LOAD-AWARE COMPENSATION IN LIGHT-EMITTING-DIODE BACKLIGHT ILLUMINATION SYSTEMS
    21.
    发明申请
    LOAD-AWARE COMPENSATION IN LIGHT-EMITTING-DIODE BACKLIGHT ILLUMINATION SYSTEMS 有权
    发光二极管背光照明系统中的负载补偿

    公开(公告)号:US20110267375A1

    公开(公告)日:2011-11-03

    申请号:US12772067

    申请日:2010-04-30

    IPC分类号: G09G5/10 H05B37/02

    摘要: System(s) and method(s) are provided for power management in an electronic display via compensation of a power source of a light-emitting-diode (LED) backlighting system. A compensation feedback loop includes a load-aware controller that receives the load condition from a dimming controller and supplies a control signal to the power source. An efficiency regulator functionally connected the backlight circuitry closes the compensation feedback loop and provides an input signal to the load-aware controller. The dimming controller implements phase-shifted pulse-modulation dimming, which based on duty cycle can establish a dimming equilibrium with two load conditions. The load aware controller includes a set of compensation blocks arranged in parallel, with a single compensation block connected to the input signal and that provides the control signal. A selector component in the load aware controller determines a compensation block to be connected to the compensation feedback loop based on the received load condition.

    摘要翻译: 通过补偿发光二极管(LED)背光系统的电源,为电子显示器中的电力管理提供系统和方法。 补偿反馈回路包括负载感知控制器,其从调光控制器接收负载状况,并向控制电源提供控制信号。 功能上连接到背光电路的效率调节器关闭补偿反馈回路并向负载感知控制器提供输入信号。 调光控制器实现相移脉冲调制调光,其基于占空比可以在两个负载条件下建立调光平衡。 负载感知控制器包括并联布置的一组补偿块,单个补偿块连接到输入信号并提供控制信号。 负载感知控制器中的选择器部件基于接收的负载条件确定要连接到补偿反馈回路的补偿块。

    POWER CONVERSION FEEDBACK CONTROL CIRCUIT
    22.
    发明申请
    POWER CONVERSION FEEDBACK CONTROL CIRCUIT 有权
    电源转换反馈控制电路

    公开(公告)号:US20130113445A1

    公开(公告)日:2013-05-09

    申请号:US13289603

    申请日:2011-11-04

    IPC分类号: G05F1/10

    摘要: A power conversion circuit of two feedback loops is disclosed that includes a feedback control circuit for ramping up or down a commanded voltage to a load (e.g., LEDs). The second feedback loop feeds into the first feedback loop, and the second feedback loop operates at a slower bandwidth than the first feedback loop. When ramping up or down the commanded voltage, a voltage overshoot results because of delay in the system. The overshoot can be compensated for by a final adjustment to the commanded voltage.

    摘要翻译: 公开了两个反馈回路的功率转换电路,其包括用于将指令电压上升或下降到负载(例如,LED)的反馈控制电路。 第二反馈环馈入第一反馈环路,第二反馈环路以比第一反馈环路更慢的带宽工作。 当升高或降低指令电压时,由于系统的延迟而导致电压过冲。 可以通过对指令电压进行最终调整来补偿过冲。

    Power conversion feedback control circuit for reaching a goal voltage
    23.
    发明授权
    Power conversion feedback control circuit for reaching a goal voltage 有权
    用于达到目标电压的功率转换反馈控制电路

    公开(公告)号:US08912770B2

    公开(公告)日:2014-12-16

    申请号:US13289603

    申请日:2011-11-04

    摘要: A power conversion circuit of two feedback loops is disclosed that includes a feedback control circuit for ramping up or down a commanded voltage to a load (e.g., LEDs). The second feedback loop feeds into the first feedback loop, and the second feedback loop operates at a slower bandwidth than the first feedback loop. When ramping up or down the commanded voltage, a voltage overshoot results because of delay in the system. The overshoot can be compensated for by a final adjustment to the commanded voltage.

    摘要翻译: 公开了两个反馈回路的功率转换电路,其包括用于将指令电压上升或下降到负载(例如,LED)的反馈控制电路。 第二反馈环馈入第一反馈环路,第二反馈环路以比第一反馈环路更慢的带宽工作。 当升高或降低指令电压时,由于系统的延迟而导致电压过冲。 可以通过对指令电压进行最终调整来补偿过冲。