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:
Aug. 02, 2022
Filed:
Feb. 21, 2020
Sumitomo Bakelite Co., Ltd., Shinagawa-ku, JP;
Satoshi Nishino, Shinagawa-ku, JP;
SUMITOMO BAKELITE CO., LTD., Shinagawa-ku, JP;
Abstract
The optical sheet of the present invention is an optical sheet that includes a polarized layer having a polarization function and a light absorbing layer which is formed of a material including a resin and at least one type of light absorbing agent and absorbs light of a specific wavelength range in a visible light range, and is formed of a laminate in which the polarized layer and the light absorbing layer are laminated. The optical sheet has a first peak having an absorptance peak wavelength Pin a wavelength range of 460 nm or more and 510 nm or less and a second peak having an absorptance peak wavelength Pin a wavelength range of 430 nm or more and 680 nm or less in a light absorption spectrum. In addition, in a case where an average transmittance of visible light in the wavelength range of 475 nm or more and 650 nm or less is denoted by Tand a minimum transmittance of visible light in the wavelength range of 475 nm or more and 650 nm or less is denoted by T, T/Tis 0.20 or more.