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1. (WO2018021102) BACKLIGHT FILM

Pub. No.:    WO/2018/021102    International Application No.:    PCT/JP2017/026048
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Thu Jul 20 01:59:59 CEST 2017
IPC: G02F 1/13357
G02B 5/20
H01L 33/50
Applicants: FUJIFILM CORPORATION
富士フイルム株式会社
Inventors: KUNIYASU Satoshi
國安 諭司
TOYAMA Hirofumi
遠山 浩史
Title: BACKLIGHT FILM
Abstract:
The present invention addresses the problem of providing a backlight film with less variation in the luminance. The problem is solved by the backlight film that includes a wavelength conversion film including a wavelength conversion layer and gas barrier films sandwiching the wavelength conversion layer, and an end face sealing layer for sealing the end face of the wavelength conversion film, wherein the wavelength conversion film satisfies the following formula (1): |(L1 − L0) / L0 | × 100 ≤ 5[%] … Formula (1) wherein L0 represents light emission luminance when 3 minutes have passed since the start of irradiation and L1 represents light emission luminance when 24 hours have passed since the start of irradiation, provided that the wavelength conversion film is irradiated with light with a central wavelength of 455 nm emitted from a light-emitting diode under the condition that the illuminance of the surface of the wavelength conversion film is 0.1 W / cm2.