Patents by Inventor Tsamu Hirai

Tsamu Hirai 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).

  • Publication number: 20010036362
    Abstract: A strobe control device for a camera is provided with a light amount measuring system that measures amount of light emitted by a strobe and reflected by an object, a comparing system that compares the measured light amount with a reference exposure light amount. The reference exposure light amount is determined in accordance with a reference control level, the strobe is controlled to stop emitting light when the measured light amount has reached the reference exposure light amount. The strobe control device is further provided with a colorimetry system that determines a color of the object, a reflection compensation value determining system that determines a compensation value for compensating for errors depending on a reflectivity of an object, and a compensation system that compensates for the reference control level in accordance with the reflection compensation value.
    Type: Application
    Filed: April 19, 2001
    Publication date: November 1, 2001
    Applicant: ASAHI KOGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Tsamu Hirai, Yoshikazu Iida