中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

102 records (took 0.036 seconds)

    83.
    发明专利
    未知

    公开(公告)号：NO941869D0

    公开(公告)日：1994-05-19

    申请号：NO941869

    申请日：1994-05-19

    Applicant: IBM

    Inventor： JACKSON FREDERICK S ,  LEAVER DAVID ,  KNOX ANDREW RAMSAY ,  BEETESON JOHN

    IPC: G09G1/00 ,  H01J20060101 ,  H01J15/04 ,  H01J29/00 ,  H01J29/06 ,  H01J29/98 ,  H04N3/16 ,  H04N9/29 ,  H01J

    Abstract: A cathode ray tube display having reduced electric field emissions comprising a cathode ray tube 100, an element 200 for detecting modulations in the final anode voltage of the CRT, the signal not being directly dependent on the deflection driving means 115. A matching network 205 provides phase and gain correction to the signal from element 200, amplification means 210 receives the signal from network 205 and an emission means 215 radiates a cancelling electric field dependent on the modulations detected by said element 200.

    84.
    发明专利
    未知

    公开(公告)号：DE69937170T2

    公开(公告)日：2008-06-26

    申请号：DE69937170

    申请日：1999-07-01

    Applicant: IBM

    Inventor： BEETESON JOHN STUART ,  KNICKERBOCKER JOHN ULRICH ,  KNOX ANDREW RAMSAY ,  LOWE ANTHONY CYRIL

    IPC: H01J1/46 ,  H01J29/46 ,  H01J3/02 ,  H01J29/02 ,  H01J29/68 ,  H01J31/12

    Abstract: An electron source comprises a cathode means, and an extractor grid used to extract electrons from the cathode. The extractor grid is formed by etching a plurality of apertures in the material. A plurality of spacing members for spacing the extractor grid at a constant, predetermined spacing from the cathode are used. Each of the spacing members is formed by etching around a substantial portion of the periphery of the aperture and folding a remaining portion of the periphery of the aperture at substantially a right angle to the planar material.

    85.
    发明专利
    未知

    公开(公告)号：DE69838476D1

    公开(公告)日：2007-11-08

    申请号：DE69838476

    申请日：1998-12-08

    Applicant: IBM

    Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSAY ,  LOWE ANTHONY CYRIL

    IPC: H01J9/12 ,  H01J31/12 ,  H01J1/34 ,  H01J1/46 ,  H01J9/02 ,  H01J29/04 ,  H04N5/68

    Abstract: A photo-cathode electron source suitable for use in flat panel displays has an extractor grid means (104) maintained, in use, at a positive potential with respect to the photo-cathode surface. The extractor grid may be used as a carrier for unfired photoemissive material which forms the emission surface of the photo-cathode. The material is deposited on the surface (103) of the photo-cathode means (102) by means of evaporation from the extractor grid (104).

    Keyboard illumination for computing devices having backlit displays
    86.
    发明专利
    Keyboard illumination for computing devices having backlit displays 未知

    公开(公告)号：GB2366542B

    公开(公告)日：2004-02-18

    申请号：GB0022128

    申请日：2000-09-09

    Applicant: IBM

    Inventor： KNOX ANDREW RAMSAY ,  LONGOBARDI GIUSEPPE

    IPC: G06F1/16

    Abstract: Apparatus is disclosed for illumination of a keyboard in a computing device having a display contained in a portion of the computing device which is hingeably attached to a keyboard portion, the display having a backlight. The system comprises one or more translucent elements associated with the keyboard and one or more light-conducting fibers for conducting light from the backlight of the backlit display to the one or more translucent elements associated with the keyboard. The level of illumination is varied by means of the one or more light conducting fibers transmitting light through two portions of transparent material, the two portions of transparent material have an area of contact between them which may be varied. A color adjustment mechanism is also provided.

    87.
    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.

    88.
    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).

    Display device
    89.
    发明专利
    Display device 未知

    公开(公告)号：GB2353633A

    公开(公告)日：2001-02-28

    申请号：GB0027015

    申请日：1996-06-13

    Applicant: IBM

    Inventor： BEETESON JOHN ,  KNOX ANDREW RAMSAY

    IPC: G09G1/20 ,  G09G3/22 ,  H01J29/68 ,  H01J29/86 ,  H01J31/15 ,  H04N13/00 ,  H01J31/12 ,  H01J29/58 ,  H01J29/70

    Abstract: Display device comprising a cathode 20, a permanent magnet 60, a two dimensional array of rows and columns of channels 70 extending between opposite poles of the magnet for receiving electrons from the cathode. A screen 90 has a plurality of phosphor pixels 80 each corresponding to a different channel where the pixels may be made up of a plurality of sub-pixels. Grid electrode 40 is disposed between the cathode and the magnet whilst anode means 50 is disposed between the screen and the magnet. Anode means 50 may comprise a plurality of pairs of anodes extending parallel to the columns of channels and each pair having first and second anodes extending along opposite sides of the corresponding column of channels. A focus electrode 120 is disposed between the screen and the anode means and may comprise a plane electrical conductor having slots aligned with a different column of channels. Control signals are supplied to the grid electrode to selectively control the flow of electrons from the cathode through each channel to the corresponding pixel. An anode drive circuit supplies anode drive signals to the anode means for accelerating electrons through the channels. The anode drive signals may comprise deflection signals to sequentially deflect electrons emerging from each channel towards different sub-pixels of the corresponding pixel. A focus drive circuit supplies a signal to the focus electrode to focus the electrons emerging from the channels onto the screen. The focus electrode may be driven with a parabolic waveform. The beams of electrons travelling from the cathode means to the screen may be rotated by varying the signal supplied to the focus electrode.

Patent Agency Ranking