Inner shield for slim cathode ray tubes

An inner shield for slim cathode ray tubes, wherein

• on the assumption that the linear distance from an electron beam deflection center of a tube part to the plane formed by a seal edge of a panel is L, and the height of the inner shield is Sh, the inner shield is constructed such that the following inequality is satisfied:
• 2<L/Sh<3.5,
• on the assumption that the length of the major axis of an opening at the electron beam entrance side of the inner shield is Dx, and the length of the minor axis of the opening at the electron beam entrance side of the inner shield is Dy, the inner shield is constructed such that the following inequalities are satisfied:
• 1.6<Dx/L<3.5 and 1.0<Dy/L<2.5,
• the inner shield has a wide-angle deflection of 120 degrees or more, and
• on the assumption that the area of a large opening at the panel side is α, and the area of a small opening at the electron gun side is β, the ratio in area of the large opening to the small opening is set such that the following inequality is satisfied:
• 5.5>α/β>5.0.