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公开(公告)号：US08947017B2
公开(公告)日：2015-02-03
申请号：US13644517
申请日：2012-10-04
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。
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公开(公告)号：US08928244B2
公开(公告)日：2015-01-06
申请号：US13467229
申请日：2012-05-09
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。
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公开(公告)号：US20130088172A1
公开(公告)日：2013-04-11
申请号：US13644517
申请日：2012-10-04
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。
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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。
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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。
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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。
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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。
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公开(公告)号：US20130278165A1
公开(公告)日：2013-10-24
申请号：US13856492
申请日：2013-04-04
申请人： Satoshi Kikuchi , Takanori Namba , Masayasu Ito
发明人： Satoshi Kikuchi , Takanori Namba , Masayasu Ito
IPC分类号： H05B33/08
CPC分类号： H05B33/0815 , H05B33/0848
摘要： A semiconductor light source lighting circuit is provided with: a switching regulator that generates a drive current of a semiconductor light source using a switching element; and a control circuit that controls ON/OFF of the switching element. The control circuit is provided with: a comparator that compares the drive current and a target value; a counter that counts a digital value in a count direction determined by a comparison result of the comparator; a digital-analog converter that converts the digital value into an analog signal; and a drive circuit that controls the ON/OFF of the switching element based on the analog signal. The counter counts the digital value at a speed determined by an ON/OFF cycle of the switching element.
摘要翻译： 半导体光源点亮电路设置有：使用开关元件产生半导体光源的驱动电流的开关调节器; 以及控制开关元件的ON / OFF的控制电路。 该控制电路具有：比较器，用于比较驱动电流和目标值; 计数器，其通过比较器的比较结果确定的计数方向对数字值进行计数; 数字模拟转换器，将数字值转换为模拟信号; 以及驱动电路，其基于模拟信号来控制开关元件的接通/断开。 计数器以由开关元件的ON / OFF周期确定的速度对数字值进行计数。
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公开(公告)号：US08970136B2
公开(公告)日：2015-03-03
申请号：US14197571
申请日：2014-03-05
CPC分类号： H05B33/0815 , B60Q1/00 , H05B33/0848 , Y02B20/346
摘要： A semiconductor light source lighting circuit includes a voltage step-down unit configured to generate a drive voltage lower than an input voltage by turning on or off a first switching element in a voltage step-down mode, a voltage step-up unit configured to generate the drive voltage higher than the input voltage by turning on or off a second switching element in a voltage step-up mode, and a controller. The controller includes a charge pump unit configured to repeat charging from the drive voltage to a second capacitor and discharging from the charged second capacitor to the first capacitor in the voltage step-up mode, and a switch drive unit configured to apply a voltage higher than the voltage at the other end of the first switching element to the control terminal of the first switching element by using a voltage of the charged first capacitor.
摘要翻译： 一种半导体光源照明电路，包括：降压单元，被配置为通过以降压模式接通或关闭第一开关元件来产生低于输入电压的驱动电压;电压升压单元，被配置为产生 通过以升压模式接通或关闭第二开关元件，驱动电压高于输入电压，以及控制器。 所述控制器包括：电荷泵单元，被配置为在所述升压模式下，从所述驱动电压向所述第二电容器重复充电并从所述充电的第二电容器向所述第一电容器放电;以及开关驱动单元，被配置为施加高于 通过使用充电的第一电容器的电压将第一开关元件的另一端的电压提供给第一开关元件的控制端子。
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公开(公告)号：US09226349B2
公开(公告)日：2015-12-29
申请号：US13856492
申请日：2013-04-04
申请人： Satoshi Kikuchi , Takanori Namba , Masayasu Ito
发明人： Satoshi Kikuchi , Takanori Namba , Masayasu Ito
CPC分类号： H05B33/0815 , H05B33/0848
摘要： A semiconductor light source lighting circuit is provided with: a switching regulator that generates a drive current of a semiconductor light source using a switching element; and a control circuit that controls ON/OFF of the switching element. The control circuit is provided with: a comparator that compares the drive current and a target value; a counter that counts a digital value in a count direction determined by a comparison result of the comparator; a digital-analog converter that converts the digital value into an analog signal; and a drive circuit that controls the ON/OFF of the switching element based on the analog signal. The counter counts the digital value at a speed determined by an ON/OFF cycle of the switching element.
摘要翻译： 半导体光源点亮电路设置有：使用开关元件产生半导体光源的驱动电流的开关调节器; 以及控制开关元件的ON / OFF的控制电路。 该控制电路具有：比较器，用于比较驱动电流和目标值; 计数器，其通过比较器的比较结果确定的计数方向对数字值进行计数; 数字模拟转换器，将数字值转换为模拟信号; 以及驱动电路，其基于模拟信号来控制开关元件的接通/断开。 计数器以由开关元件的ON / OFF周期确定的速度对数字值进行计数。
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