CN116234099A - Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp - Google Patents

Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp Download PDF

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Publication number
CN116234099A
CN116234099A CN202211718232.1A CN202211718232A CN116234099A CN 116234099 A CN116234099 A CN 116234099A CN 202211718232 A CN202211718232 A CN 202211718232A CN 116234099 A CN116234099 A CN 116234099A
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CN
China
Prior art keywords
voltage
circuit
output
compensation
control device
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Pending
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CN202211718232.1A
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Chinese (zh)
Inventor
侯久长
陆益多
周家旺
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Zhuhai Ltech Technology Co ltd
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Zhuhai Ltech Technology Co ltd
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Priority to CN202211718232.1A priority Critical patent/CN116234099A/en
Publication of CN116234099A publication Critical patent/CN116234099A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The invention discloses an intelligent lamp, a dimming control circuit thereof and a dimming control method of the intelligent lamp, wherein the dimming control circuit comprises an input terminal and an output terminal, a phase-cut circuit is arranged between the input terminal and the output terminal, and the phase-cut circuit receives a control signal output by the control circuit; the compensation circuit comprises a rectifying circuit, wherein the output end of the rectifying circuit is connected with a compensation loop, and the compensation loop comprises a compensation resistor module and a current control device which are connected in series; the compensation circuit also comprises a control loop, the control loop comprises a controllable voltage stabilizing source, the control end of the controllable voltage stabilizing source receives the voltage output by the voltage dividing circuit, and the voltage output by the voltage dividing circuit rises along with the rising of the voltage output by the output terminal. The intelligent lamp is provided with the dimming control circuit, and the dimming control circuit is used for dimming. The invention can avoid noise generated by the driving circuit and flicker of the LED chip.

Description

Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp
Technical Field
The invention relates to the technical field of intelligent lamp control, in particular to a dimming control circuit of an intelligent lamp and a dimming control method of the intelligent lamp.
Background
With the development of intelligent household technology, the current household appliances are more and more intelligent, and the intelligent lamp is a common intelligent appliance. The existing intelligent lamp is generally provided with an LED chip, and the luminous brightness of the LED chip can be adjusted through a dimmer, so that the dimming of the intelligent lamp is realized.
Along with the continuous development of dimming technology, various dimming technologies are layered endlessly, wherein the silicon controlled dimming technology is a common dimming technology, and the dimming technology has the advantage of simple installation mode and is completely compatible with the traditional LED light source drive on an input/output circuit interface. If the traditional LED light source driving mode is replaced by the silicon controlled rectifier dimming mode, the traditional LED light source driving is replaced by the LED light source driving capable of supporting the silicon controlled rectifier dimming, and the original wall switch is replaced by the silicon controlled rectifier dimmer, so that the silicon controlled rectifier dimming technology is widely applied in the intelligent lamp reconstruction process.
Currently, the silicon controlled dimming technology has two dimming modes, namely a front edge control mode and a back edge control mode, and specific waveforms of the two control modes are described in an invention patent application with publication number of CN 112738943A. Regardless of the leading edge control mode and the trailing edge control mode, the sine signal needs to be chopped according to the dimming proportion, and the chopping is usually realized by using a phase-cut circuit. The phase-cutting circuit is provided with a switching device, such as a field effect transistor, and the chopping proportion is adjusted by controlling the on-off time of the field effect transistor.
However, the phase-cut circuit needs to be used in combination with the driving power supply of the intelligent lamp, but because the different driving power supplies have different requirements on the phase-cut circuit, the phase-cut circuit is incompatible with the driving circuit, and larger noise is generated during dimming. For example, when the chopping ratio is high, the waveform output by the phase-cut circuit is severely distorted, and the output voltage is low, so that the driving circuit generates larger noise, and the user experience is affected.
Disclosure of Invention
The first object of the present invention is to provide a dimming control circuit for a smart lamp, which can effectively reduce noise caused by too low output voltage after phase-cut.
The second object of the invention is to provide a smart lamp with the dimming control circuit of the smart lamp.
The third objective of the present invention is to provide a dimming control method for the intelligent lamp.
In order to achieve the first object, the dimming control circuit of the intelligent lamp provided by the invention comprises an input terminal and an output terminal, wherein a phase-cut circuit is arranged between the input terminal and the output terminal, and the phase-cut circuit receives a control signal output by the control circuit; the compensation circuit comprises a rectifying circuit, wherein the output end of the rectifying circuit is connected with a compensation loop, and the compensation loop comprises a compensation resistor module and a current control device which are connected in series; the compensation circuit further comprises a control loop, the control loop comprises a controllable voltage stabilizing source, the control end of the controllable voltage stabilizing source receives the voltage output by the voltage dividing circuit, the voltage output by the voltage dividing circuit rises along with the rising of the voltage output by the output terminal, the output voltage of the controllable voltage stabilizing source decreases along with the rising of the output voltage of the voltage dividing circuit, the controllable voltage stabilizing source outputs a signal to the control end of the current control device, and the on-state current of the current control device rises along with the rising of the output voltage of the controllable voltage stabilizing source.
According to the scheme, the compensation circuit is arranged between the output terminals to compensate the voltage output by the phase splitting circuit, when the voltage output by the output terminals is lower, the voltage output by the voltage dividing circuit is lower, the voltage received by the control end of the controllable voltage stabilizing source is lower, but the output voltage is higher, so that the conduction current of the current control device is increased. Because the current control device is connected with the compensation resistor module in series, when the on current of the current control device increases, the voltage of the compensation loop increases, and the compensation voltage applied between the output terminals also increases. Thus, when the output voltage of the output terminal is low, the compensation circuit can provide high compensation voltage, so that noise generated by the driving power supply due to the fact that the voltage is too low is avoided.
In a preferred embodiment, the compensation resistor module comprises two compensation resistor groups, and the current control device is connected between the two compensation resistor groups in series.
Therefore, by arranging two groups of compensation resistor groups connected in series, the resistance value of the compensation resistor module can be increased, and the compensation voltage can be improved.
In a preferred embodiment, at least one compensation resistor group comprises more than two compensation resistors arranged in parallel.
Therefore, by arranging a plurality of parallel compensation resistors, once one compensation resistor is abnormal, other compensation resistors in the compensation resistor group work, so that the stability of the work of the compensation resistor module is ensured.
The voltage dividing circuit comprises a first voltage dividing module and a second voltage dividing module which are connected in series, wherein the first voltage dividing module is connected to the output end of the rectifying circuit, the second voltage dividing module is grounded, and the control end of the controllable voltage stabilizing source is connected between the first voltage dividing module and the second voltage dividing module; a first voltage stabilizing tube is arranged between the first voltage dividing module and the control end of the controllable voltage stabilizing source.
Therefore, the voltage output by the voltage dividing circuit can be ensured to fluctuate within a certain range through the first voltage stabilizing tube, the condition that the voltage output by the voltage dividing circuit is too high or too low is avoided, and the output voltage of the controllable voltage stabilizing source fluctuates within a certain range, so that the on current of the current control device can fluctuate within a certain range.
Further, the second voltage dividing module comprises a first voltage dividing resistor and a second voltage dividing resistor which are connected in parallel, and the second voltage dividing resistor is connected in series with the voltage dividing control device.
Therefore, the resistance value of the second voltage division module can be changed by controlling the on and off of the voltage division control device, so that the voltage range output by the voltage division circuit is adjusted, and the compensation circuit has a larger compensation range.
In a further scheme, the control end of the voltage division control device is connected to a voltage division control branch, the voltage division control branch is provided with a second voltage stabilizing tube, and the second voltage stabilizing tube is connected between the output end of the rectifying circuit and the control end of the voltage division control device.
Therefore, if the voltage output by the output terminal is lower, the second voltage stabilizing tube is not conducted, and the second voltage dividing resistor is not connected into the circuit, so that the resistance value of the second voltage dividing module is increased. In practice, the conduction of the voltage division control device is determined by the voltage magnitude of the output terminal, so that the magnitude of the conduction current of the current control device can be adjusted according to the voltage magnitude of the output terminal, so that the range of the compensation voltage is larger.
In a further scheme, the current control device is a field effect transistor.
In order to achieve the second object, the intelligent lamp provided by the invention comprises a driving circuit, an LED chip and a dimming control circuit of the intelligent lamp, wherein the dimming control circuit outputs a signal to the driving circuit, and the driving circuit supplies power to the LED chip.
In order to achieve the third object, the dimming control method of the intelligent lamp provided by the invention is applied to an intelligent lamp, the intelligent lamp is provided with the dimming control circuit of the intelligent lamp, and the method comprises the following steps: when the output voltage of the output terminal increases, the on current of the current control device decreases, and the compensation voltage loaded on the output terminal decreases; when the output voltage of the output terminal decreases, the on current of the current control device increases, and the compensation voltage applied to the output terminal increases.
As can be seen from the above, when the voltage output from the output terminal decreases, the compensation voltage output from the compensation circuit increases, thereby compensating the voltage output from the output terminal. When the output voltage of the output terminal is increased, the compensation voltage is reduced, and noise generated due to too low voltage applied to the LED chip is avoided.
Further, the method further comprises: when the output voltage of the output terminal is higher than a preset voltage threshold, the voltage division control device is turned on, and when the output voltage of the output terminal is lower than the preset voltage threshold, the voltage division control device is turned off.
Therefore, the resistance value of the second voltage dividing resistor module can be changed by controlling the on and off of the voltage dividing control device, so that the on current of the current control device is changed, and the compensation voltage is changed. Therefore, when the output voltage of the output terminal is lower than the preset voltage threshold value, the compensation capability of the compensation circuit can be improved, so that the compensation voltage range of the compensation circuit is wider.
Drawings
Fig. 1 is an electrical schematic diagram of an embodiment of a dimming control circuit for a smart light fixture of the present invention.
Fig. 2 is an electrical schematic diagram of a compensation circuit in an embodiment of a dimming control circuit for a smart luminaire of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
The intelligent lamp provided by the invention is provided with a driving circuit and an LED chip, and uses a silicon controlled dimmer to perform dimming, wherein the intelligent lamp is provided with a dimming control circuit, the dimming control circuit can output signals to the driving circuit, and the driving circuit supplies power to the LED chip.
Referring to fig. 1, the dimming control circuit of the intelligent lamp has two input terminals N1, L1, and the input terminals N1, L1 receive alternating current. The dimming control circuit is further provided with two output terminals N2, L2, and the two output terminals N2, L2 output alternating current to the driving circuit. The phase-cut circuit 11 is connected between the input terminal and the output terminal, the phase-cut circuit 11 comprises two switching devices, namely field effect transistors Q4 and Q5, the phase-cut circuit 11 also receives control signals output by the control circuit 13, the control circuit 13 comprises a singlechip, and the singlechip outputs control signals to the field effect transistors Q4 and Q5 to control the on and off of the field effect transistors Q4 and Q5. The dimming control circuit is further provided with a power supply circuit 12, and the power supply circuit 12 obtains ac power from the input terminals N1, L1, and converts the ac power into low-voltage dc power to supply power to the control circuit 13.
The input terminals N1, L1 receive a sine wave signal which can flow through the field effect transistors Q4, Q5. The control circuit 13 determines the chopping ratio of the sine wave signal according to the dimming ratio, calculates the on time and the off time of the field effect transistors Q4 and Q5 from the chopping ratio, and outputs control signals to the control field effect transistors Q4 and Q5, thereby realizing chopping of the input sine wave signal. When the user desires the light-emitting brightness of the LED chip to be smaller, the control signal output by the control circuit 13 makes the on time of the field effect transistors Q4 and Q5 shorter, that is, the chopping ratio is higher, and the voltage waveforms output by the output terminals N2 and L2 will be distorted. In this way, the voltage output to the driving circuit of the subsequent stage is also distorted, so that the LED chip is flashed, and the driving circuit is also caused to generate large noise.
To avoid this problem, the present embodiment provides the compensation circuit 14, and the compensation circuit 14 is connected between the two output terminals N2, L2. Referring to fig. 2, the compensation circuit 14 is provided with a rectifying circuit DB1, and one full-bridge rectifying circuit for rectifying the circuit DB1 receives the alternating current output from the output terminals N2, L2 and converts the alternating current output from the output terminals N2, L2 into direct current. When the voltage of the alternating current output by the output terminals N2 and L2 is high, the voltage of the rectified direct current is also high, and when the voltage of the alternating current output by the output terminals N2 and L2 is low, the voltage of the rectified direct current is also low.
The compensation circuit 14 is further provided with a compensation circuit, which in this embodiment comprises a series connection of compensation resistor modules and a current control device. The compensation resistor module comprises two groups of compensation resistors, and each group of compensation resistors comprises more than two compensation resistors which are arranged in parallel. For example, the first compensation resistor group comprises three parallel compensation resistors R25, R26, R27, and the second compensation resistor group comprises three parallel compensation resistors R38, R40, R41. The current control device is a field effect transistor Q7, and the field effect transistor Q7 is connected between two compensation resistor groups in series. Since the on-current of the fet Q7 can be changed according to the voltage of the gate, when the on-current of the fet Q7 increases, the current of the compensation circuit increases, and the current flowing through the two compensation resistor groups also increases, so that the voltage of the compensation circuit increases, that is, the compensation voltage of the compensation circuit 14 increases. Conversely, when the on-current of the fet Q7 decreases, the current of the compensation circuit decreases, and the current flowing through the two compensation resistor groups also decreases, so that the voltage of the compensation circuit decreases, that is, the compensation voltage of the compensation circuit 14 decreases. Therefore, the magnitude of the compensation voltage can be controlled by controlling the magnitude of the on-current of the current control device.
In this embodiment, the compensation circuit is provided with a control loop, the control loop is provided with a controllable voltage stabilizing source U3, the controllable voltage stabilizing source U3 is connected in series with resistors R23 and R30, a first end of the controllable voltage stabilizing source is connected to a point A, and the point A is connected to the grid electrode of the field effect transistor Q7 through a resistor R33 and a resistor R34. The on-state current of the field effect transistor Q7 is related to the voltage of the gate, that is, the higher the gate voltage of the field effect transistor Q7 is, the larger the on-state current is, so that the voltage of the point a can be controlled to control the on-state current of the field effect transistor Q7.
The control end of the controllable voltage stabilizing source U3 is connected to the point B, so that the voltage of the first end of the controllable voltage stabilizing source U3, namely the voltage of the point A, can be controlled by controlling the voltage of the point B. In order to control the voltage of the point B, a voltage dividing circuit is disposed in the compensation circuit, where the voltage dividing circuit of the present embodiment includes a first voltage dividing module and a second voltage dividing module connected in series, the first voltage dividing module includes resistors R24, R31, R32 connected in series, and the resistor R32 is connected in parallel with the first voltage stabilizing tube ZD 1. The second voltage dividing module includes two parallel-connected first voltage dividing resistors R43 and R77, and the second voltage dividing resistor R77 is connected in series with a voltage dividing control device, which is a field effect transistor Q9 in this embodiment.
As can be seen from fig. 2, the first voltage dividing module is connected to the output end of the rectifying circuit DB1, the second voltage dividing module is grounded, and the control end of the controllable voltage stabilizing source U3 is connected between the first voltage dividing module and the second voltage dividing module, that is, the point B is between the first voltage dividing module and the second voltage dividing module. When the voltage between the output terminals N2 and L2 is increased, the voltage of the point B is also increased, so that the voltage of the control end of the controllable voltage stabilizing source U3 is increased; when the voltage between the output terminals N2 and L2 decreases, the voltage at the point B also decreases, so that the voltage at the control terminal of the controllable voltage stabilizing source U3 decreases. In this embodiment, the output voltage of the controllable voltage-stabilizing source U3 decreases with increasing output voltage of the voltage-dividing circuit, that is, when the voltage at the point B increases, the voltage at the point a decreases, so that the voltage at the point a and the voltage at the point B have an inverse relationship.
Because the first voltage stabilizing tube ZD1 on the first voltage dividing module has a conducting voltage, that is, the voltage difference between two ends of the first voltage stabilizing tube ZD1 needs to be larger than a conducting threshold value to conduct, when the voltage output by the rectifying circuit DB1 is lower, the first voltage stabilizing tube ZD1 is not conducted, when the voltage output by the rectifying circuit DB1 is higher, the first voltage stabilizing tube ZD1 can conduct, and after the first voltage stabilizing tube ZD1 conducts, the voltage between two ends of the first voltage stabilizing tube ZD1 can be kept stable, so that the voltage of the point B can change within a certain range of values.
In addition, a voltage division control branch is further disposed in the compensation circuit 14, and the voltage division control branch includes resistors R72, R73, R75, a second zener diode ZD4, and a resistor R71 connected in series, where the resistor R71 is connected in parallel with the capacitor C17, and a gate, i.e., a control end, of the field effect transistor Q9 is connected to a point C, and the point C is located between the second zener diode ZD4 and the resistor R71. The two ends of the voltage division control branch are respectively connected with the output end of the rectifying circuit DB1 and the ground, so that when the voltage output by the rectifying circuit DB1 rises, the voltage at the point C rises, and when the voltage output by the rectifying circuit DB1 falls, the voltage at the point C falls.
Because the voltage division control branch circuit is provided with the second voltage stabilizing tube ZD4, and the second voltage stabilizing tube ZD4 has conducting voltage, when the voltage difference between two ends of the second voltage stabilizing tube ZD4 is smaller, for example, when the output voltage of the output terminal is smaller than a preset voltage threshold, the second voltage stabilizing tube ZD4 is not conducting, at this time, point C is a low-level signal, the field effect tube Q9 serving as a voltage division control device is cut off, at this time, the second voltage division module only has the resistor R43, and the resistance value is larger. When the output voltage of the output terminal is higher than a preset voltage threshold, the second voltage stabilizing tube ZD4 is conducted, at the moment, the point C is a low-high level signal, the field effect tube Q9 serving as a voltage division control device is conducted, at the moment, the resistor R77 is connected into a circuit, the resistance value of the second voltage division module is the resistance value after the resistor R43 and the resistor R77 are connected in parallel, and the resistance value is smaller. In the embodiment, voltage compensation in two different voltage ranges is realized by controlling the on and off of the field effect transistor Q9.
If the voltage between the output terminals N2, L2 fluctuates in the first voltage range, for example, between 170V and 250V, the second regulator ZD4 can keep on state all the time, and point C is a high level signal, so that the field effect transistor Q9 is in on state, and the resistor R77 is connected to the circuit. When phase cutting is serious, that is, when the chopping ratio is high, the voltage waveform distortion between the output terminals N2 and L2 is serious, the voltage output by the rectifying circuit DB1 is low, for example, when the voltage is between 170V and 180V, the voltage at the point B is low, the voltage at the control end of the controllable voltage stabilizing source U3 is low, so that the voltage at the point a is high, and the on current of the field effect transistor Q7 is high. When the voltage between the output terminals N2 and L2 increases, the voltage at the point B increases, so that the voltage at the point a decreases, and the on-current of the fet Q7 decreases.
When the on-current of the fet Q7 increases, the current of the compensation circuit increases, and the current flowing through the two compensation resistor sets also increases, so that the voltage of the compensation circuit increases, that is, the compensation voltage of the compensation circuit 14 increases. It can be seen that the voltage between the output terminals N2, L2
When the voltage received by the driving circuit 5 is too low, the LED chip flashes, and the driving circuit generates noise.
If the voltage between the output terminals N2, L2 fluctuates in a second voltage range, for example, between 90V and 170V, the second regulator ZD4 is not turned on, the fet Q9 is in an off state, the resistor R77 is not connected to the circuit, the second voltage divider module has only the resistor R43,
compared with the on state of the field effect transistor Q9, the resistance value of the second voltage division module is larger, so that the voltage at the point B0 can be changed in another voltage range, and correspondingly, the voltage at the point A can be changed in another range.
The FET Q9 will remain off when the voltage between the output terminals N2, L2 fluctuates between 90V and 170V, A will be turned off when the voltage between the output terminals N2, L2 decreases
The dot voltage will rise so that the on-current of the field effect transistor Q7 continues to increase so that the compensation voltage of the compensation circuit 5 increases. Therefore, the present embodiment can realize voltage compensation of a wide range of voltages between 90V and 250V between the output terminals N2, L2.
Of course, the above-mentioned scheme is only a preferred embodiment of the present invention, and many more variations are possible in practical application, for example, the number of the selected voltage dividing resistors is changed, and the like, which do not affect the implementation of the present invention, and should be included in the protection scope of the present invention.

Claims (10)

1. Dimming control circuit of intelligent lamps and lanterns includes:
the phase-cut circuit is arranged between the input terminal and the output terminal and receives a control signal output by the control circuit;
the method is characterized in that:
a compensation circuit is connected between the output terminals, the compensation circuit comprises a rectification circuit, the output end of the rectification circuit is connected with a compensation loop, and the compensation loop comprises a compensation resistor module and a current control device which are connected in series;
the compensation circuit further comprises a control loop, the control loop comprises a controllable voltage stabilizing source, the control end of the controllable voltage stabilizing source receives the voltage output by the voltage dividing circuit, the voltage output by the voltage dividing circuit rises along with the rising of the voltage output by the output terminal, the output voltage of the controllable voltage stabilizing source decreases along with the rising of the output voltage of the voltage dividing circuit, the controllable voltage stabilizing source outputs a signal to the control end of the current control device, and the conducting current of the current control device rises along with the rising of the output voltage of the controllable voltage stabilizing source.
2. The dimming control circuit of a smart luminaire of claim 1, wherein:
the compensation resistor module comprises two groups of compensation resistor groups, and the current control device is connected between the two groups of compensation resistor groups in series.
3. The dimming control circuit of a smart luminaire of claim 2, wherein:
at least one compensating resistor group comprises more than two compensating resistors which are arranged in parallel.
4. A dimming control circuit for a smart luminaire as claimed in any one of claims 1 to 3, characterized in that:
the voltage dividing circuit comprises a first voltage dividing module and a second voltage dividing module which are connected in series, the first voltage dividing module is connected to the output end of the rectifying circuit, the second voltage dividing module is grounded, and the control end of the controllable voltage stabilizing source is connected between the first voltage dividing module and the second voltage dividing module;
and a first voltage stabilizing tube is arranged between the first voltage dividing module and the control end of the controllable voltage stabilizing source.
5. The dimming control circuit of a smart luminaire of claim 4, wherein:
the second voltage dividing module comprises a first voltage dividing resistor and a second voltage dividing resistor which are connected in parallel, and the second voltage dividing resistor is connected in series with a voltage dividing control device.
6. The intelligent light fixture dimming control circuit of claim 5, wherein:
the control end of the voltage division control device is connected to the voltage division control branch, the voltage division control branch is provided with a second voltage stabilizing tube, and the second voltage stabilizing tube is connected between the output end of the rectifying circuit and the control end of the voltage division control device.
7. A dimming control circuit for a smart luminaire as claimed in any one of claims 1 to 3, characterized in that:
the current control device is a field effect transistor.
8. Intelligent lamps and lanterns, its characterized in that includes:
a driving circuit, an LED chip, and a dimming control circuit of the intelligent light fixture as claimed in any one of claims 1 to 7, the dimming control circuit outputting a signal to the driving circuit, the driving circuit powering the LED chip.
9. A dimming control method of a smart luminaire provided with a dimming control circuit of the smart luminaire as claimed in any one of claims 1 to 7, characterized in that the method comprises:
when the output voltage of the output terminal rises, the on-current of the current control device is reduced, and the compensation voltage loaded on the output terminal is reduced;
when the output voltage of the output terminal decreases, the on-current of the current control device increases, and the compensation voltage applied to the output terminal increases.
10. A dimming control method of a smart luminaire provided with a dimming control circuit of the smart luminaire as claimed in claim 6, characterized in that the method comprises:
when the output voltage of the output terminal rises, the on-current of the current control device is reduced, and the compensation voltage loaded on the output terminal is reduced; when the output voltage of the output terminal is reduced, the on current of the current control device is increased, and the compensation voltage loaded on the output terminal is increased;
and when the output voltage of the output terminal is higher than a preset voltage threshold value, the voltage division control device is turned on, and when the output voltage of the output terminal is lower than the preset voltage threshold value, the voltage division control device is turned off.
CN202211718232.1A 2022-12-29 2022-12-29 Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp Pending CN116234099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211718232.1A CN116234099A (en) 2022-12-29 2022-12-29 Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211718232.1A CN116234099A (en) 2022-12-29 2022-12-29 Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp

Publications (1)

Publication Number Publication Date
CN116234099A true CN116234099A (en) 2023-06-06

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Application Number Title Priority Date Filing Date
CN202211718232.1A Pending CN116234099A (en) 2022-12-29 2022-12-29 Intelligent lamp, dimming control circuit thereof and dimming control method of intelligent lamp

Country Status (1)

Country Link
CN (1) CN116234099A (en)

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