Inventor

CHOI NAK-CHOON

KR18 patents

⚠️ This page may combine multiple inventors who share the name “CHOI NAK-CHOON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHOI NAK-CHOON

SAMSUNG ELECTRONICS CO LTD

Power factor correction circuit using reverse sawtooth waves

Continuous conduction mode switching power supply with improved power factor correction

Power factor correction circuit having an error signal multiplied by a current signal

Power factor correction circuit having indirect input voltage sensing

Zero voltage switching controller of resonance mode converter and electronic ballast using the same

Zero-voltage switching circuitry, as for use in resonant inverters

Zero voltage switching controller of resonance mode converter and electronic ballast using the same

Zero-voltage switching type electronic ballast for fluorescent lamp

Feedback control system of an electronic ballast which detects arcing of a lamp

Control electronic ballast system using feedback

Pulse width modulation controller operational in both current and voltage mode

Sequential feedback control system for an electronic ballast

Dimming control circuit having feedback frequency control

FAIRCHILD KR SEMICONDUCTOR LTD

Power factor correction (PFC) controller

Electronic ballast system

Electric ballast system

FAIRFIELD KOREA SEMICONDUCTOR

Electronic ballast having a stable reference voltage and a multifunction input for soft dimming and ON/OFF control

KEC KK

DC-AC converter