| 摘要 |
<P>PROBLEM TO BE SOLVED: To uniformly and brightly illuminate a front surface glass of a pedestrian signal with the use of a plurality of LEDs. <P>SOLUTION: The LED lamp is coupled in free replacement by screwing into a socket 5 provided at a center part of a reflector 4 of a concave mirror having an opening 43 as a quadrangle. The LED lamp consists of a coupling part 11 made by providing male screws 12 on an outer periphery screwed in and coupled with the socket 5, and a lamp body 10 equipped with a plurality of LEDs 2 made by being fixed to the coupling part 11. The lamp body 10 is provided with a polygonal cylinder 15 made by arranging a plurality of rectangular side surface substrates 15A in a polygonal cylinder shape and closing its top surface with a front substrate 15B. In the polygonal cylinder 15, its central axis is arranged coaxially with the male screw 12 of the coupling part 11, and the plurality of LEDs 2 are fixed on the surface of the side surface substrates 15A and the front surface substrate 15B. Further, the side surface substrates 15A separate the plurality of LEDs 2 in a length direction and fix them, with the number of LEDs 2 arranged at its tip in a width direction made larger than that at its rear end. <P>COPYRIGHT: (C)2012,JPO&INPIT |
