公开(公告)号：FI60086C

公开(公告)日：1981-11-10

申请号：FI1573

申请日：1973-01-04

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

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

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.

公开(公告)号：FI60085C

公开(公告)日：1981-11-10

申请号：FI752722

申请日：1975-09-29

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

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

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：FI59182B

公开(公告)日：1981-02-27

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：AU5344479A

公开(公告)日：1980-06-19

申请号：AU5344479

申请日：1979-12-04

Applicant: RCA CORP

Inventor： CAMPBELL FRANCIS JOSEPH ,  BARKOW WILLIAM HENRY

IPC: H01J29/76 ,  H01J9/236

公开(公告)号：DE2949780A1

公开(公告)日：1980-06-12

申请号：DE2949780

申请日：1979-12-11

Applicant: RCA CORP

Inventor： CAMPBELL FRANCIS JOSEPH ,  BARKOW WILLIAM HENRY

IPC: H01J29/76 ,  H04N5/64 ,  H04N3/16

公开(公告)号：FI783240A

公开(公告)日：1978-10-24

申请号：FI783240

申请日：1978-10-24

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

IPC: H01J29/76 ,  H04N20060101 ,  H04N

公开(公告)号：NO137167C

公开(公告)日：1978-01-11

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.

公开(公告)号：AU8112975A

公开(公告)日：1976-12-02

申请号：AU8112975

申请日：1975-05-14

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  GROSS JOSEF

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：ZA757307B

公开(公告)日：1976-11-24

申请号：ZA757307

申请日：1975-11-20

Applicant: RCA CORP

Inventor： BARKOW WILLIAM HENRY ,  WILLIAM HENRY BARKOW

IPC: G06G7/28 ,  H03K6/04 ,  H03K4/04 ,  H03K6/00 ,  H04N9/28 ,  H04N

Abstract: A sawtooth waveform is coupled to the input terminals of a modified bridge circuit for producing a parabolic current through a load coupled to the output terminals of the bridge. At least one leg of the bridge includes at least two unidirectional conducting devices and means for biasing at least one of the devices for conducting before the other for altering the current slope through the load for more closely approximating a parabolic current waveform.

公开(公告)号：FI752722A

公开(公告)日：1976-04-05

申请号：FI752722

申请日：1975-09-29

Applicant: RCA CORP

Inventor： GROSS JOSEF ,  BARKOW WILLIAM HENRY

IPC: H01J3/02 ,  H01J29/50 ,  H01J29/52 ,  H01J29/76 ,  H01J31/20 ,  H01J

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.