CN109168226A - A kind of LED adjusting method and circuit - Google Patents
A kind of LED adjusting method and circuit Download PDFInfo
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- CN109168226A CN109168226A CN201811249567.7A CN201811249567A CN109168226A CN 109168226 A CN109168226 A CN 109168226A CN 201811249567 A CN201811249567 A CN 201811249567A CN 109168226 A CN109168226 A CN 109168226A
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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]
Abstract
The invention discloses a kind of LED adjusting methods, including current distributing controller to export first control signal respectively to electric current value controller, exports the second control signal of different timing to the switching tube of the corresponding concatenation of each current rectifying and wave filtering circuit；Wherein, first control signal includes the copped wave time with dead time and the two is alternately present；It is target value that electric current value controller controls source of high frequency current and export high-frequency current in the copped wave time and adjust its amplitude according to first control signal；The amplitude that source of high frequency current is controlled in dead time output high-frequency current is zero；Each switching tube receives second control signal on or off, so that current rectifying and wave filtering circuit is connected in the copped wave time and is turned off each current rectifying and wave filtering circuit in dead time all the way.This method may be implemented to control Multi-path LED load by same adjusting circuit, can be effectively reduced control cost, meet control needs；The invention also discloses a kind of LED to adjust circuit, equally has above-mentioned technique effect.
Description
Technical field
The present invention relates to LED control field, in particular to a kind of LED adjusting method；Further relate to a kind of LED adjusting circuit.
Background technique
LED as a kind of novel illuminating device, it is high with its light efficiency, the service life is long, pollution-free the features such as in lighting area quilt
It is widely applied.Wherein, it for some applications for needing to adjust LED parameter, needs to adjust LED using LED driver
Section.However, the mode of control LED is to be controlled respectively each paths of LEDs by multiple LED drivers at present, each LED driving
Device is responsible for a paths of LEDs, to cause to control higher cost.
Therefore, how a kind of LED regulation scheme is provided, may be implemented through same adjusting circuit control Multi-path LED load,
And the electric current for controlling the load of each paths of LEDs reaches target value, reduces control cost, meet control and need be those skilled in the art urgently
Technical problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of LED adjusting method, it may be implemented to adjust circuit by same LED to multichannel
LED load is controlled, and the electric current that can control each paths of LEDs load reaches target value, and control cost is effectively reduced, meets control
System needs；It is a further object of the present invention to provide a kind of LED to adjust circuit, equally has above-mentioned technique effect.
In order to solve the above technical problems, the present invention provides a kind of LED adjusting methods, comprising:
Current distributing controller exports first control signal to electric current value controller respectively, exports the second control of different timing
Signal processed corresponds to the switching tube of concatenation to each current rectifying and wave filtering circuit；Wherein, the first control signal includes the copped wave time and dead
Area's time, and the copped wave time is alternately present with the dead time；
The electric current value controller controls source of high frequency current according to the first control signal and exports in the copped wave time
High-frequency current, and the amplitude for adjusting the high-frequency current is target value；It is defeated in the dead time to control the source of high frequency current
The amplitude of the high-frequency current is zero out；
Each switching tube receives the second control signal on or off, so that the current rectifying and wave filtering circuit exists all the way
The preset period of time conducting, having amplitude is that the high-frequency current of the target value passes through；And make each current rectifying and wave filtering circuit
It is turned off in the dead time.
Optionally, the first control signal is within a control period comprising a pair of with each current rectifying and wave filtering circuit one
The multiple copped wave times answered, and the dead time equal with the current rectifying and wave filtering circuit quantity；Wherein, each described
The copped wave time successively occurs according to the conducting order of the corresponding current rectifying and wave filtering circuit.
Optionally, each switching tube is respectively according to the second control signal according to the rectification of corresponding concatenation
The conducting order of filter circuit recycles conducting.
Optionally, earlier than institute at the beginning of the control signal for driving the switching tube to be connected in the second control signal
It states in first control signal at the beginning of the copped wave time, evening finish time of signal is controlled described in the second control signal
The finish time of copped wave time described in the first control signal.
Optionally, it is target value that the electric current value controller, which adjusts the amplitude of the high-frequency current, comprising:
Acquire the current value of the source of high frequency current medium-high frequency switching tube, and according to the current value of the HF switch pipe and
The amplitude of the high-frequency current is calculated in the duty cycle information of the HF switch pipe；
Compare the amplitude of the high-frequency current and the size of the target value, and the high-frequency electrical is adjusted according to comparison result
The amplitude of stream is the target value.
Optionally, further includes:
Adjustment signal adjusts the amplitude and/or described of the high-frequency current to the current distributing controller based on the received
One control signal, to adjust the current value of the current rectifying and wave filtering circuit.
Optionally, adjustment signal adjusts the amplitude of the high-frequency current to the current distributing controller based on the received, packet
It includes:
The current distributing controller sends modification instruction to the electric current value controller, to modify the target value, adjusts
Save the current value of the current rectifying and wave filtering circuit.
Optionally, adjustment signal adjusts the first control signal to adjust to the current distributing controller based on the received
The current value of the current rectifying and wave filtering circuit, comprising:
The current distributing controller is by adjusting the width of copped wave time described in the first control signal and/or leading to
Overregulate the current value of current rectifying and wave filtering circuit described in the width adjusting of dead time described in the first control signal.
In order to solve the above technical problems, the present invention also provides a kind of LED to adjust circuit, comprising: source of high frequency current, electric current
Value controller, current distributing controller, the current rectifying and wave filtering circuit of preset quantity and each current rectifying and wave filtering circuit correspond to concatenated
Switching tube；Wherein, the current rectifying and wave filtering circuit of the preset quantity is parallel with one another, and the output end phase with the source of high frequency current
Even；The current distributing controller is connected with the input terminal of the electric current value controller, and electric with each rectifying and wave-filtering respectively
The control terminal that road corresponds to the concatenated switching tube is connected；The output end of the electric current value controller and the source of high frequency current
The control terminal of HF switch pipe is connected.
The current distributing controller, for output first control signal respectively to electric current value controller, when exporting different
The second control signal of sequence corresponds to the switching tube of concatenation to each current rectifying and wave filtering circuit；Wherein, the first control signal includes cutting
Wave time and dead time, and the copped wave time is alternately present with the dead time；
The electric current value controller, for controlling the source of high frequency current in the copped wave according to the first control signal
Time exports high-frequency current, and the amplitude for adjusting the high-frequency current is target value；The source of high frequency current is controlled described dead
The amplitude that area exports the high-frequency current time is zero；
The switching tube, for receiving the second control signal on or off, so that the rectifying and wave-filtering electricity all the way
Road is connected in the copped wave time, and having amplitude is that the high-frequency current of the target value passes through；And make each rectifying and wave-filtering
Circuit is turned off in the dead time.
Optionally, the source of high frequency current includes:
HF switch pipe, transformer and sampling resistor；Wherein, the primary side winding of the transformer and the HF switch
Pipe and sampling resistor series connection, the vice-side winding of the transformer is coupled with the primary side winding and Same Name of Ends is opposite.
LED adjusting method provided by the present invention, comprising: current distributing controller exports first control signal to electricity respectively
Flow valuve controller exports the second control signal of different timing to the switching tube of the corresponding concatenation of each current rectifying and wave filtering circuit；Wherein, institute
Stating first control signal includes copped wave time and dead time, and the copped wave time is alternately present with the dead time；Institute
It states electric current value controller and source of high frequency current is controlled in copped wave time output high-frequency current according to the first control signal, and
The amplitude for adjusting the high-frequency current is target value；It controls the source of high frequency current and exports the high-frequency electrical in the dead time
The amplitude of stream is zero；Each switching tube receives the second control signal on or off, so that the rectifying and wave-filtering all the way
Circuit is connected in the preset period of time, and having amplitude is that the high-frequency current of the target value passes through；And make each rectification filter
Wave circuit is turned off in the dead time.
As it can be seen that LED adjusting method provided by the present invention, using current distributing controller to electric current value controller output the
One control signal exports high-frequency current in the copped wave time to control source of high frequency current.In addition, using current distributing controller to
The switching tube of each current rectifying and wave filtering circuit exports the second control signal of different timing, corresponding by controlling each current rectifying and wave filtering circuit
The on state of switching tube makes current rectifying and wave filtering circuit all the way therein in the period conducting of source of high frequency current output electric current, corresponds to
LED load have amplitude be target value high-frequency current pass through.The LED adjusting method believes prime control signal and rear class control
It is number corresponding, i.e., it is first control signal is corresponding with second control signal, at times by the high-frequency current of source of high frequency current output
Each current rectifying and wave filtering circuit is distributed on ground, is realized and is controlled by same LED adjusting circuit the load of each paths of LEDs, and controls
The electric current of each paths of LEDs load reaches target value, effectively reduces control cost and meets control needs.
LED provided by the present invention adjusts circuit, equally has above-mentioned technique effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow diagram of LED adjusting method provided by the embodiment of the present invention；
Fig. 2 is a kind of schematic diagram for controlling signal provided by the embodiment of the present invention；
Fig. 3 is the schematic diagram that another kind provided by the embodiment of the present invention controls signal；
Fig. 4 is a kind of schematic diagram of LED adjusting circuit provided by the embodiment of the present invention；
Fig. 5 is the schematic diagram that another kind LED provided by the embodiment of the present invention adjusts circuit；
Fig. 6 is the schematic diagram that another LED provided by the embodiment of the present invention adjusts circuit；
Fig. 7 is a kind of schematic diagram of current rectifying and wave filtering circuit provided by the embodiment of the present invention；
Fig. 8 is the schematic diagram that another LED provided by the embodiment of the present invention adjusts circuit；
Fig. 9 is the schematic diagram that another LED provided by the embodiment of the present invention adjusts circuit.
Specific embodiment
Core of the invention is to provide a kind of LED adjusting method, may be implemented to adjust circuit by same LED to multichannel
LED load is controlled, and the electric current that can control each paths of LEDs load reaches target value, and control cost is effectively reduced, meets control
System needs；Another core of the invention is to provide a kind of LED adjusting circuit, equally has above-mentioned technique effect.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the flow diagram of LED adjusting method provided by the embodiment of the present invention, it can with reference to Fig. 1
Know, which includes:
S10: current distributing controller exports first control signal to electric current value controller respectively, exports the of different timing
Two control signals correspond to the switching tube of concatenation to each current rectifying and wave filtering circuit；Wherein, first control signal includes the copped wave time and dead
Area's time, and the copped wave time is alternately present with dead time；
Specifically, current distributing controller exports first control signal to electric current value controller, by controlling current value control
The working condition of device processed realizes the control to source of high frequency current.Wherein, the first control signal be cyclic control signal, one
Controlling the period includes copped wave time and dead time, and the two is alternately present.In dead time, electric current value controller stops work
Make, the amplitude of the high-frequency current of source of high frequency current output is zero；Electric current value controller works normally within the copped wave time, high-frequency electrical
The high-frequency current that stream source output amplitude is not zero.Current distributing controller exports second control signal to each current rectifying and wave filtering circuit pair
The switching tube that should be concatenated, the on state by controlling each switching tube are controlled to whether corresponding current rectifying and wave filtering circuit is connected
Whether system has electric current by controlling corresponding LED load.Wherein, second control signal is current distributing controller
It exports to the general designation of the control signal of each current rectifying and wave filtering circuit, is different from current distributing controller and exports to electric current value controller
First control signal.The quantity of the second control signal of current distributing controller output is equal with the quantity of current rectifying and wave filtering circuit,
And the timing of each second control signal is had nothing in common with each other, and is respectively turned on the purpose of LED load all the way in different periods to realize.
By taking current distributing controller exports two-way second control signal as an example: referring to FIG. 2, Fig. 2 is the embodiment of the present invention
A kind of provided schematic diagram for controlling signal, the C1 in Fig. 2 are that current distributing controller is exported to the first current rectifying and wave filtering circuit
Second control signal, C2 is that current distributing controller is exported to the second control signal of the second current rectifying and wave filtering circuit, and Vc is electricity
Flow point stream controller is exported to the first control signal of electric current value controller, and t1 to t5 is a control in first control signal Vc
Period processed sequentially includes the first copped wave time, the first dead time, the second copped wave time and the second dead time.In t1 to t2
Section, first control signal Vc were in for the first copped wave time, and second control signal C1 is high level, and control is connected to the first rectification
The switching tube of filter circuit is connected, so that the first current rectifying and wave filtering circuit is connected, the LED which is connected is negative
It is loaded with electric current to pass through, and the high-frequency current of source of high frequency current output all flows into first current rectifying and wave filtering circuit.In t2 to the area t3
Between, first control signal Vc is in the first dead time, and the high-frequency current amplitude of source of high frequency current output is zero；Second control letter
Number C1 and second control signal C2 is low level, controls corresponding switching tube shutdown, and each current rectifying and wave filtering circuit is in closing
State, LED load are flowed through without electric current.For t3 to the section t4, first control signal Vc is in the second copped wave time, the second control
Signal C2 is high level, and the second current rectifying and wave filtering circuit of control is connected, and the LED load which is connected has electricity
Stream passes through, and the high-frequency current of source of high frequency current output all flows into second current rectifying and wave filtering circuit.In t4 to the section t5, first
Control signal Vc is in the second dead time, and the high-frequency current amplitude of source of high frequency current output is zero；Second control signal C1 with
Second control signal C2 is low level, controls corresponding switching tube shutdown respectively, and each current rectifying and wave filtering circuit is in closing shape
State, LED load are flowed through without electric current.
In a kind of specific embodiment, first control signal is within a control period comprising electric with each rectifying and wave-filtering
Road multiple copped wave times, and the dead time equal with current rectifying and wave filtering circuit quantity correspondingly；Wherein, each copped wave time
Successively occur according to the conducting order of corresponding current rectifying and wave filtering circuit.
Equally referring to FIG. 2, by taking current rectifying and wave filtering circuit is 2 tunnels as an example: first control signal Vc is within a control period
Comprising 2 copped wave times and 2 dead times, also, there is conducting of the order corresponding to current rectifying and wave filtering circuit in the copped wave time
Order.Specifically, the copped wave time that first control signal Vc occurs first is first via current rectifying and wave filtering circuit corresponding first
Then the copped wave time is the second current rectifying and wave filtering circuit corresponding second copped wave time；And since copped wave time and dead time are
It is alternately present, also includes the first dead time between the first copped wave time and the second copped wave time therefore；When the second dead zone
Between then be located at the second copped wave time after.And so on, when current rectifying and wave filtering circuit is 3 tunnel, a control of first control signal
It include 3 copped wave times and 3 dead times in period processed, equally, each copped wave time is according to corresponding current rectifying and wave filtering circuit
Order is connected to occur, i.e., when each copped wave time of first control signal and the appearance order of dead time are followed successively by the first copped wave
Between, the first dead time, the second copped wave time, the second dead time, third copped wave time and third dead time, and follow according to this
Ring is reciprocal.
Further, optionally, each switching tube is respectively according to second control signal according to the rectifying and wave-filtering of corresponding concatenation
The conducting order of circuit recycles conducting.
Specifically, second control signal acts on auxiliary control signal, it is corresponding whole for being connected when occurring the copped wave time
Flow filter circuit.Therefore, when first control signal the copped wave time occurs according to the order of corresponding current rectifying and wave filtering circuit,
Second control signal also according to the order control switch pipe of corresponding current rectifying and wave filtering circuit, make each switching tube respectively according to
The conducting order of the current rectifying and wave filtering circuit of corresponding concatenation recycles conducting.
Wherein, it can be exported with it at the beginning of the copped wave time in the first control signal of current distributing controller output
Second control signal in the conducting of driving switch pipe control signal at the beginning of copped wave time in identical, first control signal
Finish time in second control signal driving switch pipe be connected the control finish time of signal it is identical, that is, control high-frequency electrical
Current rectifying and wave filtering circuit is connected all the way for control while stream source exports high-frequency current.Or the second control of current distributing controller output
It can also be cut in the first control signal earlier than its output at the beginning of the control signal that driving switch pipe is connected in signal processed
At the beginning of the wave time, the finish time for the control signal that driving switch pipe is connected in second control signal is later than its output
The finish time of copped wave time in first control signal controls current rectifying and wave filtering circuit conducting all the way first, then controls high frequency
Current source exports high-frequency current.
To ensure that the output end of source of high frequency current is not opened a way, optionally, driving switch pipe is led in second control signal
At the beginning of logical control signal earlier than the copped wave time in first control signal at the beginning of, driven in second control signal
The finish time of the control signal of switching tube conducting is later than the finish time of copped wave time in first control signal.
Specifically, referring to FIG. 3, Fig. 3 is the schematic diagram that another kind provided by the embodiment of the present invention controls signal；In conjunction with
Fig. 3 is t2, finish time t3 at the beginning of the copped wave time in the first control signal of current distributing controller output.Electricity
It is t1 at the beginning of the control signal that driving switch pipe is connected in the second control signal of flow point stream controller output, at the end of
Carving is t4.Wherein, t1 is less than t2, i.e., earlier than the at the beginning of the control signal that driving switch pipe is connected in second control signal
In one control signal at the beginning of the copped wave time, t4 is greater than t3, i.e., the control that driving switch pipe is connected in second control signal
The finish time of signal is later than the finish time of copped wave time in first control signal.Then, when source of high frequency current exports high frequency
When electric current, has current rectifying and wave filtering circuit conducting all the way, thus the feelings that the output end for effectively preventing source of high frequency current is opened a way
Condition.The present embodiment is by taking the second control signal of current rectifying and wave filtering circuit all the way therein as an example, it can be appreciated that, the second control letter
In number driving switch pipe be connected control signal at the beginning of earlier than the copped wave time in first control signal at the beginning of
It carves, the finish time of the control signal of driving switch pipe conducting is later than the copped wave time in first control signal in second control signal
Finish time be suitable for each road current rectifying and wave filtering circuit.
S20: electric current value controller controls source of high frequency current according to first control signal and exports high-frequency current in the copped wave time,
And the amplitude for adjusting high-frequency current is target value；The amplitude that source of high frequency current is controlled in dead time output high-frequency current is zero；
Specifically, electric current value controller receives and according to the first control signal that current distributing controller exports, control is high
Frequency current source exports high-frequency current in the copped wave time.And the high-frequency current of source of high frequency current output is adjusted, make its amplitude
Reach target value in one or more switch periods.Wherein, above-mentioned switch periods are source of high frequency current medium-high frequency switching tube
Switch periods.And control source of high frequency current is zero in the amplitude of dead time output high-frequency current.
Wherein, the high-frequency current that electric current value controller can be exported by directly acquiring source of high frequency current, and then according to this
High-frequency current carries out electric current adjustment；Or it can also be by directly acquiring the electric current of source of high frequency current medium-high frequency switching tube, in turn
The high-frequency current of source of high frequency current output is obtained indirectly according to the electric current of the HF switch pipe and electricity is carried out according to the high-frequency current
Stream adjustment.
To keep the power frequency of each paths of LEDs load higher, avoids generating flicker problem, then need current distributing controller
The control period it is shorter, control frequency it is higher, with the control effect being optimal.Therefore, optionally, above-mentioned electric current value controller
It may include: the current value for acquiring source of high frequency current medium-high frequency switching tube that the amplitude for adjusting high-frequency current, which is target value, and according to
The amplitude of high-frequency current is calculated in the current value of HF switch pipe and the duty cycle information of HF switch pipe；Compare high-frequency current
Amplitude and target value size, and according to comparison result adjust high-frequency current amplitude be target value.
Specifically, the amplitude that electric current value controller adjusts high-frequency current is the mode of target value are as follows: electric current in the present embodiment
Value controller directly acquires the current value of HF switch pipe, further according to the current value and high-frequency current of the HF switch pipe
The duty cycle information etc. of switching tube, is calculated the amplitude of the high-frequency current of source of high frequency current reality output, by what is be calculated
The amplitude of high-frequency current is compared with target value, and then is adjusted correspondingly according to comparison result, each or several
The amplitude of control high-frequency current is to target value in switch periods.
S30: each switching tube receives second control signal on or off, so that current rectifying and wave filtering circuit is in preset period of time all the way
Being connected and having amplitude is that the high-frequency current of target value passes through, and is turned off each current rectifying and wave filtering circuit in dead time.
Specifically, after each switching tube receives second control signal, respectively in the driving switch of respective second control signal
Section conducting corresponding to the control signal of pipe conducting.And due to the timing of each second control signal difference, the same period only has
Second control signal is in the control signal that the period is the conducting of driving switch pipe all the way.To which each switching tube is in the same period
There is a conducting, and then there was only each current rectifying and wave filtering circuit and be connected all the way in the copped wave time for corresponding to first control signal, i.e.,
While high-frequency current is derived from copped wave time output high-frequency current, only current rectifying and wave filtering circuit is connected all the way, and corresponding LED is negative
The high-frequency current that amplitude is target value is loaded with to pass through.
In conclusion LED adjusting method provided by the present invention, defeated to electric current value controller using current distributing controller
First control signal out exports high-frequency current in the copped wave time to control source of high frequency current.In addition, being controlled using current distributing
Device exports the second control signal of different timing to the switching tube of each current rectifying and wave filtering circuit, by controlling each current rectifying and wave filtering circuit pair
Current rectifying and wave filtering circuit all the way therein is connected in the period of source of high frequency current output electric current in the on state for the switching tube answered,
Corresponding LED load has electric current to pass through.The LED adjusting method is corresponding with rear class control signal by prime control signal, i.e., will
First control signal is corresponding with second control signal, and the high-frequency current that source of high frequency current exports is distributed to each rectification at times
Filter circuit is realized and is controlled by same LED adjusting circuit the load of each paths of LEDs, and controls the electricity of each paths of LEDs load
Stream reaches target value, effectively reduces control cost and meets control needs.
On the basis of the above embodiments, optionally, which can also include: current distributing controller root
The amplitude and/or first control signal of high-frequency current are adjusted, according to received adjustment signal to adjust the electric current of current rectifying and wave filtering circuit
Value.
Specifically, current distributing controller can also adjust letter based on the received to better meet practical application request
Number adjust high-frequency current amplitude and/or first control signal, to adjust the current value of current rectifying and wave filtering circuit.
In a kind of specific embodiment, adjustment signal adjusts high-frequency electrical to above-mentioned current distributing controller based on the received
The amplitude of stream may include: that current distributing controller is adjusted to the transmission modification instruction of electric current value controller with modifying target current value
Save the current value of current rectifying and wave filtering circuit.
Specifically, can be by sending modification instruction to electric current value controller, to the target set in electric current value controller
Current value is modified, the high-frequency current for exporting electric current value controller by source of high frequency current according to modified target current value
It is adjusted to corresponding amplitude, to realize the adjusting to the current value of current rectifying and wave filtering circuit.
In a kind of specific embodiment, adjustment signal adjusts the first control to above-mentioned current distributing controller based on the received
Signal processed is to adjust the current value of current rectifying and wave filtering circuit, comprising: current distributing controller is cut by adjusting in first control signal
The width of wave time and/or the electric current by adjusting the width adjusting current rectifying and wave filtering circuit of dead time in first control signal
Value.
Specifically, current distributing controller can width to the copped wave time in the first control signal that it is exported and/
Or the width of dead time is adjusted, to change the time and the time without flow through electric current that current rectifying and wave filtering circuit flows through electric current
Ratio, namely change current rectifying and wave filtering circuit flow through the average value of electric current, and then reach adjust current rectifying and wave filtering circuit current value
Purpose.
Adjust circuit the present invention also provides a kind of LED, the LED described below adjust circuit can with it is above-described
LED adjusting method corresponds to each other reference.Referring to FIG. 4, Fig. 4 is a kind of LED adjusting circuit provided by the embodiment of the present invention
Schematic diagram, in conjunction with Fig. 4 it is found that it includes: source of high frequency current 10, electric current value controller 20, current distributing control that the LED, which adjusts circuit,
The corresponding concatenated switching tube K of device 30, the current rectifying and wave filtering circuit 40 of preset quantity and each current rectifying and wave filtering circuit 40；Wherein, present count
The current rectifying and wave filtering circuit 40 of amount is parallel with one another, and is connected with the output end of source of high frequency current 10；Current distributing controller 30 and electricity
The input terminal of flow valuve controller 20 is connected, and the control terminal phase of concatenated switching tube K corresponding with each current rectifying and wave filtering circuit 40 respectively
Even；The output end of electric current value controller 20 is connected with the control terminal of the HF switch pipe S of source of high frequency current 10.
Current distributing controller 30, for output first control signal respectively to electric current value controller 20, when exporting different
The second control signal of sequence corresponds to the switching tube K of concatenation to each current rectifying and wave filtering circuit 40；Wherein, first control signal includes copped wave
Time and dead time, and the copped wave time is alternately present with dead time；
Electric current value controller 20 exports high frequency in the copped wave time for controlling source of high frequency current 10 according to first control signal
Electric current, and the amplitude for adjusting high-frequency current is target value；Source of high frequency current 10 is controlled in the width of dead time output high-frequency current
Value is zero；
Switching tube K, for receiving second control signal on or off, so that current rectifying and wave filtering circuit 40 is in copped wave all the way
Between be connected, have amplitude be target value high-frequency current pass through；And it is turned off each current rectifying and wave filtering circuit 40 in dead time.
Specifically, source of high frequency current 10 connects input voltage and exports high-frequency current, and the high frequency in source of high frequency current 10
The control terminal of switching tube S is connected with electric current value controller 20, which receives the control that electric current value controller 20 exports
Signal conduction or shutdown, and then source of high frequency current 10 is made to export corresponding high-frequency current.For example, it is defeated to receive electric current value controller 20
Pwm pulse signal out, HF switch pipe S are led in the corresponding section of control signal that the driving switch pipe of pwm pulse signal is connected
It is logical.Wherein, the situation different for 10 circuit structure of source of high frequency current, the number of HF switch pipe S allow to have differences.Example
Such as, if source of high frequency current 10 is half-bridge circuit, push-pull circuit, the number of 10 medium-high frequency switching tube S of source of high frequency current is two；
If source of high frequency current 10 is BUCK circuit, the number of 10 medium-high frequency switching tube S of source of high frequency current is one.Certainly, for height
The particular circuit configurations of frequency current source 10 can be set according to actual needs, and the present invention does not do unique restriction to this.
The output end of electric current value controller 20 is connected with the control terminal of the HF switch pipe S in source of high frequency current 10, passes through
The conducting and shutdown situation for controlling high frequency open pipe, adjust the high frequency that source of high frequency current 10 exports in one or more switch periods
The amplitude of electric current reaches target value.Meanwhile the input terminal of electric current value controller 20 is connected with current distributing controller 30, receives electricity
The control of flow point stream controller 30, the first control signal control source of high frequency current 10 exported according to current distributing controller 30 exist
The copped wave time exports high-frequency current.Wherein, the amplitude for adjusting high-frequency current for electric current value controller is that the description of target value can
With the related embodiment part referring to above-mentioned LED adjusting method, details are not described herein.
Current distributing controller 30 is respectively and each switching tube K corresponding with each current rectifying and wave filtering circuit 40 of electric current value controller 20
Control terminal be connected.For exporting first control signal to electric current value controller 20 to control the work shape of electric current value controller 20
State, and second control signal is exported to each switching tube K, to control the on state of each switching tube K.It is controlled about current distributing
The description of relevant control is same is referred to above-mentioned LED adjusting method for the progress of device output first control signal and second control signal
Related embodiment part, this will not be repeated here.
Each current rectifying and wave filtering circuit 40 is parallel with one another, and is connected to the output end of source of high frequency current 10, and each rectifying and wave-filtering electricity
Road 40 is serially connected with switching tube K respectively.Each current rectifying and wave filtering circuit 40 can connect LED load all the way respectively, if current rectifying and wave filtering circuit 40
Conducting, then its LED load connected has electric current to pass through.Wherein, the turn-on time of each current rectifying and wave filtering circuit 40 is different, with for the moment
Only current rectifying and wave filtering circuit 40 is connected section all the way, and then, the current value and source of high frequency current 10 for flowing through the electric current of LED load export
High-frequency current it is equal, i.e., the high-frequency current that source of high frequency current 10 exports all flows into same current rectifying and wave filtering circuits 40, other whole
Stream filter circuit 40 then passes through without electric current.Wherein, for the particular number of current rectifying and wave filtering circuit 40, i.e., to above-mentioned predetermined number
Specific value, the present invention do not do unique restriction, carries out adaptable setting i.e. according to the quantity of LED load in practical application
It can.
In conclusion adjusting circuit by the LED, Multi-path LED load can be controlled, reduce control cost.Also,
LED provided by the present invention adjusts the non-parallel output capacitor of output end in circuit high-frequency current source, so that source of high frequency current is defeated
High-frequency current out can accurately distribute to each current rectifying and wave filtering circuit, effectively overcome since output capacitance is filtered energy storage
And the defect for causing electric current that cannot accurately distribute.
On the basis of the above embodiments, the present invention also provides the schematic diagram that second of LED adjusts circuit, figure is please referred to
5, Fig. 5 adjust the schematic diagram of circuit for another kind LED provided by the embodiment of the present invention.In conjunction with Fig. 5 it is found that in the present embodiment,
Source of high frequency current 10 includes HF switch pipe S0, transformer T1 and sampling resistor Rs.And the primary side winding Np of transformer T1 with
It is grounded after HF switch pipe S0 and sampling resistor Rs series connection；The vice-side winding Ns of transformer T1 is coupled and same with primary side winding Np
Name end is opposite.
For source of high frequency current 10 be foregoing circuit structure the case where, when using directly acquisition HF switch pipe S0 electric current
When value carries out electric current adjustment, pair can be obtained according to primary side winding Np current value according to HF switch pipe S0 current value
The numerical value for the high-frequency current that current value, that is, source of high frequency current 10 of side winding Ns exports, and then according to the numerical value of the high-frequency current,
Current regulation is carried out by control HF switch pipe S0.
On the basis of the above embodiments, the present invention also provides the schematic diagrames that the third LED adjusts circuit.Please refer to figure
6, Fig. 6 adjust the schematic diagram of circuit for another LED provided by the embodiment of the present invention.It will be appreciated from fig. 6 that in the present embodiment, it is high
Frequency current source 10 is realized by non-isolated BUCK circuit.Specifically, source of high frequency current 10 includes HF switch pipe S1, two poles
Pipe D1 and inductance L, and the cathode of diode D1 is connected with one end of HF switch pipe S1 and inductance L, the sun of diode D1
Pole ground connection, the other end of inductance L are connected with each current rectifying and wave filtering circuit 40.
Equally, by the way of for carrying out electric current adjustment using the current value for directly acquiring HF switch pipe S1, correspond to this
The current value of the BUCK circuit output, i.e. high-frequency current can be calculated in embodiment according to the current value of HF switch pipe S1
The high-frequency current that source 10 exports, and then according to the numerical value of the high-frequency current, current regulation is carried out by control HF switch pipe S1.
On the basis of the various embodiments described above, referring to FIG. 7, Fig. 7 is a kind of rectification filter provided by the embodiment of the present invention
The schematic diagram of wave circuit.In conjunction with Fig. 7, current rectifying and wave filtering circuit 40 may include: rectifier diode D2 and filter capacitor C；Wherein, whole
Diode D2 is flowed, is connected with filter capacitor C, it is in parallel with LED load.
Specifically, to simplify circuit structure, the present embodiment is carried out whole by concatenated rectifier diode D2 and filter capacitor C
Stream filtering.And filter capacitor C is in parallel with LED load.Wherein, for rectifier diode D2, filter capacitor C and switching tube K
Serial connection sequence, the present invention do not do unique restriction.For example, along the direction of high-frequency current, it can be successively with rectifier diode D2, filtering
Capacitor C, switching tube K are that sequence is connected.
On the basis of the above embodiments, referring to FIG. 8, Fig. 8 is that another LED provided by the embodiment of the present invention is adjusted
The schematic diagram of circuit；With reference to Fig. 8 it is found that in the present embodiment, the cathode of the rectifier diode D2 of each current rectifying and wave filtering circuit 40 with it is right
One end of the switching tube K answered is connected, the other end ground connection of switching tube K；The anode of rectifier diode D2 and one end of filter capacitor C
It is connected, the other end of filter capacitor C is connected with the output end of source of high frequency current 10.
On the basis of the above embodiments, referring to FIG. 9, Fig. 9 is that another LED provided by the embodiment of the present invention is adjusted
The schematic diagram of circuit；Know with reference to Fig. 9, in the present embodiment, the output end phase of the anode and source of high frequency current 10 of rectifier diode D2
Even, the cathode of rectifier diode D2 is connected with one end of corresponding switching tube K, the other end of switching tube K and the one of filter capacitor C
End is connected, the other end ground connection of filter capacitor C.
Because situation is complicated, it can not enumerate and be illustrated, those skilled in the art should be able to be, it is realized that mention in the present invention
It combines actual conditions to may exist multiple examples under the basic principle of the embodiment of confession, is not paying enough creative works
Under, it should be within the scope of the present invention.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
Circuit is adjusted to LED adjusting method provided by the present invention and LED above to be described in detail.It is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand
Method and its core concept of the invention.It should be pointed out that for those skilled in the art, not departing from this
, can be with several improvements and modifications are made to the present invention under the premise of inventive principle, these improvement and modification also fall into the present invention
Scope of protection of the claims.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also other elements including being not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment for including element.
Claims (10)
1. a kind of LED adjusting method characterized by comprising
Current distributing controller exports first control signal to electric current value controller respectively, exports the second control letter of different timing
Number to the corresponding concatenation of each current rectifying and wave filtering circuit switching tube；Wherein, when the first control signal includes copped wave time and dead zone
Between, and the copped wave time is alternately present with the dead time；
The electric current value controller controls source of high frequency current according to the first control signal and exports high frequency in the copped wave time
Electric current, and the amplitude for adjusting the high-frequency current is target value；It controls the source of high frequency current and exports institute in the dead time
The amplitude for stating high-frequency current is zero；
Each switching tube receives the second control signal on or off, so that the current rectifying and wave filtering circuit is described all the way
The conducting of copped wave time, having amplitude is that the high-frequency current of the target value passes through；And make each current rectifying and wave filtering circuit in institute
Dead time is stated to be turned off.
2. LED adjusting method according to claim 1, which is characterized in that the first control signal is a control week
In phase comprising with each current rectifying and wave filtering circuit one-to-one multiple copped wave times, and with the current rectifying and wave filtering circuit
The equal dead time of quantity；Wherein, each copped wave time leading according to the corresponding current rectifying and wave filtering circuit
Logical order successively occurs.
3. LED adjusting method according to claim 2, which is characterized in that each switching tube is respectively according to described second
It controls signal and recycles conducting according to the conducting order of the current rectifying and wave filtering circuit of corresponding concatenation.
4. LED adjusting method according to claim 1, which is characterized in that opened described in driving in the second control signal
Close pipe conducting control signal at the beginning of earlier than the copped wave time described in the first control signal at the beginning of, it is described
The finish time that signal is controlled described in second control signal is later than the end of copped wave time described in the first control signal
Moment.
5. LED adjusting method according to claim 1, which is characterized in that the electric current value controller adjusts the high frequency
The amplitude of electric current is to target value, comprising:
Acquire the current value of the source of high frequency current medium-high frequency switching tube, and according to the current value of the HF switch pipe and described
The amplitude of the high-frequency current is calculated in the duty cycle information of HF switch pipe；
Compare the numerical value of the high-frequency current and the size of the target value, and the high-frequency current is adjusted according to comparison result
Amplitude is the target value.
6. LED adjusting method according to claim 1, which is characterized in that further include:
The current distributing controller based on the received adjustment signal adjust the high-frequency current amplitude and/or it is described first control
Signal processed, to adjust the current value of the current rectifying and wave filtering circuit.
7. LED adjusting method according to claim 6, which is characterized in that the current distributing controller is based on the received
Adjustment signal adjusts the amplitude of the high-frequency current, comprising:
The current distributing controller sends modification instruction to the electric current value controller, to modify the target value, adjusts institute
State the current value of current rectifying and wave filtering circuit.
8. LED adjusting method according to claim 6, which is characterized in that the current distributing controller is based on the received
Adjustment signal adjusts the first control signal, comprising:
The current distributing controller is by adjusting the width of copped wave time described in the first control signal and/or passing through tune
Save the current value of current rectifying and wave filtering circuit described in the width adjusting of dead time described in the first control signal.
9. a kind of LED adjusts circuit characterized by comprising source of high frequency current, electric current value controller, current distributing controller,
The current rectifying and wave filtering circuit of preset quantity and each current rectifying and wave filtering circuit correspond to concatenated switching tube；Wherein, the preset quantity
Current rectifying and wave filtering circuit it is parallel with one another, and be connected with the output end of the source of high frequency current；The current distributing controller and institute
The input terminal for stating electric current value controller is connected, and the control of the concatenated switching tube corresponding with each current rectifying and wave filtering circuit respectively
End processed is connected；The control terminal of the HF switch pipe of the output end and source of high frequency current of the electric current value controller is connected.
The current distributing controller exports different timing to electric current value controller for output first control signal respectively
Second control signal corresponds to the switching tube of concatenation to each current rectifying and wave filtering circuit；Wherein, when the first control signal includes copped wave
Between and dead time, and the copped wave time is alternately present with the dead time；
The electric current value controller, for controlling the source of high frequency current in the copped wave time according to the first control signal
The amplitude for exporting high-frequency current, and adjusting the high-frequency current is target value；The source of high frequency current is controlled at the dead zone
Between to export the amplitude of the high-frequency current be zero；
The switching tube, for receiving the second control signal on or off, so that the current rectifying and wave filtering circuit exists all the way
The copped wave time conducting, having amplitude is that the high-frequency current of the target value passes through；And make each current rectifying and wave filtering circuit
It is turned off in the dead time.
10. LED according to claim 9 adjusts circuit, which is characterized in that the source of high frequency current includes:
HF switch pipe, transformer and sampling resistor；Wherein, the primary side winding of the transformer and the HF switch pipe with
And the sampling resistor series connection, the vice-side winding of the transformer is coupled with the primary side winding and Same Name of Ends is opposite.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249567.7A CN109168226A (en) | 2018-10-25 | 2018-10-25 | A kind of LED adjusting method and circuit |
| PCT/CN2019/104521 WO2020082908A1 (en) | 2018-10-25 | 2019-09-05 | Led adjustment method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249567.7A CN109168226A (en) | 2018-10-25 | 2018-10-25 | A kind of LED adjusting method and circuit |
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| CN109168226A true CN109168226A (en) | 2019-01-08 |
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| CN201811249567.7A Pending CN109168226A (en) | 2018-10-25 | 2018-10-25 | A kind of LED adjusting method and circuit |
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| WO2020082908A1 (en) * | 2018-10-25 | 2020-04-30 | 英飞特电子（杭州）股份有限公司 | Led adjustment method and circuit |
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