| 摘要 |
Even when using a light source reflector having a strong direct reflection tendency in an edge light type planar light source device, the light coming from the primary light source into the light incident end surface and introduced into the light guide is not shielded, the entire luminance lowering is not caused, generation of dark-lines is not caused by shielding of the light to be guided, generation of the bright-lines in the vicinity of light incident end surface is prevented for a long period of time, and generation of sudden local luminance change is prevented. In the light guide (3) using a primary light source (1) in combination with a light source reflector (2), a first light absorption band (36) and a second light absorption band (136) extending along the light incident end surface (31) are arranged in parallel on the light emitting surface (33). The first light absorption band (36) has a width of 50 mum to 800 mum. The first light absorption band (36) has the side edge in the vicinity of the light incident end surface (31) is at a distance of 300 mum or less from the light incident end surface. The second light absorption band (136) has the side edge in the vicinity of the light incident end surface (31) is at a distance of 500 mum to 3000 mum from the light incident end surface.
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