Patent ID: 7675482

Claim:
An apparatus for driving an interlaced plasma display panel (PDP), comprising: a delay device for receiving an image signal, delaying said image signal for a plurality of fields and outputting said delayed image signal; an image upper and lower edge detection device for receiving and analyzing said image signal, outputting an upper and lower edge position of said image signal, saving and providing an odd field upper and lower edge data of said image signal, wherein said image upper and lower edge detection device further comprises: a scan line decision device for receiving said image signal, and outputting a decision signal based on image signal of scan lines in said image signal; an upper edge detection device for outputting a temporary upper edge position of said image signal according to said decision signal; a lower edge detection device for outputting a temporary lower edge position of said image signal according to said decision signal; an upper edge comparison device for comparing said temporary upper edge positions of said image signal in the odd field and even field, taking the lower one as said scan line upper edge position for output and outputting said upper edge field position; a lower edge comparison device for comparing said temporary lower edge positions of said image signal in the odd field and even field, taking the higher one as said scan line lower edge position for output and outputting said lower edge field position; and an odd field upper and lower edge memory device for receiving said image signal and the upper and lower edge positions of said image, saving and providing said odd field upper and lower edge data of said image signal; and an image border processing device for outputting said image signal after border processing according to said delayed image signal, said upper and lower edge positions and said odd field upper and lower edge data; and an image processing and analog control loop for outputting a driving signal according to said image signal after boundary processing and said upper and lower edge positions.