GB744807A - Improvements in or relating to cathode-ray tubes - Google Patents

Improvements in or relating to cathode-ray tubes

Info

Publication number
GB744807A
GB744807A GB28348/54A GB2834854A GB744807A GB 744807 A GB744807 A GB 744807A GB 28348/54 A GB28348/54 A GB 28348/54A GB 2834854 A GB2834854 A GB 2834854A GB 744807 A GB744807 A GB 744807A
Authority
GB
United Kingdom
Prior art keywords
cathode
relating
layer
ray tubes
magnesia
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
GB28348/54A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB744807A publication Critical patent/GB744807A/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
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers

Abstract

A cathode-ray tube fluorescent screen is coated internally with a layer of magnesia 7 by first evaporating thereon a layer of magnesium and subsequently heating in an atmosphere containing oxygen, for example air, to convert the magnesium into magnesia. The layer may be less than 1000 DEG in thickness as in Specification 744,776.
GB28348/54A 1952-04-04 1953-04-01 Improvements in or relating to cathode-ray tubes Expired GB744807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL744807X 1952-04-04

Publications (1)

Publication Number Publication Date
GB744807A true GB744807A (en) 1956-02-15

Family

ID=19822791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28348/54A Expired GB744807A (en) 1952-04-04 1953-04-01 Improvements in or relating to cathode-ray tubes

Country Status (1)

Country Link
GB (1) GB744807A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3222465A1 (en) * 1981-06-15 1982-12-30 Sony Corp., Tokyo CATHODE RAY TUBE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3222465A1 (en) * 1981-06-15 1982-12-30 Sony Corp., Tokyo CATHODE RAY TUBE

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