| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device and a light source device with high light distribution characteristics in a simple structure. <P>SOLUTION: The light source device 105, installed on a loading plate 102 as an LED bulb 100 covered with a globe 104 of a spherical shell shape, is provided with a substrate 11, a reflector 108 shaped like a frustum of a circular cone arranged at the center of a top face of the substrate 11 with its side face making a sharp angle with the top face at the outside, and a plurality of LED chips 15 arranged so as to surround the reflector 108 on the top face of the substrate 11. The reflector 108 has a light-reflecting function at least at its side face, and the light source device 105 is installed on the loading plate 102 so an underside of the substrate 11 as to be opposed to the loading plate 102. <P>COPYRIGHT: (C)2013,JPO&INPIT |
