GB539428A - Improvements in or relating to luminescent screens - Google Patents

Improvements in or relating to luminescent screens

Info

Publication number
GB539428A
GB539428A GB417740A GB417740A GB539428A GB 539428 A GB539428 A GB 539428A GB 417740 A GB417740 A GB 417740A GB 417740 A GB417740 A GB 417740A GB 539428 A GB539428 A GB 539428A
Authority
GB
United Kingdom
Prior art keywords
support
layer
coating
viewing side
light absorbing
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
GB417740A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB417740A priority Critical patent/GB539428A/en
Publication of GB539428A publication Critical patent/GB539428A/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
    • H01J29/185—Luminescent screens measures against halo-phenomena

Abstract

539,428. Cathode-ray tubes. PULESTON, R., and WATTON, W. L. March 6, 1940, No. 4177. [Class 39 (i)] In luminescent screens as used in television receiving tubes wherein the fluorescent layer 1- is carried on a transparent support 2 through which the picture is viewed a light absorbing layer or coating 9 is applied to the support on the viewing side ; while reducing to some extent the light directly received by a viewer it reduces to a far greater extent any scattered rays. The coating may have the same refractive index as the support ; it may be of resinous material or a cellulose derivative or mixtures of the two incorporated with a plasticizer and may contain a dye or pigment such as carbon black. Instead of a layer the support 2 may be rendered light absorbing by including materials in the glass. Specifications 417,435 and 426,789 are referred to. According to the Provisional Specification the absorbing layer need not be arranged on the viewing side of the support.
GB417740A 1940-03-06 1940-03-06 Improvements in or relating to luminescent screens Expired GB539428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB417740A GB539428A (en) 1940-03-06 1940-03-06 Improvements in or relating to luminescent screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB417740A GB539428A (en) 1940-03-06 1940-03-06 Improvements in or relating to luminescent screens

Publications (1)

Publication Number Publication Date
GB539428A true GB539428A (en) 1941-09-10

Family

ID=9772156

Family Applications (1)

Application Number Title Priority Date Filing Date
GB417740A Expired GB539428A (en) 1940-03-06 1940-03-06 Improvements in or relating to luminescent screens

Country Status (1)

Country Link
GB (1) GB539428A (en)

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