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    • 37. 发明授权
    • Image forming apparatus and image density control method
    • 图像形成装置和图像浓度控制方法
    • US07881629B2
    • 2011-02-01
    • US11932198
    • 2007-10-31
    • Nobutaka TakeuchiHitoshi IshibashiKohta FujimoriKayoko TanakaYushi HirayamaNaoto Watanabe
    • Nobutaka TakeuchiHitoshi IshibashiKohta FujimoriKayoko TanakaYushi HirayamaNaoto Watanabe
    • G03G15/10G03G15/08
    • G03G15/1605G03G15/0849G03G15/0853G03G2215/0161
    • In an image forming apparatus and an image density control method that are capable of suppressing the amount of toner consumed for a purpose other than image formation and responding to variation in the development ability of a development device due to environmental variation and the like such that a constant image density is obtained, the image density is maintained at a substantially fixed level by first target output value correcting means in accordance with a toner replacement amount and without consuming toner, and adjustment of the image density accompanying variation in the development ability due to environmental variation and the like is dealt with by second target output value correcting means in accordance with a toner pattern detection result. Hence, the frequency with which the toner pattern is detected in order to maintain the image density at a fixed level can be reduced in comparison with a case in which the image density is maintained at a fixed level on the basis of the toner pattern detection result alone, and as a result, the toner consumption amount can be suppressed.
    • 在图像形成装置和图像浓度控制方法中,能够抑制除了图像形成之外的目的而消耗的调色剂量,并且响应于由于环境变化等而导致的显影装置的显影能力的变化,使得 通过第一目标输出值校正装置根据调色剂更换量并且不消耗调色剂,图像浓度保持在基本上固定的水平,并且由于环境而伴随着显影能力的变化的图像浓度的调整 根据调色剂图案检测结果,由第二目标输出值校正装置处理变化等。 因此,与根据调色剂图案检测结果将图像浓度保持在固定水平的情况相比,可以减少为了将图像浓度保持在固定水平而检测调色剂图案的频率 ,因此可以抑制调色剂消耗量。