CA2519605A1 - Discharge lamp lighting control device - Google Patents
Discharge lamp lighting control device Download PDFInfo
- Publication number
- CA2519605A1 CA2519605A1 CA002519605A CA2519605A CA2519605A1 CA 2519605 A1 CA2519605 A1 CA 2519605A1 CA 002519605 A CA002519605 A CA 002519605A CA 2519605 A CA2519605 A CA 2519605A CA 2519605 A1 CA2519605 A1 CA 2519605A1
- Authority
- CA
- Canada
- Prior art keywords
- voltage
- lighting control
- inductive
- time period
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2885—Static converters especially adapted therefor; Control thereof
- H05B41/2886—Static converters especially adapted therefor; Control thereof comprising a controllable preconditioner, e.g. a booster
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
A discharge lamp lighting control device (100) having a DC power converter, a power factor improving power converter (1), a polarity reversing circuit (2), a starter circuit (3), and a controller (4). The power factor improving power converter 1 includes a switching device S, a power factor improver, and a power converter. The power factor improver operates to smooth a rectified voltage by storing energy in a first inductive device L1 and by discharging energy from a second inductive device L2, in which the first and second inductive devices are magnetically coupled together. The storing and discharging is performed by turning ON and OFF the switching device S. A
predetermined DC voltage is converted by energy stored and discharged by a third inductive device L3 in response to the turning ON and OFF of the switching device S.
predetermined DC voltage is converted by energy stored and discharged by a third inductive device L3 in response to the turning ON and OFF of the switching device S.
Claims (27)
1. A discharge lamp lighting control device, comprising:
a DC power converter that converts an AC power source to a rectified voltage;
a power factor improving power converter (PFIPC) having a switching device, a power factor improver, and a power converter, said power factor improver smoothing said rectified voltage by storing energy in a first inductive device and by discharging energy from a second inductive device, said second inductive device being magnetically connected to said first inductive device, said storing and discharging being performed by turning ON and OFF said switching device, said power converter producing a predetermined DC voltage, said predetermined DC voltage being converted from said smoothed voltage by energy stored and discharged by a third inductive device in response to said turning ON and OFF of said switching device;
a polarity reversing circuit that converts said predetermined DC voltage into a square-wave AC voltage that is applied to a lamp;
a starter circuit that uses an output of said polarity reversing circuit as a power source to ignite the lamp by applying a high voltage pulse to the lamp; and a controller that controls said PFIPC and said polarity reversing circuit.
a DC power converter that converts an AC power source to a rectified voltage;
a power factor improving power converter (PFIPC) having a switching device, a power factor improver, and a power converter, said power factor improver smoothing said rectified voltage by storing energy in a first inductive device and by discharging energy from a second inductive device, said second inductive device being magnetically connected to said first inductive device, said storing and discharging being performed by turning ON and OFF said switching device, said power converter producing a predetermined DC voltage, said predetermined DC voltage being converted from said smoothed voltage by energy stored and discharged by a third inductive device in response to said turning ON and OFF of said switching device;
a polarity reversing circuit that converts said predetermined DC voltage into a square-wave AC voltage that is applied to a lamp;
a starter circuit that uses an output of said polarity reversing circuit as a power source to ignite the lamp by applying a high voltage pulse to the lamp; and a controller that controls said PFIPC and said polarity reversing circuit.
2. The lighting control device of claim 1, wherein said power factor improver further comprises a first capacitive device that smooths said rectified voltage converted from the AC power source, and wherein said power converter further comprises a second capacitive device that enables a stable lighting of the lamp.
3. The lighting control device of claim 2, wherein said power factor improver stores electrical energy in said first inductive device when said switching device is ON, and charges said first capacitive device via said second inductive device, with electrical energy stored in said first inductive device when said switching device is OFF.
4. The lighting control device of claim 2, wherein said power converter further comprises a third inductive device that stores electrical energy with energy stored in said first capacitive device when said switching device is ON, and charges said second capacitive device with energy stored in said third inductive device when said switching device is OFF.
5. The lighting control device of claim 1, wherein said power factor improver comprises:
said first inductive device, a first terminal of said first inductive device being electrically connected to a positive polarity side of an input power source;
a first diode having a cathode electrically connected to a remaining terminal of said first inductive device; and a circuit comprising said second inductive device having a first terminal electrically connected to an anode of said first diode, said second inductive device being magnetically coupled to said first inductive device, a second diode having a cathode electrically connected to a remaining terminal of said second inductive device, and a first capacitive device electrically connected parallel to a series circuit formed by said second inductive device and said second diode; and wherein said power converter comprises:
a third diode having an anode electrically connected to an anode of said second diode;
a second capacitive device having a first terminal electrically connected to a cathode of said third diode; and a third inductive device electrically connected between a remaining terminal of said second capacitive device and said anode of said third diode, wherein a junction of said second capacitive device and said third inductive device is electrically connected to a negative polarity side of said input power source; and wherein said switching device is provided between a junction of said first inductive device and said first diode, and said negative polarity side of said input power source.
said first inductive device, a first terminal of said first inductive device being electrically connected to a positive polarity side of an input power source;
a first diode having a cathode electrically connected to a remaining terminal of said first inductive device; and a circuit comprising said second inductive device having a first terminal electrically connected to an anode of said first diode, said second inductive device being magnetically coupled to said first inductive device, a second diode having a cathode electrically connected to a remaining terminal of said second inductive device, and a first capacitive device electrically connected parallel to a series circuit formed by said second inductive device and said second diode; and wherein said power converter comprises:
a third diode having an anode electrically connected to an anode of said second diode;
a second capacitive device having a first terminal electrically connected to a cathode of said third diode; and a third inductive device electrically connected between a remaining terminal of said second capacitive device and said anode of said third diode, wherein a junction of said second capacitive device and said third inductive device is electrically connected to a negative polarity side of said input power source; and wherein said switching device is provided between a junction of said first inductive device and said first diode, and said negative polarity side of said input power source.
6. The lighting control device of claim 5, further comprising a fourth diode having a cathode electrically connected to a junction of said first diode and said first capacitive device, an anode of said forth diode being electrically connected to the negative polarity side of said input power source.
7. The lighting control device of claim 1, wherein said switching device comprises a single switch element.
8. The lighting control device of claim 1, wherein said switching device comprises a first switch element and a second switch element, said first switch element being electrically connected to said first inductive device, said second switch element being electrically connected to said second inductive device, said first switch element and said second switch element being simultaneously turned ON and OFF by said controller.
9. The lighting control device of claim 1, wherein a turning ON and OFF of said switching device is controlled so that a first current associated with said first inductive device has a first time period in which the first current equals zero, and a second current associated with said second inductive device has a second time period in which the second current value equals zero, at least a portion of said first time period and at least a portion of said second time period overlapping.
10. The lighting control device of claim 4, wherein a turning ON and OFF of said switching device is controlled so that a first current associated with said first inductive device has a first time period in which the first current equals zero, and a second current associated with said second inductive device has a second time period in which the second current value equals zero, at least a portion of said first time period and at least a portion of said second time period overlapping, said turning ON and OFF of said switching device being controlled so that a third current associated with said third inductive device has a third time period in which the third current value equals zero.
11. The lighting control device of claim 10, wherein said switching device is switched at a fixed frequency to control a duty ratio according to an output voltage and an output current of said PFIPC.
12. The lighting control device of claim 10, wherein an ON-time of said switching device is maintained substantially constant during at least a half period of the AC power source.
13. The lighting control device of claim 10, wherein said PFIPC is controlled to output a constant voltage at a predetermined value when the lamp is not lit, and when the lamp is lit, to one of output a constant current at a certain value when an output voltage is below the predetermined value and output a constant power at a selected value when the output voltage is above the predetermined value.
14. The lighting control device of claim 13, wherein a switching frequency of said switching device is lowered so that a current associated with said first inductive device has a first time period in which a current value equals zero, and a current associated with said second inductive device has a second time period in which the current value equals zero, as the output voltage is decreased, when the output voltage is below a predetermined value in a lighting state of the lamp, at least a portion of said first time period and at least a portion of said second time period overlapping.
15. The lighting control device of claim 4, wherein a turning ON and OFF of said switching device is controlled so that a first current associated with said first inductive device has a first time period in which the first current equals zero, and a second current associated with said second inductive device has a second time period in which the second current value equals zero, at least a portion of said first time period and at least a portion of said second time period overlapping, a turning ON and OFF of said switching device being controlled so that a current associated with a third inductive device becomes a continuous current having no time period in which the current value equals zero.
16. The lighting control device of claim 15, wherein said switching device is switched at a fixed frequency to control a duty ratio of said switching device according to an output voltage and an output current of said PFIPC.
17. The lighting control device of claim 15, wherein an ON-time of said switching device is maintained substantially constant during at least a half period of the AC power source.
18. The lighting control device of claim 15, wherein said PFIPC outputs a constant voltage at a predetermined value when the lamp is not lit, and when the lamp is lit, one of outputs a constant current at a certain value when an output voltage is below the predetermined value, and outputs a constant power at a selected value when the output voltage is above the predetermined value.
19. The lighting control device of claim 18, wherein a switching frequency of said switching device is lowered so that a current associated with said first inductive device has a first time period in which the current equals zero, and a current associated with said second inductive device has a second time period in which the current equals zero, as the output voltage is decreased, when the output voltage is below the predetermined value in a lighting state of the lamp, at least a portion of said first time period and at least a portion of said second time period overlapping.
20. The lighting control device of claim 1, wherein an output of said starter circuit comprises a resonance boosting voltage.
21. The lighting control device of claim 20, wherein said resonance boosting voltage is obtained when said polarity reversing circuit applies a square-wave AC
voltage having an amplitude of an output voltage of said PFIPC to an inductor-capacitance series resonance circuit.
voltage having an amplitude of an output voltage of said PFIPC to an inductor-capacitance series resonance circuit.
22. The lighting control device of claim 20, wherein said resonance boosting voltage is obtained when said polarity reversing circuit applies a square-wave AC
voltage to an inductor-capacitance (LC) series resonance circuit, said square-wave AC
voltage having an amplitude substantially equal to twice an output voltage of said PFIPC.
voltage to an inductor-capacitance (LC) series resonance circuit, said square-wave AC
voltage having an amplitude substantially equal to twice an output voltage of said PFIPC.
23. The lighting control device of claim 21, wherein said resonance boosting voltage is obtained when a frequency of a square-wave AC voltage is approximated to a value that divides a natural resonance frequency of an inductor-capacitance (LC) series resonance circuit by a predetermined odd number.
24. The lighting control device of claim 1, wherein said PFIPC further comprises a fourth inductive device, magnetically coupled to said first inductive device and said second inductive device, that provides a voltage supply to said controller.
25. The lighting control device of claim 24, wherein a predetermined constant voltage output value of an output voltage of said PFIPC is increased only during a time period in which said voltage supply is below a predetermined value.
26. A discharge lamp lighting control device, comprising:
a power factor improving power converter that includes a switching device utilized to produce a predetermined DC voltage;
a polarity reversing circuit having a plurality of switching elements that are switched ON/OFF to control an operation of a lamp;
a starter circuit that functions to ignite the lamp; and a controller that controls said switching device of said power factor improving power converter and said plurality of switching elements of said polarity reversing circuit, wherein only said switching device of said power factor improving power converter operates at a high frequency rate when said lamp is operating in a lighting state.
a power factor improving power converter that includes a switching device utilized to produce a predetermined DC voltage;
a polarity reversing circuit having a plurality of switching elements that are switched ON/OFF to control an operation of a lamp;
a starter circuit that functions to ignite the lamp; and a controller that controls said switching device of said power factor improving power converter and said plurality of switching elements of said polarity reversing circuit, wherein only said switching device of said power factor improving power converter operates at a high frequency rate when said lamp is operating in a lighting state.
27. A power factor improving power converter of a discharge lamp lighting control device, comprising:
a switching device;
a power factor improver; and a power converter, a DC voltage being smoothed by storing energy in a first inductive device and by discharging energy from a second inductive device, said second inductive device being magnetically coupled to said first inductive device, said storing and discharging of said DC voltage being performed by adjusting an ON-time of said switching device, said power converter producing a predetermined DC output voltage that is converted from said smoothed voltage by energy stored and discharged by a third inductive device in response to said ON-time of said switching device.
a switching device;
a power factor improver; and a power converter, a DC voltage being smoothed by storing energy in a first inductive device and by discharging energy from a second inductive device, said second inductive device being magnetically coupled to said first inductive device, said storing and discharging of said DC voltage being performed by adjusting an ON-time of said switching device, said power converter producing a predetermined DC output voltage that is converted from said smoothed voltage by energy stored and discharged by a third inductive device in response to said ON-time of said switching device.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46464603P | 2003-04-23 | 2003-04-23 | |
| US60/464,646 | 2003-04-23 | ||
| PCT/US2004/010963 WO2004095668A2 (en) | 2003-04-23 | 2004-04-22 | Discharge lamp lighting control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2519605A1 true CA2519605A1 (en) | 2004-11-04 |
| CA2519605C CA2519605C (en) | 2010-03-09 |
Family
ID=33310925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002519605A Active CA2519605C (en) | 2003-04-23 | 2004-04-22 | Discharge lamp lighting control device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7391165B2 (en) |
| JP (1) | JP4253341B2 (en) |
| CN (1) | CN1778149B (en) |
| CA (1) | CA2519605C (en) |
| WO (1) | WO2004095668A2 (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004044001A1 (en) * | 2004-09-09 | 2006-04-13 | Lehmann, Erhard, Dipl.-Ing. (FH) | Method for controlling the power supply from a power source to a power consumer |
| US7288898B2 (en) * | 2005-03-04 | 2007-10-30 | International Rectifier Corporation | Automotive high intensity discharge lamp ballast circuit |
| JP2007094266A (en) * | 2005-09-30 | 2007-04-12 | Sanken Electric Co Ltd | Discharge tube lighting device for display device |
| DE102005056229B4 (en) * | 2005-11-25 | 2014-11-20 | Diehl Aerospace Gmbh | Control circuit and method for controlling a gas discharge lamp |
| TW200740300A (en) * | 2006-04-04 | 2007-10-16 | Delta Optoelectronics Inc | Driving circuit and method for fluorescent lamp |
| JP4475433B2 (en) * | 2007-02-13 | 2010-06-09 | セイコーエプソン株式会社 | Discharge lamp lighting control device and projector |
| US7589477B2 (en) * | 2007-09-25 | 2009-09-15 | Osram Sylvania Inc. | Control method and ballast for run-up of metal halide lamp |
| JP5129651B2 (en) * | 2008-05-27 | 2013-01-30 | パナソニック株式会社 | High pressure discharge lamp lighting device and lighting fixture |
| JP2011134496A (en) * | 2009-12-22 | 2011-07-07 | Panasonic Electric Works Co Ltd | High pressure discharge lamp-lighting device and lighting fixture using the same |
| US8274239B2 (en) | 2010-06-09 | 2012-09-25 | General Electric Company | Open circuit voltage clamp for electronic HID ballast |
| DE102011100005A1 (en) * | 2011-04-29 | 2012-10-31 | Tridonic Gmbh & Co. Kg | Method and circuit for power factor correction |
| US9293984B2 (en) * | 2011-08-29 | 2016-03-22 | Sharp Kabushiki Kaisha | Illumination apparatus and power supply circuit |
| US8901897B2 (en) | 2012-03-02 | 2014-12-02 | International Business Machines Corporation | Operating a DC-DC converter |
| US9281748B2 (en) | 2012-03-02 | 2016-03-08 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Operating a DC-DC converter |
| JP5974563B2 (en) * | 2012-03-15 | 2016-08-23 | 富士電機株式会社 | Step-up switching power supply |
| US9491839B2 (en) * | 2012-09-06 | 2016-11-08 | Seiko Epson Corporation | Driving device and driving method for discharge lamp, light source device, and projector |
| US9236347B2 (en) | 2013-10-09 | 2016-01-12 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Operating and manufacturing a DC-DC converter |
| CN104768270B (en) * | 2014-01-02 | 2019-04-12 | 深圳市海洋王照明工程有限公司 | Synchronous shutdown LED booster driving circuit |
| US9219422B1 (en) | 2014-08-21 | 2015-12-22 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Operating a DC-DC converter including a coupled inductor formed of a magnetic core and a conductive sheet |
| US9379619B2 (en) | 2014-10-21 | 2016-06-28 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Dividing a single phase pulse-width modulation signal into a plurality of phases |
| JP6439482B2 (en) * | 2015-02-13 | 2018-12-19 | 住友電気工業株式会社 | Converter and control circuit |
| JP6477048B2 (en) | 2015-03-09 | 2019-03-06 | セイコーエプソン株式会社 | Discharge lamp driving device, light source device, projector, and discharge lamp driving method |
| US10237521B2 (en) * | 2015-03-09 | 2019-03-19 | Seiko Epson Corporation | Discharge lamp driving device, projector, and discharge lamp driving method |
| US9618539B2 (en) | 2015-05-28 | 2017-04-11 | Lenovo Enterprise Solutions (Singapore) Pte. Ltd. | Sensing current of a DC-DC converter |
| KR101756458B1 (en) | 2017-01-06 | 2017-07-11 | 주식회사 금강에너텍 | A/d converter for led lighting device |
| CN113258755B (en) * | 2020-02-13 | 2022-07-26 | 宏碁股份有限公司 | Boost converter |
| CN112713767B (en) * | 2020-12-24 | 2022-01-04 | 南京航空航天大学 | Capacitor charge balance control method based on charge-discharge parallelism and converter |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100342457B1 (en) | 1994-02-10 | 2002-11-02 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | High frequency ac/ac converter with power factor correction |
| WO1997022232A1 (en) | 1995-12-08 | 1997-06-19 | Philips Electronics N.V. | Ballast system |
| US5932976A (en) | 1997-01-14 | 1999-08-03 | Matsushita Electric Works R&D Laboratory, Inc. | Discharge lamp driving |
| CA2206200C (en) | 1997-04-18 | 2000-06-27 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device |
| JP3772455B2 (en) | 1997-04-18 | 2006-05-10 | 松下電工株式会社 | Discharge lamp lighting device |
| CA2206276C (en) | 1997-04-18 | 2000-06-27 | Matsushita Electric Works, Ltd. | Discharge lamp lighting device |
| JP3758292B2 (en) | 1997-04-18 | 2006-03-22 | 松下電工株式会社 | Discharge lamp lighting device |
| JP3800714B2 (en) | 1997-04-18 | 2006-07-26 | 松下電工株式会社 | Discharge lamp lighting device |
| JP3758291B2 (en) | 1997-04-18 | 2006-03-22 | 松下電工株式会社 | Discharge lamp lighting device |
| US6034489A (en) | 1997-12-04 | 2000-03-07 | Matsushita Electric Works R&D Laboratory, Inc. | Electronic ballast circuit |
| BR9913860A (en) | 1998-09-18 | 2001-06-12 | Knobel Lichttech | Organization of circuit for operation of gas discharge lamps |
| DE60210768T2 (en) * | 2001-06-13 | 2007-05-10 | Matsushita Electric Works, Ltd., Kadoma | BALLAST FOR A HIGH PERFORMANCE DISCHARGE LAMP |
| US6593703B2 (en) | 2001-06-15 | 2003-07-15 | Matsushita Electric Works, Ltd. | Apparatus and method for driving a high intensity discharge lamp |
| JP4538998B2 (en) * | 2001-08-20 | 2010-09-08 | 株式会社デンソー | Discharge lamp equipment |
| US6914395B2 (en) * | 2001-11-27 | 2005-07-05 | Matsushita Electric Works, Ltd. | Electronic ballast for a high-pressure discharge lamp |
| US6670779B2 (en) * | 2001-12-05 | 2003-12-30 | Koninklijke Philips Electronics N.V. | High power factor electronic ballast with lossless switching |
| WO2003056887A1 (en) | 2001-12-25 | 2003-07-10 | Matsushita Electric Works, Ltd. | Discharge lamp operation apparatus |
-
2004
- 2004-04-22 WO PCT/US2004/010963 patent/WO2004095668A2/en active Application Filing
- 2004-04-22 CA CA002519605A patent/CA2519605C/en active Active
- 2004-04-22 JP JP2006501262A patent/JP4253341B2/en not_active Expired - Fee Related
- 2004-04-22 US US10/553,846 patent/US7391165B2/en not_active Expired - Fee Related
- 2004-04-22 CN CN2004800105648A patent/CN1778149B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US7391165B2 (en) | 2008-06-24 |
| WO2004095668A3 (en) | 2005-03-24 |
| JP2006524479A (en) | 2006-10-26 |
| US20060279230A1 (en) | 2006-12-14 |
| CN1778149B (en) | 2010-06-09 |
| CA2519605C (en) | 2010-03-09 |
| WO2004095668A2 (en) | 2004-11-04 |
| CN1778149A (en) | 2006-05-24 |
| JP4253341B2 (en) | 2009-04-08 |
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| EEER | Examination request |