Inventor · disambiguated record
Nak-Choon Choi
Also filed as: CHOI NAK-CHOON
18 granted patents·924 citations·filing 1993–2006
96Inventor score
Files withSAMSUNG ELECTRONICS CO LTD13FAIRCHILD KR SEMICONDUCTOR LTD3FAIRFIELD KOREA SEMICONDUCTOR1KEC KK1
Top patents by PatentIndex Score
18 records- 0193US5764039APower factor correction circuit having indirect input voltage sensingSAMSUNG ELECTRONICS CO LTD·Filed 1996·Granted Jun 9, 1998·137 cites·20 claims
- 0292US5546300AZero voltage switching controller of resonance mode converter and electronic ballast using the sameSAMSUNG ELECTRONICS CO LTD·Filed 1994·Granted Aug 13, 1996·104 cites·10 claims
- 0389US5642065AZero-voltage switching circuitry, as for use in resonant invertersSAMSUNG ELECTRONICS CO LTD·Filed 1995·Granted Jun 24, 1997·74 cites·19 claims
- 0489US5612609AContinuous conduction mode switching power supply with improved power factor correctionSAMSUNG ELECTRONICS CO LTD·Filed 1993·Granted Mar 18, 1997·98 cites·1 claims
- 0588US5949229APower factor correction circuit having an error signal multiplied by a current signalSAMSUNG ELECTRONICS CO LTD·Filed 1997·Granted Sep 7, 1999·97 cites·16 claims
- 0686US6178104B1Power factor correction circuit using reverse sawtooth wavesSAMSUNG ELECTRONICS CO LTD·Filed 1999·Granted Jan 23, 2001·85 cites·18 claims
- 0784US5500792AZero-voltage switching type electronic ballast for fluorescent lampSAMSUNG ELECTRONICS CO LTD·Filed 1994·Granted Mar 19, 1996·99 cites·13 claims
- 0878US6262542B1Electronic ballast systemFAIRCHILD KR SEMICONDUCTOR LTD·Filed 2000·Granted Jul 17, 2001·25 cites·17 claims
- 0978US6175218B1Power factor correction (PFC) controllerFAIRCHILD KR SEMICONDUCTOR LTD·Filed 1999·Granted Jan 16, 2001·62 cites·2 claims
- 1077US6316882B1Electronic ballast having a stable reference voltage and a multifunction input for soft dimming and ON/OFF controlFAIRFIELD KOREA SEMICONDUCTOR·Filed 2000·Granted Nov 13, 2001·22 cites·20 claims
- 1173US5699238AZero voltage switching controller of resonance mode converter and electronic ballast using the sameSAMSUNG ELECTRONICS CO LTD·Filed 1996·Granted Dec 16, 1997·33 cites·5 claims
- 1269US7426124B2DC-AC converterKEC KK·Filed 2006·Granted Sep 16, 2008·5 cites·13 claims
- 1363US6215255B1Electric ballast systemFAIRCHILD KR SEMICONDUCTOR LTD·Filed 2000·Granted Apr 10, 2001·11 cites·10 claims
- 1462US5770926AFeedback control system of an electronic ballast which detects arcing of a lampSAMSUNG ELECTRONICS CO LTD·Filed 1996·Granted Jun 23, 1998·37 cites·12 claims
- 1546US6084451APulse width modulation controller operational in both current and voltage modeSAMSUNG ELECTRONICS CO LTD·Filed 1998·Granted Jul 4, 2000·9 cites·15 claims
- 1645US5648702ADimming control circuit having feedback frequency controlSAMSUNG ELECTRONICS CO LTD·Filed 1995·Granted Jul 15, 1997·11 cites·5 claims
- 1740US5705896AControl electronic ballast system using feedbackSAMSUNG ELECTRONICS CO LTD·Filed 1996·Granted Jan 6, 1998·8 cites·5 claims
- 1839US5973458ASequential feedback control system for an electronic ballastSAMSUNG ELECTRONICS CO LTD·Filed 1996·Granted Oct 26, 1999·7 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →