Patents by Inventor Chen Yen-Hua

Chen Yen-Hua 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).

  • Method that enables the organic light emitting diodes in a displayer to show multiple gray levels
    Publication number: 20040008165
    Abstract: The invention provides a method that enables the organic light emitting diodes in a displayer to show multiple gray levels. The method is using power supply circuits, which are electrically connected to each data line in the displayer, to control each switch in the power supply circuits so as to provide a composite current to its connected data line in order to drive each organic light emitting diode. At this time, the organic light emitting diodes will show multiple gray levels due to different current values.
    Type: Application
    Filed: December 31, 2002
    Publication date: January 15, 2004
    Inventor: Chen Yen-Hua