Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2005-08-17
2008-08-26
Tran, Huan H (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
Reexamination Certificate
active
07417660
ABSTRACT:
An image forming apparatus generates a PWM signal corresponding to input image data and controls a timing of a light source to emit a light beam based on the PWM signal in order to perform tone reproduction. The image forming apparatus includes a data processing unit configured to generate the PWM signal for one pixel based on image data for continuous two pixels in the image data. The data processing unit selects an origin of pulse growth in generation of the PWM signal for one pixel in accordance with the image data for the two pixels to generate the PWM signal.
REFERENCES:
patent: 6111664 (2000-08-01), Aoki et al.
patent: 7031020 (2006-04-01), Aoki et al.
patent: 07-294837 (1995-11-01), None
Kaji Hajime
Kawakami Takayuki
Mori Akihito
Motoyama Hajime
Noguchi Junichi
Canon Kabushiki Kaisha
Canon USA Inc IP Div
Tran Huan H
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