公开(公告)号：KR820000704B1

公开(公告)日：1982-04-28

申请号：KR790001392

申请日：1979-05-01

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/48 ,  H01J29/50 ,  H01J29/51 ,  H01J29/56 ,  H04N9/29

Abstract: Different paster sizes(coma) are corrected in a color picture tube with inline electron gun 26 by first means for weakening the effect of a portion of the horizontal magnetic deflection field on the center electron beam including elongated magnetic members 47, 47, located between the outer beams B and R and the center beam G, with the direction of elongation being perpendicular to the plane of the electron beam paths and by second means for weakening the effect of portions of both deflection fields on the two outer beams including magnetic shield members 46, 46 completely surrounding each of the outer beam paths.

公开(公告)号：KR850000565B1

公开(公告)日：1985-04-26

申请号：KR810001010

申请日：1981-03-27

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/46 ,  H01J29/50 ,  H01J29/51 ,  H01J29/56

公开(公告)号：US2991381A

公开(公告)日：1961-07-04

申请号：US78539859

申请日：1959-01-07

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/70

CPC classification number: H01J29/705

公开(公告)号：US3375389A

公开(公告)日：1968-03-26

申请号：US43959965

申请日：1965-03-15

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/70

CPC classification number: H01J29/703

公开(公告)号：US2847598A

公开(公告)日：1958-08-12

申请号：US57843456

申请日：1956-04-16

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/70

CPC classification number: H01J29/701

公开(公告)号：US2782333A

公开(公告)日：1957-02-19

申请号：US45066154

申请日：1954-08-18

Applicant: RCA CORP

Inventor： BENWAY ROBERT E ,  HUGHES RICHARD H

IPC: H01J31/20

CPC classification number: H01J31/205

公开(公告)号：US3268753A

公开(公告)日：1966-08-23

申请号：US50372565

申请日：1965-10-23

Applicant: RCA CORP

Inventor： HUGHES RICHARD H

IPC: H01J29/70

CPC classification number: H01J29/701

公开(公告)号：US2793312A

公开(公告)日：1957-05-21

申请号：US32784852

申请日：1952-12-24

Applicant: RCA CORP

Inventor： HANGEN NEVIN R ,  HUGHES RICHARD H

IPC: H01J29/82

CPC classification number: H01J29/82

公开(公告)号：PL250904A1

公开(公告)日：1985-09-10

申请号：PL25090484

申请日：1984-12-13

Applicant: RCA CORP

Inventor： CHEN HSING-YAO ,  HUGHES RICHARD H

IPC: H01J29/51 ,  H01J29/70 ,  H01J

Abstract: The present invention provides an improvement in a color picture tube having an inline electron gun for generating and directing three inline electron beams, comprising a center beam and two outer beams, along initially coplanar paths toward a screen of the tube. The beams pass through a deflection zone adapted to have two orthogonal magnetic deflection fields established therein. A first of the fields causes deflection of the beams perpendicular to the inline direction of the beams, and a second of the fields causes deflection parallel to the inline direction of the beams. The improvement comprises the electron gun including four magnetically permeable members located near the exit of the electron gun in a fringe portion of said deflection zone. A first and a second of the members are located between the center beam path and a first and second outer beam path, respectively. A third and a fourth of said members are spaced from the first and second members, respectively, and are located on the outside of the respective outer beam paths. The first and third members and the second and fourth members have means for bypassing a part of the fringe portion of the first of the two orthogonal magnetic deflection fields, at the members, around the respective outer beam paths, while allowing another part of the same fringe portion, at the members, to pass through the respective outer beam paths. The first and second members have means for bypassing a part of the fringe portion of the first of the two orthogonal deflection fields, at the members, around the center beam path, while allowing another part of the same fringe portion, at the members, to pass through the center beam path.

公开(公告)号：CA1138518A

公开(公告)日：1982-12-28

申请号：CA335765

申请日：1979-09-17

Applicant: RCA CORP

Inventor： CHEN HSING-YAO ,  HUGHES RICHARD H

IPC: H01J29/50 ,  H01J29/48 ,  H01J29/51 ,  H01J29/56

Abstract: RCA 73,250 The gun, for use in a television picture tube, comprises a cathode, an apertured control grid, and an apertured screen grid aligned in the order named. The screen grid aperture comprises a rectangular slot portion facing the control grid and a circular portion facing away from the control grid. The slot portion of the aperture, which has a width 2-to-5 times its depth, creates an astiomatic field that produces underconvergence of the electron beam in the vertical plane only, whereby to avoid and/or compensate for vertical flare distortion of the beam spot at off-center positions on the image screen.