| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device having a prolonged emergency lighting time. <P>SOLUTION: The lighting device 100 is provided with a light source 3, a lighting circuit 14 for lighting the light source 3 by power supplied by a commercial power source 1, a battery power source 16 for storing power from the commercial power source 1, and an emergency lighting circuit 18 for performing emergency lighting of the light source 3 by stored power of the battery power source 16 when the power supply from the commercial power source 1 is stopped. The device is further provided with an auxiliary battery power source 42 for storing power generated by a piezoelectric element 5, and when the light source 3 is turned on in emergency, the light source 3 is provided with the stored power from the battery power source 16 and the auxiliary battery power source 42 respectively to turn on the light source 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
