Patents by Inventor Sung-un Yang

Sung-un Yang 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).

  • Automatic power calibration apparatus for optical recording device and automatic power calibration method therefor
    Patent number: 7420906
    Abstract: An automatic power calibration apparatus for optical recording devices and a method therefore.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: September 2, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-un Yang, Sung-ro Go
  • Method and apparatus for controlling power of laser diode in optical disc drive
    Patent number: 7304936
    Abstract: A method of and an apparatus for controlling a power of a light emitter in an optical disc drive to stabilize a servo control operation by efficiently compensating a slow tail effect occurring in a photodiode monitoring outputs of the light emitter are provided. The method includes: detecting an intensity of a laser signal reflected from a recording medium; normalizing the reference value using the detected value; and adjusting the reference value using the normalization result.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: December 4, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-un Yang, Sung-ro Go
  • Apparatus and method for controlling laser power for disc drive
    Patent number: 7248551
    Abstract: A laser power control apparatus and method prevent fluctuation in the level of laser power due to a difference between reaction speeds of an automatic power controller according to write speeds of a disc drive. In the apparatus and method, laser power can be automatically controlled to prevent a variation in the level of laser diode driving voltage in read power periods, according to the write speeds of a disc drive, in a write mode. Thus, it is possible to prevent unstable operations of a servo circuit due to a variation of the level of laser power and further, prevent deterioration in the quality of the servo circuit due to a variation in the level of a wobble signal, thereby stabilizing recording characteristics of the disc drive.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: July 24, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sung-un Yang
  • Apparatus and method for controlling recording speed of optical disc recording system
    Patent number: 7016278
    Abstract: A method of controlling a recording speed of an optical disc recording system includes detecting error information with respect to a level of a servo control signal of the optical disc recording system, and adjusting the recording speed of the optical disc recording system with reference to the error information.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: March 21, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-hong Lee, Se-tae Kim, Sung-un Yang
  • Method and apparatus for controlling power of laser diode in optical disc drive
    Publication number: 20050041562
    Abstract: A method of and an apparatus for controlling a power of a light emitter in an optical disc drive to stabilize a servo control operation by efficiently compensating a slow tail effect occurring in a photodiode monitoring outputs of the light emitter are provided. The method includes: detecting an intensity of a laser signal reflected from a recording medium; normalizing the reference value using the detected value; and adjusting the reference value using the normalization result.
    Type: Application
    Filed: June 3, 2004
    Publication date: February 24, 2005
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sung-un Yang, Sung-ro Go
  • Apparatus and method for controlling laser power for disc drive
    Publication number: 20030214893
    Abstract: A laser power control apparatus and method prevent fluctuation in the level of laser power due to a difference between reaction speeds of an automatic power controller according to write speeds of a disc drive. In the apparatus and method, laser power can be automatically controlled to prevent a variation in the level of laser diode driving voltage in read power periods, according to the write speeds of a disc drive, in a write mode. Thus, it is possible to prevent unstable operations of a servo circuit due to a variation of the level of laser power and further, prevent deterioration in the quality of the servo circuit due to a variation in the level of a wobble signal, thereby stabilizing recording characteristics of the disc drive.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Sung-Un Yang