CN110198582A - A kind of control circuit of lighting circuit, control method and lighting circuit - Google Patents
A kind of control circuit of lighting circuit, control method and lighting circuit Download PDFInfo
- Publication number
- CN110198582A CN110198582A CN201910366034.5A CN201910366034A CN110198582A CN 110198582 A CN110198582 A CN 110198582A CN 201910366034 A CN201910366034 A CN 201910366034A CN 110198582 A CN110198582 A CN 110198582A
- Authority
- CN
- China
- Prior art keywords
- voltage
- lamp string
- control
- kth
- rectified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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]
-
- 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
-
- 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]
- H05B45/40—Details of LED load circuits
-
- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a kind of control circuit of lighting circuit, control method and lighting circuits, and rectified voltage is obtained after exchange input is rectified, and lighting circuit load is composed in series by N number of lamp string；When rectified voltage is in kth voltage range, control is connected from the first lamp string to kth lamp string, the shutdown of remaining lamp string；Light modulator is accessed when detecting that exchange inputs, timing is carried out to first time at the time of dimmer conduction, according to the voltage range of rectified voltage, control is connected from the first lamp string to q lamp string accordingly, within first time, hysteresis voltage is added when rectified voltage is greater than q+1 voltage, control is connected from the first lamp string to q+1 lamp string, remaining shutdown, when being connected from the first lamp string to q+1 lamp string, when remaining is turned off, when rectified voltage subtracts hysteresis voltage less than q+1 voltage, control is connected from the first lamp string to q lamp string, remaining shutdown；High Power Factor, and compatible light modulator may be implemented in the present invention, and scheme is simple, is easy to implement.
Description
Technical field
The present invention relates to power electronics fields, and in particular to a kind of control circuit of lighting circuit, control method and
Lighting circuit.
Background technique
LED light due to its environmental protection more more energy efficient than traditional fluorescent lamp and incandescent lamp, so LED light slowly replacing it is existing
Fluorescent lamp and incandescent lamp.In the incandescent lamp with light modulator, similarly wish to use LED light to replace, thus LED need to be simultaneous
Hold light modulator.Linear LED drive circuit realizes advantage simple, at low cost with it, is used widely.But linear LED drives
Circuit is moved due to constant current conduction mode inherent characteristics, the main product power factor of linearity light adjusting system currently on the market is low,
A large amount of harmonic pollution is generated to power grid, reduces power grid quality, interference is generated to other electrical equipments.Therefore, how linear
The problem of being compatible with light modulator in LED drive circuit, and realizing High Power Factor, be current urgent need to resolve.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of control circuit of lighting circuit, control method and power for illumination
Road, to solve the problems, such as that linear drive circuit power factor is low in the prior art and incompatible light modulator.
The technical solution of the invention is as follows, provides a kind of control circuit of lighting circuit, after exchange input is rectified
To rectified voltage, wherein the cold end of rectified voltage is used as with reference to ground, and the load of the lighting circuit is by N number of lamp string series connection group
At N is the natural number more than or equal to 2；
When the rectified voltage is in kth voltage range, the control circuit control is from first lamp string to institute
State the conducting of kth lamp string, the shutdown of remaining lamp string, wherein k is the natural number of 1~N, and kth voltage range is to be less than greater than kth voltage
+ 1 voltage of kth；+ 1 voltage of kth is greater than kth voltage；
When the control circuit detects exchange input access light modulator, at the first time since the dimmer conduction moment
Timing is carried out, according to the voltage range of the rectified voltage, control is connected from first lamp string to q lamp string accordingly,
In first time, the first hysteresis voltage is added when the rectified voltage is greater than q+1 voltage, is controlled accordingly from first lamp
It goes here and there to q+1 lamp string and is connected, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when described
Rectified voltage subtracts the second hysteresis voltage less than q+1 voltage, and control is connected from first lamp string to q lamp string, remaining pass
It is disconnected；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is small
When q voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from institute
It states the first lamp string to be connected to q-1 lamp string, when remaining is turned off, when the rectified voltage is greater than q voltage plus the 4th hysteresis electricity
Pressure, control are connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or
The 4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
As optional, when being connected from first lamp string to the m lamp string, first lamp string to m lamp string
Electric current declines with the rising of the rectified voltage, the m be 1~N natural number in it is any one or more.
As optional, including voltage detecting circuit and current control circuit, two input terminals of the voltage detecting circuit
It is connected respectively to the hot end and cold end of the rectified voltage, the current control circuit receives the voltage detecting electricity
The output voltage on road；The high voltage end of the rectified voltage is connected to the first end of the first lamp string, institute by one-way conduction element
The second end for stating the first lamp string is connected to by first switch module with reference to ground, and the second end of 2~N lamp string passes through the 2nd respectively
~N one-way conduction element is connected to 2~N switch module, and the output voltage of the current control circuit is connected to the described 1st~
The control terminal of N switch module；
The voltage detecting circuit judges whether the ac input end accesses light modulation by detecting the rectified voltage
Device；
The current control circuit is turned off by controlling the kth switch module conducting, control rest switch module, so that
It is connected from first lamp string to the kth lamp string, the shutdown of remaining lamp string.
As optional, 1~N switch module is 1~N MOS, and the grid of 1~N MOS is the described 1st
The control terminal of~N switch module.
As optional, the lighting circuit includes N number of sampling resistor, and the first end of the N MOS is adopted by the N
Sample resistance is connected to the reference ground, and the first end of the described 1st~(N-1) MOS passes through the described 1st~(N-1) sampling electricity respectively
Resistance is connected to the first end of the N MOS, and the current control circuit receives the first end voltage of 1~N MOS.
The present invention also provides a kind of control methods of lighting circuit, obtain rectified voltage after exchange input is rectified, wherein
The cold end of rectified voltage is used as with reference to ground, and the load of the lighting circuit is composed in series by N number of lamp string, and N is more than or equal to 2
Natural number,
When the rectified voltage is in kth voltage range, control is led from first lamp string to the kth lamp string
It is logical, remaining lamp string shutdown, wherein k is the natural number of 1~N, and kth voltage range is to be less than+1 voltage of kth greater than kth voltage；
+ 1 voltage of kth is greater than kth voltage；
When detecting exchange input access light modulator, timing, root are carried out to first time since the dimmer conduction moment
According to the voltage range of the rectified voltage, control is connected from first lamp string to q lamp string accordingly, within first time,
The first hysteresis voltage is added when the rectified voltage is greater than q+1 voltage, is controlled accordingly from first lamp string to q+1 lamp
String conducting, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when the rectified voltage is less than
Q+1 voltage subtracts the second hysteresis voltage, and control is connected from first lamp string to q lamp string, remaining shutdown；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is small
When q voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from institute
It states the first lamp string to be connected to q-1 lamp string, when remaining is turned off, when the rectified voltage is greater than q voltage plus the 4th hysteresis electricity
Pressure, control are connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or
The 4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
As optional, when being connected from first lamp string to the m lamp string, first lamp string to m lamp string
Electric current declines with the rising of the rectified voltage, the m be 1~N natural number in it is any one or more.
As optional, the high voltage end of the rectified voltage is connected to the first of the first lamp string by one-way conduction element
The second end at end, first lamp string is connected to by first switch module with reference to ground, and the second end of 2~N lamp string is led to respectively
It crosses 2~N one-way conduction element and is connected to 2~N switch module；
The rectified voltage is detected, and judges whether the ac input end accesses light modulator；
By controlling kth switch module conducting, control rest switch module shutdown so that from first lamp string to
The kth lamp string conducting, the shutdown of remaining lamp string.
As optional, 1~N switch module is 1~N MOS, and the grid of the 1~NMOS is the described 1st
The control terminal of~N switch module.
Another technical solution of the invention is to provide a kind of lighting circuit.
It has the advantage that and high power may be implemented compared with prior art using circuit structure and method of the invention
Factor, and compatible light modulator, scheme is simple, is easy to implement.
Detailed description of the invention
Fig. 1 (a) is rectified voltage VREC when input terminal of the present invention does not access light modulator, the first lamp string to the second lamp string
Voltage VF and input current iin waveform；
Fig. 1 (b) is in one embodiment of the invention, and input terminal accesses light modulator, rectified voltage VREC, the first lamp string to the
The voltage VF and input current iin waveform of two lamp strings；
Fig. 1 (c) is in another embodiment of the present invention, and input terminal accesses light modulator, and rectified voltage VREC, the first lamp string arrive
The voltage VF and input current iin waveform of second lamp string；
Fig. 1 (d) is in another embodiment of the invention, and input terminal accesses light modulator, and rectified voltage VREC, the first lamp string arrive
The voltage VF and input current iin waveform of second lamp string；
Fig. 2 (a) be the present invention in one embodiment, the voltage VF of rectified voltage VREC, the first lamp string to the second lamp string
And input current iin waveform；
Fig. 2 (b) be the present invention in another embodiment, the voltage of rectified voltage VREC, the first lamp string to the second lamp string
VF and input current iin waveform；
Fig. 3 is the realization block diagram of lighting circuit of the present invention and its control circuit；
Fig. 4 (a) is the capacitance connection mode of one embodiment of the invention；
Fig. 4 (b) is the capacitance connection mode of another embodiment of the present invention；
Fig. 5 is the lighting circuit and its control circuit of one embodiment of the invention；
Fig. 6 is the circuit diagram of the sampling resistor of one embodiment of the invention；
Fig. 7 is the circuit diagram of the sampling resistor of another embodiment of the present invention；
Fig. 8 is a kind of embodiment of current control circuit 420 of the present invention；
Fig. 9 is a kind of embodiment of lamp string of the present invention.
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.
The present invention provides a kind of control circuit of lighting circuit, rectified voltage is obtained after exchange input is rectified, wherein whole
The cold end of galvanic electricity pressure is used as with reference to ground, and the load of the lighting circuit is composed in series by N number of lamp string, and N is more than or equal to 2
Natural number；
When the rectified voltage is in kth voltage range, the control circuit control is from first lamp string to institute
State the conducting of kth lamp string, the shutdown of remaining lamp string, wherein k is the natural number of 1~N, and kth voltage range is to be less than greater than kth voltage
+ 1 voltage of kth；+ 1 voltage of kth is greater than kth voltage；
When the control circuit detects exchange input access light modulator, at the first time since the dimmer conduction moment
Timing is carried out, according to the voltage range of the rectified voltage, control is connected from first lamp string to q lamp string accordingly,
In first time, the first hysteresis voltage is added when the rectified voltage is greater than q+1 voltage, is controlled accordingly from first lamp
It goes here and there to q+1 lamp string and is connected, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when described
Rectified voltage subtracts the second hysteresis voltage less than q+1 voltage, and control is connected from first lamp string to q lamp string, remaining pass
It is disconnected；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is small
When q voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from institute
It states the first lamp string to be connected to q-1 lamp string, when remaining is turned off, when the rectified voltage is greater than q voltage plus the 4th hysteresis electricity
Pressure, control are connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or
The 4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
That is, within first time, the conducting of different lamp strings, which switches, to be needed when detecting dimmer conduction
Hysteresis is added, prevents the oscillation of voltage when dimmer conduction from leading to the malfunction of lamp string conducting switching.Light modulator is cut before including
Light modulator cuts light modulator with after.Preferably, the length of first time is 50us, after it's first time has past dimmer conduction,
The switching of different lamp strings conducting there is no need to which hysteresis is added, when with without light modulator as.High power may be implemented in the present invention
Factor, and compatible light modulator, scheme is simple, is easy to implement.
In one embodiment, it please refers to shown in Fig. 1 (a), is N=2, input terminal does not access rectified current when light modulator
Press the voltage VF and input current iin waveform of VREC, the first lamp string to the second lamp string
In another embodiment, it please refers to shown in Fig. 1 (b) and Fig. 1 (c), is N=2, when input terminal accesses light modulator
Rectified voltage VREC, the voltage VF of the first lamp string to the second lamp string and input current iin waveform.Due to after dimmer conduction
First time in, without lamp string conducting switching, therefore, lamp string be connected switch when, the threshold value that voltage compares is not required to
Hysteresis voltage is added.
In yet another embodiment, it please refers to shown in Fig. 1 (d), is N=2, input terminal accesses rectified voltage when light modulator
VREC, the voltage VF of the first lamp string to the second lamp string and input current iin waveform.At the t1 moment, dimmer conduction is whole at this time
Flow voltage range in first voltage range, therefore the first lamp string be connected, the second lamp string shutdown, and start to first time into
Row timing, at the t2 moment, first time timing is also not finished, and rectified voltage is greater than second voltage V2 and adds the first hysteresis voltage,
First and second lamp strings are all connected；To the t3 moment, first time timing terminates.
When light modulator incision, rectified voltage can generate biggish oscillation, in order to prevent shadow of the oscillation to system
It rings, in addition to mentioned-above first hysteresis voltage is added to the 4th hysteresis voltage, the lead-edge-blanking time can also be added.Work as light modulator
When conducting, the lead-edge-blanking time starts timing, after the timing of forward position blanking time, according to the voltage model of the rectified voltage
It encloses, control is connected from first lamp string to q lamp string accordingly.Generally, the lead-edge-blanking time is several hundred ns, is less than 1us.
In one embodiment, when being connected from first lamp string to the m lamp string, first lamp string to m
The electric current of lamp string declines with the rising of the rectified voltage, the m be 1~N natural number in it is any one or more.
By setting electric current as the rising of the rectified voltage declines so that improving the efficiency of system.In one embodiment, it asks
With reference to shown in Fig. 2 (a), when being N=2, rectified voltage waveform, lamp string voltage and input current waveform, when the first and second lamps
When string is all connected, electric current declines with the rising of rectified voltage；When the first lamp string is connected, and the second lamp string turns off, the first lamp
The electric current of string is steady state value.In another embodiment, it please refers to shown in Fig. 2 (b), when being N=2, is connected for the first lamp string, the
When the shutdown of two lamp strings and the first, second lamp string are all connected, electric current declines with the rising of rectified voltage.
It please refers to shown in Fig. 3, the control circuit 400 of lighting circuit includes voltage detecting circuit 410 and current control circuit
420, two input terminals of the voltage detecting circuit 410 are connected respectively to the hot end and low potential of the rectified voltage
End, the current control circuit 420 receive the output voltage of the voltage detecting circuit 410；The high voltage of the rectified voltage
End is connected to the first end of the first lamp string by one-way conduction element, and the second end of first lamp string passes through first switch module
It is connected to reference to ground, the second end of 2~N lamp string passes through 2~N one-way conduction element respectively and is connected to 2~N switching molding
Block, the output voltage of the current control circuit are connected to the control terminal of 1~N switch module；The voltage detecting electricity
Road judges whether the ac input end accesses light modulator by detecting the rectified voltage；The current control circuit is logical
It crosses and controls the kth switch module conducting, control rest switch module shutdown, so that from first lamp string to the kth lamp
String conducting, the shutdown of remaining lamp string.
Please refer to shown in Fig. 4 (a), the both ends of capacitor C00 be connected to the first lamp string first end and N lamp string the
Two ends.Capacitor C00 is added, reduces load ripple.
It please refers to shown in Fig. 4 (b), is the capacitance connection mode of another embodiment, capacitor C01~C0N is respectively with first
LED1~N lamp string LEDN is in parallel.
As an implementation, 1~N switch module is 1~N MOS, and the grid of the 1~NMOS is
The control terminal of 1~N switch module.Metal-oxide-semiconductor can be NMOS and be also possible to PMOS.It is illustrated by taking NMOS as an example.Institute
The first end and second end for stating MOS is respectively the source electrode and drain electrode of NMOS.
It please refers to shown in Fig. 5,1~N switch module SW1~SWN is 1~N NMOS, the 1~NNMOS
Grid be 1~N switch module SW1~SWN control terminal.
With continued reference to shown in Fig. 5, lighting circuit includes N number of sampling resistor, and the source electrode of the NNMOS passes through the N
Sampling resistor R0N is connected to the reference ground, and the source electrode of the described 1st~(N-1) NMOS passes through first sampling resistor respectively
R01~the (N-1) sampling resistor R0 (N-1) is connected to the source electrode of the N NMOS, and the current control circuit 420 receives institute
State the source voltage of 1~N NMOS.
Refering to what is shown in Fig. 6, being another connection type of sampling resistor, the source electrode of N NMOS is sampled by the N
Resistance R0N is connected to described with reference to ground, and the source electrode of the m NMOS is connected to described the by the m sampling resistor R0k
(m+1) source electrode of NMOS, the current control circuit 420 receive source voltage S01~S0N of 1~N NMOS, wherein
M is the natural number of 1~(N-1).
It please refers to shown in Fig. 7, is another connection type of sampling resistor, the source electrode of 1~N NMOS passes through the described 1st
~N sampling resistor R01~R0N is connected to the reference ground, and the current control circuit 420 receives 1~N NMOS's
Source voltage S01~S0N.
The current control circuit 420 is according to the size of the rectified voltage VREC, to the source electrode of the 1~NNMOS
Voltage S01~S0N carries out operation amplifier, and the grid voltage G01~G0N for controlling 1~N NMOS makes 1~N NMOS
Source voltage S01~S0N close to 1~N reference voltage.
It please refers to shown in Fig. 8, is a kind of embodiment of current control circuit 420.The source voltage of 1~N NMOS
S01~S0N is connected respectively to the negative input end of 421~42N of operational amplification circuit, 1~N reference voltage REF1~REFN difference
It is connected to the positive input terminal of operational amplification circuit A, voltage detecting circuit 410 exports enable signal EN1~ENN, is connected respectively to
The output end of the enable end of 421~42N of operational amplification circuit, 421~42N of operational amplification circuit is connected to 1~N NMOS's
Grid voltage G01~G0N.The output end of operational amplifier 42N is connected to by capacitor C421 with reference to ground.
It please refers to shown in Fig. 9, the m lamp string is the LED of multiple sequential series.The quantity of different LED light strings can not
It is equal.
In order to be compatible with light modulator, lighting circuit further includes leadage circuit 300, is please referred to shown in Fig. 3, leadage circuit 300
Both ends are connected respectively to the hot end and cold end of rectified voltage, and the output of voltage detecting circuit 410 controls leadage circuit.
When voltage detecting circuit 410 detects that input side does not access light modulator, then controls leadage circuit 300 and do not generate and let out
Discharge stream.When voltage detecting circuit 410 detect input side access light modulator, work as dimmer conduction, but input current is too small
So that it cannot then leadage circuit generates leakage current when maintaining the conducting of light modulator, so that input current is sufficiently large, to maintain
The normally of light modulator.
The present invention provides a kind of lighting circuit, including above-mentioned control circuit 400.
The present invention also provides a kind of control methods of lighting circuit, obtain rectified voltage after exchange input is rectified, wherein
The cold end of rectified voltage is used as with reference to ground, and the load of the lighting circuit is composed in series by N number of lamp string, and N is more than or equal to 2
Natural number,
When the rectified voltage is in kth voltage range, control is led from first lamp string to the kth lamp string
It is logical, remaining lamp string shutdown, wherein k is the natural number of 1~N, and kth voltage range is to be less than+1 voltage of kth greater than kth voltage；
+ 1 voltage of kth is greater than kth voltage；
When detecting exchange input access light modulator, timing, root are carried out to first time since the dimmer conduction moment
According to the voltage range of the rectified voltage, control is connected from first lamp string to q lamp string accordingly, within first time,
The first hysteresis voltage is added when the rectified voltage is greater than q+1 voltage, is controlled accordingly from first lamp string to q+1 lamp
String conducting, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when the rectified voltage is less than
Q+1 voltage subtracts the second hysteresis voltage, and control is connected from first lamp string to q lamp string, remaining shutdown；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is small
When q voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from institute
It states the first lamp string to be connected to q-1 lamp string, when remaining is turned off, when the rectified voltage is greater than q voltage plus the 4th hysteresis electricity
Pressure, control are connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or
The 4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
In one embodiment, when being connected from first lamp string to the m lamp string, first lamp string to
The electric current of m lamp string declines with the rising of the rectified voltage, the m be 1~N natural number in it is any one or more.
In one embodiment, the high voltage end of the rectified voltage is connected to the first lamp string by one-way conduction element
First end, the second end of first lamp string is connected to by first switch module with reference to ground, the second end of 2~N lamp string
2~N switch module is connected to by 2~N one-way conduction element respectively；
The rectified voltage is detected, and judges whether the ac input end accesses light modulator；
By controlling kth switch module conducting, control rest switch module shutdown so that from first lamp string to
The kth lamp string conducting, the shutdown of remaining lamp string.
In one embodiment, 1~N switch module is 1~N MOS, the grid of 1~N MOS
For the control terminal of 1~N switch module.
In one embodiment, the lighting circuit includes N number of sampling resistor, and the first end of the N MOS is passed through
The N sampling resistor is connected to the reference ground, and the first end of the described 1st~(N-1) MOS passes through the 1st~(N- respectively
1) sampling resistor is connected to the first end of the N MOS, and the current control circuit receives the first of 1~N MOS
Hold voltage.
In one embodiment, operation amplifier is carried out to the first end voltage of 1~N MOS, controls institute respectively
The grid voltage for stating 1~N MOS makes the first end voltage of 1~N MOS close to 1~N reference voltage.
In addition to this, although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in this field
Those of ordinary skill apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and record is not known
Content, then can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of control circuit of lighting circuit, it is characterised in that: rectified voltage is obtained after exchange input is rectified, wherein rectifying
The cold end of voltage is used as with reference to ground, and the load of the lighting circuit is composed in series by N number of lamp string, N be more than or equal to 2 from
So number；
When the rectified voltage is in kth voltage range, the control circuit control is from first lamp string to the kth
Lamp string conducting, the shutdown of remaining lamp string, wherein k is the natural number of 1~N, and kth voltage range is to be less than kth+1 greater than kth voltage
Voltage；+ 1 voltage of kth is greater than kth voltage；
When the control circuit detects exchange input access light modulator, to first time progress since the dimmer conduction moment
Timing, according to the voltage range of the rectified voltage, control is connected from first lamp string to q lamp string accordingly, first
In time, when the rectified voltage be greater than q+1 voltage add the first hysteresis voltage, control accordingly from first lamp string to
The conducting of q+1 lamp string, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when the rectification
Voltage subtracts the second hysteresis voltage less than q+1 voltage, and control is connected from first lamp string to q lamp string, remaining shutdown；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is less than q
When voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from described the
One lamp string is connected to q-1 lamp string, when remaining is turned off, adds the 4th hysteresis voltage, control when the rectified voltage is greater than q voltage
System is connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or described
4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
2. the control circuit of lighting circuit according to claim 1, it is characterised in that: when from first lamp string to described
When m lamp string is connected, the electric current of first lamp string to m lamp string declines with the rising of the rectified voltage, and the m is
In the natural number of 1~N it is any one or more.
3. the control circuit of lighting circuit according to claim 1, it is characterised in that: including voltage detecting circuit and electric current
Control circuit, two input terminals of the voltage detecting circuit are connected respectively to the hot end and low potential of the rectified voltage
End, the current control circuit receive the output voltage of the voltage detecting circuit；The high voltage end of the rectified voltage passes through
One-way conduction element is connected to the first end of the first lamp string, and the second end of first lamp string is connected to by first switch module
With reference to ground, the second end of 2~N lamp string passes through 2~N one-way conduction element respectively and is connected to 2~N switch module, described
The output voltage of current control circuit is connected to the control terminal of 1~N switch module；
The voltage detecting circuit judges whether the ac input end accesses light modulator by detecting the rectified voltage；
The current control circuit is by controlling the kth switch module conducting, control rest switch module shutdown, so that from institute
It states the first lamp string to be connected to the kth lamp string, the shutdown of remaining lamp string.
4. the control circuit of lighting circuit according to claim 3, it is characterised in that: 1~N switch module is the
The grid of 1~N MOS, 1~N MOS are the control terminal of 1~N switch module.
5. the control circuit of lighting circuit according to claim 4, it is characterised in that: the lighting circuit includes N number of adopts
Sample resistance, the first end of the N MOS are connected to described with reference to ground, the described 1st~(N-1) by the N sampling resistor
The first end of MOS passes through the first end that the described 1st~(N-1) sampling resistor is connected to the N MOS, the electric current control respectively
Circuit processed receives the first end voltage of 1~N MOS.
6. a kind of control method of lighting circuit, it is characterised in that: rectified voltage is obtained after exchange input is rectified, wherein rectifying
The cold end of voltage is used as with reference to ground, and the load of the lighting circuit is composed in series by N number of lamp string, N be more than or equal to 2 from
So number,
When the rectified voltage is in kth voltage range, control is connected from first lamp string to the kth lamp string,
Remaining lamp string shutdown, wherein k is the natural number of 1~N, and kth voltage range is to be less than+1 voltage of kth greater than kth voltage；Kth+1
Voltage is greater than kth voltage；
When detecting exchange input access light modulator, timing is carried out to first time since the dimmer conduction moment, according to institute
The voltage range of rectified voltage is stated, control is connected from first lamp string to q lamp string accordingly, within first time, works as institute
Rectified voltage is stated greater than q+1 voltage plus the first hysteresis voltage, control is led from first lamp string to q+1 lamp string accordingly
It is logical, remaining shutdown, when being connected from first lamp string to q+1 lamp string, when remaining is turned off, when the rectified voltage is less than q+
1 voltage subtracts the second hysteresis voltage, and control is connected from first lamp string to q lamp string, remaining shutdown；
Or/and be connected when described from first lamp string to q lamp string, within first time, when the rectified voltage is less than q
When voltage subtracts third hysteresis voltage, control is connected from first lamp string to q-1 lamp string, remaining shutdown, when from described the
One lamp string is connected to q-1 lamp string, when remaining is turned off, adds the 4th hysteresis voltage, control when the rectified voltage is greater than q voltage
System is connected from first lamp string to q lamp string, remaining shutdown；
Wherein, the first hysteresis voltage and/or the second hysteresis voltage and/or the third hysteresis voltage and/or described
4th hysteresis voltage is more than or equal to one in the natural number that zero, q is 1~N.
7. the control method of lighting circuit according to claim 6, it is characterised in that: when from first lamp string to described
When m lamp string is connected, the electric current of first lamp string to m lamp string declines with the rising of the rectified voltage, and the m is
In the natural number of 1~N it is any one or more.
8. the control method of lighting circuit according to claim 6, it is characterised in that: the high voltage end of the rectified voltage
The first end of the first lamp string is connected to by one-way conduction element, the second end of first lamp string is connected by first switch module
It is connected to reference to ground, the second end of 2~N lamp string passes through 2~N one-way conduction element respectively and is connected to 2~N switch module；
The rectified voltage is detected, and judges whether the ac input end accesses light modulator；
By controlling kth switch module conducting, control rest switch module shutdown, so that from first lamp string to described
The conducting of kth lamp string, the shutdown of remaining lamp string.
9. the control method of lighting circuit according to claim 7, it is characterised in that: 1~N switch module is the
The grid of 1~N MOS, 1~N MOS are the control terminal of 1~N switch module.
10. a kind of lighting circuit, it is characterised in that: including the control circuit as described in Claims 1 to 5 any one, or use
The control circuit as described in claim 6~9 any one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810434278 | 2018-05-08 | ||
| CN2018104342788 | 2018-05-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110198582A true CN110198582A (en) | 2019-09-03 |
| CN110198582B CN110198582B (en) | 2021-08-31 |
Family
ID=66408579
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910187503.7A Active CN109757008B (en) | 2018-05-08 | 2019-03-13 | Control circuit and control method of lighting circuit and lighting circuit |
| CN201910229915.2A Active CN110035575B (en) | 2018-05-08 | 2019-03-25 | Control circuit and control method of lighting circuit and lighting circuit |
| CN201910366034.5A Active CN110198582B (en) | 2018-05-08 | 2019-04-30 | Control circuit and control method of lighting circuit and lighting circuit |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910187503.7A Active CN109757008B (en) | 2018-05-08 | 2019-03-13 | Control circuit and control method of lighting circuit and lighting circuit |
| CN201910229915.2A Active CN110035575B (en) | 2018-05-08 | 2019-03-25 | Control circuit and control method of lighting circuit and lighting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN109757008B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010218811A (en) * | 2009-03-16 | 2010-09-30 | Toshio Takahashi | Led lighting circuit |
| CN102186282A (en) * | 2011-03-21 | 2011-09-14 | 中国航天科技集团公司第九研究院第七七一研究所 | Drive circuit capable of improving power factors of alternating current light emitting diode (AC LED) lamp |
| CN202602987U (en) * | 2012-04-12 | 2012-12-12 | 上海晶丰明源半导体有限公司 | LED linear driving circuit suitable for silicon controlled light modulator |
| US20180014369A1 (en) * | 2016-07-07 | 2018-01-11 | Fairchild Korea Semiconductor Ltd. | Led driver circuit and led driving method |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI495389B (en) * | 2008-09-05 | 2015-08-01 | Eldolab Holding Bv | Led based lighting application |
| US8299724B2 (en) * | 2010-03-19 | 2012-10-30 | Active-Semi, Inc. | AC LED lamp involving an LED string having separately shortable sections |
| CN102665324A (en) * | 2012-04-12 | 2012-09-12 | 上海晶丰明源半导体有限公司 | LED linear driving circuit applicable to thyristor dimmer and control method |
| CN102858062A (en) * | 2012-08-22 | 2013-01-02 | 深圳市明微电子股份有限公司 | Light emitting diode (LED) control circuit and LED illuminating device |
| KR102125245B1 (en) * | 2013-06-28 | 2020-06-22 | 주식회사 실리콘웍스 | Led lighting apparatus and control circuit thereof |
| CN103561509B (en) * | 2013-10-17 | 2015-10-14 | 易美芯光（北京）科技有限公司 | Switching tube separated LED driving circuit structure |
| TWM485583U (en) * | 2014-05-16 | 2014-09-01 | Unity Opto Technology Co Ltd | Resistot type light adjusting circuit |
| CN104020377A (en) * | 2014-06-13 | 2014-09-03 | 成都芯源系统有限公司 | LED driving device, controller thereof and dimming mode detection method |
| CN104582140A (en) * | 2014-12-08 | 2015-04-29 | 深圳市众明半导体照明有限公司 | Linear dimming circuit |
| JP6396793B2 (en) * | 2014-12-26 | 2018-09-26 | ニチコン株式会社 | Switching power supply circuit |
| KR20170019943A (en) * | 2015-08-13 | 2017-02-22 | 주식회사 실리콘웍스 | Lighting apparatus |
| KR102453820B1 (en) * | 2015-08-21 | 2022-10-17 | 서울반도체 주식회사 | Driving circuit and lighting apparatus for light emitting diode |
| CN105282929B (en) * | 2015-10-20 | 2018-04-27 | 晨辉光宝科技有限公司 | A kind of full voltage piece-wise linear constant current LED drive circuit of automatic switchover mode |
| CN110035576A (en) * | 2015-11-12 | 2019-07-19 | 台湾快捷国际股份有限公司 | LED drive |
| CN106132030B (en) * | 2016-08-18 | 2018-02-09 | 杰华特微电子（杭州）有限公司 | A kind of illumination driving circuit and illuminator |
| CN106793317B (en) * | 2016-12-30 | 2018-12-14 | 杰华特微电子（杭州）有限公司 | Light adjusting circuit, light-dimming method and LED drive circuit |
| CN206365087U (en) * | 2016-12-30 | 2017-07-28 | 杰华特微电子（杭州）有限公司 | Light adjusting circuit and LED drive circuit |
| CN206542605U (en) * | 2017-03-17 | 2017-10-03 | 厦门方光电子科技有限公司 | Multifunctional LED dims Dolby circuit and LED dimming power sources |
-
2019
- 2019-03-13 CN CN201910187503.7A patent/CN109757008B/en active Active
- 2019-03-25 CN CN201910229915.2A patent/CN110035575B/en active Active
- 2019-04-30 CN CN201910366034.5A patent/CN110198582B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010218811A (en) * | 2009-03-16 | 2010-09-30 | Toshio Takahashi | Led lighting circuit |
| CN102186282A (en) * | 2011-03-21 | 2011-09-14 | 中国航天科技集团公司第九研究院第七七一研究所 | Drive circuit capable of improving power factors of alternating current light emitting diode (AC LED) lamp |
| CN202602987U (en) * | 2012-04-12 | 2012-12-12 | 上海晶丰明源半导体有限公司 | LED linear driving circuit suitable for silicon controlled light modulator |
| US20180014369A1 (en) * | 2016-07-07 | 2018-01-11 | Fairchild Korea Semiconductor Ltd. | Led driver circuit and led driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109757008B (en) | 2021-06-18 |
| CN110198582B (en) | 2021-08-31 |
| CN110035575A (en) | 2019-07-19 |
| CN110035575B (en) | 2021-05-14 |
| CN109757008A (en) | 2019-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108449843A (en) | A kind of control circuit of lighting circuit, control method and lighting circuit | |
| US11729874B2 (en) | Load control device for high-efficiency loads | |
| CN103561509B (en) | Switching tube separated LED driving circuit structure | |
| CN102497695A (en) | LED linear constant current control circuit and LED linear circuit | |
| CN202602987U (en) | LED linear driving circuit suitable for silicon controlled light modulator | |
| CN102595715A (en) | Light-emitting diode (LED) linear current control circuit and LED linear circuit | |
| CN102665324A (en) | LED linear driving circuit applicable to thyristor dimmer and control method | |
| CN202551415U (en) | LED linear current control circuit and LED linear circuit | |
| CN202353874U (en) | Light emitting diode (LED) linear constant-current control circuit and LED linear circuit | |
| CN208175052U (en) | A kind of control circuit and lighting circuit of lighting circuit | |
| CN110198582A (en) | A kind of control circuit of lighting circuit, control method and lighting circuit | |
| US20130187551A1 (en) | Method and System for Driving LEDs from a Source of Rectified AC Voltage | |
| CN103458551A (en) | Switch LED drive circuit and LED lighting system | |
| CN210641109U (en) | Constant-current electrodeless dimming driving circuit | |
| CN109561539A (en) | A kind of digital timing invariable power directly driven by AC LED circuit | |
| CN109618467B (en) | Linear LED load matching circuit under double voltages | |
| CN108419338B (en) | Four-in-one LED constant current dimming driving circuit | |
| CN203632941U (en) | LED drive circuit structure with separated switching tube | |
| US20190166663A1 (en) | Currnet holding circuit for bidirectional triode thyristor dimmer and linear dimming driving circuit using the same | |
| CN205071401U (en) | A LED constant -current drive apparatus | |
| CN210840146U (en) | Stepless dimming circuit without stroboflash and dimming LED lamp | |
| CN220629623U (en) | Multipath dimming control circuit and LED lamp | |
| CN209643033U (en) | A kind of more current driving circuits based on toggle switch | |
| CN203560762U (en) | LED PAR lamp | |
| CN215734955U (en) | Intelligent lamp control circuit based on high-voltage linear constant current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY (HANGZHOU) Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |