Patents by Inventor Ching-Hsiang Feng

Ching-Hsiang Feng 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).

  • Scan circuit and method for keyboard
    Patent number: 6961008
    Abstract: A keyboard scan circuit for a device receiving plural inputs simultaneously is provided. The scan circuit includes a plurality of keyboard input/output ports, each of which can be selected from a group consisting of an input mode, an output mode, and a floating mode for receiving one of a plural inputs, a plurality of rectangular matrices including a plurality of detectable input terminals and a plurality of synchronously detectable input terminals and formed by means of cross-linking the keyboard input/output ports, and a plurality of current-isolating elements electrically connected between the keyboard input/output ports and the rectangular matrices for mutually isolating signals of the rectangular matrices.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: November 1, 2005
    Assignee: Winbond Electronics Corp.
    Inventor: Ching-Hsiang Feng
  • Scan circuit and method for keyboard
    Publication number: 20030179111
    Abstract: A keyboard scan circuit for a device receiving plural inputs simultaneously is provided. The scan circuit includes a plurality of keyboard input/output ports, each of which can be selected from a group consisting of an input mode, an output mode, and a floating mode for receiving one of a plural inputs, a plurality of rectangular matrices including a plurality of detectable input terminals and a plurality of synchronously detectable input terminals and formed by means of cross-linking the keyboard input/output ports, and a plurality of current-isolating elements electrically connected between the keyboard input/output ports and the rectangular matrices for mutually isolating signals of the rectangular matrices.
    Type: Application
    Filed: June 18, 2002
    Publication date: September 25, 2003
    Applicant: Winbond Electronics Corp.
    Inventor: Ching-Hsiang Feng