PROJECTION TUBE DEVICE

PROBLEM TO BE SOLVED: To correct pincushion distortion at the top and the bottom of a screen without adding a new component. SOLUTION: In the projection tube device, a secondary coefficient H2 of a polynomial approximate expression expressing a variation curve along the deflection direction of magne...

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Bibliographische Detailangaben
1. Verfasser:	YOSHINAGA TAKAHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To correct pincushion distortion at the top and the bottom of a screen without adding a new component. SOLUTION: In the projection tube device, a secondary coefficient H2 of a polynomial approximate expression expressing a variation curve along the deflection direction of magnetic flux density in a cross-section orthogonal to the center axis (Z axis) of a horizontal coil in a horizontal deflection magnetic field generated by the horizontal coil changes in order of positive, negative, positive, and negative from a panel side toward an electron gun side along the center axis. COPYRIGHT: (C)2006,JPO&NCIPI