CN107666742A - LED drive circuit and light fixture - Google Patents
LED drive circuit and light fixture Download PDFInfo
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- CN107666742A CN107666742A CN201710995882.3A CN201710995882A CN107666742A CN 107666742 A CN107666742 A CN 107666742A CN 201710995882 A CN201710995882 A CN 201710995882A CN 107666742 A CN107666742 A CN 107666742A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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Abstract
The invention discloses a kind of LED drive circuit and light fixture, the drive circuit includes：Boosting unit, boosting unit include switching tube, and boosting unit carries out boost conversion to export the second direct current to the first direct current of input, wherein, the voltage of the second direct current is more than the voltage of the first direct current；Control unit, control unit are connected with switching tube, control unit by the turn-on and turn-off of controlling switch pipe with control boosting unit carry out boost conversion work；Voltage doubling unit, voltage doubling unit is connected with boosting unit, and voltage doubling unit carries out multiplication of voltage conversion to the second direct current to export the 3rd direct current to LED unit, wherein, the voltage of 3rd direct current is more than the voltage of the second direct current, and the integral multiple of the voltage for the second direct current.The drive circuit of the present invention, the problem of can effectively solve the problem that drive circuit step-up ratio deficiency, while make it that LED electric current is consistent, the reliability of light fixture is improved, improves Consumer's Experience.
Description
Technical field
The present invention relates to field of illumination lamp technology, more particularly to a kind of LED drive circuit and one kind have driving electricity
The light fixture on road.
Background technology
LED lamp is as a kind of new energy-saving and environmental protection green light fixture product, the necessarily trend of future development.But
LED lamp product still has some deficits at present, many technology barriers be present, brings bad impression in use to user.
Lithium battery LED desk lamp light fixture in the market, because the supply voltage of lithium battery itself only has 3.7~4.25V,
And power is usually 2W, when being designed using 10 0.2W or 30 0.06W LED lamp bead, in order to meet common boost boostings
Converter is less than or equal to 5 requirement, multiple LED strings for maximum step-up ratio (step-up ratio=output voltage/input voltage)
Can only be by the way of in parallel.And under pattern of multiple LED strings in parallel connection, due to being had differences between LED pieces, cause more
The actual current of individual LED string is unbalanced.During user's use, when brightness regulation to than it is relatively low when, each LED luminance differs
Cause, influence Consumer's Experience, simultaneously as the current-unbalance of multiple LED strings, causes the aging of LED elder generations or failure that electric current is big,
Influence the reliability of light fixture.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
First purpose be to propose a kind of LED drive circuit, the problem of can effectively solve the problem that drive circuit step-up ratio deficiency, makes simultaneously
It is consistent to obtain LED electric current, improves the reliability of light fixture, improves Consumer's Experience.
Second object of the present invention is to propose a kind of light fixture.
To reach above-mentioned purpose, a kind of LED drive circuit that first aspect present invention embodiment proposes, including：Boosting is single
Member, the boosting unit include switching tube, and the boosting unit carries out boost conversion to export the to the first direct current of input
Two direct currents, wherein, the voltage of second direct current is more than the voltage of first direct current；Control unit, the control
Unit is connected with the switching tube, and described control unit controls the boosting by controlling the turn-on and turn-off of the switching tube
Unit carries out boost conversion work；Voltage doubling unit, the voltage doubling unit are connected with the boosting unit, and the voltage doubling unit is to institute
State the second direct current and carry out multiplication of voltage conversion to export the 3rd direct current to LED unit, wherein, the voltage of the 3rd direct current is big
In the voltage of second direct current, and the integral multiple of the voltage for second direct current.
LED drive circuit according to embodiments of the present invention, boosting unit carry out boost conversion to the first direct current of input
To export the second direct current, control unit is by the turn-on and turn-off of controlling switch pipe to control boosting unit to carry out boost conversion
Work, then voltage doubling unit carries out multiplication of voltage conversion to the second direct current to export the 3rd direct current to LED unit.Thus, the electricity
Road can effectively solve the problem that the problem of drive circuit step-up ratio deficiency, while make it that LED electric current is consistent, improve the reliable of light fixture
Property, improve Consumer's Experience.
In addition, the LED drive circuit proposed according to the above embodiment of the present invention can also have technology additional as follows special
Sign：
According to one embodiment of present invention, the boosting unit also includes：First inductance, the first of first inductance
End be connected with the positive terminal of first direct current, the other end of first inductance be connected with the first end of the switching tube and
With first node, the second end of the switching tube is grounded by examining leakage resistance, the control terminal of the switching tube and the control
The output end of unit is connected；First diode, the anode of first diode are connected with the first node；First electric capacity,
One end of first electric capacity is connected with the negative electrode of first diode and has a section point, first electric capacity it is another
End ground connection.
According to one embodiment of present invention, the voltage doubling unit includes：Second electric capacity, one end of second electric capacity with
The first node is connected；Second diode, the negative electrode of second diode are connected with the other end of second electric capacity, institute
The anode for stating the second diode is connected with the section point；3rd diode, the anode of the 3rd diode respectively with institute
The other end for stating the second electric capacity is connected with the negative electrode of second diode；3rd electric capacity, one end of the 3rd electric capacity and institute
The negative electrode for stating the 3rd diode is connected, and the other end of the 3rd electric capacity is connected with the section point.
According to one embodiment of present invention, the voltage doubling unit also includes：4th electric capacity, one end of the 4th electric capacity
It is connected with the first node；4th diode, the negative electrode of the 4th diode are connected with the other end of the 4th electric capacity,
The anode of 4th diode is connected with the other end of second electric capacity and the negative electrode of second diode respectively；5th
Diode, the anode of the 5th diode respectively with the other end of the 4th electric capacity and the negative electrode phase of the 4th diode
Even；5th electric capacity, one end of the 5th electric capacity are connected with the negative electrode of the 5th diode, the other end of the 5th electric capacity
It is connected respectively with the negative electrode of the 3rd diode and one end of the 3rd electric capacity.
According to one embodiment of present invention, the voltage of the 3rd direct current is the voltage two of second direct current
Times.
According to one embodiment of present invention, the voltage of the 3rd direct current is the voltage three of second direct current
Times.
According to one embodiment of present invention, above-mentioned LED drive circuit, in addition to：Voltage detection unit, the voltage
Detection unit is connected with the section point, and the voltage detection unit is detecting the voltage of second direct current；Electric current
Feedback unit, the current feedback unit are connected with the LED unit, and the current feedback unit is mono- to feed back the LED
The operating current of member；Wherein, the peak current detection end of described control unit is connected with the second end of the switching tube, the control
The over-pressed test side of unit processed is connected with the voltage detection unit, and the current feedback terminal of described control unit and the electric current are anti-
Feedback unit is connected, and described control unit is according to the peak point current of the switching tube, the voltage of second direct current and the LED
The operating current of unit adjusts the output to the control signal of the switching tube.
According to one embodiment of present invention, the LED unit includes the LED of multiple series connection.
According to one embodiment of present invention, the LED unit includes multiple first LED and multiple 2nd LED, Mei Ge
One LED with corresponding 2nd LED parallel connections to form a luminescence component, connect by multiple luminescence components.
To reach above-mentioned purpose, second aspect of the present invention embodiment also proposed a kind of light fixture, and it includes above-mentioned LED and driven
Dynamic circuit.
The light fixture of the embodiment of the present invention, by above-mentioned LED drive circuit, it can effectively solve the problem that drive circuit step-up ratio not
The problem of sufficient, while make it that LED electric current is consistent, the reliability of light fixture is improved, improves Consumer's Experience.
Brief description of the drawings
Fig. 1 is the schematic diagram of LED drive circuit according to an embodiment of the invention；
Fig. 2 is the schematic diagram of LED drive circuit in accordance with another embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The LED drive circuit that its is proposed according to embodiments of the present invention is described and with the drive circuit with reference to the accompanying drawings
Light fixture.
Fig. 1 is the schematic diagram of LED drive circuit according to an embodiment of the invention.
As shown in figure 1, the LED drive circuit of the embodiment of the present invention may include：Boosting unit 100, control unit 200 and again
Press unit 300.
Wherein, boosting unit 100 may include switching tube Q1, and boosting unit 100 boosts to the first direct current of input
Change to export the second direct current, wherein, the voltage of the second direct current is more than the voltage of the first direct current.Control unit 200 with
Switching tube Q1 is connected, and control unit 200 is by controlling switch pipe Q1 turn-on and turn-off to control boosting unit 100 to be boosted
Conversion work.Voltage doubling unit 300 is connected with boosting unit 100, and voltage doubling unit 300 carries out multiplication of voltage conversion to the second direct current with defeated
Go out the 3rd direct current to LED unit 400, wherein, the voltage of the 3rd direct current is more than the voltage of the second direct current, and straight for second
Flow the integral multiple of the voltage of electricity.
According to one embodiment of present invention, as shown in figure 1, boosting unit 100 may also include：First inductance L1, first
Diode D1 and the first electric capacity C1, wherein, the first inductance L1 first end is connected with the positive terminal of the first direct current, the first inductance
The L1 other end is connected with switching tube Q1 first end and has first node J1, and switching tube Q1 the second end is by examining leakage resistance
RCS is grounded GND, and switching tube Q1 control terminal is connected with the output end GATE of control unit 200.First diode D1 anode with
First node J1 is connected.First electric capacity C1 one end is connected with the first diode D1 negative electrode and with section point J2, and first
Electric capacity C1 other end ground connection GND.
Further, according to one embodiment of present invention, as shown in figure 1, voltage doubling unit 300 may include：Second electric capacity
C2, the second diode D2, the 3rd diode D3 and the 3rd electric capacity C3.Wherein, the second electric capacity C2 one end and first node J1 phases
Even.Second diode D2 negative electrode is connected with the second electric capacity C2 other end, the second diode D2 anode and section point J2
It is connected.3rd diode D3 anode is connected with the second electric capacity C2 other end and the second diode D2 negative electrode respectively.3rd
Electric capacity C3 one end is connected with the 3rd diode D3 negative electrode, and the 3rd electric capacity C3 other end is connected with section point J2.
In one embodiment of the invention, the voltage of the 3rd direct current for the second direct current twice of voltage.
According to one embodiment of present invention, as shown in figure 1, above-mentioned LED drive circuit may also include：Voltage detecting list
Member 500 and current feedback unit 600.Wherein, voltage detection unit 500 is connected with section point J2, and voltage detection unit 500 is used
To detect the voltage Vout1 of the second direct current.Current feedback unit 600 is connected with LED unit 400, and current feedback unit 600 is used
To feed back the operating current of LED unit 400.The peak current detection end CS and switching tube Q1 of control unit 200 the second end phase
Even, the over-pressed test side OVP of control unit 200 is connected with voltage detection unit 500, the current feedback terminal FB of control unit 200
It is connected with current feedback unit 600, control unit 200 is according to switching tube Q1 peak point current, the voltage and LED of the second direct current
The operating current of unit 4 adjusts the output to switching tube Q1 control signal.
According to one embodiment of present invention, as shown in figure 1, LED unit 400 may include the LED of multiple series connection.
Specifically, as shown in figure 1, during light fixture works, voltage detection unit detects the second direct current in real time
Voltage, the operating current of current feedback unit Real-time Feedback LED unit 400, the peak current detection CS ends of control unit 200 are real
When detection switch pipe Q1 peak point current, and according to switching tube Q1 peak point current, the voltage of the second direct current and LED unit
400 operating current is come the control signal to adjusting the output to switching tube Q1.For example, the voltage of the second direct current is smaller, LED is mono-
When the operating current of member 400 is smaller, the controlling switch pipe Q1 of control unit 200 conductings (such as output low level signal), so that boosting
Unit 100 carries out boost conversion, i.e., the first direct current is carried out into boost conversion, the second direct current, then, multiplication of voltage are exported after conversion
Unit 300 carries out multiplication of voltage conversion to the second direct current, to export the 3rd direct current to LED unit 400, to improve drive circuit
Step-up ratio.
For example, the voltage of the first direct current of input can be 3.7V lithium battery input voltages, by boosting unit
The voltage Vout1 of the second direct current after 100 progress boost conversions is 16.5V, and the second direct current is carried out by voltage doubling unit 300
The voltage Vout2 of the 3rd direct current is 33V after multiplication of voltage is changed, it is, the voltage of the 3rd direct current is the electricity of the second direct current
Twice of pressure, now step-up ratio=output voltage (the voltage 33V of the 3rd direct current)/input voltage (3.7V)=8.9189 times,
So as to widen the ratio of the output voltage of drive circuit and input voltage, step-up ratio deficiency is solve thed problems, such as.
In order to further widen the ratio of the output voltage of drive circuit and input voltage, according to another implementation of the present invention
Example, as shown in Fig. 2 voltage doubling unit 300 may also include：4th electric capacity C4, the 4th diode D4, the electricity of the 5th diode D5 and the 5th
Hold C5.Wherein, the 4th electric capacity C4 one end is connected with first node J1, and the 4th diode D4 negative electrode is another with the 4th electric capacity C4's
One end is connected, and the 4th diode D4 anode is connected with the second electric capacity C2 other end and the second diode D2 negative electrode respectively,
5th diode D5 anode is connected with the 4th electric capacity C4 other end and the 4th diode D4 negative electrode respectively, the 5th electric capacity C5
One end be connected with the 5th diode D5 negative electrode, the 5th electric capacity C5 other end respectively with the 3rd diode D3 negative electrode and
Three electric capacity C3 one end is connected.
According to one embodiment of present invention, the voltage of the 3rd direct current is three times of the voltage of the second direct current.
According to one embodiment of present invention, LED unit 400 may include multiple first LED and multiple 2nd LED, each
First LED with corresponding 2nd LED parallel connections to form a luminescence component, connect by multiple luminescence components.
Specifically, as shown in Fig. 2 during light fixture works, voltage detection unit detects the second direct current in real time
Voltage, the operating current of current feedback unit Real-time Feedback LED unit 400, the peak current detection CS ends of control unit 200 are real
When detection switch pipe Q1 peak point current, and according to switching tube Q1 peak point current, the voltage of the second direct current and LED unit
400 operating current is come the control signal to adjusting the output to switching tube Q1.For example, the voltage for working as the second direct current is smaller, LED
When the operating current of unit 400 is smaller, the controlling switch pipe Q1 of control unit 200 conductings (such as output low level signal), so as to rise
Press unit 100 to carry out boost conversion, i.e., the first direct current is subjected to boost conversion, the second direct current is exported after conversion, then, times
Unit 300 is pressed to carry out multiplication of voltage conversion to the second direct current, to export the 3rd direct current to LED unit 400, to improve drive circuit
Step-up ratio.
For example, the voltage of the first direct current of input can be 3.7V lithium battery input voltages, by boosting unit
The voltage Vout1 of the second direct current after 100 progress boost conversions is 16.5V, and the second direct current is carried out by voltage doubling unit 300
The voltage Vout2 of the 3rd direct current is 49.5V after multiplication of voltage is changed, it is, the voltage of the 3rd direct current is the second direct current
Three times of voltage, now step-up ratio=output voltage (the voltage 49.5V of the 3rd direct current)/input voltage (3.7V)=13.378
Times, so as to widen the ratio of the output voltage of drive circuit and input voltage, solve the problems, such as step-up ratio deficiency.
In summary, LED drive circuit according to embodiments of the present invention, boosting unit are carried out to the first direct current of input
Boost conversion is to export the second direct current, and control unit is by the turn-on and turn-off of controlling switch pipe to control boosting unit to carry out
Boost conversion works, and then voltage doubling unit carries out multiplication of voltage conversion to the second direct current to export the 3rd direct current to LED unit.By
This, the problem of circuit can effectively solve the problem that drive circuit step-up ratio deficiency, while make it that LED electric current is consistent, improve lamp
The reliability of tool, improves Consumer's Experience.
In addition, embodiments of the invention also proposed a kind of light fixture, it includes above-mentioned LED drive circuit.
The light fixture of the embodiment of the present invention, by above-mentioned LED drive circuit, it can effectively solve the problem that drive circuit step-up ratio not
The problem of sufficient, while make it that LED electric current is consistent, the reliability of light fixture is improved, improves Consumer's Experience.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In addition, in the description of the invention, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ",
" on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " clockwise ", " inverse time
The orientation or position relationship of the instruction such as pin ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or position relationship,
Be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
- A kind of 1. LED drive circuit, it is characterised in that including：Boosting unit, the boosting unit include switching tube, and the boosting unit carries out boosting to the first direct current of input and turned Change to export the second direct current, wherein, the voltage of second direct current is more than the voltage of first direct current；Control unit, described control unit are connected with the switching tube, and described control unit is by controlling leading for the switching tube Lead to and turn off to control the boosting unit to carry out boost conversion work；Voltage doubling unit, the voltage doubling unit are connected with the boosting unit, and the voltage doubling unit is carried out to second direct current Multiplication of voltage is changed to export the 3rd direct current to LED unit, wherein, the voltage of the 3rd direct current is more than second direct current Voltage, and for second direct current voltage integral multiple.
- 2. LED drive circuit as claimed in claim 1, it is characterised in that the boosting unit also includes：First inductance, the first end of first inductance are connected with the positive terminal of first direct current, first inductance The other end is connected with the first end of the switching tube and has first node, and the second end of the switching tube is connect by examining leakage resistance Ground, the control terminal of the switching tube are connected with the output end of described control unit；First diode, the anode of first diode are connected with the first node；First electric capacity, one end of first electric capacity is connected with the negative electrode of first diode and has section point, described The other end ground connection of first electric capacity.
- 3. LED drive circuit as claimed in claim 2, it is characterised in that the voltage doubling unit includes：Second electric capacity, one end of second electric capacity are connected with the first node；Second diode, the negative electrode of second diode are connected with the other end of second electric capacity, second diode Anode be connected with the section point；3rd diode, the anode of the 3rd diode other end with second electric capacity and second diode respectively Negative electrode be connected；3rd electric capacity, one end of the 3rd electric capacity are connected with the negative electrode of the 3rd diode, the 3rd electric capacity it is another End is connected with the section point.
- 4. LED drive circuit as claimed in claim 3, it is characterised in that the voltage doubling unit also includes：4th electric capacity, one end of the 4th electric capacity are connected with the first node；4th diode, the negative electrode of the 4th diode are connected with the other end of the 4th electric capacity, the 4th diode Anode be connected respectively with the other end of second electric capacity and the negative electrode of second diode；5th diode, the anode of the 5th diode other end with the 4th electric capacity and the 4th diode respectively Negative electrode be connected；5th electric capacity, one end of the 5th electric capacity are connected with the negative electrode of the 5th diode, the 5th electric capacity it is another End is connected with the negative electrode of the 3rd diode and one end of the 3rd electric capacity respectively.
- 5. LED drive circuit as claimed in claim 3, it is characterised in that the voltage of the 3rd direct current is described second Twice of the voltage of direct current.
- 6. LED drive circuit as claimed in claim 4, it is characterised in that the voltage of the 3rd direct current is described second Three times of the voltage of direct current.
- 7. such as the LED drive circuit any one of claim 2-6, it is characterised in that also include：Voltage detection unit, the voltage detection unit are connected with the section point, and the voltage detection unit is detecting The voltage of second direct current；Current feedback unit, the current feedback unit are connected with the LED unit, and the current feedback unit is to feed back State the operating current of LED unit；Wherein, the peak current detection end of described control unit is connected with the second end of the switching tube, described control unit Over-pressed test side is connected with the voltage detection unit, the current feedback terminal of described control unit and the current feedback unit phase Even, described control unit is according to the peak point current, the voltage of second direct current and the work of the LED unit of the switching tube Exported as current regulation to the control signal of the switching tube.
- 8. LED drive circuit as claimed in claim 3, it is characterised in that the LED unit includes the LED of multiple series connection.
- 9. LED drive circuit as claimed in claim 4, it is characterised in that the LED unit includes multiple first LED and more Individual 2nd LED, each first LED are with corresponding 2nd LED parallel connections to form a luminescence component, multiple luminescence component strings Connection.
- 10. a kind of light fixture, it is characterised in that including LED drive circuit as claimed in any one of claims 1-9 wherein.
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|---|---|---|---|
| CN201710995882.3A CN107666742A (en) | 2017-10-23 | 2017-10-23 | LED drive circuit and light fixture |
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|---|---|---|---|
| CN201710995882.3A CN107666742A (en) | 2017-10-23 | 2017-10-23 | LED drive circuit and light fixture |
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| CN101040422A (en) * | 2004-10-19 | 2007-09-19 | 罗姆股份有限公司 | Switching power supply control circuit, switching power supply device and electronic apparatus employing the same |
| US20080122291A1 (en) * | 2004-10-19 | 2008-05-29 | Rohm Co., Ltd | Switching Power Supply Control Circuit, Switching Power Supply Device and Electronic Apparatus Employing the Same |
| JP2006269137A (en) * | 2005-03-23 | 2006-10-05 | Masakazu Ushijima | Inverter circuit for inorganic el element |
| CN102510615A (en) * | 2011-10-25 | 2012-06-20 | 杭州鸿德照明科技有限公司 | Voltage-multiplying rectifying high-voltage power-supplying constant current driving circuit for serially connected LEDs (Light Emitting Diodes) |
| US9203321B1 (en) * | 2013-03-04 | 2015-12-01 | Universal Lighting Technologies, Inc. | Non-isolated resonant DC-DC converter with boost-type voltage doubler output |
| CN203368326U (en) * | 2013-06-28 | 2013-12-25 | 深圳Tcl新技术有限公司 | Boost circuit and LED driving power supply |
| CN203368849U (en) * | 2013-07-16 | 2013-12-25 | 深圳Tcl新技术有限公司 | LED driving circuit compatible with a variety of voltage outputs, and driving power source |
| CN204131399U (en) * | 2014-08-07 | 2015-01-28 | 青岛歌尔声学科技有限公司 | A kind of booster circuit |
| CN104619098A (en) * | 2014-11-21 | 2015-05-13 | 南京大学 | Low-voltage ET/TRIAC dimmable LED adapter |
| CN207783197U (en) * | 2017-10-23 | 2018-08-28 | 江西美的贵雅照明有限公司 | LED drive circuit and lamps and lanterns |
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Application publication date: 20180206 |