US3548249A - Color cathode ray tube of the pluralbeam,single electron gun type - Google Patents

Color cathode ray tube of the pluralbeam,single electron gun type Download PDF

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Publication number
US3548249A
US3548249A US796838A US3548249DA US3548249A US 3548249 A US3548249 A US 3548249A US 796838 A US796838 A US 796838A US 3548249D A US3548249D A US 3548249DA US 3548249 A US3548249 A US 3548249A
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beams
deflection
screen
horizontal
yoke
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US796838A
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Susumu Yoshida
Akio Ohgoshi
Senri Miyaoka
Minoru Morio
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Sony Corp
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Sony Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/702—Convergence correction arrangements therefor
    • H01J29/705—Dynamic convergence systems

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  • a color cathode ray tube preferably of the single gun, plural beam type wherein the beams originate on a horizontal or vertical straight line and are directed into a field produced by a horizontal-vertical electromagnetic deflection yoke at predetermined incident angles to each other so as to converge at a color screen, is provided with a magnetic yoke, for example, secured to the electron beam convergence plates at the end of the electron gun so as to be disposed in the path of the leakage flux pro **d by the horizontal-vertical electromagnetic deflection yoke, and thereby impart a further vertical or horizontal deflection field to at least one of the plural beams for correcting a deviation between the positions of rasters on the color screen produced by the plural beams.
  • This invention relates generally to color picture tubes of the single-gun, plural-beam type, and particularly to tubes of that type in which the plural beams are passed through the optical center of a common electron lens by which the beams are focussed on the color phosphor screen.
  • pairs of convergence deflecting plates Arranged along such divergent paths are pairs of convergence deflecting plates having voltages applied thereacross to deflect the divergent beams substantially in the plane of origination thereof for causing all beams to converge at a point on the apertured beam selecting grid or shadow mask associated with the color screen.
  • the beams After passing between the convergence deflecting plates, the beams are acted upon by the magnetic fields resulting from the application of horizontal and vertical sweep signals to the corresponding coils of a deflection yoke, whereby the beams are made to scan the screen in the desired raster.
  • Another object is to achieve the desired registration of the rasters by subjecting one or more of the electron beams to a correction field which is not applied to the remainder of the electron beams.
  • a further object is to produce the correction field for achieving registration of the rasters by collecting leakage flux from the deflection yoke and concentrating the collected flux in a space through which one, for example, the central, electron beam passes, whereby to impart an additional deflection to the central beam.
  • a singlegun, plural-beam color picture tube as described, is provided with magnetic yoke members disposed at opposite sides of the path of the central beam, preferably at the entrance for the latter between the convergence deflecting plates, and each of the yoke members has a straight portion extending at right angles to the plane in which the beams originate and being disposed between the central beam and the adjacent side beam, with end portions provided on the ends of the straight portion and extending at substantial angles to the latter in directions away from the central beam to act as pole pieces for collecting leakage flux from the deflection yoke coil intended to deflect the beams at right angles to said plane, with the collected flux being concentrated in the space between the straight portions of the yoke members and hence acting on the central beam passing through such space.
  • FIG. 1 is a schematic horizontal cross-sectional view showing a plural-beam, single-electron gun type color cathode ray tube of the type to which the present invention can be applied;
  • FIGS. 2A and 2B are front and side views showing the mechanical arrangement of deflection yoke means applicable to the color cathode ray tube of FIG. 1;
  • FIG. 3 is a diagrammatic view illustrating the manner in which the beams are deflected and converged
  • FIG. 4 is a diagrammatic view illustrating the manner in which rasters are formed and the deviations thereof to be corrected by this invention
  • FIG. 5 is a horizontal cross-sectional view of the main portion of the color tube of FIG.l, but shown with an embodiment of the present invention applied thereto;
  • FIG. 6 is a transverse sectional view taken along line XX of the tube of FIG. 5 and
  • FIG. 7 is a diagrammatic view showing the magnetic field distribution occurring in the embodiment of the invention illustrated by FIGS. 5 and 6.
  • the single-gun plural-beam color picture tube 10 there shown may comprise a glass envelope (shown in dotted line) having a neck, and a cone extending from the neck to a color screen S provided with the usual arrays of color phosphors S S and S and with an aperture beam selecting grid or shadow mask G Disposed within the neck is a single electron gun having cathodes K K and K each of which is constituted by a beam-generating source with the respective beam-generating surfaces thereof disposed as shown in a plane which is substantially perpendicular to the axis of the electron gun.
  • the beam-generating surfaces are arranged in a straight line so that the respective beams B B and B emitted therefrom are directed in a substantially horizontal plane containing the axis of the gun, with the central beam B being coincident with such axis.
  • a first grid G is spaced from the beam-generating surfaces of cathodes K K and K and has apertures g g and g formed therein in alignment with the respective cathode beamgenerating surfaces.
  • a common grid G is spaced from the first gird G and has apertures g g and g formed therein in alignment with the respective apertures of the first grid G
  • Successively arranged in the axial direction away from the common grid G are open-ended, tubular grids or electrodes G G and G respectively, with cathodes K K and K grids G and G and electrodes G G and G being maintained in the depicted assembled positions thereof, by suitable, non-illustrated support means of an insulating material.
  • a voltage of to minus 400 v. is applied to the grid G
  • a voltage of 0 to 500 v. is applied to to the grid G
  • a voltage of 13 to 20 kv. is applied to the electrodes G and G
  • a voltage of O to 400 v. is applied to the electrode 6,, with all of these voltages being based upon the cathode voltage as a reference.
  • the voltage distributions between the respective electrodes and cathodes, and the respective lengths and diameters thereof, may be substantially identical with those of a unipotential-single beam type electron gun which is constituted by a single cathode and first and second, single-aperture grids.
  • an electron lens field will be established between grid G and the electrode G to form an auxiliary lens L as indicated in dashed lines, and an electron lens field will be established around the axis of the electrode 6,, by the electrodes G G and G to form a main lens L, again as indicated in dashed lines.
  • bias voltages of 100 v., 0 v., 300 v., 30 kv., 200 v., and v. may be applied respectively to the cathodes K K and K the first and second grids G and G and the electrodes G G and G Further included in the electron gun of FIG.
  • electron beam convergence deflecting means F which comprise shielding plates P and P disposed in the depicted spaced, relationship at opposite sides of the gun axis, and axially extending, deflector plates Q and Q which are disposed, as shown, in outwardly spaced, opposed relationship to shielding plates P and P, respectively.
  • deflector plates Q and Q may, alternatively, be somewhat curved or outwardly bowed, as is well known in the art.
  • the shielding plates P and P are equally charged and disposed so that the central electron beam B will pass substantially undeflected between the shielding plates P and P, while the deflector plates Q and Q have negative charges with respect to the plates P and P so that respective electron beams B and B will be convergently deflected as shown by the respective passages thereof between the plates P and Q and the plates P and Q. More specifically, a voltage V which is equal to the voltage applied to the electrode G may be applied to both shielding plates P and P, and a voltage V which is some 200 to 300 v.
  • this convergence deflecting voltage V which will impart the requisite convergent deflection to the respective electron beams B and B D is a static convergence voltage generating circuit which is applied between the electrode plates P and Q, and between the electrode plates P and Q.
  • the respective electron beams B B and B which emanate from the beam generating surfaces of the cathodes K K and K will pass through the respective grid apertures g g and g to be intensity modulated with what may be termed red, green, and blue intensity modulation signals applied between the cathodes and the first grid G
  • the respective electron beams will then pass through the common auxiliary lens L to cross each other at the center of the main lens L and emerge from the latter with beams B and B diverging from beam B
  • the central electron beam B will pass substantially undeflected between shielding plates P and P since the latter are at the same potential.
  • electron beam B passes between plates P and Q and electron beam B passes between plates P and Q, they will converge as a result of the convergence deflecting voltage applied therebetween.
  • the system of FIG. 1 is so arranged that the electron beams B B and B will desirably converge or cross each other at a common spot centered in an aperture between adjacent grid wires g of the beam selecting grid or mask G so as to diverge therefrom to strike the respective color phosphors of a corresponding array on screen S.
  • the color phosphor screen S is composed of a large plurality of sets or arrays of vertically extending red, green, and blue phosphor stripes or dots S S and S with each of the arrays or sets of color phosphors forming a color picture element as in a chromatron type color picture tube.
  • a common spot of beam convergence will correspond to one of the color picture elements.
  • the voltage V may also be applied to the lens electrodes G and G and to the screen S as an anode voltage in a conventional manner through a non-illustrated graphite layer which is provided on the inner surface of the cone of the tube envelope.
  • the grid wires of screen grid G may have a post-focussing voltage ranging, for example, from 6 to 7 kv. applied thereto.
  • the respective electron beams B B and B will be converged at screen grid G and will diverge therefrom in such manner that electron beam B will strike the blue phosphor S electron beam B will strike the green phosphor S and electron beam B will strike the red phosphor S of the array or set corresponding to the grid aperture at which the beams converge.
  • Electron beam scanning of the face of the color phosphor screen is elfected in a conventional manner, for example, by horizontal and vertical electromagnetic deflection means 20 indicated in broken lines.
  • Deflection means 20 may be constructed as a deflection yoke means having horizontal and vertical deflection coils wound in a saddlelike or toroidal form.
  • FIGS. 1-10 An example of a deflection yoke means capable of producing a pin-cushion shaped deflection field, and a barrel shaped vertical deflection field is shown at 20 in FIGS.
  • a deflection yoke 21 is provided on a yoke supporting annular member 24 which is enlarged at its front end in the form of a funnel.
  • a pair of vertical deflection coils V.,, and V are symmetrically wound in a toroidal form on deflection yoke 21 with respect to horizontal plane HH passing through the axis of the yoke. These vertical deflection coils are connected, for example, in series with each other.
  • the winding angle 0 at which the vertical deflection coils V and V are wound on the yoke 21 is selected to be greater than that which would produce a rectangular vertical deflection field. In the case of a uniformly distributed winding, the winding angle is set between 120 and 160.
  • a pair of saddle-shaped horizontal deflection coils H and H extend within annular member 24 and are symmetrically located with respect to horizontal plane HH. These horizontal deflection coils are connected, for example, in series with each other.
  • the left hand side effective coil portion 22L of horizontal deflection coil H and the left hand side eflective coil portion 23L of horizontal deflection coil H are disposed in contact, or in closely spaced relationship with each other.
  • the right hand side effective coil portion 22R of coil H and the right hand side effective coil portion 23R of coil H are disposed in contact, or closely spaced relationship with each other.
  • the winding angles 0;; of coil portions 22L and 23L, and of coil portions 22R and 23R are selected to be between 120 and 130.
  • the front portions of coils H and H adjacent the wide end of support 24 are constructed in the form of a Winding represented by the nth power of the cosine, or cos where n is a positive number between 2 and 7.
  • the rear portions of coils H and H are constructed in the form of a winding represented by the mth power of the cosine, or cos where m is a positive number between 1 and 3.
  • the three beams B B and B when being deflected horizontally and vertically are located in a common plane which is inclined with respect to the horizontal plane HH through an angle corresponding substantially to the angle of vertical deflection, as the beams are always arranged on a substantially horizontal line.
  • the three beams in the common plane enter into the deflection yoke means 20 at difference incident angles due to convergence means F.
  • the deflection yoke means of FIGS. 2A and 2B is not employed, there is a tendency that the three beams will cross each other at a position which is short of screen S when these beams are directed to the left or right hand side portion thereof.
  • beam B is deflected from its deflection center position D across a minimum field position corresponding to deflection center position D and B is deflected from its deflection center position D through a relatively strong portion of the pin-cushion type field.
  • the three beams can be made up to converge accurately with each other at the screen as shown by dotted lines in the drawing.
  • the de flection yoke means of FIGS. 2A and 2B is not used, the three beams tend to cross each other short of the screen at the opposite sides as in the horizontal deflection.
  • the three beams are subjected to substantially the same component of a barrel type field so as to converge with each other at screen S, since they are not vertically spaced apart from each other.
  • the horizontal deflection coils in saddle-like form can be produced as easily as if they were wound in toroidal form. Furthermore, due to the fact that the horizontal deflection frequency is sufliciently higher than the vertical deflection frequency, power consumption for the deflection may be reduced to 60% of that required by horizontal deflection coils wound in toroidal form. Likewise, the power consumption of the vertical deflection coils would be higher if they were wound in a saddle-like form than in a toroidal form. Therefore, the horizontal deflection coils should be wound in a saddle-like form,and the vertical deflection coils in a toroidal form.
  • the horizontal deflection coils in a saddle-like form, it is possible to easily change the configurations of the portion of the horizontal deflection field on the screen side and that on the electron gun side so that, for example, one of the field portions can be of the barrel type, while the other field portion is of the pin-cushion type. while the remainder of the horizontal deflection field is either a pin-cushion type or a barrel type field. This would become diflicult to achieve if the horizontal deflection coils were wound in toroidal form.
  • the vertical deflection field is of the barrel type configuration.
  • rasters L L and L resulting from the red, green, and blue beams B B and B should be located on a common horizontal line U as indicated in FIG. 4.
  • raster L resulting from side beams B and B are in registration with each other on the midpoint of horizontal line U, raster L extending through the midpoint, tends to be slightly lowered on the right hand side.
  • Raster L also tends to be lowered at the left hand side, and raster L resulting from center beam B tends to be shifted closer to the center of screen S than rasters L and L It may be assumed that such tendency is mainly due to the fact that the vertical deflection field is barrel shaped as described above. If the vertical sweep voltage is given a suitable waveform, the described inclination of rasters L and L can be substantially eliminated or at least made negligible. However.
  • the foregoing elimination of the deviation between raster L and rasters L and L at the top and bottom of screen S is achieved by relatively increasing the magnetic field effect acting on center beam B as compared with the magnetic field effect acting on beams B and B
  • the relatively increased magnetic field effect is attained, for example, by providing a correcting magnetic field acting in the same direction as the vertical deflection field, in the case where the beams originate in a horizontal plane, and through which only the central beam B is made to pass.
  • the correcting magnetic field may be advantageously disposed at the entry for beam B to the convergence deflecting means F.
  • such convergence deflecting means F may have its electrode plates P and P attached to the end surface of cylindrical grid G through conductive angle members 51 and 51, respectively. Electrode plates Q and Q are attached to insulating members 53 and 53 mounted on support pins 52 and 52 extending from the electrode plates P and P respectively. Further, a brush or coil spring member 55 is secured to a bracing member 54 bridging the free ends of electrode plates P and P so as to maintain a spacing between these electrode plates. Member 55 is in electrical contact with a conductive layer 56 extending over the inner surface of the neck portion N, and to which an anode voltage V is applied by way of an anode button (not shown). Hence, such anode voltage is applied to electrode plates P and P.
  • Electrodes Q and Q are connected with each other through a conductor wire 57, and a conductor Wire 59 extends from electrode plate Q for example to a button 58 provided in the neck portion N for example, so that a voltage that is 200 to 300 v. lower than anode voltage V can be thereby applied to electrode plates Q and Q.
  • the magnetic correcting field is provided by mounting magnetic yoke members Y and Y on the outer surfaces of electrode plates P and P, respectively, adjacent angle members 51 and 51.
  • Each of these magnetic yoke members Y and Y may include a flat or straight portion 60 extending across the corresponding electrode plate P or P, and bent end portions 61 and 62 which extend outwardly from the opposite ends of straight portion 60.
  • magnetic leakage flux from the vertical deflection field produced by deflection yoke means 20 can pass through the opposing magnetic yoke members Y and Y, as indicated by the arrows 63 on FIG. 5. It is obvious that because of the described configuration of magnetic yoke members Y and Y, the field distribution density in the space between straight portions 60, and through which center beam B passes is higher than the field distribution densities in the portions through which side beams F and F pass, as shown in FIG. 6.
  • each of magnetic yoke members Y and Y is provided with the bent portions 61 and 62, the magnetic flux densities between such bent portions 61 and 62 are lower than the magnetic flux density between straight portions 60 thereof. In this way, the vertical deflection of center beam B is increased more than the vertical deflections of side beams B and B Thus, it is possible to eliminate deviations of the position of center beam B from the positions of side beams B and B Consequently, rasters L L and L resulting from beams B B and B can appear substantially along the common horizontal line U.
  • the above described corrective effect can be produced merely by providing magnetic yoke members Y and Y at the entry to convergence means F. Furthermore, the magnetic correcting field needed for assisting the vertical deflection of the center beam can be obtained from the leakage component of the vertical deflection field produced by deflection yoke means 20. Therefore, there is no need to provide any special electromagnetic means to produce the deflection correcting field.
  • the yoke members Y and Y according thereto are employed to correct a deviation of the raster of center beam B from the rasters of side beams B and B that may remain even when the horizontal and vertical deflection coils are given the configuration described with reference to FIGS. 2A and 2B.
  • the yoke members Y and Y' can be still employed to correct the aforementioned deviation between the rasters of the three electron beams.
  • the application of the present invention is not limited to the tube arrangement of FIG. 1, wherein plural beams are made to cross each other at the center of a main focussing lens of a single electron gun and subsequently pass through convergence deflecting means to converge with each other at the screen.
  • the invention has been described as applied to a color cathode ray tube having a single common cathode, and three separate first grids, it is to be understood that the present invention can be equally applied to a color cathode ray tube including three separate cathodes and a single first grid formed with three apertures through which the three beams can pass respectively. Furthermore, it will be appreciated that the invention also can be applied to any color cathode ray tube in which the three beams originate in a horizontal plane and enter into the field produced by horizontal-vertical deflection yoke means at predetermined incident angles to each other, but without crossing each other at the optical center of a main focussing lens, as in FIG. 1.
  • the three beams originate in a horizontal plane.
  • these three beams may originate in a vertical plane, in which case the horizontal deflection coils should be wound in a saddle-like form to produce a barrel shaped horizontal deflection field, and the vertical deflection coils should be wound in a toroidal form to produce a pincushion shaped field.
  • the horizontal deflection coils should be wound in a saddle-like form to produce a barrel shaped horizontal deflection field
  • the vertical deflection coils should be wound in a toroidal form to produce a pincushion shaped field.
  • a color cathode ray tube having means generating plural beams including a central beam and opposite side beams which originate in a common plane and which are directed, at predetermined incident angles to each other for convergence on a screen, through horizontal and vertical deflection fields produced by electromagnetic deflection means and by which said beams are made to scan said screen, the improvement comprising magnetic yoke means disposed wholly within said tube adjacent the paths of said beams through said deflection fields and being operative to collect leakage flux from one of said fields and to concentrate the collected leakage flux in a correction field through which only said central beam passes for correcting deviations between the rasters of said plural beams on said screen.
  • a color cathode ray tube in which said magnetic yoke means includes two spaced apart yoke members disposed at opposite sides of the path of said central beam and being shaped to collect said leakage flux for concentration in the space between said yoke members.
  • each of said yoke members includes a substantially straight portion extending substantially parallel to and in spaced relation to the straight portion of the other yoke member, and end portions at the ends of said straight portion and being directed at substantial angles to the latter in the direction away from said space between the yoke members.
  • a color cathode ray tube in which said common plane is horizontal and said straight portions of the yoke members extend substantially vertically so that said yoke members collect and concentrate said leakage flux from said vertical deflection field.
  • a single-gun, plural-beam color picture tube which includes a color screen having arrays of color phosphors and beam selecting means provided with apertures corresponding to said arrays, beam generating means for directing a central electron beam and two side electron beams in a common plane toward said screen for impingement on respective phosphors of each array through the corresponding aperture, lens means for focussing said electron beams on said screen and having an optical center at which said.
  • beams are made to cross each other with said side beams emerging from said lens means along paths lying in said plane and which are divergent with respect to the central beam, electron beam convergence deflecting means operative, upon the application of a convergence deflecting voltage thereto, to deflect said side beams emerging along said divergent paths for convergence of all of said beams at an aperture of said beam selecting means, and deflection yoke means having sweep signals applied thereto to provide fields which deflect said beams in directions respectively parallel, and at right angles to said plane for causing said beams to scan said screen; the improvement comprising magnetic yoke means disposed wholly within said tube and collecting leakage flux from said field which deflects said beams in said direction at right angles to said plane and concentrating the collected leakage flux in a correction field through which said central beam passes for correcting deviations between the positions of the rasters on the color screen produced by said beams in scanning said screen.
  • a single-gun, plural-beam color picture tube in which said magnetic yoke means includes spaced apart yoke members arranged at opposite sides of said central beam and each having a substantially straight portion at right angles to said plane between said central beam and one of said side beams and end portions at the ends of said straight portion and being directed at substantial angles to the latter in the direction away from the other yoke member so that said end portions act as pole pieces to collect said leakage flux for concentration in said correction field established between said straight portions of the yoke members.

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US796838A 1968-02-05 1969-02-05 Color cathode ray tube of the pluralbeam,single electron gun type Expired - Lifetime US3548249A (en)

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JP43006857A JPS4833331B1 (de) 1968-02-05 1968-02-05

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JP (1) JPS4833331B1 (de)
DE (1) DE1905670B2 (de)
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NL (1) NL163666C (de)

Cited By (16)

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US3688156A (en) * 1969-03-17 1972-08-29 Sony Corp Electron beam deflection system utilizing a yoke having a plurality of separate windings toroidally wound theron
DE2223818A1 (de) * 1972-01-14 1973-07-19 Rca Corp Selbstkonvergierende farbbildwiedergabeeinrichtung
US3860850A (en) * 1971-05-18 1975-01-14 Tokyo Shibaura Electric Co Color cathode ray tube with color raster displacement correction
US3892996A (en) * 1972-01-14 1975-07-01 Rca Corp Self-converging color television display system
US3892995A (en) * 1969-10-01 1975-07-01 Hitachi Ltd Post-deflection acceleration type color picture tube
US3930180A (en) * 1973-05-21 1975-12-30 Philips Corp Color cathode ray tube magnetic pole piece support structure
DE2907192A1 (de) * 1978-02-24 1979-08-30 Rca Corp Farbbildroehre mit verbessertem strahlerzeugungssystem
DE2917268A1 (de) * 1978-05-01 1979-11-08 Rca Corp Farbfernsehbildroehre mit inline- strahlerzeugungssystem
DE3043048A1 (de) * 1979-11-15 1981-09-03 RCA Corp., 10020 New York, N.Y. Inline-farbbildroehre
US4370593A (en) * 1980-12-30 1983-01-25 Rca Corporation In-line electron gun and method for modifying the same
US4547698A (en) * 1980-09-29 1985-10-15 Zenith Electronics Corporation Magnetic deflection field enhancer means for television CRT electron guns
US4556819A (en) * 1983-12-13 1985-12-03 Rca Corporation Color picture tube having inline electron gun with coma correction members
US4620133A (en) * 1982-01-29 1986-10-28 Rca Corporation Color image display systems
US4730144A (en) * 1986-08-27 1988-03-08 Rca Corporation Color picture tube having inline electron gun with coma correction members
US4772826A (en) * 1986-06-26 1988-09-20 Rca Licensing Corporation Color display system
US20090121972A1 (en) * 2005-08-31 2009-05-14 Richard Hugh Miller CRT display having a single plane sheath beam bender and video correction

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FR2201539B1 (de) * 1972-09-29 1976-10-29 Tokyo Shibaura Electric Co

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US2925542A (en) * 1957-05-31 1960-02-16 Gen Electric Deflection and dynamic convergence system for multi-beam cathode ray tubes
US3307067A (en) * 1964-04-16 1967-02-28 Motorola Inc Dynamic blue lateral correction system
US3430099A (en) * 1966-08-23 1969-02-25 Gen Electric Simplified deflection system for plural in-line beam cathode ray tube
US3448316A (en) * 1967-01-14 1969-06-03 Sony Corp Cathode ray tube

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US2925542A (en) * 1957-05-31 1960-02-16 Gen Electric Deflection and dynamic convergence system for multi-beam cathode ray tubes
US3307067A (en) * 1964-04-16 1967-02-28 Motorola Inc Dynamic blue lateral correction system
US3430099A (en) * 1966-08-23 1969-02-25 Gen Electric Simplified deflection system for plural in-line beam cathode ray tube
US3448316A (en) * 1967-01-14 1969-06-03 Sony Corp Cathode ray tube

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688156A (en) * 1969-03-17 1972-08-29 Sony Corp Electron beam deflection system utilizing a yoke having a plurality of separate windings toroidally wound theron
US3892995A (en) * 1969-10-01 1975-07-01 Hitachi Ltd Post-deflection acceleration type color picture tube
US3860850A (en) * 1971-05-18 1975-01-14 Tokyo Shibaura Electric Co Color cathode ray tube with color raster displacement correction
DE2223818A1 (de) * 1972-01-14 1973-07-19 Rca Corp Selbstkonvergierende farbbildwiedergabeeinrichtung
US3800176A (en) * 1972-01-14 1974-03-26 Rca Corp Self-converging color image display system
US3892996A (en) * 1972-01-14 1975-07-01 Rca Corp Self-converging color television display system
DK154378B (da) * 1972-01-14 1988-11-07 Rca Licensing Corp Selvkonvergerende farvebilled-visningsorgan
DE2265368C3 (de) * 1972-01-14 1985-11-14 Rca Corp., New York, N.Y. Farbbildwiedergabeeinrichtung
US3930180A (en) * 1973-05-21 1975-12-30 Philips Corp Color cathode ray tube magnetic pole piece support structure
DE2907192A1 (de) * 1978-02-24 1979-08-30 Rca Corp Farbbildroehre mit verbessertem strahlerzeugungssystem
DE2917268A1 (de) * 1978-05-01 1979-11-08 Rca Corp Farbfernsehbildroehre mit inline- strahlerzeugungssystem
US4396862A (en) * 1978-05-01 1983-08-02 Rca Corporation Color picture tube with means for affecting magnetic deflection fields in electron gun area
DE3043048A1 (de) * 1979-11-15 1981-09-03 RCA Corp., 10020 New York, N.Y. Inline-farbbildroehre
US4634923A (en) * 1979-11-15 1987-01-06 Rca Corporation Color picture tube having improved electron gun
US4547698A (en) * 1980-09-29 1985-10-15 Zenith Electronics Corporation Magnetic deflection field enhancer means for television CRT electron guns
US4370593A (en) * 1980-12-30 1983-01-25 Rca Corporation In-line electron gun and method for modifying the same
US4620133A (en) * 1982-01-29 1986-10-28 Rca Corporation Color image display systems
US4556819A (en) * 1983-12-13 1985-12-03 Rca Corporation Color picture tube having inline electron gun with coma correction members
US4772826A (en) * 1986-06-26 1988-09-20 Rca Licensing Corporation Color display system
US4730144A (en) * 1986-08-27 1988-03-08 Rca Corporation Color picture tube having inline electron gun with coma correction members
US20090121972A1 (en) * 2005-08-31 2009-05-14 Richard Hugh Miller CRT display having a single plane sheath beam bender and video correction

Also Published As

Publication number Publication date
FR2001370B1 (de) 1975-06-20
NL163666B (nl) 1980-04-15
JPS4833331B1 (de) 1973-10-13
DE1905670B2 (de) 1971-11-04
GB1210341A (en) 1970-10-28
DE1905670A1 (de) 1969-09-18
NL6901838A (de) 1969-08-07
FR2001370A1 (de) 1969-09-26
NL163666C (nl) 1980-09-15

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