公开(公告)号：FR2484696A1

公开(公告)日：1981-12-18

申请号：FR8109533

申请日：1981-05-13

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF

IPC: H01J29/56 ,  H01J29/76 ,  H04N9/28 ,  H01J29/51

Abstract: A self-converging deflection yoke having toroidally-wound vertical deflection coils incorporates a pair of magnetically permeable field formers mounted on either side of the yoke. The field formers shunt a portion of the external field flux to the vicinity of the electron gun assembly where they form a pincushion-shaped field which aids in vertical coma correction. In one embodiment, a yoke comprising planar-wound vertical coils incorporates both coma-correcting rear field formers and a pair of front crossarm assemblies for providing side-pincushion correction. The resultant yoke provides covergence of electron beams free of coma and side-pincushion distortion with reduced sensitivity to transverse motion. In another embodiment, similar results are obtained without the front crossarms by vertical deflection coil having a nonradial winding configuration.

公开(公告)号：FI811406L

公开(公告)日：1981-11-15

申请号：FI811406

申请日：1981-05-07

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF

IPC: H01J29/56 ,  H01J29/76 ,  H04N9/28 ,  H01J

Abstract: A self-converging deflection yoke having toroidally-wound vertical deflection coils incorporates a pair of magnetically permeable field formers mounted on either side of the yoke. The field formers shunt a portion of the external field flux to the vicinity of the electron gun assembly where they form a pincushion-shaped field which aids in vertical coma correction. In one embodiment, a yoke comprising planar-wound vertical coils incorporates both coma-correcting rear field formers and a pair of front crossarm assemblies for providing side-pincushion correction. The resultant yoke provides covergence of electron beams free of coma and side-pincushion distortion with reduced sensitivity to transverse motion. In another embodiment, similar results are obtained without the front crossarms by vertical deflection coil having a nonradial winding configuration.

公开(公告)号：FR2482365A1

公开(公告)日：1981-11-13

申请号：FR8018530

申请日：1980-08-26

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

IPC: H01J29/76 ,  H04N3/18 ,  H04N9/28 ,  H01J29/51

公开(公告)号：FI59182C

公开(公告)日：1981-06-10

申请号：FI1473

申请日：1973-01-04

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF

IPC: H01J29/70 ,  H01J29/76 ,  H04N9/28 ,  H04N9/285

Abstract: A deflection yoke for a television picture tube utilizing coplanar horizontal in-line electron guns includes vertical and horizontal coil windings selected for producing positive vertical isotropic astigmatism and negative horizontal isotropic astigmatism which underconverges the electron beams along the vertical deflection axis such that the beams are substantially converged at all points on a scanned raster of the picture tube. The desired convergence characteristics are achieved by winding the vertical and horizontal coil conductors such that the conductor distribution in each quadrant of a cross-section of the yoke is least in a region between 25 DEG and 45 DEG measured from the vertical deflection axis of the yoke.

公开(公告)号：FI58232B

公开(公告)日：1980-08-29

申请号：FI1673

申请日：1973-01-04

Applicant: RCA CORP

Inventor： MORRELL ALBERT MAXWELL ,  BARKOW WILLIAM HENRY ,  GROSS JOSEF

IPC: H04N9/16 ,  H01J29/50 ,  H01J29/76

Abstract: 1385745 Colour television tubes RCA CORPORATION 1 May 1972 [14 Jan 1972] 20047/72 Heading H1D A colour television tube of the shadow mask type using three co-planar beams, is provided with a deflection yoke adapted to produce a pin cushion shaped horizontal deflecting field which causes under convergence at extreme horizontal deflection, and a barrel-shaped vertical deflecting field which causes over-convergence at extreme vertical deflection; and the electron gun is adapted to produce a spacing between the beams at the centre of the deflection yoke not greater than 0À2 inch. Dynamic convergence arrangements are then unnecessary but may be provided for larger tubes. The electron gun may comprise three individual cathodes and common G1 to G4 electrodes provided with apertures for the beams; the outer apertures of the final electrode may be surrounded by magnetically permeable material such as nickel iron to partly screen the outer beams from the deflection fields and thereby equalize the raster sizes for the three colours. The deflection yoke is as described in Specification 1385747 and is preferaby toroidal but saddle coils may be used. The shadow mask may be provided with elongate apertures, and the fluorescent screen may comprise stripes of different colours.

公开(公告)号：FI793800A

公开(公告)日：1980-06-12

申请号：FI793800

申请日：1979-12-04

Applicant: RCA CORP

Inventor： CAMPBELL FRANCIS JOSEPH ,  BARKOW WILLIAM HENRY

IPC: H01J29/76 ,  H04N

公开(公告)号：DE2941431A1

公开(公告)日：1980-04-17

申请号：DE2941431

申请日：1979-10-12

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  SHISLER ROBERT WAYNE ,  WARDELL JUN MYRON HENRY

IPC: H01J29/70 ,  H04N9/28

公开(公告)号：AU498242B2

公开(公告)日：1979-02-22

申请号：AU8112975

申请日：1975-05-14

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF NMN

IPC: H04N9/28 ,  H01J29/70 ,  H04N9/285 ,  H01J29/76

Abstract: A large-screen wide-deflection angle color picture tube utilizes three coplanar electron beams. Convergence of horizontal lines on the picture tube viewing screen is accomplished by positioning a deflection yoke exhibiting particular astigmatism characteristics relative to the electron beams of the picture tube. Convergence of vertical lines is accomplished by energizing quadrupole magnetic field producing windings disposed about the picture tube neck at a vertical scanning rate.

公开(公告)号：AU497877B2

公开(公告)日：1979-01-18

申请号：AU8526075

申请日：1975-09-29

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF

IPC: H01J3/02 ,  H01J29/50 ,  H01J29/52 ,  H01J29/76 ,  H01J31/20 ,  H01J29/51 ,  H01J29/56 ,  H01J29/58 ,  H01J29/70

Abstract: A color picture reproducing tube utilizes three coplanar electron beams. Convergence of the three beams along at least one axis is accomplished by a deflection assembly producing a magnetic deflection field with particular astigmatism characteristics which also elliptically distorts each of the three beams in a first direction. The electron gun assembly within the picture tube includes apertured electrodes which predistort the beams elliptically in a second direction orthogonal to the first direction of distortion.

公开(公告)号：NO137167B

公开(公告)日：1977-10-03

申请号：NO16473

申请日：1973-01-12

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

IPC: H01J3/02 ,  H01J29/50 ,  H01J29/51 ,  H01J29/76 ,  H01J31/20 ,  H01J29/58 ,  H04N9/28

Abstract: A color television display system is described which requires no dynamic convergence apparatus for small and medium size screen color picture tubes and which requires relatively simple dynamic convergence apparatus for large screen color picture tubes. The color picture tube includes an electron gun assembly for producing three adjacent horizontal in-line coplanar beams. The electron gun assembly includes a common three-aperture beam forming electrode for establishing precise alignment of the beams. The beams are substantially converged at all points in the scanned raster as they are deflected by a deflection yoke providing negative horizontal isotropic astigmatism and positive vertical isotropic astigmatism. The gun assembly includes magnetic shield members disposed around the two outside beam paths to shield those beams from a portion of the deflection field so that the rasters scanned by the three beams are of the same size. In addition, the color picture tube includes a faceplate having repeating groups of three different color phosphor strips and an aperture mask including a plurality of elongated slit apertures disposed adjacent the phosphor strips to enhance the light output from the picture tube.