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公开(公告)号：AU509002B2
公开(公告)日：1980-04-17
申请号：AU3165877
申请日：1977-12-16
Applicant: IBM
Inventor： HALLETT M H , SOWTER B R , HENEGHAN M J
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.
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公开(公告)号：SE437596B
公开(公告)日：1985-03-04
申请号：SE7713738
申请日：1977-12-05
Applicant: IBM
Inventor： HALLET M H , SOWTER B R
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.
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Patent Agency Ranking
公开(公告)号：AU4730779A
公开(公告)日：1980-11-27
申请号：AU4730779
申请日：1979-05-24
Applicant: IBM
Inventor： ROE D , SOWTER B R
Abstract: Mixed color effects in a character graphics display system are achieved by providing font characters comprising several character cells with different patterns which can selectively be read simultaneously to different color registers, thereby determining the color in which each character cell is to be displayed. The system also provides characters comprising only a single character cell which can selectively be directed to any of the color registers. A control system interprets color bits in a control word in accordance with the type of character being accessed.
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公开(公告)号：DK571477A
公开(公告)日：1978-06-23
申请号：DK571477
申请日：1977-12-21
Applicant: IBM
Inventor： HALLETT M H , SOWTER B R
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.
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公开(公告)号：BE860552A
公开(公告)日：1978-03-01
申请号：BE182407
申请日：1977-11-07
Applicant: IBM
Inventor： SOWTER B R , HALLETT M H , HENEGHAN M J
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.
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公开(公告)号：SE7809228L
公开(公告)日：1979-03-16
申请号：SE7809228
申请日：1978-09-01
Applicant: IBM
Inventor： SOWTER B R
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