公开(公告)号：US20080094128A1

公开(公告)日：2008-04-24

申请号：US11792178

申请日：2005-11-18

申请人： Tomoyuki Ito ,  Isao Yamamoto

发明人： Tomoyuki Ito ,  Isao Yamamoto

IPC分类号： G05F1/10 ,  H02M3/155

CPC分类号： H02M3/07 ,  H05B33/0815 ,  Y02B20/346

摘要： In a driver circuit for a charge pump circuit capable of switching a step-up ratio, first and second oscillators oscillating at different frequencies are provided. The charge pump circuit is controlled by a control unit. The first oscillator outputs a first periodic signal required for the control unit to control the step-up action of the charge pump circuit. The second oscillator outputs a second periodic signal employed for a time measurement and having a frequency set lower than that of the first periodic signal. The control unit monitors the state of the driver circuit itself or the charge pump circuit and switches the step-up ratio of the charge pump circuit if a predetermined state continues for equal to or more than a predetermined period of time. The control unit turns on only the first oscillator when the step-up ratio of the charge pump circuit is lager than 1 to thereby perform the control of the step-up action and the time measurement based on the first periodic signal. On the other hand, when the step-up ratio is 1, the control unit turns on only the second oscillator and performs the time measurement based on the second periodic signal.

摘要翻译： 在能够切换升压比的电荷泵电路的驱动电路中，提供以不同频率振荡的第一和第二振荡器。 电荷泵电路由控制单元控制。 第一振荡器输出控制单元所需的第一周期信号以控制电荷泵电路的升压动作。 第二振荡器输出用于时间测量并具有低于第一周期信号的频率的第二周期信号。 如果预定状态持续等于或大于预定时间段，则控制单元监视驱动器电路本身或电荷泵电路的状态，并切换电荷泵电路的升压比。 当电荷泵电路的升压比大于1时，控制单元仅接通第一振荡器，由此执行基于第一周期信号的升压动作和时间测量的控制。 另一方面，当升压比为1时，控制单元仅接通第二振荡器，并且基于第二周期信号执行时间测量。

公开(公告)号：US20080048737A1

公开(公告)日：2008-02-28

申请号：US11791772

申请日：2005-10-26

申请人： Tomoyuki Ito ,  Isao Yamamoto

发明人： Tomoyuki Ito ,  Isao Yamamoto

IPC分类号： H02M3/155 ,  G05F1/00 ,  G05F1/577 ,  H03L5/00 ,  H03K3/015 ,  G06F3/038

CPC分类号： H05B33/0851

摘要： A voltage generating circuit includes a voltage generating unit which generates plural constant voltages, plural switches, a control signal generating unit and a decoding circuit. The switches select any one of the plural constant voltages generated from the voltage generating unit and outputs it from a voltage output terminal. The control signal generating unit generates plural control signals which are switched between a high level and a low level through trimming on plural fuse resistors. The decoding circuit controls the state of connection of the switches-according to the control signals. The reference voltage Vx output from the voltage output terminal is applied to an electric-current generating resistor through an operational amplifier and a transistor to generate a constant electric current.

摘要翻译： 电压产生电路包括产生多个恒定电压的电压产生单元，多个开关，控制信号产生单元和解码电路。 开关选择从电压产生单元产生的多个恒定电压中的任何一个，并从电压输出端子输出。 控制信号生成单元通过对多个熔丝电阻进行修整来生成在高电平和低电平之间切换的多个控制信号。 解码电路根据控制信号控制开关的连接状态。 从电压输出端子输出的参考电压Vx通过运算放大器和晶体管施加到电流产生电阻器，以产生恒定的电流。

公开(公告)号：US07081742B2

公开(公告)日：2006-07-25

申请号：US11151920

申请日：2005-06-14

申请人： Tomoyuki Ito ,  Isao Yamamoto ,  Hiroyuki Iwaki

发明人： Tomoyuki Ito ,  Isao Yamamoto ,  Hiroyuki Iwaki

IPC分类号： G05F1/56

CPC分类号： G05F1/575

摘要： A series regulator for outputting a regulated voltage and a booster circuit of a charge pump type for outputting an output voltage by boosting the regulated voltage are connected in series. The series regulator is controlled so that the output voltage is maintained constant. A main circuit current of the series regulator is subject to current limitation. An excess signal commensurate of an excess of a current indicator value over a current reference value is generated. A voltage control signal is reduced in level in accordance with the excess signal.

摘要翻译： 用于输出调节电压的串联调节器和用于通过升高调节电压输出输出电压的电荷泵类型的升压电路串联连接。 控制串联稳压器，使输出电压保持恒定。 串联稳压器的主电路电流受电流限制。 产生与当前参考值相当的超过当前指标值的过量信号。 电压控制信号根据过量信号降低电平。

公开(公告)号：US20050202851A1

公开(公告)日：2005-09-15

申请号：US11068103

申请日：2005-02-28

申请人： Isao Yamamoto ,  Tomoyuki Ito ,  Hiroyuki Iwaki

发明人： Isao Yamamoto ,  Tomoyuki Ito ,  Hiroyuki Iwaki

IPC分类号： H01L31/036 ,  H01L33/00 ,  H03K3/00 ,  H04B1/38 ,  H04M1/00

CPC分类号： H05B33/0866 ,  H04M1/22 ,  H05B33/0818 ,  H05B33/0857 ,  Y02B20/346

摘要： A drive control circuit sends out pulse signals of various pulse signals so as to control the light emission amount and luminance of LEDs by gradually increasing and decreasing the pulse width in predetermined cycles during predetermined periods based on parameters supplied from an LED drive controller that determine a first emission control processing period, a second emission control processing period, first to fourth slope periods and the like. The tone of an emitted color realized by a plurality of LEDs is controlled by synchronizing the periods of time of light emission control processings.

摘要翻译： 驱动控制电路发出各种脉冲信号的脉冲信号，以便根据从LED驱动控制器提供的参数来逐步增加和减少预定周期内的脉冲宽度来控制LED的发光量和亮度， 第一发光控制处理期间，第二发光控制处理期间，第一至第四斜坡期间等。 通过使发光控制处理的时间段同步来控制由多个LED实现的发射色调的色调。

公开(公告)号：US20090200962A1

公开(公告)日：2009-08-13

申请号：US12402229

申请日：2009-03-11

申请人： Isao Yamamoto ,  Tomoyuki Ito

发明人： Isao Yamamoto ,  Tomoyuki Ito

IPC分类号： H05B41/36 ,  G05F1/40

CPC分类号： H02M3/07 ,  H05B33/0815

摘要： In a power supply apparatus for performing constant current driving of a light emitting diode which is a load circuit, a constant current circuit is disposed on a path for driving the load circuit. A charge pump circuit which is a voltage generating circuit outputs a driving voltage to the light emitting diode. A monitoring circuit monitors the voltage across the two ends of the constant current circuit. This monitoring circuit includes a voltage source which generates a threshold voltage that follows the fluctuation of the voltage at which the constant current circuit can operate stably, compares the voltage across the two ends of the constant current circuit and the threshold voltage generated by the voltage source, and outputs a comparison result Vs to a control unit. The control unit controls the charge pump circuit on the basis of the output of the monitoring circuit.

摘要翻译： 在作为负载电路的发光二极管进行恒流驱动的电源装置中，在用于驱动负载电路的路径上设置恒流电路。 作为电压产生电路的电荷泵电路向发光二极管输出驱动电压。 监控电路监测恒流电路两端的电压。 该监视电路包括电压源，其产生跟随恒定电流电路稳定工作的电压波动的阈值电压，比较恒流电路两端的电压和由电压源产生的阈值电压 ，并将比较结果Vs输出到控制单元。 控制单元根据监控电路的输出控制电荷泵电路。

公开(公告)号：US07483021B2

公开(公告)日：2009-01-27

申请号：US11068103

申请日：2005-02-28

申请人： Isao Yamamoto ,  Tomoyuki Ito ,  Hiroyuki Iwaki

发明人： Isao Yamamoto ,  Tomoyuki Ito ,  Hiroyuki Iwaki

IPC分类号： G09G3/36

CPC分类号： H05B33/0866 ,  H04M1/22 ,  H05B33/0818 ,  H05B33/0857 ,  Y02B20/346

摘要： A drive control circuit sends out pulse signals of various pulse signals so as to control the light emission amount and luminance of LEDs by gradually increasing and decreasing the pulse width in predetermined cycles during predetermined periods based on parameters supplied from an LED drive controller that determine a first emission control processing period, a second emission control processing period, first to fourth slope periods and the like. The tone of an emitted color realized by a plurality of LEDs is controlled by synchronizing the periods of time of light emission control processings.

摘要翻译： 驱动控制电路发出各种脉冲信号的脉冲信号，以便根据从LED驱动控制器提供的参数来逐步增加和减少预定周期内的脉冲宽度来控制LED的发光量和亮度， 第一发光控制处理期间，第二发光控制处理期间，第一至第四斜坡期间等。 通过使发光控制处理的时间段同步来控制由多个LED实现的发射色调的色调。

公开(公告)号：US07388560B2

公开(公告)日：2008-06-17

申请号：US10925562

申请日：2004-08-25

申请人： Isao Yamamoto ,  Tomoyuki Ito ,  Takahiro Ota

发明人： Isao Yamamoto ,  Tomoyuki Ito ,  Takahiro Ota

IPC分类号： G09G3/36

CPC分类号： G09G3/36 ,  G09G2330/02 ,  H02M3/07 ,  H02M3/156 ,  H02M2001/0045

摘要： An LCD panel module includes a common boosting converter, an LCD boosting circuit, an LDO control circuit, and constant current circuits for parallel-connected LED elements and series-connected LED elements. The LCD panel module is so configured that a type-switching unit can switch over between Type 1 in which the LED elements are connected in parallel and Type 2 in which the LED elements are connected in series. The common boosting converter preliminarily boosts a battery voltage supplied from a lithium ion battery to a low voltage or a high voltage and supplies the boosted voltage to the parallel-connected LED elements or series-connected LED elements respectively. The LCD boosting circuit boosts the low voltage and supplies it to an LCD panel, while the LDO control circuit steps down the high voltage and supplies it to the LCD panel.

摘要翻译： LCD面板模块包括公共升压转换器，LCD升压电路，LDO控制电路和用于并联LED元件和串联LED元件的恒流电路。 LCD面板模块被配置为使得类型切换单元可以在LED元件并联连接的类型1和LED元件串联连接的类型2之间切换。 公共升压转换器预先将从锂离子电池供给的电池电压升压到低电压或高电压，并将升压电压分别提供给并联LED元件或串联连接的LED元件。 LCD升压电路提升低电压并提供给LCD面板，而LDO控制电路降低高压并将其提供给LCD面板。

公开(公告)号：US07948299B2

公开(公告)日：2011-05-24

申请号：US12402229

申请日：2009-03-11

申请人： Isao Yamamoto ,  Tomoyuki Ito

发明人： Isao Yamamoto ,  Tomoyuki Ito

IPC分类号： G05F1/10

CPC分类号： H02M3/07 ,  H05B33/0815

摘要： In a power supply apparatus for performing constant current driving of a light emitting diode which is a load circuit, a constant current circuit is disposed on a path for driving the load circuit. A charge pump circuit which is a voltage generating circuit outputs a driving voltage to the light emitting diode. A monitoring circuit monitors the voltage across the two ends of the constant current circuit. This monitoring circuit includes a voltage source which generates a threshold voltage that follows the fluctuation of the voltage at which the constant current circuit can operate stably, compares the voltage across the two ends of the constant current circuit and the threshold voltage generated by the voltage source, and outputs a comparison result Vs to a control unit. The control unit controls the charge pump circuit on the basis of the output of the monitoring circuit.

摘要翻译： 在作为负载电路的发光二极管进行恒流驱动的电源装置中，在用于驱动负载电路的路径上设置恒流电路。 作为电压产生电路的电荷泵电路向发光二极管输出驱动电压。 监控电路监测恒流电路两端的电压。 该监视电路包括电压源，其产生跟随恒定电流电路稳定工作的电压波动的阈值电压，比较恒流电路两端的电压和由电压源产生的阈值电压 ，并将比较结果Vs输出到控制单元。 控制单元根据监控电路的输出控制电荷泵电路。

公开(公告)号：US20070296353A1

公开(公告)日：2007-12-27

申请号：US11792033

申请日：2005-10-26

申请人： Tomoyuki Ito ,  Isao Yamamoto

发明人： Tomoyuki Ito ,  Isao Yamamoto

IPC分类号： G05F1/00 ,  G06F1/16 ,  H05B39/04

CPC分类号： H05B33/0818 ,  G09G3/3413 ,  H02M3/156 ,  H05B33/0827

摘要： A control circuit may include a first feedback input terminal which receives the cathode terminal voltage of light-emitting elements from a current driving circuit as a feedback signal. Such an arrangement controls the ON/OFF state of a switching element such that the cathode terminal voltage approaches a predetermined voltage. A second feedback input terminal may be included to receive the anode terminal voltage of the light-emitting elements as a feedback signal. Such an arrangement controls the ON/OFF state of the switching element such that the anode terminal voltage does not exceed a predetermined threshold voltage. A feedback output terminal may be included of the current driving circuit which allows the cathode terminal voltage of the light-emitting elements to be input to a control circuit for the switching regulator as a feedback signal. The control circuit and the current driving circuit may be integrally provided in the form of separate semiconductor chips.

摘要翻译： 控制电路可以包括从电流驱动电路接收发光元件的阴极端子电压作为反馈信号的第一反馈输入端子。 这样的布置控制开关元件的导通/截止状态，使得阴极端子电压接近预定电压。 可以包括第二反馈输入端子以将发光元件的阳极端子电压作为反馈信号。 这种布置控制开关元件的ON / OFF状态，使得阳极端子电压不超过预定阈值电压。 可以将电流驱动电路的反馈输出端子包括在内，使得将发光元件的阴极端子电压作为反馈信号输入到开关稳压器的控制电路。 控制电路和电流驱动电路可以以单独的半导体芯片的形式一体地设置。

公开(公告)号：US20050258891A1

公开(公告)日：2005-11-24

申请号：US11131860

申请日：2005-05-18

申请人： Tomoyuki Ito ,  Isao Yamamoto

发明人： Tomoyuki Ito ,  Isao Yamamoto

IPC分类号： H02M1/32 ,  H02M3/07 ,  H02M7/00

CPC分类号： H02M1/32 ,  H02M3/07

摘要： A voltage comparator of a power supply apparatus detects overshoot by comparing an output voltage with a threshold voltage. The power supply apparatus is provided with three switches. Upon detection of overshoot, the boosting operation of a booster circuit is suspended and the first through third switches are turned on. While the boosting operation is being suspended, the second switch operates to lower the output voltage. Concurrently, the first and third switches operate to forcibly lower an input voltage to allow the output voltage, occurring after the boosting operation is resumed, to approach a preset voltage.

摘要翻译： 电源装置的电压比较器通过将输出电压与阈值电压进行比较来检测过冲。 电源装置设有三个开关。 当检测到过冲时，升压电路的升压操作被暂停，并且第一至第三开关导通。 当升压操作暂停时，第二开关操作以降低输出电压。 同时，第一和第三开关操作以强制降低输入电压，以允许在升压操作恢复之后发生的输出电压接近预置电压。