Patent ID: 6268848
Filing Date: 2001-07-31
Classification: G09G

Abstract:
A method of optimizing the points in time that an analog display signal is sampled, said method comprising the steps of:(a) receiving said analog display signal, wherein said analog display signal contains a plurality of image frames;(b) generating a sampling clock delayed by a phase;(c) sampling a plurality of lines in an image frame at points in time determined by said sampling clock to generate a plurality of display signal digital samples;(d) generating a value which is a function of said display signal digital samples; and(e) modifying said phase for successive image frames and performing steps (b)-(d) to maximize said value, wherein step (e) comprises:(j) detecting peaks and/or valleys of a signal representing said display signal digital samples;(k) generating a first numerical value based upon relative values of magnitudes of the peaks and/or valleys; and(l) adjusting the delay of the sampling clock maximizing the first numerical value,wherein said phase corresponding to said maximum value represents optimal points in time to sample said analog display signal.