公开(公告)号：US20080197789A1

公开(公告)日：2008-08-21

申请号：US12025873

申请日：2008-02-05

申请人： Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

发明人： Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

IPC分类号： H05B37/02

CPC分类号： H05B33/0851 ,  H05B33/0815 ,  Y02B20/346

摘要： A light emitting device includes multiple light units each of which includes a semiconductor light source, and a current supply control means for controlling supply of current to the semiconductor light source. A control unit includes a control signal generation means for generating and providing a control signal. The light emitting device also includes switching means for controlling feeding from a DC power source to a corresponding one of the light units in response to the control signal. Each of the switching means is coupled to a corresponding one of the light units through a feed line.

摘要翻译： 发光器件包括多个光单元，每个单元包括半导体光源，以及电流供应控制装置，用于控制对半导体光源的电流供应。 控制单元包括用于产生和提供控制信号的控制信号产生装置。 发光装置还包括用于响应于控制信号控制从DC电源馈送到对应的一个光单元的开关装置。 每个切换装置通过馈送线耦合到相应的一个光单元。

公开(公告)号：US20070013321A1

公开(公告)日：2007-01-18

申请号：US11484989

申请日：2006-07-11

申请人： Masayasu Ito ,  Fuminori Shiotsu ,  Takanori Namba

发明人： Masayasu Ito ,  Fuminori Shiotsu ,  Takanori Namba

IPC分类号： H05B41/24

CPC分类号： H05B33/089 ,  H05B33/0815 ,  H05B33/0827 ,  Y02B20/341

摘要： When a forward direction voltage of any of several LEDs 14 to 20 is lowered, a drain voltage of an NMOS transistor 70 employed in any of series regulators 24 to 30 becomes higher than a defined voltage. A zener diode ZD1, which is connected to the LED where the abnormal condition occurs, becomes conductive. A voltage, which is increased from the defined voltage, is applied to a negative input terminal of a comparing amplifier 72, and an output voltage of the comparing amplifier 72 is lowered by this increased voltage portion so that a gate voltage of the NMOS transistor 70 is lowered. A current flowing through the NMOS transistor 70 is decreased. Even if an abnormal condition caused by a voltage drop occurs in any of the LEDs 14 to 20, then the LEDs 14 to 20 can be protected.

摘要翻译： 当几个LED 14至20中的任何一个的正向电压降低时，串联调节器24至30中任何一个中采用的NMOS晶体管70的漏极电压变得高于限定的电压。 与发生异常状态的LED连接的齐纳二极管ZD 1变为导通状态。 从定义的电压增加的电压被施加到比较放大器72的负输入端，并且比较放大器72的输出电压被该增加的电压部分降低，使得NMOS晶体管70的栅极电压 被降低 流过NMOS晶体管70的电流减小。 即使在发光二极管14〜20中发生由电压下降引起的异常情况，也可以保护LED14〜20。

公开(公告)号：US08947017B2

公开(公告)日：2015-02-03

申请号：US13644517

申请日：2012-10-04

申请人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

发明人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/089 ,  H05B33/0815

摘要： A circuit for lighting a semiconductor light source is provided. The circuit includes: a switching regulator including a switching element and configured to generate a drive current for the semiconductor light source using the switching element; and a control circuit configured to control on-off of the switching element such that the magnitude of the drive current comes close to a targeted value. The control circuit includes: a comparator configured to compare the magnitude of the drive current with the targeted value; an up/down counter configured to count a digital value in a counting-up direction or counting-down direction, based on a comparison result of the comparator; a digital-to-analog converter configured to convert the counted digital value into an analog signal; and a drive circuit configured to control on/off of the switching element based on the analog signal.

摘要翻译： 提供一种照明半导体光源的电路。 该电路包括：开关调节器，包括开关元件，并且被配置为使用开关元件产生用于半导体光源的驱动电流; 以及控制电路，被配置为控制所述开关元件的导通截止，使得所述驱动电流的大小接近目标值。 控制电路包括：比较器，被配置为将驱动电流的大小与目标值进行比较; 配置为基于比较器的比较结果对计数向上或倒数方向的数字值进行计数的上/下计数器; 配置为将所计数的数字值转换为模拟信号的数模转换器; 以及驱动电路，被配置为基于所述模拟信号来控制所述开关元件的开/关。

公开(公告)号：US08928244B2

公开(公告)日：2015-01-06

申请号：US13467229

申请日：2012-05-09

申请人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

发明人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0851

摘要： A semiconductor light source lighting circuit includes a switching regulator that produces a drive current ILED with a switching element, and a control circuit that controls turning on and off of the switching element so that the magnitude of the drive current ILED approaches a target value. The control circuit includes an error comparator that compares the drive current ILED and the target value, an up/down counter that performs a counting operation, in which the control digital value is incremented or decremented based on the result of the comparison, a D/A converter that converts the control digital value into an analog duty ratio setting signal S4, and a drive circuit that controls the turning on and off of the switching element based on the signal S4. The up/down counter stops the counting operation when the switching regulator is brought into the inactive state.

摘要翻译： 半导体光源点亮电路包括：开关调节器，其利用开关元件产生驱动电流ILED;以及控制电路，其控制开关元件的导通和截止，使得驱动电流ILED的大小接近目标值。 控制电路包括：比较驱动电流ILED和目标值的误差比较器，执行计数操作的上/下计数器，其中控制数字值根据比较结果递增或递减，D / A转换器，其将控制数字值转换为模拟占空比设置信号S4，以及驱动电路，其根据信号S4控制开关元件的导通和截止。 当开关调节器处于非活动状态时，上/下计数器停止计数操作。

公开(公告)号：US20130088172A1

公开(公告)日：2013-04-11

申请号：US13644517

申请日：2012-10-04

申请人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

发明人： Satoshi Kikuchi ,  Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

IPC分类号： H05B37/02

CPC分类号： H05B33/089 ,  H05B33/0815

摘要： A circuit for lighting a semiconductor light source is provided. The circuit includes: a switching regulator including a switching element and configured to generate a drive current for the semiconductor light source using the switching element; and a control circuit configured to control on-off of the switching element such that the magnitude of the drive current comes close to a targeted value. The control circuit includes: a comparator configured to compare the magnitude of the drive current with the targeted value; an up/down counter configured to count a digital value in a counting-up direction or counting-down direction, based on a comparison result of the comparator; a digital-to-analog converter configured to convert the counted digital value into an analog signal; and a drive circuit configured to control on/off of the switching element based on the analog signal.

摘要翻译： 提供一种照明半导体光源的电路。 该电路包括：开关调节器，包括开关元件，并且被配置为使用开关元件产生用于半导体光源的驱动电流; 以及控制电路，被配置为控制所述开关元件的导通截止，使得所述驱动电流的大小接近目标值。 控制电路包括：比较器，被配置为将驱动电流的大小与目标值进行比较; 配置为基于比较器的比较结果对计数向上或倒数方向的数字值进行计数的上/下计数器; 配置为将所计数的数字值转换为模拟信号的数模转换器; 以及驱动电路，被配置为基于所述模拟信号来控制所述开关元件的开/关。

公开(公告)号：US07902773B2

公开(公告)日：2011-03-08

申请号：US12025873

申请日：2008-02-05

申请人： Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

发明人： Fuminori Shiotsu ,  Takanori Namba ,  Masayasu Ito

IPC分类号： H05B39/04

CPC分类号： H05B33/0851 ,  H05B33/0815 ,  Y02B20/346

摘要： A light emitting device includes multiple light units each of which includes a semiconductor light source, and a current supply control means for controlling supply of current to the semiconductor light source. A control unit includes a control signal generation means for generating and providing a control signal. The light emitting device also includes switching means for controlling feeding from a DC power source to a corresponding one of the light units in response to the control signal. Each of the switching means is coupled to a corresponding one of the light units through a feed line.

摘要翻译： 发光器件包括多个光单元，每个单元包括半导体光源，以及电流供应控制装置，用于控制对半导体光源的电流供应。 控制单元包括用于产生和提供控制信号的控制信号产生装置。 发光装置还包括用于响应于控制信号控制从DC电源馈送到对应的一个光单元的开关装置。 每个切换装置通过馈送线耦合到相应的一个光单元。

公开(公告)号：US07482765B2

公开(公告)日：2009-01-27

申请号：US11484989

申请日：2006-07-11

申请人： Masayasu Ito ,  Fuminori Shiotsu ,  Takanori Namba

发明人： Masayasu Ito ,  Fuminori Shiotsu ,  Takanori Namba

IPC分类号： H05B37/00

CPC分类号： H05B33/089 ,  H05B33/0815 ,  H05B33/0827 ,  Y02B20/341

摘要： When a forward direction voltage of any of several LEDs 14 to 20 is lowered, a drain voltage of an NMOS transistor 70 employed in any of series regulators 24 to 30 becomes higher than a defined voltage. A zener diode ZD1, which is connected to the LED where the abnormal condition occurs, becomes conductive. A voltage, which is increased from the defined voltage, is applied to a negative input terminal of a comparing amplifier 72, and an output voltage of the comparing amplifier 72 is lowered by this increased voltage portion so that a gate voltage of the NMOS transistor 70 is lowered. A current flowing through the NMOS transistor 70 is decreased. Even if an abnormal condition caused by a voltage drop occurs in any of the LEDs 14 to 20, then the LEDs 14 to 20 can be protected.

摘要翻译： 当几个LED 14至20中的任何一个的正向电压降低时，串联调节器24至30中任何一个中采用的NMOS晶体管70的漏极电压变得高于限定的电压。 与发生异常状态的LED连接的齐纳二极管ZD1变为导通状态。 从定义的电压增加的电压被施加到比较放大器72的负输入端，并且比较放大器72的输出电压被该增加的电压部分降低，使得NMOS晶体管70的栅极电压 被降低 流过NMOS晶体管70的电流减小。 即使在发光二极管14〜20中发生由电压下降引起的异常情况，也可以保护LED14〜20。

公开(公告)号：US08207675B2

公开(公告)日：2012-06-26

申请号：US12329825

申请日：2008-12-08

申请人： Masayasu Ito ,  Fuminori Shiotsu

发明人： Masayasu Ito ,  Fuminori Shiotsu

IPC分类号： B60Q1/14

CPC分类号： F21V29/67 ,  B60Q1/0088 ,  F21S41/143 ,  F21S45/43 ,  F21V29/61 ,  F21W2102/00 ,  G05D23/1931 ,  G05D23/1951 ,  H05B33/0803 ,  H05B33/0815 ,  H05B33/0845

摘要： A vehicle lamp includes: N semiconductor light sources, wherein N is an integer of 1 or more; M fans configured to cool the N semiconductor light sources, wherein M is an integer of 1 or more; N current supply units configured to supply first current to the N semiconductor light sources, respectively; and a control unit configured to receive electric power supplied from an electric power source and supply second current to the N current supply units. The control unit includes: N switch elements that correspond to the N semiconductor light sources; M switch elements that correspond to the M fans; and a control circuit configured to control fan drive current supplied to the fans through the switch elements and the second current. The fans are coupled to the control unit.

摘要翻译： 车灯包括：N个半导体光源，其中N是1或更大的整数; M个风扇，其被配置为冷却所述N个半导体光源，其中M为1以上的整数; N个电流供给单元，被配置为分别向N个半导体光源提供第一电流; 以及控制单元，被配置为接收从电源提供的电力并将第二电流提供给所述N个电流供应单元。 控制单元包括：对应于N个半导体光源的N个开关元件; M开关元件对应于M个风扇; 以及控制电路，被配置为通过开关元件和第二电流来控制提供给风扇的风扇驱动电流。 风扇耦合到控制单元。

公开(公告)号：US20090129111A1

公开(公告)日：2009-05-21

申请号：US12269909

申请日：2008-11-13

申请人： Masayasu Ito ,  Fuminori Shiotsu

发明人： Masayasu Ito ,  Fuminori Shiotsu

IPC分类号： B60Q1/04 ,  G05D23/20

CPC分类号： F21V29/67 ,  F21S41/143 ,  F21S43/14 ,  F21S45/43 ,  F21Y2115/10 ,  Y10T307/445

摘要： A vehicular lamp is arranged to save power by not driving a cooling fan when an LED is unlit. The vehicular lamp is capable of reducing cost and stopping a supply of current to the LED even in the case of open wiring in a supply of current to the cooling fan. The vehicular lamp includes LEDs connected in series, a cooling fan connected in series with the LEDs and arranged to cool the LEDs. A current supply circuit receives power supplied from a power source and supplies current to the LEDs and the cooling fan.

摘要翻译： 一种车灯配置为在LED熄灭时不驱动冷却风扇来节省电力。 即使在向冷却风扇供应电流的情况下，车辆灯也能够降低成本并停止向LED供应电流。 车灯包括串联的LED，与LED串联连接的冷却风扇，并且布置成冷却LED。 电流供给电路接收从电源供给的电力，向LED和冷却风扇供给电流。

公开(公告)号：US20070019443A1

公开(公告)日：2007-01-25

申请号：US11490560

申请日：2006-07-21

申请人： Masayasu Ito ,  Fuminori Shiotsu

发明人： Masayasu Ito ,  Fuminori Shiotsu

IPC分类号： H02M3/335

CPC分类号： H02M3/33561 ,  H05B33/0815 ,  Y02B20/346

摘要： To control individually a plurality of loads to be turned on by combining a switching regulator with a charge pump circuit using some of the components of the switching regulator. An LED is controlled to be turned on by a switching regulator having an NMOS transistor connected to a transformer and a control circuit for generating an on/off signal. An LED is controlled to be turned on by a charge pump circuit that shares the NMOS transistor and the control circuit with the switching regulator to charge a condenser with an electric charge during an operation for turning on the NMOS transistor and discharge the electric charge accumulated in the condenser during an operation for turning off the NMOS transistor. Thus, circuit structure is simplified.

摘要翻译： 通过使用开关调节器的一些部件组合开关调节器和电荷泵电路来单独控制要接通的多个负载。 LED被控制为由具有连接到变压器的NMOS晶体管的开关调节器和用于产生开/关信号的控制电路接通。 通过在用于接通NMOS晶体管的操作期间，共享NMOS晶体管和控制电路的开关调节器来控制LED被接通，所述控制电路与开关调节器对于具有电荷的电容器进行充电，并且将累积的电荷放电 在关闭NMOS晶体管的操作期间的电容器。 因此，电路结构简化。