EP0467304A2 - Appareil d'observation d'images - Google Patents

Appareil d'observation d'images Download PDF

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Publication number
EP0467304A2
EP0467304A2 EP19910111865 EP91111865A EP0467304A2 EP 0467304 A2 EP0467304 A2 EP 0467304A2 EP 19910111865 EP19910111865 EP 19910111865 EP 91111865 A EP91111865 A EP 91111865A EP 0467304 A2 EP0467304 A2 EP 0467304A2
Authority
EP
European Patent Office
Prior art keywords
fact
viewing device
complex images
elements
display window
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.)
Granted
Application number
EP19910111865
Other languages
German (de)
English (en)
Other versions
EP0467304B1 (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
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 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
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J29/02—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 phospers 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.
  • the present invention has as its object 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 phospers 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.
  • the characterising elements of the image viewing device consists in the fact that the contact points of said sustaining elements 11 with said display window 3 are practically made invisible by reflecting elements 7 placed in appropriate housings 4 situated in said display window.
  • 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 diplay 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 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:

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)
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
IT48152A IT1241491B (it) 1990-07-17 1990-07-17 Dispositivo visualizzatore di immagini.
IT4815290 1990-07-17

Publications (3)

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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139314A1 (fr) * 1983-08-25 1985-05-02 Koninklijke Philips Electronics N.V. Panneau d'affichage d'images
EP0405262A1 (fr) * 1989-06-19 1991-01-02 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage à panneau plat

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0139314A1 (fr) * 1983-08-25 1985-05-02 Koninklijke Philips Electronics N.V. Panneau d'affichage d'images
EP0405262A1 (fr) * 1989-06-19 1991-01-02 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage à panneau plat

Also Published As

Publication number Publication date
IT1241491B (it) 1994-01-17
ES2099719T3 (es) 1997-06-01
IT9048152A1 (it) 1992-01-17
DE69124433T2 (de) 1997-07-10
EP0467304B1 (fr) 1997-01-29
EP0467304A3 (en) 1993-03-17
DE69124433D1 (de) 1997-03-13
IT9048152A0 (it) 1990-07-17

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