Patents by Inventor Guan-Hung Wu

Guan-Hung Wu 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 and apparatus for testing light-emitting device
    Patent number: 8749773
    Abstract: Disclosed is a method for testing a light-emitting device comprising the steps of: providing an integrating sphere comprising an inlet port and a first exit port; disposing the light-emitting device close to the inlet port of the integrating sphere; providing a current source to drive the light-emitting device to form an image of the light-emitting device in driven state; providing an image receiving device and to receive the image of the light-emitting device, wherein the image receiving device is connected to the first exit port of the integrating sphere; and determining a luminous intensity of the light-emitting device according to the image. An apparatus for testing a light-emitting device is also disclosed.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: June 10, 2014
    Assignee: Epistar Corporation
    Inventors: Tang-Chung Chao, Pei-Hsiang Tseng, Jia-Kuan Kuo, Guan-Hung Wu, Yuan-Hao Su, Chi-Hsin Ho, Chia-Liang Hsu, Chih-Chiang Lu