value and the electrical charge of the electrochromic device according to the calibration coefficient, and obtain a second correspondence between the open-circuit voltage value and the electrical charge.
[0116] Optionally, if the calibration coefficient is not within the preset coefficient range, the processor 103 can calibrate the correspondence between the open-circuit voltage and electrical charge of the electrochromic device according to the preset coefficient range. Specifically, if the calibration coefficient is greater than or equal to the upper limit of the preset coefficient range, the processor 103 can calibrate the correspondence between the open-circuit voltage and electrical charge of the electrochromic device according to the upper limit of the preset coefficient range. If the calibration coefficient is less than or equal to the lower limit of the preset coefficient range, the processor 103 can calibrate the correspondence between the open-circuit voltage and electrical charge of the electrochromic device according to the lower limit of the preset coefficient range. For example, assuming the preset coefficient range is 0.9 to 1.1 and the calibration coefficient is 1.2, the processor 103 can use the upper limit of the preset coefficient range, 1.1, to calibrate the correspondence between the open-circuit voltage and electrical charge of the electrochromic device. Assuming the preset coefficient range is 0.9 to 1.1 and the calibration coefficient is 0.7, the processor 103 can use the lower limit of the preset coefficient range, 0.9, to calibrate the correspondence between the open-circuit voltage and electrical charge of the electrochromic device. By limiting the calibration coefficient to a certain range, device performance fluctuations caused by extreme calibration coefficients can be avoided, thereby improving calibration accuracy.
[0117] In this embodiment, after the processor 103 obtains the second correspondence between the OCV value and the electrical charge of the electrochromic device, it can use the second correspondence to update the first correspondence between the OCV value and the electrical charge stored in the memory 102. This allows the calibrated second correspondence to be used for dimming control of the electrochromic device, ensuring that the actual transmittance of the electrochromic device at each dimming level remains consistent with the theoretical transmittance.
[0118] As can be seen from the above, the calibration method for the electrochromic device provided in this application improves the accuracy of the determined calibration coefficient by comprehensively considering the current temperature when testing the actual open-circuit voltage value and the target temperature when testing the second theoretical voltage value corresponding to the target dimming level. This improves the calibration accuracy of the electrochromic device. Thus, by calibrating the first correspondence between the open-circuit voltage value and the charge of the electrochromic device based on the high-accuracy calibration coefficient, and by controlling the dimming of the electrochromic device based on the second correspondence between the calibrated open-circuit voltage value and the charge, the consistency between the actual transmittance and the theoretical transmittance of the electrochromic device at various dimming levels can be improved, as well as the consistency of the transmittance of various electrochromic devices produced in the same batch at the same dimming level.
[0119] It is understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0120] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the various steps in the calibration method for the electrochromic device described above.
[0121] This application provides a computer program product that, when run on a calibration device, causes the calibration device to perform the steps described in the various method embodiments above.
[0122] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.
[0123] It should be noted that, unless otherwise specified, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The technical terms used in the embodiments of this application are only used to explain specific embodiments of this application and are not intended to limit this application.
[0124] The term "embodiment" as used in the description of embodiments in this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0125] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0126] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A calibration method for an electrochromic device, characterized in that, include: Upon receiving a calibration command, the current temperature of the electrochromic device to be calibrated is obtained, and a calibration procedure is executed, which includes: Adjust the electrochromic device to a preset dimming level; Based on the preset charge corresponding to the target temperature, the electrochromic device is controlled to switch from the preset dimming level to the target dimming level, and the actual open-circuit voltage value of the electrochromic device when it is in the target dimming level at the current temperature is obtained; The calibration coefficient is determined based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature. The first correspondence between the open-circuit voltage and the electrical charge of the electrochromic device is calibrated according to the calibration coefficient to obtain the second correspondence between the calibrated open-circuit voltage and the electrical charge.
2. The method according to claim 1, characterized in that, Based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature, the calibration coefficient is determined, including: Based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value, determine the open-circuit voltage offset at the current temperature; The calibration coefficient is determined based on the open-circuit voltage offset and the second theoretical open-circuit voltage value.
3. The method according to claim 2, characterized in that, Based on the actual open-circuit voltage value and the first theoretical open-circuit voltage value, determine the open-circuit voltage offset at the current temperature, including: The difference between the actual open-circuit voltage value and the first theoretical open-circuit voltage value is determined as the open-circuit voltage offset at the current temperature.
4. The method according to claim 2, characterized in that, Based on the open-circuit voltage offset and the second theoretical open-circuit voltage value, a calibration coefficient is determined, including: The calibration coefficient is determined using the following formula: K=OCV 第二理论 / (OCV) 第二理论 +OCV 偏移量 ); Where K is the calibration coefficient, OCV 偏移量 For the open-circuit voltage offset, OCV 第二理论 This is the second theoretical open-circuit voltage value.
5. The method according to any one of claims 1-4, characterized in that, Performing the calibration procedure includes: If the current temperature is within a preset temperature range, the calibration process is performed.
6. The method according to any one of claims 1-4, characterized in that, The preset dimming level is the dimming level corresponding to when the electrochromic device is in a stable state.
7. The method according to any one of claims 1-4, characterized in that, The preset power level is determined based on the preset dimming level and the theoretical limit capacitance of the electrochromic device at the target temperature.
8. A calibration device for an electrochromic device, characterized in that, include: The sampler includes a memory, a processor, and a controller; the sampler includes a temperature detector. The temperature detector is used to detect the temperature of the electrochromic device; The memory is used to store the correspondence between the open-circuit voltage value and the electrical charge of the electrochromic device; The processor, connected to the temperature detector, is used to obtain the current temperature of the electrochromic device to be calibrated upon receiving a calibration command, and to execute a calibration process, the calibration process including: The controller is instructed to adjust the electrochromic device to a preset dimming level; Based on the preset charge corresponding to the target temperature, the electrochromic device is controlled to switch from the preset dimming level to the target dimming level, and the actual open-circuit voltage value of the electrochromic device when it is in the target dimming level at the current temperature is obtained; The calibration coefficient is determined based on the actual open-circuit voltage value, the first theoretical open-circuit voltage value corresponding to the target dimming level at the current temperature, and the second theoretical open-circuit voltage value corresponding to the target dimming level at the target temperature. The first correspondence between the open-circuit voltage and the electrical charge of the electrochromic device is calibrated according to the calibration coefficient to obtain the second correspondence between the calibrated open-circuit voltage and the electrical charge.
9. An adjustable optical system, characterized in that, It includes a calibration device for an electrochromic device as described in claim 8, and one or more electrochromic devices.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the calibration method for the electrochromic device as described in any one of claims 1-7.