CN104837252B - Method for controlling brightness of LED lamp through single live wire - Google Patents
Method for controlling brightness of LED lamp through single live wire Download PDFInfo
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- CN104837252B CN104837252B CN201510229176.9A CN201510229176A CN104837252B CN 104837252 B CN104837252 B CN 104837252B CN 201510229176 A CN201510229176 A CN 201510229176A CN 104837252 B CN104837252 B CN 104837252B
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Abstract
The invention provides a method for controlling the brightness of an LED lamp through a single live wire, wherein dimming is realized by an LED lamp single-live-wire dimming circuit which is composed of a brightness wall-controlling unit and a brightness adjustment driving unit. When brightness adjustment is required, the brightness wall-controlling unit controls and changes the phase shift angle of a voltage waveform which is output from the single live wire for transmitting a brightness control signal, and the brightness adjustment driving unit changes the brightness of the LED lamp according to the brightness grade in the brightness control signal. When the brightness wall-controlling unit transmits the brightness control signal, the output end of the single live wire outputs a guiding wave which is composed of a plurality of same phase shift angle half-waves, and a data wave which is composed of a plurality of continuous single-phase sinusoidal half-waves with different phase shift angles. Hex number system data which correspond with the data wave represents a brightness grade. The LED lamp dimming method can be used for replacement and upgrade of a common illuminating lamp which is controlled by the single live wire.
Description
Technical field
The present invention relates to a kind of lighting technology, a kind of method that especially single live wire controls LED brightness.
Background technology
Due to the nonlinear characteristic of LED, the brightness of LED can not be realized using adjusting by the way of voltage.
When the brightness of LED is adjusted using controllable constant-current source, the change of operating current can bring the chromatograph of LED inclined
Move, meanwhile, LED load current also becomes very low under low-light level, increases can the reduction of controllable constant-current source efficiency and temperature rise, is lost
Power consumption on driving chip is bigger, so as to damage the life-span of constant-current source and LED light source.
Using PWM（Pulsewidth modulation）Dimming mode controls LED brightness, can avoid voltage regulating mode and adjust current system band
The problem come.At present conventional LED light-dimming method has three kinds：
One is to adopt remote control control.LED control circuit is equipped with remote control device, can pass through remote control pair
LED has carried out level light modulation or stepless dimming, and it has the disadvantage that a LED needs to be equipped with a remote control, causes remote control
Device quantity is more, and management trouble, cost is also higher.
Two is to adopt digital control technology.For example, using DALI（The lighting interface of digital address）Technology, DALI systems
Software same forceful electric power loop or the single or multiple LED lamps on different circuit can be carried out it is separately addressed, by DALI systems
Software is accurately dimmed and on-off control to single lamp or arbitrary lamp group.Program advanced technology, but cost is very high, system
In addition to needing to lay electric lines of force, in addition it is also necessary to lay control line.
Three is using single live wire switch on and off control technology.For example, using NU102 special chips, you can using common wall
Face switchs the switch motion within the time of regulation, realizes the brightness regulation of LED.But the method can only provide 4 grades of LEDs
Brightness is adjusted, and switch motion has time requirement.
The content of the invention
The purpose of the present invention aims to provide one kind in the case where existing illuminating line wiring is not changed, using single live wire pair
The method that LED is dimmed.
To reach above-mentioned purpose, the inventive method is realized by LED list live wire light adjusting circuit.
The LED list live wire light adjusting circuit is made up of brightness wall control unit, brightness regulation driver element；The brightness wall
Control unit is provided with single live wire input, single fire wire output end, and single live wire input is connected to alternating current power supply live wire；It is described bright
Degree adjusts driver element and is provided with live wire input, zero line input, wherein, the live wire input is connected to brightness wall control unit
Single fire wire output end, the zero line input is connected to alternating current power supply zero line；The alternating current power supply is single-phase 220V alternating currents.
The brightness wall control unit sends brightness control by the phase shifting angle of the single fire wire output end output voltage waveforms of control
Signal processed, brightness control signal is by guide wave and data wave component.
It is described send brightness control signal method be：
Step A, sets the brightness degree of brightness control signal as brightness 1；
Step B, sends a brightness control signal；
Step C, judges whether brightness changes, and brightness changes, return to step B；Brightness does not change, dimension
Hold and do not send brightness control signal state, return to step C.
The maintenance does not send brightness control signal state, and single fire wire output end exports positive and negative half-wave phase shifting angle all for α's
Single-phase half-sinusoid.
The guide wave is continuousyIndividual phase shifting angle is the single-phase half-sinusoid of β,yIt is the integer more than or equal to 1；The number
It is according to ripplexIndividual phase shifting angle can be individually for the single-phase half-sinusoid of α or β,xIt is the integer more than or equal to 2.
The total brightness 1- of the brightness control signalN, altogetherNIndividual brightness degree；NIt is more than or equal to 2, less than or equal to 2 x 's
Integer.NRepresentative value be 8.
The phase shift angle beta is more than phase shifting angle α；Phase shifting angle α=4 °, phase shift angle beta=30 °.
The brightness regulation driver element receives brightness control signal by luminance signal receiver module and to adjust LED bright
Spend, its method is：
Step one, sets the brightness degree of brightness control signal as brightness 1；
Step 2, adjusts LED luminance；
Step 3, judges whether there is brightness control signal on single live wire；Without brightness control signal, return to step three；Have
Brightness control signal, goes to step 4；
Step 4, receives brightness control signal, determines brightness degree；
Step 5, return to step two.
Described to judge whether there is brightness control signal on single live wire, method is to judge whether live wire input has guide wave；
The reception brightness control signal, method is to receive guide wave and data wave successively；The determination brightness degree, is to receive
Data wave is converted toxPosition binary system brightness code, then byxPosition binary system brightness code obtains brightness degree.
Phase shifting angle takes phase shift sampling pulse triggering mode for the single-phase half-sinusoid of β in the guide wave and data wave；
Phase shifting angle takes triggering mode in advance for the single-phase half-sinusoid of α in the data wave；Single fire wire output end output is positive and negative
Half-wave phase shifting angle all takes uninterrupted triggering mode for the single-phase half-sinusoid of α.
Described to take triggering mode in advance, before zero crossing, finish time is in zero passage for the initial time of its trigger pulse
After α angles after point.
Described to take phase shift sampling pulse triggering mode, the initial time of its trigger pulse is after phase shift sampling pulse.
The brightness wall control unit is by single fire-wire power module, rectification phase shift drive module, waveform sampling Shaping Module, list
Piece machine control module, trigger control module, the given module composition of brightness.
The single chip control module is wall control single-chip minimum system, is taken with brightness Setting signal input, phase shift
Sample pulse input end, trigger outfan.
The rectification phase shift drive module is that unidirectional thyristor exchanges phase switcher circuit, by unidirectional thyristor and single-phase bridge
Formula rectification circuit is constituted；2 ac input ends of single phase bridge type rectifier circu are respectively single live wire input, single live wire output
End；The rectification output plus terminal of single phase bridge type rectifier circu is all wave rectification end, and rectification output negative terminal is for publicly；Unidirectional thyristor
Anode, negative electrode be respectively connecting to all wave rectification end, publicly.
Single fire-wire power module is DC/DC mu balanced circuits, and input is connected to all wave rectification end, and outfan output is single
Live wire control power supply is powered to single chip control module；The DC/DC mu balanced circuits have the control source characteristic of wide scope.
The waveform sampling Shaping Module is resistor voltage divider circuit, and input is connected to all wave rectification end, outfan output
Phase shift sampling pulse；Phase shift sampling pulse is by stabilivolt amplitude limit and is connected to single chip control module.
The given module output brightness Setting signal of the brightness delivers to single chip control module.
The trigger input of the trigger control module is connected to single chip control module, and outfan is connected to unidirectionally
Thyristor control pole.
The brightness regulation driver element is driven by single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness
Module is constituted.
The single-phase rectifier power module of voltage regulation is made up of single-phase transformer, single-phase rectifier bridge circuit, filter regulator circuit；
Single-phase transformer input is connected to live wire input, zero line input；Single-phase transformer outfan is connected to single-phase rectification bridge
Circuit AC input；Single-phase rectification bridge circuit rectifies output plus terminal is DC supply, negative terminal is reference ground；Filtering voltage regulation
Circuit input end is connected to DC supply；The output of filter regulator circuit outfan adjusts DC source and receives to luminance signal
Module for power supply.
The luminance signal receiver module is constituted by single-chip minimum system, luminance signal sampling shaping circuit is adjusted.
The regulation single-chip minimum system is provided with pulse capture input and pwm pulse outfan.
The luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, stabilivolt amplitude limiter circuit；All wave rectification electricity
Road input is connected to single-phase transformer outfan；Stabilivolt amplitude limiter circuit input be connected to full-wave rectifying circuit outfan,
Outfan is connected to the pulse capture input for adjusting single-chip minimum system.
The LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal inputs；LED drives
The direct-flow input end of dynamic model block is connected to DC supply, and PWM brightness regulated signal inputs are connected to regulation single-chip microcomputer most
The pwm pulse outfan of mini system, LED drive end is connected to LED.
The invention has the beneficial effects as follows, LED brightness is controlled using single live wire mode, without the need for remote control, without the need for control line,
Without laying power line again, it is possible to achieve the replacement upgrading of general lighting lamp；LED brightness can be divided into as needed appoints
Meaning grade；Brightness control signal is only sent when brightness is changed using low-angle phase shift system, is exported by finite number amount
The brightness control signal of half-sinusoid composition, the time is short, does not result in LED flicker.
Description of the drawings
Fig. 1 is system architecture diagram.
Fig. 2 is brightness wall control cellular construction figure.
Fig. 3 is brightness wall control unit embodiment circuit diagram.
Fig. 4 is waveform example when brightness wall control unit maintains not sending brightness control signal state.
Fig. 5 is waveform example when brightness wall control unit sends brightness control signal.
Fig. 6 is to send brightness control signal flow chart.
Fig. 7 is brightness control signal sending control method.
Fig. 8 is brightness regulation structure of driving unit figure.
Fig. 9 is brightness regulation drive unit embodiment.
Figure 10 is brightness control signal method of reseptance.
Specific embodiment
Below by accompanying drawing and in conjunction with the embodiments the present invention is described in further detail, but embodiments of the present invention
Not limited to this.
Realize a kind of LED list live wire light adjusting circuit example structure of the inventive method as shown in figure 1, by brightness wall control
Unit and brightness regulation driver element are composed in series.Brightness wall control unit list live wire L enters, and single live wire L1 goes out；Brightness regulation drives
Unit live wire L1 enters, and zero line N goes out.
The structure of brightness wall control unit by single fire-wire power module, rectification phase shift drive module, waveform as shown in Fig. 2 taken
Sample Shaping Module, single chip control module, trigger control module, the given module composition of brightness.
Brightness wall control unit embodiment circuit is as shown in Figure 3.
Rectification phase shift drive module be unidirectional thyristor exchange phase switcher circuit, by diode D01, diode D02, two
Pole pipe D03, diode D04, unidirectional thyristor V01 compositions.Diode D01, diode D02, diode D03, diode D04 groups
Into single phase bridge type rectifier circu, its 2 ac input ends are respectively single live wire input L, single fire wire output end L1.Single-phase bridge
The rectification output plus terminal of rectification circuit is all wave rectification end A, and rectification output negative terminal is for publicly.The anode of unidirectional thyristor V01,
Negative electrode is respectively connecting to all wave rectification end A, publicly.
Single fire-wire power module is DC/DC mu balanced circuits.In Fig. 3 embodiments, single fire-wire power module is by DC/DC manostat
U1, three terminal regulator U2, resistance R1, diode D1, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 compositions, DC/DC manostat U1
Model be DY10, the model of three terminal regulator U2 be HT7333.Electric capacity C1, resistance R1, electric capacity C2 composition π type filter circuits；π
The input of type filter circuit is connected to diode D1 negative electrodes, output and is connected to DC/DC manostat U1 inputs；Diode D1 anodes
It is connected to all wave rectification end A；Three terminal regulator U2 inputs are connected to DC/DC manostat U1 outfans, outfan for single live wire
Control power vd D；Electric capacity C3 is the output filter capacitor of DC/DC manostat U1, and electric capacity C4 is filtered for the output of three terminal regulator U2
Ripple electric capacity.
HT7333 exports+3.3V voltages.If the output voltage of DC/DC manostat U1 meets the confession of single chip control module
Electricity requires that three terminal regulator U2 can be omitted.DC/DC manostat U1 are also an option that other have the control source of wide scope special
The DC/DC manostat of property.
Waveform sampling Shaping Module is resistor voltage divider circuit.In Fig. 3 embodiments, waveform sampling Shaping Module by resistance R01,
Resistance R02, stabilivolt DW01 are constituted.Resistance R01, resistance R02 series connection tie-point is outfan, exports phase shift sampling pulse；Electricity
The other end of resistance R01 is input, is connected to all wave rectification end A.Stabilivolt DW01 is connected in parallel on resistance R02 two ends, to phase shift
Sampling pulse carries out amplitude limit.
In Fig. 3 embodiments, trigger control module is by audion V1, stabilivolt DW1, resistance R2, resistance R3, resistance R4, electricity
Resistance R5 compositions；Stabilivolt DW1 anodes are connected to after audion V1 collector series resistances R2, stabilivolt DW1 negative electrodes are connected to entirely
Ripple rectifier terminal A；Audion V1 emitter stage Jing resistance R3 are connected to publicly；Audion V1 base stages are respectively connecting to resistance R4, electricity
One end of resistance R5；The other end of resistance R4 is connected to publicly；Audion V1 transmittings extremely trigger outfan, is connected to
Unidirectional thyristor V01 control poles；The other end of resistance R5 is trigger input.
In Fig. 3 embodiments, the given module of brightness adopts pulse potential device WP.The common port COM connections of pulse potential device WP
To publicly.When pulse potential device WP rotates, its pulse output end SL, pulse output end SR output phases differ 90 ° of pulse.
Single chip control module is wall control single-chip minimum system.In Fig. 3 embodiments, wall control single-chip minimum system is by wall
Control single-chip microcomputer U3, crystal oscillator XT1 compositions, the model of wall control single-chip microcomputer U3 is MSP430G2553.In Fig. 3 embodiments, wall control
P2.0, P2.1 of single-chip microcomputer U3 is brightness Setting signal input, be respectively connecting to pulse potential device WP pulse output end SL,
Pulse output end SR；P2.2 is phase shift sampling pulse input, is connected to waveform sampling Shaping Module for resistor voltage divider circuit.Figure
In 3 embodiments, the phase shift sampling pulse outfan of waveform sampling Shaping Module；P1.1 is trigger outfan, is connected to tactile
Send out the trigger input of control module.
Brightness wall control unit sends brilliance control by the phase shifting angle of the single fire wire output end L1 output voltage waveforms of control
Signal.In brightness control signal, the single-phase half-sinusoid of brightness degree difference phase shifting angle represents the difference in carry counting system system
Symbol, the single-phase half-sinusoid composition data ripple of continuous multiple different phase shifting angles, carry counting system data corresponding with data wave
Represent brightness degree；The total brightness 1- of brightness control signalN, altogetherNIndividual brightness degree；NIt is the integer more than or equal to 2, representative value
For 8.
, only in rotary pulsed potentiometer WP, ability is by brightness wall control in the case of having brightness Setting signal for brightness control signal
Unit control sends.When brightness wall control unit maintains not sending brightness control signal state, between single chip control module is taken not
Disconnected triggering mode, continuously sends out trigger.The each key point waveform of brightness wall control unit is as shown in Figure 4.
During alternating current power supply zero passage, unidirectional thyristor V01 shut-offs.After alternating current power supply zero passage, although single chip control module is held
Supervention goes out continual trigger, but only when the voltage of all wave rectification end A is more than the voltage stabilizing value of stabilivolt DW1, audion
V1 is just turned on, and unidirectional thyristor V01 just can be triggered conducting.Therefore, the alternating voltage waveform of single fire wire output end L1 such as Fig. 4
（a）It is shown, each half-wave triggering and conducting at a phase shifting angle α.Voltage waveform such as Fig. 4 of all wave rectification end A（b）Institute
Show.The voltage waveform of all wave rectification end A is narrow potential pulse, and its pulse amplitude is determined by the voltage stabilizing value of stabilivolt DW1, its effect
It is to provide ON state supply voltage for single fire-wire power module.It is defeated because DC/DC manostat DY10 is when 12V DC voltages are input into
Going out voltage still can be in more than 5.8V, and the voltage stabilizing value of stabilivolt DW1 is more than 12V.When the voltage stabilizing value of stabilivolt DW1 takes 20V
When, phase shifting angle α=4 °.
Waveform example is as shown in Figure 5 when brightness wall control unit sends brightness control signal.What Fig. 5 sent is the bright of brightness 4
Degree control signal.Fig. 5（a）For the alternating voltage waveform of single fire wire output end L1 in transmission process, Fig. 5（b）For in transmission process
The voltage waveform of all wave rectification end A.Fig. 5（c）For the pulse schematic diagram of phase shift sampling pulse in transmission process, Fig. 5 is drawn（c）
When, pulse 9, pulse 10, pulse 11, pulse 12, pulse 13 have all been done idealization process, i.e. signal and have been made less than during high-level threshold
Low level process, makees high level process during higher than high-level threshold.
When needing to send a brightness control signal, single chip control module stops continuously sending out continual triggering letter
Number.Fig. 5（a）In, pulse 1 continuously sends out a pulse before continual trigger, the single-chip microcomputer control after pulse 1 for stopping
Molding block stops continuously sending out continual trigger, into controllable triggering state.Under controllable triggering state, Single-chip Controlling
The triggering mode of module has two kinds, and one kind is triggering mode in advance, and phase shifting angle is α；One kind is phase shift sampling pulse triggering side
Formula, phase shifting angle is β.
Fig. 5（a）In, pulse 2, pulse 3, pulse 4, pulse 5, pulse 6, the composition of pulse 7 send a brightness control signal
In the alternating voltage waveform of single fire wire output end L1, wherein, pulse 2, pulse 3, pulse 4 are the guide wave that 3 phase shifting angles are β,
Pulse 5, pulse 6, pulse 7 be phase shifting angle for α or β data wave.In data wave, phase shifting angle represents binary digit 0, phase shift for α
Angle represents binary digit 1 for β, and pulse 5, pulse 6, pulse 7 constitute 3 binary system brightness codes, and the scope of brightness code is 000-
111, the brightness degree scope of representative is brightness 1-8.Fig. 5（a）In, brightness code is 011, and the brightness degree of representative is brightness 4.
The number of data wave can also be the other values more than or equal to 2 outside 3, for example, when the number of data wave is 4, can constitute 4
Position binary system brightness code, the brightness degree scope maximum of representative can be 16 grades, i.e. brightness 1-16.The number of data wave isx
When, the brightness degree scope maximum of representative can reach 2 x Level；xIt is the integer more than or equal to 2.The number of guide wave can also be
Other values outside 3y,yIt is the integer more than or equal to 1.
Brightness control signal is sent after terminating, and single chip control module starts to continuously send out continual triggering letter again
Number.Fig. 5（a）In, pulse 8 is the pulse for continuously sending out first phase shifting angle after continual trigger for α.
When taking phase shift sampling pulse triggering mode, the initial time of its trigger pulse is after phase shift sampling pulse.Move
Phase sampling pulse triggering mode principle is as follows：Single chip control module does not send the alternating current power supply zero crossing after trigger, single
To IGCT V01 shut-offs.After zero passage, even if reaching at phase shifting angle α, because without trigger, unidirectional thyristor V01 is still closed
Disconnected, the voltage of all wave rectification end A persistently rises.Resistance R01, the partial pressure of resistance R02 in reasonable selection waveform sampling Shaping Module
Than when making at arrival phase shift angle beta, the voltage of all wave rectification end A rises to makes phase shift sample-pulse signal sample point B after partial pressure
Phase shift sampling pulse becomes high level from low level.Single chip control module receives the phase shift sample-pulse signal of high level
Afterwards, trigger is sent, unidirectional thyristor V01 conductings, phase shift sampling pulse disappears, and is changed into low level, this phase shift sampling arteries and veins
Rush trigger process to terminate.Phase shift angle beta representative value is 30 °, if the high-level threshold of phase shift sampling pulse is 1.5V, then resistance R01
Value is 100 times of resistance R02.In Fig. 4, due to the voltage peak of all wave rectification end A it is little, Fig. 4（c）In without phase shift sample arteries and veins
Punching.
When needing to send a brightness control signal, single chip control module sends first the guide wave that phase shifting angle is β.
In the embodiment of Fig. 5,3 phase shifting angles take phase shift sampling pulse triggering mode for the guide wave of β.
In data wave, existing phase shifting angle is the data wave of α, also there is the data wave that phase shifting angle is β.Need to send phase shifting angle and be
During the data wave of β, phase shift sampling pulse triggering mode, single chip control module is also taken not to send out before alternating current power supply zero crossing
Go out trigger.When reaching at phase shift angle beta after zero passage, single chip control module receives the phase shift sample-pulse signal of high level
Afterwards, then trigger is sent.When needing to send the data wave that phase shifting angle is α, single chip control module takes triggering mode in advance,
Trigger was sent before alternating current power supply zero crossing, trigger lasts till alternating current power supply zero crossing again through phase shifting angle α
Terminate afterwards；The moment point of trigger is sent before alternating current power supply zero crossing, it is last according to the triggering for receiving by single-chip microcomputer
The phase shift sample-pulse signal moment of one guide wave calculates and obtains.
In data wave, phase shifting angle takes triggering mode in advance for the single-phase half-sinusoid of α, in advance the triggering arteries and veins of triggering mode
Initial time is rushed before zero crossing, after α angles of the finish time after zero passage.By taking Fig. 5 as an example, the shifting of the 1st data wave
Phase angle is α, and needs take triggering mode in advance, phase shift sample-pulse signal of the moment that it is triggered in last guide wave
（That is pulse 11）Afterwards, next time before alternating current power supply zero crossing；So that phase shift angle beta is for 30 ° of representative value as an example, that what is triggered in advance rises
Moment beginning can be converted into the time between 30 ° to 180 °, and the initial time for triggering in advance can be in last guide wave
Between 0 to 8.33ms after phase shift sample-pulse signal.For example, phase shift of the single chip control module in last guide wave
5ms after sample-pulse signal sends the trigger of a persistent period 5ms, or in the shifting of last guide wave
5ms after phase sample-pulse signal sends the trigger of a persistent period 6ms, or in last guide wave
7ms after phase shift sample-pulse signal sends trigger of a persistent period 3ms, etc., is satisfied by the 1st data wave
The requirement of triggering mode in advance.
It is α if not the phase shifting angle of the 1st data wave, the phase shifting angle for being other data waves below is α, then only need to
It is determined that the phase shifting angle for being which data wave is α.If the phase shifting angle of the 2nd data wave be α, its trigger in advance it is initial when
10ms is moved after the initial time for triggering in advance of 1 data wave of Ke Bi；If the phase shifting angle of the 3rd data wave is α, it is carried
The initial time of front triggering moves 20ms after the initial time for triggering in advance than the 1st data wave, and the rest may be inferred.For example, the 2nd
When the phase shifting angle of data wave is α, single chip control module is after the phase shift sample-pulse signal of last guide wave
15ms sends the trigger of a persistent period 5ms and meets the requirement that the 2nd data wave shifts to an earlier date triggering mode.
Single chip control module sends the flow process of a brightness control signal as shown in fig. 6, step is as follows：
Step 1, stopping continuously sends out continual trigger, exits maintenance and does not send brightness control signal state；
Step 2, sends guide wave；
Step 3, sends data wave；
Step 4, terminates brightness control signal and sends, and into maintenance brightness control signal state is not sent.
Brightness wall control unit send brightness control signal method as shown in fig. 7, comprises：
Step A, sets the brightness degree of brightness control signal as brightness 1；
Step B, sends a brightness control signal；
Step C, judges whether brightness changes, and brightness changes, return to step B；Brightness does not change, dimension
Hold and do not send brightness control signal state, return to step C.
The structure of brightness regulation drive unit embodiment is as shown in figure 8, by single-phase rectifier power module of voltage regulation, luminance signal
Receiver module, brightness drive module composition.
Single-phase rectifier power module of voltage regulation is made up of single-phase transformer, single-phase rectifier bridge circuit, filter regulator circuit；It is single-phase
Transformer inputs are connected to live wire input L1, zero line input N；Single-phase transformer outfan is connected to single-phase rectification bridge electricity
Road ac input end；Single-phase rectification bridge circuit rectifies output plus terminal is DC supply, negative terminal is reference ground；Filtering voltage regulation electricity
Road input is connected to DC supply；Filter regulator circuit output adjusts DC source, supplies to luminance signal receiver module
Electricity.
Luminance signal receiver module is constituted by single-chip minimum system, luminance signal sampling shaping circuit is adjusted, and adjusts single
Piece machine minimum system is provided with pulse capture input and pwm pulse outfan.
Luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, stabilivolt amplitude limiter circuit；Full-wave rectifying circuit is defeated
Enter end and be connected to single-phase transformer outfan.Stabilivolt amplitude limiter circuit input is connected to full-wave rectifying circuit outfan, output
End is connected to the pulse capture input of single-chip minimum system.
LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal inputs.LED drives mould
The direct-flow input end of block is connected to DC supply, and PWM brightness regulated signal inputs are connected to the PWM arteries and veins for adjusting single-chip microcomputer
Outfan is rushed, LED drive end is connected to LED.
Brightness regulation drive unit embodiment is as shown in Figure 9.
In embodiment illustrated in fig. 9, single-phase rectifier power module of voltage regulation is by single-phase transformer TC, diode D05, diode
D06, diode D07, diode D08, electric capacity C5, resistance R03, stabilivolt DW02 compositions.Wherein, diode D05, diode
D06, diode D07, diode D08 composition single-phase rectifier bridge circuits, electric capacity C5, resistance R03, stabilivolt DW02 composition filtering are steady
Volt circuit.Electric capacity C5 obtains DC supply VIN to single-phase rectification bridge output filtering, and output on stabilivolt DW02 adjusts direct current
Power supply VCC.
In embodiment illustrated in fig. 9, luminance signal receiver module is by adjusting single-chip microcomputer U4, crystal oscillator XT2, diode
D09, diode D10, resistance R6, resistance R7, stabilivolt DW2 compositions.Wherein, single-chip microcomputer U4, crystal oscillator XT2 composition is adjusted
Single-chip minimum system, the P2.0 for adjusting single-chip microcomputer U4 is pulse capture input, and P1.2 is pwm pulse outfan.Diode
D09, diode D10 constitute full-wave rectifying circuit, and diode D09, that the anode of diode D10 is respectively connecting to single-phase transformer is defeated
Go out and hold L2, N2, it is full-wave rectifying circuit outfan that negative electrode is coupled.Resistance R6, resistance R7, stabilivolt DW2 composition stabilivolt amplitude limits
Circuit.One end of resistance R6 is coupled for stabilivolt amplitude limiter circuit outfan with stabilivolt DW2 negative electrodes and is connected to regulation single-chip microcomputer
The pulse capture input of U4.The other end of resistance R6 is stabilivolt amplitude limiter circuit input and is connected to full-wave rectifying circuit
Outfan.Stabilivolt DW2 anodes are connected to reference ground, and resistance R7 is connected in parallel on the two ends of stabilivolt DW2.
The model for adjusting single-chip microcomputer U4 is MSP430G2553.Wall control single-chip microcomputer U3, regulation single-chip microcomputer U4 are also an option that it
The low-power scm of his MSP430 series.
In embodiment illustrated in fig. 9, brightness drive module by LED constant-current driver U5, inductance LG, resistance R8, recover two soon
Pole pipe D2 is constituted, model PT4115 of LED constant-current driver.The two ends of resistance R8 are respectively connecting to LED constant-current driver U5
Power voltage terminal VIN, output current induction end SEN；Fast recovery diode D2 negative electrodes are connected to the electricity of LED constant-current driver U5
Source voltage end VIN, anode are connected to the output switching terminal SW of LED constant-current driver U5；One end of inductance LG is connected to LED constant current
The output switching terminal SW of driver U5；Output current induction end SEN and inductance LG other ends of LED constant-current driver U5 be
LED drive end；The power voltage terminal VIN of LED constant-current driver U5 is the direct-flow input end of LED drive module；LED constant current is driven
The brightness adjustment control end DIM of dynamic device U5 is PWM brightness regulated signal inputs.
Brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module, its
Method is：
Step one, sets the brightness degree of brightness control signal as brightness 1；
Step 2, adjusts LED luminance；
Step 3, judges whether there is brightness control signal on single live wire；Without brightness control signal, return to step three；Have
Brightness control signal, goes to step 4；
Step 4, receives brightness control signal；
Step 5, return to step two.
Judge whether there is brightness control signal on single live wire, method is to judge whether live wire input L1 has phase shifting angle for β
Single-phase half-sinusoid；Brightness control signal is received, method is received after guide wave, then receiving data ripple.Guide wave is continuousy
Individual phase shifting angle is the single-phase half-sinusoid of β, and data wave isxIndividual phase shifting angle is the single-phase half-sinusoid of α or β.xIndividual phase shifting angle is α
Or the data wave of β can be converted toxPosition binary system brightness code, obtains the brightness degree of brightness control signal representative.
Alternating voltage on live wire input L1 is converted into square wave, such as Fig. 5 by luminance signal sampling shaping circuit（d）Institute
Show.Phase shifting angle α, phase shift angle beta and Fig. 5（d）Shown negative pulse correspondence, wherein phase shifting angle α respective pulses 14, pulse 18, pulse
21, it is the negative pulse of narrower width；Phase shift angle beta respective pulses 15, pulse 16, pulse 17, pulse 19, pulse 20 are width compared with
Wide negative pulse.Luminance signal receiver module only needs to differentiation and delivers to the negative arteries and veins of regulation single-chip minimum system pulse capture input
The width of punching, you can judge the α that the phase shifting angle of live wire input L1 is, or β.
In Fig. 5, single chip control module stops for the 1st time sending the positive half-wave of the moment in alternating current power supply of trigger, because
This, upper 1st phase shifting angle of live wire input L1 is negative half-wave for the single-phase half-sinusoid of β.Due to single chip control module the 1st time
The moment for stopping sending trigger is random, so, the moment that the 1st stopping sends trigger is likely in alternating current
The negative half-wave in source, now, upper 1st phase shifting angle of live wire input L1 is changed into positive half-wave for the single-phase half-sinusoid of β.Due to brightness
Sample of signal shaping circuit is reconverted into square wave to the alternating voltage elder generation rectification on live wire input L1, therefore, the 1st shifting
Phase angle is positive half-wave for the single-phase half-sinusoid of β, or negative half-wave, does not affect brightness regulation driver element to brightness control signal
Judgement with receive.
Claims (8)
1. a kind of method that single live wire controls LED brightness, is realized by LED list live wire light adjusting circuit, it is characterised in that：
The LED list live wire light adjusting circuit is made up of brightness wall control unit, brightness regulation driver element；The brightness wall control list
Unit is provided with single live wire input, single fire wire output end, and single live wire input is connected to alternating current power supply live wire；The brightness is adjusted
Section driver element is provided with live wire input, zero line input, wherein, the live wire input is connected to the list of brightness wall control unit
Fire wire output end, the zero line input is connected to alternating current power supply zero line；The alternating current power supply is single-phase 220V alternating currents；
The brightness wall control unit sends brilliance control letter by the phase shifting angle of the single fire wire output end output voltage waveforms of control
Number, brightness control signal is by guide wave and data wave component；
It is described send brightness control signal method be：
Step A, sets the brightness degree of brightness control signal as brightness 1；
Step B, sends a brightness control signal；
Step C, judges whether brightness changes, and brightness changes, return to step B；Brightness does not change, and maintains not
Send brightness control signal state, return to step C；
The maintenance does not send brightness control signal state, and it is all the single-phase of α that single fire wire output end exports positive and negative half-wave phase shifting angle
Half-sinusoid；
The guide wave is continuousyIndividual phase shifting angle is the single-phase half-sinusoid of β,yIt is the integer more than or equal to 1；The data wave
ForxIndividual phase shifting angle can be individually for the single-phase half-sinusoid of α or β,xIt is the integer more than or equal to 2；
The total brightness 1- of the brightness control signalN, altogetherNIndividual brightness degree；NIt is more than or equal to 2, less than or equal to 2 x Integer；
The phase shift angle beta is more than phase shifting angle α；
The brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module, its
Method is：
Step one, sets the brightness degree of brightness control signal as brightness 1；
Step 2, adjusts LED luminance；
Step 3, judges whether there is brightness control signal on single live wire；Without brightness control signal, return to step three；There is brightness
Control signal, goes to step 4；
Step 4, receives brightness control signal, determines brightness degree；
Step 5, return to step two；
Described to judge whether there is brightness control signal on single live wire, method is to judge whether live wire input has guide wave；It is described
Brightness control signal is received, method is to receive guide wave and data wave successively；The determination brightness degree, is the data that will be received
Ripple is converted toxPosition binary system brightness code, then byxPosition binary system brightness code obtains brightness degree.
2. the method that single live wire according to claim 1 controls LED brightness, it is characterised in that：The guide wave sum
Phase shift sampling pulse triggering mode is taken according to single-phase half-sinusoid of the phase shifting angle in ripple for β；Phase shifting angle is α's in the data wave
Single-phase half-sinusoid takes triggering mode in advance；The single fire wire output end export positive and negative half-wave phase shifting angle all for α it is single-phase just
String half-wave takes uninterrupted triggering mode.
3. the method that single live wire according to claim 2 controls LED brightness, it is characterised in that：Described taking is touched in advance
Originating party formula, the initial time of its trigger pulse before zero crossing, after α angles of the finish time after zero crossing.
4. the method that single live wire according to claim 2 controls LED brightness, it is characterised in that：It is described to take phase shift to take
Sample pulse-triggered mode, the initial time of its trigger pulse is after phase shift sampling pulse.
5. the method that single live wire according to claim 1 controls LED brightness, it is characterised in that：Phase shifting angle α=4 °
, phase shift angle beta=30 °.
6. the method that single live wire according to claim 1 controls LED brightness, it is characterised in that：It is describedN =8 。
7. the method that single live wire according to claim 1 controls LED brightness, it is characterised in that：The brightness wall control list
Unit is by single fire-wire power module, rectification phase shift drive module, waveform sampling Shaping Module, single chip control module, triggering control
Module, the given module composition of brightness；
The single chip control module is wall control single-chip minimum system, with brightness Setting signal input, phase shift sampling arteries and veins
Rush input, trigger outfan；
The rectification phase shift drive module is that unidirectional thyristor exchanges phase switcher circuit, whole by unidirectional thyristor and single-phase bridge
Current circuit is constituted；2 ac input ends of single phase bridge type rectifier circu are respectively single live wire input, single fire wire output end；It is single
The rectification output plus terminal of phase bridge rectifier is all wave rectification end, and rectification output negative terminal is for publicly；The sun of unidirectional thyristor
Pole, negative electrode are respectively connecting to all wave rectification end, publicly；
Single fire-wire power module is DC/DC mu balanced circuits, and input is connected to all wave rectification end, the single live wire of outfan output
Control power supply is powered to single chip control module；The DC/DC mu balanced circuits have the control source characteristic of wide scope；
The waveform sampling Shaping Module is resistor voltage divider circuit, and input is connected to all wave rectification end, outfan output phase shift
Sampling pulse；Phase shift sampling pulse is by stabilivolt amplitude limit and is connected to single chip control module；
The given module output brightness Setting signal of the brightness delivers to single chip control module；
The trigger input of the trigger control module is connected to single chip control module, and outfan is connected to unidirectional crystalline substance lock
Pipe control pole.
8. the method that single live wire according to claim 1 controls LED brightness, it is characterised in that：The brightness regulation is driven
Moving cell is made up of single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness drive module；
The single-phase rectifier power module of voltage regulation is made up of single-phase transformer, single-phase rectifier bridge circuit, filter regulator circuit；It is single-phase
Transformer inputs are connected to live wire input, zero line input；Single-phase transformer outfan is connected to single-phase rectifier bridge circuit
Ac input end；Single-phase rectification bridge circuit rectifies output plus terminal is DC supply, negative terminal is reference ground；Filter regulator circuit
Input is connected to DC supply；The output of filter regulator circuit outfan adjusts DC source to luminance signal receiver module
Power supply；
The luminance signal receiver module is constituted by single-chip minimum system, luminance signal sampling shaping circuit is adjusted；
The regulation single-chip minimum system is provided with pulse capture input and pwm pulse outfan；
The luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, stabilivolt amplitude limiter circuit；Full-wave rectifying circuit is defeated
Enter end and be connected to single-phase transformer outfan；Stabilivolt amplitude limiter circuit input is connected to full-wave rectifying circuit outfan, output
End is connected to the pulse capture input for adjusting single-chip minimum system；
The LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal inputs；LED drives mould
The direct-flow input end of block is connected to DC supply, and PWM brightness regulated signal inputs are connected to the minimum system of regulation single-chip microcomputer
The pwm pulse outfan of system, LED drive end is connected to LED.
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| CN201510229176.9A CN104837252B (en) | 2015-05-08 | 2015-05-08 | Method for controlling brightness of LED lamp through single live wire |
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| CN105611679B (en) * | 2016-03-18 | 2017-06-16 | 黎辉 | A kind of LED list live wire intelligent controlling device |
| CN107509268A (en) * | 2017-08-11 | 2017-12-22 | 浙江理工大学 | Non-pole light regulating intelligent LED desk lamp implementation method based on human body infrared sensing |
| CN113840420B (en) * | 2021-11-05 | 2024-01-30 | 深圳市星标电子科技有限公司 | Dimming and toning data transmission method and dimming and toning driving circuit |
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|---|---|---|---|---|
| CN101291560A (en) * | 2007-04-17 | 2008-10-22 | 李佳伟 | Light modulation control circuit applied to lighting control circuit of single wire |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
| CN103298221A (en) * | 2013-07-01 | 2013-09-11 | 湖南工业大学 | Dimming circuit and method of LED (Light Emitting Diode) lighting lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090187925A1 (en) * | 2008-01-17 | 2009-07-23 | Delta Electronic Inc. | Driver that efficiently regulates current in a plurality of LED strings |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291560A (en) * | 2007-04-17 | 2008-10-22 | 李佳伟 | Light modulation control circuit applied to lighting control circuit of single wire |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
| CN103298221A (en) * | 2013-07-01 | 2013-09-11 | 湖南工业大学 | Dimming circuit and method of LED (Light Emitting Diode) lighting lamp |
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