发明申请
US20110267375A1 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

LOAD-AWARE COMPENSATION IN LIGHT-EMITTING-DIODE BACKLIGHT ILLUMINATION SYSTEMS
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.
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