Projektionslampe und Verfahren zur Regulierung ihrer Helligkeit

• Main Authors: KUSHIDA, HIROYUKI, OKAMOTO, MASASHI, ASAHINA, TAKASHI
• Format: Patent
• Language: German
• Published: 22.01.2009
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

A dielectric barrier discharge lamp light source device having discharge space (3) filled with discharge gas that emits light through dielectric barrier discharge, said device provided with a dielectric barrier discharge lamp (1) having a structure in which dielectrics (7,8) are interposed between at least one of two electrodes (5,6) to induce a discharge phenomenon in said discharge gas and a power supply device (9) to provide alternating current high voltage to said electrodes (5,6) of said dielectric barrier discharge lamp (1), wherein said power supply device (9) has abnormal discharge detection circuit (14) to detect abnormal discharge occurring within transformers (81 or 114) in said power supply device (9) or in the section from the secondary side output terminal of a transformer to said electrodes (5,6), said power supply device (9) halting the supply of alternating current high voltage from said power supply device (9) to said dielectric barrier discharge lamp (1) when said abnormal discharge detection circuit (14) detects abnormal discharge, and said abnormal discharge detection circuit (14) characterized by having the ability to detect only abnormal discharge arising from electrical behavior of said power supply device (9) without being a detector of special abnormal discharge due to photo-, acoustic-, thermal- or chemical matter.