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    LED driving circuit and controlling method thereof
    1.
    发明授权
    LED driving circuit and controlling method thereof 失效
    LED驱动电路及其控制方法

    公开(公告)号：US07728530B2

    公开(公告)日：2010-06-01

    申请号：US11595594

    申请日：2006-11-09

    申请人： Ji Wang ,  Yimin Zhang

    发明人： Ji Wang ,  Yimin Zhang

    IPC分类号： G05F1/00

    CPC分类号： H05B33/0815

    摘要： The invention discloses an LED driving circuit and a controlling method thereof, comprising a power switch and a current sampling unit, as well as a voltage comparison unit for comparing the voltage obtained by the current sampling unit with a first reference voltage; an input voltage sampling unit for converting the sampled input voltage into a current signal; a timing unit for controlling the off-time of the power switch or presetting a fixed off-time; a logical unit for controlling the power switch by means of a power switch driving unit and for controlling the timing switch in the timing unit. The method for controlling the LED driving circuit comprises the step of modulating the off-time of the power switch with the input voltage or the step of presetting a fixed off-time. The invention can be used in LED light cluster driving with the power factor greater than 0.95.

    摘要翻译： 本发明公开了一种LED驱动电路及其控制方法，包括电源开关和电流采样单元，以及用于将由电流采样单元获得的电压与第一参考电压进行比较的电压比较单元; 输入电压采样单元，用于将采样的输入电压转换为电流信号; 定时单元，用于控制电源开关的关闭时间或预设固定的关闭时间; 逻辑单元，用于通过电源开关驱动单元控制电源开关并用于控制定时单元中的定时开关。 用于控制LED驱动电路的方法包括利用输入电压调制电源开关的关断时间或者预设固定的关闭时间的步骤。 本发明可用于功率因数大于0.95的LED光簇驱动。

    LED driving circuit and controlling method thereof
    2.
    发明申请
    LED driving circuit and controlling method thereof 失效
    LED驱动电路及其控制方法

    公开(公告)号：US20070108916A1

    公开(公告)日：2007-05-17

    申请号：US11595594

    申请日：2006-11-09

    申请人： Ji Wang ,  Yimin Zhang

    发明人： Ji Wang ,  Yimin Zhang

    IPC分类号： H05B41/24

    CPC分类号： H05B33/0815

    摘要： The invention discloses an LED driving circuit and a controlling method thereof, comprising a power switch and a current sampling unit, as well as a voltage comparison unit for comparing the voltage obtained by the current sampling unit with a first reference voltage; an input voltage sampling unit for converting the sampled input voltage into a current signal; a timing unit for controlling the off-time of the power switch or presetting a fixed off-time; a logical unit for controlling the power switch by means of a power switch driving unit and for controlling the timing switch in the timing unit. The method for controlling the LED driving circuit comprises the step of modulating the off-time of the power switch with the input voltage or the step of presetting a fixed off-time. The invention can be used in LED light cluster driving with the power factor greater than 0.95.

    摘要翻译： 本发明公开了一种LED驱动电路及其控制方法，包括电源开关和电流采样单元，以及用于将由电流采样单元获得的电压与第一参考电压进行比较的电压比较单元; 输入电压采样单元，用于将采样的输入电压转换为电流信号; 定时单元，用于控制电源开关的关闭时间或预设固定的关闭时间; 逻辑单元，用于通过电源开关驱动单元控制电源开关并用于控制定时单元中的定时开关。 用于控制LED驱动电路的方法包括利用输入电压调制电源开关的关断时间或者预设固定的关闭时间的步骤。 本发明可用于功率因数大于0.95的LED光簇驱动。

    Low bend loss optical fiber
    3.
    发明授权
    Low bend loss optical fiber 有权
    低弯曲损耗光纤

    公开(公告)号：US08953917B2

    公开(公告)日：2015-02-10

    申请号：US13680641

    申请日：2012-11-19

    申请人： George Edward Berkey ,  Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Ming-Jun Li ,  Pushkar Tandon ,  Ji Wang

    发明人： George Edward Berkey ,  Dana Craig Bookbinder ,  Steven Bruce Dawes ,  Ming-Jun Li ,  Pushkar Tandon ,  Ji Wang

    IPC分类号： G02B6/036 ,  G02B6/028

    CPC分类号： G02B6/028 ,  G02B6/0286 ,  G02B6/03627 ,  G02B6/03638 ,  G02B6/0365

    摘要： According to some embodiments a single mode fiber includes: a germania doped central core region having outer radius r1 and relative refractive index Δ1; and a cladding region comprising (i) a first inner cladding region having an outer radius r2>6 microns and relative refractive index Δ2 and 0.3≦r1/r2≦0.85; and (ii) a second inner cladding region having an outer radius r3>9 microns and comprising a minimum relative refractive index Δ3, wherein said second inner cladding region has at least one region with a relative refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the second inner cladding region and comprising relative refractive index Δ4, wherein Δ1>Δ2>Δ3, Δ3

    摘要翻译： 根据一些实施例，单模光纤包括：具有外半径r1和相对折射率＆Dgr; 1的掺杂锗的中心芯区域; 包括区域，其包括（i）具有外半径r2> 6微米的第一内包层区域和相对折射率＆lt; Dgr; 2和0.3＆amp; nlE; r1 / r2＆nlE; 0.85; 和（ii）外半径r3> 9微米并且包括最小相对折射率＆lt; Dgr; 3的第二内包层区域，其中所述第二内包层区域具有至少一个相对折射率Δδ的区域变得更为负， 半径增加 4，一种包围第二内包层区域的外包层区，包括相对折射率＆Dgr; 4，其中＆Dgr; 1＆Dgr; 2＆Dgr; 3，＆Dgr; 3＆

    FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING
    5.
    发明申请
    FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING 有权
    用于模式分割多路复用的模式光纤

    公开(公告)号：US20130071114A1

    公开(公告)日：2013-03-21

    申请号：US13420037

    申请日：2012-03-14

    申请人： Scott Robertson Bickham ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Ji Wang

    发明人： Scott Robertson Bickham ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Ji Wang

    IPC分类号： G02B6/028 ,  H04J14/04

    CPC分类号： G02B6/0288 ,  G02B6/02019 ,  G02B6/02023 ,  G02B6/03627 ,  G02B6/0365 ,  H04J14/04

    摘要： A few mode optical fiber suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The optical fiber has a graded-index core with a radius R1 in the range from 8 μm to 14 μm, an alpha value greater than or equal to about 2.3 and less than about 2.7 at a wavelength of 1550 nm, and a maximum relative refractive index Δ1MAX from about 0.3% to about 0.6% relative to the cladding. The optical fiber also has an effective area greater than about 90 μm2 and less than about 160 μm2. The core and cladding support only the LP01 and LP11 modes at wavelengths greater than 1500 nm. The cladding has a maximum relative refractive index Δ4MAX such that Δ1MAX>Δ4MAX, and the differential group delay between the LP01 and LP11 modes is less than about 0.5 ns/km at a wavelength of 1550 nm.

    摘要翻译： 公开了适用于模分多路复用（MDM）光传输系统的几种模式光纤。 光纤具有半径R1在8μm至14μm范围内的梯度折射率芯，在1550nm波长处大于或等于约2.3且小于约2.7的α值，以及最大相对折射率 指数＆Dgr; 1MAX，相对于包层为约0.3％至约0.6％。 该光纤还具有大于约90μm2且小于约160μm2的有效面积。 芯和包层只支持波长大于1500 nm的LP01和LP11模式。 包层具有最大相对折射率＆Dgr; 4MAX，使得＆Dgr; 1MAX>＆Dgr; 4MAX，并且LP01和LP11模式之间的差分群延迟在1550nm的波长处小于约0.5ns / km。

    High numerical aperture fiber
    9.
    发明申请
    High numerical aperture fiber 失效
    高数值孔径光纤

    公开(公告)号：US20080181567A1

    公开(公告)日：2008-07-31

    申请号：US11701287

    申请日：2007-01-31

    申请人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Michael Thomas Murtagh ,  Daniel Aloysius Nolan ,  Pushkar Tandon ,  Ji Wang

    发明人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Michael Thomas Murtagh ,  Daniel Aloysius Nolan ,  Pushkar Tandon ,  Ji Wang

    IPC分类号： G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/02366 ,  G02B6/024 ,  G02B6/03633

    摘要： An optical fiber comprising: a silica based core having a first index of refraction n1; and at least one silica based cladding surrounding the core, the at least one silica based cladding comprising index lowering non-periodic voids containing a gas, wherein at least 80% of said voids have a maximum cross-sectional dimension of less than 2000 nm, and the NA of the fiber layer situated immediately adjacent to and inside said at least one silica based cladding is at least 0.2.

    摘要翻译： 一种光纤，包括：具有第一折射率n 1的二氧化硅基核; 以及包围所述芯的至少一个二氧化硅基包层，所述至少一个二氧化硅基包层包含含有气体的折射率降低的非周期性空隙，其中至少80％的所述空隙具有小于2000nm的最大横截面尺寸， 并且位于所述至少一个基于二氧化硅的包层内和所述至少一个二氧化硅基包层内的所述纤维层的NA为至少0.2。