Matsushita Electronics Corporation

Toshio Ose

Koji Shimada

Akitsugu Ishii

Katsuyo Iwasaki

Masanobu Honda

Toshifumi Yoshida

A deflection yoke for a cathode ray tube can correct both the pincushion distortion at the upper and lower edges of the screen and the misconvergence of the screen at the same time by the deflection yoke itself without the need for a correction magnet. The deflection yoke comprises a saddle shaped horizontal deflection coil, a saddle shaped vertical deflection coil located outside the horizontal deflection coil, and a high permeability core located outside the vertical deflection coil. The core has notch portions at the center parts of the upper and lower portions of the screen side end.

Deflection yoke and color cathode ray tube with deflection yoke

Deflection yoke with a core having a higher magnetic reluctance at the

A cathode ray tube display which can reduce the temperature rise of its deflection yoke, not by using either extra-fine wires or litz wires but by increasing the heat radiation of its saddle-type coils, is provided. A deflection yoke arranged in the rear periphery of a cathode ray tube display main body includes a saddle-type horizontal deflection coil, an insulating frame located outside of the saddle-type horizontal deflection coil, a saddle-type vertical deflection coil and a ferrite core located outside the insulating frame. The surface of the saddle-type horizontal deflection coil is partially exposed from the screen-side end face of the ferrite core toward the screen, and the surface area of the exposed part is predetermined to be from 100 to 298 cm.sup.2. Similarly, the exposed surface area of the saddle-type vertical deflection coil is predetermined to be from 55 to 185 cm.sup.2.

Cathode ray tube displays having saddle-type deflecting coils

A deflection yoke for color cathode ray tubes, the deflection yoke including a vertical deflection coil for generating a vertical deflecting magnetic field having a barrel-shaped distortion, and a horizontal deflection coil for generating a horizontal deflection magnetic field having a pin-cushion shaped distortion, a differential coil connected to the horizontal deflection coil, a pair of cores located in opposite positions at a smaller rim portion of the yoke, the cores being provided with coils for generating a quadripolar magnetic field, a pick-up coil magnetically coupled to the differential coil or the horizontal deflection coil, and a current waveform shaping circuit for supplying a current to the quadripolar magnetic field generating coils.

Growing community of inventors

Osaka, Japan

Toshio Ose