CN110312339A - A kind of LED lamp circuit of tunable optical - Google Patents
A kind of LED lamp circuit of tunable optical Download PDFInfo
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- CN110312339A CN110312339A CN201910436947.XA CN201910436947A CN110312339A CN 110312339 A CN110312339 A CN 110312339A CN 201910436947 A CN201910436947 A CN 201910436947A CN 110312339 A CN110312339 A CN 110312339A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 239000003990 capacitor Substances 0.000 claims description 62
- 230000005611 electricity Effects 0.000 claims description 14
- 238000011084 recovery Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 claims description 4
- 230000003760 hair shine Effects 0.000 claims description 4
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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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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- 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]
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- 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
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Abstract
The invention discloses a kind of LED lamp circuits of tunable optical, including rectification circuit, LED illuminating circuit, unidirectional through-flow circuit, filter circuit, constant-current control circuit and time voltage conversion circuit, rectification circuit connects intelligent dimming controller, in a period of change of line voltage, even if the output end of intelligent dimming controller is kept on, there are two export current status for its output end: the state that the state and output electric current that output electric current is not zero are zero, the low-voltage moment that intelligent dimming controller is zero in output electric current, mains AC is pressed and carries out chop control, by controlling copped wave time size, control signal is sent to LED lamp circuit；Advantage is can be compatible with intelligent dimming controller and intelligent dimming controller to constitute an intelligent illuminating system, for improving the market competitiveness of light-adjustable LED lamp, expands its application prospect and is of great significance.
Description
Technical field
The present invention relates to a kind of LED lamp circuits, more particularly, to a kind of LED lamp circuit of tunable optical.
Background technique
Currently, the working principle of light-adjustable LED lamp is to carry out chop control, adjustment by the sine voltage to input terminal
The effective voltage of input terminal makes light-adjustable LED lamp issue corresponding input effective to control the input power of light-adjustable LED lamp
The brightness of voltage.Light-adjustable LED lamp includes the LED lamp circuit of bracket and rack-mount tunable optical, the LED light of tunable optical
Circuit is the main part of light-adjustable LED lamp, and the performance of light-adjustable LED lamp directly depends on the property of the LED lamp circuit of tunable optical
Energy.
The structural block diagram of the LED lamp circuit of existing tunable optical is as shown in Figure 1, it mainly includes rectification circuit, light modulation
With circuit, dimming control circuit, stroboscopic circuit and LED illuminating circuit are removed, there is rectification circuit firewire input terminal, zero curve to input
End, output and ground, light modulation match circuit have anode and cathode, and dimming control circuit has input, output end
And ground terminal, go stroboscopic circuit have anode and cathode, LED illuminating circuit have anode and cathode, the output end of rectification circuit,
Dim the anode of match circuit, dimming control circuit input terminal with go the cathode of stroboscopic circuit connect, tunable optical control is electric
The anode connection of the output end and LED illuminating circuit on road, the cathode of LED illuminating circuit and the anode connection for removing stroboscopic circuit, it is whole
The ground terminal of current circuit, the ground terminal for dimming match circuit are connected with the ground terminal of dimming control circuit.
Light adjusting controller, the firewire input terminal of the rectification circuit of the LED lamp circuit of tunable optical are connected on the firewire of alternating current
By connecting alternating current firewire with light adjusting controller, the zero curve input terminal of the rectification circuit of the LED lamp circuit of tunable optical is directly and city
The connection of electrical zero line.The no-voltage moment is pressed through in mains AC, light adjusting controller can be automatically shut down, and need ability after retriggered
It is connected again.By adjusting light adjusting controller shutdown to the time of triggering and conducting, may be implemented to the alternating voltage of city's electricity output (just
String wave) chopper regulation is carried out, so that the effective voltage size of the rectification circuit access of the LED lamp circuit of tunable optical is controlled, thus
Change the light emission luminance of light-adjustable LED lamp.Pulsating dc voltage is transformed to after rectification circuit by the alternating voltage of copped wave
The pulsating dc voltage inputted in it is converted to DC current of corresponding size and exported to LED by output, dimming control circuit
Illuminating circuit, then via stroboscopic circuit is removed after, make LED illuminating circuit shine.
The LED lamp circuit of existing tunable optical mainly cooperates traditional light adjusting controller to use, and traditional brightness adjustment control
Device is although many kinds of, but is designed for incandescent lamp.It is traditional with the popularization of intelligent dimming control technology
The light-dimming method of light adjusting controller cannot increasingly be met the needs of users, and intelligent dimming controller has intelligence communication
With the function of remote control, and light-modulating mode is more, and traditional light adjusting controller is replaced in some applications.General intelligence
Light adjusting controller usually has firewire input terminal, zero curve input terminal, the first output end and second output terminal, intelligent dimming controller
Firewire input terminate on alternating current firewire, the input of the zero curve of intelligent dimming controller terminates on alternating current zero curve, it is existing can
The LED lamp circuit of light modulation is because have light modulation match circuit, when power consumption is larger and intelligent dimming controller is used cooperatively together,
Due best use effect cannot be reached.
In view of this, the LED lamp circuit for designing a kind of tunable optical that can be compatible with intelligent dimming controller, for improving tunable optical
The market competitiveness of LED light expands its application prospect and is of great significance.
Summary of the invention
Technical problem to be solved by the invention is to provide the LED that one kind can be compatible with the tunable optical of intelligent dimming controller
Circuit for lamp, the intelligent dimming controller send at the time of the input current of Dimmable LED circuit for lamp is zero and adjust LED light electricity
The control signal of road brightness automatically adjusts the brightness of the Dimmable LED circuit for lamp.
The technical scheme of the invention to solve the technical problem is: a kind of LED lamp circuit of tunable optical, including it is whole
Current circuit and LED illuminating circuit, the LED lamp circuit of the tunable optical further include unidirectional through-flow circuit, filter circuit, constant current control
Circuit and time voltage conversion circuit processed, the rectification circuit connect intelligent dimming controller, which will
The voltage that mains voltage exports after copped wave is handled includes to be in the no-voltage at no-voltage moment and in non-zero voltage
The non-zero voltage at moment；The filter circuit has energy storage effect, and the dimming LED lamp circuit is controlled by intelligent dimming
After device is linked into alternating current, the filter circuit both end voltage maintains always more than half of mains Voltage Peak value, when
Mains voltage passes through the intelligent dimming controller and the rectification circuit, and the output electricity of the rectification circuit
When pressure is less than the filter circuit both end voltage, the input current of the rectification circuit is zero；Work as mains AC
Pressure passes through intelligent dimming controller and the rectification circuit, and the output voltage of the rectification circuit is more than or equal to described
The voltage at filter circuit both ends, the one-way conduction circuit conducting while charging to the filter circuit, are returned described
Constant-current control circuit provide operating voltage, at this point, the input current of the rectification circuit is not zero, it follows that in city
In one period of change of piezoelectric voltage, even if the output end of intelligent dimming controller is kept on, output end has two
A output current status: defeated at the time of the alternating voltage absolute value of input is more than or equal to the filter circuit both end voltage
Electric current is not zero out state and input alternating voltage absolute value be less than it is described can filter circuit both end voltage when, output
The state that electric current is zero at the low-voltage moment that intelligent dimming controller is zero in output electric current, is cut mains AC pressure
Wave control sends control signal to the LED lamp circuit by controlling copped wave time size；
The maximum copped wave time of the intelligent dimming controller is denoted as Tm, the copped wave of the intelligent dimming controller
Control time t is adjusted 0 between Tm, and the sine wave period of mains voltage is denoted as 2T, then the rectification circuit is defeated
Out be the pulse voltage for being T in the period by the pulsating dc voltage that wave is cut, comprising the time be t in the pulse voltage each period
No-voltage and the time be T-t non-zero voltage, be provided in the constant-current control circuit for controlling the LED hair
The lower limit of the control voltage range is denoted as V1 by the control voltage range of optical circuit luminous intensity, and the upper limit is denoted as V2；When described
Between voltage conversion circuit the periodically variable pulse voltage of access according to the ratio of (T-t)/T, export the straight of corresponding size
Flow control voltage, the constant-current control circuit access direct-current control voltage, when the direct-current control voltage is less than
When V1, the constant-current control circuit cut-off, the LED illuminating circuit does not shine, when the direct-current control voltage is greater than
When equal to V1 and being less than or equal to V2, the constant-current control circuit conducting, the output DC current control LED illuminating circuit
It shines, and the DC current is increased up its maximum value with the raising of the direct-current control voltage, the LED shines
The luminous intensity of circuit enhances with the increase of the DC current, described when the direct-current control voltage is greater than V2
The DC current of constant-current control circuit output keeps maximum value constant, and the luminous intensity of the LED illuminating circuit is maximum.
The rectification circuit has firewire input terminal, zero curve input, output end and ground terminal, and described is unidirectional through-flow
Circuit has anode and cathode with anode and cathode, the filter circuit, and the LED illuminating circuit has positive and negative
Pole, the constant-current control circuit have input, output end, control terminal and ground terminal, the time voltage conversion circuit
With anode, input, output end and ground terminal, the output end of the rectification circuit, the time voltage conversion circuit
Input terminal and the unidirectional through-flow circuit anode connection, the cathode of the unidirectional through-flow circuit, the filtered electrical
The anode and the LED hair of the input terminal of positive, described constant-current control circuit on road, the time voltage conversion circuit
The anode connection of optical circuit, the output end of the constant-current control circuit is connected with the cathode of the LED illuminating circuit, described
The output end of time voltage conversion circuit connected with the control terminal of the constant-current control circuit, the rectification circuit connects
Ground terminal, the ground terminal of the time voltage conversion circuit, the ground terminal of the filter circuit and the current constant control are electric
The ground terminal on road connects.
The time voltage conversion circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th electricity
Resistance, the 6th resistance, first capacitor, the second capacitor, first diode, the second diode, third diode and the first triode, institute
The first capacitor stated is electrolytic capacitor, and second diode is zener diode, and first triode is positive-negative-positive three
Pole pipe, the first diode and the third diode are rectifier diode, and one end of the first resistor is institute
The input terminal for the time voltage conversion circuit stated, one end, described of the other end of the first resistor, the second resistance
The anode of first diode connected with the base stage of first triode, when one end of the 3rd resistor is described
Between voltage conversion circuit anode, the other end of the 3rd resistor, one end of the 4th resistance, the described the 1st
The cathode of pole pipe is connected with the cathode of second diode, the other end, the 5th resistance of the 4th resistance
One end connected with the emitter of first triode, the other end of the 5th resistance, the first capacitor
The anode connection of positive and described third diode, one end of the cathode of the third diode, second capacitor
It is connected with one end of the 6th resistance and its connecting pin is the output end of the time voltage conversion circuit, described the
The other end of two resistance, the current collection of first triode, the cathode of the first capacitor, second capacitor it is another
One end is connected with the other end of the 6th resistance and its connecting pin is the ground terminal of time voltage conversion circuit.The circuit is adopted
Repertoire is realized with discrete component, and reliability is higher, and cost is relatively low.
The constant-current control circuit includes the first chip, the 7th resistance, the 8th resistance, the 9th electricity of model MT7816
Resistance, third capacitor, the 4th diode, the 4th capacitor and the first inductance, the 4th diode are fast-recovery commutation diode,
4th capacitor is electrolytic capacitor, one end of the 7th resistance, the cathode of the 4th diode and described
4th capacitor anode connection and its connecting pin be the constant-current control circuit input terminal, the 7th resistance it is another
End, the third capacitor one end connected with the 4th foot of first chip, the 2nd foot of first chip is institute
3rd foot of the control terminal for the constant-current control circuit stated, first chip is connected with one end of the 8th resistance, described
The 8th foot of the first chip connected with one end of the 9th resistance, it is the 5th foot of first chip, the 6th foot, described
The anode of the 4th diode connected with one end of first inductance, the other end of first inductance and described the
The cathode of four capacitors connects and its connecting pin is the output end of the constant-current control circuit, the third capacitor it is another
End, the other end of the 8th resistance, the 9th resistance the other end connected with the 1st foot of first chip and
Its connecting pin is the ground terminal of the constant-current control circuit.The circuit performance is reliable, at low cost.
The unidirectional through-flow circuit includes the 5th diode, and the 5th diode is fast-recovery commutation diode,
The anode of the just extremely described unidirectional through-flow circuit of 5th diode, the cathode of the 5th diode is described
Unidirectional through-flow circuit cathode.
The filter circuit includes the 5th capacitor, and the 5th capacitor is electrolytic capacitor, the 5th capacitor
The just anode of the extremely described filter circuit, the cathode of the 5th capacitor are the ground terminal of the filter circuit.
The rectification circuit realizes that the 1st foot of the full bridge rectifier bridge heap is described using full bridge rectifier bridge heap
The firewire input terminal of rectification circuit, the 3rd foot of the full bridge rectifier bridge heap are the zero curve input terminal of the rectification circuit, institute
2nd foot of the full bridge rectifier bridge heap stated is the output end of the rectified current terminal, and the 4th foot of the full bridge rectifier bridge heap is
The ground terminal of the rectification circuit.
Compared with the prior art, the advantages of the present invention are as follows by the way that unidirectional through-flow circuit, filter circuit, current constant control is arranged
Circuit and time voltage conversion circuit, rectification circuit connect intelligent dimming controller, and the intelligent dimming controller is by mains
The voltage that voltage exports after copped wave is handled includes in the no-voltage at no-voltage moment and non-in the non-zero voltage moment
No-voltage；Filter circuit has energy storage effect, after dimming LED lamp circuit is linked into alternating current by intelligent dimming controller, filtering
Circuit both end voltage maintains always more than half of mains Voltage Peak value, when mains voltage passes through intelligent dimming control
Device and rectification circuit processed, and the output voltage of rectification circuit be less than filter circuit both end voltage when, the input of rectification circuit
Electric current is zero；When mains voltage passes through intelligent dimming controller and rectification circuit, and the output voltage of rectification circuit is greater than
Equal to the voltage at filter circuit both ends, one-way conduction circuit conducting returns constant-current control circuit while charging to filter circuit
Operating voltage is provided, at this point, the input current of rectification circuit is not zero, it follows that in a period of change of line voltage
Interior, even if the output end of intelligent dimming controller is kept on, there are two export current status for output end: inputting
Alternating voltage absolute value at the time of be more than or equal to filter circuit both end voltage, the state that is not zero of output electric current and in input
When alternating voltage absolute value is less than filter circuit both end voltage, the state that output electric current is zero, intelligent dimming controller is being exported
The low-voltage moment that electric current is zero presses mains AC and carries out chop control, by controlling copped wave time size, to LED light
Circuit sends control signal；The maximum copped wave time of intelligent dimming controller is denoted as Tm, the copped wave control of intelligent dimming controller
Time t processed is adjusted 0 between Tm, and the sine wave period of mains voltage is denoted as 2T, then the process of rectification circuit output
The pulsating dc voltage that wave is cut is the pulse voltage for being T in the period, the no-voltage for being t comprising the time in the pulse voltage each period
And the time is the non-zero voltage of T-t, and the control for controlling LED illuminating circuit luminous intensity is provided in constant-current control circuit
The lower limit of the control voltage range is denoted as V1 by voltage range, and the upper limit is denoted as V2；Period of the time voltage conversion circuit access
Property variation pulse voltage according to the ratio of (T-t)/T, export the direct-current control voltage of corresponding size, constant-current control circuit access
Direct-current control voltage, when direct-current control voltage is less than V1, constant-current control circuit cut-off, LED illuminating circuit does not shine, and works as direct current
Voltage is controlled more than or equal to V1 and when being less than or equal to V2, constant-current control circuit conducting, output DC current controls LED illuminating circuit
It shines, and the DC current is increased up its maximum value with the raising of the direct-current control voltage, LED illuminating circuit
Luminous intensity enhances with the increase of the DC current, when direct-current control voltage is greater than V2, constant-current control circuit output
DC current keeps maximum value constant, and the luminous intensity of the LED illuminating circuit is maximum；Thus the present invention can be compatible with intelligence
Light adjusting controller and intelligent dimming controller constitute an intelligent illuminating system, for improving the market competition of light-adjustable LED lamp
Power expands its application prospect and is of great significance.
Detailed description of the invention
Fig. 1 is the structural block diagram of the LED lamp circuit of existing tunable optical；
Fig. 2 is the structural block diagram of the LED lamp circuit of tunable optical of the invention；
Fig. 3 is the circuit diagram of the LED lamp circuit of tunable optical of the invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in Fig. 2, a kind of LED lamp circuit of tunable optical, including rectification circuit and LED illuminating circuit, it can
The LED lamp circuit of light modulation further includes unidirectional through-flow circuit, filter circuit, constant-current control circuit and time voltage conversion circuit, whole
Current circuit connects intelligent dimming controller, the electricity which exports mains voltage after copped wave is handled
Briquetting contains the no-voltage in the no-voltage moment and the non-zero voltage in the non-zero voltage moment；Filter circuit is made with energy storage
With after dimming LED lamp circuit is linked into alternating current by intelligent dimming controller, filter circuit both end voltage maintains always alternating current
More than half of alternating voltage peak, when mains voltage passes through intelligent dimming controller and rectification circuit, and rectification circuit
Output voltage be less than filter circuit both end voltage when, the input current of rectification circuit is zero；When mains voltage passes through
Intelligent dimming controller and rectification circuit are crossed, and the output voltage of rectification circuit is more than or equal to the voltage at filter circuit both ends, it is single
It is connected to turning circuit, while charging to filter circuit, returns constant-current control circuit and operating voltage is provided, at this point, rectified current
The input current on road is not zero, it follows that in a period of change of line voltage, the output end of intelligent dimming controller
Even if being kept on, there are two export current status for output end: being more than or equal in the alternating voltage absolute value of input
At the time of filter circuit both end voltage, state and be less than filtered electrical in the alternating voltage absolute value of input that output electric current is not zero
When the both end voltage of road, the state that output electric current is zero, the low-voltage moment that intelligent dimming controller is zero in output electric current, to city
Electric alternating voltage carries out chop control, by controlling copped wave time size, sends control signal to LED lamp circuit；By intelligent tune
The maximum copped wave time of optical controller is denoted as Tm, and the chop control time t of intelligent dimming controller is adjusted 0 between Tm, will
The sine wave period of mains voltage is denoted as 2T, then rectification circuit output is the period to be by the pulsating dc voltage that wave is cut
The pulse voltage of T, the non-zero voltage that the pulse voltage each period interior no-voltage and time for being t comprising the time is T-t are permanent
The control voltage range for controlling LED illuminating circuit luminous intensity is provided in flow control circuit, by the control voltage range
Lower limit be denoted as V1, the upper limit is denoted as V2；Time voltage conversion circuit is the periodically variable pulse voltage of access according to (T-
T)/T ratio, exports the direct-current control voltage of corresponding size, and constant-current control circuit accesses direct-current control voltage, works as DC control
When voltage is less than V1, constant-current control circuit cut-off, LED illuminating circuit do not shine, when direct-current control voltage is more than or equal to V1 and small
In be equal to V2 when, constant-current control circuit conducting, output DC current control LED illuminating circuit shine, and the DC current with
The raising of direct-current control voltage and be increased up its maximum value, the luminous intensity of LED illuminating circuit with the DC current increasing
Add and enhance, when direct-current control voltage is greater than V2, the DC current of constant-current control circuit output keeps maximum value constant, LED
The luminous intensity of illuminating circuit is maximum.
As shown in Fig. 2, rectification circuit has firewire input terminal, zero curve input, output end and ground connection in the present embodiment
End, unidirectional through-flow circuit have anode and cathode with anode and cathode, filter circuit, and LED illuminating circuit has positive and negative
Pole, constant-current control circuit have input, output end, control terminal and ground terminal, and time voltage conversion circuit has anode, input
End, output and ground, the output end of rectification circuit, the input terminal of time voltage conversion circuit and unidirectional through-flow circuit are just
Pole connection, the unidirectional cathode of through-flow circuit, the anode of filter circuit, the input terminal of constant-current control circuit, time voltage conversion electricity
The anode connection of the anode and LED illuminating circuit on road, the output end of constant-current control circuit are connected with the cathode of LED illuminating circuit,
The output end of time voltage conversion circuit is connected with the control terminal of constant-current control circuit, ground terminal, the time voltage of rectification circuit
Ground terminal, the ground terminal of filter circuit of conversion circuit are connected with the ground terminal of constant-current control circuit.
Embodiment two: the present embodiment is basically the same as the first embodiment, and difference is:
As shown in figure 3, time voltage conversion circuit includes first resistor R1, second resistance R2, third electricity in the present embodiment
Hinder R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, first capacitor C1, the second capacitor C2, first diode D1, second
Diode D2, third diode D3 and the first triode Q1, first capacitor C1 are electrolytic capacitor, and the second diode D2 is pressure stabilizing two
Pole pipe, the first triode Q1 are PNP type triode, and first diode D1 and third diode D3 are rectifier diode, the first electricity
The one end for hindering R1 is the input terminal of time voltage conversion circuit, the other end of first resistor R1, one end of second resistance R2, first
The anode of diode D1 is connected with the base stage of the first triode Q1, one end of 3rd resistor R3 for time voltage conversion circuit just
Pole, the other end of 3rd resistor R3, one end of the 4th resistance R4, the cathode of first diode D1 and the second diode D2 cathode
Connection, the other end of the 4th resistance R4, one end of the 5th resistance R5 are connected with the emitter of the first triode Q1, the 5th resistance R5
The other end, first capacitor C1 anode and third diode D3 anode connection, cathode, the second capacitor of third diode D3
One end of C2 is connected with one end of the 6th resistance R6 and its connecting pin is the output end of time voltage conversion circuit, second resistance R2
The other end, the current collection of the first triode Q1, the cathode of first capacitor C1, the other end of the second capacitor C2 and the 6th resistance R6
Other end connection and its connecting pin are the ground terminal of time voltage conversion circuit.
As shown in figure 3, constant-current control circuit includes the first chip U1 of model MT7816, the 7th electricity in the present embodiment
R7, the 8th resistance R8, the 9th resistance R9, third capacitor C3, the 4th diode D4, the 4th capacitor C4 and the first inductance L1 are hindered, the
Four diode D4 are fast-recovery commutation diode, and the 4th capacitor C4 is electrolytic capacitor, one end of the 7th resistance R7, the 4th diode
The anode of the cathode of D4 and the 4th capacitor C4 connect and its connecting pin is the input terminal of constant-current control circuit, and the 7th resistance R7's is another
One end, third capacitor C3 one end connected with the 4th foot of the first chip U1, the 2nd foot of the first chip U1 is constant-current control circuit
Control terminal, one end connection of the 3rd foot of the first chip U1 and the 8th resistance R8, the 8th foot and the 9th resistance of the first chip U1
One end of R9 connects, the 5th foot of the first chip U1, the 6th foot, the anode of the 4th diode D4 and the first inductance L1 one end connect
It connecing, the cathode connection of the other end of the first inductance L1 and the 4th capacitor C4 and its connecting pin are the output end of constant-current control circuit,
The other end of third capacitor C3, the other end of the 8th resistance R8, the other end of the 9th resistance R9 and the first chip U1 the 1st foot connect
It connects and its connecting pin is the ground terminal of constant-current control circuit.
As shown in figure 3, unidirectional through-flow circuit includes the 5th diode D5 in the present embodiment, the 5th diode D5 is fast extensive
Multiple rectifier diode, the anode of the just extremely unidirectional through-flow circuit of the 5th diode D5, the cathode of the 5th diode D5 is unidirectional
The cathode of through-flow circuit.
As shown in figure 3, in the present embodiment, filter circuit includes the 5th capacitor C5, and the 5th capacitor C5 is electrolytic capacitor, the 5th
The just extremely anode of filter circuit of capacitor C5, the cathode of the 5th capacitor C5 are the ground terminal of filter circuit.
As shown in figure 3, rectification circuit is realized using full bridge rectifier bridge heap Db, full bridge rectifier bridge heap Db's in the present embodiment
1st foot is the firewire input terminal of rectification circuit, and the 3rd foot of full bridge rectifier bridge heap Db is the zero curve input terminal of rectification circuit, full-bridge
The 2nd foot of rectifier bridge stack Db is the output end of rectified current terminal, and the 4th foot of full bridge rectifier bridge heap Db is the ground connection of rectification circuit
End.
Claims (7)
1. a kind of LED lamp circuit of tunable optical, including rectification circuit and LED illuminating circuit, it is characterised in that the tunable optical
LED lamp circuit further include unidirectional through-flow circuit, filter circuit, constant-current control circuit and time voltage conversion circuit, it is described
Rectification circuit connects intelligent dimming controller, what which exported mains voltage after copped wave is handled
Voltage includes the no-voltage in the no-voltage moment and the non-zero voltage in the non-zero voltage moment；The filter circuit has
Energy storage effect, after the dimming LED lamp circuit is linked into alternating current by intelligent dimming controller, the filter circuit both ends
Voltage maintains always more than half of mains Voltage Peak value, when mains voltage is controlled by the intelligent dimming
Device and the rectification circuit, and the output voltage of the rectification circuit be less than the filter circuit both end voltage when
It waits, the input current of the rectification circuit is zero；When mains voltage passes through intelligent dimming controller and the rectification
Circuit, and the output voltage of the rectification circuit is more than or equal to the voltage at the filter circuit both ends, described unidirectionally leads
Circuit passband conducting while charging to the filter circuit, returns the constant-current control circuit and provides operating voltage, this
When, the input current of the rectification circuit is not zero, it follows that intelligence is adjusted in a period of change of line voltage
Even if the output end of optical controller is kept on, there are two export current status for output end: in the alternating current of input
At the time of pressing absolute value to be more than or equal to the filter circuit both end voltage, the state that output electric current is not zero and the friendship in input
When flowing absolute value of voltage less than the filter circuit both end voltage, the state that output electric current is zero, intelligent dimming controller exists
The low-voltage moment that electric current is zero is exported, mains AC is pressed and carries out chop control, by controlling copped wave time size, to institute
The LED lamp circuit stated sends control signal；
The maximum copped wave time of the intelligent dimming controller is denoted as Tm, the chop control of the intelligent dimming controller
Time t is adjusted 0 between Tm, and the sine wave period of mains voltage is denoted as 2T, then the rectification circuit exports
It is the pulse voltage for being T in the period by the pulsating dc voltage that wave is cut, includes zero that the time is t in the pulse voltage each period
Voltage and time are the non-zero voltage of T-t, are provided in the constant-current control circuit and shine electricity for controlling the LED
The lower limit of the control voltage range is denoted as V1 by the control voltage range of road luminous intensity, and the upper limit is denoted as V2；The time electricity
The periodically variable pulse voltage of access according to the ratio of (T-t)/T, is exported the direct current control of corresponding size by voltage conversion circuit
Voltage processed, the constant-current control circuit access direct-current control voltage, when the direct-current control voltage is less than V1,
The constant-current control circuit cut-off, the LED illuminating circuit do not shine, when the direct-current control voltage is more than or equal to V1
And when being less than or equal to V2, the constant-current control circuit conducting, the output DC current control LED illuminating circuit shines,
And the DC current is increased up its maximum value, the LED illuminating circuit with the raising of the direct-current control voltage
Luminous intensity enhance with the increase of the DC current, when the direct-current control voltage be greater than V2 when, the constant current
The DC current of control circuit output keeps maximum value constant, and the luminous intensity of the LED illuminating circuit is maximum.
2. a kind of LED lamp circuit of tunable optical according to claim 1, it is characterised in that the rectification circuit has fire
Line input terminal, zero curve input, output end and ground terminal, the unidirectional through-flow circuit have anode and cathode, the filter
Wave circuit has anode and cathode, and the LED illuminating circuit has anode and cathode, and the constant-current control circuit has defeated
Enter end, output end, control terminal and ground terminal, the time voltage conversion circuit has anode, input, output end and ground connection
End, the input terminal and the unidirectional through-flow circuit of the output end of the rectification circuit, the time voltage conversion circuit
Anode connection, the cathode of the unidirectional through-flow circuit, positive, described constant-current control circuit of the filter circuit
The anode connection of input terminal, the anode of the time voltage conversion circuit and the LED illuminating circuit, the constant current control
The output end of circuit processed is connected with the cathode of the LED illuminating circuit, the output end of the time voltage conversion circuit and
The control terminal of the constant-current control circuit connects, the ground terminal of the rectification circuit, the time voltage conversion circuit
Ground terminal, the filter circuit ground terminal connected with the ground terminal of the constant-current control circuit.
3. a kind of LED lamp circuit of tunable optical according to claim 2, it is characterised in that the time voltage converts electricity
Road includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, first capacitor, the second electricity
Appearance, first diode, the second diode, third diode and the first triode, the first capacitor is electrolytic capacitor, described
The second diode be zener diode, first triode is PNP type triode, the first diode and described
Third diode be rectifier diode, one end of the first resistor is the input of the time voltage conversion circuit
End, the other end of the first resistor, one end of the second resistance, the anode of the first diode and described
The base stage of first triode connects, and one end of the 3rd resistor is the anode of the time voltage conversion circuit, described
The other end of 3rd resistor, described one end of the 4th resistance, the cathode of the first diode and the described the 2nd 2
The cathode of pole pipe connects, the other end of the 4th resistance, one end of the 5th resistance and first triode
Emitter connection, the other end of the 5th resistance, the anode of the first capacitor and the third diode
One end of anode connection, the cathode of the third diode, one end of second capacitor and the 6th resistance connects
It connects and its connecting pin is the output end of the time voltage conversion circuit, the other end of the second resistance, described the
The current collection of one triode, the cathode of the first capacitor, the other end of second capacitor and the 6th resistance
Other end connection and its connecting pin are the ground terminal of time voltage conversion circuit.
4. a kind of LED lamp circuit of tunable optical according to claim 2, it is characterised in that the constant-current control circuit packet
Include the first chip, the 7th resistance, the 8th resistance, the 9th resistance, third capacitor, the 4th diode, the 4th of model MT7816
Capacitor and the first inductance, the 4th diode are fast-recovery commutation diode, and the 4th capacitor is electrolytic capacitor, institute
The anode of the one end for the 7th resistance stated, the cathode of the 4th diode and the 4th capacitor connects and its connecting pin
For the input terminal of the constant-current control circuit, the other end of the 7th resistance, one end of the third capacitor and institute
4th foot of the first chip stated connects, and the 2nd foot of first chip is the control terminal of the constant-current control circuit, institute
3rd foot of the first chip stated is connected with one end of the 8th resistance, the 8th foot of first chip and described
One end of nine resistance connects, the 5th foot of first chip, the 6th foot, the anode of the 4th diode and described the
One end of one inductance connects, and the other end of first inductance is connected with the cathode of the 4th capacitor and its connecting pin is
The output end of the constant-current control circuit, the other end, described of the other end of the third capacitor, the 8th resistance
The other end of the 9th resistance connect with the 1st foot of first chip and its connecting pin is the constant-current control circuit
Ground terminal.
5. a kind of LED lamp circuit of tunable optical according to claim 2, it is characterised in that the unidirectional through-flow circuit packet
Include the 5th diode, the 5th diode is fast-recovery commutation diode, the 5th diode it is just extremely described
Unidirectional through-flow circuit anode, the cathode of the 5th diode is the cathode of the unidirectional through-flow circuit.
6. a kind of LED lamp circuit of tunable optical according to claim 2, it is characterised in that the filter circuit includes the
Five capacitors, the 5th capacitor are electrolytic capacitor, the anode of the just extremely described filter circuit of the 5th capacitor, institute
The cathode for the 5th capacitor stated is the ground terminal of the filter circuit.
7. a kind of LED lamp circuit of tunable optical according to claim 2, it is characterised in that the rectification circuit is using complete
Bridge rectifier bridge stack realizes that the 1st foot of the full bridge rectifier bridge heap is the firewire input terminal of the rectification circuit, and described is complete
3rd foot of bridge rectifier bridge stack is the zero curve input terminal of the rectification circuit, and the 2nd foot of the full bridge rectifier bridge heap is described
Rectified current terminal output end, the 4th foot of the full bridge rectifier bridge heap is the ground terminal of the rectification circuit.
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| CN110312339B CN110312339B (en) | 2021-04-20 |
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| CN114007299A (en) * | 2021-10-27 | 2022-02-01 | 上海先钧光电科技有限公司 | LED dimming circuits, dimmers and lighting fixtures |
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| CN110312339B (en) | 2021-04-20 |
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