Patent ID: 9013115
Filing Date: 2015-04-21
Classification: H05B,Y10S

Abstract:
1. A discharge lamp igniting apparatus comprising: DC power supply means responsive to application thereto of an ON signal to command turning-on of a discharge lamp, for supplying said discharge lamp with a high voltage formed by temporarily superposing a DC superposition voltage on a DC operating voltage, and, after the temporary superposition of said DC superposition voltage, applying said DC operating voltage to said discharge lamp, said discharge lamp being such that current equal to or larger than a predetermined reference current flows when said discharge lamp is ignited successfully; current detecting means for detecting the current flowing through said discharge lamp; control means for stopping said DC power supply means when the current flowing through said discharge lamp as detected by said current detecting means is smaller than said reference current; and disabling means for disabling said control means for a predetermined time period from the time at which said ON signal is applied, said disabling means including a timer measuring said predetermined time period; said predetermined time period being longer than a time period during which said high voltage is required to be supplied to said discharge lamp in order for said discharge lamp to be ignited successfully.