| 摘要 |
A planar light source device comprises a cold cathode fluorescent tube having ends, which are held by holders, a light guide having an end surface facing the cold cathode fluorescent tube and the holders, a light exit surface from which light exits, and a counter surface opposing to the light exit surface, and a reflecting sheet, which is arranged to face the counter surface. The reflecting sheet has tongue portions arranged between the light guide and each of the holders.
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