CN206164925U - LED silicon controlled rectifier phase control dimmer and eliminate stroboscopic circuit thereof - Google Patents

LED silicon controlled rectifier phase control dimmer and eliminate stroboscopic circuit thereof Download PDF

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Publication number
CN206164925U
CN206164925U CN201621211916.2U CN201621211916U CN206164925U CN 206164925 U CN206164925 U CN 206164925U CN 201621211916 U CN201621211916 U CN 201621211916U CN 206164925 U CN206164925 U CN 206164925U
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China
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led
energy
control
over
module
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麦炎全
陈小雨
陈博
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SHENZHEN SHENDIE SEMICONDUCTOR CO Ltd
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SHENZHEN SHENDIE SEMICONDUCTOR CO Ltd
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Abstract

The utility model discloses a LED silicon controlled rectifier phase control dimmer and eliminate stroboscopic circuit thereof, wherein, the circuit includes rectifier module, energy storage module and the stroboscopic control module that disappears. Two commutating period's that the stroboscopic control module that disappears is more adjacent phase place regulated value's size, in the big commutating period of phase place regulated value, through the turn -on time that the energy storage module prolongs LED lamp cluster for LED lamp statements based on collusion electricity, make the turn -on time among the commutating period that turn -on time is little with phase place regulated value of LED lamp cluster in the big commutating period of phase place regulated value unanimous, promptly for the turn -on time of LED lamp cluster is unanimous among two adjacent commutating period, has eliminated the stroboscopic.

Description

A kind of circuit of LED controllable silicons phase controlled light modulator and its elimination stroboscopic
Technical field
This utility model is related to field of LED illumination, more particularly to a kind of LED controllable silicons phase controlled light modulator and its elimination The circuit of stroboscopic.
Background technology
In the prior art, the phase controlled light modulator realized using bidirectional triode thyristor, due to the forward direction of bidirectional triode thyristor Trigger current is different from reverse trigger current, causes the positive phase place for adjusting of phase controlled light modulator output and the reverse phase for adjusting Position is inconsistent;Odd cycle is converted into after rectifier bridge inconsistent with the regulation phase place of even cycle;Finally it is embodied in LED On be that odd cycle is inconsistent with the brightness of even cycle, i.e., LED can flash, and frequency is consistent with line voltage, usually 50hz, can See stroboscopic.
As shown in figure 1, it is θ 1 that forward direction controls phase place, Reverse Turning Control phase place is θ 2, it is assumed that θ 1<θ 2, the first commutation cycle LED The time lighted is longer than the time that the second commutation cycle LED is lighted, so the rectification of brightness ratio second of the first commutation cycle LED The brightness of period L ED is brighter;In the same manner, the brightness of the 3rd commutation cycle LED is also brighter than the brightness of the second commutation cycle LED, by This defines visible stroboscopic.
Thus prior art could be improved and improve.
Utility model content
In view of above-mentioned the deficiencies in the prior art part, the purpose of this utility model is to provide a kind of LED controllable silicons phase place The circuit of control dimmer and its elimination stroboscopic, by the phase adjusted value of two relatively more adjacent commutation cycles, eliminates strange Luminance difference during number shaping cycle and even number shaping week, without visible stroboscopic.
In order to achieve the above object, this utility model takes technical scheme below:
A kind of LED controllable silicons phase controlled light modulator eliminates the circuit of stroboscopic, and the circuit connects with LED series winding, described Circuit includes:
For carrying out rectification, and the rectification module of electricity of acting in collusion to make each other's confessions to LED to have passed through phase-adjusted alternating current;
For storing electric energy, and the energy-storage module of electricity of acting in collusion to make each other's confessions to LED according to the frequent flashing control module that disappears;
For the size of the phase adjusted value of two relatively more adjacent commutation cycles;In the phase adjusted value big commutation cycle In, act in collusion to make each other's confessions electricity to LED to extend the ON time of LED string by energy-storage module, make LED string big in phase adjusted value The consistent frequent flashing control module that disappears of ON time in ON time in the commutation cycle commutation cycle little with phase adjusted value;
The outfan of the rectification module connects the input of the frequent flashing control module that disappears and connects LED by energy-storage module The positive pole of lamp string, the minus earth of the LED string, the outfan of the frequent flashing control module that disappears connects the control of energy-storage module End.
Described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, and the frequent flashing control module that disappears includes:
For the output voltage of real-time detection rectification module, and it is big with threshold voltage to compare the output voltage of rectification module It is little, the first over-pressed signal is exported when the output voltage of rectification module is more than threshold voltage and gives control of discharge unit;In rectification mould The output voltage of block exports line voltage detector unit of the second over-pressed signal to control of discharge unit when being less than threshold voltage;It is described Over-pressed signal is periodic signal;
For the persistent period that over-pressed signal in relatively more adjacent two over-pressed signal periods is the second over-pressed signal; In shorter over-pressed signal period persistent period of two over-pressed signals, LED statements based on collusion electricity is given by controlling energy-storage module, make the mistake In the pressure signal period effective time and the input voltage in the adjacent over-pressed signal period of the input voltage of LED string it is effective when Between consistent control of discharge unit;
The input of the line voltage detector unit is the input of frequent flashing control module of disappearing, and connects the output of rectification module End, the outfan of the line voltage detector unit connects the input of control of discharge unit;The output of the control of discharge unit Hold as the outfan of the frequent flashing control module that disappears, the control end of connection energy-storage module.
Described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, and the control of discharge unit includes:
Timer;
For when over-pressed signal is changed into the second over-pressed signal from the first over-pressed signal, timing being reset and opening to timer Device timing;Over-pressed signal is the second over-pressed signal in the time of current timer is more than or equal to the previous over-pressed signal period Persistent period and when now over-pressed signal is the second over-pressed signal, control energy-storage module gives LED statements based on collusion electricity;Afterwards in overvoltage When signal is changed into the first over-pressed signal, when control energy-storage module stops to LED statements based on collusion electricity and stops timer, by rectification mould Control subelement of the block to LED statements based on collusion electricity;
The input for controlling subelement for control of discharge unit input, the output of connecting line voltage detection unit End;The outfan for controlling subelement is the outfan of control of discharge unit, connects the control end of energy-storage module;The control Subelement is also connected with the timer.
Described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, and the line voltage detector unit includes First resistor, second resistance, comparator and power supply;One end of the first resistor is the input of line voltage detector unit, connects Connect the outfan of rectification module and the input of energy-storage module;The positive input of the other end connection comparator of the first resistor End is simultaneously grounded by second resistance, and the positive pole of the power supply connects the inverting input of comparator, and the negative pole of the power supply connects Ground, the outfan of the comparator is the outfan of line voltage detector unit, connects the input of the control of discharge unit.
Described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, the energy-storage module include switch, the One diode, the second diode and the energy-storage units for energy storage;The just extremely input of energy-storage module of first diode End, connects the positive pole of the outfan, the input of line voltage detector unit and the second diode of rectification module;One or two pole The negative pole of pipe connects the input of energy-storage units, and the outfan of the energy-storage units connects one end of the switch;The switch The other end for energy-storage module outfan, connect the second diode negative pole and LED string positive pole;The control of the switch The control end for energy-storage module is held, connects the outfan of control of discharge unit.
Described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, and the energy-storage units are electric capacity;It is described One end of electric capacity is the input of energy-storage units, connects the negative pole of the first diode;The other end of the electric capacity is energy-storage units Outfan, connect one end of the switch.
A kind of LED controllable silicons phase controlled light modulator, including LED controllable silicons phase controlled light modulator as above elimination The circuit of stroboscopic.
Compared to prior art, this utility model provides a kind of LED controllable silicons phase controlled light modulator and its eliminates stroboscopic Circuit, wherein, the circuit includes rectification module, energy-storage module and the frequent flashing control module that disappears.The frequent flashing control module that disappears compares The size of the phase adjusted value of two adjacent commutation cycles;In the phase adjusted value big commutation cycle, by energy-storage module Act in collusion to make each other's confessions electricity to extend the ON time of LED string to LED, make LED string leading in the phase adjusted value big commutation cycle ON time in commutation cycle little with phase adjusted value logical time is consistent;I.e. so that LED in two adjacent commutation cycles The ON time of lamp string is consistent, eliminates stroboscopic.
Description of the drawings
Fig. 1 is in existing LED controllable silicons phase controlled light modulator, line voltage, dimmer output voltage before light modulation, whole The oscillogram of the electric current of stream bridge output voltage and LED.
Fig. 2 eliminates the circuit diagram of the circuit of stroboscopic for the LED controllable silicons phase controlled light modulator that this utility model is provided.
Fig. 3 is eliminated in the circuit of stroboscopic for the LED controllable silicons phase controlled light modulator that this utility model is provided, rectification module The oscillogram of the voltage of output voltage, over-pressed signal, the output voltage of control of discharge unit and LED string.
Fig. 4 is eliminated in the circuit of stroboscopic for the LED controllable silicons phase controlled light modulator that the present invention is provided, control of discharge unit Structured flowchart.
Fig. 5 is eliminated in the circuit of stroboscopic for the LED controllable silicons phase controlled light modulator that this utility model is provided, line voltage inspection Survey the circuit diagram of unit.
Fig. 6 eliminates the method flow diagram of stroboscopic for the LED controllable silicons phase controlled light modulator that this utility model is provided.
Specific embodiment
This utility model provides a kind of LED controllable silicons phase controlled light modulator and its eliminates the circuit of stroboscopic.To make this reality Clearer, clear and definite with new purpose, technical scheme and effect, the embodiment that develops simultaneously referring to the drawings is entered to this utility model One step is described in detail.It should be appreciated that specific embodiment described herein is not used to limit only to explain this utility model This utility model.
This utility model provides the circuit that a kind of LED controllable silicons phase controlled light modulator eliminates stroboscopic, as shown in Fig. 2 institute The circuit for stating LED controllable silicons phase controlled light modulator elimination stroboscopic is connected with LED string 40, and the circuit includes rectification module 10th, energy-storage module 30 and the frequent flashing control module 20 that disappears.The input input of the rectification module 10 have passed through phase-adjusted friendship Stream electricity AC, the outfan of the rectification module 10 is connected the input of the frequent flashing control module 20 that disappears and is connected by energy-storage module 30 Connect the positive pole of LED string 40, the minus earth of the LED string 40, the outfan connection storage of the frequent flashing control module 20 that disappears The control end of energy module 30.
The rectification module 10, for carrying out rectification to have passed through phase-adjusted alternating current, and gives the He of energy-storage module 30 LED string 40 is powered.In the present embodiment, the rectification module 10 is rectifier bridge.
The energy-storage module 30, for storing electric energy, and powers according to the frequent flashing control module 20 that disappears to LED string 40.
The frequent flashing control module 20 that disappears, for the phase adjusted value of the output voltage of real-time detection rectification module, compares The size of the phase adjusted value of two adjacent commutation cycles;In the phase adjusted value big commutation cycle, by energy-storage module 10 power to extend the ON time of LED string 40 to LED string 40, make LED string 40 in phase adjusted value big rectification week ON time in the interim ON time commutation cycle little with phase adjusted value is consistent.
Due to stroboscopic be the output voltage of rectification module 10 odd cycle it is different with the voltage of even cycle caused by, tool Have periodically.Therefore, the operation principle of the frequent flashing control module 20 that disappears can also be retouched by odd cycle and even cycle State.The i.e. described frequent flashing control module 20 that disappears, for the phase adjusted value of the output voltage of real-time detection rectification module, comparison is adjacent Two commutation cycles phase adjusted value(θ 1 and θ 2)Size, by control energy-storage module 30 power to LED string 40, make The lighting time of the LED string 40 of commutation cycle big with phase adjusted value lighting time of LED string 40 is consistent.For changing It, in the phase adjusted value little commutation cycle, shifts to an earlier date lightening LED lamp string 40 so that LED in this cycle by energy-storage module 30 The lighting time of lamp string 40 is consistent with the lighting time of the LED string 40 in a upper cycle, as a result, in each commutation cycle The ON time of LED string is all identical, eliminates stroboscopic.Specifically, the frequent flashing control module 20 that disappears is in the odd number commutation cycle Phase adjusted value more than the even number commutation cycle phase adjusted value when, in the current and/or follow-up odd number commutation cycle lead to Cross control energy-storage module 30 to power to LED string 40, make the effective time of the input voltage of LED string 40 in the odd number commutation cycle (That is lighting time)It is consistent with the effective time of the input voltage of LED string 40 in the even number commutation cycle;In the even number commutation cycle Phase adjusted value more than the odd number commutation cycle phase adjusted value when, in the current and/or follow-up even number commutation cycle lead to Cross control energy-storage module 30 to power to LED string 40, make the effective time of the input voltage of LED string 40 in the even number commutation cycle It is consistent with the effective time of the input voltage of LED string 40 in the odd number commutation cycle.Two adjacent commutation cycles, can be with Be the previous commutation cycle with current collation cycle, or the first two commutation cycle, the present embodiment is for the former.That is, it is described When the phase adjusted value of the frequent flashing control module that disappears more previous commutation cycle is more than the phase adjusted value of current commutation cycle, working as Powered to LED string 40 by control energy-storage module 30 in the front commutation cycle, make the defeated of LED string 40 in the current commutation cycle Enter the effective time of voltage(That is lighting time)With the effective time one of the input voltage of LED string 40 in the previous commutation cycle Cause;Or, two more adjacent commutation cycles of the frequent flashing control module that disappears, draw odd number commutation cycle or even number rectification The phase adjusted value in cycle is big, in follow-up all commutation cycles, all phase adjusted values big odd number commutation cycle or The even number commutation cycle is powered by control energy-storage module 30 to LED string 40, makes the defeated of LED string 40 in the current commutation cycle Enter the effective time of voltage(That is lighting time)With the effective time one of the input voltage of LED string 40 in the previous commutation cycle Cause.The input voltage effective time in one cycle of LED string 40 refer to input voltage more than threshold voltage vt h it is total when Between.
The phase adjusted value of the output voltage of the real-time detection rectification module 10 of frequent flashing control module 20 that disappears, comparison is adjacent Two commutation cycles phase adjusted value size;Specially:The adjacent two commutation cycles respective phase place of real-time detection The corresponding regulating time of regulated value, the size of the regulating time of two adjacent commutation cycles of comparison.The phase adjusted value pair The regulating time answered, just refers in Fig. 3, θ 1 and the corresponding time periods of θ 2.In other words, the frequent flashing control module 20 that disappears is concrete For the output voltage of real-time detection rectification module 10 to obtain adjacent two rectification by the output voltage of rectification module 10 The corresponding regulating time of cycle respective phase adjusted value;The length of the regulating time of two adjacent commutation cycles of comparison, In the commutation cycle of regulating time length, when being powered come the conducting for extending LED string 40 to LED string 40 by energy-storage module 30 Between, make leading in ON time of the LED string 40 in the commutation cycle of the regulating time length commutation cycle little with regulating time Logical time consistency.This utility model indirectly represents phase adjusted value with the time, and the time is more readily detected, therefore improves tune The accuracy of section.
Further, the frequent flashing control module 20 that disappears is including line voltage detector unit 210 and control of discharge unit 220. The input of the line voltage detector unit 210 is the input of frequent flashing control module 20 of disappearing, and connects the output of rectification module 10 End, the input of the outfan connection control of discharge unit 220 of the line voltage detector unit 210, the control of discharge unit 220 outfan connects the control end of energy-storage module.
In the embodiment that this utility model is provided, the line voltage detector unit 210, for real-time detection rectification module 10 Output voltage Vac, and compare the size of the output voltage Vac and threshold voltage vt h of rectification module 10, in rectification module 10 Output voltage Vac exports the first over-pressed signal to control of discharge unit 220 when being more than threshold voltage vt h;In rectification module 10 Output voltage Vac exports the second over-pressed signal to control of discharge unit 220 when being less than threshold voltage vt h;Because rectification module 10 Output voltage Vac be periodic, its cycle is T, therefore the over-pressed signal OVH is also periodic signal, specifically by the first mistake Pressure signal and the second over-pressed signal composition, its cycle is similarly T.The first over-pressed signal is high level or low level, second Over-pressed signal is low level or high level, and the first over-pressed signal is different from the second over-pressed signal.In the present embodiment, first mistake Pressure signal is high level, and the described second over-pressed signal is low level.The threshold voltage vt h is less than the corresponding electricity of phase adjusted value Pressure, and more than or equal to the conducting voltage of LED string 40, it is preferred that the threshold voltage vt h is the conducting voltage of LED string 40. Thus, it is possible to judge that LED string 40 is with the size of threshold voltage vt h according to the output voltage for judging rectification module 10 Vac It is no to light.
The control of discharge unit 220, is the second mistake for over-pressed signal in relatively more adjacent two over-pressed signal periods The persistent period of pressure signal;In shorter over-pressed signal period persistent period of the second over-pressed signal, by controlling energy storage mould Block 30 is powered to LED string 40, makes the effective time of the input voltage of LED string 40 in the over-pressed signal period and adjacent overvoltage The effective time of the input voltage in the signal period is consistent.In other words, the control of discharge unit 220, for relatively more adjacent Two over-pressed signal periods in over-pressed signal be the second over-pressed signal persistent period;In the overvoltage of odd number overvoltage signal period It is holding for the second over-pressed signal that signal is the over-pressed signal for the persistent period of the second over-pressed signal being more than the even number overvoltage signal period During the continuous time, control energy-storage module 30 in the current and/or follow-up odd number overvoltage signal period and power to LED string 40, it Afterwards when the over-pressed signal is changed into the first over-pressed signal from the second over-pressed signal, stop energy-storage module 30 and supply to LED string 40 Electricity(Close energy-storage module 30), powered to LED string 40 by rectification module 10, make LED string in the odd number overvoltage signal period The effective time of 40 input voltage is consistent with the effective time of the input voltage of LED string in the even number overvoltage signal period;With And the persistent period that the over-pressed signal in the even number overvoltage signal period is the second over-pressed signal is more than the odd number overvoltage signal period When over-pressed signal is the persistent period of the second over-pressed signal, by storage in the current and/or follow-up even number overvoltage signal period Energy module 30 is powered to LED string 40, afterwards when the over-pressed signal is changed into the first over-pressed signal from the second over-pressed signal, is stopped Only energy-storage module 30 is powered to LED string 40(Close energy-storage module 30), powered to LED string 40 by rectification module 10, make In the even number overvoltage signal period in effective time and the odd number of the input voltage of the LED string over-pressed signal period LED string it is defeated The effective time for entering voltage is consistent.
Further, Fig. 4 is referred to, the control of discharge unit 220 includes timer 221 and control subelement 222.Institute State the input for controlling the input of subelement 222 for control of discharge unit 220, the outfan of connecting line voltage detection unit, The outfan of the control subelement 222 connects the control end of energy-storage module 30, and the control subelement 222 is also connected with the meter When device 221.
The control subelement 222, for when over-pressed signal OVH is changed into the second over-pressed signal from the first over-pressed signal, When resetting to timer 221 and opening timer;The first over-pressed signal is changed into from the second over-pressed signal in over-pressed signal and is worked as When the time of front timer 221 is less than the persistent period that over-pressed signal in the previous over-pressed signal period is the second over-pressed signal, by Rectification module 10 is powered to LED string 40, makes energy-storage module 30 close output;It is more than or equal in the time of current timer Over-pressed signal is persistent period of the second over-pressed signal and now over-pressed signal is the second overvoltage letter in the previous over-pressed signal period Number when, control energy-storage module 30 is powered to LED string 40, afterwards when over-pressed signal OVH is changed into the first over-pressed signal, control storage Energy module 30 stops that the timing of timer 221 is powered and stopped to LED string 40 and records clocking value, and by rectification module 10 LED is given Lamp string 40 is powered;When over-pressed signal is changed into the first over-pressed signal from the second over-pressed signal, stops the timing of timer 221 and record Clocking value, when timer duration is less than the clocking value of previous periodic recording, does not trigger electric discharge and enables, all the time by rectification module 10 Power to LED string 40.The control subelement 222 is made up of memorizer and CL Compare Logic circuit.The control subelement bag Include single-chip microcomputer, such as 8051 single-chip microcomputers.
It can thus be appreciated that when this utility model adopts timer, being capable of achieving LED string by simple logic control and leading The change of logical time, so as to eliminate stroboscopic, simple structure low cost is applied widely.
Fig. 5 is referred to, in the first embodiment, the line voltage detector unit 210 includes first resistor R1, second resistance R2, comparator Q1 and power supply V1;One end of first resistor R1 is the input of line voltage detector unit 210, connects rectification The outfan of module 10 and the input of energy-storage module 30, the positive of the other end connection comparator Q1 of first resistor R1 is defeated Enter end and be grounded by second resistance R2, the positive pole of the power supply V1 connects the inverting input of comparator Q1, the power supply V1 Minus earth, the outfan of the comparator Q1 for line voltage detector unit 210 outfan, connect the control of discharge list The input of unit 220.The voltage of the power supply V1 is exactly threshold voltage vt h.Certainly, in a second embodiment, the power supply V1 Positive pole connect the normal phase input end of comparator Q1, the other end of the first resistor connects the inverting input of comparator Q1, I.e. comparator Q1 is contrary with the connection of first embodiment.
Please continue to refer to Fig. 2, described LED controllable silicons phase controlled light modulator is eliminated in the circuit of stroboscopic, the energy storage Module 30 includes switch K, the first diode D1, the second diode D2 and the energy-storage units 310 for energy storage;One or two pole The just extremely input of energy-storage module 30 of pipe D1, connects outfan, the input of line voltage detector unit 210 of rectification module 10 End and the positive pole of the second diode D2;The negative pole of the first diode D1 connects the input of energy-storage units 310, the energy storage The outfan of unit 310 connects one end of the switch K;The other end of the switch K is the outfan of energy-storage module 30, connects The negative pole of the second diode D2 and the positive pole of LED string 40;The control end of the switch K is the control end of energy-storage module 30, connects Connect the outfan of control of discharge unit 220.It follows that control of discharge unit 220 only needs the break-make of controlling switch K to be capable of achieving The release of the energy of energy-storage units 310 is easy to control quick.
The switch K can be digital switch, or switching tube(Metal-oxide-semiconductor).The energy-storage units 310 are preferably electricity Hold;One end of the electric capacity is the input of energy-storage units 310, connects the negative pole of the first diode D1;The electric capacity it is another Hold as the outfan of energy-storage units 310, one end of connecting valve K.It follows that this utility model is set by cleverly circuit Meter, simple structure eliminates stroboscopic.
Described LED controllable silicons phase controlled light modulator eliminates the circuit of stroboscopic also includes constant flow module I, the constant current mould Block I is used to carry out LED string 40 constant-current driving, and the LED string 40 is grounded by the constant flow module I.
Principle of the present utility model can be illustrated preferably with reference to Fig. 3, in the first embodiment, it is known that the commutation cycle is T, Vac drop to the time Toffset of 0V from Vth, from the property of trigonometric function:
(t1-Toffset)/1/180 ° of T=θ, (t2-Toffset)/2/180 ° of T=θ;Therefore the calculating to angle can turn Change the calculating to the time into.Wherein, t1 and t2 are that over-pressed signal OVH is low level in adjacent two overvoltage signal period T Persistent period, t2 > t1;θ 1 and θ 2 is adjacent two over-pressed signal periods(Commutation cycle)In phase adjusted value.
Comparator Q1 detection rectifier bridge output voltage Vac are high electricity more than the over-pressed signal OVH that threshold voltage vt h is then exported It is flat, it is otherwise low level.It is to be respectively the low time that control of discharge unit 220 measures the OVH of two neighboring over-pressed signal period T1 and t2.Control of discharge unit 220 compares this cycle OVH when be the low time for having maintained with previous cycle OVH being low total Between, if both are equal, and when OVH is not high, the discharge switch of control of discharge unit 220 enables signal enable(Electric discharge The output voltage of control unit)High level is output as, switch K is turned on, the electric discharge of energy-storage module 30 shifts to an earlier date lightening LED lamp string, such as A sections in Fig. 3 in the voltage waveform of LED string.Until OVH is high, the enable signal outputs of control of discharge unit For low level, switch K is disconnected, by Vac LED statements based on collusion electricity, the T1 cycles of such as Fig. 3 are given;Otherwise, control of discharge unit Enable signals remain low level, and by Vac LED statements based on collusion electricity, the T2 cycles of such as Fig. 3 are given.So so that former and later two cycles Time for lighting of lamp string it is equal.By taking the second over-pressed signal period T2 as an example, control of discharge unit 220 compares this cycle OVH and is The overvoltage signal period OVH of the low time t1 for having maintained and first are low total time t2, and t1 is both less than always t2, control of discharge The enable signals of unit remain low level, and by Vac LED statements based on collusion electricity is given.After into the 3rd over-pressed signal period T3, put Electric control unit 220 compare this cycle OVH to be the overvoltage signal period OVH of the low time t2 for having maintained and second when being low total Between t1, in t2=t1 and OVH for it is high when, the discharge switch of control of discharge unit 220 enables signal enable(Control of discharge The output voltage of unit)High level is output as, switch K is turned on, the electric discharge of energy-storage module 30 shifts to an earlier date lightening LED lamp string, in such as Fig. 3 A sections in the voltage waveform of LED string.Until OVH is high, the enable signal outputs of control of discharge unit are low electricity It is flat, switch K is disconnected, give LED statements based on collusion electricity by VAC.
When phase controlled light modulator dims LED, that is, control phase theta and become big, this circuit needs to postpone 1 commutation cycle Respond, but the time of 1 commutation cycle will not be caught by human eye;When phase controlled light modulator lightens LED, that is, control phase Position θ diminishes, and the system can make an immediate response, therefore not interfere with dimming effect.
The circuit of stroboscopic is eliminated based on the LED controllable silicons phase controlled light modulator in above-described embodiment, this utility model is also A kind of LED controllable silicons phase controlled light modulator is provided, the dimmer includes pcb board, above-mentioned disappearing is provided with the pcb board Except the circuit of stroboscopic.Because the concrete principle and detail technical features of the LED controllable silicons phase controlled light modulator is in above-mentioned reality Apply in example and elaborate, will not be described here.
Based on the LED controllable silicons phase controlled light modulator in above-described embodiment and its circuit of elimination stroboscopic, this practicality is new Type also provides a kind of method that LED controllable silicons phase controlled light modulator eliminates stroboscopic, refers to Fig. 6, and methods described includes as follows Step:
S10, rectification module carry out rectification to have passed through phase-adjusted alternating current, and give LED statements based on collusion electricity;
The size of the phase adjusted value of two more adjacent commutation cycles of S20, the frequent flashing control module that disappears;In phase adjusted In the value big commutation cycle, act in collusion to make each other's confessions electricity to LED to extend the ON time of LED string by energy-storage module, make LED string exist ON time in ON time in the phase adjusted value big commutation cycle commutation cycle little with phase adjusted value is consistent.
Further, described LED controllable silicons phase controlled light modulator is eliminated in the method for stroboscopic, the step S20 tool Body includes:
Disappear the output voltage of frequent flashing control module real-time detection rectification module, and by the output voltage of rectification module phase is obtained The adjacent corresponding regulating time of two commutation cycles respective phase adjusted value;During the regulation of two adjacent commutation cycles of comparison Between length, in the commutation cycle of regulating time length, by energy-storage module to LED statements based on collusion electricity extending leading for LED string The logical time, in making ON time of the LED string in the commutation cycle of regulating time length and regulating time little commutation cycle ON time is consistent.
Described LED controllable silicons phase controlled light modulator is eliminated in the method for stroboscopic, and the frequent flashing control module that disappears includes Line voltage detector unit and control of discharge unit;Step S20 specifically includes following steps:
210th, the output voltage of line voltage detector unit real-time detection rectification module, and compare the output voltage of rectification module With the size of threshold voltage, the first over-pressed signal is exported when the output voltage of rectification module is more than threshold voltage to control of discharge Unit;The second over-pressed signal is exported when the output voltage of rectification module is less than threshold voltage and gives control of discharge unit;The mistake Pressure signal is periodic signal;
220th, over-pressed signal is the second over-pressed signal in two more adjacent over-pressed signal periods of control of discharge unit Persistent period;In shorter over-pressed signal period persistent period of the second over-pressed signal, by controlling energy-storage module to LED Statements based on collusion electricity, make LED string in the over-pressed signal period input voltage effective time with it is defeated in the adjacent over-pressed signal period The effective time for entering voltage is consistent.
Further, the control of discharge unit includes timer and control subelement, and the step 220 is specifically wrapped Include:Control subelement when over-pressed signal is changed into the second over-pressed signal from the first over-pressed signal, when opening timer;Current The time of timer more than or equal to the persistent period that over-pressed signal in the previous over-pressed signal period is the second over-pressed signal and this When over-pressed signal when being the second over-pressed signal, control energy-storage module gives LED statements based on collusion electricity;It is changed into the first mistake in over-pressed signal afterwards During pressure signal, when control energy-storage module stops to LED statements based on collusion electricity and stops timer.
Because the LED controllable silicons phase controlled light modulator eliminates the concrete principle and detail technical features of the method for stroboscopic Elaborate in the above-described embodiments, will not be described here.
The division of above-mentioned functions module only to illustrate, in actual applications, can as needed by above-mentioned functions Distribution is completed by different functional modules, that is, be divided into different functional modules to complete all or part of foregoing description Function.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and Its utility model design in addition equivalent or change, and all these changes or replace all should belong to appended by this utility model Scope of the claims.

Claims (7)

1. a kind of LED controllable silicons phase controlled light modulator eliminates the circuit of stroboscopic, and the circuit connects with LED series winding, its feature It is that the circuit includes:
For carrying out rectification, and the rectification module of electricity of acting in collusion to make each other's confessions to LED to have passed through phase-adjusted alternating current;
For storing electric energy, and the energy-storage module of electricity of acting in collusion to make each other's confessions to LED according to the frequent flashing control module that disappears;
For the size of the phase adjusted value of two relatively more adjacent commutation cycles;In the phase adjusted value big commutation cycle, Extend the ON time of LED string to LED statements based on collusion electricity by energy-storage module, make LED string in big whole of phase adjusted value The consistent frequent flashing control module that disappears of ON time in ON time in the stream cycle commutation cycle little with phase adjusted value;
The outfan of the rectification module connects the input of the frequent flashing control module that disappears and connects LED string by energy-storage module Positive pole, the minus earth of the LED string, the outfan of the frequent flashing control module that disappears connects the control end of energy-storage module.
2. LED controllable silicons phase controlled light modulator according to claim 1 eliminates the circuit of stroboscopic, it is characterised in that institute Stating the frequent flashing control module that disappears includes:
For the output voltage of real-time detection rectification module, and compare the output voltage of rectification module and the size of threshold voltage, The first over-pressed signal is exported when the output voltage of rectification module is more than threshold voltage and gives control of discharge unit;In rectification module Output voltage exports line voltage detector unit of the second over-pressed signal to control of discharge unit when being less than threshold voltage;The overvoltage Signal is periodic signal;
For the persistent period that over-pressed signal in relatively more adjacent two over-pressed signal periods is the second over-pressed signal;In the second mistake In shorter over-pressed signal period persistent period of pressure signal, LED statements based on collusion electricity is given by controlling energy-storage module, believe the overvoltage The effective time one of the effective time of the input voltage of LED string and the input voltage in the adjacent over-pressed signal period in number cycle The control of discharge unit of cause;
The input of the line voltage detector unit is the input of frequent flashing control module of disappearing, and connects the outfan of rectification module, The outfan of the line voltage detector unit connects the input of control of discharge unit;The outfan of the control of discharge unit is The outfan of the frequent flashing control module that disappears, connects the control end of energy-storage module.
3. LED controllable silicons phase controlled light modulator according to claim 2 eliminates the circuit of stroboscopic, it is characterised in that institute Stating control of discharge unit includes:
Timer;
For when over-pressed signal is changed into the second over-pressed signal from the first over-pressed signal, timer being reset and opening to timer When;Over-pressed signal is continuing for the second over-pressed signal in the time of current timer is more than or equal to the previous over-pressed signal period Time and when now over-pressed signal is the second over-pressed signal, control energy-storage module gives LED statements based on collusion electricity;Afterwards in over-pressed signal When being changed into the first over-pressed signal, when control energy-storage module stops to LED statements based on collusion electricity and stops timer, given by rectification module The control subelement of LED statements based on collusion electricity;
The input for controlling subelement for control of discharge unit input, the outfan of connecting line voltage detection unit; The outfan for controlling subelement is the outfan of control of discharge unit, connects the control end of energy-storage module;Control Unit is also connected with the timer.
4. the LED controllable silicons phase controlled light modulator according to Claims 2 or 3 eliminates the circuit of stroboscopic, it is characterised in that The line voltage detector unit includes first resistor, second resistance, comparator and power supply;One end of the first resistor is line electricity The input of pressure detector unit, connects the outfan of rectification module and the input of energy-storage module;The first resistor it is another The normal phase input end of end connection comparator is simultaneously grounded by second resistance, and the positive pole of the power supply connects the anti-phase defeated of comparator Enter end, the minus earth of the power supply, the outfan of the comparator is the outfan of line voltage detector unit, put described in connection The input of electric control unit.
5. the LED controllable silicons phase controlled light modulator according to Claims 2 or 3 eliminates the circuit of stroboscopic, it is characterised in that The energy-storage module includes switch, the first diode, the second diode and the energy-storage units for energy storage;First diode The just extremely input of energy-storage module, connect outfan, the input of line voltage detector unit and the two or two of rectification module The positive pole of pole pipe;The negative pole of first diode connects the input of energy-storage units, the outfan connection of the energy-storage units One end of the switch;The other end of the switch is the outfan of energy-storage module, connects the negative pole and LED of the second diode The positive pole of string;The control end of the switch is the control end of energy-storage module, connects the outfan of control of discharge unit.
6. LED controllable silicons phase controlled light modulator according to claim 5 eliminates the circuit of stroboscopic, it is characterised in that institute Energy-storage units are stated for electric capacity;One end of the electric capacity is the input of energy-storage units, connects the negative pole of the first diode;The electricity The other end of appearance is the outfan of energy-storage units, connects one end of the switch.
7. a kind of LED controllable silicons phase controlled light modulator, it is characterised in that include as described in claim 1-6 any one LED controllable silicons phase controlled light modulator eliminates the circuit of stroboscopic.
CN201621211916.2U 2016-11-10 2016-11-10 LED silicon controlled rectifier phase control dimmer and eliminate stroboscopic circuit thereof Active CN206164925U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106488611A (en) * 2016-11-10 2017-03-08 深圳市晟碟半导体有限公司 The circuit of LED controllable silicon phase controlled light modulator and its elimination stroboscopic, method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106488611A (en) * 2016-11-10 2017-03-08 深圳市晟碟半导体有限公司 The circuit of LED controllable silicon phase controlled light modulator and its elimination stroboscopic, method
CN106488611B (en) * 2016-11-10 2018-04-06 深圳市晟碟半导体有限公司 The circuit of LED controllable silicons phase controlled light modulator and its elimination stroboscopic, method

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