Patent ID: 8049424

Claim:
A light source device comprising: a high pressure discharge lamp; and a trigger wire for starting the lamp, the high pressure discharge lamp including: a light emitting tube having a light emitting portion; a pair of first and second electrode assemblies each having an electrode connected by way of a metal foil with a power supply lead; and a pair of first and second substantially cylindrical sealing portions formed on first and second longitudinal sides of the light emitting portion, respectively, wherein the electrode assemblies are inserted on first and second ends of the light emitting tube and sealed in the first and second substantially cylindrical sealing portions such that the respective first and second electrodes oppose each other in the light emitting portion, wherein a first end of the trigger wire is connected to the power supply lead of the first electrode assembly protruding from the first substantially cylindrical sealing portion, and a second end of the trigger wire is wound around an outer periphery of the second substantially cylindrical sealing portion, wherein a proximity guide portion is disposed at the second substantially cylindrical sealing portion such that the trigger wire is disposed closer to the electrode assembly than an outer peripheral surface of the second substantially cylindrical sealing portion and at a position spaced from the light emitting portion, and wherein the proximity guide portion is a concave groove formed along a peripheral direction at the outer peripheral surface of the second substantially cylindrical sealing portion.