| 摘要 |
PROBLEM TO BE SOLVED: To emit a required and sufficient ultraviolet ray into a discharge vessel of a high-pressure discharge lamp, by starting discharge of a start-up light source at a low start-up voltage, thereby enhance startability.SOLUTION: A light source device includes the high-pressure discharge lamp (1) connected to a light-on circuit, and the start-up light source (3) for emitting the ultraviolet ray for enhancing start-up performance when starting light-on of the lamp, toward the discharge vessel (5) of the lamp (1), the start-up light source is formed of a discharge tube (18) for generating the ultraviolet ray by generating the discharge between an internal electrode (19) provided in an inside of a light emitting portion thereof, and an external electrode (20) provided in an outside of the discharge tube, by the start-up voltage impressed between the electrodes when starting up the light-on of the lamp, and at least one charge concentration part forming metal piece (29) is sealed separately from the internal electrode, in a light emitting portion (23a) thereof. |
