| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED electric bulb that can uniformly illuminate the surroundings. <P>SOLUTION: The LED electric bulb having a built-in LED includes a columnar light guide body for receiving light emitted from the LED on one end side and guiding the received light to the other end side through a shaft part and emitting the guided light from the other end side. The light guide body is arranged on an end face on the other end side, and the light guide body has a recessed part made of an approximately conical shape which has approximately the same axis with the axis of the shaft part and is gradually tapered to one end side of the light guide body, and a first curved surface arranged to make an end face and a side face of the other end side approximately continue each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
