GB1449603A - Cathode ray tubes and display devices - Google Patents

Cathode ray tubes and display devices

Info

Publication number
GB1449603A
GB1449603A GB4246372A GB4246372A GB1449603A GB 1449603 A GB1449603 A GB 1449603A GB 4246372 A GB4246372 A GB 4246372A GB 4246372 A GB4246372 A GB 4246372A GB 1449603 A GB1449603 A GB 1449603A
Authority
GB
United Kingdom
Prior art keywords
guns
layer
ray tubes
tube
cathode
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
GB4246372A
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
Priority to GB4246372A priority Critical patent/GB1449603A/en
Publication of GB1449603A publication Critical patent/GB1449603A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/208—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using variable penetration depth of the electron beam in the luminescent layer, e.g. penetrons

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

1449603 Cathode-ray tubes EMI Ltd 6 Dec 1973 [13 Sept 1972] 42463/72 Heading H1D In a cathode-ray tube having at least two guns, and a luminescent screen including at least two superimposed phosphor layers one of which is only excited by electrons of a higher energy than any other, the guns are arranged in the tube so that, in operation, at least two beams therefrom, one being of the higher energy, may be simultaneously and separately scanned in any desired respective scanning patterns. As described, the tube includes two guns, A and B, with separate scanning coils 6 and 7, which may be shielded from one another, and which permit registration of the scanning patterns of the two guns despite their difference in beam energy. The screen may comprise a first phosphor layer 4 of one colour, an optically transluscent layer 3 of titanium dioxide, a second phosphor layer 2 of a second colour, and an aluminium layer which extends also over the bulb envelope inner surface 10, has a lead 11, and constitutes the final anode.
GB4246372A 1972-09-13 1972-09-13 Cathode ray tubes and display devices Expired GB1449603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4246372A GB1449603A (en) 1972-09-13 1972-09-13 Cathode ray tubes and display devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4246372A GB1449603A (en) 1972-09-13 1972-09-13 Cathode ray tubes and display devices

Publications (1)

Publication Number Publication Date
GB1449603A true GB1449603A (en) 1976-09-15

Family

ID=10424555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4246372A Expired GB1449603A (en) 1972-09-13 1972-09-13 Cathode ray tubes and display devices

Country Status (1)

Country Link
GB (1) GB1449603A (en)

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Legal Events

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