Patent ID: 6255766
Filing Date: 2001-07-03
Classification: H01J

Abstract:
A cathode ray tube comprising:a rectangular panel on which a phosphor screen is formed;a cylindrical neck in which an electron gun is disposed; andfunnel formed contiguous to the panel, wherein the funnel includes a cone part whose interior surface has a circular section at the position contiguous to the neck, and the circular section is deformed from the neck side to the panel side to have a non-circular section having a maximum diameter along a direction other than the horizontal and vertical axis, and distances from a funnel axis to interior surface of the cone part are non-linearly increased or decreased, and the vertical interior surface is convexed to the funnel axis with fulfilling the following condition,0<.DELTA.H/rd<0.16where rd represents a distance from the funnel axis to the interior surface of the funnel in the diagonal direction, and .DELTA.H represents a distance from a vertical line which connects the neighboring two corner points formed at the convexed interior surface to the top of the convexed interior surface.