Colour display tube including a convergence correction device

A display device having a display tube provided with a display screen and a tube neck located opposite thereto, and including a convergence correction device which comprises an arrangement of correction coils disposed around the neck for producing correction fields, characterized in that the arrangement of correction coils comprises:

• a. an insulating support surrounding the tube neck and having opposite first and second sides and a plurality of metallized aperture extending through said support from the first side to the second side;
• b. a first system of spiral coils formed of first conductors disposed on the first side of the insulating support, at least first and second ones of said coils having respective first and second electrical connection points which are disposed on opposite sides of at least one of said first conductors and are electrically connected to respective adjacent first and second ones of said metallized apertures;
• c. a second system of spiral coils formed of second conductors disposed on the second side of the insulating support, at least one of the coils in the second system being offset with respect to one of the coils in the first system to provide an area on said second side which is separate from said second conductors and includes said first and second metallized apertures;
• and
• d. an interconnecting conductor disposed on the second side of the insulating support in said area for electrically connecting the first and second metallized apertures.