CN106231724B - A kind of LED is without stroboscopic adjusting control circuit - Google Patents
A kind of LED is without stroboscopic adjusting control circuit Download PDFInfo
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- CN106231724B CN106231724B CN201610623605.5A CN201610623605A CN106231724B CN 106231724 B CN106231724 B CN 106231724B CN 201610623605 A CN201610623605 A CN 201610623605A CN 106231724 B CN106231724 B CN 106231724B
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- 238000012545 processing Methods 0.000 claims abstract description 66
- 239000003990 capacitor Substances 0.000 claims abstract description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 33
- 239000010703 silicon Substances 0.000 claims abstract description 33
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 98
- 230000005611 electricity Effects 0.000 claims description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 29
- 230000033228 biological regulation Effects 0.000 description 4
- 210000003205 muscle Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007600 charging Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The invention provides a kind of LED without stroboscopic adjusting control circuit, mainly including LED light source, controllable silicon dimmer, rectification processing module, the first LED constant current controller processing module, the second LED constant current controller processing module, electrolytic capacitor processing module, the first dimming controlling module.Wherein, first dimming controlling module flows through the electric current of LED light source according to voltage-regulation, and the constant current hold ensured in LED light source does not change and changed with the voltage waveform at LED light source both ends, dodges problem so as to overcome lamp present in prior art.
Description
Technical field
The present invention relates to LED lamp field, more particularly to a kind of LED is without stroboscopic adjusting control circuit.
Background technology
The appearance of LED, the electric power required for illumination is greatly reduced, the LED of same wattage, required electric power is only white
The 1/10 of vehement lamp, while LED lamp has the advantages that long lifespan, environmental protection, non-maintaining, and controllable silicon dimmer be widely used in it is white
The traditional lighting such as vehement lamp market, is simply easily available for consumer use, and meets the use habit of people, if LED is wanted to take
The position of the traditional lighting light fixture such as incandescent lamp for controllable silicon light modulation, it is necessary to and controllable silicon dimmer is compatible.
LED thyristor regulatings light control circuit in the market destroys the waveform of sine wave when being dimmed, and causes
There are various problems in LED.Specifically, the angle of flow of the thyristor regulating light control circuit because controlling controllable silicon, can make voltage waveform
It is changed into irregular sine wave, and the thermal inertia of incandescent lamp make it that human eye does not see this irregular caused vibration at all, but
It is that will produce audio-frequency noise and flicker for LED driving power, causes the LED in the case where switching switching state that lamp occurs
The problem of sudden strain of a muscle, power factor (PF) value of circuit is also reduced, and the angle of flow more hour power factor value is lower.
The content of the invention
In view of the above problems, the invention provides a kind of LED without stroboscopic adjusting control circuit, to avoid LED from lamp occur
The problem of sudden strain of a muscle, and the circuit has High Power Factor, it is easy to accomplish control to adjust, simple in construction, required cost is relatively low.
In order to solve the above-mentioned technical problem, the application adopts the following technical scheme that：
A kind of LED without stroboscopic adjusting control circuit, including：LED light source, controllable silicon dimmer, rectification processing module, first
LED constant current controller processing module, the second LED constant current controller processing module, electrolytic capacitor processing module, and the first tune
Photocontrol module；Wherein, the controllable silicon dimmer is used for the brightness for adjusting LED light source；First dimming controlling module, use
The electric current that the LED light source is flowed through when ensureing that the LED light source cathode voltage waveform changes is steady state value.
Preferably, the rectification processing module, is connected by the controllable silicon dimmer with external power supply, for input
External power supply carries out rectification；
The first LED constant current controller processing module, is connected with the rectification processing module, for providing described in maintenance
Anode forward current needed for controllable silicon dimmer conducting；
The second LED constant current controller processing module, adjusted with the electrolytic capacitor processing module and described first
Photocontrol module is connected, for providing constant current driving for the LED light source；
The electrolytic capacitor processing module, the combination of the LED light source and the first dimming controlling module are electrolysed electricity with it
Container is in parallel, when being less than the conduction voltage drop of LED light source for the busbar voltage after rectification, is powered to the LED light source；
First dimming controlling module, its first end and the LED light are source-series, its second end and the electrochemical capacitor
The negative pole of device is connected, for controlling the LED light ource electric current constant.
Preferably, first dimming controlling module include the first light adjusting controller, the second electric capacity, the 3rd sampling resistor,
4th sampling resistor and the 5th sampling resistor, the 3rd sampling resistor and the 4th sampling resistor series connection, the described 3rd adopts
Sample resistance one end connects the first end of first light adjusting controller, the connection of the 3rd sampling resistor and the 4th sampling resistor
The three-terminal link of point and first light adjusting controller, other end connection the first light modulation control of the 4th sampling resistor
Second end of device processed；Second electric capacity is in parallel with the 4th sampling resistor；When the end of the first light adjusting controller the 3rd
When voltage is less than the first setting value, the electric current of the first light adjusting controller first end and the voltage of its first end are flowed through into corresponding
Relation, when the voltage at the end of the first light adjusting controller the 3rd is more than or equal to the first setting value, flow through the first light modulation control
The electric current of device first end processed is the first steady state value；Described 5th sampling resistor one end connects first light adjusting controller the 4th
End, the other end connect the end of the first light adjusting controller second, and its resistance size determines the size of first steady state value.
Preferably, the resistance of the 4th sampling resistor is much smaller than the resistance of the 3rd sampling resistor；Described 4th adopts
Sample resistance is used to ensure that the voltage at the end of the first light adjusting controller the 3rd to be the second steady state value with second electric capacity.
Preferably, the electrolytic capacitor processing module specifically includes electrolytic capacitor and commutation diode, the rectification
The anode of diode connects the positive output end of the rectification processing module, and the negative electrode of the commutation diode connects the electrolysis
The anode of the positive pole of capacitor and the LED light source.
Preferably, the first LED constant current controller processing module specifically includes：First LED constant current controller and first
Sampling resistor, the second LED constant current controller processing module specifically include：Second LED constant current controller and the second sampling electricity
Resistance；Positive output end and the commutation diode of the described first LED constant current controller one end with the rectification processing module
Anode be connected, other end ground connection, its control terminal A passes through first sampling resistor and second sampling resistor and is grounded, institute
State and be connected between the first sampling resistor and second sampling resistor by B points；One end of the second LED constant current controller with
Second end of the negative pole of the electrolytic capacitor and the first dimming controlling module is connected, and other end ground connection, its control terminal D passes through the
Two resistance eutral groundings.
A kind of LED without stroboscopic adjusting control circuit, including：LED light source, rectification processing module, controllable silicon dimmer, first
LED constant current controller, the second LED constant current controller, electrolytic capacitor, commutation diode, the first sampling resistor, the second sampling electricity
Resistance, the first light adjusting controller；Wherein, the controllable silicon dimmer is used for the brightness for adjusting LED light source；First brightness adjustment control
Device, the electric current of the LED light source is flowed through for adjusting, ensure to flow through in the voltage waveform change of the LED light source input
The electric current of the LED light source is steady state value.
Preferably, the rectification processing module is connected by the controllable silicon dimmer with external power supply, at the rectification
The positive output end for managing module connects one end of the first LED constant current controller and the anode of the commutation diode, described
The negative output end of rectification processing module is grounded after being connected with the other end of the first LED constant current controller, the first LED
The control terminal A of constant-current controller is grounded by the first sampling resistor and the second sampling resistor, first sampling resistor and described
Second sampling resistor is connected by B points, and the negative electrode of the commutation diode connects the anode of the LED light source, while described whole
The negative electrode of stream diode also connects the positive pole of the electrolytic capacitor, and the negative pole of the electrolytic capacitor connects the 2nd LED
One end of constant-current controller, the other end ground connection of the second LED constant current controller, while the second LED constant current controller
Control terminal D be grounded by second sampling resistor；The LED light source is connected with first light adjusting controller, and it is connected
Combination is in parallel with the electrolytic capacitor；
Wherein, when the first LED constant current controller control terminal A points voltage is more than B point voltages, the first LED is permanent
Stream controller conducting maintains the controllable silicon dimmer to turn on required anode forward current to provide；Bus electricity after rectification
When pressure is less than the conduction voltage drop of the LED light source, the electrolytic capacitor is powered to the LED light source；The first light modulation control
Device processed flows through the electric current of its first end according to the voltage-regulation of its first end, i.e. the electric current of the LED light source is flowed through in regulation.
Preferably, the control circuit also includes：Second electric capacity, the 3rd sampling resistor, the 4th sampling resistor and the 5th are adopted
Sample resistance, it is in parallel with first light adjusting controller after the 3rd sampling resistor and the 4th the sampling resistor series connection, the described 3rd
The tie point of sampling resistor and the 4th sampling resistor connects the control terminal F of first light adjusting controller simultaneously；When described
When first light adjusting controller control terminal F voltage is less than the first setting value, electric current and the institute of first light adjusting controller are flowed through
The cathode voltage of LED light source is stated into corresponding relation, when the voltage of the first light adjusting controller control terminal F is set more than or equal to first
During definite value, the electric current for flowing through first light adjusting controller is the first steady state value；Second electric capacity and the described 4th sampling electricity
Resistance is in parallel；Described 5th sampling resistor one end connects the first light adjusting controller current settings end, other end connection described the
One the second end of light adjusting controller, its resistance size determine the size of first steady state value；3rd sampling resistor and the 4th sampling
Resistance and the second electric capacity are used for the voltage stabilization for ensureing the first light adjusting controller control terminal F, flow through the LED so as to realize
The electric current of light source is stable.
Preferably, the resistance of the 3rd sampling resistor is much larger than the resistance of the 4th sampling resistor.
As fully visible, the invention provides a kind of LED without stroboscopic adjusting control circuit, mainly including LED light source, controllable silicon
Light modulator, rectification processing module, the first LED constant current controller processing module, the second LED constant current controller processing module, electrolysis
Capacitor processing module, the first dimming controlling module.Wherein, first dimming controlling module flows through according to voltage change regulation
The electric current of LED light source, the stabilization of its control terminal voltage, which determines, flows through the constant of LED light ource electric current, so as to overcome existing skill
The variety of problems such as the sudden strain of a muscle of lamp present in art.
Brief description of the drawings
Accompanying drawing 1 is circuit structure diagrams of the LED without stroboscopic adjusting control circuit in one embodiment of the invention；
Accompanying drawing 2 is the volt-ampere characteristic curve figure of dimming controlling module in embodiment described in accompanying drawing 1；
Accompanying drawing 3 is the oscillogram of G points voltage, K point voltages and LED string electric current in embodiment described in accompanying drawing 1；
Accompanying drawing 4 is circuit structure diagrams of the LED without stroboscopic adjusting control circuit in another embodiment of the present invention.
Embodiment
In the prior art, because LED light source just has electric current when voltage is more than conducting voltage, when the voltage at its both ends is less than
No current passes through during conducting voltage；The size of the angle of flow influences smaller for incandescent lamp in controllable silicon LED adjusting control circuit
It is thus indifferent, but audio-frequency noise and flicker will be produced for LED driving power, causes the LED lamp to go out
The problem of existing lamp dodges, also reduce power factor (PF) value of circuit.
In order to solve the above problems, core of the invention is LED without stroboscopic adjusting control circuit, and accompanying drawing 1 is the present invention
Circuit structure diagrams of the LED without stroboscopic adjusting control circuit in one embodiment, the LED mainly include without stroboscopic adjusting control circuit
LED light source, controllable silicon dimmer, rectification processing module, the first LED constant current controller processing module, the second LED constant current controller
Processing module, electrolytic capacitor processing module, the first dimming controlling module.
Above-mentioned modules have its corresponding function in the circuit：The LED light source, for providing LED light source；It is described
Controllable silicon dimmer, for controlling the angle of flow size of external power supply to adjust the brightness of LED light source；The rectification handles mould
Block, it is connected by the controllable silicon dimmer with external power supply, for carrying out rectification to input external power supply；First LED
Constant-current controller processing module, it is connected with the rectification processing module, the controllable silicon dimmer conducting institute is maintained for providing
The anode forward current needed；The second LED constant current controller processing module, with the electrolytic capacitor processing module and institute
State the first dimming controlling module to be connected, for providing constant current driving for the LED light source；The electrolytic capacitor processing module bag
Include electrolytic capacitor, the combination of the LED light source and first dimming controlling module is in parallel with the electrolytic capacitor, for
When busbar voltage after rectification is less than the conduction voltage drop of LED light source, powered to the LED light source；The first brightness adjustment control mould
Block includes light adjusting controller, and its first end and the LED light are source-series, and its second end is connected with the negative pole of the electrolytic capacitor
Connect, first dimming controlling module is used to control the electric current for flowing through the LED light source for not with the constant of voltage waveform change
Value.
In a particular embodiment, the concrete composition of above-mentioned modules and electrical connection can further be designed,
Specifically, the LED light source is LED string structure, the electrolytic capacitor processing module specifically includes electrolytic capacitor and whole
Diode is flowed, the anode of the commutation diode connects the positive output end of the rectification processing module, the commutation diode
Negative electrode connect the positive pole of the electrolytic capacitor and the anode of the LED light source.The first LED constant current controller processing
Module specifically includes：First LED constant current controller and the first sampling resistor.The second LED constant current controller processing module tool
Body includes：Second LED constant current controller and the second sampling resistor.At described first LED constant current controller one end and the rectification
The anode of the positive output end and the commutation diode of managing module is connected, other end ground connection, meanwhile, the first LED is permanent
The control terminal A of stream controller is grounded by first sampling resistor and second sampling resistor, first sampling resistor
It is connected between second sampling resistor by B points, one end and the electrolytic capacitor of the second LED constant current controller
Negative pole and the second end of the first dimming controlling module be connected, other end ground connection, while the control of the second LED constant current controller
End D processed is grounded by the second sampling resistor.
Wherein, power supply control work of the LED without stroboscopic adjusting control circuit mainly has：Pass through controllable silicon dimmer control
The angle of flow size of external power supply processed is to adjust the brightness of LED string；By rectification processing module to inputting external power supply
Carry out rectification；The anode for maintaining the controllable silicon dimmer conducting required is provided by the first LED constant current controller processing module
Forward current；Constant current is provided by the second LED constant current controller processing module for the LED string to drive；Pass through electrochemical capacitor
Device processing module, when the busbar voltage after rectification is less than the conduction voltage drop of LED string, acted in collusion to make each other's confessions to the LED electric；It is and logical
The first dimming controlling module is crossed, controls the electric current of the LED string constant.
First dimming controlling module is one of emphasis of the present invention, and it includes the light adjusting controller with control terminal,
The voltage of its control terminal determines its electric current flowed through, and its volt-ampere characteristic curve in dimming controlling module as shown in Fig. 2 control
The voltage at end start from scratch increase when, the electric current for flowing through dimming controlling module also increases accordingly, when control terminal voltage increase
During to more than or equal to setting value V0, the electric current for flowing through dimming controlling module reaches steady state value I0, the hereafter voltage increase of control terminal
The electric current for flowing through dimming controlling module no longer changes, as long as thus ensuring the voltage constant of dimming controlling module control terminal just
It can ensure that the electric current for flowing through dimming controlling module is constant, that is, the electric current for flowing through the LED string is constant.
First dimming controlling module described in this circuit flows through the electricity of LED string according to the regulation of the voltage change of control terminal
Stream, it is constant to flow through the electric current of LED string when the voltage constant of control terminal, is dodged etc. so as to overcome lamp present in prior art
Variety of problems.
Specific work process of the LED without stroboscopic adjusting control circuit is as follows：
As shown in figure 3, when power switch closes, within the T1 cycles, regulation controllable silicon dimmer BG1 is led in t1 time triggers
Logical, when supply voltage increases, electrolytic capacitor C1 is charged by bus, flows through LED light source and electrolytic capacitor C1's
Electric current sum is controlled by LED constant current controller 2, and its size is equal to VD/R2, and wherein VD represents the voltage of D points,；Work as electrochemical capacitor
When voltage on device C1 is more than busbar voltage, electrolytic capacitor C1 is discharged by LED string, light adjusting controller 3；No matter it is being electrolysed
During capacitor C1 chargings or electric discharge, the electric current for flowing through LED string is controlled by light adjusting controller 3；Meanwhile LED constant current
Controller 1 detects control terminal A point voltages, and when A points voltage is less than or equal to D point voltages, LED constant current controller 1 turns off, and LED is permanent
Stream controller 2 turns on, and when A points voltage is more than D point voltages, LED constant current controller 1 turns on, and LED constant current controller 2 turns off,
T3 moment, controllable silicon dimmer BG1 shut-offs, LED constant current controller 1 are provided for maintaining controllable silicon dimmer BG1 conductings must
The anode forward current needed；Waveform 101 represents the voltage waveform of commutation diode D1 positive poles in figure, and waveform 102 represents rectification two
The voltage waveform of pole pipe D1 negative poles, electrolytic capacitor C1 positive poles.
In addition, corresponding design also has been carried out to first dimming controlling module in another embodiment in the present invention,
As shown in Figure 4.In this embodiment, first dimming controlling module 1 include the first light adjusting controller 3, the second electric capacity C2,
3rd sampling resistor R3, the 4th sampling resistor R4 and the 5th sampling resistor R5, the sampling electricity of the 3rd sampling resistor R3 and the 4th
Hinder, the threeth sampling resistor R3 and fourth in parallel with the second end with the first end of first light adjusting controller 3 after R4 connects
Sampling resistor R4 tie point connects the control terminal F of first light adjusting controller 3 simultaneously；The second electric capacity C2 and described the
Four sampling resistor R4 are in parallel, and its one end connection control terminal F, the other end connects the second end of the first light adjusting controller 3；5th sampling
Resistance R4 one end connects the 4th end of the first light adjusting controller 3, the second end of the first light adjusting controller of the other end 3；Control terminal F's
Voltage is with flowing through the relation of the first end of the first light adjusting controller 3 and the electric current at the second end as shown in Fig. 2 control terminal F voltage
When increasing by zero, flow through the first end of the first light adjusting controller 3 and gradually increase with the electric current at the second end, when control terminal F's
When voltage is increased above being equal to setting value V0, flows through the first end of the first light adjusting controller 3 and reach permanent with the electric current at the second end
Definite value I0, subsequent control terminal F voltage increase and flow through the first end of the first light adjusting controller 3 and keep permanent with the electric current at the second end
Definite value I0 is constant, and steady state value I0 size is determined by the 5th sampling resistor R5 size；As seen from Figure 2, as long as keeping
Control terminal F voltage constant, flow through the first light adjusting controller 3 first end and the second end electric current also just it is constant, that is, flow through LED
The electric current of lamp string is constant.
The sampling resistor R3 of reasonable set the 3rd and the 4th sampling resistor R4 resistance, make the 3rd sampling resistor R3 resistance remote
More than the voltage very little of the 4th sampling resistor R4 resistance, now the control terminal F of the first light adjusting controller 3, such as less than 10V, by
In the second electric capacity C2 presence, then control terminal F voltage ripple is not enough to cause and flows through the first light adjusting controller 3 with regard to very little
First end and the second end curent change, so as to realize that the electric current for flowing through LED string is constant.
The second electric capacity of reasonable set C2 capacitance, reduction electrolytic capacitor C1 that can be suitably capacitance, so as to reduce
Electrolytic capacitor C1 volumes, reduce cost.
In summary, the invention provides a kind of LED without stroboscopic adjusting control circuit, mainly including LED light source, controllable silicon
Light modulator, rectification processing module, the first LED constant current controller processing module, the second LED constant current controller processing module, electrolysis
Capacitor processing module, the first dimming controlling module.Wherein, the electricity of LED light source is flowed through in the first dimming controlling module control
Stream, ensure that the electric current of LED light source does not keep constant with voltage waveform change, so as to overcome sudden strain of a muscle of lamp present in prior art etc.
Variety of problems.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to above-described embodiment
The present invention is described in detail, it will be understood by those within the art that；It still can be to above-mentioned each implementation
Technical scheme described in example is modified, or carries out equivalent substitute to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a kind of LED is without stroboscopic adjusting control circuit, including：
LED light source, controllable silicon dimmer, rectification processing module, the first LED constant current controller processing module, the second LED constant current control
Device processing module processed, electrolytic capacitor processing module, and the first dimming controlling module；Wherein：
The controllable silicon dimmer is used for the brightness for adjusting LED light source；
The rectification processing module, is connected by the controllable silicon dimmer with external power supply, for entering to input external power supply
Row rectification；
The first LED constant current controller processing module, is connected with the rectification processing module, remains described controllable for providing
Anode forward current needed for silicon dimmer conduction；
The second LED constant current controller processing module, controlled with the electrolytic capacitor processing module and first light modulation
Molding block is connected, for providing constant current driving for the LED light source；
The electrolytic capacitor processing module, the combination of the LED light source and the first dimming controlling module and its electrolytic capacitor
Parallel connection, when being less than the conduction voltage drop of LED light source for the busbar voltage after rectification, powered to the LED light source；
First dimming controlling module, its first end and the LED light are source-series, its second end and the electrolytic capacitor
Negative pole is connected, for controlling the LED light ource electric current not keep constant with voltage waveform change.
2. LED according to claim 1 is without stroboscopic adjusting control circuit, it is characterised in that：The first brightness adjustment control mould
Block includes the first light adjusting controller, the second electric capacity, the 3rd sampling resistor, the 4th sampling resistor and the 5th sampling resistor, and described
Three sampling resistors and the 4th sampling resistor series connection, described 3rd sampling resistor one end connect first light adjusting controller
First end, the tie point of the 3rd sampling resistor and the 4th sampling resistor connect with the 3rd end of first light adjusting controller
Connect, the other end of the 4th sampling resistor connects the second end of first light adjusting controller；Second electric capacity with it is described
4th sampling resistor is in parallel；When the voltage at the end of the first light adjusting controller the 3rd is less than the first setting value, described is flowed through
The electric current of one light adjusting controller first end and the voltage of its first end are into corresponding relation, when the end of the first light adjusting controller the 3rd
Voltage when being more than or equal to the first setting value, the electric current for flowing through the first light adjusting controller first end is the first steady state value；Institute
State the 5th sampling resistor one end and connect the end of the first light adjusting controller the 4th, the other end connects first light adjusting controller the
Two ends, its resistance size determine the size of first steady state value.
3. LED according to claim 2 is without stroboscopic adjusting control circuit, it is characterised in that the 4th sampling resistor
Resistance is much smaller than the resistance of the 3rd sampling resistor；4th sampling resistor and second electric capacity are used to ensureing described the
The voltage at the end of one light adjusting controller the 3rd is the second steady state value.
4. LED according to claim 1 is without stroboscopic adjusting control circuit, it is characterised in that the electrolytic capacitor processing
Module specifically includes electrolytic capacitor and commutation diode, and the anode of the commutation diode connects the rectification processing module
Positive output end, the negative electrode of the commutation diode connect the positive pole of the electrolytic capacitor and the anode of the LED light source.
5. LED according to claim 4 is without stroboscopic adjusting control circuit, it is characterised in that the first LED constant current control
Device processing module specifically includes：First LED constant current controller and the first sampling resistor, the second LED constant current controller processing
Module specifically includes：Second LED constant current controller and the second sampling resistor；Described first LED constant current controller one end with it is described
The anode of the positive output end of rectification processing module and the commutation diode is connected, and other end ground connection, its control terminal A passes through
First sampling resistor and second sampling resistor ground connection, between first sampling resistor and second sampling resistor
It is connected by B points；One end of the second LED constant current controller and the negative pole of the electrolytic capacitor and the first brightness adjustment control mould
Second end of block is connected, and other end ground connection, its control terminal D is grounded by second resistance.
6. a kind of LED is without stroboscopic adjusting control circuit, including：
LED light source, rectification processing module, controllable silicon dimmer, the first LED constant current controller, the second LED constant current controller, electricity
Electrolysis condenser, commutation diode, the first sampling resistor, the second sampling resistor, the first light adjusting controller；Wherein, the controllable silicon
Light modulator is used for the brightness for adjusting LED light source；The rectification processing module passes through the controllable silicon dimmer and external power supply phase
Even, the positive output end of the rectification processing module connects one end and the pole of the rectification two of the first LED constant current controller
The anode of pipe, the negative output end of the rectification processing module is connected with the other end of the first LED constant current controller to be followed by
Ground, the control terminal A of the first LED constant current controller are grounded by the first sampling resistor and the second sampling resistor, and described first
Sampling resistor is connected with second sampling resistor by B points, and the negative electrode of the commutation diode connects the sun of the LED light source
Pole, while the negative electrode of the commutation diode also connects the positive pole of the electrolytic capacitor, the negative pole of the electrolytic capacitor connects
One end of the second LED constant current controller is connect, the other end of the second LED constant current controller is grounded, while described second
The control terminal D of LED constant current controller is grounded by second sampling resistor；The LED light source and first brightness adjustment control
Device is connected, and its tandem compound is in parallel with the electrolytic capacitor；Wherein, when the first LED constant current controller control terminal A points electricity
When pressure is more than B point voltages, the first LED constant current controller conducting is maintained needed for the controllable silicon dimmer conducting with providing
Anode forward current；When the busbar voltage after rectification is less than the conduction voltage drop of the LED light source, the electrolytic capacitor is to institute
State LED light source power supply；First light adjusting controller flows through the electric current of its first end according to the voltage-regulation of its first end, that is, adjusts
Throttled the electric current of the LED light source, ensures to flow through the LED light in the voltage waveform change of the LED light source input
The electric current in source is steady state value.
7. LED according to claim 6 is without stroboscopic adjusting control circuit, it is characterised in that the control circuit also includes：
Second electric capacity, the 3rd sampling resistor, the 4th sampling resistor and the 5th sampling resistor, the 3rd sampling resistor and the 4th sampling electricity
In parallel with first light adjusting controller after resistance series connection, the tie point of the 3rd sampling resistor and the 4th sampling resistor is same
When connect the control terminal F of first light adjusting controller；When the voltage of the first light adjusting controller control terminal F is set less than first
During definite value, the electric current of first light adjusting controller and the cathode voltage of the LED light source are flowed through into corresponding relation, when described the
When one light adjusting controller control terminal F voltage is more than or equal to the first setting value, the electric current for flowing through first light adjusting controller is
First steady state value；Second electric capacity is in parallel with the 4th sampling resistor；Described 5th sampling resistor one end connection described the
One light adjusting controller current settings end, the other end connect the end of the first light adjusting controller second, described in its resistance size determines
The size of first steady state value；3rd sampling resistor and the 4th sampling resistor and the second electric capacity are used to ensure first brightness adjustment control
Device control terminal F voltage stabilization, so as to realize that the electric current for flowing through the LED light source is stable.
8. LED according to claim 7 is without stroboscopic adjusting control circuit, it is characterised in that the 3rd sampling resistor
Resistance is much larger than the resistance of the 4th sampling resistor.
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| CN109831844B (en) * | 2018-12-18 | 2024-03-22 | 陕西亚成微电子股份有限公司 | Stroboflash-free high-power-factor LED driving method and circuit |
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| CN116723599B (en) * | 2023-08-09 | 2023-10-27 | 中国计量科学研究院 | Method and device for constructing a stroboscopic standard light source with predictable stroboscopic characteristics |
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Denomination of invention: A LED non stroboscopic dimming control circuit Effective date of registration: 20210203 Granted publication date: 20180316 Pledgee: Xi'an Science and Technology Financial Service Center Co.,Ltd. Pledgor: SHAANXI REACTOR MICROELECTRONICS Co.,Ltd. Registration number: Y2021980001011 |
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