The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2008
Filed:
Mar. 30, 2007
Kuang-hua Chang, Taipei, TW;
Chih-huang Wang, Taipei County, TW;
Jie-hyi Chang, Taipei Hsien, TW;
Shiau-wu Lai, Taipei County, TW;
Kai Hsiung Tsao, Taipei, TW;
Guang-yu Yu, Taipei County, TW;
Wen-hu Wang, Taipei, TW;
Kuang-Hua Chang, Taipei, TW;
Chih-Huang Wang, Taipei County, TW;
Jie-Hyi Chang, Taipei Hsien, TW;
Shiau-Wu Lai, Taipei County, TW;
Kai Hsiung Tsao, Taipei, TW;
Guang-Yu Yu, Taipei County, TW;
Wen-Hu Wang, Taipei, TW;
Prodisc Technology Inc., Taipei Hsien, TW;
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.