전류 센싱 없는 패턴 강건형 방법 기반 IR-drop 보상 프레임워크

초록

In AMOLED displays, the IR drop phenomenon caused by voltage drops along power lines becomes more severe as panel size and luminance increase, resulting in luminance and color non-uniformity. This paper proposes a three-stage IR drop compensation framework that can be implemented purely in software without requiring any current or voltage sensing. The proposed method first quantifies pixel-level current imbalance to perform initial correction using a Current Lookup Table(LUT), then compensates global luminance variations through an Average Picture Level(APL)-based Ratio and Target LUT. Subsequently, a position-indexed Local LUT and weighted blending are applied to correct regional luminance deviations, while a temporal filter is employed to suppress inter-frame flicker. Experimental results demonstrate that the proposed approach effectively enhances color accuracy and luminance uniformity without hardware modification, achieving stable compensation performance under various driving conditions.

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