CN101404846B - Real-time compensation apparatus for input voltage fluctuation in power LED driving system - Google Patents
Real-time compensation apparatus for input voltage fluctuation in power LED driving system Download PDFInfo
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- CN101404846B CN101404846B CN2008102351806A CN200810235180A CN101404846B CN 101404846 B CN101404846 B CN 101404846B CN 2008102351806 A CN2008102351806 A CN 2008102351806A CN 200810235180 A CN200810235180 A CN 200810235180A CN 101404846 B CN101404846 B CN 101404846B
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Abstract
The invention relates to a real time compensating mechanism towards input voltage hunting in a power LED drive system. The real time compensating mechanism comprises a commercial power input circuit, a PWM signal generating circuit, an output drive circuit, a power LED load circuit and a feedback sampling circuit. The output drive circuit amplifies a PWM signal from the PWM signal generating circuit and forms a drive signal. The feedback sampling circuit samples a load current fluctuation signal of the power LED load circuit. An error treatment circuit is arranged between the commercial power input circuit and the PWM signal generating circuit and comprises an input voltage detection circuit and an error amplifying circuit. The input voltage detection circuit is used for collecting output signals of the commercial power input circuit. An output end of the input voltage detection circuit is connected with a first input end of the error amplifying circuit, and a second input end of the error amplifying circuit is connected with the output end of the feedback sampling circuit. The output end of the error amplifying circuit is connected with an input end of the PWM signal generating circuit.
Description
Technical field
The present invention relates to a kind of in the power LED driving system to the real-time compensation apparatus of input voltage fluctuation, to eliminate the influence of input voltage fluctuation to output current, for power LED load special meaning is arranged, can obtain the brightness output of stable and consistent more output current required precision strictness.
Background technology
Since " energy crisis " that occur the seventies in last century, countries in the world government is all wideling popularize energy-conservation high energy efficiency project and product, throws light on and display system exactly in one of them important popularization field.Since invention and the research expansion greatly that formed LED application since the nineties of the LED eighties in last century, accelerated the footwork that the LED illumination is used, the street lighting of existing domestic city has been used the power LED lighting technology at present.
But the flicker problem that a subject matter following the power LED illumination to use is exactly LED.Well-known LED is a kind of emitting components of current drive-type, exactly because and to cause the reason of flicker be the electric current instability that flows through LED, and cause in the unsettled reason of the electric current that flows through LED very important a kind of be the fluctuation of input line voltage.Common power LED drive circuit is to provide stable drive current by the mode that load feedback formation PWM controls for power LED, the disadvantage of this mode just is that load or power source change need can obtain adjusting and stablizing through several pwm signal cycles, and adjust during this period of time in the drive current of LED will occur fluctuating, and then produce the flicker that naked eyes can be discovered, make the people produce sense of discomfort.Fig. 1 and Fig. 2 have just shown the circuit system structure block diagram and the typical circuit figure of the prototype plant that has this shortcoming
Summary of the invention
The invention provides in a kind of power LED driving system real-time compensation apparatus to input voltage fluctuation, can't eliminate input voltage fluctuation in real time at the system feedback that runs in the power LED driving system, thereby cause the problem that during feedback adjusting, fluctuates of the drive current of power LED, this real-time compensation apparatus is by monitoring in real time the drive system input voltage and the error amplifier of the change component drawing-in system of input voltage being carried out computing, output voltage to error amplifier is adjusted in real time, with of the influence of real-Time Compensation input voltage fluctuation, can obtain the brightness output of stable and consistent more to the drive current of power LED.
The present invention adopts following technical scheme:
In a kind of power LED driving system to the real-time compensation apparatus of input voltage fluctuation, comprise: 220V civil power input circuit, pwm signal generation circuit, output driving circuit, power LED load circuit and feedback sampling circuit, the output of pwm signal generation circuit is connected with the input of output driving circuit, the output of output driving circuit is connected with the input of power LED load circuit, output driving circuit amplifies and forms drive signal to the pwm signal from pwm signal generation circuit, export to the power LED load circuit, be used for driving power LED load circuit, described feedback sampling circuit is used to gather the load current fluctuation signal of power LED load circuit, between 220V civil power input circuit and pwm signal generation circuit, be provided with the Error processing circuit, described Error processing circuit comprises input voltage detection circuit and error amplifying circuit, wherein, input voltage detection circuit is used to gather the output signal of 220V civil power input circuit, the output of input voltage detection circuit is connected with the first input end of error amplifying circuit, second input of error amplifying circuit is connected with the output of feedback sampling circuit, and the output of error amplifying circuit is connected with the input of pwm signal generation circuit.
The system's input voltage that is provided by the civil power input circuit has power network fluctuation, can handle in real time this fluctuation in the Error processing circuit.The Error processing circuit comprises input voltage detection module and error amplifying circuit.The input voltage detection module comprise two with series system be connected in system's input voltage and systematically the node potential between first resistance R 1 between the current potential and second resistance R, 2, the first resistance R 1 and second resistance R 2 output to error amplifying circuit as the input voltage sampled signal VS of system.Error amplifying circuit comprises voltage overlaying circuit and error amplifier.The input signal of voltage overlaying circuit is from the input voltage sampled signal VS of input voltage detection circuit output, and output voltage superposed signal, the voltage superposed signal outputs to the end of oppisite phase of error amplifier, the positive terminal of error amplifier receives the feedback signal FB from feedback sampling circuit, and process error amplification generation output signal is error amplification level signal EA.Voltage overlaying circuit in the error amplifying circuit comprises NMOS pipe MN1, the 2nd NMOS manages MN2, the one PMOS manages MP1, the 2nd PMOS pipe MP2 and resistance R 3, the grid termination of the one NMOS pipe MN1 is subjected to the voltage sampling signal VS from input voltage detection circuit output, the grid termination of the 2nd NMOS pipe MN2 is subjected to reference voltage, the one NMOS manages MN1, source end short circuit and the ground connection of the 2nd NMOS pipe MN2, the one NMOS manages MN1, the drain terminal short circuit of the 2nd NMOS pipe MN2 also connects the drain terminal that a PMOS manages MP1, the drain terminal short circuit of the grid end of the one PMOS pipe MP1 and PMOS pipe MP1 self, its source terminating systems input voltage, form a mirror current source, the grid end short circuit of the grid end of the 2nd PMOS pipe MP2 and PMOS pipe MP1, its source terminating systems input voltage, the end of drain terminal connecting resistance R3, resistance R 3 other end ground connection, the economize on electricity current potential that the 2nd PMOS pipe MP2 drain terminal and resistance R 3 are joined is the voltage superposed signal of output, and it outputs to the end of oppisite phase of error amplifier.
Input voltage is carried out real-time sampling and obtains one being used for the component signal that superposes with reference voltage by the input voltage detection module, the superpose end of oppisite phase of the signal error originated from input amplifier after the computing of this component signal and reference voltage, the in-phase end of the feedback signal error originated from input amplifier of feedback sampling circuit.The output signal of error amplifier is exactly to have included the real-Time Compensation signal of input voltage fluctuation like this.
The output signal of Error processing circuit that has the real-Time Compensation information of input voltage fluctuation outputs in the pwm signal generation circuit, to produce the pwm signal of suitable duty ratio, therefore needn't wait until the variation of the duty ratio of several system switching cycles adjustment caused pwm signal of feedback signal afterwards, include the real-Time Compensation information of input voltage fluctuation in this pwm signal.At this moment pwm signal outputs to output driving circuit again and produces load drive signal, driving power LED load circuit.Driving situation with load feeds back to the Error processing circuit to realize the control of system's loop through feedback sampling circuit simultaneously.
For the improvement of the control system of prototype plant is to have added input voltage detection module and voltage overlaying circuit on the basis of the error amplifier of prototype structure.The input voltage detection module carries out in real time to the sampling of the fluctuation of input voltage, so the variation that the reference voltage output (and prototype plant need by adjust the output of error amplifier through the variation of several PWM week after date feedback sample signals of reponse system) that is superimposed with the error amplifier that obtains behind the real-time sampling signal of fluctuation of this input voltage just can the real-Time Compensation input voltage is to the influence of final LED drive current.
Beneficial effect:
Adjust the output of Error processing circuit by the fluctuation of real-time sampling system input voltage, acquisition has the Error processing circuit output signal to input voltage real-Time Compensation information, and then generation has input voltage real-Time Compensation information pwm signal, with the load drive signal that has input voltage real-Time Compensation information, thereby realize the adjustment of output load current more rapidly and efficiently, make output current reach stable, and then obtain the power LED electric current output of stable and consistent more, eliminated effectively because the fluctuation of the power LED drive current that the input voltage ripple of power network causes.
Description of drawings
Fig. 1 prototype plant system architecture diagram.
Fig. 2 prototype plant circuit theory diagrams.
Fig. 3 contrive equipment system architecture diagram.
Fig. 4 contrive equipment circuit theory diagrams.
Embodiment
In a kind of power LED driving system to the real-time compensation apparatus of input voltage fluctuation, comprise: 220V civil power input circuit 1, pwm signal generation circuit 3, output driving circuit 4, power LED load circuit 5 and feedback sampling circuit 6, the output of pwm signal generation circuit 3 is connected with the input of output driving circuit 4, the output of output driving circuit 4 is connected with the input of power LED load circuit 5,4 pairs of pwm signals from pwm signal generation circuit 3 of output driving circuit amplify and form drive signal, export to power LED load circuit 5, be used for driving power LED load circuit 5, described feedback sampling circuit 6 is used to gather the load current fluctuation signal of power LED load circuit 5, it is characterized in that, between 220V civil power input circuit 1 and pwm signal generation circuit 3, be provided with Error processing circuit 2, described Error processing circuit 2 comprises input voltage detection circuit 7 and error amplifying circuit 8, wherein, input voltage detection circuit 7 is used to gather the output signal of 220V civil power input circuit 1, the output of input voltage detection circuit 7 is connected with the first input end of error amplifying circuit 8, second input of error amplifying circuit 8 is connected with the output of feedback sampling circuit 6, and the output of error amplifying circuit 8 is connected with the input of pwm signal generation circuit 3.
Described input voltage detection circuit 7 comprises with series system and is connected in system's input voltage and systematically first resistance R 1 between the current potential and second resistance R 2, with the output of the connected node between first resistance R 1 and second resistance R 2 as input voltage detection circuit 7.
Described error amplifying circuit 8 comprises:
-voltage overlaying circuit, the input of voltage overlaying circuit be as the first input end of error amplifying circuit 8,
-error amplifier, the inverting input of error amplifier is connected with the output of described voltage overlaying circuit, the normal phase input end of error amplifier is as second input of error amplifying circuit 8, and the output of error amplifier is as the output of error amplifying circuit 8.
Described voltage overlaying circuit comprises NMOS pipe MN1, the 2nd NMOS manages MN2, the one PMOS manages MP1, the 2nd PMOS pipe MP2 and a resistance R 3, the grid end of the one NMOS pipe MN1 is as the input of voltage overlaying circuit, the grid termination reference voltage of the 2nd NMOS pipe MN2, source end short circuit and the ground connection of the one NMOS pipe MN1 and the 2nd NMOS pipe MN2, the drain terminal short circuit of the one NMOS pipe MN1 and the 2nd NMOS pipe MN2 also is connected the drain terminal that a PMOS manages MP1, the drain terminal short circuit of the grid end of the one PMOS pipe MP1 and PMOS pipe MP1 self, the source terminating systems input voltage of the one PMOS pipe MP1, form a mirror current source, the grid end short circuit of the grid end of the 2nd PMOS pipe MP2 and PMOS pipe MP1, the source terminating systems input voltage of the 2nd PMOS pipe MP2, the end of the drain terminal connecting resistance R3 of the 2nd PMOS pipe MP2, the other end ground connection of resistance R 3, the drain terminal of the 2nd PMOS pipe MP2 and the node that resistance R 3 is joined are as the output of voltage overlaying circuit.
With reference to the accompanying drawings, the present invention is made more detailed explanation:
Fig. 3 is the system architecture diagram of preferred implementation of the real-time compensation apparatus of a kind of input voltage fluctuation to the great power LED drive system of the present invention, comprise 220V civil power input circuit 1, Error processing circuit 2, pwm signal generation circuit 3, output driving circuit 4, power LED load circuit 5 and feedback sampling circuit 6 wherein also comprise two submodules: input voltage detection module 7 and error amplifier 8 in the Error processing circuit 2.
System's input voltage that this device provides civil power input circuit 1 is monitored in real time and by input voltage detection module 7 error amplifier 8 of the change component drawing-in system of input voltage is carried out computing, and the output voltage EA of error amplifier is adjusted in real time.Adjusted EA signal is delivered in the pwm signal generation circuit 3, and with the pwm signal (pulse-width signal) that produces suitable duty ratio, this pwm signal input and output drive circuit 4 again produces load drive signal, driving power LED load circuit 5.Driving situation with load feeds back to Error processing circuit 2 to realize the control of system's loop through feedback sampling circuit 6 simultaneously.
The circuit theory diagrams of the preferred implementation of the real-time compensation apparatus of a kind of input voltage fluctuation to the great power LED drive system of Fig. 4 the present invention.Civil power 220V alternating current obtains the direct current half-wave voltage through a full-bridge rectifier, passes through the Filtering Processing of input filter capacitor again, has obtained a comparatively level and smooth DC stabilization input voltage VIN, and this part function is realized by civil power input circuit 1.
The principle of input voltage detection module 7 is by suitable electric resistance partial pressure a linear component of input voltage to be sampled out, obtains the real-time component of a VIN, and the real-time component of this VIN and reference voltage are the magnitudes of voltage of an order of magnitude.Real-time component and the reference voltage of VIN are superposeed with voltage overlaying circuit, obtained a reference voltage signal that contains the real-time component of VIN, and send into the end of oppisite phase of error amplifier, the forward end of error amplifier is feedback voltage signal FB, and this signal back is labor again.Just included the real time information of VIN variation in the error level EA signal through the error amplifier amplification like this, do not had in the EA signal of the real time information that this VIN changes in prototype example circuit theory diagrams shown in Figure 2.This point is an innovative point of the present invention.
Pwm signal generation circuit 3 comprises PWM comparator and oscillator, the positive terminal of PWM comparator receives the EA signal of the real time information that reflection VIN changes as the input of pwm signal generation circuit 3 and this input, the backward end of PWM comparator receives the triangular signal that is produced by oscillator, and then producing a pwm pulse signal that particular duty cycle is arranged, this pwm pulse signal is as the signal of pwm signal generation circuit 3.Pwm signal is sent into output driving circuit 4, by driving amplifier the driving force of PWM is amplified, and the control switch metal-oxide-semiconductor carries out switch by the duty ratio of PWM, and then produces the drive signal with enough driving forces and be used for driving power LED load circuit 5.
Power LED load circuit 5 is made up of output filter circuit and power LED, output filter circuit is accepted the signal by the VIN of switch MOS pipe modulation, and driving voltage reduced to the suitable voltage that satisfies the required electric current of driving power LED, power LED is luminous under the driving of suitable electric current, realizes the effect of illumination.What be used for setting power LED drive current is that feedback sampling circuit 6 is a feedback resistance in a preferred embodiment, institute's making alive is exactly the reference voltage signal that contains the real-time component of VIN after system's loop feedback is stable on this resistance, has so just realized the feedback stability output of system.
When system's input voltage changes, suppose it is upwards fluctuation, if prototype circuit shown in Figure 2, this moment, system also kept the duty ratio of input voltage fluctuation pwm signal before, therefore be used for the output voltage of driving power LED through filtering also uprises thereupon, the drive current of power LED also becomes big like this, the voltage FB that is added on the feedback resistance also uprises, and this moment, reference voltage was not change with system's input voltage, so the EA signal also can uprise, the low level duty ratio of pwm signal will diminish like this, and the switch MOS pipe is opened by the low level of pwm signal just, the energy that is transported to output filter circuit by the switch MOS pipe will tail off like this, therefore the electric current of driving power LED also can diminish, and the electric current of driving power LED will be got back to input voltage variation state before after several cycles like this.Added input voltage detection module 7 in the circuit of preferred implementation as shown in Figure 4 now, when input voltage uprises once more, the fluctuate superposed signal of real-time component and reference voltage of VIN that contains that is sent to the end of oppisite phase of error amplifier also uprises, thereby feasible script is owing to the trend of uprising of the EA signal that FB voltage uprises is contained, therefore the shake of the LED brightness that has also caused with regard to having realized the real-Time Compensation input voltage fluctuation, obtain the LED electric current output of stable and consistent more, also just eliminated because the flickering of the LED that the input voltage ripple of power network causes.
Claims (2)
- In the power LED driving system to the real-time compensation apparatus of input voltage fluctuation, comprise: 220V civil power input circuit (1), pwm signal generation circuit (3), output driving circuit (4), power LED load circuit (5) and feedback sampling circuit (6), the output of pwm signal generation circuit (3) is connected with the input of output driving circuit (4), the output of output driving circuit (4) is connected with the input of power LED load circuit (5), output driving circuit (4) amplifies and forms drive signal to the pwm signal from pwm signal generation circuit (3), export to power LED load circuit (5), be used for driving power LED load circuit (5), described feedback sampling circuit (6) is used to gather the load current fluctuation signal of power LED load circuit (5), it is characterized in that, between 220V civil power input circuit (1) and pwm signal generation circuit (3), be provided with Error processing circuit (2), described Error processing circuit (2) comprises input voltage detection circuit (7) and error amplifying circuit (8), wherein, input voltage detection circuit (7) is used to gather the output signal of 220V civil power input circuit (1), the output of input voltage detection circuit (7) is connected with the first input end of error amplifying circuit (8), second input of error amplifying circuit (8) is connected with the output of feedback sampling circuit (6), the output of error amplifying circuit (8) is connected with the input of pwm signal generation circuit (3)Described error amplifying circuit (8) comprising:-voltage overlaying circuit, the input of voltage overlaying circuit be as the first input end of error amplifying circuit (8),-error amplifier, the inverting input of error amplifier is connected with the output of described voltage overlaying circuit, the normal phase input end of error amplifier is as second input of error amplifying circuit (8), and the output of error amplifier is as the output of error amplifying circuit (8)Voltage overlaying circuit comprises NMOS pipe (MN1), the 2nd NMOS manages (MN2), the one PMOS manages (MP1), the 2nd PMOS manages (MP2) and a resistance (R3), the grid end of the one NMOS pipe (MN1) is as the input of voltage overlaying circuit, the grid termination reference voltage of the 2nd NMOS pipe (MN2), the source end short circuit and the ground connection of the one NMOS pipe (MN1) and the 2nd NMOS pipe (MN2), the drain terminal short circuit of the one NMOS pipe (MN1) and the 2nd NMOS pipe (MN2) also is connected the drain terminal that a PMOS manages (MP1), the drain terminal short circuit of the grid end of the one PMOS pipe (MP1) and PMOS pipe (MP1) self, the source terminating systems input voltage of the one PMOS pipe (MP1), form a mirror current source, the grid end short circuit of the grid end of the 2nd PMOS pipe (MP2) and PMOS pipe (MP1), the source terminating systems input voltage of the 2nd PMOS pipe (MP2), one end of the drain terminal connecting resistance (R3) of the 2nd PMOS pipe (MP2), the other end ground connection of resistance (R3), the drain terminal of the 2nd PMOS pipe (MP2) and the node that resistance (R3) joins are as the output of voltage overlaying circuit.
- According in the described power LED driving system of claim 1 to the real-time compensation apparatus of input voltage fluctuation, it is characterized in that described input voltage detection circuit (7) comprises with series system is connected in system's input voltage and systematically first resistance (R1) between the current potential and second resistance (R2), with the output of the connected node between first resistance (R1) and second resistance (R2) as input voltage detection circuit (7).
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| CN2008102351806A CN101404846B (en) | 2008-11-17 | 2008-11-17 | Real-time compensation apparatus for input voltage fluctuation in power LED driving system |
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| CN101404846B true CN101404846B (en) | 2011-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711311A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | LED (Light Emitting Diode) driving circuit and lamp |
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| CN101841226B (en) * | 2009-03-17 | 2012-09-19 | 立锜科技股份有限公司 | Power supply circuit for improving transient variation reaction, control circuit and method thereof |
| US8847497B2 (en) * | 2009-12-11 | 2014-09-30 | Koninklijke Philips N.V. | Driving modes for light circuits |
| KR101101683B1 (en) * | 2009-12-16 | 2011-12-30 | 삼성전기주식회사 | Apparatus for driving emitting device using pwm |
| KR101353254B1 (en) * | 2012-06-28 | 2014-01-17 | 삼성전기주식회사 | Circuit, apparatus and method for direct-driving led |
| TW201445858A (en) * | 2013-05-16 | 2014-12-01 | Upi Semiconductor Corp | Timing generator and timing signal generation method for power converter |
| JP6248430B2 (en) * | 2013-06-24 | 2017-12-20 | サンケン電気株式会社 | LED driving device, LED lighting device, and error amplification circuit |
| CN103531255B (en) * | 2013-09-17 | 2016-03-30 | 中国原子能科学研究院 | A kind of NUCLEAR REACTOR POWER PROTECTIVE AMPLIFYING EQUIPMENT and method |
| CN104812121B (en) * | 2014-01-27 | 2018-07-06 | 通用电气公司 | Led drive circuit |
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| CN110473509B (en) * | 2019-08-19 | 2021-11-12 | 深圳南云微电子有限公司 | Peak current type buzzer drive circuit |
| CN113890382A (en) * | 2021-09-22 | 2022-01-04 | 中建五局土木工程有限公司 | Adjustable CT transformation ratio digital controller based on secondary current sampling |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001216Y (en) * | 2007-01-24 | 2008-01-02 | 先礼群 | High power LED drive circuit |
| CN101103468A (en) * | 2005-01-13 | 2008-01-09 | 松下电器产业株式会社 | Semiconductor device for driving LED, and led driving device |
-
2008
- 2008-11-17 CN CN2008102351806A patent/CN101404846B/en not_active Withdrawn - After Issue
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101103468A (en) * | 2005-01-13 | 2008-01-09 | 松下电器产业株式会社 | Semiconductor device for driving LED, and led driving device |
| CN201001216Y (en) * | 2007-01-24 | 2008-01-02 | 先礼群 | High power LED drive circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102711311A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | LED (Light Emitting Diode) driving circuit and lamp |
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Free format text: CORRECT: ADDRESS; FROM: 210042 E8201, 2/F, BUILDING 1, NO. 699-8, XUANWU AVENUE, XUANWU DISTRICT, NANJING CITY, JIANGSU PROVINCE TO: 210042 TOWER 301, BUILDING 06, XUZHUANG INTERNATIONAL RESEARCH + DEVELOPMENT ZONE, SOFTWARE PARK, JIANGSU PROVINCE, NO. 699-22, XUANWU AVENUE, XUANWU DISTRICT, NANJING CITY, JIANGSU PROVINCE |
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Effective date of registration: 20110526 Address after: 210042, Xuanwu Road, Xuanwu District, Jiangsu Province, No. 699, -22, Jiangsu Software Park, Xu Zhuang international research and Development Zone, No. 06, building 301, Nanjing Applicant after: Nanjing Zhipu Xinlian Electronic Technology Co.,Ltd. Address before: 210042, No. 2, building 699-8, Xuanwu Avenue, Xuanwu District, Jiangsu, Nanjing, E8201 Applicant before: Nanjing Yuanzhifeng Technology Co.,Ltd. |
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Application publication date: 20090408 Assignee: Chen Chang Assignor: Nanjing Zhipu Xinlian Electronic Technology Co.,Ltd. Contract record no.: 2013320000730 Denomination of invention: Real-time compensation apparatus for input voltage fluctuation in power LED driving system Granted publication date: 20111228 License type: Common License Record date: 20131028 |
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Effective date of registration: 20151027 Address after: Xinping street Suzhou Industrial Park in Jiangsu province 210042 No. 388 Suzhou innovation park off the 23 building 3 layer 09, 10 unit Patentee after: SUZHOU ZHIPU XINLIAN ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 210042, Xuanwu Road, Xuanwu District, Jiangsu Province, No. 699, -22, Jiangsu Software Park, Xu Zhuang international research and Development Zone, No. 06, building 301, Nanjing Patentee before: Nanjing Zhipu Xinlian Electronic Technology Co.,Ltd. |
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Address after: Xinping street Suzhou Industrial Park in Jiangsu province 210042 No. 388 Suzhou innovation park off the 23 building 3 layer 09, 10 unit Patentee after: SUZHOU INTELLI CHIPLINK ELECTRONIC POLYTRON TECHNOLOGIES Inc. Address before: Xinping street Suzhou Industrial Park in Jiangsu province 210042 No. 388 Suzhou innovation park off the 23 building 3 layer 09, 10 unit Patentee before: SUZHOU ZHIPU XINLIAN ELECTRONIC TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20111228 Effective date of abandoning: 20220715 |
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Granted publication date: 20111228 Effective date of abandoning: 20220715 |