A driving circuit and a camera

Abstract

The application relates to a driving circuit and a camera. The driving circuit comprises a first switch module, a first filter module, a second switch module and a second filter module. The first switch module is used for being turned on under the action of a first control signal of a control circuit, so as to transmit the first control signal to the first filter module. The first filter module is used for filtering the first control signal to obtain a second control signal, and transmitting the second control signal to a filter module. The second switch module is used for being turned on under the action of a third control signal of the control circuit, so as to transmit the third control signal to the second filter module. The second filter module is used for filtering the third control signal to obtain a fourth control signal, and transmitting the fourth control signal to the filter module, so that the filter module is switched from a first filter to a second filter under the driving action of the second control signal and the fourth control signal. The camera comprises the driving circuit.

Description

Technical Field

[0001] This application relates to the field of driving circuit technology, and in particular to a driving circuit and a camera. Background Technology

[0002] With the continuous development of electronic technology and the continuous improvement of people's living standards, the market demand for surveillance cameras is increasing. Currently, the filter modules of surveillance cameras on the market require greater driving power, while the driving power of the control chips in surveillance cameras is relatively weak. Therefore, it is usually necessary to set up a dedicated driver chip on the printed circuit board of the surveillance camera to drive the filter module to switch filters, which leads to higher manufacturing costs for surveillance cameras. Utility Model Content

[0003] Therefore, it is necessary to provide a driving circuit and camera that can provide high driving capability for the filter module.

[0004] In a first aspect, embodiments of this application provide a driving circuit, the driving circuit comprising:

[0005] The system comprises a first switching module, a first filtering module, a second switching module, and a second filtering module;

[0006] The first terminal of the first switch module is connected to the first terminal of the control circuit, the second terminal of the first switch module is connected to the first terminal of the first filter module, and the third terminal of the first switch module is connected to the first power supply; the second terminal of the first filter module is connected to the filter module in the lens; the filter module includes a first filter and a second filter;

[0007] The first terminal of the second switch module is connected to the second terminal of the control circuit; the second terminal of the second switch module is connected to the first terminal of the second filter module; the third terminal of the second switch module is connected to ground; and the second terminal of the second filter module is connected to the filter module.

[0008] The first switching module is used to be turned on under the action of the first control signal of the control circuit so as to transmit the first control signal to the first filtering module;

[0009] The first filtering module is used to filter the first control signal to obtain the second control signal; and transmit the second control signal to the filter module.

[0010] The second switching module is used to be turned on under the action of the third control signal of the control circuit so as to transmit the third control signal to the second filtering module;

[0011] The second filtering module is used to filter the third control signal to obtain the fourth control signal; the fourth control signal is transmitted to the filter module so that the filter module switches from the first filter to the second filter under the driving action of the second control signal and the fourth control signal.

[0012] In one exemplary embodiment, the first switch module includes a first switch unit;

[0013] The first terminal of the first switching unit is connected to the first terminal of the control circuit, the second terminal of the first switching unit is connected to the first terminal of the first filter module, and the third terminal of the first switching unit is connected to the first power supply.

[0014] The first switching unit is used to be turned on under the action of the first control signal of the control circuit so as to transmit the first control signal to the filtering module.

[0015] In one exemplary embodiment, the first switching module further includes a first capacitor;

[0016] The first terminal of the first capacitor is connected to the third terminal of the first switching unit and the first power supply, respectively, and the second terminal of the first capacitor is connected to the ground terminal.

[0017] In one exemplary embodiment, the first filtering module includes a first resistor and a second capacitor;

[0018] The first end of the first resistor is connected to the second end of the first switch module, and the second end of the first resistor is connected to the first end of the second capacitor and the filter module respectively.

[0019] The second terminal of the second capacitor is connected to ground.

[0020] In one exemplary embodiment, the second filtering module includes a second resistor and a third capacitor;

[0021] The first end of the second resistor is connected to the second end of the second switch module, and the second end of the second resistor is connected to the first end of the third capacitor and the filter module respectively.

[0022] The second terminal of the third capacitor is connected to ground.

[0023] In one exemplary embodiment, the driving circuit further includes a third filtering module and a fourth filtering module;

[0024] The third filtering module is connected to the first terminal of the control circuit and the first terminal of the first switching module, respectively.

[0025] The fourth filter module is connected to the second terminal of the control circuit and the first terminal of the second switch module, respectively.

[0026] The third filtering module is used to receive the first initial control signal from the control circuit; filter the first initial control signal to obtain the first control signal; and transmit the first control signal to the first switching module.

[0027] The fourth filtering module is used to receive the second initial control signal from the control circuit; filter the second initial control signal to obtain the second control signal; and transmit the second control signal to the second switching module.

[0028] In one exemplary embodiment, the first switching module includes a P-type MOS transistor.

[0029] In one exemplary embodiment, the second switching module includes an N-type MOSFET.

[0030] In a second aspect, embodiments of this application provide a camera, including a control circuit, a lens, and a driving circuit as described in any of the first aspects of this application. The lens includes a filter module, and the filter module includes a first filter and a second filter.

[0031] The drive circuit is connected to the control circuit and the filter module respectively;

[0032] The control circuit is used to transmit the first control signal and the third control signal to the drive circuit;

[0033] The lens is used to switch from the first filter to the second filter under the driving action of the second control signal and the fourth control signal; and to perform imaging based on the second filter.

[0034] In one exemplary embodiment, the control circuit includes a first control port, a second control port, and a power supply port;

[0035] The power port is connected to the second power source; the first control port of the control circuit is connected to the first switch module in the drive circuit, and the second control port of the control circuit is connected to the second switch module in the drive circuit.

[0036] The control circuit is used to transmit a first control signal to the drive circuit through a first control port and a third control signal to the drive circuit through a second control port.

[0037] The aforementioned driving circuit, through the cooperation of the first switching module, the first filtering module, the second switching module, and the second filtering module, can provide a large driving capability to the filter module, enabling the filter module to switch from the first filter to the second filter. Thus, the driving circuit can replace the traditional filter driving chip, eliminating the need for the control circuit that needs to switch filters to be connected to a dedicated driving chip for the filter module. In other words, the driving circuit provided by this application embodiment can provide a high driving capability to the filter module, eliminating the need for a dedicated filter driving chip in the camera, thereby reducing the manufacturing cost of the camera. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0039] Figure 1 This is a schematic diagram of a driving circuit provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of another driving circuit provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of another driving circuit provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of another driving circuit provided in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of another camera provided in an embodiment of this application. Detailed Implementation

[0044] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0046] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0047] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0048] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0049] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0050] like Figure 1 As shown, one embodiment of the driving circuit 10 includes:

[0051] The system comprises a first switch module 102, a first filter module 104, a second switch module 106, and a second filter module 108.

[0052] The first terminal of the first switch module 102 is connected to the first terminal of the control circuit, the second terminal of the first switch module 102 is connected to the first terminal of the first filter module 104, and the third terminal of the first switch module 102 is connected to the first power supply; the second terminal of the first filter module 104 is connected to the filter module in the lens; the filter module includes a first filter and a second filter.

[0053] The first terminal of the second switch module 106 is connected to the second terminal of the control circuit, the second terminal of the second switch module 106 is connected to the first terminal of the second filter module 108, and the third terminal of the second switch module 106 is connected to the ground terminal; the second terminal of the second filter module 108 is connected to the filter module.

[0054] The first switch module 102 is used to be turned on under the action of the first control signal of the control circuit so as to transmit the first control signal to the first filter module 104.

[0055] The first filtering module 104 is used to filter the first control signal to obtain the second control signal; and to transmit the second control signal to the filter module.

[0056] The second switch module 106 is used to be turned on under the action of the third control signal of the control circuit so as to transmit the third control signal to the second filter module 108.

[0057] The second filtering module 108 is used to filter the third control signal to obtain a fourth control signal; and transmit the fourth control signal to the filter module so that the filter module switches from the first filter to the second filter under the driving action of the second control signal and the fourth control signal.

[0058] The control circuit may include a system-on-a-chip (SOC). Optionally, the SOC included in the control circuit may be a T23 chip.

[0059] A lens refers to the component in a camera used for imaging. Optionally, the camera to which the lens is applied can be a network camera (IP camera, IPC), which refers to a camera that transmits images and videos over a network.

[0060] Optionally, the voltage of the first power supply can correspond to the rated voltage of the filter module. For example, the first power supply can be a 3.3V power supply.

[0061] The filter module refers to the infrared cut-off (IR-CUT) switch in the lens. The filter module includes an infrared cut-off filter and a fully transparent filter. The infrared cut-off filter is suitable for well-lit environments, such as daytime use; the fully transparent filter is suitable for low-light environments, such as nighttime use, to improve sensitivity to infrared light.

[0062] The first filter and the second filter are one of an infrared cut-off filter and a fully transparent filter, respectively.

[0063] Optionally, the first filter is an infrared cutoff filter.

[0064] Optionally, the second filter is a fully transparent filter.

[0065] Since the second control signal is obtained by filtering the first control signal, and filtering can remove high-frequency signals from the circuit board and interference from the external environment from the first control signal, the second control signal has higher signal integrity than the first control signal. Similarly, the fourth control signal has higher signal integrity than the second control signal.

[0066] Under the influence of the second and fourth control signals, the filter module receives an energizing signal with the same voltage value as the power supply signal of the first power source. This energizing signal drives the filter module to switch from the first filter to the second filter. In other words, when the filter module switches from the first filter to the second filter, the voltage value of the filter module is the same as the voltage value of the first power source.

[0067] For example, when the first power supply is 3.3V, the voltage value of the filter module is the same as the voltage value of the first power supply under the action of the second control signal and the fourth control signal, that is, the voltage value of the filter module is 3.3V at this time.

[0068] The aforementioned driving circuit, through the cooperation of the first switching module, the first filtering module, the second switching module, and the second filtering module, can provide a large driving capability to the filter module, enabling the filter module to switch from the first filter to the second filter. Thus, the driving circuit can replace the traditional filter driving chip, eliminating the need for the control circuit that needs to switch filters to be connected to a dedicated driving chip for the filter module. In other words, the driving circuit provided by this application embodiment can provide a high driving capability to the filter module, eliminating the need for a dedicated filter driving chip in the camera, thereby reducing the manufacturing cost of the camera.

[0069] In a straightforward manner, the drive circuit 10 can provide a high driving capability for the filter module, while also improving the stability of the filter module's switching capability from the first filter to the second filter.

[0070] In an exemplary embodiment, the first filtering module 104 is specifically used to transmit the second control signal to the first signal port of the filter module.

[0071] In one exemplary embodiment, the second filtering module 108 is specifically used to transmit the fourth control signal to the second signal port of the filter module.

[0072] In an exemplary embodiment, when the first control signal is a high-level signal, the first switch module 102 is turned off; when the first control signal is a low-level signal, the first switch module 102 is turned on.

[0073] In one exemplary embodiment, the second switch module 106 is turned on when the second control signal is a high-level signal, and turned off when the second control signal is a low-level signal.

[0074] In one exemplary embodiment, the level type of the first control signal and the level type of the second control signal are opposite.

[0075] The level types of the first control signal and the second control signal are opposite, meaning that when the first control signal is a high-level signal, the second control signal is a low-level signal; conversely, when the first control signal is a low-level signal, the second control signal is a high-level signal.

[0076] Because the level types of the first control signal and the second control signal are opposite, the first switch module 102 and the second switch module 106 are simultaneously in a conducting state or simultaneously in a turning-off state. That is to say, the operating state of the first switch module 102 and the operating state of the second switch module 106 are the same. The operating state includes a conducting state and a turning-off state.

[0077] In one exemplary embodiment, such as Figure 2 As shown, the first switch module 102 includes a first switch unit 1022.

[0078] The first terminal of the first switching unit 1022 is connected to the first terminal of the control circuit, the second terminal of the first switching unit 1022 is connected to the first terminal of the first filter module 104, and the third terminal of the first switching unit 1022 is connected to the first power supply.

[0079] The first switching unit 1022 is used to be turned on under the action of the first control signal of the control circuit so as to transmit the first control signal to the filtering module.

[0080] The type of the first switch unit 1022 is different from that of the second switch unit 1062. That is to say, the first control signal and the second control signal provided by the control circuit are different. Therefore, the first control signal and the second control signal need to be responded to by the first switch unit 1022 and the second switch unit 1062 of different types respectively.

[0081] In one exemplary embodiment, such as Figure 2 As shown, the first switching module 102 includes a P-type MOSFET Q1.

[0082] Since the first switch module 102 includes a first switch unit 1022, it can be understood that the first switch unit 1022 includes a P-type MOS transistor Q1.

[0083] When the first switching unit 102 includes a P-type MOS transistor Q1, the first terminal of the first switching unit 1022 is the gate, the second terminal of the first switching unit 1022 is the source, and the third terminal of the first switching unit 1022 is the drain.

[0084] When the first control signal is a high-level signal, the first switch unit 1022 is turned off; when the first control signal is a low-level signal, the first switch unit 1022 is turned on.

[0085] In one exemplary embodiment, such as Figure 2 As shown, the first switch module 102 also includes a first capacitor C1.

[0086] The first terminal of the first capacitor C1 is connected to the third terminal of the first switching unit 1022 and the first power supply, respectively, and the second terminal of the first capacitor C1 is connected to the ground terminal.

[0087] Among them, the first capacitor C1 is the voltage regulator capacitor corresponding to the first power supply, which can enhance the stability of the first power supply signal transmitted from the first power supply to the drive circuit 10.

[0088] Optionally, the capacitance value of the first capacitor C1 can be 0.1μF.

[0089] In this embodiment, the first switching module includes a first switching unit and a first capacitor. Thus, the first capacitor can play a role in voltage stabilization and filtering, and can improve the signal integrity of the first control signal transmitted from the first switching unit to the first filtering module, thereby improving the driving capability of the first control signal for the filter module.

[0090] In one exemplary embodiment, the second switch module 106 includes a second switch unit 1062.

[0091] The first terminal of the second switching unit 1062 is connected to the second terminal of the control circuit, the second terminal of the second switching unit 1062 is connected to the first terminal of the second filter module 108, and the third terminal of the second switching unit 1062 is connected to the ground terminal.

[0092] The second switching unit 1062 is used to be turned on under the action of the third control signal of the control circuit so as to transmit the third control signal to the second filtering module 108.

[0093] In one exemplary embodiment, such as Figure 2 As shown, the second switching module 106 includes an N-type MOSFET Q2.

[0094] Since the second switching module 106 includes a second switching unit 1062, it can be understood that the second switching unit 1062 includes an N-type MOS transistor Q2.

[0095] When the second switching unit 1062 includes an N-type MOS transistor Q2, the first terminal of the second switching unit 1062 is the gate, the second terminal of the second switching unit 1062 is the source, and the third terminal of the second switching unit 1062 is the drain.

[0096] In one exemplary embodiment, such as Figure 2 As shown, the first filter module 104 includes a first resistor R1 and a second capacitor C2.

[0097] The first end of the first resistor R1 is connected to the second end of the first switch module 102, and the second end of the first resistor R1 is connected to the first end of the second capacitor C2 and the filter module respectively.

[0098] The second terminal of the second capacitor C2 is connected to ground.

[0099] Optionally, the resistance value of the first resistor R1 can be 1KΩ.

[0100] Optionally, the capacitance value of the second capacitor C2 can be 1μF.

[0101] In one exemplary embodiment, such as Figure 2 As shown, the second filter module 108 includes a second resistor R2 and a third capacitor C3.

[0102] The first end of the second resistor R2 is connected to the second end of the second switch module 106, and the second end of the second resistor R2 is connected to the first end of the third capacitor C3 and the filter module respectively.

[0103] The second terminal of the third capacitor C3 is connected to ground.

[0104] The resistance value of the second resistor R2 can be the same as or different from that of the first resistor R1.

[0105] Optionally, the resistance value of the second resistor R2 can be 1KΩ.

[0106] The capacitance value of the third capacitor C3 can be the same as or different from that of the second capacitor C2.

[0107] Optionally, the capacitance value of the third capacitor C3 can be 1μF.

[0108] In this embodiment, the first filtering module includes a first resistor and a second capacitor, and the second filtering module includes a second resistor and a third capacitor. Thus, the combination of resistors and capacitors forms a low-pass filter, which can filter out high-frequency signals from the circuit board and interference from the external environment in the first and third control signals, so as to ensure that the second and fourth control signals transmitted to the filter module have high signal integrity and high driving capability, and can ensure that the filter module can smoothly switch from the first filter to the second filter.

[0109] In one exemplary embodiment, such as Figure 3 As shown, the driving circuit 10 also includes a third filtering module 110 and a fourth filtering module 112.

[0110] The third filter module 110 is connected to the first terminal of the control circuit and the first terminal of the first switch module 102, respectively.

[0111] The fourth filter module 112 is connected to the second terminal of the control circuit and the first terminal of the second switch module 106, respectively.

[0112] The third filtering module 110 is used to receive the first initial control signal from the control circuit; filter the first initial control signal to obtain the first control signal; and transmit the first control signal to the first switching module 102.

[0113] The fourth filtering module 112 is used to receive the second initial control signal from the control circuit; filter the second initial control signal to obtain the second control signal; and transmit the second control signal to the second switching module 106.

[0114] Since the first control signal is obtained by filtering the first initial control signal, and filtering can remove high-frequency signals from the circuit board and interference from the external environment from the first initial control signal, the first control signal has higher signal integrity than the first initial control signal. Similarly, the second control signal has higher signal integrity than the second initial control signal.

[0115] In one exemplary embodiment, such as Figure 4 As shown, the third filter module 110 includes a fourth capacitor C4.

[0116] The first terminal of the fourth capacitor C4 is connected to both the first terminal of the control circuit and the first terminal of the first switch module 102. The second terminal of the fourth capacitor C4 is connected to ground.

[0117] In one exemplary embodiment, the fourth filtering module 112 includes a fifth capacitor C5.

[0118] The first terminal of the fifth capacitor C5 is connected to the second terminal of the control circuit and the first terminal of the second switch module 106. The second terminal of the fifth capacitor C5 is connected to ground.

[0119] Among them, the fourth capacitor C4 and the fifth capacitor C5 are filter capacitors, respectively.

[0120] Optionally, the capacitance value of the fourth capacitor C4 can be the same as or different from that of the fifth capacitor C5.

[0121] Optionally, the capacitance value of the fourth capacitor C4 can be 1μF.

[0122] Optionally, the capacitance value of the fifth capacitor C5 can be 1μF.

[0123] In this embodiment, the driving circuit further includes a third filtering module corresponding to the first switching module and a fourth filtering module corresponding to the second switching module. This allows for the filtering out high-frequency signals from the circuit board and interference from the external environment in the first and second initial control signals, ensuring that both the first control signal transmitted to the first switching module and the second control signal transmitted to the second switching module have high signal integrity and high driving capability. This further ensures that both the second and fourth control signals transmitted to the filter module have high driving capability, thereby ensuring that the filter module can smoothly switch from the first filter to the second filter.

[0124] The application process of the above-mentioned driving circuit 10 will be illustrated below with a detailed embodiment:

[0125] like Figure 4 As shown, the driving circuit 10 includes a first switching module 102, a first filtering module 104, a second switching module 106, a second filtering module 108, a third filtering module 110, and a fourth filtering module 112.

[0126] The first switching module 102 includes a P-type MOSFET Q1 and a first capacitor C1; the first filtering module 104 includes a first resistor R1 and a second capacitor C2; the second switching module 106 includes an N-type MOSFET Q2; the second filtering module 108 includes a second resistor R2 and a third capacitor C3; the third filtering module 110 includes a fourth capacitor C4; and the fourth filtering module 112 includes a fifth capacitor C5.

[0127] The gate of the P-type MOSFET Q1 is connected to the first terminal of the control circuit and the first terminal of the fourth capacitor C4, respectively. The source of the P-type MOSFET Q1 is connected to the first resistor R1, and the drain of the P-type MOSFET Q1 is connected to the first power supply and the first terminal of the first capacitor C1.

[0128] The second end of the first resistor R1 is connected to the filter module in the lens and the first end of the second capacitor C2, respectively.

[0129] The gate of the N-type MOSFET Q2 is connected to the second terminal of the control circuit and the first terminal of the fifth capacitor C5, respectively. The source of the N-type MOSFET Q2 is connected to the first terminal of the second resistor R2, and the drain of the N-type MOSFET Q2 is connected to the ground terminal.

[0130] The second end of the second resistor R2 is connected to the filter module and the first end of the third capacitor C3, respectively.

[0131] The second terminals of the first capacitor C1, the second capacitor C2, the fourth capacitor C4, and the fifth capacitor C5 are respectively grounded.

[0132] When it is necessary to switch the filter module from the first filter to the second filter, the first terminal of the control circuit outputs a first initial control signal. This first initial control signal is filtered by the fourth capacitor C4 to form a second control signal, which is then transmitted to the P-type MOSFET Q1. The second terminal of the control circuit outputs a second initial control signal. This second initial control signal is filtered by the fifth capacitor C5 to form a second control signal, which is then transmitted to the N-type MOSFET Q2. Under the influence of the low-level first control signal, the P-type MOSFET Q1 is turned on; under the influence of the high-level second control signal, the N-type MOSFET Q2 is turned on. Thus, a power-on loop is formed between the control circuit, the drive circuit 10, and the filter module. The voltage value of the filter at this time is the same as the voltage value of the first power supply. Based on this, the filter module can be turned on and enter the working state, switching from the first filter to the second filter.

[0133] Conversely, when it is necessary to turn off the filter module to switch from the second filter to the first filter, the P-type MOSFET Q1 receives a high-level signal, and the N-type MOSFET Q2 receives a low-level signal. Under the action of the high-level signal, the P-type MOSFET Q1 turns off, and under the action of the low-level signal, the N-type MOSFET Q2 turns off. Thus, the filter module cannot receive a power-on signal with the same voltage value as the first power supply. Therefore, the filter module is turned off to switch from the second filter to the first filter.

[0134] In this embodiment, the filter module can be provided with a large driving capability through the cooperation of the first switch module, the first filter module, the second switch module, the second filter module, the third filter module, and the fourth filter module. This enables the filter module to switch from the first filter to the second filter. Thus, the driving circuit can replace the traditional filter driver chip, so the control circuit no longer needs to be connected to the filter driver chip. It only needs to be connected to the driving circuit provided in this embodiment to realize the filter switching action. That is to say, the driving circuit provided in this embodiment can provide a high driving capability for the filter module. There is no need to set up a dedicated filter driver chip in the camera, thereby reducing the manufacturing cost of the camera.

[0135] It is understood that the above-mentioned driving circuit can also take other forms, and is not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of providing high driving capability to the filter module.

[0136] In one exemplary embodiment, a camera is also provided, such as Figure 5 As shown, the camera includes a control circuit 20, a lens 30, and a drive circuit 10 as described in any of the above-described drive circuit 10 embodiments. The lens 30 includes a filter module 302, which includes a first filter and a second filter.

[0137] The drive circuit 10 is connected to the control circuit 20 and the filter module 302 respectively.

[0138] The control circuit 20 is used to transmit the first control signal and the third control signal to the drive circuit 10.

[0139] Lens 30 is used to switch from the first filter to the second filter under the driving action of the second control signal and the fourth control signal; and to perform imaging based on the second filter.

[0140] The second control signal is obtained by filtering the first control signal through the drive circuit 10; that is, the second control signal corresponds to the first control signal. Similarly, the fourth control signal is obtained by filtering the third control signal through the drive circuit 10; that is, the fourth control signal corresponds to the third control signal.

[0141] In an exemplary embodiment, the control circuit 20 includes a first control port 20a, a second control port 20b, and a power port 20c.

[0142] Power port 20c is connected to a second power source; the first control port 20a of the control circuit 20 is connected to the first switch module in the drive circuit 10, and the second control port 20b of the control circuit 20 is connected to the second switch module in the drive circuit 10.

[0143] The control circuit 20 is used to transmit a first control signal to the drive circuit 10 through the first control port 20a and a third control signal to the drive circuit 10 through the second control port 20b.

[0144] Optionally, when the first filter is an infrared cutoff filter and the second filter is a fully transparent filter, the control circuit 20 is specifically used to transmit a first control signal to the drive circuit 10 through the first control port 20a and a second control signal to the drive circuit 10 through the second control port 20b when the ambient light intensity is less than or equal to the preset light intensity.

[0145] If the ambient light intensity is less than or equal to the preset light intensity, it indicates that the camera is in a low-light environment, such as at night. Therefore, it is necessary to improve the image quality by using a fully transparent filter that is more sensitive to light.

[0146] Conversely, when the first filter is a fully transparent filter and the second filter is an infrared cutoff filter, the control circuit 20 is specifically used to transmit a first control signal to the drive circuit 10 through the first control port 20a and a second control signal to the drive circuit 10 through the second control port 20b when the ambient light intensity is greater than the preset light intensity.

[0147] Optionally, the control circuit 20 can determine the ambient light intensity by using the resistance value of the photoresistor.

[0148] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0149] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0150] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A driving circuit, characterized in that, The driving circuit includes: The system comprises a first switching module, a first filtering module, a second switching module, and a second filtering module; The first terminal of the first switch module is connected to the first terminal of the control circuit, the second terminal of the first switch module is connected to the first terminal of the first filter module, and the third terminal of the first switch module is connected to the first power supply; the second terminal of the first filter module is connected to the filter module in the lens; the filter module includes a first filter and a second filter; The first terminal of the second switch module is connected to the second terminal of the control circuit, the second terminal of the second switch module is connected to the first terminal of the second filter module, and the third terminal of the second switch module is connected to ground; the second terminal of the second filter module is connected to the filter module. The first switch module is used to be turned on under the action of the first control signal of the control circuit so as to transmit the first control signal to the first filter module; The first filtering module is used to filter the first control signal to obtain a second control signal; and to transmit the second control signal to the filter module. The second switching module is used to be turned on under the action of the third control signal of the control circuit so as to transmit the third control signal to the second filtering module; The second filtering module is used to filter the third control signal to obtain a fourth control signal; and to transmit the fourth control signal to the filter module so that the filter module switches from the first filter to the second filter under the driving action of the second control signal and the fourth control signal.

2. The driving circuit according to claim 1, characterized in that, The first switch module includes a first switch unit; The first terminal of the first switching unit is connected to the first terminal of the control circuit, the second terminal of the first switching unit is connected to the first terminal of the first filtering module, and the third terminal of the first switching unit is connected to the first power supply. The first switching unit is configured to be turned on under the action of the first control signal of the control circuit, so as to transmit the first control signal to the filtering module.

3. The driving circuit according to claim 2, characterized in that, The first switching module also includes a first capacitor; The first terminal of the first capacitor is connected to the third terminal of the first switching unit and the first power supply, respectively, and the second terminal of the first capacitor is connected to the ground terminal.

4. The driving circuit according to claim 1, characterized in that, The first filtering module includes a first resistor and a second capacitor; The first end of the first resistor is connected to the second end of the first switch module, and the second end of the first resistor is connected to the first end of the second capacitor and the filter module, respectively. The second terminal of the second capacitor is connected to ground.

5. The driving circuit according to claim 1, characterized in that, The second filter module includes a second resistor and a third capacitor; The first end of the second resistor is connected to the second end of the second switch module, and the second end of the second resistor is connected to the first end of the third capacitor and the filter module respectively. The second terminal of the third capacitor is connected to ground.

6. The driving circuit according to claim 1, characterized in that, The driving circuit also includes a third filtering module and a fourth filtering module; The third filtering module is connected to the first terminal of the control circuit and the first terminal of the first switching module, respectively. The fourth filter module is connected to the second terminal of the control circuit and the first terminal of the second switch module, respectively. The third filtering module is used to receive a first initial control signal from the control circuit; filter the first initial control signal to obtain the first control signal; and transmit the first control signal to the first switching module. The fourth filtering module is used to receive the second initial control signal from the control circuit; The second initial control signal is filtered to obtain the second control signal; the second control signal is then transmitted to the second switching module.

7. The driving circuit according to claim 1, characterized in that, The first switching module includes a P-type MOSFET.

8. The driving circuit according to claim 1, characterized in that, The second switching module includes an N-type MOSFET.

9. A camera, characterized in that, It includes a control circuit, a lens, and a driving circuit as described in any one of claims 1-8, wherein the lens includes a filter module, and the filter module includes a first filter and a second filter; The driving circuit is connected to the control circuit and the filter module respectively; The control circuit is used to transmit a first control signal and a third control signal to the drive circuit; The lens is used to switch from the first filter to the second filter under the driving action of the second control signal and the fourth control signal; Imaging is performed based on the second filter.

10. The camera according to claim 9, characterized in that, The control circuit includes a first control port, a second control port, and a power supply port; The power port is connected to a second power source; the first control port of the control circuit is connected to the first switch module in the drive circuit, and the second control port of the control circuit is connected to the second switch module in the drive circuit. The control circuit is used to transmit the first control signal to the drive circuit through the first control port and the third control signal to the drive circuit through the second control port.

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