Patents by Inventor Byoung Woo Ryu

Byoung Woo Ryu 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).

  • Publication number: 20120069603
    Abstract: An adapter power supply includes an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary terminal in order to output an output power by converting a link voltage of the DC power; and a controller presuming a load current of the output power through a primary current of the transformer and varying the link voltage of the DC power according to variation of the estimated load current.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 22, 2012
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Byoung Woo RYU, Gun Woo MOON, Seong Wook CHOI, Jong Sun KIM, Dong Seong OH
  • Patent number: 8054653
    Abstract: A direct current (DC) power supply for varying an output voltage according to a load current variation is disclosed. The DC power supply includes an alternating current (AC)/DC conversion unit converting commercial AC power into DC power, a DC/DC conversion unit converting a voltage level of the DC power and outputting output power, and a control unit controlling conversion of the voltage level of the fed-back DC power according to a variation in a load current of the output power from the DC/DC conversion unit.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: November 8, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Chong Eun Kim, Dong Seong Oh, Jeong Man Han
  • Patent number: 8027174
    Abstract: An advantage of the present invention is to provide an adapter power supply which varies a link voltage of DC power serving an input power of a DC/DC converter according to variation of a load current estimated by measuring a secondary current using a lossless current measurement technique at a primary terminal of a transformer of the DC/DC converter and thus presuming a load current of an output power. An adapter power supply according to present invention may include an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary terminal in order to output an output power by converting a link voltage of the DC power; and a controller presuming a load current of the output power through a primary current of the transformer and varying the link voltage of the DC power according to variation of the estimated load current.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: September 27, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Gun Woo Moon, Seong Wook Choi, Jong Sun Kim, Dong Seong Oh
  • Publication number: 20100302812
    Abstract: The present invention relates to an adapter power supply, which includes a switching unit for switching a DC voltage; a transformer which has a primary winding connected to the switching unit, a secondary winding electromagnetically coupled to the primary winding, and an auxiliary winding electromagnetically coupled to the primary winding; a rectifier for rectifying a voltage outputted from the transformer; and a controller for controlling the switching unit to operate according to the PWM scheme in a normal operation mode, and to operate according to a quasi-resonant scheme in a standby mode, by detecting information of a load connected to the rectifier.
    Type: Application
    Filed: September 30, 2009
    Publication date: December 2, 2010
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Gun Woo MOON, Byoung Woo Ryu, Seong Wook Choi, Bong Chul Kim, Dong Seong Oh
  • Publication number: 20100156509
    Abstract: In accordance with one aspect of the present invention to achieve the object, there is provided a switching mode power supply for reducing standby power including an EMI(Electro-Magnetic Interference) filter unit for removing a high frequency noise component by being connected to an input power source; a PFC(Power Factor Correction) unit connected to the EMI filter unit; a DC/DC unit connected to the PFC unit; a synchronous rectifier unit connected to the DC/DC unit; a PFC controller connected to the PFC unit and provided with an overvoltage protection stage; a DC/DC controller which is connected to the DC/DC unit and generates a burst mode operation signal; a synchronous rectifier controller for controlling the synchronous rectifier unit by being connected to the synchronous rectifier unit; an error signal generation unit for sensing an output voltage to generate an error signal and then transmitting the error signal to the DC/DC controller; a control unit for synchronizing the DC/DC unit and the PFC unit so
    Type: Application
    Filed: February 13, 2009
    Publication date: June 24, 2010
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Gun Woo Moon, Seong Wook Choi, Byoung Hee Lee, Dong Seong Oh
  • Publication number: 20100020578
    Abstract: An advantage of the present invention is to provide an adapter power supply which varies a link voltage of DC power serving an input power of a DC/DC converter according to variation of a load current estimated by measuring a secondary current using a lossless current measurement technique at a primary terminal of a transformer of the DC/DC converter and thus presuming a load current of an output power. An adapter power supply according to present invention may include an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary terminal in order to output an output power by converting a link voltage of the DC power; and a controller presuming a load current of the output power through a primary current of the transformer and varying the link voltage of the DC power according to variation of the estimated load current.
    Type: Application
    Filed: October 7, 2008
    Publication date: January 28, 2010
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Gun Woo Moon, Seong Wook Choi, Jong Sun Kim, Dong Seong Oh
  • Publication number: 20090147553
    Abstract: A direct current (DC) power supply for varying an output voltage according to a load current variation is disclosed. The DC power supply includes an alternating current(AC)/DC conversion unit converting commercial AC power into DC power, a DC/DC conversion unit converting a voltage level of the DC power and outputting output power, and a control unit controlling conversion of the voltage level of the fed-back DC power according to a variation in a load current of the output power from the DC/DC conversion unit.
    Type: Application
    Filed: August 28, 2008
    Publication date: June 11, 2009
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Chong Eun Kim, Dong Seong Oh, Jeong Man Han