CN106211486B - A kind of LED lamp and its light modulation toning circuit - Google Patents
A kind of LED lamp and its light modulation toning circuit Download PDFInfo
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- CN106211486B CN106211486B CN201610798715.5A CN201610798715A CN106211486B CN 106211486 B CN106211486 B CN 106211486B CN 201610798715 A CN201610798715 A CN 201610798715A CN 106211486 B CN106211486 B CN 106211486B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- 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]
- H05B45/20—Controlling the colour of the light
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Abstract
The invention belongs to field of LED drive technology, a kind of LED lamp and its light modulation toning circuit are provided.In the present invention,By using including reverse-blocking tetrode thyristor module,The LED light modulation toning circuits of rectification module and at least one LED light modulation toning modules,LED light modulation toning modules include partial pressure unit,LED luminescence units and switch unit,Reverse-blocking tetrode thyristor module exports corresponding cut phase electric current and cut phase voltage to rectification module after carrying out cut phase with electric current to the voltage that AC power exports,Rectification module exports after carrying out rectification to cut phase electric current and cut phase voltage to LED luminescence units and partial pressure unit,Partial pressure unit exports after being divided to the cut phase voltage after rectification to switch unit,Switch unit shines according under the cut phase function of current of the cut phase voltage control LED luminescence units after rectification after partial pressure according to corresponding bright and coloration,Solve the problems, such as that existing LED illumination source presence cannot be carried out at the same time brightness regulation and coloration is adjusted.
Description
Technical field
The invention belongs to field of LED drive technology more particularly to a kind of LED lamp and its light modulation toning circuits.
Background technology
In recent years, LED light substitutes traditional incandescent lamp and has been widely used as mains lighting supply, and with people
The development of the raising and LED technologies that require LED illumination source, Dimmable LED light source comes into being, however, existing LED
The linear constant current driving thyristor regulating optical circuit of light source is merely able to realize monochromatic adjusting brightness, and cannot carry out coloration adjusting and answer
With.
In conclusion existing LED illumination source has that cannot be carried out at the same time brightness regulation and coloration is adjusted.
Invention content
The purpose of the present invention is to provide a kind of LED lamp and its light modulation toning circuits, it is intended to solve existing LED and shine
Bright source has that cannot be carried out at the same time brightness regulation and coloration is adjusted.
The invention is realized in this way a kind of LED light modulations toning circuit, including reverse-blocking tetrode thyristor module and rectification module,
The input terminal of the reverse-blocking tetrode thyristor module is connect with the first end of external AC power, the reverse-blocking tetrode thyristor module it is defeated
Outlet is connect with the first input end of the rectification module, and the of the second input terminal of the rectification module and the AC power
Two ends connect, the ground terminal ground connection of the rectification module, and the LED light modulations toning circuit further includes that at least one LED light modulations are adjusted
Color module, the LED light modulations toning module includes partial pressure unit, LED luminescence units and switch unit；
The input terminal of the LED light modulations toning module is connect with the output end of the rectification module, and the LED light modulations are adjusted
The output end of color module is grounded, the input terminal of the input terminal of the partial pressure unit and the LED luminescence units connect altogether to be formed it is described
The input terminal of LED light modulation toning modules, the first input end of the first output end and the switch unit of the LED luminescence units
Connection, the second output terminal of the LED luminescence units are connect with the second input terminal of the switch unit, the partial pressure unit
First output end is connect with the control terminal of the switch unit, the output end of the switch unit and the second of the partial pressure unit
Output end connects the output end to form the LED light modulations toning module altogether；
Output is corresponding after the reverse-blocking tetrode thyristor module carries out cut phase to the voltage that the AC power exports with electric current
Cut phase electric current and cut phase voltage to the rectification module, the rectification module carry out the cut phase electric current and the cut phase voltage
Output to the LED luminescence units and the partial pressure unit, the partial pressure unit carries out the cut phase voltage after rectification after rectification
Output to the switch unit, the switch unit controls the LED luminescence units according to the cut phase voltage after partial pressure after partial pressure
It shines according to corresponding bright and coloration under the cut phase function of current after rectification.
Another object of the present invention, which also resides in, provides a kind of LED lamp, and the LED lamp includes that above-mentioned LED light modulations are adjusted
Color circuit.
In the present invention, tune is dimmed by using including reverse-blocking tetrode thyristor module, rectification module and at least one LED
The LED light modulation toning circuits of color module, wherein LED light modulation toning modules include partial pressure unit, LED luminescence units and switch
Unit, reverse-blocking tetrode thyristor module export corresponding cut phase electric current and cut after carrying out cut phase with electric current to the voltage that AC power exports
Phase voltage to rectification module, rectification module exports to LED luminescence units and divides after carrying out rectification to cut phase electric current and cut phase voltage
Output is to switch unit after pressing unit, partial pressure unit to divide the cut phase voltage after rectification, after switch unit is according to partial pressure
The cut phase function of current of the cut phase voltage control LED luminescence units after rectification under shine according to corresponding bright and coloration, realize
The toning and light modulation of LED luminescence units, and then solve existing LED illumination source in the presence of brightness regulation and color cannot be carried out at the same time
The problem of degree is adjusted.
Description of the drawings
Fig. 1 is the modular structure schematic diagram for the LED light modulation toning circuits that one embodiment of the invention is provided；
Fig. 2 is the modular structure schematic diagram for the LED light modulation toning circuits that another embodiment of the present invention is provided；
Fig. 3 is the electrical block diagram for the LED light modulation toning circuits that one embodiment of the invention is provided.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The realization of the present invention is described in detail below in conjunction with specific attached drawing：
As shown in Figure 1, the embodiment of the present invention provided LED light modulation toning circuit 1 include reverse-blocking tetrode thyristor module 10 with
Rectification module 11, the input terminal of reverse-blocking tetrode thyristor module 10 are connect with the first end of external AC power (not shown),
The output end of reverse-blocking tetrode thyristor module 10 is connect with the first input end of rectification module 11, the second input terminal of rectification module 11 with
The second end of AC power connects, the ground terminal ground connection of rectification module 11, and LED light modulation toning circuits 1 further include at least one
LED light modulation toning modules 12, LED light modulation toning modules 12 include that partial pressure unit 120, LED luminescence units 121 and switch are single
Member 122.
Wherein, the input terminal of LED light modulations toning module 12 is connect with the output end of rectification module 11, LED light modulation toning moulds
The output end of block 12 is grounded, and the input terminal of partial pressure unit 120 connects to form LED light modulations with the input terminal of LED luminescence units 121 altogether
The input terminal for module 12 of mixing colours, the first output end of LED luminescence units 121 are connect with the first input end of switch unit 122,
The second output terminal of LED luminescence units 121 is connect with the second input terminal of switch unit 122, the first output of partial pressure unit 120
End is connect with the control terminal of switch unit 122, and the output end of switch unit 122 connects altogether with the second output terminal of partial pressure unit 120
Form the output end of LED light modulation toning modules 12.
Specifically, output is corresponding after reverse-blocking tetrode thyristor module 10 carries out cut phase to the voltage that AC power exports with electric current
Cut phase electric current and cut phase voltage to rectification module 11, rectification module 11 to cut phase electric current and cut phase voltage export after rectification to
LED luminescence units 121 and partial pressure unit 120, output extremely switch after partial pressure unit 120 divides the cut phase voltage after rectification
Unit 122, switch unit 122 are made according to cut phase electric current of the cut phase voltage control LED luminescence units 121 after rectification after partial pressure
It shines according to corresponding bright and coloration under.
Further, as a preferred embodiment of the present invention, as shown in Fig. 2, switch unit 122 includes switch subelement
122a and light modulation toning subelement 122b.
Wherein, the control terminal of switch subelement 122a is the control terminal of switch unit 122, and switch subelement 122a's is defeated
Enter end to connect with the first output end of light modulation toning subelement 122b, the first output end and the light modulation of switch subelement 122a are mixed colours
The second output terminal of subelement 122b connects, and the second output terminal of switch subelement 122a is the output end of switch unit 122, is adjusted
Light mix colours subelement 122b first input end be switch unit 122 first input end, the of light modulation toning subelement 122b
Two input terminals are the second input terminal of switch unit 122, the ground terminal ground connection of light modulation toning subelement 122b.
Specifically, when reverse-blocking tetrode thyristor 10 not cut phase of module, switch subelement 122a is exported according to partial pressure unit 120
Branch pressure voltage enter the first working condition, and according to the first working condition export first control signal to light modulation toning subelement
122b, light modulation toning subelement 122b control LED luminescence units 121 according to corresponding bright and coloration according to first control signal
It shines.
When reverse-blocking tetrode thyristor module 10 carries out first angle cut phase, switch subelement 122a is defeated according to partial pressure unit 120
Cut phase voltage after the partial pressure gone out enters the second working condition, and exports second control signal to light modulation according to the second working condition
Mix colours subelement 122b, and light modulation toning subelement 122b controls LED luminescence units 121 according to corresponding bright according to second control signal
Degree and coloration shine.
When reverse-blocking tetrode thyristor module 10 carries out second angle cut phase, switch subelement 122a is defeated according to partial pressure unit 120
Cut phase voltage after the partial pressure gone out enters third working condition, and exports third control signal to light modulation according to third working condition
Mix colours subelement 122b, and light modulation toning subelement 122b controls signal control LED luminescence units 121 according to corresponding bright according to third
Degree and coloration shine.
It should be noted that in the present embodiment, reverse-blocking tetrode thyristor module 10 is realized by reverse-blocking tetrode thyristor, and silicon-controlled open
It closes the progress first angle cut phase of module 10 and refers to that reverse-blocking tetrode thyristor cuts 50% phase, reverse-blocking tetrode thyristor module 10 carries out second jiao
Degree cut phase refers to that reverse-blocking tetrode thyristor is switched to the first small phase angle, it is preferred that the first small phase angle can be 20% phase, be worth note
Meaning, when reverse-blocking tetrode thyristor is switched to the first small phase angle, the cut phase voltage of reverse-blocking tetrode thyristor output has to be larger than LED
The conducting voltage of luminescence unit 121.
Further, as a preferred embodiment of the present invention, as shown in figure 3, switch subelement 122a includes switch element
Q1, first resistor R1 and the first capacitance C1.
Wherein, the control terminal of switch element Q1 is to switch the control terminal of subelement 122a, and the input terminal of switch element Q1 is
The input terminal of subelement 122a is switched, the output end of switch element Q1 connects to form switch with the first end of first resistor R1 altogether
The first output end of unit 122a, the second end of first resistor R1 and the second end of the first capacitance C1 connect to form switch subelement altogether
The first end of the second output terminal of 122a, the first capacitance C1 is connect with the low-voltage end of light modulation toning subelement 122b.
It should be noted that in the present embodiment, switch element Q1 is N-type transistor, and the grid of the N-type transistor is should
The control terminal of switch element Q1, the drain electrode of the N-type transistor are the input terminal of switch element Q1, the source electrode of the N-type transistor
For the output end of switch element Q1.
Further, as a preferred embodiment of the present invention, as shown in figure 3, light modulation toning subelement 122b includes light modulation
Mix colours chip U1, and the first pin 1 and the 5th pin 5 of light modulation toning chip U1 are respectively dim toning subelement 122b second
Input terminal and first input end, the third pin 3 and the 4th pin 4 of light modulation toning chip U1 are respectively to dim toning subelement
9th pin 9 of the second output terminal of 122b and the first output end, light modulation toning chip U1 is light modulation toning subelement 122b
The second pin 2 of ground terminal, light modulation toning chip U1 is the low-voltage end of light modulation toning subelement 122b；It should be noted that
In the present embodiment, the bottom legs of light modulation toning chip U1 are to dim the 9th pin 9 of toning chip U1.
Further, as a preferred embodiment of the invention, as shown in figure 3, LED light modulation toning circuits 1 further include electricity
Flow maintenance module 13, the input terminal of electric current maintenance module 13 connect with 11 output end of rectification module, electric current maintenance module 13 it is defeated
Outlet is connect with the first output end of switch subelement 122a；
When reverse-blocking tetrode thyristor module 10 switch to third angle so that rectification module 11 export rectification after cut phase voltage
Less than LED luminescence units 121 conducting voltage when, electric current maintenance module 13 and reverse-blocking tetrode thyristor module 10 form access, to prevent
Only reverse-blocking tetrode thyristor is opened there is scintillation with LED luminescence units 121 in adjustment process；It should be noted that in this implementation
In example, reverse-blocking tetrode thyristor module 10 switches to third angle and refers to that reverse-blocking tetrode thyristor is switched to the second small phase angle, this is second small
Phase angle is less than the first small phase angle, it is preferred that the second small phase angle can be 10% phase, it is notable that work as reverse-blocking tetrode thyristor
When being switched to the second small phase angle, the cut phase voltage of reverse-blocking tetrode thyristor output is less than the conducting voltage of LED luminescence units 121.
Further, as a preferred embodiment of the invention, as shown in figure 3, electric current maintenance module 13 is tieed up including electric current
Chip U2, the 6th resistance R6 and the 7th resistance R7 are held, the first end of the 6th resistance R6 is the input terminal of electric current maintenance module 13,
The second end of 6th resistance R6 maintains the first pin 1 of chip U2 to connect with electric current, and first end and the electric current of the 7th resistance R7 are tieed up
The third pin 3 for holding chip U2 connects, and the second end of the 7th resistance R7 is the output end of electric current maintenance module 13, and electric current maintains core
The second pin 2 of piece U2 is grounded.
Further, as a preferred embodiment of the invention, as shown in figure 3, partial pressure unit 120 includes second resistance
R2,3rd resistor R3 and the second capacitance C2.
Wherein, the first end of second resistance R2 is the input terminal of partial pressure unit 120, second end, the third of second resistance R2
The first end of resistance R3 and the first end of the second capacitance C2 connect the first output end to form partial pressure unit 120,3rd resistor altogether
The second end of R3 and the second end of the second capacitance C2 connect the second output terminal to form partial pressure unit 120 altogether.
Further, as a preferred embodiment of the invention, as shown in Fig. 2, LED luminescence units 121 include first
The input terminal and second of the luminous luminous subelement 121a of subelement 121b, the first LED of the luminous subelement 121a and the 2nd LED of LED
The input terminal of the luminous subelement 121b of LED forms the input terminal of LED luminescence units 121, and the luminous subelement 121a's of the first LED is defeated
Outlet is the first output end of LED luminescence units 121, and the output end of the luminous subelement 121b of the 2nd LED is LED luminescence units
121 second output terminal.
Further, as a preferred embodiment of the invention, as shown in figure 3, the first LED shines, subelement 121a includes
At least one first light emitting diode D1, when the first LED shines subelement 121a including a first light emitting diode D1, the
The anode of one light-emitting diodes D1 pipes is the input terminal of the first light-emitting LED subelement 121a, and the cathode of the first light emitting diode D1 is
The output end of first light-emitting LED subelement 121a；When the luminous subelement 121a of the first LED include multiple first light emitting diode D1
When, the anode of multiple first light emitting diode D1 series connection, first the first light emitting diode D1 is the luminous subelements of the first LED
The input terminal of 121a, the cathode of the last one the first light emitting diode D1 are the output end of the luminous subelement 121a of the first LED.
Refer to it is noted that in the present embodiment, when the first LED subelement 121a that shine include multiple first light-emitting diodes
When pipe D1, multiple first light emitting diode D1 can also use parallel way to connect, and not be limited herein.
The luminous subelement 121b of 2nd LED include at least one second light emitting diode D2, when the luminous sons of the 2nd LED are single
When first 121b includes a second light emitting diode D2, the anode of the second light emitting diode D2 is the second light-emitting LED subelement
The input terminal of 121b, the cathode of the second light emitting diode D2 are the output end of the second light-emitting LED subelement 121b；As the 2nd LED
When the subelement 121b that shines includes multiple second light emitting diode D2, multiple second light emitting diode D2 series connection, first second
The anode of light emitting diode D2 is the input terminal of the luminous subelement 121b of the 2nd LED, the last one the second light emitting diode D2's
Cathode is the output end of the luminous subelement 121b of the 2nd LED.
It is worth noting that, when the luminous subelement 121b of the 2nd LED include multiple second light emitting diode D2, it is multiple
Second light emitting diode D2 can also use parallel way to connect, and not be limited herein.
Furthermore, it is necessary to explanation, in the present embodiment, the first luminous subelement 121a luminescence, the second luminescence unit
121b send out warm light, i.e., the first light emitting diode D1 of at least one of first luminous subelement 121a be emit white light shine
Diode, the second diode D2 of at least one of second luminous subelement 121b are the light emitting diode of Yellow light-emitting low temperature；This
Outside, it is notable that in other embodiments, the first light emitting diode D1 of at least one of first luminous subelement 121a
It can also all glow, the second light emitting diode D2 of at least one of second luminous subelement 121b can also whole greenings
Light；Furthermore the first light emitting diode D1 of at least one of the first luminous subelement 121a can not also be identical, i.e. part
First light emitting diode D1 glows, part the first light emitting diode D1 blue light-emittings, in the second luminous subelement 121b at least
One the second light emitting diode D2 can not also be identical, i.e. the second light emitting diode of part D2 blue light-emittings, and part second is sent out
Optical diode D2 green lights.
Further, as a preferred embodiment of the invention, as shown in Fig. 2, LED luminescence units 121 further include first
Filtering subunit 121c and the second filtering subunit 121d.
Wherein, the input terminal of the luminous subelement 121a of the input terminal of the first filtering subunit 121c, the first LED, the second filter
The input terminal of the luminous subelement 121b of the input terminal and the 2nd LED of marble unit 121d connects to form LED luminescence units 121 altogether
The output end of input terminal, the luminous subelement 121a of output end and the first LED of the first filtering subunit 121c connects to form LED altogether
First output end of luminescence unit 121, the luminous subelement 121b's of output end and the 2nd LED of the second filtering subunit 121d is defeated
Outlet connects the second output terminal to form LED luminescence units 121 altogether.
Specifically, the cut phase electricity after rectifications of the first filtering subunit 121c to flowing through the luminous subelement 121a of the first LED
Pressure is filtered with cut phase electric current；Second filtering subunit 121d shines the rectification of subelement 121b to flowing through the 2nd LED
Cut phase voltage afterwards is filtered with cut phase electric current.
Further, as an of the invention preferred embodiment, as shown in figure 3, the first filtering subunit 121c includes the
Four resistance R4 and third capacitance C3, the second filtering subunit 121d include the 5th resistance R5 and the 4th capacitance C4.
Wherein, the first end of the 4th resistance R4 and the first end of third capacitance C3 connect to form first filtering subunit altogether
The input terminal of 121c, the second end of the 4th resistance R4 connect to form first filtering subunit altogether with the second end of third capacitance C3
The output end of 121c；The first end of 5th resistance R5 connects to form second filtering subunit altogether with the first end of the 4th capacitance C4
The input terminal of 121d, the second end of the 5th resistance R5 connect to form second filtering subunit altogether with the second end of the 4th capacitance C4
The output end of 121d.
Further, it as a preferred embodiment of the invention, shines as shown in Fig. 2, the present invention implements provided LED
Unit 121 further includes isolation subelement 121e.
Wherein, the input terminal of isolation subelement 121e is the input terminal of LED luminescence units 121, isolation subelement 121e's
The input terminal of the luminous subelement 121b of input terminal, the 2nd LED of output end and the luminous subelement 121a of the first LED, the first filtering
The input terminal of the input terminal of subelement 121c and the second filtering subunit 121d connect.
Specifically, filtering of third capacitance C3 and second in 121e couples of the first filtering subunit 121c of isolation subelement are single
The 4th capacitance C4 in first 121d is isolated, and to prevent third capacitance C3 and the 4th capacitance C4 from discharging, and then is avoided because of the
Three capacitance C3 and the 4th caused light-emitting flash of capacitance C4 electric discharges.
Further, as a preferred embodiment of the invention, as shown in figure 3, isolation subelement 121e includes diode
The anode of D3, diode D3 are the input terminal that subelement 121e is isolated, and the cathode of diode D3 is isolation subelement 121e
Output end.
Further, as a preferred embodiment of the present invention, as shown in figure 3, LED provided in an embodiment of the present invention is dimmed
Circuit 1 of mixing colours further includes the 8th resistance R8, and the 8th resistance R8 is connected between reverse-blocking tetrode thyristor and rectification module 11；It needs to illustrate
, in the present embodiment, the 8th resistance R8 is for protecting reverse-blocking tetrode thyristor.
Dim the operation principle of toning circuit to LED provided in an embodiment of the present invention with circuit structure shown in Fig. 3 below
It illustrates, details are as follows：
Firstly, it is necessary to explanation, LED shown in Fig. 3 is dimmed in toning circuit 1 only with a LED light modulation toning mould
For block 12, and the luminous subelement 121a of the first LED in the luminescence unit 121 in LED light modulation toning modules 12 whiten
Light, the luminous subelement 121b Yellow light-emitting low temperatures of the 2nd LED；Secondly, the light modulation toning chip U1 provided in the embodiment of the present invention has two
A current path, first current path are that electric current enters from the first pin 1, are flowed out from third pin 3, second current path
Enter from the 5th pin 5 for electric current, is flowed out from the 4th pin 4.
It is defeated after voltage and electric current the progress rectification that rectification module 11 exports AC power when reverse-blocking tetrode thyristor not cut phase
Go out to LED luminescence units 121 and partial pressure unit 120；Second resistance R2 and 3rd resistor R3 in partial pressure unit 120 is to rectification
Control switch element Q1 enters fully conducting state after the rectified voltage that module 11 exports is divided；LED luminescence units 121 connect
After the rectified voltage and rectified current of receiving rectification module output, sent out respectively by multiple first light emitting diode D1 and multiple second
The rectified current is sent to the first pin 1 and the 5th pin 5 of light modulation toning chip U1 by optical diode D2, so that rectification
Electric current separately flows into the third pin 3 and the 4th pin 4 of light modulation toning chip U1 by the first pin 1 and the 5th pin 5.
After switch element Q1 enters fully conducting state, since the threshold value of the 4th pin 4 of light modulation toning chip U1 is more than
Therefore the threshold value of the third pin 3 of light modulation toning chip U1 flows through multiple second hairs in the luminous subelement 121b of the 2nd LED
The electric current of optical diode D2 is more than the threshold value of third pin 3 with the voltage value obtained by the resistance product of first resistor R1, and then leads
The path blockade between the first pin 1 and third pin 3 of light modulation toning chip U1 is caused, and dim toning chip U1 the 5th draws
Access between foot 5 and the 4th pin 4 is connected, so that the 2nd LED shines, subelement 121b can not form access, to
Multiple second light emitting diode D2 so that the 2nd LED shines in subelement 121b do not shine, and the first luminous subelement 121a,
The 5th pin 5 and the 4th pin 4 and switch element Q1 of light modulation toning chip U1 forms access, so that the first LED is sent out
Multiple first light emitting diode D1 in photon unit 121a shine, i.e., light modulation toning circuit 1 emits white light.
When reverse-blocking tetrode thyristor switches to 50% phase angle, after the voltage after cut phase is carried out rectification by rectification module 11 with electric current
It exports to LED luminescence units 121 and partial pressure unit 120；Second resistance R2 and 3rd resistor R3 in partial pressure unit 120 is to rectification
Control switch element Q1 enters half conducting state after cut phase voltage after the rectification that module 11 exports is divided；LED shines single
Member 121 receives the cut phase voltage after the rectification of rectification module output with after cut phase electric current, passes through multiple first light-emitting diodes respectively
Cut phase electric current after the rectification is sent to the first pin 1 of light modulation toning chip U1 by pipe D1 and multiple second light emitting diode D2
With the 5th pin 5 so that cut phase electric current after rectification separately flows into light modulation toning by the first pin 1 and the 5th pin 5
The third pin 3 and the 4th pin 4 of chip U1.
After switch element Q1 enters half conducting state, the electric current of the 4th pin 4 due to flowing through light modulation toning chip U1
Reduce, so that the resistance value for flowing through the current value and first resistor R1 of the electric current of the 4th pin 4 of light modulation toning chip U1 multiplies
The voltage value of product gained is less than the threshold value of the third pin 3 of light modulation toning chip U1, and therefore, the first of light modulation toning chip U1 draws
Access between foot 1 and third pin 3 is connected, and the access between the 5th pin 5 and the 4th pin 4 of light modulation toning chip U1 is led
Logical, multiple second light emitting diode D2 so that the 2nd LED shines in subelement 121b form access, so that the
Multiple second light emitting diode D2 in the luminous subelement 121b of two LED shine, and the first luminous subelement 121a, light modulation
The 5th pin 5 and the 4th pin 4 and switch element Q1 of toning chip U1 forms access, the son so that the first LED shines
Multiple first light emitting diode D1 in unit 121a shine, i.e. light modulation toning circuit 1 emits white light and yellow light simultaneously.
When reverse-blocking tetrode thyristor switches to 20% phase angle, after the voltage after cut phase is carried out rectification by rectification module 11 with electric current
It exports to LED luminescence units 121 and partial pressure unit 120；Second resistance R2 and 3rd resistor R3 in partial pressure unit 120 is to rectification
Control switch element Q1 enters off-state after cut phase voltage after the rectification that module 11 exports is divided；LED luminescence units
121 receive the cut phase voltage after the rectification of rectification module output with after cut phase electric current, pass through multiple first light emitting diodes respectively
D1 and multiple second light emitting diode D2 by the cut phase electric current after the rectification be sent to the first pin 1 of light modulation toning chip U1 with
5th pin 5, so that the cut phase electric current after rectification separately flows into light modulation toning core by the first pin 1 and the 5th pin 5
The third pin 3 and the 4th pin 4 of piece U1.
After switch element Q1 enters off-state, between the first pin 1 and third pin 3 of light modulation toning chip U1
Access is connected, and the 5th pin 5 of light modulation toning chip U1 is connected with the access between the 4th pin 4, so that the 2nd LED is sent out
Multiple second light emitting diode D2 in photon unit 121b form access, so that the 2nd LED shines in subelement 121b
Multiple second light emitting diode D2 shine；And since switch element Q1 is closed, the first luminous subelement 121a, light modulation
The 5th pin 5 and the 4th pin 4 and switch element Q1 of toning chip U1 can not form access, so that the first LED
Multiple first light emitting diode D1 in luminous subelement 121a do not shine, i.e. light modulation toning circuit 1 while Yellow light-emitting low temperature.
When reverse-blocking tetrode thyristor moment switching to 10% phase angle or lower phase angle, due to the cut phase of reverse-blocking tetrode thyristor output
Voltage is less than the conducting voltage of each light emitting diode in LED luminescence units 121, and therefore, reverse-blocking tetrode thyristor, LED shine single
Member 121 and light modulation toning chip U1 can not form access, and then it is silicon-controlled to cause the current value for flowing through reverse-blocking tetrode thyristor to be less than
The extinction current of switch, so that there is the scintillation of moment in LED luminescence units 121, it is silicon-controlled in order to prevent to open
Pass is not achieved extinction current and so that LED luminescence units 121 generate flicker, and electric current maintains chip U2 to start to work, so that
The formed access of reverse-blocking tetrode thyristor is obtained, to maintain the minimum current of reverse-blocking tetrode thyristor, prevents LED luminescence units 121 from generating
Scintillation；And when reverse-blocking tetrode thyristor works normally, and dims toning chip U1 normal works, since electric current maintains chip U2
Third pin 3 voltage threshold be less than light modulation toning chip U1 third pin 3 voltage threshold, therefore, electric current maintains core
Piece U2 does not work, and does not generate power consumption, improves the efficiency of light modulation toning circuit 1.
Furthermore, it is necessary to which explanation when reverse-blocking tetrode thyristor switches to not inphase angle, flows through LED hairs in the present embodiment
Multiple first light emitting diode D1 in light unit 121 are different from the electric current of the second light emitting diode D2, that is, it is luminous single to flow through LED
The current duty cycle of multiple first light emitting diode D1 and the second light emitting diode D2 in member 121 change, so that
LED luminescence units 121 send out the light of different brightness according to no electric current, to realize the light modulation of LED luminescence units 121, together
The color matching principle for walking LED luminescence units 121 above-mentioned realizes that the synchronous of LED luminescence units 121 is mixed colours and dimmed with this.
Further, the embodiment of the present invention also provides a kind of LED lamp, which includes that above-mentioned LED light modulations are adjusted
Color circuit 1.
In the present invention, it is dimmed by using including reverse-blocking tetrode thyristor module 10, rectification module 11 and at least one LED
The LED for module 12 of mixing colours dims circuit of mixing colours, wherein LED light modulation toning modules 12 include partial pressure unit 120, the luminous lists of LED
Member 121 and switch unit 122, the voltage that reverse-blocking tetrode thyristor module 10 export AC power with it is defeated after electric current progress cut phase
Go out corresponding cut phase electric current and cut phase voltage to rectification module 11, rectification module 11 carries out rectification to cut phase electric current and cut phase voltage
After export to LED luminescence units 121 and partial pressure unit 120, partial pressure unit 120 is defeated after being divided to the cut phase voltage after rectification
Go out to switch unit 122, switch unit 122 controls LED luminescence units 121 cutting after rectification according to the cut phase voltage after partial pressure
It shines according to corresponding bright and coloration under phase current effect, realizes the toning and light modulation of LED luminescence units 121, and then solve
Existing LED illumination source of having determined has that cannot be carried out at the same time brightness regulation and coloration is adjusted.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (11)
1. a kind of LED light modulation toning circuit, including reverse-blocking tetrode thyristor module and rectification module, the reverse-blocking tetrode thyristor module it is defeated
Enter end connect with the first end of external AC power, the of the output end of the reverse-blocking tetrode thyristor module and the rectification module
One input terminal connects, and the second input terminal of the rectification module is connect with the second end of the AC power, the rectification module
Ground terminal ground connection, which is characterized in that LED light modulation toning circuit further includes at least one LED light modulations toning module, described
LED light modulation toning modules include partial pressure unit, LED luminescence units and switch unit；
The input terminal of the LED light modulations toning module is connect with the output end of the rectification module, the LED light modulations toning module
Output end ground connection, the input terminal of the input terminal of the partial pressure unit and the LED luminescence units connects altogether to be formed the LED and dims
The input terminal for module of mixing colours, the first output end of the LED luminescence units are connect with the first input end of the switch unit, institute
The second output terminal for stating LED luminescence units is connect with the second input terminal of the switch unit, and the first of the partial pressure unit is defeated
Outlet is connect with the control terminal of the switch unit, the second output terminal of the output end of the switch unit and the partial pressure unit
The output end to form the LED light modulations toning module is connect altogether；
The reverse-blocking tetrode thyristor module exports corresponding cut phase after carrying out cut phase with electric current to the voltage that the AC power exports
Electric current and cut phase voltage to the rectification module, the rectification module carry out rectification to the cut phase electric current and the cut phase voltage
After export to the LED luminescence units and the partial pressure unit, the partial pressure unit divides the cut phase voltage after rectification
After export to the switch unit, the switch unit controls the LED luminescence units whole according to the cut phase voltage after partial pressure
It shines according to corresponding bright and coloration under the cut phase function of current after stream；
Wherein, the switch unit includes switch subelement and light modulation toning subelement；
It is described switch subelement control terminal be the switch unit control terminal, it is described switch subelement input terminal with it is described
Dim the first output end connection of toning subelement, the first output end and the light modulation toning subelement of the switch subelement
Second output terminal connection, the second output terminal of the switch subelement is the output end of the switch unit, light modulation tune
The first input end of dice unit is the first input end of the switch unit, the second input terminal of the light modulation toning subelement
For the second input terminal of the switch unit, the ground terminal ground connection of the light modulation toning subelement；
When the reverse-blocking tetrode thyristor module not cut phase, the branch pressure voltage for switching subelement and being exported according to the partial pressure unit
Into the first working condition, and according to first working condition export first control signal to the light modulation toning subelement,
Light modulation toning subelement according to the first control signal control the LED luminescence units according to corresponding bright and coloration into
Row shines；
When the reverse-blocking tetrode thyristor module carries out first angle cut phase, the switch subelement is exported according to the partial pressure unit
Partial pressure after cut phase voltage enter the second working condition, and second control signal is exported to institute according to second working condition
Light modulation toning subelement is stated, the light modulation toning subelement controls the LED luminescence units according to the second control signal and presses
It shines according to corresponding bright and coloration；
When the reverse-blocking tetrode thyristor module carries out second angle cut phase, the switch subelement is exported according to the partial pressure unit
Partial pressure after cut phase voltage enter third working condition, and third is exported according to the third working condition and controls signal to institute
Light modulation toning subelement is stated, the light modulation toning subelement controls the signal control LED luminescence units according to the third and presses
It shines according to corresponding bright and coloration.
2. LED light modulations toning circuit according to claim 1, which is characterized in that the switch subelement includes switch member
Part, first resistor and the first capacitance；
The control terminal of the switch element is the control terminal of the switch subelement, and the input terminal of the switch element is described opens
The first end of the input terminal of climax unit, the output end of the switch element and the first resistor connects to form switch altogether
The second end of first output end of unit, the second end of the first resistor and first capacitance connects to form switch altogether
The second output terminal of unit, the first end of first capacitance are connect with the low-voltage end of the light modulation toning subelement.
3. LED light modulations toning circuit according to claim 2, which is characterized in that the light modulation toning subelement includes adjusting
Light toning chip, the first pin and the 5th pin of the light modulation toning chip are respectively the second of the light modulation toning subelement
Input terminal and first input end, the third pin and the 4th pin of the light modulation toning chip are respectively that light modulation toning is single
9th pin of the second output terminal and the first output end of member, the light modulation toning chip is connecing for the light modulation toning subelement
Ground terminal, the second pin of the light modulation toning chip are the low-voltage end of the light modulation toning subelement.
4. LED light modulations toning circuit according to claim 2 or 3, which is characterized in that the LED light modulations toning circuit is also
Including electric current maintenance module, the input terminal of the electric current maintenance module is connect with the rectification module output end, the electric current dimension
The output end for holding module is connect with the first output end of the switch subelement；
When the reverse-blocking tetrode thyristor module switch to third angle so that the rectification module output rectification after cut phase voltage
Less than the LED luminescence units conducting voltage when, the electric current maintenance module and the reverse-blocking tetrode thyristor module form access.
5. LED light modulations toning circuit according to claim 4, which is characterized in that the electric current maintenance module includes electric current
It is the input terminal of the electric current maintenance module to maintain chip, the 6th resistance and the 7th resistance, the first end of the 6th resistance,
The second end of 6th resistance maintains the first pin of chip to connect with the electric current, and the electric current maintains the third of chip to draw
Foot is connect with the first end of the 7th resistance, and the second end of the 7th resistance is the output end of the electric current maintenance module,
The electric current maintains the second pin ground connection of chip.
6. LED according to claim 1 light modulation toning circuit, which is characterized in that the partial pressure unit include second resistance,
3rd resistor and the second capacitance；
The first end of the second resistance is the input terminal of the partial pressure unit, the second end of the second resistance, the third
The first end of resistance and the first end of second capacitance connect the first output end to form the partial pressure unit, the third altogether
The second end of resistance and the second end of second capacitance connect the second output terminal to form the partial pressure unit altogether.
7. LED light modulations toning circuit according to claim 1, which is characterized in that the LED luminescence units include first
The luminous subelements of LED and the luminous subelements of the 2nd LED, the input terminal of the luminous subelements of the first LED are sent out with the 2nd LED
The input terminal of photon unit forms the input terminal of the LED luminescence units, and the output end of the luminous subelements of the first LED is institute
State the first output end of LED luminescence units, the shine output ends of subelement of the 2nd LED are the of the LED luminescence units
Two output ends.
8. LED light modulations toning circuit according to claim 7, which is characterized in that the LED luminescence units further include first
Filtering subunit and the second filtering subunit；
The input terminal of the luminous subelement of the input terminal of first filtering subunit, the first LED, the second filtering are single
The input terminal of the luminous subelement of input terminal and the 2nd LED of member connects the input terminal to form the LED luminescence units altogether, institute
The output end of the output end and the luminous subelements of the first LED of stating the first filtering subunit connects to form the luminous lists of the LED altogether
First output end of member, the output end of second filtering subunit and the output end of the luminous subelements of the 2nd LED connect altogether
Form the second output terminal of the LED luminescence units；
Cut phase voltage after the rectification of first filtering subunit to flowing through the luminous subelements of the first LED and cut phase
Electric current is filtered；After the rectification of second filtering subunit to flowing through the luminous subelements of the 2nd LED
Cut phase voltage is filtered with cut phase electric current.
9. LED according to claim 8 light modulation toning circuit, which is characterized in that first filtering subunit includes the
Four resistance and third capacitance, second filtering subunit include the 5th resistance and the 4th capacitance；
The first end of 4th resistance and the first end of the third capacitance connect to form the defeated of first filtering subunit altogether
Enter end, the second end of the 4th resistance and the second end of the third capacitance connect to form the defeated of first filtering subunit altogether
Outlet；The first end of 5th resistance and the first end of the 4th capacitance connect to form the defeated of second filtering subunit altogether
Enter end, the second end of the 5th resistance and the second end of the 4th capacitance connect to form the defeated of second filtering subunit altogether
Outlet.
10. LED according to claim 9 light modulation toning circuit, which is characterized in that the LED luminescence units further include every
Ion unit；
It is described isolation subelement input terminal be the LED luminescence units input terminal, it is described isolation subelement output end with
Input terminal, the first filtering of the luminous subelement of input terminal, the 2nd LED of the luminous subelements of first LED are single
The input terminal of member and the input terminal connection of second filtering subunit；
The isolation subelement is to the in third capacitance and second filtering subunit in first filtering subunit
Four capacitances are isolated.
11. a kind of LED lamp, which is characterized in that the LED lamp further includes LED as described in any one of claim 1 to 10
Light modulation toning circuit.
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| CN201610798715.5A CN106211486B (en) | 2016-08-31 | 2016-08-31 | A kind of LED lamp and its light modulation toning circuit |
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| CN201610798715.5A CN106211486B (en) | 2016-08-31 | 2016-08-31 | A kind of LED lamp and its light modulation toning circuit |
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| CN104540287A (en) * | 2012-10-30 | 2015-04-22 | 四川新力光源股份有限公司 | LED dimming driving circuit |
| CN105657909A (en) * | 2016-03-25 | 2016-06-08 | 深圳市明微电子股份有限公司 | Linear LED drive circuit capable of achieving light and color adjustment |
| CN105657932A (en) * | 2014-12-04 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source drive circuit and brightness and color temperature controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014103078A (en) * | 2012-11-22 | 2014-06-05 | Gold King Kk | Led light dimming circuit for vehicle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540287A (en) * | 2012-10-30 | 2015-04-22 | 四川新力光源股份有限公司 | LED dimming driving circuit |
| CN105657932A (en) * | 2014-12-04 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source drive circuit and brightness and color temperature controller |
| CN105657909A (en) * | 2016-03-25 | 2016-06-08 | 深圳市明微电子股份有限公司 | Linear LED drive circuit capable of achieving light and color adjustment |
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