Patent ID: 6828740
Filing Date: 2004-12-07
Classification: H05B,Y02B,Y10S

Abstract:
An electrodeless discharge lamp operating apparatus characterized in that the electrodeless discharge lamp operating apparatus includes:an electrodeless discharge lamp; an AC/DC conversion unit for converting an alternating current voltage phase-controlled by a dimmer into a direct current voltage; a DC/AC conversion unit for converting the direct current voltage into a high frequency voltage and driving, with the high frequency voltage, the electrodeless discharge lamp so that the electrodeless discharge lamp performs an intermittent operation including an operation period in which the electrodeless discharge lamp is operated and a non-operation period in which the electrodeless discharge lamp is turned OFF; and a dimming control unit for outputting to the DC/AC conversion unit a dimming instruction signal for changing a ratio between the operation period and the non-operation period; and the dimming control unit detects turn-ON and turn-OFF of the phase-controlled alternating voltage and substantially synchronizes timings of the turn-ON and the turn-OFF with start timings of the operation period and non-operation period of the intermittent operation by the DC/AC conversion unit, respectively.