Patents by Inventor Bum-Kil LEE

Bum-Kil LEE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dimming Circuit, A Light Emitting Diode Driver Including The Same And A Light Emitting Diode Driver
    Publication number: 20120074860
    Abstract: The dimming circuit includes a reference signal generation unit, a frequency modulation unit and a duty cycle control unit. The reference signal generation unit generates a reference signal. The frequency modulation unit generates a frequency modulation signal having an initial frequency based on the reference signal and a control signal, repeatedly performs a counting operation that counts at least one pulse of the frequency modulation signal, and adjusts the frequency of the frequency modulation signal if the counting operation is completed. The duty cycle control unit generates a pulse width modulation (PWM) output signal by adjusting a duty cycle of the frequency modulation signal.
    Type: Application
    Filed: September 1, 2011
    Publication date: March 29, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Bum-Kil LEE