CN101435565A - LED illuminating apparatus - Google Patents
LED illuminating apparatus Download PDFInfo
- Publication number
- CN101435565A CN101435565A CNA2007100481590A CN200710048159A CN101435565A CN 101435565 A CN101435565 A CN 101435565A CN A2007100481590 A CNA2007100481590 A CN A2007100481590A CN 200710048159 A CN200710048159 A CN 200710048159A CN 101435565 A CN101435565 A CN 101435565A
- Authority
- CN
- China
- Prior art keywords
- voltage
- unit
- led
- lighting device
- led lighting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses an LED illuminating device, which comprises a driving power supply and an LED light source module, wherein the driving power supply comprises at least two driving circuits which are connected in parallel; and the anode of the LED light source module is connected with the anode of the driving power supply, and the cathode of the LED light source module is connected with the cathode of the driving power supply to allow other driving circuits to still drive the LED light source module when one or more driving circuits break down and do not work normally, thereby ensuring that the LED illuminating device can continue to illuminate.
Description
[technical field]
The present invention relates to a kind of LED lighting device, or rather, relate to a kind of LED lighting device with a plurality of parallel driver circuits.
[background technology]
LED has advantages such as environmental protection, energy-conservation, life-span be long and is regarded as the 21 century lighting source, has now begun to replace conventional light source and has widely applied on various lightings.LED lighting device great majority in the market all adopt a drive circuit to drive the mode of whole LED light source module, there is certain defective in this type of drive: if the drive circuit damage of breaking down in use, will cause whole LED light source module not work, the use of lighting device will be influenced at once, and this is to some special occasions, such as road lighting, tunnel illumination etc., will produce comparatively and seriously influence, such as causing traffic accident etc. easily, therefore, be necessary existing LED lighting device is improved.
[summary of the invention]
Technical problem to be solved by this invention is to overcome above-mentioned defective, and a kind of modified form LED lighting device with more reliable driving power is provided.
LED lighting device of the present invention is achieved through the following technical solutions: a kind of LED lighting device, comprise driving power and led light source module, described driving power comprises the drive circuit of at least two parallel connections, the positive pole of led light source module is connected with the positive pole of driving power, and the negative pole of led light source module is connected with the negative pole of driving power.
Also be in series with a diode between described each drive circuit and the led light source module.
The circuit structure of described each drive circuit is all identical with power.
The power sum of described each drive circuit equals the power of led light source module.
Described drive circuit comprises: a power input; One rectification filtering unit that links to each other with power input; Output unit is changed and delivered to one voltage transformation module that links to each other with rectification filtering unit, the described voltage transformation module voltage after to rectifying and wave-filtering; One output unit that links to each other with voltage transformation module, the output of described output unit links to each other with load LED; One switch element that is connected with voltage transformation module, described switch element are controlled the voltage transitions of described voltage transformation module according to its turn-on and turn-off; The one PFC control module that is connected with switch element, described PFC control module produce a control signal and control periodically turn-on and turn-off of described switch element.
Described drive circuit comprises that also one decides current control unit with output unit with the constant voltage that the PFC control module is connected, and described constant voltage is decided current control unit and comprised a constant voltage unit and a constant current unit.
Described constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and described voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
Described constant current unit comprises a current comparator, and the benchmark of described current comparator is taken from the voltage stabilizing portion of described constant voltage unit.
Described led drive circuit also comprises an EMI filter unit, and described EMI filter unit includes a piezo-resistance, and described switch element comprises a triode or FET.
Described LED lighting device is LED street lamp, LED Projecting Lamp or LED Tunnel Lamp.
Compared with prior art, disclosed LED lighting device comes driving LED light source module by drive circuit in parallel more than at least two is set, make under one even a plurality of drive circuit break down the situation of cisco unity malfunction, other drive circuits are driving LED light source module in the same old way, guarantees that the LED lighting device can continue illumination.
[description of drawings]
Fig. 1 is the circuit theory framework schematic diagram of the embodiment of the invention 1.
Fig. 2 is the drive circuit principle framework figure of the embodiment of the invention 1.
Fig. 3 is the drive circuit circuit diagram of the embodiment of the invention 1.
Fig. 4 is the circuit theory framework schematic diagram of the embodiment of the invention 2.
[specific embodiment]
See also LED lighting device shown in Figure 1, disclosed (lighting device of LED described in the present embodiment especially refers to LED street lamp, LED Projecting Lamp or LED Tunnel Lamp) and comprise driving power and led light source module.Described driving power comprises the AC/DC drive circuit of two parallel connections, and the positive pole of described led light source module is connected with the positive pole of AC/DC driving power, and the negative pole of led light source module is connected with the negative pole of AC/DC driving power.The structure and the power of described two AC/DC drive circuits are basic identical, and the power sum of described two AC/DC drive circuits equals the power of led light source module.In the use, when one of them AC/DC drive circuit damaged, another AC/DC drive circuit drove whole LED illuminating module, at this moment, and 1/2 work of the power of led light source module during with two normal AC/DC drive circuit driving LED light source modules.Be in series with a diode between described each AC/DC drive circuit and the led light source module, to realize directed conducting.
Below in conjunction with Fig. 2 specify in the present embodiment to be adopted the structure theory of constitution of AC/DC drive circuit.Described AC/DC drive circuit comprises that external power input, EMI filter unit, rectification filtering unit, voltage transformation module, output unit, switch element, constant voltage decide current control unit and PFC control module.Wherein, the input of EMI filter unit links to each other with the external power input, be mainly used in the noise that suppresses electric network noise and self produce, eliminate electrical network to the influence of AC/DC driving power and AC/DC driving power to the influence of electrical network, improve the antijamming capability of AC/DC driving power and the reliability of system.The output of EMI filter unit links to each other with the input of rectification filtering unit, exports after converting direct current and filtering to behind the signal rectification that rectification filtering unit transmits the EMI filter unit.Voltage transformation module links to each other with rectification filtering unit, switch element and output unit, it receives the signal of rectification filtering unit output, under the control of switch element, carry out voltage transitions, and the voltage after will changing outputs to output unit, export LED to by output unit again and drive its work.Voltage transformation module also links to each other with the PFC control module, for the PFC control module provides working power.Switch element links to each other with PFC control module and voltage transformation module, and it is subjected to control signal control of PFC control module output and turn-on and turn-off periodically, and thereby the voltage transitions of control voltage transformation module.Described switch element can be triode or FET.Constant voltage is decided current control unit and is linked to each other with the PFC control module with output unit, and it is gathered the voltage and current signal of output unit and produce one and feeds back signal to the PFC control module, by the PFC control module output is accurately adjusted.Described constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit, described constant voltage unit is gathered the voltage signal of output unit and is relatively produced a feedback signal in the back with a reference voltage, and described constant current unit is gathered the current signal of output unit and relatively produced a feedback signal in the back with a reference current.The PFC control module links to each other with the constant voltage constant current unit with switch element, mainly starts to control to make to use.The output of PFC control module produces a control signal and controls periodically turn-on and turn-off of described switch element, and the feedback signal adjustment control signal that can decide current control unit according to constant voltage, to adjust the cycle of switch element turn-on and turn-off, thereby adjust the output of voltage transformation module, realize accurate adjustment the LED operating current.Owing to added constant voltage unit and constant current unit at output unit, both can adjust also and can adjust the voltage of output to the electric current of output, carry out feedback adjusting compared to simple employing constant current unit and have better adjustment effect, though under the situation that a certain parallel branch LED opens circuit, also can well realize to output accurate adjustment.In order further to strengthen accurate control to the AC/DC driving power, the PFC control module is also sampled to output, switch element, the voltage transformation module of rectification filtering unit, and according to sampled signal adjustment control signal, thereby adjust the output of voltage transformation module, reach the purpose of further accurately adjusting the LED operating current and improving power factor.
See also shown in Figure 3ly, this concrete enforcement in circuit, the EMI filter unit is made up of capacitor C 1, C2, C3, C4 and wave filter L1 and piezo-resistance RV1.Piezo-resistance RV1 is mainly used in the damage that protection may cause AC/DC driving power and LED when increasing because of line voltage moment.Rectification filtering unit mainly is made up of bridge rectifier and the filter capacitor C5 that four diode D1, D2, D3, D4 form.Voltage transformation module mainly is made of high frequency transformer.High frequency transformer comprises a former limit T1, the first secondary T2 and the second secondary T3, and wherein, input 1 pin of former limit T1 links to each other with the output of rectification filtering unit B by an inductance L 2, and output 2 pin link to each other with switch element.The first secondary T2 directly connects an output unit of being made up of diode D8, capacitor C 12, C13, C14, C15, C17 and resistance R S parallel with one another, and the output of output unit is directly linked load LED by a terminals JP2, for LED provides operating current.The second secondary T3 provides working power by connecting a Voltage stabilizing module to PFC control module IC2.Described Voltage stabilizing module is made of diode D6, D7, triode Q1, voltage-stabiliser tube Z3 and capacitor C 6.Wherein, the positive pole of diode D6 links to each other with 5 pin of the second secondary T3, receives the colelctor electrode of triode Q1 after the series connection of diode D6, D7 forward, is connected by a resistance R 10 between the base stage of triode Q1 and the colelctor electrode.Simultaneously, the base stage of triode Q1 links to each other with the negative pole of voltage-stabiliser tube Z3, and the positive pole of voltage-stabiliser tube Z3 links to each other with the positive pole of diode D3 in the rectification filtering unit by the back that links to each other with another pin 6 pin of the second secondary T3.Between the positive pole of the negative pole of diode D6 and voltage-stabiliser tube Z3, also be connected to a filter capacitor C6.The supply pin VCC of PFC control chip IC2 in the emitter stage of triode Q1 and the PFC control module links to each other, and IC2 provides working power for the PFC control chip.Described switch element mainly comprises a FET M1, the drain electrode of FET M1 links to each other with the former limit T1 of high frequency transformer, its grid links to each other with the CC port of PFC control chip IC2 by a resistance R 12, and source electrode links to each other with the positive pole of diode D3 in the rectification filtering unit with two parallel resistor R15, R16 series connection back.Be parallel with a diode D12 at resistance R 12 two ends, and the positive pole of diode D12 links to each other with the grid of FET M1.Former limit T1, the FET M1 of EMI filter unit, rectification filtering unit, high frequency transformer and resistance R 15, R16 constitute a loop.For protection FET M1, between its drain electrode and source electrode, also be connected to a voltage-stabiliser tube Z4.In order to prevent FET to be caused damage, also be parallel with a protection branch road that constitutes by diode D5, voltage-stabiliser tube Z1 at the former limit T1 of high frequency transformer because of the spike that the leakage inductance of high frequency transformer produced in the moment that FET M1 turn-offs.Constant voltage is decided current control unit and is comprised a constant voltage unit and a constant current unit.Described constant voltage unit mainly is made up of a voltage comparator ic 5 and peripheral circuit thereof, and described peripheral circuit comprises diode D11, D9, capacitor C 16, C18, resistance R 18, R19, R20, R21 and voltage stabilizing chip IC 4.Wherein, the positive pole of diode D11 links to each other with the negative pole of diode D8 in the output unit, a branch road of its negative pole connects capacitor C 16 back ground connection, another branch road connects a resistance R 18 and is voltage comparator ic 5 power supplies, also has a branch road to pass through connection one resistance R 21 and the voltage stabilizing chip IC 4 back ground connection of series connection mutually.The negative electrode K of voltage stabilizing chip IC 4 links to each other with resistance R 21, anode A ground connection, and negative electrode K with link to each other with reference to utmost point R.The positive pole of voltage comparator ic 5 inputs links to each other with the reference utmost point R of voltage stabilizing chip IC 4.Resistance R 19, R20 are connected between the negative pole and ground of diode D8 in the output unit mutually, and draw a branch road link to each other with the negative pole of voltage comparator ic 5 inputs between resistance R 19 and R20.Link to each other with input 2 pin of photo-coupler IC3 behind the output reversal connection one diode D9 of voltage comparator ic 5, another pin 1 pin of photo-coupler IC3 input links to each other with the negative pole of diode D8 by a resistance R 17, and the output of photo-coupler IC3 links to each other with PFC control chip IC2.Simultaneously, between the output of voltage comparator ic 5 and input cathode, also be parallel with a capacitor C 18.Described constant current unit mainly comprises a current comparator IC6 and peripheral circuit composition thereof, and described current comparator IC6 and voltage comparator ic 5 all adopt voltage stabilizing chip IC 4 place branch roads as its a reference source, described peripheral circuit comprises resistance R 22, R23, R24, capacitor C 19, C20 and diode D10.Wherein, an end of resistance R 22 links to each other with the reference utmost point R of voltage stabilizing chip IC 4, and the other end connects the positive pole of resistance R 23 and current comparator IC6 input, the other end ground connection of resistance R 23.The negative pole of current comparator IC6 input links to each other with an end of the contiguous load of resistance R S in the output unit by a resistance R 24, and simultaneously, the negative pole of current comparator IC6 input also connects a capacitor C 20 back ground connection.Link to each other with 2 pin of photo-coupler IC3 input behind the output reversal connection one diode D10 of current comparator IC6, simultaneously, also be parallel with a capacitor C 19 between the output of current comparator IC6 and the input cathode.
The PFC control module mainly is made up of PFC control chip IC2 and peripheral circuit thereof, and described peripheral circuit comprises resistance R 1, R3, R5, R7, R9, R11, R12, R13, R14 and capacitor C 7, C8, C9, C10.Wherein, an end of resistance R 1 links to each other with the output of rectification filtering unit, and other end series resistance R3 successively links to each other with the positive pole of diode D3 in the rectification filtering unit with resistance R 9 backs, is parallel with a capacitor C 9 simultaneously at the two ends of resistance R 9.The end that resistance R 3 links to each other with resistance R 9 also links to each other with the V+ pin of PFC control chip IC2, and this pin is by the output sampling to rectification filtering unit of resistance R 1, resistance R 3 and resistance R 9 place branch roads.Resistance R 5, resistance R 7 are connected mutually, and the other end of resistance R 5 links to each other with the negative pole of diode D4 in the rectification filtering unit, the other end of resistance R 7 connects capacitor C 7 backs and links to each other with the positive pole of diode D3 in the rectification filtering unit, and this end of resistance R 7 also links to each other with the power end VCC pin of PFC control chip IC2.The VCC pin of PFC control chip IC2 also links to each other with the emitter stage of triode Q1.The sampling pin C pin of PFC control chip links to each other with 5 pin of the second secondary T3 of high frequency transformer, and this pin is gathered the output signal of the second secondary T3.The control signal output pin CC of PFC control chip IC2 links to each other with the grid of FET M1 by a resistance R 12, its output one-period property control signal is controlled periodically turn-on and turn-off of described FET M1, thereby reaches the purpose of control high frequency transformer C high frequency transformation.The sampling pin FB of described PFC control chip IC2 links to each other with the source electrode of FET M1, and its grounding leg GND links to each other with the positive pole of diode D3 in the rectification filtering unit, its another sampling pin B with also link to each other behind series resistance R13, the R14 successively with the positive pole of diode D3.Output pin 3 pin of photo-coupler IC3 are connected between resistance R 13 and the resistance R 14; and in order to protect photo-coupler IC3; between its two output pins, 3 pin and 4 pin, also be connected to a voltage-stabiliser tube Z2; wherein; the positive pole of voltage-stabiliser tube Z2 links to each other with 4 pin of photo-coupler IC3, and 4 pin of photo-coupler IC3 also link to each other with the negative pole of diode D7 in the Voltage stabilizing module.
The operation principle of described physical circuit is as follows: extraneous power network current is delivered to the EMI filtering unit filters through exchanging fuse F1, output to high frequency transformer after bridge rectifier rectification that filtered signal is formed via diode D1, D2, D3, D4 and capacitor C 5 filtering, form the loop through FET M1, resistance R 15, R16 and diode D3 again.The control signal that PFC control module IC2 produces is through control signal output pin CC control FET M1 periodical high-frequency turn-on and turn-off, thereby produce a voltage signal at the first secondary T2 and deliver to the two ends of LED, for LED provides working power via the output unit of diode D8, filter capacitor C12, C13, C14, C15, C17 composition.Simultaneously, the branch road that output unit is formed through diode D11, resistance R 21 and voltage stabilizing chip IC 4 from the signal of diode D8 output forms a reference signal source at voltage-stabiliser tube IC4, and described reference signal source is added in the reference voltage of the positive input terminal of voltage comparator ic 5 as voltage comparator ic 5.Output unit is added in the negative input end of voltage comparator ic 5 from the voltage of diode D8 output after resistance R 19, R20 dividing potential drop, the voltage of described negative input end and reference voltage export the negative pole of diode D9 after relatively to.If voltage change is when causing diode D9 conducting, electric current flow through resistance R 17, photo-coupler IC3 input and diode D9 are added to feedback signal by photo-coupler IC3 the B pin of PFC control chip IC2.PFC control chip IC2 is according to the control signal of the feedback signal adjustment that receives output, thereby adjusts the output of high frequency transformer by the turn-on and turn-off of control FET M1, with fast that voltage is stable.In addition, the signal at voltage stabilizing chip IC 4 two ends is added in the positive input terminal of current comparator IC6 as reference signal through resistance R 22 and resistance R 23 dividing potential drops, the electric current that flows through resistance R S is added in the negative input end of current comparator IC6 after resistance R 24, the signal of described negative input end and reference signal output to diode D10 after relatively.When the electric current that flows through resistance R S changed, it changed the output that is reflected to current comparator IC6 rapidly by current comparator IC6, causes diode D10 conducting, by photo-coupler IC3 feedback signal was added to the B pin of PFC control chip IC2 equally.PFC control chip IC2 is according to the control signal of the feedback signal adjustment that receives output, thereby adjusts the output of high frequency transformer by the turn-on and turn-off of control FET M1, will flow through the current stabilization of resistance R S fast.By above-mentioned constant voltage unit and constant current unit, realized accurate adjustment to output loading LED.Owing on the basis of constant current unit, added constant voltage circuit, under the situation that a certain paths of LEDs opens circuit even the feasible accurate adjustment that still can realize output loading LED has better adjustment effect compared to single employing constant current unit.Secondly, the V+ pin of PFC control chip IC2, C pin and FB pin are also gathered signal, the second secondary T3 of high frequency transformer and the source signal of FET M1 of rectification filtering unit output respectively, described PFC control chip IC2 adjusts control signal according to the signal that collects, and reaches the purpose of further accurately adjusting the LED operating current and improving power factor.
See also shown in Figure 4ly, the difference of present embodiment and embodiment 1 is that described driving power comprises three AC/DC parallel driver circuits.The structure of described three AC/DC drive circuits and power are also basic identical, and the power sum of these three AC/DC drive circuits equals the power of led light source module, and the particular circuit configurations of described AC/DC drive circuit is identical with embodiment 1.In the use, when one of them or two drive circuits damaged, remaining intact drive circuit drove the work of whole LED illuminating module.Obviously, described driving power also can have four or the formation in parallel of more a plurality of drive circuit, enumerates no longer one by one at this.
LED lighting device of the present invention is by adopting the drive circuit driving LED light source module of at least two parallel connections, make under one even a plurality of drive circuit break down the situation of cisco unity malfunction, remaining intact drive circuit still can drive whole LED light source module, guarantees that the LED lighting device can continue illumination.
More than describing is embodiments of the invention only, forgives and can understand, and under the prerequisite that does not depart from the present invention's design, all should be included within the technical conceive of the present invention simple modification of the present invention and replacement.
Claims (10)
1. LED lighting device, comprise driving power and led light source module, it is characterized in that described driving power comprises the drive circuit of at least two parallel connections, the positive pole of led light source module is connected with the positive pole of driving power, and the negative pole of led light source module is connected with the negative pole of driving power.
2. LED lighting device as claimed in claim 1 is characterized in that, also is in series with a diode between described each drive circuit and the led light source module.
3. LED lighting device as claimed in claim 1 is characterized in that, the circuit structure of described each drive circuit is all identical with power.
4. LED lighting device as claimed in claim 1 is characterized in that the power sum of described each drive circuit equals the power of led light source module.
5. LED lighting device as claimed in claim 1 is characterized in that, described drive circuit comprises: a power input; One rectification filtering unit that links to each other with power input; Output unit is changed and delivered to one voltage transformation module that links to each other with rectification filtering unit, the described voltage transformation module voltage after to rectifying and wave-filtering; One output unit that links to each other with voltage transformation module, the output of described output unit links to each other with load LED; One switch element that is connected with voltage transformation module, described switch element are controlled the voltage transitions of described voltage transformation module according to its turn-on and turn-off; The one PFC control module that is connected with switch element, described PFC control module produce a control signal and control periodically turn-on and turn-off of described switch element.
6. LED lighting device as claimed in claim 5, it is characterized in that, described drive circuit comprises that also one decides current control unit with output unit with the constant voltage that the PFC control module is connected, and described constant voltage is decided current control unit and comprised a constant voltage unit and a constant current unit.
7. LED lighting device as claimed in claim 6 is characterized in that, described constant voltage unit comprises a voltage comparator and a voltage stabilizing portion as a reference source, and described voltage stabilizing portion is voltage-stabiliser tube or voltage stabilizing chip.
8. LED lighting device as claimed in claim 5 is characterized in that described constant current unit comprises a current comparator, and the benchmark of described current comparator is taken from the voltage stabilizing portion of described constant voltage unit.
9. LED lighting device as claimed in claim 5 is characterized in that, described led drive circuit also comprises an EMI filter unit, and described EMI filter unit includes a piezo-resistance, and described switch element comprises a triode or FET.
10. as each described LED lighting device among the claim 1-9, it is characterized in that described LED lighting device is LED street lamp, LED Projecting Lamp or LED Tunnel Lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100481590A CN101435565A (en) | 2007-11-13 | 2007-11-13 | LED illuminating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100481590A CN101435565A (en) | 2007-11-13 | 2007-11-13 | LED illuminating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101435565A true CN101435565A (en) | 2009-05-20 |
Family
ID=40710135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100481590A Pending CN101435565A (en) | 2007-11-13 | 2007-11-13 | LED illuminating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101435565A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861000A (en) * | 2010-05-27 | 2010-10-13 | 上海北京大学微电子研究院 | Power supply device for LED illumination modules |
| CN101925222A (en) * | 2010-01-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN102606966A (en) * | 2011-01-25 | 2012-07-25 | 西安翌阳新能源技术工程有限公司 | LED light emitting device |
| CN103096560A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Light-emitted diode (LED) actuator |
| CN103826367A (en) * | 2014-02-26 | 2014-05-28 | 宜兴市宏力灯杆灯具有限公司 | Modularized LED power source |
-
2007
- 2007-11-13 CN CNA2007100481590A patent/CN101435565A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925222A (en) * | 2010-01-12 | 2010-12-22 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN101925222B (en) * | 2010-01-12 | 2013-10-09 | 海洋王照明科技股份有限公司 | Power output circuit for LED driving device |
| CN101861000A (en) * | 2010-05-27 | 2010-10-13 | 上海北京大学微电子研究院 | Power supply device for LED illumination modules |
| CN102606966A (en) * | 2011-01-25 | 2012-07-25 | 西安翌阳新能源技术工程有限公司 | LED light emitting device |
| CN103096560A (en) * | 2011-10-31 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Light-emitted diode (LED) actuator |
| CN103096560B (en) * | 2011-10-31 | 2015-04-15 | 英飞特电子（杭州）股份有限公司 | Light-emitted diode (LED) actuator |
| CN103826367A (en) * | 2014-02-26 | 2014-05-28 | 宜兴市宏力灯杆灯具有限公司 | Modularized LED power source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101262721B (en) | LED driving power | |
| CN201063902Y (en) | LED driving power supply | |
| CN207124784U (en) | A kind of circuit and LED straight lamps for installing detecting module | |
| CN104735873A (en) | Switching circuit and lamp compatible with fluorescent lamp ballast | |
| CN101925214B (en) | LED constant current circuit and method | |
| CN202404873U (en) | Constant voltage and constant current drive circuit of LED display screen | |
| CN101435565A (en) | LED illuminating apparatus | |
| CN102548093A (en) | Direct-current light emitting diode (LED) constant-current driving circuit and LED lamp | |
| CN106102253A (en) | Led drive circuit and led lamp tube | |
| CN201063903Y (en) | LED lighting device | |
| CN103354690A (en) | Auxiliary-winding-free primary side controlled LED (light-emitting diode) driving circuit and PFC (power factor correction) constant-current control circuit thereof | |
| CN101813260B (en) | LED lamp device and PWM (Pulse Width Modulation) direct current supply control circuit | |
| CN201138884Y (en) | LED illuminating apparatus | |
| CN101262722B (en) | LED lighting device | |
| CN202524616U (en) | Off-line constant current driver for high-power LED energy-saving lamp | |
| CN103108435B (en) | Damping circuit, light-emitting diode (LED) driver and LED lighting system | |
| CN201106826Y (en) | LED illumination device | |
| CN100466876C (en) | Intelligent detection controlling device for carrier of multi-power inductive ballast | |
| CN206490855U (en) | A kind of wide pressure power supplies of LED | |
| CN105792436B (en) | The controller and Switching Power Supply of Switching Power Supply | |
| CN108471656A (en) | A kind of light source driving circuit and lighting device | |
| CN102026435B (en) | Light emitting diode driving circuit | |
| CN201496907U (en) | LED street lamp with intelligent temperature control circuit | |
| CN208175063U (en) | A kind of light source driving circuit and lighting device | |
| CN202713762U (en) | U-OUT value self-adjusting drive circuit of electronic ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090520 |