| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure the extent and brightness of a shining range of a light guide body, and give an impression of fluctuating brightness as a whole. <P>SOLUTION: The light guide body 252 has a cylindrical shape, and yellow LEDs 261 with respective light axis directions thereof inclined are installed in a cavity. At the outer peripheral part of the light guide body 252, triangular cross-sectional ridges each protruding in a triangular shape in the lateral cross-sectional shape are formed along the longitudinal direction of the light guide body 252. Furthermore, on the outer peripheral surface of the light guide body 252, irregular fine asperities having for example the average diameter of 5 to 10 μm, and depth of 10 μm or so are formed. Some of the plurality of LEDs 261 blink periodically while the other ones blink at random based on detection of vibrations or the like by a piezoelectric sensor, and as light rays thereof are synthesized or diffused while being reflected internally in the light guide body 252, as a whole, brightness changes in the longitudinal direction and the circumferential direction of the light guide body 252, producing an irregular feeling. <P>COPYRIGHT: (C)2010,JPO&INPIT |
