CN102545650A - Power conversion circuit - Google Patents
Power conversion circuit Download PDFInfo
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- CN102545650A CN102545650A CN2010106247870A CN201010624787A CN102545650A CN 102545650 A CN102545650 A CN 102545650A CN 2010106247870 A CN2010106247870 A CN 2010106247870A CN 201010624787 A CN201010624787 A CN 201010624787A CN 102545650 A CN102545650 A CN 102545650A
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Abstract
The invention discloses a power conversion circuit, which is provided with two alternating current input ends. The power conversion circuit comprises a switching device, a rectification circuit and a control circuit, wherein the switching device is positioned between the two alternating current input ends of the power conversion circuit, and is connected in parallel with the two alternating current input ends of the rectification circuit; the rectification circuit is used for rectifying alternating current input by the alternating current input ends of the rectification circuit, and outputting direct current voltage; and the control circuit is used for controlling the switching device in a high-impedance state until energy output by the rectification circuit reaches reference energy. By the technical scheme, the power conversion circuit can extract enough energy from a power supply under the condition of unexpected load impedance change.
Description
Technical field
The present invention relates to the light adjusting circuit technical field, particularly a kind of power-switching circuit.
Background technology
In light adjusting circuit, dimmer is connected with lighting load, is realizing from supply power voltage, extracting voltage when light modulation is carried out in the illumination load, is the electronic device or the power supply of other electronic devices of dimmer inside.
Consult Figure 1A, prior art provides a kind of light adjusting circuit, and dimmer mainly comprises dimmer switch S1 and ac rectifier, and the impedance of its supposition lighting load is expected.Wherein, C1 is used for dividing potential drop, and C3 is used for filtering, and ZL representes the electronic device of needs power supply.Thereby dimmer is through the power of the duty ratio control lighting load of the voltage of adjustment supply load, wherein the supply power voltage waveform of light adjusting circuit shown in Figure 1B, X axle express time, the Y axle is represented voltage amplitude.At t
0-t
aTime, adjusting control circuit control dimmer switch is closed, the voltage V at lighting load two ends
LoadBe approximately equal to supply power voltage, shown in Fig. 1 C.At t
a-t
bTime, adjusting control circuit control dimmer switch breaks off the voltage V at dimmer switch two ends
DimmerBe approximately equal to supply power voltage, shown in Fig. 1 D, can make the input voltage of ac rectifier enough high like this, ac rectifier converts the alternating voltage of input to direct voltage, gives inner electronic device of dimmer or the power supply of other electronic devices.
Prior art has following shortcoming:
The light adjusting circuit that prior art provides is that supposition is at t
a-t
bTime, the impedance of load is very little and be expected, if but at t
a-t
bTime, lighting load is variable and rate of change is bigger, and then ac rectifier just can not extract enough voltage from power supply, thereby can not be electronic device or other power electronics of dimmer inside.
Summary of the invention
The embodiment of the invention provides a kind of power-switching circuit, changes under the situation about can not expect at load impedance, can make power-switching circuit from power supply, extract enough energy.
In view of this, the embodiment of the invention provides:
A kind of power-switching circuit, said power-switching circuit have two ac input ends;
Said power-switching circuit comprises: switching device, rectification circuit and control circuit;
Switching device is between two ac input ends of power-switching circuit; Said switching device is parallelly connected with two ac input ends of rectification circuit;
Rectification circuit is used for the alternating current that the ac input end of rectification circuit is imported is carried out rectification, output dc voltage;
Control circuit is used for the control switch device and is in high impedance status, till the energy of rectification circuit output reaches reference energy.
Control circuit in the embodiment of the invention can be in high impedance status by the control switch device always; Till the energy of rectification circuit output reaches reference energy; Like this; Power-switching circuit just can extract enough voltage from power supply, thereby is the inner electronic device of dimmer or other power electronics.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Figure 1A is the light adjusting circuit structure chart that prior art provides;
Figure 1B is the voltage sketch map of the power supply that provides of prior art;
Fig. 1 C is the lighting load voltage sketch map that prior art provides;
Fig. 1 D is the dimmer voltage sketch map that prior art provides;
Fig. 2 is the power-switching circuit structure chart that one embodiment of the invention provides;
Fig. 3 is the power-switching circuit structure chart that another embodiment of the present invention provides;
Fig. 4 is the power-switching circuit structure chart that further embodiment of this invention provides;
Fig. 5 is that the load that the embodiment of the invention provides is connected sketch map with power-switching circuit;
Fig. 6 is the support structures figure that the embodiment of the invention provides;
Fig. 7 is the voltage sketch map of the power supply that provides of the embodiment of the invention;
Fig. 8 is the power-switching circuit structure chart that further embodiment of this invention provides.
Embodiment
Consult Fig. 2; The embodiment of the invention provides a kind of power-switching circuit, and this power-switching circuit has two ac input ends (being assumed to the first input end 1 and second input 2) and output 3, and this power-switching circuit comprises: switching device 10, rectification circuit 20 and control circuit 30; Wherein
Switching device 10, between two ac input ends of power-switching circuit, i.e. tandem tap device 10 between two ac input ends;
Said switching device 10 is parallelly connected with two ac input ends (like ac input end among Fig. 24 and ac input end 5) of rectification circuit 20; Be an ac input end 4 of said switching device 10 first ends 101 and rectification circuit and connect that second end 102 of switching device and another ac input end 5 of rectification circuit also connect.
Wherein, the concrete connected mode of switching device 10, rectification circuit 20 and control circuit 30 is: first input end 1 connects first end 101 of switching device and an ac input end 4 of rectification circuit; Second input 2 connects second end 102 of switching device and another ac input end 5 of rectification circuit; The controlled end 103 of switching device receives and is used for the control signal that the control switch device is high impedance status or low impedance state, and the control switch device that specifically can reception control circuit 30 sends is the control signal of high impedance status; Switching device 10 all has first end 101, second end 102 and controlled end 103 among follow-up each embodiment of the present invention.
Concrete, this control circuit can comprise: comparator is used for, controlling said switching device and being high impedance status during less than threshold voltage at the output voltage that relatively obtains rectification circuit; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, the impedance state of control switch device no longer.
Wherein, the output of rectification circuit 20 is used to electronic device energy is provided, and electronic device can be the electronic device that needs power supply in the power-switching circuit, also can be other any electronic equipments, such as Zigbee equipment etc.Reference energy is a predetermined power value, and this energy value is represented the electronic device energy needed, in different time different numerical can be arranged, and does not influence realization of the present invention.Wherein, the energy of rectification circuit 20 output reaches reference energy and representes that the output voltage of rectification circuit is greater than or equal to threshold voltage.
Control circuit in the embodiment of the invention can be in high impedance status by the control switch device always; Till the energy of rectification circuit output reached reference energy, like this, power-switching circuit just can extract voltage from power supply; Thereby for needing the electronic device power supply of power supply; Wherein, power supply is to be the AC power of switching device and the power supply of variable load that is connected in series with switching device, and the variable load that is connected in series with switching device can be lighting load.
Consult Fig. 3; Another embodiment of the present invention provides a kind of power-switching circuit; This power-switching circuit has two ac input ends (being assumed to the first input end 1 and second input 2) and output 3, and this power-switching circuit comprises: switching device 10, rectification circuit 20, control circuit 30, filter circuit 40 and power-supply circuit 50;
Power-supply circuit 50, promptly voltage conversion circuit is used for voltage transitions is carried out in the output of filter circuit 40, the voltage after the output conversion.
Wherein, control circuit 30 specifically comprises: zero cross detection circuit 301 and comparator 302, and zero cross detection circuit 301 is used for when the voltage of AC power or electric current when being zero, and trigger comparator compares; Wherein, AC power is to be the power supply of power-switching circuit and the power supply of variable load that is connected in series with power-switching circuit, and concrete, an ac input end of power-switching circuit is connected with variable load.Comparator 302 is used under the triggering of zero cross detection circuit 301, the relatively output parameter and the predefined parameter of rectification circuit, and when the output voltage that relatively obtains rectification circuit during less than threshold voltage, the control switch device is high-impedance state; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, no longer control the impedance of said switching device.Wherein, the output parameter of rectification circuit can be the output voltage of rectification circuit, and predefined parameter is a threshold voltage; Perhaps the output parameter of rectification circuit is the output current of rectification circuit, and predefined parameter is a threshold current, and perhaps the output parameter of rectification circuit is the power output of rectification circuit; Predefined parameter is a threshold power, and like this, comparator 302 can be through directly comparing the output voltage and the threshold voltage of rectification circuit; Perhaps, compare output current and threshold current of rectification circuit, perhaps; Relatively power output and a threshold power of rectification circuit obtain the output voltage of rectification circuit and the comparative result of threshold voltage, and promptly the output voltage of rectification circuit is less than threshold voltage; Perhaps, the output voltage of rectification circuit is greater than or equal to threshold voltage.
Need to prove; Comparator 302 can directly compare the output voltage and the threshold voltage of rectification circuit; The voltage and the reference voltage that also can be directly relatively obtain after the output voltage step-down to rectification circuit; Wherein, the voltage that obtains after the output voltage step-down of rectification circuit is identical with the ratio of the ratio of the output voltage of rectification circuit and reference voltage level and threshold voltage.Optional, output voltage that comparator 302 also can be through filter circuit relatively and the output voltage that a reference voltage level obtains rectification circuit less than threshold voltage or greater than, equal the comparative result of threshold voltage, do not influence realization of the present invention.
Control circuit in the embodiment of the invention is when the voltage of power supply or electric current are zero, and trigger comparator begins comparison, and comparator is at the output voltage that relatively obtains rectification circuit during less than threshold voltage; Control said switching device and be high impedance status; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, the no longer impedance of control switch device, like this; Power-switching circuit just can extract voltage from power supply, thereby is the electronic device power supply.
Consult Fig. 4; Another embodiment of the present invention provides a kind of power-switching circuit; This power-switching circuit has two ac input ends (being assumed to the first input end 1 and second input 2) and output 3, and this power-switching circuit comprises: switching device 10, rectification circuit 20, control circuit 30, filter circuit 40 and power-supply circuit 50 and adjusting control circuit 80;
Adjusting control circuit 80 is used for the impedance state of control switch device 10;
Concrete; The mode of the control of 80 pairs of switching devices 10 of comparator 302 blocking-up adjusting control circuits can be: the electronic switch 90 that outputs between the switching device 10 of comparator 302 control adjusting control circuits 80 breaks off, and makes the adjusting control circuit 80 can not control switch device 10.The mode that comparator 302 stops to block the control of 80 pairs of switching devices of adjusting control circuit can be: comparator 302 control adjusting control circuits 80 output to electronic switch 90 closures between the switching device 10, switching device 10 is in receive the state of adjusting control circuit 80 controls.
Concrete; Comparator 302; Be used under the triggering of zero cross detection circuit 301; When the output voltage that relatively obtains rectification circuit 20 during less than threshold voltage, export first control signal, said first control signal is used for the electronic switch 90 that outputs between the switching device 10 that control switch device 10 is high-impedance state and adjusting control circuit 80 and breaks off; When the output voltage that relatively obtains rectification circuit 20 is equal to, or greater than threshold voltage; Export second control signal; Said second control signal is used to control electronic switch 90 closures between the switching device 10 that output to of adjusting control circuit 80, is then continued switching device 10 is controlled by adjusting control circuit 80.
Need to prove; Control circuit 30 also can not comprise zero cross detection circuit 301; This moment, the output voltage and the threshold voltage of rectification circuit 20 compared in comparator 302 meetings always; During less than threshold voltage, the control switch device is high-impedance state at the output voltage that relatively obtains rectification circuit 20, and the control of 80 pairs of switching devices of blocking-up adjusting control circuit; When the output voltage that relatively obtains rectification circuit 20 is equal to, or greater than threshold voltage, the no longer impedance of control switch device 10, and stop to block the control of 80 pairs of switching devices of adjusting control circuit.
Control circuit in the embodiment of the invention is when the voltage of power supply or electric current are zero, and trigger comparator begins comparison, and comparator is at the output voltage that relatively obtains rectification circuit during less than threshold voltage; Control said switching device and be high impedance status; When the output voltage that relatively obtains rectification circuit was greater than or equal to threshold voltage, the no longer impedance of control switch device continued the control switch device by adjusting control circuit; Like this; Can either make power-switching circuit from power supply, extract enough voltage, thereby, can realize light modulation again for the electronic device power supply.
For technical scheme that the embodiment of the invention is provided clearer; Following combine the how power taking of load simultaneous power-switching circuit, see also Fig. 5, Fig. 5 shows load 60 and connects with the input of said power-switching circuit; Wherein, the two ends of 6,7 expression loads.The resistance Z1 that between the input of the output of filter circuit and comparator, connects, this resistance is used for step-down, and the voltage after the step-down is assumed to V
Sgn_bulkFor the two ends of the power supply of load and power-switching circuit power supply are expressed as live wire Live and zero line NUETRAL respectively, the voltage V of power supply
Main(t) with the voltage V at power-switching circuit two ends
Dimmer(t), the voltage V of variable load
Load(t) relation is:
V
main(t)＝V
dimmer(t)+V
Load(t)
The current i of power supply Live end
L(t) with the input current i of rectification circuit 10
L1(t), the input current i of switching device 20
L2(t) relation is:
i
L(t)＝i
L1(t)+i
L2(t)；
Zero cross detection circuit 301 detects the voltage of power supply in real time in the embodiment of the invention, when the voltage that detects power supply is 0, compares the voltage V that obtains after the output voltage step-down of filter circuit with regard to trigger comparator 302
Sgn_bulkWith reference voltage V
RefIf, V
Sgn_bulkLess than V
Ref, comparator control switch device is high impedance status, and switching device is the very short time behind the high impedance status, V
Main(t) deduct V
Dimmer(t) value is during greater than a terminal voltage among Fig. 6 (being the voltage of filter capacitor C in the load), and filter capacitor C is recharged, and electric current moment of flowing through a end becomes big; At this moment; The impedance of load from large to small, like this, the charging current that flows through filter capacitor in the load flows through the rectification circuit 10 in the power-switching circuit simultaneously; Rectification circuit 10 operating efficiency at this moment is the highest, and it is output as the electronic device power supply.Owing in the process that supply power voltage rises, (be t as shown in Figure 7 only
1-t
2In time period) just V can appear
Main(t) deduct V
Dimmer(t) value is greater than the situation of a terminal voltage among Fig. 6, so present embodiment is that 0 o'clock trigger comparator compares at voltage, the comparative result of comparator is V
Sgn_bulkLess than V
RefThe time become high impedance status with regard to the control switch device, make in the supply power voltage uphill process V
Main(t) deduct V
Dimmer(t) value is greater than among Fig. 6 during a terminal voltage, and the operating efficiency of rectification circuit 10 is the highest, can be the enough energy of electronic device supply.When comparator relatively obtains V
Sgn_bulkBe greater than or equal to V
RefThe time, represent that then power-switching circuit obtained enough energy, control circuit this moment control switch device no longer is by adjusting control circuit control switch device.
Wherein, reference voltage V
RefBe to be used to be provided with switching device when to be high impedance status; The concrete condition of the electronic device that it can be supplied power is as required set; For electronic device big power is provided if desired; What then reference voltage can be provided with is higher, if need be for electronic device does not provide big power, what then reference voltage can be provided with hangs down.
Be electricity-saving lamp (CFL) or LED Lamp as follows with the variable load, switching device is that MOSFETs is that example is described technical scheme provided by the invention in detail:
MOSFETs basic function is light modulation in this instance; The conducting of MOSFETs and shutoff can influence the voltage at CFL or LED Lamp load two ends; If promptly increase the ON time of MOSFETs; Then the voltage at CFL or LED Lamp load two ends can increase, and the brightness of CFL or LED Lamp also increases.
Zero cross detection circuit detects the voltage of power supply in real time, when voltage is zero, sends triggering signal to comparator, and trigger comparator is V relatively
Sgn_bulkWith V
Ref, when comparative result is V
Sgn_bulkLess than V
RefThe time, control MOSFETs is high impedance status (specifically can be that control MOSFETs pipe ends), rectifier bridge and filter capacitor C is arranged, the very short time after MOSFETs is high impedance status, V among CFL or the LED Lamp
Main(t) deduct V
Dimmer(t) value is during just greater than the voltage (voltage of filter capacitor C among the MOSFETs) of a end among Fig. 6, and the DC filter capacitor among CFL or the LED Lamp begins to be recharged, and electric current moment of flowing through a end becomes big; At this moment; The impedance of CFL or LED Lamp from large to small, like this, the charging current that flows through filter capacitor in the load flows through the rectification circuit 10 in the power-switching circuit simultaneously; Rectification circuit 10 operating efficiency at this moment is the highest, and it is output as the electronic device power supply.Work as V
Sgn_bulkBe greater than or equal to V
RefThe time; Represent that then power-switching circuit provides enough power for electronic device; Power-switching circuit need not continue from power supply, to have extracted voltage, can control MOSFETs by adjusting control circuit this moment and be low impedance state (specifically can be the conducting of control MOSFETs pipe) to realize dimming function.
Consult Fig. 8; Further embodiment of this invention provides a kind of power-switching circuit; This power-switching circuit has two ac input ends (being assumed to the first input end 1 and second input 2) and output 3, and this power-switching circuit comprises: switching device 10, rectification circuit 20, control circuit 30, filter circuit 40 and power-supply circuit 50 and adjusting control circuit 80;
Wherein, the functional description of switching device 10, rectification circuit 20, filter circuit 40 and power-supply circuit 50 is repeated no more at this with embodiment illustrated in fig. 3 similar.
Adjusting control circuit 80 is used for control switch device 10 and is high impedance status or low impedance state;
Comparator 302; Be used for when the output voltage that relatively obtains rectification circuit during less than threshold voltage; Send first triggering signal to adjusting control circuit, said first triggering signal is used to control adjusting control circuit, makes said adjusting control circuit control switch device be high impedance status; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage; Send second triggering signal to adjusting control circuit; Said second triggering signal is used to cancel the control of said comparator to adjusting control circuit, and promptly this moment, comparator was no longer controlled adjusting control circuit.Concrete; Comparator can compare the output voltage and a reference voltage of filter circuit, and when the output voltage of filter circuit during less than reference voltage, the output voltage of expression rectification circuit is less than said threshold voltage; Represent that power-switching circuit also do not get enough energy this moment; Switching device 10 should be high-impedance state, at this moment, sends first triggering signal to adjusting control circuit; Make adjusting control circuit control switch device be high impedance status, prevent that adjusting control circuit control switch device 10 does not get into low impedance state when power-switching circuit is also got enough energy; When the output voltage of filter circuit is greater than or equal to reference voltage; The output voltage of expression rectification circuit is greater than or equal to said threshold voltage, and represent that power-switching circuit got enough energy this moment, and switching device 10 can be in low impedance state; Send second triggering signal to adjusting control circuit this moment; So that the cancellation comparator is to the control of adjusting control circuit, promptly comparator has no longer been controlled adjusting control circuit, and adjusting control circuit is in normal operating conditions; So that adjusting control circuit can be in low impedance state by the control switch device, realize dimming function.
Need to prove that this control circuit can also comprise: zero cross detection circuit, be used for when the voltage of AC power or electric current are zero, trigger comparator compares.Like this, comparator specifically is used under the triggering of zero cross detection circuit, comparing the output voltage and the threshold voltage of rectification circuit, perhaps compares the output voltage and the reference voltage of filter circuit.
Comparator in the embodiment of the invention is at the output voltage that relatively obtains rectification circuit during less than threshold voltage; Then send triggering signal to adjusting control circuit; Make adjusting control circuit control switch device be high impedance status, switching device is kept high impedance status always when making power-switching circuit also not get enough energy, like this; Power-switching circuit just can extract enough energy from power supply, so that be the electronic device power supply; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage; Comparator is no longer controlled adjusting control circuit; Continue the control switch device by adjusting control circuit, like this, can either make power-switching circuit from power supply, extract enough voltage; Thereby, can realize light modulation again for the electronic device power supply.
More than the power-switching circuit that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a power-switching circuit is characterized in that, said power-switching circuit has two ac input ends;
Said power-switching circuit comprises: switching device, rectification circuit and control circuit;
Switching device is between two ac input ends of power-switching circuit; Said switching device is parallelly connected with two ac input ends of rectification circuit;
Rectification circuit is used for the alternating current that the ac input end of rectification circuit is imported is carried out rectification, output dc voltage;
Control circuit is used for the control switch device and is in high impedance status, till the energy of rectification circuit output reaches reference energy.
2. circuit according to claim 1 is characterized in that,
Said control circuit comprises:
Comparator is used for, controlling said switching device and being high impedance status during less than threshold voltage at the output voltage that relatively obtains rectification circuit; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, the impedance state of control switch device not.
3. circuit according to claim 2 is characterized in that,
Said power-switching circuit also comprises: adjusting control circuit is used for the control switch device and is high impedance status or low impedance state;
Said comparator, the output voltage that is used for relatively obtaining rectification circuit control said switching device and be high impedance status, and the blocking-up adjusting control circuit are to the controls of switching device during less than threshold voltage; When the output voltage that relatively obtains rectification circuit is equal to, or greater than threshold voltage, the impedance state of control switch device not.
4. circuit according to claim 2 is characterized in that,
Said power-switching circuit also comprises: adjusting control circuit is used for the control switch device and is high impedance status or low impedance state;
Said comparator; Be used at the output voltage that relatively obtains rectification circuit during less than threshold voltage; Send first triggering signal to adjusting control circuit, said first triggering signal is used to control adjusting control circuit, makes said adjusting control circuit control switch device be high impedance status; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, send second triggering signal to adjusting control circuit, said second triggering signal is used to cancel the control of said comparator to adjusting control circuit.
5. according to claim 3 or 4 described circuit, it is characterized in that said control circuit also comprises:
Zero cross detection circuit is used for when the voltage of AC power or electric current are zero, and trigger comparator compares, and wherein, AC power is the power supply for power-switching circuit and the power supply of variable load that is connected in series with power-switching circuit.
6. circuit according to claim 2 is characterized in that,
Said control circuit comprises: zero cross detection circuit and comparator,
Said zero cross detection circuit is used for when the voltage of AC power or electric current are zero, and trigger comparator compares; Wherein, AC power is the power supply for power-switching circuit and the power supply of variable load that is connected in series with power-switching circuit;
Said comparator is used under the triggering of zero cross detection circuit, and the output voltage that relatively obtains rectification circuit is controlled said switching device and is high impedance status during less than threshold voltage; When the output voltage that relatively obtains rectification circuit is greater than or equal to threshold voltage, the impedance state of control switch device not.
7. circuit according to claim 1 is characterized in that,
Said switching device is a semiconductor device.
8. circuit according to claim 1 is characterized in that,
Also comprise: filter circuit and power-supply circuit,
Said filter circuit is used for filtering is carried out in the output of rectification circuit;
Said power-supply circuit is used for voltage transitions is carried out in the output of filter circuit, the voltage after the output conversion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010624787.0A CN102545650B (en) | 2010-12-31 | 2010-12-31 | Power-switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010624787.0A CN102545650B (en) | 2010-12-31 | 2010-12-31 | Power-switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102545650A true CN102545650A (en) | 2012-07-04 |
| CN102545650B CN102545650B (en) | 2016-12-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441631A (en) * | 2002-01-17 | 2003-09-10 | 电灯专利信托有限公司 | Operation equipment for luminous diode |
| CN2626184Y (en) * | 2002-05-24 | 2004-07-14 | 星亮科技有限公司 | Light modulation device |
| CN1981425B (en) * | 2004-06-10 | 2010-07-21 | 卢特龙电子公司 | Apparatus and methods for regulating delivery of electrical energy |
| US20100231055A1 (en) * | 2001-07-06 | 2010-09-16 | Lutron Electronics Co., Inc. | Electronic control systems and methods |
-
2010
- 2010-12-31 CN CN201010624787.0A patent/CN102545650B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100231055A1 (en) * | 2001-07-06 | 2010-09-16 | Lutron Electronics Co., Inc. | Electronic control systems and methods |
| CN1441631A (en) * | 2002-01-17 | 2003-09-10 | 电灯专利信托有限公司 | Operation equipment for luminous diode |
| CN2626184Y (en) * | 2002-05-24 | 2004-07-14 | 星亮科技有限公司 | Light modulation device |
| CN1981425B (en) * | 2004-06-10 | 2010-07-21 | 卢特龙电子公司 | Apparatus and methods for regulating delivery of electrical energy |
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