EP0033438B1 - Vorrichtung zum Einstellen der Elektronenstrahlen einer Farbbildröhre - Google Patents

Vorrichtung zum Einstellen der Elektronenstrahlen einer Farbbildröhre Download PDF

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Publication number
EP0033438B1
EP0033438B1 EP81100143A EP81100143A EP0033438B1 EP 0033438 B1 EP0033438 B1 EP 0033438B1 EP 81100143 A EP81100143 A EP 81100143A EP 81100143 A EP81100143 A EP 81100143A EP 0033438 B1 EP0033438 B1 EP 0033438B1
Authority
EP
European Patent Office
Prior art keywords
frame
electron
electron beams
electron beam
gun system
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
EP81100143A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033438A1 (de
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
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of EP0033438A1 publication Critical patent/EP0033438A1/de
Application granted granted Critical
Publication of EP0033438B1 publication Critical patent/EP0033438B1/de
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
    • H01J29/70—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
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/56—Correction of beam optics
    • H01J2229/563—Aberrations by type
    • H01J2229/5637—Colour purity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/58—Electron beam control inside the vessel
    • H01J2229/581—Electron beam control inside the vessel by magnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/58—Electron beam control inside the vessel
    • H01J2229/583—Electron beam control inside the vessel at the source
    • H01J2229/5835—Electron beam control inside the vessel at the source cooperating with the electron gun

Definitions

  • the invention relates to a device for setting convergence, color purity and raster in a color picture tube with an electron beam generating system arranged in its neck and emitting three electron beams lying in one plane Body exists, which encloses a surface perpendicular to the electron beam plane, which is symmetrical with respect to the point of intersection of the central electron beam through this surface.
  • the three electron beams that are emitted by such an electron gun must be adjusted in a currently used color picture tube with a shadow mask so that all three electron beams pass through the same hole on the shadow mask. This process is called converging.
  • the easiest way to achieve convergence is to shift the three electron beams individually, as is the case with e.g. B. is described in DE-A1-2 722 477.
  • the displacement of each electron beam can be achieved practically independently of any other electron beam.
  • a common shift of all three electron beams in the plane of the electron beams for color purity adjustment and a shift perpendicular to the electron beam level for grid adjustment is also possible.
  • the overall structure is rather complicated, unstable and complex.
  • DE-A1-2 612 607 also describes a device arranged in the interior of the color picture tube neck for setting convergence, color purity and grid.
  • a circular wire or band ring is arranged on the electron gun and magnetized from the outside in such a way that the electron beams are set in the desired manner.
  • the structure described is very simple and stable. However, the electron beams cannot move independently of one another.
  • the invention has for its object to provide a device for setting convergence, color purity and raster in a color picture tube, which allows the electron beams to be set essentially independently of one another, but which is nevertheless simple and stable and easy to assemble.
  • the magnetizable body is designed as an almost rectangular frame, the long axis of which is arranged in the electron beam plane and the short axis of which is perpendicular to the electron beam plane.
  • This geometry of the frame makes it possible to achieve significantly better displaceability, in particular an almost independent displaceability of the electron beams from one another.
  • the long sides of the frame can run parallel to one another, which permits particularly simple fastening on the outside of one or in a cup-shaped electrode common to all three electron beams.
  • the shape of the frame somewhat, in particular to design the long sides parallel to one another in such a way that the mutual distance between the long side decreases from the outside to the center, or that the long sides are divided into three sections of approximately the same length, in which the mutual distance is greater in the outer sections than in the middle section.
  • the frame is inserted into a cup-shaped electrode with a cross-sectional shape which corresponds to the shape of the frame, it is advantageous to form the frame in one piece with an air gap and to insert this frame resiliently into the electrode.
  • the frame is prevented from falling out of the electrode by notches made in the electrode.
  • FIG. 1 and 2 show a cup-shaped electrode 1.
  • the electrode is drawn to scale and corresponds to a part of the focusing electrode of a conventional electron gun.
  • the oval pot 2 there are three openings for the electron beams. r is supposed to mean that this electron beam on the fluorescent screen of the color picture tube is the red one Luminous stripes stimulates. Accordingly, the green and blue fluorescent strips are excited by the other two electron beams.
  • a frame 3 consisting of two parts made of a material with a round cross-section is inserted and fastened by notches 4 in the side walls of the pot-shaped electrode.
  • the frame 3 consists of a permanent magnet material known per se and intended for such purposes. The dimensions of the frame and the entire electrode can be seen in the drawing, it being assumed that the distance between the long parallel walls of the pot 2 is approximately 9.4 mm from one another.
  • FIG. 3 shows a circular wire ring 5 which surrounds three electron beams r, g, b lying in one plane.
  • two magnetic poles N and S are shown, which lie exactly above or below the left electron beam r.
  • the electron beam r is deflected to the right by the generated field.
  • the magnetization shown is chosen arbitrarily. The real magnetization naturally depends on the direction in which the electron beam should actually be shifted.
  • the central electron beam g is shifted about half as much as the left electron beam r and the right electron beam b is shifted about a quarter as much as the electron beam r.
  • FIG. 3 also shows the angular ranges within which there is a dependent displacement of all three or only two electron beams from one another.
  • An angular range r g b of approximately 60 ° C. is shown at the top in FIG. 3, with magnetization within which all three beams are moved depending on one another.
  • the corresponding angular range naturally also extends over the lower part of the magnetized ring.
  • the definition of the dependency again means that a beam is displaced dependent on another if it experiences a displacement which is one third or more of the displacement of the output beam when the output beam is displaced.
  • the angular range gb is also shown in broken lines, in the case of magnetization within which the electron beams g and b can only be shifted as a function of one another.
  • This angular range encloses approximately 300 °.
  • r g Mirroring the vertical axis of symmetry of the arrangement, of course, there is the same angular range r g, with magnetization within which the electron beams r and g can only be shifted depending on one another. It can thus be seen that in this arrangement there is no area on the entire magnetizable circular wire ring, in the case of magnetization, within which an electron beam could be shifted completely independently of at least one second electron beam.
  • a shift of an electron beam should be independent of another electron beam if the second electron beam is shifted by a third or less than the first electron beam.
  • the device according to the invention is simple and stable and can be securely and securely mounted in or on the electrodes of known electron gun systems.
  • the newly created possibility that, despite the use of a simple structure, the electron beams can be shifted essentially independently of one another for the purpose of setting the convergence, does not of course not rule out the fact that with the appropriate dimensions
  • the beams can be shifted together to adjust the color purity and grid.
  • the possibility of moving together remains as is, while the possibility of independent movement with a simple structure is added as an advantage.
  • 5a-c show various embodiments of devices according to the invention.
  • a magnetizing device that magnetizes the frame 3 must be arranged on the outside of the circular neck of a color picture tube. This means that those areas of the frame according to the invention which are close to the central electron beam are very far from the magnetizing device. As a result, the coupling to the regions of the frame which are close to the central electron beam is not as good as the coupling to the regions of the frame which are close to the outer electron beams. It has been found that, in the case of a symmetrically designed magnetizing device, this means that the middle electron beam cannot be shifted as much as the outer electron beams.
  • FIGS. 5a and b show an embodiment of a frame 3 in which the mutual distance of the long side of the frame decreases from the outside to the center, that is to say to the central electron beam g.
  • magnetic poles located on the frame are moved closer to the central electron beam g, which also enables a shift to the extent of the shift of the outer electron beams.
  • the frame according to FIG. 5a is divided into two parts, which are put together into a frame when inserted into the pot of an electrode and thereby form air gaps 6.
  • 5b shows an embodiment of a frame 3 in which the long sides are divided into three sections of approximately the same length, in which the mutual distance is greater in the outer sections than in the middle section.
  • the effect of this arrangement is the same as that of the arrangement described in Fig. 5a.
  • the magnetic poles on the magnetic wire are brought closer to the central electron beam.
  • the frame is again composed of two parts which abut against each other at the air gaps 6.
  • the embodiments can of course be modified in another way. This depends very much on the internal structure of the electrodes used and on the shape of the magnetic frame used.
  • 5c represents e.g. shows a frame with a larger wire thickness than previously. If one compares this with FIG.
  • FIG. 6 shows the section through an electron beam generation system 8 with cup-shaped electrodes.
  • 1 denotes the electrode which is shown in FIGS. 1 and 2.
  • the other electrodes bear the reference numerals 10 to 13.
  • the electrode 10 is the so-called Wehnelt cylinder, the electrode 11 the so-called control grid, the electrode 12 the lower part of the focusing grid, to which electrode 1 represents the upper part, and finally 13 the anode grid .
  • the electron gun is still completed by a circular convergence pot, which is not shown in FIG. 6, however.
  • Some possible further locations for the frame 3 are also shown in dashed lines.
  • the frame 3.12 lies on the outside on the electrode 12, the frame 3.1 on the outside on the electrode 1 and the frame 3.13 on the inside in the electrode 13.
  • the position inside in the electrode 1 has already been shown in FIGS. 1 and 2.
  • the frame can also be attached to other electrodes inside or outside, in particular also in a circular convergence pot.
  • the frames 3 are shown in all figures as circular wires, since the magnetic materials commercially available currently usually have this shape. However, it is of course also possible to use a wire with a rectangular cross section or any other cross section instead of a wire with a circular cross section.
  • the frames are formed by notches 4, such as. B. shown in Fig. 2 or attached by welding.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP81100143A 1980-01-30 1981-01-10 Vorrichtung zum Einstellen der Elektronenstrahlen einer Farbbildröhre Expired EP0033438B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803003197 DE3003197A1 (de) 1980-01-30 1980-01-30 Vorrichtung zum einstellen der elektronenstrahlen einer farbbildroehre
DE3003197 1980-01-30

Publications (2)

Publication Number Publication Date
EP0033438A1 EP0033438A1 (de) 1981-08-12
EP0033438B1 true EP0033438B1 (de) 1984-12-27

Family

ID=6093207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100143A Expired EP0033438B1 (de) 1980-01-30 1981-01-10 Vorrichtung zum Einstellen der Elektronenstrahlen einer Farbbildröhre

Country Status (9)

Country Link
US (1) US4377767A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0033438B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS56120059A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1168691A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DD (1) DD157485A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3003197A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES8200511A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FI (1) FI68480C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
PL (1) PL133060B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3219954A1 (de) * 1982-05-27 1983-12-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart Farbbildroehre mit twistkorrektur
DE3123298A1 (de) * 1981-06-12 1983-01-05 Standard Elektrik Lorenz Ag, 7000 Stuttgart Kathodenstrahlroehre mit magnetring
DE3123301C2 (de) * 1981-06-12 1985-08-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Vorrichtung zum Einstellen von Elektronenstrahlen einer Kathodenstrahlröhre
US4484102A (en) * 1982-03-02 1984-11-20 Rca Corporation Strengthening means for a deep-drawn in-line electron gun electrode
JPS58225543A (ja) * 1982-06-23 1983-12-27 Matsushita Electronics Corp カラ−受像管装置
NL8204465A (nl) * 1982-11-18 1984-06-18 Philips Nv Kleurenbeeldbuis.
NL8600463A (nl) * 1986-02-25 1987-09-16 Philips Nv Kathodestraalbuis met middelen voor het in verticale richting uitrekken van de spot.
DE3605247A1 (de) * 1986-02-19 1987-08-20 Standard Elektrik Lorenz Ag Farbbildroehre

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268753A (en) * 1962-07-06 1966-08-23 Rca Corp Plural electron gun assembly and magnetic convergence cage
US3614502A (en) * 1969-09-16 1971-10-19 Frederick F Doggett Electron gun convergence assembly
CA1068323A (en) * 1976-02-05 1979-12-18 Horst H. Blumenberg Unitized electron gun having electrodes with internal beam-shielding tubes
DE2612607C3 (de) * 1976-03-25 1984-01-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Statische Konvergenzkorrekturvorrichtung in Farbfernsehbildwiedergaberöhren
DE2722477A1 (de) * 1977-05-18 1978-11-23 Standard Elektrik Lorenz Ag Farbfernseh-bildroehren
US4159456A (en) * 1977-07-26 1979-06-26 Rca Corporation Magnetizing apparatus and method for use in correcting color purity in a cathode ray tube and product thereof

Also Published As

Publication number Publication date
DE3003197A1 (de) 1981-08-06
FI68480B (fi) 1985-05-31
CA1168691A (en) 1984-06-05
JPS56120059A (en) 1981-09-21
EP0033438A1 (de) 1981-08-12
FI810254L (fi) 1981-07-31
ES498926A0 (es) 1981-11-16
FI68480C (fi) 1985-09-10
ES8200511A1 (es) 1981-11-16
US4377767A (en) 1983-03-22
PL229438A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-09-18
JPH023259B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1990-01-23
PL133060B1 (en) 1985-05-31
DD157485A5 (de) 1982-11-10

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