| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laminated coil unit capable of increasing a coil Q value by increasing inductance L that is a coil characteristic and decreasing resistance R, to provide an electronic apparatus using the laminated coil unit, and to provide a charger. <P>SOLUTION: The laminated coil unit is used for at least one of primary- and secondary-side coils for contactless power transmission. The unit has N (N is an even number of not less than 4) plane air cores 40A-40D, and each of N plane air cores is composed of a spiral conductive pattern formed on an insulating board and is laminated in the thickness direction of the insulating board. N/2 sets of coil connection units 80, 82, where respective two plane air cores 40A, 40B and 40C, 40D in the N air cores are connected in a first connection form (for example, parallel) that is either parallel or series, are connected in a second connection form (for example, series) that is the other of parallel and series. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
