| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a novel light device, traffic signal light device and antireflecting unit that obviates the need for a mast for mounting antenna without spoiling the view of roads. <P>SOLUTION: The traffic signal light device includes: an optical unit 104 having a light guide plate 310 planarly emitting light incident from a side face, and a light emitter 303 disposed at the side face of the light guide plate; and a patch antenna 106, where a patch element 305 and a ground element 306 are arranged in the optical unit 104, the patch element 305 is disposed in the rear of the light guide plate 310, and the ground element 306 is disposed in the rear of the patch element 305. <P>COPYRIGHT: (C)2010,JPO&INPIT |
