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    • 1. 发明申请
    • Image forming apparatus utilizing a piezoelectric-transformer high-voltage power supply and method for controlling the same
    • 利用压电变压器高压电源的图像形成装置及其控制方法
    • US20070018589A1
    • 2007-01-25
    • US11333075
    • 2006-01-17
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiJun Haruna
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiJun Haruna
    • F02P3/12
    • H01L41/044G03G15/80
    • A piezoelectric-transformer high-voltage power supply in combination with an image-forming apparatus including a latent-image forming section configured to form an electrostatic latent image on an image carrier, a developing section configured to form a toner image on the electrostatic latent image, and a transfer section configured to transfer the toner image onto a transfer material includes a piezoelectric transformer; a piezoelectric-transformer drive circuit; an output-voltage setting-signal output circuit configured to output an output-voltage setting-signal; an output-voltage detector circuit, and a drive control circuit configured to output a control signal on the basis of a signal from the output-voltage detector circuit and the output-voltage setting-signal, for controlling the piezoelectric-transformer drive circuit. The output-voltage setting-signal output circuit outputs an output-voltage setting-signal corresponding to a voltage lower than a target voltage and, then, another output-voltage setting-signal corresponding to the target voltage.
    • 一种压电变压器高压电源,其与包括被构造成在图像载体上形成静电潜像的潜像形成部分的图像形成装置组合,显影部分,被配置为在静电潜像上形成调色剂图像 以及被配置为将调色剂图像转印到转印材料上的转印部分包括压电变压器; 压电变压器驱动电路; 输出电压设定信号输出电路,被配置为输出输出电压设定信号; 输出电压检测器电路和驱动控制电路,被配置为基于来自输出电压检测器电路的信号和输出电压设置信号输出控制信号,用于控制压电变压器驱动电路。 输出电压设定信号输出电路输出与低于目标电压的电压相对应的输出电压设定信号,然后输出与目标电压对应的另一输出电压设定信号。
    • 3. 发明申请
    • Image forming apparatus and power supply
    • 成像设备和电源
    • US20070025753A1
    • 2007-02-01
    • US11333484
    • 2006-01-17
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • G03G15/00
    • G03G15/5004G03G15/163G03G15/6535G03G2215/00679G03G2215/00776H01L41/044H03L1/028
    • An image forming apparatus includes a high-voltage power supply having a piezoelectric transformer. The power supply includes a positive output voltage generation circuit and a negative output voltage generation circuit. Each of the positive output voltage generation circuit and the negative output voltage generation circuit includes a piezoelectric transformer, a piezoelectric transformer driving circuit, an output voltage detection circuit, and a drive control circuit for outputting a control signal for controlling the piezoelectric transformer driving circuit using a signal from the output voltage detection circuit and an output voltage setting signal for setting an output voltage. The positive output voltage generation circuit and the negative output voltage generation circuit are simultaneously turned on when the output polarity of the high-voltage power supply with a piezoelectric transformer is switched.
    • 图像形成装置包括具有压电变压器的高压电源。 电源包括正输出电压产生电路和负输出电压产生电路。 正输出电压产生电路和负输出电压产生电路中的每一个包括压电变压器,压电变压器驱动电路,输出电压检测电路和驱动控制电路,用于输出用于控制压电变压器驱动电路的控制信号,所述控制信号使用 来自输出电压检测电路的信号和用于设定输出电压的输出电压设定信号。 当切换具有压电变压器的高电压电源的输出极性时,正输出电压产生电路和负输出电压产生电路同时导通。
    • 4. 发明授权
    • Image forming apparatus and power supply
    • 成像设备和电源
    • US07558501B2
    • 2009-07-07
    • US11333484
    • 2006-01-17
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • Tohru SaitoMasahiro SuzukiOsamu NagasakiKoichi Suzuki
    • G03G15/00G03G15/16
    • G03G15/5004G03G15/163G03G15/6535G03G2215/00679G03G2215/00776H01L41/044H03L1/028
    • An image forming apparatus includes a high-voltage power supply having a piezoelectric transformer. The power supply includes a positive output voltage generation circuit and a negative output voltage generation circuit. Each of the positive output voltage generation circuit and the negative output voltage generation circuit includes a piezoelectric transformer, a piezoelectric transformer driving circuit, an output voltage detection circuit, and a drive control circuit for outputting a control signal for controlling the piezoelectric transformer driving circuit using a signal from the output voltage detection circuit and an output voltage setting signal for setting an output voltage. The positive output voltage generation circuit and the negative output voltage generation circuit are simultaneously turned on when the output polarity of the high-voltage power supply with a piezoelectric transformer is switched.
    • 图像形成装置包括具有压电变压器的高压电源。 电源包括正输出电压产生电路和负输出电压产生电路。 正输出电压产生电路和负输出电压产生电路中的每一个包括压电变压器,压电变压器驱动电路,输出电压检测电路和驱动控制电路,用于输出用于控制压电变压器驱动电路的控制信号,所述控制信号使用 来自输出电压检测电路的信号和用于设定输出电压的输出电压设定信号。 当切换具有压电变压器的高电压电源的输出极性时,正输出电压产生电路和负输出电压产生电路同时导通。
    • 5. 发明申请
    • TECHNOLOGY FOR REDUCING CIRCUIT OSCILLATIONS AND RIPPLE IN A HIGH-VOLTAGE POWER SUPPLY USING A PIEZOELECTRIC TRANSFORMER
    • 使用压电变压器降低高压电源电路振荡和纹波的技术
    • US20110097100A1
    • 2011-04-28
    • US12894847
    • 2010-09-30
    • Osamu Nagasaki
    • Osamu Nagasaki
    • G03G15/00G03G15/02H02M3/335
    • H02M1/14G03G15/80H01L41/044H02M3/335
    • A high-voltage power supply comprises the following components. A piezoelectric transformer outputs a voltage in accordance with a supplied drive frequency. A rectification part is connected to an output side of the piezoelectric transformer. A drive frequency generating part generates the drive frequency supplied to the piezoelectric transformer. A voltage detection part detects an output voltage of the piezoelectric transformer or the rectification part. A control part controls the drive frequency generating part such that a drive frequency corresponding to the output voltage detected by the voltage detecting part is generated. A first time constant, which is a time constant of the control part, is smaller than a second time constant, which is a time constant of a control target including the piezoelectric transformer and the rectification part. A third time constant, which is a time constant of the voltage detecting part, is smaller than the second time constant.
    • 高压电源包括以下组件。 压电变压器根据所提供的驱动频率输出电压。 整流部连接到压电变压器的输出侧。 驱动频率产生部分产生提供给压电变压器的驱动频率。 电压检测部检测压电变压器或整流部的输出电压。 控制部分控制驱动频率产生部分,使得产生与电压检测部分检测到的输出电压对应的驱动频率。 作为控制部的时间常数的第一时间常数小于作为包括压电变压器和整流部的控制对象的时间常数的第二时间常数。 作为电压检测部的时间常数的第三时间常数小于第二时间常数。
    • 7. 发明授权
    • Power supply apparatus, and image forming apparatus having the same
    • 电源装置和具有该电源装置的图像形成装置
    • US07265479B2
    • 2007-09-04
    • US11275635
    • 2006-01-20
    • Atsuhiko YamaguchiHiroshi ManoOsamu NagasakiKouji Yasukawa
    • Atsuhiko YamaguchiHiroshi ManoOsamu NagasakiKouji Yasukawa
    • H01L41/107
    • H02M3/28G03G15/80H02M1/14H02M3/156H02M2001/008
    • In a power supply apparatus including a plurality of power supply circuits, each of the power supply circuits has a piezoelectric transformer, a rectification element which rectifies and smoothes a voltage output from the piezoelectric transformer in accordance with a load and outputs the voltage, a voltage-controlled oscillator which controls the frequency of an output signal in accordance with an input control signal, and a power supply voltage supply element which is driven by a signal output from the voltage-controlled oscillator and supplies a power supply voltage to the piezoelectric transformer. One power supply circuit includes a resonance frequency change unit which is connected to the output side of the piezoelectric transformer. The resonance frequency change unit drives the piezoelectric transformer of the power supply circuit at a driving frequency which is different from the driving frequency of the piezoelectric transformer in another power supply circuit by shifting the peak of the resonance frequency.
    • 在包括多个电源电路的电源装置中,每个电源电路具有压电变压器,整流元件,用于根据负载对从压电变压器输出的电压进行整流和平滑,并输出电压 控制的振荡器,其根据输入控制信号控制输出信号的频率;以及电源电压供应元件,其由从压控振荡器输出的信号驱动并将电源电压提供给压电变压器。 一个电源电路包括连接到压电变压器的输出侧的谐振频率改变单元。 谐振频率改变单元通过使谐振频率的峰值偏移来驱动电源电路的压电变压器,该驱动频率与另一个电源电路中的压电变压器的驱动频率不同。
    • 9. 发明申请
    • IMAGE FORMING APPARATUS AND STAPLER
    • 图像形成装置和装订器
    • US20120082497A1
    • 2012-04-05
    • US13252415
    • 2011-10-04
    • Osamu Nagasaki
    • Osamu Nagasaki
    • G03G15/00B27F7/36
    • B27F7/17G03G15/6544G03G2215/00827
    • An image forming apparatus having a stapler includes an image forming unit configured to form an image on a recording material, a power source configured to supply electric power to the image forming unit and the stapler, and a control unit configured to control the operation of the stapler. In the image forming apparatus, a time period for prohibiting the operation of the stapler is set such that a total of a power consumption of the image forming unit and a power consumption of the stapler is equal to or less than an electric power the power source can supply so as to perform the operation of the stapler and the operation of the image forming unit partially in parallel with each other.
    • 具有订书机的图像形成装置具备图像形成单元,被配置为在记录材料上形成图像,被配置为向图像形成单元和订书机供电的电源,以及控制单元, 订书机。 在图像形成装置中,设置用于禁止订书机的操作的时间段,使得图像形成单元的功耗和订书机的功耗的总和等于或小于电源的电力 可以供应以便彼此并行地执行订书机的操作和图像形成单元的操作。