Halftone image recording apparatus and method based on first and second timing signals chosen from a plurality of synchronized clocks
US5760811A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1993 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Feb 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K15/128
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.