CN107517520A - A kind of wall control that LED brightness control signal is sent by single live wire switchs - Google Patents
A kind of wall control that LED brightness control signal is sent by single live wire switchs Download PDFInfo
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- CN107517520A CN107517520A CN201710790926.9A CN201710790926A CN107517520A CN 107517520 A CN107517520 A CN 107517520A CN 201710790926 A CN201710790926 A CN 201710790926A CN 107517520 A CN107517520 A CN 107517520A
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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]
- H05B45/10—Controlling the intensity of the light
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Abstract
A kind of wall control that LED brightness control signal is sent by single live wire switchs, including single fire-wire power module, single chip control module, phase shift drive module, zero passage detection module, the given module of brightness.When needing to change LED brightness, wall control switch sends brightness control signal being controlled using phase-shifting trigger, being made up of guiding waveform and data waveform by single live wire, brightness degree in its data waveform is represented with the quantity of the continuous single-phase half-sinusoid with specific phase shifting angle, when LED is in illuminating state and does not send brightness control signal, the voltage waveform on single live wire is continuous whole single-phase sine wave.LED regulation driver element changes the brightness of LED according to the brightness data in the brightness control signal received.The LED light-dimming method is without remote control, without individually laying control line, without laying power line again, it is possible to achieve the replacement upgrading of general lighting lamp.
Description
Present patent application is divisional application, and original bill Application No. 201510229126.0, the applying date is on May 8th, 2015,
A kind of entitled wall controlled LED lamp low harmony wave light-dimming method.
Technical field
It is especially a kind of that LED brilliance control is sent by single live wire the present invention relates to a kind of illuminator control technology
The wall control switch of signal.
Background technology
Due to the nonlinear characteristic of LED, the brightness of LED can not be realized by the way of voltage is adjusted.
During using controllable constant-current source to adjust the brightness of LED, the change of operating current can bring the chromatogram of LED inclined
Move, meanwhile, LED load current also becomes very low under low-light level, can increase the reduction of controllable constant-current source efficiency and temperature rise, be lost
Power consumption on driving chip is bigger, so as to damage the life-span of constant-current source and LED light source.
LED brightness is controlled using PWM (pulsewidth modulation) dimming mode, voltage regulating mode can be avoided and adjust current system band
The problem of coming.Currently used LED light-dimming method has three kinds：
First, use remote control control.LED control circuit is equipped with remote control device, can be by remote control to LED
Level light modulation either stepless dimming is carried out, its shortcoming is that a LED needs to be equipped with a remote control, causes remote control quantity
More, management bothers, and cost is also higher.
Second, use digital control technology.For example, using DALI (lighting interface of digital address) technology, DALI systems
Software can be separately addressed to the single or multiple LED lamps on same forceful electric power loop or different circuit, pass through DALI systems
Software accurately dim and switch controlling to single lamp or arbitrary lamp group.Program advanced technology, but cost is very high, system
In addition to needing to lay power line, it is also necessary to lay control line.
Third, use single live wire switch on and off control technology.For example, using NU102 special chips, you can utilize common wall
Face switchs the switch motion within the defined time, realizes the brightness regulation of LED.But this method can only provide 4 grades of LEDs
Adjust brightness, and the requirement of switch motion having time.
The content of the invention
The purpose of the present invention is intended in the case of not changing existing illuminating line wiring, there is provided one kind is sent using single live wire
The wall control switch and brightness control signal sending method of LED brightness control signal.
To reach above-mentioned purpose, the present invention adopts the technical scheme that：The wall control switch is provided with single live wire input, list
Fire wire output end；Single live wire input is connected to AC power live wire；The AC power is single-phase 220V alternating currents.
The wall control switch is by single fire-wire power module, single chip control module, phase shift drive module, zero passage detection mould
Block, brightness give module composition.
The wall control switch is also known as wall control switch element.The brightness of LED is driven by wall control switch element and LED regulation
The device of moving cell composition is realized.The LED regulation driver element is provided with live wire input, zero line input, wherein, it is described
Live wire input is connected to single fire wire output end of wall control switch element, and the zero line input is connected to AC power zero line.
The LED regulation driver element is made up of single-chip microcomputer adjustment module, LED drive module.
The wall control switch element sends brightness control signal by the voltage waveform for controlling single fire wire output end to export,
Its method is,
Step A, judge whether to close LED, be to close LED, go to step C；Otherwise step B is gone to；
Step B, send a brightness control signal；
Step C, judges whether the brightness degree of brightness control signal changes, and brightness degree changes, return to step A；
Brightness degree does not change, and maintenance does not send brightness control signal state, return to step C.
The maintenance does not send brightness control signal state, and when LED is in closed mode, single fire wire output end flows through
Micro-current；The maintenance does not send brightness control signal state, when LED is in illuminating state, single fire wire output end output
Voltage waveform be continuous whole single-phase sine wave.
It is described to send a brightness control signal, including guiding waveform is sent, then and then send data waveform.
The guiding waveform is made up of a negative half-wave being not turned on, immediately a positive half-wave completely turned on；It is described to draw
Guided wave shape can also be by a complete cycle being not turned on, an immediately positive half-wave composition completely turned on.
The data waveform is all made up of continuous K phase shifting angle for α single-phase half-sinusoid, its brilliance control sent letter
Number brightness degree be brightness K, K is more than or equal to the 1, integer less than or equal to 9.The representative value of the phase shifting angle α is 30 °.
The LED regulation driver element receives brightness control signal by single-chip microcomputer adjustment module and controls brightness, its side
Method is,
Step 1, initialization, it is original intensity to control LED；
Step 2, judge whether there is brightness control signal on single live wire；There is no brightness control signal, return to step two；There is brightness
Control signal, go to step 3；
Step 3, brightness control signal is received, determines brightness degree；
Step 4, change LED brightness；Return to step two.
Described to judge whether there is brightness control signal on single live wire, method is to judge whether there is brilliance control letter on single live wire
Number guiding waveform.
The reception brightness control signal, determines brightness degree, and method is to judge that phase shifting angle is the single-phase of α in data waveform
The number of half-sinusoid；There is the single-phase half-sinusoid that continuous K phase shifting angle is α, the brightness degree of brightness control signal is brightness
K。
The change LED brightness, the PWM that LED regulation driver element is connected to by the change of single-chip microcomputer adjustment module are bright
The dutycycle for spending Regulate signal is realized.
Described to send guiding waveform, method is that single chip control module stops trigger signal output at random, waits zero passage inspection
Survey the zero cross signal of module output；A trigger pulse for being no more than 10ms is sent in the falling edge of zero cross signal.
The zero cross signal produces after single chip control module stops trigger signal output at random, is born with AC power
Half-wave is corresponding and width close to 10ms positive pulse.
Described to send data waveform, method is, in the phase shifting angle α triggering moments of each single-phase half-sinusoid of data waveform,
Single chip control module sends a narrow trigger pulse.
The phase shifting angle α triggering moments of each single-phase half-sinusoid of the data waveform, it is the trailing edge work with zero cross signal
For time zero, the timing that is delayed successively obtains.
When the LED is in closed mode, single chip control module stops output trigger signal.
Single fire-wire power module has single live wire OFF state current-taking function and ON state current-taking function, for being switched to wall control
Unit provides working power.
The zero passage detection module is halfwave rectifier bleeder circuit, can detect the zero cross signal of the AC power, and
It is supplied to single chip control module.
The brightness, which gives module, can provide the brightness degree of brightness control signal to single chip control module.
The phase shift drive module is that bidirectional thyristor exchanges phase-shift circuit.
Brightness degree of the single chip control module according to brightness control signal, send trigger signal control phase shift driving
Module sends brightness control signal to LED regulation driver element power supply, and to LED regulation driver element.
The LED drive module is provided with ac input end and LED drive end, wherein, ac input end is connected to LED
The live wire input and zero line input of driver element are adjusted, LED drive end is connected to LED.
The LED drive module is additionally provided with PWM brightness regulated signal inputs.
The single-chip microcomputer adjustment module includes regulation single-chip microcomputer, positive half-wave rectification shaping circuit, negative halfwave rectifier shaping
Circuit and regulator rectifier circuit, provided with ac input end, PWM brightness regulated signal output ends；The ac input end is connected to
LED adjusts the live wire input and zero line input of driver element, and PWM brightness regulated signal output ends are connected to LED drivings
The PWM brightness regulated signal inputs of module；The positive half-wave rectification shaping circuit and negative halfwave rectifier shaping circuit are right respectively
The alternating voltage of live wire input input carries out positive half-wave rectification shaping and negative halfwave rectifier shaping；The positive half-wave rectification shaping
The output for exporting, bearing halfwave rectifier shaping circuit of circuit is respectively connecting to adjust the different pulse capture input of single-chip microcomputer.
The guiding waveform for judging whether to have brightness control signal on single live wire, method are the negative halfwave rectifier shaping of judgement
The waveform of circuit output has negative half-wave pulse to lack, and the positive half-wave waveform of ensuing positive half-wave rectification shaping circuit output is complete
It is whole.
It is described to judge that for phase shifting angle for the number of α single-phase half-sinusoid, method is negative halfwave rectifier shaping in data waveform
In the positive half-wave waveform of waveform and positive half-wave rectification the shaping circuit output of circuit output, pulse width is after waveform is guided
The number of 180 ° of-α of angle pulse.
The invention has the advantages that LED brightness control signal is sent using single live wire mode, without remote control, nothing
Control line is needed, without laying power line again, it is possible to achieve the replacement upgrading of general lighting lamp；LED brightness regulation is divided into 9
Shelves, are adjusted using knob assembly, meet operating habit；Brightness control signal on single live wire is only to be carried out when changing brightness
Send in short-term, when LED is in illuminating state and does not send brightness control signal, the voltage waveform of single fire wire output end output is
Continuous whole single-phase sine wave, without harmonic wave；Turned off the light function with single-fire-wire electronic switch.
Brief description of the drawings
The LED brightness regulating apparatus block diagram that Fig. 1 is made up of wall control switch element and LED regulation driver element.
Fig. 2 is wall control switch element structure chart.
Fig. 3 is wall control switch element embodiment circuit diagram.
Fig. 4 is the α angles schematic diagram of data waveform.
Fig. 5 is the waveform example figure for sending brightness degree 3.
Fig. 6 is the waveform example figure for sending brightness degree 2.
Fig. 7 is brightness control signal sending control method.
Fig. 8 is LED regulation structure of driving unit figure.
Fig. 9 is single-chip microcomputer adjustment module embodiment circuit diagram.
Figure 10 is LED drive module embodiment circuit diagram.
Figure 11 is brilliance control adjusting method.
Embodiment
Below by accompanying drawing and the present invention is described in further detail in conjunction with the embodiments, but embodiments of the present invention
Not limited to this.
LED brightness regulating apparatus by wall control switch element and LED regulation driver element as shown in figure 1, be composed in series.
Wall control switch element list live wire AC enters, and single live wire AC1 goes out.LED regulation driver element live wire AC1 enters, and zero line N goes out.
The structure of wall control switch element by single fire-wire power module, single chip control module, phase shift as shown in Fig. 2 driven
Module, zero passage detection module, brightness give module composition.Single fire-wire power module has single live wire OFF state current-taking function, also has
There is ON state current-taking function, for providing working power to wall control switch element.
The AC power zero cross signal of zero passage detection module detection is fed to single chip control module, and brightness gives module and carried
For brightness control signal brightness degree to single chip control module.Brightness of the single chip control module according to brightness control signal
Grade, control phase shift drive module send brightness control to LED regulation driver element power supply, and to LED regulation driver element
Signal processed.
The embodiment circuit of wall control switch element is as shown in Figure 3.
Single fire-wire power module is by single live wire voltage-stablizer U1 and its peripheral cell diode D1, electric capacity C1, electric capacity C2, inductance
L1, inductance L2, and low-dropout regulator U2 and its peripheral cell electric capacity C3, electric capacity C4 composition.Single live wire voltage-stablizer U1 type
Number it is MP-6V-02S, low-dropout regulator U2 model HT7333.
Single live wire input AC is the simulation of wall control switch element, and the alternating voltage for being connected to single live wire voltage-stablizer U1 is public
COM is held altogether；Electric capacity C1 both ends be respectively connecting to single live wire voltage-stablizer U1 filter capacitor input FIL and alternating voltage it is public
Hold COM；Single live wire voltage-stablizer U1 VD GND ends be wall control switch element digitally, inductance L2 both ends
Be respectively connecting to wall control switch element digitally with simulation ground；Diode D1, inductance L1 and electric capacity C2 composition halfwave rectifier filters
Wave circuit, the input of halfwave rectifier filter circuit is connected to single fire wire output end AC1, output is connected to single live wire voltage-stablizer U1's
High direct voltage input HDC.Single live wire voltage-stablizer U1 is additionally provided with DC voltage output end VCC, alternating current pressure side AC.
Low-dropout regulator U2 input VIN is connected to single live wire voltage-stablizer U1 DC voltage output end VCC, output
Hold VOUT outputs+3.3V DC supply VDD；Single live wire voltage-stablizer U1 ground terminal GND is connected to wall control switch element
Digitally；Electric capacity C3, electric capacity C4 are respectively low-dropout regulator U2 input voltage, output voltage filter capacitor.
Phase shift drive module is that bidirectional thyristor exchanges phase-shift circuit, by bidirectional thyristor V1, controllable silicon export optocoupler U3,
Resistance R1, resistance R2, resistance R3 compositions, controllable silicon output optocoupler U3 model MOC3023.Bidirectional thyristor V1 two sun
Extremely it is respectively connecting to single fire wire output end AC1 and single live wire voltage-stablizer U1 alternating current pressure side AC；Resistance R1 is connected in parallel on two-way
IGCT V1 two anode taps；Controllable silicon output optocoupler U3 output controllable silicon is connected with resistance R2, the connection of its series arm
To bidirectional thyristor the V1 first anode and control pole；Controllable silicon output optocoupler U3 input light emitting diode is gone here and there with resistance R3
Connection, its series arm one end are connected to DC supply VDD, and other end is trigger signal input.
Zero passage detection module is halfwave rectifier bleeder circuit, by diode D2, resistance R4, resistance R5, voltage-stabiliser tube DW1 groups
Into.Resistance R4 both ends are respectively connecting to diode D2 negative electrodes and voltage-stabiliser tube DW1 negative electrodes；Diode D2 anodes are connected to single live wire
Output terminals A C1；Voltage-stabiliser tube DW1 anodes are with being connected to the simulation of wall control switch element；Resistance R5 is connected in parallel on voltage-stabiliser tube DW1 both ends.
Zero cross signal exports from voltage-stabiliser tube DW1 negative electrodes.
It is BCD rotary encoder SW1 that brightness, which gives module, output BCD coding 0000-1001, wherein, BCD codings
The brightness degree that 0001-1001 is represented is brightness 1-9, when BCD is encoded to 0000, represents and extinguishes LED.
Brightness, which gives module, to use potentiometer to carry out partial pressure to DC supply VDD, and output area is in 0-
3.3V brightness given voltage.The 0-3.3V of potentiometer output brightness given voltage is divided into 10 sections, minimum electricity
It is corresponding with BCD rotary encoders SW1 coding 0000 between nip, ceiling voltage section and BCD rotary encoders SW1 coding
1001 correspondences.
Single chip control module includes control single chip computer U4, crystal oscillator XT1.Control single chip computer U4 model is
MSP430G2553.Zero cross signal inputs from control single chip computer U4 P2.0, and trigger signal is defeated from control single chip computer U4 P1.1
Go out, the BCD codings that brightness gives module input from P2.4-P2.1.If brightness gives module and uses potentiometer, potentiometer
Output voltage be connected to control single chip computer U4 analog voltage inputs A0 (P1.0).Control single chip computer U4 is by reading P2.4-
The BCD codings of P2.1 inputs, or A/D conversions are carried out to the brightness given voltage of analog voltage input A0 inputs, obtain
The brightness degree of brightness control signal is brightness 0-9.
Wall control switch element sends brightness control signal by controlling the voltage waveform of single fire wire output end AC1 outputs,
When wall control switch element maintains not sending brightness control signal state, single chip control module persistently exports low level triggering letter
Number, bidirectional thyristor V1 constant conductions in addition to zero crossing, the voltage waveform of single fire wire output end AC1 outputs is continuous whole list
Phase sine wave.
When wall control switch element needs to send a brightness control signal, the waveform of a brightness control signal is by guiding
Waveform and immediately data waveform composition；Waveform is guided by a negative half-wave being not turned on, immediately one completely turn on just half
Wave component；Guide waveform can also be by a complete cycle being not turned on, an immediately positive half-wave composition completely turned on.Send
Brightness control signal, including guiding waveform is sent, then and then send data waveform.
Data waveform is all made up of continuous K phase shifting angle for α single-phase half-sinusoid, its brightness control signal sent
Brightness degree is brightness K, and K is more than or equal to the 1, integer less than or equal to 9.
It is illustrated in figure 4 data waveform α angles schematic diagram.As shown in Fig. 5 brightness degree is sent as the once bright of brightness 3
The waveform example figure of control signal is spent, wherein, Fig. 5 (a) is the brightness control signal voltage wave of single fire wire output end AC1 outputs
Shape, Fig. 5 (b) are zero cross signal voltage waveform, and Fig. 5 (c) is that brightness control signal bears voltage waveform after halfwave rectifier shaping, Fig. 5
(d) it is voltage waveform after brightness control signal positive half-wave rectification shaping.
When single fire wire output end AC1 exports continuous whole single-phase sine wave, single fire wire output end AC1 inputs with single live wire
The voltage difference very little between AC is held, zero passage detection module will not export zero cross signal, and zero cross signal is maintained low level state.
It is random to stop trigger signal output when single chip control module needs to send a brightness control signal.Work as stopping
When at the time of exporting trigger signal during AC power positive half-wave, positive half-wave bidirectional thyristor V1 has been turned on, next
Negative half-wave bidirectional thyristor V1 be not turned on, zero passage detection module is in whole negative half-wave output zero cross signal, and zero cross signal is just
Pulse, as shown in the pulse 1 in Fig. 5, the width of pulse 1 is close to 10ms.Single chip control module is sent in the falling edge of pulse 1
One trigger pulse for being no more than 10ms, the ensuing positive half-wave conductings of control bidirectional thyristor V1, pulse 2 are corresponding just half
Voltage waveform after ripple rectification shaping, the width of pulse 2 is close to 10ms.Data waveform each single-phase half-sinusoid phase shifting angle α triggering
At the moment, it is using the trailing edge of zero cross signal as time zero, the timing that is delayed successively obtains.If t moves to be corresponding with phase shifting angle α
Phase time, t=α × 10/180ms；It is the 1st list in data waveform using the trailing edge of pulse 1 as time zero, at 10ms+t
The phase shifting angle α triggering moments of phase half-sinusoid, it is that the phase shifting angle α of the 2nd single-phase half-sinusoid in data waveform is touched at 20ms+t
The moment is sent out, the rest may be inferred, and the phase shifting angle α triggering moments of the single-phase half-sinusoid of k-th are at K × 10ms+t in data waveform.Fig. 5
Middle K value is 3.
When single chip control module needs to send a brightness control signal, it is random at the time of stop trigger signal output
When during the negative half-wave of AC power, the negative half-wave bidirectional thyristor V1 has been turned on, ensuing positive half-wave bidirectional thyristor V1
It is not turned on, but because zero passage detection module using halfwave rectifier, positive half-wave bidirectional thyristor V1 is not turned on, will not also made
Zero detection module exports zero cross signal；Until negative half-wave bidirectional thyristor V1 next is not turned on, zero passage detection module exists
Entirely negative half-wave output zero cross signal, zero cross signal is positive pulse.Example is as shown in fig. 6, Fig. 6 (a) is single fire wire output end AC1
The brightness control signal voltage waveform of output, Fig. 6 (b) are zero cross signal voltage waveform, and Fig. 6 (c) is brightness control signal negative half
Voltage waveform after ripple rectification shaping, Fig. 6 (d) are voltage waveform after brightness control signal positive half-wave rectification shaping.Pulse in Fig. 6
7 be zero cross signal, and its width is close to 10ms.Single chip control module sends one in the falling edge of pulse 7 and is no more than 10ms
Trigger pulse, the ensuing positive half-wave conductings of control bidirectional thyristor V1, pulse 8 is electricity after corresponding positive half-wave rectification shaping
Corrugating, the width of pulse 8 is close to 10ms.It is the 1st in data waveform using the trailing edge of pulse 7 as time zero, at 10ms+t
The phase shifting angle α triggering moments of individual single-phase half-sinusoid, it is the phase shifting angle of the 2nd single-phase half-sinusoid in data waveform at 20ms+t
α triggering moments, the rest may be inferred, and the phase shifting angle α triggering moments of the single-phase half-sinusoid of k-th are at K × 10ms+t in data waveform.
K value is 2 in Fig. 6.
In the phase shifting angle α triggering moments of each single-phase half-sinusoid of data waveform, single chip control module sends one narrow
Trigger pulse, the V1 conductings of control bidirectional thyristor；The width of narrow trigger pulse is no more than angle 180- α, or time
10ms-t.The representative value of narrow trigger pulse width is 1ms, and phase shifting angle α representative value is 30 °.
When the brightness degree of brightness control signal is brightness 0, single chip control module stops output trigger signal, two-way crystalline substance
Brake tube V1 is turned off, and LED is extinguished, and single fire wire output end AC1 flows through micro-current.
Fig. 7 is brightness control signal sending control method, is realized by the program in single chip control module, its method
It is：
Step A, judge whether to close LED, be to close LED, go to step C；Otherwise step B is gone to；
Step B, a brightness control signal is sent, including send guiding waveform, then and then send data waveform；
Step C, judges whether the brightness degree of brightness control signal changes, and brightness degree changes, return to step A；
Brightness degree does not change, return to step C.
When wall control switch element does not send brightness control signal, when LED is in illuminating state, single fire wire output end AC1
The voltage waveform of output is continuous whole single-phase sine wave.
LED adjusts structure of driving unit as shown in figure 8, being made up of single-chip microcomputer adjustment module, LED drive module, monolithic
The ac input end of machine adjustment module and LED drive module is connected to live wire input AC1, zero line input N.
LED drive module is used to drive LED to light, all LED driving moulds provided with PWM brightness regulated signal inputs
Block is suitable for LED regulation driver element.
Single-chip microcomputer adjustment module is provided with PWM brightness regulated signals output end and is connected to the PWM brightness tune of LED drive module
Save signal input part.
The embodiment circuit of single-chip microcomputer adjustment module is as shown in Figure 9.
In embodiment illustrated in fig. 9, single-chip microcomputer adjustment module is by regulation single-chip microcomputer U5, diode D3, diode D4, diode
D5, diode D6, diode D7, diode D8, voltage-stabiliser tube DW2, voltage-stabiliser tube DW3, voltage-stabiliser tube DW4, resistance R6, resistance R7, electricity
Hinder R8, electric capacity C5, crystal oscillator XT2 compositions.
Diode D3, diode D4 negative electrodes, diode D5, diode D6, electric capacity C5, resistance R6, voltage-stabiliser tube DW2 compositions are whole
Mu balanced circuit is flowed, power supply is provided to regulation single-chip microcomputer U5.
Diode D8, resistance R8, voltage-stabiliser tube DW4 compositions bear halfwave rectifier shaping circuit, negative half obtained on voltage-stabiliser tube DW4
Shown in ripple waveform such as Fig. 5 (c), Fig. 6 (c)；Diode D7, resistance R7, voltage-stabiliser tube DW3 composition positive half-wave rectification shaping circuits, surely
Shown in the positive half-wave waveform obtained on pressure pipe DW3 such as Fig. 5 (d), Fig. 6 (d).Positive half-wave rectification shaping circuit and negative halfwave rectifier are whole
Shape circuit carries out positive half-wave rectification shaping and negative halfwave rectifier shaping to the alternating voltage of live wire input AC1 inputs respectively.Just
The output for exporting, bearing halfwave rectifier shaping circuit of halfwave rectifier shaping circuit is respectively connecting to adjust single-chip microcomputer U5 seizure ratio
Compared with input P2.0, compare input P2.1.
Single-chip microcomputer U5 model MSP430G2553 are adjusted, its PWM output end P1.2 is that the PWM brightness regulated signals are defeated
Go out end.Adjust single-chip microcomputer U5 power supply negative input end VSS with being connected to common reference.
LED drive module is used to drive LED to light, and the LED drive module provided with PWM brightness regulated signal inputs is all
Go for LED regulation driver element, be only one of embodiment circuit shown in Figure 10.
In Figure 10, LED drive module is by LED driver U6, diode D9, diode D10, diode D11, diode
D12, electric capacity C6, electric capacity C7, electric capacity C8, inductance L3, fast recovery diode D13, switching tube VD, resistance R9, resistance R10 compositions.
LED driver U6 model HV9910.
In Figure 10, diode D9, diode D10, diode D11, diode D12 composition single phase bridge type rectifier circus.It is single
2 ac input ends of phase bridge rectifier are respectively connecting to live wire input AC1, zero line input N, direct current output negative terminal
With being connected to common reference, direct current output anode is connected to electric capacity C6 positive poles, electric capacity C7 one end, LED driver U6 power supply
Input VIN, inductance L3 one end, fast recovery diode D13 negative electrodes.LED driver U6 ground input GND is connected to public
Reference ground.Electric capacity C6 negative poles, the electric capacity C7 other end are with being connected to common reference.Fast recovery diode D13 anodes and switching tube
Negative polarity connection end LED- after VD drain electrode connection as high-powered LED lamp, inductance L3 other end is as high-power
The positive polarity connection end LED+ of LED.Switching tube VD source electrode after the client links of resistance R9 mono- with being connected to the LED driver U6
LED current test side CS；The resistance R9 other end is with being connected to common reference.Switching tube VD grid is connected to LED drivings
Device U6 drive end GATE；Resistance R10 one end is connected to LED driver U6 frequency of oscillation control terminal RT, other end connection
To common reference.Electric capacity C8 positive poles are connected to LED driver U6 control voltage output end VDD and linear current control terminal
LD, negative pole are with being connected to common reference.LED driver U6 enabled control terminal PWM_D inputs for the PWM brightness regulated signals
End.
LED adjusts driver element and receives brightness control signal by single-chip microcomputer adjustment module and control brightness, such as Figure 11 institutes
To show, its method is,
Step 1, initialization, it is original intensity to control LED；
Step 2, judge whether there is brightness control signal on single live wire；There is no brightness control signal, return to step two；There is brightness
Control signal, go to step 3；
Step 3, brightness control signal is received, determines brightness degree；
Step 4, change LED brightness, return to step two.
Original intensity could be arranged to any one in 9 grades of different brightness, for example, being arranged to brightness 1.
Judge whether there is brightness control signal on single live wire, method is to judge whether there is brightness control signal on single live wire
Guide waveform.Under normal circumstances, the voltage waveform of live wire input AC1 inputs is continuous whole single-phase sine wave, bears half-wave
The waveform of rectification shaping circuit output is cycle 20ms, the nearly 10ms of pulse width square wave.Wall control switch element is sent once
During brightness control signal, its guiding waveform causes the missing of a negative half-wave, such as Fig. 5 (c) and the correspondence position of Fig. 5 (b) pulses 1
Negative half-wave pulse missing, as the negative half-wave pulse of Fig. 6 (c) and the correspondence position of Fig. 6 (b) pulses 7 lacks.Single-chip microcomputer adjustment module is sentenced
The waveform for negative halfwave rectifier shaping circuit output that breaks has negative half-wave pulse to lack, and ensuing positive half-wave rectification shaping circuit
The positive half-wave waveform of output is complete, and corresponding positive half-wave pulse is the pulse 2 in Fig. 5, or the pulse 8 in Fig. 6, you can judge
Go out on single live wire to have the guiding waveform of brightness control signal.
The reception brightness control signal, determines brightness degree, and method is to judge that phase shifting angle is the single-phase of α in data waveform
The number of half-sinusoid；There is the single-phase half-sinusoid that continuous K phase shifting angle is α, the brightness degree of brightness control signal is brightness
K.The brightness control signal of negative halfwave rectifier shaping circuit output bears voltage waveform such as Fig. 5 (c) and Fig. 6 after halfwave rectifier shaping
(c) shown in, and it is connected to regulation single-chip microcomputer；The brightness control signal positive half-wave rectification shaping of positive half-wave rectification shaping circuit output
Afterwards shown in voltage waveform such as Fig. 5 (d) and Fig. 6 (d), and it is connected to regulation single-chip microcomputer.Phase shifting angle is α single-phase half-sinusoid, its
Corresponding pulse width is 10ms-t, such as the pulse 3 in Fig. 5, pulse 4, pulse 5, or pulse 9, pulse 10 in Fig. 6；
After a brightness control signal has been sent, the voltage waveform of single fire wire output end AC1 output for it is continuous whole it is single-phase just
String ripple, brightness control signal bear halfwave rectifier shaping either brightness control signal positive half-wave rectification shaping, and pulse width is recovered
To 10ms square wave, such as the pulse 6 in Fig. 5, or the pulse 11 in Fig. 6.Regulation single-chip microcomputer connects after waveform is guided
The brightness control signal that receives bears after halfwave rectifier shaping voltage after voltage waveform and brightness control signal negative and positive ripple rectification shaping
In waveform, width be 180 ° of-α of angle either time 10ms-t pulse number be in data waveform phase shifting angle be α's
The number of single-phase half-sinusoid.Judge that brightness control signal bears voltage waveform and brightness control signal negative and positive after halfwave rectifier shaping
The width of pulse is 10ms or 10ms-t in voltage waveform after ripple rectification shaping, by pulse width closer to 10ms still
10ms-t judges.
Change LED brightness, by changing the PWM brightness regulations letter for being connected to LED driver U6 and enabling control terminal PWM_D
Number dutycycle realize.
In Fig. 1, wall control switch element is that single live wire AC enters, and single live wire AC1 goes out；LED regulation driver element live wire AC1
Enter, zero line N goes out.From the point of view of anti-interference, the live wire AC in Fig. 1 and zero line N positions are exchanged, the method for the invention is still
So effectively, and antijamming capability is stronger.
The method of the invention has following features：
1. the brightness control signal of control LED is sent using single live wire mode, without remote control, without control line, without
Again power line is laid；
2. LED brightness regulation is divided into 9 grades, adjusted using knob assembly, meet operating habit；
3. the brightness control signal on single live wire is only to be sent in short-term when changing brightness, LED is in illuminating state
And when not sending brightness control signal, the voltage waveform of single fire wire output end output is continuous whole single-phase sine wave, is not had
Harmonic wave；
4. with function of turning off the light.
Claims (10)
1. a kind of wall control that LED brightness control signal is sent by single live wire switchs, defeated provided with single live wire input, single live wire
Go out end；Single live wire input is connected to AC power live wire；The AC power is single-phase 220V alternating currents；Its feature exists
In：
Wall control switch is by single fire-wire power module, single chip control module, phase shift drive module, zero passage detection module, bright
The given module composition of degree, brightness control signal is sent by the voltage waveform for controlling single fire wire output end to export.
2. the wall control according to claim 1 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：The wall control switchs is to send the method for brightness control signal by the voltage waveform for controlling single fire wire output end to export,
Step A, judge whether to close LED, be to close LED, go to step C；Otherwise step B is gone to；
Step B, send a brightness control signal；
Step C, judges whether the brightness degree of brightness control signal changes；Brightness degree changes, return to step A；
Brightness degree does not change, and maintenance does not send brightness control signal state, return to step C；
The maintenance does not send brightness control signal state, and when LED is in closed mode, single fire wire output end flows through micro- electricity
Stream；The maintenance does not send brightness control signal state, when LED is in illuminating state, the electricity of single fire wire output end output
Corrugating is continuous whole single-phase sine wave；
It is described to send a brightness control signal, including guiding waveform is sent, then and then send data waveform；
The guiding waveform is made up of a negative half-wave being not turned on, immediately a positive half-wave completely turned on；The guide wave
Shape can also be by a complete cycle being not turned on, an immediately positive half-wave composition completely turned on；
The data waveform is all made up of continuous K phase shifting angle for α single-phase half-sinusoid, its brightness control signal sent
Brightness degree is brightness K, and K is more than or equal to the 1, integer less than or equal to 9.
3. the wall control according to claim 2 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：Described to send guiding waveform, method is that single chip control module stops trigger signal output at random, waits zero passage detection mould
The zero cross signal of block output；A trigger pulse for being no more than 10ms is sent in the falling edge of zero cross signal.
4. the wall control according to claim 3 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：The zero cross signal produces after single chip control module stops trigger signal output at random, is to bear half-wave with AC power
Positive pulse of the corresponding and width close to 10ms.
5. the wall control according to claim 2 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：Described to send data waveform, method is, in the phase shifting angle α triggering moments of each single-phase half-sinusoid of data waveform, single-chip microcomputer
Control module sends a narrow trigger pulse.
6. the wall control according to claim 5 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：The phase shifting angle α triggering moments of each single-phase half-sinusoid of the data waveform, are to be used as timing using the trailing edge of zero cross signal
Starting point, the timing that is delayed successively obtain.
7. the wall control according to claim 2 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：When the LED is in closed mode, single chip control module stops output trigger signal.
8. the wall control according to claim 2 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：Phase shifting angle α=30 °.
9. the wall control according to claim 1 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：Single fire-wire power module has single live wire OFF state current-taking function and ON state current-taking function, is provided for being switched to wall control
Working power；
The zero passage detection module is halfwave rectifier bleeder circuit, can detect the zero cross signal of the AC power, and provide
To single chip control module；
The brightness, which gives module, can provide the brightness degree of brightness control signal to single chip control module；
The phase shift drive module is that bidirectional thyristor exchanges phase-shift circuit；
Brightness degree of the single chip control module according to brightness control signal, send trigger signal control phase shift drive module
Send brightness control signal.
10. the wall control according to claim 1 that LED brightness control signal is sent by single live wire switchs, its feature exists
In：Single fire-wire power module by single live wire voltage-stablizer and diode D1, electric capacity C1, electric capacity C2, inductance L1, inductance L2, with
And low-dropout regulator and electric capacity C3, electric capacity C4 composition；
Single live wire input is the simulation of wall control switch, is connected to the alternating voltage common port COM of single live wire voltage-stablizer；Electric capacity
C1 both ends are respectively connecting to the filter capacitor input FIL and alternating voltage common port COM of single live wire voltage-stablizer；Single live wire is steady
The VD of depressor GND ends be that wall control switchs digitally, inductance L2 both ends are respectively connecting to wall control switch
Digitally with simulation；Diode D1, inductance L1 and electric capacity C2 composition halfwave rectifier filter circuits, halfwave rectifier filter circuit
Input is connected to single fire wire output end, output is connected to the high direct voltage input HDC of single live wire voltage-stablizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710790926.9A CN107517520A (en) | 2015-05-08 | 2015-05-08 | A kind of wall control that LED brightness control signal is sent by single live wire switchs |
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|---|---|---|---|
| CN201710790926.9A CN107517520A (en) | 2015-05-08 | 2015-05-08 | A kind of wall control that LED brightness control signal is sent by single live wire switchs |
| CN201510229126.0A CN104837249A (en) | 2015-05-08 | 2015-05-08 | Low-harmonic dimming method of wall-controlled LED lamp |
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| CN201510229126.0A Division CN104837249A (en) | 2015-05-08 | 2015-05-08 | Low-harmonic dimming method of wall-controlled LED lamp |
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| CN201710790926.9A Pending CN107517520A (en) | 2015-05-08 | 2015-05-08 | A kind of wall control that LED brightness control signal is sent by single live wire switchs |
| CN201810591943.4A Active CN108990201B (en) | 2015-05-08 | 2015-05-08 | Wall-control LED lamp low-harmonic dimming method |
| CN201510229126.0A Pending CN104837249A (en) | 2015-05-08 | 2015-05-08 | Low-harmonic dimming method of wall-controlled LED lamp |
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| CN201510229126.0A Pending CN104837249A (en) | 2015-05-08 | 2015-05-08 | Low-harmonic dimming method of wall-controlled LED lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109246886A (en) * | 2018-09-11 | 2019-01-18 | 浙江凯耀照明股份有限公司 | A kind of intelligence TRIAC light modulator |
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| CN106033957B (en) * | 2016-06-15 | 2019-01-04 | 湖南工业大学 | The single firewire switch mostly controlled |
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| CN106033958B (en) * | 2016-06-15 | 2019-03-01 | 湖南工业大学 | The single firewire switch mostly jointly controlled |
| CN106033959B (en) * | 2016-06-15 | 2019-01-04 | 湖南工业大学 | Single firewire switch of more ground self-resetting switch control |
| CN106027005B (en) * | 2016-06-15 | 2019-01-04 | 湖南工业大学 | Single firewire switch |
| CN106100629B (en) * | 2016-06-15 | 2019-01-04 | 湖南工业大学 | Single firewire soft-touch control |
| US10375796B2 (en) | 2017-04-25 | 2019-08-06 | Current Lighting Solutions, Llc | Waveform shaping circuit for spurious harmonic suppression |
| CN108366467A (en) * | 2018-05-08 | 2018-08-03 | 浙江摩根智能技术有限公司 | Single firewire signal light adjusting circuit |
| CN110133359B (en) * | 2019-05-23 | 2021-08-13 | 广东美的制冷设备有限公司 | Air conditioner zero-crossing detection circuit, electric control device and air conditioner |
| CN111194132B (en) * | 2020-02-12 | 2022-02-15 | 西安奇妙电子科技有限公司 | Single live wire power-taking circuit and single live wire switch |
| CN112466110B (en) * | 2020-10-29 | 2024-02-23 | 欧普照明电器（中山）有限公司 | Equipment control system and equipment control method |
| CN112770461B (en) * | 2020-12-25 | 2023-04-25 | 漳州立达信光电子科技有限公司 | Dimming circuit and dimming equipment |
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| CN108990201A (en) | 2018-12-11 |
| CN108990201B (en) | 2020-11-27 |
| CN104837249A (en) | 2015-08-12 |
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