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    • 1. 发明授权
    • Fixing heater controlling method and an image forming device
    • 固定加热器控制方法和图像形成装置
    • US06301454B1
    • 2001-10-09
    • US09508876
    • 2000-03-14
    • Yoshiaki NishidaYasuhiro Suzuki
    • Yoshiaki NishidaYasuhiro Suzuki
    • G03G1520
    • G05D23/1951G03G15/2003
    • There are provided three periods of time immediately after an AC power-supply voltage is started to be applied to fixing heaters when the heater temperature falls below a target temperature: a first period for driving only a first heater; a second period for driving only a second heater following the first period; and a third period for driving the first and second heaters following the second period. During the first and second periods, the first and second heaters are thinning-controlled, respectively. At this time, at a cycle of 3 half-waves of the AC voltage applied to each fixing heater, a thinning frequency is changed from a large value to a smaller one. The third period includes first and second sub periods which are alternately repeated. In at least one of the first and second sub periods, the first and second heaters are thinning-controlled and the relation of the thinning controls of the two heaters is such that they are complementary to each other on the time axis.
    • 在加热器温度下降到目标温度以下时,在AC电源电压开始施加到定影加热器之后立即提供三个时间段:用于仅驱动第一加热器的第一周期; 第二时段,用于在第一时段之后仅驱动第二加热器; 以及在第二时段之后驱动第一和第二加热器的第三时段。 在第一和第二期间,第一和第二加热器分别变薄控制。 此时,在施加到每个定影加热器的AC电压的3个半波的周期,变稀频率从大值变为较小值。 第三时段包括交替重复的第一和第二子周期。 在第一和第二子周期中的至少一个中,第一和第二加热器变薄控制,并且两个加热器的变薄控制的关系使得它们在时间轴上彼此互补。