G - Physics – 09 – G
Patent
G - Physics
09
G
G09G 3/20 (2006.01) G09F 9/37 (2006.01) G11C 29/50 (2006.01)
Patent
CA 2047911
The invention relates to circuit arrangement for checking a matrix composed of bistable matrix points each consisting of an electromagnet, whose one lead is connected with an associated column line and whose other lead is connected, depending on the direction of current flow, via oppositely polarized diodes with the associated row setting line and the associated row resetting line, in which the column lines, the row setting lines and the row resetting lines of the matrix can be activated during setting and resetting by means of a processor, a column decoder and a row decoder in such a way, that the column lines can be activated in a column cycle in sequence with a setting counter-potential or a resetting counter-potential, and where in the course of every individual column activation all row setting lines or row resetting lines can be activated sequentially with a setting potential or a resetting potential. It is possible, by means of optical couplers at the columns lines, the row setting and the row resetting lines, to derive comparative information with the aid of a code converter controlled by these optical couplers, which is compared in the processor with the actual setting or resetting information and which can be used to issue an error signal.
Dambach-Werke Gmbh
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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