Patent ID: 6531812
Filing Date: 2003-03-11
Classification: H01J

Abstract:
A shadow mask for a flat cathode ray tube having a panel glass with fluorescent materials spread on the inner surface thereof, a funnel glass fixed on the rear portion of said panel glass and having a neck portion as an integral body therewith to which an electron gun emitting electron beams to the fluorescent materials side is sealed, a deflection yoke formed on the outer peripheral surface of the neck portion and for deflecting the electron beams emitted from said electron gun, and said shadow mask fixed on the inner surface of said panel glass, having a color discrimination function and forming a plurality of slot type apertures on the surface thereof, characterized in that the relation between the vertical pitch of said apertures on said shadow mask and the vertical pitch of the electron beams scanned on a screen is in the range of 0.053&lE;s/a&lE;0.438.