Patents by Inventor Dong H. Chang

Dong H. Chang 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: 5181113
    Abstract: A TV system with the functions of Teletext comprising a TV set and a teletext receiving process section, which performs the editing and storing of data received through an antenna in order of determining whether a key interrupt indicates TV mode, teletext mode or memo data mode, so that if the TV mode or the teletext mode is indicated, the associated function is performed according to a given process, performing the corresponding program stored at a memory if the first step indicates the data edit and storing mode, performing each of the programs for storing, fetching and editing the memo data, performing the program for storing the memo data, indicating cursor and switching character mode if the third step indicates the first switching of the TV mode or the teletext mode to the memo data mode, switching the TV set into the TV mode by detecting a memo fetching key if the memo data edited and stored by the user in the third step is indicated on the TV screen, and storing memo identifications and memo data at t
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: January 19, 1993
    Assignee: Goldstar Co., Ltd.
    Inventor: Dong H. Chang
  • Patent number: 5051829
    Abstract: Method for automatically controlling the optimal tuning point for receiving teletext increases or decreases the tuning point of steps of a certain frequency for the byte error at each step tuning point to be detected and memorized so that the tuning point for the minimal byte error is found to provide the optimal tuning frequency for receiving a teletext, thus eliminating the inconvenience of manipulating a key to find the optimal tuning point from the display on a TV screen. The system of the method employs a microprocessor and teletext processor in addition to the tuner.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: September 24, 1991
    Assignee: Goldstar Co., Ltd.
    Inventor: Dong H. Chang