Browse Prior Art Database

Bubble Lattice File Display

IP.com Disclosure Number: IPCOM000083295D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Chaudhari, P: AUTHOR

Abstract

A bubble lattice display can be provided using a double layer of magnetic bubble materials, as shown in Fig. 1. The two layers of bubble material are separated by a nonmagnetic spacer, which allows magnetic interaction between bubbles in the different layers. The Faraday effect (transmission) or the Kerr effect (reflection) can be used to indicate the presence and absence of single or double bubbles.

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Bubble Lattice File Display

A bubble lattice display can be provided using a double layer of magnetic bubble materials, as shown in Fig. 1. The two layers of bubble material are separated by a nonmagnetic spacer, which allows magnetic interaction between bubbles in the different layers. The Faraday effect (transmission) or the Kerr effect (reflection) can be used to indicate the presence and absence of single or double bubbles.

The amount of rotation of polarization of the input light beam incident on the double-layer structure will depend on the length of the bubble domain, and will differ in the case of a single-bubble domain than in the case of a double-bubble arrangement. For instance, an analyzer can be set to block light which has traveled through only a single bubble, while passing light which traveled through a double-bubble arrangement. In this manner, high contrasts can be achieved.

The bubble domains can be manipulated by moving a lattice of bubble domains which is present in one of the bubble layers. This can be done by exerting forces on the bubble domains in outside columns of the lattice, where the force is then transmitted to other columns of bubble domains in the lattice. Thus, bubble domains can be moved without using overlay structures for determining each but position. This means that an essentially structureless display is provided so that maximum viewing will be obtained.

In Fig. 2, portion (A) shows a top view of the display system in which...