| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent light coming from a primary light source made incident on the optical incidence end surface and conducted into an optical conductor from being shielded, even when a light source reflector is used with strong specular reflection tendency in a surface light source apparatus of an edge light method; to stop causing deterioration in overall luminance or a dark line due to shielding of the light which should be optically projected; and to prevent an emission line from being generated in the vicinity of an optical incidence end surface over a long period of time, and a locally rapid variation in luminance from occurring. <P>SOLUTION: The optical conductor 3 is used in combination with the primary light source 1 and a light source reflector 2 in the surface light source apparatus. A first optical absorption belt 36 and a second optical absorption belt 136 extended along the optical incidence end surface 31 are installed in parallel in an optical emission surface 33. The width of the first optical absorption belt 36 is ≥50 μm and ≥800 μm, the distance of a side edge which is close to the optical incidence end surface 31 in the first optical absorption belt 36 from the optical incidence end surface 31 is ≤300 μm and the side edge which is close to the optical incidence end surface 31 in the second optical absorption belt 136 is positioned 500 μm to 3,000 μm away from the optical incidence end surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
