FingerShadow is proposed as screen power-saving technique

With all the new-version features and form-factor advances in smartphones, a common problem still remains, and that is power. Displays place a strain on battery life. Advances in the Organic Light Emitting Diode (OLED) screen are in place but researchers say the screen remains a power-hungry module. Xiang Chen, Kent W. Nixon, Hucheng Zhou, Yunxin Liu, and Yiran Chen, a team of five representing Microsoft Research in Beijing and the University of Pittsburgh, are calling attention to a solution in their paper, "FingerShadow: An OLED Power Optimization based on Smartphone Touch Interactions."

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