| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bulb type lamp in which when a lamp is switched off accompanying connection with a lighting controller of a phase control type, consumption of electric energy is notified to a user, thereby, further energy saving can be made. <P>SOLUTION: The bulb type lamp 10 has a rectifier smoothing circuit 1041 which, by receiving supply of phase-controlled AC power, rectifies and smoothes the AC power and converts into DC power, a light control circuit 1042 which steps down the voltage of the DC power to a voltage corresponding to a phase angle, and an illumination LED unit 100 which is lighted by receiving the stepped-down power supply. Then, the light control circuit 1042 supplies power to the illumination LED unit 100 when the voltage value after step-down is a threshold or more set beforehand, and when the voltage value is lower than the threshold and higher than 0 [V], stops supply of power and switches off the illumination LED unit 100 and makes an alarm LED unit 110 light. <P>COPYRIGHT: (C)2010,JPO&INPIT |
