Fdk Corporation

Akihiro Sudo

Akihiro Fujii

Katsuo Yamada

Nobuaki Ito

Kiyoshi Hironaka

Toru Hirohashi

Kenichiro Suzuki

Variation in inductance and leakage inductance between the secondary windings is reduced thereby making lamp currents uniform and thus preventing the occurrence of uneven brightness. A two-output inverter transformer comprises a bobbin having a primary winding wound around the middle and secondary windings wound on both sides thereof and having a pole-like core inserted into its winding shaft. A rectangle frame-like core is placed to surround the primary and secondary windings such that the pole-like core is opposite the rectangle frame-like core with a gap sheet interposed at either end. Their sizes are set such that L&#x2212;L2 t, where Lis the length of the rectangle frame-like core, Lis the length of the pole-like core, and t is the thickness of the gap sheet, and they are so combined that the pole-like core protrudes evenly from the opposite ends of the rectangle frame-like core.

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Aichi, Japan

Akihiro Sudo