中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

86 records (took 0.024 seconds)

    82.
    发明专利
    未知

    公开(公告)号：FI58232B

    公开(公告)日：1980-08-29

    申请号：FI1673

    申请日：1973-01-04

    Applicant: RCA CORP

    Inventor： MORRELL ALBERT MAXWELL ,  BARKOW WILLIAM HENRY ,  GROSS JOSEF

    IPC: H04N9/16 ,  H01J29/50 ,  H01J29/76

    Abstract: 1385745 Colour television tubes RCA CORPORATION 1 May 1972 [14 Jan 1972] 20047/72 Heading H1D A colour television tube of the shadow mask type using three co-planar beams, is provided with a deflection yoke adapted to produce a pin cushion shaped horizontal deflecting field which causes under convergence at extreme horizontal deflection, and a barrel-shaped vertical deflecting field which causes over-convergence at extreme vertical deflection; and the electron gun is adapted to produce a spacing between the beams at the centre of the deflection yoke not greater than 0À2 inch. Dynamic convergence arrangements are then unnecessary but may be provided for larger tubes. The electron gun may comprise three individual cathodes and common G1 to G4 electrodes provided with apertures for the beams; the outer apertures of the final electrode may be surrounded by magnetically permeable material such as nickel iron to partly screen the outer beams from the deflection fields and thereby equalize the raster sizes for the three colours. The deflection yoke is as described in Specification 1385747 and is preferaby toroidal but saddle coils may be used. The shadow mask may be provided with elongate apertures, and the fluorescent screen may comprise stripes of different colours.

    CATHODE-RAY TUBE
    86.
    发明专利
    CATHODE-RAY TUBE 未知

    公开(公告)号：AU4415572A

    公开(公告)日：1974-01-10

    申请号：AU4415572

    申请日：1972-07-03

    Applicant: RCA CORP

    Inventor： GODFREY RICHARD HUGH ,  MORRELL ALBERT MAXWELL

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

    Abstract: 1358811 Colour television tubes RCA CORPORATION 21 July 1972 [22 July 1971] 34252/72 Heading H1D In a cathode ray tube having a display comprising a mosaic of discrete excited areas, the sizes of the areas are graded in a non-circular manner; this improves screen brightness and/or misregister tolerance compared with circular grading. In a shadow-mask tube with positive tolerance wherein the mask defines the areas of the luminous spots, the sizes of the apertures in the mask are graded non-circularly. In one example the contours of equal sized apertures are rectangular and run parallel to the edges of a rectangular display area; the sizes vary from 7.5 mils at the edges to 9 mils at the centre. In another example the contours are elliptical, and in a further example the contours are oval, being intermediate between ellipitcal and rectangular. In a black matrix tube with negative tolerance wherein the sizes of the luminous areas are determined by the sizes of the apertures in the matrix, the apertures may be graded in rectangular, elliptical or oval contours; in this case the shadow mask apertures may also be graded to balance the clipping and leaving tolerances and would not necessarily match the grading in the matrix.

Patent Agency Ranking