CN103124456A - Led lightening device - Google Patents
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- CN103124456A CN103124456A CN2012104645656A CN201210464565A CN103124456A CN 103124456 A CN103124456 A CN 103124456A CN 2012104645656 A CN2012104645656 A CN 2012104645656A CN 201210464565 A CN201210464565 A CN 201210464565A CN 103124456 A CN103124456 A CN 103124456A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000007600 charging Methods 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims 4
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- 230000002457 bidirectional effect Effects 0.000 description 37
- 238000005286 illumination Methods 0.000 description 4
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Abstract
The invention provides an LED lightening device. The LED lightening device enables a light modulator in phase control to act stably to thereby restrain flashing, and is high in efficiency. The LED lightening device comprises a rectifying circuit for transforming an AC power supply voltage in phase control into a rectifying voltage; a capacitor for smoothing the rectifying voltage and generating a DC voltage via the DC output connection of a diode and the rectifying circuit; a DC-DC conversion circuit used for transforming the DC voltage and supplying power to an LED light-emitting diode load; a current setting circuit for outputting a current set value of the DC-DC conversion circuit according to the rectifying voltage; a variable resistor circuit configured to be connected with the DC output of the rectifying circuit; and a resistance value setting circuit used for changing the resistance value of the variable resistor circuit according to the rectifying voltage. The resistance value setting circuit enables the resistance value of the variable resistor circuit to be increased when the rectifying voltage is higher than a required reference voltage.
Description
Technical field
The present invention relates to the LED lamp device.
Background technology
LED receives publicity as the outstanding light source of environment, and illumination is used for the general lighting of dwellings and office as LED.In the LED illumination, existence possesses the joint same with incandescent lamp bulb, be arranged on the bulb-shaped LED illumination of using on the utensil that incandescent lamp bulb uses, also occurred with as product corresponding to the dimmer (dimmer made in following brief note) of the phase control mode of the light modulation unit of incandescent lamp bulb.
Dimmer mostly makes conducting between AC power and load, cut-out by conducting, shutoff as the bidirectional thyristor (TRIAC:Triode ACSemiconductor Switch) of semiconductor element.TRIAC if Continuous-flow is crossed the electric current larger than the current value that is called the regulation that keeps electric current, turn-offs (extinguishing arc) in conducting (scratch start) afterwards again.Dimmer is that incandescent lamp bulb designs for prerequisite mainly with load greatly.If load is incandescent lamp bulb, from the bidirectional thyristor conducting the time be carved near the AC power zero crossing moment till, all flow through and surpass the enough electric currents that keep electric current, bidirectional thyristor is kept on-state.But, load is in the LED illumination of LED, to compare electric current little with incandescent lamp bulb, so from the bidirectional thyristor conducting the time be carved into can not flow through till near the AC power zero crossing moment and surpass the enough electric currents that keep electric current, can occur near the AC power zero crossing before the bidirectional thyristor phenomenon of turn-offing.Below this phenomenon is denoted as the mistake extinguishing arc.Particularly, under the irregular situation of the moment of the random situation that occurs of mistake extinguishing arc or mistake extinguishing arc, the action of LED lamp device is unstable, lights middle the flicker.
As a scheme that addresses the above problem, always can consider to possess in bidirectional thyristor Continuous-flow and cross the electric current that keeps more than electric current, the LED lamp device that prevents the function of mistake extinguishing arc.Such LED lamp device for example has the device of record in patent documentation 1.In this device, be connected in parallel the equivalent loads (Dummy Load) such as constant current circuit with the DC-DC transducer that LED is powered, by current flowing in this equivalence load, the electric current that flows through in bidirectional thyristor surpassed keep electric current.In addition, current flowing in equivalent load, also play the bidirectional thyristor effect of conducting again that the timer circuit that makes dimmer resets, makes disconnection like this.
Patent documentation 1: TOHKEMY 2010-140824 communique
Summary of the invention
In the technology of patent documentation 1 record, always Continuous-flow is crossed the electric current that keeps more than electric current by equivalent load is set.Can address the above problem thus, but keep electric current different because of dimmer, need the dimmer of the electric current more than 30mA also to exist much for the on-state of keeping bidirectional thyristor.Particularly, utilize the circuit of electric capacity input mode to consist of in the situation of LED lamp device, input current is roughly zero in the interdischarge interval of smmothing capacitor, so require than keeping the large electric current of electric current all to flow through equivalent load.Herein, the virtual value of the voltage that equivalent load is applied is 100V, and the electric current that flows through in equivalent load is in the situation of 30mA, and the loss of equivalent load is 3W.The bulb-shaped LED that considers commercialization lights most consumption power shortage 10W, and it is not preferred that only equivalent load just produces being lost on efficient of 3W.
The object of the invention is to, realization can make dimmer stably work and suppress to glimmer and LED lamp device that efficient is good.
In order to address the above problem, LED lamp device of the present invention possesses: will be converted to by the AC supply voltage of phase control the rectification circuit of commutating voltage; Export the capacitor that is connected, makes above-mentioned commutating voltage smoothly and generate direct voltage via the direct current of diode and above-mentioned rectification circuit; Change above-mentioned direct voltage and to the DC-DC change-over circuit of light-emitting diode (hereinafter referred to as LED) load supplying; With the current setting circuit according to the current setting value of the above-mentioned DC-DC change-over circuit of above-mentioned commutating voltage output, this LED lamp device is characterised in that: constitute and possess the variable resistance circuit that is connected with the direct current output of above-mentioned rectification circuit; With change the resistance value initialization circuit of the resistance value of above-mentioned variable resistance circuit according to above-mentioned commutating voltage, above-mentioned resistance value initialization circuit when above-mentioned commutating voltage is higher than desired reference voltage, increases the resistance value of above-mentioned variable resistance circuit.
According to LED lamp device of the present invention, can realize to make dimmer stably work and suppress to glimmer and LED lamp device that efficient is good.
Description of drawings
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 connects the action waveforms of the situation of incandescent lamp bulb at the dimmer of phase control mode.
Fig. 4 is variable resistance circuit in LED lamp device of the present invention and the structure example of resistance value initialization circuit.
Fig. 5 is the action waveforms example of LED lamp device of the present invention.
Fig. 6 is variable resistance circuit in LED lamp device of the present invention and the structure example of 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
The 105DC-DC change-over circuit
The 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:Diode AC Switch)
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 the description of drawings embodiments of the present invention.
Fig. 1 is the block diagram of LED lamp device of the present invention.In Fig. 1, the right side is LED lamp device of the present invention from rectification circuit 102.The AC supply voltage of 102 pairs of modulated light device 101 phase control of rectification circuit is carried out rectification and is generated commutating voltage.The direct current output of rectification circuit 102 is connected with capacitor 104 via diode 103.Capacitor 104 makes commutating voltage smoothly generate 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 of the electric current that suppresses to flow through in LED for the DC-DC change-over circuit 105 of rear end.DC-DC change-over circuit 105 conversion dc voltages are also powered to LED load 106.For LED load 106, number and the connected mode of LED do not limit, and in addition, can comprise being built-in with protection with the LED module of element etc. yet.
The direct current output of rectification circuit 102 is connected with variable resistance circuit 107.Resistance value initialization circuit 108 is based on the resistance value setting signal of commutating voltage output for the resistance value that changes variable resistance circuit 107.Variable resistance circuit 107 and resistance value initialization circuit 108 play the effect that connection, the off-state of controlling the bidirectional thyristor in dimmer 101 according to commutating voltage are controlled and made the timer circuit of dimmer 101 reset bidirectional thyristor is connected again.Current setting circuit 109 is based on the current setting value of commutating voltage output DC-DC change-over circuit 105.Can carry out with the control of the corresponding LED electric current of the operation of dimmer 101, be light modulation by current setting circuit 109.
Before the concrete action of explanation, dimmer 101 is described.Fig. 2 is the dimmer 101 for the phase control mode that uses bidirectional thyristor, the figure of the summary of expression internal circuit.As shown in Figure 2, bidirectional thyristor 110 is connected between AC power 100 and load 115.In addition, be connected in parallel as the timer circuit of resistance 111, variable resistor 112 with the concatermer of electric capacity 113 with bidirectional thyristor 110.The tie point of variable resistor 112 and capacitor 113 is connected via the grid of bidirectional trigger diode 114 with bidirectional thyristor 110.
Fig. 3 connects incandescent lamp bulb as connection, off-state and the load voltage of the bidirectional thyristor 110 in the situation of load 115, the waveform of load current.During the connection of bidirectional thyristor 110, the voltage of load voltage and AC power 100 is roughly the same.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, load current is during less than the maintenance electric current of bidirectional thyristor 110, and bidirectional thyristor 110 turn-offs.At the off period of bidirectional thyristor 110, flow through Weak current from AC power 100 to resistance 111, the path of variable resistor 112, capacitor 113, load 115, accumulate electric charge in capacitor 113.Compare with incandescent lamp bulb, the impedance of dimmer 101 is fully large, so load voltage is roughly zero.The voltage of capacitor 113 rises, when bidirectional trigger diode 114 is connected, and bidirectional thyristor 110 conducting again.When the operation by dimmer 101 increases the resistance value of variable resistor 112, to bidirectional thyristor 110 again the time till conducting elongated.Thus, load electric reduces, if light output minimizing of incandescent lamp bulb.
In the present invention, the load 115 in Fig. 2 is the LED lamp device of Fig. 1, and is different from the incandescent lamp bulb characteristic.Particularly, high with the specific impedance of incandescent lamp bulb phase, and be not necessarily pure resistance as incandescent lamp bulb.Thereby action waveforms is also not necessarily identical with Fig. 3.
Fig. 4 is variable resistance circuit 107 in LED lamp device of the present invention and the structure example of resistance value initialization circuit 108.Resistance value initialization circuit 108 is made of resistance 116 and 117, comparator 118, direct voltage source 119, and commutating voltage is than the resistance value setting signal of output L level in the higher situation of desired reference voltage.
If commutating voltage is higher than reference voltage, 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 two kinds of values not necessarily can be also according to commutating voltage continually varying structure.In addition, as long as can realize the action of following explanation, 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, expression commutating voltage, direct voltage, the waveform of rectified current and the resistance value of variable resistance circuit 107.Herein, direct voltage as mentioned above, is the voltage of capacitor 104.Rectified current is the average anode current of rectification circuit 102, is the waveform roughly the same with the electric current that flows through in dimmer 101 being carried out electric current after rectification.
During bidirectional thyristor 110 conducting, commutating voltage rises to the voltage level roughly the same with AC power 100.At this moment, commutating voltage is higher than reference voltage, and the resistance value of variable resistance circuit 107 increases.In addition, begin to flow through the electric current that capacitor 104 is charged via dimmer 101, rectification circuit 102, diode 103 from AC power 100, so rectified current also sharply increases.To the electric current of capacitor 104 charging, reduce along with capacitor 104 chargings, DC voltage rising, so rectified current also reduces gradually.
Near the moment of become maximum at direct voltage, the charging of capacitor 104 being completed when completing (following brief note do charging), the electric current that flows through in rectified current and variable resistance circuit 107 is roughly consistent.At this constantly, in the mode of rectified current less than desired reference current, preset the resistance value of variable resistance circuit 107.And then if in advance reference current is set as maintenance electric current less than bidirectional thyristor 110, bidirectional thyristor 110 turn-offs.Keep electric current different because of dimmer, but minimum is also 5mA.Thereby, if reference current is set as not enough 5mA, for nearly all dimmer, bidirectional thyristor is turn-offed.
The resistance value of variable resistance circuit 107 of this moment is set based on the maximum of the commutating voltage of said reference electric current and anticipation.For example, the situation that consideration is used under AC supply voltage 100Vac, the commutating voltage when charging is completed is approximately 141V to the maximum.Thereby, when commutating voltage is 141V, in order to make rectified current less than the 5mA of reference current, resistance value is set as greater than 28.2k Ω (=141V ÷ 5mA).
Certainly, if contact resistance 121 not in the variable resistance circuit 107 of Fig. 4, make variable resistance circuit 107 be open state when commutating voltage is higher than reference voltage, for nearly all dimmer, bidirectional thyristor is turn-offed.But tight, in Fig. 4, the resistance 116 and 117 of the element of resistance value initialization circuit 108 also can be thought the part of variable resistance circuit 107, because these reasons are difficult to make variable resistance circuit 107 to become open state fully.Thereby, in the situation of contact resistance 121, do not need to set by above-mentioned main points the resistance value of resistance 116 and 117 yet.
The problem of LED lamp device in the past is, in each cycle of AC power, the situation of bidirectional thyristor mistake extinguishing arc and not by mistake the situation of extinguishing arc occur at random or miss moment of extinguishing arc when random, the action of dimmer becomes unstable.Like this, when the action of dimmer is unstable, can glimmer in the LED load.
Countermeasure in the past has, and in the direct current output connection equivalent load of rectification circuit, prevents the mistake extinguishing arc of bidirectional thyristor, the mode that dimmer is stably moved.In this mode, make the electric current that flows through in equivalent load larger, can expect the dimmer of wider scope applicable.But, consider that the loss of equivalent load increases the Efficiency Decreasing that causes, this is unpractical.
To this, in the present invention, the always identical moment when capacitor 104 charging is completed deliberately makes bidirectional thyristor 110 turn-off.In such mode, dimmer 101 and DC-DC change-over circuit 105 are stably moved, can prevent flicker.In addition, compare with the mode that flows through with equivalent load greater than the electric current that keeps electric current, mode efficient 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 consist of adjuster circuit 126.Also can use the semiconductor element of other kinds such as bipolar transistor to replace MOSFET125.This adjuster circuit 126 is for both composed components of the variable resistance circuit 107 in Fig. 4 and resistance value initialization circuit 108.Therefore, not as shown in Figure 4, with dashed lines is distinguished variable resistance circuit 107 and resistance value initialization circuit 108.
As shown in Figure 7, adjuster circuit 126 clamps down on commutating voltage at desired magnitude of voltage.Clamp down on voltage and can be set as the Zener voltage of Zener diode 124.Comparator 127 compares and judges indirectly whether commutating voltage is higher than reference voltage with desired threshold value by the output voltage to adjuster circuit 126.This threshold value can be set according to the magnitude of voltage of direct voltage source 128.In addition, comparator 127 outputs are the resistance value setting signal of L level when commutating voltage is higher than reference voltage.By reduced the level of commutating voltage by rectifier circuit 126, even reference voltage is in the low situation of several V～tens V, do not affect the precision of the comparison of comparator 127 yet.
In the output of adjuster circuit 126, resistance 129 and concatermer and resistance 130 as the MOSFET131 of switch element are connected in parallel.Also can use the switch element of other kinds such as bipolar transistor or IGBT to replace MOSFET131.When commutating voltage was higher than reference voltage, the resistance value setting signal was the 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, when commutating voltage was higher than the Zener voltage of Zener diode 124, the output voltage of adjuster circuit 126 and Zener voltage were about equally.And then when MOSFET131 disconnected, the electric current that flows through in variable resistance circuit 107 was the value that is determined by Zener voltage and resistance 130.When capacitor 104 charging is completed, in order to make rectified current less than reference current, in the current value that determined by Zener voltage and resistance 130 mode less than reference current, determine that the resistance value of Zener voltage and resistance 130 gets final product herein.If reference current is 5mA, Zener voltage is in the situation of 10V, the resistance value of resistance 130 is set as greater than 2k Ω (=10V ÷ 5mA) gets final product.
Fig. 8 has represented rectification circuit 102 in LED lamp device shown in Figure 1 and the structure of DC-DC change-over circuit 105 particularly.In Fig. 8, the full-wave rectifying circuit that diode bridge 133 consists of is equivalent to the rectification circuit 102 of Fig. 1.In addition, the resistance 138 of being used by diode 134, the MOSFET135 as switch element, choking-winding 136, capacitor 137, current detecting, control circuit 139, control circuit are equivalent to the DC-DC change-over circuit 105 of Fig. 1 with the buck circuit that power circuit 140 consists of.In addition, as the parts that do not have in Fig. 1, appended the resistance 132 that prevents that inrush current from using.In addition, also can append capacitor that fuse and filtering uses etc.Can not use the buck chopper device but use buck-boost chopper or boost chopper according to the voltage of LED load 106, if need in addition insulation can use flyback converter yet yet.Also can use the switch element of other kinds such as bipolar transistor or IGBT to replace MOSFET135.
In Fig. 8, control circuit 139 is controlled the electric current of 105 pairs of LED loads of DC-DC change-over circuit, 106 outputs according to current setting value.Particularly, can consider that the electric current that flows through reaches the control that before current setting value, MOSFET135 is connected in MOSFET135.By controlling the electric current that flows through in MOSFET135, can indirectly control the electric current that flows through in LED load 106.Such control circuit 139, the control IC that the enough commercially available LED of energy use consists of simply.Certainly, also can not use and control IC, but the discrete parts formation such as combination comparator also can use microcomputer or digital signal processor to consist of with software.
Control circuit is connected with the negative electrode of diode 103 with power circuit 140, and the direct voltage of capacitor 104 is changed, and generates the supply voltage of control circuit 139.Particularly, the operation voltage of the control IC in generation control circuit 139, comparator, operational amplifier etc.In addition, omitted distribution (connection) in Fig. 8, but control circuit also can generate the supply voltage of resistance value initialization circuit 108 and current setting circuit 109 etc. as required with power circuit 140.
Control circuit as shown in Figure 9, can consider to use the adjuster circuit of resistance 141, Zener diode 142, MOSFET143 with the concrete structure of power circuit 140.Also can use the element of other kinds such as bipolar transistor to replace MOSFET143.Beyond Fig. 9, also can consist of the adjuster circuit of other modes such as three terminal adjusters.
, also can consider control circuit with power circuit 140 anodic bonding with diode 103 herein, to level and smooth with capacitor 104 before commutating voltage change, the structure of the supply voltage of generation control circuit.For example, in the variable resistance circuit 107 of pie graph 6 and the situation of resistance value initialization circuit 108, make the output voltage of adjuster circuit 126 level and smooth, can generate the supply voltage of control circuit.But, in this situation, when the charging of capacitor 104 is completed, with the electric current that flows through in power circuit 140, rectified current is increased with control circuit, run counter to less than the purpose of reference current with making rectification circuit.In other words, be equivalent to and correspondingly reduce the resistance value of variable resistance circuit 107 with control circuit with the resistance value of power circuit 140.Thereby, the inapplicable such structure of LED lamp device of the present invention.
On the other hand, if connect as shown in Figure 8 control circuit power circuit 140, when capacitor 104 charging is completed during capacitor 104 is restarted to charge, the interdischarge interval of capacitor 104, control circuit is states from AC power 100 cut-outs with power circuit 140.That is, when capacitor 104 charging is completed, do not make control circuit with the electric current that flows through in power circuit 140 greater than rectified current.Thereby, be effective method of attachment making rectified current aspect reference current.
Control circuit being set as shown in Figure 8 with outside power circuit 140, also can utilize the voltage that produces in DC-DC change-over circuit 105, generate the supply voltage of control circuit.For example, can consider to arrange the method for ancillary coil in choking-winding 136.The method is same with the method for Fig. 8 aspect the supply voltage of the direct voltage of capacitor 104 being changed the generation control circuit, also can realize same effect.
Claims (7)
1. LED lamp device, it possesses and will be converted to the rectification circuit of commutating voltage by the AC supply voltage of phase control; Export the capacitor that is connected, makes described commutating voltage smoothly and generate direct voltage via the direct current of diode and described rectification circuit; Change described direct voltage and to the DC-DC change-over circuit of LED load supplying; With the current setting circuit according to the current setting value of the described DC-DC change-over circuit of described commutating voltage output, this LED lamp device is characterised in that:
Possesses the variable resistance circuit that is connected with the direct current output of described rectification circuit; With change the resistance value initialization circuit of the resistance value of described variable resistance circuit according to described commutating voltage,
Described resistance value initialization circuit when described commutating voltage is higher than desired reference voltage, increases the resistance value of described variable resistance circuit.
2. LED lamp device as claimed in claim 1 is characterized in that:
Near the moment that described capacitor charging is completed, the average anode current of described rectification circuit is less than desired reference current.
3. LED lamp device as claimed in claim 1 or 2 is characterized in that:
Described variable resistance circuit possesses the concatermer of resistance and switch element, and described resistance value initialization circuit disconnects described switch element when described commutating voltage is higher than described reference voltage.
4. LED lamp device as claimed in claim 3 is characterized in that:
Described concatermer is connected with the direct current output of described rectification circuit.
5. LED lamp device as claimed in claim 3 is characterized in that:
Described resistance value initialization circuit possesses: commutating voltage is clamped down on voltage stabilizing circuit in desired magnitude of voltage; With compare by output voltage and desired threshold value to this voltage stabilizing circuit, indirectly judge the whether comparator higher than described reference voltage of described commutating voltage,
Described concatermer is connected with the output of described voltage stabilizing circuit.
6. LED lamp device as claimed in claim 5 is characterized in that:
Described voltage stabilizing circuit possesses resistance, semiconductor element and Zener diode, and described commutating voltage is clamped down on Zener voltage in described Zener diode.
7. LED lamp device as described in any one in claim 1～6 is characterized in that:
Described DC-DC change-over circuit possesses: the control circuit of controlling the electric current that described LED load is exported according to described current setting value; With the described direct voltage of conversion, generate 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 |
|---|---|---|---|
| JP2011-251207 | 2011-11-17 | ||
| JP2011251207A JP5822670B2 (en) | 2011-11-17 | 2011-11-17 | LED lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103124456A true CN103124456A (en) | 2013-05-29 |
| CN103124456B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023471A (en) * | 2016-10-28 | 2018-05-11 | 上海儒竞自动控制系统有限公司 | A kind of soft upper electric system, equipment and its soft powering method |
| WO2024055869A1 (en) * | 2022-09-15 | 2024-03-21 | 安克创新科技股份有限公司 | Current compensation circuit, quasi-resonant power supply, and charging device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105684552A (en) * | 2013-08-19 | 2016-06-15 | 飞利浦灯具控股公司 | Led driver and driving method |
| 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 |
| 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 |
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- 2011-11-17 JP JP2011251207A patent/JP5822670B2/en not_active Expired - Fee Related
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- 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
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| JP2005072546A (en) * | 2003-08-22 | 2005-03-17 | Kanichi Osugi | Light emitting diode lamp using dynamo as power supply |
| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023471A (en) * | 2016-10-28 | 2018-05-11 | 上海儒竞自动控制系统有限公司 | A kind of soft upper electric system, equipment and its soft powering method |
| 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 |
| WO2024055869A1 (en) * | 2022-09-15 | 2024-03-21 | 安克创新科技股份有限公司 | Current compensation circuit, quasi-resonant power supply, and charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5822670B2 (en) | 2015-11-24 |
| TW201336343A (en) | 2013-09-01 |
| TWI498040B (en) | 2015-08-21 |
| JP2013105729A (en) | 2013-05-30 |
| CN103124456B (en) | 2016-03-30 |
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