Funai Electric Company Ltd.

Sanyo Electric Co., Ltd.

Takahiro Ogawa

Yutaka Ueta

Kiyotaka Ito

Atsushi Inoue

Kazuhiko Koga

Hiroyuki Ohno

Hiroyuki Okuda

Takahito Yamanaka

Kousou Ishihara

Atsushi Furuzawa

Takao Yamano

Yoshifumi Fukumoto

Toshinori Urano

Kazuhiro Koga

Kiyotaka Itou

The IC fixing component includes a locking case accommodating the IC in such a manner that a side of the IC out of a face-to-face contact with the heat dissipation plate is brought into a face-to-face contact with the locking case so as to be covered and a through hole and a rotation stop protrusion inserted into a rotation limiting hole. After the IC has been accommodated in the locking case, the screw member inserted through the through hole is screwed into a screw hole of the heat dissipation plate so that the side of the IC out of face-to-face contact with the locking case is pressed by the locking case thereby to be brought into a face-to-face contact with the heat dissipation plate.

IC fixing structure

At a primary power-supply boarda Vpower supply and a Vpower supply of prescribed voltages are derived and outputted to a plasma display panelSecondary power supplies V, V, and Vare derived from prescribed voltage levels of a transformerfor deriving Vand Vpower supplies at the primary power-supply boardThe secondary power supplies V, V, and Vare outputted to a secondary power-supply boardwhich is a board different from the primary power-supply boardV, V, and Vpower supplies which can be used by the plasma display panelare derived by regulating the secondary power supplies V, V, and V. Thus, since the primary power-supply boardand the secondary power-supply boardare provided separately, the secondary power-supply boardalone can be replaced to cope with the changes of the plasma display panel

Plasma television set

An error detection circuit includes: a Zener diode having a cathode connected through a resistor to a second DC output with a higher voltage than that of a first DC output; a voltage divider circuit; and a PNP transistor having an emitter connected to the first DC output, and a base supplied with an output voltage of the voltage divider circuit. A Zener voltage of the Zener diode and a voltage dividing ratio of the voltage divider circuit are set so that the output voltage of the voltage divider circuit is equal to a value obtained by subtracting the base-emitter voltage of the PNP transistor Qfrom the voltage of the first DC output, and that temperature characteristic of the output voltage of the voltage divider circuit is set at a value canceling temperature characteristic of the PNP transistor.

Video cassette recorder and RCC type switching power supply

A switching power supply to stabilize the voltage of a DC output by controlling the switching of a switching transistor according to a voltage error of the DC output. In the switching power supply, when the switching transistor carries out the intermittent switching, the maximum value of the current flowing through a primary coil is limited to a current value smaller than the maximum value of the current determined corresponding to the output of an error detection circuit.

Switching power supply for stabilizing a DC output voltage

A switching power supply which takes out an output current from a secondary winding when a switching circuit for switching a current flowing through a primary winding is turned off and supplies a DC output to a load device having a control input for decreasing an amount of consumption power thereof. The switching power supply includes a voltage reduction detection circuit for detecting a voltage generated at the secondary winding when the switching circuit is in an on-state and for outputting to the control input a reduction signal representing reduction of an input voltage of the primary winding side when the detected voltage is out of a predetermined range.

Switching power supply with input voltage reduction detection

A magnetic head comprises a first abutting segment formed with a winding groove having an open side, and a second abutting segment opposed to the open side of the groove and joined to the first segment. The first abutting segment comprises a first core segment having the groove, and gap spacers and second ferromagnetic thin films formed on the surface thereof opposed to the second segment and positioned above and below the groove. The first core segment comprises a core segment member made of a ferromagnetic material, formed with the groove and having a first ferromagnetic thin film which is formed on the surface thereof opposed to the second abutting segment and which is positioned toward the face of the head to be opposed to recording media. The second abutting segment has a face to be opposed to the recording medium and formed by a nonmagnetic material.

Magnetic head for magnetic recording and reproduction

A floating type composite magnetic head includes a head core fixed to a slider formed of nonmagnetic material. In the head core, a pair of magnetic core halves are abutted against each other with nonmagnetic material such as SiO.sub.2 or the like interposed therebetween. The first and second magnetic core half members have first and second gap forming surfaces to be abutted against each other to define a magnetic gap (g), respectively. A first groove is formed on the second gap forming surface. A glass layer is formed in the first groove. A first thin film including a ferromagnetic metal thin film is selectively formed on the first gap forming surface. A second thin film including a ferromagnetic metal thin film is selectively formed on the second gap forming surface so that at least a portion except the surface of the glass layer in the second gap forming surface is exposed. A second groove is formed on the exposed second gap forming surface adjacent to the first groove. The first and second magnetic core half members are abutted and bonded with glass so that the first and second gap forming surfaces face each other so that the first and second thin films are abutted with SiO.sub.2 or the like interposed therebetween to define a magnetic gap (g). Causes of occurrence and an increase of false gaps are suppressed and a decrease in manufacturing yield due to separation of thin films or the like can be prevented.

Method of manufacturing floating type magnetic head

A floating-type magnetic head comprising a slider and a core chip secured thereto. The core chip comprises a pair of core segments joined together with a gap spacer and a thin ferromagnetic metal film which are formed at the joint only over a portion of the entire area of the joint which portion terminates at the face of the core chip to be opposed to magnetic recording media. The two core segments area bonded to each other with glass present over the remaining portion of the joint area. In producing the magnetic head, the core chip is prepared by fabricating a core block comprising a pair of base plates joined together and strips of thin ferromagnetic metal film and gap spacer provided at the joint, and machining the core block.

Growing community of inventors

Osaka, Japan

Takahiro Ogawa