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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
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。
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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
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。
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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
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。
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公开(公告)号：US20130049626A1
公开(公告)日：2013-02-28
申请号：US13585170
申请日：2012-08-14
申请人： Wanfeng ZHANG , InHwan Oh
发明人： Wanfeng ZHANG , InHwan Oh
CPC分类号： H05B33/0815
摘要： Aspects of the disclosure provide a circuit. The circuit includes a first switch, a second switch and a controller. The first switch is switched on and off to allow a boost circuit to transfer electric energy from an input power supply to a capacitor to generate an intermediate power supply having a higher voltage than the input power supply. The second switch is switched on and off to allow a buck circuit to provide a driving voltage based on the intermediate power supply to drive a load device, and to regulate a current to the load device. The controller is configured to provide a first signal to the first switch and a second signal to the second switch to switch on and off the first switch and the second switch.
摘要翻译： 本公开的方面提供电路。 电路包括第一开关，第二开关和控制器。 第一开关被接通和关断以允许升压电路将电能从输入电源传送到电容器以产生具有比输入电源更高的电压的中间电源。 第二开关被接通和关断以允许降压电路基于中间电源提供驱动电压以驱动负载装置，并调节到负载装置的电流。 控制器被配置为向第一开关提供第一信号，并将第二信号提供给第二开关以接通和断开第一开关和第二开关。
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公开(公告)号：US08847517B2
公开(公告)日：2014-09-30
申请号：US13525711
申请日：2012-06-18
申请人： Sehat Sutardja , Pantas Sutardja , Wanfeng Zhang , Jinho Choi
发明人： Sehat Sutardja , Pantas Sutardja , Wanfeng Zhang , Jinho Choi
CPC分类号： H05B33/0815 , H02M3/33507 , H05B33/0851
摘要： A system includes a transformer. The transformer includes a first coil and a second coil. The first coil is configured to receive a first voltage based on an output of a switching circuit. The second coil is configured to generate a first current based on the first voltage to power a solid-state load. The system also includes a third coil. The third coil is configured to generate a second voltage based on the first voltage.
摘要翻译： 一个系统包括一个变压器。 变压器包括第一线圈和第二线圈。 第一线圈被配置为基于开关电路的输出接收第一电压。 第二线圈被配置为基于第一电压产生第一电流以对固态负载供电。 该系统还包括第三线圈。 第三线圈被配置为基于第一电压产生第二电压。
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公开(公告)号：US20120212258A1
公开(公告)日：2012-08-23
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： H03K5/153
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。
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公开(公告)号：US20120163040A1
公开(公告)日：2012-06-28
申请号：US13336467
申请日：2011-12-23
IPC分类号： H02M3/335
摘要： Disclosed is flyback converter having a controller that performs a startup switching process when the flyback converter is powered up, and then performs normal switching afterward. The controller includes a pulse generator to generate a control signal for normal switching. During startup switching, the controller may generate a control signal by output every Nth pulse from the pulse generator. In another embodiment, the controller may generate pulses based on a sense signal provided from an input section of the flyback converter.
摘要翻译： 公开了具有控制器的反激式转换器，该控制器在反激式转换器通电时进行启动切换处理，之后进行正常切换。 该控制器包括脉冲发生器，以产生用于正常切换的控制信号。 在启动切换期间，控制器可以通过从脉冲发生器输出每第N个脉冲来产生控制信号。 在另一个实施例中，控制器可以基于从反激转换器的输入部分提供的感测信号产生脉冲。
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公开(公告)号：US20120081029A1
公开(公告)日：2012-04-05
申请号：US13246515
申请日：2011-09-27
申请人： Jinho Choi , Yangsoo Park , Wanfeng Zhang
发明人： Jinho Choi , Yangsoo Park , Wanfeng Zhang
CPC分类号： H02M3/33507 , H02M2001/0009 , H05B33/0815
摘要： In one embodiment, an apparatus includes a transformer comprising a primary side and a secondary side. A switch is coupled to the primary side. A control signal circuit is configured to: sample a first current on the primary side of the transformer; estimate a second current value on the secondary side of the transformer using the sampling of the first current on the primary side and a turn ratio of the transformer; and output a signal to control a turn on time for the switch.
摘要翻译： 在一个实施例中，一种装置包括一个包括初级侧和次级侧的变压器。 开关耦合到初级侧。 控制信号电路被配置为：对变压器的初级侧的第一电流进行采样; 使用初级侧的第一电流的采样和变压器的匝数比来估计变压器次级侧的第二电流值; 并输出信号以控制开关的导通时间。
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公开(公告)号：US20100253395A1
公开(公告)日：2010-10-07
申请号：US12752992
申请日：2010-04-01
申请人： Radu Pitigoi-Aron , Wanfeng Zhang
发明人： Radu Pitigoi-Aron , Wanfeng Zhang
IPC分类号： H03B1/00
CPC分类号： H03K17/08122
摘要： Particular embodiments generally relate to driver structures. In one embodiment, an apparatus includes a first driver that drives a first current for a transistor. The first driver drives the first current during a first portion of a drive time of driving the transistor. The first driver is OFF during a second portion. A second driver drives a second current for the transistor during the second portion.
摘要翻译： 具体实施方案通常涉及驱动器结构。 在一个实施例中，一种装置包括驱动晶体管的第一电流的第一驱动器。 在驱动晶体管的驱动时间的第一部分期间，第一驱动器驱动第一电流。 第一个驱动程序在第二部分关闭。 在第二部分期间，第二驱动器驱动晶体管的第二电流。
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10.发明授权Parallel current mode control using a direct duty cycle algorithm with low computational requirements to perform power factor correction 失效使用具有低计算要求的直接占空比算法进行并联电流模式控制来执行功率因数校正公开(公告)号：US07514913B2
公开(公告)日：2009-04-07
申请号：US11951228
申请日：2007-12-05
申请人： Wanfeng Zhang , Yan-Fei Liu , Bin Wu
发明人： Wanfeng Zhang , Yan-Fei Liu , Bin Wu
CPC分类号： H02M3/157 , H02M1/4225 , H02M2001/4275 , Y02B70/126 , Y02P80/112
摘要： A method and apparatus to implement parallel current mode control that is suitable for digital and analog implementation. A duty cycle algorithm is composed of a voltage term and a parallel current term which depends on the inductor current change between the inductor current value at the beginning of a switching cycle and the reference inductor current value at the end of that switching cycle. Parallel current mode control can be applied to all DC-DC converters, including both non-isolated and isolated topologies. It can also be applied to AC-DC converters with power factor correction.
摘要翻译： 一种适用于数字和模拟实现的并行电流模式控制的方法和装置。 占空比算法由电压项和并联电流项组成，取决于开关周期开始时的电感电流值与开关周期结束时的参考电感电流值之间的电感电流变化。 并联电流模式控制可应用于所有DC-DC转换器，包括非隔离和隔离拓扑。 它也可以应用于具有功率因数校正的AC-DC转换器。
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