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    • 2. 发明专利
      CA974805A CORRECTING LENSES AND METHOD OF MANUFACTURE 未知
    • CORRECTING LENSES AND METHOD OF MANUFACTURE
    • CA974805A
    • 1975-09-23
    • CA157780
    • 1972-11-29
    • HITACHI LTD
    • YAMAZAKI EIICHI , OGURA IWAO , UEDA TOSHIO , MARUYAMA KOICHI , SHIMIZU KENJI
    • G02B3/08 , H01J9/227
    • 1389096 Colour television tubes HITACHI Ltd 28 Nov 1972 [29 Nov 1971 19 Jan 1972] 54876/72 Heading H1D A connecting lens for use in the lighthouse method of producing a shadow-mask colour television phosphor dot screen, which may be of block matrix type, has each surface divided into a plurality of areas of plane or curved surface by lines of surface gradient discontinuity, the superimposed lines on the two sides of the lens intersecting one another to define a plurality of lens regions designed to reduce misregister, while permitting easier manufacture of the lens than for the case in which all the gradient discontinuities occur on one surface of the lens. The lines of discontinuity may on each side of the lens be straight and parallel, but oriented in different directions on the two sides, e.g. perpendicularly in Fig. 5B, in which 903 represents a vertically oriented ridge, or the lines on one side may be concentric circles (Figs. 18 and 19, not shown). A variety of surface configura. tions is shown in the drawings; a central portion of one or both surfaces may be plane and perpendicular to the lens thickness (Fig. 23, not shown); and the area on one side of the lens may all exhibit on inclination in the same sense (Fig. 10, not shown), or may exhibit inclinations of opposite sense, as in Fig. 5B. The lens may be produced by applying an aluminium or silver film to a laquer mother mould; nickel plating on this film; and then casting thereon a substantial base layer of copper or nickel, whereafter the base and the metal layers are removed from the mother mould and constitute a final mould, between a pair of which a sheet of heated acrylic resin is pressed to form the lens. The lens may, alternatively, be formed by bonding together two resin sheets, each contained, by the above method, only on one surface.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 5. 发明专利
      CA1076635A MAGNETIC PLATES FOR COMA CORRECTION OF IN-LINE GUN COLOR PICTURE TUBE 未知
    • MAGNETIC PLATES FOR COMA CORRECTION OF IN-LINE GUN COLOR PICTURE TUBE
    • CA1076635A
    • 1980-04-29
    • CA269853
    • 1977-01-17
    • HITACHI LTD
    • ANDO KUNIO , HIROTA RYOICHI , OSAKABE KUNIHARU , MARUYAMA KOICHI
    • H01J29/76
    • MAGNETIC PLATES FOR COMA CORRECTION OF IN-LINE GUN COLOR PICTURE TUBES A color picture tube of an in-line type comprises means for deflecting beams of electron emitted from electron guns of the in-line type aligned horizontally such that for the horizontal deflection, the central beam is subjected to a greater deflection than side beams and for the vertical deflection, the side beams are subjected to a greater deflection than the central beam. Two vertical magnetic pole piece plates which are long vertically and thin horizontally are so disposed as to sandwich the central beam near the outlet of the central electron gun in order to weaken the horizontal deflection magnetic field. acting on the central beam, whereby a portion of the horizontal deflection magnetic flux acting on the central beam is absorbed by the two magnetic pole piece plates. The vertical deflection magnetic field is almost not affected by these vertical magnetic pole piece plates. Further, two horizontal magnetic pole piece plates which are long horizontally and short vertically are so disposed as to sandwich side beams near the outlets of the side electron guns in order to weaken vertical deflection magnetic fields acting on the side beams and to intensify vertical deflection magnetic fields acting on the central beam.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 9. 发明专利
      DE2258468A1  未知
    • DE2258468A1
    • 1973-06-07
    • DE2258468
    • 1972-11-29
    • HITACHI LTD
    • MARUYAMA KOICHI , MOBARA CHIBA , YAMAZAKI EIICHI , OGURA IWAO , UEDA TOSHIO , SHIMIZU KENJI
    • G02B3/08 , H01J9/227
    • 1389096 Colour television tubes HITACHI Ltd 28 Nov 1972 [29 Nov 1971 19 Jan 1972] 54876/72 Heading H1D A connecting lens for use in the lighthouse method of producing a shadow-mask colour television phosphor dot screen, which may be of block matrix type, has each surface divided into a plurality of areas of plane or curved surface by lines of surface gradient discontinuity, the superimposed lines on the two sides of the lens intersecting one another to define a plurality of lens regions designed to reduce misregister, while permitting easier manufacture of the lens than for the case in which all the gradient discontinuities occur on one surface of the lens. The lines of discontinuity may on each side of the lens be straight and parallel, but oriented in different directions on the two sides, e.g. perpendicularly in Fig. 5B, in which 903 represents a vertically oriented ridge, or the lines on one side may be concentric circles (Figs. 18 and 19, not shown). A variety of surface configura. tions is shown in the drawings; a central portion of one or both surfaces may be plane and perpendicular to the lens thickness (Fig. 23, not shown); and the area on one side of the lens may all exhibit on inclination in the same sense (Fig. 10, not shown), or may exhibit inclinations of opposite sense, as in Fig. 5B. The lens may be produced by applying an aluminium or silver film to a laquer mother mould; nickel plating on this film; and then casting thereon a substantial base layer of copper or nickel, whereafter the base and the metal layers are removed from the mother mould and constitute a final mould, between a pair of which a sheet of heated acrylic resin is pressed to form the lens. The lens may, alternatively, be formed by bonding together two resin sheets, each contained, by the above method, only on one surface.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
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