LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To enable to control directivity without using an optical improving sheet or a display panel and to enable to give directivity in a desired direction as well as strength and weakness of directivity.

SOLUTION: A light guide member 20 is arranged along an incident face 11 which is one surface of the peripheral faces of a light guide plate 10 formed in a rectangular shape. Light is introduced from a light source 31 arranged opposed to a light introduction face 21 being one end face in longitudinal direction to the light guide member 20. The light guide plate 10 controls light distribution along the face crossing at right angles to the longitudinal direction of the incident face 11 by adjusting the direction of light emitted from the outgoing face 12. The light guide member 20 controls light distribution along the incident face 11 of the light guide plate 10 by adjusting the direction of light emitted from the light leading out face 22.

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