PLASMA DISPLAY UNIT AND METHOD FOR PROCESSING THE SAME

摘要

A plasma display unit, wherein a single field consists of a plurality of weighted subfields, includes a measurement circuit (130) to measure an occurrence rate of a specific gray-scale group in a first image signal (S2) for each field, a processing circuit (140) to determine weighting of a plurality of subfields according to measured occurrence rate, a nonlinear converter circuit (30) which nonlinearly converts the first image signal (S2) into a second image signal (S3) on the basis of the processed result to represent the second image signal (S3) using a real part and an error part such that use of the specified lighting pattern may be avoided, and lighting pattern converter circuits (40, 50) which perform spatial or temporal error spreading processing operation of the error part in the second image signal (S3) to replace the specified lighting pattern with another lighting pattern. No error spreading processing operation is carried out for a gray-scale group with high occurrence rate, and weighting of each subfield is determined such that a gray-scale represented without use of the specified lighting pattern increases in number, thereby reducing occurrence of pseudo profile of a motion picture and granular noise.