Electronic system for an indicator device having a matrix compos

Details Electronic system for an indicator device having a matrix compos Electronic system for an indicator device having a matrix compos

1991-08-01

1994-04-05

Beausoliel, Jr., Robert W.

Excavating

G06F 702

Patent

active

053012003

ABSTRACT:
An electronic system for checking a matrix composed of bistable matrix points comprising an electromagnet, one lead of which is connected to a corresponding column line and the other lead of which is connected, depending on the direction of current flow, through oppositely polarized diodes to a corresponding row setting line and a corresponding row resetting line. The column lines, the row setting lines and the row resetting lines of the matrix are activated during setting and resetting by a processor, a column decoder and a row decoder such that the column lines are activated in a column cycle in sequence with a setting counter-potential or a resetting counter-potential, and where during the course of every individual column activation, all row setting lines or row resetting lines are activated sequentially with a setting potential or a resetting potential. It is possible, by using 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 information is compared in the processor to the actual setting or resetting information and which is used to generate an error signal.

REFERENCES:
patent: 4069480 (1978-01-01), Helwig
patent: 4263647 (1981-04-01), Merrell et al.
patent: 4675575 (1987-06-01), Smith et al.
Patent Abstracts of Japan, vol. 12, No. 463 (P-796) Dec. 6, 1988.
Patent Abstracts of Japan, vol. 13, No. 57 (P-825) Feb. 9, 1989.
B. Karpf. "Bistabile elektromagnetische Grossanzeigen." Der Elektroniker [Electronic Technician]. Jul. 1984: pp. 62-65.
"Parallel und seriell ansteuerbar." eee. Nov. 1986. No. 23: Vom. 18: pp. 32 and 34.

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