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    Circuits and methods for increasing power factor of switch mode power supply
    4.
    发明授权
    Circuits and methods for increasing power factor of switch mode power supply 有权
    提高开关电源功率因数的电路和方法

    公开(公告)号：US08964415B2

    公开(公告)日：2015-02-24

    申请号：US13610790

    申请日：2012-09-11

    申请人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

    发明人： Yajiang Zhu ,  Na Liu ,  Siyuan Xu

    IPC分类号： H02M3/335

    CPC分类号： H02M1/4258 ,  Y02B70/126

    摘要： A switching mode power supply (SMPS) includes a rectifying device configured for converting a periodically varying input AC (alternating current) voltage into a DC (direct current) voltage, and a transformer including a primary winding, a secondary winding, and an auxiliary winding. The primary winding is coupled to the rectifying device. An input capacitor is coupled to the rectifying device and the primary winding of the transformer. A first power switch is coupled to the input capacitor. A control circuit is coupled to the first power switch and is configured to control the first power switch based on a phase or amplitude of the input AC voltage. By controlling the charging and discharging of the input capacitor, power is provided to the primary winding during a longer portion of the AC input voltage cycle, allowing the rectifier device to have a larger conduction angle to increase a power factor (PF).

    摘要翻译： 开关模式电源（SMPS）包括被配置为将周期性变化的输入AC（交流）电压转换为DC（直流）电压的整流装置，以及包括初级绕组，次级绕组和辅助绕组 。 初级绕组耦合到整流装置。 输入电容器耦合到整流装置和变压器的初级绕组。 第一电源开关耦合到输入电容器。 控制电路耦合到第一电源开关，并且被配置为基于输入AC电压的相位或幅度来控制第一功率开关。 通过控制输入电容器的充电和放电，在交流输入电压周期的较长部分期间向初级绕组提供功率，允许整流器件具有较大的导通角以增加功率因数（PF）。

    Hybrid representation for deterministic finite automata
    5.
    发明授权
    Hybrid representation for deterministic finite automata 有权
    确定性有限自动机的混合表示

    公开(公告)号：US08261352B2

    公开(公告)日：2012-09-04

    申请号：US12468454

    申请日：2009-05-19

    申请人： Qingming Ma ,  Bryan Burns ,  Sheng Li ,  Na Liu ,  Xuejun Wu ,  Shan Yu ,  Li Zheng

    发明人： Qingming Ma ,  Bryan Burns ,  Sheng Li ,  Na Liu ,  Xuejun Wu ,  Shan Yu ,  Li Zheng

    IPC分类号： G06F21/06

    CPC分类号： H04L63/1416

    摘要： A method includes receiving a data unit, determining whether a current state, associated with a deterministic finite automata (DFA) that includes a portion of states in a bitmap and a remaining portion of states in a DFA table, is a bitmap state or not, and determining whether a value corresponding to the data unit is greater than a threshold value, when it is determined that the current state is not a bitmap state. The method further includes determining whether the current state is insensitive, when it is determined that the value corresponding to the data unit is greater than the threshold value, where insensitive means that each next state is a same state for the current state, and selecting a default state, as a next state for the current, when it is determined that the current state is insensitive.

    摘要翻译： 一种方法包括接收数据单元，确定与包括位图中的状态的一部分和DFA表中的剩余部分状态的确定性有限自动机（DFA）相关联的当前状态是否为位图状态， 以及当确定当前状态不是位图状态时，确定对应于所述数据单元的值是否大于阈值。 该方法还包括当确定对应于数据单元的值大于阈值时确定当前状态是否不敏感，其中不确定意味着每个下一状态对于当前状态是相同的状态，并且选择 默认状态，作为当前的下一状态，当确定当前状态不敏感时。

    CIRCUIT AND METHOD FOR DRIVING LED LAMP WITH A DIMMER
    6.
    发明申请
    CIRCUIT AND METHOD FOR DRIVING LED LAMP WITH A DIMMER 有权
    用于驱动LED灯的电路和方法

    公开(公告)号：US20120056548A1

    公开(公告)日：2012-03-08

    申请号：US13224325

    申请日：2011-09-01

    申请人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

    发明人： Jianhua Duan ,  Xuegang Ren ,  Na Liu

    IPC分类号： H05B37/02 ,  G05F5/00

    CPC分类号： H05B33/0851 ,  H05B33/0815 ,  H05B33/0818

    摘要： A system for driving an LED (light-emitting diode) lamp includes a dimmer circuit coupled to a line input voltage for varying a magnitude of an input voltage and a transformer having a primary winding, a secondary winding, and one or more auxiliary windings, the primary winding coupled to the dimmer circuit. The system also includes an output rectifying circuit coupled to the secondary winding for providing an output current to the LED lamp and a power switch coupled to the primary winding for controlling a current flow in the primary winding. The system further includes a controller having a comparator and a capacitor for providing a control signal to control the power switch for regulating the output current. The controller coupled to the dimmer circuit for receiving an average input voltage signal from the dimmer circuit, wherein the control signal is characterized by a duty cycle that is determined by a ratio of a charging current to a discharging current of the capacitor, and the ratio is related to the average input voltage signal from the dimmer circuit.

    摘要翻译： 用于驱动LED（发光二极管）灯的系统包括耦合到用于改变输入电压的大小的线路输入电压的调光器电路和具有初级绕组，次级绕组和一个或多个辅助绕组的变压器， 耦合到调光器电路的初级绕组。 该系统还包括耦合到次级绕组的输出整流电路，用于向LED灯提供输出电流，以及耦合到初级绕组的功率开关，用于控制初级绕组中的电流。 该系统还包括具有比较器和电容器的控制器，用于提供控制信号以控制用于调节输出电流的功率开关。 所述控制器耦合到所述调光器电路，用于接收来自所述调光器电路的平均输入电压信号，其中所述控制信号的特征在于由充电电流与所述电容器的放电电流的比率确定的占空比， 与来自调光电路的平均输入电压信号有关。

    Liquid crystal device and methods thereof
    7.
    发明申请
    Liquid crystal device and methods thereof 有权
    液晶装置及其方法

    公开(公告)号：US20100014037A1

    公开(公告)日：2010-01-21

    申请号：US12459153

    申请日：2009-06-26

    申请人： Ke Zhang ,  Philip J. Bos ,  Robert J. Twieg ,  Na Liu

    发明人： Ke Zhang ,  Philip J. Bos ,  Robert J. Twieg ,  Na Liu

    IPC分类号： G02F1/1337

    CPC分类号： G02F1/133711 ,  G02F2001/133738 ,  G02F2001/133742 ,  Y10T428/1005 ,  Y10T428/1018 ,  Y10T428/1023

    摘要： Provided is a liquid crystal (LC) device and method thereof. The device comprises (i) a body of liquid crystal, (ii) a first layer comprising a first material, and (iii) a second layer comprising a second material; wherein the first layer is located between the body of liquid crystal and the second layer; the first layer alone aligns the liquid crystal in a first orientation; the second layer alone aligns the liquid crystal in a second orientation; and the first orientation is different from the second orientation. With optimized first layer thickness, the invention can be used in sensor applications to improve detection sensitivity, and in LCD applications with enhanced control over LC pretilt transition.

    摘要翻译： 提供一种液晶（LC）装置及其方法。 该装置包括（i）液晶体，（ii）包含第一材料的第一层，和（iii）包含第二材料的第二层; 其中所述第一层位于所述液晶体和所述第二层之间; 第一层单独将液晶以第一取向对准; 第二层单独使第二取向的液晶对准; 并且第一取向与第二取向不同。 通过优化的第一层厚度，本发明可用于传感器应用中，以提高检测灵敏度，并且在液晶显示应用中可以增强对LC预倾斜转换的控制。

    LITHIUM-ION BATTERIES AND CATHODE MATERIALS THEREOF
    8.
    发明申请
    LITHIUM-ION BATTERIES AND CATHODE MATERIALS THEREOF 审中-公开
    锂离子电池及其阴极材料

    公开(公告)号：US20130260231A1

    公开(公告)日：2013-10-03

    申请号：US13437152

    申请日：2012-04-02

    申请人： Bin Hua ,  Na Liu ,  Rui Xu

    发明人： Bin Hua ,  Na Liu ,  Rui Xu

    IPC分类号： H01M4/64 ,  H01M4/525

    CPC分类号： H01M4/525 ,  H01M4/364 ,  H01M4/366 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/021

    摘要： The invention provides a type of lithium-ion battery cathode materials applicable to a high charge cut-off voltage. The cathode materials comprises two active substances of LiCoO2 and Li (NixCoyMn1-x-y)O2, where 0.3≦x≦0.8, 0.1≦y≦0.4, and 0.6≦x+y≦0.9. Both LiCoO2 and Li(NixCoyMn1-x-y)O2 are doped with element M and then treated by surface coating with the oxide, sulfide, fluoride of element M′ or phosphate. The element M is at least one of the Mg, Ti, Al, Zr, B, La, Ce, Y, P, S, N or F while the element M′ is at least one of the Al, Ti, Mg, Zr, B, Si, Fe, La, Ce or Y. The cathode materials provided herein, having the advantages of excellent cycling performance and low cell swelling against high temperature, can help to remarkably increase the energy density of lithium-ion batteries. The invention also discloses a lithium-ion battery containing such cathode materials.

    摘要翻译： 本发明提供一种适用于高电荷截止电压的锂离子电池正极材料。 阴极材料包含两种LiCoO2和Li（NixCoyMn1-x-y）O2的活性物质，其中0.3 @ x @ 0.8,0.1 @ y @ 0.4和0.6 @ x + y @ 0.9。 LiCoO2和Li（NixCoyMn1-x-y）O2都掺杂有元素M，然后用元素M'或磷酸盐的氧化物，硫化物，氟化物进行表面涂覆处理。 元素M是Mg，Ti，Al，Zr，B，La，Ce，Y，P，S，N或F中的至少一种，而元素M'是Al，Ti，Mg，Zr中的至少一种 ，B，Si，Fe，La，Ce或Y.本文提供的具有优异的循环性能和低温度的低电池膨胀的优点的阴极材料有助于显着增加锂离子电池的能量密度。 本发明还公开了一种含有这种阴极材料的锂离子电池。

    CONTROL CIRCUIT AND SYSTEM FOR SWITCH MODE POWER SUPPLY
    10.
    发明申请
    CONTROL CIRCUIT AND SYSTEM FOR SWITCH MODE POWER SUPPLY 有权
    用于开关电源的控制电路和系统

    公开(公告)号：US20130148387A1

    公开(公告)日：2013-06-13

    申请号：US13338857

    申请日：2011-12-28

    申请人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

    发明人： Xuegang Ren ,  Jianhua Duan ,  Siyuan Xu ,  Na Liu ,  Zeqiang Chen

    IPC分类号： H02M3/335

    CPC分类号： H02M1/36 ,  H02M3/33507 ,  H02M2001/0025

    摘要： A switch-mode power supply (SMPS) includes a transformer having a primary winding coupled to a power switch, a secondary winding for providing an output of the power supply, and a controller. The controller includes a first input terminal for receiving a current sensing signal related to a current in the primary winding, a second input terminal for receiving a feedback signal related to a current in the secondary winding, and an output terminal for providing a control signal to turn on and off the power switch. When the feedback signal is higher than a first reference voltage, the controller is configured to cause the SMPS to maintain a constant output current at a first current magnitude. When the feedback signal is lower than the first reference voltage, the controller is configured to cause the SMPS to provide a second output current at a second current magnitude higher than the first current magnitude.

    摘要翻译： 开关电源（SMPS）包括具有耦合到功率开关的初级绕组的变压器，用于提供电源的输出的次级绕组和控制器。 该控制器包括用于接收与初级绕组中的电流相关的电流感测信号的第一输入端子，用于接收与次级绕组中的电流有关的反馈信号的第二输入端，以及用于向第二输入端提供控制信号 打开和关闭电源开关。 当反馈信号高于第一参考电压时，控制器被配置为使得SMPS在第一电流幅度下保持恒定的输出电流。 当反馈信号低于第一参考电压时，控制器被配置为使得SMPS以比第一电流幅度高的第二电流幅度提供第二输出电流。