公开(公告)号：US20120146531A1

公开(公告)日：2012-06-14

申请号：US13315348

申请日：2011-12-09

申请人： Daisuke UCHIMOTO ,  Naoki INOUE

发明人： Daisuke UCHIMOTO ,  Naoki INOUE

IPC分类号： H05B37/02

CPC分类号： H05B33/0818 ,  H05B33/0827

摘要： The present disclosure provides a driving circuit of a light emitting element including a switching power source for supplying a driving voltage to a first terminal of the light emitting element to be driven and a current driver connected to a second terminal of the light emitting element for supplying a driving current to the light emitting element while a burst dimming pulse is being asserted.

摘要翻译： 本公开提供了一种发光元件的驱动电路，该发光元件包括用于向要驱动的发光元件的第一端子提供驱动电压的开关电源和连接到发光元件的第二端子的电流驱动器，用于供给 当脉冲调制脉冲被断言时到达发光元件的驱动电流。

公开(公告)号：US20080122291A1

公开(公告)日：2008-05-29

申请号：US11665876

申请日：2005-09-08

申请人： Daisuke Uchimoto ,  Hiroaki Ando ,  Manabu Oyama

发明人： Daisuke Uchimoto ,  Hiroaki Ando ,  Manabu Oyama

IPC分类号： H02J1/00 ,  G05F1/10 ,  H02M3/155 ,  G05F1/44

CPC分类号： H02M3/1584 ,  H02M2001/0032 ,  H02M2001/009 ,  Y02B70/16 ,  Y10T307/406

摘要： A control signal Vcont is input to a control terminal, thereby switching between a normal operation mode and a light-load mode. In the normal mode, a control unit turns on/off first switch through fourth switch, and outputs boosted voltages from a first output terminal and a second output terminal. When the light-load mode is selected, the control unit stops the switching of the second switch and fourth switch. In this case, current flows in first and second output capacitors via first and second diodes, respectively, and boosting operation is performed.

摘要翻译： 控制信号Vcont被输入到控制端子，从而在正常操作模式和轻负载模式之间切换。 在正常模式中，控制单元通过第四开关接通/断开第一开关，并从第一输出端子和第二输出端子输出升压电压。 当选择轻负载模式时，控制单元停止第二开关和第四开关的切换。 在这种情况下，电流分别通过第一和第二二极管流入第一和第二输出电容器，并进行升压操作。

公开(公告)号：US20080088179A1

公开(公告)日：2008-04-17

申请号：US11664963

申请日：2005-10-14

申请人： Manabu Oyama ,  Hiroaki Ando ,  Daisuke Uchimoto

发明人： Manabu Oyama ,  Hiroaki Ando ,  Daisuke Uchimoto

IPC分类号： H02J1/00

CPC分类号： H02M3/07 ,  H02M2003/071 ,  H02M2003/077 ,  Y10T307/383 ,  Y10T307/675

摘要： In a switching power supply apparatus, an input voltage Vin applied to an input terminal is output from a first output terminal and a second output terminal after boosting or inverting of the voltage Vin. When a first and a fourth switches are turned on, a flying capacitor is charged. When a second and a fifth switches are turned on, charges charged in the flying capacitor are transferred to a first output capacitor. When a third and a fifth switches are turned on, charges charged in the flying capacitor are transferred to a second output capacitor. A voltage Vin×2 double the input voltage Vin is output from the first output terminal as a first output voltage Vout1, and a voltage −Vin obtained by inverting the input voltage is output from the second output terminal as a second output voltage.

摘要翻译： 在开关电源装置中，在升压或反相电压Vin之后，从第一输出端子和第二输出端子输出施加到输入端子的输入电压Vin。 当第一和第四开关接通时，对飞行电容器进行充电。 当第二和第五开关接通时，在飞行电容器中充电的电荷被传送到第一输出电容器。 当第三和第五开关接通时，在飞行电容器中充电的电荷被传送到第二输出电容器。 作为第一输出电压Vout 1，从第一输出端子输出输入电压Vin的两倍的电压Vinx2，作为第二输出电压，从第二输出端子输出通过反相输入电压获得的电压-Vin。

公开(公告)号：US08598800B2

公开(公告)日：2013-12-03

申请号：US13089741

申请日：2011-04-19

申请人： Daisuke Uchimoto ,  Hiroki Kikuchi ,  Naoki Inoue

发明人： Daisuke Uchimoto ,  Hiroki Kikuchi ,  Naoki Inoue

IPC分类号： H05B41/36 ,  G05F1/00 ,  G05F1/10

CPC分类号： H02M1/36 ,  H02M3/156 ,  H05B33/0815 ,  Y02B20/347

摘要： A soft-start circuit generates a soft-start voltage Vss having a voltage level that rises over time. A pulse width modulator generates a PWM signal having a duty ratio adjusted such that a feedback voltage Vout′ that corresponds to the output voltage Vout of the switching power supply matches the soft-start voltage Vss. A driver circuit controls a switching element according to the PWM signal. A capacitor is arranged such that one terminal thereof is set to a fixed electric potential. A current source generates a charge current that flows intermittently in synchronization with the PWM signal so as to charge the capacitor. The soft-start circuit outputs, as the soft-start voltage Vss, a voltage that occurs at the capacitor.

摘要翻译： 软启动电路产生具有随时间上升的电压电平的软启动电压Vss。 脉冲宽度调制器产生PWM信号，该PWM信号的占空比被调整为使得与开关电源的输出电压Vout相对应的反馈电压Vout'与软启动电压Vss匹配。 驱动电路根据PWM信号控制开关元件。 电容器被布置成使得其一个端子被设置为固定电位。 电流源产生与PWM信号同步地间歇流动的充电电流，以对电容器充电。 软启动电路作为软启动电压Vss输出在电容器处发生的电压。

公开(公告)号：US20090121781A1

公开(公告)日：2009-05-14

申请号：US12269953

申请日：2008-11-13

申请人： Manabu OYAMA ,  Daisuke UCHIMOTO

发明人： Manabu OYAMA ,  Daisuke UCHIMOTO

IPC分类号： G05F1/10

CPC分类号： H02M3/07 ,  H02M1/36

摘要： A charge pump circuit includes a first switch to a fourth switch, a flying capacitor, and an output capacitor. A driver turns on the first switch and the fourth switch during a predetermined precharge period from the start of activation of the charge pump circuit to charge the output capacitor. Thereafter, on the basis of a pulse signal, the driver alternately turns on and off a first pair and a second pair.

摘要翻译： 电荷泵电路包括到第四开关的第一开关，飞行电容器和输出电容器。 在从电荷泵电路的启动开始的预定预充电期间，驱动器接通第一开关和第四开关，以对输出电容器充电。 此后，基于脉冲信号，驾驶员交替地打开和关闭第一对和第二对。

公开(公告)号：US20090027022A1

公开(公告)日：2009-01-29

申请号：US12181008

申请日：2008-07-28

申请人： Manabu OYAMA ,  Daisuke Uchimoto

发明人： Manabu OYAMA ,  Daisuke Uchimoto

IPC分类号： G05F1/56

CPC分类号： H02M3/07

摘要： A first switch group includes switches provided on a path for charging a flying capacitor using an input voltage. A second switch group includes switches provided on a path for charging an output capacitor using charge stored in the flying capacitor. A pulse modulator generates a pulse signal having a duty ratio adjusted so that a feedback voltage corresponding to an output voltage of a charge pump circuit matches a given reference voltage. A driver receives the pulse signal from the pulse modulator, and turns on either one of the first switch group and the second switch group during a period corresponding to a high-time of the pulse signal and turns on the other switch group during a period corresponding to a low-time thereof.

摘要翻译： 第一开关组包括用于使用输入电压对飞跨电容器充电的路径上提供的开关。 第二开关组包括设置在用于对存储在飞行电容器中的电荷充电输出电容器的路径上的开关。 脉冲调制器产生具有调整的占空比的脉冲信号，使得与电荷泵电路的输出电压相对应的反馈电压与给定的参考电压相匹配。 驱动器接收来自脉冲调制器的脉冲信号，并且在与脉冲信号的高电平相对应的时间段期间接通第一开关组和第二开关组中的任一个，并且在相应的时间段期间导通另一个开关组 到一个低时间。

公开(公告)号：US07403049B2

公开(公告)日：2008-07-22

申请号：US11513545

申请日：2006-08-31

申请人： Daisuke Uchimoto ,  Manabu Oyama

发明人： Daisuke Uchimoto ,  Manabu Oyama

IPC分类号： H03K4/06

CPC分类号： H03K4/06

摘要： A first constant-current source supplies a charging current to a second terminal of a first capacitor in which a first terminal is grounded. A first terminal of a second capacitor is grounded, and a first switch is provided between the second terminal of the first capacitor and a second terminal of the second capacitor. A second constant-current source supplies current to the second capacitor, and a second switch is provided on a current path of the second constant-current source. A third constant-current source draws out current from the first capacitor and the second capacitor. A switch controller turns on the first switch and turns off the second switch when an output voltage appearing in the second terminal of the first capacitor reaches a predetermined upper-limit voltage. The switch controller turns off the first switch and turns on the second switch when the output voltage drops to a predetermined lower-limit voltage.

摘要翻译： 第一恒流源将充电电流提供给第一电容器的第二端子，其中第一端子接地。 第二电容器的第一端子接地，并且第一开关设置在第一电容器的第二端子和第二电容器的第二端子之间。 第二恒流源向第二电容器提供电流，并且在第二恒定电流源的电流路径上提供第二开关。 第三恒流源从第一电容器和第二电容器抽出电流。 当第一电容器的第二端子中出现的输出电压达到预定的上限电压时，开关控制器接通第一开关并关闭第二开关。 当输出电压下降到预定的下限电压时，开关控制器关闭第一开关并接通第二开关。

公开(公告)号：US08569975B2

公开(公告)日：2013-10-29

申请号：US13089694

申请日：2011-04-19

申请人： Daisuke Uchimoto ,  Naoki Inoue ,  Yoju Imamura

发明人： Daisuke Uchimoto ,  Naoki Inoue ,  Yoju Imamura

IPC分类号： H05B37/02 ,  H05B41/36

CPC分类号： H02M3/156 ,  G09G3/3406 ,  G09G2320/064 ,  H05B33/0818 ,  H05B33/0824 ,  Y02B20/346

摘要： A control IC controls a switching power supply configured to supply a driving voltage Vout to one terminal of an LED string which is driven in an intermittent manner. A sample-and-hold circuit performs sampling of a detection voltage Vs that corresponds to a driving voltage Vout in the on period, and holds the sampled detection voltage Vs in the off period. In the off period, a pulse modulator generates a pulse signal having a duty ratio adjusted such that a hold detection voltage VsH output from the sample-and-hold circuit matches the detection voltage Vs. A driver drives a switching transistor according to the pulse signal.

摘要翻译： 控制IC控制开关电源，其被配置为将驱动电压Vout提供给以间歇方式驱动的LED串的一个端子。 采样保持电路对导通期间的驱动电压Vout进行检测电压Vs的采样，并将采样检测电压Vs保持在断开期间。 在关闭期间，脉冲调制器产生脉冲信号，该脉冲信号的调整占空比使得从采样保持电路输出的保持检测电压VsH与检测电压Vs匹配。 驱动器根据脉冲信号驱动开关晶体管。

公开(公告)号：US20120120342A1

公开(公告)日：2012-05-17

申请号：US13090605

申请日：2011-04-20

申请人： Daisuke UCHIMOTO ,  Hiroki KIKUCHI

发明人： Daisuke UCHIMOTO ,  Hiroki KIKUCHI

IPC分类号： G02F1/13357 ,  H05B37/02

CPC分类号： H05B33/0815 ,  G09G3/3406 ,  G09G2320/064 ,  G09G2330/028 ,  H02M3/156 ,  H02M2001/009 ,  H05B33/0827 ,  Y02B20/346

摘要： A control IC controls a switching power supply configured to supply a driving voltage Vout to one terminal of an LED string to be intermittently driven. In the on period of the LED string, a pulse modulator generates a pulse signal having a duty ratio adjusted such that a detection voltage VLED that corresponds to the output voltage Vout of the switching power supply matches a predetermined reference voltage Vref. A driver drives a switching transistor included in the switching power supply according to the pulse signal. After transition from the on period to the off period, the pulse modulator reduces the duty ratio of the pulse signal over time.

摘要翻译： 控制IC控制被配置为向间歇驱动的LED串的一个端子提供驱动电压Vout的开关电源。 在LED串的接通期间，脉冲调制器生成占空比调整为使得与开关电源的输出电压Vout对应的检测电压VLED与规定的基准电压Vref匹配的脉冲信号。 驱动器根据脉冲信号驱动包括在开关电源中的开关晶体管。 在从开启周期到关闭周期的转变之后，脉冲调制器降低脉冲信号随时间的占空比。

公开(公告)号：US07737767B2

公开(公告)日：2010-06-15

申请号：US12270089

申请日：2008-11-13

申请人： Manabu Oyama ,  Daisuke Uchimoto

发明人： Manabu Oyama ,  Daisuke Uchimoto

IPC分类号： G05F1/10

CPC分类号： H02M3/07 ,  H03K3/0315 ,  H03K7/06 ,  H03K2005/00045

摘要： A pulse frequency modulator generates a pulse signal having a fixed duty ratio and a frequency which is adjusted such that a feedback voltage corresponding to the output voltage of a charge pump circuit is coincident with a predetermined first reference voltage. A driver, on receiving the pulse signal, turns on a first or second group of switches during the time periods corresponding to the high time periods of the pulse signal and turns on the other ones of the first and second group of switches during the time periods corresponding to the low time periods of the pulse signal.

摘要翻译： 脉冲频率调制器产生具有固定占空比和调整频率的脉冲信号，使得与电荷泵电路的输出电压相对应的反馈电压与预定的第一参考电压一致。 在接收到脉冲信号的驱动器在与脉冲信号的高时间周期相对应的时间段内接通第一组或第二组开关，并且在该时间段期间打开第一组和第二组开关中的另一组 对应于脉冲信号的低时间周期。