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GB1172129A - High Contrast Cathode Ray Tube Viewing Screen - Google Patents

High Contrast Cathode Ray Tube Viewing Screen

Info

Publication number
GB1172129A
GB1172129A GB3703467A GB3703467A GB1172129A GB 1172129 A GB1172129 A GB 1172129A GB 3703467 A GB3703467 A GB 3703467A GB 3703467 A GB3703467 A GB 3703467A GB 1172129 A GB1172129 A GB 1172129A
Authority
GB
United Kingdom
Prior art keywords
light
layer
oxide
coating
ray tube
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
GB3703467A
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.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of GB1172129A publication Critical patent/GB1172129A/en
Expired 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
    • H01J29/182—Luminescent screens acting upon the lighting-up of the luminescent material other than by the composition of the luminescent material, e.g. by infra red or UV radiation, heating or electric fields
    • 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
    • H01J29/185—Luminescent screens measures against halo-phenomena
    • 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
    • H01J9/2278—Application of light absorbing material, e.g. between the luminescent areas

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

1,172,129. Cathode-ray tubes. HUGHES AIRCRAFT CO. 11 Aug., 1967 [3 Oct., 1966], No. 37034/67. Heading H1D. [Also in Division C1] A cathode-ray tube viewing screen comprises a light transparent glass face-plate 30 with, on the side which will form the inner surface, a coating 32 of glass having light absorbing particles randomly dispersed therein, a layer 35 of luminescent phosphor and a layer 36 of electron-pervious light-reflective material overlying the previous layers. An electrically conductive coating 44 may first be deposited on the glass face-plate 30. The light absorbing particles are preferably of manganese dioxide, but other materials may be used, such as lead oxide, boron oxide, silica, cobalt nitrate, cobalt oxide or iron oxide. Particles of colouring matter may be added to restrict the passage of light of certain wavelengths. To give areas of differing light transmittance, the coating 32 may be in two layers and the top layer incorporates, for example, dichromate ions or other material photo-sensitive to ultra-violet light and the top layer is dried, masked, exposed to ultra-violet light and the unexposed parts removed by washing to leave projecting portions 34 in a desired pattern. The layer 32 and projections 34 are then fused to leave light transmissive areas 38 and non-transmissive areas 40.
GB3703467A 1966-10-03 1967-08-11 High Contrast Cathode Ray Tube Viewing Screen Expired GB1172129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58371466A 1966-10-03 1966-10-03

Publications (1)

Publication Number Publication Date
GB1172129A true GB1172129A (en) 1969-11-26

Family

ID=24334266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3703467A Expired GB1172129A (en) 1966-10-03 1967-08-11 High Contrast Cathode Ray Tube Viewing Screen

Country Status (4)

Country Link
DE (1) DE1589898A1 (en)
GB (1) GB1172129A (en)
NL (1) NL6713455A (en)
SE (1) SE336173B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0684627A1 (en) * 1994-05-24 1995-11-29 Texas Instruments Incorporated Anode comprising an opaque electrically insulating material, for use in a field emission device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310784A (en) * 1979-05-07 1982-01-12 Anthon Erik W Cathode ray tube face plate construction for suppressing the halo and method
DE3245336A1 (en) * 1982-12-08 1984-06-14 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Cathode-ray tube with a fluorescent layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0684627A1 (en) * 1994-05-24 1995-11-29 Texas Instruments Incorporated Anode comprising an opaque electrically insulating material, for use in a field emission device

Also Published As

Publication number Publication date
NL6713455A (en) 1968-04-04
SE336173B (en) 1971-06-28
DE1589898A1 (en) 1970-06-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee