CN103874269B - Led control circuit - Google Patents
Led control circuit Download PDFInfo
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- CN103874269B CN103874269B CN201210548366.3A CN201210548366A CN103874269B CN 103874269 B CN103874269 B CN 103874269B CN 201210548366 A CN201210548366 A CN 201210548366A CN 103874269 B CN103874269 B CN 103874269B
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Abstract
The present invention relates to a kind of LED control circuit, it comprises: a protected location, a rectification filtering unit, a control unit and a LED drive unit; This LED drive unit is provided with at least one first light-emitting diode, at least one second light-emitting diode and a transistor; One detecting current feedback unit, is arranged between this LED drive unit and this control unit; And at least one relay; this relay correspondence connects the AC power of this protected location, this first light-emitting diode, this second light-emitting diode and this detecting current feedback unit; when AC power changes; by starting this relay; connect so that this first light-emitting diode and this second light-emitting diode are changed into by parallel connection; namely can be applicable to different input voltages, reach cost-effective object, and without electromagnetic interference and the effect with high-low pressure compensation protection.
Description
Technical field
The present invention relates to a kind of LED control circuit, refer to especially and be a kind ofly applied in different input voltages, fully can use the light-emitting diode in circuit, to reach cost-effective object, and without electromagnetic interference and have the effect that high-low pressure compensates protection.
Background technology
First, refer to shown in Fig. 1, existing LED control circuit is that its defect is: the expensive cost having part needed for pulse wave width modulation device and Electromagnetic interference filter in the mode of flyback circuit 82 and pulse wave width modulation (PWM) 81 to provide the DC power supply of electric current and power invariability.
Moreover; existing LED control circuit; do not use the protective circuit that high pressure back coupling compensates, 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 relative loop is also higher, AC supply voltage is inputted too high, causes power (W) to rise (as shown in Figure 2) fast; therefore LED cannot be protected, and easily overheated and cause the damage of LED.
And, existing LED control circuit, if use linear power supply to drive light-emitting diode, have and be limited in single voltage-operated problem, and light-emitting diode cannot be allowed to make full use of, cause when the input voltage of AC power is 220V, light-emitting diode can be entirely bright; And when the input voltage of AC power changes 110V into, light-emitting diode then can become the half bright or state that do not work, and in order to allow light-emitting diode reach recommended current and power, when the input voltage of AC power is different, just correspondingly must use different LED control circuit, and cannot use at different input voltages, easily slattern a large amount of costs thus.
In view of this, the present 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 the effect with 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 the AC power of this this protected location of relay correspondence connection, this first light-emitting diode, this second light-emitting diode and this detecting current feedback unit; when the input voltage of AC power changes; by starting this relay; to be changed into by parallel connection to provide this first light-emitting diode and this second light-emitting diode and connect; namely can be applicable to different input voltages; fully can 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 in linear zone, do not have switching frequency, and without the need to using the filter of 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 feedback unit to form protective circuit, the voltage of AC power can be avoided to input the too high and situation that causes 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, comprise: a voltage adjuster, a voltage reference unit, an operational amplifier and a temperature protection unit, 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, one LED drive unit, be provided with at least one first light-emitting diode, at least one second light-emitting diode and a transistor, 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 feedback unit, be arranged between this LED drive unit and this control unit, this detecting current feedback 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 this second resistance one end and this control unit respectively, 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 correspondence connects the AC power of this protected location, the negative electrode of this first light-emitting diode, the positive electrode of this second light-emitting diode and this detecting current feedback unit, and sense the change of the AC power of this protected location by this relay correspondence and then start this relay, this at least one relay includes: 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, 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, 3rd pin ground connection, 4th pin connects the positive electrode of this second light-emitting diode, 5th pin connects the 8th pin, 6th pin connects the positive electrode of this first light-emitting diode and this second light-emitting diode, 7th pin connects negative electrode and this transistor of this second light-emitting diode, 9th pin connects the negative electrode of this first light-emitting diode, and the tenth pin and the 11 pin connect this AC power, 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 be formed in parallel by this first light-emitting diode with this second light-emitting diode, 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, connect to be formed with this second light-emitting diode by this first light-emitting diode, wherein, the gate terminal of this control unit is electrically connected the transistor of this LED drive unit, this high voltage end is electrically connected this rectification filtering unit via one the 5th resistance, the low-voltage end of this control unit be connected one first electric capacity between this earth terminal, this sense terminal is electrically connected one end of this first resistance and this second resistance, wherein, the transistor of this LED drive unit has a drain electrode end, a gate terminal and one source pole end, the gate terminal of this transistor 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 the other end of the second resistance and one end of the 3rd resistance and the 4th resistance, thus, when the input voltage of AC power changes 220V into by 110V, by starting this relay, to be changed into by parallel connection to provide this first light-emitting diode and this second light-emitting diode and connect, namely can be applicable to different input voltages, fully can use the light-emitting diode in circuit, to reach cost-effective object, and without electromagnetic interference and the effect with high-low pressure compensation protection.
In order to further understand feature of the present invention, feature and technology contents, refer to following detailed description for the present invention and accompanying drawing, institute's accompanying drawings only provides reference and explanation use, is not used to limit the present invention.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of existing LED control circuit;
Fig. 2 is that the corresponding power output (W) of input voltage of existing LED control circuit tests schematic diagram;
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
40LED driver element
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 current feedback 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 drive unit 40, be provided with at least one first light-emitting diode 41, at least one second light-emitting diode 42 and transistor 43, this first light-emitting diode 41 has positive electrode 411 and a negative electrode 412, and this second light-emitting diode 42 also has 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 feedback unit 50, be arranged between this LED drive unit 40 and this control unit 30, this detecting current feedback unit 50 is provided with: one first resistance 51,1 second resistance 52,1 the 3rd resistance 53 and one the 4th resistance 54, this the first resistance 51 one end is electrically connected this second resistance 52 one end and this control unit 30 respectively, this the first resistance 51 other end is electrically connected the negative electrode 422 of this second light-emitting diode 42, and this second resistance 52 other end is 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 correspondence connects the AC power 70 of this protected location 10, the negative electrode 412 of this first light-emitting diode 41, the positive electrode 421 of this second light-emitting diode 42 and this detecting current feedback unit 50, and by the change of the AC power 70 of this this protected location 10 of relay 60 correspondence sensing and then start this relay 60; When the input voltage of AC power 70 changes, by starting this relay 60, to be changed into by parallel connection to provide this first light-emitting diode 41 and this second light-emitting diode 42 and connect, namely can be applicable to different input voltages, fully can use the light-emitting diode in circuit, to reach cost-effective object.
Wherein this at least one relay 60 includes: one first pin 601,1 second pin 602, the 3rd pin 603, the 4th pin 604, the 5th pin 605, the 6th pin 606, the 7th pin 607, the 8th pin 608, the 9th pin 609, the tenth pin 610 and 1 the 11 pin 611, this first pin 601 connects the 3rd resistance 53 other end, this second pin 602 connects the 4th resistance 54 other end, 3rd pin 603 ground connection, 4th pin 604 connects the positive electrode 421 of this second light-emitting diode 42, 5th pin 605 connects the 8th pin 608, 6th pin 606 connects the positive electrode 411 of this first light-emitting diode 41 and this second light-emitting diode 42, 421, 7th pin 607 connects negative electrode 422 and this transistor 43 of this second light-emitting diode 42, 9th pin 610 connects the negative electrode 412 of this first light-emitting diode 41, tenth pin the 610 and the 11 pin 611 connects this AC power 70.
When the input voltage of AC power 70 is 110V, then this at least one relay 60 does not start, make the 3rd pin 603 and this first pin 601 conducting, 6th pin 606 and the 4th pin 604 conducting, 9th pin 609 and the 7th pin 607 conducting, to be formed in parallel by this first light-emitting diode 41 with this second light-emitting diode 42.
When the input voltage of AC power 70 is 220V, then this at least one relay 60 starts, make the 3rd pin 603 and this second pin 602 conducting, 6th pin 606 and the 5th pin 605 conducting, 9th pin 609 and the 8th pin 608 conducting, connect to be formed with this second light-emitting diode 42 by this first light-emitting diode 41.
Thus, LED control circuit of the present invention, at least one relay 60 is utilized to connect at least one first light-emitting diode 41 and at least one 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 this at least one first light-emitting diode 41 and this at least one second light-emitting diode 42 are as serial or parallel connection according to the input voltage of AC power 70, and reach recommended current and power.When the input voltage of AC power changes, by starting this relay 60, to be changed into by parallel connection to provide this first light-emitting diode 41 and this second light-emitting diode 42 and connect, namely can be applicable to different input voltages, fully use the light-emitting diode in circuit simultaneously, to reach cost-effective object, and light-emitting diode is allowed to reach recommended current and power.
And above-mentioned input voltage can change 110V into or between 110V ~ 220V for changing 220V, 220V into by 110V, by the change of input voltage to start this relay 60.
Wherein, this control unit 30 comprises: voltage adjuster 301, voltage reference unit 303, operational amplifier 304 and a temperature protection unit 302, and this control unit 30 has a high voltage end (HV) 311, low-voltage end (VDD) 312, sense terminal (CS) 315, earth terminal (GND) 313 and a gate terminal (GATE) 314 again; This voltage adjuster 301 one end connects this high voltage end (HV) 311; this voltage adjuster 301 other end connects this low-voltage end (VDD) 312; this operational amplifier 304 has normal phase input end 305, 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 drive unit 40, this high voltage end (HV) 311 is electrically connected this rectification filtering unit 20 via one the 5th resistance 33, be connected one first electric capacity 32 between this low-voltage end (VDD) 312 with this earth terminal 313, 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 drive unit has drain electrode end 431, gate terminal 432 and an 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 the other end of the second resistance 52 and one end of the 3rd resistance 53 and the 4th resistance 54.Wherein this transistor 43 is a metal oxide layer semiconductor field-effect transistor (MOSFET), by this control unit 30 and this detecting current feedback unit 50, make this transistor 43 operate in linear zone, and the pyrotoxin of this transistor and LED lamp panel (scheming not disclose) are combined to provide heat radiation.
Wherein, this protected location 10 comprises: a fuse 11, 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; this fuse 11 one end connects the live wire end 71 of this AC power 70; this fuse 11 other end connects one end of this thermistor (NTC) 12 and this piezo-resistance (TVR) 13, and this piezo-resistance (TVR) 13 other end connects ground terminal (N) 72 and this rectification filtering unit 20 of this AC power 70 again.Thus, this fuse 11 is in order to provide short-circuit protection, and this thermistor (NTC) 12 provides protection to surge electric current, and this piezo-resistance (TVR) 13 provides protection surge voltage.
Again, this rectification filtering unit 20 comprises: bridge rectifier 21 and a filter capacitor 22, and this bridge rectifier 21 has one first pin 211,1 second pin 212, 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; this the second pin 212 ground connection; 3rd pin 213 connects ground terminal (N) 72 and this piezo-resistance (TVR) 13 other end 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 drive unit 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 feedback unit 50 of LED control circuit of the present invention; detecting current can be provided to feedback and high-low pressure compensation protection; when AC power 70 input voltage is lower; opposing transistor 43 cross-pressure is also lower; the first resistance 51 and the second resistance 52 is utilized to go to detect the cross-pressure on transistor 43; relative feedback voltage Δ V is also lower; and the voltage that the 3rd resistance 53 the 4th resistance 54 in parallel is detected is also lower; understand the past decline of output current by this first light-emitting diode 41 and this second light-emitting diode 42, to form protective circuit.
When the input voltage of AC power 70 is higher; relative transistor 43 cross-pressure is also higher; the first resistance 51 and the second resistance 52 is utilized to go to detect the cross-pressure on transistor 43; relative feedback voltage Δ V is also higher; add that dividing potential drop above the 3rd resistance 53 4th resistance 54 in parallel can by the output current of this first light-emitting diode 41 and this second light-emitting diode 42 toward declining; to form protective circuit, AC supply voltage can be avoided to input too high and cause power (W) to rise.
Feature of the present invention:
1. LED control circuit of the present invention, at least one relay is utilized to connect at least one first light-emitting diode and at least one second light-emitting diode, when the input voltage of AC power changes, by starting this relay, to be changed into by parallel connection to provide this first light-emitting diode and this second light-emitting diode and connect, namely 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 according to the input voltage of AC power and this at least one second light-emitting diode is serial or parallel connection, 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 feedback unit of LED control circuit of the present invention; detecting current can be provided to feedback and low-voltage compensation protection; when input ac power voltage is lower; opposing transistor cross-pressure is also lower; utilize the first resistance and the second resistance to go to detect the cross-pressure on transistor, relative feedback voltage Δ V is also lower, and the voltage that the 3rd resistor coupled in parallel the 4th resistance is detected is also lower; understand the past decline of output current by this first light-emitting diode and this second light-emitting diode, to form protective circuit.
6. the detecting current feedback unit of LED control circuit of the present invention; detecting current can be provided to feedback and high pressure compensation protection; when the input voltage of AC power is higher; opposing transistor cross-pressure is also higher; the first resistance and the second resistance is utilized to go to detect the cross-pressure on transistor; relative feedback voltage Δ V is also higher; add that the dividing potential drop above the 3rd resistor coupled in parallel the 4th resistance can by this first light-emitting diode and the past decline of this second light-emitting diode output current; to form protective circuit, AC supply voltage can be avoided to input too high and cause power (W) to rise.
The foregoing is only better possible embodiments of the present invention, non-ly therefore namely limit to the scope of the claims of the present invention, such as use specification of the present invention and the equivalent structure change for it of accompanying drawing content institute, all reason is with being included within the scope of the present invention.
Claims (3)
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, comprising:
One voltage adjuster, a voltage reference unit, an operational amplifier and a temperature protection unit, 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;
One LED drive unit, be provided with at least one first light-emitting diode, at least one second light-emitting diode and a transistor, 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 feedback unit, be arranged between this LED drive unit and this control unit, this detecting current feedback 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 this second resistance one end and this control unit respectively, 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 correspondence connects the AC power of this protected location, the negative electrode of this first light-emitting diode, the positive electrode of this second light-emitting diode and this detecting current feedback unit, and with the change of the AC power of this this protected location of relay correspondence sensing and then start this relay; When this relay starts, to be changed into by parallel connection to provide this first light-emitting diode and this second light-emitting diode and connect, this at least one relay includes: 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, 3rd pin ground connection, 4th pin connects the positive electrode of this second light-emitting diode, 5th pin connects the 8th pin, 6th pin connects the positive electrode of this first light-emitting diode and this second light-emitting diode, 7th pin connects negative electrode and this transistor of this second light-emitting diode, 9th pin connects the negative electrode of this first light-emitting diode, and the tenth pin and the 11 pin connect this AC power; 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 be formed in parallel by this first light-emitting diode with this second light-emitting diode; 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, connect to be formed with this second light-emitting diode by this first light-emitting diode;
Wherein, the gate terminal of this control unit is electrically connected the transistor of this LED drive unit, this high voltage end is electrically connected this rectification filtering unit via one the 5th resistance, the low-voltage end of this control unit be connected one first electric capacity between this earth terminal, this sense terminal is electrically connected one end of this first resistance and this second resistance;
Wherein, the transistor of this LED drive unit has a drain electrode end, a gate terminal and one source pole end, the gate terminal of this transistor 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 the other end of the second resistance and one end of the 3rd resistance and the 4th resistance.
2. 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.
3. LED control circuit as claimed in claim 2, wherein, this rectification filtering unit comprises: a bridge rectifier and at least one filter capacitor, and 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; 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 drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548366.3A CN103874269B (en) | 2012-12-17 | 2012-12-17 | Led control circuit |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN103874269A CN103874269A (en) | 2014-06-18 |
| CN103874269B true CN103874269B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210548366.3A Expired - Fee Related CN103874269B (en) | 2012-12-17 | 2012-12-17 | Led control circuit |
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| CN (1) | CN103874269B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009283839A (en) * | 2008-05-26 | 2009-12-03 | Panasonic Electric Works Co Ltd | Light emitting diode driving device and illuminator |
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2012
- 2012-12-17 CN CN201210548366.3A patent/CN103874269B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN103874269A (en) | 2014-06-18 |
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