Patents by Inventor Oh Jaekwan

Oh Jaekwan 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).

  • Patent number: 8514667
    Abstract: An electronic timepiece can easily acquire a leap second information reception time with minimal processor load. A first table groups leap second information reception times expressed by hour, minute, second, and day values into plural minute-second patterns of minute-second combinations that are common to plural hours, and relates numbers identifying these minute-second patterns to the day and hour values. The minute-second combinations are grouped by number in a second table. The number corresponding to the day and hour of the internal time is found from the first table (S1). A minute-second combination that is later than the internal time is found from the minute-second combinations corresponding to the acquired number (S2). And leap second reception time is calculated. If the resulting leap second reception time matches the internal time is determined (S9). If the times match, the leap second information is received (S10, S11).
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: August 20, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Toshikazu Akiyama, Oh Jaekwan
  • Patent number: 8407450
    Abstract: An electronic device receives satellite signals from positioning information satellites and acquires positioning information and time information. A stored data table comprises a first block of data having a first array of time difference data and a second block of data having a second array of time difference data that is different than the first array of time difference data. A stored memory address table stores the memory address of each of the first and second blocks of data, at least one the blocks of data being stored a plurality of times in the memory address table. The data block corresponding to the acquired positioning information is identified, the memory address corresponding to that data block is read, the data block data indicated by the memory address is acquired, and the time difference data for the segment corresponding to the positioning information is acquired from the data block.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: March 26, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Oh Jaekwan
  • Publication number: 20120201101
    Abstract: An electronic timepiece can easily acquire a leap second information reception time with minimal processor load. A first table groups leap second information reception times expressed by hour, minute, second, and day values into plural minute-second patterns of minute-second combinations that are common to plural hours, and relates numbers identifying these minute-second patterns to the day and hour values. The minute-second combinations are grouped by number in a second table. The number corresponding to the day and hour of the internal time is found from the first table (S1). A minute-second combination that is later than the internal time is found from the minute-second combinations corresponding to the acquired number (S2). And leap second reception time is calculated. If the resulting leap second reception time matches the internal time is determined (S9). If the times match, the leap second information is received (S10, S11).
    Type: Application
    Filed: February 6, 2012
    Publication date: August 9, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Toshikazu Akiyama, Oh Jaekwan
  • Publication number: 20100228948
    Abstract: An electronic device has a reception unit that can receive satellite signals transmitted from positioning information satellites and acquire positioning information and time information, a time difference data storage means in which a data table and a memory address table are stored, and a time difference data acquisition means that acquires time difference data corresponding to positioning information acquired by the reception unit from the time difference data storage means. The data table is compiled by dividing geographical information to which time difference data is assigned into segments of a constant size, setting only one time difference in each segment, grouping the segments into blocks each containing a specific number of segments, and storing the time difference data of each segment as block data by block unit while storing the block data only once for blocks containing the same time difference data array and storing the block data for mutually different time difference data arrays once each.
    Type: Application
    Filed: March 3, 2010
    Publication date: September 9, 2010
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Oh Jaekwan
  • Patent number: 7701621
    Abstract: An image correction system includes an image capturer, operable to capture an object image and to generate image data based on the object image, a first storage, adapted to store the image data, a timing signal generator, operable to periodically generate timing signals, an image processor, operable to periodically store the image data into the first storage in accordance with each of the timing signals, a detector, operable to periodically detect movement of the image capturer and to generate movement data based on the detected movement, and a second storage, adapted to periodically store the movement data in association with timing data based on each of the timing signals.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: April 20, 2010
    Assignee: Seiko Epson Corporation
    Inventors: Shigenori Kanno, Kazuo Nomura, Oh Jaekwan
  • Publication number: 20060238828
    Abstract: An image correction system includes an image capturer, operable to capture an object image and to generate image data based on the object image, a first storage, adapted to store the image data, a timing signal generator, operable to periodically generate timing signals, an image processor, operable to periodically store the image data into the first storage in accordance with each of the timing signals, a detector, operable to periodically detect movement of the image capturer and to generate movement data based on the detected movement, and a second storage, adapted to periodically store the movement data in association with timing data based on each of the timing signals.
    Type: Application
    Filed: March 9, 2006
    Publication date: October 26, 2006
    Inventors: Shigenori Kanno, Kazuo Nomura, Oh Jaekwan