Abstract: The stringent requirements regarding convergence (in color display tubes) and spot quality in monochrome display tubes are met by deflection units which produce dynamic multi-pole fields which are strongly modulated. Static multipole fields, which have a dynamic component when an electron beam passes therethrough, are used in cathode ray tube-deflection unit combinations to simulate, a strong modulation of the dynamic multipole deflection fields. In one combination, the production of a negative static eightpole field in the center of the deflection area improves spot quality.

Abstract: A method of composing self-converging deflection units for color display tubes of the in-line type having the same deflection angles and neck diameters but different screen formats, in which for all screen formats one and the same design of the deflection unit is used, which deflection unit is self-converging for a color display tube of a given screen format and is made self-converging for a color display tube of a different screen format by varying the effective lengths of the line and field deflection coils constructed as saddle-shaped coils of the shell type in opposite senses with the position of their front ends remaining the same.

Abstract: In a deflection unit for in-line color television display tubes, flux altering elements are provided between the field and line deflection coils, near the center of the field deflection coil, the flux altering means extending substantially parallel to the field deflection field. As a result of these measures, such a deflection unit combines a good astigmatism level with an acceptably small frame coma error and a reduced EW-frame distortion.

Abstract: A deflection unit for in-line color television display tubes having a line deflection coil and a field deflection coil, the field deflection winding having a slightly pronounced barrel-shaped field deflection field in the middle and on the screen side of the deflection unit and being combined with field-forming means (in particular soft-magnetic segments which are placed between the line and field deflection coils) to generate a pronounced pin-cushion-shaped field on the gun side of the deflection unit. As a result of these measures, the deflection unit couples a coma-free field deflection field with a minimum EW-field distortion.

Abstract: A deflection unit for a color television display tube 1 having a field deflection coil 8 and a line deflection coil 7, in which the line deflection coil is formed by two diametrically oppositely positioned coil portions which, on the side adjacent the tube's screen, have a flared end 17 having a profile with a path length 22 which is longer than the path length 23 of the contour of the outer surface of the tube, so that raster defects are smaller than when the profile of the flared ends conforms to the contour of the tube surface.

Abstract: A deflection unit for use in a color cathode-ray tube of the in-line type and having a line and a frame deflection winding, which deflection unit can be made to be self-converging for cathode-ray tubes of the same series having different screen formats by moving the line and frame deflection windings with respect to each other.

Abstract: A deflection coil unit for color television, comprising coils which are toroidally wound on a ring core having a flared inner surface. The parts of the coils which extends along the inner surface are situated in grooves having side walls whose plane is parallel to the axis of the ring core.