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公开(公告)号：US10263525B2
公开(公告)日：2019-04-16
申请号：US15903419
申请日：2018-02-23
Applicant: Konica Minolta Inc.
Inventor： Yuhei Tatsumoto , Masayuki Watanabe , Makoto Shimazoe , Akihiro Hayashi
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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Patent Agency Ranking
公开(公告)号：US20180275592A1
公开(公告)日：2018-09-27
申请号：US15890991
申请日：2018-02-07
Applicant: KONICA MINOLTA, INC.
Inventor： Makoto Shimazoe , Masayuki Watanabe , Yuhei Tatsumoto , Akihiro Hayashi
CPC classification number: G03G15/80 , H01F38/00 , H02M7/06 , H02M2001/009
Abstract: A power supply apparatus includes: a first primary winding; a first AC voltage outputter connected to one side of the first primary winding so as to output a first AC voltage; a second AC voltage outputter connected to the other side of the first primary winding and capable of outputting a second AC voltage with an inverted phase of the first AC voltage; a first secondary winding that generates a third AC voltage by mutual induction of the first primary winding to which the first AC voltage and the second AC voltage are applied; a second primary winding having one side receiving an input of the second AC voltage and the other side connected to a fixed voltage; and a second secondary winding that generates a fourth AC voltage by mutual induction of the second primary winding to which the second AC voltage is applied.
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公开(公告)号：US10007224B2
公开(公告)日：2018-06-26
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：US09377731B1
公开(公告)日：2016-06-28
申请号：US14972973
申请日：2015-12-17
Applicant: Konica Minolta, Inc.
Inventor： Masayuki Watanabe , Hiroshi Yamaguchi , Hitoshi Asano , Daichi Suzuki
IPC: G03G15/20
CPC classification number: G03G15/205 , G03G15/2042
Abstract: An image forming apparatus includes: a fixing unit configured to include at least a first and second radiation heaters capable of heating printing medium; a power supply unit configured to supply power to the first and second radiation heaters; and a controller configured to select either one of the first and second radiation heaters and control to light or turn off the selected radiation heater, wherein a heating width of the printing medium of the second radiation heater is wider than that of the first radiation heater, and the controller determines whether to preheat the second radiation heater based on the number of times of lighting of the first and second radiation heaters and controls to light and turn off the second radiation heater when the controller has determined that it is necessary to preheat the second radiation heater.
Abstract translation: 图像形成装置包括：固定单元，被配置为至少包括能够加热打印介质的第一和第二辐射加热器; 电源单元，被配置为向所述第一和第二辐射加热器供电; 以及控制器，被配置为选择第一和第二辐射加热器中的任一个并控制以点亮或关闭所选择的辐射加热器，其中第二辐射加热器的打印介质的加热宽度比第一辐射加热器的加热宽度宽， 并且所述控制器基于所述第一和第二辐射加热器的点亮次数来确定是否预热所述第二辐射加热器，并且当所述控制器确定需要预热所述第二辐射加热器时，控制所述第二辐射加热器并点亮所述第二辐射加热器，并且关闭所述第二辐射加热器 辐射加热器。
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公开(公告)号：US11838469B2
公开(公告)日：2023-12-05
申请号：US17862763
申请日：2022-07-12
Applicant: Konica Minolta, Inc.
Inventor： Hidenori Mine , Masayuki Watanabe , Harumitsu Fujimori , Takanobu Shiki
IPC: H04N1/00
CPC classification number: H04N1/00806 , H04N1/00588 , H04N1/00673
Abstract: An image forming system includes: an image forming device that is disposed at a first conveyance path and forms an image on a recording medium that is a continuous sheet or a long sheet; a first conveyor that conveys the recording medium on the first conveyance path in a conveyance direction; an image reader that reads the image formed on the recording medium at a second conveyance path on a downstream side of the first conveyance path in the conveyance direction; a second conveyor that conveys the recording medium on the second conveyance path; and a controller that controls a speed of a drive source of the first conveyor and controls a torque of a drive source of the second conveyor.
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16.发明申请公开(公告)号：US20190286022A1
公开(公告)日：2019-09-19
申请号：US16276321
申请日：2019-02-14
Applicant: Konica Minolta, Inc.
Inventor： Masayuki Fukunaga , Toshiaki Tanaka , Masayuki Watanabe , Mineo Yamamoto
IPC: G03G15/20
Abstract: An image forming apparatus including: a fixer that fixes a toner image formed on a recording medium by pressing and heating the recording medium nipped in a nip portion formed by causing two rotating bodies to pressedly abut on each other, and conveying the recording medium by rotating the rotating bodies; a motor that drives the rotating bodies by transmitting a torque to at least one of the rotating bodies; a torque detector that detects the torque transmitted to the rotating body by the motor; a temperature detector that detects temperature of the rotating body; a speed detector that detects a conveyance speed for conveying the recording medium by the fixer; and a controller that corrects the detected torque based on at least any one of the detected temperature and the detected conveyance speed and predicts a life of the fixer based on the corrected torque.
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