CN109348570B - Dimming driving circuit, dimming controller and LED lamp - Google Patents
Dimming driving circuit, dimming controller and LED lamp Download PDFInfo
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- CN109348570B CN109348570B CN201811167036.3A CN201811167036A CN109348570B CN 109348570 B CN109348570 B CN 109348570B CN 201811167036 A CN201811167036 A CN 201811167036A CN 109348570 B CN109348570 B CN 109348570B
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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]
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a dimming driving circuit, which comprises an EMI filtering rectifying circuit, an active PFC circuit and a dimming control circuit which are connected in sequence, and is characterized in that: the power supply circuit comprises an active PFC circuit, a dimming signal detection circuit and a dimming control circuit, wherein the input end of the dimming signal detection circuit is connected with the active PFC circuit, the output end of the dimming signal detection circuit is connected with the power end of the dimming signal detection circuit, the input end of the dimming signal detection circuit is respectively connected with a dimming switch and an infrared receiving head, and the output end of the dimming signal detection circuit is connected with the dimming control circuit. The dimming signal detection circuit is respectively connected with the dimming switch and the infrared receiving head, so that the wall switch can be used for dimming and the remote controller can be used for dimming.
Description
Technical Field
The invention relates to the technical field of LED dimming driving, in particular to a dimming driving circuit.
Background
LEDs are a new generation of lighting sources, and have very fast market penetration due to their high luminous efficiency, low energy consumption, long lifetime, no mercury, and good dimming properties. In order to create a more comfortable lighting atmosphere and save energy, research on LED dimming technology is extremely important. At present, two main current dimming modes in the market are switch sectional dimming and remote controller dimming. However, many existing LED power dimmers have only a single dimming mode.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a dimming driving circuit which is used for solving the problem that the dimming mode of the existing LED power supply is single.
The invention comprises the following steps:
the utility model provides a drive circuit adjusts luminance, includes EMI filtering rectifier circuit, active PFC circuit and the control circuit that adjusts luminance that connects gradually, its characterized in that: the power supply circuit comprises an active PFC circuit, a dimming signal detection circuit and a dimming control circuit, wherein the input end of the dimming signal detection circuit is connected with the active PFC circuit, the output end of the dimming signal detection circuit is connected with the power end of the dimming signal detection circuit, the input end of the dimming signal detection circuit is respectively connected with a dimming switch and an infrared receiving head, and the output end of the dimming signal detection circuit is connected with the dimming control circuit.
Preferably, the dimming signal detection circuit includes a micro-processing unit U4, a first input pin of the micro-processing unit U4 is connected with the dimming switch through a first voltage division filter circuit, a second input pin of the micro-processing unit U4 is connected with the infrared receiving head, a power pin of the micro-processing unit U4 is connected with an output end of the voltage stabilizing power supply circuit, a first output pin of the micro-processing unit U4 is connected with a first RC parallel filter circuit through a resistor R48 and is used for outputting a first PWM dimming signal, and a second output pin of the micro-processing unit U4 is connected with a second RC parallel filter circuit through a resistor R51 and is used for outputting a second PWM dimming signal.
Preferably, the third output pin of the microprocessor unit U4 is connected to the base of the triode Q3 through a resistor R43, and the collector of the triode Q3 is connected to a buzzer F1.
Preferably, the dimming control circuit comprises a first dimming circuit and a second dimming circuit with the same structure, the first dimming circuit comprises an LED dimming chip U3 and an MOS tube Q2, an enabling pin of the dimming chip U3 is connected with a resistor R48 and used for receiving the first PWM dimming signal, a power pin of the dimming chip U3 is connected with a resistor R40, the resistor R40 is connected to a grid electrode of the MOS tube Q2, the resistor R40 is grounded through a pull-down resistor R41, a control pin of the dimming chip U3 is connected with a source electrode of the MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with the active PFC circuit through a second split filter circuit and is connected with the LED lamp through a common mode inductor TL 3.
Preferably, the active PFC circuit is configured to provide a first working voltage DC-400V, and includes a PFC control chip U2 and a boost chopper circuit, where the boost chopper circuit includes a transformer TR1, a MOS transistor Q1, a freewheeling diode, a load resistor and a filter capacitor CE1, one end of a primary coil of the transformer TR1 is connected to the EMI filter rectifier circuit, the other end is connected to an anode of the freewheeling diode, a secondary coil of the transformer TR1 is connected to the PFC control chip U2, and is configured to provide a working power supply for the PFC control chip U2, an output end of the PFC control chip U2 is connected to a gate of the MOS transistor Q2, and is configured to control a waveform of a gate voltage, a drain electrode of the MOS transistor Q2 is connected to an anode of the freewheeling diode, a source electrode of the MOS transistor Q2 is grounded, and one end of the load resistor and the filter capacitor CE1 are connected in parallel.
Preferably, the output end of the active PFC circuit is connected to a diode D3, a first voltage dividing resistor and a second voltage dividing resistor, and the second operating voltage VCC1 and the third operating voltage VCC2 are provided through the first voltage dividing resistor and the second voltage dividing resistor, respectively.
Preferably, the voltage stabilizing power supply circuit comprises a voltage reducing chip U1, a high-voltage pin of the voltage reducing chip U1 is connected with an output end of the active PFC circuit, the high-voltage pin of the voltage reducing chip U1 is grounded through a filter capacitor CE4, an output pin of the voltage reducing chip U1 is connected with one end of a load resistor R31 through an inductor L4 and is used for outputting a fourth working voltage 5V1, the other end of the load resistor R31 is grounded, a power pin of the voltage reducing chip U1 is connected with an output pin of the voltage reducing chip U1 through a starting capacitor C5, a connection node between the voltage reducing chip U1 and the inductor L4 is connected with a freewheeling diode D7, an anode of the freewheeling diode D7 is grounded, and two ends of the load resistor R31 are connected with an energy storage capacitor CE5 in parallel.
The invention also discloses a dimming controller which comprises a shell and an infrared remote controller, wherein a dimming switch is arranged on the shell, and the dimming driving circuit is arranged in the shell.
The invention also discloses an LED lamp, which comprises the dimming driving circuit and an LED lamp connected with the dimming driving circuit.
The beneficial effects of the invention are as follows: the dimming signal detection circuit is respectively connected with the dimming switch and the infrared receiving head, so that the wall switch can be used for dimming and the remote controller can be used for dimming.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of an EMI filtering rectifier circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an active PFC circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a voltage regulator circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a dimming signal detection circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a dimming control circuit according to an embodiment of the present invention.
Detailed Description
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Referring to fig. 1-2, the embodiment of the disclosure includes an EMI filter rectifying circuit 1, an active PFC circuit 2, and a dimming control circuit 3, which are sequentially connected, and further includes a voltage-stabilizing power supply circuit 4 and a dimming signal detection circuit 5, wherein an input end of the voltage-stabilizing power supply circuit 4 is connected to the active PFC circuit 2, an output end thereof is connected to a power end of the dimming signal detection circuit 5, and an input end of the dimming signal detection circuit 5 is respectively connected to a dimming switch and an infrared receiving head, and an output end thereof is connected to the dimming control circuit 3.
Referring to fig. 3, the EMI filter rectifying circuit 1 includes a fuse FR1, a varistor RV1, a differential mode suppression circuit 11, and a rectifying circuit 12, wherein the varistor RV1 is connected in parallel between a phase line input end L and a zero line input end N, one end of the fuse FR1 is connected to the phase line input end L, the other end is connected to the varistor RV1, and a resistor R5 and a resistor R10 are connected in series and then connected in parallel to the varistor RV1. The differential mode suppression circuit 11 includes differential mode suppression inductors L1 and L2, differential mode suppression capacitors CX1 and CX2, and a common mode suppression inductor TL1, the rectifier circuit 12 includes a rectifier bridge DB1, one end of the differential mode suppression inductor L1 is connected to the zero line input terminal N, the other end thereof is connected to one end of a first winding of the common mode suppression inductor TL1, the other end of the first winding is connected to a first input terminal of the rectifier bridge DB1, one end of the differential mode suppression inductor L2 is connected to the fuse FR1, the other end thereof is connected to one end of a second winding of the common mode suppression inductor TL1, the other end of the second winding is connected to a second input terminal of the rectifier bridge DB1, one end of the differential mode suppression capacitor CX2 is connected to a front end of the differential mode suppression inductor L1, one end of the differential mode suppression inductor CX1 is connected to a first input terminal of the differential mode suppression inductor L1, the other end thereof is connected to a second input terminal of the differential mode suppression inductor L2, the differential mode suppression inductor L2 is connected to a second input terminal of the differential mode suppression inductor c, the differential mode suppression inductor c2 is connected to a filter resistor c2, and the differential mode suppression capacitor c2 is connected to two ends of the filter resistor c 4, and the filter resistor c 4 is connected to the filter resistor c2, and the filter resistor b is connected to the two ends of the filter resistor c 4, and the filter resistor is connected to the load and the load 3, and the filter resistor is connected to the load and the load.
Referring to fig. 4, the active PFC circuit 2 includes a PFC control chip U2 and a boost chopper circuit, and is configured to provide a first working voltage DC-400V, where the PFC control chip U2 is of a type L6562A, the boost chopper circuit includes a transformer TR1, a MOS transistor Q1, a flywheel diode D2 and D12, load resistors R3, R8, R14, R16 and R22 connected in series, and a filter capacitor CE1, a primary coil of the transformer TR1 is used as an energy storage inductor, one end of the primary coil is connected to the load resistor R4, the other end of the primary coil is connected to the anodes of the flywheel diodes D2 and D12, a secondary coil of the transformer TR1 is connected to the PFC control chip U2, and is configured to provide a working power supply for the PFC control chip U2, an output end of the PFC control chip U2 is connected to a gate of the MOS transistor Q2, a drain of the MOS transistor Q2 is connected to the anodes of the flywheel diode D2 and D12, a source of the flywheel diode R2 is connected to the DC 12, and a drain of the flywheel diode Q2 is connected to the other end of the flywheel diode D12, and the load resistor R16 is connected to the DC 2 is connected to the DC-DC capacitor 2, and the filter capacitor is connected to the DC capacitor 2.
Referring to fig. 4, the output end of the active PFC circuit 2 is connected with a diode D3, a first voltage dividing resistor 23 and a second voltage dividing resistor 24, the output end of the active PFC circuit 2 provides a second working voltage VCC1 through the first voltage dividing resistor 23, and provides a third working voltage VCC2 through the second voltage dividing resistor 24, the first voltage dividing resistor 23 includes resistors R12, R17, R20 and R27 connected in series, the second voltage dividing resistor 24 includes resistors R13, R18, R21 and R28 connected in series, the resistor R12 and the resistor R13 are respectively connected to the cathode of the diode D3, the resistor R27 is grounded through an RC parallel filter circuit composed of a resistor R29 and a capacitor CE3, and the resistor R28 is grounded through an RC parallel filter circuit composed of a resistor R24 and a capacitor CE 6.
Referring to fig. 5, the voltage stabilizing power supply circuit 4 includes a voltage reducing chip U1 with a model AP8005SSC-R1, a high voltage pin of the voltage reducing chip U1 is connected with an output end DC-400V of the active PFC circuit 2, the high voltage pin of the voltage reducing chip U1 is further grounded through a filter capacitor CE4, an output pin of the voltage reducing chip U1 is connected with one end of a load resistor R31 through an inductor L4 and is used for outputting a fourth operating voltage 5V1, the other end of the load resistor R31 is grounded, a power pin of the voltage reducing chip U1 is connected with an output pin thereof through a start capacitor C5, a connection node between the voltage reducing chip U1 and the inductor L4 is connected with a freewheeling diode D7, an anode of the freewheeling diode D7 is grounded, and two ends of the load resistor R31 are connected with an energy storage capacitor CE5 in parallel. The working principle of the voltage-stabilizing power supply circuit 4 is as follows: after the phase line input end L and the zero line input end N are conducted in an alternating current mode, alternating current voltage flows to a high-voltage pin of the buck chip U1 after passing through the EMI filtering rectifying circuit 1 and the active PFC circuit 2, in a starting stage of the buck chip U1, a high-voltage starting tube in the chip supplies 2.5mA current to charge the starting capacitor C5, when the charging voltage reaches a starting voltage, the chip starts to work, and the high-voltage starting tube stops charging the starting capacitor C5; when the charging voltage is reduced to the closing voltage, the chip continues to work, but the high-voltage starting tube supplies 2.5mA current again to charge the external starting capacitor C5; therefore, the self-power supply of the chip is realized, and auxiliary windings or other peripheral elements are not needed for supplying power to the chip. The non-isolated constant voltage 5V output is formed by the voltage reduction chip U1 and the inductor L4, so that stable power supply can be maintained under the condition of voltage change, quick start is realized, the standby power consumption is ultralow, and the self-powered function is realized.
Referring to fig. 6, the dimming signal detection circuit 5 includes a micro-processing unit U4, a first input pin of the micro-processing unit U4 is connected to the dimming switch through a first voltage division filter circuit 51, a second input pin of the micro-processing unit U4 is connected to the infrared receiving head, the first voltage division filter circuit 51 includes resistors R19 and R23 connected in series and an RC filter circuit composed of a resistor R34 and a capacitor C11, one end of the resistor R34 is connected to one end of the resistor R23, a power pin of the micro-processing unit U4 is connected to an output end 5V1 of the voltage stabilizing power supply circuit 4, a first output pin of the micro-processing unit U4 is connected to a first RC parallel filter circuit through a resistor R48 and is used for outputting a first PWM dimming signal, a second output pin of the micro-processing unit U4 is connected to the second RC parallel filter circuit through a resistor R51 and is used for outputting a second PWM signal, the first RC parallel filter circuit includes a resistor R53 and a capacitor C17 connected in parallel, and the second RC filter circuit includes a resistor R54 and a capacitor C20. The working principle of the dimming signal detection circuit 5 is described in detail below by taking the first output pin of the micro-processing unit U4 as an example, and the working principle of the second output pin is equal to that of the first output pin: alternating current input current flows to the micro-processing unit U4 through the first voltage division filter circuit 51, the micro-processing unit U4 detects input pin voltage, the first output pin outputs PWM current with the duty ratio being the maximum value, maximum power output of the PWM1 group is achieved, when power is turned on for the second time, the energy storage capacitor CE5 continuously supplies power to the micro-processing unit U4, the second time of switching is defaulted, the first output pin of the micro-processing unit U4 outputs PWM current with the duty ratio being 50%, half power output is achieved, when power is turned on for the third time, the energy storage capacitor CE5 supplies power to the micro-processing unit U4 again, the third time of switching defaults, the first output pin of the micro-processing unit U4 outputs PWM current with the duty ratio being 10%, 10% power output is achieved, and the switching dimming function can be achieved. And if the electrolytic voltage of the energy storage capacitor CE5 is completely discharged, the state is restored to the first power-on state again, and the 100% duty ratio is output to realize full power output.
The third output pin of the micro-processing unit U4 is connected with the base electrode of the triode Q3 through a resistor R43, the collector electrode of the triode Q3 is connected with a buzzer F1, and the buzzer F1 is connected with the output end 5V1 of the voltage-stabilizing power supply circuit 4 through a resistor R39.
Referring to fig. 7, the dimming control circuit 3 includes a first dimming circuit 32 and a second dimming circuit 33 with the same structure, the first dimming circuit 32 includes an LED dimming chip U3 and a MOS transistor Q2, the type of the LED dimming chip U3 is MT7815C, an enable pin of the dimming chip U3 is connected to the resistor R48, and is configured to receive the first PWM dimming signal to implement strobeless dimming, a power pin of the dimming chip U3 is connected to the resistor R40, the resistor R40 is connected to the gate of the MOS transistor Q2, the resistor R40 is further grounded through a pull-down resistor R41, a control pin of the dimming chip U3 is connected to the source of the MOS transistor Q2, and a drain of the MOS transistor Q2 is connected to the active PFC circuit 2 through a second shunt filter circuit and is further connected to the LED PFC lamp through a common mode inductor TL 3. The first dimming circuit 32 and the second dimming circuit 33 are respectively used for controlling two different LED lamps.
The embodiment also discloses a dimming controller, which comprises a shell and an infrared remote controller, wherein a dimming switch is arranged on the shell, and the dimming driving circuit is arranged in the shell.
The embodiment also discloses an LED lamp, which comprises the dimming driving circuit and an LED lamp connected with the dimming driving circuit.
The present invention is not limited to the above embodiments, but is merely preferred embodiments of the present invention, and the present invention should be construed as being limited to the above embodiments as long as the technical effects of the present invention are achieved by the same means. Various modifications and variations are possible in the technical solution and/or in the embodiments within the scope of the invention.
Claims (5)
1. The utility model provides a drive circuit adjusts luminance, includes EMI filtering rectifier circuit (1), active PFC circuit (2) and dimming control circuit (3) that connect gradually, its characterized in that: the power supply circuit also comprises a voltage-stabilizing power supply circuit (4) and a dimming signal detection circuit (5), wherein the input end of the voltage-stabilizing power supply circuit (4) is connected with the active PFC circuit (2), the output end of the voltage-stabilizing power supply circuit is connected with the power end of the dimming signal detection circuit (5), the input end of the dimming signal detection circuit (5) is respectively connected with a dimming switch and an infrared receiving head, and the output end of the dimming signal detection circuit is connected with the dimming control circuit (3);
the active PFC circuit (2) is used for providing a first working voltage DC-400V and comprises a PFC control chip U2 and a boost chopper circuit, the boost chopper circuit comprises a transformer TR1, a MOS tube Q1, a freewheeling diode (21), a load resistor (22) and a filter capacitor CE1, one end of a primary coil of the transformer TR1 is connected with the EMI filter rectifying circuit (1), the other end of the primary coil of the transformer TR is connected with the positive electrode of the freewheeling diode (21), a secondary coil of the transformer TR1 is connected with the PFC control chip U2 and is used for providing a working power supply for the PFC control chip U2, the output end of the PFC control chip U2 is connected with the grid electrode of the MOS tube Q2 and is used for controlling the waveform of the grid voltage, the drain electrode of the MOS tube Q2 is connected with the positive electrode of the freewheeling diode (21), the source electrode of the MOS tube Q2 is grounded, and one end of the load resistor (22) and the filter capacitor CE1 are connected with the negative electrode of the freewheeling diode (21) after being connected in parallel;
the output end of the active PFC circuit (2) is connected with a diode D3, a first voltage dividing resistor (23) and a second voltage dividing resistor (24), and a second working voltage VCC1 and a third working voltage VCC2 are provided through the first voltage dividing resistor (23) and the second voltage dividing resistor (24) respectively;
the voltage-stabilizing power supply circuit (4) comprises a voltage-reducing chip U1, a high-voltage pin of the voltage-reducing chip U1 is connected with the output end of the active PFC circuit (2), the high-voltage pin of the voltage-reducing chip U1 is grounded through a filter capacitor CE4, the output pin of the voltage-reducing chip U1 is connected with one end of a load resistor R31 through an inductor L4 and is used for outputting a fourth working voltage 5V1, the other end of the load resistor R31 is grounded, a power pin of the voltage-reducing chip U1 is connected with the output pin of the voltage-reducing chip U1 through a starting capacitor C5, a connection node between the voltage-reducing chip U1 and the inductor L4 is connected with a freewheeling diode D7, the positive electrode of the freewheeling diode D7 is grounded, and two ends of the load resistor R31 are connected with an energy storage capacitor CE5 in parallel;
the dimming signal detection circuit (5) comprises a micro-processing unit U4, a first input pin of the micro-processing unit U4 is connected with the dimming switch through a first voltage division filter circuit (51), a second input pin of the micro-processing unit U4 is connected with the infrared receiving head, a power pin of the micro-processing unit U4 is connected with an output end of the voltage stabilizing power supply circuit (4), a first output pin of the micro-processing unit U4 is connected with a first RC parallel filter circuit through a resistor R48 and is used for outputting a first PWM dimming signal, and a second output pin of the micro-processing unit U4 is connected with a second RC parallel filter circuit through a resistor R51 and is used for outputting a second PWM dimming signal.
2. The dimming driving circuit as claimed in claim 1, wherein: the third output pin of the micro-processing unit U4 is connected with the base electrode of the triode Q3 through a resistor R43, and the collector electrode of the triode Q3 is connected with a buzzer F1.
3. The dimming driving circuit as claimed in claim 1, wherein: the dimming control circuit (3) comprises a first dimming circuit (32) and a second dimming circuit (33) which are identical in structure, the first dimming circuit (32) comprises an LED dimming chip U3 and an MOS tube Q2, an enabling pin of the dimming chip U3 is connected with a resistor R48 and used for receiving a first PWM dimming signal, a power pin of the dimming chip U3 is connected with a resistor R40, the resistor R40 is connected to a grid electrode of the MOS tube Q2, the resistor R40 is grounded through a pull-down resistor R41, a control pin of the dimming chip U3 is connected with a source electrode of the MOS tube Q2, and a drain electrode of the MOS tube Q2 is connected with the active circuit (2) through a second split voltage filter circuit (31) and is connected with an LED lamp through a common mode inductor TL 3.
4. A dimming controller, characterized by: comprising a housing and an infrared remote control, wherein a dimmer switch is arranged on the housing, and a dimmer driving circuit as claimed in any one of claims 1-3 is arranged in the housing.
5. An LED luminaire, characterized in that: a LED lamp comprising the dimming driving circuit according to any one of claims 1-3 and connected thereto.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811167036.3A CN109348570B (en) | 2018-10-08 | 2018-10-08 | Dimming driving circuit, dimming controller and LED lamp |
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| CN201811167036.3A CN109348570B (en) | 2018-10-08 | 2018-10-08 | Dimming driving circuit, dimming controller and LED lamp |
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| CN109348570A CN109348570A (en) | 2019-02-15 |
| CN109348570B true CN109348570B (en) | 2024-02-09 |
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| KR20160023141A (en) * | 2014-08-21 | 2016-03-03 | 한국광기술원 | Apparatus for controlling power of led |
| CN204119627U (en) * | 2014-11-04 | 2015-01-21 | 厦门华联电子有限公司 | A kind of dimming control system |
| CN104883781A (en) * | 2015-05-21 | 2015-09-02 | 华南理工大学 | Centralized power supply type LED intelligent illumination system and control method thereof |
| CN209731631U (en) * | 2018-10-08 | 2019-12-03 | 珠海市拓鑫光电科技有限公司 | A kind of dimming driving circuit, light adjusting controller and LED lamp |
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| CN109348570A (en) | 2019-02-15 |
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