Patents by Inventor Kenichirou Nagashita

Kenichirou Nagashita 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).

  • Fingerprint detection apparatus
    Patent number: 8131025
    Abstract: A fingerprint detection apparatus for obtaining an image of a fingerprint of a finger by using a light source for emitting a light to the finger and an image obtaining part for outputting electric signals in correspondence with received light is disclosed. The fingerprint detection apparatus includes a system controller for determining whether the finger is in contact with or in the vicinity of the image obtaining part by comparing a threshold with a difference between a value of the electric signal when the light source is lit and a value of the electric signal when the light source is not lit.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: March 6, 2012
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Yoichi Iseri, Yoshinori Tahara, Kenichirou Nagashita
  • Image reading device, image reading method, and fingerprint reading device
    Publication number: 20080205713
    Abstract: An image reading device is disclosed. The image reading device includes an image reading unit which reads an image of an object to be read, and an image reading control unit which adjusts a reading period of the image by the image reading unit to one of predetermined values based on intensity of light input to the image reading unit after setting the reading period of the image by the image reading unit to be a minimum value.
    Type: Application
    Filed: November 26, 2007
    Publication date: August 28, 2008
    Inventor: Kenichirou Nagashita
  • FINGERPRINT DETECTION APPARATUS
    Publication number: 20080049989
    Abstract: A fingerprint detection apparatus for obtaining an image of a fingerprint of a finger by using a light source for emitting a light to the finger and an image obtaining part for outputting electric signals in correspondence with received light is disclosed. The fingerprint detection apparatus includes a system controller for determining whether the finger is in contact with or in the vicinity of the image obtaining part by comparing a threshold with a difference between a value of the electric signal when the light source is lit and a value of the electric signal when the light source is not lit.
    Type: Application
    Filed: July 17, 2007
    Publication date: February 28, 2008
    Inventors: Yoichi ISERI, Yoshinori TAHARA, Kenichirou NAGASHITA