Electronic circuit for supplying selected image signals to a the

Details Electronic circuit for supplying selected image signals to a the Electronic circuit for supplying selected image signals to a the

1991-08-23

1993-10-19

Grimley, A. T.

Recorders

Thermal recording

346108, G01D 1510

Patent

active

052550109

ABSTRACT:
There is described a simple and inexpensive circuit for a thermal printing system which provides various test and diagnostic image patterns. The circuit includes a dual-port RAM, an address counter, a handshake logic unit and a multiplex switch unit. The image patterns provided by this circuit, which are applied to the printing system at high speed and in real time (e.g., 10 m bits/sec.), visually verify the precise mechanical and electrical adjustment, normal operating performance, and the high quality print output of the overall printing system. Various test images are easily programmed off-line into this electronic circuit. This circuit, with its printed test images, provides a highly useful tool in the initial set-up and the subsequent maintaining of the operation of the printing system.

REFERENCES:
patent: 4386374 (1983-05-01), Kimoto
patent: 4476542 (1984-10-01), Crean et al.
patent: 4587396 (1986-05-01), Rubin
patent: 4620288 (1986-10-01), Welmers
patent: 4804976 (1989-02-01), Ohmori et al.
patent: 5065445 (1991-11-01), Kuwabara et al.
patent: 5103316 (1992-04-01), Ogura

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