EP0066948A3 - Cathode ray tubes - Google Patents

Cathode ray tubes Download PDF

Info

Publication number
EP0066948A3
EP0066948A3 EP82302091A EP82302091A EP0066948A3 EP 0066948 A3 EP0066948 A3 EP 0066948A3 EP 82302091 A EP82302091 A EP 82302091A EP 82302091 A EP82302091 A EP 82302091A EP 0066948 A3 EP0066948 A3 EP 0066948A3
Authority
EP
European Patent Office
Prior art keywords
layer
resist
islets
phosphor
fibres
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Withdrawn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
EP82302091A
Other languages
German (de)
French (fr)
Other versions
EP0066948A2 (en
Inventor
John Lewis Glasper
David John Robbins
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of EP0066948A2 publication Critical patent/EP0066948A2/en
Publication of EP0066948A3 publication Critical patent/EP0066948A3/en
Withdrawn legal-status Critical Current

Links

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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/327—Black matrix materials
    • 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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/322—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television with adjacent dots
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

A cathode ray tube (1) (C.R.T.) comprises an en­ velope (2) having a fibre optic face plate (4) formed of light transmitting fibres (6) in a light absorbing matrix (7). Islets (8) of phosphor are arranged in register with the fibres (6). A thin electrically conducting layer (9) covers the islets and inner face of the face plate. The islets (8) are formed by covering the face plate (4) with a phosphor layer (5) then a layer of photo resist (10). The photo resist (10) is exposed to light transmitted along the fibres (6) thereby providing a mask for remov­ ing phosphor not in register with a fibre (6). The photo resist may be a single layer of negative resist, or a layer of negative resist follewed by a barrier layer and a layer of positive resist.
EP82302091A 1981-05-19 1982-04-23 Cathode ray tubes Withdrawn EP0066948A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8115377 1981-05-19
GB8115377 1981-05-19

Publications (2)

Publication Number Publication Date
EP0066948A2 EP0066948A2 (en) 1982-12-15
EP0066948A3 true EP0066948A3 (en) 1983-01-12

Family

ID=10521917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302091A Withdrawn EP0066948A3 (en) 1981-05-19 1982-04-23 Cathode ray tubes

Country Status (2)

Country Link
EP (1) EP0066948A3 (en)
JP (1) JPS57196448A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996402A (en) * 1957-04-02 1961-08-15 Davohn Corp Method for making zinc sulfide luminescent screens
US3237039A (en) * 1961-04-17 1966-02-22 Litton Prec Products Inc Cathode ray tube using fiber optics faceplate
US3303374A (en) * 1961-01-17 1967-02-07 Litton Prec Products Inc Cathode ray tube including face plate comprising tapered fiber optical elements mounted in an opaque mosaic
GB1267783A (en) * 1969-07-28 1972-03-22 Matsushita Electric Ind Co Ltd Fibre-optics faceplates for cathode ray tubes and the like
US3887724A (en) * 1972-11-22 1975-06-03 Us Army Method of making high contrast fiber optic phosphor screen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996402A (en) * 1957-04-02 1961-08-15 Davohn Corp Method for making zinc sulfide luminescent screens
US3303374A (en) * 1961-01-17 1967-02-07 Litton Prec Products Inc Cathode ray tube including face plate comprising tapered fiber optical elements mounted in an opaque mosaic
US3237039A (en) * 1961-04-17 1966-02-22 Litton Prec Products Inc Cathode ray tube using fiber optics faceplate
GB1267783A (en) * 1969-07-28 1972-03-22 Matsushita Electric Ind Co Ltd Fibre-optics faceplates for cathode ray tubes and the like
US3887724A (en) * 1972-11-22 1975-06-03 Us Army Method of making high contrast fiber optic phosphor screen

Also Published As

Publication number Publication date
EP0066948A2 (en) 1982-12-15
JPS57196448A (en) 1982-12-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR NL

AK Designated contracting states

Designated state(s): DE FR NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19831223

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GLASPER, JOHN LEWIS

Inventor name: ROBBINS, DAVID JOHN