METHODS AND APPARATUS FOR DRIVING DISCHARGE LAMPS
    81.
    发明申请
    METHODS AND APPARATUS FOR DRIVING DISCHARGE LAMPS 失效
    驱动放电灯的方法和装置

    公开(公告)号:US20100072906A1

    公开(公告)日:2010-03-25

    申请号:US12510089

    申请日:2009-07-27

    IPC分类号: H05B37/02

    CPC分类号: H05B41/2827 H05B41/3925

    摘要: Methods and apparatus for driving discharge lamps are disclosed herein. In one embodiment, a method for driving a discharge lamp includes generating a switching signal to drive a discharge lamp, monitoring a working status of the discharge lamp, and determining whether the discharge lamp is operating abnormally based at least in part on the monitored working status. The method also includes decreasing a duty cycle of the switching signal when the discharge lamp is determined to operate abnormally.

    摘要翻译: 本文公开了用于驱动放电灯的方法和装置。 在一个实施例中,用于驱动放电灯的方法包括产生切换信号以驱动放电灯,监视放电灯的工作状态,以及至少部分地基于所监视的工作状态来确定放电灯是否异常运行 。 该方法还包括当放电灯被确定为异常运行时,减小开关信号的占空比。

    SIMPLE PROTECTION CIRCUIT AND ADAPTIVE FREQUENCY SWEEPING METHOD FOR CCFL INVERTER
    82.
    发明申请
    SIMPLE PROTECTION CIRCUIT AND ADAPTIVE FREQUENCY SWEEPING METHOD FOR CCFL INVERTER 失效
    CCFL逆变器的简单保护电路和自适应频率扫描方法

    公开(公告)号:US20090140655A1

    公开(公告)日:2009-06-04

    申请号:US12166140

    申请日:2008-07-01

    IPC分类号: H05B37/02

    CPC分类号: H05B41/2855

    摘要: A CCFL inverter circuit integrates a feedback circuit and protection circuit together. For both in-phase and out-of-phase applications, sensed lamp voltages can be used for open lamp and short lamp detection and sensed currents can be used for open lamp detection. The driving circuit adjusts the open lamp frequency by using a duty cycle control signal so that the driving circuit can always achieve the desired lamp voltage gain.

    摘要翻译: CCFL逆变电路将反馈电路和保护电路集成在一起。 对于同相和异相应用,感测的灯电压可用于开灯和短灯检测,并且感测电流可用于开灯检测。 驱动电路通过使用占空比控制信号来调节开路频率,使得驱动电路总能达到期望的灯电压增益。

    DC/AC convert for driving cold cathode fluorescent lamp
    83.
    发明申请
    DC/AC convert for driving cold cathode fluorescent lamp 失效
    DC / AC转换驱动冷阴极荧光灯

    公开(公告)号:US20070086217A1

    公开(公告)日:2007-04-19

    申请号:US11582916

    申请日:2006-10-17

    IPC分类号: H02M3/335

    摘要: The present invention discloses a DC/AC converter in the backlight power supply system using cold cathode fluorescent lamp (CCFL). The DC/AC converter comprises a front end DC/DC converter, a full-bridge or half bridge inverter, and a piezoelectric transformer. Even with a wide range of input voltages, the front end DC/DC converter produces a predetermined DC voltage or a DC voltage with a predetermined small range and the cascaded inverter operates with a switching frequency close to the resonant frequency of the piezoelectric transformer, which helps the backlight power supply system achieve high efficiency.

    摘要翻译: 本发明公开了一种使用冷阴极荧光灯(CCFL)的背光电源系统中的DC / AC转换器。 DC / AC转换器包括前端DC / DC转换器,全桥或半桥逆变器和压电变压器。 即使具有宽范围的输入电压,前端DC / DC转换器产生预定的直流电压或具有预定的小范围的直流电压,并且级联的逆变器以接近压电变压器的谐振频率的开关频率工作,其中 帮助背光源供电系统实现高效率。

    Driver systems for driving light emitting diodes and associated driving methods
    85.
    发明授权
    Driver systems for driving light emitting diodes and associated driving methods 有权
    用于驱动发光二极管的驱动器系统和相关的驱动方法

    公开(公告)号:US08952632B2

    公开(公告)日:2015-02-10

    申请号:US13048751

    申请日:2011-03-15

    IPC分类号: H05B37/02 H05B33/08

    CPC分类号: H05B33/0818 H05B33/0848

    摘要: LED driver systems and associated methods of control are disclosed herein. In one embodiment, the LED driver system comprises a converter and a controller. The controller is responsive to the LED current feedback signal and a dimming signal, and operable to generate a continuous gate drive signal to control the primary side switch of the converter. Thus, the controller regulates the output current of the converter.

    摘要翻译: 本文公开了LED驱动器系统和相关联的控制方法。 在一个实施例中,LED驱动器系统包括转换器和控制器。 控制器响应于LED电流反馈信号和调光信号,并且可操作以产生连续的栅极驱动信号以控制转换器的初级侧开关。 因此,控制器调节转换器的输出电流。

    Multi-mode dimming circuit
    86.
    发明授权
    Multi-mode dimming circuit 有权
    多模式调光电路

    公开(公告)号:US08604710B2

    公开(公告)日:2013-12-10

    申请号:US13224893

    申请日:2011-09-02

    IPC分类号: H05B37/02

    摘要: The present disclosure discloses a multi-mode dimming circuit configurable to operate in a first dimming mode, a second dimming mode and a third dimming mode. The present disclosure also discloses separate dimming circuits for respectively realize the three dimming modes. In one embodiment the multi-mode dimming circuit may comprise a first input terminal, a second input terminal, a third input terminal, an output terminal, a resistive device, an oscillation circuit and a pulse width modulation (PWM) circuit. Users may flexibly configure the multi-mode dimming circuit to operate in one of the three different dimming modes by varying the external devices and/or signals coupled to each of the first, second and third input terminals.

    摘要翻译: 本公开公开了一种多模式调光电路,其可配置为在第一调光模式,第二调光模式和第三调光模式中操作。 本公开还公开了用于分别实现三个调光模式的单独的调光电路。 在一个实施例中,多模式调光电路可以包括第一输入端,第二输入端,第三输入端,输出端,电阻器件,振荡电路和脉冲宽度调制(PWM)电路。 用户可以通过改变耦合到第一,第二和第三输入端子中的每一个的外部设备和/或信号来灵活地将多模式调光电路配置为以三种不同的调光模式之一工作。

    Circuit and method for striking CCFL
    87.
    发明授权
    Circuit and method for striking CCFL 有权
    撞击CCFL的电路和方法

    公开(公告)号:US08373349B2

    公开(公告)日:2013-02-12

    申请号:US12764830

    申请日:2010-04-21

    IPC分类号: H05B41/16

    CPC分类号: H05B41/282 Y02B20/183

    摘要: A circuit for controlling the switch frequency of an inverter that strikes and drives fluorescent lamps is disclosed. The circuit comprises a frequency generator and an offset circuit. The offset circuit provides a current signal in response to the lamp status. The frequency generator provides a frequency control signal in respond to the current signal so as to control the switch frequency of the inverter. When the lamp is open, the switch frequency of the inverter is higher; when the lamp is lighted, the switch frequency of the inverter is lower.

    摘要翻译: 公开了一种用于控制触发和驱动荧光灯的逆变器的开关频率的电路。 电路包括频率发生器和偏移电路。 偏移电路响应于灯状态而提供电流信号。 频率发生器提供响应于当前信号的频率控制信号,以便控制逆变器的开关频率。 当灯泡打开时,变频器的开关频率较高; 当灯点亮时,变频器的开关频率较低。

    MULTIPHASE CONVERTER WITH CONTROLLABLE PHASE SHIFT
    88.
    发明申请
    MULTIPHASE CONVERTER WITH CONTROLLABLE PHASE SHIFT 有权
    具有可控相移的多相转换器

    公开(公告)号:US20120274293A1

    公开(公告)日:2012-11-01

    申请号:US13457831

    申请日:2012-04-27

    IPC分类号: G05F1/00

    CPC分类号: H02M3/1584 H02M2003/1586

    摘要: In one embodiment, a multiphase converter is disclosed. The multiphase converter may comprise a plurality of phase circuits and a plurality of phase control circuits. Each phase circuit may comprise a switch having a control terminal, and the control terminal of the switch may be configured to receive a drive signal. Each phase control circuit may be corresponding to one of the phase circuits, and each phase control circuit may be configured to provide a phase control signal to adjust an ON-time period or a reference signal for the corresponding phase circuit. The phase control signal may be responsive to the drive signal of the corresponding phase circuit.

    摘要翻译: 在一个实施例中,公开了一种多相转换器。 多相转换器可以包括多个相电路和多个相位控制电路。 每相电路可以包括具有控制端的开关,并且开关的控制端可被配置为接收驱动信号。 每个相位控制电路可以对应于一个相位电路,并且每个相位控制电路可以被配置为提供相位控制信号以调整相应相位电路的接通时间周期或参考信号。 相位控制信号可以响应相应的相位电路的驱动信号。

    Switching mode power supply with burst mode and associated methods of control
    89.
    发明授权
    Switching mode power supply with burst mode and associated methods of control 有权
    具有突发模式和相关联控制方式的开关模式电源

    公开(公告)号:US08274801B2

    公开(公告)日:2012-09-25

    申请号:US12873072

    申请日:2010-08-31

    IPC分类号: H02M3/335 H02M3/338

    摘要: Switching mode power supplies (SMPS) that can operate in a control mode for a normal load condition and operate with a burst-mode controller for a light load condition are disclosed herein. In one embodiment, a method for controlling the switching mode power supply includes when the load is in a light load condition, the switching mode power supply is controlled by a burst-mode controller.

    摘要翻译: 这里公开了可以在正常负载条件的控制模式下操作并且用于轻负载条件的突发模式控制器操作的开关模式电源(SMPS)。 在一个实施例中,用于控制开关模式电源的方法包括当负载处于轻负载状态时,开关模式电源由突发模式控制器控制。

    Switching mode power supply with a spectrum shaping circuit
    90.
    发明授权
    Switching mode power supply with a spectrum shaping circuit 有权
    具有频谱整形电路的开关电源

    公开(公告)号:US08270185B2

    公开(公告)日:2012-09-18

    申请号:US12697979

    申请日:2010-02-01

    IPC分类号: H02M3/335

    CPC分类号: H02M3/33507

    摘要: In accordance with the teachings described herein, systems and methods are provided for a switching mode power supply. In one example, the switching mode power supply may include a transformer, a switching circuit and a switching control circuit. The transformer receives a DC input voltage on a primary winding and generates a DC output voltage on a secondary winding. The switching circuit, which may include a MOSFET switch, is coupled to the transformer and is configured to switch the transformer on and off. The switching control circuit generates a switching control signal to control the switching circuit in order to regulate the DC output voltage of the transformer. The switching control circuit is configured to generate the switching control signal as a function of a timing signal having a varying frequency, wherein the varying frequency of the timing signal causes a switching frequency of the switching circuit to vary over a period of time in order to reduce electromagnetic interference caused by the switching circuit.

    摘要翻译: 根据本文所述的教导,提供了用于开关模式电源的系统和方法。 在一个示例中,开关模式电源可以包括变压器,开关电路和开关控制电路。 变压器在初级绕组上接收直流输入电压,并在次级绕组上产生直流输出电压。 可以包括MOSFET开关的开关电路耦合到变压器并且被配置为开关变压器。 开关控制电路产生开关控制信号以控制开关电路,以便调节变压器的直流输出电压。 开关控制电路被配置为根据具有变化频率的定时信号产生开关控制信号,其中定时信号的变化频率使开关电路的开关频率在一段时间内变化,以便 减少开关电路引起的电磁干扰。