Control circuit for point-generating units of a write head

Details Control circuit for point-generating units of a write head Control circuit for point-generating units of a write head

1990-01-23

1991-04-09

Evans, Arthur G.

Boots, shoes, and leggings

364200, G06K 1500

Patent

active

050070045

ABSTRACT:
A circuit (10) which is intended to control point-generating units (20) of the write head (18) in a printer. To this end, the print circuit (20) constitutes an interface between a central unit (12), an external direct access memory (RAM; 14) and a driver stage (16) which is intended to activate the write head (18). The circuit (10) also includes a control module (26), a pixel buffer module (28) and a rotation module (32) connected electrically to the direct access memory (14). The control module (26) enables address decoding, internal data buses, a command register and a test logic unit to be controlled. The pixel buffer module (28) holds a buffer memory filled with pixel data, when necessary. The control module (26) and the pixel buffer module (28) are connected to the central unit (12). The rotation module (32) is intended to determine the format of input pixel data for a data flow which is regulated to the point geometry of the write head (18).

REFERENCES:
patent: 4491853 (1985-01-01), Hayashi et al.
patent: 4933875 (1990-06-01), Kojima

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