| 摘要 |
A light source unit for use in, for example, a backlight for illuminating a display panel of a liquid crystal display apparatus, includes a cold-cathode tube having discharge electrodes provided one in each end portion of a glass tube whose interior is filled with a discharge gas. A coil as an inductance element is connected to at least one of the discharge electrodes of the cold-cathode tube so as to eliminate the difficulty in handling a cold-cathode tube caused by its having a negative characteristic such that, as the current flowing therethrough increases, the resistance across it decreases, causing the cold cathode-tube to succumb to current runaway.
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