Abstract
Backlight dimming, which decreases the backlight luminance level and performs pixel compensation, is known as the most effective way to reduce the power consumption of portable electronic devices with LCD. In this paper, we propose an adaptive backlight dimming technique that preserves the quality of details in images even when the backlight luminance of LCD devices is greatly reduced. The proposed backlight dimming method consists of the following two steps: clipped point selection and image compensation. In the first step, to reduce power consumption, the proposed approach selects a suitable clipped point according to the chosen level for a given image based on the maximum and average value. In the second step, several parameters are adaptively chosen according to the characteristic of a given image. These parameters are then used to compensate pixels with an edge enhancement technique. The simulation results show that at the same clipping point the proposed method has higher detailed information than others.
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