Patents by Inventor Sung Dae Kim

Sung Dae Kim 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: 20120087696
    Abstract: An image forming apparatus is configured to reduce a velocity fluctuation of a rotating body by reducing the AC velocity component of the rotating body. The image forming apparatus may include an image bearing body with a surface on which a toner image is formed; a driving motor configured to drive the image bearing body according to an input signal; and a controller configured to control the driving motor to output a motor output velocity at a period equal to that of an AC velocity component of the image bearing body. A velocity control method for the rotating body includes sampling a continuous motor input signal at a period equal to that of an AC velocity component of a rotating velocity of the rotating body. The sampled signal is transmitted to a driving motor that drives the rotating body, which is driven based upon the discrete motor input signal.
    Type: Application
    Filed: September 23, 2011
    Publication date: April 12, 2012
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hyun-Ki Cho, Sung-Dae Kim, Jong-Tae Kim, Dong-Hoon Han
  • Patent number: 8072853
    Abstract: A method and device for managing a recording medium including a non data area having a final defect management area and a data area having a user data area and a spare area. The method includes: (a) recording a defect list onto one or more recording-units of a temporary defect management area allocated to one of the non data area and the spare area, and recording position information of the defect list onto the temporary defect management area, the position information containing one or more defect list pointers which indicate position of the one or more recording-units containing the defect list; and (b) if a recoding-unit is defective, re-recording defect list data onto another recording-unit, and recording updated position information containing a defect list pointer indicating a position of the another recording-unit instead of a defect list pointer indicating a position of the defective recording-unit.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: December 6, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 8045430
    Abstract: A recording medium of writable once type, and a method and apparatus for managing a defective area on the recording medium are provided. The method includes detecting an existence of a defective area within a data area of the recording medium once data are written onto the data area in a data writing operation; writing data written in the defective area onto a spare area of the data area if the defective area is detected; writing temporary management information pertaining to the defective area, onto a temporary management area on the recording medium; and writing access information for accessing the temporary management information, onto a reserved area on the recording medium.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: October 25, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7992057
    Abstract: A recording medium and a method and apparatus for managing a defective area on the recording medium are provided. The method includes detecting an existence of a defective area within the data area of the recording medium; replacing the defective area with a replacement area in the spare area if the defective area is detected; writing in the spare area defect management information which cumulatively includes defect list information associated with the defective area detected in the step (a) and any defect list information previously written in the recording medium; and writing onto the recording medium positional information of the defect management information.
    Type: Grant
    Filed: January 12, 2009
    Date of Patent: August 2, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7979008
    Abstract: A toner supplying device which is capable of individually supplying toners of different colors. The toner supplying device can include a driving source; a plurality of toner receptacles in which different color toners are contained and respective toner discharging members are provided in order to discharge toners while being driven by power transmitted from the driving source; and a plurality of spring clutches to selectively transmit power from the driving source to the toner discharging members. The toner supplying device according to the present general inventive concept can be advantageously employed in toner-refill type color image forming apparatuses in view of the miniaturization of the apparatus and reduction in the manufacturing costs.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: July 12, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-dae Kim, Young-min Yoon
  • Publication number: 20110150516
    Abstract: A color image forming apparatus includes a plurality of mark sensing devices are arranged between a plurality of photoconductors arranged on an intermediate transfer belt to sense a mark transferred to a region of the intermediate transfer belt corresponding to an interval between successive recording media. As an exposure time to form an electrostatic latent image on a photoconductor, on which a following developer image will be formed, is determined, minimized mis-registration and consequently, improved color registration correction efficiency are accomplished. Also, automatic color registration correction is performed on per printing operation basis, resulting in improvement in image quality.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 23, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Dae KIM, Hyun Ki Cho, Bong Hwan Choi
  • Patent number: 7944783
    Abstract: Disclosed is a write-once optical disc and method for managing a spare area thereof, the write-once optical disc possibly having a temporary defect management area within one or more spare areas. The method includes the steps of: allocating one or more spare areas including the temporary defect management area at an initial status of the optical disc; and during use of the optical disc, expanding the spare area allocated including the temporary defect management area to set a new spare area. By employing the above optical disc and method, it becomes possible to establish unified regulations on the structures of the spare area and temporary defect management area applicable to the write-once optical disc, so that usage efficiency of the optical disc can be improved.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 17, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7936649
    Abstract: A device and method of reproducing and/or recording data onto a write once recording medium, the recording medium having a data area and a management area, the data area having a spare area. The recording method include: performing a replacement-recording by recording data requested to be recorded in a specified area onto a replacement area in the data area when the specified area is defective or contains data recorded thereon; and recording onto the management area a pair of consecutive entries for managing the replacement-recording when a size of the specified area corresponds to a plurality of consecutive recording-units. One of the pair of consecutive entries includes start address information of the specified area and start address information of the replacement area and another of the pair of consecutive entries includes end address information of the specified area and end address information of the replacement area.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: May 3, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Publication number: 20110097119
    Abstract: To restrict a period velocity change of a photoconductor that is an immediate cause of a color registration error, a gap change of a color registration error detection pattern caused by a linear velocity change of the photoconductor is acquired and a linear velocity change of the photoconductor is reduced based on a relationship between the gap change and a velocity of a motor, whereby a reduced color registration error is accomplished.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 28, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun Ki Cho, Sung Dae Kim, Bong-Hwan Choi, Seok Heon Chae, Sung Hoon Lim
  • Patent number: 7929391
    Abstract: A write-once optical recording medium, a method for allocating a defect management area of the write-once optical recording medium, and a method for allocating a spare area of the write-once optical recording medium are provided. A method of managing defects on a write-once optical recording medium having at least one recording layer includes the steps of allocating at least one temporary defect management area having a fixed size and at least one temporary defect management area having a variable size to said optical recording medium, respectively, recording defect management information on the at least one temporary defect management area having a fixed size and the at least one temporary defect management area having a variable size; and using the at least one temporary defect management area having a fixed size and the at least one temporary defect management area having a variable size is provided herein.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: April 19, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7911904
    Abstract: A recording medium, and a method and apparatus for recording and/or reproducing management information on/from the recording medium are discussed. According to an embodiment, the invention provides an apparatus includes components so that the apparatus finalizes the recording medium when receiving request of an external host or when a temporary defect management area located in at least one of a non-data area and a non-user data area becomes full, where a controller is configured to control the components so that the apparatus records the latest defect list information written in the temporary defect management area onto a final defect management area when finalizing the recording medium.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: March 22, 2011
    Assignee: LG Electronics, Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7849372
    Abstract: A method, apparatus and recording medium for managing defects are discussed. According to an embodiment, the method includes allocating at least one spare area to the recording medium, and at least one temporary defect management area to the spare area when a plurality of temporary defect management areas are to be separately provided; recording defect management information on a first temporary defect management area; and recording defect management information on a second temporary defect management area after the first temporary defect management area is full, the second temporary defect management area being allocated to the spare area.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: December 7, 2010
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7826320
    Abstract: A method and apparatus for recording or reproducing data are discussed. According to an embodiment, the invention is directed to a method for recording data onto a recording medium having a recording layer, the recording layer including an inner area, a data area and an outer area, the data area having a user data area and a spare area, the user data area consisting of a plurality of clusters, the method comprising steps of: (a) recording a first data block having a temporary defect list for managing a defective area of the data area onto a temporary defect management area allocated in the inner area or the spare area; and (b) recording a second data block having a space bitmap onto the temporary defect management area.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: November 2, 2010
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7813243
    Abstract: An optical disc of write once type, a method and an apparatus of managing defect information on the optical disc of write once type, e.g., a BD-WO, are provided with a temporary defect management area (TDMA). The method includes preparing the temporary defect management area (TDMA) in which a temporary defect list (TDFL) is recorded as defect management information for managing a defective area on the optical disc, recording the most recent temporary defect list cumulatively with the previous temporary defect list in the temporary defect management area, and recording position information for indicating a position of the most recent temporary defect list in the temporary defect management area along with the temporary defect list to more effectively manage the temporary defect list.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: October 12, 2010
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7764581
    Abstract: A write-once type optical disc and a method and apparatus for allocating a spare area on the write-once type optical disc are provided. The method includes allocating a data area on a recording medium of write-once type, and allocating a user data area and at least one spare area within the data area on the recording medium, the at least one spare area having a variable size, wherein a maximum recording capacity of the at least one spare area on the recording medium is less than a maximum recording capacity of at least one variable spare area on a rewritable type optical disc.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: July 27, 2010
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Patent number: 7721859
    Abstract: A rotary force controlling apparatus and an image forming apparatus including the same are provided. The rotary force controlling apparatus includes a clutch device having a shaft, and a rotary body mounted at one end of the shaft. A housing receives and rotates together with the shaft. A power transferring member is rotatably mounted in the housing and selectively rotates the housing by a clutch inserted between the housing and the power transferring member. A positioning unit protrudes from the periphery of the housing and positions a stop location of the rotary body. A solenoid unit is spaced apart from the clutch device and is selectively turned on and off. The positioning unit includes a first positioning unit that positions an initial location of the rotary body when the solenoid unit is turned on; and a plurality of second positioning units that are separated from the first positioning unit and stop the rotary body at a predetermined location when the solenoid unit is turned off.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: May 25, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-dae Kim, Young-min Yoon, Cheol-young Han
  • Publication number: 20100104321
    Abstract: An image forming apparatus is configured to reduce a velocity fluctuation of a rotating body by reducing the AC velocity component of the rotating body. The image forming apparatus may include an image bearing body with a surface on which a toner image is formed; a driving motor configured to drive the image bearing body according to an input signal; and a controller configured to control the driving motor to output a motor output velocity at a period equal to that of an AC velocity component of the image bearing body. A velocity control method for the rotating body includes sampling a continuous motor input signal at a period equal to that of an AC velocity component of a rotating velocity of the rotating body. The sampled signal is transmitted to a driving motor that drives the rotating body, which is driven based upon the discrete motor input signal.
    Type: Application
    Filed: October 7, 2009
    Publication date: April 29, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Ki Cho, Sung-Dae Kim, Jong-Tae Kim, Dong-Hoon Han
  • Patent number: 7701823
    Abstract: A recording medium, and a method and apparatus for recording management information on the recording medium are discussed. According to an embodiment, the invention provides a method of recording management information on a recording medium, the recording medium including a temporary defect management area (TDMA) and a final defect management area (DMA), the DMA including a defect list area, the method comprising: recording, in the TDMA, defect list information produced while the recording medium is in use, and recording, in the defect list area of the DMA, the latest defect list information included in the TDMA when the recording medium is to be finalized, wherein the defect list area of the DMA includes a plurality of recording units, and the latest defect list information is recorded on at least one of the recording units of the defect list area.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: April 20, 2010
    Assignee: LG Electronics Inc.
    Inventors: Yong Cheol Park, Sung Dae Kim
  • Publication number: 20100091622
    Abstract: A method and device for managing a recording medium including a non data area having a final defect management area and a data area having a user data area and a spare area. The method includes: (a) recording a defect list onto one or more recording-units of a temporary defect management area allocated to one of the non data area and the spare area, and recording position information of the defect list onto the temporary defect management area, the position information containing one or more defect list pointers which indicate position of the one or more recording-units containing the defect list; and (b) if a recoding-unit is defective, re-recording defect list data onto another recording-unit, and recording updated position information containing a defect list pointer indicating a position of the another recording-unit instead of a defect list pointer indicating a position of the defective recording-unit.
    Type: Application
    Filed: December 16, 2009
    Publication date: April 15, 2010
    Inventors: Yong Cheol PARK, Sung Dae Kim
  • Patent number: 7697862
    Abstract: A high voltage switch device includes a plurality of switches installed between a high voltage power unit and a plurality of developing units. A plurality of cams are disposed on a cam shaft corresponding to the respective switches. The switches are selectively turned “on” and “off” as the cam shaft rotates.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: April 13, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-dae Kim, Cheol-young Han, Young-min Yoon