GB634722A - Improvements in or relating to luminescent screens - Google Patents

Improvements in or relating to luminescent screens

Info

Publication number
GB634722A
GB634722A GB2155/47A GB215547A GB634722A GB 634722 A GB634722 A GB 634722A GB 2155/47 A GB2155/47 A GB 2155/47A GB 215547 A GB215547 A GB 215547A GB 634722 A GB634722 A GB 634722A
Authority
GB
United Kingdom
Prior art keywords
crystals
luminescent
jan
support
substratum
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
GB2155/47A
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 GB634722A publication Critical patent/GB634722A/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
    • H01J29/20—Luminescent screens characterised by the luminescent material

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

634,722. Luminescent screens. PHILIPS LAMPS Ltd. Jan. 23, 1947, No. 2155. Convention date, Jan. 11, 1944. Drawings to Specification. [Class 39 (i)] A luminescent screen comprises rod-shaped luminescent crystals deposited substantially parallel to each other with their long dimension approximately normal to the surface of the support. Crystals of magnesium tungstate (long prisms) are suspended in benzene or toluol between two horizontal metal plates 3 mms. apart between which is a voltage of 1500 v. in the direction of gravity, the crystals depositing on the lower electrode which may carry a removable substratum layer of insulating material. One or both electrodes may be located outside the liquid. The substratum or support may be transparent, e.g. or opaque and reflecting, e.g. metal for C.R. tubes and glazed paper or cardboard for X-ray purposes. The crystals are secured by binders, e.g. nitrocellulose or ethyl cellulose, the suspending medium being vaporized by heating.
GB2155/47A 1944-01-11 1947-01-23 Improvements in or relating to luminescent screens Expired GB634722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL634722X 1944-01-11

Publications (1)

Publication Number Publication Date
GB634722A true GB634722A (en) 1950-03-29

Family

ID=19788849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2155/47A Expired GB634722A (en) 1944-01-11 1947-01-23 Improvements in or relating to luminescent screens

Country Status (1)

Country Link
GB (1) GB634722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062993A1 (en) * 1981-04-09 1982-10-20 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Cathode ray tube phosphor layers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062993A1 (en) * 1981-04-09 1982-10-20 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Cathode ray tube phosphor layers

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