CN104853467A - Light emitting diode driving device - Google Patents
Light emitting diode driving device Download PDFInfo
- Publication number
- CN104853467A CN104853467A CN201410051134.6A CN201410051134A CN104853467A CN 104853467 A CN104853467 A CN 104853467A CN 201410051134 A CN201410051134 A CN 201410051134A CN 104853467 A CN104853467 A CN 104853467A
- Authority
- CN
- China
- Prior art keywords
- voltage
- emitting diode
- electrical connection
- light
- side winding
- 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.)
- Pending
Links
Landscapes
- Led Devices (AREA)
Abstract
A light emitting diode driving device is suitable for a plurality of light emitting diodes and comprises the components of an AC-DC conversion module which receives an AC voltage and converts the AC voltage to a DC voltage; a transformer which comprises a primary-side winding for receiving the DC voltage, a first secondary-side winding, and a second secondary-side winding, the first secondary-side winding and the second second-side winding respectively generate a first induction voltage and a second induction voltage which are proportional to the DC voltage according to the turn ratios; a first energy storage circuit which receives the first induction voltage and generates a first energy storage voltage that is proportional to the first induction voltage; a boost circuit which receives the first energy storage voltage and boosts the first energy storage voltage for generating a boost voltage; and a second energy storage circuit which receives the second induction voltage and generates a second energy storage voltage that is proportional to the second induction voltage, and furthermore adds the second energy storage voltage with the boost voltage for obtaining a driving voltage which is supplied to each light emitting diode.
Description
Technical field
The present invention relates to a kind of drive unit, particularly relate to a kind of drive unit of light-emitting diode.
Background technology
Along with light-emitting diode (Light Emitting Diode, LED) there is many multiple advantages being better than conventional light source, such as: efficiency is high, the life-span is long, not cracky, reaction speed is fast, reliability is high, therefore the application of light-emitting diode is more and more extensive, and light-emitting diode is in use, generally receive an input voltage by a light emitting diode drive device, then drive light-emitting diode start.This light emitting diode drive device comprises a booster circuit, and a control circuit.This booster circuit receives this input voltage and for converting this input voltage to an output voltage needed for described light-emitting diode and sending each light-emitting diode to, this control circuit is for regulating the electric current of each light-emitting diode and reaching balance.
But this booster circuit existing must consider two problems in design:
Problem one: because considering the consume that this booster circuit produces when changing, then this booster circuit need provide the boost in voltage ratio higher than demand, but Chang Yin is limited to the restriction of physics step-up ratio, cannot provide enough large boost in voltage ratio.
Problem two: when starting multiple light-emitting diode start, need in this booster circuit to use the tolerant element of larger heat, thus element cost, size improve.
Summary of the invention
The object of the present invention is to provide a kind of drive unit of the light-emitting diode solved the problem.
The drive unit of light-emitting diode of the present invention, be applicable to power supply to drive several light-emitting diode, each light-emitting diode has an anode, and a negative electrode, it is characterized in that: this light emitting diode drive device comprises:
One AC/DC modular converter, receives an alternating voltage, and converts this alternating voltage to a direct voltage;
One transformer, comprise this AC/DC modular converter of an electrical connection to receive first side winding, one first secondary side winding of this direct voltage, and one second secondary side winding, this first secondary side winding produces the first induced voltage of this direct voltage of direct ratio according to a turn ratio, this second secondary side winding produces the second induced voltage of this direct voltage of direct ratio according to a turn ratio, this first, second secondary side winding has a first end respectively, and one second end, and the second end ground connection of this first secondary side winding;
One first accumulator, is electrically connected this first secondary side winding, receives the first tank voltage that this first induced voltage also produces this first induced voltage of a direct ratio according to this, and comprises the first output of this first tank voltage of an output;
One booster circuit, is electrically connected this first accumulator, receives this first tank voltage, and this first tank voltage is carried out boosting to produce a booster voltage;
One second accumulator, comprise the second output of the anode of the described light-emitting diode of an electrical connection, and this second accumulator is electrically connected this second secondary side winding to receive this second induced voltage and to produce the second tank voltage of this second induced voltage of a direct ratio, be electrically connected this booster circuit to receive this booster voltage, and this second tank voltage is added booster voltage is to obtain a driving voltage, is supplied to the anode of each light-emitting diode from this second output.
Beneficial effect of the present invention is: this first induced voltage provided by this transformer and this second induced voltage, significantly reduces the boost in voltage ratio that this booster circuit need provide, and also alleviates the heat energy tolerance that in this booster circuit, element need bear.
Accompanying drawing explanation
Fig. 1 is a circuit diagram, illustrates that a preferred embodiment of the drive unit of light-emitting diode of the present invention is the state of conducting in a diverter switch; And
Fig. 2 is a circuit diagram, illustrates that this preferred embodiment is the state of not conducting in this diverter switch.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Consult Fig. 1 and Fig. 2, one preferred embodiment of light emitting diode drive device of the present invention is applicable to power supply to drive several light-emitting diode (Light Emitting Diode, LED) 100, for convenience of description, explain with three light-emitting diodes 100, but not as limit.Each light-emitting diode 100 has an anode, and a negative electrode, and this light emitting diode drive device comprises AC/DC modular converter 1, transformer 2,1 first accumulator 3, booster circuit 4,1 second accumulator 5, and a control module 6.
This AC/DC modular converter 1 is electrically connected an AC power 200, for receiving the alternating voltage V that this AC power 200 exports
aC, and by this alternating voltage V
aCconvert a direct voltage V to
iN, and this AC/DC modular converter 1 comprises this AC power 200 of an electrical connection and for reducing this alternating voltage V
aCthe filter circuit 11 of electromagnetic interference, and this filter circuit 11 of electrical connection and for by this alternating voltage V
aCconvert this direct voltage V to
iNrectification circuit 12.
This transformer 2 comprises first side winding 21,1 first secondary side winding 22, and one second secondary side winding 23.This first side winding 21, this first, second secondary side winding 22,23 have a first end respectively, and one second end.The first end of this first side winding 21 and the second end are electrically connected this rectification circuit 12 respectively to receive this direct voltage V
iN, and this first secondary side winding 22 produces this direct voltage of direct ratio V according to a turn ratio
iNthe first induced voltage V
nS1; This second secondary side winding 23 produces this direct voltage of direct ratio V according to a turn ratio
iNthe second induced voltage V
nS2, and the second end ground connection of this first secondary side winding 22.The number of turn of this first, second secondary side winding 22,23 is respectively N
s1, N
s2.
This first accumulator 3 is electrically connected this first secondary side winding 22, receives this first induced voltage V
nS1and produce this first induced voltage of direct ratio V according to this
nS1the first tank voltage V
1, and comprise one first diode D
1, one first electric capacity C
1, and one first output 31.This first diode D
1there is the anode of the first end of this first secondary side winding 22 of an electrical connection, and the negative electrode of this first output 31 of electrical connection.This first electric capacity C
1there is the first end of this first output 31 of an electrical connection, and the second end of the second end of this first secondary side winding 22 of electrical connection, and this first electric capacity C
1cross-pressure be this first tank voltage V
1, then this first output 31 exports this first tank voltage V
1.
This booster circuit 4 is electrically connected this first accumulator 3, receives this first tank voltage V
1, and by this first tank voltage V
1carry out boosting to produce a booster voltage V
x, and comprise one first inductance L
1, a first transistor Q
1, one the 3rd diode D
3, and one the 3rd electric capacity C
3.This first inductance L
1there is the first end of this first output 31 of an electrical connection, and one second end.This first transistor Q
1there is this first inductance L of an electrical connection
1the first end of the second end, the second end of a ground connection, an and control end, and this control end is controlled makes this first transistor Q
1switch between conducting and not conducting.This first transistor Q
1be a N-type power semiconductor transistor, and this first end be drain, the second end is source electrode, control end is gate.3rd diode D
3there is this first inductance L of an electrical connection
1the anode of the second end, and the negative electrode of the second end of this second secondary side winding 23 of electrical connection.3rd electric capacity C
3there is an electrical connection the 3rd diode D
3the first end of negative electrode, and the second end of a ground connection.This booster circuit 4 is from this first inductance L
1first end receive this first tank voltage V
1boost, and at the 3rd electric capacity C
3cross-pressure be this booster voltage V
x.
This second accumulator 5 is electrically connected this second secondary side winding 23 to receive this second induced voltage V
nS2and produce this second induced voltage of direct ratio V
nS2the second tank voltage V
2, be electrically connected this booster circuit 4 to receive this booster voltage V
x, and by this second tank voltage V
2add this booster voltage V
xto obtain a driving voltage V
o, and comprise one second diode D
2, one second electric capacity C
2, and one second output 51.This second diode D
2there is the anode of the first end of this second secondary side winding 23 of an electrical connection, and the negative electrode of this second output 51 of electrical connection.This second electric capacity C
2there is the first end of this second output 51 of an electrical connection, and electrical connection a 3rd electric capacity C
3the second end of first end, and this second electric capacity C
2cross-pressure be this second tank voltage V
2.This second output 51 is electrically connected the anode of described light-emitting diode 100 and exports this driving voltage V
oto described light-emitting diode 100.
This control module 6 comprises current balance circuit 61, protective circuit 62, and a logic drive circuit 63.
This current balance circuit 61 is electrically connected the negative electrode of each light-emitting diode 100 with the size of current of control flow check through each light-emitting diode 100, and have several current source 611, one and logic lock 612, switch interrupteur SW, an and setting resistance R
set.The number of described current source 611 is identical with the number of described light-emitting diode 100, and each current source 611 has the first end of the negative electrode of the corresponding light-emitting diode of an electrical connection 100, the second end of a controlling electricity, and the 3rd end of a ground connection.This and logic lock 612 have the input that the two light modulation signal DIM and receiving the brightness of an adjustment described light-emitting diode 100 respectively drive the driving signal ON/OFF of described light-emitting diode 100, and an output, this light modulation signal DIM and this driving signal ON/OFF is carried out and produces a control signal after logical operation being exported by this output.This diverter switch SW has a reception one reference voltage V
reffirst end, and second end of the second end of each current source 611 of electrical connection, and the output of an electrical connection this and logic lock 612 is to receive the control end 613 of this control signal, and be controlled between conducting and not conducting by this control signal and switch.This setting resistance R
setthere is the first end of the first end of this diverter switch SW of electrical connection, and the second end of a ground connection, when this diverter switch SW conducting, produce the setting electric current I that flows to the second end of described current source 611
set, for controlling the size of current of described current source 611.
This protective circuit 62 is electrically connected the negative electrode of each light-emitting diode 100 to detect the voltage of the negative electrode of each light-emitting diode 100, and whether provides micro-electric current I according to the voltage swing of the negative electrode of described light-emitting diode 100 with decision
lkcontrol described light-emitting diode 100 slightly luminous, and there is comparator 621, divider 622, inverted logic lock 623, a 1 first resistance R
1, and one second resistance R
2.This comparator 621 has an input one setting voltage V
setnon-inverting input, several inverting input being electrically connected the negative electrode of described light-emitting diode 100 respectively, an and output.This divider 622 has drive end, this setting resistance of electrical connection R of the output of this comparator 621 of an electrical connection
setthe input of first end, and the output that is electrically connected the second end of described current source 611 respectively, to export micro-electric current I
lkcontrol described light-emitting diode 100 slightly luminous.This inverted logic lock 623 has an electrical connection this and logic lock 612 output to receive the input of this control signal, and one electrical connection this comparator 621 output, this control signal is carried out anti-phase rear generation one inversion signal to export from the output of this inverted logic lock 623, to control activation or the forbidden energy of this comparator 621.This first resistance R
1with this second resistance R
2connect between a power supply V and ground holds, and this first resistance R
1with this second resistance R
2have a common end 624, in this example, this power supply V is this first tank voltage V
1.The non-inverting input of this comparator 621 is electrically connected this first resistance R
1with this second resistance R
2common end 624, then by adjusting this first, second resistance R
1, R
2resistance, input this setting voltage V of the non-inverting input of this comparator 621 with modulation
set.
This logic drive circuit 63 is electrically connected output and this first transistor Q of this and logic lock 612
1control end between, then should and logic lock 612 export control signal can reach this first transistor Q via this logic drive circuit 63
1, to control this first transistor Q
1switch between conducting and not conducting.
When operating, drive the driving voltage V of described light-emitting diode 100
o, namely equal this booster voltage V
xadd this second tank voltage V
2, then reduce the boost in voltage ratio that this booster circuit 4 need provide, and the protective circuit 62 of this control module 6 detects the voltage of the negative electrode of each light-emitting diode 100, and whether provides micro-electric current I according to the voltage swing of the negative electrode of described light-emitting diode 100 with decision
lkcontrol described light-emitting diode 100 slightly luminous, to consume the energy that this second secondary side winding 23 produces, protect this current balance circuit 61 and described light-emitting diode 100.Light emitting diode drive device of the present invention how start is below described.
State one:
Consult Fig. 1, when this light modulation signal DIM and this driving signal ON/OFF be all 1 input to this and logic lock 612 time, should and logic lock 612 computing after the control signal that exports be 1, then this control signal drives the first transistor Q of this booster circuit 4
1conducting, and the state controlling that this diverter switch SW is conducting, but the inversion signal that this control signal exports after this inverted logic lock 623 is 0, makes this comparator 621 not start, therefore this protective circuit 62 also not start.This first side winding 21 receives this direct voltage V
iN, make this first, second secondary side winding 22,23 produce this first, second induced voltage V respectively according to turn ratio that is respective and this first side winding 21
nS1, V
nS2, and this first, second accumulator 3,5 receives this first, second induced voltage V respectively
nS1, V
nS2, and produce this first, second tank voltage V respectively
1, V
2.
This booster circuit 4 receives this first tank voltage V
1, and according to this first transistor Q
1turn-on cycle D, this booster voltage V of generation
xas follows:
V
x=V
1*(1/(1-D))…………(1)
Parameter D is this first transistor Q
1turn-on cycle.
Then this driving voltage V
oequal from this second electric capacity C
2the second termination receive this booster voltage V
x, add this second electric capacity C
2second tank voltage V of cross-pressure own
2, then power to described light-emitting diode 100 from this second output 51, this driving voltage V
oas follows:
V
o=V
x+V
2=V
1*((1/(1-D))+(N
s2/N
s1))………(2)
Learnt by formula (2), this driving voltage V
oby cumulative this booster voltage V
xand this second tank voltage V
2and obtain, this first transistor Q can be reduced
1turn-on cycle D, thus share the boosting ratio born needed for this booster circuit 4.
Described light-emitting diode 100 receives this driving voltage V respectively
oand luminous, this diverter switch SW is conducting state again, then the luminosity of described light-emitting diode 100 can via this setting resistance of adjustment R
set, change this setting electric current I
setsize, to control the size of current of described current source 611.
State two:
Consult Fig. 2, when this light modulation signal DIM and this driving signal ON/OFF all without signal or only have wherein one be 1 input to this and logic lock 612 time, should and logic lock 612 computing after the control signal that exports be 0, then cannot drive the first transistor Q of this booster circuit 4
1, this first transistor Q
1for not conducting; and control the state that this diverter switch SW is not conducting; and the inversion signal that the control signal that this and logic lock 612 export exports through this inverted logic lock 623 is 1; start is started to drive this comparator 621; this comparator 621 starts the voltage of the negative electrode detecting described light-emitting diode 100, and therefore this protective circuit 62 starts start.With state one, this first side winding 21 receives this direct voltage V
iN, make this first, second secondary side winding 22,23 produce this first, second induced voltage V respectively according to turn ratio that is respective and this first side winding 21
nS1, V
nS2, and this first, second accumulator 3,5 receives this first, second induced voltage V respectively
nS1, V
nS2, and produce this first, second tank voltage V respectively
1, V
2.Because of this first transistor Q
1not conducting, the booster voltage V that this booster circuit 4 produces
xsize equal this first tank voltage V
1size.
In actual applications, this first tank voltage V
1except power supply is to described light-emitting diode 100, also can power to the use of other circuit (not shown), therefore, this first induced voltage V that this first secondary side winding 22 produces
nS1very fast is just consumed, and this second induced voltage V that this second secondary side winding 23 produces
nS2but be not consumed, then cause this second tank voltage V
2be greater than predetermined value originally, as follows:
V
2>V
1*(N
s2/N
s1)………(3)
This excessive second tank voltage V
2cause the voltage of the negative electrode of described light-emitting diode 100 excessive, be thus easy to destroy this current balance circuit 61 and described light-emitting diode 100.Therefore, the voltage of the negative electrode of described light-emitting diode 100 detected by this comparator 621 of this state-driven, when the voltage of the negative electrode of each light-emitting diode 100 is greater than the setting voltage V inputing to this comparator 621 non-inverting input
settime, the signal that the output of this comparator 621 exports is 1, and drive this divider 622 to start start, this divider 622 makes this setting electric current I
setflow into from this input, then flow out this micro-electric current I by this output
lkto the second end of described current source 611, this micro-electric current I
lksize be I
set/ X, controls described light-emitting diode 100 slightly luminous with consumed energy, it is noted that the parameter X that can control this divider 622 makes light-emitting diode 100 slightly luminous, but the naked eyes of human body not easily find, and in this example, setup parameter X is 100.So, this protective circuit 62 just can consume this second induced voltage V
nS2, protect this current balance circuit 61 and described light-emitting diode 100.
In sum, above-described embodiment has the following advantages:
1. because of this first tank voltage V
1be supplied to this booster circuit 4 and convert this booster voltage V to
x, then the driving voltage V of described light-emitting diode 100 is supplied to
ocan by this booster voltage V
xadd this second tank voltage V
2obtain, then significantly reduce the boost in voltage ratio that this booster circuit 4 need provide, even if consider the consume that this booster circuit 4 produces, this driving voltage V
oalso reach in the easy physics boosting ratio limited at this booster circuit 4.
2. the boost in voltage ratio that need provide because of this booster circuit 4 reduces, and alleviates the heat energy tolerance that in this booster circuit 4, element need bear, then allows the cost of assembly, size reduce and just can reach compared to the same effect of existing booster circuit.
So the design of light emitting diode drive device of the present invention can solve the problem of prior art, the effect also reach minification, reducing costs.
Claims (8)
1. a light emitting diode drive device, be applicable to power supply to drive several light-emitting diode, each light-emitting diode has an anode, and a negative electrode, it is characterized in that: this light emitting diode drive device comprises:
One AC/DC modular converter, receives an alternating voltage, and converts this alternating voltage to a direct voltage;
One transformer, comprise this AC/DC modular converter of an electrical connection to receive first side winding, one first secondary side winding of this direct voltage, and one second secondary side winding, this first secondary side winding produces the first induced voltage of this direct voltage of direct ratio according to a turn ratio, this second secondary side winding produces the second induced voltage of this direct voltage of direct ratio according to a turn ratio, this first, second secondary side winding has a first end respectively, and one second end, and the second end ground connection of this first secondary side winding;
One first accumulator, is electrically connected this first secondary side winding, receives the first tank voltage that this first induced voltage also produces this first induced voltage of a direct ratio according to this, and comprises the first output of this first tank voltage of an output;
One booster circuit, is electrically connected this first accumulator, receives this first tank voltage, and this first tank voltage is carried out boosting to produce a booster voltage;
One second accumulator, comprise the second output of the anode of the described light-emitting diode of an electrical connection, and this second accumulator is electrically connected this second secondary side winding to receive this second induced voltage and to produce the second tank voltage of this second induced voltage of a direct ratio, be electrically connected this booster circuit to receive this booster voltage, and this second tank voltage is added booster voltage is to obtain a driving voltage, is supplied to the anode of each light-emitting diode from this second output.
2. light emitting diode drive device according to claim 1, is characterized in that: this first accumulator comprises:
One first diode, has the anode of the first end of this first secondary side winding of an electrical connection, and the negative electrode of this first output of electrical connection; And
One first electric capacity, has the first end of this first output of an electrical connection, and the second end of the second end of this first secondary side winding of electrical connection, and the cross-pressure of this first electric capacity is this first tank voltage.
3. light emitting diode drive device according to claim 2, is characterized in that:
This booster circuit comprises:
One first inductance, has the first end of this first output of an electrical connection, and one second end;
One the first transistor, has the first end of the second end of this first inductance of an electrical connection, the second end of a ground connection, and a control end, and controlled this first transistor that makes of this control end switches between conducting and not conducting;
One the 3rd diode, has the anode of the second end of this first inductance of an electrical connection, and the negative electrode of the second end of this second secondary side winding of electrical connection; And
One the 3rd electric capacity, has the first end of the negative electrode of an electrical connection the 3rd diode, and the second end of a ground connection.
4. light emitting diode drive device according to claim 3, is characterized in that: this second accumulator comprises:
One second diode, has the anode of the first end of this second secondary side winding of an electrical connection, and the negative electrode of this second output of electrical connection; And
One second electric capacity, has the first end of this second output of an electrical connection, and the second end of the first end of electrical connection the 3rd electric capacity, and the cross-pressure of this second electric capacity is this second tank voltage.
5. light emitting diode drive device according to claim 4, is characterized in that: this driving voltage is as follows:
V
o=V
1*((1/(1-D))+(N
s2/N
s1))
Parameter V
ofor this driving voltage, parameter V
1for this first tank voltage, parameter D is the turn-on cycle of this first transistor, Parameter N
s2for the number of turn of this second secondary side winding, Parameter N
s1for the number of turn of this first secondary side winding.
6. light emitting diode drive device according to claim 4, is characterized in that: this light emitting diode drive device also comprises:
One control module, comprising:
One current balance circuit, is electrically connected the negative electrode of each light-emitting diode with the size of current of control flow check through each light-emitting diode;
Whether one protective circuit, is electrically connected the negative electrode of each light-emitting diode to detect the voltage of the negative electrode of each light-emitting diode, and provide light-emitting diode described in micro-Current Control slightly luminous according to the voltage swing of the negative electrode of described light-emitting diode with decision.
7. light emitting diode drive device according to claim 6, is characterized in that: this current balance circuit has:
Several current source, each current source has the first end of the negative electrode of the corresponding light-emitting diode of an electrical connection, the second end of a controlling electricity, and the 3rd end of a ground connection;
One and logic lock, have two and receive the input that a light modulation signal and drives signal respectively, and an output, this light modulation signal and this driving signal are carried out and produce a control signal after logical operation being exported by its output;
One diverter switch, there is the first end of reception one reference voltage, and second end of the second end of each current source of electrical connection, and the output of an electrical connection this and logic lock is to receive the control end of this control signal, and is controlled between conducting and not conducting by this control signal and switches; And
One setting resistance, has the first end of the first end of this diverter switch of electrical connection, and the second end of a ground connection, produces the setting electric current that flows to the second end of described current source, for controlling the size of current of described current source when this diverter switch conducting.
8. light emitting diode drive device according to claim 6, is characterized in that: this protective circuit has:
One comparator, has the non-inverting input of input one setting voltage, several inverting input being electrically connected the negative electrode of described light-emitting diode respectively, and an output;
One divider, has the input of the drive end of this comparator output terminal of electrical connection, this setting resistance first end of electrical connection, and the output that is electrically connected the second end of described current source respectively, slightly luminous to export light-emitting diode described in micro-Current Control; And
One inverted logic lock, there is an electrical connection this and logic lock output to receive the input of this control signal, and one electrical connection this comparator output, this control signal is carried out anti-phase rear generation one inversion signal to export from the output of this inverted logic lock, to control activation or the forbidden energy of this comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410051134.6A CN104853467A (en) | 2014-02-13 | 2014-02-13 | Light emitting diode driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410051134.6A CN104853467A (en) | 2014-02-13 | 2014-02-13 | Light emitting diode driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104853467A true CN104853467A (en) | 2015-08-19 |
Family
ID=53852730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410051134.6A Pending CN104853467A (en) | 2014-02-13 | 2014-02-13 | Light emitting diode driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104853467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106612579A (en) * | 2015-10-21 | 2017-05-03 | 晶豪科技股份有限公司 | A light emitting diode driving module and a light emitting diode module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069339A (en) * | 2004-12-03 | 2007-11-07 | 罗姆股份有限公司 | Power supply device, light emitting device using such power supply device, and electronic device |
| US20080129225A1 (en) * | 2004-12-03 | 2008-06-05 | Isao Yamamoto | Power Supply Device, Light Emitting Device Using Such Power Supply Device, And Electronic Device |
| CN102065598A (en) * | 2009-11-12 | 2011-05-18 | 泰金宝电通股份有限公司 | Lighting device, driving circuit of light-emitting diode and driving method thereof |
| TW201342990A (en) * | 2012-04-11 | 2013-10-16 | Tpv Electronics Fujian Co Ltd | Light-emitting diode driving circuit |
-
2014
- 2014-02-13 CN CN201410051134.6A patent/CN104853467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069339A (en) * | 2004-12-03 | 2007-11-07 | 罗姆股份有限公司 | Power supply device, light emitting device using such power supply device, and electronic device |
| US20080129225A1 (en) * | 2004-12-03 | 2008-06-05 | Isao Yamamoto | Power Supply Device, Light Emitting Device Using Such Power Supply Device, And Electronic Device |
| CN102065598A (en) * | 2009-11-12 | 2011-05-18 | 泰金宝电通股份有限公司 | Lighting device, driving circuit of light-emitting diode and driving method thereof |
| TW201342990A (en) * | 2012-04-11 | 2013-10-16 | Tpv Electronics Fujian Co Ltd | Light-emitting diode driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106612579A (en) * | 2015-10-21 | 2017-05-03 | 晶豪科技股份有限公司 | A light emitting diode driving module and a light emitting diode module |
| CN106612579B (en) * | 2015-10-21 | 2018-12-07 | 晶豪科技股份有限公司 | LED driving module and light-emitting diode (LED) module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9924569B2 (en) | LED driving circuit | |
| US9408265B2 (en) | Multichannel constant current LED driving circuit, driving method and LED driving power | |
| US8749174B2 (en) | Load current management circuit | |
| US8194417B2 (en) | Two-stage switching power supply | |
| CN102832836B (en) | Cascade boost and inverting buck converter with independent control | |
| US20110266969A1 (en) | Dimmable LED Power Supply with Power Factor Control | |
| JP5761301B2 (en) | Lighting device and lighting apparatus | |
| CN106575918B (en) | The floating output voltage voltage boosting-reducing adjuster using buck controller with low input and output ripple and low | |
| US10051704B2 (en) | LED dimmer circuit and method | |
| EP3099139B1 (en) | Efficient lighting circuit for led assemblies | |
| CN104813742A (en) | Supply voltage management | |
| TW201640954A (en) | Driving circuit of light-emitting diodes | |
| US9288855B2 (en) | Driving circuit for driving LED load | |
| CN102595744A (en) | Light emitting diode emitting device | |
| Lu et al. | High efficiency adaptive boost converter for LED drivers | |
| US20160087535A1 (en) | Self-excited power conversion circuit for secondary side control output power | |
| KR20120114998A (en) | Led driver for improving power factor | |
| Dong et al. | Basic circuit theoretic considerations of LED driving: Voltage-source versus current-source driving | |
| US20120163034A1 (en) | Switching mode power supply having multiple output | |
| EP2475086B1 (en) | Power supply device, for example for light sources | |
| US10539944B2 (en) | Programmable logic controller | |
| CN104853467A (en) | Light emitting diode driving device | |
| US9960636B2 (en) | Power supply system and direct-current converter thereof | |
| KR20110139553A (en) | Power factor correction circuit for lighting and driving method thereof | |
| TW201223316A (en) | Power converting controller and LED diving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |
|
| WD01 | Invention patent application deemed withdrawn after publication |