CN103533717A - Electronic equipment based on direct current supply communication and control method thereof - Google Patents
Electronic equipment based on direct current supply communication and control method thereof Download PDFInfo
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Abstract
The invention discloses electronic equipment based on direct current supply communication and a control method of the electronic equipment. The electronic equipment comprises a power supply and a controlled device, wherein the power supply comprises a power supply conversion module, an on-off switch and a modulation module; the controlled device comprises a demodulation control module, a driving module and a load; the power supply conversion module and the modulation module are connected with the on-off switch; the demodulation control module and the load are connected with the driving module; the on-off switch is also connected with the driving module through a power line; the demodulation control module is connected with the power line; and the modulation module controls the on-off time of the on-off switch according to external remote control commands, so that the remote control commands are modulated into corresponding control signals according to the on-off time, the control signals are sent through the power line and then demodulated by the demodulation control module according to the on-off time, and adjustment of the working state of the load by the driving module is controlled. The electronic equipment is simple in structure, and the working state of the load can be adjusted accurately.
Description
Technical field
The present invention relates to adopt the electronic equipment control field of DC power supply, relate in particular to a kind of electronic equipment and control method thereof based on direct current supply communication.
Background technology
Along with the development of lighting technology, LED(Light Emitting Diode, light-emitting diode) illuminating product be owing to can carrying out easily the adjusting of brightness or colour temperature, progressively substitutes traditional Halogen lamp LED and CFL lighting product.
At present, take MR16 shot-light as main representative in LED illuminating product, the formation of this type of illuminating product is generally comprised of power transformer and shot-light.Power transformer is converted to 220V civil power the high-frequency ac power of 12V, by the 12V high-frequency ac power being converted to, drives MR16 shot-light luminous.For the MR16 shot-light that has light modulation demand, in prior art, be to control by traditional controllable silicon light modulation mode, the power supply of system and dimming mode have still been continued to use traditional electronic transformer and controllable silicon light modulation mode, this silicon controlled dimming mode has been equivalent to adjust the voltage to the power supply of MR16 shot-light, by corresponding circuit, by the drive current of LED, input voltage is corresponding therewith again in shot-light inside, thereby realizes brightness adjustment control.Like this, the circuit of MR16 shot-light inside is very complicated, causes cost higher and be difficult to realize miniaturization, in addition, by adjusting the supply power voltage of MR16 shot-light, it is controlled to the operating state that cannot adjust accurately MR16 shot-light, and cannot carry out more complicated control.
Summary of the invention
Main purpose of the present invention is to provide a kind of simple in structure and electronic equipment and the control method thereof based on direct current supply communication that can carry out accurately controlling to load.
In order to achieve the above object, the present invention proposes a kind of electronic equipment based on direct current supply communication, comprise power supply and controlled device, described power supply comprises power transfer module, on-off switch and modulation module, described controlled device comprises demodulation control module, driver module and load, wherein:
Described power transfer module is connected with described on-off switch with modulation module;
Described demodulation control module is connected with described driver module with described load;
Described on-off switch is also connected with described driver module through power line, and described demodulation control module connects described power line;
Described power transfer module is for being converted to DC power supply by civil power, and described DC power supply exports described driver module to through described on-off switch and power line, is described driver module power supply;
Described on-off switch is for controlling the break-make of described DC power supply;
Described modulation module is used for receiving outside remote control command, and modulates according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch;
Described demodulation control module is for carrying out control signal described in demodulation by detecting the make-and-break time of DC power supply described in power line, and described control signal is converted to corresponding driving signal is sent to described driver module;
Described driver module is used for according to the operating state of load described in described driving signal controlling.
Preferably, described controlled device is LED light fixture, and described load is LED.
Preferably, the positive pole of described DC power supply is connected with described driver module, the minus earth of described DC power supply, described on-off switch is field effect transistor, the grid of described field effect transistor is connected with described modulation module, the drain electrode of described field effect transistor is connected with described driver module, the source ground of described field effect transistor.
Preferably, described modulation module is first microprocessor, described first microprocessor and external remote control equipment connection, to receive outside remote control command, described first microprocessor is also connected with the grid of described field effect transistor, to modulate according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch.
Preferably, described driver module comprises polarization converting unit and LED driver element, described polarization converting unit is connected with described on-off switch and described LED driver element, for the polarity that exports the DC power supply of described driver module to is fixed, described LED driver element is connected with described LED, for controlling described LED work.
Preferably, described polarization converting unit comprises full-bridge rectification bridge and storage capacitor, the ac input end of described full-bridge rectification bridge is connected with the drain electrode anodal and described field effect transistor of described DC power supply respectively, the DC output end of described full-bridge rectification bridge is connected with described LED driver element, one end of described storage capacitor is connected between the DC output end and described LED driver element of described full-bridge rectification bridge, the other end ground connection of described storage capacitor, described storage capacitor is used for when described on-off switch turn-offs for described LED driver element provides the electric energy that is enough to make described LED normal operation.
Preferably, described demodulation control module comprises the first diode, the second diode, the first resistance, the second resistance, voltage stabilizing didoe and the second microprocessor, the anode of described the first diode, the anode of described the second diode is connected with the ac input end of described full-bridge rectification bridge respectively, the negative electrode of described the first diode is connected and is connected with described the second microprocessor by described the first resistance with the negative electrode of described the second diode, described second resistance one end is connected with the negative electrode of described the first diode, described the second resistance other end ground connection, the negative electrode of described voltage stabilizing didoe is connected with described the second microprocessor, the plus earth of described voltage stabilizing didoe, described the second microprocessor is also connected with described LED driver element.
The present invention also proposes a kind of control method of the electronic equipment based on direct current supply communication, comprising:
Modular converter is converted to DC power supply by civil power, and described DC power supply exports driver module to through on-off switch and power line, is described driver module power supply;
Modulation module receives outside remote control command, and modulates according to described remote control command the make-and-break time that corresponding control signal is controlled on-off switch;
Demodulation control module is carried out control signal described in demodulation by detecting the make-and-break time of DC power supply in power line, and described control signal is converted to corresponding driving signal is sent to driver module;
Driver module is according to the operating state of described driving signal controlling load.
Preferably, describedly according to described remote control command, modulate corresponding control signal and control the step of the make-and-break time of on-off switch and comprise:
According to described remote control command, modulate corresponding control signal and control on-off switch so that fixedly the turn-off time is carried out interval shutoff operation;
It is rear as corresponding control signal that ON time between twice shutoff is calculated conversion.
Preferably, described remote control command is controlled in the make-and-break time of on-off switch, and the ON time of on-off switch is than described large preset value of fixedly turn-off time, and described preset value is the more than 5 times of described fixedly turn-off time.
A kind of electronic equipment and control method thereof based on direct current supply communication that the present invention proposes, by modulation module, according to outside remote control command, controlled the make-and-break time of on-off switch, thereby according to described make-and-break time, described remote control command is modulated into corresponding control signal, by power line, send, by demodulation control module, according to make-and-break time, carry out control signal described in demodulation again, thereby control the adjustment of driver module to loaded work piece state, owing to only need the make-and-break time of on-off switch being controlled and can send out complicated control signal, and only need be sent to by power line driver module together with input power, structure is very simple, can adjust accurately the operating state of load, in addition, according to the different control signals that send, can carry out various control to the operating state of load, very practical.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the electronic equipment of preferred embodiment of the present invention based on direct current supply communication;
Fig. 2 is the circuit diagram of the electronic equipment of preferred embodiment of the present invention based on direct current supply communication.
In order to make technical scheme of the present invention clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the structured flowchart of the electronic equipment of preferred embodiment of the present invention based on direct current supply communication.
Preferred embodiment of the present invention proposes a kind of electronic equipment based on direct current supply communication, comprise power supply A and controlled device B, described power supply A comprises power transfer module 1, on-off switch 2 and modulation module 3, described controlled device B comprises demodulation control module 4, driver module 5 and load, it should be noted that, controlled device B in the present embodiment can be any controlled device that is only connected and is had transfer of data demand by power line and power supply A, for convenience of explanation, below the controlled device of only take is specifically described as LED light fixture as example, certainly, also not limiting controlled device is other types, the principle of other types controlled device can be with reference to the operation principle of LED light fixture, do not repeat them here.When controlled device B is LED light fixture, load is LED, wherein:
Described power transfer module 1 is connected with described on-off switch 2 with modulation module 3; Described demodulation control module 4 is connected with described driver module 5 with described LED; Described on-off switch 2 is also connected with described driver module 5 through power line, and described demodulation control module 4 connects described power line; Described power transfer module 1 is for civil power is converted to DC power supply, and described DC power supply exports described driver module 5 to through described on-off switch 2, is described driver module 5 power supplies;
Described on-off switch 2 is for controlling the break-make of described DC power supply; Described modulation module 3 is for receiving outside remote control command, and modulates according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch 2; Described demodulation control module 4 is for carrying out control signal described in demodulation by detecting the make-and-break time of DC power supply described in power line, and described control signal is converted to corresponding driving signal is sent to described driver module 5; Described driver module 5 is for according to the operating state of LED described in described driving signal controlling.
With reference to Fig. 2, Fig. 2 is the circuit diagram of the electronic equipment of preferred embodiment of the present invention based on direct current supply communication.
The positive pole 11 of described DC power supply is connected with described driver module 5, negative pole 12 ground connection of described DC power supply.Described on-off switch 2 is field effect transistor 21, and the grid G of described field effect transistor 21 is connected with described modulation module 3, and the drain D of described field effect transistor 21 is connected with described driver module 5, the source S ground connection of described field effect transistor 21.
Wherein, described modulation module 3 is first microprocessor 31, described first microprocessor 31 and external remote control equipment connection, to receive outside remote control command, described first microprocessor 31 is also connected with the grid G of described field effect transistor 21, to modulate according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch 2.
Described driver module 5 comprises polarization converting unit 51 and LED driver element 52, described polarization converting unit 51 is connected with described on-off switch 2 and described LED driver element 52, for the polarity that exports the DC power supply of described driver module 5 to is fixed, described LED driver element 52 is connected with described LED, for controlling described LED work.
Described polarization converting unit 51 comprises full-bridge rectification bridge 511 and storage capacitor C, the ac input end a of described full-bridge rectification bridge 511, b connects respectively at the positive pole 11 of described DC power supply and the drain D of described field effect transistor 21, the DC output end of described full-bridge rectification bridge 511 is connected with described LED driver element 52, one end of described storage capacitor C is connected between the DC output end and described LED driver element 52 of described full-bridge rectification bridge 511, the other end ground connection of described storage capacitor C, described storage capacitor C is used for when described on-off switch 2 turn-offs for described LED driver element 52 provides the electric energy that is enough to make described LED normal operation.
Described demodulation control module 4 comprises the first diode D1, the second diode D2, the first resistance R 1, the second resistance R 2, voltage stabilizing didoe ZD and the second microprocessor 41, the anode of described the first diode D1, the anode of described the second diode D2 is connected with the ac input end of described full-bridge rectification bridge 511 respectively, the negative electrode of described the first diode D1 is connected and is connected with described the second microprocessor 41 by described the first resistance R 1 with the negative electrode of described the second diode D2, described second resistance R 2 one end are connected with the negative electrode of described the first diode D1, described the second resistance R 2 other end ground connection, the negative electrode of described voltage stabilizing didoe ZD is connected with described the second microprocessor 41, the plus earth of described voltage stabilizing didoe 41, described the second microprocessor 41 is also connected with described LED driver element 52.
LED is the light source that a kind of monochromaticjty is good, power energy consumption is little, thermal effect is little, cheap and easy to get, extensive use in electronic applications, and the LED in the present embodiment be take conventional at present MR16 shot-light as example describes, and certainly, does not also limit the LED of other models.
The operation principle of the electronic equipment of preferred embodiment of the present invention based on direct current supply communication specifically describes as follows:
In the present embodiment, power transfer module 1 is converted to 220V civil power the DC power supply of 12V, because the positive pole 11 of described DC power supply is directly connected with the ac input end a of described full-bridge rectification bridge 511, and the ac input end b of described full-bridge rectification bridge 511 is also through on-off switch 2 ground connection, therefore, when on-off switch 2 conducting, the ac input end b ground connection of described full-bridge rectification bridge 511, DC power supply exports driver module 5 to, when on-off switch 2 turn-offs, the ac input end b of described full-bridge rectification bridge 511 is unsettled, without DC power supply, exports driver module 5 to, it should be noted that, the ac input end a of described full-bridge rectification bridge 511, in b, one end all can be connected with the positive pole 11 of described DC power supply arbitrarily, and the electric power polarity that exports LED driver element 52 to is constant, therefore, full-bridge rectification bridge 511 can play the effect of fixed polarity, no matter the input of LED light fixture B is connected with power supply A is positive and negative, can guarantee the normal operation of LED, convenient, in the present embodiment, for convenience of explanation, with the ac input end a of described full-bridge rectification bridge 511 and the positive pole 11 of described DC power supply, being connected to example describes, other situations are not construed as limiting.
When described field effect transistor 21 conducting, DC power supply exports driver module 5 to, DC power supply is storage capacitor C charging through described full-bridge rectification bridge 511, be described LED driver element 52 power supplies simultaneously, now in the first diode D1 and the second diode D2, have a meeting conducting, DC power supply is exported high level to the second microprocessor 41 through R1; When described field effect transistor 21 cut-off, without DC power supply, export driver module 5 to, it is the DC power supply disconnection in circuit, now the first diode D1 and the second diode D2 all end, the second microprocessor 41 obtains a low level, thus, the second microprocessor 41 gets final product the break-make of DC power supply in testing circuit according to the low and high level obtaining.
Further, conducting and deadline that the cycle that first microprocessor 31 is exported low and high level by control can be controlled described field effect transistor 21 are also the make-and-break time of DC power supply, in the present embodiment, first microprocessor 31 can be controlled described on-off switch 2 and within the regular hour, take the shutoff operation that the specific interval time of carrying out is t1, the control signal that ON time length between twice shutoff operation is modulated according to described remote control command as first microprocessor 31, when the ON time of described field effect transistor 21 is greater than set point, represent to be ready to transmit control signal, first microprocessor 31 starts to control conducting and the cut-off of described field effect transistor 21, be always t1 the deadline of described field effect transistor 21, owing to exporting driver module 5 without DC power supply at t1 in the time, for guaranteeing the normal operation of LED, in t1 time domestic demand, by storage capacitor C, be that LED powers, therefore, it is too low that the value of t1 must guarantee can not to fall in the operating voltage of t1 LED in the time, known through experiment test, t1 is preferably 100us, and now need to choose suitable storage capacitor C, to guarantee that LED can work in the deadline of described field effect transistor 21 t1, as when the t1=100uS, the LED lamp of a 12V/5W only needs the storage capacitor C of 22uF left and right can maintain its reliable and stable work.
At first microprocessor 31, control described field effect transistor 21 cut-off t1 after the time, control the time of described field effect transistor 21 conductings (10*t1+t2).Wherein, 10*t1 is in order to guarantee that the opening time of on-off switch 2 is not less than 10 times of turn-off time, thereby guarantee that LED lamp can obtain a less stabilized power supply of mean value fluctuation, it should be noted that, 10*t1 is the preferred value that test obtains by experiment, certainly, do not limit other values yet and can guarantee that LED lamp obtains the less stabilized power supply that fluctuates yet.The control signal that in the ON time of described field effect transistor 21 (10*t1+t2), the value of t2 is modulated according to described remote control command as first microprocessor 31, first microprocessor 31 is controlled the different ON time of described field effect transistor 21 according to different remote control commands, thereby modulate corresponding control signal according to the different ON time of described field effect transistor 21, as control the ON time (10*t1+t2) of field effect transistor 21, t2 is divided into 16 sections, with 100uS, increase progressively, from 0uS to 1500uS, t2 can represent the binary number of 4 (nibbles), if the time of on-off switch 2 maintenance conductings is 1700uS between twice turn-off time t1, known t2 is 700uS, the data that representative sends are 7, be converted to binary system and be " 0111 ".Therefore, only need carry out the control of accurate opening time, turn-off time by 31 pairs of described on-off switches 2 of first microprocessor, can in the situation that not affecting LED normal operation, send corresponding control signal.
When first microprocessor 31 sends after corresponding control signal, the second microprocessor 41 can know that according to the low and high level cycle of obtaining the make-and-break time of DC power supply in circuit is also opening time and the turn-off time of described on-off switch 2, the second microprocessor 41 can restore the control signal that first microprocessor 31 sends according to counter pushing away of the opening time of described on-off switch 2, the control signal sending according to the first microprocessor 31 of reduction can be known the adjusting operation that need carry out LED, the second microprocessor 41 is converted to by described control signal the driving signal that LED driver element 52 can be identified according to the adjusting operation that need carry out LED of knowing, and the driving signal of conversion is sent to LED driver element 52, by LED driver element 52, according to this driving signal, LED is adjusted accordingly again, as light modulation, the operations such as switch.
In other optional execution modes, when being a plurality of LED light fixture power supply, each LED light fixture all can receive by its second microprocessor the control signal that first microprocessor sends simultaneously, thereby can realize unified management, controls, very convenient, further, in the control signal that first microprocessor sends, also can comprise the address information of each LED light fixture, as the ON time that increases by one section of field effect transistor 21 writes the address information of each LED light fixture, thereby the address information that has comprised each LED light fixture in the control signal that first microprocessor is sent, each LED light fixture can carry out demodulation analysis to control signal by its second microprocessor, only to meeting the LED light fixture of address information in control signal, control adjustment, realized the function of controlling for specific LED light fixture, more convenient and practical when controlling a plurality of LED light fixture.
The present invention also proposes a kind of control method of the electronic equipment based on direct current supply communication, and modular converter is converted to DC power supply by civil power, and described DC power supply exports driver module to through on-off switch and power line, is described driver module power supply; Modulation module receives outside remote control command, and modulate according to described remote control command the make-and-break time that corresponding control signal is controlled on-off switch, particularly, modulation module is modulated corresponding control signal according to described remote control command and is controlled on-off switch and with fixing turn-off time, carry out interval and turn-off operation, and the ON time between twice shutoff is calculated after conversion as control signal accordingly.Demodulation control module is carried out control signal described in demodulation by detecting the make-and-break time of DC power supply in power line, and described control signal is converted to corresponding driving signal is sent to driver module; Driver module is according to the operating state of described driving signal controlling load.Further, for proof load can obtain a less stabilized power supply of mean value fluctuation, described remote control command is controlled in the make-and-break time of on-off switch, and the ON time of on-off switch is than large the more than 5 times of at least described fixedly turn-off time of described fixedly turn-off time.Owing to only need the make-and-break time of on-off switch being controlled and can send out complicated control signal, and only need be sent to by power line driver module together with input power, structure is very simple, can adjust accurately the operating state of load, in addition, according to the different control signals that send, can carry out various control to the operating state of load, very practical.
Above-mentioned electronic equipment and control method thereof based on direct current supply communication, by modulation module, according to outside remote control command, controlled the make-and-break time of on-off switch, thereby according to described make-and-break time, described remote control command is modulated into corresponding control signal, by power line, send, by demodulation control module, according to make-and-break time, carry out control signal described in demodulation again, thereby control the adjustment of driver module to loaded work piece state, owing to only need the make-and-break time of on-off switch being controlled and can send out complicated control signal, and only need be sent to by power line driver module together with input power, structure is very simple, can adjust accurately the operating state of load, in addition, according to the different control signals that send, can carry out various control to the operating state of load, very practical.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the electronic equipment based on direct current supply communication, comprise power supply and controlled device, it is characterized in that, described power supply comprises power transfer module, on-off switch and modulation module, described controlled device comprises demodulation control module, driver module and load, wherein:
Described power transfer module is connected with described on-off switch with modulation module;
Described demodulation control module is connected with described driver module with described load;
Described on-off switch is also connected with described driver module through power line, and described demodulation control module connects described power line;
Described power transfer module is for being converted to DC power supply by civil power, and described DC power supply exports described driver module to through described on-off switch and power line, is described driver module power supply;
Described on-off switch is for controlling the break-make of described DC power supply;
Described modulation module is used for receiving outside remote control command, and modulates according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch;
Described demodulation control module is for carrying out control signal described in demodulation by detecting the make-and-break time of DC power supply described in power line, and described control signal is converted to corresponding driving signal is sent to described driver module;
Described driver module is used for according to the operating state of load described in described driving signal controlling.
2. electronic equipment according to claim 1, is characterized in that, described controlled device is LED light fixture, and described load is LED.
3. electronic equipment according to claim 2, it is characterized in that, the positive pole of described DC power supply is connected with described driver module, the minus earth of described DC power supply, described on-off switch is field effect transistor, the grid of described field effect transistor is connected with described modulation module, and the drain electrode of described field effect transistor is connected with described driver module, the source ground of described field effect transistor.
4. electronic equipment according to claim 3, it is characterized in that, described modulation module is first microprocessor, described first microprocessor and external remote control equipment connection, to receive outside remote control command, described first microprocessor is also connected with the grid of described field effect transistor, to modulate according to described remote control command the make-and-break time that corresponding control signal is controlled described on-off switch.
5. electronic equipment according to claim 4, it is characterized in that, described driver module comprises polarization converting unit and LED driver element, described polarization converting unit is connected with described on-off switch and described LED driver element, for the polarity that exports the DC power supply of described driver module to is fixed, described LED driver element is connected with described LED, for controlling described LED work.
6. electronic equipment according to claim 5, it is characterized in that, described polarization converting unit comprises full-bridge rectification bridge and storage capacitor, the ac input end of described full-bridge rectification bridge is connected with the drain electrode anodal and described field effect transistor of described DC power supply respectively, the DC output end of described full-bridge rectification bridge is connected with described LED driver element, one end of described storage capacitor is connected between the DC output end and described LED driver element of described full-bridge rectification bridge, the other end ground connection of described storage capacitor, described storage capacitor is used for when described on-off switch turn-offs for described LED driver element provides the electric energy that is enough to make described LED normal operation.
7. electronic equipment according to claim 6, it is characterized in that, described demodulation control module comprises the first diode, the second diode, the first resistance, the second resistance, voltage stabilizing didoe and the second microprocessor, the anode of described the first diode, the anode of described the second diode is connected with the ac input end of described full-bridge rectification bridge respectively, the negative electrode of described the first diode is connected and is connected with described the second microprocessor by described the first resistance with the negative electrode of described the second diode, described second resistance one end is connected with the negative electrode of described the first diode, described the second resistance other end ground connection, the negative electrode of described voltage stabilizing didoe is connected with described the second microprocessor, the plus earth of described voltage stabilizing didoe, described the second microprocessor is also connected with described LED driver element.
8. a control method for the electronic equipment based on direct current supply communication, is characterized in that, comprising:
Modular converter is converted to DC power supply by civil power, and described DC power supply exports driver module to through on-off switch and power line, is described driver module power supply;
Modulation module receives outside remote control command, and modulates according to described remote control command the make-and-break time that corresponding control signal is controlled on-off switch;
Demodulation control module is carried out control signal described in demodulation by detecting the make-and-break time of DC power supply in power line, and described control signal is converted to corresponding driving signal is sent to driver module;
Driver module is according to the operating state of described driving signal controlling load.
9. method according to claim 8, is characterized in that, describedly according to described remote control command, modulates corresponding control signal and controls the step of the make-and-break time of on-off switch and comprise:
According to described remote control command, modulate corresponding control signal and control on-off switch so that fixedly the turn-off time is carried out interval shutoff operation;
It is rear as corresponding control signal that ON time between twice shutoff is calculated conversion.
10. method according to claim 9, is characterized in that, described remote control command is controlled in the make-and-break time of on-off switch, and the ON time of on-off switch is than described large preset value of fixedly turn-off time, and described preset value is the more than 5 times of described fixedly turn-off time.
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| CN110198584A (en) * | 2019-06-24 | 2019-09-03 | 山东中大电源科技有限公司 | A kind of one-way power carrier wave LED light adjusting system |
| CN110198584B (en) * | 2019-06-24 | 2024-08-06 | 山东中大电源科技有限公司 | Unidirectional power carrier LED dimming system |
| WO2021047601A1 (en) * | 2019-09-10 | 2021-03-18 | 嘉兴山蒲照明电器有限公司 | Light-emitting diode lamp illumination system, dimmer and illumination apparatus thereof, and dimming control method therefor |
| CN116800240A (en) * | 2022-04-27 | 2023-09-22 | 深圳市芯宇昊科技有限公司 | Power line carrier driving circuit and driving method thereof |
| CN117881041A (en) * | 2024-03-11 | 2024-04-12 | 广东柏科电源有限公司 | Dimming control method and dimming circuit |
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