GB1062310A - Improvements in or relating to cathode-luminescent screens and tubes - Google Patents

Improvements in or relating to cathode-luminescent screens and tubes

Info

Publication number
GB1062310A
GB1062310A GB2367565A GB2367565A GB1062310A GB 1062310 A GB1062310 A GB 1062310A GB 2367565 A GB2367565 A GB 2367565A GB 2367565 A GB2367565 A GB 2367565A GB 1062310 A GB1062310 A GB 1062310A
Authority
GB
United Kingdom
Prior art keywords
screen
phosphor
cathode
binder
electron beam
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
Application number
GB2367565A
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.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Publication of GB1062310A publication Critical patent/GB1062310A/en
Expired 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
    • H01J9/221—Applying luminescent coatings in continuous layers
    • H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

A cathode-luminescent phosphor is deposited on a screen by spraying a water suspension of the phosphor and a binder on to the screen. The phosphor may be a manganese-activated zinc silicate, the binder a potassium silicate solution, colloidal silica or an organo-metallic compound, (e.g. of aluminium), and the spray may also include a wetting agent and a viscous agent, e.g. a polyvinyl alcohol. These organic agents may be removed by subsequent baking of the screen, leaving an inorganic suspension medium. The screen in use may have a charge pattern laid upon it by a high velocity electron beam, giving a secondary electron emission ratio greater than one, and the pattern then being rendered visible by a low-velocity electron beam.
GB2367565A 1964-06-03 1965-06-03 Improvements in or relating to cathode-luminescent screens and tubes Expired GB1062310A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3138764 1964-06-03

Publications (1)

Publication Number Publication Date
GB1062310A true GB1062310A (en) 1967-03-22

Family

ID=12329834

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2367565A Expired GB1062310A (en) 1964-06-03 1965-06-03 Improvements in or relating to cathode-luminescent screens and tubes

Country Status (1)

Country Link
GB (1) GB1062310A (en)

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