Patent ID: 6628062
Filing Date: 2003-09-30
Classification: H01J

Abstract:
A color CRT (Cathode Ray Tube) panel comprising:an outside surface substantially flat; and an inside surface formed with arc curvatures having a long axis direction radius of curvature Rx and a short axis direction radius of curvature Ry different from each other, wherein the radius Rx is greater than the radius Ry, and wherein Tc+(Ry-Ry2-Lye2)Tcâ€ƒrepresents a ratio of thickness increase of the panel inside surface at the end of an effective panel inside surface to a thickness Tc of the panel inside surface at a center of the panel in a direction of a height axis in the short axis direction Ry, wherein the ratio is within a range of greater than 1.5 and smaller than 2.5, and Ry=Lye2+Zye22Ã—Zye,â€ƒwhere Lye denotes a distance from the center portion of the panel to an end of an effective surface in a short axis direction, and Zye denotes a height at the end of the effective surface in the short axis direction.