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    13.
    发明专利
    未知

    公开(公告)号：DE69714175D1

    公开(公告)日：2002-08-29

    申请号：DE69714175

    申请日：1997-09-19

    Applicant: IBM

    Inventor： BEETESON JOHN ,  KNOX ANDREW RAMSAY ,  PIETRZAK CHRISTOPHER CARLO

    IPC: H01J17/49 ,  H01J29/02 ,  H01J29/04 ,  H01J29/48 ,  H01J29/68 ,  H01J29/86 ,  H01J29/87 ,  H01J31/12

    Abstract: A display device comprises a screen. A back plate is sealed to the screen to form an evacuated chamber. Area cathode means is disposed between the back plate and the screen. A permanent magnet is disposed between the cathode and the screen. A two dimensional array of rows and columns of channels extends between opposite poles of the magnet for receiving electrons from the cathode means. An anode phosphor layer is disposed between screen and the magnet for receiving electrons from the channels. Grid electrode means between the area cathode means and the magnet controls flow of electrons from the cathode means into the channels. Anode means between the magnet and the anode phosphor layer controls flow of electrons from the channels towards the screen. In one such arrangement, the screen comprises a layer of a plastic material. In another such arrangement a plurality of spacers are disposed between the screen and the magnet. Each spacer has an elongate body having a larger cross sectional area at one end of the spacer tapering to a smaller cross sectional area at the other end of the spacer. In another such arrangement, and a plurality of spacers are disposed between the magnet and cathode. The spacers are located in recesses formed in the grid electrode means. In yet another such arrangement, the cathode means comprises a back-plate and a silica glass substrate peripherally sealed to the back-plate to produce a chamber. A gas is contained in the chamber. A layer of photo-sensitive material is disposed on the surface of the substrate external to the chamber. A cathode phosphor layer is disposed between the back plate and the substrate. A pair of electrodes facing each other from opposite sides of the chamber energises the gas to generate a plasma for exciting the phosphor to generate light energy to produce electron emissions from the photo-cathode.

    18.
    发明专利
    未知

    公开(公告)号：DE69714175T2

    公开(公告)日：2003-02-13

    申请号：DE69714175

    申请日：1997-09-19

    Applicant: IBM

    Inventor： BEETESON JOHN ,  KNOX ANDREW RAMSAY ,  PIETRZAK CHRISTOPHER CARLO

    IPC: H01J17/49 ,  H01J29/02 ,  H01J29/04 ,  H01J29/48 ,  H01J29/68 ,  H01J29/86 ,  H01J29/87 ,  H01J31/12

    Abstract: A display device comprises a screen. A back plate is sealed to the screen to form an evacuated chamber. Area cathode means is disposed between the back plate and the screen. A permanent magnet is disposed between the cathode and the screen. A two dimensional array of rows and columns of channels extends between opposite poles of the magnet for receiving electrons from the cathode means. An anode phosphor layer is disposed between screen and the magnet for receiving electrons from the channels. Grid electrode means between the area cathode means and the magnet controls flow of electrons from the cathode means into the channels. Anode means between the magnet and the anode phosphor layer controls flow of electrons from the channels towards the screen. In one such arrangement, the screen comprises a layer of a plastic material. In another such arrangement a plurality of spacers are disposed between the screen and the magnet. Each spacer has an elongate body having a larger cross sectional area at one end of the spacer tapering to a smaller cross sectional area at the other end of the spacer. In another such arrangement, and a plurality of spacers are disposed between the magnet and cathode. The spacers are located in recesses formed in the grid electrode means. In yet another such arrangement, the cathode means comprises a back-plate and a silica glass substrate peripherally sealed to the back-plate to produce a chamber. A gas is contained in the chamber. A layer of photo-sensitive material is disposed on the surface of the substrate external to the chamber. A cathode phosphor layer is disposed between the back plate and the substrate. A pair of electrodes facing each other from opposite sides of the chamber energises the gas to generate a plasma for exciting the phosphor to generate light energy to produce electron emissions from the photo-cathode.

    19.
    发明专利
    未知

    公开(公告)号：DE69805678D1

    公开(公告)日：2002-07-11

    申请号：DE69805678

    申请日：1998-01-29

    Applicant: IBM

    Inventor： BEETESON JOHN ,  KNOX ANDREW RAMSAY ,  PIETRZAK CHRISTOPHER CARLO

    IPC: H01J31/15 ,  G09G1/20 ,  H01J3/02 ,  H01J29/04 ,  H01J31/12 ,  H01J29/48 ,  H01J29/46 ,  H01J21/00

    Abstract: A virtual remote cathode has the position of a space charge cloud associated with it fixed by the geometry of a fixed insulating plate (902). The plate (902) can be made to accurate dimensions and hence the virtual remote cathode to control grid (502) distance can be accurately controlled and will not change as a result of any mechanical, electrical or physical changes in the construction. The fixed insulating plate (902) is located on a surface of the control grid (502) facing the cathode (510).

    Magnetic matrix display devices
    20.
    发明专利
    Magnetic matrix display devices 未知

    公开(公告)号：GB2326018A

    公开(公告)日：1998-12-09

    申请号：GB9711744

    申请日：1997-06-07

    Applicant: IBM

    Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSAY ,  PIETRZAK CHRISTOPHER CARLO

    IPC: H01J29/46 ,  H01J29/68 ,  H01J31/12 ,  H01J29/02 ,  H01J29/08 ,  H01J29/80

    Abstract: In a magnetic matrix display device comprising a cathode 20, grids 71,72, a magnet 140 having a two-dimensional array of channels 160, anode 30 and a phosphor coating 150 made up of a plurality of pixels, electrons passing through the channels are directed to the pixels by arrays of first and second deflection anodes 302,304. In order to reduce the capacitance of the anodes, each array is divided into number of groups (fig 5), with each group being driven by a respective driver. The grids 71,72, which are arranged in orthogonal rows and columns, have holes corresponding to the entrances to the channels. The holes in one grid may be of a different size to those in the other grid. The capacitance associated with each grid may also be reduced by narrowing them in regions between the channel entrances. A current sensor may be combined with one of the grids. Other aspects of the invention relate to the use of a polyimide coating for the grids, the use of a compliant mounting and adjustment for a grid assembly and the provision of an illuminated border for the display.

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