Inventor · disambiguated record
Kwang-Hwa Liu
Also filed as: LIU KWANG H · LIU KWANG-HWA
26 granted patents·6 pending applications·2,430 citations·filing 1986–2017
98Inventor score
Files withLIU KWANG-HWA7GREEN MARK TECHNOLOGY INC4ARQUES TECHNOLOGY INC3AMAZION ELECTRONICS INC2ARQUES TECHNOLOGY2
Top patents by PatentIndex Score
32 records- 0198US4720667AZero-current switching quasi-resonant converters operating in a full-wave modeLEE FRED C·Filed 1986·Granted Jan 19, 1988·330 cites·12 claims
- 0298US4720668AZero-voltage switching quasi-resonant convertersLEE FRED C·Filed 1986·Granted Jan 19, 1988·337 cites·41 claims
- 0397US7295452B1Active power factor correction circuit and control method thereofGREEN MARK TECHNOLOGY INC·Filed 2006·Granted Nov 13, 2007·117 cites·18 claims
- 0497US7259531B1Speed control of brushless DC motorsLIU KWANG-HWA·Filed 2006·Granted Aug 21, 2007·63 cites·23 claims
- 0597US6798177B1Boost-buck cascade converter for pulsating loadsARQUES TECHNOLOGY INC·Filed 2002·Granted Sep 28, 2004·240 cites·18 claims
- 0697US5619402AHigher-efficiency cold-cathode fluorescent lamp power supplyO2MICRO INC·Filed 1996·Granted Apr 8, 1997·234 cites·20 claims
- 0796US4785387AResonant converters with secondary-side resonanceVIRGINIA TECH INTELL PROP·Filed 1986·Granted Nov 15, 1988·132 cites·14 claims
- 0895US7750616B2Buck converter LED driver circuitGREEN MARK TECHNOLOGY INC·Filed 2007·Granted Jul 6, 2010·53 cites·5 claims
- 0994US8294379B2Dimmable LED lamp and dimmable LED lighting apparatusLIU KWANG-HWA·Filed 2009·Granted Oct 23, 2012·86 cites·15 claims
- 1094US7443119B2Circuit and method for controlling the rotating speed of a BLDC motorGREEN MARK TECHNOLOGY INC·Filed 2007·Granted Oct 28, 2008·38 cites·14 claims
- 1194US6495995B2Self-clocking multiphase power supply controllerSEMTECH CORP·Filed 2001·Granted Dec 17, 2002·114 cites·65 claims
- 1293US8247992B2LED driver circuitLIU KWANG-HWA·Filed 2010·Granted Aug 21, 2012·15 cites·10 claims
- 1392US7332962B2Filterless class D power amplifierAMAZION ELECTRONICS INC·Filed 2005·Granted Feb 19, 2008·47 cites·20 claims
- 1492US5903764ASmart battery selector offering power conversion internally within a portable deviceO2MICRO INT LTD·Filed 1997·Granted May 11, 1999·196 cites·16 claims
- 1591US5892336ACircuit for energizing cold-cathode fluorescent lampsO2MICRO INT LTD·Filed 1998·Granted Apr 6, 1999·102 cites·6 claims
- 1684US6903535B2Biasing system and method for low voltage DC—DC converters with built-in N-FETsARQUES TECHNOLOGY INC·Filed 2003·Granted Jun 7, 2005·50 cites·13 claims
- 1784US6861824B1Charger system with dual-level current regulation and dual-level thermal regulationARQUESTTECHNOLOGY INC·Filed 2002·Granted Mar 1, 2005·77 cites·15 claims
- 1884US6707280B1Bidirectional voltage regulator sourcing and sinking current for line terminationARQUES TECHNOLOGY INC·Filed 2002·Granted Mar 16, 2004·34 cites·11 claims
- 1983USD425233SDecorative fluorescent lamp and lamp fixtureLIU KWANG H·Filed 1999·Granted May 16, 2000·30 cites·1 claims
- 2083US5999421ADual-channel power system with an eight-pin PWM control chipFiled 1999·Granted Dec 7, 1999·70 cites·10 claims
- 2179US9093894B2Multiple-level power control systemGREENMARK TECHNOLOGY INC·Filed 2012·Granted Jul 28, 2015·5 cites·17 claims
- 2277US7427893B2Circuit and method for controlling the power mode a class-D amplifierLIU KWANG-HWA·Filed 2006·Granted Sep 23, 2008·10 cites·16 claims
- 2375US9220140B2LED lighting driverGREENMARK TECHNOLOGY INC·Filed 2012·Granted Dec 22, 2015·4 cites·13 claims
- 2473US7106566B2Power adapter interface circuitry for protecting a battery operated systemARQUES TECHNOLOGY·Filed 2003·Granted Sep 12, 2006·21 cites·36 claims
- 2573US7057310B2Dual-output voltage regulatorARQUES TECHNOLOGY·Filed 2003·Granted Jun 6, 2006·23 cites·33 claims
- 2658US9190909B2Control device for multiphase interleaved DC-DC converter and control method thereofUNIV NAT TAIWAN·Filed 2013·Granted Nov 17, 2015·2 cites·9 claims
- 2748US2009257250A1Synchronous rectifier dc/dc converters using a controlled-coupling sense windingGREEN MARK TECHNOLOGY INC·Filed 2008·Application pending·0 cites
- 2842US2007223907A1Photo-flash driving circuitLIU KWANG-HWA·Filed 2006·Application pending·0 cites
- 2937US2019058343A1Charger system and power adapter thereofGEMI SEMICONDUCTOR INC·Filed 2017·Application pending·0 cites
- 3037US2007262760A1Multiple-output dc-dc converterLIU KWANG-HWA·Filed 2006·Application pending·0 cites
- 3136US2007063681A1Direct mode pulse width modulation for DC to DC convertersAMAZION ELECTRONICS INC·Filed 2005·Application pending·0 cites
- 3235US2008008337A1Usb hub with a usb powered speakerLIU KWANG-HWA·Filed 2006·Application pending·0 cites
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