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We present a novel simulation model for the 3D crosstalk of plasma displays, which is a partial leaking of the image for the left eye into the right eye and vice versa. It is known that the 3D crosstalk degrades the 3D image quality seriously. In plasma displays, active shutter glasses are used to realize 3D display capability, and the phosphor decay response and the slow rising response of the liquid crystal (LC) shutter lenses influence the 3D crosstalk. In this paper, we investigate the mechanism of 3D crosstalk on plasma displays, and estimate its characteristics using the proposed model. The experimental results illustrate that the proposed model can be used efficiently to optimize the synchronization condition between the display and the active shutter glasses. In addition, we verify the effectiveness of the proposed model by introducing a new material for shutter lenses-ferroelectric liquid crystal (FLC)-which has fast switching characteristics and can enhance 3D image quality.