LIQUID CRYSTAL LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a liquid crystal lighting device which meets a demand of high precision by preventing occurrence of stripes due to a black matrix of a liquid crystal unit.

SOLUTION: A prism array (21) is formed by carving a front face (20b) of a light guide plate (20) so as to form V shaped valleys (221-226) of which the depths (d1-d6) get larger as going farther from a light source device (30). Center positions of first slopes (221a-226a) of the valleys facing the light source side are made to coincide with center positions of the first black matrix (13a) of the liquid crystal unit (10).

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