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公开(公告)号：US20170160669A1
公开(公告)日：2017-06-08
申请号：US15369694
申请日：2016-12-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
IPC: G03G15/00
CPC classification number: G03G15/065 , G03G15/55
Abstract: An exposure device irradiates a light beam to the photoconductor drum and thereby forms an electrostatic latent image on a photoconductor drum. A developing roller causes toner to adhere to the electrostatic latent image and thereby develops a toner image. A development bias power supply circuit applies a development bias to the developing roller. A direct current detection circuit detects a direct current that flows between the development bias power supply circuit and the developing roller. A control circuit (a) causes the exposure device to form an electrostatic latent image of an adjustment patch for toner density adjustment, (b) measures a value of the direct current at a timing when the developing roller causes the toner to adhere to the electrostatic latent image of the adjustment patch, and (c) performs the toner density adjustment on the basis of the measured value of the direct current.
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2.发明申请公开(公告)号：US20150378281A1
公开(公告)日：2015-12-31
申请号：US14748299
申请日：2015-06-24
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
IPC: G03G15/09
CPC classification number: G03G15/0907 , G03G15/065
Abstract: An image forming apparatus includes an alternating transformer that splits an alternating voltage into a first alternating voltage and a second alternating voltage, a developer bias application unit, an alternating voltage shutoff unit, and a discharge starting voltage measurement unit. The developer bias application unit applies a pulsed sleeve roller voltage composed of a first alternating voltage superimposed on a first direct voltage to a sleeve roller and also applies a second alternating voltage and a second direct voltage separately to a magnetic roller in order to apply a pulsed magnetic roller voltage composed of the second alternating voltage superimposed on the second direct voltage. The alternating voltage shutoff unit stops applying the second alternating voltage to the magnetic roller. The discharge starting voltage measurement unit increases the alternating voltage of the alternating transformer to measure the discharge starting voltage between the sleeve roller and magnetic roller.
Abstract translation: 图像形成装置包括将交流电压分为第一交流电压和第二交流电压的交流变压器，显影剂偏压施加单元，交流电压截止单元和放电启动电压测量单元。 显影剂偏压施加单元将叠加在第一直流电压上的第一交流电压组成的脉冲套筒辊电压施加到套筒辊上，并将第二交流电压和第二直流电压分别施加到磁性辊上以便施加脉冲 磁辊电压由第二交流电压组成，叠加在第二直流电压上。 交流电压关闭单元停止向磁辊施加第二交流电压。 放电启动电压测量单元增加交变变压器的交流电压，以测量套筒辊和磁辊之间的放电起始电压。
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公开(公告)号：US09766279B2
公开(公告)日：2017-09-19
申请号：US14788265
申请日：2015-06-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
CPC classification number: G01R29/26 , G01R15/12 , G01R15/144 , G01R35/00 , G03G15/5004 , G03G15/80 , G03G21/00
Abstract: Provided is an electronic apparatus that can prevent erroneous detection of a sensor output due to an AC line noise. A power supply circuit includes a noise filter, input rectifying smoothing circuit, converter circuit, and output smoothing circuit. The input rectifying smoothing circuit rectifies an input AC voltage passed through the noise filter to a pulsating flow and then smooth it. The converter circuit converts a DC voltage rectified and smoothed into a desired output voltage. The output smoothing circuit smoothes the convert output voltage to supply it to a control part. The noise determination part detects a noise that could not have been removed by the noise filter, as an AC line noise. The control part invalidates a detection signal outputted from the sensor for a previously set invalid period from the moment the AC line noise has been detected.
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公开(公告)号：US10437190B2
公开(公告)日：2019-10-08
申请号：US15986611
申请日：2018-05-22
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
Abstract: An AC measuring circuit measures a magnitude of an alternating current flowing through a bias applying circuit synchronized with a cycle of an AC voltage in a developing bias voltage. A control unit changes a level of the AC voltage in the developing bias voltage, and executes a developing bias adjustment process for setting a level of the AC voltage based on the level of the AC voltage when the leakage current detecting circuit detects the direct current. The control unit, when a measurement by the AC measuring circuit during execution of a developing process exceeds a predetermined allowable value, executes a warning process to prompt execution of the developing bias adjustment process, or the control unit executes the developing bias adjustment process to update the level of the AC voltage.
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5.发明授权Developing device, image forming apparatus, and method for controlling developing device 有权显影装置，成像装置和控制显影装置的方法公开(公告)号：US09037019B2
公开(公告)日：2015-05-19
申请号：US13852495
申请日：2013-03-28
Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
Inventor： Kensuke Fujihara
CPC classification number: G03G15/065 , G03G15/0907
Abstract: A developing device includes a developing roller, a magnetic roller, a capacitor, a transformer, and a control signal generating unit. The developing roller carries toner. The magnetic roller performs supply of toner to the developing roller and removal of toner from the developing roller. The transformer includes a primary side to which a capacitor is connected and a secondary side from which an AC voltage is output and applied to the developing roller. The control signal generating unit inputs a control signal to the capacitor and adjusts a DC bias value of the control signal so that a DC component of the control signal is the same before and after the change of the duty ratio of the control signal.
Abstract translation: 显影装置包括显影辊，磁辊，电容器，变压器和控制信号产生单元。 显影辊承载调色剂。 磁性辊对显影辊进行调色剂供应，并从显影辊中除去调色剂。 变压器包括电容器连接的初级侧和输出AC电压并施加到显影辊的次级侧。 控制信号生成单元向电容器输入控制信号，并调整控制信号的DC偏置值，使得控制信号的DC分量在控制信号的占空比变化前后相同。
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Patent Agency Ranking
6.发明授权Developing device, image forming apparatus, and method for controlling developing device 有权显影装置，成像装置和控制显影装置的方法公开(公告)号：US08953963B2
公开(公告)日：2015-02-10
申请号：US13743514
申请日：2013-01-17
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tatsuya Nakagawa , Tadahiro Kiyosumi , Kensuke Fujihara
CPC classification number: G03G15/0907 , G03G15/065
Abstract: A developing device includes a developing roller, a magnetic roller, a capacitor, a transformer, and a switching portion. The magnetic roller supplies toner to the developing roller or takes off the toner from the same. The capacitor is connected to a primary of the transformer, and the developing roller is connected to a secondary of the same. During a period while the voltage between electrodes of the capacitor is changing, the switching portion changes the duty ratio in a predetermined second time slot in which current flowing in the switching portion is smaller than that flowing in a first time slot.
Abstract translation: 显影装置包括显影辊，磁辊，电容器，变压器和开关部分。 磁性辊将调色剂供给显影辊，或从其中取出调色剂。 电容器连接到变压器的初级，显影辊连接到变压器的次级。 在电容器的电极之间的电压变化的期间，切换部分在开关部分中流动的电流小于在第一时隙中流动的电流的预定的第二时隙中改变占空比。
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7.发明授权Developing device, image forming apparatus and method of controlling developing device 有权显影装置，图像形成装置和控制显影装置的方法公开(公告)号：US08873980B2
公开(公告)日：2014-10-28
申请号：US13711799
申请日：2012-12-12
Applicant: Kyocera Document Solutions Inc.
Inventor： Kensuke Fujihara , Akihiro Watanabe , Nobuyuki Fuchimoto
CPC classification number: G03G15/0907 , G03G15/065
Abstract: A developing device includes a development roller, a magnetic roller, a transformer, a switching portion, output control portion and a capacitor. The development roller is opposite a photoconductor drum. The magnetic roller performs, with a magnetic brush, the supply of a toner to the development roller and the removal of the toner. The transformer generates an alternating-current voltage applied to the development roller. The switching portion passes and interrupts a current to the transformer. The output control portion stepwise changes, when a duty ratio in switching is changed, the duty ratio a plurality of times from a first duty ratio to a second duty ratio. The capacitor has one end connected to the transformer and the other end connected to the switching portion.
Abstract translation: 显影装置包括显影辊，磁辊，变压器，开关部分，输出控制部分和电容器。 显影辊与感光鼓相对。 磁辊通过磁刷将调色剂供应到显影辊并除去调色剂。 变压器产生施加到显影辊的交流电压。 开关部分通过并中断到变压器的电流。 当开关占空比改变时，输出控制部分逐次改变从第一占空比到第二占空比的多次的占空比。 电容器的一端连接到变压器，另一端连接到开关部分。
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公开(公告)号：US10241437B2
公开(公告)日：2019-03-26
申请号：US15369694
申请日：2016-12-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
Abstract: An exposure device irradiates a light beam to the photoconductor drum and thereby forms an electrostatic latent image on a photoconductor drum. A developing roller causes toner to adhere to the electrostatic latent image and thereby develops a toner image. A development bias power supply circuit applies a development bias to the developing roller. A direct current detection circuit detects a direct current that flows between the development bias power supply circuit and the developing roller. A control circuit (a) causes the exposure device to form an electrostatic latent image of an adjustment patch for toner density adjustment, (b) measures a value of the direct current at a timing when the developing roller causes the toner to adhere to the electrostatic latent image of the adjustment patch, and (c) performs the toner density adjustment on the basis of the measured value of the direct current.
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公开(公告)号：US20170160668A1
公开(公告)日：2017-06-08
申请号：US15367166
申请日：2016-12-01
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
CPC classification number: G03G15/065 , G03G15/0266
Abstract: A controller (a) increases a development bias when a surface potential of the photoconductor drum is 0 Volt, and determines a level of the development bias as a discharge voltage at a timing when discharge is detected between a photoconductor drum and a developing roller, (b) sets an alternating current component of the development bias so as to make a lowest level of the development bias equal to a level lower by the discharge voltage than a desired surface potential of the photoconductor drum, and (c) increases an applied voltage to a charging roller (that charges a surface of the photoconductor drum) when applying to the developing roller the development bias of which the alternating current component has been set, and determines as an applied voltage to the charging roller corresponding to the desired surface potential, the applied voltage at a timing when the discharge is detected.
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10.发明授权公开(公告)号：US09335665B2
公开(公告)日：2016-05-10
申请号：US14748299
申请日：2015-06-24
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kensuke Fujihara
CPC classification number: G03G15/0907 , G03G15/065
Abstract: An image forming apparatus includes an alternating transformer that splits an alternating voltage into a first alternating voltage and a second alternating voltage, a developer bias application unit, an alternating voltage shutoff unit, and a discharge starting voltage measurement unit. The developer bias application unit applies a pulsed sleeve roller voltage composed of a first alternating voltage superimposed on a first direct voltage to a sleeve roller and also applies a second alternating voltage and a second direct voltage separately to a magnetic roller in order to apply a pulsed magnetic roller voltage composed of the second alternating voltage superimposed on the second direct voltage. The alternating voltage shutoff unit stops applying the second alternating voltage to the magnetic roller. The discharge starting voltage measurement unit increases the alternating voltage of the alternating transformer to measure the discharge starting voltage between the sleeve roller and magnetic roller.
Abstract translation: 图像形成装置包括将交流电压分为第一交流电压和第二交流电压的交流变压器，显影剂偏压施加单元，交流电压截止单元和放电启动电压测量单元。 显影剂偏压施加单元将叠加在第一直流电压上的第一交流电压组成的脉冲套筒辊电压施加到套筒辊上，并将第二交流电压和第二直流电压分别施加到磁性辊上以便施加脉冲 磁辊电压由第二交流电压组成，叠加在第二直流电压上。 交流电压关闭单元停止向磁辊施加第二交流电压。 放电启动电压测量单元增加交变变压器的交流电压，以测量套筒辊和磁辊之间的放电起始电压。
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