Printer and process for printing different size dots by setting

Details Printer and process for printing different size dots by setting Printer and process for printing different size dots by setting

1996-06-13

1999-10-26

Yockey, David F.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347132, 347237, 347240, 358298, B41J 2385, B41J 2435, B41J 247, H04N 123

Patent

active

059737093

ABSTRACT:
An LED printer includes a printing control unit and an LED head. When a video signal received at the control unit has a higher resolution than the LED head, the control unit carries out the logical AND between successive bit data of the video signal to convert the video signal to a first signal. Corresponding to a line timing signal, this first signal is transferred as a head data signal to the LED head and is then printed on a basic raster scanning line. Further, the control unit also carries out the exclusive-OR between the successive bit data of the video signal so that the video signal is converted to a second signal and outputted to a line buffer. Corresponding to an additional line timing signal, the second signal is transferred as another head data signal to the LED head and is printed on an additional raster scanning line. The LED head drive energy for performing printing along the basic raster scanning line is set independently.

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Mono, M. Morris, Digital Design, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1984, pp. 119-121.

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