Method for producing a wedge-shaped light guide plate, planar illuminator using the light guide plate and a wedge-shaped light guide plate

摘要

PURPOSE:Not only to print a printed dot but also to '''quantitatively' perform various kinds of works on a worked surface for reflection. CONSTITUTION:This wedged light transmission plate 1 is provided with a light entering side surface S1 which is wide and where light from a light source 2 enters, a narrow side surface S4 positioned on an opposite side to the side surface S1, a light exiting surface S2 crossing with both side surfaces S1 and S4, and the worked surface for reflecting light S3 positioned on an opposite side to the exiting surface S2; and white dots 6 are printed on the worked surface S3 so that a printing area per unit is gradually increased from the side surface S1 to the side surface S4.