Patent ID: 6583574
Filing Date: 2003-06-24
Classification: H05B

Abstract:
A power saver for discharge lamps comprising:a first coil; a second coil having a winding direction opposed to a winding direction of the first coil, the second coil being located in an opposite direction of the first coil; an insulator located at a gap where the first coil and the second coil are opposed; at least one tap arranged along a longitudinal direction of the second coil; at least one first switch selectively connected to one of the at least one tap; a second switch mounted in a loop circuit including both end parts of the first coil; and a timer connected to the first and second switch, wherein in the taps and the first switches, only one switch is connected to only one tap at the same time, and wherein at the time of an initial power supply the discharge lamps are in a lighted state, the first switches are all opened and the second switch is shut, and the timer is operated to shut one of the first switches and to open the second switch when a prescribed period of time passes after lighting of the discharge lamp is finished by the current.