Patent ID: 8487553
Filing Date: 2013-07-16
Classification: G03B

Abstract:
1. A lighting device which supplies power to an electrode of a discharge lamp to light the discharge lamp, comprising: a converting circuit which includes a pair of first switching elements and a pair of second switching elements to which a direct current is input, and converts the direct current into an alternating current by switching between a state where one of the pair of first switching elements and the pair of second switching elements is turned on and a state where the other of the pair of first switching elements and the pair of second switching elements is turned off; a pulse generating circuit which generates a high voltage pulse from the alternating current input from the converting circuit and applies the generated high voltage pulse to the electrode; and a trigger circuit which causes the pulse generating circuit to generate the high voltage pulse, wherein the pulse generating circuit includes a primary winding connected to the trigger circuit and a secondary winding connected to the converting circuit and generates the high voltage pulse by increasing a current input to the secondary winding based on a current input to the primary winding, and the trigger circuit includes