Print engine/controller for driving an inkjet printhead

Details Print engine/controller for driving an inkjet printhead Print engine/controller for driving an inkjet printhead

2007-03-20

2007-03-20

Gordon, Raquel Y. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

10949294

ABSTRACT:
A print engine/controller for driving an inkjet printhead is provided. The print engine/controller comprises: (a) an interface for receiving compressed page data; (b) a plurality of decoders, each decoder being configured for decoding respective types of image planes in the received compressed page data; and (c) a half-toner/compositor for compositing image plane data, the half-toner/compositor comprising: (i) a dot merger unit for taking bits from the respective planes as inputs; (ii) a color mask register for holding masking bits in equal number to the number of image planes; and (iii) means for ANDing respective input bits to the dot merger with respective color mask register bits, and means for ORing the resultant bits together to form an output bit in a channel for which there is an ink at the printhead.

REFERENCES:
patent: 5737455 (1998-04-01), Harrington et al.
patent: 5805178 (1998-09-01), Silverbrook
patent: 5909227 (1999-06-01), Silverbrook
patent: 5914737 (1999-06-01), Silverbrook
patent: 6805419 (2004-10-01), Walmsley

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