| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED bulb suitable for being used as an alternative means of a halogen lamp for example. <P>SOLUTION: The LED bulb includes a light source part 300 having an LED chip 310, a casing 200 which has a bottom part 201 supporting the light source part 300 and a sidewall part 202 surrounding the light source part 300 and is open on one side in a first direction, a base 600 fixed to the casing 200 on the other side of the first direction, and a light guide body 400 which is arranged in a space surrounded by the sidewall part 202 and includes an incident face 410 opposed to the light source part 300, an emission face 420 for emitting light incident from the incident face 410 to the one side of the first direction, and a circumferential face 430 which is positioned between the incident face 410 and the emission face 420 and of which the cross-sectional shape becomes larger as it goes nearer the emission face 420 side from the incident face 410 side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
