Patents by Inventor Ke-fen Chen

Ke-fen Chen 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).

  • Omnibearing display method and apparatus
    Patent number: 5450094
    Abstract: An omnibearing display, having a display face, with the blanking element in front of the display face, is rotated with a high speed by a rotation actuating mechanism to cyclically and repeatedly appear to eyes of an observer around the display face within a duration of persistence of vision. This results in an effect that observers at any positions around the display face will see the same display face within the duration of persistence of vision, namely, the omnibearing display effect.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: September 12, 1995
    Inventors: Zhe-an Li, Ke-fen Chen, Wei-qing Li