Method and apparatus for displaying gray scale of plasma display panel

Abstract

A method and apparatus for displaying a gray scale of a plasma display panel, by which generation of a pseudo contour upon expression of a gray scale with respect to a moving picture is prevented when a picture is displayed on a plasma display panel. The method can prevent generation of pseudo contours of dark lines (or bright lines) so that a temporal inconsistency appears as spatial inconsistency, at a portion of a moving picture in which gray scale changes are subtle, when expressing a gray scale by temporal duplication of light emission using the after-image effect of vision. In view of the fact that a pseudo contour is generated because the movement of a pixel is not consistent with the movement of the human eye, and thus a temporal change in luminance is shown as dispersion of luminance on retinas, the present invention redistributes of sub-fields having the luminance of one cell to several cells, as many sub-fields corresponding to the inconsistency of the detected movement of a pixel with the movement of the eye. Accordingly, the movement of a pixel can be approximately consistent with the movement of the eye. Consequently, the retina of the eye can perceive the temporal stimulation of an original picture, so that pseudo contour phenomenon is reduced regardless of the moving speed of a picture.