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    • 115. 发明申请
    • Constant voltage control device
    • 恒压控制装置
    • US20070057657A1
    • 2007-03-15
    • US11331017
    • 2006-01-13
    • Koji HashimotoManabu Yamashita
    • Koji HashimotoManabu Yamashita
    • G05F1/00
    • H02M3/158H02M2001/009Y10T307/383
    • A first output voltage Vcc is obtained via a first switching element from an external power supply, and a second output voltage Vme via a second switching element cascade-connected to the first switching element. The first switching element has a base current continuously controlled by a first comparator/amplifier to maintain the voltage Vcc at a predetermined value. The second switching element has a base current continuously controlled by a second comparator/amplifier to maintain the voltage Vme at a predetermined value. A third switching element connected in parallel to the first switching element and controlled by a duty-factor control circuit makes a bypass power supply to maintain a current flowing through the first switching element not more than a predetermined value. Thus, a constant voltage control device obtaining two types of stabilized voltages from external power supply of large voltage variation can reduce power consumption and improve voltage control accuracy.
    • 经由第一开关元件从外部电源获得第一输出电压Vcc,并且经由与第一开关元件级联连接的第二开关元件获得第二输出电压Vme。 第一开关元件具有由第一比较器/放大器连续控制的基极电流,以将电压Vcc保持在预定值。 第二开关元件具有由第二比较器/放大器连续控制的基极电流,以将电压Vme保持在预定值。 与第一开关元件并联并由占空比控制电路控制的第三开关元件使得旁路电源将流过第一开关元件的电流维持在不超过预定值。 因此,从具有大电压变化的外部电源获得两种类型的稳定电压的恒压控制装置可以降低功耗并提高电压控制精度。
    • 120. 发明申请
    • Electrophotographic image forming apparatus
    • 电子照相成像设备
    • US20060233560A1
    • 2006-10-19
    • US11398726
    • 2006-04-06
    • Kinya HaradaKoji Hashimoto
    • Kinya HaradaKoji Hashimoto
    • G03G15/08
    • G03G15/0856G03G15/0862G03G15/0891G03G2215/0119G03G2221/183
    • An image forming apparatus includes an image bearing member on which an electrostatic latent image is capable of being formed; a developer accommodating container for accommodating a developer for developing the electrostatic latent image; a detecting device for detecting a remaining amount of the developer in the developer accommodating container, wherein the detecting device detects the remaining amount during a period in which no image forming operation is performed; a developer feeding member for feeding and stirring the developer in the developer accommodating container, the developer stirring member being rotatable at a speed which is lower during detection of the remaining amount than when an image forming operation is performed, wherein the detecting device detects first, second and third developer remaining amounts in first, second and third remaining amount detecting periods, respectively, in the order named, and wherein an interval between the second detection period and the third detection period is changed on the basis of the first and second remaining amounts.
    • 图像形成装置包括能够形成静电潜像的图像承载部件; 用于容纳用于显影静电潜像的显影剂的显影剂容纳容器; 用于检测显影剂容纳容器中的显影剂剩余量的检测装置,其中检测装置在不执行图像形成操作的时段期间检测剩余量; 用于在显影剂容纳容器中供给和搅拌显影剂的显影剂供给构件,显影剂搅拌构件可以在检测剩余量时比在执行图像形成操作时低的速度旋转,其中检测装置首先检测, 第二和第三显影剂剩余量分别按照所述的顺序分配在第一,第二和第三剩余量检测周期中,并且其中基于第一和第二剩余量改变第二检测周期和第三检测周期之间的间隔 。