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    • 11. 发明授权
    • Heater control device, image forming apparatus, and computer program product
    • 加热器控制装置,图像形成装置和计算机程序产品
    • US08530800B2
    • 2013-09-10
    • US12881708
    • 2010-09-14
    • Hiroshi AdachiEiji NemotoTakuma KasaiKiriko ChosokabeNorikazu Okada
    • Hiroshi AdachiEiji NemotoTakuma KasaiKiriko ChosokabeNorikazu Okada
    • H05B1/02
    • G03G15/80G03G15/2039
    • A heater control device includes a temperature detector that detects a temperature of a heated object heated by a heater; an alternating-current power supply for applying an alternating current voltage to the heater; a turn-on ratio decision unit that determines a turn-on ratio of the heater based on the temperature and a target temperature; a turn-on pattern decision unit that determines a partial turn-on pattern, as the turn-on pattern of the heater, which is a pattern of a turn-on ratio higher than the determined turn-on ratio in terms of a control-period, and to which a partial turn-on instead of a full turn-on is allocated on a half-wavelength basis of the alternating current voltage within the control period based on the turn-on ratio of the heater; and a turn-on controller that controls turn-on of the heater based on the determined turn-on pattern.
    • 一种加热器控制装置,包括:温度检测器,其检测由加热器加热的被加热物体的温度; 用于向所述加热器施加交流电压的交流电源; 基于所述温度和目标温度确定所述加热器的接通比的导通比判定单元; 确定部分开启模式的开启模式决定单元,作为加热器的点亮模式,其是作为控制开关模式的导通比高于所确定的导通率的模式, 并且基于加热器的接通比,在控制周期内的交流电压的基于半波长的基础上分配部分导通而不是完全导通; 以及基于确定的开启模式来控制加热器的接通的导通控制器。
    • 12. 发明授权
    • Image forming apparatus and heater control method
    • 图像形成装置和加热器控制方法
    • US08260165B2
    • 2012-09-04
    • US12819461
    • 2010-06-21
    • Kiriko ChosokabeEiji NemotoNorikazu OkadaTakuma Kasai
    • Kiriko ChosokabeEiji NemotoNorikazu OkadaTakuma Kasai
    • G03G15/20
    • G03G15/80G03G15/2039
    • An image forming apparatus includes a halogen heater in a fixing unit; an AC source applying an alternating voltage to the halogen heater; a half-wave control unit that performs the heater half-wave control to control the halogen heater on the half-wavelength basis, according to a heater-on/off pattern set for each control cycle having a predetermined length; a heater-off-time measuring unit that measures heater-off period of time; a phase-control-execution determining unit that determines, based on the measured heater-off period of time, whether the heater phase control is to be performed on the alternating voltage, the phase control being performed by shifting phase of the alternating voltage; and a phase control unit that performs, when the phase control is determined to be performed, the phase control only for a period of time depending on the measured heater-off period of time after switch-on of the heater and before execution of the half-wave control.
    • 图像形成装置包括固定单元中的卤素加热器; 将交流电源施加到所述卤素加热器的交流电源; 根据对每个具有预定长度的控制周期设置的加热器开/关模式,执行加热器半波控制以半波长基准控制卤素加热器的半波控制单元; 加热器关闭时间测量单元,其测量加热器关闭时间段; 相位控制执行确定单元,基于所测量的加热器关闭时间段来确定是否对交流电压执行加热器相位控制,通过交流电压的相位移相来执行相位控制; 以及相位控制单元,当相位控制被确定执行时,执行相位控制,该时间段取决于加热器接通之后的测量的加热器关闭时间段,并且在执行半个时间之前 波控制。