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    • 1. 发明授权
    • Image forming apparatus and image forming method
    • 图像形成装置及图像形成方法
    • US08660448B2
    • 2014-02-25
    • US13363708
    • 2012-02-01
    • Masayuki OtsukaTakashi KitagawaMotoyuki Itoyama
    • Masayuki OtsukaTakashi KitagawaMotoyuki Itoyama
    • G03G15/06
    • G03G15/5041G03G15/5037
    • An image forming apparatus includes a photoreceptor, a developing apparatus, a developing bias supply power source, a control section for controlling a developing bias, a density sensor, and an arithmetic section. When an image density adjustment operation is performed, the arithmetic section determines a print-time developing bias in accordance with a detection result obtained by detecting, by the density sensor, a plurality of image density adjustment toner images formed by changing a developing bias. The print-time developing bias is set by the control section when printing is performed. also, In a case where a previous print-time developing bias falls within at least a low range of a predetermined range of the developing bias, the arithmetic section determines the print-time developing bias to a value between a reference developing bias for a target image density and the previous print-time developing bias.
    • 图像形成装置包括感光体,显影装置,显影偏压供给源,用于控制显影偏压的控制部,密度传感器和运算部。 当执行图像浓度调整操作时,运算部根据通过密度传感器检测通过改变显影偏压形成的多个图像浓度调节调色剂图像获得的检测结果来确定打印时显影偏压。 当执行打印时,打印时间显影偏压由控制部分设定。 此外,在先前的打印时间显影偏压落入显影偏压的预定范围的至少低范围的情况下,运算部将印刷时显影偏压确定为目标的参考显影偏压之间的值 图像密度和以前的打印时间显影偏差。
    • 2. 发明申请
    • IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
    • 图像形成装置和图像形成方法
    • US20120201556A1
    • 2012-08-09
    • US13363708
    • 2012-02-01
    • Masayuki OTSUKATakashi KitagawaMotoyuki Itoyama
    • Masayuki OTSUKATakashi KitagawaMotoyuki Itoyama
    • G03G15/06
    • G03G15/5041G03G15/5037
    • An image forming apparatus includes a photoreceptor, a developing apparatus, a developing bias supply power source, a control section for controlling a developing bias, a density sensor, and an arithmetic section. When an image density adjustment operation is performed, the arithmetic section determines a print-time developing bias in accordance with a detection result obtained by detecting, by the density sensor, a plurality of image density adjustment toner images formed by changing a developing bias. The print-time developing bias is set by the control section when printing is performed. also, In a case where a previous print-time developing bias falls within at least a low range of a predetermined range of the developing bias, the arithmetic section determines the print-time developing bias to a value between a reference developing bias for a target image density and the previous print-time developing bias.
    • 图像形成装置包括感光体,显影装置,显影偏压供给源,用于控制显影偏压的控制部,密度传感器和运算部。 当执行图像浓度调整操作时,运算部根据通过密度传感器检测通过改变显影偏压形成的多个图像浓度调节调色剂图像获得的检测结果来确定打印时显影偏压。 当执行打印时,打印时间显影偏压由控制部分设定。 此外,在先前的打印时间显影偏压落入显影偏压的预定范围的至少低范围的情况下,运算部将印刷时显影偏压确定为目标的参考显影偏压之间的值 图像密度和以前的打印时间显影偏差。
    • 4. 发明申请
    • IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
    • 图像形成装置和图像形成方法
    • US20090284770A1
    • 2009-11-19
    • US12436446
    • 2009-05-06
    • Katsuhiro NAGAYAMATakashi KitagawaMasayuki Otsuka
    • Katsuhiro NAGAYAMATakashi KitagawaMasayuki Otsuka
    • H04N1/60
    • H04N1/407
    • An image forming apparatus including: a black image forming section for forming a black image and a first black pattern for a coarse correction of black and optionally a second black pattern for a precise correction of black; a color image forming section for forming a color image optionally a third pattern for a coarse correction of color and optionally a fourth pattern for a precise correction of color; and a control section for allowing at least the first black pattern to be formed and optionally a second black pattern and third and fourth color patterns, and controlling to perform the coarse correction of black for correcting a forming condition of a black image to be formed and to perform optionally a precise correction of black, the coarse and precise correction of color based on the measurement of the formed pattern(s), wherein the control section controls to perform the coarse correction of black but not to perform the precise correction of black and the coarse and precise corrections of color in case a print job is acquired after a predetermined period elapses since the black image forming section has formed the first black pattern previously and the acquired print job includes a black-and-white page only.
    • 一种图像形成装置,包括:用于形成黑色图像的黑色图像形成部分和用于黑色粗略校正的第一黑色图案,以及可选地用于黑色的精确校正的第二黑色图案; 彩色图像形成部分,用于形成彩色图像,可选地用于粗略校正颜色的第三图案和可选地用于精确校正颜色的第四图案; 以及控制部分,用于至少允许形成第一黑色图案,并且可选地允许第二黑色图案和第三和第四颜色图案,并且控制执行用于校正要形成的黑色图像的形成条件的黑色的粗略校正;以及 基于所形成的图案的测量,可选地执行黑色的精确校正,颜色的粗略和精确校正,其中控制部分控制以执行黑色的粗略校正,但不执行黑色的精确校正 在黑图像形成部分已经形成第一黑色图案之后经过预定时间段之后获取打印作业的情况下的颜色的粗略和精确的校正,并且所获取的打印作业仅包括黑白页面。
    • 5. 发明申请
    • Image forming apparatus and toner supply control program for the same
    • 图像形成装置和调色剂供应控制程序相同
    • US20080080878A1
    • 2008-04-03
    • US11899475
    • 2007-09-06
    • Tatsuya TanakaKatsuhiro NagayamaTakashi KitagawaMasayuki Otsuka
    • Tatsuya TanakaKatsuhiro NagayamaTakashi KitagawaMasayuki Otsuka
    • G03G15/08
    • G03G15/0877G03G15/0849G03G15/0893G03G2215/0888
    • A digital color copier includes: a toner concentration storage which, as to a multiple number of developer blocks into which the developer that circulates in the developer device is virtually divided across the image forming width, stores the detected toner concentration of each developer block, detected by the toner concentration detector, separately for every developer block; a toner consumption predictor for predicting the first predicted toner consumption of the toner that is expected to be consumed and/or was consumed from the developer of every developer block during the first circulation, based on the developer's speed of conveyance in the developing device and the print processing speed; a toner concentration estimator for estimating, for every developer block, the toner supply point estimate as the toner concentration at the point where toner is supplied, by subtracting the first predicted toner consumption from the associated detected toner concentration and setting up a toner supply target value of the toner to be supplied from the toner supply device to the developing device in accordance with the predicted toner consumption during the second circulation of the developer inside the developing device that follows the first circulation.
    • 数字彩色复印机包括:调色剂浓度存储器,对于在显影剂装置中循环的显影剂在多个成像宽度上被虚拟分割的多个显影剂块,存储检测到的每个显影剂块的检测到的调色剂浓度 通过调色剂浓度检测器,分别用于每个显影剂块; 一种调色剂消耗预测器,用于基于显影装置中的显影装置的传送速度和第一次循环中的显影剂速度来预测预期在第一次循环期间从每个显影剂块的显影剂消耗和/或消耗的调色剂的第一预测调色剂消耗量 打印处理速度; 调色剂浓度估算器,用于通过从相关检测到的调色剂浓度中减去第一预测调色剂消耗量并设置调色剂供给目标值,为每个显影剂块估计调色剂供应点估计作为调色剂供应点处的调色剂浓度 根据在第一次循环之后的显影装置内的显影剂的第二次循环期间预测的调色剂消耗量,将从调色剂供应装置供应到显影装置的调色剂。
    • 6. 发明授权
    • Internal step-down power supply circuit
    • 内部降压电源电路
    • US06753721B2
    • 2004-06-22
    • US10243644
    • 2002-09-16
    • Masayuki OtsukaTeruhiro Harada
    • Masayuki OtsukaTeruhiro Harada
    • G05F110
    • G05F1/465
    • An internal step-down power supply circuit improves response performance (transition from a standby state to an active state in particular) of a system, without increasing current consumption. The internal step-down power supply circuit includes an output node for outputting an internal step-down power-supply potential; a driver for adjusting an external power-supply potential VDD and supplying it to the output node; a divider circuit for dividing a voltage developed at the output node and outputting the divided voltage; and a differential amplifier for comparing the divided voltage and a reference voltage. The differential amplifier outputs a voltage equivalent to twice a predetermined gain. The operational amplifier sets the conductance of first transistors for feeding a current responsive to the reference voltage to twice or more the conductance of second transistors for feeding a current responsive to the divided voltage.
    • 内部降压电源电路可以改善系统的响应性能(特别是从待机状态转换到活动状态),而不会增加电流消耗。 内部降压电源电路包括用于输出内部降压电源电位的输出节点; 用于调整外部电源电位VDD并将其提供给输出节点的驱动器; 分压电路,用于分压在输出节点处产生的电压并输出分压; 以及用于比较分压和参考电压的差分放大器。 差分放大器输出相当于预定增益两倍的电压。 运算放大器设置第一晶体管的电导,用于将响应于参考电压的电流馈送到响应于分压的两个或更多个用于馈送电流的电流的第二晶体管的电导。