CN103124456B - LED lamp device - Google Patents
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- CN103124456B CN103124456B CN201210464565.6A CN201210464565A CN103124456B CN 103124456 B CN103124456 B CN 103124456B CN 201210464565 A CN201210464565 A CN 201210464565A CN 103124456 B CN103124456 B CN 103124456B
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- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 4
- 230000002457 bidirectional effect Effects 0.000 description 37
- 238000005286 illumination Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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Abstract
The invention provides a kind of LED lamp device, the stably action of the dimmer of phase control mode can be made and suppress flicker, and efficiency is high.This LED lamp device possesses the rectification circuit by being converted to commutating voltage by the AC supply voltage of phase control; To export with the direct current of described rectification circuit via diode and be connected, make described commutating voltage smoothly and generate the capacitor of direct voltage; Change described direct voltage and the DC-DC change-over circuit that the LED load of the following LED of being designated as is powered; With the current setting circuit of current setting value exporting described DC-DC change-over circuit according to described commutating voltage, be configured to possess and export with the direct current of described rectification circuit the variable resistance circuit be connected; With the resistance value initialization circuit of resistance value changing described variable resistance circuit according to described commutating voltage, described resistance value initialization circuit, when described commutating voltage is than required reference voltage height, increases the resistance value of described variable resistance circuit.
Description
Technical field
The present invention relates to LED lamp device.
Background technology
LED receives publicity as Environmental outstanding light source, is used for the general lighting of dwellings and office as LED illumination.In LED illumination, exist and possess the joint same with incandescent lamp bulb, be arranged on the bulb-shaped LED illumination that the utensil of incandescent lamp bulb uses, also occurred the product corresponding with the dimmer of the phase control mode of the dimming unit being used as incandescent lamp bulb (note by abridging below and make dimmer).
Dimmer is mostly by as the conducting of the bidirectional thyristor (TRIAC:TriodeACSemiconductorSwitch) of semiconductor element, shutoff and make conducting between AC power and load, cut-out.TRIAC, after conducting (scratch start), if flowed continuously through than being called the electric current that the current value of the regulation keeping electric current is large, then turns off (extinguishing arc) again.Dimmer is design premised on incandescent lamp bulb mainly with load greatly.If load is incandescent lamp bulb, then from moment of bidirectional thyristor conducting to the moment near AC power zero crossing, all flow through the enough electric currents exceeding and keep electric current, bidirectional thyristor maintains on-state.But, load is in the LED illumination of LED, electric current is little compared with incandescent lamp bulb, so the enough electric currents exceeding and keep electric current can not be flow through to the moment near AC power zero crossing from the moment of bidirectional thyristor conducting, the phenomenon that before occurring near AC power zero crossing, bidirectional thyristor turns off.Below this phenomenon is denoted as extinguishing arc by mistake.Particularly, under the moment irregular situation of the situation occurred at random in by mistake extinguishing arc or by mistake extinguishing arc, the action of LED lamp device is unstable, lights middle flicker.
As the scheme solved the problem, can consider to possess the LED lamp device always flowing continuously through in bidirectional thyristor and keep the electric current of more than electric current, prevent the function missing extinguishing arc.Such LED lamp device such as has the device recorded in patent documentation 1.In this device, being connected the equivalent loads such as constant current circuit (DummyLoad) in parallel with the dc-dc of powering to LED, by flowing through electric current in this equivalent load, making the electric current flow through in bidirectional thyristor exceed maintenance electric current.In addition, in equivalent load, flow through electric current like this, also play and the timer circuit of dimmer is resetted, makes the effect of bidirectional thyristor conducting again of disconnection.
Patent documentation 1: Japanese Unexamined Patent Publication 2010-140824 publication
Summary of the invention
In the technology that patent documentation 1 is recorded, always flow continuously through the electric current keeping more than electric current by arranging equivalent load.Can solving the problem thus, but keep electric current different because of dimmer, needing the dimmer of the electric current of more than 30mA also to exist much to maintain the on-state of bidirectional thyristor.Particularly, when utilizing the circuit of electric capacity input mode to form LED lamp device, in the interdischarge interval of smmothing capacitor, input current is roughly zero, so require than keeping the large electric current of electric current all to flow through equivalent load.Herein, be 100V to the virtual value of the voltage that equivalent load applies, when the electric current flow through in equivalent load is 30mA, the loss of equivalent load is 3W.Consider that the bulb-shaped LED of commercialization lights and mostly consume electric power less than 10W, only equivalent load is not preferred with regard to producing being lost in efficiency of 3W.
The object of the invention is to, realize dimmer can being made stably to work and suppressing to glimmer and the good LED lamp device of efficiency.
In order to solve the problem, LED lamp device of the present invention possesses: will be converted to the rectification circuit of commutating voltage by the AC supply voltage of phase control; To export with the direct current of above-mentioned rectification circuit via diode and be connected, make above-mentioned commutating voltage smoothly and generate the capacitor of direct voltage; Change above-mentioned direct voltage and DC-DC change-over circuit to light-emitting diode (hereinafter referred to as LED) load supplying; With the current setting circuit of current setting value exporting above-mentioned DC-DC change-over circuit according to above-mentioned commutating voltage, the feature of this LED lamp device is: be configured to possess and export with the direct current of above-mentioned rectification circuit the variable resistance circuit be connected; With the resistance value initialization circuit of resistance value changing above-mentioned variable resistance circuit according to above-mentioned commutating voltage, above-mentioned resistance value initialization circuit, when above-mentioned commutating voltage is than required reference voltage height, increases the resistance value of above-mentioned variable resistance circuit.
According to LED lamp device of the present invention, can realize making dimmer stably work and suppress to glimmer and the good LED lamp device of efficiency.
Accompanying drawing explanation
Fig. 1 is the block diagram of LED lamp device of the present invention.
Fig. 2 is the internal circuit diagram of the dimmer of phase control mode.
Fig. 3 is the action waveforms connecting the situation of incandescent lamp bulb at the dimmer of phase control mode.
Fig. 4 is the structure example of variable resistance circuit in LED lamp device of the present invention and resistance value initialization circuit.
Fig. 5 is the action waveforms example of LED lamp device of the present invention.
Fig. 6 is the structure example of variable resistance circuit in LED lamp device of the present invention and resistance value initialization circuit.
Fig. 7 is the output voltage waveforms of adjuster circuit.
Fig. 8 is the concrete circuit structure example of LED lamp device of the present invention.
Fig. 9 is the control circuit power circuit in LED lamp device of the present invention.
Symbol description
100 AC power
101 dimmers
102 rectification circuits
103,134 diodes
104,113,137 capacitors
105DC-DC change-over circuit
106LED load
107 variable resistance circuits
108 resistance value initialization circuits
109 current setting circuits
110 bidirectional thyristors
111,116,117,120,121,123,129,130,132,138,141 resistance
112 variable resistors
114 bidirectional trigger diodes (DIAC:DiodeACSwitch)
115 loads
118,127 comparators
119,128 direct voltage sources
122、125、131、135、143MOSFET
124,142 Zener diodes
126 adjusters (Regulator) circuit
133 diode bridges
136 choking-windings
139 control circuits
140 control circuit power circuits
Embodiment
Utilize accompanying drawing that embodiments of the present invention are described.
Fig. 1 is the block diagram of LED lamp device of the present invention.In Fig. 1, from rectification circuit 102, right side is LED lamp device of the present invention.The AC supply voltage of rectification circuit 102 pairs of modulated light device 101 phase control is carried out rectification and generates commutating voltage.The direct current of rectification circuit 102 exports and is connected with capacitor 104 via diode 103.Capacitor 104 makes commutating voltage level and smooth and generates direct voltage.That is, the LED lamp device in the present embodiment is the circuit of electric capacity input mode.Thus, the pulsation of direct voltage reduces, and is easy to the pulsation suppressing the electric current flow through in LED for the DC-DC change-over circuit 105 of rear end.DC-DC change-over circuit 105 conversion dc voltage is also powered to LED load 106.The number of LED load 106, LED and connected mode are not limited, in addition, also can comprise the LED module being built-in with protection element etc.
The direct current of rectification circuit 102 exports and is connected with variable resistance circuit 107.Resistance value initialization circuit 108 exports the resistance value setting signal of the resistance value for changing variable resistance circuit 107 based on commutating voltage.The effect that the on-off state that variable resistance circuit 107 and resistance value initialization circuit 108 play the bidirectional thyristor controlled in dimmer 101 according to commutating voltage is carried out controlling and make the timer circuit of dimmer 101 to reset and bidirectional thyristor is connected again.Current setting circuit 109 exports the current setting value of DC-DC change-over circuit 105 based on commutating voltage.Control, the i.e. light modulation of the LED current corresponding to the operation of dimmer 101 can be carried out by current setting circuit 109.
Before concrete action is described, dimmer 101 is described.Fig. 2 is the dimmer 101 for the phase control mode using bidirectional thyristor, represents the figure of the summary of internal circuit.As shown in Figure 2, bidirectional thyristor 110 is connected between AC power 100 with load 115.In addition, the timer circuit of the concatermer as resistance 111, variable resistor 112 and electric capacity 113 is connected in parallel with bidirectional thyristor 110.Variable resistor 112 and the tie point of capacitor 113, be connected via the grid of bidirectional trigger diode 114 with bidirectional thyristor 110.
Fig. 3 be connect incandescent lamp bulb as load 115 when the on-off state of bidirectional thyristor 110 and load voltage, load current waveform.During the connection of bidirectional thyristor 110, load voltage is roughly the same with the voltage of AC power 100.Because incandescent lamp bulb is almost pure resistance, so the waveform of load current and voltage are similar figures.Near the zero crossing of AC power 100, when load current is less than the maintenance electric current of bidirectional thyristor 110, bidirectional thyristor 110 turns off.At the off period of bidirectional thyristor 110, from AC power 100 to resistance 111, variable resistor 112, capacitor 113, load 115 path flow through Weak current, accumulated charge in capacitor 113.Compared with incandescent lamp bulb, the impedance of dimmer 101 is fully large, so load voltage is roughly zero.The voltage rise of capacitor 113, when bidirectional trigger diode 114 is connected, bidirectional thyristor 110 conducting again.When increasing the resistance value of variable resistor 112 by the operation of dimmer 101, the time to bidirectional thyristor 110 again conducting is elongated.Thus, load electric reduces, if incandescent lamp bulb then light output minimizing.
In the present invention, the load 115 in Fig. 2 is LED lamp devices of Fig. 1, different from incandescent lamp bulb characteristic.Specifically, high with the specific impedance of incandescent lamp bulb phase, and be not necessarily pure resistance as incandescent lamp bulb.Thus action waveforms is also not necessarily identical with Fig. 3.
Fig. 4 is the structure example of variable resistance circuit 107 in LED lamp device of the present invention and resistance value initialization circuit 108.Resistance value initialization circuit 108 is made up of resistance 116 and 117, comparator 118, direct voltage source 119, exports the resistance value setting signal of L level when commutating voltage is higher than required reference voltage.
Variable resistance circuit 107 by resistance 120 with as the concatermer of the MOSFET122 of switch element with form with the resistance 121 that this concatermer is connected in parallel, by the on-off of MOSFET122, resistance value is set as two kinds of values.Also the switch element of other kinds such as bipolar transistor or IGBT can be used to replace MOSFET122.
If commutating voltage is higher than reference voltage, then MOSFET122 disconnects, and resistance 120 is cut off, and correspondingly the resistance value of variable resistance circuit 107 raises.Wherein, if the resistance value of variable resistance circuit 107 not necessarily two kinds of values, also can be according to commutating voltage continually varying structure.In addition, as long as can realize the action of following explanation, then the concrete structure of variable resistance circuit 107 and resistance value initialization circuit 108 does not just limit.
Fig. 5 is the action waveforms of LED lamp device of the present invention, represents commutating voltage, direct voltage, the waveform of rectified current and the resistance value of variable resistance circuit 107.Herein, direct voltage is described above, is the voltage of capacitor 104.Rectified current is the average anode current of rectification circuit 102, is and the electric current flow through in dimmer 101 is carried out to the roughly the same waveform of the electric current after rectification.
During bidirectional thyristor 110 conducting, commutating voltage rises to the voltage level roughly the same with AC power 100.Now, commutating voltage is higher than reference voltage, and the resistance value of variable resistance circuit 107 increases.In addition, the electric current that capacitor 104 is charged is begun to flow through, so rectified current also sharply increases from AC power 100 via dimmer 101, rectification circuit 102, diode 103.To capacitor 104 charge electric current, along with capacitor 104 charge, direct voltage rise and reduce, so rectified current also reduces gradually.
Become (when charging complete done in following brief note) near maximum, moment to the charging complete of capacitor 104 at direct voltage, rectified current is roughly consistent with the electric current flow through in variable resistance circuit 107.In this moment, be less than the mode of required reference current with rectified current, preset the resistance value of variable resistance circuit 107.And then if in advance reference current to be set smaller than the maintenance electric current of bidirectional thyristor 110, then bidirectional thyristor 110 turns off.Keep electric current different because of dimmer, but minimum be also 5mA.Thus, if be set as less than 5mA by reference current, then for nearly all dimmer, can both reliably make bidirectional thyristor turn off when charging complete.
The resistance value of variable resistance circuit 107 now, based on the maximum setting of the commutating voltage of said reference electric current and anticipation.Such as, consider situation about using under AC supply voltage 100Vac, commutating voltage during charging complete is about 141V to the maximum.Thus, when commutating voltage is 141V, in order to the 5mA making rectified current be less than reference current, resistance value is set greater than 28.2k Ω (=141V ÷ 5mA).
Certainly, if not contact resistance 121 in the variable resistance circuit 107 of Fig. 4, at commutating voltage than making variable resistance circuit 107 for open state during reference voltage height, then for nearly all dimmer, can both bidirectional thyristor be reliably made to turn off when charging complete.But tight, in Fig. 4, the resistance 116 and 117 of the element of resistance value initialization circuit 108 also can think a part for variable resistance circuit 107, because these reasons, is difficult to make variable resistance circuit 107 become open state completely.Thus, not contact resistance 121 when, also need the resistance value by above-mentioned main points setting resistance 116 and 117.
Bidirectional thyristor 110 closes has no progeny, and commutating voltage declines as shown in Figure 5.When commutating voltage lower than reference voltage when, the resistance value of variable resistance circuit 107 reduces.Flow through electric current via the timer circuit of dimmer 101, rectification circuit 102 to variable resistance circuit 107 from AC power 100, make timer circuit reset and make bidirectional thyristor 110 conducting again.Wherein, during bidirectional thyristor 110 disconnects, the energy that also electricity container 104 is accumulated makes DC-DC change-over circuit 105 stably action.
The problem of LED lamp device is in the past, in each cycle of AC power, bidirectional thyristor by mistake extinguishing arc situation and not by mistake the situation of extinguishing arc occur at random or moment of extinguishing arc is by mistake random time, the action of dimmer becomes unstable.Like this, when the action of dimmer is unstable, can glimmer in LED load.
Countermeasure in the past has, and exports and connects equivalent load, prevent the mistake extinguishing arc of bidirectional thyristor, make the mode of dimmer stably action thus at the direct current of rectification circuit.In which, make the electric current that flows through in equivalent load larger, can expect to be suitable for the dimmer of wider scope.But consider that the loss of equivalent load increases the efficiency caused and reduces, this is unpractical.
To this, in the present invention, the always identical moment when capacitor 104 charging complete deliberately makes bidirectional thyristor 110 turn off.In such mode, also can make dimmer 101 and DC-DC change-over circuit 105 stably action, flicker can be prevented.In addition, with flow through by equivalent load be greater than the electric current keeping electric current mode compared with, mode efficiency of the present invention is better.
Fig. 6 is other examples of variable resistance circuit 107 and resistance value initialization circuit 108.In the circuit of Fig. 6, resistance 123, Zener diode 124, MOSFET125 form adjuster circuit 126.Also the semiconductor element of other kinds such as bipolar transistor can be used to replace MOSFET125.This adjuster circuit 126 is for the variable resistance circuit 107 in Fig. 4 and the composed component both resistance value initialization circuit 108.Therefore, not as shown in Figure 4, variable resistance circuit 107 and resistance value initialization circuit 108 is distinguished with dotted line.
As shown in Figure 7, commutating voltage is clamped down at required magnitude of voltage by adjuster circuit 126.Clamping voltages can be set as the Zener voltage of Zener diode 124.By comparing with required threshold value the output voltage of adjuster circuit 126, comparator 127 judges that whether commutating voltage is higher than reference voltage indirectly.This threshold value can according to the voltage value of direct voltage source 128.In addition, comparator 127 exports at commutating voltage than resistance value setting signal during reference voltage height being L level.By being reduced the level of commutating voltage by rectifier circuit 126, even if when reference voltage is a few V ~ tens V low, do not affect the precision of the comparison of comparator 127 yet.
In the output of adjuster circuit 126, be connected in parallel resistance 129 with as the concatermer of the MOSFET131 of switch element and resistance 130.Also the switch element of other kinds such as bipolar transistor or IGBT can be used to replace MOSFET131.When commutating voltage is than reference voltage height, resistance value setting signal is L level, and MOSFET131 disconnects.Resistance 130 is cut off, and correspondingly the resistance value of variable resistance circuit 107 raises.
As shown in Figure 7, during the Zener voltage height of commutating voltage than Zener diode 124, output voltage and the Zener voltage of adjuster circuit 126 are roughly equal.And then when MOSFET131 disconnects, the electric current flow through in variable resistance circuit 107 is the value determined by Zener voltage and resistance 130.Herein, during capacitor 104 charging complete, in order to make rectified current be less than reference current, being less than the mode of reference current with the current value determined by Zener voltage and resistance 130, determining the resistance value of Zener voltage and resistance 130.If when reference current is 5mA, Zener voltage is 10V, the resistance value of resistance 130 is set greater than 2k Ω (=10V ÷ 5mA).
Fig. 8 illustrates the structure of rectification circuit 102 in the LED lamp device shown in Fig. 1 and DC-DC change-over circuit 105 particularly.In Fig. 8, the full-wave rectifying circuit that diode bridge 133 is formed, is equivalent to the rectification circuit 102 of Fig. 1.In addition, the buck circuit be made up of diode 134, the MOSFET135 as switch element, choking-winding 136, capacitor 137, the resistance 138 of current detecting, control circuit 139, control circuit power circuit 140, is equivalent to the DC-DC change-over circuit 105 of Fig. 1.In addition, as the parts do not had in Fig. 1, the resistance 132 preventing inrush current has been added.In addition, the capacitor etc. of fuse and filtering can also be added.Also according to the voltage of LED load 106, buck chopper can not used but use buck-boost chopper or boost chopper, if need insulation also can use flyback converter in addition.Also the switch element of other kinds such as bipolar transistor or IGBT can be used to replace MOSFET135.
In Fig. 8, the electric current that control circuit 139 exports according to current setting value control DC-DC change-over circuit 105 pairs of LED load 106.Specifically, can consider the electric current flow through in MOSFET135 reach current setting value before MOSFET135 is connected control.By the electric current flow through in control MOSFET135, the electric current flow through in LED load 106 indirectly can be controlled.Such control circuit 139, can be formed simply with the control IC of commercially available LED.Certainly, also can not use control IC, but the discrete parts such as combination comparator are formed, and also can use microcomputer or digital signal processor software sharing.
The control circuit negative electrode of power circuit 140 with diode 103 is connected, and changes the direct voltage of capacitor 104, generates the supply voltage of control circuit 139.Specifically, the operation voltage of control IC, comparator, operational amplifier etc. in control circuit 139 is generated.In addition, in Fig. 8, eliminate distribution (connection), but control circuit power circuit 140 also can generate the supply voltage of resistance value initialization circuit 108 and current setting circuit 109 etc. as required.
The control circuit concrete structure of power circuit 140, as shown in Figure 9, can consider the adjuster circuit using resistance 141, Zener diode 142, MOSFET143.Also the element of other kinds such as bipolar transistor can be used to replace MOSFET143.Beyond Fig. 9, also can form the adjuster circuit of other modes such as three terminal adjusters.
, also can consider that the control circuit anode of power circuit 140 with diode 103 is connected herein, the commutating voltage before level and smooth with electricity container 104 be changed, generates the structure of the supply voltage of control circuit.Such as, when the variable resistance circuit 107 of pie graph 6 and resistance value initialization circuit 108, make the output voltage of adjuster circuit 126 level and smooth, the supply voltage of control circuit can be generated.But, in this situation, when the charging complete of capacitor 104, correspondingly make rectified current increase with the electric current flow through in control circuit power circuit 140, run counter to the object that rectification circuit will be made to be less than reference current.In other words, the resistance value correspondingly reducing variable resistance circuit 107 with the resistance value of control circuit power circuit 140 is equivalent to.Thus, the inapplicable such structure of LED lamp device of the present invention.
On the other hand, if connection control circuit power circuit 140 as shown in Figure 8, then from during capacitor 104 charging complete to during restarting capacitor 104 to charge, the interdischarge interval of capacitor 104, control circuit power circuit 140 is the states cut off from AC power 100.That is, when capacitor 104 charging complete, the electric current flow through in control circuit power circuit 140 is not made to be greater than rectified current.Thus being less than in reference current making rectified current is effective method of attachment.
Arranging outside control circuit power circuit 140 as shown in Figure 8, also can utilize the voltage produced in DC-DC change-over circuit 105, generating the supply voltage of control circuit.Such as, the method that ancillary coil is set in choking-winding 136 can be considered.The method is same with the method for Fig. 8 in the supply voltage carrying out the direct voltage of capacitor 104 changing generation control circuit, also can realize same effect.
Claims (3)
1. a LED lamp device, it possesses the rectification circuit by being converted to commutating voltage by the AC supply voltage of phase control; To export with the direct current of described rectification circuit via diode and be connected, make described commutating voltage smoothly and generate the capacitor of direct voltage; Change described direct voltage and the DC-DC change-over circuit that LED load is powered; With the current setting circuit of current setting value exporting described DC-DC change-over circuit according to described commutating voltage, the feature of this LED lamp device is:
Possess and export with the direct current of described rectification circuit the variable resistance circuit be connected; With the resistance value initialization circuit of resistance value changing described variable resistance circuit according to described commutating voltage,
Described variable resistance circuit possesses the concatermer of resistance and switch element,
Described resistance value initialization circuit, when described commutating voltage is than required reference voltage height, disconnects described switch element, increases the resistance value of described variable resistance circuit,
Near the moment of described capacitor charging complete, the average anode current of described rectification circuit is less than required reference current,
Described resistance value initialization circuit possesses: commutating voltage is clamped down on the voltage stabilizing circuit in required magnitude of voltage; With by comparing the output voltage of this voltage stabilizing circuit and required threshold value, indirectly judge the comparator whether described commutating voltage higher than described reference voltage,
Described concatermer is connected with the output of described voltage stabilizing circuit.
2. LED lamp device as claimed in claim 1, is characterized in that:
Described voltage stabilizing circuit, possesses resistance, semiconductor element and Zener diode, and described commutating voltage is clamped down on the Zener voltage in described Zener diode.
3. LED lamp device as claimed in claim 1 or 2, is characterized in that:
Described DC-DC change-over circuit possesses: control the control circuit to the electric current that described LED load exports according to described current setting value; Voltage with the cathode side of the described diode of conversion generates, generates the control circuit power circuit of the supply voltage of described control circuit, described resistance value initialization circuit and described current setting circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011251207A JP5822670B2 (en) | 2011-11-17 | 2011-11-17 | LED lighting device |
| JP2011-251207 | 2011-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103124456A CN103124456A (en) | 2013-05-29 |
| CN103124456B true CN103124456B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210464565.6A Expired - Fee Related CN103124456B (en) | 2011-11-17 | 2012-11-16 | LED lamp device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5822670B2 (en) |
| CN (1) | CN103124456B (en) |
| TW (1) | TWI498040B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160212819A1 (en) * | 2013-08-19 | 2016-07-21 | Philips Lighting Holding B.V. | Led driver and driving method |
| CN103415117A (en) * | 2013-08-19 | 2013-11-27 | 中国传媒大学 | Stage dimmer based on chopping-control alternating-current voltage regulation and regulating method thereof |
| JP6113669B2 (en) * | 2014-01-14 | 2017-04-12 | 大光電機株式会社 | Lighting fixture and lighting system |
| CN105992437A (en) * | 2015-02-13 | 2016-10-05 | 凹凸电子（武汉）有限公司 | Light source drive circuit and light source module |
| CN108023471B (en) * | 2016-10-28 | 2020-08-07 | 上海儒竞自动控制系统有限公司 | Soft power-on system, equipment and soft power-on method thereof |
| KR102253999B1 (en) * | 2021-01-19 | 2021-05-18 | 이석현 | LED dimmer with dimming control function for phase control |
| KR102254002B1 (en) * | 2021-01-19 | 2021-05-18 | 이석현 | Power Switch for LED Light |
| CN112882560B (en) * | 2021-02-04 | 2024-05-03 | Oppo广东移动通信有限公司 | Power management method, power device, electronic apparatus, and storage medium |
| CN218549563U (en) * | 2022-09-15 | 2023-02-28 | 安克创新科技股份有限公司 | Current compensation circuit, quasi-resonant power supply and charging device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529983A (en) * | 2006-10-25 | 2009-09-09 | 松下电工株式会社 | LED lighting circuit and illuminating apparatus using the same |
| CN101998734A (en) * | 2009-08-21 | 2011-03-30 | 东芝照明技术株式会社 | Lighting circuit and illumination device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4512938B2 (en) * | 2003-08-22 | 2010-07-28 | 寛一 大杉 | Light-emitting diode lamp powered by dynamo |
| JP2010140824A (en) * | 2008-12-12 | 2010-06-24 | Sharp Corp | Power supply device and lighting device |
-
2011
- 2011-11-17 JP JP2011251207A patent/JP5822670B2/en not_active Expired - Fee Related
-
2012
- 2012-10-26 TW TW101139708A patent/TWI498040B/en not_active IP Right Cessation
- 2012-11-16 CN CN201210464565.6A patent/CN103124456B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529983A (en) * | 2006-10-25 | 2009-09-09 | 松下电工株式会社 | LED lighting circuit and illuminating apparatus using the same |
| CN101998734A (en) * | 2009-08-21 | 2011-03-30 | 东芝照明技术株式会社 | Lighting circuit and illumination device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013105729A (en) | 2013-05-30 |
| CN103124456A (en) | 2013-05-29 |
| TW201336343A (en) | 2013-09-01 |
| TWI498040B (en) | 2015-08-21 |
| JP5822670B2 (en) | 2015-11-24 |
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