| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light-emitting device which can maintain a function of a traffic signal even at emergency with a simple structure. <P>SOLUTION: The light-emitting device is provided with a light-emitting part 1 (1a, 1b, 1c) in which a plurality of series circuits 11, 12 in which a current limiting element R and one or more solid light-emitting elements L are connected in series are connected in parallel and a lighting device 2 which is connected to an AC power supply AC and supplies a drive voltage to the light-emitting parts 1 by full-wave rectifying the AC voltage. The light-emitting part 1 is provided with an emergency power supply 3 in which the non-lighting period of the solid light-emitting element of at least one series circuit 12 is shorter than the non-lighting period of the solid light-emitting element of the other series circuit and which can light at least the solid light-emitting element of the series circuit 12 having the shorter non-lighting period at the time of cut-off of the AC power supply AC. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
