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:
Feb. 18, 2025
Filed:
Oct. 30, 2020
Shenzhen Guohua Optoelectronics Co., Ltd., Guangdong, CN;
Climad Technology B.v., Nijmegen, NL;
Augustinus Jozef Johannes Kragt, Nijmegen, NL;
Xiaowen Hu, Guangdong, CN;
Guofu Zhou, Guangdong, CN;
SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., Shenzhen, CN;
CLIMAD TECHNOLOGY B.V., Nijmegen, NL;
Abstract
A multilayer film and a preparation method thereof is provided, and belongs to the technical field of optical films. The provided multilayer film comprises an ultraviolet blocking material and a cholesteric liquid crystal layer. The cholesteric liquid crystal layer comprises a polymerizable liquid crystal monomer, a polymerizable chiral dopant and a photoinitiator. The multilayer film can filter ultraviolet rays and near infrared rays in natural light, thereby reducing the heat effect of the natural light and harms of the ultraviolet rays to people and objects. In addition, the multilayer film has a high visible light transmission rate, which does not distort the color of the natural light passing through.