EP0067507A3 - Cathode ray tube screens - Google Patents

Cathode ray tube screens Download PDF

Info

Publication number
EP0067507A3
EP0067507A3 EP82302090A EP82302090A EP0067507A3 EP 0067507 A3 EP0067507 A3 EP 0067507A3 EP 82302090 A EP82302090 A EP 82302090A EP 82302090 A EP82302090 A EP 82302090A EP 0067507 A3 EP0067507 A3 EP 0067507A3
Authority
EP
European Patent Office
Prior art keywords
ray tube
cathode ray
screen
electron beam
tube screens
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Withdrawn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
EP82302090A
Other languages
German (de)
French (fr)
Other versions
EP0067507A2 (en
Inventor
Brian Cockayne
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 EP0067507A2 publication Critical patent/EP0067507A2/en
Publication of EP0067507A3 publication Critical patent/EP0067507A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01J29/20—Luminescent screens characterised by the luminescent material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Luminescent Compositions (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

A cathode ray tube comprises an envelope (1) having a screen (3) of a single crystalline or polycrystalline material such as yttrium aluminium garnet. Dopants such as Tb³⁻, Eu³⁻, Ce³⁻ or Tm³⁻ are implanted to different depths or in different areas (7, 10) of the screen. Annealing the screen removes lattice damage caused by the implanting. Multicol­ our luminescence is obtained by scanning an electron beam over the differently doped areas (7, 10), or by varying the electron beam energy as it scans.
EP82302090A 1981-05-19 1982-04-23 Cathode ray tube screens Withdrawn EP0067507A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8115379 1981-05-19
GB8115379 1981-05-19

Publications (2)

Publication Number Publication Date
EP0067507A2 EP0067507A2 (en) 1982-12-22
EP0067507A3 true EP0067507A3 (en) 1983-05-04

Family

ID=10521918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302090A Withdrawn EP0067507A3 (en) 1981-05-19 1982-04-23 Cathode ray tube screens

Country Status (2)

Country Link
EP (1) EP0067507A3 (en)
JP (1) JPS57196447A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2509427B2 (en) * 1992-12-04 1996-06-19 浜松ホトニクス株式会社 Image tube
US20130209794A1 (en) * 2010-12-20 2013-08-15 Ocean's King Lighting Science & Technology Co., Ltd. Light emission apparatus and manufacturing method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446268A (en) * 1973-10-29 1976-08-18 Rca Corp Method of making a semiconductor device
GB1484399A (en) * 1976-05-04 1977-09-01 Standard Telephones Cables Ltd Method of annealing a body of iron-implanted semiconducto
GB2000173A (en) * 1977-06-24 1979-01-04 Philips Nv Luminescent screen
US4179638A (en) * 1978-06-29 1979-12-18 Corning Glass Works Cathode ray tube panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446268A (en) * 1973-10-29 1976-08-18 Rca Corp Method of making a semiconductor device
GB1484399A (en) * 1976-05-04 1977-09-01 Standard Telephones Cables Ltd Method of annealing a body of iron-implanted semiconducto
GB2000173A (en) * 1977-06-24 1979-01-04 Philips Nv Luminescent screen
US4179638A (en) * 1978-06-29 1979-12-18 Corning Glass Works Cathode ray tube panel

Also Published As

Publication number Publication date
JPS57196447A (en) 1982-12-02
EP0067507A2 (en) 1982-12-22

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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

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AK Designated contracting states

Designated state(s): DE FR NL

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): DE FR NL

17P Request for examination filed

Effective date: 19830511

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

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18W Application withdrawn

Withdrawal date: 19840531

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ROBBINS, DAVID JOHN

Inventor name: COCKAYNE, BRIAN

Inventor name: GLASPER, JOHN LEWIS