System and method for driving LED
    51.
    发明授权
    System and method for driving LED 有权
    LED驱动系统及方法

    公开(公告)号:US08232735B2

    公开(公告)日:2012-07-31

    申请号:US12497682

    申请日:2009-07-05

    IPC分类号: H05B41/16

    摘要: A system drives one or a plurality of LEDs, regulating their brightness by controlling the LEDs' average current or voltage. The system includes a switching power converter and an integrated digital regulator with at least one of electrical, thermal, and optical feedbacks. The regulator is constructed as a hysteretic peak current mode controller for continuous mode of operation of the power converter. For a discontinuous mode of operation of the power converter, a pulse averaging sliding mode control is used. Average LED current is measured by integrating LED pulse current at off time and hysteretically adjusting on time of the power switch. An input battery is protected from discharging at abnormally low impedance of the output.

    摘要翻译: 系统驱动一个或多个LED,通过控制LED的平均电流或电压来调节其亮度。 该系统包括开关功率转换器和具有电,热和光反馈中的至少一个的集成数字调节器。 调节器被构造为用于功率转换器的连续运行模式的迟滞峰值电流模式控制器。 对于功率转换器的不连续操作模式,使用脉冲平均滑模控制。 通过在关闭时间集成LED脉冲电流并根据电源开关的时间进行滞后调节来测量平均LED电流。 输入电池的输入电阻异常低,防止放电。

    Digitally controlled current regulator for high power solid state lighting
    52.
    发明申请
    Digitally controlled current regulator for high power solid state lighting 有权
    数字控制电流调节器,用于高功率固态照明

    公开(公告)号:US20120081018A1

    公开(公告)日:2012-04-05

    申请号:US13280555

    申请日:2011-10-25

    IPC分类号: H05B37/02

    摘要: An exemplary apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. An exemplary apparatus comprises a memory adapted to store a plurality of current parameters; and a control circuit adapted to modulate an energizing cycle time period for providing a substantially constant DC average current to the solid state lighting in response to a selected current parameter of the plurality of current parameters. In an exemplary embodiment, the control circuit modulates a current provided to the solid state lighting in response to a predetermined minimum current level (IMIN) parameter and a predetermined peak current level (IP) parameter, such that the DC average current level (IO) is substantially proportional to one-half of a sum of a predetermined peak current level (“IP”) and a predetermined minimum current level I M  ( I O ∝ I P + I MIN 2 ) .

    摘要翻译: 示例性装置实施例提供用于控制提供给固态照明的电流,例如发光二极管。 示例性装置包括适于存储多个当前参数的存储器; 以及控制电路,其适于响应于所述多个当前参数的选定的当前参数,调制通电周期时间段,以提供基本上恒定的DC平均电流至所述固态照明。 在示例性实施例中,控制电路响应于预定的最小电流电平(IMIN)参数和预定的峰值电流电平(IP)参数来调制提供给固态照明的电流,使得DC平均电流电平(IO) 基本上与预定的峰值电流电平(“IP”)和预定的最小电流电平I MIN(IOαIP + I MIN 2)的和的一半成比例。

    Digitally controlled current regulator for high power solid state lighting
    53.
    发明授权
    Digitally controlled current regulator for high power solid state lighting 失效
    数字控制电流调节器,用于高功率固态照明

    公开(公告)号:US08067896B2

    公开(公告)日:2011-11-29

    申请号:US11804549

    申请日:2007-05-18

    IPC分类号: H05B41/16 G09G3/36

    摘要: An exemplary apparatus embodiment provides for controlling current supplied to solid state lighting, such as light emitting diodes. An exemplary apparatus comprises a memory adapted to store a plurality of current parameters; and a control circuit adapted to modulate an energizing cycle time period for providing a substantially constant DC average current to the solid state lighting in response to a selected current parameter of the plurality of current parameters. In an exemplary embodiment, the control circuit modulates a current provided to the solid state lighting in response to a predetermined minimum current level (IMIN) parameter and a predetermined peak current level (IP) parameter, such that the DC average current level (IO) is substantially proportional to one-half of a sum of a predetermined peak current level (“IP”) and a predetermined minimum current level I M ⁡ ( I O ∝ I P + I MIN 2 ) .

    摘要翻译: 示例性装置实施例提供用于控制提供给固态照明的电流,例如发光二极管。 示例性装置包括适于存储多个当前参数的存储器; 以及控制电路,其适于响应于所述多个当前参数的选定的当前参数,调制通电周期时间段,以提供基本上恒定的DC平均电流至所述固态照明。 在示例性实施例中,控制电路响应于预定的最小电流电平(IMIN)参数和预定的峰值电流电平(IP)参数来调制提供给固态照明的电流,使得DC平均电流电平(IO) 基本上与预定的峰值电流电平(“IP”)和预定的最小电流电平IM⁡(IOαIP + I MIN 2)的和的一半成比例。

    Time Division Modulation With Average Current Regulation for Independent Control of Arrays of Light Emitting Diodes
    54.
    发明申请
    Time Division Modulation With Average Current Regulation for Independent Control of Arrays of Light Emitting Diodes 有权
    用于发光二极管阵列的独立控制的平均电流调节的时分调制

    公开(公告)号:US20110187276A1

    公开(公告)日:2011-08-04

    申请号:US13019764

    申请日:2011-02-02

    IPC分类号: H05B37/00

    摘要: Exemplary apparatus, method and system embodiments provide for separately and independently sourcing current to a series of light emitting diodes of a plurality of series of light emitting diodes. An exemplary apparatus comprises a power converter which generates a current, a first multiplexer, and a controller. The controller provides for sequential and separate switching of the current through the first multiplexer to each of the series of light emitting diodes for a corresponding period of time. An average current provided by the power converter is determined as substantially equal to a sum of the corresponding currents through the plurality of series of light emitting diodes. A total period for switching current to all of the series of light emitting diodes is also determined. A corresponding time period for switching current to a selected corresponding series of light emitting diodes is substantially equal to a proportion of the total period determined as a ratio of the corresponding current for the selected corresponding series of light emitting diodes to the average current provided by the power converter.

    摘要翻译: 示例性的装置,方法和系统实施例提供了单独和独立地将电流提供给多系列发光二极管的一系列发光二极管。 示例性装置包括产生电流的电力转换器,第一多路复用器和控制器。 控制器提供在相应的时间段内将通过第一多路复用器的电流顺序地和分开地切换到该系列发光二极管中的每一个。 由功率转换器提供的平均电流被确定为基本上等于通过多个发光二极管系列的相应电流之和。 还确定了对所有系列发光二极管切换电流的总周期。 用于将电流切换到所选择的相应系列发光二极管的相应时间段基本上等于作为所选择的相应系列发光二极管的相应电流与由所述发光二极管提供的平均电流的比率确定的总周期的比例 电源转换器

    System and method for driving LED
    55.
    发明授权
    System and method for driving LED 有权
    LED驱动系统及方法

    公开(公告)号:US07583035B2

    公开(公告)日:2009-09-01

    申请号:US11838186

    申请日:2007-08-13

    IPC分类号: G05F1/00

    摘要: A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital regulator with at least one of electrical, thermal and optical feedbacks. The regulator is constructed as a hysteretic peak current mode controller for continuous mode of operation of the power converter. For discontinuous mode of operation of the power converter a pulse averaging sliding mode control is being used. Average LED current is measured by integrating LED pulse current at off time and hysteretically adjusting on time of the power switch. Input battery is protected from discharging at abnormally low impedance of the output.

    摘要翻译: 系统通过控制LED的平均电流或电压驱动一个或多个LED来调节其亮度。 该系统包括开关电源转换器和具有电,热和光反馈中的至少一个的集成数字调节器。 调节器被构造为用于功率转换器的连续运行模式的迟滞峰值电流模式控制器。 对于功率转换器的不连续运行模式,正在使用脉冲平均滑模控制。 通过在关闭时间集成LED脉冲电流并根据电源开关的时间进行滞后调节来测量平均LED电流。 输入电池防止输出异常低阻抗放电。

    System and method for input current shaping in a power converter
    56.
    发明授权
    System and method for input current shaping in a power converter 有权
    电力转换器中输入电流整形的系统和方法

    公开(公告)号:US07433211B1

    公开(公告)日:2008-10-07

    申请号:US10880221

    申请日:2004-06-28

    IPC分类号: H02M3/335

    摘要: A power converter delivers electrical power from an electrical power source to a load according to a plurality of operation modes, where at least one of the operation modes is a peak current switching mode. Under the peak current switching mode, a switch controller controls the switch in the power converter to be kept on until the current through the switch reaches a peak current value corresponding to a given phase of the input voltage signal to the power converter. The peak current values have a reference shape, which may be a trapezoidal. The power converter may have any topology, such as a flyback-type power converter or a boost-type power converter.

    摘要翻译: 功率转换器根据多种操作模式将电力从电源传送到负载,其中至少一种操作模式是峰值电流切换模式。 在峰值电流切换模式下,开关控制器控制功率转换器中的开关保持导通,直到通过开关的电流达到对应于与功率转换器的输入电压信号的给定相位相对应的峰值电流值。 峰值电流值具有参考形状,其可以是梯形。 功率转换器可以具有任何拓扑,例如反激式功率转换器或升压型功率转换器。

    System and Method for Driving LED
    57.
    发明申请
    System and Method for Driving LED 有权
    LED驱动系统及方法

    公开(公告)号:US20070285031A1

    公开(公告)日:2007-12-13

    申请号:US11838186

    申请日:2007-08-13

    IPC分类号: H05B41/36

    摘要: A system drives one or plurality of LEDs regulating their brightness by controlling LEDs average current or voltage. The system includes a switching power converter and an integrated digital regulator with at least one of electrical, thermal and optical feedbacks. The regulator is constructed as a hysteretic peak current mode controller for continuous mode of operation of the power converter. For discontinuous mode of operation of the power converter a pulse averaging sliding mode control is being used. Average LED current is measured by integrating LED pulse current at off time and hysteretically adjusting on time of the power switch. Input battery is protected from discharging at abnormally low impedance of the output.

    摘要翻译: 系统通过控制LED的平均电流或电压驱动一个或多个LED来调节其亮度。 该系统包括开关电源转换器和具有电,热和光反馈中的至少一个的集成数字调节器。 调节器被构造为用于功率转换器的连续运行模式的迟滞峰值电流模式控制器。 对于功率转换器的不连续运行模式,正在使用脉冲平均滑模控制。 通过在关闭时间集成LED脉冲电流并根据电源开关的时间进行滞后调节来测量平均LED电流。 输入电池防止输出异常低阻抗放电。

    Time division modulation with average current regulation for independent control of arrays of light emitting diodes
    58.
    发明授权
    Time division modulation with average current regulation for independent control of arrays of light emitting diodes 有权
    具有用于独立控制发光二极管阵列的平均电流调节的时分调制

    公开(公告)号:US08264169B2

    公开(公告)日:2012-09-11

    申请号:US13019764

    申请日:2011-02-02

    IPC分类号: H05B37/00

    摘要: Representative method and computer-readable medium embodiments provide for sourcing current to a series of light emitting diodes in a plurality of series of light emitting diodes. A representative method comprises generating a current, sequentially and separately switching the current to each of the series of light emitting diodes in the plurality of series of light emitting diodes for a corresponding period of time, and predicting an output voltage across a selected series of light emitting diodes using a plurality of parameters stored in a memory.

    摘要翻译: 代表性的方法和计算机可读介质实施例提供了将电流提供给多个发光二极管系列中的一系列发光二极管。 一种代表性的方法包括产生电流,顺序地和分别地将电流切换到多个发光二极管系列的发光二极管中的每一个在相应的时间段内,并预测所选择的一系列光的输出电压 使用存储在存储器中的多个参数的发光二极管。

    Time division modulation with average current regulation for independent control of arrays of light emitting diodes
    59.
    发明授权
    Time division modulation with average current regulation for independent control of arrays of light emitting diodes 有权
    具有用于独立控制发光二极管阵列的平均电流调节的时分调制

    公开(公告)号:US07902771B2

    公开(公告)日:2011-03-08

    申请号:US11603689

    申请日:2006-11-21

    IPC分类号: H05B37/00

    摘要: Exemplary apparatus, method and system embodiments provide for separately and independently sourcing current to a series of light emitting diodes of a plurality of series of light-emitting diodes. An exemplary apparatus comprises a power converter which generates a current, a first multiplexer, and a controller. The controller provides for sequential and separate switching of the current through the first multiplexer to each of the series of light-emitting diodes for a corresponding period of time. An average current provided by the power converter is determined as substantially equal to a sum of the corresponding currents through the plurality of series of light-emitting diodes. A total period for switching current to all of the series of light-emitting diodes is also determined. A corresponding time period for switching current to a selected corresponding series of light-emitting diodes is substantially equal to a proportion of the total period determined as a ratio of the corresponding current for the selected corresponding series of light-emitting diodes to the average current provided by the power converter.

    摘要翻译: 示例性的装置,方法和系统实施例提供了单独且独立地将电流提供给多系列发光二极管的一系列发光二极管。 示例性装置包括产生电流的电力转换器,第一多路复用器和控制器。 控制器提供在相应的时间段内将通过第一多路复用器的电流顺序地和分开地切换到每个系列的发光二极管。 由功率转换器提供的平均电流被确定为基本上等于通过多个发光二极管串联的相应电流之和。 还确定了对所有系列发光二极管的开关电流的总周期。 用于将电流切换到所选择的相应系列的发光二极管的相应时间段基本上等于作为所选择的相应系列发光二极管的相应电流与所提供的平均电流的比率确定的总周期的比例 由电源转换器。

    Current regulator for modulating brightness levels of solid state lighting
    60.
    发明授权
    Current regulator for modulating brightness levels of solid state lighting 有权
    用于调节固态照明亮度水平的电流调节器

    公开(公告)号:US07902769B2

    公开(公告)日:2011-03-08

    申请号:US11655308

    申请日:2007-01-19

    IPC分类号: G05F1/00

    摘要: An exemplary embodiment provides a current regulator for controlling variable brightness levels for solid state lighting. The current regulator is couplable to a phase-modulating switch, such as a dimmer switch, which is coupled to an AC line voltage. An exemplary current regulator includes a rectifier; a switching power supply providing a first current; an impedance matching circuit; and a controller. The impedance matching circuit is adapted to provide a second current through the phase-modulating switch when a magnitude of the first current is below a first predetermined threshold, such as a holding current of a triac of the phase-modulating switch. The controller is adapted to determine a root-mean-square (RMS) voltage level provided by the phase-modulating switch from the AC line voltage and to determine a duty cycle for pulse-width current modulation by the switching power supply in response to the comparison of the RMS voltage level to a nominal voltage level.

    摘要翻译: 示例性实施例提供用于控制固态照明的可变亮度水平的电流调节器。 电流调节器可耦合到相位调制开关,例如耦合到AC线电压的调光开关。 示例性电流调节器包括整流器; 提供第一电流的开关电源; 阻抗匹配电路; 和控制器。 当第一电流的幅度低于第一预定阈值(例如相位调制开关的三端双向可控硅开关的保持电流)时,阻抗匹配电路适于提供通过相位调制开关的第二电流。 控制器适于从AC线电压确定由相位调制开关提供的均方根(RMS)电压电平,并且响应于所述开关电源确定用于脉冲宽度电流调制的占空比 将RMS电压电平与标称电压电平进行比较。