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1. (WO2017154050) BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE

Pub. No.:    WO/2017/154050    International Application No.:    PCT/JP2016/003849
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Aug 25 01:59:59 CEST 2016
IPC: F21S 2/00
F21V 9/08
G02F 1/13357
F21Y 115/10
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: SASAKI, Hisanori
佐々木 久昇
YAMANO, Yoshikazu
山野 義一
Title: BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE
Abstract:
A backlight device (20) is provided with: a reflecting sheet (23) having a reflecting surface; a plurality of light sources (21) aligned with each other on the reflecting surface; a luminance uniformizing plate (24) having a first surface, which faces the reflecting surface, and to which light emitted from the light sources (21) is inputted directly or after being reflected by the reflecting surface, and a second surface from which the light inputted to the first surface is outputted; and a diffusion plate (25) which diffuses and outputs the light outputted from the second surface. The luminance uniformizing plate (24) is divided, by means of boundary sections (241), into a plurality of sections (242) each having at least one of the light sources (21), said boundary sections being formed protruding to the first surface side, and in each of the sections (242), luminance uniformizing plate (24) light transmittance per unit area has a positive correlation with a distance from each of the light sources (21) at least within a range excluding a region on the optical axis of each of the light sources (21), said range being in each of the sections (242).