EP0195993B1 - Procédé de fabrication d'un tube image couleur comportant une couche conductrice intérieure - Google Patents

Procédé de fabrication d'un tube image couleur comportant une couche conductrice intérieure Download PDF

Info

Publication number
EP0195993B1
EP0195993B1 EP86103550A EP86103550A EP0195993B1 EP 0195993 B1 EP0195993 B1 EP 0195993B1 EP 86103550 A EP86103550 A EP 86103550A EP 86103550 A EP86103550 A EP 86103550A EP 0195993 B1 EP0195993 B1 EP 0195993B1
Authority
EP
European Patent Office
Prior art keywords
layer
neck
cone
picture tube
conductive layer
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 - Lifetime
Application number
EP86103550A
Other languages
German (de)
English (en)
Other versions
EP0195993A3 (en
EP0195993A2 (fr
Inventor
Norbert Dr. Thiel
Volker Gerstle
Rolf Dr. Zondler
Otto Lederle
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
Nokia Unterhaltungselektronik Deutschland GmbH
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 Nokia Unterhaltungselektronik Deutschland GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0195993A2 publication Critical patent/EP0195993A2/fr
Publication of EP0195993A3 publication Critical patent/EP0195993A3/de
Application granted granted Critical
Publication of EP0195993B1 publication Critical patent/EP0195993B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/88—Coatings
    • H01J2229/882—Coatings having particular electrical resistive or conductive properties

Definitions

  • the invention relates to a method for producing a color picture tube with an inner conductive layer.
  • a color picture tube is known from DE-OS 27 42 751, in which the conductive layer on the inner surface of the cone consists of graphite, iron oxide and a silicate binder.
  • the entire inner surface of the neck of the color picture tube is coated with a film of vaporizable material, which consists for example of polyvinyl alcohol. This film serves to protect the neck when inserting the electron beam system. After attaching the electron beam system, any film in the throat is evaporated.
  • the conductive layer In order to avoid flashovers between the conductive layer in the cone, which is at a high electrical potential, and the electron gun system, the conductive layer must have a sharply delimited dividing line from the areas that remain free.
  • the layer thickness must be very even and very smooth in the area between the covered and uncovered areas, since otherwise material of the layer will easily crumble off at bead-like transitions, especially if the centering springs and contact springs of the electron gun system are pushed over this limit.
  • DE-OS 29 03 735 a method for applying the conductive layer on the cone of a color picture tube is known.
  • the areas to be left free are first covered with a lacquer film, then the conductive layer is applied and finally the lacquer film is washed off.
  • a method for producing a color picture tube with an inner conductive layer in which the layer is given a smooth edge by drying that part of the layer which is to remain in the tube during the Part that is to be removed later is kept moist and washed off later.
  • the invention has for its object to provide a method for producing a color picture tube with a conductive layer on the inner surface of the cone, which has a sharp and scratch-resistant dividing line to the neck of the color picture tube.
  • the cone 1 is shown with the melted neck 2 of a color picture tube 13, which also has a tub-mask combination 14 (slightly raised and shown in dashed lines) and a base 15.
  • the fritting surface is denoted by 3, to which the tub / mask combination 14 is later melted.
  • the first conductive layer on the inner surface of the cone 1 is drawn with surface dots and is provided with the reference number 4.
  • This layer 4 extends as far as the melting line 5 between the neck 2 and the cone 1.
  • the boundary between this second layer 6 and the uncoated area in the neck 2 is provided with the reference number 7.
  • the second layer 6 can extend beyond the melting line 5 and cover the first layer 4 in this area.
  • Layer 4 contains no organic constituents and consists, for example, of a graphite suspension, into which iron powder or other non-conductive inorganic constituents for adjusting the electrical resistance, such as Ti0 2 , A1 2 0 3 , Si0 2 , are mixed and which has been provided with a silicate binder.
  • Layer 6 consists of the suspension of layer 4, to which organic constituents have also been added.
  • the organic components are, for example, polyvinyl pyrrole. don, PVA, casein, polyvinyl acetate.
  • the method for producing the color picture tube according to FIG. 1 is described below with reference to FIGS. 2 to 5.
  • the well cleaned cone 1 with the neck 2 is provided with the first conductive layer by one of the known methods.
  • the first layer 4 is made by casting with the aid of a pipe end 9 guided along the boundary 8.
  • the entire inner surface of the cone 1 and the entire inner surface of the neck 2 are covered with this layer (drawn with surface dots).
  • the anode contact in the cone 1 is blown free (not shown) and then the first conductive layer 4 is dried.
  • 3 is done with infrared radiators 10, of which only one is shown.
  • the distance h between the lower edge of the infrared radiator 10 and the fritting surface 3 is chosen so that the layer 4 dries between the boundary 8 and the melting line 5 and remains wet between the melting line 5 and the free neck end.
  • the layer 4 remaining below the melting line 5 in the neck 2 can, at a predetermined distance h, also be brought about by appropriately adjusting the heating power of the infrared radiator.
  • the layer 4 that remains wet below the melting line 5 is then removed by rinsing the neck 2 with the suspension of the later second layer.
  • a tube 11 is inserted from below into the neck 2, at the upper end of which the suspension 6a (drawn with hatching) of the later second layer emerges. The free end of the tube 11 projects somewhat beyond the melting line 5.
  • the dried layer 4 is also somewhat washed over in the transition region from the cone 1 to the neck 2, but not washed off. Only the first layer which remains wet below the melting line 5 is removed and replaced by the suspension of the second layer. After removing the tube 11, this layer is dried in the neck 2.
  • the neck for example, can be exposed to the air flow from a heater fan (not shown).
  • the area to be left free from the second layer 6 in the neck 2 is then carried out according to FIG. 5, for example by rinsing with alkali hydroxides, in particular with a 5-10% sodium hydroxide solution and subsequent cleaning with a wiper 12 and water.
  • a 0.5-2% sodium hydroxide solution is preferably used for rinsing.
  • This can be followed by a neck cleanse with hydrofluoric acid.
  • the neck 2 is rinsed inside and outside with demineralized water.
  • a ring brush (not shown) can be used for external cleaning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (6)

1. Procédé pour la fabrication d'un tube image en couleurs avec une couche conductrice sur la surface intérieure de son cône: caractérisé par les opérations suivantes:
- application d'une première couche conductrice sans composants organiques sur la face intérieure du cône et du collet;
- séchage de la première couche dans la zone du cône;
- enlèvement de la première couche restée humide dans le collet par rinçage avec une suspension, composée de la suspension de la première couche avec une addition de composants organiques et simultanément
- application d'une deuxième couche sur la face intérieure du collet;
- séchage de la deuxième couche dans le collet;
- enlèvement de la deuxième couche dans le collet des surfaces devant rester libres;
- nettoyage de la face intérieure du collet et
- rinçage de la face intérieure et extérieure du collet.
2. Procédé selon la revendication 1, caractérisé en ce que le séchage de la première couche dans le cône est réalisé par irradiation avec de la lumière infrarouge.
3. Procédé selon la revendication 2, caractérisé en ce que la ligne de séparation entre la zone à sécher et celle qui doit rester humide de la première couche dans le cône est réalisée par réglage de la distance entre le radiateur à rayons infrarouges et le cône.
4. Procédé selon la revendication 1, caractérisé en ce que l'addition est du polyvinylpyrrolidone.
5. Procédé selon la revendication 1, caractérisé en ce que la ligne de séparation entre la première (4) et la deuxième couche (6) coincide avec la ligne de fondage (5) entre le collet (2) et la cône (1).
6. Procédé selon la revendication 1, caractérisé en ce que la deuxième couche (6) recouvre un peu la première couche (4).
EP86103550A 1985-03-28 1986-03-17 Procédé de fabrication d'un tube image couleur comportant une couche conductrice intérieure Expired - Lifetime EP0195993B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853511211 DE3511211A1 (de) 1985-03-28 1985-03-28 Farbbildroehre mit einer inneren leitenden schicht und verfahren zur herstellung der farbbildroehre
DE3511211 1985-03-28

Publications (3)

Publication Number Publication Date
EP0195993A2 EP0195993A2 (fr) 1986-10-01
EP0195993A3 EP0195993A3 (en) 1987-11-19
EP0195993B1 true EP0195993B1 (fr) 1990-01-17

Family

ID=6266540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103550A Expired - Lifetime EP0195993B1 (fr) 1985-03-28 1986-03-17 Procédé de fabrication d'un tube image couleur comportant une couche conductrice intérieure

Country Status (5)

Country Link
US (2) US4762733A (fr)
EP (1) EP0195993B1 (fr)
JP (1) JPS61227349A (fr)
CA (1) CA1270889A (fr)
DE (2) DE3511211A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8602717A (nl) * 1986-10-29 1988-05-16 Philips Nv Werkwijze voor het vervaardigen van een electronenstraalbuis en aldus vervaardigde electronenstraalbuis.
JPH05225932A (ja) * 1992-02-17 1993-09-03 Sony Corp 透過型扁平陰極線管
JPH08334280A (ja) * 1995-04-07 1996-12-17 Fuji Koki Seisakusho:Kk 膨張弁及び冷凍システム
WO1998035529A2 (fr) * 1997-02-07 1998-08-13 Sri International Actionneur sonique a film polymere dielectrique elastomere
US7608989B2 (en) * 1999-07-20 2009-10-27 Sri International Compliant electroactive polymer transducers for sonic applications
JP5602626B2 (ja) 2007-06-29 2014-10-08 アーティフィシャル マッスル，インク． 感覚性フィードバック用途のための電気活性ポリマートランスデューサー
EP2239793A1 (fr) 2009-04-11 2010-10-13 Bayer MaterialScience AG Montage de film polymère électrique commutable et son utilisation
WO2012118916A2 (fr) 2011-03-01 2012-09-07 Bayer Materialscience Ag Procédés de fabrication automatisés pour la production de dispositifs et de films polymères déformables
KR20140019801A (ko) 2011-03-22 2014-02-17 바이엘 인텔렉쳐 프로퍼티 게엠베하 전기활성 중합체 작동기 렌티큘라 시스템
EP2828901B1 (fr) 2012-03-21 2017-01-04 Parker Hannifin Corporation Procédés de fabrication de rouleau à rouleau pour la production de dispositifs à polymère électroactif autoréparant
KR20150031285A (ko) 2012-06-18 2015-03-23 바이엘 인텔렉쳐 프로퍼티 게엠베하 연신 공정을 위한 연신 프레임
WO2014066576A1 (fr) 2012-10-24 2014-05-01 Bayer Intellectual Property Gmbh Diode polymère

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7510274A (nl) * 1975-09-01 1977-03-03 Philips Nv Werkwijze voor het vervaardigen van een kathode- straalbuis met een inwendige geleidende bedek- king, inrichting voor het uitvoeren van de werk- wijze en buis verkregen volgens deze werkwijze.
US4031597A (en) * 1976-09-22 1977-06-28 Rca Corporation Method of assembling a mount assembly in the neck of a cathode-ray tube
US4124540A (en) * 1976-11-04 1978-11-07 Gte Sylvania Incorporated Resistive electrical conductive coating for use in a cathode ray tube
DE2903735A1 (de) * 1979-02-01 1980-08-07 Standard Elektrik Lorenz Ag Verfahren zum aufbringen einer schicht in kathodenstrahlroehren
JPS5630240A (en) * 1979-08-22 1981-03-26 Hitachi Ltd Color picture tube
JPS5676140A (en) * 1979-11-26 1981-06-23 Toshiba Corp Manufacture of cathode-ray tube
US4254160A (en) * 1979-12-17 1981-03-03 Rca Corporation Method for slurry coating a faceplate panel having a peripheral sidewall
NL8300914A (nl) * 1983-03-14 1984-10-01 Philips Nv Elektrische ontladingsbuis en werkwijze voor het vervaardigen van een elektrisch geleidende laag op een wandgedeelte van de omhulling van een dergelijke buis.

Also Published As

Publication number Publication date
US4827185A (en) 1989-05-02
DE3511211A1 (de) 1986-10-09
JPS61227349A (ja) 1986-10-09
US4762733A (en) 1988-08-09
EP0195993A3 (en) 1987-11-19
DE3668395D1 (de) 1990-02-22
EP0195993A2 (fr) 1986-10-01
CA1270889A (fr) 1990-06-26

Similar Documents

Publication Publication Date Title
EP0195993B1 (fr) Procédé de fabrication d'un tube image couleur comportant une couche conductrice intérieure
DE2401333A1 (de) Verfahren zur herstellung von isolierfilmen auf verbindungsschichten
DE1540175A1 (de) Elektrische Widerstaende und Verfahren zu ihrer Herstellung
DE3824706A1 (de) Aus einer keramischen farbschicht und einer leitfaehigen schicht gebildete schichtstruktur
DE2147604A1 (de) Verfahren zum Beschichten einer Glasfläche mit einem leitenden Belag
DE2933820C2 (de) Vakuumschalter
EP0726581B1 (fr) Procédé de fabrication d'un isolateur
DE1910736C3 (de) Verfahren zum Herstellen von gegeneinander elektrisch isolierten, aus Aluminium bestehenden Leiterbahnen und Anwendung des Verfahrens
DE2637754A1 (de) Verfahren zur herstellung einer kathodenstrahlroehre mit einem inneren leitenden ueberzug, vorrichtung zum durchfuehren dieses verfahrens und durch dieses verfahren hergestellte roehre
DE2357397C3 (de) Verfahren zum Herstellen einer Sekundärelektronenemission vermindernden Schicht auf dem metallisierten Leuchtschirm von Farbbildröhren
DE2522971C2 (de) Elektrodenanordnung für eine Farbfernsehaufnahmeröhre
DE2858702C2 (fr)
DE2243980C3 (de) Verfahren zur Wärmebehandlung der Glassubstrate von Gasentladungsanzeigevorrichtungen
DE1298629B (de) Elektrischer Kondensator und Verfahren zu seiner Herstellung
DE2400665A1 (de) Verfahren zur herstellung eines lotabweisenden schutzes auf leiterplatten mit durchgehenden loechern
DE3702663A1 (de) Elektrische mehrfachkondensatoranordnung
DE1946987A1 (de) Elektrische Steckvorrichtung
DE2332724A1 (de) Herstellungsverfahren fuer kathodenstrahlroehren-leuchtschirm
AT212923B (de) Kappe zur Herstellung der Leiteranschlüsse an den Kommutator einer elektrischen Maschine
DE963454C (de) Verfahren zur Herstellung elektrischer Heizelemente
DE2338178C2 (de) Verfahren zum Erhöhen der Isolationsfestigkeit von Aluminiumoxidüberzügen und Verwendung des Verfahrens
DE1083854B (de) Verfahren zur Herstellung einer Bildspeicherelektrode
DE2543079A1 (de) Verfahren zum herstellen von festkoerperkondensatoren
DE2347410B2 (de) Elektrolytkondensator mit einer glashuelle
DE2364248C3 (de) Verfahren zum Entfernen eines Überzuges von einem Kathodenstrahlröhrenmaskenteil

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

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19871223

17Q First examination report despatched

Effective date: 19880331

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

Owner name: NOKIA GRAETZ GESELLSCHAFT MIT BESCHRAENKTER HAFTUN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

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

Owner name: NOKIA UNTERHALTUNGSELEKTRONIK (DEUTSCHLAND) GMBH

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

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3668395

Country of ref document: DE

Date of ref document: 19900222

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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
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

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

Ref country code: GB

Payment date: 19940308

Year of fee payment: 9

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

Ref country code: FR

Payment date: 19940329

Year of fee payment: 9

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

Ref country code: NL

Payment date: 19940331

Year of fee payment: 9

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

Ref country code: DE

Payment date: 19940511

Year of fee payment: 9

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

Ref country code: GB

Effective date: 19950317

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

Ref country code: NL

Effective date: 19951001

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

Effective date: 19950317

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: 19951130

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

Effective date: 19951001

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

Ref country code: DE

Effective date: 19951201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050317