EP0033438A1 - Dispositif pour régler les faisceaux d'électrons d'un tube d'images en couleurs - Google Patents

Dispositif pour régler les faisceaux d'électrons d'un tube d'images en couleurs Download PDF

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Publication number
EP0033438A1
EP0033438A1 EP81100143A EP81100143A EP0033438A1 EP 0033438 A1 EP0033438 A1 EP 0033438A1 EP 81100143 A EP81100143 A EP 81100143A EP 81100143 A EP81100143 A EP 81100143A EP 0033438 A1 EP0033438 A1 EP 0033438A1
Authority
EP
European Patent Office
Prior art keywords
ring
electron beam
electron
electron beams
plane
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.)
Granted
Application number
EP81100143A
Other languages
German (de)
English (en)
Other versions
EP0033438B1 (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
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/fr
Application granted granted Critical
Publication of EP0033438B1 publication Critical patent/EP0033438B1/fr
Expired legal-status Critical Current

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    • 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 generation system arranged in its neck and emitting three electron beams lying in one plane.
  • the three electron beams which are emitted by such an electron beam generating system must be adjusted in a color picture tube with a shadow mask which is currently customary in such a way that all three electron beams pass through the same hole on the shadow mask.
  • This setting is called converging.
  • the easiest way to achieve this setting is to shift the three electron beams individually, as described, for example, in DE-OS 27 22 477. With a structure according to this step, a displacement of each electron beam can be practically independent of any other electron beam achieve easily.
  • DE-OS 26 12 607 is arranged in the interior of a Fa r b neck tube forming apparatus for adjusting convergence, color purity and raster is also described.
  • a circular wire or band ring on the electron s t r ahlerzeugungssystem, and magnetized so from the outside, that the electron beams are adjusted in the desired manner.
  • the invention is based on the object of specifying 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 magnetizable wire or band ring closed to at least one air gap, which softens encloses a surface perpendicular to the electron beam plane, which is symmetrical with respect to the point of penetration of the central electron beam through this surface, which device allows the electron beams to be adjusted essentially independently of one another but is still simple and stable and easy to assemble.
  • An elongated wire or ribbon ring is used which is perpendicular to the long axis in the electron beam plane and the short axis.
  • This adaptation of the geometry of the ring to the electron beams lying in a plane makes it possible to achieve a significantly better displaceability, in particular an almost mutually independent displaceability of the electron beams.
  • the long sides of the wire ring can run parallel to one another, which allows particularly simple attachment to the outside of one or in a cup-shaped electrode common to all three electron beams.
  • the shape of the ring somewhat, in particular to design the long sides parallel to one another so that the mutual distance between the long sides 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 central section.
  • the ring is inserted into a cup-shaped electrode with a cross-sectional shape which corresponds to the shape of the ring, it is advantageous to form the ring in one piece with an air gap and to insert this ring resiliently into the electrode.
  • the ring is prevented from falling out of the electrode by notches subsequently 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 a focusing electrode of a conventional electron gun.
  • the oval pot 2 there are three openings for the electron beams r, g, b. r is meant to mean that this electron beam stimulates red light strips on the screen of the color picture tube. Accordingly, green and blue fluorescent strips are excited by the other two electron beams.
  • a wire ring 3 consisting of two parts with a round cross-section is inserted and fastened by notches 4 in the side walls of the pot-shaped electrode.
  • the ring 3 consists of a common material used for such purposes. The dimensions of the ring 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.
  • FIG. 3 shows a view of 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. This field deflects this electron beam r to the right.
  • the magnetization shown is chosen arbitrarily. Real magnetization naturally depends on the direction in which the electron beam actually has to be shifted.
  • the middle electron beam g is influenced by the field shown.
  • the field strength and thus the adjusting force exerted on an electron beam decreases quadratically with the distance from the poles.
  • Two or even all three electron beams with a certain magnetization are assumed to be essentially independent of one another if the electron beams, which should not actually be shifted, shift only a third or less than a third as much as the electron beam to be adjusted. If, for example, you now consider the magnetic poles N and S as shown, i.e.
  • the adjusting force that decreases inversely proportional to the square of the distance between the magnetic pole and the electron beam shows that, for example, that in the middle lying electron beam g about half as much as the left electron beam r and the right electron beam b about a quarter as much as the electron beam r is shifted.
  • the angular ranges within which a dependent displacement of all three or only two electron beams from one another takes place are also shown in FIG. 3.
  • An angular range rgb of approximately 60 ° 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 shifted as a function of another if it is shifted by a third or more like the output beam when the output beam is shifted.
  • 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 displaced depending on one another.
  • This angular range encloses approximately 300 °.
  • Mirror image of the vertical axis of symmetry the arrangement of course has the same angular range rg, with magnetization within which the electron beams r and g can only be shifted depending on each other. It can thus be seen that with 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 is independent of another electron beam if the second electron beam is shifted by a third or less than the first electron beam.
  • FIG. 4 those areas are now also drawn on a magnetizable, elongated wire ring according to the invention, in the case of magnetization, within which a mutually dependent displacement of two or even all three electron beams takes place. It can be seen that there is no region on the entire ring, with magnetization only within which all three electron beams are displaced depending on one another. Rather, there are only two short areas gb on the entire ring, in the case of magnetization within which the electron beams g and b are shifted depending on one another. Correspondingly, there are still two areas rb, which, however, are not shown, as in FIG. 3.
  • 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 Elektrönenstrahlen can be moved independently of each other for adjustment of convergence to substantially includes, of course, does not exclude that on ch correspond magnetization forming the beams for adjusting color purity and raster can be shifted together.
  • the ability of the common displacement remains thus obtained, is added to be advantageous during the possibility of independent displacement in one f Achem structure
  • Figure 5a-c show different embodiments of invention are shown äßerVorraumen g em.
  • a magnetizing device magnetizing the wire ring 3 must be placed outside around the circular neck of a color picture tube. This results in those regions of the wire ring according to the invention, which are close to the center electron beam, very far remote from the magnetizing apparatus according to the invention by the geometry of D rahtringes. As a result, the coupling of the areas of the wire ring that are close to the central electron beam is not as good as the coupling to the areas that are close to the outer electron beams.
  • FIG. 5a shows an embodiment of a wire ring 3 in which the mutual distance of the long sides of the ring decreases from the outside to the center, that is to say towards the central electron beam g.
  • magnetic poles located on the ring are moved closer to the central electron beam g, which likewise enables a shift in the extent of the shift of the outer electron beams.
  • FIG. 5a shows an embodiment of a wire ring 3, in which the long sides are subdivided 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 described for FIG. 5a.
  • the magnetic poles on the magnetic wire are brought closer to the central electron beam.
  • the ring is again composed of two parts which abut against each other at the air gaps 6.
  • the embodiments can of course be modified in other ways. This strongly depends on the internal structure of the electrodes used and on the shape of the magnetic ring used . shows a ring with a larger wire thickness than hitherto.
  • FIG. 6 shows a section through an electron beam generation system 8 with cup-shaped electrodes.
  • 1 denotes the electrode which is shown in more detail in FIGS. 1 and 2.
  • the other electrodes bear the reference numerals 10-13.
  • 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, with 13, the anode grid designated.
  • the Elek tronenstrahlerzeugungssystem will be completed by a circular convergence cup is not shown but which detail in FIG.
  • wire rings 3 penciled
  • the wire ring 3:12 lies outside of the electrode 12, the Drah tring 3.1 the outside of the electrode 1 and the wire ring was 3.13 inwardly into the electrode 13.
  • the location inside the electrode 1 already shown in Figures 1 and 2.
  • the wire ring may be linked to other electrodes inside or outside, his par- de re mounted in the circular convergence cup.
  • the Dr h a Tringe 3 are indicated in all figures as a circular wire, as the commercially available magnetic Materi- a l currently ien usually have this shape.
  • the wire rings are fastened by notches 4, as shown for example in FIG. 2, or by tabs punched out of the electrodes or by welding.
  • the type of fastening chosen in each case has nothing to do with the invention and is within the scope of the manual skill.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
EP81100143A 1980-01-30 1981-01-10 Dispositif pour régler les faisceaux d'électrons d'un tube d'images en couleurs Expired EP0033438B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6093207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100143A Expired EP0033438B1 (fr) 1980-01-30 1981-01-10 Dispositif pour régler les faisceaux d'électrons d'un tube d'images en couleurs

Country Status (9)

Country Link
US (1) US4377767A (fr)
EP (1) EP0033438B1 (fr)
JP (1) JPS56120059A (fr)
CA (1) CA1168691A (fr)
DD (1) DD157485A5 (fr)
DE (1) DE3003197A1 (fr)
ES (1) ES8200511A1 (fr)
FI (1) FI68480C (fr)
PL (1) PL133060B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068182A1 (fr) * 1981-06-12 1983-01-05 International Standard Electric Corporation Tube à rayons cathodiques avec bague magnétique

Families Citing this family (7)

* 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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612607A1 (de) * 1976-03-25 1977-10-06 Philips Patentverwaltung Vorrichtung zur statischen konvergenzkorrektur fuer eine farbfernseh-bildwiedergaberoehre
DE2722477A1 (de) * 1977-05-18 1978-11-23 Standard Elektrik Lorenz Ag Farbfernseh-bildroehren
DE2832668A1 (de) * 1977-07-26 1979-02-08 Rca Corp Verfahren und einrichtung zum einstellen der farbreinheit einer in-line- farbfernsehbildroehre

Family Cites Families (3)

* 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 (fr) * 1976-02-05 1979-12-18 Horst H. Blumenberg Canon electronique unifie a electrodes avec tubes protecteurs de faisceaux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612607A1 (de) * 1976-03-25 1977-10-06 Philips Patentverwaltung Vorrichtung zur statischen konvergenzkorrektur fuer eine farbfernseh-bildwiedergaberoehre
DE2722477A1 (de) * 1977-05-18 1978-11-23 Standard Elektrik Lorenz Ag Farbfernseh-bildroehren
DE2832668A1 (de) * 1977-07-26 1979-02-08 Rca Corp Verfahren und einrichtung zum einstellen der farbreinheit einer in-line- farbfernsehbildroehre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0068182A1 (fr) * 1981-06-12 1983-01-05 International Standard Electric Corporation Tube à rayons cathodiques avec bague magnétique

Also Published As

Publication number Publication date
DE3003197A1 (de) 1981-08-06
FI810254L (fi) 1981-07-31
FI68480B (fi) 1985-05-31
DD157485A5 (de) 1982-11-10
FI68480C (fi) 1985-09-10
PL229438A1 (fr) 1981-09-18
EP0033438B1 (fr) 1984-12-27
JPS56120059A (en) 1981-09-21
JPH023259B2 (fr) 1990-01-23
CA1168691A (fr) 1984-06-05
ES498926A0 (es) 1981-11-16
ES8200511A1 (es) 1981-11-16
US4377767A (en) 1983-03-22
PL133060B1 (en) 1985-05-31

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