EP0467304B1 - Bildbetrachtungsgerät - Google Patents

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Publication number
EP0467304B1
EP0467304B1 EP91111865A EP91111865A EP0467304B1 EP 0467304 B1 EP0467304 B1 EP 0467304B1 EP 91111865 A EP91111865 A EP 91111865A EP 91111865 A EP91111865 A EP 91111865A EP 0467304 B1 EP0467304 B1 EP 0467304B1
Authority
EP
European Patent Office
Prior art keywords
fact
viewing device
complex images
elements
envelope
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 - Lifetime
Application number
EP91111865A
Other languages
English (en)
French (fr)
Other versions
EP0467304A2 (de
EP0467304A3 (en
Inventor
Paolo Maltese
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.)
Sisvel SpA
Original Assignee
Sisvel SpA
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Filing date
Publication date
Application filed by Sisvel SpA filed Critical Sisvel SpA
Publication of EP0467304A2 publication Critical patent/EP0467304A2/de
Publication of EP0467304A3 publication Critical patent/EP0467304A3/en
Application granted granted Critical
Publication of EP0467304B1 publication Critical patent/EP0467304B1/de
Anticipated expiration legal-status Critical
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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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/128—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digitally controlled display tubes

Definitions

  • the present invention relates to a viewing device of complex images, for example of the television type, particularly for large screens of a reduced depth, of the type comprising an envelope, whose internal wall is a cathodoluminescent screen, in which phospors are excited by a multitude of electron beams, controlled in accordance of the image to be displayed, a display window, a multitude of close-spaced sustaining elements.
  • 1 and 2 indicate the lateral walls of two of the multitude of chambers, in this case represented by picture tubes, that when assembled make up a viewing screen.
  • a display window of the device is indicated.
  • 4 indicates a housing, making up part of said display window 3, of a sustaining element 11 constituted, in this case, by two terminal sections of two adjacent picture tubes welded together at the walls 1 and 2.
  • Such housing 4 may be obtained by grinding treatment, or can be constituted by elements located on a flat plate, otherwise it can be constituted by elements located on and applied to an extremity of the sustaining elements.
  • the reference number 7 indicates a reflecting element constituted by soft metal wedge strips presenting a mirrored surface, which is a functioning part of the housing 4.
  • Such mirrored surfaces of said reflective element 7 and the phosphors 5 and 6, placed in proximity of said housing 4, are inclined and set back with respect to the remainder of the internal wall of the display window 3.
  • Two optical opening are represented with the number 10 that, are obtained by two dihedrons constituted by the inclined surfaces of said reflective element 7 and of said phosphors 5 and 6.
  • Such optical openings constitute the ideal continuation of the regular distribution of the phosphors on the picture tubes.
  • the surface of the display window 3, in correspondance of the optical openings 10, is made up of optical material diffused with the aim of making the angular arrangement luminous, given out from said optical opening 10, similar to that given out from the remaining phosphor of the screen.
  • the window display 3 a plurality of domes, in this case picture tubes comprising one or more means for the generation of electrical or magnetic fields for focusing and deflecting, and the sustaining elements 11, a principle envelope is obtained.
  • R, G, B the phophors corresponding to the three primary colours of colour televisions (red, green and blue) are indicated.
  • the picture tubes utilised in this example are of the "beam-index" type and the phosphors index are indicated with the numbers 8 and 9.
  • each of the said picture tubes reproduces a portion of the image to be viewed.
  • This type of reproduction is possible by means of a known techniques that consist in the division of the sequential video signal in many parts to be addressed, in a parallel manner, to every picture tube of the system.
  • the picture tubes utilised in this example have the characteristics of using a single beam of electrons and do not present a filtering shadow mask of the beams of electrons. In this case there are no problems of beam convergency, the so called doming effect is not a problem and there are no problems of power dispersion.
  • the beam of electrons scan, in an orderly fashion, the vertical strips of red, green and blue phosphors and the selection of colour is obtained furnishing the beam the correct current at the right time.
  • the piloting circuit must have precise information regarding the position of the beam of electrons in respect to the strips of phosphors.
  • the phosphors index 8 and 9 emitting ultra violet rays placed on the alluminium sheet blanketing the phosphors of the screen towards the electronic gun.
  • the ultraviolet light, emitted from said strips called index is collected by a photodetector and converted into an electrical signal for the pilot circuit.
  • Another technique is when the coloured phosphor strips are horizontally arranged and the three phosphors become excited subsequently every three line scannings.
  • the device functions in the following way:
  • the beam of electrons that scans the screen is piloted by the piloting circuit in such a way so as to hit all of the phosphors in function of the image to be reproduced.
  • the phosphor to be hit is the more extreme with relation to the screen, in this case the phosphor 5 or 6, we have a case in which the beam of light emitted from said phosphor 5 or 6 will exit from the opening 10 after having in part hit the reflective element 7.
  • the display window 3 is only one plate on which picture tubes are constructed thus creating a multidome type structure.
  • the image viewing device completely achieves the set aim in as much the adjacent points result in being really cancelled by the optical effect created by the mirrored element 7.
  • the mirrored element 7 in its posterior section is formed in such a way that the sustaining elements 11 are centered and that the pressure exercised by them be equally placed.

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Liquid Crystal (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Claims (17)

  1. Betrachtungsgerät für komplexe Bilder, z.B. von der Art des Fernsehbildes, insbesondere für große Bildschirme einer verringerten Tiefe, mit einer Vakuum-Hülle, einem Anzeigefenster, dessen innere Wand ein Kathodenleuchtschirm ist, in welchem Phosphor durch mehrere Elektronenstrahlen erregt wird, welche entsprechend dem anzuzeigenden Bild gesteuert werden, und mehreren eng beabstandeten Tragelementen (11),
    dadurch gekennzeichnet, daß die Kontaktpunkte der Tragelemente mit dem Anzeigefenster (3) durch reflektierende Elemente (7), die in geeigneten Gehäusen (4) angeordnet sind, welche innerhalb des Anzeigefensters (3) vorgesehen sind, praktisch unsichtbar gemacht werden, wobei die reflektierenden Elemente (7) bezogen auf die übrige Oberfläche des Anzeigefensters (3) eine geneigte und zurückgezogene Oberfläche aufweisen und das von dem Phosphor (5, 6) in der Nachbarschaft des Gehäuses (4) emittierte Licht reflektieren und, bezogen auf den verbleibenden inneren Teil des Anzeigefensters, geneigt und zurückgezogen sind.
  2. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß zwei Zweiflache der geneigten Oberfläche des reflektierenden Elements (7) und des Phosphors (5 und 6) so ausgebildet sind, daß sie zwei optische Öffnungen (10) begrenzen, die ideal die regelmäßige Anordnung des Phosphors fortsetzen.
  3. Betrachtungsgerät für komplexe Bilder nach Anspruch 2,
    dadurch gekennzeichnet, daß die Neigung der gespiegelten Oberflächen der reflektierenden Elemente (7) und des Phosphors (5 und 6) aus Winkeln von 50° bis 80° besteht.
  4. Betrachtungsgerät für komplexe Bilder nach Anspruch 2,
    dadurch gekennzeichnet, daß die von dem den Elementen (4) benachbart angeordneten Phosphor (5 und 6) emittierten Lichtstrahlen das Anzeigefenster (3) mit der gleichen Winkelverteilung wie das verbleibende Phosphor (R, G, B) verlassen.
  5. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die Tragelemente (11) durch zwei Endsektionen gebildet sind, die zwischen zwei benachbarten Kammern angeordnet sind, in welche die Hülle aufgeteilt ist.
  6. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die Hülle verwirklicht wird durch Zusammenschweißen des Bildschirms, mehrerer Kuppeln und der Tragelemente (11) der Hülle im Vakuum.
  7. Betrachtungsgerät für komplexe Bilder nach Anspruch 6,
    dadurch gekennzeichnet, daß die Hülle eine Mehrfachkuppelform aufweist.
  8. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die reflektierenden Elemente (7) durch keilförmige Streifen eines weichen Metalls gebildet sind.
  9. Betrachtungsgerät für komplexe Bilder nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß die reflektierenden Elemente (7) in ihrer hinteren Sektion so ausgebildet sind, daß sie die Tragelemente (11) zentrieren und den durch die Tragelemente (11) ausgeübten Druck gleichmäßig verteilen.
  10. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die zurückgezogenen Oberflächen des Anzeigefensters (3) durch Schleifvorgänge erhalten werden.
  11. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die Gehäuse (4) derTragelemente (11) durch Elemente gebildet sind, die zu einer flachen Platte hinzugefügt und daran befestigt werden.
  12. Betrachtungsgerät für komplexe Bilder nach Anspruch 1,
    dadurch gekennzeichnet, daß die Hülle in mehrere Kammern aufgeteilt ist.
  13. Betrachtungsgerät für komplexe Bilder nach Anspruch 12,
    dadurch gekennzeichnet, daß jede Kammer, in welche die Hülle aufgeteilt ist, einer Bildröhre entspricht.
  14. Betrachtungsgerät für komplexe Bilder nach Anspruch 12,
    dadurch gekennzeichnet, daß die verwendeten Bildschirme vom Einzelelektronenstrahlkanonentyp sind, dessen Strahl auf dem Phosphor der drei Primärfarben in aufeinanderfolgenden Zeitabschnitten fokussiert wird.
  15. Betrachtungsgerät für komplexe Bilder nach Anspruch 12,
    dadurch gekennzeichnet, daß die verwendeten Bildschirme vom "Strahl-Index"-Typ sind.
  16. Betrachtungsgerät für komplexe Bilder nach Anspruch 12,
    dadurch gekennzeichnet, daß jede Kammer, in welche die Hülle aufgeteilt ist, eine oder mehrere Matrixstrukturen aus gekreuzten Elektroden aufweist, die mehrere Elektronenstrahlen fokussieren, deren Intensität steuern und sie auf kleinen Teilen des Bildschirms ablenken.
  17. Betrachtungsgerät für komplexe Bilder nach Anspruch 16,
    dadurch gekennzeichnet, daß die Elektronenstrahlen ausgehend von einer flachen Elektronenquelle oder von mehreren linearen oder punktförmigen Quellen erhalten werden.
EP91111865A 1990-07-17 1991-07-16 Bildbetrachtungsgerät Expired - Lifetime EP0467304B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4815290 1990-07-17
IT48152A IT1241491B (it) 1990-07-17 1990-07-17 Dispositivo visualizzatore di immagini.

Publications (3)

Publication Number Publication Date
EP0467304A2 EP0467304A2 (de) 1992-01-22
EP0467304A3 EP0467304A3 (en) 1993-03-17
EP0467304B1 true EP0467304B1 (de) 1997-01-29

Family

ID=11264865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111865A Expired - Lifetime EP0467304B1 (de) 1990-07-17 1991-07-16 Bildbetrachtungsgerät

Country Status (4)

Country Link
EP (1) EP0467304B1 (de)
DE (1) DE69124433T2 (de)
ES (1) ES2099719T3 (de)
IT (1) IT1241491B (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8302966A (nl) * 1983-08-25 1985-03-18 Philips Nv Beeldweergeefpaneel.
EP0405262B2 (de) * 1989-06-19 2004-01-02 Matsushita Electric Industrial Co., Ltd. Anzeigevorrichtung mit flachem Bildschirm

Also Published As

Publication number Publication date
EP0467304A2 (de) 1992-01-22
DE69124433D1 (de) 1997-03-13
IT9048152A1 (it) 1992-01-17
IT1241491B (it) 1994-01-17
EP0467304A3 (en) 1993-03-17
DE69124433T2 (de) 1997-07-10
ES2099719T3 (es) 1997-06-01
IT9048152A0 (it) 1990-07-17

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