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:
Sep. 06, 2022
Filed:
May. 05, 2020
Fujifilm Corporation, Tokyo, JP;
Shinichi Yoshinari, Kanagawa, JP;
Ayako Muramatsu, Kanagawa, JP;
Naoya Shibata, Kanagawa, JP;
Kunihiro Atsumi, Kanagawa, JP;
Daisuke Kashiwagi, Kanagawa, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide is an optical laminate film exhibiting excellent uniformity in reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent uniformity in reflection tint when turned off. The object is achieved by providing an optical laminate film including a polarizer, a phase difference layer, and a circularly polarized light separating layer in this order, in which an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged to form an angle of 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase, in a case where an average refractive index of the liquid crystal compound forming the circularly polarized light separating layer is n, a birefringence thereof is Δn, and a selective reflection center wavelength thereof is λ, it is 'ReMAX [nm]=k×Δn×λ/n (where k=0.213)', and an in-plane retardation Re(550) of the circularly polarized light separating layer satisfies '0.5×ReMax≤Re(550)≤R.