EP0205166B1 - Bildwiedergabevorrichtung - Google Patents

Bildwiedergabevorrichtung Download PDF

Info

Publication number
EP0205166B1
EP0205166B1 EP86107963A EP86107963A EP0205166B1 EP 0205166 B1 EP0205166 B1 EP 0205166B1 EP 86107963 A EP86107963 A EP 86107963A EP 86107963 A EP86107963 A EP 86107963A EP 0205166 B1 EP0205166 B1 EP 0205166B1
Authority
EP
European Patent Office
Prior art keywords
frame
reproduction device
image reproduction
side surfaces
sealing compound
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
EP86107963A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0205166A2 (de
EP0205166A3 (en
Inventor
Kurt-Manfred Tischer
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.)
Panasonic Holdings Corp
Original Assignee
Nokia Unterhaltungselektronik Deutschland GmbH
Nokia Graetz 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 Graetz GmbH filed Critical Nokia Unterhaltungselektronik Deutschland GmbH
Publication of EP0205166A2 publication Critical patent/EP0205166A2/de
Publication of EP0205166A3 publication Critical patent/EP0205166A3/de
Application granted granted Critical
Publication of EP0205166B1 publication Critical patent/EP0205166B1/de
Expired legal-status Critical Current

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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/87—Means for avoiding vessel implosion
    • H01J2229/875—Means substantially covering the output face, e.g. resin layers, protective panels

Definitions

  • the invention relates to an image display device according to the preamble of claim 1.
  • DE-AS 1 187 742 discloses a method for producing a coating from a plastic sheet on the end face of a cathode ray tube.
  • the cathode ray tube has a cone with a piston neck as the back and a curved shield trough on the front.
  • the plastic sheet is applied to the outside of the curved screen trough to protect against implosion.
  • a tension band is placed around the circumference of the tube and provided with a tensile stress of approximately 450 kg.
  • This type of implosion protection is only possible with image display devices with a curved screen trough with side parts.
  • the implosion security is achieved in that the prestressed glass system of the image display device is brought into a tension-free state by mechanical pressure due to the tensioning band.
  • a cathode ray tube with a curved front plate which has no side walls.
  • the front plate is connected at the edge of its inside to the side wall of the cone of the cathode ray tube.
  • a tensile frame is present around the side surfaces of the front panel, which has the shape of the edge of the front panel and is attached to the front panel with the aid of an adhesive, preferably an epoxy adhesive.
  • the frame can have a lip that covers a narrow area of the outside of the curved front plate.
  • a cathode ray tube which has a flat front pane. This windshield is connected to the side wall of the tube cone at the edge of its inside. Protection against implosion is not available.
  • the invention has for its object to provide an implosion protection for such an image display device.
  • the image display device contains on the back a metallic trough 1, the edges 2 of which are angled outwards and serve as a support for a spacer frame 3.
  • the flat glass front panel 4 carrying the fluorescent screen is arranged on the spacer frame 3.
  • the cathodes, the control structure and the luminescent layer are not shown since these details are not required for the description of the protection against implosion in the image display device.
  • the fluorescent screen 4 carries a security film 5, the edge of which extends as far as the side faces 9 of the front screen 4.
  • the security film 5 can be glued to the entire surface or only on the side faces 9 of the front pane 4.
  • An acrylate can be used as an adhesive.
  • a safety film is a film that is elastic and can hold back glass parts if the front window breaks.
  • the security film may for example be made of polyester (polyethylene terephthalate) and 25 to 60 in 1 thick. Such a security film is available under the name "Security film Tesa 4592".
  • a frame 6 is loosely placed around the front pane 4, the upper edge of which is bent in the direction of the outer surface 10 of the front pane 4 and which projects somewhat onto the outer surface 10 of the front pane.
  • the space between the frame 6 and the side surfaces 9 of the windshield or the security film 5 is filled with a tough elastic potting compound 7.
  • the potting compound 7 can for example consist of polyurethane. Since the security film 5 is usually not scratch-resistant and solvent-resistant, it is covered by a thin glass pane 8.
  • the security film 5 or the glass pane 8 can be colored and thus serve as a contrast pane.
  • the edge of the frame 6 which is bent toward the outer surface 10 of the fluorescent screen 4 can leave an intermediate space with the security film 5, which is then filled by the sealing compound 7.
  • the wheel of the frame 6 can, however, as shown on the left side of the windshield 4, rest directly on the security film.
  • the potting compound 7 can be introduced from below into the space between the front pane 4 and the frame 6. Holes 11 through which the sealing compound 7 is introduced can also be present in the frame 6.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Transforming Electric Information Into Light Information (AREA)
EP86107963A 1985-06-14 1986-06-11 Bildwiedergabevorrichtung Expired EP0205166B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853521315 DE3521315A1 (de) 1985-06-14 1985-06-14 Bildwiedergabevorrichtung
DE3521315 1985-06-14

Publications (3)

Publication Number Publication Date
EP0205166A2 EP0205166A2 (de) 1986-12-17
EP0205166A3 EP0205166A3 (en) 1987-12-23
EP0205166B1 true EP0205166B1 (de) 1989-08-30

Family

ID=6273241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107963A Expired EP0205166B1 (de) 1985-06-14 1986-06-11 Bildwiedergabevorrichtung

Country Status (5)

Country Link
US (1) US4709272A (ja)
EP (1) EP0205166B1 (ja)
JP (1) JPH0754674B2 (ja)
CA (1) CA1270891A (ja)
DE (2) DE3521315A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126909A1 (de) * 1991-08-14 1993-02-18 Ibm Plattenfoermiges teil mit einer an den seitenflaechen umlaufenden dichtung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63198243A (ja) * 1987-02-12 1988-08-16 Mitsubishi Electric Corp 防爆形陰極線管
GB8713715D0 (en) * 1987-06-11 1987-07-15 Renishaw Plc Workpiece inspection method
US5074644A (en) * 1987-09-18 1991-12-24 Pioneer Electronic Corporation Rear projection television
EP0387738A1 (en) * 1989-03-13 1990-09-19 Matsushita Electric Industrial Co., Ltd. Flat panel display device
US4992881A (en) * 1989-04-14 1991-02-12 Honeywell Inc. Protective cover for flight instrument filter glass
US5072301A (en) * 1990-03-12 1991-12-10 Zenith Electronics Corporation Apparatus and process for implosion protection in cathode ray tubes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3009017A (en) * 1953-05-22 1961-11-14 Libbey Owens Ford Glass Co Laminated television screen
BE624427A (ja) * 1961-11-13
NL280647A (ja) * 1963-07-05 1964-12-10
FR1477706A (fr) * 1966-03-10 1967-04-21 Saint Gobain Perfectionnement à la fabrication des tubes cathodiques, notamment pour la télévision en couleurs
US4016364A (en) * 1975-10-20 1977-04-05 Zenith Radio Corporation Color television picture tubes with improved implosion protection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126909A1 (de) * 1991-08-14 1993-02-18 Ibm Plattenfoermiges teil mit einer an den seitenflaechen umlaufenden dichtung

Also Published As

Publication number Publication date
DE3521315A1 (de) 1986-12-18
JPS61288356A (ja) 1986-12-18
EP0205166A2 (de) 1986-12-17
DE3665377D1 (en) 1989-10-05
JPH0754674B2 (ja) 1995-06-07
EP0205166A3 (en) 1987-12-23
US4709272A (en) 1987-11-24
CA1270891A (en) 1990-06-26

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