Toning driving device of electrochromic device and control method of toning driving device

Abstract

According to the color modulation driving device of the electrochromic device and the control method of the color modulation driving device, the control signal of the upper computer is received through the microprocessor, so that the color modulation of the electrochromic device can be programmed through the upper computer on the expected voltage waveform, and the problem of color modulation control stability of the electrochromic device can be effectively solved; after receiving a control signal of an upper computer, the microprocessor can output a voltage waveform signal and a duty ratio signal according to the control signal, the voltage waveform signal is conducted through the controllable switch unit after being subjected to power amplification through the power amplification unit, and the voltage waveform signal can serve as driving voltage for color change of the electrochromic device; after the duty ratio signal is input into the gate driving unit, the gate driving unit controls the on time and the off time of the controllable switch unit according to the duty ratio signal so as to control the on and off of the driving voltage of the electrochromic device, manual switching of the driving voltage is not needed, and the stability and the efficiency of color modulation of the electrochromic device are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrochromic devices, and in particular, relates to a color adjustment driving device of an electrochromic device and a control method thereof. Background Art

[0002] Electrochromic device is a new type of color-changing device with the advantages of wide viewing angle, wide operating temperature range, low cost, low power consumption, softness, and ultra-thinness. It has broad application prospects in electrochromic windows, car rearview anti-glare mirrors, displays, aerospace, etc.

[0003] The working principle of the electrochromic device is to add a driving power supply to the electrodes at both ends of the device. Under the action of the electric field of the applied voltage, ions flow into (or migrate out of) the electrochromic layer, which reduces (or increases) the number of ions in the electrochromic material. Before reaching equilibrium, the electrochromic material changes color; when equilibrium is reached, the color change of the electrochromic material reaches stability. However, in practical applications, electrochromic devices face the problem of frequent switching of display states. In related technologies, the display state of electrochromic devices is mainly changed by manually switching the driving voltage, which is not only inefficient, but also cannot guarantee the stability of the color change control of the electrochromic device. Summary of the invention

[0004] The embodiments of the present application provide a color adjustment driving device of an electrochromic device and a control method thereof, which can improve the color adjustment efficiency and stability of the electrochromic device.

[0005] In a first aspect, an embodiment of the present application provides a color adjustment driving device for an electrochromic device, comprising:

[0006] Microprocessor, controllable switch unit, power amplifier unit and gate drive unit;

[0007] The first end of the microprocessor is connected to the host computer, the second end of the microprocessor is connected to the first end of the controllable switch unit through the gate driving unit, the third end of the microprocessor is connected to the second end of the controllable switch unit through the power amplification unit, and the third end of the controllable switch unit is connected to the electrochromic device;

[0008] The microprocessor is used to receive a control signal from a host computer, and output a voltage waveform signal and a duty cycle signal based on the control signal;

[0009] The power amplification unit is used to receive the voltage waveform signal and amplify the power of the voltage waveform signal to meet the driving requirements of the electrochromic device;

[0010] The gate driving unit is used to receive the duty cycle signal, and control the on-time and off-time of the second end and the third end of the controllable switch unit through the duty cycle signal.

[0011] In a second aspect, an embodiment of the present application provides a method for controlling a color adjustment driving device of an electrochromic device, the method being applied to the device as described in the first aspect, the method comprising:

[0012] The microprocessor receives a control signal sent by a host computer, and outputs a voltage waveform signal and a duty cycle signal based on the control signal;

[0013] The voltage waveform signal is used to control the polarity, amplitude and slope of the color adjustment driving voltage of the electrochromic device; the duty cycle signal is used to control the on time and off time of the color adjustment driving voltage of the electrochromic device.

[0014] The color adjustment drive device and control method of the electrochromic device of the embodiment of the present application receive the control signal of the host computer through the microprocessor, so that the color adjustment of the electrochromic device can be performed by programming the expected voltage waveform through the host computer, and the amplitude and polarity of the output voltage of the device are adjusted, thereby realizing adjustable control of the number of ions in the electrochromic layer of the electrochromic device, which can effectively solve the problem of color change control stability of the electrochromic device. After receiving the control signal of the host computer, the microprocessor can output a voltage waveform signal and a duty cycle signal according to the control signal. After the voltage waveform signal is power amplified by the power amplifier unit, it is turned on by the controllable switch unit and can be used as the driving voltage for the color change of the electrochromic device; after the duty cycle signal is input to the gate drive unit, the gate drive unit controls the on time and off time of the controllable switch unit according to the duty cycle signal, so as to control the on and off of the driving voltage of the electrochromic device. The output voltage waveform signal and duty cycle signal output by the microprocessor can achieve precise control of the color adjustment voltage of the electrochromic device and realize automatic connection and disconnection of the driving voltage, so that the transparency of the electrochromic device can be maintained in a certain state without manual switching of the driving voltage, thereby improving the stability and efficiency of the color adjustment of the electrochromic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the working principle of color adjustment of an electrochromic device provided by an embodiment of the present application;

[0017] Figure 2 It is a structural schematic diagram of a color adjustment driving device of a first electrochromic device provided by an embodiment of the present application;

[0018] Figure 3 It is a structural schematic diagram of a second color adjustment driving device of an electrochromic device provided in one embodiment of the present application;

[0019] Figure 4 It is a structural schematic diagram of a color adjustment driving device of a third electrochromic device provided in one embodiment of the present application;

[0020] Figure 5 It is a structural schematic diagram of a fourth color adjustment driving device of an electrochromic device provided in one embodiment of the present application;

[0021] Figure 6 is a structural schematic diagram of a fifth color adjustment driving device of an electrochromic device provided in an embodiment of the present application;

[0022] Figure 7 It is a flow chart of a control method of a color adjustment driving device of an electrochromic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0023] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of this application, unless otherwise specified, the term "several" refers to two or more. The term "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0025] refer to Figure 1 , the electrochromic device is generally provided with a transparent conductive layer 022, an electrochromic layer 024, an electrolyte layer 025, an ion storage layer 023 and a transparent conductive layer 022 in sequence between two layers of substrate 021. The working principle of the electrochromic device is that a driving power source 01 is applied to the electrodes at both ends of the electrochromic device, and ions flow into (or migrate out of) the electrochromic layer 024 under the action of the electric field of the applied voltage, so that the number of ions in the electrochromic 024 material decreases (or increases), and the electrochromic material changes color before reaching equilibrium; when equilibrium is reached, the color change of the electrochromic material reaches stability.

[0026] The color of electrochromic devices is usually controlled by adjusting the applied voltage. However, in practical applications, electrochromic devices face the problem of frequently switching the display state, which poses a great challenge to the electrochromic device driving technology. In the related art, the display state of the electrochromic device is mainly changed by manually switching the driving voltage. For example, the color of the electrochromic device is deepened or faded by manually switching to control the connection and closing of the constant voltage at both ends of the electrochromic device. However, this method of manually switching the driving voltage is not only inefficient, but also cannot guarantee the stability of the color change control of the electrochromic device.

[0027] In order to solve the problems of the prior art, the embodiments of the present application provide a color adjustment driving device of an electrochromic device and a control method thereof to improve the color adjustment efficiency and stability of the electrochromic device. The color adjustment driving device of the electrochromic device provided in the embodiments of the present application is first introduced below.

[0028] Figure 2 FIG. 1 is a schematic diagram showing a structure of a color adjustment driving device of an electrochromic device provided by an embodiment of the present application. Figure 2 As shown, the color adjustment driving device 03 of the electrochromic device includes: a microprocessor 031, a controllable switch unit 034, a power amplification unit 032 and a gate driving unit 033;

[0029] The first end of the microprocessor 031 is connected to the host computer 04, the second end of the microprocessor 031 is connected to the first end of the controllable switch unit 034 through the gate drive unit 033, the third end of the microprocessor 031 is connected to the second end of the controllable switch unit 034 through the power amplifier unit 032, and the third end of the controllable switch unit 034 is connected to the electrochromic device 02;

[0030] The microprocessor 031 is used to receive the control signal of the host computer 02, and output the voltage waveform signal and the duty cycle signal based on the control signal;

[0031] The power amplification unit 032 is used to receive the voltage waveform signal and amplify the power of the voltage waveform signal to meet the driving requirements of the electrochromic device 02;

[0032] The gate driving unit 033 is used to receive the duty cycle signal, and control the on time and off time of the second end and the third end of the controllable switch unit 034 through the duty cycle signal.

[0033] It should be noted that the specific model of the microprocessor (MCU) can be selected as needed. For example, in one example, the microprocessor can be a DSP (digital signal processor). The controllable switch unit is mainly used to control the on and off of the driving voltage of the electrochromic device. In one example, the controllable switch unit can be a metal oxide field effect transistor (MOSFET) or an insulated gate bipolar transistor (IGBT). The host computer is a system host, mobile phone, computer and other equipment with strong computing power and can directly interact with the user. In one example, the host computer can communicate data with the color adjustment drive device of the electrochromic device through RS422A serial communication. The microprocessor parses the control signal sent from the host computer, performs calculation processing, and generates a voltage waveform signal and a duty cycle signal.

[0034] In some embodiments, the user can directly issue color adjustment instructions to the electrochromic device through the host computer, and then the host computer programs the expected voltage waveform and sends it to the microprocessor in the form of a control signal. The microprocessor adjusts the amplitude and polarity of the output voltage of the color adjustment drive device through the voltage waveform signal, thereby achieving adjustable control of the number of ions in the electrochromic layer of the electrochromic device, which can effectively solve the problem of color change (increasing transparency or reducing transparency) control stability of the electrochromic device.

[0035] In order to prevent the electrochromic device from changing too fast or too slow, causing dizziness or discomfort, in some embodiments, the expected voltage waveform can be programmed by the host computer to adjust the slope of the output voltage waveform, and the slope of the output voltage waveform can be sent to the microprocessor through a control signal, and then the microprocessor can control the movement rate of the electrolyte layer ions in the electrochromic device through the voltage waveform signal, which can effectively solve the problem of being unable to control the color change rate (increasing transparency or reducing transparency) of the electrochromic device. Therefore, in some embodiments, the voltage waveform signal includes the slope, amplitude and polarity of the output voltage waveform of the color adjustment drive device.

[0036] In some embodiments, the voltage waveform signal includes a bipolar voltage signal. When it is necessary to control the color of the electrochromic device to deepen, a positive voltage can be added to the electrochromic device through the voltage waveform signal, so that the color of the electrochromic device deepens. When it is necessary to control the fading of the electrochromic device, a negative voltage can be added to the electrochromic device through the voltage waveform signal, which can accelerate the fading of the electrochromic device.

[0037] It should be noted that, since the electrochromic device is a device in which ions flow (or migrate) into the electrochromic layer under the action of the electric field of the applied voltage, the number of ions in the electrochromic material is reduced (or increased), thereby causing a color change. Therefore, even if the external voltage applied to both ends of the electrochromic device remains unchanged, the number of ions in the electrochromic material will continue to change. Therefore, in order to keep the color of the electrochromic device in a non-initial state (a state in which the driving voltage is 0), it is necessary to disconnect the voltage provided to the electrochromic device in stages. In the embodiment of the present application, the on-time and off-time of the second and third ends of the controllable switch unit are mainly controlled by the duty cycle signal, so as to control the on and off of the voltage signal supplied to the electrochromic device. In one example, the controllable switch unit includes a metal oxide field effect transistor (MOSFET), the first end of the controllable switch unit is the gate of the metal oxide field effect transistor, the second end of the controllable switch unit is the drain of the metal oxide field effect transistor, and the third end of the controllable switch unit is the source of the metal oxide field effect transistor. When the gate of the metal oxide field effect transistor receives a high-level signal, the drain and the source are turned on, and when the gate of the metal oxide field effect transistor receives a low-level signal, the drain and the source are disconnected.

[0038] In some embodiments, the power amplification unit increases the power corresponding to the voltage waveform signal mainly by increasing the current of the voltage waveform signal to meet the driving requirements of the electrochromic device.

[0039] In some embodiments, the duty cycle (Duty Ratio) refers to the ratio of the high level time to the entire cycle time in a pulse width modulation (PWM) signal. The gate drive unit is used to convert the duty cycle signal into a drive signal that can drive the controllable switch unit, so as to control the on time and off time of the second end and the third end of the controllable switch unit through the duty cycle signal. For example, in one example, the gate drive unit receives an initial duty cycle signal with a high level of 5V and a low level of 0V; the gate drive unit can convert the duty cycle signal into a high level of 15V and a low level of 0V to better control the on and off of the controllable switch unit.

[0040] Electrical stress has a great influence on the performance of electrochromic devices. Overvoltage stress or overcurrent stress will cause different degrees of damage to the device. In order to ensure the reliable operation of the electrochromic device, the electrochromic device needs to be protected. Therefore, in some embodiments, reference Figure 5 , the color adjustment driving device 03 of the electrochromic device also includes a current collection unit;

[0041] The current collection unit is used to collect the output current output to the electrochromic device 02 and feed the output current back to the microprocessor;

[0042] The microprocessor is also used to stop outputting the voltage waveform signal when the output current is controlled to be greater than a preset protection current, and / or to cut off the second and third ends of the controllable switch unit by controlling the duty cycle signal.

[0043] It should be noted that the preset protection current can be preset and stored in the microprocessor, or can be sent to the microprocessor by the host computer through a control signal, and there is no limitation on this. When it is determined through the recovered output current that the output current is greater than the preset protection current, the output voltage waveform signal can be directly stopped so that the driving voltage received by the electrochromic device is 0, or the second end and the third end of the above-mentioned controllable switch unit can be cut off by controlling the duty cycle signal so that the electrochromic device does not receive the driving voltage.

[0044] In some embodiments, reference Figure 5 , the color adjustment driving device 03 of the electrochromic device also includes a voltage collection unit;

[0045] The voltage sampling unit is used to collect the output voltage output to the electrochromic device 02 and feed the output voltage back to the microprocessor;

[0046] The above mentioned microprocessor is also used for:

[0047] When the output voltage is greater than the preset protection voltage, the output voltage waveform signal is stopped, and / or the second end and the third end of the controllable switch unit are cut off by controlling the duty cycle signal;

[0048] When the output voltage is not greater than a preset protection voltage, the voltage waveform signal output is adjusted based on the output voltage.

[0049] It should be noted that the preset protection voltage can be preset and stored in the microprocessor, or it can be sent to the microprocessor by the host computer through a control signal, and there is no limitation on this. Compared with the recovered output current, the output voltage is not only used to protect the electrochromic device when the output voltage is greater than the preset protection voltage. Moreover, the recovered output voltage is also used when the output voltage is not greater than the preset protection voltage, that is, when the current output voltage does not cause damage to the electrochromic device, the voltage waveform signal is dynamically adjusted through the output voltage to more accurately control the color change of the electrochromic device. For example, in one example, when the recovered output voltage is less than the expected voltage in the microprocessor, the output voltage of the color adjustment drive device of the electrochromic device can be increased by adjusting the voltage waveform signal.

[0050] In order to achieve closed-loop control of the transparency of the electrochromic device, in some embodiments, reference Figure 5 , the color adjustment driving device 03 of the electrochromic device also includes a transparency sensor;

[0051] The transparency sensor is used to collect the transparency of the electrochromic device 02 and feed the transparency back to the microprocessor;

[0052] The microprocessor is further configured to adjust the duty cycle signal through the transparency.

[0053] It should be noted that the microprocessor obtains the feedback transparency of the current electrochromic device through the transparency sensor, and compares the feedback transparency with the target transparency of the electrochromic device sent by the host computer, and then adjusts the above-mentioned duty cycle signal according to the comparison result. In one example, if the target transparency is greater than the feedback transparency, the duty cycle signal is controlled to output a high level, and the gate drive unit controls the controllable switch unit to turn on, and the power voltage output is turned on. If the target transparency is less than or equal to the feedback transparency, the duty cycle signal is controlled to output a low level, and the gate drive unit controls the controllable switch unit to turn off, and the power voltage output is disconnected.

[0054] In some embodiments, the microprocessor can compare the target transparency of the electrochromic device sent by the host computer with the feedback transparency, use the BangBang Control method to control the transparency of the electrochromic device, generate a duty cycle signal with adjustable pulse width, generate a gate drive signal after the driver chip, and control the controllable switch to switch on and off after the gate drive module. By controlling the duty cycle signal, the transparency of the electrochromic device can be controlled and maintained.

[0055] In some embodiments, reference Figure 5 The color adjustment drive device 03 of the electrochromic device also includes a signal conditioning unit and an internal analog quantity acquisition unit. The signal conditioning unit performs interface matching in a voltage following manner to enhance the anti-interference ability of the signal, and at the same time uses a low-pass filter circuit to suppress noise and filter the analog quantity acquisition signal to reduce the impact of signal interference on the acquisition. The internal analog quantity acquisition unit can realize the acquisition function of the loading voltage, current, feedback transparency and other internal analog quantity signals of the electrochromic device. Among them, the current acquisition can be designed with a Hall current sensor to meet the requirements of bidirectional current acquisition.

[0056] In some embodiments, reference Figure 3 The color adjustment driving device 03 of the electrochromic device further includes a digital-to-analog converter 035 disposed between the power amplification unit 032 and the microprocessor 031;

[0057] The digital-to-analog converter 035 is used to convert the voltage waveform signal from a digital signal to an analog signal;

[0058] The microprocessor 031 is also used to collect the analog voltage signal output by the digital-to-analog converter 035 and adjust the voltage waveform signal according to the analog voltage signal.

[0059] In some embodiments, the microprocessor (MCU) receives the control signal sent by the host computer, generates a voltage waveform signal after logic operation, and the voltage waveform signal can be a digital signal, and then the digital signal is converted into an analog signal through a digital-to-analog converter. In one example, the digital signal generated by the microprocessor is a 16-bit parallel signal and a clock signal, and then the digital-to-analog converter receives the 16-bit parallel signal and clock signal of the microprocessor through serial communication for digital-to-analog conversion, providing a control voltage signal for the color-changing action of the electrochromic device. It should be noted that the voltage waveform signal after the digital-to-analog conversion can be a continuous voltage signal that changes with time.

[0060] In some implementations, the digital-to-analog converter uses a 16-bit high-precision DAC as its core to perform data conversion on parallel signals sent by a microprocessor (MCU) to generate a linearly adjustable voltage in the range of -5 to 5V, which can meet the working requirements of forward discoloration and reverse fading of the electrochromic device.

[0061] In some implementations, the microprocessor may include a digital-to-analog conversion module, that is, the voltage waveform signal output by the microprocessor may be directly an analog signal. In order to more accurately control the color-changing action of the electrochromic device, the microprocessor will collect the analog signal after the digital-to-analog converter outputs the analog signal through digital-to-analog conversion, and reconvert the collected analog signal into a digital signal through the analog-to-digital conversion module integrated in the microprocessor itself, and then compare it with the voltage waveform signal originally output by the microprocessor, and adjust the voltage waveform signal so that the analog voltage signal output by the digital-to-analog converter meets expectations, that is, the difference with the voltage waveform signal originally output by the microprocessor is smaller.

[0062] In some embodiments, reference Figure 5 , the color adjustment driving device 03 of the electrochromic device also includes an analog-to-digital converter;

[0063] The first end of the analog-to-digital converter is connected to the microprocessor, the second end of the analog-to-digital converter is connected to the current acquisition unit, and the third end of the analog-to-digital converter is connected to the voltage acquisition unit;

[0064] The analog-to-digital converter is used to convert the output current and output voltage fed back to the microprocessor into digital signals.

[0065] In some cases, the analog-to-digital converter is used to convert the output current and output voltage collected by the current collection unit and the voltage collection unit into digital signals. Compared with the analog-to-digital conversion module integrated in the microprocessor, the analog-to-digital converter can provide a digital signal with higher precision.

[0066] In some cases, the analog-to-digital converter can use a 16-bit high-precision ADC chip with bipolar acquisition function, which can meet the ability to collect bipolar voltages of electrochromic devices. At the same time, the multi-channel design can realize the synchronous acquisition of voltage and current signals to ensure the real-time rate of the signal.

[0067] In some embodiments, reference Figure 4 The color adjustment driving device of the electrochromic device further includes a current protection unit 037 disposed between the power amplification unit 032 and the controllable switch unit 034;

[0068] The current protection unit 037 is used to disconnect the power amplification unit 032 from the controllable switch unit 034 when the current output by the power amplification unit 032 is greater than a preset protection current, so as to perform physical current limiting protection on the electrochromic device.

[0069] In some embodiments, reference Figure 4 The color adjustment driving device of the electrochromic device further includes a voltage protection unit 038 disposed between the controllable switch unit 034 and the electroluminescent device 02;

[0070] The voltage protection unit 038 is used to disconnect the controllable switch unit 034 from the electroluminescent device 02 when the voltage output by the controllable switch unit 034 is greater than a preset protection voltage, so as to perform physical voltage limiting protection on the electrochromic device.

[0071] It should be noted that, in some embodiments, the color adjustment drive device of the electrochromic device is designed with overvoltage and overcurrent protection functions. When the controlled electrochromic device or the functional circuit is abnormal, the output voltage and current exceed the allowed limit, and the software protection is triggered first, that is, the protection is performed by controlling the voltage waveform signal and the duty cycle signal. If the software protection does not respond successfully, the hardware protection will be triggered, that is, the output current is limited or the power output circuit is cut off through the current protection unit and the voltage protection unit until the output voltage and current are reduced to the limited range.

[0072] In some embodiments, reference Figure 6 The color adjustment driving device of the electrochromic device further includes a level conversion unit 036 disposed between the microprocessor 031 and the gate driving unit 033; the gate driving unit 033 includes a driving power supply 0331, a driving chip 0332 and a gate driving module 0333;

[0073] The first end of the driving chip 0332 is connected to the driving power supply 0331, the second end of the driving chip 0332 is connected to the level conversion unit 036, and the third end of the driving chip 0332 is connected to the first end of the controllable switch unit 034 through the gate driving module 0333;

[0074] The level conversion unit 036 is used to convert the duty cycle signal into a driving signal that can control the driving chip 0332;

[0075] The driving power supply 0331 is used to supply power to the driving chip 0332;

[0076] The driving chip 0332 is used to receive the driving signal and output a gate driving signal for controlling the conduction and cutoff of the second end and the third end of the controllable switch unit 034 based on the driving signal;

[0077] The gate driving module 0333 is used to perform resistance and capacitance on the gate driving signal to control the conduction and cutoff speed of the second end and the third end of the controllable switch unit 034 .

[0078] It should be noted that, in some embodiments, the level conversion unit uses a dedicated bidirectional level conversion chip, which can not only meet the interface matching requirements of the microprocessor signal and the driver chip signal, but also can perform the recovery of the drive signal to improve the working reliability. In one example, the level conversion unit can convert the high level in the duty cycle signal output by the microprocessor from 3.3V to 5V, which is used to adapt and control the gate drive unit. After the driver chip of the gate drive unit receives the duty cycle signal with a low level of 0V and a high level of 5V, it outputs a gate drive signal with a low level of 0V and a high level of 15V according to the duty cycle signal, so that the first end of the controllable switch unit connects the second end and the third end when receiving the high level of 15V, and disconnects the second end and the third end when the first end receives the low level of 0V.

[0079] In some embodiments, the gate driving unit includes a gate driving module mainly composed of resistors and capacitors, and controls the conduction and cutoff speed of the second and third ends of the controllable switch unit by performing resistance and capacitance on the gate driving signal output by the driving chip.

[0080] It should be noted that, for the convenience of description, the above device is described in various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0081] The color adjustment driving device of the electrochromic device in the embodiment of the present application receives the control signal of the host computer through the microprocessor, so that the color adjustment of the electrochromic device can be performed by programming the expected voltage waveform through the host computer, and the amplitude and polarity of the output voltage of the device are adjusted, thereby realizing adjustable control of the number of ions in the electrochromic layer of the electrochromic device, which can effectively solve the problem of color change control stability of the electrochromic device. After receiving the control signal of the host computer, the microprocessor can output a voltage waveform signal and a duty cycle signal according to the control signal. After the voltage waveform signal is power amplified by the power amplifier unit, it is turned on by the controllable switch unit and can be used as the driving voltage for the color change of the electrochromic device; after the duty cycle signal is input to the gate drive unit, the gate drive unit controls the on time and off time of the controllable switch unit according to the duty cycle signal, so as to control the on and off of the driving voltage of the electrochromic device. The output voltage waveform signal and duty cycle signal output by the microprocessor can achieve precise control of the color adjustment voltage of the electrochromic device and realize automatic connection and disconnection of the driving voltage, so that the transparency of the electrochromic device can be maintained in a certain state without manual switching of the driving voltage, thereby improving the stability and efficiency of the color adjustment of the electrochromic device.

[0082] In addition, the color adjustment drive device of the electrochromic device of the present application can control the movement rate of the electrolyte layer ions in the electrochromic device by adjusting the slope of the output voltage waveform of the color adjustment drive device, which can effectively solve the problem of being unable to control the color change rate (increasing transparency or reducing transparency) of the electrochromic device. The transparency target value of the electrochromic device is set by the host computer, and the feedback transparency is monitored in real time. By adjusting the duty cycle of the output voltage of the color adjustment drive device, closed-loop control of the transparency of the electrochromic device is achieved, which can effectively solve the problem of stepless color change control of the electrochromic device. The color adjustment drive device is designed with analog signal acquisition function and output protection function, which can monitor the voltage and current of the electrochromic device in real time, and realize overvoltage and overcurrent protection of the controlled electrochromic device, which can effectively solve the purpose of fault protection of the electrochromic device.

[0083] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments, the present application also provides a control method for a color adjustment driving device of an electrochromic device. The control method is applied to the color adjustment driving device of the electrochromic device in any of the above-mentioned embodiments, and reference is made to Figure 7 , the control method comprises the following steps:

[0084] S701, the microprocessor receives a control signal sent by a host computer, and outputs a voltage waveform signal and a duty cycle signal based on the control signal.

[0085] It should be noted that the voltage waveform signal is used to control the polarity, amplitude and slope of the color adjustment driving voltage of the electrochromic device; the duty cycle signal is used to control the on time and off time of the color adjustment driving voltage of the electrochromic device.

[0086] In some embodiments, the microprocessor generates a voltage waveform signal with adjustable amplitude, slope, and polarity according to the control signal sent by the host computer, outputs a power voltage of -5 to 5V after passing through the power amplifier circuit, drives the electrochromic device to change color according to the control requirements, and realizes the increase and decrease control of the transparency of the electrochromic device. In one example, the specific control logic is as follows: outputting a 0 to 5V voltage to control the transparency of the electrochromic device to decrease, and vice versa, outputting a 0 to -5V voltage to control the transparency of the electrochromic device to increase, increasing the slope of the output voltage to control the transparency of the electrochromic device to accelerate the change speed, and reducing the slope of the output voltage to control the transparency of the electrochromic device to slow down the change speed.

[0087] In some embodiments, the controllable switch unit controls the on-off output of the power voltage of the color adjustment driving device through a duty cycle signal.

[0088] In some embodiments, the microprocessor compares the target transparency of the electrochromic device sent by the host computer with the feedback transparency, and uses the start-stop control method to control the transparency of the electrochromic device, generates a duty cycle signal with adjustable pulse width, generates a gate drive signal after the driver chip, and controls the controllable switch unit to switch on and off after the gate drive module. By controlling the duty cycle of the duty cycle signal, the control and maintenance of the transparency of the electrochromic device is achieved. In one example, the control logic is as follows: if the target transparency is greater than the feedback transparency, the duty cycle signal outputs a high level, generates a gate drive signal after the driver chip, and controls the controllable switch unit to turn on after the gate drive module, and turns on the power voltage output; if the target transparency is less than or equal to the feedback transparency, the duty cycle signal outputs a low level, generates a gate drive signal after the driver chip, and controls the controllable switch unit to turn off after the gate drive module, and disconnects the power voltage output.

[0089] The control method of the color adjustment driving device of the electrochromic device in the above-mentioned embodiment is used to realize the functions and effects of the corresponding color adjustment driving device of the electrochromic device in any of the above-mentioned embodiments, and has the beneficial effects of the corresponding device embodiments, which will not be repeated here.

[0090] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0091] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0092] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0093] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0094] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A color adjustment driving device for an electrochromic device, characterized in that: include: Microprocessor, controllable switch unit, power amplifier unit and gate drive unit; The first end of the microprocessor is connected to the host computer, the second end of the microprocessor is connected to the first end of the controllable switch unit through the gate driving unit, the third end of the microprocessor is connected to the second end of the controllable switch unit through the power amplification unit, and the third end of the controllable switch unit is connected to the electrochromic device; The microprocessor is used to receive a control signal from a host computer, and output a voltage waveform signal and a duty cycle signal based on the control signal; The power amplification unit is used to receive the voltage waveform signal and amplify the power of the voltage waveform signal to meet the driving requirements of the electrochromic device; The gate driving unit is used to receive the duty cycle signal, and control the on-time and off-time of the second end and the third end of the controllable switch unit through the duty cycle signal.

2. The device according to claim 1, characterized in that The device also includes a current collection unit; The current collection unit is used to collect the output current output to the electrochromic device and feed the output current back to the microprocessor; The microprocessor is also used to stop outputting the voltage waveform signal when the output current is controlled to be greater than a preset protection current, and / or to cut off the second end and the third end of the controllable switch unit by controlling the duty cycle signal.

3. The device according to claim 2, characterized in that The device also includes a voltage collection unit; The voltage sampling unit is used to collect the output voltage output to the electrochromic device and feed the output voltage back to the microprocessor; The microprocessor is also used for: When the output voltage is greater than the preset protection voltage, stop outputting the voltage waveform signal, and / or control the duty cycle signal to cut off the second end and the third end of the controllable switch unit; When the output voltage is not greater than a preset protection voltage, the output voltage waveform signal is adjusted based on the output voltage.

4. The device according to claim 1, characterized in that The device also includes a transparency sensor; The transparency sensor is used to collect the transparency of the electrochromic device and feed back the transparency to the microprocessor; The microprocessor is further configured to adjust the duty cycle signal by the transparency.

5. The device according to claim 3, characterized in that The device also includes a digital-to-analog converter disposed between the power amplification unit and the microprocessor; The digital-to-analog converter is used to convert the voltage waveform signal from a digital signal to an analog signal; The microprocessor is also used to collect the analog voltage signal output by the digital-to-analog converter, and adjust the voltage waveform signal through the analog voltage signal.

6. The device according to claim 5, characterized in that The device also includes an analog-to-digital converter; The first end of the analog-to-digital converter is connected to the microprocessor, the second end of the analog-to-digital converter is connected to the current acquisition unit, and the third end of the analog-to-digital converter is connected to the voltage acquisition unit; The analog-to-digital converter is used to convert the output current and output voltage fed back to the microprocessor into digital signals.

7. The device according to claim 1, characterized in that The device further comprises a current protection unit arranged between the power amplification unit and the controllable switch unit; The current protection unit is used to disconnect the connection between the power amplification unit and the controllable switch unit when the current output by the power amplification unit is greater than a preset protection current.

8. The device according to claim 1, characterized in that The device further comprises a voltage protection unit arranged between the controllable switch unit and the electroluminescent device; The voltage protection unit is used to disconnect the connection between the controllable switch unit and the electroluminescent device when the voltage output by the controllable switch unit is greater than a preset protection voltage.

9. The device according to claim 1, characterized in that The device further comprises a level conversion unit disposed between the microprocessor and the gate driving unit; the gate driving unit comprises a driving power supply, a driving chip and a gate driving module; The first end of the driving chip is connected to the driving power supply, the second end of the driving chip is connected to the level conversion unit, and the third end of the driving chip is connected to the first end of the controllable switch unit through the gate driving module; The level conversion unit is used to convert the duty cycle signal into a driving signal that can control the driving chip; The driving power supply is used to supply power to the driving chip; The driving chip is used to receive the driving signal, and output a gate driving signal for controlling the conduction and cutoff of the second end and the third end of the controllable switch unit based on the driving signal; The gate driving module is used to perform resistance and capacitance on the gate driving signal to control the speed of conduction and cutoff of the second end and the third end of the controllable switch unit.

10. A control method for a color adjustment driving device of an electrochromic device, characterized in that: The method is applied to the device according to any one of claims 1 to 9, and the method comprises: The microprocessor receives a control signal sent by a host computer, and outputs a voltage waveform signal and a duty cycle signal based on the control signal; The voltage waveform signal is used to control the polarity, amplitude and slope of the color adjustment driving voltage of the electrochromic device; the duty cycle signal is used to control the on time and off time of the color adjustment driving voltage of the electrochromic device.

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