Patents by Inventor Akira Hichijou

Akira Hichijou 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 compensation of LED-array output power variation in electrophotographic printing
    Patent number: 4727428
    Abstract: In a method and an apparatus for compensation of any variation that occurs in the output power or luminous energy of a LED array used in electrophotographic printing, the time for applying a current to one line of the LED array is optimally divided into a fundamental on-time for constant current application to the individual elements of the LED array and a compensational on-time for selective current application thereto in such a manner that the exposure values on a photosensitive medium become uniform.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: February 23, 1988
    Assignee: Matsushita Graphic Communication Systems, Inc.
    Inventors: Kiyoshi Futatsugi, Inui Yasuo, Mitsuo Mochizuki, Akira Hichijou