Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-04-07

2011-12-06

Gray, David (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S051000, C399S072000

Reexamination Certificate

active

08073349

ABSTRACT:
An image forming apparatus capable of keeping reproducibility and gradation in balance and outputting high-quality images. A primary electrostatic charger charges a photosensitive drum. A polygon scanner irradiates the drum with a laser beam to form an electrostatic latent image on the drum. A developing device develops the latent image into a toner image by applying a developing bias to the drum. In performing development by the developing device at a preset environmental contrast potential, a CPU determines a required contrast potential for obtaining a target maximum density. The CPU compares between the environmental contrast potential and the required contrast potential. Further, the CPU sets an upper limit value for a set contrast potential to be set to the developing device according to the result of the comparison, and sets an output level of the laser light to be output from the developing device.

REFERENCES:
patent: 5812903 (1998-09-01), Yamada et al.
patent: 5839018 (1998-11-01), Asanuma et al.
patent: 6029021 (2000-02-01), Nishimura et al.
patent: 6215968 (2001-04-01), Uehara et al.
patent: 6223007 (2001-04-01), Kitagawa et al.
patent: 6288733 (2001-09-01), Nakazawa et al.
patent: 6415114 (2002-07-01), Nakazato et al.
patent: 6501917 (2002-12-01), Karasawa
patent: 6516162 (2003-02-01), Ino et al.
patent: 6529694 (2003-03-01), Fukaya et al.
patent: 6700595 (2004-03-01), Sugiyama et al.
patent: 6701110 (2004-03-01), Ono
patent: 6859628 (2005-02-01), Kobashigawa
patent: 7031020 (2006-04-01), Aoki et al.
patent: 7058326 (2006-06-01), Toyama
patent: 7149439 (2006-12-01), Hirata et al.
patent: 7187879 (2007-03-01), Zaima
patent: 7242876 (2007-07-01), Zaima
patent: 7269362 (2007-09-01), Hama et al.
patent: 7336910 (2008-02-01), Kamiya
patent: 7385737 (2008-06-01), Zaima
patent: 7394999 (2008-07-01), Zaima
patent: 7567761 (2009-07-01), Kin et al.
patent: 7577371 (2009-08-01), Zaima
patent: 7639956 (2009-12-01), Naito et al.
patent: 7664412 (2010-02-01), Taguchi et al.
patent: 7684715 (2010-03-01), Zaima
patent: 7764889 (2010-07-01), Hamaya et al.
patent: 2002/0126196 (2002-09-01), Yamauchi
patent: 2004/0105689 (2004-06-01), Shimura et al.
patent: 2004/0240899 (2004-12-01), Ebe
patent: 2005/0030562 (2005-02-01), Hama et al.
patent: 2005/0286086 (2005-12-01), Takahashi et al.
patent: 2006/0098997 (2006-05-01), Kim et al.
patent: 2006/0140650 (2006-06-01), Yokote
patent: 2008/0003003 (2008-01-01), Watanabe et al.
patent: 2008/0025741 (2008-01-01), Yamashita et al.
patent: 2008/0124115 (2008-05-01), Oki
patent: 2008/0175608 (2008-07-01), Kobashigawa
patent: 2008/0205923 (2008-08-01), Takeuchi et al.
patent: 2010/0067932 (2010-03-01), Fujiwara
patent: 2010/0266296 (2010-10-01), Ochiai
patent: 2010/0290799 (2010-11-01), Komiya
patent: 2011/0064430 (2011-03-01), Mitamura et al.
patent: 2011/0116118 (2011-05-01), Nakase
patent: 2011/0206394 (2011-08-01), Takenaka
patent: 2011/0222878 (2011-09-01), Ochi et al.
patent: 62-296669 (1987-12-01), None
patent: 63-185279 (1988-07-01), None

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