EP0184832A2 - Tube image plat - Google Patents

Tube image plat Download PDF

Info

Publication number
EP0184832A2
EP0184832A2 EP85115767A EP85115767A EP0184832A2 EP 0184832 A2 EP0184832 A2 EP 0184832A2 EP 85115767 A EP85115767 A EP 85115767A EP 85115767 A EP85115767 A EP 85115767A EP 0184832 A2 EP0184832 A2 EP 0184832A2
Authority
EP
European Patent Office
Prior art keywords
beads
display device
image display
tub
flange
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Withdrawn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
EP85115767A
Other languages
German (de)
English (en)
Other versions
EP0184832A3 (fr
Inventor
Wilfred Prof. Dr. Bernhard
Michael Dr. Schlipf
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 EP0184832A2 publication Critical patent/EP0184832A2/fr
Publication of EP0184832A3 publication Critical patent/EP0184832A3/fr
Withdrawn legal-status Critical Current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
    • H01J29/861—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 screen display device is known from the publication "The flat television screen” in Funkschau 1980, Issue 10, pages 62 to 66, Fig. 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 region of the front plate rests. The bottom of the metal encapsulation is curved outwards and the electrical leads to the surface cathode are guided through it.
  • the invention has for its object to improve an image display device of the type mentioned in such a way that its metallic tub is small, light and yet stable.
  • the image display device shown in FIG. 1 on a reduced scale has a metallic flat trough 1, the side walls 2 of which end in a circumferential flange 3.
  • bushings 5 are provided for the electrical supply lines 6 of the cathode 7, which has a quasi-planar effect.
  • the cathode is designed, for example, as a hot cathode, of which only one glow wire is shown.
  • the trough 1 can consist, for example, of a nickel-iron alloy, which preferably has an expansion which is adapted to the glass parts to be used in the subsequent vacuum vessel.
  • the space enclosed by the tub 1 is closed off by a plate-shaped control structure 8, the edge region of which rests on the flange 3 of the tub 1.
  • the control structure 8 has the task of shaping the electron current generated by the cathode 7 into individual electron beams and corresponding to the image content of the individual to modulate the 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 tub 1.
  • the connection between the flange 3, the edge region of the control structure 8 and the edge of the fluorescent screen is made by a glass solder (not shown) so that a completely closed room is created. This space is pumped empty of air before starting up the image display device.
  • the inner surface 11 of the luminescent screen is flat and the luminescent layer 15 is applied to it.
  • the outer surface 12 of the luminescent screen is slightly curved.
  • the luminescent screen 9 is preferably made of pressed glass. It is essential that the glass of the fluorescent screen 9 and the metal of the tub 1 have the same thermal expansion coefficient.
  • an implosion protection consisting of a metal band 14 is applied.
  • a flat glass plate with an internally applied fluorescent layer can also rest on the control structure via a spacer element.
  • Corrugations 16a and 16b are present in the bottom 4 of the metallic trough 1 , which is slightly curved outwards.
  • the outer beads 16a closer to the side walls 2 of the tub 1 are pressed into the tub and the other beads 16b are pressed outward.
  • These beads 16 give the tub 1 very good rigidity with the least possible use of material.
  • Holes 18 are present in the bottom surfaces of the beads 16a, in which the bushings 5 for the electrical feed lines 6 are arranged.
  • the bottom surfaces 17 of the beads 16a run in a plane which is shown in dashed lines and which runs parallel to the plane defined by the flange 3. This ensures that all the filaments of the cathode 7 lie in one plane and generate a uniform electron current.
  • the side walls 2 of the tub 1 enclose a small angle with a line that is perpendicular to the plane defined by the flange 3. This means that the tub has a larger width in the area of its flange 3 than in the area of its bottom 4. Stiffening ribs 19 are present in the side walls 2. These stiffening ribs 19 are perpendicular to the plane formed by the flange 3. That is, they are pushed further out of the side walls 2 in the vicinity of the bottom 4 of the trough 1 than in the vicinity of the flange 3.
  • the side walls 2 are curved slightly outwards, as a result of which the flange 3 is narrower in the middle area than in the corner areas.
  • all the beads 16a and 16b run parallel to the narrower side of the tub 1.
  • the ends of the beads 16a and 16b are rounded in order to obtain a continuous transition to the bottom 4 of the tub 1.
  • the stiffening ribs 19 are clearly recognizable as bulges.
  • Fig. 3 the section along the line III-III in Fig. 2 is shown. It can be seen that the bottom surface 1 7 of the bead 1 6a runs parallel to the plane determined by the flange 3. The beads 16b are similarly curved outward as the bottom 4 of the tray 1.
  • six holes 16a 1 8 to receive the feedthroughs for the electrical leads to the cathode are present in the bead. A different number of holes and thus bushings can be selected according to the respective requirements.
  • FIG. 4 shows a section along the line IV-IV in FIG. 2.
  • the plane defined by the bottom surfaces 17 of the beads 16a is shown in dashed lines and it can be seen that it runs parallel to the plane defined by the flange 3.
  • the depth of the beads 16a is only shown by way of example in FIG. 4.
  • the depth of the stiffening ribs 1 9 results from the inclination of the side walls 2 to the vertical.
  • the central beads can not only be pressed outwards but also inwards.
  • FIG. 5 Such an exemplary embodiment is shown in FIG. 5 in a section of a partially and only schematically illustrated trough.
  • the beads 16b run parallel to the longer side of the trough. This makes it possible to use the beads 16b simultaneously as a field former for the electron current to be generated by the cathode 7.
  • An angle piece 20 is present between the side wall 2 of the tub and the first glow wire of the cathode 7, which are also only shown schematically. This angle piece 20 also serves as a field former and at the same time, with its part 22, which is connected to the base 4 of the tub by means of welding spots 21, contributes to stiffening the tub.
  • Getters (not shown) can be attached in the stiffening ribs 19.
  • 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)
  • Illuminated Signs And Luminous Advertising (AREA)
EP85115767A 1984-12-14 1985-12-11 Tube image plat Withdrawn EP0184832A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843445629 DE3445629A1 (de) 1984-12-14 1984-12-14 Flache bildwiedergabevorrichtung
DE3445629 1984-12-14

Publications (2)

Publication Number Publication Date
EP0184832A2 true EP0184832A2 (fr) 1986-06-18
EP0184832A3 EP0184832A3 (fr) 1988-04-20

Family

ID=6252772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115767A Withdrawn EP0184832A3 (fr) 1984-12-14 1985-12-11 Tube image plat

Country Status (4)

Country Link
EP (1) EP0184832A3 (fr)
JP (1) JPS61179043A (fr)
CA (1) CA1228113A (fr)
DE (1) DE3445629A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0722849Y2 (ja) * 1987-09-30 1995-05-24 双葉電子工業株式会社 蛍光表示装置
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
JP2950043B2 (ja) * 1992-10-02 1999-09-20 三菱電機株式会社 薄形真空容器およびその製造方法
JP3424358B2 (ja) * 1994-12-06 2003-07-07 三菱電機株式会社 平板型画像表示装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE532722A (fr) * 1953-10-23
US2969162A (en) * 1957-04-22 1961-01-24 Kimble Glass Co Molded picture tube
US3297188A (en) * 1964-05-14 1967-01-10 William R Aiken Envelope for cathode ray tubes
US3882355A (en) * 1972-12-29 1975-05-06 Ibm Flat screen display device using controlled cold cathodes
US3917968A (en) * 1974-02-22 1975-11-04 Texas Instruments Inc Area flood gun
DE2831962C3 (de) * 1978-07-20 1981-02-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Kathode für eine Gasentladungsanzeigeröhre
US4387332A (en) * 1980-01-29 1983-06-07 Sanyo Electric Co., Ltd. Apparatus for successively charging rechargeable batteries
JPS6158146A (ja) * 1984-08-30 1986-03-25 Matsushita Electric Ind Co Ltd 平面型真空表示管の容器

Also Published As

Publication number Publication date
DE3445629A1 (de) 1986-06-19
CA1228113A (fr) 1987-10-13
JPS61179043A (ja) 1986-08-11
EP0184832A3 (fr) 1988-04-20

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Effective date: 19881021

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Inventor name: SCHLIPF, MICHAEL, DR.

Inventor name: BERNHARD, WILFRED, PROF. DR.

Inventor name: TISCHER, KURT MANFRED