CN103188845B - The LED light emission device of alternating current Direct driver - Google Patents
The LED light emission device of alternating current Direct driver Download PDFInfo
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- CN103188845B CN103188845B CN201110457843.0A CN201110457843A CN103188845B CN 103188845 B CN103188845 B CN 103188845B CN 201110457843 A CN201110457843 A CN 201110457843A CN 103188845 B CN103188845 B CN 103188845B
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
The present invention relates to the alternating current direct driving technologies of LED light emission device.The present invention is directed to the shortcoming of the light-emitting flash that the direct driving LED light-emitting device of prior art alternating current causes, disclose a kind of LED light emission device of alternating current Direct driver.LED light emission device circuit of the present invention, is made up of the cascade of n level LED module, by shutoff and the turn-on voltage of the corresponding switch element of the suitable preset every one-level LED module of sampling unit, can avoid occurring scintillation when AC voltage fluctuations.Increase the quantity of LED module, be equivalent to the conducting voltage reducing every one-level LED module, improve the utilance of power supply.During the application of multi-stage LED module, when AC voltage fluctuations, the impact that each LED module is subject to adopts the impact of single module less relatively, and the stability of LED work is also better, and more reliably, the ability of anti-AC voltage fluctuations is stronger.
Description
Technical field
The present invention relates to LED (light-emitting diode) light-emitting device, particularly the alternating current direct driving technologies of LED light emission device.
Background technology
LED, as a kind of New Solid light source, is expected to become lighting source of new generation with advantages such as its energy-saving and environmental protection, life-span length.As everyone knows, existing LED is nearly all by DC powered, and our productive life electricity consumption is alternating current.Therefore, in the LED product used at present, need a power supply changeover device, alternating current is converted to direct current.The introducing of power supply changeover device, brings a lot of negative effect.One, the life-span of power supply changeover device, well below the life-span of LED self, makes shorten the useful life of lighting device; Its two, power supply changeover device can reduce the efficiency of light-emitting device; Its three, in low-power applications, power supply changeover device can cause the decline of power factor and the increase of current total harmonic distortion.In order to give full play to the advantage of semiconductor lighting, current study hotspot can be become by the LED light emission device of alternating current Direct driver.
In existing AC LED public technology, be use plurality of LEDs assembly to be formed by connecting according to the circuit topological structure of reverse parallel connection or bridge rectifier, to meet the driving requirement of alternating electromotive force mostly.But alternating current fluctuates according to certain frequency period, due to the existence of LED self cut-in voltage, when instantaneous voltage exceedes cut-in voltage, LED just can conducting also luminescence.Otherwise LED is that cut-off is non-luminous.This circuit makes the luminous efficiency of LED very low, and occurs light-emitting flash phenomenon along with AC voltage fluctuations.
In international monopoly WO 2004/023568A1 " LIGHT-EMITTING DEVICE HAVING LIGHT-EMITTINGELEMENTS ", propose integrated LED chip array on a sapphire substrate, thus provide a kind of alternating current power-actuated light-emitting device, but do not solve the light-emitting flash problem of LED.
US Patent No. 7,489,086B2 " AC LIGHT EITTING DIODE AND AC LED DRIVE METHODS ANDAPPARATUS " provides a kind of AC LED device, this invention is a kind of by the device of multiple LED integration packaging, utilizes the LED light-emitting flash phenomenon that the visual persistence effect of human eye causes to make up alternating current.This patent fundamentally solves AC voltage cycle and to fluctuate the light-emitting flash phenomenon caused.
Visible, disclosing in LED alternating-current Driving technique, the drive current that all there is shortcoming a: LED can fluctuate along with the fluctuation of alternating voltage, occurs that brightness changes, produce the phenomenon of light-emitting flash when causing LED luminous.Meanwhile, the core of LED component is a PN junction diode, and its I-V characteristic is approximate exponential function, and after the voltage at LED two ends is greater than cut-in voltage, the electric current flowing through PN junction exponentially increases.The AC driving method of prior art, when alternating voltage surprisingly raises, directly may damage LED component.
Summary of the invention
Technical problem to be solved by this invention, the shortcoming of the light-emitting flash caused for the direct driving LED light-emitting device of prior art alternating current exactly, a kind of LED light emission device of alternating current Direct driver is provided, overcome the LED scintillation that alternating current causes, and improve the efficiency of LED light emission device, extend the useful life of LED.
The present invention solve the technical problem, the technical scheme adopted is, the LED light emission device of alternating current Direct driver, comprise ac input end, protected location and rectification unit, it is characterized in that, first output of described rectification unit is connected to the second output, wherein n >=1 by n LED module and a switch element, and is integer; When n >=2, the passage also having switch element to form between every two LED modules is connected with the second output, and each switch element is connected with sampling unit;
Described ac input end for connecting alternating current, for device provides operating current;
Described protected location is connected with ac input end, for device provides defencive function;
Described rectification unit is connected with protected location, carries out rectification to the alternating current that protected location exports;
Described sampling unit is used for sampling to the output voltage of rectification unit, and outputs a control signal to each switch element;
Described switch element is connected with sampling unit, turns off according to the control signal that sampling unit exports or connects.
LED light emission device circuit of the present invention, is made up of the cascade of n level LED module, by shutoff and the turn-on voltage of the corresponding switch element of the suitable preset every one-level LED module of sampling unit, can avoid occurring scintillation when AC voltage fluctuations.Increase the quantity of LED module, be equivalent to the conducting voltage reducing every one-level LED module, improve the utilance of power supply.During the application of multi-stage LED module, when AC voltage fluctuations, the impact that each LED module is subject to adopts the impact of single module less relatively, and the stability of LED work is also better, and more reliably, the ability of anti-AC voltage fluctuations is stronger.
Concrete, described n LED module is made up of LED array.
Adopt LED array can form high-power LED module.
Further, described LED array is made up of at least 1 LED be arranged on same printed circuit board; Or integration packaging at least 1 LED is on the same substrate formed; Or integrated at least 1 LED is on the same semiconductor substrate formed.
Being arranged on same printed circuit board by LED all in LED module, is method for packing the most most economical under state-of-the-art; Or by LED integration packagings all in LED module on the same substrate, carry out secondary encapsulation by LED all in LED module, be integrated on same heat-radiating substrate; Or on the same semiconductor substrate integrated, this adopts semiconductor integrated circuit technique, and same semiconductor chip realizes the integrated of LED.These technology by the LED interlaced arrangement in each LED module, can also improve the uniformity of illuminating device luminous brightness, and are conducive to overcoming scintillation, and LED wiring is also more convenient.
Concrete, described LED is in parallel and/or be connected in series.
The connection combination that in LED module, LED is suitable, as parallel connection, series connection or series-parallel connection etc., more can adapt to the environment for use of alternating current Direct driver, adjust the electric current of each LED module, voltage parameter easily.
Concrete, described protected location comprises fuse and/or piezo-resistance, and described fuse is connected on ac input end, and described piezo-resistance is connected in parallel on ac input end.
Fuse is conventional current-limiting protection element, and piezo-resistance is then conventional voltage-limiting protection element, and their combination can complete the most basic current limliting and voltage-limiting protection, and cost is low, easy for installation, is convenient to carry out Two-level ensemble.
Further, described protected location also comprises common mode choke and/or gas discharge tube, and described common mode choke is connected on ac input end, and described gas discharge tube is connected in parallel on ac input end.
Common mode choke can suppress common mode disturbances, and gas discharge tube can protect lighting device not by injuries such as thunders and lightnings.
Concrete, the full-wave rectification that described rectification unit is made up of rectifier diode or half-wave rectifying circuit are formed.
Adopt rectifier diode as rectifier cell, small in volume, be convenient to Two-level ensemble encapsulation.
Concrete, described sampling unit is made up of resistor network.
Resistor network is applicable to gathering DC parameter very much, is convenient to configuration switch unit operating point.
Concrete, described switch element is made up of transistor, and described transistor controls pole is connected with sampling unit.
Transistor, as switch element, has and controls easily, contactless, long-life feature.
More specifically, described transistor is field-effect transistor or bipolar transistor, and described control is the grid of field-effect transistor or the base stage of bipolar transistor very.
Transistor switching element, technology maturation, is quick on the draw, reliable in action.
The invention has the beneficial effects as follows, use alternating electromotive force Direct driver LED module, circuit is simple, and volume is little, lightweight, and cost is low.By preset suitable shutoff voltage, realize alternating electromotive force Direct driver LED matrix and can not glimmer when AC voltage fluctuations.Further, when alternating current instantaneous voltage is too high, switch element turns off, and LED module is not luminous, improves the utilization ratio of power supply, reduces power consumption.Meanwhile, the situation also avoiding LED module to burn because electric current is excessive, extends the useful life of device.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of embodiment 1;
Fig. 2 is the circuit theory diagrams of embodiment 1;
Fig. 3 is the structured flowchart of embodiment 2;
Fig. 4 is the structured flowchart of embodiment 3;
Fig. 5 is the circuit theory diagrams of embodiment 3.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The LED light emission device of alternating current Direct driver of the present invention, comprises ac input end, protected location, rectification unit, sampling unit, switch element and n LED module, wherein n >=1, and is integer.In light-emitting device of the present invention, first output (being generally direct current output plus terminal) of rectification unit is connected to the second output (direct current output negative terminal) by n LED module and a switch element.When LED module quantity is more than 2, the passage also having switch element to form between every two LED modules is connected with the second output.Each switch element is connected with sampling unit, controls by it.LED light emission device circuit of the present invention, is made up of the cascade of n level LED module, by shutoff and the turn-on voltage of the corresponding switch element of the suitable preset every one-level LED module of sampling unit, can avoid occurring scintillation when AC voltage fluctuations.Increase the quantity of LED module, be equivalent to the conducting voltage reducing every one-level LED module, improve the utilance of power supply.During the application of multi-stage LED module, when AC voltage fluctuations, the impact that each LED module is subject to adopts the impact of single module less relatively, and the stability of LED work is also better, and more reliably, the ability of anti-AC voltage fluctuations is stronger.
Embodiment 1
See Fig. 1 and Fig. 2, this routine light-emitting device comprises ac input end 1, protected location 2, rectification unit 3, sampling unit 4, switch element 6 and LED module 5, and the quantity of this routine LED module 5 is 1 (i.e. n=1).First output of this routine rectification unit is direct current output plus terminal 31, and this anode 31 is connected to the second output direct current by LED module 5 switch element 6 and exports negative terminal 32.See Fig. 1.Ac input end 1 holds (phase line) and N to hold (zero line) to be connected with alternating current L, alternating current is introduced protected location 2.Protected location 2 provides basic defencive function to whole device, and be made up of piezo-resistance VR and fuse F, fuse F is connected in phase line, and piezo-resistance is connected in parallel between phase line and zero line, sees Fig. 2.For being applied to particular surroundings, protected location 2 also can comprise common mode choke and gas discharge tube.Common mode choke is connected on phase line and zero line, and gas discharge tube is generally connected in parallel between phase line and zero line.The full-wave rectifying circuit D that this routine rectification unit 3 is made up of rectifier diode forms, and carries out full-wave rectification to alternating current.This routine voltage sampling unit 4, the resistor network be made up of sampling resistor R1 and R2 is formed, the direct voltage exported by sampling rectification circuit D, control switch unit 6.As shown in Figure 2.This routine switch element 6 is made up of MOSFET (mos field effect transistor, be called for short field effect transistor) M1 and M2 and voltage stabilizing didoe DZ1, DZ2, resistance R3, R4 and R5.The array that this routine LED module 5 is made up of the LED of many series, parallel or series-parallel connection is formed, can be the multiple LED be arranged on same printed circuit board, or the multiple LEDs of integration packaging on same heat-radiating substrate, or the integrated circuit that integrated multiple LED are on the same semiconductor substrate formed.
When the instantaneous voltage of alternating current reaches the cut-in voltage of LED module 5, switch element 6 conducting under the driving of sampling unit 4, LED module 5 starts luminescence; When the instantaneous voltage of alternating current exceedes default shutoff voltage, switch element 6 turns off, and LED module 5 stops luminescence; When fluctuation appears in alternating current, within normal operating voltage range, time namely between the cut-in voltage and default shutoff voltage of LED module 5, the time point of the just turn-on and turn-off of switch element 6 changed, the luminescence of LED module 5 can not be glimmered.
As shown in Figure 2, rectification circuit D output plus terminal is connected with one end of resistance R1, is connected to the anode of LED module simultaneously, and the output negative terminal of rectification circuit D is as ground.The other end of resistance R1 is connected with the negative terminal of one end of resistance R2, voltage stabilizing didoe DZ1, one end of resistance R3; The other end of resistance R3 is connected with the grid of field effect transistor M1, and one end of the drain electrode of field effect transistor M1, one end of resistance R4, resistance R5, the negative terminal of voltage stabilizing didoe DZ2 connect.The other end of resistance R5 is connected with the grid of field effect transistor M2, and the negative terminal of the drain electrode of field effect transistor M2, the other end of resistance R4, LED module connects.The other end of resistance R2, the anode of voltage-stabiliser tube DZ1, the anode of voltage-stabiliser tube DZ2, the source electrode of field effect transistor M1, the source electrode of field effect transistor M2 be connected to (direct current output negative terminal).
When ac input end 1 is connected with electrical network, this lighting device obtains alternating electromotive force, through protected location 2, and by rectification unit 3, is rectified into direct current, is supplied to sampling unit 4, switch element 6 and LED module 5.In each ac cycle, rectification circuit D output voltage is started from scratch rising, and when voltage is elevated to the cut-in voltage of switch element, field effect transistor M1 turns off, M2 conducting, and LED module 5 starts luminescence; The electric current passed through along with input voltage rising LED module increases, and at voltage lower than the shutoff voltage stage of presetting, the undertension that sampling unit 4 exports is to make field effect transistor M1 conducting, and M1 keeps turning off, and M2 keeps conducting, LED module 5 continuous illumination; When voltage surprisingly raises, when exceeding default shutoff voltage, M1 starts conducting, and M2 turns off, and LED module is not luminous, and protection LED module 5 is from the impact of big current.
Embodiment 2
As shown in Figure 3, this routine light-emitting device LED module 5 has 2, switch element 6 is also 2, rectification unit 3 anode 31 (is labeled as switch element 2 by 2 LED modules and the 2nd switch element 6 in figure, other switch elements mark is similar) be connected with rectification unit 3 negative terminal 32, the passage having the 1st switch element 6 to form between the 1st LED module 5 and the 2nd LED module 5 is connected with rectification unit 3 negative terminal 32.This routine all switch element 6 is all connected with sampling unit 4.
Embodiment 3
As shown in Figure 4, this routine light-emitting device LED module 5 has 3, switch element 6 is also 3, rectification unit 3 anode 31 is connected with rectification unit 3 negative terminal 32 with the 3rd switch element 6 by 3 LED modules, the passage having the 1st switch element 6 to form between the 1st LED module 5 (be labeled as LED module 1 in figure, other LED modules mark is similar) and the 2nd LED module 5 is connected with rectification unit 3 negative terminal 32.The passage also having the 2nd switch element 6 to form between the 2nd LED module 5 and the 3rd LED module 5 is connected with rectification unit 3 negative terminal 32.This routine all switch element 6 is all connected with sampling unit 4.
The circuit theory diagrams of this routine device as shown in Figure 5, its operation principle and particular circuit configurations similar to Example 1, do not repeating herein.This routine sampling unit 4 is by resistance R1, R2; R6, R7; R11, R12 are formed; three switch elements 6; with 3 LED module groups, 5 one-tenth three grades of circuit; three switch elements 6 control three LED modules respectively, are arranged the turn-off time of every one-level switch by sampling unit 4 respectively, and protect corresponding LED module 5.Along with the increase of LED module quantity, be equivalent to the conducting voltage reducing each LED module, improve the utilance of power supply.During the application of multi-stage LED module, when AC voltage fluctuations, the impact that each LED module is subject to adopts the impact of single module less relatively, and the stability of LED work is also better, and more reliably, the ability of anti-AC voltage fluctuations is stronger.
Through above-mentioned explaination in detail, can find out that voltage sampling unit monitoring input voltage of the present invention also has the defencive function to LED module simultaneously.When large fluctuation appears in alternating voltage time, switch element also can disconnect in time, and protection LED module does not damage because electric current is excessive.
It should be noted that: although above-described embodiment has described structure of the present invention in detail, the present invention is not limited to above-described embodiment, the replacing structure of the routine that every those skilled in the art carry out according to foregoing description, all belongs to protection scope of the present invention.
Claims (8)
1. the LED light emission device of alternating current Direct driver, comprise ac input end, protected location and rectification unit, it is characterized in that, the first output of described rectification unit is connected to the second output by n LED module and a switch element, wherein n >=1, and be integer; When n >=2, the passage also having switch element to form between every two LED modules is connected with the second output, and each switch element is connected with sampling unit;
Described ac input end for connecting alternating current, for device provides operating current;
Described protected location is connected with ac input end, for device provides defencive function;
Described rectification unit is connected with protected location, carries out rectification to the alternating current that protected location exports;
Described sampling unit is used for sampling to the output voltage of rectification unit, and outputs a control signal to each switch element;
Described switch element is connected with sampling unit, turns off according to the control signal that sampling unit exports or connects;
Described switch element comprises the 3rd to the 5th resistance, the first and second voltage stabilizing didoes and the first and second field effect transistor, wherein
One end of 3rd resistance is connected to point pressure side of described sampling unit;
The negative terminal of the first voltage stabilizing didoe and point press bond of described sampling unit, positive ending grounding;
The grid of the first field effect transistor is connected to the other end of the 3rd resistance, source ground;
One end of the drain electrode of the first field effect transistor, one end of the 4th resistance, the 5th resistance is connected with the negative terminal of the second voltage stabilizing didoe;
The other end of the 5th resistance is connected with the grid of the second field effect transistor; Drain electrode, the other end of the 4th resistance of the second field effect transistor are connected with the negative terminal of the LED module of correspondence;
The anode of the second voltage stabilizing didoe and the source ground of the second field effect transistor;
The shutoff voltage of and switch element that every one-level LED module corresponding preset by sampling unit and turn-on voltage are to avoid occurring glimmering during AC voltage fluctuations.
2. the LED light emission device of alternating current Direct driver according to claim 1, is characterized in that, described n LED module is made up of LED array.
3. the LED light emission device of alternating current Direct driver according to claim 2, is characterized in that, described LED array is made up of at least 1 LED be arranged on same printed circuit board; Or integration packaging at least 1 LED is on the same substrate formed; Or integrated at least 1 LED is on the same semiconductor substrate formed.
4. the LED light emission device of alternating current Direct driver according to claim 3, is characterized in that, described LED is in parallel and/or be connected in series.
5. the LED light emission device of alternating current Direct driver according to claim 1, is characterized in that, described protected location comprises fuse and/or piezo-resistance, and described fuse is connected on ac input end, and described piezo-resistance is connected in parallel on ac input end.
6. the LED light emission device of alternating current Direct driver according to claim 5; it is characterized in that; described protected location also comprises common mode choke and/or gas discharge tube, and described common mode choke is connected on ac input end, and described gas discharge tube is connected in parallel on ac input end.
7. the LED light emission device of alternating current Direct driver according to claim 1, is characterized in that, the full-wave rectification that described rectification unit is made up of rectifier diode or half-wave rectifying circuit are formed.
8. the LED light emission device of alternating current Direct driver according to claim 1, is characterized in that, described sampling unit is made up of resistor network.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457843.0A CN103188845B (en) | 2011-12-31 | 2011-12-31 | The LED light emission device of alternating current Direct driver |
| CN201510353228.3A CN104918387B (en) | 2011-12-31 | 2011-12-31 | A kind of LED light device of exchange driving |
| PCT/CN2012/087382 WO2013097692A1 (en) | 2011-12-31 | 2012-12-25 | Alternating current direct drive led light-emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457843.0A CN103188845B (en) | 2011-12-31 | 2011-12-31 | The LED light emission device of alternating current Direct driver |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510353228.3A Division CN104918387B (en) | 2011-12-31 | 2011-12-31 | A kind of LED light device of exchange driving |
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| CN103188845A CN103188845A (en) | 2013-07-03 |
| CN103188845B true CN103188845B (en) | 2015-08-05 |
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| CN201510353228.3A Active CN104918387B (en) | 2011-12-31 | 2011-12-31 | A kind of LED light device of exchange driving |
| CN201110457843.0A Active CN103188845B (en) | 2011-12-31 | 2011-12-31 | The LED light emission device of alternating current Direct driver |
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| CN201510353228.3A Active CN104918387B (en) | 2011-12-31 | 2011-12-31 | A kind of LED light device of exchange driving |
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| WO (1) | WO2013097692A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104540287B (en) * | 2012-10-30 | 2017-11-17 | 四川新力光源股份有限公司 | LED dimming driving circuits |
| CN102892238B (en) * | 2012-10-30 | 2015-02-04 | 四川新力光源股份有限公司 | Dimming drive circuit of AC (Alternating Current) direct drive LED module |
| CN104427688B (en) * | 2013-08-23 | 2016-09-28 | 四川新力光源股份有限公司 | LED alternating-current drive circuit |
| CN104936330B (en) * | 2014-03-18 | 2020-05-19 | 赵依军 | LED driving power supply and LED lighting device comprising same |
| FR3020122B1 (en) * | 2014-04-22 | 2018-07-13 | Renault S.A.S. | METHOD FOR CONTROLLING A LIGHT EMITTING DIODE LIGHT OR SIGNALING LIGHT FOR A MOTOR VEHICLE |
| CN104519645B (en) * | 2014-11-27 | 2019-01-08 | 上海航空电器有限公司 | A kind of guide-lighting drive circuit based on PWM light modulation |
| CN104582137B (en) * | 2014-11-28 | 2019-01-04 | 上海航空电器有限公司 | The multi-level dimming circuit of three kinds of alarm signals |
| US9913325B1 (en) * | 2017-02-03 | 2018-03-06 | Semiconductor Components Industries, Llc | LED direct AC drive circuit |
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- 2011-12-31 CN CN201510353228.3A patent/CN104918387B/en active Active
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2012
- 2012-12-25 WO PCT/CN2012/087382 patent/WO2013097692A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2013097692A1 (en) | 2013-07-04 |
| CN104918387A (en) | 2015-09-16 |
| CN103188845A (en) | 2013-07-03 |
| CN104918387B (en) | 2019-02-12 |
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Denomination of invention: Light emitting diode (LED) light-emitting device directly driven by alternating current Effective date of registration: 20181212 Granted publication date: 20150805 Pledgee: Sichuan energy investment Refco Group Ltd Pledgor: Sichuan Sunfor Light Co., Ltd. Registration number: 2018510000135 |
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