Patents by Inventor Jie-Hyi Chang

Jie-Hyi 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).

  • PROJECTION SYSTEM AND LIGHT TUNNEL THEREOF
    Publication number: 20080157004
    Abstract: A light tunnel includes a first optical element, a second optical element, a third optical element and a fourth optical element. The first optical element has a first recess. The second optical element is disposed opposite to the first optical element and has a second recess. The third optical element connects the first optical element with the second optical element and has one end disposed in the first recess or the second recess. The fourth optical element is disposed opposite to the third optical element, connects the first optical element with the second optical element, and has one end disposed in the first recess or the second recess. Inner surfaces of the first to fourth optical elements form a light passage. A projection system is also disclosed.
    Type: Application
    Filed: March 30, 2007
    Publication date: July 3, 2008
    Inventors: Kuang-Hua Chang, Chih-Huang Wang, Jie-Hyi Chang, Shiau-Wu Lai, Kai Hsiung Tsao, Guang-Yu Yu, Wen-Hu Wang
  • Projection system and light tunnel thereof
    Patent number: 7386215
    Abstract: A light tunnel includes a first optical element, a second optical element, a third optical element and a fourth optical element. The first optical element has a first recess. The second optical element is disposed opposite to the first optical element and has a second recess. The third optical element connects the first optical element with the second optical element and has one end disposed in the first recess or the second recess. The fourth optical element is disposed opposite to the third optical element, connects the first optical element with the second optical element, and has one end disposed in the first recess or the second recess. Inner surfaces of the first to fourth optical elements form a light passage. A projection system is also disclosed.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: June 10, 2008
    Assignee: Prodisc Technology Inc.
    Inventors: Kuang-Hua Chang, Chih-Huang Wang, Jie-Hyi Chang, Shiau-Wu Lai, Kai Hsiung Tsao, Guang-Yu Yu, Wen-Hu Wang