Dynamic Gray‐Scale Control to Reduce Motion Picture Disturbance for High‐Resolution PDP

A new approach is presented to reduce motional false contour artifacts, or motion picture disturbance, in ACPDP by dynamically controlling usable gray-scale levels. Limited gray-scale levels are selected to form a stretched-out coding, which is used in motion area where the disturbance could be visible. A disturbance-free condition in the stretched-out coding is discussed and verified through the simulation with virtual retina model. Gray-scales in motion area are substantially restored both by error diffusion based on Floyd and Steinberg, and by response of human vision combined with subfield driving sequence. The algorithm, also being compatible with the highest HDTV standard with resolution of 1920 × 1080 progressive, just requires simplified motion detection without motion vectors. The actual 42-in PDPs with this algorithm using 10 subfields showed robust and better performance over conventional approaches.