CN104837255B - Single-live-wire wall-controlled dimming method for LED lamp - Google Patents
Single-live-wire wall-controlled dimming method for LED lamp Download PDFInfo
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- CN104837255B CN104837255B CN201510229207.0A CN201510229207A CN104837255B CN 104837255 B CN104837255 B CN 104837255B CN 201510229207 A CN201510229207 A CN 201510229207A CN 104837255 B CN104837255 B CN 104837255B
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Abstract
In a single-live-wire dimming circuit for an LED lamp, a brightness wall controlling unit supplies electric power to a brightness adjustment driving unit in a single-live-wire manner. The brightness adjustment driving unit drives an LED lamp. The brightness wall controlling unit is composed of a single-live-wire power supply module, a rectifying phase-shift driving module, a waveform sampling and shaping module, a single-chip microcomputer control module, a triggering control module and a brightness setting module. The brightness adjustment driving unit is composed of a single-phase rectifying and voltage-stabilizing module, a brightness signal receiving module and a brightness driving module. When the brightness changes, the brightness wall controlling unit transmits a brightness controlling signal through controlling the phase shift angle of a voltage waveform which is outputted by the single live wire. The brightness adjustment driving unit changes the brightness of the LED lamp according to the brightness grade in the brightness controlling signal. The LED lamp dimming circuit can be used for replacement and upgrading of a common illuminating lamp which is controlled by the wall controlling switch.
Description
Technical field
The present invention relates to a kind of lighting technology, especially a kind of LED list live wire wall controlled dimming circuit.
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
LED carries out the circuit of wall controlled dimming.
To reach above-mentioned purpose, circuit of the present invention is adopted the technical scheme that：Driven by brightness wall control unit, brightness regulation
Unit is constituted, and 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；The brightness regulation driver element is provided with live wire input, zero line input, wherein, the live wire input
End is connected to single fire wire output end of brightness wall control unit, and the zero line input is connected to alternating current power supply zero line；The exchange
Power supply is single-phase 220V alternating currents.
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.
Single fire-wire power module is by DC/DC manostat, three terminal regulator, resistance R1, diode D1, electric capacity C1, electricity
Hold C2, electric capacity C3, electric capacity C4 compositions；Electric capacity C1, resistance R1, electric capacity C2 composition π type filter circuits；The input of π type filter circuits
It is connected to diode D1 negative electrodes, output and is connected to DC/DC manostat inputs；Diode D1 anodes are connected to all wave rectification end；
Three terminal regulator input is connected to DC/DC output end of voltage stabilizer, outfan for single live wire control power supply；Electric capacity C3 is DC/DC
The output filter capacitor of manostat, electric capacity C4 is the output filter capacitor of three terminal regulator.
The trigger control module is made up of audion V1, stabilivolt DW1, resistance R2, resistance R3, resistance R4, resistance R5；
Stabilivolt DW1 anodes are connected to after audion V1 collector series resistances R2, stabilivolt DW1 negative electrodes are connected to all wave rectification end；
Audion V1 emitter stage Jing resistance R3 are connected to publicly；Audion V1 base stages are respectively connecting to resistance R4, one end of resistance R5；
The other end of resistance R4 is connected to publicly；Audion V1 transmittings extremely trigger outfan, the other end of resistance R5
For trigger input.
The given module of the brightness adopts pulse potential device.
The stabilivolt amplitude limiter circuit is made up of resistance R6, resistance R7, stabilivolt DW2；One end of resistance R6 and stabilivolt
It is stabilivolt amplitude limiter circuit outfan that DW2 negative electrodes are coupled, and the other end of resistance R6 is stabilivolt amplitude limiter circuit input；Voltage stabilizing
Pipe DW2 anodes are connected to reference ground, and resistance R7 is connected in parallel on the two ends of stabilivolt DW2.
The brightness drive module is by LED constant-current driver PT4115, inductance LG, resistance R8, fast recovery diode D2 groups
Into；The two ends of resistance R8 are respectively connecting to the power voltage terminal VIN of LED constant-current driver PT4115, output current induction end
SEN；Fast recovery diode D2 negative electrodes are connected to the power voltage terminal VIN of LED constant-current driver PT4115, anode and are connected to LED
The output switching terminal SW of constant-flow driver PT4115；The switch that one end of inductance LG is connected to LED constant-current driver PT4115 is defeated
Go out to hold SW；Output current induction end SEN and inductance LG other ends of LED constant-current driver PT4115 is LED drive end；
The power voltage terminal VIN of LED constant-current driver PT4115 is the direct-flow input end of LED drive module；LED constant-current driver
The brightness adjustment control end DIM of PT4115 is PWM brightness regulated signal inputs.
The regulation single-chip minimum system is by adjusting single-chip microcomputer and its peripheral cell is constituted, control single chip computer minimum system
It is made up of control single chip computer and its peripheral cell；Adjust single-chip microcomputer and control single chip computer selects MSP430 series low-power consumption monolithics
Machine.
DC/DC manostat model DY10, three terminal regulator model HT7233.
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；In brightness control signal, brightness degree is represented with the quantity of the continuously single-phase half-sinusoid with specific phase shifting angle；
In brightness control signal, brightness degree can also represent the difference in carry counting system system with the single-phase half-sinusoid of different phase shifting angles
Symbol, the single-phase half-sinusoid composition data ripple of continuous difference phase shifting angle, carry counting system tables of data corresponding with data wave
Show brightness degree；Brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module.
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；Brightness, feel are adjusted using pulse potential device
Comfortably, adjust accurate；Single live wire control power supply adopts the DC/DC manostat of the control source characteristic with wide scope, it is easy to real
It is existing.
Description of the drawings
Fig. 1 is circuit system structure block 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.
A kind of system structure of LED list live wire wall controlled dimming circuit of the present invention as shown in figure 1, by brightness wall control unit and
Brightness regulation driver element is composed in series.Brightness wall control unit list live wire L enters, and single live wire L1 goes out；Brightness regulation driver element fire
Line 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 HT7233.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.
HT7233 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.
, 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, single chip control module continuously sends out
Continual trigger, 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 °.
Brightness wall control unit sends different brightness by the phase shifting angle of the single fire wire output end L1 output voltage waveforms of control
The brightness control signal of grade.In brightness control signal, the brightness degree continuously single-phase sine half with specific phase shifting angle
The quantity of ripple is represented；In brightness control signal, brightness degree can also represent carry with the single-phase half-sinusoid of different phase shifting angles
Distinct symbols in counting system, the single-phase half-sinusoid composition data ripple of continuous difference phase shifting angles, it is corresponding with data wave enter
Position counting system data represent brightness degree.
In the brightness control signal of embodiment, brightness degree is using the continuously single-phase half-sinusoid with specific phase shifting angle
Quantity represent, the total brightness 1- of brightness control signalN, altogetherNIndividual brightness degree；NIt is the integer more than or equal to 2, representative value is
8。
Waveform example is as shown in Figure 5 when brightness wall control unit sends brightness control signal.What Fig. 5 sent is that brightness degree is
The brightness control signal of brightness 3.
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 sends trigger；
Step 2, wait receives phase shift sampling pulse；
Step 3, sends trigger, waits phase shift sampling pulse to disappear；
Step 4, if brightness control signal has not sent, goes to step 1；Otherwise terminate the transmission of brightness control signal, enter
Enter and maintain not sending brightness control signal state.
After single chip control module stops sending trigger, next alternating current power supply zero crossing, unidirectional thyristor V01
Shut-off.After zero passage, even if reaching at phase shifting angle α, because without trigger, unidirectional thyristor V01 is still off, all wave rectification
The voltage of end A persistently rises.Resistance R01, the intrinsic standoff ratio of resistance R02, move arrival in reasonable selection waveform sampling Shaping Module
When at phase angle beta, the voltage of all wave rectification end A rises to makes the phase shift of phase shift sample-pulse signal sample point B after partial pressure sample arteries and veins
Punching becomes high level from low level.Single chip control module is received after the phase shift sample-pulse signal of high level, sends triggering
Signal, unidirectional thyristor V01 conductings, phase shift sampling pulse disappears, and is changed into low level.If brightness control signal is brightnessK, weight
Multiple process just nowKSecondary, brightness control signal is sent completely.Phase shift angle beta representative value is 30 °, if the height electricity of phase shift sampling pulse
Flat threshold value is 1.5V, then resistance R01 values are 100 times of resistance R02.Send a brightness control signal, single fire wire output end
L1 is continuousKIndividual half-wave output phase shifting angle is all the single-phase sine wave of β, and the brightness control signal for sending is brightnessK；K be more than etc.
In the 1, integer less than or equal to N.Phase shift angle beta is more than phase shifting angle α.In Fig. 4, due to the voltage peak of all wave rectification end A it is little, Fig. 4
（c）In there is no phase shift sampling pulse..
The brightness control signal sent shown in Fig. 5 is brightness 3, Fig. 5（a）For the friendship of single fire wire output end L1 in transmission process
Stream voltage waveform, Fig. 5（b）For the voltage waveform of all wave rectification end A in transmission process.Fig. 5（c）Sample for phase shift in transmission process
The pulse schematic diagram of pulse, draws Fig. 5（c）When, pulse 1, pulse 2, pulse 3 have all done idealization process, i.e. signal less than height
Make low level process during level threshold, high level process is made during higher than high-level threshold.
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 driver element by single-phase rectifier power module of voltage regulation, luminance signal as shown in figure 8, receive mould
Block, 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；Receive brightness control signal, method be judge continuous phase shifting angle for β single-phase half-sinusoid it is individual
Number, there is continuousKIndividual phase shifting angle is the single-phase half-sinusoid of β, and the brightness degree of brightness control signal is brightnessK.Luminance signal takes
Alternating voltage on live wire input L1 is converted into square wave, such as Fig. 5 by sample shaping circuit（d）It is shown.Phase shifting angle α, phase shift angle beta
With Fig. 5（d）Shown negative pulse correspondence, wherein phase shifting angle α respective pulses 4, pulse 8, pulse 9, is the negative pulse of narrower width；
Phase shift angle beta respective pulses 5, pulse 6, pulse 7, are the negative pulse of wider width.Luminance signal receiver module only needs to differentiation and send
To the width for adjusting single-chip minimum system pulse capture input negative pulse, you can judge whether live wire input L1 has phase shift
Angle is the single-phase half-sinusoid of β；Quantity of the phase shifting angle for the single-phase half-sinusoid of β is calculated, brightness control signal can be obtained.
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.
Circuit of the present invention has following features with method：
1. LED brightness is controlled using single live wire mode, without the need for remote control, without the need for control line, without laying electricity again
Source line；
2. LED brightness can as needed be divided into an arbitrarily grade；
3. the brightness control signal on single live wire is only to be sent in short-term when brightness is changed；
4. single live wire control power supply adopts the DC/DC manostat of the conventional control source characteristic with wide scope, it is easy to
Realize.
Claims (6)
1. a kind of LED list live wire wall controlled dimming circuit, is made up of brightness wall control unit, brightness regulation driver element, described bright
Degree 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；Institute
State brightness regulation driver element and be provided with live wire input, zero line input, wherein, the live wire input is connected to brightness wall control
Single fire wire output end of unit, the zero line input is connected to alternating current power supply zero line；The alternating current power supply is single-phase 220V friendships
Stream electricity；It is characterized in that：
The brightness wall control unit is by single fire-wire power module, rectification phase shift drive module, waveform sampling Shaping Module, single-chip microcomputer
Control module, trigger 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 is simultaneously connected to single chip control module；Phase shift sampling pulse is by stabilivolt amplitude limit；
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；
The brightness regulation driver element is by single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness drive module
Composition；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 input is connected to live wire input, zero line input；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；The output of filter regulator circuit outfan adjusts DC source and receives mould to luminance signal
Block is powered；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；
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；
In the brightness control signal, the brightness degree quantity table of the continuously single-phase half-sinusoid with specific phase shifting angle
Show；In brightness control signal, brightness degree can also be represented in carry counting system system with the single-phase half-sinusoid of different phase shifting angles
Distinct symbols, the single-phase half-sinusoid composition data ripple of continuous difference phase shifting angle, carry counting system number corresponding with data wave
According to expression brightness degree；Brightness regulation driver element receives brightness control signal and adjusts LED by luminance signal receiver module
Brightness.
2. LED list live wire wall controlled dimming circuit according to claim 1, it is characterised in that：Single fire-wire power mould
Block is made up of DC/DC manostat, three terminal regulator, resistance R1, diode D1, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4；Electricity
Hold C1, resistance R1, electric capacity C2 composition π type filter circuits；The input of π type filter circuits is connected to diode D1 negative electrodes, output and connects
It is connected to DC/DC manostat inputs；Diode D1 anodes are connected to all wave rectification end；Three terminal regulator input is connected to DC/
DC output end of voltage stabilizer, outfan are single live wire control power supply；Electric capacity C3 for DC/DC manostat output filter capacitor, electric capacity
C4 is the output filter capacitor of three terminal regulator.
3. LED list live wire wall controlled dimming circuit according to claim 1, it is characterised in that：The trigger control module
It is made up of audion V1, stabilivolt DW1, resistance R2, resistance R3, resistance R4, resistance R5；Audion V1 collector series resistances R2
After be connected to stabilivolt DW1 anodes, stabilivolt DW1 negative electrodes are connected to all wave rectification end；Audion V1 emitter stage Jing resistance R3 connects
It is connected to publicly；Audion V1 base stages are respectively connecting to resistance R4, one end of resistance R5；The other end of resistance R4 is connected to public affairs
Altogether；Audion V1 transmittings extremely trigger outfan, the other end of resistance R5 is trigger input.
4. LED list live wire wall controlled dimming circuit according to claim 1, it is characterised in that：The brightness gives module
Using pulse potential device.
5. LED list live wire wall controlled dimming circuit according to claim 1, it is characterised in that：The stabilivolt amplitude limit electricity
Routing resistance R6, resistance R7, stabilivolt DW2 compositions；One end of resistance R6 is coupled for stabilivolt amplitude limit electricity with stabilivolt DW2 negative electrodes
Road outfan, the other end of resistance R6 is stabilivolt amplitude limiter circuit input；Stabilivolt DW2 anodes are connected to reference ground, electricity
Resistance R7 is connected in parallel on the two ends of stabilivolt DW2.
6. LED list live wire wall controlled dimming circuit according to claim 1, it is characterised in that：The regulation single-chip microcomputer is most
, by single-chip microcomputer is adjusted and its peripheral cell is constituted, control single chip computer minimum system is by control single chip computer and its peripheral cell for mini system
Composition；Adjust single-chip microcomputer and control single chip computer selects MSP430 series low-power scms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229207.0A CN104837255B (en) | 2015-05-08 | 2015-05-08 | Single-live-wire wall-controlled dimming method for LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229207.0A CN104837255B (en) | 2015-05-08 | 2015-05-08 | Single-live-wire wall-controlled dimming method for LED lamp |
Publications (2)
| Publication Number | Publication Date |
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| CN104837255A CN104837255A (en) | 2015-08-12 |
| CN104837255B true CN104837255B (en) | 2017-05-17 |
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|---|---|---|---|
| CN201510229207.0A Expired - Fee Related CN104837255B (en) | 2015-05-08 | 2015-05-08 | Single-live-wire wall-controlled dimming method for LED lamp |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2099241A (en) * | 1980-12-10 | 1982-12-01 | Renham Ashley John | Electronic switch control circuit |
| TWM241878U (en) * | 2002-12-02 | 2004-08-21 | Prodigit Electronics Co Ltd | Single-wire digital AC power control circuit |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
| CN204578860U (en) * | 2015-05-08 | 2015-08-19 | 湖南工业大学 | A kind of LED list live wire wall controlled dimming circuit |
-
2015
- 2015-05-08 CN CN201510229207.0A patent/CN104837255B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2099241A (en) * | 1980-12-10 | 1982-12-01 | Renham Ashley John | Electronic switch control circuit |
| TWM241878U (en) * | 2002-12-02 | 2004-08-21 | Prodigit Electronics Co Ltd | Single-wire digital AC power control circuit |
| CN103281849A (en) * | 2013-06-26 | 2013-09-04 | 湖南工业大学 | Light-adjusting device and method of LED illuminating lamp |
| CN204578860U (en) * | 2015-05-08 | 2015-08-19 | 湖南工业大学 | A kind of LED list live wire wall controlled dimming circuit |
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| Publication number | Publication date |
|---|---|
| CN104837255A (en) | 2015-08-12 |
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