Patent ID: 6570310
Filing Date: 2003-05-27
Classification: H01J

Abstract:
A shadow-mask type color cathode-ray tube comprising:a face panel on which an image is displayed; a funnel connected to said face panel, said funnel and said face panel forming a vacuum container; electron guns for producing electron beams for red, green and blue colors, said guns being horizontally arranged in line; a deflection yoke provided around said funnel, said yoke deflecting said electron beams; a phosphor screen formed on an inner surface of said face panel in said container; said screen having stripes of phosphor materials for red, green and blue colors, said stripes being horizontally arranged in said screen; a shadow mask fixed apart from said face panel and opposed to said phosphor screen in said container; said shadow mask having slots which selectively allow said electron beams to arrive at said phosphor screen through said mask, each of said slots having a vertically elongated shape; said electron beams being scanned perpendicular to said slots; said slots being arranged horizontally at a fixed horizontal pitch with respect to each other; said slots being arranged vertically at a fixed vertical pitch with respect to each other; wherein at least two vertically adjacent ones of said slots each have a bridge area therebetween, said bridge area serving as an electron-beam stopping area; wherein at least two horizontally adjacent ones of said slots are vertically shifted a fixed distance relative to each other, said fixed distance being equal to approximately a half of said vertical pitch; and wherein said vertical pitch of said slots is set at a value ranging from 0.2 mm to 0.5 mm and is defined relative to centers of said slots.