Energy conservation to protract battery life is a major challenge for sustained richer user experience in mobile devices. This paper presents Content Change Rate Coefficient (CCRC) and image Color Distribution Coefficient (CDC) based method to govern backlight scaling and image luminosity adjustment to reduce power consumption in backlight module. The existing methods intending to achieve similar results have significant shortcomings like inter-frame brightness distortion, flickering effects, clipping artifacts, color distortion. These problems are addressed in proposed technique and user's visual perception is not compromised while ensuring image fidelity (less than 6.2% degradation) and reduces nearly 80mA current consumption. Proposed method derives Aggressiveness Coefficient from color distribution and content change rate to address above problems. Method is prototyped on Samsung Galaxy Tab AS and Galaxy Mega2 and experimental results clearly show 16% reduction in current consumption and 88% reduction in flickering artifacts, which is active phone usage time getting extended by ~1hr for an average usage of 20hrs.
['Raghu Bankapur', 'Krishna Kishor Jha', 'P S Vaisakh']
Display Content Change Rate Analysis for Power Saving in Transmissive Panels