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公开(公告)号：US20180287499A1
公开(公告)日：2018-10-04
申请号：US15903419
申请日：2018-02-23
Applicant: Konica Minolta Inc.
Inventor： Yuhei TATSUMOTO , Masayuki WATANABE , Makoto SHIMAZOE , Akihiro HAYASHI
CPC classification number: H02M3/1584 , H02M3/33507 , H02M7/1557 , H02M2001/0035 , H02M2001/0045 , H02M2003/1566 , Y02B70/16
Abstract: A power supply device includes: a power supply circuit that converts an AC voltage into a DC voltage; and a control circuit that controls the power supply circuit, wherein the power supply circuit includes: a rectifying and smoothing circuit that rectifies and smoothes the AC voltage; a first voltage converting circuit that converts the voltage and outputs a first DC voltage; a second voltage converting circuit that switches the first DC voltage by a switching circuit to output a second DC voltage; a feedback circuit that detects and feeds back an output voltage of the first voltage converting circuit; and a selection circuit that switches a reference voltage of the feedback circuit, and the control circuit sets the switching circuit to be in a continuous connection state when a normal mode is shifted to a power saving mode and gradually switches the reference voltage.
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公开(公告)号：US20170123368A1
公开(公告)日：2017-05-04
申请号：US15297663
申请日：2016-10-19
Applicant: Konica Minolta, Inc.
Inventor： Masayuki WATANABE , Yuhei TATSUMOTO , Akihiro HAYASHI , Makoto SHIMAZOE
CPC classification number: G03G15/80 , G03G2215/0132 , H02M3/335 , H02M3/337 , H02M3/338 , H04N1/00888 , H04N1/00904
Abstract: A power supply device including: a transformer generating, from an input voltage, low output voltage and high output voltage; an upper limiter circuit receiving the high output voltage and controlling the high output voltage not to exceed a maximum; a power controller performing feedback control on the input voltage so that the low output voltage matches a target voltage; an operation mode acquirer configured to acquire an operation mode of an image forming device; and a target value controller configured to change the target voltage depending upon the acquired operation mode. The target voltage when consumption amount of current with the high output voltage is relatively great ensures that the high output voltage does not fall below a minimum of a rated voltage range of the high output voltage, and is higher than the target voltage when consumption amount of current with the high output voltage is relatively small.
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公开(公告)号：US20200023637A1
公开(公告)日：2020-01-23
申请号：US16502889
申请日：2019-07-03
Applicant: Konica Minolta, Inc.
Inventor： Yasuhiro ISHIHARA , Yuhei TATSUMOTO , Toshikazu HIGASHI , Makoto SHIMAZOE
Abstract: A heater includes: a planar heat generator; a power supply circuit that controls supply of power to the planar heat generator; a plurality of temperature sensors that is provided on the planar heat generator and measures a temperature; and a hardware processor that controls the power supply circuit in a predetermined condition to maintain a temperature measured by at least one of the plurality of temperature sensors at a target value, wherein the planar heat generator includes: an insulator; and a heat generator disposed on the insulator, the heat generator includes each of a plurality of linear parts extending in parallel with each other at a predetermined interval P, and each of the plurality of temperature sensors is disposed along a direction orthogonal to an extending direction of each of the plurality of linear parts at a position mutually shifted by a predetermined distance D.
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公开(公告)号：US20190227471A1
公开(公告)日：2019-07-25
申请号：US16243774
申请日：2019-01-09
Applicant: KONICA MINOLTA, INC.
Inventor： Akihiro HAYASHI , Yuhei TATSUMOTO , Koji OHARA , Makoto SHIMAZOE , Yasuhiro KOIDE
IPC: G03G15/00
Abstract: An image forming device includes: a conductive roller that abuts the image carrier to rotate; a power supply circuit that applies voltage to the roller; a controller that controls the power supply circuit so as to apply the voltage to the roller over a predetermined detection period in a state in which the image carrier and the roller are rotated; a detection value acquirer that acquires a detection value acquired by the application of the voltage indicating a state of the image carrier in the detection period; and a state detector that detects a state of the image carrier on the basis of a plurality of acquired detection values, wherein a length of the detection period is set to a length at which both the numbers of rotations of the image carrier and the roller from a start of the detection period are integers.
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Patent Agency Ranking
公开(公告)号：US20210356891A1
公开(公告)日：2021-11-18
申请号：US17315877
申请日：2021-05-10
Applicant: KONICA MINOLTA, INC.
Inventor： Yasuhiro KOIDE , Yoshihito SASAMOTO , Makoto SHIMAZOE , Yuhei TATSUMOTO
IPC: G03G15/00
Abstract: An image forming device includes: a transfer unit transferring a toner image to a sheet; a resistance measurement member disposed on the upstream side in a sheet carriage direction of the transfer unit and for measuring resistance of the sheet; a charge elimination member disposed between the transfer unit and the resistance measurement member in the sheet carriage direction; a first voltage applying unit applying voltage for resistance measurement to the resistance measurement member; and a second voltage applying unit applying voltage of reverse bias of the voltage for resistance measurement to the charge elimination member. The width of a charge elimination region by the charge elimination member is wider than that of a charged region by the resistance measurement member in a direction perpendicular to the sheet carriage direction. The absolute value of the voltage for charge elimination is smaller than that of the voltage for resistance measurement.
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公开(公告)号：US20160139531A1
公开(公告)日：2016-05-19
申请号：US14932434
申请日：2015-11-04
Applicant: Konica Minolta, Inc.
Inventor： Makoto SHIMAZOE , Akihiro HAYASHI , Hiroyuki YOSHIKAWA , Toshikazu HIGASHI
IPC: G03G15/02
CPC classification number: G03G15/0266 , G03G15/0136 , G03G15/80
Abstract: An image forming apparatus includes: a plurality of image forming units forming an image in the corresponding color by electrophotographic system; a high-voltage power supply circuit capable of generating a bias voltage; and a control unit that controls a first printing mode and a second printing mode, wherein in the second printing mode, the control unit performs such control that the photosensitive bodies provided on the image forming units not used in the second printing mode continuously rotate at a speed lower than a speed in the first printing mode, and/or such control that a bias voltage whose absolute value is less than an absolute value of a bias voltage in the first printing mode is supplied from the high-voltage power supply circuit to the processing components of the same type provided on the image forming units not used in the second printing mode.
Abstract translation: 图像形成装置包括：多个图像形成单元，通过电子照相系统形成相应颜色的图像; 能够产生偏置电压的高压电源电路; 以及控制单元，其控制第一打印模式和第二打印模式，其中在所述第二打印模式中，所述控制单元执行这样的控制，使得设置在不在第二打印模式中使用的图像形成单元上的感光体在 速度低于第一打印模式中的速度，和/或这样的控制：将绝对值小于第一打印模式中的偏置电压的绝对值的偏置电压从高压电源电路提供给 处理在第二打印模式中未使用的图像形成单元上提供的相同类型的处理部件。
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7.发明公开公开(公告)号：US20230375968A1
公开(公告)日：2023-11-23
申请号：US18134262
申请日：2023-04-13
Applicant: KONICA MINOLTA, INC.
Inventor： Yuhei TATSUMOTO , Akimasa ISHIKAWA , Makoto SHIMAZOE , Yuta TACHIBANA , Kouei CHO
CPC classification number: G03G15/5029 , G06K15/4065
Abstract: Provided is an image forming system capable of accurately detecting the resistance of a recording material. The image forming system includes an application roller that applies a voltage to a recording material on a conveyance path, and a controller that calculates the electric resistance of the recording material from a relationship between the voltage applied to the application roller and a current. The controller calculates the resistance of the recording material based on first profile information that is acquired by changing the applied voltage and corresponds to a change in the resistance of the application roller, and second profile information that is acquired by changing the applied voltage in a state where the recording material is sandwiched and corresponds to the change in the resistance of the application roller.
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公开(公告)号：US20210026287A1
公开(公告)日：2021-01-28
申请号：US16930890
申请日：2020-07-16
Applicant: Konica Minolta, Inc.
Inventor： Makoto SHIMAZOE , Yoshihito SASAMOTO , Yasuhiro KOIDE , Yuhei TATSUMOTO
IPC: G03G15/00
Abstract: A power supply apparatus includes a predetermined mode in which power consumption is suppressed and a normal mode in which the power consumption is not suppressed and which supplies power to an apparatus. the power supply apparatus includes the following, a cutting member which cuts off supply of the power to a fixing heater; a noise removing member which is positioned in a later stage of the cutting member and which removes noise in the power; and a controller which controls the cutting member. The controller controls the cutting member to cut off supply of the power to the noise removing member in the predetermined mode.
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公开(公告)号：US20200031114A1
公开(公告)日：2020-01-30
申请号：US16502961
申请日：2019-07-03
Applicant: Konica Minolta, Inc.
Inventor： Yasuhiro ISHIHARA , Yuhei TATSUMOTO , Toshikazu HIGASHI , Makoto SHIMAZOE
IPC: B41J2/045
Abstract: A heater includes: a planar heat generator; a power supply circuit that controls supply of power to the planar heat generator; a plurality of temperature sensors that is provided on the planar heat generator and measures a temperature; and a hardware processor that detects abnormality of the temperature sensor in a case where a difference in temperature measured by each of two of the temperature sensors out of the plurality of temperature sensors exceeds an abnormality threshold value after a predetermined waiting time has elapsed since the supply of power to the planar heat generator is stopped.
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