PROBLEM TO BE SOLVED: To provide a light guide plate that can reduce ununiformity of linear luminance at a connection part between inkjet heads.;SOLUTION: In the light guide plate 1 wherein light reflecting dots are formed on at least one surface S2 of a light guide plate base material 11, a plurality of light reflecting dots 12 are formed on the lattice points which are lattice points as a printing target and are regularly arranged in two-dimensional state, on each region made by dividing at least one surface S2 of the light guide plate base material 11 into a plurality of regions. A part of light reflecting dots among the plurality of light reflecting dots 12 are thinned out on individual regions.;COPYRIGHT: (C)2013,JPO&INPIT
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