CN105592593B - AC direct-drive light control series-parallel LED lamp - Google Patents
AC direct-drive light control series-parallel LED lamp Download PDFInfo
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- CN105592593B CN105592593B CN201610118519.9A CN201610118519A CN105592593B CN 105592593 B CN105592593 B CN 105592593B CN 201610118519 A CN201610118519 A CN 201610118519A CN 105592593 B CN105592593 B CN 105592593B
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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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Abstract
The present invention discloses an AC direct-drive light control series-parallel LED lamp. The working voltage of LEDs is used to balance the no light or burning phenomenon of the LEDs brought by too high and too low input voltage, which means that the series connection and parallel connection automatic switch of the LEDs are used to adjust the instability phenomenon of the input voltage. Specifically, a part of LEDs are used in parallel when grid input voltage is too low, the LEDs are automatically switched to be used as a series line by using a light control line when the grid input voltage is too high, thus the problem of the working of the LED brought by grid voltage is solved perfectly, the function of the automatic adjustment of an input power is achieved, and thus a condition that the input power is not changed with the input voltage is ensured.
Description
Technical field
The present invention relates to LED drive circuit technical field, particularly a kind of exchange directly drive light-operated connection in series-parallel LED.
Background technology
Drive now LED schemes there are constant current power drives and exchange and drive 2 kinds, constant current source drive scheme is that utilization will be defeated
The 220V alternating currents for entering are changed into high frequency voltage through rectification and boost chopper, then through transformer pressure-reducing rectifying and wave-filtering, are changed into low
Pressure DC voltage is powered to LED, the shortcoming circuit complexity of this scheme, wastes substantial amounts of copper material with manually, is electrolysed due to adopting
Electric capacity causes short life, and during low temperature, the electrolyte of electrochemical capacitor can be freezed, and causes power supply not work.Existing directly driven by AC
LED circuit, also has very big problem, is exactly Linear Driving LED, is to cause semiconductor element and LED tight when supply voltage is too high
Heat is retransmitted, and causes whole LED line road power consumption to increase, the serious step-down of energy conversion efficiency causes LED light to decline and increases or even burn
LED。
The content of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, there is provided light-operated string is directly driven in a kind of exchange
Parallel connection LED lamp.
To solve above-mentioned technical problem, the technical solution used in the present invention is：Light-operated connection in series-parallel LED is directly driven in a kind of exchange
Lamp, including the bridge rectifier being sequentially connected in series, and be in series by some LEDs main LED light group, feedback LED light group, the
One LED light group, the second LED light group, the 3rd LED light group, the 4th LED light group and current stabilization control circuit, in the feedback LED light group
It is respectively arranged between the second LED light group, between the 3rd LED light group and current stabilization control circuit and controls the first of its break-make
On-off circuit, the 4th on-off circuit；It is provided between first LED light group and the 4th LED light group and controls the of its break-make
Two on-off circuits, the 3rd on-off circuit；The first switch circuit, second switch circuit, the 3rd on-off circuit, the 4th switch electricity
The conducting control end on road is respectively by the feedback LED light group, the first LED light group, the second LED light group, the feedback control of the 3rd LED light group
Voltage processed；The first switch circuit, the disconnection control end of second switch circuit are controlled by the first light-operated circuit, and the described 3rd opens
Powered-down road, the disconnection control end of the 4th on-off circuit are controlled by the second light-operated circuit, first light-operated circuit, the second light-operated electricity
The power taking between the feedback LED light group and the first LED light group of the control voltage on road.
In above-mentioned technical proposal, first LED light group, the second LED light group, the 3rd LED light group all include the feedback
LED light group, and the feedback LED light group is the second switch circuit, the 3rd on-off circuit, the conducting control of the 4th on-off circuit
End processed provides control voltage.
In above-mentioned technical proposal, the first switch circuit, second switch circuit, the 3rd on-off circuit, the 4th switch electricity
Road be respectively field effect transistor Q1, Q2, Q3, Q4, between field effect transistor Q1, Q2, the source electrode of Q3, Q4 and grid respectively with it is described
Feedback LED light group is in parallel, and Zener diode ZD1, the field effect are connected between the drain electrode of field effect transistor Q1, Q2 and grid
Should pipe Q3, Q4 drain electrode and grid between be connected with Zener diode ZD2.
In above-mentioned technical proposal, first light-operated circuit includes power taking branch road, comparator IC1, the first photoelectrical coupler
The voltage of U1 and the second photoelectrical coupler U2, comparator IC1 according to power taking branch road, the first photoelectrical coupler U1 of control and the second light
The break-make of electric coupler U2, the first photoelectrical coupler U1 control the control electricity of the disconnection control end of the first switch circuit
Pressure, the second photoelectrical coupler U2 control the control voltage of the disconnection control end of the second switch circuit.
In above-mentioned technical proposal, second light-operated circuit includes power taking branch road, comparator IC2, the 3rd photoelectrical coupler
The voltage of U3 and the 4th photoelectrical coupler U4, comparator IC2 according to power taking branch road, the 3rd photoelectrical coupler U3 of control and the 4th light
The break-make of electric coupler U4, the 3rd photoelectrical coupler U3 control the control electricity of the disconnection control end of the 3rd on-off circuit
Pressure, the 4th photoelectrical coupler U4 control the control voltage of the disconnection control end of the 4th on-off circuit.
In above-mentioned technical proposal, the current stabilization control circuit includes feedback resistance, the first partial pressure branch road, the second partial pressure branch road
With the 3rd partial pressure branch road, the second partial pressure branch road and the 3rd partial pressure branch road are disposed with the second partial pressure branch road of control respectively and lead to
Second partial pressure switch of the 3rd partial pressure branch road break-make of the first disconnected partial pressure switch and control, the control end of the first partial pressure switch by
First partial pressure branch road provides control voltage, and the control end of the second partial pressure switch provides control electricity by the outfan of the first partial pressure switch
Pressure.
In above-mentioned technical proposal, first partial pressure switch includes audion Q7, the voltage between its base stage and emitter stage
The feedback resistance is taken from, its collector voltage is output in the control end of second partial pressure switch.
In above-mentioned technical proposal, second partial pressure switch includes field effect transistor Q5, Q6.
In above-mentioned technical proposal, the main LED light group includes 16 LEDs；Feedback LED light group includes 2 LEDs；The
One LED light group, the second LED light group, the 3rd LED light group, the 4th LED light group include 3 LEDs respectively.
In above-mentioned technical proposal, electric fuse F1 between the bridge rectifier and power supply, is provided with.
The invention has the beneficial effects as follows：Using the running voltage of LED itself it is too high and too low come balanced input voltages when band
Not work or burn LED phenomenons, that is, the series connection using LED and the shakiness automatically switched to automatically adjust input voltage in parallel
Determine phenomenon；Particularly as being that LED has part for used in parallel when electrical network input voltage is too low, when line voltage is too high LED from
Dynamic to switch to series circuit to use, thus perfection solves the problems, such as that line voltage is brought to LED operation, and input power is automatic
With this, the function of regulation, ensures that input power does not change with input voltage.
Description of the drawings
Fig. 1 is the theory structure schematic diagram of the present invention；
Fig. 2 is the electrical block diagram of the present invention.
Specific embodiment
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
As shown in figure 1, light-operated connection in series-parallel LED is directly driven in a kind of exchange, including the bridge rectifier being sequentially connected in series, Yi Jiyou
Main LED light group that some LEDs are in series, feedback LED light group, the first LED light group, the second LED light group, the 3rd LED light group,
4th LED light group and current stabilization control circuit, between the feedback LED light group and the second LED light group, the 3rd LED light group
First switch circuit, the 4th on-off circuit for controlling its break-make is respectively arranged between current stabilization control circuit；Described first
Second switch circuit, the 3rd on-off circuit for controlling its break-make is provided between LED light group and the 4th LED light group；Described first
On-off circuit, second switch circuit, the 3rd on-off circuit, the conducting control end of the 4th on-off circuit are respectively by feedback LED
Lamp group, the first LED light group, the second LED light group, the 3rd LED light group feedback control voltage；The first switch circuit, second open
The disconnection control end on powered-down road is controlled by the first light-operated circuit, the 3rd on-off circuit, the disconnection control of the 4th on-off circuit
End is controlled by the second light-operated circuit, and first light-operated circuit, the control voltage of the second light-operated circuit are in the feedback LED light group
The power taking between the first LED light group.
Wherein, first LED light group, the second LED light group, the 3rd LED light group all include the feedback LED light group, and
And the feedback LED light group provides control for the conducting control end of the second switch circuit, the 3rd on-off circuit, the 4th on-off circuit
Voltage processed.
Wherein, the first switch circuit, second switch circuit, the 3rd on-off circuit, the 4th on-off circuit are respectively field
Effect pipe Q1, Q2, Q3, Q4, between field effect transistor Q1, Q2, the source electrode of Q3, Q4 and grid respectively with the feedback LED
Group is in parallel, and Zener diode ZD1, field effect transistor Q3, Q4 are connected between the drain electrode of field effect transistor Q1, Q2 and grid
Drain electrode and grid between be connected with Zener diode ZD2.
Wherein, first light-operated circuit includes power taking branch road, comparator IC1, the first photoelectrical coupler U1 and the second light
The voltage of electric coupler U2, comparator IC1 according to power taking branch road, controls the first photoelectrical coupler U1 and the second photoelectrical coupler U2
Break-make, the first photoelectrical coupler U1 controls the control voltage of the disconnection control end of the first switch circuit, described the
Two photoelectrical coupler U2 control the control voltage of the disconnection control end of the second switch circuit.Power taking branch road is gone here and there for R7, R8, R9
The branch road of connection.
Wherein, second light-operated circuit includes power taking branch road, comparator IC2, the 3rd photoelectrical coupler U3 and the 4th light
The voltage of electric coupler U4, comparator IC2 according to power taking branch road, controls the 3rd photoelectrical coupler U3 and the 4th photoelectrical coupler U4
Break-make, the 3rd photoelectrical coupler U3 controls the control voltage of the disconnection control end of the 3rd on-off circuit, described the
Four photoelectrical coupler U4 control the control voltage of the disconnection control end of the 4th on-off circuit.Power taking branch road be R14, R15,
The branch road of R16 series connection.
Wherein, the current stabilization control circuit includes feedback resistance, the first partial pressure branch road, the second partial pressure branch road and the 3rd partial pressure
Branch road, the second partial pressure branch road and the 3rd partial pressure branch road are disposed with first point of the second partial pressure branch road break-make of control respectively
The second partial pressure switch of the 3rd partial pressure branch road break-make is compressed switch and controls, the control end of the first partial pressure switch is by the first partial pressure
Road provides control voltage, and the control end of the second partial pressure switch provides control voltage by the outfan of the first partial pressure switch.
Wherein, first partial pressure switch includes audion Q7, and the voltage between its base stage and emitter stage is taken from described
Feedback resistance, its collector voltage are output in the control end of second partial pressure switch.
Wherein, second partial pressure switch includes field effect transistor Q5, Q6.
Wherein, the main LED light group includes 16 LEDs（LED1-LED16）；Feedback LED light group includes 2 LEDs
（LED17-LED18）；First LED light group (LED19-LED21), the second LED light group (LED22-LED24), the 3rd LED light group
(LED25-LED27), the 4th LED light group (LED28-LED30) includes 3 LEDs respectively.
Wherein, electric fuse F1 is provided between the bridge rectifier and power supply.
As shown in Fig. 2 light-operated connection in series-parallel LED is directly driven in a kind of exchange, its element connection is as follows：
Capable AC L ends are connected to the 2nd foot of bridge rectifier D B1 into after electric fuse F1, and capable AC N-terminal directly connects
The 3rd foot of bridge rectifier D B1 is connected to, the 1st foot of bridge rectifier D B1 is connected with LED1 and Rh1, Rh1 and Rh2 and Rh3 goes here and there
Connection, the 2nd foot of Rh3 are connected with R19, R22 and Rj1, and the 1st foot of R19 is connected with R20 and R21, the 1st foot ground connection of R20, field
2nd foot of effect pipe Q6 is connected with R22 and field effect transistor Q6, and the 3rd foot of field effect transistor Q6 is connected with R23, and the 1st foot of R23 connects
Ground, the 3rd foot of field effect transistor Q6 are connected with Rn1, and the 1st foot ground connection of Rn1, the 2nd foot of field effect transistor Q6 are connected with Q5, field effect
1st foot of pipe Q5 is connected with Rj1 and Rj2, the 2nd foot and Rj2, U4, ZD4, field effect transistor Q4 and the LED30 phases of field effect transistor Q5
Even.
LED1、LED2、LED3、LED4、LED5、LED6、LED7、LED8、LED9、LED10、LED11、LED12、LED13、
LED14, LED15 and LED16 are connected in order, and LED16 is connected with LED17 and R1, and LED17 is connected with LED18, LED18 with
LED19, field effect transistor Q1, R5, R7, R12 and R14 are connected, the 1st foot of R1 and field effect transistor Q1, Zener diode ZD1 with
And U1 is connected, R5 is connected with R6, and the 1st foot of R6 is connected with Zener diode ZD5, R11 and U1, the of Zener diode ZD5
2 feet are grounded, and the 2nd foot of U1 is connected with U2, and R7 is connected with R8, and the 1st foot of R8 is connected with R9, C1 and comparator IC1, and the of R9
1 foot is grounded, and the 2nd foot ground connection of comparator IC1, C1 are connected with R10, and the 1st foot of R10 is connected with comparator IC1, R11 and U2,
3rd foot of field effect transistor Q1 is connected with Zener diode ZD1, U1, diode D1 and LED22, the negative pole and LED20 of LED19
Be connected with R2, LED20 is connected with LED21, the negative pole of LED21 is connected with D1 and field effect transistor Q2, the 1st foot of field effect transistor Q2 with
R2, Zener diode ZD2 and U2 are connected, the 3rd foot of field effect transistor Q2 and Zener diode ZD2, LED24, LED25, U2 with
And field effect transistor Q3 is connected, the negative pole of LED22 is connected with LED23 and R3, and LED23 is connected with LED24, and the 1st foot and the field of R3 are imitated
Should pipe Q3, Zener diode ZD3 and U3 be connected, the 3rd foot of field effect transistor Q3 and Zener diode ZD3, diode D2,
LED28 and U3 is connected, and the negative pole of LED25 is connected with LED26 and R4, and LED26 is connected with LED27, the negative pole and D2 of LED27
Be connected with field effect transistor Q4, the 1st foot of field effect transistor Q4 is connected with R4, Zener diode ZD4 and U4, LED28, LED29 and
LED30 is connected in order, and R12 is connected with R13, and the 2nd foot of R13 is connected with Zener diode ZD6, R18 and U3, two pole of voltage stabilizing
The 2nd foot ground connection of pipe ZD6, the 2nd foot of U3 are connected with U4, and R14 is connected with R15, the 1st foot and C2, R16 and the comparator of R15
IC2 is connected, and C2 is connected with R17, and the 1st foot of R17 is connected with comparator IC2, R18 and U4, the 2nd foot ground connection of comparator IC2.
The operation principle of the present invention：Electric network source 220V alternating voltages are powered to bridge rectifier by electric fuse F1, bridge
Grid ac voltage is converted to DC voltage by formula commutator DB1A, that is to say, that 50HZ alternating currents are changed into by bridge rectifier
The only positive half-wave voltage of 100HZ is powered to LED, and it is 220*1.414=311V that this is the peak value of positive half-wave voltage, and a total of 30
LEDs（LED1-LED30）, it is 9V per LEDs running voltage, when all LED are to be used in series, 30 are multiplied by 9 equal to 270V,
Namely 30 LEDs can be with the DC voltage of resistance to 270V.Because bridge rectifier out be half-wave DC voltage, each half-wave week
Phase is 25ms, and voltage climbs crest voltage from 0 in this 25ms, then drops to 0 from crest voltage, is a just profound ripple, 30 LEDs
There are 18 LED（LED1-LED18）It is uncontrolled, there are 12 LEDs（LED19-LED30）Divide 2 groups of composition connection in series-parallel LED, per group
Connection in series-parallel LED controls 6 LEDs, that is to say, that every group of connection in series-parallel LED can constitute 3 strings 2 simultaneously, can constitute 6 strings again, according to electricity
The height automatic switchover connection in series-parallel of pressure.
Half-wave voltage from 0 start to climb when, when voltage climbs more than 216V, that is, more than 24 LED work electricity
Press as 24*9V=216V, LED starts working luminous, and at this moment field effect transistor Q1 and Q2 and Q3 and Q4 are in the conduction state, because Q1
Front 2 grades of LED are taken from the grid voltage of Q2 and Q3 and Q4, each LED operation voltage is 9V, at this moment Q1 and Q2 and Q3 and Q4 grids
Voltage is 18V or so, so Q1 and Q2 and Q3 and Q4 are simultaneously turned on, while will be 2 groups of controlled LED strip parallel circuit compositions in parallel
Circuit；Namely LED19 and LED20 and LED21 and LED22 and LED23 and LED24 is changed into 3 strings 2 simultaneously, and running voltage is equivalent to 3
LEDs；In the same manner LED25 and LED26 and LED27 and LED28 and LED29 and LED30 be also 3 strings 2 simultaneously, running voltage is equivalent to 3
LEDs；Wherein diode D1 and D2 play connection in series-parallel guiding or iris action, and whole LED is equivalent to 24 string-like states（Equivalent to 24
LEDs running voltage）.
When half-wave voltage climbs 254V, at this time+VCB voltages are 254-162V（18 LEDs * 9V）=92V, now
IC1（TL431 precision comparators, comparison voltage are 2.5V）1 foot voltage of input be R9*91/ (R9+R7+R8)=6.2K*92/
(6.2K+110K+110K), more than 2.5V, IC1 begins to turn on, and 3 feet of IC1 are to 1 foot equivalent to short circuit so that photoelectrical coupler
The lumination of light emitting diode of the input circuit of BL817B (U1 and U2) so that photoelectrical coupler output light fulgurite is turned on, because light
Fulgurite only has 0.1V or so pressure drops when turning on, while equivalent to short circuit between field effect transistor Q1 and Q2 grids and drain electrode, by Q1 and Q2
End simultaneously, equivalent to open circuit, at this moment LED19 and LED20 and LED21 and LED22 and LED23 and LED24 is by 3 strings 2 for Q1 and Q2
And circuit is changed into 6 series circuits, the LED in whole loop is equivalent to 27 strings.
When voltage continues to climb more than 282V, the 1 foot input voltage of IC2 compares more than inside accurate voltage comparator TL431
Compared with voltage 2.5V, because the 1 foot voltage of IC2 now is：R16*282V/(R16+R14+R15)=4.7K*282V/(4.7K+
110K+110K) more than 2.5V, so IC2 is turned on, the input LEDs ON of photoelectrical coupler U3 and U4 lights so that
The conducting of corresponding photocell, now the grid of field effect transistor Q3 and Q4 between drain electrode equivalent to short circuit so that Q3 and Q4 ends,
LED25 and LED26 and LED27 and LED28 and LED29 and LED30 is from 3 strings 2 and is changed into 6 strings, and whole LED loops are changed into 30 strings.
When voltage continues to climb, the LED in whole loop maintains 30 to connect, when voltage climbs under summit voltage 311V starts
Drop.
In the same manner, when voltage descends below 282V, due to IC2 1 foot of input be less than 2.5V when, IC2 be changed into cut-off, Q3 and
Q4 is changed into conducting, and LED25 and LED26 and LED27 and LED28 and LED29 and LED30 is changed into 3 strings 2 simultaneously from 6 strings, and whole loop is returned
To 27 LEDs series connection.
When voltage continues to descend below 254V, the 1 foot voltage of IC1 is less than 2.5V, in the same manner LED19 and LED20 and LED21
It is changed into 3 strings 2 simultaneously from 6 strings with LED22 and LED23 and LED24.
When voltage drops to 0, second period and later each half wave cycle voltage continue to go round and begin again and recur first
The situation of half-wave voltage.
This circuit is cleverly reached in different voltages using the running voltage of LED itself come automatically using LED strip parallel connection
Adapt to.As line voltage is not constant in 220V alternating currents, when line voltage is higher than 220V alternating voltages, this circuit is utilized
The LED current that Q5 and Q6 is brought to resist voltage to raise becomes big, and principle is：When voltage climbs more than 270V, that is, 30
During LED operation voltage, field effect transistor Q1 and Q2 begin to change into high-impedance state by conducting state, and concrete operating principle is when voltage is low
When, by adjusting resistance Rh1 and Rh2 and Rh3 and R19 and R20 partial pressures, audion Q7 cut-offs, Q7 colelctor electrode output HIGH voltages make
Field effect transistor Q5 and Q6 conductings are obtained, when voltage climbs more than 270V, Q7 initially enters magnifying state, is gradually turned on, Q7 current collections
Pole tension declines so that field effect transistor Q5 and Q6 grid voltage step-downs so that field effect transistor electric conduction resistive is big, field effect transistor leakage
Between source, voltage becomes big so that LED strip connection voltage diminishes so that the electric current of loop LED diminishes, so as to protect the LED will not be because of electricity
Pressure increases burns, and wherein resistance Rn1 is Current Negative Three-Point Capacitance resistance, becomes big when the ohmically electric currents of Rn1 are flow through, Rn1 both end voltages
Uprise so that between the BE of Q7 voltage increase, Q7 is further turned on, Q7 collector voltage step-downs so that field effect transistor Q5 and
Q6 grid voltage step-downs, so as to improve field effect transistor conducting resistance, are that voltage is uprised between field effect transistor drain-source so that LED is returned
Road electric current diminishes, and plays constant LED current effect.Protection LED circuit electric current is not too large, plays protection LED effects.
Embodiment above is merely illustrative and not limiting to the invention, therefore all according to described in present patent application scope
The equivalence changes done of method or modification, be included in the range of present patent application.
Claims (9)
1. light-operated connection in series-parallel LED is directly driven in a kind of exchange, it is characterised in that：Including the bridge rectifier being sequentially connected in series, Yi Jiyou
Main LED light group that some LEDs are in series, feedback LED light group, the first LED light group, the second LED light group, the 3rd LED light group,
4th LED light group and current stabilization control circuit, between the feedback LED light group and the second LED light group, the 3rd LED light group
First switch circuit, the 4th on-off circuit for controlling its break-make is respectively arranged between current stabilization control circuit；Described first
Second switch circuit, the 3rd on-off circuit for controlling its break-make is provided between LED light group and the 4th LED light group；Described first
On-off circuit, second switch circuit, the 3rd on-off circuit, the conducting control end of the 4th on-off circuit are respectively by feedback LED
Lamp group, the first LED light group, the second LED light group, the 3rd LED light group feedback control voltage；The first switch circuit, second open
The disconnection control end on powered-down road is controlled by the first light-operated circuit, the 3rd on-off circuit, the disconnection control of the 4th on-off circuit
End is controlled by the second light-operated circuit, and first light-operated circuit, the control voltage of the second light-operated circuit are in the feedback LED light group
The power taking between the first LED light group；First LED light group, the second LED light group, the 3rd LED light group all respectively comprising one with
The feedback LED light group identical feedback LED light group, and the feedback LED light group be respectively the second switch circuit, the 3rd
On-off circuit, the conducting control end of the 4th on-off circuit provide control voltage.
2. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：The first switch
Circuit, second switch circuit, the 3rd on-off circuit, the 4th on-off circuit are respectively field effect transistor（Q1、Q2、Q3、Q4）, the field
Effect pipe（Q1、Q2、Q3、Q4）Source electrode and grid between it is anti-with what feedback LED light group, first LED light group were included respectively
The feedback LED light group that the feedback LED light group and the 3rd LED light group that feedback LED light group, the second LED light group are included is included is in parallel, described
Field effect transistor（Q1、Q2）Drain electrode and grid between be connected with Zener diode（ZD1）, the field effect transistor（Q3、Q4）Leakage
Zener diode is connected between pole and grid（ZD2）.
3. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：Described first is light-operated
Circuit includes power taking branch road, comparator（IC1）, the first photoelectrical coupler（U1）With the second photoelectrical coupler（U2）, comparator
（IC1）According to the voltage of power taking branch road, the first photoelectrical coupler is controlled（U1）With the second photoelectrical coupler（U2）Break-make, it is described
First photoelectrical coupler（U1）Control the control voltage of the disconnection control end of the first switch circuit, second photoelectric coupling
Device（U2）Control the control voltage of the disconnection control end of the second switch circuit.
4. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：Described second is light-operated
Circuit includes power taking branch road, comparator（IC2）, the 3rd photoelectrical coupler（U3）With the 4th photoelectrical coupler（U4）, comparator
（IC2）According to the voltage of power taking branch road, the 3rd photoelectrical coupler is controlled（U3）With the 4th photoelectrical coupler（U4）Break-make, it is described
3rd photoelectrical coupler（U3）Control the control voltage of the disconnection control end of the 3rd on-off circuit, the 4th photoelectric coupling
Device（U4）Control the control voltage of the disconnection control end of the 4th on-off circuit.
5. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：The current stabilization control
Circuit includes feedback resistance, the first partial pressure branch road, the second partial pressure branch road and the 3rd partial pressure branch road, the second partial pressure branch road and
Three partial pressure branch roads are disposed with the first partial pressure switch of the second partial pressure branch road break-make of control and control the 3rd partial pressure respectively
Second partial pressure switch of road break-make, the control end of the first partial pressure switch provide control voltage, the second partial pressure by the first partial pressure branch road
The control end of switch provides control voltage by the outfan of the first partial pressure switch.
6. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 5, it is characterised in that：First partial pressure
Switch includes audion（Q7）, the voltage between its base stage and emitter stage is taken from the feedback resistance, and its collector voltage is defeated
For the control end of second partial pressure switch.
7. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 5 or 6, it is characterised in that：Described second point
Compress switch including field effect transistor（Q5、Q6）.
8. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：The main LED light group
Including 16 LEDs；Feedback LED light group includes 2 LEDs；First LED light group, the second LED light group, the 3rd LED light group,
Four LED light groups include 3 LEDs respectively.
9. light-operated connection in series-parallel LED is directly driven in a kind of exchange according to claim 1, it is characterised in that：The bridge rectifier
Electric fuse is provided between device and power supply（F1）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610118519.9A CN105592593B (en) | 2016-03-03 | 2016-03-03 | AC direct-drive light control series-parallel LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610118519.9A CN105592593B (en) | 2016-03-03 | 2016-03-03 | AC direct-drive light control series-parallel LED lamp |
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| CN105592593A CN105592593A (en) | 2016-05-18 |
| CN105592593B true CN105592593B (en) | 2017-05-03 |
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