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1. (WO2017154841) PLANAR LIGHT-EMITTING MODULE AND LIGHTING APPARATUS

Pub. No.:    WO/2017/154841    International Application No.:    PCT/JP2017/008811
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Mar 07 00:59:59 CET 2017
IPC: F21S 2/00
F21Y 115/10
Applicants: KURARAY CO., LTD.
株式会社クラレ
Inventors: KINOSHITA, Seiji
木下 誠二
Title: PLANAR LIGHT-EMITTING MODULE AND LIGHTING APPARATUS
Abstract:
The present invention suppresses glare occurring in a planar light-emitting module provided with a side-surface-light-receiving-type light guide body. The present invention is a planar light-emitting module provided with a light guide body (20) and light sources (30a-d). The light guide body 20 forms a plate shape having a light-receiving surface (21a), a deflection surface (22), and a light-emitting surface (23). The light sources (30a-d) form rows at a prescribed interval in a direction parallel to the deflection surface. The deflection surface has a plurality of grooves (25a-d) that run parallel to each other. The grooves (25a-d) are disposed in sequence in a direction moving from near the light-receiving surface to farther away from the light-receiving surface. The grooves (25a-d) meander smoothly when the plate shape is viewed in plan view. The phases of the meandering between the plurality of grooves (25a-d) are irregularly displaced from each other. In a cross-section that is parallel to the normal line of the light-receiving surface and the normal line of a reference plane (27) in which the plate shape widens, the inclination angle formed by the tangent of the contour line of the grooves (25a-d) in relation to the reference plane (27) becomes smaller monotonically as the depths within the grooves (25a-d) increase. The inclination angle changes smoothly in accordance with the depth.