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:
Mar. 13, 2018
Filed:
Apr. 21, 2016
Coretronic Corporation, Hsin-Chu, TW;
Tao-Hung Kuo, Hsin-Chu, TW;
Hsin-Wen Tsai, Hsin-Chu, TW;
Ching-Chuan Wei, Hsin-Chu, TW;
Chuan-Te Cheng, Hsin-Chu, TW;
Coretronic Corporation, Hsin-Chu, TW;
Abstract
A projection lens and a projection apparatus are provided. The projection lens has a screen side and an image side. The projection lens includes a first lens group, a second lens group, and a third lens group. The first lens group disposed between the screen side and the image side includes a first, a second, and a third lenses arranged sequentially from the screen side to the image side. The second lens group disposed between the first lens group and the image side includes a fourth, a fifth, a sixth, a seventh, an eighth, a ninth, and a tenth lenses arranged sequentially from the screen side to the image side. The third lens group disposed between the second lens group and the image side includes an eleventh and a twelfth lenses, and a distance between the twelfth lens and the light valve is a constant.