Abstract: For a substrate of a coil component, there are arranged a plurality of through-holes; the pattern-wiring is provided with a loop-shaped portion surrounding the circumference of a center hole which penetrates the substrate a pair of end portions which extend from that loop-shaped portion; and the neighboring two through-holes within the plurality of through-holes penetrate the substrate in a state that at least a part of each of the openings thereof superimpose each of the pair of end portions and is connected electrically with each of the end portions. In addition, the opening of one of the through-holes at one of the end portions within the pair of end portions is provided at a biased position close to the other of the end portions with respect to the center of the one of the end portions in the intersecting-direction.

Abstract: For a substrate of a coil component, there are arranged a plurality of through-holes; the pattern-wiring is provided with a loop-shaped portion surrounding the circumference of a center hole which penetrates the substrate a pair of end portions which extend from that loop-shaped portion; and the neighboring two through-holes within the plurality of through-holes penetrate the substrate in a state that at least a part of each of the openings thereof superimpose each of the pair of end portions and is connected electrically with each of the end portions. In addition, the opening of one of the through-holes at one of the end portions within the pair of end portions is provided at a biased position close to the other of the end portions with respect to the center of the one of the end portions in the intersecting-direction.

Abstract: A transformer-type compact and thin coil device having a high coupling degree between a primary coil and a secondary coil, and a transformer device in which a plurality of sets of the transformer-type coil devices are incorporated. A coil device includes a first winding portion in which a primary and secondary coil wires are wound in bifilar form so as to arrange them alternately in a plane, a second winding portion in which a secondary coil wire is wound to arrange it in a plane parallel to the plane of the first winding portion, and a secondary coil connecting portion which connects an inner diameter portions of the secondary coil wires of the first and second winding portions. A transformer device is formed by incorporating a plurality of sets of the transformer-type coil devices each formed in above manner.

Abstract: A transformer-type compact and thin coil device having a high coupling degree between a primary coil and a secondary coil, and a transformer device in which a plurality of sets of the transformer-type coil devices are incorporated. A coil device includes a first winding portion in which a primary and secondary coil wires are wound in bifilar form so as to arrange them alternately in a plane, a second winding portion in which a secondary coil wire is wound to arrange it in a plane parallel to the plane of the first winding portion, and a secondary coil connecting portion which connects an inner diameter portions of the secondary coil wires of the first and second winding portions. A transformer device is formed by incorporating a plurality of sets of the transformer-type coil devices each formed in above manner.

Abstract: This high-voltage transformer can regulate the leakage inductance accurately and easily. Winding frames of a primary-side winding (6), a secondary-side winding (7), and a magnetic-coupling adjusting winding (8) are provided so that the primary-side winding (6), the secondary-side winding (7), and magnetic-coupling adjusting winding (8) are placed in a common magnetic path. A part of either the primary-side winding (6) or the secondary-side winding (7) is wound around the frame of the magnetic-coupling adjusting winding (8). The frames of the primary-side winding (6) and the secondary-side winding (7) can be formed into a common frame, and the primary-side winding (6) and the secondary-side winding (7) can be wound superimposedly around the common winding frame. The frames of the primary-side winding (6) and the secondary-side winding (7) can be so provided on both sides of the frame of the magnetic-coupling adjusting winding (8) as to sandwich the frame of the magnetic-coupling adjusting winding (8).

Abstract: A high voltage discharge lamp lighting apparatus, wherein a high voltage required to light a high voltage discharge lamp can be obtained with the size of the whole apparatus reduced. A rectifier circuit (6), which is disposed on the secondary side of a transformer having a primary winding (3), a secondary winding (4) and a core (5) to receive a secondary side voltage, has a forward function and a flyback function. A voltage-doubler circuit (7) adds an output voltage generated by the rectifier circuit (6) to the secondary side voltage. Inclusion of the rectifier circuit (6) and voltage-doubler circuit (7) can efficiently boost the secondary voltage. Additionally, an inverter circuit (8) and a booster circuit (9) are disposed in a stage following the voltage-doubler circuit (7).

Abstract: A high-voltage discharge lamp operating device capable of reducing the size and the weight of a DC-DC converter circuit, and accordingly of the operating device without generating any magnetic saturation of a transformer core part even when igniting a lamp in the operating device for operating a HID head lamp for a vehicle.

Abstract: A high-voltage discharge lamp operating device capable of reducing the size and the weight of a DC-DC converter circuit, and accordingly of the operating device without generating any magnetic saturation of a transformer core part even when igniting a lamp in the operating device for operating a HID head lamp for a vehicle.