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公开(公告)号：US11363694B2
公开(公告)日：2022-06-14
申请号：US17387633
申请日：2021-07-28
申请人： Tsuyoshi Ueno , Yuuki Oka , Tetsuya Satoh , Seiya Abe
发明人： Tsuyoshi Ueno , Yuuki Oka , Tetsuya Satoh , Seiya Abe
IPC分类号： H05B45/30 , H05B45/37 , H05B45/325 , H05B45/375 , G09G3/00 , G09G3/32 , H05B45/14
摘要： A drive circuit 3 includes a power source 11; current control units 12-1 to 12-n configured to control the amount of currents supplied to a light emitting element in accordance with a pulse modulation signal; and a calculation unit 13 configured to change a duty ratio of a pulse modulation signal. The current control units 12-1 to 12-n include a first switching element 21 configured to be switched on/off in accordance with a pulse modulation signal; and a second switching element 22 configured to be switched on/off in accordance with an inversion signal of the pulse modulation signal input to the first switching element 21; and an inductor 23. The first switching element 21 and the inductor 23 are serially connected between the power source and the light emitting element. The second switching element 22 is connected between ground 25 and a contact point 24 of the first switching element 21 and the inductor 23. The two or more current control units 12-1 to 12-n are connected in parallel.
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公开(公告)号：US11109459B2
公开(公告)日：2021-08-31
申请号：US16612875
申请日：2018-05-23
申请人： Tsuyoshi Ueno , Yuuki Oka , Tetsuya Satoh , Seiya Abe
发明人： Tsuyoshi Ueno , Yuuki Oka , Tetsuya Satoh , Seiya Abe
IPC分类号： H05B45/30 , H05B45/325 , H05B45/375 , G09G3/00 , G09G3/32 , H05B45/14
摘要： A drive circuit 3 includes a power source 11; current control units 12-1 to 12-n configured to control the amount of currents supplied to a light emitting element in accordance with a pulse modulation signal; and a calculation unit 13 configured to change a duty ratio of a pulse modulation signal. The current control units 12-1 to 12-n include a first switching element 21 configured to be switched on/off in accordance with a pulse modulation signal; and a second switching element 22 configured to be switched on/off in accordance with an inversion signal of the pulse modulation signal input to the first switching element 21; and an inductor 23. The first switching element 21 and the inductor 23 are serially connected between the power source and the light emitting element. The second switching element 22 is connected between ground 25 and a contact point 24 of the first switching element 21 and the inductor 23. The two or more current control units 12-1 to 12-n are connected in parallel.
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公开(公告)号：US10530123B2
公开(公告)日：2020-01-07
申请号：US15918154
申请日：2018-03-12
申请人： Yuuki Oka , Tsuyoshi Ueno , Seiya Abe
发明人： Yuuki Oka , Tsuyoshi Ueno , Seiya Abe
摘要： A drive circuit is configured to supply a current to a light emitting element. The drive circuit includes a plurality of switching elements configured to switch between ON/OFF states with a modulation signal, a capacitor connected in parallel with the light emitting element, and a control module configured to control the switching elements so that a voltage of the capacitor does not become lower than a threshold.
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公开(公告)号：US09128449B2
公开(公告)日：2015-09-08
申请号：US14314112
申请日：2014-06-25
申请人： Masataka Akaishi , Tsuyoshi Ueno , Motokazu Hasegawa , Yuuki Oka
发明人： Masataka Akaishi , Tsuyoshi Ueno , Motokazu Hasegawa , Yuuki Oka
CPC分类号： G03G15/80 , G03G15/2014 , G03G15/2042 , G03G15/2053
摘要： A fixing device includes a heating body; first and second coils for induction heating that heat the heating body by an induction heating method; a first switching element connected to the first coil for induction heating; a second switching element connected to the second coil for induction heating; a driving signal transmission unit that sends a first drive signal to the first switching element and a second drive signal to the second switching element so that the first switching element and the second switching element operate at the same timing to apply a first input voltage to the first coil for induction heating and a second input voltage to the second coil for induction heating; and a voltage drop unit that steps down the first input voltage applied to the first coil for induction heating so that the first input voltage is lower than the second input voltage.
摘要翻译： 定影装置包括加热体; 用于通过感应加热方法加热加热体的感应加热用的第一和第二线圈; 连接到用于感应加热的第一线圈的第一开关元件; 连接到用于感应加热的第二线圈的第二开关元件; 驱动信号传输单元，其向第一开关元件发送第一驱动信号和向第二开关元件发送第二驱动信号，使得第一开关元件和第二开关元件在相同的定时工作，以将第一输入电压施加到 用于感应加热的第一线圈和用于感应加热的第二线圈的第二输入电压; 以及降压单元，其降低施加到第一线圈的感应加热的第一输入电压，使得第一输入电压低于第二输入电压。
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公开(公告)号：US11563304B2
公开(公告)日：2023-01-24
申请号：US17305606
申请日：2021-07-12
申请人： Yuuki Oka , Takumi Satoh , Tsuyoshi Ueno , Atsufumi Omori
发明人： Yuuki Oka , Takumi Satoh , Tsuyoshi Ueno , Atsufumi Omori
摘要： A lighting module includes a voltage-current controller to control power externally supplied, a capacitor charged with power supplied from the voltage-current controller, a laser light source to emit laser light driven by a current from the capacitor, first and second FETs electrically connected in series to the laser light source, and circuitry that controls a first voltage value applied to the first FET and a second voltage value applied to the second FET, to control a resistance value of the second FET. The first FET controls a pulse width of the current flowing through the laser light source in accordance with the first voltage value applied to a gate thereof. The second FET changes in resistance value in accordance with the second voltage value applied to a gate thereof and controls, with the resistance value, a peak value of the current flowing through the laser light source.
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公开(公告)号：US20220037853A1
公开(公告)日：2022-02-03
申请号：US17305606
申请日：2021-07-12
申请人： Yuuki Oka , Takumi Satoh , Tsuyoshi Ueno , Atsufumi Omori
发明人： Yuuki Oka , Takumi Satoh , Tsuyoshi Ueno , Atsufumi Omori
摘要： A lighting module includes a voltage-current controller to control power externally supplied, a capacitor charged with power supplied from the voltage-current controller, a laser light source to emit laser light driven by a current from the capacitor, first and second FETs electrically connected in series to the laser light source, and circuitry that controls a first voltage value applied to the first FET and a second voltage value applied to the second FET, to control a resistance value of the second FET. The first FET controls a pulse width of the current flowing through the laser light source in accordance with the first voltage value applied to a gate thereof. The second FET changes in resistance value in accordance with the second voltage value applied to a gate thereof and controls, with the resistance value, a peak value of the current flowing through the laser light source.
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公开(公告)号：US20200178361A1
公开(公告)日：2020-06-04
申请号：US16687816
申请日：2019-11-19
申请人： Yuuki Oka
发明人： Yuuki Oka
摘要： A drive circuit includes a plurality of capacitors; a plurality of first interrupters configured to select paths through which electric charges are supplied to the plurality of capacitors; and a plurality of second interrupters configured to select paths through which the plurality of capacitors supply electric charges to a plurality of light emitting elements. In a case where the first interrupters are controlled and an electric charge is stored in a capacitor corresponding to one light emitting element included in the plurality of light emitting elements to selectively turn on the one light emitting element, at least while an electric charge is supplied to a light emitting element to be turned on, one second interrupter coupled to a path through which an electric charge is supplied to a light emitting element not to be turned on interrupts the path.
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公开(公告)号：US09964904B2
公开(公告)日：2018-05-08
申请号：US14226110
申请日：2014-03-26
申请人： Yuuki Oka , Yukari Isoe , Motokazu Hasegawa
发明人： Yuuki Oka , Yukari Isoe , Motokazu Hasegawa
IPC分类号： G03G15/20
CPC分类号： G03G15/2053
摘要： A fixing device includes a fixing member, which includes heat-generating layer, and an induction heater to inductively heat the fixing member. The induction heater includes an excitation coil disposed facing an outer circumferential surface of the fixing member to generate a magnetic flux, a ferromagnetic core assembly containing a ferromagnetic core to form a magnetic path to direct the magnetic flux generated by the excitation coil to the fixing member, and a holder to hold the excitation coil and the ferromagnetic core assembly. The ferromagnetic core is insert-molded in and covered by the holder. The holder has a plurality of spherical marks created by a plurality of stabilizing members each having a spherical tip to stabilize the ferromagnetic core in a mold.
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