Halftone image recording apparatus and method based on first and

Details Halftone image recording apparatus and method based on first and Halftone image recording apparatus and method based on first and

1993-02-24

1998-06-02

Fuller, Benjamin R.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347254, 358298, B41J 2385, B41J 247, G03G 1304

Patent

active

057608113

ABSTRACT:
A half-tone image recorder in which input digital data is represented by a plurality of bit data for each pixel. A data conversion device outputs digital data indicative of a recording-start position and a recording-end position, based on the input digital data. A recording device such as a laser printer records an image in accordance with the output digital data from the data conversion device. The data conversion device controls a first value of the digital data indicative of the recording-start position and a second value of the digital data indicative of the recording-end position so as to change a black-area growing direction within one pixel in the recorded image. This results in the recordation of a high-quality half-tone image without conspicuous vertical stripes and without conspicuous white stripes in the main-scanning direction of the recording device due to pitch irregularity.

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patent: 4864326 (1989-09-01), Kawamura et al.
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patent: 4977458 (1990-12-01), Granger et al.
patent: 5014137 (1991-05-01), Shimada
patent: 5206719 (1993-04-01), Ikeda et al.

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