CN111988880A - Constant-power ballast circuit with dimming function and control method - Google Patents
Constant-power ballast circuit with dimming function and control method Download PDFInfo
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- CN111988880A CN111988880A CN202010830564.3A CN202010830564A CN111988880A CN 111988880 A CN111988880 A CN 111988880A CN 202010830564 A CN202010830564 A CN 202010830564A CN 111988880 A CN111988880 A CN 111988880A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices
- H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices by means of a bridge converter in the final stage
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
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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
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
-
- 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
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- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
The invention discloses a constant-power ballast circuit with dimming function and a control method thereof, relates to the technical field of energy-saving and environment-friendly electronics, and comprises an EMC device, a booster circuit, a boost control circuit, an AC-to-DC 15V power module, a DC 15-to-DC 5V power module, a half-bridge circuit, a half-bridge control circuit, a half-bridge drive amplification circuit, an MCU and a dimming module. The current of a half-bridge circuit, the tube flow and the resonant voltage of the lamp tube are collected, the signal is input to the MCU, and the resonant voltage and the power of the lamp tube are calculated by the MCU, so that the starting voltage of the lamp tube is controlled, and the power of the lamp tube is adjusted; and after the dimming signal is calculated by the MCU, the signal is transmitted to the half-bridge control circuit to adjust the power of the lamp tube, so that the product cost is reduced under the conditions of uniform illumination of the lamp tube and dimming comfort.
Description
Technical Field
The invention relates to a constant-power ballast circuit with dimming function and a control method thereof, belonging to the technical field of energy-saving and environment-friendly electronics.
Background
The existing electrodeless lamp ballast comprises an electrodeless lamp ballast with a dimming function, has large output power deviation, and can cause uneven illumination when being used in large-area places such as a factory building and the like, thereby giving uncomfortable visual feeling to people; meanwhile, the dimming ballast in the market is basically designed by a 2-segment mixed frequency, so that the stroboscopic phenomenon exists, and the visual sense is very uncomfortable; the second mixing, with a frequency of 1KHz, produces a sound that is perceived as unpleasant. In order to solve the above problems, a chinese patent No. ZL201510995640.5 provides a solution, and the described 3-segment solution solves the problems of stroboflash and noise, but causes the cost to rise, the selling price to increase, and the user cost to increase.
Therefore, the application provides a 2-section constant-power ballast scheme with a dimming function on the basis of the existing scheme, and the product cost is reduced under the conditions of uniform illumination and dimming comfort.
The present application was made based on this.
Disclosure of Invention
In order to solve the above defects in the prior art, the invention provides a constant power ballast circuit with dimming function and a control method thereof, wherein an MCU is used for controlling a half-bridge working frequency to realize the constant power output of the ballast and the adjustment of the output power, so that the product cost is reduced under the conditions of uniform illumination of a lamp tube and dimming comfort.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a constant-power ballast circuit with dimming function comprises an EMC device connected with mains supply, a booster circuit connected with the output end of the EMC device, a boost control circuit connected with the input end of the booster circuit, a power conversion module I connected with the output end of the EMC device, a power conversion module II connected with the output end of the power conversion module I, a half-bridge circuit connected with the output end of the booster circuit, a half-bridge driving amplification circuit connected with the half-bridge circuit, a half-bridge control circuit connected with the input end of the half-bridge driving amplification circuit, an MCU connected with the input end of the half-bridge control circuit and a dimming module connected with the input end of the MCU; the power supply conversion module provides power supply for the boost control circuit, the half-bridge drive amplification circuit and the half-bridge control circuit; the power supply conversion module II is used for providing power supply for the MCU;
MCU includes power detection end, voltage detection end, current detection end, the input of adjusting luminance, power control output and enable control output, connects half-bridge circuit's power detection signal output part, half-bridge circuit's voltage detection signal output part, half-bridge circuit's current detection signal output part, the output of the module of adjusting luminance, two control input of half-bridge control circuit respectively. The BOOST circuit and the BOOST control circuit adopt conventional BOOST voltage; the first power supply conversion module adopts an AD-to-DC 15V power supply module; and the second power supply conversion module adopts a 15V to 5V power supply module.
Furthermore, the half-bridge driving control circuit adopts a fluorescent lamp chip with a preheating ignition function.
Further, the half-bridge circuit adopts an asymmetric half-bridge circuit, and comprises a MOS transistor Q1, a MOS transistor Q2, a half-bridge DC blocking capacitor C1, a choke coil L1, resonant capacitors C2 and C3, a resonant voltage sampling capacitor C4, C5 and C6, a rectifier diode, a divider resistor, a sampling resistor R1 and a current transformer; the source electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2, the half-bridge blocking capacitor C1 is connected with the source electrode of the MOS tube Q1, the half-bridge blocking capacitor C1 and the choke coil L1 are connected with the lamp tube in series, the resonant capacitors C2 and C3 are connected with the lamp tube in parallel after being connected with the lamp tube in series, and the resonant voltage sampling capacitors C4, C5 and C6 are connected with the lamp tube in parallel after being connected with the lamp tube in series.
Furthermore, the current transformer detects the current of the lamp tube, and outputs a current detection signal to the MCU;
the boost circuit outputs DC-BUS constant voltage, R1 is MOS tube current sampling and is transmitted to a half-bridge control circuit to control the switching of the MOS tube, and the sampled MOS tube current is transmitted to the MCU as a power detection signal of the lamp tube;
the capacitors C4, C5 and C6 are resonance voltage sampling capacitors, and output voltage detection signals are transmitted to the MCU after the capacitors are rectified by the diodes and divided by the resistors.
A control method of a constant-power ballast circuit with dimming comprises the following steps:
step 1, in the starting process, judging with an internal reference after receiving a voltage signal by an MCU; if the voltage reaches the internal reference, performing step 2; if the voltage signal does not reach the internal reference voltage, executing the step 4;
step 2, switching off the output of the MOS transistor by enabling the control output; meanwhile, detecting a current signal, judging whether the lamp tube works normally, and if the lamp tube works, executing the step 3; if the lamp tube does not work, executing the step 3;
step 3, enabling the control output to enable the half-bridge control circuit to preheat and ignite again so as to keep the lamp tube working normally;
step 4, after the lamp tube works normally, the MCU receives the power detection signal and judges whether the power of the lamp tube reaches the preset power; if the power signal is lower than or higher than a preset value, the working frequency of a half-bridge control circuit is adjusted through power control output, the output power of the lamp tube is adjusted, and constant power output is realized;
and 5, receiving the dimming input signal by the MCU, and changing a preset value for power detection comparison, thereby changing power control output, adjusting the output power of the lamp tube and realizing the dimming function of the lamp tube.
The invention has the beneficial technical effects that:
the current of a half-bridge circuit, the tube flow and the resonant voltage of the lamp tube are collected, the signal is input to the MCU, and the resonant voltage and the power of the lamp tube are calculated by the MCU, so that the starting voltage of the lamp tube is controlled, and the power of the lamp tube is adjusted; and after the dimming signal is calculated by the MCU, the signal is transmitted to the half-bridge control circuit to adjust the power of the lamp tube, so that the product cost is reduced under the conditions of uniform illumination of the lamp tube and dimming comfort.
Drawings
Fig. 1 is a schematic circuit diagram of a constant power ballast circuit with dimming according to the present embodiment.
Detailed Description
In order to make the technical means and technical effects achieved by the technical means of the present invention more clearly and more perfectly disclosed, the following embodiments are provided, and the following detailed description is made with reference to the accompanying drawings:
as shown in fig. 1, the constant power ballast circuit with dimming of the present embodiment includes: EMC device, boost circuit, boost control circuit, AC changes DC15V power module, and DC15V changes DC5V power module, half-bridge circuit, half-bridge control circuit, half-bridge drive amplifier circuit, MCU, the module of adjusting luminance constitutes. The system comprises an EMC device, a BOOST circuit and a BOOST control circuit, wherein the BOOST control circuit is conventional BOOST voltage, and BOOSTs alternating current into high-voltage direct current after rectifying the alternating current; the AC-to-DC 15V power supply module is a conventional flyback or BUCK voltage reduction circuit and provides power supply for the control circuit; the DC 15V-DC 5V power supply module is a conventional BUCK voltage reduction circuit and provides power supply for the MCU; the half bridge is a conventional circuit, and the embodiment adopts an asymmetric half bridge circuit; the half-bridge driving control circuit generally adopts a fluorescent lamp chip with a preheating ignition function (such as IR2153\ L6574 and the like) because the starting of the electrodeless lamp tube needs high energy; the half-bridge driving amplification circuit provides enough energy for driving the MOS tube; the dimming module converts the dimming signal into a PWM waveform, transmits the PWM waveform to the MCU for internal calculation and control, and the signal is defined as a dimming input signal. R1 samples MOS tube current, transmits to the half-bridge control circuit, carries on the control of MOS tube switch, because the voltage of DC-BUS is the invariable value, this current signal can also be regarded as the power detection signal of the modulator tube at the same time, and transmit MCU after amplifying this signal, this signal is defined as the power detection signal. C1 is a half-bridge DC blocking capacitor; l1 is a choke coil, which participates in the resonance process when the lamp tube is started; C2/C3 is resonance capacitance; C4/C5/C6 is resonance voltage sampling, and is transmitted to the MCU after being rectified by a diode and divided by a resistor, and the signal is defined as a voltage detection signal; the current transformer detects the current of the lamp tube, and transmits the current to the MCU after the current is rectified by the diode and divided by the resistor, and the signal is defined as a current detection signal.
The following describes the analysis and judgment of the MCU after receiving the above signals.
Step 1, in the starting process, judging with an internal reference after receiving a voltage signal by an MCU; if the voltage reaches the internal reference, the resonance voltage is considered to reach the set value, the frequency sweeping cannot be continued, the situation that the resonance voltage is too high and the ballast is damaged is prevented, and the step 2 is carried out; if the voltage signal does not reach the internal reference voltage, the MCU considers that the current state is safe, and executes the step 4;
step 2, switching off the output of the MOS transistor by enabling the control output; when the MCU turns off the MOS tube signal, detecting a current signal at the same time, judging whether the lamp tube works normally, and if the lamp tube works, executing the step 3; if the lamp tube does not work, executing the step 3;
step 3, the half-bridge control circuit is preheated and ignited again through enabling control output so as to keep the lamp tube working normally, and the times of the process can be preset through the MCU;
step 4, after the lamp tube works normally, the MCU receives the power detection signal and judges whether the power of the lamp tube reaches the preset power; if the power signal is lower than or higher than a preset value, the working frequency of a half-bridge control circuit is adjusted through power control output, the output power of the lamp tube is adjusted, and constant power output is realized;
and 5, receiving the dimming input signal by the MCU, and changing a preset value for power detection comparison, thereby changing power control output, adjusting the output power of the lamp tube and realizing the dimming function of the lamp tube.
The principle and the beneficial effects of the embodiment are as follows:
1. the frequency of the half-bridge control circuit is adjusted in a small range through the MCU, so that the output power is constant.
2. The frequency of the half-bridge control circuit is adjusted in a large range through the MCU, so that the dimming function of the lamp tube is realized.
3. And when the lamp tube is started, the preheating ignition control time sequence of the MCU is carried out.
4. The output of the lamp tube is adjusted by adjusting the working frequency of the half-bridge circuit.
5. The 2-section constant-power ballast circuit with the dimming function and the control method are adopted, so that the product cost is reduced under the conditions of uniform illumination of the lamp tube and dimming comfort.
The above description is provided for the purpose of further elaboration of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that various simple deductions or substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and all such alternatives are included in the scope of the present invention.
Claims (5)
1. A constant power ballast circuit with dimming function is characterized in that: the power supply comprises an EMC device connected with mains supply, a booster circuit connected with the output end of the EMC device, a booster control circuit connected with the input end of the booster circuit, a power conversion module I connected with the output end of the EMC device, a power conversion module II connected with the output end of the power conversion module I, a half-bridge circuit connected with the output end of the booster circuit, a half-bridge driving amplification circuit connected with the half-bridge circuit, a half-bridge control circuit connected with the input end of the half-bridge driving amplification circuit, an MCU connected with the input end of the half-bridge control circuit and a dimming module connected with the input end of the MCU; the power supply conversion module provides power supply for the boost control circuit, the half-bridge drive amplification circuit and the half-bridge control circuit; the power supply conversion module II is used for providing power supply for the MCU;
the MCU comprises a power detection end, a voltage detection end, a current detection end, a dimming input end, a power control output end and an enable control output end, and is respectively connected with the power detection signal output end of the half-bridge circuit, the voltage detection signal output end of the half-bridge circuit, the current detection signal output end of the half-bridge circuit, the output end of the dimming module and the two control input ends of the half-bridge control circuit; the BOOST circuit and the BOOST control circuit adopt conventional BOOST voltage; the first power supply conversion module adopts an AD-to-DC 15V power supply module; and the second power supply conversion module adopts a 15V to 5V power supply module.
2. The constant power ballast circuit with dimming of claim 1, wherein: the half-bridge drive control circuit adopts a fluorescent lamp chip with a preheating ignition function.
3. The constant power ballast circuit with dimming of claim 1, wherein: the half-bridge circuit adopts an asymmetric half-bridge circuit and comprises an MOS tube Q1, an MOS tube Q2, a half-bridge blocking capacitor C1, a choke coil L1, resonant capacitors C2 and C3, resonant voltage sampling capacitors C4, C5 and C6, a rectifier diode, a divider resistor, a sampling resistor R1 and a current transformer; the source electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2, the half-bridge blocking capacitor C1 is connected with the source electrode of the MOS tube Q1, the half-bridge blocking capacitor C1 and the choke coil L1 are connected with the lamp tube in series, the resonant capacitors C2 and C3 are connected with the lamp tube in parallel after being connected with the lamp tube in series, and the resonant voltage sampling capacitors C4, C5 and C6 are connected with the lamp tube in parallel after being connected with the lamp tube in series.
4. A constant power ballast circuit with dimming as claimed in claim 3 wherein: the current transformer detects the current of the lamp tube, and outputs a current detection signal to the MCU;
the boost circuit outputs DC-BUS constant voltage, R1 is MOS tube current sampling and is transmitted to a half-bridge control circuit to control the switching of the MOS tube, and the sampled MOS tube current is transmitted to the MCU as a power detection signal of the lamp tube;
the capacitors C4, C5 and C6 are resonance voltage sampling capacitors, and output voltage detection signals are transmitted to the MCU after the capacitors are rectified by the diodes and divided by the resistors.
5. A control method of a constant-power ballast circuit with dimming comprises the following steps:
step 1, in the starting process, judging with an internal reference after receiving a voltage signal by an MCU; if the voltage reaches the internal reference, performing step 2; if the voltage signal does not reach the internal reference voltage, executing the step 4;
step 2, switching off the output of the MOS transistor by enabling the control output; meanwhile, detecting a current signal, judging whether the lamp tube works normally, and if the lamp tube works, executing the step 3; if the lamp tube does not work, executing the step 3;
step 3, enabling the control output to enable the half-bridge control circuit to preheat and ignite again so as to keep the lamp tube working normally;
step 4, after the lamp tube works normally, the MCU receives the power detection signal and judges whether the power of the lamp tube reaches the preset power; if the power signal is lower than or higher than a preset value, the working frequency of a half-bridge control circuit is adjusted through power control output, the output power of the lamp tube is adjusted, and constant power output is realized;
and 5, receiving the dimming input signal by the MCU, and changing a preset value for power detection comparison, thereby changing power control output, adjusting the output power of the lamp tube and realizing the dimming function of the lamp tube.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830564.3A CN111988880A (en) | 2020-08-18 | 2020-08-18 | Constant-power ballast circuit with dimming function and control method |
| PCT/CN2020/124185 WO2022036856A1 (en) | 2020-08-18 | 2020-10-28 | Constant-power ballast circuit with dimming function and control method |
| DE112020003850.5T DE112020003850T5 (en) | 2020-08-18 | 2020-10-28 | A constant power ballast circuit with dimming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830564.3A CN111988880A (en) | 2020-08-18 | 2020-08-18 | Constant-power ballast circuit with dimming function and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111988880A true CN111988880A (en) | 2020-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010830564.3A Pending CN111988880A (en) | 2020-08-18 | 2020-08-18 | Constant-power ballast circuit with dimming function and control method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN111988880A (en) |
| DE (1) | DE112020003850T5 (en) |
| WO (1) | WO2022036856A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085532B (en) * | 2022-07-18 | 2023-06-23 | 深圳莱福德科技股份有限公司 | High-power factor direct-current fan lamp driver of low-voltage motor |
| CN116347691A (en) * | 2022-12-30 | 2023-06-27 | 珠海雷特科技股份有限公司 | An intelligent dimming circuit, an intelligent dimming power supply, and an intelligent lamp |
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2020
- 2020-08-18 CN CN202010830564.3A patent/CN111988880A/en active Pending
- 2020-10-28 WO PCT/CN2020/124185 patent/WO2022036856A1/en not_active Ceased
- 2020-10-28 DE DE112020003850.5T patent/DE112020003850T5/en not_active Withdrawn
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| US6008592A (en) * | 1998-06-10 | 1999-12-28 | International Rectifier Corporation | End of lamp life or false lamp detection circuit for an electronic ballast |
| US20020153849A1 (en) * | 2001-03-22 | 2002-10-24 | International Rectifier Corporation | Electronic dimmable ballast for high intensity discharge lamp |
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| CN105611669A (en) * | 2015-12-25 | 2016-05-25 | 浙江宇光照明科技有限公司 | Non-flicker and soundless driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
| CN115734428B (en) * | 2022-12-28 | 2024-05-31 | 威海中远海运重工科技有限公司 | Constant-power electrodeless dimming control system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112020003850T5 (en) | 2022-04-28 |
| WO2022036856A1 (en) | 2022-02-24 |
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Application publication date: 20201124 |