| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an indoor guiding lamp used not for the purpose of illuminating the portion of level difference, but for the purpose of letting a person know the existence of the level difference. <P>SOLUTION: The guiding lamp comprises a plurality of light-emitting diode elements 300 which are mounted on a substrate 100 and emit light by being supplied with power from a power source 200, a light sensor 400 which detects the luminous intensity of the surroundings, and a control part 500 to which the output 410 of this light sensor 400 is inputted and makes supply power from the power source 200 to the light-emitting diode element 300 when the above output 410 becomes a prescribed value or less. The light-emitting diode element 300 emits the light at a level of brightness which is not to illuminate the surroundings, but to show the existence of itself. <P>COPYRIGHT: (C)2004,JPO |
