• 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 display system (9) includes a cathode-ray tube (10) and self-converging yoke (30) that produces an astigmatic magnetic deflection field within the tube. The gun (26) includes beam-forming region electrodes (34,36,38,40), main focusing lens electrodes (44,46), and two electrodes (42,44) for forming a multipole lens between the beam-forming region and the main focusing lens in each of the electron beam paths. Each multipole lens is oriented to provide a correction to an associated electron beam to at least partially compensate for the effect of the astigmatic magnetic deflection field on that beam. A first multipole lens electrode (42) is located between the beam-forming region electrodes and the main focusing lens electrodes. A second multipole electrode (44) is connected to a main focusing lens electrode and located between the first multipole lens electrode and the main focusing lens, adjacent to the first multipole lens electrode.
    公开号:SU1618290A3
    申请号:SU874203381
    申请日:1987-09-28
    公开日:1990-12-30
    发明作者:Блум Стэнли；Фрэнсис Хокингс Эрик
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to television technology, in particular to color image reproduction systems.
    The aim of the invention is to improve image quality by reducing the effect of astigmatism on electron beam deflection.
    FIG. 1 shows a diagram of the electron-optical system (EOS); on
    FIG. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 2; in fig. 5 is a circuit for inserting said electrodes into electrical circuits.
    The EOS electron gun includes three cathodes 1 located in the same plane, controlling 2 and shielding 3 electrodes. The electron beam focusing system is formed by the main photo
    a lens with a lens that contains the first 4 and second 5 electrodes. These electrodes in facing end parts are provided with flanges 6 and 7, respectively, directed inside the cavity of each of the electrodes. The end part of the first electrode 4 of the main focusing lens, facing the end part of the second electrode 5, is made spatially and electrically isolated from the rest of the first electrode and is the second electrode 8 of the quadrature lens formed together with its additional first electrode 9. Aperture holes of the additional electrode 9 . provided with flares 10 in the opposite direction to the flares 6 aperture holes of the second electrode 8 of the quadrupole lens. These flanging performed within the symmetric pairs of sectors, respectively, 11 and 12 (Fig.2, 3 and 4). Here, each part of the flange of the aperture holes of the additional electrode 9 is located between the adjacent parts of the flange of the aperture holes of the second electrode 8 of the quadrupole lens. Both electrodes of the quadrupole lens are provided with leads (Fig. 5) for connecting respectively to sources of modulated voltage V (and constant focusing voltage V2.
    The device works as follows.
    The formation of a quadrupole lens in EOS provides a dynamic change in the optical power of the main focusing lens as a function of modulated voltage V. The value of the required voltage is maximum when the electron beam is deflected in the directions of the screen angle, and zero when the beam is in the center of the screen . As the beam unfolds along each line of the raster, the values of the modulated voltage change along a parabolic curve. In general, the shape of the curve is determined by the design of the deflection system (CRT). By selecting the V 1 and V2 values, the effect of astigmatism on imaging can be significantly reduced.
    0
    five
    0
    five
    0
    five
    0
    five
    0
    five
    The location of the quadrupole lens between the beam-forming area and the main focusing lens ensures low sensitivity to tolerances on the dimensions of the structure, eliminates the need to change the working length of the shielding electrode from the optimum value and the effect of the alternating quadrupole voltage on the beam current. In addition, the application of the invention provides a more efficient use of the quadrupole field, eliminates spherical aberration caused by multipoles of other orders, provides autonomy (the design does not depend on adjacent electrodes).
    Invention Formula
    Color electron beam tube with a coplanar electron-optical system, containing an electron gun inside an evacuated flask with a phosphor screen, including three electron beams arranged in the same plane of the cathode, and including the second and second electron beams the electrodes of the main focusing lens, the aperture holes in the face parts facing one another, which are provided with a flare directed inside the cavity of each of the electrodes, characterized in that, in order to increase image quality by reducing the effect of the astigmatism of the electron beam deflection, the front part of the first electrode of the main focusing lens facing the front part of the second electrode is made spatially and electrically isolated from the rest of the first electrode, and an additional electrode is placed between these parts of the first electrode , the aperture holes of which are provided with flanging of the opposite direction with respect to the flanging of the aperture holes of the end part of Vågå electrode, wherein the flanging at the additional electrode and the end portion of the first electrode formed within the symmetrical pairs of sectors and each flange part of the aperture openings of the additional electrode located in the spaces between adjacent
    five
    7
    eight
    FIG. 2
    1618290
    5-6
    Phage. 6 BB
    oo
    12
    eleven
    12 11
    eleven
    权利要求:
    Claims (1)
    [1]
    Claim
    A color cathode ray tube with a coplanar electron-optical system, containing an electron gun inside a vacuum flask with a phosphor screen, including three cathodes located in the same plane and an electron beam focusing system, including the first and second electrodes of the main focusing lens along the electron rays, aperture holes in the end parts facing one another, which are equipped with a flange directed into the cavity of each of the electrodes, characterized in that, in order to increase image quality by reducing the influence of astigmatism of electron deflection, the end part of the first electrode of the main focusing lens facing the end part of the second electrode is spatially and electrically isolated from the rest of the first electrode, and an additional aperture electrode is placed in the gap between these parts of the first electrode the holes of which are equipped with a flanging of the opposite direction with respect to the flanging of the aperture holes of the end part of the first about the electrode, while the flanges in the additional electrode and the end part of the first electrode are made within symmetric pairs of sectors and each part of the flanging of the aperture holes of the additional electrode is located in the spaces between adjacent 5 parts of the flanging of the aperture holes of the end part of the first electrode, and the additional electrode and the end part of the first The electrodes are equipped with leads for connecting, respectively, to sources of modulated voltage and constant focusing voltage.
    Aa
    Phage 2
    Bb
    Fig.Z
    Bb
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1618290A3|1990-12-30|Color crt with complanar optronic system
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    US3949262A|1976-04-06|Cathode ray tube with compensation for beam landing spot distortion due to wide-angle beam deflection
    RU1838846C|1993-08-30|Color cathode-ray tube
    US4520292A|1985-05-28|Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun
    US5539285A|1996-07-23|Cathode-ray tube with electric field correction lens for improved resolution
    KR940010986B1|1994-11-21|Electron gun for c-crt
    US5663609A|1997-09-02|Electron gun assembly having a quadruple lens for a color cathode ray tube
    US4558253A|1985-12-10|Color picture tube having an inline electron gun with asymmetric focusing lens
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    US6621202B2|2003-09-16|Cathode ray tube apparatus including an electron gun assembly capable of dynamic astigmatism compensation
    US3875446A|1975-04-01|Acute angle source of plural beams for color cathode ray tube
    KR960016431B1|1996-12-11|Electron gun for crt
    KR910009635B1|1991-11-23|Dynamic focus electron gun
    US5798603A|1998-08-25|Cathode ray tube having improved beam convergence
    JP3926853B2|2007-06-06|Color picture tube
    EP1037251A1|2000-09-20|Cathode ray tube
    US6259195B1|2001-07-10|Cathode ray tube provided with an electron gun, and electrostatic lens system
    同族专利:
    公开号 | 公开日
    FI89221B|1993-05-14|
    FI874130A|1988-03-30|
    DK508887D0|1987-09-28|
    BR8705002A|1988-05-24|
    MX160063A|1989-11-17|
    FI89221C|1993-08-25|
    DD262525A5|1988-11-30|
    KR960000531B1|1996-01-08|
    PT85665A|1988-10-14|
    PL267973A1|1988-09-01|
    KR880004539A|1988-06-07|
    JPH067458B2|1994-01-26|
    AU597425B2|1990-05-31|
    CN1042373C|1999-03-03|
    AU7883187A|1988-03-31|
    DK508887A|1988-03-30|
    JP2780738B2|1998-07-30|
    IN169013B|1991-08-17|
    US4731563A|1988-03-15|
    ZA877312B|1988-06-29|
    EP0265683A1|1988-05-04|
    PT85665B|1994-09-30|
    JPS6386337A|1988-04-16|
    CA1245344A|1988-11-22|
    PL157239B1|1992-05-29|
    AT58260T|1990-11-15|
    JPH08102267A|1996-04-16|
    DE3766070D1|1990-12-13|
    EP0265683B1|1990-11-07|
    ES2018809B3|1991-05-16|
    FI874130A0|1987-09-22|
    DD273718A5|1989-11-22|
    HK177895A|1995-12-01|
    CN87106708A|1988-05-11|
    MX170842B|1993-09-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL108855C|1956-09-07|
    US3317769A|1963-10-14|1967-05-02|Philips Corp|Cathode-ray tube having a quadripole electrostatic focusing lens|
    US3504211A|1965-05-12|1970-03-31|Hitachi Ltd|Electron beam control device for use with a cathode ray tube for dynamic correction of electron beam astigmatism and defocusing|
    NL151555B|1967-11-11|1976-11-15|Philips Nv|ELECTRON BEAM TUBE FOR DISPLAYING COLORED IMAGES.|
    JPS5520329B2|1974-05-23|1980-06-02|
    US3961223A|1975-03-04|1976-06-01|United Technologies Corporation|Astigmatic focus correction circuit|
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    US4214188A|1978-05-22|1980-07-22|Motorola, Inc.|Dynamic focus for a cathode ray tube|
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    JPH0719541B2|1985-04-30|1995-03-06|株式会社日立製作所|In-line color picture tube|US4877998A|1988-10-27|1989-10-31|Rca Licensing Corp.|Color display system having an electron gun with dual electrode modulation|
    KR910009635B1|1989-03-09|1991-11-23|삼성전관 주식회사|Dynamic focus electron gun|
    KR910005220Y1|1989-06-10|1991-07-22|삼성전관 주식회사|Dynamic focus electron gun|
    JPH088078B2|1989-10-16|1996-01-29|松下電子工業株式会社|Color picture tube device|
    KR970008564B1|1989-11-21|1997-05-27|엘지전자 주식회사|Color cathode-ray tube of electron gun|
    KR920005828Y1|1990-01-31|1992-08-22|삼성전관 주식회사|Electron gun structure of color crt|
    US5066887A|1990-02-22|1991-11-19|Rca Thomson Licensing Corp.|Color picture tube having an inline electron gun with an astigmatic prefocusing lens|
    FR2660111B1|1990-03-22|1992-06-12|Videocolor Sa|PROCESS FOR DETERMINING THE OPTIMAL POSITION OF A QUADRIPOLAR LENS IN A CATHODE RAY TUBE.|
    FR2682809B1|1991-10-21|1993-12-31|Thomson Tubes Displays Sa|CATHODE RAY TUBE WITH IMPROVED ELECTRON CANON.|
    JP3339059B2|1991-11-14|2002-10-28|ソニー株式会社|Cathode ray tube|
    JP2605202B2|1991-11-26|1997-04-30|三星電管株式會社|Electron gun for color cathode ray tube|
    US5532547A|1991-12-30|1996-07-02|Goldstar Co., Ltd.|Electron gun for a color cathode-ray tube|
    US5399946A|1992-12-17|1995-03-21|Samsung Display Devices Co., Ltd.|Dynamic focusing electron gun|
    EP0725973B1|1994-08-25|1998-12-30|Koninklijke Philips Electronics N.V.|Cathode ray tube provided with an electron gun, and electrostatic lens system|
    JPH08190877A|1995-01-09|1996-07-23|Hitachi Ltd|Cathode-ray tube|
    KR100189611B1|1995-07-28|1999-06-01|구자홍|Electron gun for cathode ray tube|
    JPH09190773A|1996-01-08|1997-07-22|Hitachi Ltd|Cathode-ray tube electron gun and cathode-ray tube|
    EP0837487B1|1996-10-21|2002-11-13|Lg Electronics Inc.|Focusing electrode in electron gun for color cathode ray tube|
    TW402732B|1998-06-09|2000-08-21|Koninkl Philips Electronics Nv|Cathode ray tube comprising an electron gun|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/912,632|US4731563A|1986-09-29|1986-09-29|Color display system|
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