Patent ID: 8228006
Filing Date: 2012-07-24
Classification: H05B,Y02B,Y10S

Abstract:
1. A high pressure discharge lamp lighting device comprising, an inverter having an output terminal and being configured to apply a lighting voltage to a high pressure discharge lamp through said output terminal, an igniter comprising a capacitor, a switching element, and a transformer, said capacitor being configured to be charged by a voltage source, said transformer comprising a primary winding and a secondary winding, said primary winding being connected across said capacitor in series with said switching element, said secondary winding being connected in series with the high pressure discharge lamp, and being connected across said inverter, a controller being configured to turn on and turn off said switching element, said controller being configured to turn on said switching element in order to allow the capacitor to discharge for applying a discharging current to the primary winding, whereby the controller is configured to apply the starting pulse voltage which is generated in said secondary winding and which is generated by the discharge current which flows through the primary winding to the high pressure discharge lamp, a pulse voltage detection circuit being configured to detect a voltage indicative of the starting pulse voltage applied to said high pressure discharge lamp, and generate a detection signal corresponding to said starting pulse voltage, a starting pulse voltage regulation circuit being configured to regulate the starting pulse voltage to a predetermined value according to the detection signal, wherein said pulse voltage detection circuit being configured to detect the starting pulse voltage or a pulse voltage which is caused across a specific circuit component of said igniter as the voltage indicative of the starting pulse voltage applied to said high pressure discharge lamp.