公开(公告)号：DE69402615D1

公开(公告)日：1997-05-22

申请号：DE69402615

申请日：1994-02-03

Applicant: IBM

Inventor： JACKSON FREDERICK S ,  LEAVER DAVID ,  KNOX ANDREW RAMSEY ,  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：DE69719716T2

公开(公告)日：2003-11-20

申请号：DE69719716

申请日：1997-12-16

Applicant: IBM

Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSEY

IPC: H01J31/12 ,  H01J29/46 ,  H01J29/52

Abstract: A display device comprises field emission cathode means for emitting electrons. A plurality of electron beams are formed from the field emission cathode means. A screen, which has a phosphor coating facing the cathode receives the plurality of electron beams. The phosphor coating comprises a plurality of pixels each corresponding to a different one of said plurality of electron beams. A grid electrode means is disposed between the cathode means and the screen for controlling the flow of electrons from the cathode means. The field emission cathode means comprises extractor grid means, having a plurality of separately addressable portions associated with each of said plurality of pixels. A gamma transfer function between input data value and beam current is provided in order to emulate a conventional CRT. This can be achieved by use of a lookup table.

公开(公告)号：DE69719716D1

公开(公告)日：2003-04-17

申请号：DE69719716

申请日：1997-12-16

Applicant: IBM

Inventor： BEETESON JOHN STUART ,  KNOX ANDREW RAMSEY

IPC: H01J31/12 ,  H01J29/46 ,  H01J29/52

Abstract: A display device comprises field emission cathode means for emitting electrons. A plurality of electron beams are formed from the field emission cathode means. A screen, which has a phosphor coating facing the cathode receives the plurality of electron beams. The phosphor coating comprises a plurality of pixels each corresponding to a different one of said plurality of electron beams. A grid electrode means is disposed between the cathode means and the screen for controlling the flow of electrons from the cathode means. The field emission cathode means comprises extractor grid means, having a plurality of separately addressable portions associated with each of said plurality of pixels. A gamma transfer function between input data value and beam current is provided in order to emulate a conventional CRT. This can be achieved by use of a lookup table.

公开(公告)号：DK0630036T3

公开(公告)日：1997-10-27

申请号：DK94101588

申请日：1994-02-03

Applicant: IBM

Inventor： LEAVER DAVID ,  JACKSON FREDERICK S ,  KNOX ANDREW RAMSEY ,  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：DE69402615T2

公开(公告)日：1997-09-25

申请号：DE69402615

申请日：1994-02-03

Applicant: IBM

Inventor： JACKSON FREDERICK S ,  LEAVER DAVID ,  KNOX ANDREW RAMSEY ,  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.