• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A cathode-ray tube includes a rectangular faceplate which has an exterior surface having curvature along both the minor and major axes. The exterior surface of the faceplate includes a rectangular contour near its periphery which substantially lies in a plane which is perpendicular to the central longitudinal axis of the tube.
    公开号:SU1403997A3
    申请号:SU843707439
    申请日:1984-02-24
    公开日:1988-06-15
    发明作者:Роуланд Рэгланд Фрэнк (Младший)
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to electronic engineering, in particular to cathode ray tubes (CRT) of a color image.
    The purpose of the invention is to improve the image quality.
    1 shows a schematic representation of a CRT, an axial section; figure 2 - panel, front glass CRT, front view; on fig.Z - section aa in figure 2; figure 4 - section bb in figure 2; on - section bb In figure 2; Fig. 6 shows the contours of the external surfaces of the front glass panel in the sections of Figs 3.4 and 5; and the contours of the external surfaces of the front glass panel of another embodiment of the tube.
    CRT G consists of a glass balloon 2 containing a front glass 3 and a cylindrical mouth 4 connected to a funnel-shaped element 5. The front glass 3 contains a rectangular screen 6, on the inner surface of which a layer 7 of phosphor is applied, and an external flange, or side walls 8, which are hermetically connected to the funnel-shaped element 5 by means of an adhesion glass of 9. hours. Preferably, the fluorescent screen should be: linear, i.e. with phosphor lines that are actually parallel to the smaller axis of the tube (perpendicular to the plane of Fig. 1). The screen can be made dotted. A multiperturbed color sampling electrode, or a shadow mask 10 is movably mounted inside the front glass panel 3 in a predetermined spatial position in relation to the screen layer 7. Inside the neck 4, a planar electron gun 11 is located in the central part to create and direct three electrons. 12 beams along coplanar convergent paths through mask 10 to layer 7. An electron gun can have a triangular or delta configuration.
    The contour of the front glass 3 forms a rectangle with slightly curved sides (FIG. 2). Line 7 (dashed lines) is a rectangle.
    The peculiarity of the contours along the Y – Y axis, which is greater than the X – X axis and the diagonal, is shown in FIGS. 3, 4 and 5, respectively, and the comparison of the relative j contours of the outer surface of the rectangular screen 6 in smaller axes, the larger axis, and the diagonal is shown in FIG. The outer surface of the screen 6 has a curvature of both at least and a larger axis, and the curvature of the at least axis is greater than the curvature of the major axis at least in the center portion of the screen 6. The curvature of the surface diagonally is chosen so as to even out the transition between different curvatures mi along the lesser and major axes. Preferably, the curvature along the lesser axis is at least 4/3 times the curvature along the major axis in the central part of the screen. The contour along the diagonal has at least one sign of the change in its second deflection when moving along the front glass from the center to the corner, as shown in Figs. 3 and 6.
    Due to the difference in the curvatures along the major and minor axes and the diagonal, the height A of the walls 8 of the hollow cylinder can be made postozGnnnu on the periphery of the screen 6, as shown in Fig.3-3. To achieve this constant height of the hollow cup, it is necessary to correctly align the contour of the front glass 3 between the edges of the screen and the hollow cylinder. If such an alignment is difficult, the height of the hollow cylinder varies slightly along the periphery of the tube in the form of irregularities, i.e. slightly larger diagonally with respect to the curvature at the ends of the smaller and larger axes.
    Due to the difference in curvature along the smaller and larger axes, the points on the outer surface of the screen 6, opposite edges of the layer 7, lie in the same plane P. These actually planar points, as shown in Fig. 2, form a contour line on the outer surface of the screen, which , in turn, forms a rectangle superimposed on the edge of layer 7. Therefore, when tube 1 is placed in a television receiver, a frame or window with a border of the same width can be used near it. The edges of such a window, which are in contact with the tube along the line of the rectangular contour, are also in the plane of P. Since the boundary of the image contour on the screen of the tube is planar, a representation appears that the image is flat,
    The fact that the front glass panel has a curvature of both at least and at most axes.
    In one embodiment of the tube, the front glass panel is formed from two smoothly connected cylindrical surfaces, the axes of which are perpendicular. The radii of the two cylindrical surfaces are chosen in such a way that when the two surfaces form an xatyl in the center of the panel, there is a plane perpendicular to the Z axis that intersects the surfaces and forms a right angle when crossing with it. To determine the geometrical parameters of the surface contour of the screen along the smaller and larger axes, the following equality can be applied;
    RTl / 2. | 4R, -lJ R -1/2 4Rt-l | , where RI is the radius of curvature along the major axis; R is the radius of curvature along the minor axis;
    1, is the chord screen length along the larger direction of the axis; 1 is the chord screen length along the smaller axis direction.
    The actual contour of the screen is described by segments of circles parallel to the XZ plane and have radii varying from one magnitude on the X-X axis to a relatively large value at the ends of the smaller axis, and segments of circles parallel to the YZ plane and having radii varying from another magnitude YY axis to relatively large size. at the ends of the major axis. The radius on the smaller axis is shorter than the radius on the major axis, as a result of which the curvature along the minor axis is greater than the curvature along the major axis.
    The radii of the circular segments at the ends of the larger and smaller axes are significantly larger, such that when the screen is at a normal distance from the viewer, the front glass portions at the edges of the screen appear as straight lines. Such radii may be infinite, due to which the edge of the panel contour is indeed flat or very long, as a result of which the sides

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    contour of the outer surface, This is about pro-; this is due to the fact that in order to optimize the strength / weight ratio of the front glass, the thickness of the front glass must be increased by a certain amount of thickening, as shown in Fig. 5. Consequently, the thickness of the screen 6 increases from the center to its edges. In most cases, thickening by a large amount occurs along the smaller Y-Y axis than r thickening along the larger X-X axis. The magnitude of the required bulge changes with tube size and other design features. Typically, the required thickening is about 1-3 mm.
    Alternatively, the front glass panel is thicker at the corners than
     at the ends of its greater or lesser axis. In the embodiment of the CRT shown in FIG. 7, the curvature along the minor axis is the same as in the embodiment of FIG. 6. but
    25, the curvature along the major axis is much smaller in the central portion of the screen and increases near its edges. In this embodiment, the curvature along the major axis near the edges of the screen is higher
    30 normal curvature along the lesser axis. The central part of the rectangular screen 4 becomes smoother as the points of the outer surface are frontal; of the glass on the edges of the screen actually remain in the plane P and determine
    35
    rectangular contour, as in the variant described above.
    权利要求:
    Claims (1)
    [1]
    The invention includes a cathode ray tube comprising a rectangular glass screen comprising an inner surface with a diominophore layer and an outer surface with different curvature along the ma-46 and large axes, as well as a rectangular contour located on the periphery of the screen and lying a plane perpendicular to the central longitudinal axis of the cathode ray tube, with at least in the central part of the screen the curvature along the minor axis is greater than the curvature along the major. axes, and the curvature of the lines of intersection of section planes parallel to the small
    50
    the boundaries of the contour are slightly different from the gg or the major axis, from the outer surface, but actually looking at the screen. As the screen moves away, they disappear as flat. From the center of the screen to the periphery, the contour of the inner surface is equivalent to that. Since wound 6 is slightly different from the goal of improving image quality.
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    by creating an illusion of a plane along the major axis near the screen screen borders, the curvature of the outer surface exceeds the curvature in the center.
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    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3406784C2|1989-12-14|
    MX154440A|1987-08-21|
    DD212840A5|1984-08-22|
    GB8404604D0|1984-03-28|
    KR840008085A|1984-12-12|
    FR2541820B1|1987-04-03|
    IT1174057B|1987-07-01|
    CS269956B2|1990-05-14|
    PL246358A1|1984-10-22|
    HK22993A|1993-03-26|
    JPS59163738A|1984-09-14|
    GB2136198B|1987-03-04|
    PL147579B1|1989-06-30|
    DE3406784A1|1984-08-30|
    US4786840A|1988-11-22|
    GB2136198A|1984-09-12|
    KR910002761B1|1991-05-04|
    IT8419628D0|1984-02-15|
    JPH0439178B2|1992-06-26|
    FR2541820A1|1984-08-31|
    CS111984A2|1989-10-13|
    BR8400833A|1984-10-02|
    CA1199359A|1986-01-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US27259A|1860-02-21|Improvement in tanning |
    US1750661A|1928-03-22|1930-03-18|American Telephone & Telegraph|Cathode-ray oscillograph|
    GB720541A|1951-08-18|1954-12-22|Emi Ltd|Improvements relating to cathode ray tubes|
    US2728012A|1952-08-30|1955-12-20|Rca Corp|Cathode ray tube|
    GB1130206A|1964-11-05|1968-10-09|Rca Corp|Cathode ray tube and method of making same|
    FR1452018A|1965-03-04|1966-02-25|Loing Verreries|Development of bulbs for cathode-ray tubes, in particular for television tubes|
    GB1358161A|1970-06-11|1974-06-26|Pilkington Brothers Ltd|Cathode ray tubes|
    US4136300A|1975-03-19|1979-01-23|Rca Corporation|Cathode ray tube having improved shadow mask|
    JPS52114654U|1976-02-27|1977-08-31|
    JPS5857858B2|1976-09-13|1983-12-22|Tokyo Shibaura Electric Co|
    JPS5528270A|1978-08-19|1980-02-28|Mitsubishi Electric Corp|Picture tube|
    JPS5528269A|1978-08-19|1980-02-28|Mitsubishi Electric Corp|Picture tube|
    SU868882A1|1978-09-29|1981-09-30|Предприятие П/Я Г-4219|Cathode-ray device bulb|
    JPS55139748A|1979-04-18|1980-10-31|Nec Corp|Cathode-ray tube|
    JPH0373981B2|1982-12-13|1991-11-25|NL8304181A|1983-12-06|1985-07-01|Philips Nv|COLOR IMAGE TUBE.|
    NL8304180A|1983-12-06|1985-07-01|Philips Nv|IMAGE TUBE AND IMAGE DISPLAY EQUIPMENT PROVIDED WITH SUCH AN IMAGE TUBE.|
    JPH0666135B2|1983-12-23|1994-08-24|株式会社日立製作所|Shadow mask type color cathode ray tube|
    US4583022A|1984-05-31|1986-04-15|Rca Corporation|Color picture tube having shadow mask with specific curvature and column aperture spacing|
    US4615205A|1984-06-18|1986-10-07|Rca Corporation|Forming a shadow mask from a flat blank|
    JPH0644457B2|1986-01-30|1994-06-08|松下電子工業株式会社|Color picture tube|
    FR2611982B1|1987-02-24|1989-05-26|Videocolor|DEVICE FOR CORRECTING NORTH-SOUTH GEOMETRIC DEFORMATIONS OF A CATHODE RAY TUBE, PARTICULARLY AN ASPHERICAL TUBE|
    KR900004820B1|1987-03-03|1990-07-07|미쓰비시덴기 가부시기가이샤|Color display tube having shadow mask|
    JP2609605B2|1987-03-20|1997-05-14|株式会社日立製作所|Shadow mask type color picture tube|
    US4881004A|1987-08-26|1989-11-14|Kabushiki Kaisha Toshiba|Color cathode ray tube|
    JP2685461B2|1987-12-02|1997-12-03|株式会社日立製作所|Shadow mask type color picture tube|
    FR2634945B1|1988-07-27|1996-04-26|Videocolor|METHOD FOR MANUFACTURING A HIGH DEFINITION COLOR TELEVISION TUBE AND HIGH DEFINITION TRICHROME TELEVISION TUBE|
    EP0387738A1|1989-03-13|1990-09-19|Matsushita Electric Industrial Co., Ltd.|Flat panel display device|
    JPH0614454B2|1990-03-22|1994-02-23|松下電子工業株式会社|Shadow mask type color picture tube|
    IT1239510B|1990-03-30|1993-11-03|Videocolor Spa|CATHODE TUBE HAVING A PERFECTED FRONT SHEET, WITH 16/9 "WIDTH / HEIGHT RATIO|
    JP3171900B2|1992-01-31|2001-06-04|株式会社東芝|Cathode ray tube|
    WO1998042004A1|1997-03-14|1998-09-24|Kabushiki Kaisha Toshiba|Color cathode ray tube|
    EP1079412A3|1999-08-21|2002-11-27|Schott Glas|Television tube|
    KR100402738B1|2000-02-29|2003-10-22|삼성에스디아이 주식회사|Panel of cathode ray tube|
    DE10114674A1|2001-03-23|2002-10-17|Trend Network Ag|Image information display device has different image informations provided via respective sections of curved image screen|
    JP3701943B2|2002-02-28|2005-10-05|三星コーニング株式会社|Formed flat panel for cathode ray tube|
    US7148616B2|2004-04-07|2006-12-12|Matsushita Toshiba Picture Display Co., Ltd.|Color picture tube|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/469,774|US4786840A|1983-02-25|1983-02-25|Cathode-ray tube having a faceplate panel with a substantially planar periphery|
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