| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively display a large pattern and to surely turn on many light emitting diodes with more uniform brightness without adjustment even when changing the number of light emitting diodes. SOLUTION: A lighting device is connected to a power supply device 3 in a state in which leads 2 of a plurality of light emitting diodes 1 are electrically connected. The power supply device 3 is provided with a flexible insulating layer 4 and a conductive foam layer 5 laminated on both surfaces of the insulating layer 4. The conductive foam layer 5 is made of a synthetic resin foam with leads 2 of light emitting diodes 1 inserted thereto and has conductivity to be conductive to leads 2 of inserted light emitting diodes 1 and has flexibility to be deformed together with the insulating layer 4. In the lighting device, a pair of leads 2 of a light emitting diode 1 are inserted to the conductive foam layer laminated on both surfaces of the insulating layer 4, and the conductive foam layer 5 is connected to a power source, and power is supplied from the conductive foam layer 5 to the leads 2 of the light emitting diode 1 to turn on the light emitting diode. COPYRIGHT: (C)2005,JPO&NCIPI
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