EP0195993A2 - 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

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Publication number
EP0195993A2
EP0195993A2 EP86103550A EP86103550A EP0195993A2 EP 0195993 A2 EP0195993 A2 EP 0195993A2 EP 86103550 A EP86103550 A EP 86103550A EP 86103550 A EP86103550 A EP 86103550A EP 0195993 A2 EP0195993 A2 EP 0195993A2
Authority
EP
European Patent Office
Prior art keywords
layer
neck
cone
picture tube
color picture
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
EP86103550A
Other languages
German (de)
English (en)
Other versions
EP0195993A3 (en
EP0195993B1 (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
Standard Elektrik Lorenz AG
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, Standard Elektrik Lorenz AG 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

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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
    • H01J9/20—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 color picture tube according to the preamble of claim 1 and to a method for producing the color picture tube.
  • Such 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 evaporable material, for example consists 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.
  • the invention has for its object to provide 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
  • Another object is to provide a simple method of making such color picture tubes.
  • 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. to which the tub-mask combination 14 is melted later.
  • the first conductive layer on the inner surface of the cone 1 is drawn with surface punctuation and is provided with the reference symbol 4.
  • This layer 4 extends to the melting line 5 between the neck 2 and the cone 1.
  • a second layer 6 which is hatched.
  • 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 TiO 2 , Al 2 O 3 SiO 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 constituents are, for example, polyvinylpyrrolidone, 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 a surface dot).
  • the anode contact in the cone 1 is blown free (not shown) and then the first conductive layer 4 is dried.
  • the drying is carried out according to FIG. 3 with infrared radiator 10, only one of which 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 wet layer 4 below the melting line 5 in the neck 2 can, at a predetermined distance h, also by a appropriate setting of the heating power of the infrared radiator can be effected.
  • 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 into the neck 2 from below, at the upper end of which the suspension 6a (hatched) 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 area 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 removal of the tube 11, this layer is dried in the neck 2.
  • the neck can, for example, be exposed to the air flow from a heating fan (not shown).
  • the area to be left free from the second layer 6 in the neck 2 becomes on 5 for example by rinsing with alkali metal 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. Finally, 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)
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
DE3511211 1985-03-28
DE19853511211 DE3511211A1 (de) 1985-03-28 1985-03-28 Farbbildroehre mit einer inneren leitenden schicht und verfahren zur herstellung der farbbildroehre

Publications (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736737A2 (fr) * 1995-04-07 1996-10-09 Fujikoki Mfg. Co., Ltd. Vanne de détente et système frigorifique

Families Citing this family (11)

* 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
JP4388603B2 (ja) * 1997-02-07 2009-12-24 エス アール アイ・インターナショナル 弾性誘電体ポリマフィルム音波アクチュエータ
US7608989B2 (en) * 1999-07-20 2009-10-27 Sri International Compliant electroactive polymer transducers for sonic applications
WO2009006318A1 (fr) 2007-06-29 2009-01-08 Artificial Muscle, Inc. Transducteurs polymères électroactifs pour des applications de rétroaction sensorielle
EP2239793A1 (fr) 2009-04-11 2010-10-13 Bayer MaterialScience AG Montage de film polymère électrique commutable et son utilisation
US9553254B2 (en) 2011-03-01 2017-01-24 Parker-Hannifin Corporation Automated manufacturing processes for producing deformable polymer devices and films
EP2689284A4 (fr) 2011-03-22 2014-08-20 Bayer Ip Gmbh Système lenticulaire à actionneur à polymère électroactif
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
US9590193B2 (en) 2012-10-24 2017-03-07 Parker-Hannifin Corporation Polymer diode

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322445A1 (fr) * 1975-09-01 1977-03-25 Philips Nv Procede pour la realisation d'un tube a rayons cathodiques a surface interieure conductrice, dispositif pour la mise en oeuvre dudit procede et tube ainsi realise
US4031597A (en) * 1976-09-22 1977-06-28 Rca Corporation Method of assembling a mount assembly in the neck of a cathode-ray tube
JPS5676140A (en) * 1979-11-26 1981-06-23 Toshiba Corp Manufacture of cathode-ray tube

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322445A1 (fr) * 1975-09-01 1977-03-25 Philips Nv Procede pour la realisation d'un tube a rayons cathodiques a surface interieure conductrice, dispositif pour la mise en oeuvre dudit procede et tube ainsi realise
US4031597A (en) * 1976-09-22 1977-06-28 Rca Corporation Method of assembling a mount assembly in the neck of a cathode-ray tube
JPS5676140A (en) * 1979-11-26 1981-06-23 Toshiba Corp Manufacture of cathode-ray tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 141 (E-73)(813), 5. September 1981; & JP-A-56 076 140 (TOKYO SHIBAURA DENKI K.K.) 23-06-1981 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736737A2 (fr) * 1995-04-07 1996-10-09 Fujikoki Mfg. Co., Ltd. Vanne de détente et système frigorifique
EP0736737A3 (fr) * 1995-04-07 1997-07-23 Fuji Koki Mfg Vanne de détente et système frigorifique
US6164624A (en) * 1995-04-07 2000-12-26 Fujikoki Mfg. Co., Ltd. Expansion valve and refrigerating system
US6513340B2 (en) 1995-04-07 2003-02-04 Fujikoki Corporation Expansion valve and refrigerating system

Also Published As

Publication number Publication date
US4762733A (en) 1988-08-09
DE3511211A1 (de) 1986-10-09
JPS61227349A (ja) 1986-10-09
DE3668395D1 (de) 1990-02-22
EP0195993A3 (en) 1987-11-19
CA1270889A (fr) 1990-06-26
US4827185A (en) 1989-05-02
EP0195993B1 (fr) 1990-01-17

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