EP0095617B1 - Tube-image couleurs comprenant des moyens de correction des défauts de torsion - Google Patents

Tube-image couleurs comprenant des moyens de correction des défauts de torsion Download PDF

Info

Publication number
EP0095617B1
EP0095617B1 EP83104638A EP83104638A EP0095617B1 EP 0095617 B1 EP0095617 B1 EP 0095617B1 EP 83104638 A EP83104638 A EP 83104638A EP 83104638 A EP83104638 A EP 83104638A EP 0095617 B1 EP0095617 B1 EP 0095617B1
Authority
EP
European Patent Office
Prior art keywords
correction
electron
magnets
magnet
picture tube
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
EP83104638A
Other languages
German (de)
English (en)
Other versions
EP0095617A3 (en
EP0095617A2 (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.)
Panasonic Holdings Corp
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
Alcatel NV
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, Alcatel NV filed Critical Alcatel SEL AG
Publication of EP0095617A2 publication Critical patent/EP0095617A2/fr
Publication of EP0095617A3 publication Critical patent/EP0095617A3/de
Application granted granted Critical
Publication of EP0095617B1 publication Critical patent/EP0095617B1/fr
Expired legal-status Critical Current

Links

Images

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
    • 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 color picture tube consisting of a screen trough, cone and neck, in which the screen trough is provided with a fluorescent screen and mask and an inline electron gun system with at least one correction magnet is arranged in the neck.
  • the screen image is produced by horizontal and vertical deflection of three electron beams which meet in the plane of the mask provided with openings, the electron beams passing through the openings in different directions and the ones assigned to them, arranged on the one behind the mask Excite the fluorescent screen adjacent fluorescent areas.
  • the static convergence of the color picture tube is set when the three electron beams run without a deflection field in such a way that they hit the center of the mask together.
  • Static color purity is present when the electron beams hit the fluorescent areas of the fluorescent screen assigned to them through the openings in the mask at the correct angle. Dynamic convergence and color purity are maintained if color purity and convergence are present on the entire fluorescent screen when the electron beams are deflected together by the magnetic field of the deflection unit.
  • a ring made of easily magnetizable permanent magnet material, which is located at the level of the grating 3 above the electron gun system.
  • a further magnetizable wire ring can be arranged alone or additionally on the end of the electron gun system facing the fluorescent screen. This wire ring can also be present in the convergence electrode.
  • the rings are magnetized on their circumference so multipolar that the electron beams experience the necessary corrective deflections.
  • twist error which consists in that the lines written by the three electron beams when deflected on the screen are inclined towards one another with the aid of the multipolar magnetized ring mentioned above, does not succeed because at the same time with the reduction of the Twist error other dynamic errors arise.
  • This is very disadvantageous because it is therefore not possible to effectively eliminate the twist error, so that color picture tubes with such construction errors have to be reworked in such a way that a new electron gun system is used.
  • the object of the invention is to provide an inexpensive device for correcting twist errors.
  • Claims 2 to 5 indicate advantageous refinements of the invention.
  • the electron beams to be corrected are deflected by additional correction magnets before entering the magnetic field of the deflection unit and before passing through the correction fields for color purity and convergence.
  • correction magnets are attached near the external electron beams and magnetized in such a way that the electron beams can be deflected in different directions, that is, from the plane in which the three electron beam generator systems lie.
  • the central electron beam should not be influenced by the correction magnets.
  • the magnetization of the correction magnets in color picture tube production can take place on the same machine on which other correction magnets are also set.
  • a ring of magnetizing coils with strongly bundled magnetic fields is arranged displaceably in the direction of the longitudinal axis of the color picture tube in place of the correction magnets to be magnetized.
  • the effect of the magnetizations is measured with the aid of sensors arranged in front of the luminescent screen, and the magnetization of the correction magnets then continues until they have the required magnetization.
  • the color picture tube in Figure 1 consists of the screen trough 7 with the fluorescent screen 1 and the mask 2, the cone 6 and the neck 5 and has the electron gun system 3, which is located in the neck 5 of the color picture tube.
  • the electron gun system is shown enlarged in Figure 2. It has a correction magnet 10 for the correction of color purity and convergence and a correction magnet 11 which makes this correction free of twist errors.
  • FIG. 3 shows in dashed lines the course of an electron beam that is only convergent-corrected with a correction magnet 10 and requires correction and dash-dot lines the course of an electron beam corrected for convergence with two correction magnets 10 and 11 without twist errors.
  • the curve shown in dashed lines arises when a correction magnet 10 is present.
  • the dash-dotted curve occurs when the correction magnet 11 is arranged in addition to the correction magnet 10.
  • the course of an electron beam not requiring correction up to the correction magnet 10 is shown in dotted lines. Both the courses of the electron beam shown in FIG. 3, starting from the cathode 24, end on the center of the luminescent screen 14.
  • the convergence correction is carried out with the correction magnet 10 arranged at the level of the line 12.
  • the twist error-free convergence correction is prepared by a further correction magnet 11, which corrects itself in the amount of Line 13 is located.
  • FIG. 4 shows how the deflection takes place without the correction magnets 11.
  • FIG. 5 shows how the correction magnets 11 according to the invention, which lie in a plane containing the section line 13, direct the course of an electron beam, which is initially shown in broken lines, toward the plane 19.
  • the deflection of the electron beam into the plane 19 is effected by the correction magnet 10, which is located in the plane containing the section line 12.
  • the corrected electron beam then runs on the now correct, dash-dotted path into the magnetic field of the deflection unit and thus does not cause any dynamic distortions during the deflection.
  • the dashed line corresponds to the course of an electron beam corrected only by a correction magnet 10.
  • the dotted line corresponds to the course of an electron beam that does not require correction.
  • Figure 6 shows an embodiment for the arrangement and design of the correction magnets 11.
  • the openings 20 through which the outer electron beams enter the grid 3 lie in the area of influence of the correction magnets 11, which can be shaped in an I, U or E shape. They are preferably fixed in the part 21 of the grid 3 of the electron gun system facing the cathode in a non-positive or positive manner.
  • the correction magnets 10 are provided in the middle part 22 of the grating 3.
  • FIG. 7 an embodiment with U-shaped correction magnet 11 is shown, in Fig. 8 with an E-shaped correction magnet.
  • the correction magnets 11 can also be attached to the outside of the grating 3.
  • a corresponding arrangement on the grid 2, inside or outside, is also possible.
  • FIG. 10 gives an example of the closely adjacent attachment of correction magnets 10 inside the grid 3 in the form of clips and the correction magnets 11 outside on the grid 3 as a U-shaped bracket.
  • the shape of the correction magnets can be seen from FIGS. 11 and 12: FIG. 11 is the section AB in FIG. 10 and FIG. 12 shows the section CD of FIG. 10.
  • FIG. 13 is a representation of a structure with correction magnet 10 in two planes and a correction magnet 11 in one plane.
  • section AB of FIG. 13 which is shown in FIG. 14, correction magnets 10 divided by air gaps are inserted into the central part of the grating 3, while in FIG. 15 section CD of FIG. 13 shows I-shaped correction magnets 11 which two basic forms of magnetization are symbolically illustrated.
  • the magnetization with three magnetic poles shown on the left effects the displacement of the electron beam perpendicular to the plane of the electron beams, while the magnetization with two magnetic poles indicated on the right in FIG. 15 causes a deflection of the neighboring electron beam in a horizontal direction.
  • one or both of the outer electron gun systems may twist from the intended plane.
  • the deflection unit is aligned precisely with the horizontal desired position of this plane, so that twisted electron beams with positional deviations enter the magnetic field of the deflection unit.
  • a twist angle a results, which leads to dynamic convergence errors.
  • the twist error is eliminated by the magnetization of the correction magnet 11 according to the invention alternating with the magnetization of the correction magnet 10.
  • the dosing of the twist correction is done by the different magnetization of the correction magnets. If the electron beam path is influenced in this way, this path is bent twice. This not only corrects the direction of the course, but also the position of the electron beam.
  • a simultaneous correction of the course of the two outer electron beams is possible and desirable, but is not absolutely necessary because of the already satisfactory effect in the case of asymmetrical correction. It can be sufficient to influence an external beam, i. H. the correspondingly dimensioned two-pole field of a correction magnet 11 with a suitable arrangement for the electron beam is sufficient.
  • correction magnet (s) 11 are arranged in the beam generator system, e.g. Correction magnets 11 used in the form of pieces of wire, which are preferably attached to the bottom of the inner edge of grid 3.
  • the magnetization coils that are already present for the magnetization of the correction magnets 10 can be used to magnetize the wire pieces, which are temporarily brought to the height of the correction magnets 11 on the electron gun system.
  • magnet bundles provided with one or more air gaps can also be used if the magnetizing coils can be used to achieve a narrowly delimited, that is to say sharply localized magnetization of the magnetic stirrups near the outside beams.
  • Pieces of wire or brackets are attached to the grid 3 in a non-positive or positive manner on the inside or outside.
  • the shape of the correction magnets and their geometric position on the longitudinal axis of the electron gun system depends on the properties of the type of color picture tube concerned and can also differ from the exemplary embodiment shown in FIG. 6. So correction magnets 11 z. B. are also in the upper part 23 of the grid 3 when the correction magnets 10 are in the grid 4, the so-called convergence pot.
  • correction magnets 11 are low, so that all color picture tubes can be equipped with the correction magnets 11 during their manufacture. In this way, more than half of the rejects caused by twist errors, which would make it necessary to re-glaze an electron gun system, can be avoided.
  • the magnetization of the correction magnets 11 must take place in such a way that the magnetic field of the correction magnet influencing the adjacent external beam runs in the plane of the electron beams.
  • the magnetic field of the correction magnet at the location of the electron beam then shifts it out of the plane, as illustrated on the left in FIG. 15.
  • Magnetizing the correction magnet, as indicated on the right in FIG. 15 creates a magnetic field perpendicular to the plane of the electron beams at the location of the adjacent external beam.
  • the resulting displacement of the relevant outside beam thus takes place in the plane of the Electron beams, which then also supports the color purity and convergence correction.
  • the electron beam is displaced in any direction, so that deflection of the outer electron beams can be achieved in all directions between vertical and horizontal.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Claims (5)

1. Tube image couleurs comprenant une plaque avant, un cône et un col, dans lequel cette plaque avant est pourvue d'un écran luminescent et d'un masque, un système de canons électroniques en ligne et au moins un anneau aimanté de correction étant disposés dans ledit col, caractérisé en ce que, en regardant dans le sens des faisceaux électroniques, ledit système de canons électroniques comporte au moins un aimant de correction additionnel approprié (11), proche des faisceaux électroniques sortants, en avant du ou des anneaux aimantés (10), dont la magnétisation dévie les faisceaux électroniques sortants dans un plan (19) horizontal passant par le centre (14) de l'écran et s'étendant dans la direction des générateurs de faisceaux électroniques.
2. Tube image couleurs conforme à la revendication 1, caractérisé en ce que deux aimants de correction additionnels sont disposés dans la grille n° 3.
3. Tube image couleurs conforme à la revendication 1, caractérisé en ce que deux aimants de correction additionnels sont disposés à l'extérieur de la grille n° 3.
4. Tube image couleurs conforme à la revendication 2 ou 3, caractérisé en ce que ces aimants de correction additionnels (11) ont une forme en I, UouE.
5. Tube image couleurs conforme à l'une quelconque des revendications 1 à 4, caractérisé en ce que la distance entre le ou les aimants de correction additionnel(s) (11) et le ou les anneaux aimantés de correction (10) est de 6 mm au moins.
EP83104638A 1982-05-27 1983-05-11 Tube-image couleurs comprenant des moyens de correction des défauts de torsion Expired EP0095617B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219954 1982-05-27
DE19823219954 DE3219954A1 (de) 1982-05-27 1982-05-27 Farbbildroehre mit twistkorrektur

Publications (3)

Publication Number Publication Date
EP0095617A2 EP0095617A2 (fr) 1983-12-07
EP0095617A3 EP0095617A3 (en) 1984-10-17
EP0095617B1 true EP0095617B1 (fr) 1987-11-19

Family

ID=6164634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104638A Expired EP0095617B1 (fr) 1982-05-27 1983-05-11 Tube-image couleurs comprenant des moyens de correction des défauts de torsion

Country Status (5)

Country Link
US (1) US4625144A (fr)
EP (1) EP0095617B1 (fr)
JP (1) JPS58218732A (fr)
CA (2) CA1206321A (fr)
DE (2) DE3219954A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2728212B2 (ja) * 1988-11-22 1998-03-18 株式会社日立製作所 カラーブラウン管装置
US5233267A (en) * 1989-10-03 1993-08-03 Matsushita Electronics Corporation Dynamic convergence system for color cathode ray tubes having an in line electron gun
JP2945688B2 (ja) * 1989-10-03 1999-09-06 松下電子工業株式会社 カラー受像管装置
JP3135421B2 (ja) * 1993-07-06 2001-02-13 松下電子工業株式会社 カラー陰極線管
US5557164A (en) * 1995-03-15 1996-09-17 Chunghwa Picture Tubes, Ltd. Cathode ray tube with misconvergence compensation
KR100596229B1 (ko) * 1998-09-29 2006-09-20 엘지전자 주식회사 컬러 음극선관 전자총

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639796A (en) * 1968-03-11 1972-02-01 Sony Corp Color convergence system having elongated magnets perpendicular to plane of plural beams
FR2313832A1 (fr) * 1975-06-06 1976-12-31 Videon Sa Procede et dispositif d'elimination des defauts de groupement des faisceaux electroniques dans un tube cathodique couleur a canons coplanaires
DE2612607C3 (de) * 1976-03-25 1984-01-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Statische Konvergenzkorrekturvorrichtung in Farbfernsehbildwiedergaberöhren
JPS5559637A (en) * 1978-10-30 1980-05-06 Hitachi Ltd Magnetic focus cathode ray tube
DE3003197A1 (de) * 1980-01-30 1981-08-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Vorrichtung zum einstellen der elektronenstrahlen einer farbbildroehre
GB2079530B (en) * 1980-07-02 1985-04-11 Hitachi Ltd Magnetic focussing arrangement in a cathode ray tube

Also Published As

Publication number Publication date
EP0095617A3 (en) 1984-10-17
CA1202059A (fr) 1986-03-18
EP0095617A2 (fr) 1983-12-07
DE3219954A1 (de) 1983-12-01
DE3374625D1 (en) 1987-12-23
JPS58218732A (ja) 1983-12-20
US4625144A (en) 1986-11-25
CA1206321A (fr) 1986-06-24

Similar Documents

Publication Publication Date Title
DE2226335C3 (de) Dreistrahl-Farbfernsehbildröhre mit einer verstellbaren Magnetanordnung zur Strahljustierung
AT391380B (de) Selbstkonvergierendes ablenkjoch
DE1300962B (de) Ablenksystem fuer Farbfernsehbildroehren mit mehreren Elektronenstrahlen
DE2521491C3 (de) Mit vereinfachter Konvergenz arbeitende Farbbildwiedergabeeinrichtung
DE3122160C2 (fr)
DE2726586B2 (de) Farbverzeichnungs-Korrekturvorrichtung für Farbbildröhre
DD217364A5 (de) Farbbildroehre
DE2901168C3 (de) Ablenkanordnung für eine Farbfernsehbildröhre
DE2639605C3 (de) Ablenkjoch für eine In-Line-Kathodenstrahlröhre
EP0095617B1 (fr) Tube-image couleurs comprenant des moyens de correction des défauts de torsion
DE3445518C2 (de) Farbbildröhre mit einem Inline-Elektronenstrahlerzeugungssystem, das Bauteile zur Komakorrektur enthält
DE2736162C2 (fr)
DD143489A5 (de) Farbfernsehbildroehre mit inline-strahlerzeugungssystem
DE69517377T2 (de) Ablenkjoch und mit dem Ablenkjoch versehene Farbkathodenstrahlröhre
DE3132834A1 (de) Ablenkjoch fuer kathodenstrahlroehre
DE2738173A1 (de) Ablenkjochsystem fuer farbfernsehempfaenger
EP0138264B1 (fr) Tube-image couleurs
DE3043048C2 (fr)
DE69704978T2 (de) Kompensierungsvorrichtung für Kathodenstrahlröhre-Rasterverzerrungen
DE69407026T2 (de) Anzeigegerät mit Ablenkeinheit
DE3140826C2 (de) Farbfernsehwiedergabesystem unter Verwendung permeabler Korrekturglieder für ein Ablenkjoch
DE2224097B2 (de) Farbbildwiedergabeeinrichtung und verfahren zu ihrer justierung
DD262107A5 (de) Farbbildroehre mit inline-strahlsystem und komakorrektur
EP0180272A1 (fr) Procédé d'obtention d'une configuration magnétique multipolaire permanente mis en oeuvre dans la fabrication d'un tube à rayons cathodiques et dispositif prévu à cet effet
DE2523842A1 (de) Horizontalkonvergenzvorrichtung fuer inline-katodenstrahlroehren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19841128

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT

Owner name: ALCATEL N.V.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3374625

Country of ref document: DE

Date of ref document: 19871223

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT

Owner name: ALCATEL N.V.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

NLS Nl: assignments of ep-patents

Owner name: NOKIA GRAETZ GMBH TE PFORZHEIM, BONDSREPUBLIEK DUI

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;NOKIA GRAETZ GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: NOKIA UNTERHALTUNGSELEKTRONIK (DEUTSCHLAND) GMBH T

ITPR It: changes in ownership of a european patent

Owner name: CAMBIO RAGIONE SOCIALE;NOKIA ( DEUTSCHLAND ) GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

ITTA It: last paid annual fee
NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: NOKIA (DEUTSCHLAND) GMBH TE PFORZHEIM, BONDSREPUBL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

NLS Nl: assignments of ep-patents

Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020508

Year of fee payment: 20

Ref country code: FR

Payment date: 20020508

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020529

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020628

Year of fee payment: 20

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20030511

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20030511