EP0068182B1 - Tube à rayons cathodiques avec bague magnétique - Google Patents

Tube à rayons cathodiques avec bague magnétique Download PDF

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Publication number
EP0068182B1
EP0068182B1 EP82104948A EP82104948A EP0068182B1 EP 0068182 B1 EP0068182 B1 EP 0068182B1 EP 82104948 A EP82104948 A EP 82104948A EP 82104948 A EP82104948 A EP 82104948A EP 0068182 B1 EP0068182 B1 EP 0068182B1
Authority
EP
European Patent Office
Prior art keywords
magnetic ring
deflection system
tube
electrode
electron gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82104948A
Other languages
German (de)
English (en)
Other versions
EP0068182A1 (fr
Inventor
Walter Kornaker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Deutschland GmbH
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0068182A1 publication Critical patent/EP0068182A1/fr
Application granted granted Critical
Publication of EP0068182B1 publication Critical patent/EP0068182B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • H01J29/703—Static convergence systems
    • 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
    • H01J29/48—Electron guns
    • H01J29/51—Arrangements for controlling convergence of a plurality of beams by means of electric field only

Definitions

  • the invention relates to a cathode ray tube, in particular a color picture tube, having a front screen, a conical funnel part and a rear tube neck, in which an electron gun with a focusing electrode and other electrodes for generating at least two electron beams is arranged, and a magnetic deflection system attached to the transition from the tube neck to the funnel part for deflecting the electron beams across the screen, with a magnetic ring attached to the electron gun outside the neck area covered by the deflection system.
  • the other type of electron gun has oval electrodes that are common to all three beams. Each electrode has three electron beam openings, the centers of which are all in one plane. Only the convergence pot placed at the very front in the direction of the screen has a circular cross section, as in the first type of electron gun. Tubes with such an electron gun are not yet commercially available with a magnetic ring attached to the electron gun. However, such a tube was presented at the “Electronica” exhibition in 1980, about which an article appeared in Funkschau 26/1980, page 57. In this tube, the magnetic ring was at the very front, i.e. on the side of the focusing electrode facing the screen. The deflection system was designed in such a way that it extended straight over the neck to the point where the magnetic ring was located in the front of the focusing grating.
  • the magnetic rings attached to electron guns are made of an iron-cobalt-vanadium alloy, and they can be magnetized from the outside using a strong magnetizing device to adjust the position of at least two electron beams from a cathode ray tube, particularly in the case of a color picture tube to adjust convergence, color purity and screen.
  • This magnetization initially takes place without an attached deflection system. Only then is the deflection system aligned and attached to the conical funnel part of the tube.
  • two working devices have been required for these manufacturing processes, namely a magnetizing device and a deflection system alignment device.
  • a color picture tube of the type mentioned at the outset is known from the abstract of Japanese patent application JP-A-56/15530 (Patents Abstracts of Japan, Volume 5, No. 66 (E-55) (738), 2.5.81, page 738E55).
  • the magnetic ring is attached to the outside around a focusing electrode.
  • the object of the invention is to improve a cathode ray tube of the type mentioned at the outset and to design it in such a way that the magnetizing process for the magnetic ring and the aligning process for the deflection system can be carried out quickly and safely on the simplest possible setting device.
  • a particularly favorable position of the magnetic ring, as seen in the beam direction, is approximately the center of the focusing electrode. In this position, the magnetic ring is sufficiently far away from the electrodes that generate electron beams, which are annealed during the production process of the tube. If the magnetic ring were too close to these electrodes, there would be a risk that it could also be heated to a high temperature and thus change its magnetic properties considerably. On the other hand, it would be a disadvantage if the magnetic ring were very close to the anode, which has a voltage of 25 kV.
  • the magnetic ring is in fact to be fastened in some way, which causes a deformation of the corresponding electrode at the fastening point. Such deformation, for example a notch in the direct vicinity of the anode, can lead to high voltage flashovers.
  • FIG. 1 shows a color picture tube 10 with a front screen 11, a conical funnel part 12 and a rear tube neck 13.
  • an electron gun 14 which is shown to scale in the side view according to FIG. 2.
  • a magnetic deflection system 15 is attached to the transition between the tube neck 13 and the funnel part 12. It is attached to the neck 13 by a sleeve 16 with a clamp 17.
  • the deflection system 15 is aligned during the manufacturing process of the color picture tube 10 to achieve color purity and dynamic convergence and is held in the aligned position by fastening wedges 66 made of rubber, which are pushed between the front end of the deflection system 15 and the funnel part 12.
  • the front end of the deflection system 15 is to be understood as the end facing the screen 11.
  • the terms front and back will be used throughout the description. It should be noted, however, that when the electron gun 14 is used in technical terms, the terms below and above are used instead of back and front, because the electron gun 14 is assembled and transported as an individual part in this position. In this case, the end facing the screen 11 is referred to as the upper end.
  • the electron gun 14 is shown in dashed lines in FIG. 1 and with it in a strongly dashed line a magnetic ring 19 which is attached to it.
  • the new feature of the color picture tube 10 shown in FIG. 1 is that the magnetic ring 19 is attached at a point on the electron gun 14 at which it is no longer covered by the deflection system 15 to the outside. Compared to previously known color picture tubes 10, this has been done by moving the magnetic ring 19 in the electron gun 14 further down than was previously the case.
  • a deflection system 15 can also be used, in which the sleeve 16 with the clamp 17 is shortened compared to previously known deflection systems 15. It is also possible to use a deflection system which can be attached to the front of the funnel part 12 and not to the tube neck 13 at the rear. As a result, the sleeve 16 with the clamp 17 can be omitted entirely.
  • the magnetic ring 19 is used to adjust the color purity, convergence and grid in the color picture tube 10. It consists of an iron-cobalt-vanadium alloy and is magnetized from the outside through the tube neck in such a way that the color purity, grid and convergence assume predetermined setting values . Such a setting is necessary for the majority of color picture tubes, since only very few color picture tubes go through the manufacturing process without showing any deviations in convergence, color purity and raster before a correction by a magnetic field has been carried out. However, the magnetic field generated also influences the sharpness of the electron beams, which are affected in their position. Therefore, if the position of the magnetic ring 19 on the electron gun 14 is changed, changes in the geometry of the electron gun 14 and / or the voltages applied to it must also be made.
  • FIGS. 2 to 4 An electron gun 14 is shown in FIGS. 2 to 4, to which a magnetic ring 19 can be easily attached at different points.
  • the electron gun 14 in FIG. 2 has a pressed glass plate 20 in which contact pins 21 are melted.
  • the contact pins 21 are conductively connected to contact tabs 22.
  • This is followed by a Wehnelt electrode 23, a control electrode 24, a focusing electrode 25, an anode 26 and a convergence pot 27 with contact springs 28.
  • the individual parts of the electron gun 14, that is to say the contact lug 22 and the electrodes 23 to 26, are held together by two glass rods 29 which are heated to softening in the manufacturing process and into which the opening edges 30 of the electrodes are then pressed. Only one of the two glass rods 29 can be seen in the side view.
  • the convergence pot 27 is by spot welding solution connected to the anode 26. For the sake of clarity, not all connections between contact pins 21 and contact tabs 22 are shown, and cathodes and heaters are also not shown.
  • a magnetic ring 19 is inserted into the focusing electrode 25, which is shown in dashed lines in FIGS. 1 and 2, since it cannot be seen from the outside in the side view. However, the magnetic ring 19 is shown in more detail in FIGS. 3 and 4.
  • the structure of the focusing electrode 25 is shown more clearly in the exploded view according to FIG. 3.
  • the focusing electrode 25 consists of four electrode parts 32 and an intermediate plate 33.
  • Each electrode part 32 consists of a metal pot with bottom 35, pot wall 36 and opening edge 30.
  • three beam passage openings 37 are recessed, which have a circular shape, as can be seen in the top view according to FIG. 4.
  • a central electron beam 38.1 passes through the central beam passage openings 37.1
  • an outer electron beam 38.2 passes through the outer beam passage openings 37.2.
  • the beam passage openings 37 lie next to one another in an electrode part 32, which leads to an oval configuration of the electrode part 32.
  • the electrodes 23 to 26 are only slightly narrower than the convergence pot 27.
  • the electrodes appear narrower than the convergence pot compared to the circular shape of the convergence pot 27 because of the oval embodiment shown in FIG. 4.
  • two electrode parts 32 are first put together with their bottoms 35 and connected to one another by spot welding to form a central part 39.
  • the magnetic ring 19 is then inserted into the upper electrode part 32 of this middle part 39 and fastened by means of notches 40.
  • the notches 40 are made in the pot wall 36 in such a way that they point directly above the magnetic ring 19 into the interior of the electrode part 32.
  • the intermediate plate 33 and an electrode part 32, referred to as the upper part 41, with its opening edge 30 are then placed on the upper opening edge 30 of the middle part 39.
  • the fourth electrode part 32 referred to as the lower part 42, is placed with its opening edge 30 on the lower opening edge of the central part 39. All parts are then held by the glass rods 29 pressed into the opening edges 30.
  • the shape of the magnetic ring 19 and its attachment by notches 40 can be seen in FIGS. 3 and 4.
  • the magnetic ring 19 consists of two identical magnetic ring parts 19.1, which together form an oval ring.
  • the ends of the magnet ring parts 19.1 abut one another with an air gap 43.
  • the air gaps 43 are drawn very large, so that it may appear that the ends of the magnet ring parts 19.1 are not directly adjacent to one another.
  • An electron gun 14 with the structure described has the advantage that the magnetic ring 19 can be accommodated at any point on the focusing electrode 25 without having any significant effects on the sharpness of the electron beams 38.
  • the illustrated and previously described position of the magnetic ring 19 approximately in the middle of the focusing electrode 25 is particularly advantageous. Layers on the bottom of the lower part 42 or the upper part 41 are less advantageous. If the magnetic ring 19 is inserted into the upper part 41 and fastened with notches 40, there is a risk of high-voltage flashovers between the notches 40 and the anode 26, which is at 25 kV. In the case of an electron gun 14 according to the exemplary embodiment, a voltage of approximately 7 kV is present at the focusing electrode 25.
  • electron guns 14 are also used to a large extent, in which the focusing electrode 25 is shorter and in which only about 4.5 kV are applied to it. However, this is irrelevant for the new color picture tube, since all that is important is that the magnetic ring is not covered from the outside by the deflection system 15.
  • the position of the magnet ring 19 on the bottom 35 of the lower part 42 is therefore generally of less advantage, since in the course of the production of conventional tubes 10 the cathodes (not shown) and thus the Wehnelt electrode 23 and the control electrode 24 are heated to a great extent. There is a risk that the lower part 42 and with it an inserted magnetic ring 19 will also be heated, as a result of which this would change its magnetic properties considerably. However, this danger does not exist with tubes where there is no baking out.
  • the attachment of the magnetic ring 29 in the central region of the focusing electrode 25 is of particular advantage.
  • the magnetic ring 19 can either be fastened, as shown, to the bottom 35 of the upper electrode part 32 of the middle part 39 or to the bottom of the lower electrode part 32 of the middle part 39.
  • Fastening at the top or bottom of the intermediate plate 33 can also be carried out, for which purpose tabs are expediently bent out of the edge of the intermediate plate 33 and hold the magnetic ring 19 in place.
  • Such positions and attachment options are not shown in the figures. They are also irrelevant for the new tube, since it is only a matter of the position of the magnet ring 19 in relation to the deflection system 15.
  • the magnetic ring 19 is not covered by the deflection system 15, it is also irrelevant whether it is a thin-necked color picture tube with about 29 mm outside of the neck diameter or a thick-necked tube with an outside diameter of about 36 mm or, for example, a Trinitron tube or a multi-beam oscillograph tube.
  • an electron gun 14 for a thin-necked tube is shown.
  • the magnetic ring 19 has a long inner diameter of 20.45 mm and a short inner diameter of 9.4 mm.
  • the circular convergence pot has a diameter of 27 mm.
  • the magnetic ring 19 can be attached to the inside or outside of the electron gun and it can consist of one or more magnetic ring parts. Its attachment must be adapted to the type of electrode to which it is attached. It should be noted that plate-shaped electrodes are often used instead of the cup-shaped electrodes according to the illustrated embodiment in electron guns.
  • the exact embodiment of an electron gun and the magnetic ring 19 attached to it is not significant, the exact embodiment of the deflection system is also irrelevant as long as the magnetic ring is not covered by the deflection system.
  • Deflection systems can thus be used in which both the coil pairs for the horizontal and for the vertical deflection are formed by saddle coils, and also deflection systems can be used which have toroidal and saddle coils.
  • the latter will generally be cheaper, since these combined coils can often be made shorter than deflection systems that only have saddle coils.
  • the condition that the magnetic ring is not covered by the deflection system is easier to meet.
  • the type of attachment of the deflection system is also not the main issue.
  • the particular advantage of a new cathode ray tube 10 is that all of the setting operations for the magnetic ring 19 and the deflection system 15 can be carried out in the simplest manner on a common setting device 44.
  • An adjusting device 44 is shown partially schematically in FIG. 5.
  • a carriage guide 46 for a tube receiving carriage 47 and a guide rod 48 for guiding a deflection system alignment device 49 are mounted on a device table 45.
  • the slide guide 46 and the guide rod 48 allow displacements of the tube receiving slide 47 and the deflection system alignment device 49 in the direction of the longitudinal axis 18 of the tube.
  • Deflection system alignment devices are e.g. known from US-A-3 992 578 or EP-A-0 021 275.
  • a deflection system alignment device 49 similar to the latter device is shown in partial schematic form in FIG. 5.
  • a guide slide can be displaced on the guide rod 48, to which a bearing plate 50 which is perpendicular to the longitudinal axis 18 of the tube is fastened.
  • the bearing plate 50 has a spherical cap-shaped bearing surface 51, in which a receiving ring 52 is gimbal-mounted.
  • Adjusting forces, represented by an arrow 54 act on the receiving ring 52 via a pin 53, by means of which the cardanic movement of the receiving ring 52 is carried out.
  • the adjustment mechanism is not shown for the sake of clarity. As a rule, mechanisms are available by which it is possible to operate the adjustment of the receiving ring 52 from the screen side of the setting device 44.
  • Clamping jaws 55 are adjustably attached to the receiving ring 53. These clamping jaws 55 are used to fasten a deflection system 15 in the receiving ring.
  • a deflection system 15 also shown, has a clamping ring 56 at its rear end, which is inserted into a recess in the receiving plate and is held by the adjusted clamping jaws 55.
  • the adjustment mechanism of the jaws 55 is also not shown for the sake of clarity.
  • the adjusting device 44 also has contacting devices 57, specifically an anode contacting device 57.1 and a neck contacting device 57.2.
  • the anode contact device 57.1 is mounted insulated in a device-fixed manner, but this is also not shown in detail.
  • the neck contacting device 57.2 is connected to the guide rod 48 in a non-displaceable manner via a contacting device holder 58.
  • a contacting device holder 58 At the upper end of the contact device holder 58 there is a bolt guide head 59, into which a sleeve 60 attached to the neck contact device engages.
  • the sleeve 60 is displaceably mounted in the bolt guide head 59 and is pressed forward by the force of a spring, not shown, to the screen side of the adjusting device 44 up to a contact point.
  • a magnetizing device 62 sits in front of the neck contacting device 57.2 at a distance predetermined by spacing pins 61. Such devices are e.g. described in DE-A-26 12 607 or DE-A-28 32 667. Such a magnetizing device 62 has magnetizing coils 63, which are shown schematically in dashed lines inside the magnetizing coil. The magnetizing coils 63 generally have a large number of electrical connections 64, of which only two are shown.
  • the neck contacting device 57.2 is mounted in its position in such a way that a color picture tube placed on the tube receiving carriage 47 engages with the contacting pins 21 in the adjusting device 47.2 when it is inserted into the adjusting device, thereby engaging the neck contacting device 57.2 presses slightly against the pressure of the spring in the bolt guide head 59. This counterforce ensures reliable contact and a secure fit of the color picture tube 10 in the adjusting device 44.
  • the anode contact device 57.1 is also mounted such that it just contacts the anode contact 65 attached to the funnel part 12 when the tube 10 is inserted.
  • the magnetizing device 62 is fastened to the neck contacting device 57.2 such that the tube neck 13 penetrates centrally through a recess in the magnetizing device 62 when the tube 10 engages with the contacting pins 21 in the neck contacting device 57.2.
  • the deflection system alignment device 49 holds a deflection system 15 such that a color picture tube 10 can reach with its neck 13 through the deflection system 15 unimpeded when it is inserted into the adjustment device 44.
  • the distance 67 between the deflection system alignment device 49 and the magnetization device 62 is selected such that the magnetization device 62 is just above the magnetic ring 19 when the deflection system 15 is in the correct position above the funnel part 12. In order to be able to maintain the required distance, it is advantageous if the magnetic ring is at least 5 mm behind the rear end of the deflection system.
  • the screen side of the setting device is understood below to mean the side on which the screen 11 of an inserted color picture tube 10 is located.
  • the tube receiving slide 47 with the slide guide 46 is pulled out of the adjusting device 44 all the way to the screen side.
  • the clamping jaws 55 are adjusted so that a deflection system 15 with its clamping ring 56 can be inserted into the receiving ring 52.
  • a deflection system 15 is first inserted into the receiving ring 52 and held in place by adjusting the clamping jaws 55.
  • a tube 10 is then placed on the tube receiving carriage 47 and pushed into the adjusting device 44 until the contact pins 21 engage the neck contacting device 57.2 and finally the tube 10 is held in place by engaging a not-shown notch in the receiving carriage 47.
  • the anode contact device 57.2 contacts the anode contact 65.
  • the magnet ring 19 is magnetized with the aid of the magnetizing device 62 in such a way that color purity, screen and convergence are set to predetermined values.
  • the deflection system 15 is then aligned according to predetermined setting criteria.
  • a movement of the deflection system 15 in the direction of the longitudinal axis 18 of the tube and a tilting movement with respect to the longitudinal axis of the tube is possible.
  • movements in the direction of the longitudinal axis 18 of the tube and two directions perpendicular thereto must take place for alignment.
  • the deflection system 15 After the deflection system 15 has been aligned, it is connected to the tube neck 13 via the sleeve 16 with a clamp 17 and to the funnel part 12 by means of fastening wedges 66 placed underneath.
  • Such compensation of errors that can be influenced both by the magnetic ring 19 and by the deflection system 15 can only be remedied when using a tube of the type described here, in which case the magnetic ring 19 is not covered by the deflection system 15, in which the magnetization and the alignment of the deflection system can be carried out simultaneously and independently of one another on an adjusting device of the specified type.

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  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Claims (2)

1. Tube cathodique, en particulier tube pour images en couleur, comprenant un écran (11), une partie conique (12) et une partie postérieure en forme de col (13) dans laquelle sont disposés un canon à électrons (14) muni d'une électrode de focalisation (25) et d'autres électrodes pour produire au moins deux faisceaux électroniques, ainsi qu'un dispositif de déflexion magnétique (15) des faisceaux électroniques (38) sur l'écran (11 ) qui est situé dans la zone reliant la partie conique (12) au col (13), et un anneau magnétique (19) fixé au canon électronique (14) en dehors de la zone du col recouverte par le dispositif de déflexion magnétique, caractérisé en ce que l'électrode de focalisation (25) comprend quatre portions d'électrode (32) en forme de pot, chacune ayant un fond (35), une paroi latérale (36) et un bord d'ouverture (30), en ce que les fonds (35) de deux des portions d'électrode sont disposés en vis-à-vis l'un de l'autre et sont reliés entre eux pour former une partie centrale (39), en ce que les bords d'ouverture (30) des deux autres portions d'électrode (32), qui forment respectivement une partie supérieure (41 ) faisant face à l'écran (11 ) et une partie inférieure (42), sont placés sur et reliés aux bords d'ouverture (30) correspondant de la partie centrale, et en ce que l'anneau magnétique (19) est fixé à l'intérieur du fond (35) de l'une des deux portions d'électrode (32) formant la partie centrale (39).
2. Tube cathodique, en particulier tube pour images en couleur, comprenant un écran (11), une partie conique (12) et une partie postérieure en forme de col (13) dans laquelle sont disposés un canon à électrons (14) muni d'une électrode de focalisation (25) et d'autres électrodes pour produire au moins deux faisceaux électroniques ainsi qu'un dispositif de déflexion magnétique (15) des faisceaux électroniques (38) sur l'écran (11) qui est situé dans la zone reliant la partie conique (12) au col (13), et un anneau magnétique (19) fixé au canon électronique (14) en dehors de la zone du col recouverte par le dispositif de déflexion magnétique, caractérisé en ce que l'électrode de focalisation (25) comprend quatre portions d'électrode (32) en forme de pot, chacune ayant un fond (35), une paroi latérale (36) et un bord d'ouverture (30), en ce que les fond (35) de deux des portions d'électrode sont disposés en vis à vis l'un de l'autre et sont reliés entre eux pour former une partie centrale (39), en ce que le bord d'ouverture (30) d'une autre portion d'électrode (32), formant une partie supérieure (41 ) faisant place à l'écran, est placé sur et relié au bord d'ouverture (30) correspondant de la partie centrale avec interposition entre eux d'une plaque intermédiaire (33), en ce que le bord d'ouverture (30) de la dernière portion d'électrode (32), formant une partie inférieure est placé sur et relié au bord d'ouverture (30) correspondant de la partie centrale (29), et en ce que l'anneau magnétique (19) est fixé à la plaque intermédiaire.
EP82104948A 1981-06-12 1982-06-05 Tube à rayons cathodiques avec bague magnétique Expired EP0068182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813123298 DE3123298A1 (de) 1981-06-12 1981-06-12 Kathodenstrahlroehre mit magnetring
DE3123298 1981-06-12

Publications (2)

Publication Number Publication Date
EP0068182A1 EP0068182A1 (fr) 1983-01-05
EP0068182B1 true EP0068182B1 (fr) 1985-11-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104948A Expired EP0068182B1 (fr) 1981-06-12 1982-06-05 Tube à rayons cathodiques avec bague magnétique

Country Status (5)

Country Link
US (1) US4591755A (fr)
EP (1) EP0068182B1 (fr)
JP (1) JPS5814450A (fr)
CA (1) CA1194076A (fr)
DE (2) DE3123298A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833364A (en) * 1984-04-04 1989-05-23 Hitachi, Ltd. Electron gun for color picture tubes having uniquely formed lens apertures
NL8500807A (nl) * 1985-03-20 1986-10-16 Philips Nv Beeldbuis.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992578A (en) * 1976-01-08 1976-11-16 General Instrument Of Canada Ltd. Yoke mounting apparatus
DE2612607C3 (de) * 1976-03-25 1984-01-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Statische Konvergenzkorrekturvorrichtung in Farbfernsehbildwiedergaberöhren
US4396862A (en) * 1978-05-01 1983-08-02 Rca Corporation Color picture tube with means for affecting magnetic deflection fields in electron gun area
DE2924949A1 (de) * 1979-06-21 1981-01-15 Standard Elektrik Lorenz Ag Vorrichtung zum einstellen des ablenksystems einer farbbildroehre
DE3003197A1 (de) * 1980-01-30 1981-08-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Vorrichtung zum einstellen der elektronenstrahlen einer farbbildroehre
US4370593A (en) * 1980-12-30 1983-01-25 Rca Corporation In-line electron gun and method for modifying the same

Also Published As

Publication number Publication date
US4591755A (en) 1986-05-27
JPS5814450A (ja) 1983-01-27
CA1194076A (fr) 1985-09-24
DE3267668D1 (en) 1986-01-09
DE3123298A1 (de) 1983-01-05
EP0068182A1 (fr) 1983-01-05

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