CN103813577B - A kind of self-oscillation LED drive system and semiconductor illumination device - Google Patents
A kind of self-oscillation LED drive system and semiconductor illumination device Download PDFInfo
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- CN103813577B CN103813577B CN201210459804.9A CN201210459804A CN103813577B CN 103813577 B CN103813577 B CN 103813577B CN 201210459804 A CN201210459804 A CN 201210459804A CN 103813577 B CN103813577 B CN 103813577B
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 30
- 238000005286 illumination Methods 0.000 title claims abstract description 14
- 230000001939 inductive effect Effects 0.000 claims abstract description 55
- 238000009434 installation Methods 0.000 claims abstract description 22
- 230000011664 signaling Effects 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 abstract description 3
- 238000004146 energy storage Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 9
- 230000006698 induction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000036772 blood pressure Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
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Abstract
A kind of self-oscillation LED drive system and semiconductor illumination device. Described drive system, including: fairing, it is used for connecting external power source, carries out rectification and filtering; Start device, connect fairing; Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling; Supply control unit is controlled by switch element; Signaling control unit, is constituted self-oscillation by the pair of inductive element around connecting resistive and capacitive element switch element is controlled, and the invention provides the low semiconductor light source driving system of a kind of simple in construction, cost and semiconductor illumination device.
Description
Technical field
The present invention relates to the drive system of a kind of semiconductor light source and systems a kind of self-oscillation LED drive system and semiconductor illumination device.
Background technology
Semiconductor light source (LED) is light source and the display device of third generation semi-conducting material manufacturing, has the features such as power consumption is few, life-span length, pollution-free, rich color, controllability are strong, is lighting source and the revolution of light industry. Along with the development of LED, increasing LED illumination product floods the market. The electric drive part of LED is an indispensable ingredient in LED illumination product.
Current LED market, LED illumination terminal price remains above conventional bulb and electricity-saving lamp, and price reduction becomes the key expanding market acceptance. Along with the continuous decline of LED particle price, the price ratio of electric drive part is more aobvious important, is popularized the LED driver circuit used in the market and mostly adopts IC control, and it major drawback is that Costco Wholesale is higher.
Therefore, the semiconductor light source driving system how providing a kind of simple in construction, cost low becomes the outstanding problem of semiconductor applications development. For problems of the prior art, this programme proposes a kind of self-oscillation LED drive system and semiconductor illumination device is one of semiconductor light source driving system technical field problem anxious to be resolved at present.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, the non-constant width of range of application, with low cost mainly for the electronic drive circuitry in LED illumination product. The present invention uses less components and parts to realize the electric drive part of LED, greatly reduces component number and cost, makes the ratio that electric drive part accounts in LED illumination System significantly reduce, and the feature that lamps structure is simple, cost is low, loss in efficiency reduces.
Embodiments providing a kind of self-oscillation LED drive system, described drive system includes: fairing, is used for connecting external power source, carries out rectification and filtering; Start device, connect fairing; Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling; Supply control unit is controlled by switch element; Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
According to embodiments of the present invention, described signaling control unit is constituted self-oscillation by the pair of inductive element (202) around (201) series connection capacitive element (203) and resistance element (204) switch element (300) is controlled.
According to embodiments of the present invention, first end (301) of described switch element (300) is connected with the second end of the resistance element (204) of signaling control unit.
According to embodiments of the present invention, described signaling control unit is made up of inductive element (202), diode (401) and capacitive element (402), wherein, first end of diode (401) and the first end of capacitive element (402) connect, second end of capacitive element (402) is connected with the first end of inductive element (202), and the second end of the second end of inductive element (202), diode (401) is connected to second end (302) of switch element (300).
According to embodiments of the present invention, described startup device comprises resistance element (101), diode (102), wherein, first end of resistance element (101) is connected to fairing, second end of resistance element (101) is connected to the first end of diode (102), and the second end ground connection of diode (102).
A kind of semiconductor illumination device, including:
Semiconductor light source load;
Fairing, is used for connecting external power source, carries out rectification and filtering;
Start device, connect fairing;
Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling;
Supply control unit is controlled by switch element;
Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
According to embodiments of the present invention, described load is single or multiple LED groups.
According to embodiments of the present invention, the constituted mode of described LED group includes but not limited to that the mixed type attachment structure being connected in series or being connected in parallel or connection in series-parallel connects electrically connects.
According to below with reference to the accompanying drawing description of this invention, other targets of the present invention and effectiveness will become clear from, and reader can fully understand the present invention.
Accompanying drawing explanation
Fig. 1 is LED drive system modular structure connection diagram;
Fig. 2 is LED drive system circuit diagram according to embodiments of the present invention;
Fig. 3 is the electric supply installation structural representation of LED drive system according to embodiments of the present invention;
The operating diagram startup stage that Fig. 4 being LED drive system according to embodiments of the present invention;
Fig. 5 is LED drive system the first energy storage stage operating diagram according to embodiments of the present invention;
Fig. 6 is that LED drive system according to embodiments of the present invention releases energy stage operating diagram;
Fig. 7 is LED drive system the second energy storage stage operating diagram according to embodiments of the present invention.
In above-mentioned accompanying drawing, same reference numerals indicates element identical, similar or corresponding or function.
Detailed description of the invention
Specific embodiments of the invention are described in detail by embodiment below in reference to graphic.
The present invention uses less components and parts to realize the electric drive part of LED, greatly reduces component number and cost, makes the ratio that electric drive part accounts in LED illumination System significantly reduce.
Fig. 1 is self-oscillation LED drive system modular structure connection diagram of the present invention.
Fairing, is used for connecting external power source, carries out rectification and filtering;
Start device, connect fairing;
Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling;
Supply control unit is controlled by switch element;
Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
Fig. 2 is LED drive system circuit diagram according to embodiments of the present invention.
Specifically, in embodiments of the present invention, fairing 10, its one end is connected to exchange (AC) power supply including electric fuse 11 provided by outside, and the other end (outfan) 13 is connected to load device 40;
Start device 20, be used for connecting fairing 10;
Electric supply installation 30, it is connected with starting device 20, by inductive element 202 via pair around 201 connection resistance element 204 and capacitive elements 203, control part as switch element 300, the load device 40 that electric supply installation 30 is connected is powered controlling, for when drive system is connected to load device 40, coordinating fairing 10 that load device 40 is powered, and the first outfan 31 of electric supply installation 30 and the second end outfan 32 be connected to load device 40.
In fig. 2, external communication (AC) power supply is (such as, 120VAC) can be business AC line voltage distribution, and when as shown in Figure 2 bridge diode 12(being comprised four unipolar tube D1, D2, D3, D4) when being applied to fairing 10, the AC voltage of input can be output as full-wave rectified voltage, and suitable electric current is supplied to load device 40.
In this article, outside exchange (AC) power supply including electric fuse 11 provided, its input voltage range is exchange (AC) power supply 120V/50 ~ 60Hz ~ 240V/50 ~ 60Hz, and input voltage range is direct current (DC) power supply 12V ~ 400V.
As in figure 2 it is shown, in this programme, use the combination of a small amount of components and parts to form self-oscillation circuit, in conjunction with blood pressure lowering circuit, constitute a LED electronic driver. Namely pair is used to input around the control signal as a switch element on an inductive element, size that one resistance element of middle series connection and capacitive element input as control signal and time, use a diode as the charge and discharge control of capacitive element, use this inductive element to connect a diode and a capacitive element produces direct current output.
Specifically, in the present embodiment, start device 20 and comprise resistance element 101, diode 102, wherein, first end of resistance element 101 is connected to one end of fairing 10, and the second end of resistance element 101 is connected to the first end of diode 102, and the second end ground connection of diode 102.
Electric supply installation 30 comprises inductive element 201 and 202, capacitive element 203, resistance element 204, switch element 300, diode 401 and capacitive element 402, wherein, first end of diode 401 with start device 20 resistance element 101 the first end be connected, second end of resistance element 101 is connected with the first end 301 of the second end of resistance element 204 and switch element 300 respectively, the second end of diode 102 starting device 20 is connected with the 3rd end 303 of switch element 300 and ground connection, first end of capacitive element 203 is connected with inductive element 201 first end, inductive element 201 second end then ground connection, second end of capacitive element 203 is connected with the first end of resistance element 204, first end of inductive element 202 is connected with the second end of capacitive element 402, second end of inductive element 202 is connected with the second end 302 of the second end of diode 401 and switch element 300.
Load device 40 comprises and load unit 501, and wherein, capacitive element 402 and the load unit 501 of electric supply installation 30 are connected in parallel.
As in figure 2 it is shown, in this programme, use the combination of a small amount of components and parts to form self-oscillation circuit, in conjunction with blood pressure lowering circuit, constitute a LED electronic driver. Namely use secondary around 201 on an inductive element 202, namely inductive element 201 inputs as the control signal of a switch element 300, size that one resistance element 204 of middle series connection and capacitive element 203 input as control signal and time, use a diode 401 to control as the charging and discharging of capacitive element 402, use this inductive element 202 to connect a diode 401 and a capacitive element 402 produces direct current output.
Therefore, further, as it is shown on figure 3, in this programme electric supply installation 30 can include signaling control unit, switch element and supply control unit, the size inputted by signaling control unit control signal and time, and be powered load device controlling according to switch element. Wherein, signaling control unit comprise secondary around 201, capacitive element 203 and resistance element 204, constituted self-oscillation by the pair of inductive element 202 around 201 series connection capacitive elements 203 and resistance element 204 switch element 300 is controlled, wherein, first end of diode 401 and the first end of capacitive element 402 connect, second end of capacitive element 402 is connected with the first end of inductive element 202, and the second end of the second end of inductive element 202, diode 401 is connected to the second end 302 of switch element 300.
Additionally, switch element, including a switch element 300, being connected to the supply control unit starting device 20 and electric supply installation 30, wherein, the first end 301 of switch element 300 is connected with the second end of the resistance element 204 of signaling control unit; Supply control unit, including an inductive element 202, diode 401 and capacitive element 402, is connected to above-mentioned switch element and load device 40, for being powered load device 40 controlling according to switch element.
Wherein, load is powered controlling by supply control unit;
Supply control unit is controlled by switch element;
Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
Therefore, in embodiments of the present invention, by using inductive element secondary around connecting a resistance element and capacitive element control part as a switch element, form a self-oscillation circuit, and this inductive element and switch element are connected with load (LED), and using this inductive element and switch element junction as positive voltage deferent segment, this outfan is also in series with a diode.
Further, in the present invention, the output current scope 20mA ~ 300mA of electric supply installation 30, output voltage range 12V ~ 300V.
In fig. 2, specifically in this programme, load device 40 is single or multiple LED groups. Load device 40 can be the light source 501 including at least one LED, and can include multiple LED with various electrical connection. In fig. 2, the multiple LED constituting load device 40 illustrate with the state being connected in series, but multiple LED included in load device 40 can also electrically connect with the mixed type attachment structure being connected in series or being connected in parallel or connection in series-parallel connects according to the application system of application LED.
Further, in embodiments of the present invention, described startup device 20 makes the switch element 300 in electric supply installation 30 in the conduction state for when starting (that is, when initially applying in input voltage vin).Described power supply control apparatus 30 includes signaling control unit, supply control unit, signal generating unit and switch element, and the inductive element 202 in described supply control unit is for receiving input voltage and carrying out energy storage under the control of described switch element and release energy. Described signal generating unit is produced induced signal by the sensing of the inductive element in described supply control unit, for controlling conducting and the cut-off of described switch element. Diode 401 in described supply control unit is for the energy storage according to the inductive element in described supply control unit and releases and can differently power to described load device (semiconductor light source).
Startup stage: as shown in Figure 4, after semiconductor light source driving system of the present invention is connected to DC input voitage Vin, Vin is carried out electric discharge produced electric current I1 by base stage 301 and the emitter stage 303 of resistance element 101 and switch element 300, makes the colelctor electrode 302 of switch element 300 and emitter stage 303 turn on. Vin passes through capacitive element 402 and load unit 501, and the colelctor electrode 302 of inductive element 202 and switch element 300 and emitter stage 303 carry out electric discharge and produce electric current I2. Hereafter, semiconductor light source driving system of the present invention entered for the first energy storage stage.
The first energy storage stage: as shown in Figure 5, I2 passes through capacitive element 402, capacitive element 402 starts to charge up, I2 passes through load simultaneously, semiconductor light source load starts luminescence, and I2 is again through inductive element 202, and inductive element 202 energy storage also produces voltage V2 at its two ends, synchronous signal generating unit 201 is produced induction electromotive force V1, the V1 base stage 301 by capacitive element 203, resistance element 204 and switch element 300 by inductive element 202 sensing and emitter stage 303 carries out electric discharge and produces electric current I3. Capacitive element 203 is charged by I3. Capacitive element 203 two ends produce direction as shown voltage V3. Along with the rising of V3, I3 declines, and makes pass element 300 end therewith. But, the electric current owing to flowing through inductive element 202 can not suddenly change, and therefore this electric current flow to semiconductor light source load unit 501 and capacitive element 402 by diode 401, and makes inductive element 202 both end voltage V2 reverse. Hereafter, semiconductor light source driving system of the present invention enters and releases the energy stage.
Releasing the energy stage: as shown in Figure 6, the induction electromotive force V1 that signal generating unit 201 is produced by inductive element 202 sensing is reverse equally. V1 is carried out electric discharge produced electric current I4 by diode 102, resistance element 204, capacitive element 203. Switch element 300 ends. Inductive element 202 both end voltage V2 is discharged with capacitive element 402 and semiconductor light source load unit 501 by diode 401, and inductive element 202 releases energy, is that capacitive element 402 charging produces voltage V5 simultaneously. Capacitive element 203 reverse charging is produced backward voltage V4 by electric current I4. When inductive element 202 both end voltage V2 is decreased below capacitive element 402 both end voltage V5, stop releasing energy. Hereafter, semiconductor light source driving system of the present invention entered for the second energy storage stage. This second energy storage stage is different with the described first energy storage stage, and in this second energy storage stage, described semiconductor light source supported V is luminous.
The second energy storage stage: as shown in Figure 7, capacitive element 402 both end voltage V5 is discharged by semiconductor light source load unit 501, capacitive element 203 both end voltage V4 is discharged by resistance element 204, the base stage 301 of switch element 300 and the inductive element 201 of emitter stage 303 and signal generating unit, produce electric current I5, make the colelctor electrode 302 of switch element 300 and emitter stage 303 turn on.Vin is carried out electric discharge produced electric current I2 by colelctor electrode 302 and the emitter stage 303 of inductive element 202 and switch element 300. Inductive element 202 energy storage, produces voltage V2 at its two ends. It follows that with reference to the supply control unit in the first energy storage stage diagram and switch element come continuing on. The inductive element 201 of signal generating unit is produced induction electromotive force V1, the V1 base stage 301 by capacitive element 203, resistance element 204 and switch element 300 by inductive element 202 sensing and emitter stage 303 carries out electric discharge and produces electric current I3. Capacitive element 203 is charged by I3. Capacitive element 203 two ends produce direction as shown voltage V3. Along with the rising of V3, I3 declines, and makes switch element 300 end therewith. Can not suddenling change yet with the electric current flowing through inductive element 202, therefore this electric current flow to semiconductor light source load unit 501 by diode 401, and makes inductive element 202 both end voltage V2 reverse. Hereafter, semiconductor light source driving system of the present invention is again introduced into releasing the energy stage.
Then, semiconductor light source driving system of the present invention, from releasing and the stage can be again introduced into for the second energy storage stage, so circulates.
Above-described embodiment is exemplary, and without wishing to the technical method of they restriction present invention. Although describing the present invention in detail with reference to preferred embodiment; but it is understood by those skilled in the art that; can revising when not necessarily departing from the spirit and scope of the technology of the present invention method or the equivalent technical method replacing the present invention, these amendments and equivalent replacement fall within the protection category of claims of the present invention.
Claims (6)
1. a self-oscillation LED drive system, including:
Fairing, is used for connecting external power source, carries out rectification and filtering;
Start device, connect fairing;
Wherein, described startup device comprises resistance element and diode;
Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling;
Wherein, described supply control unit, including inductive element, diode and capacitive element, it is connected to switch element and load, for being powered load controlling according to switch element;
Supply control unit is controlled by switch element;
Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
2. drive system as claimed in claim 1, described signaling control unit is constituted self-oscillation by the pair of inductive element (202) around (201) series connection capacitive element (203) and resistance element (204) switch element is controlled.
3. drive system as claimed in claim 1, described switch element comprises a switch element (300), and first end (301) of described switch element (300) is connected with the second end of the resistance element (204) of signaling control unit.
4. drive system as claimed in claim 1, described supply control unit is made up of inductive element (202), diode (401) and capacitive element (402), wherein, first end of diode (401) and the first end of capacitive element (402) connect, second end of capacitive element (402) is connected with the first end of inductive element (202), and the second end of the second end of inductive element (202), diode (401) is connected to second end (302) of switch element (300).
5. drive system as claimed in claim 1, first end of the resistance element (101) of described startup device is connected to fairing, second end of resistance element (101) is connected to the first end of diode (102), and the second end ground connection of diode (102).
6. a semiconductor illumination device, including:
Semiconductor light source load;
Fairing, is used for connecting external power source, carries out rectification and filtering;
Start device, connect fairing;
Wherein, described startup device comprises resistance element and diode;
Electric supply installation, is connected with starting device, and electric supply installation includes supply control unit and is powered load controlling;
Wherein, described supply control unit, including inductive element, diode and capacitive element, it is connected to switch element and load, for being powered load controlling according to switch element;
Supply control unit is controlled by switch element;
Signaling control unit, and capacitive element resistive around connection by the pair of inductive element constitutes self-oscillation and switch element is controlled.
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| CN201210459804.9A CN103813577B (en) | 2012-11-15 | 2012-11-15 | A kind of self-oscillation LED drive system and semiconductor illumination device |
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| CN201210459804.9A CN103813577B (en) | 2012-11-15 | 2012-11-15 | A kind of self-oscillation LED drive system and semiconductor illumination device |
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| CN105228288B (en) * | 2014-05-30 | 2018-03-06 | 欧普照明股份有限公司 | The constant-current drive circuit and driving method of luminescent device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008166165A (en) * | 2006-12-28 | 2008-07-17 | Toshiba Lighting & Technology Corp | Lighting device |
| CN101932170A (en) * | 2009-06-22 | 2010-12-29 | 凹凸电子（武汉）有限公司 | Drive circuit and method, electronic system and the controller of load |
| CN102141205A (en) * | 2010-02-03 | 2011-08-03 | 联笙电子股份有限公司 | Light source system capable of effectively dissipating heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6856103B1 (en) * | 2003-09-17 | 2005-02-15 | Varon Lighting, Inc. | Voltage regulator for line powered linear and switching power supply |
| EP2225824B1 (en) * | 2008-05-15 | 2016-07-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Voltage transformer circuit and method for feeding power into an energy accumulator in a pulsed manner |
| US8305004B2 (en) * | 2009-06-09 | 2012-11-06 | Stmicroelectronics, Inc. | Apparatus and method for constant power offline LED driver |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008166165A (en) * | 2006-12-28 | 2008-07-17 | Toshiba Lighting & Technology Corp | Lighting device |
| CN101932170A (en) * | 2009-06-22 | 2010-12-29 | 凹凸电子（武汉）有限公司 | Drive circuit and method, electronic system and the controller of load |
| CN102141205A (en) * | 2010-02-03 | 2011-08-03 | 联笙电子股份有限公司 | Light source system capable of effectively dissipating heat |
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