Dielectric barrier discharge lamp light source

摘要

A dielectric barrier discharge lamp light source device having a discharge space filled with a discharge gas that emits light through dielectric barrier discharge. The device is provided with a dielectric barrier discharge lamp having a structure in which dielectrics are interposed between at least one of two electrodes to induce a discharge phenomenon in the discharge gas, and a power supply device for providing alternating current high voltage to the electrodes of the dielectric barrier discharge lamp. The power supply device further includes an abnormal discharge detection circuit for detecting an abnormal discharge occurring within transformers in the power supply device or within a section from the secondary side output terminal of a transformer to the electrodes, the power supply device acting to halt the supply of alternating current high voltage from the power supply device to the dielectric barrier discharge lamp when the abnormal discharge detection circuit detects abnormal discharge. The abnormal discharge detection circuit has the ability to detect only an abnormal discharge arising from electrical behavior of the power supply device without being a detector of special abnormal discharge due to photo, acoustic, thermal or chemical conditions.