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Magnetomechanical Display Device

IP.com Disclosure Number: IPCOM000087644D
Original Publication Date: 1977-Feb-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Brandon, M: AUTHOR

Abstract

A portion consisting of four display elements 1 of a magnetomechanic display is shown in Fig. 1. A diagonal cross-section through one display element is shown in Fig. 2. Each display element consists of a black iron ball 2 contained in a slot 3 in a white screen 4. The screen 4 is permanently tilted from the horizontal so that normally all the balls 2 lie under the influence of gravity at the lower end of the slots 3.

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Magnetomechanical Display Device

A portion consisting of four display elements 1 of a magnetomechanic display is shown in Fig. 1. A diagonal cross-section through one display element is shown in Fig. 2. Each display element consists of a black iron ball 2 contained in a slot 3 in a white screen 4. The screen 4 is permanently tilted from the horizontal so that normally all the balls 2 lie under the influence of gravity at the lower end of the slots 3.

A two-dimensional matrix of magnetizable cores 5 lie beneath the screen, one core for each respective display element 1. A narrow neck portion 6 of each core is positioned adjacent the upper end of the slot 3 of the associated display element. The cores are threaded by so-called X wires 7 and Y wires 8 which are energizable in a known manner to selectively magnetize or demagnetize the cores 5. Stray magnetic flux around the narrow neck portion 6 of a magnetized core 5 attracts the iron ball 2 of the associated display element to the upper end of its slot 3. The upper positions of the balls 2 are shown in dotted outline in the figures.

A transparent cover 9 (Fig. 2), such as that described on page 691 of the IBM Technical Disclosure Bulletin Vol. 19, No. 2, July, 1976, overlays the screen 4. The cover 9 consists of a 'flys eye' lens system arranged so that each display element 1 is associated with a respective lens 10 positioned over the upper end of the associated slot 3. Thus, when a core 5 is magnetized the associa...