Accurate power model for mobile AMOLED displays

The display is a dominant power-consuming component in mobile devices. The active matrix organic light-emitting diode (AMOLED) display has been popular in mobile devices and its accurate power model is crucial for efficient power management. Existing power models do not consider the behaviours of the driving hardware components of AMOLED display modules. A new power model is proposed which considers the efficiency of an AMOLED DC-DC converter and the dependency of the driving circuits in a commercial AMOLED display module, and thus estimates an accurate power consumption value. Through extensive experiments using three well-known image databases, the proposed power model is found to have lower error rates than the existing pixel-based one for all the databases. Especially, for bright images the error rate of the new model amounts to only 0.59%, whereas that of the existing one is 8.48%.