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1. (WO2018220978) OPTICAL MEMBER, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, AND ILLUMINATION DEVICE

Pub. No.:    WO/2018/220978    International Application No.:    PCT/JP2018/013135
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: G02B 5/02
F21S 2/00
G02F 1/13357
G09F 9/00
F21Y 105/10
F21Y 115/10
Applicants: SONY CORPORATION
ソニー株式会社
Inventors: FURUKAWA, Norimasa
古川 徳昌
ASAKAWA, Hiroki
浅川 弘樹
Title: OPTICAL MEMBER, LIGHT-EMITTING DEVICE, DISPLAY DEVICE, AND ILLUMINATION DEVICE
Abstract:
Provided is an optical member whereby desired light distribution characteristics are obtained despite the optical member having a simple structure. The optical member has a first transparent optical sheet and a second transparent optical sheet superposed on each other in a first axis direction. The first transparent optical sheet includes a structure in which a first region portion for emitting first emission light comprising first incident light refracted in a first direction along a second axis direction and a second region portion for emitting second emission light comprising second incident light refracted in a second direction oriented oppositely to the first direction are alternately arranged in the second axis direction. The second transparent optical sheet includes a structure in which a third region portion for emitting third emission light comprising third incident light refracted in a third direction along a third axis direction and a fourth region portion for emitting tourth emission light comprising fourth incident light refracted in a fourth direction oriented oppositely to the third direction are alternately arranged in the third axis direction. The angle of the third axis direction with respect to the second axis direction is 0° to less than 45°.