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公开(公告)号：US10133218B2
公开(公告)日：2018-11-20
申请号：US15793765
申请日：2017-10-25
Applicant: Konica Minolta, Inc.
Inventor： Junichi Masuda , Mikiyuki Aoki , Toru Kasamatsu , Masahiro Nonoyama , Akimasa Ishikawa
Abstract: A phase control device includes: at least one switching element connected to an AC power source, the switching element being capable of: turning on and off at specified timings; delivering AC power to a load upon turn-on and cutting it off upon turn-off; and keeping an on-time from the start to the end of turn-on and an off-time from the start to the end of turn-off, the on-time and off-time being variable; a timing setting portion that sets a turn-on and turn-off timing for turning on and off the switching element; a judgment portion that judges whether or not the turn-on and turn-off timing are on at a phase within a first or second phase range; and a processor that starts turning on and off the switching element at the turn-on and turn-off timing, the processor being capable of adjusting the on-time and off-time depending on the judgment result.
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公开(公告)号：US09645541B2
公开(公告)日：2017-05-09
申请号：US14619267
申请日：2015-02-11
Applicant: KONICA MINOLTA, INC.
Inventor： Kouei Cho , Toru Kasamatsu , Mikiyuki Aoki , Yohei Yamada
CPC classification number: G03G15/80 , G03G15/5004 , H02M3/33507 , H02M2001/009
Abstract: Image forming apparatus comprises an electric power supply circuit board, an electric power control unit, functional circuits, and an electrical power saving circuit. The electric power control unit executes constant voltage control, to make electrical potential of a remote sensing location constant. The functional circuits are connected with the electric power supply circuit board. The electrical power saving circuit switches the state of functional circuits between the state in which they are provided with electric power and the state in which they are not provided with electric power. The electrical power saving circuit sets the contact point of the input side of the circuit, in which the consumption electrical current or the behavior guarantee minimum electrical voltage is the largest, out of the electrical power saving circuit and functional circuits provided with electric power, as the remote sensing location.
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3.发明授权Electric power supply control device which can increase power converting efficiency 有权电力供应控制装置，可提高电力转换效率公开(公告)号：US09335710B2
公开(公告)日：2016-05-10
申请号：US14855219
申请日：2015-09-15
Applicant: KONICA MINOLTA, INC.
Inventor： Mikiyuki Aoki , Taku Kimura , Yohei Yamada , Morio Kinoshita , Toru Kasamatsu , Kouei Cho
CPC classification number: G03G15/80 , G03G2215/0132 , H02M1/36 , H02M3/156 , H02M3/24 , H02M3/33523 , H02M2001/0032 , H02M2001/0035 , H02M2001/0054 , H02M2001/007 , H02M2001/008 , Y02B70/1491 , Y02B70/16
Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.
Abstract translation: 电源控制装置包括第一转换器，至少一个第二转换器和电压控制单元。 第二转换器可工作在间歇振荡中，并转换为从第一转换器输出电压。 电压控制单元控制第一转换器的输出电压，使得输出电压等于或小于第二转换器的工作电压的上限的最小值，并且大于或等于a 第二转换器的工作电压的下限的最大值，以及第二转换器中的至少一个执行低电力行为。
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公开(公告)号：US09256188B2
公开(公告)日：2016-02-09
申请号：US14662865
申请日：2015-03-19
Applicant: Konica Minolta, Inc.
Inventor： Toru Kasamatsu , Mikiyuki Aoki , Yohei Yamada , Kouei Cho
CPC classification number: G03G15/80 , G03G15/065
Abstract: An image forming apparatus having image supporting members and developing devices provided for a plurality of colors respectively, and a developing bias source. The developing bias source includes DC power circuits provided for the colors respectively, an AC power circuit provided for use in common for all of the colors, and an element provided for at least one of the colors other than black. The developing bias source generates developing biases by superimposing an AC voltage output from the AC power circuit on DC voltages output from the DC power circuits and applies the developing biases to the respectively corresponding developing devices. The element maintains a constant voltage having a potential of an opposite polarity to a potential of charged toner used for the development. The developing bias source further superimposes the constant voltage on the developing bias for the at least one of the colors other than black.
Abstract translation: 具有分别设置有多种颜色的图像支持部件和显影装置的图像形成装置和显影偏压源。 显影偏压源包括分别为颜色提供的DC电源电路，为所有颜色共同使用而设置的AC电源电路，以及为黑色以外的至少一种颜色提供的元件。 显影偏压源通过将从AC电源电路输出的AC电压叠加在从DC电源电路输出的直流电压上产生显影偏压，并将显影偏压施加到相应的显影装置。 该元件保持具有与用于显影的带电调色剂的电位相反极性的电位的恒定电压。 显影偏压源进一步将恒定电压叠加在黑色以外的至少一种颜色的显影偏压上。
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公开(公告)号：US09927759B2
公开(公告)日：2018-03-27
申请号：US15441382
申请日：2017-02-24
Applicant: Konica Minolta, Inc.
Inventor： Toru Kasamatsu , Mikiyuki Aoki , Kouei Cho
CPC classification number: G03G15/80 , H02M1/08 , H02M1/4208 , H02M1/4225 , H02M3/33561 , H02M3/33592 , H02M2001/0032 , H02M2001/0048 , H02M2001/008 , H02M2001/009 , Y02B70/126 , Y02B70/1475 , Y02B70/1491 , Y02B70/16
Abstract: A first rectification circuit includes a bypass element connected to both ends of a rectification element. The bypass element is smaller in voltage drop amount than the rectification element. A power supply device is configured to perform switching between a first mode and a second mode based on at least one of information showing a magnitude of electric power that is being supplied to a load and information showing a magnitude of electric power that is to be supplied to the load. In the first mode, an AC voltage is rectified in a path including the rectification element. In the second mode, the AC voltage is rectified in a path including the bypass element.
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Patent Agency Ranking
公开(公告)号：US09703240B2
公开(公告)日：2017-07-11
申请号：US15227369
申请日：2016-08-03
Applicant: Konica Minolta, Inc.
Inventor： Seiichi Kirikubo , Mikiyuki Aoki , Akinori Kimata , Takeshi Tamada
IPC: G03G15/20
CPC classification number: G03G15/2039
Abstract: A fuser control device includes: a fusing portion having a heater; a chopper portion including a reactor, a free-wheeling element, and a switching element; and a processor portion being configured to implement a first current control during an implementation period, the implementation period including a first time interval and a second time interval, the implementation period being longer than a commercial power period, the first current control for transferring a control signal having a predetermined duty ratio to the switching element during the first time interval and transferring a control signal having a 100% duty ratio to the switching element during the second time interval.
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公开(公告)号：US10148167B2
公开(公告)日：2018-12-04
申请号：US15655986
申请日：2017-07-21
Applicant: KONICA MINOLTA, INC.
Inventor： Toru Kasamatsu , Mikiyuki Aoki , Kouei Cho
Abstract: A power supply device includes: a first transformer including a primary winding and a secondary winding; a first control circuit controlling a switching operation of a switch element, and cause the primary winding to generate a first AC voltage; an application circuit receiving a second AC voltage generated in the secondary winding by mutual induction with the primary winding, and apply an output voltage according to the second AC voltage to a load; a voltage detection circuit detecting a magnitude of a DC voltage obtained by rectifying the first AC voltage or the second AC voltage; and an output circuit outputting a stop signal indicating stop of the power supply device, when a result of comparison between the magnitude of the DC voltage and a threshold value set according to a magnitude of the load satisfies a predetermined condition, after reception of an instruction to stop voltage supply.
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公开(公告)号：US09823609B2
公开(公告)日：2017-11-21
申请号：US14869153
申请日：2015-09-29
Applicant: KONICA MINOLTA, INC.
Inventor： Takeshi Tamada , Mikiyuki Aoki , Seiichi Kirikubo , Akinori Kimata
CPC classification number: G03G15/5004 , G03G15/2039 , G03G15/205 , G03G15/80 , G03G2215/0132
Abstract: An image forming apparatus includes: a fixing part including a heater, and a first temperature detection part configured to detect the temperature of the heater; a chopper circuit including a reactor, a freewheeling element, and a switching element, the chopper circuit being configured to switch an input direct current on and off in a specified duty cycle by using the switching element and to supply the current to the heater; and a control part configured to control the duty cycle based on a detection result obtained by the first temperature detection part, as well as to control a switching frequency of the switching element based on an operation mode of the image forming apparatus.
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公开(公告)号：US10407263B2
公开(公告)日：2019-09-10
申请号：US15800400
申请日：2017-11-01
Applicant: KONICA MINOLTA, INC.
Inventor： Shun Sugai , Kazuhiko Kowase , Hideaki Komiyama , Mikiyuki Aoki
Abstract: A sheet conveying apparatus capable of conveying a sheet as a conveyance target in a conveyance path includes a detector that detects capacitance in a predetermined detection region in the conveyance path; and a basis weight identifier that identifies a basis weight of the sheet as the conveyance target on the basis of first capacitance detected by the detector while the sheet as the conveyance target does not pass through the detection region and second capacitance detected by the detector while the sheet as the conveyance target passes through the detection region.
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公开(公告)号：US20170271994A1
公开(公告)日：2017-09-21
申请号：US15456729
申请日：2017-03-13
Applicant: Konica Minolta, Inc.
Inventor： Kouei Cho , Mikiyuki Aoki , Toru Kasamatsu
IPC: H02M3/335
CPC classification number: H02M3/33523 , H02M3/33507 , H02M2001/0006
Abstract: A power supply device having a transformer and a control circuit for controlling a power input to the transformer in accordance with a set value of an output voltage is provided. The power supply device includes an auxiliary winding provided in the transformer and a control power supply circuit configured to rectify AC power produced in the auxiliary winding to output a control voltage for operating the control circuit. The control power supply circuit includes a smoothing capacitor which is connected between output terminals for the control voltage and is to be charged with power obtained by rectifying the AC power, and a charge thinning circuit configured to intermittently charge the smoothing capacitor so that a voltage value between both ends of the smoothing capacitor reaches a set value of the control voltage.
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