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:
May. 23, 2017
Filed:
Jan. 23, 2015
Tsinghua University, Beijing, CN;
Hon Hai Precision Industry Co., Ltd., New Taipei, TW;
Jun Zhu, Beijing, CN;
Si-Si Xiong, Beijing, CN;
Guo-Fan Jin, Beijing, CN;
Shou-Shan Fan, Beijing, CN;
Tsinghua University, Beijing, CN;
HON HAI PRECISION INDUSTRY CO., LTD., New Taipei, TW;
Abstract
A LED freeform surface illumination system is provided. The LED freeform surface illumination system includes a LED point light source, a freeform surface lens, and a light receiving surface. A light emitting angle φ of the LED point light source is divided into three regions. The freeform surface lens includes a spherical surface and a freeform surface opposite to the spherical surface. The freeform surface comprises three annular regions. Each region of the three regions of the light emitting angle φ of the LED point light source corresponds with one annular region of the freeform surface. Lights of each region of the three regions of the light emitting angle φ of the LED point light source pass the corresponded annular region of the freeform surface to form one rectangular light spot.