EP0137373B1 - Elektronenstrahlerzeugungssystem für Mehrfachkathodenstrahlröhren, wie Farbbildröhren - Google Patents

Elektronenstrahlerzeugungssystem für Mehrfachkathodenstrahlröhren, wie Farbbildröhren Download PDF

Info

Publication number
EP0137373B1
EP0137373B1 EP84111219A EP84111219A EP0137373B1 EP 0137373 B1 EP0137373 B1 EP 0137373B1 EP 84111219 A EP84111219 A EP 84111219A EP 84111219 A EP84111219 A EP 84111219A EP 0137373 B1 EP0137373 B1 EP 0137373B1
Authority
EP
European Patent Office
Prior art keywords
electrode
electron
segments
expansion coefficient
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
EP84111219A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0137373A1 (de
Inventor
Hans Dr. Reule
Hartmut Gänzle
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
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 EP0137373A1 publication Critical patent/EP0137373A1/de
Application granted granted Critical
Publication of EP0137373B1 publication Critical patent/EP0137373B1/de
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
    • H01J29/48—Electron guns
    • H01J29/484—Eliminating deleterious effects due to thermal effects, electrical or magnetic fields; Preventing unwanted emission

Definitions

  • the invention relates to an electron beam generation system for multiple cathode ray tubes, such as color picture tubes, with cathodes and a plurality of electrodes which follow one another and lie one behind the other in the electron beam direction, at least one of which has a substantially greater spatial dimension in the electron beam direction than the other electrodes and consists of at least two segments and in which the electrodes are made of different materials.
  • At least the first three electrodes are made of different materials when viewed in the beam direction.
  • the coefficients of thermal expansion of the materials of the electrodes are increasingly staggered from the cathode to the screen such that the changes in distance in the beam direction between the adjacent openings of the electrodes, through which the electron beams pass, decrease linearly when the electrode beam generation system is at operating temperature.
  • This measure ensures that the voltages occurring in the electron beam generating system as a result of its heating to such high temperatures are as low as possible and that the electron-optical lenses present between the electrodes can have the most undisturbed effect on the electron beams.
  • the offset between an electrode opening in the electrode G3 of an external electron beam and the corresponding electrode opening in the Electrode G4 with a center distance of the electrode openings of 6.6 mm is approximately 1.5 ⁇ m.
  • the displacement of the light spots generated by the two outer electron beams in a color picture tube with each other, that is, the red and blue light spots then thus amounts to about 0.4 mm in the center of the screen. This is a clearly visible t misconvergence.
  • any remaining misconvergence in the steady state of the color picture tube i.e. when their electron gun has reached operating temperature, can be corrected in a known manner with a convergence unit.
  • this misconvergence that occurs during the heating phase is of course undesirable.
  • the object on which the invention is based is therefore to further develop the known electron beam generation system in such a way that the least possible offset between the electrodes occurs in the heating phase and that any offset that does occur is below the interference limit.
  • the electrodes G2 and G4 adjacent to the larger electrode G3 and the segments of the larger electrode G3 adjacent to these electrodes consist of materials with different coefficients of thermal expansion such that the material of the electrode segment adjacent to electrode G4 has a smaller coefficient of thermal expansion than that Material of the electrode G4 and the material of the electrode segment adjacent to the electrode G2 has a greater or the same coefficient of thermal expansion than the material of the electrode G2.
  • the electron gun is designed in this way, there will be less offset between the electrodes during its heating-up period and / or the period in which misconvergence will occur due to the offset is shorter than in the known electron gun systems, so that the convergence correction required is less is and can be done much sooner.
  • FIGS. 1 to 3 A “unitized gun” electron beam generating system for a “inline” color picture tube is illustrated in FIGS. 1 to 3.
  • Such an electron beam generation system has - as can be clearly seen from FIG. 3 - an approximately rectangular cross section and, arranged parallel to one another on a line, contains three electron beam generation systems which are each intended to excite the red, green and blue light spots on the screen of the color picture tube.
  • the electron gun has three individual cathodes 1 and electrodes G1, G2, G3 and G4.
  • the electrodes consist either of individual (G1, G2 and G4) or of several, composite, pot-shaped metal bodies with an edge, which are melted into the glass rods 3 either at the edges or on additional holding parts 2 connected to the electrodes or segments.
  • the electrode G3 has the greatest length of all electrodes and is composed of the electrode segments 4, 5, 6 and 7.
  • further electrode segments 8 and 9 are present within the electrode segments 6 and 7.
  • the electrode segments forming the electrode G3 are connected to one another in a non-positive and / or positive manner. As a rule, the connection is made by spot welding.
  • the electrodes are provided with openings through which the electron beams emanating from the cathodes 1 pass on their way to the screen.
  • the openings in the same electrode or in the same electrode segment are arranged on a line next to one another and at the same distance from one another, as illustrated in FIG. 3. This distance at room temperature is denoted by Q.
  • the openings of different electrodes have a different diameter; however, they are arranged concentrically to a common axis of symmetry. Since the electrodes have different electrical potentials during operation of the color picture tube, electron-optical lenses are formed between them, which influence the path of the electron beams.
  • the invention deals with the changes in the electron-optical lenses due to the different expansions of the electrodes during the heating phase of the electrode beam generation system to the operating temperature, which lead to the misconvergences already mentioned at the beginning.
  • the cathodes have a temperature of approximately 760 ° C. in the operating state.
  • the electrode G2 has a temperature of approximately 150 ° C, the electrode segment 4 a temperature of approximately 100 ° C, the electrode segment 7 a temperature of approximately 85 ° C and the electrode G4 a temperature of approximately 70 ° C.
  • the convergence errors in the heating phase of the color picture tube can be very greatly reduced if different materials are used for the electrodes G4 and G2 and the electrode segments 7 and 4 in the manner according to the invention. Materials are used which have a coefficient of thermal expansion between 1.0 x 10- 5 ° C -1 and 1.7 x 10- 5 ° C- 'at the application temperatures between 20 ° C and 150 ° C.
  • an austenitic stainless steel As a material with the coefficient of thermal expansion of 1.7 x 10- 5 ° C- 1, an austenitic stainless steel has in embodiments been found suitable, of the 16-20 wt .-% Cr, 8-12 wt .-% Ni and remainder iron. This material is not ferromagnetic at room temperature.
  • a series of austenitic steels are useful whose thermal expansion coefficient is 1.7 to 1.9 x 10- 5 ° C-. 1
  • a nickel-chromium-iron alloy can be used, which, from 72 wt .-% Ni 14-21 wt .-% CR and max 10% FE.
  • alloys which contain approximately 80% by weight of Ni and approximately 20% by weight of Cr or whose composition consists of approximately 65% by weight of Ni, approximately 30% by weight of Cr and a maximum 1 wt .-% Fe exists. These alloys are also not ferromagnetic at room temperature.
  • Materials which are ferromagnetic at room temperature such as an alloy of 48-54% by weight of Ni, a maximum of 2% by weight of Cr and the rest of Fe or with approximately 72% by weight of Fe and can also be used for the electrode G2 approx. 28% by weight Cr.
  • the electrode segment 7 consists of a material with 80% by weight Ni and 20% by weight Cr, then the electrode segments 4, 5 and 6 can consist of an austenitic chromium-nickel steel.
  • electrode segments 7 and 9 are formed in several parts, such as the part of the electrode G3 consisting of the electrode segments 7, 8 and 9, then it is advantageous if all the electrode segments consist of the same material. However, it is possible that there are only slight deviations if the electrode segments 8 and 9 are made from a material with a slightly different temperature expansion coefficient than that of the electrode segment 7 from a material with> 72% by weight Ni, 14-21% by weight. % Cr and> 10 wt .-% Fe and the electrode segments 8 and 9 consist of an austenitic chromium-nickel steel.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
EP84111219A 1983-09-22 1984-09-20 Elektronenstrahlerzeugungssystem für Mehrfachkathodenstrahlröhren, wie Farbbildröhren Expired EP0137373B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3334242 1983-09-22
DE19833334242 DE3334242A1 (de) 1983-09-22 1983-09-22 Elektronenstrahlerzeugungssystem fuer mehrfachkathodenstrahlroehren, wie farbbildroehren

Publications (2)

Publication Number Publication Date
EP0137373A1 EP0137373A1 (de) 1985-04-17
EP0137373B1 true EP0137373B1 (de) 1988-01-27

Family

ID=6209756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111219A Expired EP0137373B1 (de) 1983-09-22 1984-09-20 Elektronenstrahlerzeugungssystem für Mehrfachkathodenstrahlröhren, wie Farbbildröhren

Country Status (5)

Country Link
US (1) US4631442A (pt)
EP (1) EP0137373B1 (pt)
JP (1) JPS6095836A (pt)
CA (1) CA1216016A (pt)
DE (2) DE3334242A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2553035B2 (ja) * 1985-06-19 1996-11-13 株式会社日立製作所 カラ−受像管用電子銃
JP2815169B2 (ja) * 1989-03-18 1998-10-27 株式会社日立製作所 インライン型電子銃
US5010271A (en) * 1989-10-24 1991-04-23 Rca Licensing Corporation Color picture tube having an electron gun with reduced convergence drift
US4952186A (en) * 1989-10-24 1990-08-28 Rca Licensing Corporation Method of making a color picture tube electron gun with reduced convergence drift

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642560C2 (de) * 1976-09-22 1983-08-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Farbbildkathodenstrahlröhre
NL7902159A (nl) * 1979-03-20 1980-09-23 Philips Nv Kleurentelevisiebeeldbuis.
DE2920151C2 (de) * 1979-05-18 1985-04-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Elektronenstrahlerzeugungssystem für Kathodenmehrstrahlröhren
JPS56130063A (en) * 1980-03-17 1981-10-12 Mitsubishi Electric Corp Electron gun electrode
JPS56153652A (en) * 1980-04-30 1981-11-27 Toshiba Corp Electron gun frame for color cathode-ray tube

Also Published As

Publication number Publication date
DE3334242A1 (de) 1985-04-04
DE3469103D1 (en) 1988-03-03
CA1216016A (en) 1986-12-30
JPH0410697B2 (pt) 1992-02-26
US4631442A (en) 1986-12-23
JPS6095836A (ja) 1985-05-29
EP0137373A1 (de) 1985-04-17

Similar Documents

Publication Publication Date Title
DE2534912A1 (de) Fokussierlinsenanordnung fuer den elektronenstrahl einer kathodenstrahlroehre
DE2801916A1 (de) Fernsehbildroehre
EP0137373B1 (de) Elektronenstrahlerzeugungssystem für Mehrfachkathodenstrahlröhren, wie Farbbildröhren
DE2917268C2 (pt)
DE2811355C2 (de) Elektrostatisches Elektronen-Linsensystem
EP0019249B1 (de) Elektronenstrahl-Erzeugungssystem für Kathodenmehrstrahlröhren
DE3743985C2 (de) Kathodenstrahlröhre
DE3407197C2 (de) Kathodenstrahlröhre
DE3125977C2 (pt)
DE2642560C2 (de) Farbbildkathodenstrahlröhre
DE4230207A1 (de) Elektronenkanone fuer eine farbkathodenstrahlroehre
DE3106846C2 (de) Kompensierte Ablenkeinrichtung für einen Farbfernsehempfänger mit Inline-Bildröhre
DE2832687A1 (de) Farbbildkathodenstrahlroehre
DE3216039C2 (de) Elektronenstrahl-Erzeugungssystem einer Kathodenstrahlröhre
DE69302794T2 (de) Farbkathodenstrahlröhre
DE2913162C2 (de) In-line-Elektronenstrahlerzeugersystem für eine Farbbildröhre
AT393760B (de) Kathodenstrahlroehre
DE1965498C3 (de) Kathodenstrahlrohre
DE3013044A1 (de) Fernsehbildroehre mit einem elektronenstrahlsystem, das nichtkreisfoermige oeffnungen hat
DD232374A5 (de) Elektronenstrahlroehre
DE2264113A1 (de) Elektronenkanone fuer kathodenstrahlroehren
DE3123301C2 (de) Vorrichtung zum Einstellen von Elektronenstrahlen einer Kathodenstrahlröhre
DE4235306C2 (de) Kathodenstrahlröhre mit kombinierter dynamischer Fokussierungs-Korrektur und dynamischer Astigmatismus-Korrektur
DE2835576A1 (de) Ablenkeinheit fuer eine in-line-farbbildroehre
DE19624657A1 (de) Elektronenkanone für eine Farbkathodenstrahlröhre

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

RTI1 Title (correction)
17P Request for examination filed

Effective date: 19850712

17Q First examination report despatched

Effective date: 19870326

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

Owner name: STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT

Owner name: ALCATEL N.V.

ITF It: translation for a ep patent filed

Owner name: AVV. ANTONIO PETRUZZELLI

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

REF Corresponds to:

Ref document number: 3469103

Country of ref document: DE

Date of ref document: 19880303

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.

ET Fr: translation filed
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: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

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

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

ITTA It: last paid annual fee
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: FR

Payment date: 20020910

Year of fee payment: 19

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

Ref country code: GB

Payment date: 20020918

Year of fee payment: 19

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

Ref country code: DE

Payment date: 20020925

Year of fee payment: 19

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

Ref country code: NL

Payment date: 20020930

Year of fee payment: 19

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 NON-PAYMENT OF DUE FEES

Effective date: 20030920

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 NON-PAYMENT OF DUE FEES

Effective date: 20040401

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030920

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040528

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20040401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST