公开(公告)号：DE3406787A1

公开(公告)日：1984-08-30

申请号：DE3406787

申请日：1984-02-24

Applicant: RCA CORP

Inventor： D AMATO RALPH JAMES ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86 ,  H01J29/07

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.

公开(公告)号：IT1174058B

公开(公告)日：1987-07-01

申请号：IT1962984

申请日：1984-02-15

Applicant: RCA CORP

Inventor： D AMATO RALPH JAMES ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86 ,  H01T

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.

公开(公告)号：BR8400790A

公开(公告)日：1984-10-02

申请号：BR8400790

申请日：1984-02-21

Applicant: RCA CORP

Inventor： AMATO RALPH JAMES D ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86 ,  H01J29/02

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.

公开(公告)号：IT8419629D0

公开(公告)日：1984-02-15

申请号：IT1962984

申请日：1984-02-15

Applicant: RCA CORP

Inventor： AMATO RALPH JAMES D ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86 ,  H01J

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.

公开(公告)号：GB2136199A

公开(公告)日：1984-09-12

申请号：GB8404605

申请日：1984-02-22

Applicant: RCA CORP

Inventor： D AMATO RALPH JAMES ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.

公开(公告)号：FR2541819A1

公开(公告)日：1984-08-31

申请号：FR8402864

申请日：1984-02-24

Applicant: RCA CORP

Inventor： AMATO RALPH JAMES D ,  GODFREY RICHARD HUGH ,  MASTERTON WALTER DAVID ,  MORRELL ALBERT MAXWELL ,  WEBER DONALD LEWIS

IPC: H01J31/20 ,  H01J29/86

Abstract: A cathode-ray tube eg. a shadow mask colour tube, includes a rectangular faceplate which has an exterior surface having curvature along both the minor (Y-Y) and major (X-X) axes wherein at least in the center portion of the faceplate, the curvature along the minor axes is greater than the curvature along the major axis (as shown in Figure 6). In a preferred arrangement the curvature along the minor axis is at least 4/3 greater than the curvature along the major axis. The arrangement provides a substantially rectangular contour near the periphery of the faceplate lying in a plane P thus creating an illusion that a picture produced on the faceplate is flat. The faceplate may be associated with a shadow mask which similarly has greater curvature along its minor axis than along its major axis. Variations in the thickness of the faceplate are also discussed.