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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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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：US07919925B2
公开(公告)日：2011-04-05
申请号：US12167532
申请日：2008-07-03
申请人： Masayasu Ito , Takanori Namba
发明人： Masayasu Ito , Takanori Namba
CPC分类号： H05B33/0887 , H05B33/0815 , H05B33/0827
摘要： In a process in which a control signal having a low level is output from an ON/OFF control circuit to series regulators connected to LEDs serving as lighting targets to turn ON the LEDs in accordance with digital communication information, the ON/OFF control circuit calculates a specified current value to be supplied to the LEDs serving as the lighting targets and compares the specified current value with a detected current value which is detected by a current detecting circuit, and outputs a stop signal to a control circuit on the assumption that a current flows without the series regulators with grounding generated on a cathode side of any of LEDs when the detected current value is greater than the specified current value. When the control circuit turns OFF an NMOS transistor in response to the stop signal, an operation of a switching regulator is stopped.
摘要翻译： 在具有低电平的控制信号从ON / OFF控制电路输出到连接到用作照明目标的LED的串联调节器以根据数字通信信息接通LED的过程中，ON / OFF控制电路计算 指定的电流值被提供给用作点亮目标的LED，并将指定的电流值与由电流检测电路检测到的检测电流值进行比较，并且在假定电流检测电路 当检测到的电流值大于指定的电流值时，没有串联调节器流过在任何LED的阴极侧产生的接地。 当控制电路响应于停止信号使NMOS晶体管断开时，停止开关调节器的操作。
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公开(公告)号：US20090009088A1
公开(公告)日：2009-01-08
申请号：US12167532
申请日：2008-07-03
申请人： Masayasu Ito , Takanori Namba
发明人： Masayasu Ito , Takanori Namba
CPC分类号： H05B33/0887 , H05B33/0815 , H05B33/0827
摘要： In a process in which a control signal having a low level is output from an ON/OFF control circuit to series regulators connected to LEDs serving as lighting targets to turn ON the LEDs in accordance with digital communication information, the ON/OFF control circuit calculates a specified current value to be supplied to the LEDs serving as the lighting targets and compares the specified current value with a detected current value which is detected by a current detecting circuit, and outputs a stop signal to a control circuit on the assumption that a current flows without the series regulators with grounding generated on a cathode side of any of LEDs when the detected current value is greater than the specified current value. When the control circuit turns OFF an NMOS transistor in response to the stop signal, an operation of a switching regulator is stopped.
摘要翻译： 在具有低电平的控制信号从ON / OFF控制电路输出到连接到用作照明目标的LED的串联调节器以根据数字通信信息接通LED的过程中，ON / OFF控制电路计算 指定的电流值被提供给用作点亮目标的LED，并将指定的电流值与由电流检测电路检测到的检测电流值进行比较，并且在假定电流检测电路 当检测到的电流值大于指定的电流值时，没有串联调节器流过在任何LED的阴极侧产生的接地。 当控制电路响应于停止信号使NMOS晶体管断开时，停止开关调节器的操作。
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公开(公告)号：US20080157678A1
公开(公告)日：2008-07-03
申请号：US11962726
申请日：2007-12-21
申请人： Masayasu Ito , Yoshihiro Uchiyama , Takanori Namba
发明人： Masayasu Ito , Yoshihiro Uchiyama , Takanori Namba
IPC分类号： B60Q1/00
CPC分类号： H05B33/08
摘要： A light emitting device drive circuit includes: a power conversion unit for receiving an input electric power and performing an electric power conversion on the input electric power in accordance with a control signal so as to generate the predetermined output current; a current detection unit for detecting an output current IL of the power conversion unit; a temperature detection unit for detecting a case internal temperature TD, which is an interior temperature of a case for accommodating the light emitting device drive circuit; a regulation unit being operable to a) detect whether a temperature TL of the light emitting device has reached a first predetermined temperature TLmax based on TD, IL, and a temperature rise coefficient a relative to IL, the temperature rise coefficient a being set in advance so that TL satisfies a relationship of TL=TD+α·IL, and b) generate a regulation signal for reducing a predetermined output current IL0 so that TL does not exceed TLmax in the event that a result of the detection indicates that TL has reached TLmax; and a control unit for controlling IL0 in accordance with the regulation signal from the regulation unit.
摘要翻译： 发光器件驱动电路包括：电力转换单元，用于接收输入电力，并根据控制信号对输入电力进行电力转换，以产生预定的输出电流; 电流检测单元，用于检测电力转换单元的输出电流IL; 温度检测单元，用于检测作为用于容纳发光装置驱动电路的壳体的内部温度的壳体内部温度TD; 调节单元，其可操作以：a）检测所述发光装置的温度TL是否已经基于TD，IL达到第一预定温度TLmax，以及相对于IL的升温系数a，预先设定所述升温系数a 使得TL满足TL = TD + alpha.IL的关系，并且b）产生用于减小预定输出电流IL0的调节信号，使得在检测结果指示TL达到的情况下，TL不超过TLmax TLmax; 以及控制单元，用于根据来自调节单元的调节信号来控制IL0。
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公开(公告)号：US07291989B2
公开(公告)日：2007-11-06
申请号：US11296050
申请日：2005-12-06
申请人： Takanori Namba , Masayasu Ito
发明人： Takanori Namba , Masayasu Ito
IPC分类号： H05B37/02
CPC分类号： H05B33/0887 , H05B33/0815 , Y02B20/341
摘要： This disclosure relates to protecting a switching regulator by sensing immediately a change in an input voltage when the input voltage of the switching regulator is changed suddenly. When an input voltage of a switching regulator 12 is changed suddenly and an interrupt request signal IRQ is provided from an input voltage sensing circuit 16 while electromagnetic energy accumulated in the switching regulator 12 is discharged to an output block 14 by turning ON/OFF a switch SW1 in accordance with a switching signal generated by a microcomputer 18, to control a lighting of an LED1, the microcomputer 18 reduces an ON duty of the switching signal provided to the switch SW1 in response to the interrupt request signal IRQ and limits an increase of a peak value of a current flowing through a primary side of the switching regulator 12.
摘要翻译： 本公开涉及当开关调节器的输入电压突然改变时，立即感测到输入电压的变化来保护开关调节器。 当开关调节器12的输入电压突然改变并且从输入电压检测电路16提供中断请求信号IRQ时，同时开关调节器12中累积的电磁能量通过接通/断开来将开关放电到输出块14 SW 1根据由微计算机18产生的切换信号，为了控制LED1的点亮，微型计算机18响应于中断请求信号IRQ和限制而降低提供给开关SW 1的开关信号的导通占空比 流过开关调节器12的初级侧的电流的峰值的增加。
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