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:
Oct. 20, 2026
Filed:
Nov. 29, 2021
Goertek Optical Technology Co., Ltd., Shandong, CN;
Pengbo Chen, Weifang, CN;
GOERTEK OPTICAL TECHNOLOGY CO., LTD, Shandong, CN;
Abstract
Disclosed are a projection lens group and a projection device. The projection lens group is used to project light, and includes a first lens group and a second lens group, wherein the first lens group and the second lens group are sequentially arranged in a propagation direction of the light, the first lens group has a positive focal length, the second lens group has a negative focal length. A focal length of the first lens group denoted by f1, and a focal length of the second lens group denoted by f2 satisfy: 120.0 mm<f1<128.0 mm, and −47.0 mm<f2<−40.0 mm. In the present solution, a projection image can be projected with a shorter distance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile