CN215734943U - Microwave induction LED drive circuit and LED lamp - Google Patents
Microwave induction LED drive circuit and LED lamp Download PDFInfo
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- CN215734943U CN215734943U CN202121215947.6U CN202121215947U CN215734943U CN 215734943 U CN215734943 U CN 215734943U CN 202121215947 U CN202121215947 U CN 202121215947U CN 215734943 U CN215734943 U CN 215734943U
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Abstract
The utility model relates to the technical field of illumination, in particular to a microwave induction LED drive circuit and an LED lamp. The microwave induction LED driving circuit comprises an input circuit, a microwave control circuit, a driving power supply circuit and an LED lamp string, wherein the control output end of the microwave induction module outputs an adjusting signal, and the first adjusting switch is closed according to the output adjusting signal so that the driving end of the driving module is conducted; the LED lamp comprises the microwave induction LED driving circuit, a control panel and a light source panel, the LED lamp string is arranged on the light source panel, the input circuit, the microwave control circuit and the driving power supply circuit are arranged on the control panel, the control panel is arranged on the surface side of the light source panel, and an isolation pad is arranged between the control panel and the light source panel. The microwave induction LED drive circuit triggers the enabling end of the drive module through the switching device to control the on and off of the LED lamp string, and avoids the false triggering of the LED lamp string caused by the self-excited oscillation of the circuit.
Description
Technical Field
The utility model relates to the technical field of illumination, in particular to a microwave induction LED drive circuit and an LED lamp.
Background
The LED lamp is widely used due to its unique advantages, and the current commonly used LED lamps all control the on-off state of the LED bulb through a switch, however, for some public places, it is very inconvenient to control the on-off state through a switch, and thus, a microwave-induced LED lamp has been proposed.
At present, a microwave induction module of a microwave induction LED lamp in the market is arranged inside a lamp body, and the working principle of the microwave induction module is that when a person enters the detection range of the microwave induction module, the microwave induction module triggers the LED lamp to light, otherwise, the LED lamp is turned off. However, the driving circuit of the LED lamp usually adopts a power switch to directly drive and control the on/off of the LED lamp string, and the LED lamp is easily triggered by self-excitation, which affects the use effect.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a microwave-sensing LED driving circuit and an LED lamp, which are used to solve one or more technical problems in the prior art and provide at least one of the advantages.
In a first aspect, a microwave induction LED driving circuit is provided, which comprises an input circuit for accessing an input voltage, a microwave control circuit, a driving power circuit and an LED lamp string;
the microwave control circuit comprises a microwave induction module and a first regulating switch, the microwave induction module is provided with a control output end, the driving power supply circuit comprises a driving module, and the driving module is provided with an enabling end and a driving end;
the input circuit is respectively connected with the microwave control circuit, the driving power supply circuit and the anode end of the LED lamp string and is used for electrifying the microwave control circuit, the driving power supply circuit and the LED lamp string;
the driving end of the driving module is connected with the cathode end of the LED lamp string, one end of the first adjusting switch is connected with the enabling end of the driving module, the other end of the first adjusting switch is grounded, and the triggering end of the first adjusting switch is connected with the control output end of the microwave induction module;
the control output end of the microwave induction module outputs an adjusting signal, and the first adjusting switch is closed according to the output adjusting signal, so that the driving module is conducted with the driving end of the driving module.
Further, an input circuit is connected with the direct-current voltage, and the input circuit comprises an input protection module and an input filtering module;
the input protection module is connected with direct current voltage, the input end of the input filtering module is connected with the output end of the input protection module, and the output end of the input filtering module is connected with the driving power supply circuit.
Further, the driving module is an MPQ2489 type chip.
Furthermore, the driving power supply circuit also comprises a current detection module, an energy storage module and an output filtering module;
the current detection module is connected in series between the input circuit and the detection end of the drive module, so that the output signal of the input circuit flows to the detection end of the drive module; the output filter unit is connected with the LED lamp string in parallel and filters interference signals flowing to the LED lamp string; the energy storage module is connected between the LED lamp string and the driving end of the driving module in series.
Further, the microwave induction LED drive circuit also comprises a voltage division module;
the voltage division module is connected in series between the output end of the input circuit and the microwave control circuit, so that the output signal of the input circuit flows to the microwave control circuit after being subjected to voltage reduction.
Further, the microwave control circuit also comprises a second regulating switch;
one end of the second adjusting switch is connected with the power supply from the input circuit, the other end of the second adjusting switch is connected with the trigger end of the first adjusting switch, and the trigger end of the second adjusting switch is connected with the control output end of the microwave induction module.
Furthermore, an input circuit is connected with alternating voltage and comprises an input protection module and a rectification filter module;
the input protection module is connected with the rectifying and filtering module, and the output end of the rectifying and filtering module is respectively connected with the driving module, the LED lamp string and the microwave control circuit.
In a second aspect, an LED lamp is provided, which includes the microwave-induced LED driving circuit of the first aspect, and further includes a control board, a light source board, and a driving board;
the microwave control circuit is arranged on the control panel, the LED lamp string is arranged on the light source board, the driving power supply circuit is arranged on the driving board, the control panel is arranged on the surface side of the light source board, and the isolation pad is arranged between the control panel and the light source board.
Further, the control panel passes through binding post with the light source board and connects, and drive plate and light source board pass through binding post and connect.
Furthermore, the isolation pad is an EVA pad, and the thickness of the isolation pad is 6-9 mm.
The utility model has the beneficial effects that: the LED lamp string lighting and extinguishing control device has the advantages that the switch device triggers the enabling end of the driving module to control the LED lamp string to be turned on and turned off, the microwave sensing module and the LED lamp string are isolated and arranged through the isolation pad during installation of the lamp body, circuit self-oscillation is avoided, the LED lamp string is prevented from being triggered mistakenly, and practicability is improved.
Drawings
Fig. 1 is a block diagram of a microwave-induced LED driving circuit according to the present invention.
Fig. 2 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a first embodiment.
Fig. 3 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a second embodiment.
Fig. 4 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a third embodiment.
Fig. 5 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a fourth embodiment.
Fig. 6 is an exploded schematic view of an LED lamp according to an embodiment.
Fig. 7 is an enlarged schematic view at the drive plate a in fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described with reference to the embodiments and the accompanying drawings.
According to a first aspect of the present invention, a microwave-sensitive LED driving circuit is provided.
Referring to fig. 1, the microwave induction LED driving circuit includes an input circuit 100, a microwave control circuit 200, a driving power circuit 300, and an LED light string 400, wherein the input circuit 100 is used for receiving an input voltage;
the microwave control circuit 200 comprises a microwave sensing module 210 and a first regulating switch 220, the microwave sensing module 210 has a control output end, the driving power circuit 300 comprises a driving module 310, and the driving module 310 has an enable end EN and a driving end G;
the input circuit 100 is respectively connected with the microwave control circuit 200, the driving power supply circuit 300 and the anode ends of the LED lamp string 400, and powers on the microwave control circuit 200, the driving power supply circuit 300 and the LED lamp string 400;
the driving end of the driving module 310 is connected to the cathode end of the LED light string 400, one end of the first adjusting switch 220 is connected to the enable end EN of the driving module 310, the other end of the first adjusting switch 220 is grounded, and the trigger end of the first adjusting switch 220 is connected to the control output end OUT of the microwave sensing module 210.
The principle of the microwave induction LED drive circuit is as follows:
the input circuit 100 is connected with an input voltage, the microwave control circuit 200, the driving power circuit 300 and the LED lamp string 400 are powered on, the microwave sensing module 210 monitors whether a person passes through the sensing range, when the person passes through the sensing range, the control output end OUT of the microwave sensing module 210 outputs a regulating signal, the first regulating switch 220 is closed according to the output regulating signal, the driving module 310 is enabled to be connected with the driving end G of the driving module, and therefore the LED lamp string 400 is lightened, otherwise, the driving end G of the driving module 310 is switched off, and the LED lamp string 400 is extinguished.
More specifically, when the microwave sensing module 210 monitors that a person passes through the sensing range, the control output end OUT of the microwave sensing module 210 outputs a low-level adjustment signal to trigger the first adjustment switch 220 to be turned off, so that the level signal of the enable end EN of the driving chip 310 is maintained, the driving end G of the driving module 310 is driven to be turned on, and the LED light string 400 is turned on; on the contrary, the control output end OUT of the microwave sensing module 210 is in a high level output state, and triggers the first adjusting switch 220 to be turned on, so as to pull down the level signal of the enable end EN of the driving module 310, and the driving end G of the driving module 310 is kept turned off, so that the LED lamp string 400 is extinguished.
The microwave-induced LED driving circuit is further described with reference to specific circuit structures.
Fig. 2 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a first embodiment.
Referring to fig. 2, in the present embodiment, the input circuit 100 is connected to a dc voltage, and is suitable for an application environment of a low-voltage dc input, the driving module 310 is an MPQ2489 chip, and the first regulating switch 220 is an N-type transistor. It should be noted that the MPQ2489 type chip and the N-type transistor are only one implementation manner, and other types of chips or components may be used instead of the MPQ2489 type chip and the N-type transistor, which are not described herein again.
The input circuit 100 according to this embodiment includes an input protection module 110 and an input filtering module 120; the input protection module 110 is connected to a dc voltage, the input end of the input filter module 120 is connected to the output end of the input protection module 110, and the output end of the input filter module 120 is connected to the driving power supply circuit 300.
In the present embodiment, the input protection module 110 includes a fuse FR 1.
Specifically, the input circuit 100 further has a first input node + and a second input node, the first input node + is connected to one end of a fuse FR1, and the other end of the fuse FR1 is connected to the input terminal of the input filter module 120.
In the present embodiment, the input filter module 120 includes a first capacitor C1, a first resistor R1, a first inductor L1, and a first electrolytic capacitor CE 1.
Specifically, one end of the first capacitor C1 and the anode of the first electrolytic capacitor CE1 are connected to the fuse FR1, the other end of the first capacitor C1 is connected to the second input node — and one end of the first inductor L1, respectively, and the other end of the first inductor L1 and the cathode of the first electrolytic capacitor CE1 are grounded. The input filter module 120 filters the interference signal in the output voltage of the fuse FR1, wherein the first capacitor C1 is used for suppressing the differential mode interference at the first input node + and the second input node-, and the first inductor L1 is used for suppressing the differential mode interference at the second input node-.
The driving power circuit 300 of this embodiment further includes a current detection module 320, an energy storage module 330, and an output filter module 340; the current detection module 320 is connected in series between the input circuit 100 and the detection end RS of the driving module 310, so that the output signal of the input circuit 100 flows to the detection end RS of the driving module 310; the output filter unit 340 is connected in parallel with the LED lamp string 400 to filter the interference signal flowing to the LED lamp string 400; the energy storage module 330 is connected in series between the LED string and the driving terminal SW of the driving module 310.
In the present embodiment, the current detection module 320 includes a detection resistor RS 1.
Specifically, one end of the detection resistor RS1 is connected to the first input node +, and the other end of the detection resistor RS1 is connected to the current detection end RS of the driving module 310 and the anode of the LED string 400.
In the present embodiment, the energy storage module 330 includes a second inductor L2.
Specifically, one end of the second inductor L2 is connected to the driving terminal SW of the driving module 310, and the other end of the second inductor L2 is connected to the cathode of the LED light string 400.
In the present embodiment, the output filter module 340 includes a second resistor R2 and a second electrolytic capacitor CE 2.
Specifically, the second resistor R2 is connected in parallel with the LED light string 400, the anode of the second electrolytic capacitor CE2 is connected to the anode of the LED light string 400, and the cathode of the second electrolytic capacitor CE2 is connected to the cathode of the LED light string 400. The second electrolytic capacitor CE2 and the second inductor L2 are respectively used for filtering out interference signals on the driving power circuit 300, and the second resistor R2 is used for discharging the electric quantity of the second electrolytic capacitor CE 2.
The microwave-induced LED driving circuit described in this embodiment further includes a voltage dividing module 500; the voltage divider module 500 is connected in series between the output end of the input circuit 100 and the microwave control circuit 200, so that the output signal of the input circuit 100 flows to the microwave control circuit 200 after being reduced in voltage.
In this embodiment, the voltage dividing module 500 includes a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is connected to the input circuit 100, the other end of the third resistor R3 is connected to one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the microwave control circuit 200, so as to provide a suitable operating voltage for the microwave control circuit 200 by configuring the voltage dividing module 500.
Fig. 3 is a schematic circuit diagram of a microwave-induced LED driving circuit according to a second embodiment.
Referring to fig. 3, on the basis of the above embodiments, the input circuit 100 of the present embodiment is connected to an ac voltage, and is suitable for an application environment of ac mains input, and the driving module 310 is a JW19987 chip.
The functions of the microwave control circuit 200, the driving power circuit 300, the LED light string 400 and the voltage dividing module 500 in this embodiment are the same as those in the above embodiments, but the structures are slightly different, and are not described herein again.
The input circuit 100 of the present embodiment includes an input protection module 110 and a rectifying and filtering module 130; the input protection module 110 is connected to the rectifying and filtering module 130, and the output end of the rectifying and filtering module 130 is respectively communicated with the driving module 310, the LED light string 400 and the microwave control circuit 200.
In the present embodiment, the input protection module 110 includes a fuse FR 1.
Specifically, the input circuit 100 is further provided with a first input node + and a second input node-, the first input node + is connected to one end of the fuse FR1, and the other end of the fuse FR1 is connected to the input end of the rectifying and filtering module 130.
In the present embodiment, the rectifying and filtering module 130 includes a first capacitor C1, a rectifier bridge BD1, a first resistor R1, a first inductor L1, and a second capacitor C2.
Specifically, a first input end of the rectifier bridge BD1 and one end of the first capacitor C1 are respectively connected to the fuse FR1, a second input node-is respectively connected to a second input end of the rectifier bridge BD1 and the other end of the first capacitor C1, one end of the first inductor L1 is connected to a first output end of the rectifier bridge BD1, the other end of the first inductor L1 is respectively connected to an anode of the LED light string 400 and one end of the second capacitor C2, the other end of the second capacitor C2 and a second output end of the rectifier bridge BD1 are grounded, and the first resistor R1 is connected in parallel to the first inductor L1.
In the present embodiment, the first input node L and the second input node N are respectively used for connecting the live wire and the neutral wire, and the first inductor L1 is used for suppressing the differential mode interference on the first output end of the rectifier bridge BD 1.
In this embodiment, the driving power circuit 300 further includes a detection resistor RS1 and a first diode D1, one end of the detection resistor RS1 is connected to the current detection terminal CS of the driving module 310, the other end of the detection resistor RS1 is grounded, the anode of the first diode D1 is connected to the driving terminal DRAIN of the driving module 310, the cathode of the first diode D1 is connected to the first inductor L1, and the first diode D1 functions to stabilize voltage.
In actual use, the control output end OUT of the microwave sensing module 210 outputs an adjustment signal, the adjustment signal acts on the enable end OVP/EN of the driving module 310 through the first adjustment switch 220, and the driving module turns on or off the driving end DRAIN according to the level condition of the enable end OVP/EN.
Fig. 4 is a schematic circuit diagram of a microwave-responsive LED driving circuit according to a third embodiment, and fig. 5 is a schematic circuit diagram of a microwave-responsive LED driving circuit according to a fifth embodiment.
Referring to fig. 4-5, in the embodiment of fig. 2 and 3, the microwave control circuit 200 further includes a second regulating switch 230; one end of the second adjusting switch 230 is connected to the power supply from the input circuit 100, the other end of the second adjusting switch 230 is connected to the trigger end of the first adjusting switch 220, and the trigger end of the second adjusting switch 230 is connected to the control output end of the microwave sensing module 210.
In practical use, when the microwave sensing module 210 monitors that a person passes through the sensing range, the control output end OUT of the microwave sensing module 210 outputs a high-level adjusting signal, so that the first adjusting switch 220 and the second adjusting switch 230 are both turned on, the level signal of the enable end EN of the driving module 310 is pulled down, the driving end SW of the driving module 310 is kept turned off, and the LED light string 400 is extinguished; on the contrary, the control output end OUT of the microwave sensing module 210 is in a low level output state, so that both the first adjusting switch 220 and the second adjusting switch 230 are turned off, and the level signal of the enable end EN of the driving chip 310 is maintained, thereby driving the driving end SW of the driving module 310 to be turned on, and lighting the LED lamp string 400.
According to a second aspect of the present invention, there is provided an LED lamp, referring to fig. 6 to 7, comprising the microwave induction LED driving circuit of the first aspect, and a control board 600, a light source board 700 and a driving board 800.
The microwave control circuit 200 is arranged on the control board 600, the LED string 400 is arranged on the light source board 700, the driving power supply circuit 300 is arranged on the driving board 800, the control board 600 is arranged on the surface side of the light source board 700, and the isolation pad 910 is arranged between the control board 600 and the light source board 700.
In this embodiment, the sensing element, the electrical element and the light source assembly are separately disposed through the control board 600, the light source board 700 and the driving board 800, and the control board 600 and the light source board 700 are isolated by the isolation pad 800, so that the phenomenon of self-oscillation in the circuit can be effectively reduced, and the LED light string 400 is falsely triggered.
Further, the control board 600 and the light source board 700 are connected through the connection terminal 920, and the driving board 800 and the light source board 700 are connected through the connection terminal 920, thereby preventing self-false triggering.
In this embodiment, the isolation pad 910 is an EVA pad, and the thickness of the isolation pad 910 is 6-9 mm.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A microwave induction LED drive circuit comprises an input circuit for accessing input voltage, and is characterized by further comprising a microwave control circuit, a drive power supply circuit and an LED lamp string;
the microwave control circuit comprises a microwave induction module and a first regulating switch, the microwave induction module is provided with a control output end, the driving power circuit comprises a driving module, and the driving module is provided with an enabling end and a driving end;
the input circuit is respectively connected with the microwave control circuit, the driving power supply circuit and the anode end of the LED lamp string and is used for electrifying the microwave control circuit, the driving power supply circuit and the LED lamp string;
the driving end of the driving module is connected with the cathode end of the LED lamp string, one end of the first adjusting switch is connected with the enabling end of the driving module, the other end of the first adjusting switch is grounded, and the triggering end of the first adjusting switch is connected with the control output end of the microwave induction module;
the control output end of the microwave induction module outputs an adjusting signal, and the first adjusting switch is closed according to the output adjusting signal, so that the driving module is conducted with the driving end of the driving module.
2. The microwave-sensing LED driving circuit according to claim 1, wherein the input circuit is connected to a dc voltage, and the input circuit includes an input protection module and an input filter module;
the input protection module is connected with direct-current voltage, the input end of the input filtering module is connected with the output end of the input protection module, and the output end of the input filtering module is connected with the driving power supply circuit.
3. The microwave-sensing LED driving circuit according to claim 2, wherein the driving module is an MPQ2489 type chip.
4. The microwave-sensing LED driving circuit according to claim 1, wherein the driving power circuit further comprises a current detection module, an energy storage module and an output filtering module;
the current detection module is connected between the input circuit and the detection end of the driving module in series, so that an output signal of the input circuit flows to the detection end of the driving module; the output filter unit is connected with the LED lamp string in parallel and filters interference signals flowing to the LED lamp string; the energy storage module is connected between the LED lamp string and the driving end of the driving module in series.
5. The microwave-sensing LED driving circuit according to claim 1, further comprising a voltage dividing module;
the voltage division module is connected between the output end of the input circuit and the microwave control circuit in series, so that the output signal of the input circuit flows to the microwave control circuit after being subjected to voltage reduction.
6. The microwave-sensitive LED drive circuit of claim 4, wherein the microwave control circuit further comprises a second regulation switch;
the microwave induction module is characterized in that one end of the second adjusting switch is connected with the power supply from the input circuit, the other end of the second adjusting switch is connected with the trigger end of the first adjusting switch, and the trigger end of the second adjusting switch is connected with the control output end of the microwave induction module.
7. The microwave-induced LED driving circuit according to claim 1, wherein the input circuit is connected to an alternating voltage, and comprises an input protection module and a rectifying and filtering module;
the input protection module is connected with the rectification filter module, and the output end of the rectification filter module is respectively connected with the driving module, the LED lamp string and the microwave control circuit.
8. An LED lamp comprising the microwave induction LED driving circuit according to any one of claims 1 to 7, further comprising a control board, a light source board, and a driving board;
the LED lamp string is characterized in that the microwave control circuit is arranged on the control board, the LED lamp string is arranged on the light source board, the driving power supply circuit is arranged on the driving board, the control board is arranged on the surface side of the light source board, and the isolation pad is arranged between the control board and the light source board.
9. The microwave induction LED driving circuit according to claim 8, wherein the control board and the light source board are connected through a terminal, and the driving board and the light source board are connected through a terminal.
10. The microwave induction LED driving circuit according to claim 8, wherein the isolation pad is an EVA pad, and the thickness of the isolation pad is 6-9 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121215947.6U CN215734943U (en) | 2021-06-01 | 2021-06-01 | Microwave induction LED drive circuit and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121215947.6U CN215734943U (en) | 2021-06-01 | 2021-06-01 | Microwave induction LED drive circuit and LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN215734943U true CN215734943U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121215947.6U Active CN215734943U (en) | 2021-06-01 | 2021-06-01 | Microwave induction LED drive circuit and LED lamp |
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| CN (1) | CN215734943U (en) |
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- 2021-06-01 CN CN202121215947.6U patent/CN215734943U/en active Active
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