CN104837257A - Wall-controlled dimming method for LED lamp - Google Patents
Wall-controlled dimming method for LED lamp Download PDFInfo
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- CN104837257A CN104837257A CN201510229502.6A CN201510229502A CN104837257A CN 104837257 A CN104837257 A CN 104837257A CN 201510229502 A CN201510229502 A CN 201510229502A CN 104837257 A CN104837257 A CN 104837257A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
A wall-controlled dimming method for an LED lamp is dimmed 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 single-live-wire output voltage waveform for transmitting a brightness control signal. In the brightness control signal, a brightness grade is represented by the number of continuous single-phase sinusoidal half-waves with specific phase shift angles. 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 number of the half-waves which are continuously output from the single-live-wire output end and have the same phase shift angle is the brightness grade of the brightness control signal. The LED lamp dimming method can be used for replacement and upgrading 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, especially a kind of LED wall controlled dimming method.
Background technology
Due to the nonlinear characteristic of LED, the brightness of LED can not adopt the mode of regulation voltage to realize.
When adopting controllable constant-current source to regulate the brightness of LED, the change of operating current can bring the chromatogram of LED to offset, simultaneously, under low-light level, LED load current also becomes very low, the reduction of controllable constant-current source efficiency and temperature rise can be made to increase, the power consumption of loss on driving chip is larger, thus can damage the life-span of constant-current source and LED light source.
Adopt PWM(pulse-width modulation) brightness of dimming mode control LED, problem voltage regulating mode can avoided and adjust current system to bring.LED light-dimming method conventional at present has three kinds:
One is adopt remote controller to control.LED control circuit is equipped with remote control device, can have grade light modulation or stepless dimming by remote controller to LED, and its shortcoming is that a LED needs outfit remote controller, causes remote controller quantity many, and management trouble, cost is also higher.
Two is adopt digital control technology.Such as, adopt the lighting interface of DALI(digital address) technology, DALI systems soft ware can carry out independent addressing to the single or multiple LED lamp on same forceful electric power loop or different circuit, carries out accurate light modulation and switch control rule by DALI systems soft ware to single lamp or arbitrary lamp group.Program advanced technology, but cost is very high, and system, except power line laid by needs, also needs to lay control line.
Three is adopt single live wire switch on and off control technology.Such as, adopt NU102 special chip, the switch motion of common wall surface switch in official hour can be utilized, realize the brightness regulation of LED.But the method can only provide the adjustment brightness of 4 grades of LED, and the free requirement of switch motion.
Summary of the invention
Object of the present invention aims to provide a kind of when not changing the wiring of existing illuminating line, utilizes single live wire to carry out the method for wall controlled dimming to LED.
For achieving the above object, the inventive method is realized by LED list live wire light adjusting circuit.
Described LED list live wire light adjusting circuit is made up of brightness wall control unit, brightness regulation driver element; Described brightness wall control unit is provided with single live wire input, single fire wire output end, and described single live wire input is connected to AC power live wire; Described brightness regulation driver element is provided with live wire input, zero line input, and wherein, described live wire input is connected to single fire wire output end of brightness wall control unit, and described zero line input is connected to AC power zero line; Described AC power is single-phase 220V alternating current.
Described brightness wall control unit sends brightness control signal by the phase shifting angle controlling single fire wire output end output voltage waveforms, and brightness control signal has brightness 1-
n, altogether
nindividual brightness degree;
nfor being more than or equal to the integer of 2.
nrepresentative value be 8.
The method of described transmission brightness control signal is:
Steps A, the brightness degree of setting brightness control signal is brightness 1;
Step B, sends a brightness control signal;
Step C, judges whether brightness changes, and brightness changes, and returns step B; Brightness does not change, and maintains and does not send brightness control signal state, return step C.
Described maintenance does not send brightness control signal state, and single fire wire output end exports the single-phase half-sinusoid that positive and negative half-wave phase shifting angle is all α.
Describedly send a brightness control signal, single fire wire output end is continuous
kindividual half-wave exports the single-phase half-sinusoid that phase shifting angle is all β, and the brightness degree of the brightness control signal sent is brightness
k;
kfor being more than or equal to 1, being less than or equal to
ninteger.
Described phase shifting angle β is greater than phase shifting angle α.Described phase shifting angle α=4 °, phase shifting angle β=30 °.
Described brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module, and its method is:
Step one, the brightness degree of setting brightness control signal is brightness 1;
Step 2, regulates LED luminance;
Step 3, judges whether single live wire has brightness control signal; There is no brightness control signal, return step 3; There is brightness control signal, forward step 4 to;
Step 4, receives brightness control signal, determines brightness degree;
Step 5, returns step 2.
Describedly judge whether single live wire has brightness control signal, method is judge whether live wire input has phase shifting angle to be the single-phase half-sinusoid of β; Described reception brightness control signal, determines brightness degree, and method judges that continuous print phase shifting angle is the number of the single-phase half-sinusoid of β, has continuously
kindividual phase shifting angle is the single-phase half-sinusoid of β, and the brightness degree of brightness control signal is brightness
k.
Described phase shifting angle is that the single-phase half-sinusoid of β takes phase shift sampling pulse triggering mode; It is all that the single-phase half-sinusoid of α takes uninterrupted triggering mode that described single fire wire output end exports positive and negative half-wave phase shifting angle.
Describedly take phase shift sampling pulse triggering mode, the initial time of its trigger impulse is after phase shift sampling pulse.
Describedly take uninterrupted triggering mode, method is that triggering signal remains effective always.
Described brightness wall control unit is made up of single fire-wire power module, rectification phase shift driver module, waveform sampling Shaping Module, single chip control module, trigger control module, the given module of brightness.
Described single chip control module is wall control single-chip minimum system, has brightness Setting signal input, phase shift sampling pulse input, triggering signal output.
Described rectification phase shift driver module is that unidirectional thyristor exchanges phase switcher circuit, is made up of unidirectional thyristor and single phase bridge type rectifier circu; 2 ac input ends of single phase bridge type rectifier circu are respectively single live wire input, single fire wire output end; The rectification output plus terminal of single phase bridge type rectifier circu is full-wave rectification end, and it is publicly that rectification exports negative terminal; The anode of unidirectional thyristor, negative electrode are connected to full-wave rectification end, publicly respectively.
Described single fire-wire power module is DC/DC voltage stabilizing circuit, and input is connected to full-wave rectification end, and output exports single live wire control power supply and powers to single chip control module; Described DC/DC voltage stabilizing circuit has the voltage input characteristics of wide region.
Described waveform sampling Shaping Module is resistor voltage divider circuit, and input is connected to full-wave rectification end, and output exports phase shift sampling pulse; Phase shift sampling pulse is by voltage-stabiliser tube amplitude limit and be connected to single chip control module.
Described brightness given module output brightness Setting signal delivers to single chip control module.
The triggering signal input of described trigger control module is connected to single chip control module, and output is connected to unidirectional thyristor and controls pole.
Described brightness regulation driver element is made up of single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness driver module.
Described 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 output 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; Filter regulator circuit input is connected to DC supply; Filter regulator circuit output Drazin inverse DC power supply is powered to luminance signal receiver module.
Described luminance signal receiver module by regulating single-chip minimum system, luminance signal sampling shaping circuit forms.
Described adjustment single-chip minimum system is provided with pulse capture input and pwm pulse output.
Described luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, voltage-stabiliser tube amplitude limiter circuit; Full-wave rectifying circuit input is connected to single-phase transformer output; Voltage-stabiliser tube amplitude limiter circuit input is connected to full-wave rectifying circuit output, output is connected to the pulse capture input regulating single-chip minimum system.
Described LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal input; The direct-flow input end of LED drive module is connected to DC supply, and PWM brightness regulated signal input is connected to the pwm pulse output regulating single-chip minimum system, and LED drive end is connected to LED.
The invention has the beneficial effects as follows, adopt single live wire mode to control LED brightness, without the need to remote controller, without the need to control line, also again need not lay power line, the alternative upgrading of general lighting lamp can be realized; LED brightness can be divided into a grade arbitrarily as required; Brightness control signal only adopts low-angle phase shift system to send when changing brightness, the half-wave quantity exporting identical phase shifting angle is continuously the brightness degree of brightness control signal, and the time is short, and LED can not be caused to glimmer.
Accompanying drawing explanation
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 that brightness wall control unit maintains waveform example when not sending brightness control signal state.
Waveform example when Fig. 5 is brightness wall control unit transmission brightness control signal.
Fig. 6 sends 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.
Embodiment
Below by accompanying drawing, also the present invention is described in further detail in conjunction with the embodiments, but embodiments of the present invention are not limited thereto.
A kind of LED list live wire light adjusting circuit example structure realizing the inventive method as shown in Figure 1, is composed in series by brightness wall control unit and brightness regulation driver element.Brightness wall control unit list live wire L enters, and single live wire L1 goes out; Brightness regulation driver element live wire L1 enters, and zero line N goes out.
The structure of brightness wall control unit as shown in Figure 2, is made up of single fire-wire power module, rectification phase shift driver module, waveform sampling Shaping Module, single chip control module, trigger control module, the given module of brightness.
Brightness wall control unit embodiment circuit as shown in Figure 3.
Rectification phase shift driver module is that unidirectional thyristor exchanges phase switcher circuit, is made up of diode D01, diode D02, diode D03, diode D04, unidirectional thyristor V01.Diode D01, diode D02, diode D03, diode D04 form single phase bridge type rectifier circu, and its 2 ac input ends are respectively single live wire input L, single fire wire output end L1.The rectification output plus terminal of single phase bridge type rectifier circu is full-wave rectification end A, and it is publicly that rectification exports negative terminal.The anode of unidirectional thyristor V01, negative electrode are connected to full-wave rectification end A, publicly respectively.
Single fire-wire power module is DC/DC voltage stabilizing circuit.In Fig. 3 embodiment, single fire-wire power module is made up of DC/DC pressurizer U1, three terminal regulator U2, resistance R1, diode D1, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, and the model of DC/DC pressurizer U1 is DY10, the model of three terminal regulator U2 is HT7133.Electric capacity C1, resistance R1, electric capacity C2 form π type filter circuit; The input of π type filter circuit is connected to diode D1 negative electrode, output is connected to DC/DC pressurizer U1 input; Diode D1 anode is connected to full-wave rectification end A; Three terminal regulator U2 input is connected to DC/DC pressurizer U1 output, output is that single live wire controls power vd D; Electric capacity C3 is the output filter capacitor of DC/DC pressurizer U1, and electric capacity C4 is the output filter capacitor of three terminal regulator U2.
HT7133 exports+3.3V voltage.If the output voltage of DC/DC pressurizer U1 meets the power reguirements of single chip control module, three terminal regulator U2 can omit.DC/DC pressurizer U1 can also select other to have the DC/DC pressurizer of the voltage input characteristics of wide region.
Waveform sampling Shaping Module is resistor voltage divider circuit.In Fig. 3 embodiment, waveform sampling Shaping Module is made up of resistance R01, resistance R02, voltage-stabiliser tube DW01.Resistance R01, resistance R02 connect in series point are output, export phase shift sampling pulse; Other one end of resistance R01 is input, is connected to full-wave rectification end A.Voltage-stabiliser tube DW01 is connected in parallel on resistance R02 two ends, carries out amplitude limit to phase shift sampling pulse.
In Fig. 3 embodiment, trigger control module is made up of triode V1, voltage-stabiliser tube DW1, resistance R2, resistance R3, resistance R4, resistance R5; Be connected to voltage-stabiliser tube DW1 anode after triode V1 collector series resistance R2, voltage-stabiliser tube DW1 negative electrode is connected to full-wave rectification end A; Triode V1 emitter is connected to publicly through resistance R3; Triode V1 base stage is connected to one end of resistance R4, resistance R5 respectively; Other one end of resistance R4 is connected to publicly; Triode V1 launches very triggering signal output, is connected to unidirectional thyristor V01 and controls pole; Other one end of resistance R5 is triggering signal input.
In Fig. 3 embodiment, the given module of brightness adopts pulse potential device WP.The common port COM of pulse potential device WP is connected to publicly.When pulse potential device WP rotates, its pulse output end SL, pulse output end SR export the pulse of phase 90 °.
Single chip control module is wall control single-chip minimum system.In Fig. 3 embodiment, wall control single-chip minimum system is made up of wall control single-chip microcomputer U3, crystal oscillator XT1, and the model of wall control single-chip microcomputer U3 is MSP430G2553.In Fig. 3 embodiment, P2.0, P2.1 of wall control single-chip microcomputer U3 are brightness Setting signal inputs, are connected to the pulse output end SL of pulse potential device WP, pulse output end SR respectively; P2.2 is phase shift sampling pulse input, and being connected to waveform sampling Shaping Module is resistor voltage divider circuit.In Fig. 3 embodiment, the phase shift sampling pulse output of waveform sampling Shaping Module; P1.1 is triggering signal output, is connected to the triggering signal input of trigger control module.
Brightness wall control unit sends brightness control signal by the phase shifting angle controlling single fire wire output end L1 output voltage waveforms.In brightness control signal, the brightness degree quantity that continuous has the single-phase half-sinusoid of specific phase shifting angle represents; Brightness control signal has brightness 1-
n, altogether
nindividual brightness;
nfor being more than or equal to the integer of 2, representative value is 8.
Brightness control signal, only at rotary pulsed potentiometer WP, has when brightness Setting signal and is just sent by brightness wall control unit controls.When brightness wall control unit maintains and do not send brightness control signal state, take uninterrupted triggering mode, its triggering signal remains effective always, and namely single chip control module continues to send continual triggering signal, and each key point waveform of brightness wall control unit as shown in Figure 4.
During AC power zero passage, unidirectional thyristor V01 turns off.After AC power zero passage, although single chip control module continues to send continual triggering signal, only have the voltage as full-wave rectification end A to be greater than the voltage stabilizing value of voltage-stabiliser tube DW1, triode V1 just conducting, unidirectional thyristor V01 just can be triggered conducting.Therefore, as shown in Figure 4 (a), each half-wave is a phase shifting angle α place triggering and conducting for the alternating voltage waveform of single fire wire output end L1.The voltage waveform of full-wave rectification end A as shown in Figure 4 (b).The voltage waveform of full-wave rectification end A is narrow potential pulse, and its pulse amplitude is determined by the voltage stabilizing value of voltage-stabiliser tube DW1, and its effect is for single fire-wire power module provides ON state supply power voltage.Because DC/DC pressurizer DY10 is when 12V direct voltage inputs, output voltage still can at more than 5.8V, and the voltage stabilizing value of voltage-stabiliser tube DW1 is greater than 12V.When the voltage stabilizing value of voltage-stabiliser tube DW1 gets 20V, phase shifting angle α=4 °.
During brightness wall control unit transmission brightness control signal, waveform example as shown in Figure 5.What Fig. 5 sent is the brightness control signal of brightness 3.
Single chip control module sends the flow process of a brightness control signal as shown in Figure 6, and step is as follows:
Step 1, stops sending triggering signal;
Step 2, wait-receiving mode is to phase shift sampling pulse;
Step 3, sends triggering signal, waits for that phase shift sampling pulse disappears;
Step 4, if brightness control signal does not send, forwards step 1 to; Otherwise terminate the transmission of brightness control signal, enter maintenance and do not send brightness control signal state.
After single chip control module stops sending triggering signal, next AC power zero crossing, unidirectional thyristor V01 turns off.After zero passage, even if arrive phase shifting angle α place, because do not have triggering signal, unidirectional thyristor V01 still turns off, and the voltage keeps of full-wave rectification end A rises.The voltage ratio of resistance R01, resistance R02 in choose reasonable waveform sampling Shaping Module, when making arrival phase shifting angle β place, the voltage rise of full-wave rectification end A becomes high level to making the phase shift sampling pulse after dividing potential drop from low level.Single chip control module sends triggering signal after receiving the phase shift sample-pulse signal of high level, unidirectional thyristor V01 conducting, and phase shift sampling pulse disappears, and becomes low level.If brightness control signal is brightness
k, repeat process just now
ksecondary, brightness control signal is sent completely.Phase shifting angle β 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.Send a brightness control signal, single fire wire output end L1 is continuous
kindividual half-wave exports the single-phase half-sinusoid that phase shifting angle is all β, and the brightness control signal sent is brightness
k; K is the integer being more than or equal to 1, being less than or equal to N.Phase shifting angle β is greater than phase shifting angle α.
The brightness control signal sent shown in Fig. 5 is the alternating voltage waveform of brightness 3, Fig. 5 (a) for fire wire output end L1 single in process of transmitting, and Fig. 5 (b) is the voltage waveform of full-wave rectification end A in process of transmitting.Fig. 5 (c) is the pulse schematic diagram of phase shift sampling pulse in process of transmitting, when drawing Fig. 5 (c), idealized process has all been done in pulse 1, pulse 2, pulse 3, and namely signal is lower than doing low level process during high-level threshold, higher than doing high level process during high-level threshold.
Brightness wall control unit sends the method for brightness control signal as shown in Figure 7, comprising:
Steps A, the brightness degree of setting brightness control signal is brightness 1;
Step B, sends a brightness control signal;
Step C, judges whether brightness changes, and brightness changes, and returns step B; Brightness does not change, and maintains and does not send brightness control signal state, return step C.
The structure of brightness regulation driver element as shown in Figure 8, is made up of single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness driver module.
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 L1, zero line input N; Single-phase transformer output 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; Filter regulator circuit input is connected to DC supply; Filter regulator circuit Drazin inverse DC power supply, powers to luminance signal receiver module.
Luminance signal receiver module by regulating single-chip minimum system, luminance signal sampling shaping circuit forms, and regulates single-chip minimum system to be provided with pulse capture input and pwm pulse output.
Luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, voltage-stabiliser tube amplitude limiter circuit; Full-wave rectifying circuit input is connected to single-phase transformer output.The pulse capture input that voltage-stabiliser tube amplitude limiter circuit input is connected to full-wave rectifying circuit output, output is connected to single-chip minimum system.
LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal input.The direct-flow input end of LED drive module is connected to DC supply, and PWM brightness regulated signal input is connected to the pwm pulse output regulating single-chip microcomputer, and LED drive end is connected to LED.
Brightness regulation drive unit embodiment as shown in Figure 9.
In embodiment illustrated in fig. 9, single-phase rectifier power module of voltage regulation is made up of single-phase transformer TC, diode D05, diode D06, diode D07, diode D08, electric capacity C5, resistance R03, voltage-stabiliser tube DW02.Wherein, diode D05, diode D06, diode D07, diode D08 form single-phase rectifier bridge circuit, and electric capacity C5, resistance R03, voltage-stabiliser tube DW02 form filter regulator circuit.Electric capacity C5 obtains DC supply VIN to single-phase rectification bridge output filtering, Drazin inverse DC power supply VCC on voltage-stabiliser tube DW02.
In embodiment illustrated in fig. 9, luminance signal receiver module forms by regulating single-chip microcomputer U4, crystal oscillator XT2, diode D09, diode D10, resistance R6, resistance R7, voltage-stabiliser tube DW2.Wherein, adjustment single-chip microcomputer U4, crystal oscillator XT2 form single-chip minimum system, and the P2.0 regulating single-chip microcomputer U4 is pulse capture input, and P1.2 is pwm pulse output.Diode D09, diode D10 form full-wave rectifying circuit, and the anode of diode D09, diode D10 is connected to single-phase transformer output L2, N2 respectively, and negative electrode connection is full-wave rectifying circuit output.Resistance R6, resistance R7, voltage-stabiliser tube DW2 form voltage-stabiliser tube amplitude limiter circuit.One end of resistance R6 and voltage-stabiliser tube DW2 negative electrode connect for voltage-stabiliser tube amplitude limiter circuit output and are connected to the pulse capture input regulating single-chip microcomputer U4.Other one end of resistance R6 is voltage-stabiliser tube amplitude limiter circuit input and is connected to full-wave rectifying circuit output.Voltage-stabiliser tube DW2 anode is connected to reference to ground, and resistance R7 is connected in parallel on the two ends of voltage-stabiliser tube DW2.
The model regulating single-chip microcomputer U4 is MSP430G2553.Wall control single-chip microcomputer U3, adjustment single-chip microcomputer U4 can also select the low-power scm of other MSP430 series.
In embodiment illustrated in fig. 9, brightness driver module is made up of LED constant-current driver U5, inductance L G, resistance R8, fast recovery diode D2, and the model of LED constant-current driver is PT4115.The two ends of resistance R8 are connected to power voltage terminal VIN, the output current induction end SEN of LED constant-current driver U5 respectively; The output switching terminal SW that fast recovery diode D2 negative electrode is connected to the power voltage terminal VIN of LED constant-current driver U5, anode is connected to LED constant-current driver U5; One end of inductance L G is connected to the output switching terminal SW of LED constant-current driver U5; The other one end of the output current induction end SEN of LED constant-current driver U5 and inductance L G is LED drive end; The power voltage terminal VIN of LED constant-current driver U5 is the direct-flow input end of LED drive module; The brightness adjustment control end DIM of LED constant-current driver U5 is PWM brightness regulated signal input.
Brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module, and its method is:
Step one, the brightness degree of setting brightness control signal is brightness 1;
Step 2, regulates LED luminance;
Step 3, judges whether single live wire has brightness control signal; There is no brightness control signal, return step 3; There is brightness control signal, forward step 4 to;
Step 4, receives brightness control signal;
Step 5, returns step 2.
Judge whether single live wire has brightness control signal, method is judge whether live wire input L1 has phase shifting angle to be the single-phase half-sinusoid of β; Receive brightness control signal, method judges that continuous print phase shifting angle is the number of the single-phase half-sinusoid of β, has continuously
kindividual phase shifting angle is the single-phase half-sinusoid of β, and brightness control signal is brightness
k.Luminance signal sampling shaping circuit converts the alternating voltage on live wire input L1 to square wave, as shown in Fig. 5 (d).Negative pulse shown in phase shifting angle α, phase shifting angle β and Fig. 5 (d) is corresponding, and wherein phase shifting angle α respective pulses 4, pulse 8, pulse 9 is the negative pulse that width is narrower; Phase shifting angle β respective pulses 5, pulse 6, pulse 7 are the negative pulse of wider width.Luminance signal receiver module only needs to differentiate the width delivered to and regulate single-chip minimum system pulse capture input negative pulse, can judge whether live wire input L1 has phase shifting angle to be the single-phase half-sinusoid of β; Calculate the quantity that phase shifting angle is the single-phase half-sinusoid of β, can brightness control signal be obtained.
In Fig. 5, single chip control module the 1st time stop sending triggering signal time be engraved in the positive half wave of AC power, therefore, upper 1st phase shifting angle of live wire input L1 is that the single-phase half-sinusoid of β is for bearing half-wave.Because single chip control module stops for the 1st time the moment sending triggering signal to be random, so, stopping sending moment of triggering signal for 1st time also may at the negative half-wave of AC power, and now, upper 1st phase shifting angle of live wire input L1 is that the single-phase half-sinusoid of β becomes positive half wave.Because luminance signal sampling shaping circuit is to the first rectification of the alternating voltage on live wire input L1, be converted to square wave again, therefore, the 1st phase shifting angle is the single-phase half-sinusoid of β is positive half wave, or negative half-wave, does not affect brightness regulation driver element to the judgement of brightness control signal and reception.
Claims (10)
1. a LED wall controlled dimming method, is realized by LED list live wire light adjusting circuit, it is characterized in that:
Described LED list live wire light adjusting circuit is made up of brightness wall control unit, brightness regulation driver element; Described brightness wall control unit is provided with single live wire input, single fire wire output end, and described single live wire input is connected to AC power live wire; Described brightness regulation driver element is provided with live wire input, zero line input, and wherein, described live wire input is connected to single fire wire output end of brightness wall control unit, and described zero line input is connected to AC power zero line; Described AC power is single-phase 220V alternating current;
Described brightness wall control unit sends brightness control signal by the phase shifting angle controlling single fire wire output end output voltage waveforms, and brightness control signal has brightness 1-
n, altogether
nindividual brightness degree;
nfor being more than or equal to the integer of 2;
The method of described transmission brightness control signal is:
Steps A, the brightness degree of setting brightness control signal is brightness 1;
Step B, sends a brightness control signal;
Step C, judges whether brightness changes, and brightness changes, and returns step B; Brightness does not change, and maintains and does not send brightness control signal state, return step C;
Described maintenance does not send brightness control signal state, and single fire wire output end exports the single-phase half-sinusoid that positive and negative half-wave phase shifting angle is all α;
Describedly send a brightness control signal, single fire wire output end is continuous
kindividual half-wave exports the single-phase half-sinusoid that phase shifting angle is all β, and the brightness degree of the brightness control signal sent is brightness
k;
kfor being more than or equal to 1, being less than or equal to
ninteger;
Described phase shifting angle β is greater than phase shifting angle α;
Described brightness regulation driver element receives brightness control signal and adjusting brightness of LED lamps by luminance signal receiver module, and its method is:
Step one, the brightness degree of setting brightness control signal is brightness 1;
Step 2, regulates LED luminance;
Step 3, judges whether single live wire has brightness control signal; There is no brightness control signal, return step 3; There is brightness control signal, forward step 4 to;
Step 4, receives brightness control signal, determines brightness degree;
Step 5, returns step 2;
Describedly judge whether single live wire has brightness control signal, method is judge whether live wire input has phase shifting angle to be the single-phase half-sinusoid of β; Described reception brightness control signal, determines brightness degree, and method judges that continuous print phase shifting angle is the number of the single-phase half-sinusoid of β, has continuously
kindividual phase shifting angle is the single-phase half-sinusoid of β, and the brightness degree of brightness control signal is brightness
k.
2. LED wall controlled dimming method according to claim 1, is characterized in that: described phase shifting angle is that the single-phase half-sinusoid of β takes phase shift sampling pulse triggering mode; It is all that the single-phase half-sinusoid of α takes uninterrupted triggering mode that described single fire wire output end exports positive and negative half-wave phase shifting angle.
3. LED wall controlled dimming method according to claim 2, is characterized in that: described in take phase shift sampling pulse triggering mode, the initial time of its trigger impulse is after phase shift sampling pulse.
4. LED wall controlled dimming method according to claim 2, is characterized in that: described in take uninterrupted triggering mode, method is that triggering signal remains effective always.
5. LED wall controlled dimming method according to claim 1, is characterized in that: described phase shifting angle α=4 °, phase shifting angle β=30 °.
6. LED wall controlled dimming method according to claim 1, is characterized in that: described in
n=8.
7. LED wall controlled dimming method according to claim 1, is characterized in that: described brightness wall control unit is made up of single fire-wire power module, rectification phase shift driver module, waveform sampling Shaping Module, single chip control module, trigger control module, the given module of brightness.
8. LED wall controlled dimming method according to claim 7, is characterized in that: described single chip control module is wall control single-chip minimum system, has brightness Setting signal input, phase shift sampling pulse input, triggering signal output;
Described rectification phase shift driver module is that unidirectional thyristor exchanges phase switcher circuit, is made up of unidirectional thyristor and single phase bridge type rectifier circu; 2 ac input ends of single phase bridge type rectifier circu are respectively single live wire input, single fire wire output end; The rectification output plus terminal of single phase bridge type rectifier circu is full-wave rectification end, and it is publicly that rectification exports negative terminal; The anode of unidirectional thyristor, negative electrode are connected to full-wave rectification end, publicly respectively;
Described single fire-wire power module is DC/DC voltage stabilizing circuit, and input is connected to full-wave rectification end, and output exports single live wire control power supply and powers to single chip control module; Described DC/DC voltage stabilizing circuit has the voltage input characteristics of wide region;
Described waveform sampling Shaping Module is resistor voltage divider circuit, and input is connected to full-wave rectification end, and output exports phase shift sampling pulse; Phase shift sampling pulse is by voltage-stabiliser tube amplitude limit and be connected to single chip control module;
Described brightness given module output brightness Setting signal delivers to single chip control module;
The triggering signal input of described trigger control module is connected to single chip control module, and output is connected to unidirectional thyristor and controls pole.
9. LED wall controlled dimming method according to claim 1, is characterized in that: described brightness regulation driver element is made up of single-phase rectifier power module of voltage regulation, luminance signal receiver module, brightness driver module.
10. LED wall controlled dimming method according to claim 9, is characterized in that: described 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 output 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; Filter regulator circuit input is connected to DC supply; Filter regulator circuit output Drazin inverse DC power supply is powered to luminance signal receiver module;
Described luminance signal receiver module by regulating single-chip minimum system, luminance signal sampling shaping circuit forms;
Described adjustment single-chip minimum system is provided with pulse capture input and pwm pulse output;
Described luminance signal sampling shaping circuit is made up of full-wave rectifying circuit, voltage-stabiliser tube amplitude limiter circuit; Full-wave rectifying circuit input is connected to single-phase transformer output; Voltage-stabiliser tube amplitude limiter circuit input is connected to full-wave rectifying circuit output, output is connected to the pulse capture input regulating single-chip minimum system;
Described LED drive module is provided with direct-flow input end, LED drive end, PWM brightness regulated signal input; The direct-flow input end of LED drive module is connected to DC supply, and PWM brightness regulated signal input is connected to the pwm pulse output regulating single-chip minimum system, and LED drive end is connected to LED.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510229502.6A CN104837257A (en) | 2015-05-08 | 2015-05-08 | Wall-controlled dimming method for LED lamp |
| CN201710790580.2A CN107396503B (en) | 2015-05-08 | 2015-05-08 | Method for sending LED lamp brightness control signal through single live wire |
| CN201811144135.XA CN109195256B (en) | 2015-05-08 | 2015-05-08 | Method for controlling phase shifting angle on single live wire |
| CN201811144265.3A CN109195257B (en) | 2015-05-08 | 2015-05-08 | Wall-controlled dimming method for LED lamp |
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| CN201811144265.3A Division CN109195257B (en) | 2015-05-08 | 2015-05-08 | Wall-controlled dimming method for LED lamp |
| CN201811144135.XA Division CN109195256B (en) | 2015-05-08 | 2015-05-08 | Method for controlling phase shifting angle on single live wire |
| CN201710790580.2A Division CN107396503B (en) | 2015-05-08 | 2015-05-08 | Method for sending LED lamp brightness control signal through single live wire |
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| CN201710790580.2A Active CN107396503B (en) | 2015-05-08 | 2015-05-08 | Method for sending LED lamp brightness control signal through single live wire |
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| CN201710790580.2A Active CN107396503B (en) | 2015-05-08 | 2015-05-08 | Method for sending LED lamp brightness control signal through single live wire |
| CN201811144135.XA Active CN109195256B (en) | 2015-05-08 | 2015-05-08 | Method for controlling phase shifting angle on single live wire |
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| CN107396503B (en) | 2020-06-09 |
| CN109195257B (en) | 2020-09-04 |
| CN109195257A (en) | 2019-01-11 |
| CN107396503A (en) | 2017-11-24 |
| CN109195256B (en) | 2020-09-04 |
| CN109195256A (en) | 2019-01-11 |
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