-
公开(公告)号：CS936084A2
公开(公告)日：1987-12-17
申请号：CS936084
申请日：1984-12-05
Applicant: RCA CORP
Inventor： CHEN HSING YAO , MUGNES RICHARD H
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.
-
Patent Agency Ranking
公开(公告)号：IT8419276D0
公开(公告)日：1984-01-23
申请号：IT1927684
申请日：1984-01-23
Applicant: RCA CORP
Inventor： CHEN HSING YAO
Abstract: An inline electron gun in a color picture tube is improved by the addition of two slots that are spaced sufficiently close to and inward from the two apertures in a portion of the screen grid electrode facing an accelerating and focusing electrode. The slots cause a distortion of the electrostatic field formed between the two electrodes at the two apertures. The field distortion compensates for an opposite distortion within the main lens of the electron gun.
-
公开(公告)号：IT8222268D0
公开(公告)日：1982-07-06
申请号：IT2226882
申请日：1982-07-06
Applicant: RCA CORP
Inventor： CHEN HSING YAO , HUGHES RICHARD HENRY
Abstract: A color CRT has an inline electron gun for generating and directing three electron beams toward a screen, the gun including a main focus lens formed by two spaced electrodes (40, 42) each having three separate inline apertures (58,60,62;64,66,68) and a peripheral rim (70,72), the apertured portion of each electrode being within a recess (54,56) set back from the rim, 15 wherein the main focus lens electrode (42) closest to the screen includes a slot (95) e.g. formed by two strips (96,98), on the side facing the screen, the slot extending in the direction of the three electron beam paths and includes means for providing a weaker stigmator effect on the two side beams than on the center beam. As shown in Figure 5 the ends of the strips (96, 98) may be tapered, or curved or the strips shortened, to provide the weaker stigmator effect. Alternatively, Figures 9 and 10 (not shown), the slot is dogboned in shape and located in a bracket (102) attached to an apertured plate (52), in turn attached to the screen side of the main focus lens electrode closest to the screen.
-
公开(公告)号：CS8409360A2
公开(公告)日：1987-12-17
申请号：CS936084
申请日：1984-12-05
Applicant: RCA CORP
Inventor： CHEN HSING YAO , MUGNES RICHARD H
CPC classification number: H01J29/707
-
公开(公告)号：BR8203963A
公开(公告)日：1983-06-28
申请号：BR8203963
申请日：1982-07-08
Applicant: RCA CORP
Inventor： CHEN HSING YAO , HUGHES RICHARD HENRY
Abstract: A color CRT has an inline electron gun for generating and directing three electron beams toward a screen, the gun including a main focus lens formed by two spaced electrodes (40, 42) each having three separate inline apertures (58,60,62;64,66,68) and a peripheral rim (70,72), the apertured portion of each electrode being within a recess (54,56) set back from the rim, 15 wherein the main focus lens electrode (42) closest to the screen includes a slot (95) e.g. formed by two strips (96,98), on the side facing the screen, the slot extending in the direction of the three electron beam paths and includes means for providing a weaker stigmator effect on the two side beams than on the center beam. As shown in Figure 5 the ends of the strips (96, 98) may be tapered, or curved or the strips shortened, to provide the weaker stigmator effect. Alternatively, Figures 9 and 10 (not shown), the slot is dogboned in shape and located in a bracket (102) attached to an apertured plate (52), in turn attached to the screen side of the main focus lens electrode closest to the screen.
-
公开(公告)号：IT8519108D0
公开(公告)日：1985-01-15
申请号：IT1910885
申请日：1985-01-15
Applicant: RCA CORP
Inventor： CHEN HSING YAO
Abstract: An improved color picture tube has an inline electron gun for generating and directing three electron beams, a center beam and two side beams, along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The main focus lens is formed by two spaced electrode members, each having three separate inline apertures therein, a center aperture and two side apertures. The improvement comprises each of the apertures in each of the focus lens electrodes having a shape that distorts a portion of the focus lens thereat, to at least partially compensate for an astigmatic effect within the tube that acts on an associated electron beam. The side apertures in both of the electrodes are nonsymmetrical about axes that pass through the respective side apertures and are perpendicular to the initial coplanar paths of the electron beams.
-
-
-
-
-
Search Results
6
records
(took 0.019 seconds)
