Patents by Inventor Kengo Ohtaka

Kengo Ohtaka 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).

  • Method and apparatus for controlling array of light-emitting elements
    Patent number: 5457488
    Abstract: An array of light-emitting elements is switched on and off to produce a graded-intensity image on a photosensitive medium. Each light-emitting element is controlled by M-bit data representing the intensity of one image pixel, where M is a fixed integer greater than one. M strobe signals are generated for non-overlapping time intervals of different lengths, to strobe the M data bits for each light-emitting element. When strobed, each data bit switches its corresponding light-emitting element on or off. Image intensity depends on the total amount of time for which each light-emitting element is switched on.
    Type: Grant
    Filed: April 11, 1994
    Date of Patent: October 10, 1995
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Yukio Nakamura, Hiroshi Furuya, Takatoku Shimizu, Kazuo Tokura, Mio Chiba, Kengo Ohtaka, Takeyuki Yanagibashi, Takashi Ishizaki