Printer varying pixel-shape to reduce jaggedness

Details Printer varying pixel-shape to reduce jaggedness Printer varying pixel-shape to reduce jaggedness

1992-12-15

1996-02-20

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358459, 382269, 347131, H04N 140, G06K 940, G01D 1514

Patent

active

054934109

ABSTRACT:
In a laser printer having a serving semiconductor laser 14 as the printer engine part 3, the irradiation of a laser beam R, forming one pixel, is divided into a plurality of lighting times, and non-lighting times in response to clock horizontal synchronous signals CLKH1 and CLKH2, generated by a printer controller 2, so that the form of a light energy distribution, on a photosensitive body, for forming one pixel is made substantially trapezoidal. With this construction, the form of each dot of pixels composing an image is made substantially trapezoidal. This can lead to improving the image quality of any curve d portion and the sloped-line portion of the image, by reducing jaggedness.

REFERENCES:
patent: 5017944 (1991-05-01), Kitamura et al.
patent: 5225848 (1993-07-01), Smith et al.
patent: 5255014 (1993-10-01), Haneda et al.
patent: 5262798 (1993-11-01), Reinten
patent: 5327524 (1994-07-01), Ng
patent: 5337074 (1994-08-01), Thornton

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