Patent ID: 8222830
Filing Date: 2012-07-17
Classification: H05B

Abstract:
1. A discharge lamp lighting device comprising: DC power supply circuit that outputs DC power; an inverter circuit that includes a resonance circuit having at least one capacitor and at least one inductor, and converts a DC voltage, which is output by the DC power supply circuit, into an AC voltage, the AC voltage being applied to a discharge lamp; a start detection circuit that detects starting of a discharge in the discharge lamp; and a control circuit that controls the inverter circuit, wherein the control circuit includes: at a time of starting of the discharge lamp, the control circuit first operates in the no-load mode, shifts to the starting improvement mode, in which the glow discharge in the discharge lamp is shifted to an arc discharge, when starting of the discharge in the discharge lamp is detected by the start detection circuit during the no-load mode, and shifts to the lighting mode, after the starting improvement mode is continued for a predetermined time.