Patent ID: 7034900

Claim:
A color projection-type display system having a convergence correction signal generation component comprising: an analog signal generator which generates said convergence correction signal, said analog signal generator having an input portion for receiving digital convergence correction data; and a memory coupled to supply digital data to said analog signal generator, said memory configured with convergence correction data for a high definition video signal which has a blanking period shorter than that of a NTSC signal, said convergence correction data corresponding to correction points along a horizontal scan line, said convergence correction data including additional correction points which are set in proximity to an edge portion of a display area in said horizontal scan line, the number of correction points in said convergence correction data being greater than the number of correction points in convergence correction data for said NTSC signal, wherein correction points including additional correction points proximate said edge portion of said display area have smaller separation than corrections points in a central portion of said display area, said convergence correction data being used for convergence correction of the displayed high definition video signal.