CN216752170U

CN216752170U - Deep dimming circuit and lighting device thereof

Info

Publication number: CN216752170U
Application number: CN202220180449.0U
Authority: CN
Inventors: 施慧霞
Original assignee: Individual
Current assignee: Zhongshan Yuangu Intelligent Technology Co.,Ltd.
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-14
Anticipated expiration: 2032-01-24

Abstract

The utility model provides a deep dimming circuit and a lighting device thereof, and relates to the technical field of lighting products. The depth dimming circuit comprises a pulse width modulation module, a field effect tube, an I-shaped inductor and a diode, wherein a source electrode of the field effect tube is electrically connected with an external power supply, the pulse width modulation module is respectively and electrically connected with a source electrode and a grid electrode of the field effect tube, a drain electrode of the field effect tube is respectively and electrically connected with an input end of the I-shaped inductor and an anode of the diode, a cathode of the diode is used for being electrically connected with an anode of the LED driving device, an output end of the I-shaped inductor is used for being electrically connected with a cathode of the LED driving device, and a source electrode of the field effect tube is grounded. According to the utility model, the pulse width modulation module controls the conduction of the field effect tube according to PWM signals with different duty ratios, and the I-shaped inductor is combined to control the magnitude of the current flowing through the field effect tube, so that flexible deep dimming is realized, the dimming effect is improved, and meanwhile, the diode can prevent current backflushing when the field effect tube is conducted, and the use safety is improved.

Description

Deep dimming circuit and lighting device thereof

Technical Field

The utility model relates to the technical field of lighting products, in particular to a deep dimming circuit and a lighting device thereof.

Background

With the development of technology, the control of the light fixture is no longer limited to the conventional switching function. Dimming circuits for changing the brightness of lamps are emerging at present to achieve richer lighting effects. At present, most of methods for changing the brightness of a lamp are to add a linear dimming circuit after AC/DC output, the linear dimming circuit includes electronic elements such as an integrated circuit chip, a resistor, a capacitor, etc., the lamp generally includes a plurality of LEDs connected in series, but the linear dimming circuit has a narrow voltage output in the plurality of LEDs connected in series, which results in poor dimming effect, and the linear dimming circuit has a high temperature during use, which has a great potential safety hazard, and the manufacturing cost is also high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a deep dimming circuit and a lighting device thereof, which are used for solving the defect of poor dimming effect of a linear dimming circuit in the prior art.

The utility model provides a deep dimming circuit which comprises a pulse width modulation module, a field effect tube, an I-shaped inductor and a diode, wherein the source electrode of the field effect tube is electrically connected with an external power supply, the pulse width modulation module is electrically connected with the grid electrode of the field effect tube, the drain electrode of the field effect tube is respectively electrically connected with the input end of the I-shaped inductor and the anode of the diode, the cathode of the diode is used for being electrically connected with the anode of an LED driving device, the output end of the I-shaped inductor is used for being electrically connected with the cathode of the LED driving device, and the source electrode of the field effect tube is grounded.

According to the deep dimming circuit provided by the utility model, the deep dimming circuit further comprises an RF wireless signal transmission module, and the RF wireless signal transmission module is electrically connected with an external power supply and the pulse width modulation module.

According to the deep dimming circuit provided by the utility model, the pulse width modulation module comprises a first resistor, a second resistor, a third resistor, a first triode and a second triode, the input end of the first resistor and the input end of the second resistor are respectively electrically connected with an external power supply, the output end of the first resistor is respectively and electrically connected with the collector electrode of the first triode and the base electrode of the second triode, the output end of the second resistor is respectively and electrically connected with the collector electrode of the second triode and the grid electrode of the field effect transistor, the RF wireless signal transmission module is electrically connected with the input end of the third resistor, the output end of the third resistor is electrically connected with the base electrode of the first triode, and the emitting electrode of the first triode and the emitting electrode of the second triode are electrically connected with the source electrode of the field effect transistor.

According to the deep dimming circuit provided by the utility model, the pulse width modulation module, the field effect transistor, the I-shaped inductor and the diode are arranged into a group of dimming modules, the dimming modules are provided with two groups, namely a first dimming module and a second dimming module, the first dimming module and the second dimming module are respectively and electrically connected with an external power supply, the RF wireless signal transmission module is respectively and electrically connected with the pulse width modulation module of the first dimming module and the pulse width modulation module of the second dimming module, the cathode of the diode in the first dimming module is used for being electrically connected with the anode of the warm white LED driving device, the output end of the I-shaped inductor in the first dimming module is used for being electrically connected with the cathode of the warm white LED driving device, the cathode of the diode in the second dimming module is used for being electrically connected with the anode of the cold white LED driving device, and the output end of the I-shaped inductor in the second dimming module is used for being electrically connected with the cathode of the cold white LED driving device.

The utility model also provides a lighting device with a deep dimming function, which comprises the deep dimming circuit and the LED driving device, wherein the cathode of the diode in the deep dimming circuit is electrically connected with the anode of the LED driving device, and the output end of the I-shaped inductor in the deep dimming circuit is electrically connected with the cathode of the LED driving device.

The lighting device with the deep dimming function comprises a Pi-shaped filter module, a first rectifying filter module, a high-voltage inverter module and a second rectifying filter module, wherein the input end of the Pi-shaped filter module is electrically connected with an external power supply, the output end of the Pi-shaped filter module is electrically connected with the input end of the first rectifying filter module, the output end of the first rectifying filter module is electrically connected with the high-voltage inverter module, the first output end of the high-voltage inverter module is electrically connected with the first input end of the pulse width modulation module, the second output end of the high-voltage inverter module is electrically connected with the input end of the second rectifying filter module, and the output end of the second rectifying filter module is electrically connected with the second input end of the pulse width modulation module.

According to the lighting device with the depth dimming function, the Pi-shaped filtering module comprises a piezoresistor, a protective tube and a Pi-shaped filtering component, wherein the input end of the piezoresistor and the input end of the protective tube are respectively and electrically connected with a live wire of an external power supply, the output end of the protective tube is electrically connected with the first input end of the Pi-shaped filtering component, the output end of the piezoresistor and the second input end of the Pi-shaped filtering component are respectively and electrically connected with a zero wire of the external power supply, the first output end of the Pi-shaped filtering component is electrically connected with the first input end of the first rectifying filtering module, and the second output end of the Pi-shaped filtering component is electrically connected with the second input end of the first rectifying filtering module.

According to the lighting device with the deep dimming function, the first rectifying and filtering module comprises a rectifying bridge stack and a first electrolytic capacitor, the first output end of the Pi-shaped filtering component is electrically connected with the first input end of the rectifying bridge stack, the second output end of the Pi-shaped filtering component is electrically connected with the second input end of the rectifying bridge stack, the positive output end of the rectifying bridge stack is electrically connected with the positive electrode of the first electrolytic capacitor and the first input end of the high-voltage inverter module respectively, and the negative output end of the rectifying bridge stack is electrically connected with the negative electrode of the first electrolytic capacitor and the second input end of the high-voltage inverter module respectively.

According to the lighting device with deep dimming function provided by the utility model, the second rectifying and filtering module comprises a fourth resistor, a fifth resistor, a non-polar capacitor, a first diode, a second electrolytic capacitor and a third electrolytic capacitor, a second output end of the high-voltage inversion module is respectively and electrically connected with an input end of the fourth resistor, an anode of the first diode, an anode of the second diode and an input end of the fifth resistor, the output end of the fourth resistor is electrically connected with the input end of the non-polar capacitor, the output end of the non-polar capacitor, the cathode of the first diode, the cathode of the second diode and the output end of the fifth resistor are respectively electrically connected with the cathode of the diode in the deep dimming circuit, the second electrolytic capacitor and the third electrolytic capacitor are respectively connected in parallel between the cathode of the diode in the deep dimming circuit and the input end of the fifth resistor.

According to the lighting device with the deep dimming function, the high-voltage inversion module comprises a main control module, a high-voltage inversion sub-module, a current intensity monitoring sub-module and an adjustment module, the output end of the first rectification filter module is electrically connected with the main control module, the main control module is respectively electrically connected with the high-voltage inversion sub-module, the current intensity monitoring sub-module and the adjustment control module, the output end of the high-voltage inversion sub-module is electrically connected with the input end of the second rectification filter module, the output end of the second rectification filter module is electrically connected with the current intensity monitoring sub-module, and the adjustment module is electrically connected with the high-voltage inversion sub-module.

According to the deep dimming circuit and the lighting device thereof, the pulse width modulation module controls the conduction of the field effect tube according to PWM signals with different duty ratios, the I-shaped inductor is combined to control the magnitude of current flowing through the field effect tube, so that flexible deep dimming is realized, the dimming effect is improved, meanwhile, when the field effect tube is conducted, a diode can prevent current backflushing, and the use safety of the deep dimming circuit and the lighting device thereof is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a deep dimming circuit provided in the present invention;

FIG. 2 is a schematic circuit diagram of an RF wireless signal transmission module of the deep dimming circuit provided in the present invention;

fig. 3 is one of the schematic circuit diagrams of the deep dimming circuit provided in the present invention;

FIG. 4 is a second schematic circuit diagram of the deep dimming circuit provided in the present invention;

fig. 5 is a schematic structural diagram of an illumination device with deep dimming function according to the present invention;

fig. 6 is a schematic circuit diagram of a pi filter module of the lighting device with deep dimming function according to the present invention;

fig. 7 is a schematic circuit diagram of a first rectifying and filtering module of a lighting device with deep dimming function according to the present invention;

fig. 8 is a schematic circuit diagram of a second rectifying and filtering module of the lighting device with deep dimming function according to the present invention;

fig. 9 is a schematic circuit diagram of a lighting device with deep dimming function according to the present invention, wherein a high voltage inverter module is shown in the block diagram;

fig. 10 is a schematic circuit diagram of a high-voltage inverter module of a lighting device with deep dimming function according to the present invention, and is an enlarged schematic diagram of the block diagram in fig. 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following describes a deep dimming circuit and a lighting device thereof according to the present invention with reference to fig. 1 to 10.

Referring to fig. 1, the depth light modulation circuit provided by the present invention may include a pulse width modulation module, a field effect transistor, an i-shaped inductor, and a diode, wherein a source of the field effect transistor is electrically connected to an external power source, the pulse width modulation module is electrically connected to a gate of the field effect transistor, a drain of the field effect transistor is electrically connected to an input terminal of the i-shaped inductor and an anode of the diode, respectively, a cathode of the diode is electrically connected to an anode of an LED driving device, an output terminal of the i-shaped inductor is electrically connected to a cathode of the LED driving device, and a source of the field effect transistor is grounded.

The external power supply may be a power supply carried by the lighting apparatus itself when the deep dimming circuit is applied to a certain lighting apparatus, or may be 220V commercial power or the like.

It should be noted that pulse width modulation is a PWM signal control method, and modulates the bias of the base of the transistor or the gate of the MOS transistor according to the change of the corresponding load, so as to change the conduction time of the transistor or the MOS transistor, thereby changing the output of the switching regulator.

It should be noted that the i-inductor is one of the attributes of an electronic circuit or device, and means: when the current changes, a certain large-volume fixed inductor or adjustable inductor (such as an oscillating coil, a choke coil and the like) which resists the current change electromotive force is generated due to electromagnetic induction, and the common I-shaped inductor is regarded as a vertical type of axial inductance, and is similar to the axial inductance in the aspect of application, but the common I-shaped inductor can have an inductance type with a larger volume, and the current can be naturally improved to a certain extent; most of the enameled wires (or yarn-covered wires) are directly wound on a magnetic core, and then can be made into different shapes according to actual requirements.

The LED driving device may be an LED (light emitting diode) itself.

Further, the deep dimming circuit further comprises an RF wireless signal transmission module, and the RF wireless signal transmission module is electrically connected with an external power supply and the pulse width modulation module. Fig. 2 is a circuit diagram of the RF wireless signal transmission module.

It should be noted that the PWM signal can be transmitted to the pulse width modulation module through the RF wireless signal transmission module, so that the pulse width modulation module can control the conduction of the field effect transistor according to the PWM signal with different duty ratios, and the working difficulty of the pulse width modulation module is reduced.

Further, referring to fig. 3, the pulse width modulation module includes a first resistor (R19), a second resistor (R20), a third resistor (R21), a first transistor (Q2), and a second transistor (Q3), the input end of the first resistor and the input end of the second resistor are respectively electrically connected with an external power supply, the output end of the first resistor is respectively and electrically connected with the collector electrode of the first triode and the base electrode of the second triode, the output end of the second resistor is respectively and electrically connected with the collector electrode of the second triode and the source electrode of the field effect transistor (Q7), the RF wireless signal transmission module is electrically connected (e.g. electrically connected) to an input terminal of the third resistor, the output end of the third resistor is electrically connected with the base electrode of the first triode, and the emitting electrode of the first triode and the emitting electrode of the second triode are both electrically connected with the source electrode of the field effect transistor.

It should be noted that, when the PWM signal is transmitted to the pulse width modulation module through the RF wireless signal transmission module, the PWM signal passes through R21 to energize the base of Q2, the external power voltage (e.g., 12V) passes through R19 to energize the collector of Q2 and the base of Q3, the external power voltage (e.g., 12V) passes through R20 to provide voltage to the collector of Q3 and the source of Q7, so that the fet Q7 is started, after the fet Q7 is started, the current flows from the external power source to the positive electrode, flows through the positive electrode of the LED driving device (LED6000k) to the negative electrode, lights up, and flows from the negative electrode of the LED driving device (LED6000k) to the i-inductor (L1) for filtering, and then flows through the fet Q7 to the ground. Therefore, the duty ratio of the PWM signal directly generates the on state of the fet Q7, so as to control the current flowing through the fet Q7, thereby realizing deep dimming and improving the dimming effect. In addition, the diode (VD1) is used for preventing current from backflushing when the fet Q7 is turned on, and protecting the fet Q7, so as to increase the safety of the deep dimming circuit and the lighting device thereof provided by the present invention.

Further, referring to fig. 4, a set of dimming modules is provided, where the dimming modules are two sets, namely a first dimming module and a second dimming module, the first dimming module and the second dimming module are respectively electrically connected to an external power source, the RF wireless signal transmission module is respectively electrically connected (electrically connected) to the pulse width modulation module of the first dimming module and the pulse width modulation module of the second dimming module, a cathode of a diode in the first dimming module is electrically connected to an anode of a warm white LED driving device (LED3000k), an output end of an i-shaped inductor in the first dimming module is electrically connected to a cathode of the warm white LED driving device (LED3000k), and a cathode of a diode in the second dimming module is electrically connected to an anode of a cold white LED driving device (LED6000K), the output end of the I-shaped inductor in the second dimming module is used for being electrically connected with the negative electrode of the cold white LED driving device (LED 6000K).

It should be noted that the first dimming module and the second dimming module include the same components, and the connection manner between the components is the same, specifically, the circuit diagram shown in fig. 3 is a circuit diagram of the first dimming module, in fig. 4, the second dimming module includes a first resistor (R22), a second resistor (R23), a third resistor (R23), a first triode (Q4) and a second triode (Q5), the input end of the first resistor and the input end of the second resistor are respectively electrically connected to an external power source, the output end of the first resistor is respectively electrically connected to the collector of the first triode and the base of the second triode, the output end of the second resistor is respectively electrically connected to the collector of the second triode and the source of the field effect transistor (Q6), the RF wireless signal transmission module is electrically connected (for example, electrically connected) with the input end of the additional third resistor, the output end of the additional third resistor is electrically connected with the base electrode of the additional first triode, and the emitting electrode of the additional first triode and the emitting electrode of the additional second triode are both electrically connected with the source electrode of the field effect transistor.

The dimming modes of the first dimming module and the second dimming module are consistent, deep dimming is realized according to PWM signals transmitted through the RF wireless signal transmission module, the RF wireless signal transmission module can transmit first PWM signals (PWM1 signals) to the first dimming module through a PM1 pin, the dimming of the warm white LED driving device is realized, the RF wireless signal transmission module can transmit second PWM signals (PWM2 signals) to the second dimming module through a PM2 pin, the dimming of the cold white LED driving device is realized, further, more flexible deep dimming is realized, and the illumination effect of the lighting equipment is increased.

The lighting device with deep dimming function provided by the present invention is described below, and the lighting device with deep dimming function described below and the deep dimming circuit described above may be referred to each other.

The lighting device with the deep dimming function provided by the utility model can comprise any one of the deep dimming circuit and the LED driving device, wherein the cathode of a diode in the deep dimming circuit is electrically connected with the anode of the LED driving device, and the input end of an I-shaped inductor in the deep dimming circuit is electrically connected with the cathode of the LED driving device.

Furthermore, referring to fig. 5, the lighting device with deep dimming function includes a pi-shaped filter module, a first rectifying filter module, a high-voltage inverter module, and a second rectifying filter module, wherein an input terminal of the pi-shaped filter module is electrically connected to an external power source, an output terminal of the pi-shaped filter module is electrically connected to an input terminal of the first rectifying filter module, an output terminal of the first rectifying filter module is electrically connected to the high-voltage inverter module, a first output terminal of the high-voltage inverter module is electrically connected to a first input terminal of the pulse width modulation module, a second output terminal of the high-voltage inverter module is electrically connected to an input terminal of the second rectifying filter module, and an output terminal of the second rectifying filter module is electrically connected to a second input terminal of the pulse width modulation module.

Further, referring to fig. 6, the pi-shaped filter module includes a voltage dependent resistor (VR1), a fuse (FU1), and a pi-shaped filter component (composed of T1, XC1, and XC 2), an input end of the voltage dependent resistor and an input end of the fuse are electrically connected to a live wire (L wire) of an external power supply, an output end of the fuse is electrically connected to a first input end of the pi-shaped filter component, an output end of the voltage dependent resistor and a second input end of the pi-shaped filter component are electrically connected to a zero wire (N wire) of the external power supply, a first output end of the pi-shaped filter component is electrically connected to a first input end of the first rectifying filter module, and a second output end of the pi-shaped filter component is electrically connected to a second input end of the first rectifying filter module.

The voltage of an external power supply (such as 220V commercial power) is subjected to voltage-sensitive electrical impedance surge through a VR1, and then is connected with an FU1 fuse tube, and the current passes through an XC1, a T1 and an XC2 to form an pi-shaped filter component to realize pi-shaped filtering.

Further, referring to fig. 7, the first rectifying and filtering module includes a rectifying bridge stack (UD1) and a first electrolytic capacitor (CD1), a first output terminal of the pi filter assembly is electrically connected to a first input terminal of the rectifying bridge stack, a second output terminal of the pi filter assembly is electrically connected to a second input terminal of the rectifying bridge stack, positive output terminals of the rectifying bridge stack are electrically connected to a positive electrode of the first electrolytic capacitor and a first input terminal of the high-voltage inverter module, respectively, and negative output terminals of the rectifying bridge stack are electrically connected to a negative electrode of the first electrolytic capacitor and a second input terminal of the high-voltage inverter module, respectively.

The current filtered by the Pi-shaped filtering module is rectified by the UD1 rectifier bridge stack and then filtered again by the DC1 electrolytic capacitor, so that the quality precision of the current and the voltage is ensured.

Further, referring to fig. 8, the second rectifying and filtering module includes a fourth resistor (R16), a fifth resistor (R17), a non-polar capacitor (C4), a first diode (D5), a second diode (D6), a second electrolytic capacitor (CD3), and a third electrolytic capacitor (CD4), the second output end of the high-voltage inverter module is electrically connected to the input end of the fourth resistor, the anode of the first diode, the anode of the second diode, and the input end of the fifth resistor, the output end of the fourth resistor is electrically connected to the input end of the non-polar capacitor, the output end of the non-polar capacitor, the cathode of the first diode, the cathode of the second diode, and the output end of the fifth resistor are electrically connected to the cathode of the diode in the deep dimming circuit, respectively, and the second electrolytic capacitor and the third electrolytic capacitor are connected in parallel to the cathode of the diode in the deep dimming circuit and the output end of the fifth resistor, respectively Between the input ends.

The current output after being processed by the high-voltage inversion module passes through an absorption circuit consisting of D5, D6, R16 and C4, is subjected to electrolytic filtering by CD3 and CD4, and then reaches the positive pole of an LED driving device (LED lamp bead).

Further, referring to fig. 9 and 10, the high-voltage inverter module includes a main control module, a high-voltage inverter sub-module, a current intensity monitoring sub-module, and an adjustment module, an output end of the first rectifier filter module is electrically connected to the main control module, the main control module is respectively electrically connected to the high-voltage inverter sub-module, the current intensity monitoring sub-module, and the adjustment control module, an output end of the high-voltage inverter sub-module is electrically connected to an input end of the second rectifier filter module, an output end of the second rectifier filter module is electrically connected to the current intensity monitoring sub-module, and the adjustment module is electrically connected to the high-voltage inverter sub-module.

It should be noted that the high-voltage inverter module may be a DC/DC high-voltage inverter module.

The overall circuit flow of the lighting device with deep dimming function may be as follows: 220V commercial power (an external power supply) passes through VR1 voltage-sensitive electrical impedance surge, then is connected with an FU1 safety tube, the current is subjected to 'pi' filtering by a pi-shaped filtering component consisting of XC1, T1 and XC2, the current filtered by the pi-shaped filtering module is rectified by a UD1 rectifying bridge stack and then is filtered again by a DC1 electrolytic capacitor, the current filtered by the first rectifying and filtering module passes through R1 and R2 to supply power to an integrated circuit U1 (a main control module), the integrated circuit U1 works, a Q1MOS tube is pushed by an output signal of a pin 8, the rear current passes through a T2 transformer wire group to a Q1MOS tube, then passes through R6 and R7 currents to be grounded, R1, R2, R3, C1, D1, T2, CD2, D3, D2, R2, Q2, R2 and R2 form a high-voltage-sensitive electrical impedance surge, then passes through a secondary lamp bead group, a secondary circuit, a DC 2 and a DC filtering module, and a DC 2 driving circuit module, and a DC 2 driving device, the positive electrode current output by the second rectifying and filtering module passes through a current intensity monitoring submodule consisting of R10, R12, R11, C3, R13, R14, R15 and U6, the monitoring result is fed back to an integrated circuit U1 by U5 and C2, and then adjustment control (adjustment module) can be carried out by a pin 2 of the integrated circuit U1, for example, the result of overlarge output current intensity is fed back to the integrated circuit U1, and the output current of the high-voltage inverter submodule is controlled by the integrated circuit U1; the secondary 2 route group of the T2 transformer is rectified and filtered through D4 and CD5, then the voltage is obtained through a small load R18 to obtain 12V voltage, the current passes through a U2 voltage stabilizer, the 3.3V voltage obtained after voltage stabilization is filtered through CD6, and then the power is supplied to the RF wireless signal transmission module through a 3.3V pin of the RF wireless module; the RF wireless module outputs a PWM1 signal to the first dimming module through a PM1 pin and outputs a PWM2 signal to the second dimming module through a PM2 pin; PWM1 signal drives Q7MOS through R19, Q2, Q3, R20, R21, after Q7MOS switches on, the current enters through 6000KLED +, 6000K LED-flows out, through I-shaped inductance L1, L1 filters and then through Q7MOS to ground; the PWM2 signal drives the Q6MOS through R22, Q4, Q5, R23 and R24, after the Q6MOS is conducted, the current enters through a 3000K LED +, flows out through a 3000K LED-, and is filtered through an I-shaped inductor L2 and L2 and then is grounded through the Q6 MOS.

According to the deep dimming circuit and the lighting device thereof, the pulse width modulation module controls the conduction of the field effect tube according to PWM signals with different duty ratios, the I-shaped inductor is combined to control the current flowing through the field effect tube, so that flexible deep dimming is realized, the dimming effect is improved, the lighting devices respectively emitting cold light and warm light are combined and adjusted to provide richer lighting effects, meanwhile, when the field effect tube is conducted, the diode can prevent current backflushing, and the use safety of the deep dimming circuit and the lighting device thereof is improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a degree of depth dimmer circuit, its characterized in that includes pulse width modulation module, field effect transistor, I-shaped inductance and diode, field effect transistor's source electrode is connected with external power source electricity, pulse width modulation module with field effect transistor's grid electricity is connected, field effect transistor's drain electrode respectively with I-shaped inductance's input with the anodal electricity of diode is connected, the negative pole of diode is used for being connected with LED drive arrangement's anodal electricity, I-shaped inductance's output is used for being connected with LED drive arrangement's negative pole electricity, field effect transistor's source electrode ground connection.

2. The deep dimming circuit of claim 1, further comprising an RF wireless signal transmission module electrically connecting an external power source and the pulse width modulation module.

3. The deep dimming circuit of claim 2, wherein the pulse width modulation module comprises a first resistor, a second resistor, a third resistor, a first transistor, and a second transistor, the input end of the first resistor and the input end of the second resistor are respectively electrically connected with an external power supply, the output end of the first resistor is respectively and electrically connected with the collector electrode of the first triode and the base electrode of the second triode, the output end of the second resistor is respectively and electrically connected with the collector electrode of the second triode and the grid electrode of the field effect transistor, the RF wireless signal transmission module is electrically connected with the input end of the third resistor, the output end of the third resistor is electrically connected with the base electrode of the first triode, and the emitting electrode of the first triode and the emitting electrode of the second triode are electrically connected with the source electrode of the field effect transistor.

4. The deep dimming circuit of claim 3, wherein a set of dimming modules is provided for one of the PWM modules, the FET, the I-shaped inductor, and the diode, the dimming modules are provided in two sets, namely a first dimming module and a second dimming module, the first dimming module and the second dimming module are respectively electrically connected to an external power source, the RF wireless signal transmission module is respectively electrically connected to the PWM module of the first dimming module and the PWM module of the second dimming module, the cathode of the diode in the first dimming module is electrically connected to the anode of the warm white LED driving device, the output end of the I-shaped inductor in the first dimming module is electrically connected to the cathode of the warm white LED driving device, the cathode of the diode in the second dimming module is electrically connected to the anode of the cool white LED driving device, and the output end of the I-shaped inductor in the second dimming module is used for being electrically connected with the cathode of the cold white LED driving device.

5. A lighting device with a deep dimming function, comprising the deep dimming circuit as claimed in any one of claims 1 to 4 and an LED driving device, wherein a cathode of a diode in the deep dimming circuit is electrically connected with an anode of the LED driving device, and an output end of an I-shaped inductor in the deep dimming circuit is electrically connected with a cathode of the LED driving device.

6. The lighting device with deep dimming function according to claim 5, comprising a pi-shaped filter module, a first rectifying filter module, a high voltage inverter module, and a second rectifying filter module, wherein an input terminal of the pi-shaped filter module is electrically connected to an external power source, an output terminal of the pi-shaped filter module is electrically connected to an input terminal of the first rectifying filter module, an output terminal of the first rectifying filter module is electrically connected to the high voltage inverter module, a first output terminal of the high voltage inverter module is electrically connected to a first input terminal of the pulse width modulation module, a second output terminal of the high voltage inverter module is electrically connected to an input terminal of the second rectifying filter module, and an output terminal of the second rectifying filter module is electrically connected to a second input terminal of the pulse width modulation module.

7. The lighting device with deep dimming function of claim 6, wherein the pi-shaped filter module comprises a voltage dependent resistor, a fuse and a pi-shaped filter component, an input end of the voltage dependent resistor and an input end of the fuse are electrically connected to a live wire of an external power supply respectively, an output end of the fuse is electrically connected to the first input end of the pi-shaped filter component, an output end of the voltage dependent resistor and the second input end of the pi-shaped filter component are electrically connected to a zero wire of the external power supply respectively, the first output end of the pi-shaped filter component is electrically connected to the first input end of the first rectifying filter module, and the second output end of the pi-shaped filter component is electrically connected to the second input end of the first rectifying filter module.

8. The lighting device with deep dimming function according to claim 6, wherein the first rectifying and filtering module comprises a rectifying bridge stack and a first electrolytic capacitor, the first output terminal of the pi-shaped filtering component is electrically connected to the first input terminal of the rectifying bridge stack, the second output terminal of the pi-shaped filtering component is electrically connected to the second input terminal of the rectifying bridge stack, the positive output terminals of the rectifying bridge stack are electrically connected to the positive electrode of the first electrolytic capacitor and the first input terminal of the high voltage inverter module, respectively, and the negative output terminal of the rectifying bridge stack is electrically connected to the negative electrode of the first electrolytic capacitor and the second input terminal of the high voltage inverter module, respectively.

9. The illumination device with deep dimming function of claim 6, wherein the second rectifying and filtering module comprises a fourth resistor, a fifth resistor, a non-polar capacitor, a first diode, a second electrolytic capacitor, and a third electrolytic capacitor, the second output terminal of the high voltage inverter module is electrically connected to the input terminal of the fourth resistor, the anode of the first diode, the anode of the second diode, and the input terminal of the fifth resistor, respectively, the output terminal of the fourth resistor is electrically connected to the input terminal of the non-polar capacitor, the output terminal of the non-polar capacitor, the cathode of the first diode, the cathode of the second diode, and the output terminal of the fifth resistor are electrically connected to the cathode of the diode in the deep dimming circuit, respectively, and the second electrolytic capacitor and the third electrolytic capacitor are electrically connected in parallel to the cathode of the diode in the deep dimming circuit and the cathode of the fifth resistor, respectively Between the input ends.

10. The lighting device with deep dimming function according to claim 6, wherein the high voltage inverting module comprises a main control module, a high voltage inverting sub-module, a current intensity monitoring sub-module, and an adjusting module, the output end of the first rectifying and filtering module is electrically connected to the main control module, the main control module is electrically connected to the high voltage inverting sub-module, the current intensity monitoring sub-module, and the adjusting module respectively, the output end of the high voltage inverting sub-module is electrically connected to the input end of the second rectifying and filtering module, the output end of the second rectifying and filtering module is electrically connected to the current intensity monitoring sub-module, and the adjusting module is electrically connected to the high voltage inverting sub-module.