9 February 2006 LCD motion-blur analysis, perception, and reduction using synchronized backlight flashing
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Abstract
One of the image quality issues of LC TV is the motion blur. In this paper, the LCD motion blur is modeled using a frequency domain analysis, where the motion of an object causes temporal component in the spatial/temporal spectrum. The combination of display temporal low-pass filtering and eye tracking causes the perception of motion blur. One way to reduce motion blur is to use backlight flashing, where the shorter "on" duration reduces the display temporal aperture function, thus improves the temporal transfer function of the display. The backlight flashing was implemented on a LCD with a backlight system consisting of an array of light emitting diodes (LED). The LED can be flashed on for a short duration after LCD reaches the target level. The effect of motion blur reduction was evaluated both objectively and subjectively. In the objective experiment, the retina image is derived from a sequence of captured images using a high speed camera. The subjective study compares the motion blur to an edge with a simulated edge blur. The comparison of objective and subjective experiments shows a good agreement. Both objective measurement and subjective experiment shows clear improvement in motion blur reduction with synchronized backlight flashing.
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Xiao-fan Feng, "LCD motion-blur analysis, perception, and reduction using synchronized backlight flashing", Proc. SPIE 6057, Human Vision and Electronic Imaging XI, 60570M (9 February 2006); doi: 10.1117/12.643893; https://doi.org/10.1117/12.643893
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