Patent ID: 6495972
Filing Date: 2002-12-17
Classification: H05B,Y02B

Abstract:
A dielectric barrier discharge lamp light source device having a discharge space filled with a discharge gas that emits light through a dielectric barrier discharge, said dielectric barrier discharge lamp light source device comprising:a dielectric barrier discharge lamp having dielectrics interposed between at least one of a first electrode and a second electrode to induce a discharge phenomenon in said discharge gas; and; a power supply device for providing alternating current high voltage to said first electrode and said second electrode, said power supply device including an abnormal discharge detection circuit for detecting an abnormal discharge occurring within at least one of a transformer in said power supply device and a section of the power supply circuit from a secondary side output terminal of said transformer to said first electrode and said second electrode, wherein said power supply device is responsive to detection of said abnormal discharge by said abnormal discharge detection circuit for terminating the provision of alternating current high voltage to said electrodes, wherein said abnormal discharge detection circuit is operative for detecting only an abnormal discharge arising from electrical behavior produced from said power supply device without detecting a special abnormal discharge due to at least one of photo, acoustic, thermal or chemical conditions.