Color cathode ray tube with phosphor strips concave toward vertical center line

Claim 1

A color cathode ray tube comprising a curved screen panel having an inner surface with successive groups of three different elemental color vertical phosphor stripes arranged cyclically therein, election gun means arrayed on a plane perpendicular to said phosphor stripes for generating three electron beams directEd toward said screen for impinging on corresponding ones of said phosphor stripes, a shadow mask interposed between said gun means and said inner panel surface and having substantially the same curvature as said panel, said mask having vertical rows of beam-passable apertures, said apertures being separated from one another along each row by narrow bridge portions, each of said rows of apertures being associated with one of said groups of phosphor stripes and limiting the illumination thereof by said gun means, said phosphor stripes and associated rows of apertures being substantially straight on and near the vertical axis of the tube as viewed in the direction of the central axis of the tube, and the remainder of said phosphor stripes and associated rows of apertures being outwardly curved in the horizontal axis direction on both sides of the Y-axis of the screen, the color stripes and associated rows of apertures becoming increasingly concave toward the axis of the screen with distance from it.