To achieve high brightness of a planar lighting system and homogenization of the brightness.
A light beam LR 3 emitted backward from side faces 24b, 24c of an LED 24, is enabled to be reflected forward by a front slanted face of a fine prism 40 of a reflecting plate 38 and to be incident into the light guide plate 12. Moreover, by reflecting the light beams LF 4, LF 5 emitted forward from the side faces 24b, 24c of the LED 24 on the front slanted face of the minute prism 40, an incident light angle to the light guide plate 12 is alleviated, and proportion of the light reaching the tip part of the light guide plate 12 is improved. As for the minute prism 40 of the reflecting plate 38, the front slanted face is formed comparatively moderately slanted and the rear slanted face is formed comparatively steeply slanted.
NAKAYAMA DAISUKE
Miyazaki Yoshio
Kaoru Onozuka
Akio Tagami
High Masahiro
Toshio Nakamura