Patent ID: 7084561

Claim:
A cathode ray tube with a panel, the panel comprising: an inside surface having a designated curvature; a central portion having a transmission rate of 45–75%; an outside surface being substantially flat with a flatness ratio (F) satisfying a mathematical formula of F = Ro Sd × 1.767 , where Ro denotes a diagonal curvature radius of the outside surface, Sd denotes a diagonal length of an effective surface of the panel, and the flatness ratio (F) of the outside surface is greater than 17; and a thickness at the central portion of the panel (CFT), a thickness of a vertical axis end (Tv), and a thickness of a diagonal end (Td), wherein CFT, Tv, and Td satisfy conditions of 1.4<Td/CFT<2.2 and 0.85<Tv/Td<1.0.