DIELECTRIC BARRIER DISCHARGE LAMP LIGHT SOURCE

摘要

A dielectric barrier discharge lamp light source comprises a dielectric barrier discharge lamp (1) filled with a discharge gas that emits light by dielectric barrier discharge and provided with dielectric bodies (7, 8) interposed between at least one of negative and positive electrodes (5, 6) and the discharge gas and a feeding device (9) for feeding an AC high voltage to the electrodes, wherein the feeding device has an abnormal discharge detecting circuit (14) for detecting abnormal discharge inside a transformer (81 or 114) of the feeding device and the portions from the secondary-side output terminals of the transformer to the electrodes so as to stop the feed of the AC high voltage when abnormal discharge is detected. The abnormal discharge detecting circuit has no special abnormal discharge sensor for detecting light, sound, heat, or any chemical substance and detects abnormal discharge only from the electrical behaviour of the feeding device.