Visual-Attention-Based Pixel Dimming Technique for OLED Displays of Mobile Devices

Chia Hung Yeh*, Kyle Shih Huang Lo, Weisi Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Organic light-emitting diode (OLED) display has been widely used for mobile devices due to its features of wide color range and high contrast. However, display systems dominate the significant power consumption of mobile devices that limit its usage time. Hence, this paper proposes a visual-attention-based pixel dimming (VAB-PD) technique to achieve power saving for real-time video displaying on OLED mobile devices. First, the proposed method extracts motion vector (MV) array from the bitstream. Next, considering the perception of human vision to moving objects, a saliency map is calculated from the MV array. Finally, a pixel dimming function is designed to reduce the brightness of the pixels lying in the unnoticeable parts of the video frames, thereby elevating the energy efficiency without deteriorating the visual quality. In addition, an absolute category rating 11-grade scale (ACR11) subjective visual quality test is conducted to determine the optimal coefficient for the dimming function. The experimental results demonstrate that VAB-PD can accomplish 13% of power reduction on average while maintaining acceptable visual quality.

Original languageEnglish
Article number8490901
Pages (from-to)7159-7167
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number9
DOIs
Publication statusPublished - 2019 Sep

Keywords

  • Mobile device
  • motion
  • organic light-emitting diode (OLED) display
  • power saving
  • subjective visual test
  • video display
  • visual attention

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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