To realize low power consumption by solving the problem that a conventional coil used for a power supply unit such as a PDP (plasma display panel) has the maximum variation of its inductance value (L component) at 20%, and the plasma panel has variation of a capacitance load (C component); and the variations cause influence on minimization of a power loss of the plasma television.
A sheet-like heat conducting resin 10 in which a lead frame 12 having a coil 13 as one part is buried is fixed on a metal plate 11 having one or more holes 15, a ferrite core 14 is inserted into the hole 15 formed on a substantially center of the coil 13, and the ferrite core 14 is rotated to adjust the inductance value (L component). In this way, the power loss of the plasma television can be suppressed.
TSUMURA TETSUYA
NISHIYAMA KIMIHARU
Hiroki Naito
Daisuke Nagano