Patents by Inventor Hirokatsu Kubota

Hirokatsu Kubota 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 device using electron beam and method of erasing display screen
    Patent number: 5883669
    Abstract: A device having a display device employing a cathode-ray tube and an electron beam includes an on-screen display memory for storing data used to display white on an entire screen of the cathode-ray tube, a circuit for supplying signals used to display white on the entire screen of the said display device employing the electron beam based on the data stored in the on-screen display memory, and a controller for outputting a signal indicative of a command for displaying white on the entire screen from the on-screen display memory in accordance with a de-energizing operation. The signals used to display white on an entire screen of the cathode-ray tube are output to the display device employing the electron beam after the device having the display device is de-energized. Displayed contents are erased by removing a residual high voltage in the display device employing the electron beam.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: March 16, 1999
    Assignee: Sony Corporation
    Inventors: Noriyuki Hitachiya, Kunio Hakamada, Sumio Baba, Yoshiyuki Idenawa, Hirokatsu Kubota