Patent ID: 6194841
Filing Date: 2001-02-27
Classification: H05B,Y10S

Abstract:
A discharge lamp lighting device comprising:an inverter control integrated circuit configured to provide an oscillation output signal;an inverter including on/off switching elements configured to respond to the oscillation output signal to invert a DC voltage from a DC power supply into high-frequency electric power;a discharge lamp connected to receive said high-frequency electric power from said inverter and to provide a corresponding light output; anda feedback circuit having delayed time T expressed by 1/f.ltoreq.T.ltoreq.1/2,000 with the frequency of said high-frequency electric power being f, said feedback circuit including a reference value setting circuit configured to set a reference value, said feedback circuit being configured to output a voltage for controlling said inverter control integrated circuit to control said high-frequency electric power according to said reference value to thereby perform dimming control of said discharge lamp light output.