GB636483A - Improvements in electric discharge tubes comprising a source of electrons and a luminescent screen - Google Patents

Improvements in electric discharge tubes comprising a source of electrons and a luminescent screen

Info

Publication number
GB636483A
GB636483A GB10105/47A GB1010547A GB636483A GB 636483 A GB636483 A GB 636483A GB 10105/47 A GB10105/47 A GB 10105/47A GB 1010547 A GB1010547 A GB 1010547A GB 636483 A GB636483 A GB 636483A
Authority
GB
United Kingdom
Prior art keywords
activated
substance
zinc
manganese
electric discharge
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
GB10105/47A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB636483A publication Critical patent/GB636483A/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
    • H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)

Landscapes

  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

636,483. Luminescent screens for discharge tubes. PHILIPS LAMPS, Ltd. April 16, 1947, No. 10105. Convention date, Aug. 8, 1944. [Class 39 (i)] A luminescent screen for an electric discharge tube comprises one substance which emits ultra-violet rays upon electron bombardment and another substance which becomes luminous when energized by said ultra-violet rays. The substances may be admixed or in separate 'layers. The first substance may be calcium oxide activated with manganese, iron, copper, zinc, silver or bismuth ; or calcium phosphate activated with cerium ; or zinc silicate activated with titanium. The second substance may be zinc sulphide activated with copper or manganese or zinc cadmium sulphide activated with manganese. Several substances of each type may be mixed together. Reference has been directed by the Comptroller to Specification 582,444.
GB10105/47A 1944-08-08 1947-04-16 Improvements in electric discharge tubes comprising a source of electrons and a luminescent screen Expired GB636483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL636483X 1944-08-08

Publications (1)

Publication Number Publication Date
GB636483A true GB636483A (en) 1950-05-03

Family

ID=19788886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10105/47A Expired GB636483A (en) 1944-08-08 1947-04-16 Improvements in electric discharge tubes comprising a source of electrons and a luminescent screen

Country Status (1)

Country Link
GB (1) GB636483A (en)

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