GB1315125A - Cathode ray tubes - Google Patents

Cathode ray tubes

Info

Publication number
GB1315125A
GB1315125A GB1315125DA GB1315125A GB 1315125 A GB1315125 A GB 1315125A GB 1315125D A GB1315125D A GB 1315125DA GB 1315125 A GB1315125 A GB 1315125A
Authority
GB
United Kingdom
Prior art keywords
screen
graticule
cathode ray
luminescent
electro
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
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Publication of GB1315125A publication Critical patent/GB1315125A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • 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
    • H01J29/34—Luminescent screens provided with permanent marks or references

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

1315125 Cathode ray tubes EMI Ltd 30 July 1970 [15 Aug 1969] 40932/69 Heading H1D [Also in Division C4] A cathode ray tube for oscilloscope use comprises a phosphor screen scanned by the beam and includes means for exciting parts of the screen by an electric field to provide an illuminated graticule. The phosphor may comprise material which is both electro-luminescent and cathodo-luminescent, or the screen may comprise two separate phosphors either mixed together or in layers. The screen may be provided with an aluminium backing layer which serves as one electrode for the electric field; the other electrode may comprise either a semi-transparent or an opaque conductive graticule formed on the opposite side of the screen, e.g. on the inner surface of the faceplate, or may comprise a continuous semi-transparent conductive film on which graticule markings are formed of opaque material or of electro-luminescent material. A further form of graticule comprise two parallel tracks of conductive material with provision for applying a suitable voltage between the tracks to produce electro-luminescence.
GB1315125D 1969-08-15 1969-08-15 Cathode ray tubes Expired GB1315125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4093269 1969-08-15

Publications (1)

Publication Number Publication Date
GB1315125A true GB1315125A (en) 1973-04-26

Family

ID=10417319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1315125D Expired GB1315125A (en) 1969-08-15 1969-08-15 Cathode ray tubes

Country Status (1)

Country Link
GB (1) GB1315125A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484100A (en) * 1981-02-12 1984-11-20 Tokyo Shibaura Denki Kabushiki Kaisha Cathode-ray tube for projector having heat conduction and radiating means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484100A (en) * 1981-02-12 1984-11-20 Tokyo Shibaura Denki Kabushiki Kaisha Cathode-ray tube for projector having heat conduction and radiating means

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed