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公开(公告)号：IT8619646D0
公开(公告)日：1986-03-06
申请号：IT1964686
申请日：1986-03-06
Applicant: RCA CORP
Inventor： MORRELL ALBERT WAXWELL , MASTERTON WALTER DAVID
Abstract: An improvement is made in a color picture tube having a substantially rectangular slit-aperture type shadow mask mounted therein in spaced relation to a substantially rectangular cathodoluminescent line screen. In the specific improvement, the cathodoluminescent lines of said screen, in front plan view, first increase in curvature with an increase in distance from the minor axis of the screen and then decrease in curvature with further increase in distance from the minor axis, to become substantially straight at the short sides of the screen.
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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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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
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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公开(公告)号：GB2175132B
公开(公告)日：1989-06-21
申请号：GB8605930
申请日：1986-03-11
Applicant: RCA CORP
Inventor： MASTERTON WALTER DAVID
IPC: H01J29/07
Abstract: In a color picture tube (10) having a substantially rectangular slit-aperture type shadow mask (24) mounted therein in spaced relation to a substantially rectangular cathodoluminescent line screen (22), the spacing, AH, Fig. 6, between adjacent aperture columns near the minor axis (Y-Y) of the mask is less at the long sides of the mask than near the major axis (X-X) of the mask, as shown by "H"-1 to "H"-100 representing aperture columns 1-100 numbering from the mask centre outwards. Moreover the aperture column-to-column spacing may be greater near the corners of the mask than near the major axis - see "H"-300 and "H"-305. Preferably also the aperture column-to-column spacing along the major axis varies as a function of the fourth power of distance from the minor axis, and off the major axis, but parallel thereto, varies in accordance with A = a + bx + cx where a, b, and c are different functions of the square of the distance from the major axis, and x is the distance from the minor axis.
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公开(公告)号：GB2199181B
公开(公告)日：1989-01-18
申请号：GB8801566
申请日：1988-01-25
Applicant: RCA CORP
Inventor： MASTERTON WALTER DAVID
IPC: H01J29/07
Abstract: An improvement is made in a color picture tube having a slit-type shadow mounted therein in spaced relation to a cathodoluminescent line screen. For the mask, the spacing between adjacent aperture columns increases from center-to-edge as approximately the fourth power of the distance along from the center. Such fourth order spacing variation permits shaping of the shadow mask so that the contour of the mask along its major axis also varies as a function substantially of the fourth power of distance along from the center of the mask.
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Patent Agency Ranking
公开(公告)号：IT1184506B
公开(公告)日：1987-10-28
申请号：IT2052485
申请日：1985-04-29
Applicant: RCA CORP
Inventor： MASTERTON WALTER DAVID
Abstract: An improvement is made in a color picture tube having a slit-type shadow mounted therein in spaced relation to a cathodoluminescent line screen. For the mask, the spacing between adjacent aperture columns increases from center-to-edge as approximately the fourth power of the distance along from the center. Such fourth order spacing variation permits shaping of the shadow mask so that the contour of the mask along its major axis also varies as a function substantially of the fourth power of distance along from the center of the mask.
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公开(公告)号：IT1183585B
公开(公告)日：1987-10-22
申请号：IT2062985
申请日：1985-05-09
Applicant: RCA CORP
Inventor： MASTERTON WALTER DAVID , GOOD ANDREW
Abstract: The present invention provides an improvement in color picture tubes having slit type apertured shadow masks wherein the aperture throats are arranged in columns, and the apertures within each column are separated by webs. The improvement comprises the aperture throat columns passing through a center portion of the mask being substantially straight, and the aperture throat columns on both sides of the center portion of the mask being convexly curved toward the center portion and increasing in curvature with distance from the center portion.
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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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公开(公告)号：FR2592218A1
公开(公告)日：1987-06-26
申请号：FR8617690
申请日：1986-12-17
Applicant: RCA CORP
Inventor： MORREL ALBERT MAXWELL , MASTERTON WALTER DAVID , BAUDER RICHARD CLARK
Abstract: The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. Such method further comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. The improvement comprises moving both the faceplate panel and the cylindrical shaped lens in synchronization in a direction parallel to the line light source during the exposing step.
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公开(公告)号：BR8601066A
公开(公告)日：1986-11-25
申请号：BR8601066
申请日：1986-03-12
Applicant: RCA CORP
Inventor： MASTERTON WALTER DAVID
Abstract: In a color picture tube (10) having a substantially rectangular slit-aperture type shadow mask (24) mounted therein in spaced relation to a substantially rectangular cathodoluminescent line screen (22), the spacing, AH, Fig. 6, between adjacent aperture columns near the minor axis (Y-Y) of the mask is less at the long sides of the mask than near the major axis (X-X) of the mask, as shown by "H"-1 to "H"-100 representing aperture columns 1-100 numbering from the mask centre outwards. Moreover the aperture column-to-column spacing may be greater near the corners of the mask than near the major axis - see "H"-300 and "H"-305. Preferably also the aperture column-to-column spacing along the major axis varies as a function of the fourth power of distance from the minor axis, and off the major axis, but parallel thereto, varies in accordance with A = a + bx + cx where a, b, and c are different functions of the square of the distance from the major axis, and x is the distance from the minor axis.
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