Abstract: A bobbin includes a core portion extending in a z-axis direction, a flange portion at an end of the core portion on a negative direction side of the z-axis direction and extending from the core portion in an x-axis direction and a y-axis direction, and a projecting portion projecting toward the negative direction side of the z-axis direction from a surface S1 on the negative direction side of the flange portion in the z-axis direction. Pin terminals project from the surface S1 of the flange portion toward the negative direction side of the z-axis direction. A winding is wrapped around the core portion, with both ends respectively wrapped around the pin terminals. Both ends of the winding are respectively soldered to the pin terminals at a region between an end portion of the projecting portion on the negative direction side of the z-axis direction and the surface S1 of the flange portion.

Abstract: A bobbin includes a core portion extending in a z-axis direction, a flange portion at an end of the core portion on a negative direction side of the z-axis direction and extending from the core portion in an x-axis direction and a y-axis direction, and a projecting portion projecting toward the negative direction side of the z-axis direction from a surface S1 on the negative direction side of the flange portion in the z-axis direction. Pin terminals project from the surface S1 of the flange portion toward the negative direction side of the z-axis direction. A winding is wrapped around the core portion, with both ends respectively wrapped around the pin terminals. Both ends of the winding are respectively soldered to the pin terminals at a region between an end portion of the projecting portion on the negative direction side of the z-axis direction and the surface S1 of the flange portion.

Abstract: In a backlight, for example, a pair of U-shaped discharge tubes are connected to connectors of a discharge tube lighting circuit. A secondary output voltage of a first transformer is applied to a first end of one U-shaped discharge tube via a power supply electrode. A secondary output voltage of a second transformer is applied to a first end of the other U-shaped discharge tube via a power supply electrode. A secondary output voltage of a third transformer is applied in common to the other (second) ends of the U-shaped discharge tubes via other power supply electrodes. The secondary output voltages of the first and second transformers are the same in polarity, and are opposite to the secondary output voltage of the third transformer in polarity.

Abstract: In a backlight, for example, a pair of U-shaped discharge tubes are connected to connectors of a discharge tube lighting circuit. A secondary output voltage of a first transformer is applied to a first end of one U-shaped discharge tube via a power supply electrode. A secondary output voltage of a second transformer is applied to a first end of the other U-shaped discharge tube via a power supply electrode. A secondary output voltage of a third transformer is applied in common to the other (second) ends of the U-shaped discharge tubes via other power supply electrodes. The secondary output voltages of the first and second transformers are the same in polarity, and are opposite to the secondary output voltage of the third transformer in polarity.

Abstract: An auto-tracking system for a helical scan type magnetic recording/reproducing unit comprises a synchronizing signal separating circuit from video signals on a running magnetic tape reproduced by a rotary video head, a periodicity variation measuring and comparing circuit in the synchronizing signals separated in the synchronizing signal separating circuit, and a tracking control means which controls the running condition of the magnetic tape with reference to a phase difference between a reference signal in association with the rotary video head and a signal representing the running condition of the magnetic tape and changes tracking by a predetermined amount in response to the periodicity variation measured by the measuring and comparing circuit so as to minimize the periodicity variation measured by the same, thereby an optimum tracking position is obtained without being interfered by cross-talks between the adjacent tracks.