公开(公告)号：GB2286100A

公开(公告)日：1995-08-02

申请号：GB9400983

申请日：1994-01-19

Applicant: IBM

Inventor： FINDLAY VALERIE MCCLAREN ,  KNOX ANDREW RAMSAY

IPC: G06F3/041 ,  G06F3/033 ,  G06F3/037

公开(公告)号：DE69838476T2

公开(公告)日：2008-06-26

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).

公开(公告)号：AT374431T

公开(公告)日：2007-10-15

申请号：AT99305204

申请日：1999-07-01

Applicant: IBM

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

IPC: H01J1/46 ,  H01J3/02 ,  H01J29/02 ,  H01J29/46 ,  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.

公开(公告)号：DE69814512T2

公开(公告)日：2004-03-25

申请号：DE69814512

申请日：1998-03-19

Applicant: IBM

Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSAY

IPC: H01J29/68 ,  H01J31/12

Abstract: A magnet (1700) for use in a magnetic matrix display has a two dimensional array of apertures between opposite poles of the magnet. The direction of the magnetic field is such that the magnet generates, in each channel, a collimating magnet field for forming electrons from a cathode into an electron beam. A 'keeper' area (1710) around the periphery of the magnet is used to improve the linearity of the field strength in the apertures from apertures at the centre of the magnet to apertures at the periphery of the magnet. The 'keeper' area may have control circuits placed on the surface of that area of the magnet. The keeper area may contain apertures which are not used for collimation and into which electrons are prevented from entering by a grid electrode or by a physical blocking means.

公开(公告)号：FI112721B

公开(公告)日：2003-12-31

申请号：FI942813

申请日：1994-06-14

Applicant: IBM

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

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

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.

公开(公告)号：DE69814512D1

公开(公告)日：2003-06-18

申请号：DE69814512

申请日：1998-03-19

Applicant: IBM

Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSAY

IPC: H01J29/68 ,  H01J31/12

Abstract: A magnet (1700) for use in a magnetic matrix display has a two dimensional array of apertures between opposite poles of the magnet. The direction of the magnetic field is such that the magnet generates, in each channel, a collimating magnet field for forming electrons from a cathode into an electron beam. A 'keeper' area (1710) around the periphery of the magnet is used to improve the linearity of the field strength in the apertures from apertures at the centre of the magnet to apertures at the periphery of the magnet. The 'keeper' area may have control circuits placed on the surface of that area of the magnet. The keeper area may contain apertures which are not used for collimation and into which electrons are prevented from entering by a grid electrode or by a physical blocking means.

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.

公开(公告)号：GB2337358B

公开(公告)日：2002-06-05

申请号：GB9810467

申请日：1998-05-16

Applicant: IBM

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

IPC: G09G1/20 ,  G09G3/22 ,  H01J29/68 ,  H04N5/68 ,  H01J31/12

公开(公告)号：GB2366542A

公开(公告)日：2002-03-13

申请号：GB0022128

申请日：2000-09-09

Applicant: IBM

Inventor： KNOX ANDREW RAMSAY ,  LONGOBARDI GIUSEPPE

IPC: G06F1/16

Abstract: A notebook/laptop computer keyboard 102 (Fig.3) includes a backlit display 248 which is hingeably attached 106 thereto. The arrangement comprises at least one translucent key 110 (Fig.4) and at least one fibre-optic cable 302 which conducts light from the backlight of the display via an optical conducting portion 404 to illuminate a translucent top portion 402 of the key. The level of illumination may be varied by using the fibre-optic cable(s) to transmit light through two optically transparent portions (502,504,Fig.5), wherein the two portions have an area of contact between them which may be varied by sliding portion 504 along portion 502 in the direction of arrow 506. The colour of light used for illumination may be adjusted by an arrangement which includes a rotatable prism (704,Fig.7) which receives light 708 from the backlight and splits the received light according to the wavelength thereof, and a coupler 706 which collects all or a portion of the light split by the prism and transmits all the collected light to the fibre-optic cable(s) 710 which conducts the light to illuminate the keyboard. The illumination arrangement may be applied to other portions of the computer, for example, a pointing device, or a manufacturer's logotype.

公开(公告)号：GB2326018B

公开(公告)日：2002-01-09

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: A magnetic matrix display device has a grid electrode in which differing first grid (G1) and second grid (G2) apertures are used. A sensor element and a second grid electrode are combined as a single structure. Other aspects of the invention relate to a deflection anode having reduced capacitance, the use of a polyimide coating for the grid electrodes, the use of a compliant mounting and adjustment for a grid assembly and the provision of an illuminated border on a magnetic matrix display.