Patents by Inventor Shuhei Yasuda

Shuhei Yasuda 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).

  • Patent number: 4338598
    Abstract: A thin-film EL display panel has a plurality of scanning side electrodes and a plurality of data side electrodes. The thin-film EL display panel is excited to emit light through a pre-charge mode, a discharge modulation mode and a write mode. A voltage lower than a modulation voltage is supplied from the data side electrodes to the thin-film EL display panel as a first pre-charge voltage. Thereafter, a difference voltage between the first pre-charge voltage and the modulation voltage is supplied from the scanning side electrodes to the panel as a second pre-charge voltage, thus reducing power consumption to a minimum during the pre-charge mode.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: July 6, 1982
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihiro Ohba, Shuhei Yasuda, Yoshiharu Kanatani
  • Patent number: 4207617
    Abstract: An EL display panel comprising an electroluminescent element made of, for example, a ZnS:Mn layer sandwiched between a pair of dielectric layers exhibits hysteresis properties within light intensity versus applied voltage characteristics. A front electrode is formed on one of the dielectric layers, and a rear electrode is formed on the other dielectric layer in order to apply a sustaining voltage signal across the electroluminescent element for maintaining the memoried display information. An electron beam is applied to a desired position on the EL display panel through the rear electrode at a time when the sustaining voltage signal bears the zero level in order to erase the memoried information. The memoried display information is electrically read out by detecting a polarization relaxation current which flows through a memoried display position when an electron beam is applied thereto.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: June 10, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuhei Yasuda, Toshihiro Ohba, Chugi Suzuki, Masayoshi Koba, Jun Kudo
  • Patent number: 4206460
    Abstract: An EL display panel comprises an electroluminescent element made of, for example, a ZnS:Mn layer sandwiched between a pair of dielectric layers. A front electrode is formed on one of the dielectric layers, and a rear electrode is formed on the other dielectric layer in order to apply a voltage signal across the electroluminescent element. An electron beam is applied to the electroluminescent element through the rear electrode to provide the electroluminescence at the position to which the electron beam is applied. A desired pattern is displayed on the EL display panel by properly controlling the application of the electron beam.
    Type: Grant
    Filed: March 8, 1978
    Date of Patent: June 3, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuhei Yasuda, Toshihiro Ohba, Chuji Suzuki