Patent ID: 6697085
Filing Date: 2004-02-24
Classification: G09G

Abstract:
A method for reducing dynamic false contour in a plasma display panel (PDP) comprising the steps of:selecting some gray scales of different visual concentration series from all of gray scales available to be shown on said PDP to form a visual concentration conversion table, said visual concentration series corresponding to a coefficient of visual concentration defined as follows: coefficient of visual concentration=(t1m1+t2m2+t3 m3+ . . . )/(m1+m2+m3+ . . . ), where: m1, m2, m3, . . . are weights of each sub-field of each field, and t1, t2, t3, . . . are times from a beginning to a midpoint during a sustain period of each sub-field; selecting at least one of said visual concentration series as a virtual visual concentration series; converting an original input value of a gray scale of each discharge unit into a corresponding said selected gray scales of different visual concentration series via said conversion table and corresponding gray scale of said virtual visual concentration series while showing each field of a dynamic image on said PDP; and showing said converted gray scales on corresponding said discharge units corresponding to each sub-field of each field; wherein said gray scales are selected to show the same value of gray scale based on the number of sustain pulses corresponding to values of said gray scales of different visual concentration series and virtual visual concentration series.