Patent ID: 8723418

Claim:
A light source device including: a high pressure discharge lamp having a pair of electrodes opposed to each other and at least a light-emitting material and a starting gas filled in a discharge chamber of an arc tube, and a pair of electrode sealed portions for encapsulating each of the electrodes by airtightly sealing a portion from the discharge chamber to both ends of the arc tube, and connected by way of electrode leads protruding from end faces of respective electrode sealed portions to a lighting circuit, and a starting light source that radiates a UV-light to the discharge chamber for enhancing the starting performance of the lamp upon starting lighting, wherein the starting light source comprises a discharge tube that generates the UV-light by application of a starting voltage between the electrodes upon starting lighting of the lamp, the discharge tube comprises an internal electrode extending from a pinch seal portion formed on one end thereof to a light-emitting portion, and an external electrode in contact with both of the light-emitting portion and the pinch seal portion, in which the external electrode is formed as a holder of the discharge tube by bending fabrication of a metal sheet into a shape of covering the outer periphery thereof, the holder has one portion of gripping and holding the light-emitting portion, and another portion of gripping and holding the pinch seal portion, and mating top ends thereof are spaced apart to form a slit through which a part of the outer periphery along the longitudinal direction of the internal electrode is exposed, and the holder has a terminal for electric connection fixed to a conductive part applied with a voltage at a polarity opposite to that of the internal electrode.