公开(公告)号：FI854825A

公开(公告)日：1986-06-14

申请号：FI854825

申请日：1985-12-05

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/23 ,  H03K4/90 ,  H04N3/233 ,  H04N

Abstract: A linearity correction circuit for correcting asymmetrical linearity errors of the line deflection current includes a resonant capacitor coupled to a first inductor for forming a resonant circuit having a resonant frequency greater than or equal to the deflection retrace frequency. A controllable switch coupled to the resonant circuit and to the deflection trace capacitor becomes conductive at the beginning of retrace to generate an oscillatory current pulse in the resonant circuit that removes a predetermined amount of charge from the trace capacitor during retrace. A second, relatively large valued inductor is coupled to the line deflection winding and is responsive to the deflection retrace pulse voltage for supplying during the trace interval a linearity correction current to the trace capacitor via the resonant capacitor.

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

Inventor： MCDONALD JAMES ALEXANDER ,  WAYBRIGHT GEORGE CLEVELAND ,  WILLIS DONALD HENRY ,  SUTHERLAND II HUGH FERRAR ,  LUZ DAVID WARREN ,  HAFERL PETER EDUARD

IPC: H04N3/23 ,  H01J29/56 ,  H04N3/233 ,  H04N

公开(公告)号：GB2118008B

公开(公告)日：1985-12-04

申请号：GB8302035

申请日：1983-01-25

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N5/63 ,  H04B1/034 ,  H04N3/18 ,  H04Q9/00 ,  H03K4/62

Abstract: A deflection generator (21) of a television receiver includes a trace switch (27) that during normal mode of operation is switched at a deflection rate to generate scanning current in a deflection winding (LH). The deflection generator includes a retrace capacitance (CR) for forming a retrace resonant circuit with the deflection winding to produce a retrace pulse voltage. A load circuit (at Vb) is coupled to the deflection generator and is energized by the retrace pulse voltage during normal operation. A remote control circuit (30) develops a remote ON-OFF command signal. A standby circuit (Q2) is series coupled with the deflection generator (21) and is responsive to a remote ON-OFF command signal for producing substantially a short circuit through the trace switch (27) upon receipt of the OFF-state of the command signal. The retrace pulse voltage then collapses and places the load circuit in a standby mode of operation.

公开(公告)号：FI854762A0

公开(公告)日：1985-12-02

申请号：FI854762

申请日：1985-12-02

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/23 ,  G09G20060101 ,  H01J29/56 ,  H04N20060101 ,  H04N3/233 ,  H04N

Abstract: A field deflection amplifier (21) generates a field deflection current in a field deflection winding (Lv). An LC resonant circuit (22) is coupled to the deflection winding (Lv) and to an output switching amplifier (Q4). A control circuit (26) switches conductive states of the amplifier (21) at a line rate, to excite the LC resonant circuit (22) into providing a line rate correction current for the field deflection winding (Lv). The control circuit (26) varies the modulation envelope of the field deflection current at a field rate in a generally sawtooth manner to provide north-south pincushion correction. When used in conjunction with raster scanning in a square-planar picture tube (SP), the modulation envelope is nonlinearly waveshaped to take into account the aspherical nature of the picture tube faceplate.

公开(公告)号：FI854762A

公开(公告)日：1985-12-02

申请号：FI854762

申请日：1985-12-02

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/23 ,  G09G20060101 ,  H01J29/56 ,  H04N20060101 ,  H04N3/233 ,  H04N

Abstract: A field deflection amplifier (21) generates a field deflection current in a field deflection winding (Lv). An LC resonant circuit (22) is coupled to the deflection winding (Lv) and to an output switching amplifier (Q4). A control circuit (26) switches conductive states of the amplifier (21) at a line rate, to excite the LC resonant circuit (22) into providing a line rate correction current for the field deflection winding (Lv). The control circuit (26) varies the modulation envelope of the field deflection current at a field rate in a generally sawtooth manner to provide north-south pincushion correction. When used in conjunction with raster scanning in a square-planar picture tube (SP), the modulation envelope is nonlinearly waveshaped to take into account the aspherical nature of the picture tube faceplate.

公开(公告)号：FR2556542A1

公开(公告)日：1985-06-14

申请号：FR8418913

申请日：1984-12-11

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: C01B33/00 ,  B01J20/10 ,  B01J21/08 ,  B01J29/04 ,  B01J29/86 ,  C01B33/02 ,  C01B33/12 ,  C01B33/20 ,  C01B35/10 ,  C01B35/12 ,  C01B39/00 ,  C01B39/04 ,  C01B39/08 ,  C01B39/12 ,  C07B61/00 ,  C07C1/00 ,  C07C1/20 ,  C07C2/66 ,  C07C2/86 ,  C07C15/067 ,  C07C27/00 ,  C07C29/10 ,  C07C29/128 ,  C07C31/04 ,  C07C67/00 ,  H04N3/16 ,  H04N3/185 ,  H04N3/22 ,  H04N3/223 ,  H04N3/18

Abstract: An energizing voltage is series coupled with a diode, an inductor, a flyback transformer primary winding and an input terminal of a deflection circuit. During trace, the diode is forward biased causing a voltage to be developed across and an input current to flow in the inductor. During retrace, opposite polarity retrace voltage commutates off the diode and decouples the input terminal from the energizing voltage at a varied instant within retrace, in accordance with the amplitude of the input current. The amplitude of the input current is related to the ultor load current. A voltage that is indicative of the input current is developed across a capacitor. A DC voltage between one plate of the capacitor and a reference conductor controls the deflection current in the deflection winding such that variations in the ultor voltage produce the same sense variations in the DC voltage that is supplied by the capacitor for maintaining a substantially constant raster width.

公开(公告)号：DE3442818A1

公开(公告)日：1985-06-05

申请号：DE3442818

申请日：1984-11-23

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/233 ,  H04N3/22

Abstract: An inside-outside pincushion correction circuit includes an arrangement of first and second branches that provide a pair of current paths to a deflection current that flows in a deflection winding. The first branch includes a modulation inductance and the second branch includes a modulation capacitance that is coupled across the modulation inductance by a switch at a controllable time during the retrace interval. The controllable time varies in a vertical rate parabolic manner to provide deflection current modulation to correct inside and outside pincushion distortions. Variation of the retrace interval associated with the modulation inductance are compensated by offsetting variations produced by the retrace capacitance.

公开(公告)号：FI844513L

公开(公告)日：1985-05-26

申请号：FI844513

申请日：1984-11-16

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/233 ,  H04N

Abstract: An inside-outside pincushion correction circuit includes an arrangement of first and second branches that provide a pair of current paths to a deflection current that flows in a deflection winding. The first branch includes a modulation inductance and the second branch includes a modulation capacitance that is coupled across the modulation inductance by a switch at a controllable time during the retrace interval. The controllable time varies in a vertical rate parabolic manner to provide deflection current modulation to correct inside and outside pincushion distortions. Variation of the retrace interval associated with the modulation inductance are compensated by offsetting variations produced by the retrace capacitance.

公开(公告)号：IT8423703D0

公开(公告)日：1984-11-23

申请号：IT2370384

申请日：1984-11-23

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/233

Abstract: An inside-outside pincushion correction circuit includes an arrangement of first and second branches that provide a pair of current paths to a deflection current that flows in a deflection winding. The first branch includes a modulation inductance and the second branch includes a modulation capacitance that is coupled across the modulation inductance by a switch at a controllable time during the retrace interval. The controllable time varies in a vertical rate parabolic manner to provide deflection current modulation to correct inside and outside pincushion distortions. Variation of the retrace interval associated with the modulation inductance are compensated by offsetting variations produced by the retrace capacitance.

公开(公告)号：DK555884D0

公开(公告)日：1984-11-22

申请号：DK555884

申请日：1984-11-22

Applicant: RCA CORP

Inventor： HAFERL PETER EDUARD

IPC: H04N3/16 ,  G09G1/04 ,  H04N3/22 ,  H04N3/223 ,  H04N3/23 ,  H04N3/233 ,  H04N

Abstract: In a deflection circuit, a flyback transformer and a retrace resonant circuit that includes a deflection winding are mutually coupled by a relatively small capacitor during the retrace interval so as to reduce transient distortions that may be caused by a sudden high beam current change. East-west modulation is provided to the deflection circuit output stage via an impedance having a relatively large value at the retrace frequency. A resonant circuit that includes the deflection winding and the flyback transformer is tuned to the retrace frequency. Synchronization information of the current through the deflection winding may be derived from a winding of the flyback transformer.