• 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 color picture tube has an inline electron gun for generating and directing three electron beams, comprising a center beam and two outer beams, along coplanar paths toward a screen of said tube. The three beams pass through a deflection zone adapted to have vertical and horizontal magnetic deflection fields established therein. The improvement comprises the inclusion of first means for weakening the effect of a portion of the horizontal magnetic deflection field on the center electron beam. Such means include elongated magnetic members located between the outer beams and the center beam with the direction of elongation being perpendicular to the plane of the electron beam paths. Also included are second means for weakening the effect of portions of both deflection fields on the two outer beams. The second means includes magnetic shield members completely surrounding each of the outer beam paths.
    公开号:SU1232132A3
    申请号:SU792763345
    申请日:1979-04-28
    公开日:1986-05-15
    发明作者:Генри Хьюз Ричард
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    .
    The invention relates to television technology, in particular to the design of color picture tubes with a coplanar arrangement of electronic projectors.
     The aim of the invention is to reduce raster distortions by correcting coma-type aberrations.
    FIG. 1 shows the proposed tube, a general view; in fig. 2 - electron-optical system (EOS), longitudinal section; in fig. 3 - the last electrode of the EOS, view from the side of the screen of the tube; in fig. 4 shows the configuration of magnetic field lines in the plane of placement of the magnetic shields.
    The color television receiving tube contains (Fig. 1) inside a vacuum flask 1 with a throat 2 EOS 3 and a luminescent screen 4 with a shadow mask 5. At the junction of the neck 2 to the conical part of the flask on its outer side a magnetic deflection system 6 is installed. Positions 7 and 8 denote, respectively, the trajectories of the deflected and non-deflected electron beams.
    EOS 3 (Fig. 2) contains three electronic spotlights located in the same plane, including sources of 9 electrons, controlling 10 and screening 11 electrodes. The focusing system is formed by a first focusing electrode 12 and a second focusing electrode 13 with a shielding cup 14. The second focusing electrode is the last one along the beams, performed with three output apertures 15 and provided with a first magnetic screen in the form of magnetic rings 16 covering the outer apertures, and the second magnetic screen in the form of parallel rods 17. The rods 17 are made of magnetic material, are located between the outer and central apertures and are oriented perpendicular to the plane of electron guns (Fig. 3). The effect of magnetic shields on magnetic field lines 18 of deflecting fields is shown in FIG. four.
    The correction of the coma during the operation of the tube is carried out as follows.
    A coma is an inequality in raster dimensions when rasters of electron beams deployed on the screen of a magnetic deflection tube
    32132-2
    The system is different due to the eccentricity of the two outer beams with respect to the central one. The task is to simultaneously reduce the horizontal and vertical dimensions of the rasters of the outer beams while reducing the horizontal size of the raster of the central beam, but at the same time maintaining the vertical 10 size of the raster of the central beam. The combination of magnetic shields in the form of rings 16 and rods 17 allows. So to act on the force lines 18 of the magnetic field, which force lines
    J5 the horizontal deflection field is pulled away from the central beam path (Fig. 4) in order to weaken the effect of this field on the central beam. The rods 17 compress the effects of the magnetic rings on the horizontal lines of force in the region of the central beam and counteract the reinforcement of the field vertically. a total deviation in this area.
    25 As a result, the vertical size of the center beam raster remains unchanged — only its horizontal size changes. The effect of magnetic screens can be adjusted, for example, by changing
    thickness of rings or rods. Thus, an increase in the thickness of the rings 16 leads to a decrease in the size of the raster of the external beams relative to the raster of the central beam, and an increase in the thickness of the rods 17 reduces the size of the raster of the central beam compared to the raster of the external beams. As a result, the maximum coma correction can be achieved and the optimal
    40
    image quality.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A color television receiving tube containing an electron-optical system with a coplanar arrangement of three spotlights and a set of spatially dispersed beams of electrodes, a luminescent screen and a magnetic deflecting system for vertical and horizontal deflections of the beams, the last electrode of the electron-optical system located in the area of the deflecting system is made with three apertures in a plane perpendicular to the longitudinal
    tube axis, and provided with two magnetic screens, one of which is made in the form of magnetic rings that span the extreme apertures of the electrode from the side facing the screen, j, which is to reduce the distortion of the raster due to coma correction, another mag324
    The screen is made in the form of two parallel rods located between the extreme and center-apertures apertures symmetrically with respect to two mutually perpendicular axes oriented perpendicular to the plane of the searchlights and made of magnetic material.
    1
    14
    fig.Z
    sixteen
    IS
    17
    Fy
    Compiled by V. Gavryushin Editor A. Lezhnin Tehred V. KadarKorrektor. Cherni
    Order 2664/60 Circulation 643 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
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    同族专利:
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    JPS54146572A|1979-11-15|
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    NL189378C|1993-03-16|
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    GB2020480A|1979-11-14|
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    引用文献:
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    NL278119A|1961-05-08|
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    JPS4833331B1|1968-02-05|1973-10-13|
    US3534208A|1968-05-24|1970-10-13|Gen Electric|Cathode ray tube having three in-line guns and center beam convergence shield modifying center beam raster size|
    JPS4833529B1|1968-12-30|1973-10-15|
    SU364984A1|1970-10-09|1972-12-28|ELECTRON-OPTICAL SYSTEM|
    JPS5126208B1|1971-05-18|1976-08-05|
    US3873879A|1972-01-14|1975-03-25|Rca Corp|In-line electron gun|
    US3800176A|1972-01-14|1974-03-26|Rca Corp|Self-converging color image display system|
    BE793992A|1972-01-14|1973-05-02|Rca Corp|CATHODIC RAY TUBE|
    US3840765A|1972-09-26|1974-10-08|Tokyo Shibaura Electric Co|Shielding member between only the control and side beams in a color cathode ray tube|
    GB1397804A|1972-09-26|1975-06-18|Tokyo Shibaura Electric Co|Colour cathode ray tube|
    US3866080A|1973-08-08|1975-02-11|Rca Corp|Inline electron gun having magnetically permeable plates for enhancing convergence of electron beams|
    NL7313905A|1973-10-10|1975-04-14|Philips Nv|DEVICE DEVICE FOR COLOR IMAGE TUBE.|
    JPS5615102B2|1974-10-14|1981-04-08|
    US4086513A|1975-03-03|1978-04-25|Rca Corporation|Plural gun cathode ray tube having parallel plates adjacent grid apertures|
    JPS5259527A|1975-11-12|1977-05-17|Hitachi Ltd|Color picture tube with deflection magnetic field control elements|
    US4142131A|1975-11-12|1979-02-27|Hitachi, Ltd.|Color picture tube|DE3123298A1|1981-06-12|1983-01-05|Standard Elektrik Lorenz Ag, 7000 Stuttgart|CATHODE RAY TUBES WITH MAGNETIC RING|
    DE3212248A1|1982-04-02|1983-10-06|Standard Elektrik Lorenz Ag|ELECTRON OPTICS OF THE ELECTRONIC RADIATOR GENERATOR SYSTEM OF A COLOR IMAGE TUBE|
    US4556819A|1983-12-13|1985-12-03|Rca Corporation|Color picture tube having inline electron gun with coma correction members|
    CA1265838A|1985-06-12|1990-02-13|Albertus A.S. Sluyterman|Colour television display tube with coma correction|
    NL8601091A|1986-04-29|1987-11-16|Philips Nv|COLOR IMAGE TUBE WITH COMA CORRECTION.|
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    JP2661024B2|1986-12-27|1997-10-08|ソニー株式会社|Cathode ray tube|
    JPH0992169A|1995-09-21|1997-04-04|Hitachi Ltd|Color cathode-ray tube|
    JP2001135259A|1999-11-02|2001-05-18|Matsushita Electronics Industry Corp|Color cathode-ray tube and apparatus thereof|
    KR100708630B1|2000-03-14|2007-04-18|삼성에스디아이 주식회사|Electron gun and color cathode ray tube utilizing the same|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/901,820|US4396862A|1978-05-01|1978-05-01|Color picture tube with means for affecting magnetic deflection fields in electron gun area|
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