CN205491350U - Four ways LED lamp drive arrangement that flow equalizes - Google Patents
Four ways LED lamp drive arrangement that flow equalizes Download PDFInfo
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- CN205491350U CN205491350U CN201620271316.9U CN201620271316U CN205491350U CN 205491350 U CN205491350 U CN 205491350U CN 201620271316 U CN201620271316 U CN 201620271316U CN 205491350 U CN205491350 U CN 205491350U
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Abstract
The utility model discloses a four ways LED lamp drive arrangement that flow equalizes, it includes resonance electrical source controller, switch module, transformer, the module of flow equalizing and four ways LED banks, and resonance electrical source controller's output is connected with the input of switch module, and the output of switch module is connected with the primary winding of transformer, and the secondary's of transformer both ends are connected with the LED banks of two liang of series connection of multichannel respectively after the module of flow equalizing, drive signal to the switch module of the specific duty cycle of resonance electrical source controller output, the switch element of switch module switches on or closes according to drive signal to form on the primary winding of transformer and exchanges square signal, exchanges square signal and steps down or step up through the transformer and handle the back, exports the module of flow equalizing to by the secondary of transformer, and the DC signal that exports the same current value after the module of flow equalizing is flow equalized and is handled is each LED banks extremely, the drive thereby realization four ways LED banks flow equalizes has improved the electrical energy conversion efficiency among the LED lamp driving process.
Description
Technical field
This utility model relates to LED technology field, particularly to a kind of four paths of LEDs lamp current-sharing driving means.
Background technology
At present, owing to the energy consumption of LED is low, LED is widely used in the backlight of various display device and shines
Bright.In back lighting is applied, generally use constant-current driving LED lamp, the bright of display device could be met
Degree, colourity and uniformity requirement.
Generally, the power supply of other functional modules of LED constant-current driving and display device is by two independences
Power supply provide.The constant-current driving of LED typically uses the direct voltage component isolating Switching Power Supply
After, obtain suitable voltage signal to drive the mode of LED through boosting or blood pressure lowering；Or use straight
Connect and isolate the appropriate DC voltages signal of Switching Power Supply and directly drive the mode of LED.Above two side
Formula is both needed to obtain suitable d. c. voltage signal, therefore from the primary side of power supply through the Power convert of two-stage
Energy conversion efficiency is low.
Utility model content
Main purpose of the present utility model is to propose a kind of four paths of LEDs lamp current-sharing driving means, it is intended to improve
The conversion efficiency of electric energy during LED driving.
For achieving the above object, the four paths of LEDs lamp current-sharing driving means that the utility model proposes, it includes
Resonant power controller, switch module, transformator, current-sharing module and four paths of LEDs lamp groups, described humorous
The outfan of power-supply controller of electric that shakes is connected with the input of described switch module, the output of described switch module
End is connected with the armature winding of transformator；Described current-sharing module includes resonant capacitance and halfwave rectifier filtering
Unit, one end of described resonant capacitance is connected with one end of the secondary windings of described transformator, described resonance
The other end of electric capacity is connected with one end of two brachium pontis of described halfwave rectifier filter unit, described halfwave rectifier
The other end of two brachium pontis of filter unit is connected with the other end of the secondary windings of described transformator；Four tunnel institutes
Stating LED group to connect two-by-two, it is single that the described LED group of series connection is connected to the filtering of described halfwave rectifier
On the brachium pontis of unit；Described resonant power controller output particular duty cycle driving signal to switch module,
The switch element of described switch module is according to driving signal conduction or closing the armature winding at described transformator
Upper formation ac square wave signal, described ac square wave signal is after transformer pressure-reducing or boosting process, by institute
The secondary windings stating transformator exports to current-sharing module, and described current-sharing module current-sharing exports identical electricity after processing
The direct current signal of flow valuve is to each LED group.
Preferably, described halfwave rectifier filter unit include the first diode, the second diode, the three or two
Pole pipe, the 4th diode, the first electric capacity and the second electric capacity, the anode of described first diode, the two or two
The negative electrode of pole pipe is connected with described resonant capacitance, the negative electrode of described first diode through described first electric capacity with
The anode of described 3rd diode connects, the negative electrode of described 3rd diode, the 4th diode anode with
One end of the secondary windings of described transformator connects, and the negative electrode of described 4th diode is through described second electric capacity
It is connected with the anode of described second diode.
Preferably, LED group described in four tunnels include the first LED group, the second LED group, the 3rd
LED group and the 4th LED group, described first LED group connects with the second LED group, institute
The negative electrode of the anode tap and described first diode of stating the first LED group is connected, described first LED group
Cathode terminal and the second LED group anode tap connect and ground connection, the cathode terminal of described second LED group
It is connected with the anode of described 3rd diode；Described 3rd LED group is connected with the 4th LED group, institute
The negative electrode of the anode tap and described 4th diode of stating the 3rd LED group is connected, described 3rd LED group
Cathode terminal and the 4th LED group anode tap connect and ground connection, the cathode terminal of described 4th LED group
It is connected with the anode of described second diode.
Preferably, described switch module includes the first switch element and second switch unit, and described first opens
Pass unit and second switch unit are connected in the primary of described resonant power controller and described transformator in parallel
Between winding, described first switch element turns on second switch unit complementation.
Preferably, this four paths of LEDs lamp current-sharing driving means also includes the current value for detecting LED group
Feedback module, described feedback module is connected to the series connection contact of LED group described in two and described resonance electricity
Between the controller of source.
Preferably, described feedback module includes the first resistance, error amplifier and the optocoupler being connected in series,
Described first resistance is connected between the LED group of arbitrary two series connection, the high level end of described first resistance
It is connected with error amplifier.
Technical solutions of the utility model are according to the driving current value size of LED group, by using resonance electricity
Source controller exports the pulse signal driving the corresponding dutycycle of electric current to LED group.This pulse signal is divided into
The two-way of opposite in phase, exports two switch elements to switch module respectively so that two switch elements are complementary
Conducting, thus on the armature winding of transformator, form ac square wave signal.This ac square wave signal according to
The armature winding of transformator and the turn ratio of secondary windings, thus carry out boosting or blood pressure lowering processes to obtain LED
The corresponding driving voltage of lamp group, is then exported to current-sharing module by the secondary windings of transformator.Transformator
The square-wave signal of secondary windings output to form two-way current value after current-sharing module identical, in opposite direction
Direct current signal, this direct current signal is respectively used to drive the LED group of two-way series connection, due to electricity in series loop
Flow valuve is the most identical, thus, by technique scheme, can be used for driving four paths of LEDs lamp groups, Qie Gai tetra-tunnel
The current value of LED group is the most identical, it is achieved the purpose that four paths of LEDs lamp group current-sharings drive, and improves LED and drives
Energy conversion efficiency during Dong.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that,
Accompanying drawing in describing below is only embodiments more of the present utility model, for ordinary skill people
From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain according to the structure shown in these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the module diagram of this utility model four paths of LEDs lamp current-sharing driving means one embodiment；
Fig. 2 is the circuit structure connection diagram in Fig. 1；
Fig. 3 is the module diagram of this utility model four paths of LEDs lamp current-sharing another embodiment of driving means；
Fig. 4 is the circuit structure connection diagram in Fig. 3.
Drawing reference numeral illustrates:
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings into
One step explanation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is clearly and completely described, it is clear that described embodiment is only of the present utility model one
Section Example rather than whole embodiments.Based on the embodiment in this utility model, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise, broadly falls into
The scope of this utility model protection.
It is to be appreciated that directional instruction in this utility model embodiment (such as upper and lower, left and right,
It is forward and backward ...) it is only used for explanation phase under a certain particular pose (as shown in drawings) between each parts
To position relationship, motion conditions etc., if this particular pose changes, then directionality indicates also
Change the most therewith.
It addition, the description relating to " first ", " second " etc. in this utility model is only used for describing mesh
, and it is not intended that instruction or imply its relative importance or implicit indicate indicated technical characteristic
Quantity.Thus, define " first ", the feature of " second " can be expressed or implicitly include
At least one this feature.It addition, the technical scheme between each embodiment can be combined with each other, but must
Must be based on those of ordinary skill in the art are capable of, when mutual lance occurs in the combination of technical scheme
Shield will be understood that when maybe cannot realize that the combination of this technical scheme does not exists, and does not wants at this utility model
Within the protection domain asked.
The utility model proposes a kind of four paths of LEDs lamp current-sharing driving means.
Referring to figs. 1 through 4, Fig. 1 is the module of this utility model four paths of LEDs lamp current-sharing driving means one embodiment
Schematic diagram；Fig. 2 is the circuit structure connection diagram in Fig. 1；Fig. 3 is that this utility model four paths of LEDs lamp is equal
The module diagram of stream another embodiment of driving means；Fig. 4 is the circuit structure connection diagram in Fig. 3.
In this utility model embodiment, as described in Fig. 1, Fig. 2, this four paths of LEDs lamp current-sharing drives dress
Put and include resonant power controller 10, switch module 20, transformator 30, current-sharing module 40 and four tunnels
The input of LED group 50, the outfan of described resonant power controller 10 and described switch module 20
Connecting, the outfan of described switch module 20 is connected with the armature winding 30a of transformator 30, described change
Connect with multichannel after described current-sharing module 40 respectively two-by-two in the two ends of the secondary windings 30b of depressor 30
Described LED group 50 connects；Described resonant power controller 10 exports the driving signal of particular duty cycle
To switch module 20, the switch element of described switch module 20 is according to driving signal conduction or closing described
Forming ac square wave signal on the armature winding 30a of transformator 30, described ac square wave signal is through transformator
After 30 buck or boosts process, the secondary windings 30b of described transformator 30 export to current-sharing module 40,
Described current-sharing module 40 current-sharing exports the direct current signal of same current value to each LED group 50 after processing.
Technical solutions of the utility model are according to the driving current value size of LED group 50, humorous by using
The power-supply controller of electric 10 that shakes exports the pulse signal driving the corresponding dutycycle of electric current to LED group 50.Should
Pulse signal is divided into the two-way of opposite in phase, exports two switch elements to switch module 20 respectively so that
Two switch element alternate conduction.1 end of the armature winding 30a of transformator 30 and two switch elements connect,
2 ends are through the 3rd electric capacity C4 ground connection, when two switch element alternate conduction, will change armature winding 30a's
The voltage of 1 end, when 1 end is high level, the 3rd electric capacity C4 charging, when 1 end is low level, the
Three electric capacity C4 electric discharges, thus on the armature winding 30a of transformator 30, form ac square wave signal.Should
Ac square wave signal according to the turn ratio of the armature winding 30a and secondary windings 30b of transformator 30, thus
Carry out boosting or blood pressure lowering processes to obtain the corresponding driving voltage of LED group 50, then pass through transformator 30
Secondary windings 30b export to current-sharing module 40.In the present embodiment, current-sharing module 40 has isolation directly
Stream, the effect of rectifying and wave-filtering so that the square-wave signal of the secondary windings 30b output of transformator 30 is through current-sharing
Forming the direct current signal that two-way current value is identical, in opposite direction after module 40, this direct current signal is respectively used to
Drive the LED group 50 of two-way series connection, owing in series loop, current value is the most identical, thus, by upper
State technical scheme, can be used for driving four paths of LEDs lamp groups 50, and the current value of this four paths of LEDs lamp group 50 is equal
Identical, it is achieved the purpose that four paths of LEDs lamp group 50 current-sharings drive.
Specifically, 4 ends of the secondary windings 30b of above-mentioned transformator 30 with 2 ends of armature winding 30a are
Same Name of Ends, then the signal of 4 ends is with 2 end respective change, and the signal of 3 ends is with 1 end respective change；Work as primary
1 end of winding 30a, 2 ends AC signal within a cycle phase place change time, then the 3 of secondary windings
End, the phase place also respective change of signal of 4 ends.
Specifically, described current-sharing module 40 includes resonant capacitance C1 and halfwave rectifier filter unit, institute
One end of one end and the secondary windings 30b of described transformator 30 of stating resonant capacitance C1 is connected, described humorous
The other end of electric capacity C1 that shakes is connected with one end of two brachium pontis of described halfwave rectifier filter unit, described half-wave
The other end of two brachium pontis of rectification filtering unit connects with the other end of the secondary windings 30b of described transformator 30
Connect.
In the present embodiment, the secondary windings 30b of transformator 30 can be filtered out by resonant capacitance C1
Flip-flop in the square-wave signal of output, so that flowing through forward current and the negative current of resonant capacitance C1
Equal in magnitude.Then make after resonant capacitance C1, input two bridges to halfwave rectifier filtration module
The current value of arm is equal in magnitude.
Specifically, described halfwave rectifier filter unit include the first diode D1, the second diode D2,
3rd diode D3, the 4th diode D4, the first electric capacity C2 and the second electric capacity C3, the described 1st
The anode of pole pipe D1, the negative electrode of the second diode D2 are connected with described resonant capacitance C1, and described first
The negative electrode of diode D1 is connected through the anode of described first electric capacity C2 and described 3rd diode D3, institute
State the negative electrode of the 3rd diode D3, the anode of the 4th diode D4 and the secondary of described transformator 30 around
One end of group 30b connects, and the negative electrode of described 4th diode D4 is through described second electric capacity C3 and described the
The anode of two diode D2 connects.
According to Such analysis, the AC signal exported due to the secondary windings 30b of transformator 30 is one
In the individual cycle during phase place change, the forward current flowing through resonant capacitance C1 is equal in magnitude with negative current, i.e.
Current value on first diode D1, the second diode D2 is equal in magnitude, the 3rd diode D3, the 4th
Current value on diode D4 is equal in magnitude.
When the square-wave signal positive half cycle work that the secondary windings 30b of transformator 30 exports, 3 ends are just, 4
End is negative；Now, the first diode D1, the 3rd diode D3 conducting, the second diode D2, the 4th
Diode D4 ends.Thus, 3 ends of the secondary windings 30b of transformator 30, resonant capacitance C1,
One diode D1, the first electric capacity C2, the 3rd diode D3, transformator 30 secondary windings 30b 4
End forms series loop, thus the current value on the first diode D1, the 3rd diode D3 is equal in magnitude.
In like manner, when the square-wave signal of the output of the secondary windings 30b of transformator 30 switches to negative half period work,
3 ends are negative, and 4 ends are just；The square-wave signal of 4 ends of the secondary windings 30b of transformator 30 is in just half
Week；Now, the first diode D1, the 3rd diode D3 cut-off, the second diode D2, the four or two pole
Pipe D4 turns on.Thus, 3 ends of the secondary windings 30b of transformator 30, the 4th diode D4, second
Electric capacity C3, the second diode D2, resonant capacitance C1, the 3 end shapes of secondary windings 30b of transformator 30
Become series loop, thus the current value on the second diode D2, the 4th diode D4 is equal in magnitude.
Owing to secondary windings 30b is when positive and negative half cycle switches, flow through the size of current phase of resonant capacitance C1
Deng, i.e. before and after the switching of secondary windings 30b positive and negative half cycle, the first diode D1, the second diode D2
On current value equal in magnitude, thus, the first diode D1, the second diode D2, the 3rd diode
Current value size on D3, the 4th diode D4 is the most equal.
Specifically, LED group 50 described in four tunnels includes first LED group the 51, second LED group
52, the 3rd LED group 53 and the 4th LED group 54, described first LED group 51 and second
LED group 52 is connected, and the anode tap of described first LED group 51 is with described first diode D1's
Negative electrode connects, and the cathode terminal of described first LED group 51 and the anode tap of the second LED group 52 connect
And ground connection, the cathode terminal of described second LED group 52 is connected with the anode of described 3rd diode D3；
Described 3rd LED group 53 is connected with the 4th LED group 54, the sun of described 3rd LED group 53
Extremely it is connected with the negative electrode of described 4th diode D4, the cathode terminal of described 3rd LED group 53 and
The anode tap of four LED groups 54 connects and ground connection, and the cathode terminal of described 4th LED group 54 is with described
The anode of the second diode D2 connects.
Specifically, in the present embodiment, each LED group 50 is that the LED that some head and the tail are connected is made
LED lamp bar.
When the square-wave signal positive half cycle work that the secondary windings 30b of transformator 30 exports, the first diode
D1, the 3rd diode D3 output electric current through first electric capacity C2 filtering after be the first LED group 51,
Second LED group 52 provides loop current, due to first LED group the 51, second LED group 52
For series relationship, thus flow through the first LED group 51 and the size of current flowing through the second LED group 52
Equal.
When the square-wave signal negative half period work that the secondary windings 30b of transformator 30 exports, the second diode
D2, the 4th diode D4 output electric current through second electric capacity C3 filtering after be the 3rd LED group 53,
4th LED group 54 provides loop current, due to the 3rd LED group the 53, the 4th LED group 54
For series relationship, thus flow through the 3rd LED group 53 and the size of current flowing through the 4th LED group 54
Equal.
According to Such analysis, the first diode D1, the second diode D2, the 3rd diode D3,
Current value size on 4th diode D4 is the most equal, therefore, flows through the first LED group 51, second
The current value size of LED group the 52, the 3rd LED group the 53, the 4th LED group 54 is the most equal,
Achieve current-sharing and drive the purpose of four paths of LEDs lamp groups 50.
Further, by the two LED groups connected indirectly, it is also possible to that reduces in each LED group is absolute
Magnitude of voltage, such as, needs 0～450V voltage to drive before ground connection ,-225～225V voltages equally may be used now
To drive, thus, for device choosings such as the electric capacity in this four paths of LEDs lamp current-sharing driving means, diodes
The high pressure resistant requirement of type reduces, and reduces product cost.
Preferably, switch module 20 includes the first switch element 21 and second switch unit 22, described
One switch element 21 and second switch unit 22 are connected in described resonant power controller 10 in parallel with described
Between the armature winding 30a of transformator 30, described first switch element 21 is handed over second switch unit 22
For conducting.
Specifically, in the present embodiment, the first switch element 21, second switch unit 22 all use enhancing
Type NMOS tube.
Above-mentioned first switch element 21, second switch unit 22 alternate conduction make at the beginning of transformator 30
Ac square wave signal is formed on level winding 30a.
Further, as described in Figure 3, this four paths of LEDs lamp current-sharing driving means is at the base of above-described embodiment
The feedback module 60 of current value for detecting LED group 50, described feedback module is also add on plinth
Between the 60 series connection contacts being connected to LED group 50 described in two and described resonant power controller 10.
The current value of any one paths of LEDs lamp group 50 of being sampled by this feedback module 60, feeds back to resonance electricity
The feedback end of source controller 10, this resonant power, according to the current value size of feedback end, adjusts output then
The dutycycle of pulse signal, it is achieved LED group 50 drive the constant of electric current.
The first resistance R1 that preferably, as described in Figure 4, described feedback module 60 includes being connected in series,
Error amplifier 61 and optocoupler 62, described first resistance R1 is connected to the LED group of arbitrary two series connection
Between 50, the high level end of described first resistance R1 is connected with error amplifier 61.
In the present embodiment, the first resistance R1 is connected between cathode terminal and the ground of the first LED group 51,
I.e. first resistance R1 is connected between the first LED group 51 and the second LED group 52, thus flows through
The current value of first LED group the 51, second LED group 52 and the current value flowing through the first resistance R1
Equal.Due to the first resistance R1 resistance it is known that thus after sampling obtains the magnitude of voltage of the first resistance R1,
Current value on first resistance R1 draws accordingly.By the magnitude of voltage of the first resistance R1 is sampled transmission extremely
After error amplifier 61 is amplified processing, transmit to resonant power control after the isolation by optocoupler 62
The feedback end of device 10, thus can adjust according to the magnitude of voltage size of feedback end by resonant power controller 10
The dutycycle of the pulse signal of output, then adjusts and exports the current value to each LED group 50, reach
The purpose driving electric current of constant LED group 50.
The foregoing is only preferred embodiment of the present utility model, not thereby limit of the present utility model specially
Profit scope, every under inventive concept of the present utility model, in utilizing this utility model description and accompanying drawing
The equivalent structure transformation of Rong Suozuo, or directly/be indirectly used in other relevant technical fields and be included in this
In the scope of patent protection of utility model.
Claims (6)
1. a paths of LEDs lamp current-sharing driving means, it is characterised in that include resonant power controller,
Switch module, transformator, current-sharing module and four paths of LEDs lamp groups, described resonant power controller defeated
Go out end to be connected with the input of described switch module, the outfan of described switch module and the primary of transformator
Winding connects；Described current-sharing module includes resonant capacitance and halfwave rectifier filter unit, described resonance electricity
The one end held is connected with one end of the secondary windings of described transformator, the other end of described resonant capacitance and institute
The one end of two brachium pontis stating halfwave rectifier filter unit connects, two brachium pontis of described halfwave rectifier filter unit
The other end be connected with the other end of the secondary windings of described transformator；Described in four tunnels, LED group is gone here and there two-by-two
Connection, the described LED group of series connection is connected on the brachium pontis of described halfwave rectifier filter unit；
Described resonant power controller output particular duty cycle driving signal to switch module, described switch
The switch element of module is according to driving signal conduction or closing formation friendship on the armature winding of described transformator
Stream square-wave signal, described ac square wave signal is after transformer pressure-reducing or boosting process, by described transformator
Secondary windings output to current-sharing module, described current-sharing module current-sharing exports the straight of same current value after processing
Stream signal is to each LED group.
Four paths of LEDs lamp current-sharing driving means the most as claimed in claim 1, it is characterised in that described
Halfwave rectifier filter unit include the first diode, the second diode, the 3rd diode, the 4th diode,
First electric capacity and the second electric capacity, the anode of described first diode, the second diode negative electrode humorous with described
The electric capacity that shakes connects, and the negative electrode of described first diode is through the sun of described first electric capacity Yu described 3rd diode
Pole connects, the negative electrode of described 3rd diode, the anode of the 4th diode and the secondary of described transformator around
One end of group connects, and the negative electrode of described 4th diode is through described second electric capacity and described second diode
Anode connects.
Four paths of LEDs lamp current-sharing driving means the most as claimed in claim 2, it is characterised in that four tunnels
Described LED group includes the first LED group, the second LED group, the 3rd LED group and
Four LED groups, described first LED group connects with the second LED group, described first LED
The anode tap of group is connected with the negative electrode of described first diode, the cathode terminal of described first LED group and the
The anode tap of two LED groups connects and ground connection, the cathode terminal and the described 3rd of described second LED group
The anode of diode connects；Described 3rd LED group is connected with the 4th LED group, described 3rd LED
The anode tap of lamp group is connected with the negative electrode of described 4th diode, the cathode terminal of described 3rd LED group with
The anode tap of the 4th LED group connects and ground connection, the cathode terminal of described 4th LED group and described the
The anode of two diodes connects.
Four paths of LEDs lamp current-sharing driving means the most as claimed in claim 1, it is characterised in that described
Switch module includes the first switch element and second switch unit, described first switch element and second switch
Unit is connected in parallel between described resonant power controller and the armature winding of described transformator, and described
One switch element turns on second switch unit complementation.
Four paths of LEDs lamp current-sharing driving means the most as claimed in claim 1, it is characterised in that also wrap
Including the feedback module of current value for detecting LED group, described feedback module is connected to LED described in two
Between series connection contact and the described resonant power controller of lamp group.
Four paths of LEDs lamp current-sharing driving means the most as claimed in claim 5, it is characterised in that described
Feedback module includes the first resistance, error amplifier and the optocoupler being connected in series, and described first resistance is even
Being connected between the LED group of arbitrary two series connection, the high level end of described first resistance is with error amplifier even
Connect.
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| CN201620271316.9U CN205491350U (en) | 2016-03-31 | 2016-03-31 | Four ways LED lamp drive arrangement that flow equalizes |
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| CN201620271316.9U CN205491350U (en) | 2016-03-31 | 2016-03-31 | Four ways LED lamp drive arrangement that flow equalizes |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106304492A (en) * | 2016-08-30 | 2017-01-04 | 康佳集团股份有限公司 | A kind of two-way constant-current circuit and supply unit |
| CN106879110A (en) * | 2017-02-20 | 2017-06-20 | 广东工业大学 | A kind of LED drive circuit based on non-bridge PFC |
| CN106879118A (en) * | 2017-03-29 | 2017-06-20 | 华南理工大学 | A kind of condensance balanced type multi-channel LED drive circuit |
| CN106982495A (en) * | 2017-05-15 | 2017-07-25 | 广东工业大学 | A kind of LED drive circuit and LED illumination System |
| WO2018126493A1 (en) * | 2017-01-04 | 2018-07-12 | 深圳市华星光电技术有限公司 | Led backlight driving circuit and liquid crystal display |
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- 2016-03-31 CN CN201620271316.9U patent/CN205491350U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106304492A (en) * | 2016-08-30 | 2017-01-04 | 康佳集团股份有限公司 | A kind of two-way constant-current circuit and supply unit |
| CN106304492B (en) * | 2016-08-30 | 2019-12-10 | 康佳集团股份有限公司 | double-circuit constant current circuit and power supply device |
| WO2018126493A1 (en) * | 2017-01-04 | 2018-07-12 | 深圳市华星光电技术有限公司 | Led backlight driving circuit and liquid crystal display |
| US10448468B2 (en) | 2017-01-04 | 2019-10-15 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | LED backlight driving circuit and liquid crystal display |
| CN106879110A (en) * | 2017-02-20 | 2017-06-20 | 广东工业大学 | A kind of LED drive circuit based on non-bridge PFC |
| CN106879118A (en) * | 2017-03-29 | 2017-06-20 | 华南理工大学 | A kind of condensance balanced type multi-channel LED drive circuit |
| CN106879118B (en) * | 2017-03-29 | 2018-10-09 | 华南理工大学 | A kind of condensance balanced type multi-channel LED driving circuit |
| CN106982495A (en) * | 2017-05-15 | 2017-07-25 | 广东工业大学 | A kind of LED drive circuit and LED illumination System |
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