CN103874269A - LED (light emitting diode) control circuit - Google Patents
LED (light emitting diode) control circuit Download PDFInfo
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- CN103874269A CN103874269A CN201210548366.3A CN201210548366A CN103874269A CN 103874269 A CN103874269 A CN 103874269A CN 201210548366 A CN201210548366 A CN 201210548366A CN 103874269 A CN103874269 A CN 103874269A
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Abstract
The invention relates to an LED (light emitting diode) control circuit, which comprises a protection unit, a rectifying filtering unit, a control unit, an LED driving unit, a detection current feedback unit and at least one relay, wherein the LED driving unit is provided with at least one first LED, at least one second LED and a transistor, the detection current feedback unit is arranged between the LED driving unit and the control unit, the relay is correspondingly connected with an alternating current power supply of the protection unit, the first LED, the second LED and the detection current feedback unit, when the alternating current power supply is changed, through starting the relay, the first LED and the second LED are converted from parallel connection into serial connection, the application to different input voltage can be realized, the goal of reducing the cost is reached, in addition, the electromagnetic interference is avoided, and a high-low-voltage compensation effect is realized.
Description
Technical field
The present invention relates to a kind of LED control circuit, refer to especially a kind of different input voltage that is applied in, can fully use the light-emitting diode in circuit, to reach cost-effective object, and without electromagnetic interference and there is the effect of high-low pressure compensation protection.
Background technology
First, refer to shown in Fig. 1, existing LED control circuit is the DC power supply that electric current and power invariability are provided in the mode of flyback circuit 82 and pulse wave width modulation (PWM) 81, and its defect is: the expensive cost that has pulse wave width modulation device and the required part of Electromagnetic interference filter.
Moreover; existing LED control circuit; do not use the protective circuit of high pressure back coupling compensation, if it adopts the mode of linear power supply, although there is no the situation of electromagnetic interference; but along with the voltage of input ac power is higher; transistor cross-pressure on loop is also higher relatively, makes AC supply voltage input too high, causes power (W) fast rise (as shown in Figure 2); therefore cannot protect LED, and easily overheated and cause the damage of LED.
And existing LED control circuit, if drive light-emitting diode with linear power supply, has and be limited in single voltage-operated problem, and cannot allow light-emitting diode make full use of, and causes in the time that the input voltage of AC power is 220V, light-emitting diode can be entirely bright; And in the time that the input voltage of AC power changes 110V into, light-emitting diode can become the half bright or state that do not work, and in order to allow light-emitting diode reach recommended current and power, in the time that the input voltage of AC power is different, just must correspondingly use different LED control circuit, and cannot use at different input voltages, easily slattern thus a large amount of costs.
In view of this, the inventor grinds with great concentration think of, design team's system, and the phase can provide a kind of LED control circuit, can be applicable to different input voltages, reaches cost-effective object, and without electromagnetic interference and there is the effect of high-low pressure compensation protection.
Summary of the invention
Main purpose of the present invention is to overcome the deficiencies in the prior art and defect; a kind of LED control circuit is proposed; it is by corresponding this relay AC power, this first light-emitting diode, this second light-emitting diode and this detecting current back coupling unit that connects this protected location; when the input voltage of AC power changes; by starting this relay; to provide this first light-emitting diode to change into and connect by parallel connection with this second light-emitting diode; can be applicable to different input voltages; can fully use the light-emitting diode in circuit, to reach cost-effective object.
Of the present invention time an object is, proposes a kind of LED control circuit, utilizes transistor to be operated in linear zone, there is no switching frequency, and without the filter that uses electromagnetic interference, makes circuit framework simple, and cost is lower.
Another object of the present invention is to, propose a kind of LED control circuit, there is a detecting current and feedback unit to form protective circuit, can avoid the voltage of AC power to input situation too high and that cause power to rise.
For reaching above-mentioned purpose, the invention provides a kind of LED control circuit, it comprises: a protected location, connects an AC power; One rectification filtering unit, is electrically connected this protected location; One control unit, one end is electrically connected this rectification filtering unit; One LED driver element, is provided with at least one the first light-emitting diode, at least one the second light-emitting diode and a transistor, and this first light-emitting diode has a positive electrode and a negative electrode, and this second light-emitting diode also has a positive electrode and a negative electrode; The positive electrode of this first light-emitting diode is electrically connected this rectification filtering unit and this control unit, and the negative electrode of this second light-emitting diode connects this transistor; One detecting current back coupling unit, be arranged between this LED driver element and this control unit, this detecting current back coupling unit is provided with: one first resistance, one second resistance, one the 3rd resistance and one the 4th resistance, this the first resistance one end is electrically connected respectively this second resistance one end and this control unit, this the first resistance other end is electrically connected the negative electrode of this second light-emitting diode, and this second resistance other end is electrically connected this transistor, the 3rd resistance one end and the 4th resistance one end; And at least one relay, this relay is corresponding to be connected the positive electrode of negative electrode, this second light-emitting diode of AC power, this first light-emitting diode of this protected location and this detecting current and feedbacks unit, and the variation of AC power by corresponding this protected location of sensing of this relay and then start this relay; Thus; in the time that the input voltage of AC power changes 220V into by 110V; by starting this relay; to provide this first light-emitting diode to change into and connect by parallel connection with this second light-emitting diode; can be applicable to different input voltages; can fully use the light-emitting diode in circuit, to reach cost-effective object, and without electromagnetic interference and there is the effect of high-low pressure compensation protection.
In order further to understand feature of the present invention, feature and technology contents, refer to following about detailed description of the present invention and accompanying drawing, appended graphic only provide with reference to and explanation use, non-in order to limit the present invention.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing LED control circuit;
Fig. 2 is the corresponding power output of input voltage (W) the test schematic diagram of existing LED control circuit;
Fig. 3 is the block schematic diagram of LED control circuit of the present invention;
Fig. 4 is LED control circuit schematic diagram of the present invention;
Fig. 5 is the inner block schematic diagram of control unit of the present invention.
Symbol description in figure
10 protected locations
11 fuses
12 thermistors (NTC)
13 piezo-resistances (TVR)
14 the 6th resistance
20 rectification filtering units
21 bridge rectifiers
211 first pins
212 second pins
213 the 3rd pins
214 the 4th pins
22 filter capacitors
30 control units
301 voltage adjusters
302 temperature protection unit
303 Voltage Reference unit
304 operational amplifiers
305 normal phase input ends
306 inverting inputs
307 outputs
311 high voltage ends (HV)
312 low-voltage ends (VDD)
313 earth terminals (GND)
314 gate terminal (GATE)
315 sense terminals (CS)
32 first electric capacity
33 the 5th resistance
40 LED driver elements
41 first light-emitting diodes
411 positive electrodes
412 negative electrodes
42 second light-emitting diodes
421 positive electrodes
422 negative electrodes
43 transistors
431 drain electrode ends
432 gate terminal
433 source terminals
50 detecting currents back coupling unit
51 first resistance
52 second resistance
53 the 3rd resistance
54 the 4th resistance
60 relays
601 first pins
602 second pins
603 the 3rd pins
604 the 4th pins
605 the 5th pins
606 the 6th pins
607 the 7th pins
608 the 8th pins
609 the 9th pins
610 the tenth pins
611 the 11 pins
70 AC power
71 live wire ends (L)
72 ground terminals (N)
81 pulse width modulations (PWM)
82 flyback circuit
Embodiment
Shown in Fig. 3～5, the present invention is a kind of LED control circuit, and it comprises: a protected location 10, connects an AC power 70; One rectification filtering unit 20, is electrically connected this protected location 10; One control unit 30, one end is electrically connected this rectification filtering unit 20; One LED driver element 40, be provided with at least one the first light-emitting diode 41, at least one the second light-emitting diode 42 and a transistor 43, this first light-emitting diode 41 has a positive electrode 411 and a negative electrode 412, and this second light-emitting diode 42 also has a positive electrode 421 and a negative electrode 422, the positive electrode 411 of this first light-emitting diode 41 is electrically connected this rectification filtering unit 20 and this control unit 30, and the negative electrode of this second light-emitting diode connects this transistor 43; One detecting current back coupling unit 50, be arranged between this LED driver element 40 and this control unit 30, this detecting current back coupling unit 50 is provided with: one first resistance 51, one second resistance 52, one the 3rd resistance 53 and one the 4th resistance 54, these the first resistance 51 one end are electrically connected respectively this second resistance 52 one end and this control unit 30, these the first resistance 51 other ends are electrically connected the negative electrode 422 of this second light-emitting diode 42, and these the second resistance 52 other ends are electrically connected this transistor 43, the 3rd resistance 53 one end and the 4th resistance 54 one end; And at least one relay 60, this relay 60 is corresponding to be connected the positive electrode 421 of negative electrode 412, this second light-emitting diode 42 of AC power 70, this first light-emitting diode 41 of these protected locations 10 and this detecting current and feedbacks unit 50, and the variation of AC power 70 by this protected location 10 of the corresponding sensing of this relay 60 and then start this relay 60; In the time that the input voltage of AC power 70 changes, by starting this relay 60, to provide this first light-emitting diode 41 to change into and connect by parallel connection with this second light-emitting diode 42, can be applicable to different input voltages, can fully use the light-emitting diode in circuit, to reach cost-effective object.
Wherein this at least one relay 60 includes: one first pin 601, one second pin 602, one the 3rd pin 603, one the 4th pin 604, one the 5th pin 605, one the 6th pin 606, one the 7th pin 607, one the 8th pin 608, one the 9th pin 609,1 the tenth pin 610 and 1 the 11 pin 611, this first pin 601 connects the 3rd resistance 53 other ends, this second pin 602 connects the 4th resistance 54 other ends, the 3rd pin 603 ground connection, the 4th pin 604 connects the positive electrode 421 of this second light-emitting diode 42, the 5th pin 605 connects the 8th pin 608, the 6th pin 606 connects the positive electrode 411 of this first light-emitting diode 41 and this second light-emitting diode 42, 421, the 7th pin 607 connects negative electrode 422 and this transistor 43 of this second light-emitting diode 42, the 9th pin 610 connects the negative electrode 412 of this first light-emitting diode 41, the tenth pin the 610 and the 11 pin 611 connects this AC power 70.
In the time that the input voltage of AC power 70 is 110V, this at least one relay 60 does not start, make the 3rd pin 603 and these the first pin 601 conductings, the 6th pin 606 and the 4th pin 604 conductings, the 9th pin 609 and the 7th pin 607 conductings, to form in parallel by this first light-emitting diode 41 with this second light-emitting diode 42.
In the time that the input voltage of AC power 70 is 220V, this at least one relay 60 starts, make the 3rd pin 603 and these the second pin 602 conductings, the 6th pin 606 and the 5th pin 605 conductings, the 9th pin 609 and the 8th pin 608 conductings, to form this first light-emitting diode 41 to connect with this second light-emitting diode 42.
Thus, LED control circuit of the present invention, utilize at least one relay 60 to connect at least one the first light-emitting diode 41 and at least one the second light-emitting diode 42, to solve linear power supply in single voltage-operated problem, and allow light-emitting diode reach to make full use of, and judge that according to the input voltage of AC power 70 this at least one first light-emitting diode 41 and this at least one the second light-emitting diode 42 are serial or parallel connection, and reach recommended current and power.In the time that the input voltage of AC power changes, by starting this relay 60, to provide this first light-emitting diode 41 to change into and connect by parallel connection with this second light-emitting diode 42, can be applicable to different input voltages, fully use the light-emitting diode in circuit simultaneously, to reach cost-effective object, and allow light-emitting diode reach recommended current and power.
And above-mentioned input voltage can be for changing by 110V that 220V, 220V change 110V into into or between 110V ~ 220V, the variation by input voltage is to start this relay 60.
Wherein, this control unit 30 comprises: a voltage adjuster 301, a Voltage Reference unit 303, an operational amplifier 304 and a temperature protection unit 302, and this control unit 30 has a high voltage end (HV) 311, a low-voltage end (VDD) 312, a sense terminal (CS) 315, an earth terminal (GND) 313 and a gate terminal (GATE) 314 again; These voltage adjuster 301 one end connect this high voltage end (HV) 311; these voltage adjuster 301 other ends connect this low-voltage end (VDD) 312; this operational amplifier 304 has a normal phase input end 305, an inverting input 306 and an output 307; this normal phase input end 305 connects this Voltage Reference unit 303; this inverting input 306 connects this sense terminal (CS) 315, and this output 307 connects this temperature protection unit 302 and this gate terminal (GATE) 314.Again, the gate terminal (GATE) 314 of this control unit 30 is electrically connected the transistor 43 of this LED driver element 40, this high voltage end (HV) 311 is electrically connected this rectification filtering unit 20 via one the 5th resistance 33, between this low-voltage end (VDD) 312 and this earth terminal 313, be connected one first electric capacity 32, this sense terminal (CS) 315 is electrically connected one end of this first resistance 51 and this second resistance 52.By the 5th resistance 33, in order to control high voltage startup current limliting, and this first electric capacity 32 is to provide filtering noise.
Moreover, the transistor 43 of this LED driver element has a drain electrode end 431, a gate terminal 432 and one source pole end 433, the gate terminal 432 of this transistor 43 connects the gate terminal (GATE) 314 of this control unit 30, this drain electrode end 431 connects negative electrode 422 and this relay 60 of this second light-emitting diode 42, and this source terminal 433 connects one end of the other end and the 3rd resistance 53 and the 4th resistance 54 of the second resistance 52.Wherein this transistor 43 is a metal oxide layer semiconductor field-effect transistor (MOSFET), by this control unit 30 and this detecting current back coupling unit 50, make this transistor 43 operate in linear zone, and by this transistorized pyrotoxin and LED lamp plate (figure does not disclose) in conjunction with so that heat radiation to be provided.
Wherein, this protected location 10 comprises: a fuse 11, a thermistor (NTC) 12 and a piezo-resistance (TVR) 13; this AC power 70 has a live wire end (L) 71 and a ground terminal (N) 72 again; these fuse 11 one end connect the live wire end 71 of this AC power 70; these fuse 11 other ends connect one end of this thermistor (NTC) 12 and this piezo-resistance (TVR) 13, and this piezo-resistance (TVR) 13 other ends connect ground terminal (N) 72 and this rectification filtering unit 20 of this AC power 70 again.Thus, this fuse 11 is in order to short-circuit protection to be provided, and this thermistor (NTC) 12 provides protects the electric current of surging, and this piezo-resistance (TVR) 13 provides protection surge voltage.
Again, this rectification filtering unit 20 comprises: a bridge rectifier 21 and a filter capacitor 22, and this bridge rectifier 21 has one first pin 211, one second pin 212, one the 3rd pin 213 and one the 4th pin 214 again; This first pin 211 connects the other end of the thermistor (NTC) 12 of this protected location 10 with one the 6th resistance 14; these the second pin 212 ground connection; the 3rd pin 213 connects ground terminal (N) 72 and this piezo-resistance (TVR) 13 other ends of this AC power, and the 4th pin 214 is electrically connected this at least one filter capacitor 22, this control unit 30 and this LED driver element 40.Thus, carry out rectification by the corresponding AC power 70 of this bridge rectifier 21, and utilize this filter capacitor 22 to carry out filter away high frequency noise, and the 6th resistance 14 can provide the Modulating Power factor.
In addition; the detecting current back coupling unit 50 of LED control circuit of the present invention; can provide detecting current to feedback and high-low pressure compensation protection; when AC power 70 input voltages are when lower; transistor 43 cross-pressures are also lower relatively; utilize the first resistance 51 and the second resistance 52 to remove to detect the cross-pressure on transistor 43; feedback voltage Δ V is also lower relatively; and the voltage that the 3rd resistance 53 the 4th resistance 54 in parallel is detected is also lower; can be by the output current of this first light-emitting diode 41 and this second light-emitting diode 42 toward declining, to form protective circuit.
In the time that the input voltage of AC power 70 is higher; relative transistor 43 cross-pressures are also higher; utilize the first resistance 51 and the second resistance 52 to remove to detect the cross-pressure on transistor 43; feedback voltage Δ V is also higher relatively; add that the 3rd resistance 53 the 4th resistance 54 in parallel dividing potential drop above can be by the output current of this first light-emitting diode 41 and this second light-emitting diode 42 toward declining; to form protective circuit, can avoid AC supply voltage to input too high and cause power (W) to rise.
Feature of the present invention:
1. LED control circuit of the present invention, utilize at least one relay to connect at least one the first light-emitting diode and at least one the second light-emitting diode, when the input voltage of AC power changes, by starting this relay, to provide this first light-emitting diode to change into and connect by parallel connection with this second light-emitting diode, can be applicable to different input voltages, fully use the light-emitting diode in circuit, to reach cost-effective object simultaneously.
2. LED control circuit of the present invention, selects to switch this at least one first light-emitting diode and this at least one the second light-emitting diode is serial or parallel connection according to the input voltage of AC power, and allows light-emitting diode reach recommended current and power.
3. LED control circuit of the present invention uses linear power supply, owing to not being the mode of pulse width modulation (PWM), and without the problem of electromagnetic interference (EMI).
4. LED control circuit of the present invention does not have electromagnetic interference (EMI), can reduce safety cost of parts.
5. the detecting current of LED control circuit of the present invention back coupling unit; can provide detecting current to feedback and low-voltage compensation protection; in the time that input ac power voltage is lower; transistor cross-pressure is also lower relatively; utilize the first resistance and the second resistance to remove to detect the cross-pressure on transistor, feedback voltage Δ V is also lower relatively, and the voltage that the 3rd resistance the 4th resistance in parallel is detected is also lower; can be by the output current of this first light-emitting diode and this second light-emitting diode toward declining, to form protective circuit.
6. the detecting current of LED control circuit of the present invention back coupling unit; can provide detecting current to feedback and high pressure compensation protection; in the time that the input voltage of AC power is higher; transistor cross-pressure is also higher relatively; utilize the first resistance and the second resistance to remove to detect the cross-pressure on transistor; feedback voltage Δ V is also higher relatively; add that the dividing potential drop of the 3rd resistance the in parallel the 4th above resistance can be by this first light-emitting diode and the past decline of this second light-emitting diode output current; to form protective circuit, can avoid AC supply voltage to input too high and cause power (W) to rise.
The foregoing is only better possible embodiments of the present invention, non-ly therefore limit to the scope of the claims of the present invention, such as use specification of the present invention and accompanying drawing content institute for it equivalent structure change, all reason is with being contained in scope of the present invention.
Claims (9)
1. a LED control circuit, is characterized in that, comprising:
One protected location, connects an AC power;
One rectification filtering unit, is electrically connected this protected location;
One control unit, one end is electrically connected this rectification filtering unit;
One LED driver element, is provided with at least one the first light-emitting diode, at least one the second light-emitting diode and a transistor, and this first light-emitting diode has a positive electrode and a negative electrode, and this second light-emitting diode also has a positive electrode and a negative electrode; The positive electrode of this first light-emitting diode is electrically connected this rectification filtering unit and this control unit, and the negative electrode of this second light-emitting diode connects this transistor;
One detecting current back coupling unit, be arranged between this LED driver element and this control unit, this detecting current back coupling unit is provided with: one first resistance, one second resistance, one the 3rd resistance and one the 4th resistance, this the first resistance one end is electrically connected respectively this second resistance one end and this control unit, this the first resistance other end is electrically connected the negative electrode of this second light-emitting diode, and this second resistance other end is electrically connected this transistor, the 3rd resistance one end and the 4th resistance one end; And
At least one relay, this relay is corresponding to be connected the positive electrode of negative electrode, this second light-emitting diode of AC power, this first light-emitting diode of this protected location and this detecting current and feedbacks unit, and with the variation of the AC power of corresponding this protected location of sensing of this relay and then start this relay; In the time that this relay starts, to provide this first light-emitting diode to change into and connect by parallel connection with this second light-emitting diode.
2. LED control circuit as claimed in claim 1, wherein, this control unit comprises: a voltage adjuster, a Voltage Reference unit, an operational amplifier and a temperature protection unit, and this control unit has a high voltage end, a low-voltage end, a sense terminal, an earth terminal and a gate terminal again; This voltage adjuster one end connects this high voltage end; this voltage adjuster other end connects this low-voltage end; this operational amplifier has a normal phase input end, an inverting input and an output; this normal phase input end connects this Voltage Reference unit; this inverting input connects this sense terminal, and this output connects this temperature protection unit and this gate terminal.
3. LED control circuit as claimed in claim 2, wherein, the gate terminal of this control unit is electrically connected the transistor of this LED driver element, this high voltage end is electrically connected this rectification filtering unit via one the 5th resistance, between the low-voltage end of this control unit and this earth terminal, be connected one first electric capacity, this sense terminal is electrically connected one end of this first resistance and this second resistance.
4. LED control circuit as claimed in claim 3, wherein, the transistor of this LED driver element has a drain electrode end, a gate terminal and one source pole end, this transistorized gate terminal connects the gate terminal of this control unit, this drain electrode end connects negative electrode and this relay of this second light-emitting diode, and this source terminal connects one end of the other end and the 3rd resistance and the 4th resistance of the second resistance.
5. LED control circuit as claimed in claim 1; wherein; this protected location comprises: a fuse, a thermistor and a piezo-resistance; this AC power has a live wire end and a ground terminal again; this fuse one end connects the live wire end of this AC power; this fuse other end connects one end of this thermistor and this piezo-resistance, and this piezo-resistance other end connects ground wire and this rectification filtering unit of this AC power again.
6. LED control circuit as claimed in claim 5, wherein, this rectification filtering unit comprises: a bridge rectifier and at least one filter capacitor, this bridge rectifier has one first pin, one second pin, one the 3rd pin and one the 4th pin again; This first pin connects the other end of the thermistor of this protected location with one the 6th resistance; this the second pin ground connection; the 3rd pin connects ground terminal and this piezo-resistance other end of this AC power, and the 4th pin is electrically connected this at least one filter capacitor, this control unit and this LED driver element.
7. LED control circuit as claimed in claim 1, wherein, this at least one relay pack contains: one first pin, one second pin, one the 3rd pin, one the 4th pin, one the 5th pin, one the 6th pin, one the 7th pin, one the 8th pin, one the 9th pin, 1 the tenth pin and 1 the 11 pin; This first pin connects the 3rd resistance other end, this second pin connects the 4th resistance other end, the 3rd pin ground connection, the 4th pin connects the positive electrode of this second light-emitting diode, the 5th pin connects the 8th pin, the 6th pin connects the positive electrode of this first light-emitting diode and this second light-emitting diode, the 7th pin connects negative electrode and this transistor of this second light-emitting diode, the 9th pin connects the negative electrode of this first light-emitting diode, and the tenth pin and the 11 pin connect this AC power.
8. LED control circuit as claimed in claim 7, wherein, when this at least one relay does not start, the 3rd pin and this first pin conducting, the 6th pin and the 4th pin conducting, the 9th pin and the 7th pin conducting, to form in parallel by this first light-emitting diode with this second light-emitting diode.
9. LED control circuit as claimed in claim 7, wherein, when this at least one relay starts, the 3rd pin and this second pin conducting, the 6th pin and the 5th pin conducting, the 9th pin and the 8th pin conducting, to form this first light-emitting diode to connect with this second light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548366.3A CN103874269B (en) | 2012-12-17 | 2012-12-17 | Led control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548366.3A CN103874269B (en) | 2012-12-17 | 2012-12-17 | Led control circuit |
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| Publication Number | Publication Date |
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| CN103874269A true CN103874269A (en) | 2014-06-18 |
| CN103874269B CN103874269B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210548366.3A Expired - Fee Related CN103874269B (en) | 2012-12-17 | 2012-12-17 | Led control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281311A (en) * | 2014-07-16 | 2016-01-27 | 明纬(广州)电子有限公司 | LED power supplying device with lightning stroke prevention function |
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| JP2009283839A (en) * | 2008-05-26 | 2009-12-03 | Panasonic Electric Works Co Ltd | Light emitting diode driving device and illuminator |
| US20110037387A1 (en) * | 2007-09-25 | 2011-02-17 | Enertron, Inc. | Dimmable LED Bulb With Convection Cooling |
| US20110115399A1 (en) * | 2009-05-09 | 2011-05-19 | Innosys, Inc. | Universal Dimmer |
| US20110248647A1 (en) * | 2010-04-08 | 2011-10-13 | Akinori Hiramatu | Lighting device and light fixture using lighting device |
| CN102595696A (en) * | 2011-01-05 | 2012-07-18 | 松下电器产业株式会社 | Semiconductor light-emitting element lighting device and illumination fixture using the same |
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2012
- 2012-12-17 CN CN201210548366.3A patent/CN103874269B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110037387A1 (en) * | 2007-09-25 | 2011-02-17 | Enertron, Inc. | Dimmable LED Bulb With Convection Cooling |
| JP2009283839A (en) * | 2008-05-26 | 2009-12-03 | Panasonic Electric Works Co Ltd | Light emitting diode driving device and illuminator |
| US20110115399A1 (en) * | 2009-05-09 | 2011-05-19 | Innosys, Inc. | Universal Dimmer |
| US20110248647A1 (en) * | 2010-04-08 | 2011-10-13 | Akinori Hiramatu | Lighting device and light fixture using lighting device |
| CN102595696A (en) * | 2011-01-05 | 2012-07-18 | 松下电器产业株式会社 | Semiconductor light-emitting element lighting device and illumination fixture using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281311A (en) * | 2014-07-16 | 2016-01-27 | 明纬(广州)电子有限公司 | LED power supplying device with lightning stroke prevention function |
| CN105281311B (en) * | 2014-07-16 | 2018-04-20 | 明纬(广州)电子有限公司 | There is the LED power feeding mechanism of lightning strike protection |
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| CN103874269B (en) | 2016-04-13 |
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Granted publication date: 20160413 Termination date: 20211217 |