NDLI: Magnetooptical display element using permalloy films

Content Provider	IEEE Xplore Digital Library
Author	Sugatani, S. Konishi, S. Sakurai, Y.
Copyright Year	1965
Abstract	Nixie tubes and CRT display elements are useful as a numerical indicator, but these require a large volume and comparatively high voltage source. Magnetooptical display elements provide a flat panel display with memory and are quite adaptable to batch-fabrication techniques. This paper describes the numerical display elements for the solid-state panel display, utilizing magnetic thin films. The display elements are composed of the magnetic thin-film, insulator, and conductor layers, and these layers are evaporated onto a glass substrate. A numerical display pattern is determined by the state of magnetization of the channel pieces, that is, local switching in the film, which can be accomplished by the drive pulse fields. The local switching is controllable by pulse current flowing through the selected drive lines. The local switching pattern in the film can be observed as a dark-on-bright pattern by the Kerr magneto-optic effect. The pattern, written by the drive currents, is memorized until subsequent alteration is performed. The drive current is a 1-μs 300-mA pulse and the bias field applied along the easy axis is 2.5 Oe. The contrast ratio obtained is 1:3. The size of numerical display pattern is 1 × 3.6 mm, and substrate is 10 × 10 mm no. 3 Corning glass.
Sponsorship	IEEE Magnetics Society
Starting Page	464
Ending Page	467
Page Count	4
File Size	456805
File Format	PDF
ISSN	00189464
Volume Number	5
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1969-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Flat panel displays Magnetooptic effects Magnetic films Glass Substrates Magnetic switching Cathode ray tubes Voltage Solid state circuits Insulation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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