Single wall domain latrix for optical data processing system

DETAILED DESCRIPTION The optical page composer of the present invention is comprised of a magnetizable layer in which single wall domains or bubbles may be sustained and moved about and to which are inductively coupled a digit line and a perpendicular word line, the intersection of which forms four quadrants that define or are defined by a memory area in the layer.
An opaque shield is oriented in the memory area for optically shielding a bubble except when in the first quadrant within the memory area.
Coincident current selection, e.
g.
, concurrent half current selection, of a digit line and of a word line by half select write signals of the proper polarities permits the one fully selected memory area to be fully selected for the selective writing of a 1 or of a 0 therein while the full current selection of one word line permits the read operation to concurrently read out all memory areas along the one fully selected word line.
The optical page composer is preferably comprised of a magnetizable layer having orthogonal sets of D parallel digit lines and W parallel word lines, each intersection of which forms four quadrants that define or are defined by an associated memory area with an opaque shield oriented in three of the four quadrants of each memory area.
Coincident current selection of the digit lines and of the word lines by half select write signals of a first polarity for the writing of a 1 and of a second and opposite polarity for the writing of a 0 permits each separate one of the memory areas to be separately selected for the selective positioning of the associated bubble in either the first quadrant (write 1) or the third quadrant (write 0) of the associated memory area without substantially affecting the bubbles in the half-selected memory areas along the half-selected digit line and word line.
A full current selection of the one word line by a full select store signal then positions or transfers the bubbles in the fully selected memory areas along the one fully selected word line from the write 1 first quadrant and the write 0 third quadrant into the store 1 second quadrant and the store 0 third quadrant, respectively