CN209731659U - LED drive circuit and headlamp - Google Patents
LED drive circuit and headlamp Download PDFInfo
- Publication number
- CN209731659U CN209731659U CN201920213968.0U CN201920213968U CN209731659U CN 209731659 U CN209731659 U CN 209731659U CN 201920213968 U CN201920213968 U CN 201920213968U CN 209731659 U CN209731659 U CN 209731659U
- Authority
- CN
- China
- Prior art keywords
- module
- connect
- led light
- constant
- control
- 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.)
- Expired - Fee Related
Links
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 87
- 230000005669 field effect Effects 0.000 claims description 50
- 238000004804 winding Methods 0.000 claims description 33
- 239000003990 capacitor Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 239000004065 semiconductor Substances 0.000 description 6
- 238000005286 illumination Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a kind of LED drive circuit and headlamp, LED drive circuit includes boosting Voltage stabilizing module and constant-current driven module；The first input end of the boosting Voltage stabilizing module is for connecting the first power supply, the output end of the boosting Voltage stabilizing module is used to connect the anode of LED light, the first end of the constant-current driven module is used to connect the cathode of the LED light, the second end of the constant-current driven module is for connecting second source, boosting Voltage stabilizing module is by power boost at LED light voltage rating, export stable DC, and the ripple voltage in power supply is filtered out, steady dc voltage is provided for LED light, electric current when by the way that constant-current driven module is arranged LED light being worked is constant, therefore, pass through setting boosting Voltage stabilizing module and constant-current driven module, the jump of current or voltage when can reduce LED light work, it is shinny without stroboscopic that LED light may be implemented.
Description
Technical field
The utility model relates to field of LED drive technologies, more particularly to LED drive circuit and headlamp.
Background technique
The spies such as LED (Light-Emitting Diode, light emitting diode) headlamp is long, pollution-free with the service life, light efficiency is high
Point is that the light source of green high-efficient is widely used in lighting area.LED illumination lamp is needed using suitable direct-current LED driving power
When could work normally, but light LED illumination lamp due to traditional LED drive power, there are serious stroboscopic phenomenons, easily cause
User's visual fatigue injures greatly eyes of user, influences user experience, be unable to satisfy user demand.
Utility model content
Based on this, the phenomenon that there are serious stroboscopics for traditional LED drive power driving LED light, a kind of LED driving is provided
Circuit and headlamp.
A kind of LED drive circuit, including boosting Voltage stabilizing module and constant-current driven module；The first of the boosting Voltage stabilizing module
Input terminal is used to connect the anode of LED light for connecting the first power supply, the output end of the boosting Voltage stabilizing module, and the constant current is driven
The first end of dynamic model block is used to connect the cathode of the LED light, and the second end of the constant-current driven module is for connecting the second electricity
Source.
The boosting Voltage stabilizing module includes transformer T2, boosting voltage stabilizing chip U3 and field effect in one of the embodiments,
Should pipe Q5, the transformer T2 include armature winding and secondary windings, the armature winding is coupled with the secondary windings, described
The first end of armature winding is used to connect the anode of the LED light for connecting the first power supply, the second end of the armature winding,
The secondary windings is connect with the first input end of the boosting voltage stabilizing chip U3, the first output of the boosting voltage stabilizing chip U3
End is connect with the grid of the field-effect tube Q5, and the second output terminal of the boosting voltage stabilizing chip U3 is with the field-effect tube Q5's
Source electrode connection, the drain electrode of the field-effect tube Q5 are connect with the second end of the armature winding.
The constant-current driven module includes resistance R1, capacitor C1 and constant current chip U4 in one of the embodiments, described
The first end of constant current chip U4 is used to connect the cathode of the LED light, and the second end of the constant current chip U4 is for connecting second
Power supply, the third end of the constant current chip U4 are used to connect by the resistance R1 with third power supply, the constant current chip U4's
Second end is connect by the capacitor C1 with the third end of the constant current chip U4.
The LED drive circuit further includes control module and first switch module in one of the embodiments, described
The output end of control module is connect with the control terminal of first switch module, and the first end of the first switch module is used to be grounded,
The second end of the first switch module is connect with the third end of the constant-current driven module.
Constant-current driven module described in the LED drive circuit drives including the first constant current in one of the embodiments,
Submodule and the second constant current driven submodule, the LED light include the first LED light and the second LED light, the first switch module
Including the first control switch and the second control switch, it is described boosting Voltage stabilizing module output end for respectively with the first LED
The first end of the anode of lamp and the connection of the anode of second LED light, the first constant current driven submodule is described for connecting
The cathode of first LED light, the second end of the first constant current driven submodule are driven for connecting second source, first constant current
The third end of mover module is connect with the second end of first control switch, and the first end of first control switch is for connecing
Ground, the control terminal of first control switch are connect with the first output end of the control module, the second constant current driving
The first end of module is used to connect the cathode of second LED light, and the second end of the second constant current driven submodule is for connecting
Second source is connect, the third end of the second constant current driven submodule is connect with the second end of second control switch, described
The first end of second control switch is for being grounded, the second output of the control terminal and the control module of second control switch
End connection.
The LED drive circuit further includes infrared remote receiver in one of the embodiments, the infrared remote receiver with
The input terminal of the control module connects.
The LED drive circuit further includes voltage changing module in one of the embodiments, the input of the voltage changing module
End is connect for connecting the first power supply, the output end of the voltage changing module with the power end of the control module.
The LED drive circuit includes secondary control module in one of the embodiments, the control module it is defeated
Outlet is also connect with the first input end of the secondary control module, and the second input terminal of the secondary control module is for connecting
4th power supply, the output end of the secondary control module are connect with the second input terminal of the boosting Voltage stabilizing module.
The LED drive circuit further includes second switch module in one of the embodiments, the second switch mould
The control terminal of block is connect with the output end of the secondary control module, and the first end of the second switch module is described for connecting
The cathode of LED light, the second end of the switch module are connect with the first end of the constant-current driven module.
A kind of headlamp, comprising: LED light and any of the above-described LED drive circuit as described in the examples, the boosting pressure stabilizing
The first input end of module is connect for connecting power supply, the output end of the boosting Voltage stabilizing module with the anode of the LED light, institute
The cathode for stating LED light is connect with the first end of the constant-current driven module, and the second end of the constant-current driven module is for connecting
Second source.
Above-mentioned LED drive circuit and headlamp, for boosting Voltage stabilizing module by power boost at LED light voltage rating, output is steady
Fixed direct current, and the ripple voltage in power supply is filtered out, steady dc voltage is provided for LED light, is driven by setting constant current
Electric current when dynamic model block makes LED light work is constant, therefore, can by setting boosting Voltage stabilizing module and constant-current driven module
The jump of current or voltage, it is shinny without stroboscopic to may be implemented LED light when reducing LED light work.
Detailed description of the invention
Fig. 1 is the structural block diagram of LED drive circuit in one embodiment；
Fig. 2 is the structural block diagram of LED drive circuit in another embodiment；
Fig. 3 is the structural block diagram of LED drive circuit in another embodiment；
Fig. 4 is the circuit diagram of constant-current driven module in one embodiment；
Fig. 5 is the circuit diagram of boosting Voltage stabilizing module and secondary control module in one embodiment；
Fig. 6 is the circuit diagram of control module in one embodiment；
Fig. 7 is the circuit diagram of voltage changing module in one embodiment；
Fig. 8 is the circuit diagram of rectification filtering module in one embodiment；
Fig. 9 is the structural block diagram of headlamp in one embodiment.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The better embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms
It realizes, however it is not limited to embodiments described herein.On the contrary, the purpose of providing these embodiments is that making practical new to this
The disclosure of type understands more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Term used herein is intended merely to description specific embodiment
Purpose, it is not intended that in limitation the utility model.
For example, a kind of LED drive circuit, including boosting Voltage stabilizing module and constant-current driven module；The boosting Voltage stabilizing module
First input end for connecting the first power supply, the output end of the boosting Voltage stabilizing module is used to connect the anode of LED light, described
The first end of constant-current driven module is used to connect the cathode of the LED light, and the second end of the constant-current driven module is for connecting
Second source.
Power boost at LED light voltage rating, is exported stable direct current by above-mentioned LED drive circuit, the Voltage stabilizing module that boosts
Electricity, and the ripple voltage in power supply is filtered out, steady dc voltage is provided for LED light, is made by the way that constant-current driven module is arranged
Electric current when obtaining LED light work is constant, therefore, by setting boosting Voltage stabilizing module and constant-current driven module, can reduce LED light
The jump of current or voltage, it is shinny without stroboscopic to may be implemented LED light when work.
In one of the embodiments, referring to Fig. 1, providing a kind of LED drive circuit 10 includes boosting Voltage stabilizing module 100
And constant-current driven module 200；The first input end of the boosting Voltage stabilizing module 100 is for connecting the first power supply 120, the boosting
The output end of Voltage stabilizing module 100 is used to connect the anode of LED light, and the first end of the constant-current driven module 200 is for connecting institute
The cathode of LED light is stated, the second end of the constant-current driven module 200 is for connecting second source 130.Wherein, boost pressure stabilizing mould
Block 100 is used to provide steady dc voltage for LED light by power boost and for LED light, and constant-current driven module is used for so that stream
Electric current through LED light is constant.In one embodiment, first power supply is DC power supply, in one embodiment, described the
Two power supplys are ground, and the second end of the constant-current driven module is for connecting second source, i.e., the second of the described constant-current driven module
End is for being grounded.In one embodiment, the second source is the cathode of power supply, and first power supply is the anode of power supply.
Power boost at LED light voltage rating, is exported stable direct current by above-mentioned LED drive circuit, the Voltage stabilizing module that boosts
Electricity, and the ripple voltage in power supply is filtered out, steady dc voltage is provided for LED light, is made by the way that constant-current driven module is arranged
Electric current when obtaining LED light work is constant, therefore, by setting boosting Voltage stabilizing module and constant-current driven module, can reduce LED light
The jump of current or voltage when work, it is shinny without stroboscopic to may be implemented LED light, and the reduction of LED light reactive power may be implemented,
Realize that high power factor driving LED light is shinny.
For the Voltage stabilizing module output stable DC electricity that makes to boost, Fig. 4 and Fig. 5 are please referred in one of the embodiments, institute
Stating boosting Voltage stabilizing module 100 includes that transformer T2, boosting voltage stabilizing chip U3 and field-effect tube Q5, the transformer T2 include primary
Winding and secondary windings, the armature winding are coupled with the secondary windings, and the first end of the armature winding is for connecting the
One power supply, the second end of the armature winding are used to connect the anode of the LED light, the secondary windings and the boosting pressure stabilizing
The first input end of chip U3 connects, and the first output end of the boosting voltage stabilizing chip U3 and the grid of the field-effect tube Q5 connect
It connects, the second output terminal of the boosting voltage stabilizing chip U3 is connect with the source electrode of the field-effect tube Q5, the field-effect tube Q5's
Drain electrode is connect with the second end of the armature winding.By the voltage stabilizing chip U3 and field-effect tube Q5 that boosts, the first of transformer is adjusted
The voltage of grade winding, so that the voltage rating of the boost in voltage of the first power supply to LED light is provided to burning voltage for LED light, and
The ripple voltage of first power supply is filtered out, the jump of voltage when reducing LED light work, to reduce LED stroboscopic phenomenon.
In order to give LED light provide constant current, reduce LED stroboscopic phenomenon, in one of the embodiments, referring to Fig. 4,
The constant-current driven module includes the first end of resistance R1, capacitor C1 and constant current chip U4, the constant current chip U4 for connecting
The cathode of the LED light, the second end of the constant current chip U4 is for connecting second source, the third end of the constant current chip U4
For being connect by the resistance R1 with third power supply, the second end of the constant current chip U4 passes through the capacitor C1 and the perseverance
Flow the third end connection of chip U4.In the present embodiment, second source is ground, i.e., the second end of the described constant current chip U4 is for connecing
Ground.In one embodiment, the third power supply is 5V DC power supply.By the way that constant current chip U4 is arranged, so that the electricity in circuit
Flow constant, i.e. the operating current of LED light is constant, the jump of electric current when less LED light works, to reduce LED stroboscopic phenomenon.
It can control the light on and off of LED light for the ease of user, in one of the embodiments, referring to Fig. 2, the LED drives
Dynamic circuit 10 further includes control module 300 and first switch module 400, the output end and first switch of the control module 300
The control terminal of module 400 connects, and the first end of the first switch module 400 is used to be grounded, the first switch module 400
Second end is connect with the third end of the constant-current driven module 200.Specifically, the second end of the first switch module with it is described
The third end of constant current chip U4 connects, and in one embodiment, the first switch module includes field-effect tube Q1, the control
The output end of module is connect with the grid of the field-effect tube Q1, and the source electrode of the field-effect tube Q1 is for being grounded, the field effect
Should the drain electrode of pipe Q1 connect with the third end of the constant current chip U4.In one embodiment, the first switch includes MOS
(metal-oxide-semiconductor, metal-oxide semiconductor fieldeffect transistor) pipe Q1.In one embodiment
In, the control module includes single-chip microcontroller, and by the way that such control module and first switch module is arranged, user passes through manipulation control
Molding block issues corresponding control signal, and first switch module is according to the control signal received, and the of control first switch module
One end and second end are turned on or off, so that LED light is lighted or extinguished, consequently facilitating the light on and off of user's control LED.
Specifically, the control signal is PWM (Pulse Width Modulation, pulse width modulation) signal.
In order to make LED drive circuit that the adjusting of colour temperature may be implemented, Fig. 3 and figure are please referred in one of the embodiments,
4, the constant-current driven module includes the first constant current driven submodule 210 and the second constant current driven submodule 220, the LED light
Including the first LED light and the second LED light, the first LED light is the LED1 in figure, and the second LED light is the LED2 in figure, described first
Switch module includes the first control switch 410 and the second control switch 420, and the output end of the boosting Voltage stabilizing module 100 is used for
It is connect respectively with the anode of the anode of first LED light and second LED light, the first constant current driven submodule 210
First end be used to connect the cathode of first LED light, the second end of the first constant current driven submodule 210 is for connecting
The third end of second source, the first constant current driven submodule 210 is connect with the second end of first control switch 410,
The first end of first control switch 410 is for being grounded, the control terminal and the control module of first control switch 410
300 the first output end connection, the first end of the second constant current driven submodule 220 is for connecting second LED light
Cathode, the second end of the second constant current driven submodule 220 is for connecting second source, the second constant current driven submodule
220 third end is connect with the second end of second control switch 420, and the first end of second control switch 420 is used for
Ground connection, the control terminal of second control switch 420 are connect with the second output terminal of the control module 300.Implement at one
In example, the first constant current driven submodule 210 includes resistance R1, capacitor C1 and constant current chip U4, the constant current chip U4's
First end is used to connect the cathode of first LED light, and the second end of the constant current chip U4 is described for connecting second source
For being connect by the resistance R1 with third power supply, the second end of the constant current chip U4 passes through at the third end of constant current chip U4
The capacitor C1 is connect with the third end of the constant current chip U4, and the third end of the constant current chip U4 is also controlled with described first
The second end of switch connects, in one embodiment, the second constant current driven submodule 220 include resistance R2, capacitor C2 and
The first end of constant current chip U5, the constant current chip U5 are used to connect the cathode of second LED light, the constant current chip U5's
Second end is used to connect by the resistance R2 and third power supply for connecting second source, the third end of the constant current chip U5
It connects, the second end of the constant current chip U5 is connect by the capacitor C2 with the third end of the constant current chip U5, the constant current
The third end of chip U5 is also connect with the second end of second control switch, and in one embodiment, first control is opened
Closing includes field-effect tube Q1, and second control switch includes field-effect tube Q2, the grid of the field-effect tube Q1 and the control
First output end of molding block connects, and the source electrode of the field-effect tube Q1 is for being grounded, the drain electrode of the field-effect tube Q1 and institute
The third end connection of constant current chip U4 is stated, the grid of the field-effect tube Q2 is connect with the second output terminal of the control module,
For being grounded, the drain electrode of the field-effect tube Q2 connects the source electrode of the field-effect tube Q2 with the third end of the constant current chip U5
It connects.In one embodiment, first control switch includes metal-oxide-semiconductor Q1, and second control switch includes metal-oxide-semiconductor Q2.In
In one embodiment, the colour temperature that first LED light and second LED light export is different.In this way, being controlled by control module
First control switch and the second control switch are switched on or off, to control the first constant current driven submodule driving the respectively
One LED light light or extinguish and the second constant current driven submodule drive the second LED light light or extinguish, then can according to
Family demand, controls the first different LED light of colour temperature by control module and the second LED light is lighted or extinguished, to realize color
The adjusting of temperature.
It lights or extinguishes for the ease of user's control LED light, one embodiment exists wherein, referring to Fig. 6, described
LED drive circuit further includes infrared remote receiver 640, and the infrared remote receiver 640 and the input terminal of the control module 300 connect
It connects.By the way that infrared remote receiver is arranged, then user makes control module export corresponding control signal by remote control IR remote controller, with
Light or extinguish convenient for user's control LED light, and by IR remote controller control the first LED light and the second LED light light or
Person extinguishes, consequently facilitating user adjusts the colour temperature of LED light.
For the ease of powering to control module, LED drive circuit 10 described in Fig. 2 are please referred in one of the embodiments,
Further include voltage changing module 700, the input terminal of the voltage changing module 700 for connecting the first power supply, the voltage changing module 700 it is defeated
Outlet is connect with the power end of the control module 300, and the DC voltage of the first power supply is depressured by voltage changing module, is converted to low
Straightening galvanic electricity, for control module power supply, so that the electric energy of control module is from the first power supply, without additionally powering up, from
And convenient for powering to control module, in one embodiment, the low-voltage DC is 16V.
In order to make voltage changing module preferably provide stable voltage for control module, please join in one of the embodiments,
Fig. 7 and Fig. 8 are read, the LED drive circuit further includes filter module 710, and the input terminal of the filter module 710 is for connecting
First power supply, the output end of the filter module 710 are connect with the input terminal of the voltage changing module 700, in one embodiment,
The filter module includes the anode of diode D4, capacitor EC1, capacitor EC2 and inductance L2, the diode D4 for connecting institute
The first power supply is stated, the cathode of the diode D4 is connect by inductance L2 with the input terminal of the voltage changing module, the inductance L2
First end for being grounded by capacitor EC1, the second end of the inductance L2 by capacitor EC2 for being grounded, in an implementation
In example, the capacitor EC1 and capacitor EC2 are aluminum capacitor, the anode of the capacitor EC1 and the of the triode Q7 inductance L2
One end connection, for being grounded, the anode of the capacitor EC2 is connect the cathode of the capacitor EC1 with the second end of the inductance L2,
The cathode of the capacitor EC2 is for being grounded, in one embodiment, the input terminal of the filter module and the rectifying and wave-filtering mould
The output end of block 800 connects.By the way that such low-pass filtering module is arranged, so that voltage changing module is preferably by the first power supply
It is converted to low-voltage DC, so that voltage changing module be made preferably to provide stable voltage for control module.
In order to reduce LED drive circuit no-load standby power losses, Fig. 2 and Fig. 5 are please referred in one of the embodiments, institute
Stating LED drive circuit 10 includes secondary control module 500, and the output end of the control module 300 also controls mould with the auxiliary
The first input end of block 500 connects, and the second input terminal of the secondary control module 500 is described auxiliary for connecting the 4th power supply
The output end of control module 500 and the second input terminal of the boosting Voltage stabilizing module 100 is helped to connect.Specifically, the auxiliary control
The output end of molding block is connect with the second input terminal of the boosting voltage stabilizing chip U3, that is, the output of the secondary control module
End with it is described boosting voltage stabilizing chip U3 VDD pin connect, in one embodiment, the 4th power supply be DC power supply, one
A embodiment is, the 4th power supply is 16V DC power supply, by being arranged secondary control module, i.e. the of boosting Voltage stabilizing module
Two input terminals are used to connect power supply by secondary control module, then when LED light does not work or is standby, i.e., control module controls the
When the first end and second end of one switch module disconnects, corresponding control signal is sent to secondary control module by control module,
So that secondary control module disconnects the second input terminal of the Voltage stabilizing module that boosts and power supply, so that boosting Voltage stabilizing module does not work,
To reduce no-load standby power losses, and reduce electric energy loss of the LED in standby mode, to reduce waste of energy, when with
When family needs lightening LED lamp, since control module is in normal power supply state, corresponding control signal is issued by control module, is made
It obtains secondary control module the second input terminal of the Voltage stabilizing module that boosts is connected with power supply, boosting pressure stabilizing is worked normally,
So as to lightening LED lamp.It is reduced to specifically, can be no-load standby power losses by the such secondary control module of setting
0.5W。
In order to disconnect secondary control module by the second input terminal of the Voltage stabilizing module that boosts and power supply, wherein one
In a embodiment, Fig. 4 to 6 is please referred to, the auxiliary power module includes field-effect tube Q6, triode Q7 and resistance R57, described
The grid of field-effect tube Q6 is connect with the output end of the control module, and the source electrode of the field-effect tube Q6 is described for being grounded
The drain electrode of field-effect tube Q6 is connect with the base stage of the triode Q7, and the ground level of the triode Q7 also passes through the resistance R57
It is connect with the collector of the triode Q7, the collector of the triode Q7 is also used to connect the 4th power supply, the triode
The emitter of Q7 is connect with the second input terminal of the boosting Voltage stabilizing module.By the way that such secondary control module, control is arranged
While module controls the disconnection of first switch module first end and second end, the drain electrode and source electrode for controlling field-effect tube Q6 are disconnected,
So that the 4th power supply can not give boosting Voltage stabilizing module by triode, to realize secondary control module by the Voltage stabilizing module that boosts
Second input terminal and power supply disconnect.
In one embodiment, the first output end of the control module and second output terminal with the auxiliary power supply mould
The first input end of block connects, i.e., the first output end and second output terminal of the described control module are with the field-effect tube Q6's
Output end connection.
In order to which the Voltage stabilizing module that makes to boost is without additional connection power supply, optimizes circuit, please refer in one of the embodiments,
Fig. 2 and Fig. 5, the output end of the voltage changing module 700 are also connect with the second input terminal of the secondary control module 500, specifically
, the output end of the voltage changing module is also connect with the collector of the triode Q7, the output end of voltage changing module with it is described auxiliary
The second input terminal of control module is helped to connect, i.e., the output end of voltage changing module passes through secondary control module and the boosting pressure stabilizing mould
Block connection, voltage changing module by the first power conversion at low-voltage, i.e., voltage changing module by the first power conversion at the 4th power supply, with for
The Voltage stabilizing module that boosts provides power supply, and boosting Voltage stabilizing module is worked normally, so that boosting Voltage stabilizing module is not necessarily to volume
Outer connection power supply optimizes circuit.
In order to be further reduced no-load standby power losses, in one of the embodiments, referring to Fig. 2, LED driving electricity
Road 10 further includes second switch module 600, the control terminal of the second switch module 600 and the secondary control module 500
Output end connection, the first end of the second switch module 600 are used to connect the cathode of the LED light, the second switch mould
The second end of block 600 is connect with the first end of the constant-current driven module 200.By the way that second switch module is arranged, then at LED light
When standby or off position, secondary control module issues corresponding control signal, to control the first end of second switch module
It is disconnected with second end, so that circuit power loss, thus be further reduced no-load standby power losses, i.e., the loss of electric energy when LED light is standby,
Waste of energy is reduced, when user needs lightening LED lamp, control module need to be only manipulated and issue corresponding control signal, can both make
LED light is lighted or is worked normally.
In one embodiment, Fig. 3 and Fig. 4 are please referred to, the second switch module includes third control switch 610 and
Four control switches 620, the control terminal of the third control switch 610 are connect with the output end of the secondary control module 500, institute
The first end for stating third control switch 610 is used to connect the cathode of first LED light, and the second of the third control switch 610
End is connect with the first end of the first constant current driven submodule 210, and the control terminal of the 4th control switch 620 is for connecting
The second output terminal of the secondary control module 500, the first end of the 4th control switch 620 is for connecting described second
The cathode of LED light, the second end of the 4th control switch 620 are used to connect the first end of the second constant current driven submodule 220.
In one embodiment, the third control switch includes field-effect tube Q3, and the 4th control switch includes field-effect tube Q4,
The grid of the field-effect tube Q3 is connect with the output end of the secondary control module, the source electrode of the field-effect tube Q3 and institute
The first end connection of the first constant current driven submodule is stated, the drain electrode of the field-effect tube Q3 is for connecting first LED light
The grid of cathode, the field-effect tube Q4 is connect with the output end of the secondary control module, the source electrode of the field-effect tube Q4
It is connect with the first end of the second constant current driven submodule, the drain electrode of the field-effect tube Q4 is for connecting the second LED light
Cathode connection, in one embodiment, the third control switch includes metal-oxide-semiconductor Q3, and the 4th control switch includes metal-oxide-semiconductor
Q4。
In order to allow LED drive circuit, as power supply, to please refer to Fig. 2 in one of the embodiments, using alternating current
And Fig. 8, the LED drive circuit 10 further include rectification filtering module 800, the input terminal of the rectification filtering module 800 is used
In connection electric main, the first input end of the input terminal of the rectification filtering module 800 and the boosting Voltage stabilizing module 100 connects
It connects.In one embodiment, the output end of the rectification filtering module is also connect with the input terminal of voltage changing module.Implement at one
In example, the rectification filtering module 800 includes bridge rectifier submodule 810 and low-pass filtering submodule 820, the bridge rectifier
For the input terminal of submodule for connecting voltage, the output end of the bridge rectifier submodule is defeated with the low-pass filtering submodule
Enter end connection, the output end of the low-pass filtering submodule is connect with the first input end of the boosting Voltage stabilizing module.By setting
Rectification filtering module is set, electric main can be converted to DC voltage, to be provided directly for voltage changing module and boosting Voltage stabilizing module
Galvanic electricity, so that LED drive circuit can be directly connected to electric main, i.e. LED drive circuit can use alternating current conduct
Power supply.
In one embodiment, Fig. 4 and Fig. 5 are please referred to, the input terminal of the rectification filtering module is for connecting exchange city
Electricity, the output end of the rectification filtering module are connect with the first end of the armature winding, the secondary windings and the boosting
The VCC pin of voltage stabilizing chip U3 connects, and the G pin of the boosting voltage stabilizing chip U3 is connect with the grid of the field-effect tube Q5,
The CS pin of the boosting voltage stabilizing chip U3 is connect with the source electrode of the field-effect tube Q5, the output end of the secondary control module
It being connect with the VDD pin of the boosting voltage stabilizing chip U3, the IN pin of the constant current chip U4 is used to connect the cathode of LED light,
The GND pin of the constant current chip U4 is for being grounded, and the of the CS pin of the constant current chip U4 and the first switch module
One end connection.
In one of the embodiments, referring to Fig. 9, it includes: LED light 900 and any of the above-described for providing a kind of headlamp 20
LED drive circuit as described in the examples, the first input end of the boosting Voltage stabilizing module 100 is for connecting power supply, the liter
The output end of pressure Voltage stabilizing module 100 is connect with the anode of the LED light 900, and the cathode of the LED light 900 and the constant current are driven
Dynamic model block 200 connects.
Power boost at LED light voltage rating, is exported stable DC by above-mentioned headlamp, boosting Voltage stabilizing module, and
Ripple voltage in power supply is filtered out, provides steady dc voltage for LED light, makes LED by the way that constant-current driven module is arranged
Electric current when lamp works is constant, therefore, by setting boosting Voltage stabilizing module and constant-current driven module, can reduce LED light work
When current or voltage jump, it is shinny without stroboscopic that LED light may be implemented.
In one embodiment, the LED light includes the first LED light and the second LED light, the anode of first LED light
And the anode of second LED light with it is described boosting Voltage stabilizing module output end connect, the cathode of first LED light with it is described
The first end of first constant current driven submodule connects, the cathode of second LED light and the second constant current driven submodule
Second end connection.
In one embodiment, Fig. 4 to 8 is please referred to, a kind of headlamp is provided, which includes: rectifying and wave-filtering mould
Block 800, boosting Voltage stabilizing module 100, voltage changing module 700, the first LED light, the second LED light, constant-current driven module 200, first open
Module 400, second switch module 600, control module 300, secondary control module 500 and voltage changing module 700 are closed, the boosting is steady
Die block 100 includes transformer T2, boosting voltage stabilizing chip U3 and field-effect tube Q5, and the first switch module includes the first control
Switch and the second control switch, the second switch module include third control switch and the 4th control switch, and the constant current is driven
Dynamic model block 200 includes the first constant current driven submodule 210 and the second constant current driven submodule 220, the secondary control module packet
Field-effect tube Q6, triode Q7 and resistance R57 are included, the input terminal of the rectification filtering module 800 is for connecting electric main, institute
The output end for stating rectification filtering module 800 is connect with the first end of the armature winding of the transformer T2, the transformer T2's
The second end of armature winding is used to be separately connected the anode of the first LED light and the anode of the second lamp, the primary of the transformer T2
Winding is coupled with the secondary windings of the transformer T2, and the secondary windings of the transformer T2 is with the boosting voltage stabilizing chip U3's
First output end of first input end connection, the boosting voltage stabilizing chip U3 is connect with the grid of the field-effect tube Q5, described
The second output terminal of boosting voltage stabilizing chip U3 is connect with the source electrode of the field-effect tube Q5, the drain electrode of the field-effect tube Q5 and institute
State the second end connection of the armature winding of transformer T2, the cathode of first LED light and the first of the third control switch
End connection, the second end of the third control switch connect with the first end of the first constant current driven submodule 210, and described the
The second end of one constant current driven submodule 210 is for being grounded, and the third end of the first constant current driven submodule 210 is for connecting
Third power supply, the cathode of second LED light are connect with the first end of the 4th control switch, the 4th control switch
Second end is connect with the first end of the second constant current driven submodule 220, and the second of the second constant current driven submodule 220
End is for being grounded, and the third end of the second constant current driven submodule 220 is for connecting third power supply, the rectification filtering module
800 output end is also connect with the input terminal of the voltage changing module 700, the output end of the voltage changing module 700 and the control
The power end of module 300 connects, and the control terminal of the first output end of the control module 300 and first control switch connects
It connects, the second end of first control switch for being grounded, drive by the first end of first control switch and first constant current
The third end of mover module 210 connects, the control terminal of the second output terminal of the control module 300 and second control switch
Connection, the second end of second control switch is for being grounded, the first end of second control switch and second constant current
The third end of driven submodule 220 connects, the first output end and second output terminal of the control module 300 also with field-effect tube
The grid of Q6 connects, and the source electrode of the field-effect tube Q6 is for being grounded, the drain electrode of the field-effect tube Q6 and the triode Q7
Base stage connection, the ground level of the triode Q7 also passes through the resistance R57 and connect with the collector of the triode Q7, described
The collector of triode Q7 is also connect with the output end of voltage changing module 700, and the emitter of the triode Q7 and the boosting are steady
Press the second input terminal connection of chip U2, the emitter of the triode Q7 also control terminal with the third control switch respectively
And the 4th control switch control terminal connection.
Made by setting boosting Voltage stabilizing module and constant-current driven module so that LED light provides stable electric current and voltage
LED light is shinny without stroboscopic, and the reduction of LED light reactive power may be implemented, and realizes that high power factor driving LED light is shinny, leads to
The first LED light of setting and the second LED light are crossed, user is by manipulation control module so that the first control switch controls the first LED light
Light or extinguishing and the second control switch control the second LED light and light or extinguish, to realize the adjusting of colour temperature, and
When LED light is in no-load standby state, control module sends control signal, so that secondary control module is by voltage changing module and rises
Voltage stabilizing chip U3 is pressed to disconnect, and secondary control module control third control switch and the 4th switch disconnect, to reduce illumination
Lamp no-load standby power losses reduce waste of energy.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of LED drive circuit, which is characterized in that including boosting Voltage stabilizing module and constant-current driven module；
The first input end of the boosting Voltage stabilizing module is used for for connecting the first power supply, the output end of the boosting Voltage stabilizing module
The anode of LED light is connected, the first end of the constant-current driven module is used to connect the cathode of the LED light, the constant current driving
The second end of module is for connecting second source.
2. LED drive circuit according to claim 1, which is characterized in that the boosting Voltage stabilizing module include transformer T2,
Boosting voltage stabilizing chip U3 and field-effect tube Q5, the transformer T2 include armature winding and secondary windings, the armature winding with
The secondary windings coupling, the first end of the armature winding are used for connecting the first power supply, the second end of the armature winding
In the anode for connecting the LED light, the secondary windings is connect with the first input end of the boosting voltage stabilizing chip U3, the liter
The first output end of pressure voltage stabilizing chip U3 is connect with the grid of the field-effect tube Q5, and the second of the boosting voltage stabilizing chip U3 is defeated
Outlet is connect with the source electrode of the field-effect tube Q5, and the drain electrode of the field-effect tube Q5 connects with the second end of the armature winding
It connects.
3. LED drive circuit according to claim 1, which is characterized in that the constant-current driven module includes resistance R1, electricity
Hold the first end of C1 and constant current chip U4, the constant current chip U4 for connecting the cathode of the LED light, the constant current chip U4
Second end for connecting second source, the third end of the constant current chip U4 is used for through the resistance R1 and third power supply company
It connects, the second end of the constant current chip U4 is connect by the capacitor C1 with the third end of the constant current chip U4.
4. LED drive circuit according to claim 1, which is characterized in that it further include control module and first switch module,
The output end of the control module is connect with the control terminal of first switch module, and the first end of the first switch module is for connecing
Ground, the second end of the first switch module are connect with the third end of the constant-current driven module.
5. LED drive circuit according to claim 4, which is characterized in that the constant-current driven module includes the first constant current
Driven submodule and the second constant current driven submodule, the LED light include the first LED light and the second LED light, the first switch
Module includes the first control switch and the second control switch, and the output end of the boosting Voltage stabilizing module is for respectively with described first
The anode of LED light and the connection of the anode of second LED light, the first end of the first constant current driven submodule is for connecting institute
The cathode of the first LED light is stated, the second end of the first constant current driven submodule is for connecting second source, first constant current
The third end of driven submodule is connect with the second end of first control switch, and the first end of first control switch is used for
Ground connection, the control terminal of first control switch are connect with the first output end of the control module, the second constant current driving
The first end of submodule is used to connect the cathode of second LED light, and the second end of the second constant current driven submodule is used for
Second source is connected, the third end of the second constant current driven submodule is connect with the second end of second control switch, institute
The first end of the second control switch is stated for being grounded, the second of the control terminal of second control switch and the control module is defeated
Outlet connection.
6. LED drive circuit according to claim 4 or 5, which is characterized in that it further include infrared remote receiver, it is described infrared
Receiver is connect with the input terminal of the control module.
7. LED drive circuit according to claim 4 or 5, which is characterized in that it further include voltage changing module, the transformation mould
The input terminal of block is connect for connecting the first power supply, the output end of the voltage changing module with the power end of the control module.
8. LED drive circuit according to claim 4 or 5, which is characterized in that including secondary control module, the control
The output end of module is also connect with the first input end of the secondary control module, the second input terminal of the secondary control module
For connecting the 4th power supply, the output end of the secondary control module is connect with the second input terminal of the boosting Voltage stabilizing module.
9. LED drive circuit according to claim 8, which is characterized in that further include second switch module, described second opens
The control terminal for closing module is connect with the output end of the secondary control module, and the first end of the second switch module is for connecting
The cathode of the LED light, the second end of the switch module are connect with the first end of the constant-current driven module.
10. a kind of headlamp characterized by comprising LED light and the driving electricity of the LED as described in claim any one of 1-9
Road, the first input end of the boosting Voltage stabilizing module is for connecting power supply, the output end and the LED of the boosting Voltage stabilizing module
The anode of lamp connects, and the cathode of the LED light is connect with the first end of the constant-current driven module, the constant-current driven module
Second end is for connecting second source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920213968.0U CN209731659U (en) | 2019-02-20 | 2019-02-20 | LED drive circuit and headlamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920213968.0U CN209731659U (en) | 2019-02-20 | 2019-02-20 | LED drive circuit and headlamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209731659U true CN209731659U (en) | 2019-12-03 |
Family
ID=68683358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920213968.0U Expired - Fee Related CN209731659U (en) | 2019-02-20 | 2019-02-20 | LED drive circuit and headlamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209731659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
-
2019
- 2019-02-20 CN CN201920213968.0U patent/CN209731659U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640461A (en) * | 2019-02-20 | 2019-04-16 | 广东励晶智能照明有限公司 | LED drive circuit and headlamp |
| CN109640461B (en) * | 2019-02-20 | 2024-04-23 | 广东励晶智能照明有限公司 | LED driving circuit and lighting lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105101543B (en) | Led drive circuit | |
| CN105764185B (en) | Exchange driving mixing light adjusting circuit and television set | |
| CN103442501B (en) | Forced constant flow source dimming LED (Light Emitting Diode) lamp | |
| CN110519879A (en) | LED drive power based on the toning of 2.4G remote control light modulating | |
| CN206674250U (en) | A kind of controllable silicon light modulation linear constant current circuit | |
| CN105935006B (en) | A kind of LED drive circuit of compatible silicon controlled light modulator | |
| CN107094337B (en) | Light-operated wide voltage LED lamp drive circuit | |
| CN203827566U (en) | Light-and-color-adjustable LED lamp | |
| CN206077758U (en) | A kind of intelligent LED lamp | |
| CN208317065U (en) | LED drive power based on the toning of 2.4G remote control light modulating | |
| CN108696967A (en) | A kind of light modulation toning driving circuit of LED light | |
| CN104053282B (en) | A kind of mixed color LED illuminator and drive circuit thereof | |
| CN209731659U (en) | LED drive circuit and headlamp | |
| CN204191008U (en) | A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power | |
| WO2023185426A1 (en) | Led driving circuit | |
| WO2023207372A1 (en) | Modular led driving circuit | |
| CN205961500U (en) | LED device that constant voltage power supply , intelligence can be adjusted luminance and mixed colours | |
| CN208337946U (en) | A kind of light modulation toning driving circuit of LED light | |
| CN208337952U (en) | A kind of linear constant current LED lamp circuit of intelligent control tunable optical | |
| CN218217734U (en) | Application circuit of two-way intelligent fan lamp | |
| CN205883641U (en) | Linear constant current circuit who adjusted luminance in full stroke phase cut angle based on triac dimmer | |
| CN109640461A (en) | LED drive circuit and headlamp | |
| CN209571032U (en) | A kind of light alarm | |
| CN207783224U (en) | Intelligent power, Intelligent illumination device and intelligent illuminating system | |
| CN207053836U (en) | A kind of LED high-voltage driving circuit with dimming function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |