EP0184831A2 - Tube image plat - Google Patents

Tube image plat Download PDF

Info

Publication number
EP0184831A2
EP0184831A2 EP85115766A EP85115766A EP0184831A2 EP 0184831 A2 EP0184831 A2 EP 0184831A2 EP 85115766 A EP85115766 A EP 85115766A EP 85115766 A EP85115766 A EP 85115766A EP 0184831 A2 EP0184831 A2 EP 0184831A2
Authority
EP
European Patent Office
Prior art keywords
display device
image display
fluorescent screen
flat
screen
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Withdrawn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
EP85115766A
Other languages
German (de)
English (en)
Other versions
EP0184831A3 (fr
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.)
Nokia Deutschland GmbH
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG, Nokia Graetz GmbH filed Critical Standard Elektrik Lorenz AG
Publication of EP0184831A2 publication Critical patent/EP0184831A2/fr
Publication of EP0184831A3 publication Critical patent/EP0184831A3/fr
Withdrawn legal-status Critical Current

Links

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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
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof

Definitions

  • the invention relates to a flat image display device according to the preamble of claim 1.
  • Such a flat picture display device is known from the publication "The flat television screen” in the Funkschau 1980, issue 10, pp. 63 to 66, picture 2.
  • This has a glass front plate coated with phosphorus on the inside, a digitally addressable control structure for shaping and modulating the electron current, a surface cathode sending a uniform electron current in the direction of the control structure and a rear metal encapsulation in order to seal the entire arrangement under vacuum.
  • the metal encapsulation has a circumferential flange on which the edge area of the front plate rests.
  • the front plate must be made relatively thick, which increases the weight of the known image display device.
  • a thick layer of glass has an unfavorable influence on the viewing of the generated image.
  • the invention has for its object to improve an image display device of the type mentioned in such a way that safe operation is guaranteed.
  • the fluorescent screen By designing the fluorescent screen as a tub, an implosion protection can be arranged in a simple manner on the side walls of this tub.
  • the fluorescent screen can consist of inexpensive pressed glass and be made relatively thin. The slight outer curvature of the luminescent screen also contributes to increased safety, without the inner surface deviating from its flat shape
  • the image display device has a metallic, flat piston 1, the edge 2 of which ends in a circumferential flange 3.
  • bushings 5 for the electrical leads 6 of the flat cathode 7 are provided in the bottom 4 of the piston 1, bushings 5 for the electrical leads 6 of the flat cathode 7 are provided.
  • the cathode is designed, for example, as a hot cathode, of which only one glow wire is shown.
  • the piston 1 can for example consist of a nickel-iron alloy.
  • the space enclosed by the piston 1 is closed off by a plate-shaped control structure 8, the edge region of which rests on the flange 3 of the piston 1.
  • the control structure has the task of shaping the electron current generated by the cathode into individual electron beams and modulating it in accordance with the image content of the individual associated pixel.
  • Such control structures are known per se and are therefore not explained in more detail here.
  • the edge 10 of the tub-shaped fluorescent screen 9 lies on the control structure 8 and thus on the flange 3 of the piston 1.
  • the connection between the flange 3, the edge region of the control structure 8 and the edge 10 of the fluorescent screen 9 is shown by a glass solder (not shown) ) made so that a completely closed space is created. This space is pumped empty before the image display device is started up.
  • the inner surface 11 of the fluorescent screen 9 is completely flat and a fluorescent layer, not shown, is applied to it.
  • the outer surface of the fluorescent screen is slightly curved. As a result, the fluorescent screen 9 has a greater thickness in the middle than at the edge.
  • the radius of the curvature of the outer surface 12 is approximately 3500 mm for a fluorescent screen with a diagonal of 36 cm.
  • the fluorescent screen 9 is preferably made of pressed glass and is therefore inexpensive and easy to manufacture. It is essential that the glass of the fluorescent screen 9 and the metal of the bulb 1 have the same coefficient of thermal expansion.
  • the implosion protection is applied to the side walls 13 of the fluorescent screen 9.
  • the implosion protection consists of a metallic band 14, which is under tension and thus exerts a force on the side walls 13 of the fluorescent screen 9.
  • the flat image display device described is suitable for monochrome as well as color display of images or characters.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
EP85115766A 1984-12-14 1985-12-11 Tube image plat Withdrawn EP0184831A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445628 1984-12-14
DE19843445628 DE3445628A1 (de) 1984-12-14 1984-12-14 Flache bildwiedergabevorrichtung

Publications (2)

Publication Number Publication Date
EP0184831A2 true EP0184831A2 (fr) 1986-06-18
EP0184831A3 EP0184831A3 (fr) 1988-04-27

Family

ID=6252771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115766A Withdrawn EP0184831A3 (fr) 1984-12-14 1985-12-11 Tube image plat

Country Status (5)

Country Link
US (1) US4720657A (fr)
EP (1) EP0184831A3 (fr)
JP (1) JPS61179042A (fr)
CA (1) CA1231368A (fr)
DE (1) DE3445628A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911348A1 (de) * 1989-04-07 1990-10-11 Nokia Unterhaltungselektronik Flache anzeigeeinrichtung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2194383B (en) * 1986-08-22 1990-05-30 Philips Electronic Associated Cathode ray tube
DE3640833A1 (de) * 1986-11-28 1988-06-09 Standard Elektrik Lorenz Ag Flache bildwiedergabevorrichtung
JPH0722000B2 (ja) * 1988-09-20 1995-03-08 三菱電機株式会社 受像管装置
DE3911343A1 (de) * 1989-04-07 1990-10-11 Nokia Unterhaltungselektronik Flache anzeigeeinrichtung
US5256937A (en) * 1989-04-07 1993-10-26 Nokia (Deutschland) Gmbh Flat panel fluorescent screen display tube
JP2507110B2 (ja) * 1990-01-19 1996-06-12 松下電器産業株式会社 画像表示装置用ガラス容器の製造方法
US5053880A (en) * 1990-06-05 1991-10-01 Thomson Consumer Electronics, Inc. Implosion-resistant cathode-ray tube with mounting lug having a curved shoulder projection
DE4201032C2 (de) * 1991-01-16 1999-01-07 Mitsubishi Electric Corp Kathodenstrahlröhre
KR950001363B1 (ko) * 1991-01-16 1995-02-17 미쯔비시덴끼 가부시끼가이샤 보강틀을 갖는 음극선관장치
US5188553A (en) * 1991-04-05 1993-02-23 Zenith Electronics Corporation Flat front panel CRT bulb pre-stressed prior to final evacuation and method of making same
JPH05163036A (ja) * 1991-12-10 1993-06-29 Nippon Sheet Glass Co Ltd ガラス製耐圧容器
DE69918874T2 (de) 1998-01-30 2005-07-21 Hitachi, Ltd. Kathodenstrahlröhre
KR100313899B1 (ko) * 1999-08-13 2001-11-15 구자홍 음극선관용 보강밴드

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202498A (en) * 1961-05-17 1965-08-24 Owens Illinois Glass Co Glass forming plunger
GB974093A (en) * 1962-05-15 1964-11-04 Nat Res Dev Cathode ray tube
US3735677A (en) * 1972-09-08 1973-05-29 Gen Electric Annular exposure source
US3882355A (en) * 1972-12-29 1975-05-06 Ibm Flat screen display device using controlled cold cathodes
US4160510A (en) * 1978-01-30 1979-07-10 Rca Corporation CRT with tension band adapted for pusher-type tensioning and method for producing same
GB1598888A (en) * 1978-05-30 1981-09-23 Philips Electronic Associated Electron display tubes
JPS588546B2 (ja) * 1978-11-25 1983-02-16 松下電器産業株式会社 表示装置
DE2855108A1 (de) * 1978-12-20 1980-06-26 Siemens Ag Abstandshalterung in einer gasentladungsanzeigevorrichtung
US4377766A (en) * 1980-09-05 1983-03-22 International Standard Electric Corporation Frame for unit module of a vacuum-fluorescent display

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911348A1 (de) * 1989-04-07 1990-10-11 Nokia Unterhaltungselektronik Flache anzeigeeinrichtung

Also Published As

Publication number Publication date
US4720657A (en) 1988-01-19
CA1231368A (fr) 1988-01-12
EP0184831A3 (fr) 1988-04-27
DE3445628A1 (de) 1986-06-19
JPS61179042A (ja) 1986-08-11

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Effective date: 19880806

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Owner name: NOKIA GRAETZ GESELLSCHAFT MIT BESCHRAENKTER HAFTUN

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Withdrawal date: 19890415

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Effective date: 19890415

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Inventor name: TISCHER, KURT MANFRED