Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2008-01-01
2008-01-01
Pham, Hai (Department: 2853)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S233000
Reexamination Certificate
active
10774367
ABSTRACT:
An optical writing system with at least two laser diodes capable of correcting hue deviations. The optical writing system is capable of correcting dot forming positions in the main scanning direction, and setting values for correction through an external key operation unit stored in a phase shift amount register by way of a CPU included in a main controller, and by applying values for arbitrarily shifting picture element clock phases for respective laser diodes. Thus, frequency fluctuations and characteristic changes in the laser diodes over time are compensated, positional precision with respect to a synchronization point is assured for respective laser diodes, picture images at the terminating edge in the main scanning direction is stabilized, and subtle hue variations can be reduced in half tone image portions during repeated full color image formations.
REFERENCES:
patent: 5565964 (1996-10-01), Tashiro et al.
patent: 6281922 (2001-08-01), Suzuki
patent: 6559976 (2003-05-01), Hirota
patent: 6807320 (2004-10-01), Sawada
patent: 2001/0028387 (2001-10-01), Maeda
patent: 2002/0063770 (2002-05-01), Takesue
patent: 2002/0126152 (2002-09-01), Morikawa
patent: 2002/0149666 (2002-10-01), Amada et al.
patent: 2003/0025782 (2003-02-01), Amada et al.
patent: 2003/0025785 (2003-02-01), Nihei et al.
patent: 2003/0112475 (2003-06-01), Shoda et al.
patent: 2003/0142865 (2003-07-01), Hirota et al.
patent: 2004/0184859 (2004-09-01), Shimmura
patent: 2005/0041261 (2005-02-01), Narushima et al.
patent: 10226104 (1998-08-01), None
patent: 2001091870 (2001-04-01), None
Martinez, Jr. Carlos A.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Pham Hai
Ricoh & Company, Ltd.
LandOfFree
Optical writing system and method, and image forming... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical writing system and method, and image forming..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical writing system and method, and image forming... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3926217