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    • 9. 发明授权
    • Electrophotographic image forming apparatus comprising means for
automatically adjusting image reproduction density
    • 电子照相图像形成装置包括用于自动调节图像再现浓度的装置
    • US5453773A
    • 1995-09-26
    • US799609
    • 1991-11-27
    • Yoshihiro HattoriKazuyuki FukuiTakanobu YamadaYoshikazu Naito
    • Yoshihiro HattoriKazuyuki FukuiTakanobu YamadaYoshikazu Naito
    • G03G15/00H04N1/407G01D15/14H04N1/21
    • G03G15/5041G03G15/5037H04N1/407G03G2215/00037
    • In an electrophotographic image forming apparatus including a charger for electrically charging the photoconductor to a predetermined initial electric potential, a laser projects a light onto the photoconductor so as to form an electrostatic latent image thereon, and a developing device develops the latent image with toner so as to form a toner image thereon. Further, a charger controller controls the charger based on a detection result of a detector for detecting a state of the photoconductor so that the initial electric potential of the photoconductor changes in a predetermined range, and a selection controller selects one of the plurality of gradation correction data stored in a storage unit based on the detection result of the detector when the initial electric potential of the photoconductor is an upper or lower limit value of the predetermined range. Moreover, a light projecting controller controls the laser to change a light amount of the light projected, based on the gradation correction data selected by the selection controller, according to an image density signal for representing densities of respective pixels of an image to be formed.
    • 在包括用于将感光体电荷充电至预定初始电位的充电器的电子照相图像形成装置中,激光器将光投射到光电导体上以在其上形成静电潜像,并且显影装置利用调色剂显影潜像 以便在其上形成调色剂图像。 此外,充电器控制器基于用于检测感光体的状态的检测器的检测结果来控制充电器,使得感光体的初始电位在预定范围内变化,并且选择控制器选择多个灰度校正中的一个 当感光体的初始电位为预定范围的上限或下限值时,基于检测器的检测结果存储在存储单元中的数据。 此外,光投影控制器根据用于表示要形成的图像的各像素的浓度的图像浓度信号,基于由选择控制器选择的灰度校正数据来控制激光改变投射光的光量。