Patent ID: 8203270
Filing Date: 2012-06-19
Classification: H01J

Abstract:
1. A light source device including; a high pressure discharge lamp in which a discharge chamber having a pair of electrodes opposed each other and at least mercury and a starting gas filled therein is formed in the center of an arc tube, a pair of electrode seal portions extend from the discharge chamber to both ends of the arc tube, and connected by way of electrode leads extending from end faces of the electrode seal portions to a lighting circuit, a concave reflector to which the lamp is secured by inserting one electrode seal portion thereof through a bottom hole opened in the bottom of the reflector; and a start assisting light source that radiates UV-light to the discharge chamber for enhancing the starting performance of the lamp upon startup lighting of the lamp, wherein the start assisting light source comprising an airtight vessel formed of ceramics and filled with a rare gas and a pipe member penetrating through the vessel is mounted to the electrode lead protruding from the end face of the one electrode seal portion secured to the bottom hole of the concave reflector by inserting the electrode lead through the pipe member, and the airtight vessel is formed entirely or at a portion opposing the end face of the one electrode seal portion with translucent ceramics.