Patents by Inventor Tooru Hanada

Tooru Hanada 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).

  • Display control system for determining connection of optional display unit by using palette
    Patent number: 5488384
    Abstract: In a computer system having a flat panel as standard equipment and allowing a CRT as an optional unit to be connected thereto, first test data common to R, G, and B in all the palettes in a RAMDAC, and each of the R, G, and B display signal levels output from the RAMDAC is compared with a reference level to determine whether a color CRT is connected. Furthermore, in all the palettes in the RAMDAC, the same data as the first test data is written for G, and data smaller than the first test data is written for R and B, and each of the R, G, and B display signal levels output from the RAMDAC is compared with the reference level to determine whether a monochrome CRT is connected.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: January 30, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Keiichi Uehara, Tooru Hanada