File Download
Patent History
- ApplicationUS 10/796108 2004-03-10
- PublicationUS 2005110429 2005-05-26
Patent Family
Supplementary
-
Citations:
- Appears in Collections:
published patent: Dimmable ballast with resistive input and low electromagnetic interference
Title | Dimmable ballast with resistive input and low electromagnetic interference |
---|---|
Priority Date | 2004-03-10 US 10/796108 2003-11-10 US 10/518880P |
Inventors | |
Issue Date | 2005 |
Citation | US Published patent application US 2005110429. Washington, DC: US Patent and Trademark Office (USPTO), 2005 How to Cite? |
Abstract | An 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 Identifier | http://hdl.handle.net/10722/176894 |
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2012-11-30T08:38:41Z | - |
dc.date.available | 2012-11-30T08:38:41Z | - |
dc.date.issued | 2005 | - |
dc.identifier.citation | US Published patent application US 2005110429. Washington, DC: US Patent and Trademark Office (USPTO), 2005 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/176894 | - |
dc.description.abstract | An 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.isreferencedby | US 7592753 (B2) 2009-09-22 | en_HK |
dc.relation.isreferencedby | US 2007145909 (A1) 2007-06-28 | en_HK |
dc.relation.isreferencedby | US 2008164817 (A1) 2008-07-10 | en_HK |
dc.relation.isreferencedby | US 7821208 (B2) 2010-10-26 | en_HK |
dc.title | Dimmable ballast with resistive input and low electromagnetic interference | en_HK |
dc.type | Patent | en_US |
dc.description.nature | published_or_final_version | en_US |
dc.contributor.inventor | Poon Franki Ngai K | en_HK |
dc.contributor.inventor | Pong, MH | en_HK |
dc.contributor.inventor | Liu Joe C.P | en_HK |
patents.identifier.application | US 10/796108 | en_HK |
patents.description.assignee | POON FRANKI NGAI K, ; PONG MAN H, ; LIU JOE C.P, ; UNIVERSITY OF HONG KONG | en_HK |
patents.description.country | United States of America | en_HK |
patents.date.publication | 2005-05-26 | en_HK |
patents.date.application | 2004-03-10 | en_HK |
patents.date.priority | 2004-03-10 US 10/796108 | en_HK |
patents.date.priority | 2003-11-10 US 10/518880P | en_HK |
patents.description.cc | US | en_HK |
patents.identifier.publication | US 2005110429 | en_HK |
patents.relation.family | CN 1883107 (A) 2006-12-20 | en_HK |
patents.relation.family | CN 100517934 (C) 2009-07-22 | en_HK |
patents.relation.family | EP 1683256 (A1) 2006-07-26 | en_HK |
patents.relation.family | US 2005110429 (A1) 2005-05-26 | en_HK |
patents.relation.family | US 7122972 (B2) 2006-10-17 | en_HK |
patents.relation.family | WO 2005046038 (A1) 2005-05-19 | en_HK |
patents.description.kind | A1 | en_HK |
patents.type | Patent_published | en_HK |