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公开(公告)号：IT1176642B
公开(公告)日：1987-08-18
申请号：IT2251084
申请日：1984-09-04
Applicant: RCA CORP
Inventor： D AMATO RALPH JAMES , GODFREY RICHARD HUGH , MORREL ALBERT MAXWELL , RAGLAND JR FRANK ROWLAND
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.
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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
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.
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Patent Agency Ranking
公开(公告)号：FI792715A
公开(公告)日：1980-03-09
申请号：FI792715
申请日：1979-08-31
Applicant: RCA CORP
Inventor： D AMATO RALPH JAMES , STONE ROBERT PORTER
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公开(公告)号：GB2147142B
公开(公告)日：1987-03-25
申请号：GB8422084
申请日：1984-08-31
Applicant: RCA CORP
Inventor： D AMATO RALPH JAMES , GODFREY RICHARD HUGH , MORRELL ALBERT MAXWELL , RAGLAND FRANK ROWLAND
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.
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公开(公告)号：IT1122937B
公开(公告)日：1986-04-30
申请号：IT2542579
申请日：1979-08-31
Applicant: RCA CORP
Inventor： D AMATO RALPH JAMES , NOLAN RICHARD ADDISON
Abstract: The present invention provides an improvement in an apertured mask type color picture tube having a faceplate, a cathodoluminescent screen on the faceplate, a corrugated apertured mask adjacent the screen and an electron gun means for producing and directing a plurality of electron beams through the mask to impinge upon the screen. The mask is constructed by first forming the apertures therein and thereafter forming the mask in a corrugated shape. Aperture width in the apertured but unformed mask is adjusted to compensate for stretching and compression of the mask occurring during formation of the mask into a corrugated shape. Therefore, the corrugated mask is substantially free of aperture width variation from that desired caused by forming the mask in a corrugated shape.
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公开(公告)号：GB2147142A
公开(公告)日：1985-05-01
申请号：GB8422084
申请日：1984-08-31
Applicant: RCA CORP
Inventor： D AMATO RALPH JAMES , GODFREY RICHARD HUGH , MORRELL ALBERT MAXWELL , RAGLAND FRANK ROWLAND
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.
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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
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.
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