公开(公告)号：NO774329A

公开(公告)日：1978-06-23

申请号：NO774329

申请日：1977-12-15

Applicant: IBM

Inventor： HALLET MICHAEL HENRY ,  SOWTER BRIAN RAYMOND

IPC: G06F3/153 ,  G09G1/00 ,  G09G1/04 ,  G09G1/28 ,  G09G5/30 ,  H04N3/23 ,  H04N9/28 ,  H01J

CPC classification number: H04N9/28

公开(公告)号：NO151913B

公开(公告)日：1985-03-18

申请号：NO774329

申请日：1977-12-15

Applicant: IBM

Inventor： HALLET MICHAEL HENRY ,  SOWTER BRIAN RAYMOND ,  HENEGHAN MICHAEL JAMES

IPC: G09G1/00 ,  G09G1/04 ,  G06F3/153 ,  G09G1/28 ,  G09G5/30 ,  H04N3/23 ,  H04N9/28 ,  H01J29/56

Abstract: A three color gun cathode ray tube has convergence correction signals derived from digital signals stored in a digital data store. The screen of the tube is divided into a plurality of areas and a digital correction signal derived for each area. The system is arranged so that when the three beams are scanning a particular area the digital correction signal associated with that area is read out from the digital store, passed through a digital to analog converter and then applied to the convergence coils of the tube.

公开(公告)号：NO774329L

公开(公告)日：1978-06-23

申请号：NO774329

申请日：1977-12-15

Applicant: IBM

Inventor： HALLET MICHAEL HENRY ,  SOWTER BRIAN RAYMOND

IPC: G09G1/00 ,  G06F3/153 ,  G09G1/04 ,  G09G1/28 ,  G09G5/30 ,  H04N3/23 ,  H04N9/28 ,  H01J

Abstract: A three color gun cathode ray tube has convergence correction signals derived from digital signals stored in a digital data store. The screen of the tube is divided into a plurality of areas and a digital correction signal derived for each area. The system is arranged so that when the three beams are scanning a particular area the digital correction signal associated with that area is read out from the digital store, passed through a digital to analog converter and then applied to the convergence coils of the tube.

公开(公告)号：NO151913C

公开(公告)日：1985-06-26

申请号：NO774329

申请日：1977-12-15

Applicant: IBM

Inventor： HALLET MICHAEL HENRY ,  SOWTER BRIAN RAYMOND ,  HENEGHAN MICHAEL JAMES

IPC: G09G1/00 ,  G09G1/04 ,  G06F3/153 ,  G09G1/28 ,  G09G5/30 ,  H04N3/23 ,  H04N9/28 ,  H01J29/56

Abstract: A three color gun cathode ray tube has convergence correction signals derived from digital signals stored in a digital data store. The screen of the tube is divided into a plurality of areas and a digital correction signal derived for each area. The system is arranged so that when the three beams are scanning a particular area the digital correction signal associated with that area is read out from the digital store, passed through a digital to analog converter and then applied to the convergence coils of the tube.

公开(公告)号：FI773913A

公开(公告)日：1978-06-23

申请号：FI773913

申请日：1977-12-22

Applicant: IBM

Inventor： HALLET MICHAEL HENRY ,  HENEGHAN MICHAEL JAMES ,  SOWTER BRIAN RAYMOND

IPC: G09G1/00 ,  G06F3/153 ,  G09G1/04 ,  G09G1/28 ,  G09G5/30 ,  H04N3/23 ,  H04N9/28 ,  H04N

Abstract: A three color gun cathode ray tube has convergence correction signals derived from digital signals stored in a digital data store. The screen of the tube is divided into a plurality of areas and a digital correction signal derived for each area. The system is arranged so that when the three beams are scanning a particular area the digital correction signal associated with that area is read out from the digital store, passed through a digital to analog converter and then applied to the convergence coils of the tube.