CN103841700B - A kind of LED drive system and semiconductor illumination device - Google Patents
A kind of LED drive system and semiconductor illumination device Download PDFInfo
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- CN103841700B CN103841700B CN201210485120.6A CN201210485120A CN103841700B CN 103841700 B CN103841700 B CN 103841700B CN 201210485120 A CN201210485120 A CN 201210485120A CN 103841700 B CN103841700 B CN 103841700B
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Abstract
The present invention relates to a kind of LED drive system and semiconductor illumination device. Described drive system, including: fairing, connect external power source, alternating voltage is carried out rectification; Electric supply installation, is powered load; Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal; One-shot device, dynamic control device and fairing is driven for connecting, carry out starting control to driving dynamic control device by enabling signal when drive system energized, this one-shot device is only when being just switched on, power supply can provide electric current for chip or other components and parts, is again switched on to provide electric current for chip or other components and parts after dump.
Description
Technical field
The present invention relates to the drive system of a kind of semiconductor light source and systems a kind of 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 drives; first time starts circuit and all adopts the mode being directly connected to resistance; its mode is relatively easy, but in abnormal cases, aft section enters abnormal protection state; or entrance off state; but there is no any setting owing to starting device, can be again started up again after entering off state, thus can be again introduced into again abnormal protection state or enter off state; so that circuit is ceaselessly again started up, line security is left hidden danger.
Therefore, how providing a kind of simple in construction, cost is low, reliability and safety is higher only once starts, the semiconductor light source driving system being just restarted after power-off becomes the outstanding problem of semiconductor applications development. For problems of the prior art, this programme proposes a kind of 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, cost is low, reliability and safety is higher only once starts, the semiconductor light source driving system being just restarted after power-off. 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 provide a kind of LED drive system, described in include:
Fairing, connects external power source, alternating voltage is carried out rectification;
Electric supply installation, is powered load;
Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal;
One-shot device, drives dynamic control device and fairing for connection, carries out starting control to driving dynamic control device by enabling signal when drive system energized.
According to embodiments of the present invention, described one-shot device (20) comprises resistance element (201), capacitive element (202), resistance element (203) and diode (204), wherein, first end of resistance element (201) is connected with the first end of capacitive element (202), second end of resistance element (201) is connected with the second end of diode (204), and the first end of resistance element (203) and the second end are connected to the second end of capacitive element (202) and the first end of diode (204).
According to embodiments of the present invention, the state that the switch element driving dynamic control device is carried out on and off by enabling signal by described one-shot device controls.
According to embodiments of the present invention, described in drive dynamic control device, the electric supply installation connected is carried out energy storage and releases energy by the control signal produced by switch element.
According to embodiments of the present invention, described in drive dynamic control device and include control unit and switch element, wherein, the form of the composition of control unit includes but not limited to chip type or discrete component formula.
According to embodiments of the present invention, described control unit adopts discrete component formula, comprise the first diode (302), the second diode (307), resistance element (308), the first capacitive element (301), the second capacitive element (309) and switch element (310), wherein, inductive element (402) one end of the first end of the first capacitive element (301) and the first end of the first diode (302) and electric supply installation 40 connects;
Second end of the first capacitive element (301) is connected with the first end of resistance element (308), and the first end of the second end of the first diode (302) and the first end of the second capacitive element (309) and the second diode (307) connects;
First end of the second end of resistance element (308) and the second end of the second diode (307) and switch element (310) connects; Second end ground connection of switch element (310), the 3rd end of switch element (310) is connected with diode (404) one end of electric supply installation (40).
According to embodiments of the present invention, described electric supply installation carries out energy storage and releases energy, is realize energy storage by inductive element and release energy.
According to embodiments of the present invention, described electric supply installation, when drive system is connected to load, carries out energy storage by the inductive element of electric supply installation and release energy, being capacitive element charging when inductive element releases energy, also power for load device simultaneously.
A kind of semiconductor illumination device, including:
Semiconductor light source load;
Fairing, connects external power source, alternating voltage is carried out rectification;
Electric supply installation, is powered load;
Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal;
One-shot device, drives dynamic control device and fairing for connection, carries out starting control to driving dynamic control device by enabling signal when drive system energized.
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 a first embodiment of the present invention;
Fig. 3 is LED drive system circuit diagram according to a second embodiment of the present invention;
Fig. 4 is that driving according to a second embodiment of the present invention controls apparatus structure schematic diagram.
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.
Fig. 1 is LED drive system modular structure connection diagram of the present invention.
Fairing, connects external power source, alternating voltage is carried out rectification;
Electric supply installation, is powered load;
Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal;
One-shot device, drives dynamic control device and fairing for connection, carries out starting control to driving dynamic control device by enabling signal when drive system energized.
Fig. 2 is LED drive system circuit diagram according to a first embodiment of the present invention.
Specifically, in embodiments of the present invention, fairing 10, its one end is connected to exchange (AC) power supply provided by outside, and the other end (outfan) is connected to one-shot device 20; One-shot device 20, drives dynamic control device 30 for connection, carries out starting control to driving dynamic control device 30 by the change of current signal; Drive dynamic control device 30, be used for connecting one-shot device 20, the electric supply installation 40 connected is carried out energy storage by changing of current signal and releases energy; Electric supply installation 40, drives dynamic control device 30 for connection, it is achieved load device 50 is powered.
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 101(being comprised four diodes 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 one-shot device 20. Further, in this programme, fairing 10 also comprises a capacitive element 102, the two ends of capacitive element 102 respectively with two outfans of bridge diode 101.
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 shown in Figure 2, in this programme, one-shot device 20 comprises resistance element 201, capacitive element 202, resistance element 203, diode 204, wherein, first end of resistance element 201 is connected with the first end of capacitive element 202, second end of resistance element 201 is connected with the second end of diode 204, and the first end of resistance element 203 and the second end are connected to the second end of capacitive element 202 and the first end of diode 204. As in figure 2 it is shown, when, after energising, capacitive element 202 starts to charge up, electric current passes through capacitive element 202 and resistance element 203.
As in figure 2 it is shown, in this programme, drive dynamic control device and include control unit and switch element, wherein, the form of the composition of control unit includes but not limited to chip type or discrete component formula. wherein, chip type is as shown in Figure 2, drive dynamic control device 30 and comprise switch element 303, resistance element 304, capacitive element 305, diode 306, and a control chip 311, wherein, first end of diode 306 is connected to the inductive element 402 of electric supply installation 40, second end of diode 306 is connected to the first end of capacitive element 305 and control chip 311, second end of capacitive element 305 is connected with the second end of resistance element 304 and ground connection, second end of control chip 311 is connected with the first end of switch element 303, 3rd end of control chip 311 is connected with the first end of resistance element 304, second end of switch element 303 connects one end of the inductive element 401 of electric supply installation 40, 3rd end of switch element 303 is connected with the first end of resistance element 304.As shown in Figure 2, when after energising, capacitive element 202 starts to charge up, electric current passes through capacitive element 202 and resistance element 203, powers for control chip 311, and control chip 311 is started working, control chip 311 exports control signal and controls opening and closing of switch element 303, making inductive element 401 carry out energy storage and release energy, inductive element is released and can be charged for capacitive element 403, also powers for load device 50 simultaneously.
As shown in Figure 2, in this programme, electric supply installation 40 comprises inductive element 401, inductive element 402, diode 404 and capacitive element 403, wherein, first end of inductive element 401 is connected with the first end of the capacitive element 202 of one-shot device 20 and the first end of capacitive element 403, second end of inductive element 401 is connected with the first end of diode 404, first end of inductive element 402 is connected with the first end of diode 306, second end ground connection of inductive element 402, the second end of diode 404 is connected with the second end of capacitive element 403. As shown in Figure 2, when after energising, capacitive element 202 starts to charge up, electric current passes through capacitive element 202 and resistance element 203, powers for control chip 311, and control chip 311 is started working, control chip 311 exports control signal and controls opening and closing of switch element 303, making inductive element 401 carry out energy storage and release energy, inductive element is released and can be charged for capacitive element 403, also powers for load device 50 simultaneously.
Further, when electric current flows through capacitive element 202 two ends, capacitive element 202 both end voltage raises, until both end voltage is equal to after input voltage, flowing through capacitive element 202, resistance element 203 electric current is 0, owing to capacitive element 102 both end voltage is equal to capacitive element 202 both end voltage, capacitive element 202 both end voltage will not decline, so cannot power for control chip 311, has reached to make the startup circuit only work when energising starts of this drive system again. When this drive system capacitive element 102 after a loss of power and after capacitive element 202 discharged by resistance element 201, capacitive element 102 both end voltage declines, make this drive system startup device can after being once again powered up task again.
As shown in Figure 2, in this programme, load device 50 comprises load 501 and the load 502 of two series connection, wherein, first end of load 501 is connected with capacitive element 403 first end of electric supply installation 40, second end of load 501 is connected with the first end of load 502, and the second end of load 502 is connected with the second end of the diode 404 of electric supply installation 40. Specifically, load device 50 can be single or multiple LED group. Load device 50 can be the light source including at least one LED, and can include multiple LED with various electrical connection. In fig. 2, the multiple LED constituting load device 50 illustrate with the state being connected in series, but multiple LED included in load device 50 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.
Fig. 3 is LED drive system circuit diagram according to a second embodiment of the present invention.
Driving dynamic control device and include control unit and switch element, wherein, the form of the composition of control unit includes but not limited to chip type or discrete component formula. wherein, discrete component formula is as shown in Figures 3 and 4, in this embodiment, drive dynamic control device 60 and comprise capacity cell 301, diode 302, diode 307, resistance element 308, capacitive element 309 and switch element 310, wherein, first end of capacity cell 301 is connected with inductive element 402 one end of the first end of diode 302 and electric supply installation 40, second end of capacity cell 301 is connected with the first end of resistance element 308, second end of diode 302 is connected with the first end of the first end of capacitive element 309 and diode 307, second end of resistance element 308 is connected with the first end of the second end of diode 307 and switch element 310, second end ground connection of switch element 310, 3rd end of switch element 310 is connected with the first end of the diode 404 of electric supply installation 40.
As shown in Figure 3, when, after energising, capacitive element 202 starts to charge up, electric current passes through capacitive element 202 and resistance element 203, starting current is provided for switch element 310, switch element 310 works, and makes inductive element 401 energy storage, and inductive element 402 produces voltage by coupling simultaneously, control opening and closing of switch element 310, making inductive element 401 energy storage and release energy, inductive element is released and can be charged for capacitive element 403, also powers for load device 50 simultaneously.
Electric current flows through capacitive element 202 two ends, capacitive element 202 both end voltage raises, until both end voltage is equal to after input voltage, flow through capacitive element 202, resistance element 203 electric current is 0, and owing to capacitive element 102 both end voltage is equal to capacitive element 202 both end voltage, capacitive element 202 both end voltage will not decline, so cannot power for control chip again, reach to make the startup circuit only work when energising starts of this drive system. When this drive system capacitive element 102 after a loss of power and capacitive element 202 are discharged by resistance element 201, capacitive element 102 both end voltage declines, make this drive system startup device can after being once again powered up task again.
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 (8)
1. a LED drive system, including:
Fairing, connects external power source, alternating voltage is carried out rectification;
Electric supply installation, is powered load;
Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal;
One-shot device, drives dynamic control device and fairing for connection, carries out starting control to driving dynamic control device by enabling signal when drive system energized;
Wherein, described one-shot device comprises resistance element (201), capacitive element (202), resistance element (203) and diode (204), wherein, first end of resistance element (201) is connected with the first end of capacitive element (202), second end of resistance element (201) is connected with the second end of diode (204), and the first end of resistance element (203) and the second end are connected to the second end of capacitive element (202) and the first end of diode (204).
2. drive system as claimed in claim 1, it is characterised in that the state that the switch element driving dynamic control device is carried out on and off by enabling signal by described one-shot device controls.
3. drive system as claimed in claim 1, it is characterised in that described in drive dynamic control device, the electric supply installation connected is carried out energy storage and releases energy by the control signal produced by switch element.
4. drive system as claimed in claim 1, it is characterised in that described in drive dynamic control device and include control unit and switch element, wherein, the form of the composition of control unit includes but not limited to chip type or discrete component formula.
5. drive system as claimed in claim 4, it is characterized in that, described control unit adopts discrete component formula, comprise the first diode (302), the second diode (307), resistance element (308), the first capacitive element (301), the second capacitive element (309) and switch element (310), wherein, inductive element (402) one end of the first end of the first capacitive element (301) and the first end of the first diode (302) and electric supply installation 40 connects;
Second end of the first capacitive element (301) is connected with the first end of resistance element (308), and the first end of the second end of the first diode (302) and the first end of the second capacitive element (309) and the second diode (307) connects;
First end of the second end of resistance element (308) and the second end of the second diode (307) and switch element (310) connects; Second end ground connection of switch element (310), the 3rd end of switch element (310) is connected with diode (404) one end of electric supply installation (40).
6. drive system as claimed in claim 1, it is characterised in that described electric supply installation carries out energy storage and releases energy, is realize energy storage by inductive element and release energy.
7. drive system as claimed in claim 1, it is characterised in that described electric supply installation, when drive system is connected to load, carry out energy storage by the inductive element of electric supply installation and release energy, being capacitive element charging when inductive element releases energy, also power for load device simultaneously.
8. a semiconductor illumination device, including:
Semiconductor light source load;
Fairing, connects external power source, alternating voltage is carried out rectification;
Electric supply installation, is powered load;
Drive dynamic control device, control the electric supply installation connected carries out energy storage and releases energy by control signal;
One-shot device, dynamic control device and fairing is driven for connecting, carry out starting control to driving dynamic control device by enabling signal when drive system energized, wherein, described one-shot device comprises resistance element (201), capacitive element (202), resistance element (203) and diode (204), wherein, first end of resistance element (201) is connected with the first end of capacitive element (202), second end of resistance element (201) is connected with the second end of diode (204), first end of resistance element (203) and the second end are connected to the second end of capacitive element (202) and the first end of diode (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210485120.6A CN103841700B (en) | 2012-11-26 | 2012-11-26 | A kind of LED drive system and semiconductor illumination device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210485120.6A CN103841700B (en) | 2012-11-26 | 2012-11-26 | A kind of LED drive system and semiconductor illumination device |
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| CN103841700A CN103841700A (en) | 2014-06-04 |
| CN103841700B true CN103841700B (en) | 2016-06-15 |
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| CN101990342A (en) * | 2009-07-31 | 2011-03-23 | 三洋电机株式会社 | Light-emitting diode driver circuit and lighting apparatus |
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2012
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Patent Citations (6)
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| CN101005722A (en) * | 2006-01-20 | 2007-07-25 | 松下电器产业株式会社 | Light emitting diode drive apparatus |
| CN101203081A (en) * | 2007-10-22 | 2008-06-18 | 深圳市众明半导体照明有限公司 | Supply apparatus for light modulation of LED |
| 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 |
| CN101990342A (en) * | 2009-07-31 | 2011-03-23 | 三洋电机株式会社 | Light-emitting diode driver circuit and lighting apparatus |
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| CN103841700A (en) | 2014-06-04 |
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