Patent ID: 6502948
Filing Date: 2003-01-07
Classification: G02B

Abstract:
A surface lighting device, comprising:a point light source which is fixed on a substrate; a stick type light guide body which receives a light emitted from a light emitting surface of said point light source from an end surface in the longitudinal direction and emits the received light from a side surface in the longitudinal direction; and a light guide plate which receives the light emitted from said stick type light guide body at a first side surface and emits the received light from an upper surface; wherein one of a fitting concave portion and a fitting protruding portion is formed on a predetermined position of said substrate, the other of said fitting concave portion and said fitting protruding portion is formed on a predetermined position of said stick type light guide body, and said point light source and said stick type light guide body are relatively positioned by fitting said fitting protruding portion into said fitting concave portion.