Incremental printing of symbolic information – Electric marking apparatus or processes – Electrostatic
Patent
1993-02-03
1998-04-21
Fuller, Benjamin R.
Incremental printing of symbolic information
Electric marking apparatus or processes
Electrostatic
358298, 358457, B41J 2385, G03G 1304, H04N 121, H04N 140
Patent
active
057423172
ABSTRACT:
A recording apparatus of the electrophotographic system such as a laser beam printer is provided. An image processing apparatus which is connected between a recording control section and a recording mechanism section of such a recording apparatus is also provided. The apparatus comprises: an input unit for inputting image information of a density lower than a recording density of the recording mechanism section produced by the recording control section; a memory to store the image information supplied from the input unit by an amount of a plurality of main scan lines; a referring circuit to refer to the image information of a target pixel as a recording pixel and its peripheral pixels from the image information group stored in the memory; a detector to detect that the recording pixel and its peripheral pixels form a part of a predetermined half tone pattern which is constructed by a plurality of pixels as a result of the reference by the referring circuit; a converter to convert the image information of the recording pixel into the image information of a density which is at least equal to or larger than a recording density of the recording mechanism section in accordance with the result of the detection by the detector; and a transmitting circuit to transmit the image information converted by the converter to the recording mechanism section.
REFERENCES:
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4841375 (1989-06-01), Nakajima et al.
patent: 4847641 (1989-07-01), Tung
patent: 5101283 (1992-03-01), Seki et al.
Cannon Kabushiki Kaisha
Fuller Benjamin R.
Gordon Raquel Yvette
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