Electrochromic drive circuit and electrochromic device

Abstract

The application provides an electrochromic driving circuit, comprising: a control module, comprising a first pin and a second pin, the first pin outputs a first level signal and a second level signal in time, the second pin outputs the first level signal and the second level signal in time, and the first pin and the second pin output different level signals at the same time; a driving module, comprising a first driving unit and a second driving unit connected in parallel, the first driving unit is electrically connected with the first pin, and the second driving unit is electrically connected with the second pin; when the first driving unit and the second driving unit receive the first level signal, the first driving unit and the second driving unit output a first control signal, and when the first driving unit and the second driving unit receive the second level signal, the first driving unit and the second driving unit output a second control signal. The application also provides an electrochromic device.

Description

Technical Field

[0001] This application relates to an electrochromic driving circuit and an electrochromic device including the electrochromic driving circuit. Background Technology

[0002] With the rapid development of smart devices, users demand better integration between these devices and their environment, making their use more intelligent. To enable the display of smart devices to adapt to changes in ambient light, an electrochromic device can be incorporated, comprising an electrochromic lens. Electrochromic lenses typically employ Suspended Particle Device (SPD) technology, Polymer Dispersed Liquid Crystal (PDLC) technology, or Electrochromic (EC) technology. However, when using electrochromic technology, the control modules required to change the light transmittance of the electrochromic lens need more control terminals, resulting in higher manufacturing costs. Summary of the Invention

[0003] The first aspect of this application provides an electrochromic driving circuit, comprising:

[0004] The control module includes a first pin and a second pin. The first pin outputs a first-level signal and a second-level signal in a time-division multiplexing manner, and the second pin outputs both the first-level signal and the second-level signal in a time-division multiplexing manner. The first pin and the second pin output different level signals at the same time.

[0005] The driving module includes a first driving unit and a second driving unit connected in parallel. The first driving unit is electrically connected to the first pin, and the second driving unit is electrically connected to the second pin. When the first driving unit and the second driving unit receive the first level signal, they output a first control signal. When the first driving unit and the second driving unit receive the second level signal, they output a second control signal.

[0006] In the aforementioned electrochromic driving circuit, the first pin of the control module controls the first driving unit, and the second pin controls the second driving unit. That is, one pin of the control module controls one driving unit, which simplifies the circuit structure, reduces the area occupied by the circuit on the printed circuit board, and lowers manufacturing costs.

[0007] A second aspect of this application provides an electrochromic device, comprising:

[0008] The electrochromic driving circuit described above;

[0009] An electrochromic lens is electrically connected to the driving module, and the light transmittance of the electrochromic lens changes with the control signal output by the driving module.

[0010] The electrochromic device described above integrates the electrochromic driving circuit described above, and can achieve all the beneficial effects of the electrochromic driving circuit described above. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the module of the electrochromic device according to an embodiment of this application.

[0012] Figure 2 This is a schematic diagram of the circuit structure of an electrochromic driving circuit according to an embodiment of this application.

[0013] Figure 3 This is a schematic diagram of the circuit structure of an electrochromic driving circuit according to another embodiment of this application.

[0014] Figure 4 for Figure 1 A schematic diagram of the working process of the electrochromic device.

[0015] Explanation of main component symbols

[0016] Electrochromic device: 1

[0017] Electrochromic drive circuit: 100

[0018] Control modules: 10

[0019] First pin: Pin1

[0020] Second pin: Pin2

[0021] Third pin: Pin3

[0022] Driver module: 20

[0023] First drive unit: 21

[0024] First output terminal: Vout1

[0025] First transistor: Q1

[0026] Second transistor: Q2

[0027] Second drive unit: 22

[0028] Second output terminal: Vout2

[0029] Third transistor: Q3

[0030] Fourth transistor: Q4

[0031] Fifth transistor: Q5

[0032] Diode: 30

[0033] First power supply: 40

[0034] Second power supply: 50

[0035] Electrochromic lenses: 200

[0036] First transparent conductive layer: 201

[0037] Second transparent conductive layer: 202

[0038] Electrochromic layer: 203

[0039] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0040] Many smart devices (such as head-mounted displays) incorporate electrochromic devices. Ambient light is transmitted through the electrochromic device and then reaches the human eye. The electrochromic device adjusts its own transmittance to regulate the intensity of ambient light reaching the human eye, allowing the brightness of the smart device's display to adapt to changes in ambient light intensity.

[0041] Please see Figure 1 The electrochromic device 1 of this application embodiment includes an electrochromic driving circuit 100 and an electrochromic lens 200. The electrochromic driving circuit 100 includes a control module 10 and a driving module 20. The driving module 20 includes a first driving unit 21 and a second driving unit 22. The control module 10 is electrically connected to the first driving unit 21 and the second driving unit 22 respectively, and is used to control the first driving unit 21 and the second driving unit 22 to output different control signals. The electrochromic lens 200 is electrically connected to the first driving unit 21 and the second driving unit 22 respectively, and the light transmittance of the electrochromic lens 200 changes with the control signal output by the driving module 20.

[0042] The electrochromic lens 200 includes a first transparent conductive layer 201, a second transparent conductive layer 202, and an electrochromic layer 203. The electrochromic layer 203 is located between the first and second transparent conductive layers 201 and 202. The first transparent conductive layer 201 is electrically connected to a first driving unit 21, and the second transparent conductive layer 202 is electrically connected to a second driving unit 22. When the first and second transparent conductive layers 201 and 202 receive control signals of different amplitudes, a voltage difference exists between them, generating an electric field. Under the influence of this electric field, the light transmittance of the electrochromic layer 203 changes. Therefore, by adjusting the control signal, the electric field strength can be adjusted, thereby adjusting the light transmittance of the electrochromic layer 203 (or the light transmittance of the electrochromic lens 200).

[0043] Please see Figure 2 The control module 10 includes a first pin (Pin1) and a second pin (Pin2). The first pin (Pin1) outputs a first-level signal and a second-level signal in a time-division multiplexing manner, as does the second pin (Pin2). The first pin (Pin1) and the second pin (Pin2) output different level signals at the same time; that is, when the first pin (Pin1) outputs a first-level signal, the second pin (Pin2) outputs a second-level signal, and vice versa.

[0044] The first driving unit 21 and the second driving unit 22 are connected in parallel. The first driving unit 21 is electrically connected to the first pin Pin1, and the second driving unit 22 is electrically connected to the second pin Pin2. When the first driving unit 21 and the second driving unit 22 receive a first level signal, they output a first control signal; when the first driving unit 21 and the second driving unit 22 receive a second level signal, they output a second control signal.

[0045] The electrochromic driving circuit 100 also includes a second power supply 50, electrically connected to the control module 10, for providing voltage to the control module 10. In this embodiment, the control module 10 is a microcontroller unit (MCU). After receiving the voltage signal output by the second power supply 50, the control module 10 outputs different level signals at the same time on its first pin Pin1 and second pin Pin2, causing the first driving unit 21 and the second driving unit 22 to output different control signals after receiving different level signals. That is, when the first pin Pin1 outputs a first level signal and the second pin Pin2 outputs a second level signal, the first driving unit 21 outputs a first control signal and the second driving unit 22 outputs a second control signal; when the first pin Pin1 outputs a second level signal and the second pin Pin2 outputs a first level signal, the first driving unit 21 outputs a second control signal and the second driving unit 22 outputs a first control signal.

[0046] Please refer to the following: Figure 1The first driving unit 21 has a first output terminal Vout1, and the second driving unit 22 has a second output terminal Vout2. The first driving unit 21 outputs a first control signal or a second control signal through the first output terminal Vout1, and the second driving unit 22 outputs the first control signal or the second control signal through the second output terminal Vout2. Both the first control signal and the second control signal are voltage signals, and the voltage value of the first control signal is greater than the voltage value of the second control signal. The first output terminal Vout1 and the second output terminal Vout2 are electrically connected to the first transparent conductive layer 201 and the second transparent conductive layer 202 of the electrochromic lens 200, respectively. The first output terminal Vout1 and the second output terminal Vout2 output control signals of different amplitudes at the same time, so that there is a voltage difference between the first transparent conductive layer 201 and the second transparent conductive layer 202, thereby generating an electric field. Under the action of the electric field, the light transmittance of the electrochromic layer 203 changes.

[0047] In this embodiment, the electrochromic driving circuit 100 can operate in a first working mode and a second working mode in a time-division manner, so that the light transmittance of the electrochromic lens 200 changes.

[0048] When the electrochromic driving circuit 100 is in the first working mode, the first pin Pin1 outputs a first level signal and the second pin Pin2 outputs a second level signal. At this time, the first output terminal Vout1 outputs a first control signal and the second output terminal Vout2 outputs a second control signal, so that the voltage of the first output terminal Vout1 is greater than the voltage of the second output terminal Vout2, and the light transmittance of the electrochromic lens 200 gradually decreases.

[0049] When the electrochromic driving circuit 100 is in the second working mode, the first pin Pin1 outputs a second level signal and the second pin Pin2 outputs a first level signal. The first driving unit 21 outputs the second control signal and the second driving unit 22 outputs the first control signal, so that the voltage of the first output terminal Vout1 is less than the voltage of the second output terminal Vout2, and the light transmittance of the electrochromic lens 200 gradually increases.

[0050] Please refer to the following: Figure 2 In this embodiment, the first driving unit 21 includes a first transistor Q1 and a second transistor Q2. The first transistor Q1 and the second transistor Q2 are connected in series, and the node between the first transistor Q1 and the second transistor Q2 is connected to the first output terminal Vout1. The control terminals of the first transistor Q1 and the second transistor Q2 are respectively coupled to the first pin Pin1.

[0051] The second driving unit 22 includes a third transistor Q3 and a fourth transistor Q4. The third transistor Q3 and the fourth transistor Q4 are connected in series, and the node between the third transistor Q3 and the fourth transistor Q4 is connected to the second output terminal Vout2. The control terminals of the third transistor Q3 and the fourth transistor Q4 are respectively coupled to the second pin Pin2.

[0052] The first transistor Q1 is also connected in series with the third transistor Q3, and the second transistor Q2 is also connected in series with the fourth transistor Q4, thereby establishing an electrical connection between the first driving unit 21 and the second driving unit 22.

[0053] In this embodiment, the first transistor Q1, the second transistor Q2, the third transistor Q3, and the fourth transistor Q4 are all Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs), abbreviated as MOS transistors. Specifically, the first transistor Q1 and the third transistor Q3 are PMOS transistors, and the second transistor Q2 and the fourth transistor Q4 are NMOS transistors. The gates of the first transistor Q1 and the second transistor Q2 are electrically connected to the first pin Pin1, and the gates of the third transistor Q3 and the fourth transistor Q4 are electrically connected to the second pin Pin2. The source of the first transistor Q1 is electrically connected to the source of the third transistor Q3, and the source of the second transistor Q2 is electrically connected to the source of the fourth transistor Q4 and then grounded. The drains of the first transistor Q1 and the second transistor Q2 are connected to the first output terminal Vout1, and the drains of the third transistor Q3 and the fourth transistor Q4 are connected to the second output terminal Vout2.

[0054] The electrochromic driving circuit 100 also includes a fifth transistor Q5 and a first power supply 40, with the fifth transistor Q5 connected between the first power supply 40 and the driving module 10. The control module 10 also includes a third pin Pin3, with the control terminal of the fifth transistor Q5 electrically connected to Pin3. Pin3 is used to output a level signal to control the fifth transistor Q5 to be turned on or off. When the fifth transistor Q5 is on, an electrical connection is established between the first power supply 40 and the driving module 20; when the fifth transistor Q5 is off, the electrical connection between the first power supply 40 and the driving module 20 is disconnected.

[0055] The fifth transistor, Q5, is either a PMOS or NMOS transistor. Its gate is electrically connected to pin 3, its drain is electrically connected to the first power supply 40, and its source is connected to the node between the sources of the first transistor Q1 and the third transistor Q2. A MOS transistor is a field-effect transistor that controls the flow of current by changing the conductivity of the semiconductor material through the voltage input to the gate. Taking an NMOS transistor as an example, when the gate voltage is zero or negative, the electric field between the gate and the channel is very small, and there are no electrons or holes in the channel, so the NMOS transistor is off. When a positive voltage is input to the gate, and the voltage continues to increase, the concentration of electrons or holes in the channel reaches a certain level, and the NMOS transistor turns on.

[0056] In at least one embodiment of this application, the fifth transistor Q5 is an NMOS. When the third pin Pin3 outputs a first level signal, the fifth transistor Q5 is turned on, establishing an electrical connection between the first power supply 40 and the driving module 20. When the third pin Pin3 outputs a second level signal, the fifth transistor Q5 is turned off, disconnecting the electrical connection between the first power supply 40 and the driving module 20.

[0057] In at least one embodiment of this application, the fifth transistor Q5 is a PMOS. When the third pin Pin3 outputs a first level signal, the fifth transistor Q5 is turned off, disconnecting the electrical connection between the first power supply 40 and the driving module 20. When the third pin Pin3 outputs a second level signal, the fifth transistor Q5 is turned on, establishing the electrical connection between the first power supply 40 and the driving module 20.

[0058] Please refer to the following: Figure 1 and Figure 2 The electrochromic driving circuit 100 of this application is used to switch the electrochromic lens 200 between three processes: coloring, decolorization, and maintaining the color state. The coloring process refers to the gradual decrease in the light transmittance of the electrochromic lens 200 until it reaches a minimum value; the decolorization process refers to the gradual increase in the light transmittance of the electrochromic lens 200 until it reaches a maximum value. Maintaining the color state refers to the state in which the light transmittance of the electrochromic lens 200 remains constant, at which point the light transmittance of the electrochromic lens 200 is between the maximum and minimum values ​​(excluding the maximum and minimum values). In this embodiment, the light transmittance variation range of the electrochromic lens 200 is 8% to 80% (including the endpoint values), with a minimum light transmittance of 8% and a maximum light transmittance of 80%. In other embodiments, the light transmittance variation range of the electrochromic lens 200 may exceed the above range.

[0059] Taking the fifth transistor Q5 as an NMOS transistor as an example, when the first pin Pin1 outputs a first-level signal and the second pins Pin2 and Pin3 output second-level signals, the fifth transistor Q5 is turned on, establishing an electrical connection between the first power supply 40 and the driving module 20. The first transistor Q1 is turned on, and the second transistor Q2 is turned off, with the first output terminal Vout1 outputting a first control signal. The third transistor Q3 is turned off, and the fourth transistor Q4 is turned on, with the second output terminal Vout2 outputting a second control signal. After the first transparent conductive layer 201 receives the first control signal and the second transparent conductive layer 202 receives the second control signal, a voltage difference exists between the first and second transparent conductive layers 201, generating an electric field. The direction of the electric field is from the first transparent conductive layer 201 to the second transparent conductive layer 202. Since the first output terminal Vout1 is electrically connected to the first power supply 40 through the first transistor Q1 and the fifth transistor Q5, the first power supply 40 continuously provides voltage to the first output terminal Vout1, ensuring a continuous electric field between the first transparent conductive layer 201 and the second transparent conductive layer 202. At this time, the electrochromic lens 200 is in the coloring process.

[0060] When the second pin Pin2 outputs a first-level signal, and the first pin Pin1 and the third pin Pin3 output second-level signals, the fifth transistor Q5 is turned on, establishing an electrical connection between the first power supply 40 and the drive module 20. The first transistor Q1 is turned off, and the second transistor Q2 is turned on, with the first output terminal Vout1 outputting a second control signal. The third transistor Q3 is turned on, and the fourth transistor Q4 is turned off, with the second output terminal Vout2 outputting a first control signal. The first transparent conductive layer 201 receives the second control signal, and the second transparent conductive layer 202 receives the first control signal. A voltage difference exists between the first transparent conductive layer 201 and the second transparent conductive layer 202, generating an electric field. The direction of the electric field is from the second transparent conductive layer 202 to the first transparent conductive layer 201. Since the second output terminal is electrically connected to the first power supply 40 through the third transistor Q3 and the fifth transistor Q5, the first power supply 40 continuously supplies voltage to the second output terminal Vout2, causing a continuous electric field to exist between the first transparent conductive layer 201 and the second transparent conductive layer 202. However, the direction of the electric field between the first transparent conductive layer 201 and the second transparent conductive layer 202 is opposite to the direction of the electric field between the first transparent conductive layer 201 and the second transparent conductive layer 202 when the electrochromic lens 200 is in a colored state. At this time, the electrochromic lens 200 is in a decolorization process.

[0061] When the second pin (Pin2) outputs a second-level signal, and the first pin (Pin1) and the third pin (Pin3) output first-level signals, the fifth transistor (Q5) is turned off, disconnecting the electrical connection between the first power supply (40) and the drive module (20). The first transistor (Q1) turns on, and the second transistor (Q2) turns off, with the first output terminal (Vout1) outputting a first control signal. The third transistor (Q3) turns off, and the fourth transistor (Q4) turns on, with the second output terminal (Vout2) outputting a second control signal. After the first transparent conductive layer (201) receives the first control signal and the second transparent conductive layer (202) receives the second control signal, a voltage difference exists between the first and second transparent conductive layers, generating an electric field. The direction of the electric field is from the first transparent conductive layer (201) to the second transparent conductive layer (202). Since the first power supply (40) is not electrically connected to the drive module (20), the first output terminal (Vout1) receives a momentary voltage, causing a momentary electric field to be generated between the first transparent conductive layer (201) and the second conductive layer (202). At this time, the electrochromic lens 200 is in a state of maintaining color, and the light transmittance of the electrochromic lens 200 gradually decreases until there is no voltage difference between the first transparent conductive layer 201 and the second conductive layer 202, at which point the light transmittance of the electrochromic lens 200 remains unchanged.

[0062] Please see Figure 3 In a modified embodiment of this application, the electrochromic driving circuit 100 further includes a diode 30 and a first power supply 40, but does not include a fifth transistor Q5. The control module 10 includes a third pin Pin3. The first power supply 40 is electrically connected to the third pin Pin3 and is used to establish or disconnect the electrical connection with the driving module 20 based on the level signal output from the third pin Pin3. The diode 30 is connected in series between the first power supply 40 and the first transistor Q1, and the current direction of the diode 30 is from the first power supply 40 to the first transistor Q1. When the electrochromic lens 200 is in the color-maintaining state, the diode 30 is used to prevent current from flowing from the first transistor Q1 to the first power supply 40, which would cause a change in the light transmittance of the electrochromic lens 200.

[0063] Please see Figure 4In the electrochromic device 1, the electrochromic drive circuit 100 controls the change in light transmittance of the electrochromic lens 200 as follows: When the electrochromic device 1 is powered on, the first power supply 40 is electrically connected to the drive module 20, and the electrochromic lens 200 is initialized and desaturated. Initial desaturation means that when the initial state of the electrochromic lens 200 is opaque, that is, when the light transmittance is not at its maximum value, the electrochromic lens 200 needs to be desaturated to make the light transmittance of the electrochromic lens 200 reach its maximum value. Then, the drive module 20 is used to color the electrochromic lens 200 until the light transmittance of the electrochromic lens 200 reaches the coloring condition, that is, when the light transmittance of the electrochromic lens 200 meets the user's needs, the electrical connection between the first power supply 40 and the drive module 20 is disconnected, so that the light transmittance of the electrochromic lens 200 remains unchanged. If the electrochromic lens 200 needs to be decolorized, the first power supply 40 and the drive module 20 are electrically connected again. The drive module 20 is used to decolorize the electrochromic lens 200. When the electrochromic lens 200 has completed decolorization, that is, when the light transmittance of the electrochromic lens 200 is at its maximum value, the electrical connection between the first power supply 40 and the drive module 20 is disconnected, so that the electrochromic lens 200 remains transparent.

[0064] In this embodiment, "first level signal" and "second level signal" are not used to indicate the type of electrical signal, but rather to distinguish the level of the signal. "First level signal" represents a low level, and "second level signal" represents a high level. That is, although pins 1, 2, and 3 are all used to output a first level signal in this application, it does not mean that the signal types output by pins 1, 2, and 3 are the same; they are only used to indicate that the signals output by pins 1, 2, and 3 are all low level. Similarly, although pins 1, 2, and 3 are all used to output a second level signal in this application, it does not mean that the signal types output by pins 1, 2, 2, and 3 are the same; they are only used to indicate that the signals output by pins 1, 2, 2, and 3 are all high level.

[0065] In summary, in the electrochromic driving circuit 100 of this application, the first driving unit 21 is electrically connected to the first pin Pin1, and the second driving unit 22 is electrically connected to the second pin Pin2. That is, one pin of the control module 10 controls one driving unit. Compared with the prior art, the control module 10 requires fewer pins to control the driving module 20, and the circuit structure is simpler, which helps to reduce the area occupied by the circuit on the printed circuit board and reduce manufacturing costs.

[0066] Those skilled in the art should recognize that the above embodiments are only used to illustrate this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of protection claimed in this application.

Claims

1. An electrochromic drive circuit, characterized by, The electrochromic driving circuit comprises: a control module comprising a first pin and a second pin, the first pin outputs a first voltage signal and a second voltage signal in time division, the second pin outputs the first voltage signal and the second voltage signal in time division, and the first pin and the second pin output voltage signals of different levels at the same time; a driving module comprising a first driving unit and a second driving unit connected in parallel, the first driving unit is electrically connected with the first pin, and the second driving unit is electrically connected with the second pin; the first driving unit and the second driving unit output a first control signal when receiving the first voltage signal, and output a second control signal when receiving the second voltage signal; the first control signal and the second control signal are voltage signals, and the voltage value of the first control signal is greater than that of the second control signal; when the first pin outputs the first voltage signal and the second pin outputs the second voltage signal, the first driving unit outputs the first control signal, and the second driving unit outputs the second control signal, so that the voltage at the output end of the first driving unit is greater than that at the output end of the second driving unit; when the first pin outputs the second voltage signal and the second pin outputs the first voltage signal, the first driving unit outputs the second control signal, and the second driving unit outputs the first control signal, so that the voltage at the output end of the first driving unit is less than that at the output end of the second driving unit; the first driving unit comprises a first transistor and a second transistor, the first transistor is electrically connected with the second transistor, and the control ends of the first transistor and the second transistor are respectively coupled with the first pin; the second driving unit comprises a third transistor and a fourth transistor, the third transistor is electrically connected with the fourth transistor, and the control ends of the third transistor and the fourth transistor are respectively coupled with the second pin; the first transistor is also connected in series with the third transistor, and the second transistor is also connected in series with the fourth transistor, thereby establishing the electrical connection between the first driving unit and the second driving unit. The first transistor and the third transistor are P-type metal oxide semiconductor field effect transistors, and the second transistor and the fourth transistor are N-type metal oxide semiconductor field effect transistors; 2. The electrochromic drive circuit of claim 1, wherein, the gate of the first transistor and the gate of the second transistor are electrically connected with the first pin, and the gate of the third transistor and the gate of the fourth transistor are electrically connected with the second pin; the source of the first transistor is electrically connected with the source of the third transistor, and the source of the second transistor is electrically connected with the source of the fourth transistor. The electrochromic driving circuit further comprises a fifth transistor and a first power supply, and the fifth transistor is connected between the first power supply and the driving module.

3. The electrochromic drive circuit of claim 1, wherein, ​ The control module further comprises a third pin, a control end of the fifth transistor is electrically connected with the third pin, and the third pin is used to output a level signal to control the fifth transistor to be turned on or turned off; when the fifth transistor is turned on, the electrical connection between the first power supply and the driving module is established, and when the fifth transistor is turned off, the electrical connection between the first power supply and the driving module is disconnected.

4. Electrochromic drive circuit according to claim 3, characterized in that The fifth transistor is a P-type metal oxide semiconductor field effect transistor or an N-type metal oxide semiconductor field effect transistor, a gate of the fifth transistor is electrically connected with the third pin, a drain of the fifth transistor is electrically connected with the first power supply, and a source of the fifth transistor is electrically connected with the first transistor and the third transistor.

5. The electrochromic driving circuit according to claim 4, characterized in that, if the fifth transistor is an N-type metal oxide semiconductor field effect transistor, when the third pin outputs a first level signal, the fifth transistor is turned on to establish the electrical connection between the first power supply and the driving module; and when the third pin outputs a second level signal, the fifth transistor is turned off to disconnect the electrical connection between the first power supply and the driving module; if the fifth transistor is a P-type metal oxide semiconductor field effect transistor, when the third pin outputs a first level signal, the fifth transistor is turned off to disconnect the electrical connection between the first power supply and the driving module; and when the third pin outputs a second level signal, the fifth transistor is turned on to establish the electrical connection between the first power supply and the driving module.

6. The electrochromic drive circuit of claim 1, wherein, The electrochromic driving circuit further comprises a diode and a first power supply, the control module further comprises a third pin, the first power supply is electrically connected with the third pin, and is used to establish or disconnect the electrical connection with the driving module according to the level signal output by the third pin; the diode is connected in series between the first power supply and the first transistor, a current direction of the diode is from the first power supply to the first transistor, and the diode is used to prevent the current from flowing from the first transistor to the first power supply.

7. The electrochromic drive circuit of claim 1, wherein, The electrochromic driving circuit further comprises a second power supply which is electrically connected with the control module and is used to provide a voltage for the control module.

8. An electrochromic device, characterized in that, The electrochromic driving circuit comprises: The electrochromic driving circuit according to any one of claims 1-7; An electrochromic lens which is electrically connected with the driving module, and a light transmittance of the electrochromic lens changes with the change of the control signal output by the driving module.

9. The electrochromic device of claim 8, wherein, The electrochromic lens comprises a first transparent conductive layer, a second transparent conductive layer and an electrochromic layer, the electrochromic layer is located between the first transparent conductive layer and the second transparent conductive layer, the first transparent conductive layer is electrically connected with the first driving unit, and the second transparent conductive layer is electrically connected with the second driving unit; After the first transparent conductive layer and the second transparent conductive layer receive different control signals at the same time, an electric field is generated between the first transparent conductive layer and the second transparent conductive layer, and the light transmittance of the electrochromic layer changes under the action of the electric field.

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