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公开(公告)号：JPS61502442A
公开(公告)日：1986-10-23
申请号：JP50284585
申请日：1985-06-10
Applicant: RCA CORP
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公开(公告)号：DK65086A
公开(公告)日：1986-02-11
申请号：DK65086
申请日：1986-02-11
Applicant: RCA CORP
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公开(公告)号：FI871534A
公开(公告)日：1987-10-16
申请号：FI871534
申请日：1987-04-08
Applicant: RCA CORP
Inventor： SUTHERLAND II HUGH FERRAR
Abstract: A vertical deflection amplifier (20) of a video display apparatus includes first (Q1) and second (Q2) transistor amplifier output stages arranged in a totem-pole, push-pull configuration. A vertical-deflection winding (LV) is coupled to the output stages at a deflection amplifier output terminal (22). An S-capacitor (C1) is coupled to the deflection winding (LV) at a second terminal (21) remote from the output terminal (22). A source (23) of deflection rate signals is coupled to the deflection amplifier (20) for generating a deflection current (iv) in the deflection winding (LV). A base current generating circuit (40) is coupled to one (Q1) of the transistor amplifier output stages for providing base current (i1) thereto. The S-capacitor voltage (V1) is applied to the base current generating circuit (40) for enabling conduction of base current (i1) in the one amplifier output stage (Q1). When the video display apparatus is first turned on, the initially discharged S-capacitor (C1) is slowly charged from a DC voltage supply (+30V) to delay generation of vertical def lection past completion of picture tube degaussing. A DC power supply (16) upon energization in response to a switch (15) produces a DC level (+DC2) sufficient for operating the deflection amplifier prior to the conclusion of degaussing.
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Patent Agency Ranking
公开(公告)号：FI871534A0
公开(公告)日：1987-04-08
申请号：FI871534
申请日：1987-04-08
Applicant: RCA CORP
Inventor： SUTHERLAND II HUGH FERRAR
Abstract: A vertical deflection amplifier (20) of a video display apparatus includes first (Q1) and second (Q2) transistor amplifier output stages arranged in a totem-pole, push-pull configuration. A vertical-deflection winding (LV) is coupled to the output stages at a deflection amplifier output terminal (22). An S-capacitor (C1) is coupled to the deflection winding (LV) at a second terminal (21) remote from the output terminal (22). A source (23) of deflection rate signals is coupled to the deflection amplifier (20) for generating a deflection current (iv) in the deflection winding (LV). A base current generating circuit (40) is coupled to one (Q1) of the transistor amplifier output stages for providing base current (i1) thereto. The S-capacitor voltage (V1) is applied to the base current generating circuit (40) for enabling conduction of base current (i1) in the one amplifier output stage (Q1). When the video display apparatus is first turned on, the initially discharged S-capacitor (C1) is slowly charged from a DC voltage supply (+30V) to delay generation of vertical def lection past completion of picture tube degaussing. A DC power supply (16) upon energization in response to a switch (15) produces a DC level (+DC2) sufficient for operating the deflection amplifier prior to the conclusion of degaussing.
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公开(公告)号：FI860558A
公开(公告)日：1986-02-07
申请号：FI860558
申请日：1986-02-07
Applicant: RCA CORP
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公开(公告)号：FI860558A0
公开(公告)日：1986-02-07
申请号：FI860558
申请日：1986-02-07
Applicant: RCA CORP
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公开(公告)号：CA1240402A
公开(公告)日：1988-08-09
申请号：CA483692
申请日：1985-06-11
Applicant: RCA CORP
Inventor： MCDONALD JAMES ALEXANDER , WAYBRIGHT GEORGE CLEVELAND , WILLIS DONALD HENRY , SUTHERLAND II HUGH FERRAR , LUZ DAVID WARREN , HAFERL PETER EDUARD
Abstract: Line and field deflection circuits generate line and field deflection currents in respective line and field deflection windings to scan a raster on the phosphor screen of a square-planar picture tube having an aspherical faceplate. The asphericity of the faceplate subjects the scanned raster to gullwing distortion. A gullwing distortion correction circuit is responsive to signals repeating at line and field rates, respectively, for modulating the field deflection current during a line deflection period within the field deflection trace interval in a manner that corrects gullwing distortion of a corresponding raster scan line.
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公开(公告)号：DK65086D0
公开(公告)日：1986-02-11
申请号：DK65086
申请日：1986-02-11
Applicant: RCA CORP
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