EP0467304B1 - Appareil d'observation d'images - Google Patents

Appareil d'observation d'images Download PDF

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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
German (de)
English (en)
Other versions
EP0467304A2 (fr
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/fr
Publication of EP0467304A3 publication Critical patent/EP0467304A3/en
Application granted granted Critical
Publication of EP0467304B1 publication Critical patent/EP0467304B1/fr
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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

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

Claims (17)

  1. Dispositif pour la visualisation d'images complexes, par exemple du type télévision, en particulier pour des écrans de profondeur réduite, du type comprenant une enveloppe de maintien du vide, une fenêtre d'affichage dont la paroi intérieure est un écran à cathodo-luminescence, dans lequel des luminophores sont excités par une pluralité de faisceaux d'électrons commandés en fonction de l'image à afficher, ainsi qu'une pluralité d'éléments de support à espacement étroit (11), caractérisé en ce que les points de contact entre lesdits éléments de support et ladite fenêtre d'affichage (3) sont rendus pratiquement invisibles par des éléments réfléchissants (7) disposés dans des logements adéquats (4) situés à l'intérieur de ladite fenêtre d'affichage (3), lesdits éléments réfléchissants (7) présentant une surface qui est inclinée et en retrait par rapport au reste de la surface de la fenêtre d'affichage (3) et qui réfléchit la lumière émise par les luminophores (5, 6) situés à proximité dudit logement (4), et étant inclinés et en retrait par rapport au reste de la partie interne de la fenêtre d'affichage.
  2. Dispositif de visualisation d'images complexes selon la revendication 1, caractérisé en ce que les deux dièdres de la surface inclinée desdits éléments réfléchissants (7) et desdits luminophores (5 et 6) permettent de délimiter deux ouvertures optiques (10) constituant de façon idéale la continuation de l'agencement régulier des luminophores.
  3. Dispositif de visualisation d'images complexes selon la revendication précédente, caractérisé en ce que ladite inclinaison des surfaces réfléchissantes desdits éléments réfléchissants (7) et desdits luminophores (5 et 6) est constituée d'angles compris entre 50° et 80°.
  4. Dispositif de visualisation d'images complexes selon la revendication 2, caractérisé en ce que le faisceau lumineux émis par les luminophores (5 et 6) agencés à proximité des éléments (4) sort de la fenêtre d'affichage (3) avec la même distribution angulaire que les luminophores restants (G, V, B).
  5. Dispositif de visualisation d'images complexes selon la revendication 1, caractérisé en ce que lesdits éléments de support (11) sont constitués par deux sections de terminaison agencées entre deux des chambres adjacentes en lesquelles est divisée ladite enveloppe.
  6. Dispositif de visualisation d'images complexes selon la revendication 1, caractérisé en ce que ladite enveloppe est réalisée par soudage sous vide dudit écran, d'une pluralité de dômes ainsi que des éléments de support (11) de l'enveloppe.
  7. Dispositif de visualisation d'images complexes selon la revendication 6, caractérisé en ce que ladite enveloppe présente une forme multi-dômes.
  8. Dispositif de visualisation d'images complexes selon la revendication 1, caractérisé en ce que lesdits éléments réfléchissants (7) sont constitués par des bandes cunéiformes en un métal mou.
  9. Dispositif de visualisation d'images complexes selon la revendication précédente, caractérisé en ce que lesdits éléments réfléchissants (7) présentent, à leur section postérieure, une forme adaptée pour réaliser le centrage des éléments de support (11) et pour distribuer de façon uniforme la pression exercée par les éléments de support (11).
  10. Dispositif de visualisation d'images complexes selon les revendications 1, 2 et 4, caractérisé en ce que lesdites surfaces en retrait de la fenêtre d'affichage (3) sont obtenues par des opérations de meulage.
  11. Dispositif de visualisation d'images complexes selon les revendications 1, 2 et 4, caractérisé en ce que lesdits logements (4) desdits éléments de support (11) sont constitués par des organes qui sont ajoutés et qui sont fixés à une plaque plane.
  12. Dispositif de visualisation d'images complexes selon la revendication 1, caractérisé en ce que ladite enveloppe est divisée en plusieurs chambres.
  13. Dispositif de visualisation d'images complexes selon la revendication 12, caractérisé en ce que chacune des chambres en lesquelles est divisée l'enveloppe correspond à un tube-image.
  14. Dispositif de visualisation d'images complexes selon la revendication 12, caractérisé en ce que les écrans de télévision utilisés sont du type à canon d'électrons unique dont le faisceau est focalisé sur des luminophores des trois couleurs primaires pendant des périodes successives.
  15. Dispositif de visualisation d'images complexes selon la revendication 12, caractérisé en ce que les écrans de télévision utilisés sont du type à indexation de faisceau.
  16. Dispositif de visualisation d'images complexes selon la revendication 12, caractérisé en ce que chacune des chambres en lesquelles est divisée l'enveloppe contient une ou plusieurs structures en matrice composée d'électrodes croisées focalisant une pluralité de faisceaux d'électrons, contrôlant l'intensité desdits faisceaux et les déviant sur des petites parties de l'écran.
  17. Dispositif de visualisation d'images complexes selon la revendication 13, caractérisé en ce que lesdits faisceaux d'électrons sont obtenus à partir d'un source plane d'électrons ou à partir d'une pluralité de sources linéaires ou ponctuelles.
EP91111865A 1990-07-17 1991-07-16 Appareil d'observation d'images Expired - Lifetime EP0467304B1 (fr)

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 (fr) 1992-01-22
EP0467304A3 EP0467304A3 (en) 1993-03-17
EP0467304B1 true EP0467304B1 (fr) 1997-01-29

Family

ID=11264865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111865A Expired - Lifetime EP0467304B1 (fr) 1990-07-17 1991-07-16 Appareil d'observation d'images

Country Status (4)

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

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 (fr) * 1989-06-19 2004-01-02 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage à panneau plat

Also Published As

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

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