Abstract:
PROBLEM TO BE SOLVED: To provide a heat-dissipating resin composition capable of giving a molding fully excellent in heat-dissipating ability and heat diffusivity; a molding using the heat-dissipating resin composition; and an illuminating device using the molding.SOLUTION: A heat-dissipating resin composition including a thermoplastic resin material, a spherical filler and a flat filler comprising boron nitride is prepared. The spherical filler contained in the heat-dissipating resin composition has an average particle diameter (Rs) of 10-60 μm, the flat filler has an average particle diameter (Rf) of 5-40 μm and oblateness of the flat filler is 2-30%.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate which uses a resin sheet containing a styrene resin, can advance light incident from a side end surface in the farther distance, and can effectively suppress a possibility of luminance unevenness to occur to a light-emitting surface.SOLUTION: A light guide plate 1 having a light receiving surface 21 and a light-emitting surface 22 on a side end surface side of a resin sheet 2 is provided with the resin sheet 2 which has: a light guide layer 3 that has a side end surface 3a of the light receiving surface 21 and can advance incident light in the direction away from the side end surface 3a; and a back surface layer 4 which is laminated on the surface facing opposite to the light-emitting surface 22 side of right and back surfaces of the light guide layer 3 and is provided with reflection means 8. In the resin sheet 2, at least the light guide layer 3 contains a styrene resin, and a value of an average composition ratio of a styrene with respect to polymer molecules composing the light guide layer 3 is larger than a value of an average composition ratio with respect to polymer molecules composing a resin that forms the back surface layer 4.