Patents by Inventor Ping-Ru Sun

Ping-Ru Sun 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).

  • White-light LED and method for regulating the generated light color of the white-light LED
    Publication number: 20050156181
    Abstract: A white-light light emitting diode (LED) and a method for regulating the generated light color of the LED, wherein the LED has at least one InGaN chip and at least one AlGaInP chip. When forward bias voltages are applied on the InGaN chip or AlGaInP chip, blue light and green-yellow light are generated and further mixed to create white light. By adjusting an external impedance value applied on the LED to regulate the forward bias voltages, pure white light is able to be derived based on the regulated brightness strength of the blue light and green-yellow light.
    Type: Application
    Filed: January 20, 2004
    Publication date: July 21, 2005
    Inventors: Ming-Shun Lee, Ping-Ru Sun