EP0030704A2 - Dispositif de magnétisation d'un ensemble de convergence pour tube-image couleur en ligne - Google Patents

Dispositif de magnétisation d'un ensemble de convergence pour tube-image couleur en ligne Download PDF

Info

Publication number: EP0030704A2
Authority: EP; European Patent Office
Prior art keywords: coils; axes; neck; electron; magnetic
Prior art date: 1979-12-12
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

EP80107753A

Other languages

German (de)

English (en)

Other versions

EP0030704A3 (en

EP0030704B1 (fr

Inventor

Erhard Kienle

Walter Kornaker

Felix Greiner

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.)

1979-12-12

Filing date

1980-12-09

Publication date

1981-06-24

1980-12-09 Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp

1981-06-24 Publication of EP0030704A2 publication Critical patent/EP0030704A2/fr

1982-03-03 Publication of EP0030704A3 publication Critical patent/EP0030704A3/de

1985-03-27 Application granted granted Critical

1985-03-27 Publication of EP0030704B1 publication Critical patent/EP0030704B1/fr

Status Expired legal-status Critical Current

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Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances

Definitions

the invention relates to a device for magnetizing a convergence device for inline color picture tubes and methods for convergence with this device.
Color picture tubes usually have a screen with phosphors of three different colors. Each type of phosphor is excited to glow by one of three electron beams emitted by an electron gun system. Color picture tubes in which the three electron guns of the electron gun system are arranged in one plane are referred to as inline color picture tubes. In such inline tubes, a so-called shadow mask is attached between the electron gun system and the luminescent screen, through the slit-shaped openings of which the electron beams strike the phosphor regions. For the inline color picture tube to operate properly, it is necessary for all three electron beams to cross each other in a mask slot over the entire mask area. In order to achieve this common crossover, the electron beams in the electron gun system are deflected by static magnetic fields. The setting of the magnetic fields required for this is called the convergence setting.
the convergence is set by rotating pre-magnetized magnetic rings, which are arranged on the outside around the neck of the tube above the electron gun system.
DE-PS 961 735 it is already known to arrange a permanent magnetic material in the interior of the tube neck in order to deflect an electron beam and to magnetize or remagnetize it from the outside in a targeted manner.
the invention relates to magnetizing devices of the latter type.
DE-OS 28 28 710 discloses devices and methods which are suitable for magnetizing and remagnetizing hard magnetic materials for setting the convergence.
FIGS. 11 and 12 show the images of two devices in which eight coils are arranged radially around a tube neck.
the coils are connected to each other so that the two, four and six-pole fields required for adjustment can be achieved. It has been shown that only small deflections of the electron beams are possible with such devices.
DE-OS 28 32 666 a magnetizing device is shown in Figure 2, in which the magnetic coils are arranged one behind the other in two planes in the beam direction.
the number of coils can be increased considerably, which leads to stronger magnetic fields that can be achieved and thus greater pre-deflection.
All deflection fields for electron beams not only change the direction of the electron beam, but also its shape. For the beam shape of the electron beams, it has proven to be unfavorable to carry out the preliminary deflection in two different planes.
Vorablenkun g is the electron made to adjust the convergence of a convergence device, but task these facilities, it is also to make the pre-deflection for color purity E instel- development. To adjust the color purity, it is necessary that all three electron beams are shifted together in the horizontal direction. The two-pole fields required for this are obtained in the magnetizing devices described above by appropriate switching of the radially arranged, electrically excitable magnetic coils. Deviating from this, DE-OS 28 32 667 describes a magnetizing device in which the color purity setting is arranged around the tube neck
the invention is based on the object of specifying a magnetizing device for the purpose described, which allows the electron beams to be influenced very strongly with the least possible change in beam shape.
the shape of the coils is adapted to the shape of the converging device through cross sections of the magnetic coils with unequal diameters.
the fact that all coil axes lie in the plane of the convergence device ensures that the beam shape changes are as small as possible.
Novel deflection systems extend over such a long area of the neck that they still cover a large part of the electron gun system. Therefore, so far it has been necessary to converge and adjust color purity before attaching the deflection system to the tube.
the fields of a proposed magnetizing device are so strong that the hard magnetic material attached in the tube neck can be magnetized or remagnetized even through the already installed deflection system.
1 denotes the convergence device made of magnetically hard magnetic material.
This is an explosive magnetic ring arranged inside a tube neck.
This ring is arranged concentrically around the middle electron beam.
the electron beam direction is designated z.
the ring is located in the convergence plane, which is perpendicular to the z-axis.
Figure 1 shows a representation of the wire ring in the direction of view of the convergence device level, which is why the wire ring 1 appears only as a line.
an electrically excitable magnet coil 2 with a rectangular cross section is shown, the longitudinal axis of which lies in the viewing direction.
the long diameter of the rectangular cross section lies in the convergence plane. It can be seen that the coil shape is well adapted to the shape of the convergence device.
the inner diameter of a round coil 3 is drawn in with a broken line, which surrounds the same surface as the rectangular coil. It is easy to imagine from the figure that a homogeneous field can be achieved with the rectangular coil over the entire convergence device. In the case of the round coil, on the other hand, edge regions of the convergence device will be located in the inhomogeneous edge field of the coil.
the diameter of the round coil 3 had to be increased considerably. This would, however, only achieve a considerably weaker field with the same current flow through the coil. The maximum current flow is limited by the available voltage sources. Because of the better adaptation of the coil shape to the shape of the convergence device, a considerably higher field strength can therefore be achieved when a certain voltage source is present. It is essential, however, that all parts of the convergence device to be magnetized are located in a plane existing perpendicular to the beam axis.
a magnetizing device Around the neck 6 six coils 7 are disposed with radial, in each case less than 60 0 to each other coil axes in a first circuit. Two of the coil axes are on the x axis. These coils are operated in such a way that they generate a six-pole field, through which the two outer electron beams can be displaced together in the y direction against the central electron beam. In a second radius followed by six more coils 8, also having in each case by 60 0 offset against each other, radially disposed coils. Two of the six axes of the coils are on the y-axis.
the four coils 9 are operated in such a way that a four-pole field is generated with which the outer beams can be displaced in the y direction relative to one another, but which leaves the central electron beam unaffected.
the four coils 10, on the other hand, are operated in such a way that a four-pole field is created, by means of which the two outer electron beams are displaced relative to one another in the x direction, but which also leaves the central electron beam unaffected.
the arrangement of the coils for the four-fol Fields can also be done along two circular radii analogous to the six-fol coils.
the coils required for convergence adjustment were arranged along circles with different radii. However, elongated coils are required to adjust the color purity, which ensure an identical, homogeneous field at the location of all three electron beams.
the axes of the color purity coils coincide with the y-axis.
the two color purity coils arranged in the y direction above and below the coils described so far are operated in such a way that a two-pole field is created which shifts all three electron beams together by the same amount in the x direction.
the color purity coils are designated 11. Corresponding to the joint displacement of all three electron beams in the x direction, a common preliminary deflection of all three electron beams in the y direction is often desired for the raster adjustment.
two additional raster correction coils 12 are shown in FIG. 2, the axes of which coincide with the x-axis, and which are located in the x-direction to the left and right of the convergence coils.
the two coils 12 are also operated so that a two-pole field is created.
All coils have a rectangular cross-section.
the long diameters of the color purity coils 11 and the raster correction coils 12 are approximately twice to three times as long as the diameter of the convergence device in the x or y direction.
the long diameters of the convergence coils arranged in circles are each so large that all the coils on a circle fill this circle.
the small diameter of all coils is about 1 cm.
the color purity and raster correction coils each have 95 turns of a 0.5 2 copper wire.
the other coils each have 150 turns of a 0.25 2
Coils belonging to a basic deflection movement are connected in series and excited with a capacitor of approx. 200 ⁇ F with a maximum of ⁇ 500 V.
the achievable deflections lead to displacements of up to ⁇ ls mm on the screen of the color picture tube.
the magnetizing device described so far it is possible to deflect the two outer electron beams together or against one another, with the central electron beam unaffected.
the set magnetic field is impressed into the material of the converging device which can be magnetized and remagnetized using a method which is also customary for use in the magnetizing devices previously described.
the imprinting of the set magnetic field into the permanent magnetic material of the convergence device is therefore not discussed in more detail here.
FIG. 3 shows a further embodiment of a magnetizing device according to the invention, with which an outer electron beam can be set essentially independently of the middle and the other outer electron beam.
a permanent magnetic wire ring 3 in a tube neck 6 is again shown as a convergence device. All dimensions of FIG. 3 correspond to a magnetizing device, such as is used to magnetize a permanent magnetic material arranged in the inside of the neck of a so-called thick-necked tube with an outside diameter of approximately 36 mm.
the structure and mode of operation of the color purity correction coils 11 and raster correction coils 12 correspond entirely to those described in FIG. 2. In Figure 3, however, the developed magnetic coils are shown only on the right and above, while below and left only the plastic winding body are shown.
the field profile at the location of the right outer electron beam therefore essentially runs in the y direction, which causes a shift of this electron beam in the x direction. Since the magnetic field falls square to the distance from the coils, the middle and the other outer electron beam are hardly influenced.
the shift of an outer electron beam in the y-direction is shown using the left outer electron beam of FIG. 3.
a coil, the axis of which coincides with the x-axis, is electrically excited, as a result of which the coil forms a magnetic north and south pole.
the magnetic lines of such a coil close in a known manner via the outer field of the coil.
the left outer electron beam is in a magnetic field extending in the x direction, which results in pre-deflection in the y direction.
the coil arrangements for deflecting an outer electron beam each in the x or y direction have so far only been explained for one side of the magnetizing device.
the magnetizing device is symmetrical in its mode of operation and in its coil structure with respect to the x and y-axis, so that both outer electron beams can be deflected individually independently of one another and independently of the central electron beam in the x or y direction.
FIG. 4 shows a plan view of a winding body as used in FIG. 3 for applying the coils for raster correction and for the independent deflection of an external electron beam in the x and y directions.
the distance between the winding body or the coil made therefrom from the tube neck 6 and from the convergence device 1 is also shown in FIG.
the electrical design of the pillar 12 shape corresponds to that described in FIG.
a magnetizing device is suitable for magnetizing the permanent magnetic material of a converging device arranged inside a tube neck. Exactly the same structures, but only with enlarged geometric dimensions, can be used if permanent magnetic materials arranged around the outside of the tube neck have to be magnetized or remagnetized, or if the permanent magnetic material is arranged inside the tube neck, but still between the tube neck and the magnetizing device Parts of a deflection system. It is a particular advantage of the magnetizing devices according to the invention that permanent magnetic material arranged inside parts of a deflection system inside a tube neck can also be magnetized and remagnetized.

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Video Image Reproduction Devices For Color Tv Systems (AREA)
Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

EP80107753A 1979-12-12 1980-12-09 Dispositif de magnétisation d'un ensemble de convergence pour tube-image couleur en ligne Expired EP0030704B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE2949851A DE2949851C2 (de)	1979-12-12	1979-12-12	Vorrichtung zum Magnetisieren einer Konvergenzeinrichtung für Inline-Farbbildröhren
DE2949851		1979-12-12

Publications (3)

Publication Number	Publication Date
EP0030704A2 true EP0030704A2 (fr)	1981-06-24
EP0030704A3 EP0030704A3 (en)	1982-03-03
EP0030704B1 EP0030704B1 (fr)	1985-03-27

Family

ID=6088181

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP80107753A Expired EP0030704B1 (fr)	1979-12-12	1980-12-09	Dispositif de magnétisation d'un ensemble de convergence pour tube-image couleur en ligne

Country Status (6)

Country	Link
US (1)	US4395692A (fr)
EP (1)	EP0030704B1 (fr)
JP (1)	JPS6057652B2 (fr)
CA (1)	CA1169116A (fr)
DE (1)	DE2949851C2 (fr)
FI (1)	FI70096C (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3271630D1 (en) *	1982-03-31	1986-07-17	Ibm	Convergence unit for in-line colour cathode ray tube
JPS6222351A (ja) *	1985-07-19	1987-01-30	Mitsubishi Electric Corp	コンバ−ゼンス副調整装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NL170683C (nl) *	1975-04-01	1982-12-01	Philips Nv	Werkwijze voor het vervaardigen van een statische convergentie-eenheid en een kleurenbeeldbuis voorzien van een convergentie-eenheid, vervaardigd onder toepassing van die werkwijze.
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
NL7707476A (nl) *	1977-07-06	1979-01-09	Philips Nv	Werkwijze voor het vervaardigen van een kleuren- beeldbuis en kleurenbeeldbuis vervaardigd vol- gens die werkwijze.
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
US4138628A (en) *	1977-07-26	1979-02-06	Rca Corporation	Magnetizing method for use with a cathode ray tube
US4162470A (en) *	1977-07-26	1979-07-24	Rca Corporation	Magnetizing apparatus and method for producing a statically converged cathode ray tube and product thereof
SU741349A1 (ru) *	1978-11-21	1980-06-15	Львовский Ордена Ленина Политехнический Институт	Магнитна отклон юща система
DE2907898A1 (de) *	1979-03-01	1980-09-11	Steingroever Erich Dr Ing	Vielpolige vorrichtung und verfahren zum magnetisieren von ringfoermigen dauermagneten

1979
- 1979-12-12 DE DE2949851A patent/DE2949851C2/de not_active Expired
1980
- 1980-12-08 US US06/214,408 patent/US4395692A/en not_active Expired - Lifetime
- 1980-12-09 EP EP80107753A patent/EP0030704B1/fr not_active Expired
- 1980-12-11 CA CA000366599A patent/CA1169116A/fr not_active Expired
- 1980-12-11 FI FI803861A patent/FI70096C/fi not_active IP Right Cessation
- 1980-12-12 JP JP55174744A patent/JPS6057652B2/ja not_active Expired

Also Published As

Publication number	Publication date
CA1169116A (fr)	1984-06-12
EP0030704A3 (en)	1982-03-03
JPS6057652B2 (ja)	1985-12-16
DE2949851C2 (de)	1982-09-09
JPS5693245A (en)	1981-07-28
US4395692A (en)	1983-07-26
FI803861L (fi)	1981-06-13
FI70096B (fi)	1986-01-31
DE2949851A1 (de)	1981-06-19
FI70096C (fi)	1986-09-12
EP0030704B1 (fr)	1985-03-27

Legal Events

Date	Code	Title	Description
1981-04-25	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
1981-06-24	AK	Designated contracting states	Designated state(s): BE FR GB IT NL
1981-12-29	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1982-03-03	AK	Designated contracting states	Designated state(s): BE FR GB IT NL
1982-09-22	17P	Request for examination filed	Effective date: 19820708
1984-10-16	ITF	It: translation for a ep patent filed
1985-01-26	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1985-03-27	AK	Designated contracting states	Designated state(s): BE FR GB IT NL
1985-07-12	ET	Fr: translation filed
1985-12-31	BECA	Be: change of holder's address	Free format text: 850327 *ALCATEL N.V.STRAWINSKYLAAN 537, NL-1077 XX AMSTERDAM
1985-12-31	BECH	Be: change of holder	Free format text: 850327 *ALCATEL N.V.
1986-01-24	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1986-01-24	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1986-03-12	26N	No opposition filed
1987-09-11	REG	Reference to a national code	Ref country code: FR Ref legal event code: TP
1987-11-04	REG	Reference to a national code	Ref country code: GB Ref legal event code: 732
1988-01-18	NLS	Nl: assignments of ep-patents	Owner name: ALCATEL N.V. TE AMSTERDAM.
1988-07-14	ITPR	It: changes in ownership of a european patent	Owner name: CESSIONE;ALCATEL N.V.
1989-02-03	REG	Reference to a national code	Ref country code: FR Ref legal event code: TP
1989-03-08	REG	Reference to a national code	Ref country code: GB Ref legal event code: 732
1989-04-03	NLS	Nl: assignments of ep-patents	Owner name: NOKIA GRAETZ GMBH TE PFORZHEIM, BONDSREPUBLIEK DUI
1989-07-21	ITPR	It: changes in ownership of a european patent	Owner name: CESSIONE;NOKIA GRAETZ GMBH
1989-12-31	BECA	Be: change of holder's address	Free format text: 890630 *NOKIA GRAETZ G.M.B.H.:OSTLICHE KARL-FRIEDRICH-STR. 132, D-7530 PFORZHEIM
1990-09-14	REG	Reference to a national code	Ref country code: FR Ref legal event code: CD
1990-10-01	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
1991-12-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: BE Payment date: 19911230 Year of fee payment: 12
1992-06-29	ITPR	It: changes in ownership of a european patent	Owner name: CAMBIO RAGIONE SOCIALE;NOKIA ( DEUTSCHLAND ) GMBH
1992-09-18	REG	Reference to a national code	Ref country code: FR Ref legal event code: CD
1992-12-31	ITTA	It: last paid annual fee
1992-12-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: BE Effective date: 19921231
1993-06-30	BERE	Be: lapsed	Owner name: NOKIA (DEUTSCHLAND) G.M.B.H. Effective date: 19921231
1993-08-16	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, BONDESREPUB
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