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. 13, 2020
Filed:
Jul. 16, 2018
Benq Materials Corporation, Taoyuan, TW;
Chen-Kuan Kuo, Taoyuan, TW;
Cyun-Tai Hong, Taoyuan, TW;
Meng-Chieh Chou, Taoyuan, TW;
Chuen-Nan Shen, Taoyuan, TW;
Meng-Jie Lin, Taoyuan, TW;
Chia-Feng Lin, Taoyuan, TW;
Fung-Hsu Wu, Taoyuan, TW;
Meng-Chia Cheng, Taoyuan, TW;
BenQ Materials Corporation, Taoyuan, TW;
Abstract
An optical film includes a first diffraction layer, a second diffraction layer, and a cover layer. The first diffraction layer includes a plurality of first diffraction gratings arranged in the same direction on a surface thereof. The second diffraction layer includes a plurality of second diffraction gratings arranged in the same direction gap-filled the first diffraction gratings of the first diffraction layer, wherein the directions of the first diffraction gratings and the second diffraction gratings are parallel to each other. The cover layer is formed on the second diffraction gratings of the second diffraction layer. At least one of the first diffraction layer, the second diffraction layer and the cover layer contains dyes, and therefore, the optical film can reduce the light leakage defect of a conventional liquid crystal display in a large viewing angles and make the liquid crystal display have uniform dark-state images and colorful images.