Patents by Inventor Yuichi Kunita

Yuichi Kunita 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).

  • Apparatus for suppressing electric field radiation from a cathode ray tube
    Patent number: 6049173
    Abstract: An anode ripple voltage waveform is detected by a capacitor built into a flyback transformer. The detected waveform is then phased by a phasing circuit, amplitude adjusted by an amplitude adjusting circuit and subsequently delivered to an addition circuit. A horizontal component is detected by a horizontal output transformer, then phase adjusted by a phasing circuit and subsequently amplitude adjusted by an amplitude adjusting circuit. Thereafter, the horizontal component is added to the anode ripple component by the addition circuit, inverted and amplified by an inverting amplifier, and then supplied to an antenna arranged in proximity to the cathode ray tube. Thus, electric fields radiated from the face of the cathode ray tube are suppressed.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: April 11, 2000
    Assignee: Nanao Corporation
    Inventors: Takashi Murata, Yuichi Kunita
  • Apparatus for suppressing electric field radiation from a cathode ray tube
    Patent number: 5965987
    Abstract: An anode ripple voltage waveform is detected by a capacitor built into a flyback transformer. The detected waveform is then phased by a phasing circuit, amplitude adjusted by an amplitude adjusting circuit and subsequently delivered to an addition circuit. A horizontal component is detected by a horizontal output transformer, then phase adjusted by a phasing circuit and subsequently amplitude adjusted by an amplitude adjusting circuit. Thereafter, the horizontal component is added to the anode ripple component by the addition circuit, inverted and amplified by an inverting amplifier, and then supplied to an antenna arranged in proximity to the cathode ray tube. Thus, electric fields radiated from the face of the cathode ray tube are suppressed.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: October 12, 1999
    Assignee: Nanao Corporation
    Inventors: Takashi Murata, Yuichi Kunita