Patents by Inventor Yann T. Hsieh

Yann T. Hsieh 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: 5198803
    Abstract: A large scale electronic display board system for displaying images in response to an image signal. The system has a light emitting diode (LED) display for displaying images in multiple gray levels. The LED display has an N.times.M array of LEDs. Each LED has a corresponding driving circuit which linearly controls the gray level of the LED.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: March 30, 1993
    Assignee: Opto Tech Corporation
    Inventors: Jin S. Shie, Jiann C. Horng, Kwang S. Tone, Kuang C. Tao, Yann T. Hsieh, Shou C. Chiou, Der C. Yue