Patents by Inventor Katsuhiko Shiomi

Katsuhiko Shiomi 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: 5939844
    Abstract: A high-frequency horizontal deflection/high-voltage generation apparatus capable of setting inductance of a deflecting yoke without being affected by a collector voltage of a horizontal switching transistor and suppressing power loss while increasing a deflecting pulse voltage so that amplitude adjustment and side-pin correction can be effectuated without incurring any appreciable power loss. A voltage which is higher than the collector voltage V.sub.CP of the switching transistor is applied to the deflecting yoke. A resonant circuit is provided for applying to the deflecting yoke a voltage pulse of positive polarity and that of negative polarity, i.e., the voltage pulses bearing opposite phase relation to each other, for increasing equivalently the voltage applied across the deflecting yoke. The switching waveform outputted from the resonant circuit is synchronized with a switching operation of a high-speed switching element driven by a voltage induced in a winding of the deflecting transformer.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: August 17, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuhiko Shiomi, Takafumi Nagasue, Yutaka Sakaue
  • Patent number: 5854532
    Abstract: A deflection yoke device includes vertical deflection coils wound on a pair of cores, respectively, and a pair of horizontal deflection coils each having two longitudinal portions connected to a larger arcuate interconnecting portion and a smaller arcuate interconnecting portion, respectively. The smaller arcuate interconnecting portion is connected generally perpendicularly to the longitudinal portions, respectively, and the larger arcuate interconnecting portion is connected at an acute angle to the longitudinal portions, respectively.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: December 29, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasunobu Kuwahara, Katsuhiko Shiomi