OPTICAL LAYERED BODY

WIPO Patent Application WO/2022/064782

A1

Provided is an optical layered body which has high brightness, is suppressed in brightness unevenness, and has excellent strength as an integrated product, and in which light leakage under a high-humidity environment is suppressed. The optical layered body according to an embodiment of the present invention is provided with: a light guide plate; an adhesive layer disposed in the light guide plate in a dot pattern in a plan view; a low-refractive index reinforcing portion that includes a low-refractive index part and that is disposed in both end portions of the light guide plate along the light-guiding direction; and an optical member layered on the light guide plate with the adhesive layer and the low-refractive index reinforcing portion interposed therebetween. The adhesive layer has formed therein a pattern such that the density of dots increases from a light-entering side of the light guide plate along the light-guiding direction thereof. In an area which is between the light guide plate and the optical member and in which the adhesive layer and the low-refractive index reinforcing portion are not disposed, a low-refractive index layer is disposed so as to be in contact with an adhesive layer-side surface of the light guide plate and/or an adhesive layer-side surface of the optical member. The low-refractive index part and the low-refractive index layer each have a refractive index of 1.30 or less.

MORISHIMA RYOTA (JP)
YOSHIKAWA TAKAHIRO (JP)
HATTORI DAISUKE (JP)

PCT/JP2021/021923

March 31, 2022

June 09, 2021

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NITTO DENKO CORP (JP)

F21S2/00; G02B6/00

WO2017086005A1

2017-05-26

US20180224696A1	2018-08-09
JPH11224519A	1999-08-17
JP2018123299A	2018-08-09
JP2003315792A	2003-11-06
US20100067257A1	2010-03-18

MOMII Takafumi (JP)

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