EP0412983A1 - Fernsehkathodenröhre - Google Patents

Fernsehkathodenröhre

Info

Publication number
EP0412983A1
EP0412983A1 EP19890905103 EP89905103A EP0412983A1 EP 0412983 A1 EP0412983 A1 EP 0412983A1 EP 19890905103 EP19890905103 EP 19890905103 EP 89905103 A EP89905103 A EP 89905103A EP 0412983 A1 EP0412983 A1 EP 0412983A1
Authority
EP
European Patent Office
Prior art keywords
picture tube
television picture
panel
funnel
prior
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.)
Withdrawn
Application number
EP19890905103
Other languages
English (en)
French (fr)
Inventor
Kurt-Manfred Tischer
Eberhard Nill
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
Nokia 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, Nokia Deutschland GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0412983A1 publication Critical patent/EP0412983A1/de
Withdrawn legal-status Critical Current

Links

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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/263—Sealing together parts of vessels specially adapted for cathode-ray tubes
    • 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
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof

Definitions

  • the present invention relates to a television picture tube comprising a funnel and a flat glass panel placed on, and joined to the edge of, the funnel.
  • a television picture tube of this kind is known (DE-C2-29 20 930). It turned out that when the television picture tube has been evacuated, the originally flat panel is deformed concavely under the external atmospheric pressure. This effect increases as the thickness of the panel decreases or if the panel is made of light glass or laminated sheet glass.
  • the use of laminated sheet glass in television picture tubes is disclosed in US-A-4,483,452.
  • the technical problem to be solved by the invention is to improve the prior art television picture tube in such a manner that it has a flat panel after its evacuation.
  • the amount of the convex precurving of the panel is to be such that the panel will be flat after the evacuation of the television picture tube.
  • the proper dimensioning of the convex curvature as a function of the data of the panel can be determined by experiments.
  • Fig. 1 is a schematic cross section of a finished television picture tube in accordance with the invention.
  • Fig. 2 is a schematic cross section of the television picture tube of Fig. 1 prior to evacuation.
  • the television picture tube consists of the funnel 1 and the flat panel 2.
  • the funnel 1 and the panel 2 are fritsealed together at the edge 3.
  • Fig. 2 differs from Fig. 1 only in that the television picture tube shown has not been evacuated yet. In this condition, the panel 2 is curved convexly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP19890905103 1988-04-22 1989-04-21 Fernsehkathodenröhre Withdrawn EP0412983A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813524 1988-04-22
DE19883813524 DE3813524A1 (de) 1988-04-22 1988-04-22 Fernsehbildroehre

Publications (1)

Publication Number Publication Date
EP0412983A1 true EP0412983A1 (de) 1991-02-20

Family

ID=6352609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890905103 Withdrawn EP0412983A1 (de) 1988-04-22 1989-04-21 Fernsehkathodenröhre

Country Status (3)

Country Link
EP (1) EP0412983A1 (de)
DE (1) DE3813524A1 (de)
WO (1) WO1989010625A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840590A1 (de) * 1998-09-05 2000-03-09 Brigitte Kobilarov Konkave Bildschirm-Frontscheibe für PCs und Fernsehgeräte

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187036A (en) * 1986-02-21 1987-08-26 Philips Electronic Associated Cathode ray tube

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910625A1 *

Also Published As

Publication number Publication date
WO1989010625A1 (en) 1989-11-02
DE3813524A1 (de) 1989-11-02

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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

17P Request for examination filed

Effective date: 19900927

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT NL

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

Owner name: NOKIA (DEUTSCHLAND) GMBH

17Q First examination report despatched

Effective date: 19930831

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940804