Patent ID: 6486614
Filing Date: 2002-11-26
Classification: H05B,Y02B

Abstract:
A discharge lamp lighting device comprising:a discharge lamp having a lamp base including a first central electrode and an outer peripheral electrode surrounding the first central electrode, a lighting circuit for lighting the discharge lamp, a starting circuit for starting the discharge lamp to have it lighted, and a lamp socket to which the lamp base of the discharge lamp is mounted, wherein the lamp socket is provided integral with the starting circuit and includes a second central electrode to be connected to the first central electrode of the lamp base and outer and auxiliary electrodes to be connected to the outer peripheral electrode of the lamp base when the lamp base is mounted to the lamp socket, and the device further comprises a power supply means including a pair of lighting output lines and a power supply line, at least one of the lighting output lines supplying a lighting output of the lighting circuit through the starting circuit to the first and second central electrodes, the power supply line being connected through the starting circuit to the auxiliary electrode of the lamp socket, and the power is supplied to the starting circuit when the lamp base of the discharge lamp is mounted to the lamp socket by connecting through: the outer peripheral electrode of the lamp base connected to the outer electrode of the lamp socket when mounted thereto, the auxiliary electrode, the other output line, the lighting circuit and the power supply line.