Abstract: Cathode-ray tube comprising a glass envelope composed of a substantially rectangular faceplate, of a flared rear part and of a substantially cylindrical neck, the flared part including an anode button for receiving the high voltage, the outer surface of the said flared part being partially covered by an electrically conducting layer, adhering to the said outer surface, the electrically conducting layer being a metallic layer composed mainly of aluminium. This layer makes it possible to improve the image distortions due to the drop in the high voltage during current spikes delivered by the high voltage.

Abstract: Cathode-ray tube comprising a glass envelope composed of a substantially rectangular faceplate, of a flared rear part and of a substantially cylindrical neck, the flared part including an anode button for receiving the high voltage, the outer surface of the said flared part being partially covered by an electrically conducting layer, adhering to the said outer surface, the electrically conducting layer being a metallic layer composed mainly of aluminium. This layer makes it possible to improve the image distortions due to the drop in the high voltage during current spikes delivered by the high voltage.

Abstract: Deflection system for a cathode-ray tube comprising a pair of vertical deflection coils and a pair of horizontal deflection coils, the two pairs being electrically insulated by a separator. The system also comprises auxiliary coils modulating the horizontal scan velocity. The support 9 for the auxiliary coils, made of plastic, comprises openings 32 placed under the location 30 of the said auxiliary coils so as to decrease the relative permittivity of the space between these coils and the neck of the tube, which tends to decrease the occurrence of electric arcs in the neck of the tube when switching it on.