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    Shadow mask colour CRT with enhanced resolution and/or brightness.
    1.
    发明公开
    Shadow mask colour CRT with enhanced resolution and/or brightness. 失效
    Schattenmasken-Farbbildkathodenstrahlröhremit verbesserterAuflösungund / oder Helligkeit。

    公开(公告)号：EP0205699A1

    公开(公告)日：1986-12-30

    申请号：EP85304638

    申请日：1985-06-28

    Applicant: IBM

    Inventor： CHASE BRIAN DAVID ,  PATON ANDREW

    IPC: H01J29/07 ,  H01J29/32 ,  H01J31/20

    CPC classification number: H01J29/07

    Abstract: A colour CRT has stripes (10) of different colour light emission phosphors (r, g and b) deposited on a face plate (8) of the tube with the relative widths of the stripes being inversely proportional to the light emission efficiency of the phosphors. By this means the integrated brigthness of the emitted light from the different phosphor stripes is the same for the same value beam current. By using a novel double shadow mask arrangement, the widths of the beams from the three guns can be made to match, or substantially to match, the widths of the phosphor elements on which they land. Specifically the beam from one gun (not shown) is aligned with apertures through both masks in order to transmit a relatively wide portion of the beam onto the least efficient, in this case the red (r), phosphor. The portion of the beams transmitted by the first mask 7.1 for the other two guns (not shown) are further clipped by the relatively off-set apertures in the second mask 7.2. This arrangement enables the advantage of the balanced colour output from the screen to be enjoyed without loss of purity margin and provides a significant increase in brightness for a given beam current and/or resolution of the screen. The invention is applicable to CRTs employing shadow masks with slots and phosphor stripes, or holes and phosphor dots and also for CRTs driven in raster scan or vector mode.

    Abstract translation: 彩色CRT具有沉积在管的面板（8）上的不同颜色的发光荧光体（r，g和b）的条纹（10），其中条纹的相对宽度与荧光体的发光效率成反比 。 通过这种方式，来自不同荧光体条纹的发射光的集成度对于相同值的光束电流是相同的。 通过使用新颖的双重荫罩布置，可以使来自三个枪的光束的宽度与它们着陆的荧光体元件的宽度匹配或基本匹配。 具体地，来自一个枪（未示出）的光束通过两个掩模与孔径对准，以便将光束的相对宽的部分传输到最低效率（在这种情况下为红色（r））磷光体。 由第一掩模7.1传输的另外两个枪（未示出）的光束的部分被第二掩模7.2中相对偏移的孔进一步夹紧。 这种布置使得能够享受来自屏幕的平衡颜色输出的优点而不损失纯度裕度，并且对于给定的束电流和/或屏幕的分辨率提供明显的亮度增加。 本发明适用于采用具有槽和磷光体条纹或者孔和磷光体点的阴影掩模以及用光栅扫描或矢量模式驱动的CRT的CRT。

    CONVERGENCE UNIT FOR IN-LINE COLOUR CATHODE RAY TUBE
    5.
    发明专利
    CONVERGENCE UNIT FOR IN-LINE COLOUR CATHODE RAY TUBE 未知

    公开(公告)号：DE3271630D1

    公开(公告)日：1986-07-17

    申请号：DE3271630

    申请日：1982-03-31

    Applicant: IBM

    Inventor： CHASE BRIAN DAVID

    IPC: H01J29/51 ,  H01J29/70 ,  H04N9/28

    Abstract: A convergence unit for an in-line color cathode ray tube consists of four E-cores located around the neck of the CRT. Each E-core, preferably consisting of strip-shaped soft-magnetic material such as mumetal or permalloy, carries two coils connected so that the net magnetic field at the central beam is zero. The E-cores are arranged in paris with the resultant fields at the nearer electron beam due to each individual E-core being substantially orthogonal to one another.

    SHADOW MASK COLOUR CRT WITH ENHANCED RESOLUTION AND/OR BRIGHTNESS
    7.
    发明专利
    SHADOW MASK COLOUR CRT WITH ENHANCED RESOLUTION AND/OR BRIGHTNESS 未知

    公开(公告)号：DE3569062D1

    公开(公告)日：1989-04-27

    申请号：DE3569062

    申请日：1985-06-28

    Applicant: IBM

    Inventor： CHASE BRIAN DAVID ,  PATON ANDREW

    IPC: H01J29/07 ,  H01J29/32 ,  H01J31/20

    Abstract: A colour CRT has stripes (10) of different colour light emission phosphors (r, g and b) deposited on a face plate (8) of the tube with the relative widths of the stripes being inversely proportional to the light emission efficiency of the phosphors. By this means the integrated brigthness of the emitted light from the different phosphor stripes is the same for the same value beam current. By using a novel double shadow mask arrangement, the widths of the beams from the three guns can be made to match, or substantially to match, the widths of the phosphor elements on which they land. Specifically the beam from one gun (not shown) is aligned with apertures through both masks in order to transmit a relatively wide portion of the beam onto the least efficient, in this case the red (r), phosphor. The portion of the beams transmitted by the first mask 7.1 for the other two guns (not shown) are further clipped by the relatively off-set apertures in the second mask 7.2. This arrangement enables the advantage of the balanced colour output from the screen to be enjoyed without loss of purity margin and provides a significant increase in brightness for a given beam current and/or resolution of the screen. The invention is applicable to CRTs employing shadow masks with slots and phosphor stripes, or holes and phosphor dots and also for CRTs driven in raster scan or vector mode.

    CONVERGENCE UNIT FOR CATHODE-RAY TUBE
    9.
    发明专利
    CONVERGENCE UNIT FOR CATHODE-RAY TUBE 未知

    公开(公告)号：DE3067822D1

    公开(公告)日：1984-06-20

    申请号：DE3067822

    申请日：1980-06-13

    Applicant: IBM

    Inventor： BURR PETER ,  CHASE BRIAN DAVID

    IPC: H01J29/54 ,  H01F27/30 ,  H01J29/70 ,  H04N9/28

    Abstract: Convergence of the beams of an in-line gun shadow mask cathode-ray tube is provided by windings on a common core and generating pairs of quadruple and six-pole magnetic fields, respectively. The core is provided with non-magnetic ribs each having a projection for the purpose of locating the windings.

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