Kyoung-Geun Lee

Led lighting device and a method for controlling the same

Magnetic core, and inductor and transformer comprising the same

LED lighting device and method for controlling the same based on temperature changes

Saturation preventing power factor improving method and apparatus

Power factor correction method and apparatus and power supply using the same

Load driving device and load driving method

Electronic ballast circuit having voltage reducing transformer

Display apparatus and method of providing power to light source

Power supply apparatus and method

Image distortion compensating apparatus with low switching delay