公开(公告)号：MX157877A

公开(公告)日：1988-12-19

申请号：MX20262284

申请日：1984-09-05

Applicant: RCA CORP

Inventor： AMATO RALPH JAMES D ,  GODFREY RICHARD BUGH ,  MORRELL ALBERT MAXWELL ,  RAGLAND FRANK ROWLAND JR

IPC: H01J29/86 ,  H04N5/64

Abstract: Improvement is provided in the appearance of a color picture type cathode-ray tube including rectangular faceplate with an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes. At least in the center portion of the faceplate, the curvature along the minor axis is at least 10 percent greater than the curvature along the major axis. Points on the exterior surface near the ends of the major axis, at the edges of the screen, lie in a first plane (P1) perpendicular to the central axis (Z-Z) of the tube; points on the exterior surface near the ends of the minor axis, at the edges of the screen, lie in a second plane (P2) which is spaced from and parallel to the first plane; and points on the exterior surface near the ends of the diagonals of the rectangular faceplate, at the edges of the screen, lie in a third plane (P3) which is spaced from and parallel to the first plane. The three planes are spaced from the center portion of the faceplate in the order of second plane, first plane and third plane. Further relative dimensions are detailed.