| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a lighting system of direct lighting type using a point light source which is thin and light in weight with no frame. <P>SOLUTION: In the lighting system, a point light source is arranged on the rear face of a transparent light guide plate, a light incident prism having the top-most vertex on right above the center of emission of the point light source is formed at the light irradiation surface of the light guide plate, and fine prisms split into a plurality of pieces are formed on the reflecting surface of the light incident prism. Furthermore, second fine prisms are formed on the rear face of the light guide plate, and a light diffusion plate is provided on the light irradiation surface side of the light guide plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
