CN206686409U - A kind of LED filament lamp light adjusting circuit - Google Patents
A kind of LED filament lamp light adjusting circuit Download PDFInfo
- Publication number
- CN206686409U CN206686409U CN201720408366.1U CN201720408366U CN206686409U CN 206686409 U CN206686409 U CN 206686409U CN 201720408366 U CN201720408366 U CN 201720408366U CN 206686409 U CN206686409 U CN 206686409U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- circuits
- toff
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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]
Abstract
The utility model discloses a kind of LED filament lamp light adjusting circuit, including：Comparator cmp1, Tonmax circuit, Toff control circuits, control drive circuit, linear constant current circuit, rectifier bridge, pi types filter circuit, inductance Lm, sustained diode out, output capacitance Cout and load LED.The circuit be mainly used in the fields such as AC D/C powers, LED drivings and other based on preceding cut or after cut the system of dimmer operation and realize regulatory function of the light modulator to output voltage or electric current, initial power Pmax during light modulator maximum conduction angle can reliably be improved, output current ripple is reduced in whole dimming process, improves the compatibility of system；It can apply to boost boost frameworks, buck buckBoost frameworks and decompression buck frameworks.
Description
Technical field
The utility model discloses a kind of LED filament lamp light adjusting circuit, is mainly used in the fields such as AC-DC power supplys, LED drivings
And other based on preceding cut or after cut the system of dimmer operation and realize regulatory function of the light modulator to output voltage or electric current, energy
Initial power Pmax during enough reliable raising light modulator maximum conduction angles, reduces output current line in whole dimming process
Ripple, improve the compatibility of system.The utility model can apply to boost boost frameworks, buck buckBoost frameworks and drop
Press buck frameworks.
Background technology
Filament lamp has the advantages that can realizing that 360 ° of full angles light, light efficiency is high, and integrated level is high.Due to higher
Output voltage, the drive circuit of filament lamp are often realized using linear constant current scheme.
Fig. 1 is a kind of circuit diagram of traditional LED filament lamp light adjusting circuit.
LED filament lamp light adjusting circuit occurs that initial power Pmax during light modulator maximum conduction angle is too low, is entirely adjusting
Output current ripple is very big in photoreduction process and light modulator flashing lamp problem, it is impossible to the application of compatible dimming arrangement well.
As shown in Fig. 2 due to using linear constant current control structure, only input power-frequency voltage Vin and be more than output voltage
During Vout, output current can be normally produced.And the initial turn-on angular difference of various light modulators is not huge on the market.For initial
The small light modulator of the angle of flow, initial power Pmax during light modulator maximum conduction angle can be more much lower than not connecing the situation of light modulator.
Meanwhile output current ripple is very big in whole dimming process, system stroboscopic is serious, there is human eye compared with major injury.In the opposing party
Face, when light modulator regulation is close with output voltage Vout to input power-frequency voltage Vin ceiling voltage, dimmer conduction angle
Minor variations can cause the notable difference of output current, cause light modulator to flash.
Utility model content
Problem to be solved in the utility model is to provide a kind of LED filament lamp light adjusting circuit, being capable of compatible various light modulations
Device application, higher initial power Pmax is realized, relatively low output current ripple is realized in whole dimming process and avoids adjusting
Light device flashing lamp problem.
Utility model provides a kind of LED filament lamp light adjusting circuit, including：Comparator cmp1, Tonmax circuit, Toff controls
Circuit, control drive circuit, linear constant current circuit, rectifier bridge, pi types filter circuit, inductance Lm, sustained diode out, output
Electric capacity Cout and load LED；Rectifier bridge is connected with pi type filter circuits；Inductance Lm one end is connected with pi type filter circuits, separately
One end is connected with sustained diode out positive pole；Load LED positive pole be connected with sustained diode out negative pole, negative pole and
Linear constant current circuit connects；Control drive circuit has driving power pipe Msw；Driving power pipe Msw drain terminal, which continues, flows two poles
Pipe Dout anode；Comparator cmp1 anode is connected with driving power pipe Msw source, negative pole and the 3rd fixed voltage
Vref3 connections, output end is with controlling the input of drive circuit to be connected；The output end of Tonmax circuits and control drive circuit
Input connects；Toff control circuits are with controlling the input of drive circuit to be connected；Output capacitance Cout one end and load LED
Positive pole connection, the other end is connected with linear constant current circuit.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Toff control circuits
Including controlling electric capacity Ccomp；Linear constant current circuit includes：First amplifier amp1, linear low density pipe Mdrain, the second clamp circuit
With output electric current measure resistance Rio；First amplifier amp1 positive termination control electric capacity Ccomp；First amplifier amp1 negative terminal point
Other wiring high-voltage tube Mdrain source, the input of the second clamp circuit, output electric current measure resistance Rio one end；First
The output of amplifier amp1 output end wiring high-voltage tube Mdrain grid end, the second clamp circuit；Load LED negative pole connects height
Pressure pipe Mdrain drain terminal.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Toff control circuits
Also include：Second amplifier amp2, current source Iup, current source Idn, switch Mup, switch Mdn, the first clamp circuit and Toff electricity
Road；Second amplifier amp2 anode difference wiring high-voltage tube Mdrain grid end, the output of the second clamp circuit, the first amplifier
Amp1 output end；Second amplifier amp2 negative terminal meets the second fixed voltage Vref2；Second amplifier amp2 output termination switch
Mup and switch Mdn grid；Switch Mup source class meets current source Iup；Switch Mdn source class meets current source Idn；Switch Mup
Drain meet switch Mdn drain, an input of Toff circuits, control electric capacity Ccomp respectively；First clamp circuit it is defeated
Go out to connect another input of Toff circuits；The output end of Toff circuits is with controlling the input of drive circuit to be connected.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Toff control circuits
Including Toff circuits；Control drive circuit also includes, the first nor gate NOR1, the second nor gate NOR2, drive circuit and peak value
Current sense resistor Rcs；The second nor gate NOR2 of output termination of a Toff circuits input；Comparator cmp1 output
Terminate a first nor gate NOR1 input；First nor gate NOR1 output terminates another of the second nor gate NOR2
The input of input and drive circuit；Second nor gate NOR2 the first nor gate NOR1 of output termination another input
End；The output of first nor gate NOR1 the 3rd input termination Tonmax circuit；A peak current detection resistance Rcs termination
Driving power pipe Msw source electrode；The output termination driving power pipe Msw of drive circuit grid.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Pi type filter circuits
Including：Filter inductance Lpi, the first electric capacity Cpi1 and the second electric capacity Cpi2；Filter inductance Lpi one end connects the defeated of rectifier bridge respectively
Go out, the first electric capacity Cpi1 one end；The other end connects inductance Lm one end, the second electric capacity Cpi2 one end respectively.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Toff control electricity
Road, control drive circuit, linear constant current circuit, pi types filter circuit and output capacitance Cout ground connection.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：Toff control circuits
Control electric capacity Ccomp and current source Idn one end ground connection；Control peak current detection resistance Rcs one end ground connection of drive circuit；
Output electric current measure resistance Rio one end ground connection of linear constant current circuit；The electricity of first electric capacity Cpi1 of pi type filter circuits and second
Hold Cpi2 one end to be all grounded.
The utility model provides a kind of LED filament lamp light adjusting circuit, can also have the feature that：LED filament lamp is adjusted
Optical circuit can apply to boost boost frameworks, buck buckBoost frameworks and decompression buck frameworks.
A kind of LED filament lamp light adjusting circuit provided by the utility model, as a result of switch constant pressure+linear Ripple Suppression
Framework, initial power Pmax during light modulator maximum conduction angle can be reliably improved, avoid light modulator flashing lamp problem, improved
Compatibility of the system to different dimmer applications；, can be in whole dimming process due to adding linear ripple suppression circuit
Relatively low output current ripple is realized, protects the eyes of user.The utility model can apply to boost boost frameworks, liter
It is depressured buckBoost frameworks and decompression buck frameworks.
Brief description of the drawings
Fig. 1 is the circuit diagram of traditional LED filament lamp light adjusting circuit.
Fig. 2 is traditional LED filament lamp light adjusting circuit dimmer application scheme works waveform.
Fig. 3 is the block diagram of the LED filament lamp light adjusting circuit in the utility model.
Fig. 4 is the LED filament lamp light adjusting circuit dimmer application scheme works waveform in the utility model.
Embodiment：
Below in conjunction with accompanying drawing, the utility model is described further.
Fig. 3 is the block diagram of LED filament lamp light adjusting circuit.
As shown in figure 3, a kind of LED filament lamp light adjusting circuit, including：Comparator cmp1, Tonmax circuit, Toff control electricity
Road, control drive circuit, linear constant current circuit, rectifier bridge, pi types filter circuit, inductance Lm, sustained diode out, output electricity
Hold Cout and load LED.
Toff control circuits include：Second amplifier amp2, current source Iup, current source Idn, switch Mup, switch Mdn, control
Electric capacity Ccomp, the first clamp circuit and Toff circuits processed.
Control drive circuit includes：First nor gate NOR1, the second nor gate NOR2, drive circuit, driving power pipe Msw
With peak current detection resistance Rcs.
Linear constant current circuit includes：First amplifier amp1, linear low density pipe Mdrain, the second clamp circuit and output current
Detection resistance Rio.
Pi type filter circuits include：Filter inductance Lpi, the first electric capacity Cpi1 and the second electric capacity Cpi2.
Rectifier bridge is connected with pi type filter circuits.The output of a filter inductance Lpi termination rectifier bridge and the first electric capacity
Cpi1 one end；The filter inductance Lpi another termination inductance Lm other end and the second electric capacity Cpi2 one end.First electric capacity
Cpi1, the second electric capacity Cpi2 other end ground connection.
Inductance Lm one end is connected with the filter inductance Lpi of pi type filter circuits, and the other end is with sustained diode out's
Positive pole connects.Load LED positive pole is connected with sustained diode out negative pole, the driving power of negative pole and linear constant current circuit
Pipe Msw drain terminal connection.Output capacitance Cout one end is connected with sustained diode out negative pole, the other end and linear constant current
Circuit connects, and is grounded.
In Toff control circuits, the second amplifier amp2 anode difference wiring high-voltage tube Mdrain grid end, the second pincers
The output of position circuit, the first amplifier amp1 output end.Second amplifier amp2 negative terminal meets the second fixed voltage Vref2.Second
Amplifier amp2 output termination switch Mup and the grid for switching Mdn.
Switch Mup source class meets current source Iup；Switch Mdn source class meets current source Idn；Switch Mup drain connects switch
Mdn drain, an input of Toff circuits, control electric capacity Ccomp one end.The output of first clamp circuit connects Toff electricity
Another input on road.The second nor gate NOR2 of output termination of a Toff circuits input.Current source Idn is grounded.
Control electric capacity Ccomp other end ground connection.The second nor gate NOR2 of output termination of a Toff circuits input.
Comparator cmp1 anode is connected with driving power pipe Msw source, and negative pole and the 3rd fixed voltage Vref3 connect
Connect, with controlling the input of drive circuit be connected, output end is connected output end with the input of control drive circuit, i.e., with first
Nor gate NOR1 input connection.
The output end of Tonmax circuits is with controlling the input of drive circuit to be connected, i.e., another with the first nor gate NOR1
Individual input connection.
Comparator cmp1 the first nor gate NOR1 of an output termination input；First nor gate NOR1 output end
The second nor gate NOR2 another input, the input of drive circuit is connect respectively.Second nor gate NOR2 output termination
First nor gate NOR1 another input.The output of first nor gate NOR1 the 3rd input termination Tonmax circuit.
The output termination driving power pipe Msw of drive circuit grid end；Driving power pipe Msw drain terminal connects the one of inductance Lm
The anode of termination and sustained diode out.Peak current detection resistance Rcs one end connects with driving power pipe Msw source
Connect, other end ground connection.
In linear constant current circuit, the first amplifier amp1 positive termination control electric capacity Ccomp；First amplifier amp1 negative terminal connects
Linear low density pipe Mdrain source, the input of the second clamp circuit and output electric current measure resistance Rio；First amplifier amp1's
The anode of output end wiring high-voltage tube Mdrain grid end, the output of the second clamp circuit and the second amplifier amp2.Output electricity
Stream detection resistance Rio one end is connected with linear low density pipe Mdrain source, other end ground connection.
Driving power pipe Msw, linear low density pipe Mdrain and switch M1 can use PMOS, NMOS tube, PNP pipe or NPN
Pipe.
A kind of LED filament lamp light adjusting circuit provided by the utility model, employ switch constant pressure+linear Ripple Suppression frame
Structure, prime is using switch constant pressure so that input power-frequency voltage Vin remains to export to rear class when being less than output voltage Vout provides energy
Amount, so as to improve initial power Pmax；Avoid simultaneously light modulator regulation to input power-frequency voltage Vin ceiling voltage with
The problem of output voltage Vout causes light modulator to flash when close.
Due to adding ripple suppression circuit, the voltage ripple in input capacitance is fully loaded to linear low density pipe Mdrain
Both ends, ensure that LED load both end voltage is stable, so as to reduce output current ripple, protect the eyes of user.The utility model
It can apply to boost boost frameworks, buck buckBoost frameworks and decompression buck frameworks.
LED filament lamp light adjusting circuit switch constant pressure concrete operating principle be：
As shown in figure 3, when driving power pipe Msw is turned on, inductance Lm electric current gradually rises, peak current detection resistance
Inductance Lm electric current is converted into Rcs into voltage signal and fixed voltage Vref3 compares, when peak current detection resistance Rcs electricity
ON time of the pressure more than fixed voltage Vref3 or driving power pipe Msw is more than the calculating time Tonmax of Tonmax circuits
Then turn off driving power pipe Msw.
The calculating time Tonmax of Tonmax circuits is generally located between 1us to 100us.
After driving power pipe Msw is turned off, by delay time Toff, driving power pipe Msw is turned on again.Delay time
Toff determines that voltage Vcomp is higher by electric capacity Ccomp voltage Vcomp, and the Toff times are longer.
Linear low density pipe Mdrain grid voltage Vgate and fixed voltage Vref2 are compared, if load LED's is negative
Terminal voltage Vdrain is higher, then linear low density pipe Mdrain grid voltage Vgate is relatively low, less than fixed voltage Vref2, amplifier
Amp2 outputs are low, switch Mup conductings, switch Mdn shut-offs, and current source Iup charges to electric capacity Ccomp, improves electric capacity Ccomp electricity
Vcomp is pressed, increases the Toff times, so as to reduce output voltage Vout, and then increases linear low density pipe Mdrain grid voltage
Vgate；Conversely, amplifier amp2 outputs are high, switch Mdn conductings, Mup shut-offs are switched, current source Iup discharges electric capacity Ccomp, drop
Low electric capacity Ccomp voltage Vcomp, reduce the Toff times, reduce linear low density pipe Mdrain grid voltage Vgate.First
Clamp circuit limits minimum Toff times Toffmin；First clamp circuit limits maximum Toff times Toffmax.
Current source Idn electric currents Iun is equal to N times of current source Iup electric currents Iup；N takes 1~50.
The concrete operating principle of the linear Ripple Suppression of LED filament lamp light adjusting circuit is：
As shown in figure 3, the electric current for loading LED is converted into voltage Vrio and control electric capacity by output electric current measure resistance Rio
Ccomp voltages Vcomp compares.The then reduction property high-voltage tube Mdrain when voltage Vrio is more than control electric capacity Ccomp voltage Vcomp
Gate voltage, so as to reduce load LED electric current；Otherwise increase high-voltage tube Mdrain gate voltage, increase load LED electricity
Stream.Second clamp circuit stop voltage Vrio maximum Vrio_max.
If the negative terminal voltage Vdrain for loading LED is higher, Mdrain points of linear low density pipe walks excessive output capacitance
Voltage on Cout, then linear low density pipe Mdrain grid voltage Vgate is relatively low, less than fixed voltage Vref2, amplifier amp2
Low, switch Mup conductings, switch Mdn shut-offs are exported, current source Iup charges to electric capacity Ccomp, improves electric capacity Ccomp voltage
Vcomp, so as to increase output current to reduce load LED negative terminal voltage Vdrain；, whereas if load LED negative terminal electricity
Press Vdrain relatively low, LED load point walks part output capacitance Cout voltage ripple, and amplifier amp2 outputs are high, and switch Mdn is led
Logical, switch Mup shut-offs, current source Iup discharges electric capacity Ccomp, reduces electric capacity Ccomp voltage Vcomp, so as to reduce output
Electric current is to ensure that output voltage ripple is all superimposed upon linear low density pipe Mdrain both ends.
The concrete operating principle of the compatible light modulation of LED filament lamp light adjusting circuit is：
As shown in figure 4, when maximum conduction angle is arrived in light modulator regulation, due to switching constant voltage circuit proof load LED anodes
Voltage stabilization, linear constant current circuit being capable of constant current Closed loop operations.
The light modulator regulation angle of flow reduces, and electric capacity Ccomp voltages are gradually reduced to reduce Toff times, and then proof load
LED anode voltage stabilizations, linear constant current circuit being capable of constant current Closed loop operations.
The light modulator regulation angle of flow continues to reduce, and the Toff times reach minimum Toff times Toffmin, switch Isobarically Control
It is changed into open loop work, output current starts to reduce.Electric capacity Ccomp voltages continue to reduce to ensure that output voltage ripple is all superimposed
At linear high-voltage tube Mdrain both ends.
Although content of the present utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to limitation of the present utility model.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the present utility model all will be apparent.It is any without departing from the utility model in essence scope
Utility model is created, and including but not limited to resistance implementation such as Rcs uses the change of conventional, electric-resistance or MOS resistance etc., to member
Msw is such as substituted for triode by the replacement of the type or model of device, the change of circuit local structure is mended as increased line voltage
Repay the nor gate in circuit, drive control circuit be changed to NAND gate realize, peripheral framework have boosting boost frameworks be changed to buck
BuckBoost frameworks or decompression buck frameworks etc., and replacement, deformation or the modification of other unsubstantialities, each fall within this reality
Within the scope of novel protected.
Claims (8)
- A kind of 1. LED filament lamp light adjusting circuit, it is characterised in that：Including comparator cmp1, Tonmax circuit, Toff control electricity Road, control drive circuit, linear constant current circuit, rectifier bridge, pi types filter circuit, inductance Lm, sustained diode out, output electricity Hold Cout and load LED；Rectifier bridge is connected with pi type filter circuits；Inductance Lm one end is connected with pi type filter circuits, and the other end is connected with sustained diode out positive pole；Load LED positive pole is connected with sustained diode out negative pole, and negative pole is connected with linear constant current circuit；Control drive circuit has driving power pipe Msw；Driving power pipe Msw drain terminal connects fly-wheel diode Dout anode；Comparator cmp1 anode is connected with driving power pipe Msw source, and negative pole is connected with the 3rd fixed voltage Vref3, defeated Go out end with controlling the input of drive circuit to be connected；The output end of Tonmax circuits is with controlling the input of drive circuit to be connected；Toff control circuits are with controlling the input of drive circuit to be connected；Output capacitance Cout one end is connected with loading LED positive pole, and the other end is connected with linear constant current circuit.
- 2. LED filament lamp light adjusting circuit as claimed in claim 1, it is characterised in that：Wherein, Toff control circuits include control electric capacity Ccomp；Linear constant current circuit includes：First amplifier amp1, linear low density pipe Mdrain, the second clamp circuit and output electric current measure Resistance Rio；First amplifier amp1 positive termination control electric capacity Ccomp；First amplifier amp1 negative terminal difference wiring high-voltage tube Mdrain source, the input of the second clamp circuit, output electricity Flow detection resistance Rio one end；The output of first amplifier amp1 output end wiring high-voltage tube Mdrain grid end, the second clamp circuit；Load LED negative pole connects high-voltage tube Mdrain drain terminal.
- 3. LED filament lamp light adjusting circuit as claimed in claim 2, it is characterised in that：Toff control circuits also include：Second amplifier amp2, current source Iup, current source Idn, switch Mup, switch Mdn, first Clamp circuit and Toff circuits；Second amplifier amp2 anode difference wiring high-voltage tube Mdrain grid end, the output of the second clamp circuit, the first fortune Put amp1 output end；Second amplifier amp2 negative terminal meets the second fixed voltage Vref2；Second amplifier amp2 output termination is opened Close Mup and switch Mdn grid；Switch Mup source class meets current source Iup；Switch Mdn source class meets current source Idn；Switch Mup drain meets switch Mdn drain, an input of Toff circuits, control electric capacity Ccomp respectively；The output of first clamp circuit connects another input of Toff circuits；The output end of Toff circuits is with controlling the input of drive circuit to be connected.
- 4. LED filament lamp light adjusting circuit as claimed in claim 1, it is characterised in that：Toff control circuits include Toff circuits；Control drive circuit also includes, the first nor gate NOR1, the second nor gate NOR2, drive circuit and peak current detection electricity Hinder Rcs；The second nor gate NOR2 of output termination of a Toff circuits input；Comparator cmp1 output termination first or non- A door NOR1 input；First nor gate NOR1 the second nor gate NOR2 of output termination another input and the input of drive circuit；Second nor gate NOR2 the first nor gate NOR1 of output termination another input；The 3rd of first nor gate NOR1 The output of individual input termination Tonmax circuits；Peak current detection resistance Rcs termination driving power pipe Msw source electrode；The output termination driving power pipe Msw of drive circuit grid.
- 5. LED filament lamp light adjusting circuit as claimed in claim 1, it is characterised in that：Wherein, pi types filter circuit includes：Filter inductance Lpi, the first electric capacity Cpi1 and the second electric capacity Cpi2；Filter inductance Lpi one end connects the output of rectifier bridge, the first electric capacity Cpi1 one end respectively；The other end meets inductance Lm respectively One end, the second electric capacity Cpi2 one end.
- 6. LED filament lamp light adjusting circuit as claimed in claim 1, it is characterised in that：Wherein, Toff control circuits, control drive circuit, linear constant current circuit, pi types filter circuit and output capacitance Cout connect Ground.
- 7. such as claim 6 to described LED filament lamp light adjusting circuit, it is characterised in that：Wherein, control electric capacity Ccomp and current source Idn one end ground connection of Toff control circuits；Control peak current detection resistance Rcs one end ground connection of drive circuit；Output electric current measure resistance Rio one end ground connection of linear constant current circuit；First electric capacity Cpi1 of pi type filter circuits and second electric capacity Cpi2 one end are all grounded.
- 8. LED filament lamp light adjusting circuit as claimed in any of claims 1 to 7 in one of claims, it is characterised in that：The LED filament lamp light adjusting circuit can apply to boost boost frameworks, buck buckBoost frameworks and decompression Buck frameworks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408366.1U CN206686409U (en) | 2017-04-18 | 2017-04-18 | A kind of LED filament lamp light adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408366.1U CN206686409U (en) | 2017-04-18 | 2017-04-18 | A kind of LED filament lamp light adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206686409U true CN206686409U (en) | 2017-11-28 |
Family
ID=60400763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720408366.1U Active CN206686409U (en) | 2017-04-18 | 2017-04-18 | A kind of LED filament lamp light adjusting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206686409U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831844A (en) * | 2018-12-18 | 2019-05-31 | 陕西亚成微电子股份有限公司 | A kind of no stroboscopic High Power Factor LED driving method and circuit |
| CN112672461A (en) * | 2019-10-16 | 2021-04-16 | 东林科技股份有限公司 | Dimming circuit, dimmer with dimming circuit and controller of dimmer |
-
2017
- 2017-04-18 CN CN201720408366.1U patent/CN206686409U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831844A (en) * | 2018-12-18 | 2019-05-31 | 陕西亚成微电子股份有限公司 | A kind of no stroboscopic High Power Factor LED driving method and circuit |
| CN109831844B (en) * | 2018-12-18 | 2024-03-22 | 陕西亚成微电子股份有限公司 | Stroboflash-free high-power-factor LED driving method and circuit |
| CN112672461A (en) * | 2019-10-16 | 2021-04-16 | 东林科技股份有限公司 | Dimming circuit, dimmer with dimming circuit and controller of dimmer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104661392A (en) | Constant-current driving circuit for LED switch | |
| CN104578800A (en) | Control circuit of switch power supply and switch power supply provided with control circuit | |
| CN104768265A (en) | High-power LED constant-current driving circuit | |
| CN106322321A (en) | LED illumination down lamp with protection constant current drive | |
| CN103345903A (en) | LED backlight system and display device | |
| CN102769981A (en) | Intelligent constant-current driver realized by embedded chip and control method of intelligent constant-current driver | |
| CN203313490U (en) | LED current ripple elimination driving circuit | |
| CN102811530A (en) | Voltage-rising type LED driving circuit and lamp | |
| CN103458554A (en) | LED drive circuit and LED lamp | |
| CN206686409U (en) | A kind of LED filament lamp light adjusting circuit | |
| CN102832818A (en) | Constant-voltage power circuit based on single chip processor and constant-voltage power supply device | |
| CN1725927A (en) | LED chip drive circuit | |
| CN102833902A (en) | Boosting LED (light-emitting diode) constant-current drive circuit | |
| US10143061B2 (en) | Constant current power supply with a plurality of current outputs for LED lamps | |
| CN203814023U (en) | PAM2842-based dimmable LED driver | |
| CN203590562U (en) | LED switch constant current driving circuit | |
| CN209676109U (en) | A kind of control circuit and equipment adjusting electric current | |
| CN205546091U (en) | LED filament lamp dimmer circuit | |
| CN110611292A (en) | PFC circuit and protection circuit thereof | |
| CN203590567U (en) | AC power supply-based LED drive circuit with function of automatic illumination intensity adjusting | |
| CN103313491B (en) | Digital dimming control system for light-emitting diode (LED) and method thereof | |
| CN105517244A (en) | LED (light-emitting diode) driving circuit and method for controlling conduction/cut-off time of switching power supply | |
| CN109819548A (en) | A kind of PWM constant-current dimming circuit of 60-200V high-voltage LED lamp bead | |
| CN211655724U (en) | PFC circuit and protection circuit thereof | |
| CN211090060U (en) | L ED backlight driving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |