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    High-voltage regulated power supply
    5.
    发明授权
    High-voltage regulated power supply 有权
    高压稳压电源

    公开(公告)号：US08610411B2

    公开(公告)日：2013-12-17

    申请号：US13090128

    申请日：2011-04-19

    申请人： Eric Smith ,  P. Jeffrey Ungar ,  Heather R. Sullens

    发明人： Eric Smith ,  P. Jeffrey Ungar ,  Heather R. Sullens

    IPC分类号： G05F1/563

    CPC分类号： H02M7/10

    摘要： The disclosed embodiments relate to a power-supply circuit, an electronic device that includes the power-supply circuit, and a method for generating high-voltage DC power from AC line power using the power-supply circuit. This power-supply circuit includes a voltage multiplier and a low dropout (LDO) regulator, and does not include a step-up transformer. Conventional power supplies often use a custom step-up transformer, which is expensive unless the power supplies are manufactured in high quantities. In contrast, one embodiment of the present disclosure provides a solid-state implementation of a 700 V regulated power supply that can take up to a 1020 V input from an 6× voltage multiplier powered from the AC mains. Hence, the disclosed power-supply circuit eliminates the need for large, heavy and expensive step-up transformers and chokes that are used in conventional high-voltage DC power supplies.

    摘要翻译： 所公开的实施例涉及电源电路，包括电源电路的电子设备以及使用电源电路从AC线路电力产生高压DC电力的方法。 该电源电路包括电压倍增器和低压差（LDO）调节器，并且不包括升压变压器。 常规电源通常使用定制的升压变压器，这是非常昂贵的，除非电源大量生产。 相比之下，本公开的一个实施例提供了700V稳压电源的固态实现，其可以从由AC电源供电的6×电压倍增器采用高达1020V的输入。 因此，所公开的电源电路消除了对常规高压直流电源中使用的大型，重型和昂贵的升压变压器和扼流器的需要。

    LED backlight driver synchronization and power reduction
    7.
    发明授权
    LED backlight driver synchronization and power reduction 有权
    LED背光驱动器同步和功率降低

    公开(公告)号：US08547321B2

    公开(公告)日：2013-10-01

    申请号：US12178471

    申请日：2008-07-23

    申请人： Eric Smith

    发明人： Eric Smith

    IPC分类号： G09G3/36

    CPC分类号： G09G3/342 ,  G09G2330/021

    摘要： A method and apparatus for providing a LED backlight to a LCD display screen is disclosed. In one embodiment, the apparatus includes: N LED strings, wherein N is an integer greater than or equal to two; a first circuit operable to synchronize a LED clock signal to a LCD timing signal; and a second circuit operable to generate N PWM drive signals synchronized with the LED clock signal, wherein the N PWM drive signals are phase offset from each other by a multiple of 360/N degrees and used to drive respective ones of the N LED strings.

    摘要翻译： 公开了一种用于向LCD显示屏提供LED背光的方法和装置。 在一个实施例中，该装置包括：N个LED串，其中N是大于或等于2的整数; 第一电路，其可操作以将LED时钟信号与LCD定时信号同步; 以及第二电路，其可操作以产生与所述LED时钟信号同步的N个PWM驱动信号，其中所述N个PWM驱动信号彼此相位偏移360 / N度的倍数，并用于驱动所述N个LED串中的相应的一个。

    SINGLE-INDUCTOR MULTIPLE-OUTPUT POWER SUPPLY WITH DEFAULT PATH
    9.
    发明申请
    SINGLE-INDUCTOR MULTIPLE-OUTPUT POWER SUPPLY WITH DEFAULT PATH 审中-公开
    单电源多路输出电源与默认路径

    公开(公告)号：US20120086426A1

    公开(公告)日：2012-04-12

    申请号：US12903078

    申请日：2010-10-12

    申请人： Eric Smith

    发明人： Eric Smith

    IPC分类号： G05F3/16

    CPC分类号： H02M3/1588 ,  H02M3/1584 ,  H02M2001/008 ,  Y02B70/1466

    摘要： The disclosed embodiments relate to a power supply for a portable electronic device. This power supply includes a power source, an inductor, a control circuit, and an input switch that couples the input terminal of the inductor to either the power source or a reference voltage. The power supply also includes a first output path that produces a first output voltage and a second output path that produces a second output voltage. The first output path includes a first diode coupled between the output terminal of the inductor and the first output voltage, and a first output capacitor coupled between the first output voltage and the reference voltage. The second output path includes a second diode and an output switch coupled between the output terminal and the second output voltage, and a second output capacitor coupled between the second output voltage and the reference voltage.

    摘要翻译： 所公开的实施例涉及便携式电子设备的电源。 该电源包括电源，电感器，控制电路和将电感器的输入端子耦合到电源或参考电压的输入开关。 电源还包括产生第一输出电压的第一输出路径和产生第二输出电压的第二输出路径。 第一输出路径包括耦合在电感器的输出端和第一输出电压之间的第一二极管和耦合在第一输出电压和参考电压之间的第一输出电容器。 第二输出路径包括耦合在输出端和第二输出电压之间的第二二极管和输出开关，以及耦合在第二输出电压和参考电压之间的第二输出电容器。