Patent ID: 7593062

Claim:
A video display device comprising: a video signal processor converting inputted video signals into digital signals, applying predetermined video signal processing, and producing video signals to be displayed on a plasma display panel; a frame memory in which video signals produced by said video signal processor are stored; a plasma display panel module inputting video signals stored in said frame memory and displaying them on the plasma display panel through a driver driving each pixel, a luminance level detector detecting a luminance level in each pixel position on the screen; a luminance level storing unit storing luminance levels at predetermined intervals detected by the luminance level detector; a luminance level comparing unit comparing the luminance levels before and after the predetermined time period stored in said luminance level storing unit, a video image processor applying predetermined video signal processing and producing video signals to be displayed on the screen regards a portion as a high-luminance portion when a difference in the luminance level at pixel positions on the screen before and after a predetermined time period is less than a predetermined value and the luminance level after the predetermined time period is more than a predetermined value according to said luminance level comparing unit when showing a picture without trimming while an aspect ratio of the video signals stored in said frame memory is different from that of screen of the plasma display panel, with respect to video signals in the areas bordering on blank zones containing no picture appearing in the upper and lower ends or right and left ends of the screen of the plasma display panel, said video signal processor reduces the luminance difference by lowering levels of overshoots and undershoots accompanying sharpness processing to cope with blurring of the edge portions caused by bilinear interpolation, thereby suppresses burn-in in the areas bordering on said blank zones on the plasma display panel.