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. 18, 2020
Filed:
Jul. 13, 2018
Fujifilm Corporation, Tokyo, JP;
Takao Taguchi, Minamiashigara, JP;
Kazuhiro Oki, Minamiashigara, JP;
Mitsuyoshi Ichihashi, Minamiashigara, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The half mirror includes a retardation layer, a circularly polarized light reflecting layer, and a front panel that are disposed in this order. The retardation layer has a front phase difference as measured at a wavelength of 500 nm of 107 to 127 nm and a front phase difference as measured at a wavelength of 475 nm of 110 to 130 nm. The circularly polarized light reflecting layer includes three cholesteric liquid crystal layers. The three cholesteric liquid crystal layers have different selective reflection center wavelengths λ1, λ2, and λ3. The center wavelengths λ1, λ2, and λ3 satisfy 380 nm<λ1<500 nm and 520 nm<λ2<λ3<780 nm. The cholesteric liquid crystal layer having the center wavelength λ1 is disposed nearest to the front panel side.