公开(公告)号：US08552658B2

公开(公告)日：2013-10-08

申请号：US12547240

申请日：2009-08-25

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0851

摘要： Apparatuses, methods, systems, and circuits for light-emitting diode (LED) control are disclosed. In one embodiment, an LED control circuit can include a first pin receiving an input voltage supply; a second pin receiving a primary signal from a primary winding of a transformer coupled to the LED; a third pin coupled to a ground supply; and logic configured to estimate an output current and/or output voltage at the LED coupled to a secondary winding of the transformer from the input voltage supply and the primary signal.

摘要翻译： 公开了用于发光二极管（LED）控制的装置，方法，系统和电路。 在一个实施例中，LED控制电路可以包括接收输入电压源的第一引脚; 第二引脚从耦合到所述LED的变压器的初级绕组接收主信号; 耦合到地面电源的第三引脚; 以及被配置为从所述输入电压源和所述主信号估计耦合到所述变压器的次级绕组的所述LED处的输出电流和/或输出电压的逻辑。

公开(公告)号：US08344709B2

公开(公告)日：2013-01-01

申请号：US12556859

申请日：2009-09-10

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： G05F1/10 ,  G05F1/40 ,  G05F5/00

CPC分类号： G05F1/565 ,  H02M3/156 ,  H02M2001/0009 ,  H05B33/0815 ,  Y02B20/346

摘要： In one embodiment, the present invention includes a circuit having a voltage estimation circuit to receive a first voltage and generate an estimation of an output voltage of a power conversion circuit based on the first voltage. The first voltage is from a circuit node between a first terminal of a switch and a first terminal of an inductor. The circuit further comprises a current estimation circuit to receive a first current and generate an estimation of an output current of the power conversion circuit based on the first current. The first current is a current through the switch. The circuit further includes a pulse width modulation circuit to produce a pulse width modulated signal based on the estimation of an output voltage and the estimation of an output current.

摘要翻译： 在一个实施例中，本发明包括具有电压估计电路的电路，用于接收第一电压并且基于第一电压产生功率转换电路的输出电压的估计。 第一电压来自开关的第一端子和电感器的第一端子之间的电路节点。 电路还包括电流估计电路，用于接收第一电流并且基于第一电流产生功率转换电路的输出电流的估计。 第一个电流是通过开关的电流。 该电路还包括脉冲宽度调制电路，用于基于输出电压的估计和输出电流的估计来产生脉宽调制信号。

公开(公告)号：US20100090671A1

公开(公告)日：2010-04-15

申请号：US12556859

申请日：2009-09-10

申请人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

发明人： Wanfeng Zhang ,  Jianqing Lin ,  Shaoan Dai

IPC分类号： G05F1/46

CPC分类号： G05F1/565 ,  H02M3/156 ,  H02M2001/0009 ,  H05B33/0815 ,  Y02B20/346

摘要： In one embodiment, the present invention includes a circuit comprising a voltage estimation circuit to receive a first voltage and generate an estimation of an output voltage of a power conversion circuit based on the first voltage. The first voltage is from a circuit node between a first terminal of a switch and a first terminal of an inductor. The circuit further comprises a current estimation circuit to receive a first current and generate an estimation of an output current of the power conversion circuit based on the first current. The first current is a current through the switch. The circuit further comprises a pulse width modulation circuit to produce a pulse width modulated signal based on the estimation of an output voltage and the estimation of an output current.

摘要翻译： 在一个实施例中，本发明包括电路，该电路包括用于接收第一电压并基于第一电压产生功率转换电路的输出电压的估计的电压估计电路。 第一电压来自开关的第一端子和电感器的第一端子之间的电路节点。 电路还包括电流估计电路，用于接收第一电流并且基于第一电流产生功率转换电路的输出电流的估计。 第一个电流是通过开关的电流。 该电路还包括脉冲宽度调制电路，用于基于输出电压的估计和输出电流的估计来产生脉宽调制信号。

公开(公告)号：US08957602B2

公开(公告)日：2015-02-17

申请号：US13548797

申请日：2012-07-13

申请人： Wanfeng Zhang ,  Pantas Sutardja

发明人： Wanfeng Zhang ,  Pantas Sutardja

IPC分类号： G05F1/00 ,  H05B37/02 ,  H05B39/04 ,  H05B41/36 ,  H05B33/08

CPC分类号： H05B33/086

摘要： New and useful methods and systems for providing lighting control are disclosed. For example, in an embodiment a lighting system includes one or more first solid state lights having a first aesthetic color, one or more second solid state lights having a second aesthetic color, the second aesthetic color having an appreciably longer wavelength than the first aesthetic color, and an amplitude correlation circuit configured to control a ratio of first light produced by the one or more first solid state lights to second light produced by the one or more second solid state lights as a function of a received dimming control signal.

摘要翻译： 公开了用于提供照明控制的新的有用的方法和系统。 例如，在一个实施例中，照明系统包括具有第一美学颜色的一个或多个第一固态光，具有第二美学颜色的一个或多个第二固态光，第二美学颜色具有比第一美学颜色明显更长的波长 以及幅度相关电路，被配置为控制由一个或多个第一固态光产生的第一光与由一个或多个第二固态光产生的第二光的比值作为接收到的调光控制信号的函数。

公开(公告)号：US08896288B2

公开(公告)日：2014-11-25

申请号：US13398150

申请日：2012-02-16

申请人： Jinho Choi ,  Hao Peng ,  Wanfeng Zhang ,  Tuyen Doan

发明人： Jinho Choi ,  Hao Peng ,  Wanfeng Zhang ,  Tuyen Doan

IPC分类号： G01D1/14 ,  H05B33/08 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC分类号： G01R19/0084 ,  G01R17/02 ,  H02M1/082 ,  H02M3/33523 ,  H02M2001/0022 ,  H05B33/0854

摘要： Methods, circuits, and systems for determining the presence of a chopped input signal are disclosed. A digital signal generator can produce multiple digital signals when an alternating current (AC) signal input reaches multiple threshold voltages. The times at which the threshold voltages are reached can be determined by looking at the times at which the digital signals go high and low. The differences between the times at which the digital signals go high and low are used to determine if the AC signal input is a leading or trailing edge chopped signal. The AC input signal is a leading edge chopped signal when the difference between the times at which the digital signals go high is less than a predetermined time threshold, and is a trailing edge chopped signal when the difference between the times at which the digital signals go low is less than a predetermined time threshold.

摘要翻译： 公开了用于确定斩波输入信号的存在的方法，电路和系统。 当交流（AC）信号输入达到多个阈值电压时，数字信号发生器可以产生多个数字信号。 达到阈值电压的时间可以通过查看数字信号变为高电平和低电平的时间来确定。 使用数字信号变为高电平和低电平的时间之间的差异来确定AC信号输入是前导或后沿斩波信号。 当数字信号变高的时间之间的差小于预定时间阈值时，AC输入信号是前沿斩波信号，并且当数字信号到达时间之间的差异时是后沿斩波信号 低于预定时间阈值。

公开(公告)号：US08796954B2

公开(公告)日：2014-08-05

申请号：US13272446

申请日：2011-10-13

申请人： Wanfeng Zhang ,  Radu Pitigoi-Aron ,  Daniel Reed

发明人： Wanfeng Zhang ,  Radu Pitigoi-Aron ,  Daniel Reed

IPC分类号： H05B37/02 ,  H05B39/04

CPC分类号： H05B33/0815

摘要： In one embodiment, an apparatus includes circuitry configured to receive a dimming input to control a dimming level of a lamp. Also, the apparatus includes circuitry configured to generate a control signal based on the dimming input. The control signal indicates the dimming level for a converter of the lamp and the converter is configured to interpret the control signal to control to the dimming level of the lamp using a sinusoidal signal.

摘要翻译： 在一个实施例中，一种装置包括被配置为接收调光输入以控制灯的调光水平的电路。 而且，该装置包括经配置以基于调光输入产生控制信号的电路。 控制信号指示灯的转换器的调光电平，并且转换器被配置为使用正弦信号来解释控制信号以控制灯的调光电平。

公开(公告)号：US09497807B2

公开(公告)日：2016-11-15

申请号：US13023379

申请日：2011-02-08

申请人： Radu Pitigoi-Aron ,  Wanfeng Zhang ,  Jinho Choi

发明人： Radu Pitigoi-Aron ,  Wanfeng Zhang ,  Jinho Choi

IPC分类号： H05B37/02 ,  H05B33/08

CPC分类号： H05B33/0815 ,  Y02B20/383

摘要： In one embodiment, a dimmer circuit is coupled to an electronic load and receives an alternating current (AC) signal. A phase control circuit turns the dimmer circuit on for a first portion of the AC signal to turn on the electronic load. The dimmer circuit turns off during a second portion of the AC signal to turn off the electronic load. A switch is coupled to the phase control circuit. The switch is controlled to couple the phase control circuit to ground when the dimmer circuit is off where the switch is part of a power supply supplying power to the electronic load.

摘要翻译： 在一个实施例中，调光电路耦合到电子负载并且接收交流（AC）信号。 相位控制电路将交流信号的第一部分的调光电路导通，以接通电子负载。 在交流信号的第二部分期间，调光器电路关闭以关闭电子负载。 开关耦合到相位控制电路。 当调光器电路断开时，开关被控制为将相位控制电路耦合到地，其中开关是向电子负载供电的电源的一部分。

公开(公告)号：US09445475B1

公开(公告)日：2016-09-13

申请号：US13551118

申请日：2012-07-17

申请人： Sehat Sutardja ,  Pantas Sutardja ,  Wanfeng Zhang

发明人： Sehat Sutardja ,  Pantas Sutardja ,  Wanfeng Zhang

IPC分类号： H05B33/08

CPC分类号： H05B33/0857 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/0845

摘要： A light emitting diode (LED) lighting system includes a first string of first LEDs emitting light having a first color. A second string of second LEDs emits light having a second color and connected in series with the first string of first LEDs; A first switch and a second switch are connected in series. A regulator module is configured to modulate the first switch and the second switch to provide a desired current ratio. The desired current ratio corresponds to a ratio of a first current through the first string of first LEDs to a second current through the second string of second LEDs.

摘要翻译： 发光二极管（LED）照明系统包括发射具有第一颜色的光的第一串第一LED。 第二串第二LED发射具有第二颜色并与第一串第一LED串联连接的光; 第一开关和第二开关串联连接。 调节器模块被配置为调制第一开关和第二开关以提供期望的电流比。 期望的电流比对应于通过第一串第一LED的第一电流与通过第二LED的第二串的第二电流的比率。

公开(公告)号：US08374004B2

公开(公告)日：2013-02-12

申请号：US12814957

申请日：2010-06-14

申请人： Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Wanfeng Zhang

发明人： Sehat Sutardja ,  Ravishanker Krishnamoorthy ,  Wanfeng Zhang

IPC分类号： H02M3/335

CPC分类号： H02M3/335 ,  H02M3/33538

摘要： An isolated alternating current (AC)-direct current (DC) converter is disclosed. The isolated AC-DC converter comprises a slave control circuit including a slave driver module configured to receive a command and to control coupling of the slave control circuit to a primary-side inductor of a transformer based on the command, a master control circuit coupled to a secondary-side inductor of the transformer, the master control circuit including a master control module configured to sense a feedback voltage across a load and to generate the command based on the feedback voltage and a reference voltage, and a coupler configured to communicate the command from the master control module to the slave driver module and to provide isolation between the master control module and the slave driver module.

摘要翻译： 公开了一种隔离交流（AC） - 直流（DC）转换器。 隔离式AC-DC转换器包括从控制电路，其包括被配置为接收命令的从驱动器模块，并且基于该命令控制从控制电路与变压器的初级侧电感器的耦合，主控制电路耦合到 所述变压器的次级侧电感器，所述主控制电路包括主控制模块，所述主控制模块被配置为感测跨过负载的反馈电压并且基于所述反馈电压和参考电压产生所述指令;以及耦合器，被配置为将所述指令 从主控模块到从属驱动模块，并提供主控模块和从驱动模块之间的隔离。

公开(公告)号：US20110266976A1

公开(公告)日：2011-11-03

申请号：US13099042

申请日：2011-05-02

申请人： Wanfeng Zhang ,  Pantas Sutardja

发明人： Wanfeng Zhang ,  Pantas Sutardja

IPC分类号： H05B37/02

CPC分类号： H05B33/0845 ,  H05B33/086 ,  H05B37/0263

摘要： An apparatus includes a LED and a regulator circuit. The regulator circuit controls the current provided to the LED according to a calibration signal that is coupled to the current. The regulator circuit adjusts the output of the LED when the calibration signal is adjusted. In this manner, the LED may be calibrated to generate light at a desired brightness level and color level.

摘要翻译： 一种装置包括LED和调节器电路。 调节器电路根据耦合到电流的校准信号控制提供给LED的电流。 当调节校准信号时，调节器电路调节LED的输出。 以这种方式，可以校准LED以产生所需亮度级和色彩级的光。