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1. (WO2018143432) PLANAR LIGHT SOURCE DEVICE AND DISPLAY DEVICE

Pub. No.:    WO/2018/143432    International Application No.:    PCT/JP2018/003662
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Sat Feb 03 00:59:59 CET 2018
IPC: F21S 2/00
F21Y 115/10
Applicants: ENPLAS CORPORATION
株式会社エンプラス
Inventors: TAKIZAWA, Masayo
瀧澤 昌代
SEKI, Akinobu
関 晃伸
Title: PLANAR LIGHT SOURCE DEVICE AND DISPLAY DEVICE
Abstract:
This planar light source device has a pair of substrates, a pair of irradiation plates disposed between the pair of substrates, and a plurality of light emission devices disposed on one or both of the pair of substrates. In a cross-section of the light emission devices in a direction perpendicular to the irradiation plates through an optical axis, the luminosity of light emitted in a 7.0° direction when 0° is the optical axis direction and the luminosity of light emitted in a (tan-1(t/L))° (where t represents the gap between the irradiation plates, and L represents the gap, in a direction along the pair of irradiation plates, from the surface of a light emission device disposed on one of the substrates to an end part of the other-substrate-side irradiation plate) direction or a (tan-1(t/2L))° direction satisfy a prescribed relationship. The luminosity of light emitted from the light emission device in a plane perpendicular to the irradiation plates and the luminosity of light emitted from the light emission devices in a plane parallel to the irradiation plates also satisfy a prescribed relationship.