EP0426237A2 - Procédé de détection de l'insuffisance de vide dans les tubes de télévision - Google Patents

Procédé de détection de l'insuffisance de vide dans les tubes de télévision Download PDF

Info

Publication number
EP0426237A2
EP0426237A2 EP90202833A EP90202833A EP0426237A2 EP 0426237 A2 EP0426237 A2 EP 0426237A2 EP 90202833 A EP90202833 A EP 90202833A EP 90202833 A EP90202833 A EP 90202833A EP 0426237 A2 EP0426237 A2 EP 0426237A2
Authority
EP
European Patent Office
Prior art keywords
tube
voltage
tubes
television picture
procedure
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
EP90202833A
Other languages
German (de)
English (en)
Other versions
EP0426237B1 (fr
EP0426237A3 (en
Inventor
André Bolz
Hermann Dr. Wehr
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.)
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics 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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0426237A2 publication Critical patent/EP0426237A2/fr
Publication of EP0426237A3 publication Critical patent/EP0426237A3/de
Application granted granted Critical
Publication of EP0426237B1 publication Critical patent/EP0426237B1/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
    • H01J9/42—Measurement or testing during manufacture

Definitions

  • the invention relates to a method for selecting television picture tubes with too low a vacuum during manufacture.
  • it is important to discard all picture tubes with too low a vacuum in good time during the production process so that they are not changed by further production steps, e.g. gettering, in such a way that repairing / regenerating these tubes is made difficult or impossible becomes.
  • the invention is therefore based on the object of designing a method of the type mentioned in such a way that it works simply and safely and the selection of the tubes is practically not falsified by insulation currents.
  • This object is achieved according to the invention in that between the anode (g4) and a second electrode (g3) of the tube a direct voltage which rises continuously from a low value to a maximum value is applied, the rise of which is stopped when a (spark) or discharge) current flows and the associated value of the DC voltage is evaluated as a criterion for the selection of the tube.
  • the insulation currents within the tube base are not included in the measurement result and the measurement circuit can be constructed much more simply, since it is not a small current that has to be measured at a constant applied voltage, but only the point in time (and the associated voltage value) to which a current in the tube begins to flow.
  • the focusing electrode (g3) is preferably used as the second electrode.
  • the second and all further electrodes are preferably connected to ground potential.
  • the figure shows schematically an apparatus for performing the method according to the invention and a television picture tube connected to it.
  • the device 1 consists of a voltage generator 2 which generates a DC voltage which rises continuously from a low value to a maximum value and which is applied between the anode (g4) and the focusing electrode (g3) of the tube 4.
  • the focusing electrode is connected to earth potential together with all other electrodes (g3) filtered out on the base of the tube.
  • a detection circuit 3 is inserted, which emits a signal S in its output as soon as a current flows in the tube between the anode (g4) and the focusing electrode (g3) and causes the voltage U does not continue to rise.
  • the voltage U of the voltage generator 2 rises to its maximum value at a rate of approximately 3 kV / sec.
  • the voltage U generated by the voltage generator 2 is set such that, at its maximum value (for example 20 kV) in a tube with a good vacuum, no current flows between the anode (g4) and the focusing electrode (g3), which current in the detection circuit 3 leads to a signal at its output S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP90202833A 1989-10-28 1990-10-24 Procédé de détection de l'insuffisance de vide dans les tubes de télévision Expired - Lifetime EP0426237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936015 1989-10-28
DE3936015A DE3936015A1 (de) 1989-10-28 1989-10-28 Verfahren zum selektieren von fernsehbildroehren mit zu niedrigem vakuum

Publications (3)

Publication Number Publication Date
EP0426237A2 true EP0426237A2 (fr) 1991-05-08
EP0426237A3 EP0426237A3 (en) 1991-11-21
EP0426237B1 EP0426237B1 (fr) 1994-05-18

Family

ID=6392473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202833A Expired - Lifetime EP0426237B1 (fr) 1989-10-28 1990-10-24 Procédé de détection de l'insuffisance de vide dans les tubes de télévision

Country Status (4)

Country Link
US (1) US5083957A (fr)
EP (1) EP0426237B1 (fr)
JP (1) JPH03165422A (fr)
DE (2) DE3936015A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE142367T1 (de) * 1992-12-17 1996-09-15 Philips Electronics Nv Verfahren zum aushärten eines filmes
DE19526394A1 (de) * 1995-07-19 1997-01-23 Siemens Ag Verfahren zum Vakuumnachweis in betriebsmäßig eingebauten Vakuumschaltröhren
US6722184B2 (en) 2001-09-13 2004-04-20 Guide Corporation Apparatus and method for pressurized oxygen bulb curing and testing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1592364A (en) * 1921-04-26 1926-07-13 Western Electric Co Ionization manometer
US4052776A (en) * 1976-09-30 1977-10-11 Zenith Radio Corporation Method of spot-knocking an electron gun assembly in a color television picture tube
JPS63261649A (ja) * 1987-04-20 1988-10-28 Hitachi Ltd 陰極線管の高電圧処理方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU656126A1 (ru) * 1976-06-23 1979-04-05 Рязанский Радиотехнический Институт Схема дл измерени давлени в отпа нных электровакуумных приборах
JPS6273526A (ja) * 1985-09-27 1987-04-04 Hitachi Ltd けい光ランプの封入ガス圧力測定方法
US4720652A (en) * 1987-01-20 1988-01-19 Cooper Industries, Inc. Sealed beam headlamp and method for testing its serviceability

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1592364A (en) * 1921-04-26 1926-07-13 Western Electric Co Ionization manometer
US4052776A (en) * 1976-09-30 1977-10-11 Zenith Radio Corporation Method of spot-knocking an electron gun assembly in a color television picture tube
JPS63261649A (ja) * 1987-04-20 1988-10-28 Hitachi Ltd 陰極線管の高電圧処理方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS Bd. 37, Nr. 1, 3. Januar 1964, MC.GRAW-HILL NEW YORK Seiten 89 - 91; FRED KOHLER: 'PRODUCTION TECHNIQUES TUBE IS OWN VACUUM GAGE ' *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 81 (E-719)(3429) 23. Februar 1989 & JP-A-63 261 649 (HITACHI LTD ) 28. Oktober 1988 *

Also Published As

Publication number Publication date
US5083957A (en) 1992-01-28
JPH03165422A (ja) 1991-07-17
DE3936015A1 (de) 1991-05-02
DE59005734D1 (de) 1994-06-23
EP0426237B1 (fr) 1994-05-18
EP0426237A3 (en) 1991-11-21

Similar Documents

Publication Publication Date Title
EP0104577B1 (fr) Procédé pour tester sans contact un objet, particulièrement un microcâblage avec une sonde à rayons corpusculaires
EP0189777A1 (fr) Méthode de mesure par faisceau de particules pour le test sans contact de circuits
DE1943140B2 (de) Verfahren zum analysieren des oberflaechenpotentials eines prueflings
EP0508062A1 (fr) Méthode et dispositif pour tester un arrangement de conducteurs électriques
DE69207441T2 (de) Verfahren zur Reinigung einer Vakuumröhre zum Ausstrahlen von Röntgenstrahlen
DE1690575B2 (de) Verfahren und einrichtung zur automatischen, lagemaessigen zentrierung eines elektronenstrahls
DE19650542A1 (de) Dreidimensionales Quadrupolmassenspektrometer
EP0309852A1 (fr) Procédé et appareil de contrôle du vide dans un interrupteur à vide
EP0426237B1 (fr) Procédé de détection de l'insuffisance de vide dans les tubes de télévision
EP0285896A2 (fr) Procédé pour l'essai des réseaux de lignes
DE69515094T2 (de) Lichtbogenunterdrückung für eine Feldemissionsvorrichtung
DE3430984A1 (de) Verfahren und vorrichtung zur registrierung von teilchen oder quanten mit hilfe eines detektors
EP0472938A2 (fr) Dispositif pour tester et réparer un circuit intégré
DE202004020402U1 (de) Vorrichtung zur Erkennung von Störlichtbögen
EP0232790A1 (fr) Procédé et dispositif pour mesurer des signaux en fonction du temps avec une sonde à rayon corpusculaire
DE900876C (de) Anordnung zur Wiedergabe von Haeufigkeitskurven mittels einer Braunschen Roehre
EP0060337B1 (fr) Microscope électronique à balayage
DE2853677C2 (de) Schaltung für ein Ionisationsvakuummeter
DE19963308A1 (de) Erzeugungsvorrichtung für geladene Teilchen
DE683751C (de) Verfahren zur Erzeugung von Ablenkspannungen bzw. -stroemen mit Hilfe eines Sekundaerelektronenverstaerkers
DE2110220A1 (de) Einrichtung zum Nachweisen von Teilchen
EP0219557A1 (fr) Procédé et dispositif de vérification de la connexion d'un signal de mesure dans un dispositif de mesure
EP0762457A2 (fr) Procédé et dispositif de signalisation de disjoncteurs en utilisant un ensemble d'électrodes
DE833372C (de) Schaltung fuer selbsttaetige Signalsysteme
DE3733107A1 (de) Verfahren und vorrichtung zum vakuumnachweis bei gekapselten vakuumschaltroehren, insbesondere bei sf(pfeil abwaerts)6(pfeil abwaerts)-isolierten schaltanlagen

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

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

17P Request for examination filed

Effective date: 19920521

17Q First examination report despatched

Effective date: 19930625

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

REF Corresponds to:

Ref document number: 59005734

Country of ref document: DE

Date of ref document: 19940623

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

Effective date: 19940801

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

ITPR It: changes in ownership of a european patent

Owner name: CAMBIO RAGIONE SOCIALE;PHILIPS ELECTRONICS N.V.

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

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

Ref country code: GB

Payment date: 19970930

Year of fee payment: 8

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

Ref country code: FR

Payment date: 19971021

Year of fee payment: 8

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

Ref country code: DE

Payment date: 19971219

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

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: 19981024

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

Effective date: 19981024

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: 19990630

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: DE

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

Effective date: 19990803

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

Effective date: 20051024