| 摘要 |
Provided is a backlight device having: a light source element having LEDs and a lens expanding light from the LEDs; a housing containing the element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the element, toward the diffuser plate. The LEDs are arranged in one or more rows, at a central zone. The lens has an incident surface receiving light from the LEDs, and an exit surface from which the light goes out, being expanded. A plurality of the lenses are provided such that the arrangement intervals of the individual lenses at a center and edge regions of the light source element are narrow and dense, and the arrangement intervals of the individual lenses at intervening regions between the center and the edge regions are wide in comparison with those at the center and the edge regions.
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