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199 条记录 (耗时 0.014 秒)

    Grounding arrangement useful in a display apparatus
    55.
    发明公开
    Grounding arrangement useful in a display apparatus 失效
    显示装置中的接地装置有用的接地装置在显示装置中有用

    公开(公告)号：EP0221754A3

    公开(公告)日：1988-11-23

    申请号：EP86308377

    申请日：1986-10-28

    申请人： RCA LICENSING CORPORATION

    发明人： Testin, William John

    IPC分类号： H04N05/21 ,  H02H09/00

    CPC分类号： H04N5/44

    摘要： The control unit (21) for a display system is partitioned into first (27) and second (29) interconnected control units so as to permit respective separate ground terminals (53a,53b) to be utilized. The separate ground terminals allow stable grounding for sensitive circuits in each of the control units without the formation of a continuous, closed ground loop which would be susceptible to disturbances due to ground currents induced from the magnetic field of the deflection unit of the display system. A theshold responsive gate (55) is coupled between the separate ground terminals to inhibit excessively large and potentially damaging voltages due to picture tube discharges from being developed between the ground terminals.

    Multibeam electron gun for cathode-ray tube
    56.
    发明公开
    Multibeam electron gun for cathode-ray tube 失效
    多针电子枪用于阴极射线管

    公开(公告)号：EP0213876A3

    公开(公告)日：1988-10-12

    申请号：EP86306409

    申请日：1986-08-19

    申请人： RCA LICENSING CORPORATION

    发明人： Opresko, Stephen Thomas

    IPC分类号： H01J29/50

    CPC分类号： H01J29/485 ,  H01J2229/4872 ,  H01J2229/4896

    摘要： The gun comprises a modular beam-forming region (BFR) assembly (12) and a main focusing lens (22) affixed to two insulative support rods or beads (14). Ihe BFR assembly includes a plurality of cathode assemblies (16), and control (18) and screen (20) grid electrodes having aligned apertures (60, 62) therethrough for passage of a plurality of electron beams from the cathode assemblies. The cathode assemblies and the electrodes are individually held in position from a common ceramic member (50) having a first major surface (52) and an oppositely disposed second major surface (54), with a metallized pattern (56a,56b,56c) formed on at least a portion of each major surface. The control and screen grid electrodes are attached to the first major surface, and the cathode assemblies are attached to the second major surface. A transition member (66), disposed between the metallized pattern (56a,56b) on the first major surface and the screen grid electrode, includes a flat portion (74) attached to the metallized pattern (56b) and two upright portions (76) perpendicular to the flat portion and parallel to each other. The screen grid electrode comprises at least one plate-like member (20a,20b,20c) disposed between the upright portions and connected thereto by a plurality of step-like support members (82) each including a screen grid electrode contact portion (84), a bead support contact portion (86) and a central riser portion (88) extending between the contact portions. The screen grid electrode is longitudinally spaced from the control grid electrode, and the central riser portion is laterally positioned and attached to the upright portions of the transition member. The bead support contact portions are attached to respective bead support members (15) affixed to the insulative support rods, whereby the screen grid electrode is longitudinally spaced from the main focusing lens.

    Cathode-ray tube arc-over protection for digital data in television display apparatus
    57.
    发明公开
    Cathode-ray tube arc-over protection for digital data in television display apparatus 失效
    电视显示设备中数字数据的阴极射线管弧保护

    公开(公告)号：EP0203763A3

    公开(公告)日：1988-09-21

    申请号：EP86303733

    申请日：1986-05-16

    申请人： RCA LICENSING CORPORATION

    发明人： Stoughton, John William

    IPC分类号： G06F11/00 ,  G06F03/14

    CPC分类号： G06F11/1441

    摘要： Arc-over in the cathode ray tube (21) of a digital television receiver produces a large current pulse which, when it discharges via the chassis ground, disrupts the reference ground potentials of other circuitry coupled to the chassis ground. The affected circuitry includes digital data storage elements which may experience random state changes caused by the fluctuating ground potential. The CRT arc-over condition is detected by circuitry (460-466) which applies a pulse to the reset terminal of a microprocessor (440), causing it to restore the potentially corrupted data in the data storage elements using preset data stored in a less volatile programmable read only memory (452).