公开(公告)号：DE3445518A1

公开(公告)日：1985-06-20

申请号：DE3445518

申请日：1984-12-13

Applicant: RCA CORP

Inventor： CHEN HSING-YAO ,  HUGHES RICHARD HENRY

IPC: H01J29/51 ,  H01J29/70 ,  H01J29/50 ,  H01J29/76

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：FR2521347A1

公开(公告)日：1983-08-12

申请号：FR8301927

申请日：1983-02-08

Applicant: RCA CORP

Inventor： ASSIL NAIM ZAKI ,  HUGHES RICHARD HENRY

IPC: H01J29/74 ,  H01J29/50 ,  H01J29/51

公开(公告)号：DE3225633A1

公开(公告)日：1983-03-17

申请号：DE3225633

申请日：1982-07-08

Applicant: RCA CORP

Inventor： MORRELL ALBERT MAXWELL ,  HUGHES RICHARD HENRY ,  BARKOW WILLIAM HENRY

IPC: H01J29/50 ,  H01J29/51 ,  H01J29/62 ,  H01J31/20 ,  H01J29/76 ,  H04N9/20

Abstract: The assembly (Fig. 3) has a trio of inline cathodes (21), a first grid (G1, 23) positioned adjacent the cathodes and a second grid (G2, 25) positioned between the first grid and a first focussing electrode (G3, 27). Each grid and electrode has a trio of inline apertures aligned with the cathodes. A common, assymmetric focussing lens is, in use, established between the first focussing electrode (G3) and a second focussing electrode (G4, 29). The lens has a maximum transverse dimension in a first direction parallel to the plane of the inline apertures greater than its maximum transverse dimension in a second orthogonal direction. In order that the cross-section of each electron beam has a greater dimension in the first direction than in the second direction at the beam- entrance of the lens, there is a slotted structure (Fig. 7, 68) associated with said first (23) grid interposing a rectangular slot (68) between each aperture (64) of the first grid and the aligned aperture of the second grid. The long dimension of the rectangle is in the second direction in the first grid (23).

公开(公告)号：AU8556582A

公开(公告)日：1983-01-13

申请号：AU8556582

申请日：1982-07-02

Applicant: RCA CORP

Inventor： MORRELL ALBERT MAXWELL ,  HUGHES RICHARD HENRY ,  BARKOW WILLIAM HENRY

IPC: H01J29/50 ,  H01J29/51 ,  H01J29/62 ,  H01J29/56

Abstract: The assembly (Fig. 3) has a trio of inline cathodes (21), a first grid (G1, 23) positioned adjacent the cathodes and a second grid (G2, 25) positioned between the first grid and a first focussing electrode (G3, 27). Each grid and electrode has a trio of inline apertures aligned with the cathodes. A common, assymmetric focussing lens is, in use, established between the first focussing electrode (G3) and a second focussing electrode (G4, 29). The lens has a maximum transverse dimension in a first direction parallel to the plane of the inline apertures greater than its maximum transverse dimension in a second orthogonal direction. In order that the cross-section of each electron beam has a greater dimension in the first direction than in the second direction at the beam- entrance of the lens, there is a slotted structure (Fig. 7, 68) associated with said first (23) grid interposing a rectangular slot (68) between each aperture (64) of the first grid and the aligned aperture of the second grid. The long dimension of the rectangle is in the second direction in the first grid (23).

公开(公告)号：BR8106792A

公开(公告)日：1982-07-06

申请号：BR8106792

申请日：1981-10-22

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY ,  MARKS BRUCE GEORGE

IPC: H01J29/48 ,  H01J29/50 ,  H01J29/62 ,  H01J29/46

Abstract: The present invention relates to an improvement in a color picture tube having an inline electron gun, for generating and directing a plurality of electron beams along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The improvement comprises a change in the two spaced gun electrodes that form the main focus lens. Each electrode includes a plurality of apertures therein equal to the number of electron beams. Each electrode also includes a peripheral rim with the peripheral rims of the two electrodes facing each other. The apertured portion of each electrode is located within a recess set back from the rim. The recess has substantially straight wall sections parallel to the paths of the electron beams.

公开(公告)号：FI822370A0

公开(公告)日：1982-07-02

申请号：FI822370

申请日：1982-07-02

Applicant: RCA CORP

Inventor： MORRELL ALBERT MAXWELL ,  HUGHES RICHARD HENRY ,  BARKOW WILLIAM HENRY

IPC: H01J29/50 ,  H01J29/51 ,  H01J29/62 ,  H04N

Abstract: The assembly (Fig. 3) has a trio of inline cathodes (21), a first grid (G1, 23) positioned adjacent the cathodes and a second grid (G2, 25) positioned between the first grid and a first focussing electrode (G3, 27). Each grid and electrode has a trio of inline apertures aligned with the cathodes. A common, assymmetric focussing lens is, in use, established between the first focussing electrode (G3) and a second focussing electrode (G4, 29). The lens has a maximum transverse dimension in a first direction parallel to the plane of the inline apertures greater than its maximum transverse dimension in a second orthogonal direction. In order that the cross-section of each electron beam has a greater dimension in the first direction than in the second direction at the beam- entrance of the lens, there is a slotted structure (Fig. 7, 68) associated with said first (23) grid interposing a rectangular slot (68) between each aperture (64) of the first grid and the aligned aperture of the second grid. The long dimension of the rectangle is in the second direction in the first grid (23).

公开(公告)号：DE3143022A1

公开(公告)日：1982-06-03

申请号：DE3143022

申请日：1981-10-29

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY ,  MARKS BRUCE GEORGE

IPC: H01J29/48 ,  H01J29/50 ,  H01J29/62

Abstract: The present invention relates to an improvement in a color picture tube having an inline electron gun, for generating and directing a plurality of electron beams along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The improvement comprises a change in the two spaced gun electrodes that form the main focus lens. Each electrode includes a plurality of apertures therein equal to the number of electron beams. Each electrode also includes a peripheral rim with the peripheral rims of the two electrodes facing each other. The apertured portion of each electrode is located within a recess set back from the rim. The recess has substantially straight wall sections parallel to the paths of the electron beams.

公开(公告)号：IT8124406D0

公开(公告)日：1981-10-08

申请号：IT2440681

申请日：1981-10-08

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY ,  MARKS BRUCE GEORGE

IPC: H01J29/48 ,  H01J29/50 ,  H01J29/62 ,  H04N

Abstract: The present invention relates to an improvement in a color picture tube having an inline electron gun, for generating and directing a plurality of electron beams along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The improvement comprises a change in the two spaced gun electrodes that form the main focus lens. Each electrode includes a plurality of apertures therein equal to the number of electron beams. Each electrode also includes a peripheral rim with the peripheral rims of the two electrodes facing each other. The apertured portion of each electrode is located within a recess set back from the rim. The recess has substantially straight wall sections parallel to the paths of the electron beams.

公开(公告)号：FR2477316A1

公开(公告)日：1981-09-04

申请号：FR8103504

申请日：1981-02-23

Applicant: RCA CORP

Inventor： HUGHES RICHARD HENRY

IPC: H01J29/50 ,  H01J31/20

公开(公告)号：DE2938769A1

公开(公告)日：1980-03-27

申请号：DE2938769

申请日：1979-09-25

Applicant: RCA CORP

Inventor： CHEN HSING-YAO ,  HUGHES RICHARD HENRY

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

Abstract: 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 2-5 times its depth, creates an astigmatic 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.