Conversion circuit, control device and lamp

Abstract

The utility model discloses a conversion circuit, a control device and a lamp, the conversion circuit comprises a first conversion circuit and a second conversion circuit, the output end of the first conversion circuit is connected with the input end of the second conversion circuit, and the input end of the first conversion circuit is the input end of the conversion circuit. The output end of the first conversion circuit is the first output end of the conversion circuit, and the output end of the second conversion circuit is the second output end of the conversion circuit; the first conversion circuit is used for converting the first direct-current electric signal into a second direct-current electric signal, and the voltage of the first direct-current electric signal is larger than that of the second direct-current electric signal; the second conversion circuit is used for converting the second direct-current electric signal into a third direct-current electric signal, and the voltage of the second direct-current electric signal is larger than that of the third direct-current electric signal. According to the embodiment of the invention, loads needing different power supply voltages can be met.

Description

Technical Field

[0001] This application relates to the technical field of electronic circuits, and particularly relates to a conversion circuit, a control device, and a lamp. Background Art

[0002] In electronic devices and power systems, voltage conversion technology plays a crucial role. A DC-DC converter can provide a single conversion path and a fixed conversion ratio. To achieve efficient and flexible voltage conversion, a power supply can convert an input voltage into a fixed voltage output through a DC-DC converter. However, traditional power conversion can only provide a single voltage conversion, so it is impossible to supply power to loads that require different supply voltages respectively. Summary of the Utility Model

[0003] Embodiments of this application disclose a conversion circuit, a control device, and a lamp, which are used to convert an input voltage into output voltages of different voltages and can meet loads that require different supply voltages.

[0004] In a first aspect, embodiments of this application disclose a conversion circuit, including a first conversion circuit and a second conversion circuit, where:

[0005] The output end of the first conversion circuit is connected to the input end of the second conversion circuit. The input end of the first conversion circuit is the input end of the conversion circuit, the output end of the first conversion circuit is the first output end of the conversion circuit, and the output end of the second conversion circuit is the second output end of the conversion circuit;

[0006] The first conversion circuit is used to convert a first DC electrical signal into a second DC electrical signal, and the voltage of the first DC electrical signal is greater than the voltage of the second DC electrical signal;

[0007] The second conversion circuit is used to convert the second DC electrical signal into a third DC electrical signal, and the voltage of the second DC electrical signal is greater than the voltage of the third DC electrical signal.

[0008] In a second aspect, embodiments of this application disclose a control device, including a Bluetooth circuit, a driving circuit, and the above-mentioned conversion circuit, where:

[0009] The first end of the Bluetooth circuit is connected to the second output end of the conversion circuit, the second end of the Bluetooth circuit is connected to the signal input end of the driving circuit, the power input end of the driving circuit is connected to the first output end of the conversion circuit, and the output end of the driving circuit is connected to a light-emitting device;

[0010] The conversion circuit is used to supply power to the Bluetooth circuit and the driving circuit;

[0011] The Bluetooth circuit is used to receive a first control signal and send the first control signal to the driving circuit;

[0012] A driving circuit for controlling the lighting state of a lighting device according to a first control signal.

[0013] In a third aspect, an embodiment of the present application discloses a lighting fixture, including a lighting device and the above control device.

[0014] In the embodiment of the present application, the conversion circuit includes a first conversion circuit and a second conversion circuit, where: the output end of the first conversion circuit is connected to the input end of the second conversion circuit, the input end of the first conversion circuit is the input end of the conversion circuit, the output end of the first conversion circuit is the first output end of the conversion circuit, and the output end of the second conversion circuit is the second output end of the conversion circuit; the first conversion circuit is used to convert a first direct current signal into a second direct current signal, and the voltage of the first direct current signal is greater than the voltage of the second direct current signal; the second conversion circuit is used to convert the second direct current signal into a third direct current signal, and the voltage of the second direct current signal is greater than the voltage of the third direct current signal. The conversion circuit includes a first conversion circuit and a second conversion circuit. The input end of the first conversion circuit is the input end of the conversion circuit, and the output end of the first conversion circuit is the first output end of the conversion circuit. It can be seen that the first conversion circuit is both the input port of the entire conversion circuit and provides an intermediate output voltage, that is, the first conversion circuit can not only provide the voltage conversion in the first stage, but also provide an available output voltage for the outside. The output end of the second conversion circuit is the second output end of the conversion circuit. It can be seen that the second conversion circuit can be used as the second output end of the entire conversion circuit and can provide the final output voltage. The present application can provide different voltage outputs through the first conversion circuit and the second conversion circuit. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a control device disclosed in an embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of a conversion circuit disclosed in an embodiment of the present application;

[0018] Figure 3 It is a schematic structural diagram of a first conversion circuit disclosed in an embodiment of the present application;

[0019] Figure 4 It is a schematic structural diagram of another first conversion circuit disclosed in an embodiment of the present application;

[0020] Figure 5 It is a schematic structural diagram of a second conversion circuit disclosed in an embodiment of the present application;

[0021] Figure 6 It is a schematic structural diagram of another second conversion circuit disclosed in an embodiment of the present application;

[0022] Figure 7 It is a schematic structural diagram of another control device disclosed in an embodiment of the present application;

[0023] Figure 8 It is a schematic structural diagram of a driving circuit disclosed in an embodiment of the present application;

[0024] Figure 9 It is a schematic structural diagram of another driving circuit disclosed in an embodiment of the present application;

[0025] Figure 10 It is a schematic structural diagram of yet another driving circuit disclosed in an embodiment of the present application;

[0026] Figure 11 It is a schematic structural diagram of yet another driving circuit disclosed in an embodiment of the present application;

[0027] Figure 12 It is a schematic structural diagram of yet another control device disclosed in an embodiment of the present application;

[0028] Figure 13 It is a schematic structural diagram of a lamp disclosed in an embodiment of the present application. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0030] The embodiments of the present application disclose a conversion circuit, a control device and a lamp, which are used to convert an input voltage into an output voltage of different voltages and can meet loads that require different supply voltages. The following will be described in detail respectively.

[0031] To better understand the embodiments of the present application, the related technologies of the embodiments of the present application will be described below first.

[0032] Please refer to Figure 1 , Figure 1 It is a schematic structural diagram of a control device disclosed in an embodiment of the present application. As Figure 1As shown, the control device may include a conversion circuit, a drive circuit, and a Bluetooth circuit. The conversion circuit can convert the voltage of the power supply into the voltage required by the drive circuit to supply power to the drive circuit. At the same time, it can also supply power to the Bluetooth circuit connected to the drive circuit. However, as a low-power device, the Bluetooth circuit may require a relatively low voltage (such as 3.3V or 5V), while the drive circuit may require a higher voltage to provide sufficient current to drive the actuator. Therefore, it is difficult for the output voltage of the conversion circuit to satisfy both the Bluetooth circuit and the drive circuit at the same time. For the drive circuit, too low a voltage will cause the drive circuit to be unable to provide sufficient current to the actuator, resulting in insufficient performance; for the Bluetooth circuit, too high a voltage will damage the Bluetooth module.

[0033] To solve the above problems, this application designs a conversion circuit that can convert the input voltage into output voltages of different voltages to meet the loads that require different supply voltages.

[0034] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a conversion circuit disclosed in an embodiment of this application. As Figure 2 shown, the conversion circuit may include a first conversion circuit and a second conversion circuit.

[0035] The output end of the first conversion circuit is connected to the input end of the second conversion circuit. The input end of the first conversion circuit is the input end of the conversion circuit, the output end of the first conversion circuit is the first output end of the conversion circuit, and the output end of the second conversion circuit is the second output end of the conversion circuit.

[0036] The input end of the first conversion circuit can receive a first direct current signal. Then, the first conversion circuit can convert the first direct current signal into a second direct current signal to provide the second direct current signal for the first load connected to the output end of the first conversion circuit. Among them, the voltage of the first direct current signal is greater than the voltage of the second direct current signal. Further, the output end of the first conversion circuit is connected to the input end of the second conversion circuit. The input end of the second conversion circuit can receive the second direct current signal. Then, the second conversion circuit can convert the second direct current signal into a third direct current signal to provide the third direct current signal for the second load connected to the output end of the second conversion circuit. The voltage of the second direct current signal is greater than the voltage of the third direct current signal. The conversion circuit can convert the received direct current signal with a higher voltage into two direct current signals with lower voltages of different voltages, and can provide different voltage outputs according to needs, and can be applicable to multiple loads that require different voltage supplies.

[0037] The first load and the second load can be the same type of electronic device or component, or different types of electronic devices or components.

[0038] It should be understood that the connections in this application can be electrical connections.

[0039] In Figure 2 the described conversion circuit, it includes a first conversion circuit and a second conversion circuit, where: the output terminal of the first conversion circuit is connected to the input terminal of the second conversion circuit, the input terminal of the first conversion circuit is the input terminal of the conversion circuit, the output terminal of the first conversion circuit is the first output terminal of the conversion circuit, and the output terminal of the second conversion circuit is the second output terminal of the conversion circuit; the first conversion circuit is used to convert a first direct current signal into a second direct current signal, and the voltage of the first direct current signal is greater than the voltage of the second direct current signal; the second conversion circuit is used to convert the second direct current signal into a third direct current signal, and the voltage of the second direct current signal is greater than the voltage of the third direct current signal. The conversion circuit includes a first conversion circuit and a second conversion circuit. The input terminal of the first conversion circuit is the input terminal of the conversion circuit, and the output terminal of the first conversion circuit is the first output terminal of the conversion circuit. It can be seen that the first conversion circuit is both the input port of the entire conversion circuit and provides an intermediate output voltage. That is, the first conversion circuit can not only provide the voltage conversion in the first stage but also provide an available output voltage for the outside. The output terminal of the second conversion circuit is the second output terminal of the conversion circuit. It can be seen that the second conversion circuit can be used as the second output terminal of the entire conversion circuit and can provide the final output voltage. This application can provide different voltage outputs through the first conversion circuit and the second conversion circuit.

[0040] It should be understood that when voltage conversion is required between two devices, there can be one conversion circuit or multiple conversion circuits between them.

[0041] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a first conversion circuit disclosed in an embodiment of this application. As Figure 3 shown, the first conversion circuit can include a first conversion module, a second conversion module, and a third conversion module.

[0042] The input terminal of the first conversion module is connected to the first input terminal of the second conversion module, the output terminal of the first conversion module is connected to the second input terminal of the second conversion module, the output terminal of the second conversion module is connected to the input terminal of the third conversion module, the output terminal of the third conversion module is connected to the second conversion circuit, and the input terminal of the first conversion module is the input terminal of the first conversion circuit.

[0043] The first conversion module can convert a first direct current signal into a fourth direct current signal, and the voltage of the first direct current signal is greater than the voltage of the fourth direct current signal.

[0044] The second conversion module can convert the fourth direct current signal into a fifth direct current signal, and the voltage of the fourth direct current signal is greater than the voltage of the fifth direct current signal.

[0045] The third conversion module can convert the fifth DC signal into the second DC signal, and the voltage of the fifth DC signal is greater than that of the second DC signal.

[0046] In Figure 3 In the described first conversion circuit, the first conversion module can be a voltage dividing module, which can be composed of components such as resistors or zener diodes, and can reduce the input voltage (the first DC signal) to a lower level (the fourth DC signal). The second conversion module can further reduce the voltage (from the fourth DC signal to the fifth DC signal). The third conversion module can adjust the voltage to the level required by the second conversion circuit (the second DC signal). The first conversion circuit can provide a stable power supply for the load connected to the first conversion circuit and the second conversion circuit through step-by-step voltage reduction and voltage stabilization processing, ensuring that the backend circuit can operate at the optimal voltage, thereby improving the performance and reliability of the overall system.

[0047] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of another first conversion circuit disclosed in the embodiments of the present application. Among them, Figure 4 The first conversion circuit shown is optimized from the first conversion circuit shown in Figure 3 As shown in Figure 4 the first conversion module can include a first resistor R1, a second resistor R2, and a first capacitor C1.

[0048] One end of the first resistor R1 is connected to the first input terminal of the second conversion module, and the other end of the first resistor R1 is respectively connected to one end of the second resistor R2, one end of the first capacitor C1, and the second input terminal of the second conversion module. The other ends of the second resistor R2 and the first capacitor C1 are respectively grounded, and one end of the first resistor R1 is the input terminal of the first conversion module.

[0049] The first resistor R1 and the second resistor R2 can form a voltage divider to reduce the DC voltage at the power input terminal and reduce the DC voltage at the power input terminal to a predetermined lower level.

[0050] The first capacitor C1 can form a filtering network with the second resistor R2 to help stabilize the output voltage.

[0051] As shown in Figure 4 the second conversion module can include a first conversion unit, a first inductor L1, and a second capacitor C2.

[0052] The first end and the second end of the first conversion unit are respectively connected to the first conversion module. The third end of the first conversion unit is respectively connected to one end of the first inductor L1 and one end of the second capacitor C2. The other end of the first inductor L1 is connected to the first input end of the third conversion module. The fourth end of the first conversion unit is connected to the other end of the second capacitor C2. The fifth end of the first conversion unit is connected to the second input end of the third conversion module.

[0053] The first conversion unit can convert the fourth direct current signal into a fifth direct current signal.

[0054] Exemplarily, the first conversion unit can be a buck switching regulator. The model of the buck switching regulator can be PL88104, or other models with the same function.

[0055] As Figure 4 shown, the third conversion module can include a third resistor R3, a fourth resistor R4, and a third capacitor C3.

[0056] Both ends of the third resistor R3 are respectively connected to the two output ends of the second conversion module. The third capacitor C3 is connected in parallel with the third resistor R3. One end of the third capacitor C3 is connected to the second conversion circuit. The other end of the third capacitor C3 is grounded through the fourth resistor R4.

[0057] The third resistor R3, the fourth resistor R4, and the ground terminal can form a voltage divider, which can fine-tune the voltage to ensure that a suitable voltage can be output.

[0058] The third resistor R3 and the third capacitor C3 can form a filter network, which can provide additional decoupling and noise filtering functions to ensure the stability of the output voltage.

[0059] The first conversion circuit can further include a thirteenth resistor. One end of the thirteenth resistor is respectively connected to the second conversion module and the third conversion module. The other end of the thirteenth resistor is grounded.

[0060] The thirteenth resistor can help discharge quickly when the power supply is turned off or "powered down", so as to eliminate the residual charge in the circuit.

[0061] The first conversion circuit can further include a first common mode choke bead FB1. One end of the first common mode choke bead FB1 is connected to the output end of the third conversion module. The other end of the first common mode choke bead FB1 is the output end of the first conversion circuit.

[0062] The first common mode choke bead FB1 can filter out high-frequency noise, reduce electromagnetic interference, and provide a cleaner and more stable power supply for the devices connected to the first conversion circuit and the second conversion circuit.

[0063] Please refer to Figure 5 ,Figure 5 This is a schematic diagram of a second conversion circuit disclosed in an embodiment of the present application. As Figure 5 shown, the second conversion circuit may include a fourth conversion module, a fifth conversion module, and a sixth conversion module.

[0064] The input terminal of the fourth conversion module is connected to the first input terminal of the fifth conversion module, the output terminal of the fourth conversion module is connected to the second input terminal of the fifth conversion module, the output terminal of the fifth conversion module is connected to the input terminal of the sixth conversion module, and the output terminal of the sixth conversion module is the output terminal of the second conversion circuit.

[0065] The fourth conversion module can convert the second direct current signal into a sixth direct current signal, and the voltage of the second direct current signal is greater than the voltage of the sixth direct current signal.

[0066] The fifth conversion module can convert the sixth direct current signal into a seventh direct current signal, and the voltage of the sixth direct current signal is greater than the voltage of the seventh direct current signal.

[0067] The sixth conversion module can convert the seventh direct current signal into a third direct current signal, and the voltage of the seventh direct current signal is greater than the voltage of the third direct current signal.

[0068] In Figure 5 the described second conversion circuit, the fourth conversion module can be a voltage division module, which can be composed of components such as resistors or zener diodes, and can reduce the input voltage (the second direct current signal) to a lower level (the sixth direct current signal). The fifth conversion module can further reduce the voltage (from the sixth direct current signal to the seventh direct current signal). The sixth conversion module can adjust the voltage to the level required by the load (the third direct current signal). The second conversion circuit can provide a stable power supply for the load connected to the second conversion circuit through step-by-step voltage reduction and voltage stabilization processing, and can ensure that the backend circuit can operate at the optimal voltage, thereby improving the performance and reliability of the overall system.

[0069] Please refer to Figure 6 , Figure 6 This is a schematic diagram of another second conversion circuit disclosed in an embodiment of the present application. Among them, Figure 6 the second conversion circuit shown in Figure 5 is optimized from the second conversion circuit shown in Figure 6 shown. As

[0070] One end of the fifth resistor R5 is connected to the first input terminal of the fifth conversion module. The other end of the fifth resistor R5 is respectively connected to one end of the sixth resistor R6, one end of the fourth capacitor C4, and the second input terminal of the fifth conversion module. The other ends of the sixth resistor R6 and the fourth capacitor C4 are respectively grounded. One end of the fifth resistor R5 is the input terminal of the fourth conversion module.

[0071] The fifth resistor R5 and the sixth resistor R6 can form a voltage divider, which can reduce the DC voltage output by the first conversion circuit and reduce the DC voltage output by the first conversion circuit to a predetermined lower level.

[0072] The fourth capacitor C4 can form a filter network with the sixth resistor R6, which can help stabilize the output voltage.

[0073] As Figure 6 shown, the fifth conversion module may include a second conversion unit.

[0074] The first end and the second end of the second conversion unit are respectively connected to the fourth conversion module. The third end and the fourth end of the second conversion unit are respectively connected to the sixth conversion module.

[0075] The second conversion unit can convert the sixth DC signal into a seventh DC signal.

[0076] Exemplarily, the second conversion unit can be a low dropout regulator (LDO). The model of the low dropout regulator can be ETA5050, or other models with the same function.

[0077] As Figure 6 shown, the sixth conversion module may include a seventh resistor R7, an eighth resistor R8, and a fifth capacitor C5.

[0078] Both ends of the seventh resistor R7 are respectively connected to the two output terminals of the fifth conversion module. The fifth capacitor C5 is connected in parallel with the seventh resistor R7. One end of the fifth capacitor C5 is the output terminal of the sixth conversion module. The other end of the fifth capacitor C5 is grounded through the eighth resistor R8.

[0079] The seventh resistor R7, the eighth resistor R8, and the ground terminal can form a voltage divider, which can fine-tune the voltage to ensure that a suitable voltage can be output.

[0080] The seventh resistor R7 and the fifth capacitor C5 can form a filter network, which can provide additional decoupling and noise filtering functions to ensure the stability of the output voltage.

[0081] The second conversion circuit may further include a fourteenth resistor. One end of the fourteenth resistor is connected to the fifth conversion module and the sixth conversion module respectively, and the other end of the fourteenth resistor is connected to the ground terminal.

[0082] The fourteenth resistor can help with rapid discharge when the power supply is turned off or "powered down", thereby eliminating residual charges in the circuit.

[0083] The second conversion circuit may further include a second common-mode rejection bead FB2. One end of the second common-mode rejection bead FB2 is connected to the output terminal of the sixth conversion module, and the other end of the second common-mode rejection bead FB2 is the output terminal of the second conversion circuit.

[0084] The second common-mode rejection bead FB2 can filter out high-frequency noise, reduce electromagnetic interference, and provide a cleaner and more stable power supply for downstream devices.

[0085] Please refer to Figure 7 , Figure 7 which is a schematic structural diagram of another control device disclosed in the embodiments of the present application. As Figure 7 shown, the control device may include a Bluetooth circuit, a driving circuit, and the above-mentioned conversion circuit.

[0086] The first end of the Bluetooth circuit is connected to the second output terminal of the conversion circuit, the second end of the Bluetooth circuit is connected to the signal input terminal of the driving circuit, the power input terminal of the driving circuit is connected to the first output terminal of the conversion circuit, the output terminal of the driving circuit is connected to the light-emitting device, and the first end of the Bluetooth circuit is the power input terminal of the Bluetooth circuit.

[0087] The power input terminal of the driving circuit is connected to the first output terminal of the conversion circuit, the first end of the Bluetooth circuit is connected to the first output terminal of the conversion circuit. The conversion circuit can convert the received first DC electrical signal with a higher voltage into second and third DC electrical signals with different levels of lower voltages to supply power to the Bluetooth circuit and the driving circuit. Specifically, the conversion circuit can convert the first DC electrical signal into a second DC electrical signal to supply power to the driving circuit, and the conversion circuit can convert the first DC electrical signal into a third DC electrical signal to supply power to the Bluetooth circuit.

[0088] The user can send a first control signal to the Bluetooth circuit through a device equipped with Bluetooth function. The Bluetooth circuit can receive the first control signal from the user and send the first control signal to the driving circuit. The first control signal is used to control the brightness, color, etc. of the light-emitting device. The user can customize the first control signal, such as adjusting the brightness, changing the color, on-off control, etc.

[0089] The driving circuit can control the lighting state of the light-emitting device according to the first control signal.

[0090] Please refer to Figure 8 ,Figure 8 is a schematic structural diagram of a driving circuit disclosed in an embodiment of the present application. As Figure 8 shown, the driving circuit may include a driving module.

[0091] The signal input end of the driving module is connected to the second end of the Bluetooth circuit, the power input end of the driving module is connected to the first output end of the conversion circuit, and the output end of the driving module is connected to the lighting device.

[0092] The driving module can control the lighting state of the lighting device according to the first control signal. Exemplarily, the driving module may be a single-channel Schmitt trigger buffer. When the driving module is a single-channel Schmitt trigger buffer, the first control signal may be a control signal in binary format. For example, the first control signal may be a high level (1) and a low level (0), and thus the lighting device can be turned on or off through the high level (1) and the low level (0).

[0093] As Figure 8 shown, the driving circuit may further include an input filtering module and an output filtering module.

[0094] The output end of the input filtering module is connected to the signal input end of the driving module, the input end of the output filtering module is connected to the output end of the driving module, the input end of the input filtering module is the signal input end of the driving circuit, and the output end of the output filtering module is the output end of the driving circuit.

[0095] The input filtering module can filter the high-frequency noise of the signal input to the driving module;

[0096] The output filtering module can filter the high-frequency noise of the signal output from the driving module.

[0097] As Figure 9 shown, Figure 9 is a schematic structural diagram of another driving circuit disclosed in an embodiment of the present application. The input filtering module may include a ninth resistor R9, a tenth resistor R10, and a sixth capacitor C6.

[0098] One end of the ninth resistor R9 is respectively connected to the signal input end of the driving module, one end of the tenth resistor R10, and one end of the sixth capacitor C6. The other end of the tenth resistor R10 and the other end of the sixth capacitor C6 are respectively grounded, and the other end of the ninth resistor R9 is the input end of the input filtering module.

[0099] The ninth resistor R9 and the tenth resistor R10 can reduce the high-frequency noise in the first control signal and improve the quality of the first control signal. In addition, the ninth resistor R9 and the tenth resistor R10 can also form a low-pass filter with the sixth capacitor C6, which can shape the edge of the first control signal, reduce the rapid change of the first control signal, and thus reduce overshoot and oscillation.

[0100] As Figure 9 shown, the output filtering module may include a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a second inductor L2, a third inductor L3, and a fourth inductor L4.

[0101] One end of the second inductor L2 is respectively connected to the output end of the driving module and one end of the seventh capacitor C7, the other end of the seventh capacitor C7 is grounded, and the other end of the second inductor L2 is respectively connected to one end of the third inductor L3, one end of the fourth inductor L4, and the light-emitting device. The other end of the third inductor L3 is grounded through the eighth capacitor C8, and the other end of the fourth inductor L4 is grounded through the ninth capacitor C9.

[0102] The seventh capacitor C7 can shape the output waveform to make the signal smoother.

[0103] The third inductor L3 is grounded through the eighth capacitor C8 to form a first low-pass filter. The third inductor L3 can block the passage of high-frequency signals, while low-frequency signals can flow more easily through the loop formed by the third inductor L3 and the eighth capacitor C8.

[0104] The fourth inductor L4 is grounded through the ninth capacitor C9 to form a second low-pass filter. The fourth inductor L4 can block the passage of high-frequency signals, while low-frequency signals can flow more easily through the loop formed by the fourth inductor L4 and the ninth capacitor C9.

[0105] When the values of the third inductor L3, the fourth inductor L4, the eighth capacitor C8, and the ninth capacitor C9 are different, the first low-pass filter and the second low-pass filter can filter different frequency ranges to more finely control the spectrum of the output signal.

[0106] As Figure 10 shown, Figure 10 is a schematic structural diagram of another driving circuit disclosed in the embodiment of the present application. The driving circuit may further include a protection module.

[0107] The input end of the protection module is connected to the output end of the driving module, and the output end of the protection module is the output end of the driving circuit;

[0108] The protection module can prevent the driving circuit from being damaged due to the induced reverse voltage when the inductive load is disconnected, and can prevent current backflow.

[0109] As Figure 11 shown, Figure 11 is a schematic structural diagram of another driving circuit disclosed in the embodiment of the present application. The protection module may include a first diode D1, a twelfth resistor R12, and a tenth capacitor C10.

[0110] The positive electrode of the first diode D1 is respectively connected to the output terminal of the output filtering module, one end of the twelfth resistor R12, and one end of the tenth capacitor C10. The negative electrode of the first diode D1 is respectively connected to the light-emitting device, the other end of the twelfth resistor R12, and the other end of the tenth capacitor C10.

[0111] The twelfth resistor R12 and the tenth capacitor C10 can provide damping by dissipating the energy stored in the inductance, reduce the resonance generated by the third inductor L3 and the fourth inductor L4, and stabilize the output signal.

[0112] While the first diode D1 prevents reverse voltage shock, the tenth capacitor C10 can help absorb voltage spikes or noise caused by fast switching, and the twelfth resistor R12 can ensure that the tenth capacitor C10 can discharge safely when the circuit is turned off.

[0113] The drive circuit may further include a fifteenth resistor R15. One end of the fifteenth resistor R15 is connected to the light-emitting device, and the other end of the fifteenth resistor R15 is connected to the ground terminal.

[0114] The fifteenth resistor R15 can help discharge quickly when the power supply is turned off or "powered down", thereby eliminating the residual charge in the circuit.

[0115] The drive circuit may further include an eleventh capacitor C11. One end of the eleventh capacitor C11 is connected to the first output terminal of the conversion circuit, and the other end of the eleventh capacitor C11 is connected to the ground terminal.

[0116] The eleventh capacitor C11, as a decoupling capacitor, can reduce high-frequency noise on the power line, provide local energy storage, and maintain voltage stability when the load changes instantaneously.

[0117] Please refer to Figure 12 , Figure 12 which is a schematic structural diagram of another control device disclosed in the embodiment of the present application. As Figure 12 shown, the control device may further include a switching circuit.

[0118] The first end of the switching circuit is connected to the input terminal of the conversion circuit, the second end of the switching circuit is connected to the Bluetooth circuit, and the third end of the switching circuit is connected to the light-emitting device.

[0119] The Bluetooth circuit can receive a switch control signal and send the switch control signal to the switching circuit.

[0120] The switching circuit can control the power state of the light-emitting device according to the switch control signal.

[0121] The control device may further include a Microcontroller Unit (MCU) circuit.

[0122] The power input terminal of the MCU circuit is connected to the second output terminal of the conversion circuit, and the signal output terminal of the MCU circuit is connected to the third terminal of the Bluetooth circuit. The third terminal of the Bluetooth circuit is the signal input terminal of the Bluetooth circuit.

[0123] The MCU circuit can receive the second control signal sent by the user and send the second control signal to the Bluetooth circuit; the Bluetooth circuit can send the second control signal to the driving circuit; the driving circuit can control the lighting state of the lighting device according to the second control signal.

[0124] The control device may further include a (Wireless Fidelity, WIFI) circuit.

[0125] The power input terminal of the WIFI circuit is connected to the second output terminal of the conversion circuit, and the signal output terminal of the WIFI circuit is connected to the third terminal of the Bluetooth circuit.

[0126] The WIFI circuit can receive the third control signal sent by the user and send the third control signal to the Bluetooth circuit; the Bluetooth circuit can send the third control signal to the driving circuit; the driving circuit can control the lighting state of the lighting device according to the third control signal.

[0127] An embodiment of the present application discloses a lighting fixture, including a lighting device and a control device.

[0128] Please refer to Figure 13 , Figure 13 which is a schematic structural diagram of a lighting fixture disclosed in an embodiment of the present application. As Figure 12 shown, the lighting fixture may include a lighting device and a control device.

[0129] The signal input terminal of the lighting device is connected to the output terminal of the driving circuit in the control device, and the power input terminal of the lighting device is connected to the input terminal of the conversion circuit in the control device.

[0130] Among them, the detailed description of the control device can refer to the above description.

[0131] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A conversion circuit, characterized in that, Comprising a first conversion circuit and a second conversion circuit, wherein: The output terminal of the first conversion circuit is connected to the input terminal of the second conversion circuit. The input terminal of the first conversion circuit is the input terminal of the conversion circuit. The output terminal of the first conversion circuit is the first output terminal of the conversion circuit. The output terminal of the second conversion circuit is the second output terminal of the conversion circuit; The first conversion circuit is configured to convert a first direct current signal into a second direct current signal, and the voltage of the first direct current signal is greater than the voltage of the second direct current signal; The second conversion circuit is configured to convert the second direct current signal into a third direct current signal, and the voltage of the second direct current signal is greater than the voltage of the third direct current signal; The first conversion circuit includes a first conversion module, a second conversion module, and a third conversion module; the input terminal of the first conversion module is connected to the first input terminal of the second conversion module, the output terminal of the first conversion module is connected to the second input terminal of the second conversion module, the output terminal of the second conversion module is connected to the input terminal of the third conversion module, the output terminal of the third conversion module is connected to the second conversion circuit, and the input terminal of the first conversion module is the input terminal of the first conversion circuit; The first conversion module is configured to convert the first direct current signal into a fourth direct current signal; The second conversion module is configured to convert the fourth direct current signal into a fifth direct current signal; The third conversion module is configured to convert the fifth direct current signal into a second direct current signal; The voltage of the first direct current signal is greater than the voltage of the fourth direct current signal, the voltage of the fourth direct current signal is greater than the voltage of the fifth direct current signal, and the voltage of the fifth direct current signal is greater than the voltage of the second direct current signal.

2. The conversion circuit according to claim 1, characterized in that The first conversion module includes a first resistor, a second resistor, and a first capacitor, wherein: One end of the first resistor is connected to the first input terminal of the second conversion module, and the other end of the first resistor is respectively connected to one end of the second resistor, one end of the first capacitor, and the second input terminal of the second conversion module. The other end of the second resistor and the other end of the first capacitor are respectively grounded, and one end of the first resistor is the input terminal of the first conversion module.

3. The conversion circuit according to claim 1, characterized in that The second conversion module includes a first conversion unit, a first inductor, and a second capacitor, wherein: The first end and the second end of the first conversion unit are respectively connected to the first conversion module. The third end of the first conversion unit is respectively connected to one end of the first inductor and one end of the second capacitor. The other end of the first inductor is connected to the first input terminal of the third conversion module. The fourth end of the first conversion unit is connected to the other end of the second capacitor. The fifth end of the first conversion unit is connected to the second input terminal of the third conversion module; The first conversion unit is configured to convert the fourth direct current signal into the fifth direct current signal.

4. The conversion circuit according to claim 1, characterized in that, The third conversion module includes a third resistor, a fourth resistor, and a third capacitor, wherein: Both ends of the third resistor are respectively connected to two output ends of the second conversion module. The third capacitor is connected in parallel with the third resistor. One end of the third capacitor is connected to the second conversion circuit, and the other end of the third capacitor is grounded through the fourth resistor.

5. The conversion circuit according to claim 1, wherein The second conversion circuit includes a fourth conversion module, a fifth conversion module, and a sixth conversion module, where: The input end of the fourth conversion module is connected to the first input end of the fifth conversion module. The output end of the fourth conversion module is connected to the second input end of the fifth conversion module. The output end of the fifth conversion module is connected to the input end of the sixth conversion module. The output end of the sixth conversion module is the output end of the second conversion circuit; The fourth conversion module is configured to convert the second direct current signal into a sixth direct current signal; The fifth conversion module is configured to convert the sixth direct current signal into a seventh direct current signal; The sixth conversion module is configured to convert the seventh direct current signal into a third direct current signal; The voltage of the second direct current signal is greater than the voltage of the sixth direct current signal. The voltage of the sixth direct current signal is greater than the voltage of the seventh direct current signal. The voltage of the seventh direct current signal is greater than the voltage of the third direct current signal.

6. The conversion circuit according to claim 5, wherein The fourth conversion module includes a fifth resistor, a sixth resistor, and a fourth capacitor, where: One end of the fifth resistor is connected to the first input end of the fifth conversion module. The other end of the fifth resistor is respectively connected to one end of the sixth resistor, one end of the fourth capacitor, and the second input end of the fifth conversion module. The other ends of the sixth resistor and the fourth capacitor are respectively grounded. One end of the fifth resistor is the input end of the fourth conversion module.

7. The conversion circuit according to claim 5, characterized in that, The fifth conversion module includes a second conversion unit, where: The first end and the second end of the second conversion unit are respectively connected to the fourth conversion module. The third end and the fourth end of the second conversion unit are respectively connected to the sixth conversion module; The second conversion unit is configured to convert the sixth direct current signal into the seventh direct current signal.

8. The conversion circuit according to claim 5, characterized in that, The sixth conversion module includes a seventh resistor, an eighth resistor, and a fifth capacitor, where: Both ends of the seventh resistor are respectively connected to two output ends of the fifth conversion module. The fifth capacitor is connected in parallel with the seventh resistor. One end of the fifth capacitor is the output end of the sixth conversion module. The other end of the fifth capacitor is grounded through the eighth resistor.

9. A control device, characterized in that, It includes a Bluetooth circuit, a drive circuit, and the conversion circuit according to any one of claims 1-8, where: The first end of the Bluetooth circuit is connected to the second output end of the conversion circuit. The second end of the Bluetooth circuit is connected to the signal input end of the drive circuit. The power input end of the drive circuit is connected to the first output end of the conversion circuit. The output end of the drive circuit is connected to a light-emitting device; The conversion circuit is configured to supply power to the Bluetooth circuit and the drive circuit; The Bluetooth circuit is configured to receive a first control signal and transmit the first control signal to the driving circuit; The driving circuit is configured to control the lighting state of the lighting device according to the first control signal.

10. The control device according to claim 9, characterized in that, The driving circuit includes a driving module, wherein: The signal input end of the driving module is connected to the second end of the Bluetooth circuit, the power input end of the driving module is connected to the first output end of the conversion circuit, and the output end of the driving module is connected to the lighting device; The driving module is configured to control the lighting state of the lighting device according to the first control signal.

11. The control device according to claim 10, characterized in that, The driving circuit further includes an input filtering module and an output filtering module, wherein: The output end of the input filtering module is connected to the signal input end of the driving module, the input end of the output filtering module is connected to the output end of the driving module, the input end of the input filtering module is the signal input end of the driving circuit, and the output end of the output filtering module is the output end of the driving circuit; The input filtering module is configured to filter high-frequency noise; The output filtering module is configured to filter high-frequency noise.

12. The control device according to claim 11, characterized in that, The input filtering module includes a ninth resistor, a tenth resistor, and a sixth capacitor, wherein: One end of the ninth resistor is respectively connected to the signal input end of the driving module, one end of the tenth resistor, and one end of the sixth capacitor. The other end of the tenth resistor and the other end of the sixth capacitor are respectively grounded, and the other end of the ninth resistor is the input end of the input filtering module.

13. The control device according to claim 11, wherein The output filtering module includes a seventh capacitor, an eighth capacitor, a ninth capacitor, a second inductor, a third inductor, and a fourth inductor, wherein: One end of the second inductor is respectively connected to the output end of the driving module and one end of the seventh capacitor. The other end of the second inductor is respectively connected to one end of the third inductor, one end of the fourth inductor, and the lighting device. The other end of the seventh capacitor is grounded. The other end of the third inductor is grounded through the eighth capacitor, and the other end of the fourth inductor is grounded through the ninth capacitor.

14. The control device according to claim 10, wherein The driving circuit further includes a protection module, wherein: The input end of the protection module is connected to the output end of the driving module, and the output end of the protection module is the output end of the driving circuit; The protection module is configured to prevent current backflow.

15. The control device according to claim 14, characterized in that, The protection module includes a first diode, a twelfth resistor, and a tenth capacitor, wherein: The positive electrode of the first diode is respectively connected to the output end of the driving module, one end of the twelfth resistor, and one end of the tenth capacitor. The negative electrode of the first diode is respectively connected to the lighting device, the other end of the twelfth resistor, and the other end of the tenth capacitor.

16. A lighting fixture, characterized in that, A lighting device and a control device according to any one of claims 10-15 are included.

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