CN201854475U - Light-emitting diode driving device - Google Patents
Light-emitting diode driving device Download PDFInfo
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- CN201854475U CN201854475U CN2010205434790U CN201020543479U CN201854475U CN 201854475 U CN201854475 U CN 201854475U CN 2010205434790 U CN2010205434790 U CN 2010205434790U CN 201020543479 U CN201020543479 U CN 201020543479U CN 201854475 U CN201854475 U CN 201854475U
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- 238000012544 monitoring process Methods 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to a light-emitting diode driving device with a high power factor, which comprises a first rectifying circuit, a switching circuit, a transformer, a second rectifying circuit and a diode, so as to drive a solid-state fan and a light-emitting diode module simultaneously, wherein the first rectifying circuit is coupled with a light dimming circuit; the switching circuit is coupled with the first rectifying circuit; the transformer comprises a primary side coupled with the switching circuit, a first secondary side and a second secondary side; the second rectifying circuit is coupled with the first secondary side of the transformer; and the diode is coupled with the second secondary side of the transformer. The light-emitting diode driving device correspondingly adjusts the wind speed produced by the solid-state fan according to the produced heat energy relative to the luminance of the light-emitting diode module; in the light-emitting diode driving device, an input capacitor is not needed to provide a stable DC power supply, and therefore, surge current caused by the input capacitor can be avoided, thereby realizing the high power factor.
Description
Technical field
The utility model relates to a kind of light emitting diode drive device, refers to a kind of tool High Power Factor especially, and can drive the light emitting diode drive device of solid-state fan and light emitting diode module simultaneously.
Background technology
Light-emitting diode (Light-Emitting Diode, LED) have power saving, the life-span is long, reaction speed is fast advantage, add that its volume is little, vibration resistance, be fit to the characteristic of volume production,, become main lighting apparatus so little by little replace conventional light source such as tungsten lamp, fluorescent lamp.Because the application of light-emitting diode more and more widely, how design stability and high efficiency LED driving circuit also are an important topic.
Usually the type of drive of light-emitting diode is directly to use the DC power supply of low-voltage, but if use AC power such as civil power that household socket provided, then needs just can make the light-emitting diode normal operation through power conversion circuit.One of LED driving circuit of extensive use at present be switched power supplier (Switching Mode Power Supply, SMPS).Generally speaking, the input of switched power supplier uses the input capacitance of bridge rectifier and high capacitance.Because this input capacitance only just can be recharged during near the crest voltage of input power supply or greater than the voltage of this input capacitance in the input power source voltage, so the time that this input capacitance can be recharged is very of short duration.That is to say, in the blink that this input capacitance can be recharged, the input power supply must provide pulse current to fill full this input capacitance accordingly, cause huge burst current (inrush current), so cause the electrical source power factor of switched power supplier to reduce, cause unnecessary waste of energy.
On the other hand, because light-emitting diode is a current driving element, its brightness and input power are approximately proportional.The heat energy that is produced during lumination of light emitting diode had a direct impact the luminous efficiency and the life-span of light-emitting diode.The luminous efficiency of light-emitting diode can reduce along with service time and number of times, too high connect surface temperature and then can cause the luminous efficiency of light-emitting diode to quicken decay, and reduce the useful life of light-emitting diode.Especially along with the increase of input power, though can promote the brightness of light-emitting diode, the also rapid increase of the heat energy of its generation.If the heat energy that light-emitting diode produces can't effectively shed, will seriously reduce the luminous efficiency and the useful life of light-emitting diode.
The utility model content
The utility model provides a kind of light emitting diode drive device, and it carries out light modulation by light adjusting circuit, and this drive unit comprises first rectification circuit, commutation circuit, transformer, second rectification circuit and diode.This is used for changing first rectification circuit of the AC power of this light adjusting circuit output with output high potential DC power supply, is coupled to this light adjusting circuit.This is used for switching this high potential DC power supply to produce the commutation circuit of high potential AC power, is coupled to this first rectification circuit.This transformer comprises: be used for receiving the primary side of this high potential AC power, be coupled to this commutation circuit; In order to produce first secondary side of superelevation current potential AC power according to the high potential AC power of this primary side of this transformer; And in order to produce second secondary side of electronegative potential AC power according to the high potential AC power of this primary side of this transformer.Be used for this superelevation current potential AC power is converted to superelevation current potential DC power supply,, be coupled to this first secondary side of this transformer with second rectification circuit of this superelevation current potential direct current power supply to solid-state fan.This is used for this electronegative potential AC power is converted to the low-potential direct power supply, this low-potential direct power supply is supplied to the diode of light emitting diode module, is coupled to this second secondary side of this transformer.
According to described light emitting diode drive device, this light emitting diode drive device also comprises: in order to the electric current information of this light emitting diode module is feedback to the feedback circuit of this commutation circuit, be coupled between this commutation circuit and this light emitting diode module.
According to described light emitting diode drive device, this light emitting diode drive device also comprises and is used for monitoring that this light adjusting circuit flows to the monitor unit of the electric current of this first rectification circuit, is coupled to this first rectification circuit; And the electric current that is used for flowing to this first rectification circuit to this light adjusting circuit when this monitoring unit monitors reduces the electric current holding circuit of the impedance of this drive unit during less than first predetermined value, is coupled to this monitor unit.
According to described light emitting diode drive device, this transformer is a flyback transformer.
According to described light emitting diode drive device, this light adjusting circuit is a bidirectional silicon-controlled rectifier.
According to described light emitting diode drive device, this light emitting diode drive device also comprises: the filter in order to the electromagnetic interference of the AC power of eliminating the output of this light adjusting circuit is coupled between this light adjusting circuit and this first rectification circuit.
According to described light emitting diode drive device, this first rectification circuit is a bridge rectifier.
According to described light emitting diode drive device, this commutation circuit is a semi-bridge switching circuit.
Light emitting diode drive device of the present utility model can drive solid-state fan and light emitting diode module simultaneously, and come the corresponding wind speed that solid-state fan produces of adjusting, so can effectively light emitting diode module be dispelled the heat and avoid consuming unnecessary electric energy according to heat energy that light emitting diode module produced.Light emitting diode drive device of the present utility model does not need input capacitance that the galvanic current source is provided, and the burst current that can avoid input capacitance to cause.Therefore light emitting diode drive device of the present utility model has High Power Factor, can reduce unnecessary power consumption.In addition, when utilizing light adjusting circuit to control the bright and dark light that light emitting diode module sends, light emitting diode drive device of the present utility model can detect electric current that light adjusting circuit receives whether less than light adjusting circuit required keep electric current, and it is required when keeping electric current less than it at electric current that light adjusting circuit received, light adjusting circuit is carried out the action of current compensation, to guarantee the normal operation of light adjusting circuit.
Can be further understood by following description of drawings and embodiment detailed description in advantage of the present utility model and spirit.
Description of drawings
Fig. 1 is the block functional diagram of an embodiment of light emitting diode drive device of the present utility model.
Fig. 2 oscillogram that different elements is produced during for the running of the light emitting diode drive device of the utility model Fig. 1.
Fig. 3 is the block functional diagram of another embodiment of light emitting diode drive device of the present utility model.
Embodiment
Please refer to Fig. 1.Fig. 1 is the block functional diagram of an embodiment of light emitting diode drive device 100 of the present utility model.As shown in Figure 1, light adjusting circuit 500 is by light emitting diode drive device 100 driven for emitting lights diode modules 700, in other words, light adjusting circuit 500 is adjusted the light and shade of the light that light emitting diode module 700 are sent with control light emitting diode module 700 via light emitting diode drive device 100.Light emitting diode drive device 100 comprises first rectification circuit 102, commutation circuit 104, transformer 106, second rectification circuit 108 and diode 110.First rectification circuit 102 is coupled to light adjusting circuit 500, is used for changing the AC power P that light adjusting circuit 500 is exported
ACWith output high potential DC power supply P
DC_HCommutation circuit 104 is coupled to first rectification circuit 102, is used for switching high potential DC power supply P
DC_H, to produce high potential AC power P
AC_HTransformer 106 is coupled to commutation circuit 104.Transformer 106 comprises primary side 106a, the first secondary side 106b1 and the second secondary side 106b2.The primary side 106a of transformer 106 is coupled to commutation circuit 104, is used for receiving high potential AC power P
AC_HThe first secondary side 106b1 of transformer 106 is according to the high potential AC power P of primary side 106a
AC_HProduce superelevation current potential AC power P
AC_UHThe second secondary side 106b2 of transformer 106 is according to the high potential AC power P of primary side 106a
AC_HProduce electronegative potential AC power P
AC_L Second rectification circuit 108 is coupled to the first secondary side 106b1 of transformer 106, is used for superelevation current potential AC power P
AC_UHBe converted to superelevation current potential DC power supply P
DC_UH, and with superelevation current potential DC power supply P
DC_UHBe supplied to solid-state fan 600.Diode 110 is coupled to the second secondary side 106b2 of transformer 106, is used for electronegative potential AC power P
AC_LBe converted to low-potential direct power supply P
DC_L, with low-potential direct power supply P
DC_LBe supplied to light emitting diode module 700.
In an embodiment of the present utility model, light adjusting circuit 500 can comprise bidirectional silicon-controlled rectifier (TRIAC), commutation circuit 104 can comprise half-bridge (half bridge) commutation circuit, full-bridge (full bridge) commutation circuit or flyback (flyback) commutation circuit, transformer 106 can comprise flyback transformer, and first rectification circuit 102 can comprise bridge rectifier.Second rectification circuit 108 can comprise the voltage multiplie (voltage multiplier) that has rectification and filter function concurrently; Voltage multiplie can be increased to the voltage of output the multiple of the crest voltage of input.For instance, second rectification circuit 108 can be voltage double, three voltage multiplies or quadrupler etc., but not as limit, any such as can be the voltage of the output of transformer 106 (as superelevation current potential AC power P
AC_UHVoltage) be promoted to the crest voltage of its input (as high potential AC power P
AC_HCrest voltage) the circuit of a certain multiple all can be in order to implement second rectification circuit 108.
Please refer to Fig. 2.The oscillogram that different elements was produced when Fig. 2 operated for light emitting diode drive device 100 of the present utility model.Light emitting diode drive device 100 receives AC power P via light adjusting circuit 500
s(as the civil power that household plug outlet provided), and light adjusting circuit 500 can change the AC power P that inputs to light emitting diode drive device 100
sThe angle of flow (fire angle), to produce AC power P
ACTo first rectification circuit 102.First rectification circuit 102 is with AC power P
ACWaveform transfer same polarity to, with output high potential DC power supply P
DC_HTo commutation circuit 104.Commutation circuit 104 sees through high potential DC power supply P
DC_HRepeat forward and oppositely between on/off switch (switching) action, with the high potential AC power P of output high frequency
AC_H Primary side 106a to transformer 106.Commutation circuit 104 is carried out the switching frequency of ON/OFF action for default, and for instance, switching frequency can be 1kHz.Transformer 106 is via the high potential AC power P of its first secondary side 106b1 with the high frequency of primary side 106a
AC_HBoost and be the superelevation current potential AC power P of high frequency
AC_UH, simultaneously via the high potential AC power P of its second secondary side 106b2 with the high frequency of primary side 106a
ACStep-down is the electronegative potential AC power P of high frequency
AC_L Second rectification circuit 108 is with superelevation current potential AC power P
AC_UHBe converted to superelevation current potential DC power supply P
DC_UH, and be supplied to solid-state fan 600.Diode 110 is with electronegative potential AC power P
AC_LBe converted to low-potential direct power supply P
DC_L, and be supplied to light emitting diode module 700.
Light emitting diode drive device 100 of the present utility model drives solid-state fan 600 and light emitting diode module 700 simultaneously by transformer 106.Solid-state fan 600 usefulness are helped light emitting diode module 700 heat radiations.Solid-state fan 600 has multinomial characteristics such as power saving, peace and quiet, volume be little.In addition, solid-state fan 600 there is no movable element, and therefore solid-state fan 600 is easy to safeguard.Because transformer 106 provides the power supply of light emitting diode module 700 and solid-state fan 600 simultaneously, when therefore light adjusting circuit 500 was adjusted the brightness of light emitting diode module 700 via light emitting diode drive device 100, the wind speed that solid-state fan 600 produces was also adjusted thereupon.For instance, when light adjusting circuit 500 was shinny via the brightness of light emitting diode drive device 100 adjustment light emitting diode module 700, light emitting diode module 700 produced more heat energy, corresponding the increasing of wind speed that solid-state fan 600 produces; When light adjusting circuit 500 was adjusted the brightness deepening of light emitting diode module 700 via light emitting diode drive device 100, light emitting diode module 700 produced less heat energy, and the wind speed correspondence that solid-state fan 600 produces weakens.So, the corresponding heat energy that produces of brightness of wind speed that solid-state fan 600 produces and light emitting diode module 700 approximately can be proportional, the wind speed deficiency that solid-state fan 600 produces in the time of can avoiding the more heat energy of light emitting diode module 700 shinny generations, or situation such as the light emitting diode module 700 deepenings wind speed that solid-state fan 600 produces when producing less heat energy is excessive, that is light emitting diode drive device 100 of the present utility model can come the corresponding wind speed that solid-state fan 600 produces of adjusting according to the heat energy that light emitting diode module 700 produces, effectively with light emitting diode module 700 heat radiation promoting its luminous efficiency and useful life, and can avoid consuming unnecessary electric energy.
The electric current that is received when light adjusting circuit 500 less than light adjusting circuit 500 required keep electric current (holdingcurrent) time, light adjusting circuit 500 can't normal operation, therefore, light emitting diode drive device 100 of the present utility model also can provide current compensation mechanism, to guarantee the running of light adjusting circuit 500.As shown in Figure 1, light emitting diode drive device 100 comprises monitor unit 121 and electric current holding circuit 122 in addition.Monitor unit 121 is coupled to first rectification circuit 102, is used for monitoring that light adjusting circuit 500 flows to the electric current of first rectification circuit 102.Electric current holding circuit 122, be coupled to monitor unit 121, be used for when monitor unit 121 monitor electric current that light adjusting circuit 500 flows to first rectification circuit 102 less than predetermined value (as less than light adjusting circuit 500 required keep electric current) time, light adjusting circuit 500 is carried out current compensation.In an embodiment of the present utility model, when the electric current that flows to first rectification circuit 102 more than or equal to light adjusting circuit 500 required keep electric current the time, monitor unit 121 Control current holding circuits 122 are closed condition; When monitor unit 121 monitor electric current that light adjusting circuit 500 flows to first rectification circuit 102 less than light adjusting circuit 500 required keep electric current the time, monitor unit 121 Control current holding circuits 122 are conducting state.When electric current holding circuit 122 when closing, electric current holding circuit 122 is can any influence or effect not arranged to light emitting diode drive device 100.When electric current holding circuit 122 is conducting, electric current holding circuit 122 produces relation in parallel with first rectification circuit 102 in fact, so the impedance of light emitting diode drive device 100 descends, that is to say the impedance of the light emitting diode drive device 100 when the impedance meeting of the light emitting diode drive device 100 during 122 conductings of electric current holding circuit is closed less than electric current holding circuit 122.According to ohm theorem (Ohm ' s Law), when voltage for fixedly the time, resistance decreasing then causes electric current can become big; Therefore, when electric current holding circuit 122 during for conducting, the impedance decline of light emitting diode drive device 100 and high potential DC power supply PDC_H is corresponding increases is so that light adjusting circuit 500 maintains the state of normal unlatching/running.
Please refer to Fig. 3.Fig. 3 is the block functional diagram of another embodiment of light emitting diode drive device 200 of the present utility model.Light emitting diode drive device 200 is similar in appearance to light emitting diode drive device 100, and different is that light emitting diode drive device 200 comprises filter 202 and feedback circuit 204 in addition.Other element of light emitting diode drive device 200 and function mode are not given unnecessary details in this similar in appearance to light emitting diode drive device 100.Filter 202 can be electromagnetic interference, and (Electromagnetic Disturbance, EMI) filter, and being coupled between the light adjusting circuit 500 and first rectification circuit 102 is in order to the electromagnetic interference of the AC power P-AC that eliminates light adjusting circuit 500 outputs.Feedback circuit 204 is coupled between commutation circuit 104 and the light emitting diode module 700, in order to the electric current information of light emitting diode module 700 is feedback to commutation circuit 104, make light emitting diode drive device 200 can control the electric current of light emitting diode module 700 accordingly.For instance, its impedance diminishes when light emitting diode module 700 wears out, and the electric current of light emitting diode module 700 is corresponding to be increased so flow to, thereby the aging speed of accelerated luminescence diode modules 700.In this case, feedback circuit 202 can be feedback the electric current information of light emitting diode module 700 to commutation circuit 104, so that the electric current of light emitting diode drive device 200 corresponding control light emitting diode module 700 makes its unlikely increase, to slow down the aging speed of light emitting diode module 700.
In sum, light emitting diode drive device of the present utility model can drive solid-state fan and light emitting diode module simultaneously, and come the corresponding wind speed that solid-state fan produces of adjusting, so can effectively light emitting diode module be dispelled the heat and avoid consuming unnecessary electric energy according to heat energy that light emitting diode module produced.Light emitting diode drive device of the present utility model does not need input capacitance that the galvanic current source is provided, and the burst current that can avoid input capacitance to cause.Therefore light emitting diode drive device of the present utility model has High Power Factor, can reduce unnecessary power consumption.In addition, when utilizing light adjusting circuit to control the bright and dark light that light emitting diode module sends, light emitting diode drive device of the present utility model can detect electric current that light adjusting circuit receives whether less than light adjusting circuit required keep electric current, and it is required when keeping electric current less than it at electric current that light adjusting circuit received, light adjusting circuit is carried out the action of current compensation, to guarantee the normal operation of light adjusting circuit.
According to the detailed description of above embodiment, hope can be known description feature of the present utility model and spirit more, and is not to come the utility model is limited with above-mentioned disclosed embodiment.
Claims (8)
1. light emitting diode drive device, it carries out light modulation by light adjusting circuit, it is characterized in that this drive unit comprises:
Be used for changing first rectification circuit of the AC power of this light adjusting circuit output, be coupled to this light adjusting circuit with output high potential DC power supply;
Be used for switching this high potential DC power supply to produce the commutation circuit of high potential AC power, be coupled to this first rectification circuit;
Transformer comprises:
Be used for receiving the primary side of this high potential AC power, be coupled to this commutation circuit;
In order to produce first secondary side of superelevation current potential AC power according to the high potential AC power of this primary side of this transformer; And
In order to produce second secondary side of electronegative potential AC power according to the high potential AC power of this primary side of this transformer;
Be used for this superelevation current potential AC power is converted to superelevation current potential DC power supply,, be coupled to this first secondary side of this transformer with second rectification circuit of this superelevation current potential direct current power supply to solid-state fan; And
Be used for this electronegative potential AC power is converted to the low-potential direct power supply,, be coupled to this second secondary side of this transformer this low-potential direct power supply is supplied to the diode of light emitting diode module.
2. light emitting diode drive device according to claim 1, it is characterized in that, this light emitting diode drive device also comprises: in order to the electric current information of this light emitting diode module is feedback to the feedback circuit of this commutation circuit, be coupled between this commutation circuit and this light emitting diode module.
3. light emitting diode drive device according to claim 1 is characterized in that: this light emitting diode drive device also comprises
Be used for monitoring that this light adjusting circuit flows to the monitor unit of the electric current of this first rectification circuit, be coupled to this first rectification circuit; And
The electric current that is used for flowing to this first rectification circuit to this light adjusting circuit when this monitoring unit monitors reduces the electric current holding circuit of the impedance of this drive unit during less than first predetermined value, is coupled to this monitor unit.
4. light emitting diode drive device according to claim 1 is characterized in that: this transformer is a flyback transformer.
5. light emitting diode drive device according to claim 1 is characterized in that: this light adjusting circuit is a bidirectional silicon-controlled rectifier.
6. light emitting diode drive device according to claim 1, it is characterized in that, this light emitting diode drive device also comprises: the filter in order to the electromagnetic interference of the AC power of eliminating the output of this light adjusting circuit is coupled between this light adjusting circuit and this first rectification circuit.
7. light emitting diode drive device according to claim 1 is characterized in that: this first rectification circuit is a bridge rectifier.
8. light emitting diode drive device according to claim 1 is characterized in that: this commutation circuit is a semi-bridge switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205434790U CN201854475U (en) | 2010-09-16 | 2010-09-16 | Light-emitting diode driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205434790U CN201854475U (en) | 2010-09-16 | 2010-09-16 | Light-emitting diode driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854475U true CN201854475U (en) | 2011-06-01 |
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ID=44096852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205434790U Expired - Fee Related CN201854475U (en) | 2010-09-16 | 2010-09-16 | Light-emitting diode driving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201854475U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836407A (en) * | 2012-11-27 | 2014-06-04 | 建准电机工业股份有限公司 | Lighting device with dimming and heat dissipation functions and fan thereof |
| TWI478628B (en) * | 2011-06-17 | 2015-03-21 | Rab Lighting Inc | Light-cell controlled light-emitting diode driver circuit |
| US10306717B1 (en) | 2018-04-20 | 2019-05-28 | Asian Power Devices Inc. | Flicker-free LED driving apparatus and voltage regulating method thereof |
-
2010
- 2010-09-16 CN CN2010205434790U patent/CN201854475U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI478628B (en) * | 2011-06-17 | 2015-03-21 | Rab Lighting Inc | Light-cell controlled light-emitting diode driver circuit |
| CN103836407A (en) * | 2012-11-27 | 2014-06-04 | 建准电机工业股份有限公司 | Lighting device with dimming and heat dissipation functions and fan thereof |
| CN103836407B (en) * | 2012-11-27 | 2015-12-23 | 建准电机工业股份有限公司 | Lighting device with dimming and heat dissipation functions and fan thereof |
| US10306717B1 (en) | 2018-04-20 | 2019-05-28 | Asian Power Devices Inc. | Flicker-free LED driving apparatus and voltage regulating method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20150916 |
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| EXPY | Termination of patent right or utility model |