Recorders – Printing – dotting – or punching marker – Ink transfer support or moving means
Patent
1992-07-13
1993-08-03
Braun, Fred L.
Recorders
Printing, dotting, or punching marker
Ink transfer support or moving means
346107R, 355 69, 358475, G01D 1514, G03G 1504
Patent
active
052333701
ABSTRACT:
An exposure method for use in an image forming apparatus for having each of edge emission type electroluminescent (EL) devices emit light a plurality of times to form one pixel of an image. The gradient of the image outline relative to the horizontal scanning direction is checked to see if it falls in one of two ranges: between 0.degree. and 45.degree., or between 45.degree. and 90.degree.. If the gradient falls between 0.degree. and 45.degree., the edge emission type EL devices are made to emit light selectively according to the proportion of image-filled regions in the pixels intersected by the outline. If the gradient falls between 45.degree. and 90.degree., either the light intensity of the edge emission type EL devices is established according to the proportion of image-filled regions in the pixels intersected by the outline, or the number of the pulses which exceed a threshold voltage and which are fed to the edge emission type EL devices is gradually reduced according to reductions of image-filled regions in the pixels intersected by the outline.
REFERENCES:
patent: 4394662 (1983-07-01), Yoshida et al.
patent: 4868587 (1989-09-01), Loce et al.
patent: 5128696 (1992-07-01), Watanabe
patent: 5142337 (1992-08-01), Karidis et al.
Hara Kei
Kobuse Osamu
Braun Fred L.
Tokyo Electric Co. Ltd.
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