Patents by Inventor Ziqing Zhang

Ziqing Zhang 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).

  • Speaker system for use in an automobile vehicle
    Patent number: 5966453
    Abstract: A speaker system for use in an automobile vehicle, comprises: a pair of high frequency speakers disposed at opposite ends in a lateral direction of a front section within the vehicle; a pair of low/middle frequency speakers disposed at opposite ends in a lateral direction of the front section, a whole frequency speaker located in the center of the front section. Each of the high frequency speakers is a horn speaker made from a part of a windshield, a part of a side glass and a part of an upper surface of a dashboard in the vehicle.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: October 12, 1999
    Assignee: Pioneer Electronic Corporation
    Inventors: Shinji Koyano, Teruo Baba, Ziqing Zhang, Junko Yamamoto
  • Line source speaker system
    Patent number: 5953432
    Abstract: A plurality of speakers are arranged in line, and a plurality of digital filters are provided for the speakers. Each of the digital filters is applied with a plurality of audio signals. Characteristics of each digital filter is adjusted so as to provide patterns of directivity to each speaker dependent on the input audio signals.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: September 14, 1999
    Assignee: Pioneer Electronic Corporation
    Inventors: Hirofumi Yanagawa, Ziqing Zhang