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    Method and apparatus for efficient network scanning
    7.
    发明申请
    Method and apparatus for efficient network scanning 有权
    高效网络扫描的方法和装置

    公开(公告)号：US20060068781A1

    公开(公告)日：2006-03-30

    申请号：US10949299

    申请日：2004-09-27

    申请人： Yiu Lam

    发明人： Yiu Lam

    IPC分类号： H04Q7/20

    CPC分类号： H04W48/16 ,  H04W48/18

    摘要： A method and apparatus for efficient network scanning that selects candidate frequencies based upon the frequency bands that were noted as being active during a previous network scan. A mobile device performs a full network scan on power up or on radio cycle and determines the available active bands. This information is stored as active band information on the device. When the device loses coverage on a selected one of the bands, then it identifies a candidate frequency based upon the stored active band information and attempts to locate a suitable network on the candidate band.

    摘要翻译： 一种用于有效网络扫描的方法和装置，其基于在先前网络扫描期间被注意为活动的频带来选择候选频率。 移动设备在上电或无线电周期执行完整的网络扫描，并确定可用的活动频段。 该信息作为活动频带信息存储在设备上。 当设备在选定的一个频带上丢失覆盖时，则基于所存储的活动频带信息来识别候选频率，并尝试在候选频带上定位合适的网络。

    PHASE-CONTROLLED DIMMABLE ELECTRONIC BALLASTS FOR FLUORESCENT LAMPS WITH VERY WIDE DIMMING RANGE
    8.
    发明申请
    PHASE-CONTROLLED DIMMABLE ELECTRONIC BALLASTS FOR FLUORESCENT LAMPS WITH VERY WIDE DIMMING RANGE 审中-公开
    用于荧光灯的相控二极管电子束，具有非常宽的调光范围

    公开(公告)号：US20080030148A1

    公开(公告)日：2008-02-07

    申请号：US11769055

    申请日：2007-06-27

    申请人： Pak TANG ,  Yiu Lam ,  Shu Chung ,  Ron Hui

    发明人： Pak TANG ,  Yiu Lam ,  Shu Chung ,  Ron Hui

    IPC分类号： H05B37/02

    CPC分类号： H05B41/3924 ,  H05B41/3925

    摘要： In order to achieving wide dimming range for compact and tubular fluorescent lamps, two novel control approaches are proposed. (i) Novel techniques for suppressing oscillatory effects in the Triac circuit so as to maintain stable Triac operation over a wide firing angle range and (ii) a hybrid dimming control technique in the ballast inverter circuit for achieving wide dimming range from 100% to about 3%. Concerning point (i) both dissipative and non-dissipative energy absorption schemes (EAS) are proposed to suppress the transient effects in the Triac circuit when the Triac is turned on. The essence of the EAS is to ensure that the Triac circuit can be operated in a stable manner without oscillations or inadvertent turn-off. With respect to pint (ii) a hybrid dimming method is proposed in which unlike traditional control methods that use inverter frequency control only for dimming purposes, both dc link voltage and inverter frequency are varied. The essence of the new dimming control is to reduce the range of the inverter frequency variation so that the overall dimming range can be made as wide as possible.

    摘要翻译： 为了实现紧凑型和管状荧光灯的宽调光范围，提出了两种新颖的控制方法。 （i）用于抑制Triac电路中的振荡效应的新技术，以便在宽的触发角度范围内保持稳定的Triac操作，以及（ii）用于镇流逆变器电路中的混合调光控制技术，以实现从100％到大约的宽调光范围 3％。 关于点（i）提出耗散和非耗散能量吸收方案（EAS），以在Triac开启时抑制Triac电路中的瞬态效应。 EAS的本质是确保Triac电路可以稳定运行，无振荡或无意的关断。 关于品脱（ii）提出了一种混合调光方法，其中不同于使用变频器频率控制仅用于调光目的的传统控制方法，直流链路电压和逆变器频率都是变化的。 新的调光控制的本质是减小变频器频率变化的范围，使整体调光范围尽可能宽。