| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface light-emitting lighting device that prevents forming of light-reflecting sheet wrinkles without fail, leading to stable irradiation of planar outgoing light with uniform luminance distribution. <P>SOLUTION: A light guide plate 1 is held on a frame 2 in a way in which first protrusions 16a, 16b, formed in protrusion on an opposite light incidence side on both side end faces of the light guide plate are inserted into first engagement grooves 23a, 23b which are formed on corresponding inner side locations of the frame 2 short-hand side panels 211, 213, opened towards a light outgoing side (front side); and second protrusions 17a, 17b, protruded toward a light-incidence side are inserted into second engagement grooves 24a, 24b which are likewise formed on corresponding inner-side locations of the frame 2 and opened towards the opposite light outgoing side (rear side). Thereby, a wedge-shaped space S, gradually increasing its height towards an opposite light incidence side, is secured between the rear face 13 of the light guide plate and a light reflection sheet 5. <P>COPYRIGHT: (C)2010,JPO&INPIT |
