CN204598429U - A kind of LED wireless control system of compatible phase-cut dimming - Google Patents

A kind of LED wireless control system of compatible phase-cut dimming Download PDF

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Publication number
CN204598429U
CN204598429U CN201520333338.9U CN201520333338U CN204598429U CN 204598429 U CN204598429 U CN 204598429U CN 201520333338 U CN201520333338 U CN 201520333338U CN 204598429 U CN204598429 U CN 204598429U
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phase
circuit
unit
cut dimming
wireless
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吴江明
陈欣平
杜罡
叶飞
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Hengdian Group Tospo Lighting Co Ltd
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Hengdian Group Tospo Lighting Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The utility model discloses a kind of LED wireless control system of compatible phase-cut dimming, control system comprises phase-cut dimming unit, wireless energy control units, supply control unit, described phase-cut dimming unit is connected with wireless energy control units and supply control unit respectively, and described supply control unit is also connected with controlled in wireless; Described phase-cut dimming unit, for adjusting output current size by cut signal, pwm signal or analog signal; Described wireless energy control units, for being converted to pwm signal or analog signal to phase-cut dimming unit by wireless signal; Described supply control unit, for obtaining energy from phase-cut dimming unit, for wireless energy control units provides lasting electric energy.LED of the present utility model controls power supply and can be directly installed in existing phase-cut dimming circuit, and need not rewiring, Radio Control Function can be used to realize open and close, light modulation, color-temperature regulating in compatible phase-cut dimmer simultaneously.

Description

A kind of LED wireless control system of compatible phase-cut dimming
Technical field
The utility model relates to field of LED illumination, particularly a kind of LED wireless control system of compatible phase-cut dimming.
Background technology
Phase-cut dimming: phase-cut dimming two kinds of control modes after phase-cut dimming and transistor before controllable silicon can being divided into by circuit implementations (cry again forward position or rear along, frontly to cut or rear cut controlled dimming), before controllable silicon, phase-cut dimming generally adopts half control device controllable silicon to be used as switch copped wave device, and rear generally employing along phase-controlled dimming controls switching device (as IGBT, MOSFET or bipolar transistor BJT) entirely as switch copped wave device.Before controllable silicon, phase-cut dimming circuit structure is simple, and cost is low, easy to use, but EMI and EMC interference is large, and circuit power factor (PF) value is low.Usual employing controllable silicon dimmer realizes common incandescent lamp and tungsten halogen lamp light modulation.Because incandescent lamp and tungsten halogen lamp are a kind of pure resistive luminescent devices, do not require that input voltage must be sinusoidal wave, its operating current waveform is the same with operating voltage waveform, so no matter how operating voltage waveform departs from sine wave, as long as change the effective value of input voltage, the brightness adjustment control of incandescent lamp and tungsten halogen lamp just can be realized.Before adopting controllable silicon, phase-cut dimming realizes, to forward position waveform cutting (leading edge phase-control) of input AC civil power sine wave, reaching change and being added to lamp load effective voltage value object by controlling the silicon controlled angle of flow.And, before LED, phase-cut dimming can cause the problem of controllable silicon job insecurity when the luminosity of LED is transferred to very low, leadage circuit need be added in front phase-cut dimming circuit, guarantee phase-cut dimming controllable silicon reliably working, this leakage current general is about 10mA (occurrence is relevant with phase-controlled dimming silicon controlled model), and like this, leadage circuit will consume the power of 1 ~ 2W, reduce the operating efficiency of light adjusting circuit, and leadage circuit also can produce heat.Before LED, phase-cut dimming also can make circuit produce vibration due to the LC filter of LED drive power input, and this vibration is not large problem for incandescent lamp and tungsten halogen lamp light modulation, because the thermal inertia of incandescent lamp and tungsten halogen lamp makes human eye not see this vibration at all.But the problem of audio-frequency noise and LED light-emitting flash will be produced to the driving power of LED.After transistor, phase-cut dimming circuit structure wants complicated many compared with controllable silicon leading edge phase-control dimmer circuit, have employed the chop control that full control device IGBT is used as to exchange input civil power in circuit.The chopped waveform change of the comparatively front phase-cut dimming of chopped waveform of rear phase-cut dimming is comparatively level and smooth, and the comparatively front phase-cut dimming circuit of EMI and EMC of rear phase-cut dimming is low.LED phase-cut dimming, changes the waveform exchanging input mains-supplied sine wave, reduces the power factor of circuit, circuit power factor value usually can be made lower than 0.5, and the angle of flow more low-power factor is poorer.Equally, non-sinusoidal voltage waveform increases the total harmonic distortion coefficient of circuit, can produce serious interference signal.Be provided with in the circuit of phase-cut dimmer, cannot have directly used wirelessly controlled LED lamp, if desired used wirelessly controlled LED lamp, then need rewiring.
Utility model content
Main purpose of the present utility model is that the shortcoming overcoming prior art is with not enough, provides a kind of LED wireless control system of compatible phase-cut dimming.
The utility model is by the following technical solutions:
A kind of LED wireless control system of compatible phase-cut dimming, comprise phase-cut dimming unit, wireless energy control units, supply control unit, described phase-cut dimming unit is connected with wireless energy control units and supply control unit respectively, and described supply control unit is also connected with controlled in wireless;
Described phase-cut dimming unit, for adjusting output current size by cut signal, pwm signal or analog signal;
Described wireless energy control units, for being converted to pwm signal or analog signal to phase-cut dimming unit by wireless signal;
Described supply control unit, for obtaining energy from phase-cut dimming unit, for wireless energy control units provides lasting electric energy.
Preferably, described phase-cut dimming unit comprises: EMI filter circuit, Damper circuit, Bleeder circuit, phase detecting circuit, load abnormal circuit for detecting, PWM process chip and power conversion circuits, described EMI filter circuit is connected with Damper circuit and Bleeder circuit, Damper circuit is connected with phase detecting circuit with after Bleeder circuit in parallel, phase detecting circuit is connected with PWM process chip, described PWM process chip is connected with load abnormal circuit, and power conversion circuits is connected with PWM process chip and Damper circuit;
EMI filter circuit, makes whole phase-cut dimming unit meet EMI requirement, absorbs lightning stroke surge energy;
Damper circuit, the work for phase-cut dimmer provides maintenance electric current, and phase-cut dimmer is normally worked;
Bleeder circuit, for phase-cut dimmer provides enough starting currents;
Phase detecting circuit, cut phase place in testing circuit main line, provides signal to adjust output current to power conversion circuits road;
Load abnormal circuit for detecting, detects the operating state of LED load, in time the operating state of adjustment power conversion circuits;
PWM process chip, the pwm signal according to wireless energy control units transmission makes corresponding action, controls power conversion circuits, makes it export rational electric current;
Power conversion circuits, is converted to the electric current meeting LED load and normally work by the electrical quantity of elementary survey, adjust output current according to the signal that PWM process chip and phase detecting circuit provide.
Preferably, described wireless energy control units comprises antenna element, link control unit, link management unit and software storage unit;
Antenna element, for collection and the transmission of wireless signal, and transfers internal code to and is supplied to url management unit by signal;
Link control unit, firmware portions comprises wireless control chip and peripheral components, for accepting the internal code of link management unit, converts internal code process to pwm signal; Described link control unit one end is connected with supply control unit, the electric energy needed for acquisition work, and the other end of link control unit is connected with phase-cut dimming unit, pwm signal is transferred to phase-cut dimming unit and connects;
Link management unit: for processing software program, is converted to the discernible code transfer of firmware to link control unit, makes link control unit export different pwm signals according to code;
Software storage unit: for storing software program, so that link management unit is called at any time.
Preferably, described supply control unit comprises linear voltage-stabilizing circuit: for wireless energy control units provides a stable voltage and enough electric currents.
Preferably, described supply control unit also comprises battery charging and discharging management circuit, described battery charging and discharging management circuit is used for the charge and discharge process of intelligent control circuit, when wireless energy control units is powered normal, stop the electric discharge of battery, transfer charging process to, after battery is full of, be converted to standby mode, and monitoring is kept to the supply line of wireless energy control units; During wireless energy control units electricity shortage, enable storage battery in time, guarantee the work that wireless energy control units is continual and steady.
Preferably, also comprising when the energy shortage that supply control unit directly obtains from phase-cut dimming unit is to meet wireless energy control units is the electrical storage device that supply control unit is powered, and described electrical storage device is connected with supply control unit.
Preferably, described electrical storage device is storage battery.
A control method for the LED wireless control system of compatible phase-cut dimming, comprises the steps:
After the work of phase-cut dimming unit starting, supply control unit is detected the need of starting storage battery by the inductor winding of phase-cut dimming unit, and power to wireless energy control units, start wireless energy control units, wireless energy control units receives wireless signal, and identification judgement is carried out to wireless signal, after being identified as useful signal, signal is decoded, convert the pwm signal of inner definition to, pwm signal is transferred to the PWM processing unit of phase-cut dimming unit by wireless energy control units, PWM is converted to the change of output current by phase-cut dimming unit, determine whether state of a control to feed back to user terminal according to arranging of wireless energy control units.
Preferably, when powering for supply control unit when the energy shortage that supply control unit directly obtains from phase-cut dimming unit is to meet wireless energy control units, storage battery is used to power for supply control unit.
Preferably, when using storage battery power supply:
(1) use phase-cut dimming mode, output current is adjusted to X*I, wherein 0≤X≤1, electric current when I is fully loaded output, use controlled in wireless mode can control output current and change between 0 ~ X*I;
(2) use controlled in wireless mode, output current is adjusted to Y*I, wherein 0≤Y≤1, electric current when I is fully loaded output, use phase-cut dimming mode can control output current and change between 0 ~ Y*I;
(3) when the power supply of phase-cut dimming unit enough meets the normal work of wireless energy control units, power supply management unit charges a battery simultaneously; When phase-cut dimming unit cannot meet the normal work of wireless energy control units, power supply management unit stops charging a battery, and power to wireless energy control units by storage battery is independent, the power-on time of storage battery is determined by its capacity simultaneously;
(4) when accumulator electric-quantity reaches preset lower limit, reminding user change current state can be carried out by buzzer or output flicker, the software of wireless energy control units can set when in this state, and acquiescence is closed or acquiescence reaches the minimum output current output that can charge a battery.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
1, the LED control system that controls of existing employing wireless, cannot compatible phase-cut dimming, phase-cut dimmer must be removed when mounted, otherwise whole system can be made normally to work, even cause danger.LED of the present utility model controls power supply and can be directly installed in existing phase-cut dimming circuit, and need not rewiring, Radio Control Function can be used to realize open and close, light modulation, color-temperature regulating in compatible phase-cut dimmer simultaneously.
2, the utility model can be networked with other electrical equipment by Radio Control Function, realizes remote collaborative and controls.When user terminal is lost, use phase-cut dimmer, can smoothing light modulation, required illuminating effect can be reached equally.
3, the defect of level and smooth light modulation cannot be realized when the utility model can well overcome the user terminal loss of the LED control system that existing employing wireless controls.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Embodiment
As shown in Figure 2, a kind of LED wireless control system of compatible phase-cut dimming, comprise phase-cut dimming unit, wireless energy control units, supply control unit, described phase-cut dimming unit is connected with wireless energy control units and supply control unit respectively, and described supply control unit is also connected with controlled in wireless; Described phase-cut dimming unit, for adjusting output current size by cut signal, pwm signal or analog signal; Described wireless energy control units, is converted to pwm signal or analog signal to phase-cut dimming unit for just wireless signal; Described supply control unit, for obtaining energy from phase-cut dimming unit, for wireless energy control units provides lasting electric energy.
Described phase-cut dimming unit comprises: EMI filter circuit, Damper circuit, Bleeder current phase testing circuit, load abnormal circuit for detecting, PWM process chip and power conversion circuits; Described EMI filter circuit is connected with Damper circuit and Bleeder circuit, Damper circuit is connected with phase detecting circuit with after Bleeder circuit in parallel, phase detecting circuit is connected with PWM process chip, described PWM process chip is connected with load abnormal circuit, and power conversion circuits is connected with PWM process chip and Damper circuit;
EMI filter circuit: make whole circuit meet EMI requirement, absorbs lightning stroke surge energy; As shown in Figure 2, EMI filter circuit comprises the components and parts such as L1, L2, L3, CX1, RS1, RS2, C4, and after L2, L3 parallel connection, one end connects L1, and it is in parallel that the other end connects L4, L3 and RS1, and L2 and RS2 is in parallel, and CX1 is connected between L2 and L3.
Circuit: the work for phase-cut dimmer provides maintenance electric current, makes phase-cut dimmer normally work; As shown in Figure 2, Damper circuit specifically comprises CS1, Q1, C2, R3, and electric capacity CS1 is connected with the grid of metal-oxide-semiconductor Q1, and the drain electrode of electric capacity C2 and Q1 connects, and R3 is connected between the drain electrode of Q1 and source electrode.
Bleeder circuit: for phase-cut dimmer provides enough starting currents; As shown in Figure 2, Bleeder circuit specifically comprises R1, C1, R2, and described R1, C1, R2 are connected in series.
Phase detecting circuit: cut phase place in testing circuit main line, provides signal to adjust output current to power conversion circuits road; As shown in Figure 2, phase detecting circuit comprises RS4, RS5, CS2, U1; RS4RS5 connects, and is connected after RS5 and CS2 parallel connection with U1.
Load abnormal circuit for detecting: the operating state being detected LED load by the winding of T1, the in time operating state of adjustment power conversion circuits; As shown in Figure 2, load abnormal circuit for detecting specifically comprises NTC1, RS11, RS13, RS14, DS5, U1; Be connected to U1 after RS13 and RS14 parallel connection, after NTC1 and RS11 series connection, be connected to U1.
PWM process chip: the pwm signal according to wireless energy control units transmission makes corresponding action, controls power conversion circuits, makes it export rational electric current; As shown in Figure 2, PWM process chip is specially U1 processor.
Power conversion circuits: the electrical quantity of elementary survey is converted to the electric current meeting LED load and normally work, adjusts output current according to the signal that PWM process chip and phase detecting circuit provide.As shown in Figure 2, power conversion circuits specifically comprises RS6, RS7, DS1, CS4, Z2, DS2, Q2, T1 and U1; RS6 and CS4 connects, and is connected to the negative electrode of DS1 and DS2, is connected to the grid of Q2 after RS7 and DS1 parallel connection after CS4 and Z2 parallel connection, and Q2 and T1 connects.
Described wireless energy control units comprises antenna element, link control unit, link management unit and software storage unit; Antenna element: for collection and the transmission of wireless signal, and signal is transferred to internal code and be supplied to url management unit; Link control unit: firmware portions comprises wireless control chip and peripheral components, for accepting the code of link management unit, converts code process to pwm signal; Link management unit: for processing software program, is converted to the discernible code transfer of firmware to link control unit, makes link control unit export different pwm signals according to code; Software storage unit: for storing software program, so that link management unit is called at any time.
Described supply control unit comprises: linear voltage-stabilizing circuit: for wireless energy control units provides a stable voltage and enough electric currents; Battery charging and discharging management circuit (nonessential): the charge and discharge process of intelligent control circuit, when wireless energy control units is powered normal, stop the electric discharge of battery, transfer charging process to, be converted to standby mode after battery is full of, and monitoring is kept to the supply line of wireless energy control units; During wireless energy control units electricity shortage, enable storage battery in time, guarantee the work that wireless energy control units is continual and steady.
The control method of the LED wireless control system of a kind of compatible phase-cut dimming of the present embodiment, comprises the steps:
After the work of phase-cut dimming unit starting, supply control unit is detected the need of starting storage battery by the inductor winding of phase-cut dimming unit, and power to wireless energy control units, start wireless energy control units, wireless energy control units receives wireless signal, and identification judgement is carried out to wireless signal, after being identified as useful signal, signal is decoded, convert the pwm signal of inner definition to, pwm signal is transferred to the PWM processing unit of phase-cut dimming unit by wireless energy control units, PWM is converted to the change of output current by phase-cut dimming unit, determine whether state of a control to feed back to user terminal according to arranging of wireless energy control units.
When powering for supply control unit when the energy shortage that supply control unit directly obtains from phase-cut dimming unit is to meet wireless energy control units, storage battery is used to power for supply control unit.
In the present embodiment, it is the electrical storage device that supply control unit is powered that described wireless LED controls that power supply also comprises when the energy shortage that supply control unit directly obtains from phase-cut dimming unit is to meet wireless energy control units, and described electrical storage device is connected with supply control unit.
In the utility model, electrical storage device (for storage battery in the present embodiment) is nonessential components and parts, but can significantly promote result of use of the present utility model when using.
Just use storage battery and do not use the technical scheme of storage battery two kinds of methods to the present embodiment to be further described below:
1, storage battery scheme is used
(1) use phase-cut dimming mode, output current is adjusted to X*I (0≤X≤1, electric current when I is fully loaded output), uses controlled in wireless mode can control output current and change between 0 ~ X*I;
(2) use controlled in wireless mode, output current is adjusted to Y*I (0≤Y≤1, electric current when I is fully loaded output), uses phase-cut dimming mode can control output current and change between 0 ~ Y*I;
(3) when the power supply of phase-cut dimming unit enough meets the normal work of wireless energy control units, power supply management unit charges a battery simultaneously; When phase-cut dimming unit cannot meet the normal work of wireless energy control units, power supply management unit stops charging a battery, and powers by storage battery is independent to wireless energy control units simultaneously.The power-on time of storage battery is determined by its capacity;
(4) when accumulator electric-quantity reaches preset lower limit, reminding user change current state can be carried out by buzzer or output flicker.The software of wireless energy control units can set when in this state, and acquiescence is closed or acquiescence reaches the minimum output current output that can charge a battery.
2, storage battery scheme is not used:
Use this mode, output current cannot be adjusted to zero, for convenience of statement,
Setting: the output current of prescribing a time limit down that power supply management unit is powered to wireless energy control units is set to Z*I (0<Z<1).
(1) use phase-cut dimming mode, output current is adjusted to X*I (Z<X≤1, electric current when I is fully loaded output), uses controlled in wireless mode can control output current and change between Z*I ~ X*I;
(2) use controlled in wireless mode, output current is adjusted to Y*I (Z<Y≤1, electric current when I is fully loaded output), uses phase-cut dimming mode can control output current and change between Z*I ~ Y*I;
(3) the output current lower limit of phase-cut dimming unit is Z*I (0<Z<1), and wireless energy control units controls the lower limit Z*I (0<Z<1) of output current.
Above-described embodiment is the utility model preferably execution mode; but execution mode of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection range of the present utility model.

Claims (7)

1. the LED wireless control system of a compatible phase-cut dimming, it is characterized in that, comprise phase-cut dimming unit, wireless energy control units, supply control unit, described phase-cut dimming unit is connected with wireless energy control units and supply control unit respectively, and described supply control unit is also connected with controlled in wireless;
Described phase-cut dimming unit, for adjusting output current size by cut signal, pwm signal or analog signal;
Described wireless energy control units, for being converted to pwm signal or analog signal to phase-cut dimming unit by wireless signal;
Described supply control unit, for obtaining energy from phase-cut dimming unit, for wireless energy control units provides lasting electric energy.
2. the LED wireless control system of compatible phase-cut dimming according to claim 1, it is characterized in that, described phase-cut dimming unit comprises: EMI filter circuit, Damper circuit, Bleeder circuit, phase detecting circuit, load abnormal circuit for detecting, PWM process chip and power conversion circuits, described EMI filter circuit is connected with Damper circuit and Bleeder circuit, Damper circuit is connected with phase detecting circuit with after Bleeder circuit in parallel, phase detecting circuit is connected with PWM process chip, described PWM process chip is connected with load abnormal circuit, power conversion circuits is connected with PWM process chip and Damper circuit,
EMI filter circuit, makes whole phase-cut dimming unit meet EMI requirement, absorbs lightning stroke surge energy;
Damper circuit, the work for phase-cut dimmer provides maintenance electric current, and phase-cut dimmer is normally worked;
Bleeder circuit, for phase-cut dimmer provides enough starting currents;
Phase detecting circuit, cut phase place in testing circuit main line, provides signal to adjust output current to power conversion circuits road;
Load abnormal circuit for detecting, detects the operating state of LED load, in time the operating state of adjustment power conversion circuits;
PWM process chip, the pwm signal according to wireless energy control units transmission makes corresponding action, controls power conversion circuits, makes it export rational electric current;
Power conversion circuits, is converted to the electric current meeting LED load and normally work by the electrical quantity of elementary survey, adjust output current according to the signal that PWM process chip and phase detecting circuit provide.
3. the LED wireless control system of compatible phase-cut dimming according to claim 1, is characterized in that, described wireless energy control units comprises antenna element, link control unit, link management unit and software storage unit;
Antenna element, for collection and the transmission of wireless signal, and transfers internal code to and is supplied to url management unit by signal;
Link control unit, firmware portions comprises wireless control chip and peripheral components, for accepting the internal code of link management unit, converts internal code process to pwm signal; Described link control unit one end is connected with supply control unit, the electric energy needed for acquisition work, and the other end of link control unit is connected with phase-cut dimming unit, pwm signal is transferred to phase-cut dimming unit and connects;
Link management unit: for processing software program, is converted to the discernible code transfer of firmware to link control unit, makes link control unit export different pwm signals according to code;
Software storage unit: for storing software program, so that link management unit is called at any time.
4. the LED wireless control system of compatible phase-cut dimming according to claim 1, is characterized in that, described supply control unit comprises linear voltage-stabilizing circuit: for wireless energy control units provides a stable voltage and enough electric currents.
5. the LED wireless control system of compatible phase-cut dimming according to claim 4, it is characterized in that, described supply control unit also comprises battery charging and discharging management circuit, described battery charging and discharging management circuit is used for the charge and discharge process of intelligent control circuit, when wireless energy control units is powered normal, stop the electric discharge of battery, transfer charging process to, be converted to standby mode after battery is full of, and monitoring is kept to the supply line of wireless energy control units; During wireless energy control units electricity shortage, enable storage battery in time, guarantee the work that wireless energy control units is continual and steady.
6. the LED wireless control system of the compatible phase-cut dimming according to any one of claim 1-5, it is characterized in that, also comprising when the energy shortage that supply control unit directly obtains from phase-cut dimming unit is to meet wireless energy control units is the electrical storage device that supply control unit is powered, and described electrical storage device is connected with supply control unit.
7. the LED wireless control system of compatible phase-cut dimming according to claim 6, is characterized in that, described electrical storage device is storage battery.
CN201520333338.9U 2015-05-21 2015-05-21 A kind of LED wireless control system of compatible phase-cut dimming Active CN204598429U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104837276A (en) * 2015-05-21 2015-08-12 横店集团得邦照明股份有限公司 LED wireless control system capable of being compatible with phase cut dimming and control method
CN105101571A (en) * 2015-09-06 2015-11-25 东莞市擎洲光电科技有限公司 Intelligent switch dimming control circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104837276A (en) * 2015-05-21 2015-08-12 横店集团得邦照明股份有限公司 LED wireless control system capable of being compatible with phase cut dimming and control method
CN104837276B (en) * 2015-05-21 2018-03-02 横店集团得邦照明股份有限公司 The LED wireless control systems and control method of a kind of compatible phase-cut dimming
CN105101571A (en) * 2015-09-06 2015-11-25 东莞市擎洲光电科技有限公司 Intelligent switch dimming control circuit

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