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  Patent History
  • Application
    US 10/796108 2004-03-10
  • Publication
    US 2005110429 2005-05-26

published patent: Dimmable ballast with resistive input and low electromagnetic interference

TitleDimmable ballast with resistive input and low electromagnetic interference
Priority Date2004-03-10 US 10/796108
2003-11-10 US 10/518880P
Inventors
Issue Date2005
Citation
US Published patent application US 2005110429. Washington, DC: US Patent and Trademark Office (USPTO), 2005 How to Cite?
AbstractAn AC to AC power conversion apparatus with constant power feeding characteristics to fluorescent lamp or FD lamp is described. The constant power characteristic is achieved by discontinuous mode operation of capacitor coupled in series with the load. Packets of energy are pumped out to the load in each switching cycle, regardless of the resonant characteristics. The dependence of the input power on the square of the supply voltage make the input resistive and produces good power factor automatically. The lamp load is dimmable by external phase control dimmer like resistive incandescent lamps. Multiple lamp loads with different power rating can be integrated by adding more sets of said capacitors and associated components.
Persistent Identifierhttp://hdl.handle.net/10722/176894

 

DC FieldValueLanguage
dc.date.accessioned2012-11-30T08:38:41Z-
dc.date.available2012-11-30T08:38:41Z-
dc.date.issued2005-
dc.identifier.citationUS Published patent application US 2005110429. Washington, DC: US Patent and Trademark Office (USPTO), 2005en_HK
dc.identifier.urihttp://hdl.handle.net/10722/176894-
dc.description.abstractAn AC to AC power conversion apparatus with constant power feeding characteristics to fluorescent lamp or FD lamp is described. The constant power characteristic is achieved by discontinuous mode operation of capacitor coupled in series with the load. Packets of energy are pumped out to the load in each switching cycle, regardless of the resonant characteristics. The dependence of the input power on the square of the supply voltage make the input resistive and produces good power factor automatically. The lamp load is dimmable by external phase control dimmer like resistive incandescent lamps. Multiple lamp loads with different power rating can be integrated by adding more sets of said capacitors and associated components.en_HK
dc.relation.isreferencedbyUS 7592753 (B2) 2009-09-22en_HK
dc.relation.isreferencedbyUS 2007145909 (A1) 2007-06-28en_HK
dc.relation.isreferencedbyUS 2008164817 (A1) 2008-07-10en_HK
dc.relation.isreferencedbyUS 7821208 (B2) 2010-10-26en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License For Public Patent Documentsen_US
dc.titleDimmable ballast with resistive input and low electromagnetic interferenceen_HK
dc.typePatenten_US
dc.description.naturepublished_or_final_versionen_US
dc.contributor.inventorPoon Franki Ngai Ken_HK
dc.contributor.inventorPong, MHen_HK
dc.contributor.inventorLiu Joe C.Pen_HK
patents.identifier.applicationUS 10/796108en_HK
patents.description.assigneePOON FRANKI NGAI K, ; PONG MAN H, ; LIU JOE C.P, ; UNIVERSITY OF HONG KONGen_HK
patents.description.countryUnited States of Americaen_HK
patents.date.publication2005-05-26en_HK
patents.date.application2004-03-10en_HK
patents.date.priority2004-03-10 US 10/796108en_HK
patents.date.priority2003-11-10 US 10/518880Pen_HK
patents.description.ccUSen_HK
patents.identifier.publicationUS 2005110429en_HK
patents.relation.familyCN 1883107 (A) 2006-12-20en_HK
patents.relation.familyCN 100517934 (C) 2009-07-22en_HK
patents.relation.familyEP 1683256 (A1) 2006-07-26en_HK
patents.relation.familyUS 2005110429 (A1) 2005-05-26en_HK
patents.relation.familyUS 7122972 (B2) 2006-10-17en_HK
patents.relation.familyWO 2005046038 (A1) 2005-05-19en_HK
patents.description.kindA1en_HK
patents.typePatent_publisheden_HK

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