Patents by Inventor Hidehiro Fukumoto

Hidehiro Fukumoto 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).

  • Optical distance measuring apparatus and method using light projection pulses
    Patent number: 5082363
    Abstract: In a distance measuring apparatus for optically detecting a distance to an object by using a triangulation method, two signals which are obtained from a position sensitive device are added and it is detected that the result of the addition has exceeded a predetermined threshold level. On the other hand, it is assumed that a signal waveform to drive a light emitting device is a signal whose level increases with an elapse of time. When the addition result exceeds the threshold level, the level of the drive signal is held constant. At this time, by dividing a signal obtained from the position sensitive device by the signal indicative of the addition result, a signal relating to the distance to the object is obtained.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: January 21, 1992
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Hiroaki Nakanishi, Hidehiro Fukumoto, Kuniharu Shibata, Hidetoshi Matsumoto